Battery device and electric device

Abstract

The embodiment of the invention provides a battery device and a power utilization device. The battery device comprises a box body assembly, a heat management assembly and a battery assembly, the box body assembly is provided with a containing space, and the containing space is divided into at least two containing areas in a first plane. The battery assembly comprises at least two battery packs, and at least one battery pack is placed in each containing area. Each battery pack comprises a plurality of battery layers stacked in the height direction of the battery device, and each battery layer comprises a plurality of battery cells arranged in the first direction. The heat management assembly comprises at least one heat exchange part, at least one medium runner is arranged in the at least one heat exchange part, the at least one medium runner is used for conducting a heat exchange medium, and the heat exchange medium is used for conducting heat exchange with the multiple battery layers. And the heat exchange pieces are arranged among the multiple battery layers and are used for bearing at least part of the battery layers. The battery device provided by the embodiment of the invention is beneficial to improving the electric quantity and the energy density of the battery device.

Description

Technical Field

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

[0002] In a new energy vehicle equipped with a battery device, the battery device can be used to provide power wholly or partially. In related technologies, a single-layer battery layer arrangement is adopted, but a single-layer battery device may have problems such as low energy density and limited power. Therefore, improving the energy density and power of the battery device has become an important research direction in this field. Summary of the Invention

[0003] In view of this, embodiments of the present application are expected to provide a battery device and an electrical device, which are beneficial to improving the energy density and power of the battery device.

[0004] To this end, a first aspect of the embodiments of the present application provides a battery device, including: A box body assembly, the box body assembly having an accommodation space, and the accommodation space being partitioned into at least two accommodation areas in a first plane; A battery assembly, the battery assembly including at least two battery groups, at least one of the battery groups being placed in each of the accommodation areas, each of the battery groups including multiple battery layers stacked in the height direction of the battery device, and each of the battery layers including multiple battery cells arranged in a first direction; wherein, the first plane is parallel to the first direction and perpendicular to the height direction of the battery device; A thermal management assembly, the thermal management assembly including at least one heat exchange member, the interior of the at least one heat exchange member having at least one medium flow channel for conducting a heat exchange medium, the heat exchange medium being used for exchanging heat with the multiple battery layers; wherein, the heat exchange member is disposed between the multiple battery layers, and the heat exchange member is used for carrying at least part of the battery layers.

[0005] The battery device provided by the embodiment of the present application includes a box body assembly and a battery assembly. The battery assembly is disposed in the accommodation space of the box body assembly, and the box body assembly plays a role in protecting the battery assembly. By partitioning the accommodation space into at least two accommodation areas in a first plane, and setting the battery assembly to include at least two battery groups, and each battery group includes multiple battery layers stacked in the height direction of the battery device, and at least one battery group is placed in each accommodation area. In this way, on the one hand, it is beneficial to increase the power of the battery device, and on the other hand, it is also beneficial to make full use of the space inside the box body assembly, improving the energy density of the battery device. In addition, by disposing the heat exchange member between multiple battery layers, heat exchange can be simultaneously performed on the battery layers located on opposite sides of the heat exchange member, which is beneficial to improving the heat exchange efficiency of the heat exchange member for the battery layers. That is to say, while increasing the energy density of the battery device, the heat exchange efficiency can also be improved. In addition, the heat exchange member is used to carry at least part of the battery layers, that is to say, there is no need to additionally provide parts for supporting the battery layers, which is beneficial to reducing the number of components and lowering the cost.

[0006] In some embodiments, at least part of the battery groups are arranged along the first direction.

[0007] That is to say, the arrangement direction of at least part of the battery groups is the same as the arrangement direction of the battery cells of the battery layers.

[0008] In some embodiments, at least part of the battery groups are arranged along a second direction, the second direction intersects with the first direction, and is parallel to the first plane.

[0009] That is to say, the arrangement direction of at least part of the battery groups intersects with the arrangement direction of the battery cells of the battery layers.

[0010] In still other embodiments, part of the battery groups are arranged along the first direction, and another part of the battery groups are arranged along the second direction.

[0011] 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.

[0012] Here, the end plate is used to constrain the battery layer in the first direction and at least bear the expansion force of the battery cells. The expansion force here specifically refers to the acting force exerted on the box body assembly due to the expansion and deformation of the battery cells. As an example, the end plate mainly bears the expansion force along the first direction.

[0013] In some embodiments, at least part of the battery groups share the heat exchange member.

[0014] That is to say, the same heat exchange component can not only exchange heat with different battery layers of the same battery pack, but also exchange heat with different battery packs, which is beneficial to further simplify the structure and reduce the number of heat exchange components. Thus, it is beneficial to reduce costs and improve assembly efficiency.

[0015] 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 exchange component.

[0016] Thus, on the one hand, it is beneficial to further simplify the structure and reduce the number of heat exchange components, thereby reducing costs and improving assembly efficiency. On the other hand, it is also convenient for the setting of the heat exchange component.

[0017] In some embodiments, the first battery pack includes a first battery layer and a second battery layer, and the second battery layer is located above the first battery layer; the second battery pack includes a third battery layer and a fourth battery layer, and the fourth battery layer is located above the third battery layer; The at least one heat exchange component includes a first heat exchange component, and the first heat exchange component is located between the first battery layer and the second battery layer and between the third battery layer and the fourth battery layer.

[0018] Exemplarily, the first heat exchange component 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 to simultaneously exchange heat with the first battery pack and the second battery pack.

[0019] In some embodiments, the battery assembly includes at least one end plate, and the end plate is provided at at least one end of the battery layer of the first battery pack and / or the second battery pack along the first direction.

[0020] 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 bear the expansion force of the battery cells. The expansion force here specifically refers to the force exerted on the box assembly due to the expansion deformation of the battery cells. As an example, the end plate mainly bears the expansion force along the first direction.

[0021] In some embodiments, the end plate includes a first end plate, a second end plate, and a third end plate that are 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.

[0022] In this embodiment, by sharing the second end plate between the second battery layer and the fourth battery layer, while achieving the separation of the accommodation area in the first plane of the accommodation space, it is beneficial to reduce the number of end plates, thereby reducing costs and improving assembly efficiency. In addition, the occupied space can also be reduced, which is beneficial to improving the energy density and battery capacity.

[0023] In some embodiments, the end plate includes a fourth end plate, and the fourth end plate is disposed between the first battery layer and the third battery layer.

[0024] In this embodiment, by providing a fourth end plate disposed between the first battery layer and the third battery layer, while achieving the separation of the accommodation area in the first plane of the accommodation space, it is beneficial to reduce the number of end plates, thereby reducing costs and improving assembly efficiency. In addition, the occupied space can also be reduced, which is beneficial to improving the energy density and battery capacity.

[0025] In some embodiments, the heat exchange member is fixedly connected, snap-connected or welded to the end plate.

[0026] 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 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 exchange member, the second direction intersects with the first direction and is parallel to the first plane.

[0027] In this embodiment, it is beneficial to reduce the number of heat exchange members, thereby reducing costs, improving assembly efficiency, and also being beneficial to improving the energy density and battery capacity.

[0028] In some embodiments, the at least one heat exchange member includes a second heat exchange member and a third heat exchange member. The second heat exchange member and the third heat exchange member are arranged along the second direction, the second direction intersects with the first direction and is parallel to the first plane; wherein, the second heat exchange member and the third heat exchange member are connected in series or in parallel.

[0029] Here, the second heat exchange member and the third heat exchange member can be connected in series or in parallel according to actual requirements.

[0030] In some embodiments, the second heat exchange member includes a first inlet and a first outlet, the third heat exchange member includes a second inlet and a second outlet, the heat management assembly includes a connecting pipe, the first outlet and the second inlet are communicated through the connecting pipe, and the first inlet and the second outlet are communicated to the outside of the box body assembly.

[0031] Here, the first inlet and the second outlet are both connected to the medium flow channel of the second heat exchanger, and the second inlet and the second outlet are both connected to the medium flow channel of the third heat exchanger. The first inlet and the second outlet are used to be connected to the pipelines of a liquid storage device such as an air conditioning system or a water tank of a vehicle or an electrical device. The first outlet is connected to the second inlet through a connecting pipe, that is to say, the second heat exchanger and the third heat exchanger are connected in series through the connecting pipe.

[0032] In some embodiments, the size of the battery cell along the height direction of the battery device and the size of the battery cell along the first direction are smaller than the size of the battery cell along the second direction. The second direction intersects with the first direction and is parallel to the first plane. The size of the battery cell along the second direction is in the range of 300 mm to 1200 mm.

[0033] In this embodiment, by setting the size of the battery cell along the second direction to be in the range of 300 mm to 1200 mm, the capacitance of the battery device and the assembly efficiency can be taken into account.

[0034] In some embodiments, the battery cell further includes a terminal post and / or a pressure relief structure. The terminal post and / or the pressure relief structure is disposed on at least one side of the battery cell along the second direction. The second direction intersects with the first direction and is parallel to the first plane.

[0035] In this embodiment, by disposing the terminal post and / or the pressure relief structure on at least one side of the battery cell along the second direction, on the one hand, it is beneficial to improve the structural compactness of the battery device, and on the other hand, it is also beneficial to reduce the damage to the terminal post and / or the pressure relief structure during the stacking process of the battery cells and / or battery layers.

[0036] A second aspect of the embodiments of the present application provides an electrical device, including the battery device described above.

[0037] The battery device of the power consumption device provided by the embodiment of the present application includes a box body assembly and a battery assembly. The battery assembly is arranged in the accommodation space of the box body assembly, and the box body assembly plays a protective role for the battery assembly. By partitioning the accommodation space into at least two accommodation areas in a first plane, and setting the battery assembly to include at least two battery groups, and each battery group includes multiple battery layers stacked in the height direction of the battery device, and placing at least one battery group in each accommodation area. In this way, on the one hand, it is beneficial to increase the power of the battery device, and on the other hand, it is also beneficial to make full use of the space in the box body assembly, improving the energy density of the battery device. In addition, by arranging the heat exchange member between the multiple battery layers, heat exchange can be simultaneously performed on the battery layers on opposite sides of the heat exchange member, which is beneficial to improving the heat exchange efficiency of the heat exchange member for the battery layers. That is to say, while increasing the energy density of the battery device, the heat exchange efficiency can also be improved. In addition, the heat exchange member is used to carry at least part of the battery layers, that is, there is no need to additionally set parts for supporting the battery layers, which is beneficial to reducing parts and costs. Description of the Drawings

[0038] Figure 1 Schematic structural diagram of a vehicle provided by some embodiments of the present disclosure; Figure 2 Exploded perspective view of a battery device provided by some embodiments of the present disclosure; Figure 3 Partial exploded perspective view of a battery device provided by the first embodiment of the present disclosure; Figure 4 Partial exploded perspective view of a battery device provided by the second embodiment of the present disclosure; Figure 5 Top view of a battery device provided by some embodiments of the present disclosure with the first box body omitted; Figure 6 is Figure 5 Cross-sectional view taken along the A-A direction in

[0039] Description of the Reference Numerals 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. Box assembly; 21. First box; 22. Second box; 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 device; 200. Controller; 300. Motor; 1000. Vehicle. DETAILED DESCRIPTION

[0040] If not otherwise specified, all embodiments and optional embodiments of the present disclosure may be combined with each other to form a new technical solution.

[0041] Unless otherwise specified, all technical features and optional technical features of the present disclosure can be combined with each other to form a new technical solution.

[0042] With the development of clean energy, more and more devices use electric energy as driving energy, and then power batteries that can store more electric energy and can be charged and discharged repeatedly are developing rapidly, such as lithium-ion batteries. Among them, power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields.

[0043] In the embodiment of the present disclosure, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0044] The battery cells may be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., but the embodiments of the present disclosure are not limited thereto.

[0045] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, which is arranged between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and released back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0046] The electrode assembly can be in a wound structure, a stacked structure, or a hybrid structure of winding and stacking.

[0047] In some embodiments, the electrode assembly is in a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0048] In some embodiments, the electrode assembly is in a stacked structure.

[0049] As an example, multiple positive electrode sheets and multiple negative electrode sheets can be respectively provided, and the multiple positive electrode sheets and the multiple negative electrode sheets are alternately stacked.

[0050] As an example, multiple positive electrode sheets can be provided, and the negative electrode sheet is folded to form multiple stacked folding segments, and a positive electrode sheet is clamped between adjacent folding segments.

[0051] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form multiple stacked folding segments.

[0052] As an example, multiple separators can be provided and are respectively arranged between any adjacent positive electrode sheet or negative electrode sheet.

[0053] As an example, the separators can be continuously arranged and are arranged between any adjacent positive electrode sheet or negative electrode sheet by folding or winding.

[0054] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, prismatic, etc.

[0055] In some embodiments, the electrode assembly is provided with tabs, and the tabs can conduct current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0056] In some embodiments, the battery cell can include a housing. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc. In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing plays a role in protecting the electrode assembly, and a sealing bag is further included between the housing and the electrode assembly, and the sealing bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating part or an aluminum-plastic film. When the housing is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0057] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc., and the present disclosure has no particular limitation.

[0058] In some embodiments, the outer shell includes an end cap and a housing. The housing is provided with an opening, and the end cap covers the opening. The housing may be provided with one or more openings. The end cap may also be provided in one or more numbers.

[0059] In some embodiments, at least one electrode terminal is provided on the outer shell, and the electrode terminal is electrically connected to the tab. The electrode terminal may be directly connected to the tab or indirectly connected to the tab through a current collector member. The electrode terminal may be provided on the end cap or on the housing.

[0060] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0061] In the related art, a single-layer battery layer arrangement is adopted, but the single-layer battery device may have problems such as low energy density and limited power. Therefore, improving the energy density and power of the battery device has become an important research direction in this field.

[0062] In view of this, in order to improve the energy density and power of the battery device, the embodiments of the present disclosure provide a battery device, which includes a box body assembly, a thermal management assembly, and a battery assembly. The box body assembly has an accommodation space, and the accommodation space is divided into at least two accommodation areas in a first plane. The battery assembly includes at least two battery groups, and at least one battery group is placed in each accommodation area. Each battery group includes multiple battery layers stacked in the height direction of the battery device, and each battery layer includes multiple battery cells arranged in a first direction. Wherein, 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 exchange member, and at least one medium flow channel is provided inside the at least one heat exchange member. The at least one medium flow channel is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the multiple battery layers; wherein, the heat exchange member is arranged between the multiple battery layers, and the heat exchange member is used to carry at least part of the battery layers.

[0063] The battery device provided by the embodiment of the present application includes a box body assembly and a battery assembly. The battery assembly is disposed in the accommodation space of the box body assembly, and the box body assembly plays a protective role for the battery assembly. By partitioning the accommodation space into at least two accommodation areas in a first plane, and setting the battery assembly to include at least two battery groups, and each battery group includes multiple battery layers stacked in the height direction of the battery device, and placing at least one battery group in each accommodation area. In this way, on the one hand, it is beneficial to increase the power of the battery device, and on the other hand, it is also beneficial to make full use of the space inside the box body assembly, improving the energy density of the battery device. In addition, by disposing the heat exchange member between multiple battery layers, heat exchange can be simultaneously performed on the battery layers located on opposite sides of the heat exchange member, which is beneficial to improving the heat exchange efficiency of the heat exchange member for the battery layers. That is to say, while increasing the energy density of the battery device, the heat exchange efficiency can also be improved. In addition, the heat exchange member is used to carry at least part of the battery layers, that is to say, there is no need to additionally provide parts for supporting the battery layers, which is beneficial to reducing components and costs.

[0064] The technical solutions described in the embodiments of the present disclosure are applicable to electrical devices using battery devices. The electrical device includes the battery device of any embodiment of the present disclosure, and the battery device is used to provide electrical energy.

[0065] The electrical device can 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 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or an extended-range electric vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, for example, an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator, a planer, etc. The embodiments of the present disclosure do not make special restrictions on the above-mentioned electrical devices.

[0066] It should be noted that the technical solutions described in the embodiments of the present disclosure are not only limited to the battery devices described above, but also applicable to all electrical devices and energy storage devices including battery devices. However, for the sake of simplicity of description, the following embodiments will be described by taking an electric vehicle as an example.

[0067] Please refer to Figure 1, inside the vehicle 1000, a controller 200, a motor 300, and a battery device 100 can be provided. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be provided at the bottom, the front end, or the rear end of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000 and is used for the circuit system of the vehicle 1000, such as the working power requirements for starting, navigation, and running of the vehicle 1000. In another embodiment of the present disclosure, the battery device 100 can not only be used as the operating power source of the vehicle 1000 but also as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0068] Please refer to Figures 2 to 6 , an embodiment of the present disclosure provides a battery device 100, which includes a box body assembly 20 and a battery pack 10. The box body assembly 20 has an accommodation space, and the accommodation space is divided into at least two accommodation areas in a first plane. The battery pack 10 includes at least two battery packs 10, and at least one battery pack 10 is placed in each accommodation 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 in a first direction. Wherein, the first plane is parallel to the first direction and perpendicular to the height direction of the battery device 100.

[0069] The multi-layer described in the embodiment of the present application refers to a quantity of two or more layers.

[0070] The battery pack 10 including at least two battery packs 10 means that the number of battery packs 10 is two or more.

[0071] To meet different power usage requirements, the battery pack of the battery device 100 includes at least two battery packs 10. Each battery pack 10 includes multiple battery layers stacked in the height direction of the battery device 100. Each layer of battery layers includes multiple battery cells 11. A battery cell 11 refers to the smallest unit that makes up a battery module or a battery pack. The multiple battery cells 11 can be connected in series, in parallel, or in a combined series-parallel connection. A combined series-parallel connection means that there are both series and parallel connections among the multiple battery cells 11. The multiple battery cells 11 can be directly connected in series, in parallel, or in a combined series-parallel connection and then the whole formed by the multiple battery cells 11 is accommodated in the box assembly 20. Of course, in the battery device 100, multiple battery cells 11 can also be first connected in series, in parallel, or in a combined series-parallel connection to form a battery module, and then multiple battery modules are connected in series, in parallel, or in a combined series-parallel connection to form a whole and are accommodated in the box assembly 20. The battery device 100 can also include other structures. For example, the battery device 100 can also include a busbar component for realizing the electrical connection among the multiple battery cells 11. Among them, 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 thereto. The battery cell 11 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0072] The box assembly 20 can be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, etc., or a complex three-dimensional structure composed of a combination of simple three-dimensional structures such as a cuboid, cylinder, or sphere, etc. The material of the box assembly 20 can be an alloy material such as aluminum alloy or ferroalloy, or a polymer material such as polycarbonate or polyisocyanurate foam plastic, or a composite material such as glass fiber reinforced epoxy resin.

[0073] The box assembly 20 is used to encapsulate the battery cells 11, and the box assembly 20 can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells 11.

[0074] Exemplarily, the box assembly 20 is usually a cuboid structure. The length direction and the width direction of the box assembly 20 are both parallel to the horizontal plane, and the length direction of the box assembly 20 is parallel to the longest side of the cuboid structure of the box assembly 20. The height direction of the box assembly 20 is perpendicular to the ground.

[0075] The box assembly 20 is used to accommodate the battery cells 11, and the box assembly 20 can be of various structures. In some embodiments, please refer to Figure 2 and Figure 3 , the box assembly 20 can include a first box body 21 and a second box body 22. The first box body 21 and the second box body 22 are covered with each other to define an accommodation space for accommodating the battery cells 11.

[0076] Exemplarily, please refer to Figure 2 , Figure 5 andFigure 6 The first direction is represented by X, the second direction is represented by Y, and the height direction of the battery device 100 is represented by Z. To improve the sealing performance after the connection between the first box body 21 and the second box body 22, a sealing member, such as sealant, sealing ring, etc., can also be provided between the first box body 21 and the second box body 22.

[0077] Assume that the first box body 21 covers the top of the second box body 22. The first box body 21 can also be called the upper box cover, and the second box body 22 can also be called the lower box cover.

[0078] The accommodation space is divided into at least two accommodation areas in the first plane. At least one battery pack 10 is placed in each accommodation area. That is to say, one battery pack 10 can be placed in each accommodation area, or multiple battery packs 10 can be placed.

[0079] Exemplarily, the battery device 100 includes a structural beam. The structural beam is arranged in the accommodation space to divide the accommodation space into at least two accommodation areas in the first plane. The arrangement of the structural beam is beneficial to making full use of the accommodation space and improving the structural compactness of the battery device 100.

[0080] Exemplarily, the structural beam includes a vertical beam 60, and the vertical beam 60 extends along the first direction.

[0081] Exemplarily, the structural beam includes a cross beam. The cross beam extends along the second direction. The second direction intersects with the first direction and is parallel to the first plane.

[0082] Exemplarily, the cross beam can be an expansion beam, and an expansion beam is provided at at least one end of the battery layer along the first direction.

[0083] The first plane is perpendicular to the height direction of the battery device 100. That is to say, the accommodation space is divided into at least two accommodation areas in a plane perpendicular to the height direction of the battery device 100.

[0084] The battery device 100 provided by the embodiment of the present application includes a box body assembly 20 and a battery pack 10. The battery pack 10 is arranged in the accommodation space of the box body assembly 20, and the box body assembly 20 plays a protective role for the battery pack 10. By dividing the accommodation space into at least two accommodation areas in the first plane, and setting the battery pack 10 to include at least two battery packs 10, and each battery pack 10 includes multiple battery layers stacked in the height direction of the battery device 100, and at least one battery pack 10 is placed in each accommodation area. In this way, on the one hand, it is beneficial to increase the power of the battery device 100, and on the other hand, it is also beneficial to make full use of the space inside the box body assembly 20 and improve the energy density of the battery device 100.

[0085] It should be noted that there are various arrangement methods for each battery pack 10.

[0086] In some embodiments, referring to Figures 5 to 6 , at least part of the battery pack 10 is arranged in the first direction.

[0087] That is to say, the arrangement direction of at least part of the battery pack 10 is the same as the arrangement direction of the battery cells 11 in the battery layer.

[0088] In other embodiments, referring to Figures 2 to 5 , at least part of the battery pack 10 is arranged in the second direction, the second direction intersects with the first direction, and is parallel to the first plane.

[0089] The second direction intersects with the first direction. That is to say, the second direction is not parallel to the first direction. Exemplarily, the second direction is perpendicular to the first direction.

[0090] That is to say, the arrangement direction of at least part of the battery pack 10 intersects with the arrangement direction of the battery cells 11 in the battery layer.

[0091] In still other embodiments, referring to Figure 5 , part of the battery pack 10 is arranged in the first direction, and another part of the battery pack 10 is arranged in the second direction.

[0092] In some embodiments, referring to Figures 2 to 6 , the battery pack 10 includes at least one end plate 50, and the end plate 50 is arranged at at least one end of the battery layer in the first direction.

[0093] The number of the end plates 50 can be one or more.

[0094] The end plate 50 can be arranged at one end of the battery layer in the first direction, and the other end can be abutted against the side wall of the box body assembly 20. The end plate 50 can also be arranged at both ends of the battery layer in the first direction.

[0095] In the embodiment where the end plates 50 are arranged at both ends of the battery layer in the first direction, the heat exchange member 31 is connected to the end plates 50 at both ends in the first direction.

[0096] Here, the end plate 50 is used to restrain the battery layer in the first direction and at least bear the expansion force of the battery cells 11. The expansion force here specifically refers to the force exerted on the box body assembly 20 due to the expansion and deformation of the battery cells 11. As an example, the end plate 50 mainly bears the expansion force in the first direction.

[0097] In some related technologies, the end plate 50 is also called an expansion beam.

[0098] The specific structure and material of the end plate 50 are not limited. By way of example, the end plate 50 may be a beam-like structure, and the end plate 50 may be made of any suitable material, such as a metal material, a polymer material, a composite material, etc.

[0099] Exemplarily, please refer to Figure 3 , the box body assembly 20 includes a frame and a bottom wall. The frame is arranged along the edge of the bottom wall. The frame and the bottom wall jointly enclose a receiving space, and the end plate 50 is connected to the frame. It can be understood that the heat exchange member 31 can transfer the force received to the end plate 50, and the end plate 50 can transfer the force received 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 exchange member 31.

[0100] Exemplarily, both ends of the end plate 50 in the second direction are connected to the frame.

[0101] Exemplarily, it may be to first connect the end plate 50 to the frame and then assemble the battery layer, or it may be to first assemble the end plate 50 with the battery layer and then assemble the pre-assembled part of the end plate 50 and the battery layer to the frame.

[0102] Of course, the end plate 50 may also be connected to the bottom wall of the box body assembly 20.

[0103] In this embodiment, by having end plates 50 at at least one end of the battery layer in the first direction, the end plates 50 are used to constrain the battery layer in the first direction and at least used to bear the expansion force of the battery cells 11. In this way, it is beneficial to improve the reliability of the battery device 100.

[0104] The specific connection manner between the heat exchange member 31 and the end plate 50 is not limited, and it may be a fastening connection, a clamping connection or a welding connection, as long as the force received by the heat exchange member 31 can be transferred to the end plate 50.

[0105] In this embodiment, by having end plates 50 at at least one end of the battery layer in the first direction and connecting at least one end of the heat exchange member 31 in the first direction to the end plate 50, in this way, it is beneficial for the heat exchange member 31 to transfer the force received through the end plate 50 to the frame, beneficial to improving the support strength for the battery layer, and also beneficial to reducing the possibility of the lower battery layer being crushed due to excessive stacking of the battery layers. Furthermore, while increasing the capacitance of the battery device 100, the reliability of the battery device 100 is improved.

[0106] Exemplarily, the heat exchange member 31 and the battery layer may be adhesively bonded by applying glue. This connection structure is simple and beneficial to improving the heat exchange efficiency between the heat exchange member 31 and the battery layer.

[0107] At least one side of the battery cell 11 in the height direction is adhesively bonded to the thermal management assembly 30.

[0108] In some embodiments, please refer toFigures 2 to 5 The battery device 100 includes a thermal management component 30, and the thermal management component 30 includes at least one heat exchange member 31. At least one medium flow channel is provided inside the at least one heat exchange member 31, and the at least one medium flow channel is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the multi-layer battery layer. Wherein, the heat exchange member 31 is arranged between the multi-layer battery layers, and the heat exchange member 31 is used to carry at least part of the battery layers.

[0109] It should be noted that the specific type of the heat exchange medium is not limited herein, as long as it can achieve a heat exchange effect on the battery cell 11, for example, it can be gaseous or liquid. In the embodiments of the present disclosure, the heat exchange medium is taken as a coolant for description.

[0110] It should be noted that the specific number of the medium flow channels is not limited herein. It can be one or multiple.

[0111] In this embodiment, by arranging the heat exchange member 31 between the multi-layer battery layers, heat exchange can be simultaneously performed on the battery layers located on opposite sides of the heat exchange member 31, which is beneficial to improving the heat exchange efficiency of the heat exchange member 31 for the battery layers. That is to say, while increasing the energy density of the battery device 100, the heat exchange efficiency can also be improved. In addition, the heat exchange member 31 is used to carry at least part of the battery layers, that is to say, there is no need to additionally provide parts for supporting the battery layers, which is beneficial to reducing parts and costs.

[0112] The specific structure of the heat exchange member 31 is not limited herein.

[0113] Exemplarily, the heat exchange member 31 includes two heat exchange plates, and the two heat exchange plates are stacked to form a medium flow channel therebetween.

[0114] Exemplarily, the heat exchange plate is in a plate-like structure and can have a certain structural strength and support strength, which is beneficial to improving the overall structural strength and stability of the thermal management component 30.

[0115] Exemplarily, the heat exchange plate can also be stamped or welded into a specific structure according to requirements for functions such as support.

[0116] Exemplarily, please refer to Figures 2 to 4 The thermal management component 30 further includes a liquid inlet and a liquid outlet, and both the liquid inlet and the liquid outlet are communicated with the medium flow channel.

[0117] Here, the liquid inlet and the liquid outlet of the thermal management component 30 can be used to connect to the pipelines of a liquid storage device such as an air conditioning system or a water tank of a whole vehicle or an electric device.

[0118] 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 a 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, completing the heat exchange of the battery cell 11.

[0119] Here, the heat exchange between the thermal management component 30 and the battery cell 11 can be to dissipate heat from the battery cell 11 or to heat the battery cell 11.

[0120] The principle of the thermal management component 30 dissipating heat from 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 during the operation of the battery cell 11, the heat exchange medium flows out through the liquid outlet of the thermal management component 30, releasing heat and completing the cooling and heat dissipation of the battery cell 11.

[0121] 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 to heat the battery cell 11. After that, the heat exchange medium flows out through the liquid outlet of the thermal management component 30, completing the heating of the battery cell 11.

[0122] Here, by making at least one heat exchange plate have a convex portion and forming a medium flow channel within the convex portion, that is to say, the convex portion can be set into a required shape according to needs, which is beneficial to improving the design flexibility of the medium flow channel.

[0123] Exemplarily, the heat exchange plate can be formed with a convex portion by stamping.

[0124] Here, the specific material of the heat exchange plate is not limited herein.

[0125] In some embodiments, the heat exchange plate is set as a metal plate. Exemplarily, the material of the heat exchange plate can be, for example, aluminum alloy, steel, etc.

[0126] The materials of different heat exchange plates can be the same or different.

[0127] In this embodiment, by setting the heat exchange plate as a metal plate, the metal plate has both good structural strength and good heat conduction performance. That is to say, while meeting a certain heat exchange efficiency of the heat exchange member 31, the heat exchange plate can also have a certain structural strength.

[0128] Exemplarily, at least two heat exchange plates are welded together. That is to say, the heat exchange plates are connected by welding to form the heat exchange member 31. In this way, it is beneficial to improve the reliability of the connection structure between the heat exchange plates.

[0129] Exemplarily, the heat exchange plates are connected by brazing.

[0130] Brazing can combine dissimilar metals (such as aluminum-based composite materials) through a hot rolling composite process, endowing the material with high mechanical strength, corrosion resistance, and anti-fatigue characteristics, making it suitable for load-bearing and harsh environments. Additionally, the brazed joints have good airtightness and liquid tightness, supporting the dissimilar connection of various metals and alloys. Moreover, the size and path of the medium flow channels can be freely designed, making it suitable for complex scenarios where the heat source distribution is irregular or the space is limited.

[0131] Of course, the heat exchange member 31 can include a corrugated tube, that is, the medium flow channel can be linear, and the medium flow channel penetrates through both ends of at least one heat exchange member 31 along the first direction.

[0132] The thermal management assembly 30 further includes a current collector, which is provided with a current collection space, an inlet and an outlet both communicating with the current collection space, and the current collection space communicates with at least a part of the medium flow channels.

[0133] In some embodiments, referring to Figures 5 to 6 ..., at least part of the battery packs 10 share the heat exchange member 31.

[0134] Here, it can be that part of the battery packs 10 share one heat exchange member 31, or all of the battery packs 10 share one heat exchange member 31.

[0135] That is to say, in addition to being able to exchange heat with different battery layers of the same battery pack 10, the same heat exchange member 31 can also exchange heat with different battery packs 10, which is conducive to further simplifying the structure and reducing the number of heat exchange members 31. Thus, it is beneficial to reduce costs and improve assembly efficiency.

[0136] In some embodiments, referring to Figures 5 to 6 ..., at least two battery packs 10 include a first battery pack 12 and a second battery pack 13, the first battery pack 12 and the second battery pack 13 are arranged along the first direction, and the first battery pack 12 and the second battery pack 13 share the heat exchange member 31.

[0137] That is to say, 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.

[0138] The first battery pack 12 and the second battery pack 13 share the heat exchange member 31, that is to say, a part of this heat exchange member 31 is arranged between the battery layers of the first battery pack 12, and another part is arranged between the battery layers of the second battery pack 13 to simultaneously achieve heat exchange with the first battery pack 12 and the second battery pack 13.

[0139] Thus, on the one hand, it is beneficial to further simplify the structure, reduce the number of heat exchange members 31, thereby reducing costs and improving assembly efficiency. On the other hand, it is also convenient to arrange the heat exchange members 31.

[0140] In some embodiments, refer to Figures 5 to 6 , the first battery pack 12 includes a first battery layer 121 and a second battery layer 122, and the second battery layer 122 is located above the first battery layer 121. The second battery pack 13 includes a third battery layer 131 and a fourth battery layer 132, and the fourth battery layer 132 is located above the third battery layer 131. At least one heat exchange member 31 includes a first heat exchange member 311, and the first heat exchange member 311 is located between the first battery layer 121 and the second battery layer 122, and is also located between the third battery layer 131 and the fourth battery layer 132.

[0141] That is to say, the first battery pack 12 and the second battery pack 13 share the first heat exchange member 311.

[0142] The first heat exchange member 311 is located between the first battery layer 121 and the second battery layer 122, and is also located between the third battery layer 131 and the fourth battery layer 132. That is to say, the first heat exchange member 311 can exchange heat with the first battery pack 12 and the second battery pack 13 simultaneously.

[0143] Exemplarily, the first heat exchange member 311 includes a first part and a second part that communicate with each other. The first part is arranged between the first battery layer 121 and the second battery layer 122, and the second part is arranged between the third battery layer 131 and the fourth battery layer 132 to simultaneously realize heat exchange with the first battery pack 12 and the second battery pack 13.

[0144] In some embodiments, refer to Figures 5 to 6 , the battery pack 10 includes at least one end plate 50, and end plates 50 are arranged at at least one end of the battery layers of the first battery pack 12 and / or the second battery pack 13 along the first direction.

[0145] Here, it can be that end plates 50 are arranged at at least one end of the battery layers of the first battery pack 12 along the first direction, or end plates 50 are arranged at at least one end of the battery layers of the second battery pack 13 along the first direction, or end plates 50 are arranged at at least one end of the battery layers of both the first battery pack 12 and the second battery pack 13 along the first direction.

[0146] 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 is at least used to bear the expansion force of the battery cells 11. The expansion force here specifically refers to the force exerted on the box body assembly 20 due to the expansion and deformation of the battery cells 11. As an example, the end plate 50 mainly bears the expansion force along the first direction.

[0147] In some embodiments, please continue to refer to 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 that are spaced apart along a first direction. The second battery layer 122 is disposed between the first end plate 51 and the second end plate 52, and the fourth battery layer 132 is disposed between the second end plate 52 and the third end plate 53.

[0148] That is to say, 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.

[0149] The first end plate 51, the second end plate 52, and / or the third end plate 53 are connected to the first heat exchange member 311. The first end plate 51, the second end plate 52, and / or the third end plate 53 and the first heat exchange member 311 are, for example, fixedly connected, snap-connected, or welded.

[0150] In this embodiment, by sharing the second end plate 52 between the second battery layer 122 and the fourth battery layer 132, while achieving the separation of the accommodation space into accommodation areas in the first plane, it is beneficial to reduce the number of end plates 50, thereby reducing costs and improving assembly efficiency. In addition, the occupied space can also be reduced, which is beneficial to improving the energy density and battery capacity.

[0151] In some embodiments, please refer to Figures 5 to 6 , the end plate 50 includes a fourth end plate 54, and the fourth end plate 54 is disposed between the first battery layer 121 and the third battery layer 131.

[0152] That is to say, the first battery layer 121 and the third battery layer 131 share the fourth end plate 54.

[0153] Here, at one end of the first battery layer 121 away from the fourth end plate 54, an end plate 50 may or may not be provided, that is, one end of the first battery layer 121 away from the fourth end plate 54 may be abutted against the side wall of the box body assembly 20.

[0154] Similarly, at one end of the third battery layer 131 away from the fourth end plate 54, an end plate 50 may or may not be provided, that is, one end of the third battery layer 131 away from the fourth end plate 54 may be abutted against the side wall of the box body assembly 20.

[0155] Exemplarily, the fourth end plate 54 is connected to the first heat exchange member 311. The fourth end plate 54 and the first heat exchange member 311 are, for example, fixedly connected, snap-connected, or welded.

[0156] In this embodiment, by providing the fourth end plate 54 which is disposed between the first battery layer 121 and the third battery layer 131, while separating the accommodation space into an accommodation area in the first plane, it is beneficial to reduce the number of end plates 50, thereby reducing costs and improving assembly efficiency. In addition, the occupied space can also be reduced, which is beneficial to improving the energy density and battery capacity.

[0157] In some embodiments, referring to Figure 5 , at least two battery packs 10 further 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 the first direction, the third battery pack 14 and the first battery pack 12 are arranged along the second direction, the fourth battery pack 15 and the second battery pack 13 are arranged along the second direction, and the third battery pack 14 and the fourth battery pack 15 share the heat exchange member 31.

[0158] That is to say, 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.

[0159] The first battery pack 12 and the second battery pack 13 share the heat exchange member 31, and the third battery pack 14 and the fourth battery pack 15 share the heat exchange member 31, that is, two battery packs 10 share one heat exchange member 31.

[0160] In this embodiment, it is beneficial to reduce the number of heat exchange members 31, thereby reducing costs and improving assembly efficiency, and it is also beneficial to improving the energy density and battery capacity.

[0161] In other embodiments, it may also be that the first battery pack 12 and the third battery pack 14 share the same heat exchange member 31, and the second battery pack 13 and the fourth battery pack 15 share the same heat exchange member 31.

[0162] In still other embodiments, it may also be that the first battery pack 12, the second battery pack 13, the third battery pack 14 and the fourth battery pack 15 share the same heat exchange member 31.

[0163] In some embodiments, referring to Figures 2 to 3 , at least two battery packs 10 include the first battery pack 12 and the third battery pack 14, and the first battery pack 12 and the third battery pack 14 are arranged along the second direction.

[0164] In some embodiments, referring to Figures 2 to 4 , at least one heat exchange member 31 includes a second heat exchange member 312 and a third heat exchange member 313. The second heat exchange member 312 and the third heat exchange member 313 are arranged along the second direction. The second direction intersects with the first direction and is parallel to the first plane. Among them, the second heat exchange member 312 and the third heat exchange member 313 are connected in series or in parallel.

[0165] Exemplarily, the second heat exchanger 312 and the third heat exchanger 313 are respectively used for heat exchange of the first battery pack 12 and the third battery pack 14.

[0166] Here, the second heat exchanger 312 and the third heat exchanger 313 can be connected in series or in parallel according to actual requirements.

[0167] In some embodiments, referring 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 heat management assembly 30 includes a connecting pipe, the first outlet 3122 and the second inlet 3131 are communicated through the connecting pipe, and the first inlet 3121 and the second outlet 3132 are communicated to the outside of the box body assembly 20.

[0168] Here, both the first inlet 3121 and the second outlet 3132 are communicated with the medium flow channel of the second heat exchanger 312, and both the second inlet 3131 and the second outlet 3132 are communicated with the medium flow channel of the third heat exchanger 313.

[0169] The first inlet 3121 and the second outlet 3132 are used for connecting with pipelines of a liquid storage device such as an air conditioning system or a water tank of a whole vehicle or an electric device.

[0170] The first outlet 3122 and the second inlet 3131 are communicated through the connecting pipe. That is to say, the second heat exchanger 312 and the third heat exchanger 313 are connected in series through the connecting pipe.

[0171] Here, the connecting pipe can communicate the first outlet 3122 and the second inlet 3131 inside the box body assembly 20, or can communicate the first outlet 3122 and the second inlet 3131 outside the box body assembly 20. In other words, the connecting pipe can be arranged inside the box body assembly 20 or can be arranged outside the box body assembly 20.

[0172] In a relatively cold environment, it may cause the temperature of the battery device 100 to be relatively low, which will also affect the performance of the battery device 100. In the related art, by setting a heating device to heat the heat exchange medium, so as to heat the battery cell 11, this method has problems of complex structure and high cost.

[0173] In some embodiments, the heat management assembly 30 further includes a heating element, and a heating element is arranged between the heat exchanger 31 and the battery layer.

[0174] Exemplarily, the heating element can be a heating film. Further, the heating element can be an electric heating film.

[0175] Exemplarily, the heating element has a heating resistor inside, and the heating resistor generates heat after being energized to heat the battery layer.

[0176] 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 exchanger 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 exchanger 31. The material of the heat exchanger 31 itself can preferably transfer the heat generated by the heating element to the second battery layer 122. In this way, the heating element can heat two adjacent battery layers (such as the first battery layer 121 and the second battery layer 122) simultaneously, improving the heating efficiency.

[0177] When the battery layer needs to be cooled, the cold 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.

[0178] Exemplarily, 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 are further combined with the first battery layer 121, for example, fixed by gluing. Of course, it can also be that the heating element is first attached to the first battery layer 121, and then the heat exchanger 31, the heating element, and the first battery layer 121 are fixed by gluing.

[0179] In this embodiment, by providing a heating element between the heat exchanger 31 and the battery layer, heating of the battery layers on opposite sides of the heat exchanger 31 can be achieved simultaneously. This structure is simple, has a low cost, and is beneficial to improving the heating efficiency.

[0180] In some embodiments, please refer to Figures 2 to 3 , the dimension h1 of the battery cell 11 in the height direction of the battery device 100 and the dimension h2 of the battery cell 11 in the first direction are smaller than the dimension h3 of the battery cell 11 in the second direction. The first direction, the second direction, and the height direction of the battery device 100 intersect, and the dimension of the battery cell 11 in the second direction is in the range of 300 mm to 1200 mm.

[0181] The dimension of the battery cell 11 in the second direction can be any point value among 300 mm, 350 mm, 400 mm, 450 mm, 500 mm, 560 mm, 600 mm, 650 mm, 700 mm, 780 mm, 800 mm, 830 mm, 860 mm, 900 mm, 950 mm, 1000 mm, 1050 mm, 1100 mm, 1150 mm, 1200 mm or any point value between any two of them.

[0182] Here, h1, h2, and h3 can be measured by measuring tools such as vernier calipers at room temperature before the battery device 100 is used.

[0183] It should be noted that h1, h2, and h3 do not include the dimensions of the terminal posts and / or the pressure relief structure, that is, h1, h2, and h3 can be obtained by measuring the dimensions of the outer shell of the battery cell 11.

[0184] In this embodiment, by setting the dimension of the battery cell 11 in the second direction to be in the range of 300 mm to 1200 mm, the capacitance and assembly efficiency of the battery device 100 can be taken into account.

[0185] Exemplarily, the battery cell 11 in this embodiment can be a blade battery, which is long and thin in shape.

[0186] It can be that the dimension of the battery cell 11 in the height direction of the battery device 100 is greater than the dimension of the battery cell 11 in the first direction, or it can be that the dimension of the battery cell 11 in the height direction of the battery device 100 is less than the dimension of the battery cell 11 in the first direction.

[0187] It can be understood that while facilitating the stacking of the battery cells 11 in the first direction, it is also possible to facilitate the stacking of the battery cells 11 in the height direction. That is to say, the number of battery cells 11 can be increased in the first direction and the height direction to increase the capacitance of the battery device 100.

[0188] In some embodiments, the battery cell 11 further includes terminal posts and / or a pressure relief structure, and the terminal posts and / or the pressure relief structure are disposed on at least one side of the battery cell 11 in the second direction, and the first direction, the second direction, and the height direction of the battery device 100 intersect.

[0189] It can be understood that the battery cells 11 of each battery layer are arranged in the first direction, and the battery layers are stacked in the height direction of the battery device 100. Thus, it is not convenient to arrange the terminal posts and / or the pressure relief structure in the first direction and the height direction of the battery device 100. For example, if the terminal posts and / or the pressure relief structure are arranged in the first direction or the height direction of the battery device 100, it is necessary to avoid the terminal posts and / or the pressure relief structure, which is not conducive to improving the structural compactness.

[0190] In this way, when the battery cells 11 are stacked in the first direction, the terminal posts are disposed on the side of the battery cells 11, which is convenient for electrically connecting multiple battery cells 11 to achieve series and / or parallel connection. It should be noted that the terminal posts include positive terminal posts and negative terminal posts. During the charging and discharging process of the battery, the positive terminal posts and the negative terminal posts are electrically connected to form a current loop, or multiple battery cells 11 can also be electrically connected in series and / or parallel by connecting the positive terminal posts and / or negative terminal posts of multiple battery cells 11.

[0191] In this embodiment, by disposing the terminal post and / or the pressure relief structure on at least one side of the battery cell 11 along the second direction, on the one hand, it is beneficial to improve the structural compactness of the battery device 100, and on the other hand, it is also beneficial to reduce the situation of damaging the terminal post and / or the pressure relief structure during the stacking process of the battery cell 11 and / or the battery layers.

[0192] In the description of the present disclosure, the description with reference to terms such as "in one embodiment", "in some embodiments", "in other embodiments", "in still other embodiments", or "exemplary" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present disclosure. In the present disclosure, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine the different embodiments or examples described in the present disclosure and the features of different embodiments or examples.

[0193] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A box assembly, wherein the box assembly has a receiving space, and the receiving space is divided into at least two receiving areas in a first plane; A battery assembly, wherein the battery assembly comprises at least two battery groups, at least one battery group is placed in each of the accommodating areas, each of the battery groups comprises a plurality of battery layers stacked in the height direction of the battery device, each of the battery layers comprises 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; A thermal management component, wherein the thermal management component includes at least one heat exchange element, wherein the at least one heat exchange element has at least one medium flow channel inside, wherein the at least one medium flow channel is used to conduct a heat exchange medium, and wherein the heat exchange medium is used to exchange heat with multiple battery layers; wherein the heat exchange element is arranged between the multiple battery layers, and wherein the heat exchange element is used to support at least part of the battery layers.

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

3. The battery device according to claim 1, characterized in that: 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.

4. The battery device according to claim 1, characterized in that: At least some of the battery packs share the heat exchange element.

5. The battery device according to claim 1, characterized in that: The at least two battery groups include a first battery group and a second battery group, the first battery group and the second battery group are arranged along the first direction, and the first battery group and the second battery group share the heat exchange element.

6. The battery device according to claim 5, characterized in that: The first battery group includes a first battery layer and a second battery layer, and the second battery layer is located above the first battery layer; the second battery group includes a third battery layer and a fourth battery layer, and the fourth battery layer is located above the third battery layer; The at least one heat exchange element includes a first heat exchange element, and the first heat exchange element is 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 one end plate, and the end plate is provided at least at one end of the battery layer of the first battery group and / or the second battery group 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 disposed between the first battery layer and the third battery layer.

10. The battery device according to claim 7, characterized in that: The heat exchange element is fastened, clamped or welded to the end plate.

11. The battery device according to claim 5, characterized in that: The at least two battery groups further include a third battery group and a fourth battery group, the third battery group and the fourth battery group are arranged along the first direction, the third battery group and the first battery group are arranged along the second direction, the fourth battery group and the second battery group are arranged along the second direction, the third battery group and the fourth battery group share the heat exchange element, and the second direction intersects with the first direction and is parallel to the first plane.

12. The battery device according to claim 1, characterized in that: The at least one heat exchange element includes a second heat exchange element and a third heat exchange element, the second heat exchange element and the third heat exchange element 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 exchange element and the third heat exchange element are connected in series or in parallel.

13. The battery device according to claim 12, characterized in that: The second heat exchange member includes a first inlet and a first outlet, the third heat exchange member includes a second inlet and a second outlet, the thermal management component includes a connecting pipe, the first outlet is connected to the second inlet through the connecting pipe, and the first inlet and the second outlet are connected to the outside of the box assembly.

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

15. The battery device according to any one of claims 1 to 13, characterized in that: The battery cell further includes a pole and / or a pressure relief structure, wherein the pole and / or the pressure relief structure is disposed on at least one side of the battery cell along a second direction, wherein the second direction intersects the first direction and is parallel to the first plane.

16. An electrical device, characterized in that: A battery device comprising any one of claims 1 to 15.

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