Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and the battery device comprises a box body which is provided with a containing cavity; the battery management system is arranged in the containing cavity, the battery management system comprises a box body and a circuit board, a mounting cavity is formed in the box body, the box body is further provided with a mounting part, the mounting part is fixed to the inner wall of the box body, and the circuit board is arranged in the mounting cavity. According to the technical scheme, the circuit board of the battery management system is directly fixed on the inner wall of the box body through the box body, and a BMS bracket is omitted, so that the material cost can be reduced, the production and processing investment can be reduced, the mounting process of the battery device can be simplified, the assembly difficulty can be reduced, and the production efficiency can be improved. In addition, space utilization in the box body can be optimized, heat dissipation is facilitated, the energy density of the battery device is improved, connection points can be reduced to reduce the fault risk, the battery management system operates stably and reliably, and the reliability and stability of the battery device are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and a power utilization device. BACKGROUND

[0002] In electric vehicles and various energy storage devices, the battery management system (Battery Management System, BMS for short) is used to accurately monitor and manage various parameters of the battery device, which plays a crucial role in ensuring the reliable and efficient operation of the battery device. At present, the battery management system is usually integrated by the base, the circuit board and the upper cover, and then installed on the BMS support, and the BMS support is fixed on the expansion beam. However, this assembly structure of the battery management system has many parts, and the assembly difficulty is large, and the assembly efficiency needs to be further improved.

[0003] CONTENT OF THE APPLICATION

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application aims to provide a battery device and a power utilization device comprising the same, which can reduce material cost, simplify the installation process of the battery device, reduce assembly difficulty and improve production efficiency.

[0005] In the first aspect, embodiments of the present application provide a battery device, comprising: a box body having a receiving cavity; a battery management system arranged in the receiving cavity, the battery management system comprising: a box, an installation cavity being arranged inside the box, the box further comprising a mounting portion fixed to an inner wall of the box body; and a circuit board arranged in the installation cavity.

[0006] In the above technical solution, since the circuit board of the battery management system is directly fixed to the inner wall of the box body through the box, the BMS support is cancelled, which not only can reduce material cost and reduce production and processing investment, but also can simplify the installation process of the battery device, reduce assembly difficulty and improve production efficiency. In addition, it can also optimize the space utilization in the box, facilitate heat dissipation, improve the energy density of the battery device, reduce the connection points to reduce the risk of failure, make the battery management system stable and reliable, and improve the reliability and stability of the battery device.

[0007] In some embodiments, the mounting portion comprises a first mounting portion and a second mounting portion, one side edge of the box in the first direction is detachably connected with the side wall of the box body through the first mounting portion, and the other side edge of the box in the first direction is detachably connected with the bottom wall of the box body through the second mounting portion.

[0008] In the technical scheme, the two side edges of the box body in the first direction are detachably connected with the side wall and the bottom wall of the box body through the first mounting part and the second mounting part, which not only facilitates the assembly and disassembly of the base and the box body, facilitates the installation, debugging, maintenance and replacement of the battery management system, improves the assembly and disassembly efficiency, but also stably and reliably fixes the box body on the box body, and ensures the stable operation of the battery management system.

[0009] In some embodiments, the box body comprises a base and a box cover, and the base is detachably connected with the box cover and cooperatively defines the mounting cavity.

[0010] In the technical scheme, the base and the box cover are detachably connected and cooperatively define the mounting cavity, which facilitates the installation of the circuit board in the mounting cavity and facilitates the assembly, maintenance and replacement of the circuit board.

[0011] In some embodiments, the base comprises a main plate part and an extension plate, the main plate part is provided with the first mounting part at one side edge in the first direction, the extension plate is connected at the other side edge of the main plate part in the first direction and extends towards the bottom wall of the accommodating cavity along the second direction, the second mounting part is arranged on the extension plate, and the first direction intersects with the second direction.

[0012] In the technical scheme, the base comprises the main plate part and the extension plate connected in an L shape, and the main plate part and the extension plate are connected with the side wall and the bottom wall of the box body through the first mounting part and the second mounting part, which not only improves the structural strength of the base, but also fully utilizes the right-angle space in the box body, improves the space utilization rate in the box body, and makes the arrangement of parts in the box body more compact.

[0013] In some embodiments, the second mounting part is arranged at one end of the extension plate away from the main plate part in the second direction and extends away from the main plate part in the first direction, the first fixing hole penetrating through the second mounting part in the second direction is formed in the second mounting part, and the second mounting part is connected with the bottom wall of the box body through the first fastener penetrating through the first fixing hole.

[0014] In the technical scheme, the second mounting part is arranged at one end of the extension plate away from the main plate part, and the second mounting part is connected with the bottom wall of the box body, the second mounting part can increase the connection area of the base and the bottom wall of the box body, and the stress transmission between the second mounting part and the bottom wall of the box body is more uniform, thereby effectively reducing the risk of loose connection caused by vibration and bumping and stabilizing the position of the battery management system in the box body.

[0015] In some embodiments, the number of the second mounting parts is multiple, the multiple second mounting parts are arranged in intervals along the third direction, the first fixing hole is formed in each second mounting part, and the third direction intersects with the second direction and the first direction.

[0016] In the technical scheme, the plurality of second mounting portions are arranged at intervals along the third direction, and the first fixing hole is arranged on each second mounting portion, so that the base and the bottom wall of the box are connected more uniformly and stably, the plurality of second mounting portions can jointly disperse stress, reduce local stress, and improve the stability of the battery management system.

[0017] In some embodiments, the connecting position of the main plate portion and the extension plate is formed with a plurality of reinforcing ribs, and the plurality of reinforcing ribs are arranged at intervals along a third direction intersecting the second direction and the first direction.

[0018] In the technical scheme, the plurality of reinforcing ribs arranged at intervals at the connecting position of the main plate portion and the extension plate can significantly enhance the connection strength of the connecting position, and the plurality of reinforcing ribs can effectively disperse stress from different directions, reduce deformation or damage of the connecting position caused by vibration or external force impact, and improve the installation stability of the battery management system.

[0019] In some embodiments, the reinforcing rib is formed by protruding from one side to the other side of the thickness direction of the connecting position of the base.

[0020] In the technical scheme, the reinforcing rib is formed by protruding from one side to the other side of the thickness direction of the connecting position of the base, that is, the reinforcing rib is formed by protruding the base itself, so that no additional components are needed, thereby enhancing the connection strength of the main plate portion and the extension plate without additional weight and cost, and the overall structure of the base is integrated, thereby improving the stability and durability of the base.

[0021] In some embodiments, the battery device further comprises a first support and a high-voltage power distribution element assembly, the first support is fixed to the bottom wall of the box, the high-voltage power distribution element assembly is fixed to the first support, the main plate portion is arranged on the side of the high-voltage power distribution element assembly away from the first support in the second direction, and the extension plate is fixedly connected with the first support, so that the box body is connected to the bottom wall of the box through the first support.

[0022] In the technical scheme, the high-voltage power distribution element assembly is directly fixed to the inner wall of the box through the first support, and the box body of the high-voltage box is cancelled, which can not only reduce material cost and production and processing investment, but also simplify the installation process of the battery device, reduce assembly difficulty, improve production efficiency, improve the energy density of the battery device, reduce the number of connection points to reduce the risk of failure, and improve the reliability and stability of the battery device. The main plate portion and the first support can cooperate to define the arrangement space of the high-voltage power distribution element assembly, so that the overall structure in the battery device is more compact, and the space utilization in the box is improved.

[0023] In some embodiments, the high-voltage power distribution element assembly is arranged on a side of the extension plate facing the main plate portion in the first direction, a plurality of wire harness through holes extending through the extension plate in the first direction are formed on the extension plate, and the wire harness through holes are used for threading the wire harness.

[0024] In the above technical solution, the high-voltage power distribution element assembly is arranged on a side of the extension plate facing the main plate portion in the first direction, which can reduce the mutual interference and influence between the high-voltage power distribution element and other components. The plurality of wire harness through holes extending through the extension plate in the first direction are formed on the extension plate, which can facilitate the wire harness connected with the high-voltage power distribution element assembly to pass through the wire harness through holes and be connected with other components of the battery device, realize orderly wiring, and improve the stability and reliability of power transmission.

[0025] In some embodiments, the first support is a plate member, and a folding edge of the first support is folded towards the bottom wall of the box in the second direction.

[0026] In the above technical solution, the folding edge of the first support is folded towards the bottom wall of the box, which not only improves the overall strength and rigidity of the first support and improves the support stability of the high-voltage power distribution element assembly, but also plays a positioning and guiding role during assembly of the first support, thereby improving the assembly efficiency of the first support.

[0027] In some embodiments, the folding edge adjacent to the side wall of the box is a first folding edge, and a distance between the first folding edge and the adjacent side wall of the box is less than or equal to 10 mm.

[0028] In the above technical solution, the distance between the first folding edge and the inner wall of the box is less than or equal to 10 mm, which can reduce the gap between the first support and the inner wall of the box, maximize the use of the space inside the box, improve the utilization rate of the internal space, provide more arrangement space for the high-voltage power distribution element assembly on the first support, and on the other hand, since the first support, the high-voltage power distribution element assembly, and the battery management system are all fixedly connected to the box through fasteners, it is inevitable that the fasteners will fall off during assembly. By making the distance between the first folding edge and the inner wall of the box less than or equal to 10 mm, the risk of other components (such as smaller fasteners) accidentally falling into the gap can be reduced, and the assembly efficiency can be improved.

[0029] In some embodiments, in the second direction, the distance between the folding edge and the bottom wall of the box is less than or equal to 10 mm.

[0030] In the above technical solution, the distance between the folding edge and the bottom wall of the box in the second direction is less than or equal to 10 mm, which can enhance the connection stability between the first support and the bottom wall of the box, reduce the probability of small foreign objects entering the gap between the bottom of the first support and the bottom wall of the box, and optimize the space layout inside the box and improve the space utilization rate.

[0031] In some embodiments, the first support is provided with a plurality of connecting holes, and the first support is fastened and connected with the bottom wall of the box through the second fastener passing through the connecting holes.

[0032] In the above technical solution, the first support is provided with a plurality of connecting holes, and the first support is fastened and connected with the bottom wall of the box through the second fastener passing through the connecting holes. The plurality of connecting holes can uniformly distribute the fastening force, so that the connection between the first support and the bottom wall of the box is more stable, the probability of deformation or loosening caused by uneven stress is reduced, the support stability of the first support to the high-voltage power distribution element assembly is improved, and stable operation of the battery device is ensured.

[0033] In some embodiments, the first support is a plate member, and the first support is formed with a first boss portion. The first boss portion is formed by a portion of the first support protruding away from the bottom wall of the box in the second direction. The number of the first boss portion is one or a plurality of intervals.

[0034] In the above technical solution, the first support is formed with a first boss portion, and the first boss portion is formed by a portion of the first support protruding away from the bottom wall of the box. This can improve the structural strength of the first support, effectively disperse the stress borne by the first support, reduce the probability of deformation or damage caused by excessive local stress, and also allow precise installation of different parts by adjusting the height and position of the first boss portion, thereby meeting the diversified needs of installation position and height of different parts in the high-voltage power distribution element assembly.

[0035] In some embodiments, the first support is formed with a relief hole penetrating the first support in the second direction. The battery device includes a heat exchange member, and the heat exchange member includes a heat exchange pipe and a pipe joint. The heat exchange pipe is arranged on the side of the first support facing the bottom wall of the box. One end of the pipe joint is connected to the heat exchange pipe, and the other end extends to the side of the first support away from the bottom wall of the box through the relief hole.

[0036] In the above technical solution, the first support is provided with a relief hole for avoiding the pipe joint of the heat exchange member. The relief hole not only facilitates the connection and assembly of the heat exchange pipe with the external pipeline through the pipe joint, improving the assembly efficiency, but also reduces the mutual interference between the heat exchange pipe and the pipe joint and the first support. In addition, the heat exchange pipe can also exchange heat with the high-voltage power distribution element assembly through the first support, improving the operation stability of the high-voltage power distribution element assembly.

[0037] In some embodiments, one side edge of the main plate portion is formed with a folded edge bent in the second direction. The first direction intersects the second direction.

[0038] In the technical scheme, the edge of the main plate part is provided with the turn-up part, the turn-up part can enhance the strength of the base, improve the bearing capacity of the base, and make the base more reliable and less likely to be deformed when fixing the related components of the battery management system. Meanwhile, the turn-up part can be used for precise positioning of the base during installation of the base, improving the installation efficiency of the base. In addition, the turn-up part can also reduce the impact damage of foreign objects on the edge of the base, reduce the risk of damage to the base caused by accidental collision, thereby ensuring the long-term stable operation of the battery device.

[0039] In some embodiments, the base is a plate member, and the base is provided with a second boss part, which is formed by a part of the base protruding away from the circuit board in the thickness direction of the base.

[0040] In the technical scheme, the second boss part is formed on the base and protrudes away from the circuit board, which not only improves the structural strength of the base and reduces the probability of deformation of the base, but also increases the gap between the circuit board and the base, reduces the mutual interference between the base and the circuit board, improves the heat dissipation efficiency of the circuit board, and prolongs the service life of the circuit board.

[0041] In some embodiments, the second boss part defines a groove on the side of the base facing the circuit board, and the circuit board is opposite to the groove and fixed with the periphery of the groove.

[0042] In the technical scheme, the circuit board is fixedly connected with the periphery of the groove, and the periphery of the groove can provide a stable fixing area for the circuit board, so that the circuit board can be accurately positioned and firmly installed, reducing the displacement deviation during installation and improving the structural stability of the battery device. At the same time, since the second boss part defines a groove opposite to the circuit board, the groove not only reduces the risk of direct impact of external objects on the circuit board, but also forms an air flow channel on the base, which is helpful for heat dissipation of the circuit board, ensures efficient work of the circuit board within a normal temperature range, and further improves the overall performance and reliability of the battery device.

[0043] In some embodiments, the base is provided with a first mounting part on one side edge in a first direction, the first mounting part is formed with a second fixing hole penetrating through the first mounting part in a second direction, the first mounting part is connected with the side wall of the box through the second fixing hole by a third fastener, and the first direction intersects with the second direction.

[0044] In the technical scheme, the first mounting portion is arranged on one side edge of the base in the first direction, the first mounting portion is formed with a second fixing hole penetrating in the second direction, and the first mounting portion is connected to the side wall of the box body through the third fastener penetrating the second fixing hole. Thus, the fastening connection between the base and the side wall of the box body can be achieved, the stability and reliability of the base fixed on the box body are improved, the probability of displacement or loosening of the base is reduced, the installation and dismounting of the base are facilitated, and the assembly and maintenance efficiency of the battery device is improved. In addition, the base is connected between the side wall and the bottom wall of the box body, the structural strength of the box body is improved, and the structural strength and stability of the whole battery device are enhanced.

[0045] In some embodiments, the side wall of the box body is provided with a support, the support is provided with a third fixing hole penetrating the support in the second direction, and the third fastener is arranged in the third fixing hole to fix the base on the side wall of the box body through the support.

[0046] In the technical scheme, the support is arranged on the side wall of the box body, and the base is fixed through the third fixing hole and the third fastener. The support can share the weight borne by the base, avoid single-point stress of the base, make the fixing structure of the whole battery management system more firm, enhance the stability of the battery device in operation, and reduce the risk of loosening of components caused by vibration, bumping and the like. Meanwhile, the support can also provide a positioning reference for the installation of the base, facilitate the installation personnel to quickly and accurately fix the base and the side wall of the box body, and improve the installation efficiency. In addition, the fastening connection of the base and the side wall of the box body through the support can also reduce the abrasion or damage to the side wall caused by directly fixing the base on the side wall, and prolong the service life of the box body.

[0047] In some embodiments, the support is L-shaped and includes a connecting portion and a supporting portion connected to each other, the connecting portion is fixed on the side wall of the box body, the supporting portion is plate-shaped and arranged perpendicularly to the second direction, and the third fixing hole is formed on the supporting portion.

[0048] In the technical scheme, the support includes the connecting portion and the supporting portion connected in an L shape. The connecting portion can firmly fix the support on the side wall of the box body, and the third fixing hole connected to the base is formed on the supporting portion. The supporting portion can increase the contact area with the base, improve the reliability of supporting the base, effectively disperse the force borne by the base, and reduce the probability of local stress concentration. The supporting portion can also facilitate the installation and positioning of the base, and improve the assembly efficiency of the battery management system.

[0049] In some embodiments, the number of the first mounting portions is multiple, the multiple first mounting portions are arranged at intervals in a third direction, the number of the supports is multiple, the multiple supports correspond to the multiple first mounting portions one by one, and the third direction intersects with the second direction and the first direction.

[0050] In the technical solution, the first mounting parts are arranged along the third direction and correspond to the support pieces one by one, so that the support pieces are distributed at intervals, can jointly bear the weight of the battery management system, effectively disperse the stress, and improve the support stability of the battery management system.

[0051] In some embodiments, the box cover defines a mounting cavity with an open side, and the base covers the open side of the mounting cavity.

[0052] In the technical solution, the mounting cavity is defined by the box cover and the base, and the circuit board is arranged in the mounting cavity, so that the circuit board can be effectively protected, the erosion of the circuit board by external pollutants such as dust and water vapor is reduced, and the service life of the circuit board is prolonged. The base covers the open side of the mounting cavity and tightly cooperates with the box cover to form a stable protection structure, so as to ensure the stability of the circuit board and other electrical elements arranged inside.

[0053] In some embodiments, the battery management system further comprises a communication module, the communication module is arranged on the box body and located outside the mounting cavity, the communication module is electrically connected with the circuit board, and the communication module is adapted to be in communication connection with the vehicle controller.

[0054] In the technical solution, the communication module is arranged on the box body and located outside the mounting cavity, and the communication module is electrically connected with the circuit board and adapted to be in communication with the vehicle controller, so that not only the electromagnetic interference between the communication module and the circuit board can be reduced, but also the communication between the battery management system and the vehicle controller can be facilitated, the precise regulation and control of the battery device can be realized, and the safe and stable operation of the vehicle can be ensured.

[0055] In a second aspect, the embodiments of the present application provide a power utilization device comprising the battery device according to the first aspect of the present application.

[0056] In the above-mentioned embodiments, by arranging the battery device of the first aspect, the circuit board of the battery management system is directly fixed to the inner wall of the box body through the box body, and the BMS support is cancelled. Not only the material cost and the production and processing investment can be reduced, but also the installation process of the battery device can be simplified, the assembly difficulty can be reduced, the production efficiency can be improved. In addition, the space utilization in the box body can be optimized, heat dissipation is facilitated, the energy density of the battery device is improved, the connection points are reduced to reduce the risk of failure, the battery management system can stably and reliably operate, and the reliability and stability of the battery device are improved, so that the overall performance of the power utilization device is improved.

[0057] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0058] Figure 1 is a structural schematic diagram of a vehicle according to an embodiment of the present application.

[0059] Figure 2 This is a schematic diagram of the structure of a battery device according to an embodiment of this application;

[0060] Figure 3 This is an exploded view of a battery device according to an embodiment of this application;

[0061] Figure 4 This is a schematic diagram of a portion of the structure of a battery device according to an embodiment of this application;

[0062] Figure 5 yes Figure 4 A schematic diagram of the battery device from another angle;

[0063] Figure 6 yes Figure 5 Exploded view of the battery device shown;

[0064] Figure 7 yes Figure 6 A partial enlarged view of the battery device shown;

[0065] Figure 8 This is an exploded view of the battery management system of a battery device according to an embodiment of this application;

[0066] Figure 9 This is a schematic diagram of the base plate and the first bracket of the battery device according to an embodiment of this application;

[0067] Figure 10 This is a schematic diagram of the structure of the base plate, the first bracket, and the high-voltage power distribution component assembly of the battery device according to an embodiment of this application.

[0068] Figure 11 This is a schematic diagram of the structure of the first bracket of the battery device according to an embodiment of this application;

[0069] Figure 12 yes Figure 11 A schematic diagram of the first bracket shown from another angle;

[0070] Figure 13 yes Figure 11 A schematic diagram of the first bracket shown from another angle;

[0071] Figure 14 This is a schematic diagram of the battery management system of a battery device according to an embodiment of this application;

[0072] Figure 15 It is along Figure 14 Sectional view of line AA in the middle;

[0073] Figure 16 It is along Figure 14 Sectional view of the middle BB line;

[0074] Figure 17 is a structural schematic view of a base of a battery management system of a battery device according to an embodiment of the present application;

[0075] Figure 18 is Figure 17 is a schematic view of another angle of the base shown in

[0076] Figure 19 is Figure 17 is a schematic view of still another angle of the base shown in

[0077] Reference signs:

[0078] 1, an electric device;

[0079] 1000, a battery device; 2000, a controller; 3000, a motor;

[0080] 100, a box body; 110, a bottom plate; 120, an upper cover; 130, a support; 131, a connecting portion; 132, a support portion; 1321, a third fixing hole;

[0081] 200, a battery management system; 20a, a box body;

[0082] 210, a base; 211, a main plate portion; 2111, a second fixing hole; 212, an extension plate; 2121, a wire harness through hole;

[0083] 213, a second mounting portion; 2131, a first fixing hole; 218, a first mounting portion;

[0084] 214, a reinforcing rib; 215, a flange; 216, a second boss portion; 217, a groove;

[0085] 220, a circuit board; 230, a box cover; 240, a communication module; 201, a mounting cavity;

[0086] 300, a high-voltage box;

[0087] 310, a first support; 311, a folded edge; 313, a first boss portion; 314, an avoiding hole;

[0088] 320, a high-voltage power distribution element assembly; 321, a relay; 322, a fuse; 323, an electrical connecting piece;

[0089] 400, a heat exchange member; 410, a heat exchange pipe; 420, a pipe joint;

[0090] 500, a battery monomer assembly;

[0091] X, a first direction; Z, a second direction; Y, a third direction. DETAILED DESCRIPTION

[0092] The embodiments of the present application will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore, should not be used to limit the protection scope of the present application.

[0093] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising," "comprises" and "including" as used herein are synonymous with and meant to have the same meaning as the term "including"; the term "comprising" as used herein is meant to be open-ended and include both the recited elements and additional elements not recited.

[0094] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0095] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification indicates that the described features, structures, or characteristics can be included in at least one embodiment of the application. The skilled person explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0096] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0097] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two).

[0098] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship shown in the drawings, which 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 devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0099] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing", and the like should be broadly understood, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0100] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include one or more battery cells, and when there are multiple, the multiple battery cells are connected in series, parallel, or mixed connection through busbar components.

[0101] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0102] In some embodiments, the battery apparatus can be a battery pack, which includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0103] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.

[0104] As an example, the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells in the box body.

[0105] As an example, the box can include a first box and a second box. The first box and the second box are fastened so that an inside of the box forms a closed space to accommodate the battery monomer 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.

[0106] As an example, the box can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively, so that an inside of the box forms a closed space to accommodate the battery monomer assembly.

[0107] As an example, the box can be part of the chassis structure of the vehicle. For example, the top cover of the box can be at least part of the floor of the vehicle, or the frame of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0108] In some embodiments, the battery device refers to an energy storage device, and the energy storage device includes a box, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0109] The battery monomer mentioned in the embodiments of the present application can include a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery or a magnesium ion battery, etc., which is not limited by the embodiments of the present application. The battery monomer can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc., which is also not limited by the embodiments of the present application. The battery monomer is generally divided into three types according to the packaging method: cylindrical battery monomers, square battery monomers and soft package battery monomers, which is also not limited by the embodiments of the present application.

[0110] As an example, the battery monomer can generally include a shell, an electrode assembly and an electrolyte, the shell is used to accommodate the electrode assembly and the electrolyte, and the shell is provided with at least one positive pole and at least one negative pole. The electrode assembly includes one or more electrode assemblies, which are formed by stacking or winding the positive pole sheet, the negative pole sheet and the separator film.

[0111] The battery monomer mainly works by moving metal ions between the positive pole sheet and the negative pole sheet. Taking a lithium ion battery as an example, the material of the positive pole current collector can be aluminum, the material of the positive pole active material layer can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc., the material of the negative pole current collector can be copper, and the material of the negative pole active material layer can be carbon or silicon, etc. During the charging and discharging process, Li+ is embedded and de-embedded between the two electrodes: when charging, Li+ is de-embedded from the positive pole, embedded into the negative pole through the electrolyte, and the negative pole is in a lithium-rich state; when discharging, it is the opposite.

[0112] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery monomers and battery devices, for example, mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc., for example, spacecraft including airplanes, rockets, space shuttles and spacecraft, etc.

[0113] In electric vehicles and various energy storage devices, the battery management system (Battery Management System, BMS for short) is used to accurately monitor and manage various parameters of the battery device, which plays a crucial role in ensuring the reliable and efficient operation of the battery device.

[0114] At present, the battery management system is usually integrated by the base, the circuit board and the upper cover, and then installed on the BMS support, and the BMS support is fixed on the expansion beam. However, for this assembly structure of the battery management system, the BMS support and the base are both fixed structures of the circuit board, which has the phenomenon of repeated functions, not only causing waste of materials and increase of cost, but also possibly causing complexity of installation space layout due to double fixed structures, increasing assembly difficulty and time cost, reducing the energy density of the battery device, and adversely affecting the production efficiency and stability of the entire battery device.

[0115] Based on the above considerations, in order to reduce the cost and reduce the production and assembly difficulty, the present application designs a battery device, the circuit board of the battery management system is directly fixed to the inner wall of the box body through the box body, and the BMS support is cancelled. Not only can reduce the material cost, reduce the production and processing investment, but also can simplify the installation process of the battery device, reduce the assembly difficulty, improve the production efficiency. In addition, it can also optimize the space utilization in the box, which is beneficial to heat dissipation, improves the energy density of the battery device, and also can reduce the connection points to reduce the risk of failure, so that the battery management system can operate stably and reliably, and improve the reliability and stability of the battery device.

[0116] The embodiments of the present application provide a power consumption device using the battery device of the present disclosure as a power supply. The power consumption device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric plane toys, etc., and the spacecraft can include airplanes, rockets, space shuttles and spacecraft, etc.

[0117] The following embodiments take the power consumption device 1 as an example to introduce the structure of the power consumption device 1 and the battery device 1000 in detail.

[0118] Please refer to Figure 1 , Figure 1The power utilization device 1 provided in some embodiments of the present application is a structural schematic diagram of a vehicle. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid automobile or a range extended automobile, etc. The vehicle is provided with a battery device 1000, which can be arranged at the bottom, the head or the tail of the vehicle. The battery device 1000 can be used for power supply of the vehicle, for example, the battery device 1000 can be used as an operating power source of the vehicle. The vehicle can further include a controller 2000 and a motor 3000, and the controller 2000 is used to control the battery device 1000 to supply power to the motor 3000, for example, to meet the power demand of the vehicle during starting, navigation and driving. In some embodiments of the present application, the battery device 1000 can not only be used as an operating power source of the vehicle, but also be used as a driving power source of the vehicle, to replace or partially replace fuel or natural gas to provide driving power for the vehicle.

[0119] Reference will be made to Figures 2-19 The battery device 1000 according to the first aspect of the present application is described.

[0120] Reference will be made to Figure 2 and Figure 3 , Figure 2 The structural schematic diagram of the battery device 1000 provided in some embodiments of the present application is shown in Figure 3 The battery device 1000 according to some embodiments of the present application is shown in an exploded view. The battery device 1000 includes a box body 100 and a plurality of battery monomers, and the box body 100 is used to provide an assembly space for the battery monomers, and the battery monomers are contained in the box body 100. In some examples, the box body 100 includes a bottom plate 110 and an upper cover 120, and the upper cover 120 is arranged on the upper side of the bottom plate 110, and the upper cover 120 cooperates with the bottom plate 110 to define a containing cavity, and the battery monomers are arranged in the containing cavity.

[0121] Reference will be made to Figures 4-7 , Figure 4 The structural schematic diagram of the battery device 1000 according to some embodiments of the present application is shown in Figure 5 The structural schematic diagram of the battery device 1000 shown in Figure 4 is shown in another angle. Figure 6 The exploded view of the battery device 1000 shown in Figure 5 is shown in another angle. Figure 7 The exploded view of the battery device 1000 shown in Figure 6The diagram shows a partial enlarged view of the battery device 1000. The battery device 1000 also includes a battery management system 200 and a high-voltage box 300. A battery cavity and an electrical cavity are formed within the housing 100, arranged along the length of the housing 100. Individual battery cells are located within the battery cavity, while the battery management system 200 and high-voltage box 300 are located within the electrical cavity. The battery device 1000 also includes a heat exchanger 400, which is mounted on the base plate 110 of the housing 100 and used for heat exchange with the individual battery cells. The heat exchanger 400 can also be used for heat exchange with the battery management system 200 and high-voltage box 300.

[0122] Please refer to Figure 8 , Figure 8 This is an exploded view of the battery management system 200 of the battery device 1000 according to an embodiment of this application; the battery management system 200 includes a base 210, a circuit board 220, a cover 230 and a communication module 240. The cover 230 cooperates with the base 210 to define a mounting cavity 201. The circuit board 220 is disposed in the mounting cavity 201, and the communication module 240 is fixed on the base 210.

[0123] Figure 9 This is a schematic diagram of the base plate 110 and the first bracket 310 of the battery device 1000 according to an embodiment of this application. Figure 10 This is a schematic diagram of the structure of the base plate 110, the first bracket 310, and the high-voltage power distribution component assembly 320 of the battery device 1000 according to an embodiment of this application. Figure 11 This is a schematic diagram of the structure of the first support 310 of the battery device 1000 according to an embodiment of this application; Figure 12 yes Figure 11 A schematic diagram of the first bracket 310 shown from another angle; Figure 13 yes Figure 11 A schematic diagram of the first bracket 310 at another angle. Figure 14 This is a schematic diagram of the battery management system 200 of the battery device 1000 according to an embodiment of this application; Figure 15 It is along Figure 14 Sectional view of line AA in the middle; Figure 16 It is along Figure 14 Sectional view of the middle BB line; Figure 17 This is a schematic diagram of the structure of the base 210 of the battery management system 200 of the battery device 1000 according to an embodiment of this application; Figure 18 yes Figure 17 A schematic diagram of the base 210 from another angle; Figure 19 yes Figure 17 A schematic diagram of the base 210 at another angle.

[0124] This application provides a battery device 1000, such as...Figures 6-8 As shown, the battery device 1000 comprises a box body 100 and a battery management system 200, the box body 100 has a containing cavity, and the battery management system 200 is arranged in the containing cavity and comprises a box 20a and a circuit board 220, the box 20a is internally provided with a mounting cavity 201, and the box 20a is further provided with a mounting portion, and a base 210 of the mounting portion is fixed to an inner wall of the box body 100.

[0125] The box body 100 is internally provided with a partition beam, the partition beam divides the containing cavity into a battery cavity and an electrical cavity, and the battery management system 200 is arranged in the electrical cavity.

[0126] In some examples, the circuit board 220 can be fixed to the base 210 in a manner of clamping, welding, bonding and / or fastener connection.

[0127] In some examples, the box 20a can be fixed to the inner wall of the box body 100 in a manner of clamping, welding, bonding and / or fastener connection. The inner wall of the box body 100 comprises a top wall, a bottom wall and side walls of the box body 100.

[0128] It should be noted that in the prior art, the circuit board 220 of the battery management system 200 is fixed to the base 210, and the base 210 is further fixed to the expansion beam through a BMS support to achieve fixed installation of the battery management system 200, wherein the base 210 and the BMS support are both used for fixing the circuit board 220, and the functions are repeated.

[0129] In the embodiment, the circuit board 220 of the battery management system 200 is directly fixed to the inner wall of the box body 100 through the box 20a, that is, the battery device 1000 cancels the BMS support, thereby not only reducing material waste caused by repeated functions of the BMS support and the box 20a, reducing the material cost of the battery device 1000, but also reducing the number of parts of the battery device 1000, simplifying the installation structure of the battery device 1000, making the overall layout of the battery device 1000 more concise, reducing the assembly difficulty and improving the production efficiency. In addition, since one fixing structure is reduced, the space occupation of the part is reduced, thereby the space layout in the box body 100 can be further optimized, a larger arrangement space can be provided for other components in the battery device 1000, and the energy density of the battery device 1000 is improved. At the same time, the circuit board 220 is directly fixed to the inner wall of the box body 100 through the box 20a, which can also reduce the probability of problems such as looseness and failure caused by multiple component connections, so that the battery management system 200 can more reliably monitor and manage the battery device 1000, and the battery device 1000 can reliably and efficiently operate.

[0130] In the technical solution, the circuit board 220 of the battery management system 200 is directly fixed to the inner wall of the box body 100 through the box body 20a, the BMS support is cancelled, the material cost can be reduced, the production and processing investment can be reduced, the installation process of the battery device 1000 can be simplified, the assembly difficulty can be reduced, the production efficiency can be improved, the space utilization in the box body 100 can be optimized, the heat dissipation is facilitated, the energy density of the battery device 1000 is improved, the connection points can be reduced to reduce the failure risk, the battery management system 200 can be stably and reliably operated, and the reliability and stability of the battery device 1000 are improved.

[0131] In some embodiments of the present application, as shown in Figure 7 and Figure 8 , the mounting portion includes a first mounting portion 218 and a second mounting portion 213, one side edge of the box body 20a in the first direction X is detachably connected with the side wall of the box body 100 through the first mounting portion 218, and the other side edge of the box body 20a in the first direction X is detachably connected with the bottom wall of the box body 100 through the second mounting portion.

[0132] In some examples, the number of mounting portions can be multiple, for example, the number of mounting portions can be two, three, four, five, six, seven, eight, nine, ten or more, etc. A part of the plurality of mounting portions is formed as the first mounting portion 218, and another part of the plurality of mounting portions is formed as the second mounting portion 213, and the box body 20a is fixed to the inner wall of the box body 100 through the first mounting portion 218 and the second mounting portion 213. Thus, the connection reliability of the box body 20a and the box body 100 can be improved.

[0133] In some examples, the first direction X is the length direction of the box body 100, the third direction Y is the width direction of the box body 100, the box body 20a extends along the third direction Y, and the two sides of the box body 20a in the first direction X are connected with the side wall and the bottom wall of the box body 100, respectively.

[0134] In some examples, the first direction X is the front-rear direction, the front side edge of the box body 20a can be detachably connected with the front side wall of the box body 100, for example, the front side edge of the box body 20a is bolted, clamped or magnetically connected with the front side wall of the box body 100, etc., and the rear side edge of the box body 20a can be detachably connected with the bottom wall of the box body 100, for example, the rear side edge of the box body 20a is bolted, clamped or magnetically connected with the bottom wall of the box body 100, etc.

[0135] In the technical solution, the two side edges of the box body 20a in the first direction X are detachably connected with the side wall and the bottom wall of the box body 100 through the first mounting part 218 and the second mounting part 213, respectively. This not only facilitates the assembly and disassembly of the base 210 and the box body 100, facilitates the installation, debugging, maintenance and replacement of the battery management system 200, and improves the assembly and disassembly efficiency, but also stably and reliably fixes the box body 20a on the box body 100, and ensures the stable operation of the battery management system 200.

[0136] In some embodiments of the present application, as shown in Figure 7 and Figure 8 The box body 20a includes a base 210 and a box cover 230, and the base 210 and the box cover 230 are detachably connected and cooperatively define the mounting cavity 201.

[0137] In some examples, the base 210 can define the mounting cavity 201 with one side open, and the box cover 230 covers the open side of the base 210. In other examples, the box cover 230 defines the mounting cavity 201 with one side open, and the base 210 covers the open side of the box cover 230. In yet other examples, the base 210 and the box cover 230 each define a slot structure with opposite openings, and the base 210 and the box cover 230 are mutually buckled and cooperatively define the mounting cavity 201.

[0138] In some embodiments, the box cover 230 is detachably connected with the base 210. In some examples, the base 210 and the box cover 230 can be connected by clamping, riveting, magnetic attraction and / or fastener connection, and the circuit board 220 is arranged in the mounting cavity 201.

[0139] Specifically, the box cover 230 and the base 210 can be fastened and connected by fasteners. For example, the box cover 230 is formed with a first hole penetrating the box cover 230 in the second direction Z, the circuit board 220 is formed with a second hole penetrating the circuit board 220 in the second direction Z, and the base 210 is formed with a third hole penetrating the base 210 in the second direction Z, the first hole, the second hole and the third hole correspond one by one and are opposite in the second direction Z, and the battery management system 200 further includes: a fourth fastener, the fourth fastener passes through the third hole, the second hole and the first hole in sequence, and realizes the fastened connection of the base 210, the circuit board 220 and the box cover 230.

[0140] In some embodiments, the side wall of the box cover 230 is formed with a plurality of plug-in holes penetrating the side wall of the box cover 230, the plurality of plug-in holes are arranged at intervals along the circumference of the box cover 230, the circuit board 220 is provided with a plurality of plug-in terminals, the plug-in terminals are exposed at the positions of the plug-in holes, and the plug-in ends of the external wiring harness can be plugged and connected with the plug-in terminals at the positions of the plug-in holes to realize the electrical connection between the circuit board 220 and the external electrical elements. Further, the plurality of plug-in holes are formed in the rear side wall of the box cover 230.

[0141] In the above technical solution, by detachably connecting the base 210 and the box cover 230 and cooperating to define the mounting cavity 201, the circuit board 220 can be conveniently mounted in the mounting cavity 201, and the circuit board 220 is convenient to assemble, disassemble, maintain and replace.

[0142] In some embodiments of the present application, as shown in Figure 7 and Figure 8 The base 210 includes a main plate portion 211 and an extension plate 212. The main plate portion 211 is provided with a first mounting portion 218 on one side edge in the first direction X. The extension plate 212 is connected to the other side edge of the main plate portion 211 in the first direction X and extends toward the bottom wall of the accommodating cavity along the second direction Z. The extension plate 212 is provided with a second mounting portion 213. The first direction X intersects the second direction Z.

[0143] In some examples, the main plate portion 211 is in the shape of a plate body perpendicular to the second direction Z. The width direction of the main plate portion 211 is along the first direction X and the length direction is along the third direction Y. Further, the first direction X is the front-rear direction. The front side edge of the main plate portion 211 can be formed with the first mounting portion 218. The first mounting portion 218 on the main plate portion 211 can be directly fixedly connected with the front side wall of the cabinet 100 through fasteners such as bolts.

[0144] In some specific examples, the first mounting portion 218 can be formed as a connecting edge connected to the front side edge of the main plate portion 211 and bent along the second direction Z. The connecting edge is formed with a second fixing hole 2111 penetrating the connecting edge along the first direction X. The fastener passes through the second fixing hole 2111 on the connecting edge and is connected with the side wall of the cabinet 100.

[0145] In some specific examples, the front side wall of the cabinet 100 can be formed with a support portion 132 extending toward the base 210. The support portion 132 is in the shape of a plate body perpendicular to the second direction Z. The support portion 132 is formed with a third fixing hole 1321 penetrating the support portion 132 along the second direction Z. The first mounting portion 218 connected to the front side edge of the main plate portion 211 is formed with a second fixing hole 2111 penetrating the first mounting portion 218 along the second direction Z. The fastener passes through the support portion 132 and the first mounting portion 218 to achieve fastening connection of the main plate portion 211 and the support portion 132.

[0146] In some examples, the first direction X intersects the second direction Z, indicating that the first direction X is not parallel to the second direction Z, and the first direction X and the second direction Z are arranged at an angle. For example, the angle between the first direction X and the second direction Z can be 30°, 45°, 60°, 80° or 90°, etc. In some specific examples, the first direction X and the second direction Z are perpendicular to each other.

[0147] In some examples, the first direction X is the length direction of the box 100, and is also the front-rear direction of the electric device 1, the second direction Z is the height direction of the box 100, and is also the up-down direction of the electric device 1, and the third direction Y is the width direction of the box 100, and is also the left-right direction of the electric device 1.

[0148] In some examples, the main plate part 211 is connected perpendicularly to the extension plate 212 and has an L shape, so as to improve the structural strength of the base 210. Meanwhile, the front side edge of the main plate part 211 is connected to the front side wall of the box 100 through the first mounting part 218, and the lower end of the extension plate 212 is connected to the bottom wall of the box 100 through the second mounting part 213. In this way, the L-shaped base 210 can be fixedly connected to the bottom wall and the side wall of the box 100 to form a stable support structure, so as to improve the stability of the support for the battery management system 200. Further, the L-shaped base 210 can cooperate with the corner position of the box 100 to define a layout space on the lower side of the main plate part 211. The layout space can be used to arrange the high-voltage power distribution element assembly 320 described below, or can be used to avoid other components in the layout space. In this way, the right-angle space in the box 100 can be fully utilized, and the space utilization in the box 100 is further improved, so that the components in the box 100 are arranged more compactly, and the energy density of the battery device 1000 is improved.

[0149] In the above technical solution, the base 210 includes the main plate part 211 and the extension plate 212 connected in an L shape. The main plate part 211 and the extension plate 212 are connected to the side wall and the bottom wall of the box 100 through the first mounting part 218 and the second mounting part 213, respectively. This not only improves the structural strength of the base 210, but also fully utilizes the right-angle space in the box 100, and improves the space utilization in the box 100, so that the components in the box 100 are arranged more compactly.

[0150] In some embodiments of the present application, as shown in Figure 7 and Figure 8 The second mounting part 213 is arranged at one end of the extension plate 212 away from the main plate part 211 in the second direction Z and extends away from the main plate part 211 in the first direction X. The second mounting part 213 is formed with a first fixing hole 2131 penetrating the second mounting part 213 in the second direction Z. The second mounting part 213 is connected to the bottom wall of the box 100 through the first fixing hole 2131 by the first fastener.

[0151] In some examples, the second mounting portion 213 includes a first protruding edge and a second protruding edge, one end of the first protruding edge is connected to the side edge of the extension plate 212 away from the main plate portion 211, the other end of the first protruding edge extends away from the extension plate 212 in the second direction Z, the second protruding edge is connected to the lower end of the first protruding edge and extends away from the main plate portion 211 in the first direction X, and the first fixing hole 2131 penetrates through the second protruding edge in the second direction Z. At this time, the second mounting portion 213 is in an L shape, and thus the second protruding edge can increase the contact area with the bottom wall of the box body 100, uniformly disperse stress, and thus can enhance the connection stability between the second mounting portion 213 and the bottom wall of the box body 100.

[0152] In some examples, the first protruding edge is in a flat plate shape perpendicular to the first direction X, and the two side edges of the first protruding edge in the third direction Y are connected to the edge arc of the extension plate 212 away from the main plate portion 211. Thus, the connection position of the extension plate 212 and the first protruding edge can be more smoothly transitioned, stress concentration can be reduced, and structural stability can be enhanced.

[0153] Further, the second protruding edge is in a flat plate shape perpendicular to the second direction Z, and the first protruding edge is connected to the second protruding edge in an arc shape. Thus, by the arc connection, stress can be effectively dispersed, stress concentration can be reduced, the overall structural strength of the second mounting portion 213 can be enhanced, in addition, the second protruding edge is in a flat plate shape, which can facilitate the installation and fixation between the second mounting portion 213 and the bottom wall of the box body 100, and improve the stability of the connection between the battery management system 200 and the box body 100.

[0154] In the above technical solution, the second mounting portion 213 is arranged at one end of the extension plate 212 away from the main plate portion 211, and is connected to the bottom wall of the box body 100 through the second mounting portion 213. The second mounting portion 213 can increase the connection area between the base 210 and the bottom wall of the box body 100, and make the force transmission between the second mounting portion 213 and the bottom wall of the box body 100 more uniform. Thus, the risk of connection loosening caused by vibration and bumping can be effectively reduced, and the position of the battery management system 200 in the box body 100 can be stabilized.

[0155] In some embodiments of the present application, as shown in Figure 7 and Figure 8 the number of the second mounting portions 213 is multiple, the multiple second mounting portions 213 are arranged at intervals in the third direction Y, the first fixing hole 2131 is formed on each second mounting portion 213, and the third direction Y intersects with the second direction Z and the first direction X.

[0156] In some examples, the number of the second mounting portions 213 can be two, three, four, five, six, seven, eight, ten, fifteen or more, etc. In this way, the number of the second mounting portions 213 can be set according to the length of the base 210, the connection stability between the base 210 and the bottom wall of the box body 100 can be improved, the stress can be uniformly dispersed, and the connection reliability between the battery management system 200 and the box body 100 can be improved.

[0157] In some examples, one or more first fixing holes 2131 can be formed on each second mounting portion 213. When a plurality of first fixing holes 2131 are arranged on one second mounting portion 213, the plurality of first fixing holes 2131 can be arranged along the third direction Y.

[0158] In the above technical solution, the plurality of second mounting portions 213 are arranged at intervals along the third direction Y, and the first fixing hole 2131 is arranged on each second mounting portion 213. The connection between the base 210 and the bottom wall of the box body 100 can be more uniform and stable, the plurality of second mounting portions 213 can jointly disperse the stress, reduce the local stress, and improve the stability of the battery management system 200.

[0159] In some embodiments of the present application, as shown in Figure 7 and Figure 8 , the connection position of the main plate portion 211 and the extension plate 212 is formed with a reinforcing rib 214. The number of the reinforcing ribs 214 is a plurality, and the plurality of reinforcing ribs 214 are arranged at intervals along the third direction Y. The third direction Y intersects the second direction Z and the first direction X.

[0160] In some examples, the number of the reinforcing ribs 214 can be two, three, four, five, six, seven, eight, ten, fifteen or more, etc. The plurality of reinforcing ribs 214 can be uniformly or non-uniformly arranged at intervals along the third direction Y.

[0161] In some examples, the reinforcing rib 214 can be formed as a reinforcing plate or a reinforcing block. The reinforcing plate or the reinforcing block can be connected between the main plate portion 211 and the extension plate 212. In this way, the connection strength between the extension plate 212 and the main plate portion 211 can be further improved.

[0162] In some examples, the main plate portion 211 and the extension plate 212 are integrally formed and connected in a circular arc. In this way, the stress concentration at the connection position of the main plate portion 211 and the extension plate 212 can be reduced, and the structural strength and service life of the connection position can be improved.

[0163] In the technical solution, the plurality of reinforcing ribs 214 arranged at intervals are arranged at the connection position of the main plate part 211 and the extension plate 212, which can significantly increase the connection strength of the connection position of the main plate part 211 and the extension plate 212. In addition, the plurality of reinforcing ribs 214 are distributed along the third direction Y, which can effectively disperse stress from different directions, reduce deformation or damage of the connection position caused by vibration or external force impact, and improve the installation stability of the battery management system 200.

[0164] In some embodiments of the present application, as shown in Figure 7 and Figure 8 the reinforcing rib 214 is formed by protruding from one side of the thickness direction of the base 210 to the other side at the connection position.

[0165] In some examples, the main plate part 211 and the extension plate 212 are connected in an L shape, the main plate part 211, the extension plate 212, and the bottom wall and the side wall of the box body 100 cooperatively define a layout space, the reinforcing rib 214 is formed at the connection position of the main plate part 211 and the extension plate 212, and the reinforcing rib 214 is formed by protruding from one side of the thickness direction of the base 210 to the other side at the connection position.

[0166] In the technical solution, the reinforcing rib 214 is formed by protruding from one side of the thickness direction of the base 210 to the other side at the connection position, that is, the reinforcing rib 214 is formed by protruding from the base 210 itself, which does not need to add additional components, thereby increasing the connection strength of the main plate part 211 and the extension plate 212 without increasing the weight and cost, and also integrating the overall structure of the base 210 to improve the stability and durability of the base 210.

[0167] In some embodiments of the present application, as shown in Figures 7-10 the battery device 1000 further includes a first support 310 and a high-voltage power distribution element assembly 320, the first support 310 is fixed to the bottom wall of the box body 100, the high-voltage power distribution element assembly 320 is fixed to the first support 310, the main plate part 211 is arranged on the side of the high-voltage power distribution element assembly 320 away from the first support 310 in the second direction Z, and the extension plate 212 is fixedly connected with the first support 310, so that the box body 20a is connected to the bottom wall of the box body 100 through the first support 310.

[0168] In some examples, the bottom wall of the box body 100, the first support 310, the high-voltage power distribution element assembly 320, and the main plate part 211 are arranged in the second direction Z in sequence. In this way, a compact structure can be achieved, and the space occupation can be reduced.

[0169] In some examples, as shown in Figure 7As shown, the high-voltage power distribution element assembly 320 includes: a plurality of relays 321 and a fuse 322 connected by an electrical connector 323, wherein the number of relays 321 is multiple, and the multiple relays 321 are arranged in the third direction Y at intervals, and the number of fuses 322 is one or more. Further, the multiple relays 321 and the fuse 322 are connected by the electrical connector 323, wherein the electrical connector 323 is a copper bar. Among them, the relay 321 can accurately control the on-off of the circuit, realize the reasonable distribution of high-voltage electricity; the fuse 322 rapidly melts and cuts off the circuit when the current is abnormal, reduces the probability of safety accidents such as short circuit and fire caused by overload, and ensures the stable and reliable operation of the battery system.

[0170] In the embodiment, the high-voltage power distribution element assembly 320 and the first support 310 constitute the high-voltage box 300 of the battery device 1000, that is, the high-voltage box 300 of the battery device 1000 includes the first support 310 and the high-voltage power distribution element assembly 320 arranged on the first support 310.

[0171] It should be noted that in the prior art, the high-voltage box 300 has a box body and high-voltage matching elements, and the high-voltage power distribution elements are arranged in the box body, and the box body is fixed to the inner wall of the box body 100 by the high-voltage power distribution box support. The box body and the high-voltage power distribution box support are both mounting and fixing structures of the high-voltage power distribution elements, and the functions are repeated.

[0172] In the embodiment, the high-voltage power distribution element assembly 320 of the high-voltage box 300 is directly fixed to the inner wall of the box body 100 through the first support 310, that is, the battery device 1000 cancels the box body of the high-voltage box 300, thereby not only reducing the material waste caused by the repeated functions of the high-voltage power distribution box support and the box body of the high-voltage box 300, reducing the material cost of the battery device 1000, but also reducing the number of parts of the battery device 1000, simplifying the installation structure and installation process of the battery device 1000, making the overall layout of the battery device 1000 more concise, reducing the assembly difficulty, and improving the production efficiency.

[0173] In addition, since one fixing structure (the box body of the high-voltage box 300) is reduced, the space occupied by the part is reduced, thereby the space layout in the box body 100 can be further optimized, and more arrangement space can be provided for other parts in the battery device 1000, thereby improving the energy density of the battery device 1000. At the same time, the high-voltage power distribution element assembly 320 is directly fixed to the inner wall of the box body 100 through the first support 310, which can also reduce the probability of problems such as looseness and failure caused by the connection of multiple components, so that the battery management system 200 can more reliably monitor and manage the battery device 1000, and the battery device 1000 can operate reliably and efficiently.

[0174] In the embodiment, the main plate part 211 is arranged on the side of the high-voltage power distribution element assembly 320 away from the first support 310 in the second direction Z, that is, the first support 310 and the main plate part 211 are arranged on the two sides of the high-voltage power distribution element assembly 320 in the second direction Z, and at this time, the main plate part 211 cooperates with the first support 310 to define a layout space for arranging the high-voltage power distribution element assembly 320, and the high-voltage power distribution element assembly 320 is arranged in the layout space. Therefore, the main plate part 211 can play a role of isolating the circuit board 220 and the high-voltage power distribution element assembly 320, reducing the mutual interference between the circuit board 220 and the high-voltage power distribution element assembly 320, and at the same time, the main plate part 211 and the first support 310 can cooperate to define a dedicated layout space for the high-voltage power distribution element assembly 320, so that the overall structure in the battery device 1000 is more compact, the space utilization in the box 100 is improved, and the overall integration between the battery management system 200 and the high-voltage box 300 is improved.

[0175] In the embodiment, the extension plate 212 is fixedly connected with the first support 310, so that the box body 20a is connected to the bottom wall of the box 100 through the first support 310. In other words, the circuit board 220 is fixed in the box body 20a, the box body 20a is fixed through the extension plate 212 of the base 210 and the first support 310, and the first support 310 is fixed to the bottom wall of the box 100. Therefore, the battery management system 200 is indirectly fixed to the bottom wall of the box 100 through the first support 310, the reliability of the connection is improved, and the structural layout is more compact.

[0176] In the above technical solution, the high-voltage power distribution element assembly 320 is directly fixed to the inner wall of the box 100 through the first support 310, and the box body of the high-voltage box 300 is cancelled. Not only can the material cost be reduced, the production and processing investment can be reduced, the installation process of the battery device 1000 can be simplified, the assembly difficulty can be reduced, the production efficiency can be improved, the energy density of the battery device 1000 can be improved, the connection points can be reduced to reduce the risk of failure, and the reliability and stability of the battery device 1000 can be improved. The main plate part 211 and the first support 310 can cooperate to define a layout space for the high-voltage power distribution element assembly 320, so that the overall structure in the battery device 1000 is more compact, and the space utilization in the box 100 is improved.

[0177] In some embodiments of the present application, as shown in Figure 7 and Figure 8 , the high-voltage power distribution element assembly 320 is arranged on the side of the extension plate 212 facing the main plate part 211 in the first direction X, a plurality of wire harness through holes 2121 extending through the extension plate 212 in the first direction X are formed on the extension plate 212, and the wire harness through holes 2121 are used to pass the wire harness.

[0178] That is, the extension plate 212, the first support 310 and the side wall of the main plate part 211 and the box body 100 cooperatively enclose a layout space in which the high-voltage power distribution element assembly 320 is arranged, so that the mutual interference and influence between the high-voltage power distribution element and other components can be reduced, and the operation stability of the high-voltage power distribution element assembly 320 and other electrical elements in the box body 100 can be improved.

[0179] In some examples, the extension plate 212 can be provided with two, three, four, six, eight, ten, fifteen, twenty or more wire harness through holes 2121, and the plurality of wire harness through holes 2121 can be arranged at intervals along the third direction Y and / or the second direction Z. The wire harness through hole 2121 communicates the space on both sides of the extension plate 212 in the thickness direction, and the wire harness connected to the battery monomer or other electrical elements can pass through the wire harness through hole 2121 and be connected to each element (such as the relay 321 and the fuse 322) of the high-voltage power distribution element assembly 320, so as to realize orderly wiring, reduce the risk of line wear, short circuit and other faults, and ensure the stability and reliability of power transmission.

[0180] In the above technical solution, the high-voltage power distribution element assembly 320 is arranged on the side of the extension plate 212 facing the main plate part 211 in the first direction X, so that the mutual interference and influence between the high-voltage power distribution element and other components can be reduced, and the plurality of wire harness through holes 2121 formed in the extension plate 212 and extending through the extension plate 212 in the first direction X can facilitate the wire harness connected to the high-voltage power distribution element assembly 320 to pass through the wire harness through hole 2121 and be connected to other components of the battery device 1000, so as to realize orderly wiring, improve the stability and reliability of power transmission.

[0181] In some embodiments of the present application, as shown in Figure 7 and Figure 9 The first support 310 is a plate member, and the periphery of the first support 310 is provided with a folded edge 311 folded towards the bottom wall of the box body 100 in the second direction Z.

[0182] In some examples, the first direction X is set as the front-rear direction, the second direction Z is set as the up-down direction, and the third direction Y is set as the left-right direction. The first support 310 is generally in the shape of a rectangular plate body. The thickness direction of the first support 310 is along the second direction Z. The front side edge, the rear side edge, the left side edge, and the right side edge of the first support 310 are each provided with a folded edge 311. The folded edge 311 can extend in a ring shape along the circumference of the first support 310. The circumference of the first support 310 can also be provided with a plurality of folded edges 311. The plurality of folded edges 311 can be arranged at intervals along the circumference of the first support 310. Specifically, the rear side edge of the first support 310 can be provided with two folded edges 311 arranged at intervals. The front side edge of the first support 310 can be provided with three folded edges 311 arranged at intervals. The left side edge and the right side edge of the first support 310 can each be provided with one folded edge 311.

[0183] In the present embodiment, the folded edges 311 are arranged along the circumference of the first support 310. The folded edges 311 can effectively improve the overall strength and rigidity of the first support 310, so that the first support 310 is more stable when supporting the high-voltage power distribution element assembly 320 and is less likely to deform. At the same time, the folded edges 311 can play a positioning and guiding role when the first support 310 is installed with the cabinet 100, so that the installer can quickly and accurately fix the first support 310 to the bottom wall of the cabinet 100, thereby improving the installation efficiency. In addition, since the folded edges 311 are folded towards the bottom wall of the cabinet 100, the folded edges 311 can reduce the gap between the first support 310 and the bottom wall of the cabinet 100, thereby reducing the risk that small parts falling during installation will roll into the gap between the bottom wall and the first support 310 and cannot be taken out, thereby improving the assembly efficiency.

[0184] In the above technical solution, the folded edges 311 are arranged along the circumference of the first support 310 and are folded towards the bottom wall of the cabinet 100. The folded edges 311 not only improve the overall strength and rigidity of the first support 310 and improve the stability of supporting the high-voltage power distribution element assembly 320, but also play a positioning and guiding role when the first support 310 is assembled, thereby improving the assembly efficiency of the first support 310.

[0185] In some embodiments of the present application, as shown in Figure 7 and Figure 9 The folded edge 311 adjacent to the side wall of the cabinet 100 is a first folded edge 311. The distance between the first folded edge 311 and the adjacent side wall of the cabinet 100 is less than or equal to 10 mm.

[0186] For example, the first direction X is set as the front-rear direction, the third direction Y is set as the left-right direction, the folded edge 311 of the left side edge of the first support 310 is the first folded edge 311, and the distance between the first folded edge 311 of the left side edge of the first support 310 and the left side wall of the box body 100 in the left-right direction is less than or equal to 10 mm. Specifically, the distance between the first folded edge 311 of the left side edge of the first support 310 and the left side wall of the box body 100 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0187] The folded edge 311 of the right side edge of the first support 310 is the first folded edge 311, and the distance between the first folded edge 311 of the right side edge of the first support 310 and the right side wall of the box body 100 in the left-right direction is less than or equal to 10 mm. Specifically, the distance between the first folded edge 311 of the right side edge of the first support 310 and the right side wall of the box body 100 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0188] Further, the folded edge 311 of the front side edge of the first support 310 is the first folded edge 311, and the distance between the first folded edge 311 of the front side edge of the first support 310 and the front side wall of the box body 100 is less than or equal to 10 mm. Specifically, the distance between the first folded edge 311 of the front side edge of the first support 310 and the front side wall of the box body 100 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0189] In the above technical solution, the distance between the first folded edge 311 and the inner wall of the box body 100 is less than or equal to 10 mm, which can reduce the gap between the first support 310 and the inner wall of the box body 100, maximize the use of the space inside the box body 100, improve the utilization rate of the internal space, and provide more space for the high-voltage power distribution element assembly 320 on the first support 310. On the other hand, since the first support 310, the high-voltage power distribution element assembly 320, and the battery management system 200 are all fixedly connected to the box body 100 by fasteners, it is inevitable that the fasteners will fall off during assembly. By setting the distance between the first folded edge 311 and the inner wall of the box body 100 to be less than or equal to 10 mm, the risk of other components (such as smaller fasteners) accidentally falling into the gap can be reduced, and the assembly efficiency can be improved.

[0190] In some embodiments of the present application, as shown in Figure 7 and Figure 9 In the second direction Z, the distance between the folded edge 311 and the bottom wall of the box body 100 is less than or equal to 10 mm.

[0191] For example, the second direction Z is the up-down direction, the first support 310 is arranged on the upper side of the bottom wall of the box body 100, and the spacing between the lower end of the folded edge 311 and the bottom wall of the box body 100 in the up-down direction is less than or equal to 10 mm. Specifically, the spacing between the lower end of the folded edge 311 and the bottom wall of the box body 100 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0192] In this embodiment, the spacing between the folded edge 311 and the bottom wall of the box body 100 in the second direction Z is less than or equal to 10 mm. A smaller spacing can form a more compact connection structure between the first support 310 and the bottom wall of the box body 100, effectively enhancing the overall stability and reducing the probability of displacement or loosening of the first support 310 due to factors such as vibration. At the same time, a smaller spacing can reduce the probability of small foreign objects entering the gap between the bottom of the first support 310 and the bottom wall of the box body 100, reducing the risk of damage to internal circuits or other components caused by foreign objects, and reducing the probability of failure. In addition, a smaller spacing helps to optimize the spatial layout within the box body 100 and improve the space utilization of the battery device 1000.

[0193] In the above technical solution, the spacing between the folded edge 311 and the bottom wall of the box body 100 in the second direction Z is less than or equal to 10 mm, which can enhance the connection stability between the first support 310 and the bottom wall of the box body 100, reduce the probability of small foreign objects entering the gap between the bottom of the first support 310 and the bottom wall of the box body 100, and optimize the spatial layout within the box body 100 and improve the space utilization.

[0194] In some embodiments of the present application, as shown in Figure 7 , Figures 11-13 A plurality of connection holes are formed on the first support 310, and the first support 310 is fastened and connected to the bottom wall of the box body 100 through the second fastener passing through the connection holes.

[0195] For example, a plurality of connection holes are formed on the first support 310 and pass through the first support 310 in the second direction Z, and the plurality of connection holes are arranged at intervals along the circumference of the first support 310. The number of connection holes on the first support 310 can be two, four, six, eight, ten, twelve, fifteen or more, etc.

[0196] In some examples, the first support 310 can be fastened to the bottom wall of the box body 100 through the second fastener passing through the connecting hole. In other examples, a partition beam can be arranged on the bottom wall of the box body 100, the partition beam extending along the third direction Y, and the first support 310 can also be fastened to the partition beam arranged on the bottom wall of the box body 100 through the second fastener passing through the connecting hole. Of course, the first support 310 can be fastened to the bottom wall of the box body 100 through the second fastener passing through a part of the connecting hole, and also fastened to the partition beam on the bottom wall of the box body 100 through the second fastener passing through another part of the connecting hole.

[0197] In the above technical solution, the first support 310 is provided with multiple connecting holes, and is fastened to the bottom wall of the box body 100 through the second fastener passing through the connecting hole. The multiple connecting holes can uniformly distribute the fastening force, so that the connection between the first support 310 and the bottom wall of the box body 100 is more stable, the probability of deformation or loosening caused by uneven stress is reduced, the support stability of the first support 310 to the high-voltage power distribution element assembly 320 is improved, and the stable operation of the battery device 1000 is ensured.

[0198] In some embodiments of the present application, as shown in Figure 7 and Figure 11 The first support 310 is a plate member, and the first support 310 is formed with a first boss portion 313. The first boss portion 313 is formed by a part of the first support 310 protruding away from the bottom wall of the box body 100 along the second direction Z. The number of the first boss portion 313 is one or multiple.

[0199] For example, the first support 310 can be formed with one, two, three, four, five, six or more first boss portions 313. Among them, the first boss portion 313 is formed by a part of the first support 310 protruding from one side to the other side. In this way, the structural strength of the first support 310 can be improved on the premise of forming the first boss portion 313, without increasing the material usage and cost of the first support 310.

[0200] At the same time, the first boss portion 313 is formed by a part of the first support 310 protruding away from the bottom wall of the box body 100. Not only can the structural strength of the first support 310 be enhanced, but the protruding first boss portion 313 can also change the stress structure of the first support 310. While bearing the weight of the high-voltage power distribution element assembly 320, the stress can be effectively dispersed, the probability of deformation or damage caused by excessive local stress can be reduced, and the support stability of the first support 310 can be improved.

[0201] In addition, the plurality of first boss portions 313 arranged at intervals can also meet the diversified requirements of different components in the high-voltage power distribution element assembly 320 for installation positions and installation heights. Specifically, different first boss portions 313 and non-boss regions on the first support 310 can correspond to the installation of different components, respectively. By adjusting the height and position of the first boss portion 313, precise installation of different components can be achieved, the installation and layout of the high-voltage power distribution element assembly 320 can be optimized, and the overall integration of the battery device 1000 can be improved.

[0202] In the above technical solution, the first boss portion 313 is formed on the first support 310, and the first boss portion 313 is formed by a portion of the first support 310 protruding away from the bottom wall of the box 100. This can improve the structural strength of the first support 310, effectively disperse the stress borne by the first support 310, reduce the probability of deformation or damage caused by excessive local stress, and also allow precise installation of different components by adjusting the height and position of the first boss portion 313, thereby meeting the diversified requirements of different components in the high-voltage power distribution element assembly 320 for installation positions and heights.

[0203] In some embodiments of the present application, as shown in Figure 7 and Figure 11 The first support 310 has an avoidance hole 314 extending through the first support 310 in the second direction Z. The battery device 1000 includes a heat exchange member 400, which includes a heat exchange pipe 410 and a pipe joint 420. The heat exchange pipe 410 is arranged on the side of the first support 310 facing the bottom wall of the box 100. One end of the pipe joint 420 is connected to the heat exchange pipe 410, and the other end extends to the side of the first support 310 away from the bottom wall of the box 100 through the avoidance hole 314.

[0204] In some examples, the number of avoidance holes 314 can be one. The first support 310 can also have a plurality of avoidance holes 314 arranged at intervals. A portion of the heat exchange pipe 410 is arranged on the lower side of the first support 310. The pipe joint 420 connected to the heat exchange pipe 410 is arranged at the position of the avoidance hole 314 and extends out from the position of the avoidance hole 314, so as to facilitate the connection of the heat exchange pipe 410 with external equipment or pipelines and reduce the probability of interference between the heat exchange member 400 and the first support 310.

[0205] In some examples, the avoidance hole 314 can be arranged at intervals with the edge of the first support 310. In some examples, the avoidance hole 314 can extend through one side edge or adjacent two side edges of the first support 310. Further, the avoidance hole 314 can be a circular hole, a polygonal hole, or other special-shaped hole.

[0206] In the embodiment, a part of the heat exchange pipe 410 is located at the lower side of the first support 310, and the heat exchange pipe 410 can exchange heat with the high-voltage power distribution element assembly 320 arranged on the first support 310 through the first support 310, so that each electrical element of the high-voltage power distribution element assembly 320 works in a suitable temperature range, and the operation stability and reliability of the high-voltage power distribution element assembly are improved.

[0207] In the above technical solution, the first support 310 is provided with an avoiding hole 314 for avoiding the pipe joint 420 of the heat exchange element 400. The avoiding hole 314 not only facilitates the assembly of the heat exchange pipe 410 through the pipe joint 420 and the external pipeline, improves the assembly efficiency, but also reduces the mutual interference between the heat exchange pipe 410 and the pipe joint 420 and the first support 310. In addition, the heat exchange pipe 410 can also exchange heat with the high-voltage power distribution element assembly 320 through the first support 310, thereby improving the operation stability of the high-voltage power distribution element assembly 320.

[0208] In some embodiments of the present application, the first direction X is set as the front-rear direction, the second direction Z is set as the up-down direction, and the third direction Y is set as the left-right direction. The battery device 1000 includes a box body 100, a battery monomer assembly 500, and a heat exchange element 400. The box body 100 includes a bottom plate 110 and an upper cover 120. The upper cover 120 is arranged on the upper side of the bottom plate 110 and cooperates with the bottom plate 110 to define a containing cavity. The bottom plate 110 is in the shape of a plate body, and the front end of the bottom plate 110 is provided with a mounting plate extending upward. The upper cover 120 is in the shape of a box body with an open lower side. The front side edge of the upper cover 120 is formed with an avoiding opening which is adapted to the shape of the mounting plate. When the upper cover 120 is arranged on the bottom plate 110, the mounting plate covers the avoiding opening. A sealing element is arranged between the upper cover 120 and the bottom plate 110 to seal the gap between the upper cover 120 and the bottom plate 110.

[0209] The box body 100 further includes mounting beams. The mounting beams are arranged in the containing cavity and fixed to the bottom plate 110. The number of the mounting beams is two. The two mounting beams extend front-rear and are respectively arranged at the positions near the edges on the left and right sides of the bottom plate 110.

[0210] A plurality of ribs are further formed on the bottom plate 110. The plurality of ribs include a plurality of first ribs and second ribs. The plurality of first ribs extend left-right and are arranged in the front-rear direction at intervals. The second ribs extend front-rear and are arranged on one side of the plurality of ribs in the left-right direction. The plurality of ribs, the bottom plate 110, and the mounting beams cooperatively define a containing groove. The heat exchange pipe 410 of the heat exchange element 400 is arranged in the containing groove.

[0211] The battery monomer assembly 500 and the heat exchange piece 400 are arranged in the accommodating cavity, wherein the number of the battery monomer assembly 500 is multiple, the multiple battery monomer assemblies 500 are arranged in sequence along the front-rear direction, each battery monomer assembly 500 includes two rows of battery monomers, the two rows of battery monomers are arranged side by side along the front-rear direction, the multiple battery monomers in each row of battery monomers are arranged in sequence in layers along the left-right direction, and the thickness direction of the battery monomers is along the left-right direction. Wherein, the multiple battery monomer assemblies 500 are arranged between the two mounting beams.

[0212] The heat exchange piece 400 is arranged between the bottom plate 110 and the battery monomer assembly 500, the heat exchange piece 400 includes multiple heat exchange pipes 410, each heat exchange pipe 410 is bent and extends and arranged in the accommodating groove, and the bending position of the heat exchange pipe 410 is circularly bent, the inner side of each heat exchange pipe 410 defines a heat exchange flow channel, at least part of each heat exchange flow channel is formed as a flow channel main body, and the flow channel main bodies of the multiple heat exchange pipes 410 are arranged in sequence along the front-rear direction, and the inlet and outlet of each heat exchange flow channel are arranged on the front side of the battery device 1000.

[0213] Each flow channel main body includes a first heat exchange part and a second heat exchange part, the first heat exchange part includes two horizontal parts and a vertical part, the two horizontal parts extend left and right and are arranged in sequence in the front-rear direction, the vertical part extends in the front-rear direction and is arranged on one side of the two horizontal parts in the left-right direction, and the front and rear ends of the vertical part are connected with the end portions of the two horizontal parts, at this time, the first heat exchange part is in the shape of U opening to one side in the left-right direction.

[0214] The second heat exchange part is arranged between the two horizontal parts of the first heat exchange part, and the second heat exchange part includes multiple horizontal parts extending along the left-right direction and arranged in sequence in the front-rear direction and connected in sequence by bending.

[0215] In one specific example, the number of the heat exchange pipes 410 is two, wherein the inner side of one heat exchange pipe 410 defines a first heat exchange flow channel, and the inner side of the other heat exchange pipe 410 defines a second heat exchange flow channel. The first heat exchange flow channel is entirely formed as a flow channel main body, and is arranged on the front side of the flow channel main body of the second heat exchange flow channel.

[0216] The second heat exchange flow channel includes a first connecting part 131, a flow channel main body and a second connecting part 131 connected in sequence, the first connecting part 131 and the second connecting part 131 extend along the front-rear direction and are arranged in sequence in the left-right direction, and the first connecting part 131 and the second connecting part 131 are arranged on one side of the U-shaped opening of the first heat exchange part of the first heat exchange flow channel.

[0217] The first heat exchange flow channel and the second heat exchange flow channel respectively extend from the corresponding inlets to the outlets, and the ratio of the extension length of the second heat exchange flow channel to the extension length of the first heat exchange flow channel is greater than or equal to 1 and less than or equal to 1.2. The width of the heat exchange flow channel is a first width, and the size of the battery monomer in the front-rear direction is a second width, and the ratio of the first width to the second width is greater than or equal to one-third. The bottom surface of the battery monomer is a first wall surface matched with the heat exchange pipe 410, and the projection area of the heat exchange pipe 410 on the first wall surface is greater than one-third of the area of the first wall surface. In this way, the temperature rise or cooling rate of the battery monomer can be improved.

[0218] The heat exchange member 400 further comprises a first sleeve and a second sleeve, the first sleeve extends along the left-right direction, and the two ends of the first sleeve are respectively connected to the inlet of the first heat exchange flow channel and the inlet of the second heat exchange flow channel; the second sleeve extends along the left-right direction, and the two ends of the second sleeve are respectively connected to the outlet of the first heat exchange flow channel and the outlet of the second heat exchange flow channel.

[0219] The heat exchange member 400 comprises two pipe joints 420, which are respectively liquid inlet joints and liquid outlet joints, the liquid inlet joints are fixedly connected to the first sleeve, and the liquid outlet joints are fixedly connected to the second sleeve. The heat exchange member 400 further comprises a liquid inlet pipe and a liquid outlet pipe, one end of the liquid inlet pipe is connected to the liquid inlet joint and the other end is arranged on the mounting plate fixed to the front end of the bottom plate 110, and one end of the liquid outlet pipe is connected to the liquid outlet joint and the other end is arranged on the mounting plate fixed to the front end of the bottom plate 110.

[0220] In the above technical solution, each column of battery monomers in the battery monomer assembly 500 is arranged in a left-right direction, the thickness direction of the battery monomer is along the left-right direction, and the plurality of heat exchange flow channels of the heat exchange pipe 410 are arranged in a left-right direction from the front end of the battery device 1000 to the rear end of the left and right sides, then bent by 90 degrees to continue to extend in the left-right direction, and gradually return to the front end of the battery device 1000, and the flow channel bodies of the plurality of heat exchange flow channels are arranged in a front-rear direction, thereby realizing heat exchange between the heat exchange flow channel and each battery monomer, and improving the temperature uniformity between the battery monomers.

[0221] In some embodiments of the present application, as shown in Figure 8 , Figures 14-16 As shown in some examples, one side edge of the main plate part 211 is formed with a folded edge 215 bent in the second direction Z.

[0222] In some examples, the first direction X is set as a front-rear direction, and the second direction Z is set as an up-down direction. The front side edge of the main plate part 211 is formed with a folded edge 215 bent downward toward the bottom wall of the box body 100. Further, the folded edge 215 can extend from the left end to the right end of the front side edge of the base 210. In some examples, the front side edge of the main plate part 211 can be provided with a plurality of folded edges 215 arranged at intervals, and the plurality of folded edges 215 are arranged at intervals in the left-right direction.

[0223] In the technical solution, the edge of the main plate part 211 is provided with the turn-up 215. The turn-up 215 can enhance the strength of the base 210, improve the carrying capacity of the base 210, and make the base 210 more reliable and less likely to be deformed due to stress when fixing the related components of the battery management system 200. Meanwhile, the turn-up 215 can be used to realize accurate positioning of the base 210 during installation of the base 210, thereby improving the installation efficiency of the base 210. In addition, the turn-up 215 can also reduce the impact damage of foreign objects to the edge of the base 210, reduce the risk of damage to the base 210 due to accidental impact, and thus ensure long-term stable operation of the battery device 1000.

[0224] In some embodiments of the present application, as shown in Figure 15 and Figure 16 The base 210 is a plate member, and the second boss part 216 is formed on the base 210 by protruding a portion of the base 210 away from the circuit board 220 in the thickness direction of the base 210.

[0225] In some examples, one, two, three, four, five, six or more second boss parts 216 can be formed on the base 210. The second boss part 216 is formed by protruding a portion of the base 210 from one side to the other side, so that the structural strength of the base 210 can be improved without increasing the amount of material and cost of the base 210.

[0226] Meanwhile, the second boss part 216 is formed by protruding a portion of the base 210 towards the bottom wall of the box 100. The second boss part 216 not only enhances the structural strength of the base 210, but also changes the stress structure of the base 210, effectively disperses stress, reduces stress concentration, reduces the probability of deformation of the base 210, and improves the service life of the base 210.

[0227] Since the second boss part 216 is formed by protruding a portion of the base 210 away from the side of the circuit board 220, the gap between the base 210 and the circuit board 220 can be increased, the mutual interference between the base 210 and the circuit board 220 can be reduced, a larger heat dissipation space can be provided for the circuit board 220, the heat dissipation efficiency of the circuit board 220 can be improved, and the risk of failure of the circuit board 220 due to excessive temperature can be reduced.

[0228] In the technical solution, the second boss part 216 is formed on the base 210, and the second boss part 216 is formed by a part of the base 210 protruding away from the circuit board 220. The second boss part 216 can not only improve the structural strength of the base 210 and reduce the probability of deformation of the base 210, but also increase the gap between the circuit board 220 and the base 210, reduce the mutual interference between the base 210 and the circuit board 220, improve the heat dissipation efficiency of the circuit board 220, and prolong the service life of the circuit board 220.

[0229] In some embodiments of the present application, as shown in Figure 16 and Figure 17 The second boss part 216 defines a groove 217 on the side of the base 210 facing the circuit board 220, and the circuit board 220 is opposite to the groove 217 and is fixed to the periphery of the groove 217.

[0230] In some embodiments, the periphery of the groove 217 is formed with a plurality of through holes, and the plurality of through holes are arranged at intervals along the circumferential direction of the groove 217. The periphery of the circuit board 220 is fixedly connected to the base 210 by the fasteners passing through the through holes. Further, the plurality of through holes are arranged on the two opposite side edges of the groove 217 in the first direction X, and the plurality of through holes can be uniformly or non-uniformly arranged on the two side edges of the groove 217.

[0231] In some embodiments, the number of grooves 217 corresponds to the number of second boss parts 216, for example, one, two, three or more grooves 217 can be defined on the base 210. The groove 217 can be rectangular, circular or polygonal in shape.

[0232] In some examples, the number of circuit boards 220 can be one, and the number of circuit boards 220 can also be multiple. When the number of circuit boards 220 is multiple, the plurality of circuit boards 220 are arranged at intervals along the third direction Y. The number of circuit boards 220 can be set according to the specific needs of the battery device 1000.

[0233] In some examples, in order to facilitate the fastening connection of the edge of the circuit board 220 and the edge of the groove 217, and to effectively dissipate heat from the circuit board 220, in the first direction X, the two side edges of the circuit board 220 respectively extend beyond the two side edges of the groove 217 to facilitate the fixation of the circuit board 220. Further, in the third direction Y, the two end edges of the groove 217 respectively extend beyond the two end edges of the circuit board 220, so that external air can enter between the circuit board 220 and the bottom wall of the groove 217 through the two ends of the groove 217, thereby improving the heat dissipation efficiency of the circuit board 220.

[0234] In the technical solution, the circuit board 220 is fixedly connected with the peripheral edge of the groove 217, the peripheral edge of the groove 217 can provide a stable fixing area for the circuit board 220, so that the circuit board 220 can be accurately positioned and firmly installed, reducing displacement deviation in the installation process and improving the structural stability of the battery device 1000. At the same time, since the second boss part 216 defines the groove 217 opposite to the circuit board 220, the groove 217 not only can reduce the risk of direct impact of external objects on the circuit board 220, but also can form an air flow channel on the base 210, which is helpful for heat dissipation of the circuit board 220, ensures efficient work of the circuit board 220 within a normal temperature range, and further improves the overall performance and reliability of the battery device 1000.

[0235] In some embodiments of the present application, as shown in Figure 7 、 Figure 8 and Figure 17 , the base 210 is provided with a first mounting part 218 on one side edge in the first direction X, the first mounting part 218 is formed with a second fixing hole 2111 penetrating through the first mounting part 218 in the second direction Z, and the first mounting part 218 is connected with the side wall of the box body 100 through the third fastener penetrating through the second fixing hole 2111, and the first direction X intersects with the second direction Z.

[0236] In some examples, the base 210 can be provided with one or more first mounting parts 218 on one side edge in the first direction X, and each first mounting part 218 is formed with a second fixing hole 2111. When the number of first mounting parts 218 is multiple, the multiple first mounting parts 218 are arranged at intervals in the third direction Y.

[0237] Further, the front side edge of the base 210 is provided with a plurality of first mounting parts 218 and a plurality of flanges 215, the plurality of first mounting parts 218 are all extended forward and arranged at intervals in the left-right direction, the plurality of flanges 215 are all bent downward and arranged at intervals in the left-right direction, further, one first mounting part 218 is arranged between each adjacent two flanges 215, and each first mounting part 218 is formed with a second fixing hole 2111.

[0238] In the technical solution, the first mounting portion 218 is arranged on the side edge of the base 210 in the first direction X, and the second fixing hole 2111 is arranged through the base 210 in the second direction Z. The third fastener is arranged through the second fixing hole 2111 to connect the base 210 and the side wall of the box body 100. Thus, the fastening connection between the base 210 and the side wall of the box body 100 is achieved, the stability and reliability of the base 210 fixed on the box body 100 are improved, and the probability of displacement or loosening of the base 210 is reduced. In addition, the installation and disassembly of the base 210 are facilitated, and the assembly and maintenance efficiency of the battery device 1000 is improved. In addition, the base 210 is connected between the side wall and the bottom wall of the box body 100, which can improve the structural strength of the box body 100 and enhance the structural strength and stability of the entire battery device 1000.

[0239] In some embodiments of the present application, as shown in Figure 7 The side wall of the box body 100 is provided with a support 130, and the support 130 is provided with a third fixing hole 1321 through the support 130 in the second direction Z. The third fastener is arranged in the third fixing hole 1321, so that the base 210 is fixed on the side wall of the box body 100 through the support 130.

[0240] It should be noted that, since the side wall of the box body 100 extends in the second direction Z, the second fixing hole 2111 on the first mounting portion 218 penetrates the base 210 in the second direction Z. At this time, if the vertical side wall of the box body 100 is directly connected with the base 210 through the fastener, it is not convenient to arrange the third fastener. Therefore, in the present embodiment, the support 130 is arranged on the side wall of the box body 100, and the third fixing hole 1321 is formed on the support 130. The third fixing hole 1321 can be opposite and communicated with the second fixing hole 2111 in the second direction Z, which facilitates the arrangement of the third fastener, simplifies the assembly structure, and improves the assembly efficiency.

[0241] In some examples, the support 130 can be integrally formed with the side wall of the box body 100, or the support 130 can be integrally formed with the box body 20a. In addition, the support 130 can be a separate part from the side wall of the box body 100 or the base 210 of the box body 20a. When the support 130 is a separate part from the side wall of the box body 100, the support 130 can be connected with the side wall of the box body 100 through a fastener or a welding connection.

[0242] In some examples, the base 210 is supported on the upper side of the support 130 through the first mounting portion 218. Thus, the support 130 not only can achieve the fastening connection with the base 210, but also can play a positioning role for the base 210, thereby improving the assembly efficiency.

[0243] In the technical scheme, the support 130 is arranged on the side wall of the box 100, and the third fixing hole 1321 is matched with the third fastener to fix the base 210, the support 130 can share the weight borne by the base 210, avoids single-point stress of the base 210, makes the fixing structure of the whole battery management system 200 more firm, enhances the stability of the battery device 1000 in operation, and reduces the risk of loosening of components caused by vibration, bumping and the like. Meanwhile, the support 130 can also provide a positioning reference for the installation of the base 210, so as to facilitate an installation personnel to quickly and accurately fix the base 210 and the side wall of the box 100, and improve the installation efficiency. In addition, the base 210 is fastened and connected with the side wall of the box 100 through the support 130, which can also reduce the abrasion or damage of the side wall caused by directly fixing the base 210 on the side wall, and prolong the service life of the box 100.

[0244] In some embodiments of the present application, as shown in Figure 7 The support 130 is L-shaped and includes a connecting portion 131 and a support portion 132 connected with each other, the connecting portion 131 is fixed on the side wall of the box 100, and the support portion 132 is a plate-shaped structure arranged perpendicularly to the second direction Z, and the third fixing hole 1321 is formed on the support portion 132.

[0245] In some examples, the connecting portion 131 is a flat plate shape extending along the second direction Z, one side surface of the connecting portion 131 in the thickness direction is attached to the front side wall of the box 100, and further, a through hole penetrating through the connecting portion 131 along the first direction X is formed on the connecting portion 131, and the fastener is fixedly connected with the side wall of the box 100 through the through hole. The number of the through holes is one or a plurality of through holes arranged at intervals in the up-down direction (the second direction Z).

[0246] In some examples, the support portion 132 is connected to the upper end of the connecting portion 131, and the support portion 132 and the connecting portion 131 are integrally formed, wherein the support portion 132 and the connecting portion 131 are connected through a circular arc bending, so as to reduce the stress concentration at the connection position of the support portion 132 and the connecting portion 131.

[0247] Further, a reinforcing structure is formed at the connection position of the support portion 132 and the connecting portion 131, and the reinforcing structure is formed by protruding a part of the support 130 from one side to the other side in the thickness direction of the support 130.

[0248] In some examples, the support 130 is a metal piece. In this way, the structural strength of the support 130 can be improved, and the reliability and stability of the support and fixation of the base 210 can be improved.

[0249] In the technical solution, the support piece 130 comprises a connecting part 131 in L shape and a support part 132. The connecting part 131 can be used to firmly fix the support piece 130 to the side wall of the box body 100. The support part 132 is provided with a third fixing hole 1321 connected to the base 210. The support part 132 can increase the contact area with the base 210, improve the reliability of supporting the base 210, effectively disperse the force borne by the base 210, and reduce the probability of local stress concentration. The support part 132 can also facilitate the installation and positioning of the base 210, and improve the assembly efficiency of the battery management system 200.

[0250] In some embodiments of the present application, as shown in Figure 7 the number of the first mounting parts 218 is multiple, the multiple first mounting parts 218 are arranged at intervals along the third direction Y, the number of the support pieces 130 is multiple, and the multiple support pieces 130 correspond to the multiple first mounting parts 218 one by one. The third direction Y intersects with the second direction Z and the first direction X.

[0251] For example, the number of the support pieces 130 can be two, three, four, five or more. Each support piece 130 is provided with a third fixing hole 1321. The third fixing holes 1321 on the multiple support pieces 130 correspond to the second fixing holes 2111 on the multiple first mounting parts 218 on the base 210 one by one and are vertically opposite to each other.

[0252] In the technical solution, the multiple first mounting parts 218 are arranged at intervals along the third direction Y and correspond to the multiple support pieces 130 one by one. Therefore, the multiple support pieces 130 are distributed at intervals and can jointly bear the weight of the battery management system 200, effectively disperse the force, and improve the stability of supporting the battery management system 200.

[0253] In some embodiments of the present application, as shown in Figure 8 the box cover 230 defines an installation cavity 201 with one side open. The base 210 covers the open side of the installation cavity 201, and the circuit board 220 is located in the installation cavity 201.

[0254] For example, the box cover 230 is arranged on the upper side of the base 210. The box cover 230 defines an installation cavity 201 with the lower side open. The base 210 covers the open side of the installation cavity 201.

[0255] In some examples, in a projection plane perpendicular to the second direction Z, the projection area of the box cover 230 is smaller than the projection area of the base 210, and the projection of the box cover 230 is completely located within the projection of the base 210.

[0256] In the technical solution, the mounting cavity 201 is defined by the cooperation of the box cover 230 and the base 210, and the circuit board 220 is arranged in the mounting cavity 201, so that the circuit board 220 can be effectively protected, the erosion of the circuit board 220 by external pollutants such as dust and water vapor is reduced, and the service life of the circuit board 220 is prolonged. The base 210 is sealed on the open side of the mounting cavity 201 and tightly cooperates with the box cover 230 to form a stable protection structure, thereby ensuring the stability of the circuit board 220 and other electrical elements arranged in the interior.

[0257] In some embodiments of the present application, as shown in Figure 8 The battery management system 200 further comprises a communication module 240 arranged on the box body 20a and located outside the mounting cavity 201. The communication module 240 is electrically connected with the circuit board 220 and is adapted to be communicatively connected with the vehicle controller 2000.

[0258] In some examples, the communication module 240 and the circuit board 220 are arranged on two sides of the base 210 in the thickness direction, for example, the circuit board 220 is arranged on the upper side of the base 210, and the communication module 240 is arranged on the lower side of the base 210. In this way, the base 210 can serve as a barrier between the communication module 240 and the circuit board 220, reducing electromagnetic interference between the communication module 240 and the circuit board 220 and improving the stability of the operation of the circuit board 220 and the communication module 240.

[0259] In the present embodiment, the communication module 240 is electrically connected with the circuit board 220 and is adapted to be communicatively connected with the vehicle controller 2000. In this way, the communication module 240 can quickly and accurately transmit data information inside the battery management system 200 and timely feedback the state of the battery device 1000, such as the power and the temperature, to the vehicle controller 2000. The vehicle controller 2000 can also accurately regulate and control the battery device 1000, thereby ensuring the safe and stable operation of the vehicle.

[0260] In addition, the communication module 240 is arranged outside the mounting cavity 201 defined by the cooperation of the box cover 230 and the base 210, which facilitates flexible replacement and upgrading of the communication module 240 according to the needs of different vehicle models or vehicle controllers 2000, improves the universality and compatibility of the battery management system 200, and reduces development and maintenance costs.

[0261] In the technical solution, the communication module 240 is arranged on the box body 20a and located outside the mounting cavity 201, and the communication module 240 is electrically connected with the circuit board 220 and is adapted to be communicatively connected with the vehicle controller 2000. In this way, not only can the electromagnetic interference between the communication module 240 and the circuit board 220 be reduced, but also the communication between the battery management system 200 and the vehicle controller 2000 can be facilitated, the accurate regulation and control of the battery device 1000 can be realized, and the safe and stable operation of the vehicle can be ensured.

[0262] In a second aspect, the embodiments of the present application also provide a power utilization device 1 comprising the battery device 1000 of any of the above embodiments.

[0263] In the above technical solution, since the power utilization device 1 is provided with the battery device 1000, the circuit board 220 is directly fixed to the inner wall of the box body 100 through the box body 20a, and the BMS support is cancelled, which not only can reduce the material cost and the production and processing investment, but also can simplify the installation process of the battery device 1000, reduce the assembly difficulty, improve the production efficiency. In addition, it can also optimize the space utilization in the box body 100, be beneficial to heat dissipation, improve the energy density of the battery device 1000, and also can reduce the connection points to reduce the failure risk, make the battery management system 200 stable and reliable operation, improve the reliability and stability of the battery device 1000, thereby improving the overall performance of the power utilization device 1.

[0264] The above and other aspects will be more apparent from the following detailed description. Figures 1-3 A vehicle according to one embodiment of the present application is described.

[0265] Referring to Figure 1 , the vehicle comprises a battery device 1000 configured to provide electrical energy for the vehicle.

[0266] Specifically, as shown in Figure 3 and Figure 5 , the battery device 1000 comprises a box body 100, a battery monomer assembly 500, a heat exchange member 400, a battery management system 200 and a high-voltage box 300. The box body 100 comprises a bottom plate 110 and an upper cover 120, the upper cover 120 is arranged on the upper side of the bottom plate 110 and cooperates with the bottom plate 110 to define a receiving cavity, and a sealing member is arranged between the upper cover 120 and the bottom plate 110 to seal the gap between the upper cover 120 and the bottom plate 110.

[0267] The box body 100 further comprises a partition beam arranged in the receiving cavity and separating the receiving cavity into a battery cavity and an electrical cavity. The battery cavity and the electrical cavity are arranged in the length direction of the box body 100, and the electrical cavity is located at the front side of the battery cavity. The battery monomer assembly 500 is arranged in the battery cavity, and the battery management system 200 and the high-voltage box 300 are arranged in the electrical cavity.

[0268] The box body 100 further comprises two mounting beams extending forward and backward and arranged at intervals left and right, the number of the battery cell assemblies 500 is multiple, the multiple battery cell assemblies 500 are arranged in sequence along the front and back direction, each battery cell assembly 500 comprises two rows of battery cells arranged side by side along the front and back direction, and the multiple battery cells in each row of battery cells are arranged in sequence and stacked along the left and right direction, and the thickness direction of the battery cell is along the left and right direction. Wherein, the multiple battery cell assemblies 500 are arranged between the two mounting beams. The heat exchange member 400 is arranged between the battery cell assembly 500 and the bottom plate 110, the heat exchange member 400 comprises multiple heat exchange pipes 410 and two pipe joints 420, and the multiple heat exchange pipes 410 are bent and extended. Part of the heat exchange pipe 410 is located in the battery cavity, another part of the heat exchange pipe 410 is located in the electrical cavity, and the pipe joint 420 is connected with the heat exchange pipe 410 and located in the electrical cavity.

[0269] The high-voltage box 300 comprises a first support 310 and a high-voltage power distribution element assembly 320, the first support 310 is a horizontally arranged plate body, the first support 310 is fastened and connected with the bottom plate 110 and the mounting beam through the second fastener, and the periphery of the first support 310 is formed with a downward bent edge 311, and the spacing between the edge 311 and the side wall and the bottom wall of the box body 100 is less than or equal to 10mm. The high-voltage power distribution element assembly 320 is fixed and supported on the upper side surface of the first support 310, and the high-voltage power distribution element assembly 320 comprises a relay 321, a fuse 322 and an electrical connector 323 connecting each electrical element.

[0270] The battery management system 200 is arranged on the upper side of the high-voltage box 300, and comprises a base 210, a circuit board 220, a box cover 230 and a communication module 240, the base 210 comprises a horizontally arranged main plate part 211 and an extension plate 212 connected to the rear side edge of the main plate part 211 and extending downward, the extension plate 212 is arranged perpendicular to the front and back direction, the lower end of the extension plate 212 is provided with multiple second mounting parts 213 extending downward first and then bending backward, and the multiple second mounting parts 213 are fastened and connected with the first support 310 through the first fastener.

[0271] The front side edge of the base 210 is provided with a downward bent flange 215 and a forward extending first mounting part 218, each first mounting part 218 is provided with a second fixing hole 2111 penetrating along the up and down direction, and the side wall of the box body 100 is further provided with a support 130, the support 130 is L-shaped and comprises a forward and backward extending support part 132, the first mounting part 218 is supported on the support part 132 and fastened and connected with the support part 132 through the third fastener.

[0272] Wherein, the first support 310, the base 210 and the front side wall of the box body 100 jointly enclose an arrangement space, and the high-voltage power distribution element assembly 320 is arranged in the arrangement space.

[0273] The cover 230 is located on the upper side of the main board portion 211 and cooperates with the main board portion 211 to define a mounting cavity 201. Two circuit boards 220 are arranged spaced apart on the left and right sides within the mounting cavity 201. The portion of the base 210 opposite the circuit board 220 is recessed downwards to form a second boss portion 216 and define a groove 217. The communication module 240 is fixed to one end of the main board portion 211 in the left-right direction and located on the lower side of the main board portion 211.

[0274] When installing the battery device 1000 of this embodiment, firstly, the first bracket 310 is installed. For example, the number of second fasteners is ten. The first bracket 310 is fixed to the bottom wall of the housing 100 by the ten second fasteners. At the same time, the distance between the folded edge 311 of the first bracket 310 and the inner wall of the housing 100 is less than 10mm, reducing the risk that the standard parts will fall into the lower part of the first bracket 310 and cannot be removed during installation.

[0275] Next, the high-voltage power distribution component assembly 320 is installed. Specifically, the relay 321, fuse 322, and copper bar (electrical connector 323) are integrated and installed on the first bracket 310. To save installation time, the high-voltage power distribution component assembly 320 can be integrated at the supplier's end or on the assembly line of the battery device 1000, and then installed as a whole inside the enclosure 100.

[0276] Next, the battery management system 200 is assembled, that is, the various parts of the battery management system 200 (base 210, circuit board 220, cover 230 and communication module 240) are integrated and installed together. Specifically, the circuit board 220 is installed on the upper part of the base 210, and the communication module 240 is installed on the lower part of the base 210.

[0277] Finally, the front and rear sides of the base 210 of the battery management system 200 are fastened to the first bracket 310 and the front side wall of the housing 100, respectively.

[0278] In the above technical solution, the base 210 integrates the function of the BMS bracket, and the first bracket 310 integrates the function of the high voltage box 300. The BMS bracket and the high voltage box 300 are eliminated, reducing material costs, simplifying the installation process of the battery device 1000, reducing assembly difficulty, improving production efficiency, increasing the energy density of the battery device 1000, and improving the space utilization rate inside the box 100.

[0279] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, include: A housing (100) having a receiving cavity; A battery management system (200) is disposed within the receiving cavity, and the battery management system (200) includes: The box body (20a) has an installation cavity (201) inside and an installation part fixed to the inner wall of the box body (100). The circuit board (220) is disposed within the mounting cavity (201).

2. The battery device according to claim 1, characterized by The mounting portion includes a first mounting portion (218) and a second mounting portion (213). One side edge of the box body (20a) in the first direction (X) is detachably connected to the side wall of the box body (100) through the first mounting portion (218), and the other side edge of the box body (20a) in the first direction (X) is detachably connected to the bottom wall of the box body (100) through the second mounting portion (213).

3. The battery device of claim 2, wherein, The box body (20a) includes a base (210) and a lid (230), wherein the base (210) and the lid (230) are detachably connected and cooperate to define the mounting cavity (201).

4. The battery device of claim 3, wherein The base (210) includes a main board (211) and an extension plate (212). The main board (211) has a first mounting portion (218) on one side edge in the first direction (X). The extension plate (212) is connected to the other side edge of the main board (211) in the first direction (X) and extends toward the bottom wall of the receiving cavity in the second direction (Z). The extension plate (212) has a second mounting portion (213). The first direction (X) and the second direction (Z) intersect.

5. The battery device of claim 4, wherein, The second mounting portion (213) is provided at one end of the extension plate (212) away from the main board portion (211) in the second direction (Z), and extends away from the main board portion (211) in the first direction (X). A first fixing hole (2131) is formed on the second mounting portion (213) through the second mounting portion (213) in the second direction (Z). The second mounting portion (213) is connected to the bottom wall of the housing (100) by a first fastener passing through the first fixing hole (2131).

6. The battery device of claim 5, wherein, There are multiple second mounting parts (213), and the multiple second mounting parts (213) are arranged at intervals along a third direction (Y). Each second mounting part (213) has the first fixing hole (2131) formed on it. The third direction (Y) intersects with both the second direction (Z) and the first direction (X).

7. The battery device of claim 4, wherein A reinforcing rib (214) is formed at the connection position between the main board (211) and the extension plate (212). There are multiple reinforcing ribs (214), which are arranged at intervals along a third direction (Y). The third direction (Y) intersects both the second direction (Z) and the first direction (X).

8. The battery device of claim 7, wherein, The reinforcing rib (214) is formed by a part of the base (210) protruding from one side to the other side in the thickness direction of the connection position.

9. The battery device of claim 4, wherein, The battery device (1000) further comprises a first support (310) fixed to the bottom wall of the box (100) and a high-voltage power distribution element assembly (320) fixed to the first support (310). The main plate portion (211) is arranged on the side of the high-voltage power distribution element assembly (320) away from the first support (310) in the second direction (Z), and the extension plate (212) is fixedly connected with the first support (310) so that the box body (20a) is connected to the bottom wall of the box (100) through the first support (310).

10. The battery device of claim 9, wherein, The high-voltage power distribution element assembly (320) is arranged on the side of the extension plate (212) facing the main plate portion (211) in the first direction (X), A plurality of wire harness perforations (2121) extending through the extension plate (212) in the first direction (X) are formed on the extension plate (212), and the wire harness perforations (2121) are used for passing through a wire harness.

11. The battery device of claim 9, wherein, The first support (310) is a plate member, and a folded edge (311) is arranged on the periphery of the first support (310) and is folded towards the bottom wall of the box (100) in the second direction (Z).

12. The battery device of claim 11, wherein, The folded edge (311) adjacent to the side wall of the box (100) is a first folded edge (311), and the distance between the first folded edge (311) and the adjacent side wall of the box (100) is less than or equal to 10 mm.

13. The battery device of claim 11, wherein, In the second direction (Z), the distance between the folded edge (311) and the bottom wall of the box (100) is less than or equal to 10 mm.

14. The battery device of claim 9, wherein, A plurality of connection holes are arranged on the first support (310), and the first support (310) is fastened and connected with the bottom wall of the box (100) through a second fastener passing through the connection holes.

15. The battery device of claim 9, wherein, The first support (310) is a plate member, and a first boss portion (313) is formed on the first support (310), the first boss portion (313) is protruded and formed by a part of the first support (310) away from the bottom wall of the box (100) in the second direction (Z), and the number of the first boss portion (313) is one or a plurality of boss portions arranged at intervals.

16. The battery device of claim 9, wherein, An avoidance hole (314) extending through the first support (310) in the second direction (Z) is formed on the first support (310), The battery device (1000) comprises a heat exchange member (400), the heat exchange member (400) comprises a heat exchange pipe (410) and a pipe joint (420), the heat exchange pipe (410) is arranged on the side of the first support (310) facing the bottom wall of the box (100), one end of the pipe joint (420) is connected with the heat exchange pipe (410), and the other end of the pipe joint (420) extends to the side of the first support (310) away from the bottom wall of the box (100) through the avoidance hole (314).

17. The battery device of any one of claims 4-16, wherein, The side edge of the main plate portion (211) is formed with a bent edge (215) bent in a second direction (Z), the first direction (X) intersecting the second direction (Z).

18. The battery device of any one of claims 3-16, wherein, The base (210) is a plate member, and a second boss portion (216) is provided on the base (210), the second boss portion (216) being formed by a portion of the base (210) protruding away from the circuit board (220) in the thickness direction of the base (210).

19. The battery device of claim 18, wherein, The second boss portion (216) defines a groove (217) on the side of the base (210) facing the circuit board (220), the circuit board (220) being opposite the groove (217) and fixed to the periphery of the groove (217).

20. The battery device of any one of claims 3-16, wherein, The side edge of the base (210) in a first direction (X) is provided with the first mounting portion (218), the first mounting portion (218) being formed with a second fixing hole (2111) penetrating the first mounting portion (218) in a second direction (Z), the first mounting portion (218) being connected to the side wall of the cabinet (100) by a third fastener passing through the second fixing hole (2111), the first direction (X) intersecting the second direction (Z).

21. The battery device of claim 20, wherein, The side wall of the cabinet (100) is provided with a support member (130), the support member (130) being provided with a third fixing hole (1321) penetrating the support member (130) in the second direction (Z), the third fastener being arranged in the third fixing hole (1321) to fix the base (210) to the side wall of the cabinet (100) through the support member (130).

22. The battery device of claim 21, wherein, The support member (130) is L-shaped and includes a connecting portion (131) and a support portion (132) connected to each other, the connecting portion (131) being fixed to the side wall of the cabinet (100), the support portion (132) being plate-shaped and arranged perpendicular to the second direction (Z), and the third fixing hole (1321) being formed in the support portion (132).

23. The battery device of claim 21, wherein, The number of the first mounting portions (218) is plural, the plural first mounting portions (218) being arranged at intervals in a third direction (Y), the number of the support members (130) is plural, the plural support members (130) corresponding to the plural first mounting portions (218) one-to-one, and the third direction (Y) intersects the second direction (Z) and the first direction (X).

24. The battery device of any one of claims 3-16, wherein, The box cover (230) defines an installation cavity (201) open on one side, and the base (210) covers the open side of the installation cavity (201).

25. The battery device of any one of claims 1-16, wherein, The battery management system (200) further includes a communication module (240) arranged on the box body (20a) and located outside the installation cavity (201), the communication module (240) being electrically connected to the circuit board (220) and adapted to be communicatively connected to a vehicle controller (2000).

26. An electrical device, comprising: The battery device (1000) of any one of claims 1-25. The battery device (1000) of any one of claims 1-25.

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