CN102136402A - Temperature-sensitive element and packaged battery - Google Patents
Temperature-sensitive element and packaged battery Download PDFInfo
- Publication number
- CN102136402A CN102136402A CN2011100252507A CN201110025250A CN102136402A CN 102136402 A CN102136402 A CN 102136402A CN 2011100252507 A CN2011100252507 A CN 2011100252507A CN 201110025250 A CN201110025250 A CN 201110025250A CN 102136402 A CN102136402 A CN 102136402A
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- sensitive element
- conductive plate
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- 229920002521 macromolecule Polymers 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims description 51
- 238000005476 soldering Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 239000004698 Polyethylene Substances 0.000 abstract description 3
- -1 polyethylene Polymers 0.000 abstract description 3
- 229920000573 polyethylene Polymers 0.000 abstract description 3
- 239000000919 ceramic Substances 0.000 abstract 1
- 239000002923 metal particle Substances 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 45
- 239000000853 adhesive Substances 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 9
- 238000009413 insulation Methods 0.000 description 9
- 238000005336 cracking Methods 0.000 description 8
- 229920003002 synthetic resin Polymers 0.000 description 7
- 239000000057 synthetic resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000011255 nonaqueous electrolyte Substances 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003738 black carbon Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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
- Connection Of Batteries Or Terminals (AREA)
- Thermistors And Varistors (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a temperature-sensitive element and a packaged battery having the temperature-sensitive element, which enables prevention of the element characteristic change due to a distortion of the element main body, a good reliability of the current control, a capability of ensuring the needed area for welding because of a capability of setting the size of a conductive plate, and meanwhile a capability of achieving a required element characteristic because of being able to set the size and the shape of the element main body. A PTC (Positive Temperature Coefficient) element (5) has an element part (51) formed by scattering metal particles such as Ni, etc. on macromolecules such as polyethylene, etc. and comprising an plate-shaped element main body (511) with a resistor dealing with the temperature change and a surrounding frame (512) made of materials such as ceramics and surrounding the four side surfaces of the element main body (511) at required intervals. Furthermore, each plane of the element main body (511) and each edge face of the surrounding frame (512) are jointed through sticking layers (514,513) and lead wires (52,53) made of Ni, for example.
Description
Technical field
It is high and limit the temperature-sensitive element of electric current well when producing overcurrent etc. and possess the packaged battery of this temperature-sensitive element to the present invention relates to have the degree of freedom that the size of good intensity, element body sets.
Background technology
Carry the power supply of electronic equipment as video camera, mobile computer, pocket telephone etc., the roughly rectangular-shaped rechargeable nonaqueous electrolytic battery that main use can discharge and recharge.
As an example of rechargeable nonaqueous electrolytic battery, enumerated lithium rechargeable battery (below, be called battery).In this battery, will be contained in the housing of Al or Al alloy system across dividing plate electrode group and the nonaqueous electrolyte that positive pole and negative pole form of reeling.
Constitute battery at described one surface of battery configuration protection circuit substrate, this protective circuit substrate has and is used to prevent to overcharge and the protective circuit of overdischarge and be used for taking out electric power or being taken into the input and output terminal of electric power from the outside to the outside from battery.Be electrically connected by lead-in wire between protective circuit substrate and the battery.
By have frame up outside insulating properties for example plastic that body covers four sides of described battery or battery be accommodated in plastic external shell etc. after, thereby can access packaged battery by label clad battery core.
In addition; known have a following packaged battery: at the cap centralized configuration protective circuit substrate of battery with protection components such as temperature-sensitive elements and after being connected their wiring part; carry out the shaping of inlaying of hot melt molding etc.; between cap and protective circuit substrate, form resin molded portion, with covering protection circuit substrate under the state that exposes at input and output terminal (for example patent documentation 1 etc.).
As mentioned above, usually, packaged battery possesses temperature-sensitive element, to carry out the control of input and output electric power according to the temperature of battery.As temperature-sensitive element, known have PTC (Positive TemperatureCoefficient) element, NTC (Negative Temperature Coefficient) element, an auto-cutout element etc.
The PTC element roughly is divided into pottery system and macromolecular.Under the situation of macromolecular PTC element, will be in macromolecule electroconductive particle such as disperse black carbon, metallic and the PTC composition that obtains forms sheet and the composed component main body, and the conductive plate (electrode) of Ni etc. is engaged with the table back of the body of this element body.In recent years, used initial resistivity value low and mostly to the PTC element of the high low resistance type of the restorability of initial resistivity value.
The PTC composition is generally low resistance, by self heat release and resistance increases, perhaps utilizes environment temperature and resistance increases when producing the overcurrent of burst, and consequently, the electric current road is cut off.Resistivity along with temperature rises anxious increase be because, the thermal expansion under crystalline melt point of crystalline macromolecule is big, the electroconductive particle that therefore at room temperature forms network separates.The PTC element is subjected to the influence of heat easily, especially in the situation of the PTC element of above-mentioned low resistance type, undertaken may hindering element characteristic under the molded situation by inlaying to be shaped.Therefore, in the PTC of low resistance type element etc., it is also known for owing to keep insulating properties, improve the purposes such as reliability when using, apply the PTC element (for example patent documentation 2 etc.) of outer surface by the synthetic resin of insulating properties.
Figure 14 is an exploded perspective view of representing the battery 36 of packaged battery in the past, and Figure 15 is the end view of expression PTC element 38.
In battery 2, above-mentioned electrode group and nonaqueous electrolyte (not shown) are contained in the housing 21 of the rectangular-shaped Al that is after the chamfering or Al alloy system.The opening of housing 21 is by described cap 22 obturations of Al or Al alloy system.Rise to cracking under the situation more than the setting and cracking valve 22a that inner pressure of battery is discharged being provided with on the cap 22 than other parts thin thickness and at inner pressure of battery.Upload at cracking valve 22a and to be equipped with insulation board 37.
State with insulation on cap 22 is provided with negative terminal 23.
Tabular element body 38a that forms and lead-in wire 38b, the 38c that engages with the part on its two plane constitute PTC element 38 by dispersed metal particulate in macromolecule.Extend to the outside of the length direction of PTC element 38 end of lead-in wire 38b, 38c.The end of lead-in wire 38b is connected with negative terminal 23 via lead-in wire 7, and the end of the 38c that goes between 8 is connected with the splicing ear (not shown) of the negative side of protective circuit substrate 9 via going between.
Between protective circuit substrate 9 and PTC element 38, be provided with insulation board 13.
And, the splicing ear of the side of the positive electrode of protective circuit substrate 9 (not shown) via the lead-in wire 12 be arranged on cap 22 on be connected by this two-layer composite plate that constitutes 11 of Ni layer and Al layer.
Under the state that exposes on the surface of the terminal 9a of above such battery that constitutes 36; by plastic cover mold system portion (not shown) seal protection circuit substrate 9, wiring etc.; bottom surface by molded 14 clad battery 2 in bottom surface; and two planes and two side faces by label clad battery core 36, constitute packaged battery thus.
Molded 14 of above-mentioned cover mold system portion and bottom surface can be inlayed to be shaped and be obtained by the resin that battery 36 is contained in mould and injects fusion.
Figure 16 is an exploded perspective view of representing the battery 39 of other packaged battery in the past.Among the figure, the part mark prosign identical with the battery of Figure 14 also omits detailed explanation.
In battery 39, mounting insulation board 18 on the cracking valve 22a of cap 22.And PTC element 40 engages conductive plate 40b, 40c by two integral planes at tabular element body 40a and forms.
Lead-in wire 17 is by connected to each other the forming in long limit with two boards of rectangular shaped, under the rectangular state of two boards a side board is connected with negative terminal 23.Coating solder paste and mounting PTC element 40 on protective circuit substrate 9, and after carrying out soldering by reverberatory furnace, with the board spot welding of conductive plate 40c with the opposing party of lead-in wire 17, thus protective circuit substrate 9 is electrically connected with negative terminal 23.Afterwards, 17 bendings that will go between so that 17 two boards of going between are involutory, thus protective circuit substrate 9 with the inside and cap 22 opposed state configuration on cap 22.
Patent documentation 1: TOHKEMY 2005-346945 communique
Patent documentation 2: Japanese kokai publication hei 9-283263 communique
In the packaged battery in the past of Figure 14, when being shaped in cover mold system portion, PTC element 38 may be subjected to the influence of heat as mentioned above.In addition, because PTC element 38 is erected between negative terminal 23 and the protective circuit substrate 9 with the state that exposes element body 38a, therefore, external force acts on element body 38a and produces distortion when being shaped in cover mold system portion, and element characteristic may change.Particularly, under the situation that produces distortion, the situation that exists owing to hinder thermal expansion the operating temperature when the electric current road cuts off (disconnection) to change with respect to original value.
And battery 2 is under the situation that the direction perpendicular to the plane expands like that shown in the double dot dash line L of Figure 14 when unusual, and cap 22 is to housing 21 side deflections, and protective circuit substrate 9 produce distortion on the PTC element 38, thereby element characteristic may change also along with deflection.
In the battery 39 of the packaged battery of Figure 16, PTC element 40 is fixed on the protective circuit substrate 9 by reflow soldering, on conductive plate 40c, need the area of the regulation that is used to carry out spot welding.The area of conductive plate 40b, 40c is equivalent to the sectional area of element body 40a, by the element characteristic of this sectional area decision PTC element 40.To reduce under the situation of described sectional area in order to reduce the operating temperature when disconnecting, exist because above-mentioned restriction and can't reduce this sectional area, be the problem of the size of PTC element 40.
And in the operation with 17 bendings of above-mentioned lead-in wire, element body 40a also may produce distortion.
In addition, in the PTC of patent documentation 2 element, because the thin thickness of coat, so the protection of element body and lead-in wire is insufficient, may exist be difficult to handle, damage when assembling, the problem of reliability step-down.
Summary of the invention
The present invention proposes in view of such situation; its purpose is to provide a kind of temperature-sensitive element; it can be at external force and heat protection component main body well; can the suppression element main body deform and the situation of element characteristic variation; and the reliability of Current Control is good; and can set the size of conductive plate, can guaranteeing to weld needed area, and the element characteristic that requires of size that simultaneously can the setting member main body and shape and can realizing.
In addition, the object of the present invention is to provide a kind of packaged battery, reaches during fabrication and can be suppressed at when using that element body deforms and situation that element characteristic changes, and the reliability of Current Control is good, and when flowing through super-high-current and temperature can cut off the electric current road well when rising.
The temperature-sensitive element of a first aspect of the present invention possess resistance corresponding to the tabular element body of variations in temperature and with two conductive plates of two plane engagement of this element body, described temperature-sensitive element is characterised in that, possess the encirclement frame of the side that surrounds described element body, each conductive plate engages with each plane of described element body and each architrave face of described encirclement frame.
In the present invention, because element body is by conductive plate and surround the frame covering, therefore carrying out resin molded to temperature-sensitive element and electronic unit or its situation about falling down is inferior when external force acts on temperature-sensitive element, can the suppression element main body on generation stress and situation about deforming.In addition, when resin molded the shaping, under the situation of temperature-sensitive element conduction heat, can suppress heat and be delivered to element body.Therefore, do not need resin-coating element body by insulating properties.
In addition, owing to can accommodate element body with the state that separates predetermined distance from the encirclement frame, therefore with the temperature-sensitive element reflow soldering during in substrate or when carrying out spot welding etc., can set the size on conductive plate (plane of temperature-sensitive element), can guarantee to weld needed area, and size and shape that simultaneously can the setting member main body, with the element characteristic (operating temperature of disconnection etc.) that can realize requiring.
On the basis of first aspect, the temperature-sensitive element of a second aspect of the present invention is characterised in that, is provided with to the extended extension in the outside of described encirclement frame at described conductive plate.
In the present invention, can be connected with electronic unit by described extension.
First or the basis of second aspect on, the temperature-sensitive element of a third aspect of the present invention is characterised in that described encirclement frame is made of ceramic material.
In invention, better with respect to the intensity and the thermal endurance of ambient pressure.
First to the third aspect on the basis of either side, the temperature-sensitive element of a fourth aspect of the present invention it is characterized in that described element body is included in the PTC composition that is dispersed with electric conductor in the macromolecule.
In the present invention, though anti-ambient pressure of element body and heat resistance are more weak, the good element body of protective current control characteristic well.
The packaged battery of a fifth aspect of the present invention is characterised in that to possess: the battery of polyhedral; The described temperature-sensitive element of either side in one side's conductive plate and first to fourth aspect that described battery is electrically connected.
In the present invention, because the intensity and the thermal endurance of temperature-sensitive element is good, element body produces distortion and situation that element characteristic changes in the time of therefore can suppressing to make etc.Therefore, the reliability of Current Control is good.
On the basis aspect the 5th, the packaged battery of a sixth aspect of the present invention is characterised in that to possess: the terminal substrate, and itself and described one surface of battery arranged opposite, and have the terminal that is used for to this battery input and output electric power; Resinous molded portion, it covers described one side and terminal substrate under the state that described terminal exposes, and wherein, the opposing party's of described temperature-sensitive element conductive plate is electrically connected with described terminal substrate.
In the present invention, when molded is shaped, can suppress that ambient pressure and hotwork are used for element body and situation that element characteristic changes.
On the basis aspect the 6th, the packaged battery of a seventh aspect of the present invention is characterised in that described the opposing party's conductive plate is connected in described terminal substrate by reflow soldering.
In the present invention, the plane that can be set at temperature-sensitive element has the needed area of reflow soldering, and the element body of interior bag has the needed size of element characteristic and the shape of the requirement of realizing.
The invention effect
According to temperature-sensitive element of the present invention, possess the encirclement frame of the side of embracing element main body, therefore each conductive plate engages with each plane of described element body and each architrave face of described encirclement frame, can be at external force and heat protection component main body well.Therefore, can the suppression element main body deform and the situation of element characteristic variation, and the reliability of Current Control is good.And can set the size of conductive plate, can guaranteeing to weld needed area, and size and shape that simultaneously can the setting member main body, make it possible to realize the element characteristic (operating temperature of disconnection etc.) that requires.
According to packaged battery of the present invention, possess the battery and the temperature-sensitive element of the present invention of polyhedral, and the intensity of temperature-sensitive element and thermal endurance are good, can the suppression element main body when therefore making and when using deform and situation that element characteristic changes.Therefore, the reliability of Current Control is good, when flowing through super-high-current and temperature can cut off the electric current road well when rising, have good fail safe.
Description of drawings
Fig. 1 is the stereogram of the packaged battery of expression embodiments of the present invention 1.
Fig. 2 is the stereogram of battery of the packaged battery of expression embodiments of the present invention 1.
Fig. 3 is the exploded perspective view of the battery of expression embodiments of the present invention 1.
Fig. 4 is the partial side view of the battery of expression embodiments of the present invention 1.
Fig. 5 is the cutaway view of the PTC element of expression embodiments of the present invention 1.
Fig. 6 is the vertical view that lead-in wire and the PTC element during adhesive linkage are removed in expression.
Fig. 7 is the stereogram of the packaged battery of expression embodiments of the present invention 2.
Fig. 8 is the stereogram of battery of the packaged battery of expression embodiments of the present invention 2.
Fig. 9 is the exploded perspective view of the battery of expression embodiments of the present invention 2.
Figure 10 represents it is the partial side view of battery of embodiments of the present invention 2.
Figure 11 is the cutaway view of the PTC element of expression embodiments of the present invention 2.
Figure 12 is the vertical view that lead-in wire and the PTC element during adhesive linkage are removed in expression.
Figure 13 is the vertical view of the state after the expression element body reduced.
Figure 14 is an exploded perspective view of representing the battery of packaged battery in the past.
Figure 15 is an end view of representing the PTC element of packaged battery in the past.
Figure 16 is an exploded perspective view of representing the battery of other packaged battery in the past.
Symbol description:
1,31 packaged batteries
2 batteries
21 housings
22 caps
The 22a valve that ftractures
23 negative terminals
3,33 battery
4 cover mold system portions
5,35PTC element
51 element portion
511,35a element body
512,35b surrounds frame
513,514,35e, 35f adhesive linkage
35c, 35d conductive plate
52,53,7,8,12,17 lead-in wires
6 element brackets
The 6a recess
9 protective circuit substrates
The 9a terminal
9b protective circuit installation portion
10 fixing seals
11 composite plates
The molded portion in 14 bottom surfaces
15 labels
18 insulation boards
Embodiment
Below, the accompanying drawing according to this execution mode of expression specifically describes the present invention.
Fig. 1 is the stereogram of the packaged battery 1 of expression embodiments of the present invention 1, and Fig. 2 is the stereogram of expression battery 3, and Fig. 3 is the exploded perspective view of expression battery 3, and Fig. 4 is the partial side view of expression battery 3.Among the figure, the part mark prosign identical with Figure 14 and Figure 16.And, in Fig. 2, omit protective circuit substrate 9.
The battery 3 of packaged battery 1 constitutes by having the protective circuit substrate (terminal substrate) 9 of three terminal 9a in the configuration of the outside of the cap 22 of the flat battery 2 of square and this protective circuit substrate 9 being electrically connected with battery 2.And under the state that exposes on the surface of terminal 9a, the cover mold system portion 4 seal protection circuit substrates 9 by for example polyamide etc., wiring etc., and the bottom surface by molded 14 clad battery 2 in bottom surface constitute packaged battery 1 thus.Each terminal 9a exposes from three 4a of window portion that are arranged in the cover mold system portion 4.
Molded 14 of cover mold system portion 4 and bottom surface can be inlayed to be shaped and be obtained by the resin that battery 3 is contained in mould and injection fusion.
Two planes of battery 3 and two side faces are covered by label 15.
The lithium rechargeable battery that battery 2 is used for the power supply of pocket telephone.Be contained in the housing 21 of rectangular-shaped Al after being chamfering or Al alloy system across the electrode group of the flat web-like that dividing plate coiling negative plate and positive plate form and nonaqueous electrolyte (not shown), wherein, negative plate is by forming at copper collector coating cathode agent, and positive plate is by forming at Al collector body coating anode mixture.The opening of housing 21 is by described cap 22 obturations of Al or Al alloy system.Be provided with than other parts thin thickness and at inner pressure of battery at cap 22 and rise to cracking under the situation more than the setting and cracking valve 22a that inner pressure of battery is discharged.
State with insulation on cap 22 is provided with negative terminal 23.The integral body that is provided with the part battery 2 in addition of negative terminal 23 is anodal (terminal).
PTC element (temperature-sensitive element) 5 possess tabular element portion 51 and with the lead-in wire (conductive plate) 52,53 of its two plane engagement.Extend to the outside of the length direction of element portion 51 end of lead-in wire 52,53.The lead-in wire 52 of PTC element 5 is connected with negative terminal 23 via lead-in wire 7.The opposing party's lead-in wire 53 is connected via the splicing ear (not shown) of lead-in wire 8 with the negative side of protective circuit substrate 9.
Be used for taking out electric power or the opposite positive terminal that is taken into electric power for charging from the outside and negative terminal (input and output terminal) and as above-mentioned terminal 9a, 9a, the 9a of temperature terminal by gold-plated being provided with at the outer surface of protective circuit substrate 9 to the outside.Protective circuit substrate 9 with 2 opposed on battery on be provided with protective circuit installation portion 9b, protective circuit is installed on it, and covers this protective circuit by the synthetic resin of insulating properties such as for example epoxy resin.
Between protective circuit substrate 9 and PTC element 5, be folded with insulation board 13.
The splicing ear of the side of the positive electrode of protective circuit substrate 9 (not shown) via the lead-in wire 12 be arranged on cap 22 on be connected by this two-layer composite plate that constitutes 11 of Ni layer and Al layer.
Fig. 5 is the cutaway view of expression PTC element 5, and Fig. 6 is the vertical view that lead-in wire 52 and 513,514 o'clock PTC element 5 of adhesive linkage are removed in expression.
The element portion 51 of PTC element 5 forms by the metallic that disperses Ni for example etc. in the macromolecule of for example polyethylene etc., possess resistance corresponding to the tabular element body 511 of variations in temperature and separate predetermined distance surround this element body 511 four sides for example by Al
2O
3Encirclement frame 512 Deng the pottery formation.Whole of each plane that surrounds each the architrave face of frame 512 and element body 511 engages with the described lead-in wire 52,53 of for example Ni system by adhesive linkage 513, the adhesive linkage 514 that contains metals such as solder or Ni.
As long as the size of element body 511 and shape can bring into play requirement disconnection element characteristic such as operating temperature and can discharge.In addition, element body 511 and the gap that surrounds frame 512 element body 511 such as be set at when producing overcurrent can thermal expansion.
In the present embodiment, because element body 511 is by lead-in wire 52,53 and surround frame 512 coverings, therefore in PTC element 5 and cap 22 being carried out resin molded operation etc., when external force acts on PTC element 5 and when conducting heat, can suppress the influence that element body 511 is brought.Therefore, do not need to apply element body 511 by the synthetic resin of insulating properties.In addition, owing to surround the rigidity and the intensity height of frame 512, therefore when unusual, do not produce or reduce the stress of the deflection of the cap 22 when expanding based on battery 2 on element body 511, the element characteristic of PTC element 5 is difficult to change.And, also can protection component main body 511 when packaged battery 1 falls down.
Therefore, the PTC element 5 of packaged battery 1 has the good reliability of Current Control, has good quality stability and fail safe.
In addition, in the present embodiment, illustrated that packaged battery 1 possesses the situation of element bracket 6, but be not limited to this.As mentioned above, because at external force and heat protection component main body 511 well, therefore mounting insulation board and omitting under the situation of element bracket 6 on cracking valve 22a also can be kept the element characteristic of PTC element 5 well.
Fig. 7 is the stereogram of the packaged battery 31 of expression embodiments of the present invention 2, and Fig. 8 is the stereogram of the battery 33 of expression packaged battery 31, and Fig. 9 is the exploded perspective view of expression battery 33, and Figure 10 is the partial side view of expression battery 33.Among the figure, the part mark prosign identical with the packaged battery 1 of execution mode 1 also omits detailed explanation.In addition, in Fig. 8, omit protective circuit substrate 9.
In the packaged battery 31 of embodiments of the present invention 2, the method for attachment of the structure of PTC element 35, negative terminal 23, PTC element 35 and protective circuit substrate 9 is different with the packaged battery 1 of execution mode 1.
The battery 33 of packaged battery 31 constitutes by being electrically connected with battery 2 at the outside configuration protection circuit substrate 9 of the cap 22 of the flat battery 2 of square and with this protective circuit substrate 9.And under the state that exposes on the surface of terminal 9a, the cover mold system portion 4 seal protection circuit substrates 9 by for example polyamide etc., wiring etc., and the bottom surface by molded 14 clad battery 2 in bottom surface constitute packaged battery 31 thus.
Figure 11 is the cutaway view of the PTC element 35 that possessed of expression packaged battery 31, and Figure 12 is the vertical view of the PTC element 35 of expression when removing lead-in wire 35c and adhesive linkage 35e, 35f.
The metallic of Ni etc. forms PTC element 35 by for example for example disperseing in macromolecules such as polyethylene, possess resistance corresponding to the tabular element body 35a of variations in temperature, separate predetermined distance surround this element body 35a four sides for example by Al
2O
3Encirclement frame 35b, conductive plate (lead-in wire) 35c, the 35d of for example Ni system Deng the pottery formation.Whole of each plane that surrounds each the architrave face of frame 35b and element body 35a engages with described conductive plate 35c, 35d by adhesive linkage 35e, the adhesive linkage 35f that contains metals such as solder or Ni.
As long as the size of element body 35a and shape can bring into play requirement disconnection element characteristic such as operating temperature and can discharge.In addition, element body 35a and the gap that surrounds frame 35b element body 35a such as be set at when producing overcurrent can thermal expansion.
In the battery 33 of present embodiment, mounting insulation board 18 on the cracking valve 22a of cap 22.
Lead-in wire 17 is by constituting the long limit of two boards of rectangular shaped is connected to each other, under the rectangular state of two boards a side board is connected with negative terminal 23.Coating solder paste and mounting PTC element 35 on protective circuit substrate 9; after by reflow soldering furnace conductive plate 35c being brazed in protective circuit substrate 9; with the board spot welding of conductive plate 35d, thus protective circuit substrate 9 is electrically connected with negative terminal 23 with the opposing party of lead-in wire 17.Afterwards, 17 bendings that will go between so that 17 two boards of going between are involutory, thus protective circuit substrate 9 with the inside and cap 22 opposed state configuration on cap 22.
The splicing ear of the side of the positive electrode of protective circuit substrate 9 (not shown) via the lead-in wire 12 be arranged on cap 22 on be connected by this two-layer composite plate that constitutes 11 of Ni layer and Al layer.
In the present embodiment, by carrying out above-mentioned reflow soldering, can realize the simplification that is connected operation of PTC element 35 and battery 2.
In the present embodiment, the size of setting conductive plate 35c, 35d can be crossed, guaranteeing to weld needed area, and size and the shape of setting member main body 35a simultaneously, thereby the element characteristic that requires can be realized.As the shape of element body 35a and an example of size, enumerate the rectangular plate shape of 3mm * 4mm, but in order further to reduce operating temperature, as shown in figure 13, can change to for example rectangular plate shape of 2mm * 4mm, perhaps, can also change to the discoideus of diameter 3mm in order further to reduce operating temperature.
In the present embodiment, element body 35a is covered by conductive plate 35c, 35d and encirclement frame 35b.Therefore, in formation operation of above-mentioned reflow soldering operation and cover mold system portion 4 etc., when masterpiece is used for PTC element 35 outside and when conducting heat and when the bending operation China and foreign countries of above-mentioned lead-in wire 17 masterpiece is used for PTC element 35, can suppress the influence that element body 35a is brought.Therefore, do not need to apply element body 35a by the synthetic resin of insulating properties.In addition, owing to surround rigidity and the intensity height of frame 35b, therefore when unusual, do not produce or reduce the stress of the deflection of the cap 22 when expanding based on battery 2 on element body 511, the element characteristic of PTC element 35 is difficult to change.And, also can protection component main body 35a when packaged battery 31 falls down.
Therefore, in the packaged battery 31, PTC element 35 has the good reliability of Current Control, has good quality stability and fail safe.
In addition, in above-mentioned execution mode 1 and 2, the material that uses macromolecular has been described as the element body 511 of PTC element 5,35, the situation of 35a, but has been not limited to this, also can use the material of pottery system.
In addition, the situation that encirclement frame 512,35b are made of ceramic material has been described, but has been not limited to this,, also can constitute by mica or synthetic resin etc. as long as intensity and thermal endurance are good and have insulating properties.
And, in above-mentioned execution mode 1 and 2, illustrated by inlaying forming process and partly formed the situation of cover mold system portion 4 in the lid side of the battery 2 that disposes PTC element 5,35, but be not limited to this, also can be applicable to type, battery 3,33 is accommodated in type in the plastic external shell, the packaged battery of type etc. by heat-shrinkable pipe clad battery core 3,33 by four sides of the plastic outer body clad battery core 3,33 that frames up.
In addition, in above-mentioned execution mode 1 and 2, illustrated that battery 2 is the situation of lithium rechargeable battery, but be not limited to this, also can be other batteries such as nickel-hydrogen secondary cell, NI-G secondary cell.The shape of battery is also unqualified to be the square tabular, can also be for cylindric etc.Purposes is not defined as the power supply as pocket telephone yet.
And, in above-mentioned execution mode 1 and 2, illustrated and used PTC element 5,35 situations, but be not limited to this that the present invention goes for the NTC element as temperature-sensitive element.
And,, unqualified for being suitable for the situation of the protective circuit substrate that protective circuit has been installed as the terminal substrate.
And temperature-sensitive element of the present invention also can be applicable to beyond the battery, can be applicable to various electronic equipments.
Claims (7)
1. temperature-sensitive element, it possess resistance corresponding to the tabular element body of variations in temperature and with two conductive plates of two plane engagement of this element body, described temperature-sensitive element is characterised in that,
The encirclement frame that possesses the side that surrounds described element body,
Each conductive plate engages with each plane of described element body and each architrave face of described encirclement frame.
2. temperature-sensitive element according to claim 1 is characterized in that,
On described conductive plate, be provided with to the extended extension in the outside of described encirclement frame.
3. temperature-sensitive element according to claim 1 and 2 is characterized in that,
Described encirclement frame is made of ceramic material.
4. according to each described temperature-sensitive element in the claim 1 to 3, it is characterized in that,
Described element body is included in the PTC composition that is dispersed with electric conductor in the macromolecule.
5. packaged battery is characterized in that possessing:
The battery of polyhedral;
Each described temperature-sensitive element in one side's conductive plate and the claim 1 to 4 that described battery is electrically connected.
6. packaged battery according to claim 5 is characterized in that possessing:
The terminal substrate, itself and described one surface of battery arranged opposite, and have the terminal that is used for to this battery input and output electric power;
Resinous molded portion, it covers described one side and terminal substrate under the state that described terminal exposes,
The opposing party's of described temperature-sensitive element conductive plate is electrically connected with described terminal substrate.
7. packaged battery according to claim 6 is characterized in that,
Described the opposing party's conductive plate is connected in described terminal substrate by reflow soldering.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010011290A JP2011151207A (en) | 2010-01-21 | 2010-01-21 | Thermal element and battery pack |
| JP2010-011290 | 2010-01-21 |
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| Publication Number | Publication Date |
|---|---|
| CN102136402A true CN102136402A (en) | 2011-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100252507A Pending CN102136402A (en) | 2010-01-21 | 2011-01-20 | Temperature-sensitive element and packaged battery |
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| CN (1) | CN102136402A (en) |
Cited By (4)
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|---|---|---|---|---|
| CN104756304A (en) * | 2012-08-10 | 2015-07-01 | Fdk株式会社 | Alkaline battery |
| CN106653257A (en) * | 2015-10-30 | 2017-05-10 | 松下能源(无锡)有限公司 | PTC device used for battery pack and battery pack provided with same |
| CN111872558A (en) * | 2020-07-28 | 2020-11-03 | 合肥国轩高科动力能源有限公司 | Method for improving welding quality of lithium ion battery shell and cover plate |
| TWI763438B (en) * | 2021-04-16 | 2022-05-01 | 宏碁股份有限公司 | Battery module and method for suppressing battery swelling |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130101871A1 (en) * | 2011-10-20 | 2013-04-25 | Bohyun Byun | Protective circuit module and battery pack having the same |
| JP7433796B2 (en) * | 2019-07-24 | 2024-02-20 | デクセリアルズ株式会社 | protection element |
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| JP2004228044A (en) * | 2003-01-27 | 2004-08-12 | Sanyo Electric Co Ltd | Battery pack |
| JP2005317454A (en) * | 2004-04-30 | 2005-11-10 | Sanyo Electric Co Ltd | Pack battery |
| JP2005346945A (en) * | 2004-05-31 | 2005-12-15 | Sanyo Electric Co Ltd | Battery pack |
| CN201294240Y (en) * | 2008-07-15 | 2009-08-19 | 成都建中锂电池有限公司 | Lithium battery with safety device |
| WO2009148152A1 (en) * | 2008-06-06 | 2009-12-10 | タイコ エレクトロニクス レイケム株式会社 | Ptc device |
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| JP2004228044A (en) * | 2003-01-27 | 2004-08-12 | Sanyo Electric Co Ltd | Battery pack |
| JP2005317454A (en) * | 2004-04-30 | 2005-11-10 | Sanyo Electric Co Ltd | Pack battery |
| JP2005346945A (en) * | 2004-05-31 | 2005-12-15 | Sanyo Electric Co Ltd | Battery pack |
| WO2009148152A1 (en) * | 2008-06-06 | 2009-12-10 | タイコ エレクトロニクス レイケム株式会社 | Ptc device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104756304A (en) * | 2012-08-10 | 2015-07-01 | Fdk株式会社 | Alkaline battery |
| CN106653257A (en) * | 2015-10-30 | 2017-05-10 | 松下能源(无锡)有限公司 | PTC device used for battery pack and battery pack provided with same |
| CN106653257B (en) * | 2015-10-30 | 2020-08-07 | 松下能源(无锡)有限公司 | PTC device for battery pack and battery pack having the same |
| CN111872558A (en) * | 2020-07-28 | 2020-11-03 | 合肥国轩高科动力能源有限公司 | Method for improving welding quality of lithium ion battery shell and cover plate |
| TWI763438B (en) * | 2021-04-16 | 2022-05-01 | 宏碁股份有限公司 | Battery module and method for suppressing battery swelling |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011151207A (en) | 2011-08-04 |
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Application publication date: 20110727 |