WO2021179525A1 - 一种电池顶盖结构及装配方法 - Google Patents

一种电池顶盖结构及装配方法 Download PDF

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Publication number
WO2021179525A1
WO2021179525A1 PCT/CN2020/106430 CN2020106430W WO2021179525A1 WO 2021179525 A1 WO2021179525 A1 WO 2021179525A1 CN 2020106430 W CN2020106430 W CN 2020106430W WO 2021179525 A1 WO2021179525 A1 WO 2021179525A1
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WIPO (PCT)
Prior art keywords
top cover
cover sheet
electrode
battery
convex
Prior art date
Application number
PCT/CN2020/106430
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English (en)
French (fr)
Inventor
李勇军
王程
邹武元
姜斌
郭玉国
Original Assignee
江苏塔菲尔新能源科技股份有限公司
东莞塔菲尔新能源科技有限公司
深圳塔菲尔新能源科技有限公司
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Application filed by 江苏塔菲尔新能源科技股份有限公司, 东莞塔菲尔新能源科技有限公司, 深圳塔菲尔新能源科技有限公司 filed Critical 江苏塔菲尔新能源科技股份有限公司
Priority to EP20924744.4A priority Critical patent/EP4120464A1/en
Publication of WO2021179525A1 publication Critical patent/WO2021179525A1/zh
Priority to US17/940,920 priority patent/US20230006290A1/en

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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
    • 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
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • 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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • 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
    • 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
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • 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
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • 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
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • 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 belongs to the technical field of battery production and manufacturing, and specifically relates to a battery top cover structure and an assembly method.
  • the top cover pole structure has been widely used in the top cover setting of power batteries. Normally, the top cover sheet is designed with a first pole through hole and a second pole through hole, which are fastened to the pole, The seal is sleeved on the top cover sheet to realize the electrical connection function,
  • the purpose of the present invention is to provide a battery top cover structure in view of the deficiencies of the prior art, which eliminates the need for injection molded parts, reduces the risk of material deformation, and at the same time ensures the sealing performance between the top cover and the electrode, and helps to improve the electrical Core safety performance.
  • a battery top cover structure comprising a top cover sheet and a first electrode arranged on the top cover sheet, a sealing sleeve is sleeved between the first electrode and the top cover sheet, and the first electrode includes a conductive
  • the top part of the welding part passes through the top cover sheet and is fixed to the conductive part, and the bottom part of the welding part is fixed to the bottom surface of the top cover sheet through lower plastic.
  • the conductive member includes a plate body and a boss mounted on the bottom of the plate body, and the welding member includes a ring body and is disposed on the ring body.
  • the convex post, the top of the convex post is provided with a welding hole matching with the boss.
  • the sealing sleeve includes a sleeve body and a convex portion arranged at the bottom of the sleeve body, the convex portion is provided with a through hole, and the through hole A first concave portion for accommodating the board body is formed on the top, and the convex column is inserted into the convex portion through the through hole.
  • the edge of the ring body extends upward to form a convex edge, and the bottom surface of the lower plastic is provided with a groove that matches with the convex edge.
  • An outer edge is formed on the side of the seat corresponding to the board body, and the outer diameter of the outer edge is equal to the outer diameter of the board body.
  • the sealing sleeve is made of fluoroplastic injection molding or fluororubber die-cutting, and the board body and the boss are made of aluminum or copper-aluminum composite material The boss and the welding part are made of copper material.
  • the top cover sheet is formed with a second electrode.
  • the top cover sheet is provided with a mounting hole, and the top of the mounting hole is formed with a second recess for accommodating the sealing sleeve.
  • the bottom surfaces of the two concave portions are concave-convex matched with the sealing sleeve, the bottom of the mounting hole is formed with a third concave portion for accommodating the lower plastic, and the bottom surface of the third concave portion is concave-convex matched with the lower plastic.
  • the surface of the lower plastic is provided with a convex body
  • the top cover sheet is provided with a concave body that cooperates with the convex body
  • the top cover sheet is also provided with at least one of an explosion-proof valve vent hole and a liquid injection hole.
  • An explosion-proof valve is installed between the explosion-proof valve, and a protective film is installed on the top of the vent of the explosion-proof valve.
  • a method for assembling a battery top cover structure including:
  • the bottom of the welding piece is fixed to the bottom surface of the top cover sheet through the lower plastic, and the lower plastic functions as an insulating welding piece and the bottom surface of the top cover sheet.
  • the bottom surface of the top cover sheet is matched with the first electrode to be fastened to the top cover sheet through the sealing sleeve.
  • the first electrode is divided into conductive parts and welding parts to facilitate the sealing sleeve on the first electrode, eliminating the need for injection molding process to form the fastening pole of the injection molded parts, reducing the probability of material deformation;
  • the sealing sleeve 4 is made of Fluoroplastic injection molding or fluororubber die-cutting molding, assembly parts made of good electrical insulation, high heat resistance, oil resistance, solvent resistance, abrasion resistance, humidity resistance and low temperature resistance, help Extend the service life of the sealing sleeve.
  • the present invention includes a top cover sheet and a first electrode arranged on the top cover sheet, a sealing sleeve is sleeved between the first electrode and the top cover sheet, and the first electrode It includes a conductive part and a welding part, the top of the welding part is fixed to the conductive part through the top cover sheet, and the bottom of the welding part is fixed to the bottom surface of the top cover sheet through a lower plastic.
  • the existing top cover sheet is designed with the first pole and the second pole through hole, the injection molded parts are fastened to the pole and sealed on the top cover sheet to realize the electrical connection function, and the assembly process of the top cover pole is complicated, and There is a high risk of failure of injection molded parts, which will cause secondary crystallization and stress, which will cause deformation of the injection molded parts, resulting in air leakage of the pole, thereby reducing the safety performance of the battery cell, or even scrapping.
  • the first electrode is divided into conductive parts and welding parts to facilitate
  • the sealing sleeve is sleeved on the first electrode, and the first electrode is fastened to the top cover sheet, which not only plays the role of insulation between the top cover sheet and the first electrode, but also ensures the airtightness between the top cover sheet and the first electrode, At the same time, it eliminates the need for injection molded parts to form the fastening poles, which reduces the probability of material deformation; the top of the welded parts is fixed to the conductive parts through the top cover sheet, which can improve the stability between the welded parts and the conductive parts , To prevent the conductive parts from falling off the sealing sleeve, which helps to improve the safety of the battery.
  • the bottom of the welding part is fixed to the bottom surface of the top cover sheet through the lower plastic, and the lower plastic serves as the insulating welding part and the bottom surface of the top cover sheet.
  • the bottom of the welding piece is fixed on the bottom surface of the top cover sheet, and the first electrode is fastened to the top cover sheet through the sealing sleeve, which is equivalent to the bottom of the first electrode being clamped on the bottom surface of the top cover sheet, which helps to improve the first electrode.
  • the invention eliminates the injection molded parts, reduces the risk of material deformation, and at the same time ensures the sealing performance between the top cover and the electrode, and helps to improve the safety performance of the electric core.
  • Figure 1 is a schematic diagram of the structure of the present invention.
  • Figure 2 is an exploded schematic diagram of the present invention.
  • Fig. 3 is a schematic cross-sectional view of the first electrode after installation in the present invention.
  • Fig. 4 is an exploded schematic diagram of the first electrode in the present invention after installation.
  • Fig. 5 is a schematic cross-sectional view of the second electrode after installation in the present invention.
  • Figure 6 is a schematic diagram of the structure of the sealing sleeve of the present invention.
  • Fig. 7 is a schematic diagram of the structure of the weldment in the present invention.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense.
  • it may be a fixed connection or a detachable connection.
  • integrally connected it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between the two components.
  • the specific meanings of the above-mentioned terms in the present invention can be understood according to specific situations.
  • a battery top cover structure comprising a top cover sheet 1 and a first electrode 2 arranged on the top cover sheet 1, a sealing sleeve 4 is sleeved between the first electrode 2 and the top cover sheet 1, and the first electrode 2 includes a conductive member 21 and the welding piece 22, the top of the welding piece 22 passes through the top cover sheet 1 and is fixed to the conductive element 21, and the bottom of the welding piece 22 is fixed to the bottom surface of the top cover sheet 1 through the lower plastic 5.
  • the existing top cover sheet is designed with the first pole and the second pole through hole, the injection molded parts are fastened to the pole and sealed on the top cover sheet to realize the electrical connection function, and the assembly process of the top cover pole is complicated, and There is a high risk of failure of injection molded parts, which will cause secondary crystallization and stress, which will cause deformation of the injection molded parts, resulting in air leakage of the pole, thereby reducing the safety performance of the battery cell, or even scrapping.
  • the first electrode 2 is divided into a conductive part 21 and a welding part 22 , It is convenient to put the sealing sleeve 4 on the first electrode 2, and the first electrode 2 is fastened to the top cover sheet 1, which not only plays a role of insulation between the top cover sheet 1 and the first electrode 2, but also ensures the top cover sheet
  • the member 21 can improve the stability between the welding member 22 and the conductive member 21, and prevent the conductive member 21 from falling off from the sealing sleeve 4, which helps to improve the safety of the battery.
  • the bottom of the welding member 22 is fixed by the lower plastic 5
  • the lower plastic 5 functions to insulate the welding piece 22 and the bottom surface of the top cover sheet 1.
  • the bottom of the welding piece 22 is fixed to the bottom surface of the top cover sheet 1, and the first electrode 2 passes through the sealing sleeve 4 is fastened to the top cover sheet 1, which is equivalent to clamping the bottom of the first electrode 2 on the bottom surface of the top cover sheet 1, which helps to improve the stability between the first electrode 2 and the top cover sheet 1.
  • the sealing sleeve 4 is made of Fluoroplastic injection molding or fluororubber die-cutting molding, assembly parts made of good electrical insulation, high heat resistance, oil resistance, solvent resistance, abrasion resistance, humidity resistance and low temperature resistance, help The service life of the sealing sleeve 4 is prolonged, thereby improving the safety performance of the battery cell. Compared with the injection molded parts of the overmolding injection molding process, it is not only convenient to disassemble and install, but also can reduce the cost of manufacturing the battery.
  • the conductive member 21 includes a board body 211 and a boss 212 installed at the bottom of the board body 211.
  • the welding member 22 includes a ring body 221 and a boss 222 disposed on the ring body 221. The top of the boss 222 is provided with a boss 212. 212 matching welding hole 2221.
  • the boss 212 cooperates with the welding hole 2221 to facilitate the insertion of the welding piece 22 into the conductive piece 21, which not only reduces the overall thickness of the top cover, reduces the space occupied by the battery, thereby increasing the energy density of the battery, but also facilitates the welding of the conductive piece 21
  • the part 22 is welded, that is, welding is carried out along the gap formed by the boss 212 and the welding hole 2221, which helps to reduce the welding cost of the conductive part 21 and the welding part 22, while simplifying the welding process and helping to improve the assembly efficiency;
  • the pillar 222 is a hollow structure and protrudes upward, and the top of the convex pillar 222 is provided with a welding hole 2221 matched with the boss 212.
  • the convex pillar 222 forms a space for accommodating the electrode ears of the battery. Compared with the solid convex pillar 222, It can prevent the welding of the battery cell tabs from occupying the space inside the battery, which helps to improve the space utilization rate inside the battery, thereby increasing the energy density of the battery.
  • the sealing sleeve 4 includes a sleeve body 41 and a convex portion 42 provided at the bottom of the sleeve body 41.
  • the convex portion 42 is provided with a through hole 421, and the top of the through hole 421 is formed with a first concave portion 4211 for receiving the plate body 211,
  • the protrusion 222 passes through the through hole 421 and is inserted into the protrusion 42.
  • a convex portion 42 is added at the bottom of the sealing sleeve 4, and a through hole 421 is provided on the convex portion 42 to embed the convex column 222 into the sealing sleeve 4, that is, to surround the top of the welding piece 22 to serve as a gap between the welding ring and the top cover sheet 1.
  • the insulating effect helps reduce the gap between the sealing sleeve 4 and the welding part 22, thereby improving the sealing performance between the sealing sleeve 4 and the first electrode 2.
  • the sealing sleeve 4 is provided with a through hole to facilitate the alignment of the conductive parts. 21 and the welding piece 22 are welded.
  • the edge of the ring body 221 extends upward to form a convex edge 2211, and the bottom surface of the lower plastic 5 is provided with a groove 51 that matches with the convex edge 2211.
  • the convex edge 2211 and the groove 51 cooperate with each other to fix the position of the ring body 221, thereby fixing the position of the welding piece 22, that is, the bottom of the welding piece 22 abuts against the bottom surface of the lower plastic 5 to realize the bottom of the first electrode 2 Clamping on the bottom surface of the lower plastic 5 helps to improve the stability between the top cover sheet 1 and the first electrode 2.
  • the top cover sheet 1 is formed with a second electrode 3.
  • the second electrode 3 is formed by integral molding or welding of the top cover sheet 1.
  • the top cover sheet 1 protrudes upwards to form a convex hull structure, a bump structure or other convex structures, and it only needs to meet the requirements of the top cover
  • the position of the sheet 1 corresponding to the second electrode 3 can be raised upwards, but the present invention is not limited to this.
  • the second electrode 3 may also have a planar structure, that is, it is flat with the surface of the top cover sheet 1, which helps to reduce the top cover.
  • the space occupied by the depolarizing post connector is conducive to reducing the size of the battery.
  • the top cover sheet 1 is provided with a mounting hole 11, the top of the mounting hole 11 is formed with a second recess 111 for accommodating the sealing sleeve 4.
  • a third recess 112 for accommodating the lower plastic 5 is formed, and the bottom surface of the third recess 112 is concave-convex matched with the lower plastic 5.
  • the top cover sheet 1 is provided with a second recess 111, which can partially embed the sealing sleeve 4 on the top cover sheet 1 to prevent the horizontal displacement of the sealing sleeve 4 and help improve the stability between the top cover sheet 1 and the sealing sleeve 4 , It also helps to reduce the overall thickness of the top cover structure.
  • the top cover sheet 1 is provided with a third recess 112, which helps to reduce the space inside the battery occupied by the top cover structure, which is beneficial to increase the energy density of the battery and prevent the occurrence of the lower plastic 5
  • the horizontal movement can improve the stability between the top cover sheet 1 and the lower plastic 5.
  • the top cover sheet 1 is also provided with at least one of an explosion-proof valve vent 13 and a liquid injection hole 14, an explosion-proof valve 6 is installed between the top cover sheet 1 and the lower plastic 5, and the explosion-proof valve vent 13 is installed on the top There is a protective film 7.
  • the injection hole 14 is convenient for injecting electrolyte into the battery.
  • the explosion-proof valve 6 can automatically and quickly release the battery pressure when the battery's internal pressure rises due to overcharge, overdischarge, overcurrent and internal short circuit of the battery, so as to avoid the explosion of the battery.
  • the protective film 7 can prevent external impurities from entering the explosion-proof valve 6 and affecting the function of the explosion-proof valve 6.
  • the working principle of the present invention is:
  • the existing top cover sheet is designed with the first pole and the second pole through hole, the injection molded parts are fastened to the pole and sealed on the top cover sheet to realize the electrical connection function, and the assembly process of the top cover pole is complicated, and There is a high risk of failure of injection molded parts, which will cause secondary crystallization and stress, which will cause deformation of the injection molded parts, resulting in air leakage of the pole, thereby reducing the safety performance of the battery cell, or even scrapping.
  • the first electrode 2 is divided into a conductive part 21 and a welding part 22 , It is convenient to put the sealing sleeve 4 on the first electrode 2, and the first electrode 2 is fastened to the top cover sheet 1, which not only plays a role of insulation between the top cover sheet 1 and the first electrode 2, but also ensures the top cover sheet
  • the member 21 can improve the stability between the welding member 22 and the conductive member 21, and prevent the conductive member 21 from falling off from the sealing sleeve 4, which helps to improve the safety of the battery.
  • the bottom of the welding member 22 is fixed by the lower plastic 5 On the bottom surface of the top cover sheet 1, the lower plastic 5 functions to insulate the welding piece 22 and the bottom surface of the top cover sheet 1.
  • the bottom of the welding piece 22 is fixed to the bottom surface of the top cover sheet 1, and the first electrode 2 passes through the sealing sleeve 4 Fastening to the top cover sheet 1, which is equivalent to clamping the bottom of the first electrode 2 on the bottom surface of the top cover sheet 1, which helps to improve the stability between the first electrode 2 and the top cover sheet 1.
  • the second The electrode 3 is formed by integral molding or welding of the top cover sheet 1. It can be formed by upward protrusion or non-protrusion.
  • the convex post 222 is a hollow structure, it is convex upward, and the convex post
  • the top of the 222 is provided with a welding hole 2221 matched with the boss 212.
  • the boss 222 forms a space for accommodating the cell tabs. Compared with the solid boss 222, it can prevent the cell tabs after welding from encroaching on the inside of the battery. Space helps to improve the space utilization rate inside the battery, thereby increasing the energy density of the battery.
  • the boss 212 of this embodiment is formed with an outer edge 2121 on the side corresponding to the board body 211.
  • the outer edge of the outer edge 2121 is equal to the outer diameter of the board body 211
  • the sealing sleeve 4 is made of fluoroplastic injection molding. Molding or fluororubber die-cutting, the board body 211 and the boss 212 are made of aluminum or copper-aluminum composite material, the boss 212 and the welded part 22 are both made of copper, and the surface of the lower plastic 5 is provided with a convex body 52 ,
  • the top cover sheet 1 is provided with a concave body that cooperates with the convex body 52.
  • the side of the boss 212 corresponding to the board body 211 is provided with an outer edge 2121, which helps to increase the contact area between the boss 212 and the board body 211, reduces the resistance of the conductive member 21, thereby reducing heat generation, and helps to improve the electrical conductivity of the conductive member 21.
  • the sealing sleeve 4 is made of fluoroplastic injection molding or fluororubber die-cutting, with good electrical insulation, high heat resistance, oil resistance, solvent resistance, abrasion resistance, humidity resistance and low temperature resistance It is helpful to extend the service life of the sealing sleeve 4; because the price of aluminum material is lower than that of copper material, when the negative current collector sheet is made of copper foil material, the boss 212 and the welding piece 22 are the materials corresponding to the negative current collector sheet
  • the board body 211 is made of aluminum material, and the convex seat 212 is made of copper material, which can ensure that the quality of the battery is not affected, and reduce the production cost of the negative electrode;
  • the convex body 52 can also be a hot-melt column.
  • the hot-melt column is melted by heating, which is equivalent to that the hot-melt column is completely melted in the concave body.
  • a method for assembling a battery top cover structure including:
  • the second electrode 3 is formed on the top cover sheet 1 by welding or integral molding;
  • the negative tab of the cell is welded to the first electrode 2, and then the positive tab of the cell is welded to the second electrode 3.
  • the second electrode 3 is formed by integral molding or welding of the top cover sheet 1, and can be formed by upward protrusion or non-protrusion.
  • the mounting hole for the second electrode 3 is reserved on the upper part, which can not only improve the sealing performance, structural stability and safety of the battery, but also reduce the manufacturing cost, and save the space occupied by the pole connector, which is beneficial to reduce the size of the battery;
  • the bottom of the piece 22 is fixed to the bottom surface of the top cover sheet 1 through the lower plastic 5, the lower plastic 5 functions as an insulating welding piece 22 and the bottom surface of the top cover sheet 1, and the convex edge 2211 and the groove 51 are concave-convex matched to act as a fixing ring
  • the position of the body 221 fixes the position of the welding piece 22, that is, the bottom of the welding piece 22 abuts against the bottom surface of the lower plastic 5, so that the bottom of the first electrode 2 is clamped on the bottom surface of the lower plastic 5, which helps to improve the top cover sheet.
  • the injection molded parts can reduce the probability of material deformation.
  • the boss 222 can be embedded in the sealing sleeve 4, that is, the top of the welding part 22 can be surrounded.
  • the gap between the sleeve 4 and the welding piece 22 improves the sealing performance between the sealing sleeve 4 and the first electrode 2; in addition, because the protruding post 222 is a hollow structure, it protrudes upward, and the top of the protruding post 222 is arranged with the convex
  • the socket 212 is matched with the welding hole 2221, and the boss 222 forms a space for accommodating the battery cell tabs.
  • the sealing sleeve 4 is made of fluoroplastic injection molding or fluororubber die-cutting, and the assembly made of it has good electrical insulation performance, high heat resistance, and oil resistance. , Solvent resistance, abrasion resistance, humidity resistance and low temperature resistance, help to extend the service life of the sealing sleeve 4.

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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)
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Abstract

属于电池生产制造的技术领域，具体涉及一种电池顶盖结构，包括顶盖片(1)及设置在所述顶盖片(1)的第一电极(2)，所述第一电极(2)和所述顶盖片(1)之间套设有密封套(4)，所述第一电极(2)包括导电件(21)和焊接件(22)，所述焊接件(22)的顶部穿过所述顶盖片(1)固定于所述导电件(21)，所述焊接件(22)的底部通过下塑胶(5)固定于所述顶盖片(1)的底面。省去了注塑件，降低材料形变风险，同时，确保顶盖与电极之间的密封性能，有助于提高电芯安全性能。此外，还公开了一种电池顶盖结构的装配方法。

Description

一种电池顶盖结构及装配方法 技术领域
本发明属于电池生产制造的技术领域，具体涉及一种电池顶盖结构及装配方法。
背景技术
如今，随着现代社会的发展和人们环保意识的增强，越来越多的设备选择以锂电池作为电源，如手机、笔记本电脑、电动工具和电动汽车等等，这为锂电池的应用与发展提供了广阔的空间。其中，电动工具和电动汽车等所使用的锂电池一般称之为动力电池。顶盖极柱结构，一直被广泛使用于动力电池顶盖设置中，通常情况下，顶盖片设计有第一极柱通孔和第二极柱通孔，通过注塑件紧固于极柱、密封套于顶盖片上，实现电连接功能，
发明人发现现有方案至少还存在以下缺陷：顶盖极柱装配工序复杂，且注塑件失效风险大，会产生二次结晶和应力，导致注塑件形变，造成极柱漏气，从而降低电芯安全性能，甚至报废。
发明内容
本发明的目的在于：针对现有技术的不足，提供一种电池顶盖结构，省去了注塑件，降低材料形变风险，同时，确保顶盖与电极之间的密封性能，有助于提高电芯安全性能。
为了实现上述目的，本发明采用如下技术方案：
一种电池顶盖结构，包括顶盖片及设置在所述顶盖片的第一电极，所述第一电极和所述顶盖片之间套设有密封套，所述第一电极包括导电件和焊接件，所述焊接件的顶部穿过所述顶盖片固定于所述导电件，所述焊接件的底部通过下塑胶固定于所述顶盖片的底面。
作为本发明所述的一种电池顶盖结构的一种改进，所述导电件包括板本体及安装于所述板本体底部的凸座，所述焊接件包括环体及设置于所述环体的凸柱，所述凸柱的顶部设置有与所述凸座配合的焊接孔。
作为本发明所述的一种电池顶盖结构的一种改进，所述密封套包括套本体及设置于所述套本体底部的凸部，所述凸部设置有贯穿孔，所述贯穿孔的顶部形成有用于容置所述板本体的第一凹部，所述凸柱穿过所述贯穿孔插设于所述凸部。
作为本发明所述的一种电池顶盖结构的一种改进，所述环体的边缘向上延伸形成凸沿，所述下塑胶的底面设置有与所述凸沿配合的凹槽，所述凸座与所述板本体对应的一侧形成有外沿，所述外沿的外径等于所述板本体的外径。
作为本发明所述的一种电池顶盖结构的一种改进，所述密封套由氟塑胶注塑成型或氟橡胶模切成型，所述板本体和所述凸座采用铝或铜铝复合材料制成，所述凸座和所述焊接件均采用铜材料制成。
作为本发明所述的一种电池顶盖结构的一种改进，所述顶盖片形成有第二电极。
作为本发明所述的一种电池顶盖结构的一种改进，所述顶盖片设置有安装孔，所述安装孔的顶部形成有用于容置所述密封套的第二凹部，所述第二凹部的底面与所述密封套凹凸配合，所述安装孔的底部形成有用于容置所述下塑胶的第三凹部，所述第三凹部的底面与所述下塑胶凹凸配合。
作为本发明所述的一种电池顶盖结构的一种改进，所述下塑胶的表面设置有凸体，所述顶盖片设置有与所述凸体配合的凹体。
作为本发明所述的一种电池顶盖结构的一种改进，所述顶盖片上还设置有防爆阀透气孔和注液孔中的至少一种，所述顶盖片和所述下塑胶之间安装有防爆阀，所述防爆阀透气孔顶部安装有保护膜。
一种电池顶盖结构的装配方法，包括：
将下塑胶固定于顶盖片的底面，然后将焊接件的底部抵接于下塑胶的底面；
将焊接件的顶部依次穿过下塑胶、顶盖片及密封套焊接于导电件，确保第一电极紧固于顶盖片；
将电芯的负极耳焊接于第一电极，然后将电芯的正极耳焊接于第二电极。
需要说明的是，本发明的装配方法中，焊接件的底部通过下塑胶固定于顶盖片的底面，下塑胶起到绝缘焊接件和顶盖片的底面的作用，焊接件的底部则固定于顶盖片的底面，配合第一电极通过密封套紧固在顶盖片，相当于将第一电极的底部卡在顶盖片的底面，有助于提高第一电极和顶盖片之间的稳固性；将第一电极分成导电件和焊接件，便于将密封套套在第一电极上，省去了采用注塑工艺形成紧固极柱的注塑件，降低发生材料形变的概率；密封套4由氟塑胶注塑成型或氟橡胶模切成型，制成的装配件，具有良好电绝缘性能、高度的耐热性、耐油性、耐溶剂、耐磨性、耐湿性和耐低温性，有助于延长密封套的使用寿命。
本发明的有益效果在于，本发明包括顶盖片及设置在所述顶盖片的第一电极，所述第一电极和所述顶盖片之间套设有密封套，所述第一电极包括导电件和焊接件，所述焊接件的顶部穿过所述顶盖片固定于所述导电件，所述焊接件的底部通过下塑胶固定于所述顶盖片的底面。由于现有顶盖片设计有第一极柱和第二极柱通孔，通过注塑件紧固于极柱、密封套于顶盖片上，实现电连接功能，顶盖极柱装配工序复杂，且注塑件失效风险大，会产生二次结晶和应力，导致注塑件形变，造成极柱漏气，从而降低电芯安全性能，甚至报废，因此，将第一电极分成导电件和焊接件，便于将密封套套在第一电极上，并第一电极紧固在顶盖片，不仅起到顶盖片和第一电极之间的绝缘作用，还能确保顶盖片和第一电极之间的密闭性，同时，省去了采用注塑工艺形成紧固极柱的注塑件，降低发生材料形变的概率；焊接件的顶部穿过顶盖片固定于导电件，能够提高焊接件和导电件之间的稳固性，避免导电件从密封套中脱落，有助于提高电池 的安全性，同时，焊接件的底部通过下塑胶固定于顶盖片的底面，下塑胶起到绝缘焊接件和顶盖片的底面的作用，焊接件的底部则固定于顶盖片的底面，配合第一电极通过密封套紧固在顶盖片，相当于将第一电极的底部卡在顶盖片的底面，有助于提高第一电极和顶盖片之间的稳固性。本发明省去了注塑件，降低材料形变风险，同时，确保顶盖与电极之间的密封性能，有助于提高电芯安全性能。
附图说明
图1为本发明的结构示意图。
图2为本发明的分解示意图。
图3为本发明中第一电极安装后的剖面示意图。
图4为本发明中第一电极安装后的分解示意图。
图5为本发明中第二电极安装后的剖面示意图。
图6为本发明中密封套的结构示意图。
图7为本发明中焊接件的结构示意图。
其中：1-顶盖片；2-第一电极；3-第二电极；4-密封套；5-下塑胶；11-安装孔；13-防爆阀透气孔；14-注液孔；111-第二凹部；112-第三凹部；21-导电件；22-焊接件；211-板本体；212-凸座；221-环体；222-凸柱；2121-外沿；2211-凸沿；2221-焊接孔；41-套本体；42-凸部；421-贯穿孔；4211-第一凹部；51-凹槽；52-凸体；6-防爆阀；7-保护膜。
具体实施方式
如在说明书及权利要求当中使用了某些词汇来指称特定组件。本领域技术人员应可理解，硬件制造商可能会用不同名词来称呼同一个组件。本说明书及权利要求并不以名称的差异来作为区分组件的方式，而是以组件在功能上的差异来作为区分的准则。如在通篇说明书及权利要求当中所提及的“包含”为一开放式用语，故应解释成“包含但不限定于”。“大致”是指在可接受的误差 范围内，本领域技术人员能够在一定误差范围内解决技术问题，基本达到技术效果。
在本发明的描述中，需要理解的是，术语“上”、“下”、“前”、“后”、“左”、“右”、水平”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
以下结合附图1～7对本发明作进一步详细说明，但不作为对本发明的限定。
实施例1
一种电池顶盖结构，包括顶盖片1及设置在顶盖片1的第一电极2，第一电极2和顶盖片1之间套设有密封套4，第一电极2包括导电件21和焊接件22，焊接件22的顶部穿过顶盖片1固定于导电件21，焊接件22的底部通过下塑胶5固定于顶盖片1的底面。由于现有顶盖片设计有第一极柱和第二极柱通孔，通过注塑件紧固于极柱、密封套于顶盖片上，实现电连接功能，顶盖极柱装配工序复杂，且注塑件失效风险大，会产生二次结晶和应力，导致注塑件形变，造成极柱漏气，从而降低电芯安全性能，甚至报废，因此，将第一电极2分成导电件21和焊接件22，便于将密封套4套在第一电极2上，并第一电极2紧固在顶盖片1，不仅起到顶盖片1和第一电极2之间的绝缘作用，还能确保顶盖片1和第一电极2之间的密闭性，同时，省去了采用注塑工艺形成紧固极柱的注塑件，降低发生材料形变的概率；焊接件22的顶部穿过顶盖片1固定于导电件21， 能够提高焊接件22和导电件21之间的稳固性，避免导电件21从密封套4中脱落，有助于提高电池的安全性，同时，焊接件22的底部通过下塑胶5固定于顶盖片1的底面，下塑胶5起到绝缘焊接件22和顶盖片1的底面的作用，焊接件22的底部则固定于顶盖片1的底面，配合第一电极2通过密封套4紧固在顶盖片1，相当于将第一电极2的底部卡在顶盖片1的底面，有助于提高第一电极2和顶盖片1之间的稳固性；密封套4由氟塑胶注塑成型或氟橡胶模切成型，制成的装配件，具有良好电绝缘性能、高度的耐热性、耐油性、耐溶剂、耐磨性、耐湿性和耐低温性，有助于延长密封套4的使用寿命，从而提高电芯安全性能，相比包胶注塑工艺的注塑件，不仅便于拆卸和安装，还能够降低制造电池成本。
优选的，导电件21包括板本体211及安装于板本体211底部的凸座212，焊接件22包括环体221及设置于环体221的凸柱222，凸柱222的顶部设置有与凸座212配合的焊接孔2221。凸座212与焊接孔2221配合，便于将焊接件22嵌入到导电件21，不仅降低顶盖整体的厚度，减少侵占电池内部的空间，从而提高电池的能量密度，还便于对导电件21和焊接件22进行焊接，即沿着凸座212和焊接孔2221形成的间隙进行焊接，有助于降低导电件21和焊接件22的焊接成本，同时简化焊接工序，有助于提高装配效率；由于凸柱222为中空结构，向上凸起，且凸柱222的顶部设置与凸座212配合的焊接孔2221，凸柱222内形成用于容纳电芯极耳的空间，相比实心的凸柱222，能够避免焊接后的电芯极耳侵占电池内部的空间，有助于提高电池内部的空间利用率，从而提高电池的能量密度。
优选的，密封套4包括套本体41及设置于套本体41底部的凸部42，凸部42设置有贯穿孔421，贯穿孔421的顶部形成有用于容置板本体211的第一凹部4211，凸柱222穿过贯穿孔421插设于凸部42。在密封套4底部增加凸部42，并在凸部42设置贯穿孔421，能够将凸柱222嵌入到密封套4，即将焊接件22的顶部包围，起到焊接环与顶盖片1之间的绝缘作用，有助于减少密封套4与焊接件22之间的缝隙，从而提高密封套4与第一电极2之间的密闭性能；其中，密封套4上设置贯穿 孔，便于对导电件21和焊接件22进行焊接。
优选的，环体221的边缘向上延伸形成凸沿2211，下塑胶5的底面设置有与凸沿2211配合的凹槽51。凸沿2211和凹槽51凹凸配合，起到固定环体221的位置，从而固定焊接件22的位置，即将焊接件22的底部抵接于下塑胶5的底面，实现将第一电极2的底部卡在下塑胶5的底面，有助于提高顶盖片1和第一电极2之间的稳固性。
优选的，顶盖片1形成有第二电极3。第二电极3采用由顶盖片1一体成型或焊接的方式形成，于本实施例中，顶盖片1向上凸起形成凸包结构、凸块结构或其他凸起结构，只需满足顶盖片1对应第二电极3的位置向上凸起即可，但本发明不以此为限，第二电极3还可以为平面结构，即与顶盖片1的表面相平，有助于减少顶盖片1的高度，同时，省去了在顶盖片1上预留第二电极3的安装孔，不仅能够提高电池的密封性能、结构稳定性和安全性，而且能够降低制造成本，并省去极柱连接件所占空间，有利于缩小电池体积。
优选的，顶盖片1设置有安装孔11，安装孔11的顶部形成有用于容置密封套4的第二凹部111，第二凹部111的底面与密封套4凹凸配合，安装孔11的底部形成有用于容置下塑胶5的第三凹部112，第三凹部112的底面与下塑胶5凹凸配合。顶盖片1设置第二凹部111，能够将密封套4部分嵌入到顶盖片1上，防止密封套4发生水平方向的位移，有助于提高顶盖片1和密封套4之间的稳固性，还有助于降低顶盖结构整体的厚度，顶盖片1设置第三凹部112，有助于减少顶盖结构侵占电池内部的空间，有利于提高电池的能量密度，同时防止下塑胶5发生水平移动，能够提高顶盖片1和下塑胶5之间的稳固性。
优选的，顶盖片1上还设置有防爆阀透气孔13和注液孔14中的至少一种，顶盖片1和下塑胶5之间安装有防爆阀6，防爆阀透气孔13顶部安装有保护膜7。注液孔14便于将电解液注入到电池内部，防爆阀6能够在电池由于过充、过放、过流及电池内部短路导致电池内压上升时，使电池自动快速泄压，避免电池爆炸 导致安全事故的发生，保护膜7能够防止外界杂质进入到防爆阀6内，影响防爆阀6的功能。
本发明的工作原理是：
由于现有顶盖片设计有第一极柱和第二极柱通孔，通过注塑件紧固于极柱、密封套于顶盖片上，实现电连接功能，顶盖极柱装配工序复杂，且注塑件失效风险大，会产生二次结晶和应力，导致注塑件形变，造成极柱漏气，从而降低电芯安全性能，甚至报废，因此，将第一电极2分成导电件21和焊接件22，便于将密封套4套在第一电极2上，并第一电极2紧固在顶盖片1，不仅起到顶盖片1和第一电极2之间的绝缘作用，还能确保顶盖片1和第一电极2之间的密闭性，同时，省去了采用注塑工艺形成紧固极柱的注塑件，降低发生材料形变的概率；焊接件22的顶部穿过顶盖片1固定于导电件21，能够提高焊接件22和导电件21之间的稳固性，避免导电件21从密封套4中脱落，有助于提高电池的安全性，同时，焊接件22的底部通过下塑胶5固定于顶盖片1的底面，下塑胶5起到绝缘焊接件22和顶盖片1的底面的作用，焊接件22的底部则固定于顶盖片1的底面，配合第一电极2通过密封套4紧固在顶盖片1，相当于将第一电极2的底部卡在顶盖片1的底面，有助于提高第一电极2和顶盖片1之间的稳固性；其中，第二电极3采用由顶盖片1一体成型或焊接的方式形成，可采用向上凸起形成和不凸起形成的方式，无需在顶盖片1上预留第二电极3的安装孔，不仅能够提高电池的密封性能、结构稳定性和安全性，而且能够降低制造成本，并省去极柱连接件所占空间，有利于缩小电池体积；由于凸柱222为中空结构，向上凸起，且凸柱222的顶部设置与凸座212配合的焊接孔2221，凸柱222内形成用于容纳电芯极耳的空间，相比实心的凸柱222，能够避免焊接后的电芯极耳侵占电池内部的空间，有助于提高电池内部的空间利用率，从而提高电池的能量密度。
实施例2
与实施例1不同的是：本实施例的凸座212与板本体211对应的一侧形成有外 沿2121，外沿2121的外径等于板本体211的外径，密封套4由氟塑胶注塑成型或氟橡胶模切成型，板本体211和凸座212采用铝或铜铝复合材料制成，凸座212和焊接件22均采用铜材料制成，下塑胶5的表面设置有凸体52，顶盖片1设置有与凸体52配合的凹体。凸座212与板本体211对应的一侧设置外沿2121，有助于提高凸座212和板本体211的接触面积，减少导电件21的电阻，从而减少发热，有助于提高导电件21的过流能力和安全性；密封套4由氟塑胶注塑成型或氟橡胶模切成型，具有良好电绝缘性能、高度的耐热性、耐油性、耐溶剂、耐磨性、耐湿性和耐低温性，有助于延长密封套4的使用寿命；由于铝材料比铜材料的价格更低，当负极集流片为铜箔材料，凸座212和焊接件22均为负极集流片对应的材料，板本体211为铝材料，凸座212为铜材料，能够保证电池的质量不受影响，降低负极的生产成本；凸体52和凹体之间凹凸配合，有助于提高顶盖片1和下塑胶5之间的稳固性，凸体52也可以采用热熔柱，通过加热使热熔柱融化，相当于热熔柱完全融化于凹体，即实现下塑胶5和顶盖片1合为一体，减少铆接工序，简化电池制造工序和降低电池的生产成本，同时降低电池总体的质量，而且不影响电池的基本功能，还使电池内部能够放置更大的电芯，使得顶盖结构更加紧凑，提高电池空间利用率。
其他结构与实施例1相同，这里不再赘述。
实施例3
一种电池顶盖结构的装配方法，包括：
通过焊接或一体成型的方式，在顶盖片1上形成第二电极3；
将下塑胶5固定于顶盖片1的底面，使得下塑胶5表面的凸体52和顶盖片1的底面的凹体一一对应连接，然后将焊接件22的底部抵接于下塑胶5的底面，使得焊接件22的凸沿2211嵌入下塑胶5底面的凹槽51；
将焊接件22的顶部依次穿过下塑胶5、顶盖片1的安装孔11及密封套4的贯穿孔421焊接于导电件21，确保焊接件22的凸柱222插设于的凸部42，使得第一电 极2紧固于顶盖片1；
将电芯的负极耳焊接于第一电极2，然后将电芯的正极耳焊接于第二电极3。
需要说明的是，本发明的装配方法中，第二电极3采用由顶盖片1一体成型或焊接的方式形成，可采用向上凸起形成和不凸起形成的方式，无需在顶盖片1上预留第二电极3的安装孔，不仅能够提高电池的密封性能、结构稳定性和安全性，而且能够降低制造成本，并省去极柱连接件所占空间，有利于缩小电池体积；焊接件22的底部通过下塑胶5固定于顶盖片1的底面，下塑胶5起到绝缘焊接件22和顶盖片1的底面的作用，凸沿2211和凹槽51凹凸配合，起到固定环体221的位置，从而固定焊接件22的位置，即将焊接件22的底部抵接于下塑胶5的底面，实现将第一电极2的底部卡在下塑胶5的底面，有助于提高顶盖片1和第一电极2之间的稳固性；将第一电极2分成导电件21和焊接件22，便于将密封套4套在第一电极2上，省去了采用注塑工艺形成紧固极柱的注塑件，降低发生材料形变的概率，能够将凸柱222嵌入到密封套4，即将焊接件22的顶部包围，起到焊接环与顶盖片1之间的绝缘作用，有助于减少密封套4与焊接件22之间的缝隙，从而提高密封套4与第一电极2之间的密闭性能；此外，由于凸柱222为中空结构，向上凸起，且凸柱222的顶部设置与凸座212配合的焊接孔2221，凸柱222内形成用于容纳电芯极耳的空间，相比实心的凸柱222，能够避免焊接后的电芯极耳侵占电池内部的空间，有助于提高电池内部的空间利用率，从而提高电池的能量密度；密封套4由氟塑胶注塑成型或氟橡胶模切成型，制成的装配件，具有良好电绝缘性能、高度的耐热性、耐油性、耐溶剂、耐磨性、耐湿性和耐低温性，有助于延长密封套4的使用寿命。
根据上述说明书的揭示和教导，本发明所属领域的技术人员还能够对上述实施方式进行变更和修改。因此，本发明并不局限于上述的具体实施方式，凡是本领域技术人员在本发明的基础上所作出的任何显而易见的改进、替换或变型均属于本发明的保护范围。此外，尽管本说明书中使用了一些特定的术语， 但这些术语只是为了方便说明，并不对本发明构成任何限制。

Claims (10)

  1. 一种电池顶盖结构，其特征在于：包括顶盖片(1)及设置在所述顶盖片(1)的第一电极(2)，所述第一电极(2)和所述顶盖片(1)之间套设有密封套(4)，所述第一电极(2)包括导电件(21)和焊接件(22)，所述焊接件(22)的顶部穿过所述顶盖片(1)固定于所述导电件(21)，所述焊接件(22)的底部通过下塑胶(5)固定于所述顶盖片(1)的底面。
  2. 如权利要求1所述的一种电池顶盖结构，其特征在于：所述导电件(21)包括板本体(211)及安装于所述板本体(211)底部的凸座(212)，所述焊接件(22)包括环体(221)及设置于所述环体(221)的凸柱(222)，所述凸柱(222)的顶部设置有与所述凸座(212)配合的焊接孔(2221)。
  3. 如权利要求2所述的一种电池顶盖结构，其特征在于：所述密封套(4)包括套本体(41)及设置于所述套本体(41)底部的凸部(42)，所述凸部(42)设置有贯穿孔(421)，所述贯穿孔(421)的顶部形成有用于容置所述板本体(211)的第一凹部(4211)，所述凸柱(222)穿过所述贯穿孔(421)插设于所述凸部(42)。
  4. 如权利要求2所述的一种电池顶盖结构，其特征在于：所述环体(221)的边缘向上延伸形成凸沿(2211)，所述下塑胶(5)的底面设置有与所述凸沿(2211)配合的凹槽(51),所述凸座(212)与所述板本体(211)对应的一侧形成有外沿(2121)，所述外沿(2121)的外径等于所述板本体(211)的外径。
  5. 如权利要求2所述的一种电池顶盖结构，其特征在于：所述密封套(4)由氟塑胶注塑成型或氟橡胶模切成型，所述板本体(211)和所述凸座(212)采用铝或铜铝复合材料制成，所述凸座(212)和所述焊接件(22)均采用铜材料制成。
  6. 如权利要求1所述的一种电池顶盖结构，其特征在于：所述顶盖片(1)形成有第二电极(3)。
  7. 如权利要求1所述的一种电池顶盖结构，其特征在于：所述顶盖片(1)设 置有安装孔(11)，所述安装孔(11)的顶部形成有用于容置所述密封套(4)的第二凹部(111)，所述第二凹部(111)的底面与所述密封套(4)凹凸配合，所述安装孔(11)的底部形成有用于容置所述下塑胶(5)的第三凹部(112)，所述第三凹部(112)的底面与所述下塑胶(5)凹凸配合。
  8. 如权利要求1所述的一种电池顶盖结构，其特征在于：所述下塑胶(5)的表面设置有凸体(52)，所述顶盖片(1)设置有与所述凸体(52)配合的凹体。
  9. 如权利要求1所述的一种电池顶盖结构，其特征在于：所述顶盖片(1)上还设置有防爆阀透气孔(13)和注液孔(14)中的至少一种，所述顶盖片(1)和所述下塑胶(5)之间安装有防爆阀(6)，所述防爆阀透气孔(13)顶部安装有保护膜(7)。
  10. 一种电池顶盖结构的装配方法，其特征在于，包括：
    将下塑胶(5)固定于顶盖片(1)的底面，然后将焊接件(22)的底部抵接于下塑胶(5)的底面；
    将焊接件(22)的顶部依次穿过下塑胶(5)、顶盖片(1)及密封套(4)焊接于导电件(21)，确保第一电极(2)紧固于顶盖片(1)；
    将电芯的负极耳焊接于第一电极(2)，然后将电芯的正极耳焊接于第二电极(3)。
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116742225A (zh) * 2023-08-16 2023-09-12 深圳海辰储能控制技术有限公司 端盖组件、储能装置和用电设备
CN116922085A (zh) * 2023-09-05 2023-10-24 惠州亿恒特智能装备有限公司 方形盖板装配机
CN117497928A (zh) * 2023-12-29 2024-02-02 深圳海辰储能科技有限公司 端盖组件、储能装置和用电设备

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111244340A (zh) * 2020-03-10 2020-06-05 江苏塔菲尔新能源科技股份有限公司 一种电池顶盖结构及装配方法
WO2024020910A1 (zh) * 2022-07-28 2024-02-01 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置
CN115377619B (zh) * 2022-08-09 2024-04-16 合肥国轩高科动力能源有限公司 一种双侧出极耳的电池及装配方法
CN116780132B (zh) * 2023-08-16 2023-10-17 深圳海辰储能控制技术有限公司 下塑胶、端盖组件、储能装置及用电设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101562238A (zh) * 2008-04-17 2009-10-21 日立麦克赛尔株式会社 密封电池的制造方法
US20190067663A1 (en) * 2017-08-30 2019-02-28 Contemporary Amperex Technology Co., Limited Secondary battery and battery module
CN209880666U (zh) * 2019-06-27 2019-12-31 苏州美阅新能源有限公司 一种改进型汽车电池盖板
CN110718667A (zh) * 2018-07-12 2020-01-21 深圳市瑞德丰精密制造有限公司 导电极柱不脱落结构成型工艺、极柱结构及电池盖板
CN110854308A (zh) * 2019-12-24 2020-02-28 瑞浦能源有限公司 一种锂离子电池顶盖及锂离子电池
CN111244340A (zh) * 2020-03-10 2020-06-05 江苏塔菲尔新能源科技股份有限公司 一种电池顶盖结构及装配方法
CN211670219U (zh) * 2020-03-10 2020-10-13 江苏塔菲尔新能源科技股份有限公司 一种电池顶盖结构

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101562238A (zh) * 2008-04-17 2009-10-21 日立麦克赛尔株式会社 密封电池的制造方法
US20190067663A1 (en) * 2017-08-30 2019-02-28 Contemporary Amperex Technology Co., Limited Secondary battery and battery module
CN110718667A (zh) * 2018-07-12 2020-01-21 深圳市瑞德丰精密制造有限公司 导电极柱不脱落结构成型工艺、极柱结构及电池盖板
CN209880666U (zh) * 2019-06-27 2019-12-31 苏州美阅新能源有限公司 一种改进型汽车电池盖板
CN110854308A (zh) * 2019-12-24 2020-02-28 瑞浦能源有限公司 一种锂离子电池顶盖及锂离子电池
CN111244340A (zh) * 2020-03-10 2020-06-05 江苏塔菲尔新能源科技股份有限公司 一种电池顶盖结构及装配方法
CN211670219U (zh) * 2020-03-10 2020-10-13 江苏塔菲尔新能源科技股份有限公司 一种电池顶盖结构

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116742225A (zh) * 2023-08-16 2023-09-12 深圳海辰储能控制技术有限公司 端盖组件、储能装置和用电设备
CN116742225B (zh) * 2023-08-16 2023-10-13 深圳海辰储能控制技术有限公司 端盖组件、储能装置和用电设备
CN116922085A (zh) * 2023-09-05 2023-10-24 惠州亿恒特智能装备有限公司 方形盖板装配机
CN116922085B (zh) * 2023-09-05 2024-05-10 惠州亿恒特智能装备有限公司 方形盖板装配机
CN117497928A (zh) * 2023-12-29 2024-02-02 深圳海辰储能科技有限公司 端盖组件、储能装置和用电设备
CN117497928B (zh) * 2023-12-29 2024-03-19 深圳海辰储能科技有限公司 端盖组件、储能装置和用电设备

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