WO2023185501A1 - Batterie cylindrique à haute densité d'énergie et son procédé d'assemblage - Google Patents

Batterie cylindrique à haute densité d'énergie et son procédé d'assemblage Download PDF

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Publication number
WO2023185501A1
WO2023185501A1 PCT/CN2023/082060 CN2023082060W WO2023185501A1 WO 2023185501 A1 WO2023185501 A1 WO 2023185501A1 CN 2023082060 W CN2023082060 W CN 2023082060W WO 2023185501 A1 WO2023185501 A1 WO 2023185501A1
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WO
WIPO (PCT)
Prior art keywords
pole
manifold
cylindrical battery
busbar
welded
Prior art date
Application number
PCT/CN2023/082060
Other languages
English (en)
Chinese (zh)
Inventor
冯树南
王举
郭春泰
何伟
杨益志
罗朝晖
Original Assignee
蓝京新能源(嘉兴)有限公司
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Filing date
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Application filed by 蓝京新能源(嘉兴)有限公司 filed Critical 蓝京新能源(嘉兴)有限公司
Publication of WO2023185501A1 publication Critical patent/WO2023185501A1/fr

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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
    • H01M50/50—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H01M10/0409—Machines for assembling batteries for cells with wound electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0422—Cells or battery with cylindrical casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • 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 power batteries, and in particular relates to a high-energy-density cylindrical battery and its assembly process.
  • the traditional cylindrical battery cover has a complex structure; the cap serves as the positive electrode and the casing serves as the negative electrode.
  • the positive and negative electrodes are conductively connected from both ends of the cylindrical battery, which is inconvenient for the design and welding of the external module bus; in addition, due to the Fewer poles affect the power performance of the battery.
  • the busbar and the core are welded, they are then sealed with the cover using a roll groove method.
  • the roll groove position requires at least 2 to 3 mm of space, which reduces the space utilization and energy density of the battery core. After the battery core diameter increases, it becomes easier to use during use. Movement affects the welding points, leading to weak welding and affecting performance and service life.
  • the present invention aims to propose a high energy density cylindrical battery to increase the energy density of the battery core.
  • a high-energy-density cylindrical battery includes a shell assembly.
  • the shell in the shell assembly is provided with an insulator, a No. 2 manifold, a winding core, a No. 1 manifold and a cover plate from bottom to top.
  • the insulator makes the No. 2
  • the busbar and the shell are insulated.
  • One side of the core is welded to the No. 1 busbar, the other side is welded to the No. 2 busbar.
  • the bottom of the No. 2 busbar is integrally welded to the pole, and the top of the pole is welded to the bottom of the shell. Riveting, the bottom is installed with a cap; the top of the No. 1 manifold is integrally welded with the shell and cover plate.
  • the bottom of the housing is provided with explosion-proof notches.
  • pole through hole is provided in the middle of the pole, and pole steps are provided on the inner wall of the pole through hole.
  • the pole and the housing are made of the same material
  • the pole through hole includes an upper part and a lower part of an integrated structure
  • the upper part is a rounded truncated cone structure
  • the lower part is a cylindrical structure
  • the inner diameter of the cylinder is larger than the small diameter of the truncated cone
  • the junction of the upper part and the lower part forms a pole step.
  • the pole and the housing are made of the same material
  • the pole through hole includes an upper part and a lower part of an integrated structure
  • the upper part is a rounded truncated cone structure
  • the lower part is a cylindrical structure
  • the inner diameter of the cylinder is larger than the small diameter of the truncated cone
  • a pole step is provided above the lower part, and the pole step is a two-step step.
  • the pole through hole includes an upper part and a lower part of an integrated structure, the upper part and the lower part are both cylindrical structures, and the inner diameter of the lower cylinder is larger than the inner diameter of the upper cylinder, and a pole step is formed at the junction of the upper part and the lower part;
  • the material of the column is composite material, the material of the upper part is the same as the material of the manifold, and the material of the lower part is the same as the material of the shell.
  • the surface of the No. 1 manifold plate is uneven.
  • a number of welded parts are evenly distributed in the circumferential direction of the No. 1 manifold plate to form a multi-lobed shape.
  • the platform has a flanging platform at its edge, and the direction of the flanging platform is opposite to that of the manifold boss.
  • the surface of the No. 2 manifold is uneven, a number of elastic structures are evenly distributed in the circumferential direction of the No. 2 manifold, a welding boss is provided between two adjacent elastic structures, and a central boss is provided in the middle of the No. 2 manifold, and The direction of the center boss is opposite to that of the weld boss.
  • the high energy density cylindrical battery of the present invention has the following advantages:
  • the high-energy-density cylindrical battery of the present invention adopts the form of riveting pole posts of the shell, welding the cover plate and the periphery of the shell, which increases the use space of the internal winding core, increases the capacity of the battery core, and improves the efficiency of the battery core. energy density.
  • the high-energy-density cylindrical battery of the present invention has a compact structure, high energy density, strong overcurrent capability, and is suitable for high-rate charging and discharging.
  • the No. 1 busbar is in direct contact with the cover plate, which is beneficial to heat dissipation and facilitates high-power use of the battery core.
  • Another object of the present invention is to propose an assembly process for high energy density cylindrical batteries to simplify the process complexity and improve work efficiency.
  • An assembly process for high energy density cylindrical batteries includes the following steps:
  • the core tabs and the No. 1 manifold are laser welded to form the core assembly
  • the assembly process of the high-energy-density cylindrical battery of the present invention has the following advantages:
  • the pole is a middle step through hole, and the pole step is used for the integral welding of the No. 2 busbar and the pole, or the No. 2 busbar,
  • the poles and the central structural member are welded together to achieve the conductive function.
  • the welding quality is better controlled than penetration welding, which greatly improves work efficiency.
  • the manifold plate, cover plate and casing have a matching structure.
  • the manifold plate, cover plate and casing are welded together through laser peripheral welding to achieve sealing.
  • conductive connection function while reducing one welding, reducing costs and improving efficiency.
  • Figure 1 is an exploded view of a high energy density cylindrical battery according to an embodiment of the present invention
  • Figure 2 is a cross-sectional view of a high energy density cylindrical battery according to an embodiment of the present invention.
  • Figure 3 is an enlarged view of part A in Figure 2;
  • Figure 4 is an enlarged view of part B in Figure 2;
  • FIG. 5 is a schematic diagram of the housing assembly according to the embodiment of the present invention.
  • Figure 6 is a second schematic view of the housing assembly according to the embodiment of the present invention.
  • Figure 7 is a cross-sectional view of the pole Embodiment 1 according to the embodiment of the present invention.
  • Figure 8 is a cross-sectional view of the pole Embodiment 2 according to the embodiment of the present invention.
  • Figure 9 is a cross-sectional view of the pole Embodiment 3 according to the embodiment of the present invention.
  • Figure 10 is a schematic diagram of a multi-pole winding core according to an embodiment of the present invention.
  • Figure 11 is a schematic diagram of a cut and stacked pole tab winding core according to an embodiment of the present invention.
  • Figure 12 is a schematic diagram of an all-pole tab winding core according to an embodiment of the present invention.
  • Figure 13 is a schematic diagram of the No. 1 manifold according to the embodiment of the present invention.
  • Figure 14 is a cross-sectional view along the line A-A in Figure 13;
  • Figure 15 is a schematic diagram of the No. 2 manifold according to the embodiment of the present invention.
  • Figure 16 is a cross-sectional view of Figure 15;
  • Figure 17 is a schematic diagram 2 of the No. 2 manifold according to the embodiment of the present invention.
  • Figure 18 is a schematic diagram of the cover plate according to the embodiment of the present invention.
  • Figure 19 is a schematic diagram of a cap according to an embodiment of the present invention.
  • connection should be understood in a broad sense.
  • connection or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components.
  • a high-energy-density cylindrical battery as shown in Figures 1 to 19, includes a housing assembly 2 including a housing 21.
  • the housing 21 is provided with an insulating member 24, a No. 2 manifold 4, a winding core 1, and The No. 1 manifold 3 and the cover plate 5, the insulator 24 is used to isolate the insulation between the No. 2 manifold 4 and the shell 21.
  • One side of the core 1 is welded to the No. 1 manifold 3, and the other side is welded to the No. 2 manifold.
  • the plate 4 is welded, the lower part of the No. 2 manifold plate 4 is integrally welded to the pole 22, the upper part of the pole 22 is riveted to the bottom of the housing 21, and the cap 6 is installed below.
  • the upper part of the No. 1 manifold plate 3 is integrally welded to the shell 21 and the cover plate 5.
  • the battery of the present application has a compact structure, high energy density, strong overcurrent capability, is suitable for high-rate charging and discharging, is simple to assemble, and has low manufacturing cost.
  • the positive and negative electrodes of the battery can be located on the same side, which facilitates bus design and welding of external modules or systems.
  • the insulating member 24 is an insulating ring.
  • the housing 21 is a steel shell and the material of the pole 22 is aluminum
  • the pole 22 is the positive pole
  • the second busbar 4 is the positive busbar
  • the No.1 busbar 3 is the negative busbar.
  • the material of the pole 22 is copper, nickel-plated copper, nickel-plated steel or copper-aluminum composite. Then the pole 22 is the negative electrode, the second busbar 4 is the negative busbar, and the No.1 busbar 3 is the positive busbar.
  • the core 1 is one of a full-lug core, a cut-and-stacked lug core, or a multi-lug core.
  • the housing assembly 2 includes a housing 21, a pole 22 and an insulator 24.
  • the housing 21 is a cylindrical structure with one side open.
  • a boss is provided at the opening edge of the housing 21.
  • An insulating member 24 is placed inside the bottom of 21, and the bottom of the housing 21 is riveted to the pole 22.
  • the bottom of the housing 21 is provided with a housing explosion-proof score 23 , and the housing explosion-proof score 23 is located on one side of the pole 22 to play an explosion-proof role.
  • a pole through hole 221 is provided in the middle of the pole 22 , and a pole step 222 is provided on the inner wall of the pole through hole 221 .
  • the pole step 222 close to the housing 21 is used for welding the No. 2 manifold 4 and the pole 22 .
  • the pole 22 is made of aluminum
  • the housing 21 is a steel shell
  • the pole through hole 221 includes an upper part and a lower part of an integrated structure
  • the upper part is a truncated cone structure
  • the lower part is a cylindrical structure.
  • the inner diameter of the cylinder is larger than the smaller diameter of the truncated cone; the junction of the upper part and the lower part forms a pole step 222.
  • the upper part is convenient for inserting the No. 2 manifold 4 for laser welding, and the lower part is used for welding with the cap 6 and for sealing after liquid injection or formation; the pole step 222 serves as a limiter.
  • the upper structure facilitates the insertion of the boss and the hollow structural member 7 of the No. 2 busbar 4 into the pole through hole 221.
  • the pole 22 is made of aluminum, and the housing 21 is a steel shell.
  • the bottom of the housing 21 is provided with a housing explosion-proof notch 23.
  • the pole through hole 221 includes the upper and lower parts of the integrated structure. Both the upper part and the lower part are cylindrical structures, and the inner diameter of the cylinder is larger than the smaller diameter of the truncated cone; a pole step 222 is provided above the lower part, and the pole step 222 is a two-step step.
  • the upper part is convenient for inserting the No. 2 manifold 4 for laser welding, and the lower part is used for welding with the cap 6 and for sealing after liquid injection or formation; the pole step 222 serves as a limiter.
  • pole through hole 221 includes an upper part and a lower part of an integrated structure.
  • the upper part and the lower part are both cylindrical structures, and the inner diameter of the lower cylinder is larger than the inner diameter of the upper cylinder.
  • the upper part is convenient for inserting the No. 2 manifold 4.
  • the lower part is used for welding with the cap 6, and the pole step 222 is formed at the junction of the upper and lower parts; the material of the upper part is the same as that of the manifold 4, and the material of the lower part is the same as the material of the housing 21.
  • the lower part of the pole 22 is made of the same material as the housing 21, which facilitates busbar design and welding of the module or system.
  • the surface of the No. 1 busbar 3 is uneven.
  • a number of welded portions 31 are evenly distributed in the circumferential direction of the No. 1 busbar 3 to form a multi-lobed shape.
  • a gap 32 is provided outside each welded portion 31.
  • the slit 32 is used to penetrate the electrolyte; the No. 1 busbar 3 has an uneven surface.
  • the converging plate boss 34 matches the central hole of the core 1 for positioning.
  • There is a flanging platform 33 at the edge of the No. 1 converging disk 3, and the flanging platform 33 The direction is opposite to the direction of the manifold boss 34, and the flange platform 33 is used to cooperate with the opening of the housing 21.
  • the welding part 31 is punched and formed by the No. 1 manifold 3, and the welding part 31 is used for welding with the tabs of the winding core. After the No. 1 manifold 3 is welded to the winding core, the outer ring and the winding core have a small amount of mobility in the axial direction of the winding core, so as to facilitate matching with the housing 22 and the cover plate 5 .
  • the cross section of the flanging platform 33 is L-shaped or I-shaped.
  • No. 2 manifold 4 The surface of No. 2 manifold 4 is uneven.
  • a number of elastic structures 43 are evenly distributed in the circumferential direction of No. 2 manifold 4.
  • the welding boss 41 is pressed against the winding core lug for laser welding.
  • the central boss 42 can be inserted into the pole through hole 221 of the pole 22. , the central boss 42 cooperates with the pole step 222 for welding. In order to cooperate with the pole through hole 221, the central boss 42 can be set in a trapezoidal shape to facilitate installation.
  • the elastic structure 43 is used to absorb assembly tolerances and compress the winding core so that it does not move during use.
  • a hollow structural member 7 is added and inserted into the central boss 42.
  • the hollow structural member 7 can be higher than the plane of the second manifold 4 and the winding core 1 is inserted for positioning.
  • the hollow structural member 7 is cylindrical or T-shaped.
  • Type hollow structure, in order to cooperate with the pole 22 and the second bus plate 4, the shape of the cylindrical or T-shaped structural member may be a trapezoidal structure.
  • the elastic structure 43 and the No. 2 manifold 4 are an integrated structure, obtained by punching, bending and shaping.
  • the elastic structure 43 is used to compress the winding core assembly to prevent the winding core from moving and pulling on the tabs during use, causing adverse effects on the connection. Cell performance and life.
  • the elastic structure 43 is a polygonal structure with an inner opening and a flat top.
  • the inner opening allows the elastic structure 43 to have enough space during the compression process, which can effectively save space.
  • the cross-section of the elastic structure 43 is an S-shaped structure, and the outer side is the movable side. When being squeezed, the outer side can extend outward. Both sides of the elastic structure 43 are flat, which is convenient. Cooperate with the components on both sides of No. 2 manifold 4 to ensure the stability of installation.
  • the cover plate 5 has a disk structure, and a cover plate step 52 is provided at the edge.
  • the cover plate step 52 is used to cooperate with the housing 21.
  • the cover plate explosion-proof notch 51 can be added to the center of the cover plate 5 as needed for explosion-proofing at the bottom. and exhaust.
  • the cap 6 is a disc structure. In order to facilitate assembly, the assembly side can be chamfered or beveled.
  • An assembly process of a high energy density cylindrical battery requires placing the case components in advance, that is, after riveting the poles 22 and the case 21, place the insulating member 24 inside the case 21, and then perform the following steps:
  • the core tabs and the No. 1 manifold 3 are laser welded to form the core assembly;
  • the cover plate 5 and the casing 21 are laser peripherally welded.
  • the casing 21, the cover plate 5 and the No. 1 manifold 3 are directly welded together at one time (X in Figure 3) to achieve electrical and thermal conductivity functions and save money.
  • One-time welding improves efficiency and reduces costs;

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

La présente invention concerne une batterie cylindrique à haute densité d'énergie et son procédé d'assemblage. La batterie cylindrique à haute densité d'énergie comprend un ensemble coque, et une coque dans l'ensemble coque est disposée séquentiellement, de bas en haut, avec un isolateur, un second collecteur de courant, un "jelly roll", un premier collecteur de courant et une plaque de couvercle, l'isolateur isolant le second collecteur de courant de la coque ; un côté du "jelly roll" est soudé au premier collecteur de courant, et l'autre côté de celui-ci est soudé au second collecteur de courant ; le côté inférieur du second collecteur de courant est soudé d'un seul tenant à un poteau ; le côté supérieur du poteau est riveté au fond de la coque, et un capuchon est monté sur le côté inférieur du poteau ; et le côté supérieur du premier collecteur de courant est soudé d'un seul tenant à la coque et à la plaque de couvercle. Au moyen de la batterie cylindrique à haute densité d'énergie et son procédé d'assemblage, l'espace disponible pour un "jelly roll" interne est augmenté, la capacité d'un élément de batterie est augmentée, et la densité d'énergie de l'élément de batterie est améliorée. De plus, les coûts de production sont réduits, et l'efficacité de travail est améliorée.
PCT/CN2023/082060 2022-03-28 2023-03-17 Batterie cylindrique à haute densité d'énergie et son procédé d'assemblage WO2023185501A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210310709.6A CN114628866A (zh) 2022-03-28 2022-03-28 一种高能量密度圆柱型电池及其组装工艺
CN202210310709.6 2022-03-28

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WO2023185501A1 true WO2023185501A1 (fr) 2023-10-05

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CN114628866A (zh) * 2022-03-28 2022-06-14 蓝京新能源(嘉兴)有限公司 一种高能量密度圆柱型电池及其组装工艺
CN218182424U (zh) * 2022-06-22 2022-12-30 宁德时代新能源科技股份有限公司 电池单体、电池及用电装置
CN115117524A (zh) * 2022-07-04 2022-09-27 中创新航科技股份有限公司 电池及电池的制造方法
CN114899415B (zh) * 2022-07-13 2023-03-21 楚能新能源股份有限公司 集流盘组件、圆柱型锂离子电池及装配工艺
CN115395145A (zh) * 2022-08-08 2022-11-25 蓝京新能源(嘉兴)有限公司 一种圆柱型电池
CN218039702U (zh) * 2022-08-11 2022-12-13 湖北亿纬动力有限公司 一种集流盘及电池
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