WO2023050254A1 - 电池单体、电池、用电设备、电池单体的制造方法和装置 - Google Patents

电池单体、电池、用电设备、电池单体的制造方法和装置 Download PDF

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Publication number
WO2023050254A1
WO2023050254A1 PCT/CN2021/122037 CN2021122037W WO2023050254A1 WO 2023050254 A1 WO2023050254 A1 WO 2023050254A1 CN 2021122037 W CN2021122037 W CN 2021122037W WO 2023050254 A1 WO2023050254 A1 WO 2023050254A1
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WIPO (PCT)
Prior art keywords
main body
body part
electrode sheet
pole
positive
Prior art date
Application number
PCT/CN2021/122037
Other languages
English (en)
French (fr)
Inventor
肖海河
张小文
李白清
金海族
周锡根
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 EP21952113.5A priority Critical patent/EP4184659A1/en
Priority to JP2023509560A priority patent/JP2023546773A/ja
Priority to KR1020237004606A priority patent/KR20230048037A/ko
Priority to PCT/CN2021/122037 priority patent/WO2023050254A1/zh
Priority to CN202180080125.8A priority patent/CN116670892A/zh
Priority to US18/108,660 priority patent/US20230198109A1/en
Publication of WO2023050254A1 publication Critical patent/WO2023050254A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—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
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6553—Terminals or leads
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/474—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • 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.
  • the battery core will generate heat, which will affect the life of the battery.
  • the present application provides a battery cell, a battery, an electrical device, and a manufacturing method and device for the battery cell, which can accelerate the heat dissipation of the battery cell and improve the service life of the battery.
  • the present application provides a battery cell, including:
  • the first main body part is arranged in the casing, and the first main body part includes a first positive electrode sheet and a first negative electrode sheet;
  • the second main body part is arranged in the casing, and the second main body part includes a second positive electrode sheet and a second negative electrode sheet;
  • first main body part and the second main body part are arranged at intervals along the first direction, and one end of the first positive electrode piece along the first direction away from the second main body part protrudes from the first main body part and contacts the first inner surface of the housing , the insulation between the first negative electrode piece and the first inner surface of the housing; and/or, the end of the second positive electrode piece along the first direction away from the first main body portion protrudes from the second main body portion and is connected to the second main body portion of the housing.
  • the inner surfaces are in contact, the second negative plate is insulated from the second inner surface of the housing, and the first inner surface is opposite to the second inner surface.
  • the casing is in direct contact, so the area of the battery cell composed of the first electrode assembly and the second electrode assembly directly contacting the casing can be increased, so that the heat generated inside the battery cell can be dissipated more quickly through direct contact with the casing. Dissipate it, thereby improving the heat dissipation capacity of the battery cell, preventing the heat from accumulating in the shell and causing the battery temperature to be too high, and effectively improving the battery life.
  • the first positive electrode sheet includes a first current collector and a first active material layer formed on the first current collector, and one end of the first current collector that is away from the second main body along the first direction protrudes from the first current collector.
  • the active material layer is in contact with the first inner surface of the casing;
  • the second positive electrode sheet includes a second current collector and a second active material layer formed on the second current collector, and the second current collector is away from the first One end of the main body protrudes from the second active material layer and is in contact with the second inner surface of the case.
  • the first current collector collects the current generated by the first active material layer so as to form a larger current output to the outside.
  • the first current collector is a component that is relatively easy to generate heat. Therefore, the first current collector is selected to protrude in a direction close to the housing relative to the first main body, so that the first current collector is in direct contact with the housing. , can effectively improve the heat transfer efficiency, and is conducive to quickly reducing the temperature of the battery cell.
  • the second current collector collects the current generated by the second active material layer so as to form a larger current for external output.
  • the second current collector is a component that is relatively easy to generate heat. Therefore, the second current collector is selected to protrude in a direction close to the housing relative to the second main body, so that the second current collector is in direct contact with the housing. , can effectively improve the heat transfer efficiency, and is conducive to quickly reducing the temperature of the battery cell.
  • the battery cell further includes a first positive tab and a first negative tab extending from the first main body, and a second positive tab and a second negative tab extending from the second main body, the first positive The tab and the first negative tab are arranged at one end of the first main body portion close to the second main body along the first direction, and the second positive tab and the second negative tab are disposed at one end of the second main body close to the first main body along the first direction. one end.
  • the first positive tab, the first negative tab, the second positive tab, and the second negative tab are all arranged in the space between the first main body and the second main body, which facilitates the realization of increased electrode
  • the purpose of the direct contact area between the component and the shell is to enhance the heat transfer effect between the electrode component and the shell.
  • the distance between the first positive tab and the second positive tab and the distance between the first negative tab and the second negative tab can be shortened to shorten the current transmission path, reduce energy consumption, reduce heat generation, and prevent battery cell If the temperature of the body is too high, it will affect the service life and safety of use.
  • the battery cell further includes a bracket, and the bracket is disposed between the first body part and the second body part, so as to keep the first positive electrode tab in contact with the first inner surface of the casing, and make the second positive electrode The sheet is in contact with the second inner surface of the housing.
  • the bracket by setting the bracket, the first main body part and the second main body part can be supported, the first positive electrode piece can be kept in contact with the first inner surface of the casing, and the second positive electrode piece can be connected to the casing.
  • the second inner surface of the body remains in contact to prevent the first positive electrode piece from being away from the first inner surface of the housing or the second positive electrode piece from the second inner surface of the housing due to its own gravity or external force, thereby affecting the heat transfer efficiency. Reduce the heat dissipation rate, causing the temperature of the battery cell to be too high.
  • the bracket includes a first support portion, a second support portion, and a third support portion connected between the first support portion and the second support portion, and the first support portion is supported by the first main body portion and the first support portion. Between the positive tabs and between the first main body and the first negative tabs, the second support part is supported between the second main body and the second positive tabs and between the second main body and the second negative tabs.
  • the battery cell further includes a first adapter, a second adapter, a positive post and a negative post, the first positive tab and the second positive tab are connected to the first tab, the first post The tab is connected to the positive pole, the first negative tab and the second negative tab are both connected to the second adapter piece, and the second adapter piece is connected to the negative pole.
  • both the first positive tab and the second positive tab are connected to the first adapter piece, and both the first negative tab and the second negative tab are connected to the second adapter piece, so the first electrode assembly and the second electrode assembly
  • the two-electrode assembly realizes a shared adapter, which can reduce the number of components of the battery cell and save costs; at the same time, the shared adapter can also simplify the internal structure of the battery cell, save space, and reduce the cost of the battery cell. volume.
  • the positive pole is installed on the first side of the housing
  • the negative pole is installed on the second side of the housing
  • the first side is opposite to the second side
  • both the first side and the second side are opposite to the first side. direction parallel.
  • the positive pole and the negative pole are respectively arranged on both sides of the housing relative to the first direction, so that the first positive pole and the second positive pole between the first main body and the second main body
  • the ear is connected with the positive pole through lateral extension
  • the first negative pole ear and the second negative pole ear between the first main body part and the second main body are connected with the negative pole through transverse extension, so that the first adapter piece and the The length of the second adapter piece is relatively short, and by shortening the lengths of the first adapter piece and the second adapter piece, circuit loss and heat generation can be reduced.
  • the battery cell further includes a first end cover and a second end cover, the first side of the casing is provided with a first opening, the second side of the casing is provided with a second opening, and the first end cover is provided with a second opening.
  • the second end cap is used to block the first opening and the second end cap is used to block the second opening.
  • the battery cell further includes a first sleeve
  • the positive pole includes a first inner pole and a first outer pole
  • the first sleeve is installed on the first end cap
  • the first outer pole is arranged on the second
  • the outer side of an end cover is connected to the first sleeve
  • the first adapter piece is connected to the first end of the first inner pole
  • the second end of the first inner pole passes through the first sleeve and is connected to the shell
  • the outer side is connected with the first sleeve.
  • the battery cell further includes a second sleeve
  • the negative pole includes a second inner pole and a second outer pole
  • the second sleeve is installed on the second end cap
  • the second outer pole is arranged on the second end cap.
  • the outer side of the two end caps is connected to the second sleeve
  • the second adapter piece is connected to the second end of the second inner pole
  • the second end of the second inner pole passes through the second sleeve and is connected to the housing.
  • the outer side is connected with the second sleeve.
  • the first adapter sheet includes a first connecting portion extending in a direction perpendicular to the first direction, the first connecting portion is connected to the first positive tab and the second positive tab, and the first connecting portion is close to The end of the positive pole is connected to the positive pole; or, the first adapter piece includes a first connecting portion extending in a direction perpendicular to the first direction and a second connecting portion extending in a direction parallel to the first direction, the first The connection part and the second connection part are connected to form an L shape, the first connection part is connected to the first positive pole tab and the second positive pole tab, and the second connection part is connected to the positive pole post.
  • This structure is beneficial to enhance the stability of the electrical connection between the first adapter piece and the positive pole by increasing the contact area between the first adapter piece and the positive pole.
  • the second adapter sheet includes a third connecting portion extending in a direction perpendicular to the first direction, the third connecting portion is connected to the first negative tab and the second negative tab, and the third connecting portion is close to The end of the negative pole is connected to the negative pole; or, the second adapter piece includes a third connection portion extending in a direction perpendicular to the first direction and a fourth connection portion extending in a direction parallel to the first direction, and the third connection portion extends in a direction parallel to the first direction.
  • the connection part and the fourth connection part are connected to form an L shape, the third connection part is connected to the first negative pole tab and the second negative pole tab, and the fourth connection part is connected to the negative pole post.
  • the battery cell further includes a first insulator disposed in the case, and the first insulator is used for electrically isolating the negative pole and the case.
  • the first main body part further includes a first separator, the first main body part is formed by co-winding the first positive electrode sheet, the first negative electrode sheet and the first separator, and the first direction and the winding of the first main body part
  • the center lines are parallel; and/or, the second main body part also includes a second diaphragm, the second main body part is formed by winding the second positive electrode sheet, the second negative electrode sheet and the second diaphragm, and the first direction is the same as that of the second main body part Coil centerline parallel.
  • the shell is made of metal material.
  • a metal-to-metal direct contact structure can be formed between the first positive electrode sheet and the casing and between the second positive electrode sheet and the casing, effectively improving heat dissipation efficiency and reducing the temperature of the battery cell.
  • the present application provides a battery, including the battery cell described above.
  • the present application provides an electric device, including the above-mentioned battery, and the battery is used to supply electric energy to the electric device.
  • the present application provides a method for manufacturing a battery cell, including:
  • the first main body portion includes a first positive electrode sheet and a first negative electrode sheet
  • the second main body portion includes a second positive electrode sheet and a second negative electrode sheet
  • Both the first body part and the second body part are arranged in the casing;
  • the first main body part and the second main body part are arranged at intervals along the first direction, the end of the first positive electrode sheet away from the second main body part along the first direction is in contact with the first inner surface of the casing, and the end of the first negative electrode sheet along the first direction is in contact with the first inner surface of the casing. Insulation between one end away from the second main body part in one direction and the first inner surface of the housing; and/or, one end of the second positive electrode sheet away from the first main body along the first direction is in contact with the second inner surface of the housing
  • the end of the second negative electrode sheet along the first direction away from the first main body is insulated from the second inner surface of the casing, and the first inner surface is opposite to the second inner surface.
  • the present application provides a battery cell manufacturing device, including:
  • the first body portion including a first positive electrode sheet and a first negative electrode sheet
  • the second body portion including a second positive electrode sheet and a second negative electrode sheet
  • the placing device is configured to arrange both the first main body part and the second main body part in the housing, arrange the first main body part and the second main body part at intervals along the first direction, and the first positive electrode sheet is far away from the second main body part along the first direction.
  • One end of the two main body parts is in contact with the first inner surface of the casing, and the end of the first negative electrode piece along the first direction away from the second main body part is insulated from the first inner surface of the casing; and/or, the second positive electrode
  • One end of the sheet away from the first main body along the first direction is in contact with the second inner surface of the case, and the end of the second negative electrode sheet away from the first main body along the first direction is insulated from the second inner surface of the case , the first inner surface is opposite to the second inner surface.
  • Both the battery and the electrical equipment provided in the present application include the battery cells provided in the embodiments of the application, so both the battery and the electrical equipment have the advantages of fast heat dissipation and low temperature, which is beneficial to improve safety performance and prolong service life.
  • the method for manufacturing a battery cell and the device for manufacturing a battery cell provided in the present application also have the above-mentioned advantages, and will not be repeated here.
  • Fig. 1 is a schematic structural diagram of electrical equipment disclosed in some embodiments of the present application.
  • Fig. 2 is a schematic structural diagram of a battery disclosed in some embodiments of the present application.
  • Fig. 3 is a perspective view of a battery cell disclosed in some embodiments of the present application.
  • Fig. 4 is a front view of a battery cell disclosed in some embodiments of the present application.
  • Fig. 5 is a top view of a battery cell disclosed in some embodiments of the present application.
  • Fig. 6 is a left side view of a battery cell disclosed in some embodiments of the present application.
  • Fig. 7 is a cross-sectional view along section A-A in Fig. 4 in some embodiments of the present application.
  • Fig. 8 is an enlarged view of the part labeled P1 in Fig. 7 of some embodiments of the present application.
  • Fig. 9 is an enlarged view of the part labeled P2 in Fig. 7 of some embodiments of the present application.
  • Fig. 10 is an enlarged view of the part labeled P3 in Fig. 7 of some embodiments of the present application.
  • Fig. 11 is a cross-sectional view along section B-B in Fig. 4 in some embodiments of the present application.
  • Fig. 12 is a front view of a bracket in a battery cell disclosed in some embodiments of the present application.
  • Fig. 13 is a top view of a bracket in a battery cell disclosed in some embodiments of the present application.
  • Fig. 14 is a left view of the bracket in the battery cell disclosed in some embodiments of the present application.
  • Fig. 15 is a cross-sectional view along section C-C in Fig. 5 in some embodiments of the present application.
  • Fig. 16 is an enlarged view of the part labeled P4 in Fig. 15 of some embodiments of the present application.
  • Fig. 17 is a schematic diagram of the connection structure of the negative pole and the second adapter piece in some embodiments of the present application.
  • Fig. 18 is a cross-sectional view along section C-C in Fig. 5 in some other embodiments of the present application.
  • Fig. 19 is an enlarged view of the part labeled P5 in Fig. 18 of some embodiments of the present application.
  • Fig. 20 is a schematic diagram of the connection structure of the negative pole and the second adapter piece in other embodiments of the present application.
  • Bracket 41. First supporting part; 42. Second supporting part; 43. Third supporting part; 5. First adapter piece; 51. First connecting part; 52. Second connecting part ; 6, the second adapter piece; 61, the third connecting part; 62, the fourth connecting part; 7a, the first sleeve; 7, the positive pole; 71, the first inner pole; 72, the first outer pole ; 8a, the second sleeve; 8, the negative pole; 81, the second inner pole; 82, the second outer pole; 9, the first insulating member; 10, the second insulating member.
  • the term “plurality” refers to two or more, unless otherwise specifically defined. Similarly, “multiple groups” refers to more than two groups, and “multiple pieces” refers to more than two pieces, unless otherwise specifically defined.
  • Power batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields . With the continuous expansion of power battery application fields, its market demand is also constantly expanding.
  • the inventors of the present application have noticed that during the charging and discharging process of the battery, some heat will be generated inside the battery. When the heat accumulates a lot, the water in the electrolyte will evaporate and gradually dry up, and then the charging efficiency will be reduced and the plates will be deformed. , Increased internal resistance, accelerated oxidation of mechanical parts, burned out plates or separators, and finally manifested as reduced battery capacity and shortened life.
  • a liquid cooling system is installed inside the battery, and the liquid in the liquid cooling system cools and cools the battery.
  • this cooling method needs to arrange a special liquid cooling system inside the battery, and provide space for the liquid cooling system inside the battery, so that the volume of the battery increases. The number of batteries is reduced, so the power provided by the battery system will also be reduced, affecting user experience.
  • the inventor further researched and found that the heat transfer efficiency when two objects are in direct contact is much higher than the heat transfer efficiency when they are not in direct contact, so you can try to improve the heat dissipation capacity of the battery itself by directly contacting the battery cell with the shell Compared with the cooling method of arranging a liquid cooling system inside the battery, it can greatly reduce the volume of the battery. In a limited space, it is beneficial to increase the total number of batteries, thereby increasing the total capacity of the battery system and improving power performance. .
  • the inventor has conducted research on the structure of the current battery cell, and found that, at present, the structure of the battery cell is generally such that the positive pole and the negative pole are arranged on the same piece On the top cover, at the same time, the extension direction of the positive pole and the negative pole is the same as the protruding direction of the battery lug inside the battery cell.
  • This structure limits the connection between the positive and negative poles of the battery cell. Connect on the same side, for example, the positive and negative poles of the battery are connected at the top of the battery, which makes only the bottom of the whole battery contact with the outer shell of the battery, and the heat dissipation capacity of the battery is poor.
  • the inventor believes that the direct contact area between the battery cell and the shell can be increased by changing the structure of the battery cell, thereby helping the battery cell to dissipate heat quickly, effectively reducing the heat accumulated inside the battery cell, and avoiding accelerated aging of the battery cell. Avoid thermal runaway of battery cells caused by heat accumulation in extreme cases, effectively improving battery life.
  • both the top and the bottom of the battery cell can be in direct contact with the casing, thereby effectively improving the heat transfer efficiency, improving the heat dissipation capacity of the battery cell, and preventing heat from accumulating inside the battery cell. affect battery life.
  • the battery cells disclosed in the embodiments of the present application can be used, but not limited, in electrical equipment such as vehicles, ships, or aircrafts.
  • the power supply system comprising the battery cells and batteries disclosed in the present application can be used to form the electrical equipment. In this way, it is beneficial to accelerate the heat dissipation capacity of the battery core, prevent the battery temperature from being too high, and effectively improve the service life of the battery.
  • An embodiment of the present application provides an electric device using a battery as a power source, and the battery is configured to provide electric energy to the electric device.
  • Electrical equipment can be, but not limited to, mobile phones, portable devices, laptops, battery cars, electric vehicles, ships, spacecraft, electric toys and electric tools, etc.
  • spacecraft include airplanes, rockets, space shuttles, spaceships, etc.
  • Electric toys include fixed 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 railways Power tools such as drills, grinders, wrenches, screwdrivers, hammers, impact drills, concrete vibrators, and planers.
  • a vehicle 1000 is used as an example for illustration in some embodiments of the present application.
  • FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle.
  • the interior of the vehicle 1000 is provided with a battery 100 , and the battery 100 may be provided at the bottom, head or tail of 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 also include a controller 200 and a motor 300.
  • the battery 100 is used to provide electric energy for the operation of the motor 300 and other components in the vehicle.
  • the controller 200 is used to control the operation of the motor 300, for example, for the starting, navigation and Working electricity demand while driving.
  • 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 , replacing or partially replacing fuel oil or natural gas to provide driving power for the vehicle 1000 .
  • FIG. 2 is an exploded view of a battery 100 provided by some embodiments of the present application.
  • the battery 100 includes a case 10a and a battery cell 20 accommodated in the case 10a.
  • the casing 10a is used to provide accommodating space for the battery cells 20, and the casing 10a can adopt various structures.
  • the housing 10a may include a first cover 101 and a second cover 102, the first cover 101 and the second cover 102 cover each other, and the first cover 101 and the second cover 102 jointly define An accommodating space for accommodating the battery cells 20 is provided.
  • the second cover 102 can be a hollow structure with an open end, and the first cover 101 can be a plate-shaped structure, and the first cover 101 covers the opening side of the second cover 102, so that the first cover 101 and the The two covers 102 jointly define an accommodating space; the first cover 101 and the second cover 102 can also both be hollow structures with one side opening, and the opening side of the first cover 101 covers the opening of the second cover 102 side.
  • the shell 10a formed by the first cover 101 and the second cover 102 may be in various shapes, such as a cylinder, a cuboid, and the like.
  • the battery 100 there may be multiple battery cells 20 , and 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 connected in series and in parallel.
  • a plurality of battery cells 20 can be directly connected in series, in parallel or mixed together, and then the whole of the plurality of battery cells 20 is housed in the housing 10a; of course, the battery 100 can also be a plurality of battery cells 20 first
  • a battery module is formed by connecting in series, in parallel or in parallel, and a plurality of battery modules are connected in series, in parallel or in combination to form a whole, and accommodated in the housing 10a.
  • the battery 100 may also include other structures, for example, the battery 100 may also include a current flow component for realizing electrical connection between a plurality of battery cells 20 .
  • the battery cell 20 refers to the smallest unit constituting the battery.
  • the battery cell 20 includes a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, which is not limited in the embodiments of the present disclosure.
  • the battery cell can be in the form of a cylinder, a flat body, a cuboid or other shapes, which are not limited in the embodiments of the present disclosure.
  • Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square square battery cells and pouch battery cells, which are not limited in the embodiments of the present disclosure.
  • FIGS. 3 to 6 are respectively a perspective view, a front view, a top view and a left view of the battery cell 20 provided by some embodiments of the present application.
  • the battery cell 20 includes a casing 1 and an electrode assembly, and the electrode assembly is disposed inside the casing 1 .
  • the case 1 is a component for providing an accommodation space for accommodating an electrode assembly, an electrolyte, and other components therein.
  • the housing 1 includes a housing body with an opening and an end cap for closing the opening.
  • the containing body and the end cover may be independent parts, and the containing body is provided with an opening, and the internal environment of the battery cell 20 is formed by making the end cover cover the opening at the opening.
  • the end cap and the containing body can also be integrated. Specifically, the end cap and the containing body can form a common connecting surface before other components are packed into the shell. When the interior of the containing body needs to be sealed, then The end cover is made to cover the containing body, and the containing body and the end cover are packaged into one body.
  • the containing body is a component for matching with the end cap to form the internal environment of the battery cell 20
  • the end cap is a component that covers the opening of the containing body to isolate the internal environment of the battery cell 20 from the external environment.
  • the shape of the end cap can be adapted to the shape of the receiving body to match the receiving body.
  • the end cap can be made of a material with a certain hardness and strength, so that the end cap is not easily deformed when it is squeezed and expanded, so that the battery cell 20 can have higher structural strength, and the safety performance can also be improved. has seen an increase.
  • the end cap may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value.
  • the housing 1 can be in various shapes and sizes, such as cuboid, cylinder, hexagonal prism and so on. Specifically, the shape of the casing 1 can be determined according to the specific shape and size of the electrode assembly.
  • the material of the housing 1 can be selected from metallic materials such as copper, iron, aluminum, stainless steel, aluminum alloy or non-metallic materials such as plastic.
  • the electrode assembly is a part where electrochemical reaction occurs in the battery cell 20 .
  • the electrode assembly includes a first electrode assembly 2 and a second electrode assembly 3, the first electrode assembly 2 includes a first main body part 21, the first main body part 21 is disposed in the casing 1, and the second electrode assembly 2 includes a first main body part 21.
  • a main body part 21 includes a first positive electrode sheet 211 and a first negative electrode sheet 212
  • the second electrode assembly includes a second main body part 31, the second main body part 31 is arranged in the casing 1, and the second main body part 31 includes a second positive electrode sheet 311 and the second negative plate 312.
  • the first body part 21 and the second body part 31 are arranged at intervals along the first direction, and the end of the first positive electrode sheet 211 protruding from the first body part along the first direction away from the second body part 31 21 and in contact with the first inner surface of the casing 1, the first negative electrode sheet 212 is insulated from the first inner surface of the casing 1; and/or, the second positive electrode sheet 311 is away from the first main body along the first direction
  • One end of 21 protrudes from the second main body 31 and is in contact with the second inner surface of the casing 1
  • the second negative electrode sheet 312 is insulated from the second inner surface of the casing 1
  • the first inner surface is opposite to the second inner surface set up.
  • the electrode assembly includes a first body part 21 and a second body part 31 arranged at intervals along a first direction, and the first positive electrode sheet 211 of the first body part 21 is arranged along the first direction.
  • One end away from the second body part 31 protrudes from the first body part 21 and is in direct contact with the first inner surface of the casing 1, and the second positive electrode piece 311 of the second body part 31 is away from the first body along the first direction.
  • One end of the part 21 protrudes from the second main body part 31 and directly contacts the second inner surface of the casing 1, that is, both ends of the electrode assembly can directly contact the casing 1, thereby increasing the size of the first electrode assembly 2 and the second electrode assembly.
  • the area where the entire cell composed of the electrode assembly 3 is in direct contact with the casing 1 enables the heat generated inside the battery cell to be dissipated more quickly through direct contact with the casing 1, thereby improving the heat dissipation capacity of the cell and preventing heat dissipation Accumulation in the casing 1 causes the temperature of the battery to be too high, effectively improving the service life of the battery.
  • the up-down direction indicated by the arrow in FIG. 7 is the first direction
  • the first electrode assembly 2 is disposed above the second electrode assembly 3 .
  • the first electrode assembly 2 includes a first main body portion 21, the length of the first positive electrode sheet 211 in the first main body portion 21 is longer than the length of the first negative electrode sheet 212, and the upper end of the first positive electrode sheet 211 is from The top of the first body part 21 protrudes so that the upper end of the first positive electrode sheet 211 directly contacts the upper inner surface of the casing 1 .
  • the length of the second positive electrode sheet 311 in the second main body part 31 is longer than the length of the second negative electrode sheet 312, and the lower end of the second positive electrode sheet 311 protrudes from the top of the second main body part 31, so that the first The lower ends of the two positive electrode sheets 311 are in direct contact with the bottom inner surface of the casing 1, so the heat transfer efficiency between the first positive electrode sheet 211 and the casing 1 and between the second positive electrode sheet 311 and the casing 1 is relatively high, and can be The heat generated inside the electrode assembly is dissipated in time, thereby reducing the temperature of the battery cell and improving the service life and safety performance of the battery cell.
  • the first positive electrode sheet 211 includes a first current collector 211a and a first active material layer 211b formed on the first current collector 211a, and the first current collector 211a is away from the second main body portion 31 along the first direction.
  • One end protrudes from the first active material layer 211b and is in contact with the first inner surface of the casing 1;
  • the second positive electrode sheet 311 includes a second current collector 311a and a second active material layer 311b formed on the second current collector 311a, An end of the second current collector 311 a away from the first main body portion 21 in the first direction protrudes from the second active material layer 311 b and contacts the second inner surface of the case 1 .
  • the first current collector 211a collects the current generated by the first active material layer 211b so as to form a larger current output to the outside.
  • the first current collector 211a as a carrier for current collection, is a component that is relatively easy to generate heat, so the first current collector 211a is selected to protrude in a direction close to the housing 1 relative to the first main body portion 21, so that the first current collector 211a
  • the direct contact with the housing 1 can effectively improve the heat transfer efficiency, which is beneficial to quickly reduce the temperature of the battery cells 20 .
  • the first current collector 211a usually uses metal foil, such as aluminum foil. When the casing 1 is made of metal material, it can also achieve direct contact between metal and metal, further improving heat transfer efficiency.
  • the second current collector 311a collects the current generated by the second active material layer 311b so as to form a larger current output to the outside.
  • the second current collector 311a as a carrier for current collection, is a component that is relatively easy to generate heat, so the second current collector 311a is selected to protrude in a direction close to the housing 1 relative to the second main body portion 31, so that the second current collector 311a
  • the direct contact with the housing 1 can effectively improve the heat transfer efficiency, which is beneficial to quickly reduce the temperature of the battery cells 20 .
  • the second current collector 311a usually uses metal foil, such as aluminum foil. When the casing 1 is made of metal material, it can also achieve direct contact between metal and metal, further improving heat transfer efficiency.
  • the top of the first current collector 211a is slightly longer than the top of the first active material layer 211b, and the top of the first current collector 211a includes a part that does not wrap the first active material layer 211b, and the end of this part is connected to the shell.
  • the inner surface of body 1 is in direct contact, so that the heat generated by the first current collector 211a in the process of transmitting current is dissipated to the outside of the case 1 through the heat transfer function of the case 1 in time, so as to avoid the temperature of the battery cell 20 from being too high. High, affecting the life and safety of the battery cell 20.
  • the first negative electrode sheet 212 includes a third current collector 212a and a third active material layer 212b formed on the third current collector 212a, and the top of the third current collector 212a may be flush with the third active material layer 212b or the third current collector
  • the top of the current collector 212a is slightly longer than the third active material layer 212b, but both the third current collector 212a and the third active material layer 212b are kept insulated from the casing 1 .
  • the top of the second current collector 311a is slightly longer than the top of the second active material layer 311b, and the top of the second current collector 311a includes a part that does not wrap the second active material layer 311b, and the end of this part is connected to the shell.
  • the inner surface of body 1 is in direct contact, so that the heat generated by the second current collector 311a in the process of transmitting current can be dissipated to the outside of the case 1 through the heat transfer function of the case 1 in time, so as to avoid the temperature of the battery cell 20 from being too high. High, affecting the life and safety of the battery cell 20.
  • the second negative electrode sheet 312 includes a fourth current collector 312a and a fourth active material layer 312b formed on the fourth current collector 312a, and the top of the fourth current collector 312a may be flush with the fourth active material layer 312b or the fourth current collector
  • the top of 312a is slightly longer than the fourth active material layer 312b, but both the fourth current collector 312a and the fourth active material layer 312b are kept insulated from the casing 1 .
  • first preset distance between the end of the first negative electrode sheet 212 that is away from the second main body portion 31 along the first direction and the first inner surface of the housing 1 , and the second negative electrode sheet 312 along the first direction
  • second predetermined distance between one end away from the first main body portion 21 in one direction and the second inner surface of the housing 1 .
  • the first negative electrode sheet 212 is electrically connected, or the second positive electrode sheet 311 is electrically connected to the second negative electrode sheet 312 due to the contact between the second positive electrode sheet 311 and the casing 1, resulting in a short circuit, thereby reducing the safety of the battery cell 20 It may also lead to functional failure of the battery.
  • first negative electrode sheet 212 and the casing 1 in order to maintain insulation between the first negative electrode sheet 212 and the casing 1 and between the second negative electrode sheet 312 and the casing 1, other insulation methods can also be used, such as between the first negative electrode sheet 212 and the casing 1.
  • An insulator is provided between the casing 1 to electrically isolate the first negative electrode sheet 212 from the casing 1; or, an insulator is provided between the second negative electrode sheet 312 and the casing 1 to electrically isolate the second negative electrode sheet 312 from the casing.
  • Body 1 is provided between the casing 1 to electrically isolate the first negative electrode sheet 212 from the casing 1; or, an insulator is provided between the second negative electrode sheet 312 and the casing 1 to electrically isolate the second negative electrode sheet 312 from the casing.
  • the first electrode assembly 2 further includes a first positive tab 22 and a first negative tab 23 extending from the first body part 21, and the second electrode assembly 3 further includes a first tab extending from the second body part 31.
  • the second positive tab 32 and the second negative tab 33, the first positive tab 22 is connected to the first positive tab 211, the first negative tab 23 is connected to the first negative tab 212, and the second positive tab 32 is connected to the second positive tab 311 , the second negative tab 33 is connected to the second negative tab 312, the first positive tab 22 and the first negative tab 23 are arranged at one end of the first main body portion 21 close to the second main body portion 31 along the first direction, and the second positive tab 32 and the second negative tab 33 are disposed on one end of the second body part 31 that is close to the first body part 21 along the first direction.
  • the first positive tab 22 , the first negative tab 23 , the second positive tab 32 and the second negative tab 33 are all located between the first body part 21 and the second body part 31 , so that the first Both the positive tab 22 and the first negative tab 23 are arranged on the end of the first main body 21 away from the casing 1 along the first direction, so as to prevent the first positive tab from being affected due to the existence of the first positive tab 22 and the first negative tab 23.
  • the first positive pole tab 22, the first negative pole tab 23, the second positive pole tab 32 and the second negative pole tab 33 are all arranged in the space between the first main body part 21 and the second main body part 31, which is beneficial to realize the increase of electrode
  • the purpose of the direct contact area between the assembly and the casing 1 is to enhance the heat transfer effect between the electrode assembly and the casing 1 .
  • the distance between the first positive tab 22 and the second positive tab 32 and the distance between the first negative tab 23 and the second negative tab 33 can also be shortened to shorten the current transmission path, reduce energy consumption, and reduce heat generation , preventing the temperature of the battery cell 20 from being too high and affecting the service life and safety of use.
  • the first positive tab 22 and the first negative tab 23 extend downward from the bottom of the first body part 21, respectively, and the second positive tab 32 and the second negative tab 33 respectively extend from the second body.
  • the top of the part 31 extends upwards, and the first positive tab 22, the first negative tab 23, the second positive tab 32 and the second negative tab 33 are all located in the gap between the first main body part 21 and the second main body part 31,
  • Such arrangement can realize the direct contact between the first positive electrode sheet 211 and the casing 1 and the second positive electrode sheet 311 and the casing 1 at the top of the first main body part 21 and the bottom of the second main body part 31, thereby enhancing the heat exchange effect,
  • the distance between the first positive tab 22 and the second positive tab 32 and the distance between the first negative tab 23 and the second negative tab 33 are relatively short, which is conducive to reducing the generation of heat and fundamentally reducing the battery cell. 20 temperature.
  • one end of part of the first positive tab 211 in the first main body 21 protrudes from the first main body 21 along the first direction and is close to the second main body 31 so as to extend to form the first positive tab 22, the first One end of part of the first negative plate 212 in the main body 21 protrudes from the first main body 21 in the first direction close to the second main body 31 so as to extend to form the first negative tab 23; part of the second main body 31 in the second One end of the positive electrode sheet 311 that is close to the first main body portion 21 protrudes from the second main body portion 31 so as to extend to form the second positive electrode tab 32 along the first direction, and part of the second negative electrode sheet 312 in the second main body portion 31 extends along the first direction.
  • One end close to the first body portion 21 protrudes from the second body portion 31 to extend to form a second negative tab 33 .
  • the first positive tab 22 first extends from the first body part 21 toward the direction close to the second body part 31, and then extends laterally along a direction perpendicular to the first direction, forming a positive electrode tab with an opening.
  • the second positive tab 32 first extends from the second body portion 31 toward the first body portion 21 , and then extends laterally along a direction perpendicular to the first direction, forming a U-shaped structure with an opening.
  • the first negative tab 23 and the second negative tab 33 may be formed in a manner similar to that of the first positive tab 22 and the second positive tab 32 , which will not be described in detail here.
  • the battery cell 20 further includes a bracket 4, and the bracket 4 is disposed between the first body part 21 and the second body part 31, so that the first positive electrode piece 211 is kept on the first inner surface of the casing 1. contact, and keep the second positive electrode sheet 311 in contact with the second inner surface of the casing 1 .
  • the first body part 21 and the second body part 31 can be supported, the first positive electrode sheet 211 is kept in contact with the first inner surface of the housing 1, and the second positive electrode sheet 311 is in contact with the casing.
  • the second inner surface of the body 1 is kept in contact to prevent the first positive electrode sheet 211 from being away from the first inner surface of the casing 1 or the second positive electrode sheet 311 from being away from the second inner surface of the casing 1 due to problems such as its own gravity or external force, thereby Affect the heat transfer efficiency, reduce the heat dissipation rate, and cause the battery cell temperature to be too high.
  • the bracket 4 can support the upper first main body 21 to prevent the second main body from being squeezed due to the gravity of the first main body 21 31, causing crushing damage to the second main body part 31; moreover, by supporting the first main body part 21, the bracket 4 can also prevent the first positive electrode piece 211 in the upper first main body part 21 from being far away from the casing 1 and cannot be connected with the casing 1.
  • the first inner surface of the casing 1 is kept in contact, which affects the heat transfer effect, further reduces the heat dissipation rate of the first electrode assembly 2, causes the temperature of the battery cell 20 to be too high, and affects the service life and safety of the battery cell.
  • the first body part 21 includes a first diaphragm for insulating the first positive electrode sheet 211 and the first negative electrode sheet 212
  • the second body part 31 includes a diaphragm for insulating the second positive electrode sheet 311 and the second electrode sheet.
  • the negative electrode sheet 312 holds an insulating second diaphragm
  • the bracket 4 is supported between the first diaphragm and the second diaphragm. The benefit of such arrangement is to prevent the support 4 from causing crush damage to the first positive electrode sheet 211, the first negative electrode sheet 212, the second positive electrode sheet 311 and the second negative electrode sheet 312, which is beneficial to protect the first positive electrode sheet 211 and the first negative electrode sheet.
  • the sheet 212, the second positive electrode sheet 311 and the second negative electrode sheet 312 improve the life of the electrode sheet.
  • one end of the first diaphragm that is close to the second main body portion 31 along the first direction may protrude from the first main body portion 21, so that the end of the first diaphragm along the first direction
  • One end close to the second main body part 31 is longer than the first positive electrode sheet 211 and the first negative electrode sheet 212, so that the first diaphragm can be in contact with the support 4, and the support of the support 4 to the first diaphragm is maintained, thereby protecting the first positive electrode sheet 211 and the first negative electrode sheet 212 are free from extrusion;
  • one end of the second diaphragm close to the first main body portion 21 along the first direction can protrude from the second main body portion 31, so that the second diaphragm is close to the first main body portion 21 along the first direction.
  • One end of the main body 21 is longer than the second positive electrode sheet 311 and the second negative electrode sheet 312, so that the second diaphragm can be in contact with the support 4, and the support of the support 4 to the second diaphragm is maintained, thereby protecting the second positive electrode sheet 311 and the second negative electrode Sheet 312 is free from crushing.
  • one end of part of the first positive electrode sheet 211 that is close to the second main body portion 31 along the first direction needs to protrude from the first main body portion 21, that is, the first positive electrode sheet 211
  • the end close to the second main body part 31 along the first direction is longer than the first negative electrode sheet 212 and the first separator; and in order to form the first negative electrode tab 23, it is necessary to make part of the first negative electrode sheet 212 close to the first negative electrode sheet 212 along the first direction.
  • the second positive electrode sheet 311 in order to form the second positive tab 32, it is necessary to make the end of part of the second positive electrode sheet 311 that is close to the first main body part 21 in the first direction protrude from the second main body part 31, that is, the second positive electrode sheet 311 is longer than the second negative electrode sheet 312 and the first diaphragm along the first direction close to the end of the first main body part 21; and in order to form the second negative electrode tab 33, it is necessary to make part of the second negative electrode sheet 312 close to the first direction.
  • the bracket 4 includes a first support portion 41, a second support portion 42, and a third support portion 43 connected between the first support portion 41 and the second support portion 42, the first support portion 41 is supported on Between the first body part 21 and the first positive tab 22 and between the first body part 21 and the first negative tab 23, the second support part 42 is supported between the second body part 31 and the second positive tab 32 and between the first body part 21 and the first negative tab 23. Between the two main parts 31 and the second negative tab 33 .
  • the advantage of the bracket 4 of this structure is that when the battery cell 20 is in the working state, no matter which one of the first electrode assembly 2 and the second electrode assembly 3 is located above, the first electrode assembly 2 and the second electrode assembly 3 can be aligned. The effective support of the electrode assembly 3 is convenient for installation and operation.
  • the side profile of the bracket 4 is U-shaped, and this structure can support the first electrode assembly 2 and the second electrode assembly 3 through the first support part 41 and the second support part 42 respectively.
  • the first support part 41 can be inserted into the opening formed by bending the first positive tab 22 and the first negative tab 23 respectively, and the second support part 42 can be inserted into the opening formed by bending the second positive tab 32 and the second negative tab 33 respectively.
  • the battery cell 20 further includes a first adapter piece 5, a second adapter piece 6, a positive pole 7 and a negative pole 8, and the first positive pole tab 22 and the second positive pole pole 32 are connected to the first pole pole.
  • the connecting piece 5 is connected, the first connecting piece 5 is connected with the positive pole 7 , the first negative pole ear 23 and the second negative pole ear 33 are both connected with the second connecting piece 6 , and the second connecting piece 6 is connected with the negative pole 8 .
  • both the first positive tab 22 and the second positive tab 32 are connected to the first adapter piece 5, and the first negative tab 23 and the second negative tab 33 are both connected to the second adapter piece 6, therefore
  • the first electrode assembly 2 and the second electrode assembly 3 realize a shared adapter piece, which can reduce the number of components of the battery cell 20 and save costs; at the same time, the shared adapter piece can also simplify the structural arrangement inside the battery cell 20 , save space, and reduce the volume of the battery cell 20 .
  • the first positive tab 22 can be arranged opposite to the second positive tab 32
  • the first negative tab 23 can be arranged opposite to the second negative tab 33 , so as to facilitate arrangement with the first positive tab 22 and the second tab.
  • the positive pole 7 is installed on the first side of the housing 1
  • the negative pole 8 is installed on the second side of the housing 1
  • the first side is opposite to the second side
  • the first side and the second side are parallel to the first direction.
  • the positive pole 7 and the negative pole 8 are respectively arranged on both sides of the casing 1 relative to the first direction, so that the first positive pole ear 22 and the second positive pole between the first main body part 21 and the second main body part 31
  • the ear 32 is connected to the positive pole 7 by extending laterally
  • the first negative pole ear 23 and the second negative pole ear 33 located between the first body part 21 and the second body part 31 are connected to the negative pole 8 by extending transversely, so that
  • the lengths of the first adapter piece 5 and the second adapter piece 6 are shortened, and by shortening the lengths of the first adapter piece 5 and the second adapter piece 6, circuit loss and heat generation can be reduced.
  • the battery cell includes a first end cover 1a and a second end cover 1b, a first opening is provided on the first side of the housing 1, a second opening is provided on the second side of the housing 2, and the first The end cap 1a is used to block the first opening, and the second end cap 1b is used to block the second opening.
  • the positive pole 7 is installed on the first end cover 1a, and the negative pole 8 is installed on the second end cover 1b.
  • the positive pole 7 includes a first inner pole 71 and a first outer pole 72, the first sleeve 7a is installed on the first end cap 1a, and the first outer pole
  • the column 72 is arranged on the outside of the first end cover 1a and connected to the first sleeve 7a, the first adapter piece 5 is connected to the first end of the first inner pole 71, and the second end of the first inner pole 71 passes through Pass through the first sleeve 7a and connect with the first sleeve 7a on the outside of the housing 1 .
  • the outer side of the housing 1 Compared with the inner side, the outer side of the housing 1 has a larger operating space, so realizing the fixing and connection of the first inner pole 71 and the first sleeve 7a on the outer side of the housing 1 can make the operation more convenient and is conducive to Improve assembly efficiency.
  • the first adapter piece 5 can be connected to the first end of the first inner pole 71 first, and then the electrode assembly is packed into the inside of the casing 1, and then the first inner pole 71 can be used when packaging the first end cap 1a.
  • the second end of the second end passes through the first sleeve 7a to go out of the housing 1.
  • the first inner pole 71 is connected to the first sleeve 7a on the outside of the housing 1, so that the first The inner pole 71 and the first outer pole 72 are connected together through the first sleeve 7 a to form the positive pole 7 .
  • the first sleeve 7a includes a first sleeve portion and a first limiting portion
  • the first end cap 1a is provided with a first through hole
  • the first sleeve portion is inserted into the first through hole
  • the first limiting portion is connected to the first limiting portion.
  • a set of sleeve parts is connected, and the first limiting part is located on the inner side of the first end cover 1a.
  • the size of the first limiting part is larger than the size of the first through hole, so as to limit the first sleeve part and prevent the first set of The barrel part is separated from the first through hole.
  • the center of the first sleeve 7a is provided with a second through hole penetrating through it.
  • the first inner pole 71 includes a first cylindrical portion and a second limiting portion, the first cylindrical portion is inserted into the second through hole, and the second limiting portion
  • the position part is connected with the first cylinder part, the second limit part is located inside the first sleeve 7a, the size of the second limit part is larger than the size of the second through hole, the second limit part and the first limit part contact to limit the first cylinder part and prevent the first cylinder part from detaching from the second through hole.
  • the first external pole 72 is used for electrical connection with the positive pole of the electrical component.
  • connection method between the negative electrode post 8 and the second end cap 1b may be the same as that between the positive electrode post 7 and the first end cap 1a, or may be different.
  • the second sleeve 8a may or may not be provided between the negative pole 8 and the second end cover 1b.
  • no second sleeve 8a is provided between the negative pole 8 and the second end cap 1b.
  • the negative pole 8 includes a second inner pole 81 and a second outer pole 82, the second outer pole 82 is arranged outside the second end cover 1b, and the first end of the second inner pole 81 is located on the second end cover 1b and connected to the second adapter piece 6, the second end of the second inner pole 81 passes through the second end cover 1b and is connected to the second outer pole 82.
  • a second sleeve 8 a is provided between the negative electrode column 8 and the second end cap 1 b.
  • the negative pole 8 includes a second inner pole 81 and a second outer pole 82, the second sleeve 8a is installed on the second end cover 1b, and the second outer pole 82 is arranged on the outside of the second end cover 1b and connected to the second The sleeve 8a is connected, and the second adapter piece 6 is connected with the second end of the second inner pole 81, and the second end of the second inner pole 81 passes through the second sleeve 8a and connects with the second end of the second inner pole 81 on the outside of the housing 1.
  • the two sleeves 8a are connected.
  • the outer side of the housing 1 Compared with the inner side, the outer side of the housing 1 has a larger operating space, so realizing the fixing and connection of the second inner pole 81 and the second sleeve 8a on the outer side of the housing 1 can make the operation more convenient and is beneficial to Improve assembly efficiency.
  • the second adapter piece 6 can be connected to the first end of the second inner pole 81 first, then the electrode assembly is packed into the inside of the casing 1, and then the second inner pole 81 can be used when packaging the second end cap 1b.
  • the second end of the second end goes out of the housing 1 through the second sleeve 8a.
  • the second inner pole 81 is connected to the second sleeve 8a on the outside of the housing 1, so that the second The inner pole 81 and the second outer pole 82 are connected together through the second sleeve 8 a to form the negative pole 8 .
  • the second sleeve 8a includes a second sleeve portion and a third limiting portion
  • the second end cover 1b is provided with a third through hole
  • the second sleeve portion is inserted into the third through hole
  • the third limiting portion is connected to the third through hole.
  • the two sleeve parts are connected, and the third limiting part is located on the inner side of the second end cover 1b.
  • the size of the third limiting part is larger than the size of the third through hole, so as to limit the second sleeve part and prevent the second sleeve from The cylinder part is separated from the third through hole.
  • the center of the second sleeve 8a is provided with a fourth through hole penetrating through.
  • the second inner pole 81 includes a first cylindrical portion and a fourth limiting portion, the first cylindrical portion is inserted into the fourth through hole, and the fourth limiting portion
  • the position part is connected with the first cylinder part, the fourth limit part is located inside the second sleeve 8a, the size of the fourth limit part is larger than the size of the fourth through hole, the fourth limit part and the third limit part contact to limit the first cylinder part and prevent the first cylinder part from detaching from the fourth through hole.
  • the second outer pole 82 is used for electrical connection with the positive pole of the electric component.
  • the second inner pole 81 and the second The outer pole 82 is installed on the second end cover 1b, the second adapter piece 6 is connected with the first negative pole ear 23 and the second negative pole ear 33, and then the second adapter piece 6 is connected with the second inner pole 81, Connect the first adapter piece 5 with the first positive pole ear 22 and the second positive pole ear 32, then connect the first adapter piece 5 with the first inner pole 71, and then connect the second end cover 1b, the negative pole 8, the second pole Two adapters 6, the electrode assembly, the first adapter 5 and the first inner pole 71 are assembled into the interior of the housing 1, and finally the first outer pole 72 and the first sleeve 7a have been installed.
  • the first end cover 1a is packaged on the second side of the housing 1, so that the second end of the first inner pole 71 passes through the outer side of the housing 1, so that the first inner pole 71 and the first sleeve 7a are in the
  • the outer sides of the housing 1 are connected by welding to complete the assembly.
  • the second sleeve 8a is provided between the negative pole 8 and the second end cap 1b, and the above-mentioned assembly method of the first end cap 1a can be referred to, first Connect the first inner pole 71 to the first adapter piece 5, connect the second inner pole 81 to the second adapter piece 6, and then package the first end cap 1a after the electrode assembly is loaded into the casing 1 After connecting the first inner pole 71 and the second sleeve 7a and after packaging the second end cap 1b, connect the second inner pole 81 and the second sleeve 8a.
  • first adapter piece 5 and the second adapter piece 6 There are many options for the structural forms of the first adapter piece 5 and the second adapter piece 6 .
  • the first adapter piece 5 includes a first connecting portion 51 extending in a direction perpendicular to the first direction, and the first connecting portion 51 is connected to the first positive tab 22 It is connected to the second positive tab 32 , and the end of the first connecting portion 51 close to the positive pole 7 is connected to the positive pole 7 .
  • the first adapter piece 5 includes a first connecting portion 51 extending in a direction perpendicular to the first direction and a second connecting portion 51 extending in a direction parallel to the first direction. 52 , the first connecting portion 51 and the second connecting portion 52 are connected in an L shape, the first connecting portion 51 is connected to the first positive tab 22 and the second positive tab 32 , and the second connecting portion 52 is connected to the positive post 7 .
  • This structure can enhance the connection stability between the first adapter piece 5 and the positive pole 7 by increasing the contact area between the second connecting portion 52 and the positive pole 7 .
  • the second adapter piece 6 includes a third connecting portion 61 extending in a direction perpendicular to the first direction, and the third connecting portion 61 is connected to the first negative tab.
  • 23 is connected to the second negative pole tab 33 , and the end of the third connecting portion 61 close to the negative pole 8 is connected to the negative pole 8 .
  • the second adapter piece 6 includes a third connecting portion 61 extending in a direction perpendicular to the first direction and a fourth connecting portion 61 extending in a direction parallel to the first direction.
  • the third connecting portion 61 and the fourth connecting portion 62 are connected in an L shape
  • the third connecting portion 61 is connected to the first negative tab 23 and the second negative tab 33
  • the fourth connecting portion 62 is connected to the negative column 8 .
  • This structure can enhance the connection stability between the second adapter piece 6 and the negative pole 8 by increasing the contact area between the fourth connecting portion 62 and the negative pole 8 .
  • the battery cell 20 further includes a first insulator 9 disposed in the housing 1 , and the first insulator 9 is used to electrically isolate the negative pole 8 from the housing 1 .
  • the first negative electrode sheet 212 in the first electrode assembly 2 and the casing 1 there is also insulation between the second negative electrode sheet 312 in the second electrode assembly 3 and the casing 1 . Insulation is maintained, but one end of the first positive electrode sheet 211 in the first electrode assembly 2 is in direct contact with the first inner surface of the casing 1, and one end of the second positive electrode sheet 311 in the second electrode assembly 3 is in contact with the first inner surface of the casing 1.
  • the two inner surfaces are in direct contact, and the first positive tab 22 in the first electrode assembly 2 and the second positive tab 32 in the second electrode assembly 3 are all connected to the positive post 7 through the first adapter piece 5, so the setting can Electrically isolating the negative pole 8 and the first insulator 9 of the casing 1 can prevent the negative pole 8 from being electrically connected to the positive pole 7 through the casing 1, thereby causing a short circuit, affecting the safety of the battery cell, and possibly causing the battery Monomer functional failure.
  • the battery cell 20 further includes a second insulator 10 disposed in the housing 1 , and the second insulator 10 is used to electrically isolate the positive pole 7 from the housing 1 .
  • the first positive pole ear 22 in the first electrode assembly 2 and the second positive pole ear 32 in the second electrode assembly 3 are both connected to the positive pole 7 through the first adapter piece 5, that is, the positive pole 7 and the casing 1 through the first adapter piece 5, the first positive pole ear 22 and the first positive pole piece 211 and the first adapter piece 5, the second positive pole ear 32 and the second positive pole piece 311 to realize the electrical connection, so in other implementations
  • the second insulating member 10 may also be omitted.
  • the first body part 21 further includes a first separator, the first body part 21 is formed by co-winding the first positive electrode sheet 211, the first negative electrode sheet 212 and the first separator, and the first direction is aligned with the first body
  • the winding center line of the part 21 is parallel; and/or, the second main body part 31 also includes a second diaphragm, and the second main body part 31 is formed by co-winding the second positive electrode sheet 311, the second negative electrode sheet 312 and the second diaphragm,
  • the first direction is parallel to the winding centerline of the second main body portion 31 .
  • the first body part 21 and the second body part 31 are both winding structures, and when the winding structure is adopted, the first direction is the winding of the first body part 21 and the second body part 31 center line.
  • the first body part 21 and the second body part 31 can also be manufactured by stacking the positive and negative electrode sheets and the diaphragm.
  • the positive and negative electrode sheets can be selected The direction that can protrude from both ends is taken as the first direction.
  • the housing 1 is made of metal materials.
  • the first positive electrode sheet 211 and the second positive electrode sheet 311 are both metal materials, so metal-to-metal direct contact can be realized between the first positive electrode sheet 211 and the casing 1 and between the second positive electrode sheet 311 and the casing 1, Greatly improve heat transfer efficiency and effectively reduce the temperature of battery cells.
  • the present application also provides a battery, including the above-mentioned battery cell.
  • the present application also provides an electric device, including the above-mentioned battery, and the battery is used to supply electric energy to the electric device.
  • the present application also provides a method for manufacturing a battery cell, including:
  • the casing 1, the first body part 21 and the second body part 31 are provided, the first body part 21 includes a first positive electrode sheet 211 and a first negative electrode sheet 212, and the second body part 31 includes a second positive electrode sheet 311 and a second negative electrode sheet 312;
  • the first main body part 21 and the second main body part 31 are arranged at intervals along the first direction, and the end of the first positive electrode piece 211 away from the second main body part 31 along the first direction is in contact with the first inner surface of the casing 1, and the first The end of the negative electrode sheet 212 away from the second main body portion 31 along the first direction is insulated from the first inner surface of the casing 1; and/or, the end of the second positive electrode sheet 311 away from the first main body portion 21 along the first direction One end is in contact with the second inner surface of the casing 1, and one end of the second negative electrode piece 312 away from the first main body portion 21 along the first direction is insulated from the second inner surface of the casing 1, and the first inner surface is insulated from the second inner surface of the second negative electrode sheet 312.
  • the inner surfaces are arranged relative to each other.
  • the present application also provides a battery cell manufacturing device, including a supply device and a placement device, the supply device is configured to provide the casing 1, the first body part 21 and the second body part 31, the first body part 21 includes the first body part 21 A positive electrode sheet 211 and a first negative electrode sheet 212, the second main body portion 31 includes a second positive electrode sheet 311 and a second negative electrode sheet 312; the placement device is configured to place the first main body portion 21 and the second main body portion 31 in the case Inside the body 1, the first main body part 21 and the second main body part 31 are arranged at intervals along the first direction, and the end of the first positive electrode sheet 211 away from the second main body part 31 along the first direction is in contact with the first inner surface of the housing 1 In contact, the first negative electrode sheet 212 is insulated from the first inner surface of the housing 1 along the first direction away from the second main body part 31; and/or, the second positive electrode sheet 311 is away from the first One end of the main body part 21 is in contact with the second inner surface of the housing 1,
  • FIGS. 3 to 6 they are respectively a perspective view, a front view, a top view and a left view of the battery cell 20 .
  • the battery cell 20 includes a casing 1, the casing 1 includes a housing body, a first end cover and a second end cover, the left side of the housing body is provided with a first opening, the right side is provided with a second opening, and the first end cover is used for To close the first opening, the second end cover is used to close the second opening.
  • the negative pole 8 is installed on the first end cover, and the positive pole 7 is installed on the second end cover.
  • the casing 1 is provided with a first electrode assembly 2 and a second electrode assembly 3 , the first direction is the up-down direction, and the first electrode assembly 2 is disposed above the second electrode assembly 3 .
  • the first electrode assembly 2 and the second electrode assembly 3 have the same structure, and are symmetrically arranged up and down about the midline between the first electrode assembly 2 and the second electrode assembly 3 .
  • the first electrode assembly 2 includes a first main body 21 , a first positive tab 22 and a first negative tab 23 extending downward from the first main body 21 .
  • the second electrode assembly 3 includes a second body portion 31 , a second positive tab 32 and a second negative tab 33 extending upward from the second body portion 31 .
  • the first positive tab 22 and the second positive tab 32 are oppositely disposed on a side of the casing 1 close to the second end cap.
  • the first negative tab 23 and the second negative tab 33 are oppositely disposed on a side of the casing 1 close to the first end cap.
  • first positive tab 22 and the second positive tab 32 are respectively connected to the first adapter piece 5 , and the first adapter piece 5 is connected to the positive pole 7 .
  • the first negative tab 23 and the second negative tab 33 are respectively connected to the second adapter piece 6 , and the second adapter piece 6 is connected to the negative pole 8 .
  • the first positive pole tab 22, the first negative pole tab 23, the second positive pole tab 32 and the second negative pole tab 33 are all arranged between the first main body part 21 and the second main body part 31, and the positive pole pole 7 and the negative pole pole 8 are respectively arranged on the The right side and the left side of the casing 1, so that the first adapter piece 5 can extend substantially horizontally to the positive pole 7, and the second adapter piece 6 can extend substantially horizontally to the negative pole 8, thereby effectively shortening the first rotation.
  • the length of the connecting piece 5 and the second connecting piece 6 reduces heat generation and lowers the temperature of the battery cell 20 .
  • first insulating member 9 and a second insulating member 10 inside the housing 1, the first insulating member 9 is used to electrically isolate the negative pole column 8 from the housing 1, and the second insulating member 10 is used to electrically isolate the positive pole pole 7 from the shell Body 1.
  • the second insulator 10 may be omitted.
  • the first insulator 9 and the second insulator 10 can be made of plastic material.
  • a riveting connection can be used between the positive pole 7 and the casing 1 and between the negative pole 8 and the casing 1, and a sealing ring can be provided at the connection.
  • the sealing ring can be made of fluorine rubber.
  • the first body part 21 includes a first positive electrode sheet 211 and a first negative electrode sheet 212
  • the first positive electrode sheet 211 includes a first current collector 211 a and a first active material layer 211 b.
  • the first current collector 211a is longer than the first active material layer 211b, and the first current collector 211a is in close contact with the top inner surface of the casing 1, which can strengthen the contact between the first positive electrode sheet 211 and the casing.
  • the heat transfer between the bodies 1 makes the heat dissipate to the outside of the casing 1 in time, effectively reducing the temperature of the battery cells 20 .
  • the length of the first negative electrode sheet 212 is longer than the length of the first active material layer 211b.
  • the second body part 31 includes a second positive electrode sheet 311 and a second negative electrode sheet 312
  • the second positive electrode sheet 311 includes a second current collector 311 a and a second active material layer 311 b.
  • the second current collector 311a is longer than the second active material layer 311b, and the second current collector 311a is in close contact with the bottom inner surface of the casing 1, which can strengthen the connection between the second positive electrode sheet 311 and the casing.
  • the heat transfer between the bodies 1 makes the heat dissipate to the outside of the casing 1 in time, effectively reducing the temperature of the battery cells 20 .
  • the length of the second negative electrode sheet 312 is longer than the length of the second active material layer 311b.
  • the first positive tab 22 and the first negative tab 23 respectively extend from the first body portion 21 and are bent to form a U-shaped structure with an opening.
  • the second positive tab 32 and the second negative tab 33 respectively extend from the second body portion 31 and are bent to form a U-shaped structure with an opening.
  • the first negative electrode sheet 212 includes a third current collector 212a and a third active material layer 212b. At the position near the negative pole 8 at the bottom of the first body part 21 , the third current collector 212 a is longer than the third active material layer 212 b, and the third current collector 212 a is in contact with the first negative electrode tab 23 . There is a preset distance between the third active material layer 212 b and the first positive electrode sheet 211 and the first negative electrode tab 23 . Also, the length of the first positive electrode sheet 211 is longer than the length of the third active material layer 212b.
  • the second negative electrode sheet 312 includes a fourth current collector 312a and a fourth active material layer 312b. At the top of the second body part 31 near the negative pole 8 , the fourth current collector 312 a is longer than the fourth active material layer 312 b , and the fourth current collector 312 a is in contact with the second negative electrode tab 33 . There is a preset distance between the fourth active material layer 312 b and the second positive electrode sheet 311 and the second negative electrode tab 33 . Also, the length of the second positive electrode sheet 311 is longer than the length of the fourth active material layer 312b.
  • the first current collector 211a is longer than the length of the first active material layer 211b, and the first current collector 211a is in contact with the first positive tab 22 .
  • the length of the first negative electrode sheet 212 is longer than the length of the first active material layer 211b.
  • the second current collector 311 a is longer than the second active material layer 311 b, and the second current collector 311 a is in contact with the second positive electrode tab 32 .
  • the length of the second negative electrode sheet 312 is longer than the length of the second active material layer 311b.
  • a bracket 4 is provided between the first main body part 21 and the second main body part 31, the bracket 4 has a U-shaped structure, and the bracket 4 includes a first support part 41, a second support part 42 and a The third support portion 43 between the first support portion 41 and the second support portion 42, the first support portion 41 and the second support portion 42 are in a planar structure, and the first support portion 41 is inserted into the first positive tab 22 and the second support portion 42 respectively.
  • the second supporting portion 42 is inserted into the openings formed on the second positive tab 32 and the second negative tab 33 respectively.
  • the battery cell includes a first end cover 1a and a second end cover 1b, the first side of the housing 1 is provided with a first opening, the housing 2 The second side is provided with a second opening, the first end cap 1a is used to block the first opening, and the second end cap 1b is used to block the second opening.
  • the positive pole 7 is installed on the first end cover 1a, and the negative pole 8 is installed on the second end cover 1b.
  • the positive pole 7 includes a first inner pole 71 and a first outer pole 72, the first sleeve 7a is installed on the first end cover 1a, and the first outer pole 72 is arranged on the outside of the first end cover 1a and connected to the first The sleeve 7a is connected, the first adapter piece 5 is connected to the first end of the first inner pole 71, and the second end of the first inner pole 71 passes through the first sleeve 7a and is connected to the second end on the outside of the housing 1. A sleeve 7a is connected.
  • the negative pole 8 includes a second inner pole 81 and a second outer pole 82, the second outer pole 82 is arranged outside the second end cover 1b, and the first end of the second inner pole 81 is located on the second end cover 1b and connected to the second adapter piece 6, the second end of the second inner pole 81 passes through the second end cover 1b and is connected to the second outer pole 82.
  • the negative pole 8 includes a second inner pole 81 and a second outer pole 82
  • the second sleeve 8a is installed on the second end cover 1b
  • the second outer pole 82 is arranged on the outside of the second end cover 1b and connected with the second sleeve 8a
  • the second adapter piece 6 is connected with the second end of the second inner pole 81
  • the second end of the second inner pole 81 passes through
  • the second sleeve 8a is connected to the second sleeve 8a on the outside of the housing 1 .
  • both the first adapter piece 5 and the second adapter piece 6 are straight.
  • One end of the first adapter piece 5 is respectively connected to the first positive pole ear 22 and the second positive pole ear 32 , and the other end is connected to the positive pole 7 .
  • One end of the second adapter piece 6 is connected to the first negative pole tab 23 and the second negative pole tab 33 respectively, and the other end is connected to the negative pole post 8 .
  • both the first adapter piece 5 and the second adapter piece 6 are L-shaped.
  • the first connecting portion 51 of the first adapter piece 5 is respectively connected to the first positive tab 22 and the second positive tab 32, and the second connecting portion 52 is connected to the positive pole 7.
  • the contact area can enhance the stability of the electrical connection between the second connecting portion 52 and the positive pole 7 .
  • the third connection portion 61 of the second adapter piece 6 is respectively connected to the first negative pole tab 23 and the second negative pole tab 33, and the fourth connection portion 62 is connected to the negative pole column 8. By increasing the size of the fourth connection portion 62 and the negative pole pole 8 The contact area can enhance the stability of the electrical connection between the fourth connecting portion and the negative pole 8 .

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Abstract

本申请实施例提供一种电池单体、电池、用电设备、电池单体的制造方法和装置，其中，电池单体包括壳体、第一主体部和第二主体部，第一主体部设置于壳体内，第一主体部包括第一正极片和第一负极片，第二主体部设置于壳体内，第二主体部包括第二正极片和第二负极片，第一主体部和第二主体部沿第一方向间隔布置，第一正极片的沿第一方向远离第二主体部的一端突出于第一主体部并与壳体的第一内表面接触，第一负极片与壳体的第一内表面之间绝缘；和/或，第二正极片的沿第一方向远离第一主体部的一端突出于第二主体部并与壳体的第二内表面接触，第二负极片与壳体的第二内表面之间绝缘，第一内表面与第二内表面相对设置。

Description

电池单体、电池、用电设备、电池单体的制造方法和装置 技术领域
本申请涉及电池技术领域，特别是涉及一种电池单体、电池、用电设备、电池单体的制造方法和装置。
背景技术
节能减排是汽车产业可持续发展的关键，电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言，电池技术又是关乎其发展的一项重要因素。
电池在充放电的使用过程中，电芯会产生热量，影响电池的寿命。
发明内容
本申请提供一种电池单体、电池、用电设备、电池单体的制造方法和装置，可以加快电芯的散热，提高电池的使用寿命。
第一方面，本申请提供一种电池单体，包括：
壳体；
第一主体部，设置于壳体内，第一主体部包括第一正极片和第一负极片；和
第二主体部，设置于壳体内，第二主体部包括第二正极片和第二负极片；
其中，第一主体部和第二主体部沿第一方向间隔布置，第一正极片的沿第一方向远离第二主体部的一端突出于第一主体部并与壳体的第一内表面接触，第一负极片与壳体的第一内表面之间绝缘；和/或，第二正极片的沿第一方向远离第一主体部的一端突出于第二主体部并与壳体的第二内表面接触，第二负极片与壳体的第二内表面之间绝缘，第一内表面与第二内表面相对设置。
在本申请实施例中，通过将第一主体部的第一正极片的沿第一方向远离第二主体部的一端突出于第一主体部并与壳体的第一内表面设置为直接接触，第二主体部的第二正极片的沿第一方向远离第一主体部的一端突出于第二主体部并与壳体的第二内表面设置为直接接触，即电极组件的两端均可以与壳体直接接触，因此可以增大第一电极组件和第二电极组件组成的电芯整体与壳体直接接触的面积，使电池单体内部产生的热量更加快速地通过与壳体的直接接触而散发出去，从而提高电芯的散热能力，防止热量在壳体内积聚而使电池温度过高，有效提高电池使用寿命。
在一些实施例中，第一正极片包括第一集流体和形成于第一集流体上的第一活 性物质层，第一集流体的沿第一方向远离第二主体部的一端突出于第一活性物质层并与壳体的第一内表面接触；第二正极片包括第二集流体和形成于第二集流体上的第二活性物质层，第二集流体的沿第一方向远离第一主体部的一端突出于第二活性物质层并与壳体的第二内表面接触。
在该实施例中，第一集流体将第一活性物质层产生的电流汇集起来，以便形成较大的电流对外输出。第一集流体作为电流汇集的载体，是比较容易产生热量的部件，因此选择第一集流体相对于第一主体部向靠近壳体的方向伸出，以便使第一集流体与壳体直接接触，可以有效提高传热效率，有利于快速降低电池单体的温度。
第二集流体将第二活性物质层产生的电流汇集起来，以便形成较大的电流对外输出。第二集流体作为电流汇集的载体，是比较容易产生热量的部件，因此选择第二集流体相对于第二主体部向靠近壳体的方向伸出，以便使第二集流体与壳体直接接触，可以有效提高传热效率，有利于快速降低电池单体的温度。
在一些实施例中，第一负极片的沿第一方向远离第二主体部的一端与壳体的第一内表面之间具有第一预设距离，第二负极片的沿第一方向远离第一主体部的一端与壳体的第二内表面之间具有第二预设距离。这样可以使第一负极片与壳体之间以及第二负极片与壳体之间均保持绝缘，防止由于第一正极片与壳体接触而使第一正极片与第一负极片电导通，或者由于第二正极片与壳体接触而使第二正极片与第二负极片之间电导通，造成电路短路，影响电池单体的安全性。
在一些实施例中，电池单体还包括从第一主体部延伸出的第一正极耳和第一负极耳以及从第二主体部延伸出的第二正极耳和第二负极耳，第一正极耳和第一负极耳设置于第一主体部的沿第一方向靠近第二主体部的一端，第二正极耳和第二负极耳设置于第二主体部的沿第一方向靠近第一主体部的一端。
在上述实施例中，将第一正极耳、第一负极耳、第二正极耳和第二负极耳均设置于位于第一主体部和第二主体部之间的空间内，有利于实现增加电极组件与壳体直接接触面积的目的，增强电极组件与壳体之间的传热效果。而且，还可以缩短第一正极耳和第二正极耳之间的距离以及第一负极耳和第二负极耳之间的距离，缩短电流传输路径，减少能量消耗，降低热量的产生，防止电池单体的温度过高而影响使用寿命和使用安全性。
在一些实施例中，电池单体还包括支架，支架设置于第一主体部和第二主体部之间，以使第一正极片与壳体的第一内表面保持接触，以及使第二正极片与壳体的第二内表面保持接触。
在上述实施例中，通过设置支架，可以对第一主体部和第二主体部起到支撑作用，使第一正极片与壳体的第一内表面保持接触，以及使第二正极片与壳体的第二内表面保持接触，防止由于自身重力或外力等问题造成第一正极片远离壳体的第一内表面或者第二正极片远离壳体的第二内表面，从而影响传热效率，降低散热速度，造成电池单体温度过高。
在一些实施例中，支架包括第一支撑部、第二支撑部以及连接于第一支撑部和第二支撑部之间的第三支撑部，第一支撑部支撑于第一主体部和第一正极耳之间以及 第一主体部和第一负极耳之间，第二支撑部支撑于第二主体部和第二正极耳之间以及第二主体部和第二负极耳之间。这种结构的支架的优势在于，在电池单体处于工作状态时，无论第一电极组件和第二电极组件中的哪个位于上方，均可以实现对第一电极组件和第二电极组件的有效支撑，安装和操作都比较方便。
在一些实施例中，电池单体还包括第一转接片、第二转接片、正极柱和负极柱，第一正极耳和第二正极耳均与第一转接片连接，第一转接片与正极柱连接，第一负极耳和第二负极耳均与第二转接片连接，第二转接片与负极柱连接。
在上述一些实施例中，第一正极耳和第二正极耳均与第一转接片连接，第一负极耳和第二负极耳均与第二转接片连接，因此第一电极组件和第二电极组件实现了共用转接片，可以减少电池单体的组成部件的数量，节约成本；同时，共用转接片也可以简化电池单体内部的结构布置，节省空间，减小电池单体的体积。
在一些实施例中，正极柱安装于壳体的第一侧面，负极柱安装于壳体的第二侧面，第一侧面与第二侧面相对设置，且第一侧面和第二侧面均与第一方向平行。
在该实施例中，将正极柱和负极柱分别设置于壳体的相对于第一方向的两侧，便于使位于第一主体部和第二主体部之间的第一正极耳和第二正极耳通过横向延伸与正极柱连接，以及使位于第一主体部和第二主体部之间的第一负极耳和第二负极耳通过横向延伸与负极柱连接，这样可以使第一转接片和第二转接片的长度较短，通过缩短第一转接片和第二转接片的长度，可以降低电路损失，减少热量的产生。
在一些实施例中，电池单体还包括第一端盖和第二端盖，壳体的第一侧面设有第一开口，壳体的第二侧面设有第二开口，第一端盖用于封堵第一开口，第二端盖用于封堵第二开口。通过设置两个端盖，可以先将电极组件沿着与第一方向垂直的方向装入壳体内，然后再通过两个端盖分别封闭两个开口，提高组装的方便性。
在一些实施例中，电池单体还包括第一套筒，正极柱包括第一内极柱和第一外极柱，第一套筒安装于第一端盖，第一外极柱设置于第一端盖的外侧并与第一套筒连接，第一转接片与第一内极柱的第一端连接，第一内极柱的第二端穿过第一套筒并在壳体的外侧与第一套筒连接。这种结构可以提高电池单体组装的方便性，有利于实现在壳体的外部对第一内极柱和第一套筒进行固定和连接，提高操作的方便性。
在一些实施例中，电池单体还包括第二套筒，负极柱包括第二内极柱和第二外极柱，第二套筒安装于第二端盖，第二外极柱设置于第二端盖的外侧并与第二套筒连接，第二转接片与第二内极柱的第二端连接，第二内极柱的第二端穿过第二套筒并在壳体的外侧与第二套筒连接。这种结构可以提高电池单体组装的方便性，有利于实现在壳体的外部对第二内极柱和第二套筒进行固定和连接，提高操作的方便性。
在一些实施例中，第一转接片包括沿与第一方向垂直的方向延伸的第一连接部，第一连接部与第一正极耳和第二正极耳连接，且第一连接部的靠近正极柱的端部与正极柱连接；或者，第一转接片包括沿与第一方向垂直的方向延伸的第一连接部和沿与第一方向平行的方向延伸的第二连接部，第一连接部和第二连接部连接成L形，第一连接部与第一正极耳和第二正极耳连接，第二连接部与正极柱连接。这种结构有利于通过增大第一转接片与正极柱的接触面积而增强第一转接片与正极柱的电连接稳 定性。
在一些实施例中，第二转接片包括沿与第一方向垂直的方向延伸的第三连接部，第三连接部与第一负极耳和第二负极耳连接，且第三连接部的靠近负极柱的端部与负极柱连接；或者，第二转接片包括沿与第一方向垂直的方向延伸的第三连接部和沿与第一方向平行的方向延伸的第四连接部，第三连接部和第四连接部连接成L形，第三连接部与第一负极耳和第二负极耳连接，第四连接部与负极柱连接。这种结构有利于通过增大第二转接片与负极柱的接触面积而增强第二转接片与负极柱的电连接稳定性。
在一些实施例中，电池单体还包括设置于壳体内的第一绝缘件，第一绝缘件用于电隔离负极柱和壳体。通过设置第一绝缘件，可以降低正负极短路风险，提高电池单体的使用安全性。
在一些实施例中，第一主体部还包括第一隔膜，第一主体部通过第一正极片、第一负极片和第一隔膜共同卷绕形成，第一方向与第一主体部的卷绕中心线平行；和/或，第二主体部还包括第二隔膜，第二主体部通过第二正极片、第二负极片和第二隔膜共同卷绕形成，第一方向与第二主体部的卷绕中心线平行。
在一些实施例中，壳体采用金属材料制成。这样可以使第一正极片和壳体之间以及第二正极片和壳体之间形成金属与金属直接接触的结构，有效提高散热效率，降低电池单体的温度。
第二方面，本申请提供一种电池，包括上述的电池单体。
第三方面，本申请提供一种用电设备，包括上述的电池，电池用于向用电设备供应电能。
第四方面，本申请提供一种电池单体的制造方法，包括：
提供壳体、第一主体部和第二主体部，第一主体部包括第一正极片和第一负极片，第二主体部包括第二正极片和第二负极片；
将第一主体部和第二主体部均设置于壳体内；
将第一主体部和第二主体部沿第一方向间隔布置，第一正极片的沿第一方向远离第二主体部的一端与壳体的第一内表面接触，第一负极片的沿第一方向远离第二主体部的一端与壳体的第一内表面之间绝缘；和/或，第二正极片的沿第一方向远离第一主体部的一端与壳体的第二内表面接触，第二负极片的沿第一方向远离第一主体部的一端与壳体的第二内表面之间绝缘，第一内表面与第二内表面相对设置。
第五方面，本申请提供一种电池单体的制造装置，包括：
提供装置，被配置为提供壳体、第一主体部和第二主体部，第一主体部包括第一正极片和第一负极片，第二主体部包括第二正极片和第二负极片；和
放置装置，被配置为将第一主体部和第二主体部均设置于壳体内，将第一主体部和第二主体部沿第一方向间隔布置，第一正极片的沿第一方向远离第二主体部的一端与壳体的第一内表面接触，第一负极片的沿第一方向远离第二主体部的一端与壳体的第一内表面之间绝缘；和/或，第二正极片的沿第一方向远离第一主体部的一端与壳体的第二内表面接触，第二负极片的沿第一方向远离第一主体部的一端与壳体的第二 内表面之间绝缘，第一内表面与第二内表面相对设置。
本申请提供的电池和用电设备均包括本申请实施例提供的电池单体，因此电池和用电设备均具有散热快和温度低的优势，有利于提高安全性能和延长使用寿命。本申请提供的电池单体的制造方法和电池单体的制造装置同样也具备上述优势，这里不再赘述。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据附图获得其他的附图。
图1是本申请一些实施例公开的用电设备的结构示意图.
图2是本申请一些实施例公开的电池的结构示意图。
图3是本申请一些实施例公开的电池单体的立体图。
图4是本申请一些实施例公开的电池单体的主视图。
图5是本申请一些实施例公开的电池单体的俯视图。
图6是本申请一些实施例公开的电池单体的左视图。
图7是本申请一些实施例中沿图4中A-A截面的剖视图。
图8是本申请一些实施例的图7中标号为P1的部分的放大图。
图9是本申请一些实施例的图7中标号为P2的部分的放大图。
图10是本申请一些实施例的图7中标号为P3的部分的放大图。
图11是本申请一些实施例中沿图4中B-B截面的剖视图。
图12是本申请一些实施例公开的电池单体中支架的主视图。
图13是本申请一些实施例公开的电池单体中支架的俯视图。
图14是本申请一些实施例公开的电池单体中支架的左视图。
图15是本申请一些实施例中沿图5中C-C截面的剖视图。
图16是本申请一些实施例的图15中标号为P4的部分的放大图。
图17是本申请一些实施例中负极柱和第二转接片的连接结构示意图。
图18是本申请另一些实施例中沿图5中C-C截面的剖视图。
图19是本申请一些实施例的图18中标号为P5的部分的放大图。
图20是本申请另一些实施例中负极柱和第二转接片的连接结构示意图。
在附图中，附图并未按照实际的比例绘制。
标记说明：
1000、车辆；100、电池；200、控制器；300、马达；101、第一盖体；102、第二盖 体；10a、外壳；20、电池单体；1、壳体；1a、第一端盖；1b、第二端盖；2、第一电极组件；21、第一主体部；211、第一正极片；211a、第一集流体；211b、第一活性物质层；212、第一负极片；212a、第三集流体；212b、第三活性物质层；22、第一正极耳；23、第一负极耳；3、第二电极组件；31、第二主体部；311、第二正极片；311a、第二集流体；311b、第二活性物质层；312、第二负极片；312a、第四集流体；312b、第四活性物质层；32、第二正极耳；33、第二负极耳；4、支架；41、第一支撑部；42、第二支撑部；43、第三支撑部；5、第一转接片；51、第一连接部；52、第二连接部；6、第二转接片；61、第三连接部；62、第四连接部；7a、第一套筒；7、正极柱；71、第一内极柱；72、第一外极柱；8a、第二套筒；8、负极柱；81、第二内极柱；82、第二外极柱；9、第一绝缘件；10、第二绝缘件。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文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；本文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。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。此外，术语“垂直”并不是严格意义上的垂直，而是在误差允许范围之内。“平行”并不是严格意义上的平行，而是在误差允许范围之内。
在本文中提及“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。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上，除非另有明确具体的限定。同理，“多组”指的是两组以上，“多片”指的是两片以上，除非另有明确具体的限定。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位 或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；也可以是机械连接，也可以是电连接；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或两个元件的相互作用关系。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实施例中的具体含义。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
本申请的发明人注意到，在电池充放电的使用过程中，电池内部会产生一些热量，当这些热量积聚较多时，会使电解液的水分蒸发并逐渐干涸，继而充电效率降低、极板变形、内阻增加、机械部件氧化加速、烧坏极板或隔离物，最后表现为电池容量降低、寿命缩短。
为了克服电池发热带来的一系列不良影响，在相关技术中，会采用一些主动的降温措施。比如，在电池内部设置液冷系统，通过液冷系统中的液体对电池实现冷却和降温作用。但是，这种降温方式需要在电池内部布置专门的液冷系统，还要在电池内部为液冷系统提供布置空间，使得电池的体积增大，在用电设备有限的放置空间内，可存放的电池数量减少，因此电池系统所提供的电能也会有所降低，影响用户体验。
发明人进一步研究发现，两个物体直接接触时的传热效率比非直接接触时的传热效率要高很多，因此可以尝试将电芯与壳体直接接触的方式来提高电芯自身的散热能力，这相比在电池内部布置液冷系统的冷却方式来说，可以大大减小电池的体积，在有限的空间内，有利于增加电池的总数量，从而提高电池系统的总容量，提高动力性能。
为了增大电芯与壳体直接接触的面积大小，发明人对目前电池单体的结构进行了研究，研究发现，目前，电池单体的结构一般是，将正极柱和负极柱设置在同一片顶盖上，同时正极柱和负极柱的延伸方向与电池单体内部的电芯极耳的伸出方向相同，这种结构限制了电芯的正负极之间的连接方式为在电芯的同侧连接，比如电芯的正负极均在电芯的顶部连接，这使得整个电芯只有底部能够与电芯外部的壳体接触，电芯的散热能力较差。
基于以上研究，发明人认为可以通过改变电池单体结构的方式增大电芯与壳体直接接触的面积，进而帮助电芯快速散热，有效降低电芯内部积聚的热量，避免电芯加速老化，避免极端情况下热累积导致电芯热失控，有效提高电池使用寿命。
为此，发明人提供了一种结构改进的电池单体。在本申请提供的电池单体的实 施例中，电芯的顶部和底部均可以与壳体直接接触，从而有效提高传热效率，提高电芯的散热能力，防止热量在电池单体内部积聚，影响电池的寿命。
本申请实施例公开的电池单体可以但不限用于车辆、船舶或飞行器等用电设备中。可以使用具备本申请公开的电池单体、电池等组成该用电设备的电源系统，这样，有利于加快电芯的散热能力，防止电池温度过高，有效提高电池使用寿命。
本申请实施例提供一种使用电池作为电源的用电设备，电池被配置为对用电设备提供电能。用电设备可以为但不限于手机、便携式设备、笔记本电脑、电瓶车、电动汽车、轮船、航天器、电动玩具和电动工具等等，例如，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。
以下实施例为了方便说明，以本申请一些实施例的一种用电设备为车辆1000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可以为燃油汽车、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。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，电池100用于为马达300以及车辆中其它部件的工作提供电能，控制器200用来控制马达300工作，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的爆炸图。电池100包括外壳10a和电池单体20，电池单体20容纳于外壳10a内。其中，外壳10a用于为电池单体20提供容纳空间，外壳10a可以采用多种结构。在一些实施例中，外壳10a可以包括第一盖体101和第二盖体102，第一盖体101与第二盖体102相互盖合，第一盖体101和第二盖体102共同限定出用于容纳电池单体20的容纳空间。第二盖体102可以为一端开口的空心结构，第一盖体101可以为板状结构，第一盖体101盖合于第二盖体102的开口侧，以使第一盖体101与第二盖体102共同限定出容纳空间；第一盖体101和第二盖体102也可以均为一侧开口的空心结构，第一盖体101的开口侧盖合于第二盖体102的开口侧。当然，第一盖体101和第二盖体102形成的外壳10a可以是多种形状，比如，圆柱体、长方体等。
在电池100中，电池单体20可以是多个，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。多个电池单体20之间可直接串联或并联或混联在一起，再将多个电池单体20构成的整体容纳于外壳10a内；当然，电池100也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形式，多个 电池模块再串联或并联或混联形成一个整体，并容纳于外壳10a内。电池100还可以包括其他结构，例如，该电池100还可以包括汇流部件，用于实现多个电池单体20之间的电连接。
其中，电池单体20是指组成电池的最小单元。电池单体20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，本公开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，本公开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、方体方形电池单体和软包电池单体，本公开实施例对此也不限定。
请参照图3至6所示，分别为本申请一些实施例提供的电池单体20的立体图、主视图、俯视图和左视图。在本申请提供的一些实施例中，电池单体20包括壳体1和电极组件，电极组件设置壳体1的内部。
壳体1是用于提供容纳空间以将电极组件、电解液以及其他部件容纳于其内的部件。壳体1包括具有开口的容纳本体和用于封闭开口的端盖。容纳本体和端盖可以是独立的部件，容纳本体上设置有开口，通过在开口处使端盖盖合开口以形成电池单体20的内部环境。不限地，也可以使端盖和容纳本体一体化，具体地，端盖和容纳本体可以在将其他部件装入壳前先形成一个共同的连接面，当需要封装容纳本体的内部时，再使端盖盖合容纳本体，并将容纳本体和端盖封装为一体。
容纳本体是用于配合端盖以形成电池单体20的内部环境的组件，端盖是盖合于容纳本体的开口处以将电池单体20的内部环境隔绝于外部环境的部件。不限地，端盖的形状可以与容纳本体的形状相适应以配合容纳本体。可选地，端盖可以由具有一定硬度和强度的材质制成，这样，端盖在受挤压膨胀时就不易发生形变，使电池单体20能够具备更高的结构强度，安全性能也可以有所提高。
在一些实施例中，端盖上还可以设置有用于在电池单体20的内部压力或温度达到阈值时泄放内部压力的泄压机构。
壳体1可以是多种形状和多种尺寸的，例如长方体形、圆柱体形、六棱柱形等。具体地，壳体1的形状可以根据电极组件的具体形状和尺寸大小来确定。壳体1的材质可以选择铜、铁、铝、不锈钢、铝合金等金属材料或塑胶等非金属材料。
电极组件是电池单体20中发生电化学反应的部件。在本申请提供的一些实施例中，电极组件包括第一电极组件2和第二电极组件3，第一电极组件2包括第一主体部21，第一主体部21设置于壳体1内，第一主体部21包括第一正极片211和第一负极片212，第二电极组件包括第二主体部31，第二主体部31设置于壳体1内，第二主体部31包括第二正极片311和第二负极片312。
参考图7至9所示，第一主体部21和第二主体部31沿第一方向间隔布置，第一正极片211的沿第一方向远离第二主体部31的一端突出于第一主体部21并与壳体1的第一内表面接触，第一负极片212与壳体1的第一内表面之间绝缘；和/或，第二正极片311的沿第一方向远离第一主体部21的一端突出于第二主体部31并与壳体1的第二内表面接触，第二负极片312与壳体1的第二内表面之间绝缘，第一内表面与第二内表面相对设置。
在本申请提供的电池单体的一些实施例中，电极组件包括沿第一方向间隔布置的第一主体部21和第二主体部31，第一主体部21的第一正极片211的沿第一方向远离第二主体部31的一端突出于第一主体部21并与壳体1的第一内表面直接接触，第二主体部31的第二正极片311的沿第一方向远离第一主体部21的一端突出于第二主体部31并与壳体1的第二内表面直接接触，即电极组件的两端均可以与壳体1直接接触，从而增大第一电极组件2和第二电极组件3组成的电芯整体与壳体1直接接触的面积，使电池单体内部产生的热量更加快速地通过与壳体1的直接接触而散发出去，从而提高电芯的散热能力，防止热量在壳体1内积聚而使电池温度过高，有效提高电池使用寿命。
在如图7所示的实施例中，图7中的箭头所指的上下方向为第一方向，第一电极组件2设置于第二电极组件3的上方。如图8所示，第一电极组件2包括第一主体部21，第一主体部21中的第一正极片211的长度比第一负极片212的长度长，第一正极片211的上端从第一主体部21的顶部突出，以使第一正极片211的上端与壳体1的上部内表面直接接触。如图9所示，第二主体部31中的第二正极片311的长度比第二负极片312的长度长，第二正极片311的下端从第二主体部31的顶部突出，以使第二正极片311的下端与壳体1的底部内表面直接接触，因此第一正极片211与壳体1之间以及第二正极片311与壳体1之间的传热效率较高，可以将电极组件内部产生的热量及时散发出去，从而降低电池单体的温度，提高电池单体的使用寿命和安全性能。
在一些实施例中，第一正极片211包括第一集流体211a和形成于第一集流体211a上的第一活性物质层211b，第一集流体211a的沿第一方向远离第二主体部31的一端突出于第一活性物质层211b并与壳体1的第一内表面接触；第二正极片311包括第二集流体311a和形成于第二集流体311a上的第二活性物质层311b，第二集流体311a的沿第一方向远离第一主体部21的一端突出于第二活性物质层311b并与壳体1的第二内表面接触。
第一集流体211a将第一活性物质层211b产生的电流汇集起来，以便形成较大的电流对外输出。第一集流体211a作为电流汇集的载体，是比较容易产生热量的部件，因此选择第一集流体211a相对于第一主体部21向靠近壳体1的方向伸出，以便使第一集流体211a与壳体1直接接触，可以有效提高传热效率，有利于快速降低电池单体20的温度。而且第一集流体211a为了实现导电性能，通常采用金属箔，比如铝箔，在壳体1采用金属材料制造时，还可以实现金属与金属的直接接触，进一步提高传热效率。
第二集流体311a将第二活性物质层311b产生的电流汇集起来，以便形成较大的电流对外输出。第二集流体311a作为电流汇集的载体，是比较容易产生热量的部件，因此选择第二集流体311a相对于第二主体部31向靠近壳体1的方向伸出，以便使第二集流体311a与壳体1直接接触，可以有效提高传热效率，有利于快速降低电池单体20的温度。而且第二集流体311a为了实现导电性能，通常采用金属箔，比如铝箔，在壳体1采用金属材料制造时，还可以实现金属与金属的直接接触，进一步提高传热效率。
如图8所示，第一集流体211a的顶部略长于第一活性物质层211b的顶部，第一集流体211a的顶部包括未包裹第一活性物质层211b的部分，该部分的端部与壳体1的内表面直接接触，以将第一集流体211a在传输电流的过程中产生的热量及时通过壳体1的传热作用而散发到壳体1之外，避免电池单体20的温度过高，影响电池单体20的寿命和使用安全性。第一负极片212包括第三集流体212a和形成于第三集流体212a上的第三活性物质层212b，第三集流体212a的顶部可以与第三活性物质层212b齐平或者第三集流体212a的顶部略长于第三活性物质层212b，但是第三集流体212a和第三活性物质层212b均与壳体1保持绝缘。
如图9所示，第二集流体311a的顶部略长于第二活性物质层311b的顶部，第二集流体311a的顶部包括未包裹第二活性物质层311b的部分，该部分的端部与壳体1的内表面直接接触，以将第二集流体311a在传输电流的过程中产生的热量及时通过壳体1的传热作用而散发到壳体1之外，避免电池单体20的温度过高，影响电池单体20的寿命和使用安全性。第二负极片312包括第四集流体312a和形成于第四集流体312a上的第四活性物质层312b，第四集流体312a的顶部可以与第四活性物质层312b齐平或者第四集流体312a的顶部略长于第四活性物质层312b，但是第四集流体312a和第四活性物质层312b均与壳体1保持绝缘。
在一些实施例中，第一负极片212的沿第一方向远离第二主体部31的一端与壳体1的第一内表面之间具有第一预设距离，第二负极片312的沿第一方向远离第一主体部21的一端与壳体1的第二内表面之间具有第二预设距离。这样可以使第一负极片212与壳体1之间以及第二负极片312与壳体1之间均保持绝缘，防止由于第一正极片211与壳体1接触而使第一正极片211与第一负极片212电导通，或者由于第二正极片311与壳体1接触而使第二正极片311与第二负极片312之间电导通，造成电路短路，进而降低电池单体20的安全性，还有可能导致电池功能性失效。
在其他实施例中，为了使第一负极片212与壳体1之间以及第二负极片312与壳体1之间均保持绝缘，也可以采用其他绝缘方法，比如在第一负极片212与壳体1之间设置绝缘件，以电隔离第一负极片212和壳体1；或者，在第二负极片312与壳体1之间设置绝缘件，以电隔离第二负极片312和壳体1。
在一些实施例中，第一电极组件2还包括从第一主体部21延伸出的第一正极耳22和第一负极耳23，第二电极组件3还包括从第二主体部31延伸出的第二正极耳32和第二负极耳33，第一正极耳22与第一正极片211连接，第一负极耳23与第一负极片212连接，第二正极耳32与第二正极片311连接，第二负极耳33与第二负极片312连接，第一正极耳22和第一负极耳23设置于第一主体部21的沿第一方向靠近第二主体部31的一端，第二正极耳32和第二负极耳33设置于第二主体部31的沿第一方向靠近第一主体部21的一端。
在上述一些实施例中，第一正极耳22、第一负极耳23、第二正极耳32和第二负极耳33均位于第一主体部21和第二主体部31之间，以使第一正极耳22和第一负极耳23均设置在第一主体部21的沿第一方向远离壳体1的一端，防止由于第一正极耳22和第一负极耳23的存在，而影响第一正极片211的沿第一方向远离第二主体部 31的一端和壳体1的第一内表面之间的直接接触；以及使第二正极耳32和第二负极耳33均设置在第二主体部31的沿第一方向远离壳体1的一端，防止由于第二正极耳32和第二负极耳33的存在，而影响第二正极片311的沿第一方向远离第一主体部21的一端和壳体1的第二内表面之间的直接接触。
将第一正极耳22、第一负极耳23、第二正极耳32和第二负极耳33均设置于位于第一主体部21和第二主体部31之间的空间内，有利于实现增加电极组件与壳体1直接接触面积的目的，增强电极组件与壳体1之间的传热效果。而且，还可以缩短第一正极耳22和第二正极耳32之间的距离以及第一负极耳23和第二负极耳33之间的距离，缩短电流传输路径，减少能量消耗，降低热量的产生，防止电池单体20的温度过高而影响使用寿命和使用安全性。
如图10和图11所示，第一正极耳22和第一负极耳23分别从第一主体部21的底部向下延伸出来，第二正极耳32和第二负极耳33分别从第二主体部31的顶部向上延伸出来，第一正极耳22、第一负极耳23、第二正极耳32和第二负极耳33均位于第一主体部21和第二主体部31之间的间隙中，这样设置可以在第一主体部21的顶部和第二主体部31的底部实现第一正极片211与壳体1以及第二正极片311与壳体1之间的直接接触，增强换热效果，而且第一正极耳22和第二正极耳32之间的距离以及第一负极耳23和第二负极耳33之间的距离较短，有利于减少热量的产生，并从根本上降低电池单体20的温度。
在一些实施例中，第一主体部21中的部分第一正极片211的沿第一方向靠近第二主体部31的一端突出于第一主体部21以便延伸形成第一正极耳22，第一主体部21中的部分第一负极片212的沿第一方向靠近第二主体部31的一端突出于第一主体部21以便延伸形成第一负极耳23；第二主体部31中的部分第二正极片311的沿第一方向靠近第一主体部21的一端突出于第二主体部31以便延伸形成第二正极耳32，第二主体部31中的部分第二负极片312的沿第一方向靠近第一主体部21的一端突出于第二主体部31以便延伸形成第二负极耳33。
如图10和图11所示，第一正极耳22先自第一主体部21向靠近第二主体部31的方向延伸，然后再沿着与第一方向垂直的方向横向延伸，形成具有开口的U型结构。第二正极耳32先自第二主体部31向靠近第一主体部21的方向延伸，然后再沿着与第一方向垂直的方向横向延伸，形成具有开口的U型结构。第一负极耳23和第二负极耳33的形成方式可以与第一正极耳22和第二正极耳32的形成方式相似，这里不再详述。
在一些实施例中，电池单体20还包括支架4，支架4设置于第一主体部21和第二主体部31之间，以使第一正极片211与壳体1的第一内表面保持接触，以及使第二正极片311与壳体1的第二内表面保持接触。
通过设置支架4，可以对第一主体部21和第二主体部31起到支撑作用，使第一正极片211与壳体1的第一内表面保持接触，以及使第二正极片311与壳体1的第二内表面保持接触，防止由于自身重力或外力等问题造成第一正极片211远离壳体1的第一内表面或者第二正极片311远离壳体1的第二内表面，从而影响传热效率，降 低散热速度，造成电池单体温度过高。
比如，在第一主体部21和第二主体部31上下布置的应用场景中，支架4可以支撑位于上方的第一主体部21，防止由于第一主体部21的重力而挤压第二主体部31，对第二主体部31造成挤压伤害；而且，支架4通过支撑第一主体部21，还可以防止位于上方的第一主体部21中的第一正极片211远离壳体1而无法与壳体1的第一内表面保持接触，影响传热效果，进而降低第一电极组件2的散热速度，造成电池单体20的温度过高，影响电池单体的使用寿命和使用安全性。
在一些实施例中，第一主体部21包括用于使第一正极片211和第一负极片212保持绝缘的第一隔膜，第二主体部31包括用于使第二正极片311和第二负极片312保持绝缘的第二隔膜，支架4支撑于第一隔膜和第二隔膜之间。这样设置的好处是，避免支架4对第一正极片211、第一负极片212、第二正极片311和第二负极片312造成挤压伤害，有利于保护第一正极片211、第一负极片212、第二正极片311和第二负极片312，提高极片的寿命。
为了使支架4能够支撑于第一隔膜和第二隔膜之间，第一隔膜的沿第一方向靠近第二主体部31的一端可以突出于第一主体部21，以便使第一隔膜的沿第一方向靠近第二主体部31的一端长于第一正极片211和第一负极片212，使第一隔膜能够与支架4相接触，保持支架4对第一隔膜的支撑，从而保护第一正极片211和第一负极片212免受挤压；第二隔膜的沿第一方向靠近第一主体部21的一端可以突出于第二主体部31，以便使第二隔膜的沿第一方向靠近第一主体部21的一端长于第二正极片311和第二负极片312，使第二隔膜能够与支架4相接触，保持支架4对第二隔膜的支撑，从而保护第二正极片311和第二负极片312免受挤压。
需要说明的是，在为了形成第一正极耳22时，需要使部分第一正极片211的沿第一方向靠近第二主体部31的一端突出于第一主体部21，即第一正极片211的沿第一方向靠近第二主体部31的一端长于第一负极片212和第一隔膜；而在为了形成第一负极耳23时，需要使部分第一负极片212的沿第一方向靠近第二主体部31的一端突出于第一主体部21，即第一负极片212的沿第一方向靠近第二主体部31的一端长于第一正极片211和第一隔膜；而在为了使支架4能够支撑于第一隔膜时，需要使第一隔膜沿第一方向的靠近第二主体部31的一端突出于第一主体部21，即第一隔膜的沿第一方向靠近第二主体部31的一端长于第一正极片211和第一负极片212。这三处的设置可能会被误解为是相互矛盾的，但其实并不矛盾，因为第一主体部21的靠近第二主体部31的端面具有预设的面积，无论是在为了形成第一正极耳22和的第一负极耳23时还是为了使支架4能够支撑于第一隔膜时，均可以在预设的区域内完成相应的设置，而不需要将第一主体部21的靠近第二主体部31的整个端面均设置为同样的结构，因此通过分区域设置可以实现对应的目的。
同样需要说明的是，在为了形成第二正极耳32时，需要使部分第二正极片311的沿第一方向靠近第一主体部21的一端突出于第二主体部31，即第二正极片311的沿第一方向靠近第一主体部21的一端长于第二负极片312和第一隔膜；而在为了形成第二负极耳33时，需要使部分第二负极片312的沿第一方向靠近第一主体部21的一端 突出于第二主体部31，即第二负极片312的沿第一方向靠近第一主体部21的一端长于第二正极片311和第一隔膜；而在为了使支架4能够支撑于第二隔膜时，需要使第二隔膜沿第一方向的靠近第一主体部21的一端突出于第二主体部31，即第二隔膜的沿第一方向靠近第一主体部21的一端长于第二正极片311和第二负极片312。这三处的设置可能会被误解为是相互矛盾的，但其实并不矛盾，因为第二主体部31的靠近第一主体部21的端面具有预设的面积，无论是在为了形成第二正极耳32和的第二负极耳33时还是为了使支架4能够支撑于第二隔膜时，均可以在预设的区域内完成相应的设置，而不需要将第二主体部31的靠近第一主体部21的整个端面均设置为同样的结构，因此通过分区域设置可以实现对应的目的。
在一些实施例中，支架4包括第一支撑部41、第二支撑部42以及连接于第一支撑部41和第二支撑部42之间的第三支撑部43，第一支撑部41支撑于第一主体部21和第一正极耳22之间以及第一主体部21和第一负极耳23之间，第二支撑部42支撑于第二主体部31和第二正极耳32之间以及第二主体部31和第二负极耳33之间。这种结构的支架4的优势在于，在电池单体20处于工作状态时，无论第一电极组件2和第二电极组件3中的哪个位于上方，均可以实现对第一电极组件2和第二电极组件3的有效支撑，安装和操作都比较方便。
如图12至14所示，支架4的侧面形状呈U型，这种结构可以通过第一支撑部41和第二支撑部42分别支撑第一电极组件2和第二电极组件3。第一支撑部41可以插入第一正极耳22和第一负极耳23分别弯折形成的开口内，第二支撑部42可以插入第二正极耳32和第二负极耳33分别弯折形成的开口内。
在一些实施例中，电池单体20还包括第一转接片5、第二转接片6、正极柱7和负极柱8，第一正极耳22和第二正极耳32均与第一转接片5连接，第一转接片5与正极柱7连接，第一负极耳23和第二负极耳33均与第二转接片6连接，第二转接片6与负极柱8连接。
在上述一些实施例中，第一正极耳22和第二正极耳32均与第一转接片5连接，第一负极耳23和第二负极耳33均与第二转接片6连接，因此第一电极组件2和第二电极组件3实现了共用转接片，可以减少电池单体20的组成部件的数量，节约成本；同时，共用转接片也可以简化电池单体20内部的结构布置，节省空间，减小电池单体20的体积。
如图10和图11所示，第一正极耳22可以与第二正极耳32相对布置，第一负极耳23可以与第二负极耳33相对布置，以便于布置与第一正极耳22和第二正极耳32连接的第一转接片5以及与第一负极耳23和第二负极耳33连接的第二转接片6。
在一些实施例中，正极柱7安装于壳体1的第一侧面，负极柱8安装于壳体1的第二侧面，第一侧面与第二侧面相对设置，且第一侧面和第二侧面均与第一方向平行。
将正极柱7和负极柱8分别设置于壳体1的相对于第一方向的两侧，便于使位于第一主体部21和第二主体部31之间的第一正极耳22和第二正极耳32通过横向延伸与正极柱7连接，以及使位于第一主体部21和第二主体部31之间的第一负极耳23 和第二负极耳33通过横向延伸与负极柱8连接，这样可以使第一转接片5和第二转接片6的长度较短，通过缩短第一转接片5和第二转接片6的长度，可以降低电路损失，减少热量的产生。
在一些实施例中，电池单体包括第一端盖1a和第二端盖1b，壳体1的第一侧面设有第一开口，壳体2的第二侧面设有第二开口，第一端盖1a用于封堵第一开口，第二端盖1b用于封堵第二开口。正极柱7安装于第一端盖1a上，负极柱8安装于第二端盖1b上。
如图15和图16以及图18和图19所示，正极柱7包括第一内极柱71和第一外极柱72，第一套筒7a安装于第一端盖1a，第一外极柱72设置于第一端盖1a的外侧并与第一套筒7a连接，第一转接片5与第一内极柱71的第一端连接，第一内极柱71的第二端穿过第一套筒7a并在壳体1的外侧与第一套筒7a连接。相比于内侧来说，壳体1的外侧操作空间更大，因此在壳体1的外侧实现第一内极柱71和第一套筒7a的固定和连接，可以使操作更加方便，有利于提高组装效率。
通过设置包括第一内极柱71和第一外极柱72的正极柱7以及第一套筒7a，并将第一套筒7a安装于第一端盖1a上，在装配电池单体时，可以先将第一转接片5与第一内极柱71的第一端连接，然后将电极组件装入壳体1的内部，然后在封装第一端盖1a时使第一内极柱71的第二端通过第一套筒7a穿出壳体1之外，在固定第一端盖1a后在壳体1的外侧将第一内极柱71与第一套筒7a连接，使第一内极柱71与第一外极柱72通过第一套筒7a连接在一起，形成正极柱7。
其中，第一套筒7a包括第一套筒部和第一限位部，第一端盖1a设有第一通孔，第一套筒部插入第一通孔，第一限位部与第一套筒部连接，第一限位部位于第一端盖1a的内侧，第一限位部的尺寸大于第一通孔的尺寸，以对第一套筒部进行限位，防止第一套筒部脱离第一通孔。
第一套筒7a的中心设有贯穿的第二通孔，第一内极柱71包括第一柱体部和第二限位部，第一柱体部插入第二通孔内，第二限位部与第一柱体部连接，第二限位部位于第一套筒7a的内侧，第二限位部的尺寸大于第二通孔的尺寸，第二限位部与第一限位部接触，以对第一柱体部进行限位，防止第一柱体部脱离第二通孔。第一外极柱72用于与用电部件的正极电连接。
负极柱8和第二端盖1b的连接方式可以与正极柱7和第一端盖1a的连接方式相同，也可以不同。比如，负极柱8和第二端盖1b之间可以设置第二套筒8a，也可以不设置第二套筒8a。
在如图15和图18所示的实施例中，负极柱8和第二端盖1b之间没有设置第二套筒8a。负极柱8包括第二内极柱81和第二外极柱82，第二外极柱82设置于第二端盖1b的外侧，第二内极柱81的第一端位于第二端盖1b的内侧并与第二转接片6连接，第二内极柱81的第二端穿过第二端盖1b与第二外极柱82连接。
在如图17和图20所示的实施例中，负极柱8和第二端盖1b之间设置有第二套筒8a。负极柱8包括第二内极柱81和第二外极柱82，第二套筒8a安装于第二端盖1b，第二外极柱82设置于第二端盖1b的外侧并与第二套筒8a连接，第二转接片6与 第二内极柱81的第二端连接，第二内极柱81的第二端穿过第二套筒8a并在壳体1的外侧与第二套筒8a连接。相比于内侧来说，壳体1的外侧操作空间更大，因此在壳体1的外侧实现第二内极柱81和第二套筒8a的固定和连接，可以使操作更加方便，有利于提高组装效率。
通过设置包括第二内极柱81和第二外极柱82的负极柱8以及第二套筒8a，并将第二套筒8a安装于第二端盖1b上，在装配电池单体时，可以先将第二转接片6与第二内极柱81的第一端连接，然后将电极组件装入壳体1的内部，然后在封装第二端盖1b时使第二内极柱81的第二端通过第二套筒8a穿出壳体1之外，在固定第二端盖1b后在壳体1的外侧将第二内极柱81与第二套筒8a连接，使第二内极柱81与第二外极柱82通过第二套筒8a连接在一起，形成负极柱8。
其中，第二套筒8a包括第二套筒部和第三限位部，第二端盖1b设有第三通孔，第二套筒部插入第三通孔，第三限位部与第二套筒部连接，第三限位部位于第二端盖1b的内侧，第三限位部的尺寸大于第三通孔的尺寸，以对第二套筒部进行限位，防止第二套筒部脱离第三通孔。
第二套筒8a的中心设有贯穿的第四通孔，第二内极柱81包括第一柱体部和第四限位部，第一柱体部插入第四通孔内，第四限位部与第一柱体部连接，第四限位部位于第二套筒8a的内侧，第四限位部的尺寸大于第四通孔的尺寸，第四限位部与第三限位部接触，以对第一柱体部进行限位，防止第一柱体部脱离第四通孔。第二外极柱82用于与用电部件的正极电连接。
对于如图15和图18所示的实施例，在组装电池单体时，可以在将电极组件装入壳体1之前，先在壳体1的外部，将第二内极柱81和第二外极柱82安装于第二端盖1b，将第二转接片6与第一负极耳23和第二负极耳33连接，再将第二转接片6与第二内极柱81连接，将第一转接片5与第一正极耳22和第二正极耳32连接，再第一转接片5与第一内极柱71连接，然后将第二端盖1b、负极柱8、第二转接片6、电极组件、第一转接片5和第一内极柱71组成的整体装入壳体1的内部，最后将已经安装有第一外极柱72和第一套筒7a的第一端盖1a封装在壳体1的第二侧面，使第一内极柱71的第二端穿出壳体1的外侧，以便使第一内极柱71与第一套筒7a在壳体1的外侧通过焊接连接，完成组装。
而对于如图17和图20所示的实施例来说，负极柱8和第二端盖1b之间设有第二套筒8a，则可以参考上述的第一端盖1a的组装方式，先将第一内极柱71与第一转接片5连接，第二内极柱81与第二转接片6连接，然后在将电极组件装入壳体1之后再在封装第一端盖1a后连接第一内极柱71和第二套筒7a以及在封装第二端盖1b后连接第二内极柱81与第二套筒8a。
对于第一转接片5和第二转接片6的结构形式可以有多种选择。
比如，在如图15和图16所示的实施例中，第一转接片5包括沿与第一方向垂直的方向延伸的第一连接部51，第一连接部51与第一正极耳22和第二正极耳32连接，且第一连接部51的靠近正极柱7的端部与正极柱7连接。
在如图18和图19所示的实施例中，第一转接片5包括沿与第一方向垂直的方 向延伸的第一连接部51和沿与第一方向平行的方向延伸的第二连接部52，第一连接部51和第二连接部52连接成L形，第一连接部51与第一正极耳22和第二正极耳32连接，第二连接部52与正极柱7连接。这种结构可以通过增大第二连接部52与正极柱7的接触面积而增强第一转接片5与正极柱7的连接稳定性。
类似地，在如图15和图17所示的实施例中，第二转接片6包括沿与第一方向垂直的方向延伸的第三连接部61，第三连接部61与第一负极耳23和第二负极耳33连接，且第三连接部61的靠近负极柱8的端部与负极柱8连接。
在如图18和图20所示的实施例中，第二转接片6包括沿与第一方向垂直的方向延伸的第三连接部61和沿与第一方向平行的方向延伸的第四连接部62，第三连接部61和第四连接部62连接成L形，第三连接部61与第一负极耳23和第二负极耳33连接，第四连接部62与负极柱8连接。这种结构可以通过增大第四连接部62与负极柱8的接触面积而增强第二转接片6与负极柱8的连接稳定性。
在一些实施例中，电池单体20还包括设置于壳体1内的第一绝缘件9，第一绝缘件9用于电隔离负极柱8和壳体1。
在本申请的一些实施例中，虽然第一电极组件2中的第一负极片212与壳体1之间保持绝缘，第二电极组件3中的第二负极片312与壳体1之间也保持绝缘，但是第一电极组件2中的第一正极片211的一端与壳体1的第一内表面直接接触，第二电极组件3中的第二正极片311的一端与壳体1的第二内表面直接接触，而且第一电极组件2中的第一正极耳22和第二电极组件3中的第二正极耳32均通过第一转接片5与正极柱7连接，因此通过设置能够电隔离负极柱8和壳体1的第一绝缘件9，可以防止负极柱8通过壳体1与正极柱7发生电连接，进而造成电路短路，影响电池单体的安全性，还可能导致电池单体的功能性失效。
在如图15或17所示的实施例中，电池单体20还包括设置于壳体1内的第二绝缘件10，第二绝缘件10用于电隔离正极柱7和壳体1。
鉴于第一电极组件2中的第一正极片211的一端与壳体1的第一内表面直接接触，第二电极组件3中的第二正极片311的一端与壳体1的第二内表面直接接触，而且第一电极组件2中的第一正极耳22和第二电极组件3中的第二正极耳32均通过第一转接片5与正极柱7连接，即正极柱7和壳体1之间通过第一转接片5、第一正极耳22和第一正极片211以及第一转接片5、第二正极耳32和第二正极片311实现了电连接，因此在其他实施例中，也可以省略第二绝缘件10。
在一些实施例中，第一主体部21还包括第一隔膜，第一主体部21通过第一正极片211、第一负极片212和第一隔膜共同卷绕形成，第一方向与第一主体部21的卷绕中心线平行；和/或，第二主体部31还包括第二隔膜，第二主体部31通过第二正极片311、第二负极片312和第二隔膜共同卷绕形成，第一方向与第二主体部31的卷绕中心线平行。在这些实施例中，第一主体部21和第二主体部31均为卷绕式的结构，采用卷绕式结构时，第一方向为第一主体部21和第二主体部31的卷绕中心线。
在其他实施例中，第一主体部21和第二主体部31也可以采用正、负极片和隔膜以层叠放置的方式制造而成，采用这种叠片式结构时，可以选择正、负极片可以从 两头伸出的方向作为第一方向。
在本申请提供的一些实施例中，壳体1采用金属材料制成。第一正极片211和第二正极片311均为金属材料，因此第一正极片211和壳体1之间以及第二正极片311和壳体1之间均可以实现金属与金属的直接接触，大幅提高传热效率，有效降低电池单体的温度。
本申请还提供了一种电池，包括上述的电池单体。
本申请还提供了一种用电设备，包括上述的电池，电池用于向用电设备供应电能。
本申请还提供了一种电池单体的制造方法，包括：
提供壳体1、第一主体部21和第二主体部31，第一主体部21包括第一正极片211和第一负极片212，第二主体部31包括第二正极片311和第二负极片312；
将第一主体部21和第二主体部31均设置于壳体1内；和
将第一主体部21和第二主体部31沿第一方向间隔布置，第一正极片211的沿第一方向远离第二主体部31的一端与壳体1的第一内表面接触，第一负极片212的沿第一方向远离第二主体部31的一端与壳体1的第一内表面之间绝缘；和/或，第二正极片311的沿第一方向远离第一主体部21的一端与壳体1的第二内表面接触，第二负极片312的沿第一方向远离第一主体部21的一端与壳体1的第二内表面之间绝缘，第一内表面与第二内表面相对设置。
本申请还提供了一种电池单体的制造装置，包括提供装置和放置装置，提供装置被配置为提供壳体1、第一主体部21和第二主体部31，第一主体部21包括第一正极片211和第一负极片212，第二主体部31包括第二正极片311和第二负极片312；放置装置被配置为将第一主体部21和第二主体部31均设置于壳体1内，将第一主体部21和第二主体部31沿第一方向间隔布置，第一正极片211的沿第一方向远离第二主体部31的一端与壳体1的第一内表面接触，第一负极片212的沿第一方向远离第二主体部31的一端与壳体1的第一内表面之间绝缘；和/或，第二正极片311的沿第一方向远离第一主体部21的一端与壳体1的第二内表面接触，第二负极片312的沿第一方向远离第一主体部21的一端与壳体1的第二内表面之间绝缘，第一内表面与第二内表面相对设置。
本申请提供的电池单体各个实施例所具备的积极效果同样适用于电池、用电设备、电池单体的制造方法和电池单体的制造装置，这里不再赘述。
下面结合附图3至17对本申请提供的电池单体一些实施例的结构进行描述。
如图3至6所示，分别为电池单体20的立体图、主视图、俯视图和左视图。电池单体20包括壳体1，壳体1包括容纳本体、第一端盖和第二端盖，容纳本体的左侧设有第一开口，右侧设有第二开口，第一端盖用于封闭第一开口，第二端盖用于封闭第二开口，第一端盖上安装有负极柱8，第二端盖上安装有正极柱7。
如图7所示，壳体1的内部设有第一电极组件2和第二电极组件3，第一方向为上下方向，第一电极组件2设置于第二电极组件3的上方。第一电极组件2和第二电极组件3的结构相同，且关于第一电极组件2和第二电极组件3之间的中线上下对 称布置。
第一电极组件2包括第一主体部21、自第一主体部21向下延伸出的第一正极耳22和第一负极耳23。第二电极组件3包括第二主体部31、自第二主体部31向上延伸出的第二正极耳32和第二负极耳33。第一正极耳22和第二正极耳32相对地设置于壳体1的靠近第二端盖的一侧。第一负极耳23和第二负极耳33相对地设置于壳体1的靠近第一端盖的一侧。
在如图7所示的实施例中，第一正极耳22和第二正极耳32分别与第一转接片5连接，第一转接片5与正极柱7连接。第一负极耳23和第二负极耳33分别与第二转接片6连接，第二转接片6与负极柱8连接。
第一正极耳22、第一负极耳23、第二正极耳32和第二负极耳33均设置在第一主体部21和第二主体部31之间，正极柱7和负极柱8分别设置在壳体1的右侧和左侧，因此可以使第一转接片5基本水平地延伸至正极柱7，以及第二转接片6基本水平地延伸至负极柱8，从而有效缩短第一转接片5和第二转接片6的长度，减少产热量，降低电池单体20的温度。
壳体1的内侧还有第一绝缘件9和第二绝缘件10，第一绝缘件9用于电隔离负极柱8和壳体1，第二绝缘件10用于电隔离正极柱7和壳体1。在一些实施例中，可以省略第二绝缘件10。第一绝缘件9和第二绝缘件10可以采用塑胶材料。正极柱7和壳体1之间以及负极柱8和壳体1之间可以采用铆接连接，连接处可以设置密封圈。密封圈可以氟橡胶材料。
如图8所示，第一主体部21包括第一正极片211和第一负极片212，第一正极片211包括第一集流体211a和第一活性物质层211b。在第一主体部21的顶部，第一集流体211a比第一活性物质层211b的长度长，第一集流体211a与壳体1的顶部内表面紧密接触，可以增强第一正极片211与壳体1之间的传热作用，使热量及时地散发到壳体1的外部，有效降低电池单体20的温度。第二活性物质层211b和第一负极片212与壳体1的顶部内表面之间均具有预设距离。而且，第一负极片212的长度比第一活性物质层211b的长度长。
如图9所示，第二主体部31包括第二正极片311和第二负极片312，第二正极片311包括第二集流体311a和第二活性物质层311b。在第二主体部31的底部，第二集流体311a比第二活性物质层311b的长度长，第二集流体311a与壳体1的底部内表面紧密接触，可以增强第二正极片311与壳体1之间的传热作用，使热量及时地散发到壳体1的外部，有效降低电池单体20的温度。第二活性物质层311b和第二负极片312与壳体1的底部内表面之间均具有预设距离。而且，第二负极片312的长度比第二活性物质层311b的长度长。
如图10和图11所示，第一正极耳22和第一负极耳23分别自第一主体部21延伸出来并弯折形成具有开口的U型结构。第二正极耳32和第二负极耳33分别自第二主体部31延伸出来并弯折形成具有开口的U型结构。
第一负极片212包括第三集流体212a和第三活性物质层212b。在第一主体部21的底部靠近负极柱8的位置，第三集流体212a比第三活性物质层212b的长度长， 第三集流体212a与第一负极耳23接触。第三活性物质层212b和第一正极片211与第一负极耳23之间均具有预设距离。而且，第一正极片211的长度比第三活性物质层212b的长度长。
第二负极片312包括第四集流体312a和第四活性物质层312b。在第二主体部31的顶部靠近负极柱8的位置，第四集流体312a比第四活性物质层312b的长度长，第四集流体312a与第二负极耳33接触。第四活性物质层312b和第二正极片311与第二负极耳33之间均具有预设距离。而且，第二正极片311的长度比第四活性物质层312b的长度长。
虽然在图10中未示出，但是可以理解的是，在第一主体部21的底部靠近正极柱7的位置，第一集流体211a比第一活性物质层211b的长度长，第一集流体211a与第一正极耳22接触。第一活性物质层211b和第一负极片212与第一正极耳22之间均具有预设距离。而且，第一负极片212的长度比第一活性物质层211b的长度长。在第二主体部31的底部靠近正极柱7的位置，第二集流体311a比第二活性物质层311b的长度长，第二集流体311a与第二正极耳32接触。第二活性物质层311b和第二负极片312与第二正极耳32之间均具有预设距离。而且，第二负极片312的长度比第二活性物质层311b的长度长。
如图12至14所示，第一主体部21和第二主体部31之间设有支架4，支架4呈U型结构，支架4包括第一支撑部41、第二支撑部42和连接于第一支撑部41和第二支撑部42之间的第三支撑部43，第一支撑部41和第二支撑部42呈平板式结构，第一支撑部41插入分别在第一正极耳22和第一负极耳23上形成的开口中，第二支撑部42插入分别在第二正极耳32和第二负极耳33上形成的开口中。
在如图15、16、18和19所示的实施例中，电池单体包括第一端盖1a和第二端盖1b，壳体1的第一侧面设有第一开口，壳体2的第二侧面设有第二开口，第一端盖1a用于封堵第一开口，第二端盖1b用于封堵第二开口。正极柱7安装于第一端盖1a上，负极柱8安装于第二端盖1b上。正极柱7包括第一内极柱71和第一外极柱72，第一套筒7a安装于第一端盖1a，第一外极柱72设置于第一端盖1a的外侧并与第一套筒7a连接，第一转接片5与第一内极柱71的第一端连接，第一内极柱71的第二端穿过第一套筒7a并在壳体1的外侧与第一套筒7a连接。负极柱8包括第二内极柱81和第二外极柱82，第二外极柱82设置于第二端盖1b的外侧，第二内极柱81的第一端位于第二端盖1b的内侧并与第二转接片6连接，第二内极柱81的第二端穿过第二端盖1b与第二外极柱82连接。
在如图17和图20所示的实施例中，负极柱8包括第二内极柱81和第二外极柱82，第二套筒8a安装于第二端盖1b，第二外极柱82设置于第二端盖1b的外侧并与第二套筒8a连接，第二转接片6与第二内极柱81的第二端连接，第二内极柱81的第二端穿过第二套筒8a并在壳体1的外侧与第二套筒8a连接。
如图15至17所示，在该实施例中，第一转接片5和第二转接片6均为平直形状。第一转接片5的一端分别与第一正极耳22和第二正极耳32连接，另一端与正极柱7连接。第二转接片6的一端分别与第一负极耳23和第二负极耳33连接，另一端 与负极柱8连接。
如图18至20所示，在该实施例中，第一转接片5和第二转接片6均为L型形状。第一转接片5的第一连接部51分别与第一正极耳22和第二正极耳32连接，第二连接部52与正极柱7连接，通过增大第二连接部52与正极柱7的接触面积，可以增强第二连接部52与正极柱7电连接的稳定性。第二转接片6的第三连接部61分别与第一负极耳23和第二负极耳33连接，第四连接部62与负极柱8连接，通过增大第四连接部62与负极柱8的接触面积，可以增强第四连接部与负极柱8电连接的稳定性。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (20)

  1. 一种电池单体，包括：
    壳体(1)；
    第一主体部(21)，设置于所述壳体(1)内，所述第一主体部(21)包括第一正极片(211)和第一负极片(212)；和
    第二主体部(31)，设置于所述壳体(1)内，所述第二主体部(31)包括第二正极片(311)和第二负极片(312)；
    其中，所述第一主体部(21)和所述第二主体部(31)沿第一方向间隔布置，所述第一正极片(211)的沿所述第一方向远离所述第二主体部(31)的一端突出于所述第一主体部(21)并与所述壳体(1)的第一内表面接触，所述第一负极片(212)与所述壳体(1)的第一内表面之间绝缘；和/或，所述第二正极片(311)的沿所述第一方向远离所述第一主体部(21)的一端突出于所述第二主体部(31)并与所述壳体(1)的第二内表面接触，所述第二负极片(312)与所述壳体(1)的第二内表面之间绝缘，所述第一内表面与所述第二内表面相对设置。
  2. 根据权利要求1所述的电池单体，其中，所述第一正极片(211)包括第一集流体(211a)和形成于所述第一集流体(211a)上的第一活性物质层(211b)，所述第一集流体(211a)的沿所述第一方向远离所述第二主体部(31)的一端突出于所述第一活性物质层(211b)并与所述壳体(1)的第一内表面接触；所述第二正极片(311)包括第二集流体(311a)和形成于所述第二集流体(311a)上的第二活性物质层(311b)，所述第二集流体(311a)的沿所述第一方向远离所述第一主体部(21)的一端突出于所述第二活性物质层(311b)并与所述壳体(1)的第二内表面接触。
  3. 根据权利要求1或2所述的电池单体，其中，所述第一负极片(212)的沿所述第一方向远离所述第二主体部(31)的一端与所述壳体(1)的第一内表面之间具有第一预设距离，所述第二负极片(312)的沿所述第一方向远离所述第一主体部(21)的一端与所述壳体(1)的第二内表面之间具有第二预设距离。
  4. 根据权利要求1至3任一项所述的电池单体，还包括从所述第一主体部(21)延伸出的第一正极耳(22)和第一负极耳(23)以及从所述第二主体部(31)延伸出的第二正极耳(32)和第二负极耳(33)，所述第一正极耳(22)和所述第一负极耳(23)设置于所述第一主体部(21)的沿所述第一方向靠近所述第二主体部(31)的一端，所述第二正极耳(32)和所述第二负极耳(33)设置于所述第二主体部(31)的沿所述第一方向靠近所述第一主体部(21)的一端。
  5. 根据权利要求1至4任一项所述的电池单体，还包括支架(4)，所述支架(4)设置于所述第一主体部(21)和所述第二主体部(31)之间，以使所述第一正极片(211)与所述壳体(1)的第一内表面保持接触，以及使所述第二正极片(311)与所述壳体(1)的第二内表面保持接触。
  6. 根据权利要求5所述的电池单体，其中，所述支架(4)包括第一支撑部 (41)、第二支撑部(42)以及连接于所述第一支撑部(41)和所述第二支撑部(42)之间的第三支撑部(43)，所述第一支撑部(41)支撑于所述第一主体部(21)和所述第一正极耳(22)之间以及所述第一主体部(21)和所述第一负极耳(23)之间，所述第二支撑部(42)支撑于所述第二主体部(31)和所述第二正极耳(32)之间以及所述第二主体部(31)和所述第二负极耳(33)之间。
  7. 根据权利要求4至6任一项所述的电池单体，还包括第一转接片(5)、第二转接片(6)、正极柱(7)和负极柱(8)，所述第一正极耳(22)和所述第二正极耳(32)均与所述第一转接片(5)连接，所述第一转接片(5)与所述正极柱(7)连接，所述第一负极耳(23)和所述第二负极耳(33)均与所述第二转接片(6)连接，所述第二转接片(6)与所述负极柱(8)连接。
  8. 根据权利要求7所述的电池单体，其中，所述正极柱(7)安装于所述壳体(1)的第一侧面，所述负极柱(8)安装于所述壳体(1)的第二侧面，所述第一侧面与所述第二侧面相对设置，且所述第一侧面和所述第二侧面均与所述第一方向平行。
  9. 根据权利要求8所述的电池单体，还包括第一端盖(1a)和第二端盖(1b)，所述壳体(1)的所述第一侧面设有第一开口，所述壳体(2)的所述第二侧面设有第二开口，所述第一端盖(1a)用于封堵所述第一开口，所述第二端盖(1b)用于封堵所述第二开口。
  10. 根据权利要求9所述的电池单体，还包括第一套筒(7a)，所述正极柱(7)包括第一内极柱(71)和第一外极柱(72)，所述第一套筒(7a)安装于所述第一端盖(1a)，所述第一外极柱(72)设置于所述第一端盖(1a)的外侧并与所述第一套筒(7a)连接，所述第一转接片(5)与所述第一内极柱(71)的第一端连接，所述第一内极柱(71)的第二端穿过所述第一套筒(7a)并在所述壳体(1)的外侧与所述第一套筒(7a)连接。
  11. 根据权利要求9或10所述的电池单体，还包括第二套筒(8a)，所述负极柱(8)包括第二内极柱(81)和第二外极柱(82)，所述第二套筒(8a)安装于所述第二端盖(1b)，所述第二外极柱(82)设置于所述第二端盖(1b)的外侧并与所述第二套筒(8a)连接，所述第二转接片(6)与所述第二内极柱(81)的第二端连接，所述第二内极柱(81)的第二端穿过所述第二套筒(8a)并在所述壳体(1)的外侧与所述第二套筒(8a)连接。
  12. 根据权利要求7至11任一项所述的电池单体，其中，所述第一转接片(5)包括沿与所述第一方向垂直的方向延伸的第一连接部(51)，所述第一连接部(51)与所述第一正极耳(22)和所述第二正极耳(32)连接，且所述第一连接部(51)的靠近所述正极柱(7)的端部与所述正极柱(7)连接；或者，所述第一转接片(5)包括沿与所述第一方向垂直的方向延伸的第一连接部(51)和沿与所述第一方向平行的方向延伸的第二连接部(52)，所述第一连接部(51)和所述第二连接部(52)连接成L形，所述第一连接部(51)与所述第一正极耳(22)和所述第二正极耳(32)连接，所述第二连接部(52)与所述正极柱(7)连接。
  13. 根据权利要求7至12任一项所述的电池单体，其中，所述第二转接片(6)包 括沿与所述第一方向垂直的方向延伸的第三连接部(61)，所述第三连接部(61)与所述第一负极耳(23)和所述第二负极耳(33)连接，且所述第三连接部(61)的靠近所述负极柱(8)的端部与所述负极柱(8)连接；或者，所述第二转接片(6)包括沿与所述第一方向垂直的方向延伸的第三连接部(61)和沿与所述第一方向平行的方向延伸的第四连接部(62)，所述第三连接部(61)和所述第四连接部(62)连接成L形，所述第三连接部(61)与所述第一负极耳(23)和所述第二负极耳(33)连接，所述第四连接部(62)与所述负极柱(8)连接。
  14. 根据权利要求7至13任一项所述的电池单体，还包括设置于所述壳体(1)内的第一绝缘件(9)，所述第一绝缘件(9)用于电隔离所述负极柱(8)和所述壳体(1)。
  15. 根据权利要求1至14任一项所述的电池单体，其中，所述第一主体部(21)还包括第一隔膜，所述第一主体部(21)通过所述第一正极片(211)、所述第一负极片(212)和所述第一隔膜共同卷绕形成，所述第一方向与所述第一主体部(21)的卷绕中心线平行；和/或，所述第二主体部(31)还包括第二隔膜，所述第二主体部(31)通过所述第二正极片(311)、所述第二负极片(312)和所述第二隔膜共同卷绕形成，所述第一方向与所述第二主体部(31)的卷绕中心线平行。
  16. 根据权利要求1至15任一项所述的电池单体，其中，所述壳体(1)采用金属材料制成。
  17. 一种电池，包括如权利要求1至16任一项所述的电池单体。
  18. 一种用电设备，包括如权利要求17所述的电池，所述电池用于向所述用电设备供应电能。
  19. 一种电池单体的制造方法，包括：
    提供壳体(1)、第一主体部(21)和第二主体部(31)，所述第一主体部(21)包括第一正极片(211)和第一负极片(212)，所述第二主体部(31)包括第二正极片(311)和第二负极片(312)；
    将所述第一主体部(21)和所述第二主体部(31)均设置于所述壳体(1)内；
    将所述第一主体部(21)和所述第二主体部(31)沿第一方向间隔布置，所述第一正极片(211)的沿所述第一方向远离所述第二主体部(31)的一端与所述壳体(1)的第一内表面接触，所述第一负极片(212)的沿所述第一方向远离所述第二主体部(31)的一端与所述壳体(1)的第一内表面之间绝缘；和/或，所述第二正极片(311)的沿所述第一方向远离所述第一主体部(21)的一端与所述壳体(1)的第二内表面接触，所述第二负极片(312)的沿所述第一方向远离所述第一主体部(21)的一端与所述壳体(1)的第二内表面之间绝缘，所述第一内表面与所述第二内表面相对设置。
  20. 一种电池单体的制造装置，包括：
    提供装置，被配置为提供壳体(1)、第一主体部(21)和第二主体部(31)，所述第一主体部(21)包括第一正极片(211)和第一负极片(212)，所述第二主体部(31)包括第二正极片(311)和第二负极片(312)；和
    放置装置，被配置为将所述第一主体部(21)和所述第二主体部(31)均设置于所述壳体(1)内，将所述第一主体部(21)和所述第二主体部(31)沿第一方向间隔布置，所述第一正极片(211)的沿所述第一方向远离所述第二主体部(31)的一端与所述壳体(1)的第一内表面接触，所述第一负极片(212)的沿所述第一方向远离所述第二主体部(31)的一端与所述壳体(1)的第一内表面之间绝缘；和/或，所述第二正极片(311)的沿所述第一方向远离所述第一主体部(21)的一端与所述壳体(1)的第二内表面接触，所述第二负极片(312)的沿所述第一方向远离所述第一主体部(21)的一端与所述壳体(1)的第二内表面之间绝缘，所述第一内表面与所述第二内表面相对设置。
PCT/CN2021/122037 2021-09-30 2021-09-30 电池单体、电池、用电设备、电池单体的制造方法和装置 WO2023050254A1 (zh)

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