CN113707982A - Button cell - Google Patents
Button cell Download PDFInfo
- Publication number
- CN113707982A CN113707982A CN202110963390.2A CN202110963390A CN113707982A CN 113707982 A CN113707982 A CN 113707982A CN 202110963390 A CN202110963390 A CN 202110963390A CN 113707982 A CN113707982 A CN 113707982A
- Authority
- CN
- China
- Prior art keywords
- sealing sheet
- sealing
- plate
- polar plate
- pole
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 152
- 239000012528 membrane Substances 0.000 claims description 36
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000010309 melting process Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/216—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for button or coin cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/247—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biophysics (AREA)
- Computer Hardware Design (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention provides a button cell, which comprises a shell, a top cover component, a pole core and a semi-closed structure, wherein one end of the semi-closed structure is provided with an opening; the top cover assembly seals an opening of the shell, so that a cavity for accommodating the pole core is formed between the top cover assembly and the shell, the top cover assembly comprises a first pole plate, a second pole plate and an insulating sealing piece, the insulating sealing piece comprises a first sealing sheet, a second sealing sheet and a connecting piece, and the connecting piece is arranged between the first sealing sheet and the second sealing sheet and is connected with the first sealing sheet and the second sealing sheet; a first groove is formed between the inner side of the connecting piece and the first sealing sheet and between the first sealing sheet and the second sealing sheet in an enclosing manner, and the outer edge of the first polar plate is accommodated in the first groove; a second groove is arranged around the outer side of the connecting piece and between the first sealing sheet and the second sealing sheet, and the inner edge of the second pole plate is accommodated in the second groove. The button cell provided by the invention has the advantage that the insulation and the sealing performance of the button cell are reliable by arranging the insulating sealing element.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a button cell battery.
Background
With the wider application of intelligent wearable products, people have wider and wider requirements on small-size lithium ion button type secondary rechargeable batteries (button type lithium ion batteries for short). Button lithium ion battery is more and more being applied to intelligence wearing product, for example be used for wireless bluetooth headset etc. along with button lithium ion battery's application is more and more wide, for example earphone etc. also more and more high to the requirement of battery. The installation of top cap and casing needs to satisfy insulating and sealed in current button cell, and current button cell leakproofness is relatively poor.
Disclosure of Invention
The invention aims to provide a button cell aiming at the problem that the insulation and the sealing performance of the insulation sealing structure of the existing button cell are poor.
The invention provides a button cell, which comprises a shell, a top cover component and a pole core, wherein the shell is of a semi-closed structure with one end open; the top cover assembly seals the opening of the shell, so that a cavity for accommodating the pole core is formed between the top cover assembly and the shell, the top cover assembly comprises a first pole plate, a second pole plate and an insulating sealing piece, the periphery of the second pole plate is connected with the edge of the opening of the shell, and a through hole is formed in the second pole plate; the first polar plate is arranged in the through hole through the insulating sealing piece; the insulating sealing element comprises a first sealing sheet, a second sealing sheet and a connecting piece, wherein the connecting piece is arranged between the first sealing sheet and the second sealing sheet and is used for connecting the first sealing sheet and the second sealing sheet; a first groove is formed between the inner side of the connecting piece and the first sealing sheet and between the inner side of the connecting piece and the second sealing sheet in an enclosing manner, and the outer edge of the first polar plate is accommodated in the first groove; a second groove is formed between the outer side of the connecting piece and the first sealing sheet and between the first sealing sheet and the second sealing sheet in an enclosing manner, and the inner edge of the second pole plate is accommodated in the second groove; the pole cores are respectively electrically connected with the first pole plate and the second pole plate, and/or the pole cores are respectively electrically connected with the first pole plate and the shell.
Optionally, the top cover assembly further comprises a waterproof membrane disposed on a side of the first sealing sheet away from the cavity.
Optionally, one surface of the first polar plate, which is away from the cavity, and one surface of the second polar plate, which is away from the cavity, are respectively in sealing connection with one side surface of the first sealing sheet; one surface of the first polar plate facing the cavity and one surface of the second polar plate facing the cavity are respectively in sealing connection with one side surface of the second sealing sheet.
Optionally, the through hole is a circular hole, and the first sealing piece and the second sealing piece are both annular pieces; the waterproof membrane is annular, the waterproof membrane with the coincidence of the central line of first gasket, the internal diameter of waterproof membrane is greater than the internal diameter of first gasket, the external diameter of waterproof membrane is less than the external diameter of first gasket.
Optionally, the connecting member is a ring-shaped member, the projection of the waterproof membrane in the direction of the connecting member covers and extends out of the connecting member, the distance from the inner edge of the waterproof membrane to the inner edge of the connecting member is greater than or equal to 1mm, the distance from the outer edge of the waterproof membrane to the outer edge of the connecting member is greater than or equal to 1mm, and the arc-shaped hole is a C-shaped hole.
Optionally, the through hole is an arc-shaped hole, and the first pole plate is an arc-shaped steel sheet matched with the arc-shaped hole; the first sealing sheet and the second sealing sheet are round sheets, and a first avoidance hole exposing the first polar plate is formed in the first sealing sheet; the second seal piece is provided with a second avoidance hole exposing the first polar plate, the first polar plate passes through the second avoidance hole and the polar core is electrically connected, and the first avoidance hole and the second avoidance hole are respectively arranged at two ends of the first polar plate.
Optionally, the diameter of the waterproof membrane is smaller than the diameter of the first sealing sheet; the projection of the waterproof membrane in the direction of the connecting piece covers and extends out of the connecting piece, and the distance from the outer edge of the waterproof membrane to the outer edge of the connecting piece is larger than or equal to 1 mm.
Optionally, the thickness of the waterproof membrane is 0.06-0.20 mm; the sum of the thickness of the first sealing sheet and the thickness of the second sealing sheet is 0.05-0.20 mm; the thickness of the first polar plate is 0.10-0.30 mm; the thickness of the second plate is 0.10-0.30 mm.
Optionally, the outer periphery of the first electrode plate and the inner periphery of the second electrode plate are respectively provided with a connecting part, and the connecting parts are respectively connected with the first sealing sheet and the second sealing sheet; the connecting part is a groove or a plurality of connecting holes.
Optionally, the first and second sealing sheets are made of thermoplastic;
the first sealing sheet and the second sealing sheet are respectively connected with the first polar plate and the second polar plate in a heat sealing mode or in a hot melting mode;
the connecting piece is formed by the first sealing sheet and/or the second sealing sheet flowing into a gap between the first polar plate and the second polar plate in the heat sealing/hot melting process;
the pole core is a winding pole core or a lamination pole core.
In the invention, the outer edge of the first polar plate is accommodated in the first groove, the inner edge of the second polar plate is accommodated in the second groove, and the first polar plate and the second polar plate are insulated by the connecting piece, thereby improving the reliability and the safety of the button cell. Meanwhile, a first groove used for containing the outer edge of the first polar plate and a second groove used for containing the inner edge of the second polar plate are formed through the first sealing sheet, the second sealing sheet and the connecting piece, so that the sealing connection is more reliable, and the leakage condition of the button cell is avoided.
Drawings
Fig. 1 is a schematic diagram of a button cell battery provided in an embodiment of the invention;
fig. 2 is an exploded view of a top cap assembly of a button cell battery according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a button cell according to an embodiment of the invention;
fig. 4 is a schematic diagram of a button cell battery provided by another embodiment of the invention;
fig. 5 is an exploded view of a top cap assembly of a button cell battery according to another embodiment of the present invention;
fig. 6 is a schematic cross-sectional view of a button cell according to another embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further 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 invention and are not intended to limit the invention.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
As shown in fig. 1-6, a button cell according to an embodiment of the present invention includes a casing 1, a top cap assembly 2, and a pole piece 3, where the casing 1 is a semi-closed structure with an open end; the top cover assembly 2 closes the opening of the housing 1, so that a cavity for accommodating the pole core 3 is formed between the top cover assembly 2 and the housing 1, the top cover assembly 2 comprises a first pole plate 21, a second pole plate 22 and an insulating sealing member 23, the periphery of the second pole plate 22 is connected with the opening edge of the housing 1, and specifically, the periphery of the second pole plate 22 is welded with the opening edge of the housing 1. The second plate 22 is provided with a through hole. The first plate 21 is mounted in the through hole through the insulating seal 23. The insulating seal member 23 includes a first sealing piece 231, a second sealing piece 232, and a connecting piece 233, and the connecting piece 233 is disposed between the first sealing piece 231 and the second sealing piece 232 and connects the first sealing piece 231 and the second sealing piece 232. A first groove is defined between the inner side of the connecting member 233 and the first sealing piece 231 and the second sealing piece 232, and the outer edge of the first plate 21 is received in the first groove. A second groove is defined between the first sealing piece 231 and the second sealing piece 232 outside the connecting piece 233, and the inner edge of the second pole plate 22 is received in the second groove. The pole core 3 is electrically connected to the first pole plate 21 and the second pole plate 22, respectively, and/or the pole core 3 is electrically connected to the first pole plate 21 and the housing 1, respectively. The inner side of the connecting member 233 refers to the side of the connecting member 233 relatively deviated from the central axis of the button cell, and the outer side of the connecting member 233 refers to the side of the connecting member 233 far away from the central axis of the button cell.
In the embodiment, the outer edge of the first polar plate 21 is accommodated in the first groove, the inner edge of the second polar plate 22 is accommodated in the second groove, and the first polar plate 21 and the second polar plate 22 are insulated by the connecting member 233, so that the reliability and the safety of the button cell are improved. Meanwhile, a first groove for accommodating the outer edge of the first polar plate 21 and a second groove for accommodating the inner edge of the second polar plate 22 are formed by the first sealing sheet 231, the second sealing sheet 232 and the connecting piece 233, so that the sealing connection is more reliable, and the leakage of the button cell is avoided.
Further, the first electrode plate 21 is a positive electrode plate, and the second electrode plate 22 is a negative electrode plate. The first polar plate 21 and the second polar plate 22 are both nickel-plated steel sheets, the polar core 3 comprises a positive tab and a negative tab, the positive tab is electrically connected with the first polar plate 21, and the negative tab is electrically connected with the second polar plate 22 through the shell 1. The waterproof film 24 is an aluminum-plastic film, and the tracing code is printed on the aluminum-plastic film, so that the information of the button cell can be traced conveniently. The waterproof film 24 and the insulating seal 23 are connected by heat sealing.
As shown in fig. 1-6, in some embodiments of the present invention, the top cover assembly 2 further comprises a waterproof membrane 24, and the waterproof membrane 24 is disposed on a side of the first sealing sheet 231 away from the cavity.
As shown in fig. 1 to 6, in some embodiments of the present invention, a surface of the first plate 21 facing away from the cavity and a surface of the second plate 22 facing away from the cavity are respectively connected to a side surface of the first sealing sheet 231 by thermal composite sealing. One surface of the first polar plate 21 facing the cavity and one surface of the second polar plate 22 facing the cavity are respectively connected with one side surface of the second sealing sheet 232 through thermal compound sealing.
Specifically, when the pole core 3 generates gas, which causes the pressure inside the casing 1 to rise, the first sealing sheet 231 and the second sealing sheet 232 drive the first pole plate 21 and the second pole plate 22 to bulge outwards, so as to prevent the button cell from exploding. The needle head penetrates through the connecting piece 233 to complete puncture liquid injection, the sealing is completed through the waterproof film 24 after the liquid injection is completed, the problem that the edge seam welding explosion point is caused by electrolyte is solved, and the structure is simple.
In this embodiment, the specific forming process of the top cover assembly 2 is as follows: the second sealing sheet 232 is placed, the first electrode plate 21 and the second electrode plate 22 are placed on the second sealing sheet 232, and the first electrode plate 21 is placed in the through hole of the second electrode plate 22 with a gap from the second electrode plate 22. The second sealing sheet 232 is placed on the first pole plate 21 and the second pole plate 22, the first sealing sheet 231 and the second sealing sheet 232 are heated and flow to the gap between the first pole plate 21 and the second pole plate 22 to form a connecting piece 233, and the first sealing sheet 231 and the second sealing sheet 232 are connected with each other. The two sides of the first polar plate 21 and the second polar plate 22 are respectively connected with the first sealing sheet 231 and the second sealing sheet 232 through thermal compound sealing to form a top cover, and meanwhile, the insulating sealing connection is realized.
As shown in fig. 2 and 3, in some embodiments of the present invention, the through hole is a circular hole 221, and the first sealing piece 231 and the second sealing piece 232 are both ring-shaped pieces. The waterproof membrane 24 is annular, the central lines of the waterproof membrane 24 and the first sealing sheet 231 are overlapped, the inner diameter of the waterproof membrane 24 is larger than that of the first sealing sheet 231, the outer diameter of the waterproof membrane 24 is smaller than that of the first sealing sheet 231, and the first electrode plate 21 and the second electrode plate 22 are prevented from being short-circuited through the waterproof membrane 24.
In some embodiments of the present invention, the connecting member 233 is a ring-shaped member, the projection of the waterproof membrane 24 in the direction of the connecting member 233 covers and extends out of the connecting member 233, the distance that the inner edge of the waterproof membrane 24 extends out of the inner edge of the connecting member 233 is greater than or equal to 1mm, and the distance that the outer edge of the waterproof membrane 24 extends out of the outer edge of the connecting member 233 is greater than or equal to 1mm, so as to prevent moisture from entering the housing 1.
As shown in fig. 5 and 6, in some embodiments of the present invention, the through hole is an arc hole 222, and the first plate 21 is an arc steel sheet matched with the arc hole 222. The first sealing piece 231 and the second sealing piece 232 are circular pieces, and a first avoidance hole 2311 exposing the first polar plate 21 is formed in the first sealing piece 231. Be provided with on the second gasket 232 and expose first polar plate 21's second dodge hole 2321, first polar plate 21 passes through second dodge hole 2321 with the pole piece 3 is connected, first dodge hole 2311 with second dodge hole 2321 and set up respectively first polar plate 21's both ends are through setting up first polar plate 21 to the arc, and external and 1 interior pole piece 3 of casing are connected respectively at first polar plate 21 both ends, form the arc electric current, and the electric current direction of arc electric current is opposite with the electric current direction that produces in the pole piece 3 to offset the inside magnetic field that produces of pole piece 3. Specifically, the arc-shaped holes may be C-shaped holes.
In some embodiments of the invention, as shown in fig. 6, the diameter of the waterproofing membrane 24 is smaller than the diameter of the first sealing flap 231. The projection of the waterproof membrane 24 in the direction of the connecting piece 233 covers and extends out of the connecting piece 233, and the distance from the outer edge of the waterproof membrane 24 to the outer edge of the connecting piece 233 is greater than or equal to 1mm, so that external moisture is prevented from entering the housing 1. Further, the waterproof film 24 is provided with an escape circular hole exposing the first electrode plate 21.
In some embodiments of the present invention, the thickness of the waterproof film 24 is 0.06 to 0.20 mm. The sum of the thickness of the first seal piece 231 and the thickness of the second seal piece 232 is 0.05-0.20 mm. The thickness of the first polar plate 21 is 0.10-0.30 mm. The thickness of the second plate 22 is 0.10-0.30 mm. The space utilization of the top cap assembly 2 is increased by limiting the thicknesses of the waterproof film 24, the first sealing sheet 231, the second sealing sheet 232, the first polar plate 21, and the second polar plate 22.
As shown in fig. 2 and 3, in some embodiments of the present invention, the outer circumference of the first electrode plate 21 and the inner circumference of the second electrode plate 22 are respectively provided with a connection portion 25, the connection portions 25 are respectively connected to the first sealing fin 231 and the second sealing fin 232, and the connection strength between the first sealing fin 231 and the second sealing fin 232 and the first electrode plate 21 and the second electrode plate 22 is increased by providing the connection portions 25.
As shown in fig. 2 and 3, in some embodiments of the present invention, the connecting portion 25 is a groove or a plurality of connecting holes, and the first sealing piece 231 and the second sealing piece 232 flow into the groove or the connecting holes after being heated and then form a connecting column after being cooled, so as to increase the connecting strength.
In some embodiments of the present invention, the first sealing sheet 231 and the second sealing sheet 232 are made of thermoplastic plastics, and the first sealing sheet 231 and the second sealing sheet 232 are respectively connected to the first pole plate 21 and the second pole plate 22 by heat sealing or thermal fusion.
The connection member 233 is formed by the first sealing fin 231 and/or the second sealing fin 232 flowing into the gap between the first pole plate 21 and the second pole plate 22 during the heat sealing/fusing process;
the pole core 3 is a winding pole core or a lamination pole core.
The above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: modifications of the technical solutions described in the embodiments or equivalent replacements of some technical features may still be made. Such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and 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 top cover component and a pole core, wherein the shell is of a semi-closed structure with one end open; the top cover assembly seals the opening of the shell, so that a cavity for accommodating the pole core is formed between the top cover assembly and the shell, the top cover assembly comprises a first pole plate, a second pole plate and an insulating sealing piece, the periphery of the second pole plate is connected with the edge of the opening of the shell, and a through hole is formed in the second pole plate; the first polar plate is arranged in the through hole through the insulating sealing piece; the insulating sealing element comprises a first sealing sheet, a second sealing sheet and a connecting piece, wherein the connecting piece is arranged between the first sealing sheet and the second sealing sheet and is used for connecting the first sealing sheet and the second sealing sheet; a first groove is formed between the inner side of the connecting piece and the first sealing sheet and between the inner side of the connecting piece and the second sealing sheet in an enclosing manner, and the outer edge of the first polar plate is accommodated in the first groove; a second groove is formed between the outer side of the connecting piece and the first sealing sheet and between the first sealing sheet and the second sealing sheet in an enclosing manner, and the inner edge of the second pole plate is accommodated in the second groove; the pole cores are respectively electrically connected with the first pole plate and the second pole plate, and/or the pole cores are respectively electrically connected with the first pole plate and the shell.
2. The button cell according to claim 1, wherein the top cover assembly further comprises a waterproof membrane disposed on a side of the first sealing sheet away from the cavity.
3. The button cell according to claim 2, wherein the surface of the first polar plate facing away from the cavity and the surface of the second polar plate facing away from the cavity are respectively connected with one side surface of the first sealing sheet in a sealing manner; one surface of the first polar plate facing the cavity and one surface of the second polar plate facing the cavity are respectively in sealing connection with one side surface of the second sealing sheet.
4. The button cell according to claim 3, wherein the through hole is a circular hole, and the first sealing sheet and the second sealing sheet are both ring-shaped sheets; the waterproof membrane is annular, the waterproof membrane with the coincidence of the central line of first gasket, the internal diameter of waterproof membrane is greater than the internal diameter of first gasket, the external diameter of waterproof membrane is less than the external diameter of first gasket.
5. The button cell according to claim 4, wherein the connector is a ring-shaped member, the waterproof membrane is projected in the direction of the connector to cover and extend out of the connector, and the inner edge of the waterproof membrane extends out of the inner edge of the connector by a distance greater than or equal to 1mm, and the outer edge of the waterproof membrane extends out of the outer edge of the connector by a distance greater than or equal to 1 mm.
6. The button cell according to claim 3, wherein the through hole is an arc-shaped hole, and the first polar plate is an arc-shaped steel sheet matched with the arc-shaped hole; the first sealing sheet and the second sealing sheet are round sheets, and a first avoidance hole exposing the first polar plate is formed in the first sealing sheet; the second seal piece is provided with a second avoidance hole exposing the first polar plate, the first polar plate passes through the second avoidance hole and the polar core is electrically connected, and the first avoidance hole and the second avoidance hole are respectively arranged at two ends of the first polar plate.
7. The button cell according to claim 6, wherein the waterproof membrane has a diameter smaller than that of the first sealing sheet; the projection of the waterproof membrane in the direction of the connecting piece covers and extends out of the connecting piece, the distance from the outer edge of the waterproof membrane to the outer edge of the connecting piece is larger than or equal to 1mm, and the arc-shaped hole is a C-shaped hole.
8. The button cell according to claim 2, wherein the waterproof film has a thickness of 0.06-0.20 mm; the sum of the thickness of the first sealing sheet and the thickness of the second sealing sheet is 0.05-0.20 mm; the thickness of the first polar plate is 0.10-0.30 mm; the thickness of the second plate is 0.10-0.30 mm.
9. The button cell according to claim 1, wherein the outer periphery of the first plate and the inner periphery of the second plate are respectively provided with a connecting part, and the connecting parts are respectively connected with the first sealing sheet and the second sealing sheet; the connecting part is a groove or a plurality of connecting holes.
10. The button cell according to claim 1, wherein the first sealing sheet and the second sealing sheet are made of thermoplastic plastic;
the first sealing sheet and the second sealing sheet are respectively connected with the first polar plate and the second polar plate in a heat sealing mode or in a hot melting mode;
the connecting piece is formed by the first sealing sheet and/or the second sealing sheet flowing into a gap between the first polar plate and the second polar plate in the heat sealing/hot melting process;
the pole core is a winding pole core or a lamination pole core.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110963390.2A CN113707982A (en) | 2021-08-20 | 2021-08-20 | Button cell |
| PCT/CN2022/108424 WO2023020231A1 (en) | 2021-08-20 | 2022-07-28 | Button cell |
| CN202290000190.5U CN221150180U (en) | 2021-08-20 | 2022-07-28 | Button cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110963390.2A CN113707982A (en) | 2021-08-20 | 2021-08-20 | Button cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113707982A true CN113707982A (en) | 2021-11-26 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110963390.2A Pending CN113707982A (en) | 2021-08-20 | 2021-08-20 | Button cell |
| CN202290000190.5U Active CN221150180U (en) | 2021-08-20 | 2022-07-28 | Button cell |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202290000190.5U Active CN221150180U (en) | 2021-08-20 | 2022-07-28 | Button cell |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN113707982A (en) |
| WO (1) | WO2023020231A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023020231A1 (en) * | 2021-08-20 | 2023-02-23 | 曙鹏科技（深圳）有限公司 | Button cell |
| US12034169B2 (en) * | 2021-12-22 | 2024-07-09 | Zhuhai Cosmx Battery Co., Ltd. | Battery and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101117753B1 (en) * | 2006-09-07 | 2012-03-12 | 히다치 막셀 가부시키가이샤 | Battery separator, method for manufacture thereof, and lithium secondary battery |
| CN213583962U (en) * | 2020-11-27 | 2021-06-29 | 深圳市能锐创新科技有限公司 | Button type lithium ion battery |
| CN213782220U (en) * | 2020-11-27 | 2021-07-23 | 深圳市能锐创新科技有限公司 | Button type lithium ion battery |
| CN213782114U (en) * | 2020-12-22 | 2021-07-23 | 深圳市格瑞普电池有限公司 | Button type lithium ion battery and combined cover suitable for button type lithium ion battery |
| CN215869508U (en) * | 2021-01-15 | 2022-02-18 | 深圳市格瑞普电池有限公司 | Lithium ion battery and combined cover suitable for lithium ion battery |
| CN216015453U (en) * | 2021-08-18 | 2022-03-11 | 曙鹏科技（深圳）有限公司 | Button cell |
| CN216015516U (en) * | 2021-08-18 | 2022-03-11 | 曙鹏科技（深圳）有限公司 | Button cell |
| CN216015545U (en) * | 2021-08-20 | 2022-03-11 | 曙鹏科技（深圳）有限公司 | Button cell |
| CN113707982A (en) * | 2021-08-20 | 2021-11-26 | 曙鹏科技（深圳）有限公司 | Button cell |
-
2021
- 2021-08-20 CN CN202110963390.2A patent/CN113707982A/en active Pending
-
2022
- 2022-07-28 WO PCT/CN2022/108424 patent/WO2023020231A1/en active Application Filing
- 2022-07-28 CN CN202290000190.5U patent/CN221150180U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023020231A1 (en) * | 2021-08-20 | 2023-02-23 | 曙鹏科技（深圳）有限公司 | Button cell |
| US12034169B2 (en) * | 2021-12-22 | 2024-07-09 | Zhuhai Cosmx Battery Co., Ltd. | Battery and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023020231A1 (en) | 2023-02-23 |
| CN221150180U (en) | 2024-06-14 |
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