WO2021218868A1 - 纽扣电池 - Google Patents
纽扣电池 Download PDFInfo
- Publication number
- WO2021218868A1 WO2021218868A1 PCT/CN2021/089688 CN2021089688W WO2021218868A1 WO 2021218868 A1 WO2021218868 A1 WO 2021218868A1 CN 2021089688 W CN2021089688 W CN 2021089688W WO 2021218868 A1 WO2021218868 A1 WO 2021218868A1
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- WO
- WIPO (PCT)
- Prior art keywords
- electrode layer
- battery
- winding core
- electrode
- tab
- Prior art date
Links
- 238000004804 winding Methods 0.000 claims abstract description 78
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 239000003792 electrolyte Substances 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims description 24
- 238000007599 discharging Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Images
Classifications
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
- H01M10/0427—Button cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0481—Compression means other than compression means for stacks of electrodes and separators
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- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
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- 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
- H01M50/147—Lids or covers
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- 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
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/153—Lids or covers characterised by their shape for button or coin cells
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- 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
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
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- 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
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- 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
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- H—ELECTRICITY
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- 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
- H01M50/186—Sealing members characterised by the disposition of the sealing members
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- H—ELECTRICITY
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- 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
- H01M50/50—Current conducting connections for cells or batteries
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- H—ELECTRICITY
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/545—Terminals formed by the casing of the cells
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- H—ELECTRICITY
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/564—Terminals characterised by their manufacturing process
- H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
- H01M50/56—Cup shaped terminals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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
Definitions
- the invention relates to the technical field of button batteries, in particular to a button battery.
- the traditional button-type pole unit unit includes a shell, pole group, electrolyte, etc., of which the pole group also has a laminated type and a winding type.
- the current coiled button battery currently has poor conduction, resulting in increased internal resistance and unstable energy of the battery cell.
- the button battery can increase the contact area, which is beneficial to improve the charging and discharging performance and the stability of the battery operation.
- the present application provides a button battery, including an electrode group unit, the electrode group unit includes a first winding core, a first tab, and a first current collector, and the first winding core includes a first electrode layer, a second electrode layer, And a first diaphragm sandwiched between the adjacent first electrode layer and the second electrode layer, the first electrode layer and the second electrode layer have opposite properties;
- the button battery also includes a battery casing, a battery cover, and an insulating sealing ring
- the battery case forms a sealed cavity with the battery cover through the sealing ring, the electrolyte is stored in the sealed cavity, the electrode group unit is arranged in the sealed cavity, and the first electrode layer is electrically connected to the battery cover through the first tab, and the second electrode layer
- the first current collector is electrically connected to the battery case.
- the button battery can be flexibly designed according to the internal space requirements of the electronic device. Specifically, according to the shape characteristics of the button battery, the shape of the sealed cavity is designed, and then the first winding core is used to form the required electrode group shape.
- the first electrode layer is electrically connected to the battery cover through the first tab, and the second electrode layer passes through
- the first current collector is electrically connected to the battery casing, and the first tab is used to form an electrode, and the first current collector is used for finishing to form another electrode, which can increase the contact area and thereby help reduce the internal resistance of the battery cell.
- the button battery can increase the contact area, which is beneficial to reduce the internal resistance of the battery cell, improve the charging and discharging performance, and improve the stability of the battery operation.
- the pole group unit further includes a second winding core, the second winding core cooperates with the first winding core to form a predetermined shape, and the second winding core includes a third electrode with the same properties as the first electrode layer.
- the first winding core and the second winding core are used to cooperate to form a preset shape (that is, the required electrode group shape can be flexibly set according to the shape of the button battery), and the first electrode layer and the second electrode layer are electrically connected through the first electrode lug.
- the first current collector is electrically connected to the second electrode layer and the fourth electrode layer, so that the first winding core and the second winding core are relatively independent and work in parallel, which can reduce the internal resistance.
- the pole group unit has lower internal resistance; compared with the laminated pole group, the pole group construction can be completed by combining the first winding core and the second winding core only. , The assembly process is simple.
- the button battery adopts the above-mentioned pole group unit, and uses a relatively independent winding core to complete the construction of the pole group.
- the winding core will not expand along its axial direction and will not damage the sealing structure, making the sealing of the sealed cavity reliable and not easy to leak;
- using the first winding core and the second winding core to work in parallel is beneficial to improve the charge and discharge rate performance and meet the requirements of electronic products for fast charging.
- the pole group unit further includes a third winding core, the third winding core cooperates with the first winding core and the second winding core to form a predetermined shape, and the third winding core includes the properties of the first electrode layer.
- the pole group unit further includes an insulating fixing member, and the fixing member is fixedly connected to the first winding core and the second winding core, respectively.
- the electrode group unit further includes a second current collector, and the first electrode layer is electrically connected to the first electrode through the second current collector.
- the first tab includes a connecting body, a welding body, and an elastic sheet structure arranged between the connecting body and the welding body.
- the connecting body is electrically connected to the first electrode layer, and the welding body is welded and fixed to the battery cover.
- the button battery further includes a first insulating pad and a second insulating pad.
- the first insulating pad is disposed between the electrode group unit and the battery cover, and the second insulating pad is disposed on the bottom of the electrode group unit and the battery casing. Between the walls.
- the pole group unit further includes a second tab, the second tab is electrically connected to the first current collector, and the second tab is disposed between the second insulating pad and the battery case, and is connected to the battery case
- the bottom wall is welded and fixed.
- the battery housing is provided with a receiving cavity
- the battery housing includes an annular receiving body and an extruded body arranged on the receiving body
- the receiving body is sleeved on the outside of the receiving cavity and arranged at the port of the receiving cavity
- the battery cover is arranged between the receiving body and the extruding body through a sealing ring
- the extruding body is matched with the receiving body for clamping the battery cover and the sealing ring.
- the sealing ring is disposed between the receiving body and the extruded body, and forms a groove for wrapping the battery cover.
- Figure 1 is a half-sectional schematic diagram of a button battery in an embodiment
- Fig. 2 is a schematic diagram of the first winding core shown in Fig. 1;
- Fig. 3 is a schematic diagram of a pole group unit in an embodiment
- FIG. 4 is a schematic diagram of a half-section of a button battery in an embodiment
- FIG. 5 is a schematic top view of the button battery shown in FIG. 4;
- FIG. 6 is a partial enlarged schematic diagram of A shown in FIG. 4;
- Fig. 7 is a partial enlarged schematic diagram of B shown in Fig. 4.
- Pole group unit 110, first winding core; 112, first electrode layer; 114, second electrode layer; 116, first diaphragm; 120, first tab; 122, connecting body; 124, welding body; 126. Shrapnel structure; 130. First current collector; 140. Second winding core; 142. Third electrode layer; 144. Fourth electrode layer; 146. Second diaphragm; 150. Second tab; 200.
- Battery case 210 containing cavity; 220, receiving body; 230, extruded body; 300, battery cover; 400, sealing ring; 410, groove; 500, first insulating pad; 600, second insulating pad.
- a button battery which includes a pole assembly unit 100.
- the pole assembly unit 100 includes a first winding core 110, a first tab 120, and a first current collector 130.
- a winding core 110 includes a first electrode layer 112, a second electrode layer 114, and a first diaphragm 116 sandwiched between the adjacent first electrode layer 112 and the second electrode layer 114.
- the first electrode layer 112 and the second electrode layer 114 The properties of the two electrode layers 114 are opposite;
- the button battery also includes a battery case 200, a battery cover 300, and an insulating sealing ring 400.
- the battery case 200 forms a sealed cavity with the battery cover 300 through the sealing ring 400.
- the sealed cavity contains electrolyte
- the assembly unit 100 is disposed in the sealed cavity
- the first electrode layer 112 is electrically connected to the battery cover 300 through the first tab 120
- the second electrode layer 114 is electrically connected to the battery case 200 through the first current collector 130.
- the button battery can be flexibly designed according to the internal space requirements of the electronic device. Specifically, according to the shape and characteristics of the button battery, the shape of the sealed cavity is designed, and then the first winding core 110 is used to form the desired electrode group shape.
- the first electrode layer 112 is electrically connected to the battery cover 300 through the first lug 120.
- the second electrode layer 114 is electrically connected to the battery case 200 through the first current collector 130, and then the first tab 120 is used to form an electrode, and the first current collector 130 is used for finishing to form another electrode, which increases the contact area and helps reduce the battery cell. Internal resistance.
- the button battery can increase the contact area, which is beneficial to improve the charging and discharging performance and the stability of the battery operation.
- the properties of the first electrode layer 112 and the second electrode layer 114 are opposite means that when the first electrode layer 112 is a positive electrode layer, the second electrode layer 114 is a negative electrode layer; or the first electrode layer 112 is a negative electrode. When layered, the second electrode layer 114 is a positive electrode layer.
- the properties of the first electrode layer 112 and the third electrode layer 142 are the same means that they are both the positive electrode layer or the negative electrode layer.
- first current collector 130 is a metal foil, including but not limited to copper foil, aluminum foil, and the like.
- pole group unit 100 in the present application is an abbreviation for a combination with a function of a pole group.
- the sealing ring 400 may be a shaped sealing element, or may be formed by coating with a sealant, and the specific implementation process will not be repeated here.
- the welding and fixing methods of the first tab 120 and the battery cover 300, and the first current collector 130 and the battery casing 200 include resistance welding, ultrasonic welding, and laser welding.
- the welding shapes formed by ultrasonic welding are single-point, multi-point (more than 2 points), triangle, rectangular, and round; welding spots formed by laser welding include single point, two points, three points, four points and more Point, straight line, cross shape, etc.; welding shapes formed by resistance welding include circle, triangle, rectangle, etc.
- the structure assembly process of the laminated pole group is very complicated, and the expansion of the pole group in the thickness direction will affect the reliability of the sealing, and it is easy to cause liquid leakage; while the traditional winding pole group will affect the internal structure defects. Improved charging and discharging rate performance.
- a pole group unit 100 that is different from the prior art is provided. Compared with the traditional wound pole group, the internal resistance is smaller; and compared with the laminated pole group, the assembly process simple.
- the pole group unit 100 further includes a second winding core 140.
- the second winding core 140 cooperates with the first winding core 110 to form a predetermined shape, and the second winding core 140 includes the second winding core 140 and the second winding core 140.
- the third electrode layer 142 with the same properties as the one electrode layer 112, the fourth electrode layer 144 with the same properties as the second electrode, and the second electrode layer 142 sandwiched between the adjacent third electrode layer 142 and the fourth electrode layer 144 Separator 146; the first electrode layer 112 and the third electrode layer 142 are electrically connected to the battery cover 300 through the first tab 120, the second electrode layer 114 and the fourth electrode layer 144 are both through the first current collector 130 and the battery housing 200 Electric connection.
- the first winding core 110 and the second winding core 140 are used to cooperate to form a preset shape (that is, the required electrode group shape can be flexibly set according to the shape of the button battery), and the first electrode is electrically connected through the first tab 120 Layer 112 and the second winding core 140, the first current collector 130 is electrically connected to the second electrode layer 114 and the fourth electrode layer 144, so that the first winding core 110 and the second winding core 140 are relatively independent and work in parallel, which can reduce the internal Hinder.
- the pole assembly unit 100 has a smaller internal resistance compared with the traditional wound pole assembly; and compared with the laminated pole assembly, it can be completed by only combining the first winding core 110 and the second winding core 140
- the pole group is constructed and the assembly process is simple.
- the button battery adopts the above-mentioned pole group unit 100, and uses a relatively independent winding core to complete the construction of the pole group.
- the winding core will not expand along its axial direction and will not damage the sealing structure, making the sealing of the sealed cavity reliable and difficult. Liquid leakage; at the same time, the use of the first winding core 110 and the second winding core 140 to work in parallel is beneficial to improve the charge and discharge rate performance and meet the requirements of electronic products for fast charging.
- first reel core 110 and the "second reel core 140" include but are not limited to semicircular, polygonal, or semi-elliptical shapes; correspondingly, the cross-section of the pole group unit 100 includes But it is not limited to circular, polygonal or elliptical shapes.
- a winding needle is used in the preparation process of the "first winding core 110" and the “second winding core 140", and the cross-sectional shape of the winding needle includes, but is not limited to, semicircular, polygonal, and semi-elliptical.
- the aforementioned polygons include, but are not limited to, triangles, quadrilaterals, pentagons, and so on.
- the pole group unit 100 further includes a third winding core (not shown), and the third winding core is matched with the first winding core 110 and the second winding core 140 Formed into a preset shape, the third winding core includes a fifth electrode layer (not shown) having the same properties as the first electrode layer 112, a sixth electrode layer (not shown) having the same properties as the second electrode, and intervening A third diaphragm (not shown) between the adjacent fifth electrode layer and the sixth electrode layer; the first electrode layer 112, the third electrode layer 142, and the third electrode layer 142 all pass through the first tab 120 and
- the battery cover 300 is electrically connected, and the second electrode layer 114, the fourth electrode layer 144, and the sixth electrode layer are all electrically connected to the battery case 200 through the first current collector 130.
- the pole group unit 100 can also use the third winding core to cooperate with the first winding core 110 and the second winding core 140 to obtain more shapes.
- the third winding core is further connected in parallel, which is beneficial to further reduce the pole group unit 100.
- the internal resistance is beneficial to further reduce the pole group unit 100.
- the pole group unit further includes a second current collector (not shown), and the first electrode layer 112 is electrically connected to the first tab 120 through the second current collector.
- the first electrode layer 112 can also be finished with a second current collector, and then the first tab 120 is welded to the battery cover 300.
- the first tab 120 has elasticity.
- the first tab 120 with elasticity facilitates elastic contact with the battery cover 300, so that the first tab 120 and the battery cover 300 elastically abut, and then the first tab 120 and the battery cover 300 are reliably in contact with each other for welding. At this time, it is helpful to increase the contact area.
- the first tab 120 includes a connecting body 122, a welding body 124, and an elastic sheet structure 126 disposed between the connecting body 122 and the welding body 124.
- the connecting body 122 is electrically connected to the first electrode layer 112, and the welding body 124 is welded and fixed to the battery cover 300.
- the elastic sheet structure 126 formed by bending the first tab 120 can elastically abut the battery cover 300, and the first tab 120 can contact the battery cover 300 reliably, which is beneficial to increase the contact area during welding.
- the button battery further includes a first insulating pad 500 and a second insulating pad 600, and the first insulating pad 500 is disposed in the pole group unit Between 100 and the battery cover 300, the second insulating pad 600 is disposed between the electrode assembly unit 100 and the bottom wall of the battery housing 200.
- the use of the first insulation pad 500 and the second insulation pad 600 enables the pole group unit 100 to be reliably disposed in the sealed cavity to avoid short circuit; at the same time, the use of the first insulation pad 500 and the second insulation pad 600 facilitates the assembly of the pole group
- the unit 100 is elastically squeezed and fixed between the battery housing 200 and the battery cover 300, so that the electrode assembly unit 100 can be fixed more firmly.
- the pole set unit 100 further includes a second tab 150, the second tab 150 is electrically connected to the first current collector 130, and the second tab 150 is provided Between the second insulating pad 600 and the battery case 200, and welded and fixed to the bottom wall of the battery case 200.
- the first current collector 130 can be insulated from the end surface of the electrode assembly unit 100 by using the second insulating pad 600, and the pressure generated by the battery cover 300, the electrode assembly unit 100, etc. can be used to make the second electrode tab 150 and the bottom of the battery housing 200
- the wall is close to the wall, which is convenient for welding and fixing, which is beneficial to improve the welding quality.
- the first current collector 130 is in close contact with the battery case 200 to form conduction, and at the same time, it is beneficial to weld and fix the second tab 150 and the battery case 200 to form a double conduction structure, so that the second electrode layer 114 is connected to the battery case 200.
- the conduction is more reliable.
- the battery housing 200 is provided with a receiving cavity 210, and the battery housing 200 includes a ring-shaped receiving body 220 and is arranged on the receiving body 220
- the squeezing body 230, the receiving body 220 is sleeved on the outside of the accommodating cavity 210, and is arranged at the port of the accommodating cavity 210
- the battery cover 300 is arranged between the receiving body 220 and the squeezing body 230 through the sealing ring 400, and the squeezing
- the body 230 cooperates with the receiving body 220 for clamping the battery cover 300 and the sealing ring 400.
- a receiving body 220 and an extruded body 230 for bending can be formed at the port of the shell, and then the shaped sealing ring 400 is placed on the receiving body 220, or the sealant is applied A sealing ring 400 is formed on the receiving body 220, and then the battery cover 300 is set on the sealing ring 400. At this time, the battery cover 300 can be press-fixed on the receiving body 220 only by forming the extruded body 230 by using the bendable part.
- the sealing ring 400 is used to seal the accommodating cavity 210 with the battery cover 300, so that the button battery material can be sealed and stored in the sealed cavity.
- the sealing structure of the shell is arranged at the port of the sealed cavity, which simplifies the related procedures.
- the sealing ring 400 does not need to extend into the containing cavity 210 to fit the side wall of the sealed cavity, occupying the space of the sealed cavity, which is beneficial to make full use of the sealed cavity to store the electrode group unit 100 and the electrolyte, so that Under the same conditions, more button battery materials can be sealed, which is conducive to improving the performance of the button battery.
- the sealing ring 400 is disposed between the receiving body 220 and the extruding body 230, and a groove 410 for wrapping the battery cover 300 is formed.
- a groove 410 for wrapping the battery cover 300 Use the groove 410 to wrap the battery cover 300, use the receiving body 220 to form a first sealed contact with the battery cover 300, and then use the extruded body 230 to form a second sealed contact with the battery cover 300 to further improve the battery housing 200 and the battery cover 300.
- the seal is reliable. Compared with the prior art, this method can greatly improve the sealability of the button battery, making the button battery more reliable.
- the battery cover 300 is arranged against the bottom wall of the groove 410.
- the side surface of the battery cover 300 and the bottom wall of the groove 410 are further used to form a third seal, which further improves the sealing effect between the battery housing 200 and the battery cover 300, so that the battery cover 300 is wrapped by the sealing ring 400 and is covered by the receiving body 220
- the extruded body 230 is pressed together to form a dense sealing structure between the battery casing 200 and the battery cover 300.
- first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include at least one of the features. In the description of the present invention, “plurality” means at least two, such as two, three, etc., unless otherwise specifically defined.
- the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. , Or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, it can be the internal connection of two components or the interaction relationship between two components, unless otherwise specified The limit.
- installed can be a fixed connection or a detachable connection. , Or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, it can be the internal connection of two components or the interaction relationship between two components, unless otherwise specified The limit.
- the specific meanings of the above-mentioned terms in the present invention can be understood according to specific situations.
- the first feature “on” or “under” the second feature may be in direct contact with the first and second features, or the first and second features may be indirectly through an intermediary. touch.
- the "above”, “above” and “above” of the first feature on the second feature may mean that the first feature is directly above or diagonally above the second feature, or it simply means that the level of the first feature is higher than the second feature.
- the “below”, “below” and “below” of the second feature of the first feature may be that the first feature is directly below or obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.
- an element when an element is referred to as being “fixed to”, “installed on”, “fixed on” or “installed on” another element, it can be directly on the other element or there may also be a centered element. .
- an element When an element is considered to be “connected” to another element, it can be directly connected to the other element or an intermediate element may be present at the same time.
- one element when one element is considered to be a "fixed transmission connection” and another element, the two can be fixed in a detachable connection or non-detachable connection, and only need to be able to achieve power transmission, such as socket connection and snap connection. , One-piece molding, fixing, welding, etc., which can be realized in the prior art, so it will not be redundant here.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
Description
Claims (10)
- 一种纽扣电池,其特征在于,包括:极组单元,所述极组单元包括第一卷芯、第一极耳及第一集流体,所述第一卷芯包括第一电极层、第二电极层、以及夹设于相邻的所述第一电极层与所述第二电极层之间的第一隔膜,所述第一电极层与所述第二电极层的性质相反;所述纽扣电池还包括电池外壳、电池盖及绝缘的密封圈,所述电池外壳通过所述密封圈与所述电池盖形成密封腔,所述密封腔内存储有电解液,所述极组单元设置于所述密封腔内,且所述第一电极层通过所述第一极耳与所述电池盖电连接,所述第二电极层通过所述第一集流体与所述电池外壳电连接。
- 根据权利要求1所述的纽扣电池,其特征在于,所述极组单元还包括第二卷芯,所述第二卷芯与所述第一卷芯相配合形成预设形状,所述第二卷芯包括与所述第一电极层的性质相同的第三电极层、与所述第二电极性质相同的第四电极层、以及夹设于相邻的所述第三电极层与所述第四电极层之间的第二隔膜;所述第一电极层与所述第三电极层均通过所述第一极耳与所述电池盖电连接,所述第二电极层与所述第四电极层均通过所述第一集流体与所述电池外壳电连接。
- 根据权利要求2所述的纽扣电池,其特征在于,所述极组单元还包括第三卷芯,所述第三卷芯与所述第一卷芯及所述第二卷芯相配合形成预设形状,所述第三卷芯包括与所述第一电极层的性质相同的第五电极层、与所述第二电极性质相同的第六电极层、以及夹设于相邻的所述第五电极层与所述第六电极层之间的第三隔膜;所述第一电极层、所述第三电极层及所述第三电极层均通过所述第一极耳与所述电池盖电连接,所述第二电极层、所述第四电极层及第六电极层均通过所述第一集流体与所述电池外壳电连接。
- 根据权利要求2所述的纽扣电池,其特征在于,所述极组单元还包括绝缘的固定件,所述固定件分别与所述第一卷芯及所述第二卷芯固定连接。
- 根据权利要求1所述的纽扣电池,其特征在于,所述极组单元还包括第二集流体,所述第一电极层通过所述第二集流体与所述第一极耳电连接。
- 根据权利要求1所述的纽扣电池,其特征在于,所述第一极耳包括所述连接体、焊接体、以及设置于所述连接体与所述焊接体之间的弹片结构,所述 连接体与所述第一电极层电连接,所述焊接体与所述电池盖焊接固定。
- 根据权利要求1所述的纽扣电池,其特征在于,所述纽扣电池还包括第一绝缘垫及第二绝缘垫,所述第一绝缘垫设置于所述极组单元与所述电池盖之间,所述第二绝缘垫设置于所述极组单元与所述电池外壳的底壁之间。
- 根据权利要求7所述的纽扣电池,其特征在于,所述极组单元还包括第二极耳,所述第二极耳与所述第一集流体电连接,且所述第二极耳设置于所述第二绝缘垫及所述电池外壳之间,并与所述电池外壳的底壁焊接固定。
- 根据权利要求1至8任一项所述的纽扣电池,其特征在于,所述电池外壳设有容纳腔,所述电池外壳包括环形的承接体、以及设置于所述承接体上的挤压体,所述承接体套设于所述容纳腔的外侧、并设置于所述容纳腔的端口处,所述电池盖通过所述密封圈设置于所述承接体与所述挤压体之间,所述挤压体与所述承接体相配合,用于夹固所述电池盖及所述密封圈。
- 根据权利要求9所述的纽扣电池,其特征在于,所述密封圈设置于所述承接体与所述挤压体之间,并形成用于包裹所述电池盖的凹槽。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21796139.0A EP4145596A1 (en) | 2020-04-30 | 2021-04-25 | Button battery |
US17/922,274 US20230163432A1 (en) | 2020-04-30 | 2021-04-25 | Button battery |
JP2022566496A JP7515917B2 (ja) | 2020-04-30 | 2021-04-25 | ボタン電池 |
KR1020227041710A KR20230006881A (ko) | 2020-04-30 | 2021-04-25 | 버튼형 배터리 |
Applications Claiming Priority (2)
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CN202010367316.XA CN111509148A (zh) | 2020-04-30 | 2020-04-30 | 纽扣电池 |
CN202010367316.X | 2020-04-30 |
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WO2021218868A1 true WO2021218868A1 (zh) | 2021-11-04 |
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PCT/CN2021/089688 WO2021218868A1 (zh) | 2020-04-30 | 2021-04-25 | 纽扣电池 |
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US (1) | US20230163432A1 (zh) |
EP (1) | EP4145596A1 (zh) |
JP (1) | JP7515917B2 (zh) |
KR (1) | KR20230006881A (zh) |
CN (1) | CN111509148A (zh) |
WO (1) | WO2021218868A1 (zh) |
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CN111509148A (zh) * | 2020-04-30 | 2020-08-07 | 深圳市合壹新能技术有限公司 | 纽扣电池 |
KR20220036808A (ko) | 2020-09-16 | 2022-03-23 | 주식회사 엘지에너지솔루션 | 버튼형 이차전지 |
CN116097518A (zh) * | 2020-09-24 | 2023-05-09 | 株式会社Lg新能源 | 纽扣型二次电池及其组装装置 |
CN112366420B (zh) * | 2020-11-09 | 2022-09-06 | 深圳市合壹新能技术有限公司 | 电池壳体结构及纽扣电池 |
CN112687832B (zh) * | 2020-12-24 | 2022-05-17 | 宁德新能源科技有限公司 | 电芯与用电装置 |
CN112886048B (zh) * | 2021-02-07 | 2022-11-18 | 惠州市德能电池有限公司 | 纽扣电池及其制备方法 |
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2021
- 2021-04-25 JP JP2022566496A patent/JP7515917B2/ja active Active
- 2021-04-25 WO PCT/CN2021/089688 patent/WO2021218868A1/zh active Application Filing
- 2021-04-25 US US17/922,274 patent/US20230163432A1/en active Pending
- 2021-04-25 KR KR1020227041710A patent/KR20230006881A/ko unknown
- 2021-04-25 EP EP21796139.0A patent/EP4145596A1/en active Pending
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KR20230006881A (ko) | 2023-01-11 |
CN111509148A (zh) | 2020-08-07 |
US20230163432A1 (en) | 2023-05-25 |
EP4145596A1 (en) | 2023-03-08 |
JP2023525690A (ja) | 2023-06-19 |
JP7515917B2 (ja) | 2024-07-16 |
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