CN214957237U - Pressure relief structure of cylindrical lithium battery - Google Patents
Pressure relief structure of cylindrical lithium battery Download PDFInfo
- Publication number
- CN214957237U CN214957237U CN202121088773.1U CN202121088773U CN214957237U CN 214957237 U CN214957237 U CN 214957237U CN 202121088773 U CN202121088773 U CN 202121088773U CN 214957237 U CN214957237 U CN 214957237U
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- CN
- China
- Prior art keywords
- lithium battery
- cylindrical lithium
- thin layer
- battery shell
- closed
- 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.)
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Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 61
- 238000004880 explosion Methods 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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)
- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model provides a pressure relief structure of a cylindrical lithium battery, which comprises a non-closed ring thin layer and a cylindrical lithium battery shell; the non-closed ring thin layer is positioned on the inner side of one end of the cylindrical lithium battery shell, and the geometric circle center of the non-closed ring thin layer is superposed with the geometric circle center of the cylindrical lithium battery shell; the non-closed ring thin layer and the cylindrical lithium battery shell form an integral structure. The non-closed circular ring-shaped thin layer and the cylindrical lithium battery shell are designed integrally, the sealing performance of the lithium battery can be effectively ensured, and the welding firmness, safety and reliability of the cylindrical lithium battery are not influenced; meanwhile, the non-closed annular thin layer is arranged at one end of the cylindrical lithium battery, so that the damage to the adjacent battery can be effectively reduced when the cylindrical lithium battery is subjected to thermal runaway explosion, and the spreading of faults is inhibited.
Description
Technical Field
The utility model relates to a cylindrical lithium cell pressure release structure belongs to the explosion-proof technical field of lithium cell.
Background
With the application of lithium batteries in electric vehicles and portable electronic devices, the demand for high-energy-density and high-power lithium batteries is increasingly urgent, and the safety of the lithium batteries becomes a focus of attention. When the lithium cell is under the abuse circumstances such as overdischarge, overcharge and during the short circuit, the inside temperature of lithium cell can rise fast, causes electrolyte decomposition to produce gas, and lithium cell internal pressure sharply rises, does not take under the corresponding measure, and lithium cell trouble can further worsen fast, causes the thermal runaway, and lithium cell explosion, combustion failure.
The lateral wall of cylindrical lithium battery shell is weak area, and the damaged position of battery explosion probably lies in the casing lateral wall position when taking place the thermal runaway condition, and the great amount of high temperature conducting substance that erupts can further cause the damage to neighbouring battery, leads to the trouble to spread.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a cylindrical lithium cell pressure release structure, this cylindrical lithium cell pressure release structure's simple structure, sealing performance are good, explosion-proof pressure easily controls, can show the security performance that improves the lithium cell.
The utility model discloses a following technical scheme can realize.
The utility model provides a pressure relief structure of a cylindrical lithium battery, which comprises a non-closed ring thin layer and a cylindrical lithium battery shell; the non-closed ring thin layer is positioned on the inner side of one end of the cylindrical lithium battery shell, and the geometric circle center of the non-closed ring thin layer is superposed with the geometric circle center of the cylindrical lithium battery shell; the non-closed ring thin layer and the cylindrical lithium battery shell form an integral structure.
The width and the thickness of the non-closed circular ring thin layer can be adjusted.
The diameter and the height of the cylindrical lithium battery shell can be adjusted.
The thickness of the non-closed circular ring thin layer is smaller than that of the cylindrical lithium battery shell.
The beneficial effects of the utility model reside in that: the non-closed circular thin layer and the cylindrical lithium battery shell are designed integrally, so that the sealing performance of the lithium battery can be effectively ensured, and the welding firmness, safety and reliability of the cylindrical lithium battery are not influenced; meanwhile, the non-closed annular thin layer is arranged at one end of the cylindrical lithium battery, so that the damage to the adjacent battery can be effectively reduced when the cylindrical lithium battery is subjected to thermal runaway explosion, and the spreading of faults is inhibited.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
in the figure: 1-non-closed ring thin layer, 2-cylindrical lithium battery shell.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
Example 1
As shown in fig. 1, the pressure relief structure of the cylindrical lithium battery comprises a non-closed circular thin layer 1 and a cylindrical lithium battery shell 2, wherein the material of the non-closed circular thin layer 1 is consistent with that of the cylindrical lithium battery shell 2; the non-closed circular thin layer 1 is positioned on the inner side of one end of the cylindrical lithium battery shell 2, and the geometric center of the non-closed circular thin layer 1 is superposed with that of the cylindrical lithium battery shell 2; the non-closed annular thin layer 1 and the cylindrical lithium battery shell 2 form an integral structure.
Example 2
The protocol of example 1 was followed and:
the width and the thickness of the non-closed circular ring thin layer 1 can be adjusted.
Example 3
The protocol of example 1 was followed and:
the diameter and height of the cylindrical lithium battery case 2 can be adjusted.
Example 4
The protocol of example 1 was followed and:
the thickness of the non-closed circular ring thin layer 1 is smaller than that of the cylindrical lithium battery shell 2, so that high-pressure gas in the lithium battery can burst and release pressure conveniently, and explosion caused by overlarge internal pressure of the battery is avoided.
Example 5
Based on the above embodiment, specifically:
use the utility model discloses a during the cylindrical lithium battery shell of pressure release structure, when cylindrical lithium battery internal pressure was too big, non-closed shape ring thin layer can be broken to inside gas, reaches the pressure release purpose to prevent that internal pressure is too big, still be connected with cylindrical battery case through not closed part after the pressure release structure breaks, prevent to fall into the inside short circuit that causes of lithium cell group.
Claims (4)
1. The utility model provides a cylindrical lithium cell pressure release structure, includes non-closed shape ring thin layer (1) and cylindrical lithium cell casing (2), its characterized in that: the non-closed circular thin layer (1) is positioned on the inner side of one end of the cylindrical lithium battery shell (2), and the geometric circle center of the non-closed circular thin layer (1) is superposed with the geometric circle center of the cylindrical lithium battery shell (2); the non-closed circular ring thin layer (1) and the cylindrical lithium battery shell (2) form an integral structure.
2. The cylindrical lithium battery pressure relief structure of claim 1, wherein: the width and the thickness of the non-closed circular ring thin layer (1) can be adjusted.
3. The cylindrical lithium battery pressure relief structure of claim 1, wherein: the diameter and the height of the cylindrical lithium battery shell (2) can be adjusted.
4. The cylindrical lithium battery pressure relief structure of claim 1, wherein: the thickness of the non-closed circular ring thin layer (1) is smaller than that of the cylindrical lithium battery shell (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121088773.1U CN214957237U (en) | 2021-05-20 | 2021-05-20 | Pressure relief structure of cylindrical lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121088773.1U CN214957237U (en) | 2021-05-20 | 2021-05-20 | Pressure relief structure of cylindrical lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214957237U true CN214957237U (en) | 2021-11-30 |
Family
ID=79061965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121088773.1U Active CN214957237U (en) | 2021-05-20 | 2021-05-20 | Pressure relief structure of cylindrical lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214957237U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023155623A1 (en) * | 2022-02-21 | 2023-08-24 | 宁德时代新能源科技股份有限公司 | Battery and electric device |
-
2021
- 2021-05-20 CN CN202121088773.1U patent/CN214957237U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023155623A1 (en) * | 2022-02-21 | 2023-08-24 | 宁德时代新能源科技股份有限公司 | Battery and electric device |
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