WO2023155211A1 - 电池、用电设备、制备电池的方法和设备 - Google Patents

电池、用电设备、制备电池的方法和设备 Download PDF

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Publication number
WO2023155211A1
WO2023155211A1 PCT/CN2022/077152 CN2022077152W WO2023155211A1 WO 2023155211 A1 WO2023155211 A1 WO 2023155211A1 CN 2022077152 W CN2022077152 W CN 2022077152W WO 2023155211 A1 WO2023155211 A1 WO 2023155211A1
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WO
WIPO (PCT)
Prior art keywords
battery
separator
wall
battery cells
present application
Prior art date
Application number
PCT/CN2022/077152
Other languages
English (en)
French (fr)
Inventor
孙占宇
龙超
王鹏
陈兴地
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.)
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to EP22719768.8A priority Critical patent/EP4261997A1/en
Priority to PCT/CN2022/077152 priority patent/WO2023155211A1/zh
Priority to JP2022529361A priority patent/JP2024510855A/ja
Priority to KR1020227016437A priority patent/KR20230126175A/ko
Priority to CN202280006668.XA priority patent/CN116325317A/zh
Priority to US17/750,668 priority patent/US20230268604A1/en
Priority to CN202380008512.XA priority patent/CN116848705A/zh
Priority to PCT/CN2023/070125 priority patent/WO2023155620A1/zh
Priority to CN202320014347.6U priority patent/CN219203386U/zh
Priority to PCT/CN2023/070131 priority patent/WO2023155622A1/zh
Priority to CN202320014404.0U priority patent/CN219575742U/zh
Priority to CN202320014214.9U priority patent/CN219203335U/zh
Priority to CN202320014583.8U priority patent/CN219203337U/zh
Priority to CN202380008508.3A priority patent/CN116491016A/zh
Priority to PCT/CN2023/070135 priority patent/WO2023155624A1/zh
Priority to PCT/CN2023/070133 priority patent/WO2023155623A1/zh
Priority to CN202380008507.9A priority patent/CN116745978A/zh
Priority to CN202380008511.5A priority patent/CN116724443A/zh
Priority to PCT/CN2023/070126 priority patent/WO2023155621A1/zh
Priority to CN202320014354.6U priority patent/CN219203336U/zh
Priority to PCT/CN2023/070136 priority patent/WO2023155625A1/zh
Priority to CN202320014474.6U priority patent/CN220042013U/zh
Priority to CN202380008509.8A priority patent/CN116802897A/zh
Priority to CN202380008510.0A priority patent/CN116868417A/zh
Publication of WO2023155211A1 publication Critical patent/WO2023155211A1/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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • 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
    • H01M10/647—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
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/293—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—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
    • H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
    • 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

Definitions

  • the present application relates to the technical field of batteries, in particular to a battery, an electrical device, a method and a device for preparing a battery.
  • the space utilization rate inside the battery affects the power and energy density of the battery, which in turn affects the performance of the battery. How to improve the performance of batteries is an urgent technical problem in battery technology.
  • the present application provides a battery, an electrical device, a method and a device for preparing the battery, which can increase the energy density of the battery while ensuring the electrical insulation in the battery, thereby improving the performance of the battery.
  • a battery including: a plurality of battery cells arranged along a first direction; a separator extending along the first direction and connected to each of the plurality of battery cells The first wall of the two battery cells is connected, the first wall is the wall with the largest surface area among the battery cells, and the surface of the separator is provided with an insulating layer, wherein the separator is in the second direction.
  • the dimension T1 is less than 0.5 mm, and the second direction is perpendicular to the first wall.
  • the separator is arranged in the battery to be connected to the first wall with the largest surface area of each battery cell among a plurality of battery cells arranged in a row along the first direction, and the separator is perpendicular to the first wall
  • the dimension in the second direction is set to be smaller than 0.5mm.
  • Multiple battery cells are connected into a whole through separators. In this case, there is no need to set up side plates in the battery, and there is no need to set up beams and other structures, which can maximize the space utilization inside the battery; Thereby improving the energy density of the battery; by setting an insulating layer on the surface of the separator, the electrical connection between the separator and the battery cells is avoided. Therefore, the technical solutions of the embodiments of the present application can ensure the electrical insulation in the battery while improving the energy density of the battery, thereby improving the performance of the battery.
  • a dimension T1 of the partition in the second direction is not less than 0.05 mm. In this way, it can be avoided that the strength requirement of the battery cannot be met due to the size of the separator in the second direction being too small.
  • the area S1 of the surface of the separator connected to the first walls of the plurality of battery cells is the same as that of the separator of the plurality of battery cells.
  • the total area S2 of the first wall of the side connection satisfies: 0.25 ⁇ S1/S2 ⁇ 4.
  • the contact area between the first wall and the separator is too small to meet the strength requirements of the battery; when the value of S1/S2 is too large, that is, the area S1 of the surface of the separator connected to the first wall is much larger than multiple
  • the separator occupies too much space inside the battery, which is not conducive to improving the energy density of the battery; therefore, setting S1/ The value of S2 is 0.25-4, which can not only increase the energy density of the battery, but also improve the strength of the battery.
  • the dimension H1 of the separator and the dimension H2 of the first wall of the battery cell satisfy: 0.2 ⁇ H1/H2 ⁇ 2, the third The direction is perpendicular to the first direction and the second direction.
  • H1/H2 When H1/H2 is too small, that is, in the third direction, the size H1 of the separator is much smaller than the size H2 of the first wall of the battery cell, the contact area between the first wall and the separator is too small to meet the strength requirements of the battery ;
  • H1/H2 is too large, that is, in the third direction, the size H1 of the separator is much larger than the size H2 of the first wall of the battery cell, compared with the battery cell, the separator occupies too much space inside the battery, It is not conducive to improving the energy density of the battery, so setting the value of H1/H2 to 0.2 to 2 can not only increase the energy density of the battery, but also improve the strength of the battery.
  • the size L1 of the separator and the size L2 of the plurality of battery cells satisfy: 0.5 ⁇ L1/L2 ⁇ 2.
  • a dimension T2 of the insulating layer in the second direction satisfies: 0.01mm ⁇ T2 ⁇ 0.3mm.
  • T2 of the insulating layer in the second direction When the size T2 of the insulating layer in the second direction is too small, the insulating layer cannot effectively avoid the electrical connection between the battery cells and the separator, and the battery will have poor insulation. When the size T2 of the insulating layer in the second direction is too large , it will occupy too much space inside the battery, which is not conducive to improving the energy density of the battery. Therefore, setting the value of T2 to 0.01-0.3mm can not only improve the energy density of the battery, but also ensure the safety of the battery.
  • the voltage U of the battery and the dimension T2 of the insulating layer in the second direction satisfy: 0.01 ⁇ 10 -3 mm/V ⁇ T2/U ⁇ 3 ⁇ 10 -3 mm/V.
  • T2/U When T2/U is too small, that is, the size T2 of the insulating layer of the unit voltage in the second direction is too small, the insulating layer cannot effectively avoid the electrical connection between the battery cell and the separator, and the battery will have poor insulation, which poses a safety hazard
  • T2/U when T2/U is too large, that is, when the size T2 of the insulating layer of the unit voltage in the second direction is too large, it will occupy too much space inside the battery, which is not conducive to improving the energy density of the battery, so set the value of T2/U 0.01 ⁇ 10 -3 ⁇ 3 ⁇ 10 -3 mm/V, which can not only improve the energy density of the battery, but also ensure the safety of the battery.
  • the battery cell includes two first walls oppositely arranged in the second direction and two second walls oppositely arranged in the first direction, wherein , in the first direction, the second walls of two adjacent battery cells face each other.
  • the battery includes multiple columns of battery cells and multiple separators arranged in the first direction, wherein multiple columns of battery cells and multiple The partitions are arranged alternately in the second direction.
  • the first walls of the plurality of battery cells arranged along the first direction X in each row can be connected to the separator, and the plurality of battery cells arranged in each row along the first direction X can be connected as a whole through the separator, Thereby effectively improving the strength of the battery.
  • the battery includes a plurality of battery modules, and the battery module includes at least one column of a plurality of battery cells arranged along the first direction and at least one separator, and at least A row of battery cells and at least one separator are arranged alternately in the second direction.
  • the battery module includes at least one column of a plurality of battery cells arranged along the first direction and at least one separator, and at least A row of battery cells and at least one separator are arranged alternately in the second direction.
  • the battery module includes N columns of the battery cells and N-1 separators, the separators are arranged between two adjacent columns of the battery cells, N is an integer greater than 1. In this way, fewer separators can be provided in the battery, but at the same time it can be ensured that each battery cell can be connected to the separator.
  • a plurality of the battery modules are arranged along the second direction, and there are gaps between adjacent battery modules. This gap can provide expansion space for the battery cells.
  • the separator is bonded to the first wall.
  • the partition board is fixedly connected with the first wall by bonding, the structure is simple, and the processing and assembly are convenient.
  • an electric device including: the battery in the above first aspect or any possible implementation manner of the first aspect, where the battery is used to provide electric energy.
  • a method for preparing a battery including: providing a plurality of battery cells arranged along a first direction; providing a separator extending along the first direction and connecting with the plurality of batteries The first wall of each battery cell in the battery cell is connected, the first wall is the wall with the largest surface area in the battery cell, and the surface of the separator is provided with an insulating layer, wherein the separator is in the A dimension T1 in a second direction, which is perpendicular to the first wall, is less than 0.5 mm.
  • a device for preparing a battery including a module for performing the method of the third aspect above.
  • the separator is arranged in the battery to be connected to the first wall with the largest surface area of each battery cell among a plurality of battery cells arranged in a row along the first direction, and the separator is perpendicular to the first wall
  • the dimension in the second direction is set to be smaller than 0.5mm.
  • Multiple battery cells are connected into a whole through separators. In this case, there is no need to set up side plates in the battery, and there is no need to set up beams and other structures, which can maximize the space utilization inside the battery; Thereby improving the energy density of the battery; by setting an insulating layer on the surface of the separator, the electrical connection between the separator and the battery cells is avoided. Therefore, the technical solutions of the embodiments of the present application can improve the energy density of the battery while ensuring the electrical insulation in the battery, thereby improving the performance of the battery.
  • Fig. 1 is a schematic structural view of a vehicle disclosed in an embodiment of the present application
  • Fig. 2 is a schematic diagram of an exploded structure of a battery disclosed in an embodiment of the present application
  • Fig. 3 is a schematic diagram of an exploded structure of a battery cell disclosed in an embodiment of the present application.
  • Fig. 4 is a partial structural schematic diagram of a battery disclosed in an embodiment of the present application.
  • Fig. 5 is a partial structural schematic diagram of a battery disclosed in an embodiment of the present application.
  • Fig. 6 is a schematic diagram of a battery cell disclosed in an embodiment of the present application.
  • Fig. 7 is a partial structural schematic diagram of a battery disclosed in an embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of a battery module disclosed in an embodiment of the present application.
  • Fig. 9 is a schematic structural view of a battery disclosed in an embodiment of the present application.
  • FIG. 10 is a schematic flow chart of a method for preparing a battery according to an embodiment of the present application.
  • Fig. 11 is a schematic block diagram of a device for preparing a battery according to an embodiment of the present application.
  • first, second, third, etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance. “Vertical” is not strictly vertical, but within the allowable range of error. “Parallel” is not strictly parallel, but within the allowable range of error.
  • connection should be interpreted in a broad sense, for example, it can be a fixed connection or a flexible connection. Disassembled connection, or integral connection; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.
  • the battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, which are not limited in the embodiments of the present application.
  • the battery cell can be in the form of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application.
  • Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square square battery cells and pouch battery cells, which are not limited in this embodiment of the present application.
  • the battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • batteries mentioned in this application may include battery packs and the like.
  • Batteries generally include a case for enclosing one or more battery cells. The box can prevent liquid or other foreign objects from affecting the charging or discharging of the battery cells.
  • the battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive 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.
  • 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 isolation film can be polypropylene (PP) or 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.
  • 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.
  • 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 is further arranged in the electric device to provide electric energy for the electric device.
  • the embodiment of the present application provides a technical solution.
  • the surface area of each battery cell in the battery is provided with a separator and a row of multiple battery cells arranged along the first direction.
  • the first wall is connected, and the size of the partition in the second direction perpendicular to the first wall is set to be less than 0.5 mm.
  • Multiple battery cells are connected into a whole through separators. In this case, there is no need to set up side plates in the battery, and there is no need to set up beams and other structures, which can maximize the space utilization inside the battery; Thereby improving the energy density of the battery; by setting an insulating layer on the surface of the separator, the electrical connection between the separator and the battery cells is avoided. Therefore, the technical solutions of the embodiments of the present application can improve the energy density of the battery while ensuring the electrical insulation in the battery, thereby improving the performance of the battery.
  • batteries such as mobile phones, portable devices, notebook computers, battery cars, electric toys, electric tools, electric vehicles, ships and spacecraft, etc.
  • spacecraft include Airplanes, rockets, space shuttles and spaceships, etc.
  • FIG. 1 it is a schematic structural diagram of a vehicle 1 according to an embodiment of the present application.
  • 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 Extended range cars, etc.
  • a motor 40 , a controller 30 and a battery 10 can be arranged inside the vehicle 1 , and the controller 30 is used to control the battery 10 to supply power to the motor 40 .
  • 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 10 may include multiple battery cells.
  • FIG. 2 which is a schematic structural diagram of a battery 10 according to an embodiment of the present application
  • the battery 10 may include a plurality of battery cells 20 .
  • the battery 10 may further include a box body 11 , the inside of which is a hollow structure, and a plurality of battery cells 20 are accommodated in the box body 11 .
  • a plurality of battery cells 20 are placed in the case 11 after being connected in parallel, in series or in parallel.
  • 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 box 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. Since the number of battery cells 20 included in each battery 10 may be large, for the convenience of installation, the battery cells 20 may be arranged in groups, and each group of battery cells 20 constitutes a battery module. The number of battery cells 20 included in the battery module is not limited and can be set according to requirements.
  • a battery may include a plurality of battery modules, which may be connected in series, in parallel or in parallel.
  • the battery cell 20 includes one or more electrode assemblies 22 , a casing 211 and a cover plate 212 .
  • the housing 211 and the cover plate 212 form the housing or battery compartment 21 .
  • the walls of the casing 211 and the cover plate 212 are both called the walls of the battery cell 20 , wherein for the rectangular parallelepiped battery cell 20 , the walls of the casing 211 include a bottom wall and four side walls.
  • the housing 211 depends on the combined shape of one or more electrode assemblies 22.
  • the housing 211 can be a hollow cuboid or cube or cylinder, and one of the surfaces of the housing 211 has an opening so that one or more electrodes Assembly 22 may be placed within housing 211 .
  • one of the planes of the housing 211 is an open surface, that is, the plane does not have a wall so that the inside and outside of the housing 211 communicate.
  • the casing 211 can be a hollow cylinder, the end surface of the casing 211 is an open surface, that is, the end surface does not have a wall so that the inside and outside of the casing 211 communicate.
  • the cover plate 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 cover plate 212 .
  • the cover plate 212 is usually in the shape of a flat plate, and two electrode terminals 214 are fixed on the flat plate surface of the cover plate 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 referred to as a current collecting member 23 , which is located between the cover plate 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 tabs 221a of one or more electrode assemblies 22 are connected to one electrode terminal through one connection member 23
  • the second tabs 222a of one or more electrode assemblies 22 are connected to another electrode terminal through another connection member 23 .
  • the positive electrode terminal 214 a is connected to the positive electrode tab through one connection member 23
  • the negative electrode terminal 214 b is connected to the negative electrode tab through the other connection 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 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 pressure relief mechanism 213 may be various possible pressure relief structures, which are not limited in this embodiment of the present application.
  • the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold; and/or, the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism configured to rupture when the internal air pressure of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value.
  • FIG. 4 shows a schematic structural diagram of a battery 10 according to an embodiment of the present application.
  • the battery 10 includes a plurality of battery cells 20 arranged along the first direction X and a separator 101 , the separator 101 extends along the first direction X and is connected to the plurality of battery cells 20
  • the first wall 201 of each battery cell 20 is connected, and the first wall 201 is the wall with the largest surface area among the battery cells 20 .
  • the first wall 201 of each battery cell 20 with the largest surface area among the plurality of battery cells 20 is connected to the separator 101, and the plurality of battery cells 20 are connected as a whole through the separator 101.
  • the battery 10 may not be provided with side plates, and may not be provided with structures such as beams, which can maximize the space utilization rate inside the battery 10 and increase the energy density of the battery 10 .
  • the dimension T1 of the partition 101 in the second direction Y is less than 0.5 mm, and the second direction Y is perpendicular to the first wall 201 .
  • the size of the separator 101 in the second direction Y can be avoided from occupying too much space inside the battery 10 , and the utilization rate of the space inside the battery 10 can be further improved, thereby increasing the energy density of the battery 10 .
  • an insulating layer 102 is provided on the surface of the separator 101 to prevent the electrical connection between the separator 101 and the battery cells 20 and improve the safety of the battery 10 .
  • the insulating layer 102 may be an insulating film bonded on the surface of the separator 101 or an insulating varnish coated on the surface of the separator 101 .
  • the dimension T2 of the insulating layer 102 in the second direction Y satisfies: 0.01mm ⁇ T2 ⁇ 0.3mm.
  • the insulating layer 102 cannot effectively prevent the electrical connection between the battery cells 20 and the separator 101, and the battery 10 will have poor insulation, which poses a safety hazard.
  • the size T2 of 102 in the second direction Y is too large, it will occupy too much space inside the battery 10, which is not conducive to improving the energy density of the battery 10. Therefore, setting the value of T2 to 0.01-0.3mm can improve the battery 10. energy density, and can ensure the safety of the battery 10.
  • the voltage U of the battery 10 and the dimension T2 of the insulating layer 102 in the second direction Y satisfy: 0.01 ⁇ 10 ⁇ 3 mm/V ⁇ T2/U ⁇ 3 ⁇ 10 ⁇ 3 mm/V.
  • the insulating effect of the insulating layer 102 is not only related to the thickness of the insulating layer 102, but also related to the thickness of the insulating layer 102 corresponding to the unit voltage.
  • T2/U is too small, that is, the dimension T2 of the insulating layer 102 in the second direction Y of the unit voltage If it is too small, the insulating layer 102 cannot effectively avoid the electrical connection between the battery cells 20 and the separator 101, and the battery 10 will have poor insulation, which will pose a safety hazard.
  • T2/U When T2/U is too large, that is, the insulating layer 102 with a unit voltage of When the dimension T2 in the two directions Y is too large, it will occupy too much space inside the battery 10, which is not conducive to improving the energy density of the battery 10, so the value of T2/U is set to 0.01 ⁇ 10 -3 ⁇ 3 ⁇ 10 -3 mm /V, which can not only increase the energy density of the battery 10, but also ensure the safety of the battery 10.
  • the dimension T1 of the separator 101 in the second direction Y is not less than 0.05 mm. In this way, it can be avoided that the size of the separator 101 in the second direction is too small, that is, the thickness of the separator 101 is small, and the rigidity of the separator 101 is too small to meet the strength requirement of the battery 10 .
  • the area S1 of the surface of the separator 101 connected to the first wall 201 of the plurality of battery cells 20 is the same as the area S1 of the surface of the plurality of battery cells 20 connected to the separator.
  • H1 is the size of the separator 101 in the third direction Z
  • L1 is the size of the separator 101 in the first direction X
  • H2 is the size of a single battery cell 20 in the third direction Z
  • L2 is the sum of the dimensions of the plurality of battery cells 20 in the first direction X.
  • the size H1 of the separator 101 and the size H2 of the first wall 201 of the battery cell 20 satisfy: 0.2 ⁇ H1/H2 ⁇ 2, the The third direction Z is perpendicular to the first direction X and the second direction Y.
  • the size L1 of the separator 101 and the size L2 of the plurality of battery cells 20 satisfy: 0.5 ⁇ L1/L2 ⁇ 2.
  • the battery cell 20 includes two first walls 201 oppositely arranged in the second direction Y and two second walls 202 oppositely arranged in the first direction X, Wherein, in the first direction X, the second walls 202 of two adjacent battery cells 20 face each other.
  • the battery 10 includes multiple columns of battery cells 20 and multiple separators 101 arranged along the first direction X, wherein the multiple columns of battery cells 20 and multiple separators The plates 101 are arranged alternately in the second direction Y.
  • the first walls 201 of the plurality of battery cells 20 arranged along the first direction X in each row can be connected to the separator 101, and the plurality of battery cells 20 arranged in each row along the first direction X can pass through the separator 101 are connected as a whole, thereby effectively improving the strength of the battery 10 .
  • the battery 10 includes a plurality of battery modules 100. As shown in FIG. At least one row of battery cells 20 and at least one separator 101 are arranged alternately in the second direction Y.
  • the battery module 100 includes N rows of battery cells 20 and N-1 separators 101 , the separators 101 are arranged between two adjacent rows of battery cells 20 , and N is an integer greater than 1. As shown in FIG. 9 , it is described by taking N as 2 as an example.
  • a plurality of battery modules 100 are arranged along the second direction Y, and there are gaps between adjacent battery modules 100 .
  • the end of the partition 101 in the first direction X is provided with a fixing structure 103 , and the fixing structure 103 is connected to the fixing member 104 at the end of the partition 101 in the first direction X to fix the partition 101 .
  • the separator 101 is bonded to the first wall 201 .
  • the separator 101 is fixedly connected to the first wall 201 by bonding, which has a simple structure and is convenient for processing and assembly.
  • separator 101 and the first wall 201 may also be connected in other ways, for example, riveting, welding, etc., which is not limited in this application.
  • An embodiment of the present application also provides an electric device, which may include the battery 10 in the foregoing embodiments.
  • the electrical device may be a vehicle 1, a ship, or a spacecraft, etc., but this is not limited in this embodiment of the present application.
  • the battery 10 and the electrical device of the embodiment of the present application are described above, and the method and device for preparing the battery 10 of the embodiment of the present application will be described below, and the parts not described in detail can be referred to the foregoing embodiments.
  • FIG. 10 shows a schematic flowchart of a method 300 for manufacturing a battery 10 according to an embodiment of the present application. As shown in Figure 10, the method 300 may include:
  • the separator 101 extends along the first direction X and is connected to the first wall 201 of each battery cell 20 in the plurality of battery cells 20, and the first wall 201 is the battery cell 20
  • the wall with the largest surface area, the surface of the partition 101 is provided with an insulating layer 102 , wherein the dimension T1 of the partition 101 in the second direction Y perpendicular to the first wall 201 is less than 0.5 mm.
  • FIG. 11 shows a schematic block diagram of an apparatus 400 for preparing a battery 10 according to an embodiment of the present application.
  • the device 400 for preparing a battery 10 may include: a providing module 410 .
  • a module 410 is provided for providing a plurality of battery cells 20 arranged along a first direction X and a separator 101 extending along the first direction X and connected to each battery cell 20 in the plurality of battery cells 20
  • the first wall 201 is connected to the first wall 201, which is the wall with the largest surface area in the battery cell 20, and the surface of the separator 101 is provided with an insulating layer 102, wherein the dimension T1 of the separator 101 in the second direction Y is less than 0.5 mm, the second direction Y is perpendicular to the first wall 201 .
  • T1 is the size of the separator in the second direction Y
  • H1 is the size of the separator in the third direction Z
  • L1 is the size of the separator in the first direction X
  • H2 is the size of a single battery cell in the third direction
  • the dimension on Z, L2 is the sum of the dimensions of the plurality of battery cells in the first direction X
  • S1 H1*L1
  • S2 H2*L2.

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Abstract

本申请实施例提供一种电池、用电设备、制备电池的方法和设备。该电池包括：沿第一方向排列的多个电池单体；隔板，该隔板沿第一方向延伸且与多个电池单体中的每个电池单体的第一壁连接，该第一壁为电池单体中表面积最大的壁，隔板的表面设置有绝缘层，隔板在第二方向上的尺寸小于0.5mm，该第二方向垂直于第一壁。本申请实施例的技术方案，能够提升电池的性能。

Description

电池、用电设备、制备电池的方法和设备 技术领域
本申请涉及电池技术领域，特别是涉及一种电池、用电设备、制备电池的方法和设备。
背景技术
随着环境污染的日益加剧，新能源产业越来越受到人们的关注。在新能源产业中，电池技术是关乎其发展的一项重要因素。
电池内部的空间利用率，影响电池的电量和能量密度，进而影响电池的性能。如何提升电池的性能，是电池技术中一个亟待解决的技术问题。
发明内容
本申请提供了一种电池、用电设备、制备电池的方法和设备，能够提升电池的能量密度同时保障电池中的电绝缘，从而能够提升电池的性能。
第一方面，提供了一种电池，包括：沿第一方向排列的多个电池单体；隔板，所述隔板沿所述第一方向延伸且与所述多个电池单体中的每个电池单体的第一壁连接，所述第一壁为所述电池单体中表面积最大的壁，所述隔板的表面设置有绝缘层，其中，所述隔板在第二方向上的尺寸T1小于0.5mm，所述第二方向垂直于所述第一壁。
在本申请实施例中，在电池中设置隔板与一列沿第一方向排列的多个电池单体中的每个电池单体的表面积最大的第一壁连接，隔板在垂直于第一壁的第二方向上的尺寸设置为小于0.5mm。通过隔板将多个电池单体连接成整体，这种情况下，电池内可以不再设置侧板，也可以不需要再设置梁等结构，可以较大限度地提升电池内部的空间利用率；从而提升电池的能量密度；通过在隔板的表面设置绝缘层，避免隔板与电池单体的电连接。因此，本申请实施例的技术方案能够在提升电池的能量密度 的同时保障电池中的电绝缘，从而能够提升电池的性能。
在一种可能的实现方式中，所述隔板在所述第二方向上的尺寸T1不小于0.05mm。这样可以避免因隔板在第二方向上的尺寸过小而无法满足电池的强度需求。
在一种可能的实现方式中，所述隔板的与所述多个电池单体的所述第一壁连接的表面的面积S1与所述多个电池单体的与所述隔板的同一侧连接的所述第一壁的总面积S2满足：0.25≤S1/S2≤4。
当S1/S2的值过小，即隔板的与多个电池单体的第一壁连接的表面的面积S1远小于多个电池单体的与隔板的同一侧连接的第一壁的总面积S2时，第一壁与隔板的接触面积过小，无法满足电池的强度需求；当S1/S2的值过大，即隔板的与第一壁连接的表面的面积S1远大于多个电池单体的与隔板的同一侧连接的第一壁的总面积S2时，相较于电池单体，隔板占用电池内部的空间过多，不利于提高电池的能量密度；因此设置S1/S2的值为0.25～4，这样既可以提高电池的能量密度，又可以提升电池的强度。
在一种可能的实现方式中，在第三方向上，所述隔板的尺寸H1与所述电池单体的所述第一壁的尺寸H2满足：0.2≤H1/H2≤2，所述第三方向垂直于所述第一方向和所述第二方向。
当H1/H2过小，即在第三方向上，隔板的尺寸H1远小于电池单体的第一壁的尺寸H2时，第一壁与隔板的接触面积过小，无法满足电池的强度需求；当H1/H2过大，即在第三方向上，隔板的尺寸H1远大于电池单体的第一壁的尺寸H2时，相较于电池单体，隔板占用电池内部的空间过多，不利于提高电池的能量密度，因此设置H1/H2的值为0.2～2，这样既可以提高电池的能量密度，又可以提升电池的强度。
在一种可能的实现方式中，在所述第一方向上，所述隔板的尺寸L1与所述多个电池单体的尺寸L2满足：0.5≤L1/L2≤2。
当L1/L2过小，即在第一方向上，隔板的尺寸L1远小于电池单体的第一壁的尺寸H2时，第一壁与隔板的接触面积过小，无法满足电池的强度需求；当H1/H2过大，即在第一方向上，隔板的尺寸H1远大于电池单体的第一壁的尺寸H2时，相较于电池单体，隔板占用电池内部的空间过多，不利于提高电池的能量密度，因此设置H1/H2的值为0.5～2，这样既可以提高电池的能量密度，又可以提升电池的强度。
在一种可能的实现方式中，所述绝缘层在所述第二方向上的尺寸T2满足：0.01mm≤T2≤0.3mm。
当绝缘层在第二方向上的尺寸T2过小时，绝缘层无法有效避免电池单体和隔板的电连接，电池会出现绝缘不良的情况，当绝缘层在第二方向上的尺寸T2过大时，会过多占用电池内部的空间，不利于提高电池的能量密度，因此设置T2的值为0.01～0.3mm，这样既可以提高电池的能量密度，又可以保证电池的安全性。
在一种可能的实现方式中，所述电池的电压U与所述绝缘层在所述第二方向上的尺寸T2满足：0.01×10 -3mm/V≤T2/U≤3×10 -3mm/V。
当T2/U过小，即单位电压的绝缘层在第二方向上的尺寸T2过小时，绝缘层无法有效避免电池单体和隔板的电连接，电池会出现绝缘不良的情况，存在安全隐患，当T2/U过大，即单位电压的绝缘层在第二方向上的尺寸T2过大时，会过多占用电池内部的空间，不利于提高电池的能量密度，因此设置T2/U的值为0.01×10 -3～3×10 -3mm/V，这样既可以提高电池的能量密度，又可以保证电池的安全性。
在一种可能的实现方式中，所述电池单体包括在所述第二方向上相对设置的两个所述第一壁和在所述第一方向上相对设置的两个第二壁，其中，在所述第一方向上，相邻的两个所述电池单体的所述第二壁相对。
在一种可能的实现方式中，所述电池包括多列沿所述第一方向排列的多个所述电池单体和多个所述隔板，其中，多列所述电池单体和多个所述隔板在所述第二方向上交替设置。
这样，每列沿第一方向X排列的多个电池单体的第一壁都可以与隔板连接，每列沿第一方向X排列的多个电池单体都可以通过隔板连接成整体，从而有效提升电池的强度。
在一种可能的实现方式中，所述电池包括多个电池模块，所述电池模块包括至少一列沿所述第一方向排列的多个所述电池单体和至少一个所述隔板，且至少一列所述电池单体和至少一个所述隔板在所述第二方向上交替设置。这样，多列电池单体和多个隔板相互连接形成一个整体，容纳于箱体内，既能够对每一列电池单体进行有效的固定，又能够保证电池整体的能量密度，从而能够提升电池的性能。
在一种可能的实现方式中，所述电池模块包括N列所述电池单体和N-1个所述隔板，所述隔板设置于相邻的两列所述电池单体之间，N为大于1的整数。这样，在电池内可以设置较少的隔板，但同时能够保证每个电池单体均能够连接到隔板上。
在一种可能的实现方式中，多个所述电池模块沿所述第二方向排列，相邻的所述电池模块间具有间隙。该间隙可以给电池单体提供膨胀空间。
在一种可能的实现方式中，所述隔板与所述第一壁粘接。
通过粘接的方式将隔板与第一壁固定连接，结构简单，便于加工和组装。
第二方面，提供了一种用电设备，包括：上述第一方面或第一方面的任意可能的实现方式中的电池，所述电池用于提供电能。
第三方面，提供了一种制备电池的方法，包括：提供沿第一方向排列的多个电池单体；提供隔板，所述隔板沿所述第一方向延伸且与所述多个电池单体中的每个电池单体的第一壁连接，所述第一壁为所述电池单体中表面积最大的壁，所述隔板的表面设置有绝缘层，其中，所述隔板在第二方向上的尺寸T1小于0.5mm，所述第二方向垂直于所述第一壁。
第四方面，提供了一种制备电池的设备，包括执行上述第三方面的方法的模块。
在本申请实施例中，在电池中设置隔板与一列沿第一方向排列的多个电池单体中的每个电池单体的表面积最大的第一壁连接，隔板在垂直于第一壁的第二方向上的尺寸设置为小于0.5mm。通过隔板将多个电池单体连接成整体，这种情况下，电池内可以不再设置侧板，也可以不需要再设置梁等结构，可以较大限度地提升电池内部的空间利用率；从而提升电池的能量密度；通过在隔板的表面设置绝缘层，避免隔板与电池单体的电连接。因此，本申请实施例的技术方案能够在提升电池的能量密度的同时保障电池中的电绝缘，从而能够提升电池的性能。
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是本申请一实施例公开的一种车辆的结构示意图；
图2是本申请一实施例公开的一种电池的分解结构示意图；
图3是本申请一实施例公开的一种电池单体的分解结构示意图；
图4是本申请一实施例公开的一种电池的部分结构示意图；
图5是本申请一实施例公开的一种电池的部分结构示意图；
图6是本申请一实施例公开的一种电池单体的示意图；
图7是本申请一实施例公开的一种电池的部分结构示意图；
图8是本申请一实施例公开的一种电池模块的结构示意图；
图9是本申请一实施例公开的一种电池的结构示意图；
图10是本申请一实施例的制备电池的方法的示意性流程图；
图11是本申请一实施例的制备电池的设备的示意性框图。
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，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；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；“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。
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。
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，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
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：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
本申请中，电池单体可以包括锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。电池单体一般按封装的方式分成三种：柱形电池单体、方体方形电池单体和软包电池单体，本申请实施例对此也不限定。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池包等。电池一般包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
电池单体包括电极组件和电解液，电极组件由正极片、负极片和隔离膜组成。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。隔离膜的材质可以为聚丙烯(PP)或聚乙烯(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。
为了满足不同的电力需求，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。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。电池再进一步设置于用电设备中，为用电设备提供电能。
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、安全性等。其中，在电池内部空间一定的情况下，提升电池内部空间的利用率，是提升电池能量密度的有效手段。然而，在提升电池内部空间的利用率的同时，有可能会降低电池的结构强度。例如，在电池的箱体内部通常会设置用于挂载电池模块的梁，另外，电池中的电池模块也会设置侧板和端板。上述梁、侧板和端板在实现电池的固定的同时，也占用了电池的内部空间。但是，若不设置梁、侧板和端板，则会导致电池的结构强度不足，影响电池的性能。
鉴于此，本申请实施例提供了一种技术方案，在本申请实施例中，在电池中设置隔板与一列沿第一方向排列的多个电池单体中的每个电池单体的表面积最大的第一壁连接，隔板在垂直于第一壁的第二方向上的尺寸设置为小于0.5mm。通过隔板将多个电池单体连接成整体，这种情况下，电池内可以不再设置侧板，也可以不需要再设置梁等结构，可以较大限度地提升电池内部的空间利用率；从而提升电池的能量密度；通过在隔板的表面设置绝缘层，避免隔板与电池单体的电连接。因此，本申请实施例的技术方案能够在提升电池的能量密度的同时保障电池中的电绝缘，从而能够提升电池的性能。
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，例如，航天器包括飞机、火箭、航天飞机和宇宙飞船等。
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设备，还可以适用于所有使用电池的设备，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，为本申请一个实施例的一种车辆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40，控制器30以及电池10，控制器30用来控制电池10为马达40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10可以包括多个电池单体。例如，如图2所示，为本申请一个实施例的一种电池10的结构示意图，电池10可以包括多个电池单体20。电池10还可以包括箱体11，箱体11内部为中空结构，多个电池单体20容纳于箱体11内。例如，多个电池单体20相互并联或串联或混联组合后置于箱体11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。由于每个电池10中包括的电池单体20的数量可能较多，为了便于安装，可以将电池单体20分组设置，每组电池单体20组成电池模块。电池模块中包括的电池单体20的数量不限，可以根据需求设置。电池可以包括多个电池模块，这些电池模块可通过串联、并联或混联的方式进行连接。
如图3所示，为本申请一个实施例的一种电池单体20的结构示意图，电池单体20包括一个或多个电极组件22、壳体211和盖板212。壳体211和盖板212形成外壳或电池盒21。壳体211的壁以及盖板212均称为电池单体20的壁，其中对于长方体型电池单体20，壳体211的壁包括底壁和四个侧壁。壳体211根据一个或多个电极组件22组合后的形状而定，例如，壳体211可以为中空的长方体或正方体或圆柱体，且壳体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。例如，当壳体211为中空的长方体或正方体时，壳体211的其中一个平面为开口面，即该平面不具有壁体而使得壳体211内外相通。当壳体211可以为中空的圆柱体时，壳体211的端面为开口面，即该端面不具有壁体而使得壳体211内外相通。盖板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可以设置在盖板212上。盖板212通常是平板形状，两个电极端子214固定在盖板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，其位于盖板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与正极极耳连接，负电极端子214b通过另一个连接构件23与负极极耳连接。
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。
电池单体20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。
泄压机构213可以为各种可能的泄压结构，本申请实施例对此并不限定。例如，泄压机构213可以为温敏泄压机构，温敏泄压机构被配置为在设有泄压机构213的电池单体20的内部温度达到阈值时能够熔化；和/或，泄压机构213可以为压敏泄压机 构，压敏泄压机构被配置为在设有泄压机构213的电池单体20的内部气压达到阈值时能够破裂。
图4示出了本申请一个实施例的电池10的结构示意图。如图4中的(a)所示，电池10包括沿第一方向X排列的多个电池单体20和隔板101，隔板101沿第一方向X延伸且与多个电池单体20中的每个电池单体20的第一壁201连接，该第一壁201为电池单体20中表面积最大的壁。
这样，将多个电池单体20中的每个电池单体20的表面积最大的第一壁201都与隔板101连接，通过隔板101将多个电池单体20连接成整体，这种情况下，电池10内可以不再设置侧板，也可以不需要再设置梁等结构，可以较大限度地提升电池10内部的空间利用率，提高电池10的能量密度。
在本申请实施例中，如图4的(b)所示，隔板101在第二方向Y上的尺寸T1小于0.5mm，该第二方向Y垂直于所述第一壁201。
这样可以避免隔板101在第二方向Y上的尺寸过大而占用过多电池10内部的空间，进一步提升电池10内部的空间利用率，从而提升电池10的能量密度。
在本申请实施例中，如图4的(c)所示，隔板101的表面设置有绝缘层102，避免隔板101与电池单体20的电连接，提高电池10的安全性。可选地，绝缘层102可以为粘接在隔板101表面的绝缘膜或者涂覆在隔板101表面的绝缘漆。
在本申请实施例中，绝缘层102在第二方向Y上的尺寸T2满足：0.01mm≤T2≤0.3mm。
当绝缘层102在第二方向Y上的尺寸T2过小时，绝缘层102无法有效避免电池单体20和隔板101的电连接，电池10会出现绝缘不良的情况，存在安全隐患，当绝缘层102在第二方向Y上的尺寸T2过大时，会过多占用电池10内部的空间，不利于提高电池10的能量密度，因此设置T2的值为0.01～0.3mm，这样既可以提高电池10的能量密度，又可以保证电池10的安全性。
在本申请实施例中，电池10的电压U与绝缘层102在第二方向Y上的尺寸T2满足：0.01×10 -3mm/V≤T2/U≤3×10 -3mm/V。
绝缘层102的绝缘效果不仅与绝缘层102的厚度有关，还与单位电压对应的绝缘层102厚度有关，当T2/U过小，即单位电压的绝缘层102在第二方向Y上的尺寸T2过小时，绝缘层102无法有效避免电池单体20和隔板101的电连接，电池10会出 现绝缘不良的情况，存在安全隐患，当T2/U过大，即单位电压的绝缘层102在第二方向Y上的尺寸T2过大时，会过多占用电池10内部的空间，不利于提高电池10的能量密度，因此设置T2/U的值为0.01×10 -3～3×10 -3mm/V，这样既可以提高电池10的能量密度，又可以保证电池10的安全性。
在本申请实施例中，隔板101在第二方向Y上的尺寸T1不小于0.05mm。这样可以避免因隔板101在第二方向上的尺寸过小，即隔板101的厚度较小，隔板101的刚度较小而无法满足电池10的强度需求。
在本申请实施例中，所述隔板101的与所述多个电池单体20的所述第一壁201连接的表面的面积S1与所述多个电池单体20的与所述隔板101的同一侧连接的所述第一壁201的总面积S2满足：0.25≤S1/S2≤4，其中，S1＝H1*L1，S2＝H2*L2。如图5所示，H1为隔板101在第三方向Z上的尺寸，L1为隔板101在第一方向X上的尺寸，H2为单个电池单体20在第三方向Z上的尺寸，L2为多个电池单体20在第一方向X上的尺寸的总和。
当S1/S2的值过小，即隔板101的与多个电池单体20的第一壁201连接的表面的面积S1远小于多个电池单体20的与隔板101的同一侧连接的第一壁201的总面积S2时，第一壁201与隔板101的接触面积过小，无法满足电池10的强度需求；当S1/S2的值过大，即隔板101的与第一壁201连接的表面的面积S1远大于多个电池单体20的与隔板101的同一侧连接的第一壁201的总面积S2时，相较于电池单体20，隔板101占用电池10内部的空间过多，不利于提高电池10的能量密度；因此设置S1/S2的值为0.25～4，这样既可以提高电池10的能量密度，又可以提升电池10的强度。
在本申请实施例中，如图5所示，在第三方向Z上，隔板101的尺寸H1与电池单体20的第一壁201的尺寸H2满足：0.2≤H1/H2≤2，该第三方向Z垂直于第一方向X和第二方向Y。
当H1/H2过小，即在第三方向Z上，隔板101的尺寸H1远小于电池单体20的第一壁201的尺寸H2时，第一壁201与隔板101的接触面积过小，无法满足电池10的强度需求；当H1/H2过大，即在第三方向Z上，隔板101的尺寸H1远大于电池单体20的第一壁201的尺寸H2时，相较于电池单体20，隔板101占用电池10内部的空间过多，不利于提高电池10的能量密度，因此设置H1/H2的值为0.2～2，这样既可以提高电池10的能量密度，又可以提升电池10的强度。
在本申请实施例中，如图5所示，在第一方向X上，隔板101的尺寸L1与多个电池单体20的尺寸L2满足：0.5≤L1/L2≤2。
当L1/L2过小，即在第一方向X上，隔板101的尺寸L1远小于电池单体20的第一壁201的尺寸H2时，第一壁201与隔板101的接触面积过小，无法满足电池10的强度需求；当H1/H2过大，即在第一方向X上，隔板101的尺寸H1远大于电池单体20的第一壁201的尺寸H2时，相较于电池单体20，隔板101占用电池10内部的空间过多，不利于提高电池10的能量密度，因此设置H1/H2的值为0.5～2，这样既可以提高电池10的能量密度，又可以提升电池10的强度。
在本申请实施例中，如图6所示，电池单体20包括在第二方向Y上相对设置的两个第一壁201和在第一方向X上相对设置的两个第二壁202，其中，在第一方向X上，相邻的两个电池单体20的第二壁202相对。
在本申请实施例中，如图7所示，电池10包括多列沿第一方向X排列的多个电池单体20和多个隔板101，其中，多列电池单体20和多个隔板101在第二方向Y上交替设置。
这样，每列沿第一方向X排列的多个电池单体20的第一壁201都可以与隔板101连接，每列沿第一方向X排列的多个电池单体20都可以通过隔板101连接成整体，从而有效提升电池10的强度。
在本申请实施例中，电池10包括多个电池模块100，如图8所示，该电池模块100包括至少一列沿第一方向X排列的多个电池单体20和至少一个隔板101，且至少一列电池单体20和至少一个隔板101在第二方向Y上交替设置。
在本申请实施例中，电池模块100包括N列电池单体20和N-1个隔板101，隔板101设置于相邻的两列电池单体20之间，N为大于1的整数。如图9所示，以N为2为示例说明。
在本申请实施例中，如图9所示，多个电池模块100沿第二方向Y排列，相邻的电池模块100间具有间隙。
可选地，隔板101在第一方向X上的端部设置有固定结构103，该固定结构103与隔板101在第一方向X上的端部的固定件104连接，固定隔板101。
在本申请实施例中，隔板101与第一壁201粘接。通过粘接的方式将隔板 101与第一壁201固定连接，结构简单，便于加工和组装。
应理解，隔板101与第一壁201还可以通过其他方式连接，例如，铆接、焊接等，本申请对此不做限定。
本申请一个实施例还提供了一种用电设备，该用电设备可以包括前述实施例中的电池10。可选地，该用电设备可以为车辆1、船舶或航天器等，但本申请实施例对此并不限定。
上文描述了本申请实施例的电池10和用电设备，下面将描述本申请实施例的制备电池10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10示出了本申请一个实施例的制备电池10的方法300的示意性流程图。如图10所示，该方法300可以包括：
310，提供沿第一方向X排列的多个电池单体20；
320，提供隔板101，该隔板101沿第一方向X延伸且与多个电池单体20中的每个电池单体20的第一壁201连接，该第一壁201为电池单体20中表面积最大的壁，隔板101的表面设置有绝缘层102，其中，隔板101在第二方向Y上的尺寸T1小于0.5mm，该第二方向Y垂直于第一壁201。
图11示出了本申请一个实施例的制备电池10的设备400的示意性框图。如图11所示，制备电池10的设备400可以包括：提供模块410。
提供模块410，用于提供沿第一方向X排列的多个电池单体20和隔板101，隔板101沿第一方向X延伸且与多个电池单体20中的每个电池单体20的第一壁201连接，该第一壁201为电池单体20中表面积最大的壁，隔板101的表面设置有绝缘层102，其中，隔板101在第二方向Y上的尺寸T1小于0.5mm，该第二方向Y垂直于第一壁201。
以下，说明本申请的实施例。下面描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。实施例中未注明具体技术或条件的，按照本领域内的文献所描述的技术或条件或者按照产品说明书进行。
采用附图中示出的电池单体20和隔板101，在GB 38031-2020《电动汽车用动力蓄电池安全要求》标准下进行隔板抗振动冲击测试，测试结果如表1所示。表1中 T1为隔板在第二方向Y上的尺寸，H1为隔板在第三方向Z上尺寸，L1为隔板在第一方向X上尺寸，H2为单个电池单体在第三方向Z上的尺寸，L2为多个电池单体在第一方向X上的尺寸的总和，S1＝H1*L1，S2＝H2*L2。
表1
Figure PCTCN2022077152-appb-000001
Figure PCTCN2022077152-appb-000002
采用附图中示出的电池单体20和隔板101，参考IEC 60664-1，在绝缘测试施加1000VDC，绝缘阻值≥500MΩ；耐压测试施加2700VDC并持续60S，漏电流≤1mA条件下对隔板的绝缘耐压能力进行测试，测试结果如表2所示。表2中T2为绝缘层在第二方向Y上的尺寸，U为电池电压。
表2
Figure PCTCN2022077152-appb-000003
Figure PCTCN2022077152-appb-000004
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 (16)

  1. 一种电池(10)，其特征在于，包括：
    沿第一方向排列的多个电池单体(20)；
    隔板(101)，所述隔板(101)沿所述第一方向延伸且与所述多个电池单体(20)中的每个电池单体(20)的第一壁(201)连接，所述第一壁(201)为所述电池单体(20)中表面积最大的壁，所述隔板(101)的表面设置有绝缘层(102)；
    其中，所述隔板(101)在第二方向上的尺寸T1小于0.5mm，所述第二方向垂直于所述第一壁(201)。
  2. 根据权利要求1所述的电池(10)，其特征在于，所述隔板(101)在所述第二方向上的尺寸T1不小于0.05mm。
  3. 根据权利要求1或2所述的电池(10)，其特征在于，所述隔板(101)的与所述多个电池单体(20)的所述第一壁(201)连接的表面的面积S1与所述多个电池单体(20)的与所述隔板(101)的同一侧连接的所述第一壁(201)的总面积S2满足：0.25≤S1/S2≤4。
  4. 根据权利要求1至3中任一项所述的电池(10)，其特征在于，在第三方向上，所述隔板(101)的尺寸H1与所述电池单体(20)的所述第一壁(201)的尺寸H2满足：0.2≤H1/H2≤2，所述第三方向垂直于所述第一方向和所述第二方向。
  5. 根据权利要1至4中任一项所述的电池(10)，其特征在于，在所述第一方向上，所述隔板(101)的尺寸L1与所述多个电池单体(20)的尺寸L2满足：0.5≤L1/L2≤2。
  6. 根据权利要求1至5中任一项所述的电池(10)，其特征在于，所述绝缘层(102)在所述第二方向上的尺寸T2满足：0.01mm≤T2≤0.3mm。
  7. 根据权利要求1至6中任一项所述的电池(10)，其特征在于，所述电池(10)的电压U与所述绝缘层(102)在所述第二方向上的尺寸T2满足：0.01×10 -3mm/V≤T2/U≤3×10 -3mm/V。
  8. 根据权利要求1至7中任一项所述的电池(10)，其特征在于，所述电池单体(20)包括在所述第二方向上相对设置的两个所述第一壁(201)和在所述第一方向上 相对设置的两个第二壁(202)，其中，在所述第一方向上，相邻的两个所述电池单体(20)的所述第二壁(202)相对。
  9. 根据权利要求1至8中任一项所述的电池(10)，其特征在于，所述电池(10)包括多列沿所述第一方向排列的多个所述电池单体(20)和多个所述隔板(101)，其中，多列所述电池单体(20)和多个所述隔板(101)在所述第二方向上交替设置。
  10. 根据权利要求1至8中任一项所述的电池(10)，其特征在于，所述电池(10)包括多个电池模块(100)，所述电池模块(100)包括至少一列沿所述第一方向排列的多个所述电池单体(20)和至少一个所述隔板(101)，且至少一列所述电池单体(20)和至少一个所述隔板(101)在所述第二方向上交替设置。
  11. 根据权利要求10所述的电池(10)，其特征在于，所述电池模块(100)包括N列所述电池单体(20)和N-1个所述隔板(101)，所述隔板(101)设置于相邻的两列所述电池单体(20)之间，N为大于1的整数。
  12. 根据权利要求10或11所述的电池(10)，其特征在于，多个所述电池模块(100)沿所述第二方向排列，相邻的所述电池模块(100)间具有间隙。
  13. 根据权利要求1至12中任一项所述的电池(10)，其特征在于，所述隔板(101)与所述第一壁(201)粘接。
  14. 一种用电设备，其特征在于，包括：根据权利要求1至13中任一项所述的电池(10)，所述电池(10)用于提供电能。
  15. 一种制备电池(10)的方法，其特征在于，包括：
    提供沿第一方向排列的多个电池单体(20)；
    提供隔板(101)，所述隔板(101)沿所述第一方向延伸且与所述多个电池单体(20)中的每个电池单体(20)的第一壁(201)连接，所述第一壁(201)为所述电池单体(20)中表面积最大的壁，所述隔板(101)的表面设置有绝缘层(102)；
    其中，所述隔板(101)在第二方向上的尺寸T1小于0.5mm，所述第二方向垂直于所述第一壁(201)。
  16. 一种制备电池(10)的设备，其特征在于，包括：
    提供模块，用于提供沿第一方向排列的多个电池单体(20)和隔板(101)，所述隔板(101)沿所述第一方向延伸且与所述多个电池单体(20)中的每个电池单体(20) 的第一壁(201)连接，所述第一壁(201)为所述电池单体(20)中表面积最大的壁，所述隔板(101)的表面设置有绝缘层(102)；
    其中，所述隔板(101)在第二方向上的尺寸T1小于0.5mm，所述第二方向垂直于所述第一壁(201)。
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CN111009629A (zh) * 2019-11-18 2020-04-14 比亚迪股份有限公司 一种电池包和电动车

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