WO2023092344A1 - 电池单体、电池、用电装置、制备电池单体的方法和装置 - Google Patents

电池单体、电池、用电装置、制备电池单体的方法和装置 Download PDF

Info

Publication number
WO2023092344A1
WO2023092344A1 PCT/CN2021/132869 CN2021132869W WO2023092344A1 WO 2023092344 A1 WO2023092344 A1 WO 2023092344A1 CN 2021132869 W CN2021132869 W CN 2021132869W WO 2023092344 A1 WO2023092344 A1 WO 2023092344A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall
electrode assembly
battery
cylindrical electrode
battery cell
Prior art date
Application number
PCT/CN2021/132869
Other languages
English (en)
French (fr)
Inventor
许虎
金海族
赵丰刚
黄思应
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 EP21965082.7A priority Critical patent/EP4428992A1/en
Priority to CN202190000994.0U priority patent/CN220984649U/zh
Priority to PCT/CN2021/132869 priority patent/WO2023092344A1/zh
Publication of WO2023092344A1 publication Critical patent/WO2023092344A1/zh
Priority to US18/669,135 priority patent/US20240322302A1/en

Links

Images

Classifications

    • 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
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/643—Cylindrical cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—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
    • H01M10/6554—Rods or plates
    • H01M10/6555—Rods or plates arranged between the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—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
    • 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
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, in particular to a battery cell, a battery, an electrical device, and a method and device for preparing a battery cell.
  • the battery is usually assembled from multiple battery cells.
  • the life and safety performance of the battery are directly affected by the battery cells.
  • the thermal runaway of the electrode components in the battery cells is easy to cause thermal runaway of other electrode components through heat conduction.
  • the battery cells Thermal runaway directly affects the safety and life of the battery. Therefore, how to improve the safety performance and lifespan of battery cells is an urgent technical problem to be solved.
  • the present application provides a battery cell, a battery, an electrical device, and a method and device for preparing the battery cell, which can reduce the thermal diffusion of the battery cell during thermal runaway, improve the safety of the battery cell, and prolong the service life of the battery.
  • a battery cell comprising: a hexahedral housing, the housing has a first wall and a second wall oppositely disposed, the positive terminal is disposed on the first wall, and the positive terminal is disposed on the second wall.
  • Negative terminal connection comprising: a hexahedral housing, the housing has a first wall and a second wall oppositely disposed, the positive terminal is disposed on the first wall, and the positive terminal is disposed on the second wall.
  • the six walls of the hexahedral casing are divided into adjacent walls and opposite walls, and a cylindrical electrode assembly is used in the hexahedral casing, and the positive electrode tab and the negative electrode tab of the cylindrical electrode assembly are The positive terminal and the negative terminal on the two opposite walls of the hexahedral casing are respectively connected, so that the positive and negative electrodes of the hexahedral battery cell can be drawn from the opposite two walls, and the arrangement of the hexahedral casing and the cylindrical electrode assembly makes the electrode The contact area between the component and the casing is reduced.
  • the heat transfer between the electrode assembly and the casing only relies on the tangent position between the cylinder and the hexahedron, which reduces the thermal diffusion of the electrode assembly, thereby reducing the cost of a battery.
  • the thermal runaway of a single cell causes the possibility of thermal runaway of multiple battery cells, which improves the safety performance of the battery cells and prolongs the service life of the battery.
  • the tabs of the cylindrical electrode assembly are respectively connected to the electrode terminals on the opposite first wall and the second wall at both ends of the cylinder, without winding the tabs to other walls, which improves the space utilization inside the battery cell efficiency; the lugs of the cylindrical electrode assembly are set at both ends of the cylinder, so there is no need for die cutting and winding alignment during processing, which effectively improves the production efficiency of the battery cell and reduces the manufacturing cost; and, except for the hexahedral shell There is also a remaining space outside the cylindrical electrode assembly, which can store the gas generated by the electrode assembly during the electrochemical reaction, avoiding the gas from causing the battery cell to bulge or break and causing safety problems, and improving the safety performance of the battery cell.
  • the positive tab is connected to the positive terminal through a first connecting piece, and the negative tab is connected to the negative terminal through a second connecting piece.
  • the tab is connected to the electrode terminal through a connector.
  • the connector can electrically connect the tab to the electrode terminal without welding, which facilitates the production and processing of the battery cell;
  • the positive and negative pole lugs of the cylindrical electrode assembly are respectively arranged at both ends of the cylinder, and the electrode terminals are also respectively arranged on the opposite walls of the hexahedral shell, so that the transfer distance of the connector is relatively short, and the connector can be saved.
  • the occupied space improves the space utilization rate inside the battery cell.
  • the battery cell includes: a plurality of cylindrical electrode assemblies, the plurality of cylindrical electrode assemblies are arranged side by side in the hexahedral casing along a first direction, and the first The direction is parallel to the first wall.
  • a plurality of cylindrical electrode assemblies are arranged in the battery cell, and the cylindrical electrode assemblies are arranged side by side along a direction parallel to the first wall, that is, the plurality of cylindrical electrode assemblies in the hexahedral casing are arranged on the first side.
  • the infiltration of the electrode assembly in the electrolyte is relatively consistent, which improves the consistency of the electrode assembly, thereby improving the stability of the battery cell.
  • Electrochemical properties in addition, multiple electrode assemblies are arranged side by side so that the contact area between each cylindrical electrode assembly and between each cylindrical electrode assembly and the shell is very small.
  • the housing includes: a housing and an end cover, the housing has at least one opening, the end cover covers the opening, the first wall and/or the second The second wall is the end cap.
  • both the first wall and the second wall are the end covers, which are arranged at both ends of the housing.
  • the first wall and the second wall opposite to each other among the six walls of the hexahedral shell are end covers, and the remaining four walls surround the shell with two upper and lower openings, that is, the shell has two opposite openings.
  • the positive and negative poles of the hexahedral battery cell are drawn from the two opposite faces, so that the poles of the battery cell can be directly connected in the direction perpendicular to the end cap, without the need for converging parts, thus saving on
  • the space for assembling battery cells perpendicular to the direction of the end cap helps to improve the space utilization inside the battery.
  • the housing includes a side wall and a bottom wall, the side wall and the bottom wall are adjacent to each other, and the bottom wall is a wall with the largest area of the housing.
  • the wall with the largest area in the casing of the battery cell is the bottom wall, that is, the battery cell is assembled in the battery in a flat manner.
  • the axis of the cylindrical electrode assembly is parallel to
  • the bottom wall, that is, the axis of the cylindrical electrode assembly is parallel to the horizontal plane.
  • the cylindrical electrode assembly includes: a positive pole piece, a negative pole piece, and a spacer structure arranged between the positive pole piece and the negative pole piece, and the spacer structure is used for The space between the positive pole piece and the negative pole piece is configured, and the space is used for absorbing expansion and deformation of the cylindrical electrode assembly.
  • a spacer structure is provided between the pole pieces of the cylindrical electrode assembly, and the spacer structure can form a reserved area between the pole pieces during the process of winding the pole pieces into a cylindrical electrode assembly. Therefore, after the electrode assembly expands and deforms in the electrochemical reaction, the reserved space can accommodate the expansion of the electrode assembly, so that the cylindrical electrode assembly can expand inward, reduce the degree of outward expansion of the electrode assembly, and reduce the The influence of the expansion and deformation of the electrode assembly on the casing makes it unnecessary to use additional end plates on the bottom wall and top wall of the casing to increase the strength of the battery cell, reduce the manufacturing cost of the battery cell and improve the stability and safety of the battery cell .
  • the length h of the housing along the axial direction and the length t along the second direction satisfy the following formula:
  • the diameter D of the cylindrical electrode assembly satisfies the following formula:
  • t is the length of the housing along the second direction, 0.01mm ⁇ c1 ⁇ 5mm.
  • the length of the housing along the first direction is 150-1200 mm.
  • a battery including: a plurality of battery cells according to the first aspect or any possible implementation manner of the first aspect; and a box body, configured to accommodate the plurality of battery cells.
  • the battery is assembled from battery cells that can reduce thermal diffusion and improve safety performance, helping to avoid thermal diffusion of the battery and improve the safety performance of the battery.
  • the first battery cell and the second battery cell are arranged along the axial direction, and the negative terminal of the first battery cell is connected to the second battery cell.
  • the positive terminals of the two battery cells are connected.
  • the battery cells in the battery can move axially, that is, in the direction perpendicular to the end cap
  • the direct connection between the electrode terminals and the electrode terminals saves the converging parts between the battery cells in the axial direction, and improves the space utilization ratio inside the battery.
  • the first battery cell and the second battery cell among the plurality of battery cells are arranged in the box along the second direction.
  • the battery cells are arranged along the second direction, that is, multiple battery cells are stacked on each other to form a battery through the wall with the largest area, so that the battery can accommodate more battery cells and increase the space inside the battery. utilization rate.
  • the battery includes: a water-cooled plate disposed inside the box and attached to the third wall of the battery cell, the third wall is parallel to the axial direction and Connected to the first wall and the second wall.
  • the third wall may be the bottom wall or the top wall of the housing, or may be the side wall of the housing.
  • the water cooling plate is attached to the top wall or bottom wall of the battery cell, that is, the wall with the largest area, so as to increase the contact area between the water cooling plate and the battery cell, improve the cooling effect of the water cooling plate on the battery, and avoid the temperature of the battery cell
  • the safety problem caused by too high temperature helps to improve the safety performance and life of the battery.
  • the length H of the box in the second direction satisfies the following formula:
  • m is the number of layers of the battery cells arranged in the second direction
  • t is the length of the casing along the second direction, 10mm ⁇ c ⁇ 40mm, 1 ⁇ m ⁇ 8.
  • an electric device including the battery in the second aspect or any possible implementation manner of the second aspect, where the battery is used to provide power for the electric device.
  • a method for preparing a battery cell comprising: providing a hexahedral casing, the casing has a first wall and a second wall oppositely disposed, the first wall is provided with a positive terminal, and the second wall is provided with a positive terminal.
  • a negative electrode terminal is provided on the wall;
  • a cylindrical electrode assembly is provided, the cylindrical electrode assembly is arranged in the casing, and the axial direction of the cylindrical electrode assembly is perpendicular to the first wall or the second wall, so The positive pole tab of the cylindrical electrode assembly is arranged on the first end of the cylindrical electrode assembly and connected to the positive terminal, and the negative pole ear of the cylindrical electrode assembly is arranged on the second end of the cylindrical electrode assembly. terminal and connected with the negative terminal; the cylindrical electrode assembly is installed in the hexahedral casing.
  • a battery cell preparation device including: providing a module for providing a hexahedral casing, the casing has a first wall and a second wall oppositely arranged, and a positive terminal is arranged on the first wall , a negative terminal is provided on the second wall; a cylindrical electrode assembly is provided, the cylindrical electrode assembly is arranged in the casing, and the axial direction of the cylindrical electrode assembly is perpendicular to the first wall or the The second wall, the positive pole lug of the cylindrical electrode assembly is arranged on the first end of the cylindrical electrode assembly and connected to the positive terminal, the negative pole lug of the cylindrical electrode assembly is arranged on the cylindrical electrode assembly The second end of the electrode assembly is connected to the negative terminal; an installation module is used to install the cylindrical electrode assembly in the hexahedral casing.
  • a cylindrical electrode assembly is arranged in a battery cell with a hexahedral casing, and the cylindrical electrode assembly is placed without stacking in the hexahedral casing, so that between the cylindrical electrode assembly and the casing, the cylindrical electrode
  • the contact area between the components is small, which can effectively control the thermal diffusion of the electrode components during thermal runaway, improve the safety performance of the battery cell and prolong the service life of the battery; in addition, this design can also make the battery cell with a hexahedral shell
  • the electrode terminals are arranged on two opposite walls, and the internal electrode terminals of the battery cells can be directly connected to the tabs of the cylindrical electrode assembly, and the battery cells can be directly connected through the electrode terminals, without the need for connectors inside the battery cells and
  • the confluence part between the battery cells reduces the manufacturing cost and effectively saves the space inside the battery along the direction perpendicular to the end caps of the battery cells.
  • Fig. 1 is the structural representation of a kind of vehicle of the present application
  • Fig. 2 is a schematic diagram of an exploded structure of a battery of the present application
  • FIG. 3 is a schematic diagram of a partial structure of a battery cell of the present application.
  • FIG. 4 is a schematic structural diagram of a battery cell according to an embodiment of the present application.
  • FIG. 5 is a schematic cross-sectional view of the battery cell in FIG. 4;
  • FIG. 6 is a schematic structural diagram of another battery cell according to the embodiment of the present application.
  • FIG. 7 is a schematic cross-sectional view of the battery cell in FIG. 6;
  • Fig. 8 is a schematic structural diagram of a casing according to an embodiment of the present application.
  • Fig. 9 is a schematic top view of a battery according to an embodiment of the present application.
  • Figure 10 is a schematic cross-sectional view of the battery in Figure 9;
  • Fig. 11 is a schematic top view of another battery according to the embodiment of the present application.
  • Figure 12 is a schematic cross-sectional view of the battery in Figure 11;
  • Fig. 13 is a schematic structural diagram of an electrical device according to an embodiment of the present application.
  • Fig. 14 is a schematic flowchart of a method for preparing a battery cell according to an embodiment of the present application.
  • FIG. 15 is a schematic structural view of a battery cell manufacturing device according to an embodiment of the present application.
  • a battery refers to a physical module including one or more battery cells to provide electrical energy.
  • the battery mentioned in this application may include a battery module or a battery pack, and the like.
  • Batteries generally include a case for enclosing one or more battery cells. The box can prevent liquid or other foreign objects from affecting the charging or discharging of the battery cells.
  • the battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, which are not limited in this embodiment of the present application.
  • a battery cell may also be referred to as a battery cell.
  • the battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator.
  • a battery cell works primarily by moving metal ions between the positive and negative plates.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode current collector.
  • the current collector not coated with the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer.
  • the current collector coated with the positive electrode active material layer serves as the positive electrode tab.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is coated on the surface of the negative electrode current collector.
  • the current collector without the negative electrode active material layer protrudes from the current collector coated with the negative electrode active material layer.
  • the current collector coated with the negative electrode active material layer serves as the negative electrode tab.
  • the material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon.
  • the number of positive pole tabs is multiple and stacked together, and the number of negative pole tabs is multiple and stacked together.
  • the material of the diaphragm can be polypropylene (Polypropylene, PP) or polyethylene (Polyethylene, PE).
  • the electrode assembly may be a wound structure or a laminated structure, which is not limited in the embodiment of the present application.
  • a plurality of battery cells are firstly integrated into a battery module, and then the battery module is installed in a battery box to form a battery pack.
  • multiple battery cells can also be directly installed in the box to form a battery pack, eliminating the intermediate state of the battery module, thereby reducing the quality of the battery pack and increasing the energy density of the battery.
  • the second packaging technology may also be referred to as a packaging technology from a battery cell to a battery pack (cell to pack) in the related art, and the battery pack may be referred to as a battery for short in this application.
  • Conventional battery cells include cylindrical battery cells and prismatic battery cells (such as blade battery cells), where a prismatic battery cell typically has a square housing and an electrode assembly wound into an elliptical cylinder, a plurality of elliptical cylindrical electrodes Components are stacked in a square shell, and the positive and negative tabs of the elliptical cylindrical electrode assembly are obtained by die-cutting the pole piece, and are arranged on one end of the elliptical cylinder by winding and aligning, and are respectively connected to the positive and negative poles at one end of the elliptical cylindrical shell. terminal.
  • the electrode assemblies are placed in a stacked manner, and there are obvious differences in the heights of the stacked electrode assemblies that are infiltrated by the electrolyte in the battery, resulting in different infiltration conditions of the electrode assemblies and poor consistency, which is not conducive to The electrochemical reaction of the battery proceeds stably.
  • the stacked placement method also makes the contact area between the electrode assembly and the electrode assembly, and between the electrode assembly and the casing larger. After thermal runaway occurs in one electrode assembly, the heat is easily transferred to another electrode assembly or to another electrode assembly through the casing. The battery cell causes severe heat dissipation, which leads to thermal runaway of the entire battery.
  • the electrode assembly will expand and deform during the electrochemical reaction, and the walls of the square casing are usually thin. Additional end plates are needed to improve the strength of the casing to resist the influence of the expansion and deformation of the electrode assembly on the walls of the square casing.
  • the present application provides a technical solution, in which a cylindrical electrode assembly is arranged in a battery cell with a hexahedral casing, and the cylindrical electrode assembly is placed in the hexahedral casing without stacking, so that between the cylindrical electrode assembly and the casing,
  • the contact area between the cylindrical electrode assemblies is small, which can effectively control the thermal diffusion of the electrode assemblies during thermal runaway, improve the safety performance of the battery cell and prolong the service life of the battery; in addition, this design can also make the battery with a hexahedral shell
  • the electrode terminals of the battery cell are arranged on two opposite walls.
  • the internal electrode terminals of the battery cell can be directly connected to the tabs of the cylindrical electrode assembly, and the battery cells can be directly connected through the electrode terminals, without the need for a battery inside the battery cell.
  • the connection piece and the confluence part between the battery cells reduce the manufacturing cost and effectively save the space inside the battery along the direction perpendicular to the end cap of the battery cells.
  • the vehicle 1 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, etc. .
  • a motor 11 , a controller 12 and a battery 10 can be arranged inside the vehicle 1 , and the controller 12 is used to control the battery 10 to supply power to the motor 11 .
  • the battery 10 may be provided at the bottom or front or rear of the vehicle 1 .
  • the battery 10 can be used for power supply of the vehicle 1 , for example, the battery 10 can be used as an operating power source of the vehicle 1 , for a circuit system of the vehicle 1 , for example, for starting, navigating and running power requirements of the vehicle 1 .
  • the battery 10 can not only be used as an operating power source for the vehicle 1 , but can also be used as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .
  • the battery may include multiple battery cells, wherein the multiple battery cells may be connected in series, in parallel or in parallel, and the hybrid connection refers to a mixture of series and parallel connections. Batteries can also be called battery packs.
  • a plurality of battery cells can be connected in series, parallel or mixed to form a battery module, and then a plurality of battery modules can be connected in series, parallel or mixed to form a battery. That is to say, multiple battery cells can directly form a battery, or form a battery module first, and then form a battery from the battery module.
  • the battery 10 may include a plurality of battery cells 20 .
  • the battery 10 may further include a 100 (or called a cover), the inside of the box 100 is a hollow structure, and a plurality of battery cells 20 are accommodated in the box 100 .
  • the box body 100 may include two parts, referred to here as a first part 111 and a second part 112 respectively, and the first part 111 and the second part 112 are fastened together.
  • the shapes of the first part 111 and the second part 112 may be determined according to the combined shape of a plurality of battery cells 20, and each of the first part 111 and the second part 112 may have an opening.
  • both the first part 111 and the second part 112 can be hollow cuboids and each has only one face as an open face, the opening of the first part 111 and the opening of the second part 112 are arranged oppositely, and the first part 111 and the second part 112 are interlocked combined to form a box 100 with a closed chamber.
  • a plurality of battery cells 20 are combined in parallel, in series or in parallel and placed in the box 100 formed by fastening the first part 111 and the second part 112 .
  • the battery 10 may also include other structures, which will not be repeated here.
  • the battery 10 may also include a confluence part, which is used to realize electrical connection between a plurality of battery cells 20 , such as parallel connection, series connection or mixed connection.
  • the current-combining component can realize the electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20 .
  • the bus member may be fixed to the electrode terminal of the battery cell 20 by welding. The electric energy of the plurality of battery cells 20 can be further drawn out through the case body 100 through the conductive mechanism.
  • the conduction means can also belong to the current-collecting part.
  • the number of battery cells 20 can be set to any value. Multiple battery cells 20 can be connected in series, in parallel or in parallel to achieve greater capacity or power.
  • FIG. 3 it is a schematic structural diagram of a battery cell 20 of the present application.
  • the battery cell 20 includes one or more electrode assemblies 22 , a casing 21
  • the casing 21 includes a casing 211 and an end cap 212 .
  • the walls of the housing 211 and the end cover 212 are both referred to as walls of the housing 21 .
  • the casing 211 is determined according to the combined shape of one or more electrode assemblies 22 .
  • the casing 211 shown in FIG. 3 may be a hollow cuboid.
  • One surface of the casing 211 has an opening so that one or more electrode assemblies 22 can be placed in the casing 211 .
  • the end cap 212 covers the opening and is connected with the casing 211 to form a closed cavity for placing the electrode assembly 22 .
  • the casing 211 is filled with electrolyte, such as electrolytic solution.
  • the battery cell 20 may further include two electrode terminals 214 , and the two electrode terminals 214 may be disposed on the end cap 212 .
  • the end cap 212 is usually in the shape of a flat plate, and two electrode terminals 214 are fixed on the flat surface of the end cap 212, and the two electrode terminals 214 are positive electrode terminals 214a and negative electrode terminals 214b respectively.
  • Each electrode terminal 214 is respectively provided with a connecting member 23 , or also called a current collecting member 23 , which is located between the end cap 212 and the electrode assembly 22 for electrically connecting the electrode assembly 22 and the electrode terminal 214 .
  • each electrode assembly 22 has a first tab 221a and a second tab 222a.
  • the polarities of the first tab 221a and the second tab 222a are opposite.
  • the first tab 221a is a positive tab
  • the second tab 222a is a negative tab.
  • the first tab 221a of one or more electrode assemblies 22 is connected to an electrode terminal through a connecting member 23, and the second tab 222a of one or more electrode assemblies 22 is connected to another electrode terminal through another connecting member 23.
  • the positive electrode terminal 214a is connected to the positive electrode tab 221a through one connecting member 23
  • the negative electrode terminal 214b is connected to the negative electrode tab 222a through another connecting member 23 .
  • the electrode assembly 22 can be arranged as a single one or in multiples. As shown in FIG. 3 , four independent electrode assemblies 22 are arranged in the battery cell 20 .
  • a pressure relief mechanism 213 may also be provided on one wall of the battery cell 20 .
  • the pressure relief mechanism 213 is activated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold.
  • the present embodiment provides a battery cell, which can reduce thermal diffusion during thermal runaway of the electrode assembly, improve the safety of the battery cell and prolong the service life of the battery.
  • FIG. 4 shows a schematic structural diagram of a battery cell 20 according to an embodiment of the present application.
  • the battery cell 20 includes:
  • a hexahedral housing 21, the housing 21 has a first wall 21a and a second wall 21b oppositely arranged, the first wall 21a is provided with a positive terminal 214a, and the second wall 21b is provided with a negative terminal 214b;
  • the cylindrical electrode assembly 22 is arranged in the casing 21, the axial direction of the cylindrical electrode assembly 22 is perpendicular to the first wall 21a or the second wall 21b, and the positive electrode tab 221a of the cylindrical electrode assembly 22 is arranged on the cylindrical electrode assembly 22.
  • the first end 22a is connected to the positive terminal 214a, and the negative tab 222a of the cylindrical electrode assembly 22 is disposed on the second end 22b of the cylindrical electrode assembly 22 and connected to the negative terminal 214b.
  • the hexahedral housing 21 includes six walls: 21a, 21b, 21c, 21d, 21e and 21f, wherein the six walls can be divided into adjacent walls and opposite walls.
  • the adjacent walls are, for example, the first wall 21a and the third wall 21c
  • the opposite walls are, for example, the first wall 21a and the second wall 21b.
  • the remaining four walls are side walls of a hexahedron.
  • two adjacent walls in the hexahedral housing 21 are perpendicular to each other.
  • the electrode assembly 22 is wound into a cylindrical structure and arranged in the hexahedral casing 21.
  • the tabs 221a and 222a of the electrode assembly 22 are respectively located at the two ends of the cylinder, respectively facing the first wall 21a and the second wall 21a of the hexahedral casing.
  • the electrode terminals 214a and 214b on the second wall 21b are connected.
  • Fig. 5 is a cross-sectional view of the battery cell 20 in Fig. 4 along the direction A-A'.
  • the cylindrical electrode assembly 22 is tangent to the four walls (21c, 21d, 21e, 21f) on the hexahedral shell 21 parallel to the cylinder axis.
  • a battery cell 20 is obtained by assembling a cylindrical electrode assembly 22 in a hexahedral casing 21 .
  • the positive pole tab 221a and the negative pole tab 222a of the cylindrical electrode assembly 22 are respectively connected to the positive terminal 214a and the negative pole terminal 214b on the two walls 21a and 21b opposite to the hexahedral casing 21, so that the hexahedral battery cell 20
  • the positive and negative electrodes can be drawn from the first wall 21a and the second wall 21b which are arranged oppositely.
  • the arrangement of the hexahedral casing 21 and the cylindrical electrode assembly 22 makes the contact area between the electrode assembly 22 and the casing 21 reduce.
  • the heat transfer between the electrode assembly 22 and the casing 21 only relies on the tangential position between the cylinder and the hexahedron, which reduces the thermal diffusion of the electrode assembly 22, thereby reducing the thermal runaway of one battery cell 20 and causing multiple battery cells.
  • the possibility of thermal runaway 20 improves the safety performance of the battery cell 20 and prolongs the service life of the battery 10 .
  • the tabs 221a and 222a of the cylindrical electrode assembly 22 are respectively connected to the electrode terminals 214 on the opposite first wall 21a and the second wall 21b at the two ends (22a and 22b) of the cylinder, without connecting the tabs 221a and 222a wraps around to other walls, improving the space utilization ratio inside the battery cell 20 .
  • the tabs 221a and 222a of the cylindrical electrode assembly 22 are arranged at both ends of the cylinder (22a and 22b), so there is no need for die cutting and winding alignment during processing, which effectively improves the production efficiency of the battery cell 20 and reduces the manufacturing cost.
  • the hexahedral casing 21 also has a remaining space, which can store the gas generated by the electrode assembly 22 in the electrochemical reaction, so as to prevent the gas from causing the battery cell 20 to bulge or damage, thereby causing safety problems and improving the battery life.
  • the safety performance of the battery cell 20 is also possible.
  • the positive tab 221a is connected to the positive terminal 214a through the first connecting piece 23a
  • the negative tab 222a is connected to the negative terminal 214b through the second connecting piece 23b.
  • the tabs 221a and 222a are connected to the electrode terminals 214 through the connecting piece 23.
  • the connecting piece 23 can electrically connect the tabs 221a and 222a to the electrode terminals 214a and 214b without welding.
  • the positive electrode tab 221a and the negative electrode tab 222a of the cylindrical electrode assembly 22 are respectively arranged on the two ends 22a and 22b of the cylinder, and the electrode terminals 214a and 214b are also arranged on the hexahedron
  • the opposite walls 21 a and 21 b of the housing 21 make the transition distance of the connector 23 shorter, which can save the space occupied by the connector 23 and improve the space utilization rate inside the battery cell 20 .
  • the positive tab 221a is directly connected to the positive terminal 214a
  • the negative tab 222a is directly connected to the negative terminal 214b.
  • the positive electrode tab 221a and the negative electrode tab 222a can form connection areas at both ends of the cylindrical electrode assembly 22 through processes such as kneading or leveling, and the connection areas are directly connected, that is, the tabs 221a and 222a are made Electrical connection is made with the electrode terminals 214a and 214b.
  • the connecting piece 23 by avoiding the use of the connecting piece 23 , the space occupied by the connecting piece 23 inside the battery cell 20 is further saved, and the utilization rate of the space inside the battery cell 20 is further improved.
  • FIG. 6 is another schematic structural view of the battery cell 20 of the present application.
  • Fig. 7 is a cross-sectional view of the battery cell 20 shown in Fig. 6 along the direction A-A'.
  • the battery cell 20 includes: a plurality of cylindrical electrode assemblies 22 , and the plurality of cylindrical electrode assemblies 22 are arranged side by side in a hexahedral casing 21 along a first direction. One direction is parallel to the first wall 21a.
  • one battery cell 20 includes 1-5 electrode assemblies 22 .
  • a plurality of cylindrical electrode assemblies 22 are not stacked and placed side by side in the casing 21. Therefore, in the state where the axial direction of the cylindrical electrode assemblies 22 is parallel to the horizontal plane, the electrode assemblies 22 in the electrolyte The wetting condition is relatively consistent, which improves the consistency of the electrode assembly 22, thereby improving the electrochemical performance of the battery cell 20; in addition, a plurality of electrode assemblies 22 are arranged side by side so that between each cylindrical electrode assembly 22, each cylindrical electrode assembly 22 The contact area between the electrode assembly 22 and the casing 21 is very small.
  • the housing 21 includes: a housing 211 and an end cover 212, the housing 21 has at least one opening, the end cover 212 covers the opening, the first wall 21a and/or The second wall 21b is an end cover 212 .
  • the first wall 21a is the end cap 212
  • the second wall 21b, the third wall 21c, the fourth wall 21d, the fifth wall 21e and the sixth wall 21f of the hexahedron shell are processed to have A hexahedral structure with an opening, that is, the shell 211 has five walls
  • the first wall 21a can cover the opening to form the shell 21, the opening can make the electrode assembly installed in the shell and provide an operating space for the processing of the end cap and the electrode assembly .
  • the electrode assembly 22 is installed into the casing 211 from the opening, and is electrically connected with the first wall 21a at the opening to form an electrical connection; the electrode assembly 22 and the second wall 21b are welded or other penetrating processing to form an electrical connection.
  • both the first wall 21 a and the second wall 21 b are end caps 212 disposed at both ends of the casing 21 .
  • the third wall 21c, the fourth wall 21d, the fifth wall 21e and the sixth wall 21f of the hexahedron shell are processed into the four side walls of the hollow hexahedron structure to form the shell 211, and the first wall 21a Both the second wall and the second wall 21b are end caps 212 for covering the opening of the housing 211 to form the shell 21 .
  • the casing 21 has two opposite end caps 212, and the positive and negative poles of the battery cell 20 in the shape of a hexahedron are drawn from the two opposite faces, so that the electrode terminals 214 of the battery cell 20 can be vertically
  • the direction of the end cover 212 is directly connected without the need for confluence parts, thereby saving the space for assembling the battery cells 20 in the direction perpendicular to the end cover 212, and the housing 211 has two openings, which is more convenient for the processing of the battery cells, and at the same time Help to improve the space utilization ratio inside the battery 10 .
  • the housing 211 includes a side wall and a bottom wall, the side wall and the bottom wall are arranged adjacently, and the bottom wall is the wall with the largest area of the housing 211 .
  • the four walls that make up the housing 211 include two side walls 21c and 21e, a bottom wall 21d and a top wall 21e, and the bottom wall 21d is equal in area to the top wall 21e. is the wall with the largest area of the casing 211 .
  • the wall with the largest area in the casing 211 of the battery cell 21 is used as the bottom wall 21d, that is, the battery cell 21 is assembled in the battery 10 in a flat manner, and the cylindrical electrode assembly 22 in this placed state
  • the axis is parallel to the bottom wall 21d, that is, the axis of the cylindrical electrode assembly 22 is parallel to the horizontal plane.
  • the electrode assemblies 22 are arranged side by side without stacking, which helps to improve the consistency of the electrode assembly 22 .
  • the cylindrical electrode assembly 22 includes: a positive pole piece, a negative pole piece, and a spacer structure arranged between the positive pole piece and the negative pole piece, and the spacer structure is used to construct the positive pole piece and the negative pole piece.
  • the space between the pole pieces is used to absorb the expansion and deformation of the columnar electrode assembly 22 .
  • the spacer structure can be constructed through the structure on the electrode sheet or the diaphragm, so that there is a reserved space inside the electrode assembly 22 wound into a cylindrical shape; it can also be provided with other structural structures on the electrode sheet or the diaphragm.
  • a spacer structure can be constructed between the positive pole piece and the negative pole piece by embossing a pattern on the electrode pole piece or diaphragm, such as bumps or pits. At this time, the spacer structure is the pole piece or diaphragm. a part of.
  • the spacer structure may be constructed by brushing polycarbosilane (Polysilacarbosilane, PCS) on the electrode sheet or diaphragm.
  • a spacer structure is provided between the pole pieces of the cylindrical electrode assembly 22, and the spacer structure can form a reserved space between the pole pieces during the process of winding the pole pieces into a cylindrical electrode assembly 22. Therefore, after the electrode assembly 22 expands and deforms in the electrochemical reaction, the reserved space can accommodate the expansion of the electrode assembly 22, so that the cylindrical electrode assembly 22 can expand inwardly, reducing the degree of outward expansion of the electrode assembly 22 , reducing the influence of the expansion and deformation of the electrode assembly 22 on the casing 211, so that the bottom wall 21d and the top wall 21e of the casing 211 do not need to use additional end plates to increase the strength of the battery cell 20, and reduce the manufacturing cost of the battery cell 20 at the same time Improve the stability and safety of the battery cell 20 .
  • the length h of the casing 211 along the axial direction and the length t along the second direction satisfy the following formula:
  • the second direction is a direction perpendicular to the bottom wall 21d.
  • part of the space can be reserved for the cylindrical electrode assembly 22 in the hexahedral shell 21 , further reducing the influence of the expansion and deformation of the electrode assembly 22 on the shell 21 .
  • the diameter D of the cylindrical electrode assembly 22 satisfies the following formula:
  • t is the length of the housing 211 along the second direction, 0.01mm ⁇ c1 ⁇ 5mm, preferably 0.8mm ⁇ c1 ⁇ 2mm.
  • the length of the casing 21 along the first direction is 150-1200 mm, preferably 280-450 mm.
  • the battery cell 20 in the embodiment of the present application has been introduced above with reference to FIGS. arrangement.
  • FIG. 9 is a schematic top view of a battery 10 of the present application.
  • Fig. 10 is a schematic cross-sectional view of the battery 10 in Fig. 9 along the direction A-A'.
  • the battery 10 includes: a plurality of battery cells 20 , and a case body 100 for accommodating the plurality of battery cells 20 .
  • the battery 10 is assembled from battery cells 20 that can reduce thermal diffusion and improve safety performance, which helps avoid thermal diffusion of the battery 10 and improves the safety performance of the battery 10 .
  • the first battery cell 201 and the second battery cell 202 are arranged axially in the case 100, and the negative terminal 214b of the first battery cell 201 is connected to the second battery cell 201.
  • the positive terminal 214a of the battery cell 202 is connected.
  • the plurality of battery cells 20 are arranged in columns along the axial direction in the case 100, and arranged in rows along the first direction.
  • the negative terminal 214 b of the first battery cell 201 is connected to the positive terminal 214 a of the second battery cell 202 . That is, multiple rows of battery cells 20 are assembled in the axial direction by directly connecting the electrode terminals 214 to the plurality of battery cells 20 in the axial direction.
  • the assembly of multiple rows of battery cells 20 in the direction perpendicular to the axial direction is realized by connecting the flow-combining components.
  • the battery cell 20 in the battery 10 can pass through in the axial direction.
  • the electrode terminals 214 are directly connected, thereby eliminating the need for a confluence component between the battery cells 20 in the axial direction, and improving the space utilization ratio inside the battery 10 .
  • the number of rows of the plurality of battery cells 20 arranged in the axial direction is less than the number of columns of the plurality of battery cells 20 arranged in the first direction.
  • FIG. 11 is another schematic top view of a battery 10 of the present application.
  • Fig. 12 is a schematic cross-sectional view of the battery 10 in Fig. 11 along the direction A-A'.
  • the number of rows of battery cells 20 arranged in the axial direction is greater than or equal to the number of columns of battery cells 20 arranged in the first direction.
  • the first battery cells 201 and the second battery cells 202 of the plurality of battery cells 20 are arranged in the case 100 along a second direction, and the second direction is perpendicular to the axial direction and perpendicular to the first direction.
  • the battery 10 includes multiple layers of battery cells 20 in the second direction.
  • the battery 10 includes two layers of battery cells 20 in the second direction.
  • the plurality of battery cells in the box can be arranged in both the axial direction and the second direction, or only one of them. No restrictions.
  • the bottom wall 21d of the first battery cell 201 may be in direct contact with the top wall 21e of the second battery cell 202 , or may be in contact between the bottom wall 21d of the first battery cell 201 and the top wall of the second battery cell 202 . 21e directly set structural glue or heat insulation pad, etc.
  • the battery cells are arranged along the second direction, that is, multiple battery cells are stacked on each other to form a battery through the wall with the largest area, so that the battery can accommodate more battery cells and increase the space inside the battery. utilization rate.
  • the battery 10 includes: a water cooling plate 122 disposed inside the case 100 and attached to the third wall 21c of the battery cell 20, the third wall 21c is parallel to the axial direction and is parallel to the first The wall 21a is connected to the second wall 21b.
  • the third wall 21 c may be the top wall or the bottom wall of the housing 211 , and may also be a side wall of the housing 211 .
  • the water cooling plate 122 is attached to the top wall or the bottom wall of the casing 211 , that is, the wall with the largest area.
  • the water cooling plate 122 is arranged between the layers of the battery cells 20 .
  • the heat dissipation caused by thermal runaway is further reduced by installing the water cooling plate 122 in the battery 10, and the cooling effect of the water cooling plate 122 on the battery 10 is improved by increasing the contact area between the water cooling plate 211 and the battery cell 20 As a result, the safety problem caused by the overheating of the battery cell 20 can be avoided, and the safety performance and service life of the battery 10 can be improved.
  • the length H of the box body 100 in the second direction satisfies the following formula:
  • m is the number of layers of the plurality of battery cells 20 arranged in the second direction
  • t is the length of the casing along the second direction, 10mm ⁇ c ⁇ 40mm, 1 ⁇ m.
  • an embodiment of the present application also provides an electrical device 1300 , which may include the battery 10 in the foregoing embodiments, and the battery 10 is used to provide electrical energy to the electrical device 1300 .
  • the electrical device 1300 may be a vehicle 1 , a ship or a spacecraft.
  • the battery cell 20, the battery 10, and the electrical device 1300 of the embodiment of the present application are described above, and the method and equipment for preparing the battery cell 20 of the embodiment of the present application will be described below.
  • FIG. 14 shows a schematic flowchart of a method 300 for preparing a battery cell 20 according to an embodiment of the present application. As shown in FIG. 14 , the method 400 may include the following steps.
  • the casing 21 has a first wall 21a and a second wall 21b opposite to each other, the first wall 21a is provided with a positive terminal 214a, and the second wall 21b is provided with a negative terminal 214b.
  • the cylindrical electrode assembly 22 is arranged in the casing 21, the axial direction of the cylindrical electrode assembly 22 is perpendicular to the first wall 21a or the second wall 21b, and the positive electrode tab 221a of the cylindrical electrode assembly 22
  • the negative tab 222a of the cylindrical electrode assembly 22 is disposed on the second end 22b of the cylindrical electrode assembly 22 and connected to the negative terminal 214b.
  • FIG. 15 shows a schematic block diagram of an apparatus 500 for preparing a battery cell 20 according to an embodiment of the present application.
  • the device 500 for preparing a battery may include: a providing module 501 and an installation module 502 .
  • the providing module 501 is used to provide the hexahedral housing 21, the housing 21 has a first wall 21a and a second wall 21b oppositely arranged, the positive terminal 214a is provided on the first wall 21a, and the negative terminal 214b is provided on the second wall 21b;
  • a cylindrical electrode assembly 22 is provided, the cylindrical electrode assembly 22 is arranged in the housing 21, the axial direction of the cylindrical electrode assembly 22 is perpendicular to the first wall 21a or the second wall 21b, and the positive electrode tab 221a of the cylindrical electrode assembly 22 is arranged on The first end 22a of the cylindrical electrode assembly 22 is connected to the positive terminal 214a, and the negative tab 222a of the cylindrical electrode assembly 22 is disposed on the second end 22b of the cylindrical electrode assembly 22 and connected to the negative terminal 214b.
  • the installation module 502 is used for installing the cylindrical electrode assembly 22 in the hexahedral casing 21 .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请实施例提供一种电池单体、电池、用电装置以及制备电池单体的方法与设备，其中，电池单体包括：六面体外壳，具有相对设置的第一壁和第二壁，第一壁上设置有正极端子，第二壁上设置有负极端子；圆柱状电极组件，设置于外壳中，圆柱状电极组件的轴向垂直于第一壁或第二壁，圆柱状电极组件的正极极耳设置于圆柱状电极组件的第一端并与正极端子连接，圆柱状电极组件的负极极耳设置于圆柱状电极组件的第二端并与负极端子连接，本申请提供的电池单体能够降低电池单体热失控时的热扩散，提高电池单体的安全性并延长电池的使用寿命。

Description

电池单体、电池、用电装置、制备电池单体的方法和装置 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、用电装置、制备电池单体的方法和装置。
背景技术
随着电池技术的发展，电池作为重要的能量转换装置在电子设备、交通工具等领域得到了广泛的应用，电池的安全性与寿命也日益称为电池技术关注的焦点。
电池通常由多个电池单体组装得到，电池的寿命与安全性能受电池单体的直接影响，电池单体中的电极组件发生热失控后易通过热传导导致其他电极组件发生热失控，电池单体的热失控直接影响电池的安全与寿命。因此，如何提升电池单体的安全性能与寿命是一个亟待解决的技术问题。
发明内容
本申请提供一种电池单体、电池、用电装置以及制备电池单体的方法和装置，能够降低电池单体热失控时的热扩散，提高电池单体的安全性并延长电池的使用寿命。
第一方面，提供一种电池单体，包括：六面体外壳，所述外壳具有相对设置的第一壁和第二壁，所述第一壁上设置有正极端子，所述第二壁上设置有负极端子；圆柱状电极组件，所述圆柱状电极组件设置于所述外壳中，所述圆柱状电极组件的轴向垂直于所述第一壁或所述第二壁，所述圆柱状电极组件的正极极耳设置于所述圆柱状电极组件的第一端并与所述正极端子连接，所述圆柱状电极组件的负极极耳设置于所述圆柱状电极组件的第二端并与所述负极端子连接。
本申请实施例的技术方案中，六面体外壳的六个壁分为相邻设置的壁与相对设置的壁，在六面体外壳中采用圆柱状电极组件，圆柱状电极组件的正极极耳与负极极耳分别与六面体外壳相对设置的两壁上的正极端子和负极端子连接，从而使得六面体状的电池单体的正、负极能够从相对设置的两壁引出，六面体外壳与圆柱状电极组件 的设置使得电极组件与外壳的接触面积减小，当电极组件发生热失控时，电极组件与外壳之间仅依靠圆柱体与六面体相切的位置传热，减小了电极组件的热扩散，从而降低了一个电池单体热失控引发多个电池单体热失控的可能性，提高了电池单体的安全性能并延长了电池的使用寿命。另外，圆柱状电极组件的极耳分别在圆柱的两端与相对设置的第一壁与第二壁上的电极端子连接，无需将极耳绕至其他壁，提高了电池单体内部的空间利用率；圆柱状电极组件的极耳设置于圆柱的两端，因此在加工过程中无需切模、卷绕对齐，有效提高了电池单体的生产效率并降低了制造成本；并且，六面体外壳中除容纳圆柱状电极组件外还具有剩余空间，能够储存电极组件在电化学反应中产生的气体，避免该气体导致电池单体鼓包或破损从而造成安全问题，提高电池单体的安全性能。
在一种可能的实现方式中，所述正极极耳通过第一连接件与所述正极端子连接，所述负极极耳通过第二连接件与所述负极端子连接。
本实施例的技术方案中，极耳通过连接件与电极端子连接，一方面，在无需焊接加工的情况下，连接件能够使极耳与电极端子实现电连接，便于电池单体的生产加工；另一方面，圆柱状电极组件的正、负极极耳分别设置于圆柱的两端，电极端子也分别设置于六面体外壳相对设置的壁上，使得连接件的转接距离较短，能够节省连接件占用的空间，提高电池单体内部的空间利用率。
在一种可能的实现方式中，所述电池单体包括：多个所述圆柱状电极组件，多个所述圆柱状电极组件在所述六面体外壳中沿第一方向并列设置，所述第一方向平行于所述第一壁。
本实施例的技术方案中，电池单体中设置多个圆柱状电极组件且圆柱状电极组件沿与第一壁平行的方向并列设置，即六面体外壳中的多个圆柱状电极组件在第一方向上无堆叠，因此，在圆柱状电极组件的轴向平行于水平面的放置状态下，电极组件的在电解液中的浸润情况较为一致，提升了电极组件的一致性，从而提高了电池单体的电化学性能；另外，多个电极组件并列设置使得每个圆柱状电极组件之间、每个圆柱状电极组件与外壳之间的接触面积均很小，因此，在一个电极组件热失控时，热扩散较小，不易通过一个电极组件传递至另一个电极组件从而导致电池单体热失控，提高了电池单体的安全性能并延长了电池的使用寿命。
在一种可能的实现方式中，所述外壳包括：壳体和端盖，所述壳体具有至少一 个开口，所述端盖盖合所述开口，所述第一壁和/或所述第二壁为所述端盖。
优选地，所述第一壁和所述第二壁均为所述端盖，设置于所述壳体的两端。
本实施例的技术方案中，六面体外壳的六个壁中相对设置的第一壁和第二壁均为端盖，剩余四个壁围城具有上下两个开口的壳体，即外壳具有两个相对设置的端盖，六面体外形的电池单体的正、负极从相对设置的两个面引出，使得电池单体的极柱能够在垂直于端盖的方向上直接连接，无需汇流部件，从而节省在垂直于端盖方向上组装电池单体的空间，帮助提高电池内部的空间利用率。
在一种可能的实现方式中，所述壳体包括侧壁和底壁，所述侧壁和所述底壁相邻设置，所述底壁为所述壳体面积最大的壁。
本实施例的技术方案中，电池单体的壳体中面积最大的壁为底壁，即电池单体以平躺的方式组装于电池中，此放置状态下圆柱状电极组件的轴向平行于底壁，即圆柱状电极组件的轴向平行于水平面，当存在多个圆柱状电极组件时，电极组件之间并列设置无堆叠，帮助提高电极组件的一致性。
在一种可能的实现方式中，所述圆柱状电极组件包括：正极极片、负极极片以及设置于所述正极极片与所述负极极片之间的间隔结构，所述间隔结构用于构造所述正极极片与所述负极极片之间的间隔，所述间隔用于吸收所述圆柱状电极组件的膨胀变形。
本实施例的技术方案中，圆柱状电极组件的极片之间设置有间隔结构，间隔结构能够在将极片卷绕成圆柱状电极组件的过程中使得极片与极片之间形成预留空间，因此，电极组件在电化学反应中发生膨胀变形后，该预留空间能够容纳电极组件的膨胀，从而使得圆柱状电极组件能够向内部膨胀，减小电极组件向外膨胀的程度，降低了电极组件膨胀变形对壳体的影响，使得壳体的底壁与顶壁无需采用额外的端板增加电池单体的强度，降低电池单体制造成本的同时提高电池单体的稳定性与安全性。
在一种可能的实现方式中，所述壳体沿所述轴向的长度h与沿第二方向的长度t满足下式：
h＝n*t’
其中，n为所述圆柱状电极组件的数量，n≥1，t’＝t±20mm，所述第二方向垂直于所述轴向和所述第一方向。
在一种可能的实现方式中，所述圆柱状电极组件的直径D满足下式：
D＝t–c1
其中，t为所述壳体沿所述第二方向的长度，0.01mm≤c1≤5mm。
在一种可能的实现方式中，所述壳体沿所述第一方向的长度为150-1200mm。
第二方面，提供一种电池，包括：多个如第一方面或第一方面任一种可能的实现方式中的电池单体；箱体，用于容纳多个所述电池单体。
本实施例的技术方案中，电池由能够降低热扩散、提高安全性能的电池单体组装得到，帮助避免电池的热扩散并提高电池的安全性能。
在一种可能的实现方式中，多个所述电池单体中的第一电池单体和第二电池单体沿所述轴向排列，所述第一电池单体的负极端子与所述第二电池单体的正极端子连接。
本实施例的技术方案中，由于六面体状的电池单体的正、负极端子位于相对设置的两个端面上，故电池中的电池单体在沿轴向，即垂直于端盖的方向上能够通过电极端子与电极端子直接连接，从而省去了轴向上电池单体之间的汇流部件，提高了电池内部的空间利用率。
在一种可能的实现方式中，多个所述电池单体中的第一电池单体和第二电池单体在所述箱体中沿所述第二方向排列。
本实施例的技术方案中，电池单体沿第二方向排列，即多个电池单体通过面积最大的壁互相堆叠组成电池，使得电池中能够容纳更多的电池单体，提高电池内部的空间利用率。
在一种可能的实现方式中，所述电池包括：水冷板，设置于所述箱体内部且与所述电池单体的第三壁附接，所述第三壁平行于所述轴向并与所述第一壁和所述第二壁连接。
本实施例的技术方案中，应理解，第三壁可以是壳体的底壁或顶壁，也可以是壳体的侧壁。优选地，水冷板附接于电池单体的顶壁或底壁，即面积最大的壁，增大水冷板与电池单体的接触面积，提高水冷板对电池的降温效果，避免电池单体温度过高引发的安全问题，帮助提高电池的安全性能与寿命。
在一种可能的实现方式中，所述箱体在所述第二方向上的长度H满足下式：
H–c＝m*t
其中，m为所述多个所述电池单体在所述第二方向上排列的层数，t为所述壳体沿所述第二方向的长度，10mm≤c≤40mm，1≤m≤8。
第三方面，提供一种用电装置，包括如第二方面或第二方面任一种可能的实现方式中的的电池，所述电池用于为所述用电装置供电。
第四方面，提供一种电池单体的制备方法，包括：提供六面体外壳，所述外壳具有相对设置的第一壁和第二壁，所述第一壁上设置有正极端子，所述第二壁上设置有负极端子；提供圆柱状电极组件，所述圆柱状电极组件设置于所述外壳中，所述圆柱状电极组件的轴向垂直于所述第一壁或所述第二壁，所述圆柱状电极组件的正极极耳设置于所述圆柱状电极组件的第一端并与所述正极端子连接，所述圆柱状电极组件的负极极耳设置于所述圆柱状电极组件的第二端并与所述负极端子连接；将所述圆柱状电极组件安装于所述六面体外壳中。
第五方面，提供一种电池单体的制备装置，包括：提供模块，用于提供六面体外壳，所述外壳具有相对设置的第一壁和第二壁，所述第一壁上设置有正极端子，所述第二壁上设置有负极端子；提供圆柱状电极组件，所述圆柱状电极组件设置于所述外壳中，所述圆柱状电极组件的轴向垂直于所述第一壁或所述第二壁，所述圆柱状电极组件的正极极耳设置于所述圆柱状电极组件的第一端并与所述正极端子连接，所述圆柱状电极组件的负极极耳设置于所述圆柱状电极组件的第二端并与所述负极端子连接；安装模块，用于将所述圆柱状电极组件安装于所述六面体外壳中。
基于本申请实施例的技术方案，在具有六面体外壳的电池单体中配置圆柱状的电极组件，圆柱状电极组件在六面体外壳中无堆叠放置，使得圆柱状电极组件与外壳之间、圆柱状电极组件之间的接触面积较小，有效控制电极组件热失控时的热扩散，提升电池单体的安全性能并延长了电池的使用寿命；另外，该设计还能够使得具有六面体外壳的电池单体的电极端子设置于相对的两个壁上，电池单体内部电极端子能够直接与圆柱状电极组件的极耳连接，电池单体之间能够直接通过电极端子连接，无需电池单体内部的连接件以及电池单体之间的汇流部件，降低制造成本的同时有效节省了电池内部沿垂直于电池单体端盖方向上的空间。
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是本申请一种车辆的结构示意图；
图2是本申请一种电池的分解结构示意图；
图3是本申请一种电池单体的局部结构示意图；
图4是本申请实施例的一种电池单体的结构示意图；
图5是图4中的电池单体的示意性截面图；
图6是本申请实施例的另一种电池单体的结构示意图；
图7是图6中的电池单体的示意性截面图；
图8是本申请实施例的一种外壳的结构示意图；
图9是本申请实施例的一种电池的示意性俯视图；
图10是图9中的电池的示意性截面图；
图11是本申请实施例的另一种电池的示意性俯视图；
图12是图11中的电池的示意性截面图；
图13是本申请实施例的一种用电装置的结构示意图；
图14是本申请实施例的一种电池单体的制备方法的示意性流程图；
图15是本申请实施例的一种电池单体的制备装置的结构示意图。
在附图中，附图并未按照实际的比例绘制。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理，但不能用来限制本申请的范围，即本申请不限于所描述的实施例。
在本申请的描述中，需要说明的是，除非另有说明，“多个”的含义是两个以上；术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”、“第三”等仅用于描述目的，而不能理解为指示或暗示相对重要性。“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。
下述描述中出现的方位词均为图中示出的方向，并不是对本申请的具体结构进行限定。在本申请的描述中，还需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可视具体情况理解上述术语在本申请中的具体含义。
本申请中术语“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：存在A，同时存在A和B，存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
除非另有定义，本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本申请所描述的实施例可以与其它实施例相结合。
本申请中，电池是指包括一个或多个电池单体以提供电能的物理模块。例如，本申请中所提到的电池可以包括电池模块或电池包等。电池一般包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
可选地，电池单体可以包括锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，本申请实施例对此并不限定。在一些实施方式中，电池单体也可称之为电芯。
电池单体包括电极组件和电解液，电极组件由正极片、负极片和隔膜组成。电池单体主要依靠金属离子在正极片和负极片之间移动来工作。正极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面，未涂敷正极活性物质层的集流体凸出于已涂覆正极活性物质层的集流体，未涂敷正极活性物质层的集流体作为正极极耳。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质可以 为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面，未涂敷负极活性物质层的集流体凸出于已涂覆负极活性物质层的集流体，未涂敷负极活性物质层的集流体作为负极极耳。负极集流体的材料可以为铜，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断，正极极耳的数量为多个且层叠在一起，负极极耳的数量为多个且层叠在一起。隔膜的材质可以为聚丙烯(Polypropylene，PP)或聚乙烯(Polyethylene，PE)等。此外，电极组件可以是卷绕式结构，也可以是叠片式结构，本申请实施例并不限于此。
电池技术的发展要同时考虑多方面的设计因素，例如，能量密度、循环寿命、放电容量、充放电倍率等性能参数，另外，还需要考虑电池在用电装置中安装的稳定性，以提高电池在用电装置中的安全性。
在一些电池封装技术中，首先将多个电池单体(cell)先整合为电池模组(module)，然后将电池模组安装于电池的箱体中，形成电池包(pack)。而另一些电池封装技术中，也可直接将多个电池单体安装设置于箱体中形成电池包，去除了电池模组这个中间状态，从而可降低电池包的质量并提高电池的能量密度。该第二种封装技术在相关技术中也可称之为电池单体至电池包(cell to pack)的封装技术，该电池包在本申请中可简称为电池。
常规的电池单体包括圆柱形电池单体和方形电池单体(例如刀片式电池单体)，其中，方形电池单体通常具有方形外壳和卷绕成椭圆柱的电极组件，多个椭圆柱状电极组件在方形外壳中堆叠放置，椭圆柱状电极组件的正、负极耳通过模切工艺加工极片得到，并通过卷绕对齐设置于椭圆柱的一端，分别连接至椭圆柱形外壳一端的正、负极端子上。但在上述电池单体中，电极组件均采用堆叠的放置方式，堆叠放置的电极组件在电池中被电解液浸润的高度存在明显差异，导致电极组件的浸润情况不同，一致性较差，不利于电池的电化学反应稳定进行。堆叠的放置方式还使得电极组件与电极组件之间、电极组件与外壳之间的接触面积较大，一个电极组件发生热失控后，热量极易传递至另一电极组件或通过外壳传递至另一电池单体，造成严重的热扩散，从而引发整个电池的热失控。另外，电极组件在电化学反应中会膨胀变形，方形外壳的壁通常较薄，需要额外的端板提高外壳的强度以抵抗电极组件膨胀变形对方形外壳的壁的影响。
有鉴于此，本申请提供一种技术方案，在具有六面体外壳的电池单体中配置圆 柱状的电极组件，圆柱状电极组件在六面体外壳中无堆叠放置，使得圆柱状电极组件与外壳之间、圆柱状电极组件之间的接触面积较小，有效控制电极组件热失控时的热扩散，提升电池单体的安全性能并延长了电池的使用寿命；另外，该设计还能够使得具有六面体外壳的电池单体的电极端子设置于相对的两个壁上，电池单体内部电极端子能够直接与圆柱状电极组件的极耳连接，电池单体之间能够直接通过电极端子连接，无需电池单体内部的连接件以及电池单体之间的汇流部件，降低制造成本的同时有效节省了电池内部沿垂直于电池单体端盖方向上的空间。
本申请实施例描述的技术方案均适用于各种使用电池的装置，例如，手机、便携式设备、笔记本电脑、电瓶车、电动玩具、电动工具、电动车辆、船舶和航天器等。
应理解，本申请实施例描述的技术方案不仅仅局限适用于上述所描述的装置，还可以适用于所有使用电池的装置，但为描述简洁，下述实施例均以电动车辆为例进行说明。
例如，如图1所示，为本申请一种车辆1的结构示意图，车辆1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1的内部可以设置马达11，控制器12以及电池10，控制器12用来控制电池10为马达11的供电。例如，在车辆1的底部或车头或车尾可以设置电池10。电池10可以用于车辆1的供电，例如，电池10可以作为车辆1的操作电源，用于车辆1的电路系统，例如，用于车辆1的启动、导航和运行时的工作用电需求。在本申请的另一实施例中，电池10不仅仅可以作为车辆1的操作电源，还可以作为车辆1的驱动电源，替代或部分地替代燃油或天然气为车辆1提供驱动动力。
为了满足不同的使用电力需求，电池可以包括多个电池单体，其中，多个电池单体之间可以串联或并联或混联，混联是指串联和并联的混合。电池也可以称为电池包。可选地，多个电池单体可以先串联或并联或混联组成电池模块，多个电池模块再串联或并联或混联组成电池。也就是说，多个电池单体可以直接组成电池，也可以先组成电池模块，电池模块再组成电池。
例如，如图2所示，为本申请一种电池10的结构示意图，电池10可以包括多个电池单体20。电池10还可以包括100(或称罩体)，箱体100的内部为中空结构，多个电池单体20容纳于箱体100内。如图2所示，箱体100可以包括两部分，这里分别称为第一部分111和第二部分112，第一部分111和第二部分112扣合在一起。第一 部分111和第二部分112的形状可以根据多个电池单体20组合的形状而定，第一部分111和第二部分112可以均具有一个开口。例如，第一部分111和第二部分112均可以为中空长方体且各自只有一个面为开口面，第一部分111的开口和第二部分112的开口相对设置，并且第一部分111和第二部分112相互扣合形成具有封闭腔室的箱体100。多个电池单体20相互并联或串联或混联组合后置于第一部分111和第二部分112扣合后形成的箱体100内。
可选地，电池10还可以包括其他结构，在此不再一一赘述。例如，该电池10还可以包括汇流部件，汇流部件用于实现多个电池单体20之间的电连接，例如并联或串联或混联。具体地，汇流部件可通过连接电池单体20的电极端子实现电池单体20之间的电连接。进一步地，汇流部件可通过焊接固定于电池单体20的电极端子。多个电池单体20的电能可进一步通过导电机构穿过箱体100而引出。可选地，导电机构也可属于汇流部件。
根据不同的电力需求，电池单体20的数量可以设置为任意数值。多个电池单体20可通过串联、并联或混联的方式连接以实现较大的容量或功率。
如图3所示，为本申请的电池单体20的结构示意图，电池单体20包括一个或多个电极组件22、外壳21，外壳21包括壳体211和端盖212。壳体211的壁以及端盖212均称为外壳21的壁。壳体211根据一个或多个电极组件22组合后的形状而定，作为示例，图3中所示的壳体211可以为中空的长方体。壳体211的其中一个面具有开口以便一个或多个电极组件22可以放置于壳体211内。端盖212覆盖开口并且与壳体211连接，以形成放置电极组件22的封闭的腔体。壳体211内填充有电解质，例如电解液。
该电池单体20还可以包括两个电极端子214，两个电极端子214可以设置在端盖212上。端盖212通常是平板形状，两个电极端子214固定在端盖212的平板面上，两个电极端子214分别为正电极端子214a和负电极端子214b。每个电极端子214各对应设置一个连接构件23，或者也可以称为集流构件23，其位于端盖212与电极组件22之间，用于将电极组件22和电极端子214实现电连接。
如图3所示，每个电极组件22具有第一极耳221a和第二极耳222a。第一极耳221a和第二极耳222a的极性相反。例如，当第一极耳221a为正极极耳时，第二极耳222a为负极极耳。一个或多个电极组件22的第一极耳221a通过一个连接构件23与一 个电极端子连接，一个或多个电极组件22的第二极耳222a通过另一个连接构件23与另一个电极端子连接。例如，正电极端子214a通过一个连接构件23与正极极耳221a连接，负电极端子214b通过另一个连接构件23与负极极耳222a连接。
在该电池单体20中，根据实际使用需求，电极组件22可设置为单个，或多个，如图3所示，电池单体20内设置有4个独立的电极组件22。
作为示例，电池单体20的一个壁上还可设置泄压机构213。泄压机构213用于电池单体20的内部压力或温度达到阈值时致动以泄放内部压力或温度。
基于上述电池以及电池单体的结构，本实施例提供一种电池单体，能够降低电极组件热失控时的热扩散，提高电池单体的安全性并延长电池的使用寿命。
图4示出了本申请实施例一种电池单体20的结构示意图。如图4所示，电池单体20包括：
六面体外壳21，外壳21具有相对设置的第一壁21a和第二壁21b，第一壁21a上设置有正极端子214a，第二壁21b上设置有负极端子214b；
圆柱状电极组件22，设置于外壳21中，圆柱状电极组件22的轴向垂直于第一壁21a或第二壁21b，圆柱状电极组件22的正极极耳221a设置于圆柱状电极组件22的第一端22a并与正极端子214a连接，圆柱状电极组件22的负极极耳222a设置于圆柱状电极组件22的第二端22b并与负极端子214b连接。
应理解，六面体外壳21包括6个壁：21a、21b、21c、21d、21e与21f，其中，该六个壁可分为相邻设置的壁与相对设置的壁。相邻设置的壁例如：第一壁21a与第三壁21c，相对设置的壁例如第一壁21a与第二壁21b。示例性地，六面体外壳21中，若以两个相对设置的壁(如第一壁21a与第二壁21c)为六面体的顶壁和底壁，则剩余四个壁(如第三壁21c、第四壁21d、第五壁21e、第六壁21f)为六面体的侧壁。优选地，六面体外壳21中相邻设置的两个壁互相垂直。
具体地，电极组件22卷绕成圆柱状结构设置于六面体外壳21中，电极组件22的极耳221a与222a分别位于圆柱体的两端，分别与六面体外壳上相对设置的第一壁21a与第二壁21b上的电极端子214a与214b连接。
图5为图4中的电池单体20沿A-A’方向上的截面图。优选地，在一个实施例中，如图5所示，圆柱状电极组件22与六面体外壳21上与圆柱体轴向平行的四个壁(21c、21d、21e、21f)相切。
本实施例的技术方案中，在六面体外壳21中采用圆柱状电极组件22组装得到电池单体20。首先，圆柱状电极组件22的正极极耳221a与负极极耳222a分别与六面体外壳21相对设置的两壁21a与21b上的正极端子214a和负极端子214b连接，从而使得六面体状的电池单体20的正、负极能够从相对设置的第一壁21a和第二壁21b引出，六面体外壳21与圆柱状电极组件22的设置使得电极组件22与外壳21的接触面积减小，当电极组件22发生热失控时，电极组件22与外壳21之间仅依靠圆柱体与六面体相切的位置传热，减小了电极组件22的热扩散，从而降低了一个电池单体20热失控引发多个电池单体20热失控的可能性，提高了电池单体20的安全性能并延长了电池10的使用寿命。其次，圆柱状电极组件22的极耳221a和222a分别在圆柱的两端(22a与22b)与相对设置的第一壁21a与第二壁21b上的电极端子214连接，无需将极耳221a和222a绕至其他壁，提高了电池单体20内部的空间利用率。另外，圆柱状电极组件22的极耳221a和222a设置于圆柱的两端(22a与22b)，因此在加工过程中无需切模、卷绕对齐，有效提高了电池单体20的生产效率并降低了制造成本。最后，六面体外壳21中除容纳圆柱状电极组件22外还具有剩余空间，能够储存电极组件22在电化学反应中产生的气体，避免该气体导致电池单体20鼓包或破损从而造成安全问题，提高电池单体20的安全性能。
可选地，如图4所示，在一个实施例中，正极极耳221a通过第一连接件23a与正极端子214a连接，负极极耳222a通过第二连接件23b与负极端子214b连接。
本实施例中，极耳221a和222a通过连接件23与电极端子214连接，一方面，在无需焊接加工的情况下，连接件23能够使极耳221a和222a与电极端子214a和214b实现电连接，便于电池单体20的生产加工；另一方面，圆柱状电极组件22的正极极耳221a与负极极耳222a分别设置于圆柱的两端22a与22b，电极端子214a和214b也分别设置于六面体外壳21相对设置的壁21a与21b上，使得连接件23的转接距离较短，能够节省连接件23占用的空间，提高电池单体20内部的空间利用率。
可选地，在一个实施例中，正极极耳221a与正极端子214a直接连接，负极极耳222a与负极端子214b直接连接。
具体地，正极极耳221a与负极极耳222a可以通过揉平或整平等工艺在圆柱状电极组件22的两端形成连接区域，连接区域直接连接即通过焊接、铆接等方式使极耳221a和222a与电极端子214a和214b实现电连接。
本实施例中，通过避免连接件23的使用，进一步节省了电池单体20内部的连接件23占用的空间，进一步提高了电池单体20内部的空间利用率。
图6是本申请电池单体20的另一结构示意图。图7是图6所示的电池单体20沿A-A’方向上的截面图。
可选地，如图6所示，在一个实施例中，电池单体20包括：多个圆柱状电极组件22，多个圆柱状电极组件22在六面体外壳21中沿第一方向并列设置，第一方向平行于第一壁21a。
具体地，一个六面体外壳21中设置有多个圆柱状电极组件22时，多个圆柱状电极组件22沿平行于第一壁21a或第二壁21b的方向并列设置，多个圆柱状电极组件22的多个正极耳221a可以分别与正极端子214a连接，也可以通过揉平等工艺整形为一个整体与正极端子214a连接，负极极耳同理。优选地，一个电池单体20包括1-5个电极组件22。
本实施例中，多个圆柱状电极组件22在外壳21中无堆叠且并列放置，因此，在圆柱状电极组件22的轴向平行于水平面的放置状态下，电极组件22的在电解液中的浸润情况较为一致，提升了电极组件22的一致性，从而提高了电池单体20的电化学性能；另外，多个电极组件22并列设置使得每个圆柱状电极组件22之间、每个圆柱状电极组件22与外壳21之间的接触面积均很小，因此，在一个电极组件22热失控时，热扩散较小，不易通过一个电极组件22传递至另一个电极组件22从而导致电池单体20热失控，提高了电池单体20的安全性能并延长了电池10的使用寿命。
可选地，在一个实施例中，如图8所示，外壳21包括：壳体211和端盖212，壳体21具有至少一个开口，端盖212盖合开口，第一壁21a和/或第二壁21b为端盖212。
示例性地，若第一壁21a为端盖212，在加工过程中，六面体外壳的第二壁21b、第三壁21c、第四壁21d、第五壁21e以及第六壁21f被加工成具有一个开口的中孔六面体结构，即壳体211具有5个壁，第一壁21a能够盖合开口形成外壳21，开口能够使得电极组件安装与外壳中并为端盖与电极组件的加工提供操作空间。电极组件22从开口处安装进壳体211，并在开口处与第一壁21a一起通过常规的加工方式以形成电连接；电极组件22与第二壁21b则通过穿透焊接或其他穿透性加工方式形成电连接。
优选地，第一壁21a和第二壁21b均为端盖212，设置于壳体21的两端。
具体地，在加工过程中，六面体外壳的第三壁21c、第四壁21d、第五壁21e以及第六壁21f被加工成中空六面体结构的四个侧壁形成壳体211，第一壁21a和第二壁21b均为端盖212，用于盖合壳体211的开口形成外壳21。
本实施例中，外壳21具有两个相对设置的端盖212，六面体外形的电池单体20的正、负极从相对设置的两个面引出，使得电池单体20的电极端子214能够在垂直于端盖212的方向上直接连接，无需汇流部件，从而节省在垂直于端盖212方向上组装电池单体20的空间，并且，壳体211具有两个开口，更加方便电池单体的加工，同时帮助提高电池10内部的空间利用率。
可选地，在一个实施例中，壳体211包括侧壁和底壁，侧壁和底壁相邻设置，底壁为壳体211面积最大的壁。
示例性地，如图5或图7所示，组成壳体211的四个壁包括两个侧壁21c与21e，一个底壁21d和一个顶壁21e，底壁21d与顶壁21e面积相等，为壳体211面积最大的壁。
本实施例中，将电池单体21的壳体211中面积最大的壁作为底壁21d，即电池单体21以平躺的方式组装于电池10中，此放置状态下圆柱状电极组件22的轴向平行于底壁21d，即圆柱状电极组件22的轴向平行于水平面，当存在多个圆柱状电极组件22时，电极组件22之间并列设置无堆叠，帮助提高电极组件22的一致性。
可选地，在一个实施例中，圆柱状电极组件22包括：正极极片、负极极片以及设置于正极极片与负极极片之间的间隔结构，间隔结构用于构造正极极片与负极极片之间的间隔，该间隔用于吸收柱状电极组件22的膨胀变形。
具体地，间隔结构可以通过电极极片或隔膜上的结构构造，使得卷绕成圆柱状的电极组件22内部具有预留空间；也可以通过在极片或隔膜上设置其他结构构造。例如，可以通过在电极极片或隔膜上压印图案(pattern)，如凸点或凹点，在正极极片和负极极片之间构造出间隔结构，此时该间隔结构即极片或隔膜的一部分。再例如，可以通过在电极极片或隔膜上刷涂聚碳硅烷(Polysilacarbosilane,PCS)构造出间隔结构。
本实施例中，圆柱状电极组件22的极片之间设置有间隔结构，间隔结构能够在将极片卷绕成圆柱状电极组件22的过程中使得极片与极片之间形成预留空间，因此，电极组件22在电化学反应中发生膨胀变形后，该预留空间能够容纳电极组件22的膨 胀，从而使得圆柱状电极组件22能够向内部膨胀，减小电极组件22向外膨胀的程度，降低了电极组件22膨胀变形对壳体211的影响，使得壳体211的底壁21d与顶壁21e无需采用额外的端板增加电池单体20的强度，降低电池单体20制造成本的同时提高电池单体20的稳定性与安全性。
可选地，在一个实施例中，壳体211沿轴向的长度h与沿第二方向的长度t满足下式：
h＝n*t’
其中，n为圆柱状电极组件22的数量，n≥1，t’＝t±20mm，第二方向垂直于轴向和第一方向。
具体地，第二方向即垂直于底壁21d的方向。本实施例中，通过配置壳体的参数，能够在六面体外壳21中为圆柱状电极组件22预留部分空间，进一步减小电极组件22膨胀变形对外壳21的影响。
可选地，在一个实施例中，圆柱状电极组件22的直径D满足下式：
D＝t–c1
其中，t为壳体211沿第二方向的长度，0.01mm≤c1≤5mm，优选0.8mm≤c1≤2mm。
可选地，在一个实施例中，壳体21沿第一方向的长度为150-1200mm，优选为280-450mm。
上文结合图4至图8对本申请实施例中的电池单体20进行了介绍，下面结合图9至图12介绍本申请实施例的电池10中，多个电池单体20在箱体100中的排列方式。
图9为本申请一种电池10的示意性俯视图。图10为图9中的电池10沿A-A’方向的示意性截面图。
电池10包括：多个电池单体20，以及箱体100，箱体100用于容纳多个电池单体20。
本实施例中，电池10由能够降低热扩散、提高安全性能的电池单体20组装得到，帮助避免电池10的热扩散并提高电池10的安全性能。
可选地，多个电池单体20中的第一电池单体201和第二电池单体202在箱体100中沿轴向排列，第一电池单体201的负极端子214b与所述第二电池单体202的正极端子214a连接。
换言之，多个电池单体20在箱体100中沿轴向排布成列，沿第一方向排布成 行。在轴向上，第一电池单体201的负极端子214b与第二电池单体202的正极端子214a连接。即多个电池单体20在轴向上采用电极端子214之间直接连接的方式实现多行电池单体20在轴向上的组装。在垂直于轴向的第一方向上通过汇流部件连接实现多列电池单体20在垂直于轴向上的组装。
本实施例中，由于六面体状的电池单体20的正、负极端子214a与214b位于相对设置的两个端盖21a和21b上，故电池10中的电池单体20在沿轴向上能够通过电极端子214直接连接，从而省去了轴向上电池单体20之间的汇流部件，提高了电池10内部的空间利用率。
可选地，如图9所示，在一个实施例中，多个电池单体20在轴向上排布的行数小于多个电池单体20在第一方向上排布的列数。
图11为本申请一种电池10的另一示意性俯视图。图12为图11中的电池10沿A-A’方向的示意性截面图。
作为一种可替代的实施例，如图11所示，多个电池单体20在轴向上排布的行数大于或等于多个电池单体20在第一方向上排布的列数。
可选地，多个电池单体20中的第一电池单体201和第二电池单体202在箱体100中沿第二方向排列，第二方向垂直于轴方向并垂直于第一方向。
具体地，参见图10与图12，电池10在第二方向上包括多层电池单体20。优选地，电池10在第二方向上包括两层电池单体20。应理解，箱体中的多个电池单体可以既具有沿轴向上的排布，也具有沿第二方向上的排布，也可以仅具有其中一种排布，本申请实施例对此不做限制。另外，第一电池单体201的底壁21d与第二电池单体202的顶壁21e可以直接接触，也可以在第一电池单体201的底壁21d与第二电池单体202的顶壁21e直接设置结构胶或隔热垫等。
本实施例的技术方案中，电池单体沿第二方向排列，即多个电池单体通过面积最大的壁互相堆叠组成电池，使得电池中能够容纳更多的电池单体，提高电池内部的空间利用率。
可选地，在一个实施例中，电池10包括：水冷板122，设置于箱体100内部且与电池单体20的第三壁21c附接，第三壁21c平行于轴向并与第一壁21a和第二壁21b连接。
应理解，第三壁21c可以是壳体211的顶壁或底壁，也可以是壳体211的侧壁。 优选地，水冷板122附接于壳体211的顶壁或底壁，即面积最大的壁。当电池10如图10或图12所示，在第二方向上包括多层电池单体20时，水冷板122设置于电池单体20的层间。
本实施例中，通过在电池10中设置水冷板122进一步减小热失控带来的热扩散，并通过增大水冷板211与电池单体20的接触面积，提高水冷板122对电池10的降温效果，避免电池单体20温度过高引发的安全问题，帮助提高电池10的安全性能与寿命。
可选地，在一个实施例中，箱体100在第二方向上的长度H满足下式：
H–c＝m*t
其中，m为所述多个电池单体20在第二方向上排列的层数，t为所述壳体沿所述第二方向的长度，10mm≤c≤40mm，1≤m。优选地，15mm≤c≤25mm，2≤m≤8。
如图13所示，本申请一个实施例还提供了一种用电装置1300，该用电装置1300可以包括前述各实施例中的电池10，电池10用于向该用电装置1300提供电能。
可选地，用电装置1300可以为车辆1、船舶或航天器。
上文描述了本申请实施例的电池单体20、电池10及用电装置1300，下面将描述本申请实施例的制备电池单体20的方法和设备，其中未详细描述的部分可参见前述各实施例。
图14示出了本申请一个实施例的制备电池单体20的方法300的示意性流程图。如图14所示，该方法400可以包括如下步骤。
S401，提供六面体外壳21，外壳21具有相对设置的第一壁21a和第二壁21b，第一壁21a上设置有正极端子214a，第二壁21b上设置有负极端子214b。
S402，提供圆柱状电极组件22，圆柱状电极组件22设置于外壳21中，圆柱状电极组件22的轴向垂直于第一壁21a或第二壁21b，圆柱状电极组件22的正极极耳221a设置于圆柱状电极组件22的第一端22a并与正极端子214a连接，圆柱状电极组件22的负极极耳222a设置于圆柱状电极组件22的第二端22b并与负极端子214b连接。
S403，将圆柱状电极组件22安装于六面体外壳21中。
图15示出了本申请一个实施例的制备电池单体20的装置500的示意性框图。如图15所示，制备电池的装置500可以包括：提供模块501和安装模块502。
其中，提供模块501用于提供六面体外壳21，外壳21具有相对设置的第一壁 21a和第二壁21b，第一壁21a上设置有正极端子214a，第二壁21b上设置有负极端子214b；提供圆柱状电极组件22，圆柱状电极组件22设置于外壳21中，圆柱状电极组件22的轴向垂直于第一壁21a或第二壁21b，圆柱状电极组件22的正极极耳221a设置于圆柱状电极组件22的第一端22a并与正极端子214a连接，圆柱状电极组件22的负极极耳222a设置于圆柱状电极组件22的第二端22b并与负极端子214b连接。
安装模块502用于将圆柱状电极组件22安装于六面体外壳21中。
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 (17)

  1. 一种电池单体，其特征在于，所述电池单体包括：
    六面体外壳，所述外壳具有相对设置的第一壁和第二壁，所述第一壁上设置有正极端子，所述第二壁上设置有负极端子；
    圆柱状电极组件，所述圆柱状电极组件设置于所述外壳中，所述圆柱状电极组件的轴向垂直于所述第一壁或所述第二壁，所述圆柱状电极组件的正极极耳设置于所述圆柱状电极组件的第一端并与所述正极端子连接，所述圆柱状电极组件的负极极耳设置于所述圆柱状电极组件的第二端并与所述负极端子连接。
  2. 根据权利要求1所述的电池单体，其特征在于，所述正极极耳通过第一连接件与所述正极端子连接，所述负极极耳通过第二连接件与所述负极端子连接。
  3. 根据权利要求1所述的电池单体，其特征在于，所述电池单体包括：多个所述圆柱状电极组件，多个所述圆柱状电极组件在所述六面体外壳中沿第一方向并列设置，所述第一方向平行于所述第一壁。
  4. 根据权利要求3所述的电池单体，其特征在于，所述外壳包括：壳体和端盖，所述壳体具有至少一个开口，所述端盖盖合所述开口，所述第一壁和/或所述第二壁为所述端盖。
  5. 根据权利要求4所述的电池单体，其特征在于，所述壳体包括侧壁和底壁，所述侧壁和所述底壁相邻设置，所述底壁为所述壳体面积最大的壁。
  6. 根据权利要求1-5中任一项所述的电池单体，其特征在于，所述圆柱状电极组件包括：正极极片、负极极片以及设置于所述正极极片与所述负极极片之间的间隔结构，所述间隔结构用于构造所述正极极片与所述负极极片之间的间隔，所述间隔用于吸收所述圆柱状电极组件的膨胀变形。
  7. 根据权利要求4或5所述的电池单体，其特征在于，所述壳体沿所述轴向的长度h与沿第二方向的长度t满足下式：
    h＝n*t’
    其中，n为所述圆柱状电极组件的数量，n≥1，t’＝t±20mm，所述第二方向垂直于所述轴向和所述第一方向。
  8. 根据权利要求7所述的电池单体，其特征在于，所述圆柱状电极组件的直径D满足下式：
    D＝t–c1
    其中，t为所述壳体沿所述第二方向的长度，0.01mm≤c1≤5mm。
  9. 根据权利要求3-8中任一项所述的电池单体，其特征在于，所述壳体沿所述第一方向的长度为150-1200mm。
  10. 一种电池，其特征在于，包括：
    多个如权利要求1-9中任一项所述的电池单体；
    箱体，用于容纳多个所述电池单体。
  11. 根据权利要求10所述的电池，其特征在于，多个所述电池单体中的第一电池单体和第二电池单体在所述箱体中沿所述轴向排列，所述第一电池单体的负极端子与所述第二电池单体的正极端子连接。
  12. 根据权利要求10所述的电池，其特征在于，多个所述电池单体中的第一电池单体和第二电池单体在所述箱体中沿所述第二方向排列。
  13. 根据权利要求10所述的电池，其特征在于，所述电池包括：
    水冷板，设置于所述箱体内部且与所述电池单体的第三壁附接，所述第三壁平行于所述轴向并与所述第一壁和所述第二壁连接。
  14. 根据权利要求12所述的电池，其特征在于，所述箱体在所述第二方向上的长度H满足下式：
    H–c＝m*t
    其中，m为所述多个所述电池单体在所述第二方向上排列的层数，t为所述壳体沿所述第二方向的长度，10mm≤c≤40mm，1≤m≤8。
  15. 一种用电装置，其特征在于，包括如权利要求10-14中任一项所述的电池，所述电池用于为所述用电装置供电。
  16. 一种电池单体的制备方法，其特征在于，包括：
    提供六面体外壳，所述外壳具有相对设置的第一壁和第二壁，所述第一壁上设置有正极端子，所述第二壁上设置有负极端子；
    提供圆柱状电极组件，所述圆柱状电极组件设置于所述外壳中，所述圆柱状电极组件的轴向垂直于所述第一壁或所述第二壁，所述圆柱状电极组件的正极极耳设置于 所述圆柱状电极组件的第一端并与所述正极端子连接，所述圆柱状电极组件的负极极耳设置于所述圆柱状电极组件的第二端并与所述负极端子连接；
    将所述圆柱状电极组件安装于所述六面体外壳中。
  17. 一种电池单体的制备装置，其特征在于，包括：
    提供模块，用于提供六面体外壳，所述外壳具有相对设置的第一壁和第二壁，所述第一壁上设置有正极端子，所述第二壁上设置有负极端子；提供圆柱状电极组件，所述圆柱状电极组件设置于所述外壳中，所述圆柱状电极组件的轴向垂直于所述第一壁或所述第二壁，所述圆柱状电极组件的正极极耳设置于所述圆柱状电极组件的第一端并与所述正极端子连接，所述圆柱状电极组件的负极极耳设置于所述圆柱状电极组件的第二端并与所述负极端子连接；
    安装模块，用于将所述圆柱状电极组件安装于所述六面体外壳中。
PCT/CN2021/132869 2021-11-24 2021-11-24 电池单体、电池、用电装置、制备电池单体的方法和装置 WO2023092344A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP21965082.7A EP4428992A1 (en) 2021-11-24 2021-11-24 Battery cell, battery, electric apparatus, and method and apparatus for preparing battery cell
CN202190000994.0U CN220984649U (zh) 2021-11-24 2021-11-24 电池单体、电池、用电装置、制备电池单体的装置
PCT/CN2021/132869 WO2023092344A1 (zh) 2021-11-24 2021-11-24 电池单体、电池、用电装置、制备电池单体的方法和装置
US18/669,135 US20240322302A1 (en) 2021-11-24 2024-05-20 Battery cell, battery, electric apparatus, and preparation method and apparatus of battery cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/132869 WO2023092344A1 (zh) 2021-11-24 2021-11-24 电池单体、电池、用电装置、制备电池单体的方法和装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/669,135 Continuation US20240322302A1 (en) 2021-11-24 2024-05-20 Battery cell, battery, electric apparatus, and preparation method and apparatus of battery cell

Publications (1)

Publication Number Publication Date
WO2023092344A1 true WO2023092344A1 (zh) 2023-06-01

Family

ID=86538683

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/132869 WO2023092344A1 (zh) 2021-11-24 2021-11-24 电池单体、电池、用电装置、制备电池单体的方法和装置

Country Status (4)

Country Link
US (1) US20240322302A1 (zh)
EP (1) EP4428992A1 (zh)
CN (1) CN220984649U (zh)
WO (1) WO2023092344A1 (zh)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003308873A (ja) * 2002-04-17 2003-10-31 Sony Corp 非水電解質二次電池
JP2008016210A (ja) * 2006-07-03 2008-01-24 Sony Corp 二次電池及びその製造方法
JP2008235049A (ja) * 2007-03-22 2008-10-02 Sony Corp 二次電池およびその製造方法
CN101689617A (zh) * 2007-06-11 2010-03-31 松下电器产业株式会社 电池组件以及电池搭载设备
CN201438490U (zh) * 2009-04-30 2010-04-14 天津市捷威动力工业有限公司 一种锂离子动力电池
CN202127067U (zh) * 2011-06-09 2012-01-25 珠海金峰航电源科技有限公司 动力锂离子电池
CN111834700A (zh) * 2020-07-21 2020-10-27 山东大学 电动汽车动力电池热管理和压力管理系统
CN113097659A (zh) * 2021-04-13 2021-07-09 欣旺达电动汽车电池有限公司 电极组件、单体电池及单体电池的装配方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003308873A (ja) * 2002-04-17 2003-10-31 Sony Corp 非水電解質二次電池
JP2008016210A (ja) * 2006-07-03 2008-01-24 Sony Corp 二次電池及びその製造方法
JP2008235049A (ja) * 2007-03-22 2008-10-02 Sony Corp 二次電池およびその製造方法
CN101689617A (zh) * 2007-06-11 2010-03-31 松下电器产业株式会社 电池组件以及电池搭载设备
CN201438490U (zh) * 2009-04-30 2010-04-14 天津市捷威动力工业有限公司 一种锂离子动力电池
CN202127067U (zh) * 2011-06-09 2012-01-25 珠海金峰航电源科技有限公司 动力锂离子电池
CN111834700A (zh) * 2020-07-21 2020-10-27 山东大学 电动汽车动力电池热管理和压力管理系统
CN113097659A (zh) * 2021-04-13 2021-07-09 欣旺达电动汽车电池有限公司 电极组件、单体电池及单体电池的装配方法

Also Published As

Publication number Publication date
US20240322302A1 (en) 2024-09-26
CN220984649U (zh) 2024-05-17
EP4428992A1 (en) 2024-09-11

Similar Documents

Publication Publication Date Title
WO2024093100A1 (zh) 电极极片、电极组件、电池单体、电池和用电设备
WO2023065923A1 (zh) 电池单体、电池和用电设备
EP4148876A1 (en) Battery, electrical device, and method and device for preparing battery
WO2023186034A1 (zh) 端盖、电池单体、电池及用电设备
WO2023160034A1 (zh) 电池箱体上盖、电池箱体、电池及用电设备
WO2023025104A1 (zh) 电池单体、电池以及用电装置
US20240283109A1 (en) Battery cell, method and system for manufacturing battery cell, battery and electrical apparatus
US20240222766A1 (en) Battery, electric apparatus, and method and apparatus for manufacturing battery
US20240088477A1 (en) Battery, power consumption device, and method and device for producing battery
WO2023155207A1 (zh) 电池、用电设备、制备电池的方法和设备
WO2023133748A1 (zh) 电池模块、电池、用电设备、制备电池的方法和设备
WO2023092344A1 (zh) 电池单体、电池、用电装置、制备电池单体的方法和装置
KR20230129053A (ko) 배터리, 전기 장치, 배터리 제조 방법 및 장치
WO2023082192A1 (zh) 电池单体、电池、用电装置、制备电池的方法和装置
WO2023173721A1 (zh) 电池单体、电池模组、电池和用电装置
WO2024145827A1 (zh) 电池单体、电池及用电装置
WO2023065366A1 (zh) 电池、用电设备、制备电池单体的方法和设备
CN117199644B (zh) 电池单体、电池以及用电装置
WO2023123048A1 (zh) 电池、用电设备、制备电池的方法和设备
WO2023092529A1 (zh) 外壳及其制备方法和系统、电池单体、电池、用电装置
WO2024183069A1 (zh) 用于电池的支架组件、电池及用电设备
WO2023130238A1 (zh) 电池单体及其制造方法和制造系统、电池以及用电装置
WO2023159487A1 (zh) 电池、用电设备、制备电池的方法和设备
WO2024178553A1 (zh) 电池单体、电池及用电装置
WO2023155209A1 (zh) 电池、用电设备、制备电池的方法和设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21965082

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202190000994.0

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2021965082

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2021965082

Country of ref document: EP

Effective date: 20240607

NENP Non-entry into the national phase

Ref country code: DE