Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment. The battery device comprises a box body (110); the expansion beam (2) is arranged in the box body (110) and divides the box body (110) into a first area and a second area which are arranged in the first horizontal direction; a plurality of battery cells (120) disposed within the first region; the electric appliance box (5) is arranged in the second area and is arranged on one side, back to the battery monomers (4), of the expansion beam (2); and the first radiator (3) is plate-shaped and is attached between the expansion beam (2) and the electric appliance box (5), and the first radiator (3) is provided with a flow channel in which a heat exchange medium flows.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery device and electric equipment. BACKGROUND

[0002] In order to increase the space of passenger cabin, reduce the whole vehicle posture, increase the endurance power and improve the front and rear collision safety space, the space of power battery device is continuously compressed. UTILITY MODEL CONTENTS

[0003] The utility model provides a kind of battery device and electric equipment beneficial to reduce the volume of battery device.

[0004] According to one aspect of the present application, a kind of battery device is provided, including: box body;Expansion beam, setting in box body, and box body is divided into first area and second area along the first direction of arrangement;Multiple battery monomers, setting in first area;Electric appliance box, setting in second area, and setting in the side of expansion beam opposite battery monomer;First radiator, it is board-like and attached between expansion beam and electric appliance box, first radiator has the flow channel of flowing heat exchange medium.The board-like first radiator is clamped between expansion beam and electric appliance box, relative to the liquid cooling plate setting in the bottom of electric appliance box, the size of battery device along vertical direction is reduced, beneficial to reduce the space of vertical direction occupied by battery device.

[0005] In some embodiments, the surface of the expansion beam facing the first radiator is provided with a recess, and at least a portion of the first radiator is embedded in the recess.It is beneficial to further reduce the size of the battery device along the horizontal direction, and reduce the space occupied by the battery device along the horizontal direction.

[0006] In some embodiments, the first radiator includes: a sheet portion attached to a surface of the electric appliance box adjacent to the expansion beam;A protruding portion is provided on the side of the sheet portion opposite the electric appliance box and is embedded in the recess.It is beneficial to increase the flow area of the flow channel and the amount of heat exchange medium flowing in the flow channel, thereby increasing the cooling effect of the electric appliance box.Furthermore, the area of the sheet portion of the electric appliance box is larger, so the heat exchange area with the electric appliance box is increased to improve the heat dissipation effect of the electric appliance box.

[0007] In some embodiments, the flow channel of the first radiator flowing heat exchange medium is at least partially disposed in the protruding portion;Or, the flow channel of the first radiator flowing heat exchange medium is at least partially disposed in the combination of the protruding portion and the sheet portion.It is beneficial to increase the flow area of the flow channel and the amount of heat exchange medium flowing in the flow channel, thereby increasing the cooling effect of the electric appliance box.The area of the sheet portion is greater than the area of the cross section of the protruding portion parallel to the surface of the electric appliance box opposite the expansion beam, and the sheet portion abuts against the surface of the electric appliance box facing the expansion beam, which is beneficial to increase the area of the first radiator and the electric appliance box.

[0008] In some embodiments, the bottom of the second area is provided with an access hole, and the battery device further comprises an access cover plate arranged on the access hole. Opening the access cover plate allows the electrical components or circuits in the second area to be repaired or maintained, thereby improving the maintainability of the battery device.

[0009] In some embodiments, the bottom surface of the electrical box abuts or is fixedly connected to the access cover plate. Heat is dissipated to the outside of the battery device through the access cover plate, thereby improving the heat dissipation efficiency of the electrical box and ensuring the normal operation of the electrical components. After the access cover plate is removed, the electrical box can be moved together with the access cover plate to a position away from the box body to facilitate repair.

[0010] In some embodiments, the battery device further comprises a cooling system for cooling the battery cells, and the cooling system comprises a second heat sink arranged in the first area, and the first heat sink is in communication with the cooling system. The communication between the joint of the first heat sink and the cooling system of the battery device simplifies the pipeline and makes the structure of the battery device more compact.

[0011] In some embodiments, the battery device further comprises a third heat sink arranged below the electrical box, and the third heat sink has a flow channel for flowing a heat exchange medium. This helps to improve the heat dissipation efficiency of the electrical box to ensure the normal operation of the electrical components inside it.

[0012] In some embodiments, the battery device further comprises a reinforcing beam arranged in the second area, one end of the reinforcing beam is connected to the expansion beam, and the other end is connected to the side wall opposite to the side wall of the box body. This helps to reduce the deformation of the expansion beam under the cyclic expansion of the battery cells and provides an auxiliary fixing point for the electrical box.

[0013] In some embodiments, the electrical box is connected to the reinforcing beam; or the electrical connector connected to the electrical components or the battery in the electrical box is connected to the reinforcing beam; or the wire harness connected to the electrical components or the battery in the electrical box is connected to the reinforcing beam. The reinforcing beam can provide support for the electrical box or the electrical connector or the wire harness, thereby improving the stability and safety of the above-mentioned components.

[0014] In some embodiments, the battery device further comprises a sampling circuit connected to each of the plurality of battery cells and a sampling circuit board connected to the sampling circuit, and the sampling circuit board is mounted on the electrical box. By arranging the sampling circuit and the electrical box together, the sampling circuit can be cooled by the first heat sink, and maintenance and repair can be facilitated.

[0015] In some embodiments, the sampling circuit is arranged above the plurality of battery cells, and the sampling circuit board is attached to the upper surface of the electrical box, thereby reducing the complexity of the circuit and making the cables inside the battery device compact.

[0016] In some embodiments, the battery device further comprises a control circuit board attached to a side of the electrical appliance box away from the expansion beam or attached to a lower surface of the electrical appliance box. By arranging the control circuit board with the electrical appliance box, the first heat sink can be used for cooling, and maintenance and repair can be facilitated.

[0017] According to another aspect of the present application, a power utilization device is also provided, comprising the above-described battery device.

[0018] In the technical solution of the present application, the battery device comprises a first heat sink for cooling the electrical appliance box. The plate-shaped first heat sink is arranged between the expansion beam and the electrical appliance box, which reduces the size of the battery device in the vertical direction, and is conducive to reducing the space occupied by the battery device in the vertical direction. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required to be used in the embodiments of the present disclosure will be briefly introduced below. Obviously, the drawings described below are only some of the embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings.

[0020] Figure 1 A structural schematic diagram of a vehicle is shown, which illustrates some embodiments of the present application.

[0021] Figure 2 An exploded structural schematic diagram of a battery pack is shown, which illustrates some embodiments of the present application.

[0022] Figure 3 A structural schematic diagram of a battery cell is shown, which illustrates some embodiments of the present application.

[0023] Figure 4 A three-dimensional structural schematic diagram of a battery device is shown, which illustrates some other embodiments of the present application.

[0024] Figure 5 An exploded structural schematic diagram of a battery device is shown, which illustrates some other embodiments of the present application.

[0025] Figure 6 An internal structural schematic diagram of a battery device is shown, which illustrates some other embodiments of the present application.

[0026] Figure 7 An internal structural schematic diagram in a second area of a box of a battery device is shown, which illustrates some other embodiments of the present application.

[0027] Figure 8 A structural schematic diagram of an expansion beam and an electrical appliance box of a battery device is shown, which illustrates some other embodiments of the present application.

[0028] In the figure: 1000, vehicle; 100, battery device; 110, box body; 111, first part; 112, second part; 120, battery monomer; 121, end cover; 121a, electrode terminal; 122, shell; 123, battery cell assembly; 123a, tab; 200, controller; 300, motor; 1, sampling circuit; 2, expansion beam; 21, embedding groove; 3, first heat sink; 31, sheet part; 32, protruding part; 33, joint; 4, reinforcing beam; 5, electrical box; 51, connecting structure; 52, electrical box electrical connector; 6, plug-in part; 7, electrical connector; 8, access hole; 9, access cover plate; 10, sampling circuit board; 11, control circuit board. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The detailed description and the accompanying drawings of the following examples are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described examples.

[0030] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error.

[0031] The orientation words appearing in the following description are the directions shown in the figure, and are not limited to the specific structure of the present application. In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] Further, the ranges disclosed herein are intended to include both endpoints and independent ranges between the endpoints. For example, the ranges of "60-120" and "80- 110" are intended to include "60- 110" and "80-120," just as the endpoints are included. Additionally, it is intended that when numerical lower and upper limits are listed, ranges employing any combination of these limits are also intended to be disclosed. For example, where a range of "1 to 5" is listed as a possible range for a parameter, it is intended that "1 to 5", "3 to 7", and "5 to 10" are also disclosed, as well as the individual ranges of 1-5, 3-7, and 5-10. In this application, the use of "about" or "approximately" in connection with a value means that the value is the indicated value plus or minus 10% of the indicated value.

[0033] All embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions, if not specifically stated otherwise.

[0034] All technical features and optional technical features of the present application can be combined with each other to form new technical solutions, if not specifically stated otherwise.

[0035] All steps of the present application can be performed in sequence or randomly, preferably in sequence, if not specifically stated otherwise. For example, the method comprises steps (a) and (b) means that the method can comprise steps (a) and (b) in sequence, or steps (b) and (a) in sequence. For example, the method can further comprise step (c) means that step (c) can be added to the method in any sequence, for example, the method can comprise steps (a), (b) and (c), or steps (a), (c) and (b), or steps (c), (a) and (b), etc.

[0036] "Include" and "contain" mentioned in the present application means open type, and can also be closed type, if not specifically stated otherwise. For example, "include" and "contain" can mean that other components not listed can also be included or contained, or only the listed components can be included or contained.

[0037] If not specifically stated, the term "or" is inclusive in this application. For example, the phrase "A or B" means "A, B, or both A and B." More specifically, any of the following satisfy the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0038] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system of water power, thermal power, wind power and solar power station, but also widely used in electric bicycle, electric motorcycle, electric vehicle and other electric vehicles, military equipment and aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0039] Figure 1 A structure schematic diagram of a power consumption equipment using a battery as a power source is shown; as Figure 1 shown, the power consumption equipment of the embodiment includes a vehicle 1000, which can be a pure electric vehicle, a hybrid vehicle or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom or head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300, the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation and driving.

[0040] In some embodiments of the application, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0041] Please refer to Figure 2 , Figure 2An exploded view of a battery device 100 is provided for some embodiments of the present application. The battery device 100 includes a box 110 and a battery module disposed in the box 110, the battery module including a plurality of battery cells 120, the battery cells 120 being accommodated in the box 110. The box 110 is configured to provide an accommodation space for the battery cells 120, and the box 110 can have various structures. In some embodiments, the box 110 can include a first part 111 and a second part 112, the first part 111 and the second part 112 being coupled to each other to define an accommodation space for the battery cells 120. The second part 112 can be a hollow structure with one open end, and the first part 111 can be a plate structure, the first part 111 being coupled to the open end of the second part 112 to define the accommodation space together with the second part 112. Alternatively, the first part 111 and the second part 112 can both be hollow structures with one open end, the open end of the first part 111 being coupled to the open end of the second part 112. Of course, the box 110 formed by the first part 111 and the second part 112 can have various shapes, such as a cylinder, a cuboid, etc.

[0042] In the battery device 100, the battery cells 120 can be multiple, and the multiple battery cells 120 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that the multiple battery cells 120 are connected in series and in parallel. The multiple battery cells 120 can be directly connected in series, in parallel, or in a mixed manner, and the whole of the multiple battery cells 120 is accommodated in the box 110. Of course, the battery device 100 can also be that the multiple battery cells 120 are connected in series, in parallel, or in a mixed manner to form a battery module, and the multiple battery modules are connected in series, in parallel, or in a mixed manner to form a whole, which is accommodated in the box 110. The battery device 100 can further include other structures, for example, the battery device 100 can further include a busbar component for electrically connecting the multiple battery cells 120.

[0043] Each of the battery cells 120 can be a secondary battery or a primary battery, and can be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cells 120 can have a cylindrical shape, a flat shape, a cuboid shape, or other shapes.

[0044] Please refer to Figure 3 , Figure 3 An exploded view of a battery cell 120 is provided for some embodiments of the present application. The battery cell 120 is the smallest unit of the battery device 100. As shown in Figure 3 , the battery cell 120 includes an end cover 121, a shell 122, a cell assembly 123, and other functional components.

[0045] The end cover 121 refers to a component that covers the opening of the shell 122 to isolate the internal environment of the battery monomer 120 from the external environment. Without limitation, the shape of the end cover 121 can be adapted to the shape of the shell 122 to fit the shell 122. Optionally, the end cover 121 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 121 is not easily deformed when subjected to extrusion collision, enabling the battery monomer 120 to have higher structural strength and safety performance. The end cover 121 can be provided with functional components such as electrode terminals 121a. The electrode terminals 121a can be used to electrically connect with the cell assembly 123 for outputting or inputting the electrical energy of the battery monomer 120. In some embodiments, the end cover 121 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery monomer 120 when the internal pressure or temperature reaches a threshold value. The material of the end cover 121 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. In some embodiments, an insulating member can also be provided on the inner side of the end cover 121, which can be used to isolate the electrical connection components in the shell 122 from the end cover 121 to reduce the risk of short circuit. For example, the insulating member can be plastic, rubber, etc.

[0046] The shell 122 is a component for fitting the end cover 121 to form the internal environment of the battery monomer 120, wherein the formed internal environment can be used to accommodate the cell assembly 123, electrolyte and other components. The shell 122 and the end cover 121 can be independent components, and an opening can be provided on the shell 122, and the end cover 121 is covered on the opening to form the internal environment of the battery monomer 120. Without limitation, the end cover 121 and the shell 122 can also be integrated, specifically, the end cover 121 and the shell 122 can form a common connecting surface before other components enter the shell, and when it is necessary to encapsulate the internal environment of the shell 122, the end cover 121 is covered on the shell 122. The shell 122 can be various shapes and sizes, such as rectangular, cylindrical, hexagonal, etc. Specifically, the shape of the shell 122 can be determined according to the specific shape and size of the cell assembly 123. The material of the shell 122 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon.

[0047] The cell assembly 123 is a component that undergoes an electrochemical reaction in the battery monomer 120. One or more cell assemblies 123 can be contained in the shell 122. The cell assembly 123 is mainly formed by winding or stacking the electrode sheets, wherein the electrode sheets include positive electrode sheets and negative electrode sheets, and an isolation film is usually provided between the positive electrode sheets and the negative electrode sheets.

[0048] The pole piece mainly includes a thin sheet-shaped current collector and active material coated on the current collector. The positive pole piece (cathode pole piece) and the negative pole piece (anode pole piece) have a part of the active material constituting the main body of the battery assembly, and the parts of the positive pole piece and the negative pole piece without the active material each constitute a pole lug 123a. The positive pole lug and the negative pole lug can be located at one end of the main body or at two ends of the main body respectively. During the charging and discharging process of the battery device 100, the positive active material and the negative active material react with the electrolyte, and the pole lug 123a is connected to the electrode terminal to form a current loop.

[0049] New energy vehicles powered by batteries need to continuously compress the space of the power battery device 100 in order to increase the space of the passenger compartment, reduce the overall attitude, increase the endurance power, and improve the front and rear collision safety space, so the high integration design in the power battery device 100 is becoming more and more important. Among them, increasing the space of the passenger compartment, reducing the overall attitude, and increasing the endurance power require compressing the Z-direction (height direction) space of the power battery device; and increasing the endurance power and improving the front and rear collision safety space require compressing the X-direction (length direction of the vehicle) space of the power battery device 100.

[0050] In order to compress the space occupied by the battery device 100 and reduce the volume of the battery device 100, refer to the drawings Figures 4 to 7 In some embodiments of the present application, the battery device includes a box body 110, an expansion beam 2, a plurality of battery monomers 120, an electrical box 5, and a first heat sink 3.

[0051] The expansion beam 2 is transversely arranged in the box body 110 and divides the box body 110 into a first area and a second area. The plurality of battery monomers 120 are arranged in the first area. The electrical box 5 is arranged in the second area and on the side of the expansion beam 2 opposite to the battery monomers 120. The first heat sink 3 is plate-shaped and attached between the expansion beam 2 and the electrical box 5, and the first heat sink 3 has a flow channel for flowing a heat exchange medium.

[0052] The box body 110 of the battery device 100 is divided into a first area and a second area by the expansion beam. The plurality of battery monomers 120 are arranged in the first area in a row-column arrangement. The electrical box 5 is arranged in the second area. The electrical box 5 includes a box body and electrical elements (such as relays) arranged in the box body. The positive and negative poles of the plurality of battery monomers 120 in the first area are respectively electrically connected to the electrical elements in the electrical box 5, and the electrical elements in the electrical box 5 can generate a large amount of heat during operation.

[0053] In order to ensure the normal operation of the electric appliance box 5, avoid overheating and improve the safety performance of the battery device, the battery device 100 in the embodiment includes a first radiator 3 for cooling the electric appliance box 5. The plate-shaped first radiator 3 is clamped between the expansion beam 2 and the electric appliance box 5, and a liquid cooling plate is arranged at the bottom of the electric appliance box 5, which reduces the size of the battery device 100 in the vertical direction and is beneficial to reducing the space occupied by the battery device 100 in the vertical direction.

[0054] Further, the box wall of the electric appliance box 5 adjacent to the expansion beam 2 is parallel to the surface of the expansion beam 2 adjacent to the electric appliance box 5, and the plate-shaped first radiator 3 is clamped between the expansion beam 2 and the electric appliance box 5. On the basis of reducing the space occupied by the battery device 100 in the vertical direction, the space in the horizontal direction (for example, the length direction of the vehicle) is also limited.

[0055] In some embodiments, the electric appliance box 5 is a high-voltage electric appliance box. The electric appliance elements in the electric appliance box 5 are connected with the electrodes of the battery monomers. The electric appliance box 5 includes an electric appliance box body, a connecting structure 51 arranged at one end of the electric appliance box, and an electric appliance box electric connector 52 connected with the electric appliance elements in the electric appliance box body.

[0056] In some embodiments, the surface of the expansion beam 2 facing the first radiator 3 is provided with an embedding groove 21, and at least a part of the first radiator 3 is embedded in the embedding groove 21. This is beneficial to further reducing the size of the battery device 100 in the horizontal direction and reducing the space occupied by the battery device 100 in the horizontal direction.

[0057] Referring to Figure 8 , the first radiator 3 includes a sheet-shaped part 31 and a protruding part 32. The sheet-shaped part 31 is attached to the surface of the electric appliance box 5 adjacent to the expansion beam 2; the protruding part 32 is arranged on the side of the sheet-shaped part 31 away from the electric appliance box 5 and is embedded in the embedding groove 21, and the flow channel of the heat exchange medium of the first radiator 3 is at least partially arranged in the protruding part 32.

[0058] The thickness of the position of the first radiator 3 provided with the protruding part 32 is larger, and the flow channel of the heat exchange medium is arranged at the position of the protruding part 32, which is beneficial to increasing the flow area of the flow channel and the amount of heat exchange medium flowing in the flow channel, thereby increasing the cooling effect of the electric appliance box. Further, the area of the sheet-shaped part 31 of the electric appliance box 5 is larger, so the heat exchange area with the electric appliance box 5 is increased to improve the heat dissipation effect of the electric appliance box 5.

[0059] In some embodiments, the flow channel of the flow-through heat exchange medium of the first heat sink 3 is at least partially arranged in the combination of the protruding portion 32 and the sheet-shaped portion 31, which is advantageous for increasing the flow area of the flow channel and the amount of the flow-through heat exchange medium in the flow channel, thereby increasing the cooling effect on the electrical appliance box.

[0060] The battery device further comprises a reinforcing beam 4 arranged in the second region, one end of the reinforcing beam 4 is connected with the expansion beam 2, and the other end is connected with the side wall of the box body 110 opposite to the box body 110. This is advantageous for reducing the deformation of the expansion beam under the cyclic expansion of the battery monomer and providing an auxiliary fixing point for the electrical appliance box.

[0061] The electrical appliance box 5 is connected with the reinforcing beam 4; the electrical connector 7 connected with the electrical elements or the battery in the electrical appliance box 5 is connected with the reinforcing beam 4; and the wire harness connected with the electrical elements or the battery in the electrical appliance box 5 is connected with the reinforcing beam 4. The reinforcing beam 4 can provide support for the electrical appliance box 5 or the electrical connector 7 or the wire harness, thereby improving the stability and safety of the above-mentioned components.

[0062] In some embodiments, the bottom of the second region is provided with an access hole 8, and the battery device further comprises an access cover plate 9 arranged on the access hole 8. Opening the access cover plate 9 can facilitate the maintenance or repair of the electrical elements or the circuit in the second region, thereby improving the maintainability of the battery device.

[0063] The battery device further comprises a cooling system for cooling the battery monomer 120, and the cooling system comprises a second heat sink arranged in the first region, and the first heat sink 3 is in communication with the cooling system. The communication between the joint 33 of the first heat sink 3 and the cooling system of the battery device is advantageous for simplifying the pipeline and making the structure of the battery device more compact.

[0064] In some embodiments, the battery device further comprises a third heat sink arranged below the electrical appliance box 5, and the third heat sink has a flow channel for the flow of the heat exchange medium. This is advantageous for improving the heat dissipation efficiency of the electrical appliance box to ensure the normal operation of the electrical elements therein.

[0065] In some embodiments, the bottom surface of the electrical appliance box 5 abuts against the access cover plate 9, so that heat is dissipated to the outside of the battery device through the access cover plate 9, which is advantageous for improving the heat dissipation efficiency of the electrical appliance box 5 to ensure the normal operation of the electrical elements.

[0066] In some embodiments, the electrical appliance box 5 is fixedly connected with the access cover plate 9, and after the access cover plate 9 is disassembled, the electrical appliance box 5 can be moved together with the access cover plate 9 to a position away from the box body for maintenance.

[0067] In some embodiments, the sampling circuit 1 is further connected with the plurality of battery monomers 120 respectively, and the sampling circuit board 10 is connected with the sampling circuit 1 in signal connection, and the sampling circuit board 10 is installed on the electric appliance box 5. The sampling circuit 1 is arranged together with the electric appliance box 5, which not only can utilize the first heat sink 3 for cooling, but also can facilitate maintenance and maintenance.

[0068] In some embodiments, the sampling circuit 1 is arranged above the plurality of battery monomers 120, and the sampling circuit board 10 is attached to the upper surface of the electric appliance box 5, which is beneficial to reduce the complexity of the line, so as to make the cable inside the battery device compact and improve the regularity of the cable.

[0069] In some embodiments, the control circuit board 11 is further attached to the side of the electric appliance box 5 away from the expansion beam 2 or attached to the lower surface of the electric appliance box 5. The control circuit board 11 is arranged together with the electric appliance box 5, which not only can utilize the first heat sink 3 for cooling, but also can facilitate maintenance and maintenance.

[0070] Specifically, in the technical solution of the present application, the electric appliance box 5 water cooling plate is integrated in the box beam, which reduces the Z direction (height direction of the vehicle) and X direction (width direction of the vehicle) space of the second area, meets the scene demand of front assembly & bottom maintenance, and improves the thermal performance of the end cell. At the same time, direct connection with the battery water cooling system can be considered, which reduces the number of adapter water pipes.

[0071] The electric appliance box 5 side lock is locked on the expansion beam 2 (box beam), which reduces the X direction space of the second area, and cooperates with the first heat sink 3 (water cooling plate) integrated in the expansion beam 2 for heat dissipation, and can also be compatible with the arrangement requirements of different connector panels.

[0072] The water cooling and other heat sinks can be added to the back (close to the water cooling plate side) and / or bottom surface of the electric appliance box 5, the high and low voltage connector devices are arranged on the front (away from the water cooling plate side) and upper surface of the electric appliance box 5, and the electric appliance box 5 locking points are arranged on the side surface of the electric appliance box 5 for connecting the expansion beam.

[0073] At the same time, the support structure is added to the expansion beam 2, which reduces the deformation of the expansion beam 2 under the cycle expansion of the electric cell, and provides an auxiliary fixing point for the electric appliance box 5.

[0074] As Figure 5, the battery device internally contains a first area and a second area containing battery monomers, the two areas are separated by the box expansion beam. Each column of the first area has a sampling circuit that needs to be connected to the sampling circuit board 10 of the second area, and the total positive and negative of the first area needs to be connected to the electrical box 5 of the second area. In order to improve the high-voltage overcurrent capacity of the electrical box 5, the second area is usually arranged with a water cooling plate; the second area is arranged with an electrical connector connected to the connector on the box; the second area is arranged with a reinforcing beam 4 to improve the strength of the expansion beam 2; The bottom of the box is arranged with a bottom access hole 8 and a bottom access cover plate 9.

[0075] As Figure 6 And 7 The water cooling plate is arranged on the expansion beam 2, which can simultaneously water-cool and water-heat the battery monomers and the electrical box 5, thereby improving the thermal management performance. The water cooling plate can be fixed on the expansion beam by bolts, adhesion, etc.; the flow channel of the water cooling plate can be embedded in the embedding groove 21 (flow channel avoidance feature) of the expansion beam 2, thereby improving the design integration. The water cooling connector 33 of the water cooling plate is connected with the water inlet and outlet pipeline of the battery device. In some embodiments, the pipeline of the cooling system of the battery device extends from the first area to the second area, and a through hole is formed on the expansion beam 2 for pipeline avoidance. The electrical box 5 is locked on the expansion beam 2 and in contact with the water cooling plate to ensure heat dissipation of the electrical box 5 and the electrical connector. In some embodiments, the electrical box 5 is in contact with the bottom access cover plate 9 to enhance heat dissipation.

[0076] The electrical box 5 is a scheme integrating the sampling circuit board 10 and the control circuit board 11. In the bottom maintenance design, not only the disassembly of the electrical connector needs to be considered, but also the disassembly of the connectors of the sampling circuit board 10 and the control circuit board 11. The sampling circuit board 10 and the control circuit board 11 are arranged on the upper part and the front part of the electrical box 5, and the connectors of the sampling circuit board 10 and the control circuit board 11 are arranged at the edge of the electrical box 5 to facilitate bottom maintenance operation. High-voltage electrical connection locks are arranged below and on the left and right sides of the front part of the electrical box 5, and a vertical locking mode is recommended, which can be compatible with top assembly and bottom maintenance scene requirements. The electrical box 5 mounting feet fix the electrical box 5 on the expansion beam, and can also be fixed on the reinforcing beam and the bottom access hole 8. The rear part and the bottom part of the electrical box 5 are heat dissipation surfaces.

[0077] The box reinforcing beam 4 is fixed on the box expansion beam and the box frame, and the main function is to reduce the deformation of the box expansion beam 2 under the cyclic expansion of the battery monomers, and also provides auxiliary fixing points for the electrical box 5, the electrical connector, and the wire harness.

[0078] Although the present application has been described with reference to preferred embodiments, various modifications can be made to the application without departing from the scope of the application. In particular, the technical features mentioned in the various embodiments can be combined in any way, provided that 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, The battery device comprises: a box body (110); an expansion beam (2) arranged in the box body (110) and dividing the box body (110) into a first region and a second region arranged along a horizontal first direction; a plurality of battery cells (120) arranged in the first region; an electrical box (5) arranged in the second region and arranged on a side of the expansion beam (2) opposite to the battery cells (120); a first heat sink (3) in a plate shape and attached between the expansion beam (2) and the electrical box (5), the first heat sink (3) having a flow channel for flowing a heat exchange medium.

2. The battery device according to claim 1, characterized by A surface of the expansion beam (2) facing the first heat sink (3) is provided with a recess (21), and at least a part of the first heat sink (3) is embedded in the recess (21).

3. The battery device of claim 2, wherein The first heat sink (3) comprises: a sheet-shaped portion (31) attached to a surface of the electrical box (5) adjacent to the expansion beam (2); a protruding portion (32) arranged on a side of the sheet-shaped portion (31) opposite to the electrical box (5) and embedded in the recess (21).

4. The battery device according to claim 3, wherein the flow channel of the first heat sink (3) for flowing the heat exchange medium is at least partially arranged in the protruding portion (32); or the flow channel of the first heat sink (3) for flowing the heat exchange medium is at least partially arranged in a combination of the protruding portion (32) and the sheet-shaped portion (31).

5. The battery device of claim 1, wherein A bottom of the second region is provided with an access hole (8), and the battery device further comprises an access cover plate (9) arranged on the access hole (8).

6. The battery device of claim 5, wherein A bottom surface of the electrical box (5) abuts against or is fixedly connected to the access cover plate (9).

7. The battery device of claim 1, wherein The battery device further comprises a cooling system for cooling the battery cells (120), the cooling system comprising a second heat sink arranged in the first region, and the first heat sink (3) is in communication with the cooling system.

8. The battery device of claim 1, wherein The battery device further comprises a third heat sink arranged below the electrical box (5), and the first heat sink (3) has a flow channel for flowing a heat exchange medium.

9. The battery device of claim 1, wherein, The battery device further comprises a reinforcing beam (4) arranged in the second region, one end of the reinforcing beam (4) is connected to the expansion beam (2), and the other end is connected to a side wall of the box body (110) opposite to the box body (110).

10. The battery device according to claim 9, wherein the electrical box (5) is connected to the reinforcing beam (4); or an electrical connector (7) connected to an electrical element or a battery in the electrical box (5) is connected to the reinforcing beam (4); or a wire harness connected to an electrical element or a battery in the electrical box (5) is connected to the reinforcing beam (4).

11. The battery device of claim 1, wherein, The battery device further comprises a sampling circuit (1) connected to each of the plurality of battery cells (120) and a sampling circuit board (10) in signal connection with the sampling circuit (1), and the sampling circuit board (10) is mounted on the electrical box (5).

12. The battery device of claim 11, wherein, The sampling circuit (1) is arranged above a plurality of battery monomers (120), and the sampling circuit board (10) is attached to the upper surface of the electric appliance box (5).

13. The battery device of claim 1, wherein, The battery device further comprises a control circuit board (11) attached to the side of the electric appliance box (5) away from the expansion beam (2) or attached to the lower surface of the electric appliance box (5).

14. An electrical device, characterized by The battery device according to any one of claims 1 to 13.

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