Battery device and electrical device

Abstract

An embodiment of the present application provides a battery device and an electrical device. The battery device includes a box body assembly, a thermal management assembly, and a battery assembly. The battery assembly includes multiple battery layers stacked along the height direction of the battery device, and the multiple battery layers are arranged inside the box body assembly. The thermal management assembly includes a heat exchanger and a heater. The interior of the heat exchanger has at least one medium flow channel, 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 battery layers. The heat exchanger is arranged between the multiple battery layers, and the heat exchanger is used to carry at least part of the battery layers. The heater is arranged between the battery layer and the heat exchanger, or the heater is arranged between the battery layer and the box body assembly. The battery device provided by the embodiment of the present application can improve the heat exchange efficiency while increasing the energy density of the battery device, and can improve the cycle performance and service life of the battery device under low-temperature conditions. It is beneficial to simplify the structure and reduce the cost.

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 in whole or in part. In the related art, a single-layer battery layer arrangement is adopted. However, the single-layer battery device may have problems such as low energy density and limited power. In addition, in a relatively cold environment, the temperature of the battery device may be relatively low, which may affect the cycle performance and service life of the battery device, etc. 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 can improve the energy density of the battery device while enhancing the cycle performance of the battery device.

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

[0005] A box body assembly;

[0006] A battery assembly, the battery assembly includes multiple battery layers stacked along the height direction of the battery device, and the multiple battery layers are arranged in the box body assembly;

[0007] A thermal management assembly, the thermal management assembly includes a heat exchange member and a heating member. The interior of the heat exchange member has at least one medium flow channel for conducting a heat exchange medium, and the heat exchange medium is used for heat exchange with the battery layer;

[0008] 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; the heating member is arranged between the battery layer and the heat exchange member, or the heating member is arranged between the battery layer and the box body assembly.

[0009] The battery device provided by the embodiment of the present application includes a box body assembly, a thermal management assembly, and a battery assembly. The battery layer is arranged inside the box body assembly, and the box body assembly plays a protective role for the battery layer. On the one hand, by arranging multiple battery layers, it is beneficial to improve the power of the battery device. In addition, stacking the battery layers along the height direction of the battery device is also beneficial to make full use of the space inside the box body assembly and improve the energy density of the battery device. On the other hand, by arranging 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 layer. That is to say, while improving the energy density of the battery device, the heat exchange efficiency can also be improved. In addition, by arranging a heating member between the battery layer and the heat exchange member, or by arranging a heating member between the battery layer and the box body assembly, when the battery layer needs to be heated, the heat generated by the heating member can be transferred to the battery layer, so that the battery layer can be heated under low-temperature conditions, improving the cycle performance and service life of the battery device. In addition, the structure of heating the battery layer by the heating member is simple and does not require an additional heating device to heat the heat exchange medium, which is beneficial to simplifying the structure and reducing costs. In addition, when the heating member is arranged between adjacent battery layers, the heating member can heat adjacent battery layers simultaneously, improving the heating efficiency.

[0010] In some embodiments, the multiple battery layers include a first battery layer and a second battery layer arranged adjacent to each other, and the second battery layer is located above the first battery layer;

[0011] A first fitting plane is formed on one side of the heat exchange member facing the first battery layer, and the heating member is arranged between the first fitting plane and the first battery layer.

[0012] In this embodiment, by forming a first fitting plane on one side of the heat exchange member facing the first battery layer and arranging the heating member between the first fitting plane and the first battery layer, the heating member can be better matched with the first battery layer and the heat exchange member in this way.

[0013] In some embodiments, the heating member is attached to the first fitting plane.

[0014] Here, by attaching the heating member to the first fitting plane, the arrangement of the heating member is facilitated, so that the heating member can be better attached to the heat exchange member.

[0015] In some embodiments, the heat exchange member includes at least two heat exchange plates. The heat exchange plates include a first heat exchange plate and a second heat exchange plate. A protruding portion is formed by partial regions of the first heat exchange plate. The first heat exchange plate and the second heat exchange plate are stacked, and a medium flow channel is defined between the protruding portion and the second heat exchange plate. The first fitting plane is formed on the side of the second heat exchange plate facing away from the first heat exchange plate.

[0016] In this way, it is beneficial to improve the design flexibility of the heat exchange component, and the size and path of the medium flow channel can be freely designed, which is applicable to complex scenarios with irregular heat source distribution or limited space, and is beneficial to further improve the heat exchange efficiency. In addition, by providing at least one heat exchange plate with a convex portion to form a medium flow channel at the convex portion, it is further beneficial to improve the design flexibility.

[0017] In some embodiments, each of the battery layers includes a plurality of battery monomers arranged in a first direction, the battery assembly further includes at least one end plate, the end plate is provided at at least one end of the battery layer in the first direction, the heat exchange component is connected to the end plate at at least one end in the first direction, and the first direction intersects with the height direction of the battery device.

[0018] In this embodiment, by providing an end plate at at least one end of the battery layer in the first direction and connecting the heat exchange component to the end plate at at least one end in the first direction, in this way, it is beneficial for the heat exchange component to transfer the force received to the frame through the end plate, which is beneficial to improve the support strength of the battery layer, and is also beneficial to reduce 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, the reliability of the battery device is improved.

[0019] In some embodiments, at least one end of the heat exchange component in the first direction forms a first flanging portion, and the first flanging portion is connected to the end plate.

[0020] That is to say, the heat exchange component is turned over towards the end plate to form a first flanging portion, and is connected to the end plate through the first flanging portion. This connection structure is simple and reliable and is easy to form.

[0021] In some embodiments, the heat exchange component is fixedly connected, clamped or welded to the end plate.

[0022] This connection structure is simple and reliable.

[0023] In some embodiments, the heating element is provided at the top of the uppermost battery layer.

[0024] In this way, the top of the uppermost battery layer can be heated, and the reliability of the battery device is further improved.

[0025] In some embodiments, the thermal management component further includes an upper cover, the upper cover is provided at the top of the uppermost battery layer, and the heating element is provided between the upper cover and the uppermost battery layer.

[0026] In this embodiment, by providing an upper cover and arranging a heating element between the upper cover and the uppermost battery layer, it is convenient to arrange the heating element, so that the heating element can better fit with the heat exchange element, and it can play a protective role for the heating element, thereby improving the reliability of the thermal management component.

[0027] In some embodiments, each of the battery layers includes a plurality of battery cells arranged along a first direction, and the battery assembly further includes at least one end plate, and the end plate is arranged at at least one end of the battery layer along the first direction;

[0028] At least one end of the upper cover forms a second flanging portion along the first direction, and the second flanging portion is connected to the end plate.

[0029] That is to say, the upper cover is folded towards the end plate to form a second flanging portion, and is connected to the end plate through the second flanging portion. This connection structure is simple and reliable and is convenient for forming.

[0030] In some embodiments, the second flanging portion is fixedly connected, clamped or welded to the end plate.

[0031] This connection structure is simple and reliable.

[0032] In some embodiments, the dimension of the battery cell along the height direction of the battery device and the dimension of the battery cell along the first direction are smaller than the dimension of the battery cell along the second direction. The first direction, the second direction and the height direction of the battery device intersect, and the dimension 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 dimension of the battery cell along the second direction to be in the range of 300 mm to 1200 mm, the capacitance and assembly efficiency of the battery device can be taken into account.

[0034] In some embodiments, each of the battery layers includes a plurality of battery cells arranged along a first direction, and the battery cell further includes a pole column and / or a pressure relief structure. The pole column and / or the pressure relief structure is arranged on at least one side of the battery cell along the second direction. The first direction, the second direction and the height direction of the battery device intersect.

[0035] In this embodiment, by arranging the pole column 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 pole column and / or the pressure relief structure during the stacking process of the battery cells and / or the battery layers.

[0036] The 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, a thermal management assembly, and a battery assembly. The battery layer is arranged in the box body assembly, and the box body assembly plays a protective role for the battery layer. On the one hand, by arranging multiple battery layers, it is beneficial to improve the power of the battery device. In addition, stacking the battery layers along the height direction of the battery device is also beneficial to make full use of the space in the box body assembly and improve the energy density of the battery device. On the other hand, by arranging the heat exchange member between the 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 layer. That is to say, while improving the energy density of the battery device, the heat exchange efficiency can also be improved. In addition, by arranging a heating member between the battery layer and the heat exchange member, or by arranging a heating member between the battery layer and the box body assembly, when the battery layer needs to be heated, the heat generated by the heating member can be transferred to the battery layer, so that the battery layer can be heated under low-temperature conditions, improving the cycle performance and service life of the battery device. In addition, the structure of heating the battery layer by the heating member is simple and does not require an additional heating device to heat the heat exchange medium, which is beneficial to simplifying the structure and reducing costs. In addition, when the heating member is arranged between adjacent battery layers, the heating member can heat adjacent battery layers simultaneously, improving the heating efficiency. Description of the Drawings

[0038] Figure 1 Schematic structural diagram of a vehicle provided by an embodiment of the present disclosure;

[0039] Figure 2 Schematic structural diagram of a battery device provided by an embodiment of the present disclosure;

[0040] Figure 3 Schematic exploded perspective view of a battery device provided by an embodiment of the present disclosure;

[0041] Figure 4 Partial schematic exploded perspective view of a battery device provided by the first embodiment of the present disclosure;

[0042] Figure 5 Schematic connection structure diagram of a battery assembly and a heat exchange member provided by an embodiment of the present disclosure;

[0043] Figure 6 is Figure 5 enlarged view of part A in;

[0044] Figure 7 Partial schematic exploded perspective view of a battery device provided by the second embodiment of the present disclosure;

[0045] Figure 8 Schematic connection structure diagram of a partition member and a heat exchange member provided by an embodiment of the present disclosure.

[0046] Description of Reference Numerals

[0047] 10. Battery layer; 11. Battery cell; 111. Post; 12. First battery layer; 13. Second battery layer; 20. Box assembly; 21. First box portion; 22. Second box portion; 30. Thermal management assembly; 31. Heat exchanger; 311. First heat exchange plate; 3111. First surface; 312. Second heat exchange plate; 3121. First mating plane; 313. Raised portion; 314. Medium flow channel; 31 5. First flange portion; 316. First flow channel group; 317. Second flow channel group; 318. Liquid inlet; 319. Liquid outlet; 32. Heating element; 33. Upper cover; 331. Second flange portion; 40. Blocking element; 50. End plate; 51. First end plate; 52. Second end plate; 53. Third end plate; 54. Fourth end plate; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. DETAILED DESCRIPTION

[0048] Unless otherwise specified, all embodiments and optional embodiments of the present disclosure can be combined with each other to form new technical solutions.

[0049] Unless otherwise specified, all technical features and optional technical features disclosed herein can be combined with each other to form a new technical solution.

[0050] With the development of clean energy, more and more devices are using electricity as a driving force. Consequently, power batteries, such as lithium-ion batteries, that can store large amounts of electricity and undergo multiple charge and discharge cycles are rapidly developing. These 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 vehicles, as well as in aerospace and other fields.

[0051] 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.

[0052] 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., which are not limited in the embodiments of the present disclosure.

[0053] A battery cell typically includes an electrode assembly. This assembly consists of a positive electrode, a negative electrode, and a separator, which is positioned between the positive and negative electrodes. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing the active ions to pass through.

[0054] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of winding and stacking.

[0055] In some embodiments, the electrode assembly is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0056] In some embodiments, the electrode assembly is a stacked structure.

[0057] 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.

[0058] As an example, multiple positive electrode sheets can be provided, and the negative electrode sheet is folded to form multiple folded segments arranged in a stacked manner, and a positive electrode sheet is clamped between adjacent folded segments.

[0059] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form multiple folded segments arranged in a stacked manner.

[0060] As an example, multiple separators can be provided and are respectively arranged between any adjacent positive electrode sheet or negative electrode sheet.

[0061] As an example, the separators can be continuously provided and are arranged between any adjacent positive electrode sheet or negative electrode sheet by folding or winding.

[0062] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, prismatic, etc.

[0063] In some embodiments, the electrode assembly is provided with tabs, and the tabs can conduct current out of the electrode assembly. The tabs include positive tabs and negative tabs.

[0064] 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 sealed bag is further included between the housing and the electrode assembly, and the sealed bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealed 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.

[0065] 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 special limitation.

[0066] 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.

[0067] 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.

[0068] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0069] In a new energy vehicle equipped with a battery device, the battery device can be used to provide power wholly or partially. 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. In addition, in a relatively cold environment, the temperature of the battery device may be relatively low, which may affect the cycle performance and service life of the battery device, etc.

[0070] In view of this, in order to improve the energy density of the battery device while enhancing the cycle performance 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 battery assembly includes multiple battery layers stacked along the height direction of the battery device, and the multiple battery layers are arranged in the box body assembly. The thermal management assembly includes a heat exchange member and a heating member. The interior of the heat exchange member has at least one medium flow channel for conducting a heat exchange medium, and the heat exchange medium is used for heat exchange with the battery layers. Among them, the heat exchange member is arranged between the multiple battery layers and is used to carry at least part of the battery layers. The heating member is arranged between the battery layer and the heat exchange member, or the heating member is arranged between the battery layer and the box body assembly.

[0071] The battery device provided by the embodiments of the present application includes a box body assembly, a thermal management assembly, and a battery assembly. The battery layers are arranged inside the box body assembly, and the box body assembly plays a protective role for the battery layers. On the one hand, by arranging multiple battery layers, it is beneficial to improve the power of the battery device. In addition, stacking the battery layers along the height direction of the battery device is also beneficial to make full use of the space inside the box body assembly, thereby improving the energy density of the battery device. On the other hand, by arranging the heat exchange member between the 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 improve the heat exchange efficiency of the heat exchange member for the battery layers. That is to say, while improving the energy density of the battery device, the heat exchange efficiency can also be enhanced. In addition, by arranging a heating member between the battery layer and the heat exchange member, or by arranging a heating member between the battery layer and the box body assembly, when the battery layer needs to be heated, the heat generated by the heating member can be transferred to the battery layer, so that the battery layer can be heated under low-temperature conditions, thereby improving the cycle performance and service life of the battery device. In addition, the structure of heating the battery layer by the heating member is simple and does not require an additional heating device to heat the heat exchange medium, which is beneficial to simplify the structure and reduce costs. In addition, when the heating member is arranged between adjacent battery layers, the heating member can heat the adjacent battery layers simultaneously, improving the heating efficiency.

[0072] The technical solutions described in the embodiments of the present disclosure are applicable to electrical devices using the battery device. The electrical device includes the battery device of any embodiment of the present disclosure, and the battery device is used to provide electrical energy.

[0073] 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, an electric planer, etc. The embodiments of the present disclosure do not impose special restrictions on the above-mentioned electrical devices.

[0074] It should be noted that the technical solutions described in the embodiments of the present disclosure are not only limited to the battery device described above, but also applicable to all electrical devices and energy storage devices including the battery device. However, for the sake of simplicity of description, the following embodiments will be described by taking an electric vehicle as an example.

[0075] 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 for power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000 and for the circuit system of the vehicle 1000, such as for the power consumption requirements during starting, navigation, and operation 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 be used as the driving power source of the vehicle 1000 to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0076] Please refer to Figures 2 to 8 , an embodiment of the present disclosure provides a battery device 100. The battery device 100 includes a box body assembly 20, a thermal management assembly 30, and a battery assembly. The battery assembly includes multiple battery layers 10 stacked along the height direction of the battery device 100. The multiple battery layers 10 are arranged inside the box body assembly 20. The thermal management assembly 30 includes a heat exchange member 31 and a heating member 32. The interior of the heat exchange member 31 has at least one medium flow channel 314. The at least one medium flow channel 314 is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the battery layer 10. Among them, the heat exchange member 31 is arranged between the multiple battery layers 10, and the heat exchange member 31 is used to carry at least part of the battery layers 10. The heating member 32 is arranged between the battery layer 10 and the heat exchange member 31, or the heating member 32 is arranged between the battery layer 10 and the box body assembly 20.

[0077] The term "multiple layers" as used in the embodiments of the present application refers to two or more layers in number.

[0078] To meet different power usage requirements, the battery assembly of the battery device 100 includes multiple battery layers 10 stacked in the height direction. Each battery layer 10 includes multiple battery cells 11, and 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 combination of series and parallel (mixed connection). A mixed 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 mixed connection together, and then the whole formed by the multiple battery cells 11 is accommodated in the box assembly 20; of course, the battery device 100 can also be in the form that multiple battery cells 11 are first connected in series, in parallel, or in a mixed connection to form battery modules, and then multiple battery modules are connected in series, in parallel, or in a mixed 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] Exemplarily, please refer to Figure 2 、 Figure 7 and Figure 8 , the first direction is represented by X, the second direction is represented by Y, and the height direction of the battery device is represented by Z.

[0083] It should be noted that the specific type of the heat exchange medium is not limited here, as long as it can achieve a heat exchange effect on the battery cells 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.

[0084] It should be noted that the specific number of the medium flow channels 314 is not limited here. It can be one or multiple.

[0085] Exemplarily, please refer to Figures 5 to 6 , the heat exchange member 31 includes at least two heat exchange plates, and the at least two heat exchange plates are stacked to form at least one medium flow channel 314. That is to say, the number of the heat exchange plates is multiple.

[0086] 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.

[0087] Exemplarily, the heat exchange plate can also be stamped or welded to form a specific structure according to requirements for functions such as support.

[0088] Exemplarily, please refer to Figures 7 to 8 , the thermal management component 30 further includes a liquid inlet 318 and a liquid outlet 319, and both the liquid inlet 318 and the liquid outlet 319 are communicated with the medium flow channel 314.

[0089] Here, the liquid inlet 318 and the liquid outlet 319 of the thermal management component 30 are used for connecting with the pipelines of the liquid storage devices such as the air-conditioning system or the water tank of the whole vehicle or the electrical device.

[0090] The principle of the thermal management component 30 for heat exchange with the battery cell 11 is as follows: the heat exchange medium output by the heat exchange medium source (not shown in the figure) enters the medium flow channel 314 through the liquid inlet 318 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 319 of the thermal management component 30, completing the heat exchange with the battery cell 11.

[0091] Here, the heat exchange of the thermal management component 30 with the battery cell 11 can be to dissipate heat from the battery cell 11 or to heat the battery cell 11.

[0092] The principle of the thermal management component 30 for dissipating heat from the battery cell 11 is as follows: the heat exchange medium output by the heat exchange medium source enters the medium flow channel 314 through the liquid inlet 318 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 319 of the thermal management component 30, releasing heat and completing the cooling and heat dissipation of the battery cell 11.

[0093] The principle of the thermal management component 30 for heating the battery cell 11 is as follows: the heat exchange medium output by the heat exchange medium source enters the medium flow channel 314 through the liquid inlet 318 of the thermal management component 30. The heat exchange medium transfers heat to the battery cell 11 to realize heating of the battery cell 11. After that, the heat exchange medium flows out through the liquid outlet 319 of the thermal management component 30, completing the heating of the battery cell 11.

[0094] The housing assembly 20 is used to accommodate the battery cells 11, and the housing assembly 20 can have various structures. In some embodiments, referring to Figure 2 and Figure 3 , the housing assembly 20 may include a first housing part 21 and a second housing part 22. The first housing part 21 and the second housing part 22 cover each other to define an accommodation space for accommodating the battery cells 11.

[0095] To improve the sealing performance after the connection between the first housing part 21 and the second housing part 22, a sealing member, such as sealant, sealing ring, etc., can also be provided between the first housing part 21 and the second housing part 22.

[0096] Assume that the first housing part 21 covers the top of the second housing part 22. The first housing part 21 can also be called the upper cover, and the second housing part 22 can also be called the lower cover.

[0097] Exemplarily, at least one heat exchange plate has a convex portion 313, and a medium flow channel 314 is formed in the convex portion 313.

[0098] Here, by having at least one heat exchange plate with a convex portion 313 and forming a medium flow channel 314 in the convex portion 313, that is to say, the convex portion 313 can be set into a required shape according to requirements, which is beneficial to improving the design flexibility of the medium flow channel 314.

[0099] In some embodiments, referring to Figure 8 , the medium flow channel 314 includes a bent section.

[0100] Here, the size and path of the medium flow channel 314 can be freely designed according to the heat distribution or space distribution of the battery cells 11. For example, by setting the medium flow channel 314 to include a bent section, it is beneficial to improve the heat exchange efficiency and the convenience of assembly.

[0101] Exemplarily, the heat exchange plate can be formed with the convex portion 313 by stamping.

[0102] Here, the specific material of the heat exchange plate is not limited herein.

[0103] 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.

[0104] The materials of different heat exchange plates can be the same or different.

[0105] 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.

[0106] Exemplarily, at least two heat exchange plates are connected by welding. 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.

[0107] Exemplarily, the heat exchange plates are connected by brazing.

[0108] Brazing can combine dissimilar metals (such as aluminum matrix composites) through a hot rolling composite process, enabling the material to have both high mechanical strength, corrosion resistance, and fatigue resistance characteristics, and is suitable for load-bearing and harsh environments. In addition, the brazed joint has good airtightness and liquid tightness, supports the dissimilar connection of various metals and alloys. Moreover, the size and path of the medium flow channel 314 can be freely designed, which is suitable for complex scenarios with irregular heat source distribution or limited space.

[0109] By setting the heat exchange member 31 to include at least two heat exchange plates, the at least two heat exchange plates are stacked to form at least one medium flow channel 314. In this way, it is beneficial to improve the design flexibility of the heat exchange member 31. The size and path of the medium flow channel 314 can be freely designed, which is suitable for complex scenarios with irregular heat source distribution or limited space, and is beneficial to further improve the heat exchange efficiency. In addition, by providing the at least one heat exchange plate with a convex portion 313 to form the medium flow channel 314 at the convex portion 313, it is further beneficial to improve the design flexibility.

[0110] Exemplarily, the heat exchange member 31 and the battery layer 10 can be adhesively bonded by applying glue. The setting of the partition member 40 can act as a barrier to the glue, thereby improving the situation of glue overflow.

[0111] Exemplarily, please refer to Figures 5 to 8 , the first surface 3111 of the heat exchange member 31 is configured to carry the battery layer 10. The partition member 40 is disposed on the first surface 3111, and the partition member 40 abuts between the battery layer 10 and the first surface 3111.

[0112] The partition member 40 abuts between the battery layer 10 and the first surface 3111. That is to say, the upper battery layer 10 is pressed on the partition member 40, rather than on the heat exchange member 31. The partition member 40 can play a supporting role. In this way, to a certain extent, the situation where the battery layer 10 crushes the medium flow channel 314 can be avoided.

[0113] Exemplarily, the partition member 40 can be higher than the convex portion 313, and a medium flow channel 314 is formed in the convex portion 313, so that the upper battery layer 10 is pressed on the partition member 40 instead of on the convex portion 313.

[0114] By configuring the first surface 3111 of the heat exchange member 31 to carry the battery layer 10 and abutting the partition member 40 between the battery layer 10 and the first surface 3111, that is, by pressing the upper battery layer 10 on the partition member 40, the partition member 40 can play a supporting role, thereby improving the situation where the upper battery layer 10 is pressed on the medium flow channel 314, and further reducing the possibility of the upper battery layer 10 crushing the medium flow channel 314, which is beneficial to improving the reliability of the battery device 100. In addition, the setting of the partition member 40 can also block the adhesive, thereby improving the situation where the adhesive overflows outside the battery layer 10.

[0115] Exemplarily, the heating member 32 can be a heating film. Further, the heating member 32 can be an electric heating film.

[0116] Exemplarily, the heating member 32 has a heating resistance inside. After the heating resistance is energized, heat is generated to heat the battery layer 10.

[0117] Please refer to Figures 4 to 6 , the heating member 32 is disposed between the battery layer 10 and the heat exchange member 31, that is, the heat exchange member 31 is in contact with the battery layer 10 through the heating member 32.

[0118] When the battery layer 10 needs to be heated, the heat generated by the heating member 32 can be directly transferred to the battery layer 10, or can be transferred to the battery layer 10 through the heat exchange member 31. The material of the heat exchange member 31 itself can better transfer the heat generated by the heating member 32 to the battery layer 10. In this way, the heating member 32 can heat two adjacent battery layers 10 at the same time, improving the heating efficiency.

[0119] When the battery layer 10 needs to be cooled, the cold generated by the heat exchange member 31 can be directly transferred to the battery layer 10, or can be transferred to the battery layer 10 through the heating member 32 (at this time, the heating member 32 does not generate heat) to achieve heat dissipation of the battery layer 10.

[0120] Exemplarily, the heating member 32 can be first attached to the surface of the heat exchange member 31, and then the heat exchange member 31 and the heating member 32 are further combined with the battery layer 10, for example, fixed by gluing. Of course, it can also be that the heating member 32 is first attached to the battery layer 10, and then the heat exchange member 31, the heating member 32 and the battery layer 10 are fixed by gluing.

[0121] The battery device 100 provided by the embodiment of the present application includes a box body assembly 20, a thermal management assembly 30, and a battery assembly. The battery layer 10 is arranged in the box body assembly 20, and the box body assembly 20 plays a protective role for the battery layer 10. On the one hand, by arranging multiple battery layers 10, it is beneficial to improve the power of the battery device 100. In addition, by stacking the battery layers 10 along the height direction of the battery device 100, it is also beneficial to make full use of the space in the box body assembly 20 and improve the energy density of the battery device 100. On the other hand, by arranging the heat exchange member 31 between the multiple battery layers 10, heat exchange can be simultaneously performed on the battery layers 10 on the 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 layer 10. That is to say, while improving the energy density of the battery device 100, the heat exchange efficiency can also be improved. In addition, by arranging a heating member 32 between the battery layer 10 and the heat exchange member 31, or by arranging a heating member 32 between the battery layer 10 and the box body assembly 20, when the battery layer 10 needs to be heated, the heat generated by the heating member 32 can be transferred to the battery layer 10, so that the battery layer 10 can be heated under low-temperature conditions without the need to additionally arrange a heating device to heat the heat exchange medium, thereby improving the cycle performance and service life of the battery device. In addition, the structure of heating the battery layer by the heating member is simple, which is beneficial to simplifying the structure and reducing the cost. In addition, when the heating member 32 is arranged between adjacent battery layers 10, the heating member 32 can heat the adjacent battery layers 10 simultaneously, improving the heating efficiency.

[0122] Here, there are various situations where at least one heat exchange plate has a convex portion 313.

[0123] In some embodiments, please refer to Figures 5 to 8 , the heat exchange member 31 includes at least two heat exchange plates. The heat exchange plates include a first heat exchange plate 311 and a second heat exchange plate 312. A partial area of the first heat exchange plate 311 protrudes to form a convex portion 313. The first heat exchange plate 311 and the second heat exchange plate 312 are stacked, and a medium flow channel 314 is defined between the convex portion 313 and the second heat exchange plate 312.

[0124] That is to say, only a partial area of the first heat exchange plate 311 needs to protrude to form a convex portion 313, and the second heat exchange plate 312 does not need to form a convex portion 313, which is beneficial to reducing the process of forming a convex portion 313 on the second heat exchange plate 312 and can reduce the positioning difficulty between the first heat exchange plate 311 and the second heat exchange plate 312, which is beneficial to improving production efficiency.

[0125] In other embodiments, partial areas of both the first heat exchange plate 311 and the second heat exchange plate 312 protrude to form convex portions 313.

[0126] Exemplarily, the first heat exchange plate 311 is disposed above the second heat exchange plate 312. Thus, the first heat exchange plate 311 has a first surface 3111.

[0127] In some embodiments, the first surface 3111 is the surface of the first heat exchange plate 311 on the side facing away from the second heat exchange plate 312.

[0128] Here, the protruding portions 313 of the first heat exchange plate 311 and the protruding portions 313 of the second heat exchange plate 312 may be disposed opposite to each other, so as to enclose a medium flow channel 314 between the protruding portions 313 of the first heat exchange plate 311 and the protruding portions 313 of the second heat exchange plate 312; alternatively, the protruding portions 313 of the first heat exchange plate 311 and the protruding portions 313 of the second heat exchange plate 312 may be staggered, so as to enclose a medium flow channel 314 between the protruding portions 313 of the first heat exchange plate 311 and the non-protruding portions of the second heat exchange plate 312, and a medium flow channel 314 is enclosed between the protruding portions 313 of the second heat exchange plate 312 and the non-protruding portions of the first heat exchange plate 311.

[0129] In some embodiments, please refer to Figures 5 to 6 , the multi-layer battery layer 10 includes an adjacent first battery layer 12 and a second battery layer 13, and the second battery layer 13 is located above the first battery layer 12. A first mating plane 3121 is formed on the side of the heat exchange member 31 facing the first battery layer 12, and a heating member 32 is disposed between the first mating plane 3121 and the first battery layer 12.

[0130] Exemplarily, a first mating plane 3121 is formed on the side of the second heat exchange plate 312 facing away from the first heat exchange plate 311, the first mating plane 3121 faces the first battery layer 12, and the first heat exchange plate 311 faces the second battery layer 13.

[0131] In addition to the first battery layer 12 and the second battery layer 13, the multi-layer battery layer 10 may further include other battery layers 10, such as a third battery layer 10, etc. The third battery layer 10 may be located below the first battery layer 12 or above the second battery layer 13.

[0132] A heat exchange member 31 is disposed between the first battery layer 12 and the second battery layer 13.

[0133] Here, the first heat exchange plate 311 and the second heat exchange plate 312 are stacked, the first heat exchange plate 311 is located above the second heat exchange plate 312, and a first mating plane 3121 is formed on the side of the second heat exchange plate 312 facing away from the first heat exchange plate 311. That is to say, the first mating plane 3121 is used to cooperate with the first battery layer 12, and the protruding portion 313 is disposed on the side of the heat exchange member 31 facing the second battery layer 13.

[0134] In this embodiment, a first mating plane 3121 is formed on the side of the heat exchange member 31 facing the first battery layer 12, and a heating member 32 is disposed between the first mating plane 3121 and the first battery layer 12. In this way, the heating member 32 can be better mated with the first battery layer 12 and the heat exchange member 31.

[0135] Exemplarily, the heating member 32 is attached to the first mating plane 3121.

[0136] That is to say, the heating member 32 can be first attached to the first mating plane 3121 to form a pre-assembled member of the heating member 32 and the heat exchange member 31, and then the pre-assembled member is mated with the first battery layer 12, for example, fixed by gluing.

[0137] Of course, it can also be that the heating member 32 is first attached to the first battery layer 12 to form a pre-assembled member of the heating member 32 and the first battery layer 12, and then the pre-assembled member is glued and fixed to the heat exchange member 31.

[0138] Here, by attaching the heating member 32 to the first mating plane 3121, the setting of the heating member 32 is facilitated, so that the heating member 32 can be better attached to the heat exchange member 31.

[0139] In some embodiments, please refer to Figures 7 to 8 , the heat exchange member 31 includes a first flow channel group 316 and a second flow channel group 317. The first flow channel group 316 includes a liquid inlet 318 and at least one medium flow channel 314. The second flow channel group 317 includes a liquid outlet 319 and at least one medium flow channel 314. One end of the medium flow channel 314 of the first flow channel group 316 is communicated with the liquid inlet 318, one end of the medium flow channel 314 of the second flow channel group 317 is communicated with the liquid outlet 319, and the end of the medium flow channel 314 of the first flow channel group 316 far from the liquid inlet 318 is communicated with the end of the medium flow channel 314 of the second flow channel group 317 far from the liquid outlet 319.

[0140] That is to say, the heat exchange medium flows into the medium flow channel 314 of the first flow channel group 316 from the liquid inlet 318, then flows into the medium flow channel 314 of the second flow channel group 317, and flows out from the liquid outlet 319.

[0141] In an embodiment where the first flow channel group 316 includes multiple medium flow channels 314, the same ends of the multiple medium flow channels 314 of the first flow channel group 316 are communicated with the liquid inlet 318.

[0142] In an embodiment where the second flow channel group 317 includes multiple medium flow channels 314, the same ends of the multiple medium flow channels 314 of the second flow channel group 317 are communicated with the liquid outlet 319.

[0143] In this embodiment, by setting the heat exchanger 31 to include a first flow channel group 316 and a second flow channel group 317, such that the medium flow channel 314 of the first flow channel group 316 communicates with the liquid inlet 318, and the medium flow channel 314 of the second flow channel group 317 communicates with the liquid outlet 319, the size and path of the medium flow channel 314 can be freely designed according to the heat distribution or spatial distribution of the battery cells 11, which is beneficial to further improving the heat exchange efficiency.

[0144] In some embodiments, referring to Figures 5 to 8 , each battery layer 10 includes a plurality of battery cells 11 arranged in a first direction, the medium flow channel 314 extends in the first direction, the first flow channel group 316 and the second flow channel group 317 are arranged in a second direction, and the first direction intersects the second direction.

[0145] Here, the liquid inlet 318 and the liquid outlet 319 can be on the same side of the heat exchanger 31 along the first direction, or on different sides of the heat exchanger 31 along the first direction.

[0146] In this embodiment, by setting the arrangement direction of the battery cells 11 to be the same as the extension direction of the medium flow channel 314, it is beneficial to improve the uniformity of heat exchange, and thus beneficial to improving the temperature uniformity of the battery cells 11.

[0147] In some embodiments, referring to Figures 6 to 8 , 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 less 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.

[0148] 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.

[0149] Here, h1, h2, and h3 can be measured by measuring tools such as vernier calipers at normal temperature before the battery device 100 is used.

[0150] It should be noted that h1, h2, and h3 do not include the dimensions of the pole post 111 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.

[0151] 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.

[0152] Exemplarily, the battery cell 11 in this embodiment may be a blade battery, which is long and thin in shape.

[0153] It may 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 may 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.

[0154] 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.

[0155] In some embodiments, please refer to Figures 7 to 8 , the battery cell 11 further includes a terminal 111 and / or a pressure relief structure. The terminal 111 and / or the pressure relief structure are arranged on at least one side 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.

[0156] It can be understood that the battery cells 11 of each battery layer 10 are arranged in the first direction, and the battery layers 10 are stacked in the height direction of the battery device 100. Thus, it is not convenient to arrange the terminal 111 and / or the pressure relief structure in the first direction and the height direction of the battery device 100. For example, by arranging the terminal 111 and / or the pressure relief structure in the first direction or the height direction of the battery device 100, it is necessary to avoid the terminal 111 and / or the pressure relief structure, which is not conducive to improving the structural compactness.

[0157] In this way, when the battery cells 11 are stacked in the first direction, the terminal 111 is arranged on the side of the battery cell 11, which is convenient for electrically connecting a plurality of battery cells 11 to achieve series and / or parallel connection. It should be noted that the terminal 111 includes a positive terminal 111 and a negative terminal 111. During the charging and discharging process of the battery, the positive terminal 111 and the negative terminal 111 are electrically connected to form a current loop, or the positive terminals 111 and / or negative terminals 111 of a plurality of battery cells 11 can also be electrically connected to achieve series and / or parallel connection.

[0158] In this embodiment, by disposing the pole column 111 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 damage to the pole column 111 and / or the pressure relief structure during the stacking process of the battery cell 11 and / or the battery layer 10.

[0159] In some embodiments, referring to Figures 5 to 8 , along the second direction, the first flow channel group 316 is closer to the pole column 111 and / or the pressure relief structure than the second flow channel group 317.

[0160] Here, the medium flow channel 314 of the first flow channel group 316 is communicated with the liquid inlet 318, and the medium flow channel 314 of the second flow channel group 317 is communicated with the liquid outlet 319. During the heat exchange process, the heat exchange medium first flows through the medium flow channel 314 of the first flow channel group 316, and then flows through the medium flow channel 314 of the second flow channel group 317. Thus, the temperature of the medium flow channel 314 in the first flow channel group 316 is relatively lower than that of the medium flow channel 314 in the second flow channel group 317. And the temperature of one end of the battery cell 11 close to the pole column 111 and / or the pressure relief structure is relatively higher than that of the end far from the pole column 111 and / or the pressure relief structure. Thus, by setting the first flow channel group 316 to be closer to the pole column 111 and / or the pressure relief structure than the second flow channel group 317, it is beneficial to improve the heat exchange efficiency and the temperature uniformity of the battery cell 11.

[0161] In some embodiments, referring to Figures 7 to 8 , each battery layer 10 includes a plurality of battery cells 11 arranged along the first direction, and a partition member 40 is disposed on at least one side of the protrusion 313 along the second direction, and the first direction, the second direction and the height direction of the battery device 100 intersect.

[0162] It may be that the partition member 40 is disposed on one side of the protrusion 313 along the second direction, or the partition member 40 is disposed on both sides of the protrusion 313 along the second direction.

[0163] Of course, the partition member 40 may also be disposed at the middle position of the protrusion 313, for example, the partition member 40 is disposed at the gap between adjacent medium flow channels 314.

[0164] Exemplarily, the partition member 40 extends along the first direction.

[0165] In this embodiment, the partition member 40 is disposed on at least one side of the protrusion 313 along the second direction, which is beneficial to block the adhesive, thereby further improving the situation of adhesive overflow.

[0166] In some embodiments, referring to Figures 7 to 8, partition members 40 are provided on both sides of the convex portion 313 along the second direction, and the two partition members 40 are respectively supported at both ends of the battery cell 11 along the second direction.

[0167] That is to say, the two partition members 40 are respectively located outside the convex portion 313 along the second direction, which is further beneficial to improving the situation of adhesive overflow. In addition, by respectively supporting the two partition members 40 at both ends of the battery cell 11 along the second direction, it is beneficial to improve the supporting effect of the partition members 40 on the battery cell 11, and can further reduce the possibility that the upper battery layer 10 crushes the dielectric flow channel 314, thereby further improving the reliability of the battery device 100.

[0168] In some embodiments, please refer to Figures 5 to 8 , each battery layer 10 includes a plurality of battery cells 11 arranged along the first direction, the battery assembly further includes at least one end plate 50, the end plate 50 is provided at at least one end of the battery layer 10 along the first direction, and the heat exchange member 31 is connected to the end plate 50 at at least one end along the first direction, and the first direction intersects with the height direction of the battery device 100.

[0169] The number of the end plates 50 can be one or more.

[0170] The end plate 50 can be provided at one end of the battery layer 10 along the first direction, and the other end can be abutted against the side wall of the box body assembly 20. The battery layer 10 can also be provided with end plates 50 at both ends along the first direction.

[0171] In the embodiment where the end plates 50 are provided at both ends of the battery layer 10 along the first direction, both ends of the heat exchange member 31 along the first direction are connected to the end plates 50.

[0172] Here, the end plate 50 is used to restrain the battery layer 10 in the first direction and at least bear the expansion force of the battery cell 11. The expansion force here specifically refers to the force exerted on the box body assembly 20 due to the expansion deformation of the battery cell 11. As an example, the end plate 50 mainly bears the expansion force along the first direction.

[0173] In some related technologies, the end plate 50 is also called an expansion beam.

[0174] 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 the end plate 50 can be made of any suitable material, such as metal materials, polymer materials, composite materials, etc.

[0175] The specific connection manner between the heat exchange member 31 and the end plate 50 is not limited, and can 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 transmitted to the end plate 50.

[0176] Exemplarily, please refer toFigure 3 The housing assembly 20 includes a frame and a bottom wall. The frame is disposed along the edge of the bottom wall. The frame and the bottom wall jointly enclose a receiving space. 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.

[0177] Exemplarily, both ends of the end plate 50 in the second direction are connected to the frame.

[0178] Exemplarily, it can be that the end plate 50 is first connected to the frame, and then the battery layer 10 is assembled. It can also be that the end plate 50 is first assembled with the battery layer 10, and then the pre-assembled part of the end plate 50 and the battery layer 10 is assembled to the frame.

[0179] In this embodiment, by having end plates 50 at at least one end of the battery layer 10 in the first direction and connecting the heat exchange member 31 to the end plates 50 at at least one end in the first direction, in this way, it is beneficial for the heat exchange member 31 to transfer the force received to the frame through the end plates 50, which is beneficial to improving the support strength for the battery layer 10, and is also beneficial to reducing the possibility of the battery layer 10 being crushed due to excessive stacking of the lower battery layer 10. Furthermore, while increasing the capacitance of the battery device 100, the reliability of the battery device 100 is improved.

[0180] In some embodiments, please refer to Figures 3 to 5 The multi-layer battery layer 10 includes a first battery layer 12 and a second battery layer 13. The second battery layer 13 is located above the first battery layer 12. The end plate 50 includes a first end plate 51 and a second end plate 52 that are oppositely disposed in the first direction. The first battery layer 12 is disposed between the first end plate 51 and the second end plate 52. Both ends of the heat exchange member 31 in the first direction are respectively connected to the first end plate 51 and the second end plate 52.

[0181] That is to say, the heat exchange member 31 disposed between the first battery layer 12 and the second battery layer 13 is connected to the first end plate 51 and the second end plate 52 corresponding to the first battery layer 12. In other words, the heat exchange member 31 is connected to the end plate 50 corresponding to the lower battery layer 10.

[0182] In some embodiments, please refer to Figures 3 to 5 The end plate 50 includes a third end plate 53 and a fourth end plate 54 that are oppositely disposed in the first direction. The second battery layer 13 is disposed between the third end plate 53 and the fourth end plate 54. Both ends of the heat exchange member 31 in the first direction are respectively connected to the third end plate 53 and the fourth end plate 54.

[0183] That is to say, the heat exchanger 31 disposed between the first battery layer 12 and the second battery layer 13 is connected to the third end plate 53 and the fourth end plate 54 corresponding to the second battery layer 13. In other words, the heat exchanger 31 is connected to the end plate 50 corresponding to the upper battery layer 10.

[0184] Here, the heat exchanger 31, the third end plate 53, the fourth end plate 54, and the second battery layer 13 form an integral body, and then are stacked with other battery layers 10, which is beneficial to improving the overall structural strength of the battery device 100.

[0185] In some other embodiments, the heat exchanger 31 can be connected to the first end plate 51, the second end plate 52, the third end plate 53, and the fourth end plate 54 simultaneously.

[0186] Of course, in some other embodiments, the battery layer 10 is used to carry the upper heat exchanger 31.

[0187] That is to say, the weight of the heat exchanger 31 is supported on the battery layer 10, that is, the battery layer 10 is used to carry the upper heat exchanger 31.

[0188] In some embodiments, the battery assembly includes a mounting bracket, the mounting bracket is connected to the box body assembly 20, and the heat exchanger 31 is connected to the mounting bracket.

[0189] Exemplarily, the mounting bracket is connected to the bottom wall of the box body assembly 20.

[0190] Exemplarily, the mounting bracket is connected to the frame of the box body assembly 20.

[0191] In some embodiments, please refer to Figure 7 , at least one end of the heat exchanger 31 in the first direction forms a first flanging portion 315, and the first flanging portion 315 is connected to the end plate 50.

[0192] The heat exchanger 31 can form a first flanging portion 315 at one end in the first direction, or can form first flanging portions 315 at both ends in the first direction. That is to say, the heat exchanger 31 forms the first flanging portion 315 by folding towards the end plate 50, and is connected to the end plate 50 through the first flanging portion 315. This connection structure is simple and reliable, and is convenient for forming.

[0193] In some embodiments, please refer to Figures 3 to 4 , a heating element 32 is provided at the top of the uppermost battery layer 10.

[0194] In this way, the top of the uppermost battery layer 10 can be heated, and further the reliability of the battery device 100 is improved.

[0195] In some embodiments, please refer to Figures 3 to 4, the thermal management component 30 further includes an upper cover 33, the upper cover 33 is disposed on the top of the uppermost battery layer 10, and a heating element 32 is disposed between the upper cover 33 and the uppermost battery layer 10.

[0196] That is to say, the heating element 32 can be first attached to the surface of the upper cover 33 to form a pre-assembled component of the heating element 32 and the upper cover 33, and then the pre-assembled component is mated with the uppermost battery layer 10, for example, fixed by gluing.

[0197] Of course, it can also be that the heating element 32 is first attached to the uppermost battery layer 10 to form a pre-assembled component of the heating element 32 and the uppermost battery layer 10, and then the pre-assembled component is fixed to the upper cover 33 by gluing.

[0198] In this embodiment, by providing the upper cover 33 and arranging the heating element 32 between the upper cover 33 and the uppermost battery layer 10, it is convenient to arrange the heating element 32, so that the heating element 32 can better fit with the heat exchange element 31, and can play a protective role for the heating element 32, thereby improving the reliability of the thermal management component 30.

[0199] In some embodiments, please refer to Figures 3 to 4 , at least one end of the upper cover 33 in the first direction forms a second flanging portion 331, and the second flanging portion 331 is connected to the end plate 50.

[0200] The upper cover 33 can form a second flanging portion 331 at one end in the first direction, or can form second flanging portions 331 at both ends in the first direction.

[0201] That is to say, the upper cover 33 forms the second flanging portion 331 by folding towards the end plate 50, and is connected to the end plate 50 through the second flanging portion 331. This connection structure is simple and reliable, and is convenient for molding.

[0202] The specific connection manner between the second flanging portion 331 and the end plate 50 is not limited, and can be a fastening connection, a clamping connection or a welding connection. This connection structure is simple and reliable.

[0203] In the description of the present disclosure, the description referring 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 different embodiments or examples described in the present disclosure and the features of different embodiments or examples.

[0204] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are all included within the protection scope of the present application.

Claims

1. A battery device, characterized in that, Comprising: A box body assembly; A battery assembly, the battery assembly including multiple battery layers stacked along the height direction of the battery device, and the multiple battery layers are arranged inside the box body assembly; A thermal management assembly, the thermal management assembly including a heat exchange member and a heating member, the interior of the heat exchange member having at least one medium flow channel for conducting a heat exchange medium, and the heat exchange medium being used for heat exchange with the battery layers; Wherein, the heat exchange member is arranged between the multiple battery layers and is used for carrying at least part of the battery layers; the heating member is arranged between the battery layer and the heat exchange member, or the heating member is arranged between the battery layer and the box body assembly; The multiple battery layers include a first battery layer and a second battery layer arranged adjacent to each other, and the second battery layer is located above the first battery layer; A first mating plane is formed on one side of the heat exchange member facing the first battery layer, and the heating member is arranged between the first mating plane and the first battery layer; The heat exchange member includes at least two heat exchange plates, the heat exchange plates including a first heat exchange plate and a second heat exchange plate, a protruding portion is formed by partial regions of the first heat exchange plate, the first heat exchange plate and the second heat exchange plate are stacked, and the medium flow channel is defined between the protruding portion and the second heat exchange plate, and the first mating plane is formed on the side of the second heat exchange plate facing away from the first heat exchange plate; The first heat exchange plate has a first surface on the side facing away from the second heat exchange plate, and the first surface is configured to carry the second battery layer; The battery device further includes a partition member, the partition member is arranged on at least one side within the first surface, and the partition member abuts between the second battery layer and the first surface.

2. The battery device according to claim 1, characterized in that Each battery layer includes multiple battery cells arranged along a first direction, the battery assembly further includes at least one end plate, the end plate is arranged at at least one end of the battery layer along the first direction, and the heat exchange member is connected to the end plate at at least one end along the first direction, and the first direction intersects with the height direction of the battery device.

3. The battery device according to claim 2, characterized in that, At least one end of the heat exchange member along the first direction forms a first flanging portion, and the first flanging portion is connected to the end plate.

4. The battery device according to claim 2, wherein, The heat exchange member is fixedly connected to, snap-connected to, or welded to the end plate.

5. The battery device according to claim 1, characterized in that, The heating member is arranged at the top of the topmost battery layer.

6. The battery device according to claim 5, characterized in that, The thermal management assembly further includes an upper cover, the upper cover is arranged at the top of the topmost battery layer, and the heating member is arranged between the upper cover and the topmost battery layer.

7. The battery device according to claim 6, characterized in that, Each battery layer includes multiple battery cells arranged along a first direction, the battery assembly further includes at least one end plate, and the end plate is arranged at at least one end of the battery layer along the first direction; At least one end of the upper cover along the first direction forms a second flanging portion, and the second flanging portion is connected to the end plate.

8. The battery device according to claim 7, characterized in that, The second flanging portion is fixedly connected to, snap-connected to, or welded to the end plate.

9. The battery device according to claim 1, wherein Each of the battery layers includes a plurality of battery cells arranged in a first direction, a dimension of each battery cell in a height direction of the battery device and a dimension of each battery cell in the first direction are smaller than a dimension of each battery cell in a second direction, the first direction, the second direction and the height direction of the battery device intersect, and the dimension of each battery cell in the second direction is in a range of 300 mm to 1200 mm.

10. The battery device according to claim 1, wherein, Each of the battery layers includes a plurality of battery cells arranged in a first direction, and each battery cell further includes a terminal post and / or a pressure relief structure, and the terminal post and / or the pressure relief structure are arranged on at least one side of each battery cell in the second direction, and the first direction, the second direction and the height direction of the battery device intersect.

11. An electrical device, characterized in that, A battery device according to any one of claims 1 to 10 is included.

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