CN2862336Y - Square secondary cell - Google Patents
Square secondary cell Download PDFInfo
- Publication number
- CN2862336Y CN2862336Y CNU200520127384XU CN200520127384U CN2862336Y CN 2862336 Y CN2862336 Y CN 2862336Y CN U200520127384X U CNU200520127384X U CN U200520127384XU CN 200520127384 U CN200520127384 U CN 200520127384U CN 2862336 Y CN2862336 Y CN 2862336Y
- Authority
- CN
- China
- Prior art keywords
- groove
- battery
- central slot
- battery case
- end recesses
- 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
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- 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
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- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
A square secondary battery includes body structure forming battery, wherein the battery casing of the body structure includes a groove disposed at a site on the battery casing closed to corner, the groove includes of middle groove and head groove, and the end of the middle groove is communicated with the head groove. The utility model rearranges the position and shape of the safety groove on the battery casing and has the advantages of high sensitivity to voltage release, good consistency, simple structure, and convenience for manufacturing.
Description
Technical field
The utility model is about a kind of secondary cell, especially about a kind of rectangular secondary cell that is provided with safety groove.
Background technology
Rectangular secondary cell, especially square lithium ion secondary battery, because abuse as overcharge, cross put, violent bump etc., perhaps unusual short circuit takes place in battery, may gather a large amount of heats and gas in inside battery moment, make cell internal pressure raise rapidly, cause battery blast, on fire, thereby cause the destruction of battery, even jeopardize user security.
At present secondary cell relies on the external circuit protection on the one hand, adopts on the other hand that local weak structure is set on battery case is explosion-proof.CN 2423659Y is by punching press on the battery seal cover plate, and distortion forms the meshing structure of the plane of disruption with explosion-proof.CN 2133055Y delineates or suppresses groove, the weak link that formation can be reduced pressure at the bottom of battery case.But the former difficulty of processing is big, precision requirement height, cost height; The position that the two is the most fragile when all the position being set not raising for inner pressure of battery because of safety groove, and make the break reliability and the promptness of pressure release be difficult to guarantee.CN 2379916Y is filled with the blast resistance construction of metal or synthetic resin encapsulant at the sidewall ditch groove of battery case in this groove; But this safety device complex structure, the production cost height.
CN 2529389Y discloses a kind of hermetically sealed explosion-proof lithium battery, it comprises the agent structure that constitutes hermetically sealed lithium battery, it is characterized in that, offer on the metal shell in this agent structure and make shell local weak, the groove that helps pressure release when inner pressure of battery is unexpected to be increased, described groove straight line, " ten " font or " Y " font groove for offering along the battery case bus.CN 2373901Y is provided with the groove that is " * " shape in the broad face center of battery case.But along the battery case bus or in wide centre of battery case groove is set, can influences the mechanical strength of battery case, reduce the impact resistance of battery and the performance of extruding.
In sum, the explosion-proof groove location of prior art secondary cell the most fragile position when being arranged at the bottom of battery cover board, the shell etc. and not raising, the reliability and the promptness of the pressure release that is difficult to guarantee to break for inner pressure of battery; But be arranged on the mechanical strength that battery case bus, wide centre can influence battery case again.In addition, the groove of " ten ", " Y ", " * " shape in the prior art when inner pressure of battery raises, breaks earlier in the position, crosspoint, moment the scope of breaking little, breach is irregular, influences pressure release sensitivity and consistency.
The utility model content
The purpose of this utility model is the shortcoming that overcomes that the blast resistance construction pressure release sensitivity of prior art rectangular secondary cell is low, consistency is poor, can not take into account mechanical strength, provides that a kind of pressure release is highly sensitive, high conformity, rectangular secondary cell that mechanical strength is high.
The utility model provides a kind of rectangular secondary cell, and this battery comprises the agent structure that constitutes battery, comprises groove on the battery case in the described agent structure, and wherein, described groove is arranged on battery case near corner location; Described groove comprises central slot and end recesses, and the end of described central slot communicates with end recesses.
Rectangular secondary cell provided by the utility model, because the battery case groove comprises central slot and end recesses, the end of described central slot communicates with end recesses; When inner pressure of battery raise unusually, the cell expansion distortion was broken the central slot place of safety groove earlier, and is extended rapidly along end recesses, and the required time that breaks is short, the breach rule; And the groove of " ten " of the prior art, " Y ", " * " shape when inner pressure of battery raises, breaks earlier in the position, crosspoint, moment the scope of breaking little, breach is irregular, thereby the utility model has improved the pressure release sensitivity and the consistency of battery.In addition, groove is arranged on battery case near corner positions, more helps improving the promptness of battery pressure release.Because rectangular secondary cell provided by the utility model, the residual thickness of groove battery case is bigger than the residual thickness of prior art, thereby has further ensured the mechanical strength of battery.Simultaneously rectangular secondary cell provided by the utility model has also overcome the shortcoming of above-mentioned CN 2423659Y and the disclosed battery anti-explosion structure of CN 2379916Y requirement on machining accuracy height, complex process, has the advantage that processing is easy, cost is low.
Description of drawings
Fig. 1-2 is the schematic perspective view of the utility model rectangular secondary cell;
Fig. 3-the 7th, the utility model rectangular secondary cell groove planar structure schematic diagram.
Among the figure: the 1-battery case; The 2-safety groove; The 3-central slot; The 4-end recesses; The wide face length of 5-limit; Wide minor face of 6-.
Embodiment
The rectangular secondary cell that the utility model provides comprises the agent structure that constitutes battery, comprises groove on the battery case in the described agent structure, and wherein, described groove is arranged on battery case near corner location; Described groove comprises central slot and end recesses, and the end of described central slot communicates with end recesses.
Under the preferable case, described groove is arranged on wide of battery case.When inner pressure of battery raise, the wide face of described battery case was comparatively fragile position, battery case surface.
The residual thickness of described groove battery case is the 0.005-0.13 millimeter.When residual thickness is lower than 0.005 millimeter, processing difficulties, and make the housing part too weak easily, and be difficult to guarantee the mechanical strength of battery, cause the outer casing rupture leakage; When residual thickness during, then can not play the effect of the pressure release of breaking rapidly greater than 0.13 millimeter.
The described groove gross area accounts for the 1/60-1/20 of wide area of battery case.When described groove gross area proportion less than 1/60 the time, can influence the promptness and the sensitivity of pressure release; And when described groove gross area proportion greater than 1/20 the time, can influence the mechanical strength of battery case again.
Under the preferable case, described end recesses is a symmetrical centre with the central slot mid point, or is that symmetry axis forms symmetry or near symmetrical structure with the central slot center line.When dilatancy, break earlier in the central slot place of safety groove, and extend along end recesses, because above-mentioned symmetrical structure, and the high conformity of pressure release that therefore breaks, and the safety groove of processing this kind structure also guarantees its homogeneity easily.
Described central slot is linear pattern groove, shaped form groove, broken line type groove or their combination.The various linear structures of above-mentioned central slot all can make the pressure release of battery break and carry out along the line style trend of central slot, and make the end that breaks in central slot continue to extend to end recesses.
Described end recesses is linear pattern groove, shaped form groove, broken line type groove or their combination.The various linear structures of above-mentioned end recesses all can make the pressure release of battery break and extend rapidly along end recesses, thereby make the required time that breaks short, the breach rule.The bar number of the end recesses of described central slot one end is the 1-4 bar.If the bar number of a described end end recesses is more than 4, processing difficulties not only, and make the housing part too weak easily, be difficult to guarantee the due mechanical strength of battery; If the bar number of a described end end recesses is lower than 1, then be difficult to play the effect of rapid pressure release.A preferred described end end recesses is 2 linear pattern grooves.
In conjunction with the embodiments the utility model is elaborated below with reference to accompanying drawing.
As shown in Figure 1, described safety groove (2) is arranged on wide close position, the upper left corner of battery case (1), and end recesses (4) is that symmetry axis forms symmetrical structure with central slot (3) center line.Central slot is a straight line type groove, and the end recesses of central slot one end is 2 linear pattern grooves.The described groove gross area accounts for 1/30 of wide area of battery case, and the residual thickness of groove battery case is 0.005 millimeter.
As shown in Figure 2, described safety groove (2) is arranged on wide close position, the upper right corner of battery case (1), and end recesses (4) is that symmetry axis forms symmetrical structure with central slot (3) center line.Central slot is a straight line type groove, and the end recesses of central slot one end is 2 linear pattern grooves.The described groove gross area accounts for 1/35 of wide area of battery case, and the residual thickness of groove battery case is 0.008 millimeter.
As shown in Figure 3, described safety groove (2) is arranged on wide close position, the lower left corner of battery case (1), and end recesses (4) is that symmetry axis forms symmetrical structure with central slot (3) center line.Central slot is a shaped form groove, and the end recesses of central slot one end is 2 linear pattern grooves.The described groove gross area accounts for 1/40 of wide area of battery case, and the residual thickness of groove battery case is 0.009 millimeter.
As shown in Figure 4, described safety groove (2) is arranged on wide close position, the lower right corner of battery case (1), and end recesses (4) is that symmetry axis forms symmetrical structure with central slot (3) center line.Central slot is a shaped form groove, and the end recesses of central slot one end is 2 linear pattern grooves.The described groove gross area accounts for 1/45 of wide area of battery case, and the residual thickness of groove battery case is 0.10 millimeter.
Embodiment 5
As shown in Figure 5, described safety groove (2) is arranged on wide close position, the upper left corner of battery case (1), and end recesses (4) is that symmetrical centre forms symmetrical structure with central slot (3) center.Central slot is a straight line type groove, and the end recesses of central slot one end is 2 linear pattern grooves.The described groove gross area accounts for 1/35 of wide area of battery case, and the residual thickness of groove battery case is 0.11 millimeter.
As shown in Figure 6, described safety groove (2) is arranged on wide close position, the upper left corner of battery case (1), and end recesses (4) is that symmetry axis forms symmetrical structure with central slot (3) center line.Central slot is straight line and the combined groove of curve, and the end recesses of central slot one end is 2 shaped form grooves.The described groove gross area accounts for 1/50 of wide area of battery case, and the residual thickness of groove battery case is 0.12 millimeter.
Embodiment 7
As shown in Figure 7, described safety groove (2) is arranged on wide close position, the upper left corner of battery case (1), and end recesses (4) is that symmetrical centre forms symmetrical structure with central slot (3) center.Central slot is a straight line type groove, and the end recesses of central slot one end is the combination of 1 linear pattern groove and 1 shaped form groove.The described groove gross area accounts for 1/30 of wide area of battery case, and the residual thickness of groove battery case is 0.13 millimeter.
Claims (8)
1. rectangular secondary cell, this battery comprises the agent structure that constitutes battery, comprises groove on the battery case in the described agent structure, it is characterized in that, described groove is arranged on battery case near corner location; Described groove comprises central slot and end recesses, and the end of described central slot communicates with end recesses.
2. according to the described battery of claim 1, it is characterized in that described groove is arranged on wide of battery case.
3. according to the described battery of claim 2, it is characterized in that the residual thickness of described groove battery case is the 0.005-0.13 millimeter.
4. according to the described battery of claim 2, it is characterized in that the described groove gross area accounts for the 1/60-1/20 of wide area of battery case.
5. according to the described battery of claim 1, it is characterized in that described end recesses is a symmetrical centre with the central slot mid point, or be that symmetry axis forms symmetry or near symmetrical structure with the central slot center line.
6. according to claim 1 or 4 described batteries, it is characterized in that described central slot is linear pattern groove, shaped form groove, broken line type groove or their combination.
7. according to claim 1 or 4 described batteries, it is characterized in that described end recesses is linear pattern groove, shaped form groove, broken line type groove or their combination.
8. according to the described battery of claim 7, it is characterized in that the bar number of the end recesses of described central slot one end is the 1-4 bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200520127384XU CN2862336Y (en) | 2005-10-10 | 2005-10-10 | Square secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200520127384XU CN2862336Y (en) | 2005-10-10 | 2005-10-10 | Square secondary cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2862336Y true CN2862336Y (en) | 2007-01-24 |
Family
ID=37659965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200520127384XU Expired - Lifetime CN2862336Y (en) | 2005-10-10 | 2005-10-10 | Square secondary cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2862336Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106981596A (en) * | 2015-10-02 | 2017-07-25 | 三星Sdi株式会社 | Secondary cell |
| CN109863620A (en) * | 2017-04-13 | 2019-06-07 | 株式会社Lg化学 | Secondary cell |
-
2005
- 2005-10-10 CN CNU200520127384XU patent/CN2862336Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106981596A (en) * | 2015-10-02 | 2017-07-25 | 三星Sdi株式会社 | Secondary cell |
| CN106981596B (en) * | 2015-10-02 | 2021-10-08 | 三星Sdi株式会社 | Secondary battery |
| CN109863620A (en) * | 2017-04-13 | 2019-06-07 | 株式会社Lg化学 | Secondary cell |
| CN109863620B (en) * | 2017-04-13 | 2021-12-24 | 株式会社Lg化学 | Secondary battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen BYD Lithium Battery Co., Ltd. Assignor: Biyadi Co., Ltd. Contract fulfillment period: 2008.4.25 to 2012.11.19 Contract record no.: 2008440000071 Denomination of utility model: Method for winding and controlling electric core of square secondary cell Granted publication date: 20070124 License type: Exclusive license Record date: 20080513 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.4.25 TO 2012.11.19 Name of requester: SHENZHEN BYD LITHIUM BATTERY CO., LTD. Effective date: 20080513 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen BYD Lithium Battery Co., Ltd. Assignor: Biyadi Co., Ltd. Contract fulfillment period: 2008.11.12 to 2014.4.30 Contract record no.: 2008440000368 Denomination of utility model: Method for winding and controlling electric core of square secondary cell Granted publication date: 20070124 License type: Exclusive license Record date: 20081113 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.11.12 TO 2014.4.30; CHANGE OF CONTRACT Name of requester: SHENZHEN CITY BIYADILI BATTERY CO., LTD. Effective date: 20081113 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070124 |
|
| EXPY | Termination of patent right or utility model |