CN219534642U

CN219534642U - Thermal management assembly, battery and power utilization device

Info

Publication number: CN219534642U
Application number: CN202320015597.1U
Authority: CN
Inventors: 宋飞亭; 侯跃攀; 黄小腾; 陈智明
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-06-14
Filing date: 2023-01-04
Publication date: 2023-08-15
Anticipated expiration: 2033-01-04
Also published as: CN116802898A; WO2023240460A1

Abstract

The embodiment of the application provides a thermal management assembly, a battery and an electricity utilization device, and relates to the technical field of batteries. The thermal management assembly includes a heat exchange layer and a compressible layer in a stacked arrangement. The compressible layer has a modulus of elasticity that is less than the modulus of elasticity of the heat exchange layer. The heat management component is used for being applied to the battery, and the heat exchange layer can improve the heat exchange efficiency of the battery and improve the heat dissipation capacity of the battery; the elastic modulus of the compressible layer is small, and after the compressible layer is subjected to the expansion force released by the battery cells, the compressible layer can deform along the acting direction of the expansion force of the battery cells, so that the expansion space of the battery cells is ensured, the whole battery module is prevented from generating larger deformation, the compressible layer is favorable for absorbing tolerance when the battery is assembled, and the compressible layer is convenient to install and maintain the compact structure of the battery.

Description

Thermal management assembly, battery and power utilization device

Cross Reference to Related Applications

The present application claims priority from PCT patent application PCT/CN2022/098727 entitled "a thermal management assembly, battery and electrical device," filed on 14, 2022, 06, the entire contents of which are incorporated herein by reference.

Technical Field

The present utility model relates to the field of battery technologies, and in particular, to a thermal management assembly, a battery, and an electrical device.

Background

The battery monomer can emit a large amount of heat at the during operation, if the inside heat of battery can not in time discharge, the problem of battery inside can rise continually, leads to the battery monomer to need work under higher temperature, seriously influences the life-span of battery, probably causes thermal runaway when serious, causes incident such as explosion on fire even. And the battery cells expand during cycling ultimately resulting in deformation and expansion of the battery housing.

Disclosure of Invention

In view of the above, the present utility model provides a thermal management assembly, a battery, and an electric device, which are capable of improving heat exchange efficiency of the battery and absorbing a portion of swelling of a battery cell.

In a first aspect, the present utility model provides a thermal management assembly comprising: heat exchange layers and compressible layers are arranged in a stack. The compressible layer has a modulus of elasticity that is less than the modulus of elasticity of the heat exchange layer.

In the technical scheme of the embodiment of the utility model, the heat management component is used for being applied to the battery, and the heat exchange layer can improve the heat exchange efficiency of the battery and the heat dissipation capacity of the battery; the elastic modulus of the compressible layer is small, and after the compressible layer is subjected to the expansion force released by the battery cells, the compressible layer can deform along the acting direction of the expansion force of the battery cells, so that the expansion space of the battery cells is ensured, the whole battery module is prevented from generating larger deformation, the compressible layer is favorable for absorbing tolerance when the battery is assembled, and the compressible layer is convenient to install and maintain the compact structure of the battery.

In some embodiments, the compressible layer includes a compressible cavity. After receiving the expansion force released by the battery cell, the gas of the compressible cavity is compressed so that the compressible layer deforms along the direction of the expansion force of the battery cell.

In some embodiments, the compressible cavity is filled with a phase change material or an elastic material. When the compressible cavity is filled with the phase change material, the heat capacity of the battery can be improved, so that the thermal management component can realize the function of preserving heat of the battery cell or absorbing heat of the battery cell; when the compressible cavity is filled with the elastic material, the elastic material has better elasticity, after the elastic material is subjected to the expansion force released by the battery unit, the elastic material is compressed so that the compressible layer deforms along the acting direction of the expansion force of the battery unit, and rebound is realized after the expansion force disappears, and in addition, the supporting strength of the compressible layer can be increased by the elastic material.

In some embodiments, the heat exchange layer includes a heat exchange cavity for containing a heat exchange medium. The heat exchange layer can be used for holding heat exchange medium, and heat exchange medium can absorb the heat that the battery monomer released or to the battery monomer heating, improves the heat exchange efficiency of battery.

In some embodiments, a first support is disposed in the heat exchange chamber. The first support can be used to improve the strength of the heat exchange layer to avoid a large deformation of the heat exchange layer after receiving the expansion force released by the battery cells.

In some embodiments, the first support has a modulus of elasticity that is greater than the modulus of elasticity of the compressible layer. Because the elastic modulus of the compressible layer is smaller than that of the first supporting piece, deformation is easier to occur, after the thermal management component is subjected to the expansion force released by the battery unit, the compressible layer can be greatly deformed along the acting direction of the expansion force of the battery unit, and the heat exchange layer can not be deformed basically.

In some embodiments, the heat exchange layer and the compressible layer are arranged in a stack along a first direction, and the first support is supported in the heat exchange cavity along the first direction. When the thermal management assembly is applied to the battery, the battery cell is generally abutted to the thermal management assembly along the first direction, the expansion force released by the subsequent battery cell is basically along the first direction, the first supporting piece supported in the heat exchange cavity along the first direction can greatly improve the elastic modulus of the heat exchange layer, the compressible layer can be greatly deformed along the first direction after the thermal management assembly is subjected to the expansion force released by the battery cell along the first direction, and the heat exchange layer is basically not deformed.

In some embodiments, the compressible layer is disposed in the heat exchange cavity. The heat exchange cavities are arranged at the two ends of the heat management assembly along the stacking direction, so that the heat exchange efficiency of the battery monomers at the two ends of the heat management assembly can be effectively improved, and the temperature of the whole battery is kept at a lower level.

In some embodiments, a first connection structure is also provided in the heat exchange chamber for securing the compressible layer in the heat exchange chamber. The first connection structure is capable of securing the compressible layer to prevent a change in position of the compressible layer relative to the heat exchange cavity.

In some embodiments, a heat exchange space is defined between an outer wall of the compressible layer and an inner wall of the heat exchange cavity, and the first connection structure is disposed in the heat exchange space and divides the heat exchange space into a plurality of flow channels. The multiple flow channels are beneficial to circulating circulation of heat exchange medium in the heat exchange space, and higher temperature of the local heat management component is avoided.

In some embodiments, the compressible layer includes a first compressible tube, the heat exchange layer includes a first heat exchange tube, and the first compressible tube is sleeved in the first heat exchange tube. The heat management component is formed by sleeving the first compressible pipe and the first heat exchange pipe, and is beneficial to forming of the heat management component.

In some embodiments, the heat exchange layer is disposed in the compressible cavity. The heat management component is provided with heat exchange cavities at two ends along the stacking direction, so that the deformation capacity of the heat management component can be effectively improved, and the heat management component can generate better deformation after being subjected to the expansion force released by the battery cells at two ends along the stacking direction so as to absorb the expansion part released by the battery cells.

In some embodiments, the compressible layer includes thermally conductive walls that define a compressible cavity. The outer wall of compressible layer is the heat conduction wall to effectively conduct the heat transfer to the heat exchange layer of inside with battery monomer in.

In some embodiments, the compressible layer includes a second compressible tube, the heat exchange layer includes a second heat exchange tube, and the second heat exchange tube is sleeved in the second compressible tube. The heat management component is formed by sleeving the second compressible pipe and the second heat exchange pipe, and is beneficial to forming of the heat management component.

In some embodiments, the thermal management assembly further comprises a current collector comprising a fluid chamber, the fluid chamber being in communication with the heat exchange chamber, the fluid chamber and the heat exchange chamber being sealed from the compressible chamber. The collector can be used for the container of heat transfer medium is stored in the intercommunication, makes the heat transfer medium circulation in the heat transfer chamber, but compressible chamber and heat transfer chamber do not communicate for heat transfer medium can't enter into in the compressible chamber, avoids compressible chamber to take place deformation after receiving the inflation power that the battery monomer released and leads to heat transfer medium to spill over.

In some embodiments, the heat exchange layer and the compressible layer are arranged extending in a second direction, at least one end of the compressible layer in the second direction protruding from the heat exchange layer. The compressible layer protrudes out of the heat exchange layer, so that the flowing liquid cavity of the current collector is sealed and isolated in the compressible cavity, the heat exchange medium cannot enter the compressible cavity, and the heat exchange medium is prevented from overflowing due to deformation of the compressible cavity after the compressible cavity is subjected to the expansion force released by the battery monomer.

In some embodiments, the compressible chamber is provided with an air inlet and an air outlet. The compressible layer can be air-cooled through the air inlet and the air outlet, and the heat exchange efficiency of the heat management component to the battery is further improved by matching with the heat exchange layer.

In a second aspect, the present application provides a battery comprising a battery cell and a thermal management assembly of the above embodiments for regulating the temperature of the battery cell.

In a third aspect, the present application provides an electrical device comprising a battery according to the above embodiments, the battery being configured to provide electrical energy.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the application;

fig. 2 is an exploded view of a battery according to some embodiments of the present application;

fig. 3 is a schematic exploded view of a battery cell according to some embodiments of the present application;

FIG. 4 is a schematic illustration of a thermal management assembly according to some embodiments of the application;

FIG. 5 is a cross-sectional view of a first thermal management assembly according to some embodiments of the application;

FIG. 6 is a cross-sectional view of a second thermal management assembly according to some embodiments of the application;

FIG. 7 is a cross-sectional view of a third thermal management assembly according to some embodiments of the application;

FIG. 8 is a cross-sectional view of a fourth thermal management assembly according to some embodiments of the application;

FIG. 9 is a cross-sectional view of a fifth thermal management assembly according to some embodiments of the application;

FIG. 10 is a schematic view of a first compressible tube according to some embodiments of the application;

FIG. 11 is a schematic view illustrating a structure of a first heat exchange tube according to some embodiments of the present application;

FIG. 12 is a side view of a first heat exchange tube according to some embodiments of the present application;

FIG. 13 is a schematic view of an assembled first compressible tube and first heat exchange tube according to some embodiments of the application;

FIG. 14 is a schematic view of a second heat exchange tube according to some embodiments of the present application;

FIG. 15 is a schematic view of a second compressible tube according to some embodiments of the application;

figure 16 is a side view of a second compressible tube of some embodiments of the application;

FIG. 17 is a schematic illustration of an assembled second compressible tube and second heat exchange tube according to some embodiments of the present application;

FIG. 18 is an exploded view of a thermal management assembly according to some embodiments of the application;

fig. 19 is a schematic structural view of a current collector according to some embodiments of the present application;

FIG. 20 is a schematic illustration of the assembled thermal management assembly and battery cells of some embodiments of the present application;

FIG. 21 is a schematic structural view of a sixth thermal management assembly according to some embodiments of the application.

Reference numerals in the specific embodiments are as follows:

1000-vehicle;

100-cell; 200-a controller; 300-motor;

10-a box body; 11-a first part; 12-a second part;

20-battery cells; 21-end caps; 22-a housing; 23-cell assembly;

30-a thermal management assembly; 31-first direction; 32-third direction; 33-a second direction; 400-a heat exchange layer; 401-a heat exchange cavity; 402-flow channels; 410-a support; 420-a first connection structure; 430-a first heat exchange tube; 431-first mounting cavity; 432—a first abutment surface; 440-a second heat exchange tube; 441-a second abutment surface; 450-a second support; 500-compressible layer; 501-a compressible chamber; 502-an air inlet; 503-an air outlet; 510-a first compressible tube; 511-a first mating surface; 520-a second compressible tube; 521-a second mounting cavity; 522-a second mating surface; 530-a second connection structure; 600-current collector; 601-a fluid chamber; 602-liquid inlet and outlet; 700-pipe.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases 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 of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

The inventor notices that a great deal of heat is generated in the process of charging and discharging the battery monomer, if the heat in the battery cannot be timely discharged, the service life of the battery can be influenced, thermal runaway can be caused, and even safety accidents such as fire explosion and the like can be caused. In the cycling process of the battery, the positive pole piece and the negative pole piece are expanded and contracted, positive pole particles are easy to break along with the cycling, high thickness expansion is formed, the negative pole is continuously repaired along with SEI films, the graphite particles are bulked, and the large thickness expansion is also generated, so that the expansion and deformation of the battery shell are finally caused, and the battery shell is popular in industry.

In order to alleviate the heat dissipation of the battery and improve the swelling deformation of the battery, the applicant has studied to find that it is possible to introduce a thermal management assembly in the battery and to make the thermal management assembly have both heat dissipation capability and also to absorb the swelled portions of the battery cells.

Based on the above considerations, in order to improve the heat dissipation capability of the battery and absorb the portion of the expansion of the battery cell, the inventors have conducted intensive studies to design a thermal management assembly for use in the battery, the heat exchange layer being capable of improving the heat exchange efficiency of the battery and improving the heat dissipation capability of the battery; the elastic modulus of the compressible layer is small, and after the compressible layer is subjected to the expansion force released by the battery cells, the compressible layer can deform along the acting direction of the expansion force of the battery cells, so that the expansion space of the battery cells is ensured, the whole battery module is prevented from generating larger deformation, the compressible layer is favorable for absorbing tolerance when the battery is assembled, and the compressible layer is convenient to install and maintain the compact structure of the battery.

Reference to a battery in accordance with an embodiment of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. Batteries generally include a battery housing for enclosing one or more battery cells, which can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

The battery cells may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, etc., which the embodiment of the application is not limited to. The battery cell may be in a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, which is not limited in this embodiment of the application. The battery cells are generally classified into three types according to the packaging method: cylindrical battery cell, square battery cell and soft package battery cell.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly consists of a positive electrode plate, a negative electrode plate and a separation film. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes out of the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protrudes out of the negative electrode current collector coated with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer is used as a negative electrode lug. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the high current is passed without fusing, the number of positive electrode lugs is multiple and stacked together, and the number of negative electrode lugs is multiple and stacked together. The material of the separator may be Polypropylene (PP) or Polyethylene (PE). In addition, the electrode assembly may be a roll-to-roll structure or a lamination structure, and embodiments of the present application are not limited thereto.

The battery cell further includes a current collecting member for electrically connecting the tab of the battery cell and the electrode terminal to transfer electric energy from the electrode assembly to the electrode terminal, and to the outside of the battery cell through the electrode terminal; the plurality of battery cells are electrically connected through the bus component so as to realize series connection, parallel connection or series-parallel connection of the plurality of battery cells.

The battery also comprises a sampling terminal and a battery management system, wherein the sampling terminal is connected to the converging component and used for collecting information of the battery cells, such as voltage or temperature and the like. The sampling terminal transmits the collected information of the battery monomer to the battery management system, and when the battery management system detects that the information of the battery monomer exceeds a normal range, the output power of the battery can be limited to realize safety protection.

It is to be understood that the electric device to which the battery is applied described in the embodiments of the present application may be in various forms, for example, a cellular phone, a portable device, a notebook computer, an electric car, a ship, a spacecraft, an electric toy, and an electric tool, etc., for example, a spacecraft including an airplane, a rocket, a space plane, and a spacecraft, etc., an electric toy including a stationary or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., an electric tool including a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, and an electric planer.

The battery cell and the battery described in the embodiments of the present application are not limited to the above-described power utilization device, but may be applied to all power utilization devices using the battery cell and the battery, but for simplicity of description, the following embodiments are described by taking an electric automobile as an example.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle according to some embodiments of the application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Referring to fig. 2, fig. 2 is an exploded view of a battery according to some embodiments of the present application. The battery 100 includes a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the case 10. The case 10 is used to provide an accommodating space for the battery cell 20, and the case 10 may have various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 being overlapped with each other, the first portion 11 and the second portion 12 together defining an accommodating space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one end opened, the first portion 11 may be a plate-shaped structure, and the first portion 11 covers the opening side of the second portion 12, so that the first portion 11 and the second portion 12 together define a containing space; the first portion 11 and the second portion 12 may be hollow structures each having an opening at one side, and the opening side of the first portion 11 is engaged with the opening side of the second portion 12. Of course, the case 10 formed by the first portion 11 and the second portion 12 may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like.

In the battery 100, the plurality of battery cells 20 may be connected in series, parallel or a series-parallel connection, wherein the series-parallel connection refers to that the plurality of battery cells 20 are connected in series or parallel. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 20 in series or parallel or series-parallel connection, and a plurality of battery modules are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 20.

Wherein each battery cell 20 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.

Referring to fig. 3, fig. 3 is an exploded view of a battery cell according to some embodiments of the present application. The battery cell 20 refers to the smallest unit constituting the battery. As shown in fig. 3, the battery cell 20 includes an end cap 21, a housing 22, a cell assembly 23, and other functional components.

The end cap 21 refers to a member that is covered at the opening of the case 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 may be adapted to the shape of the housing 22 to fit the housing 22. Optionally, the end cover 21 may be made of a material (such as an aluminum alloy) with a certain hardness and strength, so that the end cover 21 is not easy to deform when being extruded and collided, so that the battery cell 20 can have higher structural strength, and the safety performance can be improved. The end cap 21 may be provided with a functional part such as an electrode terminal or the like. The electrode terminals may be used to electrically connect with the cell assembly 23 for outputting or inputting electric power of the battery cell 20. In some embodiments, the end cap 21 may also be provided with a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application. In some embodiments, insulation may also be provided on the inside of the end cap 21, which may be used to isolate electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. By way of example, the insulation may be plastic, rubber, or the like.

The housing 22 is an assembly for mating with the end cap 21 to form the internal environment of the battery cell 20, where the internal environment may be formed to house the cell assembly 23, electrolyte, and other components. The case 22 and the end cap 21 may be separate members, and an opening may be provided in the case 22, and the interior of the battery cell 20 may be formed by covering the opening with the end cap 21 at the opening. It is also possible to integrate the end cap 21 and the housing 22, but specifically, the end cap 21 and the housing 22 may form a common connection surface before other components are put into the housing, and when it is necessary to encapsulate the inside of the housing 22, the end cap 21 is then put into place with the housing 22. The housing 22 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 may be determined according to the specific shape and size of the cell assembly 23. The material of the housing 22 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application.

The cell assembly 23 is a component in which electrochemical reactions occur in the battery cells 20. One or more battery cell assemblies 23 may be contained within the housing 22. The cell assembly 23 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode plate and the negative electrode plate with active substances form the main body part of the battery cell assembly, and the parts of the positive electrode plate and the negative electrode plate without active substances form the electrode lugs respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or located at two ends of the main body portion respectively. During charge and discharge of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab is connected with the electrode terminal to form a current loop.

Referring now to fig. 4-7, fig. 4 is a schematic structural diagram of a thermal management assembly according to some embodiments of the present application, fig. 5 is a cross-sectional view of a first thermal management assembly according to some embodiments of the present application, fig. 6 is a cross-sectional view of a second thermal management assembly according to some embodiments of the present application, and fig. 7 is a cross-sectional view of a third thermal management assembly according to some embodiments of the present application.

The present application provides a thermal management assembly 30. The thermal management assembly 30 includes a heat exchange layer 400 and a compressible layer 500 in a stacked arrangement. The elastic modulus of the compressible layer 500 is less than the elastic modulus of the heat exchange layer 400.

The heat exchange layer 400 is a layered structure for exchanging heat with the battery cell. When the temperature of the battery cell is higher than that of the heat exchange layer 400, the heat of the battery cell is conducted to the heat exchange layer 400, so that the temperature of the battery cell is reduced; when the temperature of the battery cell is lower than the temperature of the heat exchange, the heat of the heat exchange layer 400 is transferred to the battery cell, so that the temperature of the battery cell increases.

Compressible layer 500 is a layered structure that undergoes greater compression set upon application of a force.

Alternatively, when the compressible layer 500 is subjected to a force in the lamination direction, the compressible layer 500 may compress and deform significantly in the lamination direction.

The modulus of elasticity is the proportional relationship between the stress and strain of a material or structure during elastic deformation. The larger the elastic modulus, the smaller the deformability of the material or structure under the premise of the same stress and in the elastic deformation stage; the smaller the modulus of elasticity, the greater the deformability of the material or structure.

The thermal management assembly 30 is used in a battery, and the heat exchange layer 400 can improve the heat exchange efficiency of the battery and the heat dissipation capacity of the battery; the elastic modulus of the compressible layer 500 is smaller, and after the compressible layer 500 receives the expansion force released by the battery cell, the compressible layer 500 can deform along the acting direction of the expansion force of the battery cell, so that the expansion part of the battery cell is absorbed, the expansion space of the battery cell is ensured, the whole battery module is prevented from generating larger deformation, and the compressible layer 500 is favorable for absorbing tolerance when the battery is assembled, and is convenient for mounting and maintaining the compact structure of the battery.

The number of heat exchange layers 400 may be one or more, and the number of compressible layers 500 may be one or more.

By way of example, as shown in FIG. 5, thermal management assembly 30 includes a heat exchange layer 400 and a compressible layer 500; as shown in fig. 6, the thermal management assembly 30 includes two heat exchange layers 400 and a compressible layer 500, the compressible layer 500 being disposed between the two heat exchange layers 400; as shown in fig. 7, the thermal management assembly 30 includes one heat exchange layer 400 and two compressible layers 500, with the heat exchange layer 400 disposed between the two compressible layers 500.

According to some embodiments of the application, compressible layer 500 optionally includes compressible cavity 501.

Compressible cavity 501 is a cavity that becomes smaller in volume when subjected to a force from compressible layer 500.

Upon receiving the expansion force released from the battery cell, the gas of the compressible chamber 501 is compressed to deform the compressible layer 500 in the direction of the expansion force of the battery cell.

Optionally, the compressible chamber 501 is filled with a phase change material or an elastic material, according to some embodiments of the application.

Phase change materials refer to substances that change state of a substance and can provide latent heat under the condition of constant temperature. The process of transforming physical properties is known as the phase change process, where the phase change material will absorb or release a significant amount of latent heat.

The elastic material is a material with lower elastic modulus, and can be deformed greatly under the action of the expansion force of the battery monomer.

When the compressible cavity 501 is filled with the phase change material, the heat capacity of the battery can be improved, so that the thermal management assembly 30 can realize the function of preserving heat of the battery cell or absorbing heat of the battery cell; when the compressible cavity 501 is filled with an elastic material, the elastic material has better elasticity, and after the elastic material is compressed by the expansion force released by the battery cell, the compressible layer 500 deforms along the direction of the expansion force of the battery cell, and rebound is realized after the expansion force disappears, and in addition, the elastic material can also increase the supporting strength of the compressible layer 500.

Optionally, the resilient material comprises a rubber material.

According to some embodiments of the application, the heat exchange layer 400 optionally comprises a heat exchange cavity 401 for containing a heat exchange medium.

The heat exchange medium is a medium for exchanging heat with the battery monomer, and is generally a liquid with larger specific heat capacity and capable of maintaining fluidity at the working temperature of the battery.

As an example, the heat exchange medium may be water, heat conducting oil, etc.

The heat exchange layer 400 can be used for accommodating a heat exchange medium, and the heat exchange medium can absorb heat emitted by the battery cell or heat the battery cell, so that the heat exchange efficiency of the battery is improved.

Alternatively, the heat exchange chamber 401 may be sealed or open.

Optionally, referring to fig. 8, fig. 8 is a cross-sectional view of a fourth thermal management assembly according to some embodiments of the application. A first support 410 is provided in the heat exchange chamber 401.

The first support 410 is a structure supported in the heat exchange chamber 401 to prevent deformation of the heat exchange chamber 401 by being pressed.

The first support 410 can serve to increase the strength of the heat exchange layer 400, thereby avoiding a large deformation of the heat exchange layer 400 after receiving the expansion force released from the battery cells.

Optionally, according to some embodiments of the application, the modulus of elasticity of the first support 410 is greater than the modulus of elasticity of the compressible layer 500.

Since the elastic modulus of the compressible layer 500 is smaller than that of the first support 410, the compressible layer 500 is more easily deformed, and the heat exchange layer 400 is not substantially deformed when the thermal management assembly 30 is subjected to the expansion force released from the battery cells.

According to some embodiments of the present application, optionally, the heat exchange layer 400 and the compressible layer 500 are arranged stacked along the first direction 31, and the first support 410 is supported in the heat exchange cavity 401 along the first direction 31.

When the thermal management assembly 30 is applied to a battery, the battery cell is generally abutted against the thermal management assembly 30 along the first direction 31, the expansion force released by the subsequent battery cell is also substantially along the first direction 31, the first support 410 supported in the heat exchange cavity 401 along the first direction 31 can greatly increase the elastic modulus of the heat exchange layer 400, so that the compressible layer 500 can be greatly deformed along the first direction 31 after the thermal management assembly 30 receives the expansion force released by the battery cell along the first direction 31, and the heat exchange layer 400 can not be substantially deformed.

Optionally, referring to fig. 6, a compressible layer 500 is disposed in the heat exchange cavity 401, according to some embodiments of the present application.

The heat exchange cavities 401 are arranged at two ends of the thermal management assembly 30 along the stacking direction, so that the heat exchange efficiency of the battery monomers at two ends of the thermal management assembly 30 can be effectively improved, and the temperature of the whole battery is kept at a lower level.

Optionally, referring to fig. 9, fig. 9 is a cross-sectional view of a fifth thermal management assembly according to some embodiments of the application. A first connection structure 420 for securing the compressible layer 500 in the heat exchange cavity 401 is also provided in the heat exchange cavity 401.

The first connection structure 420 is a structure having both ends connected to the inner wall of the heat exchange chamber 401 and the outer wall of the compressible layer 500, respectively.

The first connection structure 420 is capable of securing the compressible layer 500 to prevent a change in the position of the compressible layer 500 relative to the heat exchange cavity 401.

Optionally, at least part of the first connection structure 420 is arranged in the heat exchange cavity 401 in the stacking direction. The first connection structure 420 can fix the compressible layer 500 on the one hand and can serve to increase the strength of the heat exchange layer 400 on the other hand, thereby avoiding a large deformation of the heat exchange layer 400 after receiving the expansion force released from the battery cells.

Optionally, according to some embodiments of the present application, a heat exchanging space is defined between an outer wall of the compressible layer 500 and an inner wall of the heat exchanging cavity 401, and the first connection structure 420 is disposed in the heat exchanging space and divides the heat exchanging space into the plurality of flow channels 402.

The plurality of flow channels 402 facilitate circulation of the heat exchange medium in the heat exchange space, avoiding higher temperatures of the local thermal management assembly 30.

Optionally, a plurality of first connection structures 420 are provided in the heat exchange cavity 401.

Optionally, the elastic modulus of the first connection structure 420 is greater than the elastic modulus of the compressible layer 500.

Referring to fig. 10 to 13, fig. 10 is a schematic structural view of a first compressible tube according to some embodiments of the present application, fig. 11 is a schematic structural view of a first heat exchange tube according to some embodiments of the present application, fig. 12 is a side view of the first heat exchange tube according to some embodiments of the present application, and fig. 13 is a schematic structural view of the first compressible tube and the first heat exchange tube according to some embodiments of the present application after assembly. The compressible layer 500 includes a first compressible tube 510, the heat exchange layer 400 includes a first heat exchange tube 430, and the first compressible tube 510 is sleeved in the first heat exchange tube 430.

The first compressible tube 510 is a tubular structure having a compressible chamber 501 inside and being capable of being deformed by compression.

The first heat exchange tube 430 is a tubular structure having a heat exchange cavity 401 therein, and the heat exchange cavity 401 is provided therein with at least one first connection structure 420, and the end of the at least one first connection structure 420 defines a first installation cavity 431 in which the first compressible tube 510 is provided.

The thermal management assembly 30 of the present application is formed by sleeving the first compressible tube 510 and the first heat exchange tube 430, which is beneficial to the molding of the thermal management assembly 30.

Optionally, after the first compressible tube 510 and the first heat exchange tube 430 are sleeved, an end of at least one first connection structure 420 in the first heat exchange tube 430 abuts against an outer wall of the first compressible tube 510.

Alternatively, the thermal management assembly 30 has a third direction 32 corresponding to the height direction of the battery cells after being mounted in the battery, two first connection structures 420 extending along the third direction 32 are disposed in the first heat exchange tube 430, and the two first connection structures 420 are disposed at two ends of the first heat exchange tube 430 along the third direction 32.

Optionally, the first heat exchange tube 430 has two opposing first abutment surfaces 432 for abutment with the large faces of the battery cells. The first contact surface 432 can increase the contact area between the first heat exchange tube 430 and the battery cell, thereby increasing the heat exchange capability of the thermal management assembly 30 for the battery cell.

Optionally, the first compressible tube 510 has two opposing first mating surfaces 511 for mating with the large faces of the battery cells. The expansion deformation of the battery cell is generally in a direction perpendicular to the large surface, and the first mating surface 511 is capable of being deformed by the expansion force of the battery cell, thereby absorbing the expanded portion of the battery cell.

Optionally, referring to fig. 7, a heat exchange layer 400 is disposed in the compressible chamber 501, according to some embodiments of the application.

The heat exchange cavities 401 are arranged at two ends of the thermal management assembly 30 along the stacking direction, so that the deformation capacity of the thermal management assembly 30 can be effectively improved, and after the thermal management assembly 30 receives the expansion force released by the battery cells at two ends along the stacking direction, the thermal management assembly 30 can generate better deformation so as to absorb the expanded parts released by the battery cells.

Optionally, according to some embodiments of the application, compressible layer 500 includes thermally conductive walls that define compressible cavity 501.

The heat conductive wall is a wall structure of the compressible layer 500 having a good heat conductive effect.

As an example, the material of the heat conducting wall may be heat conducting silica gel, metal, etc.

The outer wall of the compressible layer 500 is a heat conductive wall, so that heat of the battery cell is effectively conducted into the inner heat exchange layer 400 for heat exchange.

Referring to fig. 14 to 17, fig. 14 is a schematic structural view of a second heat exchange tube according to some embodiments of the present application, fig. 15 is a schematic structural view of a second compressible tube according to some embodiments of the present application, fig. 16 is a side view of the second compressible tube according to some embodiments of the present application, and fig. 17 is a schematic structural view of the second compressible tube and the second heat exchange tube after assembly according to some embodiments of the present application. The compressible layer 500 includes a second compressible tube 520, the heat exchange layer 400 includes a second heat exchange tube 440, and the second heat exchange tube 440 is sleeved in the second compressible tube 520.

The second heat exchange tube 440 has a tubular structure having a heat exchange chamber 401 therein.

The second compressible tube 520 is a tubular structure having a compressible chamber 501 therein, and at least one second connection structure 530 is provided in the compressible chamber 501, and the end of the at least one second connection structure 530 defines a second installation chamber 521 in which the second heat exchange tube 440 is provided.

The thermal management assembly 30 of the present application is formed by sleeving the second compressible tube 520 and the second heat exchange tube 440, which is beneficial to the molding of the thermal management assembly 30.

Optionally, after the second compressible tube 520 and the second heat exchange tube 440 are sleeved, the end of at least one second connection structure 530 in the second compressible tube 520 abuts against the outer wall of the second heat exchange tube 440.

Optionally, the thermal management assembly 30 has a third direction 32 corresponding to the height direction of the battery cell after being installed in the battery, two second connection structures 530 extending along the third direction 32 are disposed in the second compressible tube 520, and the two second connection structures 530 are disposed at two ends of the second compressible tube 520 along the third direction 32, respectively.

Optionally, the second compressible tube 520 has two opposing second mating surfaces 522 for abutting against the large faces of the battery cells. The second mating surface 522 can increase the contact area of the second compressible tube 520 with the battery cell, thereby increasing the heat transfer capability of the thermal management assembly 30 to the battery cell. And the expansion deformation of the battery cell is generally along the direction perpendicular to the large surface, the second mating surface 522 can deform under the action of the expansion force of the battery cell, so as to absorb the expansion capability of the battery cell.

Optionally, the second heat exchange tube 440 has two opposing second abutment surfaces 441 for mating with the large faces of the battery cells. The two second abutting surfaces 441 correspond to the two second mating surfaces 522, and absorb heat conducted by the two second mating surfaces 522.

Optionally, a plurality of second supports 450 are provided inside the second heat exchange tube 440.

The inner wall of the heat exchange chamber 401 defines a heat exchange space, and a plurality of second supports 450 are disposed in the heat exchange space and divide the heat exchange space into a plurality of flow passages 402.

Optionally, the modulus of elasticity of the second support 450 is greater than the modulus of elasticity of the compressible layer 500.

Optionally, referring to fig. 4, 18 and 19, fig. 18 is an exploded view of a thermal management assembly according to some embodiments of the present application, and fig. 19 is a schematic view of a current collector according to some embodiments of the present application. The thermal management assembly 30 further includes a current collector 600, the current collector 600 including a fluid chamber 601, the fluid chamber 601 being in communication with the heat exchange chamber 401, the fluid chamber 601 and the heat exchange chamber 401 being sealed from the compressible chamber 501.

The current collector 600 is a member connecting the heat exchange layer 400 and the heat exchange medium storage container.

The fluid chamber 601 is a chamber body connecting the heat exchange chamber 401 and the heat exchange medium storage container in the current collector 600.

The current collector 600 can be used for communicating a container for storing heat exchange media, so that the heat exchange media in the heat exchange cavity 401 are circulated, the compressible cavity 501 is not communicated with the heat exchange cavity 401, so that the heat exchange media cannot enter the compressible cavity 501, and the heat exchange media are prevented from overflowing due to deformation of the compressible cavity 501 after the expansion force released by the battery monomers is received.

Optionally, the current collector 600 further includes a liquid inlet 602, and the liquid inlet 602 is connected to the liquid flow chamber 601.

Alternatively, the thermal management assembly 30 includes a current collector 600, where the current collector 600 is disposed at one end of the heat exchange layer 400, and the heat exchange layer 400 is open at one end, and the fluid cavity 601 is connected to the heat exchange cavity 401 through one end opening.

Optionally, the thermal management assembly 30 includes two current collectors 600, the two current collectors 600 are respectively disposed at two ends of the heat exchange layer 400, two ends of the heat exchange layer 400 are open, and two fluid cavities 601 are respectively communicated with the heat exchange cavity 401 through the openings at the two ends.

Optionally, the thermal management assembly 30 further includes a connector having a hollow structure, and the connector is sealingly connected to the liquid inlet 602 with an opening at one end thereof.

Referring to fig. 4 and 20, fig. 20 is a schematic diagram illustrating an assembled thermal management assembly and battery cells according to some embodiments of the application. When the thermal management assembly 30 is applied to a battery, the thermal management assembly 30 may be disposed between two adjacent battery cells 20, and two opposite surfaces of the thermal management assembly 30 respectively abut against two adjacent large surfaces of the two adjacent battery cells 20; thermal management assembly 30 may also be disposed between the housing and the battery cell 20 adjacent to the housing.

Each thermal management assembly 30 may be connected to a storage heat exchange medium container alone or the fluid inlet 602 of an adjacent thermal management assembly 30 may be connected by a conduit 700.

Optionally, referring to fig. 4 and 21, fig. 21 is a schematic structural view of a sixth thermal management assembly according to some embodiments of the present application. The heat exchange layer 400 and the compressible layer 500 are arranged extending along the second direction 33, and the compressible layer 500 protrudes from the heat exchange layer 400 along at least one end of the second direction 33.

The compressible layer 500 protrudes out of the heat exchange layer 400 to facilitate the sealing isolation of the fluid cavity 601 of the current collector 600 from the compressible cavity 501, so that the heat exchange medium cannot enter the compressible cavity 501, and the heat exchange medium is prevented from overflowing due to deformation of the compressible cavity 501 after the heat exchange medium is subjected to the expansion force released by the battery cell.

Optionally, the compressible layer 500 is disposed in the heat exchange cavity 401, and the current collector 600 includes a through hole penetrating along the second direction 33, and a portion of the compressible layer 500 protruding from the heat exchange layer 400 penetrates through the through hole and is connected with one end of the through hole in a sealing manner, and the other end of the through hole is connected with the outer wall of the heat exchange layer 400 in a sealing manner. The compressible layer 500 protrudes between the outer wall of the portion of the heat exchange layer 400 and the inner wall of the current collector 600 to define an effluent chamber 601.

Optionally, referring to fig. 4, the compressible chamber 501 is provided with an air inlet 502 and an air outlet 503 according to some embodiments of the application.

The compressible layer 500 can be air-cooled through the air inlet 502 and the air outlet 503, and the heat exchange efficiency of the thermal management assembly 30 for the battery is further improved by matching with the heat exchange layer 400.

Referring to fig. 4, 9-13, 18-21, according to some embodiments of the present application, there is provided a thermal management assembly 30 having a first direction 31, a second direction 33, and a third direction 32, which includes a heat exchange layer 400, a compressible layer 500, and a heat exchange layer 400 sequentially stacked along the first direction 31, and two current collectors 600 disposed at both ends of the heat exchange layer 400 along the second direction 33, respectively. The compressible layer 500 includes a first compressible tube 510, the first compressible tube 510 includes a compressible cavity 501, the compressible cavity 501 extends along the second direction 33, and has an air inlet 502 and an air outlet 503 at two ends along the second direction 33, respectively, and the first compressible tube 510 has two first mating surfaces 511 opposite to each other and for mating with the large faces of the battery cells. The heat exchange layer 400 includes a first heat exchange tube 430, the first heat exchange tube 430 includes a heat exchange cavity 401 for accommodating a heat exchange medium, the heat exchange cavity 401 is arranged along the second direction 33 in an extending manner, and has openings at both ends along the second direction 33, a plurality of first connection structures 420 are disposed in the heat exchange cavity 401, the elastic modulus of the first connection structures 420 is greater than that of the first compressible tube 510, two first connection structures 420 are disposed at both ends of the first heat exchange tube 430 along the third direction 32, the outer wall of the second compressible tube 520 and the inner wall of the heat exchange cavity 401 define a heat exchange space, the remaining plurality of first connection structures 420 are disposed in the heat exchange space side by side and at intervals along the first direction 31 and divide the heat exchange space into a plurality of flow channels 402, the ends of the plurality of first connection structures 420 define a first mounting cavity 431 in which the first compressible tube 510 is disposed, and the first heat exchange tube 430 has two first abutting faces 432 opposite and for abutting against a large surface of a battery cell. The first compressible tube 510 is sleeved in the first heat exchange tube 430, the ends of the plurality of first connection structures 420 are abutted to the outer wall of the first compressible tube 510, and two ends of the first compressible tube 510 along the second direction 33 are protruded out of the heat exchange layer 400. Each current collector 600 comprises a fluid cavity 601, two fluid inlet and outlet ports 602 and a through hole penetrating along the second direction 33, wherein the two fluid inlet and outlet ports 602 are both communicated with the fluid cavity 601, the fluid cavity 601 is communicated with the heat exchange cavity 401, the part of the compressible layer 500 protruding from the heat exchange layer 400 penetrates through the through hole and is in sealing connection with one end of the through hole, and the other end of the through hole is in sealing connection with the outer wall of the heat exchange layer 400. When the thermal management assembly 30 of the present application is applied to a battery, the thermal management assembly 30 may be disposed between two adjacent battery cells 20, and two opposite surfaces of the thermal management assembly 30 respectively abut against two adjacent large surfaces of the two adjacent battery cells 20; the thermal management assembly 30 may also be disposed between the housing and the battery cell 20 adjacent to the housing, with the fluid inlet 602 and outlet 602 of adjacent thermal management assemblies 30 being connected by a conduit 700.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A thermal management assembly, the thermal management assembly comprising:

a heat exchange layer and a compressible layer arranged in a stack;

the compressible layer has a modulus of elasticity that is less than the modulus of elasticity of the heat exchange layer.

2. The thermal management assembly of claim 1, wherein the compressible layer comprises a compressible cavity.

3. The thermal management assembly of claim 2, wherein the compressible cavity is filled with a phase change material or an elastic material.

4. The thermal management assembly of claim 2, wherein the heat exchange layer includes a heat exchange cavity for containing a heat exchange medium.

5. The thermal management assembly of claim 4, wherein a first support is disposed in the heat exchange cavity.

6. The thermal management assembly of claim 5, wherein the first support has a modulus of elasticity that is greater than a modulus of elasticity of the compressible layer.

7. The thermal management assembly of claim 5, wherein the heat exchange layer and the compressible layer are arranged in a stack along a first direction, the first support being supported in the heat exchange cavity along the first direction.

8. The thermal management assembly of claim 4, wherein the compressible layer is disposed in the heat exchange cavity.

9. The thermal management assembly of claim 8, wherein a first connection structure is further provided in the heat exchange cavity for securing the compressible layer in the heat exchange cavity.

10. The thermal management assembly of claim 9, wherein a heat exchange space is defined between an outer wall of the compressible layer and an inner wall of the heat exchange cavity, the first connection structure being disposed in the heat exchange space and dividing the heat exchange space into a plurality of flow channels.

11. The thermal management assembly of any one of claims 1-10, wherein the compressible layer comprises a first compressible tube, the heat exchange layer comprises a first heat exchange tube, and the first compressible tube is sleeved in the first heat exchange tube.

12. The thermal management assembly of any one of claims 2-10, wherein the heat exchange layer is disposed in the compressible cavity.

13. The thermal management assembly of claim 12, wherein the compressible layer includes thermally conductive walls defining the compressible cavity.

14. The thermal management assembly of claim 12, wherein the compressible layer comprises a second compressible tube, the heat exchange layer comprises a second heat exchange tube, and the second heat exchange tube is sleeved in the second compressible tube.

15. The thermal management assembly of any one of claims 4-10, further comprising a current collector comprising a fluid chamber in communication with the heat exchange chamber, both the fluid chamber and the heat exchange chamber being hermetically isolated from the compressible chamber.

16. The thermal management assembly of claim 15, wherein the heat exchange layer and the compressible layer are disposed in an extending manner along a second direction, at least one end of the compressible layer along the second direction protruding from the heat exchange layer.

17. A thermal management assembly according to any one of claims 2 to 10, wherein the compressible chamber is provided with an air inlet and an air outlet.

18. A battery comprising a battery cell and the thermal management assembly of any one of claims 1-17 for regulating the temperature of the battery cell.

19. An electrical device comprising the battery of claim 18 for providing electrical energy.