WO2021073200A1 - 二次电池、电池模块、电池组、装置及制造方法 - Google Patents

二次电池、电池模块、电池组、装置及制造方法 Download PDF

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Publication number
WO2021073200A1
WO2021073200A1 PCT/CN2020/105867 CN2020105867W WO2021073200A1 WO 2021073200 A1 WO2021073200 A1 WO 2021073200A1 CN 2020105867 W CN2020105867 W CN 2020105867W WO 2021073200 A1 WO2021073200 A1 WO 2021073200A1
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WIPO (PCT)
Prior art keywords
cover plate
secondary battery
relief hole
plate
tab
Prior art date
Application number
PCT/CN2020/105867
Other languages
English (en)
French (fr)
Inventor
陈雷
Original Assignee
宁德时代新能源科技股份有限公司
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Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to JP2022520899A priority Critical patent/JP7477604B2/ja
Priority to EP20827973.7A priority patent/EP3836297B1/en
Priority to US17/056,049 priority patent/US11837736B2/en
Priority to KR1020227011343A priority patent/KR102549509B1/ko
Publication of WO2021073200A1 publication Critical patent/WO2021073200A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/154—Lid or cover comprising an axial bore for receiving a central current collector
    • 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
    • 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
    • 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
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like 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
    • H01M10/0431—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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/049—Processes for forming or storing electrodes in the battery container
    • 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
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • H01M50/147—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
    • H01M50/186—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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • 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
    • H01M50/543—Terminals
    • H01M50/545—Terminals formed by the casing of 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
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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

  • This application relates to the technical field of energy storage equipment, and in particular to a secondary battery, a battery module, a battery pack, a device, and a manufacturing method.
  • a secondary battery in order to increase the energy density of the secondary battery, as much active material as possible is usually contained in the casing to improve the space utilization rate inside the casing.
  • a secondary battery usually includes a casing, a cover plate, an electrode unit, and an electrode terminal. The casing and the cover plate are hermetically connected.
  • the electrode unit is located in the casing and includes a main body and tabs extending from the main body. The tabs pass through other mechanical parts.
  • a piece (such as an adapter piece) is electrically connected to the electrode terminal.
  • This application provides a secondary battery, a battery module, a battery pack, a device, and a manufacturing method, aiming to improve the energy density of the secondary battery.
  • the embodiment of the first aspect of the present application provides a secondary battery, including: an electrode unit, including a main body, and first and second tabs extending from the main body; and a casing having a housing for accommodating the main body.
  • the outer surface of the first cover facing away from the accommodating cavity is recessed toward the accommodating cavity and forms a first recess
  • the first recess has a bottom plate
  • the first relief hole is located on the bottom plate along the thickness direction of the secondary battery One side
  • the first tab has a connecting part and a fixing part.
  • the fixing part is located in the first recess and connected to the bottom plate.
  • the connecting part is bent relative to the fixing part and passes through the first relief hole.
  • first relief holes there are two first relief holes, and the two first relief holes are located on both sides of the bottom plate in the thickness direction;
  • the number of electrode units is two, and the two electrode units are arranged side by side in the thickness direction, and the respective first tabs of the two electrode units pass through the two first relief holes respectively, and the fixing parts of the two first tabs are along the Extend and shape in mutually approaching directions.
  • the first cover plate has an inner surface facing the accommodating cavity, and the bottom plate protrudes from the inner surface in a direction facing the accommodating cavity.
  • the first recess has a first segment and a second segment successively distributed in the height direction of the secondary battery, the first segment is located on the side of the second segment away from the accommodating cavity, and the second segment The orthographic projection in the height direction is located within the orthographic projection of the first segment in the height direction;
  • At least part of the fixing part is accommodated in the second section, and the sealing plate is accommodated in the first section.
  • the first recess has a first side wall facing the first section and a second side wall facing the second section, the first side wall and the second side wall are connected to each other by a transition portion, and the sealing plate is located at the transition portion The side facing away from the cavity.
  • the edge of the sealing plate has a welding area, and the inner surface of the first cover plate facing the accommodating cavity is provided with a reinforcing strip;
  • the orthographic projection of the reinforcing bar in the height direction of the electrode unit covers the orthographic projection of the welding area in the height direction.
  • the isolating plate is located between the first cover and the main body, the isolating plate is provided with a second relief hole through which the first tab passes through the first relief Hole and second give way hole.
  • the orthographic projections of the second relief hole and the first relief hole in the height direction of the electrode unit at least partially overlap.
  • the isolation plate has a first surface facing the first cover plate and a second surface facing the main body.
  • the first surface is recessed toward the second surface and forms a second recess, and at least part of the bottom plate is located in the second recess.
  • the secondary battery further includes a first electrode terminal electrically connected to the first tab and a second electrode terminal electrically connected to the second tab.
  • the first electrode terminal is electrically connected to the first cover plate and the housing,
  • the second electrode terminal is insulated from the first cover plate and the housing.
  • the secondary battery further includes a second cover plate
  • the housing has a second opening communicating with the accommodating cavity, and the second opening and the first opening are respectively located at two ends of the housing along the height direction of the secondary battery.
  • the cover plate is arranged at the second opening, the first electrode terminal and the second electrode terminal are both arranged on the second cover plate, and the first tab passes through the first cover plate, the housing, the second cover plate and the first electrode in sequence
  • the terminals are electrically connected, and the second tab is insulated from the second cover plate.
  • the embodiment of the second aspect of the present application further provides a battery module, including a frame of a plurality of the above-mentioned secondary batteries, and the plurality of secondary batteries are arranged side by side in the frame.
  • the embodiment of the third aspect of the present application also provides a battery pack, including a box and the above-mentioned secondary battery located in the box.
  • the embodiment of the fourth aspect of the present application also provides a device using a secondary battery as a power source, which includes a receiving portion and a plurality of the above-mentioned secondary batteries located in the receiving portion.
  • the embodiment of the fifth aspect of the present application also provides a method for manufacturing a secondary battery, including:
  • the electrode unit is arranged in the housing cavity of the housing.
  • the electrode unit includes a main body and first and second tabs extending from the main body.
  • the housing has a first terminal communicating with the housing. Opening so that the first tab faces the first opening;
  • the step of covering the first cover plate is to cover the first cover plate at the first opening, and the first cover plate has a first relief hole penetrating through it, so that the first tab passes through the first relief hole. Connected to the side of the first cover facing away from the accommodating cavity;
  • the sealing plate is sealingly connected to the side of the first cover plate away from the accommodating cavity, and the sealing plate is made to cover the first relief hole.
  • the method before the step of covering the first cover plate, the method further includes:
  • the step of covering the first cover plate further includes: covering the first cover plate at the first opening, and positioning the first recess on the side of the first cover plate away from the accommodating cavity, and removing the first tab from the first opening.
  • a relief hole passes through, the first tab has a connecting part and a fixing part, the connecting part is inserted in the first relief hole, and the fixing part is bent relative to the connecting part so that the fixing part is arranged in the first recess and Connect to the bottom plate.
  • the method before the step of covering the first cover plate, the method further includes:
  • the step of covering the first cover plate further includes: continuing to cover the first cover plate on the isolation plate, so that the first tab passes through the second relief hole and the first relief hole in sequence.
  • the secondary battery includes an electrode unit, a case, a first cover plate, and a sealing plate.
  • the electrode unit is located in the casing, and the first tab of the electrode unit protrudes from the first opening.
  • the first cover plate is arranged at the first opening, so that the first tab passes through the first relief hole and is connected to the side of the first cover plate away from the accommodating cavity.
  • FIG. 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a battery pack provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a battery module provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a secondary battery provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of an exploded structure of a secondary battery provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a partial enlarged structure at I in FIG. 5;
  • FIG. 7 is a front view of a secondary battery provided by an embodiment of the present application.
  • Figure 8 is a cross-sectional view at A-A in Figure 7;
  • Figure 9 is a cross-sectional view at B-B in Figure 7;
  • Fig. 10 is a partial enlarged schematic view of the structure of Fig. 9;
  • FIG. 11 is a schematic structural diagram of a first cover plate of a secondary battery provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a separator plate of a secondary battery provided by an embodiment of the present application.
  • FIG. 13 is a schematic flowchart of a method for manufacturing a secondary battery provided by an embodiment of the present application.
  • Electrode unit 110, main body part; 120, first tab; 121, connecting part; 122, fixing part; 130, second tab;
  • the first cover plate 310, the first relief hole; 320, the first recess; 321, the bottom plate; 322, the first section; 323, the second section; 324, the first side wall; 325, the second Side wall; 326, transition part; 330, inner surface; 340, reinforcing strip;
  • Isolation plate 500, second relief hole; 520, first surface; 530, second surface; 540, second recess;
  • the embodiment of the present application first provides a vehicle.
  • the vehicle includes a vehicle main body 2, a receiving portion provided on the vehicle main body 2 and a battery pack 1, and the battery pack 1 is provided on the receiving portion.
  • the vehicle is a new energy vehicle, which can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle.
  • the vehicle body 2 is provided with a drive motor, which is electrically connected to the battery pack 1, and the battery pack 1 provides electrical energy.
  • the drive motor is connected to the wheels on the vehicle body 2 through a transmission mechanism to drive the vehicle.
  • the battery pack 1 may be horizontally arranged at the bottom of the vehicle body 2.
  • the battery pack 1 includes a box body 12 and a battery module 11 arranged in the box body 12.
  • the number of battery modules 11 is one or more, and a plurality of battery modules 11 are arranged in the box 12 in a row.
  • the type of the box 12 is not limited.
  • the box 12 may be a frame-shaped box, a disk-shaped box, or a box-shaped box.
  • the box 12 may include a lower box for accommodating battery modules and a lower box. The upper box with the box cover closed.
  • the battery module 11 includes a frame 20 and a plurality of secondary batteries 10 located in the frame 20.
  • the frame 20 is arranged side by side.
  • the frame 20 can be arranged in many ways.
  • the frame 20 includes a housing and a cover plate covering the housing; or, the frame 20 includes side plates 23 and end plates 21 that are successively enclosed and connected; or, the frame 20 includes oppositely arranged The end plates 21 and bands 22 surrounding the end plates 21 and the secondary battery 10; or, as shown in FIG. 3, the frame 20 includes side plates 23, end plates 21 and bands 22.
  • a plurality of secondary batteries 10 may also be directly arranged in the box 12 of the battery pack 1.
  • the arrangement of the plurality of secondary batteries 10 in the box 12 is not limited, for example, the plurality of secondary batteries 10 are stacked in the box 12 along the height direction; or, the plurality of secondary batteries 10 are arranged in the box 12 Arranged side by side; or, part of the secondary batteries 10 are stacked in the box 12, and another part of the secondary batteries 10 are arranged side by side in the box 12, etc.
  • the secondary battery 10 can be used not only in vehicles but also in other devices.
  • the embodiment of the present application also provides a device that uses the secondary battery 10 as a power source.
  • the device can be, but is not limited to, a vehicle, a ship, an aircraft, or the like.
  • FIG. 4 is a schematic structural diagram of a secondary battery 10 according to an embodiment of the application
  • FIG. 5 is an exploded structural schematic diagram of a secondary battery 10 according to an embodiment of the application
  • 6 is a schematic diagram of a partially enlarged structure of FIG. 5
  • FIG. 7 is a front view of a secondary battery 10 according to an embodiment of the application
  • FIG. 8 is a schematic diagram of a partially enlarged structure of AA in FIG. 7
  • FIG. 9 is a schematic diagram of BB in FIG. Cutaway view.
  • the secondary battery 10 of the embodiment of the present application includes: an electrode unit 100, including a main body 110, and a first tab 120 and a second tab 130 extending from the main body 110; a housing 200 having a housing for accommodating the main body 110 The accommodating cavity 210 and the first opening 220 communicating with the accommodating cavity 210; the first cover plate 300 is disposed at the first opening 220, the first cover plate 300 has a first relief hole 310 extending therethrough, and a first tab 120 passes through the first clearance hole 310 and is connected to the side of the first cover 300 away from the accommodating cavity 210; the sealing plate 400 is hermetically connected to the side of the first cover 300 away from the accommodating cavity 210 and covers the first cover 300. Position hole 310.
  • the secondary battery 10 includes an electrode unit 100, a case 200, a first cover plate 300 and a sealing plate 400.
  • the electrode unit 100 is located in the housing 200, and the first tab 120 of the electrode unit 100 protrudes from the first opening 220.
  • the first cover 300 is disposed at the first opening 220 so that the first tab 120 passes through the first relief hole 310 and is connected to the side of the first cover 300 away from the receiving cavity 210.
  • the first tab 120 can be bent first to make at least part of the first tab 120
  • One lug 120 is in contact with the first cover plate 300, and then the first lug 120 is directly welded to the first cover plate 300, other mechanical parts (such as adapter plates) can be omitted, thereby reducing production costs; furthermore, when The first tab 120 is welded to the side of the first cover 300 away from the accommodating cavity 210, which can reduce the space occupied by the first tab 120 in the housing 200, thereby increasing the energy density; and, when the first tab 120 After being welded to the first cover plate 300, there is no need to change the relative positional relationship between the first tab 120 and the main body 110, and the probability that the first tab 120 is inserted into the main body 110 can be reduced.
  • the secondary battery 10 of the embodiment of the present application can not only reduce the space occupied by the first tab 120 in the housing 200, but also improve the safety performance of the secondary battery 10.
  • the secondary battery 10 further includes a first electrode terminal 600 electrically connected to the first tab 120 and a second electrode terminal 700 electrically connected to the second tab 130.
  • the first electrode terminal 600 is electrically connected to the housing 200, and the housing 200 is electrically connected to the first cover plate 300, so that the first electrode terminal 600 is electrically connected to the first tab 120 through the housing 200 and the first cover plate 300. connection.
  • the second electrode terminal 700, the housing 200, and the first cover plate 300 are insulated from each other.
  • the secondary battery 10 further includes a second cover plate 800 disposed opposite to the first cover plate 300.
  • the housing 200 has a second opening 230 communicating with the accommodating cavity 210, and the first and second openings 230 and the first opening 220 are respectively located on both sides of the housing 200 in the height direction (the Z direction in FIG. 4).
  • the locations of the first electrode terminal 600 and the second electrode terminal 700 are not limited here, and the first electrode terminal 600 and the second electrode terminal 700 may be provided on the same side of the secondary battery 10.
  • the first electrode terminal 600 and the second electrode terminal 700 are disposed on the first cover plate 300 at the same time, or the first electrode terminal 600 and the second electrode terminal 700 are disposed on the second cover plate 800 at the same time.
  • the first electrode terminal 600 and the second electrode terminal 700 are separately provided on both sides of the secondary battery 10, and the first electrode terminal 600 and the second electrode terminal 700 are respectively provided on the first cover.
  • the plate 300 and the second cover plate 800, the first tab 120 is connected to the first electrode terminal 600 through the first cover plate 300, the housing 200, and the second cover plate 800 in turn, and the second tab 130 is connected to the second cover plate 800 Insulation settings.
  • the first tab 120 includes a connecting portion 121 and a fixing portion 122, the connecting portion 121 is connected between the fixing portion 122 and the main body 110, and the connecting portion 121 penetrates through the first relief hole 310 is set, the fixing portion 122 and the connecting portion 121 intersect, and the fixing portion 122 is connected to the outer surface of the first cover 300.
  • the outer surface of the first cover plate 300 refers to the surface of the first cover plate 300 facing away from the containing cavity 210.
  • the connecting portion 121 is bent and arranged relative to the fixing portion 122, and the connecting portion 121 penetrates through the first relief hole 310. Therefore, the first tab 120 can be penetrated through the first lug through the connecting portion 121.
  • the fixing portion 122 extends from the first relief hole 310 and is connected to the first cover 300.
  • the outer surface of the first cover 300 away from the receiving cavity 210 is recessed toward the receiving cavity 210 and forms a first recess 320.
  • the first recess 320 has a bottom plate 321, and the first relief hole 310 is located on the bottom plate 321 in the thickness direction of the secondary battery 10 ( On one side of the Y direction in FIG. 4, the connecting portion 121 of the first tab 120 penetrates the first relief hole 310, and the fixing portion 122 is located in the first recess 320 and connected to the bottom plate 321.
  • the electrode unit 100 is a laminated structure, the electrode unit 100 is formed by stacking a plurality of pole pieces and an isolation film.
  • the thickness direction of the secondary battery 10 is consistent with the stacking direction; when the electrode unit 100 is a wound structure, the electrode unit 100 The unit 100 is formed by winding a pole piece and a separator film. At this time, the electrode unit 100 includes two flat surfaces and two narrow surfaces. The so-called flat surface is generally a flat surface. At this time, the thickness direction of the secondary battery 10 is perpendicular to the flat surface. direction.
  • a first recess 320 is formed on the first cover 300, and the fixing portion 122 of the first lug 120 is located in the first recess 320, which can reduce the height of the first lug 120.
  • the space occupied improves the flatness of the outer surface of the first cover plate 300, and can reduce the space occupied by the entire secondary battery 10 in the battery module.
  • the number of electrode units 100 in the casing 200 is not limited, and there may be only one electrode unit 100 in the casing 200. Or in other alternative embodiments, two electrode units 100 are provided in the housing 200, and the two electrode units 100 are arranged side by side along the thickness direction.
  • Two first relief holes 310 are provided on the first cover plate 300. The two first relief holes 310 are located on both sides of the bottom plate 321 in the thickness direction.
  • the first tabs 120 of the two electrode units 100 are connected to each other.
  • the portions 121 respectively pass through the two first relief holes 310, and the fixing portions 122 of the two first tabs 120 are extended and formed in directions approaching each other.
  • the two fixing portions 122 are arranged side by side in the thickness direction, or the two fixing portions 122 are stacked in the height direction, as long as It is only necessary that the two fixing portions 122 are both located in the first concave portion 320.
  • the extension depth of the first recess 320 in the height direction is greater than the extension thickness of the first cover 300 in the height direction, and the bottom plate 321 protrudes in the direction toward the accommodating cavity 210.
  • the first cover 300 is disposed toward the inner surface 330 of the receiving cavity 210.
  • the depth of the first recess 320 is relatively deep, which can increase the accommodating volume of the first recess 320 and ensure that both the fixing portions 122 of the two first tabs 120 can be located in the first recess 320.
  • the first recess 320 has a first section 322 and a second section 323 successively distributed in the height direction, and the first section 322 is located in the second section 323 away from the accommodating cavity 210.
  • One side, and the orthographic projection of the second segment 323 in the height direction is located in the orthographic projection of the first segment 322 in the height direction; at least part of the fixing portion 122 is accommodated in the second segment 323, and the sealing plate 400 is accommodated in First segment 322.
  • the first recess 320 forms a second section 323 for accommodating the fixing portion 122 and a first section 322 for accommodating the sealing plate 400 in the height direction, respectively.
  • the orthographic projection of the second segment 323 in the height direction is within the orthographic projection of the first segment 322 in the height direction, that is, the size of the first segment 322 is larger than the size of the second segment 323. It can be ensured that the sealing plate 400 can completely cover the second segment 323, thereby ensuring that the sealing plate 400 can completely cover the first relief hole 310 and the fixing portion 122, and the sealing performance of the secondary battery 10 can be improved.
  • the sealing plate 400 is accommodated in the first section 322.
  • the sealing plate 400 is connected to the surface of the first recess 320 facing the first section 322.
  • the first recess 320 has a first side wall 324 facing the first section 322 and a second side wall 325 facing the second section 323, the first side wall 324 and the second side wall 325
  • the two side walls 325 are connected to each other by a transition portion 326, and the sealing plate 400 is located on the side of the transition portion 326 away from the receiving cavity 210.
  • the first recess 320 has a transition portion 326 connecting the first side wall 324 and the second side wall 325.
  • the transition portion 326 is used to carry the sealing plate 400 so that the sealing plate 400 can be connected to the transition portion. 326 is away from the side of the receiving cavity 210.
  • the first segment 322 and the second segment 323 can be formed by a stamping process.
  • the first segment 322 can be formed by stamping process.
  • the transition portion 326 is formed by turning, and the thickness of the transition portion 326 in the height direction is small.
  • sealing plate 400 and the transition portion 326 there are many ways to connect the sealing plate 400 and the transition portion 326 to each other, for example, the sealing plate 400 and the transition portion 326 are bonded to each other.
  • the sealing plate 400 and the transition part 326 are welded to each other. After the sealing plate 400 and the transition part 326 are welded to each other, a welding area is formed on the edge of the sealing plate 400, and the first cover plate 300 faces the accommodating cavity 210.
  • the inner surface 330 is provided with a reinforcing strip 340, and the orthographic projection of the reinforcing strip 340 in the height direction covers the orthographic projection of the welding area in the height direction.
  • the edge of the sealing plate 400 has a welding area.
  • the transition portion 326 may be thermally deformed or even weld through.
  • a reinforcing bar 340 is provided on the side of the transition portion 326 facing the accommodating cavity 210, and the orthographic projection of the reinforcing bar 340 in the height direction covers the orthographic projection of the welding area in the height direction. That is, the size of the reinforcing strip 340 is greater than or equal to the size of the welding area, which can increase the strength of the transition portion 326 and prevent the transition portion 326 from being deformed during the welding process.
  • the reinforcing bar 340 protrudes from the side of the transition portion 326 close to the accommodating cavity 210.
  • the thickness of the position where the transition portion 326 is located can be thickened to prevent the transition portion 326 from being heated. Deformed or even welded through.
  • the reinforcing bar 340 is made of high temperature resistant or high-strength materials, which can enhance the structural strength and high temperature resistance of the transition portion 326, thereby preventing the transition portion 326 from being thermally deformed or even welded. wear.
  • the secondary battery 10 further includes an isolation plate 500, the isolation plate 500 is located between the first cover plate 300 and the main body 110, the isolation plate 500 is provided with a Two relief holes 510, the first tab 120 passes through the first relief hole 310 and the second relief hole 510.
  • the isolation plate 500 can ensure that the first cover plate 300 and the main body 110 are insulated from each other, and the safety performance of the secondary battery 10 can be improved.
  • the secondary battery 10 includes the isolation plate 500, the first tab 120 is disposed through the first relief hole 310 and the second relief hole 510, that is, the connecting portion 121 passes through the first relief hole 310 and the second relief hole 510. Hole 510 is set.
  • the relative positional relationship between the first relief hole 310 and the second relief hole 510 is not limited here.
  • the second relief hole 510 and the first relief hole 310 are located at the position of the electrode unit 100
  • the orthographic projections in the height direction overlap at least partially.
  • the connecting portion 121 extending in the height direction can pass through the first relief hole 310 and the second relief hole 510 at the same time, and the extension distance of the connecting portion 121 is reduced, thereby reducing the size of the connecting portion 121.
  • the sizes of the first relief hole 310 and the second relief hole 510 are adapted to the connection portion 121, so that the first relief hole 310 and the second relief hole 510 can provide a limit to the connection portion 121, The stability of the relative position between the connecting portion 121 and the first cover plate 300 and the isolation plate 500 is ensured. At this time, the orthographic projections of the first relief hole 310 and the second relief hole 510 in the height direction are overlapped.
  • the size of the second relief hole 510 is smaller than the size of the first relief hole 310. Since the size of the second relief hole 510 is small, the root of the first tab 120 can be Tether, thereby reducing the probability that the first tab 120 is inserted into the main body 110 under vibration.
  • the isolation plate 500 has a first surface 520 facing the first cover 300 and a second surface 530 facing the main body 110, and the first surface 520 faces The second surface 530 is recessed and forms a second recess 540, and at least a part of the bottom plate 321 is located in the second recess 540.
  • the first surface 520 is in contact with the inner surface of the first cover 300
  • the second surface 530 is in contact with the end surface of the main body 110 close to the first cover 300, so that the isolation plate 500 is fixed to the main body. 110 and the first cover 300.
  • a second recess 540 is formed on the isolation plate 500, and at least part of the bottom plate 321 is located in the second recess 540, which can not only reduce the space occupied by the bottom plate 321 and the fixing portion 122 in the height direction, but also can reach the bottom plate through the second recess 540.
  • the 321 provides a limit to ensure the stability of the relative position between the bottom plate 321 and the second recess 540, thereby ensuring the stability of the relative position of the components in the secondary battery 10, and improving the reliability of the secondary battery 10.
  • An embodiment of the present application also provides a method for manufacturing a secondary battery.
  • the secondary battery 10 is the secondary battery 10 of any of the foregoing embodiments.
  • the method includes:
  • Step S101 a step of assembling the electrode unit.
  • step S101 includes: placing the electrode unit 100 in the accommodating cavity 210 of the housing 200, the electrode unit 100 includes a main body 110 and a first tab 120 and a second tab 130 extending from the main body 110,
  • the housing 200 has a first opening 220 communicating with the accommodating cavity 210 so that the first tab 120 faces the first opening 220.
  • Step S102 a step of covering the first cover plate.
  • step S102 includes: arranging the first cover plate cover 300 at the first opening 220, the first cover plate 300 has a first relief hole 310 extending therethrough, and the first tab 120 passes through the first relief hole 310.
  • the position hole 310 is connected to the side of the first cover 300 away from the receiving cavity 210.
  • Step S103 a sealing step.
  • step S103 includes: sealingly connecting the sealing plate 400 to a side of the first cover plate 300 away from the accommodating cavity 210, and covering the sealing plate 400 with the first relief hole 310.
  • the secondary battery 10 is first placed in the accommodating cavity 210 in step S101, and then the first tab 120 is set through the first relief hole 310 in step S102, and then the second A tab 120 is connected to the outer surface of the first cover away from the receiving cavity 210, and finally the first cover 300 is sealed by step S103.
  • the method for manufacturing the secondary battery of the embodiment of the present application can not only reduce the space occupied by the first tab 120 in the housing 200, but also improve the safety performance of the secondary battery 10.
  • the method before step S102, further includes: stamping the first cover plate 300 to form a first recess 320 on the surface of the first cover plate 300, the first recess 320 has a bottom plate 321, and the first recess The hole 310 is located on one side of the bottom plate 321 in the thickness direction of the secondary battery 10.
  • step 102 also includes: covering the first cover 300 at the first opening 220, and positioning the first recess 320 on the side of the first cover 300 away from the accommodating cavity 210, and placing the first tab 120 Passing through the first relief hole 310, the first tab 120 has a connecting portion 121 and a fixing portion 122.
  • the connecting portion 121 passes through the first relief hole 310, and the fixing portion 122 is bent relative to the connecting portion 121 to make The fixing portion 122 is disposed in the first recess 320 and connected to the bottom plate 321.
  • the method further includes: disposing the isolating plate 500 at the first opening 220, and disposing the first tab 120 through the second relief hole 510.
  • the method further includes: arranging at least part of the bottom plate 321 of the first cover plate 300 in the second recess 540 of the isolation plate 500. The first cover plate 300 is continuously covered on the isolation plate 500 so that the first tab 120 passes through the second relief hole 510 and the first relief hole 310 in sequence.
  • the isolation plate 500 can ensure that the first cover plate 300 and the main body 110 are insulated from each other, and the safety performance of the secondary battery 10 can be improved. Disposing the bottom plate 321 of the first recess 320 in the second recess 540 can not only reduce the space occupied by the bottom plate 321 and the first tab 120 in the height direction, but also provide a limit to the bottom plate 321 through the second recess 540. The stability of the relative position between the bottom plate 321 and the second recess 540 is ensured, thereby ensuring the stability of the relative position of the components in the secondary battery 10, and improving the reliability of the secondary battery 10.

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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)
  • Aviation & Aerospace Engineering (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Secondary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Cell Separators (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请实施例提供一种二次电池、电池模块、电池组、装置及制造方法，二次电池包括：电极单元，包括主体部和以及从主体部延伸出的第一极耳和第二极耳；壳体，具有容纳主体部的容纳腔及与容纳腔连通的第一开口；第一盖板，盖设于第一开口处，第一盖板具有贯穿设置的第一让位孔，第一极耳穿过第一让位孔并连接于第一盖板背离容纳腔的一侧；密封板，密封连接于第一盖板背离容纳腔的一侧，并覆盖第一让位孔。

Description

二次电池、电池模块、电池组、装置及制造方法
相关申请的交叉引用
本申请要求享有于2019年10月15日提交的名称为“二次电池、电池模块、电池组、装置及制造方法”的中国专利申请第201910976467.2号的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及储能设备技术领域，尤其涉及一种二次电池、电池模块、电池组、装置及制造方法。
背景技术
在二次电池中，为了提升二次电池的能量密度通常会在壳体内容纳尽可能多的活性物质，以提高壳体内部的空间利用率。二次电池通常包括壳体、盖板、电极单元和电极端子，壳体与盖板密封连接，电极单元位于壳体内并且包括主体部和以及从主体部延伸出的极耳，极耳通过其他机械件(比如转接片)与电极端子电连接。在壳体内部空间不变的情况下，主体部的体积越大，则活性物质越多，然而位于壳体内部的极耳或者其他机械件(比如转接片)会占用壳体内部空间，从而造成壳体内部不能容纳更多的活性物质，降低二次电池的能量密度。
发明内容
本申请提供一种二次电池、电池模块、电池组、装置及制造方法，旨在提高二次电池的能量密度。
本申请第一方面的实施例提供了一种二次电池，包括：电极单元，包括主体部和以及从主体部延伸出的第一极耳和第二极耳；壳体，具有容纳主体部的容纳腔及与容纳腔连通的第一开口；第一盖板，盖设于第一开口 处，第一盖板具有贯穿设置的第一让位孔，第一极耳穿过第一让位孔并连接于第一盖板背离容纳腔的一侧；密封板，密封连接于第一盖板背离容纳腔的一侧、并覆盖第一让位孔。
根据本申请第一方面的实施例，第一盖板背离容纳腔的外表面朝向容纳腔凹陷并形成第一凹部，第一凹部具有底板，并且第一让位孔位于底板沿二次电池厚度方向的一侧；
第一极耳具有连接部和固定部，固定部位于第一凹部内、并连接于底板，连接部相对于固定部弯折设置并穿设于第一让位孔。
可选地，第一让位孔为两个，两个第一让位孔位于底板沿厚度方向上的两侧；
电极单元的数量为两个，两个电极单元沿厚度方向并排设置，并且两个电极单元各自的第一极耳分别穿过两个第一让位孔，两个第一极耳的固定部沿相互靠近的方向延伸成型。
可选地，第一盖板具有朝向容纳腔的内表面，底板在朝向容纳腔的方向上凸出于内表面设置。
可选地，第一凹部在二次电池的高度方向上具有相继分布的第一分段和第二分段，第一分段位于第二分段背离容纳腔的一侧，且第二分段在高度方向上的正投影位于第一分段在高度方向上的正投影内；
至少部分固定部容纳于第二分段，密封板容纳于第一分段。
可选地，第一凹部具有朝向第一分段的第一侧壁和朝向第二分段的第二侧壁，第一侧壁和第二侧壁通过过渡部相互连接，密封板位于过渡部背离容纳腔的一侧。
可选地，密封板的边缘具有熔接区域，第一盖板朝向容纳腔的内表面设置有加强条；
加强条在电极单元的高度方向上的正投影覆盖熔接区域在高度方向上的正投影。
根据本申请第一方面的实施例，还包括隔离板，隔离板位于第一盖板与主体部之间，隔离板上贯穿设置有第二让位孔，第一极耳穿过第一让位孔和第二让位孔。
可选地，第二让位孔和第一让位孔在电极单元的高度方向上的正投影至少部分重叠。
可选地，隔离板具有朝向第一盖板的第一表面以及朝向主体部的第二表面，第一表面朝向第二表面凹陷并形成第二凹部，至少部分的底板位于第二凹部内。
可选地，二次电池还包括与第一极耳电连接的第一电极端子以及与第二极耳电连接的第二电极端子，第一电极端子与第一盖板、壳体电连接，第二电极端子与第一盖板、壳体绝缘设置。
可选地，二次电池还包括第二盖板，壳体具有与容纳腔连通的第二开口，并且第二开口和第一开口分别位于壳体沿二次电池高度方向的两端，第二盖板盖设于第二开口处，第一电极端子和第二电极端子均设置于第二盖板，第一极耳依次穿过第一盖板、壳体、第二盖板与第一电极端子电连接，第二极耳与第二盖板绝缘设置。
本申请第二方面的实施例还提供一种电池模块，包括框架多个上述的二次电池，多个二次电池在框架内并排设置。
本申请第三方面的实施例还提供一种电池组，包括箱体和位于箱体内的上述的二次电池。
本申请第四方面的实施例还提供一种使用二次电池作为电源的装置，包括容纳部以及位于容纳部内的多个上述的二次电池。
本申请第五方面的实施例还提供一种二次电池的制造方法，包括：
装配电极单元的步骤，将电极单元设置于壳体的容纳腔内，电极单元包括主体部和从主体部延伸出的第一极耳和第二极耳，壳体具有和容纳腔连通的第一开口，令第一极耳朝向第一开口；
盖设第一盖板的步骤，将第一盖板盖设于第一开口处，第一盖板具有贯穿设置的第一让位孔，令第一极耳由第一让位孔穿过并连接于第一盖板背离容纳腔的一侧；
密封步骤，将密封板密封连接于第一盖板背离容纳腔的一侧，并令密封板覆盖第一让位孔。
根据本申请第五方面的实施例，在盖设第一盖板的步骤之前还包括：
冲压第一盖板，以在第一盖板表面形成第一凹部，第一凹部具有底板，并且第一让位孔位于底板沿二次电池厚度方向的一侧；
在盖设第一盖板的步骤中还包括：将第一盖板盖设于第一开口处，并令第一凹部位于第一盖板背离容纳腔的一侧，将第一极耳从第一让位孔穿过，第一极耳具有连接部和固定部，连接部穿设于第一让位孔内，将固定部相对连接部弯折，令固定部设置于第一凹部内、并连接于底板。
可选地，在盖设第一盖板的步骤之前还包括：
将隔离板盖设于第一开口处，隔离板上贯穿设置有第二让位孔，令第一极耳穿过第二让位孔；
盖设第一盖板的步骤还包括：在隔离板上继续盖设第一盖板，令第一极耳依次穿过第二让位孔和第一让位孔。
在本申请的二次电池中，二次电池包括电极单元、壳体、第一盖板及密封板。电极单元位于壳体内，且电极单元的第一极耳由第一开口处伸出。第一盖板盖设于第一开口处，令第一极耳穿过第一让位孔并连接于第一盖板背离容纳腔的一侧。通过将第一极耳穿过第一让位孔并连接于第一盖板背离容纳腔的一侧，可以减少极耳在壳体内占用的空间，从而提高二次电池的能量密度。
附图说明
通过阅读以下参照附图对非限制性实施例所作的详细描述，本申请的其它特征、目的和优点将会变得更明显，其中，相同或相似的附图标记表示相同或相似的特征。
图1是本申请实施例提供的一种车辆的结构示意图；
图2是本申请实施例提供的一种电池组的结构示意图；
图3是本申请实施例提供的一种电池模块的结构示意图；
图4是本申请实施例提供的一种二次电池的结构示意图；
图5是本申请实施例提供的一种二次电池的***结构示意图；
图6是图5中I处的局部放大结构示意图；
图7是本申请实施例提供的一种二次电池的主视图；
图8是图7中A-A处的剖视图；
图9是图7中B-B处的剖视图；
图10是图9的局部放大结构示意图；
图11是本申请实施例提供的一种二次电池的第一盖板的结构示意图；
图12是本申请实施例提供的一种二次电池的隔离板的结构示意图；
图13是本申请实施例提供的一种二次电池的制造方法的流程示意图。
附图标记说明：
1、电池组；2、车辆主体；
11、电池模块；12、箱体；
10、二次电池；20、容纳部；21、端板；22、箍带；23、侧板；
100、电极单元；110、主体部；120、第一极耳；121、连接部；122、固定部；130、第二极耳；
200、壳体；210、容纳腔；220、第一开口；230、第二开口
300、第一盖板；310、第一让位孔；320、第一凹部；321、底板；322、第一分段；323、第二分段；324、第一侧壁；325、第二侧壁；326、过渡部；330、内表面；340、加强条；
400、密封板；
500、隔离板；510、第二让位孔；520、第一表面；530、第二表面；540、第二凹部；
600、第一电极端子；
700、第二电极端子；
800、第二盖板。
具体实施方式
下面将详细描述本申请的各个方面的特征和示例性实施例。在下面的详细描述中，提出了许多具体细节，以便提供对本申请的全面理解。但是，对于本领域技术人员来说很明显的是，本申请可以在不需要这些具体 细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本申请的示例来提供对本申请的更好的理解。在附图和下面的描述中，至少部分的公知结构和技术没有被示出，以便避免对本申请造成不必要的模糊；并且，为了清晰，可能夸大了部分结构的尺寸。此外，下文中所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施例中。
在本申请的描述中，需要说明的是，除非另有说明，“多个”的含义是两个以上；术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系仅是为了便于描述本申请和简化描述，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申请的限制。此外，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性。
下述描述中出现的方位词均为图中示出的方向，并不是对本申请的实施例的具体结构进行限定。在本申请的描述中，还需要说明的是，除非另有明确的规定和限定，术语“安装”、“连接”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；可以是直接相连，也可以间接相连。对于本领域的普通技术人员而言，可视具体情况理解上述术语在本申请中的具体含义。
为了更好地理解本申请，下面结合图1至图13对本申请实施例的二次电池、电池模块、电池组、装置及制造方法进行详细描述。
如图1所示，本申请实施例首先提供一种车辆，车辆包括车辆主体2、设置于车辆主体2的容纳部和电池组1，电池组1设置于容纳部。
其中，车辆为新能源汽车，其可以为纯电动汽车，也可以混合动力汽车或增程式汽车。车辆主体2设置有驱动电机，驱动电机与电池组1电连接，由电池组1提供电能，驱动电机通过传动机构与车辆主体2上的车轮连接，从而驱动汽车行进。可选地，电池组1可水平设置于车辆主体2的底部。
请一并参阅图2，电池组1的设置方式有多种，在一些可选的实施例中，电池组1包括箱体12和设置于箱体12内的电池模块11。
电池模块11的数量为一个或多个，多个电池模块11排列布置于箱体 12内。箱体12的类型不受限制，箱体12可为框状箱体、盘状箱体或盒状箱体等，具体地，箱体12可包括用于容纳电池模块的下箱体和与下箱体盖合的上箱体。
请一并参阅图3，电池模块11的设置方式有多种，在一些可选的实施例中，电池模块11包括框架20和位于框架20内的多个二次电池10，二次电池10在框架20内并排设置。
框架20的设置方式有多种，例如框架20包括外壳和盖设于外壳处的盖板；或者，框架20包括相继围合连接的侧板23和端板21；或者，框架20包括相对设置的两端板21及环绕与端板21和二次电池10外的箍带22；或者，如图3所示，框架20包括侧板23、端板21和箍带22。
上述的电池组1的设置方式不仅限于此，在一些可选的实施例中，多个二次电池10还可以直接设置于电池组1的箱体12内。多个二次电池10在箱体12内的设置方式不做限定，例如多个二次电池10在箱体12内沿其高度方向堆叠设置；或者，多个二次电池10在箱体12内并排设置；或者，部分二次电池10在箱体12内堆叠设置，另一部分二次电池10在箱体12内并排设置等。
可以理解的是，二次电池10不仅可以应用于车辆，还可以用于其他装置。本申请实施例还提供一种使用二次电池10作为电源的装置，装置可以但不仅限于为车辆、船舶或飞行器等。
请一并参阅图4至图9，图4为本申请实施例提供的一种二次电池10的结构示意图，图5为本申请实施例提供的一种二次电池10的***结构示意图，图6为图5的局部放大结构示意图；图7为本申请实施例的一种二次电池10的主视图；图8是图7中A-A处的局部放大结构示意图，图9是图7中B-B处的剖视图。
本申请实施例的二次电池10包括：电极单元100，包括主体部110和以及从主体部110延伸出的第一极耳120和第二极耳130；壳体200，具有容纳主体部110的容纳腔210及与容纳腔210连通的第一开口220；第一盖板300，盖设于第一开口220处，第一盖板300具有贯穿设置的第一让位孔310，第一极耳120穿过第一让位孔310并连接于第一盖板300背 离容纳腔210的一侧；密封板400，密封连接于第一盖板300背离容纳腔210的一侧、并覆盖第一让位孔310。
在本申请实施例的二次电池10中，二次电池10包括电极单元100、壳体200、第一盖板300及密封板400。电极单元100位于壳体200内，且电极单元100的第一极耳120由第一开口220处伸出。第一盖板300盖设于第一开口220处，令第一极耳120穿过第一让位孔310并连接于第一盖板300背离容纳腔210的一侧。因此在本申请实施例的二次电池10的装配过程中，在将第一极耳120穿过第一让位孔310以后，可以先对第一极耳120进行弯折以使至少部分的第一极耳120和第一盖板300相接触，再将第一极耳120直接焊接于第一盖板300，可以省略其他机械件(比如转接片)，从而降低生产成本；再者，当第一极耳120焊接于第一盖板300背离容纳腔210的一侧，可以减小第一极耳120在壳体200内的占用空间，从而提高能量密度；并且，当第一极耳120与第一盖板300焊接后，无需再改变第一极耳120与主体部110的相对位置关系，可以减小第一极耳120***主体部110内部的概率。
因此本申请实施例的二次电池10，不仅能够减小第一极耳120在壳体200内的占用空间，而且可以提高二次电池10的安全性能。
二次电池10还包括与第一极耳120电连接的第一电极端子600以及与第二极耳130电连接的第二电极端子700。其中，第一电极端子600和壳体200电连接，壳体200和第一盖板300电连接，以使第一电极端子600通过壳体200和第一盖板300与第一极耳120电连接。第二电极端子700和壳体200、第一盖板300相互绝缘设置。
在一些可选的实施例中，二次电池10还包括和第一盖板300相对设置的第二盖板800。壳体200具有与容纳腔210连通的第二开口230，且第一二开口230和第一开口220分别位于壳体200在高度方向(图4中的Z方向)的两侧。第一电极端子600和第二电极端子700的设置位置在此不做限定，第一电极端子600和第二电极端子700可以设置于二次电池10的同侧。例如第一电极端子600和第二电极端子700同时设置于第一盖板300，或者第一电极端子600和第二电极端子700同时设置于第二盖板 800。或者，在另一些可选的实施例中，第一电极端子600和第二电极端子700分设于二次电池10的两侧，第一电极端子600和第二电极端子700分别设置于第一盖板300和第二盖板800，第一极耳120依次通过第一盖板300、壳体200、第二盖板800与第一电极端子600连接，第二极耳130与第二盖板800绝缘设置。
第一极耳120的设置方式有多种，请一并参阅图10。在一些可选的实施例中，第一极耳120包括连接部121和固定部122，连接部121连接于固定部122和主体部110之间，且连接部121穿设于第一让位孔310设置，固定部122和连接部121相交，且固定部122连接于第一盖板300的外表面。其中，第一盖板300的外表面是指第一盖板300背离容纳腔210的表面。
在这些可选的实施例中，连接部121相对固定部122弯折设置，且连接部121穿设于第一让位孔310，因此，第一极耳120能够通过连接部121穿设于第一让位孔310，固定部122由第一让位孔310伸出并连接于第一盖板300。
第一盖板300的设置方式有多种，在一些可选的实施例中，请一并参阅图11。第一盖板300背离容纳腔210的外表面朝向容纳腔210凹陷并形成第一凹部320，第一凹部320具有底板321，且第一让位孔310位于底板321在二次电池10厚度方向(图4中的Y方向)上的一侧，第一极耳120的连接部121穿设于第一让位孔310，且固定部122位于第一凹部320内并连接于底板321。当电极单元100为叠片结构时，电极单元100由多个极片和隔离膜堆叠形成，此时二次电池10的厚度方向与堆叠方向一致；当电极单元100为卷绕式结构时，电极单元100由极片和隔离膜卷绕形成，此时电极单元100包括两个扁平面和两个窄面，所谓扁平面大体为平面，此时二次电池10的厚度方向为垂直于扁平面的方向。
在这些可选的实施例中，第一盖板300上形成有第一凹部320，且第一极耳120的固定部122位于第一凹部320内，能够减小第一极耳120在高度方向(图4中的Z方向)上占据的空间，提高第一盖板300外表面的平整性，而且可以减小整个二次电池10在电池模块中所占用的空间。
壳体200内电极单元100的个数不做限定，壳体200内可以只有一个电极单元100。或者在另一些可选的实施例中，壳体200内设置有两个电极单元100，两个电极单元100沿厚度方向并排设置。第一盖板300上设置有两个第一让位孔310，两个第一让位孔310位于底板321沿厚度方向上的两侧，两个电极单元100各自的第一极耳120的连接部121分别穿过两个第一让位孔310，且两个第一极耳120的固定部122沿相互靠近的方向延伸成型。
两个第一极耳120的固定部122之间的相对位置关系的设置方式有多种，例如两个固定部122在厚度方向上并排设置，或者两个固定部122沿高度方向层叠设置，只要两个固定部122均位于第一凹部320内即可。
第一凹部320的设置方式有多种，例如第一凹部320在高度方向上的延伸深度大于第一盖板300在高度方向上的延伸厚度，底板321在朝向容纳腔210的方向上凸出于第一盖板300朝向容纳腔210的内表面330设置。
在这些可选的实施例中，第一凹部320的深度较深，能够增加第一凹部320的容纳体积，保证两个第一极耳120的固定部122均能够位于第一凹部320内。
在另一些可选的实施例中，第一凹部320在高度方向上具有相继分布的第一分段322和第二分段323，第一分段322位于第二分段323背离容纳腔210的一侧，且第二分段323在高度方向上的正投影位于第一分段322在高度方向上的正投影内；至少部分的固定部122容纳于第二分段323，密封板400容纳于第一分段322。
在这些可选的实施例中，第一凹部320在高度方向上形成分别用于容纳固定部122的第二分段323和用于容纳密封板400的第一分段322。且第二分段323在高度方向上的正投影位于第一分段322在高度方向上的正投影内，即第一分段322的尺寸大于第二分段323的尺寸。能够保证密封板400完全覆盖第二分段323，进而保证密封板400能够完全覆盖第一让位孔310及固定部122，提高二次电池10的密封性能。
密封板400容纳于第一分段322的设置方式有多种，例如密封板400 连接于第一凹部320朝向第一分段322的表面。
或者，在另一些可选的实施例中，第一凹部320具有朝向第一分段322的第一侧壁324和朝向第二分段323的第二侧壁325，第一侧壁324和第二侧壁325通过过渡部326相互连接，密封板400位于过渡部326背离容纳腔210的一侧。
在这些可选的实施例中，第一凹部320具有连接第一侧壁324和第二侧壁325的过渡部326，过渡部326用于承载密封板400，令密封板400能够连接于过渡部326背离容纳腔210的一侧。通过设置过渡部326，能够向密封板400提供承载，提高密封板400和第一盖板300之间相对位置的稳定性，并且便于密封板400和第一盖板300的焊接。
第一分段322和第二分段323的成型方式有多种，例如，第二分段323可以利用冲压工艺形成。第一分段322的设置方式也有多种，例如在冲压形成第二分段323以后，继续在第二分段323的周侧进行车削形成第一分段322。如此，过渡部326由车削形成，过渡部326在高度方向上的厚度较小。
密封板400和过渡部326相互连接的方式有多种，例如密封板400和过渡部326相互粘接。
或者，为了进一步提高密封性能，密封板400和过渡部326相互焊接，在密封板400和过渡部326相互焊接以后，密封板400的边缘形成有熔接区域，第一盖板300朝向容纳腔210的内表面330设置有加强条340，加强条340在高度方向上的正投影覆盖熔接区域在高度方向上的正投影。
密封板400边缘具有熔接区域，在对密封板400进行焊接的过程中，有可能导致过渡部326受热变形甚至造成焊穿。在本申请的这些可选的实施例中，在过渡部326朝向容纳腔210的一侧设置加强条340，且加强条340在高度方向上的正投影覆盖熔接区域在高度方向上的正投影，即加强条340的尺寸大于或等于熔接区域的尺寸，能够提高过渡部326的强度，防止过渡部326在焊接过程中变形。
加强条340的设置方式有多种，例如加强条340凸出于过渡部326靠 近容纳腔210的一侧设置，通过设置加强条340能够加厚过渡部326所在位置的厚度，防止过渡部326受热变形甚至焊穿。在另一些可选的实施例中，加强条340采用耐高温或强度较高的材料制成，能够加强过渡部326所在位置的结构强度和耐高温的性能，从而防止过渡部326受热变形甚至焊穿。
请一并参阅图12，在一些可选的实施例中，二次电池10还包括隔离板500，隔离板500位于第一盖板300与主体部110之间，隔离板500上贯穿设置有第二让位孔510，第一极耳120穿过第一让位孔310和第二让位孔510。
在这些可选的实施例中，通过设置隔离板500能够保证第一盖板300和主体部110之间相互绝缘，提高二次电池10的安全性能。当二次电池10包括隔离板500时，第一极耳120穿过第一让位孔310和第二让位孔510设置，即连接部121穿过第一让位孔310和第二让位孔510设置。
第一让位孔310和第二让位孔510的相对位置关系在此不做限定，在一些可选的实施例中，第二让位孔510和第一让位孔310在电极单元100的高度方向上的正投影至少部分重叠。令沿高度方向延伸成型的连接部121可以同时穿过第一让位孔310和第二让位孔510，减小连接部121的延伸距离，进而减小连接部121的尺寸。
可选的，第一让位孔310和第二让位孔510的尺寸与连接部121相适配，令第一让位孔310和第二让位孔510能够向连接部121提供限位，保证连接部121和第一盖板300及隔离板500之间相对位置的稳定性。此时第一让位孔310和第二让位孔510在高度方向上的正投影重叠设置。
进一步可选的，在厚度方向上，第二让位孔510的尺寸小于第一让位孔310的尺寸，由于第二让位孔510的尺寸较小，可以对第一极耳120的根部进行束缚，从而减少第一极耳120在震动情况下***主体部110的概率。
隔离板500的设置方式有多种，在一些可选的实施例中，隔离板500具有朝向第一盖板300的第一表面520以及朝向主体部110的第二表面530，第一表面520朝向第二表面530凹陷并形成第二凹部540，至少部分 的底板321位于第二凹部540内。
在这些可选的实施例中，第一表面520与第一盖板300内表面接触，第二表面530与主体部110靠近第一盖板300的端面接触，从而使隔离板500固定于主体部110与第一盖板300之间。
隔离板500上形成有第二凹部540，且至少部分底板321位于第二凹部540内，不仅能够减小底板321及固定部122在高度方向上占据的空间，且通过第二凹部540能够向底板321提供限位，保证底板321和第二凹部540之间相对位置的稳定性，进而保证二次电池10内各零部件之间相对位置的稳定性，提高二次电池10的可靠性。
请一并参阅图13，本申请实施例还提供了一种二次电池的制造方法，二次电池10为上述任一实施例的二次电池10，方法包括：
步骤S101：装配电极单元的步骤。
可选的，步骤S101包括：将电极单元100置于壳体200的容纳腔210内，电极单元100包括主体部110和从主体部110延伸出的第一极耳120和第二极耳130，壳体200具有和容纳腔210连通的第一开口220，令第一极耳120朝向第一开口220。
步骤S102：盖设第一盖板的步骤。
可选的，步骤S102包括：将第一盖板盖300设于第一开口220处，第一盖板300具有贯穿设置的第一让位孔310，将第一极耳120穿过第一让位孔310并连接于第一盖板300背离容纳腔210的一侧。
步骤S103：密封步骤。
可选的，步骤S103包括：将密封板400密封连接于第一盖板300背离容纳腔210的一侧，将密封板400覆盖第一让位孔310。
在本申请实施例的制造方法中，首先通过步骤S101将二次电池10置于容纳腔210内，然后通过步骤S102令第一极耳120穿过第一让位孔310设置，接下来令第一极耳120和第一盖体背离容纳腔210的外表面连接，最后通过步骤S103对第一盖板300进行密封处理。在本申请实施例中，在将第一极耳120穿设于第一让位孔310，并弯折第一极耳120以后，将至少部分第一极耳120和第一盖板300相互连接，因此可以省略其他机械 件(比如转接片)，从而降低生产成本；再者，当第一极耳120焊接于第一盖板300背离容纳腔210的一侧，可以减小第一极耳120在壳体200内的占用空间，从而提高能量密度；并且，当第一极耳120与第一盖板300焊接后，无需再改变第一极耳120与主体部110的相对位置关系，可以减小第一极耳120***主体部110内部的概率。因此本申请的实施例的二次电池的制造方法不仅能够减小第一极耳120在壳体200内的占用空间，而且可以提高二次电池10的安全性能。
在另一些可选的实施例中，步骤S102之前还包括：冲压第一盖板300，以在第一盖板300表面形成第一凹部320，第一凹部320具有底板321，并且第一让位孔310位于底板321沿二次电池10厚度方向的一侧。
此时在步骤102中还包括：将第一盖板300盖设于第一开口220处，并令第一凹部320位于第一盖板300背离容纳腔210的一侧，将第一极耳120从第一让位孔310穿过，第一极耳120具有连接部121和固定部122，连接部121穿设于第一让位孔310内，将固定部122相对连接部121弯折，令固定部122设置于第一凹部320内、并连接于底板321。
此外，当二次电池10包括隔离板500时，在步骤S102之前还包括：将隔离板500设置于第一开口220处，并将第一极耳120穿过第二让位孔510设置。此时，步骤S102之后还包括：将至少部分第一盖板300的底板321设置于隔离板500的第二凹部540内。在隔离板500上继续盖设第一盖板300，令第一极耳120依次穿过第二让位孔510和第一让位孔310。
在这些可选的实施例中，通过设置隔离板500能够保证第一盖板300和主体部110之间相互绝缘，提高二次电池10的安全性能。将第一凹部320的底板321设置于第二凹部540内，不仅能够减小底板321及第一极耳120在高度方向上占据的空间，且通过第二凹部540能够向底板321提供限位，保证底板321和第二凹部540之间相对位置的稳定性，进而保证二次电池10内各零部件之间相对位置的稳定性，提高二次电池10的可靠性。
本领域技术人员应能理解，上述实施例均是示例性而非限制性的。在不同实施例中出现的不同技术特征可以进行组合，以取得有益效果。本领 域技术人员在研究附图、说明书及权利要求书的基础上，应能理解并实现所揭示的实施例的其他变化的实施例。在权利要求书中，术语“包括”并不排除其他装置或步骤；物品没有使用数量词修饰时旨在包括一个/种或多个/种物品，并可以与“一个/种或多个/种物品”互换使用”；术语“第一”、“第二”用于标示名称而非用于表示任何特定的顺序。权利要求中的任何附图标记均不应被理解为对保护范围的限制。权利要求中出现的多个部分的功能可以由一个单独的硬件或软件模块来实现。某些技术特征出现在不同的从属权利要求中并不意味着不能将这些技术特征进行组合以取得有益效果。

Claims (19)

  1. 一种二次电池，包括：
    电极单元，包括主体部和以及从所述主体部延伸出的第一极耳和第二极耳；
    壳体，具有容纳所述主体部的容纳腔及与所述容纳腔连通的第一开口；
    第一盖板，盖设于所述第一开口处，所述第一盖板具有贯穿设置的第一让位孔，所述第一极耳穿过所述第一让位孔并连接于所述第一盖板背离所述容纳腔的一侧；
    密封板，密封连接于所述第一盖板背离所述容纳腔的一侧、并覆盖所述第一让位孔。
  2. 根据权利要求1所述的二次电池，其中，
    所述第一盖板背离所述容纳腔的外表面朝向所述容纳腔凹陷并形成第一凹部，所述第一凹部具有底板，并且所述第一让位孔位于所述底板沿所述二次电池厚度方向的一侧；
    所述第一极耳具有连接部和固定部，所述固定部位于所述第一凹部内、并连接于所述底板，所述连接部相对于所述固定部弯折设置并穿设于所述第一让位孔。
  3. 根据权利要求2所述的二次电池，其中，
    所述第一让位孔为两个，两个所述第一让位孔位于所述底板沿所述厚度方向上的两侧；
    所述电极单元的数量为两个，两个所述电极单元沿所述厚度方向并排设置，并且两个所述电极单元各自的所述第一极耳分别穿过两个所述第一让位孔，两个所述第一极耳的所述固定部沿相互靠近的方向延伸成型。
  4. 根据权利要求2-3任一项所述的二次电池，其中，所述第一盖板具有朝向所述容纳腔的内表面，所述底板在朝向所述容纳腔的方向上凸出于所述内表面设置。
  5. 根据权利要求2-4任一项所述的二次电池，其中，
    所述第一凹部在所述二次电池的高度方向上具有相继分布的第一分段 和第二分段，所述第一分段位于所述第二分段背离所述容纳腔的一侧，且所述第二分段在所述高度方向上的正投影位于所述第一分段在所述高度方向上的正投影内；
    至少部分所述固定部容纳于所述第二分段，所述密封板容纳于所述第一分段。
  6. 根据权利要求5所述的二次电池，其中，所述第一凹部具有朝向所述第一分段的第一侧壁、朝向所述第二分段的第二侧壁以及过渡部，所述第一侧壁和所述第二侧壁通过所述过渡部相互连接，所述密封板位于所述过渡部背离所述容纳腔的一侧。
  7. 根据权利要求5-6任一项所述的二次电池，其中，
    所述密封板的边缘具有熔接区域，所述第一盖板朝向所述容纳腔的内表面设置有加强条，所述加强条在所述电极单元的高度方向上的正投影覆盖所述熔接区域在所述高度方向上的正投影。
  8. 根据权利要求2～7任一项所述的二次电池，还包括隔离板，所述隔离板位于所述第一盖板与所述主体部之间，所述隔离板上贯穿设置有第二让位孔，所述第一极耳穿过所述第一让位孔和所述第二让位孔。
  9. 根据权利要求8所述的二次电池，其中，所述第二让位孔和所述第一让位孔在所述电极单元的高度方向上的正投影至少部分重叠。
  10. 根据权利要求8-9任一项所述的二次电池，其中，在所述厚度方向上，所述第二让位孔的尺寸小于所述第一让位孔的尺寸。
  11. 根据权利要求8-10任一项所述的二次电池，其中，所述隔离板具有朝向所述第一盖板的第一表面以及朝向所述主体部的第二表面，所述第一表面朝向所述第二表面凹陷并形成第二凹部，至少部分的所述底板位于所述第二凹部内。
  12. 根据权利要求1-11任一项所述的二次电池，其中，所述二次电池还包括与所述第一极耳电连接的第一电极端子以及与所述第二极耳电连接的第二电极端子，所述第一电极端子与所述第一盖板、所述壳体电连接，所述第二电极端子与所述第一盖板、所述壳体绝缘设置。
  13. 根据权利要求12所述的二次电池，其中，所述二次电池还包括第 二盖板，所述壳体具有与所述容纳腔连通的第二开口，并且所述第二开口和所述第一开口分别位于所述壳体沿所述二次电池高度方向的两端，所述第二盖板盖设于所述第二开口处，所述第一电极端子和所述第二电极端子均设置于所述第二盖板，所述第一极耳依次通过所述第一盖板、所述壳体、所述第二盖板与所述第一电极端子电连接，所述第二极耳与所述第二盖板绝缘设置。
  14. 一种电池模块，包括框架和多个如权利要求1～13任一项所述的二次电池，所述多个二次电池在所述框架内并排设置。
  15. 一种电池组，包括壳箱体和位于所述箱体内的多个如权利要求1～13任一项所述的二次电池。
  16. 一种使用二次电池作为电源的装置，包括容纳部以及位于容纳部内的多个如权利要求1～13任一项所述的二次电池。
  17. 一种二次电池的制造方法，包括：
    装配电极单元的步骤，将所述电极单元设置于壳体的容纳腔内，所述电极单元包括主体部和从所述主体部延伸出的第一极耳和第二极耳，所述壳体具有和所述容纳腔连通的第一开口，令所述第一极耳朝向所述第一开口；
    盖设第一盖板的步骤，将第一盖板盖设于所述第一开口处，所述第一盖板具有贯穿设置的第一让位孔，令所述第一极耳由所述第一让位孔穿过并连接于所述第一盖板背离所述容纳腔的一侧；
    密封步骤，将密封板密封连接于所述第一盖板背离所述容纳腔的一侧，并令所述密封板覆盖所述第一让位孔。
  18. 根据权利要求17所述二次电池的制造方法，其中，在所述盖设第一盖板的步骤之前还包括：
    冲压所述第一盖板，以在所述第一盖板表面形成第一凹部，所述第一凹部具有底板，并且所述第一让位孔位于所述底板沿所述二次电池厚度方向的一侧；
    在盖设第一盖板的步骤中还包括：将所述第一盖板盖设于所述第一开口处，并令所述第一凹部位于所述第一盖板背离所述容纳腔的一侧，将所 述第一极耳从所述第一让位孔穿过，所述第一极耳具有连接部和固定部，所述连接部穿设于所述第一让位孔内，将所述固定部相对所述连接部弯折，令所述固定部设置于所述第一凹部内、并连接于所述底板。
  19. 根据权利要求18所述二次电池的制造方法，其中，在所述盖设第一盖板的步骤之前还包括：
    将隔离板盖设于所述第一开口处，所述隔离板上贯穿设置有第二让位孔，令所述第一极耳穿过所述第二让位孔；
    所述盖设第一盖板的步骤还包括：在所述隔离板上继续盖设第一盖板，令所述第一极耳依次穿过所述第二让位孔和所述第一让位孔。
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CN112310517B (zh) 2024-02-20
EP3836297A4 (en) 2021-09-29
EP3836297A1 (en) 2021-06-16
JP7477604B2 (ja) 2024-05-01
EP3836297B1 (en) 2023-03-08
KR20220060545A (ko) 2022-05-11

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