WO2020057127A1 - 纽扣电池 - Google Patents

纽扣电池 Download PDF

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Publication number
WO2020057127A1
WO2020057127A1 PCT/CN2019/084413 CN2019084413W WO2020057127A1 WO 2020057127 A1 WO2020057127 A1 WO 2020057127A1 CN 2019084413 W CN2019084413 W CN 2019084413W WO 2020057127 A1 WO2020057127 A1 WO 2020057127A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover
pole piece
battery according
peripheral wall
positioning ring
Prior art date
Application number
PCT/CN2019/084413
Other languages
English (en)
French (fr)
Inventor
刘秦
Original Assignee
深圳市秸川材料科技有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN201821540591.1U external-priority patent/CN209029467U/zh
Priority claimed from CN201811117556.3A external-priority patent/CN109065823A/zh
Priority claimed from CN201822041441.2U external-priority patent/CN209232864U/zh
Priority claimed from CN201920425004.2U external-priority patent/CN209729970U/zh
Application filed by 深圳市秸川材料科技有限公司 filed Critical 深圳市秸川材料科技有限公司
Publication of WO2020057127A1 publication Critical patent/WO2020057127A1/zh

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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
    • 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
    • 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
    • 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
    • H01M50/593—Spacers; Insulating plates
    • 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

Definitions

  • the invention relates to the technical field of batteries, in particular to a button battery.
  • batteries are required to be more miniaturized. While maintaining a high life, the battery is required to have the highest volume specific energy and mass specific energy.
  • the negative cover needs to be turned over first, then the plastic ring and the negative cover are assembled together, and finally the negative cover and the plastic ring are pressed into the positive case. Because the negative electrode cover has a flange, in order to make the connection between the negative electrode cover and the positive electrode case better after assembly, the thickness of the plastic ring is thicker, which increases the cost of materials.
  • a button battery capable of making the connection strength of the negative electrode cover and the positive electrode case stronger and reducing the thickness of the plastic ring is provided.
  • a button battery includes:
  • a battery cup including a cup bottom wall and a cup peripheral wall provided on an outer periphery of the cup bottom wall;
  • a battery cover includes a cover bottom wall and a cover peripheral wall provided on an outer periphery of the cover bottom wall. An end of the cover peripheral wall remote from the cover bottom wall is folded toward the outer periphery and extends toward the cover bottom wall to form a hook portion. The cover peripheral wall is inserted into the cup peripheral wall, and the cover peripheral wall and the cup peripheral wall at least partially overlap;
  • An insulating sealing ring is provided between the cover peripheral wall and the cup peripheral wall, and electrically isolates the battery cup from the battery cover;
  • An electric cell is disposed in an accommodating cavity surrounded by the battery cup, the battery cover and the insulating sealing ring, and the electric cell is electrically connected to the battery cup and the battery cover, respectively.
  • FIG. 1 is a schematic structural diagram of a coin battery provided in Embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of a matching structure of a battery cover and an insulating sealing ring in the coin cell shown in FIG. 1;
  • FIG. 2 is a schematic diagram of a matching structure of a battery cover and an insulating sealing ring in the coin cell shown in FIG. 1;
  • FIG. 3 is a schematic structural diagram of a coin battery provided in Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of an embodiment of a battery cell in the coin cell shown in FIG. 3;
  • FIG. 5 is a schematic structural diagram of another embodiment of a battery cell in the coin cell shown in FIG. 3;
  • FIG. 6 is a schematic structural diagram of an embodiment of a first output conductor in the coin cell shown in FIG. 1;
  • FIG. 7 is a schematic structural diagram of an embodiment of a second output conductor in the coin cell shown in FIG. 1;
  • FIG. 8 is a schematic structural diagram of a coin battery provided in Embodiment 3 of the present invention.
  • FIG. 9 is a schematic structural diagram of a first positioning ring in the button battery shown in FIG. 8 according to the first embodiment
  • FIG. 10 is a schematic structural diagram of a first positioning ring and a second output conductor arrangement manner 1 in the coin cell shown in FIG. 8;
  • FIG. 11 is a schematic structural diagram of a second positioning ring and a second output conductor arrangement manner 2 in the button battery shown in FIG. 8.
  • a coin cell battery 1 includes a battery cup 11, a battery cover 12, an insulating seal ring 13, and a battery cell 14.
  • the battery cup 11 includes a cup bottom wall 111 and a cup peripheral wall 112, and the cup peripheral wall 112 is disposed on the outer periphery of the cup bottom wall 111.
  • the battery cover 12 includes a cover bottom wall 121 and a cover peripheral wall 122.
  • the cover peripheral wall 122 is disposed on an outer periphery of the cover bottom wall 121.
  • the cover peripheral wall 122 includes a first circumferential inner wall 1221.
  • the end portion of the cover peripheral wall 122 which is far from the cover bottom wall 121 is folded toward the outer periphery and extends toward the cover bottom wall 121 to form a hook portion 15.
  • the lid peripheral wall 122 is inserted into the cup peripheral wall 112, and the lid peripheral wall 122 and the cup peripheral wall 112 at least partially overlap.
  • the insulating sealing ring 13 is provided between the cover peripheral wall 122 and the cup peripheral wall 112, and electrically isolates the battery cup 11 from the battery cover 12.
  • the battery cup 11, the battery cover 12 and the insulating sealing ring 13 surround an accommodation cavity 16, and a battery cell 14 is disposed in the accommodation cavity 16.
  • the battery cell 14 is electrically connected to the battery cup 11 and the battery cover 12, respectively.
  • the hook portion 15 on the cover peripheral wall 122 By providing the hook portion 15 on the cover peripheral wall 122, the ability of the cover peripheral wall 122 to withstand the pressure in the axial and radial directions of the coin cell 1 is increased, and the area strength is increased, thereby reducing the thickness of the insulating seal ring 13. In addition, a stable connection between the battery cover 12 and the battery cup 11 can be ensured. In addition, because the hook portion 15 is folded toward the outer periphery of the battery cover 12, the inner space of the cover peripheral wall 122 in the radial direction of the coin cell 1 can be made larger, thereby increasing the capacity space of the battery cell 14.
  • the height of the battery cover 12 is less than the height of the battery cup 11, and the height of the battery cover 12 may be 30% to 70% less than the height of the battery cup 11. It can facilitate the cooperative installation of the battery cup 11 and the battery cover 12 and the output of two types of positive and negative electrodes.
  • the hook portion 15 includes a folded edge 151 and a hook body.
  • the folded edge 151 is formed by folding the end of the lid peripheral wall 122 away from the lid bottom wall 121 toward the outer periphery.
  • One end of the hook body is connected to the end of the folded edge 151, and the other end is bent toward the outer periphery of the battery cover 12 and extends toward the cover bottom wall 121.
  • the hook body includes a connecting edge 152, a first bent edge 153 and a second bent edge 154.
  • the first end of the connection edge 152 is connected to the end of the folded edge 151, and the second end of the connection edge 152 extends to the bottom end of the battery cell 14.
  • the first end of the first bent edge 153 is connected to the second end of the connecting edge 152, and the second end of the first bent edge 153 extends toward the outer periphery of the battery cover 12.
  • a first end of the second bent edge 154 is connected to a second end of the first bent edge 153, and a second end of the second bent edge 154 extends toward the cover bottom wall 121.
  • the mating structure of the connecting edge 152, the first bent edge 153, and the second bent edge 154 makes the hook body U-shaped.
  • the connecting edge 152, the first bent edge 153, the second bent edge 154, and The folded edge 151 forms a supporting structure, and a support structure is formed in the axial direction of the coin cell 1 by the first bent edge 153, the connecting edge 152, and the folded edge 151.
  • Multi-segment support structure the area formed is stronger and the structure is more stable.
  • the connecting ends between the connecting edge 152, the first bent edge 153, and the second bent edge 154 can be set in an arc shape to form an R angle.
  • the insulating sealing ring 13 wraps the hook portion 15 as a whole.
  • the insulating sealing ring 13 includes a first circumferential side wall 131 located in the cover circumferential wall 122, and the first circumferential side wall 131 is flush with the first circumferential inner wall 1221, or the first circumferential side wall 131 is more than the first circumferential inner wall 1221 is further away from the battery cell 14. It can be ensured that there is more space in the battery cover 12 for increasing the capacity of the coin cell battery 1.
  • the insulation sealing ring 13 may cover the turning portion of the hook portion 15, and may be 0.1 mm to 0.15 mm higher than the turning portion, or may be just flush with the turning portion.
  • the insulating sealing ring 13 can be integrally injection-molded with the battery cover 12, and the hook portion 15 is filled with plastic.
  • the insulating sealing ring 13 in another arrangement manner of the insulating sealing ring 13, includes a main body portion 132 and an inner curved portion 133.
  • the main body portion 132 is in the shape of a sleeve that is open at both ends, and the inner curved portion 133 is formed by one end of the main body portion 132 extending inward.
  • the main body portion 132 is interposed between the cup peripheral wall 112 and the lid peripheral wall 122, and the inner curved portion 133 abuts against the bottom of the hook portion 15. Further, the end portion of the inner curved portion 133 does not exceed the first circumferential inner wall 1221.
  • the thickness of the main body portion 132 in the radial direction of the battery cell 14 is equal to the thickness of the inner bent portion 133 in the axial direction of the battery cell 14.
  • the width dimension of the insulation seal ring 13 in the radial direction of the battery cell 14 is 0.3 mm to 1 mm
  • the height dimension of the insulation seal ring 13 in the axial direction of the battery cell 14 is 0.5 mm to 1.1 mm
  • the outer wall of the insulation seal ring 13 is to the second
  • the distance between the bent edge 154 and the side wall of the battery cell 14 is 0.05 mm to 0.5 mm
  • the distance from the first circumferential side wall 131 of the insulating seal ring 13 to the side wall of the connection side 152 close to the cell 14 is 0.05 mm to 0.5 mm.
  • the distance from the bottom wall of the insulating seal ring 13 to the end of the cover peripheral wall 122 is 0.6 mm.
  • the distance from the bottom wall of the insulating seal ring 13 to the first bending edge 153 It is 0.3mm, which is a reduction of 0.3mm.
  • the battery cell 14 includes a first pole piece 141, a second pole piece 142, and a diaphragm 143.
  • the first pole piece 141 and the second pole piece 142 are separated by a separator 143 and are rolled or laminated to form the battery cell 14.
  • the coin cell battery 1 further includes at least two first output conductors 17 and at least two second output conductors 18.
  • the first pole piece 141 is electrically connected to the cup bottom wall 111 through a first output conductor 17, and the second pole piece 142 is electrically connected to the cover bottom wall 121 through a second output conductor 18.
  • the number of circuits of the battery cell 14 can be increased to achieve Multi-path charging or discharging.
  • each path is independent of each other and will not cause circuit influence.
  • the button battery 1 of the present invention will not affect the normal charge and discharge of other circuits even if one of the circuits of the battery cell 14 fails.
  • the button battery 1 of the present invention has better rate characteristics, that is, it can achieve stable and rapid charge and discharge.
  • the battery cup 11 is a positive case
  • the battery cover 12 is a negative case
  • the first pole piece 141 is a positive pole piece
  • the second pole piece 142 is a negative pole piece.
  • the battery cup 11 and the battery cover 12 are metal cases.
  • the material selection of the separator 143 includes, but is not limited to, polypropylene PP, polyethylene PE, PP / PE multilayer composite, aramid or acrylic non-woven fabric, and materials formed by coating inorganic materials on the above materials.
  • the battery core 14 may be formed by winding a pole piece group consisting of a first pole piece 141 / diaphragm 143 / a second pole piece 142 / diaphragm 143 in a layer sequence, or may be a second pole piece in a layer sequence
  • the pole piece group of the sheet 142 / diaphragm 143 / first pole piece 141 / diaphragm 143 is wound.
  • Each of the first output conductor 17 and the second output conductor 18 is provided, and the first output conductor 17 is led out by the first pole piece 141 located at the outermost layer of the battery cell 14, and the second output conductor 18 is located at the outermost portion of the battery cell 14.
  • the second pole piece 142 of the layer is pulled out.
  • first output conductor 17 and the battery cup 11 may be convenient for the electrical connection of the first output conductor 17 and the battery cup 11 and the electrical connection of the second output conductor 18 and the battery cover 12.
  • Those skilled in the art may extend the first output conductor 17 and the second output conductor 18 from a certain position on the end surface of the battery cell 14 as required, which is not limited herein.
  • the separator 143 is located at the outermost layer, and the battery cell 14 is terminated by a termination tape Circumferential tightening of the outer circumferential direction.
  • the first pole piece 141 and the second pole piece 142 are separated by a separator 143 and are stacked to form the battery cell 14.
  • the battery cell 14 is formed by stacking three layers of first pole pieces 141, four layers of second pole pieces 142, and a separator 143 provided between the first pole pieces 141 and the second pole pieces 142.
  • the first pole piece 141, the second pole piece 142, and the diaphragm 143 are provided in an oval shape.
  • a first connection end protrudes from an end portion of each layer of the first pole piece 141, and the first output conductor 17 is connected to an end portion of each first connection end.
  • Each layer of the second pole piece 142 has a second connection end protruding from an end portion thereof, and the second output conductor 18 is connected to an end portion of each second connection end.
  • the battery cell 14 is wrapped by a thin film of an organic insulating material.
  • the first output conductor 17 is formed by bending the ends of the first pole piece 141, and the second output conductor 18 It is formed by bending the end of the second pole piece 142. It should be noted that the bent portions of the first pole piece 141 and the second pole piece 142 are formed by removing the functional coating on the surface of the copper foil, and forming the first output conductor 17 and the second output conductor 18 through bare copper foil.
  • the first output conductor 17 is a first current collector coupled to the first pole piece 141, and the second output conductor 18 is coupled to the first A third current collector on the pole piece 142.
  • the first pole piece 141 is exposed with a first conductive region 1411, and the first current collector is disposed on the first conductive zone 1411;
  • the second current collector is combined and disposed on the second conductive region 1421.
  • the functional coatings on the copper foil surfaces of the first and second electrode pieces 141 and 142 are removed, and the first conductive region 1411 and the second conductive region 1421 are formed by exposing the copper foil.
  • first output conductor 17 In the third specific setting manner of the first output conductor 17 and the second output conductor 18, two first output conductors 17 are provided, one of which is formed by bending one end of the first pole piece 141 and the other
  • the first output conductor 17 is a second current collector coupled to the first pole piece 141, and the second current collector is electrically connected to the first pole piece 141.
  • the first output conductor 17 protrudes from the bottom end of the battery cell 14, and is folded and located on the outer side of the battery cell 14 to form an electrical connection with the cup peripheral wall 112;
  • the second output The conductor 18 protrudes from the top end of the battery cell 14 and is folded to be located on the outer side of the battery cell 14 in the circumferential direction to form an electrical connection with the cover peripheral wall 122.
  • the coin cell battery 1 further includes a first positioning ring 19.
  • the first positioning ring 19 is sleeved on the bottom end of the battery core 14, and the first output conductor 17 is electrically connected to the cup peripheral wall 112 through the first positioning ring 19.
  • the first positioning ring 19 is a metal ring, and the first positioning ring 19 is in contact with the cup peripheral wall 112 and the first output conductor 17, respectively.
  • the first output conductor 17 communicates with the cup through the conductivity of the first positioning ring 19.
  • the peripheral wall 112 is electrically connected.
  • after the first output conductor 17 is folded and located on the outer side of the first positioning ring 19 in the circumferential direction it is electrically connected to the cup peripheral wall 112 by the pressing of the first positioning ring 19.
  • the first positioning ring 19 has a sleeve shape with both ends open, and is sleeved on the bottom end of the battery cell 14. The opposite ends of the abutment are in contact with the insulating sealing ring 13 and the cup bottom wall 111, respectively.
  • the first positioning ring 19 includes a positioning ring body 191 and an inwardly turned flange 192.
  • the positioning ring body 191 is in the shape of a sleeve with open ends.
  • the inward flange 192 is formed by folding one end of the positioning ring body 191 inward.
  • the inward flange 192 abuts against the insulating sealing ring 13 and the positioning ring body 191 and the battery core 14 A cavity 21 is formed therebetween.
  • the first output conductor 17 is folded to the outer side in the circumferential direction of the battery cell 14 and extends between the inner flange 192 and the insulating sealing ring 13.
  • the first positioning ring 19 in a third embodiment of the first positioning ring 19, includes a positioning ring body 191 and an outer flange 193.
  • the positioning ring body 191 has a sleeve shape with two ends open.
  • the outer flange 193 is formed by folding one end of the positioning ring body 191 outward.
  • the outer flange 193 abuts against the insulating sealing ring 13 and the positioning ring body 191 and the battery core 14 A cavity 21 is formed therebetween.
  • the first output conductor 17 is folded to the outer side in the circumferential direction of the battery core 14 and extends between the outer flange 193 and the insulating sealing ring 13.
  • the cavity 21 can provide an expansion space for the battery cell 14, which is more convenient to increase the capacity of the battery cell 14.
  • the cavity 21 can also utilize the inner cavity of the coin cell battery 1 to store the electrolyte to a greater extent, thereby helping the battery cell 14 to generate more electrical energy.
  • the coin cell battery 1 further includes a second positioning ring 20.
  • the second positioning ring 20 is sleeved on the top of the battery core 14, and the second output conductor 18 is electrically connected to the cover peripheral wall 122 through the second positioning ring 20.
  • the second positioning ring 20 is a metal ring, the second positioning ring 20 is in contact with the cover peripheral wall 122 and the second output conductor 18, and the second output conductor 18 passes through the second positioning ring 20. Is electrically connected to the cover peripheral wall 122. Referring to FIG.
  • the second output conductor 18 is folded and located on the outer side of the second positioning ring 20 in the circumferential direction, it is electrically connected to the cover peripheral wall 122 by the pressing of the second positioning ring 20.
  • the second positioning ring 20 may be in the shape of a sleeve with both ends open, or one end of the sleeve-shaped second positioning ring 20 is turned inward with an inwardly folded edge.
  • the width of the diaphragm 143 is greater than the width of the first pole piece 141 and the second pole piece 142.
  • the first pole piece 141, the second pole piece 142, and the diaphragm 143 are rolled to form the battery cell 14, and two isolation portions are formed by folding the portions of the two sides of the diaphragm 143 beyond the first pole piece 141 and the second pole piece 142.
  • the insulation portion is in contact with the cup bottom wall 111 and the lid bottom wall 121 to form electrical insulation.
  • the coin cell battery 1 further includes an insulating layer 22.
  • the insulating layer 22 is provided between the top end of the battery cell 14 and the cover bottom wall 121.
  • the insulating layer 22 can electrically insulate the battery cell 14 from the cover bottom wall 121.
  • the insulating layer 22 is provided between the bottom end of the battery cell 14 and the cup bottom wall 111.
  • the insulating layer 22 can electrically insulate the battery cell 14 from the cup bottom wall 111.

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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)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

一种纽扣电池(1)，纽扣电池(1)包括：电池杯(11)，包括杯底壁(111)和设于杯底壁(111)外周上的杯周壁(112)；电池盖(12)，包括盖底壁(121)和设于盖底壁(121)外周上的盖周壁(122)，盖周壁(122)远离盖底壁(121)的端部朝外周翻折并向盖底壁(121)延伸形成弯钩部(15)，盖周壁(122)插入杯周壁(112)内，且盖周壁(122)与杯周壁(112)至少部分重叠；绝缘密封圈(13)，设于盖周壁(122)与杯周壁(112)之间，且将电池杯(11)与电池盖(12)电性隔绝；及电芯(14)，设置在电池杯(11)、电池盖(12)及绝缘密封圈(13)围成的容置腔(16)内，电芯(14)分别与电池杯(11)、电池盖(12)电性连接。

Description

纽扣电池 技术领域
本发明涉及电池技术领域，特别是涉及一种纽扣电池。
背景技术
随着便携式电子产品和智能穿戴电子产品的发展，电池被要求更加的微型化。在保持较高寿命的同时，要求电池具有尽可能高的体积比能量、质量比能量。
目前，纽扣电池在装配时，需要先将负极盖翻边，再将塑料圈与负极盖的装配在一起，最后将负极盖和塑料圈压装入正极壳。由于负极盖存在翻边，为了使得装配后负极盖与正极壳连接的稳定性和强度更好，塑料圈的厚度较厚，增加了用料成本。
发明内容
根据本申请的各种实施例，提供一种能够使得负极盖与正极壳的连接强度更强，减小塑料圈厚度的纽扣电池。
一种纽扣电池，包括：
电池杯，包括杯底壁和设于所述杯底壁外周上的杯周壁；
电池盖，包括盖底壁和设于所述盖底壁外周上的盖周壁，所述盖周壁远离所述盖底壁的端部朝外周翻折并向所述盖底壁延伸形成弯钩部，所述盖周壁插入所述杯周壁内，且所述盖周壁与所述杯周壁至少部分重叠；
绝缘密封圈，设于所述盖周壁与所述杯周壁之间，且将所述电池杯与所述电池盖电性隔绝；及
电芯，设置在所述电池杯、所述电池盖及所述绝缘密封圈围成的容置腔内，所述电芯分别与所述电池杯、所述电池盖电性连接。
本发明的一个或多个实施例的细节在下面的附图和描述中提出。本发明的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更好地描述和说明这里公开的那些发明的实施例和/或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。
图1为本发明实施例一提供的纽扣电池的结构示意图；
图2为图1所示纽扣电池中的电池盖与绝缘密封圈的配合结构示意图；
图3为本发明实施例二提供的纽扣电池的结构示意图；
图4为图3所示纽扣电池中的电芯一实施例的结构示意图；
图5为图3所示纽扣电池中的电芯另一实施例的结构示意图；
图6为图1所示纽扣电池中的第一输出导体一实施方式的结构示意图；
图7为图1所示纽扣电池中的第二输出导体一实施方式的结构示意图；
图8为本发明实施例三提供的纽扣电池的结构示意图；
图9为图8所示纽扣电池中的第一定位环实施例一的结构示意图；
图10为图8所示纽扣电池中的第二定位环与第二输出导体设置方式一的结构示意图；
图11为图8所示纽扣电池中的第二定位环与第二输出导体设置方式二的结构示意图。
具体实施方式
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳实施方式。但是，本发明可以以许多不同的形式 来实现，并不限于本文所描述的实施方式。
请参阅图1，在本发明一实施例中，纽扣电池1包括电池杯11、电池盖12、绝缘密封圈13及电芯14。电池杯11包括杯底壁111和杯周壁112，杯周壁112设于杯底壁111的外周上。电池盖12包括盖底壁121和盖周壁122，盖周壁122设于盖底壁121的外周上，盖周壁122包括第一周向内壁1221。盖周壁122远离盖底壁121的端部朝外周翻折并向盖底壁121延伸形成弯钩部15。盖周壁122插入杯周壁112内，且盖周壁122与杯周壁112至少部分重叠。绝缘密封圈13设于盖周壁122与杯周壁112之间，且将电池杯11与电池盖12电性隔绝。电池杯11、电池盖12及绝缘密封圈13围成容置腔16，电芯14设置在容置腔16内，电芯14分别与电池杯11、电池盖12电性连接。通过在盖周壁122上设置弯钩部15，可以使得盖周壁122在纽扣电池1的轴向和径向上承受压力的能力更强，增加了区域强度，从而实现减小绝缘密封圈13厚度的情况下，还能保证电池盖12与电池杯11的稳定连接。此外，由于弯钩部15向电池盖12的外周翻折，可以使得盖周壁122在纽扣电池1的径向上的内部空间更大，进而增大电芯14的容量空间。
在一实施方式中，电池盖12的高度小于电池杯11的高度，电池盖12的高度可以小于电池杯11的高度30％～70％。可以便于电池杯11与电池盖12的配合安装，以及形成两种正负电极的输出。
请参阅图2，在一实施方式中，弯钩部15包括折边151和钩体。折边151由盖周壁122远离盖底壁121的端部向外周翻折形成。钩体的一端与折边151的端部连接，另一端朝电池盖12的外周弯折并向盖底壁121延伸。
请继续参阅图2，具体地，钩体包括连接边152、第一折弯边153及第二折弯边154。连接边152的第一端与折边151的端部连接，连接边152的第二端向电芯14的底端延伸。第一折弯边153的第一端与连接边152的第二端连接，第一折弯边153的第二端向电池盖12的外周延伸。第二折弯边154的第一端与第一折弯边153的第二端连接，第二折弯边154的第二端向盖底壁121延伸。连接边152、第一折弯边153及第二折弯边154的配合结构使得钩 体呈U型，在电池径向上通过连接边152、第一折弯边153、第二折弯边154及折边151形成支撑结构，在纽扣电池1的轴向上通过第一折弯边153、连接边152及折边151形成支撑结构。多段式支撑结构，形成的区域强度更强，结构更加稳定。需要说明的是，连接边152、第一折弯边153及第二折弯边154之间的连接端都可以设置成圆弧状，形成R角。
具体实施例中，第一折弯边153的长度越短，以及折边151与电芯14的轴线夹角越小时，弯钩部15沿电芯14径向上的整体宽度越小；连接边152和第二折弯边154的长度越短，以及折边151与电芯14的轴线夹角越大时，弯钩部15沿电芯14轴向上的整体高度越小。
请参阅图2，在绝缘密封圈13的一种设置方式中，绝缘密封圈13将弯钩部15整体包裹。绝缘密封圈13包括位于盖周壁122内的第一周向侧壁131，第一周向侧壁131与第一周向内壁1221齐平，或者第一周向侧壁131较第一周向内壁1221更加远离电芯14。可以保证电池盖12内有更多的空间用于增大纽扣电池1容量。具体地，绝缘密封圈13可以盖住弯钩部15的翻折处，且可以高于翻折处0.1mm～0.15mm，也可以刚好与翻折处齐平。绝缘密封圈13可以与电池盖12一体注塑成型，弯钩部15内填充塑胶。电池盖12与电池杯11安装时，对绝缘密封圈13的压力变小，可以减少绝缘密封圈13的厚度和高度。
请参阅图3，在绝缘密封圈13的另一种设置方式中，绝缘密封圈13包括主体部132和内弯部133。主体部132呈两端均开口的套筒状，内弯部133由主体部132的一端向内延伸形成。主体部132夹置在杯周壁112与盖周壁122之间，内弯部133与弯钩部15的底部抵接。进一步地，内弯部133的端部不超过第一周向内壁1221。使得绝缘密封圈13不会占用电池盖12的内部空间，可提升电芯14的容量。主体部132沿电芯14径向上的厚度与内弯部133沿电芯14轴向上的厚度相等。
绝缘密封圈13沿电芯14径向上的宽度尺寸为0.3mm～1mm，绝缘密封圈13沿电芯14轴向上的高度尺寸为0.5mm～1.1mm，绝缘密封圈13的外侧 壁到第二折弯边154远离电芯14的侧壁的距离为0.05mm～0.5mm，绝缘密封圈13的第一周向侧壁131到连接边152靠近电芯14的侧壁的距离为0.05mm～0.5mm。现有技术中，绝缘密封圈13的底壁到盖周壁122端部的距离为0.6mm，而在本实用新型纽扣电池1中，绝缘密封圈13的底壁到第一折弯边153的距离为0.3mm，减少了0.3mm。
在一实施例中，电芯14包括第一极片141、第二极片142和隔膜143。第一极片141与第二极片142之间通过隔膜143间隔，并卷制或层叠形成电芯14。
请参阅图3和图4，具体应用中，纽扣电池1还包括至少两个第一输出导体17和至少两个第二输出导体18。第一极片141通过第一输出导体17与杯底壁111电连接，第二极片142通过第二输出导体18与盖底壁121电连接。通过在电芯14的第一极片141上设置有至少两条第一输出导体17，第二极片142上设置有至少两条第二输出导体18，可以增加电芯14的电路数量，实现多路径的充电或放电。并且，各个路径之间相互独立，不会造成电路影响。现有的可充电纽扣电池1由于只有一条充放电电路，因此，只要该电路出现故障，可充电纽扣电池1将无法继续使用。本发明的纽扣电池1，就算电芯14的其中一条电路故障，也不会影响其他电路的正常充放电。本发明的纽扣电池1的倍率特性更好，即能实现稳定、快速的充放电。
具体地，电池杯11为正极壳，电池盖12为负极壳。对应地，第一极片141为正极片，第二极片142为负极片。电池杯11和电池盖12为金属外壳。隔膜143的材料选择，包括但不限于聚丙烯PP、聚乙烯PE、PP/PE多层复合、芳纶或腈纶无纺布，以及在以上材料上涂覆了无机物而形成的材料。
在一实施方式中，电芯14可以由层序为第一极片141/隔膜143/第二极片142/隔膜143组成的极片组卷绕而成，也可以由层序为第二极片142/隔膜143/第一极片141/隔膜143的极片组卷绕而成。第一输出导体17和第二输出导体18均设有一个，且第一输出导体17由位于电芯14最外层的第一极片141引出，第二输出导体18由位于电芯14最外层的第二极片142引出。可 以便于第一输出导体17与电池杯11的电性连接设置，以及第二输出导体18与电池盖12的电性连接设置。本领域的技术人员可以根据需要将第一输出导体17和第二输出导体18从电芯14端面的某个位置延伸出，此处不作限制。此外，需要说明的是，第一极片141与第二极片142之间通过隔膜143间隔，并卷制成电芯14后，隔膜143是位于最外层，且通过终止胶带将电芯14的周向外侧缠绕紧固。
请参阅图5，在另一实施方式中，第一极片141与第二极片142之间通过隔膜143间隔，并层叠设置形成电芯14。具体地，电芯14是由三层第一极片141、四层第二极片142以及设于第一极片141、第二极片142之间的隔膜143层叠而成。第一极片141、第二极片142和隔膜143设置成椭圆形。每层第一极片141的端部均伸出有第一连接端，第一输出导体17与各第一连接端的端部连接。每层第二极片142的端部均伸出有第二连接端，第二输出导体18与各第二连接端的端部连接。电芯14由有机绝缘材料薄膜烫封包裹。
请参阅图6和图7，在第一输出导体17和第二输出导体18的具体设置方式一中，第一输出导体17由第一极片141的端部折弯形成，第二输出导体18由第二极片142的端部折弯形成。需要说明的是，第一极片141和第二极片142的折弯部分是将铜箔表面的功能涂层去除，通过铜箔裸露出来形成第一输出导体17和第二输出导体18的。
在第一输出导体17和第二输出导体18的具体设置方式二中，第一输出导体17为结合设于第一极片141上的第一集流体，第二输出导体18为结合设于第二极片142上的第三集流体。请参阅图6和图7，具体地，第一极片141外露有第一导电区1411，第一集流体结合设于第一导电区1411上；第二极片142外露有第二导电区1421，第二集流体结合设于第二导电区1421上。将第一极片141和第二极片142铜箔表面的功能涂层去除，通过铜箔裸露出来形成第一导电区1411和第二导电区1421。
在第一输出导体17和第二输出导体18的具体设置方式三中，第一输出导体17设有两个，其中一个第一输出导体17由第一极片141的一端折弯形 成，另一个第一输出导体17为结合设于第一极片141上的第二集流体，第二集流体与第一极片141电连接。第二输出导体18设有两个，其中一个第二输出导体18由第二极片142的一端折弯形成，另一个第二输出导体18为结合设于第二极片142上的第四集流体，第四集流体与第二极片142电连接。
请参阅图8，在一实施例中，第一输出导体17从电芯14的底端伸出，并翻折位于电芯14的周向外侧后与杯周壁112形成电性连接；第二输出导体18从电芯14的顶端伸出，并翻折位于电芯14的周向外侧后与盖周壁122形成电性连接。
为了使得第一输出导体17与杯周壁112电连接更加稳定，纽扣电池1还包括第一定位环19。第一定位环19套设于电芯14的底端，第一输出导体17通过第一定位环19与杯周壁112电性连接。在一实施方式中，第一定位环19为金属环，第一定位环19分别与杯周壁112、第一输出导体17抵接，第一输出导体17通过第一定位环19的导电性与杯周壁112电性连接。在另一实施方式中，第一输出导体17翻折位于第一定位环19的周向外侧后，通过第一定位环19的抵压与杯周壁112电连接。
请参阅图9，在第一定位环19的第一实施方式中，第一定位环19呈两端均开口的套筒状，并套设于电芯14的底端，第一定位环19套的相对两端分别与绝缘密封圈13、杯底壁111抵接。
请参阅图1，在第一定位环19的第二实施方式中，第一定位环19包括定位环本体191和内翻边192。定位环本体191呈两端开口的套筒状，内翻边192由定位环本体191的一端向内翻折形成，内翻边192与绝缘密封圈13抵接，定位环本体191与电芯14之间形成有空腔21。第一输出导体17翻折至电芯14的周向外侧并延伸至内翻边192与绝缘密封圈13之间。
请参阅图3和图8，在第一定位环19的第三实施方式中，第一定位环19包括定位环本体191和外翻边193。定位环本体191呈两端开口的套筒状，外翻边193由定位环本体191的一端向外翻折形成，外翻边193与绝缘密封圈13抵接，定位环本体191与电芯14之间形成有空腔21。第一输出导体17 翻折至电芯14的周向外侧并延伸至外翻边193与绝缘密封圈13之间。
空腔21可以为电芯14提供膨胀空间，更加便于增大电芯14的容量。并且，空腔21还可以更大限度的利用纽扣电池1内腔储存电解液，帮助电芯14产生更多的电能。
请参阅图1和图8，为了使得第二输出导体18与盖周壁122电连接更加稳定，纽扣电池1还包括第二定位环20。第二定位环20套设于电芯14的顶端，第二输出导体18通过第二定位环20与盖周壁122电性连接。请参阅图10，在一实施方式中，第二定位环20为金属环，第二定位环20分别与盖周壁122、第二输出导体18抵接，第二输出导体18通过第二定位环20的导电性与盖周壁122电性连接。请参阅图11，在另一实施方式中，第二输出导体18翻折位于第二定位环20的周向外侧后，通过第二定位环20的抵压与盖周壁122电连接。第二定位环20可以呈两端均开口的套筒状，或者在套筒状的第二定位环20的一端向内翻折有内折边。
考虑到需要防止电芯14的端部与盖底壁121、杯底壁111接触产生漏电。在一实施例中，隔膜143宽度大于第一极片141、第二极片142的宽度。第一极片141、第二极片142和隔膜143卷制成电芯14，并通过隔膜143两侧超出第一极片141、第二极片142的部分翻折形成有两个隔绝部，且隔绝部对应与杯底壁111、盖底壁121抵接形成电绝缘。
请参阅图1、图3及图8，在另一实施例中，纽扣电池1还包括绝缘层22。绝缘层22设于电芯14的顶端与盖底壁121之间，绝缘层22能够将电芯14与盖底壁121电绝缘。绝缘层22设于电芯14的底端与杯底壁111之间，绝缘层22能够将电芯14与杯底壁111电绝缘。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (35)

  1. 一种纽扣电池，包括：
    电池杯，包括杯底壁和设于所述杯底壁外周上的杯周壁；
    电池盖，包括盖底壁和设于所述盖底壁外周上的盖周壁，所述盖周壁远离所述盖底壁的端部朝外周翻折并向所述盖底壁延伸形成弯钩部，所述盖周壁插入所述杯周壁内，且所述盖周壁与所述杯周壁至少部分重叠；
    绝缘密封圈，设于所述盖周壁与所述杯周壁之间，且将所述电池杯与所述电池盖电性隔绝；及
    电芯，设置在所述电池杯、所述电池盖及所述绝缘密封圈围成的容置腔内，所述电芯分别与所述电池杯、所述电池盖电性连接。
  2. 根据权利要求1所述的纽扣电池，其特征在于，所述弯钩部包括折边和钩体，所述折边由所述盖周壁远离所述盖底壁的端部向外周翻折形成，所述钩体的一端与所述折边的端部连接，所述钩体的另一端朝所述电池盖的外周弯折并向所述盖底壁延伸。
  3. 根据权利要求2所述的纽扣电池，其特征在于，所述钩体包括连接边、第一折弯边及第二折弯边，所述连接边的第一端与所述折边的端部连接，所述连接边的第二端向所述电芯的底端延伸，所述第一折弯边的第一端与所述连接边的第二端连接，所述第一折弯边的第二端向所述电池盖的外周延伸，所述第二折弯边的第一端与所述第一折弯边的第二端连接，所述第二折弯边的第二端向所述盖底壁延伸。
  4. 根据权利要求1所述的纽扣电池，其特征在于，所述绝缘密封圈将所述弯钩部包裹。
  5. 根据权利要求1所述的纽扣电池，其特征在于，所述盖周壁包括第一 周向内壁，所述绝缘密封圈包括位于所述盖周壁内的第一周向侧壁，所述第一周向侧壁与所述第一周向内壁齐平。
  6. 根据权利要求1所述的纽扣电池，其特征在于，所述盖周壁包括第一周向内壁，所述绝缘密封圈包括位于所述盖周壁内的第一周向侧壁，所述第一周向侧壁较所述第一周向内壁更加远离所述电芯。
  7. 根据权利要求1所述的纽扣电池，其特征在于，所述绝缘密封圈包括主体部和内弯部，所述主体部呈两端均开口的套筒状，所述内弯部由所述主体部的一端向内延伸形成，所述主体部夹置在所述杯周壁与所述盖周壁之间，所述内弯部与所述弯钩部的底部抵接。
  8. 根据权利要求7所述的纽扣电池，其特征在于，所述盖周壁包括第一周向内壁，所述内弯部的端部不超过所述第一周向内壁。
  9. 根据权利要求1所述的纽扣电池，其特征在于，所述电芯包括第一极片、第二极片和隔膜，所述第一极片与所述第二极片之间通过所述隔膜间隔，并卷制或层叠形成所述电芯。
  10. 根据权利要求9所述的纽扣电池，其特征在于，还包括第一输出导体，所述第一输出导体分别与所述第一极片、所述电池杯电性连接。
  11. 根据权利要求10所述的纽扣电池，其特征在于，所述第一输出导体由所述第一极片的一端折弯形成。
  12. 根据权利要求10所述的纽扣电池，其特征在于，所述第一输出导体为结合设于所述第一极片上的第一集流体。
  13. 根据权利要求12所述的纽扣电池，其特征在于，所述第一极片外露有第一导电区，所述第一集流体结合设于所述第一导电区上。
  14. 根据权利要求10所述的纽扣电池，其特征在于，所述第一输出导体 设有至少两个。
  15. 根据权利要求14所述的纽扣电池，其特征在于，一个所述第一输出导体由所述第一极片的一端折弯形成，另一个所述第一输出导体为结合设于所述第一极片上的第二集流体，所述第二集流体与所述第一极片电连接。
  16. 根据权利要求10所述的纽扣电池，其特征在于，所述第一输出导体从所述电芯的底端伸出，并翻折位于所述电芯的周向外侧后与所述杯周壁形成电性连接。
  17. 根据权利要求16所述的纽扣电池，其特征在于，还包括第一定位环，所述第一定位环套设于所述电芯的底端，所述第一输出导体通过所述第一定位环与所述杯周壁电性连接。
  18. 根据权利要求17所述的纽扣电池，其特征在于，所述第一定位环为金属环，所述第一定位环分别与所述杯周壁、所述第一输出导体抵接。
  19. 根据权利要求17所述的纽扣电池，其特征在于，所述第一输出导体翻折位于所述第一定位环的周向外侧后，通过所述第一定位环的抵压与所述杯周壁电连接。
  20. 根据权利要求17所述的纽扣电池，其特征在于，所述第一定位环呈两端均开口的套筒状，并套设于所述电芯的底端，所述第一定位环套的相对两端分别与所述绝缘密封圈、所述杯底壁抵接。
  21. 根据权利要求17所述的纽扣电池，其特征在于，所述第一定位环包括定位环本体和内翻边，所述定位环本体呈两端开口的套筒状，所述内翻边由所述定位环本体的一端向内翻折形成，所述内翻边与所述绝缘密封圈抵接，所述定位环本体与所述电芯之间形成有空腔。
  22. 根据权利要求17所述的纽扣电池，其特征在于，所述第一定位环包 括定位环本体和外翻边，所述定位环本体呈两端开口的套筒状，所述外翻边由所述定位环本体的一端向外翻折形成，所述外翻边与所述绝缘密封圈抵接，所述定位环本体与所述电芯之间形成有空腔。
  23. 根据权利要求9所述的纽扣电池，其特征在于，还包括第二输出导体，所述第二输出导体分别与所述第二极片、所述电池盖电性连接。
  24. 根据权利要求23所述的纽扣电池，其特征在于，所述第二输出导体由所述第二极片的一端折弯形成。
  25. 根据权利要求23所述的纽扣电池，其特征在于，所述第二输出导体为结合设于所述第二极片上的第三集流体。
  26. 根据权利要求25所述的纽扣电池，其特征在于，所述第二极片外露有第二导电区，所述第三集流体结合设于所述第二导电区上。
  27. 根据权利要求23所述的纽扣电池，其特征在于，所述第二输出导体设有至少两个。
  28. 根据权利要求27所述的纽扣电池，其特征在于，一个所述第二输出导体由所述第二极片的一端折弯形成，另一个所述第二输出导体为结合设于所述第二极片上的第四集流体，所述第四集流体与所述第二极片电连接。
  29. 根据权利要求23所述的纽扣电池，其特征在于，所述第二输出导体从所述电芯的顶端伸出，并翻折位于所述电芯的周向外侧后与所述盖周壁形成电性连接。
  30. 根据权利要求29所述的纽扣电池，其特征在于，还包括第二定位环，所述第二定位环套设于所述电芯的顶端，所述第二输出导体通过所述第二定位环与所述盖周壁电性连接。
  31. 根据权利要求30所述的纽扣电池，其特征在于，所述第二定位环为 金属环，所述第二定位环分别与所述盖周壁、所述第二输出导体抵接。
  32. 根据权利要求30所述的纽扣电池，其特征在于，所述第二输出导体翻折位于所述第二定位环的周向外侧后，通过所述第二定位环的抵压与所述盖周壁电连接。
  33. 根据权利要求9所述的纽扣电池，其特征在于，所述隔膜宽度大于所述第一极片、所述第二极片的宽度，所述第一极片、所述第二极片和所述隔膜卷制成所述电芯，并通过所述隔膜两侧超出所述第一极片、所述第二极片的部分翻折形成有两个隔绝部，且两个所述隔绝部对应与所述杯底壁、所述盖底壁抵接。
  34. 根据权利要求1所述的纽扣电池，其特征在于，还包括绝缘层，所述绝缘层设于所述电芯的顶端与所述盖底壁之间，所述绝缘层用于将所述电芯与所述盖底壁电绝缘。
  35. 根据权利要求1所述的纽扣电池，其特征在于，还包括绝缘层，所述绝缘层设于所述电芯的底端与所述杯底壁之间，所述绝缘层用于将所述电芯与所述杯底壁电绝缘。
PCT/CN2019/084413 2018-09-20 2019-04-26 纽扣电池 WO2020057127A1 (zh)

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