WO2023050245A1 - 转接部件、电池单体、电池、用电装置以及电池单体的制造方法和制造设备 - Google Patents

转接部件、电池单体、电池、用电装置以及电池单体的制造方法和制造设备 Download PDF

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Publication number
WO2023050245A1
WO2023050245A1 PCT/CN2021/121994 CN2021121994W WO2023050245A1 WO 2023050245 A1 WO2023050245 A1 WO 2023050245A1 CN 2021121994 W CN2021121994 W CN 2021121994W WO 2023050245 A1 WO2023050245 A1 WO 2023050245A1
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WO
WIPO (PCT)
Prior art keywords
pole
adapter
adapter piece
main body
battery cell
Prior art date
Application number
PCT/CN2021/121994
Other languages
English (en)
French (fr)
Inventor
肖海河
张小文
刘强
周锡根
林明翔
钟韡
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 KR1020237003906A priority Critical patent/KR20230048023A/ko
Priority to EP21952110.1A priority patent/EP4181307A4/en
Priority to CN202180088196.2A priority patent/CN116745945A/zh
Priority to JP2023507603A priority patent/JP2023546770A/ja
Priority to PCT/CN2021/121994 priority patent/WO2023050245A1/zh
Priority to US18/106,511 priority patent/US20230187791A1/en
Publication of WO2023050245A1 publication Critical patent/WO2023050245A1/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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells 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
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/517—Methods for interconnecting adjacent batteries or cells by fixing means, e.g. screws, rivets or bolts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 manufacturing method and equipment for an adapter component, a battery cell, a battery, an electrical device, and a battery cell.
  • the battery cell includes a casing, an end cover and an electrode assembly arranged in the casing, and a pole is arranged on the end cover.
  • the present application provides a manufacturing method and equipment for an adapter component, a battery cell, a battery, an electrical device, and the battery cell, so as to simplify the assembly of the battery cell.
  • the present application provides an adapter part for a battery cell.
  • the adapter part includes a first adapter piece and a second adapter piece arranged in separate parts.
  • the first adapter piece is used to connect with a pole or One of the tabs is connected, and the second adapter piece is used to connect with the other one of the pole or the pole ear.
  • the first adapter piece generally extends along the first direction
  • the second adapter piece generally extends along the first direction.
  • the two directions extend, the first direction intersects with the second direction, and the first adapter piece and the second adapter piece are connected through a conductive structure.
  • the adapter part is set as a split first adapter piece and a second adapter piece, so that when assembling, the first adapter piece can be connected to the pole in advance, and the After the second adapter piece is connected to the tab of the electrode assembly, the electrode assembly is put into the case, and at this time, the ends of the first adapter piece and the second adapter piece are connected through a conductive structure to realize the electrode Enclosure of components.
  • the first adapter piece includes a first main body segment and a first connecting segment disposed at an end of the first main body segment, and the first main body segment is used to connect one of poles or tabs; the first The main body section extends along a first direction, the first connection section extends along a second direction, and the first connection section is connected to the second adapter piece.
  • the arrangement of the first connection section can increase the connection area between the first adapter piece and the second adapter piece, which facilitates the connection.
  • the second adapter piece includes a second main body segment and a second connecting segment connected to the first connecting segment, the second main body segment is used to connect the other of the pole post or the tab, wherein the first A connecting segment extends toward a side close to the second body segment relative to the first body segment; or, the first connecting segment extends toward a side away from the second body segment relative to the first body segment; or, in the second direction, the second body segment A connecting segment extends toward two sides relative to the first main body segment.
  • the first connection section and the first main body section are integrally formed.
  • the conductive structure includes a welded structure, a conductive adhesive bonding structure, a riveted structure or a conductive element.
  • the present application provides a battery cell, including a casing, a pole, an electrode assembly, and the above-mentioned transition part.
  • the casing has a housing chamber, and the electrode assembly is accommodated in the chamber. Integral molding, the housing includes two first side walls opposite in the second direction and two second side walls opposite in the third direction, the two first side walls and the two second side walls enclose An accommodating chamber is formed, the casing is provided with an opening at least in a first direction, the first direction, the second direction and the third direction are perpendicular to each other, and the electrode assembly includes a main body and a tab protruding from the main body to one side of the opening, The pole is arranged on the first side wall, and the end cover is arranged at the opening to close the accommodating cavity; the first adapter piece is connected with the pole pole, and the second adapter piece is connected with the pole ear.
  • the tab includes a positive tab and a negative tab, and the positive tab and the negative tab are disposed on the same side of the main body.
  • the pole is riveted or injection molded on the first side wall.
  • the present application provides a battery, including the battery cell described above.
  • the present application provides an electrical device, including the above-mentioned battery.
  • the present application provides a method for manufacturing a battery cell, including the following steps: providing an integrally formed housing, poles and end caps, the housing has at least one opening in the first direction and includes a second The two first side walls facing each other in the direction and the two second side walls facing each other in the third direction, the two first side walls and the two second side walls are enclosed to form an accommodation cavity, the first direction, the second side wall The second direction and the third direction are perpendicular to each other;
  • An electrode assembly is provided, the electrode assembly includes a main body and a tab protruding from the main body toward one side of the opening;
  • An adapter part is provided, and the adapter part includes a first adapter piece and a second adapter piece arranged separately, the pole is arranged on the first side wall and the first adapter piece is connected to the pole, and the second The adapter piece is connected with the tab and puts the electrode assembly into the casing, the first adapter piece and the second adapter piece are conductively connected, and the end cap is arranged at the opening to close the accommodating chamber.
  • the present application provides a battery cell manufacturing equipment, including:
  • the first providing module is configured to provide an integrally formed housing, poles and end caps, the housing includes two first side walls oppositely arranged in the second direction and two second second sidewalls oppositely arranged in the third direction
  • the side walls, the two first side walls and the two second side walls enclose to form an accommodating cavity, and the housing has at least one opening in the first direction;
  • the second providing module is configured to provide an electrode assembly, the electrode assembly includes a main body and tabs protruding outward from the main body;
  • the third providing module is configured to provide an adapter part, and the adapter part includes a first adapter piece and a second adapter piece arranged separately;
  • the assembly module is configured to install the pole on the first side wall, connect the first adapter piece to the pole pole, connect the second adapter piece to the pole ear, and place the electrode assembly in the accommodation cavity, and
  • the first adapter piece is electrically connected to the second adapter piece, and the end cap is arranged at the opening to seal the accommodating cavity.
  • Figure 1 is a schematic structural view of a vehicle in some embodiments of the present application.
  • Fig. 2 is a schematic diagram of an exploded structure of a battery in some embodiments of the present application.
  • Fig. 3 is a schematic perspective view of the three-dimensional structure of a battery cell in some embodiments of the present application.
  • Fig. 4 is a schematic perspective view of the housing of a battery cell in some embodiments of the present application.
  • FIG. 5 is a schematic top view of a battery cell in some embodiments of the present application.
  • Fig. 6 is a schematic cross-sectional structure diagram of the battery cell shown in Fig. 5 along the direction A-A;
  • FIG. 7 is a schematic diagram of a partially enlarged structure of part M in FIG. 6;
  • FIG. 8 is a schematic diagram of a partially enlarged structure of part N in FIG. 6;
  • FIG. 9 is a schematic perspective view of the three-dimensional structure of the adapter part in some embodiments of the present application.
  • Fig. 10 is a front structural schematic diagram of the adapter part shown in Fig. 9;
  • Fig. 11 is a schematic diagram of the steps of the manufacturing method of the battery cell in some embodiments of the present application.
  • FIG. 12 is a structural diagram of a manufacturing device for a battery cell according to some embodiments of the present application.
  • Battery cell 20 casing 21, first side wall 211, pole mounting hole 211a, second side wall 212, opening 213, electrode assembly 22, main body 221, tab 222, pole 23, inner pole 231 ; Outer pole 232; insulating sleeve 233; sealing ring 234; first insulating sheet 235; second insulating sheet 236; A connecting section 2612, a second adapter piece 262, a second main body section 2621, and a second connecting section 2622;
  • the battery cell manufacturing equipment 30 includes a first supply module 31 , a second supply module 32 , a third supply module 33 and an assembly module 34 .
  • multiple refers to more than two (including two), similarly, “multiple groups” refers to more than two groups (including two), and “multiple pieces” refers to More than two pieces (including two pieces).
  • a current battery cell generally includes a casing, an end cap, and an electrode assembly accommodated in the casing, and the casing is filled with electrolyte.
  • the electrode assembly is the part where the electrochemical reaction occurs in the battery cell
  • the casing is the component that forms the internal environment of the battery cell
  • the end cap is closed to the opening of the casing to isolate the internal environment of the battery cell from the external environment part.
  • the positive and negative poles are generally arranged on the same end cap, and the direction in which the poles are arranged is the same as the protruding direction of the tabs of the electrode assembly. This design makes the positive and negative connections between battery cells only on the same side.
  • the casings of other existing battery cells have two openings oppositely arranged in the length direction and end caps respectively arranged on the two openings, and the positive and negative poles are respectively arranged on the two ends. cover.
  • the inventors of the present application have found that during the assembly process of these battery cells, the electrode assembly needs to enter the casing from one opening and move to another opening, so that the movement of the electrode assembly when entering the casing is relatively long.
  • the battery cell can include a one-piece shell, and the two poles can be integrally assembled on the two opposite side walls of the shell, so that the electrode assembly There is no need to connect with the end cover in advance when entering the case, so it is convenient to enter the case and simplifies the assembly process of the battery cell.
  • the battery cells disclosed in the embodiments of the present application can be used, but not limited to, in electric devices such as vehicles, ships or aircrafts.
  • a power supply system comprising the electric device can be composed of the battery cells and batteries disclosed in this application.
  • the embodiment of the present application provides an electric device using a battery as a power source.
  • the electric device can be, but not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like.
  • electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc.
  • spacecraft may include airplanes, rockets, space shuttles, spaceships, etc.
  • a vehicle 1000 as an electric device according to an embodiment of the present application is taken as an example for description.
  • 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 further include a controller 200 and a motor 300 , the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, for starting, navigating, or working power requirements of the vehicle 1000 during 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 10 and battery cells 20 .
  • the battery cells 20 are accommodated in the case 10 .
  • the box body 10 is used to provide accommodating space for the battery cells 20 , and the box body 10 may adopt various structures.
  • the box body 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, the first part 11 and the second part 12 jointly define a of accommodation space.
  • the second part 12 can be a hollow structure with one end open, the first part 11 can be a plate-shaped structure, and the first part 11 covers the opening side of the second part 12, so that the first part 11 and the second part 12 jointly define an accommodation space .
  • the first part 11 and the second part 12 can also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12 .
  • the box body 10 formed by the first part 11 and the second part 12 can 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 composed of a plurality of battery cells 20 is housed in the box 10; of course, the battery 100 can also be a plurality of battery cells 20
  • the battery modules are firstly connected in series or parallel or in combination, and then multiple battery modules are connected in series or in parallel or in combination to form a whole, which is accommodated in the case 10 .
  • the battery 100 may also include other structures, for example, the battery 100 may also include a bus component for realizing electrical connection between multiple battery cells 20 .
  • each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but not limited thereto.
  • the battery cell 20 may be in the form of a cylinder, a flat body, a cuboid or other shapes.
  • FIG. 3 is a schematic perspective view of a battery cell 20 provided in some embodiments of the present application.
  • the battery cell 20 includes a casing 21 , an electrode assembly 22 , a pole 23 and other functional components.
  • the case 21 is a component that forms the internal environment of the battery cell 20 , wherein the formed internal environment can be used to accommodate the electrode assembly 22 , electrolyte, and other components.
  • the housing 21 can be in various shapes and sizes, such as cuboid, cylinder, hexagonal prism and so on. Specifically, the shape of the casing 21 can be determined according to the specific shape and size of the electrode assembly 22 .
  • the housing 21 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.
  • the electrode assembly 22 is a part where electrochemical reactions occur in the battery cell 20 .
  • One or more electrode assemblies 22 may be contained within the case 21.
  • the electrode assembly 22 is mainly formed by winding or stacking positive electrode sheets and negative electrode sheets, and a separator is usually provided between the positive electrode sheets and the negative electrode sheets.
  • the parts of the positive electrode sheet and the negative electrode sheet with active material constitute the main body part 221 of the electrode assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active material respectively constitute the tabs 222 .
  • the positive electrode active material and the negative electrode active material react with the electrolyte, and the pole 23 is used to electrically connect with the electrode assembly 22 for outputting or inputting electric energy of the battery cell 20 .
  • the end cap 24 refers to a component that covers the opening of the casing 21 to isolate the internal environment of the battery cell 20 from the external environment.
  • the shape of the end cap 24 can be adapted to the shape of the housing 21 to fit the housing 21 .
  • the end cap 24 can be made of a material (such as aluminum alloy) with a certain hardness and strength, so that the end cap 24 is not easily deformed when being squeezed and collided, so that the battery cell 20 can have a higher Structural strength and safety performance can also be improved.
  • the end cover 24 can 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, and the material of the end cover 24 can also be various, such as , copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in this embodiment of the present application.
  • FIG. 3 shows a schematic three-dimensional structure of a battery cell according to some embodiments of the present application
  • FIG. 4 shows a schematic three-dimensional structure of a housing of a battery cell according to some embodiments of the present application
  • FIG. 5 shows a schematic top view of a battery cell in some embodiments of the present application
  • FIG. 6 shows a schematic cross-sectional structure diagram of the battery cell along the direction A-A in FIG. 5 .
  • the battery cell 20 includes a casing 21 , an electrode assembly 22 and two poles 23 .
  • the housing 21 is integrally formed and includes at least one opening in the first direction Z, two first side walls 211 opposite in the second direction X, and two second side walls opposite in the third direction Y 212 , the two first side walls 211 and the two second side walls 212 enclose to form an accommodating chamber.
  • the first direction Z, the second direction X and the third direction Y are perpendicular to each other.
  • the electrode assembly 22 is accommodated in the containing cavity, and the electrode assembly 22 includes a main body 221 and two oppositely polarized tabs 222 extending outward from the main body 221 .
  • the two poles 23 are respectively arranged on the two first side walls 211 and are electrically connected to the two pole ears 222 respectively.
  • the first direction Z in the figure is the height direction of the battery cell 20
  • the second direction X is the length direction of the battery cell 20
  • the third direction Y is the thickness direction of the battery cell 20 .
  • the above-mentioned first sidewall 211 being arranged in the second direction X means that the first sidewall 211 is in the extension direction of the second direction X and the first sidewall 211 is perpendicular to the second direction X.
  • the second sidewall 212 being arranged in the third direction Y means that the second sidewall 212 is in the extension direction of the third direction Y and the second sidewall 212 is perpendicular to the third direction Y.
  • the opening 213 in the first direction Z means that at least one surface of the housing 21 in the first direction Z is open.
  • a pole mounting hole 211 a is disposed on the first side wall 211 of the housing 21 , and the pole 23 is mounted in the pole mounting hole 211 a.
  • the two tabs 222 of the electrode assembly 22 protrude from the same side of the main body 221 .
  • the two tabs 222 of the electrode assembly 22 may extend from different sides of the main body 221. For example, referring to FIG.
  • the two tabs 222 may extend from the left and right ends of the main body 221 respectively In this way, the connection between the pole lug 222 and the pole pole 23 can also be facilitated, for example, the connection between the pole pole 23 and the pole lug 222 can be realized through penetration welding or the like.
  • the two poles 23 are respectively arranged on the two first side walls 211 of the integrally formed casing 21, so that when the electrode assembly 22 is inserted into the casing, the stroke it needs to move is the width direction of the casing 21, and the stroke is shortened, which is convenient into the shell.
  • the two poles are integrally assembled on two opposite side walls of the casing, so that the electrode assembly does not need to be connected with the end cap before entering the casing, so it is convenient to enter the casing and simplifies the assembly process of the battery cell.
  • the two poles of the battery cell 20 are arranged on the two first side walls 211, so that the upper and lower sides of the battery cell 20 can be arranged with water-cooling parts, which expands the area of the water-cooling parts and improves the heat dissipation of the battery. performance.
  • the housing 21 is integrally formed through aluminum extrusion or stretching process.
  • the housing 21 further includes a bottom wall opposite to the opening 213.
  • the battery cell 20 further includes an end cap 24 disposed at the opening 213 to close the receiving cavity.
  • the area of the first side wall 211 is smaller than the area of the second side wall 212, and the housing 21 includes five faces like this, two large faces (the second side wall 212), two small faces (the second side wall 212). One side wall 211) and the bottom surface.
  • the pole 23 is directly assembled on the two small surfaces of the casing 21 , that is, the first side wall 211 . In this way, after the electrode assembly 22 is placed in the casing 21, only one end cap 24 needs to be welded to the casing 21 to close the casing 21. Compared with the need to weld two end caps in the prior art, the battery is simplified. Monolithic assembly process.
  • the casing 21 has two openings 213 oppositely arranged in the first direction Z, and the battery cell 20 further includes two end caps 24, and the two end caps 24 are correspondingly disposed on the two openings 213. A closed chamber is placed.
  • the housing 21 has four surfaces, two large surfaces and two small surfaces, which are vertically connected in the first direction Z and have two openings respectively located in the first direction Z.
  • the casing 21 is through in the first direction Z, so it can be formed by one stretch, and the process of stretch formation is simple.
  • the area of the first sidewall 211 is smaller than the area of the second sidewall 212 .
  • This arrangement makes the second side wall 212 of the casing 21 set in the same direction as the large surface of the electrode assembly 22, and the first side wall 211 of the casing 21 is set in the same direction as the thickness direction of the electrode assembly 22, thereby facilitating the entry of the electrode assembly 22. shell.
  • the pole 23 is riveted or injected on the first side wall 211 .
  • pole mounting holes 211 a are provided on the first side wall 211 .
  • the poles 23 have been directly assembled on the poles of the two first side walls 211 by riveting or injection molding. In the column mounting hole 211a.
  • the pole 23 includes an inner pole 231 , an outer pole 232 , a sealing sleeve 233 , a sealing ring 234 , a first insulating sheet 235 and a second insulating sheet 236 .
  • the inner pole 231 passes through the pole installation hole 211 a of the first side wall 211 and is partially exposed outside the first side wall 211 , and the outer pole 232 is sleeved outside the inner pole 231 .
  • the sealing sleeve 233 is sleeved on the outer side of the inner pole 231 to isolate the first side wall 211 from the inner pole 231 .
  • the sealing ring 234 is pressed against the outer wall of the sealing sleeve 233 so that the inner wall of the sealing sleeve 233 is in contact with the outer wall of the inner pole post 231. What is shown in the figure is a state where the two are not in contact during the assembly process, but after the assembly is completed The inner wall of the sealing sleeve 233 is in contact with the outer wall of the inner pole 231 .
  • a first insulating sheet 235 is disposed between the inner pole 231 and the inner wall surface of the first side wall 211 of the housing 21 .
  • both sides of the inner pole 231 are provided with first insulating sheets 235 .
  • a second insulating sheet 236 is disposed between the outer pole 232 and the outer surface of the first side wall 211 of the casing 21 .
  • the second insulating sheet 236 has a groove for locking the outer pole 232 .
  • the sealing ring 234 can be made of fluorine rubber.
  • two tabs 222 protrude from the main body 221 toward the side of the opening 213 .
  • the pole 23 is arranged on the first side wall 221 of the housing 21, that is to say, the protruding direction of the pole 222 and the pole 23 is inconsistent, so the connection between the pole 222 and the pole 23 needs to be connected through a transfer.
  • Part 26 is connected. The inventor found in research that if the integrated adapter part 26 is used to connect the tab 222 and the pole 23 , the battery cell 20 cannot be assembled. For example, the adapter part 26 is connected to the tab 222 first, and then the electrode assembly 22 connected with the adapter part 26 is put into the housing 21 .
  • the adapter part 26 will block the entry of the electrode assembly 22 into the case, resulting in the inability of the electrode assembly 22 to enter the case.
  • the inventors of the present application propose to set the adapter part 26 as a first adapter piece 261 and a second adapter piece 262 which are separately arranged.
  • the first adapter piece 261 is used to connect to one of the pole or the pole ear
  • the second adapter piece 262 is used to connect to the other one of the pole 23 or the pole ear 222.
  • the first adapter piece 261 is generally Extend along the first direction Z
  • the second adapter piece 262 generally extends along the second direction X
  • the first direction Z intersects the second direction X
  • the first adapter piece 261 and the second adapter piece 262 pass through Conductive structural connections.
  • the battery cell 20 also includes an adapter part 26 .
  • the adapter component 26 includes a first adapter piece 261 and a second adapter piece 262 which are arranged separately.
  • the first adapter piece 261 is used for connecting with the pole 23
  • the second adapter piece 262 is used for connecting with the pole ear 222 .
  • the first adapter piece 261 generally extends along the first direction Z
  • the second adapter piece 262 generally extends along the second direction X
  • the first adapter piece 261 and the second adapter piece 262 are connected by a conductive structure.
  • the adapter part 26 is set as a first adapter piece 261 and a second adapter piece 262 which are separately arranged, so that when assembling, the first adapter piece 261 can be connected to the pole 23 in advance, and the second adapter piece 261 can be connected to the pole 23 in advance.
  • the electrode assembly 22 is put into the casing 21, and at this time, the ends of the first adapter piece 261 and the second adapter piece 262 are passed through the conductive structure connection, thereby realizing the entry of the electrode assembly 22 into the case.
  • the end cover 24 is welded to the casing 21 to complete the sealing of the battery cell 20 .
  • first adapter piece 261 can also be connected with the tab, while the second adapter piece 262 is connected with the pole.
  • the extension direction of the first adapter piece 261 and the extension direction of the second adapter piece 262 are perpendicular to each other. In some other embodiments, the extension direction of the first adapter piece 261 intersects with the extension direction of the second adapter piece 262 and there is an included angle between the two extension directions.
  • the conductive structure includes a welding structure or a conductive adhesive bonding structure or a riveting structure or a conductive element.
  • the conductive connection through the welding structure means that the first adapter piece 261 and the second adapter piece 261 are connected by welding means such as laser welding.
  • the conductive connection through the conductive adhesive bonding structure refers to the use of conductive adhesive to bond the first adapter piece 261 and the second adapter piece 262.
  • the conductive adhesive can be a conductive adhesive film.
  • the conductive adhesive can not only realize the first adapter piece
  • the electrical connection between 261 and the second adapter piece 262 can also realize the mechanical connection between the two.
  • the conductive connection through the riveting structure means that the first adapter piece 261 and the second adapter piece 262 are connected to each other through rivets.
  • the first adapter piece 261 includes a first main body section 2611 and a first connecting section 2612 disposed at an end of the first main body section 2611 .
  • the first body section 2611 is used to connect with the pole 23 , the first body section 2611 extends along the first direction Z, the first connecting section 2612 extends along the second direction X, and the first connecting section 2612 and the second adapter piece 262 connect.
  • the first adapter piece 261 includes a first body section 2611 and a first connection section 2612 arranged at the end of the first body section 2611, the first connection section 2612 is used to connect with the second adapter piece 262, thus increasing the first The connection area between the adapter piece 261 and the second adapter piece 262 is convenient for connection.
  • the first connecting section 2612 is integrally formed with the first main body section 2611 , for example, the first connecting section 2612 is bent to one side relative to the first main body section 2611 by using a bending tool.
  • the first adapter piece 261 may also only include the first body section 2611 , and the first body section 2611 is directly connected to the second adapter piece 262 .
  • the second adapter piece 262 includes a second main body section 2621 and a second connecting section 2622 connected to the first connecting section 2612, the second main body section 2621 is used to connect the pole 23, wherein the second main body section 2621 A connecting section 2612 extends toward a side close to the second main section 2621 relative to the first main section 2611 .
  • the first connecting section 2612 extends toward a side away from the second main section 2621 relative to the first main section 2611 .
  • first connection section 2612 extends toward a side close to the second main body section 2621 relative to the first main body section 2611 .
  • first connecting section 2612 extends toward a side away from the second main section 2621 relative to the first main section 2611 .
  • the cross-sectional shape of the first adapter piece 261 in the two embodiments is both L-shaped, and the difference is that the direction in which the first connecting section 2612 extends relative to the first main body section 2611 is opposite.
  • the first connecting section 2612 extends toward both sides relative to the first main body section 2611 .
  • the cross-sectional shape of the first adapter piece 261 formed by the first connecting section 2612 and the first body section 2611 is T-shaped, which can further increase the connection area between the first connecting section 2612 and the second adapter piece 262 .
  • the first adapter piece 261 may also only include the first body section 2611 extending in the first direction Z.
  • the second adapter piece 262 includes a second body section 2621 extending in the second direction X and a second connection section 2622 connected to the first adapter piece 261 .
  • the second connection section 2622 can be bent relative to the second body section 2621 , for example, the second connection section 2622 extends along the first direction Z.
  • the present application also provides a battery cell, including a casing, a pole 23 , an electrode assembly 22 and the above-mentioned adapter part 26 .
  • the housing has an accommodating cavity, the electrode assembly 22 is accommodated in the accommodating cavity, the housing includes a housing 21 and an end cap 24, the housing 21 is integrally formed, and the housing 21 includes two first side walls 211 oppositely arranged in the second direction X As well as the two second side walls 212 oppositely arranged in the third direction Y, the two first side walls 211 and the two second side walls 212 enclose to form an accommodation chamber, the housing 21 is at least arranged in the first direction Z There is an opening 213, the first direction Z, the second direction X and the third direction Y are perpendicular to each other, and the electrode assembly 22 includes a main body 221 and a pole ear 222 protruding from the main body 221 to one side of the opening, and the pole ear 222 faces the opening 213 protrudes from one side,
  • the battery cell 20 includes two poles 23 .
  • the two poles 23 are respectively disposed on the two first side walls 211 .
  • the two tabs of the electrode assembly 22 are respectively a positive tab and a negative tab, and the positive tab and the negative tab are disposed on the same side of the main body 221 .
  • the battery cell 20 includes two transition parts 26 , and the positive tab and the negative tab are respectively connected to a corresponding pole 23 through one transition part 26 .
  • the battery cell 20 may also include more than two electrode assemblies.
  • the positive tabs of the two or more electrode assemblies may be connected to a corresponding pole 23 through an adapter part, and the two The negative tabs of the above electrode assemblies can also be connected to the corresponding other pole 23 through an adapter part.
  • the present application also provides a battery, including the battery cell of any one of the above schemes.
  • the present application also provides an electric device, including the battery of any one of the above schemes, and the battery is used to provide electric energy for the electric device.
  • the electric device may be any of the aforementioned devices or systems using batteries.
  • the present application also provides a method for manufacturing a battery cell, including the following steps:
  • the housing 21 has at least one opening 213 in the first direction Z and includes two first side walls 211 opposite in the second direction X and two second side walls 212 opposite in the third direction Y .
  • the two first side walls 211 and the two second side walls 212 enclose to form an accommodation cavity, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other.
  • the electrode assembly 22 includes a main body 221 and a tab 222 protruding from the main body 221 toward the side of the opening 213 .
  • the adapter component 26 includes a first adapter piece 261 and a second adapter piece 262 arranged separately. as well as
  • the pole 23 is arranged on the first side wall 211 of the integrally formed casing 21, so that the electrode assembly does not need to be connected with the end cover in advance when entering the case, so it is convenient to enter the case and simplifies the battery cell.
  • the adapter part 26 is set as a split first adapter piece 261 and a second adapter piece 262, so that when assembling, the first adapter piece 261 can be connected to the pole 23 in advance, and the second adapter piece 261 can be connected to the pole 23 in advance.
  • the electrode assembly 22 is put into the casing 21, and at this time, the ends of the first adapter piece 261 and the second adapter piece 262 are passed through the conductive structure connection, thereby realizing the entry of the electrode assembly 22 into the case.
  • the present application also provides a battery cell manufacturing equipment 30, the manufacturing equipment includes a first providing module 31, a second providing module 32, a third providing module 33 and an assembly Module 34.
  • the first providing module 31 is configured to provide the housing 21 , the pole 23 and the end cover 24 integrally formed.
  • the housing 21 has at least one opening 213 in the first direction Z and includes two first side walls 211 opposite in the second direction X and two second side walls 212 opposite in the third direction Y .
  • the two first side walls 211 and the two second side walls 212 enclose to form an accommodation cavity, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other.
  • the second providing module 32 is configured to provide the electrode assembly 22 , and the electrode assembly 22 includes a main body 221 and a tab 222 extending outward from the main body 221 .
  • the third providing module 33 is configured to provide the adapter part 26 , and the adapter part 26 includes a first adapter piece 261 and a second adapter piece 262 arranged separately.
  • the assembly module 34 is configured to install the pole 23 on the first side wall 211 and connect the first adapter 261 to the pole 23, connect the second adapter 262 to the tab 222, and place the electrode assembly 22 In the accommodating chamber, the first adapter piece 261 and the second adapter piece 262 are conductively connected, and the end cap 24 is disposed at the opening to close the accommodating chamber.
  • the manufacturing equipment of the battery cell sets the pole 23 on the first side wall 211 of the integrally formed casing 21, so that the electrode assembly does not need to be connected with the end cover in advance when entering the case, so it is convenient to enter the case and simplifies the battery life. Body assembly process.
  • the battery cell 20 includes a casing 21 , an end cover 24 and two poles 23 disposed on the casing 21 .
  • the height direction of the battery cell 20 extends along the first direction Z, the length direction extends along the second direction X, and the thickness direction extends along the third direction Y.
  • the housing 21 includes two opposite first side walls 211 , two opposite second side walls 212 , a bottom wall and an opening 213 opposite to the bottom wall.
  • the battery cell 20 further includes an electrode assembly 22 disposed in the casing 21 and an adapter part 26 for connecting the electrode assembly 22 and the pole 23 .
  • the electrode assembly 22 includes a main body 221 and two tabs 222 extending from the main body 221 to one side of the opening. The polarities of the two tabs 222 are opposite, one is a positive tab and the other is a negative tab. Each tab 222 is connected to the corresponding pole 23 through an adapter part 26 .
  • the adapter component 26 includes a first adapter piece 261 and a second adapter piece 262 arranged separately.
  • the first adapter piece 261 and the second adapter piece 262 are arranged perpendicular to each other, the first adapter piece 261 is arranged on the inner side of the first side wall 211 of the housing 21 and is connected with the pole 23, and the second adapter piece 262 is arranged It is on the inner side of the end cover 24 and connected with the tab 222 .
  • the pole 23 includes an inner pole 231 , an outer pole 232 , a sealing sleeve 233 , a sealing ring 234 , a first insulating sheet 235 and a second insulating sheet 236 .
  • the inner pole 231 includes a pole body disposed in the pole installation hole 211 a and a connecting piece for connecting with the first adapter piece 261 .
  • the connecting piece is connected to the end of the pole body.
  • the sealing sleeve 233 is sleeved on the outer side of the inner pole 231 to isolate the first side wall 211 from the inner pole 231 .
  • the sealing ring 234 is pressed against the outer wall of the sealing sleeve 233 so that the inner wall of the sealing sleeve 233 is in contact with the outer wall of the inner pole post 231.
  • a first insulating sheet 235 is provided between the connecting piece of the inner pole 231 and the inner wall surface of the first side wall 211 of the housing 21 .
  • the first insulating sheet 235 extends along the first direction Z and extends to a position close to the end cover 24 . In this way, the first insulating sheet 235 can not only prevent the conductive connection between the inner pole 23 and the casing 21 , but also prevent the conductive connection between the first adapter sheet 261 and the casing.
  • the pole body passes through the pole installation hole 211 a of the first side wall 211 and is partially exposed outside the first side wall 211 .
  • the outer pole 232 is a pole ring with an inner hole.
  • the outer pole 232 is sleeved on the outer side of the inner pole 231 .
  • a second insulating sheet 236 is disposed between the outer pole 232 and the outer surface of the first side wall 211 of the casing 21 .
  • the second insulating sheet 236 has a groove for locking the outer pole 232 .
  • the adapter component 26 includes a first adapter piece 261 and a second adapter piece 262 arranged separately.
  • the first adapter piece 261 is used for connecting with the pole 23
  • the second adapter piece 262 is used for connecting with the pole ear 222 .
  • the first adapter piece 261 includes a first body section 2611 extending in the first direction Z and a first connecting section 2612 extending in the second direction X.
  • the second adapter piece 262 includes a second body section 2621 and a second connection section 2622 both extending in the second direction X.
  • the first body section 2611 is connected to the pole 23
  • the first connection section 2612 is connected to the second adapter piece 262 .
  • the manufacturing method of the battery cell 20 in this embodiment includes: providing an integrally formed casing 21, two poles 23, an electrode assembly 22, two adapter parts 26 and an end cover 24, and assembling the two poles 23 respectively On the two first side walls 211 of the housing 21, the two first adapter pieces 261 of the two adapter parts 26 are respectively connected (for example, welded) to the two poles 23, specifically, the first adapter The tab 261 is connected to the inner pole 231 .
  • the second adapter pieces 262 of the two adapter parts 26 are respectively welded to the two tabs 222 (such as ultrasonic welding or laser welding), and then the electrode assembly 22 welded with the second adapter pieces 262 is placed in the casing 21 and electrically connect the two first adapter pieces 261 to the ends of the two second adapter pieces 262 respectively, so as to complete the electrically conductive connection between one pole 23 and one pole ear 222 .
  • the connection mode of another pole 23 and another pole ear 222 also adopts the same way.
  • the end cap 24 is welded to the casing 21 to seal the battery cell 20 .
  • Insulation treatment is also required between the electrode assembly 22 and the casing 21 , which can be wrapped with an insulating film or blue film made of Mylar.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本申请提供一种转接部件、电池单体、电池、用电装置以及电池单体的制造方法和制造设备。转接部件包括分体设置的第一转接片和第二转接片，第一转接片用于与极柱或极耳中的一者连接，第二转接片用于与极柱或极耳中的另一者连接，第一转接片大体上沿第一方向延伸，第二转接片大体上沿第二方向延伸，第一方向和第二方向相交，第一转接片和第二转接片之间通过导电结构连接。本申请将转接部件设置为分体的第一转接片和第二转接片，这样在装配时，可预先将第一转接片与极柱连接，并在将第二转接片与电极组件的极耳连接后，将电极组件放入到壳体内，此时再将第一转接片和第二转接片的端部通过导电结构连接，进而实现电极组件的入壳。

Description

转接部件、电池单体、电池、用电装置以及电池单体的制造方法和制造设备 技术领域
本申请涉及电池技术领域，特别是涉及一种转接部件、电池单体、电池、用电装置以及电池单体的制造方法和制造设备。
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。
电池单体包括壳体、端盖和设置在壳体内的电极组件，端盖上设置有极柱。在电池单体的组装工序中，需要将电极组件放入壳体内并将电极组件与端盖上的极柱连接，再将端盖与壳体焊接来完成组装，可见上述电池单体的组装工序复杂。
发明内容
鉴于上述问题，本申请提供一种转接部件、电池单体、电池、用电装置以及电池单体的制造方法和制造设备，以简化电池单体的组装。
第一方面，本申请提供一种用于电池单体的转接部件，转接部件包括分体设置的第一转接片和第二转接片，第一转接片用于与极柱或极耳中的一者连接，第二转接片用于与极柱或极耳中的另一者连接，第一转接片大体上沿第一方向延伸，第二转接片大体上沿第二方向延伸，第一方向和第二方向相交，第一转接片和第二转接片之间通过导电结构连接。
本申请实施例的技术方案中，将转接部件设置为分体的第一转接片和第二转接片，这样在装配时，可预先将第一转接片与极柱连接，并在将第二转接片与电极组件的极耳连接后，将电极组件放入到壳体内，此时再将第一转接片和第二转接片的端部通过导电结构连接，进而实现电极组件的入壳。
在一些实施例中，第一转接片包括第一主体段和设置在第一主体段端部的第一连接段，第一主体段用于连接极柱或极耳中的一者；第一主体段沿第一方向延伸，第一连接段沿第二方向延伸，且第一连接段与第二转接片连接。第一连接段的设置可以增大第一转接片与第二转接片之间的连接面积，方便连接。
在一些实施例中，第二转接片包括第二主体段以及与第一连接段连接的第二连接段，第二主体段用于连接极柱或极耳中的另一者，其中，第一连接段相对于第一主体段朝靠近第二主体段一侧延伸；或者，第一连接段相对于第一主体段朝远离第二主体段一侧延伸；或者，在第二方向上，第一连接段相对于第一主体段朝两侧延伸。
在一些实施例中，第一连接段和第一主体段一体成型。
导电结构包括焊接结构、导电胶粘接结构、铆接结构或者导电元件。
第二方面，本申请提供一种电池单体，包括外壳、极柱、电极组件和上述转接部件，外壳具有容纳腔，电极组件容纳在容纳腔内，外壳包括壳体以及端盖，壳体一体成型，壳体包括在第二方向上相对设置的两个第一侧壁以及在第三方向上相对设置的两个第二侧壁，两个第一侧壁和两个第二侧壁围合形成容纳腔，壳体至少在第一方向上设有开口，第一方向、第二方向和第三方向相互垂直，且电极组件包括主体部和从主体部向开口一侧伸出的极耳，极柱设置在第一侧壁上，端盖设置在开口处以封闭容纳 腔；第一转接片与极柱连接，第二转接片与极耳连接。
在一些实施例中，极柱为两个，两个极柱分别设置在两个第一侧壁上。
在一些实施例中，极耳包括正极耳和负极耳，正极耳和负极耳设置在主体部的同一侧。
在一些实施例中，极柱铆接或注塑在第一侧壁上。
第三方面，本申请提供一种电池，包括上述电池单体。
第四方面，本申请提供一种用电装置，包括上述电池。
第五方面，本申请提供一种电池单体的制造方法，包括如下步骤：提供一体成型的壳体、极柱和端盖，壳体具有至少一个在第一方向上的开口且包括在第二方向上相对设置的两个第一侧壁以及在第三方向上相对设置的两个第二侧壁，两个第一侧壁和两个第二侧壁围合形成容纳腔，第一方向、第二方向和第三方向相互垂直；
提供电极组件，电极组件包括主体部和从主体部朝开口一侧伸出的极耳；以及
提供转接部件，转接部件包括分体设置的第一转接片和第二转接片，将极柱设置在第一侧壁上并将第一转接片与极柱连接，将第二转接片与极耳连接并将电极组件放入壳体内，将第一转接片和第二转接片导电连接，并将端盖设置在开口处以封闭容纳腔。
第六方面，本申请提供一种电池单体的制造设备，包括：
第一提供模块，被配置为提供一体成型的壳体、极柱和端盖，壳体包括在第二方向上相对设置的两个第一侧壁以及在第三方向上相对设置的两个第二侧壁，两个第一侧壁和两个第二侧壁围合形成容纳腔，壳体具有至少一个在第一方向上的开口；
第二提供模块，被配置为提供电极组件，电极组件包括主体部和从主 体部向外伸出的极耳；
第三提供模块，被配置为提供转接部件，转接部件包括分体设置的第一转接片和第二转接片；以及
组装模块，被配置为将极柱安装在第一侧壁上且将第一转接片与极柱连接，将第二转接片与极耳连接，并将电极组件放置在容纳腔内，且将第一转接片和第二转接片导电连接，并将端盖设置在开口处以封闭容纳腔。
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，下壁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，下壁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的车辆的结构示意图；
图2是本申请一些实施例的电池的分解结构示意图；
图3是本申请一些实施例的电池单体的立体结构示意图；
图4是本申请一些实施例的电池单体的壳体的立体结构示意图；
图5是本申请一些实施例的电池单体的俯视结构示意图；
图6为图5所示电池单体的沿A-A方向的剖视结构示意图；
图7为图6中M部分的局部放大结构示意图；
图8为图6中N部分的局部放大结构示意图；
图9为本申请一些实施例的转接部件的立体结构示意图；
图10为图9所示的转接部件的主视结构示意图；
图11为本申请一些实施例的电池单体的制造方法的步骤原理图；
图12为本申请一些实施例的电池单体的制造设备的结构图。
在附图中，附图并未按照实际的比例绘制。
标记说明：
车辆1000；
电池100，控制器200，马达300；
箱体10，第一部分11，第二部分12；
电池单体20，壳体21，第一侧壁211，极柱安装孔211a，第二侧壁212，开口213，电极组件22，主体部221，极耳222，极柱23，内极柱231；外极柱232；绝缘套筒233；密封圈234；第一绝缘片235；第二绝缘片236；端盖24，转接部件26，第一转接片261，第一主体段2611，第一连接段2612，第二转接片262，第二主体段2621，第二连接段2622；
电池单体的制造设备30，第一提供模块31，第二提供模块32，第三提供模块33，组装模块34。
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。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
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(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
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，或成一体；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。
目前的电池单体通常包括壳体、端盖和容纳在壳体内的电极组件，并在壳体内填充电解质。电极组件是电池单体中发生电化学反应的部件，壳体是形成电池单体的内部环境的组件，端盖是盖合于壳体的开口处以将电池单体的内部环境隔绝于外部环境的部件。现有的一些电池单体一般将正负极柱设置在同一个端盖上，而且极柱的设置方向与电极组件的极耳的伸出方向相同。这样设计使得电池单体之间的正负极连接方式只能在同侧连接。为了解决这一问题，现有的另一些电池单体的壳体具有在长度方向上相对设置的两个开口以及分别设置在两个开口上的端盖，正负极柱分别设置在两个端盖上。本申请的发明人研究发现，在这些电池单体的装配过程中，电极组件需要从一个开口进入壳体内并移动至另一个开口处，使得电极组件在入壳时的移动行程较长。而且在入壳前，需要先将电极组件的极耳与一个端盖上的极柱连接，然后将电极组件放入壳体内后才能将该端盖与壳体进行焊接，因此装配工序复杂且难度较高。
为了改善以上电池单体装配复杂的问题，发明人研究发现可以使电池单体包括一体成型的壳体，并且将两个极柱集成装配在壳体的两个相对的侧壁上，这样电极组件在入壳时无需事先与端盖连接，因此入壳方便，简化了电池单体的装配工序。
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装置中。可以使用具备本申请公开的电池单体、电池等组成该用电装置的电源系统。
本申请实施例提供一种使用电池作为电源的用电装置，用电装置可以为但不限于手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。其中，电动玩具可以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，航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。
以下实施例为了方便说明，以本申请一实施例的一种用电装置为车辆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，控制器200用于控制电池100为马达300供电，例如，用于车辆1000的启动、导航或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包括箱体10和电池单体20。电池单体20容纳于箱体10内。其中，箱体10用于为电池单体20提供容纳空间，箱体10可以采用多种结构。在一些实施例中，箱体10可以包括第一部分11和第二部分12，第一部分11与第二部分12相互盖合，第一部分11和第二部分12共同限定出用于容纳电池单体20的容纳空间。第二部分12可以为一端开口的空心结构，第一部分11可以为板状结构，第一部分11盖合于第二部分12的开 口侧，以使第一部分11和第二部分12共同限定出容纳空间。第一部分11和第二部分12也可以是均为一侧开口的空心结构，第一部分11的开口侧盖合于第二部分12的开口侧。当然，第一部分11和第二部分12形成的箱体10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构成的整体容纳于箱体10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，并容纳于箱体10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，每个电池单体20可以为二次电池或一次电池；还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。电池单体20可呈圆柱体、扁平体、长方体或其它形状等。
请参照图3，图3为本申请一些实施例提供的电池单体20的立体结构示意图。如图3并参考图5，电池单体20包括壳体21、电极组件22、极柱23及其他的功能性部件。
壳体21是形成电池单体20的内部环境的组件，其中，形成的内部环境可以用于容纳电极组件22、电解液以及其他部件。壳体21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21的形状可以根据电极组件22的具体形状和尺寸大小来确定。壳体21的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。
电极组件22是电池单体20中发生电化学反应的部件。壳体21内 可以包含一个或更多个电极组件22。电极组件22主要由正极片和负极片卷绕或层叠放置形成，并且通常在正极片与负极片之间设有隔膜。正极片和负极片具有活性物质的部分构成电极组件的主体部221，正极片和负极片不具有活性物质的部分各自构成极耳222。在电池的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极柱23用于与电极组件22电连接，以用于输出或输入电池单体20的电能。
端盖24是指盖合于壳体21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24的形状可以与壳体21的形状相适应以配合壳体21。可选地，端盖24可以由具有一定硬度和强度的材质(如铝合金)制成，这样，端盖24在受挤压碰撞时就不易发生形变，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24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，端盖24的材质也可以是多种的，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。
参考图3至图6，图3示出本申请一些实施例的电池单体的立体结构示意图，图4示出本申请一些实施例的电池单体的壳体的立体结构示意图。图5示出本申请一些实施例的电池单体的俯视结构示意图。图6示出图5中电池单体的沿A-A方向的剖视结构示意图。电池单体20包括壳体21、电极组件22和两个极柱23。壳体21一体成型且包括至少一个在第一方向Z上的开口、在第二方向X上相对设置的两个第一侧壁211以及在第三方向Y上相对设置的两个第二侧壁212，两个第一侧壁211和两个第二侧壁212围合形成容纳腔。第一方向Z、第二方向X和第三方向Y相互垂直。电极组件22容纳在容纳腔内，且电极组件22包括主体部221和从主体部221向外伸出的极性相反的两个极耳222。两个极柱23分别设置在两 个第一侧壁211上且分别与两个极耳222电连接。
如图3所示，图中第一方向Z为电池单体20的高度方向，第二方向X为电池单体20的长度方向，第三方向Y为电池单体20的厚度方向。以上所说的第一侧壁211在第二方向X上设置指的是第一侧壁211处在第二方向X的延伸方向上且第一侧壁211与第二方向X垂直。同样的，第二侧壁212在第三方向Y上设置指的是第二侧壁212处在第三方向Y的延伸方向上且第二侧壁212与第三方向Y垂直。开口213在第一方向Z上指的是壳体21在第一方向Z上的至少一个面是开放设置的。
如图4所示，壳体21的第一侧壁211上设置有极柱安装孔211a，极柱23安装在极柱安装孔211a处。如图5和图6所示，电极组件22的两个极耳222均从主体部221的同一侧伸出。在其他实施例中，电极组件22的两个极耳222也可以分别从主体部221的不同侧伸出，例如，参考图6，两个极耳222可分别从主体部221的左右两端伸出，这样也可方便极耳222与极柱23的连接，例如可通过穿透焊等方式实现极柱23与极耳222之间的连接。
两个极柱23分别设置在一体成型的壳体21的两个第一侧壁211上，这样电极组件22在入壳时，其需要移动的行程是壳体21的宽度方向，行程缩短，方便入壳。并且将两个极柱集成装配在壳体的两个相对的侧壁上，这样电极组件在入壳时无需事先与端盖连接，因此入壳方便，简化了电池单体的装配工序。另外，电池单体20的两个极柱设置在两个第一侧壁211上，这样使得电池单体20的上下两侧均可以布置水冷件，扩大了水冷件布置的面积，提高电池的散热性能。
在一些实施例中，壳体21通过挤铝或者拉伸工艺实现一体化成型。
根据本申请的一些实施例，壳体21还包括与开口213相对设置的 底壁。电池单体20还包括端盖24，端盖24设置在开口213处以封闭容纳腔。
如图4所示，第一侧壁211的面积小于第二侧壁212的面积，这样该壳体21包括五个面，两个大面(第二侧壁212)，两个小面(第一侧壁211)以及底面。极柱23直接装配在壳体21的两个小面也就是第一侧壁211上。这样在将电极组件22放置在壳体21内后，只需要将一个端盖24与壳体21焊接即可封闭壳体21，与现有技术中需要焊接两个端盖相比，简化了电池单体的装配流程。
根据本申请的一些实施例，壳体21具有在第一方向Z上相对设置的两个开口213，电池单体20还包括两个端盖24，两个端盖24对应设置在两个开口213处以封闭容纳腔。
此时壳体21具有四个面，两个大面和两个小面，其在第一方向Z上是上下贯通的，具有分别位于第一方向Z上的两个开口。该壳体21在第一方向Z上是贯通的，因此可通过一次拉伸成型，拉伸成型的过程简单。
根据本申请的一些实施例，第一侧壁211的面积小于第二侧壁212的面积。这样设置使得壳体21的第二侧壁212与电极组件22的大面同方向设置，壳体21的第一侧壁211与电极组件22的厚度方向同方向设置，进而方便电极组件22的入壳。
根据本申请的一些实施例，极柱23铆接或注塑在第一侧壁211上。如图4所示，第一侧壁211上设置有极柱安装孔211a，在电极组件23入壳前，极柱23已经通过铆接或注塑的方式直接装配在两个第一侧壁211的极柱安装孔211a内。
参考图8，极柱23包括内极柱231、外极柱232、密封套筒233、密封圈234、第一绝缘片235以及第二绝缘片236。内极柱231穿过第一 侧壁211的极柱安装孔211a并部分露出在第一侧壁211的外侧，外极柱232套设在内极柱231的外侧。密封套筒233套设在内极柱231的外侧以隔离第一侧壁211与内极柱231。密封圈234压靠在密封套筒233的外壁以使得密封套筒233的内壁与内极柱231的外壁接触，图中示出的是装配过程中两者未接触的状态，但是在装配完成后密封套筒233的内壁与内极柱231的外壁是相互接触的。为了避免极柱23与壳体21导电连接，在内极柱231与壳体21的第一侧壁211的内壁面之间设置有第一绝缘片235。且内极柱231的两侧均设置有第一绝缘片235。在外极柱232与壳体21的第一侧壁211的外壁面之间设置有第二绝缘片236。第二绝缘片236具有用于卡设外极柱232的凹槽。
密封圈234可以采用氟橡胶。
如图6所示，两个极耳222从主体部221向开口213一侧伸出。而极柱23是设置在壳体21的第一侧壁221上，也就是说极耳222和极柱23的伸出方向是不一致的，因此极耳222和极柱23之间需要通过转接部件26连接。发明人在研究中发现若采用一体式的转接部件26来连接极耳222和极柱23，则无法实现电池单体20的装配。例如先将转接部件26与极耳222连接，然后将连接有转接部件26的电极组件22放到壳体21内，此时将没有多余的空间来焊接转接部件26和极柱23。再例如先将转接部件26与极柱23焊接，那么转接部件26对电极组件22的入壳形成了阻挡，导致电极组件22无法入壳。
针对该问题，本申请的发明人提出将转接部件26设置为分体设置的第一转接片261和第二转接片262。第一转接片261用于与极柱或极耳中的一者连接，第二转接片262用于与极柱23或极耳222中的另一者连接，第一转接片261大体上沿第一方向Z延伸，第二转接片262大体上沿第二方向X延伸，第一方向Z和第二方向X相交，第一转接片261和第 二转接片262之间通过导电结构连接。
如图6所示，两个极耳222从主体部221向开口213一侧伸出。电池单体20还包括转接部件26。转接部件26包括分体设置的第一转接片261和第二转接片262。第一转接片261用于与极柱23连接，第二转接片262用于与极耳222连接。第一转接片261大体上沿第一方向Z延伸，第二转接片262大体上沿第二方向X延伸，第一转接片261和第二转接片262之间通过导电结构连接。
将转接部件26设置为分体设置的第一转接片261和第二转接片262，这样在装配时，可预先将第一转接片261与极柱23连接，并在将第二转接片262与电极组件22的极耳222连接后，将电极组件22放入到壳体21内，此时再将第一转接片261和第二转接片262的端部通过导电结构连接，进而实现电极组件22的入壳。在第一转接片261和第二转接片262的端部通过导电结构连接以后，再将端盖24与壳体21焊接进而完成电池单体20的密封。
在其他实施例中，第一转接片261也可以与极耳连接，而第二转接片262与极柱连接。
在一些实施例中，第一转接片261的延伸方向和第二转接片262的延伸方向相互垂直。在另一些实施例中，第一转接片261的延伸方向和第二转接片262的延伸方向相交且两个延伸方向之间具有夹角。
根据本申请的一些实施例，导电结构包括焊接结构或者导电胶粘接结构或者铆接结构或者导电元件。通过焊接结构导电连接指的是第一转接片261和第二转接片261通过激光焊接等焊接手段将两者连接。通过导电胶粘接结构导电连接指的是利用导电胶将第一转接片261和第二转接片262粘接，导电胶可以是导电胶膜，该导电胶不仅能够实现第一转接片261和第二转接片262之间的电连接，还能够实现两者之间的机械连接。 通过铆接结构导电连接指的是第一转接片261和第二转接片262通过铆钉相互连接。
根据本申请的一些实施例，如图9所示，第一转接片261包括第一主体段2611和设置在第一主体段2611端部的第一连接段2612。第一主体段2611用于与极柱23连接，第一主体段2611沿第一方向Z延伸，第一连接段2612沿第二方向X延伸，且第一连接段2612与第二转接片262连接。
第一转接片261包括第一主体段2611和设置在第一主体段2611端部的第一连接段2612，第一连接段2612用于与第二转接片262连接，这样增大第一转接片261与第二转接片262之间的连接面积，方便连接。
第一连接段2612与第一主体段2611一体成型，例如通过折弯工具将第一连接段2612相对于第一主体段2611向一侧折弯形成。
当然在其他实施例中，第一转接片261也可以仅包括第一主体段2611，第一主体段2611直接与第二转接片262连接。
根据本申请的一些实施例，第二转接片262包括第二主体段2621以及与第一连接段2612连接的第二连接段2622，第二主体段2621用于连接极柱23，其中，第一连接段2612相对于第一主体段2611朝靠近第二主体段2621一侧延伸。或者，第一连接段2612相对于第一主体段2611朝远离第二主体段2621一侧延伸。
在一个可能的实施例中，第一连接段2612相对于第一主体段2611朝靠近第二主体段2621一侧延伸。在另一个可能的实施例中，第一连接段2612相对于第一主体段2611朝远离第二主体段2621一侧延伸。该两个实施例中的第一转接片261的截面形状均为L型，区别在于第一连接段2612相对于第一主体段2611延伸的方向是相反的。
根据本申请的一些实施例，在第二方向X上，第一连接段2612相 对于第一主体段2611朝两侧延伸。此时第一连接段2612和第一主体段2611形成的第一转接片261的截面形状为T型，这样可进一步增大第一连接段2612与第二转接片262之间的连接面积。
在其他实施例中，第一转接片261也可以仅包括在第一方向Z上延伸设置的第一主体段2611。第二转接片262包括在第二方向X上延伸的第二主体段2621以及与第一转接片261连接的第二连接段2622。第二连接段2622可以相对于第二主体段2621弯折设置，例如第二连接段2622沿第一方向Z延伸。
根据本申请的一些实施例，本申请还提供了一种电池单体，包括外壳、极柱23、电极组件22和上述转接部件26。外壳具有容纳腔，电极组件22容纳在容纳腔内，外壳包括壳体21以及端盖24，壳体21一体成型，壳体21包括在第二方向X上相对设置的两个第一侧壁211以及在第三方向Y上相对设置的两个第二侧壁212，两个第一侧壁211和两个第二侧壁212围合形成容纳腔，壳体21至少在第一方向Z上设有开口213，第一方向Z、第二方向X和第三方向Y相互垂直，且电极组件22包括主体部221和从主体部221向开口一侧伸出的极耳222，极耳222朝开口213一侧伸出，极柱23设置在第一侧壁211上，端盖24设置在开口处以封闭容纳腔；第一转接片261与极柱23连接，第二转接片262与极耳222连接。
根据本申请的一些实施例，电池单体20包括两个极柱23。两个极柱23分别设置在两个第一侧壁211上。且电极组件22的两个极耳分别为正极耳和负极耳，正极耳和负极耳设置在主体部221的同一侧。此时，电池单体20包括两个转接部件26，正极耳和负极耳均分别通过一个转接部件26与相应的一个极柱23连接。
在其他一些实施例中，电池单体20也可以包括两个以上的电极组 件，此时两个以上的电极组件的正极耳可以均通过一个转接部件与相应的一个极柱23连接，两个以上的电极组件的负极耳也可以均通过一个转接部件与相应的另一个极柱23连接。
根据本申请的一些实施例，本申请还提供了一种电池，包括以上任一方案的电池单体。
根据本申请的一些实施例，本申请还提供了一种用电装置，包括以上任一方案的电池，并且电池用于为用电装置提供电能。
用电装置可以是前述任一应用电池的设备或系统。
参考图11，根据本申请的一些实施例，本申请还提供了一种电池单体的制造方法，包括如下步骤：
S101，提供一体成型的壳体21、极柱23和端盖24。壳体21具有至少一个在第一方向Z上的开口213且包括在第二方向X上相对设置的两个第一侧壁211以及在第三方向Y上相对设置的两个第二侧壁212。两个第一侧壁211和两个第二侧壁212围合形成容纳腔，第一方向Z、第二方向X和第三方向Y相互垂直。
S102，提供电极组件22，电极组件22包括主体部221和从主体部221朝开口213一侧伸出的极耳222。
S103，提供转接部件26，转接部件26包括分体设置的第一转接片261和第二转接片262。以及
S104，将极柱23设置在第一侧壁211上，并将第一转接片261与极柱23连接，将第二转接片262与极耳222连接并将电极组件22放入壳体21内，将第一转接片261和第二转接片262导电连接，并将端盖24设置在开口处以封闭容纳腔。
该电池单体的制造方法将极柱23设置在一体成型的壳体21的第一侧壁211上，这样电极组件在入壳时无需事先与端盖连接，因此入壳方 便，简化了电池单体的装配工序。而且将转接部件26设置为分体的第一转接片261和第二转接片262，这样在装配时，可预先将第一转接片261与极柱23连接，并在将第二转接片262与电极组件22的极耳222连接后，将电极组件22放入到壳体21内，此时再将第一转接片261和第二转接片262的端部通过导电结构连接，进而实现电极组件22的入壳。
在此需要说明的是在以上各个步骤之间可以再增加其他步骤。
参考图12，根据本申请的一些实施例，本申请还提供了一种电池单体的制造设备30，该制造设备包括第一提供模块31、第二提供模块32、第三提供模块33和组装模块34。
其中，第一提供模块31被配置为提供一体成型的壳体21、极柱23和端盖24。壳体21具有至少一个在第一方向Z上的开口213且包括在第二方向X上相对设置的两个第一侧壁211以及在第三方向Y上相对设置的两个第二侧壁212。两个第一侧壁211和两个第二侧壁212围合形成容纳腔，第一方向Z、第二方向X和第三方向Y相互垂直。
第二提供模块32被配置为提供电极组件22，电极组件22包括主体部221和从主体部221向外伸出的极耳222。
第三提供模块33被配置为提供转接部件26，转接部件26包括分体设置的第一转接片261和第二转接片262。
组装模块34配置为将极柱23安装在第一侧壁211上且将第一转接片261与极柱23连接，将第二转接片262与极耳222连接，并将电极组件22放置在容纳腔内，且将第一转接片261和第二转接片262导电连接，并将端盖24设置在开口处以封闭容纳腔。
该电池单体的制造设备将极柱23设置在一体成型的壳体21的第一侧壁211上，这样电极组件在入壳时无需事先与端盖连接，因此入壳方便，简化了电池单体的装配工序。
下面根据图3至图10对本申请具体实施例的电池单体的结构进行详细说明。
如图3所示，电池单体20包括壳体21、端盖24和设置在壳体21上的两个极柱23。电池单体20的高度方向沿第一方向Z延伸，长度方向沿第二方向X延伸，厚度方向沿第三方向Y延伸。
如图4所示，壳体21包括两个相对设置的第一侧壁211、两个相对设置的第二侧壁212、底壁以及与底壁相对设置的开口213。
如图5和图6所示，电池单体20还包括设置于壳体21内的电极组件22以及用于连接电极组件22和极柱23的转接部件26。电极组件22包括主体部221和从主体部221向开口一侧伸出的两个极耳222。两个极耳222的极性相反，一个是正极耳，另一个是负极耳。每个极耳222均通过转接部件26与对应的极柱23连接。
如图7所示，转接部件26包括分体设置的第一转接片261和第二转接片262。第一转接片261和第二转接片262相互垂直设置，第一转接片261设置在壳体21的第一侧壁211的内侧并与极柱23连接，第二转接片262设置在端盖24的内侧并与极耳222连接。
如图8所示，极柱23包括内极柱231、外极柱232、密封套筒233、密封圈234、第一绝缘片235以及第二绝缘片236。
内极柱231包括设置在极柱安装孔211a内的极柱体以及用于与第一转接片261连接的连接片。连接片连接在极柱体的端部。密封套筒233套设在内极柱231的外侧以隔离第一侧壁211与内极柱231。密封圈234压靠在密封套筒233的外壁以使得密封套筒233的内壁与内极柱231的外壁接触，图中示出的是装配过程中两者未接触的状态，但是在装配完成后密封套筒233的内壁与内极柱231的外壁是相互接触的。为了避免极柱23与壳体21导电连接，在内极柱231的连接片与壳体21的第一侧壁 211的内壁面之间设置有第一绝缘片235。第一绝缘片235沿第一方向Z延伸，并延伸到靠近端盖24的位置。这样使得第一绝缘片235不仅可防止内极柱23与壳体21之间导电连接，也可防止第一转接片261与壳体之间导电连接。
如图8所示，极柱体穿过第一侧壁211的极柱安装孔211a并部分露出在第一侧壁211的外侧。外极柱232为具有内孔的极柱环。外极柱232套设在内极柱231的外侧。在外极柱232与壳体21的第一侧壁211的外壁面之间设置有第二绝缘片236。第二绝缘片236具有用于卡设外极柱232的凹槽。
如图9和图10所示，转接部件26包括分体设置的第一转接片261和第二转接片262。第一转接片261用于与极柱23连接，第二转接片262用于与极耳222连接。第一转接片261包括在第一方向Z上延伸的第一主体段2611和在第二方向X上延伸的第一连接段2612。第二转接片262包括均在第二方向X上延伸设置的第二主体段2621和第二连接段2622。第一主体段2611与极柱23连接，第一连接段2612与第二转接片262连接。
本实施例的电池单体20的制造方法包括：提供一体成型的壳体21、两个极柱23、电极组件22、两个转接部件26和端盖24，将两个极柱23分别装配在壳体21的两个第一侧壁211上，将两个转接部件26的两个第一转接片261分别与两个极柱23连接(例如焊接)，具体地，将第一转接片261与内极柱231连接。将两个转接部件26的第二转接片262分别与两个极耳222焊接(例如超声波焊接或者激光焊接)，然后将焊接有第二转接片262的电极组件22放置到壳体21内，并将两个第一转接片261分别和两个第二转接片262的端部导电连接，进而完成一个极柱23和一个极耳222的导电连接。另一个极柱23和另一个极耳222的连接方式也采 用同样方式。最后将端盖24与壳体21焊接以使电池单体20密封。
电极组件22和壳体21之间还需要进行绝缘处理，可以使用迈拉(Mylar)制成的绝缘膜或蓝膜包裹。
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 (13)

  1. 一种用于电池单体的转接部件，包括分体设置的第一转接片(261)和第二转接片(262)，所述第一转接片(261)用于与极柱或极耳中的一者连接，所述第二转接片(262)用于与极柱(23)或极耳(222)中的另一者连接，所述第一转接片(261)大体上沿第一方向(Z)延伸，所述第二转接片(262)大体上沿第二方向(X)延伸，所述第一方向(Z)和所述第二方向(X)相交，所述第一转接片(261)和所述第二转接片(262)之间通过导电结构连接。
  2. 根据权利要求1所述的用于电池单体的转接部件，其中，所述第一转接片(261)包括第一主体段(2611)和设置在所述第一主体段(2611)端部的第一连接段(2612)，所述第一主体段(2611)用于连接所述极柱(23)或极耳(222)中的一者；所述第一主体段(2611)沿所述第一方向(Z)延伸，所述第一连接段(2612)沿所述第二方向(X)延伸，且所述第一连接段(2612)与所述第二转接片(262)连接。
  3. 根据权利要求2所述的用于电池单体的转接部件，其中，所述第二转接片(262)包括第二主体段(2621)以及与所述第一连接段(2612)连接的第二连接段(2622)，所述第二主体段(2621)用于连接所述极柱(23)或极耳(222)中的另一者，其中，所述第一连接段(2612)相对于所述第一主体段(2611)朝靠近所述第二主体段(2621)一侧延伸；或者，所述第一连接段(2612)相对于所述第一主体段(2611)朝远离所述第二主体段(2621)一侧延伸；或者，在所述第二方向(X)上，所述第一连接段(2612)相对于所述第一主体段(2611)朝两侧延伸。
  4. 根据权利要求2或3所述的用于电池单体的转接部件，其中，所述第一连接段(2612)和所述第一主体段(2611)一体成型。
  5. 根据权利要求1所述的用于电池单体的转接部件，其中，所述导电结构包括焊接结构、导电胶粘接结构、铆接结构或者导电元件。
  6. 一种电池单体，包括外壳、极柱(23)、电极组件(22)和如权利要求1至5中任一项所述的转接部件，所述外壳具有容纳腔，所述电极组件(22)容纳在所述容纳腔内，所述外壳包括壳体(21)以及端盖(24)，所述壳体(21)一体成型，所述壳体(21)包括在第二方向(X)上相对设置的两个第一侧壁(211)以及在第三方向(Y)上相对设置的两个第二侧壁(212)，所述两个第一侧壁(211)和所述两个第二侧壁(212)围合形成所述容纳腔，所述壳体(21)至少在第一方向(Z)上设有开口(213)，所述第一方向(Z)、所述第二方向(X)和所述第三方向(Y)相互垂直，且所述电极组件(22)包括主体部(221)和从所述主体部(221)向开口一侧伸出的极耳(222)，所述极柱(23)设置在所述第一侧壁(211)上，所述端盖(24)设置在所述开口处以封闭所述容纳腔；所述第一转接片(261)与所述极柱(23)连接，所述第二转接片(262)与所述极耳(222)连接。
  7. 根据权利要求6所述的电池单体，其中，所述极柱(23)为两个，两个所述极柱(23)分别设置在两个所述第一侧壁(211)上。
  8. 根据权利要求6所述的电池单体，其中，所述极耳(222)包括正极耳和负极耳，所述正极耳和所述负极耳设置在所述主体部(221)的同一侧。
  9. 根据权利要求6所述的电池单体，其中，所述极柱(23)铆接或注塑在所述第一侧壁(211)上。
  10. 一种电池，包括如权利要求6至9中任一项所述的电池单体。
  11. 一种用电装置，包括如权利要求10所述的电池。
  12. 一种电池单体的制造方法，包括如下步骤：
    提供一体成型的壳体(21)、极柱(23)和端盖(24)，所述壳体(21)具有至少一个在第一方向(Z)上的开口(213)且包括在第二方向(X)上相对设置的两个第一侧壁(211)以及在第三方向(Y)上相对设置的两个第二侧壁(212)，所述两个第一侧壁(211)和所述两个第二侧壁(212)围合形成容纳腔，所述第一方向(Z)、所述第二方向(X)和所述第三方向(Y)相互垂直；
    提供电极组件(22)，所述电极组件(22)包括主体部(221)和从所述主体部(221)朝所述开口(213)一侧伸出的极耳(222)；以及
    提供转接部件(26)，所述转接部件(26)包括分体设置的第一转接片(261)和第二转接片(262)，将所述极柱(23)设置在所述第一侧壁(211)上并将所述第一转接片(261)与所述极柱(23)连接，将所述第二转接片(262)与所述极耳(222)连接并将所述电极组件(22)放入所述壳体(21)内，将所述第一转接片(261)和所述第二转接片(262)导电连接，并将所述端盖(24)设置在所述开口处以封闭所述容纳腔。
  13. 一种电池单体的制造设备，包括：
    第一提供模块(31)，被配置为提供一体成型的壳体(21)、极柱(23)和端盖(24)，所述壳体(21)包括在第二方向(X)上相对设置的两个第一侧壁(211)以及在第三方向(Y)上相对设置的两个第二侧壁(212)，所述两个第一侧壁(211)和所述两个第二侧壁(212)围合形成容纳腔，所述壳体(21)具有至少一个在第一方向(Z)上的开口(213)；
    第二提供模块(32)，被配置为提供电极组件(22)，所述电极组件(22)包括主体部(221)和从所述主体部(221)向外伸出的极耳(222)；
    第三提供模块(33)，被配置为提供转接部件(26)，所述转接部件 (26)包括分体设置的第一转接片(261)和第二转接片(262)；以及
    组装模块(34)，被配置为将所述极柱(23)安装在所述第一侧壁(211)上且将所述第一转接片(261)与所述极柱(23)连接，将所述第二转接片(262)与所述极耳(222)连接，并将所述电极组件(22)放置在所述容纳腔内，且将所述第一转接片(261)和所述第二转接片(262)导电连接，并将所述端盖(24)设置在所述开口处以封闭所述容纳腔。
PCT/CN2021/121994 2021-09-30 2021-09-30 转接部件、电池单体、电池、用电装置以及电池单体的制造方法和制造设备 WO2023050245A1 (zh)

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