CN201717324U - Rechargeable battery integrated with protection device - Google Patents
Rechargeable battery integrated with protection device Download PDFInfo
- Publication number
- CN201717324U CN201717324U CN201020178286XU CN201020178286U CN201717324U CN 201717324 U CN201717324 U CN 201717324U CN 201020178286X U CN201020178286X U CN 201020178286XU CN 201020178286 U CN201020178286 U CN 201020178286U CN 201717324 U CN201717324 U CN 201717324U
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- CN
- China
- Prior art keywords
- rechargeable battery
- cover plate
- joint pin
- protective device
- battery
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- 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
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- Y02E60/122—
Abstract
The utility model discloses a rechargeable battery integrated with a protection device, which comprises a casing and a connecting post. An electrode pile and electrolyte are contained inside the casing, a cover plate is integrally arranged on the casing, the connecting post extending out of the inside of the casing is electrically insulated from the cover plate, and the protection device arranged on the connecting post is directly electrically connected with the connecting post. By directly arranging the protection device on the connecting post, the rechargeable battery can reduce impedance of an integral battery set, improve performance of the battery set and prolong the service life.
Description
Technical field
The utility model relates to a kind of rechargeable battery, particularly, relates to a kind of rechargeable battery with protective device.
Background technology
In the portable electric or electronic installation such as mobile phone, notebook computer, digital camera, to use the rechargeable battery such as lithium ion battery, think that electronic installation provides the energy.PTC (positive temperature coefficient) parts in this rechargeable battery, are equipped with; particularly PPTC (high molecular polymer positive-temperature-coefficient) parts are as protective device; preventing short circuit when rechargeable battery charging or the discharge, overcurrent perhaps prevents the abnormal high temperature of battery overcharge.
Fig. 1 is the schematic perspective view that shows traditional rechargeable battery.For example the rechargeable battery 100 of lithium ion type comprises: as the housing 101 of an electrode in two extraction electrodes (for example anodal), integratedly be arranged on the housing 101 cover plate 111 and as the outer joint pin 102 of another electrode in two extraction electrodes (for example negative pole), wherein be provided with insulating material between joint pin 102 and the cover plate 111, between the two, to realize electric insulation.Joint pin is generally rivet arrangement and is arranged on the cover plate 111 of rechargeable battery 100.Fig. 2 is the cross-sectional schematic that shows traditional rechargeable battery configuration protection device shown in Figure 1.This protective device is a PTC (positive temperature coefficient) parts 103, and comprises: have the polymer elements 104 of conductivity, be configured in the metal conducting layer of for example being made by nickel sheet or foil material 105 and 106 of polymer elements 104 both sides, the articulamentum 108 that is for example formed by electroconductive binder or solder paste that is configured in conductive layer 107 on the metal level 105, is welded on the conductive layer 110 on the cover plate 111 and is used to be electrically connected conductive layer 106 and conductive layer 110 by at least two weld parts 109 respectively.In said structure; this conductive layer 110 and be electrically connected by articulamentum 108 as the conductive layer 106 of one of them electrode of PTC parts 103; conductive layer 107 as another electrode of PTC parts 103 is connected with the protective circuit plate or the external circuit (not shown) of Li-Ion rechargeable battery 100; thereby PTC parts 103 are connected between rechargeable battery 100 and the external circuit, realize the overcurrent of 103 pairs of rechargeable batteries 100 of PTC parts and/or the safety protection function that overcharges.
In above-mentioned traditional rechargeable battery that is provided with protective device 100, need be at first by weld part 109 connecting conductive layers 110 on cover plate 111.This conductive layer 110 for example can be formed by the nickel sheet, and general thickness is the 0.05-2.0 millimeter.Extra nickel sheet with this thickness is connected with the positive pole or the negative pole (conductive layer 105 or 106) of rechargeable battery 100, has caused the internal resistance of rechargeable battery 100 to increase, and has reduced the efficient of rechargeable battery itself; This extra nickel sheet also can cause the heat transferred loss of rechargeable battery, to such an extent as to the additives for overcharge protection effect of PTC parts 103 is weakened or additives for overcharge protection starts hysteresis; In addition, the introducing of the conductive layer 110 of articulamentum 108 and nickel sheet form also makes the complicated and manufacturing cost raising of manufacturing process of rechargeable battery 100.
The content of utility model
The technical problem that the utility model solved is to provide a kind of rechargeable battery that is integrated with protective device, and its protective device is set directly on the joint pin, can reduce the impedance of whole battery group, improves the performance of battery pack, prolongs the service time of battery.
According to an aspect of the present utility model, a kind of rechargeable battery that is integrated with protective device is provided, comprising: housing, described enclosure interior hold electrodes heap and electrolyte are provided with cover plate integratedly on the described housing; And from described enclosure interior protruding and with the joint pin of described cover plate electric insulation, on described joint pin, be provided with the protective device that directly is electrically connected with described joint pin.
In above-mentioned rechargeable battery, described protective device is the positive temperature coefficient parts.
In above-mentioned rechargeable battery, described positive temperature coefficient parts comprise: the polymer elements with conductivity; And first conductive layer that is configured in first side of described polymer elements.
In above-mentioned rechargeable battery, second side relative with described first side of described polymer elements is electrically connected with described joint pin by welding or conductive adhesive.
In above-mentioned rechargeable battery, described joint pin is the structure of rivet arrangement or nut bolt combination.
In above-mentioned rechargeable battery, described cover plate is provided with through hole, and described electrolyte supplies in the described housing by described through hole, and described through hole is provided with lid.
In above-mentioned rechargeable battery, described cover plate is provided with the thin layer that is used as safety valve.
According to rechargeable battery of the present utility model, on joint pin, be provided with protective device, press close to battery as the PTC parts of protective device, with the battery hot link, can provide better (excess temperature) defencive function that overcharges; The protective device of Li-Ion rechargeable battery is set directly on the joint pin, and do not need to be used as the articulamentum or the intercell connector of syndeton, can simplify the manufacturing process of follow-up battery pack like this, reduce use length, quantity and the spot welding number of times of nickel strap, thereby reduced the manufacturing cost of whole battery group; Improve the battery size space; Further, can reduce the impedance of whole battery group, improve the performance of battery pack, prolong the service time of battery.
Description of drawings
The present invention further describes with reference to the accompanying drawings, wherein:
Fig. 1 is the schematic perspective view that shows traditional rechargeable battery;
Fig. 2 is the cross-sectional schematic that shows traditional rechargeable battery configuration protection device shown in Figure 1;
Fig. 3 shows according to the vertical view with rechargeable battery of protective device of the present utility model; And
Fig. 4 is the partial sectional view that shows along the A-A line among Fig. 3.
Embodiment
Though fully describe the utility model with reference to the accompanying drawing that contains preferred embodiment of the present utility model, but before describing, this should be appreciated that those of ordinary skill in the art can revise utility model described herein, obtains technique effect of the present utility model simultaneously.Therefore, must understand above description to those of ordinary skill in the art and Yan Weiyi discloses widely, and its content does not lie in the described exemplary embodiment of restriction the utility model.
Referring to accompanying drawing 3 and 4, wherein Fig. 3 shows that according to the vertical view with rechargeable battery of protective device of the present utility model Fig. 4 is the partial sectional view that shows along the A-A line among Fig. 3.Rechargeable battery 10 according to a kind of exemplary embodiment of the present utility model for example can be a kind of Li-Ion rechargeable battery, comprise: housing, described housing is for example made by sheet metals such as aluminium, steel, and its inside holds electrode stack and the electrolyte that is used to produce electric energy, is provided with cover plate 1 on the described housing integratedly; And from cover plate 1 inner protruding and with the joint pin 2 of cover plate 1 by insulating material 4 electric insulations, on joint pin 2, be provided with the protective device 3 that directly is electrically connected with joint pin 2.In the inside of cover plate 1, also be electrically connected with current collection element 5 at joint pin 2.For example, cover plate 1 can be the positive pole of rechargeable battery 10, and joint pin 2 and current collection element 5 can be the negative poles of rechargeable battery 10.
In a kind of exemplary embodiment of the present utility model, protective device 3 is positive temperature coefficient (PTC) parts, further, can be high molecular polymer positive-temperature-coefficient (PPTC) parts.This positive temperature coefficient parts comprise: the polymer elements 6 with conductivity; And first conductive layer 7 that is configured in first side of polymer elements 6.Polymer elements 6 is generally stratiform, and is formed by the electric conductive polymer (for example polyethylene) that is dispersed with as the carbon black of conductive filling.Conductive layer 7 as extraction electrode for example can be conductivity good metal sheets such as nickel sheet, nickel plating steel disc, copper sheet, aluminum-nickel compound piece.Further, second side relative with described first side of polymer elements 6 is connected with the surface electrical that is exposed to cover plate 1 outside of joint pin 2 by welding.Joint pin 2 be by electric conductivity good such as nickel, steel, the metal material of copper and so on is made rivet arrangement.Particularly, joint pin 2 comprises column part and the flange portion that radially extends from an end of column part.Column part extends to the inside of cover plate 1 from the outside of cover plate 1, flange portion is exposed to the outside of cover plate 1, and an end that is positioned at cover plate 1 inside of column part is electrically connected with current collection element 5 by the riveted joint mode.Because the flange portion of joint pin 2 has relative thicker thickness with column part; thereby allow directly to adopt reflow soldering process to be connected electrically on the flange portion of joint pin 2 polymer elements 6 of protective device 3 by welding or conductive adhesive; it is as a whole that the joint pin 2 of PTC parts and rivet arrangement is formed, and can not destroy the structure of joint pin 2 itself and influence the electric conductivity of joint pin.Alternatively, an end that is positioned at cover plate 1 inside of column part has screw thread, and joint pin 2 is the nut bolt structure, thereby by the bolt and nut connected mode current collection element 5 is electrically connected with column part.Further alternatively, an end that is positioned at cover plate 1 inside of column part can directly be electrically connected with current collection element 5 by welding.
In said structure; protective device 3 is that polymer elements 6 is electrically connected with joint pin 2; thereby make the electrode of joint pin 2 as protective device 3; and first conductive layer 7 is electrically connected as another electrode of protective device (positive temperature coefficient parts) 3 and with the protective circuit plate or the external circuit (not shown) of Li-Ion rechargeable battery 10; thereby protective device 3 is connected between rechargeable battery 10 and the external circuit, realizes that protective device is to the overcurrent of rechargeable battery 10 and/or the safety protection function that overcharges.
According to Li-Ion rechargeable battery 10 of the present utility model, on joint pin 2, be provided with protective device, can avoid rechargeable battery 10 because of short circuit, overcharge and defective that safety issue that unusual condition such as overcurrent causes and reliability reduce; The PTC parts of rechargeable battery 10 are pressed close to battery, with the battery hot link, can provide better (excess temperature) defencive function that overcharges; The protective device 3 of Li-Ion rechargeable battery 10 is set directly on the joint pin 2, and do not need to be used as the articulamentum (for example nickel sheet, paillon foil etc.) of syndeton, can simplify the manufacturing process of follow-up battery pack (power brick) like this, reduce use length, quantity and the spot welding number of times of nickel strap, thereby reduced the manufacturing cost of whole battery group; Owing to do not need to be used as the articulamentum (for example nickel sheet, paillon foil etc.) of syndeton, reduced solder joint, reduced the impedance of whole battery group thus, improved the performance of battery pack, prolonged the service time of battery.
Be in the exemplary embodiment further, cover plate 1 is provided with through hole 8, electrolyte can be supplied in the cover plate 1 by through hole 8, and through hole 8 is provided with the lid (not shown), seals with the inside to cover plate 1.Can further be provided with the thin layer 9 that is used as safety valve on the cover plate 1, with when the internal pressure of cover plate 1 is big, film 9 breaks automatically, prevents whole rechargeable battery explosion.Further, may also be provided with supplementary structures such as fixed groove on the cover plate 1 as the loam cake of rechargeable battery 10.
According to exemplary embodiment further of the present utility model, second side relative with first side (that side of first conductive layer 7 promptly is set) in polymer elements 6 can be provided with second conductive layer, and described second conductive layer is electrically connected with joint pin 2 by welding.
After describing preferred embodiment of the present utility model in detail; those of ordinary skill in the art can clearly understand; under protection range that does not break away from the claim of enclosing and spirit, can carry out various variations and change, and the utility model also is not subject to the execution mode of the exemplary embodiment of lifting in the specification.
Claims (7)
1. rechargeable battery that is integrated with protective device comprises:
Housing, described enclosure interior hold electrodes heap and electrolyte are provided with cover plate integratedly on the described housing; And
From described enclosure interior protruding and with the joint pin of described cover plate electric insulation,
It is characterized in that, on described joint pin, be provided with the protective device that directly is electrically connected with described joint pin.
2. rechargeable battery as claimed in claim 1 is characterized in that, described protective device is the positive temperature coefficient parts.
3. rechargeable battery as claimed in claim 2 is characterized in that, described positive temperature coefficient parts comprise:
Polymer elements with conductivity; And
Be configured in first conductive layer of first side of described polymer elements.
4. rechargeable battery as claimed in claim 3 is characterized in that, second side relative with described first side of described polymer elements is electrically connected with described joint pin by welding or conductive adhesive.
5. as each the described rechargeable battery among the claim 1-4, it is characterized in that described joint pin is the structure of rivet arrangement or nut bolt combination.
6. as each the described rechargeable battery among the claim 1-4, it is characterized in that described cover plate is provided with through hole, described electrolyte supplies in the described housing by described through hole, and described through hole is provided with lid.
7. as each the described rechargeable battery among the claim 1-4, it is characterized in that described cover plate is provided with the thin layer that is used as safety valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020178286XU CN201717324U (en) | 2010-04-29 | 2010-04-29 | Rechargeable battery integrated with protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020178286XU CN201717324U (en) | 2010-04-29 | 2010-04-29 | Rechargeable battery integrated with protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201717324U true CN201717324U (en) | 2011-01-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020178286XU Expired - Lifetime CN201717324U (en) | 2010-04-29 | 2010-04-29 | Rechargeable battery integrated with protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201717324U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428016A (en) * | 2017-08-30 | 2019-03-05 | 宁德时代新能源科技股份有限公司 | Secondary cell's top cap subassembly and secondary cell |
-
2010
- 2010-04-29 CN CN201020178286XU patent/CN201717324U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428016A (en) * | 2017-08-30 | 2019-03-05 | 宁德时代新能源科技股份有限公司 | Secondary cell's top cap subassembly and secondary cell |
| CN109428016B (en) * | 2017-08-30 | 2021-05-18 | 宁德时代新能源科技股份有限公司 | Secondary cell's top cap subassembly and secondary cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: The Caohejing Development Zone of Shanghai City, Qinzhou road 200233 No. 307 Patentee after: Shanghai Li Tao Electronics Co., Ltd. Address before: The Caohejing Development Zone of Shanghai City, Qinzhou road 200233 No. 307 Patentee before: Raychem Electronics (Shanghai) Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110119 |