WO2023087285A1 - 电池单体、电池、用电设备及电池单体的制造方法和设备 - Google Patents

电池单体、电池、用电设备及电池单体的制造方法和设备 Download PDF

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Publication number
WO2023087285A1
WO2023087285A1 PCT/CN2021/131936 CN2021131936W WO2023087285A1 WO 2023087285 A1 WO2023087285 A1 WO 2023087285A1 CN 2021131936 W CN2021131936 W CN 2021131936W WO 2023087285 A1 WO2023087285 A1 WO 2023087285A1
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WO
WIPO (PCT)
Prior art keywords
current collecting
collecting member
end cap
tab
battery cell
Prior art date
Application number
PCT/CN2021/131936
Other languages
English (en)
French (fr)
Inventor
吴怡祯
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 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 KR1020237027395A priority Critical patent/KR20230130718A/ko
Priority to CN202180094864.2A priority patent/CN116897465A/zh
Priority to EP21964439.0A priority patent/EP4287386A4/en
Priority to PCT/CN2021/131936 priority patent/WO2023087285A1/zh
Priority to JP2023543217A priority patent/JP2024503489A/ja
Publication of WO2023087285A1 publication Critical patent/WO2023087285A1/zh
Priority to US18/234,383 priority patent/US20230395949A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • 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
    • 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
    • H01M50/20—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • 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
    • H01M50/547—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
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • 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
    • 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
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, in particular, to a battery cell, a battery, an electrical device, and a method and device for manufacturing the battery cell.
  • batteries are used more and more widely, such as mobile phones, laptop computers, battery cars, electric vehicles, electric aircraft, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.
  • Embodiments of the present application provide a battery cell, a battery, an electrical device, and a manufacturing method and device for the battery cell, which are beneficial to improving the energy density of the battery cell.
  • the embodiment of the present application provides a battery cell, including: a battery cell, including a main body and a tab, the tab protrudes from one end of the main body in the first direction; a casing, with an opening, the casing is used to accommodate the electric core; an end cover assembly is used to cover the opening; a current collecting member, in a first direction, the current collecting member is located at the main body facing the On one side of the end cover assembly, the current collecting member is used to connect the tab and the end cover assembly; wherein, the tab includes a first connection portion used to connect with the current collecting member, in the In the first direction, the first connecting portion is configured to be located on a side of the current collecting member facing the end cap assembly.
  • the first connecting part where the tab is connected to the current-collecting member is located on the side of the current-collecting member facing the end cap assembly, which makes full use of the space between the current-collecting member and the end cap assembly, reducing the occupation of the tab.
  • the space inside the casing can free up more space for the main body of the electrode assembly, which is beneficial to improving the energy density of the battery cell.
  • the current collecting member is provided with a folded portion, and the folded portion is foldably disposed on a side of the current collecting member facing the end cap assembly in the first direction, The folded portion is used to connect the first connecting portion.
  • the current collecting member is provided with a folded portion that can be folded, and the first connecting portion and the folded portion can be connected together before the folded portion is folded, so that the first connecting portion and the folded portion can be realized more conveniently. Electrical connection of the current collecting member. After the first connection part is connected to the folded part, the folded part can be folded relative to the current collecting member, and the first connecting part is naturally arranged on the side of the current collecting member facing the end cap assembly, improving the contact with the tab. Shaping effect.
  • the first connecting portion in the first direction, is stacked with the folded portion, and the first connecting portion is located on a side of the folded portion facing the end cover assembly. side.
  • the first connecting part and the folded part are stacked in the first direction, and the first connecting part is located on the side of the folded part facing the end cover assembly.
  • This structure ensures that the first connecting part and the folded There is a large flow area between the two parts.
  • the first connecting part and the turning part are compact as a whole, reducing the overall thickness of the first connecting part and the turning part, and reducing the pressure caused by the first connecting part and the turning part. If the whole part is too thick, the distance between the current collecting member and the end cap assembly will increase, resulting in the risk of reducing the space inside the housing for accommodating the main part.
  • the folded portion is foldably connected to an edge position of the current collecting member.
  • the folded portion is foldably connected to the edge of the current collecting member, and the folded portion protects the tab and reduces the risk of cutting the tab by the edge of the current collecting member.
  • the opposite ends of the current collecting member are connected with the folded parts in the second direction, the second direction is perpendicular to the first direction;
  • the two tabs of the main body are disposed at intervals, and the first connecting portions of the two tabs are respectively connected to the two folded portions.
  • the first connecting parts of the two tabs of the battery cell are respectively connected to the two turning parts on the current collecting member, which can improve the stability of the current collecting member in the housing and reduce the shaking of the current collecting member in the housing risks of.
  • the folded portion and the current collecting member are integrally formed.
  • the folded part and the current collecting member are integrally formed, and the forming method of the folded part and the current collecting member is simple to ensure the firmness between the two.
  • the tab is bent around the current collecting member; the tab further includes a second connecting portion, and the second connecting portion is used to connect the main body portion with the first connection part, and in the first direction, the second connecting part is located on a side of the current collecting member facing the main part.
  • the tab is bent around the current-collecting member, so that the current-collecting member plays a good role in limiting the tab and reduces the risk of the tab being inserted into the main body.
  • the end cover assembly includes: an end cover for covering the opening; an electrode terminal provided on the end cover for electrically connecting with the current collecting member; an insulator provided for On the side of the end cover facing the main body in the first direction, the insulator is used to separate the end cover from the battery core; the current collecting member includes a The first current collecting part connected by a connecting part, in the first direction, a receiving gap is formed between the first collecting part and the insulator, and the receiving gap is used to accommodate the first connecting part department.
  • a receiving gap is formed between the first current collecting part of the current collecting member and the insulator, and the first connecting part is accommodated in the receiving gap, thereby effectively utilizing the space between the first current collecting part and the insulator,
  • the space inside the housing occupied by the tab is reduced, more space can be vacated for the main body of the electrode assembly, and it is beneficial to improve the energy density of the battery cell.
  • the insulator has an inner surface facing the main body, the insulator is provided with a first recess recessed from the inner surface in a direction away from the main body, the first recess It is used for accommodating at least a part of the first collecting part; in the first direction, the receiving gap is formed between the first collecting part and the bottom surface of the first concave part.
  • the insulator is provided with a first concave portion, and at least a part of the first current collecting portion is accommodated in the first concave portion, which reduces the space occupied by the first current collecting portion inside the housing and frees up more space for the main body.
  • the space is conducive to improving the energy density of the battery cell.
  • the insulator has an outer surface facing away from the main body, and a first convex portion protrudes from a position corresponding to the first concave portion on the outer surface, and the first concave portion extends from the first concave portion.
  • the inner surface is recessed into the first protrusion along the direction away from the main body; the end cap is provided with a second recess, and the second recess is used to accommodate at least a part of the first protrusion.
  • the first convex part is arranged in the second concave part, which can make the structure of both the insulating part and the end cover more compact, and reduce the space occupied by the insulating part inside the casing.
  • the first concave portion is recessed into the first convex portion from the inner surface along the direction away from the main body portion, which increases the recessed depth of the first concave portion, so that the first collecting portion can be accommodated to a deeper position of the first concave portion to make room for the main body portion more space.
  • the current collecting member further includes a second current collecting part, the second current collecting part is connected to the first current collecting part, and the second current collecting part is used to connect with the electrode terminal. electrical connection; in the first direction, the first current collecting portion and the second current collecting portion are dislocated so that the current collecting member faces one side of the main body portion at the first current collecting portion The side forms an accommodating space for accommodating a part of the tab.
  • the first current collecting part and the second current collecting part are misaligned in the first direction, so that the current collecting member forms an accommodation space for accommodating the tab on the side of the first current collecting part facing the main body, so that the pole The ears can be moved up as a whole to free up more space for the main body, which is conducive to improving the energy density of the battery cell.
  • an embodiment of the present application provides a battery, including: the battery cell provided in any one embodiment of the first aspect; and a box for accommodating the battery cell.
  • the embodiments of the present application provide an electric device, including the battery provided in any one embodiment of the second aspect.
  • an embodiment of the present application provides a method for manufacturing a battery cell.
  • the manufacturing method includes: providing an electric core, the electric core includes a main body and tabs, and the tabs protrude from the main body At one end in the first direction, the lug includes a first connection portion; providing a housing with an opening; providing an end cover assembly; providing a current collecting member; connecting the current collecting member to the first a connecting portion and the end cap assembly; accommodate the cell in the casing; cover the end cap assembly on the opening; wherein, in the first direction, the current collecting member is located at the The side of the main body facing the end cap assembly, the first connecting portion is located on the side of the current collecting member facing the end cap assembly.
  • the current collecting member is provided with a folded portion; the connecting the current collecting member to the tab and the end cap assembly includes: connecting the first connecting portion to the Folding part; Folding the folding part relative to the current collecting member, so that the tab is bent around the current collecting member; Connecting the end cap assembly to the current collecting member, so that all The first connecting portion is located on a side of the current collecting member facing the end cap assembly.
  • the embodiment of the present application also provides a battery cell manufacturing equipment, the manufacturing equipment includes: a first providing device for providing a battery cell, the battery cell includes a main body and a tab, and the pole The ear protrudes from one end of the main body in the first direction, and the ear includes a first connecting portion; the second providing device is used to provide a housing, and the housing has an opening; the third providing device uses for providing the end cap assembly; the fourth providing device is used for providing the current collecting member; the assembly device is used for connecting the current collecting member to the first connection part and the end cap assembly; and is also used for the The electric core is accommodated in the housing; it is also used to cover the end cover assembly on the opening; wherein, in the first direction, the current collecting member is located on the side of the main body facing the end cover assembly On one side, the first connecting portion is located on a side of the current collecting member facing the end cover assembly.
  • Fig. 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • Fig. 2 is a schematic structural diagram of a battery provided by some embodiments of the present application.
  • Fig. 3 is an exploded view of a battery cell provided by some embodiments of the present application.
  • Fig. 4 is a cross-sectional view of the battery cell shown in Fig. 3;
  • Fig. 5 is a partial cross-sectional view of the battery cell shown in Fig. 3;
  • Figure 6 is an axonometric view of the current collector shown in Figure 5;
  • Fig. 7 is a front view of the current collecting member shown in Fig. 6;
  • FIG. 8 is a flowchart of a method for manufacturing a battery cell provided in some embodiments of the present application.
  • FIG. 9 is a flow chart of a method for manufacturing a battery cell provided by another embodiment of the present application.
  • Fig. 10 is a schematic block diagram of a manufacturing device for a battery cell provided by some embodiments of the present application.
  • Icons 10-box; 11-first part; 12-second part; 20-battery unit; 21-housing; 22-cell; 221-main body; 222b-negative pole tab; 2221-first connecting part; 2222-second connecting part; 23-end cap assembly; 231-end cap; 232-insulator; 2321-inner surface; 2322-first concave part; 2322a-bottom 2323-outer surface; 2324-first protrusion; 233-electrode terminal; 233a-positive electrode terminal; 233b-negative electrode terminal; 243-second header; 244-accommodating space; 245-boss; 246-third header; 25-pressure relief mechanism; 26-accommodation gap; 100-battery; 200-controller; 300-motor; 1000-vehicle; 2000-manufacturing equipment; 2100-first providing device; 2200-second providing device; 2300-third providing device; 2400-fourth providing device; 2500-assembling device; Z-first direction; X- Second
  • connection In the description of this application, it should be noted that, unless otherwise clearly stipulated and limited, the terms “installation”, “connection”, “connection” and “attachment” should be understood in a broad sense, for example, it may be a fixed connection, It can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediary, and it can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.
  • the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length and width of the integrated device, are for illustrative purposes only, and should not constitute any limitation to the application .
  • “Plurality” in this application refers to two or more (including two).
  • the battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, which are not limited in the embodiments of the present application.
  • the battery cell can be in the form of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application.
  • Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square battery cells and pouch battery cells, which are not limited in this embodiment of the present application.
  • the battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack, and the like.
  • Batteries generally include a case for enclosing one or more battery cells. The box can prevent liquid or other foreign objects from affecting the charging or discharging of the battery cells.
  • the battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive pole piece, a negative pole piece and a separator.
  • a battery cell works primarily by moving metal ions between the positive and negative pole pieces.
  • the positive pole piece includes a positive current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector.
  • the material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon.
  • the material of the isolation film may be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene).
  • the electrode assembly may be a wound structure or a laminated structure, which is not limited in the embodiment of the present application.
  • a battery cell generally includes a casing, a battery cell, an end cap assembly, and a current-collecting member.
  • the tabs of the battery cell are electrically connected to the end cap assembly through the current-collecting member.
  • the opening of the shell provides a closed space for the battery cell and electrolyte.
  • an embodiment of the present application provides a battery cell, and the battery cell includes a casing, a cell, an end cap assembly, and a current collecting member.
  • the electric core includes a main body and a tab, and the tab protrudes from one end of the main body in the first direction.
  • the casing has an opening, and the casing is used for accommodating the electric core.
  • the end cap assembly is used to cover the opening.
  • the current collecting member is located on the side of the main body facing the end cover assembly, and the current collecting member is used for connecting the tab and the end cover assembly.
  • the tab includes a first connecting portion for connecting with the current collecting member, and in the first direction, the first connecting portion is configured to be located on a side of the current collecting member facing the end cap assembly.
  • the battery cells described in the embodiments of the present application are applicable to batteries and electric devices using batteries.
  • Electrical devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and power tools, etc.
  • Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles;
  • spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.;
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric boat toys and electric airplane toys, etc.;
  • electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, electric planers, and more.
  • the embodiment of the present application does not impose special limitations on the above electric equipment.
  • FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • a battery 100 is disposed inside the vehicle 1000 .
  • the battery 100 can be used for power supply of the vehicle 1000 , for example, the battery 100 can be used as an operating power source of the vehicle 1000 .
  • the vehicle 1000 may further include a controller 200 and a motor 300 , the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, for starting, navigating and running the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but can also be used as a driving power source for the vehicle 1000 to provide driving power for the vehicle 1000 instead of or partially replacing fuel oil or natural gas.
  • FIG. 2 is a schematic structural diagram of a battery 100 provided by some embodiments of the present application.
  • the battery 100 includes a box body 10 and a battery cell 20 .
  • the box body 10 is used to accommodate the battery cell 20 .
  • the box body 10 is a component for accommodating the battery cells 20 , and the box body 10 provides a storage space for the battery cells 20 , and the box body 10 may adopt various structures.
  • the box body 10 may include a first part 11 and a second part 12 , and the first part 11 and the second part 12 cover each other to define a storage space for accommodating the battery cells 20 .
  • the first part 11 and the second part 12 can be in various shapes, such as cuboid, cylinder and so on.
  • the first part 11 can be a hollow structure with one side open, and the second part 12 can also be a hollow structure with one side open.
  • the open side of the second part 12 is covered with the open side of the first part 11 to form a box with accommodating space.
  • first part 11 is a hollow structure with one side open
  • second part 12 is a plate-like structure
  • the second part 12 covers the open side of the first part 11 to form a box body 10 with a receiving space.
  • the first part 11 and the second part 12 can be sealed by a sealing element, and the sealing element can be a sealing ring, a sealant, or the like.
  • the battery 100 there may be one or a plurality of battery cells 20 . If there are multiple battery cells 20 , the multiple battery cells 20 may be connected in series, in parallel or in parallel.
  • the mixed connection means that the multiple battery cells 20 are both in series and in parallel.
  • a plurality of battery cells 20 may be connected in series or in parallel or mixed to form a battery module, and then a plurality of battery modules may be connected in series or in parallel or mixed to form a whole and accommodated in the box 10 . It is also possible that all the battery cells 20 are directly connected in series, parallel or mixed together, and then all the battery cells 20 are housed in the case 10 as a whole.
  • the battery 100 may further include a confluence component, through which the plurality of battery cells 20 may be electrically connected, so as to realize series connection, parallel connection or mixed connection of the plurality of battery cells 20 .
  • the bus component may be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, and the like.
  • FIG. 3 is an exploded view of a battery cell 20 provided by some embodiments of the present application.
  • the battery cell 20 may include a casing 21 , a cell 22 , an end cap assembly 23 and a current collecting member 24 .
  • the casing 21 is a component for accommodating the electric core 22.
  • the casing 21 may be a hollow structure with an opening at one end, or a hollow structure with openings at opposite ends.
  • the housing 21 can be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, and the like.
  • the housing 21 can be in various shapes, such as cylinder, cuboid and so on. Exemplarily, in FIG. 3 , the casing 21 is a cuboid structure.
  • the battery cell 22 is a part where the electrochemical reaction occurs in the battery cell 20 .
  • the battery cell 22 includes a main body 221 and a tab 222 .
  • the tab 222 protrudes from one end of the main body 221 .
  • the tab 222 is divided into a positive tab 222 a and a negative tab 222 b.
  • the battery core 22 may be one electrode assembly, or may be composed of multiple electrode assemblies.
  • the electrode assembly can include a positive pole piece, a negative pole piece and a separator.
  • the electrode assembly can be a wound structure formed by winding the positive pole piece, the separator and the negative pole piece, or it can be composed of the positive pole piece, the separator A laminated structure formed by laminating the negative pole pieces.
  • the positive electrode sheet may include a positive electrode collector and a positive electrode active material layer coated on opposite sides of the positive electrode collector.
  • the negative electrode sheet may include a negative electrode current collector and a negative electrode active material layer coated on opposite sides of the negative electrode current collector.
  • the electrode assembly includes a body part, a positive pole tab and a negative pole tab.
  • the body part is the part of the electrode assembly corresponding to the area of the pole piece coated with an active material layer
  • the positive pole tab can be a positive pole piece that is not coated with a positive electrode active material layer.
  • the part of the negative electrode tab can be the part of the negative electrode sheet that is not coated with the negative electrode active material layer.
  • the body part of the electrode assembly is the main body 221 of the cell 22
  • the positive tab of the electrode assembly is the positive tab 222a of the cell 22
  • the negative tab of the electrode assembly is It is the negative tab 222b of the battery cell 22 .
  • the main body 221 of the cell 22 can be composed of the body parts of all the electrode assemblies
  • the positive tab 222a of the cell 22 can also be composed of positive tabs of multiple electrode assemblies.
  • the negative tab 222b of the battery cell 22 may be composed of negative tabs of multiple electrode assemblies.
  • there may be one positive pole tab 222 a and negative pole tab 222 b of the battery cell 22 or there may be multiple ones.
  • FIG. 3 there are two positive tabs 222 a and two negative tabs 222 b of the battery cell 22 , the positive tabs of a part of the electrode assembly are laminated and bent to form a positive tab 222 a , and the negative tabs of a part of the electrode assembly are stacked and bent to form a positive tab 222 a .
  • the sub tabs are stacked and bent to form a negative tab 222b, the positive tabs of another part of the electrode assembly are stacked and bent to form another positive tab 222a, and the negative tabs of another part of the electrode assembly are stacked and bent to form another The negative electrode tab 222b.
  • the end cover assembly 23 includes an end cover 231 , which is a component that covers the opening of the casing 21 to isolate the internal environment of the battery cell 20 from the external environment.
  • the end cap 231 covers the opening of the housing 21 , and the end cap 231 and the housing 21 jointly define a sealed space for containing the battery cell 22 , electrolyte and other components.
  • the shape of the end cap 231 can be adapted to the shape of the housing 21.
  • the housing 21 is a rectangular parallelepiped structure
  • the end cap 231 is a rectangular plate-shaped structure compatible with the housing 21.
  • the housing 21 is a cylinder.
  • the end cover 231 is a circular plate-shaped structure suitable for the housing 21.
  • the material of the end cover 231 can also be various, for example, copper, iron, aluminum, steel, aluminum alloy, etc.
  • the material of the end cover 231 and the material of the housing 21 can be the same or different.
  • the end cap assembly 23 may further include an insulating member 232 , which is a part separating the end cap 231 and the electric core 22 , so as to insulate and isolate the end cap 231 and the electric core 22 .
  • the insulating member 232 is made of insulating material, such as rubber, plastic and so on.
  • the end cover assembly 23 may further include an electrode terminal 233 installed on the end cover 231 , and the electrode terminal 233 is used to electrically connect with the tab 222 of the electrode assembly to output electric energy of the battery cell 20 .
  • the electrode terminal 233 may include a positive electrode terminal 233a and a negative electrode terminal 233b, the positive electrode terminal 233a is used for electrical connection with the positive electrode tab 222a, and the negative electrode terminal 233b is used for electrically connecting with the negative electrode tab 222b.
  • the current collecting member 24 is a component for realizing the electrical connection between the end cover assembly 23 and the tab 222 .
  • the current collecting member 24 may be connected between the electrode terminal 233 and the tab 222 to realize the electrical connection between the end cap assembly 23 and the tab 222 .
  • the positive electrode terminal 233a can be connected to the positive electrode tab 222a through a current collecting member 24
  • the negative electrode terminal 233b can be connected to the negative electrode tab 222b through another current collecting member 24 .
  • the battery cell 20 may further include a pressure relief mechanism 25, which is used to activate when the internal pressure or temperature of the battery cell 20 reaches a threshold value, so as to discharge the battery cell. body 20 internal pressure.
  • Actuation means that the pressure release mechanism 25 is activated or activated to a certain state, so that the internal pressure and temperature of the battery cell 20 can be released.
  • Actions produced by the pressure relief mechanism 25 may include, but are not limited to: at least a portion of the pressure relief mechanism 25 ruptures, shatters, is torn, or opens, and the like.
  • the pressure relief mechanism 25 When the pressure relief mechanism 25 is actuated, the high temperature and high pressure material inside the battery cell 20 will be discharged from the actuated part as discharge. In this way, the pressure and temperature of the battery cells 20 can be released under controllable pressure or temperature, thereby avoiding potential more serious accidents.
  • the discharge of the battery cell 20 includes, but is not limited to: electrolyte, dissolved or split positive and negative pole pieces, fragments of the separator, high temperature and high pressure gas generated by the reaction, flames, and the like.
  • the pressure relief mechanism 25 can be an independent component installed on the end cover 231 , for example, the pressure relief mechanism 25 can be an explosion-proof valve, a burst disk, an air valve, a pressure relief valve or a safety valve installed on the end cover 231 .
  • the pressure relief mechanism 25 may also be a part of the end cover 231 , for example, the end cover 231 is provided with a notch groove, and the area defined by the notch groove forms the pressure relief mechanism 25 .
  • FIG. 4 is a cross-sectional view of the battery cell 20 shown in FIG.
  • the current collecting member 24 The battery core 22 includes a main body 221 and a pole ear 222 , and the pole ear 222 protrudes from one end of the main body 221 in the first direction Z.
  • the casing 21 has an opening, and the casing 21 is used for accommodating the electric core 22.
  • the end cap assembly 23 is used to cover the opening.
  • the current collecting member 24 is located on the side of the main body 221 facing the end cover assembly 23 , and the current collecting member 24 is used to connect the tab 222 and the end cover assembly 23 .
  • the tab 222 includes a first connecting portion 2221 for connecting with the current collecting member 24 , and in the first direction Z, the first connecting portion 2221 is configured to be located on a side of the current collecting member 24 facing the end cap assembly 23 .
  • the current collecting member 24 is a component for realizing the electrical connection between the end cover assembly 23 and the tab 222 . It may be that only the positive electrode tab 222a is connected to the end cap assembly 23 through the current collecting member 24 , or only the negative electrode tab 222b is connected to the end cap assembly 23 through the current collecting member 24 .
  • the positive pole tab 222a and the negative pole tab 222b are respectively located at both ends of the main body 221 in the first direction Z, the positive pole tab 222a is connected to the end cap assembly 23 through the current collecting member 24, and the negative pole tab 222b is connected to the housing 21 connect.
  • the positive pole tab 222a and the negative pole tab 222b are respectively connected to an end cap assembly 23 through a current collecting member 24.
  • the positive electrode tab 222a is connected to one end cap assembly 23 through a current collecting member 24
  • the negative electrode tab 222b is connected to the other end cap assembly 23 through another current collecting member 24 .
  • the current collecting member 24 is a conductor, which can be made of copper, iron, aluminum, steel, aluminum alloy and other materials.
  • the current collecting member 24 can be connected to different positions of the end cap assembly 23 .
  • the tab 222 is connected to the end cover 231 through the current collecting member 24;
  • the end cover assembly 23 includes the end cover 231, the insulator 232 and the electrode terminal 233 , the tab 222 is connected to the electrode terminal 233 through the current collecting member 24 .
  • the first connection part 2221 is a part where the tab 222 is connected to the current collecting member 24 .
  • the first connecting portion 2221 and the current collecting member 24 can be directly connected, for example, the two are directly welded;
  • the glue layer is connected indirectly.
  • the first direction Z is the thickness direction of the end cap assembly 23 .
  • the gap between the current collecting member 24 and the end cap assembly 23 is fully utilized.
  • the space between them reduces the space occupied by the tabs 222 inside the housing 21 , and can free up more space for the main body 221 of the electrode assembly, which is beneficial to improving the energy density of the battery cell 20 .
  • the current collecting member 24 is provided with a folded portion 241, and the folded portion 241 is foldably disposed on the side of the current collecting member 24 facing the end cover assembly 23 in the first direction Z, and the folded portion 241 Used to connect the first connecting part 2221.
  • the folded portion 241 is a portion capable of being folded relative to the current collecting member 24 and connected to the first connecting portion 2221 .
  • the current collecting member 24 is provided with a folded portion 241 and connected to the first connecting portion 2221, so that the current collecting member 24 and the first connecting portion 2221 are indirectly connected through the folded portion 241, so as to realize the electrical connection between the first connecting portion 2221 and the current collecting member 24. connect.
  • the folded portion 241 is a conductor, and the folded portion 241 may be made of materials such as copper, iron, aluminum, steel, and aluminum alloy.
  • the folded portion 241 and the current collecting member 24 may be integrally formed, and a crease may be formed between the folded portion 241 and the current collecting member 24, and the folded portion 241 may be folded around the crease as a rotation axis.
  • the folded portion 241 and the current collecting member 24 may also be separated and then connected together.
  • the folded portion 241 and the current collecting member 24 are welded together.
  • the folded portion 241 and the first connecting portion 2221 may also be connected in various ways, such as welding, bonding through a conductive adhesive layer, and the like.
  • the current collecting member 24 is provided with a folded portion 241 that can be folded. Before the folded portion 241 is folded, the first connection portion 2221 and the folded portion 241 can be connected together, such as welding, bonding through a conductive adhesive layer, etc. , it is more convenient to realize the electrical connection between the first connecting portion 2221 and the current collecting member 24 . After the first connecting portion 2221 is connected to the folded portion 241, the folded portion 241 can be folded relative to the current collecting member 24, and the first connecting portion 2221 is naturally arranged on the side of the current collecting member 24 facing the end cap assembly 23. side, improving the plastic effect on the tab 222.
  • the first connecting portion 2221 and the folded portion 241 are stacked, and the first connecting portion 2221 is located on a side of the folded portion 241 facing the end cover assembly 23 . side.
  • the stacked arrangement of the first connecting portion 2221 and the folded portion 241 means that the first connecting portion 2221 and the folded portion 241 are in contact with each other and stacked together. Both the first connecting portion 2221 and the folded portion 241 may be in a sheet structure. Of course, both the folded portion 241 and the current collecting member 24 can also be stacked in the first direction Z, so as to eliminate the gap between the folded portion 241 and the current collecting member 24 .
  • the first connecting portion 2221 and the folded portion 241 are stacked in the first direction Z, and the first connecting portion 2221 is located on the side of the folded portion 241 facing the end cover assembly 23.
  • This structure ensures on the one hand There is a larger flow area between the first connecting portion 2221 and the folded portion 241.
  • the overall compactness of the first connecting portion 2221 and the folded portion 241 is reduced, and the first connecting portion 2221 and the folded portion 241 are reduced.
  • the overall thickness reduces the risk that the space inside the casing 21 for accommodating the main body 221 is reduced due to the overall thickness of the first connecting portion 2221 and the folded portion 241 increasing the distance between the current collecting member 24 and the end cover assembly 23 .
  • the first connecting portion 2221 can also be covered on the outside of the folded portion 241, so that a part of the first connecting portion 2221 is located on the side of the folded portion 241 facing the end cap assembly 23, and the first connecting portion 2221 The other part is located between the folded portion 241 and the current collecting member 24 to increase the contact area between the first connecting portion 2221 and the folded portion 241 .
  • the folded portion 241 is foldably connected to the edge of the current collecting member 24 .
  • the edge position of the current collecting member 24 refers to the edge position of the outer contour of the current collecting member 24 .
  • the folded portion 241 is foldably connected to an edge position of one end of the current collecting member 24 in the second direction X, and the second direction X is perpendicular to the first direction Z.
  • the second direction X is the width direction of the end cap assembly 23 .
  • the folded portion 241 is foldably connected to the edge position of the current collecting member 24, and creases can be formed at the edge position of the current collecting member 24, which is convenient for the folded portion 241 to be turned over. 241 protects the tab 222 and reduces the risk of cutting the tab 222 by the edge of the current collecting member 24 .
  • the opposite ends of the current collecting member 24 in the second direction X are connected with folded portions 241 , and the second direction X is perpendicular to the first direction Z.
  • the battery cell 22 includes two tabs 222 disposed at intervals along the second direction X on the main body 221 , and the first connecting portions 2221 of the two tabs 222 are respectively connected to the two folded portions 241 .
  • the two tabs 222 respectively connected to the two folded portions 241 of the current collecting member 24 are tabs 222 with the same polarity.
  • the two tabs 222 may both be positive tabs 222a, or both may be negative tabs.
  • ear 222b Taking the two tabs 222 as positive tabs 222a as an example, the battery cell 22 may include a plurality of electrode assemblies arranged along the second direction X, and the positive sub-poles in a part of the plurality of electrode assemblies The ears together form a positive pole tab 222a, and the positive pole tabs in another part of the electrode assemblies among the plurality of electrode assemblies together form another positive pole tab 222a.
  • the first connection parts 2221 of the two tabs 222 of the battery cell 22 are respectively connected to the two turning parts on the current collecting member 24, which can improve the stability of the current collecting member 24 in the casing 21 and reduce the Risk of shaking inside the housing 21.
  • the folded portion 241 and the current collecting member 24 are integrally formed.
  • the folded portion 241 and the current collecting member 24 are formed in a simple manner, which ensures the firmness between them.
  • the tab 222 is bent around the current collecting member 24 .
  • the tab 222 also includes a second connecting portion 2222, which is used to connect the main body 221 and the first connecting portion 2221. In the first direction Z, the second connecting portion 2222 is located on the current collecting member 24 facing the main body 221 side.
  • the second connecting portion 2222 is a portion where the tab 222 is connected between the main body 221 and the first connecting portion 2221 .
  • the tab 222 is bent around the current collecting member 24, that is, a part of the tab 222 is located on the side of the current collecting member 24 facing the end cover assembly 23, and a part is located on the side of the current collecting member 24 facing the main body 221, for example,
  • the first connecting portion 2221 of the tab 222 is located on the side of the current collecting member 24 facing the end cover assembly 23
  • the second connecting portion 2222 of the tab 222 is located on the side of the current collecting member 24 facing the main body 221 .
  • the tab 222 is integrally bent around the current collecting member 24 and the folded portion 241, so that the current collecting member 24 and the folded portion 241 are located between the first connecting portion 2221 and the second connecting portion 2222 in the first direction Z, so that the first connecting portion 2221 is located on the side of the folded portion 241 facing the end cap assembly 23, and the second connecting portion
  • the portion 2222 is located on a side of the current collecting member 24 facing the main body portion 221 .
  • the tab 222 can be bent around the current collecting member 24 and the folded part 241 as a whole, so that the first The connection position of the connecting portion 2221 and the second connecting portion 2222 transitions in a circular arc.
  • the first connecting portion 2221 where the tab 222 is connected to the current collecting member 24 is located on the side of the current collecting member 24 facing the main body 221 . If the battery cell 20 is in a vibrating environment, the main body 221 of the battery cell 22 may move up and down in the casing 21. Under the co-extrusion of the main body 221 and the current collecting member 24, it is easy for the tab 222 to be inserted into the main body. The situation inside the part 221 causes the tab 222 to damage the isolation film, and there is a risk of positive and negative short circuit.
  • the current collecting member 24 plays a good role in limiting the tab 222, reducing the risk of the tab 222 being inserted into the main body 221 .
  • FIG. 5 is a partial cross-sectional view of the battery cell 20 shown in FIG. 3
  • the end cap assembly 23 includes an end cap 231 , an insulating member 232 and an electrode terminal 233 .
  • the end cap 231 is used to cover the opening of the housing 21 (shown in FIG. 4 ).
  • the electrode terminal 233 is provided on the end cap 231 , and the electrode terminal 233 is used for electrical connection with the current collecting member 24 .
  • the insulator 232 is disposed on a side of the end cover 231 facing the main body 221 in the first direction Z, and the insulator 232 is used to separate the end cover 231 from the battery core 22 .
  • the current collecting member 24 includes a first collecting part 242 for connecting with the first connecting part 2221.
  • a receiving gap 26 is formed between the first collecting part 242 and the insulator 232.
  • the receiving gap 26 Used for accommodating the first connecting part 2221 .
  • the electrode terminal 233 is a part for outputting electric power of the battery cell 20 in the end cap assembly 23 .
  • the two electrode terminals 233 are respectively a positive electrode terminal 233a and a negative electrode terminal 233b, and the positive electrode terminal 233a passes through a current collecting member 24 and the positive electrode lug of the cell 22 222a, and the negative electrode terminal 233b is electrically connected to the negative tab 222b of the cell 22 through another current collecting member 24 .
  • the two electrode terminals 233 on the end cap 231 may be arranged at intervals along the third direction Y, and the third direction Y, the second direction X (shown in FIG. 4 ) and the first direction Z are perpendicular to each other.
  • the third direction Y is the length direction of the end cap assembly 23 .
  • the first collecting portion 242 is a portion where the collecting member 24 is connected to the first connecting portion 2221 .
  • the folded portion 241 is arranged on the first collecting portion 242, and the first connecting portion 2221 is indirectly connected to the folded portion 241 through the first collecting portion 242.
  • the folded portion 241 is accommodated in the accommodation gap 26.
  • the folded portion 241 is located on the side of the first collecting portion 242 away from the main body portion 221, and the first connecting portion 2221 is located at the end facing the first collecting portion 242.
  • the receiving gap 26 is formed between the first current collecting portion 242 of the current collecting member 24 and the insulator 232, the first connecting portion 2221 is accommodated in the receiving gap 26, thereby effectively utilizing the gap between the first current collecting portion 242 and the insulator 232.
  • the space between them reduces the space occupied by the tabs 222 inside the housing 21 , and can free up more space for the main body 221 of the electrode assembly, which is beneficial to improving the energy density of the battery cell 20 .
  • the length direction of the end cap assembly 23 is the length direction of the end cap 231
  • the width direction of the end cap assembly 23 is the width direction of the end cap 231
  • the thickness of the end cap assembly 23 The direction is the thickness direction of the end cover 231 .
  • the insulator 232 has an inner surface 2321 facing the main body portion 221, the insulator 232 is provided with a first recess 2322 recessed from the inner surface 2321 in a direction away from the main body 221, the first recess 2322 is used to accommodate the first At least a portion of a header 242 .
  • a receiving gap 26 is formed between the first collector portion 242 and the bottom surface 2322 a of the first concave portion 2322 .
  • the inner surface 2321 of the insulator 232 is the surface of the insulator 232 facing the main body 221 , and the inner surface 2321 may be a plane.
  • the first recess 2322 is a recessed space inside the insulator 232 for accommodating the first header 242 .
  • the first recess 2322 can accommodate a part of the first header 242 or all of the first header 242 .
  • the bottom surface 2322a of the first concave portion 2322 is the surface of the concave portion facing the main body portion 221 in the first direction Z, and also the surface of the concave portion farthest from the main body portion 221 in the first direction Z.
  • the receiving gap 26 refers to the area formed between the surface of the first collecting portion 242 away from the main body portion 221 and the bottom surface 2322 a of the first concave portion 2322 .
  • the first collecting portion 242 is accommodated in the first concave portion 2322, which reduces the space occupied by the first collecting portion 242 inside the housing 21 and frees up more space for the main body 221. It is beneficial to increase the energy density of the battery cell 20 .
  • the insulator 232 has an outer surface 2323 facing away from the main body portion 221, and a first convex portion 2324 protrudes from a position on the outer surface 2323 corresponding to the first concave portion 2322, and the first concave portion 2322 deviates from the inner surface 2321.
  • the direction of the main body 221 is recessed into the first protrusion 2324 .
  • the end cover 231 is provided with a second concave portion for receiving at least a part of the first convex portion 2324 .
  • the outer surface 2323 of the insulating member 232 is the surface of the insulating member 232 facing away from the main body 221 , and the outer surface 2323 may be a plane.
  • the outer surface 2323 can be in contact with the end cover 231 or have a distance from each other.
  • the first convex portion 2324 protrudes from the outer surface 2323 , which can also be understood as the first convex portion 2324 extends from the outer surface 2323 to a direction away from the main body portion 221 .
  • the first recess 2322 is recessed from the inner surface 2321 into the first protrusion 2324 in a direction away from the main body 221 , so that the bottom surface 2322 a of the first recess 2322 is farther away from the outer surface 2323 of the insulator 232 in the first direction Z. on the main body 221 .
  • the second recess is a recessed space in the end cover 231 for accommodating the first protrusion 2324 , and the second recess can accommodate the whole of the first protrusion 2324 or a part of the first protrusion 2324 . If the outer surface 2323 of the insulator 232 is in contact with the end cap 231, the first protrusion 2324 is completely accommodated in the second recess; if there is a distance between the outer surface 2323 of the insulator 232 and the end cap 231, the first protrusion 2324 Partially accommodated in the second recess.
  • the first protrusion 2324 is disposed in the second recess, which can make the structure of the insulator 232 and the end cover 231 more compact, and reduce the space occupied by the insulator 232 inside the casing 21 .
  • the first recess 2322 is recessed from the inner surface 2321 into the first protrusion 2324 in a direction away from the main body 221 , which increases the recess depth of the first recess 2322 , so that the first collector 242 can be accommodated in the first recess 2322 The deeper the position, the more space can be made for the main body part 221 .
  • FIG. 6 is an isometric view of the current collector shown in FIG.
  • the second current collecting part 243 is used to electrically connect with the electrode terminal 233 .
  • the first collector part 242 and the second collector part 243 are arranged in a misaligned position, so that the collector member 24 forms an accommodation space 244 on the side of the first collector part 242 facing the main body part 221, and the accommodation space 244 It is used to accommodate a part of the tab 222 .
  • the second current collecting portion 243 and the electrode terminal 233 may be connected directly or indirectly.
  • the second current collecting portion 243 is provided with a boss 245 , and the boss 245 is connected to the electrode terminal 233 through the insulator 232 .
  • Both the second collecting portion 243 and the first collecting portion 242 may be sheet-like structures.
  • two first collecting parts 242 in the current collecting member 24 may also be provided correspondingly, and the two first collecting parts
  • the flow parts 242 are all connected to the second flow collecting part 243 , and one first flow collecting part 242 is provided with one folded part 241 correspondingly.
  • the accommodating space 244 of the current collecting member 24 is used to accommodate a part of the tab 222.
  • the tab 222 includes a second connection portion 2222 located on the side of the current collecting member 24 facing the main body 221, the accommodating space 244 is used for At least a part of the second connecting portion 2222 of the tab 222 is accommodated.
  • FIG. 7 is a front view of the current collecting member 24 shown in FIG. 246 and the second collecting portion 243 are sequentially connected to form a “Z”-shaped structure, so that the first collecting portion 242 and the second collecting portion 243 are dislocated in the first direction Z.
  • the current collecting member 24 forms an accommodation space for accommodating the tab 222 on the side of the first current collecting portion 242 facing the main body portion 221 244 , so that the tab 222 can move up as a whole, so as to make more space for the main body 221 , which is beneficial to improve the energy density of the battery cell 20 .
  • An embodiment of the present application provides a battery 100 , including a box body 10 and a battery cell 20 provided in any one of the above embodiments, and the box body 10 is used to accommodate the battery cell 20 .
  • An embodiment of the present application provides an electric device, including the battery 100 provided in any one of the foregoing embodiments.
  • the embodiment of the present application provides a prismatic battery, which includes a casing 21 , a cell 22 , an end cap assembly 23 and a current collecting member 24 .
  • the battery cell 22 includes a main body 221, a positive pole lug 222a and a negative pole lug 222b.
  • Both the positive pole lug 222a and the negative pole lug 222b protrude from one end of the main body 221 in the first direction Z, and the positive pole lug 222a passes through a collector
  • the current collecting member 24 is electrically connected to the positive electrode terminal 233 a of the end cap assembly 23
  • the negative electrode tab 222 b is electrically connected to the negative electrode terminal 233 b of the end cap assembly 23 through another current collecting member 24 .
  • Both the positive pole tab 222 a and the negative pole tab 222 b include a first connection portion 2221 .
  • the current collecting member 24 is provided with a folded portion 241, the folded portion 241 is connected to the first connecting portion 2221, and the folded portion 241 is foldably arranged on the current collecting member 24 facing the end cover assembly 23 in the first direction Z. so that the first connecting portion 2221 is located on the side of the current collecting member 24 facing the end cap assembly 23 .
  • the electrical connection between the first connecting portion 2221 and the current collecting member 24 can be conveniently realized through the folded portion 241.
  • the part 2221 is arranged on the side of the current collecting member 24 facing the end cover assembly 23, improving the shaping effect on the positive electrode tab 222a and the negative electrode tab 222b, making full use of the space between the current collecting member 24 and the end cover assembly 23, reducing the The space occupied by the positive pole tab 222a and the negative pole tab 222b is reduced, which can free up more space for the main body part 221 of the electrode assembly, which is beneficial to improve the energy density of the battery cell 20 .
  • FIG. 8 is a flowchart of a method for manufacturing a battery cell 20 provided in some embodiments of the present application.
  • An embodiment of the present application provides a method for manufacturing a battery cell 20.
  • the manufacturing method includes:
  • the battery cell 22 includes a main body 221 and a tab 222, the tab 222 protrudes from one end of the main body 221 in the first direction Z, and the tab 222 includes a first connection part 2221;
  • the current collecting member 24 is located on the side of the main body portion 221 facing the end cover assembly 23
  • the first connecting portion 2221 is located on the side of the current collecting member 24 facing the end cover assembly 23 .
  • step S100, step S200, step S300 and step S400 is not limited.
  • step S400 may be performed first, then step S300, then step S200, and then step S100.
  • step S500 and step S600 is not limited, for example, step S600 may be executed first, and then step S500 may be executed.
  • FIG. 9 is a flow chart of a method for manufacturing a battery cell 20 provided in another embodiment of the present application.
  • step S500 may include:
  • FIG. 10 is a schematic block diagram of a manufacturing equipment 2000 for a battery cell 20 provided in some embodiments of the present application.
  • Embodiments of the present application also provide a manufacturing device 2000 for a battery cell 20.
  • the manufacturing equipment 2000 includes a first A providing device 2100 , a second providing device 2200 , a third providing device 2300 , a fourth providing device 2400 and an assembly device 2500 .
  • the first providing device 2100 is used to provide the electric core 22, the electric core 22 includes a main body 221 and a tab 222, the tab 222 protrudes from one end of the main body 221 in the first direction Z, and the tab 222 includes a first connecting portion 2221.
  • the second providing device 2200 is used for providing the casing 21, and the casing 21 has an opening.
  • the third providing device 2300 is used for providing the end cap assembly 23 .
  • the fourth providing device 2400 is used to provide the current collecting member 24 .
  • the assembly device 2500 is used to connect the current collecting member 24 to the first connection part 2221 and the end cover assembly 23; the assembly device 2500 is also used to accommodate the electric core 22 in the housing 21; the assembly device 2500 is also used to assemble the end cover assembly 23 covers the opening.
  • the current collecting member 24 is located on the side of the main body portion 221 facing the end cover assembly 23
  • the first connecting portion 2221 is located on the side of the current collecting member 24 facing the end cover assembly 23 .

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Abstract

本申请实施例提供了一种电池单体、电池、用电设备及电池单体的制造方法和设备，属于电池技术领域。其中，电池单体包括壳体、电芯、端盖组件和集流构件。电芯包括主体部和极耳，极耳凸出于主体部在第一方向上的一端。壳体具有开口，壳体用于容纳电芯。端盖组件用于盖合于开口。在第一方向上，集流构件位于主体部面向端盖组件的一侧，集流构件用于连接极耳和端盖组件。极耳包括用于与集流构件连接的第一连接部，沿第一方向，第一连接部被配置为位于集流构件面向端盖组件的一侧。这种结构的电池单体充分利用了集流构件与端盖组件之间的空间，减小了极耳占用壳体内部的空间，能够为电极组件的主体部腾出更多的空间，有利于提高电池单体的能量密度。

Description

电池单体、电池、用电设备及电池单体的制造方法和设备 技术领域
本申请涉及电池技术领域，具体而言，涉及一种电池单体、电池、用电设备及电池单体的制造方法和设备。
背景技术
随着新能源技术的发展，电池的应用越来越广泛，例如手机、笔记本电脑、电瓶车、电动汽车、电动飞机、电动轮船、电动玩具汽车、电动玩具轮船、电动玩具飞机和电动工具等等。
在电池技术中，既需要考虑电池的安全性，也需要考虑电池性能的问题，电池的能量密度的大小影响着电池的性能。因此，如何提升电池单体的能量密度是电池技术中一个亟待解决的技术问题。
发明内容
本申请实施例提供一种电池单体、电池、用电设备及电池单体的制造方法和设备，有利于提升电池单体的能量密度。
第一方面，本申请实施例提供一种电池单体，包括：电芯，包括主体部和极耳，所述极耳凸出于所述主体部在第一方向上的一端；壳体，具有开口，所述壳体用于容纳所述电芯；端盖组件，用于盖合于所述开口；集流构件，在第一方向上，所述集流构件位于所述主体部面向所述端盖组件的一侧，所述集流构件用于连接所述极耳和所述端盖组件；其中，所述极耳包括用于与所述集流构件连接的第一连接部，在所述第一方向上，所述第一连接部被配置为位于所述集流构件面向所述端盖组件的一侧。
上述技术方案中，极耳与集流构件连接的第一连接部位于集流构件面向端盖组件的一侧，充分利用了集流构件与端盖组件之间的空间，减小了极耳占用壳体内部的空间，能够为电极组件的主体部腾出更多的空间，有利于提高电池单体的能量密度。
在一些实施例中，所述集流构件设置有翻折部，所述翻折部可翻折地设置于所述集流构件在所述第一方向上面向所述端盖组件的一侧，所述翻折部用于连接所述第一连接部。
上述技术方案中，集流构件上设置有能够翻折的翻折部，在翻折部翻折前可以将第一连接部与翻折部连接在一起，更为方便地实现第一连接部与集流构件的电连接。在将第一连接部连接于翻折部后，可以使翻折部相对集流构件翻折，自然地将第一连接部布置于集流构件面向端盖组件的一侧，改善对极耳的整形效果。
在一些实施例中，在所述第一方向上，所述第一连接部与所述翻折部层叠设置，且所述第一连接部位于所述翻折部面向所述端盖组件的一侧。
上述技术方案中，第一连接部与翻折部在第一方向上层叠设置，第一连接部位于翻折部面向端盖组件的一侧，这种结构一方面保证第一连接部与翻折部两者之间具有较大的过流面积，另一方面使得第一连接部和翻折部整体紧凑，降低第一连接部和翻折部整体的厚度，降低因第一连接部和翻折部整体过厚使集流构件距离端盖组件增大，而造成壳体内部用于容纳主体部的空间减小的风险。
在一些实施例中，所述翻折部可翻折地连接于所述集流构件的边缘位置。
上述技术方案中，翻折部可翻折地连接于集流构件的边缘位置，翻折部对极耳起到保护作用，降低集流构件的边缘割伤极耳的风险。
在一些实施例中，所述集流构件在第二方向上相对的两端均连接有所述翻折部，所述第二方向垂直于所述第一方向；所述电芯包括沿所述第二方向上间隔设置于主体部的两个所述极耳，两个所述极耳的第一连接部分别连接于两个所述翻折部。
上述技术方案中，电芯的两个极耳的第一连接部分别连接于集流构件上的两个翻转部，能够提高集流构件在壳体内的稳定性，降低集流构件在壳体内晃动的风险。
在一些实施例中，所述翻折部与所述集流构件为一体成型结构。
上述技术方案中，翻折部与集流构件为一体成型结构，翻折部与集流构件成型方式简单，保证两者之间的牢固性。
在一些实施例中，所述极耳绕着所述集流构件弯折；所述极耳还包括第二连接部，所述第二连接部用于连接所述主体部和所述第一连接部，在所述第一方向上，所述第二连接部位于所述集流构件面向所述主体部的一侧。
上述技术方案中，极耳绕着集流构件弯折，使得集流构件对极耳起到很好的限位作用，降低极耳插入主体部内的风险。
在一些实施例中，所述端盖组件包括：端盖，用于盖合于所述开口；电极端子，设置于所述端盖，用于与所述集流构件电连接；绝缘件，设置于所述端盖在所述第一方向上面向所述主体部的一侧，所述绝缘件用于分隔所述端盖和所述电芯；所述集流构件包括用于与所述第一连接部连接的第一集流部，在所述第一方向上，所述第一集流部与所述绝缘件之间形成有收容间隙，所述收容间隙用于收容所述第一连接部。
上述技术方案中，集流构件的第一集流部与绝缘件之间形成收容间隙，第一连接部收容于收容间隙内，从而有效利用了第一集流部与绝缘件之间的空间，减小了极耳占用壳体内部的空间，能够为电极组件的主体部腾出更多的空间，有利于提高电池单体的能量密度。
在一些实施例中，所述绝缘件具有面向所述主体部的内表面，所述绝缘件设有从所述内表面沿背离所述主体部的方向凹陷的第一凹部，所述第一凹部用于容纳所述第一集流部的至少一部分；在所述第一方向上，所述第一集流部与所述第一凹部的底面之间形成所述收容间隙。
上述技术方案中，绝缘件上设有第一凹部，第一集流部的至少一部分容纳于第一凹部内，减少了第一集流部占用壳体内部的空间，以为主体部腾出更多的空间，有利于提升电池单体的能量密度。
在一些实施例中，所述绝缘件具有背离所述主体部的外表面，所述外表面与所述第一凹部相对应的位置凸设有第一凸部，所述第一凹部从所述内表面沿背离所述主体部的方向凹陷至所述第一凸部内；所述端盖设有第二凹部，所述第二凹部用于容纳第一凸部的至少一部分。
上述技术方案中，第一凸部的至少一部分设置于第二凹部内，能够使得绝缘件与端盖两者结构更为紧凑，减少绝缘件占用壳体内部的空间。第一凹部从内表面沿背离主体部的方向凹陷至第一凸部内，增大了第一凹部的凹陷深度，使得第一集流部能够容纳至第一凹部的更深位置，以为主体部腾出更多的空间。
在一些实施例中，所述集流构件还包括第二集流部，所述第二集流部连接于所述第一集流部，所述第二集流部用于与所述电极端子电连接；在所述第一方向上，所述第一集流部与所述第二集流部错位设置，使得所述集流构件在所述第一集流部面向所述主体部的一侧形成容纳空间，所述容纳空间用于容纳所述极耳的一部分。
上述技术方案中，第一集流部与第二集流部在第一方向上错位设置，使得集流构件在第一集流部面向主体部的一侧形成容纳极耳的容纳空间，使得极耳能够整体上移，为主体部腾出更多的空间，有利于提高电池单体的能量密度。
第二方面，本申请实施例提供一种电池，包括：第一方面任意一个实施例提供的电池单体；以及箱体，用于容纳所述电池单体。
第三方面，本申请实施例提供一种用电设备，包括第二方面任意一个实施例提供的电池。
第四方面，本申请实施例提供一种电池单体的制造方法，所述制造方法包括：提供电芯，所述电芯包括主体部和极耳，所述极耳凸出于所述主体部在第一方向上的一端，所述极耳包括第一 连接部；提供壳体，所述壳体具有开口；提供端盖组件；提供集流构件；将所述集流构件连接于所述第一连接部和所述端盖组件；将所述电芯容纳于所述壳体内；将端盖组件盖合于所述开口；其中，在所述第一方向上，所述集流构件位于所述主体部面向所述端盖组件的一侧，所述第一连接部位于所述集流构件面向所述端盖组件的一侧。
在一些实施例中，所述集流构件设置有翻折部；所述将所述集流构件连接于所述极耳和所述端盖组件包括：将所述第一连接部连接于所述翻折部；将所述翻折部相对于所述集流构件翻折，使得所述极耳绕着集流构件弯折；将所述端盖组件与所述集流构件连接，以使所述第一连接部位于所述集流构件面向所述端盖组件的一侧。
第五方面，本申请实施例还提供一种电池单体的制造设备，所述制造设备包括：第一提供装置，用于提供电芯，所述电芯包括主体部和极耳，所述极耳凸出于所述主体部在第一方向上的一端，所述极耳包括第一连接部；第二提供装置，用于提供壳体，所述壳体具有开口；第三提供装置，用于提供端盖组件；第四提供装置，用于提供集流构件；组装装置，用于将所述集流构件连接于所述第一连接部和所述端盖组件；还用于将所述电芯容纳于所述壳体内；还用于将端盖组件盖合于所述开口；其中，在所述第一方向上，所述集流构件位于所述主体部面向所述端盖组件的一侧，所述第一连接部位于所述集流构件面向所述端盖组件的一侧。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本申请一些实施例提供的车辆的结构示意图；
图2为本申请一些实施例提供的电池的结构示意图；
图3为本申请一些实施例提供的电池单体的爆炸图；
图4为图3所示的电池单体的剖视图；
图5为图3所示的电池单体的局部剖视图；
图6为图5所示的集流体的轴测图；
图7为图6所示的集流构件的主视图；
图8为本申请一些实施例提供的电池单体的制造方法的流程图；
图9为本申请另一些实施例提供的电池单体的制造方法的流程图；
图10为本申请一些实施例提供的电池单体的制造设备的示意性框图。
图标：10-箱体；11-第一部分；12-第二部分；20-电池单体；21-壳体；22-电芯；221-主体部；222-极耳；222a-正极极耳；222b-负极极耳；2221-第一连接部；2222-第二连接部；23-端盖组件；231-端盖；232-绝缘件；2321-内表面；2322-第一凹部；2322a-底面；2323-外表面；2324-第一凸部；233-电极端子；233a-正极电极端子；233b-负极电极端子；24-集流构件；241-翻折部；242-第一集流部；243-第二集流部；244-容纳空间；245-凸台；246-第三集流部；25-泄压机构；26-收容间隙；100-电池；200-控制器；300-马达；1000-车辆；2000-制造设备；2100-第一提供装置；2200-第二提供装置；2300-第三提供装置；2400-第四提供装置；2500-组装装置；Z-第一方向；X-第二方向；Y-第三方向。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，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地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前 提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“附接”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，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请的实施例中，相同的附图标记表示相同的部件，并且为了简洁，在不同实施例中，省略对相同部件的详细说明。应理解，附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸，以及集成装置的整体厚度、长宽等尺寸仅为示例性说明，而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
本申请中，电池单体可以包括锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。电池单体一般按封装的方式分成三种：柱形电池单体、方形电池单体和软包电池单体，本申请实施例对此也不限定。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池模块或电池包等。电池一般包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
电池单体包括电极组件和电解液，电极组件由正极极片、负极极片和隔离膜组成。电池单体主要依靠金属离子在正极极片和负极极片之间移动来工作。正极极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面。负极集流体的材料可以为铜，负极活性物质可以为碳或硅等。隔离膜的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。此外，电极组件可以是卷绕式结构，也可以是叠片式结构，本申请实施例并不限于此。
目前，电池单体一般包括壳体、电芯、端盖组件和集流构件，电芯的极耳与端盖组件通过集流构件电连接，电芯容纳于壳体内，端盖组件盖合于壳体的开口，以为电芯和电解液提供一个密闭空间。
发明人发现，在电池单体中，电芯的极耳与集流构件连接的部分位于集流构件背离端盖组件的一侧，极耳占用壳体内部的一部分空间，使得壳体内部能够提供给电芯的主体部的空间减小，电池单体的能量密度也随之减小。发明人注意到，对于一般的电池单体而言，集流构件与端盖组件连接后，集流构件部分区域与端盖组件之间存在间隙，该间隙位置的空间并未得到有效利用。
鉴于此，本申请实施例提供一种电池单体，电池单体包括壳体、电芯、端盖组件和集流构件。电芯包括主体部和极耳，极耳凸出于主体部在第一方向上的一端。壳体具有开口，壳体用于容纳电芯。端盖组件用于盖合于开口。在第一方向上，集流构件位于主体部面向端盖组件的一侧，集流构件用于连接极耳和端盖组件。其中，极耳包括用于与集流构件连接的第一连接部，在第一方向上，第一连接部被配置为位于集流构件面向端盖组件的一侧。
在这样的电池单体中，通过将极耳的第一连接部设置在集流构件面向端盖组件的一侧，充分利用了集流构件与端盖组件之间的空间，减小了极耳占用壳体内部的空间，能够为电芯的主体部 腾出更多的空间，有利于提高电池单体的能量密度。
本申请实施例描述的电池单体适用于电池以及使用电池的用电设备。
用电设备可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等；航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等；电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。本申请实施例对上述用电设备不做特殊限制。
以下实施例为了方便说明，以用电设备为车辆为例进行说明。
请参照图1，图1为本申请一些实施例提供的车辆1000的结构示意图，车辆1000的内部设置有电池100，电池100可以设置在车辆1000的底部或头部或尾部。电池100可以用于车辆1000的供电，例如，电池100可以作为车辆1000的操作电源。
车辆1000还可以包括控制器200和马达300，控制器200用来控制电池100为马达300供电，例如，用于车辆1000的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中，电池100不仅仅可以作为车辆1000的操作电源，还可以作为车辆1000的驱动电源，代替或部分地代替燃油或天然气为车辆1000提供驱动动力。
请参照图2，图2为本申请一些实施例提供的电池100的结构示意图，电池100包括箱体10和电池单体20，箱体10用于容纳电池单体20。
其中，箱体10是容纳电池单体20的部件，箱体10为电池单体20提供收容空间，箱体10可以采用多种结构。在一些实施例中，箱体10可以包括第一部分11和第二部分12，第一部分11与第二部分12相互盖合，以限定出用于容纳电池单体20的收容空间。第一部分11和第二部分12可以是多种形状，比如，长方体、圆柱体等。第一部分11可以是一侧开放的空心结构，第二部分12也可以是一侧开放的空心结构，第二部分12的开放侧盖合于第一部分11的开放侧，则形成具有收容空间的箱体10。也可以是第一部分11为一侧开放的空心结构，第二部分12为板状结构，第二部分12盖合于第一部分11的开放侧，则形成具有收容空间的箱体10。第一部分11与第二部分12可以通过密封元件来实现密封，密封元件可以是密封圈、密封胶等。
在电池100中，电池单体20可以是一个、也可以是多个。若电池单体20为多个，多个电池单体20之间可串联或并联或混联，混联是指多个电池单体20中既有串联又有并联。可以是多个电池单体20先串联或并联或混联组成电池模块，多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体10内。也可以是所有电池单体20之间直接串联或并联或混联在一起，再将所有电池单体20构成的整体容纳于箱体10内。
在一些实施例中，电池100还可以包括汇流部件，多个电池单体20之间可通过汇流部件实现电连接，以实现多个电池单体20的串联或并联或混联。汇流部件可以是金属导体，比如，铜、铁、铝、不锈钢、铝合金等。
请参照图3，图3为本申请一些实施例提供的电池单体20的爆炸图，电池单体20可以包括壳体21、电芯22、端盖组件23和集流构件24。
壳体21是用于容纳电芯22的部件，壳体21可以是一端形成开口的空心结构，也可以是相对的两端形成开口的空心结构。壳体21的材质可以是多种，比如，铜、铁、铝、钢、铝合金等。壳体21可以是多种形状，比如，圆柱体、长方体等。示例性的，在图3中，壳体21为长方体结构。
电芯22是电池单体20中发生电化学反应的部件。电芯22包括主体部221和极耳222，极耳222凸出于主体部221的一端，极耳222分为正极极耳222a和负极极耳222b。电芯22可以是一个电极组件，也可以是多个电极组件共同构成。电极组件可以包括正极极片、负极极片和隔离 膜，电极组件可以是由正极极片、隔离膜和负极极片通过卷绕形成的卷绕式结构，也可以是由正极极片、隔离膜和负极极片通过层叠布置形成的层叠式结构。
正极极片可以包括正极集流体和涂覆于正极集流体相对的两侧的正极活性物质层。负极极片可以包括负极集流体和涂覆于负极集流体相对的两侧的负极活性物质层。电极组件包括本体部分、正子极耳和负子极耳，本体部分为电极组件与极片涂覆有活性物质层的区域对应的部分，正子极耳可以是正极极片上未涂覆正极活性物质层的部分，负子极耳可以是负极极片上未涂覆负极活性物质层的部分。
若电芯22只包括一个电极组件，电极组件的本体部分即为电芯22的主体部221，电极组件的正子极耳即为电芯22的正极极耳222a，电极组件的负子极耳即为电芯22的负极极耳222b。若电芯22包括多个电极组件，电芯22的主体部221可以由所有电极组件的本体部分共同构成，电芯22的正极极耳222a也可以由多个电极组件的正子极耳共同构成，电芯22的负极极耳222b可以由多个电极组件的负子极耳共同构成。当然，电芯22的正极极耳222a和负极极耳222b可以是一个，也可以是多个。示例性的，在图3中，电芯22的正极极耳222a和负极极耳222b均为两个，一部分电极组件的正子极耳层叠并弯折形成一个正极极耳222a，一部分电极组件的负子极耳层叠并弯折形成一个负极极耳222b，另一部分电极组件的正子极耳层叠并弯折形成另一个正极极耳222a，另一部分电极组件的负子极耳层叠并弯折形成另一个负极极耳222b。
端盖组件23包括端盖231，端盖231是盖合于壳体21的开口以将电池单体20的内部环境与外部环境隔绝的部件。端盖231盖合于壳体21的开口，端盖231与壳体21共同限定出用于容纳电芯22、电解液以及其他部件的密封空间。端盖231的形状可以与壳体21的形状相适配，比如，壳体21为长方体结构，端盖231为与壳体21相适配的矩形板状结构，再如，壳体21为圆柱体结构，端盖231为与壳体21相适配的圆形板状结构。端盖231的材质也可以是多种，比如，铜、铁、铝、钢、铝合金等，端盖231的材质与壳体21的材质可以相同，也可以不同。
端盖组件23还可以包括绝缘件232，绝缘件232是分隔端盖231和电芯22的部件，以将端盖231和电芯22绝缘隔离。绝缘件232为绝缘材质，比如，橡胶、塑料等。
端盖组件23还可以包括电极端子233，电极端子233安装于端盖231上，电极端子233用于与电极组件的极耳222电连接，以输出电池单体20的电能。电极端子233可以包括正极电极端子233a和负极电极端子233b，正极电极端子233a用于与正极极耳222a电连接，负极电极端子233b用于与负极极耳222b电连接。
集流构件24是实现端盖组件23与极耳222电连接的部件。集流构件24可以连接在电极端子233和极耳222之间，以实现端盖组件23与极耳222的电连接。当然，正极电极端子233a可以通过一个集流构件24与正极极耳222a连接，负极电极端子233b可以通过另一个集流构件24与负极极耳222b连接。
请继续参照图3，在一些实施例中，电池单体20还可以包括泄压机构25，泄压机构25用于在电池单体20内部压力或温度达到阈值时致动，以泄放电池单体20内部压力。
“致动”是指泄压机构25产生动作或被激活至一定的状态，从而使得电池单体20的内部压力及温度得以被泄放。泄压机构25产生的动作可以包括但不限于：泄压机构25中的至少一部分破裂、破碎、被撕裂或者打开，等等。泄压机构25在致动时，电池单体20的内部的高温高压物质作为排放物会从致动的部位向外排出。以此方式能够在可控压力或温度的情况下使电池单体20发生泄压及泄温，从而避免潜在的更严重的事故发生。电池单体20的排放物包括但不限于：电解液、被溶解或分裂的正负极极片、隔离膜的碎片、反应产生的高温高压气体、火焰，等等。
泄压机构25可以是安装于端盖231上的独立部件，比如，泄压机构25可以是安装于端盖231上的防爆阀、防爆片、气阀、泄压阀或安全阀等部件。泄压机构25也可以是端盖231上的一部分，比如，端盖231上设有刻痕槽，刻痕槽限定的区域形成泄压机构25。
请参照图4，图4为图3所示的电池单体20的剖视图，本申请实施例提供一种电池单体20，电池单体20包括壳体21、电芯22、端盖组件23和集流构件24。电芯22包括主体部221和极耳222，极耳222凸出于主体部221在第一方向Z上的一端。壳体21具有开口，壳体21用于容 纳电芯22。端盖组件23用于盖合于开口。在第一方向Z上，集流构件24位于主体部221面向端盖组件23的一侧，集流构件24用于连接极耳222和端盖组件23。其中，极耳222包括用于与集流构件24连接的第一连接部2221，在第一方向Z上，第一连接部2221被配置为位于集流构件24面向端盖组件23的一侧。
集流构件24是实现端盖组件23与极耳222电连接的部件。可以是只有正极极耳222a通过集流构件24与端盖组件23连接，也可以是只有负极极耳222b通过集流构件24与端盖组件23连接。比如，正极极耳222a和负极极耳222b分别位于主体部221在第一方向Z上的两端，正极极耳222a通过集流构件24与端盖组件23连接，负极极耳222b与壳体21连接。当然，也可以是正极极耳222a和负极极耳222b各自通过一个集流构件24与一个端盖组件23连接，比如，正极极耳222a和负极极耳222b均位于主体部221在第一方向Z上的同一端，正极极耳222a通过一个集流构件24与一个端盖组件23连接，负极极耳222b通过另一个集流构件24与另一个端盖组件23连接。集流构件24为导体，可以是铜、铁、铝、钢、铝合金等材质。
根据端盖组件23结构的不同，集流构件24可以连接在端盖组件23的不同位置。比如，在端盖组件23仅包括端盖231的实施例中，极耳222则通过集流构件24与端盖231相连；再如，端盖组件23包括端盖231、绝缘件232和电极端子233的实施例中，极耳222则通过集流构件24与电极端子233相连。
第一连接部2221为极耳222与集流构件24相连的部分。第一连接部2221与集流构件24可以直接连接，比如，两者直接焊接；第一连接部2221与集流构件24也可以间接连接，比如，第一连接部2221与集流构件24通过导电胶层间接连接。
在图4中，第一方向Z为端盖组件23的厚度方向。
在本申请实施例中，由于极耳222与集流构件24连接的第一连接部2221位于集流构件24面向端盖组件23的一侧，充分利用了集流构件24与端盖组件23之间的空间，减小了极耳222占用壳体21内部的空间，能够为电极组件的主体部221腾出更多的空间，有利于提高电池单体20的能量密度。
在一些实施例中，集流构件24设置有翻折部241，翻折部241可翻折地设置于集流构件24在第一方向Z上面向端盖组件23的一侧，翻折部241用于连接第一连接部2221。
翻折部241为能够相对集流构件24翻折并与第一连接部2221连接的部分。集流构件24设置翻折部241与第一连接部2221连接，使得集流构件24与第一连接部2221通过翻折部241间接连接，以实现第一连接部2221与集流构件24的电连接。可理解的，翻折部241为导体，翻折部241可以是铜、铁、铝、钢、铝合金等材质。
翻折部241与集流构件24可以是一体成型结构，翻折部241与集流构件24之间可以形成折痕，翻折部241能够以该折痕为转轴翻折。翻折部241与集流构件24也可以是分体分型后再连接在一起的结构，比如，翻折部241与集流构件24两者焊接在一起。翻折部241与第一连接部2221也可以通过多种方式连接，比如，焊接、通过导电胶层粘接等。
集流构件24上设置有能够翻折的翻折部241，在翻折部241翻折前可以将第一连接部2221与翻折部241连接在一起，比如焊接、通过导电胶层粘接等，更为方便地实现第一连接部2221与集流构件24的电连接。在将第一连接部2221连接于翻折部241后，可以使翻折部241相对集流构件24翻折，自然地将第一连接部2221布置于集流构件24面向端盖组件23的一侧，改善对极耳222的整形效果。
在一些实施例中，请继续参照图4，在第一方向Z上，第一连接部2221与翻折部241层叠设置，且第一连接部2221位于翻折部241面向端盖组件23的一侧。
第一连接部2221与翻折部241层叠设置是指第一连接部2221与翻折部241两者彼此接触并层叠在一起。第一连接部2221和翻折部241两者均可以呈薄片结构。当然，翻折部241与集流构件24两者也可以在第一方向Z层叠设置，以消除翻折部241与集流构件24之间的间隙。
在本实施例中，第一连接部2221与翻折部241在第一方向Z上层叠设置，第一连接部 2221位于翻折部241面向端盖组件23的一侧，这种结构一方面保证第一连接部2221与翻折部241两者之间具有较大的过流面积，另一方面使得第一连接部2221和翻折部241整体紧凑，降低第一连接部2221和翻折部241整体的厚度，降低因第一连接部2221和翻折部241整体过厚使集流构件24距离端盖组件23增大，而造成壳体21内部用于容纳主体部221的空间减小的风险。
在其他实施例中，第一连接部2221也可以包覆在翻折部241的外侧，使得第一连接部2221的一部分位于翻折部241面向端盖组件23的一侧，第一连接部2221的另一部分位于翻折部241与集流构件24之间，以增大第一连接部2221与翻折部241的接触面积。
在一些实施例中，请继续参照图4，翻折部241可翻折地连接于集流构件24的边缘位置。
集流构件24的边缘位置是指集流构件24外轮廓的边缘位置。示例性的，翻折部241可翻折地连接于集流构件24在第二方向X上的一端的边缘位置，第二方向X垂直于第一方向Z。在图4中，第二方向X为端盖组件23的宽度方向。
翻折部241可翻折地连接于集流构件24的边缘位置，在集流构件24的边缘位置可形成折痕，便于翻折部241翻转，同时位于集流构件24的边缘位置翻折部241对极耳222起到保护作用，降低集流构件24的边缘割伤极耳222的风险。
在一些实施例中，请继续参照图4，集流构件24在第二方向X上相对的两端均连接有翻折部241，第二方向X垂直于第一方向Z。电芯22包括沿第二方向X上间隔设置于主体部221的两个极耳222，两个极耳222的第一连接部2221分别连接于两个翻折部241。
分别与集流构件24的两个翻折部241相连的两个极耳222为极性相同的极耳222，比如，两个极耳222可以均为正极极耳222a，也可以均为负极极耳222b。以两个极耳222均为正极极耳222a为例，电芯22可以包括多个电极组件，多个电极组件沿第二方向X排布，多个电极组件中的一部分电极组件中的正子极耳共同构成一个正极极耳222a，多个电极组件中的另一部分电极组件中的正子极耳共同构成另一个正极极耳222a。
电芯22的两个极耳222的第一连接部2221分别连接于集流构件24上的两个翻转部，能够提高集流构件24在壳体21内的稳定性，降低集流构件24在壳体21内晃动的风险。
在一些实施例中，翻折部241与集流构件24为一体成型结构。翻折部241与集流构件24成型方式简单，保证两者之间的牢固性。
在一些实施例中，请参照图4，极耳222绕着集流构件24弯折。极耳222还包括第二连接部2222，第二连接部2222用于连接主体部221和第一连接部2221，在第一方向Z上，第二连接部2222位于集流构件24面向主体部221的一侧。
第二连接部2222为极耳222连接于主体部221和第一连接部2221之间的部分。极耳222绕着集流构件24弯折，即极耳222有一部分位于集流构件24面向端盖组件23的一侧，还有一部分位于集流构件24面向主体部221的一侧，比如，极耳222的第一连接部2221位于集流构件24面向端盖组件23的一侧，极耳222的第二连接部2222位于集流构件24面向主体部221的一侧。
在集流构件24设有翻折部241，第一连接部2221连接于翻折部241的实施例中，极耳222绕着集流构件24和翻折部241整体弯折，使得集流构件24和翻折部241在第一方向Z上位于第一连接部2221和第二连接部2222之间，使得第一连接部2221位于翻折部241面向端盖组件23的一侧，第二连接部2222位于集流构件24面向主体部221的一侧。在实际组装过程中，第一连接部2221连接于翻折部241后，通过翻折翻折部241则可使极耳222绕着集流构件24和翻折部241整体弯折，使得第一连接部2221和第二连接部2222连接位置圆弧过渡。
对于一般的电池单体20而言，极耳222与集流构件24相连的第一连接部2221位于集流构件24面向主体部221的一侧。若电池单体20处于振动环境下，电芯22的主体部221可能会在壳体21内上下窜动，在主体部221与集流构件24的共同挤压下，容易出现极耳222插入主体部221内的情况，导致极耳222破坏隔离膜，出现正负极短路的风险。
然而，在本实施例中，由于极耳222绕着集流构件24弯折，使得集流构件24对极耳222起到很好的限位作用，降低极耳222插入主体部221内的风险。
在一些实施例中，请参照图5，图5为图3所示的电池单体20的局部剖视图，端盖组件23包括端盖231、绝缘件232和电极端子233。端盖231用于盖合于壳体21(图4中示出)的开口。电极端子233设置于端盖231，电极端子233用于与集流构件24电连接。绝缘件232设置于端盖231在第一方向Z上面向主体部221的一侧，绝缘件232用于分隔端盖231和电芯22。集流构件24包括用于与第一连接部2221连接的第一集流部242，在第一方向Z上，第一集流部242与绝缘件232之间形成有收容间隙26，收容间隙26用于收容第一连接部2221。
电极端子233是端盖组件23中用于输出电池单体20的电能的部件。端盖231上的电极端子233可以是一个，也可以是两个。以端盖231上的电极端子233为两个为例，两个电极端子233分别为正极电极端子233a和负极电极端子233b，正极电极端子233a通过一个集流构件24与电芯22的正极极耳222a电连接，负极电极端子233b通过另一个集流构件24与电芯22的负极极耳222b电连接。端盖231上的两个电极端子233可以沿第三方向Y间隔排布，第三方向Y、第二方向X(图4中示出)和第一方向Z三者两两垂直。在图5中，第三方向Y为端盖组件23的长度方向。
第一集流部242是集流构件24与第一连接部2221连接的部分。在集流构件24设置有翻折部241的实施例中，翻折部241设置于第一集流部242，第一连接部2221与翻折部241通过第一集流部242间接连接，翻折部241收容于收容间隙26内，在第一方向Z上，翻折部241位于第一集流部242背离主体部221的一侧，第一连接部2221位于第一集流部242面向端盖组件23的一侧。
由于集流构件24的第一集流部242与绝缘件232之间形成收容间隙26，第一连接部2221收容于收容间隙26内，从而有效利用了第一集流部242与绝缘件232之间的空间，减小了极耳222占用壳体21内部的空间，能够为电极组件的主体部221腾出更多的空间，有利于提高电池单体20的能量密度。
需要说明的是，在本申请实施例中，端盖组件23的长度方向即为端盖231的长度方向，端盖组件23的宽度方向即为端盖231的宽度方向，端盖组件23的厚度方向即为端盖231的厚度方向。
在一些实施例中，绝缘件232具有面向主体部221的内表面2321，绝缘件232设有从内表面2321沿背离主体部221的方向凹陷的第一凹部2322，第一凹部2322用于容纳第一集流部242的至少一部分。在第一方向Z上，第一集流部242与第一凹部2322的底面2322a之间形成收容间隙26。
绝缘件232的内表面2321为绝缘件232面向主体部221的表面，内表面2321可以是平面。第一凹部2322是绝缘件232内用于容纳第一集流部242的凹陷空间，第一凹部2322可以容纳第一集流部242的一部分，也可以容纳第一集流部242的全部。在第一集流部242至少部分收纳于第一凹部2322的情况下，由于第一连接部2221位于第一集流部242面向端盖组件23的一侧，使得第一连接部2221容纳于第一凹部2322内。
第一凹部2322的底面2322a是凹部在第一方向Z上面向主体部221的表面，也是凹部在第一方向Z上距离主体部221最远的表面。收容间隙26是指第一集流部242背离主体部221的表面与第一凹部2322的底面2322a之间形成的区域。
在本实施例中，第一集流部242的至少一部分容纳于第一凹部2322内，减少了第一集流部242占用壳体21内部的空间，以为主体部221腾出更多的空间，有利于提升电池单体20的能量密度。
在一些实施例中，绝缘件232具有背离主体部221的外表面2323，外表面2323与第一凹部2322相对应的位置凸设有第一凸部2324，第一凹部2322从内表面2321沿背离主体部221的方向凹陷至第一凸部2324内。端盖231设有第二凹部，第二凹部用于容纳第一凸部2324的至少一部分。
绝缘件232的外表面2323为绝缘件232背离主体部221的表面，外表面2323可以是平面。外表面2323可以与端盖231相贴，也可以彼此存在距离。第一凸部2324凸出于外表面2323，也可理解为，第一凸部2324从外表面2323向背离主体部221的方向延伸。第一凹部2322从内表面2321沿背离主体部221的方向凹陷至第一凸部2324内，使得第一凹部2322的底面2322a在第一方向Z上相较于绝缘件232的外表面2323更远离于主体部221。
第二凹部是端盖231内用于容纳第一凸部2324的凹陷空间，第二凹部可以容纳第一凸部2324的全部，也可以容纳第一凸部2324的一部分。若绝缘件232的外表面2323与端盖231相贴，则第一凸部2324完全容纳于第二凹部内；若绝缘件232的外表面2323与端盖231存在距离，则第一凸部2324部分容纳于第二凹部内。
在本实施例中，第一凸部2324的至少一部分设置于第二凹部内，能够使得绝缘件232与端盖231两者结构更为紧凑，减少绝缘件232占用壳体21内部的空间。第一凹部2322从内表面2321沿背离主体部221的方向凹陷至第一凸部2324内，增大了第一凹部2322的凹陷深度，使得第一集流部242能够容纳至第一凹部2322的更深位置，以为主体部221腾出更多的空间。
在一些实施例中，结合图5和图6所示，图6为图5所示的集流体的轴测图，集流构件24还包括第二集流部243，第二集流部243连接于第一集流部242，第二集流部243用于与电极端子233电连接。在第一方向Z上，第一集流部242与第二集流部243错位设置，使得集流构件24在第一集流部242面向主体部221的一侧形成容纳空间244，容纳空间244用于容纳极耳222的一部分。
第二集流部243与电极端子233可以直接连接，也可以是间接连接。示例性的，第二集流部243上设有凸台245，凸台245穿过绝缘件232与电极端子233连接。第二集流部243和第一集流部242均可以是片状结构。
在集流构件24于第二方向X相对的两端均连接有翻折部241的实施例中，集流构件24中的第一集流部242可以也对应设置两个，两个第一集流部242均与第二集流部243相连，一个第一集流部242对应设置一个翻折部241。
集流构件24的容纳空间244用于容纳极耳222的一部分，在极耳222包括位于集流构件24面向主体部221的一侧的第二连接部2222的实施例中，容纳空间244用于容纳极耳222的第二连接部2222的至少一部分。
示例性的，请参照图7，图7为图6所示的集流构件24的主视图，集流构件24还包括第三集流部246，第一集流部242、第三集流部246和第二集流部243依次连接形成“Z”形结构，使得第一集流部242与第二集流部243在第一方向Z上错位设置。
由于第一集流部242与第二集流部243在第一方向Z上错位设置，使得集流构件24在第一集流部242面向主体部221的一侧形成容纳极耳222的容纳空间244，使得极耳222能够整体上移，为主体部221腾出更多的空间，有利于提高电池单体20的能量密度。
本申请实施例提供一种电池100，包括箱体10和上述任意一个实施例提供的电池单体20，箱体10用于容纳电池单体20。
本申请实施例提供一种用电设备，包括上述任意一个实施例提供的电池100。
此外，请参照图3和4，本申请实施例提供一种方形电池，其包括壳体21、电芯22、端盖组件23和集流构件24。电芯22包括主体部221、正极极耳222a和负极极耳222b，正极极耳222a和负极极耳222b均凸出于主体部221在第一方向Z上的一端，正极极耳222a通过一个集流构件24与端盖组件23的正极电极端子233a电连接，负极极耳222b通过另一个集流构件24与端盖组件23的负极电极端子233b电连接。正极极耳222a和负极极耳222b均包括第一连接部2221。其中，集流构件24设置有翻折部241，翻折部241与第一连接部2221连接，翻折部241可翻折地设置于集流构件24在第一方向Z上面向端盖组件23的一侧，使得第一连接部2221位于集流构件24面向端盖组件23的一侧。
在这样的方形电池100中，通过翻折部241可方便实现第一连接部2221与集流构件24的 电连接，通过使翻折部241相对集流构件24翻折，则可将第一连接部2221布置于集流构件24面向端盖组件23的一侧，改善对正极极耳222a和负极极耳222b的整形效果，充分利用了集流构件24与端盖组件23之间的空间，减小了正极极耳222a和负极极耳222b占用壳体21内部的空间，能够为电极组件的主体部221腾出更多的空间，有利于提高电池单体20的能量密度。
请参照图8，图8为本申请一些实施例提供的电池单体20的制造方法的流程图，本申请实施例提供一种电池单体20的制造方法，制造方法包括：
S100：提供电芯22，电芯22包括主体部221和极耳222，极耳222凸出于主体部221在第一方向Z上的一端，极耳222包括第一连接部2221；
S200：提供壳体21，壳体21具有开口；
S300：提供端盖组件23；
S400：提供集流构件24；
S500：将集流构件24连接于第一连接部2221和端盖组件23；
S600：将电芯22容纳于壳体21内；
S700：将端盖组件23盖合于开口。
其中，在第一方向Z上，集流构件24位于主体部221面向端盖组件23的一侧，第一连接部2221位于集流构件24面向端盖组件23的一侧。
在上述方法中，并不限制步骤S100、步骤S200、步骤S300和步骤S400的先后顺序，比如，可以先执行步骤S400，再执行步骤S300，再执行步骤S200，再执行步骤S100。
在上述方法中，也并不限制步骤S500和步骤S600的先后顺序，比如，可以先执行步骤S600，再执行步骤S500。
请参照图9，图9为本申请另一些实施例提供的电池单体20的制造方法的流程图，在集流构件24设置有翻折部241的实施例中，步骤S500可以包括：
S510：将第一连接部2221连接于翻折部241；
S520：将翻折部241相对于集流构件24翻折，使得极耳222绕着集流构件24弯折；
S530：将端盖组件23与集流构件24连接，以使第一连接部2221位于集流构件24面向端盖组件23的一侧。
需要说明的是，通过上述各实施例提供的制造方法制造的电池单体20的相关结构，可参见前述各实施例提供的电池单体20，在此不再赘述。
请参照图10，图10为本申请一些实施例提供的电池单体20的制造设备2000的示意性框图，本申请实施例还提供一种电池单体20的制造设备2000，制造设备2000包括第一提供装置2100、第二提供装置2200、第三提供装置2300、第四提供装置2400和组装装置2500。
第一提供装置2100用于提供电芯22，电芯22包括主体部221和极耳222，极耳222凸出于主体部221在第一方向Z上的一端，极耳222包括第一连接部2221。第二提供装置2200用于提供壳体21，壳体21具有开口。第三提供装置2300用于提供端盖组件23。第四提供装置2400用于提供集流构件24。组装装置2500用于将集流构件24连接于第一连接部2221和端盖组件23；组装装置2500还用于将电芯22容纳于壳体21内；组装装置2500还用于将端盖组件23盖合于开口。
其中，在第一方向Z上，集流构件24位于主体部221面向端盖组件23的一侧，第一连接部2221位于集流构件24面向端盖组件23的一侧。
需要说明的是，通过上述实施例提供的制造设备2000制造的电池单体20的相关结构，可参见前述各实施例提供的电池单体20，在此不再赘述。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
以上实施例仅用以说明本申请的技术方案，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。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，均应包含在本申请的保护范围之内。

Claims (16)

  1. 一种电池单体，包括：
    电芯，包括主体部和极耳，所述极耳凸出于所述主体部在第一方向上的一端；
    壳体，具有开口，所述壳体用于容纳所述电芯；
    端盖组件，用于盖合于所述开口；
    集流构件，在第一方向上，所述集流构件位于所述主体部面向所述端盖组件的一侧，所述集流构件用于连接所述极耳和所述端盖组件；
    其中，所述极耳包括用于与所述集流构件连接的第一连接部，在所述第一方向上，所述第一连接部被配置为位于所述集流构件面向所述端盖组件的一侧。
  2. 根据权利要求1所述的电池单体，其中，所述集流构件设置有翻折部，所述翻折部可翻折地设置于所述集流构件在所述第一方向上面向所述端盖组件的一侧，所述翻折部用于连接所述第一连接部。
  3. 根据权利要求2所述的电池单体，其中，在所述第一方向上，所述第一连接部与所述翻折部层叠设置，且所述第一连接部位于所述翻折部面向所述端盖组件的一侧。
  4. 根据权利要求2或3所述的电池单体，其中，所述翻折部可翻折地连接于所述集流构件的边缘位置。
  5. 根据权利要求2-4任一项所述的电池单体，其中，所述集流构件在第二方向上相对的两端均连接有所述翻折部，所述第二方向垂直于所述第一方向；
    所述电芯包括沿所述第二方向上间隔设置于主体部的两个所述极耳，两个所述极耳的第一连接部分别连接于两个所述翻折部。
  6. 根据权利要求2-5任一项所述的电池单体，其中，所述翻折部与所述集流构件为一体成型结构。
  7. 根据权利要求1-6任一项所述的电池单体，其中，所述极耳绕着所述集流构件弯折；
    所述极耳还包括第二连接部，所述第二连接部用于连接所述主体部和所述第一连接部，在所述第一方向上，所述第二连接部位于所述集流构件面向所述主体部的一侧。
  8. 根据权利要求1-7任一项所述的电池单体，其中，所述端盖组件包括：
    端盖，用于盖合于所述开口；
    电极端子，设置于所述端盖，用于与所述集流构件电连接；
    绝缘件，设置于所述端盖在所述第一方向上面向所述主体部的一侧，所述绝缘件用于分隔所述端盖和所述电芯；
    所述集流构件包括用于与所述第一连接部连接的第一集流部，在所述第一方向上，所述第一集流部与所述绝缘件之间形成有收容间隙，所述收容间隙用于收容所述第一连接部。
  9. 根据权利要求8所述的电池单体，其中，所述绝缘件具有面向所述主体部的内表面，所述绝缘件设有从所述内表面沿背离所述主体部的方向凹陷的第一凹部，所述第一凹部用于容纳所述第一集流部的至少一部分；
    在所述第一方向上，所述第一集流部与所述第一凹部的底面之间形成所述收容间隙。
  10. 根据权利要求9所述的电池单体，其中，所述绝缘件具有背离所述主体部的外表面，所述外表面与所述第一凹部相对应的位置凸设有第一凸部，所述第一凹部从所述内表面沿背离所述主体部的方向凹陷至所述第一凸部内；所述端盖设有第二凹部，所述第二凹部用于容纳第一凸部的至少一部分。
  11. 根据权利要求8-10任一项所述的电池单体，其中，所述集流构件还包括第二集流部，所述第二集流部连接于所述第一集流部，所述第二集流部用于与所述电极端子电连接；
    在所述第一方向上，所述第一集流部与所述第二集流部错位设置，使得所述集流构件在所述第一集流部面向所述主体部的一侧形成容纳空间，所述容纳空间用于容纳所述极耳的一部分。
  12. 一种电池，包括：
    如权利要求1-11任一项所述的电池单体；以及
    箱体，用于容纳所述电池单体。
  13. 一种用电设备，包括如权利要求12所述的电池。
  14. 一种电池单体的制造方法，所述制造方法包括：
    提供电芯，所述电芯包括主体部和极耳，所述极耳凸出于所述主体部在第一方向上的一端，所述极耳包括第一连接部；
    提供壳体，所述壳体具有开口；
    提供端盖组件；
    提供集流构件；
    将所述集流构件连接于所述第一连接部和所述端盖组件；
    将所述电芯容纳于所述壳体内；
    将端盖组件盖合于所述开口；
    其中，在所述第一方向上，所述集流构件位于所述主体部面向所述端盖组件的一侧，所述第一连接部位于所述集流构件面向所述端盖组件的一侧。
  15. 根据权利要求14所述的电池单体的制造方法，其中，所述集流构件设置有翻折部；
    所述将所述集流构件连接于所述极耳和所述端盖组件包括：
    将所述第一连接部连接于所述翻折部；
    将所述翻折部相对于所述集流构件翻折，使得所述极耳绕着集流构件弯折；
    将所述端盖组件与所述集流构件连接，以使所述第一连接部位于所述集流构件面向所述端盖组件的一侧。
  16. 一种电池单体的制造设备，所述制造设备包括：
    第一提供装置，用于提供电芯，所述电芯包括主体部和极耳，所述极耳凸出于所述主体部在第一方向上的一端，所述极耳包括第一连接部；
    第二提供装置，用于提供壳体，所述壳体具有开口；
    第三提供装置，用于提供端盖组件；
    第四提供装置，用于提供集流构件；
    组装装置，用于将所述集流构件连接于所述第一连接部和所述端盖组件；还用于将所述电芯容纳于所述壳体内；还用于将端盖组件盖合于所述开口；
    其中，在所述第一方向上，所述集流构件位于所述主体部面向所述端盖组件的一侧，所述第一连接部位于所述集流构件面向所述端盖组件的一侧。
PCT/CN2021/131936 2021-11-19 2021-11-19 电池单体、电池、用电设备及电池单体的制造方法和设备 WO2023087285A1 (zh)

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