Battery device, electric device, and case for battery device

Abstract

The utility model discloses a battery device, a power utilization device and a box body of the battery device, and relates to the technical field of batteries, the battery device comprises a box body and a battery monomer, and the battery monomer is arranged in the box body; and the heat dissipation structure is fixedly arranged on the box body, one part of the heat dissipation structure is positioned in the box body and is in heat exchange fit with the battery monomers, and the other part of the heat dissipation structure is positioned outside the box body. Part of the heat dissipation structure is located in the box body and matched with the battery monomers in a heat exchange mode, the other part of the heat dissipation structure is located outside the box body and exchanges heat with the external environment, heat of the battery monomers can be transmitted to the outside of the box body through the heat dissipation structure, and therefore the heat dissipation effect of the battery device is achieved, and the heat dissipation structure is simple in structure, easy and convenient to assemble and low in cost. The manufacturing difficulty of the battery device is reduced, the assembly efficiency of the battery device is improved, and in addition, the problem of leakage of cooling liquid can be effectively solved, so that the use safety of the battery device is effectively improved, and the service life of the battery device is effectively prolonged.

Description

Technical Field

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

[0002] In the related art, a water cooling plate is provided between adjacent battery cells in a battery device, and a coolant can flow inside the water cooling plate, exchanging heat with the battery cells through the water cooling plate, so that the coolant in the water cooling plate takes away the heat of the battery device. However, providing a water cooling plate between any adjacent battery cells and interconnecting the water cooling plates makes assembly cumbersome and raises the risk of coolant leakage. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a battery device with a simple structure and easy assembly, which can also effectively solve the problem of coolant leakage and improve the safety and service life of the battery device.

[0004] The present application further proposes an electrical device.

[0005] The present application further proposes a box of a battery device.

[0006] In a first aspect, an embodiment of the present application provides a battery device, comprising: a case and a battery cell, wherein the battery cell is disposed in the case; a heat dissipation structure, wherein the heat dissipation structure is fixedly disposed in the case, wherein a portion of the heat dissipation structure is located in the case and cooperates with the battery cell for heat exchange, and another portion of the heat dissipation structure is located outside the case, and the heat dissipation structure and the case are integrally formed.

[0007] In the above technical solution, by setting a part of the heat dissipation structure inside the box body to cooperate with the heat exchange of the battery monomer, and another part of the heat dissipation structure outside the box body to exchange heat with the external environment, the heat of the battery monomer can be transferred to the outside of the box body through the heat dissipation structure, thereby achieving the heat dissipation effect of the battery device. In addition, the heat dissipation structure has a simple structure and is easy to assemble, which is conducive to reducing the manufacturing difficulty of the battery device and improving the assembly efficiency of the battery device. In addition, it can also effectively solve the problem of coolant leakage, thereby effectively improving the use safety and service life of the battery device. The heat dissipation structure and the box body are integrally formed, which can improve the connection reliability of the heat dissipation structure and the box body, and can reduce the probability of fracture at the connection between the heat dissipation structure and the box body, thereby improving the structural reliability of the battery device, and can also reduce the production molds and production processes in the production process of the battery device, thereby reducing the production cost of the battery device, and is also conducive to improving the production efficiency of the battery device.

[0008] In some embodiments, another portion of the heat dissipation structure is located below the box.

[0009] In the above technical solution, the other part of the heat dissipation structure is located below the box body, so that the other part of the heat dissipation structure can be set away from the vehicle chassis, thereby reducing the risk of heat from other components on the chassis (such as: engine, exhaust pipe, etc.) being transferred to the heat dissipation structure, thereby reducing the risk of heat dissipation failure of the battery device or even the risk of the battery device exploding due to excessive temperature. It can also reduce the risk of other components on the vehicle chassis blocking the airflow, which is conducive to improving the heat dissipation effect of the heat dissipation structure, and is conducive to the battery device working within a suitable temperature range, thereby further improving the safety and service life of the battery device.

[0010] In some embodiments, the heat dissipation structure abuts against the battery cell.

[0011] In the above technical solution, the heat dissipation structure and the battery cell are abutted, which can reduce the heat transfer path of the heat dissipation structure and the battery cell, thereby reducing the thermal resistance between the heat dissipation structure and the battery cell, which is beneficial for the heat generated by the battery cell to be quickly transferred to the heat dissipation structure, thereby improving the heat exchange efficiency of the heat dissipation structure and the battery cell, reducing the risk of heat accumulation in the battery cell due to slow heat exchange efficiency, and further reducing the risk of damage to the battery cell due to continuous increase in the temperature of the battery cell, which is beneficial for increasing the service life of the battery cell.

[0012] In some embodiments, the battery cell has a first side wall and a second side wall that are adjacent to each other, the area of ​​the first side wall is greater than the area of ​​the second side wall, and the heat dissipation structure abuts against the first side wall.

[0013] In the above technical solution, the heat dissipation structure abuts against the first side wall of the battery cell, which can increase the contact area between the heat dissipation structure and the battery cell, so that the heat of the battery cell is evenly transferred to the heat dissipation structure, thereby reducing the temperature difference between different positions of the battery cell, reducing the risk of local overheating of the battery cell, and thus improving the temperature uniformity of the battery device. It can also further improve the heat exchange efficiency of the heat dissipation structure and the battery cell, reduce the risk of heat accumulation in the battery cell due to slow heat exchange efficiency, and thus reduce the risk of damage to the battery cell due to continuous temperature increase of the battery cell, which is conducive to further improving the service life of the battery cell. In addition, the heat dissipation structure can effectively support the battery cell and improve the stability of the battery cell position.

[0014] In some embodiments, the heat dissipation structure is a metal member.

[0015] In the above technical solution, the heat dissipation structure is a metal part, which can make the heat dissipation structure have a higher thermal conductivity, which is conducive to the rapid transfer of heat from the battery cell to the part of the heat dissipation structure located in the box, and quickly spread to the entire heat dissipation structure, thereby improving the heat exchange efficiency between the battery cell and the heat dissipation structure. It is also conducive to the heat dissipation structure being processed into a shape that is compatible with the battery cell according to the shape and arrangement of the battery cell, so that the heat dissipation structure can better meet the heat dissipation requirements of the battery device. In addition, the support strength of the heat dissipation structure is improved, and the stability of the battery cell position is further improved.

[0016] In some embodiments, the heat dissipation structure is a plate-shaped structure.

[0017] In the above technical solution, the heat dissipation structure is a plate-like structure, which can increase the surface area of ​​the heat dissipation structure, which is conducive to improving the heat exchange efficiency between the heat dissipation structure and the battery cell and the heat dissipation efficiency of the heat dissipation structure itself, thereby further improving the heat dissipation effect of the battery device. The thickness of the heat dissipation structure can also be made smaller, which is conducive to the heat dissipation structure being smoothly assembled in the gap between two adjacent battery cells. Furthermore, the thickness of the heat dissipation structure can be adjusted according to the distance between the battery cells of different battery devices, so that the heat dissipation structure can be adapted to different battery devices, thereby improving the versatility of the heat dissipation structure.

[0018] In some embodiments, the thickness of the heat dissipation structure is greater than or equal to 1 mm and less than or equal to 3 mm.

[0019] In the above technical solution, by making the thickness of the heat dissipation structure greater than or equal to 1 mm and less than or equal to 3 mm, the heat dissipation structure can reliably support the battery cell. On the basis of the heat dissipation structure meeting the structural strength requirements, it is beneficial to reduce the space occupied by the heat dissipation structure, so that there is more space in the box for assembling battery cells, which is beneficial to improving the energy density of the battery device, and is also beneficial to the conduction of heat on the heat dissipation structure, thereby improving the heat dissipation efficiency.

[0020] In some embodiments, the box body defines an installation cavity, the battery cell is disposed in the installation cavity, and the heat dissipation structure is disposed through the bottom wall of the installation cavity.

[0021] In the above technical solution, the battery cell is arranged in the installation cavity, so that the battery cell can work stably in the installation cavity, which is conducive to reducing the impact of the external environment on the battery cell, thereby improving the working stability of the battery cell and extending the service life of the battery cell. The heat dissipation structure is arranged through the bottom wall of the installation cavity, so that part of the heat dissipation structure is located in the box body and the other part is located outside the box body, so that the heat generated by the battery cell can be transferred to the external environment, thereby achieving the effect of heat dissipation of the heat of the battery cell through the heat dissipation structure, which is conducive to the battery device working within a suitable temperature range, thereby improving the safety and service life of the battery device.

[0022] In some embodiments, the box body includes an upper box body and a lower box body, the upper box body and the lower box body are connected to define an installation cavity, and the box body bottom wall of the lower box body is configured as a cavity bottom wall.

[0023] In the above technical solution, the box body includes an upper box body and a lower box body, and the upper box body and the lower box body are connected to define an installation cavity. The battery monomer is assembled to the lower box body through the open side of the lower box body, and the upper box body is covered on the open side of the lower box body, so that the battery monomer can be smoothly assembled in the installation cavity. The box body bottom wall of the lower box body is constructed as a cavity bottom wall, and the heat dissipation structure is penetrated through the cavity bottom wall, so that another part of the heat dissipation structure can be located outside the box body, so that the other part of the heat dissipation structure located outside the box body can exchange heat with the external environment, which is conducive to the heat of the battery monomer being transferred to the outside of the box body through the heat dissipation structure, thereby achieving the heat dissipation effect of the battery device.

[0024] In some embodiments, an outer surface of the cavity bottom wall is formed with a mounting groove recessed toward the cavity bottom wall, another portion of the heat dissipation structure is located in the mounting groove, and a height dimension of the other portion of the heat dissipation structure along the height direction of the battery device is less than or equal to a depth dimension of the mounting groove.

[0025] In the above technical solution, by making the height dimension of another part of the heat dissipation structure along the height direction of the battery device less than or equal to the depth dimension of the mounting groove, on the basis of ensuring that the heat dissipation structure does not protrude from the lowermost surface of the lower box body, it is beneficial to increase the setting area of ​​the heat dissipation structure outside the box body, thereby further improving the heat dissipation efficiency.

[0026] In some embodiments, the heat dissipation structure extends along a first direction, and the first direction is perpendicular to a height direction of the battery device.

[0027] In the above technical solution, the heat dissipation structure extends along the first direction, so that the battery cell can reliably dissipate heat through the heat dissipation structure, thereby reducing the risk of local overheating of a battery cell due to the lack of abutment with the corresponding heat dissipation structure, or the risk of overheating of a battery cell due to the lack of abutment with the corresponding heat dissipation structure of any one of the multiple battery cells. This can make the temperatures of different parts of a battery cell and multiple battery cells consistent or approximately consistent, which is beneficial to improving the temperature uniformity of the battery device.

[0028] In some embodiments, there are multiple heat dissipation structures, which are arranged in sequence along the second direction, and two adjacent heat dissipation structures are spaced apart to divide the installation cavity into multiple installation spaces, and battery cells are installed in the installation spaces. The first direction, the second direction and the height direction of the battery device are perpendicular to each other.

[0029] In the above technical solution, the heat dissipation structures are arranged in sequence along the second direction, and two adjacent heat dissipation structures are spaced apart to divide the installation cavity into multiple installation spaces. Battery cells are installed in the installation spaces, so that at least one side of any battery cell along the second direction can be abutted by the heat dissipation structure, so that any battery cell can reliably exchange heat with the heat dissipation structure, reducing the risk of overheating of any battery cell among the multiple battery cells, and then making the temperatures of the multiple battery cells consistent or approximately consistent, which is conducive to further improving the temperature uniformity of the battery device.

[0030] In some embodiments, the plurality of heat dissipation structures are parallel to each other.

[0031] In the above technical solution, multiple heat dissipation structures are parallel to each other, which can increase the contact area between the heat dissipation structure and the battery cell, which is conducive to close contact between the heat dissipation structure and the battery cell, thereby reducing the thermal resistance between the heat dissipation structure and the battery cell, so that the heat of the battery cell can be transferred to the heat dissipation structure more quickly, and it is also conducive to achieving the effect of uniform heat dissipation at different positions of the battery device, reducing the risk of local overheating of the battery device, thereby extending the service life of the battery device. In addition, the heat dissipation structure can serve as a reinforcement structure for the box body, reducing the risk of deformation or even cracking of the box body, thereby improving the reliability of the battery device.

[0032] In a second aspect, an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery device.

[0033] In a third aspect, an embodiment of the present application further provides a box body of a battery device, comprising: the box body defines an installation cavity for installing a battery cell, the box body is provided with a heat dissipation structure, part of the heat dissipation structure is located in the installation cavity, and another part of the heat dissipation structure is located outside the box body.

[0034] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0037] Figure 2 A schematic diagram of the structure of a battery device provided in some embodiments of the present application;

[0038] Figure 3 A schematic diagram of the structure of a battery device provided in some embodiments of the present application from another angle;

[0039] Figure 4 A schematic diagram of the assembly of the lower box and heat dissipation structure of the battery device provided in some embodiments of the present application;

[0040] Figure 5 A bottom view of a battery device provided in some embodiments of the present application having a lower box with a heat dissipation structure;

[0041] Figure 6 A top view of a lower box of a battery device provided in some embodiments of the present application having a heat dissipation structure;

[0042] Figure 7 for Figure 6 Cross-sectional view at AA.

[0043] Reference numerals:

[0044] Vehicles 1000;

[0045] Battery device 100; controller 200; motor 300;

[0046] Box 1;

[0047] Installation cavity 11; installation space 111; lower box 12; installation slot 13;

[0048] Battery cell 2; first side wall 21; second side wall 22;

[0049] Heat dissipation structure 3. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0052] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0053] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, B and / or C can represent: B exists alone, B and C exist at the same time, and C exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0055] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0056] The term “plurality” used in this application refers to two or more (including two).

[0057] In the embodiment of the present application, 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.

[0058] 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 hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0059] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0060] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0061] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0062] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0063] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0064] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0065] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0066] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0067] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0068] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0069] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. The battery device consists of a box and multiple battery cells contained in the box. Among them, the battery device, as a core component of new energy vehicles, has high requirements in terms of reliability and cycle life.

[0070] In the related art, a water cooling plate is provided between adjacent battery cells in a battery device, and a coolant can flow inside the water cooling plate, exchanging heat with the battery cells through the water cooling plate, so that the coolant in the water cooling plate takes away the heat of the battery device. However, providing a water cooling plate between any adjacent battery cells and interconnecting the water cooling plates makes assembly cumbersome and raises the risk of coolant leakage.

[0071] Based on the above considerations, in order to solve the technical problems of cumbersome assembly of battery devices and high risk of coolant leakage, the present application proposes a battery device, including: a box body and a battery cell, the battery cell is arranged in the box body; a heat dissipation structure, the heat dissipation structure is fixed to the box body, part of the heat dissipation structure is located in the box body and cooperates with the battery cell for heat exchange, and the other part of the heat dissipation structure is located outside the box body.

[0072] In such a battery device, by arranging a part of the heat dissipation structure to be located inside the box body for heat exchange with the battery cells, and arranging another part of the heat dissipation structure to be located outside the box body for heat exchange with the external environment, the heat of the battery cells can be transferred to the outside of the box body through the heat dissipation structure, thereby achieving the heat dissipation effect of the battery device. In addition, the heat dissipation structure has a simple structure and is easy to assemble, which is conducive to reducing the manufacturing difficulty of the battery device and improving the assembly efficiency of the battery device. In addition, it can also effectively solve the problem of coolant leakage, thereby effectively improving the safety and service life of the battery device.

[0073] The battery device disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships, or aircraft. The battery device disclosed in the present application can be used to form a power supply system of the electrical device.

[0074] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0075] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0076] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0077] Reference below Figure 1-Figure 7 A battery device 100 according to an embodiment of the present application is described.

[0078] Reference Figure 2 and Figure 3 As shown, the battery device 100 according to the embodiment of the present application includes: a box body 1 and a battery cell 2, wherein the battery cell 2 is arranged in the box body 1; a heat dissipation structure 3, wherein the heat dissipation structure 3 is fixed to the box body 1, a part of the heat dissipation structure 3 is located in the box body 1 and cooperates with the battery cell 2 for heat exchange, and another part of the heat dissipation structure 3 is located outside the box body 1. The heat dissipation structure 3 is integrally formed with the box body 1.

[0079] Among them, the box body 1 can provide an assembly space for the battery cell 2, and the battery device 100 may include a plurality of battery cells 2, and the plurality of battery cells 2 are all arranged in the box body 1, so that the plurality of battery cells 2 can work stably in the box body 1. The plurality of battery cells 2 can be connected in series, in parallel, or in mixed connection, and mixed connection means that the plurality of battery cells 2 are both connected in series and in parallel. The plurality of battery cells 2 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the plurality of battery cells 2 is accommodated in the box body 1. Of course, the battery can also be a battery module formed by first connecting a plurality of battery cells 2 in series, in parallel, or in mixed connection, and then the plurality of battery modules are connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the box body 1. The battery device 100 may also include other structures. For example, the battery device 100 may also include a busbar component for realizing electrical connection between the plurality of battery cells 2.

[0080] As some embodiments of the present application, the heat dissipation structure 3 can be constructed of metal materials, such as copper, stainless steel, etc., so that the heat dissipation structure 3 has good heat dissipation efficiency. As some embodiments of the present application, the heat dissipation structure 3 can be constructed of composite materials, such as graphene, carbon fiber, etc., so that the heat dissipation structure 3 has good thermal conductivity, which is also conducive to the lightweight design of the battery device 100.

[0081] As some embodiments of the present application, the heat dissipation structure 3 and the housing 1 can be integrally formed so that the heat dissipation structure 3 is fixed to the housing 1. As some embodiments of the present application, the heat dissipation structure 3 and the housing 1 can be connected by snapping so that the heat dissipation structure 3 is fixed to the housing 1. However, the present application is not limited thereto, and the heat dissipation structure 3 and the housing 1 can also be fixedly connected by other means, as long as the heat dissipation structure 3 is fixed to the housing 1.

[0082] Part of the heat dissipation structure 3 is located in the assembly space of the housing 1 (i.e., the enclosed space in the above embodiment), and the part of the heat dissipation structure 3 located in the assembly space can cooperate with the battery cell 2 in heat exchange, so that the heat of the battery cell 2 can be transferred to the heat dissipation structure 3. Another part of the heat dissipation structure 3 is located outside the housing 1, and the other part of the heat dissipation structure 3 refers to the part of the heat dissipation structure 3 located outside the housing 1, so that the other part of the heat dissipation structure 3 located outside the housing 1 can exchange heat with the external environment. The heat dissipation structure 3 has a simple structure and is easy to assemble, which is conducive to reducing the manufacturing difficulty of the battery device 100 and improving the assembly efficiency of the battery device 100.

[0083] Specifically, when the battery device 100 is working, the heat generated by the battery cell 2 is transferred to the part of the heat dissipation structure 3 located in the assembly space. Since the heat dissipation structure 3 has good thermal conductivity, the heat transferred from the battery cell 2 to the heat dissipation structure 3 can spread to the entire heat dissipation structure 3 and be transferred to the environment through another part of the heat dissipation structure 3 located outside the box 1, thereby achieving the effect that the heat of the battery cell 2 can be dissipated through the heat dissipation structure 3, which is beneficial for the battery device 100 to work within an appropriate temperature range, thereby improving the safety and service life of the battery device 100.

[0084] In the above technical solution, part of the heat dissipation structure 3 is arranged inside the box body 1 to cooperate with the battery cell 2 for heat exchange, and the other part of the heat dissipation structure 3 is arranged outside the box body 1 to exchange heat with the external environment. The heat of the battery cell 2 can be transferred to the outside of the box body 1 through the heat dissipation structure 3, thereby achieving the heat dissipation effect of the battery device 100. In addition, the heat dissipation structure 3 has a simple structure and is easy to assemble, which is conducive to reducing the manufacturing difficulty of the battery device 100 and improving the assembly efficiency of the battery device 100. In addition, it can also effectively solve the problem of coolant leakage, thereby effectively improving the safety and service life of the battery device 100.

[0085] According to some embodiments of the present application, referring to Figure 3 and Figure 7 As shown, another part of the heat dissipation structure 3 is located below the box body 1 .

[0086] Among them, along the height direction of the battery device 100, another part of the heat dissipation structure 3 is located below the box body 1, and the box body 1 has an upper surface and a lower surface. Further, another part of the heat dissipation structure 3 is located below the lower surface. Such an arrangement can make the arrangement of the heat dissipation structure 3 reasonable. When the battery device 100 is assembled on the vehicle 1000, the upper surface of the box body 1 is usually assembled toward the vehicle 1000. By locating another part of the heat dissipation structure 3 below the box body 1, the other part of the heat dissipation structure 3 can be arranged away from the chassis of the vehicle 1000, thereby reducing the risk of heat from other components on the chassis (for example: engine, exhaust pipe, etc.) being transferred to the heat dissipation structure 3, thereby reducing the risk of heat dissipation failure of the battery device 100 or even explosion of the battery device 100 due to excessive temperature.

[0087] When the vehicle 1000 is traveling, airflow is generated around the portion of the heat dissipation structure 3 located below the box body 1. The heat of the heat dissipation structure 3 can be taken away by air cooling, thereby improving the heat dissipation efficiency of the heat dissipation structure 3. Furthermore, by locating another portion of the heat dissipation structure 3 below the box body 1, the risk of airflow being blocked by other components on the chassis of the vehicle 1000 can be reduced, thereby helping to improve the heat dissipation effect of the heat dissipation structure 3, helping the battery device 100 to operate within a suitable temperature range, and further improving the safety and service life of the battery device 100.

[0088] In the above technical solution, another part of the heat dissipation structure 3 is located below the box 1, so that the other part of the heat dissipation structure 3 can be set away from the chassis of the vehicle 1000, thereby reducing the risk of heat from other components on the chassis (such as: engine, exhaust pipe, etc.) being transferred to the heat dissipation structure 3, thereby reducing the risk of heat dissipation failure of the battery device 100 or even the risk of the battery device 100 exploding due to excessive temperature. It can also reduce the risk of other components on the chassis of the vehicle 1000 blocking the airflow, which is conducive to improving the heat dissipation effect of the heat dissipation structure 3, and is conducive to the battery device 100 working within a suitable temperature range, thereby further improving the safety and service life of the battery device 100.

[0089] According to some embodiments of the present application, referring to Figure 7 As shown, the heat dissipation structure 3 and the box body 1 are integrally formed.

[0090] The heat dissipation structure 3 and the housing 1 are integrally formed, that is, the heat dissipation structure 3 and the housing 1 are constructed as an integrally formed part. As some embodiments of the present application, the heat dissipation structure 3 and the housing 1 are integrally injection molded. The integrally formed part has good structural strength. By integrally forming the heat dissipation structure 3 and the housing 1, the connection reliability of the heat dissipation structure 3 and the housing 1 can be improved, and the probability of fracture at the connection between the heat dissipation structure 3 and the housing 1 can be reduced, thereby improving the structural reliability of the battery device 100.

[0091] Furthermore, by constructing the heat dissipation structure 3 and the box body 1 as an integrally formed part, the production molds and production processes in the production process of the battery device 100 can be reduced, thereby reducing the production cost of the battery device 100 and facilitating improving the production efficiency of the battery device 100.

[0092] In the above technical solution, the heat dissipation structure 3 and the housing 1 are integrally formed, which can improve the connection reliability between the heat dissipation structure 3 and the housing 1, and reduce the probability of fracture at the connection between the heat dissipation structure 3 and the housing 1, thereby improving the structural reliability of the battery device 100, and can also reduce the production molds and production processes in the production process of the battery device 100, thereby reducing the production cost of the battery device 100, and is also conducive to improving the production efficiency of the battery device 100.

[0093] According to some embodiments of the present application, referring to Figure 2 As shown, the heat dissipation structure 3 and the battery cell 2 are in contact with each other.

[0094] Among them, the abutment between the heat dissipation structure 3 and the battery cell 2 can reduce the heat transfer path of the heat dissipation structure 3 and the battery cell 2, thereby reducing the thermal resistance between the heat dissipation structure 3 and the battery cell 2, which is beneficial for the heat generated by the battery cell 2 to be quickly transferred to the heat dissipation structure 3, thereby improving the heat exchange efficiency between the heat dissipation structure 3 and the battery cell 2, reducing the risk of heat accumulation in the battery cell 2 due to slow heat exchange efficiency, and further reducing the risk of damage to the battery cell 2 due to continuous increase in the temperature of the battery cell 2, which is beneficial for improving the service life of the battery cell 2.

[0095] In the above technical solution, the heat dissipation structure 3 and the battery cell 2 are abutted, which can reduce the heat transfer path of the heat dissipation structure 3 and the battery cell 2, thereby reducing the thermal resistance between the heat dissipation structure 3 and the battery cell 2, which is beneficial for the heat generated by the battery cell 2 to be quickly transferred to the heat dissipation structure 3, thereby improving the heat exchange efficiency of the heat dissipation structure 3 and the battery cell 2, reducing the risk of heat accumulation in the battery cell 2 due to slow heat exchange efficiency, and further reducing the risk of damage to the battery cell 2 due to continuous increase in the temperature of the battery cell 2, which is beneficial for improving the service life of the battery cell 2.

[0096] According to some embodiments of the present application, referring to Figure 2 As shown, the battery cell 2 has a first side wall 21 and a second side wall 22 adjacent to each other, the area of ​​the first side wall 21 is larger than the area of ​​the second side wall 22 , and the heat dissipation structure 3 abuts against the first side wall 21 .

[0097] The battery cell 2 may have two first side walls 21 and two second side walls 22, the two first side walls 21 are opposite and spaced apart, the two second side walls 22 are opposite and spaced apart, the area of ​​the first side wall 21 is greater than the area of ​​the second side wall 22, the first side wall 21 is the large surface of the battery cell 2, and the second side wall 22 is the narrow surface of the battery cell 2. The heat dissipation structure 3 abuts against the first side wall 21 of the battery cell 2, which can increase the contact area between the heat dissipation structure 3 and the battery cell 2, so that the heat of the battery cell 2 is evenly transferred to the heat dissipation structure 3, thereby reducing the temperature difference at different positions of the battery cell 2, reducing the risk of local overheating of the battery cell 2, and further improving the temperature uniformity of the battery device 100. By abutting the heat dissipation structure 3 against the first side wall 21 of the battery cell 2 to increase the contact area between the heat dissipation structure 3 and the battery cell 2, the heat exchange efficiency between the heat dissipation structure 3 and the battery cell 2 can be further improved, the risk of heat accumulation in the battery cell 2 due to slow heat exchange efficiency can be reduced, and the risk of damage to the battery cell 2 due to continuous temperature increase of the battery cell 2 can be reduced, which is conducive to further improving the service life of the battery cell 2. Furthermore, the heat dissipation structure 3 can effectively support the battery cell 2 and improve the position stability of the battery cell 2 .

[0098] In the above technical solution, the heat dissipation structure 3 abuts against the first side wall 21 of the battery cell 2, which can increase the contact area between the heat dissipation structure 3 and the battery cell 2, so that the heat of the battery cell 2 is evenly transferred to the heat dissipation structure 3, thereby reducing the temperature difference between different positions of the battery cell 2, reducing the risk of local overheating of the battery cell 2, and thus improving the temperature uniformity of the battery device 100. It can also further improve the heat exchange efficiency of the heat dissipation structure 3 and the battery cell 2, reduce the risk of heat accumulation in the battery cell 2 due to slow heat exchange efficiency, and thus reduce the risk of damage to the battery cell 2 due to continuous temperature increase of the battery cell 2, which is conducive to further improving the service life of the battery cell 2. In addition, the heat dissipation structure 3 can effectively support the battery cell 2 and improve the stability of the position of the battery cell 2.

[0099] According to some embodiments of the present application, referring to Figure 2 As shown, the heat dissipation structure 3 is a metal part.

[0100] Among them, as some embodiments of the present application, the heat dissipation structure 3 can be constructed as a metal part made of copper. As some embodiments of the present application, the heat dissipation structure 3 can be constructed as a metal part made of stainless steel. By constructing the heat dissipation structure 3 as a metal part, the heat dissipation structure 3 can have a higher thermal conductivity, which is beneficial for the heat of the battery cell 2 to be quickly transferred to the heat dissipation structure 3, and quickly spread to the entire heat dissipation structure 3, thereby improving the heat exchange efficiency between the battery cell 2 and the heat dissipation structure 3. Furthermore, the metal parts have good processing performance, which is beneficial for the heat dissipation structure 3 to be processed into a shape that is compatible with the battery cell 2 according to the shape and arrangement of the battery cell 2, so that the heat dissipation structure 3 can better meet the heat dissipation requirements of the battery device 100. In addition, the support strength of the heat dissipation structure 3 is improved, and the position stability of the battery cell 2 is further improved.

[0101] In the above technical solution, the heat dissipation structure 3 is a metal part, which can make the heat dissipation structure 3 have a higher thermal conductivity, which is conducive to the rapid transfer of heat from the battery cell 2 to the part of the heat dissipation structure 3 located in the box 1, and quickly spread to the entire heat dissipation structure 3, thereby improving the heat exchange efficiency between the battery cell 2 and the heat dissipation structure 3. It is also conducive to the heat dissipation structure 3 being processed into a shape that is compatible with the battery cell 2 according to the shape and arrangement of the battery cell 2, so that the heat dissipation structure 3 can better meet the heat dissipation requirements of the battery device 100. In addition, the support strength of the heat dissipation structure 3 is improved, and the stability of the position of the battery cell 2 is further improved.

[0102] According to some embodiments of the present application, referring to Figure 4 As shown, the heat dissipation structure 3 is a plate-shaped structure.

[0103] Among them, the heat dissipation structure 3 is constructed as a plate-like structure, which can increase the surface area of ​​the heat dissipation structure 3, which is conducive to improving the heat exchange efficiency between the heat dissipation structure 3 and the battery cell 2 and the heat dissipation efficiency of the heat dissipation structure 3 itself, thereby further improving the heat dissipation effect of the battery device 100. By constructing the heat dissipation structure 3 as a plate-like structure, the thickness of the heat dissipation structure 3 can also be made smaller, which is conducive to the heat dissipation structure 3 being smoothly assembled in the gap between two adjacent battery cells 2. Furthermore, the thickness of the heat dissipation structure 3 can be adjusted according to the distance between the battery cells 2 of different battery devices 100, so that the heat dissipation structure 3 can be adapted to different battery devices 100, thereby improving the versatility of the heat dissipation structure 3.

[0104] In the above technical solution, the heat dissipation structure 3 is a plate-like structure, which can increase the surface area of ​​the heat dissipation structure 3, which is conducive to improving the heat exchange efficiency between the heat dissipation structure 3 and the battery cell 2 and the heat dissipation efficiency of the heat dissipation structure 3 itself, thereby further improving the heat dissipation effect of the battery device 100. The thickness of the heat dissipation structure 3 can also be made smaller, which is conducive to the heat dissipation structure 3 being smoothly assembled in the gap between two adjacent battery cells 2. Furthermore, the thickness of the heat dissipation structure 3 can be adjusted according to the distance between the battery cells 2 of different battery devices 100, so that the heat dissipation structure 3 can be adapted to different battery devices 100, thereby improving the versatility of the heat dissipation structure 3.

[0105] According to some embodiments of the present application, the thickness of the heat dissipation structure 3 is greater than or equal to 1 mm and less than or equal to 3 mm. The thickness of the heat dissipation structure 3 can be set to values ​​such as 1 mm, 1.5 mm, 2 mm, and 3 mm. Such a setting enables the heat dissipation structure 3 to reliably support the battery cell 2. On the basis of the heat dissipation structure 3 meeting the structural strength, it is beneficial to reduce the occupied space of the heat dissipation structure 3, so that there is more space in the box 1 for assembling the battery cell 2, which is beneficial to improve the energy density of the battery device 100, and is also beneficial to the conduction of heat on the heat dissipation structure 3, thereby improving the heat dissipation efficiency.

[0106] According to some embodiments of the present application, referring to Figure 2 , Figure 6 and Figure 7 As shown, the box body 1 defines an installation cavity 11 (ie, the assembly space in the above embodiment), the battery cell 2 is disposed in the installation cavity 11 , and the heat dissipation structure 3 is disposed through the bottom wall of the installation cavity 11 .

[0107] The housing 1 defines an installation cavity 11, which can provide an assembly position for the battery cell 2. By placing the battery cell 2 in the installation cavity 11, the battery cell 2 can work stably in the installation cavity 11, which is beneficial to reducing the impact of the external environment on the battery cell 2, thereby improving the working stability of the battery cell 2 and extending the service life of the battery cell 2. The heat dissipation structure 3 can be penetrated through the bottom wall of the installation cavity 11, so that part of the heat dissipation structure 3 is located in the housing 1 and cooperates with the battery cell 2 in heat exchange, and the other part of the heat dissipation structure 3 is located outside the housing 1 and exchanges heat with the external environment.

[0108] Specifically, the heat generated by the battery cell 2 is transferred to the portion of the heat dissipation structure 3 located within the installation cavity 11. Since the heat dissipation structure 3 has good thermal conductivity, the heat transferred from the battery cell 2 to the heat dissipation structure 3 can spread to the entire heat dissipation structure 3, and be transferred to the environment through another portion of the heat dissipation structure 3 located outside the installation cavity 11, thereby achieving the effect that the heat of the battery cell 2 can be dissipated through the heat dissipation structure 3, which is beneficial for the battery device 100 to operate within a suitable temperature range, thereby improving the safety and service life of the battery device 100.

[0109] In the above technical solution, the battery cell 2 is arranged in the installation cavity 11, so that the battery cell 2 can work stably in the installation cavity 11, which is conducive to reducing the impact of the external environment on the battery cell 2, thereby improving the working stability of the battery cell 2 and extending the service life of the battery cell 2. The heat dissipation structure 3 is penetrated through the cavity bottom wall of the installation cavity 11, so that part of the heat dissipation structure 3 is located in the box body 1 and the other part is located outside the box body 1, so that the heat generated by the battery cell 2 can be transferred to the external environment, thereby achieving the effect of heat dissipation of the heat of the battery cell 2 through the heat dissipation structure 3, which is conducive to the battery device 100 working within a suitable temperature range, thereby improving the safety and service life of the battery device 100.

[0110] According to some embodiments of the present application, referring to Figure 2 and Figure 4 As shown, the box body 1 includes an upper box body (not shown in the figure) and a lower box body 12, the upper box body and the lower box body 12 are connected to define a mounting cavity 11, and the box body bottom wall of the lower box body 12 is configured as a cavity bottom wall.

[0111] Among them, the upper box body and the lower box body 12 can cover each other. As some embodiments of the present application, the upper box body and the lower box body 12 can be connected by bolts. As some embodiments of the present application, the upper box body and the lower box body 12 can be connected by a snap-on method. By allowing the upper box body and the lower box body 12 to cover each other, the upper box body and the lower box body 12 can jointly define the installation cavity 11. As some embodiments of the present application, the upper box body and the lower box body 12 can both be constructed as a hollow structure with one side open, and the open side of the upper box body covers the open side of the lower box body 12, so that the upper box body and the lower box body 12 jointly define the installation cavity 11. As some embodiments of the present application, the lower box body 12 can be a hollow structure with one side open, and the upper box body can be a plate-like structure, and the upper box body covers the open side of the lower box body 12, so that the upper box body and the lower box body 12 jointly define the installation cavity 11. As some embodiments of the present application, the box body 1 formed by the upper box body and the lower box body 12 can be in various shapes, such as: a cube, a rectangular parallelepiped, etc.

[0112] As some embodiments of the present application, when the battery device 100 is assembled, the upper box body and the lower box body 12 are separated so that one side of the lower box body 12 is open, and the battery cell 2 is assembled to the lower box body 12 through the open side of the lower box body 12, and the upper box body is covered on the open side of the lower box body 12, so that the battery cell 2 can be smoothly assembled in the installation cavity 11. The bottom wall of the lower box body 12 is configured as a cavity bottom wall, and the heat dissipation structure 3 is penetrated through the bottom wall of the box body, so that another part of the heat dissipation structure 3 can be located outside the box body 1, so that the other part of the heat dissipation structure 3 located outside the box body 1 can exchange heat with the external environment, which is conducive to the heat of the battery cell 2 being transferred to the outside of the box body 1 through the heat dissipation structure 3, thereby achieving the heat dissipation effect of the battery device 100.

[0113] In the above technical solution, the box body 1 includes an upper box body and a lower box body 12, which are connected to define an installation cavity 11. The battery cell 2 is assembled to the lower box body 12 through the open side of the lower box body 12, and the upper box body is covered on the open side of the lower box body 12, so that the battery cell 2 can be smoothly assembled to the installation cavity 11. The box body bottom wall of the lower box body 12 is constructed as a cavity bottom wall, and the heat dissipation structure 3 is penetrated through the cavity bottom wall, so that another part of the heat dissipation structure 3 can be located outside the box body 1, so that the other part of the heat dissipation structure 3 located outside the box body 1 can exchange heat with the external environment, which is conducive to the heat of the battery cell 2 being transferred to the outside of the box body 1 through the heat dissipation structure 3, thereby achieving the heat dissipation effect of the battery device 100.

[0114] According to some embodiments of the present application, an outer surface of the cavity bottom wall is formed with a mounting groove 13 recessed toward the cavity bottom wall, another portion of the heat dissipation structure 3 is located in the mounting groove 13, and a height dimension of the other portion of the heat dissipation structure 3 along the height direction of the battery device 100 is less than or equal to a depth dimension of the mounting groove 13.

[0115] Among them, the outer surface of the cavity bottom wall is formed with a mounting groove 13 recessed toward the cavity bottom wall, that is, the outer surface of the box bottom wall of the lower box body 12 is formed with a mounting groove 13 recessed toward the box bottom wall, and the part of the heat dissipation structure 3 located outside the box body 1 is located in the mounting groove 13. Along the height direction of the battery device 100, the height dimension of the part of the heat dissipation structure 3 located outside the box body 1 is less than or equal to the depth dimension of the mounting groove 13. This application takes the example that the height dimension of the part of the heat dissipation structure 3 located outside the box body 1 is equal to the depth dimension of the mounting groove 13 for explanation.

[0116] In the above technical solution, by ensuring that the height dimension of another part of the heat dissipation structure 3 along the height direction of the battery device 100 is less than or equal to the depth dimension of the mounting groove 13, while ensuring that the heat dissipation structure 3 does not protrude from the lowermost surface of the lower box body 12, it is beneficial to increase the setting area of ​​the heat dissipation structure 3 outside the box body 1, thereby further improving the heat dissipation efficiency.

[0117] According to some embodiments of the present application, referring to Figure 4-Figure 6 As shown, the heat dissipation structure 3 extends along a first direction, and the first direction is perpendicular to the height direction of the battery device 100 .

[0118] The heat dissipation structure 3 extends along a first direction, namely Figure 2 The first direction is perpendicular to the height direction of the battery device 100, that is, the X direction is perpendicular to the Z direction. When the battery cell 2 extends along the first direction, the contact area between the heat dissipation structure 3 and the battery cell 2 can be increased by extending the heat dissipation structure 3 along the first direction, so that the entire side wall of the battery cell 2 exchanges heat with the corresponding heat dissipation structure 3.

[0119] When multiple battery cells 2 are arranged along a first direction, by extending the heat dissipation structure 3 along the first direction, the heat dissipation structure 3 can be made to abut against multiple battery cells 2 along the first direction, so that multiple battery cells 2 can exchange heat with the same heat dissipation structure 3, which is beneficial for the battery cells 2 to reliably dissipate heat through the heat dissipation structure 3, reducing the risk of local overheating of a battery cell 2 due to the lack of abutment with the corresponding heat dissipation structure 3, or the risk of overheating of a battery cell 2 due to the lack of abutment between any one of the multiple battery cells 2 and the corresponding heat dissipation structure 3, thereby making the temperatures of different parts of a battery cell 2 and multiple battery cells 2 consistent or approximately consistent, which is beneficial to improving the temperature uniformity of the battery device 100.

[0120] In the above technical scheme, the heat dissipation structure 3 extends along the first direction, so that the battery cell 2 can reliably dissipate heat through the heat dissipation structure 3, thereby reducing the risk of local overheating of a battery cell 2 due to the lack of abutment with the corresponding heat dissipation structure 3, or the risk of overheating of a battery cell 2 due to the lack of abutment with the corresponding heat dissipation structure 3 by any one of the multiple battery cells 2. As a result, the temperatures of different parts of a battery cell 2 and multiple battery cells 2 are consistent or approximately consistent, which is beneficial to improving the temperature uniformity of the battery device 100.

[0121] According to some embodiments of the present application, referring to Figure 4-Figure 6 As shown, there are multiple heat dissipation structures 3, and the multiple heat dissipation structures 3 are arranged in sequence along the second direction, and two adjacent heat dissipation structures 3 are spaced apart to divide the installation cavity 11 into multiple installation spaces 111, and the installation spaces 111 are installed with battery cells 2, and the first direction, the second direction and the height direction of the battery device 100 are perpendicular to each other.

[0122] There may be multiple heat dissipation structures 3, for example, there may be fifteen, twenty-eight, or thirty heat dissipation structures 3. It should be noted that the number of heat dissipation structures 3 may be set according to the arrangement of the battery cells 2 in the battery device 100. The multiple heat dissipation structures 3 are arranged in sequence along the second direction. Figure 2 In the Y direction, the first direction, the second direction and the height direction of the battery device 100 are perpendicular to each other, that is, the X direction, the Y direction and the Z direction are perpendicular to each other.

[0123] Two adjacent heat dissipation structures 3 are spaced apart so that the plurality of heat dissipation structures 3 divide the installation cavity 11 into a plurality of installation spaces 111, and the plurality of installation spaces 111 are arranged along the second direction, and a corresponding number of battery cells 2 are installed in the installation spaces 111. As some embodiments of the present application, along the second direction, a row of a plurality of battery cells 2 arranged along the first direction can be assembled in each installation space 111, so that both sides of any battery cell 2 along the second direction are abutted by the heat dissipation structure 3, so that any battery cell 2 can reliably exchange heat with the heat dissipation structure 3. As some embodiments of the present application, along the second direction, the installation space 111 between two heat dissipation structures 3 can be equipped with two rows of battery cells 2 arranged along the first direction, so that both sides of any battery cell 2 along the second direction are abutted by the heat dissipation structure 3, so that any battery cell 2 can reliably exchange heat with the heat dissipation structure 3, reduce the risk of overheating of any battery cell 2 among the plurality of battery cells 2, and then make the temperature of the plurality of battery cells 2 consistent or substantially consistent, which is conducive to further improving the temperature uniformity of the battery device 100.

[0124] In the above technical solution, the heat dissipation structures 3 are arranged in sequence along the second direction, and two adjacent heat dissipation structures 3 are spaced apart to divide the installation cavity 11 into a plurality of installation spaces 111. Battery cells 2 are installed in the installation spaces 111, so that at least one side of any battery cell 2 along the second direction can be abutted by the heat dissipation structure 3, so that any battery cell 2 can reliably exchange heat with the heat dissipation structure 3, reducing the risk of overheating of any battery cell 2 among the multiple battery cells 2, and thereby making the temperatures of the multiple battery cells 2 consistent or approximately consistent, which is beneficial to further improve the temperature uniformity of the battery device 100.

[0125] According to some embodiments of the present application, referring to Figure 5-Figure 7 As shown, a plurality of heat dissipation structures 3 are parallel to each other.

[0126] Among them, when the heat dissipation structure 3 cooperates with the battery cell 2 in heat exchange, the multiple heat dissipation structures 3 are arranged in parallel to each other, which can increase the contact area between the heat dissipation structure 3 and the battery cell 2, which is conducive to the close contact between the heat dissipation structure 3 and the battery cell 2, thereby reducing the thermal resistance between the heat dissipation structure 3 and the battery cell 2, so that the heat of the battery cell 2 can be transferred to the heat dissipation structure 3 more quickly, and the parallel arrangement of the heat dissipation structure 3 is conducive to achieving the effect of uniform heat dissipation at different positions of the battery device 100, reducing the risk of local overheating of the battery device 100, thereby extending the service life of the battery device 100. Furthermore, the multiple heat dissipation structures 3 are arranged in parallel to each other, so that the heat dissipation structure 3 can be used as a reinforcement structure of the box body 1, reducing the risk of deformation or even cracking of the box body 1, thereby improving the reliability of the battery device 100.

[0127] In the above technical solution, multiple heat dissipation structures 3 are parallel to each other, which can increase the contact area between the heat dissipation structure 3 and the battery cell 2, which is conducive to the close contact between the heat dissipation structure 3 and the battery cell 2, thereby reducing the thermal resistance between the heat dissipation structure 3 and the battery cell 2, so that the heat of the battery cell 2 can be transferred to the heat dissipation structure 3 more quickly, and it is also conducive to achieving the effect of uniform heat dissipation at different positions of the battery device 100, reducing the risk of local overheating of the battery device 100, thereby extending the service life of the battery device 100. In addition, the heat dissipation structure 3 can be used as a reinforcement structure of the box body 1, reducing the risk of deformation or even cracking of the box body 1, thereby improving the reliability of the battery device 100.

[0128] According to some embodiments of the present application, the present application further provides an electrical device, comprising the above-mentioned battery device 100.

[0129] As some embodiments of the present application, the electrical device may be a vehicle 1000 .

[0130] The power-consuming device may be any of the aforementioned devices or systems using the battery device 100 .

[0131] According to some embodiments of the present application, the present application further provides a case 1 of a battery device 100, comprising: the case 1 defines an installation cavity 11 for installing a battery cell 2, the case 1 is fixedly provided with a heat dissipation structure 3, a portion of the heat dissipation structure 3 is located in the installation cavity 11, and another portion of the heat dissipation structure 3 is located outside the case 1. By assembling the battery cell 2 in the installation cavity 11, multiple battery cells 2 can be stably operated in the installation cavity 11, which is beneficial to improving the working stability of the battery cell 2. As some embodiments of the present application, the heat dissipation structure 3 and the case 1 can be connected by bolts so that the case 1 is fixedly provided with the heat dissipation structure 3. As some embodiments of the present application, the heat dissipation structure 3 and the case 1 can be connected by snapping so that the case 1 is fixedly provided with the heat dissipation structure 3. However, the present application is not limited thereto, and the heat dissipation structure 3 and the case 1 can also be fixedly connected by other means, as long as the heat dissipation structure 3 is fixedly provided on the case 1.

[0132] Part of the heat dissipation structure 3 is located in the mounting cavity 11 of the housing 1, and the part of the heat dissipation structure 3 located in the mounting cavity 11 can cooperate with the battery cell 2 in heat exchange, so that the heat of the battery cell 2 can be transferred to the heat dissipation structure 3. Another part of the heat dissipation structure 3 is located outside the housing 1, and the other part of the heat dissipation structure 3 refers to the part of the heat dissipation structure 3 located outside the housing 1, so that the other part of the heat dissipation structure 3 located outside the housing 1 can exchange heat with the external environment, thereby achieving the effect that the heat of the battery cell 2 can be dissipated through the heat dissipation structure 3.

[0133] In the above technical solution, the box body 1 defines a mounting cavity 11 for mounting the battery cells 2 , so that the multiple battery cells 2 can work stably in the mounting cavity 11 , which is beneficial to improving the working stability of the battery cells 2 .

[0134] The box body 1 is fixedly provided with a heat dissipation structure 3, part of the heat dissipation structure 3 is located in the installation cavity 11, and the other part of the heat dissipation structure 3 is located outside the box body 1. The part of the heat dissipation structure 3 located in the installation cavity 11 can cooperate with the battery cell 2 in heat exchange, so that the heat of the battery cell 2 can be transferred to the heat dissipation structure 3 and spread to the entire heat dissipation structure 3, and then heat is exchanged with the external environment through the other part of the heat dissipation structure 3 located outside the box body 1, thereby achieving the effect that the heat of the battery cell 2 can be dissipated through the heat dissipation structure 3.

[0135] According to some embodiments of the present application, referring to Figure 4 As shown, the battery device 100 includes: a box body 1 and a battery cell 2, and the battery cell 2 is arranged in the box body 1 so that multiple battery cells 2 can work stably in the box body 1. The heat dissipation structure 3 is fixed to the box body 1, and part of the heat dissipation structure 3 is located in the box body 1 and cooperates with the battery cell 2 for heat exchange, and another part of the heat dissipation structure 3 is located outside the box body 1 and another part of the heat dissipation structure 3 is located below the box body 1, so that the other part of the heat dissipation structure 3 can be arranged away from the chassis of the vehicle 1000, thereby reducing the risk of heat transfer from other components on the chassis (such as: engine, exhaust pipe, etc.) to the heat dissipation structure 3, thereby reducing the risk of heat dissipation failure of the battery device 100 or even the risk of explosion due to excessive temperature of the battery device 100.

[0136] The heat dissipation structure 3 and the housing 1 are integrally formed, which improves the connection reliability of the heat dissipation structure 3 and the housing 1, and can reduce the probability of fracture at the connection between the heat dissipation structure 3 and the housing 1, thereby improving the structural reliability of the battery device 100, and can also reduce the production molds and production processes in the production process of the battery device 100, thereby reducing the production cost of the battery device 100, and is also conducive to improving the production efficiency of the battery device 100. The heat dissipation structure 3 and the battery cell 2 are abutted, and further, the heat dissipation structure 3 and the side wall of the battery cell 2 are abutted, reducing the heat transfer path of the heat dissipation structure 3 and the battery cell 2, thereby reducing the thermal resistance between the heat dissipation structure 3 and the battery cell 2, which is conducive to the heat generated by the battery cell 2 can be quickly transferred to the heat dissipation structure 3, improving the heat exchange efficiency of the heat dissipation structure 3 and the battery cell 2, reducing the risk of heat accumulation in the battery cell 2 due to slow heat exchange efficiency, and then reducing the risk of damage to the battery cell 2 due to the continuous increase in the temperature of the battery cell 2, which is conducive to improving the service life of the battery cell 2.

[0137] The heat dissipation structure 3 is a metal part and the heat dissipation structure 3 is a plate-like structure, so that the thickness of the heat dissipation structure 3 can be relatively small, which is conducive to the heat dissipation structure 3 being smoothly assembled in the gap between two adjacent battery cells 2. Furthermore, the thickness of the heat dissipation structure 3 can be adjusted according to the distance between the battery cells 2 of different battery devices 100, so that the heat dissipation structure 3 can be adapted to different battery devices 100, thereby improving the versatility of the heat dissipation structure 3. The heat dissipation structure 3 is a metal part, which can make the heat dissipation structure 3 have a higher thermal conductivity, which is conducive to the heat of the battery cell 2 being quickly transferred to the part of the heat dissipation structure 3 located in the box 1, and quickly spread to the entire heat dissipation structure 3, thereby improving the heat exchange efficiency between the battery cell 2 and the heat dissipation structure 3. It is also conducive to the heat dissipation structure 3 being processed into a shape adapted to the battery cell 2 according to the shape and arrangement of the battery cell 2, so that the heat dissipation structure 3 can better meet the heat dissipation requirements of the battery device 100.

[0138] The box body 1 defines an installation cavity 11, the battery cell 2 is arranged in the installation cavity 11, and the heat dissipation structure 3 is arranged through the cavity bottom wall of the installation cavity 11. The box body 1 includes an upper box body and a lower box body 12, the upper box body and the lower box body 12 are connected to define the installation cavity 11, and the bottom wall of the box body 1 of the lower box body 12 is configured as a cavity bottom wall. By assembling the battery cell 2 to the lower box body 12 through the open side of the lower box body 12, and closing the upper box body on the open side of the lower box body 12, the battery cell 2 can be smoothly assembled in the installation cavity 11. The bottom wall of the box body 1 of the lower box body 12 is configured as a cavity bottom wall, and by the heat dissipation structure 3 being arranged through the cavity bottom wall, another part of the heat dissipation structure 3 can be located outside the box body 1, so that the other part of the heat dissipation structure 3 located outside the box body 1 can exchange heat with the external environment, which is conducive to the heat of the battery cell 2 being transferred to the outside of the box body 1 through the heat dissipation structure 3, thereby achieving the heat dissipation effect of the battery device 100.

[0139] The heat dissipation structure 3 extends along the first direction, and the first direction is perpendicular to the height direction of the battery device 100. There are multiple heat dissipation structures 3, and the multiple heat dissipation structures 3 are arranged in sequence along the second direction, and two adjacent heat dissipation structures 3 are spaced apart to divide the installation cavity 11 into multiple installation spaces 111, and the installation spaces 111 are installed with battery cells 2. The first direction, the second direction and the height direction of the battery device 100 are perpendicular to each other. The multiple heat dissipation structures 3 are parallel to each other, so that the battery cells 2 can reliably dissipate heat through the heat dissipation structures 3, reducing the risk of local overheating of a battery cell 2 due to the lack of contact with the corresponding heat dissipation structure 3, or the risk of overheating of a battery cell 2 due to the lack of contact with the corresponding heat dissipation structure 3 by any one of the multiple battery cells 2, thereby making the temperatures of different parts of a battery cell 2 and multiple battery cells 2 consistent or approximately consistent, which is conducive to improving the temperature uniformity of the battery device 100.

[0140] In the above technical solution, part of the heat dissipation structure 3 is arranged inside the box body 1 to cooperate with the battery cell 2 for heat exchange, and the other part of the heat dissipation structure 3 is arranged outside the box body 1 to exchange heat with the external environment. The heat of the battery cell 2 can be transferred to the outside of the box body 1 through the heat dissipation structure 3, thereby achieving the heat dissipation effect of the battery device 100. In addition, the heat dissipation structure 3 has a simple structure and is easy to assemble, which is conducive to reducing the manufacturing difficulty of the battery device 100 and improving the assembly efficiency of the battery device 100. In addition, it can also effectively solve the problem of coolant leakage, thereby effectively improving the safety and service life of the battery device 100.

[0141] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. If there is no special description, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution. If there is no special description, all technical features and optional technical features of the present application can be combined with each other to form a new technical solution.

[0142] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A box body and a battery cell, wherein the battery cell is arranged in the box body; The heat dissipation structure is fixed to the box body, part of the heat dissipation structure is located in the box body and cooperates with the battery cell for heat exchange, and another part of the heat dissipation structure is located outside the box body, and the heat dissipation structure and the box body are integrally formed.

2. The battery device according to claim 1, characterized in that: The other part of the heat dissipation structure is located below the box body.

3. The battery device according to claim 1, characterized in that: The heat dissipation structure abuts against the battery cell.

4. The battery device according to claim 3, characterized in that: The battery cell has a first side wall and a second side wall that are adjacent to each other. The area of ​​the first side wall is greater than the area of ​​the second side wall. The heat dissipation structure abuts against the first side wall.

5. The battery device according to claim 1, characterized in that: The heat dissipation structure is a metal part.

6. The battery device according to claim 1, characterized in that: The heat dissipation structure is a plate-shaped structure.

7. The battery device according to claim 1, characterized in that: The thickness of the heat dissipation structure is greater than or equal to 1 mm and less than or equal to 3 mm.

8. The battery device according to any one of claims 1 to 7, characterized in that: The box body defines an installation cavity, the battery cell is arranged in the installation cavity, and the heat dissipation structure is arranged through the bottom wall of the installation cavity.

9. The battery device according to claim 8, characterized in that: The box body comprises an upper box body and a lower box body, the upper box body and the lower box body are connected to define the installation cavity, and the box body bottom wall of the lower box body is configured as the cavity bottom wall.

10. The battery device according to claim 8, characterized in that: An outer surface of the cavity bottom wall is formed with a mounting groove recessed toward the cavity bottom wall, the other part of the heat dissipation structure is located in the mounting groove, and the height dimension of the other part of the heat dissipation structure along the height direction of the battery device is less than or equal to the depth dimension of the mounting groove.

11. The battery device according to claim 8, characterized in that: The heat dissipation structure extends along a first direction, and the first direction is perpendicular to a height direction of the battery device.

12. The battery device according to claim 11, characterized in that: There are multiple heat dissipation structures, which are arranged in sequence along the second direction, and two adjacent heat dissipation structures are spaced apart to divide the installation cavity into multiple installation spaces, and the battery cells are installed in the installation spaces. The first direction, the second direction and the height direction of the battery device are perpendicular to each other.

13. The battery device according to claim 12, characterized in that: The plurality of heat dissipation structures are parallel to each other.

14. An electrical device, characterized in that: Comprising a battery device according to any one of claims 1-13.

15. A box for a battery device, characterized in that: include: The box defines an installation cavity for installing a battery cell. The box is provided with a heat dissipation structure. Part of the heat dissipation structure is located in the installation cavity, and another part of the heat dissipation structure is located outside the box. The heat dissipation structure and the box are integrally formed.

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