CN209981283U - Battery top cap for preventing temperature rise inside square battery cell - Google Patents
Battery top cap for preventing temperature rise inside square battery cell Download PDFInfo
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- CN209981283U CN209981283U CN201920444278.6U CN201920444278U CN209981283U CN 209981283 U CN209981283 U CN 209981283U CN 201920444278 U CN201920444278 U CN 201920444278U CN 209981283 U CN209981283 U CN 209981283U
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- top cover
- film heat
- temperature rise
- battery cell
- top cap
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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
Abstract
The utility model provides a battery top cover for preventing temperature rise in a square battery cell, which comprises a top cover plate, a positive electrode component and a negative electrode component which are connected at two ends of the top cover plate, an explosion-proof valve structure which is arranged on the top cover plate, a liquid injection hole structure which is close to one end of the positive electrode component and a turnover valve structure which is close to one end of the negative electrode component, and is characterized by also comprising a film heat insulation sheet which is attached on the top cover plate, wherein the film heat insulation sheet covers the welding surface of a pole lug and the top cover plate and completely covers the welding part, and can effectively isolate the heat generated on the top cover from being transferred into a battery cell pole piece, thereby effectively preventing the temperature rise of the battery cell pole piece and avoiding the occurrence of side reaction in the battery cell, on the other hand, the film heat insulation sheet is provided with a bending part which can assist in guiding the bending and forming of the pole lug, can play insulating effect, omit the use of top cap piece lower surface insulating part.
Description
Technical Field
The utility model relates to a power battery technical field especially relates to a prevent battery top cap of inside temperature rise of square electricity core.
Background
As is well known, a lithium ion battery has the advantages of high cyclicity, no memory effect, high voltage platform, small self-discharge rate, high energy density, wide working range and the like, and in a wider working temperature range, the battery performance is improved along with the increase of temperature, but when the temperature exceeds a certain threshold value, side reactions occur inside the battery, which affects the cycle life of a battery cell and even causes safety accidents.
Generally speaking, the structure that contains on the top cap is connected through welding process to make its contact internal resistance great, when the heavy current passes through, the produced heat of top cap is far higher than the produced heat of the inside pole piece of electricity core, along with the increase of multiplying power, the difference in temperature of top cap and electricity core pole piece is also bigger and bigger, the produced heat of top cap passes through the welding seam and conducts the heat inside electric core, thereby leads to electric core pole piece temperature to rise, can accelerate the inside side reaction that appears of electric core, so that influence electric core cycle life.
Disclosure of Invention
In order to solve the problem, the invention provides the battery top cover for preventing the temperature rise in the square battery cell, and the temperature of the top cover can be effectively prevented from being transmitted to the battery cell pole piece by adding the thin film heat insulation sheet on the top cover, so that the temperature rise of the battery cell pole piece is effectively prevented, and the side reaction in the battery cell is avoided.
The invention provides a battery top cover for preventing temperature rise in a square battery cell, which adopts the technical scheme that the battery top cover comprises a top cover plate, a positive electrode component and a negative electrode component which are connected to two ends of the top cover plate, an explosion-proof valve structure arranged on the top cover plate, a liquid injection hole structure close to one end of the positive electrode component, a turnover valve structure close to one end of the negative electrode component, and a thin film heat insulation sheet attached to the lower surface of the top cover plate;
as an improvement, the positive pole assembly comprises a positive pole lug and a positive pole assembly; the negative electrode assembly comprises a negative electrode tab and a negative electrode column assembly;
further, the positive and negative electrode assemblies and the top cover plate are fixed by welding; ultrasonic welding or laser welding can be performed;
as an improvement, the film heat-insulating sheets comprise a first film heat-insulating sheet and a second film heat-insulating sheet which are respectively covered on the welding seams of the positive electrode lug, the negative electrode lug and the top cover plate;
as an improvement, the film heat insulation sheet comprises a body part, bent parts and through holes, the through holes are respectively in one-to-one correspondence with the liquid injection hole and the turnover valve, and the bent parts are positioned on two sides of the body part and used for assisting in bending and forming of the tabs and preventing the tabs from being inserted;
further, the thickness of the film heat insulation sheet is 1-5 mm;
as an improvement, the film heat insulation sheet can be in a square, U-shaped or other special-shaped structure;
as an improvement, the film heat insulation sheet is a material with strong insulation, high temperature resistance, oxidation resistance and flame retardant function,
as an improvement, the side of the film heat insulating sheet contacting with the tab has adhesiveness, which can enhance the adhesiveness.
Advantageous effects
The invention provides a battery top cover for preventing temperature rise in a square battery cell, which is characterized in that a thin film heat insulation sheet is additionally arranged on the lower surface of a top cover plate, covers the welding surface of a lug and the top cover plate and completely covers the welding position, so that heat generated on the top cover can be effectively isolated from being transferred to a battery cell pole piece, the temperature rise of the battery cell pole piece is effectively prevented, and side reaction in the battery cell is avoided.
Drawings
Fig. 1 is the utility model discloses a prevent battery top cap's of inside temperature rise of square electricity core structural schematic
FIG. 2 is a schematic structural view of an embodiment of the thin film heat shield of the present invention
FIG. 3 is a schematic structural view of another embodiment of the thin film heat shield of the present invention
In the figure, the meanings of all marks are 1 top cover plate, 2 anode tab, 3 cathode tab, 4 explosion-proof valve structure, 5 liquid injection hole structure, 6 turnover valve structure, 71 first film heat insulation sheet, 72 second film heat insulation sheet, 8 welding part, a body part, b bending part and c through hole.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," "upper," "lower," "left," "right," and the like in the description and claims of the present invention and the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances for describing embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The technical scheme of the battery top cover for preventing the temperature rise in the square battery cell shown in fig. 1 and fig. 2 is realized by the following mode, and the battery top cover comprises a top cover plate 1, a positive electrode assembly and a negative electrode assembly which are connected to two ends of the top cover plate 1, an explosion-proof valve structure 4 which is arranged on the top cover plate 1, a liquid injection hole structure 5 which is close to one end of the positive electrode assembly, a turnover valve structure 6 which is close to one end of the negative electrode assembly, and a thin film heat insulation sheet which is attached to the lower surface of the top cover plate 1;
as an improvement, the positive pole assembly comprises a positive pole tab 2 and a positive pole assembly; the negative electrode assembly comprises a negative electrode tab 3 and a negative electrode column assembly;
further, the positive electrode assembly, the negative electrode assembly and the top cover plate 1 are fixed through welding; ultrasonic welding or laser welding can be performed;
as an improvement, the film heat insulation sheet comprises a body part a, bent parts b and through holes c, the through holes are respectively in one-to-one correspondence with the liquid injection hole 5 and the turnover valve 6, and the bent parts b are positioned on two sides of the body part 1 and are used for assisting in bending and forming of the tabs and preventing the tabs from being inserted;
as an improvement, the film heat insulation sheets comprise a first film heat insulation sheet 71 and a second film heat insulation sheet 72, which respectively and completely cover the welding surfaces of the positive electrode tab 2, the negative electrode tab 3 and the top cover plate 1, and completely cover the welding position 8;
further, the thickness of the film heat insulation sheet is 1-5 mm;
as an improvement, the film heat insulation sheet can be in a square, U-shaped or other special-shaped structure;
as an improvement, the film heat insulation sheet is a material with strong insulation, high temperature resistance, oxidation resistance and flame retardant function,
as an improvement, the side of the film heat insulating sheet contacting with the tab has adhesiveness, which can enhance the adhesiveness.
In this embodiment, after the positive electrode pillar assembly and the negative electrode pillar assembly are respectively welded to the top cover plate 1, the body portions a of the first film heat insulating sheet 71 and the second film heat insulating sheet 72 are respectively adhered to the welding surfaces of the positive electrode tab, the negative electrode tab and the top cover plate 1, the film heat insulating sheets completely cover the welding portion 8, and the bending portion b is tilted downward and used for assisting the tab to be bent and formed so as to prevent interpolation; the through hole c on the first film heat insulating sheet 71 corresponds to the liquid injection hole 5, the through hole c on the second film heat insulating sheet 72 corresponds to the turning valve 6, and the through hole c is arranged to prevent the film heat insulating sheet from covering the liquid injection hole 5 and the turning valve 6, so that the liquid injection of the battery cell and the turning of the turning valve 6 under emergency conditions are influenced.
The above-described embodiment is only one of the embodiments within the spirit of the present invention, and various modifications may be made, and equivalents or modifications within the spirit of the present invention are included in the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a prevent battery top cap of inside temperature rise of square electric core, includes the top cap piece, connects the anodal subassembly and the negative pole subassembly at top cap piece both ends are installed explosion-proof valve structure on the top cap piece, be close to annotate liquid pore structure and being close to of anodal subassembly one end the upset valve structure of negative pole subassembly one end, its characterized in that still including attached the film heat insulating sheet of top cap piece lower surface.
2. The battery top cap for preventing the temperature rise inside the square battery cell of claim 1, wherein the thin film heat insulation sheet comprises a body portion, bent portions and through holes, the through holes are respectively in one-to-one correspondence with the liquid injection hole and the turning valve, and the bent portions are located at two sides of the body portion and are used for assisting in bending and forming of the tab to prevent the tab from being inserted.
3. The battery top cover for preventing the internal temperature rise of the square battery core according to claim 1, wherein the positive electrode assembly comprises a positive electrode tab, the negative electrode assembly comprises a negative electrode tab, the positive electrode assembly, the negative electrode assembly and the top cover plate are fixed by welding, and the thin film heat shield comprises a first thin film heat shield and a second thin film heat shield which are respectively covered on the welding surfaces of the positive electrode tab, the negative electrode tab and the top cover plate and completely cover the welding position.
4. The battery top cap for preventing temperature rise inside a square battery cell of claim 1, wherein the thickness of the thin film heat insulating sheet is 1-5 mm.
5. The battery top cover for preventing the internal temperature rise of the square battery cell of claim 1, wherein the thin film heat insulation sheet can be in a square, U-shaped or other special-shaped structure.
6. The battery top cap capable of preventing the temperature rise inside the square battery cell of claim 1, wherein the thin film heat insulation sheet is a material with strong insulation, high temperature resistance, oxidation resistance and flame retardant effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920444278.6U CN209981283U (en) | 2019-04-03 | 2019-04-03 | Battery top cap for preventing temperature rise inside square battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920444278.6U CN209981283U (en) | 2019-04-03 | 2019-04-03 | Battery top cap for preventing temperature rise inside square battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209981283U true CN209981283U (en) | 2020-01-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920444278.6U Active CN209981283U (en) | 2019-04-03 | 2019-04-03 | Battery top cap for preventing temperature rise inside square battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209981283U (en) |
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2019
- 2019-04-03 CN CN201920444278.6U patent/CN209981283U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518107 Xinwangda Industrial Park, No.18, Tangjia south, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |
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| CP03 | Change of name, title or address |