CN1261728A - Safety device for secondary battery - Google Patents
Safety device for secondary battery Download PDFInfo
- Publication number
- CN1261728A CN1261728A CN99121937A CN99121937A CN1261728A CN 1261728 A CN1261728 A CN 1261728A CN 99121937 A CN99121937 A CN 99121937A CN 99121937 A CN99121937 A CN 99121937A CN 1261728 A CN1261728 A CN 1261728A
- Authority
- CN
- China
- Prior art keywords
- safety device
- secondary cell
- coupling member
- mentioned
- writing
- 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.)
- Pending
Links
- 239000011244 liquid electrolyte Substances 0.000 claims abstract description 8
- 230000008878 coupling Effects 0.000 claims description 28
- 238000010168 coupling process Methods 0.000 claims description 28
- 238000005859 coupling reaction Methods 0.000 claims description 28
- 238000009413 insulation Methods 0.000 claims description 9
- 239000012212 insulator Substances 0.000 claims description 5
- 230000033001 locomotion Effects 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 238000004880 explosion Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 abstract 1
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910021437 lithium-transition metal oxide Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
本发明公开一种二次电池的安全装置,使具有安全阀的极板和电流断路器的动作更准确,可以确保对电池的异常动作或爆炸的安全性,其特征在于:在存放有电极部和液体电解质的外壳上端开口处,通过密封垫板自下而上依次层叠具有安全阀的极板和盖罩,将极板和盖罩电连接的电流断路器设在上述极板和盖罩之间,该电流断路器由于极板的可变部分的上升动作而受到压力被剪断。
The invention discloses a safety device for a secondary battery, which can make the action of the polar plate with a safety valve and the current circuit breaker more accurate, and can ensure the safety of the abnormal operation or explosion of the battery, and is characterized in that: the electrode part is stored At the opening of the upper end of the casing with the liquid electrolyte, the plates and the cover with safety valves are sequentially stacked through the sealing backing plate from bottom to top, and the current circuit breaker for electrically connecting the plates and the cover is arranged between the above-mentioned plates and the cover. During this period, the circuit breaker is sheared due to the stress caused by the rising action of the variable part of the plate.
Description
The present invention relates to the safety device of secondary cell, when battery under improper action situation, internal pressure rises to authorized pressure this device action when above, cuts off electric current, emits internal gas pressure, can guarantee the fail safe of battery.
Secondary cell be can repeated charge battery, realized miniaturization and high capacity recently.Representative secondary cell mainly uses ni-mh (Ni-MH) battery, lithium battery (Li) and lithium ion (Li-ion) battery.
As this secondary cell and widely used lithium ion battery, positive active material uses the lithium transition-metal oxide, and negative electrode active material uses carbon or carbon complex, inject the liquid electrolyte of dissolving lithium salts between the two in the organic solution, moving an electrode that is produced by the lithium ion between above-mentioned positive pole and negative pole can discharge and recharge.
Fig. 7 represents to have the lithium ion battery of present well-known spirality (spirally-wound) electrode.Electrode part 2 and liquid electrolyte that anodal, dividing plate and negative pole are reeled together are placed on the inside of the shell 4 that is connected with above-mentioned negative pole jointly, are equipped with the lid assembly 8 that insulate and be connected with above-mentioned positive pole through sealed bolster plate 6 on the top of this shell 4.
Lid assembly 8 is undertaken stacked from top to bottom by housing 10, flow restricter 12 and order with pole plate 14 of safety valve, adhere to tie breaker 18 in the bottom of pole plate 14 through insulator 16.This lid assembly 8 assembles and seals by top crimping or the additive method to shell 4, and tie breaker 18 welded with anodal tap ( ッ プ) 20 earlier contact installation with positive pole before.
The battery of She Zhiing will cause the decomposition of liquid electrolyte on positive pole when abnormal operation or overload like this, will separate out the lithium metal on negative pole, can cause short circuit.At this moment, internal pressure will rise to more than the pressure of regulation, have the danger of heating and blast.
Because this reason, the present groove 14a that on pole plate 14, forms certain depth with the method or the caustic solution of machinery with safety valve, perhaps make distortion relatively frailly, when the pressure of inside battery rises to regulation when above, at first remove solder bond with tie breaker 18, and make groove 14a and fragile partial rupture, and make current interruption, press in reducing to prevent blast.
But there is the bad problem of its action in former safety device.For example, because having the pole plate 14 of safety valve and flow restricter 18 mutually combines by welding, according to its weld strength decision operating pressure, be difficult so make above-mentioned operating pressure suitable technically exactly, especially when misoperation, can bring the danger of battery explosion.
The objective of the invention is to provide a kind of safety device of secondary cell, make the action of pole plate with safety valve and tie breaker more accurate, can guarantee the abnormal operation of battery and the fail safe of blast in order to solve above-mentioned prior art problems.To achieve these goals, the present invention takes following technical scheme: a kind of safety device of secondary cell is characterized in that:
At the shell upper end open place of depositing electrode part and liquid electrolyte, stack gradually pole plate and housing from bottom to top with safety valve by sealed bolster plate, the tie breaker that pole plate and housing are electrically connected is located between above-mentioned pole plate and the housing, and this tie breaker is cut off owing to the vertical motion of the variable part of pole plate is under pressure.
The safety device of the secondary cell of being put down in writing is characterized in that:
Above-mentioned tie breaker comprises: the upper guide electroplax and the lower guide electroplax that are configured by insulator;
Be the coupling member that two conductive plates is mutually combined prolong from conductive plate;
In the outstanding insulation projection in the bottom of this coupling member.
The safety device of the secondary cell of being put down in writing is characterized in that:
Above-mentioned coupling member comprises the top and the bottom coupling member that is prolonged respectively by upper guide electroplax and lower guide electroplax.
The safety device of the secondary cell of being put down in writing is characterized in that:
Above-mentioned insulation projection runs through coupling member and carries out combination.
The safety device of the secondary cell of being put down in writing is characterized in that:
Above-mentioned coupling member overlaps each other, and carries out the face contact.
The safety device of the secondary cell of being put down in writing is characterized in that:
On above-mentioned coupling member, be provided with fluting (ノ ッ チ).
The safety device of the secondary cell of being put down in writing is characterized in that:
Flow restricter also is housed between above-mentioned housing and tie breaker.
In the formation of secondary cell, the inside that electrode part that anodal, negative pole and dividing plate are reeled together and liquid electrolyte are placed on shell jointly, opening part at this shell stacks gradually pole plate and the housing with safety valve from bottom to top, and sealing links the lid assembly of tie breaker between above-mentioned pole plate with safety valve and housing.
Above-mentioned tie breaker comprises: clip insulator and the upper guide electroplax and the lower guide electroplax that dispose; The coupling member that links two conductive plates; And the insulation projection on this coupling member.When the internal pressure of battery rises to more than the authorized pressure, when the variable part of the pole plate with safety valve is risen,, this tie breaker is under pressure owing to will contacting with this variable part, so linking portion is cut off, make failure of current.
Herein, the coupling member of tie breaker comprises the coupling member up and down that prolongs respectively from upper guide electroplax and lower guide electroplax, adheres to the insulation projection on the bottom surface, has fluting, or forms the hole, above-mentioned projection is run through combine, and can adjust its shearing strength.In addition, the end of top and the bottom coupling member also can be overlapping, carries out the face contact.
Like this, the displacement difference of the pole plate variable part of the safety device of secondary cell by having safety valve and the shearing strength of tie breaker according to the present invention just can accurately be set the pressure of action, can guarantee the abnormal operation of battery or the fail safe of blast.
Good effect of the present invention:
Formation by above explanation and effect as can be known, the safety device of secondary cell of the present invention has improved the tie breaker that links between pole plate with safety valve and housing, from having removed prior art problems in fact.
That is, the present invention can set the operating pressure and the period of safety device exactly.According to this point, when the internal pressure of battery rises to authorized pressure when above, can realize correct action, consequently can guarantee fail safe and reliability.
These and other purposes of the present invention, advantage and feature will be in conjunction with the drawings to the description of embodiments of the invention and further specified, in these accompanying drawings:
With reference to the accompanying drawings, describe embodiments of the invention in detail.
Fig. 1 is the part sectional drawing of expression secondary cell of the present invention.
Fig. 2 is the separation oblique view that safety device of the present invention is amplified expression.
Fig. 3 is a safety device movement state diagram of the present invention.
Fig. 4 is the secondary cell part sectional drawing of the other example of expression the present invention
Fig. 5 is the secondary cell part sectional drawing of the other example of expression the present invention
Fig. 6 is the secondary cell part sectional drawing of the other example of expression the present invention
Fig. 7 is the part sectional drawing of the existing well-known secondary cell of expression
As depicted in figs. 1 and 2, present embodiment describes the lithium ion battery with helical structure as an example of secondary cell, for the identical formation of quoting with the accompanying drawing of prior art of part, uses identical label.
As shown in Figure 1, the electrode part 2 that secondary cell of the present invention is reeled anodal, negative pole and dividing plate together and liquid electrolyte are put into the inside of shell 4 jointly, by crimping and other methods the opening of this shell 4 are sealed assembling by lid assembly 80.Lid assembly 80 is by sealed bolster plate 6 and shell 4 insulation, and pole plate 14 portion in the central provides variable part 14b.
The composition of lid assembly 80 of the present invention comprises: stack gradually pole plate 14 and housing 10 with safety valve from bottom to top, above-mentioned housing 10 and have on the pole plate 14 of safety valve interconnective tie breaker 180 is housed.
In Zhuan Pei the lid assembly 80, the pole plate 14 usefulness taps 20 with safety valve are connected with the positive pole of electrode part 2 like this, then should be attached on the anodal final end cap cover 10.Feature of the present invention is between pole plate 14 and housing 10 tie breaker 180 to be set to link.
To this more detailed description as shown in Figure 2.The formation of tie breaker 180 of the present invention comprises: upper guide electroplax 182 is housed, lower guide electroplax 184 is housed and the coupling member 19 that links these parts is housed in pole plate 14 1 sides with safety valve through the side of insulator 160 at housing 10.Each coupling member 186a, the 186b that are prolonged by these two conductive plates 182,184 mutually combine the end with electrically conducting.Above-mentioned coupling member 186a, 186b can carry out combination by welding, fluting or face contact and other methods.
The tie breaker 180 of Gou Chenging like this, on the cardinal principle centre position between coupling member 186a and the 186b, has insulation projection 188, the internal pressure of battery rises to more than the authorized pressure, when the variable part 14b with pole plate 14 of complete valve rises, current interruption contacts with variable part and is under pressure, so cut off electric current is disconnected.
Be coupling member 186a, the 186b of tie breaker 180 of the present invention, when inner pressure of battery rises as shown in Figure 3, be subjected to this pressure just to the variable part 14b of the pole plate 14 of the safety valve of upside distortion by having, be under pressure and deform when being pressed towards, cut off when above when this pressure rises to regulation, the electric current that flows through between the lower guide electroplax 184 that upper guide electroplax 182 that flow restricter 12 and housing 10 1 sides are provided with and pole plate 14 1 sides with safety valve are provided with is cut off.
At this moment, the shearing strength of coupling member 186a, the 186b of tie breaker 180 can be according to the diameter that connects the hole that connection bump 188 is provided with, and as shown in Figure 4, according to adhere on the bottom surface insulation projection 188 ' state under the fluting 190 that is provided with of optional position, determine according to the basal area of adjusting place of incision, can also transfer this intensity according to operating pressure.In addition, as Fig. 5 and shown in Figure 6, coupling member 186a, 186b also can be overlapped, carry out the face contact.
In addition, safety device of the present invention can be adjusted the pressure of its action by the method for displacement of variable part 14b that adjustment has a pole plate 14 of safety valve.At this moment, the displacement of variable part 14b can be according to groove 14a and the thickness decision with pole plate 14 materials of safety valve.
According to such formation, safety device of the present invention can have the displacement difference of variable part 14b of pole plate 14 of safety valve and the coupling member 186a of tie breaker 180, the shear strength of 186b by adjustment, make it consistent, operating pressure is accurately set with design load.
Therefore, secondary cell of the present invention, when action owing to improper pressure, make internal pressure rise to authorized pressure when above, the variable part 14b with pole plate 14 of safety valve will rise, thereby coupling member 186a, the 186b of tie breaker 180 cut off electric current by the effect of cutting off for the first time, then, the groove 14a of the pole plate 14 by having safety valve breaks, and eliminates the internal pressure of battery for the second time, thereby can guarantee fail safe.
Claims (7)
1, a kind of safety device of secondary cell is characterized in that:
At the shell upper end open place of depositing electrode part and liquid electrolyte, stack gradually pole plate and housing from bottom to top with safety valve by sealed bolster plate, the tie breaker that pole plate and housing are electrically connected is located between above-mentioned pole plate and the housing, and this tie breaker is cut off owing to the vertical motion of the variable part of pole plate is under pressure.
2, the safety device of the secondary cell of putting down in writing as claim 1 is characterized in that:
Above-mentioned tie breaker comprises: the upper guide electroplax and the lower guide electroplax that are configured by insulator;
Be the coupling member that two conductive plates is mutually combined prolong from conductive plate;
In the outstanding insulation projection in the bottom of this coupling member.
3, the safety device of the secondary cell of putting down in writing as claim 2 is characterized in that:
Above-mentioned coupling member comprises the top and the bottom coupling member that is prolonged respectively by upper guide electroplax and lower guide electroplax.
4, the safety device of the secondary cell of putting down in writing as claim 2 is characterized in that:
Above-mentioned insulation projection runs through coupling member and carries out combination.
5, the safety device of the secondary cell of putting down in writing as claim 2 is characterized in that:
Above-mentioned coupling member overlaps each other, and carries out the face contact.
6, the safety device of the secondary cell of putting down in writing as claim 2 is characterized in that:
On above-mentioned coupling member, be provided with fluting.
7, the safety device of the secondary cell of putting down in writing as claim 1 to claim 4 is characterized in that:
Flow restricter also is housed between above-mentioned housing and tie breaker.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR47936/1998 | 1998-11-10 | ||
| KR1019980047936A KR100274897B1 (en) | 1998-11-10 | 1998-11-10 | The safety apparatus of secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1261728A true CN1261728A (en) | 2000-08-02 |
Family
ID=19557670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99121937A Pending CN1261728A (en) | 1998-11-10 | 1999-10-15 | Safety device for secondary battery |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2000149919A (en) |
| KR (1) | KR100274897B1 (en) |
| CN (1) | CN1261728A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100388528C (en) * | 2004-09-24 | 2008-05-14 | 三星Sdi株式会社 | rechargeable battery |
| US7618736B2 (en) | 2003-06-23 | 2009-11-17 | Byd Company Limited | Stacked-type lithium-ion rechargeable battery |
| CN104009257A (en) * | 2013-02-27 | 2014-08-27 | 三星Sdi株式会社 | Rechargeable battery |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100373730B1 (en) * | 2000-09-18 | 2003-02-25 | 삼성에스디아이 주식회사 | Safety apparatus used in Secondary battery |
| CN103151479B (en) * | 2013-01-31 | 2015-10-07 | 浙江努奥罗新能源科技有限公司 | A kind of colliery energy-storage battery and battery core thereof |
| JP6662377B2 (en) * | 2015-03-27 | 2020-03-11 | 三洋電機株式会社 | Cylindrical battery |
-
1998
- 1998-11-10 KR KR1019980047936A patent/KR100274897B1/en not_active Expired - Fee Related
-
1999
- 1999-08-04 JP JP11221313A patent/JP2000149919A/en active Pending
- 1999-10-15 CN CN99121937A patent/CN1261728A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7618736B2 (en) | 2003-06-23 | 2009-11-17 | Byd Company Limited | Stacked-type lithium-ion rechargeable battery |
| CN100388528C (en) * | 2004-09-24 | 2008-05-14 | 三星Sdi株式会社 | rechargeable battery |
| CN104009257A (en) * | 2013-02-27 | 2014-08-27 | 三星Sdi株式会社 | Rechargeable battery |
| US9711777B2 (en) | 2013-02-27 | 2017-07-18 | Samsung Sdi Co., Ltd. | Rechargeable battery |
| CN104009257B (en) * | 2013-02-27 | 2019-01-22 | 三星Sdi株式会社 | rechargeable battery |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100274897B1 (en) | 2000-12-15 |
| KR20000031742A (en) | 2000-06-05 |
| JP2000149919A (en) | 2000-05-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |