WO2024007419A1 - 一种隔离组件、电池模组、电池和用电装置 - Google Patents

一种隔离组件、电池模组、电池和用电装置 Download PDF

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Publication number
WO2024007419A1
WO2024007419A1 PCT/CN2022/111491 CN2022111491W WO2024007419A1 WO 2024007419 A1 WO2024007419 A1 WO 2024007419A1 CN 2022111491 W CN2022111491 W CN 2022111491W WO 2024007419 A1 WO2024007419 A1 WO 2024007419A1
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WIPO (PCT)
Prior art keywords
isolation
battery
battery cells
elastic member
elastic members
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PCT/CN2022/111491
Other languages
English (en)
French (fr)
Inventor
李志强
曾超
包聪
汪宇超
Original Assignee
宁德时代新能源科技股份有限公司
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Priority to CN202280063071.9A priority Critical patent/CN118056316A/zh
Publication of WO2024007419A1 publication Critical patent/WO2024007419A1/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
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange 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
    • H01M10/6561—Gases
    • 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
    • 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, specifically, to an isolation component, a battery module, a battery and an electrical device.
  • Lithium-ion battery energy storage is currently the main method of electrical energy storage and is widely used in electricity, electric vehicles and other related equipment. Judging from lithium-ion battery fire and explosion accidents, it often starts with a single battery failure and thermal runaway in the module. The heat generated by the battery's thermal runaway is then transferred to adjacent batteries, causing a chain reaction and causing the entire battery system to burn down.
  • the present application provides an isolation component, a battery module, a battery and an electrical device, which can prevent or inhibit heat transfer between battery cells.
  • the present application provides an isolation component for being disposed between battery cells, including: an isolation member and an elastic member.
  • the isolation member has two abutting surfaces facing each other along the thickness direction.
  • the elastic component is protruding from at least one contact surface of the isolation component.
  • the isolation component can be used to be disposed between the battery cells to prevent or inhibit the heat transfer between the battery cells and limit the thermal runaway battery and its impact to the minimum range; at the same time,
  • the contact surface of the isolator is provided with an elastic member.
  • the elastic member can absorb the tolerance in the length direction of the battery module, so that the preload force of the battery module is in an appropriate state, which can not only ensure that the battery module passes the strength test, but also reduce the battery life. Single body diving risk.
  • At least two elastic members are provided on at least one abutting surface of the isolation member.
  • the contact surface of the separator is used to contact the large surface of the battery cell.
  • the contact surface has at least two support points, which is beneficial to the battery cell. Stable contact with the contact surface of the isolation component.
  • the elastic members are in strip shape, and a through-passage is formed between at least two elastic members to allow airflow to pass through. After the ends of at least two elastic members are in contact with the large surface of the battery cell, a penetrating channel for airflow to pass is formed between the large surface of the battery cell, the contact surface and the two elastic members, which is beneficial to the battery cell. of heat dissipation.
  • At least two elastic members are parallel to each other.
  • the size of the air inlet and the air outlet of the channel formed by the mutually parallel elastic members are the same, which is beneficial to the circulation of air flow.
  • the isolation member is a rectangular isolation plate, and the length direction of the elastic member is parallel to the sides of the isolation plate.
  • the sides of the rectangular separator plate are generally aligned with the sides of the battery cells.
  • the isolation component includes two strip-shaped elastic members, and the two elastic members are respectively located at both ends of the isolation plate.
  • the two strip-shaped elastic members can stably contact the two ends of the large surface of the battery cell in the height direction or the length direction, and a penetrating channel is formed between the two elastic members to allow airflow to pass, which is beneficial to the battery cell. Body heat dissipation.
  • the isolation assembly further includes a cooling flexible bag containing a cooling medium, and the cooling flexible bag is disposed on at least one abutment surface of the isolation member.
  • the cooling medium in the cooling flexible bag can absorb the heat released by the battery cells, thereby improving the cooling effect of the battery cells.
  • the cooling flexible bag is disposed in the middle of the abutment surface of the isolator. After the isolation component is arranged between the battery cells, the cooling flexible bag can contact or be close to the large surface of the battery cells, thereby improving the cooling effect of the battery cells.
  • the spacer has a hollow structure penetrating along the thickness direction.
  • the hollow structure facilitates air circulation, thereby improving the heat dissipation effect of the battery cells.
  • the height of the elastic member in the thickness direction of the isolation member before compression is 1.5-2.5 mm
  • the height of the elastic member in the thickness direction of the isolation member after compression is 0.9-2.4 mm.
  • the elastic parts have good elasticity, which can not only absorb the tolerance in the length direction of the battery module, but also keep the preload force of the battery module in an appropriate state. It can not only ensure that the battery module passes the strength test, but also reduce the stress of the battery cells. Diving risk. And because the compressed size of the elastic part is small, it does not take up too much space, thus ensuring that the battery has a high energy density.
  • the present application provides a battery module, which includes a plurality of battery cells and a plurality of isolating components in the above embodiments, and the isolating components are disposed between two adjacent battery cells.
  • the isolation component is arranged between the battery cells to prevent or inhibit the heat transfer between the battery cells and limit the thermal runaway battery and its impact to the minimum range; at the same time, during isolation
  • the abutting surface of the component is provided with an elastic component.
  • the elastic component can absorb the tolerance in the length direction of the battery module, so that the preload force of the battery module is in an appropriate state, which can not only ensure that the battery module passes the strength test, but also reduce the battery unit body diving risk.
  • the battery cell has curved first transition regions at both ends along its length direction, and the elastic member does not abut the first transition region.
  • the strength of the first transition zone is low.
  • the force exerted by the elastic member on the battery cell is the reaction force of the assembly force or expansion force exerted by the battery cell on the elastic member, which can reach up to 20000N.
  • the elastic member does not contact the first transition zone. area, so as to avoid a large deformation of the first transition area caused by a higher reaction force squeezing the first transition area.
  • the battery cell has a welding zone and a curved second transition zone at both ends along its height direction, and the elastic member does not abut against the second transition zone and the welding zone.
  • the strength of the second transition zone and the welding zone is low.
  • the force exerted by the elastic member on the battery cell is the reaction force of the assembly force or expansion force exerted by the battery cell on the elastic member, which can reach up to 20000N.
  • the elastic member does not contact the The second transition zone and the welding zone are thereby prevented from being greatly deformed in the first transition zone after a higher reaction force squeezes the second transition zone and the welding zone.
  • the present application provides a battery, which includes the battery module in the above embodiment.
  • the present application provides an electric device, which includes the battery in the above embodiment, and the electric device is used to provide electric energy.
  • Figure 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application.
  • Figure 2 is a schematic diagram of the exploded structure of a battery according to some embodiments of the present application.
  • Figure 3 is a schematic diagram of the exploded structure of a battery cell according to some embodiments of the present application.
  • Figure 4 is a schematic structural diagram of an isolation component according to the first embodiment of the present application.
  • Figure 5 is a side view of the isolation assembly according to the first embodiment of the present application.
  • Figure 6 is a side view of the isolation assembly according to the second embodiment of the present application.
  • Figure 7 is a schematic structural diagram of an isolation component according to the third embodiment of the present application.
  • Figure 8 is a schematic structural diagram of an isolation component according to the fourth embodiment of the present application.
  • Figure 9 is a schematic structural diagram of an isolation component according to the fifth embodiment of the present application.
  • Figure 10 is a schematic structural diagram of a battery module according to some embodiments of the present application.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • multiple refers to more than two (including two).
  • multiple groups refers to two or more groups (including two groups), and “multiple pieces” refers to It is more than two pieces (including two pieces).
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in many fields such as military equipment and aerospace. . As the application fields of power batteries continue to expand, their market demand is also constantly expanding.
  • the lithium-ion battery system is sensitive to temperature, and excessive temperature can easily cause thermal runaway, leading to fire, combustion, and explosion. Therefore, ensuring that the temperature of the lithium-ion battery is within a reasonable range throughout its life cycle is an important measure to avoid fire and explosion. From the perspective of lithium-ion battery fire and explosion accidents, it often starts with the failure of a single battery in the module and the occurrence of thermal runaway. The heat generated by the thermal runaway of a single battery is then transferred to adjacent batteries, which in turn triggers a chain reaction and causes the entire battery system to burn down.
  • isolation components can be installed between the battery cells in the battery module.
  • the isolation components can prevent or inhibit the heat transfer between battery cells, and Thermal runaway batteries and their effects are kept to a minimum.
  • the inventor also found that when the thickness of the battery cells and isolation components is lower than the lower limit, the assembled battery module does not have enough pretensioning force in the length direction. In this case, the strength of the module is supported only by the end and side plates. If the main frequency of the module is too low, the risk of failure in the strength test is high; when the thickness of the battery cells and isolation components is above the upper limit, the pre-tightening force in the length direction of the battery module obtained by the equipment is too large, and the battery cells are at risk of diving, resulting in The battery capacity becomes smaller and the electrolyte has no time to flow.
  • the inventor in order to prevent or suppress the heat transfer between battery cells and keep the preload force of the battery module in an appropriate state, the inventor has designed an isolation component after in-depth research.
  • the isolation component can be used to be installed in Between battery cells, the heat transfer between battery cells is prevented or suppressed, and the thermal runaway battery and its impact are limited to a minimum range; at the same time, an elastic member is provided on the contact surface of the isolator, and the elastic member can absorb the battery mold.
  • the tolerance in the length direction of the pack ensures that the preload force of the battery module is in an appropriate state, which not only ensures that the battery module passes the strength test, but also reduces the risk of diving of the battery cell.
  • the battery mentioned in the embodiments of this application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • Batteries generally include a battery box for packaging one or more battery cells.
  • the battery box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
  • the battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells or magnesium ion battery cells, etc., embodiments of the present application There is no limit to this.
  • the battery cell may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes, and the embodiments of the present application are not limited to this. Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, prismatic battery cells and soft-pack battery cells.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly consists of a positive electrode plate, a negative electrode plate and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work.
  • 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 positive electrode current collector that is not coated with the positive electrode active material layer protrudes from the positive electrode collector that is coated with the positive electrode active material layer. Fluid, the positive electrode current collector without the positive electrode active material layer is used 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 cobalt oxide, 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 negative electrode current collector that is not coated with the negative electrode active material layer protrudes from the negative electrode collector that is coated with the negative electrode active material layer.
  • Fluid, the negative electrode current collector that is not coated with the negative electrode active material layer is used as the negative electrode tab.
  • the material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon.
  • the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.
  • the material of the isolation film can be polypropylene (PP) or polyethylene (Polyethylene, PE).
  • the electrode assembly may have a rolled structure or a laminated structure, and the embodiments of the present application are not limited thereto.
  • the battery cell also includes a current collecting member, which is used to electrically connect the tabs of the battery cell and the electrode terminals to transport electric energy from the electrode assembly to the electrode terminal, and through the electrode terminal to the outside of the battery cell; and more
  • the battery cells are electrically connected through bus components to realize series, parallel or mixed connection of multiple battery cells.
  • the battery also includes a sampling terminal and a battery management system.
  • the sampling terminal is connected to the bus component and is used to collect battery cell information, such as voltage or temperature, etc.
  • the sampling terminal transmits the collected battery cell information to the battery management system.
  • the battery management system detects that the battery cell information exceeds the normal range, it will limit the battery output power to achieve safety protection.
  • the electrical devices suitable for using batteries described in the embodiments of the present application can be in various forms, such as mobile phones, portable devices, laptops, battery cars, electric cars, ships, spacecrafts, electric toys and electric toys.
  • Tools, etc., for example, spacecraft include airplanes, rockets, space shuttles and spaceships, etc.
  • Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric aircraft toys, etc.
  • Power tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.
  • the battery cells and batteries described in the embodiments of the present application are not limited to the above-described electrical devices, but can also be applied to all electrical devices using battery cells and batteries. However, for the sake of simplicity of description, the following embodiments All are explained using electric vehicles as an example.
  • the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
  • the battery 100 is disposed inside the vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 .
  • the battery 100 may be used to power the vehicle 1000 , for example, the battery 100 may serve as an operating power source for the vehicle 1000 .
  • the vehicle 1000 may also include a controller 200 and a motor 300 .
  • the controller 200 is used to control the battery 100 to provide power to the motor 300 , for example, for starting, navigating and driving the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but can also be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
  • the battery 100 includes a case 10 and battery cells 20 , and the battery cells 20 are accommodated in the case 10 .
  • the box 10 is used to provide an accommodation space for the battery cells 20, and the box 10 can adopt a variety of structures.
  • the box 10 may include a first part 11 and a second part 12 , the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a space for accommodating the battery cells 20 of accommodation space.
  • the second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure.
  • the first part 11 covers the open side of the second part 12 so that the first part 11 and the second part 12 jointly define a receiving space.
  • the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 is covered with the open side of the second part 12.
  • the box 10 formed by the first part 11 and the second part 12 can be in various shapes, such as cylinder, rectangular parallelepiped, etc.
  • the battery 100 there may be a plurality of battery cells 20, and the plurality of battery cells 20 may be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the plurality of battery cells 20 are connected in series and in parallel.
  • the plurality of battery cells 20 can be directly connected in series or in parallel or mixed together, and then the whole composed of the plurality of battery cells 20 can be accommodated in the box 10 ; of course, the battery 100 can also be a plurality of battery cells 20 First, the battery modules are connected in series, parallel, or mixed to form a battery module, and then multiple battery modules are connected in series, parallel, or mixed to form a whole, and are accommodated in the box 10 .
  • the battery 100 may also include other structures.
  • the battery 100 may further include a bus component for realizing electrical connections between multiple battery cells 20 .
  • Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
  • the battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes.
  • FIG. 3 is a schematic diagram of an exploded structure of a battery cell provided by some embodiments of the present application.
  • the battery cell 20 refers to the smallest unit that constitutes the battery. As shown in FIG. 3 , the battery cell 20 includes an end cover 21 , a case 22 , an electrode assembly 23 and other functional components.
  • the end cap 21 refers to a component that covers the opening of the case 22 to isolate the internal environment of the battery cell 20 from the external environment.
  • the shape of the end cap 21 can be adapted to the shape of the housing 22 to fit the housing 22 .
  • the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 21 is less likely to deform when subjected to extrusion and collision, so that the battery cell 20 can have higher durability. Structural strength and safety performance can also be improved.
  • the end cap 21 may be provided with functional components such as electrode terminals. The electrode terminals may be used to electrically connect with the electrode assembly 23 for outputting or inputting electrical energy of the battery cell 20 .
  • the end cap 21 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold.
  • the end cap 21 can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • an insulating member may also be provided inside the end cover 21 , and the insulating member may be used to isolate the electrical connection components in the housing 22 from the end cover 21 to reduce the risk of short circuit.
  • the insulating member may be plastic, rubber, etc.
  • the housing 22 is a component used to cooperate with the end cover 21 to form an internal environment of the battery cell 20 , wherein the formed internal environment can be used to accommodate the electrode assembly 23 , electrolyte, and other components.
  • the housing 22 and the end cover 21 may be independent components, and an opening may be provided on the housing 22.
  • the end cover 21 covers the opening at the opening to form the internal environment of the battery cell 20.
  • the end cover 21 and the housing 22 can also be integrated.
  • the end cover 21 and the housing 22 can form a common connection surface before other components are put into the housing. When it is necessary to encapsulate the inside of the housing 22 At this time, the end cover 21 covers the housing 22 again.
  • the housing 22 can be of various shapes and sizes, such as rectangular parallelepiped, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23 .
  • the housing 22 may be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiments of the present application.
  • the electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur.
  • One or more electrode assemblies 23 may be contained within the housing 22 .
  • the electrode assembly 23 is mainly formed by winding or stacking positive electrode sheets and negative electrode sheets, and a separator is usually provided between the positive electrode sheets and the negative electrode sheets.
  • the portions of the positive electrode sheet and the negative electrode sheet that contain active material constitute the main body of the electrode assembly, and the portions of the positive electrode sheet and the negative electrode sheet that do not contain active material each constitute the tabs.
  • the positive electrode tab and the negative electrode tab can be located together at one end of the main body or respectively located at both ends of the main body. During the charging and discharging process of the battery, the positive active material and negative active material react with the electrolyte, and the tabs are connected to the electrode terminals to form a current loop.
  • Figure 4 is a schematic structural diagram of the isolation assembly according to the first embodiment of the present application.
  • Figure 5 is a side view of the isolation assembly according to the first embodiment of the present application.
  • Figure 6 is a side view of the isolation assembly according to the second embodiment of the present application.
  • This application provides an isolation component 30 for disposing between battery cells, including: an isolation member 400 and an elastic member 500.
  • the isolation member 400 has two abutment surfaces 401 opposite along the thickness direction.
  • the elastic member 500 is protruding from at least one contact surface 401 of the isolation member 400 .
  • the separator 400 is a component that is disposed between two battery cells or between a battery cell and an end plate to separate the two battery cells or separate the battery cell and the end plate, thereby preventing the two battery cells from being separated.
  • the body is directly in contact, or the battery cell is in direct contact with the end plate.
  • the spacer 400 may be a plate-shaped structure.
  • the contact surface 401 is a large surface for contacting the battery cell.
  • the elastic member 500 is a component made of a material with a small elastic modulus and protrudes from the isolation member 400 .
  • the elastic modulus of the elastic member 500 is smaller than the elastic modulus of the isolation member 400 . After receiving the assembly force of the battery module 40 or the expansion force of the battery cells, the elastic member 500 can undergo large deformation along the force-bearing direction.
  • the elastic member 500 is made of rubber material.
  • the isolation component 30 can be used to be disposed between the battery cells to prevent or inhibit heat transfer between the battery cells and limit the thermal runaway battery and its impact to a minimum; at the same time, on the contact surface 401 of the isolation member 400
  • the elastic member 500 is provided.
  • the elastic member 500 can absorb the tolerance in the length direction of the battery module 40 so that the pre-tightening force of the battery module 40 is in an appropriate state, which can not only ensure that the battery module 40 passes the strength test, but also reduce the battery unit. body diving risk.
  • the elastic member 500 is protruding from the two contact surfaces 401 of the isolation member 400 .
  • the isolator assembly 30 can be disposed between two battery cells or between a battery cell and an end plate.
  • the isolation component 30 uses the elastic member 500 to contact one adjacent battery cell, and uses one contact surface 401 to directly contact the other adjacent battery cell. Battery cells.
  • the elastic member 500 only protrudes from one contact surface 401 of the isolation member 400 .
  • the isolator assembly 30 can be disposed between two battery cells or between a battery cell and an end plate.
  • the isolation component 30 uses the elastic member 500 to contact one of the adjacent battery cells, and uses one contact surface 401 to directly contact the other adjacent battery cell. monomer.
  • Figure 7 is a schematic structural diagram of an isolation component according to a third embodiment of the present application. At least two elastic members 500 are provided on at least one contact surface 401 of the isolation member 400 .
  • Two elastic members 500 are provided on at least one contact surface 401 of the isolation member 400.
  • Three elastic members 500 are provided on at least one contact surface 401 of the isolation member 400.
  • four, five or more elastic members 500 are provided on at least one abutment surface 401 of the isolation member 400 .
  • the contact surface 401 of the spacer 400 is used to contact the large surface of the battery cell.
  • the contact surface 401 has at least two support points. , which is beneficial to the stable contact of the battery cells with the contact surface 401 of the isolation component 30 .
  • the number of elastic members 500 provided on the two contact surfaces 401 may be the same or different.
  • the elastic members 500 of the two abutting surfaces 401 of the isolation member 400 may be one and two respectively; or one and three respectively; or two and three respectively; or both two; or both. for three.
  • the elastic member 500 is in a strip shape, and a through channel is formed between at least two elastic members 500 to allow airflow to pass.
  • a penetrating channel for airflow to pass is formed between the large surface of the battery cell, the contact surface 401 and the two elastic members 500 , which is conducive to Heat dissipation of battery cells.
  • the elastic members 500 provided on the two abutting surfaces 401 of the isolation member 400 may be the same or different.
  • the elastic members 500 of the two contact surfaces 401 of the isolation member 400 can be strip-shaped or other shapes respectively.
  • the other shapes can be circular, elliptical, triangular, square, rectangular, rhombus or other regular or irregular shapes. Shape; or all strips.
  • At least two elastic members 500 are parallel to each other.
  • the size of the air inlet and the air outlet of the channel formed by the mutually parallel elastic members 500 are the same, which is beneficial to the circulation of air flow.
  • the isolation member 400 is a rectangular isolation plate, and the length direction of the elastic member 500 is parallel to the edge of the isolation plate.
  • the sides of the rectangular separator plate are generally aligned with the sides of the battery cells.
  • the length direction of the elastic member 500 is parallel to the sides of the separator plate, it is beneficial for the battery cells to be evenly stressed after the elastic member 500 contacts the battery cells. .
  • the isolation plate has opposite long sides and short sides, and the length direction of the elastic member 500 is parallel to the long side or the short side of the isolation plate.
  • the isolation plate has opposite long sides and short sides, and the length direction of the elastic member 500 is parallel to the long side of the isolation plate.
  • the isolation assembly 30 includes two strip-shaped elastic members 500 , and the two elastic members 500 are respectively located at both ends of the isolation plate.
  • the two strip-shaped elastic members 500 can stably contact the two ends of the large surface of the battery cell in the height direction or the length direction, and a penetrating channel is formed between the two elastic members 500 to allow airflow to pass, which is beneficial to Heat dissipation of battery cells.
  • the isolation plate has two ends along the length direction and two ends along the width direction.
  • the two strip-shaped elastic members 500 are respectively parallel to the isolation plate.
  • two short sides when the two elastic members 500 are respectively located at both ends of the isolation plate along the width direction, the two strip-shaped elastic members 500 are respectively parallel to the two long sides of the isolation plate.
  • FIG. 8 is a schematic structural diagram of an isolation component according to a fourth embodiment of the present application.
  • the isolation assembly 30 further includes a cooling flexible bag 600 containing a cooling medium.
  • the cooling flexible bag 600 is disposed on at least one abutment surface 401 of the isolation member 400 .
  • the cooling flexible bag 600 is a sealed bag that can be deformed under extrusion force.
  • the cooling flexible bag 600 is made of polymer material, such as polyvinyl chloride, polypropylene, etc.
  • the cooling medium is a fluid with a large specific heat capacity that can absorb heat and is liquid at the battery operating temperature.
  • the cooling medium is water, methanol, ethanol, ethylene glycol or glycerol.
  • the cooling medium in the cooling flexible bag 600 can absorb the heat released by the battery cells, thereby improving the cooling effect of the battery cells.
  • the cooling flexible bag 600 has a multi-layer structure to prevent the cooling medium from overflowing after local damage.
  • the cooling flexible bag 600 is disposed in the middle of the abutment surface 401 of the isolation member 400 .
  • the cooling flexible bag 600 can contact or be close to a large surface of the battery cells, thereby improving the cooling effect of the battery cells.
  • the isolation assembly 30 includes two elastic members 500 in strip shape.
  • the two elastic members 500 are respectively located at both ends of the isolation plate.
  • a heat dissipation space is formed between the two elastic members 500.
  • the cooling flexible bag 600 is disposed in the heat dissipation space. middle.
  • FIG. 9 is a schematic structural diagram of an isolation component according to a fifth embodiment of the present application.
  • the isolation member 400 has a hollow structure 402 penetrating along the thickness direction.
  • the hollow structure 402 facilitates air circulation, thereby improving the heat dissipation effect of the battery cells.
  • the isolation assembly 30 includes two strip-shaped elastic members 500 , the two elastic members 500 are respectively located at both ends of the isolation plate, and the hollow structure 402 is located between the two elastic members 500 .
  • the height of the elastic member 500 in the thickness direction of the isolation member 400 before compression is 1.5 to 2.5 mm, and the height of the elastic member 500 in the thickness direction of the isolation member 400 after compression is 0.9 to 2.4 mm. .
  • the height of the elastic member 500 in the thickness direction of the isolation member 400 before compression is 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm or 2.5 mm.
  • the height of the elastic member 500 along the thickness direction of the isolation member 400 after compression is 0.9mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm , 2.1mm, 2.2mm, 2.3mm, 2.4mm or 2.5mm.
  • the elastic member 500 has good elasticity, which can not only absorb the tolerance in the length direction of the battery module 40, but also keep the pre-tightening force of the battery module 40 in an appropriate state, which can not only ensure that the battery module 40 passes the strength test, but also reduce the Diving risk of battery cells. Moreover, since the compressed size of the elastic member 500 is small, it does not occupy much space, thereby ensuring that the battery has a high energy density.
  • the force acting on the elastic member 500 to compress the elastic member 500 from the original height of 1.5 to 2.5 mm to 0.9 to 2.4 mm includes the assembly force of the battery module 40 and the expansion force of the battery cells.
  • the assembly force is 1000 ⁇ 6000N
  • the expansion force of the battery cell is 1000 ⁇ 20000N.
  • the height of the elastic member 500 in the thickness direction of the isolation member 400 before compression is 1.8-2.2 mm
  • the height of the elastic member 500 in the thickness direction of the isolation member 400 after compression is 0.9-2.1 mm.
  • FIG. 10 is a schematic structural diagram of a battery module according to some embodiments of the present application.
  • the present application provides a battery module 40 that includes a plurality of battery cells 20 and a plurality of isolation components 30 in the above embodiments.
  • the isolation components 30 are disposed between two adjacent battery cells 20 .
  • the isolation component 30 is disposed between the battery cells 20 to prevent or inhibit heat transfer between the battery cells 20 and limit the thermal runaway battery and its impact to a minimum; at the same time, on the contact surface of the isolation member 400 401 is provided with an elastic member 500.
  • the elastic member 500 can absorb the tolerance in the length direction of the battery module 40, so that the pre-tightening force of the battery module 40 is in an appropriate state, which can not only ensure that the battery module 40 passes the strength test, but also reduce the battery life. Diving risk of single body 20.
  • the multiple isolation components 30 in each battery may be the same or different, that is, the isolation components 30 may all be elastic members 500 and only protrude from one contact surface 401 of the isolation member 400 , or all the isolation components 30 may be elastic members 500
  • Interface 401 is the isolation components 30 may all be elastic members 500 and only protrude from one contact surface 401 of the isolation member 400 , or all the isolation components 30 may be elastic members 500
  • the two contact surfaces 401 protruding from the isolator 400 or part of the elastic member 500 protrudes from only one contact surface 401 of the isolator 400 , and the rest is the elastic member 500 protruding from the two contact surfaces 400 of the isolator 400 .
  • the isolation component 30 includes a first isolation component 50 and a second isolation component 60, wherein the first isolation component 50 is an isolation component 30 in which the elastic member 500 is only protruded from one abutting surface 401 of the isolation member 400.
  • the second isolation component 60 is an isolation component 30 with an elastic member 500 protruding from the two contact surfaces 401 of the isolation member 400.
  • the first isolation component 50 is disposed between the battery cell 20 and the end plate, and has the elastic member 500 to resist.
  • the junction 401 faces the battery cells 20
  • the second isolation component 60 is disposed between two adjacent battery cells 20 .
  • the battery cell 20 has curved first transition areas 24 at both ends along its length direction, and the elastic member 500 does not abut the first transition areas 24 .
  • the first transition area 24 is an area where the large surface and the side surface of the battery cell 20 are connected.
  • the first transition area 24 may have a bending angle or a smooth curved surface.
  • the strength of the first transition zone 24 is low.
  • the force exerted by the elastic member 500 on the battery cell 20 is the reaction force of the assembly force or expansion force exerted by the battery cell 20 on the elastic member 500, which can reach up to 20,000N.
  • the elastic member 500 does not It is in contact with the first transition zone 24 to prevent the first transition zone 24 from being deformed due to a high reaction force squeezing the first transition zone 24 .
  • the battery cell 20 has a welding area 26 and a curved second transition area 25 at both ends along its height direction, and the elastic member 500 does not abut against the second transition area 25 and the welding area. District 26.
  • the second transition area 25 is the area where the large surface and the bottom surface of the battery cell 20 are connected.
  • the second transition area 25 may have a bending angle or a smooth curved surface.
  • the welding area 26 is the area where the casing and the end cover of the battery cell 20 are welded.
  • the strength of the second transition zone 25 and the welding zone 26 is low.
  • the force exerted by the elastic member 500 on the battery cell 20 is the reaction force of the assembly force or expansion force exerted by the battery cell 20 on the elastic member 500, which can reach a maximum of 20000N.
  • the elastic member 500 does not contact the second transition zone 25 , thereby preventing the first transition zone 24 from being greatly deformed by a high reaction force squeezing the second transition zone 25 .
  • the present application provides an isolation assembly 30, which includes an isolation member 400 and an elastic member 500.
  • the isolation member 400 is a rectangular isolation plate, and the isolation member 400 has a thickness along the There are two contact surfaces 401 in opposite directions. Each contact surface 401 is provided with two elastic members 500, and all the elastic members 500 are in the shape of strips. The two elastic members 500 of each contact surface 401 are respectively provided in isolation. The two ends of the plate along the width direction, and the two strip-shaped elastic members 500 are respectively parallel to the two long sides of the isolation plate. A penetrating channel is formed between the two elastic members 500 to allow airflow to pass.
  • the isolation member 400 has a cross-section along the thickness direction.
  • a penetrating hollow structure 402 is located between the two elastic members 500.
  • the height of the elastic member 500 in the thickness direction of the isolation member 400 before compression is 2 mm, and the height of the elastic member 500 in the thickness direction of the isolation member 400 after compression is 0.9. ⁇ 1.9mm.
  • the present application provides a battery module 40, which includes a plurality of battery cells 20 and a plurality of isolation components 30 in the above embodiments.
  • the isolation component 30 includes a first Isolation component 50 and second isolation component 60, wherein the first isolation component 50 is the isolation component 30 in which the elastic member 500 is only protruded on one contact surface 401 of the isolation member 400, and the second isolation component 60 is the elastic member 500 in which the elastic member 500 is protruding.
  • the first isolation component 50 is disposed between the battery cell 20 and the end plate, and the contact surface 401 of the elastic member 500 faces the battery cell 20.
  • the two isolation components 60 are disposed between two adjacent battery cells 20.
  • the battery cells 20 have curved first transition regions 24 at both ends along the length direction of the battery cells 20.
  • the battery cells 20 have curved first transition regions 24 at both ends along the height direction.
  • the elastic member 500 does not abut the first transition zone 24 , the second transition zone 25 and the welding zone 26 .

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  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
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  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请提供一种隔离组件、电池模组、电池和用电装置，涉及电池技术领域。隔离组件用于设置于电池单体之间，包括隔离件和弹性件，隔离件具有沿厚度方向相对的两个抵接面。弹性件凸设于隔离件的至少一个抵接面。隔离组件能够用于设置于电池单体之间，阻止或抑制电池单体之间的热传递，将热失控电池及其影响限制在最小范围内；同时，在隔离件的抵接面设置弹性件，弹性件可以吸收电池模组长度方向上的公差，使得电池模组的预紧力处于合适的状态，既能保证电池模组通过强度测试，还能够降低电池单体的跳水风险。

Description

一种隔离组件、电池模组、电池和用电装置
相关申请的交叉引用
本申请要求享有于2022年07月04日提交的名称为“一种隔离组件、电池模组、电池和用电装置”的中国专利申请2022216933691的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池技术领域，具体而言，涉及一种隔离组件、电池模组、电池和用电装置。
背景技术
锂离子电池储能作为目前主要的电能存储方式，广泛应用于电力、电动汽车以及其他相关设备中，从锂离子电池起火爆炸事故看，往往是由模块内单个电池故障、发生热失控开始，单个电池热失控产生的热量再传递到临近电池，进而引发连锁反应，导致整个电池系统全部烧毁。
发明内容
鉴于上述问题，本申请提供一种隔离组件、电池模组、电池和用电装置，其能够阻止或抑制电池单体之间的热传递。
第一方面，本申请提供一种隔离组件，用于设置于电池单体之间，包括：隔离件和弹性件，隔离件具有沿厚度方向相对的两个抵接面。弹性件凸设于隔离件的至少一个抵接面。
本申请实施例的技术方案中，隔离组件能够用于设置于电池单体之间，阻止或抑制电池单体之间的热传递，将热失控电池及其影响限制在最小范围内；同时，在隔离件的抵接面设置弹性件，弹性件可以吸收电池模组长度方向上的公差，使得电池模组的预紧力处于合适的状态，既能保证电池模组通过强度测试，还能够降低电池单体的跳水风险。
在一些实施例中，隔离件的至少一个抵接面上设置有至少两个弹性件。隔离件的抵接面用于抵接电池单体的大面，当隔离件的抵接面上设置有至少两个弹性件时，抵接面至少有两个支撑位点，有利于电池单体稳定抵接于隔离组件的抵接面。
在一些实施例中，弹性件呈条状，且至少两个弹性件之间形成允许气流通过的贯穿的通道。在至少两个弹性件的端部抵接于电池单体的大面后，电池单体的大面、抵接面以及两个弹性件之间形成气流通过的贯穿的通道，有利于电池单体的散热。
在一些实施例中，至少两个弹性件相互平行。相互平行的弹性件形成的通道的进气口和出气口的大小相同，有利于气流的流通。
在一些实施例中，隔离件为矩形的隔离板，弹性件的长度方向平行于隔离板的边。矩形的隔离板的边一般对齐于电池单体的边，当弹性件的长度方向平行于隔离板的边时，有利于在弹性件抵接于电池单体后，电池单体受力均匀。
在一些实施例中，隔离组件包括呈条状的两个弹性件，两个弹性件分别位于隔离板的两端。两个呈条状的弹性件能够分别稳定抵接于电池单体的大面沿高度方向或长度方向的两端，且两个弹性件之间形成允许气流通过的贯穿的通道，有利于电池单体的散热。
在一些实施例中，隔离组件还包括含有冷却介质的冷却柔性袋，冷却柔性袋设置于隔离件的至少一个抵接面上。冷却柔性袋中的冷却介质能够吸收电池单体放出的热量，从而提高电池单体的冷却效果。
在一些实施例中，冷却柔性袋设置于隔离件的抵接面的中部。在将隔离组件设置于电池单体之间后，冷却柔性袋能够接触或靠近电池单体的大面，提高电池单体的冷却效果。
在一些实施例中，隔离件具有沿厚度方向贯穿的镂空结构。镂空结构有利于空气的流通，从而提高电池单体的散热效果。
在一些实施例中，弹性件压缩前沿隔离件的厚度方向的高度为1.5～2.5mm，弹性件压缩后沿隔离件的厚度方向的高度为0.9～2.4mm。弹性件具有较好的弹性，既能够吸收电池模组长度方向上的公差，使得电池模组的预紧力处于合适的状态，既能保证电池模组通过强度测试，还能够降低电池单体的跳水风险。并且由于弹性件压缩后的尺寸较小，不会占据太多空间，从而确保电池具有较高的能量密度。
第二方面，本申请提供了一种电池模组，其包括多个电池单体和多个上述实施例中的隔离组件，隔离组件设置于相邻两个电池单体之间。
本申请实施例的技术方案中，隔离组件设置于电池单体之间，用于阻止或抑制电池单体之间的热传递，将热失控电池及其影响限制在最小范围内；同时，在隔离件的抵接面设置弹性件，弹性件可以吸收电池模组长度方向上的公差，使得电池模组的预紧力处于合适的状态，既能保证电池模组通过强度测试，还能够降低电池单体的跳水风险。
在一些实施例中，电池单体在沿其长度方向的两端具有弯曲的第一过渡区，弹性件不抵接于第一过渡区。第一过渡区的强度较低，弹性件对于电池单体的作用力为电池单体施加给弹性件的组装力或膨胀力的反作用力，最高可达到20000N，弹性件不抵接于第一过渡区，从而避免较高的反作用力挤压第一过渡区后使得第一过渡区发生较大的形变。
在一些实施例中，电池单体沿其高度方向的两端具有焊接区和弯曲的第二过渡区，弹性件不抵接于第二过渡区和焊接区。第二过渡区和焊接区的强度较低，弹性件对于电池单体的作用力为电池单体施加给弹性件的组装力或膨胀力的反作用力，最高可达到20000N，弹性件不抵接于第二过渡区和焊接区，从而避免较高的反作用力挤压第二过渡区和焊接区后使得第一过渡区发生较大的形变。
第三方面，本申请提供了一种电池，其包括上述实施例中的电池模组。
第四方面，本申请提供了一种用电装置，其包括上述实施例中的电池，用电装置用于提供电能。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读对下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在全部附图中，用相同的附图标号表示相同的部件。在附图中：
图1为本申请一些实施例的车辆的结构示意图；
图2为本申请一些实施例的电池的分解结构示意图；
图3为本申请一些实施例的电池单体的分解结构示意图；
图4为本申请第一种实施例的隔离组件的结构示意图；
图5为本申请第一种实施例的隔离组件的侧视图；
图6为本申请第二种实施例的隔离组件的侧视图；
图7为本申请第三种实施例的隔离组件的结构示意图；
图8为本申请第四种实施例的隔离组件的结构示意图；
图9为本申请第五种实施例的隔离组件的结构示意图；
图10为本申请一些实施例的电池模组的结构示意图。
具体实施方式中的附图标号如下：
1000-车辆；
100-电池；200-控制器；300-马达；
10-箱体；11-第一部分；12-第二部分；
20-电池单体；21-端盖；22-壳体；23-电极组件；
30-隔离组件；400-隔离件；401-抵接面；402-镂空结构；500-弹性件；600-冷却柔性袋；40-电池模组；24-第一过渡区；25-第二过渡区；26-焊接区；50-第一隔离组件；60-第二隔离组件。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
本发明人注意到，锂离子电池体系对温度敏感，温度过高易引起热失控，从而导致起火、燃烧、爆炸。因此，保证锂离子电池整个生命周期的温度处于合理的范围之内是避免出现起火、爆 炸的重要措施。从锂离子电池起火爆炸事故看，往往是由模块内单个电池故障、发生热失控开始，单个电池热失控产生的热量再传递到临近电池，进而引发连锁反应，导致整个电池系统全部烧毁。
为了阻止或抑制电池单体之间的热传递，申请人研究发现，可以在电池模组中的电池单体之间设置隔离组件，隔离组件能够阻止或抑制电池单体之间的热传递，将热失控电池及其影响限制在最小范围内。
并且，发明人还发现，当电池单体和隔离组件的厚度偏下限时，装配得到的电池模组在长度方向的预紧力不够，在此情况下，仅靠端侧板支撑模组强度，模组主频过低，强度测试失效风险大；当电池单体和隔离组件的厚度偏上限时，装备得到的电池模组在长度方向的预紧力过大，电池单体存在跳水风险，导致电池容量变小，电解液来不及流动。
基于以上考虑，为了阻止或抑制电池单体之间的热传递并且使得电池模组的预紧力处于合适的状态，发明人经过深入研究，设计了一种隔离组件，隔离组件能够用于设置于电池单体之间，阻止或抑制电池单体之间的热传递，将热失控电池及其影响限制在最小范围内；同时，在隔离件的抵接面设置弹性件，弹性件可以吸收电池模组长度方向上的公差，使得电池模组的预紧力处于合适的状态，既能保证电池模组通过强度测试，还能够降低电池单体的跳水风险。
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。电池一般包括用于封装一个或多个电池单体的电池箱体，电池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。
电池单体可以包括锂离子二次电池单体、锂离子一次电池单体、锂硫电池单体、钠锂离子电池单体、钠离子电池单体或镁离子电池单体等，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：圆柱电池单体、方形电池单体和软包电池单体。
电池单体包括电极组件和电解液，电极组件由正极极片、负极极片和隔离膜组成。电池单体主要依靠金属离子在正极极片和负极极片之间移动来工作。正极极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面，未涂敷正极活性物质层的正极集流体凸出于已涂覆正极活性物质层的正极集流体，未涂敷正极活性物质层的正极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负极集流体凸出于已涂覆负极活性物质层的负极集流体，未涂敷负极活性物质层的负极集流体作负极极耳。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(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。
电池单体还包括集流构件，集流构件用于将电池单体的极耳和电极端子电连接，以将电能从电极组件输送至电极端子，经电极端子输送至电池单体的外部；多个电池单体之间通过汇流部件实现电连接，以实现多个电池单体的串联、并联或者混联。
电池还包括采样端子和电池管理系统，采样端子连接于汇流部件，用于采集电池单体的信息，例如电压或者温度等等。采样端子将所采集到的电池单体的信息传递至电池管理系统，电池管理系统检测到电池单体的信息超出正常范围时，会限制电池的输出功率以实现安全防护。
可以理解的是，本申请实施例中描述的使用电池所适用的用电装置可以为多种形式，例如，手机、便携式设备、笔记本电脑、电瓶车、电动汽车、轮船、航天器、电动玩具和电动工具等等，例如，航天器包括飞机、火箭、航天飞机和宇宙飞船等等，电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等，电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨。
本申请的实施例描述的电池单体以及电池不仅仅局限适用于上述所描述的用电装置，还可以适用于所有使用电池单体以及电池的用电装置，但为描述简洁，下述实施例均以电动汽车为例进 行说明。
请参阅图1，图1为本申请一些实施例提供的车辆的结构示意图。车辆1000可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1000的内部设置有电池100，电池100可以设置在车辆1000的底部或头部或尾部。电池100可以用于车辆1000的供电，例如，电池100可以作为车辆1000的操作电源。车辆1000还可以包括控制器200和马达300，控制器200用来控制电池100为马达300供电，例如，用于车辆1000的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中，电池100不仅仅可以作为车辆1000的操作电源，还可以作为车辆1000的驱动电源，代替或部分地代替燃油或天然气为车辆1000提供驱动动力。
请参照图2，图2为本申请一些实施例提供的电池的爆炸图。电池100包括箱体10和电池单体20，电池单体20容纳于箱体10内。其中，箱体10用于为电池单体20提供容纳空间，箱体10可以采用多种结构。在一些实施例中，箱体10可以包括第一部分11和第二部分12，第一部分11与第二部分12相互盖合，第一部分11和第二部分12共同限定出用于容纳电池单体20的容纳空间。第二部分12可以为一端开口的空心结构，第一部分11可以为板状结构，第一部分11盖合于第二部分12的开口侧，以使第一部分11与第二部分12共同限定出容纳空间；第一部分11和第二部分12也可以是均为一侧开口的空心结构，第一部分11的开口侧盖合于第二部分12的开口侧。当然，第一部分11和第二部分12形成的箱体10可以是多种形状，比如，圆柱体、长方体等。
在电池100中，电池单体20可以是多个，多个电池单体20之间可串联或并联或混联，混联是指多个电池单体20中既有串联又有并联。多个电池单体20之间可直接串联或并联或混联在一起，再将多个电池单体20构成的整体容纳于箱体10内；当然，电池100也可以是多个电池单体20先串联或并联或混联组成电池模块形式，多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体10内。电池100还可以包括其他结构，例如，该电池100还可以包括汇流部件，用于实现多个电池单体20之间的电连接。
其中，每个电池单体20可以为二次电池或一次电池；还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。电池单体20可呈圆柱体、扁平体、长方体或其它形状等。
请参照图3，图3为本申请一些实施例提供的电池单体的分解结构示意图。电池单体20是指组成电池的最小单元。如图3，电池单体20包括有端盖21、壳体22、电极组件23以及其他的功能性部件。
端盖21是指盖合于壳体22的开口处以将电池单体20的内部环境隔绝于外部环境的部件。不限地，端盖21的形状可以与壳体22的形状相适应以配合壳体22。可选地，端盖21可以由具有一定硬度和强度的材质(如铝合金)制成，这样，端盖21在受挤压碰撞时就不易发生形变，使电池单体20能够具备更高的结构强度，安全性能也可以有所提高。端盖21上可以设置有如电极端子等的功能性部件。电极端子可以用于与电极组件23电连接，以用于输出或输入电池单体20的电能。在一些实施例中，端盖21上还可以设置有用于在电池单体20的内部压力或温度达到阈值时泄放内部压力的泄压机构。端盖21的材质也可以是多种的，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。在一些实施例中，在端盖21的内侧还可以设置有绝缘件，绝缘件可以用于隔离壳体22内的电连接部件与端盖21，以降低短路的风险。示例性的，绝缘件可以是塑料、橡胶等。
壳体22是用于配合端盖21以形成电池单体20的内部环境的组件，其中，形成的内部环境可以用于容纳电极组件23、电解液以及其他部件。壳体22和端盖21可以是独立的部件，可以于壳体22上设置开口，通过在开口处使端盖21盖合开口以形成电池单体20的内部环境。不限地，也可以使端盖21和壳体22一体化，具体地，端盖21和壳体22可以在其他部件入壳前先形成一个共同的连接面，当需要封装壳体22的内部时，再使端盖21盖合壳体22。壳体22可以是多种形状和多种尺寸的，例如长方体形、圆柱体形、六棱柱形等。具体地，壳体22的形状可以根据电极组件23的具体形状和尺寸大小来确定。壳体22的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。
电极组件23是电池单体20中发生电化学反应的部件。壳体22内可以包含一个或更多个电极组件23。电极组件23主要由正极片和负极片卷绕或层叠放置形成，并且通常在正极片与负极片之间设有隔膜。正极片和负极片具有活性物质的部分构成电极组件的主体部，正极片和负极片不具有活性物质的部分各自构成极耳。正极极耳和负极极耳可以共同位于主体部的一端或是分别位于主体部的两端。在电池的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极耳连接电极端子以形成电流回路。
根据本申请的一些实施例，请参阅图4～6，图4为本申请第一种实施例的隔离组件的结构示意图，图5为本申请第一种实施例的隔离组件的侧视图，图6为本申请第二种实施例的隔离组件的侧视图。
本申请提供了一种隔离组件30，用于设置于电池单体之间，包括：隔离件400和弹性件500，隔离件400具有沿厚度方向相对的两个抵接面401。弹性件500凸设于隔离件400的至少一个抵接面401。
隔离件400为用于设置于两个电池单体之间或电池单体、端板之间，使得两个电池单体隔开或电池单体和端板隔开的部件，从而避免两个电池单体直接抵接，或电池单体直接抵接于端板。
作为示例，隔离件400可以为板状结构。
抵接面401为用于抵接于电池单体的大面的面。
弹性件500为由弹性模量较小的材料制成的凸设于隔离件400的部件，弹性件500的弹性模量小于隔离件400的弹性模量。在受到电池模组40的装配力或电池单体的膨胀力后，弹性件500能够沿受力方向发生较大的形变。
作为示例，弹性件500由橡胶材料制成。
隔离组件30能够用于设置于电池单体之间，阻止或抑制电池单体之间的热传递，将热失控电池及其影响限制在最小范围内；同时，在隔离件400的抵接面401设置弹性件500，弹性件500可以吸收电池模组40长度方向上的公差，使得电池模组40的预紧力处于合适的状态，既能保证电池模组40通过强度测试，还能够降低电池单体的跳水风险。
请参阅图5，可选地，弹性件500凸设于隔离件400的两个抵接面401。
当隔离件400的两个抵接面401均设置有弹性件500时，隔离组件30能够设置于两个电池单体之间或电池单体、端板之间。当隔离组件30能够设置于两个电池单体之间时，隔离组件30以弹性件500抵接于相邻的一个电池单体，以及以一个抵接面401直接抵接于相邻的另一个电池单体。
请参阅图6，可选地，弹性件500仅凸设于隔离件400的一个抵接面401。
当隔离件400只有一个抵接面401设置有弹性件500时，隔离组件30能够设置于两个电池单体之间或电池单体、端板之间。当隔离组件30设置于两个电池单体之间时，隔离组件30以弹性件500抵接于相邻的一个电池单体，以及以一个抵接面401直接抵接于相邻的另一个电池单体。
根据本申请的一些实施例，可选地，请参阅图5和7，图7为本申请第三种实施例的隔离组件的结构示意图。隔离件400的至少一个抵接面401上设置有至少两个弹性件500。
作为示例，请参阅图5，隔离件400的至少一个抵接面401上设置有两个弹性件500；请参阅图7，隔离件400的至少一个抵接面401上设置有三个弹性件500；在其他一些实施例中，隔离件400的至少一个抵接面401上设置有四个、五个或更多个弹性件500。
隔离件400的抵接面401用于抵接电池单体的大面，当隔离件400的抵接面401上设置有至少两个弹性件500时，抵接面401至少有两个支撑位点，有利于电池单体稳定抵接于隔离组件30的抵接面401。
当隔离件400的两个抵接面401均设置有弹性件500时，两个抵接面401设置的弹性件500数量可以相同或不同。
作为示例，隔离件400的两个抵接面401的弹性件500可以分别为一个和二个；或分别为一个和三个；或分别为两个和三个；或均为两个；或均为三个。
根据本申请的一些实施例，可选地，弹性件500呈条状，且至少两个弹性件500之间形成允许气流通过的贯穿的通道。
在至少两个弹性件500的端部抵接于电池单体的大面后，电池单体的大面、抵接面401以及两个弹性件500之间形成气流通过的贯穿的通道，有利于电池单体的散热。
当隔离件400的两个抵接面401均设置有弹性件500时，两个抵接面401设置的弹性件500可以相同或不同。
作为示例，隔离件400的两个抵接面401的弹性件500可以分别为条状和其他形状，其他形状可以为圆形、椭圆形、三角形、正方形、长方形、菱形或其他规则、不规则的形状；或均为条状。
根据本申请的一些实施例，可选地，至少两个弹性件500相互平行。
相互平行的弹性件500形成的通道的进气口和出气口的大小相同，有利于气流的流通。
需要说明的是，当至少两个弹性件500交叉设置时，电池单体的大面、抵接面401以及两个弹性件500之间无法形成气流通过的贯穿的通道，不利于电池单体的散热。
根据本申请的一些实施例，可选地，隔离件400为矩形的隔离板，弹性件500的长度方向平行于隔离板的边。
矩形的隔离板的边一般对齐于电池单体的边，当弹性件500的长度方向平行于隔离板的边时，有利于在弹性件500抵接于电池单体后，电池单体受力均匀。
可选地，隔离板具有相对的长边和短边，弹性件500的长度方向平行于隔离板的长边或短边。
可选地，可选地，隔离板具有相对的长边和短边，弹性件500的长度方向平行于隔离板的长边。
根据本申请的一些实施例，可选地，隔离组件30包括呈条状的两个弹性件500，两个弹性件500分别位于隔离板的两端。
两个呈条状的弹性件500能够分别稳定抵接于电池单体的大面沿高度方向或长度方向的两端，且两个弹性件500之间形成允许气流通过的贯穿的通道，有利于电池单体的散热。
可选地，隔离板具有沿长度方向的两端和沿宽度方向的两端，当两个弹性件500分别位于隔离板沿长度方向的两端，两个条状弹性件500分别平行于隔离板的两个短边；当两个弹性件500分别位于隔离板沿宽度方向的两端时，两个条状弹性件500分别平行于隔离板的两个长边。
根据本申请的一些实施例，可选地，请参阅图8，图8为本申请第四种实施例的隔离组件的结构示意图。隔离组件30还包括含有冷却介质的冷却柔性袋600，冷却柔性袋600设置于隔离件400的至少一个抵接面401上。
冷却柔性袋600为可在挤压作用力下发生形变的密封袋。
作为示例，冷却柔性袋600由高分子材料制成，如聚氯乙烯、聚丙烯等。
冷却介质为比热容较大且能够吸收热量，并在电池使用温度下呈液态的流体。
作为示例，冷却介质为水、甲醇、乙醇、乙二醇或丙三醇。
冷却柔性袋600中的冷却介质能够吸收电池单体放出的热量，从而提高电池单体的冷却效果。
可选地，冷却柔性袋600具有多层结构，从而避免局部破损后，冷却介质溢出。
根据本申请的一些实施例，可选地，冷却柔性袋600设置于隔离件400的抵接面401的中部。
在将隔离组件30设置于电池单体之间后，冷却柔性袋600能够接触或靠近电池单体的大面，提高电池单体的冷却效果。
可选地，隔离组件30包括呈条状的两个弹性件500，两个弹性件500分别位于隔离板的两端，两个弹性件500之间形成散热空间，冷却柔性袋600设置于散热空间中。
根据本申请的一些实施例，可选地，请参阅图9，图9为本申请第五种实施例的隔离组件的结构示意图。隔离件400具有沿厚度方向贯穿的镂空结构402。
镂空结构402有利于空气的流通，从而提高电池单体的散热效果。
可选地，隔离组件30包括呈条状的两个弹性件500，两个弹性件500分别位于隔离板的两端，镂空结构402位于两个弹性件500之间。
根据本申请的一些实施例，可选地，弹性件500压缩前沿隔离件400的厚度方向的高度为1.5～2.5mm，弹性件500压缩后沿隔离件400的厚度方向的高度为0.9～2.4mm。
作为示例，弹性件500压缩前沿隔离件400的厚度方向的高度为1.5mm、1.6mm、1.7mm、1.8mm、1.9mm、2.0mm、2.1mm、2.2mm、2.3mm、2.4mm或2.5mm。
作为示例，弹性件500压缩后沿隔离件400的厚度方向的高度为0.9mm、1.1mm、1.2mm、1.3mm、1.4mm、1.5mm、1.6mm、1.7mm、1.8mm、1.9mm、2.0mm、2.1mm、2.2mm、2.3mm、2.4mm或2.5mm。
弹性件500具有较好的弹性，既能够吸收电池模组40长度方向上的公差，使得电池模组40的预紧力处于合适的状态，既能保证电池模组40通过强度测试，还能够降低电池单体的跳水风险。并且由于弹性件500压缩后的尺寸较小，不会占据太多空间，从而确保电池具有较高的能量密度。
可选地，作用于弹性件500使得弹性件500由原高度1.5～2.5mm压缩为0.9～2.4mm的作用力包括电池模组40的组装力和电池单体的膨胀力，电池模组40的组装力为1000～6000N，电池单体的膨胀力为1000～20000N。
可选地，弹性件500压缩前沿隔离件400的厚度方向的高度为1.8～2.2mm，弹性件500压缩后沿隔离件400的厚度方向的高度为0.9～2.1mm。
根据本申请的一些实施例，请参阅图10，图10为本申请一些实施例的电池模组的结构示意图。
本申请提供了一种电池模组40，其包括多个电池单体20和多个上述实施例中的隔离组件30，隔离组件30设置于相邻两个电池单体20之间。
隔离组件30设置于电池单体20之间，用于阻止或抑制电池单体20之间的热传递，将热失控电池及其影响限制在最小范围内；同时，在隔离件400的抵接面401设置弹性件500，弹性件500可以吸收电池模组40长度方向上的公差，使得电池模组40的预紧力处于合适的状态，既能保证电池模组40通过强度测试，还能够降低电池单体20的跳水风险。
需要说明的是，每个电池中的多个隔离组件30可以相同或不同，即隔离组件30可以全部是弹性件500只凸设于隔离件400的一个抵接面401，或全部是弹性件500凸设于隔离件400的两个抵接面401，或部分是弹性件500只凸设于隔离件400的一个抵接面401，余下的是弹性件500凸设于隔离件400的两个抵接面401。
可选地，隔离组件30包括第一隔离组件50和第二隔离组件60，其中，第一隔离组件50为弹性件500只凸设于隔离件400的一个抵接面401的隔离组件30，第二隔离组件60为弹性件500凸设于隔离件400的两个抵接面401的隔离组件30，第一隔离组件50设置于电池单体20和端板之间，且具有弹性件500的抵接面401面向电池单体20，第二隔离组件60设置于相邻两个电池 单体20之间。
根据本申请的一些实施例，可选地，电池单体20在沿其长度方向的两端具有弯曲的第一过渡区24，弹性件500不抵接于第一过渡区24。
第一过渡区24为电池单体20的大面和侧面连接的区域，第一过渡区24可能存在弯折角或平滑的弯曲面。
第一过渡区24的强度较低，弹性件500对于电池单体20的作用力为电池单体20施加给弹性件500的组装力或膨胀力的反作用力，最高可达到20000N，弹性件500不抵接于第一过渡区24，从而避免较高的反作用力挤压第一过渡区24后使得第一过渡区24发生较大的形变。
根据本申请的一些实施例，可选地，电池单体20沿其高度方向的两端具有焊接区26和弯曲的第二过渡区25，弹性件500不抵接于第二过渡区25和焊接区26。
第二过渡区25为电池单体20的大面和底面连接的区域，第二过渡区25可能存在弯折角或平滑的弯曲面。
焊接区26为电池单体20的壳体和端盖焊接的区域。
第二过渡区25和焊接区26的强度较低，弹性件500对于电池单体20的作用力为电池单体20施加给弹性件500的组装力或膨胀力的反作用力，最高可达到20000N，弹性件500不抵接于第二过渡区25，从而避免较高的反作用力挤压第二过渡区25后使得第一过渡区24发生较大的形变。
根据本申请的一些实施例，请参阅图5和9，本申请提供了一种隔离组件30，其包括隔离件400和弹性件500，隔离件400为矩形的隔离板，隔离件400具有沿厚度方向相对的两个抵接面401，每个抵接面401设置有两个弹性件500，且所有弹性件500均呈条状，每个抵接面401的两个弹性件500分别设置于隔离板沿宽度方向的两端，且两个条状弹性件500分别平行于隔离板的两个长边，两个弹性件500之间形成允许气流通过的贯穿的通道，隔离件400具有沿厚度方向贯穿的镂空结构402，镂空结构402位于两个弹性件500之间，弹性件500压缩前沿隔离件400的厚度方向的高度为2mm，弹性件500压缩后沿隔离件400的厚度方向的高度为0.9～1.9mm。
根据本申请的一些实施例，请参阅图10，本申请提供了一种电池模组40，其包括多个电池单体20和多个上述实施例中的隔离组件30，隔离组件30包括第一隔离组件50和第二隔离组件60，其中，第一隔离组件50为弹性件500只凸设于隔离件400的一个抵接面401的隔离组件30，第二隔离组件60为弹性件500凸设于隔离件400的两个抵接面401的隔离组件30，第一隔离组件50设置于电池单体20和端板之间，且具有弹性件500的抵接面401面向电池单体20，第二隔离组件60设置于相邻两个电池单体20之间，电池单体20在沿其长度方向的两端具有弯曲的第一过渡区24，电池单体20沿其高度方向的两端具有焊接区26和弯曲的第二过渡区25，弹性件500不抵接于第一过渡区24、第二过渡区25和焊接区26。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。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 (15)

  1. 一种隔离组件，用于设置于电池单体之间，其中，所述隔离组件包括：
    隔离件，所述隔离件具有沿厚度方向相对的两个抵接面；
    弹性件，所述弹性件凸设于所述隔离件的至少一个所述抵接面。
  2. 根据权利要求1所述的隔离组件，其中，所述隔离件的至少一个所述抵接面上设置有至少两个所述弹性件。
  3. 根据权利要求2所述的隔离组件，其中，所述弹性件呈条状，且所述至少两个所述弹性件之间形成允许气流通过的贯穿的通道。
  4. 根据权利要求3所述的隔离组件，其中，所述至少两个所述弹性件相互平行。
  5. 根据权利要求1～4任一项所述的隔离组件，其中，所述隔离件为矩形的隔离板，所述弹性件的长度方向平行于所述隔离板的边。
  6. 根据权利要求5所述的隔离组件，其中，所述隔离组件包括两个呈条状的所述弹性件，两个所述弹性件分别位于所述隔离板的两端。
  7. 根据权利要求1～6任一项所述的隔离组件，其中，所述隔离组件还包括含有冷却介质的冷却柔性袋，所述冷却柔性袋设置于所述隔离件的至少一个所述抵接面上。
  8. 根据权利要求7所述的隔离组件，其中，所述冷却柔性袋设置于所述隔离件的所述抵接面的中部。
  9. 根据权利要求1～8任一项所述的隔离组件，其中，所述隔离件具有沿厚度方向贯穿的镂空结构。
  10. 根据权利要求1～8任一项所述的隔离组件，其中，所述弹性件压缩前沿所述隔离件的厚度方向的高度为1.5～2.5mm，所述弹性件压缩后沿所述隔离件的厚度方向的高度为0.9～2.4mm。
  11. 一种电池模组，其中，所述电池模组包括多个电池单体和多个权利要求1～10任一项所述的隔离组件，所述隔离组件设置于相邻两个所述电池单体之间。
  12. 根据权利要求11所述的电池模组，其中，所述电池单体在沿其长度方向的两端具有弯曲的第一过渡区，所述弹性件不抵接于所述第一过渡区。
  13. 根据权利要求11或12所述的电池模组，其中，所述电池单体沿其高度方向的两端具有焊接区和弯曲的第二过渡区，所述弹性件不抵接于所述第二过渡区和所述焊接区。
  14. 一种电池，其中，所述电池包括权利要求11～13任一项所述的电池模组。
  15. 一种用电装置，其中，所述用电装置包括权利要求14所述的电池，所述用电装置用于提供电能。
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