CN204348811U - A kind of safety device of lithium ion battery - Google Patents
A kind of safety device of lithium ion battery Download PDFInfo
- Publication number
- CN204348811U CN204348811U CN201420834527.XU CN201420834527U CN204348811U CN 204348811 U CN204348811 U CN 204348811U CN 201420834527 U CN201420834527 U CN 201420834527U CN 204348811 U CN204348811 U CN 204348811U
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- Prior art keywords
- conducting strip
- pole
- lithium ion
- ion battery
- safety device
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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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- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model belongs to technical field of lithium ion, be specifically related to a kind of safety device of lithium ion battery, comprise coping plate, the first pole, the second pole, rotating sheet and conducting strip, described first pole and described second pole are placed in described coping plate, described first pole and described conducting strip insulate and assemble, described rotating sheet is arranged between described first pole and conducting strip, and described rotating sheet is electrically connected with described first pole and described conducting strip respectively, described conducting strip is provided with concave surface, and described concave surface is provided with indentation.Lithium ion battery is provided with rotating sheet and the conducting strip of electrical connection mutually; conducting strip is provided with concave surface, and is provided with indentation in concave surface, during to ensure that inside lithium ion cell air pressure reaches limit value, concave surface can be broken through by air pressure effectively; to disconnect charge circuit, play the effect of safeguard protection.
Description
Technical field
The utility model belongs to technical field of lithium ion, is specifically related to a kind of safety device of lithium ion battery.
Background technology
Along with the development of modern society and the enhancing of people's environmental consciousness, electric automobile more and more tends to use lithium ion battery as its energy source.Electrokinetic cell not only should possess high power capacity, also should have good fail safe and cycle life.In order to ensure the fail safe of electrokinetic cell to a certain extent, generally on battery cap, a relief valve is installed, when battery meets accident in the adverse circumstances such as high temperature due to improper charging, short circuit or be exposed to, high-octane battery will produce a large amount of gas and temperature sharply raises, and gas washes the object that relief valve reaches pressure release open.The existence of relief valve can improve the security performance of battery to a certain extent, but the energy assembled due to the battery itself met accident can not get release, battery is a hidden danger body inherently, there is certain safety problem, if continue overcharge again after battery meets accident, then can cause larger security incident.
Therefore in order to improve the fail safe using lithium ion battery, market there is the safety device of lithium ion battery, this device can disconnect charging circuit when battery overcharges accident, stop the charging to battery, thus improve the fail safe overcharged, such as number of patent application be 201320886713.3 innovation and creation disclose a kind of lithium ion battery safety device with rotating sheet, pressure official post rotating sheet is utilized to overturn, to disconnect the electrical connection of charge circuit, prevent the potential safety hazard that over-charging of battery causes.But because rotating sheet and conducting strip weld together, can not ensure that rotating sheet departs from conducting strip in the effect of pressure differential.
Utility model content
The purpose of this utility model is: for the deficiencies in the prior art, provides a kind of safety device of lithium ion battery, and this device can disconnect charging circuit when battery overcharges accident, stops the charging to battery, thus improves the fail safe overcharged.
For achieving the above object, the utility model adopts following technical scheme: a kind of safety device of lithium ion battery, comprise coping plate, the first pole, the second pole, rotating sheet and conducting strip, described first pole and described second pole are placed in described coping plate respectively, described first pole and described conducting strip insulate and assemble, described rotating sheet is arranged between described first pole and conducting strip, and described rotating sheet is electrically connected with described first pole and described conducting strip respectively, described conducting strip is provided with concave surface, and described concave surface is provided with indentation.Concave surface is the weakness of conducting strip, can from the weakness of conducting strip when inside battery air pressure reaches limit value---concave surface breaks through to be held, first the indentation that concave surface is arranged can allow conducting strip tear apart from indentation when making air pressure reach limit value, ensure that conducting strip can be broken through out under limit value air pressure, and conducting strip can be controlled be limited in the scope that indentation encloses by the position broken through out.
One as the safety device of a kind of lithium ion battery of the utility model is improved, and described concave surface is provided with jig, and described rotating sheet is welded on described jig, and described jig is located in the scope that described indentation encloses.Because described jig is located in the scope that described indentation encloses, after being torn out outside indentation, being also just disconnected the connection of rotating sheet and conducting strip, being namely disconnected charge circuit, prevent from overcharging, play the effect of safeguard protection.
One as the safety device of a kind of lithium ion battery of the utility model is improved, and described conducting strip two sides is equipped with indentation, and the indentation described in two sides is about the plane symmetry at described conducting strip place.Two sides is equipped with symmetrical indentation, and further ensuring conducting strip under limit value air pressure can be broken through out.
One as the safety device of a kind of lithium ion battery of the utility model is improved, and the thickness of described concave surface is 0.3mm ~ 2mm.
One as the safety device of a kind of lithium ion battery of the utility model is improved, and the degree of depth of described indentation is 0.04 ~ 0.1mm.
One as the safety device of a kind of lithium ion battery of the utility model is improved, and described rotating sheet and described jig are by laser penetration seal welding.Ensure the electrical connection of rotating sheet and conducting strip, prevent rosin joint.
One as the safety device of a kind of lithium ion battery of the utility model is improved, and the shape of described indentation is rectangle, circle, fan-shaped, oval, trapezoidal or triangle.
One as the safety device of a kind of lithium ion battery of the utility model is improved, described first pole by weld or rivet or jump ring assembling be electrically connected with described coping plate.
One as the safety device of a kind of lithium ion battery of the utility model is improved, and described conducting strip can be rectangle, circle or oval.
The beneficial effects of the utility model are: the safety device providing a kind of lithium ion battery; lithium ion battery is provided with rotating sheet and the conducting strip of electrical connection mutually; conducting strip is provided with concave surface; and be provided with indentation in concave surface; during to ensure that inside lithium ion cell air pressure reaches limit value, concave surface can be broken through by air pressure effectively; to disconnect charge circuit, play the effect of safeguard protection.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is part A enlarged drawing in Fig. 1.
Fig. 3 is the view after the utility model conducting strip indentation place tears.
Fig. 4 is that the utility model conducting strip one side is provided with score structure schematic diagram.
Fig. 5 is that the utility model conducting strip two sides is provided with symmetrical score structure schematic diagram.
Fig. 6 is the utility model rotating sheet structural representation.
Wherein, 1. coping plate, 2. the first pole, 3. the second pole, 4. rotating sheet, 5. conducting strip, 6. concave surface, 7. indentation, 8. jig.
Embodiment
Below in conjunction with embodiment and Figure of description, the utility model and beneficial effect thereof are described in further detail, but embodiment of the present utility model is not limited thereto.
See Fig. 1-6, a kind of safety device of lithium ion battery, comprise coping plate 1, first pole 2, second pole 3, rotating sheet 4 and conducting strip 5, conducting strip 5 is rectangle, first pole 2 and the second pole 3 are placed in coping plate 1 respectively, and the first pole 2 and conducting strip 5 insulate and assemble, rotating sheet 4 is arranged between the first pole 2 and conducting strip 5, and rotating sheet 4 is electrically connected with the first pole 2 and conducting strip 5 respectively, conducting strip 5 is provided with concave surface 6, and the thickness of concave surface 6 is 1mm, and concave surface 6 is provided with indentation 7, the degree of depth of indentation 7 is 0.03mm, and the scope that indentation 7 encloses shows rectangle.Concave surface 6 is provided with jig 8, and rotating sheet 4 and jig 8 are by laser penetration seal welding, and jig 8 is located in the scope that indentation 7 encloses.
As preferably, conducting strip two sides is equipped with indentation 7, and the indentation 7 on two sides is about the plane symmetry at conducting strip 5 place, and the degree of depth of the indentation 7 on two sides is 0.03mm.
As preferably, the thickness of concave surface 6 is except the arbitrary value in 1mm in 0.3mm ~ 2mm, and the degree of depth of indentation 7 is except the arbitrary value in 0. 03mm in 0.04 ~ 0.1mm.
As preferably, indentation 7 can also be circular, fan-shaped, oval, trapezoidal or triangle, and conducting strip 5 also can be circular or oval.
As preferably, the first pole 2 is electrically connected with coping plate 1 by welding, riveted joint or jump ring assembling.
When lithium ion battery is due to improper charging, when short circuit or be exposed to meets accident in the adverse circumstances such as high temperature, high-octane battery will produce a large amount of gas and temperature sharply raises, inside lithium ion cell air pressure is raised, when air pressure reaches 0.3 ~ 0.6MPa, conducting strip 5 is broken through at its concave surface 6 place, the rotating sheet 4 welded together with jig 8 overturns (in 1MPa atmospheric pressure value, rotating sheet 4 can not break), the position simultaneously making conducting strip 5 indentation 7 enclose is torn out along indentation 7 place, to disconnect the charge circuit of lithium ion battery, play the effect of safeguard protection.That is, rotating sheet 4 can limit instantaneous upset under air pressure and conducting strip 5 is torn out along indentation 7 place, disconnect rotating sheet 4 and the electrical connection of conducting strip 5, the battery met accident can be made to stop charging by device of the present utility model, prevent the potential safety hazard that over-charging of battery causes.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also change above-mentioned execution mode and revise.Therefore, the utility model is not limited to above-mentioned embodiment, and any apparent improvement of every those skilled in the art done by basis of the present utility model, replacement or modification all belong to protection range of the present utility model.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (9)
1. the safety device of a lithium ion battery, comprise coping plate, the first pole, the second pole, rotating sheet and conducting strip, described first pole and described second pole are placed in described coping plate, described first pole and described conducting strip insulate and assemble, described rotating sheet is arranged between described first pole and described conducting strip, and described rotating sheet is electrically connected with described first pole and described conducting strip respectively, it is characterized in that: described conducting strip is provided with concave surface, and described concave surface is provided with indentation.
2. the safety device of a kind of lithium ion battery according to claim 1, is characterized in that: described concave surface is provided with jig, described rotating sheet is welded on described jig, and described jig is located in the scope that described indentation encloses.
3. the safety device of a kind of lithium ion battery according to claim 1, is characterized in that: described conducting strip two sides is equipped with indentation, and the indentation described in two sides is about the plane symmetry at described conducting strip place.
4. the safety device of a kind of lithium ion battery according to claim 1, is characterized in that: the thickness of described concave surface is 0.3mm ~ 2mm.
5. the safety device of a kind of lithium ion battery according to claim 1, is characterized in that: the degree of depth of described indentation is 0.04 ~ 0.1mm.
6. the safety device of a kind of lithium ion battery according to claim 2, is characterized in that: described rotating sheet and described jig are by laser penetration seal welding.
7. the safety device of a kind of lithium ion battery according to claim 1, is characterized in that: the shape of described indentation is rectangle, circle, fan-shaped, oval, trapezoidal or triangle.
8. the safety device of a kind of lithium ion battery according to claim 1, is characterized in that: described first pole is electrically connected with described coping plate by welding, riveted joint or jump ring assembling.
9. the safety device of a kind of lithium ion battery according to claim 1, is characterized in that: described conducting strip can be rectangle, circle or oval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420834527.XU CN204348811U (en) | 2014-12-25 | 2014-12-25 | A kind of safety device of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420834527.XU CN204348811U (en) | 2014-12-25 | 2014-12-25 | A kind of safety device of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204348811U true CN204348811U (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420834527.XU Active CN204348811U (en) | 2014-12-25 | 2014-12-25 | A kind of safety device of lithium ion battery |
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| Country | Link |
|---|---|
| CN (1) | CN204348811U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577029A (en) * | 2014-12-25 | 2015-04-29 | 宁德新能源科技有限公司 | Safety device for lithium ion battery |
| US10804522B2 (en) | 2016-02-25 | 2020-10-13 | Byd Company Limited | Single-cell battery, battery module, power battery, and electric vehicle |
| US11728505B2 (en) | 2017-12-22 | 2023-08-15 | Byd Company Limited | Battery cover plate assembly comprising a current interrupt apparatus |
-
2014
- 2014-12-25 CN CN201420834527.XU patent/CN204348811U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577029A (en) * | 2014-12-25 | 2015-04-29 | 宁德新能源科技有限公司 | Safety device for lithium ion battery |
| US10804522B2 (en) | 2016-02-25 | 2020-10-13 | Byd Company Limited | Single-cell battery, battery module, power battery, and electric vehicle |
| US11728505B2 (en) | 2017-12-22 | 2023-08-15 | Byd Company Limited | Battery cover plate assembly comprising a current interrupt apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |