Battery device and electric device

Abstract

The utility model provides a battery device and an electric device. The battery device comprises a box body, a battery monomer assembly and a heat exchange plate, the box body comprises a frame body. The battery monomer assembly is arranged in the frame body; the battery cell assembly includes a plurality of battery cells arranged side by side in a first direction. The battery cell includes a case and an electrode terminal. The housing includes a first wall. In the second direction, the first wall faces the box body. The first direction is perpendicular to the second direction. The electrode terminal is arranged on the first wall. And the heat exchange plate is arranged in the box body. And the heat exchange plate is connected with the frame body. And at least part of the heat exchange plate is arranged between the first wall and the box body. The heat exchange plate is connected to the first wall. In the second direction, the orthographic projection of the heat exchange plate and the orthographic projection of the first wall have an overlapping area, and the orthographic projection of the heat exchange plate and the orthographic projection of the electrode terminal are arranged at an interval.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become a crucial component of this sustainable development. Battery technology is a crucial factor in the development of electric vehicles. Improving battery performance has long been a key research topic in this area. Utility Model Content

[0003] The present application provides a battery device and an electrical device, which are conducive to the battery device having good performance.

[0004] The present application provides a battery device, which includes a box, a battery cell assembly and a heat exchange plate.

[0005] The housing includes a frame. A battery cell assembly is disposed within the frame. The battery cell assembly includes a plurality of battery cells arranged side by side along a first direction. The battery cells include a housing and electrode terminals. The housing includes a first wall. The first wall faces the housing along a second direction. The first direction is perpendicular to the second direction. The electrode terminals are disposed on the first wall.

[0006] The heat exchange plate is disposed within the housing. The heat exchange plate is connected to the housing. At least a portion of the heat exchange plate is disposed between the first wall and the housing. The heat exchange plate is connected to the first wall. Along the second direction, the orthographic projection of the heat exchange plate overlaps with the orthographic projection of the first wall, and the orthographic projection of the heat exchange plate is spaced apart from the orthographic projection of the electrode terminal.

[0007] In the battery device of the embodiment of the present application, the heat exchange plate can be arranged between the battery cell assembly and the housing to reuse the space between the housing and the battery cell assembly, which is beneficial to improving the space utilization rate within the housing. At the same time, the heat exchange plate does not occupy the space within the battery cell assembly used to arrange the battery cells, which is beneficial to ensuring that the battery cell assembly includes a large number of battery cells and reducing the possibility of the number of battery cells included in the battery cell assembly being reduced due to the heat exchange plate occupying the arrangement space. This is beneficial to improving the overall power of the battery device and ensuring that the battery device has good endurance performance. The frame can provide protection for the battery cell assembly in the circumferential direction of the battery cell assembly, reducing the possibility of damage to the battery cell assembly due to squeezing or impact, which is beneficial to improving the safety of the battery device.

[0008] In some feasible embodiments, the box includes a first plate and a second plate. The first plate and the second plate are arranged opposite to each other along the second direction. The battery cell assembly is arranged between the first plate and the second plate, and the first wall is arranged facing the second plate.

[0009] The first and second plates protect the battery cell assembly from both sides, reducing the possibility of damage to the battery cell assembly from squeezing or impact, thereby improving the safety of the battery device. The second plate also protects the heat exchange plate, reducing the possibility of damage from squeezing or impact.

[0010] In some possible implementations, the first plate and the second plate are respectively connected to the frame.

[0011] The frame, first plate, and second plate are connected to form a storage space. The battery cell assembly and heat exchange plate are disposed within this storage space. The frame provides circumferential protection for the battery cell assembly, reducing the likelihood of damage from squeezing or impact, thereby improving the safety of the battery device.

[0012] In some achievable embodiments, the frame includes a connected frame and a limiting beam. Along the first direction, the limiting beam is provided between the battery cell assembly and the frame, and the heat exchange plate is connected to the limiting beam.

[0013] During the charging and discharging process of the battery device, the battery cells may expand or contract in volume in a first direction. When the battery cells expand in the first direction, they can compress the limiting beams, which absorb the expansion force, thereby reducing the possibility of the expansion force generated by the battery cells directly acting on the frame and causing frame deformation.

[0014] In some feasible embodiments, the heat exchange plate is bonded to the first wall.

[0015] There is no air gap between the heat exchange plate and the first wall, so as to reduce heat conduction resistance, which is conducive to ensuring good heat exchange efficiency and heat exchange effect between the heat exchange plate and the first wall.

[0016] In some possible implementations, along the second direction, the electrode terminal protrudes from the first wall, and the electrode terminal protrudes from a surface of the heat exchange plate facing the battery cell assembly.

[0017] The electrode terminals protrude from the surface of the heat exchange plate facing the battery cell assembly, so that the electrode terminals and the heat exchange plate can be spatially reused, which is beneficial to improving the space utilization of the box and reducing the thickness of the box in the second direction.

[0018] In some possible implementations, the battery cell includes an electrode assembly, which is disposed in a shell and connected to an electrode terminal. Along the second direction, the orthographic projection of the heat exchange plate and the orthographic projection of the electrode assembly have an overlapping area.

[0019] The orthographic projection of the heat exchange plate and the orthographic projection of the electrode assembly have an overlapping area, which is conducive to shortening the heat conduction path between the heat exchange plate and the electrode assembly, thereby improving the heat exchange efficiency between the battery cell and the heat exchange plate.

[0020] In some possible implementations, the battery device further includes a buffer member, and the buffer member is disposed between the heat exchange plate and the box along the second direction.

[0021] When the battery device is subjected to impact or vibration, the buffer absorbs the vibration energy, reducing the possibility of structural damage to the heat exchanger plates due to compression or collision between the heat exchanger plates and the housing, thereby extending the service life of the heat exchanger plates. The buffer can cover all heat exchanger plates to provide effective protection.

[0022] In some feasible embodiments, the number of battery cell assemblies is the same as the number of heat exchange plates, a heat exchange plate is correspondingly arranged between each battery cell assembly and the box body, the battery cell includes two electrode terminals arranged at intervals along a third direction, the first direction, the second direction and the third direction are perpendicular to each other, and the two electrode terminals of any battery cell in the battery cell assembly are respectively arranged on both sides of the corresponding heat exchange plate along the third direction.

[0023] The arrangement in which the number of battery cell assemblies is the same as the number of heat exchange plates is conducive to each heat exchange plate independently exchanging heat for the corresponding battery cell assembly, which is conducive to meeting thermal management requirements.

[0024] In some feasible embodiments, the battery cell includes a pressure relief portion, which is arranged on the first wall. Along the third direction, the pressure relief portion is located between the two electrode terminals. The heat exchange plate includes a first opening. Along the second direction, the first opening is arranged corresponding to the pressure relief portion.

[0025] In the event of thermal runaway in a battery cell, the pressure relief portion can open to release the internal pressure of the battery cell. The first opening of the heat exchange plate avoids the pressure relief portion, allowing for smooth venting with relatively little resistance. This reduces the possibility of venting being blocked by the heat exchange plate, thereby improving the safety of the battery device.

[0026] In some feasible embodiments, the battery device includes more than two heat exchange plates, and the two or more heat exchange plates are arranged at intervals along a third direction. The battery cell includes two electrode terminals arranged at intervals along the third direction. The first direction, the second direction and the third direction are perpendicular to each other. Along the third direction, the two electrode terminals of any battery cell in the battery cell assembly are located between two adjacent heat exchange plates.

[0027] The heat exchange plate can heat or cool the battery cells through the outer area, which facilitates the thermal management control of the entire battery cell assembly, and helps reduce the possibility of local high or low temperatures in the battery cells due to overheating or overcooling in the outer area, which helps to improve the overall temperature balance of the battery cells.

[0028] In some feasible embodiments, more than two battery cell assemblies are arranged along a third direction, and more than three heat exchange plates are arranged at intervals along the third direction. Along the third direction, the two outermost heat exchange plates correspond to one battery cell assembly respectively, and each of the remaining heat exchange plates corresponds to two adjacent battery cell assemblies.

[0029] For a shared heat exchange plate, heat can be exchanged simultaneously on battery cells in adjacent battery cell assemblies, which is beneficial to improving the utilization rate of the heat exchange plate and reducing the difficulty of arranging the heat exchange plate.

[0030] In some achievable embodiments, two heat exchange plates are correspondingly provided between each battery cell assembly and the box.

[0031] The two heat exchange plates can exchange heat for the same battery cell through the two outer areas respectively, which is beneficial to improving the heat exchange efficiency and heat exchange effect.

[0032] In some possible implementations, the battery device includes a heat exchange plate and two or more battery cell assemblies, and the two or more battery cell assemblies are arranged corresponding to one heat exchange plate.

[0033] A single heat exchange plate can simultaneously exchange heat between multiple battery cells, improving plate utilization. A relatively large heat exchange plate can be placed between the housing and the battery cell assembly, improving space utilization between the housing and the battery cell assembly.

[0034] In some feasible embodiments, the battery cell includes a pressure relief portion and two electrode terminals spaced apart along a third direction, the first direction, the second direction and the third direction are perpendicular to each other, the pressure relief portion is arranged on the first wall, the heat exchange plate includes a first opening and a second opening, and along the second direction, the first opening is arranged corresponding to the pressure relief portion, and the second opening is arranged corresponding to the electrode terminal.

[0035] In the event of thermal runaway in a battery cell, the pressure relief portion can open to release the internal pressure of the battery cell. The first opening of the heat exchange plate avoids the pressure relief portion, allowing for smooth venting with relatively little resistance. This reduces the possibility of venting being blocked by the heat exchange plate, thereby improving the safety of the battery device.

[0036] In some possible implementations, along the second direction, the electrode terminal passes through the second opening and exceeds the opening of the second opening.

[0037] The electrode terminal is passed through the second opening and exceeds the opening of the second opening, so that the electrode terminal and the heat exchange plate can be spatially reused, which is beneficial to improving the space utilization of the box and reducing the thickness of the box in the second direction.

[0038] The embodiment of the present application provides an electrical device, which includes the above-mentioned battery device. The battery device is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0040] Figure 1 is a schematic diagram of a partial structure of a vehicle provided in one embodiment of the present application;

[0041] Figure 2 is a schematic diagram of a partially exploded structure of a battery device provided in one embodiment of the present application;

[0042] Figure 3 This is a schematic structural diagram of a battery cell assembly provided in one embodiment of the application;

[0043] Figure 4 This is a schematic diagram of the partial structure of a battery cell provided in one embodiment of the present application;

[0044] Figure 5 is a schematic diagram of a partial cross-sectional structure of a battery cell provided in one embodiment of the present application;

[0045] Figure 6 This is a schematic diagram of a partial structure of a battery device provided in one embodiment of the present application;

[0046] Figure 7 This is a schematic diagram of the partial structure of a heat exchange plate provided in one embodiment of the present application;

[0047] Figure 8 is a schematic diagram of a partial cross-sectional structure of a battery device provided in one embodiment of the present application;

[0048] Figure 9 is a schematic diagram of a partial cross-sectional structure of a battery device provided in one embodiment of the present application;

[0049] Figure 10 This is a schematic diagram of a partial structure of a battery device provided in one embodiment of the present application;

[0050] Figure 11is a schematic diagram of a partially exploded structure of a battery device provided in one embodiment of the present application;

[0051] Figure 12 This is a schematic diagram of a partial structure of a battery device provided in one embodiment of the present application;

[0052] Figure 13 yes Figure 6 The enlarged schematic diagram of the M in the middle;

[0053] Figure 14 This is a schematic diagram of a partial structure of a battery device provided in one embodiment of the present application;

[0054] Figure 15 This is a schematic diagram of the partial structure of a battery cell provided in one embodiment of the present application;

[0055] Figure 16 yes Figure 14 The enlarged schematic diagram of P in the middle;

[0056] Figure 17 This is a schematic diagram of a partial structure of a battery device provided in one embodiment of the present application;

[0057] Figure 18 This is a schematic diagram of a partial structure of a battery device provided in one embodiment of the present application;

[0058] Figure 19 This is a schematic diagram of the partial structure of a heat exchange plate provided in one embodiment of the present application;

[0059] Figure 20 yes Figure 18 Enlarged schematic diagram of V in the middle;

[0060] Figure 21 yes Figure 19 Enlarged schematic diagram of T in the middle;

[0061] Figure 22 This is a schematic diagram of a partial structure of a battery device provided in one embodiment of the present application;

[0062] Figure 23 yes Figure 22 Enlarged schematic diagram of the U in the middle.

[0063] Description of reference numerals:

[0064] 1. Vehicle; 10. Battery device; 11. Controller; 12. Motor; 20. Housing; 21. First plate; 22. Second plate; 23. Frame; 231. Frame; 232. Limiting beam; 30. Battery cell assembly; 40. Battery cell; 50. Housing; 51. First wall; 511. Inner area; 512. Outer area; 52. Second wall; 60. Electrode terminal; 70. Electrode assembly; 80. Heat exchange plate; 81. First opening; 82. Second opening; 83. First recess; 84. Second recess; 90. Buffer; 100. Pressure relief portion; 110. Converging component; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0065] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0066] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0067] 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. Therefore, they should not be understood as limiting the embodiments of the present application.

[0068] In addition, the technical terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0069] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0070] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0071] Currently, market developments indicate that battery applications are becoming increasingly widespread. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing.

[0072] In this application, battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, and the embodiments of this application are not limited thereto. Battery cells may be flat, rectangular, or in other shapes, and the embodiments of this application are not limited thereto.

[0073] A battery cell consists of an electrode assembly. This assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets.

[0074] The battery device referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. The battery device referred to in this application may be a battery pack. For example, the battery device referred to in this application may include a battery cell assembly. A battery device generally includes a housing for enclosing one or more battery cell assemblies. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0075] A battery cell assembly includes multiple battery cells arranged side by side. The large surface of one adjacent battery cell is aligned with the large surface of the other. The battery assembly includes a heat exchange plate. This plate is positioned between the large surfaces of the adjacent battery cells. This plate exchanges heat with the battery cells, stabilizing the battery assembly and extending the battery cell life. However, the heat exchange plate occupies space in the direction of the battery cell arrangement, reducing the number of battery cells in the battery cell assembly. This reduces the overall charge level of the battery assembly and impacts the battery unit's battery life.

[0076] In order to alleviate the problem of the heat exchange plate occupying the layout space, the layout of the heat exchange plate can be adjusted, and the heat exchange plate can be set between the box body and the battery cell assembly.

[0077] Based on the above considerations, and to alleviate the issue of heat exchange plates occupying layout space, the inventors, after in-depth research, designed a battery device. In this battery device, a heat exchange plate is placed between the housing and the battery cell assembly. This ensures that the heat exchange plate does not occupy the layout space of the battery cells in the direction of arrangement of the battery cells. This reduces the possibility of the heat exchange plate occupying layout space and thus reducing the number of battery cells included in the battery cell assembly. This helps to increase the overall power of the battery device and ensures that the battery device has good battery life. The battery device of the present embodiment can effectively achieve a balance between heat exchange efficiency and power consumption.

[0078] The technical solutions described in the embodiments of the present application are applicable to battery devices and electrical devices using battery devices.

[0079] The electrical device may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle 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. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0080] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the battery devices and electrical devices described above, but can also be applied to all battery devices including a box and electrical devices using the battery devices. However, for the sake of simplicity, the following embodiments are explained using electric vehicles as an example.

[0081] See also Figure 1 As shown, vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. A battery device 10 is provided inside vehicle 1. Battery device 10 can be provided at the bottom, head or tail of vehicle 1. Battery device 10 can be used to power vehicle 1. For example, battery device 10 can serve as an operating power source for vehicle 1. Vehicle 1 can also include a controller 11 and a motor 12. Controller 11 is used to control battery device 10 to power motor 12. For example, it is used for starting, navigating and operating power requirements of vehicle 1 during driving.

[0082] In some embodiments of the present application, the battery device 10 can serve not only as an operating power source for the vehicle 1 , but also as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0083] In order to meet different power requirements, the battery device 10 may include multiple battery cells. A battery cell refers to the smallest unit that constitutes a battery cell assembly or a battery pack. Multiple battery cells can be connected in series and / or in parallel via electrode terminals for use in various applications. Among them, multiple battery cells can be connected in series, in parallel, or in hybrid. Hybrid refers to a mixture of series and parallel connections. In the embodiments of the present application, multiple battery cells can form a battery cell assembly, and the battery cell assembly can then form a battery pack.

[0084] See also Figure 2 and Figure 3 As shown, the battery device 10 includes a housing 20 and a battery cell assembly 30 . The battery cell assembly 30 is disposed in the housing 20 .

[0085] The material of the box body 20 can be an alloy material such as aluminum alloy, iron alloy, etc., or a polymer material such as polycarbonate, polyisocyanurate foam plastic, or a composite material such as glass fiber and epoxy resin, which is not limited in the embodiment of the present application.

[0086] In the battery device 10 , a plurality of battery cells 40 may also be connected in series, in parallel, or in mixed series to form a battery cell assembly 30 .

[0087] The multiple battery cells 40 in the battery cell assembly 30 can be electrically connected via the busbar component 110 to achieve parallel connection, series connection, or mixed connection of the multiple battery cells 40 in the battery cell assembly 30 .

[0088] In the embodiment of the present application, the battery cell 40 may be flat, rectangular, or in other shapes, and the embodiment of the present application is not limited thereto. However, for the sake of simplicity, the following embodiment will be described using a rectangular battery cell 40 as an example.

[0089] The battery cell 40 is the smallest unit constituting the battery device 10. Figure 4 and Figure 5 As shown, the battery cell 40 includes a housing 50 , an electrode terminal 60 and an electrode assembly 70 .

[0090] The housing 50 can be made of a material with a certain degree of hardness and strength (such as aluminum alloy). This prevents the housing 50 from deforming when subjected to compression or collision, thus providing the battery cell 40 with greater structural strength and improved safety. The housing 50 includes a first wall 51. Functional components such as electrode terminals 60 may be provided on the first wall 51. The electrode terminals 60 can be used to electrically connect to the electrode assembly 70 to output or input electrical energy to or from the battery cell 40. In some embodiments, the first wall 51 may be the top wall of the housing 50.

[0091] In some embodiments, an insulating member (not shown) may be provided inside the first wall 51 to isolate the electrical connection components within the housing 50 from the first wall 51 to reduce the risk of short circuits. For example, the insulating member may be made of plastic, rubber, or the like.

[0092] The electrode assembly 70 is the component where the electrochemical reaction occurs in the battery cell 40. One or more electrode assemblies 70 may be contained within the housing 50. The electrode assembly 70 is primarily formed by winding or stacking positive and negative electrode sheets, and a separator is typically provided between the positive and negative electrode sheets.

[0093] See also Figures 2 to 7 As shown, an embodiment of the present application provides a battery device 10 , which includes a box 20 , a battery cell assembly 30 and a heat exchange plate 80 .

[0094] The housing 20 includes a frame 23. The battery cell assembly 30 is disposed within the frame 23. The battery cell assembly 30 includes a plurality of battery cells 40 arranged side by side along a first direction X. The battery cells 40 include a housing 50 and electrode terminals 60. The housing 50 includes a first wall 51. The first wall 51 faces the housing 20 along a second direction Y. The first direction X is perpendicular to the second direction Y. The electrode terminals 60 are disposed on the first wall 51. A heat exchange plate 80 is disposed within the housing 20. The heat exchange plate 80 is connected to the frame 23. At least a portion of the heat exchange plate 80 is disposed between the first wall 51 and the housing 20. The heat exchange plate 80 is connected to the first wall 51. Along the second direction Y, the orthographic projection of the heat exchange plate 80 and the orthographic projection of the first wall 51 have an overlapping area, and the orthographic projection of the heat exchange plate 80 is spaced apart from the orthographic projection of the electrode terminal 60.

[0095] In the embodiment of the present application, for a single battery cell assembly 30, the first direction X is the same as the arrangement direction of the battery cells 40. The battery cell assembly 30 and the heat exchange plate 80 are stacked along the second direction Y. The overlapping area between the orthographic projection of the heat exchange plate 80 and the orthographic projection of the first wall 51 means that, when viewed along the second direction Y from the side of the heat exchange plate 80 facing away from the battery cell assembly 30, the heat exchange plate 80 can block the first wall 51. The spacing between the orthographic projection of the heat exchange plate 80 and the orthographic projection of the electrode terminal 60 means that, when viewed along the second direction Y from the side of the heat exchange plate 80 facing away from the battery cell assembly 30, the heat exchange plate 80 does not block the electrode terminal 60.

[0096] The battery cells 40 can exchange heat with the heat exchange plate 80 through the first wall 51. When cooling the battery cells 40 is required, the heat generated by the battery cells 40 can be transferred through the first wall 51 to the heat exchange plate 80. The heat exchange plate 80 absorbs the heat and transfers it to the exterior of the battery device 10, thereby cooling the battery cells 40 and facilitating normal and stable operation of the battery cells 40. When heating the battery cells 40 is required, the heat from the heat exchange plate 80 can be transferred to the first wall 51 and then to other areas of the battery cells 40 through the first wall 51, thereby heating the battery cells 40 and facilitating normal and stable operation of the battery cells 40.

[0097] In the embodiment of the present application, the heat exchange medium used in the heat exchange plate 80 may be a fluid medium. For example, the fluid medium may include but is not limited to water.

[0098] In the examples of this application, see Figure 5 As shown, the housing 50 may include a second wall 52. The first wall 51 and the second wall 52 are disposed opposite to each other along the second direction Y. In some embodiments, the first wall 51 may be a top wall of the housing 50. The second wall 52 may be a bottom wall of the housing 50.

[0099] In the battery device 10 of the embodiment of the present application, the heat exchange plate 80 can be disposed between the battery cell assembly 30 and the housing 20 to reuse the space between the housing 20 and the battery cell assembly 30, thereby improving space utilization within the housing 20. Furthermore, the heat exchange plate 80 does not occupy the space within the battery cell assembly 30 used for arranging the battery cells 40, thereby ensuring that the battery cell assembly 30 includes a larger number of battery cells 40 and reducing the possibility that the number of battery cells 40 included in the battery cell assembly 30 would be reduced due to the heat exchange plate 80 occupying the arrangement space. This helps to improve the overall power of the battery device 10, thus ensuring that the battery device 10 has good battery life. The heat exchange plate 80 can achieve heat exchange between the first wall 51 of the battery cell 40 and the battery cell 40, thereby improving the heat exchange efficiency between the heat exchange plate 80 and the battery cell 40. Therefore, the battery device 10 of the embodiment of the present application, by disposing the heat exchange plate 80 between the housing 20 and the battery cell assembly 30 and correspondingly arranging the heat exchange plate 80 to the first wall 51, can achieve a balance between heat exchange efficiency and power consumption in the battery device 10 as a whole. The frame 23 can protect the battery cell assembly 30 in the circumferential direction of the battery cell assembly 30 , thereby reducing the possibility of the battery cell assembly 30 being damaged by being squeezed or impacted, thereby improving the safety of the battery device 10 .

[0100] In some possible implementations, see Figure 2 and Figure 8 As shown, the housing 20 includes a first plate 21 and a second plate 22. The first plate 21 and the second plate 22 are disposed opposite each other along the second direction Y. The battery cell assembly 30 is disposed between the first plate 21 and the second plate 22. The first wall 51 is disposed facing the second plate 22.

[0101] The first plate 21 and the second plate 22 protect the battery cell assembly 30 from both sides, reducing the possibility of damage to the battery cell assembly 30 due to squeezing or impact, thereby improving the safety of the battery device 10. The second plate 22 protects the heat exchange plate 80, reducing the possibility of damage to the heat exchange plate 80 due to squeezing or impact.

[0102] In some examples, the first plate 21 may be a top plate, and the second plate 22 may be a bottom plate. When the battery assembly 10 is used in the vehicle 1, the first plate 21 faces upward, while the second plate 22 faces downward. When the heat exchange plate 80 requires repair or inspection, removing the second plate 22 facilitates repair or inspection of the heat exchange plate 80, reducing the difficulty of repairing or inspecting the heat exchange plate 80 and improving the maintenance convenience of the battery assembly 10.

[0103] In some examples, the second direction Y is the same as the thickness direction of the box body 20. The first plate body 21 and the second plate body 22 are spaced apart from each other along the thickness direction of the box body 20.

[0104] In some possible implementations, see Figure 6 and Figure 8 As shown, the first plate 21 and the second plate 22 are respectively connected to the frame 23 .

[0105] The frame 23, the first plate 21, and the second plate 22 are connected to form a storage space. The battery cell assembly 30 and the heat exchange plate 80 are disposed within this storage space. The frame 23 provides circumferential protection for the battery cell assembly 30, reducing the possibility of damage to the battery cell assembly 30 from compression or impact, thereby improving the safety of the battery device 10.

[0106] In some examples, the first plate 21 and the second plate 22 are both detachably connected to the frame 23. For example, the first plate 21 and the second plate 22 are each detachably connected to the frame 23 via fasteners such as screws.

[0107] In some examples, the first plate 21 and the frame 23 may be integrally formed. The second plate 22 and the frame 23 may be detachably connected. For example, the second plate 22 and the frame 23 may be detachably connected by fasteners such as screws.

[0108] In some possible implementations, see Figure 8 As shown, the frame 23 includes a connected frame 231 and a limiting beam 232. Along the first direction X, the limiting beam 232 is provided between the battery cell assembly 30 and the frame 231. The heat exchange plate 80 is connected to the limiting beam 232. The first plate 21 and the second plate 22 can be connected to the frame 231.

[0109] During the charging and discharging process of the battery device 10 , the battery cells 40 may expand or contract in volume in the first direction X. When the battery cells 40 expand in the first direction X, the battery cells 40 may press against the limiting beams 232 , and the limiting beams 232 may absorb the expansion force, thereby reducing the possibility that the expansion force generated by the battery cells 40 directly acts on the frame 231 and causes deformation of the frame 231 .

[0110] When the battery cell 40 contracts in the first direction X, the limiting beam 232 can rebound and deform to keep the limiting beam 232 and the battery cell 40 in contact, thereby reducing the possibility of the battery cell 40 shaking due to a gap between the battery cell 40 and the frame 23.

[0111] In some examples, the limiting beam 232 is detachably connected to the frame 231. For example, the limiting beam 232 is detachably connected to the frame 231 by fasteners such as screws.

[0112] In some examples, the limiting beam 232 and the frame 231 may be an integrally formed structure.

[0113] In some examples, the frame 23 is a rectangular structure including four frames 231. A limiting beam 232 is provided between two opposing frames 231 along the first direction X. Two opposing ends of the heat exchange plate 80 are connected to the opposing limiting beams 232 along the first direction X.

[0114] In some examples, the heat exchange plate 80 is detachably connected to the limiting beam 232. For example, the heat exchange plate 80 is detachably connected to the limiting beam 232 by fasteners such as screws.

[0115] In some implementations, the heat exchange plate 80 is bonded to the first wall 51. In some examples, thermally conductive adhesive is disposed between the heat exchange plate 80 and the first wall 51. The heat exchange plate 80 and the first wall 51 are bonded and fixed together using the thermally conductive adhesive. Exemplarily, the thermally conductive adhesive includes, but is not limited to, silicone.

[0116] There is no air gap between the heat exchange plate 80 and the first wall 51 to reduce heat conduction resistance, which is beneficial to ensuring good heat exchange efficiency and heat exchange effect between the heat exchange plate 80 and the first wall 51.

[0117] The heat exchange plate 80 and the first wall 51 are bonded together. On the one hand, the heat exchange plate 80 and the first wall 51 do not need to be additionally provided with a connecting structure, which is conducive to reducing the processing difficulty of the heat exchange plate 80 and the first wall 51. On the other hand, no additional connecting parts are required between the heat exchange plate 80 and the first wall 51, which is conducive to reducing the number of parts used and reducing the difficulty of assembling the heat exchange plate 80 and the first wall 51.

[0118] In some possible implementations, see Figure 9 As shown, along the second direction Y, the electrode terminal 60 protrudes from the first wall 51 , and the electrode terminal 60 protrudes from the surface of the heat exchange plate 80 facing the battery cell assembly 30 .

[0119] See also Figure 10 As shown, the multiple battery cells 40 in the battery cell assembly 30 can be electrically connected via the busbar 110 to achieve parallel, series, or mixed connection of the multiple battery cells 40 in the battery cell assembly 30. The protrusion of the electrode terminal 60 from the first wall 51 facilitates the connection between the electrode terminal 60 and the busbar 110, reducing the possibility of a false connection or poor connection between the busbar 110 and the electrode terminal 60 due to positional interference between the busbar 110 and the first wall 51.

[0120] The electrode terminal 60 protrudes from the surface of the heat exchange plate 80 facing the battery cell assembly 30, so that the electrode terminal 60 and the heat exchange plate 80 can be spatially reused, which is beneficial to improving the space utilization of the box 20 and reducing the thickness of the box 20 in the second direction Y.

[0121] In some examples, the busbar component 110 may be a busbar.

[0122] In some possible implementations, see Figure 9 As shown, the battery cell 40 includes an electrode assembly 70. The electrode assembly 70 is disposed in the housing 50. The electrode assembly 70 is connected to the electrode terminal 60. Along the second direction Y, the orthographic projection of the heat exchange plate 80 and the orthographic projection of the electrode assembly 70 have an overlapping area.

[0123] The arrangement of overlapping areas between the orthographic projections of the heat exchange plate 80 and the electrode assembly 70 facilitates shortening the heat conduction path between the heat exchange plate 80 and the electrode assembly 70, thereby improving the heat exchange efficiency between the battery cells 40 and the heat exchange plate 80. The larger the overlapping area between the orthographic projections of the heat exchange plate 80 and the electrode assembly 70, the higher the heat exchange efficiency between the heat exchange plate 80 and the battery cells 40.

[0124] In the battery cell 40 , the electrode assembly 70 is the main heat generating component. The heat generated by the electrode assembly 70 can be transferred to the first wall 51 and then transferred from the first wall 51 to the heat exchange plate 80 , so that the heat exchange plate 80 can cool the electrode assembly 70 .

[0125] When the electrode assembly 70 needs to be heated, the heat of the heat exchange plate 80 can be transferred to the first wall 51 , and then transferred from the first wall 51 to the electrode assembly 70 .

[0126] In some possible implementations, see Figure 11 As shown, the battery device 10 further includes a buffer 90 . Along the second direction Y, the buffer 90 is disposed between the heat exchange plate 80 and the box body 20 .

[0127] When the battery device 10 is subjected to impact or vibration, the buffer 90 can absorb the vibration energy, reducing the possibility of structural damage to the heat exchange plates 80 caused by compression or collision between the heat exchange plates 80 and the housing 20, thereby extending the service life of the heat exchange plates 80. The buffer 90 can cover all heat exchange plates 80 to provide effective protection for the heat exchange plates 80.

[0128] In some examples, the housing 20 includes a second plate 22 . A buffer 90 is provided between the second plate 22 and the heat exchange plate 80 .

[0129] In some examples, the buffer member 90 may be bonded to the housing 20 . Alternatively, the buffer member 90 may be bonded to the heat exchange plate 80 .

[0130] In some examples, the buffer member 90 may be an insulating member. For example, the buffer member 90 may include but is not limited to foam.

[0131] In some possible implementations, see Figure 6 and Figure 12 As shown, the number of battery cell assemblies 30 is equal to the number of heat exchange plates 80. A corresponding heat exchange plate 80 is disposed between each battery cell assembly 30 and the housing 20. The battery cell 40 includes two electrode terminals 60 spaced apart along a third direction Z. The first direction X, the second direction Y, and the third direction Z are mutually perpendicular. The two electrode terminals 60 of any battery cell 40 in the battery cell assembly 30 are disposed along the third direction Z on either side of the corresponding heat exchange plate 80.

[0132] For some examples, see Figure 4 、 Figure 9 and Figure 10 As shown, the first wall 51 includes an inner region 511 between the two electrode terminals 60 and an outer region 512 located outside the electrode terminals 60. The outer region 512 located outside the electrode terminals 60 refers to the shoulder of the battery cell 40. Along the second direction Y, the heat exchange plate 80 is arranged corresponding to the inner region 511 of the first wall 51.

[0133] Exemplarily, the heat exchange plate 80 is bonded to the inner region 511 of the first wall 51 .

[0134] In some examples, a battery cell assembly 30 and a heat exchange plate 80 may be disposed in the housing 20. A battery cell assembly 30 includes a plurality of battery cells 40. A heat exchange plate 80 is disposed between the battery cell assembly 30 and the housing 20.

[0135] For some examples, see Figure 12 As shown, at least two battery cell assemblies 30 and at least two heat exchange plates 80 may be disposed within the housing 20. A heat exchange plate 80 is disposed between each battery cell assembly 30 and the housing 20. The at least two battery cell assemblies 30 are arranged along the third direction Z. The at least two heat exchange plates 80 are spaced apart along the third direction Z.

[0136] For example, see Figure 12 As shown, four battery cell assemblies 30 and four heat exchange plates 80 may be disposed in the box body 20 .

[0137] The arrangement of the same number of battery cell assemblies 30 as the number of heat exchange plates 80 facilitates each heat exchange plate 80 to independently exchange heat with its corresponding battery cell assembly 30, thereby meeting thermal management requirements. The arrangement of each heat exchange plate 80 corresponding to the inner area 511 of the first wall 51 facilitates increasing the heat exchange area between the heat exchange plate 80 and the first wall 51, thereby improving heat exchange efficiency and effectiveness.

[0138] For some examples, see Figure 10 and Figure 13 As shown, the battery cell 40 includes a pressure relief portion 100. The pressure relief portion 100 is used to relieve internal pressure when the internal pressure or temperature of the battery cell 40 reaches a threshold. The pressure relief portion 100 is disposed on the first wall 51. Along the third direction Z, the pressure relief portion 100 is located between the two electrode terminals 60. The first wall 51 includes an inner region 511 between the two electrode terminals 60. The pressure relief portion 100 is disposed in the inner region 511. The heat exchange plate 80 includes a first opening 81. Along the second direction Y, the first opening 81 is disposed corresponding to the pressure relief portion 100.

[0139] In the event of thermal runaway of the battery cell 40, the pressure relief portion 100 can open to release the internal pressure of the battery cell 40. The first opening 81 of the heat exchange plate 80 can avoid the pressure relief portion 100, allowing the pressure relief portion 100 to vent smoothly with relatively little resistance. This helps reduce the possibility of the heat exchange plate 80 blocking the pressure relief portion 100, thereby improving the safety of the battery device 10.

[0140] Exemplarily, the area of ​​the first opening 81 is larger than the area of ​​the pressure relief portion 100 .

[0141] In some possible implementations, see Figures 14 to 16 As shown, the battery device 10 includes two or more heat exchange plates 80, which are spaced apart along the third direction Z. The battery cells 40 include two electrode terminals 60 spaced apart along the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. Along the third direction Z, the two electrode terminals 60 of any battery cell 40 in the battery cell assembly 30 are located between two adjacent heat exchange plates 80.

[0142] Along the third direction Z, a gap exists between two adjacent heat exchange plates 80. The electrode terminal 60 is located within this gap. The first wall 51 includes an outer region 512 located outside the electrode terminal 60. The first wall 51 includes two outer regions 512. The two outer regions 512 are respectively provided with a heat exchange plate 80.

[0143] The heat exchange plate 80 can exchange heat with an outer region 512 on the first wall 51, located outside the electrode terminals 60. The heat exchange plate 80 can heat or cool the battery cells 40 through the outer region 512, thereby facilitating thermal management of the entire battery cell assembly 30. This helps reduce the possibility of overheating or overcooling in the outer region 512, which could cause localized high or low temperatures in the battery cells 40, thereby improving overall temperature balance in the battery cells 40.

[0144] For some examples, see Figure 14 As shown, two or more battery cell assemblies 30 are arranged in a row along the third direction Z. Three or more heat exchange plates 80 are arranged at intervals along the third direction Z. Along the third direction Z, the two outermost heat exchange plates 80 are each arranged corresponding to a battery cell assembly 30, and each of the remaining heat exchange plates 80 is arranged corresponding to two adjacent battery cell assemblies 30.

[0145] Two adjacent battery cell assemblies 30 may share a heat exchange plate 80 . For a shared heat exchange plate 80 , a portion of the heat exchange plate 80 overlaps with the first wall 51 of the battery cell 40 in one battery cell assembly 30 , and a portion overlaps with the first wall 51 of the battery cell 40 in the other battery cell assembly 30 .

[0146] The shared heat exchange plate 80 can simultaneously exchange heat for the battery cells 40 in adjacent battery cell assemblies 30 , which is beneficial for improving the utilization rate of the heat exchange plate 80 and reducing the difficulty of arranging the heat exchange plate 80 .

[0147] For example, see Figure 14 As shown, the difference between the number of heat exchange plates 80 and the number of battery cell assemblies 30 is 1. For example, four battery cell assemblies 30 and five heat exchange plates 80 can be installed in the housing 20. The two outermost heat exchange plates 80 are each provided for a corresponding battery cell assembly 30, and the remaining three heat exchange plates 80 are shared heat exchange plates 80. Each of the three shared heat exchange plates 80 is provided for two adjacent battery cell assemblies 30.

[0148] For some examples, see Figure 15 and Figure 17 As shown, two heat exchange plates 80 are correspondingly disposed between each battery cell assembly 30 and the box body 20. The first wall 51 includes two outer regions 512. Each outer region 512 is correspondingly disposed with a heat exchange plate 80.

[0149] The two heat exchange plates 80 can exchange heat with the same battery cell 40 through the two outer regions 512 respectively, which is beneficial to improving the heat exchange efficiency and heat exchange effect.

[0150] For example, a battery cell assembly 30 and two heat exchange plates 80 may be provided in the housing 20. One battery cell assembly 30 includes a plurality of battery cells 40. Two heat exchange plates 80 are correspondingly provided between the battery cell assembly 30 and the housing 20.

[0151] For example, two or more battery cell assemblies 30 and four or more heat exchange plates 80 may be provided in the housing 20. Two heat exchange plates 80 are provided between each battery cell assembly 30 and the housing 20. The two or more battery cell assemblies 30 are arranged along the third direction Z.

[0152] For example, four battery cell assemblies 30 and eight heat exchange plates 80 may be disposed in the box 20 .

[0153] In some possible implementations, see Figure 18 and Figure 19 As shown, the battery device 10 includes a heat exchange plate 80 and two or more battery cell assemblies 30. The two or more battery cell assemblies 30 are arranged corresponding to one heat exchange plate 80. The heat exchange plate 80 can simultaneously exchange heat for the battery cells 40 in multiple battery cell assemblies 30, which is beneficial to improving the utilization rate of the heat exchange plate 80. A heat exchange plate 80 with a relatively large area can be arranged between the box body 20 and the battery cell assembly 30, which is beneficial to improving the space utilization rate between the box body 20 and the battery cell assembly 30. The overlapping area between the heat exchange plate 80 and the first wall 51 is relatively large, which is beneficial to increasing the heat exchange area between the heat exchange plate 80 and the first wall 51, thereby improving the heat exchange efficiency and heat exchange effect between the heat exchange plate 80 and the battery cell 40.

[0154] In some examples, the battery device 10 may include one heat exchange plate 80 and four battery cell assemblies 30 . The four battery cell assemblies 30 share one heat exchange plate 80 .

[0155] For some examples, see Figure 20 and Figure 21 As shown, the battery cell 40 includes a pressure relief portion 100 and two electrode terminals 60 spaced apart along the third direction Z. The pressure relief portion 100 is spaced apart from the electrode terminals 60. The pressure relief portion 100 is used to release the internal pressure when the internal pressure or temperature of the battery cell 40 reaches a threshold value. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The pressure relief portion 100 is provided on the first wall 51. The heat exchange plate 80 includes a first opening 81 and a second opening 82. Along the second direction Y, the first opening 81 is provided corresponding to the pressure relief portion 100, and the second opening 82 is provided corresponding to the electrode terminal 60.

[0156] In the event of thermal runaway of the battery cell 40, the pressure relief portion 100 can open to release the internal pressure of the battery cell 40. The first opening 81 of the heat exchange plate 80 can avoid the pressure relief portion 100, allowing the pressure relief portion 100 to vent smoothly with relatively little resistance. This helps reduce the possibility of the heat exchange plate 80 blocking the pressure relief portion 100, thereby improving the safety of the battery device 10.

[0157] The multiple battery cells 40 in the battery cell assembly 30 can be electrically connected via the busbar 110 to enable parallel, series, or mixed connection of the multiple battery cells 40 in the battery cell assembly 30. The second opening 82 avoids the electrode terminal 60, facilitating connection between the electrode terminal 60 and the busbar 110 and reducing the difficulty of connecting the busbar 110 to the electrode terminal 60.

[0158] For example, the area of ​​the first opening 81 is larger than the area of ​​the pressure relief portion 100 , and the area of ​​the second opening 82 is larger than the area of ​​the electrode terminal 60 .

[0159] Illustratively, along the third direction Z, the pressure relief portion 100 is located between the two electrode terminals 60 . The first wall 51 includes an inner region 511 located between the two electrode terminals 60 . The pressure relief portion 100 is disposed in the inner region 511 .

[0160] For example, see Figure 22 and Figure 23 As shown, along the second direction Y, the electrode terminal 60 passes through the second opening 82 and exceeds the opening of the second opening 82 .

[0161] The arrangement of the electrode terminal 60 beyond the opening of the second opening 82 facilitates the connection between the electrode terminal 60 and the busbar component 110, reducing the possibility of a false connection or poor connection between the busbar component 110 and the electrode terminal 60 due to positional interference between the busbar component 110 and the heat exchange plate 80.

[0162] The electrode terminal 60 is passed through the second opening 82 and extends beyond the opening of the second opening 82 , so that the electrode terminal 60 and the heat exchange plate 80 can be spatially reused, which is beneficial to improving the space utilization of the box body 20 and reducing the thickness of the box body 20 in the second direction Y.

[0163] For example, see Figure 22 and Figure 23 As shown, the heat exchange plate 80 includes a first recess 83 and a second recess 84. A first opening 81 is provided at the bottom of the first recess 83. A second opening 82 is provided at the bottom of the second recess 84.

[0164] The thickness of the heat exchange plate 80 is reduced in the first recess 83 and the second recess 84 , which is beneficial to reducing the weight of the heat exchange plate 80 and improving the energy density of the battery device 10 .

[0165] For example, a first opening 81 or more first openings 81 may be provided at the bottom of a first recess 83 , and a second opening 82 or more second openings 82 may be provided at the bottom of a second recess 84 .

[0166] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery device 10 of any of the above solutions, and the battery device 10 is used to provide electrical energy to the electrical device.

[0167] The power-consuming device may be any of the aforementioned devices or systems using the battery device 10 .

[0168] 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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, characterized in that: include: Cabinet, including frame; a battery cell assembly disposed in the frame, the battery cell assembly comprising a plurality of battery cells arranged side by side along a first direction, the battery cells comprising a housing and electrode terminals, the housing comprising a first wall, the first wall facing the box along a second direction, the first direction being perpendicular to the second direction, the electrode terminals being disposed on the first wall; A heat exchange plate is arranged in the box body, the heat exchange plate is connected to the frame body, at least part of the heat exchange plate is arranged between the first wall and the box body, the heat exchange plate is connected to the first wall, along the second direction, the orthographic projection of the heat exchange plate and the orthographic projection of the first wall have an overlapping area, and the orthographic projection of the heat exchange plate and the orthographic projection of the electrode terminal are arranged at intervals.

2. The battery device according to claim 1, wherein: The box includes a first plate and a second plate. Along the second direction, the first plate and the second plate are arranged opposite to each other. The battery cell assembly is arranged between the first plate and the second plate. The first wall is arranged facing the second plate.

3. The battery device according to claim 2, characterized in that The first plate body and the second plate body are respectively connected to the frame body.

4. The battery device according to claim 1, wherein: The frame includes a connected frame and a limiting beam. Along the first direction, the limiting beam is arranged between the battery cell assembly and the frame, and the heat exchange plate is connected to the limiting beam.

5. The battery device according to claim 1, wherein: The heat exchange plate is bonded to the first wall.

6. The battery device according to claim 1, wherein: Along the second direction, the electrode terminal protrudes from the first wall, and the electrode terminal protrudes from a surface of the heat exchange plate facing the battery cell assembly.

7. The battery device according to claim 1, wherein: The battery cell includes an electrode assembly, which is disposed in the housing and connected to the electrode terminal. Along the second direction, the orthographic projection of the heat exchange plate and the orthographic projection of the electrode assembly have an overlapping area.

8. The battery device according to claim 1, wherein: The battery device further includes a buffer member, which is disposed between the heat exchange plate and the box along the second direction.

9. The battery device according to any one of claims 1 to 8, characterized in that: The number of the battery cell assemblies is the same as the number of the heat exchange plates, and one heat exchange plate is correspondingly provided between each battery cell assembly and the box. The battery cell includes two electrode terminals spaced apart along a third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other. The two electrode terminals of any battery cell in the battery cell assembly are respectively arranged on both sides of the corresponding heat exchange plate along the third direction.

10. The battery device according to claim 9, characterized in that The battery cell includes a pressure relief portion, which is provided on the first wall and is located between the two electrode terminals along the third direction. The heat exchange plate includes a first opening, and along the second direction, the first opening is arranged corresponding to the pressure relief portion.

11. The battery device according to any one of claims 1 to 8, characterized in that: The battery device includes two or more heat exchange plates, which are spaced apart along a third direction. The battery cell includes two electrode terminals spaced apart along the third direction. The first direction, the second direction, and the third direction are perpendicular to each other. Along the third direction, the two electrode terminals of any one battery cell in the battery cell assembly are located between two adjacent heat exchange plates.

12. The battery device according to claim 11, wherein: Two or more battery cell assemblies are arranged along the third direction, and three or more heat exchange plates are arranged at intervals along the third direction. Along the third direction, the two outermost heat exchange plates are respectively arranged corresponding to one battery cell assembly, and each of the remaining heat exchange plates is arranged corresponding to two adjacent battery cell assemblies.

13. The battery device according to claim 11, wherein: Two heat exchange plates are correspondingly arranged between each battery cell assembly and the box body.

14. The battery device according to any one of claims 1 to 8, characterized in that: The battery device includes one heat exchange plate and two or more battery cell assemblies, and the two or more battery cell assemblies are arranged corresponding to one heat exchange plate.

15. The battery device according to claim 14, characterized in that The battery cell includes a pressure relief portion and two electrode terminals spaced apart along a third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other. The pressure relief portion is provided on the first wall. The heat exchange plate includes a first opening and a second opening. Along the second direction, the first opening is provided corresponding to the pressure relief portion, and the second opening is provided corresponding to the electrode terminal.

16. The battery device according to claim 15, characterized in that Along the second direction, the electrode terminal passes through the second opening and exceeds an opening of the second opening.

17. An electrical device, characterized in that: The battery device according to any one of claims 1 to 16 is used to provide electrical energy.

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