CN215911549U - Button cell - Google Patents
Button cell Download PDFInfo
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- CN215911549U CN215911549U CN202121696236.5U CN202121696236U CN215911549U CN 215911549 U CN215911549 U CN 215911549U CN 202121696236 U CN202121696236 U CN 202121696236U CN 215911549 U CN215911549 U CN 215911549U
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- conductive top
- top cover
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- cell
- cap
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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 utility model belongs to the technical field of lithium ion batteries, and particularly relates to a button cell which comprises a cell roll core, a cell shell and a conductive top cover assembly, wherein the cell roll core is arranged in the cell shell; the conductive top cover assembly comprises a first conductive top cover and a second conductive top cover which are insulated from each other, a positive electrode lug and a negative electrode lug are arranged at one end, facing the opening of the battery shell, of the battery winding core, the negative electrode lug is electrically connected with the inner wall of the first conductive top cover, and the positive electrode lug is electrically connected with the inner wall of the second conductive top cover. According to the button cell, the conductive top cover is directly connected with the positive electrode lug and the negative electrode lug while serving as the end face of the cell shell, so that the welding process of the positive electrode lug and the negative electrode lug is simplified, the production efficiency is improved, and the assembly difficulty is reduced.
Description
Technical Field
The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a button cell.
Background
A lithium ion battery is a secondary battery (rechargeable battery) that mainly operates by movement of lithium ions between a positive electrode and a negative electrode. The traditional lithium ion battery generally comprises an electric core and a battery shell, wherein the electric core mainly comprises a positive pole piece, a negative pole piece, a diaphragm, electrolyte, a positive pole lug and a negative pole lug, the diaphragm is arranged between the positive pole piece and the negative pole piece, the positive pole lug is connected to the positive pole piece, and the negative pole lug is connected to the negative pole piece.
In the production process of the lithium ion battery, a positive electrode and a negative electrode are required to be welded on the inner side of a battery shell, and the positive electrode and the negative electrode are respectively welded with a positive electrode lug and a negative electrode lug. This makes the welding process of anodal utmost point ear and negative pole utmost point ear complicated to lead to lithium ion battery's production efficiency low, the assembly degree of difficulty is high.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: the button cell is provided aiming at the problems that in the prior art, the welding process of a positive electrode lug and a negative electrode lug of a lithium ion battery is complex, so that the production efficiency of the lithium ion battery is low and the assembly difficulty is high.
In order to solve the technical problem, an embodiment of the utility model provides a button cell, which comprises a cell roll core, a cell shell and a conductive top cover assembly, wherein the cell roll core is arranged in the cell shell, one end of the cell shell is provided with an opening, and the conductive top cover assembly is hermetically connected with the opening end of the cell shell; the conductive top cover assembly comprises a first conductive top cover and a second conductive top cover which are insulated from each other, the battery roll core faces towards one end of the opening of the battery shell, a positive electrode lug and a negative electrode lug are arranged at one end of the opening of the battery shell, the negative electrode lug is electrically connected with the inner wall of the first conductive top cover, and the positive electrode lug is electrically connected with the inner wall of the second conductive top cover.
Optionally, a liquid injection hole is formed in the conductive top cover assembly.
Optionally, the battery case is cylindrical, and the conductive top cap assembly is circular; the first conductive top cover is a left semicircular conductive top cover, and the second conductive top cover is a right semicircular conductive top cover; the arc-shaped outer peripheral surface of the left semicircular conductive top cover is welded with the inner edge of the opening end of the battery shell, and the arc-shaped outer peripheral surface of the right semicircular conductive top cover is welded with the inner edge of the opening end of the battery shell.
Optionally, the left semicircular conductive top cover comprises a left semicircular conductive top cover main body and a left connecting boss connected to the right end face of the left semicircular conductive top cover main body, the right semicircular conductive top cover comprises a right semicircular conductive top cover main body and a right connecting boss connected to the left end face of the right semicircular conductive top cover main body, the right connecting boss covers the left connecting boss, and the upper surface of the right connecting boss is flush with the upper surface of the left semicircular conductive top cover main body.
Optionally, the conductive top cover assembly further comprises an insulating seal ring, the insulating seal ring is sleeved on the outer surface of the right semicircular conductive top cover, the right semicircular conductive top cover is connected with the left semicircular conductive top cover in a sealing mode through the insulating seal ring, and the right semicircular conductive top cover is connected with the opening end of the battery shell in a sealing mode through the insulating seal ring.
Optionally, the shape of anodal utmost point ear with negative pole utmost point ear is L shape, anodal utmost point ear with the vertical portion of negative pole utmost point ear is connected the battery rolls up the core, the horizontal part of negative pole utmost point ear with the inner wall welding of first electrically conductive top cap, the horizontal part of anodal utmost point ear with the inner wall welding of the electrically conductive top cap of second.
Optionally, the battery case is made of stainless steel, and the first conductive top cover and the second conductive top cover are made of conductive metal.
According to the button cell provided by the embodiment of the utility model, the negative pole tab is directly and electrically connected with the inner side of the first conductive top cover, and the positive pole tab is directly and electrically connected with the inner side of the second conductive top cover, so that the conductive top cover is directly connected with the positive pole tab and the negative pole tab while serving as the end surface of the cell shell; in the production process, the positive pole lug and the negative pole lug only need to be welded with the conductive top cover, the electrodes used for leading the positive pole lug and the negative pole lug to the battery shell do not need to be independently arranged, the welding process of the positive pole lug and the negative pole lug can be simplified, and therefore the production efficiency is improved, and the assembly difficulty is reduced.
Drawings
Fig. 1 is a schematic perspective view of a button cell according to an embodiment of the present invention;
fig. 2 is an exploded view of a button cell battery according to an embodiment of the present invention.
The reference numerals in the specification are as follows:
1. a battery case;
2. a battery roll core; 21. a negative electrode tab; 22. a positive electrode tab;
3. a conductive header assembly; 31. a first conductive top cap; 311. a left semicircular conductive top cap body; 312. a left connecting boss; 32. a second conductive top cap; 321. a right semi-circular conductive top cap body; 322. a right connecting boss; 33. a liquid injection hole; 34. and (5) insulating a sealing ring.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
It should be noted that the terms of orientation such as inner, outer, left, right, etc. are only relative to each other, and should not be considered as limiting.
As shown in fig. 1-2, a button cell provided in an embodiment of the present invention includes a cell roll core 2, a cell case 1, and a conductive cap assembly 3, where the cell roll core 2 is mounted in the cell case 1, an opening is formed at one end of the cell case 1, and the conductive cap assembly 3 is hermetically connected to the opening end of the cell case 1; electrically conductive top cap subassembly 3 is including the first electrically conductive top cap 31 and the electrically conductive top cap 32 of second of mutual insulation, battery core 2 is at the orientation 1 open-ended one end of battery case is equipped with anodal utmost point ear 22 and negative pole utmost point ear 21, negative pole utmost point ear 21 with the inner wall electric connection of first electrically conductive top cap 31, anodal utmost point ear 22 with the inner wall electric connection of the electrically conductive top cap 32 of second.
In an embodiment, the conductive top cap assembly 3 is provided with a liquid injection hole 33, so that the liquid injection hole does not need to be reserved in the battery roll core 2, and the energy density of the button cell can be improved. The liquid injection hole 33 is a circular through hole, and the liquid injection hole 33 is provided in one of the first conductive top lid 31 and the second conductive top lid 32.
In one embodiment, the battery case 1 is cylindrical, and the conductive cap assembly 3 is circular; the first conductive top cover 31 is a left semicircular conductive top cover, and the second conductive top cover 32 is a right semicircular conductive top cover; the arc-shaped outer peripheral surface of the left semicircular conductive top cover is welded with the inner edge of the opening end of the battery shell 1, and the arc-shaped outer peripheral surface of the right semicircular conductive top cover is welded with the inner edge of the opening end of the battery shell 1.
In an embodiment, the left semicircular conductive cap includes a left semicircular conductive cap body 311 and a left connection boss 312 connected to a right side end surface of the left semicircular conductive cap body 311, the right semicircular conductive cap includes a right semicircular conductive cap body 321 and a right connection boss 322 connected to a left side end surface of the right semicircular conductive cap body 321, the right connection boss 322 covers the left connection boss 312, and an upper surface of the right connection boss 322 is flush with an upper surface of the left semicircular conductive cap body 311. The right connecting boss 322 is covered on the left connecting boss 312, so that the right semicircular conductive top cover and the left semicircular conductive top cover are connected more tightly.
In an embodiment, the conductive top cap assembly 3 further includes an insulating sealing ring 34, the insulating sealing ring 34 is sleeved on the outer side surface of the right semicircular conductive top cap, the right semicircular conductive top cap is connected with the left semicircular conductive top cap in a sealing manner through the insulating sealing ring 34, and the right semicircular conductive top cap is connected with the open end of the battery case 1 in a sealing manner through the insulating sealing ring 34.
In an embodiment, the shape of the positive electrode tab 22 and the negative electrode tab 21 is L-shaped, the positive electrode tab 22 and the vertical part of the negative electrode tab 21 are connected to the battery roll core 2, the horizontal part of the negative electrode tab 21 is laser welded to the inner wall of the first conductive top cover 31, and the horizontal part of the positive electrode tab 22 is laser welded to the inner wall of the second conductive top cover 32.
In an embodiment, the battery case 1 is made of stainless steel, and the first conductive top cap 31 and the second conductive top cap 32 are made of conductive metal.
According to the button cell provided by the embodiment of the utility model, the negative pole tab is directly and electrically connected with the inner side of the first conductive top cover, and the positive pole tab is directly and electrically connected with the inner side of the second conductive top cover, so that the conductive top cover is directly connected with the positive pole tab and the negative pole tab while serving as the end surface of the cell shell; in the production process, the positive pole lug and the negative pole lug only need to be welded with the conductive top cover, the electrodes used for leading the positive pole lug and the negative pole lug to the battery shell do not need to be independently arranged, the welding process of the positive pole lug and the negative pole lug can be simplified, and therefore the production efficiency is improved, and the assembly difficulty is reduced.
In other embodiments, the conductive header assembly does not include a pour hole. In the production process of the button cell, firstly welding the first conductive top cover on the inner edge of the opening end of the cell shell; then injecting liquid through a part of the opening of the battery shell which is not shielded by the first conductive top cover; after the liquid injection is finished, welding the second conductive top cover on the inner edge of the opening end of the battery shell; and finally, pressing the insulating sealing ring into the gap between the second conductive top cover and the first conductive top cover to enable the insulating sealing ring to be sleeved on the outer side surface of the second conductive top cover to realize sealing.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A button cell is characterized by comprising a cell winding core, a cell shell and a conductive top cover assembly, wherein the cell winding core is arranged in the cell shell, one end of the cell shell is provided with an opening, and the conductive top cover assembly is hermetically connected with the opening end of the cell shell; the conductive top cover assembly comprises a first conductive top cover and a second conductive top cover which are insulated from each other, the battery roll core faces towards one end of the opening of the battery shell, a positive electrode lug and a negative electrode lug are arranged at one end of the opening of the battery shell, the negative electrode lug is electrically connected with the inner wall of the first conductive top cover, and the positive electrode lug is electrically connected with the inner wall of the second conductive top cover.
2. The button cell according to claim 1, wherein the conductive top cap assembly is provided with a liquid injection hole.
3. The button cell battery according to claim 1, wherein the battery case is cylindrical and the conductive top cap assembly is circular; the first conductive top cover is a left semicircular conductive top cover, and the second conductive top cover is a right semicircular conductive top cover; the arc-shaped outer peripheral surface of the left semicircular conductive top cover is welded with the inner edge of the opening end of the battery shell, and the arc-shaped outer peripheral surface of the right semicircular conductive top cover is welded with the inner edge of the opening end of the battery shell.
4. The button cell according to claim 3, wherein the left semicircular conductive cap comprises a left semicircular conductive cap body and a left connecting boss connected to a right end surface of the left semicircular conductive cap body, the right semicircular conductive cap comprises a right semicircular conductive cap body and a right connecting boss connected to a left end surface of the right semicircular conductive cap body, the right connecting boss covers the left connecting boss, and an upper surface of the right connecting boss is flush with an upper surface of the left semicircular conductive cap body.
5. The button cell according to claim 3, wherein the conductive top cap assembly further comprises an insulating sealing ring, the insulating sealing ring is sleeved on the outer side surface of the right semicircular conductive top cap, the right semicircular conductive top cap is connected with the left semicircular conductive top cap in a sealing manner through the insulating sealing ring, and the right semicircular conductive top cap is connected with the open end of the cell shell in a sealing manner through the insulating sealing ring.
6. The button cell according to claim 1, wherein the positive tab and the negative tab are both L-shaped, the positive tab and the vertical portion of the negative tab are connected to the cell roll core, the horizontal portion of the negative tab is welded to the inner wall of the first conductive top cover, and the horizontal portion of the positive tab is welded to the inner wall of the second conductive top cover.
7. The button cell according to claim 1, wherein the battery case is made of stainless steel, and the first conductive top cap and the second conductive top cap are made of conductive metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121696236.5U CN215911549U (en) | 2021-07-23 | 2021-07-23 | Button cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121696236.5U CN215911549U (en) | 2021-07-23 | 2021-07-23 | Button cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215911549U true CN215911549U (en) | 2022-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121696236.5U Active CN215911549U (en) | 2021-07-23 | 2021-07-23 | Button cell |
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|---|---|
| CN (1) | CN215911549U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023173716A1 (en) * | 2022-07-05 | 2023-09-21 | 湖北亿纬动力有限公司 | Battery |
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2021
- 2021-07-23 CN CN202121696236.5U patent/CN215911549U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023173716A1 (en) * | 2022-07-05 | 2023-09-21 | 湖北亿纬动力有限公司 | Battery |
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