CN221080164U - Steel shell for improving safety performance of cylindrical lithium ion battery - Google Patents
Steel shell for improving safety performance of cylindrical lithium ion battery Download PDFInfo
- Publication number
- CN221080164U CN221080164U CN202322653177.9U CN202322653177U CN221080164U CN 221080164 U CN221080164 U CN 221080164U CN 202322653177 U CN202322653177 U CN 202322653177U CN 221080164 U CN221080164 U CN 221080164U
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- shell
- interlayer
- steel shell
- 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
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 239000011229 interlayer Substances 0.000 claims abstract description 16
- 238000004804 winding Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001556 precipitation Methods 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
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- Secondary Cells (AREA)
- Primary Cells (AREA)
Abstract
The utility model provides a steel shell for improving the safety performance of a cylindrical lithium ion battery, which comprises an outer shell, an interlayer connected with the outer shell, and an inner shell connected with the interlayer, wherein a section of open cavity is formed, and the interlayer is of a wavy structure and forms a triangular structure with the outer shell and the inner shell respectively. Compared with the existing steel shell with the planar side wall structure, the steel shell provides a buffer space, so that safety failure caused by deformation of the outer wall of the steel shell due to expansion of the lithium ion battery winding core in the use process is avoided, meanwhile, the direct acting force of the lithium ion battery on the lithium ion battery winding core in the falling and heavy object impact process is effectively reduced, and the safety performance of the lithium ion battery is improved.
Description
Technical Field
The utility model relates to the field of cylindrical lithium ion batteries, in particular to a steel shell for improving the safety performance of a cylindrical lithium ion battery.
Background
Along with the improvement of the single capacity requirement of the lithium ion battery, the silicon negative electrode is widely applied to the lithium ion battery. Because of the characteristic problem of the silicon anode material, the roll core of the silicon anode lithium ion battery expands in the circulation process, so that the steel shell is deformed, and safety failure can be caused in the thinned area of the steel shell.
Aiming at the technical problems, the current common means in the industry are to reduce the compaction thickness of the electrode to improve the rebound allowance of the electrode so as to achieve the purpose of slowing down the expansion of the winding core or increasing the strength of the steel shell to inhibit the deformation of the steel shell caused by the expansion of the winding core, but excessively reducing the compaction thickness of the negative electrode easily causes the material falling in the local area of the negative electrode sheet to bring about the safety failure problem caused by lithium precipitation, and increasing the strength of the steel shell to inhibit the outward expansion of the winding core possibly causes the expansion of the winding core towards the direction of the diaphragm so as to cause the diaphragm to puncture so as to cause the internal short circuit of the battery core to cause the safety failure problem.
Disclosure of Invention
The utility model aims to provide a cylindrical lithium ion battery steel shell for further improving the safety performance of a cylindrical lithium ion battery.
The technical scheme of the utility model is as follows: the utility model provides an improve steel casing of cylinder lithium ion battery security performance which characterized in that: the novel corrugated hollow shell comprises an outer shell, an interlayer connected with the outer shell, and an inner shell connected with the interlayer, wherein a section of open cavity is formed, and the interlayer is of a corrugated structure and is respectively connected with the outer shell and the inner shell to form a hollow structure.
The beneficial technical effects of the utility model are as follows: the steel shell, the interlayer and the inner shell of the steel shell provided by the utility model form a cavity structure, so that a buffer space can be provided, safety failure caused by deformation of the outer wall of the steel shell due to expansion of the lithium ion battery winding core in the use process is avoided, the direct acting force of the lithium ion battery on the lithium ion battery winding core in the falling and heavy object impact processes can be effectively reduced, and the safety performance of the lithium ion battery is improved.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The implementation of the present invention will be described in detail below with reference to specific embodiments.
As shown in fig. 1, 2 and 3, the steel shell for improving the safety performance of the cylindrical lithium ion battery comprises the following specific embodiments: the outer shell 1, the interlayer 2 connected with the outer shell 1 and the inner shell 3 connected with the interlayer form a cavity with one end open. Wherein the inner diameter of the outer shell 1 may be the same as the outer diameter of the interlayer 2, and the inner diameter of the interlayer 2 may be the same as the outer diameter of the inner shell 3; the space formed by the outer shell 1 and the interlayer 2 can be made into a triangle, a semicircle, a trapezoid, a rectangle and the like, and the space formed by the interlayer 2 and the inner shell 3 can be made into a triangle, a semicircle, a trapezoid, a rectangle and the like. Compared with the existing steel shell with the planar side wall structure, the sandwich structure provides a buffer space, avoids safety failure caused by deformation of the outer wall of the steel shell due to expansion of the lithium ion battery winding core in the use process, and can also effectively reduce direct acting force of the lithium ion battery winding core in the falling and heavy impact process, so that the safety performance of the lithium ion battery is improved.
Drawings
FIG. 1 is a top view of the present utility model;
FIG. 2 is a front view of the present utility model;
fig. 3 is an assembly view of the present utility model applied to a lithium ion battery;
In the figure, 1 is the shell, 2 is the intermediate layer, 3 is the inner shell, 4 is the cap, 5 is the retainer plate, and 6 is the core.
Claims (1)
1. The utility model provides an improve steel casing of cylinder lithium ion battery security performance which characterized in that: the corrugated sandwich type air conditioner comprises an outer shell, an interlayer connected with the outer shell, and an inner shell connected with the interlayer, wherein a section of open cavity is formed, and the interlayer is of a corrugated structure and forms a triangular structure with the outer shell and the inner shell respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322653177.9U CN221080164U (en) | 2023-09-28 | 2023-09-28 | Steel shell for improving safety performance of cylindrical lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322653177.9U CN221080164U (en) | 2023-09-28 | 2023-09-28 | Steel shell for improving safety performance of cylindrical lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221080164U true CN221080164U (en) | 2024-06-04 |
Family
ID=91259780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322653177.9U Active CN221080164U (en) | 2023-09-28 | 2023-09-28 | Steel shell for improving safety performance of cylindrical lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221080164U (en) |
-
2023
- 2023-09-28 CN CN202322653177.9U patent/CN221080164U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |