CN220710476U - Square steel shell lithium battery shell structure - Google Patents
Square steel shell lithium battery shell structure Download PDFInfo
- Publication number
- CN220710476U CN220710476U CN202322278839.9U CN202322278839U CN220710476U CN 220710476 U CN220710476 U CN 220710476U CN 202322278839 U CN202322278839 U CN 202322278839U CN 220710476 U CN220710476 U CN 220710476U
- Authority
- CN
- China
- Prior art keywords
- shell
- lithium battery
- square steel
- liquid injection
- structure according
- 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.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims description 19
- 238000003466 welding Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 230000000630 rising effect Effects 0.000 abstract description 3
- 208000013883 Blast injury Diseases 0.000 abstract description 2
- 238000004880 explosion Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model relates to a square steel shell lithium battery shell structure, which comprises a front shell and a rear cover plate welded with the front shell; the front shell is provided with a liquid injection hole, and an explosion-proof sheet is welded on the liquid injection hole; the utility model has reasonable structure and novel design, the liquid injection hole forms a pressure relief point, and ensures that the high-pressure gas pressure preferentially rushes out of the position to release pressure when the internal short circuit of the battery core is abnormal, thereby preventing the explosion injury and equipment problems caused by the continuous rising of the internal pressure of the steel shell.
Description
Technical Field
The utility model relates to the technical field of lithium battery structures, in particular to a square steel shell lithium battery shell structure.
Background
The steel shell of the traditional square lithium battery is basically consistent in overall strength, when an internal cell is short-circuited or external force is impacted, the internal pressure is rapidly increased, but the pressure cannot be effectively released due to the consistent overall strength of the steel shell, so that the pressure reaches the limit explosion of the steel shell.
Disclosure of Invention
In view of the above, it is necessary to provide a square steel-shell lithium battery case structure including a front case and a rear cover plate welded with the front case;
the front shell is provided with a liquid injection hole, and an explosion-proof sheet is welded on the liquid injection hole;
an insulating sheet is welded in the front shell.
Preferably, the front shell comprises a bottom plate and sealing plates arranged around the bottom plate, and the bottom plate and the sealing plates form a cavity with an upward opening.
Preferably, the insulating sheet is welded into the cavity.
Preferably, the liquid injection hole is formed in any sealing plate.
Preferably, the insulating sheet is close to the liquid injection hole side.
Preferably, the insulating sheet is provided with a through groove for pressure relief.
Preferably, the upper end of the sealing plate is provided with an extension plate which extends outwards and is used for welding.
Preferably, the joints of the adjacent extension plates are in smooth transition.
Preferably, the bottom plate, the sealing plate and the extension plate are of an integrated structure.
Preferably, the front shell is provided with positive and negative buttons, and the positive and negative buttons are arranged on a sealing plate corresponding to the liquid injection hole.
The beneficial effects are that: the utility model has reasonable structure and novel design, the liquid injection hole position forms a pressure relief point, and ensures that the high-pressure gas pressure is preferentially flushed from the liquid injection hole position to release pressure when the internal short circuit of the battery core is abnormal, thereby preventing the problems of injury to people and equipment caused by explosion due to the continuous rising of the internal pressure of the steel shell.
Drawings
FIG. 1 is a schematic perspective view of the structure of the present utility model;
fig. 2 is a schematic perspective view of the front housing structure in the present utility model.
In the figure: 1-front shell, 2-back cover plate, 3-liquid injection hole, 4-explosion-proof piece, 5-insulating piece.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Examples:
as shown in fig. 1-2, a square steel shell lithium battery shell structure comprises a front shell 1 and a rear cover plate 2 welded with the front shell 1; the front shell 1 is provided with positive and negative buttons, the positive and negative buttons are arranged on a sealing plate corresponding to the liquid injection hole 3, the front shell 1 comprises a bottom plate and sealing plates arranged around the bottom plate, an extension plate which extends outwards is arranged at the upper end of the sealing plate and is used for welding, the rear cover plate 2 is convenient to weld with the front shell 1, the joint of the adjacent extension plates is smooth, the bottom plate, the sealing plates and the extension plates are of an integrated structure, an insulating sheet 5 is close to the side of the liquid injection hole 3, the bottom plate and the sealing plates form a cavity with an upward opening, the liquid injection hole 3 is formed in the front shell 1, the liquid injection hole 3 is formed in any sealing plate, and an explosion-proof sheet 4 is welded on the liquid injection hole 3; an insulating sheet 5 is welded in the front shell 1, a through groove for pressure relief is formed in the insulating sheet 5, and the insulating sheet 5 is welded in the cavity.
The insulating sheet 5 is welded in the front shell 1, the rear cover plate 2 is welded on the front shell 1, liquid is injected into the front shell 1 through the liquid injection hole 3, after liquid injection is completed, the explosion-proof sheet 4 is used for laser welding sealing under the drying condition, a pressure relief point is formed at the position of the liquid injection hole 3, when the internal short circuit of the battery core is ensured to be abnormal, the high-pressure air pressure is enabled to preferentially blow out the pressure explosion-proof sheet 4 from the position, the explosion-proof sheet 4 is thinner and has low hardness, so that pressure relief from the opening is ensured when the pressure is overlarge, and the explosion injury and equipment problem caused by the constant rising of the internal pressure of the steel shell are prevented.
The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The square steel shell lithium battery shell structure is characterized by comprising a front shell (1) and a rear cover plate (2) welded with the front shell (1);
the front shell (1) is provided with a liquid injection hole (3), and an explosion-proof sheet (4) is welded on the liquid injection hole (3);
an insulating sheet (5) is welded in the front shell (1).
2. The square steel shell lithium battery shell structure according to claim 1, wherein: the front shell (1) comprises a bottom plate and sealing plates arranged on the periphery of the bottom plate, and the bottom plate and the sealing plates form a cavity with an upward opening.
3. The square steel shell lithium battery shell structure according to claim 2, wherein: the insulating sheet (5) is welded in the cavity.
4. A square steel shell lithium battery housing structure according to claim 3, wherein: the liquid injection holes (3) are formed in any sealing plate.
5. The square steel shell lithium battery shell structure according to claim 4, wherein: the insulating sheet (5) is close to the side of the liquid injection hole (3).
6. The square steel shell lithium battery shell structure according to claim 1, wherein: and the insulating sheet (5) is provided with a through groove for pressure relief.
7. The square steel shell lithium battery shell structure according to claim 2, wherein: and the upper end of the sealing plate is provided with an extension plate which extends outwards and is used for welding.
8. The square steel shell lithium battery shell structure according to claim 7, wherein: and the joint of the adjacent extension plates is in smooth transition.
9. The square steel shell lithium battery shell structure according to claim 8, wherein: the bottom plate, the sealing plate and the extension plate are of an integrated structure.
10. The square steel shell lithium battery shell structure according to claim 4, wherein: the front shell (1) is provided with positive and negative buttons, and the positive and negative buttons are arranged on sealing plates corresponding to the liquid injection holes (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322278839.9U CN220710476U (en) | 2023-08-23 | 2023-08-23 | Square steel shell lithium battery shell structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322278839.9U CN220710476U (en) | 2023-08-23 | 2023-08-23 | Square steel shell lithium battery shell structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220710476U true CN220710476U (en) | 2024-04-02 |
Family
ID=90435948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322278839.9U Active CN220710476U (en) | 2023-08-23 | 2023-08-23 | Square steel shell lithium battery shell structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220710476U (en) |
-
2023
- 2023-08-23 CN CN202322278839.9U patent/CN220710476U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |