Battery devices and electrical appliances

Abstract

This application provides a battery device and an electrical device. The battery device includes a housing assembly, a thermal management assembly, and battery modules. The housing assembly has a receiving space, which is divided into at least two receiving areas in a first plane. The battery modules include at least two battery packs, with at least one battery pack placed in each receiving area. Each battery pack includes multiple battery layers stacked in the height direction of the battery device, and each battery layer includes multiple battery cells arranged along a first direction. The thermal management assembly includes at least one heat exchanger, the at least one heat exchanger having at least one medium flow channel inside, the at least one medium flow channel for conducting heat exchange medium for exchanging heat with the multiple battery layers. The heat exchanger is disposed between the multiple battery layers and is used to support at least a portion of the battery layers. The battery device provided by this application is beneficial for improving the charge and energy density of the battery device.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0002] In new energy vehicles equipped with battery devices, the battery devices can provide all or part of the power. Related technologies employ a single-layer battery arrangement, but single-layer battery devices may suffer from low energy density and limited capacity. Therefore, improving the energy density and capacity of battery devices has become an important research direction in this field. Summary of the Invention

[0003] In view of this, the embodiments of this application aim to provide a battery device and an electrical device that can improve the energy density and power of the battery device.

[0004] Therefore, a first aspect of the embodiments of this application provides a battery device, including:

[0005] A housing assembly having a receiving space, the receiving space being divided into at least two receiving areas in a first plane;

[0006] A battery assembly comprising at least two battery packs, with at least one battery pack placed in each of the receiving areas, each battery pack comprising multiple battery layers stacked in the height direction of the battery device, each battery layer comprising a plurality of battery cells arranged along a first direction; wherein the first plane is parallel to the first direction and perpendicular to the height direction of the battery device;

[0007] A thermal management component includes at least one heat exchanger, the at least one heat exchanger having at least one medium flow channel inside, the at least one medium flow channel being used to conduct a heat exchange medium for exchanging heat with multiple battery layers; wherein the heat exchanger is disposed between the multiple battery layers and is used to support at least a portion of the battery layers.

[0008] The battery device provided in this application includes a housing assembly and a battery assembly. The battery assembly is disposed within the housing space of the housing assembly, and the housing assembly protects the battery assembly. By dividing the housing space into at least two housing areas in a first plane, and configuring the battery assembly to include at least two battery packs, each battery pack comprising multiple battery layers stacked in the height direction of the battery device, and placing at least one battery pack in each housing area, this approach improves both the battery device's capacity and the efficient use of space within the housing assembly, thereby increasing the battery device's energy density. Furthermore, by placing heat exchangers between the multiple battery layers, heat exchange can be simultaneously performed on the battery layers located on opposite sides of the heat exchangers, improving the heat exchange efficiency of the heat exchangers on the battery layers. In other words, while increasing the energy density of the battery device, heat exchange efficiency can also be improved. Additionally, the heat exchangers support at least a portion of the battery layers, eliminating the need for additional parts to support the battery layers, thus reducing the number of components and lowering costs.

[0009] In some embodiments, at least a portion of the battery pack is arranged along the first direction.

[0010] In other words, at least some of the battery packs are arranged in the same direction as the individual battery cells in the battery layer.

[0011] In some embodiments, at least a portion of the battery pack is arranged along a second direction that intersects the first direction and is parallel to the first plane.

[0012] In other words, at least part of the battery pack's arrangement direction intersects with the arrangement direction of the individual battery cells in the battery layer.

[0013] In some other embodiments, some battery packs are arranged along a first direction, and other battery packs are arranged along a second direction.

[0014] In some embodiments, the battery assembly includes at least one end plate, and the end plate is disposed at at least one end of the battery layer along the first direction.

[0015] Here, the end plate is used to constrain the battery layer in the first direction and at least to withstand the expansion force of the individual battery cells. Specifically, the expansion force refers to the force exerted on the housing assembly due to the expansion and deformation of the individual battery cells. As an example, the end plate primarily withstands the expansion force along the first direction.

[0016] In some embodiments, at least a portion of the battery pack shares the heat exchanger.

[0017] In other words, the same heat exchanger can exchange heat not only with different battery layers of the same battery pack, but also with different battery packs. This helps to further simplify the structure and reduce the number of heat exchangers, thus reducing costs and improving assembly efficiency.

[0018] In some embodiments, the at least two battery packs include a first battery pack and a second battery pack, the first battery pack and the second battery pack are arranged along the first direction, and the first battery pack and the second battery pack share the heat exchanger.

[0019] In this way, on the one hand, it helps to further simplify the structure, reduce the number of heat exchange components, thereby reducing costs and improving assembly efficiency. On the other hand, it also facilitates the placement of heat exchange components.

[0020] In some embodiments, the first battery pack includes a first battery layer and a second battery layer, with the second battery layer located above the first battery layer; the second battery pack includes a third battery layer and a fourth battery layer, with the fourth battery layer located above the third battery layer.

[0021] The at least one heat exchanger includes a first heat exchanger located between the first battery layer and the second battery layer, and between the third battery layer and the fourth battery layer.

[0022] For example, the first heat exchanger includes a first part and a second part that are interconnected. The first part is disposed between the first battery layer and the second battery layer, and the second part is disposed between the third battery layer and the fourth battery layer, so as to simultaneously achieve heat exchange with the first battery pack and the second battery pack.

[0023] In some embodiments, the battery assembly includes at least one end plate, and the end plate is disposed at at least one end of the battery layer of the first battery pack and / or the second battery pack along the first direction.

[0024] Here, the end plate is used to constrain the battery layers of the first battery pack and / or the second battery pack in the first direction, and at least to withstand the expansion force of the individual battery cells. Specifically, the expansion force refers to the force exerted on the housing assembly due to the expansion and deformation of the individual battery cells. As an example, the end plate primarily withstands the expansion force along the first direction.

[0025] In some embodiments, the end plate includes a first end plate, a second end plate, and a third end plate spaced apart along the first direction, the second battery layer is disposed between the first end plate and the second end plate, and the fourth battery layer is disposed between the second end plate and the third end plate.

[0026] In this embodiment, by sharing a second end plate with the second and fourth battery layers, the accommodating space is divided into accommodating areas within the first plane, which helps to reduce the number of end plates, thereby reducing costs and improving assembly efficiency. Furthermore, it also reduces the space occupied, which helps to increase energy density and power output.

[0027] In some embodiments, the end plate includes a fourth end plate disposed between the first battery layer and the third battery layer.

[0028] In this embodiment, by providing a fourth end plate positioned between the first and third battery layers, the accommodating space is divided into accommodating areas within the first plane. This not only reduces the number of end plates, but also lowers costs and improves assembly efficiency. Furthermore, it reduces the space occupied, thereby contributing to increased energy density and power output.

[0029] In some embodiments, the heat exchanger is fastened, snapped, or welded to the end plate.

[0030] In some embodiments, the at least two battery packs further include a third battery pack and a fourth battery pack, the third battery pack and the fourth battery pack being arranged along the first direction, the third battery pack and the first battery pack being arranged along the second direction, the fourth battery pack and the second battery pack being arranged along the second direction, the third battery pack and the fourth battery pack sharing the heat exchanger, the second direction intersecting the first direction and being parallel to the first plane.

[0031] In this embodiment, it is beneficial to reduce the number of heat exchange components, thereby reducing costs, improving assembly efficiency, and also improving energy density and power consumption.

[0032] In some embodiments, the at least one heat exchanger includes a second heat exchanger and a third heat exchanger, the second heat exchanger and the third heat exchanger being arranged along a second direction, the second direction intersecting the first direction and being parallel to the first plane; wherein the second heat exchanger and the third heat exchanger are connected in series or in parallel.

[0033] Here, the second and third heat exchangers can be connected in series or in parallel according to actual needs.

[0034] In some embodiments, the second heat exchanger includes a first inlet and a first outlet, the third heat exchanger includes a second inlet and a second outlet, the thermal management assembly includes a connecting pipe, the first outlet and the second inlet are connected through the connecting pipe, and the first inlet and the second outlet are connected to the outside of the housing assembly.

[0035] Here, both the first inlet and the second outlet are connected to the medium flow channel of the second heat exchanger, and both the second inlet and the second outlet are connected to the medium flow channel of the third heat exchanger. The first inlet and the second outlet are used to connect to the piping of the air conditioning system or liquid storage device such as a water tank in a vehicle or electrical appliance. The first outlet and the second inlet are connected by a connecting pipe, meaning that the second heat exchanger and the third heat exchanger are connected in series through the connecting pipe.

[0036] In some embodiments, the dimensions of the battery cell along the height direction of the battery device and the dimensions of the battery cell along a first direction are smaller than the dimensions of the battery cell along a second direction, which intersects the first direction and is parallel to the first plane, and the dimensions of the battery cell along the second direction are in the range of 300mm to 1200mm.

[0037] In this embodiment, by setting the size of the battery cell along the second direction to be in the range of 300mm to 1200mm, both the battery capacity and assembly efficiency of the battery device can be taken into account.

[0038] In some embodiments, the battery cell further includes a terminal post and / or a pressure relief structure, the terminal post and / or pressure relief structure being disposed on at least one side of the battery cell along a second direction, the second direction intersecting the first direction and being parallel to the first plane.

[0039] In this embodiment, by placing the terminal post and / or pressure relief structure on at least one side of the battery cell along the second direction, it is beneficial to improve the structural compactness of the battery device and reduce the possibility of damage to the terminal post and / or pressure relief structure during the stacking of battery cells and / or battery layers.

[0040] A second aspect of this application provides an electrical device, including the battery device described above.

[0041] The battery device of the power device provided in this application embodiment includes a housing assembly and a battery assembly. The battery assembly is disposed within the housing space of the housing assembly, and the housing assembly protects the battery assembly. By dividing the housing space into at least two housing areas in a first plane, and configuring the battery assembly to include at least two battery packs, each battery pack comprising multiple battery layers stacked in the height direction of the battery device, and placing at least one battery pack in each housing area, it is beneficial to increase the battery capacity of the device and to make full use of the space within the housing assembly, thereby increasing the energy density of the battery device. Furthermore, by disposing of heat exchangers between the multiple battery layers, heat exchange can be performed simultaneously on the battery layers located on opposite sides of the heat exchangers, which is beneficial to improving the heat exchange efficiency of the heat exchangers on the battery layers. In other words, while increasing the energy density of the battery device, heat exchange efficiency can also be improved. In addition, the heat exchangers are used to support at least part of the battery layers, meaning that no additional parts are needed to support the battery layers, which helps to reduce the number of components and lower costs. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the vehicle structure provided in some embodiments of this disclosure;

[0043] Figure 2 This is an exploded perspective view of a battery device provided in some embodiments of the present disclosure;

[0044] Figure 3 A partial exploded perspective view of the battery device provided in the first embodiment of this disclosure;

[0045] Figure 4 A partial exploded perspective view of the battery device provided in the second embodiment of this disclosure;

[0046] Figure 5 The top view of the first housing is omitted for some embodiments of the battery device provided in this disclosure;

[0047] Figure 6 for Figure 5 A cross-sectional view along the AA direction.

[0048] Explanation of reference numerals in the attached figures

[0049] 10. Battery pack; 11. Battery cell; 12. First battery pack; 121. First battery layer; 122. Second battery layer; 13. Second battery pack; 131. Third battery layer; 132. Fourth battery layer; 14. Third battery pack; 15. Fourth battery pack; 20. Housing assembly; 21. First housing; 22. Second housing; 30. Thermal management assembly; 31. Heat exchanger; 311. First heat exchanger; 312. Second heat exchanger; 3121. First inlet; 3122. First outlet; 313. Third heat exchanger; 3131. Second inlet; 3132. Second outlet; 50. End plate; 51. First end plate; 52. Second end plate; 53. Third end plate; 54. Fourth end plate; 60. Vertical beam; 100. Battery unit; 200. Controller; 300. Motor; 1000. Vehicle. Detailed Implementation

[0050] Unless otherwise specified, all embodiments and optional embodiments of this disclosure can be combined to form new technical solutions.

[0051] Unless otherwise specified, all technical features and optional technical features of this disclosure can be combined to form new technical solutions.

[0052] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0053] In this embodiment of the disclosure, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0054] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments disclosed herein are not limited to this.

[0055] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0056] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0057] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0058] In some implementations, the electrode assembly is a stacked structure.

[0059] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0060] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0061] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0062] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0063] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0064] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0065] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0066] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0067] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This disclosure does not impose any particular limitations.

[0068] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0069] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0070] In some embodiments, energy storage devices include energy storage containers, energy storage cabinets, etc.

[0071] In related technologies, a single-layer battery arrangement is used; however, single-layer battery devices may suffer from low energy density and limited capacity. Therefore, improving the energy density and capacity of battery devices has become an important research direction in this field.

[0072] In view of this, in order to improve the energy density and capacity of the battery device, embodiments of this disclosure provide a battery device including a housing assembly, a thermal management assembly, and a battery assembly. The housing assembly has a receiving space, which is divided into at least two receiving areas in a first plane. The battery assembly includes at least two battery packs, with at least one battery pack placed in each receiving area. Each battery pack includes multiple battery layers stacked in the height direction of the battery device, and each battery layer includes multiple battery cells arranged along a first direction. The first plane is parallel to the first direction and perpendicular to the height direction of the battery device. The thermal management assembly includes at least one heat exchanger, the at least one heat exchanger having at least one medium flow channel inside, the at least one medium flow channel for conducting a heat exchange medium for exchanging heat with the multiple battery layers; wherein the heat exchanger is disposed between the multiple battery layers and is used to support at least a portion of the battery layers.

[0073] The battery device provided in this application includes a housing assembly and a battery assembly. The battery assembly is disposed within the housing space of the housing assembly, and the housing assembly protects the battery assembly. By dividing the housing space into at least two housing areas in a first plane, and configuring the battery assembly to include at least two battery packs, each battery pack comprising multiple battery layers stacked in the height direction of the battery device, and placing at least one battery pack in each housing area, this approach improves both the battery device's capacity and the efficient use of space within the housing assembly, thereby increasing the battery device's energy density. Furthermore, by placing heat exchangers between the multiple battery layers, heat exchange can be simultaneously performed on the battery layers located on opposite sides of the heat exchangers, improving the heat exchange efficiency of the heat exchangers on the battery layers. In other words, while increasing the energy density of the battery device, heat exchange efficiency can also be improved. Additionally, the heat exchangers support at least a portion of the battery layers, eliminating the need for additional parts to support the battery layers, thus reducing the number of components and lowering costs.

[0074] The technical solutions described in this disclosure are applicable to electrical devices that use battery devices. The electrical device includes the battery device according to any embodiment of this disclosure, and the battery device is used to provide electrical energy.

[0075] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This disclosure does not impose any special limitations on the above-mentioned electrical devices.

[0076] It should be noted that the technical solutions described in this disclosure are not limited to the battery devices described above, but can also be applied to all electrical devices and energy storage devices that include battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicles as examples.

[0077] Please refer to Figure 1The vehicle 1000 may contain a controller 200, a motor 300, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation. In another embodiment of this disclosure, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0078] Please see Figures 2 to 6 This disclosure provides a battery device 100, which includes a housing assembly 20 and battery packs 10. The housing assembly 20 has a receiving space, which is divided into at least two receiving areas in a first plane. The battery packs 10 include at least two battery packs 10, and at least one battery pack 10 is placed in each receiving area. Each battery pack 10 includes multiple battery layers stacked in the height direction of the battery device 100, and each battery layer includes a plurality of battery cells 11 arranged along a first direction. The first plane is parallel to the first direction and perpendicular to the height direction of the battery device 100.

[0079] The multi-layered structure mentioned in this application refers to two or more layers.

[0080] The term "battery pack 10" refers to a battery pack 10 consisting of two or more batteries.

[0081] To meet different power demands, the battery pack 100 includes at least two battery packs 10. Each battery pack 10 includes multiple battery layers stacked along the height of the battery pack 100. Each battery layer includes multiple battery cells 11, where a battery cell 11 is the smallest unit that makes up a battery module or battery pack. Multiple battery cells 11 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 11 are connected in both series and parallel connections. Multiple battery cells 11 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of multiple battery cells 11 is housed within the housing assembly 20. Alternatively, the battery pack 100 can also consist of multiple battery cells 11 first connected in series, parallel, or in a mixed configuration to form battery modules, and then multiple battery modules connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing assembly 20. The battery pack 100 may also include other structures; for example, the battery pack 100 may also include a busbar for electrical connection between multiple battery cells 11. Each battery cell 11 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 11 can be cylindrical, flat, cuboid, or other shapes.

[0082] The enclosure component 20 can be a simple three-dimensional structure such as a cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The material of the enclosure component 20 can be an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0083] The housing assembly 20 is used to encapsulate the battery cell 11, and the housing assembly 20 can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell 11.

[0084] For example, the enclosure assembly 20 is typically a cuboid structure, with both its length and width directions parallel to the horizontal plane. The length direction of the enclosure assembly 20 is parallel to the longest side of its cuboid structure. The height direction of the enclosure assembly 20 is perpendicular to the ground.

[0085] The housing assembly 20 is used to house the individual battery cells 11, and the housing assembly 20 can have various structures. See, in some embodiments, [link to relevant documentation]. Figure 2 and Figure 3 The housing assembly 20 may include a first housing 21 and a second housing 22, which cover each other to define a receiving space for accommodating the battery cell 11.

[0086] For example, please refer to Figure 2 , Figure 5 and Figure 6 The first direction is represented by X, the second direction by Y, and the height direction of the battery device 100 is represented by Z.

[0087] To improve the sealing performance after the first housing 21 and the second housing 22 are connected, a sealing element, such as sealant or sealing ring, can also be installed between the first housing 21 and the second housing 22.

[0088] Assuming that the first box 21 is closed on top of the second box 22, the first box 21 can also be called the upper box cover, and the second box 22 can also be called the lower box cover.

[0089] The accommodating space is divided into at least two accommodating areas in the first plane, and at least one battery pack 10 is placed in each accommodating area. That is, one battery pack 10 or multiple battery packs 10 can be placed in each accommodating area.

[0090] For example, the battery device 100 includes a structural beam disposed within a receiving space to divide the receiving space into at least two receiving areas in a first plane. The arrangement of the structural beam facilitates full utilization of the receiving space and improves the structural compactness of the battery device 100.

[0091] For example, the structural beam includes a vertical beam 60 that extends along a first direction.

[0092] For example, the structural beam includes a crossbeam extending along a second direction that intersects with the first direction and is parallel to the first plane.

[0093] For example, the crossbeam may be an expansion beam, and the battery layer is provided with an expansion beam at at least one end along the first direction.

[0094] The first plane is perpendicular to the height direction of the battery device 100, that is, the accommodating space is divided into at least two accommodating areas in the plane perpendicular to the height direction of the battery device 100.

[0095] The battery device 100 provided in this application embodiment includes a housing assembly 20 and battery packs 10. The battery packs 10 are disposed within the housing space of the housing assembly 20, and the housing assembly 20 protects the battery packs 10. By dividing the housing space into at least two housing areas in a first plane, and configuring the battery packs 10 to include at least two battery packs 10, with each battery pack 10 comprising multiple layers of batteries stacked in the height direction of the battery device 100, and placing at least one battery pack 10 in each housing area, it is beneficial to increase the power capacity of the battery device 100 and to fully utilize the space within the housing assembly 20, thereby increasing the energy density of the battery device 100.

[0096] It should be noted that there are multiple ways to arrange the battery packs 10.

[0097] In some embodiments, please refer to Figures 5 to 6 At least a portion of the battery pack 10 is arranged along the first direction.

[0098] In other words, at least some of the battery packs 10 are arranged in the same direction as the battery cells 11 in the battery layer.

[0099] In other embodiments, please refer to Figures 2 to 5 At least a portion of the battery pack 10 is arranged along a second direction, which intersects with the first direction and is parallel to the first plane.

[0100] The second direction intersects the first direction, meaning that the second direction is not parallel to the first direction; for example, the second direction is perpendicular to the first direction.

[0101] In other words, at least part of the battery pack 10 is arranged in a direction that intersects with the arrangement direction of the individual battery cells 11 in the battery layer.

[0102] In some other embodiments, please refer to Figure 5 Some of the battery packs 10 are arranged along the first direction, and the other part of the battery packs 10 are arranged along the second direction.

[0103] In some embodiments, please refer to Figures 2 to 6 The battery pack 10 includes at least one end plate 50, and the battery layer is provided with the end plate 50 at at least one end along the first direction.

[0104] The number of end plates 50 can be one or more.

[0105] The battery layer may have an end plate 50 at one end along the first direction, and the other end may abut against the side wall of the housing assembly 20. Alternatively, the battery layer may have end plates 50 at both ends along the first direction.

[0106] In an embodiment where end plates 50 are provided at both ends of the battery layer along the first direction, the heat exchanger 31 is connected to the end plates 50 at both ends along the first direction.

[0107] Here, the end plate 50 is used to constrain the battery layer in the first direction and at least to withstand the expansion force of the battery cell 11. Specifically, the expansion force refers to the force exerted on the housing assembly 20 due to the expansion and deformation of the battery cell 11. As an example, the end plate 50 primarily withstands the expansion force along the first direction.

[0108] In some related technologies, end plate 50 is also referred to as an expansion beam.

[0109] The specific structure and material of the end plate 50 are not limited. As an example, the end plate 50 can be a beam-like structure and can be made of any suitable material, such as metal, polymer, composite materials, etc.

[0110] For example, please refer to Figure 3 The housing assembly 20 includes a frame and a bottom wall. The frame is disposed along the edge of the bottom wall, and the frame and the bottom wall together enclose an accommodating space. The end plate 50 is connected to the frame. It can be understood that the heat exchanger 31 can transfer the force it receives to the end plate 50, and the end plate 50 can transfer the force it receives to the frame. That is to say, the frame can provide support for the end plate 50, and the end plate 50 can provide support for the heat exchanger 31.

[0111] For example, the end plate 50 is connected to the frame at both ends along the second direction.

[0112] For example, the end plate 50 may be connected to the frame first, and then the battery layer may be assembled; or the end plate 50 may be assembled with the battery layer first, and then the pre-assembled parts of the end plate 50 and the battery layer may be assembled to the frame.

[0113] Of course, the end plate 50 can also be connected to the bottom wall of the housing assembly 20.

[0114] In this embodiment, by having end plates 50 at at least one end of the battery layer along the first direction, the end plates 50 are used to constrain the battery layer in the first direction and at least to withstand the expansion force of the battery cell 11, which helps to improve the reliability of the battery device 100.

[0115] The specific connection method between the heat exchanger 31 and the end plate 50 is not limited. It can be a fastening connection, snap-fit, or welding, so as to transfer the force on the heat exchanger 31 to the end plate 50.

[0116] In this embodiment, by having end plates 50 at at least one end of the battery layer along the first direction, and connecting the heat exchanger 31 at least one end along the first direction to the end plates 50, it is beneficial for the heat exchanger 31 to transfer the force it receives to the frame through the end plates 50, which is beneficial to improve the support strength of the battery layer, and also beneficial to reduce the possibility of the battery layer below being crushed and damaged due to excessive stacking of the battery layer, thereby improving the capacity of the battery device 100 and improving the reliability of the battery device 100.

[0117] For example, the heat exchanger 31 and the battery layer can be bonded together by applying adhesive. This connection structure is simple and helps to improve the heat exchange efficiency between the heat exchanger 31 and the battery layer.

[0118] At least one side of the battery cell 11 along the height direction is bonded to the thermal management assembly 30.

[0119] In some embodiments, please refer to Figures 2 to 5 The battery device 100 includes a thermal management component 30, which includes at least one heat exchanger 31. The heat exchanger 31 has at least one medium flow channel inside, which is used to conduct a heat exchange medium for exchanging heat with the multi-layer battery layers. The heat exchanger 31 is disposed between the multi-layer battery layers and serves to support at least a portion of the battery layers.

[0120] It should be noted that the specific type of heat exchange medium is not limited here, as long as it can achieve a heat exchange effect on the battery cell 11, such as being gaseous or liquid. In this embodiment, a coolant is used as an example for description.

[0121] It should be noted that there is no limit to the specific number of media flow channels. There can be one or more.

[0122] In this embodiment, by placing the heat exchanger 31 between the multiple battery layers, heat exchange can be performed simultaneously on the battery layers located on opposite sides of the heat exchanger 31. This is beneficial to improving the heat exchange efficiency of the heat exchanger 31 on the battery layers. In other words, while increasing the energy density of the battery device 100, the heat exchange efficiency can also be improved. In addition, the heat exchanger 31 is used to support at least part of the battery layers, which means that no additional parts are needed to support the battery layers, which is beneficial to reduce the number of parts and lower the cost.

[0123] The specific structure of the heat exchanger 31 is not limited here.

[0124] For example, the heat exchanger 31 includes two heat exchange plates stacked together to form a medium flow channel between the two heat exchange plates.

[0125] For example, the heat exchange plate is a plate-shaped structure, which can have a certain structural strength and support strength, thereby helping to improve the overall structural strength and stability of the thermal management component 30.

[0126] For example, the heat exchange plate can also be stamped or welded into a specific structure as needed for support or other functions.

[0127] For example, please refer to Figures 2 to 4 The thermal management component 30 also includes a liquid inlet and a liquid outlet, both of which are connected to the medium flow channel.

[0128] Here, the inlet and outlet of the thermal management component 30 can be used to connect to the piping of the air conditioning system or water tank of the vehicle or electrical device.

[0129] The principle of heat exchange between the thermal management component 30 and the battery cell 11 is as follows: the heat exchange medium output from the heat exchange medium source (not shown in the figure) enters the medium flow channel through the liquid inlet of the thermal management component 30. After the heat exchange medium exchanges heat with the battery cell 11, the heat exchange medium flows out through the liquid outlet of the thermal management component 30, thus completing the heat exchange between the battery cell 11.

[0130] Here, the thermal management component 30 can exchange heat with the battery cell 11 by either dissipating heat from the battery cell 11 or by heating the battery cell 11.

[0131] The principle of the thermal management component 30 for heat dissipation of the battery cell 11 is as follows: the heat exchange medium output from the heat exchange medium source enters the medium flow channel through the liquid inlet of the thermal management component 30. After the heat exchange medium absorbs the heat generated by the battery cell 11 during operation, the heat exchange medium flows out through the liquid outlet of the thermal management component 30, releasing the heat and completing the cooling and heat dissipation of the battery cell 11.

[0132] The principle of the thermal management component 30 heating the battery cell 11 is as follows: the heat exchange medium output from the heat exchange medium source enters the medium flow channel through the liquid inlet of the thermal management component 30, the heat exchange medium transfers heat to the battery cell 11, and after heating the battery cell 11, the heat exchange medium flows out through the liquid outlet of the thermal management component 30, thus completing the heating of the battery cell 11.

[0133] Here, by having at least one heat exchange plate with a protrusion and forming a medium flow channel within the protrusion, that is, by setting the protrusion into the required shape as needed, the design flexibility of the medium flow channel is improved.

[0134] For example, the heat exchange plate can be formed with protrusions by stamping.

[0135] The specific material of the heat exchange plate is not limited here.

[0136] In some implementations, the heat exchange plate is a metal plate. For example, the material of the heat exchange plate may be aluminum alloy, steel, etc.

[0137] The materials of different heat exchange plates can be the same or different.

[0138] In this embodiment, by setting the heat exchange plate as a metal plate, the metal plate has both good structural strength and good thermal conductivity. In other words, while ensuring that the heat exchange component 31 has a certain heat exchange efficiency, the heat exchange plate can also have a certain structural strength.

[0139] For example, at least two heat exchange plates are welded together. That is, the heat exchange plates are welded together to form heat exchange component 31, which helps to improve the reliability of the connection structure between the heat exchange plates.

[0140] For example, the heat exchange plates are connected by brazing.

[0141] Brazing combines dissimilar metals (such as aluminum-based composites) through a hot-rolling composite process, giving the material high mechanical strength, corrosion resistance, and fatigue resistance, making it suitable for heavy-duty and harsh environments. Furthermore, brazed joints offer good airtightness and liquid tightness, supporting the joining of various metals and alloys. Additionally, the size and path of the medium flow channel can be freely designed, making it suitable for complex scenarios with irregular heat source distribution or limited space.

[0142] Of course, the heat exchanger 31 may include a harmonica tube, that is, the medium flow channel may be straight and the medium flow channel passes through at least one end of the heat exchanger 31 along the first direction.

[0143] The thermal management component 30 also includes a collector, which has a collection space and an inlet and an outlet that are both connected to the collection space. The collection space is connected to at least a portion of the medium flow channel.

[0144] In some embodiments, please refer to Figures 5 to 6 At least some of the battery packs 10 share the same heat exchanger 31.

[0145] Here, either some of the battery packs 10 can share a heat exchanger 31, or all of the battery packs 10 can share a heat exchanger 31.

[0146] In other words, the same heat exchanger 31 can exchange heat with different battery layers of the same battery pack 10, as well as with different battery packs 10. This helps to further simplify the structure and reduce the number of heat exchangers 31, which in turn helps to reduce costs and improve assembly efficiency.

[0147] In some embodiments, please refer to Figures 5 to 6 At least two battery packs 10 include a first battery pack 12 and a second battery pack 13, which are arranged along a first direction and share a heat exchange element 31.

[0148] In other words, the first battery pack 12 and the second battery pack 13 are arranged along the arrangement direction of each battery cell 11 in the battery layer.

[0149] The first battery pack 12 and the second battery pack 13 share a heat exchanger 31. That is, a part of the heat exchanger 31 is disposed between the battery layers of the first battery pack 12, and another part is disposed between the battery layers of the second battery pack 13, so as to achieve heat exchange with the first battery pack 12 and the second battery pack 13 at the same time.

[0150] In this way, on the one hand, it helps to further simplify the structure and reduce the number of heat exchanger components 31, thereby reducing costs and improving assembly efficiency. On the other hand, it also facilitates the placement of the heat exchanger components 31.

[0151] In some embodiments, please refer to Figures 5 to 6 The first battery pack 12 includes a first battery layer 121 and a second battery layer 122, with the second battery layer 122 located above the first battery layer 121. The second battery pack 13 includes a third battery layer 131 and a fourth battery layer 132, with the fourth battery layer 132 located above the third battery layer 131. At least one heat exchanger 31 includes a first heat exchanger 311, which is located between the first battery layer 121 and the second battery layer 122, and between the third battery layer 131 and the fourth battery layer 132.

[0152] In other words, the first battery pack 12 and the second battery pack 13 share the first heat exchanger 311.

[0153] The first heat exchanger 311 is located between the first battery layer 121 and the second battery layer 122, and between the third battery layer 131 and the fourth battery layer 132. In other words, the first heat exchanger 311 can exchange heat with the first battery pack 12 and the second battery pack 13 at the same time.

[0154] For example, the first heat exchanger 311 includes a first part and a second part that are interconnected. The first part is disposed between the first battery layer 121 and the second battery layer 122, and the second part is disposed between the third battery layer 131 and the fourth battery layer 132, so as to simultaneously achieve heat exchange with the first battery pack 12 and the second battery pack 13.

[0155] In some embodiments, please refer to Figures 5 to 6 The battery pack 10 includes at least one end plate 50, and the battery layers of the first battery pack 12 and / or the second battery pack 13 are provided with end plates 50 at at least one end along the first direction.

[0156] Here, the end plate 50 may be provided at least one end of the battery layer of the first battery pack 12 along the first direction, or the end plate 50 may be provided at least one end of the battery layer of the second battery pack 13 along the first direction, or the end plate 50 may be provided at least one end of the battery layer of the first battery pack 12 and the second battery pack 13 along the first direction.

[0157] Here, the end plate 50 is used to constrain the battery layers of the first battery pack 12 and / or the second battery pack 13 in the first direction, and at least to withstand the expansion force of the battery cell 11. Specifically, the expansion force refers to the force exerted on the housing assembly 20 due to the expansion and deformation of the battery cell 11. As an example, the end plate 50 primarily withstands the expansion force along the first direction.

[0158] In some embodiments, please continue reading Figures 5 to 6 The end plate 50 includes a first end plate 51, a second end plate 52 and a third end plate 53 spaced apart along a first direction, a second battery layer 122 disposed between the first end plate 51 and the second end plate 52, and a fourth battery layer 132 disposed between the second end plate 52 and the third end plate 53.

[0159] In other words, the second end plate 52 is disposed between the second battery layer 122 and the fourth battery layer 132, and the second battery layer 122 and the fourth battery layer 132 share the second end plate 52.

[0160] The first end plate 51, the second end plate 52 and / or the third end plate 53 are connected to the first heat exchanger 311. The first end plate 51, the second end plate 52 and / or the third end plate 53 are connected to the first heat exchanger 311 by means of fastening, snap-fitting or welding, for example.

[0161] In this embodiment, by sharing the second end plate 52 with the fourth battery layer 122, the accommodating space is divided into accommodating areas within the first plane, which helps to reduce the number of end plates 50, thereby reducing costs and improving assembly efficiency. Furthermore, it also reduces the space occupied, which helps to improve energy density and power output.

[0162] In some embodiments, please refer to Figures 5 to 6 The end plate 50 includes a fourth end plate 54, which is disposed between the first battery layer 121 and the third battery layer 131.

[0163] In other words, the first battery layer 121 and the third battery layer 131 share the fourth end plate 54.

[0164] Here, the end of the first battery layer 121 away from the fourth end plate 54 may be provided with an end plate 50 or may not be provided with an end plate 50. That is, the end of the first battery layer 121 away from the fourth end plate 54 may abut against the side wall of the housing assembly 20.

[0165] Similarly, the end of the third battery layer 131 away from the fourth end plate 54 may be provided with an end plate 50 or may not be provided with an end plate 50, that is, the end of the third battery layer 131 away from the fourth end plate 54 may abut against the side wall of the housing assembly 20.

[0166] For example, the fourth end plate 54 is connected to the first heat exchanger 311. The fourth end plate 54 and the first heat exchanger 311 are connected, for example, by fastening, snap-fitting, or welding.

[0167] In this embodiment, by providing a fourth end plate 54, which is disposed between the first battery layer 121 and the third battery layer 131, the accommodating space is divided into accommodating areas within the first plane, which helps to reduce the number of end plates 50, thereby reducing costs and improving assembly efficiency. Furthermore, it also reduces the space occupied, which helps to improve energy density and power output.

[0168] In some embodiments, please refer to Figure 5 The at least two battery packs 10 also include a third battery pack 14 and a fourth battery pack 15, the third battery pack 14 and the fourth battery pack 15 are arranged along a first direction, the third battery pack 14 and the first battery pack 12 are arranged along a second direction, the fourth battery pack 15 and the second battery pack 13 are arranged along a second direction, and the third battery pack 14 and the fourth battery pack 15 share a heat exchange element 31.

[0169] In other words, the first battery pack 12, the second battery pack 13, the third battery pack 14, and the fourth battery pack 15 are arranged in an array.

[0170] The first battery pack 12 and the second battery pack 13 share the same heat exchanger 31, and the third battery pack 14 and the fourth battery pack 15 share the same heat exchanger 31, that is, the two battery packs 10 share one heat exchanger 31.

[0171] In this embodiment, it is beneficial to reduce the number of heat exchange components 31, thereby reducing costs, improving assembly efficiency, and also improving energy density and power consumption.

[0172] In other embodiments, the first battery pack 12 and the third battery pack 14 may share the same heat exchanger 31, and the second battery pack 13 and the fourth battery pack 15 may share the same heat exchanger 31.

[0173] In some other embodiments, the first battery pack 12, the second battery pack 13, the third battery pack 14, and the fourth battery pack 15 may share the same heat exchanger 31.

[0174] In some embodiments, please refer to Figures 2 to 3 At least two battery packs 10 include a first battery pack 12 and a third battery pack 14, which are arranged along the second direction.

[0175] In some embodiments, please refer to Figures 2 to 4 At least one heat exchanger 31 includes a second heat exchanger 312 and a third heat exchanger 313, which are arranged along a second direction that intersects with a first direction and is parallel to a first plane. The second heat exchanger 312 and the third heat exchanger 313 are connected in series or in parallel.

[0176] For example, the second heat exchanger 312 and the third heat exchanger 313 are used to exchange heat with the first battery pack 12 and the third battery pack 14, respectively.

[0177] Here, the second heat exchanger 312 and the third heat exchanger 313 can be connected in series or in parallel according to actual needs.

[0178] In some embodiments, please refer to Figures 2 to 4 The second heat exchanger 312 includes a first inlet 3121 and a first outlet 3122, the third heat exchanger 313 includes a second inlet 3131 and a second outlet 3132, the thermal management assembly 30 includes a connecting pipe, the first outlet 3122 and the second inlet 3131 are connected through the connecting pipe, and the first inlet 3121 and the second outlet 3132 are connected to the outside of the housing assembly 20.

[0179] Here, the first inlet 3121 and the second outlet 3132 are both connected to the medium flow channel of the second heat exchanger 312, and the second inlet 3131 and the second outlet 3132 are both connected to the medium flow channel of the third heat exchanger 313.

[0180] The first inlet 3121 and the second outlet 3132 are used to connect to the pipeline of the air conditioning system or liquid storage device such as water tank of the whole vehicle or electrical device.

[0181] The first outlet 3122 and the second inlet 3131 are connected by a connecting pipe, that is, the second heat exchanger 312 and the third heat exchanger 313 are connected in series by a connecting pipe.

[0182] Here, the connecting pipe can connect the first outlet 3122 and the second inlet 3131 inside the housing assembly 20, or it can connect the first outlet 3122 and the second inlet 3131 outside the housing assembly 20. In other words, the connecting pipe can be set inside the housing assembly 20 or outside the housing assembly 20.

[0183] In cold environments, the temperature of the battery device 100 may be low, which may also affect the performance of the battery device 100. In related technologies, a heating device is set up to heat the heat exchange medium, thereby heating the battery cell 11. However, this method has the problems of complex structure and high cost.

[0184] In some embodiments, the thermal management component 30 further includes a heating element, which is disposed between the heat exchanger 31 and the battery layer.

[0185] For example, the heating element may be a heating film, and further, the heating element may be an electric heating film.

[0186] For example, the heating element has a heating resistor inside, which generates heat when energized to heat the battery layer.

[0187] Taking the first battery pack 12 as an example, the first battery pack 12 includes a first battery layer 121 and a second battery layer 122. The second battery layer 122 is located above the first battery layer 121, and a heating element is disposed between the heat exchange element 31 and the first battery layer 121. When the battery layer needs to be heated, part of the heat generated by the heating element can be directly transferred to the first battery layer 121, and the other part can be transferred to the second battery layer 122 through the heat exchange element 31. The material of the heat exchange element 31 itself can effectively transfer the heat generated by the heating element to the second battery layer 122. In this way, the heating element can simultaneously heat two adjacent battery layers (such as the first battery layer 121 and the second battery layer 122), improving the heating efficiency.

[0188] When the battery layer needs to be cooled, the cold energy generated by the heat exchanger 31 can be transferred to the first battery layer 121 through the heating element (at this time the heating element does not generate heat) to achieve heat dissipation of the first battery layer 121.

[0189] For example, the heating element can be first attached to the surface of the heat exchanger 31, and then the heat exchanger 31 and the heating element can be fitted to the first battery layer 121, for example, by applying adhesive. Of course, it is also possible to first attach the heating element to the first battery layer 121, and then apply adhesive to fix the heat exchanger 31, the heating element, and the first battery layer 121.

[0190] In this embodiment, a heating element is provided between the heat exchanger 31 and the battery layer to simultaneously heat the battery layers on both sides of the heat exchanger 31. This structure is simple, low in cost, and conducive to improving heating efficiency.

[0191] In some implementations, please refer to Figures 2 to 3 The dimensions h1 of the battery cell 11 along the height direction of the battery device 100 and the dimensions h2 of the battery cell 11 along the first direction are smaller than the dimensions h3 of the battery cell 11 along the second direction. The first direction, the second direction and the height direction of the battery device 100 intersect. The dimensions of the battery cell 11 along the second direction are in the range of 300mm to 1200mm.

[0192] The dimension of the battery cell 11 along the second direction can be any one of 300mm, 350mm, 400mm, 450mm, 500mm, 560mm, 600mm, 650mm, 700mm, 780mm, 800mm, 830mm, 860mm, 900mm, 950mm, 1000mm, 1050mm, 1100mm, 1150mm, 1200mm or any combination thereof.

[0193] Here, h1, h2, and h3 can be measured at room temperature using measuring tools such as vernier calipers before the battery device 100 is used.

[0194] It should be noted that h1, h2 and h3 do not include the dimensions of the terminals and / or pressure relief structures, that is, h1, h2 and h3 can be obtained by measuring the dimensions of the casing of the battery cell 11.

[0195] In this embodiment, by setting the size of the battery cell 11 along the second direction to be in the range of 300mm to 1200mm, the battery capacity and assembly efficiency of the battery device 100 can be balanced.

[0196] For example, the battery cell 11 in this embodiment may be a blade battery, which is both long and thin.

[0197] The dimension of the battery cell 11 along the height direction of the battery device 100 may be greater than the dimension of the battery cell 11 along the first direction, or the dimension of the battery cell 11 along the height direction of the battery device 100 may be smaller than the dimension of the battery cell 11 along the first direction.

[0198] It is understandable that, while facilitating the stacking of battery cells 11 along the first direction, it also facilitates the stacking of battery cells 11 along the height direction. In other words, the number of battery cells 11 can be increased in both the first and height directions to increase the capacity of the battery device 100.

[0199] In some embodiments, the battery cell 11 further includes a terminal post and / or a pressure relief structure, which are disposed on at least one side of the battery cell 11 along a second direction, where the first direction, the second direction, and the height direction of the battery device 100 intersect.

[0200] It is understandable that the individual battery cells 11 of the battery layer are arranged along the first direction, and the battery layers are stacked along the height direction of the battery device 100. Therefore, it is not convenient to set up the terminals and / or pressure relief structures in the first direction and the height direction of the battery device 100. For example, if the terminals and / or pressure relief structures are set up in the first direction or the height direction of the battery device 100, then the terminals and / or pressure relief structures need to be avoided, which is not conducive to improving the structural compactness.

[0201] Thus, when the battery cells 11 are stacked along the first direction, the terminals are located on the sides of the battery cells 11, facilitating the electrical connection of multiple battery cells 11 to achieve series and / or parallel connections. It should be noted that the terminals include positive and negative terminals. During the charging and discharging process of the battery, the positive and negative terminals are electrically connected to form a current loop. Alternatively, the positive and / or negative terminals of multiple battery cells 11 can be electrically connected to achieve series and / or parallel connections.

[0202] In this embodiment, by placing the terminal post and / or pressure relief structure on at least one side of the battery cell 11 along the second direction, it is beneficial to improve the structural compactness of the battery device 100 and also to reduce the possibility of damage to the terminal post and / or pressure relief structure during the stacking of battery cells 11 and / or battery layers.

[0203] In the description of this disclosure, references to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the embodiments of this disclosure. In this disclosure, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine the different embodiments or examples described in this disclosure and the features of the different embodiments or examples without contradiction.

[0204] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A battery device, characterized in that, include: A housing assembly having a receiving space, the receiving space being divided into at least two receiving areas in a first plane, the housing assembly including a frame; A battery assembly comprising at least two battery packs, with at least one battery pack placed in each of the receiving areas, each battery pack comprising multiple battery layers stacked in the height direction of the battery device, each battery layer comprising a plurality of battery cells arranged along a first direction; wherein the first plane is parallel to the first direction and perpendicular to the height direction of the battery device; the battery assembly comprising at least one end plate connected to the frame; A thermal management component includes at least one heat exchanger, the at least one heat exchanger having at least one medium flow channel inside for conducting a heat exchange medium for exchanging heat with multiple battery layers; wherein the heat exchanger is disposed between the multiple battery layers, the heat exchanger is bonded to the battery layers by adhesive, both ends of the heat exchanger along a first direction are connected to an end plate, the heat exchanger is fastened, snapped, or welded to the end plate, and the heat exchanger is used to support at least a portion of the battery layers; The thermal management component further includes a heating element and a current collector, and the heating element is disposed between the heat exchanger and the battery layer; the multi-layer battery layer includes a first battery layer and a second battery layer, the second battery layer is located above the first battery layer, and the heating element is disposed between the heat exchanger and the first battery layer; The heat exchanger includes two heat exchange plates, which are stacked to form the medium flow channel between the two heat exchange plates. Each heat exchange plate has a protrusion, and the medium flow channel is formed within the protrusion. The current collector is provided with a current collection space and an inlet and an outlet that are both connected to the current collection space. The current collection space is connected to at least a portion of the medium flow channel.

2. The battery device according to claim 1, characterized in that, At least a portion of the battery pack is arranged along the first direction; and / or, At least a portion of the battery pack is arranged along a second direction, which intersects the first direction and is parallel to the first plane.

3. The battery device according to claim 1, characterized in that, The battery layer has end plates at both ends along the first direction.

4. The battery device according to claim 1, characterized in that, At least a portion of the battery packs share the heat exchanger.

5. The battery device according to claim 1, characterized in that, The at least two battery packs include a first battery pack and a second battery pack, the first battery pack and the second battery pack are arranged along the first direction, and the first battery pack and the second battery pack share the heat exchanger.

6. The battery device according to claim 5, characterized in that, The first battery pack includes a first battery layer and a second battery layer, with the second battery layer located above the first battery layer; the second battery pack includes a third battery layer and a fourth battery layer, with the fourth battery layer located above the third battery layer. The at least one heat exchanger includes a first heat exchanger located between the first battery layer and the second battery layer, and between the third battery layer and the fourth battery layer.

7. The battery device according to claim 6, characterized in that, The battery assembly includes at least two end plates, and the end plates are disposed at both ends of the battery layers of the first battery pack and / or the second battery pack along the first direction.

8. The battery device according to claim 7, characterized in that, The end plate includes a first end plate, a second end plate, and a third end plate spaced apart along the first direction, the second battery layer is disposed between the first end plate and the second end plate, and the fourth battery layer is disposed between the second end plate and the third end plate.

9. The battery device according to claim 7, characterized in that, The end plate includes a fourth end plate, which is disposed between the first battery layer and the third battery layer.

10. The battery device according to claim 5, characterized in that, The at least two battery packs further include a third battery pack and a fourth battery pack, the third battery pack and the fourth battery pack are arranged along the first direction, the third battery pack and the first battery pack are arranged along the second direction, the fourth battery pack and the second battery pack are arranged along the second direction, the third battery pack and the fourth battery pack share the heat exchanger, the second direction intersects the first direction and is parallel to the first plane.

11. The battery device according to claim 1, characterized in that, The at least one heat exchanger includes a second heat exchanger and a third heat exchanger, the second heat exchanger and the third heat exchanger are arranged along a second direction, the second direction intersects with the first direction and is parallel to the first plane; wherein the second heat exchanger and the third heat exchanger are connected in series or in parallel.

12. The battery device according to claim 11, characterized in that, The second heat exchanger includes a first inlet and a first outlet, the third heat exchanger includes a second inlet and a second outlet, the thermal management assembly includes a connecting pipe, the first outlet and the second inlet are connected through the connecting pipe, and the first inlet and the second outlet are connected to the outside of the housing assembly.

13. The battery device according to any one of claims 1 to 12, characterized in that, The dimensions of the battery cell along the height direction of the battery device and the dimensions of the battery cell along the first direction are smaller than the dimensions of the battery cell along the second direction. The second direction intersects the first direction and is parallel to the first plane. The dimensions of the battery cell along the second direction are in the range of 300mm to 1200mm.

14. The battery device according to any one of claims 1 to 12, characterized in that, The battery cell further includes a terminal post and / or a pressure relief structure, the terminal post and / or pressure relief structure being disposed on at least one side of the battery cell along a second direction, the second direction intersecting the first direction and being parallel to the first plane.

15. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1 to 14.

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