Battery device and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery device and electric equipment. The battery device comprises a box body, single batteries, a heat exchange assembly and expansion glue, a containing cavity is formed in the box body, an opening communicated with the containing cavity is formed in one end of the box body, a supporting plate is arranged at the other end of the box body, the single batteries are arranged in the containing cavity, and the heat exchange assembly is arranged between the supporting plate and the single batteries. At least part of the heat exchange assembly and the supporting plate are arranged at intervals, an interval space is formed between the heat exchange assembly and the supporting plate, and the expansion glue is arranged in the interval space and connected with the heat exchange assembly and the supporting plate. According to the battery device provided by the invention, after the supporting plate is deformed due to external impact, the deformed supporting plate cannot directly extrude the heat exchange assembly due to the existence of the expansion glue, so that the damage to the heat exchange assembly is reduced.

Description

Technical Field

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

[0002] Power batteries are the core components of electric vehicles. The quality and efficiency of power batteries are directly related to and affect the quality and performance of electric vehicles. The battery pack thermal management system is the core component of the battery system. Its main function is to maintain the battery system in a suitable temperature range during operation, ensuring the performance, thermal safety and cycle life of the battery system.

[0003] The battery pack thermal management system includes a heat exchange component, which is configured to exchange heat with the battery cells to adjust the temperature of the battery cells. The current heat exchange component is generally located at the bottom of the battery box. When the bottom of the battery box is hit, it is easy to cause the heat exchange component to deform and damage, thereby affecting the heat exchange effect on the battery cells. Utility Model Content

[0004] In view of the defects of the prior art, the purpose of the present application is to provide a battery device and an electrical equipment, which can effectively solve the problem of deformation and damage of the heat exchange component when the bottom of the battery box is hit.

[0005] The first aspect of the present application provides a battery device, comprising:

[0006] A box body, wherein a receiving cavity is formed inside the box body, an opening communicating with the receiving cavity is formed at one end of the box body, and a support plate is provided at the other end of the box body;

[0007] A battery cell, wherein the battery cell is arranged in the accommodating cavity;

[0008] A heat exchange component is disposed between the support plate and the battery cell and is configured to be able to exchange heat with the battery cell, at least a portion of the heat exchange component is spaced apart from the support plate, and a spacing space is formed between the two;

[0009] The expansion glue is arranged in the interval space and is respectively connected with the heat exchange component and the support plate.

[0010] According to the battery device of the present application, the heat exchange assembly and the support plate are connected by expansion glue, and the heat exchange assembly is fixed in the accommodating cavity, so that the heat exchange assembly is arranged close to the battery cell, and the heat exchange efficiency between the heat exchange assembly and the battery cell is improved. At the same time, because the expansion glue has support after curing, when the support plate is deformed by external impact, due to the presence of the expansion glue, the deformed support plate cannot directly squeeze the heat exchange assembly, thereby reducing the damage to the heat exchange assembly. When the support plate is arranged at the bottom of the box, the damage to the heat exchange assembly can be reduced when the bottom of the box is hit.

[0011] In some embodiments of the application, the expansion adhesive comprises epoxy resin expansion adhesive.

[0012] The epoxy resin expansion adhesive has good adhesion and is flame retardant, which can reduce the occurrence of combustion when the internal heat of the battery device increases uncontrollably.

[0013] In some embodiments of the application, there are multiple expansion adhesives, and the multiple expansion adhesives are arranged in the spacing space at intervals.

[0014] By arranging a plurality of expansion adhesives at intervals in the spacing space, the heat exchange plate and the support plate can be bonded and fixed at a plurality of positions, and a receiving space is formed between any two expansion adhesives to accommodate the deformed support plate, thereby reducing the possibility that the deformed support plate is squeezed by the expansion adhesive to damage the heat exchange plate.

[0015] In some embodiments of the application, the curing temperature of the expansion adhesive is greater than or equal to 150° and less than or equal to 220°.

[0016] By setting the expansion glue, the expansion glue is used to support the heat exchange component after being heated and expanded, so that the heat exchange component and the support plate are spaced apart, reducing the heat exchange component from being close to the support plate after being deformed by heat, and when the support plate is deformed by external impact, the deformed support plate cannot directly squeeze the heat exchange component, thereby reducing damage to the heat exchange component. At the same time, setting the curing temperature of the expansion glue to be greater than or equal to 150° and less than or equal to 220° can reduce the deformation of the expansion glue when the heat exchange component releases heat, thereby improving the support strength of the expansion glue.

[0017] In some embodiments of the application, a portion of the edge of the heat exchange component is spaced apart from the support plate, and an electrophoresis channel connected to the spacing space is formed between the two.

[0018] After the heat exchange component is assembled with the housing, electrophoretic liquid can be injected into the space between the heat exchange component and the support plate through the electrophoretic channel, thereby forming an electrophoretic coating on the surface of the heat exchange component and the support plate, thereby improving the corrosion resistance of the heat exchange component and the support plate.

[0019] In some embodiments of the application, the heat exchange assembly includes a heat exchange plate, and the heat exchange plate is riveted to the support plate.

[0020] Connecting the heat exchange plate and the support plate by riveting can improve the connection strength between the heat exchange plate and the support plate, and the riveting process is easy to operate.

[0021] In some embodiments of the application, the battery device further includes self-piercing rivets, and the heat exchange plate and the support plate are self-piercing riveted by the self-piercing rivets.

[0022] Riveting the heat exchange plate and the support plate with self-piercing rivets can improve the connection strength between the heat exchange plate and the support plate, and the self-piercing rivets will not pass through the heat exchange plate and the support plate at the same time, thereby reducing electrochemical corrosion of the heat exchange plate and the support plate through the self-piercing rivets.

[0023] In some embodiments of the application, a first mounting hole is provided through the support plate, and the self-piercing rivet is configured to rivet the heat exchange plate and the support plate along the direction of the heat exchange plate toward the support plate, and squeeze part of the heat exchange plate into the first mounting hole.

[0024] By setting a first mounting hole on the support plate, part of the heat exchange plate can be squeezed into the first mounting hole under the action of the self-piercing rivet, thereby improving the connection strength between the heat exchange plate and the support plate, and the self-piercing rivet will not pierce the heat exchange plate, thereby reducing the electrochemical corrosion of the heat exchange plate and the support plate through the self-piercing rivet.

[0025] In some embodiments of the application, the edge of the heat exchange plate is riveted to the support plate; and / or the portion of the heat exchange plate corresponding to the battery cell is riveted to the support plate.

[0026] The heat exchange plate can be riveted to the support plate through its edge according to installation requirements, and / or can be riveted to the support plate through the portion corresponding to the battery cell, thereby fixing the heat exchange plate to the support plate and improving the connection strength between the heat exchange plate and the support plate.

[0027] In some embodiments of the application, the heat exchange plate includes a first plate portion and a second plate portion that are connected to each other, the second plate portion is arranged on the side of the first plate portion facing the support plate, the second plate portion is provided with a first portion protruding away from the first plate portion and a second portion fitted with the first plate portion, the first portion and the first plate portion form a heat exchange channel, and the second portion is connected to the expansion glue on the surface facing the support plate.

[0028] Since the first part is protruding in a direction away from the first plate part, the expansion glue is connected to the second part. The expanded expansion glue can reduce the extrusion deformation caused to the heat exchange flow channel. At the same time, it reduces the space occupied by the expansion glue and the heat exchange plate in a direction perpendicular to the support plate after being bonded, thereby reducing the space occupied by the box in a direction perpendicular to the support plate.

[0029] In some embodiments of the application, the heat exchange assembly includes a heat exchange plate, and the battery device also includes a connecting rivet, which is riveted to the heat exchange plate and welded to the support plate.

[0030] The heat exchange plate can be connected to the support plate by connecting rivets, wherein the connecting rivets are riveted to the heat exchange plate, and the ends of the connecting rivets are welded to the support plate, thereby improving the connection strength between the heat exchange plate and the support plate. At the same time, since the connecting rivets are only welded to the support plate, rather than passing through the support plate and riveted to the support plate, no holes are formed on the surface of the support plate, thereby improving the sealing of the support plate.

[0031] In some embodiments of the application, the expansion glue is configured to have a size of 8 mm to 12 mm after expansion along the direction of the heat exchange component toward the support plate.

[0032] The size of the expansion glue after expansion along the direction of the heat exchange component toward the support plate is set to 8mm-12mm, that is, the spacing size between the support plate and part of the heat exchange component is set to 8mm-12mm, thereby increasing the spacing size between the support plate and part of the heat exchange component and reducing the extrusion damage to the heat exchange component after the support plate is deformed by impact.

[0033] In some embodiments of the application, an insulating layer is provided on the surface of the heat exchange assembly facing the battery cell.

[0034] By providing an insulating layer on the surface of the heat exchange assembly facing the battery cell, the corrosion resistance of the heat exchange assembly can be improved, and when the heat exchange assembly contacts the surface of the battery cell, the presence of the insulating layer can reduce the short circuit between the heat exchange assembly and the battery cell.

[0035] In some embodiments of the application, an impact-resistant layer is provided on the outer surface of the box.

[0036] By providing an impact-resistant layer on the outer surface of the box, deformation of the box under the action of external impact can be reduced, thereby reducing the damage to the heat exchange plate and the battery cell caused by the squeeze of the deformed box.

[0037] A second aspect of the present application provides an electrical device, comprising any of the above-mentioned battery devices.

[0038] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0040] Figure 1 is a structural schematic diagram of a vehicle provided by an embodiment of the present application;

[0041] Figure 2 is a schematic structural diagram of a battery device provided in one embodiment of the present application;

[0042] Figure 3 is a schematic structural diagram of a battery cell assembly provided in one embodiment of the present application;

[0043] Figure 4 is a schematic diagram of the exploded structure of a battery cell provided in one embodiment of the present application;

[0044] Figure 5 yes Figure 2 A schematic diagram of the structure of the battery device after removing the battery cell;

[0045] Figure 6 yes Figure 5 Axonometric view of the battery device in;

[0046] Figure 7 yes Figure 5 The structural diagram of the box in FIG.

[0047] Figure 8 yes Figure 5 AA cross-sectional structural diagram of the battery device;

[0048] Fig. 9 yes Figure 5 BB cross-sectional structural schematic diagram of the battery device;

[0049] Fig.10 yes Figure 8 Schematic diagram of the enlarged structure of part C;

[0050] Fig.11 yes Figure 5 A schematic diagram of the structure of the heat exchange component in FIG.

[0051] Fig.12 is a schematic structural diagram of a battery device according to another embodiment of the present application;

[0052] Fig.13 yes Fig.12 The structural diagram of the box in FIG.

[0053] Fig.14 yes Fig.12 Schematic diagram of DD cross-section structure in;

[0054] Fig.15 yes Fig.14 Schematic diagram of the enlarged structure of part E in FIG.

[0055] The reference numerals in the specific implementation manner are as follows:

[0056] 1. Vehicles;

[0057] 10. Battery device; 11. Controller; 12. Motor;

[0058] 20. Battery cell assembly; 21. Battery cell; 211. End cap; 212. Housing; 213. Electrode assembly; 214. Electrode terminal;

[0059] 30. Box body; 31. Accommodating cavity; 32. Support plate; 33. Side plate; 34. Spacing space; 35. Electrophoresis channel; 36. First mounting hole; 37. Connecting protrusion; 38. Supporting protrusion;

[0060] 40. heat exchange assembly; 41. heat exchange plate; 411. first plate portion; 4111. first surface; 412. second plate portion; 4121. second surface; 4122. first portion; 4123. second portion; 4124. heat exchange flow channel; 413. water inlet end; 414. water outlet end;

[0061] 50. Expansion glue;

[0062] 60. Self-piercing rivets; 61. Connecting rivets;

[0063] 71. first expansion beam; 72. second expansion beam; 73. first lining plate; 74. second lining plate; 75. support beam; 76. mounting member;

[0064] 80. Mounting parts. DETAILED DESCRIPTION

[0065] The following detailed description of the implementation of the technical solution of the present application is provided in conjunction with the accompanying drawings. The following implementation is only used to more clearly illustrate the technical solution of the present application, and is therefore only used as an example, and cannot be used to limit the scope of protection of the present application.

[0066] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0067] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0068] In addition, the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0069] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0070] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0071] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. Lithium-ion batteries have been widely used in mobile and portable electrical appliances due to their high energy density, high average open circuit voltage and long cycle life.

[0072] Power batteries are the core components of electric vehicles. The quality and efficiency of power batteries are directly related to and affect the quality and performance of electric vehicles. The battery pack thermal management system is the core component of the battery system. Its main function is to maintain the battery system in a suitable temperature range during operation, ensuring the performance, thermal safety and cycle life of the battery system.

[0073] The battery pack thermal management system includes a heat exchange component, which is configured to exchange heat with the battery cells to adjust the temperature of the battery cells. The current heat exchange component is generally located at the bottom of the battery box. When the bottom of the battery box is hit, it is easy to cause the heat exchange component to deform and damage, thereby affecting the heat exchange effect on the battery cells.

[0074] In order to solve the problem that the heat exchange component is deformed and damaged when the bottom of the battery box is hit, the present application proposes a battery device and an electrical equipment having the battery device. According to the battery device and electrical equipment of the present application, when the bottom of the box is hit, the damage to the heat exchange component can be reduced.

[0075] The battery device 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 a plurality of battery cells, and the plurality of battery cells may be connected in series, in parallel or in mixed connection through a busbar.

[0076] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0083] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0084] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, 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.

[0085] Figure 1 This is a schematic diagram of the structure of a vehicle 1 provided in some embodiments of the present application. Figure 1 As shown, the vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 10 is arranged inside the vehicle 1, and the battery device 10 can be arranged at the bottom, head or tail of the vehicle 1. The battery device 10 can be used to power the vehicle 1, for example, the battery device 10 can be used as an operating power source for the vehicle 1. The vehicle 1 can also include a controller 11 and a motor 12, and the controller 11 is used to control the battery device 10 to power the motor 12, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0086] In some embodiments of the present application, the battery device 10 can be used not only as an operating power source for the vehicle 1 , but also as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0087] Figure 2 FIG. 1 is a schematic structural diagram of a battery device 10 according to an embodiment of the present application. Figure 3 FIG. 2 is a schematic diagram of the structure of a battery cell assembly 20 according to an embodiment of the present application. Figure 2 and Figure 3As shown, in order to meet different power requirements, the battery device 10 may include a plurality of battery cells 21, where the battery cell 21 refers to the smallest unit constituting the battery device 10. The plurality of battery cells 21 may be connected in series and / or in parallel via electrode terminals for use in various applications. The plurality of battery cells 21 may be connected in series, in parallel, or in hybrid connection, where hybrid connection refers to a mixture of series connection and parallel connection.

[0088] Combination Figure 2 and Figure 3 As shown, the battery device 10 may include a plurality of battery cell assemblies 20 and a box 30, wherein the plurality of battery cell assemblies 20 are accommodated inside the box 30. The box 30 is used to accommodate the battery cell 21 or the battery cell assembly 20 to reduce the influence of liquid or other foreign matter on the charging or discharging of the battery cell 21. The box 30 may be a simple three-dimensional structure such as a single cuboid, cylinder or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders or spheres. The material of the box 30 may be an alloy material such as aluminum alloy, iron alloy, etc., or a polymer material such as polycarbonate, polyisocyanurate foam plastic, or a composite material such as glass fiber and epoxy resin.

[0089] The battery cell assembly 20 may include a plurality of battery cells 21. The plurality of battery cells 21 may be connected in series, in parallel, or in a mixed connection to form the battery cell assembly 20, and the plurality of battery cell assemblies 20 may be connected in series, in parallel, or in a mixed connection to form the battery device 10. The battery cell 21 may be cylindrical, flat, rectangular, or in other shapes, and the embodiments of the present application are not limited thereto. The battery cells 21 are generally divided into three types according to the packaging method: cylindrical battery cells, cubic battery cells, and soft-pack battery cells, and the embodiments of the present application are not limited thereto. However, for the sake of simplicity, the following embodiments are all described using a cubic lithium-ion battery cell 21 as an example.

[0090] Figure 4 The schematic diagram of the exploded structure of the battery cell 21 provided in some embodiments of the present application. The battery cell 21 refers to the smallest unit constituting the battery device 10. Figure 4 The battery cell 21 includes an end cover 211 , a shell 212 and an electrode assembly 213 .

[0091] The end cap 211 refers to a component that covers the opening of the shell 212 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cap 211 can be adapted to the shape of the shell 212 to match the shell 212. Optionally, the end cap 211 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 211 is not easily deformed when squeezed and collided, so that the battery cell 21 can have a higher structural strength and improved safety performance. Functional components such as electrode terminals 214 can be provided on the end cap 211. The electrode terminal 214 can be used to electrically connect to the electrode assembly 213 for outputting or inputting electrical energy of the battery cell 21. In some embodiments, the end cap 211 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold. In some embodiments, an insulating member may be provided inside the end cap 211, and the insulating member may be used to isolate the electrical connection components in the housing 212 from the end cap 211 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0092] The shell 212 is a component used to cooperate with the end cap 211 to form the internal environment of the battery cell 21, wherein the formed internal environment can be used to accommodate the electrode assembly 213, the electrolyte (not shown in the figure) and other components. The shell 212 and the end cap 211 can be independent components, and an opening can be set on the shell 212, and the internal environment of the battery cell 21 is formed by covering the opening with the end cap 211 at the opening. Without limitation, the end cap 211 and the shell 212 can also be integrated. Specifically, the end cap 211 and the shell 212 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 212, the end cap 211 covers the shell 212. The shell 212 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 212 can be determined according to the specific shape and size of the electrode assembly 213. The material of the shell 212 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0093] The electrode assembly 213 is a component in the battery cell 21 where electrochemical reactions occur. One or more electrode assemblies 213 may be contained in the housing 212. The electrode assembly 213 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 213, and the parts of the positive and negative electrode sheets without active materials each constitute a tab (not shown in the figure). The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs connect the electrode terminals 214 to form a current loop.

[0094] Combination Figure 2 , Figures 5 to 8 As shown, in some embodiments of the present application, the battery device 10 includes a box body 30, a battery cell 21, a heat exchange component 40 and an expansion glue 50. A accommodating cavity 31 is formed inside the box body 30, and an opening connected to the accommodating cavity 31 is formed at one end of the box body 30. A support plate 32 is provided at the other end of the box body 30. The battery cell 21 is arranged in the accommodating cavity 31. The heat exchange component 40 is arranged between the support plate 32 and the battery cell 21, and is configured to be able to exchange heat with the battery cell 21. At least part of the heat exchange component 40 is spaced apart from the support plate 32, and a spacing space 34 is formed therebetween. The expansion glue 50 is arranged in the spacing space 34 and is respectively connected to the heat exchange component 40 and the support plate 32.

[0095] Specifically, the box body 30 includes a support plate 32 and a plurality of side plates 33, the plurality of side plates 33 are respectively arranged at the outer edge of the support plate 32, and are connected in sequence head to tail, so that the support plate 32 and the plurality of side plates 33 enclose a receiving cavity 31, and the other end of the receiving cavity 31 opposite to the support plate 32 forms an opening. According to the installation requirements of the box body 30, the support plate 32 can be the bottom plate of the box body 30 and is arranged below the battery cell 21; or, the support plate 32 can be the top plate of the box body 30 and is arranged above the battery cell 21. For the convenience of description, the embodiment of the present application is described only by taking the support plate 32 as the bottom plate of the box body 30 as an example. Optionally, the box body 30 also includes a top plate (not shown in the figure), which is arranged at the first end of the box body 30 away from the support plate 32 and connected to the side plate 33, so that when the battery cell 21 and other components are installed in the receiving cavity 31, the opening of the receiving cavity 31 is covered by the top plate and used to seal the opening.

[0096] The battery cell 21 and other components can be installed in the accommodating cavity 31 through the open end. The battery cell 21 is arranged in the accommodating cavity 31. The number of battery cells 21 can be multiple. Multiple battery cells 21 can be connected in series, in parallel or mixed to form a battery cell assembly 20. The heat exchange assembly 40 is arranged in the accommodating cavity 31. The heat exchange assembly 40 may include a heat exchange plate or a heat exchange tube. For the convenience of description, this application only takes the heat exchange assembly 40 including a heat exchange plate as an example. The heat exchange assembly 40 is arranged between the battery cell 21 and the support plate 32, and is configured to exchange heat with the battery cell 21, so as to adjust the temperature of the battery cell 21, thereby improving the working performance of the battery cell 21. At least part of the heat exchange assembly 40 is spaced apart from the support plate 32, and a spacing space 34 is formed between the two. The expansion glue 50 is arranged in the spacing space 34 and is used to connect the heat exchange assembly 40 and the support plate 32. The expansion glue 50 can expand and deform to support the heat exchange component 40, and has a certain impact resistance, so that the heat exchange component 40 and the support plate 32 can still be spaced apart under the impact of external force.

[0097] According to the battery device 10 of the present application, the heat exchange assembly 40 and the support plate 32 are connected by the expansion glue 50, and the heat exchange assembly 40 is fixed in the accommodating cavity 31, so that the heat exchange assembly 40 is arranged close to the battery cell 21, and the heat exchange efficiency between the heat exchange assembly 40 and the battery cell 21 is improved. At the same time, since the expansion glue 50 has support after curing, when the support plate 32 is deformed by external impact, due to the presence of the expansion glue 50, the deformed support plate 32 cannot directly squeeze the heat exchange assembly 40, thereby reducing the deformation and damage of the heat exchange assembly 40. When the support plate 32 is arranged at the bottom of the box body 30, the damage to the heat exchange assembly 40 can be reduced when the bottom of the box body 30 is hit.

[0098] Combination Figures 5 to 8 As shown, in some embodiments of the application, the expansion glue 50 includes epoxy resin expansion glue.

[0099] The epoxy resin expansion adhesive has good adhesion and is flame retardant, and can reduce the occurrence of combustion when the internal heat of the battery device 10 increases uncontrollably.

[0100] Combination Figures 5 to 8 As shown, in some embodiments of the application, there are multiple expansion adhesives 50 , and the multiple expansion adhesives 50 are arranged in the spacing space 34 at intervals from each other.

[0101] Specifically, the expansion glue 50 is not completely filled in the interval space 34. The number of the expansion glue 50 can be multiple, and the multiple expansion glues 50 are arranged at multiple positions in the interval space 34. After the expansion glue 50 is cured, a strip structure can be formed. The expansion glues 50 in the multiple strip structures are arranged at intervals from each other, and a receiving space is formed between any two expansion glues 50.

[0102] By arranging a plurality of expansion adhesives 50 at intervals in the spacing space 34 , the heat exchange plate 41 and the support plate 32 can be bonded and fixed at a plurality of positions, and a receiving space is formed between any two expansion adhesives 50 to accommodate the deformed support plate 32 , thereby reducing the possibility that the deformed support plate 32 is squeezed by the expansion adhesive 50 to damage the heat exchange plate 41 .

[0103] Combination Figures 5 to 8 As shown, in some embodiments of the application, the curing temperature of the expansion glue 50 is greater than or equal to 150° and less than or equal to 220°.

[0104] Specifically, the expansion glue 50 may be a high-temperature expansion glue, and the curing temperature is greater than or equal to 150° and less than or equal to 220°. Optionally, the curing temperature of the expansion glue 50 may be any value of 150°…180°…200°…220°. The high-temperature expansion glue may be a combination of high-temperature tolerance and thermal expansion properties. When the high-temperature expansion glue encounters high temperature or high heat, it will expand spontaneously, so that the high-temperature expansion glue can maintain good bonding performance and corrosion resistance in a high-temperature environment. Optionally, the expansion glue 50 may be an epoxy resin expansion glue, and expand and cure at 180°C for 20 minutes.

[0105] The heat exchange plate 41 can be bonded to the support plate 32 by the expansion glue 50, and when the expansion glue 50 is heated and expanded, part of the heat exchange plate 41 is spaced apart from the support plate 32. At the same time, since the expansion glue 50 has high temperature tolerance, when the temperature of the expansion glue 50 rises, it is not easy to deform, thereby reducing the phenomenon that the heat exchange plate 41 is lifted toward the support plate 32 and abuts against the support plate 32.

[0106] By setting the expansion glue 50, the expansion glue 50 is used to support the heat exchange component 40 after being heated and expanded, so that the heat exchange component 40 and the support plate 32 are spaced apart, and the heat exchange component 40 is reduced from being close to the support plate 32 after being deformed by heat. At the same time, when the support plate 32 is deformed by external impact, the deformed support plate 32 cannot directly squeeze the heat exchange component 40, thereby reducing damage to the heat exchange component 40. At the same time, the curing temperature of the expansion glue 50 is set to be greater than or equal to 150° and less than or equal to 220°, which can reduce the deformation of the expansion glue 50 when the heat exchange component 40 releases heat, thereby improving the support strength of the expansion glue 50.

[0107] Combination Figures 5 to 9 As shown, in some embodiments of the application, a portion of the edge of the heat exchange component 40 is spaced apart from the support plate 32, and an electrophoresis channel 35 connected to the spacing space 34 is formed therebetween.

[0108] Specifically, in order to reduce the corrosion of the surface of the heat exchange component 40 facing the support plate 32 and the surface of the support plate 32 facing the heat exchange component 40, an electrophoresis channel 35 is formed between the edge of the heat exchange component 40 and the support plate 32, and the electrophoresis channel 35 is connected to the spacing space 34, so that the electrophoresis liquid can be introduced into the spacing space 34 through the electrophoresis channel 35, and the surface of the heat exchange component 40 facing the support plate 32 and the surface of the support plate 32 facing the heat exchange component 40 are formed with an electrophoresis coating under the action of the electrophoresis liquid, thereby improving the corrosion resistance of the heat exchange component 40 and the support plate 32. Optionally, the electrophoresis channel 35 is formed between one side edge of the heat exchange component 40 and the support plate 32, or the electrophoresis channels 35 are formed between multiple side edges of the heat exchange component 40 and the support plate 32. Optionally, the multiple side edges of the heat exchange component 40 are respectively planar structures, and a recessed portion is formed on the partial surface of the support plate 32 facing the heat exchange component, and the electrophoresis channel 35 is formed between the recessed portion and the heat exchange component 40.

[0109] When the heat exchange component 40 is assembled with the box body 30, electrophoretic liquid can be injected into the spacing space 34 between the heat exchange component 40 and the support plate 32 through the electrophoretic channel 35, so as to form an electrophoretic coating on the surface of the heat exchange component 40 and the support plate 32, thereby improving the corrosion resistance of the heat exchange component 40 and the support plate 32.

[0110] Combination Figures 5 to 9 As shown, in some embodiments of the application, the heat exchange assembly 40 includes a heat exchange plate 41 , and the heat exchange plate 41 is riveted to the support plate 32 .

[0111] Specifically, riveting is a common connection structure, and rivets can be passed through the heat exchange plate 41 and the support plate 32 in sequence, thereby connecting and fixing the heat exchange plate 41 and the support plate 32.

[0112] The heat exchange plate 41 and the support plate 32 are connected by riveting, which can improve the connection strength between the heat exchange plate 41 and the support plate 32, and the riveting process is easy to operate.

[0113] Combination Figures 5 to 10 As shown, in some embodiments of the application, the battery device 10 further includes a self-piercing rivet 60 , and the heat exchange plate 41 and the support plate 32 are self-piercing riveted by the self-piercing rivet 60 .

[0114] Self-piercing riveting refers to a type of riveting that does not require holes to be opened in the base material, and uses self-piercing rivets to penetrate the upper base material but not the lower base material to connect multiple base materials together. It can connect different types of metals together. Since the self-piercing rivet only penetrates the upper base material and does not penetrate the lower base material, when the upper and lower base materials and the self-piercing rivet are conductive parts, the self-piercing rivet penetrates the upper base material and can be electrically connected to the upper base material, but since the self-piercing rivet does not penetrate the lower base material, the lower base material cannot be connected to the upper base material through the self-piercing rivet. Optionally, the heat exchange plate 41 can be used as the lower base material, and the support plate 32 can be used as the upper base material.

[0115] By riveting the heat exchange plate 41 and the support plate 32 together with the self-piercing rivets 60, the connection strength between the heat exchange plate 41 and the support plate 32 can be improved, and the self-piercing rivets 60 will not pass through the heat exchange plate 41 and the support plate 32 at the same time, thereby reducing electrochemical corrosion of the heat exchange plate 41 and the support plate 32 through the self-piercing rivets 60.

[0116] Combination Figures 5 to 10 As shown, in some embodiments of the application, a first mounting hole 36 is provided through the support plate 32, and the self-piercing rivet 60 is configured to rivet the heat exchange plate 41 and the support plate 32 along the direction of the heat exchange plate 41 toward the support plate 32, and to squeeze part of the heat exchange plate 41 into the first mounting hole 36.

[0117] Specifically, the support plate 32 is provided with a first mounting hole 36, and the heat exchange plate 41 is not provided with other hole-shaped structures arranged opposite to the first mounting hole 36. When the support plate 32 and the heat exchange plate 41 are riveted together by the self-piercing rivet 60, the self-piercing rivet 60 is arranged on the side of the heat exchange plate 41 away from the support plate 32, and presses the heat exchange plate 41 along the direction of the heat exchange plate 41 toward the support plate 32, and squeezes part of the heat exchange plate 41 into the first mounting hole 36 and rivets.

[0118] By setting the first mounting hole 36 on the support plate 32, part of the heat exchange plate 41 can be squeezed into the first mounting hole 36 under the action of the self-piercing rivet 60, thereby improving the connection strength between the heat exchange plate 41 and the support plate 32, and the self-piercing rivet 60 will not pierce the heat exchange plate 41, thereby reducing the electrochemical corrosion of the heat exchange plate 41 and the support plate 32 through the self-piercing rivet 60.

[0119] Combination Figure 2 , Figures 5 to 10 As shown, in some embodiments of the application, the edge of the heat exchange plate 41 is riveted to the support plate 32 ; and / or, the portion of the heat exchange plate 41 corresponding to the battery cell 21 is riveted to the support plate 32 .

[0120] Specifically, the heat exchange plate 41 is a roughly square plate-shaped structure, including a central area and an edge arranged around the outside of the central area, wherein the central area of ​​the heat exchange plate 41 is arranged opposite to the battery cell 21, and a heat exchange channel 4124 is formed inside the central area, and the heat exchange channel 4124 is used to circulate the heat exchange medium. The heat exchange medium can adjust the temperature of the heat exchange plate 41 during the flow in the heat exchange channel 4124, and then exchange heat with the battery cell 21 through the heat exchange plate 41, and adjust the temperature of the battery cell 21. The heat exchange plate 41 can be riveted to the support plate 32 through the edge, such as self-piercing riveting. Alternatively, the heat exchange plate 41 can be riveted to the support plate 32 through the central area corresponding to the battery cell 21, such as self-piercing riveting. However, when the central area of ​​the heat exchange plate 41 is riveted to the support plate 32, the riveting position should be staggered with the heat exchange channel 4124.

[0121] The heat exchange plate 41 can be riveted to the support plate 32 through its edge according to installation requirements, and / or can be riveted to the support plate 32 through the portion corresponding to the battery cell 21, thereby fixing the heat exchange plate 41 to the support plate 32 and improving the connection strength between the heat exchange plate 41 and the support plate 32.

[0122] Combination Figures 5 to 11 As shown, in some embodiments of the application, the heat exchange plate 41 includes a first plate portion 411 and a second plate portion 412 that are connected to each other. The second plate portion 412 is arranged on the side of the first plate portion 411 facing the support plate 32. The second plate portion 412 is provided with a first portion 4122 protruding away from the first plate portion 411 and a second portion 4123 fitted with the first plate portion 411. The first portion 4122 and the first plate portion 411 form a heat exchange channel 4124, and the second portion 4123 is connected to the expansion glue 50 on the surface facing the support plate 32.

[0123] Specifically, the heat exchange plate 41 is a roughly square plate-shaped structure, and has a larger surface area than the heat exchange tube, thereby improving the heat exchange efficiency between the heat exchange assembly 40 and the battery cell 21. The heat exchange plate 41 includes a first plate portion 411 and a second plate portion 412 connected to each other, and a heat exchange channel 4124 is formed between the first plate portion 411 and the second plate portion 412. The heat exchange plate also includes a water inlet end 413 and a water outlet end 414, and the water inlet end 413 and the water outlet end 414 are respectively connected to the heat exchange channel 4124, so that the heat exchange medium is continuously supplied to the heat exchange channel 4124.

[0124] Optionally, the first plate portion 411 and the second plate portion 412 can be welded to each other, such as by brazing, so as to improve the sealing between the first plate portion 411 and the second plate portion 412. The first plate portion 411 is arranged toward the battery cell 21, and the second plate portion 412 is arranged toward the support plate 32. The second plate portion 412 includes a first portion 4122 and a second portion 4123. The first portion 4122 protrudes in a direction away from the first plate portion 411 and forms a heat exchange channel 4124 between the first plate portion 411. The second portion 4123 is in contact with the first plate portion 411, so as to seal the heat exchange channel 4124. The plate surface of the second portion 4123 facing the support plate 32 is connected to the expansion glue 50.

[0125] Optionally, the edges of the first plate portion 411 and the second plate portion 412 overlap, and when the self-piercing rivet 60 is used to rivet the heat exchange plate 41 and the support plate 32, the self-piercing rivet 60 squeezes the first plate portion 411 and the second plate portion 412 into the first mounting hole 36. Alternatively, when the edge of the second plate portion 412 exceeds the edge of the first plate portion 411, the self-piercing rivet 60 only squeezes the second plate portion 412 into the first mounting hole 36.

[0126] Since the first part 4122 is protruding in the direction away from the first plate part 411, the expansion glue 50 is connected to the second part 4123. The expanded expansion glue 50 can reduce the extrusion deformation caused to the heat exchange flow channel 4124. At the same time, it reduces the space occupied by the expansion glue 50 and the heat exchange plate 41 after being bonded in a direction perpendicular to the support plate 32, thereby reducing the space occupied by the box body 30 in a direction perpendicular to the support plate 32.

[0127] Combination Figures 12 to 15 As shown, in some embodiments of the application, the heat exchange assembly 40 includes a heat exchange plate 41 , and the battery device 10 further includes a connecting rivet 61 , which is riveted to the heat exchange plate 41 and welded to the support plate 32 .

[0128] Specifically, the heat exchange plate 41 is welded to the support plate 32 through the connecting rivet 61. The connecting rivet 61 is only riveted to the heat exchange plate 41, and the riveted end of the connecting rivet 61 only passes through the heat exchange plate 41 and is riveted to the heat exchange plate 41, but the riveted end does not pass through the support plate 32, but is connected to the support plate 32 by welding, so that no hole structure is formed on the support plate 32 due to the connecting rivet 61 passing through the support plate 32, thereby improving the sealing performance of the support plate.

[0129] Optionally, in order to facilitate welding of the support plate 32 and the connecting rivet 61, the portion of the support plate 32 used for welding with the connecting rivet 61 protrudes toward the heat exchange plate 41 and forms a connecting protrusion 37, and the connecting rivet 61 is welded to the connecting protrusion 37, so that the size of the connecting rivet 61 can be reduced. At the same time, the heat exchange plate 41 can be supported by the connecting protrusion 37 to reduce the deformation of the heat exchange plate 41 after heating. Optionally, the number of connecting rivets 61 and connecting protrusions 37 can be multiple, and they are welded one by one.

[0130] The heat exchange plate 41 can be connected to the support plate 32 through the connecting rivet 61, wherein the connecting rivet 61 is riveted to the heat exchange plate 41, and the end of the connecting rivet 61 is welded to the support plate 32, thereby improving the connection strength between the heat exchange plate 41 and the support plate 32. At the same time, since the connecting rivet 61 is only welded to the support plate 32, rather than passing through the support plate 32 and being riveted to the support plate 32, no holes are formed on the surface of the support plate 32, thereby improving the sealing of the support plate 32.

[0131] Combination Figures 5 to 10 As shown, in some embodiments of the application, the expansion glue 50 is configured to have a size of 8 mm to 12 mm after expansion along the direction of the heat exchange component 40 toward the support plate 32 .

[0132] Specifically, along the direction from the heat exchange plate 41 to the support plate 32 , the size of the expansion glue 50 after expansion can be any one of 8 mm…9.5 mm…11 mm…12 mm in a vertical direction.

[0133] The size of the expansion glue 50 after expansion along the direction of the heat exchange component 40 toward the support plate 32 is set to 8mm-12mm, that is, the spacing size between the support plate 32 and part of the heat exchange component 40 is set to 8mm-12mm, thereby increasing the spacing size between the support plate 32 and part of the heat exchange component 40 and reducing the squeeze damage to the heat exchange component 40 after the support plate 32 is deformed by impact.

[0134] Combination Figures 5 to 10 As shown, in some embodiments of the application, an insulating layer is provided on the surface of the heat exchange assembly 40 facing the battery cell 21 .

[0135] After the heat exchange assembly 40 is fixed to the accommodating cavity 31, the surface of the heat exchange plate 41 facing the battery cell 21 can be powder-sprayed, and an insulating layer can be formed on the surface of the heat exchange plate 41 facing the battery cell 21. Optionally, the insulating layer includes an epoxy resin layer.

[0136] By providing an insulating layer on the surface of the heat exchange assembly 40 facing the battery cell 21, the corrosion resistance of the heat exchange assembly 40 can be improved, and when the heat exchange assembly 40 contacts the surface of the battery cell 21, the presence of the insulating layer can reduce the short circuit between the heat exchange assembly 40 and the battery cell 21.

[0137] Combination Figures 5 to 10 As shown, in some embodiments of the application, an impact-resistant layer is provided on the outer surface of the box body 30. Optionally, the impact-resistant layer includes a PVC (Poly Vinyl chloride) layer.

[0138] Specifically, a PVC anti-stone impact adhesive layer may be adhered to the outer surfaces of the support plate 32 and the side plate 33 facing away from the accommodating cavity 31 , thereby improving the deformation and impact resistance of the box body 30 .

[0139] By providing an impact-resistant layer on the outer surface of the box body 30 , deformation of the box body 30 caused by external impact can be reduced, thereby reducing the damage to the heat exchange plate 41 and the battery cell 21 caused by the deformed box body 30 .

[0140] Combination Figures 5 to 10 As shown, in some embodiments of the present application, the battery device 10 also includes a first expansion beam 71 and a second expansion beam 72 spaced apart along a first direction X, and the battery cell 21 is disposed between the first expansion beam 71 and the second expansion beam 72 , and the first direction X is one of the length direction and the width direction of the battery device 10 .

[0141] The battery device 10 includes a length direction, a width direction and a height direction. The height direction is the direction from the battery cell 21 to the support plate 32. The length direction and the width direction are respectively perpendicular to the height direction, and the length direction of the battery device 10 is greater than the width direction. For the convenience of description, in the embodiments of the present application, only the first direction X is the length direction of the battery device 10, and the second direction is the width direction of the battery device 10.

[0142] When the box body 30 is squeezed and deformed along the first direction X, the first expansion beam 71 and the second expansion beam 72 can effectively protect the battery cell 21, and reduce the squeezing of the battery cell 21 by the box body 30 after the box body 30 is deformed along the first direction X. The first expansion beam 71 and the second expansion beam 72 can be welded, clamped, bonded or bolted to the box body 30.

[0143] Combination Figures 5 to 10 As shown, in some embodiments of the present application, the battery device 10 also includes a first liner 73 and a second liner 74 spaced apart along a second direction Y, and the battery cell 21 is disposed between the first liner 73 and the second liner 74 . The second direction Y is the other of the length direction and the width direction of the battery device 10 .

[0144] When the box body 30 is squeezed and deformed along the second direction Y, the first lining plate 73 and the second lining plate 74 can effectively protect the battery cell 21, and reduce the squeezing of the battery cell 21 by the box body 30 after the box body 30 is deformed along the second direction Y. The first lining plate 73 and the second lining plate 74 can be welded, clamped, bonded or bolted to the box body 30.

[0145] Combination Figures 5 to 10 As shown, in some embodiments of the present application, the battery device 10 further includes a support beam 75 , which is disposed on a side of the heat exchange assembly 40 facing the battery cell 21 and sandwiches the heat exchange assembly 40 together with the support plate 32 .

[0146] Specifically, the support beam 75 is arranged corresponding to the central area of ​​the heat exchange plate 41 and is connected to the inner wall of the box body 30. Optionally, the support beam 75 extends along the second direction Y, thereby improving the impact deformation resistance of the box body 30 along the second direction Y. By connecting the support beam 75 to the box body 30, the central area of ​​the heat exchange plate 41 can be clamped and fixed without adding an additional connection structure, while reducing the deformation of the heat exchange plate 41 after heating. Optionally, in order to facilitate the support beam 75 and the support plate 32 to clamp and fix the heat exchange plate 41 together, the support plate 32 is provided with a support protrusion 38 protruding toward the heat exchange plate 41, and the support protrusion 38 is in contact with the second surface 4121 of the heat exchange plate 41. Optionally, the support beam 75 can be welded, clamped, bonded or bolted to the box body 30.

[0147] Optionally, the battery device 10 may be connected to an external support member through a support beam 75, wherein a mounting member 76, such as a bolt mounting seat, is provided on the support beam 75, a second mounting hole (not shown in the figure) corresponding to the mounting member 76 is provided on the heat exchange plate 41, and a third mounting hole (not shown in the figure) is provided through the support protrusion 38. When the battery device 10 is installed on the vehicle frame, a connecting bolt may be used to pass through the third mounting hole, the second mounting hole and the mounting member 76 in sequence and connected to the vehicle frame, thereby connecting and fixing the battery device 10 to the vehicle frame.

[0148] By sandwiching the heat exchange assembly 40 between the support beam 75 and the support plate 32 , the fixing effect of the heat exchange assembly 40 can be improved, while the deformation of the heat exchange assembly 40 after being heated can be reduced.

[0149] In some embodiments of the present application, a mounting member 80 is further disposed on the outside of the box body 30 , and the battery device 10 can be connected to an external support member through the mounting member 80 .

[0150] Specifically, the mounting member 80 is disposed outside the box body 30 , and the mounting members 80 are respectively disposed on two side panels 33 oppositely disposed on both sides of the box body 30 , so that the mounting members 80 on both sides of the box body 30 are connected to the external support member together.

[0151] Combination Figures 5 to 11 As shown, in some embodiments of the present application, the heat exchange plate includes a first surface 4111 facing the battery cell 21 and a second surface 4121 facing the support plate 32 , wherein a structural adhesive is provided between the second surface 4121 and the support plate 32 .

[0152] Specifically, the heat exchange plate 41 has a first surface 4111 and a second surface 4121 that are oppositely arranged, the first surface 4111 is arranged toward the battery cell 21, and the second surface 4121 is arranged toward the support plate 32. The heat exchange component 40 is generally a metal part, so that the heat exchange component 40 can release heat and exchange heat with the battery cell 21. The support plate 32 can also be a metal part. Since electrochemical corrosion is prone to occur when metal parts of different materials come into contact, a structural adhesive is arranged between the second surface 4121 and the support plate 32. Due to the presence of the structural adhesive, the electrochemical corrosion between the heat exchange component 40 and the support plate 32 can be reduced, thereby reducing the damage to the heat exchange component 40 and the support plate 32. At the same time, the presence of the structural adhesive can also improve the connection strength between the heat exchange component 40 and the support plate 32. Optionally, the edge of the heat exchange plate 41 is provided with a structural adhesive on the surface that abuts the support plate 32.

[0153] like Figure 1 As shown, the second aspect of the present application proposes an electrical device, which includes the battery device 10 of any one of the above items.

[0154] Since the electrical equipment in the present application has the same technical features as the battery device 10 in any of the above embodiments and can achieve the same technical effects, it will not be described in detail here.

[0155] like Figure 1 As shown, in some embodiments of the present application, the electrical device may be a vehicle 1, and the vehicle 1 includes a battery device 10 of any of the above embodiments, and the battery device 10 is used to provide electrical energy for the vehicle 1 and to drive the vehicle 1 to move.

[0156] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0157] like Figure 1 As shown, in some embodiments of the present application, the vehicle 1 includes a battery device 10, and the battery device 10 is used to provide electrical energy for the vehicle 1 and to drive the vehicle 1 to move.

[0158] Combination Figure 2 , Figures 5 to 11As shown, the battery device 10 includes a box body 30, a battery cell 21, a heat exchange component 40 and an expansion glue 50. The box body 30 is formed with a receiving cavity 31, one end of the box body 30 is formed with an opening connected to the receiving cavity 31, and the other end of the box body 30 is provided with a support plate 32. The battery cell 21 is arranged in the receiving cavity 31, and the heat exchange component 40 is arranged between the support plate 32 and the battery cell 21, and is configured to be able to exchange heat with the battery cell 21. At least part of the heat exchange component 40 is spaced apart from the support plate 32, and a spacing space 34 is formed between the two. The expansion glue 50 is arranged in the spacing space 34 and is respectively connected to the heat exchange component 40 and the support plate 32. Among them, the surface of the heat exchange component 40 facing the battery cell 21 is provided with an insulating layer, and the outer surface of the box body 30 is provided with an impact-resistant layer. There are multiple expansion glues 50, and multiple expansion glues 50 are spaced apart from each other in the spacing space 34. The expansion glue 50 includes epoxy resin expansion glue, and the curing temperature of the expansion glue 50 is greater than or equal to 150° and less than or equal to 220°. The expansion glue 50 is configured to have a size of 8 mm to 12 mm after expansion along the direction from the heat exchange component 40 to the support plate 32 .

[0159] Combination Figures 5 to 11 As shown, the heat exchange assembly 40 includes a heat exchange plate 41, the edge of the heat exchange plate 41 is spaced apart from the support plate 32, and an electrophoresis channel 35 connected to the spacing space 34 is formed therebetween. The battery device 10 also includes a self-piercing rivet 60, and the edge of the heat exchange plate 41 is self-piercingly riveted to the support plate 32 through the self-piercing rivet 60. Among them, the support plate 32 is penetrated with a first mounting hole 36, and the self-piercing rivet 60 is configured to rivet the heat exchange plate 41 and the support plate 32 along the direction of the heat exchange plate 41 toward the support plate 32, and squeeze a portion of the heat exchange plate 41 into the first mounting hole 36. The heat exchange plate 41 includes a first plate portion 411 and a second plate portion 412 that are connected to each other. The second plate portion 412 is arranged on the side of the first plate portion 411 facing the support plate 32. The second plate portion 412 is provided with a first portion 4122 protruding away from the first plate portion 411 and a second portion 4123 fitted with the first plate portion 411. The first portion 4122 and the first plate portion 411 form a heat exchange channel 4124, and the second portion 4123 is connected to the expansion glue 50 on the surface facing the support plate 32.

[0160] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body, wherein a receiving cavity is formed inside the box body, an opening communicating with the receiving cavity is formed at one end of the box body, and a support plate is provided at the other end of the box body; A battery cell, wherein the battery cell is disposed in the accommodation cavity; a heat exchange assembly, the heat exchange assembly being disposed between the support plate and the battery monomer and being configured to be capable of heat exchange with the battery monomer, at least a portion of the heat exchange assembly being spaced apart from the support plate and forming a spacing space therebetween; Expansion adhesive, the expansion adhesive is arranged in the spacing space and is respectively connected to the heat exchange component and the support plate.

2. The battery device according to claim 1, characterized in that: The expansion adhesive comprises epoxy resin expansion adhesive.

3. The battery device according to claim 1, characterized in that: There are multiple expansion glues, and the multiple expansion glues are arranged in the spacing space at intervals.

4. The battery device according to claim 1, characterized in that: The curing temperature of the expansion adhesive is greater than or equal to 150° and less than or equal to 220°.

5. The battery device according to claim 4, characterized in that: Part of the edge of the heat exchange component is spaced apart from the support plate, and an electrophoresis channel communicating with the spaced space is formed between the two.

6. The battery device according to claim 1, characterized in that: The heat exchange assembly comprises a heat exchange plate, and the heat exchange plate is riveted to the support plate.

7. The battery device according to claim 6, characterized in that: The battery device further comprises self-piercing rivets, and the heat exchange plate and the support plate are self-piercing riveted together by the self-piercing rivets.

8. The battery device according to claim 7, characterized in that: The support plate is penetrated by a first mounting hole, and the self-piercing rivet is configured to rivet the heat exchange plate and the support plate along a direction from the heat exchange plate toward the support plate, and to squeeze a portion of the heat exchange plate into the first mounting hole.

9. The battery device according to claim 6, characterized in that: The edge of the heat exchange plate is riveted to the support plate; and / or the portion of the heat exchange plate corresponding to the battery cell is riveted to the support plate.

10. The battery device according to claim 6, characterized in that: The heat exchange plate includes a first plate portion and a second plate portion connected to each other, the second plate portion is arranged on a side of the first plate portion facing the support plate, the second plate portion is provided with a first portion protruding away from the first plate portion and a second portion fitted with the first plate portion, the first portion and the first plate portion form a heat exchange flow channel, and the surface of the second portion facing the support plate is connected to the expansion glue.

11. The battery device according to claim 1, characterized in that: The heat exchange assembly includes a heat exchange plate, and the battery device also includes a connecting rivet, which is riveted to the heat exchange plate and welded to the support plate.

12. The battery device according to any one of claims 1 to 11, characterized in that: The expansion glue is configured to have a size of 8 mm to 12 mm after expansion along the direction of the heat exchange component toward the support plate.

13. The battery device according to any one of claims 1 to 11, characterized in that: An insulating layer is provided on the surface of the heat exchange assembly facing the battery cell.

14. The battery device according to any one of claims 1 to 11, characterized in that: The outer surface of the box body is provided with an impact-resistant layer.

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

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