Battery device, vehicle and energy storage device

Abstract

The embodiment of the utility model provides a battery device, a vehicle and an energy storage device, and belongs to the technical field of batteries. The battery device comprises a box body, an expansion beam, a first cover, a second cover and an electric connecting piece, the expansion beam is installed in the box body, the expansion beam and the box body form a first cavity used for accommodating a battery monomer and a second cavity used for accommodating a distribution box, and the expansion beam is provided with an assembly hole communicated with the first cavity and the second cavity; the first cover and the second cover are provided with a through hole communicated with the first cavity and the second cavity, the first cover is installed in the assembling hole and connected with the expansion beam in a sealed mode, and the second cover is arranged on the rear side of the expansion beam and connected with the expansion beam in a sealed mode; the electric connecting piece is arranged in the through hole in a penetrating mode and connected with the through hole in a sealed mode. The sealing performance of the first cavity and the second cavity of the battery device can be improved, the leakage risk of a liquid cooling working medium is reduced, and the reliability and stability of a product in the using process are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and more particularly, to a battery device, a vehicle and an energy storage device. BACKGROUND

[0002] In the related art, the distribution box and the battery monomer are arranged on both sides of the expansion beam of the battery box body, and one end of the copper bar connecting structure and other electrical connecting members needs to pass through the expansion beam to realize the electrical connection of the distribution box and the battery monomer. However, for the battery device using immersion liquid cooling, the cavity accommodating the battery monomer contains liquid cooling medium, and the penetration of the electrical connecting member through the expansion beam will cause poor sealing of the cavity accommodating the battery monomer, which is prone to cause leakage of the liquid cooling medium, and needs to be improved. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a battery device, a vehicle and an energy storage device to improve the sealing between the electrical connecting member and the expansion beam, reduce the risk of leakage of the liquid cooling medium, and improve the reliability and stability during use of the product.

[0004] In a first aspect, the embodiments of the present application provide a battery device, comprising: a box body, an expansion beam, a first cover, a second cover and an electrical connecting member; the expansion beam is installed in the box body and forms a first cavity for accommodating a battery monomer and a second cavity for accommodating a distribution box with the box body, and is provided with an assembly hole communicating the first cavity and the second cavity; the first cover and the second cover are formed with a through hole communicating the first cavity and the second cavity, the first cover is installed in the assembly hole and is in sealed connection with the expansion beam, and the second cover is arranged at the rear side of the expansion beam and is in sealed connection with the expansion beam; the electrical connecting member is arranged in the through hole and is in sealed connection with the through hole.

[0005] In the above technical solution, by providing the first cover and the second cover, the first cover and the second cover are provided with the through hole, the first cover and the second cover are in sealed connection with the expansion beam to form a plurality of bent sealing surfaces, the electrical connecting member is arranged in the through hole and is in sealed connection with the through hole to prolong the axial length of the sealed connection between the through hole and the electrical connecting member, thereby improving the sealing of the first cavity and the second cavity of the battery device, reducing the risk of leakage of the liquid cooling medium from the expansion beam assembly hole, and improving the reliability and stability during use of the product.

[0006] In some embodiments, the first cover comprises a first blocking portion and a first connecting portion, the first connecting portion is arranged in the assembly hole, and the first blocking portion is arranged at the front side of the expansion beam.

[0007] Along the axial direction of the assembly hole, the projection of the assembly hole falls within the projections of the first blocking portion and the second cover.

[0008] In some embodiments, at least one second seal is arranged between the first stop and the front side of the expansion beam; and / or,

[0009] At least one third seal is arranged between the first connecting portion and the assembly hole; and / or,

[0010] At least one fourth seal is arranged between the second cover and the rear side of the expansion beam.

[0011] In some embodiments, a second sealing groove is arranged on the side of the expansion beam facing the first stop, the second sealing groove being used for placing the second seal; and / or,

[0012] A third sealing groove is arranged on the side of the expansion beam facing the first connecting portion, the third sealing groove being used for placing the third seal; and / or,

[0013] A fourth sealing groove is arranged on the side of the expansion beam facing the second cover, the fourth sealing groove being used for placing the fourth seal.

[0014] In some embodiments, the second cover comprises a second stop and a second connecting portion, the second stop being sealingly connected with the rear side of the expansion beam, and the second connecting portion being arranged on the side of the second stop away from the expansion beam, the projection of the assembly hole along the axial direction falling within the projection of the second stop.

[0015] In some embodiments, the first cover is provided with a first hole portion, the second cover is provided with a second hole portion, the first hole portion and the second hole portion are arranged in alignment to form the through hole, and the electric connecting member is arranged to pass through the first hole portion and the second hole portion;

[0016] At least one of the first hole portion and the second hole portion is sealingly connected with the electric connecting member.

[0017] In some embodiments, at least one first seal is arranged between the first hole portion and the electric connecting member.

[0018] In some embodiments, the first hole portion is provided with at least one first sealing groove, the first sealing groove being used for placing the first seal.

[0019] In a second aspect, the embodiments of the present application provide a vehicle comprising the battery device according to any one of the embodiments described above.

[0020] In a third aspect, the embodiments of the present application provide an energy storage device comprising the battery device according to any one of the embodiments described above. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0022] Figure 1 One of the structural schematic diagrams of the battery device provided by some embodiments of the present application;

[0023] Figure 2 The second structural schematic diagram of the battery device provided by some embodiments of the present application;

[0024] Figure 3 The third structural schematic diagram of the battery device provided by some embodiments of the present application;

[0025] Figure 4 The fourth structural schematic diagram of the battery device provided by some embodiments of the present application.

[0026] Reference signs:

[0027] Battery device 1, box 11, expansion beam 111, assembly hole 1111, first cavity 112, second cavity 113;

[0028] First cover 12, first blocking part 121, first connecting part 122, second cover 13, second blocking part 131, second connecting part 132, through hole 14, first hole part 141, second hole part 142, electrical connection 15;

[0029] Fastener 16, distribution box 17;

[0030] First sealing member 181, second sealing member 182, third sealing member 183, fourth sealing member 184. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] 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 in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the use herein of terms such as "comprise", "comprises" or "comprising" is to be construed as specifying the presence of the stated features or components but does not preclude the presence or addition of one or more other features, components or steps; the use herein of terms such as "first", "second" and "third" are used to identify different objects, and are not to be construed as a description of a particular order or sequence unless otherwise explicitly stated.

[0033] 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 appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another.

[0034] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection", "attaching" should be understood in a broad sense, for example, can be fixedly connected, or detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0035] The term "and / or" in the application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the application generally represents that the front and rear associated objects have an "or" relationship.

[0036] "Multiple" appearing in the application refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0037] The battery cell includes a housing, an electrode assembly, and an electrolyte, the housing being configured to accommodate the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator.

[0038] In some embodiments, the battery device can be a battery pack, which includes a box body and one or more battery cell assemblies accommodated in the box body.

[0039] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the case by fixing the battery module in the case.

[0040] As an example, the battery cell assembly can also be housed in the case by fixing a plurality of battery cells directly to the case.

[0041] As an example, the case can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that an enclosed space is formed inside the case to accommodate the battery cell assembly.

[0042] In some embodiments, the case can be part of a chassis structure of a vehicle. For example, part of the case can be at least part of a floor of the vehicle, or part of the case can be at least part of a cross beam and a longitudinal beam of the vehicle.

[0043] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery devices, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spacecraft. The battery device is used to store or provide electric energy.

[0044] The embodiments of the present application provide a power storage device including one or more battery clusters to improve the voltage and capacity of the power storage device. The battery cluster can include a plurality of battery devices, and the plurality of battery devices are connected in series through a busbar component to improve the voltage of the power storage device. When the power storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the power storage device.

[0045] The power storage device can be used in a power storage power station, a wind power generation system, a solar power generation system, a mobile power system, or a temporary power supply system, etc. The power storage device can store electric energy as needed and output electric energy at an appropriate time. For example, the power storage device can store electric energy during a low electricity consumption period, and provide electric energy to related users or electric devices during a high electricity consumption period. The power storage system provided by the embodiments of the present application can be any power system that needs to use a power storage device.

[0046] In some embodiments, the power storage device is a power storage container or a power storage cabinet.

[0047] The embodiments of the present application provide a power consumption device using a battery monomer or a battery device or an energy storage device or an energy storage system as a power supply. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship and a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy and an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0048] The vehicle can be a fuel car, a gas car or a new energy car. The new energy car can be a pure electric car, a hybrid car or a range extended car, etc. The vehicle is internally provided with a battery device, which can be arranged at the bottom, the head or the tail of the vehicle. The battery device can be used for power supply of the vehicle, for example, the battery device can be used as an operating power supply of the vehicle.

[0049] In some embodiments of the present application, the battery device can not only be used as an operating power supply of the vehicle, but also be used as a driving power supply of the vehicle, to replace or partially replace fuel or natural gas to provide driving power for the vehicle.

[0050] In the related art, the distribution box and the battery monomer are arranged on both sides of the expansion beam of the battery box body, and one end of the copper bar connecting structure and other electrical connecting members needs to pass through the expansion beam to realize the electrical connection between the distribution box and the battery monomer. However, for the battery device using immersion liquid cooling, the cavity containing the battery monomer contains liquid cooling medium, and the penetration of the electrical connecting member through the expansion beam will cause poor sealing of the cavity containing the battery monomer, which is easy to cause leakage of the liquid cooling medium.

[0051] To solve the above problems, as shown in Figures 1-4 , the present application provides a battery device, a vehicle and an energy storage device to improve the sealing between the electrical connecting member 15 and the expansion beam 111 and reduce the leakage of the liquid cooling medium.

[0052] As shown in Figure 1 and Figure 2 , the battery device 1 provided by the present application comprises a box body 11, an expansion beam 111, a first cover 12, a second cover 13 and an electrical connecting member 15.

[0053] The expansion beam 111 is installed in the box body 11 and forms a first cavity 112 for containing the battery monomer and a second cavity 113 for containing the distribution box 17 with the box body 11. The two ends of the expansion beam 111 are connected with the two side frames of the box body 11 respectively, and the expansion beam 111 is an integral beam structure.

[0054] For example, the material of the expansion beam 111 can be aluminum alloy, steel or composite material, etc.

[0055] The first cavity 112 is filled with a liquid cooling medium to liquid cool the battery cells.

[0056] The expansion beam 111 is provided with an assembly hole 1111 communicating the first cavity 112 and the second cavity 113, the assembly hole 1111 is used for passing an electrical connection assembly between the distribution box 17 and the battery cells, the electrical connection assembly is sealingly connected with the expansion beam 111 to reduce the leakage of the liquid cooling medium from the connection between the expansion beam 111 and the electrical connection assembly.

[0057] The electrical connection assembly includes a first cover 12, a second cover 13 and an electrical connection piece 15, the electrical connection piece 15 is arranged in the first cover 12, and two ends of the electrical connection piece 15 are respectively used for electrical connection with the battery cells and the distribution box 17, and the electrical connection piece 15 can be a copper bar connection piece.

[0058] The first cover 12 and the second cover 13 are formed with a through hole 14 communicating the first cavity 112 and the second cavity 113, the through hole 14 is used for mounting the electrical connection piece 15, and the hole shape and the hole diameter of the through hole 14 are adapted to the electrical connection piece 15.

[0059] The electrical connection piece 15 is arranged in the through hole 14 and sealingly connected with the through hole 14, and a sealing piece or a labyrinth seal or the like can be used to form a sealing connection between the electrical connection piece 15 and the through hole 14, so as to reduce the risk of leakage of the liquid cooling medium in the first cavity 112 from the connection between the electrical connection piece 15 and the through hole 14.

[0060] The first cover 12 is mounted in the assembly hole 1111 and sealingly connected with the expansion beam 111, a part of the first cover 12 can be arranged in the assembly hole 1111, a part of the first cover 12 is arranged outside the assembly hole 1111, or the first cover 12 is entirely arranged in the assembly hole 1111.

[0061] In some embodiments, as shown in Figs. 1 and 2, the first cover 12 can include a first blocking portion 121 and a first connecting portion 122, the first connecting portion 122 is arranged in the assembly hole 1111, and the first blocking portion 121 is arranged on one side of the expansion beam 111, i.e., the first blocking portion 121 and the second cover 13 are arranged on two sides of the expansion beam 111. Figure 3 Figure 4 In some embodiments, as shown in Figs. 1 and 2, the first cover 12 can include a first blocking portion 121 and a first connecting portion 122, the first connecting portion 122 is arranged in the assembly hole 1111, and the first blocking portion 121 is arranged on one side of the expansion beam 111, i.e., the first blocking portion 121 and the second cover 13 are arranged on two sides of the expansion beam 111.

[0062] In the present embodiment, the first cover 12 forms a sealing section with the front side of the expansion beam 111, the first connecting portion 122 forms a sealing section with the assembly hole 1111, the second cover 13 forms a sealing section with the rear side of the expansion beam 111, and the first cover 12 and the second cover 13 form a plurality of bent sealing sections with the expansion beam 111, i.e., a labyrinth seal is formed, so that the first cover 12, the second cover 13 and the expansion beam 111 can improve the sealing performance of the connection through the labyrinth seal.

[0063] ​In the embodiment, along the axial direction of the assembly hole 1111, the projection of the assembly hole 1111 falls within the projections of the first cover 12 and the second cover 13, so that the first cover 12 and the front side of the expansion beam 111 have coinciding surfaces to form a sealing section, and the second cover 13 and the rear side of the expansion beam 111 have coinciding surfaces to form a sealing section, so that the first cover 12, the second cover 13 and the expansion beam 111 can improve the sealing performance of the connection through the labyrinth seal.

[0064] In some embodiments, as shown in Figure 3 and Figure 4 The first stop 121 and the front side of the expansion beam 111 can be provided with at least one second sealing member 182, and the second sealing member 182 can be one or more, and the second sealing member 182 is clamped between the first stop 121 and the front side of the expansion beam 111.

[0065] The second sealing member 182 can be a sealing ring concentrically arranged with the assembly hole 1111, and in the case that multiple second sealing members 182 are provided, the multiple second sealing members 182 can be sealing rings with different diameters, and the multiple second sealing members 182 are arranged at intervals along the radial direction of the assembly hole 1111 to achieve multiple sealing of the coinciding area of the first stop 121 and the front side of the expansion beam 111 and enhance the sealing effect.

[0066] The number of second sealing members 182 can be determined according to the area of the coinciding area of the first stop 121 and the front side of the expansion beam 111.

[0067] The second sealing member 182 can be a rubber ring or a silicone ring.

[0068] In some embodiments, the side of the expansion beam 111 facing the first stop 121 is provided with a second sealing groove for placing the second sealing member 182, and the second sealing groove is used for limiting and fixing the second sealing ring to reduce the displacement of the second sealing member 182.

[0069] The second sealing groove is an annular groove extending circumferentially along the assembly hole 1111, and the number and diameter of the second sealing groove are matched with the second sealing member 182 to increase the sealing effect of the first stop 121 and the front side of the expansion beam 111.

[0070] In the case that multiple second sealing grooves are provided, the multiple second sealing grooves are arranged at intervals along the radial direction of the assembly hole 1111 to fix the multiple second sealing members 182.

[0071] In some embodiments, at least one third sealing member 183 is provided between the first connecting portion 122 and the assembly hole 1111.

[0072] The third seal 183 can be one or more, and the third seal 183 is clamped between the first connecting portion 122 and the assembly hole 1111.

[0073] When the third seal 183 is provided with multiple third seals 183, the multiple third seals 183 are arranged in the axial direction of the assembly hole 1111, forming multiple seals and enhancing the sealing effect.

[0074] The third seal 183 can be a sealing ring or a sealing strip. When the third seal 183 is a sealing ring and provided with multiple third seals 183, the multiple third seals 183 are arranged in the axial direction of the assembly hole 1111, forming multiple seals and enhancing the sealing effect.

[0075] When the third seal 183 is a sealing strip, the third seal 183 extends in a spiral around the axial direction of the assembly hole 1111, forming multiple seals and enhancing the sealing effect.

[0076] When the third seal 183 is a sealing strip and provided with multiple third seals 183, the multiple third seals 183 are arranged in a spiral and spaced apart in the axial direction of the assembly hole 1111, further forming multiple seals and enhancing the sealing effect.

[0077] The number of third seals 183 can be determined according to the axial length of the assembly hole 1111.

[0078] The third seal 183 can be a rubber or silicone part.

[0079] In some embodiments, as shown in Figure 3 and Figure 4 The expansion beam 111 is provided with a third sealing groove on the side facing the first connecting portion 122, and the third sealing groove is used to place the third seal 183.

[0080] The third sealing groove is used to place the third seal 183, and the third sealing groove is used to limit and fix the third seal ring to reduce the displacement of the third seal 183.

[0081] The third sealing groove can be an annular groove extending in the circumferential direction of the assembly hole 1111, and the number and diameter of the third sealing groove are matched with the third seal 183 to increase the sealing effect between the first connecting portion 122 and the assembly hole 1111.

[0082] When the third sealing groove is provided with multiple third sealing grooves, the multiple third sealing grooves are arranged in the axial direction of the assembly hole 1111 to fix the multiple third seals 183.

[0083] In some embodiments, the electrical connection assembly further comprises a front cover, the front cover is penetrated through the penetrating hole 14, the front cover is arranged on the first cover 12, and the front cover is in sealing connection with the first cover 12, so as to further enhance the sealing performance between the expansion beam 111 and the electrical connection assembly.

[0084] In some embodiments, at least one fifth sealing member is arranged between the front cover and the first cover 12, and the front cover and the first cover 12 are sealed through the at least one fifth sealing member.

[0085] In some embodiments, as shown in Figure 3 and Figure 4 , the first blocking portion 121 of the first cover 12 is provided with at least one fifth sealing groove on the side away from the expansion beam 111, and the fifth sealing groove is used for fixing the fifth sealing member.

[0086] The fifth sealing groove is used for placing the fifth sealing member, and the fifth sealing groove is used for limiting and fixing the fifth sealing ring, so as to reduce the displacement of the fifth sealing member.

[0087] The fifth sealing groove can be an annular groove extending circumferentially along the penetrating hole 14, and the number and diameter of the fifth sealing groove are matched with the fifth sealing member, so as to increase the sealing effect between the front cover and the first cover 12.

[0088] When there are a plurality of fifth sealing grooves, the plurality of fifth sealing grooves are arranged in the axial direction of the assembly hole 1111 and are spaced apart, so as to fix the plurality of fifth sealing members.

[0089] In some embodiments, as shown in Figure 3 and Figure 4 , at least one fourth sealing member 184 is arranged between the second cover 13 and the rear side of the expansion beam 111.

[0090] The fourth sealing member 184 can be one or more, and the fourth sealing member 184 is arranged between the second cover 13 and the rear side of the expansion beam 111. When there are a plurality of fourth sealing members 184, the plurality of fourth sealing members 184 are arranged in the radial direction of the assembly hole 1111 and are spaced apart, so as to form multiple seals and enhance the sealing effect.

[0091] The number of fourth sealing members 184 can be determined according to the axial length of the assembly hole 1111.

[0092] The fourth sealing member 184 can be a rubber ring or a silica gel ring.

[0093] In some embodiments, the side of the expansion beam 111 facing the second cover 13 is provided with a fourth sealing groove for placing the fourth sealing member 184

[0094] The fourth sealing groove is used for placing the fourth sealing member 184, and the fourth sealing groove is used for limiting and fixing the fourth sealing ring, so as to reduce the displacement of the fourth sealing member 184.

[0095] The fourth sealing groove can be an annular groove extending circumferentially along the assembly hole 1111, and the number and diameter of the fourth sealing groove are matched with the fourth sealing member 184, so as to increase the sealing effect between the rear side of the expansion beam 111 and the side surface of the second cover 13.

[0096] When the fourth sealing groove is a plurality of fourth sealing grooves, the plurality of fourth sealing grooves can be arranged at intervals along the radial direction of the assembly hole 1111, so as to fix the plurality of fourth sealing members 184.

[0097] In some embodiments, the length of the first connecting portion 122 along the axial direction is not greater than the length of the assembly hole 1111 along the axial direction, and the length of the first connecting portion 122 along the axial direction can be equal to or less than the length of the assembly hole 1111 along the axial direction.

[0098] The rear side of the expansion beam 111 and the second cover 13 can be tightly fitted, the distance between the rear side of the expansion beam 111 and the second cover 13 can be reduced, and the sealing effect between the rear side of the expansion beam 111 and the second cover 13 can be improved.

[0099] In some embodiments, as shown in Figure 3 and Figure 4 The second cover 13 includes a second blocking portion 131, the second blocking portion 131 is sealingly connected with the rear side of the expansion beam 111, and the projection of the assembly hole 1111 along the axial direction falls within the projection of the second blocking portion 131.

[0100] The first blocking portion 121 and the second blocking portion 131 are separately arranged on the two sides of the expansion beam 111, the second connecting portion 132 is arranged on the side of the second blocking portion 131 away from the expansion beam 111, and the projection of the through hole 14 falls within the projection of the first blocking portion 121 and the second blocking portion 131.

[0101] In the present embodiment, by arranging the second blocking portion 131 and the projection of the assembly hole 1111 along the axial direction falling within the projection of the second blocking portion 131, the second cover 13 and the rear side of the expansion beam 111 can have a coincident surface to form a sealing section, the connecting gap between the second blocking portion 131, the first connecting portion 122, the first blocking portion 121 and the expansion beam 111 can have a plurality of sections with bends, so as to form a labyrinth seal, reduce the leakage of the liquid cooling medium from the connecting gap between the second blocking portion 131, the first connecting portion 122, the first blocking portion 121 and the expansion beam 111, and enhance the connection sealing performance of the first cover 12 and the second cover 13 with the expansion beam 111 respectively.

[0102] The second cover 13 further comprises a second connecting portion 132, which is arranged on the side of the second blocking portion 131 away from the expansion beam 111. The arrangement of the second connecting portion 132 can extend the length of the through hole 14, thereby extending the area of the sealed connection between the through hole 14 and the electrical connecting member 15, and improving the sealing effect between the through hole 14 and the electrical connecting member 15.

[0103] The second blocking portion 131 is sealingly connected to the expansion beam 111, and at least one fourth sealing member 184 can be arranged between the second blocking portion 131 and the rear side of the expansion beam 111. The second blocking portion 131 is sealingly connected to the expansion beam 111 through the at least one fourth sealing member 184.

[0104] In some embodiments, as shown in Figure 3 and Figure 4 The side of the second connecting portion 132 facing the battery cell is provided with a weight-reducing groove, and the outer peripheral wall of the second connecting portion 132 is provided with a reinforcing rib. This not only achieves the effect of reducing weight, thereby achieving the lightweight of the battery device 1, but also improves the structural strength of the second connecting portion 132.

[0105] In some embodiments, the first cover 12 is provided with a first hole portion 141, and the second cover 13 is provided with a second hole portion 142. The first hole portion 141 and the second hole portion 142 are arranged in alignment to form the through hole 14. The electrical connecting member 15 is arranged in the first hole portion 141 and the second hole portion 142. The hole shape and hole diameter of the first hole portion 141 and the second hole portion 142 are adapted to the electrical connecting member 15.

[0106] At least one of the first hole portion 141 and the second hole portion 142 is sealingly connected to the electrical connecting member 15.

[0107] In this embodiment, the first hole portion 141 and the second hole portion 142 can be sealingly connected to the electrical connecting member 15, or the first hole portion 141 can be sealingly connected to the electrical connecting member 15, or the first hole portion 141 can be sealingly connected to the electrical connecting member 15.

[0108] The electrical connecting member 15 is arranged in the first hole portion 141 and the second hole portion 142 and is sealingly connected to at least one of the first hole portion 141 and the second hole portion 142. The electrical connecting member 15 and the first hole portion 141 and the second hole portion 142 can be sealingly connected through a sealing member, a mechanical seal, or a labyrinth seal, so as to reduce the risk of leakage of the liquid cooling medium in the first cavity 112 from the connection between the electrical connecting member 15 and the through hole 14.

[0109] In some embodiments, at least one first sealing member 181 is arranged between the first hole portion 141 and the electrical connector 15, and the first sealing member 181 can be one or more. The first sealing member 181 is arranged between the first hole portion 141 and the electrical connector 15, and the first hole portion 141 and the electrical connector 15 are sealed by the first sealing member 181.

[0110] When the first sealing member 181 is provided in multiple, the multiple first sealing members 181 are arranged along the axial direction of the first hole portion 141, forming a multiple sealing, and enhancing the sealing effect.

[0111] The first sealing member 181 can be a sealing ring or a sealing strip. When the first sealing member 181 is a sealing ring and provided in multiple, the multiple first sealing members 181 are arranged along the axial direction of the first hole portion 141, forming a multiple sealing, and enhancing the sealing effect.

[0112] When the first sealing member 181 is a sealing strip, the first sealing member 181 is arranged in a spiral around the axial direction of the first hole portion 141, forming a multiple sealing, and enhancing the sealing effect.

[0113] When the first sealing member 181 is a sealing strip and provided in multiple, the multiple first sealing members 181 are arranged in a spiral around the axial direction of the assembly hole 1111 and are spaced apart, further forming a multiple sealing, and enhancing the sealing effect.

[0114] The number of first sealing members 181 can be determined according to the axial length of the first hole portion 141.

[0115] The first sealing member 181 can be a rubber member or a silica gel member.

[0116] In some embodiments, as shown in Figure 3 and Figure 4 Figure 3 Figure 4 The first hole portion 141 is provided with at least one first sealing groove for placing the first sealing member 181. The first sealing groove is used for limiting and fixing the first sealing ring, so as to reduce the displacement of the first sealing member 181.

[0117] The first sealing groove can be an annular groove extending along the circumferential direction of the first hole portion 141. The number and diameter of the first sealing groove are matched with the first sealing member 181, so as to increase the sealing effect between the first hole portion 141 and the electrical connector 15.

[0118] When the first sealing groove is provided in multiple, the multiple first sealing grooves are arranged along the axial direction of the first hole portion 141, so as to fix the multiple first sealing members 181.

[0119] In some embodiments, the first stop portion 121 and the second stop portion 131 can be connected to the expansion beam 111 by a fastener 16, and the fastener 16 can be a bolt or a screw.

[0120] The fasteners 16 can include a plurality of fasteners 16, and the first stop portion 121 and the second stop portion 131 can be connected to the expansion beam 111 through the plurality of fasteners 16 and the expansion beam 111, thereby increasing the stability of the connection and reducing the relative displacement between the first stop portion 121 and the expansion beam 111 and the relative displacement between the second stop portion 131 and the expansion beam 111 due to thermal expansion.

[0121] According to the battery device 1 provided by the embodiments of the present application, the first cover 12 and the second cover 13 are provided, the first cover 12 and the second cover 13 are provided with the through hole 14, the first cover 12 and the second cover 13 are in sealed connection with the expansion beam 111, a plurality of sealed surfaces in a plurality of bending sections can be formed, the electrical connector 15 is arranged in the through hole 14 and in sealed connection with the through hole 14, and the axial length of the sealed connection between the through hole 14 and the electrical connector 15 can be extended, so that the sealing performance of the first cavity 112 and the second cavity 113 of the battery device 1 can be improved, the risk of leakage of the liquid cooling medium from the assembly hole 1111 of the expansion beam 111 can be reduced, and the reliability and stability of the product during use can be improved.

[0122] According to some embodiments of the present application, the present application further provides a vehicle comprising the battery device 1 of any of the above embodiments.

[0123] According to some embodiments of the present application, the present application further provides an energy storage device comprising the battery device 1 of any of the above embodiments, and the battery device 1 is used for storing or providing electric energy.

[0124] According to some embodiments of the present application, the present application further provides an energy storage system, which comprises: a power conversion device and the energy storage device of any of the above embodiments, and the power conversion device is used for electrically connecting a power generation device and the energy storage device.

[0125] According to some embodiments of the present application, the present application further provides a power consumption device. The power consumption device comprises the battery monomer of any of the above embodiments, and the battery monomer is used for storing or providing electric energy; or the power consumption device comprises the battery device 1 of any of the above embodiments, and the battery device 1 is used for storing or providing electric energy; or the power consumption device comprises the energy storage device of any of the above embodiments, and the battery monomer or the battery device 1 is used for storing or providing electric energy; or the power consumption device comprises the energy storage system of any of the above embodiments, and the battery monomer or the battery device 1 is used for storing or providing electric energy.

[0126] The power consumption device can be a device or a system of any of the above application battery devices 1.

[0127] If not particularly stated, all the embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions.

[0128] If there is no special indication, all the technical features and optional technical features of the present application can be combined with each other to form new technical solutions.

[0129] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The battery device comprises: a box body; an expansion beam installed in the box body and forming a first cavity for accommodating battery monomers and a second cavity for accommodating a distribution box with an assembly hole communicating the first cavity and the second cavity; a first cover and a second cover formed with a through hole communicating the first cavity and the second cavity, the first cover being installed in the assembly hole and being sealingly connected with the expansion beam, and the second cover being arranged at the rear side of the expansion beam and being sealingly connected with the expansion beam; an electrical connector passing through the through hole and being sealingly connected with the through hole.

2. The battery device according to claim 1, characterized by The first cover comprises a first blocking part and a first connecting part, the first connecting part being arranged in the assembly hole, and the first blocking part being arranged at the front side of the expansion beam. Along the axial direction of the assembly hole, the projection of the assembly hole falls within the projections of the first blocking part and the second cover.

3. The battery device of claim 2, wherein At least one second sealing member is arranged between the first blocking part and the front side of the expansion beam; and / or, At least one third sealing member is arranged between the first connecting part and the assembly hole; and / or, At least one fourth sealing member is arranged between the second cover and the rear side of the expansion beam.

4. The battery device of claim 3, wherein The side of the expansion beam facing the first blocking part is provided with a second sealing groove for placing the second sealing member; and / or, The side of the expansion beam facing the first connecting part is provided with a third sealing groove for placing the third sealing member; and / or, The side of the expansion beam facing the second cover is provided with a fourth sealing groove for placing the fourth sealing member.

5. The battery device of claim 1, wherein The second cover comprises a second blocking part and a second connecting part, the second blocking part being sealingly connected with the rear side of the expansion beam, and the second connecting part being arranged on the side of the second blocking part away from the expansion beam, and the projection of the assembly hole along the axial direction falling within the projection of the second blocking part.

6. The battery device according to any one of claims 1 to 5, wherein The first cover is provided with a first hole part, and the second cover is provided with a second hole part, the first hole part and the second hole part being arranged in position to form the through hole, and the electrical connector passing through the first hole part and the second hole part; At least one of the first hole part and the second hole part is sealingly connected with the electrical connector.

7. The battery device of claim 6, wherein At least one first sealing member is arranged between the first hole part and the electrical connector.

8. The battery device of claim 7, wherein, The first hole part is provided with at least one first sealing groove for placing the first sealing member.

9. A vehicle characterized by comprising: The battery device comprises any one of claims 1-8.

10. An energy storage device, characterized by, The battery device comprises any one of claims 1-8.

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