WO2021203599A1 - 电池、电池组、用电设备和电池的制造方法 - Google Patents

电池、电池组、用电设备和电池的制造方法 Download PDF

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Publication number
WO2021203599A1
WO2021203599A1 PCT/CN2020/108155 CN2020108155W WO2021203599A1 WO 2021203599 A1 WO2021203599 A1 WO 2021203599A1 CN 2020108155 W CN2020108155 W CN 2020108155W WO 2021203599 A1 WO2021203599 A1 WO 2021203599A1
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Prior art keywords
adapter
battery
electrode assembly
end surface
adapter portion
Prior art date
Application number
PCT/CN2020/108155
Other languages
English (en)
French (fr)
Inventor
陈元宝
李全坤
王鹏
姜玲燕
Original Assignee
宁德时代新能源科技股份有限公司
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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 EP20808003.6A priority Critical patent/EP3916891B1/en
Priority to ES20808003T priority patent/ES2949951T3/es
Priority to FIEP20808003.6T priority patent/FI3916891T3/fi
Priority to KR1020227019152A priority patent/KR102642373B1/ko
Priority to JP2022536845A priority patent/JP7391227B2/ja
Priority to PL20808003.6T priority patent/PL3916891T3/pl
Priority to US17/059,076 priority patent/US20210359379A1/en
Publication of WO2021203599A1 publication Critical patent/WO2021203599A1/zh
Priority to JP2023195792A priority patent/JP2024003250A/ja

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells 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
    • H01M50/20—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
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted 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
    • H01M50/50—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
    • 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
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/591—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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • H01M50/645—Plugs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the embodiments of the present application relate to the field of batteries, and in particular to a method for manufacturing batteries, battery packs, electrical equipment, and batteries.
  • secondary batteries such as cylindrical lithium-ion batteries are widely used in electric vehicles (such as electric vehicles, electric tricycles, or electric bicycles).
  • the electrolyte needs to enter between the cell pole pieces through the end face of the cell to achieve the infiltration process.
  • the embodiments of the present application aim to provide a battery, a battery pack, an electrical device, and a manufacturing method of the battery, so as to improve the infiltration efficiency of the battery.
  • the adapter component includes a first adapter portion for electrical connection with the electrode assembly and a second adapter portion for electrical connection with the electrode terminal.
  • the first adapter portion is folded relative to the second adapter portion along the crease state;
  • the crease is located between the first end surface and the second end surface of the first adapter part
  • the second end surface and the first end surface are arranged side by side along the length direction.
  • a first notch is provided on a side of the first adapter part close to the second adapter part, and the crease extends to the first notch.
  • the first notch when the adapter component is in the expanded state, extends along the length direction or a direction intersecting the length direction.
  • the second end surface is away from the second adapter portion relative to the first end surface, and along the direction from the first end surface to the second end surface, the first notch is inclined toward the middle of the width direction of the adapter component.
  • the first notch includes an arc-shaped notch, and the contour of the arc-shaped notch is arc-shaped.
  • the first adapter portion includes a protruding portion, and the protruding portion protrudes from the second adapter portion along the width direction of the adapter component.
  • the first adapter portion includes a connecting portion, and the connecting portion is used to connect with the electrode assembly.
  • the connecting portion is Protruding from the crease.
  • the projection of the adapter part and the projection of the liquid injection hole do not overlap, and the liquid injection hole is used for injecting electrolyte.
  • the projection of the adapter component and the projection of the hole plug do not overlap, and the hole plug extends into the liquid injection hole and penetrates from the side of the liquid injection hole close to the electrode assembly.
  • the battery further includes a guard, and the guard is used to prevent the hole plug from contacting the adapter part.
  • the battery further includes a first insulating member located on a side of the end cover of the battery close to the electrode assembly.
  • the first insulating member includes an insulating body and a limiting ring.
  • the limiting ring is opposite to the insulating body. It protrudes toward the direction of the electrode assembly and is arranged on the periphery of the adapter component to prevent the adapter component from contacting the battery casing.
  • the limit ring is disposed on the periphery of the end of the electrode assembly close to the end cap.
  • the first insulator further includes a supporting part disposed on the insulating body, and the supporting part protrudes from the insulating body in the direction of the electrode assembly, and is supported between the insulating body and the first transition part.
  • the support part and the inner surface of the stop ring are arranged at intervals, or the support part is in contact with the inner surface of the stop ring.
  • the insulating body is provided with a weight-reducing groove, and the weight-reducing groove is recessed from the end surface of the insulating body away from the electrode assembly toward the electrode assembly.
  • the battery includes an end cover.
  • the end cover includes a body portion, a first boss and a second boss.
  • the platform protrudes toward one side of the electrode assembly, and the liquid injection hole penetrates the first boss and the second boss.
  • the battery pack provided by the embodiment of the present application includes the battery of the embodiment of the present application.
  • the electrical equipment provided in the embodiment of the present application includes the battery pack of the embodiment of the present application, and the battery pack is used to provide electrical energy.
  • the first transition portion is bent between the first end surface and the second end surface of the first transition portion relative to the second transition portion.
  • Fig. 1 shows a schematic diagram of the structure of an electrical device in some embodiments of the present application.
  • Fig. 2 shows an exploded view of the battery pack in Fig. 1.
  • Fig. 3 shows a perspective view of the battery in Fig. 2.
  • Fig. 4 shows an exploded view of the battery in Fig. 3.
  • Fig. 5 shows a perspective view of the top cover assembly corresponding to the first tab in Fig. 4.
  • Fig. 6 shows an exploded view of the top cover assembly shown in Fig. 5 when the adapter part is in an unfolded state.
  • Fig. 7 shows a side view of the adapter part in Fig. 6 when it is in an unfolded state.
  • FIG. 8 shows a schematic diagram of the first, second, and third adapter parts of the adapter component in FIG. 7 when relatively bent.
  • Fig. 9 shows a schematic diagram of the adapter part in Fig. 7 when it is in a folded state.
  • Fig. 10 shows a top view of the adapter part in Fig. 6 when it is in an unfolded state.
  • FIG. 11 shows a partial enlarged schematic diagram of I in FIG. 10.
  • Fig. 12 shows a perspective view of the first insulating member in Fig. 6.
  • Fig. 13 shows a perspective view of the end cap in Fig. 6.
  • Fig. 14 shows a bottom view of the battery in Fig. 3.
  • Fig. 15 shows a partial schematic diagram of Fig. 14 when cut at A-A.
  • FIG. 16 shows a partial enlarged schematic diagram of II in FIG. 15.
  • Fig. 17 shows a partial schematic diagram of Fig. 14 when cut at B-B.
  • Fig. 18 shows a partial schematic diagram of Fig. 14 when cut at C-C.
  • FIG. 19 shows a perspective view of the top cover assembly corresponding to the first tab in some other embodiments of the present application.
  • Fig. 20 shows an exploded view of the top cover assembly in Fig. 19.
  • FIG. 21 shows a bottom view of the adapter part in FIG. 20.
  • Fig. 22 shows a top view of the adapter part shown in Fig. 21 when it is in an unfolded state.
  • FIG. 23 shows a partial enlarged view of III in FIG. 22.
  • FIG. 24 shows a first perspective view of a first insulating member in still other embodiments of the present application.
  • FIG. 25 shows a second perspective view of the first insulating member shown in FIG. 24.
  • Fig. 26 shows a method of manufacturing a battery in an embodiment of the present application.
  • the battery generally includes a case, an electrode assembly, an electrode terminal, and an adapter component.
  • the electrode assembly is arranged inside the casing and is electrically connected to the electrode terminal through the adapter part.
  • the electrode terminals are exposed outside the casing for electrical connection with external circuits.
  • the electrolyte is injected into the shell and enters between the pole pieces of the electrode assembly, and undergoes an electrochemical reaction with the active material on the pole pieces to produce a charge and discharge process.
  • the process in which the electrolyte enters the electrode assembly is called the infiltration process, and the speed at which the electrolyte enters the electrode assembly is called the infiltration efficiency.
  • the adapter part is configured to be bendable, while in the related art, the folded adapter part is opposite to the electrode assembly.
  • the end face has more occlusion, which affects the infiltration efficiency.
  • the embodiments of the present application improve the structure of the battery to improve the wetting efficiency of the battery.
  • Figures 1-26 exemplarily show the structure of the electrical equipment, the battery pack and the battery and the manufacturing method of the battery according to the embodiments of the present application.
  • the coordinate axis L represents the first direction.
  • the arrangement direction of the second adapter portion 132 is also, in some embodiments, the length direction of the adapter component 13 when it is in the unfolded state;
  • the coordinate axis H represents the second direction, which is perpendicular to the first direction L and the third direction W , Is the stacking direction of the first adapter portion 131 and the second adapter portion 132 when the adapter component 13 is in the folded state.
  • the coordinate axis W represents the third direction, which is perpendicular to the first direction L and the second direction H, and, in some embodiments, is also the width direction of the adapter part 13.
  • an embodiment of the present application provides an electric device 100 that uses a battery pack 102 as a power source.
  • the electrical equipment 100 includes an equipment body 101 and a battery pack 102.
  • the battery pack 102 is arranged on the device body 101 and is used to provide electrical energy.
  • the electric device 100 is, for example, a mobile device such as a vehicle, a ship, a small aircraft, etc., which includes a power source, and the power source includes a battery pack 102 that is used to provide electrical energy and provide driving force for the electric device 100.
  • the driving force of the electric device 100 is all electric energy, and in this case, the power source only includes the battery pack 102.
  • the driving force of the electrical equipment 100 includes electric energy and other energy sources (for example, mechanical energy), and the power source includes other power equipment such as a battery pack 102 and an engine. 1, taking a vehicle as an example, in some embodiments, the electrical equipment 10 is a new energy vehicle, such as a pure electric vehicle, a hybrid electric vehicle, a range extension vehicle, an electric tricycle, or a two-wheel electric vehicle.
  • the electric device 100 may also be an energy storage device such as a battery cabinet, which includes a battery pack 102, and the number of the battery pack 102 is one, two or more, so that the battery cabinet can output electric energy.
  • a battery cabinet which includes a battery pack 102, and the number of the battery pack 102 is one, two or more, so that the battery cabinet can output electric energy.
  • the battery pack 102 includes a box 102a and a battery 10, and the battery 10 is contained in the box 102a.
  • the box body 102a includes a sleeve 102b, a first box cover 102c, and a second box cover 102d.
  • the sleeve 102b is, for example, an aluminum shell with a hollow interior, and both ends of the sleeve 102b opposite to each other in the second direction H are open.
  • the first box cover 102c and the second box cover 102d respectively cover the opposite ends of the sleeve 102b along the second direction H, and close the opposite ends of the sleeve 102b along the second direction H, so that the box body 102a A closed space is formed inside to accommodate the battery 10 and the like.
  • the closure here refers to covering or closing, which can be sealed or unsealed.
  • the first box cover 102c When applied to electrical equipment 10 such as two-wheeled electric vehicles, generally, the first box cover 102c is on the top, the second box cover 102d is on the bottom, that is, the first box cover 102c is the top cover, and the second box cover 102d is the bottom. cover.
  • the first box cover 102c is opened and closed to maintain or replace structural components such as the battery 10 and the like inside the box body 102a.
  • the shape of the box 102a can be various.
  • the box 102a has a cubic shape as a whole.
  • the sleeve 102b is in the shape of a hollow cube with open ends, and includes four side plates connected end to end in turn. The four side plates enclose a cavity, and two adjacent side plates are perpendicular to each other. .
  • the height direction of the sleeve 102b is along the second direction H.
  • the shape of the first cover 102c matches the shape of the top opening of the sleeve 102b.
  • the shape of the second box cover 102d matches the shape of the bottom opening of the sleeve 102b.
  • the battery 10 is housed in the box 102a and is a core structural component of the battery pack 102 for providing electrical energy.
  • the number of batteries 10 may be one, two or more.
  • a plurality of batteries 10 are provided in the box 102a to provide more power.
  • the battery 10 is a cylindrical battery with an axial direction along the second direction H, and it includes a housing 3, an electrode assembly 2, an end cap assembly 1, and the like.
  • the housing 3 is provided with a cavity 31 for accommodating the electrode assembly 2 and the like.
  • the case 3 is configured in a cylindrical shape.
  • the electrode assembly 2 is disposed in the cavity 31 of the housing 3, for example, a first pole piece, a second pole piece, and an insulating spacer located between the first pole piece and the second pole piece are stacked or wound together.
  • One of the first pole piece and the second pole piece is a positive electrode piece, and the other is a negative electrode piece, and both have a first part coated with an active material and a first part that is not coated with an active material extending outward from the first part.
  • the electrode assembly 2 includes a cell body 22 and a tab 21. Wherein, the cell body 22 is coated with an active material, which corresponds to the first part of the first pole piece and the second pole piece, and is used to generate electric energy.
  • the tab 21 is located at the end of the cell body 22 and extends from the cell body 22 to the outside, and the tab 21 is not coated with active material, corresponding to the first pole piece and the second part of the second pole piece, for The electric energy generated by the battery core body 22 is transferred to the outside.
  • the tab 21 generally includes a first tab 21a and a second tab 21b, one of the first tab 21a and the second tab 21b is used as a positive tab, and the other is used as a negative tab. 4, in some embodiments, the first tab 21a and the second tab 21b are located at opposite ends of the battery body 22 along the second direction H, respectively. In addition, referring to FIG. 4, in some embodiments, in the direction away from the cell body 22, the cross-sectional areas of the first tab 21 a and the second tab 21 b gradually decrease, narrowing toward the center of the electrode assembly 2.
  • the end cap assembly 1 is disposed at the end of the housing 3 and is used to seal the cavity 31 to protect the electrode assembly 2 and seal the housing 3.
  • the battery 10 includes two end cover assemblies 1, which are respectively covered with The opposite ends of the housing 31 along the second direction H correspond to the first tab 21a and the second tab 21b respectively, and can also be referred to as the first end cover assembly and the second end cover assembly, respectively, for easy distinction .
  • the end cap assembly 1 includes an end cap 11, an electrode terminal 12, an adapter component 13, and the like.
  • the end cover 11 closes the end opening of the housing 3. 4, in some embodiments, the structure of the end caps 11 of the first end cap assembly and the second end cap assembly are not completely the same.
  • the end cap 11 of the first end cap assembly is provided with a liquid injection hole 11b for power supply solution injection, while the end cap 11 of the second end cap assembly is not provided with a liquid injection hole 11b, and It is equipped with an explosion-proof valve 18.
  • the end cover 11 of the second end cover assembly may be provided with a liquid injection hole 11 b, and the end cover 11 of the first end cover assembly may be provided with an explosion-proof valve 18.
  • the electrode terminal 12 is arranged on the end cover 11 and is electrically connected to the electrode assembly 2 through the adapter member 13 to realize the electrical connection between the electrode assembly 2 and an external circuit.
  • the end cover 11 is provided with an electrode lead-out hole 11 a, and the electrode terminal 12 extends into the electrode lead-out hole 11 a to realize the connection with the end cover 11.
  • the end cover 11 is provided with two electrode extraction holes 11a, and the two electrode extraction holes 11a correspond to the two electrode terminals 12 respectively, that is, the two electrode terminals 12 respectively extend into two One electrode is drawn out of the hole 11a.
  • a sealing ring 19 is further provided in each electrode lead-out hole 11 a to achieve a seal between the electrode terminal 12 and the end cap 11.
  • the adapter member 13 is arranged on the side of the end cover 11 close to the electrode assembly 2 and is used to electrically connect the electrode assembly 2 and the electrode terminal 12.
  • the adapter part 13 is configured to be foldable. In other words, the adapter part 13 has an unfolded state and a folded state. 13 is in an unfolded state, and after being assembled into a finished battery 10, the adapter part 13 is in a folded state.
  • the adapter component 13 includes a first adapter portion 131 and a second adapter portion 132.
  • the first adapter portion 131 is used to electrically connect with the electrode assembly 2 (specifically, the tab 21).
  • the second transfer portion 132 is used for electrically connecting with the electrode terminal 12.
  • first adapter portion 131 is bendable relative to the second adapter portion 132, and the two are bent to form a crease 131c, that is, the first adapter portion 131 and the second adapter portion 132 face each other at the crease 131c Bend.
  • first adapter portion 131 and the second adapter portion 132 are in a folded state.
  • the first adapter portion 131 covers the end surface of the electrode assembly 2, and the second adapter portion 132 is stacked on the side of the first adapter portion 131 away from the electrode assembly 2.
  • the adapter member 13 is configured as an adapter piece, the first adapter portion 131 is substantially in the shape of a disk, and the second adapter portion 132 is substantially in the shape of an elongated strip.
  • the first adapter portion 131 protrudes from the second adapter portion 132 in the third direction W, that is, the width of the first adapter portion 131 is larger than that of the second adapter portion 132 width.
  • the first adapter portion 131 includes a protruding portion 131 h, and the protruding portion 131 h protrudes from the second adapter portion 132 along the third direction W. More specifically, the two protruding portions 131h are located on both sides of the second transition portion 132 along the second direction W, respectively.
  • the protruding portion 131h includes a first end surface 131e and a second end surface 131f opposite along the first direction L, that is, the first end surface 131e and the second end surface 131f are arranged along the first direction (ie, the length direction) L.
  • the second end surface 131f is far away from the second adapter portion 132 relative to the first end surface 131e.
  • the first adapter portion 131 may also not protrude from the second adapter portion 132 in the third direction W, that is, the width of the first adapter portion 131 is less than or equal to the width of the first adapter portion 131.
  • the width of the second transition portion 132 may also not protrude from the second adapter portion 132 in the third direction W, that is, the width of the first adapter portion 131 is less than or equal to the width of the first adapter portion 131.
  • the width of the second transition portion 132 may also not protrude from the second adapter portion 132 in the third direction W, that is, the width of the first adapter portion 131 is less than or equal to the width of the first adapter portion 131.
  • the width of the second transition portion 132 may also not protrude from the second adapter portion 132 in the third direction W, that is, the width of the first adapter portion 131 is less than or equal to the width of the first adapter portion 131.
  • the width of the second transition portion 132 may also not
  • the crease 131c is located on the side of the first end surface 131e away from the second end surface 131f, or located at the first end surface 131e.
  • the part of the first adapter portion 131 between the first end surface 131e and the second end surface 131f completely covers the end surface of the electrode assembly 2. Because of the large number of shielding, the electrolyte enters the inside of the electrode assembly 2 from the end surface of the electrode assembly 2 at a slower rate, which affects the infiltration efficiency of the battery 10.
  • the crease 131c is located between the first end surface 131e and the second end surface 131f.
  • the part of the first adapter portion 131 between the first end surface 131e and the second end surface 131f no longer completely shields the end surface of the electrode assembly 2, but the first end surface 131e
  • the part between the crease 131c and the crease 131c is bent, and no longer shields the end surface of the electrode assembly 2. Therefore, it is beneficial to accelerate the infiltration rate of the electrolyte and improve the infiltration efficiency of the battery 10.
  • positioning the crease 131c between the first end surface 131e and the second end surface 131f is also beneficial to shorten the size (ie, the length) of the second transition portion 132 in the first direction L, and reduce the resistance of the battery 10.
  • the crease 131c is located between the first end surface 131e and the second end surface 131f, which also facilitates the avoidance of the adapter member 13 to the liquid injection hole 11b, which is beneficial to improve the liquid injection efficiency.
  • the crease 131c is located on the side of the first end surface 131e away from the second end surface 131f, or roughly flush with the first end surface 131e, so that after bending, a part of the adapter member 13 is exactly located at the injection hole 11b. Directly below, this causes the adapter member 13 to block the electrolyte injected through the injection hole 11b during the injection process, which affects the injection efficiency.
  • the crease 131c is located between the first end surface 131e and the second end surface 131f, which facilitates the folding of the adapter part 13 no longer just below the injection hole 11b, thereby reducing the position of the adapter part 13 It blocks the electrolyte during the injection process and improves the efficiency of injection.
  • the projection and the injection of the adapter component 13 does not overlap, in other words, after bending (that is, when the adapter member 13 is in the folded state), the projection of the liquid hole 11b on the surface perpendicular to the second direction H does not overlap with the adapter member 13 .
  • the adapter member 13 can avoid the liquid injection hole 11b, which reduces the barrier to the electrolyte during the liquid injection process, and facilitates the electrolyte to be more smoothly injected into the housing 3 through the liquid injection hole 11b. Thereby improving the efficiency of liquid injection.
  • the first adapter portion 131 At least one first notch 131d is provided thereon, and the at least one first notch 131d is located on at least one side of the crease 131c along the third direction W.
  • the first notch 131 d is provided on the side of the first adapter portion 131 close to the second adapter portion 132.
  • the crease 131c extends to the first notch 131d.
  • the first adapter portion 131 and the second adapter portion 132 can be more conveniently and accurately bent at the crease 131c between the first end surface 131e and the second end surface 131f. fold.
  • the side of the first adapter portion 131 close to the second adapter portion 132 is provided with two first notches 131d, and the two first notches 131d are respectively located at Two sides of the crease 131c along the third direction W, that is, two ends of the crease 131c along the third direction W are respectively provided with a first notch 131d.
  • two ends of the crease 131c (specifically, two ends along the third direction W) respectively extend to the two first notches 131d.
  • the two first notches 131d may be symmetrically arranged on both sides of the crease 131c along the third direction W. Based on this, during the relative bending process, the first adapter portion 131 and the second adapter portion 132 are less prone to skew.
  • the first notch 131d when the adapter member 13 is in the unfolded state, the first notch 131d extends along the first direction L, or, referring to FIGS. 22-23, in other embodiments, When the adapter member 13 is in the unfolded state, the first notch 131d extends along the direction intersecting the first direction L.
  • the first notch 131d extends along a direction intersecting the first direction L, in some embodiments, along the direction from the first end surface 131e to the second end surface 131f, the first A notch 131d is inclined toward the middle of the third direction W of the adapter member 13. In this way, the width at the crease 131c is smaller, which facilitates the relative bending of the first adapter portion 131 and the second adapter portion 132 at the crease 131c.
  • the specific shape of the first notch 131d can be varied.
  • the contour lines of the first notch 131d are all straight lines, and the width of each section of the first notch 131d is substantially the same.
  • the first notch 131d includes an arc-shaped notch 131i, and the contour of the arc-shaped notch 131i is arc-shaped.
  • the arc-shaped notch 131i is located at an end of the first notch 131d close to the second end surface 131f, that is, the portion of the first notch 131d near the second end surface 131f is configured as the arc-shaped notch 131i. In this way, it not only facilitates the processing of the first notch 131d, but also helps to reduce stress concentration, improve the stress state of the adapter component 13 and enhance the carrying capacity of the adapter component 13. Specifically, continuing to refer to refer to FIGS.
  • the first notch 131d further includes a first notch section 131j, and the first notch section 131j and the arc-shaped notch portion 131i extend from the first end surface 131e to the second end surface 131f.
  • the directions of are connected in sequence, and the first notch section 131j is configured as a non-arc notch.
  • the arc-shaped notch 131i can also be referred to as a second notch section.
  • the size (ie, the width) of the first notch section 131j along the third direction W gradually becomes smaller.
  • the connection between the first notch section 131j and the arc-shaped notch 131i may be provided with rounded corners to further improve the stress concentration phenomenon.
  • the adapter component 13 further includes a third adapter portion 133, and the second adapter portion 132 is electrically connected to the electrode terminal 12 through the third adapter portion 133. connect.
  • the second adapting portion 132 can be bent relative to the third adapting portion 133. At this time, the second adapting portion 132 can be bent relative to the first adapting portion 131 and the third adapting portion 133.
  • the third adapter portion 133 is connected to the end of the second adapter portion 132 away from the first adapter portion 131, in other words, the first adapter portion 131 and the second adapter portion 131
  • the adapter portion 132 and the third adapter portion 133 are arranged along the first direction L and connected in sequence; and when the adapter component 13 is in the folded state, the first adapter portion 131 covers the end surface of the electrode assembly 2, and The second adapter portion 132 is stacked on the side of the first adapter portion 131 away from the electrode assembly 2, and the third adapter portion 133 is overlapped on the side of the second adapter portion 132 away from the electrode assembly 2. That is, the second adapter portion 132 and the third adapter portion 133 are sequentially stacked on the side of the first adapter portion 131 away from the electrode assembly 2 along the direction away from the electrode assembly 2.
  • the first adapter portion 131 is provided with a through hole 131b and a connecting portion 13d.
  • the through hole 131b penetrates the first adapter portion 131 along the second direction H, which facilitates positioning on the one hand, and facilitates the flow of electrolyte on the other hand.
  • the relative positional relationship between the adapter part 13 and the electrode assembly 2 in the first direction L and the third direction W can be determined based on the through hole 131b.
  • the through hole 131b can be connected to the winding center of the electrode assembly 2. Aligned.
  • the electrolyte can flow to the electrode assembly 2 through the through hole 131b, which improves the infiltration efficiency and the injection efficiency.
  • the connecting portion 13d is used to connect to the electrode assembly 2, that is, the first adapter portion 131 is connected to the electrode assembly 2 through the connecting portion 13d.
  • the connecting portion 13d and the electrode assembly 2 can be connected by welding or riveting.
  • the connecting portion 13d is a boss of the first adapter portion 131 protruding toward the electrode assembly 2 to further facilitate the welding of the connecting portion 13d and the tab 21.
  • the connecting portion 13d may be formed by stamping. After stamping, the surface of the first connecting portion 131 away from the electrode assembly 2 forms a groove 131a, and the connecting portion 13d and the groove 131a are correspondingly arranged in the thickness direction of the adapter component 13.
  • the groove 131a is V-shaped.
  • At least part of the connecting portion 13d is located on the protruding portion 131h, that is, in the third direction W, the connecting portion 13d also protrudes from the crease 131c.
  • the groove 131a protrudes from the crease 131c. Since the connecting portion 131d corresponds to the groove 131a, the connecting portion 13d also protrudes from the crease 131c, in other words, in the first direction On L, the connecting portion 13d extends to the side of the crease 131c close to the first end surface 131e.
  • the crease 131c can be located between the first end surface 131e and the second end surface 131f to improve the infiltration efficiency, and it is also conducive to making the connecting portion 13d and the tab 21 have a larger connecting area, and strengthening the connecting portion 13d and The reliability of the connection between the tabs 21 improves the overcurrent capability of the battery 10.
  • two connecting portions 13 d are provided on the first adapter portion 131, and the two connecting portions 13 d are symmetrically disposed on the first adapter portion 131.
  • the two connecting portions 13d are disposed on the first adapter portion 131 and are arranged symmetrically with respect to the through hole 131b.
  • a third gap 13e is provided between the second end surfaces 131f of the two protruding portions 131h of the first adapter portion 131, and the third gap 13e extends along the The two end surfaces 131f are recessed in the direction of the first end surface 131e.
  • the third gap 13e is located on the side of the explosion-proof valve 18 close to the electrode assembly 2, so that high-pressure gas can act on the explosion-proof valve 18, so that the explosion-proof valve 18 can be opened at a predetermined pressure more reliably.
  • the third adapter portion 133 is provided with a first connection hole 133a, the first connection hole 133a corresponds to the electrode terminal 12 one-to-one, the electrode terminal 12 penetrates Through the first connection hole 133a, the connection between the third transfer portion 133 and the electrode terminal 12 is realized.
  • the third adapter portion 133 is also configured in a disk shape and has a greater width than the second adapter portion 132.
  • the third adapter portion 133 and the second adapter portion 132 are connected with The second gap 132a.
  • the second gap 132a extends from the edge of the second adapter portion 132 along the third direction W to the middle portion of the second adapter portion 132 along the third direction W, that is, the second gap 132a extends from the edge of the second adapter portion 132.
  • the edge in the third direction W is recessed toward the middle of the second adapter portion 132 along the third direction W.
  • a second gap 132a is provided on both sides of the second adapter portion 132 along the third direction W, that is, two second gaps 132a are provided in the second Both sides of the transfer portion 132 along the third direction W. In this way, the third adapter portion 133 and the second adapter portion 132 can be relatively bent more conveniently at the second notch 132a.
  • the end cap assembly 1 further includes a first insulating member 15, a second insulating member 16, a connecting block 17, a hole plug 141, and the like.
  • the first insulating member 15 and the second insulating member 16 are respectively located on the side of the end cover 11 close to and far away from the electrode assembly 2 to perform an insulating function to reduce the risk of short circuit.
  • the first insulating member 15 and the second insulating member 16 may be made of insulating materials such as plastic.
  • the first insulating member 15 includes an insulating body 151 and a limiting ring 152 and a supporting portion 153 provided on the insulating body 151.
  • the insulating body 151 is approximately circular. Also, referring to FIGS. 6, 12 and 18, the insulating body 151 is provided with a second connection hole 151a, and the electrode terminal 12 passes through the second connection hole 151a.
  • the second connection holes 151a correspond to the electrode terminals 12 on a one-to-one basis.
  • the limit ring 152 is used to limit the lateral displacement (ie, the displacement in a plane perpendicular to the second direction H) of the adapter component 13 and the like, so as to reduce the risk of short circuit. 5, 12, 16 and 19, the limit ring 152 protrudes relative to the insulating body 151 toward the electrode assembly 2 and is arranged on the periphery of the adapter part 13 to prevent the adapter part 13 and the housing
  • the body 3 is in contact with each other so as to avoid contact between the adapter component 13 and the housing 3 in the event of the battery 10 shaking or the adapter component 13 being deflected, which may cause a short circuit problem.
  • the inner diameter of the limit ring 152 is larger than the maximum dimensions of the adapter member 13 in the folded state along the first direction L and the third direction W, and the limit ring 152
  • the insulating body 151 extends to the side of the electrode assembly 2 to the side of the first adapter portion 131 close to the electrode assembly 2, so that the limiting ring 152 is arranged around the periphery of the first adapter portion 131.
  • the entirety of the adapter part 13 in the folded state is within the range defined by the limit ring 152, so that the limit ring 152 can restrict the lateral displacement of the adapter part 13 to a certain extent, preventing the adapter part 13 is in contact with the housing 3 due to excessive lateral displacement.
  • the limiting ring 152 not only extends to the side of the first adapter portion 131 close to the electrode assembly 2, but also extends to the end of the tab 21 close to the end cap 11.
  • the limit ring 152 is not only arranged around the periphery of the adapter member 13, but also on the periphery of the end of the tab 21 close to the end cap 11, so that the limit ring 152 can limit the lateral displacement of the adapter member 13 at the same time, It also limits the lateral displacement of the electrode assembly 2 to prevent the electrode assembly 2 from contacting the housing 3 due to excessive lateral displacement, causing short circuit problems, and preventing the tabs 21a from bending towards the housing 3 Cause the problem of short circuit.
  • the limit ring 152 is configured as a continuous ring, but at the same time, the limit ring 152 is a non-closed ring, and the two free ends of the limit ring 152 are provided
  • the extension opening 152a is used for extending the second adapting portion 132 of the adapting component 13 in the unfolded state. Based on this, the stop ring 152 can reliably limit the lateral displacement of the adapter member 13 and the like, reduce the risk of short circuit, and at the same time facilitate the adapter member 13 to be assembled into the end cover assembly 1 in an unfolded state, and then folded.
  • the support portion 153 is used to limit the longitudinal displacement of the electrode assembly 2 and the like (ie, displacement in the second direction H), and prevent the longitudinal displacement of the electrode assembly 2 from being too large, which affects the performance and safety of the battery 10.
  • the supporting portion 153 protrudes toward the electrode assembly 2 relative to the insulating body 151 and is supported between the insulating body 151 and the first transition portion 131. In this way, the support portion 153 abuts against the first adapter portion 131 to limit the longitudinal displacement of the electrode assembly 2, which is beneficial to reduce the shaking of the electrode assembly 2 and enables the battery 10 to work more safely and reliably.
  • the support portion 153 is configured as an arc-shaped section. At this time, the contact area between the support portion 153 and the first adapter portion 131 is larger, so that the electrode assembly 2 can be restricted more reliably. The longitudinal displacement.
  • the insulating body 151 is provided with two supporting parts 153, and the two supporting parts 153 are arranged oppositely on both sides of the second adapter part 132 to make it more stable.
  • the first transfer portion 131 is abutted and limited.
  • the supporting portion 153 is located between the stop ring 152 and the second connecting hole 151 a, and the two supporting portions 153 are arranged symmetrically about the center of the insulating body 151.
  • the two support parts 153 are both located inside the limit ring 152 and are opposite to each other, and can be more stably supported between the insulating body 151 and the first adapter part 131, and the first adapter part 131 is more stable. Reliably abut the limit.
  • the support portion 153 and the inner surface of the stop ring 152 are spaced apart.
  • the support portion 153 is in contact with the inner surface of the stop ring 152. Comparing Figures 12 and 24, it can be seen that under the premise that the radial distance between the support portion 153 and the center of the insulating body 151 remains unchanged, when the support portion 153 is spaced apart from the inner surface of the stop ring 152, it changes to When the inner surface of the ring 152 is in contact, the radial width of the support portion 153 is increased. In this way, the surface area of the support portion 153 for contacting the first adapter portion 131 is increased. Therefore, the first rotation can be more reliably adjusted.
  • the connecting portion 131 abuts and limits the position.
  • the insulating body 151 is provided with a weight reduction groove 154, and the weight reduction groove 154 is recessed toward the electrode assembly 2 by the end surface of the insulating body 51 away from the electrode assembly 2.
  • the weight-reducing groove 154 provided can reduce the weight of the first insulating member 15 on the one hand, thereby reducing the weight of the battery 10, and on the other hand, when the first insulating member 15 is processed by injection molding, it can also prevent the first insulating Sink marks were generated when part 15 was injection molded.
  • the weight reduction groove 154 includes at least two groove sections 154a, and the at least two groove sections 154a are arranged along the circumference of the insulating body 151.
  • the insulating body 151 is provided with two weight-reducing grooves 154.
  • the two weight-reducing grooves 154 are located on both sides of the center of the insulating body 151 and are opposite to each other, that is, the two The weight-reducing grooves 154 are symmetrically arranged with respect to the center of the insulating body 151. In this way, the weight can be reduced more fully and the injection sink marks can be prevented more effectively.
  • the insulative body 151 is provided with a weight-reducing groove 154 and a supporting portion 153 at the same time.
  • the weight-reducing grooves 154 and the supporting portions 153 are provided in one-to-one correspondence.
  • the weight-reducing groove 154 and the supporting portion 153 are respectively provided on the two axial end surfaces of the insulating body 151, the circumferential and radial positions of the two are the same, and the circumferential and radial dimensions of the two are the same. In this way, even when the thickness of the support portion 153 is large, the weight reduction groove 154 can effectively reduce the weight and prevent sink marks.
  • the second insulating member 16 and the connecting block 17 are arranged on the end cover 11, and are arranged in sequence along the direction away from the electrode assembly 2. That is, the second insulating member 16 is located between the connecting block 17 and the end cover 11 for realizing the The insulation between the cover 11 and the connection block 17.
  • a third connecting hole 161 and a fourth connecting hole 171 are respectively provided on the second insulating member 16 and the connecting block 17.
  • the third connection hole 161 and the fourth connection hole 171 are both provided in a one-to-one correspondence with the electrode terminal 12.
  • the electrode terminal 12 protrudes from the electrode lead-out hole 11a, and passes through the third connection hole 161 and the fourth connection hole 171 in sequence to realize the connection with the second insulating member 16 and the connection block 17.
  • the hole plug 141 is used to seal the liquid injection hole 11b. As shown in FIG. 16, the hole plug 141 extends into the liquid injection hole 11 b and penetrates from the side of the liquid injection hole 11 b close to the electrode assembly 2. After the injection is completed, the plug 141 is inserted into the injection hole 11b to prevent the injected electrolyte from flowing out of the injection hole 11b and leaking.
  • the end cap assembly 1 further includes a blocking member 142, which is disposed on the end cap 11 and blocks the liquid injection hole 11b away from the electrode assembly 2. ⁇ axial end face.
  • the blocking member 142 is disposed at an end of the hole plug 141 away from the electrode assembly 2 and is connected to the end cap 11. Based on this, the blocking member 142 can improve the sealing effect of the liquid injection hole 11b, and at the same time can reduce the risk of the plug 141 falling off.
  • the blocking member 142 plays a sealing role, it also restricts the displacement of the hole plug 141 to the side away from the electrode assembly 2 to prevent the hole plug 141 from falling out of the liquid injection hole 11b, which is beneficial to further improve the sealing effect. Reduce the risk of electrolyte leakage.
  • the end cover 11 is provided with a receiving groove 11c, and the blocking member 142 is received in the receiving groove 11c, and Welded on the end cover 11.
  • the blocking member 142 can be more firmly fixed to the end cap 11, so that the sealing effect can be more reliably improved and the plug 141 can be prevented from falling off.
  • the projection of the adapter member 13 and the projection of the hole plug 141 do not overlap, that is, the hole plug 141
  • the projection on the plane perpendicular to the axial direction of the liquid injection hole 11b does not overlap with the adapter member 13, which helps to reduce the occurrence of interference with the hole plug 141 when the adapter member 13 moves to the side away from the electrode assembly 2 under conditions such as shaking.
  • the risk of collision prevents the adaptor 13 from affecting the installation of the blocking member 142 and the reliability of the installation of the blocking member 142, and a tighter sealing effect is achieved.
  • the end cover 11 includes a body portion 111, a first boss 112, and a second boss 113, and the first boss 112 is formed by The main body 111 protrudes toward the electrode assembly 2 side, the second boss 113 protrudes from the first boss 112 toward the electrode assembly 2 side, and the injection hole 11 b penetrates the first boss 112 and the second boss 113.
  • the axial length of the injection hole 11b is By increasing, the contact area between the plug 141 and the injection hole 11b can be increased, the risk of falling off of the plug 141 can be reduced, and the plug 141 can be more reliably arranged in the injection hole 11b.
  • the insulating body 151 is provided with a matching groove 151b, and the matching groove 151b can be formed by stamping to accommodate the first boss 112 to realize the end cover 11 and A closer fit between the first insulators 15.
  • the battery 10 further includes a protective member 143, which is used to prevent the hole plug 141 from contacting the adapter member 13 and the like.
  • the guard 143 protrudes toward the electrode assembly 2 relative to the hole plug 141, that is, the end of the guard 143 close to the electrode assembly 2 is closer to the electrode assembly 2 than the end of the hole plug 141 close to the electrode assembly 2, or In other words, in the second direction H, the distance between the guard 143 and the electrode assembly 2 is smaller than the distance between the hole plug 141 and the electrode assembly 2.
  • the guard 143 can protect the plug 141 to a certain extent, preventing other structural parts in the housing 3, such as the adapter part 13, or the electrode assembly 2, from moving upwards during the shaking of the battery 10, etc.
  • the hole plug 141 is moved, the hole plug 141 is caused to fall off. That is, the guard 143 can reduce the risk of the hole plug 141 by preventing other structural components in the housing 3 from directly hitting the hole plug 141, and by preventing the hole plug 141 from falling off.
  • the plug 141 moves away from the electrode assembly 2 due to the impact, which can avoid affecting the installation of the blocking member 142 and the reliability of the installation of the blocking member 142, and achieve a tighter sealing effect.
  • the protective member 143 is disposed on the first insulating member 15 and protrudes from the first insulating member 15 to the side close to the electrode assembly 2. Specifically, referring to FIGS. 12 and 17, the protective member 143 is disposed on the insulating body 151 and protrudes from the insulating body 151 toward the electrode assembly 2 side. More specifically, the guard 143 is disposed on the boss formed by punching the aforementioned matching groove 151b. Wherein, the guard 143 may be configured as a boss. At this time, referring to FIGS.
  • the insulating body 151 is provided with a mating hole 151c, and the hole plug 141 passes through the mating hole 151c, and the side of the mating hole 151c close to the electrode assembly 2 Extend, but the bottom end of the hole plug 141 is still higher than the bottom end of the guard 143, so that when the electrode assembly 2 etc. move upward, the guard 143 can contact the adapter part 13 etc. before the hole plug 141.
  • the hole plug 141 is prevented from being impacted by the adapter member 13 and the like, which plays a protective role.
  • the mating hole 151c penetrates the boss formed by punching the aforementioned mating groove 151b, for example.
  • the number of the protective parts 13 is not specifically limited, and can be one, two or more.
  • the battery 10 includes two guards 143, which are arranged on both sides of the injection hole 11b opposite to each other, so as to protect the plug 141 more stably and reliably. .
  • the manufacturing method of the battery 10 provided by the embodiment of the present application includes the following steps:
  • the first adapter portion 131 is bent relative to the second adapter portion 132 between the first end surface 131e and the second end surface 131f of the first adapter portion 131.

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  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)
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Abstract

一种电池(10)、电池组(102)、用电设备(100)和电池(10)的制造方法，涉及电池领域。电池(10)包括：转接部件(13)，包括用于与电极组件(2)电连接的第一转接部(131)和用于与电极端子(12)电连接的第二转接部(132)，第一转接部(131)沿折痕(131c)相对于第二转接部(132)呈折叠状态；其中，折痕(131c)位于第一转接部(131)的第一端面(131e)和第二端面(131f)之间；转接部件(13)处于展开状态时，第二端面(131f)和第一端面(131e)沿长度方向(L)排列设置。

Description

电池、电池组、用电设备和电池的制造方法
相关申请的交叉引用
本申请是以申请号为202010274181.2，申请日为2020年4月9日的中国申请为基础，并主张其优先权，该中国申请的公开内容在此作为整体引入本申请中。
技术领域
本申请实施例涉及电池领域，特别涉及一种电池、电池组、用电设备和电池的制造方法。
背景技术
由于具有能量密度高、功率密度高、循环使用次数多、存储时间长等优点，圆柱锂离子电池等二次电池在电动车辆(如电动汽车、电动三轮车或电动自行车)等中被广泛应用。
在圆柱锂离子电池等二次电池中，电解液需要经由电芯端面进入电芯极片之间，实现浸润过程。
相关技术中，电池的浸润效率仍有待提高。
发明内容
本申请实施例旨在提供一种电池、电池组、用电设备和电池的制造方法，以提高电池的浸润效率。
本申请实施例所提供的电池，包括：
转接部件，包括用于与电极组件电连接的第一转接部和用于与电极端子电连接的第二转接部，第一转接部沿折痕相对于第二转接部呈折叠状态；
其中，折痕位于第一转接部的第一端面和第二端面之间；
转接部件处于展开状态时，第二端面和第一端面沿长度方向排列设置。
在一些实施例中，第一转接部的靠近第二转接部的一侧设有第一缺口，折痕延伸至第一缺口。
在一些实施例中，转接部件处于展开状态时，第一缺口沿长度方向或者与长度方向相交的方向延伸。
在一些实施例中，第二端面相对于第一端面远离第二转接部，沿着由第一端面至第二端面的方向，第一缺口向转接部件的宽度方向的中部倾斜。
在一些实施例中，第一缺口包括弧形缺口部，弧形缺口部的轮廓呈弧形。
在一些实施例中，第一转接部包括凸出部，凸出部沿转接部件的宽度方向凸出于第二转接部。
在一些实施例中，第一转接部包括连接部，连接部用于与电极组件连接，转接部件处于展开状态时，沿由第一转接部至第二转接部的方向，连接部凸出于折痕。
在一些实施例中，沿注液孔的轴向，转接部件的投影与注液孔的投影不重叠，注液孔用于注入电解液。
在一些实施例中，沿注液孔的轴向，转接部件的投影与孔塞的投影不重叠，孔塞伸入注液孔中并从注液孔的靠近电极组件的一侧穿出。
在一些实施例中，电池还包括防护件，防护件用于防止孔塞与转接部件接触。
在一些实施例中，电池还包括第一绝缘件，第一绝缘件位于电池的端盖的靠近电极组件的一侧，第一绝缘件包括绝缘本体和限位环，限位环相对于绝缘本体向靠近电极组件的方向凸出，并设置于转接部件的外围，以防止转接部件与电池的壳体接触。
在一些实施例中，限位环设置于电极组件的极耳的靠近端盖的一端的外围。
在一些实施例中，第一绝缘件还包括设置于绝缘本体上的支撑部，支撑部由绝缘本体向电极组件的方向凸出，并支撑于绝缘本体与第一转接部之间。
在一些实施例中，支撑部与限位环的内表面之间间隔布置，或者，支撑部与限位环的内表面接触。
在一些实施例中，绝缘本体上设有减重槽，减重槽由绝缘本体的远离电极组件的端面朝电极组件的方向凹陷。
在一些实施例中，电池包括端盖，端盖包括本体部、第一凸台和第二凸台，第一凸台由本体部朝电极组件一侧凸出，第二凸台由第一凸台朝电极组件一侧凸出，注液孔贯通第一凸台和第二凸台。
本申请实施例所提供的电池组，包括本申请实施例的电池。
本申请实施例所提供的用电设备，包括本申请实施例的电池组，电池组用于提供电能。
本申请实施例所提供的电池的制造方法，包括以下步骤：
将第一转接部相对于第二转接部在第一转接部的第一端面和第二端面之间发生 弯折。
通过以下参照附图对本申请的示例性实施例进行详细描述，本申请的其它特征及其优点将会变得清楚。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请实施例的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1示出本申请实施例一些实施例中用电装置的结构示意图。
图2示出图1中电池组的爆炸图。
图3示出图2中电池的立体图。
图4示出图3中电池的爆炸图。
图5示出图4中与第一极耳对应的顶盖组件的立体图。
图6示出图5所示顶盖组件在转接部件处于展开状态时的爆炸图。
图7示出图6中转接部件处于展开状态时的侧视图。
图8示出图7中转接部件第一转接部、第二转接部和第三转接部发生相对弯折时的示意图。
图9示出图7中转接部件处于折叠状态时的示意图。
图10示出图6中转接部件处于展开状态时的俯视图。
图11示出图10的I局部放大示意图。
图12示出图6中第一绝缘件的立体图。
图13示出图6中端盖的立体图。
图14示出图3中电池的仰视图。
图15示出图14在A-A处剖切时的局部示意图。
图16示出图15的II局部放大示意图。
图17示出图14在B-B处剖切时的局部示意图。
图18示出图14在C-C处剖切时的局部示意图。
图19示出本申请另一些实施例中与第一极耳对应的顶盖组件的立体图。
图20示出图19中顶盖组件的爆炸图。
图21示出图20中转接部件的仰视图。
图22示出图21所示转接部件处于展开状态时的俯视图。
图23示出图22的III局部放大图。
图24示出本申请又一些实施例中第一绝缘件的第一立体图。
图25示出图24所示第一绝缘件的第二立体图。
图26示出本申请实施例中电池的制造方法。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请的一部分实施例，而不是全部的实施例。以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本申请实施例及其应用或使用的任何限制。基于本申请的实施例，本领域普通技术人员在没有开展创造性劳动前提下所获得的所有其他实施例，都属于本申请实施例保护的范围。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为授权说明书的一部分。
在本申请实施例的描述中，需要理解的是，使用“第一”、“第二”等词语来限定零部件，仅仅是为了便于对相应零部件进行区别，如没有另行声明，上述词语并没有特殊含义，因此不能理解为对本申请实施例保护范围的限制。
此外，下面所描述的本申请不同实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。
电池一般包括壳体、电极组件、电极端子和转接部件等。电极组件设置在壳体内部，并通过转接部件与电极端子电连接。电极端子露出于壳体外部，用于与外部电路电连接。
电解液被注入壳体中，并进入电极组件的极片之间，与极片上的活性物质发生电化反应，产生充放电过程。
将电解液进入电极组件的过程，称为浸润过程，电解液进入电极组件的快慢，称为浸润效率。
在实践本申请实施例的过程中，发明人发现，在一些圆柱锂离子电池等电池中，转接部件被构造为可弯折的，而相关技术中，弯折后的转接部件对电极组件端面的遮挡较多，影响浸润效率。
基于上述发现，本申请实施例对电池的结构进行改进，以提高电池的浸润效率。
图1-26示例性地示出本申请实施例用电设备、电池组和电池的结构及电池的制造方法。
为了在接下来能够清楚地描述各方位，首先利用图2中的坐标系对各方向进行定义，坐标轴L表示第一方向，为转接部件13处于展开状态时，第一转接部131和第二转接部132的排列方向，同时，在一些实施例中，也是转接部件13处于展开状态时的长度方向；坐标轴H表示第二方向，垂直于第一方向L和第三方向W，为转接部件13处于折叠状态时，第一转接部131和第二转接部132的堆叠方向，同时，在一些实施例中，也是电池组102的高度方向，转接部件13的厚度方向，以及电池10的轴向；坐标轴W表示第三方向，垂直于第一方向L和第二方向H，同时，在一些实施例中，也是转接部件13的宽度方向。
然而，应当理解，前述方位定义仅是为了便于描述本申请实施例和简化描述，在未作相反说明的情况下，这些方位词并不指示和暗示所指的装置或元件必须具有特定的方位或者以特定的方位构造和操作，因此不能理解为对本申请实施例保护范围的限制。
参照图1，本申请实施例提供一种使用电池组102作为电源的用电设备100。其中，用电设备100包括设备本体101和电池组102。电池组102设置于设备本体101上，用于提供电能。
用电设备100例如为车辆、船舶、小型飞机等移动设备，其包括动力源，动力源包括电池组102，电池组102用于提供电能，为用电设备100提供驱动力。一些实施例中，用电设备100的驱动力全部为电能，此时动力源仅包括电池组102。另一些实施例中，用电设备100的驱动力包括电能和其他能源(例如机械能)，此时动力源包括电池组102和发动机等其他动力设备。参照图1，以车辆为例，一些实施例中，用电设备10为新能源车，该新能源车例如为纯电动汽车、混合动力汽车、增程式汽车、电动三轮车或两轮电动车等。
另外，用电设备100也可以为电池柜等储能设备，其包括电池组102，电池组102的数量为一个、两个或多个，从而使得该电池柜能够输出电能。
因此，只要包括电池组102的用电设备100均在本申请实施例的保护范围内。
其中，参照图2，电池组102包括箱体102a和电池10，电池10容纳于箱体102a中。
箱体102a包括套筒102b、第一箱盖102c和第二箱盖102d。套筒102b例如为铝壳，其内部中空，且其沿第二方向H彼此相对的两端均敞开。第一箱盖102c和第二箱盖102d分别盖合于套筒102b的沿第二方向H相对的两端，对套筒102b的沿第二方向H相对的两端进行封闭，使得箱体102a内部形成密闭空间，以收纳电池10等。这里的封闭指盖住或关闭，可以是密封，也可以是非密封。
在应用于两轮电动车等用电设备10上时，一般，第一箱盖102c在上，第二箱盖102d在下，即，第一箱盖102c为顶盖，第二箱盖102d为底盖。使用时，通过开合第一箱盖102c，来对电池10等位于箱体102a内部的结构部件进行维护或更换等。
箱体102a的形状可以多样，例如，参照图2，一些实施例中，箱体102a整体呈立方体形。其中，套筒102b呈中空且两端敞开的立方体形，其包括依次首尾相接的四块侧板，这四块侧板围合形成空腔，且相邻的两块侧板之间彼此垂直。套筒102b的高度方向沿着第二方向H。第一箱盖102c的形状与套筒102b顶端开口的形状相匹配。第二箱盖102d的形状则与套筒102b底端开口的形状相匹配。
电池10容置于箱体102a中，为电池组102的核心结构部件，用于提供电能。电池10的数量可以为一个、两个或多个。例如，参照图2，一些实施例中，箱体102a中设有多个电池10，以提供更多的电能。
参照图2-4，一些实施例中，电池10为圆柱电池，其轴向沿着第二方向H，且其包括壳体3、电极组件2和端盖组件1等。
壳体3内部设有空腔31，用于容置电极组件2等。在圆柱电池中，壳体3被构造为圆柱形。
电极组件2设置于壳体3的空腔31内，例如由第一极片、第二极片及位于第一极片和第二极片之间的绝缘隔片一同堆叠或卷绕形成。第一极片和第二极片中的一个为正极片，另一个为负极片，且二者均具有涂覆有活性物质的第一部分和由第一部分向外延伸的未涂覆活性物质的第二部分。具体地，参照图4，电极组件2包括电芯本体22和极耳21。其中，电芯本体22上涂覆有活性物质，与第一极片和第二极片的第一部分相应，用于产生电能。极耳21位于电芯本体22的端部，由电芯本体22向外侧延伸，且极耳21上未涂覆活性物质，与第一极片和第二极片的第二部分相应，用于将电芯本体22所产生的电能向外传递。
极耳21一般包括第一极耳21a和第二极耳21b，第一极耳21a和第二极耳21b中的一个用作正极耳，且另一个用作负极耳。参照图4，一些实施例中，第一极耳21a 和第二极耳21b分别位于电池本体22的沿第二方向H的相对两端。并且，参照图4，一些实施例中，在远离电芯本体22的方向上，第一极耳21a和第二极耳21b的横截面积均逐渐减小，向电极组件2的中心收窄。
端盖组件1设置于壳体3的端部，用于封闭空腔31，以保护电极组件2，并密封壳体3。在第一极耳21a和第二极耳21b分别位于电池本体22的沿第二方向H的相对两端时，电池10包括两个端盖组件1，这两个端盖组件1分别盖合于壳体31的沿第二方向H的相对两端，分别与第一极耳21a和第二极耳21b相对应，也可以分别称为第一端盖组件和第二端盖组件，以便于区分。
参照图3-6以及图19-20，一些实施例中，端盖组件1包括端盖11、电极端子12和转接部件13等。
端盖11封闭壳体3的端部开口。参照图4，一些实施例中，第一端盖组件和第二端盖组件的端盖11结构并不完全相同。例如，一些实施例中，第一端盖组件的端盖11上设有用于供电解液注入的注液孔11b，而第二端盖组件的端盖11上并未设置注液孔11b，而是设有防爆阀18。当然，另一些实施例中，也可以第二端盖组件的端盖11上设有注液孔11b，而第一端盖组件的端盖11上设有防爆阀18。
电极端子12设置于端盖11上，并通过转接部件13与电极组件2电连接，用于实现电极组件2与外部电路的电连接。其中，参照图6和图13，一些实施例中，端盖11上设有电极引出孔11a，电极端子12伸入电极引出孔11a中，实现与端盖11的连接。具体地，一些实施例中，端盖11上设有两个电极引出孔11a，这两个电极引出孔11a分别与两个电极端子12一一对应，即，两个电极端子12分别伸入两个电极引出孔11a中。并且，参照图6和图18，一些实施例中，每个电极引出孔11a中还设有密封圈19，以实现电极端子12与端盖11之间的密封。
转接部件13设置于端盖11的靠近电极组件2的一侧，用于电连接电极组件2与电极端子12。在电池10为圆柱电池等情况下，转接部件13被构造为可折叠的，换句话说，转接部件13具有展开状态和折叠状态，其中，未被组装成电池10成品时，转接部件13处于展开状态，而在组装成电池10成品后，转接部件13则处于折叠状态。
例如，参照图5-11以及图21-23，一些实施例中，转接部件13包括第一转接部131和第二转接部132。第一转接部131用于与电极组件2(具体为极耳21)电连接。第二转接部132用于与电极端子12电连接。在转接部件13处于展开状态时，第一转接部131和第二转接部132沿着第一方向L排列。并且，第一转接部131相对于第二 转接部132可弯折，二者弯折后形成折痕131c，即第一转接部131和第二转接部132在折痕131c处相对弯折。第一转接部131沿折痕131c相对于第二转接部132弯折后，第一转接部131和第二转接部132之间呈折叠状态。参照图15，处于折叠状态时，第一转接部131覆盖在电极组件2的端面上，而第二转接部132则叠置于第一转接部131的远离电极组件2的一侧。
参照图10和图22，一些实施例中，转接部件13被构造为转接片，其第一转接部131大致呈盘形，第二转接部132大致呈长条形。
继续参照图10和图22，一些实施例中，第一转接部131在第三方向W上凸出于第二转接部132，即第一转接部131的宽度大于第二转接部132的宽度。
具体地，继续参照图10和图23，第一转接部131包括凸出部131h，凸出部131h沿着第三方向W凸出于第二转接部132。更具体地，两个凸出部131h分别位于第二转接部132的沿第二方向W的两侧。其中，凸出部131h包括沿第一方向L相对的第一端面131e和第二端面131f，即第一端面131e和第二端面131f沿第一方向(即，长度方向)L排列。并且，第二端面131f相对于第一端面131e远离第二转接部132。
当然，在未图示的其他实施例中，第一转接部131也可以在第三方向W上不凸出于第二转接部132，即第一转接部131的宽度小于或等于第二转接部132的宽度。
相关技术中，折痕131c位于第一端面131e的远离第二端面131f的一侧，或者位于第一端面131e处。这种情况下，弯折后的转接部件13，其第一转接部131的位于第一端面131e和第二端面131f之间的部分全部覆盖于电极组件2的端面上，对电极组件2的遮挡较多，导致电解液由电极组件2端面进入电极组件2内部的速度较慢，影响电池10的浸润效率。
而与相关技术不同，在本申请实施例中，如图10和图22所示，转接部件13处于展开状态时，折痕131c位于第一端面131e和第二端面131f之间。这样，转接部件13处于折叠状态时，第一转接部131的位于第一端面131e和第二端面131f之间的部分不再全部对电极组件2的端面形成遮挡，而是第一端面131e与折痕131c之间的部分因被弯折，而不再对电极组件2的端面形成遮挡，因此，有利于加快电解液的浸润速度，提高电池10的浸润效率。
另外，使折痕131c位于第一端面131e和第二端面131f之间，还有利于缩短第二转接部132的沿第一方向L的尺寸(即长度)，减小电池10的电阻。
同时，折痕131c位于第一端面131e和第二端面131f之间，也方便实现转接部件 13对注液孔11b的避让，有利于提高注液效率。
相关技术中，折痕131c位于第一端面131e的远离第二端面131f的一侧，或者与第一端面131e大致平齐，导致弯折之后，转接部件13的一部分恰好位于注液孔11b的正下方，这就导致注液过程中，转接部件13会对经由注液孔11b注入的电解液形成阻挡，影响注液效率。
而本申请实施例通过使折痕131c位于第一端面131e和第二端面131f之间，则便于使转接部件13折叠后不再恰好位于注液孔11b正下方，从而减少转接部件13在注液过程中对电解液的阻挡，提高注液效率。
例如，参照图5，一些实施例中，第一转接部131沿折痕131c相对于第二转接部132弯折后，沿注液孔11b的轴向，转接部件13的投影与注液孔11b的投影不重叠，换句话说，弯折之后(即转接部件13处于折叠状态时)，注液孔11b在与第二方向H垂直的表面上的投影与转接部件13不重叠。这样，在注液孔11b的径向上，转接部件13能够避让注液孔11b，减少注液过程中对电解液的阻挡，方便电解液经由注液孔11b更顺畅地注入壳体3中，从而提高注液效率。
而作为使折痕131c位于第一端面131e和第二端面131f之间的一种实施方式，参照图5、图6、图10和图19-23，一些实施例中，第一转接部131上设有至少一个第一缺口131d，这至少一个第一缺口131d位于折痕131c的沿第三方向W的至少一侧。其中，第一缺口131d设置于第一转接部131的靠近第二转接部132的一侧。折痕131c延伸至第一缺口131d。这样，在第一缺口131d的作用下，第一转接部131和第二转接部132能够更方便准确地在位于第一端面131e和第二端面131f之间的折痕131c处发生相对弯折。
具体地，参照图10和图22，一些实施例中，第一转接部131的靠近第二转接部132的一侧设有两个第一缺口131d，这两个第一缺口131d分别位于折痕131c的沿第三方向W的两侧，即折痕131c的沿第三方向W的两端分别设有一个第一缺口131d。并且，折痕131c的两端(具体为沿第三方向W的两端)分别延伸至两个第一缺口131d。其中，两个第一缺口131d可以对称地设置于折痕131c的沿第三方向W的两侧。基于此，相对弯折过程中，第一转接部131和第二转接部132之间更加不容易发生偏斜。
其中，参照图10-11，一些实施例中，在转接部件13处于展开状态时，第一缺口131d沿着第一方向L延伸，或者，参照图22-23，另一些实施例中，在转接部件13处于展开状态时，第一缺口131d沿着与第一方向L相交的方向延伸。
并且，继续参照图22-23，在第一缺口131d沿着与第一方向L相交的方向延伸的情况下，一些实施例中，沿着由第一端面131e至第二端面131f的方向，第一缺口131d向转接部件13的第三方向W的中部倾斜。这样，折痕131c处的宽度较小，更方便第一转接部131和第二转接部132在折痕131c处发生相对弯折。
第一缺口131d的具体形状可以多样。
例如，参照图11，一些实施例中，第一缺口131d的轮廓线均为直线，且第一缺口131d的各段宽度基本一致。
再例如，参照图22-23，另一些实施例中，第一缺口131d包括弧形缺口部131i，弧形缺口部131i的轮廓呈弧形。其中，弧形缺口部131i例如位于第一缺口131d的靠近第二端面131f的一端，也即第一缺口131d的靠近第二端面131f的部分被构造为弧形缺口部131i。这样，不仅方便第一缺口131d的加工，还有利于减小应力集中，改善转接部件13的受力状态，增强转接部件13的承载能力。具体地，继续参照图22-23，一些实施例中，第一缺口131d还包括第一缺口段131j，第一缺口段131j和弧形缺口部131i沿着由第一端面131e至第二端面131f的方向依次连通，且第一缺口段131j被构造为非弧形缺口部。此时弧形缺口部131i也可称为第二缺口段。其中，沿着由第一端面131e至第二端面131f的方向，第一缺口段131j的沿第三方向W的尺寸(即宽度)逐渐变小。第一缺口段131j和弧形缺口部131i的连接处可以设有圆角，以进一步改善应力集中现象。
另外，参照图5-11以及图19-23，一些实施例中，转接部件13还包括第三转接部133，第二转接部132通过该第三转接部133与电极端子12电连接。并且，第二转接部132相对于第三转接部133可弯折，此时，第二转接部132相对于第一转接部131和第三转接部133均可弯折。这样，在转接部件13处于展开状态时，第三转接部133连接于第二转接部132的远离第一转接部131的一端，换句话说，第一转接部131、第二转接部132和第三转接部133沿着第一方向L排列，并依次连接；而在转接部件13处于折叠状态时，第一转接部131覆盖在电极组件2的端面上，而第二转接部132则叠置于第一转接部131的远离电极组件2的一侧，且第三转接部133叠置于第二转接部132的远离电极组件2的一侧，即第二转接部132和第三转接部133沿着远离电极组件2的方向依次叠置于第一转接部131的远离电极组件2的一侧。
其中，参照图5-11以及图19-23，一些实施例中，第一转接部131上设有通孔131b和连接部13d。
通孔131b沿着第二方向H贯穿第一转接部131，一方面方便定位，另一方面方便电解液流过。在组装过程中，可以基于通孔131b来确定转接部件13与电极组件2在第一方向L和第三方向W上的相对位置关系，例如，通孔131b可以与电极组件2的卷绕中心对齐。同时，在电解液注入过程中，电解液可以经由通孔131b流向电极组件2，提高浸润效率及注液效率。
连接部13d用于与电极组件2连接，即，第一转接部131通过连接部13d与电极组件2连接。连接部13d与电极组件2之间可以采用焊接或铆接等方式连接。
一些实施例中，连接部13d为第一转接部131的向电极组件2一侧凸出的凸台，以进一步方便连接部13d与极耳21的焊接。此时，连接部13d可以冲压形成，冲压之后，第一连接部131的远离电极组件2的表面形成凹槽131a，连接部13d与凹槽131a在转接部件13的厚度方向上对应设置。一些实施例中，凹槽131a呈V字形。
继续参照图5-11以及图19-23，一些实施例中，连接部13d的至少部分位于凸出部131h上，即在第三方向W上，连接部13d也凸出于折痕131c。
另外，参照图10和图22，一些实施例中，所述转接部件13处于展开状态时，沿由第一转接部131至第二转接部132的方向，也即沿由第二端面131f至第一端面131e的方向，凹槽131a凸出于折痕131c，由于连接部131d与凹槽131a相应，因此，连接部13d也凸出于折痕131c，换句话说，在第一方向L上，连接部13d延伸至折痕131c的靠近第一端面131e的一侧。这样，既能使折痕131c位于第一端面131e和第二端面131f之间，提高浸润效率，也有利于使连接部13d与极耳21之间具有较大的连接面积，增强连接部13d与极耳21之间的连接可靠性，提高电池10的过流能力。
具体地，参照图5和图21，一些实施例中，第一转接部131上设有两个连接部13d，这两个连接部13d对称地设置于第一转接部131上。例如，一些实施例中，两个连接部13d设置于第一转接部131上，并关于通孔131b对称布置。
此外，参照图10和图22，一些实施例中，第一转接部131的两个凸出部131h的第二端面131f之间设有第三缺口13e，该第三缺口13e沿着由第二端面131f向第一端面131e的方向凹陷。该设置的好处在于，一方面，对于第一端盖组件而言，有利于减少第一转接部131对电极组件2端面的遮挡，提高浸润效率，另一方面，对于第二端盖组件而言，该第三缺口13e位于防爆阀18的靠近电极组件2的一侧，方便高压气体作用于防爆阀18，使防爆阀18更可靠地在预定压力下开启。
参照图6、图10、图18和图22，一些实施例中，第三转接部133上设有第一连 接孔133a，第一连接孔133a与电极端子12一一对应，电极端子12穿过第一连接孔133a，实现第三转接部133与电极端子12的连接。一些实施例中，第三转接部133也被构造为盘形，具有大于第二转接部132的宽度。
而为了方便第三转接部133与第二转接部132相对弯折，参照图10和图22，一些实施例中，第三转接部133和第二转接部132的连接处设有第二缺口132a。第二缺口132a由第二转接部132的沿第三方向W的边缘向第二转接部132的沿第三方向W的中部延伸，即第二缺口132a由第二转接部132的沿第三方向W的边缘向第二转接部132的沿第三方向W的中部凹陷。并且，参照图10和图22，一些实施例中，第二转接部132的沿第三方向W的两侧分别设有一个第二缺口132a，即，两个第二缺口132a设置于第二转接部132的沿第三方向W的两侧。这样，第三转接部133与第二转接部132能够在第二缺口132a处更方便地发生相对弯折。
另外，参照图6和图20，一些实施例中，端盖组件1还包括第一绝缘件15、第二绝缘件16、连接块17和孔塞141等。
其中，第一绝缘件15和第二绝缘件16分别位于端盖11的靠近和远离电极组件2的一侧，起到绝缘作用，以降低短路风险。
第一绝缘件15和第二绝缘件16可以由塑胶等绝缘材料制成。
参照图12，一些实施例中，第一绝缘件15包括绝缘本体151和设置在绝缘本体151上的限位环152和支撑部153。
与圆柱电池的整体形状相适应，绝缘本体151大致呈圆形。并且，参照图6、图12和图18，绝缘本体151上设有第二连接孔151a，电极端子12穿过第二连接孔151a。第二连接孔151a与电极端子12一一对应。
限位环152用于限制转接部件13等的横向位移(即在垂直于第二方向H的平面内的位移)，以降低短路风险。参照图5、图12、图16和图19，限位环152相对于绝缘本体151向靠近电极组件2的方向凸出，并设置于转接部件13的外围，以防止转接部件13与壳体3接触，以免在电池10晃动、转接部件13折偏等情况下，转接部件13与壳体3发生接触，引发短路问题。
具体地，参照图5、图15-16和图19，限位环152的内径大于处于折叠状态的转接部件13的沿第一方向L和第三方向W的最大尺寸，且限位环152由绝缘本体151向电极组件2一侧延伸至第一转接部131的靠近电极组件2的一侧，使限位环152围设于第一转接部131的外围。这样，处于折叠状态的转接部件13，其整体均位于限位 环152所限定的范围内，使得限位环152能够对转接部件13的横向位移起到一定的限制作用，防止转接部件13因横向位移过大，而与壳体3发生接触。
更具体地，参照图16，一些实施例中，限位环152不仅延伸至第一转接部131靠近电极组件2的一侧，还进一步延伸至极耳21的靠近端盖11的一端，此时，限位环152不仅围设于转接部件13的外围，还围设于极耳21的靠近端盖11的一端的外围，从而限位环152能在限制转接部件13横向位移的同时，对电极组件2的横向位移也起到一定的限制作用，防止电极组件2因横向位移过大，而与壳体3发生接触，造成短路问题，并防止极耳21a向壳体3发生弯折而造成短路的问题。
其中，参照图12，一些实施例中，限位环152被构造为一段连续的圆环，但同时，限位环152为非封闭的圆环，限位环152的两自由端之间设有伸出口152a，供处于展开状态的转接部件13的第二转接部132伸出。基于此，限位环152既能可靠地限制转接部件13等的横向位移，降低短路风险，同时还能方便转接部件13先以展开状态组装至端盖组件1中，之后再进行折叠。
支撑部153用于限制电极组件2等的纵向位移(即沿第二方向H的位移)，防止电极组件2纵向位移过大，影响电池10的性能及使用安全性。参照图12和图18，支撑部153相对于绝缘本体151向靠近电极组件2的方向凸出，并支撑于绝缘本体151与第一转接部131之间。这样，支撑部153通过与第一转接部131抵接，而限制电极组件2的纵向位移，有利于减少电极组件2的晃动，使电池10能够更加安全可靠地工作。
具体地，参照图12，一些实施例中，支撑部153被构造为弧形段，此时，支撑部153与第一转接部131的接触面积较大，从而能够更可靠地限制电极组件2的纵向位移。
另外，参照图12及图15，一些实施例中，绝缘本体151上设有两个支撑部153，这两个支撑部153相对地布置于第二转接部132的两侧，以更平稳地对第一转接部131进行抵接限位。例如，参照图12，一些实施例中，支撑部153位于限位环152与第二连接孔151a之间，且两个支撑部153关于绝缘本体151的中心对称布置。此时，两个支撑部153均位于限位环152的内侧，并彼此相对，能更平稳地支撑于绝缘本体151与第一转接部131之间，对第一转接部131进行更平稳可靠地抵接限位。
其中，参照图12，一些实施例中，支撑部153与限位环152的内表面间隔布置。而为了进一步增加支撑部153与第一转接部131之间的接触面积，参照图24，另一些 实施例中，支撑部153与限位环152的内表面接触。比较图12和图24可知，在支撑部153与绝缘本体151中心之间的径向距离不变的前提下，当支撑部153由与限位环152的内表面间隔布置，改变为与限位环152的内表面接触时，支撑部153的径向宽度增大，这样，支撑部153的用于与第一转接部131接触的表面面积增大，因此，能够更可靠地对第一转接部131进行抵接限位。
另外，参照图25，一些实施例中，绝缘本体151上设有减重槽154，减重槽154由绝缘本体51的远离电极组件2的端面朝电极组件2的方向凹陷。所设置的减重槽154，一方面可以减轻第一绝缘件15的重量，进而减轻电池10的重量，另一方面，在第一绝缘件15采用注塑方式加工成型时，还可以防止第一绝缘件15注塑时产生缩痕。
其中，参照图25，一些实施例中，减重槽154包括至少两段槽段154a，这至少两段槽段154a沿着绝缘本体151的周向布置。
继续参照图25，一些实施例中，绝缘本体151上设有两个减重槽154，这两个减重槽154位于绝缘本体151的中心的两侧，并彼此相对，也即，这两个减重槽154关于绝缘本体151的中心对称布置。这样，可以更充分地减重，并更有效地防止注塑缩痕。
结合图24和图25可知，一些实施例中，绝缘本体151上同时设有减重槽154和支撑部153。此时，减重槽154与支撑部153一一对应地设置。其中，减重槽154与支撑部153分别设置于绝缘本体151的两个轴向端面上，二者的周向及径向位置相同，且二者的周向和径向尺寸一致。这样，即使在支撑部153厚度较大时，减重槽154也能有效减重和防止缩痕。
第二绝缘件16和连接块17设置于端盖11上，并沿着远离电极组件2的方向依次布置，即，第二绝缘件16位于连接块17与端盖11之间，用于实现端盖11与连接块17之间的绝缘。参照图6，第二绝缘件16和连接块17上分别设有第三连接孔161和第四连接孔171。第三连接孔161和第四连接孔171均与电极端子12一一对应地设置。电极端子12从电极引出孔11a中伸出，并依次穿过第三连接孔161和第四连接孔171，实现与第二绝缘件16和连接块17的连接。
孔塞141用于密封注液孔11b。如图16所示，孔塞141伸入注液孔11b中，并从注液孔11b的靠近电极组件2的一侧穿出。注液完成后，孔塞141被塞入注液孔11b中，以防止注入的电解液从注液孔11b处流出，发生泄露。
同时，参照图6以及图15-17，一些实施例中，端盖组件1还包括封堵件142，封 堵件142设置于端盖11上，并封堵注液孔11b的远离电极组件2的轴向端面。例如，封堵件142设置于孔塞141的远离电极组件2的一端，并与端盖11连接。基于此，封堵件142可以提高对注液孔11b的密封效果，同时也可以降低孔塞141的脱落风险。封堵件142在起到密封作用的同时，还通过限制孔塞141朝远离电极组件2的一侧的位移，来防止孔塞141从注液孔11b中脱出，这有利于进一步改善密封效果，降低电解液泄露风险。
其中，为了实现封堵件142与端盖11的连接，参照图6，一些实施例中，端盖11上设有容置槽11c，封堵件142容置于该容置槽11c中，并焊接于端盖11上。这样，封堵件142能够更稳固地固定于端盖11上，从而能够更可靠地提高密封效果和防止孔塞141脱落。
继续参照图5和图16，一些实施例中，转接部件13处于折叠状态时，沿注液孔11b的轴向，转接部件13的投影与孔塞141的投影不重叠，即孔塞141在与注液孔11b轴向垂直的平面上的投影与转接部件13不重叠，这有利于降低转接部件13在晃动等情况下向远离电极组件2一侧移动时，与孔塞141发生碰撞的风险，避免转接部件13影响封堵件142的安装和封堵件142安装的可靠性，实现更加严密的密封效果。
其中，为了提高孔塞141的设置可靠性，参照图13和图16，一些实施例中，端盖11包括本体部111、第一凸台112和第二凸台113，第一凸台112由本体部111朝电极组件2一侧凸出，第二凸台113由第一凸台112朝电极组件2一侧凸出，注液孔11b贯通第一凸台112和第二凸台113。通过在本体部111和第一凸台112的基础上，增设第二凸台113，并使注液孔11b贯通第一凸台112和第二凸台113，使得注液孔11b的轴向长度增加，从而能够增大孔塞141与注液孔11b的接触面积，降低孔塞141的脱落风险，实现孔塞141在注液孔11b中更可靠地设置。这种情况下，参照图6和图16，一些实施例中，绝缘本体151上设有配合槽151b，配合槽151b可以冲压形成，用于容置第一凸台112，以实现端盖11与第一绝缘件15之间更紧密的配合。
此外，参照图17，一些实施例中，电池10还包括防护件143，防护件143用于防止孔塞141与转接部件13等接触。其中，防护件143相对于孔塞141朝靠近电极组件2的方向凸出，即，防护件143的靠近电极组件2的一端比孔塞141的靠近电极组件2的一端更靠近电极组件2，或者，换句话说，在第二方向H上，防护件143与电极组件2之间的距离小于孔塞141与电极组件2之间的距离。这样，防护件143能够对孔塞141起到一定的防护作用，防止在电池10晃动等过程中，壳体3内的其他结构部件， 例如转接部件13，或者电极组件2等，因向上窜动，而碰撞孔塞141，导致孔塞141脱落，也即，防护件143能够通过防止壳体3内其他结构部件直接冲撞孔塞141，而降低孔塞141的脱落风险，并且，通过防止孔塞141因受冲击而向远离电极组件2的方向移动，能避免影响封堵件142的安装和封堵件142安装的可靠性，实现更加严密的密封效果。
一些实施例中，防护件143设置在第一绝缘件15上，由第一绝缘件15向靠近电极组件2的一侧凸出。具体地，参照图12和图17，防护件143设置于绝缘本体151上，并由绝缘本体151向电极组件2一侧凸出。更具体地，防护件143设置于冲压前述配合槽151b所形成的凸台上。其中，防护件143可以被构造为凸柱。此时，参照图5、图6和图16，一些实施例中，绝缘本体151上设有配合孔151c，孔塞141穿过配合孔151c，并由配合孔151c的靠近电极组件2的一侧伸出，但孔塞141的底端仍然高于防护件143的底端，以使在电极组件2等向上窜动时，防护件143能先于孔塞141与转接部件13等接触，从而防止孔塞141受到转接部件13等的冲击，起到防护作用。其中，配合孔151c例如贯通冲压前述配合槽151b所形成的凸台。
另外，防护件13的数量不做具体限制，可以为一个、两个或多个。例如，参照图12和图17，一些实施例中，电池10包括两个防护件143，这两个防护件143相对地布置于注液孔11b的两侧，以更平稳可靠地防护孔塞141。
参照图26，本申请实施例所提供的电池10的制造方法，包括以下步骤：
S110、将第一转接部131相对于第二转接部132在第一转接部131的第一端面131e和第二端面131f之间发生弯折。
以上所述仅为本申请的示例性实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，参数均应包含在本申请的保护范围之内。

Claims (19)

  1. 一种电池(10)，包括：
    转接部件(13)，包括用于与电极组件(2)电连接的第一转接部(131)和用于与电极端子(12)电连接的第二转接部(132)，所述第一转接部(131)沿折痕(131c)相对于所述第二转接部(132)呈折叠状态；
    其中，所述折痕(131c)位于所述第一转接部(131)的第一端面(131e)和第二端面(131f)之间；
    所述转接部件(13)处于展开状态时，所述第二端面(131f)和所述第一端面(131e)沿长度方向(L)排列设置。
  2. 根据权利要求1所述的电池(10)，其中，所述第一转接部(131)的靠近所述第二转接部(132)的一侧设有第一缺口(131d)，所述折痕(131c)延伸至所述第一缺口(131d)。
  3. 根据权利要求2所述的电池(10)，其中，所述转接部件(13)处于展开状态时，所述第一缺口(131d)沿所述长度方向(L)或者与所述长度方向(L)相交的方向延伸。
  4. 根据权利要求3所述的电池(10)，其中，所述第二端面(131f)相对于第一端面(131e)远离所述第二转接部(132)，沿着由所述第一端面(131e)至所述第二端面(131f)的方向，所述第一缺口(131d)向所述转接部件(13)的宽度方向(W)的中部倾斜。
  5. 根据权利要求2-4任一项所述的电池(10)，其中，所述第一缺口(131d)包括弧形缺口部(131i)，所述弧形缺口部(131i)的轮廓呈弧形。
  6. 根据权利要求1-5任一所述的电池(10)，其中，所述第一转接部(131)包括凸出部(131h)，所述凸出部(131h)沿所述转接部件(13)的宽度方向(W)凸出于所述第二转接部(132)。
  7. 根据权利要求1-6任一所述的电池(10)，其中，所述第一转接部(131)包括连接部(13d)，所述连接部(13d)用于与所述电极组件(2)连接，所述转接部件(13)处于展开状态时，沿由所述第一转接部(131)至所述第二转接部(132)的方向，所述连接部(13d)凸出于所述折痕(131c)。
  8. 根据权利要求1-7任一所述的电池(10)，其中，沿注液孔(11b)的轴向，所 述转接部件(13)的投影与注液孔(11b)的投影不重叠，所述注液孔(11b)用于注入电解液。
  9. 根据权利要求8所述的电池(10)，其中，沿所述注液孔(11b)的轴向，所述转接部件(13)的投影与孔塞(141)的投影不重叠，所述孔塞(141)伸入所述注液孔(11b)中并从所述注液孔(11b)的靠近所述电极组件(2)的一侧穿出。
  10. 根据权利要求9所述的电池(10)，还包括防护件(143)，所述防护件(143)用于防止所述孔塞(141)与转接部件(13)接触。
  11. 根据权利要求1-10任一所述的电池(10)，还包括第一绝缘件(15)，所述第一绝缘件(15)位于所述电池(10)的端盖(11)的靠近所述电极组件(2)的一侧，所述第一绝缘件(15)包括绝缘本体(151)和限位环(152)，限位环(152)相对于所述绝缘本体(151)向靠近所述电极组件(2)的方向凸出，并设置于所述转接部件(13)的外围，以防止所述转接部件(13)与所述电池(10)的壳体(3)接触。
  12. 根据权利要求11所述的电池(10)，其中，所述限位环(152)设置于所述电极组件(2)的极耳(21)的靠近所述端盖(11)的一端的外围。
  13. 根据权利要求11或12所述的电池(10)，其中，所述第一绝缘件(15)还包括设置于所述绝缘本体(151)上的支撑部(153)，所述支撑部(153)由所述绝缘本体(151)向所述电极组件(2)的方向凸出，并支撑于所述绝缘本体(151)与所述第一转接部(131)之间。
  14. 根据权利要求13所述的电池(10)，其中，所述支撑部(153)与所述限位环(152)的内表面之间间隔布置，或者，所述支撑部(153)与所述限位环(152)的内表面接触。
  15. 根据权利要求11-14任一所述的电池(10)，其中，所述绝缘本体(51)上设有减重槽(154)，所述减重槽(154)由所述绝缘本体(51)的远离所述电极组件(2)的端面朝所述电极组件(2)的方向凹陷。
  16. 根据权利要求8-15任一所述的电池(10)，包括端盖(11)，所述端盖(11)包括本体部(111)、第一凸台(112)和第二凸台(113)，所述第一凸台(112)由所述本体部(111)朝所述电极组件(2)一侧凸出，所述第二凸台(113)由所述第一凸台(112)朝所述电极组件(2)一侧凸出，所述注液孔(11b)贯通所述第一凸台(112)和所述第二凸台(113)。
  17. 一种电池组(102)，包括如权利要求1-16任一所述的电池(10)。
  18. 一种用电设备(100)，包括如权利要求17所述的电池组(102)，所述电池组(102)用于提供电能。
  19. 一种电池(10)的制造方法，包括：
    将第一转接部(131)相对于第二转接部(132)在所述第一转接部(131)的第一端面(131e)和第二端面(131f)之间发生弯折。
PCT/CN2020/108155 2020-04-09 2020-08-10 电池、电池组、用电设备和电池的制造方法 WO2021203599A1 (zh)

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