CN216597683U - Button cell - Google Patents
Button cell Download PDFInfo
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- CN216597683U CN216597683U CN202122861798.7U CN202122861798U CN216597683U CN 216597683 U CN216597683 U CN 216597683U CN 202122861798 U CN202122861798 U CN 202122861798U CN 216597683 U CN216597683 U CN 216597683U
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- cover plate
- shell
- crimping
- button cell
- flanging
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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
In order to overcome the problems of low sealing reliability and complex process of the existing button cell, the utility model provides a button cell, which comprises a shell, a cover plate and foaming glue; the shell comprises a bottom wall and a side wall arranged on the periphery of the bottom wall, and the end part, far away from the bottom wall, of the side wall is provided with a flanging structure wound outwards; the cover plate comprises a cover plate main body and an inward-wound curling structure extending from the edge of the cover plate main body; the edge curling structure wraps the edge turning structure, and the foaming glue is arranged between the edge curling structure and the edge turning structure so as to clamp and fix the cover plate on the shell; an accommodating cavity is formed between the shell and the cover plate. The flanging structure and the crimping structure are mutually hooked to fix the cover plate on the shell in a clamping manner, so that the stability is high, the aim of fixedly connecting the shell and the cover plate can be achieved by filling foaming glue, the foaming glue has the advantages of light weight, water resistance, flame retardance and the like, laser welding is not needed, the process is simple, and the sealing reliability is high.
Description
Technical Field
The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a button cell.
Background
The button cell is also called a button cell, and refers to a cell with the external dimension like a small button, generally speaking, a steel-shell button cell has a larger diameter and a thinner thickness, and the button cell comprises a steel-shell button cell and a soft-package button cell, wherein the steel-shell button cell is a cell sealed by an all-metal shell, and is characterized in that the cell has a small volume, so that the button cell is widely applied to various small electronic products such as computers, hearing aids, electronic watches, radios and the like.
The existing steel shell button cell generally adopts a cylindrical shell with an opening at one end, and is provided with an upper cover, the space between the steel shell and the cover plate is sealed in a laser welding mode, but the opening end is difficult to be subjected to laser welding, the process is complex, and the sealing reliability is low. In the prior art, the structure of the joint of the shell and the cover is also improved, and the insulating sealing ring is used for sealing the battery shell, but the insulating sealing ring is aged and shrunk along with the increase of the service life of the battery, so that the battery sealing is disabled, and therefore, the steel shell button battery needs to be improved to solve the problems of low sealing reliability and complex process between the shell and the cover plate.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems of low sealing reliability and complex process of the existing button cell, the utility model provides a button cell.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the utility model provides a button cell, which comprises a shell, a cover plate and foaming adhesive;
the shell comprises a bottom wall and a side wall arranged on the periphery of the bottom wall, and an outward-wound flanging structure is arranged at the end part, far away from the bottom wall, of the side wall;
the cover plate comprises a cover plate main body and an inward-winding crimping structure extending from the edge of the cover plate main body;
the edge curling structure wraps the edge curling structure, and the foaming adhesive is arranged between the edge curling structure and the edge curling structure so as to clamp and fix the cover plate on the shell;
an accommodating cavity is formed between the shell and the cover plate.
Optionally, the flange structure has a first flange portion, and the first flange portion is inclined from the end of the side wall toward a direction close to the central axis of the accommodating cavity.
Optionally, an included angle α between the first flanging part and the side wall is: alpha is more than 90 degrees and less than 180 degrees.
Optionally, the flange structure further includes a second flange portion, a third flange portion and a fourth flange portion, and the first flange portion, the second flange portion, the third flange portion and the fourth flange portion are sequentially connected;
the second flange portion extends from the first flange portion in a direction away from the plane of the bottom wall;
the third flanging part extends from the second flanging part towards the direction departing from the central axis of the accommodating cavity;
the fourth burring part extends from the third burring part toward the direction of the plane of the bottom wall.
Optionally, the crimping structure has a first crimping portion, and the first crimping portion is inclined from the edge of the cover plate main body towards a direction away from the central axis of the accommodating cavity.
Optionally, an included angle β between the first bead portion and the cover plate main body is: beta is more than 90 degrees and less than 180 degrees.
Optionally, the hemming structure further includes a second hemming portion, a third hemming portion, a fourth hemming portion, a fifth hemming portion and a sixth hemming portion, and the first hemming portion, the second hemming portion, the third hemming portion, the fourth hemming portion, the fifth hemming portion and the sixth hemming portion are connected in sequence;
the second hem portion extending from the first hem portion in a direction away from the plane of the bottom wall;
the third crimping part extends from the second crimping part towards the direction departing from the central axis of the accommodating cavity;
the fourth bead portion extends from the third bead portion toward the plane of the bottom wall;
the fifth curled portion extends from the fourth curled portion toward a direction of a central axis of the accommodating chamber;
the sixth bead portion extends from the fifth bead portion in a direction away from the plane of the bottom wall.
Optionally, the fourth flanging part is arranged between the fourth flanging part and the sixth flanging part, and the shell and the cover plate are fixed in a clamping manner.
Optionally, the button cell further comprises a sealing element, the cover plate is provided with a liquid injection hole, and the sealing element is arranged in the liquid injection hole in a penetrating manner and is fixedly connected with the cover plate.
Optionally, the button cell further includes a battery cell, the battery cell is disposed in the accommodating cavity, the battery cell includes a positive electrode tab and a negative electrode tab, the casing is electrically insulated from the cover plate, and the negative electrode tab is electrically connected to the cover plate; the positive pole lug is electrically connected with the shell.
The utility model has the beneficial effects that: according to the button cell provided by the utility model, the flanging structure is additionally arranged at the opening end of the shell, the edge of the cover plate is additionally provided with the curling structure, so that the cover plate and the shell can be connected through mutual hooking between the flanging structure and the curling structure, the connection stability is high, further, a gap between the flanging structure and the curling structure is filled through foaming glue, the cover plate and the shell are fixedly connected through the foaming glue with high adhesion, the sealing performance is strong, compared with the prior art, the button cell does not need to be subjected to laser welding, the process is simplified, meanwhile, the foaming glue has the advantages of low density, water resistance, flame retardance, insulation and the like, the leakage of electrolyte is effectively prevented, the electric insulation effect between the cover plate and the shell is enhanced, and the problem of low sealing reliability between the shell and the cover plate is solved.
Drawings
Fig. 1 is a cross-sectional view of a button cell provided by an embodiment of the utility model;
FIG. 2 is a schematic structural diagram of a cover plate according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a cover plate according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a housing according to an embodiment of the present invention.
The reference numbers in the drawings of the specification are as follows:
1. a housing; 11. a bottom wall; 12. a side wall; 13. the structure is turned over; 131. a first burring; 132. a second burring; 133. a third flanging part; 134. a fourth burring; 2. a cover plate; 21. a cover plate main body; 22. a crimping structure; 221. a first crimping portion; 222. a second bead portion; 223. a third bead portion; 224. a fourth bead portion; 225. a fifth hem portion; 226. a sixth bead portion; 23. a liquid injection hole; 3. foaming glue; 4. a seal member; 5. an electric core; 51. a positive electrode tab; 52. and a negative pole tab.
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 all the directional indications (such as upper, two sides, surface … …) in the embodiment of the present invention are only used to explain the relative position relationship, motion situation, etc. between the structures in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indication is changed accordingly.
Referring to fig. 1-4, an embodiment of the utility model provides a button cell, including a case 1, a cover plate 2 and a foam rubber 3;
the shell 1 comprises a bottom wall 11 and a side wall 12 arranged on the periphery of the bottom wall 11, wherein an outwardly-wound flanging structure 13 is arranged at the end part, far away from the bottom wall 11, of the side wall 12;
the cover plate 2 comprises a cover plate main body 21 and an inward-coiling crimping structure 22 extending from the edge of the cover plate main body 21;
the edge curling structure 22 wraps the edge curling structure 13, and the foaming adhesive 3 is arranged between the edge curling structure 22 and the edge curling structure 13 so as to clamp and fix the cover plate 2 on the shell 1;
an accommodating cavity is formed between the shell 1 and the cover plate 2.
According to the button cell provided by the utility model, the flanging structure 13 is additionally arranged at the opening end of the shell 1, the edge of the cover plate 2 is additionally provided with the curling structure 22, so that the cover plate 2 and the shell 1 can be connected by mutually hooking the flanging structure 13 and the curling structure 22, the connection stability is high, further, a gap between the flanging structure 13 and the curling structure 22 is filled by the foaming adhesive 3, the cover plate 2 and the shell 1 are fixedly connected by the foaming adhesive 3 with high adhesion, the sealing performance is strong, compared with the prior art, the button cell does not need laser welding, the process is simplified, meanwhile, the foaming adhesive has the advantages of being small in density, waterproof, flame retardant, insulating and the like, the leakage of electrolyte is effectively prevented, the electric insulation effect between the cover plate 2 and the shell 1 is enhanced, and the problem of low sealing reliability between the shell 1 and the cover plate 2 is solved.
Referring to fig. 4, in some embodiments, the flange structure 13 has a first flange portion 131, and the first flange portion 131 is inclined from the end of the side wall 12 toward a direction close to the central axis of the accommodating cavity.
In some embodiments, the angle α between the first flange portion 131 and the sidewall 12 is: alpha is more than 90 degrees and less than 180 degrees.
Through the arrangement of the first flanging part 131 extending towards the central axis of the accommodating cavity in the lateral direction, the whole flanging structure 13 is approximately positioned on the inner side of the side wall 12, so that the flanging structure 13 is prevented from obviously protruding out of the side wall 12, the size of the button cell is favorably reduced, and the energy density of the cell is improved.
In some embodiments, the flange structure 13 further includes a second flange portion 132, a third flange portion 133 and a fourth flange portion 134, and the first flange portion 131, the second flange portion 132, the third flange portion 133 and the fourth flange portion 134 are connected in sequence;
the second flange portion 132 extends from the first flange portion 131 in a direction away from the plane of the bottom wall 11;
the third flanging part 133 extends from the second flanging part 132 in a direction away from the central axis of the accommodating cavity;
the fourth burring 134 extends from the third burring 133 in a direction toward the plane of the bottom wall 11.
In a preferred embodiment, the angle between the second cuff portion 132 and the third cuff portion 133 is 90 °; an included angle between the third flanging part 133 and the fourth flanging part 134 is 90 °, and the length of the fourth flanging part 134 is smaller than that of the second flanging part 132, which is beneficial to improving the connection stability between the housing 1 and the cover plate 2.
Referring to fig. 2, in some embodiments, the crimping structure 22 has a first crimping portion 221, and the first crimping portion 221 is inclined from an edge of the cover plate main body 21 toward a direction away from a central axis of the receiving cavity.
In some embodiments, the angle β between the first crimping portion 221 and the cover main body 21 is: beta is more than 90 degrees and less than 180 degrees.
By arranging the first crimping part 221 extending in the lateral direction away from the central axis of the accommodating cavity, the length of the second crimping part 222 is increased, the stability of connection between the flanging structure 13 and the crimping structure 22 is improved, and the sealing reliability of the button cell is further improved.
In some embodiments, the hemming structure 22 further includes a second hemming portion 222, a third hemming portion 223, a fourth hemming portion 224, a fifth hemming portion 225, and a sixth hemming portion 226, and the first hemming portion 221, the second hemming portion 222, the third hemming portion 223, the fourth hemming portion 224, the fifth hemming portion 225, and the sixth hemming portion 226 are connected in sequence;
the second hem portion 222 extends from the first hem portion 221 in a direction away from the plane of the bottom wall 11;
the third curled portion 223 extends from the second curled portion 222 in a direction away from the central axis of the accommodating chamber;
the fourth bead portion 224 extends from the third bead portion 223 toward the plane of the bottom wall 11;
the fifth curled portion 225 extends from the fourth curled portion 224 in a direction toward the central axis of the accommodation chamber;
the sixth bead portion 226 extends from the fifth bead portion 225 in a direction away from the plane of the bottom wall 11.
In a preferred embodiment, an angle between the second curled portion 222 and the third curled portion 223 is 90 °, an angle between the third curled portion 223 and the fourth curled portion 224 is 90 °, an angle between the fourth curled portion 224 and the fifth curled portion 225 is 90 °, and an angle between the fifth curled portion 225 and the sixth curled portion 226 is 90 °, which is beneficial to improving the stability of the connection between the case 1 and the cover 2.
In some embodiments, the fourth flanging part 134 is disposed between the fourth flanging part 224 and the sixth flanging part 226, and the housing 1 and the cover plate 2 are locked and fixed.
In a preferred embodiment, the length of the second hem portion 222 is greater than the length of the second hem portion 132, the length of the third crimping portion 223 is greater than that of the third flanging portion 133, and the length of the fourth crimping portion 224 is greater than that of the fourth flanging portion 134, so that the crimping structure 22 can wrap the flanging structure 13, and further, the fourth burring part 134 is disposed between the fourth burring part 224 and the sixth burring part 226, the sixth flanging part 226 is partially overlapped with the fourth flanging part 134 in the length direction, so that the mutual hooking between the flanging structure 13 and the flanging structure 22 is realized, the cover plate 2 is prevented from being separated from the housing 1, therefore, the purpose of fixing the cover plate 2 on the shell 1 in a clamping way is achieved, compared with the prior art, laser welding is not needed, the process is simplified, and meanwhile, the sealing reliability is improved.
In order to avoid the short circuit phenomenon caused by the contact between the shell 1 and the cover plate 2, therefore, a gap is formed between the flanging structure 13 and the crimping structure 22, the flanging structure and the crimping structure are not in direct contact with each other, for fixing the shell 1 and the cover plate 2, preferably, the gap between the flanging structure 13 and the crimping structure 22 is filled with the foaming adhesive 3, the foaming adhesive 3 has excellent adhesion, and has the advantages of light weight, water resistance, insulation and the like after being cured.
In some embodiments, the button cell further comprises a sealing element 4, the cover plate 2 is provided with a liquid injection hole 23, and the sealing element 4 is arranged in the liquid injection hole 23 in a penetrating way and is fixedly connected with the cover plate 2.
Annotate the notes liquid of the setting of liquid hole 23 after casing 1 and apron 2 sealed of being convenient for, sealing member 4 is used for sealed liquid hole 23 of annotating, avoids revealing of electrolyte, sealing member 4 can adopt laser welding's mode fixed with apron 2.
Note that, the cover plate 2 may be provided with or without the injection hole 23, and is not particularly limited, and referring to fig. 3, if the injection hole is not provided, the sealing between the cover plate 2 and the case 1 is performed after the injection is completed when the button cell is assembled.
In some embodiments, the button cell further includes a cell 5, the cell 5 is disposed in the accommodating cavity, the cell 5 includes a positive tab 51 and a negative tab 52, the casing 1 is electrically insulated from the cover plate 2, and the negative tab 52 is electrically connected to the cover plate 2; the positive electrode tab 51 is electrically connected to the case 1.
The battery cell 5 is formed by winding a positive plate, a diaphragm and a negative plate which are sequentially arranged at intervals, and in the utility model, the positive plate, the diaphragm and the negative plate can be made of materials commonly used in the field, and are not particularly limited.
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 (10)
1. A button cell is characterized by comprising a shell, a cover plate and foaming adhesive;
the shell comprises a bottom wall and a side wall arranged on the periphery of the bottom wall, and an outward-wound flanging structure is arranged at the end part, far away from the bottom wall, of the side wall;
the cover plate comprises a cover plate main body and an inward-winding crimping structure extending from the edge of the cover plate main body;
the edge curling structure wraps the edge curling structure, and the foaming adhesive is arranged between the edge curling structure and the edge curling structure so as to clamp and fix the cover plate on the shell;
an accommodating cavity is formed between the shell and the cover plate.
2. The button cell according to claim 1, wherein the flange structure has a first flange portion that is inclined from an end of the side wall toward a direction near a central axis of the receiving cavity.
3. The button cell according to claim 2, wherein the angle α between the first flange portion and the sidewall is: alpha is more than 90 degrees and less than 180 degrees.
4. The button cell according to claim 2, wherein the flanging structure further comprises a second flanging part, a third flanging part and a fourth flanging part, and the first flanging part, the second flanging part, the third flanging part and the fourth flanging part are connected in sequence;
the second flange portion extends from the first flange portion in a direction away from the plane of the bottom wall;
the third flanging part extends from the second flanging part towards the direction departing from the central axis of the accommodating cavity;
the fourth burring part extends from the third burring part toward the direction of the plane of the bottom wall.
5. The button cell according to claim 4, wherein the crimping structure has a first crimping portion that is biased away from the edge of the cover body in a direction away from the central axis of the receiving cavity.
6. The button cell according to claim 5, wherein the angle β between the first crimping portion and the cover main body is: beta is more than 90 degrees and less than 180 degrees.
7. The button cell according to claim 5, wherein the crimping structure further comprises a second crimping portion, a third crimping portion, a fourth crimping portion, a fifth crimping portion and a sixth crimping portion, wherein the first crimping portion, the second crimping portion, the third crimping portion, the fourth crimping portion, the fifth crimping portion and the sixth crimping portion are connected in sequence;
the second hem portion extending from the first hem portion in a direction away from the plane of the bottom wall;
the third crimping part extends from the second crimping part towards the direction departing from the central axis of the accommodating cavity;
the fourth bead portion extends from the third bead portion toward the plane of the bottom wall;
the fifth curled portion extends from the fourth curled portion toward a direction of a central axis of the accommodating chamber;
the sixth bead portion extends from the fifth bead portion in a direction away from the plane of the bottom wall.
8. The button cell according to claim 7, wherein the fourth flanging part is disposed between the fourth and sixth flanging parts, and the housing and the cover plate are locked and fixed.
9. The button cell according to claim 1, further comprising a sealing member, wherein the cover plate has a liquid injection hole, and the sealing member is inserted into the liquid injection hole and is fixedly connected to the cover plate.
10. The button cell battery according to claim 1, further comprising a cell disposed in the accommodating cavity, wherein the cell comprises a positive electrode tab and a negative electrode tab, the casing is electrically insulated from the cover plate, and the negative electrode tab is electrically connected to the cover plate; the positive pole lug is electrically connected with the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122861798.7U CN216597683U (en) | 2021-11-19 | 2021-11-19 | Button cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122861798.7U CN216597683U (en) | 2021-11-19 | 2021-11-19 | Button cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216597683U true CN216597683U (en) | 2022-05-24 |
Family
ID=81646401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122861798.7U Active CN216597683U (en) | 2021-11-19 | 2021-11-19 | Button cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216597683U (en) |
-
2021
- 2021-11-19 CN CN202122861798.7U patent/CN216597683U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |