Battery device, heat management assembly, electric equipment and energy storage equipment

Abstract

The utility model provides a battery device, a heat management assembly, electric equipment and energy storage equipment, and belongs to the technical field of batteries. The battery device includes a battery cell and a thermal management assembly. Each battery monomer comprises two opposite first side surfaces, two opposite second side surfaces and a bottom surface connected with the two first side surfaces and the two second side surfaces; the heat management assembly comprises a first heat dissipation piece, a second heat dissipation piece and a heat exchange plate, and the first heat dissipation piece is attached to the first side face and is in heat conduction connection with the single batteries. The second heat dissipation piece is attached to the second side face and / or the bottom face, and the second heat dissipation piece is in heat conduction connection with the first heat dissipation piece and the battery single bodies. The heat exchange plate is connected with the surface, parallel to the first side face, of the second heat dissipation piece, a heat exchange channel allowing heat exchange media to circulate is formed in the heat exchange plate, and the heat exchange plate is used for conducting heat exchange with the second heat dissipation piece. According to the invention, the uniformity and the stability of heat transfer are improved, so that the temperature of the battery monomers can be effectively and reliably controlled within a proper range.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device, a thermal management component, an electrical device and an energy storage device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] Temperature is an important factor affecting battery reliability. Too high or too low a temperature will lead to a decrease in battery reliability. Therefore, the battery temperature needs to be effectively and reliably controlled within an appropriate range so that the battery can work reliably. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems in the background technology. To this end, one purpose of the present application is to provide a battery device, a thermal management component, an electrical device and an energy storage device to improve the effectiveness and reliability of battery temperature control, thereby improving the reliability of the battery.

[0005] An embodiment of the first aspect of the present application provides a battery device, including a battery cell and a thermal management component. The battery cell includes two opposite first side surfaces, two opposite second side surfaces, and a bottom surface connecting the two first side surfaces and the second side surfaces. The thermal management component includes a first heat sink, a second heat sink, and a heat exchange plate, wherein the first heat sink is bonded to the first side surface and is thermally connected to the battery cell. The second heat sink is bonded to the second side surface and / or the bottom surface, and the second heat sink is thermally connected to the first heat sink and the battery cell, respectively. The heat exchange plate is connected to the surface of the second heat sink parallel to the first side surface, and a heat exchange channel for the circulation of a heat exchange medium is provided inside the heat exchange plate, and the heat exchange plate is used to perform heat exchange with the second heat sink.

[0006] In the technical solution of the embodiment of the present application, the heat between the heat exchange plate and the battery cell is indirectly transferred through the first heat sink and the second heat sink, which improves the uniformity and stability of the heat transfer. The first heat sink and the second heat sink are attached to the surfaces of multiple parts of the battery cell, so that the heat can be transferred from multiple surfaces of the battery cell, that is, the heat is transferred at multiple parts on the battery cell, which further improves the sufficiency and uniformity of the heat transfer between the first heat sink and the second heat sink and the battery cell, so that the battery cell can be fully and evenly heated or cooled, and the temperature of the battery cell can be effectively and reliably controlled within a suitable range, thereby improving the reliability of the battery device.

[0007] In some embodiments, the projection of the first side surface along the first direction completely falls within the projection of the surface of the first heat sink attached to the first side surface along the first direction. The first direction is perpendicular to the first side surface. This allows the surface of the first heat sink attached to the first side surface to completely cover the first side surface, thereby achieving sufficient heat transfer and improving the uniformity of heat transfer.

[0008] In some embodiments, the first heat sink is configured as a heat conducting plate, the second heat sink is configured as a heat pipe, and the second heat sink is attached to the bottom surface, so that heat can be transferred through the first side surface and the bottom surface, thereby improving the sufficiency and uniformity of heat transfer between the heat conducting plate and the heat pipe and the battery cell.

[0009] In some embodiments, the projection of the bottom surface along the vertical direction completely falls within the projection of the surface of the second heat sink attached to the bottom surface along the vertical direction. The vertical direction is perpendicular to the bottom surface. This allows the surface of the second heat sink attached to the bottom surface to completely cover the bottom surface, thereby achieving sufficient heat transfer and improving the uniformity of heat transfer.

[0010] In some embodiments, the first heat sink is configured as a heat conducting plate, the second heat sink is configured as a heat pipe, and the second heat sink is attached to the second side surface, so that heat can be transferred through the first side surface and the second side surface, thereby improving the sufficiency and uniformity of heat transfer between the heat conducting plate and the heat pipe and the battery cell.

[0011] In some embodiments, the battery device further comprises a box body, and the part of the box body opposite to the bottom surface, the first heat sink and the second heat sink together define a first accommodation cavity for accommodating the battery cell, so as to achieve heat transfer and limit the battery cell.

[0012] In some embodiments, the projection of the second side surface along the second direction completely falls within the projection of the surface of the second heat sink attached to the second side surface along the second direction. The second direction is perpendicular to the second side surface. This allows the surface of the second heat sink attached to the second side surface to completely cover the second side surface, thereby achieving sufficient heat transfer and improving the uniformity of heat transfer.

[0013] In some embodiments, the first heat sink and the second heat sink are both configured as heat pipes, and the second heat sink includes a first heat sink body and a second heat sink body, the first heat sink body is attached to the second side surface, and the second heat sink body is attached to the bottom surface, so that heat can be transferred through the first side surface, the second side surface and the bottom surface, thereby improving the sufficiency and uniformity of heat transfer between the heat pipe and the battery cell.

[0014] In some embodiments, at least two of the first heat sink, the first heat sink body, and the second heat sink body are integrated structures, and the first heat sink, the first heat sink body, and the second heat sink body together define a second accommodation cavity for accommodating a battery cell, thereby improving heat transfer efficiency and limiting the position of the battery cell.

[0015] In some embodiments, the heat exchange plate is provided with a mounting groove in a direction perpendicular to the first side surface, and the end of the second heat sink is plugged into the mounting groove, so that reliable heat exchange can be performed between the second heat sink and the heat exchange medium in the heat exchange plate.

[0016] In some embodiments, there are multiple battery cells, and the multiple battery cells are arranged in an array along a first direction and a second direction perpendicular to the first direction. The first direction is perpendicular to the first side surface, and the second direction is perpendicular to the second side surface. A first heat sink is disposed between two adjacent battery cells along the first direction. The number of first heat sinks is reduced, thereby reducing the space occupied by the first heat sinks.

[0017] In some embodiments, there are two heat exchange plates, which are respectively located at two opposite ends of the second heat sink, thereby improving the efficiency and uniformity of heat transfer between the heat exchange plates and the second heat sink.

[0018] The embodiment of the second aspect of the present application provides a thermal management component, which includes a first heat sink, a second heat sink and a heat exchange plate. The first heat sink is used to fit with the first side of the battery cell and is used to be thermally connected to the battery cell. The second heat sink is used to fit with the second side and / or bottom of the battery cell, and the second heat sink is thermally connected to the first heat sink and the battery cell respectively. The heat exchange plate is connected to the surface of the second heat sink parallel to the first side, and is used to exchange heat with the second heat sink.

[0019] An embodiment of the third aspect of the present application provides an electrical device, which includes the battery device in the above embodiment, and the battery device is used to provide electrical energy.

[0020] An embodiment of a fourth aspect of the present application provides an energy storage device, which includes the battery device in the above embodiment.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0023] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0024] Figure 2 This is one of the exploded structural schematic diagrams of the battery device of some embodiments of the present application;

[0025] Figure 3 This is a second schematic diagram of the exploded structure of a battery device according to some embodiments of the present application;

[0026] Figure 4 This is a third schematic diagram of the exploded structure of a battery device according to some embodiments of the present application;

[0027] Figure 5 This is a fourth schematic diagram of the exploded structure of the battery device according to some embodiments of the present application.

[0028] Description of reference numerals:

[0029] 1000. Vehicles;

[0030] 100, battery device; 200, controller; 300, motor;

[0031] 10. Box body; 11. First part; 12. Second part;

[0032] 20. Battery cell; 21. First side surface; 22. Second side surface;

[0033] 30. Thermal management components;

[0034] 31. A first heat dissipation element;

[0035] 32. second heat dissipation element; 321. first heat dissipation body; 322. second heat dissipation body;

[0036] 33. Heat exchange plate;

[0037] F1, first direction; F2, second direction; F3, vertical direction; V1, first accommodating cavity; V2, second accommodating cavity. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] At present, judging from the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of battery application fields, its market demand is also constantly expanding.

[0047] Temperature is an important factor affecting battery reliability. When the temperature is too high, it may cause problems such as battery short circuit or expansion, and accelerate battery aging. When the temperature is too low, the available capacity of the battery will decay, and when charging the battery at too low a temperature, lithium deposition may occur, leading to a short circuit. That is, too high or too low a temperature will affect the reliability of the battery to varying degrees. Therefore, effective and reliable temperature control is of great significance to improving battery reliability.

[0048] Based on the above considerations, the present application provides a battery device, a thermal management component, an electrical device and an energy storage device, wherein the battery device includes a battery cell and a thermal management component. The battery cell includes two opposite first side surfaces, two opposite second side surfaces and a bottom surface connecting the two first side surfaces and the second side surfaces. The thermal management component includes a first heat sink, a second heat sink and a heat exchange plate, wherein the first heat sink is attached to the first side surface and is thermally connected to the battery cell. The second heat sink is attached to the second side surface and / or the bottom surface, and the second heat sink is thermally connected to the first heat sink and the battery cell, respectively. The heat exchange plate is connected to the surface of the second heat sink parallel to the first side surface, and a heat exchange channel for the circulation of a heat exchange medium is provided inside the heat exchange plate, and the heat exchange plate is used to perform heat exchange with the second heat sink.

[0049] The heat transfer between the heat exchange plate and the battery cell is achieved indirectly through the first heat sink and the second heat sink, which improves the uniformity and stability of the heat transfer. The first heat sink and the second heat sink are attached to the surfaces of multiple parts of the battery cell, so that the heat can be transferred from multiple surfaces of the battery cell, that is, the heat is transferred at multiple parts on the battery cell, which further improves the sufficiency and uniformity of the heat transfer between the first heat sink and the second heat sink and the battery cell, so that the battery cell can be fully and evenly heated or cooled, and the temperature of the battery cell can be effectively and reliably controlled within a suitable range, thereby improving the reliability of the battery device.

[0050] The battery device disclosed in the embodiment of the present application can be used in, but not limited to, electrical equipment such as vehicles, ships or aircraft, and can also be used in energy storage equipment, which is helpful to improve the reliability of the battery device.

[0051] The embodiment of the present application provides an electric device using a battery device as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0052] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0053] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. 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. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0054] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve 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.

[0055] Please refer to Figure 2 , Figure 2 One of the schematic diagrams of the exploded structure of the battery device provided in some embodiments of the present application. The battery device 100 includes a box 10 and a battery cell 20, and the battery cell 20 is contained in the box 10. Among them, the box 10 is used to provide a storage space for the battery cell 20, and the box 10 can adopt a variety of structures. In some embodiments, 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 storage space for accommodating the battery cell 20. The second part 12 can be a hollow structure with one end open, the first part 11 can be a plate-like structure, and 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 storage space; the first part 11 and the second part 12 can also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 can be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0056] In the battery device 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery device 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0057] Combination Figures 3 to 5 As shown, Figure 3 This is a second schematic diagram of the exploded structure of a battery device according to some embodiments of the present application; Figure 4 This is a third schematic diagram of the exploded structure of a battery device according to some embodiments of the present application; Figure 5 This is a fourth schematic diagram of the exploded structure of the battery device according to some embodiments of the present application.

[0058] The embodiment of the present application provides a battery device 100, including a battery cell 20 and a thermal management component 30. The battery cell 20 includes two opposite first side surfaces 21, two opposite second side surfaces 22, and a bottom surface connecting the two first side surfaces 21 and the second side surfaces 22. The thermal management component 30 includes a first heat sink 31, a second heat sink 32, and a heat exchange plate 33. The first heat sink 31 is attached to the first side surface 21 and is thermally connected to the battery cell 20. The second heat sink 32 is attached to the second side surface 22 and / or the bottom surface, and the second heat sink 32 is thermally connected to the first heat sink 31 and the battery cell 20, respectively. The heat exchange plate 33 is connected to the surface of the second heat sink 32 parallel to the first side surface 21, and a heat exchange channel for the circulation of a heat exchange medium is provided inside the heat exchange plate 33. The heat exchange plate 33 is used to perform heat exchange with the second heat sink 32.

[0059] The battery cell 20 is the smallest unit constituting the battery device 100. The battery cell 20 includes an end cap, a shell and an electrode assembly. The end cap is covered at the opening of the shell to isolate the internal environment of the battery cell 20 from the external environment. The electrode assembly is arranged in the shell and is a component in the battery cell 20 where electrochemical reactions occur. The first side surface 21, the second side surface 22 and the bottom surface are the outer surfaces of the shell. The bottom surface is the surface opposite to the end cap. The first side surface 21 and the second side surface 22 are adjacent and located between the end cap and the bottom surface. The battery cell 20 is rectangular or approximately rectangular as a whole. In some embodiments, the edges of the battery cell 20 include length, width and height. The first side surface 21 is a surface defined by the length and height, the second side surface 22 is a surface defined by the width and height, and the bottom surface is a surface defined by the length and width. The area of ​​the first side surface 21 is greater than the area of ​​the second side surface 22. The first side surface 21 can be the large surface of the battery cell 20.

[0060] In some embodiments, the end cap may be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value, and may also be provided with functional components such as electrode terminals electrically connected to the electrode assembly.

[0061] The thermal management component 30 is a component in the battery device 100 that controls the temperature of the battery cell 20. For example, the thermal management component 30 heats the battery cell 20 when the temperature of the battery cell 20 is low, and cools the battery cell 20 when the temperature of the battery cell 20 is high, so that the temperature of the battery cell 20 can be maintained within an appropriate temperature range, thereby improving the reliability of the operation of the battery device 100.

[0062] In the thermal management component 30 , the first heat sink 31 is a component that can transfer heat with the battery cell 20 . For example, the heat of the battery cell 20 is transferred from the first side surface 21 to the first heat sink 31 to achieve cooling of the battery cell 20 , or external heat is transferred from the first side surface 21 to the battery cell 20 through the first heat sink 31 to achieve heating of the battery cell 20 .

[0063] The second heat sink 32 is a component capable of transferring heat with the battery cell 20 and the first heat sink 31. The second heat sink 32 is attached to the second side surface 22 and / or the bottom surface. It is understandable that the second heat sink 32 can be attached only to the second side surface 22, or only to the bottom surface, or to both the second side surface 22 and the bottom surface. A portion of the heat of the battery cell 20 is transferred to the second heat sink 32 through the first heat sink 31, and another portion of the heat is directly transferred to the second heat sink 32 to achieve cooling of the battery cell 20. Alternatively, external heat is transferred to the second heat sink 32, and a portion of the heat transferred to the second heat sink 32 is directly transferred to the battery cell 20, and another portion of the heat is transferred to the battery cell 20 through the first heat sink 31 to achieve heating of the battery cell 20.

[0064] The heat exchange plate 33 is a component that uses a heat exchange medium to exchange heat with the second heat sink 32. The heat exchange medium flows in the heat exchange channel, which can take away the heat transferred from the battery cell 20 and the first heat sink 31 to the second heat sink 32 to achieve cooling of the battery cell 20, and can also transfer the heat of the heat exchange medium to the first heat sink 31 and the battery cell 20 through the second heat sink 32 to achieve heating of the battery cell 20. The heat exchange plate 33 is connected to the surface of the second heat sink 32 parallel to the first side surface 21, and the battery cell 20 and the heat exchange plate 33 are not in direct contact. When heat is transferred, heat is indirectly transferred with the help of the first heat sink 31 and the second heat sink 32, which reduces the uneven heat transfer caused by the large temperature difference between the battery cell 20 and the heat exchange plate 33, and reduces the problem of affecting the stability of the battery cell 20 and the heat exchange plate 33. In some examples, the heat exchange medium can be a liquid, and the liquid can be water.

[0065] In some embodiments, the first heat sink 31 and the second heat sink 32 can be configured as a heat conducting plate or a heat pipe. The heat conducting plate is made of a heat conducting material with good thermal conductivity. The heat pipe is an element that achieves heat transfer by phase change of its internal working medium.

[0066] The heat transfer between the heat exchange plate 33 and the battery cell 20 is indirectly achieved through the first heat sink 31 and the second heat sink 32, which improves the uniformity and stability of the heat transfer. The first heat sink 31 and the second heat sink 32 are attached to the surfaces of multiple parts of the battery cell 20, so that the heat can be transferred from multiple surfaces of the battery cell 20, that is, the heat is transferred at multiple parts on the battery cell 20, which further improves the sufficiency and uniformity of the heat transfer between the first heat sink 31 and the second heat sink 32 and the battery cell 20, so that the battery cell 20 can be fully and evenly heated or cooled, and the temperature of the battery cell 20 can be effectively and reliably controlled within a suitable range, thereby improving the reliability of the battery device 100.

[0067] Combination Figures 3 to 5 As shown, according to some embodiments of the present application, the projection of the first side surface 21 along the first direction F1 completely falls within the projection of the surface of the first heat sink 31 attached to the first side surface 21 along the first direction F1. The first direction F1 is perpendicular to the first side surface 21.

[0068] The projection along the first direction F1 refers to the projection on the plane perpendicular to the first direction F1. The projection of the first side surface 21 along the first direction F1 completely falls within the projection of the surface where the first heat sink 31 and the first side surface 21 are attached along the first direction F1. It can be understood that the surface where the first heat sink 31 and the first side surface 21 are attached can completely cover the first side surface 21. When the battery cell 20 is cooled, the heat at each position of the first side surface 21 can be fully transferred to the first heat sink 31. When the battery cell 20 is heated, the heat of the first heat sink 31 can be fully transferred to each position on the first side surface 21, reducing the temperature difference between different positions on the first side surface 21. As a result, the uniformity of heat transfer is improved while achieving full heat transfer.

[0069] By setting the surface where the first heat sink 31 and the first side surface 21 are in contact to completely cover the first side surface 21, sufficient heat transfer is achieved while improving the uniformity of heat transfer, making the temperature of the battery cell 20 more uniform and improving the reliability of temperature control of the battery cell 20.

[0070] like Figure 3 As shown, according to some embodiments of the present application, the first heat sink 31 is configured as a heat conducting plate, the second heat sink 32 is configured as a heat pipe, and the second heat sink 32 is attached to the bottom surface.

[0071] The heat conducting plate is made of a heat conducting material with good heat conducting performance, for example, the heat conducting plate can be a metal plate. The plate-shaped first heat sink 31 is relatively thin, which reduces the space occupied by the first heat sink 31 .

[0072] A heat pipe is an element that achieves heat transfer by phase change of its internal working medium. In some examples, one end of the heat pipe can be extended into the heat exchange plate 33 so that one end of the heat pipe contacts the heat exchange medium in the heat exchange channel to achieve heat exchange between the heat pipe and the heat exchange medium.

[0073] When cooling the battery cell 20, part of the heat of the battery cell 20 is transferred to the heat pipe through the first side surface 21 and the heat conducting plate in turn, and the other part of the heat is transferred to the heat pipe from the bottom surface. The heat exchange medium of the heat exchange plate 33 takes away the heat transferred to the heat pipe to reduce the temperature of the battery cell 20.

[0074] When heating the battery cell 20, the heat exchange medium of the heat exchange plate 33 transfers heat to the heat pipe. Part of the heat transferred to the heat pipe is directly transferred to the battery cell 20 through the bottom surface, and the other part of the heat is transferred to the battery cell 20 through the heat conductive plate and the first side surface 21 in turn to increase the temperature of the battery cell 20.

[0075] In some embodiments, the heat pipe can be set as a flat plate heat pipe. The flat plate heat pipe is a heat pipe in the shape of a flat plate. Its structure is conducive to fitting with the bottom surface and has good temperature uniformity. It can better diffuse heat and improve the efficiency of heat transfer.

[0076] By providing a heat conducting plate bonded to the first side surface 21 and a heat pipe bonded to the bottom surface, heat can be transferred through the first side surface 21 and the bottom surface, that is, heat is transferred at multiple locations on the battery cell 20, thereby improving the sufficiency and uniformity of heat transfer between the heat conducting plate and the heat pipe and the battery cell.

[0077] like Figure 3 As shown, according to some embodiments of the present application, the projection of the bottom surface along the vertical direction F3 completely falls within the projection of the surface of the second heat sink 32 abutting against the bottom surface along the vertical direction F3. The vertical direction F3 is perpendicular to the bottom surface.

[0078] The projection along the vertical direction F3 refers to the projection on the plane perpendicular to the vertical direction F3. The projection of the bottom surface along the vertical direction F3 completely falls within the projection of the surface of the second heat sink 32 abutting against the bottom surface along the vertical direction F3. It can be understood that the surface of the second heat sink 32 abutting against the bottom surface can completely cover the bottom surface. When the battery cell 20 is cooled, the heat at each position of the bottom surface can be fully transferred to the second heat sink 32. When the battery cell 20 is heated, the heat of the second heat sink 32 can be fully transferred to each position on the bottom surface, reducing the temperature difference at different positions on the bottom surface. As a result, the uniformity of heat transfer is improved while achieving full heat transfer.

[0079] By setting the surface of the second heat sink 32 in contact with the bottom surface to be able to completely cover the bottom surface, sufficient heat transfer is achieved while improving the uniformity of heat transfer, making the temperature of the battery cell 20 more uniform and improving the reliability of temperature control of the battery cell 20.

[0080] like Figure 4 As shown, according to some embodiments of the present application, the first heat sink 31 is configured as a heat conducting plate, the second heat sink 32 is configured as a heat pipe, and the second heat sink 32 is in contact with the second side surface 22 .

[0081] The heat conducting plate is made of a heat conducting material with good heat conducting performance, for example, the heat conducting plate can be a metal plate. The plate-shaped first heat sink 31 is relatively thin, which reduces the space occupied by the first heat sink 31 .

[0082] A heat pipe is an element that achieves heat transfer by phase change of its internal working medium. In some examples, one end of the heat pipe can be extended into the heat exchange plate 33 so that one end of the heat pipe contacts the heat exchange medium in the heat exchange channel to achieve heat exchange between the heat pipe and the heat exchange medium.

[0083] When cooling the battery cell 20, part of the heat of the battery cell 20 is transferred to the heat pipe through the first side 21 and the heat conducting plate in turn, and the other part of the heat is transferred to the heat pipe through the second side 22. The heat exchange medium of the heat exchange plate 33 takes away the heat transferred to the heat pipe to reduce the temperature of the battery cell 20.

[0084] When heating the battery cell 20, the heat exchange medium of the heat exchange plate 33 transfers heat to the heat pipe. Part of the heat transferred to the heat pipe is directly transferred to the battery cell through the second side 22, and the other part of the heat is transferred to the battery cell 20 through the heat conductive plate and the first side 21 in turn to increase the temperature of the battery cell 20.

[0085] In some embodiments, the heat pipe can be configured as a flat plate heat pipe, which is a heat pipe in the shape of a flat plate, and its structure is conducive to fitting with the second side surface 22, and has good temperature uniformity, can better diffuse heat, and improve the efficiency of heat transfer.

[0086] By providing a heat conductive plate bonded to the first side surface 21 and a heat pipe bonded to the second side surface 22, heat can be transferred through the first side surface 21 and the second side surface 22, that is, heat is transferred at multiple locations on the battery cell 20, thereby improving the sufficiency and uniformity of heat transfer between the heat conductive plate and the heat pipe and the battery cell 20.

[0087] like Figure 4As shown, according to some embodiments of the present application, the battery device further includes a box body 10 , and the portion of the box body 10 opposite to the bottom surface, the first heat sink 31 and the second heat sink 32 together define a first accommodation cavity V1 for accommodating the battery cell 20 .

[0088] The portion of the box body 10 opposite to the bottom surface forms the bottom of the first accommodating cavity V1, which is used to support the battery cell 20 along the vertical direction F3. The first heat sink 31 and the second heat sink 32 form the side walls of the first accommodating cavity V1. The first heat sink 31 and the second heat sink 32 can not only transfer heat with the battery cell 20, but also limit the battery cell 20 along the horizontal direction perpendicular to the vertical direction F3, so as to reduce the movement of the battery cell 20 in the box body 10 and improve the accuracy of the position of the battery cell 20 in the box body 10.

[0089] By arranging the battery cell 20 in the first accommodation cavity V1 defined by the box body 10 , the first heat sink 31 and the second heat sink 32 , the battery cell 20 can be limited in position while achieving heat transfer.

[0090] like Figure 4 As shown, according to some embodiments of the present application, the projection of the second side surface 22 along the second direction F2 completely falls within the projection of the surface of the second heat sink 32 attached to the second side surface 22 along the second direction F2. The second direction F2 is perpendicular to the second side surface 22.

[0091] The projection along the second direction F2 refers to the projection on the plane perpendicular to the second direction F2. The projection of the second side surface 22 along the second direction F2 completely falls within the projection of the surface where the second heat sink 32 and the second side surface 22 are attached along the second direction F2. It can be understood that the surface where the second heat sink 32 and the second side surface 22 are attached can completely cover the second side surface 22. When the battery cell 20 is cooled, the heat at each position of the second side surface 22 can be fully transferred to the second heat sink 32. When the battery cell 20 is heated, the heat of the second heat sink 32 can be fully transferred to each position on the second side surface 22, reducing the temperature difference between different positions on the second side surface 22. As a result, the uniformity of heat transfer is improved while achieving full heat transfer.

[0092] By setting the surface where the second heat sink 32 and the second side surface 22 are in contact to completely cover the second side surface 22, sufficient heat transfer is achieved while improving the uniformity of heat transfer, making the temperature of the battery cell 20 more uniform and improving the reliability of temperature control of the battery cell 20.

[0093] like Figure 5As shown, according to some embodiments of the present application, the first heat sink 31 and the second heat sink 32 are both configured as heat pipes, and the second heat sink 32 includes a first heat sink body 321 and a second heat sink body 322, the first heat sink body 321 is bonded to the second side surface 22, and the second heat sink body 322 is bonded to the bottom surface.

[0094] A heat pipe is an element that achieves heat transfer by phase change of its internal working medium. In some examples, one end of the heat pipe can be extended into the heat exchange plate 33 so that one end of the heat pipe contacts the heat exchange medium in the heat exchange channel to achieve heat exchange between the heat pipe and the heat exchange medium.

[0095] When cooling the battery cell 20 , part of the heat of the battery cell 20 is transferred to the heat pipe through the first side surface 21 , the second side surface 22 and the bottom surface, and the heat exchange medium of the heat exchange plate 33 takes away the heat transferred to the heat pipe to reduce the temperature of the battery cell 20 .

[0096] When heating the battery cell 20 , the heat exchange medium of the heat exchange plate 33 transfers heat to the heat pipe, and the heat transferred to the heat pipe is transferred to the battery cell 20 through the first side surface 21 , the second side surface 22 and the bottom surface to increase the temperature of the battery cell 20 .

[0097] In some embodiments, the heat pipe can be set as a flat heat pipe, that is, the first heat sink 31, the first heat sink body 321 and the second heat sink body 322 are all flat heat pipes. The flat heat pipe is a heat pipe in the shape of a flat plate, and its structure is conducive to fitting with the first side surface 21, the second side surface 22 and the bottom surface, and has good temperature uniformity, which can better diffuse the heat and improve the efficiency of heat transfer.

[0098] By providing heat pipes on the first side surface 21 , the second side surface 22 and the bottom surface, heat can be transferred through the first side surface 21 , the second side surface 22 and the bottom surface, that is, heat is transferred at multiple locations on the battery cell 20 , thereby improving the sufficiency and uniformity of heat transfer between the heat pipes and the battery cell 20 .

[0099] According to some embodiments of the present application, at least two of the first heat sink 31, the first heat sink body 321 and the second heat sink body 322 are an integrated structure, and the first heat sink 31, the first heat sink body 321 and the second heat sink body 322 jointly define a second accommodating cavity V2 for accommodating the battery cell 20.

[0100] At least two of the first heat sink 31, the first heat sink body 321 and the second heat sink body 322 are an integrated structure. It can be understood that the first heat sink 31 and the first heat sink body 321 are an integrated structure, or the first heat sink 31 and the second heat sink body 322 are an integrated structure, or the first heat sink body 321 and the second heat sink body 322 are an integrated structure, or the first heat sink 31, the first heat sink body 321 and the second heat sink body 322 are an integrated structure.

[0101] The second heat dissipation body 322 forms the bottom of the second accommodating cavity V2, which is used to support the battery cell 20 along the vertical direction F3. The first heat dissipation member 31 and the first heat dissipation body 321 form the side wall of the second accommodating cavity V2. The first heat dissipation member 31 and the first heat dissipation body 321 can not only transfer heat with the battery cell 20, but also limit the battery cell 20 along the horizontal direction perpendicular to the vertical direction F3, so as to reduce the movement of the battery cell 20 in the box body 10, thereby improving the accuracy of the position of the battery cell 20 in the box body 10.

[0102] By providing at least two of the first heat sink 31, the first heat sink body 321, and the second heat sink body 322 as an integrated structure, the efficiency of heat transfer between the first heat sink 31 and the second heat sink 32 can be improved. In addition, by arranging the battery cell 20 in the second accommodation cavity V2 defined by the first heat sink 31, the first heat sink body 321, and the second heat sink body 322, the battery cell 20 can be limited while achieving heat transfer.

[0103] According to some embodiments of the present application, the heat exchange plate 33 is provided with a mounting groove along a direction perpendicular to the first side surface 21 , and an end portion of the second heat sink 32 is plugged into the mounting groove.

[0104] The end of the second heat sink 32 is plugged into the mounting groove, and the end of the second heat sink 32 can extend into the heat exchange plate 33, so that one end of the second heat sink 32 can fully contact the heat exchange medium in the heat exchange channel, thereby enabling reliable heat exchange between the second heat sink 32 and the heat exchange medium.

[0105] In some embodiments, the second heat sink 32 is configured as a heat pipe, and the end of the heat pipe extends into the heat exchange plate 33 through the mounting groove and contacts the heat exchange medium in the heat exchange channel, thereby achieving heat exchange between the heat pipe and the heat exchange medium.

[0106] By plugging the second heat sink 32 into the mounting groove, reliable heat exchange can be performed between the second heat sink 32 and the heat exchange medium in the heat exchange plate 33 .

[0107] Combination Figures 3 to 5As shown, according to some embodiments of the present application, there are multiple battery cells 20, and the multiple battery cells 20 are arranged in an array along a first direction F1 and a second direction F2 perpendicular to the first direction F1. The first direction F1 is perpendicular to the first side surface 21, and the second direction F2 is perpendicular to the second side surface 22. A first heat sink 31 is provided between two adjacent battery cells 20 along the first direction F1.

[0108] Array arrangement means that the plurality of battery cells 20 are arranged in a plurality of rows along the first direction F1 and a plurality of columns along the second direction F2. Figures 3 to 5 As shown, the battery cells 20 are arranged in ten rows along the first direction F1 and in two columns along the second direction F2 . Accordingly, the number of the battery cells 20 is twenty.

[0109] A first heat sink 31 is disposed between two battery cells 20 adjacent to each other along the first direction F1 , and the two battery cells 20 share one first heat sink 31 . The first heat sink 31 can transfer heat to the two adjacent battery cells 20 at the same time.

[0110] In some embodiments, a second heat sink 32 is disposed between two battery cells 20 adjacent to each other along the second direction F2 , and the two battery cells 20 share one second heat sink 32 , and the second heat sink 32 can transfer heat to the two adjacent battery cells 20 at the same time.

[0111] Since two battery cells 20 adjacent to each other along the first direction F1 share one first heat dissipation member 31 , the number of the first heat dissipation members 31 is reduced, thereby reducing the occupied space of the first heat dissipation members 31 .

[0112] like Figure 3 As shown, according to some embodiments of the present application, the number of the heat exchange plates 33 is two, and the two heat exchange plates 33 are respectively located at two opposite ends of the second heat dissipation element 32 .

[0113] The heat exchange plate 33 is connected to the surface of the second heat sink 32 parallel to the first side surface 21 , and the two heat exchange plates 33 are located at opposite ends of the second heat sink 32 along the first direction F1 , thereby improving the efficiency and uniformity of heat transfer between the heat exchange plate 33 and the second heat sink 32 .

[0114] By arranging the heat exchange plates 33 at both opposite ends of the second heat sink 32 , the efficiency and uniformity of heat transfer between the heat exchange plates 33 and the second heat sink 32 are improved.

[0115] The embodiment of the second aspect of the present application provides a thermal management component 30, including a first heat sink 31, a second heat sink 32 and a heat exchange plate 33. The first heat sink 31 is used to fit with the first side surface 21 of the battery cell 20, and is used to be thermally connected to the battery cell 20. The second heat sink 32 is used to fit with the second side surface 22 and / or the bottom surface of the battery cell 20, and the second heat sink 32 is thermally connected to the first heat sink 31 and the battery cell 20 respectively. The heat exchange plate 33 is connected to the surface of the second heat sink 32 parallel to the first side surface 21, and is used to perform heat exchange with the second heat sink 32.

[0116] The thermal management component 30 is a component in the battery device 100 that controls the temperature of the battery cell 20. For example, the thermal management component 30 heats the battery cell 20 when the temperature of the battery cell 20 is low, and cools the battery cell 20 when the temperature of the battery cell 20 is high, so that the temperature of the battery cell 20 can be maintained within an appropriate temperature range, thereby improving the reliability of the operation of the battery device 100.

[0117] In the thermal management component 30 , the first heat sink 31 is a component that can transfer heat with the battery cell 20 . For example, the heat of the battery cell 20 is transferred from the first side surface 21 to the first heat sink 31 to achieve cooling of the battery cell 20 , or external heat is transferred from the first side surface 21 to the battery cell 20 through the first heat sink 31 to achieve heating of the battery cell 20 .

[0118] The second heat sink 32 is a component capable of transferring heat with the battery cell 20 and the first heat sink 31. The second heat sink 32 is attached to the second side surface 22 and / or the bottom surface. It is understandable that the second heat sink 32 can be attached only to the second side surface 22, or only to the bottom surface, or to both the second side surface 22 and the bottom surface. A portion of the heat of the battery cell 20 is transferred to the second heat sink 32 through the first heat sink 31, and another portion of the heat is directly transferred to the second heat sink 32 to achieve cooling of the battery cell 20. Alternatively, external heat is transferred to the second heat sink 32, and a portion of the heat transferred to the second heat sink 32 is directly transferred to the battery cell 20, and another portion of the heat is transferred to the battery cell 20 through the first heat sink 31 to achieve heating of the battery cell 20.

[0119] The heat exchange plate 33 is a component that uses a heat exchange medium to exchange heat with the second heat sink 32. The heat exchange medium flows in the heat exchange channel, which can take away the heat transferred from the battery cell 20 and the first heat sink 31 to the second heat sink 32 to achieve cooling of the battery cell, and can also transfer the heat of the heat exchange medium to the first heat sink 31 and the battery cell 20 through the second heat sink 32 to achieve heating of the battery cell 20. The heat exchange plate 33 is connected to the surface of the second heat sink 32 parallel to the first side surface 21. The battery cell 20 and the heat exchange plate 33 do not directly contact. When heat is transferred, heat is indirectly transferred with the help of the first heat sink 31 and the second heat sink 32, which reduces the uneven heat transfer caused by the large temperature difference between the battery cell 20 and the heat exchange plate 33, and reduces the problem of affecting the stability of the battery cell 20 and the heat exchange plate 33. In some examples, the heat exchange medium can be a liquid, and the liquid can be water.

[0120] In some embodiments, the first heat sink 31 and the second heat sink 32 can be configured as a heat conducting plate or a heat pipe. The heat conducting plate is made of a heat conducting material with good thermal conductivity. The heat pipe is an element that achieves heat transfer by phase change of its internal working medium.

[0121] The thermal management component 30 can effectively and reliably control the temperature of the battery cell 20 within a suitable range, thereby improving the reliability of the battery device 100 .

[0122] An embodiment of the third aspect of the present application provides an electrical device, which includes the battery device 100 as in the above embodiment, and the electrical device is used to provide electrical energy.

[0123] The electrical equipment in this embodiment can have all the beneficial effects of the above-mentioned battery device 100, which will not be described in detail here.

[0124] An embodiment of a fourth aspect of the present application provides an energy storage device, which includes a battery device 100 as in the above embodiment.

[0125] The energy storage device in this embodiment can have all the beneficial effects of the above-mentioned battery device 100, which will not be described in detail here.

[0126] Combine the following Figures 3 to 5 The embodiments of the present application are described in further detail.

[0127] The battery device 100 includes a battery cell 20 and a thermal management assembly 30 .

[0128] The battery cell 20 includes two opposite first side surfaces 21, two opposite second side surfaces 22, and a bottom surface connecting the two first side surfaces 21 and the second side surfaces 22. There are multiple battery cells 20, and the multiple battery cells 20 are arranged in an array along a first direction F1 and a second direction F2. The first direction F1 is perpendicular to the first side surface 21, and the second direction F2 is perpendicular to the second side surface 22.

[0129] In some embodiments, the thermal management assembly 30 includes a heat conducting plate, a heat pipe and a heat exchange plate 33. The heat conducting plate is disposed between two battery cells 20 adjacent to each other along the first direction F1 and is attached to the first side surface 21. The heat conducting plate is thermally connected to the battery cell 20. The heat pipe is attached to the bottom surface and is thermally connected to the heat conducting plate and the battery cell 20. The heat exchange plate 33 is connected to the end surface of the heat pipe along the first direction F1, and the heat exchange plate 33 is used to exchange heat with the heat pipe. Heat can be transferred through the first side surface 21 and the bottom surface.

[0130] In other embodiments, the thermal management component 30 includes a heat conducting plate, a heat pipe and a heat exchange plate 33. The heat conducting plate is disposed between two battery cells 20 adjacent to each other along the first direction F1 and is attached to the first side surface 21. The heat conducting plate is thermally connected to the battery cell 20. The heat pipe is attached to the second side surface 22 and is thermally connected to the heat conducting plate and the battery cell 20. The heat conducting plate, the heat pipe and the bottom of the box 10 together define a first accommodating cavity V1 capable of accommodating the battery cell 20. The heat exchange plate 33 is connected to the end surface of the heat pipe along the first direction F1, and the heat exchange plate 33 is used for heat exchange with the heat pipe. Heat can be transferred through the first side surface 21 and the second side surface 22.

[0131] In some other embodiments, the thermal management assembly 30 includes an integrally formed heat pipe, the first portion of the heat pipe is disposed between two battery cells 20 adjacent along the first direction F1 and is in contact with the first side surface 21, the second portion of the heat pipe is disposed between two battery cells 20 adjacent along the second direction F2 and is in contact with the second side surface 22, the third portion of the heat pipe is in contact with the bottom surface, and the heat pipe is thermally connected to the battery cell 20. The three-part structure of the heat pipe defines a second accommodating cavity V2 capable of accommodating the battery cell 20. The heat exchange plate 33 is connected to the end surface of the heat pipe along the first direction F1, and the heat exchange plate 33 is used for heat exchange with the heat pipe. Heat can be transferred through the first side surface 21, the second side surface 22 and the bottom surface.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device (100), characterized in that: include: A battery cell (20) comprising two opposite first side surfaces (21), two opposite second side surfaces (22), and a bottom surface connecting the two first side surfaces (21) and the two second side surfaces (22); A thermal management assembly (30) comprising: A first heat sink (31) is attached to the first side surface (21) and is thermally connected to the battery cell (20); a second heat sink (32) affixed to the second side surface (22) and / or the bottom surface, the second heat sink (32) being thermally connected to the first heat sink (31) and the battery cell (20) respectively; A heat exchange plate (33) is connected to a surface of the second heat sink (32) parallel to the first side surface (21); a heat exchange channel for circulating a heat exchange medium is provided inside the heat exchange plate (33); and the heat exchange plate (33) is used to perform heat exchange with the second heat sink (32).

2. The battery device (100) according to claim 1, characterized in that: The projection of the first side surface (21) along the first direction (F1) completely falls within the projection of the surface of the first heat sink (31) abutting against the first side surface (21) along the first direction (F1); The first direction (F1) is perpendicular to the first side surface (21).

3. The battery device (100) according to claim 1, characterized in that: The first heat sink (31) is configured as a heat conducting plate, the second heat sink (32) is configured as a heat pipe, and the second heat sink (32) is bonded to the bottom surface.

4. The battery device (100) according to claim 3, characterized in that: The projection of the bottom surface along the vertical direction (F3) completely falls within the projection of the surface of the second heat sink (32) abutting against the bottom surface along the vertical direction (F3); The vertical direction (F3) is perpendicular to the bottom surface.

5. The battery device (100) according to claim 1, characterized in that: The first heat sink (31) is configured as a heat conducting plate, the second heat sink (32) is configured as a heat pipe, and the second heat sink (32) is in contact with the second side surface (22).

6. The battery device (100) according to claim 5, characterized in that: The battery device (100) further comprises a box body (10), wherein a portion of the box body (10) opposite to the bottom surface, the first heat sink (31) and the second heat sink (32) jointly define a first accommodation cavity (V1) for accommodating the battery cell (20).

7. The battery device (100) according to claim 5, characterized in that: The projection of the second side surface (22) along the second direction (F2) completely falls within the projection of the surface of the second heat sink (32) abutting against the second side surface (22) along the second direction (F2); The second direction (F2) is perpendicular to the second side surface (22).

8. The battery device (100) according to claim 1, characterized in that: The first heat sink (31) and the second heat sink (32) are both configured as heat pipes; the second heat sink (32) comprises a first heat sink body (321) and a second heat sink body (322); the first heat sink body (321) is bonded to the second side surface (22), and the second heat sink body (322) is bonded to the bottom surface.

9. The battery device (100) according to claim 8, characterized in that: At least two of the first heat sink (31), the first heat sink body (321) and the second heat sink body (322) are of an integrated structure, and the first heat sink (31), the first heat sink body (321) and the second heat sink body (322) jointly define a second accommodation cavity (V2) for accommodating the battery cell (20).

10. The battery device (100) according to any one of claims 1 to 9, characterized in that: The heat exchange plate (33) is provided with a mounting groove along a direction perpendicular to the first side surface (21), and the end of the second heat sink (32) is plugged into the mounting groove.

11. The battery device (100) according to any one of claims 1 to 9, characterized in that: There are a plurality of battery cells (20), and the plurality of battery cells (20) are arranged in an array along a first direction (F1) and a second direction (F2) perpendicular to the first direction (F1); the first direction (F1) is perpendicular to the first side surface (21), and the second direction (F2) is perpendicular to the second side surface (22); A first heat sink (31) is provided between two battery cells (20) adjacent to each other along the first direction (F1).

12. The battery device (100) according to any one of claims 1 to 9, characterized in that: The number of the heat exchange plates (33) is two, and the two heat exchange plates (33) are respectively located at two opposite ends of the second heat dissipation element (32).

13. A thermal management component (30), characterized in that: include: A first heat sink (31) is used to fit with a first side surface (21) of a battery cell (20) and to be thermally connected to the battery cell (20); a second heat sink (32) for being attached to a second side surface (22) and / or a bottom surface of the battery cell (20), the second heat sink (32) being thermally connected to the first heat sink (31) and the battery cell (20) respectively; A heat exchange plate (33) is connected to a surface of the second heat sink (32) parallel to the first side surface (21), and is used for performing heat exchange with the second heat sink (32).

14. An electrical device, characterized in that: The electrical equipment comprises a battery device (100) as claimed in any one of claims 1 to 12, wherein the battery device is used to provide electrical energy.

15. An energy storage device, characterized in that: The energy storage device comprises the battery apparatus (100) according to any one of claims 1 to 12.

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