CN216015604U - Battery with a battery cell - Google Patents
Battery with a battery cell Download PDFInfo
- Publication number
- CN216015604U CN216015604U CN202122668337.8U CN202122668337U CN216015604U CN 216015604 U CN216015604 U CN 216015604U CN 202122668337 U CN202122668337 U CN 202122668337U CN 216015604 U CN216015604 U CN 216015604U
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- explosion
- proof
- area
- battery
- proof valve
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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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Abstract
The present application provides a battery, comprising: a body and a protective film. The body is provided with an explosion-proof valve. The protection film parcel body, the protection film include parcel district and explosion-proof district, and parcel district and explosion-proof district are integrated into one piece's integral type structure, and explosion-proof district covers explosion-proof valve. According to the battery provided by the application, when the gas generated in the battery cell is discharged through the explosion-proof valve, the gas breaks through the explosion-proof area to crack the explosion-proof area, so that the gas is discharged into the air from the battery cell, and the probability of explosion of the battery is reduced; because the wrapping area and the explosion-proof area are integrally formed to form the protective film, the problem that the viscosity of the explosion-proof valve protective patch is reduced and the explosion-proof valve protective patch is easy to fall off after the explosion-proof valve protective patch is used for a long time in the prior art because the explosion-proof valve protective patch and the protective film belong to two different parts is solved, the explosion-proof area has a good protective effect on the explosion-proof valve, and the use reliability of a product is ensured.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a battery.
Background
Be provided with the explosion-proof valve on the new forms of energy lithium ion battery, when gaseous explosion-proof point critical value that reaches, the explosion-proof valve is direct-traffic with outside in the twinkling of an eye, and a large amount of gas discharges, and the inside powerful pressure of quick release cavity avoids exploding or reduces the explosion harm. In order to avoid the accidental touch of the explosion-proof valve, the explosion-proof valve needs to be protected, the conventional mode is that a protection patch is pasted on the surface of the explosion-proof valve, and because the protection patch and a blue film belong to two different parts respectively, the viscosity of the protection patch is easy to lose efficacy after long-time use, so that the bonding effect between the protection patch and the blue film is poor, the protection patch is easy to fall off to expose the explosion-proof valve, and the explosion-proof valve cannot be protected; in addition, the battery is easy to enter the battery through the gap between the protection patch and the blue film after water enters the battery, so that the explosion-proof valve body is soaked.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a simple structure, explosion-proof valve protect effectual and explosion-proof effectual battery.
To achieve the above object, the present application provides a battery including: the anti-explosion valve comprises a body, wherein the body is provided with an anti-explosion valve; the body is wrapped by the protective film, the protective film comprises a wrapping area and an explosion-proof area, the wrapping area and the explosion-proof area are integrally formed into an integral structure, and the explosion-proof area covers the explosion-proof valve.
Compared with the prior art, the technical scheme has the following advantages: because the wrapping area and the explosion-proof area are integrally formed to form the protective film, the problem that the viscosity of the explosion-proof valve protective patch is reduced and the explosion-proof valve protective patch is easy to fall off after the explosion-proof valve protective patch is used for a long time in the prior art because the explosion-proof valve protective patch and the protective film belong to two different parts is solved, the explosion-proof area has a good protective effect on the explosion-proof valve, and the use reliability of a product is ensured.
Drawings
The drawings are only for purposes of illustrating and explaining the present application and are not to be construed as limiting the scope of the present application. Wherein:
FIG. 1 is a schematic structural view of a first embodiment of a battery according to the present application;
FIG. 2 is a schematic view, partially in section, of a battery according to the present application;
FIG. 3 is a schematic structural view of a second embodiment of a battery according to the present application;
FIG. 4 is a schematic structural view of a third embodiment of a battery according to the present application;
FIG. 5 is a schematic structural view of a fourth embodiment of a battery according to the present application;
FIG. 6 is a partial schematic structural view of a first embodiment of a frangible portion as described herein;
FIG. 7 is a schematic view, partly in section, of a second embodiment of a weakening as described in the present application;
FIG. 8 is a partial schematic structural view of a third embodiment of a frangible portion as described herein;
FIG. 9 is a schematic view, partly in section, of a first embodiment of a protective film according to the present application;
fig. 10 is a schematic partial cross-sectional structure of a second embodiment of the protective film described in the present application.
The reference numbers illustrate:
10. an electric core; 20. an explosion-proof valve; 30. a housing; 31. an explosion-proof hole; 40. a protective film; 41. a parcel area; 42. an explosion-proof area; 43. a weakened portion.
Detailed Description
The present application is described in further detail below with reference to the figures and examples. The features and advantages of the present application will become more apparent from the description.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not conflict with each other. The following discussion provides a number of embodiments of the application. While each embodiment represents a single combination of applications, the various embodiments of the disclosure may be substituted or combined in any combination, and thus, the disclosure is intended to include all possible combinations of the same and/or different embodiments of what is described. Thus, if one embodiment comprises A, B, C and another embodiment comprises a combination of B and D, then this application should also be considered to comprise an embodiment that comprises A, B, C, D in all other possible combinations, although this embodiment may not be explicitly recited in the text below. In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1 to 10, the present application provides a battery including: a body and a protective film 40.
The body is provided with an explosion-proof valve. As shown in fig. 2, in an embodiment of the present application, the body includes a battery cell 10 and a casing 30; the shell 30 is provided with an explosion-proof valve 20; the housing 30 wraps the battery cell 10, and the housing 30 is provided with an explosion-proof hole 31 for installing the explosion-proof valve 20.
As shown in fig. 2, the protection film 40 wraps the body, the protection film 40 includes a wrapping area 41 and an explosion-proof area 42, the wrapping area 41 and the explosion-proof area 42 are integrally formed into an integral structure, and the explosion-proof area 42 covers the explosion-proof valve 20. The explosion proof zone 42 covers an area greater than the area of the explosion proof valve 20.
When the gas generated in the battery cell 10 is discharged through the explosion-proof valve 20, the gas breaks through the explosion-proof area 42 to crack the explosion-proof area, so that the gas is discharged from the battery cell 10 into the air, and the explosion probability of the battery is reduced; because the wrapping area 41 and the explosion-proof area 42 are integrally formed to form the protection film 40, the problem that the viscosity of the explosion-proof valve protection patch is reduced and the explosion-proof valve protection patch is easy to fall off after the explosion-proof valve protection patch is used for a long time in the prior art because the explosion-proof valve protection patch and the protection film 40 belong to two different parts respectively is solved, so that the explosion-proof area 42 plays a good role in protecting the explosion-proof valve 20, and the use reliability of a product is ensured.
Several embodiments of blast resistant section 42 are described in detail below with reference to the figures.
Example one
As shown in fig. 1 to 8, in one embodiment of the present application, the explosion-proof area 42 is provided with a weak portion 43, and the weak portion 43 is formed in a linear shape. The line type includes a straight line, a broken line, a curved line, a dotted line, a double line, etc., which are not exemplified herein, and those skilled in the art can select a corresponding line type to make the weak portion 43 as required.
When the gas discharged from the explosion-proof valve 20 impacts the explosion-proof area 42, the strength of the weak part 43 is weak, and the explosion-proof area 42 is rapidly broken by the gas from the weak part 43, so that the gas is rapidly discharged, the potential safety hazard is eliminated, and the probability of explosion of the battery is reduced.
As shown in fig. 1, in one embodiment of the present application, the weakened portion 43 is provided at the edge of the explosion-proof area 42 and is provided along the circumferential direction of the explosion-proof area 42. That is, the weak portion 43 is annular, so that the weak portion 43 has a larger area, and the explosion-proof area 42 is more easily broken when being impacted by gas, so that the explosion-proof area 42 is quickly broken by gas, and the gas is quickly discharged, thereby eliminating potential safety hazards and reducing the probability of explosion of the battery.
As shown in fig. 3, in one embodiment of the present application, the circumferential length of the weakened portion 43 around the blast-proof zone 42 is 50% to 95% of the length of the edge of the blast-proof zone 42, i.e. the weakened portion 43 is in the form of an open ring. After the gas breaks the explosion-proof area 42 through the weak part 43, the weak part 43 is in an unclosed annular shape, so that the explosion-proof area 42 does not fall off from the protective film, and the condition that the falling sundries need to be cleaned manually due to the fact that the explosion-proof area 42 integrally falls off to form the sundries is avoided.
In one embodiment of the present application, the weak portion 43 has a linear shape as shown in fig. 4, or the weak portion 43 has a cross shape as shown in fig. 5, or the weak portion has a net shape. The end of the weakened portion extends to the edge of the blast protected area.
As shown in fig. 6, in one embodiment of the present application, the weakened portion 43 is a groove. In one embodiment of the present application, as shown in fig. 7, the cross-sectional area of the groove is gradually reduced in a direction from the opening of the groove to the bottom wall of the groove, i.e., a sharp corner is formed on the bottom wall of the groove. Stress is easily concentrated at the sharp corners, and when the gas discharged from the explosion-proof valve 20 impacts, the weak parts 43 are more easily broken at the sharp corners, so that the explosion-proof area 42 is quickly broken by the gas, the gas is quickly discharged, potential safety hazards are eliminated, and the probability of explosion of the battery is reduced. In addition, the explosion-proof area 42 and the wrapping area 41 are of an integrated structure, no gap exists between the explosion-proof area 42 and the wrapping area 41, the situation that the explosion-proof valve 20 is soaked after water enters the battery is avoided, and therefore the use safety of the battery is guaranteed.
Of course, the cross-sectional shape of the groove can also be circular, rectangular, or elliptical, and the cross-sectional shape of the groove can be selected by those skilled in the art according to specific needs.
In one embodiment of the present application, the width D of the groove is 0.5mm to 3mm, as shown in FIG. 6. If the width of the groove is larger than 3mm, the width of the groove is larger, so that the weak part 43 is easy to break when being subjected to smaller external force, and the explosion-proof area 42 is damaged, and the explosion-proof valve 20 is exposed; if the width of the groove is less than 0.5mm, the width of the groove is small, when the groove is impacted by gas exhausted from the explosion-proof valve 20, the weak part 43 is not easily broken, so that the gas cannot be quickly exhausted into the air to cause thermal runaway, therefore, the width D of the groove is within 0.5 mm-3 mm, the weak part 43 can be broken after being subjected to certain external force, the explosion-proof area 42 plays a good role in protecting the explosion-proof valve 20, and the use reliability of a product is ensured; in addition, when the gas discharged from the explosion-proof valve 20 impacts the explosion-proof area 42, the explosion-proof area 42 is rapidly broken by the gas from the weak portion 43, so that the gas is rapidly discharged, thereby eliminating a safety hazard and reducing the possibility of explosion of the battery.
As shown in fig. 8, in one embodiment of the present application, the weak portion 43 is a perforation. The tooth holes are small holes, and water has surface tension, so that the surface of the water is the same as that of a thin film capable of bearing certain tension, and when the pore diameter of the tooth holes is small, the water cannot enter the battery through the tooth holes. The condition that the explosion-proof valve 20 is soaked after water enters the battery is avoided, and therefore the use safety of the battery is guaranteed. Specifically, the radius of the perforation is R, the water surface tension is a, and the additional pressure P is 2 a/R. Therefore, the smaller the radius R of the perforation, the greater the pressure P for passing water through the perforation, and therefore, when the diameter of the perforation is small, water cannot enter the inside of the battery through the perforation after the battery is filled with water. In a specific embodiment of the present application, the tooth holes are blind holes, that is, the tooth holes do not penetrate through the protective film 40, and no gap exists between the explosion-proof area 42 and the wrapping area 41, so that the situation that the explosion-proof valve 20 is immersed after the water enters the battery is avoided, and the use safety of the battery is ensured.
Example two
In one embodiment of the present application, as shown in fig. 9, the thickness of the blast-resistant zone 42 is less than the thickness of the wrapping zone 41.
Because the thickness of the explosion-proof area 42 is less than that of the wrapping area 41, the overall strength of the explosion-proof area 42 is weaker, and when gas exhausted from the explosion-proof valve 20 impacts the explosion-proof area 42, the explosion-proof area 42 can be rapidly broken, so that the gas is rapidly exhausted, potential safety hazards are eliminated, and the probability of battery explosion is reduced. In addition, the explosion-proof area 42 and the wrapping area 41 are of an integrated structure, no gap exists between the explosion-proof area 42 and the wrapping area 41, the situation that the explosion-proof valve 20 is soaked after water enters the battery is avoided, and therefore the use safety of the battery is guaranteed.
In one embodiment of the present application, the thickness of the burst disk 42 tapers from the edge of the burst disk 42 to the middle of the burst disk 42, as shown in figure 10.
The thickness of the edge of the explosion-proof area 42 is large, so that the connection strength between the explosion-proof area 42 and the wrapping area 41 is ensured, the probability that the explosion-proof valve 20 is exposed due to the fact that the explosion-proof area 42 and the wrapping area 41 are broken in the using process is reduced, and the using reliability of the product is ensured. The middle part of the explosion-proof area 42 has a small thickness, and when the gas discharged from the explosion-proof valve 20 impacts the explosion-proof area 42, the middle part of the explosion-proof area 42 can be rapidly burst, so that the gas is rapidly discharged, the potential safety hazard is eliminated, and the probability of explosion of the battery is reduced.
In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise explicitly stated or limited. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The present application has been described above with reference to preferred embodiments, but these embodiments are merely exemplary and merely illustrative. On the basis of the above, the present application can be subjected to various substitutions and improvements, and the substitutions and the improvements are all within the protection scope of the present application.
Claims (9)
1. A battery, comprising:
the anti-explosion valve comprises a body, wherein the body is provided with an anti-explosion valve; and
the protection film wraps the body, the protection film comprises a wrapping area and an explosion-proof area, the wrapping area reaches the explosion-proof area is of an integrated structure, and the explosion-proof area covers the explosion-proof valve.
2. The battery according to claim 1,
the explosion-proof area is provided with a weak part which is linear.
3. The battery according to claim 2,
the weak part is arranged at the edge of the explosion-proof area and is arranged along the circumferential direction of the explosion-proof area.
4. The battery according to claim 3,
the circumferential length of the weak part around the explosion-proof area is 50% -95% of the length of the edge of the explosion-proof area.
5. The battery according to claim 2,
the weak portion is linear.
6. The battery according to any one of claims 2 to 5,
the weak part is a groove.
7. The battery according to any one of claims 2 to 5,
the weak part is a tooth hole.
8. The battery according to claim 1,
the thickness of the explosion-proof area is smaller than that of the wrapping area.
9. The battery according to claim 8,
from the edge of the explosion-proof area to the middle of the explosion-proof area, the thickness of the explosion-proof area is gradually reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122668337.8U CN216015604U (en) | 2021-11-02 | 2021-11-02 | Battery with a battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122668337.8U CN216015604U (en) | 2021-11-02 | 2021-11-02 | Battery with a battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216015604U true CN216015604U (en) | 2022-03-11 |
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ID=80586143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122668337.8U Active CN216015604U (en) | 2021-11-02 | 2021-11-02 | Battery with a battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216015604U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115395155A (en) * | 2022-08-18 | 2022-11-25 | 华为数字能源技术有限公司 | Battery pack, energy storage system and electric automobile |
| CN116706459A (en) * | 2023-08-07 | 2023-09-05 | 深圳海辰储能控制技术有限公司 | Outer envelope, energy storage device and electric equipment |
| WO2024098898A1 (en) * | 2022-11-08 | 2024-05-16 | 欣旺达动力科技股份有限公司 | Battery cell and electric device |
-
2021
- 2021-11-02 CN CN202122668337.8U patent/CN216015604U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115395155A (en) * | 2022-08-18 | 2022-11-25 | 华为数字能源技术有限公司 | Battery pack, energy storage system and electric automobile |
| CN115395155B (en) * | 2022-08-18 | 2024-06-04 | 华为数字能源技术有限公司 | Battery pack, energy storage system and electric automobile |
| WO2024098898A1 (en) * | 2022-11-08 | 2024-05-16 | 欣旺达动力科技股份有限公司 | Battery cell and electric device |
| CN116706459A (en) * | 2023-08-07 | 2023-09-05 | 深圳海辰储能控制技术有限公司 | Outer envelope, energy storage device and electric equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee after: Zhongchuangxin Aviation Technology Co.,Ltd. Address before: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee before: AVIC lithium Technology Co.,Ltd. Address after: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee after: AVIC lithium Technology Co.,Ltd. Address before: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee before: AVIC lithium Technology Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |