CN216015531U - Button cell - Google Patents
Button cell Download PDFInfo
- Publication number
- CN216015531U CN216015531U CN202121702116.1U CN202121702116U CN216015531U CN 216015531 U CN216015531 U CN 216015531U CN 202121702116 U CN202121702116 U CN 202121702116U CN 216015531 U CN216015531 U CN 216015531U
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- Prior art keywords
- annular
- ring
- cover
- shell
- outer side
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- 238000007789 sealing Methods 0.000 claims abstract description 15
- 238000003466 welding Methods 0.000 claims description 28
- 239000002390 adhesive tape Substances 0.000 claims description 10
- 241000681094 Zingel asper Species 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 238000000149 argon plasma sintering Methods 0.000 claims description 6
- -1 polypropylene Polymers 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 230000005389 magnetism Effects 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive Effects 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims description 2
- 238000001746 injection moulding Methods 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium Ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 8
- 229910001416 lithium ion Inorganic materials 0.000 description 8
- 238000000034 method Methods 0.000 description 2
- 230000001808 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000002093 peripheral Effects 0.000 description 1
- 239000000243 solution Substances 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The utility model relates to a button cell, which comprises a cell, a shell and a cover plate assembly, wherein one end of the shell is provided with an opening, and the cell is arranged in the shell; the cover plate assembly comprises a ring cover, an insulating rubber ring and a pole cover plate, the insulating rubber ring comprises an annular main body and an annular rubber strip connected to the lower surface of the annular main body, the section shape of the annular rubber strip is wedge-shaped, an annular wedge-shaped groove matched with the section shape of the annular rubber strip is formed between the inner side surface of the ring cover and the outer side surface of the pole cover plate, the annular rubber strip is embedded in the annular wedge-shaped groove, and the outer edge of the ring cover is hermetically connected with the opening end of the shell. According to the button cell, the annular rubber strip of the insulating rubber ring is embedded in the annular wedge-shaped groove, so that the outer side surface of the annular rubber strip is in close contact with the inner side surface of the ring cover, and the inner side surface of the annular rubber strip is in close contact with the outer side surface of the pole cover plate, and therefore the sealing performance of the cover plate assembly is greatly improved, the interior of the shell can be effectively sealed, and electrolyte leakage and water inflow are prevented.
Description
Technical Field
The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a button cell.
Background
The lithium ion battery has the advantages of high energy density, high working voltage, low self-discharge rate and no memory effect, is widely applied to the fields of notebooks, electric tools, electric automobiles and the like, and provides stable and safe power output for the batteries.
At present, a shell of a lithium ion battery is internally provided with electrolyte and an electrolyte sealing structure, and two ends of the shell are respectively plugged by an upper cover plate and a lower cover plate. In order to prevent the electrolyte inside the lithium ion battery from leaking and flowing to the outside from the upper cover plate when the electrolyte sealing structure fails, and to corrode the peripheral lithium ion battery, a sealing ring is usually arranged between the upper cover plate and the pole in the prior art for sealing. However, when the electrolyte inside the lithium ion battery leaks, the internal pressure is large, the sealing ring is difficult to effectively seal the leaked electrolyte, and the electrolyte still leaks to the outside. That is, the conventional lithium ion battery has poor sealing performance, cannot effectively seal the inside of a battery case, and is easily damaged by leakage or water inflow of an electrolyte.
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 lithium ion battery has poor sealing performance and can not effectively seal the inside of a battery shell.
In order to solve the above technical problems, an embodiment of the present invention provides a button cell, including a cell, a casing and a cover plate assembly, where the casing is a barrel structure with an opening at one end, and the cell is installed in the casing;
the apron subassembly includes ring lid, insulating rubber ring and utmost point post apron, the insulating rubber ring includes annular main part and connects the annular adhesive tape at the annular main part lower surface, the cross sectional shape of annular adhesive tape is the big wedge of the little lower extreme in upper end, the medial surface of ring lid with be formed with between the lateral surface of utmost point post apron with the annular wedge groove that the cross sectional shape of annular adhesive tape matches, the annular adhesive tape inlays to be established annular wedge inslot, the outward flange of ring lid with the open end sealing connection of casing.
Optionally, the battery cell comprises a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, the positive plate is provided with a positive tab, the negative plate is provided with a negative tab, the positive tab is connected with the pole cover plate, and the negative tab is connected with the bottom wall of the shell;
the pole cover plate is in a cross section shape formed by sectioning along the longitudinal direction of the button cell.
Optionally, the ring lid includes the annular lid and the annular ring of body coupling, the annular ring is connected on the lower surface of annular lid, the medial surface welding of annular ring is in on the lateral surface of casing, the lower surface of annular lid hugs closely on the terminal surface of the open end of casing, the medial surface of annular lid with form between the lateral surface of utmost point post apron cyclic annular wedge groove.
Optionally, an insulating pin is inserted into the center of the battery cell, the longitudinal section of the insulating pin is in an i-shape, the upper end face of the insulating pin supports the positive electrode tab, and the lower end face of the insulating pin abuts against the negative electrode tab;
the upper end surface of the battery cell is provided with an insulating magnetism isolating layer, and the inner side surface of the shell is plated with an insulating inner layer; the insulating magnetic-isolating layer comprises a metal clapboard and a polypropylene adhesive layer covering the upper surface of the metal clapboard, and the insulating inner layer is made of polypropylene;
the insulating inner layer is provided with a avoiding hole for the negative pole lug to pass through, the negative pole lug passes through the avoiding hole and the bottom wall of the shell is welded, and the positive pole lug is welded with the pole cover plate.
Optionally, a first microstructure formed by laser sintering is arranged on the surface of the ring cover in contact with the insulating rubber ring, and a second microstructure formed by laser sintering is arranged on the surface of the pole cover plate in contact with the insulating rubber ring.
Optionally, the first microstructure is one of a rectangular groove, a triangular groove or a U-shaped groove, and the second microstructure is one of a rectangular groove, a triangular groove or a U-shaped groove; the annular rubber strip of the insulating rubber ring is embedded between the ring cover and the pole cover plate in an injection molding hot pressing mode, the outer side face of the annular rubber strip is extruded into the first miniature structure, and the inner side face of the annular rubber strip is extruded into the second miniature structure.
Optionally, an annular ring of the ring cover is welded on the outer side surface of the shell, and a welding point between the annular ring and the outer side surface of the shell is located between the lower surface of the annular ring and the outer side surface of the shell;
or the welding point of the annular ring and the outer side face of the shell is positioned between the inner side face of the annular ring and the outer side face of the shell.
Optionally, the annular ring is a stepped ring, and a welding point between the annular ring and the outer side surface of the casing is located between the inner side surface of the small diameter section of the annular ring and the outer side surface of the casing.
Optionally, the ring cover comprises an annular cover and an annular convex strip which are integrally connected, the annular convex strip is connected to the lower surface of the annular cover, and the longitudinal section of the ring cover is in a T shape; the lower surface of the annular cover is tightly attached to the end face of the opening end of the shell, the annular convex strip extends into the shell, the outer side surface of the annular convex strip abuts against the inner side surface of the shell, and a gap is reserved between the inner side surface of the annular convex strip and the battery cell; the annular wedge-shaped groove is formed between the inner side surface of the annular cover and the outer side surface of the pole cover plate.
Optionally, the ring cover comprises an annular cover, an annular outer ring and an annular inner ring which are integrally connected, the annular outer ring and the annular inner ring are sequentially connected to the lower surface of the annular cover from outside to inside, and an annular groove is formed between the annular outer ring and the annular inner ring; the opening end of the shell is inserted into the annular groove, the inner side surface of the annular outer ring is welded on the outer side surface of the shell, and the outer side surface of the annular inner ring is tightly propped against the inner side surface of the shell; the lower surface of the annular cover is tightly attached to the end face of the opening end of the shell, and the annular wedge-shaped groove is formed between the inner side face of the annular cover and the outer side face of the pole cover plate.
According to the button cell provided by the embodiment of the utility model, an annular wedge-shaped groove is formed between the inner side surface of the ring cover and the outer side surface of the pole cover plate, and an annular adhesive tape of the insulating rubber ring is embedded in the annular wedge-shaped groove; the section of the annular rubber strip is wedge-shaped, so that the annular rubber strip is not easy to fall off, the outer side surface of the annular rubber strip is in close contact with the inner side surface of the ring cover, and the inner side surface of the annular rubber strip is in close contact with the outer side surface of the pole cover plate; meanwhile, the lower surface of the annular main body is tightly pressed on the upper surfaces of the pole cover plate and the ring cover, and the outer edge of the ring cover is hermetically connected with the opening end of the shell; thereby make the sealing performance of whole apron subassembly obtain very big improvement, can effectively seal the casing inside, prevent that electrolyte from revealing and intaking.
Drawings
Fig. 1 is a schematic perspective view of a button cell provided in a first embodiment of the utility model;
fig. 2 is a schematic structural diagram of a button cell provided by a first embodiment of the utility model, which is cut along the longitudinal direction;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is an enlarged view of a portion of FIG. 2 at B;
fig. 5 is a schematic view of a welding spot of a button cell provided by a first embodiment of the utility model after welding an annular ring and a housing by a first welding method;
fig. 6 is a schematic view of the initial welding position of the button cell provided by the first embodiment of the utility model when the annular ring and the shell are welded by a second welding method;
fig. 7 is a schematic view of the initial welding position of the button cell battery provided by the first embodiment of the utility model when the annular ring and the shell are welded by a third welding method;
fig. 8 is a partially enlarged schematic view of the connection between the ring cover and the housing of the button cell battery provided by the second embodiment of the utility model;
fig. 9 is a partially enlarged schematic view of the connection between the ring cover and the housing of the button cell provided by the third embodiment of the utility model.
The reference numerals in the specification are as follows:
1. a housing; 11. an insulating inner layer; 11a, avoiding holes;
2. an electric core; 21. a positive electrode tab; 22. a negative electrode tab; 23. an insulating magnetism isolating layer;
3. a cover plate assembly; 31. a ring cover; 311. an annular cover; 312. an annular ring; 313. an annular rib; 314. an annular outer ring; 315. an annular inner ring; 32. an insulating rubber ring; 321. an annular body; 322. an annular adhesive tape; 33. a pole cover plate;
4. and (4) insulating the pin.
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 "upper", "lower", "inside", "outside", and the like in the following description are relative concepts to each other, and should not be construed as limiting.
As shown in fig. 1 to 4, a button cell provided in a first embodiment of the present invention includes a cell 2, a casing 1 and a cover plate assembly 3, where the casing 1 is a barrel structure with an opening at one end, and the cell 2 is installed in the casing 1.
The cover plate assembly 3 comprises a ring cover 31, an insulating rubber ring 32 and a pole cover plate 33, the insulating rubber ring 32 comprises an annular main body 321 and an annular rubber strip 322 connected to the lower surface of the annular main body 321, and the section of the annular rubber strip 322 is in the shape of a wedge with a small upper end and a large lower end. An annular wedge-shaped groove matched with the cross-sectional shape of the annular rubber strip 322 is formed between the inner side surface of the ring cover 31 and the outer side surface of the pole cover plate 33. The annular rubber strip 322 is embedded in the annular wedge-shaped groove, so that the ring cover 31, the insulating rubber ring 32 and the pole cover plate 33 are hermetically connected. The outer edge of the ring cover 31 is connected with the opening end of the shell 1 in a sealing way. The ring cover 31 is made of metal.
In the first embodiment, the battery cell 2 includes a positive plate, a negative plate, and a diaphragm disposed between the positive plate and the negative plate, the positive plate leads out a positive tab 21, the negative plate leads out a negative tab 22, the positive tab 21 is connected to the pole cover plate 33, and the negative tab 22 is connected to the bottom wall of the casing 1.
In the first embodiment, the cross-sectional shape of the pole cover plate 33 cut along the longitudinal direction of the button cell is "n" shape, and the upper surface of the outer edge of the pole cover plate 33 can be tightly attached to the lower surface of the annular main body 321, so that the sealing connection between the pole cover plate and the insulating rubber ring 32 is facilitated, and the sealing performance of the whole cover plate assembly 3 is improved.
In the first embodiment, the ring cover 31 includes an annular cover 311 and an annular ring 312 that are integrally connected, the annular ring 312 is connected to an outer edge of the annular cover 311, an inner side surface of the annular ring 312 is welded to an outer side surface of the housing 1, a lower surface of the annular cover 311 is closely attached to an end surface of the open end of the housing 1, and the annular wedge-shaped groove is formed between the inner side surface of the annular cover 311 and the outer side surface of the pole cover plate 33.
In the first embodiment, an insulating pin 4 is inserted into the center of the battery cell 2, the insulating pin 4 has an i-shaped longitudinal cross section, the upper end surface of the insulating pin 4 supports the positive electrode tab 21, and the lower end surface of the insulating pin 4 abuts against the negative electrode tab 2. The insulating pin 4 supports the positive pole tab 21, which is convenient to weld with the pole cover plate 33. Preferably, the insulating pin 4 is made of a non-metal material, and the upper end and the lower end of the insulating pin 4 are provided with hexagonal prism-shaped heads.
In the first embodiment, an insulating magnetism isolating layer 23 is arranged on the upper end surface of the electric core 2, and an insulating inner layer 11 is plated on the inner side surface of the shell 1; the insulating and magnetic-isolating layer 23 includes a metal spacer (not shown in the figure) and a polypropylene adhesive layer covering the upper surface of the metal spacer, and the insulating inner layer 11 is made of polypropylene. The insulating magnetism isolating layer 23 can play a role in shielding a magnetic field and insulating the cover plate assembly 3, and the insulating inner layer 11 can play a role in insulating the shell 1 from the battery core 2.
As shown in fig. 3, an avoiding hole 11a is formed in the insulating inner layer 11 for allowing the negative electrode tab 22 to pass through, and the negative electrode tab 22 passes through the avoiding hole 11a and is welded to the bottom wall of the casing 1. The positive pole tab 21 is welded with the pole cover plate 33.
A method for manufacturing a button cell provided by a first embodiment of the utility model includes the following steps:
s1, forming a first microstructure on the surface, in contact with the insulating rubber ring 32, of the ring cover 31 through laser sintering, wherein the first microstructure is one of a rectangular groove, a triangular groove and a U-shaped groove; and forming a second micro structure on the surface of the pole cover plate 33, which is in contact with the insulating rubber ring 32, by laser sintering, wherein the second micro structure is one of a rectangular groove, a triangular groove and a U-shaped groove.
And S2, the ring cover 31, the insulating rubber ring 32 and the pole cover plate 33 are hot-pressed together through an injection mold, so that the annular rubber strip 322 of the insulating rubber ring 32 is embedded between the pole cover plate 33 and the ring cover 31, the outer side surface of the annular rubber strip 322 is extruded into the first microstructure, and the inner side surface of the annular rubber strip 322 is extruded into the second microstructure.
S3, laser welding the annular ring 312 of the ring cover 31 on the outer side surface of the housing 1.
When the first welding method is used to weld the annular ring and the shell, as shown in fig. 5, the welding point between the annular ring 312 and the outer side surface of the shell 1 is located between the lower surface of the annular ring 312 and the outer side surface of the shell 1, and the specific step S3 includes: the gap between the lower surface of the annular ring 312 and the outer side surface of the housing 1 is laser welded.
When the annular ring and the shell are welded by the first welding method, as shown in fig. 6, the welding point between the annular ring 312 and the outer side of the shell 1 is located between the inner side of the annular ring 312 and the outer side of the shell 1, and the specific step S3 includes: laser welding is performed from the outer side surface of the annular ring 312 toward the outer side surface of the housing 1, and a welding spot of the laser welding connects the inner side surface of the annular ring 312 and the outer side surface of the housing 1. In this process, the starting position of the spot of the laser welding is shown in fig. 6.
When the annular ring and the shell are welded by the third welding method, as shown in fig. 7, the annular ring 312 is a stepped ring, and a welding point between the annular ring 312 and the outer side surface of the shell 1 is located between the inner side surface of the annular ring 312 and the outer side surface of the shell 1, and the specific step S3 includes: laser welding is performed from the outer side surface of the small-diameter section of the annular ring 312 toward the outer side surface of the housing 1, and a weld point of the laser welding connects the inner side surface of the small-diameter section of the annular ring 312 and the outer side surface of the housing 1. In this process, the starting position of the spot of the laser welding is shown in fig. 7.
In the button cell provided by the first embodiment of the present invention, an annular wedge-shaped groove is formed between the inner side surface of the ring cover and the outer side surface of the post cover plate, and the annular rubber strip of the insulating rubber ring is embedded in the annular wedge-shaped groove; the section of the annular rubber strip is wedge-shaped, so that the annular rubber strip is not easy to fall off, the outer side surface of the annular rubber strip is in close contact with the inner side surface of the ring cover, and the inner side surface of the annular rubber strip is in close contact with the outer side surface of the pole cover plate; meanwhile, the lower surface of the annular main body is tightly pressed on the upper surfaces of the pole cover plate and the ring cover, and the outer edge of the ring cover is hermetically connected with the opening end of the shell; thereby make the sealing performance of whole apron subassembly obtain very big improvement, can effectively seal the casing inside, prevent that electrolyte from revealing and intaking.
Second embodiment
Referring to fig. 8, a button cell according to a second embodiment of the present invention is different from the first embodiment in that the ring cover 31 includes an integrally connected annular cover 311 and an annular protruding strip 313, the annular protruding strip 313 is connected to a lower surface of the annular cover 311, and a longitudinal section of the ring cover 31 has a T-shape; the lower surface of the annular cover 311 is tightly attached to the end surface of the opening end of the shell 1, the annular protruding strip 313 extends into the shell 1, the outer side surface of the annular protruding strip 313 abuts against the inner side surface of the shell 1, and a gap is reserved between the inner side surface of the annular protruding strip 313 and the battery cell 2; the annular wedge-shaped groove is formed between the inner side surface of the annular cover 311 and the outer side surface of the pole cover plate 33.
Third embodiment
Referring to fig. 9, a button cell provided in a third embodiment of the present invention is different from the button cell in that the ring cover 31 includes an integrally connected annular cover 311, an annular outer ring 314, and an annular inner ring 315, the annular outer ring 314 and the annular inner ring 315 are sequentially connected to a lower surface of the annular cover 311 from outside to inside, and an annular groove is formed between the annular outer ring 314 and the annular inner ring 315; the opening end of the shell 1 is inserted into the annular groove, the inner side surface of the annular outer ring 314 is welded on the outer side surface of the shell 1, and the outer side surface of the annular inner ring 315 is tightly abutted on the inner side surface of the shell 1; the lower surface of the annular cover 311 is closely attached to the end surface of the opening end of the housing 1, and the annular wedge-shaped groove is formed between the inner side surface of the annular cover 311 and the outer side surface of the pole cover plate 33.
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 cell, a shell and a cover plate assembly, wherein the shell is of a barrel-shaped structure with an opening at one end, and the cell is arranged in the shell;
the apron subassembly includes ring lid, insulating rubber ring and utmost point post apron, the insulating rubber ring includes annular main part and connects the annular adhesive tape at the annular main part lower surface, the cross sectional shape of annular adhesive tape is the big wedge of the little lower extreme in upper end, the medial surface of ring lid with be formed with between the lateral surface of utmost point post apron with the annular wedge groove that the cross sectional shape of annular adhesive tape matches, the annular adhesive tape inlays to be established annular wedge inslot, the outward flange of ring lid with the open end sealing connection of casing.
2. The button cell according to claim 1, wherein the cell comprises a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, the positive plate is led out of a positive tab, the negative plate is led out of a negative tab, the positive tab is connected with the pole cover plate, and the negative tab is connected with the bottom wall of the casing;
the pole cover plate is in a cross section shape formed by sectioning along the longitudinal direction of the button cell.
3. The button cell according to claim 1, wherein the ring cover comprises an annular cover and an annular ring which are integrally connected, the annular ring is connected to the lower surface of the annular cover, the inner side surface of the annular ring is welded to the outer side surface of the casing, the lower surface of the annular cover is tightly attached to the end surface of the opening end of the casing, and the annular wedge-shaped groove is formed between the inner side surface of the annular cover and the outer side surface of the pole cover plate.
4. The button cell according to claim 2, wherein an insulating pin is inserted into the center of the cell, the insulating pin has an i-shaped longitudinal cross section, the upper end surface of the insulating pin supports the positive electrode tab, and the lower end surface of the insulating pin abuts against the negative electrode tab;
the upper end surface of the battery cell is provided with an insulating magnetism isolating layer, and the inner side surface of the shell is plated with an insulating inner layer; the insulating magnetic-isolating layer comprises a metal clapboard and a polypropylene adhesive layer covering the upper surface of the metal clapboard, and the insulating inner layer is made of polypropylene;
the insulating inner layer is provided with a avoiding hole for the negative pole lug to pass through, the negative pole lug passes through the avoiding hole and the bottom wall of the shell is welded, and the positive pole lug is welded with the pole cover plate.
5. The button cell according to claim 1, wherein the surface of the ring cover contacting the rubber insulating ring is provided with a first microstructure formed by laser sintering, and the surface of the post cover contacting the rubber insulating ring is provided with a second microstructure formed by laser sintering.
6. The button cell according to claim 5, wherein the first micro-structure is one of a rectangular groove or a triangular groove or a U-shaped groove, and the second micro-structure is one of a rectangular groove or a triangular groove or a U-shaped groove; the annular rubber strip of the insulating rubber ring is embedded between the ring cover and the pole cover plate in an injection molding hot pressing mode, the outer side face of the annular rubber strip is extruded into the first miniature structure, and the inner side face of the annular rubber strip is extruded into the second miniature structure.
7. The button cell according to claim 3, wherein the annular ring of the ring cover is welded on the outer side of the casing, and the welding point of the annular ring and the outer side of the casing is located between the lower surface of the annular ring and the outer side of the casing;
or the welding point of the annular ring and the outer side face of the shell is positioned between the inner side face of the annular ring and the outer side face of the shell.
8. The button cell according to claim 7, wherein the annular ring is a stepped ring, and the welding point of the annular ring and the outer side of the casing is located between the inner side of the small diameter section of the annular ring and the outer side of the casing.
9. The button cell according to claim 1, wherein the ring cover comprises an annular cover and an annular rib which are integrally connected, the annular rib is connected to the lower surface of the annular cover, and the longitudinal section of the ring cover is T-shaped; the lower surface of the annular cover is tightly attached to the end face of the opening end of the shell, the annular convex strip extends into the shell, the outer side surface of the annular convex strip abuts against the inner side surface of the shell, and a gap is reserved between the inner side surface of the annular convex strip and the battery cell; the annular wedge-shaped groove is formed between the inner side surface of the annular cover and the outer side surface of the pole cover plate.
10. The button cell according to claim 1, wherein the ring cover comprises an integrally connected annular cover, an annular outer ring and an annular inner ring, the annular outer ring and the annular inner ring are sequentially connected to the lower surface of the annular cover from outside to inside, and an annular groove is formed between the annular outer ring and the annular inner ring; the opening end of the shell is inserted into the annular groove, the inner side surface of the annular outer ring is welded on the outer side surface of the shell, and the outer side surface of the annular inner ring is tightly propped against the inner side surface of the shell; the lower surface of the annular cover is tightly attached to the end face of the opening end of the shell, and the annular wedge-shaped groove is formed between the inner side face of the annular cover and the outer side face of the pole cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121702116.1U CN216015531U (en) | 2021-07-23 | 2021-07-23 | Button cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121702116.1U CN216015531U (en) | 2021-07-23 | 2021-07-23 | Button cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216015531U true CN216015531U (en) | 2022-03-11 |
Family
ID=80528134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121702116.1U Active CN216015531U (en) | 2021-07-23 | 2021-07-23 | Button cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216015531U (en) |
-
2021
- 2021-07-23 CN CN202121702116.1U patent/CN216015531U/en active Active
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