Battery device and power-consuming device

Abstract

Battery device comprising the following: a box assembly; a battery assembly, wherein the battery assembly comprises several battery layers stacked in a vertical direction of the battery device, with several battery layers being provided within the box assembly; a heat management assembly, wherein the heat management assembly comprises a heat exchange element and a heating element, wherein the heat exchange element has at least one medium flow channel inside, wherein at least one medium flow channel is used to guide a heat exchange medium, and wherein the heat exchange medium is used for heat exchange with the battery layers; wherein the heat exchange element is provided between several battery layers, wherein the heat exchange element is used to support at least part of the battery layers; wherein the heating element is provided between the battery layers and the heat exchange element, or wherein the heating element is provided between the battery layers and the box assembly.

Description

TECHNICAL AREA

[0001] The present disclosure relates to the technical field of batteries, in particular a battery device and a power-consuming device. STATE OF THE ART

[0002] In a new energy vehicle equipped with a battery system, the battery system can be used for full or partial energy supply. The prior art uses a single-layer battery arrangement, but this single-layer battery system can have a lower energy density and limited power output. Furthermore, a colder environment can lead to a lower battery system temperature, which can affect, for example, the cycle performance and the battery system's lifespan. CONTENT OF THE PRESENT INVENTION

[0003] In view of this, the purpose of the embodiments of the present disclosure is to provide a battery device and a power-consuming device that can increase the energy density of the battery device and simultaneously improve the cycle performance of the battery device.

[0004] For this purpose, a first aspect of the embodiments of the present disclosure provides a battery device comprising the following: a box assembly; a battery assembly, wherein the battery assembly comprises several battery layers stacked in a vertical direction of the battery device, with several battery layers being provided within the box assembly; a heat management assembly, wherein the heat management assembly comprises a heat exchange element and a heating element, wherein the heat exchange element has at least one medium flow channel inside, wherein at least one medium flow channel is used to guide a heat exchange medium, and wherein the heat exchange medium is used for heat exchange with the battery layers; wherein the heat exchange element is provided between several battery layers, wherein the heat exchange element is used to support at least part of the battery layers; wherein the heating element is provided between the battery layers and the heat exchange element, or wherein the heating element is provided between the battery layers and the box assembly.

[0005] The embodiments of the present disclosure provide a battery device comprising a box assembly, a thermal management assembly, and a battery assembly, wherein the battery layer is provided within the box assembly, which in turn provides protection for the battery layer. On the one hand, multiple battery layers are provided, which contributes to increasing the performance of the battery device. Furthermore, the battery layers are stacked along the vertical direction of the battery device, which also contributes to fully utilizing the space within the box assembly and improving the energy density of the battery device.On the other hand, a heat exchanger is provided between several battery layers, capable of simultaneously exchanging heat for battery layers located on opposite sides of the heat exchanger. This contributes to improving the heat exchanger's efficiency with respect to the battery layers, meaning the energy density of the battery device can be improved along with the heat exchanger's efficiency. Additionally, a heating element is provided between the battery layer and the heat exchanger, or between the battery layer and the box assembly.When the battery layers need to be heated, the heat generated by the heating element can be transferred to them. This allows the battery layers to be heated under low-temperature operating conditions, improving the cycle performance and lifespan of the battery device. Furthermore, the heating element's design for heating the battery layers is simple, eliminating the need for a separate heating device to warm the heat exchanger, thus simplifying the structure and reducing costs. Additionally, when positioned between adjacent battery layers, the heating element can heat them simultaneously, improving heating efficiency.

[0006] In some embodiments, the multiple battery layers comprise a first battery layer and a second battery layer arranged side by side, with the second battery layer being located above the first battery layer; wherein a first adaptation level is formed on the side of the heat exchange element facing the first battery layer, wherein the heating element is provided between the first adaptation level and the first battery layer.

[0007] In this embodiment, a first adaptation plane is formed on the side of the heat exchange element facing the first battery layer, with the heating element being provided between the first adaptation plane and the first battery layer. This allows the heating element to interact more effectively with both the first battery layer and the heat exchange element.

[0008] In some embodiments, the heating element is attached to the first adjustment level.

[0009] In this case, the heating element is attached to the first adjustment level to facilitate the arrangement of the heating element so that the heating element can be better attached to the heat exchange element.

[0010] In some embodiments, the heat exchange element comprises at least two heat exchange plates, wherein the heat exchange plates comprise a first heat exchange plate and a second heat exchange plate, wherein a portion of the first heat exchange plate protrudes to form a projection section, wherein the first heat exchange plate and the second heat exchange plate are stacked, the projection section and the second heat exchange plate forming the medium flow channel, and wherein the first adaptation plane is formed on a side of the second heat exchange plate facing away from the first heat exchange plate.

[0011] This increases the design flexibility of the heat exchange element, allowing for free customization of the dimensions and path of the medium flow channel. This is suitable for complex scenarios where the heat source distribution is irregular or space is limited, and it further improves heat exchange efficiency. The design flexibility is further enhanced by providing at least one heat exchange plate with a protruding section to form the medium flow channel at that section.

[0012] In some embodiments, each of the battery layers comprises several battery cells arranged along a first direction, the battery assembly further comprising at least one end plate, the battery layer being provided with the end plate at at least one end along the first direction, and at least one end of the heat exchange element being connected to the end plate along the first direction, the first direction intersecting with the vertical direction of the battery device.

[0013] In this embodiment, an end plate is provided at at least one end of the battery layer along the first direction, and the at least one end of the heat exchanger along the first direction is connected to the end plate. In this way, it is advantageous for the heat exchanger to transfer the force it absorbs via the end plate to a frame, which helps to increase the support strength for the battery layer and also reduces the likelihood of the lower battery layer being damaged by extrusion of the overlying battery layers due to stacking, thus improving the reliability of the battery device and simultaneously increasing its performance.

[0014] In some embodiments, the heat exchange element forms a first flap section at at least one end along the first direction, wherein the first flap section is connected to the end plate.

[0015] This means that the heat exchange element is folded in a direction facing the end plate to form a first flap section and is connected to the end plate by the first flap section, which is a simple and reliable connection structure and is easy to manufacture.

[0016] In some embodiments, the heat exchanger element is attached to the end plate, snapped into place, or welded on.

[0017] The connection structure is simple and reliable.

[0018] In some embodiments, the heating element is provided on the top side of the uppermost battery layer.

[0019] In this way, the reliability of the battery device is further improved in order to achieve heating of the top of the uppermost battery layer.

[0020] In some embodiments, the heat management assembly further comprises a top cover, wherein the top cover is provided on the top of the uppermost battery layer, and wherein the heating element is provided between the top cover and the uppermost battery layer.

[0021] In this embodiment, by arranging a top cover and a heating element between the top cover and the uppermost battery layer, it is advantageous to position the heating element in such a way that the heating element can be better attached to the heat exchanger element and the heating element can be protected, thereby improving the reliability of the thermal management assembly.

[0022] In some embodiments, each of the battery layers comprises several battery cells arranged along a first direction, the battery assembly further comprising at least one end plate, the battery layer being provided with the end plate at at least one end along the first direction;

[0023] In some embodiments, the upper cover forms a second flap section at at least one end along the first direction, the second flap section being connected to the end plate.

[0024] This means that the top cover is folded in a direction facing the end plate to form a second flap section and is connected to the end plate by the second flap section, which is a simple and reliable connection structure and is easy to manufacture.

[0025] In some embodiments, the second flap section is attached to the end plate, snapped into place or welded on.

[0026] The connection structure is simple and reliable.

[0027] In some embodiments, the dimension of the battery cell along the vertical direction of the battery device and the dimension of the battery cell along the first direction is smaller than the dimension of the battery cell along the second direction, wherein the first direction, the second direction and the vertical direction of the battery device intersect, and wherein the dimension of the battery cell along the second direction lies in a range of 300 mm to 1200 mm.

[0028] In this embodiment, by defining the dimensions of the battery cell along the second direction in the range of 300 mm to 1200 mm, the performance and assembly efficiency of the battery device can be taken into account.

[0029] In some embodiments, each of the battery layers comprises several battery cells arranged along a first direction, wherein the battery cells further comprise an electrode column and / or a pressure relief structure, wherein the electrode column and / or the pressure relief structure is provided on at least one side of the battery cells along a second direction, wherein the first direction, the second direction and the vertical direction of the battery device intersect.

[0030] In this embodiment, the arrangement of the electrode column and / or the pressure relief structure on at least one side of the battery cell along the second direction is advantageous, on the one hand, to improve the structural compactness of the battery device, and on the other hand, it is also advantageous to reduce the case of damage to the electrode column and / or the pressure relief structure during the process of stacking the battery cells and / or battery layers.

[0031] A second aspect of the embodiments of the present disclosure provides a power-consuming device comprising the above battery device.

[0032] The embodiments of the present disclosure provide a battery device for the power-consuming device, comprising a box assembly, a heat management assembly, and a battery assembly, wherein the battery layer is provided within the box assembly, which in turn provides protection for the battery layer. On the one hand, multiple battery layers are provided, which contributes to increasing the performance of the battery device. Furthermore, the battery layers are stacked along the vertical direction of the battery device, which also contributes to fully utilizing the space within the box assembly and improving the energy density of the battery device.On the other hand, a heat exchanger is provided between several battery layers, capable of simultaneously exchanging heat for battery layers located on opposite sides of the heat exchanger. This contributes to improving the heat exchanger's efficiency with respect to the battery layers, meaning the energy density of the battery device can be improved along with the heat exchanger's efficiency. Additionally, a heating element is provided between the battery layer and the heat exchanger, or between the battery layer and the box assembly.When the battery layers need to be heated, the heat generated by the heating element can be transferred to them. This allows the battery layers to be heated under low-temperature operating conditions, improving the cycle performance and lifespan of the battery device. Furthermore, the heating element's design for heating the battery layers is simple, eliminating the need for a separate heating device to warm the heat exchanger, thus simplifying the structure and reducing costs. Additionally, when positioned between adjacent battery layers, the heating element can heat them simultaneously, improving heating efficiency. BRIEF DESCRIPTION OF THE DRAWING Fig. Figure 1 shows a schematic representation of the structure of a vehicle according to an embodiment of the present disclosure; Fig. Figure 2 shows a schematic representation of the structure of a battery device according to an embodiment of the present disclosure; Fig. Figure 3 shows a three-dimensional schematic decomposition representation of the battery device according to an embodiment of the present disclosure; Fig. Figure 4 shows a partially three-dimensional schematic decomposition representation of the battery device according to an embodiment of the present disclosure; Fig. Figure 5 shows a schematic representation of a connection structure between a battery assembly and a heat exchanger element according to an embodiment of the present disclosure; Fig. Figure 6 shows an enlarged representation of A in Fig. 5; Fig. Figure 7 shows a partially three-dimensional schematic decomposition representation of the battery device according to an embodiment of the present disclosure; Fig. Figure 8 shows a schematic representation of a connection structure between a blocking element and the heat exchange element according to an embodiment of the present disclosure. Reference symbol list:

[0033] 10. Battery layer; 11. Battery cell; 111. Electrode stack; 12. First battery layer; 13. Second battery layer; 20. Box assembly; 21. First box section; 22. Second box section; 30. Heat management assembly; 31. Heat exchanger element; 311. First heat exchanger plate; 3111. First surface; 312. Second heat exchanger plate; 3121. First matching plane; 313. Projection section; 314. Medium flow channel; 315. First flap section; 316. First flow channel group; 317. Second flow channel group; 318. Inlet port; 319. Outlet port; 32. Heating element; 33. Top cover; 331. Further flap section; 40. Locking element; 50. End plate; 51. First end plate; 52. Second end plate; 53. Third end plate; 54. Fourth end plate; 100. Battery device; 200. Control unit; 300. Motor; 1000. Vehicle. DETAILED DESCRIPTION

[0034] Unless expressly stated otherwise, all embodiments and optional embodiments of the present disclosure may be combined to form new technical solutions.

[0035] Unless expressly stated otherwise, all technical features of the present disclosure, as well as optional technical features, may be combined to form a new technical solution.

[0036] With the development of clean energy, more and more devices use electrical energy as a power source, and therefore, high-performance batteries capable of storing more electrical energy and being charged and discharged many times, such as lithium-ion batteries, have been rapidly developed. High-performance batteries are not only used in energy storage systems like hydroelectric, thermal, wind, and solar power plants, but also find widespread application in electric vehicles such as e-bikes, e-motorcycles, and e-cars, as well as in aerospace and many other fields.

[0037] In the embodiments of the present disclosure, the battery cell can be a secondary battery, i.e., a battery cell that can be recharged after the battery cell has been discharged, so that the active material can be activated and used again.

[0038] The battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present disclosure are not limited thereto.

[0039] A battery cell generally comprises an electrode assembly. The electrode assembly includes a cathode, an anode, and a separator, with the separator located between the anode and the cathode. During charging and discharging of the battery cell, active ions (e.g., lithium ions) are embedded and unembedded between the cathode and the anode. The separator, located between the cathode and the anode, serves to prevent a short circuit between the cathode and the anode while allowing the passage of active ions.

[0040] The electrode assembly can have a wound structure, a stacked structure, or a mixed structure that combines both wound and stacked structures.

[0041] In some embodiments, the electrode assembly has a wound structure. The cathode foil and the anode foil are wound within this structure.

[0042] In some embodiments, the electrode assembly has a stacked structure.

[0043] For example, multiple cathode foils and multiple anode foils can be provided separately, and multiple cathode foils and multiple anode foils can be provided in alternating layers.

[0044] For example, several cathode foils can be provided, the anode foils are folded to form several folded segments arranged in a cascade, and a cathode foil is clamped between adjacent folded segments.

[0045] For example, both the cathode foils and the anode foils are folded to form several folded segments arranged in a cascade.

[0046] The separators can, for example, be arranged in multiples between adjacent cathode foils and anode foils.

[0047] For example, the separators can be arranged continuously between adjacent cathode foils and anode foils by folding or winding.

[0048] In some embodiments, the electrode assembly can have a cylindrical, flat or polygonal shape, etc.

[0049] In some embodiments, the electrode assembly is provided with electrode tabs, and the tabs can conduct the current away from the electrode assembly. The electrode tab comprises a cathode tab and an anode tab.

[0050] In some embodiments, the battery cell may include an outer casing. The casing may be, among other things, a steel casing, an aluminum casing, a plastic casing (e.g., polypropylene), a composite metal casing (e.g., a copper-aluminum composite casing), or an aluminum-plastic film. In some embodiments, the casing may be either a sealed or an unsealed structure. If the casing is unsealed, for example, it serves to protect the electrode assembly. A sealing pouch is also arranged between the casing and the electrode assembly, enclosing both the electrode assembly and the electrolyte solution. In particular, the sealing pouch may be a pouch-like insulating element or an aluminum-plastic film. If the casing is sealed, it encloses components such as the electrode assembly and the electrolyte solution.

[0051] The battery cell can be, for example, a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes, and the prismatic battery cell includes a battery cell with a square casing, a battery cell in the shape of a razor blade, a multi-prismatic battery, a multi-prismatic battery, for example a hexapod battery, etc., with no particular restrictions in the present disclosure.

[0052] In some embodiments, the housing comprises an end cap and a housing body, wherein the housing body is provided with an opening and the end cap covers the opening. The housing body may be provided with one or more openings. The end cap may also be provided in one or more openings.

[0053] In some embodiments, the housing is provided with at least one electrode clamp, the electrode clamp being electrically connected to the electrode tab. The electrode clamp can be connected to the electrode tab directly or indirectly via a collector component. The electrode clamp can be located on an end cap or on the housing body.

[0054] In some embodiments, energy storage devices include energy storage containers, energy storage cabinets, and the like.

[0055] In a new energy vehicle equipped with a battery system, the battery system can be used for full or partial energy supply. The prior art uses a single-layer battery arrangement, but this single-layer battery system can have a lower energy density and limited power output. Furthermore, a colder environment can lead to a lower battery system temperature, which can affect, for example, the cycle performance and the battery system's lifespan.

[0056] In view of this, and to improve the energy density of the battery device while simultaneously improving the cycle performance of the battery device, the embodiments of the present disclosure provide a battery device comprising a box assembly, a thermal management assembly and a battery assembly.wherein the battery assembly comprises several battery layers stacked in a vertical direction of the battery device, wherein several battery layers are provided within the box assembly; wherein the heat management assembly comprises a heat exchanger element and a heating element, wherein the heat exchanger element has at least one medium flow channel inside, wherein at least one medium flow channel is used to guide a heat exchange medium, and wherein the heat exchange medium is used for heat exchange with the battery layers; wherein the heat exchanger element is provided between several battery layers, and wherein the heat exchanger element is used to support at least a portion of the battery layers; wherein the heating element is provided between the battery layers and the heat exchanger element, or wherein the heating element is provided between the battery layers and the box assembly.

[0057] The embodiments of the present disclosure provide a battery device comprising a box assembly, a thermal management assembly, and a battery assembly, wherein the battery layer is provided within the box assembly, which in turn provides protection for the battery layer. On the one hand, multiple battery layers are provided, which contributes to increasing the performance of the battery device. Furthermore, the battery layers are stacked along the vertical direction of the battery device, which also contributes to fully utilizing the space within the box assembly and improving the energy density of the battery device.On the other hand, a heat exchanger is provided between several battery layers, capable of simultaneously exchanging heat for battery layers located on opposite sides of the heat exchanger. This contributes to improving the heat exchanger's efficiency with respect to the battery layers, meaning the energy density of the battery device can be improved along with the heat exchanger's efficiency. Additionally, a heating element is provided between the battery layer and the heat exchanger, or between the battery layer and the box assembly.When the battery layers need to be heated, the heat generated by the heating element can be transferred to them. This allows the battery layers to be heated under low-temperature operating conditions, improving the cycle performance and lifespan of the battery device. Furthermore, the heating element's design for heating the battery layers is simple, eliminating the need for a separate heating device to warm the heat exchanger, thus simplifying the structure and reducing costs. Additionally, when positioned between adjacent battery layers, the heating element can heat them simultaneously, improving heating efficiency.

[0058] The technical solutions described in the embodiments of this disclosure are all applicable to several power-consuming devices that use battery devices. The power-consuming device comprises a battery device according to one of the embodiments of this disclosure, wherein the battery device is used to provide electrical energy.

[0059] The power-consuming devices may include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, power tools, and the like. Vehicles may be fuel-powered, gas-powered, or new-energy vehicles, and new-energy vehicles may be all-electric, hybrid, or programmable, etc. Spacecraft include aircraft, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, etc. Power tools include metal cutting tools, grinding tools, assembly tools, and railway power tools, such as...Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, electric planers, and the like. The embodiments described in this disclosure do not impose any special restrictions on the above-mentioned power-consuming device.

[0060] It should be noted that the technical solutions described in the embodiments of this disclosure are not limited to the battery devices described above, but can also be applied to all consuming devices and energy storage devices that use battery devices; however, for the sake of simplicity of description, the following embodiments are all illustrated using the example of an electric vehicle.

[0061] With reference to Fig. 1. The vehicle 1000 can be equipped internally with a control unit 200, a motor 300, and a battery device 100, wherein the control unit 200 is used to control the battery device 100 to supply power to the motor 300. The battery device 100 can be located, for example, on the underside of the vehicle 1000 or on the front or rear of the vehicle. The battery device 100 can be used to supply power to the vehicle 1000; for example, the battery device 1000 can be used as an operating power source for the vehicle 1000 in the vehicle 1000's circuit system. It serves, for example, to meet the electrical needs of the vehicle 1000 for starting, navigation, and operation.In another embodiment of the present disclosure, the battery device 100 can be used not only as an operating energy source for the vehicle 1000, but also as a propulsion energy source for the vehicle 1000, instead of or partially instead of heating oil or natural gas to provide propulsion energy for the vehicle 1000.

[0062] With reference to Fig. Figures 2 to 8 describe embodiments of the present disclosure of a battery device 100, wherein the battery device 100 comprises a box assembly 20, a heat management assembly 30 and a battery assembly, wherein the battery assembly comprises several battery layers 10 stacked in a vertical direction of the battery device 100, wherein several battery layers 10 are provided within the box assembly 20, wherein the heat management assembly 30 comprises a heat exchange element 31 and a heating element 32, wherein the heat exchange element 31 has at least one medium flow channel 314 inside, wherein at least one medium flow channel 314 is used to guide a heat exchange medium, and wherein the heat exchange medium is used for heat exchange with the battery layers 10;wherein the heat exchange element 31 is provided between several battery layers 10, wherein the heat exchange element 31 is used to support at least a part of the battery layers 10; wherein the heating element 32 is provided between the battery layers 10 and the heat exchange element 31, or wherein the heating element 32 is provided between the battery layers 10 and the box assembly 20.

[0063] The multiple layers described in the present disclosure refer to a number of two or more layers.

[0064] To meet different performance requirements for use, the battery assembly of the battery device 100 comprises multiple battery layers 10 stacked in a vertical direction, each battery layer 10 comprising multiple battery cells 11, where the battery cells 11 are the smallest units that form a battery module or battery pack. Multiple battery cells 11 can be connected in series, in parallel, or in a mixed circuit, where mixed circuit means that multiple battery cells 11 are connected in series and in parallel.The multiple battery cells 11 can be connected directly in series, parallel, or in a mixed circuit, and then the entire assembly formed by the multiple battery cells 11 is housed in the box assembly 20. Of course, it is also possible for the battery device 100 to employ a method in which the multiple battery cells 11 are first connected in series, parallel, or in a mixed circuit to form a battery module, and the multiple battery modules are then connected in series, parallel, or in a mixed circuit to form a complete unit and housed in the box assembly 20. The battery device 100 can also include other structures. For example, the battery device 100 can also include a sink component to establish an electrical connection between multiple battery cells 11.Each battery cell 11 can be a secondary or primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 11 can be cylindrical, flat, rectangular, or otherwise shaped, etc.

[0065] The box assembly 20 can be a simple three-dimensional structure such as a separate rectangle, cylinder, or sphere, or a complex three-dimensional structure combined with a simple three-dimensional structure such as a rectangle, cylinder, or sphere. The material of the box assembly 20 can be an alloy material such as an aluminum alloy or an iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as fiberglass and epoxy resin.

[0066] The box assembly 20 serves to encapsulate the battery cell 11. The box assembly 20 can prevent liquids or other foreign bodies from interfering with the charging or discharging of the battery cells 11.

[0067] For example, the box assembly 20 is typically a rectangular structure, the longitudinal and transverse directions of the box assembly 20 are parallel to the horizontal plane, and the longitudinal direction of the box assembly 20 is parallel to the longest side of the rectangular structure of the box assembly 20. The vertical direction of the box assembly 20 is perpendicular to the ground.

[0068] It should be noted that the specific type of heat exchange medium is not limited here, as long as it can have a heat exchange effect on the battery cell 11; for example, it can be gaseous or liquid. The embodiments described in this disclosure use the heat exchange medium as a coolant as an example.

[0069] It should be noted that the specific number of medium flow channels 314 is not limited here. There can be one or more.

[0070] For example, with reference to Fig. 5 to 6, the heat exchange element 31 comprises 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, i.e. the number of heat exchange plates is several.

[0071] For example, the heat exchange plates have a plate-like structure which can exhibit some structural strength and support strength, thereby contributing to the improvement of the overall structural strength and stability of the heat management assembly 30.

[0072] For example, the heat exchanger plate can also be punched or welded to form a specific structure for support and the like, as required.

[0073] For example, with reference to Fig. 7 to 8, the heat management assembly 30 further comprises an inlet opening 318 and an outlet opening 319, and both the inlet opening 318 and the outlet opening 319 are connected to the medium flow channel 314.

[0074] In this case, the inlet opening 318 and the outlet opening 319 of the heat management assembly 30 are provided for connection to a line for a liquid storage, such as an air conditioning system or a water tank of an entire vehicle or a power-consuming device.

[0075] The principle of heat exchange between the heat management assembly 30 and the battery cell 11 is as follows: The heat exchange medium supplied by the heat exchange medium source (not shown in the figures) enters the medium flow channel 314 through the inlet opening 318 of the heat management assembly 30, and after the heat exchange medium has exchanged heat with the battery cell 11, the heat exchange medium flows out through the outlet opening 319 of the heat management assembly 30, thereby completing the heat exchange with the battery cell 11.

[0076] In this case, the heat exchange of the battery cell 11 through the heat management assembly 30 can be either heat dissipation from the battery cell 11 or heating of the battery cell 11.

[0077] The principle of heat dissipation through the heat management assembly 30 at the individual battery cell 11 is as follows: The heat exchange medium supplied by the heat exchange medium source enters the medium flow channel 314 through the inlet opening 318 of the heat management assembly 30, and after the heat exchange medium has absorbed the heat generated in the working process of the individual battery cell 11, the heat exchange medium flows out through the outlet opening 319 of the heat management assembly 30 and releases the heat, thereby completing the cooling and heat dissipation of the individual battery cell 11.

[0078] The principle of heating the individual battery cell 11 by the heat management assembly 30 is as follows: the heat exchange medium supplied by the heat exchange medium source enters the medium flow channel 314 through the inlet opening 318 of the heat management assembly 30, and the heat exchange medium transfers the heat to the individual battery cell 11 to achieve the heating of the individual battery cell 11, and then the heat exchange medium flows out through the outlet opening 319 of the heat management assembly 30, thereby completing the heating of the individual battery cell 11.

[0079] The box assembly 20 is used to house the battery cell 11, and the box assembly 20 can consist of various structures. In some embodiments, with reference to Fig. 2 and Fig. 3 The box assembly 20 can comprise a first box section 21 and a second box section 22, wherein the first box section 21 and the second box section 22 cover each other to jointly define a receiving space for receiving the battery cells 11.

[0080] To improve the sealing of the first box section 21 and the second box section 22 when they are connected, a sealing element, such as a sealant, a sealing ring and the like, can also be provided between the first box section 21 and the second box section 22.

[0081] Assuming that the first box section 21 covers the top of the second box section 22, the first box section 21 can also be referred to as the upper box lid, and the second box section 22 can also be referred to as the lower box body.

[0082] For example, the at least one heat exchange plate has a projection section 313, and the medium flow channel 314 is formed within the projection section 313.

[0083] By having at least one heat exchange plate with the projection section 313 and forming the medium flow channel 314 within the projection section 313, the projection section 313 can be provided in a desired shape as required, which facilitates the design flexibility of the medium flow channel 314.

[0084] In some embodiments, with reference to Fig. 8, the medium flow channel 314 comprises a curved segment.

[0085] In this case, the dimensions and path of the medium flow channel 314 can be freely designed according to the heat distribution or the spatial distribution of the battery cell 11. For example, by having curved segments in the medium flow channel 314, the heat exchange efficiency and ease of assembly can be improved.

[0086] For example, the heat exchange plate with the protruding section 313 can be formed by stamping.

[0087] The specific material of the heat exchanger plate is not limited in this respect.

[0088] In some embodiments, the heat exchanger plate is made of metal. The material of the heat exchanger plate can be, for example, an aluminum alloy, steel, or similar.

[0089] The materials of the different heat exchange plates can be the same or different.

[0090] In this embodiment, the heat exchange plate is provided as a metal plate, and the metal plate has both good structural strength and good thermal conductivity, i.e., the heat exchange plate can also have a certain structural strength while simultaneously ensuring a certain heat exchange efficiency of the heat exchange element 31.

[0091] For example, the at least two heat exchange plates are welded together. That is, the heat exchange plates are joined by welding to form the heat exchange element 31, and in this way the reliability of the connection structure between the heat exchange plates can be improved.

[0092] For example, the heat exchange plates are joined together by brazing.

[0093] Brazing allows different metals (e.g., aluminum matrix composites) to be joined together through a hot-rolled bonding process, resulting in a material with high mechanical strength, corrosion resistance, and fatigue resistance, making it suitable for load-bearing and harsh environments. Furthermore, brazed joints exhibit good gas and liquid tightness, facilitating the joining of heterogeneous metals and alloys. Additionally, the dimensions and path of the medium flow channel 314 can be freely designed, making it suitable for complex scenarios where heat source distribution is irregular or space is limited.

[0094] The heat exchange element 31 comprises at least two heat exchange plates, which are stacked to form at least one medium flow channel 314. This increases the design flexibility of the heat exchange element 31 and allows for free customization of the dimensions and path of the medium flow channel 314. This is suitable for complex scenarios where the heat source distribution is irregular or space is limited, and it further improves heat exchange efficiency. The design flexibility is further enhanced by providing the at least one heat exchange plate with a projecting section 313 to form the medium flow channel 314 at the projecting section 313.

[0095] For example, the heat exchange element 31 and the battery layer 10 can be joined together by applying adhesive, and the blocking element 40 can serve as a spacer for the adhesive to prevent the adhesive from flowing out.

[0096] For example, with reference to Fig. 5 to 8, the first surface 3111 of the heat exchange element 31 is configured to support the battery layer 10. A blocking element 40 is provided on the first surface 3111, and the blocking element 40 lies between the battery layer 10 and the first surface 3111.

[0097] The blocking element 40 lies between the battery layer 10 and the first surface 3111, i.e. the upper battery layer 10 is pressed against the blocking element 40 and not against the heat exchange element 31, and the blocking element 40 can serve as a support, and in this way a situation in which the battery layer 10 squeezes the medium flow channel 314 can be avoided to a certain extent.

[0098] For example, the blocking element 40 can be higher than the projection section 313, and the medium flow channel 314 is formed within the projection section 313, so that the upper battery layer 10 presses on the blocking element 40 and not on the projection section 313.

[0099] The first surface 3111 of the heat exchange element 31 is configured to support the battery layer 10, and the blocking element 40 is located between the battery layer 10 and the first surface 3111. That is, by pressing the upper battery layer 10 against the blocking element 40, the blocking element 40 can act as a support, thereby improving the situation in which the upper battery layer 10 is pressed against the medium flow channel 314 and thus reducing the possibility of the upper battery layer 10 crushing the medium flow channel 314, which is conducive to improving the reliability of the battery device 100. Furthermore, the arrangement of the blocking element 40 can also serve as a spacer for the adhesive, thus improving the situation in which the adhesive flows out to the outside of the battery layer 10.

[0100] For example, the heating element 32 can be a heating film, and furthermore, the heating element 32 can be an electric heating film.

[0101] For example, the heating element 32 has a heating resistor inside, and the heating resistor generates heat when it is supplied with energy to heat the battery layer 10.

[0102] With reference to Fig. 4 to 6 the heating element 32 is provided between the battery layer 10 and the heat exchange element 31, i.e. the heat exchange element 31 is in contact with the battery layer 10 through the heating element 32.

[0103] If the battery layer 10 needs to be heated, the heat generated by the heating element 32 can be transferred directly to the battery layer 10, or it can be transferred to the battery layer 10 via the heat exchanger element 31, and the material of the heat exchanger element 31 itself can transfer the heat generated by the heating element 32 better to the battery layer 10, so that the heating element 32 can heat the two adjacent battery layers 10 simultaneously, which improves the heating efficiency.

[0104] If the battery layer 10 needs to be cooled, the cold generated by the heat exchange element 31 can be transferred directly to the battery layer 10, or it can be transferred to the battery layer 10 via the heating element 32 (at this time the heating element 32 does not generate heat) to achieve heat dissipation for the battery layer 10.

[0105] For example, the heating element 32 can first be attached to the surface of the heat exchange element 31, and then the heat exchange element 31 and the heating element 32 are attached to the battery layer 10, e.g., by applying adhesive. Of course, it is also possible to first attach the heating element 32 to the battery layer 10, and then attach the heat exchange element 31 to the heating element 32 and the battery layer 10 by gluing.

[0106] The embodiments of the present disclosure provide a battery device 100 comprising a box assembly 20, a thermal management assembly 30, and a battery assembly, wherein the battery layer 10 is provided within the box assembly 20, the box assembly 20 providing protection for the battery layer 10. On the one hand, multiple battery layers 10 are provided, which contributes to increasing the performance of the battery device 100. Furthermore, the battery layers 10 are stacked along the vertical direction of the battery device 100, which also contributes to fully utilizing the space within the box assembly 20 and improving the energy density of the battery device 100.On the other hand, the heat exchange element 31 is provided between several battery layers 10. This element is capable of simultaneously exchanging heat for the battery layers 10 located on opposite sides of the heat exchange element 31, thus improving the heat exchange efficiency of the heat exchange element 31 with respect to the battery layers 10. In other words, the energy density of the battery device 100 can be improved simultaneously with the improvement in heat exchange efficiency. Furthermore, a heating element 32 is provided between the battery layer 10 and the heat exchange element 31, or between the battery layer 10 and the box assembly 20.If the battery layers 10 need to be heated, the heat generated by the heating element 32 can be transferred to them, allowing the battery layers 10 to be heated under low-temperature operating conditions and thus improving the cycle performance and lifespan of the battery device. Furthermore, the heating element's design for heating the battery layers is simple, eliminating the need for a separate heating device for the heat exchange medium, which simplifies the design and reduces costs. Additionally, if the heating element 32 is positioned between adjacent battery layers 10, it can heat them simultaneously, improving heating efficiency.

[0107] In this case, there are various embodiments in which the at least one heat exchange plate has a projecting section 313.

[0108] In some embodiments, with reference to Fig. 5 to 8, the heat exchange element 31 comprises at least two heat exchange plates, wherein the heat exchange plates comprise a first heat exchange plate 311 and a second heat exchange plate 312, wherein a part of the first heat exchange plate 311 protrudes to form a projection section 313, wherein the first heat exchange plate 311 and the second heat exchange plate 312 are stacked, the projection section 313 and the second heat exchange plate 312 forming the medium flow channel 314.

[0109] This means that only part of the first heat exchange plate 311 needs to protrude to form the projection section 313, and the second heat exchange plate 312 does not need to form the projection section 313, which is helpful to reduce the process of forming the projection section 313 on the second heat exchange plate 312, and can reduce the difficulty of positioning between the first heat exchange plate 311 and the second heat exchange plate 312, which is helpful to improve production efficiency.

[0110] In other embodiments, part of the first heat exchange plate 311 and part of the second heat exchange plate 312 protrude to form the projection section 313.

[0111] For example, the first heat exchange plate 311 is provided above the second heat exchange plate 312, so that the first heat exchange plate 311 has a first surface 3111.

[0112] In some embodiments, the first surface 3111 is a surface on the side of the first heat exchange plate 311 facing away from the second heat exchange plate 312.

[0113] In this case, the projecting section 313 of the first heat exchange plate 311 and the projecting section 313 of the second heat exchange plate 312 can be arranged opposite each other, so that a medium flow channel 314 is formed between the projecting section 313 of the first heat exchange plate 311 and the projecting section 313 of the second heat exchange plate 312; or the projecting section 313 of the first heat exchange plate 311 and the projecting section 313 of the second heat exchange plate 312 are offset such that they enclose the formation of the medium flow channel 314 between the projecting section 313 of the first heat exchange plate 311 and the non-projecting section of the second heat exchange plate 312 and the formation of the medium flow channel 314 between the projecting section 313 of the second heat exchange plate 312 and the non-projecting section of the first heat exchange plate 311.

[0114] In some exemplary embodiments, with reference to the Fig. 5 to 6, the multilayer battery layer 10 comprises a first battery layer 12 and a second battery layer 13, which are arranged side by side, with the second battery layer 13 being located above the first battery layer 12. On one side of the heat exchange element 31 facing the first battery layer 12, a first adaptation level 3121 is formed, with the heating element 32 being provided between the first adaptation level 3121 and the first battery layer 12.

[0115] For example, on one of the sides of the second heat exchange plate 312 facing away from the first heat exchange plate 311, the first adaptation plane 3121 is formed, with the first adaptation plane 3121 facing the first battery layer 12 and the first heat exchange plate 311 facing the second battery layer 13.

[0116] The multilayer battery layer 10 can include further battery layers 10 in addition to the first battery layer 12 and the second battery layer 13, e.g. a third battery layer 10 or similar, and the third battery layer 10 can be arranged below the first battery layer 12 or above the second battery layer 13.

[0117] A heat exchange element 31 is provided between the first battery layer 12 and the second battery layer 13.

[0118] In this case, the first heat exchange plate 311 and the second heat exchange plate 312 are stacked, with the first heat exchange plate 311 located above the second heat exchange plate 312, and a first adaptation plane 3121 being formed on the side of the second heat exchange plate 312 facing away from the first heat exchange plate 311. That is, the first adaptation plane 3121 serves to adapt to the first battery layer 12, and the projecting section 313 is provided on the side of the heat exchange element 31 facing the second battery layer 13.

[0119] In this embodiment, a first adaptation level 3121 is formed on one side of the heat exchange element 31 facing the first battery layer 12, with the heating element 32 being provided between the first adaptation level 3121 and the first battery layer 12. In this way, it is possible to improve the interaction of the heating element 32 with the first battery layer 12 and with the heat exchange element 31.

[0120] For example, the heating element 32 is attached to the first adaptation level 3121.

[0121] This means that the heating element 32 can first be attached to the first adaptation level 3121 to form a pre-assembled element of the heating element 32 with the heat exchange element 31, and then the pre-assembled element can interact with the first battery layer 12, e.g. by gluing and fastening.

[0122] Of course, it is also possible that the heating element 32 is first attached to the first battery layer 12 to form a pre-assembled element of the heating element 32 on the first battery layer 12, and that the pre-assembled element is then attached to the heat exchange element 31 by applying adhesive.

[0123] In this case, the heating element 32 is attached to the first adaptation level 3121 to facilitate the arrangement of the heating element 32 so that the heating element 32 can be better attached to the heat exchange element 31.

[0124] In some embodiments, with reference to Fig. 7 to 8, the heat exchange element 31 comprises a first flow channel group 316 and a second flow channel group 317, wherein the first flow channel group 316 comprises an inlet opening 318 and at least one medium flow channel 314, and the second flow channel group 317 comprises an outlet opening 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 connected to the inlet opening 318, and one end of the medium flow channel 314 of the second flow channel group 317 is connected to the outlet opening 319, and an end of the medium flow channel 314 of the first flow channel group 316 facing away from the inlet opening 318 and an end of the medium flow channel 314 of the second flow channel group 317 facing away from the outlet opening 319 are connected to each other.

[0125] This means that the heat exchange medium flows from the inlet opening 318 into the medium flow channel 314 of the first flow channel group 316, then flows into the medium flow channel 314 of the second flow channel group 317 and flows out of the outlet opening 319.

[0126] In the embodiment in which the first flow channel group 316 comprises several medium flow channels 314, the same end of several medium flow channels 314 of the first flow channel group 316 is connected to the inlet opening 318.

[0127] In the embodiment in which the second flow channel group 317 comprises several medium flow channels 314, the same end of several medium flow channels 314 of the second flow channel group 317 is connected to the outlet opening 319.

[0128] In this embodiment, the heat exchange element 31 comprises 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 is connected to the inlet opening 318 and the medium flow channel 314 of the second flow channel group 317 is connected to the outlet opening 319. The dimensions and path of the medium flow channel 314 can be freely designed according to the heat distribution or the spatial distribution of the battery cell 11, which contributes to a further improvement in heat exchange efficiency.

[0129] In some embodiments, with reference to Fig. 5 to 8, each battery layer 10 comprises several battery cells 11 arranged in a first direction, wherein the medium flow channel 314 extends in the first direction, and the first flow channel group 316 and the second flow channel group 317 are arranged in a second direction, wherein the first direction intersects with the second direction.

[0130] In this case, the inlet opening 318 and the outlet opening 319 can be located on the same side of the heat exchange element 31 along the first direction or on different sides of the heat exchange element 31 along the first direction.

[0131] In this embodiment, it is advantageous to improve the uniformity of the heat exchange and thus the temperature uniformity of the battery cell 11 by setting the arrangement direction of the battery cell 11 in the same direction as the extension direction of the medium flow channel 314.

[0132] In some embodiments, with reference to Fig. 6 to 8, the dimension h1 of the battery cell 11 along the vertical direction of the battery device 100 and the dimension h2 of the battery cell 11 along the first direction is smaller than the dimension h3 of the battery cell 11 along the second direction, wherein the first direction, the second direction and the vertical direction of the battery device 100 intersect, wherein the dimension of the battery cell 11 along the second direction lies in a range of 300 mm to 1200 mm.

[0133] The dimension of the battery cell 11 along the second direction can be 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 value between two of these values.

[0134] Here, h1, h2 and h3 can be measured at room temperature using a measuring tool such as a caliper before the battery device 100 is used.

[0135] It should be noted that h1, h2 and h3 do not include the dimensions of the electrode column 111 and / or the pressure relief structure, i.e. h1, h2 and h3 can be determined by measuring the dimensions of the battery cell housing 11.

[0136] In this embodiment, by defining the dimensions of the battery cell 11 along the second direction in the range of 300 mm to 1200 mm, the performance and assembly efficiency of the battery device 100 can be taken into account.

[0137] For example, in this embodiment, the battery cell 11 can be a blade battery with a shape that is both long and thin.

[0138] It may be that the dimension of battery cell 11 along the vertical direction of the battery device 100 is larger than the dimension of battery cell 11 along the first direction, or it may be that the dimension of battery cell 11 along the vertical direction of the battery device 100 is smaller than the dimension of battery cell 11 along the first direction.

[0139] It is understood that, while it is possible to facilitate the stacking of the battery cells 11 along the first direction, it is also possible to facilitate the stacking of the battery cells 11 along the vertical direction, i.e., it is possible to increase the number of battery cells 11 in the first direction and in the vertical direction to increase the power of the battery device 100.

[0140] In some embodiments, with reference to Fig. 7 and Fig. 8, the battery cells 11 further comprise an electrode column 111 and / or a pressure relief structure, wherein the electrode column 111 and / or the pressure relief structure are provided on at least one side of the battery cells 11 along a second direction, wherein the first direction, the second direction and the vertical direction of the battery device 100 intersect.

[0141] It is understood that the battery cells 11 of the battery layer 10 are arranged along the first direction and that the battery layers 10 are stacked along the vertical direction of the battery device 100. Consequently, it is not practical to arrange the electrode column 111 and / or the pressure relief structure in the first direction and in the vertical direction of the battery device 100. For example, if the electrode column 111 and / or the pressure relief structure were to be provided in the first direction or in the vertical direction of the battery device 100, the electrode column 111 and / or the pressure relief structure would have to be avoided, which would not be conducive to improving the compactness of the structure.

[0142] In this way, when the battery cells 11 are stacked along the first direction, the electrode column 111 is provided at the sides of the battery cells 11, which facilitates the electrical connection of several battery cells 11 to achieve a series and / or parallel connection. It should be noted that the electrode column 111 comprises a cathode column 111 and an anode column 111, and that during the charging and discharging process of the battery, the cathode column 111 and the anode column 111 are electrically connected to form a circuit loop, and that several cathode columns 111 and / or anode columns 111 of the battery cells 11 can also be electrically connected to achieve a series and / or parallel connection.

[0143] In this embodiment, the arrangement of the electrode column 111 and / or the pressure relief structure on at least one side of the battery cell 11 along the second direction is advantageous, on the one hand, to improve the structural compactness of the battery device 100, and on the other hand, it is also advantageous to reduce the case of damage to the electrode column 111 and / or the pressure relief structure in the process of stacking the battery cells 11 and / or the battery layers 10.

[0144] In some embodiments, with reference to Fig. 5 to 8, the first flow channel group 316 along the second direction is closer to the electrode column 111 and / or the pressure relief structure than the second flow channel group 317.

[0145] In this case, the medium flow channel 314 of the first flow channel group 316 is connected to the inlet opening 318, and the medium flow channel 314 of the second flow channel group 317 is connected to the outlet opening 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 through the medium flow channel 314 of the second flow channel group 317, so that 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 the battery cell 11 at one end facing the electrode column 111 and / or the pressure relief structure is relatively higher than the temperature at the end facing away from the electrode column 111 and / or the pressure relief structure.By arranging the first flow channel group 316 closer to the electrode column 111 and / or the pressure relief structure compared to the second flow channel group 317, the heat exchange efficiency is improved and the temperature uniformity of the battery cell 11 is improved.

[0146] In some embodiments, which relate to the Fig. Referring to 7 to 8, each battery layer 10 comprises several battery cells 11 arranged in a row along a first direction, the projection 313 is provided with a spacer 40 along at least one side of the second direction, and the first direction, the second direction and the vertical direction of the battery device 100 overlap.

[0147] It is possible that the projection section 313 is provided with the blocking element 40 on one side along the second direction, or it is possible that the projection section 313 is provided with the blocking element 40 on both sides along the second direction.

[0148] Of course, the blocking element 40 can also be provided at a central position of the projection section 313, e.g. the blocking element 40 can be provided at a gap between adjacent medium flow channels 314.

[0149] For example, the blocking element 40 extends in a first direction.

[0150] In this embodiment, the projecting section 313 is provided with the blocking element 40 on at least one side along the second direction, which helps to act as a spacer for the adhesive, thereby further improving the situation in which the adhesive flows out.

[0151] In some embodiments, with reference to Fig. 7 to 8, the projecting section 313 is provided with blocking elements 40 on both sides along the second direction, and the two blocking elements 40 are supported at each end of the battery cell 11 along the second direction.

[0152] In other words, the two blocking elements 40 are each arranged on the outside of the projecting section 313 along the second direction, which further facilitates the improvement of the adhesive flow situation. Furthermore, by supporting the two blocking elements 40 at each end of the battery cell 11 along the second direction, it is advantageous to improve the supporting effect of the blocking elements 40 on the battery cell 11, which further reduces the possibility of the medium flow channel 314 being squeezed through the upper layer of the battery layer 10 and can thereby further improve the reliability of the battery device 100.

[0153] In some embodiments, with reference to Fig. 5 to 8, each of the battery layers 10 comprises several battery cells 11 arranged along a first direction, the battery assembly further comprising at least one end plate 50, the battery layer 10 being provided with the end plate 50 at at least one end along the first direction, and at least one end of the heat exchange element 31 being connected to the end plate 50 along the first direction, the first direction intersecting with the vertical direction of the battery device 100.

[0154] The number of end plates (50) can be one or more.

[0155] The battery layer 10 can be provided with the end plate 50 at one end along the first direction, and the other end can rest against a side wall of the box assembly 20. The battery layer 10 can also be provided with end plates 50 at both ends in the first direction.

[0156] In the embodiment in which the battery layer 10 is provided with end plates 50 at both ends along the first direction, both ends of the heat exchange element 31 are connected to the end plates 50 along the first direction.

[0157] Here, the end plates 50 are used to confine the battery layer 10 in the first direction and to withstand at least the expansion force of the battery cell 11. The expansion force here refers specifically to the force exerted on the box assembly 20 due to the expansion and deformation of the battery cell 11. For example, the end plate 50 is primarily subjected to the expansion force in the first direction.

[0158] In some related technologies, the end plate 50 is also referred to as an expansion joint.

[0159] The specific structure and material of the end plate 50 are not limited; for example, the end plate 50 can be a support-shaped structure, and the end plate 50 can be made from any suitable material, such as a metal material, a polymer material, a composite material, and the like.

[0160] The specific connection between the heat exchange element 31 and the end plate 50 is not limited and can be a fastening connection, a snap connection or a welded connection to easily transfer the force exerted on the heat exchange element 31 to the end plate 50.

[0161] For example, with reference to Fig. 3. The box assembly 20 comprises a frame and a bottom wall. The frame is positioned along one edge of the bottom wall. Together, the frame and the bottom wall enclose a receiving space, and the end plate 50 is connected to the frame. It is evident that the heat exchange element 31 is capable of transmitting the force exerted on the end plate 50, and the end plate 50 is capable of transmitting the force exerted on the frame; that is, the frame is capable of supporting the end plate 50, and the end plate 50 is capable of supporting the heat exchange element 31.

[0162] For example, the end plates 50 are connected to the frame at both ends along the second direction.

[0163] For example, the end plates 50 can first be connected to the frame and then the battery layer 10 is assembled, or the end plates 50 can first be assembled with the battery layer 10 and then the end plates 50 are mounted to the frame with the pre-assembled element of the battery layer 10.

[0164] In this embodiment, an end plate 50 is provided at at least one end of the battery layer 10 along the first direction, and the at least one end of the heat exchanger element 31 along the first direction is connected to the end plate 50. In this way, it is advantageous for the heat exchanger element 31 to transfer the force it absorbs to a frame via the end plate 50, which helps to increase the support strength for the battery layer 10 and also reduces the probability of the lower battery layer 10 being damaged by extrusion of the battery layers placed on top of it due to over-stacking of the battery layers 10, thus improving the reliability of the battery device 100 and simultaneously increasing its performance.

[0165] In some exemplary embodiments, with reference to the Fig. 3 to 5, the multilayer battery layer 10 comprises a first battery layer 12 and a second battery layer 13, the second battery layer 13 being located above the first battery layer 12. The end plate 50 comprises a first end plate 51 and a second end plate 52, which are arranged opposite each other along the first direction, the first battery layer 12 is located between the first end plate 51 and the second end plate 52, and the heat exchange element 31 is connected to the ends of both the first end plate 51 and the second end plate 52 along the first direction.

[0166] This means that the heat exchanger 31, which is provided 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, which correspond to the first battery layer 12. In other words, the heat exchanger 31 is connected to the end plate 50, which corresponds to the battery layer 10 below.

[0167] In some embodiments, with reference to Fig. 3 to 5, the end plate 50 comprises a third end plate 53 and a fourth end plate 54, which are provided opposite each other along the first direction, the second battery layer 13 is provided between the third end plate 53 and the fourth end plate 54, and the heat exchange element 31 is connected to the third end plate 53 and the fourth end plate 54 at both ends along the first direction.

[0168] This means that the heat exchanger 31, which is provided 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, which correspond to the second battery layer 13. In other words, the heat exchanger 31 is connected to the end plate 50, which corresponds to the battery layer 10 above it.

[0169] In this case, the heat exchange element 31, the third end plate 53, the fourth end plate 54 and the second battery layer 13 form a whole which is then stacked with the other battery layers 10, contributing to the improvement of the overall structural strength of the battery device 100.

[0170] In some other embodiments, the heat exchange element 31 can be connected simultaneously to the first end plate 51, the second end plate 52, the third end plate 53 and the fourth end plate 54.

[0171] Of course, there are also embodiments in which the battery layer 10 is used to support the upper heat exchange element 31.

[0172] This means that the weight of the heat exchange element 31 is supported by the battery layer 10, i.e., the battery layer 10 is used to support the upper heat exchange element 31.

[0173] In some embodiments, the battery assembly includes a mounting bracket, the mounting bracket is connected to the box assembly 20, and the heat exchanger 31 is connected to the mounting bracket.

[0174] For example, the mounting bracket is connected to the bottom wall of the box assembly 20.

[0175] For example, the mounting bracket is connected to the frame of the box assembly 20.

[0176] In some embodiments, with reference to Fig. 7, the heat exchange element 31 forms a first flap section 315 at at least one end along the first direction, wherein the first flap section 315 is connected to the end plate 50.

[0177] The heat exchange element 31 can be configured with the first flap section 315 at one of the ends along the first direction or with the first flap section 315 at both ends along the first direction.

[0178] This means that the heat exchange element 31 is folded in a direction facing the end plate 50 to form a first flap section 315 and is connected to the end plate 50 by the first flap section 315, which represents a simple and reliable connection structure and is easy to manufacture.

[0179] In some embodiments, with reference to Fig. 3 to 4, the heating element 32 is provided on the top side of the uppermost battery layer 10.

[0180] In this way, the reliability of the battery device 100 is further improved in order to achieve heating of the top of the uppermost battery layer 10.

[0181] In some embodiments, with reference to Fig. 3 to 4, the heat management assembly 30 further comprises a top cover 33, wherein the top cover 33 is provided on the top of the uppermost battery layer 10, wherein the heating element 32 is provided between the top cover 33 and the uppermost battery layer 10.

[0182] This means that the heating element 32 can first be attached to the surface of the upper cover 33 to form a pre-assembled element of the heating element 32 with the upper cover 33, and then the pre-assembled element can interact with the top battery layer 10, e.g. by gluing and fastening.

[0183] Of course, it is also possible that the heating element 32 is first attached to the top battery layer 10 to form a pre-assembled element of the heating element 32 on the top battery layer 10, and that the pre-assembled element is then attached to the top cover 33 by applying adhesive.

[0184] In this embodiment, by arranging an upper cover 33 and a heating element 32 between the upper cover 33 and the uppermost battery layer 10, it is advantageous to arrange the heating element 32 in such a way that the heating element 32 can be better attached to the heat exchange element 31 and the heating element 32 can be protected, thereby improving the reliability of the heat management assembly 30.

[0185] In some embodiments, with reference to Fig.3 to 4, the upper cover 33 forms a second flap section 331 at at least one end along the first direction, the second flap section 331 being connected to the end plate 50.

[0186] The upper cover 33 can be formed with the second flap section 331 at one of the ends along the first direction or with the second flap section 331 at both ends along the first direction.

[0187] That is, the upper cover 33 is folded in a direction facing the end plate 50 to form a second flap section 331 and is connected to the end plate 50 by the second flap section 331, which represents a simple and reliable connection structure and is easy to manufacture.

[0188] The connection of the second flap section 331 to the end plate 50 can be made in an unlimited number of ways, e.g. by a fastening connection, a snap connection or a weld connection. The connection structure is simple and reliable.

[0189] In this disclosure, the terms “shows an embodiment”, “some embodiments”, “example”, “specific example” or “a particular example”, “an embodiment”, “some examples”, “exemplary”, “specific examples” or “some examples” mean that certain features, structures, materials or properties described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this disclosure, the schematic expressions of the above terms need not refer to the same embodiments or examples. Furthermore, the described specific features, structures, materials or properties may be combined appropriately in one or more embodiments.Furthermore, the person skilled in the art can combine different embodiments and features of different embodiments described in the present disclosure without contradicting each other.

[0190] The foregoing statements represent only a preferred embodiment of the present disclosure and are not intended to limit the present disclosure, which may be subject to various modifications and alterations for the person skilled in the art. All changes, equivalent replacements, improvements, etc., made within the spirit and principles of the present disclosure fall within the scope of protection of the present disclosure.

Claims

[1] Battery device comprising the following: a box assembly; a battery assembly, wherein the battery assembly comprises several battery layers stacked in a vertical direction of the battery device, with several battery layers being provided within the box assembly; a heat management assembly, wherein the heat management assembly comprises a heat exchange element and a heating element, wherein the heat exchange element has at least one medium flow channel inside, wherein at least one medium flow channel is used to guide a heat exchange medium, and wherein the heat exchange medium is used for heat exchange with the battery layers; wherein the heat exchange element is provided between several battery layers, wherein the heat exchange element is used to support at least part of the battery layers; wherein the heating element is provided between the battery layers and the heat exchange element, or wherein the heating element is provided between the battery layers and the box assembly. [2] Battery device according to claim 1, wherein several battery layers comprise a first battery layer and a second battery layer arranged side by side, the second battery layer being located above the first battery layer; wherein a first adaptation plane is formed on one side of the heat exchange element facing the first battery layer, the heating element being provided between the first adaptation plane and the first battery layer. [3] Battery device according to claim 2, wherein the heating element is attached to the first adaptation level. [4] Battery device according to claim 2 or 3, wherein the heat exchange element comprises at least two heat exchange plates, the heat exchange plates comprising a first heat exchange plate and a second heat exchange plate, wherein a part of the first heat exchange plate protrudes to form a projection section, wherein the first heat exchange plate and the second heat exchange plate are stacked, the projection section and the second heat exchange plate forming the medium flow channel, wherein the first adaptation plane is formed on a side of the second heat exchange plate facing away from the first heat exchange plate. [5] Battery device according to any one of claims 1 to 4, wherein each of the battery layers comprises several battery cells arranged along a first direction, wherein the battery assembly further comprises at least two end plates, wherein the battery layer is provided with the end plate at both ends along the first direction, wherein the two ends of the heat exchange element are connected to the end plate along the first direction, wherein the first direction intersects with the vertical direction of the battery device. [6] Battery device according to claim 5, wherein the heat exchange element forms a first flap section at both ends along the first direction, wherein the first flap section is connected to the end plate. [7] Battery device according to claim 5 or 6, wherein the heat exchange element is attached, snapped or welded to the end plate. [8] Battery device according to any one of claims 1 to 7, wherein the heating element is provided on the top side of the uppermost battery layer. [9] Battery device according to claim 8, wherein the heat management assembly further comprises a top cover, wherein the top cover is provided on the top surface of the uppermost battery layer, and wherein the heating element is provided between the top cover and the uppermost battery layer. [10] Battery device according to claim 9, wherein each of the battery layers comprises several battery cells arranged along a first direction, wherein the battery assembly further comprises at least two end plates, the battery layer being provided with the end plate at both ends along the first direction; wherein the upper cover forms a second flap section at both ends along the first direction, the second flap section being connected to the end plate. [11] Battery device according to claim 10, wherein the second flap section is attached, snapped or welded to the end plate. [12] Battery device according to any one of claims 1 to 11, wherein each of the battery layers comprises several battery cells arranged along a first direction, wherein the dimension of the battery cell along the vertical direction of the battery device and the dimension of the battery cell along the first direction is smaller than the dimension of the battery cell along the second direction, wherein the first direction, the second direction and the vertical direction of the battery device intersect, wherein the dimension of the battery cell along the second direction is in a range of 300 mm to 1200 mm. [13] Battery device according to any one of claims 1 to 12, wherein each of the battery layers comprises several battery cells arranged along a first direction, wherein the battery cells further comprise an electrode column and / or a pressure relief structure, wherein the electrode column and / or the pressure relief structure is provided on at least one side of the battery cells along a second direction, wherein the first direction, the second direction and the vertical direction of the battery device intersect. [14] Power-consuming device comprising a battery device according to any one of claims 1 to 13.

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