CN1993843B - Battery module, battery pack, and battery module manufacturing method - Google Patents
Battery module, battery pack, and battery module manufacturing method Download PDFInfo
- Publication number
- CN1993843B CN1993843B CN2005800262145A CN200580026214A CN1993843B CN 1993843 B CN1993843 B CN 1993843B CN 2005800262145 A CN2005800262145 A CN 2005800262145A CN 200580026214 A CN200580026214 A CN 200580026214A CN 1993843 B CN1993843 B CN 1993843B
- Authority
- CN
- China
- Prior art keywords
- monocell
- battery module
- side cover
- air flue
- seal member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Battery Mounting, Suspending (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
本发明涉及电池模块、电池组以及电池模块制造方法。该电池组制造成本低并且包括电池模块，其中为每个单电池提供安全阀，其中可防止电池组气体泄漏。电池组(100)具有多个电池模块(110)，每个电池模块(110)都包括分别装有安全阀(123)的多个单电池(120)。包括在每个电池模块(110)中的多个单电池(120)都配置成安全阀安装壁(121a)沿同一方向定向。每个电池模块(110)都包括气道部件(130)，气道部件(130)覆盖包括在其中的单电池(120)的所有安全阀(123)，并且在气道部件(130)与安全阀安装壁(121a)之间形成有气体排出通路(131)；以及密封部件(160)，该密封部件用于气密密封每个单电池壳(121)与气道部件(130)之间的空间。
The present invention relates to a battery module, a battery pack, and a method for manufacturing a battery module. The battery pack has low manufacturing cost and includes a battery module, wherein a safety valve is provided for each single cell, wherein gas leakage of the battery pack can be prevented. The battery pack (100) has a plurality of battery modules (110), each battery module (110) including a plurality of single cells (120) each equipped with a safety valve (123). The plurality of single cells (120) included in each battery module (110) are configured so that the safety valve mounting wall (121a) is oriented in the same direction. Each battery module (110) includes an air passage component (130), the air passage component (130) covers all the safety valves (123) of the single cells (120) included therein, and a gas exhaust passage (131) is formed between the air passage component (130) and the safety valve mounting wall (121a); and a sealing component (160) for hermetically sealing the space between each single cell shell (121) and the air passage component (130).
Description
Technical field
The present invention relates to comprise the battery module (assembly) of a plurality of monocells, the battery pack that comprises described battery module and method for producing battery module.Particularly, the present invention relates in each monocell shell, be equipped with the battery module of safety valve, the battery pack that comprises described battery module and method for producing battery module.
Background technology
Up to now, the battery pack that comprises a plurality of monocells that all have safety valve is known.Safety valve is used for releasing the gas into the monocell outside when the internal pressure that causes monocell owing to the gas (hydrogen etc.) that produces during the charge/discharge surpasses fixing horizontal.This battery pack for example has been described in patent documentation 1.In the battery pack as an embodiment explanation of inventing in patent documentation 1, a plurality of battery module/unit cells (monocell) that all have safety valve are arranged in juxtaposition.Each safety valve all is connected with blast pipe, and this blast pipe will be connected in outside exhaust portion.Particularly, blast pipe has a plurality of outlet connecting portions, and each connecting portion all is contained in the gas vent of each safety valve to be connected with safety valve.In the battery pack of mentioning as correlation technique in patent documentation 1, T junction is arranged in the gas vent of safety valve, so that the two ends of joint connect in succession via blast pipe, thereby forms the gaseous emission pipeline that will be connected in outside exhaust portion.
In above-mentioned battery pack, when because when the gas that produces caused internal pressure in the battery module (monocell) to surpass fixing horizontal during the charge/discharge, each safety valve began start and is used for releasing the gas into blast pipe (gaseous emission pipeline) by gas vent.Afterwards, gas is discharged to the battery pack outside by blast pipe (gaseous emission pipeline) and outside exhaust portion.Like this, the gas that discharges by each safety valve all is collected so that be discharged to the outside together, thereby improves safety measure, for example, prevents gas ignition.
Patent documentation 1: TOHKEMY 2001-110377 communique.
Summary of the invention
The technical problem to be solved in the present invention
Yet as mentioned above, in order to be connected between blast pipe and the safety valve, in the conventional batteries group, each monocell all is equipped with outlet connecting portion, T junction etc.This will cause high manufacturing cost.In addition, the connection mouth of pipe of described connecting portion, joint etc. is easy to cause gas leakage.
Consider that these situations make the present invention, the present invention relates in each monocell, be equipped with the battery module of safety valve, particularly, an object of the present invention is to provide the battery pack cheaply that to avoid gas leakage, the battery pack that comprises described battery module and method for producing battery module.
To achieve these goals, the invention provides a kind of battery module, it comprises a plurality of monocells, in the described monocell each all is provided with safety valve on the safety valve assembly wall of monocell shell, be arranged such that comprising the described a plurality of monocells in described battery module described safety valve assembly wall is along same direction orientation, and described battery module also comprises: the air flue parts, these air flue parts cover all described safety valves that are included in the described a plurality of monocells in the described battery module, form the gas drain passageway thus between described air flue parts and described safety valve assembly wall; And be used for the seal member (portion's material) that between each monocell shell and described air flue parts, seals airtightly at least.
In the conventional batteries group, as mentioned above, be formed for allowing the gas drain passageway of hydrogen by safety valve release by connection spout that is connected in safety valve and the blast pipe that is connected in this spout.
On the other hand, in battery module of the present invention, between being included in the safety valve assembly wall of the air flue of all safety valves of the monocell in the battery module and each monocell, covering is formed with the gas drain passageway.Gap between each monocell shell and the air flue parts is sealed airtightly by seal member.By this structure, can eliminate needs for the connection mouth of pipe that conventionally invests each monocell.Therefore, can be low-cost and provide battery module with the reliability that strengthens.
Here, the shape of " monocell " is not concrete to be limited, and for example can be rectangle or columnar.In addition, " monocell shell " can be made by resin, metal, and perhaps part is divided into metal for resin portion.
The a plurality of monocells that are included in the battery module only need be configured to the safety valve assembly wall along same direction orientation.Can suitably select arrangement.For example, can arrange or arrange by row with vertical row and horizontal row (row in length and breadth).Owing to can effectively cool off each monocell, therefore preferred single-row layout.
" air flue parts " can be any structure that can cover all safety valves that are included in a plurality of monocells in the described battery module, thereby form the gas drain passageway between air flue parts and safety valve assembly wall.Its material and shape are not concrete to be limited.For example, the air flue parts can be resin, metal or pottery.Particularly, if the air flue parts are to be formed from a resin, it is suitable for realizing the loss of weight of battery module.The air flue parts only need cover all safety valves, to form the gas drain passageway between air flue parts and safety valve assembly wall.Therefore, needn't always cover whole safety valve assembly wall.It can be arranged to such an extent that cover the part of safety valve assembly wall.
" seal member " can be any structure, if its just between each monocell shell and air flue parts, seal airtightly at least can, and its material and shape can be not specifically limited.For example, sticker etc. or sheet adhesion zone or heat-shrinkable tube sealing by explanation after a while can be poured in the gap between each monocell shell and the air flue parts.
In addition, in aforementioned battery module, preferably, seal member is fixed in each monocell shell with the air flue parts.
According to the present invention, each monocell shell also is fixed in the air flue parts in the gap between seal member sealing air flue parts and each the monocell shell.Therefore will the air flue part bonding in each monocell shell.Therefore can low cost provide battery module.
In aforementioned any one battery module, preferably, seal member also seals the gap between the adjacent monocell shell airtightly.
When arranging a plurality of monocell simply, be easy between the adjacent single cells shell of monocell, produce the gap, this will cause the leakage by the hydrogen of safety valve discharge.Must prevent described gap in some modes; For example, by being bonded with each other, the monocell shell prevents described gap.
On the other hand, in the present invention, seal member even seal gap between the adjacent single cells shell airtightly.Be used to seal the seal member in gap between air flue parts and each the monocell shell by use, also can seal the gap between the monocell shell easy and inexpensively.
In aforementioned any one battery module, preferably, seal member comprises adhesion zone, and this adhesion zone adheres to into cross-over connection each monocell shell and described air flue parts at least, to seal between them.
According to the present invention, adhesion zone is as seal member and adhere to into each monocell shell of cross-over connection and air flue parts, to seal the gap between them.This can seal between each monocell shell and the air flue parts easy and inexpensively.In addition, use adhesion zone to help the fixing of air flue parts and monocell shell.
In aforementioned any one battery module, preferably, described seal member is a heat-shrinkable tube, and this heat-shrinkable tube surrounds (centering on) described monocell shell and described air flue parts and provide mutual press contacts between described monocell shell and described air flue parts in contraction state.
According to the present invention, heat-shrinkable tube is as seal member.Being in heat-shrinkable tube in the contraction state surrounds each monocell shell and air flue parts and holds them in the relation of mutual press contacts.By this structure, also can seal between monocell shell and the air flue parts easy and inexpensively.In addition, use heat-shrinkable tube to help fixing between air flue parts and the monocell shell.
In aforementioned any one battery module, preferably, being made of metal to small part of the shell surface of each monocell shell; Described seal member has electric insulating quality; And the part of metal at least that is included in the shell surface of a plurality of monocells in the battery module is covered by described seal member.
If the shell surface of monocell shell is made of metal and is exposed on the external, because the surface condensation meeting causes electric current to leak.
On the other hand, in the present invention, at least a portion on the shell surface of monocell shell is made of metal, and the metal at least on shell surface part is covered by the seal member with electric insulating quality.Therefore, does not expose the metal surface of monocell shell, thereby avoid safely because the electric current that surface condensation causes leaks.
In aforementioned any one battery module, preferably, it is 0.5mm or less than the sheet of 0.5mm that described seal member is thickness.
At seal member is in the situation of thicker sheet type, and the cooling characteristics of monocell (hot release characteristics) can reduce.More specifically, the thickness that surpasses the seal member of 0.5mm can have influence on cooling characteristics.
On the other hand, in the present invention, it is 0.5mm or less than the sheet of 0.5mm that seal member is formed thickness.Therefore, monocell can have sufficient cooling characteristics.
In aforementioned any one battery module, preferably, each monocell shell all is a rectangular shape, wherein said safety valve assembly wall is a rectangle, and is included in a plurality of monocells in the battery module and is arranged such that the minor face that includes the safety valve assembly wall and faces mutually perpendicular to each sidewall of safety valve assembly wall.
As mentioned above, can suitably select the arrangement of monocell; Yet some mode may reduce the cooling characteristics of monocell.
On the other hand, in the present invention, each monocell shell all is the rectangular shape with rectangle safety valve assembly wall.Monocell becomes row to arrange, so that include the minor face of safety valve assembly wall and be arranged in juxtaposition perpendicular to each sidewall of safety valve assembly wall.In this structure of the monocell that becomes row to arrange, narrow sidewall is faced mutually, and any monocell that is included in the same battery module can not exist along broad side walls, and each broad side walls all comprises the long limit of safety valve assembly wall and perpendicular to the safety valve assembly wall.This can cool off each monocell effectively by broad side walls.Therefore the cooling characteristics of each monocell can be further strengthened, and then the cooling characteristics of battery module can be further strengthened.
In addition, in one aspect of the method, the invention provides a kind of battery module, it comprises: the monocell group, wherein, a plurality of monocells that all are provided with safety valve in the safety valve assembly wall of monocell shell are configured in the row, make described safety valve assembly wall along same direction orientation; Air flue parts, this air flue arrangements of components to cover them, form the gas drain passageway thus between described air flue parts and described safety valve assembly wall on described monocell group's described safety valve; First side cover, this first side cover covers described monocell group and described air flue parts along monocell configuration direction from the one end; Second side cover, this second side cover covers described monocell group and described air flue parts along described monocell configuration direction from its other end, and has the gas discharge outlet that is communicated with described gas drain passageway; Seal member, the sealing arrangements of components is surrounded described monocell group and described air flue parts airtightly between described first side cover and described second side cover and with sleeve-shaped, described seal member comprises: be fixed in first open end that is positioned at an end place around described first side cover airtightly and be fixed in second open end that is positioned at other end place around described second side cover airtightly.
As mentioned above, up to now, being used to discharge from the gas drain passageway of safety valve escaping gas is to be formed by the connection mouth of pipe that is connected in safety valve and the blast pipe that is connected in this mouth of pipe.
On the other hand, in the present invention, the air flue parts of each safety valve by covering the monocell group form the gas drain passageway between the safety valve assembly wall of air flue parts and monocell.Second side cover is arranged on the end of monocell group and air flue parts along monocell configuration direction.In addition, the gas discharge outlet that is communicated with the gas drain passageway is formed in second side cover.Therefore, the gas that discharges by safety valve is discharged to module-external by gas discharge outlet.Therefore, can eliminate needs, and can form the gas drain passageway inexpensively for connection mouth of pipe that conventionally invests each monocell etc.
In addition, in the present invention, first side cover also is arranged on the other end of monocell group and air flue parts along monocell configuration direction.In addition, the sleeve-shaped seal member is located between first side cover and second side cover to surround described monocell group and described air flue parts airtightly.The sealing parts are fixed in first and second side covers respectively airtightly, so that its first open end surrounds first side cover airtightly and second open end surrounds second side cover.This structure makes can seal the entire cell module airtightly, prevents that the gas that discharges by safety valve from leaking from any part beyond the gas discharge outlet.In addition, this can prevent that electrolyte (even electrolyte leaks) from leaking into module-external from monocell.
Here, only " monocell group " need be configured such that the monocell that is included in wherein is configured in the row, wherein each safety valve assembly wall is along same direction orientation.Can suitably select connected mode etc.Term " monocell ", " monocell shell " and " air flue parts " are aforesaid.
" first side cover " only needs the end along monocell configuration direction from monocell group and air flue parts to cover them.Its material, shape and others are not concrete to be limited." second side cover " only needs the other end along monocell configuration direction from monocell group and air flue parts to cover them and comprise the gas discharge outlet that is communicated with the gas drain passageway.Its material, shape and others are not concrete to be limited.
" seal member " among the present invention only need satisfy the not concrete qualification of above-mentioned requirements and its material and others.Seal member is fixed in not concrete qualification of mode of first and second side covers.For example, can be by means of sticker, by welding (welding) or fixing by the combination execution of adhesion and welding.
In aforementioned battery module, preferably, first side cover, second side cover and seal member are formed from a resin respectively, and first open end of seal member is fixed in first side cover airtightly by welding; And second open end of seal member is fixed in second side cover airtightly by welding.
As mentioned above, seal member also can be fixed in first and second side covers by means of sticker as mentioned above.Yet, when electrolyte leaks from monocell and penetrates into described standing part, because electrolyte alkalescence normally, so sticker is easy to change quality, thus adhesion strength worsens.This can cause seal member strip off from first and second side covers.
On the other hand, in the present invention, the seal member and first and second side covers are formed from a resin, and seal member is fused to first and second side covers respectively.Therefore, even the electrolyte that leaks from monocell arrives the fixed part office, seal member also is not easy to strip off from first and second side covers, thereby realizes improved sealing characteristics.In addition, in the present invention, seal member only needs to be fixed airtightly by being fused to first and second side covers respectively.Can only it be fixed on the adhesion part airtightly by welding or auxiliary welding.
In aforementioned battery module, preferably, first open end of seal member is fused to first side cover under the situation that sticker is not set; And second open end of seal member is fused to second side cover under the situation that sticker is not set.
As mentioned above, can seal member be fixed in first and second side covers by the combination of adhesion and welding.Yet, can there be such a case, that is, owing to be present in the influence of the sticker of adhesion part, attempt auxiliary ground welding adhesive part branch causes the result of insufficient welding.
On the other hand, in the present invention, seal member is fused to first and second side covers under the situation that sticker is not set.Therefore can reliably seal member be fused to first and second side covers respectively, in those parts, have the enhanced seal characteristic.
In aforementioned battery module, preferably, described seal member is made by the rectangle sheet-like sealing material, this rectangle flaky sealing element is rolled into sleeve-shaped around described monocell group and described air flue parts, make first end along first edge with overlapped, and described first end and described the second end are fixing airtightly mutually along the second end at second edge relative with described first edge.
According to the present invention, seal member is made by the rectangle sheet-like sealing material, and this rectangle flaky sealing element is rolled into sleeve-shaped around monocell group and air flue parts, so that first end and the second end interfix airtightly.This structure can easily provide the sleeve-shaped seal member that surrounds monocell group and air flue parts airtightly.The mode of fixing first and second ends is not limited to this concrete mode.For example, can be by means of sticker, by welding or fixing by the combination execution of adhesion and welding.
In aforementioned battery module, preferably, described flaky sealing element is formed from a resin, and described seal member is arranged such that the described first end of described flaky sealing element and described the second end are fixing airtightly mutually by welding.
As mentioned above, also can fix first and second ends by means of sticker.Yet, if electrolyte leaks and penetrates into described standing part from monocell, because electrolyte alkalescence normally, so sticker is easy to change quality, thus adhesion strength worsens.This can cause the standing part strip off.
On the other hand, in the present invention, flaky sealing element is formed from a resin, and first and second ends are fixed by welding.Therefore, even when the electrolyte that leaks from monocell arrives the fixed part office, standing part also is not easy to strip off, thereby realizes improved sealing characteristics.In addition, in the present invention, first and second ends are only need be by welding fixing airtightly, and can be only by welding or auxiliaryly being fused to the adhesion part and fixing airtightly.
In aforementioned battery module, preferably, the first end of described seal member and the second end be welding mutually under the situation that sticker is not set.
As mentioned above, the first end of described seal member and the second end can be fixed by the combination of sticker and welding.Yet, can there be such a case, that is, owing to be present in the influence of the sticker in the adhesion part, attempt auxiliary ground welding adhesive part branch causes the result of insufficient welding.
On the other hand, in the present invention, first end and the second end are fixed under the situation that sticker is not set.Therefore can in this part, have further enhanced seal characteristic reliably with first end and the mutual welding of the second end.
In aforementioned any battery module, preferably, described seal member closely contacts with each monocell shell of monocell group.
According to the present invention, seal member closely contacts with each monocell shell of monocell group.The tight contact of this of seal member can prevent the faults such as damage such as seal member in the processing of battery module.In addition, thus can improve hot release characteristics and can effectively cool off each monocell.
In aforementioned any battery module, preferably, described seal member is not fixed in the first side cover sidepiece and the second side cover sidepiece of described air flue parts at least, the wherein said first side cover sidepiece extends in whole first preset range along described monocell configuration direction from described first side cover, and the described second side cover sidepiece extends in whole second preset range along described monocell configuration direction from described second side cover.
Consider that the air flue parts must be fixed in the monocell group reliably, therefore preferably be completely fixed seal member and air flue parts.Yet, for example, when the air flue parts are formed from a resin and monocell shell when being made of metal, wherein the thermal coefficient of expansion of air flue parts is greater than the thermal coefficient of expansion of monocell shell, therefore the downtake parts will shrink largely and the monocell shell will can so not shrink at low temperature (for example ,-40 ℃).Therefore, will can not produce the gap between first side cover and the monocell group and between second side cover and monocell group, and will produce the gap between first side cover and the air flue parts and between second side cover and air flue parts.Therefore, when seal member is completely fixed in the air flue parts, can be stretched with the part of the corresponding sheet component in gap, this is easy to form the crack in this part powerfully.Particularly, at low temperatures, seal member itself becomes hard, therefore is easy to break.
On the other hand, in the present invention, seal member is not fixed at least the first side cover sidepiece and the second side cover sidepiece of air flue parts.Particularly, at least the first side cover sidepiece and the second side cover sidepiece all allow to move freely under the situation that is not subjected to the seal member restriction.Therefore, even shrink at low temperatures when the air flue parts, thereby between air flue parts and first and second side covers, during the generation gap, can not bear so strong tensile stress with the part of the corresponding seal member in gap yet.Therefore, can prevent such as with the corresponding seal member in gap in produce fault such as crack.
In aforementioned any battery module, preferably, described seal member passes through along monocell configuration direction and is fixed in the air flue parts, and described air flue parts comprise a plurality of secondary air flue portion along the configuration of monocell configuration direction.
If seal member is fixed in the air flue parts from this end to that end, advantageously, the air flue parts can be fixed in the monocell group reliably.Yet, as mentioned above, if the thermal coefficient of expansion of air flue parts greater than the thermal coefficient of expansion of monocell shell, will produce the gap between first side cover and the air flue parts and between second side cover and air flue parts at low temperatures.Therefore, can be stretched with the part of the corresponding seal member in gap, this is easy to form crack etc. in this part powerfully.
On the other hand, in the present invention, the air flue parts comprise a plurality of secondary air flue portion of arranging along monocell configuration direction.Even when air flue parts at low temperatures during thermal contraction, this structure allows secondary air flue portion to shrink individually.Therefore, between secondary air flue portion and between the air flue parts and first or second side cover, produce the gap.This causes producing less gap between the air flue parts and first or second side cover.Therefore, can not bear so strong tensile stress with the part of the corresponding seal member in gap yet, therefore, can prevent such as with the corresponding seal member in this gap in produce fault such as crack.
In addition, in one aspect of the method, the invention provides a kind of battery pack, it comprises the one or more battery modules described in any one of the above-mentioned explanation.
As mentioned above, owing to comprise the inexpensive battery module that can prevent gas leakage and electrolyte leakage, so battery pack can be low-cost and high reliability.
In addition, in one aspect of the method, the invention provides a kind of method for producing battery module, it comprises that the rectangle flaky sealing element that will have first edge, second edge, the 3rd edge and the 4th edge reels to seal the sealing step of described battery module to be sealed airtightly around battery module to be sealed, described battery module to be sealed comprises: the monocell group, wherein, the a plurality of monocells that all are provided with safety valve in the safety valve assembly wall of monocell shell are configured in the row, make described safety valve assembly wall along same direction orientation; Air flue parts, this air flue arrangements of components to cover them, form the gas drain passageway thus between described air flue parts and described safety valve assembly wall on described monocell group's described safety valve; First side cover, this first side cover covers described monocell group and described air flue parts along monocell configuration direction from one end (distolateral); Second side cover, this second side cover covers described monocell group and described air flue parts along described monocell configuration direction from its other end (distolateral), and has the gas discharge outlet that is communicated with described gas drain passageway; And wherein, described sealing step comprises: arrange described flaky sealing element, make described first edge and described second edge extend along described monocell configuration direction; Described flaky sealing element is reeled around described battery module to be sealed, make the second end along described second edge from the outside with overlapping along the first end at described first edge, surround described first side cover simultaneously along the 3rd end at described the 3rd edge and surround described second side cover along the 4th end at described the 4th edge; Described the second end is fixed in described first end airtightly, thereby described flaky sealing element is formed sleeve-shaped; Described the 3rd end is fixed in described first side cover airtightly; And described the 4th end is fixed in described second side cover airtightly.
The air flue parts that the battery module of method constructed in accordance is configured to each safety valve of clad battery group form the gas drain passageway between the safety valve assembly wall of air flue parts and each monocell.In addition, second side cover is arranged in the end of battery pack and air flue parts and is formed with the gas discharge outlet that is communicated with the gas drain passageway along monocell configuration direction, thereby will be discharged to module-external through the gas that safety valve discharges via gas discharge outlet.In addition, the rectangle flaky sealing element is reeled around the battery module to be sealed, and first side cover of described battery module to be sealed is arranged in the other end of battery group and air flue parts along monocell configuration direction, thus gas-tight seal entire cell module.
In the present invention, for described battery module, as following, carry out the encapsulation process (technology) that is used for the rectangle flaky sealing element is sealed in battery module to be sealed.Particularly, flaky sealing element is provided with to such an extent that its first edge and second edge are extended along monocell configuration direction.This flaky sealing element is reeled around battery module to be sealed, so that the second end is overlapping from the outside and first end, the 3rd end surrounds first side cover and the 4th end surrounds second side cover.Afterwards, the second end is fixed in first end airtightly, so that flaky sealing element is formed sleeve-shaped, the 3rd end is fixed in first side cover airtightly, and the 4th end is fixed in second side cover airtightly.Because aforesaid use rectangle flaky sealing element is carried out sealing, so the module of gas-tight seal entire cell easily.
In addition, in the aforementioned battery module manufacture method, preferably, described flaky sealing element is comprehensive adhesion flaky sealing element that whole surface all is coated with sticker, and described sealing step comprises: by adhesion described the second end is fixed in described first end airtightly; By adhesion described the 3rd end is fixed in described first side cover airtightly; And by the adhesion described the 4th end is fixed in described second side cover airtightly.
According to the present invention, whole surface all is coated with comprehensive adhesion flaky sealing element of sticker as flaky sealing element.In encapsulation process, the second end is fixed in airtightly by adhesion, and first side cover is fixed in airtightly by adhering in first end, the 3rd end, second side cover is fixed in airtightly by adhering in the 4th end.Utilize described comprehensive adhesion flaky sealing element, the described expectation part of gas-tight seal easily when seal member invests the expectation part simply.
In addition, in the aforementioned battery module manufacture method, preferably, described flaky sealing element is formed from a resin, described the second end is included between described the 3rd edge and described the 4th edge and extends and the uncoated second non-bonding region that sticker is arranged, and described sealing step comprises by welding the described second non-bonding region of described the second end is fixed in described first end airtightly.
As mentioned above, consider the battery module finished sealing characteristics, more preferably, the first end of flaky sealing element is fixed in the second end by welding rather than by sticker with respect to electrolyte.Yet owing to be present in the influence of the sticker in the adhesion part, welding adhesion part in auxiliary ground can cause inadequate welding result.
On the other hand, the flaky sealing element that uses among the present invention has the uncoated second non-bonding region that sticker is arranged and extend to the 4th edge from the 3rd edge in the second end.In encapsulation process, this second non-bonding region is fixed in first end airtightly by welding.Like this, second of the second end non-bonding region and first end can only not be provided with under the situation of sticker fixing airtightly by welding.Therefore, second of the second end non-bonding region and first end can interfix reliably.
In addition, in the aforementioned battery module manufacture method, preferably, described flaky sealing element comprises second bonding region that is coated with sticker than more close described second edge of the described second non-bonding region in described the second end, and described sealing step comprises by adhesion described second bonding region of described the second end is temporarily fixed on described first end that the described second non-bonding region with described the second end is fused to described first end afterwards.
The flaky sealing element that uses among the present invention has second bonding region that is coated with sticker than more close second edge of the second non-bonding region in the second end.In encapsulation process, second bonding region of the second end invests first end, so that temporarily second bonding region of the second end is fixed in first end, the second non-bonding region with the second end is fused to first end afterwards.In the present invention, because second bonding region of the second end invests first end and is temporarily fixed on first end, as mentioned above, thus this second non-bonding region that helps the second end in the welding with respect to the location of first end and easily be located in position and locate.
In addition, in aforementioned any method for producing battery module, preferably, described flaky sealing element is formed from a resin, described the 3rd end is included in uncoated the 3rd non-bonding region that sticker is arranged that extends between described first edge and described second edge, and described the 4th end is included in uncoated the 4th non-bonding region that sticker is arranged that extends between described first edge and described second edge; And described sealing step also comprises by welding the described the 3rd non-bonding region of described the 3rd end is fixed in described first side cover airtightly, and by welding the described the 4th non-bonding region of described the 4th end is fixed in described second side cover airtightly.
As mentioned above, consider the battery module finished sealing characteristics, more preferably, flaky sealing element is fixed in first and second side covers by welding rather than by sticker with respect to electrolyte.Yet owing to be present in the influence of the sticker in the adhesion part, welding adhesion part in auxiliary ground can cause inadequate welding result.
On the other hand, the flaky sealing element that uses among the present invention has uncoated the 3rd non-bonding region that sticker is arranged and extend to second edge from first edge in the 3rd end, and also has uncoated the 4th non-bonding region that sticker is arranged and extend to second edge from first edge in the 4th end.In encapsulation process, the 3rd non-bonding region is fixed in first side cover airtightly and by welding the 4th non-bonding region is fixed in second side cover airtightly by welding.Like this, the 4th non-bonding region of the 3rd of the 3rd end the non-bonding region and first side cover and the 4th end and second side cover can only not be provided with by welding under the situation of sticker and interfix airtightly.Therefore, the 3rd non-bonding region and first side cover of the 3rd end can be fixed reliably, and the 4th non-bonding region of the 4th end and second side cover are fixing reliably.
Description of drawings
Fig. 1 is the perspective view of battery pack among first embodiment;
Fig. 2 is the perspective view that the battery module of battery pack among first embodiment is shown;
Fig. 3 is the battery module partial section along the longitudinal direction that constitutes battery pack among first embodiment;
Fig. 4 is the sectional view of battery pack among first embodiment that cut of the line A-A along Fig. 3;
Fig. 5 is the sectional view of battery pack among first embodiment that cut of the line B-B along Fig. 3;
Fig. 6 is the sectional view of battery pack among first embodiment that cut of the line C-C along Fig. 3;
Fig. 7 be with first embodiment in the sectional view of the part of battery pack among corresponding second embodiment of Fig. 4;
Fig. 8 is the perspective view of battery module among the 3rd embodiment;
Fig. 9 is the vertical view of battery module the 3rd embodiment when second long sidewall one side is seen;
Figure 10 is the vertical view of battery module the 3rd embodiment when first end wall, one side is seen;
Figure 11 is the vertical view of battery module the 3rd embodiment when second end wall, one side is seen;
Figure 12 is the vertical view of battery module the 3rd embodiment when first short sidewall one side is seen;
Figure 13 is the partial section of battery module among the 3rd embodiment;
Figure 14 is the explanatory diagram that the flaky sealing element that the manufacturing of battery module among the 3rd embodiment will use is shown;
Figure 15 is the explanatory diagram that the flaky sealing element that the manufacturing of battery module among the 4th embodiment will use is shown;
Figure 16 is the explanatory diagram that the flaky sealing element that the manufacturing of battery module among the 5th embodiment will use is shown;
Figure 17 is the perspective view of battery module among the 6th embodiment;
Figure 18 is the perspective view of the maintenance dividing plate (spacer) of battery pack among the 7th embodiment;
Figure 19 is the perspective view of battery pack among the 7th embodiment, battery module is shown is installed in the structure that keeps in the dividing plate; And
Figure 20 is the explanatory diagram that battery pack among the 7th embodiment is shown.
Reference numeral
100 battery pack
110 battery modules
120 monocells
121 monocell shells
121a (the monocell shell) roof (safety valve assembly wall)
121b (the monocell shell) diapire
121c, 121d (the monocell shell) the first side wall
121e, 121f (the monocell shell) second sidewall
130 air flue parts
131 gas drain passageways
160,260 seal members
300 battery modules
310 battery group
311 monocells
313 monocell shells
313c the 3rd wall (safety valve assembly wall)
315 safety valves
330,630 air flue parts
331 gas drain passageways
333 positive electrode side cover side ends
335 negative electrode side cover side ends
340 positive electrode side covers (first side cover)
350 negative electrode side covers (second side cover)
353 gas discharge outlets
360,460,560 seal members
360p, 460p, 560p first open end
360q, 460q, 560q second open end
361,461,561 flaky sealing elements
361a, 461a, 561a first edge
361b, 461b, 561b second edge
361c, 461c, 561c the 3rd edge
361d, 461d, 561d the 4th edge
363,463,563 first ends
365,465,565 the second ends
367,467,567 the 3rd ends
369,469,569 the 4th ends
365h, the 465h second non-bonding region
366,466 second bonding regions
367h, 467h the 3rd non-bonding region
369h, 469h the 4th non-bonding region
The 563h first non-bonding region
564 first bonding regions
The secondary air flue of 630p portion
700 battery pack
G1 first preset range
G2 second preset range
Embodiment
Below preferred embodiments of the present invention will be described.
(first embodiment)
Fig. 1 is the perspective view of battery pack 100 among first embodiment; Fig. 2 is the perspective view that the battery module 110 that constitutes battery pack 100 is shown; Fig. 3 is the partial section of battery module 110 along the longitudinal direction; Fig. 4 is the sectional view that the line A-A along Fig. 3 is cut; Fig. 5 is the sectional view that B-B along the line cuts; And Fig. 6 is the sectional view that C-C along the line cuts.
Battery pack 100 is to be used as the secondary cell of the power source of motor vehicle and motor vehicle driven by mixed power.Battery pack 100 comprises a plurality of (among Fig. 1 being 6) battery module 110.The module positive terminal 151 of a battery module 110 and the module negative terminal 152 of adjacent battery modules 110 (leaving the minim gap that is used for cool batteries between them) are connected by bus (bus-bar) 101, so that adjacent battery modules 110 interfixes (seeing Fig. 1 and Fig. 6).
Each battery module 110 that constitutes battery pack 100 all is (the seeing Fig. 1 and Fig. 2) of rectangular shape.The air flue parts 130 of roof (safety valve assembly wall) 121a that battery module 110 comprises a plurality of monocells 120 of being connected in series, cover each monocell 120, cover side cover 140, module positive terminal 151 and the module negative terminal 152 of the sidewall (the first side wall 121c and 121d) that is arranged in the place, two ends, and the seal member 160 (seeing Fig. 1 to Fig. 6) of clad battery module 110 almost completely.
Each monocell 120 all is the secondary cell of sealing.Monocell 120 comprises monocell shell 121, safety valve 123 (its internal structure is not shown), monocell positive terminal 125, monocell negative terminal 126, and is contained in the generating element (not shown) (seeing Fig. 3 to Fig. 6) in the monocell shell 121.Each monocell 120 also all is perfused with electrolyte.
Each monocell shell 121 all is also being made of metal fully of rectangular shape.Monocell shell 121 comprises: rectangular top wall (safety valve assembly wall) 121a; With the corresponding diapire 121b of roof 121a; Two the first side wall 121c and 121d all have the narrow zone of the minor face of the minor face that engages roof 121a and diapire 121b; And two second sidewall 121e and 121f, all have the wide zone on the long limit of the long limit that engages roof 121a and diapire 121b.
In two the first side wall 121c and 121d, a first side wall 121c (the left wall among Fig. 3) is equipped with monocell positive terminal 125 and another the first side wall 121d (the right wall among Fig. 3) is equipped with monocell negative terminal 126.The monocell positive terminal 125 of adjacent single cells 120 and monocell negative terminal 126 are electrically connected by clamped nipple 127.Be positioned at the battery module 110 1 ends (front end among Fig. 2, the monocell positive terminal 125 of the monocell of the left end among Fig. 3) locating 120 is electrically connected with module positive terminal 151, and the monocell negative terminal 126 that is positioned at the monocell 120 that the other end (rear end among Fig. 2) locates is electrically connected with module negative terminal 152.
Generating element comprises a plurality of positive plates and a plurality of negative plate, and is alternately laminated in the mode that is provided with cushion block between them.The positive electrode that is made of a plurality of positive plates is electrically connected on monocell positive terminal 125, and the negative electrode that is made of a plurality of negative plates is electrically connected on monocell negative terminal 126.
The a plurality of monocells 120 that constitute battery module 110 are set to and make each roof 121a along same direction orientation.Monocell 120 also is arranged to row, so that the first side wall 121c and the 121d of adjacent single cells 120 face mutually, and second sidewall 121e of each monocell 120 and 121f are towards outer (see figure 3).
Cover at two ends among the side cover 140 of the first side wall 121c of monocell 120 and 121d, side cover 140 (that of front among Fig. 2, that of the left side among Fig. 3) contacts with the first side wall 121c of location monocell 120 at one end almost completely to cover the first side wall 121c and to be against relation with an end of air flue parts 130.In addition, another side cover 140 (among Fig. 2 back that) contacts with the first side wall 121d of the monocell 120 that is positioned at other end place almost completely to cover the first side wall 121d and to be against relation with the other end of air flue parts 130.The same with air flue parts 130, side cover 140 is by making such as the resin of polypropylene (PP).In center upper portion, each side cover 140 all is equipped with cylindrical shape exhaust portion 141 integratedly, and this cylindrical shape exhaust portion 141 is formed with gas discharge outlet 141k.Gas discharge outlet 141k and the roof 121a that is formed on each monocell 120 are communicated with gas drain passageway 131 between the air flue parts 130, thereby allow hydrogen (if discharging from each monocell 120) to be discharged to the outside (outside of battery pack) of battery module by this gas discharge outlet 141k.
Make battery pack 100 in such a way, promptly, monocell 120 (each monocell is all made by known technology) is arranged to row, during air flue parts 130 and side cover 140 are provided with in position with respect to monocell 120, seal member 160 is thereon attached, thereby constitutes battery module 110.Afterwards, connect battery module 110 securely, thereby finish battery pack 100 by bus 101.
In this battery pack 100, gas drain passageway 131 is formed between the air flue parts 130 of roof (safety valve assembly wall) 121a of each monocell 120 and all safety valves 123 that covering is included in the monocell 120 in the battery module 110.The all sealed parts 160 in gap between each monocell shell 121 and the air flue parts 130 seal airtightly.Therefore, eliminate the needs that invest the connection mouth of pipe of each monocell for routine, thereby can low-costly obtain inexpensive battery module 110 and battery pack 100.
In addition, in first embodiment, monocell shell 121 is fixed in air flue parts 130 simultaneously in the gap between seal member 160 sealing air flue parts 130 and each monocell shell 121.Therefore, need not to be used for air flue parts 130 are engaged or are adhered to the auxiliary operation of monocell shell 121.
In addition, seal member 160 seals the gap between the adjacent single cells shell 121 airtightly.Do not need by engaging or bonding gap of filling between the monocell shell 121.
In first embodiment, monocell shell 121 is metal, and seal member 160 is the electric insulation adhesion zones that cover the metal surface (shell surface) of each monocell shell 121.Therefore, the metal surface of each monocell shell 121 is not exposed to the outside of battery pack, and this can prevent reliably because the electric current that surface condensation causes leaks.
In first embodiment, seal member 160 thickness are 0.5mm or less than the sheet of 0.5mm, this can guarantee the cooling characteristics of monocell 120 fully.
In first embodiment, roof (safety valve assembly wall) 121a and monocell 120 that each monocell shell 121 all has rectangular shape are arranged in the row so that the first side wall 121c and 121d face mutually.Therefore, any monocell 120 that belongs to same battery module 110 can not exist along the second sidewall 121e and 121f.Therefore, each monocell 120 all can be cooled off effectively by the second sidewall 121e and the 121f with wide region, therefore can strengthen the cooling characteristics of monocell 120 or battery pack 100.
(second embodiment)
Below second embodiment will be described.For with first embodiment in the explanation of identical parts be omitted or simplify.
Fig. 7 be to first embodiment in the similar sectional view of Fig. 4.Battery pack among second embodiment is that battery pack 100 among first embodiment that is made by adhesion zone is different with seal member 160 wherein aspect the seal member of being made by heat-shrinkable tube 260, others all with first embodiment in identical.The seal member 260 that is in contraction state surrounds monocell shell 121 and air flue parts 130 fully with sleeve-shaped and each monocell shell 121 and air flue parts 130 is all remained the relation of mutual press contacts.By this structure, also can seal between each monocell shell 121 and the air flue parts 130 easy and inexpensively.Air flue parts 130 also can easily be fixed in monocell shell 121.
As for remainder, to those similar parts among first embodiment have to first embodiment in similar operation and effect.
(the 3rd embodiment)
Below the 3rd embodiment will be described.Fig. 8 to Figure 13 is the battery module 300 among the 3rd embodiment.Figure 14 illustrates the flaky sealing element 361 that the manufacturing of battery module 300 will be used.Battery pack 300 is to be used as the secondary cell (for example, nickel metal hydride batteries) of the power source of motor vehicle and motor vehicle driven by mixed power.Battery module 300 is to be close to rectangular shape, has the first relative long sidewall 300a and lacks sidewall 300d and the relative first end wall 300e and the second end wall 300f with the second long sidewall 300b, the relative first short sidewall 300c and second.
Each monocell shell 313 all is also being made of metal fully of rectangular shape.This monocell shell 313 comprises: opposite first walls 313a and the second wall 313b (seeing Fig. 8 and Fig. 9) with maximum region; Relative the 3rd wall (safety valve assembly wall) 313c and wall 313d all engage the minor face of first wall 313a and the minor face (seeing Figure 13) of the second wall 313b; And the 5th relative wall 313e and the 6th wall 313f, all engage the long limit of first wall 313a and the long limit (seeing Figure 13) of the second wall 313b.
Among them, the 3rd wall (safety valve assembly wall) 313c is equipped with safety valve 315 (seeing Figure 13) approaching its centre.This safety valve 315 is configured so that to begin start when causing the internal pressure of monocell 311 to surpass predeterminated level owing to the hydrogen that produces during the charge/discharge, thereby hydrogen is discharged into the monocell outside.
The 5th wall 313e is formed with two the monocell positive terminals 317 (seeing Figure 13) that are spaced apart of each other at a certain distance.The 6th wall 313f almost all is equipped with monocell negative terminal 319.The monocell positive terminal 317 of a monocell 311 and the monocell negative terminal 319 of adjacent single cells 311 interfix so that be electrically connected by welding.The module positive terminal 341 of monocell positive terminal 317 (that on the right of among Figure 13) in the inside of module with explanation after a while that is positioned at the monocell 311 at battery group 310 1 end places along monocell configuration direction is electrically connected.On the other hand, be positioned at other end place monocell (left side among Figure 13) 311 monocell negative terminal 319 the inside of module with after a while the explanation module negative terminal 351 be electrically connected.
Generating element comprises a plurality of positive plates and a plurality of negative plate, and is alternately laminated in the mode that is provided with cushion block between them.The positive electrode that is made of a plurality of positive plates is electrically connected on the monocell positive terminal 317 in the monocell, and the negative electrode that is made of a plurality of negative plates is electrically connected on the monocell negative terminal 319 in the monocell.
Positive electrode side cover 340 is sentenced along monocell configuration direction from end covering them along the end (right-hand member among Figure 13) that monocell configuration direction is arranged in battery group 310 and air flue parts 330.Contact with the 5th wall 313e of the monocell 311 at an end place that is positioned at battery group 310 and the air flue parts 330 described end of the almost whole surface and airway parts 330 that cover the 5th wall 313e simultaneously of positive electrode side cover 340.
The same with air flue parts 330, positive electrode side cover 340 is by making such as the resin of polypropylene (PP).In the central authorities substantially of positive electrode side cover 140, cylindrical module positive terminal 341 is provided with to such an extent that be projected into the outside of module securely.In inside modules, this module positive terminal 341 is electrically connected on the monocell positive terminal 317 of the monocell 311 that is positioned at battery group 310 1 end places as mentioned above.
In addition, locating along the battery group 310 of monocell configuration direction and the other end (left end among Figure 13) of air flue parts 330, negative electrode side cover 350 is arranged to such an extent that cover them along monocell configuration direction from the described other end.Contact with the 6th wall 313f of the monocell 311 at the other end place that is positioned at battery group 310 and air flue parts 330 other end of the almost whole surface and airway parts 330 that cover the 6th wall 313f simultaneously of negative electrode side cover 350.
The same with air flue parts 330, negative electrode side cover 350 also is by making such as the resin of polypropylene (PP).In the central authorities substantially of negative electrode side cover 350, cylindrical module negative terminal 351 is provided with to such an extent that be projected into the outside of module securely.In inside modules, this module negative terminal 351 is electrically connected on the monocell negative terminal 319 of the monocell 311 that is positioned at battery group 310 other end places as mentioned above.Cylindrical shape exhaust outlet 353 is formed on the center upper portion of negative electrode side cover 350.This exhaust outlet 353 is communicated with gas drain passageway 331 between the safety valve assembly wall 313c that is formed on air flue parts 330 and battery group 310, allows hydrogen (if discharging from each monocell 311) to be discharged to the outside of module by this exhaust outlet 353.
In the 3rd embodiment, as mentioned above, air flue parts 330 are arranged to form gas drain passageway 331 between air flue parts 330 and safety valve assembly wall 313c.In addition, the negative electrode side cover 350 with the exhaust outlet 353 that is communicated with gas drain passageway 331 is configured to by it hydrogen is discharged to module-external.Therefore, compare with regular situation, can be more easily and more inexpensively be formed for the exhaust channel of hydrogen.
Resin-sealed parts 360 with electric insulating quality are arranged between positive electrode side cover 340 and the negative electrode side cover 350 (seeing Fig. 8 to Figure 13).Seal member 360 is the sleeve-shaped of reeling around battery group 310 and air flue parts 330 about along the axis of monocell configuration direction.The first open end 360p at one end place is fixed in around the positive electrode side cover 340 airtightly by adhesion.The second open end 360q at other end place surrounds negative electrode side cover 350 and is fixed in negative electrode side cover 350 airtightly by adhesion.Under the situation that is coated with sticker on the total inner surface, seal member 360 also is attached to such an extent that closely contact with air flue parts 330 with each monocell shell 313 of battery group 310.
By resin-sealed parts 360, battery module 300 is by gas-tight seal fully.This can prevent to leak into the outside by the hydrogen that safety valve 315 discharges by any part except that exhaust outlet 353.Even when electrolyte leaks into module-external from each monocell 311, can prevent that also electrolyte leakage from arriving the outside of module.In addition, because seal member 360 is attached to such an extent that closely contact with each monocell shell 313 of battery group 310, therefore also can avoid damage or other fault of seal member 360 when treatment of battery module 300.Seal member 360 invests monocell shell 313 securely, thereby strengthens the hot release characteristics of each monocell 311, thereby cools off each monocell 311 effectively.
Similar, sticker is coated on along the 3rd edge 361c and is provided with so that be fixed in band shape the 3rd end 367 around the positive electrode side cover 340 and be provided with so that be fixed in band shape the 4th end 369 around the negative electrode side cover 350 along the 4th edge 361d.The 3rd end 367 of flaky sealing element 361 is corresponding with the first open end 360p of seal member 360.The 4th end 369 of flaky sealing element 361 is corresponding with the second open end 360q of seal member 360.
Below will be to the manufacture method of above-mentioned battery module 300 make an explanation (seeing Fig. 8 to 14).
At first, the monocell 311 by the known technology manufacturing is connected in series and the Cheng Yilie layout formation battery group 310.Air flue parts 330, positive electrode side cover 340 and negative electrode side cover 350 are disposed in each appropriate location of battery group 310.Battery module in this state is equivalent to battery module to be sealed of the present invention.
The second, in encapsulation process, aforementioned flaky sealing element 361 is wound on this battery module to be sealed with gas-tight seal battery module 300.More specifically, flaky sealing element 361 being configured to its first edge 361a and the second edge 361b extends along monocell configuration direction.Afterwards, the first end 363 of flaky sealing element 361 is invested the upper surface (seeing flaky sealing element schematically illustrated among Figure 10 361 and other parts) of the air flue parts 330 of battery module to be sealed.
Afterwards, flaky sealing element 361 is attached to battery module to be sealed, and the while is wound on around the module about the axis along monocell configuration direction.Because the flaky sealing element 361 among the 3rd embodiment is the flaky sealing elements of adhering comprehensively, so the 3rd end 367 of flaky sealing element 361 is adhered to positive electrode side cover 340 around being wound on positive electrode side cover 340 simultaneously.The 4th end 369 is adhered to negative electrode side cover 350 around being wound on negative electrode side cover 350 simultaneously.In addition, flaky sealing element 361 also is attached to each the monocell shell 313 and the air flue parts 330 of battery group 310.At last, the second end 365 of flaky sealing element 361 invests first end 363 from the outside.
When flaky sealing element 361 invests battery module to be sealed as mentioned above like that, the first end 363 of flaky sealing element 361 and the second end 365 interfix with sleeve-shaped airtightly by adhesion.Positive electrode side cover 340 is fixed in airtightly by adhesion in the 3rd end 367 of flaky sealing element 361.Negative electrode side cover 350 is fixed in airtightly by adhesion in the 4th end 369 of flaky sealing element 361.In addition, flaky sealing element 361 is attached to such an extent that closely contact with air flue parts 330 with each monocell shell 313 of battery group 310 by adhesion.Like this, finished battery module 300.
Use the above-mentioned sealing of flaky sealing element 361 to allow entire cell module 300 easily to be hermetically sealed.In addition, in the 3rd embodiment, the flaky sealing element of comprehensively adhering is used for flaky sealing element 361.The sealing parts only need invest module 300 with the gas-tight seal predetermined portions.
(the 4th embodiment)
Below the 4th embodiment will be described.Omit or simplify to the 3rd embodiment in the explanation of similar part.
In the 4th embodiment, the flaky sealing element 461 of formation seal member 460 is different from the flaky sealing element 361 among aforementioned the 3rd embodiment.Other parts substantially to the 3rd embodiment in similar.Figure 15 illustrates to be used in the flaky sealing element in the battery module 461 among the 4th embodiment.
This flaky sealing element 461 is the rectangular shapes with the first relative edge 461a and the second edge 461b and relative the 3rd edge 461c and the 4th edge 461d.This flaky sealing element 461 also is the plate that has about 100 μ m thickness and be coated with sticker, but its part comprises the uncoated zone that sticker is arranged, and this is different from the 3rd embodiment.
Particularly, the same with the banded first end 363 of flaky sealing element among the 3rd embodiment, the banded first end 363 that is provided with and waits to be arranged in along the first edge 461a on the upper surface of air flue parts 330 is coated with sticker.
On the other hand, be provided with and wait to be arranged on the upper surface of air flue parts 330 along the second edge 461b and the banded the second end 465 that overlaps on the first end 463 from the outside comprises the second non-bonding region 465h that is not coated with sticker, extend between the 3rd edge 461c and the 4th edge 461d in this zone.In the second end 365, more be close to the second edge 461b than the second non-bonding region 465h, be formed with band shape second bonding region 466 that is coated with sticker.
Along the 3rd edge 461c be provided with and to be spooled around positive electrode side cover 340 and band shape the 3rd end 467 of being fixed in positive electrode side cover 340 comprise the 3rd non-bonding region 467h that is not coated with sticker, extend between the first edge 461a and the second edge 461b in this zone.In addition, along the 4th edge 461d be provided with and to be spooled around negative electrode side cover 350 and band shape the 4th end 469 of being fixed in negative electrode side cover 350 comprise the 4th non-bonding region 469h that is not coated with sticker, extend between the first edge 461a and the second edge 461b in this zone.Remainder is coated with sticker.
In the 4th embodiment, form seal member 460 by this way, that is, make this flaky sealing element 461 be wound on around the battery module to be sealed so that the second end 465 is overlapping with first end 463, and they by welding with sleeve-shaped interfix (seeing Fig. 8 to Figure 13).More specifically, in the second end 465, the second non-bonding region 465h that is not coated with sticker overlaps on the first end 463 and under the situation that sticker is not set from the outside and is fixed thereon by welding.
In the 3rd embodiment, the first end 363 of flaky sealing element 361 and the second end 365 interfix by using sticker.Yet, if electrolyte leaks from each monocell 311, penetrate in this standing part, because electrolyte is alkaline, so the quality of sticker is easy to change, thus adhesion strength worsens.This can cause the standing part strip off.
On the other hand, in the 4th embodiment, the first end 463 of flaky sealing element 461 and the second end 465 interfix by welding.Even when the electrolyte that has leaked from each monocell 311 arrived standing part, standing part was not easy to strip off, thereby realizes improved sealing characteristics therefore.And the second non-bonding region 465h of first end 463 and the second end 465 is welding mutually under the situation that sticker is not set.Owing to can carry out this welding reliably, therefore can especially improve the sealing characteristics in this standing part.
In the 4th embodiment, the 3rd end 467 of flaky sealing element 461 (the 3rd non-bonding region 467h) forms the first open end 460p of seal member 460, and it surrounds positive electrode side cover 340 and by the airtight positive electrode side cover 340 that is fixed in of welding under the situation that sticker is not set.The 4th end 469 (the 4th non-bonding region 469h) forms the second open end 460q of seal member 460, and it surrounds negative electrode side cover 350 and by the airtight negative electrode side cover 350 that is fixed in of welding under the situation that sticker is not set.
In the 3rd embodiment, seal member 360 uses sticker to be fixed in positive electrode side cover 340 and negative electrode side cover 350.Yet as mentioned above, even when electrolyte leaked from each monocell 311 and penetrates in this standing part, the quality of sticker was easy to change, thereby adhesion strength worsens, and this can cause the standing part strip off.
On the other hand, in the 4th embodiment, seal member 460 is fixed in positive electrode side cover 340 and negative electrode side cover 350 by welding.Therefore, even when the electrolyte that has leaked from each monocell 311 arrived standing part, seal member 460 was not easy to strip off, and this has realized improved sealing characteristics.And seal member 460 is fused to positive electrode side cover 340 and negative electrode side cover 350 under the situation that sticker is not set.Owing to can carry out this welding reliably, therefore can especially improve the sealing characteristics in this standing part.
To make an explanation to the manufacture method of the battery module among the 4th embodiment below (seeing Figure 10 and other figure).At first, with the 3rd embodiment in identical mode make battery module to be sealed.Afterwards, in encapsulation process, flaky sealing element 461 is wound in battery module to be sealed with the gas-tight seal battery module.Particularly, flaky sealing element 461 being configured to its first edge 461a and the second edge 461b extends along monocell configuration direction.Afterwards, the first end 463 of flaky sealing element 461 is invested the upper surface of air flue parts 330.Afterwards, flaky sealing element 461 is wound on around the battery module to be sealed about the axis along monocell configuration direction, is adhered to this module simultaneously.
At this moment, as among the 3rd embodiment, flaky sealing element 461 invests each the monocell shell 313 and the air flue parts 330 of battery group 310.In the 4th embodiment, the 3rd end 467 of flaky sealing element 461 forms the 3rd non-bonding region 467h that is not coated with sticker.Therefore, the 3rd end 467 still is not adhered to positive electrode side cover 340 around being wound on positive electrode side cover 340.The 4th end 469 also forms the 4th non-bonding region 469h that is not coated with sticker.Therefore, the 4th end 469 still is not adhered to negative electrode side cover 350 around being wound on negative electrode side cover 350.Afterwards, the second end 365 of flaky sealing element 461 overlaps on the first end 463 from the outside, and second bonding region 466 of the second end 465 is attached to first end 463 so that temporary fixed.
Subsequently, second of the second end 465 non-bonding region 465h is fixed in first end 463 airtightly by welding.The 3rd end 467 (the 3rd non-bonding region 467h) is fixed in positive electrode side cover 340 airtightly by welding and the 4th end 469 (the 4th non-bonding region 469h) is fixed in negative electrode side cover 350 airtightly by welding.Therefore, finished battery module among the 4th embodiment.
In the 4th embodiment, as mentioned above, form that its second end 465 of the second non-bonding region 465h is uncoated to have the seal member of sticker as flaky sealing element 461.In addition, in encapsulation process, the second non-bonding region 465h is fixed in first end 463 airtightly by welding.Therefore, second of the second end 465 non-bonding region 465h and first end 463 can only need not to be provided with sticker by welding and interfix.Therefore, the second end 465 and first end 463 can interfix securely.
And, flaky sealing element 461 comprises second bonding region 466 that is coated with sticker so that this second bonding region 466 invests first end 463 in the second end 465, so that the second non-bonding region 465h of the second end 465 is fused to first end 463 after temporary fixed in encapsulation process.Therefore, second of the second end 465 non-bonding region 465h easily is arranged in the position that is used for welding and the suitable part of welding reliably.
And the 3rd non-bonding region 467h and the 4th end 469 that flaky sealing element 461 is configured so that to make the 3rd end 467 form and does not have sticker also form the 4th non-bonding region 469h with sticker.In encapsulation process, the 3rd non-bonding region 467h is fixed in positive electrode side cover 340 airtightly by welding and the 4th non-bonding region 469h is fixed in negative electrode side cover 350 airtightly by welding.Therefore, the 3rd end 467 and positive electrode side cover 340 and the 4th end 469 and negative electrode side cover 350 can be only by welding and need not to be provided with sticker and interfix.Therefore, the 3rd end 467 can interfix respectively with negative electrode side cover 350 securely with positive electrode side cover 340 and the 4th end 469.
As for remainder, to part similar among the 3rd embodiment have to the 3rd embodiment in similar operation and effect.
(the 5th embodiment)
Below the 5th embodiment will be described.Omit or simplify to the 3rd embodiment in the explanation of similar part.In the 5th embodiment, the flaky sealing element 561 of formation seal member 560 is different from the flaky sealing element 361 and 461 among third and fourth embodiment.Other parts substantially to third and fourth embodiment in similar.Figure 16 illustrates and is used in the flaky sealing element in the battery module 561 among the 5th embodiment.
This flaky sealing element 561 is to have the first relative edge 561a and the second edge 561b and relative the 3rd edge 561c and the basic rectangular shape of the 4th edge 561d.This flaky sealing element 561 also is the plate that has about 100 μ m thickness and be coated with sticker, but its part comprises the uncoated zone that sticker is arranged.
Particularly, be provided with and wait that the upper surface and the banded first end 563 on the side surface that are arranged in air flue parts 330 comprise the first non-bonding region 563h that is not coated with sticker along the first edge 561a, extend between the 3rd edge 561c and the 4th edge 561d in this zone.In first end 563, more be close to the first edge 561a than the first non-bonding region 563h, be formed with first bonding region 564 that is coated with sticker.The second preset range g2 of first preset range g1 of the first end 563 on the air flue parts 330 on will being arranged in positive electrode side cover 340 1 sides (50mm or less than the scope of 50mm) and negative electrode side cover 350 1 sides (50mm or less than the scope of 50mm), provide first bonding region 564.
Be provided with and wait to be arranged on the upper surface of air flue parts 330 and the side surface and the banded the second end 565 that overlaps on the first end 563 from the outside comprises the second non-bonding region 565h that is not coated with sticker along the second edge 561b, extend between the 3rd edge 561c and the 4th edge 561d in this zone.In the second end 565, more be close to the second edge 561b than the second non-bonding region 565h, be formed with band shape second bonding region 566 that is coated with sticker.The same with first bonding region 564, the second preset range g2 of first preset range g1 of the second end 565 on the air flue parts 330 on will being arranged in positive electrode side cover 340 1 sides (50mm or less than the scope of 50mm) and negative electrode side cover 350 1 sides (50mm or less than the scope of 50mm), provide second bonding region 566.
Therefore, flaky sealing element 561 (seal member 560) is not fixed in the anodal sidepiece 333 of the air flue parts 330 that comprise along monocell configuration direction from the positive electrode side cover 340 inside preset range g1 (50mm or less than the scope of 50mm), and the negative pole sidepiece 335 (seeing Fig. 9 and 12) that comprises along monocell configuration direction from the negative electrode side cover air flue parts 330 of 350 inside preset range g2 (50mm or less than the scope of 50mm).
In addition, between the first edge 561a and the second edge 561b, along the 3rd edge 561c be provided with and to be spooled around positive electrode side cover 340 and band shape the 3rd end 567 of being fixed in positive electrode side cover 340 comprise the 3rd non-bonding region 567h that is not coated with sticker.In addition, between the first edge 561a and the second edge 561b, along the 4th edge 561d be provided with and to be spooled around negative electrode side cover 350 and band shape the 4th end 569 of being fixed in negative electrode side cover 350 be formed with the 4th non-bonding region 569h that is not coated with sticker.Remainder is coated with sticker.
In the 5th embodiment, form seal member 560 by this way, promptly, make this flaky sealing element 561 be wound on around the battery module to be sealed so that the part of the part of the second end 565 and first end 563 is overlapping, and they by welding with sleeve-shaped interfixed airtightly (seeing Fig. 8 to Figure 12).More specifically, in the second end 565, the part that is positioned at the second non-bonding region 565h that is not coated with sticker on the second edge 561b, one side overlaps on the part that is positioned at the first end 563 on the first edge 51a, one side and fixes by welding under the situation that sticker is not set from the outside.Therefore, with the same among the 4th embodiment, can especially strengthen the sealing characteristics of this weld.
In the 5th embodiment, with the same among the 4th embodiment, the 3rd end 567 of flaky sealing element 561 (the 3rd non-bonding region 567h) forms the first open end 560p of seal member 560, and it surrounds positive electrode side cover 340 and by the airtight positive electrode side cover 340 that is fixed in of welding under the situation that sticker is not set.The 4th end 569 (the 4th non-bonding region 569h) forms the second open end 560q of seal member 560, and it surrounds negative electrode side cover 350 and by the airtight negative electrode side cover 350 that is fixed in of welding under the situation that sticker is not set.Therefore, can especially strengthen the sealing characteristics of those welds.
And in the 5th embodiment, seal member 560 is not fixed in the first side cover sidepiece 333 and the second side cover sidepiece 335 (seeing Fig. 9 and Figure 12) of air flue parts 330.In other words, the first side cover sidepiece 333 and the second side cover sidepiece 335 can move freely under the situation that is not subjected to seal member 560 restrictions.Therefore, even, between air flue parts 330 and positive electrode side cover 340 and negative electrode side cover 350, form the gap, can not stretched by brute force with the part of the corresponding seal member 560 in gap when air flue parts 330 at low temperatures during thermal contraction.Particularly, when 330 thermal contractions of air flue parts, not only be stretched and extend with integral body with the part of the corresponding seal member 560 in above-mentioned gap but also with the first preset range g1 and the corresponding part of the second preset range g2.Therefore, hale stretch stress can only not be applied to the corresponding part in gap on.This can prevent to occur crack or other defective in seal member 560.Particularly, in the 5th embodiment, seal member 560 only is fixed in air flue parts 330 by first bonding region 564 with very narrow area.Even when 330 thermal contractions of air flue parts, also be not easy to especially in seal member 560, occur crack or other defective.
In the 5th embodiment, form the first non-bonding region 563h from the 3rd edge 561c to the four edge 561d.Yet, the border shown in the dotted line among Figure 16, the middle section 563k except that the first preset range g1 and the second preset range g2 can be coated with sticker.Even in this case, when 330 thermal contractions of air flue parts, not only will be stretched, so seal member 560 whole extensions with the corresponding part of aforementioned gap but also with the first preset range g1 and the corresponding part of the second preset range g2.Therefore, hale stretch stress can only not be applied to the corresponding part in gap on.This can prevent to occur crack or other defective in seal member 560.
To make an explanation to the manufacture method of the above-mentioned battery module among the 5th embodiment below.At first, with the 3rd embodiment in identical mode make battery module to be sealed.Afterwards, in encapsulation process, flaky sealing element 561 is wound on battery module to be sealed on every side with the gas-tight seal battery module.Particularly, flaky sealing element 561 being configured to its first edge 561a and the second edge 561b extends along monocell configuration direction.Afterwards in the first end 563 of flaky sealing element 561, first bonding region 564 is attached to the part of upper surface of air flue parts 330 so that temporary fixed.Afterwards, flaky sealing element 561 is wound on around the battery module to be sealed about the axis along monocell configuration direction, is adhered to this module simultaneously.
At this moment, flaky sealing element 561 invests each monocell shell 313 of battery group 310.Yet in the 5th embodiment, except that first bonding region 564 of first end 563, flaky sealing element 561 is not adhered to air flue parts 330.This be because, except that first bonding region 564, wait to be arranged in that the part of the flaky sealing element 561 on air flue parts 330 upper surfaces and the side surface is uncoated that sticker arranged, as mentioned above.
In the 4th embodiment, because the 3rd end 567 forms the 3rd non-bonding region 567h, so but the 3rd end 567 of flaky sealing element 561 is wound on around the positive electrode side cover 340 is not adhered to positive electrode side cover 340.Similar, because the 4th end 569 also forms the non-bonding region 569h that is not coated with sticker, therefore the 4th end 569 still is not adhered to negative electrode side cover 350 around being wound on negative electrode side cover 350.Afterwards, the second end 565 of flaky sealing element 561 overlaps on the first end 563 from the outside, and second bonding region 566 of the second end 565 is attached to first end 563 so that temporary fixed.
Subsequently, in the 4th embodiment, the second non-bonding region 565h of the second end 565 is fixed in first end 563 airtightly by welding.In addition, the 3rd end 567 (the 3rd non-bonding region 567h) is fixed in positive electrode side cover 340 airtightly by welding and the 4th end 569 (the 4th non-bonding region 569h) is fixed in negative electrode side cover 350 airtightly by welding.Therefore, finished battery module among the 5th embodiment.
It should be noted, to part similar among above-mentioned third and fourth embodiment provide to third and fourth embodiment in similar operation and effect.
(the 6th embodiment)
Below the 6th embodiment will be described.Omit or simplify to the 3rd to the 5th embodiment in the explanation of similar part.Figure 17 illustrates the battery module among the 6th embodiment.In the 6th embodiment, the air flue parts 630 of formation battery module are different from the air flue parts 330 among aforementioned the 3rd to the 5th embodiment.Other parts substantially to the 3rd embodiment in similar.
In the 6th embodiment, air flue parts 630 comprise the 630p of a plurality of (two) secondary air flue portions (part) that arranges along monocell configuration direction.When along monocell configuration direction when centre is cut, each secondary air flue 630p of portion is corresponding with half of air flue parts 330 among the 3rd to the 5th embodiment.Even for example at low temperatures during 630 thermal contractions of air flue parts, this structure of air flue parts 630 allows the secondary air flue 630p of portion thermal contraction individually.This can prevent to produce big gap between air flue parts 630 and positive electrode side cover 340 and negative electrode side cover 350.Therefore, surround between positive electrode side cover 340 and the air flue parts 330 and between negative electrode side cover 350 and the air flue parts 330 part of the seal member 360 on border can not bear so strong tensile stress.This can prevent to occur crack or other defective in the part of the seal member that is close to the border.
As for remainder, to part similar among above-mentioned the 3rd to the 5th embodiment provide to the 3rd to the 5th embodiment in similar operation and effect.
(the 7th embodiment)
Below the 7th embodiment will be described.Omit or simplify to any one of the 3rd to the 6th embodiment in the explanation of similar part.Figure 18 illustrates the perspective view that constitutes the maintenance dividing plate 710 of battery pack 700 among the 7th embodiment.The battery module 300 that Figure 19 illustrates among the 3rd embodiment is installed in the structure that keeps in the dividing plate 710.Figure 20 illustrates the battery pack 700 among the 7th embodiment.In Figure 18 to 20, suppose that in the battery pack of finishing the arranged direction of monocell 311 is monocell configuration direction X, the arranged direction of battery module 300 is module arrangement direction Y, is vertical direction Z perpendicular to their direction.
This battery pack 700 is will be as the secondary cell (for example, nickel metal hydride batteries) of the power source of motor vehicle and combination drive motor vehicle.Battery pack 700 comprises a plurality of (six) battery module 300 among the 3rd embodiment.Replace battery module 300, the battery module among the 4th, the 5th or the 6th embodiment also can be installed.Keep dividing plate 710 to be located in the space between the adjacent battery modules 300, described maintenance dividing plate 710 keeps battery modules 300.Those battery modules 300 and maintenance dividing plate 710 are by first dividing plate support unit 740 that is approximately the plate shape and second partition support unit 750 supportings that are approximately the plate shape.In addition, battery module 300, keep dividing plate 710, the first and second dividing plate support units 740,750 with unshowned end plate and the combined belt shape that is combined as a whole.
In these parts, battery module 300 as described in the third embodiment.
Except that first elastomeric element 723, second elastomeric element 725 and slab rubber spare 727, keep dividing plate 710 to make with a shape by electric insulation resin.Keep dividing plate 710 be arranged in the space between the battery module 300 with keep those battery modules 300 and each battery module 300 with keep forming cooling channel between the dividing plate 710 and therefrom pass with the permission coolant.
Particularly, as shown in Figure 18 and other figure, keep dividing plate 710 to comprise the diaphragm body 711 that is approximately tabular, it directly is arranged between the battery module 300.At an end place of the diaphragm body 711 of Z vertically, be provided with a plurality of first module supports 713 that are used to support the first short sidewall 300c of adjacent battery modules 300 (on every side nine, 18 altogether).These first module supports 713 are by constituting along the module arrangement direction Y outstanding plate shape on both sides perpendicular to vertical direction Z.At the other end place of the diaphragm body 711 of Z vertically, be provided with a plurality of second module supports 715 that are used to support the second short sidewall 300d of adjacent battery modules 300 (on every side nine, 18 altogether).Similar, these second module supports 715 are by constituting along the module arrangement direction Y outstanding plate shape on both sides perpendicular to vertical direction Z.The battery module 300 that invests maintenance dividing plate 710 is disposed between those the first module supports 713 and the second module support 715, therefore limits its vertically mobile (seeing Figure 19) of Z.
In addition, as shown in Figure 18 and other figure,, be provided with a plurality of three module supports 717 that are used to support the first end wall 300e of adjacent battery modules 300 (on every side two, four altogether) at an end place along the diaphragm body 711 of monocell configuration direction X.These three module supports 717 are all outstanding on both sides along module arrangement direction Y.At other end place, be provided with a plurality of four module supports 719 that are used to support the second end wall 300f of adjacent battery modules 300 (on every side two, four altogether) along the diaphragm body 711 of monocell configuration direction.Similar, these four module supports 719 are all outstanding on both sides along module arrangement direction Y.Be installed in the battery module 300 that keeps in the dividing plate 710 and be disposed between those three module supports 717 and the four module support 719, therefore limit its move (seeing Figure 19) along monocell configuration direction X.
In addition, as shown in Figure 18, diaphragm body 711 is equipped with a plurality of cooling channels and forms projection 721 to form the cooling channel that allows cooling media therefrom to pass between diaphragm body 711 and the adjacent first long sidewall 300a or the second long sidewall 300b.These cooling channels form projection 721 all along module arrangement direction Y outstanding and vertically Z extend linearly.Be installed in the first long sidewall 300a that keeps the battery module 300 in the dividing plate 710 or the second long sidewall 300b maintenance and form protruding 721 with cooling channel and contact, thereby between diaphragm body 711 and battery module 300, provide cooling channel.
In addition, at an end place of the diaphragm body 711 of Z vertically, be provided with a plurality of (two) first elastomeric element 723, described first elastomeric element 723 keeps to such an extent that contact with the first dividing plate support unit 740.Each first elastomeric element 723 all is oval (flat) tubular and is fixed in diaphragm body 711, and vertically Z was outstanding when it was assemblied on the protuberance (not shown) on diaphragm body 711 upper end side with box lunch.First elastomeric element 723 is made by rubber fully, and it is the Z elastically deformable vertically.
At the other end place of the diaphragm body 711 of Z vertically, be provided with a plurality of (two) second elastomeric element 725, described second elastomeric element 725 keeps to such an extent that contact with second partition support unit 750.Each second elastomeric element 725 all is basic oval cylinder and is fixed in diaphragm body 711, and vertically Z was outstanding when it was assemblied on the protuberance (not shown) on diaphragm body 711 lower end side with box lunch.Second elastomeric element 725 is made by rubber fully, and it is the Z elastically deformable vertically.
In the battery pack 700 (seeing Figure 20) of assembling, keep dividing plate 710 to be in a kind of like this state, promptly, vertically first elastomeric element 723 of Z strain (elastic compression) under pressure with the first dividing plate support unit, 740 Elastic Contact, and vertically second elastomeric element 725 of Z strain (elastic compression) under pressure with second partition support unit 750 Elastic Contact.Therefore, keep dividing plate 710 flexibly to be arranged between the first dividing plate support unit 740 and the second partition support unit 750.
In addition, diaphragm body 711 is equipped with a plurality of slab rubber parts 727 (on every side two, four altogether).Each slab rubber part 727 all is the Z long rectangular shape that extends vertically.Slab rubber part 727 fits in the rectangular through-hole that is formed in the diaphragm body 711 so that be fixed in wherein.Slab rubber part 727 is made by rubber fully, and it can be along module arrangement direction Y strain.When battery module 300 being installed in when keeping in the dividing plate 710 in those slab rubber parts 727 during along module arrangement direction Y strain, battery module 300 flexible fastenings in keeping dividing plate 710 so that slab rubber part 727 under pressure with the first long sidewall 300a or the second long sidewall 300b maintenance Elastic Contact of battery module 300.
Make above-mentioned battery pack 700 as follows.Particularly, make battery module 300 with the method described in the 3rd embodiment.On the other hand, preparation keeps dividing plate 710.Can prepare each by this way and keep dividing plate 710, that is, make rubber first elastomeric element 723 and second elastomeric element 725 and slab rubber part 727 be attached to each precalculated position of diaphragm body 711.Afterwards, when will keeping dividing plate 710 to be arranged in each space between them, arrange battery module 300.In addition, arrange the first dividing plate support unit 740 and second partition support unit 750, afterwards, all and end plate and combined belt combine to finish battery pack 700 with them.
As mentioned above, with reference to preferred embodiment the present invention has been described; Yet the present invention is not limited to above-mentioned first to the 7th embodiment and can other particular form embodies the present invention under the prerequisite that does not break away from its spirit or essential characteristic.
Industrial applicibility
According to the present invention, as understanding from the above description, the present invention relates in each monocell, be equipped with the battery module of safety valve, and can provide inexpensive and can prevent Leakage Gas battery module, comprise the battery pack of described battery module and method for producing battery module.
Claims (23)
1. battery module, it comprises a plurality of monocells, each in the described monocell all is provided with safety valve on the safety valve assembly wall of monocell shell, wherein
The described a plurality of monocells that are included in the described battery module are arranged such that described safety valve assembly wall along same direction orientation, and
Described battery module also comprises:
The air flue parts, these air flue parts cover all described safety valves that are included in the described a plurality of monocells in the described battery module, form the gas drain passageway thus between described air flue parts and described safety valve assembly wall; And
Be used for the seal member that between each monocell shell and described air flue parts, seals airtightly at least.
2. battery module according to claim 1 is characterized in that, described seal member is fixed in each monocell shell with described air flue parts.
3. battery module according to claim 1 is characterized in that, described seal member also seals the gap between the adjacent described monocell shell airtightly.
4. battery module according to claim 1 is characterized in that described seal member comprises adhesion zone, and this adhesion zone adheres to into cross-over connection each monocell shell and described air flue parts at least, to seal between them.
5. battery module according to claim 1, it is characterized in that, described seal member is a heat-shrinkable tube, and this heat-shrinkable tube surrounds described monocell shell and described air flue parts and provide mutual press contacts between described monocell shell and described air flue parts in contraction state.
6. battery module according to claim 1 is characterized in that,
At least a portion on the shell surface of each monocell shell is made of metal;
Described seal member has electric insulating quality; And
The part of metal at least that is included in the described shell surface of the described a plurality of monocells in the described battery module is covered by described seal member.
7. battery module according to claim 1 is characterized in that,
It is 0.5mm or less than the sheet of 0.5mm that described seal member is thickness.
8. battery module according to claim 1 is characterized in that,
Each monocell shell all is a rectangular shape, and wherein said safety valve assembly wall is a rectangle, and
Be included in described a plurality of monocells in the described battery module and be arranged such that each sidewall faces mutually, described each sidewall includes and limits the long limit that forms described safety valve assembly wall and the minor face in the minor face and perpendicular to described safety valve assembly wall.
9. battery module, it comprises:
The monocell group, wherein, a plurality of monocells that all are provided with safety valve in the safety valve assembly wall of monocell shell are configured in the row, make described safety valve assembly wall along same direction orientation;
Air flue parts, this air flue arrangements of components to cover them, form the gas drain passageway thus between described air flue parts and described safety valve assembly wall on described monocell group's described safety valve;
First side cover, this first side cover covers described monocell group and described air flue parts along monocell configuration direction from the one end;
Second side cover, this second side cover covers described monocell group and described air flue parts along described monocell configuration direction from its other end, and has the gas discharge outlet that is communicated with described gas drain passageway;
Seal member, the sealing arrangements of components is surrounded described monocell group and described air flue parts airtightly between described first side cover and described second side cover and with sleeve-shaped, described seal member comprises: be fixed in first open end that is positioned at an end place around described first side cover airtightly and be fixed in second open end that is positioned at other end place around described second side cover airtightly.
10. battery module according to claim 9 is characterized in that,
Described first side cover, described second side cover and described seal member are formed from a resin respectively,
Described first open end of described seal member is fixed in described first side cover airtightly by welding; And
Described second open end of described seal member is fixed in described second side cover airtightly by welding.
11. battery module according to claim 10 is characterized in that,
Described first open end of described seal member is fused to described first side cover under the situation that sticker is not set; And
Described second open end of described seal member is fused to described second side cover under the situation that sticker is not set.
12. battery module according to claim 9 is characterized in that,
Described seal member is made by the rectangle flaky sealing element, this rectangle flaky sealing element is rolled into sleeve-shaped around described monocell group and described air flue parts, make along the first edge setting of described rectangle flaky sealing element and wait to be arranged on the roof of described air flue parts banded first end with along the second edge setting relative with described first edge and the banded the second end of waiting to be arranged on the roof of described air flue parts overlapped, wherein, described the second end overlaps on the described first end from the outside, and described first end and described the second end are fixing airtightly mutually.
13. battery module according to claim 12 is characterized in that,
Described flaky sealing element is formed from a resin, and
Described seal member is arranged such that the described first end of described flaky sealing element and described the second end are fixing airtightly mutually by welding.
14. battery module according to claim 13 is characterized in that,
The described first end of described seal member and described the second end be welding mutually under the situation that sticker is not set.
15. battery module according to claim 9 is characterized in that,
Described seal member closely contacts with each monocell shell of described monocell group.
16. battery module according to claim 9, it is characterized in that, described seal member is not fixed in the first side cover sidepiece and the second side cover sidepiece of described air flue parts at least, the wherein said first side cover sidepiece extends in whole first preset range along described monocell configuration direction from described first side cover, and the described second side cover sidepiece extends in whole second preset range along described monocell configuration direction from described second side cover.
17. battery module according to claim 9 is characterized in that,
Described seal member passes through along described monocell configuration direction and is fixed in described air flue parts, and
Described air flue parts comprise a plurality of secondary air flue portion along the configuration of described monocell configuration direction.
18. a battery pack, it comprises each described one or more battery modules among the claim 1-17.
19. method for producing battery module, it comprises that the rectangle flaky sealing element that will have first edge, second edge, the 3rd edge and the 4th edge reels to seal the sealing step of described battery module to be sealed airtightly around battery module to be sealed, described battery module to be sealed comprises:
The monocell group, wherein, a plurality of monocells that all are provided with safety valve in the safety valve assembly wall of monocell shell are configured in the row, make described safety valve assembly wall along same direction orientation;
Air flue parts, this air flue arrangements of components to cover them, form the gas drain passageway thus between described air flue parts and described safety valve assembly wall on described monocell group's described safety valve;
First side cover, this first side cover covers described monocell group and described air flue parts along monocell configuration direction from the one end;
Second side cover, this second side cover covers described monocell group and described air flue parts along described monocell configuration direction from its other end, and has the gas discharge outlet that is communicated with described gas drain passageway; And
Wherein, described sealing step comprises:
Arrange described flaky sealing element, make described first edge and described second edge extend along described monocell configuration direction;
Described flaky sealing element is reeled around described battery module to be sealed, make the second end along described second edge from the outside with overlapping along the first end at described first edge, surround described first side cover simultaneously along the 3rd end at described the 3rd edge and surround described second side cover along the 4th end at described the 4th edge;
Described the second end is fixed in described first end airtightly, thereby described flaky sealing element is formed sleeve-shaped;
Described the 3rd end is fixed in described first side cover airtightly; And
Described the 4th end is fixed in described second side cover airtightly.
20. method for producing battery module according to claim 19 is characterized in that,
Described flaky sealing element is comprehensive adhesion flaky sealing element that whole surface all is coated with sticker, and
Described sealing step comprises:
By adhesion described the second end is fixed in described first end airtightly;
By adhesion described the 3rd end is fixed in described first side cover airtightly; And
By adhesion described the 4th end is fixed in described second side cover airtightly.
21. method for producing battery module according to claim 19 is characterized in that,
Described flaky sealing element is formed from a resin, and described the second end is included between described the 3rd edge and described the 4th edge and extends and the uncoated second non-bonding region that sticker is arranged, and
Described sealing step comprises by welding the described second non-bonding region of described the second end is fixed in described first end airtightly.
22. method for producing battery module according to claim 21 is characterized in that,
Described flaky sealing element comprises second bonding region that is coated with sticker than more close described second edge of the described second non-bonding region in described the second end, and
Described sealing step comprises by adhesion described second bonding region of described the second end is temporarily fixed on described first end that the described second non-bonding region with described the second end is fused to described first end afterwards.
23. according to claim 19,21 or 22 described method for producing battery module, it is characterized in that,
Described flaky sealing element is formed from a resin,
Described the 3rd end is included in uncoated the 3rd non-bonding region that sticker is arranged that extends between described first edge and described second edge,
Described the 4th end is included in uncoated the 4th non-bonding region that sticker is arranged that extends between described first edge and described second edge; And
Described sealing step also comprises by welding the described the 3rd non-bonding region of described the 3rd end is fixed in described first side cover airtightly, and by welding the described the 4th non-bonding region of described the 4th end is fixed in described second side cover airtightly.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004229613A JP4595433B2 (en) | 2004-08-05 | 2004-08-05 | Assembled battery |
| JP229613/2004 | 2004-08-05 | ||
| JP2005064250A JP4760061B2 (en) | 2005-03-08 | 2005-03-08 | Battery module, battery pack, and battery module manufacturing method |
| JP064250/2005 | 2005-03-08 | ||
| PCT/JP2005/013533 WO2006013743A1 (en) | 2004-08-05 | 2005-07-15 | Battery module, battery pack, and method for producing battery module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1993843A CN1993843A (en) | 2007-07-04 |
| CN1993843B true CN1993843B (en) | 2011-06-08 |
Family
ID=36027440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005800262145A Expired - Lifetime CN1993843B (en) | 2004-08-05 | 2005-07-15 | Battery module, battery pack, and battery module manufacturing method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4595433B2 (en) |
| CN (1) | CN1993843B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101112442B1 (en) * | 2008-10-14 | 2012-02-20 | 주식회사 엘지화학 | Battery Module Assembly of Improved Cooling Efficiency |
| JP5377955B2 (en) * | 2008-12-24 | 2013-12-25 | 三洋電機株式会社 | Power supply for vehicle |
| JP5601592B2 (en) * | 2009-06-01 | 2014-10-08 | 株式会社Ｇｓユアサ | Assembled battery and method of manufacturing the assembled battery |
| CN102024921B (en) * | 2009-09-14 | 2013-04-10 | 北京理工大学 | Fully-sealed laminated battery box |
| DE102010036686B4 (en) * | 2010-07-28 | 2020-05-28 | Intilion Gmbh | Device for receiving a galvanic element, energy storage unit and energy storage stack |
| JP5394343B2 (en) * | 2010-09-14 | 2014-01-22 | 本田技研工業株式会社 | Battery module |
| KR101188933B1 (en) | 2010-10-13 | 2012-10-08 | 에스비리모티브 주식회사 | Battery module |
| WO2013069308A1 (en) * | 2011-11-11 | 2013-05-16 | パナソニック株式会社 | Battery pack |
| DE102011087032A1 (en) * | 2011-11-24 | 2013-05-29 | Bayerische Motoren Werke Aktiengesellschaft | High-voltage battery |
| KR101678532B1 (en) | 2013-02-21 | 2016-11-22 | 삼성에스디아이 주식회사 | Battery module |
| KR101891892B1 (en) * | 2016-11-01 | 2018-08-27 | 신흥에스이씨주식회사 | Device of manufacturing cap-plate with safety-vent and membrane |
| KR102382382B1 (en) * | 2018-07-03 | 2022-04-01 | 주식회사 엘지에너지솔루션 | Battery Module Having Heat-Shrinkable Tube |
| JP7234908B2 (en) * | 2019-11-26 | 2023-03-08 | 株式会社豊田自動織機 | Pressure regulating valve structure and power storage module |
| JP2025128590A (en) * | 2024-02-22 | 2025-09-03 | トヨタ自動車株式会社 | Electric storage device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61116771A (en) * | 1984-11-12 | 1986-06-04 | Matsushita Electric Ind Co Ltd | Sealed storage battery |
| JPH0664360U (en) * | 1993-02-19 | 1994-09-09 | 沖電気工業株式会社 | Waterproof secondary battery pack |
| JP2000285886A (en) * | 1999-03-29 | 2000-10-13 | Matsushita Electric Ind Co Ltd | Battery pack device |
| JP2002151025A (en) * | 2000-11-08 | 2002-05-24 | Toyota Motor Corp | Collective battery pack |
| JP3728254B2 (en) * | 2002-01-31 | 2005-12-21 | 三洋電機株式会社 | Assembled battery |
| JP4218267B2 (en) * | 2002-07-08 | 2009-02-04 | トヨタ自動車株式会社 | Battery |
-
2004
- 2004-08-05 JP JP2004229613A patent/JP4595433B2/en not_active Expired - Lifetime
-
2005
- 2005-07-15 CN CN2005800262145A patent/CN1993843B/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1993843A (en) | 2007-07-04 |
| JP2006049136A (en) | 2006-02-16 |
| JP4595433B2 (en) | 2010-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1993843B (en) | Battery module, battery pack, and battery module manufacturing method | |
| EP1775784A1 (en) | Battery module, battery pack, and method for producing battery module | |
| CN114256554B (en) | Battery pack without module frame, vehicle and energy storage device | |
| JP4576646B2 (en) | Fuel cell | |
| JP6059445B2 (en) | Gas exhaust pipe | |
| US9252407B2 (en) | Battery module | |
| ES2480272T3 (en) | Compression housing for a fuel cell stack and method for manufacturing a compression housing for a fuel cell stack | |
| JP7618333B2 (en) | Battery pack and device including same | |
| CN101128946A (en) | Battery | |
| CN211295236U (en) | Battery module | |
| WO2016132404A1 (en) | Power source device | |
| KR101272594B1 (en) | Manifold block for fuel cell stack | |
| JP5240963B2 (en) | Assembled battery | |
| JP2012094507A (en) | Single battery, battery module, and battery pack | |
| WO2021052004A1 (en) | Battery module, battery pack, and vehicle | |
| US11296385B2 (en) | Battery module and battery pack | |
| JPH10228918A (en) | End cell structure of fuel cell | |
| JP2023524735A (en) | Cover assembly, battery cell, battery, power consumer, method and apparatus | |
| JP2006236957A (en) | Constituent member for fuel cell | |
| JP2014179228A (en) | Battery pack | |
| JP2006244981A (en) | Power supply | |
| JPH06176774A (en) | Layer-built fuel cell | |
| CN218602673U (en) | A division board for battery module and battery module thereof | |
| JP4760061B2 (en) | Battery module, battery pack, and battery module manufacturing method | |
| WO2023206981A1 (en) | Battery and battery module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110608 |