Battery device, thermal management assembly and electric equipment

Abstract

The embodiment of the invention provides a battery device, a heat management assembly and electric equipment, the battery device comprises a plurality of battery monomers and the heat management assembly, the heat management assembly is arranged on the same side of the plurality of battery monomers along a first direction, the heat management assembly comprises a heat exchange piece and a heating piece, the heat exchange piece is provided with a first cavity and a second cavity which are isolated from each other, and the heating piece is arranged in the first cavity. The first cavity is configured to allow a heat exchange medium to flow, and the heating piece is at least partially arranged in the second cavity. Wherein in a projection plane perpendicular to the first direction, the orthographic projection of the first cavity is of a curved structure, and the orthographic projection of the second cavity is of a curved structure; a second cavity is arranged on at least one side of the first cavity in the direction perpendicular to the extending direction of the first cavity and in the direction perpendicular to the first direction. The reliability of the battery device is improved.

Description

Technical Field

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

[0002] With the development of new energy technologies, battery devices are being used more and more widely, for example, in mobile phones, laptop computers, battery vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools.

[0003] In the development of battery technology, how to improve the reliability of battery devices is a technical problem that needs to be solved urgently. Summary of the invention

[0004] In view of the above problems, the present application provides a battery device, an electrical device and a thermal management component, which are beneficial to improving the reliability of the battery device.

[0005] In a first aspect, the present application provides a battery device, comprising: a plurality of battery cells; a thermal management component, arranged on the same side of the plurality of battery cells along a first direction, the thermal management component comprising a heat exchange element and a heating element, the heat exchange element having a first cavity and a second cavity isolated from each other, the first cavity being configured for flow of a heat exchange medium, and the heating element being at least partially arranged in the second cavity; wherein, in a projection plane perpendicular to the first direction, an orthographic projection of the first cavity is a curved structure, and an orthographic projection of the second cavity is a curved structure; along a direction perpendicular to an extension direction of the first cavity, and along a direction perpendicular to the first direction, a second cavity is arranged on at least one side of the first cavity.

[0006] In some embodiments of the first aspect, the thermal management component is used to perform heat exchange on multiple battery cells. The thermal management component includes a heat exchange element and a heating element. The heat exchange element is provided with a first cavity and a second cavity that are isolated from each other. By setting the first cavity and the second cavity to a curved structure, it is beneficial to increase the arrangement area of ​​the first cavity and the second cavity on the heat exchange element, so that the first cavity can accommodate more heat exchange medium, and the area of ​​the heating element placed in the second cavity can be larger, which is beneficial to better improve the efficiency of heat exchange between the thermal management component and the battery cell. In addition, the heat exchange element can also protect the heating element to avoid the phenomenon of the heating element being scratched or crushed during the assembly process, thereby helping to improve the reliability of the battery device. In addition, by arranging the thermal management component on the same side of the multiple battery cells along the first direction and arranging the second cavity on the side of the first cavity, the space occupied by the heat exchange element in the first direction can be reduced, thereby helping to improve the energy density of the battery cell, and the heating element located in the second cavity can not only heat the heat exchange medium in the first cavity, but also directly heat the battery cell, so that the temperature of the battery cell can be raised to a preset temperature range more quickly, which is beneficial to improve the service life of the battery device.

[0007] In some embodiments, in a projection plane perpendicular to the first direction, the orthographic projection of the heat exchange element is a curved structure.

[0008] In the above technical solution, by setting the heat exchanger to a curved structure, it is beneficial to reduce the weight of the heat exchanger and facilitate processing and manufacturing.

[0009] In some embodiments, the heat exchange element has an opening communicating with the second chamber.

[0010] In the above technical solution, the heating element can enter the second cavity through the opening provided on the surface of the heat exchange element, which facilitates assembly.

[0011] In some embodiments, the opening includes a first opening, and along the extension direction of the second cavity, at least one side of the second cavity is provided with the first opening.

[0012] In the above technical solution, the heating element can enter the second cavity through the first opening opened on the surface of the heat exchange element, which is convenient for assembly.

[0013] In some embodiments, the opening includes a second opening, the second opening is a strip-shaped structure, and the extension direction of the second opening is the same as the extension direction of the second cavity; from the first cavity to the second cavity, a second opening is provided on the side of the heat exchange element facing away from the first cavity; and / or, a second opening is provided on at least one of the opposite sides of the heat exchange element along the first direction.

[0014] In the above technical solution, by providing a second strip-shaped opening on the heat exchange element, the heating element can enter the second cavity through the second opening, which is beneficial to improving the assembly efficiency of the heating element.

[0015] In some embodiments, the heat exchange element has a first section and a second section that are spaced apart, the second opening is located between the first section and the second section, and points from the first section to the second section. The size of the second opening is L, where 1mm≤L≤10mm.

[0016] In the above technical solution, by setting the size L of the second opening within the above range, it is helpful to ensure the effectiveness of the heating element entering the second cavity through the second opening.

[0017] In some embodiments, 2 mm ≤ L ≤ 5 mm. By further setting the size L of the second opening within the above range, the effectiveness of assembling the heating element through the second opening can be ensured, and the protective effect of the heat exchange element on the heating element can be improved.

[0018] In some embodiments, the heat exchange element includes a heat exchange body and a protective part that are interconnected, the heat exchange body has a first cavity, the protective part includes a first wall and a second wall, at least one of the first wall and the second wall is connected to the heat exchange body, and the wall of the heat exchange body arranged toward the protective part is enclosed by the first wall and the second wall to form a second cavity.

[0019] In the above technical solution, the heat exchange body and the protective part can be assembled by a variety of connection methods, which is conducive to improving the flexibility of use of the thermal management component, thereby helping to improve the flexibility of use of the battery device.

[0020] In some embodiments, both the first wall and the second wall are connected to the heat exchange body, and the first wall and the second wall are spaced apart along the first direction.

[0021] By configuring in the above manner, the weight of the heat exchange element can be reduced while the protective effect on the heating element can be enhanced.

[0022] In some embodiments, the protection part also includes a third wall, which is connected between the first wall and the second wall and is spaced apart from the heat exchange body. The wall of the heat exchange body arranged toward the protection part is surrounded by the first wall, the second wall and the third wall to form a second cavity.

[0023] The above arrangement is helpful to better improve the protection of the heating element.

[0024] In some embodiments, in a first direction, the heat exchange body has a first surface and a second surface located on opposite sides, the first wall has a third surface facing away from the second wall, and the second wall has a fourth surface facing away from the first wall; the first surface and the third surface are located in the same extension plane, and / or the second surface and the fourth surface are located in the same extension plane.

[0025] In the above technical solution, the heat exchange component can be arranged more flatly, which is convenient for assembly and can also reduce the occupied space.

[0026] In some embodiments, the heat exchange body and the protection portion are an integrated structure.

[0027] The above arrangement is beneficial to improving the processing efficiency of the heat exchange element, and can also improve the connection strength between the heat exchange body and the protective part, thereby helping to improve the structural strength of the heat exchange element and further improve the reliability of the battery device.

[0028] In some embodiments, the second cavity is provided with a plurality of heating elements, which is helpful to improve the heat exchange efficiency between the thermal management component and the battery cell, thereby better improving the performance of the battery device.

[0029] In some embodiments, the battery device further includes a first heat-conducting structure, the first heat-conducting structure is disposed in the second cavity, and the heating element is connected to the heat exchange element via the first heat-conducting structure.

[0030] In the above scheme, by providing the first heat-conducting structure, it is helpful to improve the heating efficiency of the heating element on the heat exchange element and the heat exchange medium in the second cavity, thereby further improving the heat exchange efficiency between the thermal management component and the battery cell.

[0031] In some embodiments, the battery device further comprises a box having a receiving cavity in which the battery cell is disposed; the thermal management component is disposed on a side of the box facing away from the battery cell along the first direction; and / or the thermal management component is disposed in the receiving cavity.

[0032] The above arrangement is helpful to improve the flexibility of using the battery device.

[0033] In some embodiments, the battery device further includes a second heat-conducting structure, which is disposed between the thermal management component and the housing, and the thermal management component is connected to the housing via the second heat-conducting structure.

[0034] In the above solution, by providing the second heat-conducting structure, it is helpful to improve the heating efficiency of the box body by the thermal management component, and the box body can transfer heat to the battery cells adjacent thereto, so that the temperature of the battery cells can be increased faster.

[0035] In a second aspect, the present application provides a thermal management component, comprising: a heat exchange element, having a first cavity and a second cavity isolated from each other, the first cavity being configured to allow a heat exchange medium to flow; a heating element, the heating element being at least partially disposed in the second cavity; wherein, in a projection plane perpendicular to the first direction, an orthographic projection of the first cavity is a curved structure, and an orthographic projection of the second cavity is a curved structure; a second cavity is provided on at least one side of the first cavity along a direction perpendicular to an extension direction of the first cavity, and along a direction perpendicular to the first direction.

[0036] In some embodiments of the second aspect, the thermal management component includes a heat exchanger and a heating element. The heat exchanger is provided with a first cavity and a second cavity isolated from each other. The first cavity is used for the flow of heat exchange medium, and the second cavity is used for placing the heating element. By setting the first cavity and the second cavity as a curved structure, it is beneficial to increase the layout area of ​​the first cavity and the second cavity on the heat exchanger, so that the first cavity can accommodate more heat exchange medium, and the area of ​​the heating element placed in the second cavity can be larger, which is beneficial to improve the thermal management efficiency of the thermal management component. In addition, the heat exchanger can also protect the heating element to avoid scratches or crushing of the heating element during the assembly process, thereby helping to improve the reliability of the thermal management component. In addition, by setting the second cavity on the side of the first cavity, the space occupied by the heat exchanger in the first direction can be reduced, which is beneficial to improve the space utilization of the thermal management component.

[0037] In a third aspect, the present application provides an electrical device, the electrical device comprising the battery device provided according to any embodiment of the first aspect, or the electrical device comprising the thermal management component provided according to any embodiment of the second aspect.

[0038] 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

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0040] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application; Figure 2 A schematic diagram of the structure of a battery cell assembly provided in some embodiments of the present application; Figure 3 A schematic diagram of an exploded structure of a battery cell provided in some embodiments of the present application; Figure 4 A schematic diagram of an exploded structure of a battery device provided in some embodiments of the present application; Figure 5 A schematic diagram of the structure of a thermal management component provided in some embodiments of the present application; Figure 6 for Figure 5 The enlarged view of P in the middle; Figure 7A schematic diagram of a partial structure of a heat exchanger in a thermal management assembly provided in some embodiments of the present application; Figure 8 A schematic diagram of a partial structure of a thermal management component provided in some embodiments of the present application; Fig. 9 A schematic diagram of a partial structure of a heat exchanger in a thermal management assembly provided in some other embodiments of the present application; Fig.10 A partial cross-sectional view of a heat exchange element in a thermal management assembly provided in some embodiments of the present application; Fig.11 A partial cross-sectional view of a heat exchange component in a thermal management assembly provided in some other embodiments of the present application; Fig.12 A partial cross-sectional view of a heat exchange element in a thermal management assembly provided in some further embodiments of the present application.

[0041] The reference numerals of the specific embodiments are as follows: 100. Vehicle; 1. Battery device; 2. Controller; 3. Motor; 4. Battery cell assembly; 10. Battery cell; 11. Shell; 111. End cap; 112. Shell; 12. Electrode assembly; 13. Electrode terminal; 14. Pressure relief mechanism; 20. thermal management component; 21. heat exchange element; 201. first cavity; 202. second cavity; 2031. first opening; 2032. second opening; 204. first cross section; 205. second cross section; 211, heat exchange body; 2111, first surface; 2112, second surface; 212, protection portion; 2121, first wall; 21211, third surface; 2122, second wall; 21221, fourth surface; 2123, third wall; 22. Heating element; 30. Box body; 301. Accommodating chamber; 31. Frame; 32. Top wall; 33. Bottom wall; 40. Protective plate; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application 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 drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0044] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places 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.

[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can 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 application generally indicates that the associated objects before and after are in an "or" relationship.

[0047] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0048] The term “plurality” used in this application refers to two or more (including two).

[0049] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices 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 military equipment and aerospace and other fields. With the continuous expansion of the application field of battery devices, the market demand is also constantly expanding.

[0050] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0051] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0052] In order to improve the performance of battery cells to quickly heat up under low temperature conditions, the battery device in the related art will be equipped with a heating component inside the battery device. However, due to the unreasonable positioning of the heating component, during the assembly or normal operation of the battery device, the heating element is likely to interfere with other components and cause electrical connection problems, thereby affecting the normal use of the battery device.

[0053] Based on the above technical problems, the present application provides a battery device, including a battery cell and a thermal management component. The thermal management component is arranged on the same side of a plurality of battery cells along a first direction, and the thermal management component includes a heat exchange component and a heating component, and the heat exchange component has a first cavity and a second cavity isolated from each other, the first cavity is configured for the flow of a heat exchange medium, and the heating component is at least partially arranged in the second cavity; wherein, in a projection plane perpendicular to the first direction, the orthographic projection of the first cavity is a curved structure, and the orthographic projection of the second cavity is a curved structure; along a direction perpendicular to the extension direction of the first cavity, and along a direction perpendicular to the first direction, at least one side of the first cavity is provided with a second cavity.

[0054] By setting both the first cavity and the second cavity as a curved structure, it is beneficial to increase the layout area of ​​the first cavity and the second cavity on the heat exchanger, so that the first cavity can accommodate more heat exchange medium, and the area of ​​the heating element placed in the second cavity can be larger, which is beneficial to better improve the efficiency of heat exchange between the thermal management component and the battery cell. In addition, the heat exchanger can also protect the heating element to avoid the phenomenon of the heating element being scratched or crushed during the assembly process, which is beneficial to improve the reliability of the battery device. In addition, by arranging the thermal management component on the same side of multiple battery cells along the first direction and arranging the second cavity on the side of the first cavity, the space occupied by the heat exchanger in the first direction can be reduced, which is beneficial to improve the energy density of the battery cell, and the heating element located in the second cavity can not only heat the heat exchange medium in the first cavity, but also directly heat the battery cell, so that the temperature of the battery cell can be raised to a preset temperature range more quickly, which is beneficial to improve the service life of the battery device.

[0055] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0056] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using battery devices. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0057] For example, Figure 1 As shown, Figure 1 This is a structural schematic diagram of a vehicle 100 according to an embodiment of the present application. The vehicle 100 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 3, a controller 2 and a battery device 1 may be provided inside the vehicle 100. The controller 2 is used to control the battery device 1 to power the motor 3. For example, a battery device 1 may be provided at the bottom, front or rear of the vehicle 100. The battery device 1 may be used to power the vehicle 100. For example, the battery device 1 may be used as an operating power source for the vehicle 100, for the circuit system of the vehicle 100, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 100. In another embodiment of the present application, the battery device 1 may not only be used as an operating power source for the vehicle 100, but also as a driving power source for the vehicle 100, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100.

[0058] See also Figure 2The battery apparatus 1 mentioned in the embodiment of the present application may include one or more battery cell assemblies 4 for providing voltage and capacity. The battery cell assembly 4 may include a plurality of battery cells 10, and the plurality of battery cells 10 are connected in series, in parallel or in mixed connection through a busbar component.

[0059] In some embodiments, a battery cell assembly 4 is generally formed by arranging a plurality of battery cells 10 .

[0060] As an example, the battery cell assembly 4 may be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells 10 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 10 by a cable tie.

[0061] See also Figure 3 The battery cell 10 includes a housing 11 , an electrode assembly 12 and an electrode terminal 13 .

[0062] The housing 11 is a component for forming an internal environment of the battery cell 10, and the internal environment formed by the housing 11 can be used to accommodate the electrode assembly 12, and can also be used to accommodate electrolyte and other components. Optionally, the housing 11 can be made of, but not limited to, metal or non-metal materials, for example, the metal material can be copper, aluminum or stainless steel, etc.; the non-metal material can be polyethylene, polypropylene or polyvinyl chloride, etc.

[0063] For example, the housing 11 may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0064] In some embodiments, the housing 11 may be a sealed structure or a non-sealed structure. As an example, when the housing 11 is a non-sealed structure, the housing 11 plays a role in protecting the electrode assembly 12, and a sealing bag is also included between the housing 11 and the electrode assembly 12, and the sealing bag is used to encapsulate the electrode assembly 12 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the housing 11 is a sealed structure, it is used to encapsulate the electrode assembly 12, the electrolyte and other components.

[0065] In some embodiments, the housing 11 includes an end cap 111 and a shell 112. The shell 112 is provided with a shell opening, and the end cap 111 is provided to cover the shell opening. The shell 112 may be provided with one or more shell openings. One or more end caps 111 may also be provided.

[0066] The shape of the housing 11 can be determined according to the specific shape of the electrode assembly 12. For example, if the electrode assembly 12 is a rectangular parallelepiped structure, a rectangular housing can be selected; if the electrode assembly 12 is a cylindrical structure, a cylindrical housing can be selected.

[0067] The electrode assembly 12 is a component where electrochemical reactions occur in the battery cell 10 , and the housing 11 may contain one or more electrode assemblies 12 .

[0068] In some embodiments, the shape of the electrode assembly 12 can be cylindrical, flat, or polygonal.

[0069] The electrode assembly 12 may be a wound structure, a laminated structure, or a mixed structure of a wound structure and a laminated structure.

[0070] The electrode assembly 12 includes a positive electrode, a negative electrode, and a separator, and the separator is arranged between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell 10, active ions (such as lithium ions) are inserted and removed back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow the active ions to pass through.

[0071] In some embodiments, at least one electrode terminal 13 is disposed on the housing 11, and the electrode terminal 13 is electrically connected to the tab of the electrode assembly 12. The electrode terminal 13 may be directly connected to the tab, or may be indirectly connected to the tab through a current collecting member.

[0072] The electrode terminal 13 can be used to electrically connect to the electrode assembly 12 to output or input the electrical energy of the battery cell 10. The electrode terminal 13 can be electrically connected to the electrode assembly 12 by connecting to the tab. The tab electrically connected to the electrode terminal 13 can be a positive tab or a negative tab.

[0073] Please continue reading Figure 3 In some embodiments, a pressure relief mechanism 14 is disposed on the housing 11 . The pressure relief mechanism 14 is used to discharge the internal gas of the battery cell 10 .

[0074] As an example, the battery cell 10 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery.

[0075] See also Figure 4 In some embodiments, the battery device 1 may be a battery pack, which includes a box 30 and one or more battery cell assemblies 4 , wherein the battery cell assemblies 4 are accommodated in the box 30 .

[0076] As an example, the battery cell assembly 4 may be a battery module, and the battery cell assembly 4 may be accommodated in the box body 30 by fixing the battery module in the box body 30 .

[0077] As an example, the battery cell assembly 4 may also be accommodated in the case 30 by directly fixing the plurality of battery cells 10 to the case 30 .

[0078] In some embodiments, the box 30 may be a part of the chassis structure of the vehicle 100. For example, part of the box 30 may become at least a part of the floor of the vehicle 100, or part of the box 30 may become at least a part of the cross beam and longitudinal beam of the vehicle 100.

[0079] The box body 30 may be a simple three-dimensional structure such as a single cuboid or a cylinder, or may be a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids or cylinders, which is not limited in the embodiment of the present application.

[0080] Specifically, the box body 30 may be a metal shell made of alloy steel, alloy aluminum, etc., or a composite material shell made of metal and polypropylene, etc.

[0081] Please also read Figures 4 to 7 According to an embodiment of the present application, a battery device 1 is provided, comprising a plurality of battery cells 10 and a thermal management component 20. The thermal management component 20 is disposed on the same side of the plurality of battery cells 10 along a first direction X. The thermal management component 20 comprises a heat exchange component 21 and a heating component 22. The heat exchange component 21 has a first cavity 201 and a second cavity 202 isolated from each other. The first cavity 201 is configured for heat exchange medium to flow, and the heating component 22 is at least partially disposed in the second cavity 202. In the projection plane perpendicular to the first direction X, the orthographic projection of the first cavity 201 is a curved structure, and the orthographic projection of the second cavity 202 is a curved structure. The second cavity 202 is disposed on at least one side of the first cavity 201 in a direction perpendicular to the extension direction of the first cavity 201 and in a direction perpendicular to the first direction X.

[0082] The thermal management component 20 is used to dissipate heat, cool down or heat the battery cell 10 to adjust the temperature of the battery cell 10 within a suitable range so that the battery cell 10 can operate under good temperature conditions, which is beneficial to improving the operating reliability and service life of the battery cell 10.

[0083] The thermal management component 20 includes a heat exchanger 21, which is used to exchange heat with the battery cell 10, that is, the heat between the heat exchanger 21 and the battery cell 10 can be transferred between the two. The heat exchanger 21 has a first cavity 201 and a second cavity 202 that are isolated from each other, where "isolated from each other" means that the first cavity 201 and the second cavity 202 are not connected to each other and are two independent cavities.

[0084] The heat exchange medium can flow in the first cavity 201 to exchange heat with the battery cell 10. The heat exchange medium can have various forms, for example, the heat exchange medium can include water, air, phase change material, etc. The second cavity 202 is used to accommodate at least part of the heating element 22. The heating element 22 can heat the heat exchange medium in the first cavity 201 to improve the heating efficiency of the heat exchange medium on the battery cell 10.

[0085] It should be noted that in certain scenarios, such as low temperature in winter, the rapid temperature rise of the battery cell 10 cannot be met by heat exchange medium alone, and the battery cell 10 cannot quickly enter the fast charging mode, which easily affects the use needs of the battery device 1. Therefore, by providing a heating element 22 in the second cavity 202 of the heat exchange element 21, the heating element 22 can make the heat exchange medium flowing in the first cavity 201 rise in temperature more quickly, thereby better meeting the temperature requirements of the battery cell 10 for rapid charging and discharging, and making the temperature of the battery cell 10 rise more quickly to a preset temperature range, thereby helping to increase the service life of the battery device 1.

[0086] Furthermore, by arranging a plurality of battery cells 10 on the upper or lower side of the thermal management component 20 along the first direction X, and arranging the second cavity 202 on the left and / or right side of the first cavity 201, the heating element 22 can not only quickly heat up the heat exchange medium, but also heat the cavity wall of the second cavity 202, so that the overall temperature of the heat exchange element 21 rises faster, so as to directly heat the battery cell 10, thereby better improving the heating efficiency of the thermal management component 20 for the battery cell 10, and making the temperature of each part of the heat exchange element 21 tend to be consistent, thereby ensuring the temperature uniformity of the heat exchange element 21.

[0087] The heating element 22 may be an electric heating component that can convert electrical energy into thermal energy. The heating element 22 may be connected to a power source to achieve its heating function, and may also be connected to an external power source through an electrical connection component. The heating element 22 may have various forms. For example, the heating element 22 may be a heating wire. The heating wire may include a metal wire structure. The metal structure includes but is not limited to any one of an iron-chromium-aluminum alloy, a nickel-chromium alloy, a copper-nickel alloy, and stainless steel. The heating wire may also include a non-metallic structure, such as carbon fiber.

[0088] The heating wire occupies a small area, is easy to change shape, is easy to assemble, easy to obtain, and is conducive to reducing costs. Optionally, the heating element 22 can also be configured as a heating plate or a heating strip.

[0089] The heating element 22 is integrated in the heat exchange element 21. The heating element 22 can be pre-assembled in the heat exchange element 21 before the thermal management assembly 20 is assembled in the battery device 1. The operation is convenient and it is easy to reduce the situation where the heating element 22 is scratched or crushed during the assembly process, so as to avoid the heating element 22 from being electrically connected, which is beneficial to improving the reliability and service life of the heating element 22, thereby improving the reliability of the battery device 1. Of course, in the actual assembly process of the battery device 1, the heat exchange element 21 and the heating element 22 can also be assembled independently.

[0090] Since the heating element 22 can be accommodated in the second cavity 202 of the heat exchange element 21, the heat exchange element 21 can protect the heating element 22 and also prevent the heating element 22 from being scratched or crushed during the assembly process, so that the heating element 22 will not interfere with other components in the battery device 1.

[0091] Furthermore, by arranging the heating element 22 in the second cavity 202, the risk of displacement of the heating element 22 due to aging of the adhesive can be reduced, and the risk of dry burning caused by foreign matter due to lack of protection can be reduced. The heat generated by the heating element 22 can be taken away by the heat exchange medium in a timely manner, which can improve the heat utilization rate while also improving the heat exchange efficiency between the heat exchange medium and the heating element 22, which is conducive to ensuring the temperature uniformity of the heat exchange element 21 and can better improve the performance of the battery device 1. In addition, combining the heat exchange element 21 and the heating element 22 into one body is conducive to making the structure of the thermal management component 20 more compact and reducing costs, thereby improving the space utilization of the thermal management component 20 and the battery device 1.

[0092] Therefore, the battery device provided in some embodiments of the present application, by being provided with a thermal management component 20, can keep the temperature of the battery cell 10 within an appropriate temperature range to improve the performance of the battery device 1, and the thermal management component 20 includes a heat exchange element 21 and a heating element 22. By integrating the heating element 22 into the second cavity 202 of the heat exchange element 21, it is possible to improve the heating efficiency of the thermal management component 20 on the battery cell 10 and ensure the temperature uniformity of the heat exchange element 21. In addition, the heat exchange element 21 can also protect the heating element 22 to ensure the safety of the heating element 22 during use, thereby helping to improve the reliability of the battery device 1.

[0093] In the embodiment of the present application, the first direction X may be the height direction of the battery cell 10 or the thickness direction of the thermal management component 20 , the second direction Y may be the width direction of the battery cell 10 , and the third direction Z may be the length direction of the battery cell 10 .

[0094] The curved structure may include an arc structure, that is, the orthographic projections of the first cavity 201 and / or the second cavity 202 in the projection plane perpendicular to the first direction X have a certain curvature. The curved structure may also include a broken line structure, that is, the orthographic projections of the first cavity 201 and / or the second cavity 202 in the projection plane perpendicular to the first direction X may be formed by connecting some straight line segments, and the turning angle between each two adjacent line segments may be an acute angle, a right angle, an obtuse angle or a flat angle. Alternatively, the curved structure may also include a combination formed by combining an arc structure and a broken line structure.

[0095] The battery device 1 provided in some embodiments of the present application is arranged in the above manner, which is conducive to increasing the arrangement area of ​​the first cavity 201 and the second cavity 202 on the heat exchange element 21, so that the first cavity 201 can accommodate more heat exchange medium, and the area of ​​the heating element 22 contained in the second cavity 202 can be larger, which is conducive to better improving the efficiency of heat exchange between the thermal management component 20 and the battery cell 10, so that the temperature of the battery cell 10 can be increased more quickly, and further conducive to improving the performance and service life of the battery device 1.

[0096] The first cavity 201 may be a strip-shaped structure, and “along the direction perpendicular to the extension direction of the first cavity 201, and along the direction perpendicular to the first direction X” may be understood as the first cavity 201 may be a strip-shaped structure with different extension directions, and the direction perpendicular to the extension direction of the first cavity 201 may be the first direction X, or may be multiple directions located in the same extension plane as the extension direction of the first cavity 201. Therefore, “the extension direction of the first cavity 201 is located in multiple directions in the same extension plane” can simultaneously meet the above two limitations on the design positions of the first cavity 201 and the second cavity 202.

[0097] Among them, being located in the same extension plane as the extension direction of the first cavity 201 can be understood as that the direction perpendicular to the extension direction of the first cavity 201 is perpendicular to the first direction X, that is, the second cavity 202 is not arranged on any side of the first cavity 201 along the first direction X, the arrangement of the second cavity 202 will not occupy the space of the battery device 1 in the first direction X, and the heating element 22 and the heat exchange medium can be arranged close to the battery cell 10, so that the heat emitted by the heating element 22 can be transferred to the battery cell 10 more quickly, thereby improving the heating efficiency and heating accuracy.

[0098] “In a direction perpendicular to the first direction X” can also be understood as, in the projection plane perpendicular to the first direction X, the orthographic projection of the first cavity 201 and the orthographic projection of the second cavity 202 are interlaced. Interlaced orthographic projections mean that the orthographic projection of the first cavity 201 in the projection plane perpendicular to the first direction X and the orthographic projection of the second cavity 202 in the projection plane perpendicular to the first direction X do not have overlapping parts.

[0099] Alternatively, it can also be understood that, in the first direction X, the heat exchange element 21 has a top surface, a bottom surface, and a first side surface and a second side surface connected between the top surface and the bottom surface, the top surface is arranged toward the battery cell 10, the first side surface and the second side surface are arranged at intervals, the first cavity 201 and the second cavity 202 are both formed between the top surface and the bottom surface, and the first side surface points to the direction of the second side surface, and the first cavity 201 and the second cavity 202 are distributed at intervals.

[0100] Optionally, a second cavity 202 may be provided on the side of the first side facing away from the second side; or, a second cavity 202 may be provided on the side of the second side facing away from the first side; or, a second cavity 202 may be provided on the side of the first side facing away from the second side, and a second cavity 202 may also be provided on the side of the second side facing away from the first side, and the second cavity 202 may be arranged in sequence from the first side to the second side.

[0101] The battery device 1 provided in some embodiments of the present application can reduce the space occupied by the thermal management component 20 in the first direction X by arranging the second cavity 202 on the side of the first cavity 201, that is, the first cavity 201 and the second cavity 202 are both arranged toward the battery cell 10, which is beneficial to increase the design height of the battery cell 10 to improve the energy density of the battery cell 10, thereby facilitating the improvement of the performance of the battery device 1, or it can also reduce the size of the battery device 1 in the first direction X, which is beneficial to improve the space utilization of the battery device 1.

[0102] Furthermore, the heat generated by the heating element 22 can also be directly transferred to the battery cell 10 through the heat exchange element 21, which can better improve the heating efficiency of the thermal management component 20 on the battery cell 10, thereby increasing the temperature of the battery cell 10 more quickly, thereby helping to improve the performance and service life of the battery device 1.

[0103] Optionally, the heat exchange element 21 may directly contact the battery cell 10 to achieve contact heat exchange, or a heat-conducting adhesive or other components may be provided between the heat exchange element 21 and the battery cell 10 for heat exchange.

[0104] Optionally, the second cavity 202 may be completely located inside the heat exchange element 21 , or the second cavity 202 may be configured as a groove-shaped structure with an opening.

[0105] Optionally, the heating element 22 may be entirely located within the second cavity 202, or may partially extend out of the second cavity 202. It should be noted that the portion of the heating element 22 extending out of the second cavity 202 should be coated with insulating material or wrapped or separated by other insulating materials to avoid safety issues such as electrical connection with external components.

[0106] The plurality of battery cells 10 may be arranged along the second direction Y and the third direction Z, and the thermal management assembly 20 may be located on the same side of all the battery cells 10 along the first direction X.

[0107] Optionally, the number of the heat exchange element 21 can be set to one, or of course, can also be set to multiple.

[0108] There are many ways to form the first cavity 201 and the second cavity 202. Optionally, an etching process can be used to form the first cavity 201 and the second cavity 202 with specific size and shape through processes such as coating, exposure, development, etching, and cleaning. This also helps to make the surface of the first cavity 201 and the second cavity 202 smooth, reducing the risk of burrs, flash, and other problems.

[0109] Optionally, the heating element 22 may be configured as a curved structure to match the shape of the second cavity 202 .

[0110] Optionally, the heat exchange element 21 may be configured as a plate-like structure, or may be configured as a bent tube structure.

[0111] See also Figure 5 and Figure 6 In some optional embodiments, in a projection plane perpendicular to the first direction X, the orthographic projection of the heat exchange element 21 is a curved structure.

[0112] By configuring the heat exchanger 21 as a curved structure, it is beneficial to reduce the weight of the heat exchanger 21 and is also convenient to process the first cavity 201 and the second cavity 202 isolated from each other in the heat exchanger 21, thereby facilitating processing and manufacturing.

[0113] Optionally, the heat exchange element 21 with a curved structure may be provided as one or more.

[0114] Exemplarily, the heat exchangers 21 with curved structures are arranged in pairs, and the heat exchangers 21 arranged in pairs are symmetrically arranged along the second direction Y. Each heat exchanger 21 includes a plurality of straight segments extending along the third direction Z, and the plurality of straight segments are arranged at intervals along the second direction Y, and two adjacent straight segments are connected by a connecting segment. The connecting segment can have a variety of structural forms, for example, the connecting segment can also include a straight structure, or the connecting segment can also include a broken line segment or a curved segment, etc. Optionally, at least part of the connecting segment includes an arc structure.

[0115] In some optional embodiments, the heat exchange element 21 has an opening communicating with the second chamber 202 .

[0116] In the battery device 1 provided in some embodiments of the present application, an opening communicating with the second cavity 202 is provided on the surface of the heat exchange element 21 , so that the heating element 22 can enter the second cavity 202 through the opening, which is convenient for assembly.

[0117] Please also read Figures 6 to 10 In some optional embodiments, the opening includes a first opening 2031 , and along the extension direction of the second cavity 202 , at least one side of the second cavity 202 is provided with the first opening 2031 .

[0118] In the above technical solution, the heating element 22 can enter the second cavity 202 through the first opening 2031 opened on the surface of the heat exchange element 21, which is convenient for assembly.

[0119] Exemplarily, the second cavity 202 is in a strip-shaped structure, and along the extension direction of the second cavity 202, both sides of the second cavity 202 are provided with first openings 2031. In the specific assembly process of the heating element 22, a traction device or an electric mechanism can be placed at the front end of the heating element 22 to drive the heating element 22 to enter the second cavity 202 through one of the first openings 2031 and extend out from the other first opening 2031.

[0120] Please also read Figures 8 to 12 In some optional embodiments, the opening includes a second opening 2032, the second opening 2032 is a strip-shaped structure, the extension direction of the second opening 2032 is the same as the extension direction of the second cavity 202, and the direction from the first cavity 201 to the second cavity 202 is the same, and the second opening 2032 is provided on the side of the heat exchange element 21 facing away from the first cavity 201; and / or, the second opening 2032 is provided on at least one of the opposite sides of the heat exchange element 21 along the first direction X.

[0121] The second cavity 202 may be in a strip-shaped structure. By providing a strip-shaped second opening 2032 on the heat exchange element 21 , the heating element 22 can enter the second cavity 202 through the second opening 2032 , which is beneficial to improving the assembly efficiency of the heating element 22 .

[0122] like Fig.12 As shown, in some embodiments, in the first direction X, the side of the heat exchange element 21 facing the battery cell 10 is provided with a second opening 2032 connected to the second cavity 202, or the side of the heat exchange element 21 facing away from the battery cell 10 is provided with a second opening 2032 connected to the second cavity 202.

[0123] like Fig.10 and Fig.11As shown, in other embodiments, in the direction from the first cavity 201 to the second cavity 202, the side of the heat exchange member 21 facing away from the first cavity 201 is provided with a second opening 2032 communicating with the second cavity 202. By arranging the second opening 2032 on the side of the heat exchange member 21, the possibility of electrical connection between the heating element 22 and the battery cell 10 can be reduced or even eliminated, and both side surfaces of the heat exchange member 21 along the first direction X can protect the heating element 22, and can also prevent the battery cell 10 or other components from crushing the heating element 22, so as to ensure the safety of the heating element 22, thereby facilitating the reliability of the battery device 1.

[0124] Exemplarily, the heat exchange element 21 is provided with a first opening 2031 and a second opening 2032 communicated with the second chamber 202 , and the first opening 2031 is communicated with the second opening 2032 .

[0125] like Fig.10 As shown, in some optional embodiments, the heat exchange element 21 has a first section 204 and a second section 205 that are spaced apart, and the second opening 2032 is located between the first section 204 and the second section 205, pointing from the first section 204 to the direction of the second section 205, and the size of the second opening 2032 is L, wherein 1mm≤L≤10mm.

[0126] Exemplarily, in the direction from the first cavity 201 to the second cavity 202 , a second opening 2032 communicating with the second cavity 202 is provided on a surface of the heat exchange element 21 facing away from the first cavity 201 , and a dimension of the second opening 2032 in the first direction X is L.

[0127] As an example, the value of L can be, but is not limited to, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc.

[0128] If the value of L is set too small, i.e., less than 1 mm, the width of the second opening 2032 will be too small, making it difficult to put the heating element 22 into the second cavity 202 through the second opening 2032. If the value of L is set too large, i.e., greater than 10 mm, the width of the second opening 2032 will be too large, and the heating element 22 in the second cavity 202 may fall, and the protective effect of the heat exchange element 21 on the heating element 22 will also be reduced.

[0129] Therefore, by setting the value of L between 1mm and 10mm, including the two endpoint values ​​of 1mm and 10mm, it is beneficial to ensure the effectiveness of the heating element 22 entering the second cavity 202 through the second opening 2032, thereby improving the assembly efficiency of the thermal management component 20, and can also ensure the reliability of the heating element 22 in the second cavity 202.

[0130] like Fig.10 As shown, in some optional embodiments, 2mm≤L≤5mm.

[0131] By further setting the value of L between 2 mm and 2 mm, including the two end values ​​of 2 mm and 5 mm, the assembly efficiency of the thermal management component 20 can be further improved, and the protective element can better protect the heating element 22.

[0132] Optionally, the value of L may be less than or equal to the size of the heat exchange element 21 in the first direction X.

[0133] See also Figures 9 to 12 In some optional embodiments, the heat exchange element 21 includes a heat exchange body 211 and a protective part 212 that are connected to each other, the heat exchange body 211 has a first cavity 201, the protective part 212 includes a first wall 2121 and a second wall 2122, at least one of the first wall 2121 and the second wall 2122 is connected to the heat exchange body 211, and the wall of the heat exchange body 211 arranged toward the protective part 212 is enclosed by the first wall 2121 and the second wall 2122 to form a second cavity 202.

[0134] Exemplarily, the number of the protection parts 212 is set to two, and the two protection parts 212 are respectively arranged on both sides of the heat exchange body 211 .

[0135] The thermal management component 20 may include a variety of molding methods. For example, the heat exchange body 211 and the protective part 212 may be provided separately and then assembled. They may be assembled according to requirements so that the two have a combination of a variety of positional relationships, which is beneficial to improving the use flexibility of the thermal management component 20, and further to improving the use flexibility of the battery device 1. For another example, the heat exchange body 211 and the protective part 212 may also be integrally molded, which is beneficial to improving production efficiency.

[0136] The battery device 1 provided in some embodiments of the present application is configured in the above manner, and the heat exchange body 211 and the protective portion 212 can be assembled in a variety of connection methods, which is beneficial to improving the flexibility of use of the thermal management component 20, thereby improving the flexibility of use of the battery device 1.

[0137] The protection portion 212 includes a first wall 2121 and a second wall 2122 , which is beneficial to reducing the material usage and the overall weight of the heat exchange element 21 , thereby reducing the weight and cost of the thermal management component 20 and the battery device 1 .

[0138] The first wall 2121 and the second wall 2122 may have various arrangements, for example, Fig.11As shown, the first wall 2121 and the second wall 2122 are both connected to the heat exchange body 211 and are arranged opposite to each other along the first direction X, from the first cavity 201 to the second cavity 202 , and the second opening 2032 is formed on the side of the protective portion 212 facing away from the heat exchange body 211 .

[0139] For example, Fig.12 As shown, the second wall 2122 is connected to the heat exchange body 211, and the direction from the first cavity 201 to the second cavity 202 is pointed. The first wall 2121 is connected to the side of the second wall 2122 facing away from the heat exchange body 211. In the first direction X, the second opening 2032 is formed on the side of the protective portion 212 facing the battery cell 10, or the second opening 2032 is formed on the side of the protective portion 212 facing away from the battery cell 10.

[0140] In some embodiments, the first wall 2121 and the second wall 2122 are both connected to the heat exchange body 211 , and the first wall 2121 and the second wall 2122 are spaced apart along the first direction X.

[0141] One of the first wall 2121 and the second wall 2122 is arranged along the first direction X toward the battery cell 10, which can avoid the risk of contact between the battery cell 10 and the heating element 22. The other of the first wall 2121 and the second wall 2122 is arranged along the first direction X away from the battery cell 10, which can protect the heating element 22 during the operation of the battery device 1 to avoid the vibration during the operation directly acting on the heating element 22, and can also avoid the risk of displacement or even falling of the heating element 22 during the operation, which is beneficial to improving the service life and reliability of the thermal management component 20 and the battery device 1.

[0142] By configuring in the above manner, the weight of the heat exchange element 21 can be reduced while the protection effect on the heating element 22 can be enhanced.

[0143] like Fig.10 As shown, in some embodiments, the protective part also includes a third wall 2123, which is connected between the first wall 2121 and the second wall 2122, and is spaced apart from the heat exchange body 211. The wall of the heat exchange body 211 disposed toward the protective part 212 is enclosed by the first wall 2121, the second wall 2122 and the third wall 2123 to form a second cavity 202.

[0144] By providing the third wall 2123 , which is arranged around the side of the second cavity 202 , the protection of the heating element 22 can be better improved.

[0145] In some embodiments, the second opening 2032 is formed on the third wall 2123 , and the third wall 2123 has a first section 204 and a second section 205 spaced apart along the first direction X. The dimension of the second opening 2032 in the first direction X is L.

[0146] In some other embodiments, the second opening 2032 is formed on the first wall 2121 , pointing from the first cavity 201 to the direction of the second cavity 202 , and the first wall 2121 has a first section 204 and a second section 205 that are spaced apart.

[0147] In some other embodiments, the second opening 2032 is formed on the second wall 2122 , pointing from the first cavity 201 to the second cavity 202 , and the second wall 2122 has a first section 204 and a second section 205 that are spaced apart.

[0148] See also Fig.10 and Fig.11 In some optional embodiments, in the first direction X, the heat exchange body 211 has a first surface 2111 and a second surface 2112 located on opposite sides, the first wall 2121 has a third surface 21211 facing away from the second wall 2122, and the second wall 2122 has a fourth surface 21221 facing away from the first wall 2121. The first surface 2111 and the third surface 21211 are located in the same extension plane. And / or, the second surface 2112 and the fourth surface 21221 are located in the same extension plane.

[0149] Among them, the first surface 2111 can be the surface of the heat exchange body 211 facing the battery cell 10 along the first direction X, the second surface 2112 can be the surface of the heat exchange body 211 along the first direction X facing away from the battery cell 10, the third surface 21211 can be the surface of the protective part 212 along the first direction X facing the battery cell 10, and the fourth surface 21221 can be the surface of the protective part 212 along the first direction X facing away from the battery cell 10.

[0150] The first surface 2111 and the third surface 21211 are located in the same extension plane, which means that the surface of the heat exchanger 21 on one side along the first direction X is a flat surface. The second surface 2112 and the fourth surface 21221 are located in the same extension plane, which means that the surface of the heat exchanger 21 on the other side along the first direction X is a flat surface. By arranging in the above manner, the heat exchange element 21 can be arranged more flat, which is convenient for processing and assembly, and can also reduce the occupied space.

[0151] In some optional embodiments, the heat exchange body 211 and the protection portion 212 are an integrated structure.

[0152] The above-mentioned arrangement is beneficial to improving the processing efficiency of the heat exchange element 21 and can also improve the connection strength between the heat exchange body and the protective portion 212, thereby improving the structural strength of the heat exchange element 21 and further improving the reliability of the thermal management component 20 and the battery device 1.

[0153] like Figure 6 and Figure 8 As shown, in some optional embodiments, the second chamber 202 is provided with a plurality of heating elements 22 .

[0154] This arrangement is helpful to improve the heat exchange efficiency between the thermal management component 20 and the battery cell 10 , thereby better improving the performance of the battery device 1 .

[0155] Optionally, each heating element 22 may be entirely disposed in the second cavity 202 , or each heating element 22 may have a portion disposed in the second cavity 202 .

[0156] In some optional embodiments, the battery device 1 further includes a first heat-conducting structure, which is disposed in the second cavity 202 , and the heating element 22 is connected to the heat exchange element 21 via the first heat-conducting structure.

[0157] The heating element 22 is connected to the heat exchange element 21 via the first heat conducting structure, wherein the heating element 22 can be bonded to the heat exchange element 21 via the first heat conducting structure, or the heating element 22 can be abutted to the heat exchange element 21 via the first heat conducting structure.

[0158] The first heat-conducting structure is used to improve the heat conductivity between the heating element 22 and the heat exchange element 21, so as to improve the heat conductivity between the heating element 22 and the heat exchange medium in the first cavity 201 of the heat exchange element 21. The first heat-conducting structure can also improve the heat conductivity between the heating element 22 and the heat exchange element 21, which is beneficial to the heat dissipation of the heating element 22 itself, and reduces the risk of dry burning of the heating element 22, thereby helping to improve the reliability and service life of the thermal management component 20 and the battery device 1. In addition, the heat of the heating element 22 can also be transferred to the heat exchange element 21 and the heat exchange medium in the first cavity 201 of the heat exchange element 21 more quickly through the first heat-conducting structure, which is also beneficial to improve the heat conductivity of the heat exchange element 21 to the battery cell 10, so that the battery cell 10 can quickly heat up at low temperature, thereby improving the performance and service life of the battery device 1.

[0159] Furthermore, the first heat-conducting structure also at least partially separates the heating element 22 from the heat exchange element 21 , thereby reducing the risk of contact and collision between the heating element 22 and the heat exchange element 21 , and improving the reliability of the thermal management component 20 and the battery device 1 .

[0160] The first heat-conducting structure can also ensure the reliability of the relative position between the heating element 22 and the heat exchange element 21 to prevent the heating element 22 from being displaced in the second cavity 202 .

[0161] The battery device 1 provided in some embodiments of the present application, by providing a first heat-conducting structure, is beneficial to improving the heating efficiency of the heating element 22 on the heat exchange element 21 and the heat exchange medium located in the second cavity 202, thereby further improving the heat exchange efficiency between the thermal management component 20 and the battery cell 10.

[0162] Optionally, the first heat-conducting structure includes heat-conducting glue, which can protect the heating element 22. The heat-conducting glue can be disposed on at least one of the heating element 22 and the heat exchange element 21 by immersion or coating.

[0163] The thermal conductive adhesive can not only effectively conduct the heat of the heating element 22, but also play a role in bonding and fixing, ensuring that the heating element 22 and the heat exchange element 21 maintain a stable connection in an environment of vibration or temperature changes. The thermal conductive adhesive can also reduce thermal resistance, which helps to reduce the resistance in the heat conduction path from the heating element 22 to the heat exchange element 21, thereby improving the thermal conduction efficiency.

[0164] The first heat-conducting structure may include but is not limited to any one of thermally conductive silicone grease, epoxy resin glue, and two-component polyurethane thermally conductive glue.

[0165] The thermal management component 20 may be disposed on a side of the box body 30 facing the battery cell 10 , or may be disposed on a side of the box body 30 facing away from the battery cell 10 .

[0166] See also Figure 4 In some optional embodiments, the battery device 1 further includes a box body 30 , the box body 30 has a receiving cavity 301 , and the battery cell 10 is disposed in the receiving cavity 301 .

[0167] The box body 30 is used to accommodate the battery cells 10 to protect them.

[0168] In some optional embodiments, the thermal management component 20 is disposed on a side of the box body 30 along the first direction X facing away from the battery cell 10 .

[0169] The thermal management component 20 can be arranged outside the box body 30 to exchange heat with the battery cell 10, which is convenient for processing and assembly of the battery device 1, helps to reduce the manufacturing difficulty, and also facilitates the replacement and maintenance of the thermal management component 20.

[0170] As an example, the box body 30 may include a frame 31 and a top wall 32. The frame 31 is arranged to form a accommodating cavity 301. The top wall 32 is connected to one side of the frame 31 along the first direction X. The thermal management component 20 is connected to the other side of the frame 31 along the first direction X. Under this structure, the thermal management component 20 can also be used as a part of the box body 30 to protect the battery cell 10, which is beneficial to saving materials and reducing costs.

[0171] As an example, the box body 30 may also include a bottom wall 33 connected to the other side of the frame 31 along the first direction X. The top wall 32, the frame 31 and the bottom wall 33 enclose a accommodating cavity 301. The thermal management component 20 is connected to the side of the bottom wall 33 that is away from the top wall 32 along the first direction X. This arrangement is beneficial to improving the structural strength of the box body 30, thereby improving the reliability of the battery device 1.

[0172] like Figure 4 As shown, in some optional embodiments, the battery device 1 also includes a protective plate 40. Along the first direction X, the protective plate 40 is arranged on the side of the thermal management component 20 facing away from the top wall 32 to protect the thermal management component 20, which is beneficial to improving the reliability of the thermal management component 20 and the battery device 1.

[0173] By configuring in the above manner, interference between the heating element 22 and the box body 30 can be avoided, which is beneficial to improving the reliability of the heating element 22 and thus beneficial to improving the reliability of the thermal management component 20 and the battery device 1 .

[0174] In some embodiments, the box 30 may include a first box and a second box. The first box and the second box are buckled to form a receiving cavity 301, so that a closed space is formed inside the box 30 to accommodate the battery cell 10. The closed space here means covering or closing, which can be sealed or unsealed.

[0175] Optionally, the first box body and the second box body may both be configured as a cylindrical structure with an opening, or one of the first box body and the second box body may be configured as a plate-like structure, and the other may be configured as a cylindrical structure with an opening.

[0176] In some optional embodiments, the thermal management component 20 is disposed in the accommodating cavity 301 .

[0177] The thermal management component 20 may also be disposed in the accommodating cavity 301 to exchange heat with the battery cell 10 . The above arrangement is helpful to improve the flexibility of use of the battery device 1 .

[0178] In some optional embodiments, the battery device 1 further includes a second heat-conducting structure, which is disposed between the thermal management component 20 and the housing 30 , and the thermal management component 20 is connected to the housing 30 via the second heat-conducting structure.

[0179] Exemplarily, the second heat-conducting structure is disposed between the thermal management component 20 and the bottom wall 33 .

[0180] The second heat-conducting structure is used to improve the heat conduction capacity between the thermal management component 20 and the box body 30, so as to improve the heat conduction capacity between the thermal management component 20 and the battery cell 10 accommodated in the accommodating cavity 301 of the box body 30, and it is also helpful to improve the heating efficiency of the box body 30 by the thermal management component 20. The box body 30 can transfer heat to the battery cell 10 adjacent thereto, so that the temperature of the battery cell 10 can be increased more quickly. In addition, it is also helpful to improve the connection strength between the thermal management component 20 and the box body 30, so as to improve the reliability of the battery device 1.

[0181] The second heat-conducting structure may be made of the same material as the first heat-conducting structure, or may be made of different materials.

[0182] Please also read Figures 5 to 10 According to some embodiments of the present application, the present application also provides a thermal management component 20, including a heat exchanger 21 and a heating element 22. The heat exchanger 21 has a first cavity 201 and a second cavity 202 that are isolated from each other, and the first cavity 201 is configured to allow a heat exchange medium to flow. The heating element 22 is at least partially disposed in the second cavity 202. Among them, in a direction perpendicular to the extension direction of the first cavity 201, at least one side of the first cavity 201 is provided with a second cavity 202. In a projection plane perpendicular to the first direction X, the orthographic projection of the first cavity 201 is a curved structure, and the orthographic projection of the second cavity 202 is a curved structure, and along a direction perpendicular to the extension direction of the first cavity 201, and along a direction perpendicular to the first direction X, at least one side of the first cavity 201 is provided with a second cavity 202.

[0183] The first direction X refers to the thickness direction of the thermal management assembly 20 .

[0184] The thermal management component 20 includes a heat exchanger 21 and a heating element 22. The heat exchanger 21 is provided with a first cavity 201 and a second cavity 202 which are isolated from each other. The first cavity 201 is used for the flow of heat exchange medium, and the second cavity 202 is used for placing the heating element 22. By setting the first cavity 201 and the second cavity 202 as a curved structure, it is beneficial to increase the arrangement area of ​​the first cavity 201 and the second cavity 202 on the heat exchanger 21, so that the first cavity 201 can accommodate more heat exchange medium, and the area of ​​the heating element 22 placed in the second cavity 202 can be larger, which is beneficial to improve the thermal management efficiency of the thermal management component 20. In addition, the heat exchanger 21 can also protect the heating element 22 to avoid the phenomenon that the heating element 22 is scratched or crushed during the assembly process, thereby improving the reliability of the thermal management component 20. In addition, by setting the second cavity 202 on the side of the first cavity 201, the space occupied by the heat exchanger 21 in the first direction X can be reduced, which is beneficial to improve the space utilization rate of the thermal management component.

[0185] According to some embodiments of the present application, the present application further provides an electrical device, the electrical device includes the battery device 1 provided in any of the above embodiments, or the electrical device includes the thermal management component 20 provided in any of the above embodiments.

[0186] The battery device 1 is used to store or provide electrical energy, and the thermal management component 20 is used to dissipate heat, cool down or heat electrical components in the electrical equipment.

[0187] 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.

[0188] Please also read Figures 4 to 10 According to some embodiments of the present application, the present application provides a battery device 1, including a plurality of battery cells 10, a thermal management component 20, a first heat-conducting structure, a box body 30 and a second heat-conducting structure.

[0189] The box body 30 has a receiving cavity 301, and a plurality of battery cells 10 are disposed in the receiving cavity 301. The thermal management assembly 20 is disposed on a side of the box body 30 that is away from the battery cells 10 along the first direction X, and the second heat-conducting structure is disposed between the heat exchange element 21 and the box body 30, and the heat exchange element 21 is connected to the box body 30 through the second heat-conducting structure.

[0190] The thermal management component 20 includes a heat exchange element 21 and a heating element 22. The heat exchange element 21 has a first cavity 201 and a second cavity 202 isolated from each other. The first cavity 201 is configured for the flow of heat exchange medium. The second cavity 202 is provided with a plurality of heating elements 22. At least a portion of each heating element 22 is disposed in the second cavity 202. A first heat-conducting structure is disposed in the second cavity 202. The heating element 22 is connected to the heat exchange element 21 via the first heat-conducting structure.

[0191] The first cavity 201 is a strip-shaped structure, and the second cavity 202 is a strip-shaped structure. The second cavity 202 is provided on both sides of the first cavity 201 along the direction perpendicular to the extension direction of the first cavity 201 and the first direction X. In the projection plane perpendicular to the first direction X, the orthographic projection of the first cavity 201 is a curved structure, the orthographic projection of the second cavity 202 is a curved structure, and the orthographic projection of the heat exchange element 21 is a curved structure.

[0192] The heat exchange element 21 includes a heat exchange body 211 and a protection part 212 connected to each other, and the heat exchange body 211 and the protection part 212 are an integrated structure. The heat exchange body 211 has a first cavity 201, and the protection part 212 includes a first wall 2121, a second wall 2122 and a third wall 2123 connected between the first wall 2121 and the second wall 2122, which are arranged relatively along the first direction X. The first wall 2121 and the second wall 2122 are respectively connected to the heat exchange body 211, and the third wall 2123 is spaced apart from the heat exchange body 211. The wall of the heat exchange body 211 arranged toward the protection part 212 and the first wall 2121, the second wall 2122 and the third wall 2123 form a second cavity 202.

[0193] In the first direction X, the heat exchange body 211 has a first surface 2111 and a second surface 2112 located on opposite sides, the first wall 2121 has a third surface 21211 facing away from the second wall 2122, the second wall 2122 has a fourth surface 21221 facing away from the first wall 2121, the first surface 2111 and the third surface 21211 are located in the same extension plane, and the second surface 2112 and the fourth surface 21221 are located in the same extension plane.

[0194] The heat exchange member 21 has a first opening 2031 in communication with the second cavity 202, and along the extension direction of the second cavity 202, both sides of the second cavity 202 are provided with the first opening 2031. And / or, the heat exchange member 21 has a second opening 2032 in communication with the second cavity 202, the second opening 2032 is a strip-shaped structure, the extension direction of the second opening 2032 is the same as the extension direction of the second cavity 202, the third wall 2123 is provided with the second opening 2032, and the size of the second opening 2032 in the first direction X is L, 2mm≤L≤5mm.

[0195] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0196] 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 it. 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 make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery device, characterized in that: include: Multiple battery cells; A thermal management component is arranged on the same side of the plurality of battery cells along the first direction, the thermal management component comprises a heat exchange element and a heating element, the heat exchange element has a first cavity and a second cavity isolated from each other, the first cavity is configured to allow a heat exchange medium to flow, and the heating element is at least partially arranged in the second cavity; Among them, in the projection plane perpendicular to the first direction, the orthographic projection of the first cavity is a curved structure, and the orthographic projection of the second cavity is a curved structure; along the direction perpendicular to the extension direction of the first cavity, and along the direction perpendicular to the first direction, the second cavity is provided on at least one side of the first cavity.

2. The battery device according to claim 1, characterized in that: In a projection plane perpendicular to the first direction, the orthographic projection of the heat exchange element is a curved structure.

3. The battery device according to claim 1 or 2, characterized in that: The heat exchange element has an opening communicating with the second chamber.

4. The battery device according to claim 3, characterized in that: The opening includes a first opening. Along the extension direction of the second cavity, at least one side of the second cavity is provided with the first opening.

5. The battery device according to claim 3, characterized in that: The opening includes a second opening, the second opening is a strip-shaped structure, and an extending direction of the second opening is the same as an extending direction of the second cavity; In the direction from the first cavity to the second cavity, the second opening is provided on the side of the heat exchange element facing away from the first cavity; and / or, the second opening is provided on at least one of the opposite sides of the heat exchange element along the first direction.

6. The battery device according to claim 5, characterized in that: The heat exchange element has a first section and a second section that are spaced apart. The second opening is located between the first section and the second section, and points from the first section to the second section. The size of the second opening is L, where 1 mm ≤ L ≤ 10 mm.

7. The battery device according to claim 6, characterized in that: 2mm≤L≤5mm.

8. The battery device according to claim 1 or 2, characterized in that: The heat exchange element includes a heat exchange body and a protective part that are interconnected, the heat exchange body has the first cavity, the protective part includes a first wall and a second wall, at least one of the first wall and the second wall is connected to the heat exchange body, and the wall of the heat exchange body arranged toward the protective part is enclosed by the first wall and the second wall to form the second cavity.

9. The battery device according to claim 8, characterized in that: The first wall and the second wall are both connected to the heat exchange body, and the first wall and the second wall are spaced apart along the first direction.

10. The battery device according to claim 9, characterized in that: The protection part also includes a third wall, which is connected between the first wall and the second wall and is spaced apart from the heat exchange body. The wall of the heat exchange body arranged toward the protection part is surrounded by the first wall, the second wall and the third wall to form the second cavity.

11. The battery device according to claim 9, characterized in that: In the first direction, the heat exchange body has a first surface and a second surface located on opposite sides, the first wall has a third surface facing away from the second wall, and the second wall has a fourth surface facing away from the first wall; the first surface and the third surface are located in the same extension plane, and / or the second surface and the fourth surface are located in the same extension plane.

12. The battery device according to claim 8, characterized in that: The heat exchange body and the protection part are an integrated structure.

13. The battery device according to claim 1 or 2, characterized in that: The second chamber is provided with a plurality of the heating elements.

14. The battery device according to claim 1 or 2, characterized in that: The battery device further includes a first heat-conducting structure, which is disposed in the second cavity, and the heating element is connected to the heat exchange element via the first heat-conducting structure.

15. The battery device according to claim 1 or 2, characterized in that: The battery device further comprises a box body, the box body having a receiving cavity, and the battery cell is arranged in the receiving cavity; The thermal management component is disposed on a side of the box body facing away from the battery cell along the first direction; and / or the thermal management component is disposed in the accommodating cavity.

16. The battery device according to claim 15, characterized in that: The battery device further includes a second heat-conducting structure, which is disposed between the thermal management component and the housing, and the thermal management component is connected to the housing via the second heat-conducting structure.

17. A thermal management component, characterized in that: include: A heat exchange element having a first chamber and a second chamber isolated from each other, wherein the first chamber is configured to allow a heat exchange medium to flow; a heating element, wherein the heating element is at least partially disposed in the second cavity; Among them, in the projection plane perpendicular to the first direction, the orthographic projection of the first cavity is a curved structure, and the orthographic projection of the second cavity is a curved structure; along the direction perpendicular to the extension direction of the first cavity, and along the direction perpendicular to the first direction, the second cavity is provided on at least one side of the first cavity.

18. An electrical equipment, characterized in that: The electrical equipment comprises the battery device according to any one of claims 1 to 16, or the electrical equipment comprises the thermal management component according to claim 17.

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