CN218548526U - High-safety lithium ion battery structure - Google Patents
High-safety lithium ion battery structure Download PDFInfo
- Publication number
- CN218548526U CN218548526U CN202222570555.2U CN202222570555U CN218548526U CN 218548526 U CN218548526 U CN 218548526U CN 202222570555 U CN202222570555 U CN 202222570555U CN 218548526 U CN218548526 U CN 218548526U
- Authority
- CN
- China
- Prior art keywords
- hole
- explosion
- liquid injection
- lithium ion
- ion battery
- 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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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 238000002347 injection Methods 0.000 claims abstract description 25
- 239000007924 injection Substances 0.000 claims abstract description 25
- 238000005096 rolling process Methods 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000004880 explosion Methods 0.000 abstract description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052744 lithium Inorganic materials 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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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- Gas Exhaust Devices For Batteries (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides a high security lithium ion battery structure, the lithium cell is including rolling up core, apron, anodal utmost point ear and negative pole utmost point ear, its characterized in that: the liquid injection hole on the cover plate is the same as the position of the explosion-proof valve hole, and a hole is formed in the positive pole lug. The cover plate liquid injection hole and the explosion-proof valve hole are positioned in the same position; the battery cell baking and liquid injection are facilitated, the production efficiency is improved, meanwhile, the damage of the explosion-proof valve caused by liquid injection is avoided, and the risk of failure of the explosion-proof valve is reduced; the positive pole lug contains the hole, when the external short circuit occurs to the electric core, the internal circuit break of the electric core is facilitated, the risk of battery fire and explosion is avoided, and the safety performance of the electric core is improved.
Description
Technical Field
The utility model belongs to the technical field of lithium ion battery, concretely relates to high security lithium ion battery structure.
Background
The lithium ion battery as a green power supply is widely applied to the fields of electric energy storage, household energy storage, transportation and the like due to the advantages of small volume, no pollution, low cost and the like. In recent years, various technologies of lithium ion batteries are rapidly developed, and technical routes are continuously mature, wherein square aluminum shell battery cells are widely researched, developed and utilized on a large scale due to high capacity and excellent performance. At present, a small liquid injection hole is needed in the structural design of a square aluminum shell lithium ion battery, so that the moisture of a battery core is difficult to bake, the liquid injection efficiency is reduced, and the defects of long production period and the like are caused; meanwhile, the explosion-proof valve is damaged to a certain extent by repeated alternation of negative pressure and positive pressure during liquid injection, and even the explosion-proof valve fails.
In view of the above problems and risks in the production and manufacturing process of the battery cell, it is necessary to provide a simple and effective cover plate and a manufacturing method of a lithium ion battery to solve the current problems.
In addition, the larger the lithium ion battery is, the capacity exceeds 300Ah, the smaller the alternating internal resistance of the lithium ion battery is, continuous heavy current discharge can occur in a national standard short circuit test, so that the lithium ion battery is caused to be on fire and fail, the current mainstream mode is to dig holes on an internal switching sheet to reduce the overcurrent cross-sectional area, but the battery structure needing the internal switching sheet occupies a large space, and the welding position of a winding core lug and a connecting sheet can be influenced by the battery structure with a certain insufficient space.
Disclosure of Invention
The utility model aims to overcome above-mentioned not enough, provide a high security lithium ion battery structure, this structure realizes electric core moisture content toasts the time and annotates the reduction of liquid time, improves production efficiency to and to the damage of explosion-proof valve when avoiding annotating the liquid, simple structure and security are high.
The utility model provides a high security lithium ion battery structure, lithium cell is including rolling up core, apron, anodal utmost point ear and negative pole utmost point ear, its characterized in that: the welding position of the liquid injection hole on the cover plate is the same as that of the explosion-proof valve hole (namely, the liquid injection hole and the explosion-proof valve hole are the same hole), and a hole is formed in the positive pole lug.
Furthermore, the welding position of the liquid injection hole and the explosion-proof valve hole is in the middle of the cover plate or on two sides of the cover plate; preferably in the middle.
Further, the liquid injection hole is circular, oval, square or irregular.
Furthermore, the shape of the hole on the positive electrode tab is circular, square, triangular or oval and the like.
Furthermore, the number of the holes on the positive pole lug is single or multiple.
Compared with the prior art, the utility model has the advantages of:
(1) The design of the same position of the liquid injection hole and the explosion-proof valve hole increases the area of the battery cell during baking and liquid injection, is beneficial to baking and liquid injection of the battery cell, realizes the reduction of the baking time and the liquid injection time of the moisture of the battery cell, improves the production efficiency and reduces the manufacturing cost; meanwhile, the damage of the explosion-proof valve caused by liquid injection is avoided, the failure risk of the explosion-proof valve is reduced, and the production yield is improved;
(2) The utility model provides a utmost point ear design of punching, anodal utmost point ear contain the hole, and when the outside short circuit took place for electric core, the inside formation of favourable electric core was opened circuit, has avoided the risk of battery explosion on fire, has improved the security performance of electric core.
Drawings
Fig. 1 is the structural schematic diagram of the high-safety lithium ion battery of the present invention, wherein:
1-roll core, 2-cover plate, 3-negative pole tab, 4-positive pole tab, and 5-hole.
Fig. 2 is a schematic view of the cover plate appearance of the present invention, wherein:
6-positive pole column, 7-liquid injection hole (explosion-proof valve hole), and 8-negative pole column.
Fig. 3 is the appearance schematic diagram of the high-safety lithium ion battery of the present invention, wherein:
6-anode pole, 9-explosion-proof valve and 8-cathode pole.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments. The technical method in the embodiment of the present invention is further described, and the illustrated embodiment is only one showing form of the technology in the present invention. All other embodiments obtained by a person skilled in the art without any inventive step are within the scope of the present invention.
As shown in fig. 1, the high-safety lithium ion battery structure of the present invention includes a winding core 1, and a current collecting tab is provided at an end of the winding core; a cover plate 2; the negative electrode tab 3, the positive electrode tab 4 and the positive electrode tab contain holes 5. As shown in fig. 2 and 3, the liquid inlet 7 of the lid plate 2 is positioned at the same position as the explosion-proof valve hole (i.e., is the same hole).
The welding position of the liquid injection hole and the explosion-proof valve hole is in the middle of the cover plate, and can be on any side; preferably in the middle.
The liquid injection hole is round, oval, square or other irregular shapes.
The shape of the hole on the positive electrode lug is circular, square, triangular or elliptical and the like.
The number of the holes on the positive pole lug is single or multiple.
The positive pole lug contains a hole, which is different from the conventional punching mode on the connecting piece, thereby being beneficial to the disconnection of the battery cell when the battery cell is externally short-circuited, avoiding the risk of fire and explosion of the battery and improving the safety performance of the battery cell.
Different from the different design of the conventional liquid injection hole and the explosion-proof valve, the utility model welds the winding core on the cover plate, welds the cover plate without the explosion-proof valve block on the aluminum shell, and dries the water after the assembly, which is beneficial to improving the drying efficiency; and during liquid injection, the liquid injection efficiency can be improved, defective products caused by damage of the explosion-proof valve are fewer, and after the processes of formation, aging and the like, the explosion-proof valve plate is welded with the welding position of the explosion-proof valve hole in the figure 2, and finally the whole packaging process of the battery is completed as shown in an explosion-proof valve 9 in the figure 3.
The above description is only an example of the present invention, and does not limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a high security lithium ion battery structure, lithium ion battery is including rolling up core, apron, anodal utmost point ear and negative pole utmost point ear, its characterized in that: the liquid injection hole on the cover plate is the same as the position of the explosion-proof valve hole, and the positive pole lug is provided with a hole.
2. The high-safety lithium ion battery structure according to claim 1, wherein: the liquid injection hole is arranged in the middle of the cover plate or on two sides of the cover plate.
3. The high-safety lithium ion battery structure of claim 1, wherein: the liquid injection hole is round, oval or square.
4. The high-safety lithium ion battery structure of claim 1, wherein: the shape of the hole on the positive electrode lug is circular, square, triangular or elliptical.
5. The high-safety lithium ion battery structure according to claim 1, wherein: the number of the holes on the positive pole lug is single or multiple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222570555.2U CN218548526U (en) | 2022-09-28 | 2022-09-28 | High-safety lithium ion battery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222570555.2U CN218548526U (en) | 2022-09-28 | 2022-09-28 | High-safety lithium ion battery structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218548526U true CN218548526U (en) | 2023-02-28 |
Family
ID=85274695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222570555.2U Active CN218548526U (en) | 2022-09-28 | 2022-09-28 | High-safety lithium ion battery structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218548526U (en) |
-
2022
- 2022-09-28 CN CN202222570555.2U patent/CN218548526U/en active Active
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