CN211350856U - Double-winding type button battery - Google Patents
Double-winding type button battery Download PDFInfo
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- CN211350856U CN211350856U CN202020169566.8U CN202020169566U CN211350856U CN 211350856 U CN211350856 U CN 211350856U CN 202020169566 U CN202020169566 U CN 202020169566U CN 211350856 U CN211350856 U CN 211350856U
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- 238000004804 winding Methods 0.000 title claims abstract description 63
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 229920001971 elastomer Polymers 0.000 claims abstract description 19
- 239000005060 rubber Substances 0.000 claims abstract description 19
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 11
- 230000015556 catabolic process Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 7
- 238000004880 explosion Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- -1 polyethylene Polymers 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
Images
Classifications
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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
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a two winding formula button cell. The button battery comprises a positive electrode shell, a negative electrode shell and a double-winding battery cell; the positive electrode shell and the negative electrode shell are buckled with each other and are sealed and isolated by a sealing rubber ring; the double-winding battery cell is arranged in a cavity body formed by buckling the positive electrode shell and the negative electrode shell; the double-winding battery cell is formed by winding a positive plate and a negative plate which are isolated by an isolating film; and the positive plate and the negative plate on the double-winding battery cell are respectively electrically connected with the positive shell and the negative shell through the positive lug and the negative lug. The electric core of the button battery is a double-winding type electric core, has higher charge and discharge efficiency, and can still ensure higher charge and discharge efficiency even under the requirement of thinner height-diameter ratio; moreover, the button cell has good explosion-proof and pressure relief functions, can effectively prevent welding breakdown in the production welding process, avoids shell wall breakdown leakage, and is favorable for ensuring the quality of the button cell.
Description
Technical Field
The utility model relates to a button cell technical field, concretely relates to two winding formula button cell.
Background
The button cell has the characteristics of small volume and single power supply, and has the advantages of low cost, convenient installation and carrying, and wide application in a plurality of devices or electronic products. Moreover, with the development of economic technology, button batteries are increasingly demanded in various industries.
Button cells are generally large in diameter and thin in thickness, i.e., have a small aspect ratio. The electric core of the button battery commonly seen in the market at present is mostly in a single winding form, the charging and discharging efficiency is low, and the charging efficiency is gradually caught in the development of various electronic products or equipment. Moreover, due to the development demand of various electronic products or devices and the compact design of the structure, it is desirable that the button cell can be made thinner, and a higher requirement is placed on the aspect ratio of the button cell. However, the conventional coiled button battery has lower charging and discharging efficiency under the condition that the height-diameter ratio is less than or equal to 0.38, and the phenomenon of pole breaking of a battery core is easy to occur, so that the quality of the battery is seriously influenced, and the service life of the battery is shortened.
In addition, when the button battery is made thinner, the safety performance of the battery needs to be ensured, and the requirements for explosion-proof and pressure relief functions are higher. Moreover, the process precision of the production process of the thinner button battery is higher, the breakdown phenomenon easily occurs in the high-current welding process between the outer shell and the battery core lug, and the improvement of the production yield of the battery is not facilitated.
Disclosure of Invention
An object of the utility model is to provide a two winding formula button cell to the defect or not enough that exist among the prior art. The battery cell of the button battery is a double-winding battery cell, has higher charge-discharge efficiency, and can still ensure higher charge-discharge efficiency even under the requirement of thinner aspect ratio; moreover, the button cell has good explosion-proof and pressure relief functions, can effectively prevent welding breakdown in the production welding process, avoids shell wall breakdown leakage, and is favorable for ensuring the quality of the button cell.
The purpose of the utility model is realized through the following technical scheme.
A double-winding type button battery comprises a positive electrode shell, a negative electrode shell and a double-winding battery core; the positive electrode shell and the negative electrode shell are buckled with each other and are sealed, insulated and isolated by a sealing rubber ring; the double-winding battery cell is arranged in a cavity body formed by buckling the positive electrode shell and the negative electrode shell;
the double-winding battery cell is formed by winding a positive plate and a negative plate which are isolated by an isolating film; and the positive plate and the negative plate on the double-winding battery cell are respectively electrically connected with the positive shell and the negative shell through the positive lug and the negative lug.
In a preferred embodiment, the inner bottom surface of the positive electrode shell is provided with an inward convex bulge; the bulge is welded with the positive lug.
In a more preferred embodiment, the projections are two or more independent of each other.
In a preferred embodiment, the negative electrode can is internally buckled into the positive electrode can; the edge of the opening end of the positive electrode shell is provided with an inward-bent buckling edge; the negative electrode shell is provided with an inward concave structure matched with the buckling edge.
In a preferred embodiment, an insulating adhesive tape is further disposed between the double-winding battery cell and the positive electrode casing and between the double-winding battery cell and the negative electrode casing for insulation.
In a preferred embodiment, the sealing gasket is provided with a directional explosion-proof tearing dotted line; the directional explosion-proof tear dotted line comprises a plurality of explosion-proof tear openings distributed along the axial direction.
In a more preferred embodiment, the directional anti-explosion tear-off line comprises more than two uniformly distributed lines along the circumferential direction of the sealing rubber ring.
In a preferred embodiment, the height-diameter ratio of the double-winding type button cell is less than or equal to 0.38.
In a more preferred embodiment, the aspect ratio of the double-winding button cell is 0.10-0.35.
Compared with the prior art, the utility model has the advantages of as follows and beneficial effect:
(1) the utility model discloses an among the two formula button cell that wind, electric core are two formula electric cores that wind, have higher charge-discharge efficiency for single formula electric core that winds, still can guarantee the higher charge-discharge efficiency of button cell under the requirement at the thinner high footpath ratio of button cell, more can satisfy button cell's user demand.
(2) In the double-winding type button battery, the negative electrode shell and the positive electrode shell are mutually buckled to form a shell of the whole button battery, the positive electrode shell is buckled with the edge, the negative electrode shell is provided with a buckling structure matched with the buckling edge, and when the internal pressure of the battery is overlarge, the positive electrode shell and the negative electrode shell can be separated from each other, so that the pressure relief function of the battery is realized, and the explosion-proof effect is achieved; meanwhile, a directional explosion-proof tearing dotted line is arranged on the sealing rubber ring, when the sealing rubber ring deforms and contracts due to the change of the internal or external temperature of the battery, the directional explosion-proof tearing dotted line tears to enable the negative electrode shell and the positive electrode shell to generate a gap, so that the temperature pressure relief function of the battery is realized, and the explosion-proof effect is achieved; so, realize the dual explosion-proof pressure release function of battery.
(3) The utility model discloses an among the two winding formula button cell, have the arch on the positive pole shell for positive ear is through less electric current and positive shell welding, increases solder joint density and improves welding tensile strength, avoids too big energy to cause the problem that positive shell is punctured, more is favorable to realizing the thinner preparation of battery, is favorable to guaranteeing this button cell's quality.
Drawings
Fig. 1 is a schematic view of the overall structure of a double-winding type button cell according to an embodiment of the present invention;
fig. 2 is a schematic view of an overall exploded structure of a double-winding type button cell according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a dual-winding button cell according to an embodiment of the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 3;
fig. 5a is an exploded schematic view of a double winding cell in a double winding button battery according to an embodiment of the present invention;
fig. 5b is an exploded front view schematically illustrating a double winding cell in the double winding type button battery according to the embodiment of the present invention;
fig. 6 is a schematic structural view of a sealing rubber ring in a double-winding type button battery according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a positive electrode case in a double-winding type button cell according to an embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating the welding of the positive casing and the positive tab;
the attached drawings are marked as follows: 1-positive electrode shell, 11-bulge, 12-edge buckle, 2-negative electrode shell, 21-indent, 3-double winding electric core, 31-positive electrode piece, 32-negative electrode piece, 33-isolation film, 34-positive electrode tab, 35-negative electrode tab, 4-sealing rubber ring, 41-directional explosion-proof tearing dotted line, 410-explosion-proof tearing opening and 5-insulating adhesive tape.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the following specific embodiments and accompanying drawings, but the scope of protection and the implementation of the present invention are not limited thereto. In the description of the specific embodiments, it should be noted that the terms "upper" and "lower" are used for distinguishing the orientations and positional relationships based on the orientations and positional relationships shown in the drawings or the orientations and positional relationships that the products of the present invention are usually placed when using, and are used only for distinguishing the description, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the structures or elements that are referred to must have specific orientations, be constructed in specific orientations, and operate, and therefore, cannot be understood as limiting the present invention, and are not meant to indicate or imply relative importance.
The utility model discloses a two winding formula button cell, it is concrete, this two winding formula button cell's height-diameter ratio is less than or equal to 0.38. In a preferred embodiment, the aspect ratio of the double-winding button cell is 0.10-0.35. In a specific embodiment, the height of the button cell is preferably 2-5.4 mm, and the diameter of the button cell is preferably 5.26-14.21 mm.
Referring to fig. 1 to 3, in a specific embodiment, the double-winding button battery includes a positive electrode case 1, a negative electrode case 2, and a double-winding battery cell 3. The positive electrode shell 1 and the negative electrode shell 2 are buckled with each other to form an outer shell of the whole button battery. And the double-winding battery cell 3 is arranged in a cavity body which is buckled with the positive electrode shell 1 and the negative electrode shell 2. And, the double winding cell 3 is electrically connected to the positive electrode can 1 and the negative electrode can 2.
In specific application, the positive electrode shell 1 and the negative electrode shell 2 are electrically connected with an electric electronic product or equipment, the electric energy is generated by the double-winding battery cell 3, and the electric electronic product or equipment is supplied with power through the electrically connected positive electrode shell 1 and the electrically connected negative electrode shell 2, so that the purpose of supplying power to the electric electronic product or equipment is achieved.
Referring to fig. 5a and 5b, in a preferred embodiment, the double-wound battery cell 3 is formed by winding a positive electrode sheet 31 and a negative electrode sheet 32 separated by a separation film 33; and the positive plate 31 and the negative plate 32 on the double-winding battery cell 3 are electrically connected with the positive shell 1 and the negative shell 2 through a positive tab 34 and a negative tab 35, respectively. Specifically, in the double-winding cell 3, the separator 33, the positive plate 31, the separator 33, and the negative plate 32 are sequentially included from the inner layer to the outer layer in the winding direction, and the four layers are stacked and then wound to form the cell; a positive tab 34 is connected to the leading end and the trailing end of the positive tab 31, and a negative tab 35 is connected to the leading end and the trailing end of the negative tab 32, respectively, thereby forming an integral double winding cell structure. The double-winding type battery cell is adopted, the phenomenon of pole piece breakage under the condition that the thickness of the button battery is thinned can be effectively avoided, higher charge-discharge efficiency is achieved compared with a single-winding type battery cell, the charge-discharge efficiency of the battery with the same specification is improved by 2-3 times under the condition that electrode materials are not replaced, the higher charge-discharge efficiency of the button battery can be still guaranteed under the requirement of the thinner height-diameter ratio of the button battery, and the application requirement of the button battery can be met.
Moreover, in a specific alternative embodiment, the material of the positive electrode sheet 31 is selected from a lithium cobaltate/lithium iron phosphate/lithium titanate ternary positive electrode material, the material of the negative electrode sheet 32 is selected from carbon/artificial graphite/silicon carbon, the material of the positive electrode tab 34 is selected from nickel or aluminum, the material of the negative electrode tab 35 is selected from nickel or copper, and the separation film 33 is selected from a polyethylene, polypropylene or polyolefin microporous film.
Specifically, referring to fig. 4, the positive electrode can 1 and the negative electrode can 2 are adaptive to each other and can be buckled or separated, and in a specific alternative embodiment, the material of the positive electrode can 1 and the negative electrode can 2 is selected from stainless steel, nickel-infiltrated iron or aluminum. In a preferred embodiment, the negative electrode can 2 is internally buckled into the positive electrode can 1; the edge of the opening end of the positive electrode shell 1 is provided with an inward-bent buckling edge 12; the negative electrode can 2 has a concave structure 21 adapted to the fastening edge 12. After the open end of the negative electrode shell 2 is buckled into the positive electrode shell 1 from top to bottom, the buckling edge 12 of the positive electrode shell 1 is just matched with the concave structure 21 of the negative electrode shell 2, and the negative electrode shell 2 is buckled, so that the positive electrode shell 1 and the negative electrode shell 2 form a stable buckling structure. Moreover, when the acting force of mutual disengagement of the positive electrode shell 1 and the negative electrode shell 2 is large enough, the buckling edge 12 and the concave structure 21 can be separated, so that the positive electrode shell 1 and the negative electrode shell 2 can be disengaged from each other, the pressure relief function of the battery is realized, and the explosion-proof effect is achieved.
In a specific preferred embodiment, the mutual buckling part between the positive electrode shell 1 and the negative electrode shell 2 is sealed and insulated by the sealing rubber ring 4. Specifically, in the lock structure of positive electrode shell 1 and negative electrode shell 2, one side of sealing rubber ring 4 and the fixed setting of the inner wall of positive electrode shell 1, and 2 lock contacts of negative electrode shell are at the opposite side of sealing rubber ring 4 to make positive electrode shell 1 and 2 stable lock relations that form of negative electrode shell, and seal isolated to positive electrode shell 1 and negative electrode shell 2. In a specific optional embodiment, the material of the sealing rubber ring 4 is one or more of PET (polyethylene terephthalate), PE (polyethylene), PP (polypropylene), ABS (acrylonitrile-styrene-butadiene copolymer), PVC (polyvinyl chloride), PTFE (polytetrafluoroethylene), and PA (polyamide).
In a preferred embodiment, the gap between the positive electrode can 1 and the sealing rubber ring 4 and the gap between the negative electrode can 2 and the sealing rubber ring 4 are filled with glue, so that the whole battery forms a sealed structure to prevent liquid leakage.
Moreover, the double-winding battery cell 3 and the positive electrode shell 1 and the negative electrode shell 2 are also provided with insulating gummed paper 5 for insulation and isolation, so that the electric leakage phenomenon is avoided. Wherein, be provided with the lower insulated gummed paper that is used for completely cutting off two positive terminals of coiling electricity core 3 and positive shell 1 between two positive terminals of coiling electricity core 3 and positive shell 1, be provided with the last insulated gummed paper that is used for completely cutting off two negative pole end and negative pole shell 2 of coiling electricity core 3 between two negative pole ends of coiling electricity core 3 and negative pole shell 2 to and be used for completely cutting off two sides of coiling electricity core 3 and detain the side insulated gummed paper of 2 parts of negative pole shell to positive shell 1 in, and two positive terminals and the negative pole end of coiling electricity core 3 then keep respectively with the normal electricity of positive shell 1 and negative pole shell 2 to be connected. Moreover, in a particular embodiment, the insulating gummed paper 5 is used in a material selected from PI (polyimide), PE or PET.
Referring to fig. 6, in the preferred embodiment, the sealing rubber ring 4 is provided with a directional bursting tear-proof dotted line 41. Wherein, the directional anti-explosion tear line 41 comprises a plurality of anti-explosion tear openings 410 distributed along the axial direction, that is, the directional anti-explosion tear line 41 is formed by a plurality of anti-explosion tear openings 410 distributed along the axial direction. So, when inside or outside temperature variation messenger sealing rubber ring 4 takes place to warp the shrink when the battery, directional explosion-proof tear dotted line 41 will tear to make negative pole shell 2 and positive pole shell 1 produce the gap, realize the temperature pressure release function of battery, further play explosion-proof effect. Also, in a specific embodiment, the explosion-proof tear 410 of the directional explosion-proof tear line 41 is filled with a sealing glue to insulate the positive electrode can 1 from the negative electrode can 2.
In a specific embodiment, along the circumferential direction of the rubber sealing ring 4, the directional anti-explosion tear lines 41 include more than two lines distributed uniformly, so as to sufficiently ensure the anti-explosion effect of the rubber sealing ring 4. In a preferred embodiment, the directional bursting tear line 41 comprises three evenly distributed strips.
As shown in fig. 7, an inward convex protrusion 11 is provided on the inner bottom surface of the positive electrode can 1; the projection 11 is welded with the positive tab 34, so that the positive tab 34 is electrically connected with the positive shell 1. In a specific embodiment, the number of the protrusions 11 is two or more, and preferably, the number of the protrusions 11 on the positive electrode can 1 is four. Referring to fig. 8, in the assembly process of the thin button cell, when the positive tab 34 is welded with the positive shell 1, the positive tab 34 can be welded with the protrusion 11 to achieve the purpose of welding with the positive shell 1, and the positive tab 34 can be welded with the protrusion 11 by adopting a small current, so that the welding spot density is increased, the welding tensile strength is improved, the problem that the positive shell 1 is punctured due to excessive energy is avoided, the thinner manufacture of the button cell is more facilitated, and the quality of the button cell is ensured.
The above embodiments are merely preferred embodiments of the present invention, and only lie in further detailed description of the technical solutions of the present invention, but the protection scope and the implementation manner of the present invention are not limited thereto, and any changes, combinations, deletions, replacements, or modifications that do not depart from the spirit and principles of the present invention will be included in the protection scope of the present invention.
Claims (9)
1. A double-winding type button battery is characterized by comprising a positive electrode shell, a negative electrode shell and a double-winding battery core; the positive electrode shell and the negative electrode shell are buckled with each other and are sealed, insulated and isolated by a sealing rubber ring; the double-winding battery cell is arranged in a cavity body formed by buckling the positive electrode shell and the negative electrode shell;
the double-winding battery cell is formed by winding a positive plate and a negative plate which are isolated by an isolating film; and the positive plate and the negative plate on the double-winding battery cell are respectively electrically connected with the positive shell and the negative shell through the positive lug and the negative lug.
2. The double-winding button cell according to claim 1, wherein the inner bottom surface of the positive casing has an inward-protruding protrusion; the bulge is welded with the positive lug.
3. The double-wound button cell according to claim 2, wherein the protrusions are two or more independent of each other.
4. The double-wound button cell of claim 1, wherein the negative casing is internally threaded into the positive casing; the edge of the opening end of the positive electrode shell is provided with an inward-bent buckling edge; the negative electrode shell is provided with an inward concave structure matched with the buckling edge.
5. The double-winding button battery according to claim 1, wherein an insulating adhesive tape is further disposed between the double-winding battery core and the positive casing and between the double-winding battery core and the negative casing for insulation.
6. The double-wound button cell as claimed in claim 1, wherein the sealing gasket has a directional burst-proof tear-line; the directional explosion-proof tear dotted line comprises a plurality of explosion-proof tear openings distributed along the axial direction.
7. The double-wound button cell according to claim 6, wherein the directional bursting-preventing tear-line comprises two or more lines uniformly distributed along the circumferential direction of the sealing rubber ring.
8. The double-winding button cell according to any one of claims 1 to 7, wherein the aspect ratio of the double-winding button cell is less than or equal to 0.38.
9. The button cell of any one of claims 1 to 7, wherein the aspect ratio of the button cell is 0.10 to 0.35.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020169566.8U CN211350856U (en) | 2020-02-14 | 2020-02-14 | Double-winding type button battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020169566.8U CN211350856U (en) | 2020-02-14 | 2020-02-14 | Double-winding type button battery |
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| Publication Number | Publication Date |
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| CN211350856U true CN211350856U (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020169566.8U Active CN211350856U (en) | 2020-02-14 | 2020-02-14 | Double-winding type button battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113690480A (en) * | 2021-08-24 | 2021-11-23 | 珠海冠宇电池股份有限公司 | Battery with a battery cell |
| CN115425341A (en) * | 2022-09-30 | 2022-12-02 | 路华置富电子(东莞)有限公司 | Winding type button battery with ruffle structure |
-
2020
- 2020-02-14 CN CN202020169566.8U patent/CN211350856U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113690480A (en) * | 2021-08-24 | 2021-11-23 | 珠海冠宇电池股份有限公司 | Battery with a battery cell |
| CN115425341A (en) * | 2022-09-30 | 2022-12-02 | 路华置富电子(东莞)有限公司 | Winding type button battery with ruffle structure |
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