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WO2025066532A1 - Structure de borne polaire composite et structure de couvercle supérieur d'élément de batterie - Google Patents

Structure de borne polaire composite et structure de couvercle supérieur d'élément de batterie Download PDF

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Publication number
WO2025066532A1
WO2025066532A1 PCT/CN2024/109004 CN2024109004W WO2025066532A1 WO 2025066532 A1 WO2025066532 A1 WO 2025066532A1 CN 2024109004 W CN2024109004 W CN 2024109004W WO 2025066532 A1 WO2025066532 A1 WO 2025066532A1
Authority
WO
WIPO (PCT)
Prior art keywords
pole
composite
top cover
thread
protrusion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/109004
Other languages
English (en)
Chinese (zh)
Inventor
汪静
舒宽金
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eve Power Co Ltd
Huizhou Eve Power Co Ltd
Original Assignee
Eve Power Co Ltd
Huizhou Eve Power Co Ltd
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
Application filed by Eve Power Co Ltd, Huizhou Eve Power Co Ltd filed Critical Eve Power Co Ltd
Publication of WO2025066532A1 publication Critical patent/WO2025066532A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • 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

Definitions

  • the present application relates to the field of battery technology, and in particular to a composite pole structure and a battery cell top cover structure.
  • the manufacturing method of the copper-aluminum composite pole is to use a mold to stamp the copper-aluminum composite material into a copper-aluminum composite pole, or to weld a copper part and an aluminum part to obtain a copper-aluminum composite pole.
  • the cost of copper-aluminum composite materials is high, and the peel strength of copper-aluminum composite materials is low, which has the risk of composite failure; and the welding of copper and aluminum parts is prone to welding deformation and cracks at the welding interface, affecting the safety of the copper-aluminum composite pole.
  • the present application provides a composite pole structure, comprising a first pole and a second pole, wherein the first pole comprises a base and a protrusion located on the base; a groove is provided on a side of the second pole close to the first pole; wherein the protrusion is connected to the groove by a thread.
  • the present application further provides a battery cell top cover structure, including a top cover sheet, wherein the top cover sheet is provided with a pole hole, and the above-mentioned composite pole structure is arranged in the pole hole.
  • the composite pole structure provided by the present application specifically includes a first pole and a second pole, the first pole includes a base and a protrusion located on the base; a groove is provided on a side of the second pole close to the first pole; wherein the protrusion and the groove are connected by threads, thereby forming a composite pole structure by the first pole and the second pole connected by threads, thereby improving the pulling strength of the composite pole structure, reducing the risk of composite failure of the contact interface of the first pole and the second pole, and avoiding the problem of welding deformation, which can simplify the production process, improve production efficiency, and reduce production costs.
  • FIG1 is a schematic diagram of an embodiment of a battery cell top cover structure provided by an implementation of the present application.
  • FIG2 is a schematic diagram of an embodiment of a first pole of an implementation of the present application.
  • FIG3 is a cross-sectional schematic diagram of a first pole in an implementation of the present application.
  • FIG5 is a cross-sectional schematic diagram of a second pole according to an implementation of the present application.
  • an embodiment of the present application provides a composite pole structure and a battery cell top cover structure, in which a first pole and a second pole connected by threads form a composite pole structure, which improves the pulling strength of the composite pole structure, reduces the risk of composite failure at the contact interface of the first pole and the second pole, and avoids the problem of welding deformation. It can simplify the production process, improve production efficiency, and reduce production costs. For specific solutions, please refer to the following specific description.
  • battery module can be used interchangeably and can refer to any of a variety of different rechargeable battery chemistries and structures, including but not limited to lithium ion (e.g., lithium ion phosphate, lithium cobalt oxide, lithium iron phosphate, other lithium metal oxides, etc.), lithium ion polymer, nickel metal hydride, nickel cadmium, nickel metal hydride, nickel zinc, silver zinc or other battery types/structures.
  • lithium ion e.g., lithium ion phosphate, lithium cobalt oxide, lithium iron phosphate, other lithium metal oxides, etc.
  • lithium ion polymer e.g., nickel metal hydride, nickel cadmium, nickel metal hydride, nickel zinc, silver zinc or other battery types/structures.
  • electric vehicle is used here to refer to a fully electric vehicle, also known as an EV, a plug-in hybrid vehicle, also known as a PHEV, or a hybrid electric vehicle (HEV), wherein the hybrid vehicle uses multiple propulsion sources, one of which is an electric drive system.
  • a fully electric vehicle also known as an EV
  • a plug-in hybrid vehicle also known as a PHEV
  • HEV hybrid electric vehicle
  • Embodiments of the present application are generally applicable to systems using electric motors, and more specifically, but not exclusively, to electric vehicles using multiphase electric motors (e.g., inductive motors).
  • Electric vehicles use one or more stored energy sources such as battery packs to provide electrical energy to the vehicle. This energy is at least partially used to propel the vehicle.
  • the stored energy can also be used to provide energy required by other vehicle systems, such as vehicle lighting, vehicle partitionable heating, ventilation and air conditioning (HVAC) systems, auxiliary control systems (e.g., sensors, displays, navigation systems, etc.), vehicle entertainment systems (e.g., radio, DVD, MP3, etc.), etc.
  • Conventional electric vehicles include passenger vehicles and vehicles designed to transport goods, examples of which include passenger cars, trucks, electric bicycles, and recreational boats.
  • Electric vehicles also include dedicated work vehicles and carts, some of which can be integrated with forklifts, scissor lifts, lifting and/or articulated boom aerial work platforms, street cleaning systems, conveyor belts, and flatbed handling platforms.
  • FIG. 1 is a schematic diagram of an embodiment of a battery cell top cover structure provided in an embodiment of the present application.
  • the battery cell top cover structure specifically includes a top cover sheet 100, a pole hole 101 is provided on the top cover sheet 100, and a composite pole structure 200 is provided in the pole hole 101.
  • Figure 2 is a schematic diagram of an embodiment of the first pole 21 provided in an embodiment of the present application
  • Figure 3 is a cross-sectional schematic diagram of the first pole 21 provided in an embodiment of the present application
  • Figure 4 is a schematic diagram of an embodiment of the second pole 22 provided in an embodiment of the present application
  • Figure 5 is a cross-sectional schematic diagram of the second pole 22 provided in an embodiment of the present application.
  • the composite pole structure 200 includes a first pole 21 and a second pole 22, wherein the first pole 21 includes a base 211 and a protrusion 212 located on the base 211 (as shown in Figures 2 and 3); a groove 221 is provided on one side of the second pole 22 close to the first pole 21 (as shown in Figures 4 and 5); wherein the protrusion 212 is connected to the groove 221 by a thread (as shown in Figure 1).
  • the embodiment of the present application improves the pull-out strength of the composite pole structure 200 by threading the first pole 21 and the second pole 22 to form a composite pole structure 200, reduces the risk of composite failure of the contact interface between the first pole 21 and the second pole 22, and avoids the problem of welding deformation. It can simplify the production process, improve production efficiency, and reduce production costs.
  • the protrusion 212 includes an external thread 2120 located on the side, and the groove 221 includes an internal thread 2210 located on the side, and the internal thread 2210 and the external thread 2120 are meshed with each other.
  • the base 211 of the first pole 21 can be circular, square or other shapes, and the protrusion 212 of the first pole 21 is cylindrical.
  • the base 211 and the protrusion 212 of the first pole 21 are combined into a "hat" shape, that is, the surface area of the base 211 is larger than the bottom area of the protrusion 212, and the step formed between the base 211 and the protrusion 212 is used to receive the second pole 22, and the base 211 can be integrally formed with the protrusion 212.
  • the external thread 2120 located on the side of the protrusion 212 can extend from one end of the protrusion 212 close to the base 211 to the end of the protrusion 212 away from the base 211, that is, the external thread 2120 can cover the side of the protrusion 212.
  • the second pole 22 may be cylindrical or in other shapes.
  • a groove 221 is provided at the bottom of the second pole 22. Since the groove 221 needs to be assembled with the protrusion 212 of the first pole 21, the shape of the groove 221 is the same as that of the protrusion 212.
  • the internal thread 2210 located on the side of the groove 221 may extend from the bottom surface of the second pole 22 to the bottom of the groove 221, that is, the internal thread 2210 may cover the side of the groove 221.
  • the specifications of the internal thread 2210 need to be consistent with the specifications of the external thread 2120, for example, the nominal diameter, tooth profile, pitch, etc. of the internal thread 2210 should be consistent with those of the external thread 2120.
  • the composite pole structure 200 formed after assembly is in a "hat" shape as a whole.
  • the composite pole structure 200 provided in the embodiment of the present application is used for assembly, which can simplify the production process, improve production efficiency, and reduce production costs.
  • the tooth profile of the external thread 2120 is any one of a triangular thread, a trapezoidal thread, a rectangular thread, and a serrated thread.
  • the thread in the embodiment of the present application refers to a continuous raised portion with a specific cross-section and a spiral shape made on the surface of a cylinder. Threads are divided into triangular threads, trapezoidal threads, rectangular threads, sawtooth threads and other special-shaped threads according to their cross-sectional shape (i.e., tooth profile). Specifically, if the cross section of the thread is triangular, it is a triangular thread; if the cross section is trapezoidal, it is a trapezoidal thread; if the cross section is rectangular, it is a rectangular thread; if the cross section is sawtooth, it is a sawtooth thread.
  • the pitch of the external thread 2120 is fine. It can be understood that in the embodiments of the present application, by selecting fine pitch for both the external thread 2120 and the internal thread 2210, the helix angle is smaller, which is more conducive to self-locking of the thread and can prevent loosening, and the fine pitch thread has a small pitch, which can play a role in fine adjustment.
  • a thread locker is provided in the meshing area between the internal thread 2210 and the external thread 2120.
  • the thread locker is specifically a modified conductive thread locker, and the embodiment of the present application can prevent the first pole 21 and the second pole 22 from loosening due to vibration and impact by applying the thread locker to the thread meshing area between the first pole 21 and the second pole 22.
  • the depth h2 of the groove 221 is greater than or equal to 0.6 times the height H of the second pole 22, and less than or equal to 0.8 times the height H of the second pole 22; in a direction parallel to the plane where the base 211 is located, the diameter d2 of the groove 221 is greater than or equal to 0.5 times the width D of the second pole 22, and less than or equal to 0.8 times the width D of the second pole 22.
  • the groove 221 within this size range can better nest with the protrusion 212 of the first pole 21 and maintain its own strength and rigidity.
  • the height h1 of the protrusion 212 is greater than or equal to 0.6 times the height H of the second pole 22, and less than or equal to 0.8 times the height H of the second pole 22; in a direction parallel to the plane where the base 211 is located, the diameter d1 of the protrusion 212 is greater than or equal to 0.5 times the width D of the second pole 22, and less than or equal to 0.8 times the width D of the second pole 22.
  • the height h1 range and the diameter d1 range of the protrusion 212 correspond to the depth h2 range and the diameter d2 range of the groove 221.
  • the diameter d1 of the protrusion 212 must meet the condition of mutual engagement with the groove 221; and the height h1 of the protrusion 212 can be greater than the depth h2 of the groove 221, or smaller than the depth h2 of the groove 221, or equal to the depth h2 of the groove 221, as long as there is an engagement area between the protrusion 212 and the groove 221.
  • the first pole 21 is a copper column
  • the second pole 22 is an aluminum column. It should be noted that the present application is not limited thereto, and the embodiments of the present application can also be applied to other composite material structures, that is, the first pole 21 and the second pole 22 are composite structures using different materials.
  • the battery cell top cover structure also includes a terminal block 300, a lower plastic 400 and a sealing ring 500; the terminal block 300 is located on the top cover sheet 100; the lower plastic 400 is located between the terminal block 300 and the top cover sheet 100; the sealing ring 500 is located in the gap between the top cover sheet 100 and the composite pole structure 200.

Landscapes

  • 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)

Abstract

L'invention concerne une structure de borne polaire composite (200) et une structure de couvercle supérieur d'élément de batterie. La structure de borne polaire composite (200) comprend spécifiquement une première borne polaire (21) et une seconde borne polaire (22) ; la première borne polaire (21) comprend une base (211) et une saillie (212) située sur la base (211) ; une rainure (221) est disposée sur le côté de la seconde borne polaire (22) à proximité de la première borne polaire (21), la saillie (212) étant en liaison filetée avec la rainure (221).
PCT/CN2024/109004 2023-09-28 2024-07-31 Structure de borne polaire composite et structure de couvercle supérieur d'élément de batterie Pending WO2025066532A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202322678064.4U CN221353117U (zh) 2023-09-28 2023-09-28 复合极柱结构及电芯顶盖结构
CN202322678064.4 2023-09-28

Publications (1)

Publication Number Publication Date
WO2025066532A1 true WO2025066532A1 (fr) 2025-04-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2024/109004 Pending WO2025066532A1 (fr) 2023-09-28 2024-07-31 Structure de borne polaire composite et structure de couvercle supérieur d'élément de batterie

Country Status (2)

Country Link
CN (1) CN221353117U (fr)
WO (1) WO2025066532A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN221353117U (zh) * 2023-09-28 2024-07-16 惠州亿纬动力电池有限公司 复合极柱结构及电芯顶盖结构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014093127A (ja) * 2012-10-31 2014-05-19 Sanyo Electric Co Ltd 電池とその製造方法
CN206250269U (zh) * 2016-11-30 2017-06-13 东莞塔菲尔新能源科技有限公司 一种动力电池复合极柱的装配结构
CN213782211U (zh) * 2020-09-11 2021-07-23 武汉富航精密工业有限公司 一种新型锂电池复合极柱
CN218472230U (zh) * 2022-06-27 2023-02-10 上海兰钧新能源科技有限公司 一种负极柱螺纹二次电芯顶盖结构
CN221353117U (zh) * 2023-09-28 2024-07-16 惠州亿纬动力电池有限公司 复合极柱结构及电芯顶盖结构

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014093127A (ja) * 2012-10-31 2014-05-19 Sanyo Electric Co Ltd 電池とその製造方法
CN206250269U (zh) * 2016-11-30 2017-06-13 东莞塔菲尔新能源科技有限公司 一种动力电池复合极柱的装配结构
CN213782211U (zh) * 2020-09-11 2021-07-23 武汉富航精密工业有限公司 一种新型锂电池复合极柱
CN218472230U (zh) * 2022-06-27 2023-02-10 上海兰钧新能源科技有限公司 一种负极柱螺纹二次电芯顶盖结构
CN221353117U (zh) * 2023-09-28 2024-07-16 惠州亿纬动力电池有限公司 复合极柱结构及电芯顶盖结构

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CN221353117U (zh) 2024-07-16

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