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, a single battery, a heat exchange assembly and at least one fixing part, a containing cavity is formed in the box body, the single battery is arranged in the containing cavity, the heat exchange assembly is arranged in the containing cavity and is configured to exchange heat with the single battery, the fixing part is connected with the box body, and the fixing part and the box body jointly clamp and fix the heat exchange assembly. According to the battery device, the heat exchange assembly is jointly clamped and fixed through the fixing part and the box body, so that the heat exchange assembly is fixed in the accommodating cavity of the box body and can exchange heat with the battery monomers, the temperature of the battery monomers is further adjusted, and meanwhile, the heat exchange assembly is connected with the box body without adopting a riveting or screw connection process; the box body and the fixing piece are connected and jointly clamp the heat exchange assembly, so that the fixing reliability of the heat exchange assembly in the box body is improved, and the heat exchange assembly is convenient to install.

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 cell, thereby regulating the temperature of the battery cell. The current heat exchange component is mainly connected to the battery box through a riveting process, which has poor fixing reliability and is not easy to install. 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 problems of poor fixing reliability of heat exchange components and inconvenient installation.

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

[0006] A box body, wherein a receiving cavity is formed inside the box body;

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

[0008] A heat exchange component is disposed in the accommodating cavity and is configured to exchange heat with the battery cell;

[0009] At least one fixing member is connected to the box body, and the fixing member and the box body jointly clamp and fix the heat exchange component.

[0010] According to the battery device of the present application, the heat exchange component is clamped and fixed by the fixing piece and the box body, so that the heat exchange component is fixed in the accommodating cavity of the box body and can exchange heat with the battery cell to adjust the temperature of the battery cell. At the same time, the heat exchange component does not need to be connected to the box body by riveting or screwing. The box body is connected to the fixing piece and the heat exchange component is clamped together, thereby improving the fixation reliability of the heat exchange component in the box body and facilitating the installation of the heat exchange component.

[0011] In some embodiments of the present application, the box body includes a support plate and a plurality of side panels arranged on the outer edge of the support plate, the support plate and the plurality of side panels together form a accommodating cavity, the fixing member is connected to the support plate and / or the side plate, and the heat exchange component is clamped between the support plate and the fixing member.

[0012] By clamping the heat exchange assembly between the support plate and the fixing member, the heat exchange assembly can be arranged on one side of the battery cell in a direction perpendicular to the support plate, and the space occupied by the heat exchange assembly in a direction parallel to the support plate can be reduced, so that more battery cells can be arranged in the accommodating cavity, thereby increasing the energy storage capacity of the battery device.

[0013] In some embodiments of the present application, the fixing member includes a first expansion beam and a second expansion beam spaced apart along a first direction, the first expansion beam and the second expansion beam are arranged in a accommodating cavity, along the first direction, one end of the heat exchange component is clamped between the first expansion beam and the support plate, and the other end of the heat exchange component is clamped between the second expansion beam and the support plate, and the first direction is one of the length direction and the width direction of the battery device.

[0014] By clamping one end of the heat exchange assembly along the first direction between the first expansion beam and the support plate, and clamping the other end of the heat exchange assembly along the first direction between the second expansion beam and the support plate, the two ends of the heat exchange assembly can be fixed along the first direction, thereby improving the reliability of fixing the heat exchange assembly in the box. At the same time, the first expansion beam and the second expansion beam are respectively conventional structures in the box, so the heat exchange assembly can be fixed without adding an additional fixing structure, thereby reducing costs.

[0015] In some embodiments of the present application, the fixing member also includes a first lining plate and a second lining plate spaced apart along a second direction, the first lining plate and the second lining plate are arranged in the accommodating cavity, and along the second direction, one end of the heat exchange component is clamped between the first lining plate and the support plate, and the other end of the heat exchange component is clamped between the second lining plate and the support plate, and the second direction is perpendicular to the first direction.

[0016] By clamping one end of the heat exchange assembly along the second direction between the first lining plate and the support plate, and clamping the other end of the heat exchange assembly along the second direction between the second lining plate and the support plate, the two ends of the heat exchange assembly can be fixed along the second direction, thereby improving the reliability of fixing the heat exchange assembly in the box. At the same time, the first lining plate and the second lining plate are respectively conventional structures in the box, so the heat exchange assembly can be fixed without adding an additional fixing structure, thereby reducing costs.

[0017] In some embodiments of the present application, the heat exchange assembly includes a first surface facing the fixing member and a second surface facing the support plate, wherein;

[0018] Structural adhesive is provided between the first surface and the fixing member, and / or structural adhesive is provided between the second surface and the supporting plate.

[0019] By setting structural adhesive between the heat exchange component and the fixing part, when the heat exchange component and the fixing part are conductive parts of different materials, the presence of the structural adhesive can reduce the electrochemical corrosion between the heat exchange component and the fixing part, thereby reducing the damage to the heat exchange component and the fixing part; by setting structural adhesive between the heat exchange component and the support plate, when the heat exchange component and the support plate are conductive parts of different materials, the presence of the structural adhesive can reduce the electrochemical corrosion between the heat exchange component and the support plate, thereby reducing the damage to the heat exchange component and the support plate.

[0020] In some embodiments of the present application, the heat exchange assembly includes a heat exchange plate, and an edge of the heat exchange plate is clamped between the support plate and the fixing member.

[0021] The heat exchange plate has a larger surface area than the heat exchange tube, thereby improving the heat exchange efficiency between the heat exchange component and the battery cell. At the same time, the edge of the heat exchange plate is clamped between the support plate and the fixing part, that is, the fixing part is set corresponding to the edge position of the heat exchange plate, reducing the space occupied by the fixing part in the accommodating cavity, so that more battery cells can be arranged in the accommodating cavity, thereby increasing the energy storage capacity of the battery device.

[0022] In some embodiments of the present application, a spacing space is formed between some of the heat exchange plates and the support plate, and an electrophoresis channel connected to the spacing space is formed between the edge of the heat exchange plate and the support plate.

[0023] By forming a spacing space between the heat exchange plate and the support plate, and forming an electrophoretic channel connected to the spacing space between the edge of the heat exchange plate and the support plate, when the heat exchange plate and the box are assembled, electrophoretic liquid can be injected into the spacing space between the heat exchange plate and the support plate through the electrophoretic channel, thereby forming an electrophoretic coating on the surface of the heat exchange plate and the support plate, thereby improving the corrosion resistance of the heat exchange plate and the support plate.

[0024] In some embodiments of the present application, an expansion glue is provided in the spacing space, the curing temperature of the expansion glue is greater than or equal to 150° and less than or equal to 220°, and the heat exchange plate is connected to the support plate through the expansion glue.

[0025] By setting the expansion glue, the expansion glue is used to support the heat exchange plate after being heated and expanded, so that the heat exchange plate and the support plate are spaced apart, reducing the heat exchange plate 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 the 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 plate releases heat, thereby improving the support strength of the expansion glue.

[0026] In some embodiments of the present 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.

[0027] 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.

[0028] In some embodiments of the present application, a plug hole is formed through at least one side edge of the heat exchange plate, and a plug protrusion corresponding to the plug hole is formed on the support plate. The plug protrusion passes through the plug hole and is welded to the fixing member.

[0029] By providing the plug-in hole, the plug-in protrusion on the support plate can pass through the plug-in hole and be welded to the fixing piece, thereby connecting and fixing the support plate and the fixing piece, and clamping and fixing the heat exchange plate together through the support plate and the fixing piece. At the same time, by plugging the plug-in protrusion into the plug-in hole, the heat exchange plate can be positioned and installed on the support plate, thereby reducing the position deviation of the heat exchange plate during the installation process.

[0030] In some embodiments of the present application, a first mounting hole is provided through the portion of the heat exchange plate corresponding to the battery cell, and the fixing member also includes a fixing plate, part of the fixing plate is arranged on the side of the heat exchange plate facing the battery cell and abuts against the heat exchange plate, and another part of the fixing plate passes through the first mounting hole and is connected to the support plate.

[0031] By providing a fixing plate and clamping the heat exchange plate together with the fixing plate and the support plate, the fixing effect of the heat exchange plate can be improved and the deformation of the heat exchange plate after being heated can be reduced.

[0032] In some embodiments of the present application, a portion of the heat exchange plate is recessed in a direction away from the battery cell and is formed with a mounting groove, and a portion of the fixing plate is disposed in the mounting groove.

[0033] By arranging the fixing plate in the mounting groove, the fixing plate can be reduced in protrusion from the surface of the heat exchange plate toward the battery cell, thereby reducing the occurrence of the phenomenon of the fixing plate abutting against the battery cell.

[0034] In some embodiments of the present application, the battery device further includes a support beam, which is disposed on a side of the heat exchange assembly facing the battery cell and sandwiches the heat exchange assembly together with the support plate.

[0035] By clamping the heat exchange component between the support beam and the support plate, the fixing effect of the heat exchange component can be improved, and the deformation of the heat exchange component after being heated can be reduced.

[0036] In some embodiments of the present application, an insulating layer is provided on the surface of the heat exchange assembly facing the battery cell.

[0037] 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.

[0038] In some embodiments of the present application, an impact-resistant layer is provided on the outer surface of the box.

[0039] 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.

[0040] The second aspect of the present application further proposes an electrical device, which includes any one of the above-mentioned battery devices.

[0041] 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

[0042] 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:

[0043] Figure 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

[0044] Figure 2 is a schematic structural diagram of a battery device provided in one embodiment of the present application;

[0045] Figure 3 is a schematic structural diagram of a battery cell assembly provided in one embodiment of the present application;

[0046] Figure 4 is a schematic diagram of the exploded structure of a battery cell provided in one embodiment of the present application;

[0047] Figure 5 yes Figure 2A top view of a battery device with a battery cell removed;

[0048] Figure 6 yes Figure 5 An isometric view of a battery device in FIG.

[0049] Figure 7 yes Figure 5 A schematic diagram of a partially exploded structure of a battery device;

[0050] Figure 8 yes Figure 5 AA section structure schematic diagram in;

[0051] Fig. 9 yes Figure 8 A schematic diagram of the enlarged structure of part B in FIG.

[0052] Fig.10 yes Figure 7 A schematic diagram of the structure of the heat exchange component in FIG.

[0053] Fig.11 yes Figure 7 A top view of the box in FIG.

[0054] Fig.12 yes Figure 7 Axonometric drawing of the box in ;

[0055] Fig.13 yes Figure 7 A schematic diagram of the connection structure between the box and the heat exchange component;

[0056] Fig.14 yes Figure 8 Schematic diagram of the enlarged structure of part C in.

[0057] The reference numerals in the specific implementation manner are as follows:

[0058] 1. Vehicles;

[0059] 10. Battery device; 11. Controller; 12. Motor;

[0060] 20. Battery cell assembly; 21. Battery cell; 211. End cap; 212. Housing; 213. Electrode assembly; 214. Electrode terminal;

[0061] 30. Box body; 31. Accommodating cavity; 32. Support plate; 33. Side plate; 34. Electrophoresis channel; 35. Inserting protrusion; 36. Connecting protrusion; 37. Supporting protrusion; 38. Spacing space;

[0062] 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. plug hole; 414. first mounting hole; 415. second mounting hole; 416. water inlet; 417. water outlet;

[0063] 50. fixing member; 51. first expansion beam; 52. second expansion beam; 53. first lining plate; 54. second lining plate; 55. fixing plate;

[0064] 60. Expansion glue;

[0065] 70. Support beam; 71. Mounting parts;

[0066] 80. Mounting parts. DETAILED DESCRIPTION

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] The battery pack thermal management system includes a heat exchange component, which is configured to exchange heat with the battery cell, thereby regulating the temperature of the battery cell. The current heat exchange component is mainly connected to the battery box through a riveting process, which has poor fixing reliability and is not easy to install.

[0076] In order to solve the problems of poor fixing reliability and inconvenient installation of the heat exchange component, 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, the heat exchange component can exchange heat with the battery cell, thereby adjusting the temperature of the battery cell. At the same time, the heat exchange component does not need to be connected to the box body by riveting or screw connection, and can improve the fixing reliability of the heat exchange component in the box body, and facilitate the installation of the heat exchange component.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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 .

[0089] 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 3 As 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.

[0090] 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 cells 21 or the battery cell assemblies 20 to reduce the influence of liquid or other foreign matter on the charging or discharging of the battery cells 21. The box 30 may be a simple three-dimensional structure such as a single cuboid, a cylinder, or a sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as a cuboid, a cylinder, or a sphere.

[0091] 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.

[0092] 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 .

[0093] 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.

[0094] 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.

[0095] 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.

[0096] Combination Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the first aspect of the present application proposes a battery device 10. In some embodiments of the present application, the battery device 10 includes a case body 30, a battery cell 21, a heat exchange assembly 40 and at least one fixing member 50. A accommodating cavity 31 is formed inside the case body 30. The battery cell 21 is disposed in the accommodating cavity 31. The heat exchange assembly 40 is disposed in the accommodating cavity 31 and is configured to exchange heat with the battery cell 21. The fixing member 50 is connected to the case body 30. The fixing member 50 and the case body 30 jointly clamp and fix the heat exchange assembly 40.

[0097] Specifically, a housing 30 is formed with a housing cavity 31, and an opening is formed at one end of the housing cavity 31, and the battery cell 21 and other components can be installed in the housing cavity 31 through the opening. The battery cell 21 is arranged in the housing cavity 31, and the number of the battery cell 21 can be multiple, and the 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 housing cavity 31, and 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 for explanation. The heat exchange assembly 40 is arranged on one side of the battery cell 21, and is configured to heat exchange 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. The fixing member 50 can be connected to the housing 30, including a detachable connection or a fixed connection. Among them, the detachable connection includes a snap connection or a bolt connection. The fixed connection includes welding or bonding. When assembling the battery device 10, the heat exchange component 40 can be first placed in the accommodating cavity 31, and then the fixing member 50 is connected to the box body 30, and the heat exchange component 40 is clamped between the fixing member 50 and the box body 30, so that the heat exchange component 40 is assembled in the accommodating cavity 31 and fixed.

[0098] According to the battery device 10 of the present application, the heat exchange component 40 is clamped and fixed by the fixing member 50 and the box body 30, so that the heat exchange component 40 is fixed in the accommodating cavity 31 of the box body 30, and can exchange heat with the battery cell 21, thereby adjusting the temperature of the battery cell 21. At the same time, the heat exchange component 40 does not need to be connected to the box body 30 by riveting or screwing. The box body 30 is connected to the fixing member 50 and the heat exchange component 40 is clamped together, thereby improving the fixing reliability of the heat exchange component 40 in the box body 30 and facilitating the installation of the heat exchange component 40.

[0099] Combination Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments of the present application, the box body 30 includes a support plate 32 and a plurality of side panels 33 arranged on the outer edge of the support plate 32, the support plate 32 and the plurality of side panels 33 together form a accommodating cavity 31, the fixing member 50 is connected to the support plate 32 and / or the side panel 33, and the heat exchange assembly 40 is clamped between the support plate 32 and the fixing member 50.

[0100] Specifically, a plurality of side plates 33 are respectively arranged at the outer edge of the support plate 32, and are connected end to end in sequence, so that the support plate 32 and the plurality of side plates 33 enclose a receiving chamber 31, and the other end of the receiving chamber 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 chamber 31, the opening of the receiving chamber 31 is covered by the top plate and used to seal the opening.

[0101] The heat exchange assembly 40 is disposed on the side of the support plate 32 facing the battery cell 21, and exchanges heat with the battery cell 21 in a direction perpendicular to the support plate 32. The fixing member 50 can be connected to the support plate 32 and / or the side plate 33 according to actual installation requirements, and after the connection, the heat exchange assembly 40 is sandwiched between the support plate 32 and the fixing member.

[0102] By clamping the heat exchange assembly 40 between the support plate 32 and the fixing member 50, the heat exchange assembly 40 can be arranged on one side of the battery cell 21 in a direction perpendicular to the support plate 32, and the space occupied by the heat exchange assembly 40 in a direction parallel to the support plate 32 can be reduced, so that more battery cells 21 can be arranged in the accommodating cavity 31, thereby increasing the energy storage capacity of the battery device 10.

[0103] Combination Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments of the present application, the fixing member 50 includes a first expansion beam 51 and a second expansion beam 52 spaced apart along a first direction X, the first expansion beam 51 and the second expansion beam 52 are disposed in the accommodating cavity 31, and along the first direction X, one end of the heat exchange component 40 is clamped between the first expansion beam 51 and the support plate 32, and the other end of the heat exchange component 40 is clamped between the second expansion beam 52 and the support plate 32, and the first direction X is one of the length direction and the width direction of the battery device 10.

[0104] 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.

[0105] Specifically, the first expansion beam 51 and the second expansion beam 52 are arranged at intervals in the accommodating cavity 31 along the first direction X, and the battery cell 21 is arranged between the first expansion beam 51 and the second expansion beam 52. When the box body 30 is squeezed and deformed along the first direction X, the first expansion beam 51 and the second expansion beam 52 can effectively protect the battery cell 21, and reduce the squeezing of the battery cell 21 by the box body 30 after deformation along the first direction X. By connecting the first expansion beam 51 and the second expansion beam 52 to the box body 30, the two ends of the heat exchange assembly 40 along the first direction X can be clamped and fixed without adding an additional connection structure, and the installation of the heat exchange assembly 40 is facilitated. Optionally, the first expansion beam 51 and the second expansion beam 52 can be welded, clamped, bonded or bolted to the box body 30.

[0106] By clamping one end of the heat exchange assembly 40 along the first direction X between the first expansion beam 51 and the support plate 32, and clamping the other end of the heat exchange assembly 40 along the first direction X between the second expansion beam 52 and the support plate 32, the two ends of the heat exchange assembly 40 can be fixed along the first direction X, thereby improving the fixing reliability of the heat exchange assembly 40 in the box body 30. At the same time, the first expansion beam 51 and the second expansion beam 52 are respectively conventional structures in the box body 30, so the heat exchange assembly 40 can be fixed without adding an additional fixing structure, thereby reducing costs.

[0107] Combination Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments of the present application, the fixing member 50 also includes a first lining plate 53 and a second lining plate 54 spaced apart along a second direction Y, the first lining plate 53 and the second lining plate 54 are arranged in the accommodating cavity 31, along the second direction Y, one end of the heat exchange component 40 is clamped between the first lining plate 53 and the support plate 32, and the other end of the heat exchange component 40 is clamped between the second lining plate 54 and the support plate 32, the second direction Y is perpendicular to the first direction X, and the second direction Y can be the other of the length direction and the width direction of the battery device 10.

[0108] Specifically, the first liner 53 and the second liner 54 are arranged at intervals in the accommodating cavity 31 along the second direction Y, and the battery cell 21 is arranged between the first liner 53 and the second liner 54. When the box body 30 is squeezed and deformed along the second direction Y, the first liner 53 and the second liner 54 can effectively protect the battery cell 21 and reduce the squeezing of the battery cell 21 by the deformed box body 30. By connecting the first liner 53 and the second liner 54 to the box body 30, the two ends of the heat exchange assembly 40 along the second direction Y can be clamped and fixed without adding an additional connection structure, and the installation of the heat exchange assembly 40 is facilitated. Optionally, the first liner 53 and the second liner 54 can be welded, clamped, bonded or bolted to the box body 30.

[0109] By clamping one end of the heat exchange assembly 40 along the second direction Y between the first lining plate 53 and the support plate 32, and clamping the other end of the heat exchange assembly 40 along the second direction Y between the second lining plate 54 and the support plate 32, the two ends of the heat exchange assembly 40 can be fixed along the second direction Y, thereby improving the fixing reliability of the heat exchange assembly 40 in the box body 30. At the same time, the first lining plate 53 and the second lining plate 54 are respectively conventional structures in the box body 30, so the heat exchange assembly 40 can be fixed without adding an additional fixing structure, thereby reducing costs. Figure 5 , Figure 8 and Fig. 9 As shown, in some embodiments of the present application, the heat exchange assembly 40 includes a first surface 4111 facing the fixing member 50 and a second surface 4121 facing the support plate 32, wherein;

[0110] Structural adhesive (not shown in the figure) is disposed between the first surface 4111 and the fixing member 50 , and / or structural adhesive is disposed between the second surface 4121 and the supporting plate 32 .

[0111] Specifically, the heat exchange assembly 40 has a first surface 4111 and a second surface 4121 which are arranged oppositely. The first surface 4111 is arranged toward the battery cell 21 and the fixing part 50, and the second surface 4121 is arranged toward the support plate 32. The heat exchange assembly 40 is generally a metal part, so that the heat exchange assembly 40 can release heat and exchange heat with the battery cell 21. The fixing part 50 includes a first expansion beam 51, a second expansion beam 52, a first lining plate 53 and a second lining plate 54. In order to improve its own support performance and anti-deformation ability, the fixing part 50 is also a metal part. Since electrochemical corrosion is prone to occur when metal parts of different materials come into contact, a structural adhesive is provided between the first surface 4111 and the fixing part 50. Due to the presence of the structural adhesive, the electrochemical corrosion between the heat exchange assembly 40 and the fixing part 50 can be reduced, thereby reducing the damage to the heat exchange assembly 40 and the fixing part 50. At the same time, the presence of the structural adhesive can also improve the connection strength between the heat exchange assembly 40 and the fixing part 50. Fig. 9It is an enlarged structural diagram of the heat exchange component 40 sandwiched between the first lining plate 53 and the support plate 32. Among them, structural adhesive is provided between the first surface 4111 of the heat exchange component 40 and the first lining plate 53, and structural adhesive is provided between the second surface 4121 of the heat exchange component 40 and the support plate 32.

[0112] Optionally, the support plate 32 may be a metal part. When the support plate 32 is in direct contact with the heat exchange assembly 40, electrochemical corrosion is also likely to occur. Therefore, a structural adhesive is provided between the second surface 4121 and the support plate 32. Due to the presence of the structural adhesive, electrochemical corrosion between the heat exchange assembly 40 and the support plate 32 can be reduced, thereby reducing damage to the heat exchange assembly 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 assembly 40 and the support plate 32.

[0113] Optionally, the heat exchange assembly 40 may be a heat exchange plate 41, which 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, and the heat exchange channel 4124 is used to circulate a 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. Wherein. The first plate portion 411 may be arranged on the side of the second plate portion 412 facing the battery cell 21, and the surface of the first plate portion 411 facing the battery cell 21 is the first surface 4111. The surface of the second plate portion 412 facing the support plate 32 is the second surface 4121.

[0114] Optionally, the heat exchange component 40 may be an aluminum alloy part, and the fixing part and the support plate 32 may be steel parts.

[0115] Combination Figure 5 , Figure 8 and Fig. 9 As shown, in some embodiments of the present application, the heat exchange assembly 40 includes a heat exchange plate 41 , and the edge of the heat exchange plate 41 is clamped between the support plate 32 and the fixing member 50 .

[0116] 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 edge of the heat exchange plate 41 is clamped between the support plate 32 and the fixing member, so as to fix the heat exchange plate 41. The central area of ​​the heat exchange plate 41 is arranged opposite to the battery cell 21, and a heat exchange flow channel 4124 is formed inside the central area. Since in some embodiments of the present application, the fixing member 50 includes a first expansion beam 51, a second expansion beam 52, a first lining plate 53 and a second lining plate 54, and the first expansion beam 51, the second expansion beam 52, the first lining plate 53 and the second lining plate 54 are arranged around the periphery of the battery cell 21 and are arranged opposite to the edge of the heat exchange plate 41, therefore, the edge of the heat exchange plate 41 can be clamped between the support plate 32 and the fixing member.

[0117] Optionally, the heat exchange plate 41 has a first surface 4111 and a second surface 4121 that are oppositely disposed, and the edge position of the first surface 4111 and the edge position of the second surface 4121 are respectively planes, thereby facilitating clamping the edge of the heat exchange plate 41 between the support plate 32 and the fixing member.

[0118] The heat exchange plate 41 has a larger surface area than the heat exchange tube, thereby improving the heat exchange efficiency between the heat exchange component 40 and the battery cell 21. At the same time, the edge of the heat exchange plate 41 is clamped between the support plate 32 and the fixing member 50, that is, the fixing member 50 is set to correspond to the edge position of the heat exchange plate 41, reducing the space occupied by the fixing member 50 in the accommodating cavity 31, so that more battery cells 21 can be arranged in the accommodating cavity 31, thereby increasing the energy storage capacity of the battery device 10.

[0119] Combination Figures 5 to 13 As shown, in some embodiments of the present application, a spacing space 38 is formed between part of the heat exchange plate 41 and the support plate 32 , and an electrophoresis channel 34 connected to the spacing space 38 is formed between the edge of the heat exchange plate 41 and the support plate 32 .

[0120] Specifically, the central area of ​​the heat exchange plate 41 corresponding to the battery cell 21 can be spaced apart from the support plate 32, and a space 38 is formed between the heat exchange plate 41 and the support plate 32. Due to the existence of the space 38, when the support plate 32 is deformed by impact, it cannot directly act on the heat exchange plate 41, thereby reducing the heat exchange plate 41 from being squeezed by the deformed support plate 32 and being deformed and damaged. At the same time, spacing part of the heat exchange plate 41 from the support plate 32 can also reduce electrochemical corrosion between the heat exchange plate 41 and the support plate 32.

[0121] In order to reduce the corrosion of the surface of the heat exchange plate 41 facing the support plate 32 and the surface of the support plate 32 facing the heat exchange plate 41, an electrophoresis channel 34 is formed between the edge of the heat exchange plate 41 and the support plate 32, and the electrophoresis channel 34 is connected to the spacing space 38, so that the electrolyte can be introduced into the spacing space 38 through the electrophoresis channel 34, and the surface of the heat exchange plate 41 facing the support plate 32 and the surface of the support plate 32 facing the heat exchange plate 41 are coated under the action of the electrolyte, thereby improving the corrosion resistance of the heat exchange plate 41 and the support plate 32. Optionally, the electrophoresis channel 34 is formed between one side edge of the square structure of the heat exchange plate 41 and the support plate 32, or the electrophoresis channel 34 is formed between multiple side edges of the square structure of the heat exchange plate 41 and the support plate 32. Optionally, the multiple side edges of the square structure of the heat exchange plate 41 are respectively planar structures, and a recessed portion is formed on the partial surface of the support plate 32 facing the heat exchange plate 41, and the electrophoresis channel 34 is formed between the recessed portion and the heat exchange plate 41.

[0122] By forming a spacing space 38 between the heat exchange plate 41 and the support plate 32, and forming an electrophoretic channel 34 connected to the spacing space 38 between the edge of the heat exchange plate 41 and the support plate 32, when the heat exchange plate 41 is assembled with the box body 30, electrophoretic liquid can be injected into the spacing space 38 between the heat exchange plate 41 and the support plate 32 through the electrophoretic channel 34, thereby forming an electrophoretic coating on the surface of the heat exchange plate 41 and the support plate 32, thereby improving the corrosion resistance of the heat exchange plate 41 and the support plate 32.

[0123] Combination Figures 5 to 13 As shown, in some embodiments of the present application, an expansion glue 60 is provided in the spacing space 38 , the curing temperature of the expansion glue 60 is greater than 150° and less than 220°, and the heat exchange plate 41 is connected to the support plate 32 via the expansion glue 60 .

[0124] Specifically, the expansion glue 60 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 60 may be any value in the range of 150°…180°…200°…220°. The high temperature expansion glue combines high temperature tolerance and thermal expansion characteristics. 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 60 may be an epoxy resin expansion glue.

[0125] The heat exchange plate 41 can be bonded to the support plate 32 by the expansion glue 60, and when the expansion glue 60 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 60 has high temperature tolerance, when the temperature of the expansion glue 60 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. The temperature increase of the expansion glue 60 includes the temperature increase during the process of the heat exchange plate 41 releasing heat, or the temperature increase when the electrophoresis phenomenon occurs in the spacing space 38.

[0126] By setting the expansion glue 60, the expansion glue 60 is used to support the heat exchange plate 41 after being heated and expanded, so that the heat exchange plate 41 and the support plate 32 are spaced apart, and the heat exchange plate 41 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 plate 41, thereby reducing damage to the heat exchange plate 41. At the same time, the curing temperature of the expansion glue 60 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 60 when the heat exchange plate 41 releases heat, thereby improving the support strength of the expansion glue 60.

[0127] Combination Figures 5 to 13 As shown, in some embodiments of the present 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 that is in contact 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 60 on the plate surface facing the support plate 32.

[0128] Specifically, the heat exchange plate 41 is a substantially square plate structure, including 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 416 and a water outlet end 417, and the water inlet end 416 and the water outlet end 417 are respectively connected to the heat exchange channel 4124, so that the heat exchange medium is continuously supplied to the heat exchange channel 4124.

[0129] 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 fixing member, 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 60.

[0130] Since the first part 4122 is protruding in the direction away from the first plate part 411, the expansion glue 60 is connected to the second part 4123. The expanded expansion glue 60 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 60 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.

[0131] Combination Figures 5 to 13 As shown, in some embodiments of the present application, a plug hole 413 is penetrated through at least one side edge of the heat exchange plate 41, and a plug protrusion 35 corresponding to the plug hole 413 is provided on the support plate 32. The plug protrusion 35 passes through the plug hole 413 and is welded to the fixing part 50.

[0132] Specifically, the plug hole 413 penetrates the plate surface of the heat exchange plate 41. The size of the plug hole 413 is larger than the size of the plug protrusion 35, so that the plug protrusion 35 passes through the plug hole 413 and is welded to the fixing member 50. Optionally, the plug hole 413 may penetrate the first plate portion 411 and the second plate portion 412 in sequence, or, when the edge of the second plate portion 412 exceeds the first plate portion 411, the plug hole 413 may only penetrate the edge of the second plate portion 412. Optionally, one side edge of the square structure of the heat exchange plate 41 is penetrated with the plug hole 413, or multiple side edges of the square structure of the heat exchange plate 41 are respectively penetrated with the plug holes 413.

[0133] By providing the insertion hole 413, the insertion protrusion 35 on the support plate 32 can pass through the insertion hole 413 and be welded to the fixing member 50, thereby connecting and fixing the support plate 32 and the fixing member 50, and clamping and fixing the heat exchange plate 41 through the support plate 32 and the fixing member 50. At the same time, by inserting the insertion protrusion 35 into the insertion hole 413, the heat exchange plate 41 can be positioned and installed on the support plate 32, thereby reducing the position deviation of the heat exchange plate 41 during the installation process.

[0134] Combination Figures 5 to 14As shown, in some embodiments of the present application, a first mounting hole 414 is provided through the portion of the heat exchange plate 41 corresponding to the battery cell 21, and the fixing member 50 also includes a fixing plate 55, part of the fixing plate 55 is arranged on the side of the heat exchange plate 41 facing the battery cell 21 and abuts against the heat exchange plate 41, and another part of the fixing plate 55 passes through the first mounting hole 414 and is connected to the support plate 32.

[0135] Specifically, the central area of ​​the heat exchange plate 41 corresponding to the battery cell 21 is penetrated with a first mounting hole 414, a part of the fixing sheet 55 is arranged on the side of the heat exchange plate 41 facing the battery cell 21, and abuts against the heat exchange plate 41, and another part of the fixing sheet 55 passes through the first mounting hole 414 and is connected to the support plate 32, so that the heat exchange plate 41 is clamped and fixed by the fixing sheet 55 and the support plate 32. Optionally, the fixing sheet 55 and the support plate 32 are welded or bonded. Optionally, in order to facilitate the connection between the support plate 32 and the fixing sheet 55, the part of the support plate 32 used to connect with the fixing sheet 55 protrudes toward the direction of the heat exchange plate 41, and forms a connecting protrusion 36. After the fixing sheet 55 passes through the first mounting hole 414, it is connected to the connecting protrusion 36, so that the size of the fixing sheet 55 inserted in the first mounting hole 414 can be reduced. Optionally, the number of fixing plates 55 and the number of first mounting holes 414 can be multiple, and the number of connecting protrusions 36 can be multiple, and they are arranged one-to-one corresponding to the multiple first mounting holes 414, so that the multiple fixing plates 55 are respectively connected to the multiple connecting protrusions 36 and are used to clamp and fix the heat exchange plate 41.

[0136] By providing the fixing sheet 55 and sandwiching the heat exchange plate 41 together with the fixing sheet 55 and the support plate 32 , the fixing effect of the heat exchange plate 41 can be improved, and deformation of the heat exchange plate 41 after being heated can be reduced.

[0137] Combination Figures 5 to 14 As shown, in some embodiments of the present application, a portion of the heat exchange plate 41 is recessed in a direction away from the battery cell 21 and is formed with a mounting groove, and a portion of the fixing sheet 55 is disposed in the mounting groove.

[0138] Specifically, part of the heat exchange plate 41 is recessed in the direction away from the battery cell 21, that is, recessed in the direction of the support plate 32, thereby forming a mounting groove, and the bottom of the mounting groove is penetrated by a first mounting hole 414. Part of the fixing sheet 55 can be arranged in the mounting groove and abut against the bottom of the mounting groove. Compared with directly setting the fixing sheet 55 on the surface of the heat exchange plate 41 facing the battery cell 21, setting the fixing sheet 55 in the mounting groove can increase the spacing between the fixing sheet 55 and the battery cell 21, thereby reducing the occurrence of the fixing sheet 55 abutting against the battery cell 21. Optionally, one end of the fixing sheet 55 facing the battery cell 21 does not exceed the plate surface of the heat exchange plate 41.

[0139] By disposing the fixing sheet 55 in the installation groove, the fixing sheet 55 can be reduced from protruding out of the surface of the heat exchange plate 41 toward the battery cell 21 , thereby reducing the occurrence of the fixing sheet 55 abutting against the battery cell 21 .

[0140] Combination Figures 5 to 13 As shown, in some embodiments of the present application, the battery device 10 further includes a support beam 70 , 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 .

[0141] Specifically, the support beam 70 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 70 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 70 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 70 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 37 protruding toward the heat exchange plate 41, and the support protrusion 37 is in contact with the second surface 4121 of the heat exchange plate 41. Optionally, the support beam 70 can be welded, clamped, bonded or bolted to the box body 30.

[0142] Optionally, the battery device 10 may be connected to an external support member through a support beam 70, wherein a mounting member 71, such as a bolt mounting seat, is provided on the support beam 70, a second mounting hole 415 corresponding to the mounting member 71 is provided on the heat exchange plate 41, and a third mounting hole (not shown in the figure) is provided through the support protrusion 37. 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 415 and the mounting member 71 in sequence and connected to the vehicle frame, thereby connecting and fixing the battery device 10 to the vehicle frame.

[0143] By sandwiching the heat exchange assembly 40 between the support beam 70 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.

[0144] 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 .

[0145] 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.

[0146] Combination Figure 2 , Figure 5 , Figure 7 and Figure 8 As shown, in some embodiments of the present application, an insulating layer (not shown in the figure) is provided on the surface of the heat exchange assembly 40 facing the battery cell 21 .

[0147] Specifically, 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.

[0148] 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.

[0149] Combination Figure 2 , Figure 5 , Figure 7 and Figure 8 As shown, in some embodiments of the present application, the outer surface of the box body 30 is provided with an impact-resistant layer (not shown in the figure).

[0150] Specifically, an impact-resistant layer may be provided on the outer surfaces of the support plate 32 and the side plate 33 away from the accommodating cavity 31, thereby improving the deformation and impact resistance of the box body 30. Optionally, the impact-resistant layer includes a PVC (Poly Vinyl Chloride) layer.

[0151] 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 .

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] 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 .

[0157] Combination Figure 2 , Figures 5 to 7 As shown, the battery device 10 includes a case body 30, a battery cell 21, a heat exchange assembly 40 and at least one fixing member 50. A receiving cavity 31 is formed inside the case body 30. The battery cell 21 is disposed in the receiving cavity 31. The heat exchange assembly 40 is disposed in the receiving cavity 31 and is configured to exchange heat with the battery cell 21. The fixing member 50 is connected to the case body 30. The fixing member 50 and the case body 30 jointly clamp and fix the heat exchange assembly 40.

[0158] The box body 30 includes a support plate 32 and a plurality of side plates 33 at the outer edge of the support plate 32. The support plate 32 and the plurality of side plates 33 enclose a receiving chamber 31. The outer surfaces of the support plate 32 and the plurality of side plates 33 are respectively provided with an impact-resistant layer. The fixing member 50 is connected to the support plate 32, and the heat exchange assembly 40 is sandwiched between the support plate 32 and the fixing member 50. The fixing member 50 includes a first expansion beam 51 and a second expansion beam 52 arranged at intervals along a first direction X, and the first expansion beam 51 and the second expansion beam 52 are arranged in the receiving chamber 31. Along the first direction X, one end of the heat exchange assembly 40 is sandwiched between the first expansion beam 51 and the support plate 32, and the other end of the heat exchange assembly 40 is sandwiched between the second expansion beam 52 and the support plate 32. The first direction X is the length direction of the battery device 10. The fixing member 50 also includes a first lining plate 53 and a second lining plate 54 arranged at intervals along a second direction Y, and the first lining plate 53 and the second lining plate 54 are arranged in the receiving chamber 31. Along the second direction Y, one end of the heat exchange assembly 40 is sandwiched between the first liner plate 53 and the support plate 32 , and the other end of the heat exchange assembly 40 is sandwiched between the second liner plate 54 and the support plate 32 . The second direction Y is the width direction of the battery device 10 .

[0159] Combination Figures 5 to 14As shown, the heat exchange assembly 40 includes a first surface 4111 facing the fixing member 50 and a second surface 4121 facing the support plate 32, wherein a structural adhesive is provided between the first surface 4111 and any one of the first expansion beam 51, the second expansion beam 52, the first lining plate 53 and the second lining plate 54, respectively, and a structural adhesive is provided between the second surface 4121 and the support plate 32. The first surface 4111 of the heat exchange assembly 40 facing the battery cell 21 is also provided with an insulating layer. The heat exchange assembly 40 includes a heat exchange plate 41, and the edge of the heat exchange plate 41 is sandwiched between the support plate 32 and the fixing member 50. A spacing space 38 is formed between part of the heat exchange plate 41 and the support plate 32, and an electrophoresis channel 34 connected to the spacing space 38 is formed between the edge of the heat exchange plate 41 and the support plate 32. An expansion adhesive 60 is provided in the spacing space 38, and the heat exchange plate 41 is connected to the support plate 32 through the expansion adhesive 60. The heat exchange plate 41 includes a first plate portion 411 and a second plate portion 412 connected to each other. The second plate portion 412 is disposed 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 in contact with the first plate portion 411. The first portion 4122 and the first plate portion 411 form a heat exchange flow channel 4124. The surface of the second portion 4123 facing the support plate 32 is connected to the expansion glue 60. At least one side edge of the heat exchange plate 41 is penetrated by a plug hole 413. The support plate 32 is provided with a plug protrusion 35 corresponding to the plug hole 413. The plug protrusion 35 passes through the plug hole 413 and is welded to the fixing member 50. Part of the heat exchange plate 41 is recessed in the direction away from the battery cell 21 and is formed with a mounting groove, and the mounting groove is penetrated by a first mounting hole 414. The fixing member 50 further includes a fixing sheet 55 , a portion of which is disposed in the mounting groove and abuts against the heat exchange plate 41 , and another portion of the fixing sheet 55 passes through the first mounting hole 414 and is connected to the support plate 32 .

[0160] Combination Figures 5 to 8 As shown, the battery device 10 further includes a support beam 70 , 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 .

[0161] 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; A battery cell, wherein the battery cell is disposed in the accommodation cavity; a heat exchange component, the heat exchange component being disposed in the accommodating cavity and configured to exchange heat with the battery cell; At least one fixing member is connected to the box body, and the fixing member and the box body jointly clamp and fix the heat exchange component.

2. The battery device according to claim 1, characterized in that: The box body includes a support plate and a plurality of side plates arranged on the outer edge of the support plate, the support plate and the plurality of side plates together form the accommodating cavity, the fixing member is connected to the support plate and / or the side plate, and the heat exchange component is clamped between the support plate and the fixing member.

3. The battery device according to claim 2, characterized in that: The fixing member includes a first expansion beam and a second expansion beam spaced apart along a first direction, the first expansion beam and the second expansion beam are arranged in the accommodating cavity, along the first direction, one end of the heat exchange component is clamped between the first expansion beam and the support plate, and the other end of the heat exchange component is clamped between the second expansion beam and the support plate, and the first direction is one of the length direction and the width direction of the battery device.

4. The battery device according to claim 3, characterized in that: The fixing member also includes a first lining plate and a second lining plate spaced apart along a second direction, the first lining plate and the second lining plate are arranged in the accommodating cavity, and along the second direction, one end of the heat exchange component is clamped between the first lining plate and the support plate, and the other end of the heat exchange component is clamped between the second lining plate and the support plate, and the second direction is perpendicular to the first direction.

5. The battery device according to claim 2, characterized in that: The heat exchange assembly comprises a first surface facing the fixing member and a second surface facing the support plate, wherein; Structural adhesive is provided between the first surface and the fixing member, and / or structural adhesive is provided between the second surface and the supporting plate.

6. The battery device according to claim 2, characterized in that: The heat exchange assembly comprises a heat exchange plate, and the edge of the heat exchange plate is clamped between the support plate and the fixing member.

7. The battery device according to claim 6, characterized in that: A spacing space is formed between part of the heat exchange plate and the support plate, and an electrophoresis channel connected with the spacing space is formed between the edge of the heat exchange plate and the support plate.

8. The battery device according to claim 7, characterized in that: The spacing space is provided with expansion glue, the curing temperature of the expansion glue is greater than or equal to 150° and less than or equal to 220°, and the heat exchange plate is connected to the support plate through the expansion glue.

9. The battery device according to claim 8, 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.

10. The battery device according to claim 6, characterized in that: At least one side edge of the heat exchange plate is penetrated with a plug hole, and the support plate is provided with a plug protrusion corresponding to the plug hole. The plug protrusion passes through the plug hole and is welded to the fixing member.

11. The battery device according to claim 6, characterized in that: A first mounting hole is penetrated through the portion of the heat exchange plate corresponding to the battery cell, and the fixing member also includes a fixing plate, part of which is arranged on the side of the heat exchange plate facing the battery cell and abuts against the heat exchange plate, and another part of the fixing plate passes through the first mounting hole and is connected to the support plate.

12. The battery device according to claim 11, characterized in that: Part of the heat exchange plate is recessed in a direction away from the battery cell and is formed with a mounting groove, and part of the fixing sheet is arranged in the mounting groove.

13. The battery device according to any one of claims 2 to 12, characterized in that: The battery device further includes a support beam, which is disposed on a side of the heat exchange assembly facing the battery cell and sandwiches the heat exchange assembly together with the support plate.

14. The battery device according to any one of claims 1 to 12, characterized in that: An insulating layer is provided on the surface of the heat exchange assembly facing the battery cell.

15. The battery device according to any one of claims 1 to 12, characterized in that: The outer surface of the box body is provided with an impact-resistant layer.

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

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