Battery device and electric device

Abstract

The utility model is applicable to the technical field of batteries, and provides a battery device and a power utilization device.The battery device comprises a box body and a battery monomer assembly, the box body comprises a first box body, a second box body, a pressing strip and an equipotential connecting structure, and the second box body and the first box body are connected and jointly define a containing space for containing the battery monomer assembly; the pressing strip is fixedly connected to the side, away from the second box body, of the first box body, a first mounting hole is formed in the pressing strip, the equipotential connecting structure comprises a first connecting piece and a second connecting piece, the first connecting piece penetrates through the first mounting hole and is connected to the pressing strip and the first box body, and the pressing strip and the first box body are electrically conducted through the first connecting piece; the second connecting piece is connected to the pressing strip and the second box body, and the pressing strip and the second box body are electrically conducted through the second connecting piece. According to the battery device provided by the embodiment of the invention, equipotential connection between the first box body and the second box body can be stably realized, the reliability of the battery device is improved, and the cost of the first box body and the battery device is reduced.

Description

TECHNICAL FIELD

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

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] In the development of battery technology, how to improve the reliability of the battery is an important research direction in battery technology. CONTENT OF THE INVENTION

[0004] Therefore, the embodiments of the present application provide a battery device and a power utilization device, which can stably realize the equipotential connection of the first box body and the second box body, improve the reliability of the battery device, and reduce the cost of the first box body and the battery device.

[0005] The embodiments of the first aspect of the present application provide a battery device, which comprises a box body and a battery monomer assembly, and the box body comprises: a first box body; a second box body connected with the first box body and together enclosing a containing space for containing the battery monomer assembly; a pressing strip connected to one side of the first box body away from the second box body, the pressing strip being provided with a first mounting hole; and an equipotential connection structure comprising a first connecting piece and a second connecting piece, the first connecting piece being provided in the first mounting hole, the first connecting piece being connected to the pressing strip and the first box body, and the first connecting piece electrically conducting the pressing strip and the first box body; and the second connecting piece being fixedly connected to the pressing strip and the second box body, and the second connecting piece electrically conducting the pressing strip and the second box body.

[0006] In the battery device provided by the embodiments of the present application, the first box body, the first connecting piece, the pressing strip, the second connecting piece and the second box body form a conductive path, so that the first box body and the second box body are reliably connected in equipotential, thereby improving the reliability of the box body and the battery device; the first connecting piece can pass through the first mounting hole on the pressing strip and connect the first box body, thereby realizing the functions of installation and electrical conduction, and the first connecting piece occupies less space; since the first connecting piece conducts the potential between the first box body and the pressing strip, the equipotential point for connecting in equipotential with the second box body can be transferred from the first box body to the pressing strip, so that the first box body is not limited to using a galvanized plate or other corrosion-resistant plate, which is conducive to reducing the material cost of the first box body and further reducing the cost of the battery device. Therefore, the above-mentioned battery device can stably connect the first box body and the second box body in equipotential, improve the reliability of the battery device, and reduce the cost of the first box body and the battery device.

[0007] In some embodiments, the first connector is a fastener, the first cabinet is provided with a second mounting hole, the first mounting hole is arranged in correspondence with the second mounting hole and is in communication with the second mounting hole, the first connector is arranged through the second mounting hole and the first mounting hole, the first connector is in electrical conduction with the hole wall of the first mounting hole, and the first connector is in electrical conduction with the hole wall of the second mounting hole.

[0008] By adopting the above technical solution, the first connector can be tightly connected with the hole walls of the second mounting hole and the first mounting hole, and the reliability of the equipotential connection between the compression strip and the first cabinet is high.

[0009] In some embodiments, along the length direction of the first connector, the two ends of the first connector are respectively covered with an electrophoretic paint film.

[0010] By adopting the above technical solution, the electrophoretic paint film is used to protect the equipotential connection point on the compression strip, thereby reducing the risk of corrosion at the first connector.

[0011] In some embodiments, on the side close to the second cabinet, the height difference between the end surface of the first connector and the end surface of the first cabinet is less than or equal to 0.1 mm.

[0012] By adopting the above technical solution, the surface of the first connector and the first cabinet is relatively flat, thereby facilitating the application of the electrophoretic paint film on the surface of the first connector, and the corrosion prevention effect is good.

[0013] In some embodiments, the compression strip is provided with a first locking hole for arranging the second connector, the surface of the compression strip away from the second cabinet is provided with a conductive connection area surrounding the first locking hole, and the second connector is attached to the conductive connection area; wherein the surface of the first cabinet is provided with a first electrophoretic layer, and the first electrophoretic layer exposes the second mounting hole; and / or, the surface of the compression strip is provided with a second electrophoretic layer, and the second electrophoretic layer exposes the conductive connection area and the first mounting hole.

[0014] By adopting the above technical solution, the second connector can be stably attached to the conductive connection area, so that the compression strip can be stably electrically conducted with the second cabinet through the second connector, and the reliability of the equipotential connection is good; at the same time, the first cabinet and / or the compression strip can be subjected to electrophoresis treatment and expose the equipotential points, thereby improving the corrosion prevention effect of the cabinet without affecting the electrical conduction performance.

[0015] In some embodiments, the number of the second mounting hole and the first mounting hole is multiple, and the compression strip is attached to the first cabinet; wherein the compression strip and the first cabinet are fixedly connected by the multiple first connectors; or, the cabinet further comprises at least one first fastener, the first fastener is arranged through the compression strip and the first cabinet, the compression strip and the first cabinet are fixedly connected by the first connector and the first fastener, and the first electrophoretic layer covers the hole of the first cabinet for arranging the first fastener.

[0016] By adopting the technical scheme, the pressing strip is connected to the first box body by riveting, thereby reducing the risk of the pressing strip falling off, and the pressing strip is closely attached to the first box body without any gap, thereby reducing the risk of the bolt being twisted off.

[0017] In some embodiments, the number of the first mounting holes is at least three; along the length direction of the pressing strip, the spacing between adjacent first mounting holes is not all equal.

[0018] By adopting the technical scheme,

[0019] In some embodiments, the second connecting piece includes a bolt and a pull-in nut, the pull-in nut is fixed to the second box body and electrically connected to the second box body;

[0020] One end of the bolt is in abutment with and electrically connected to the pressing strip, and the other end of the bolt is threadedly connected to and electrically connected to the pull-in nut.

[0021] By adopting the technical scheme, the design of the first mounting hole plays a foolproof role, improves the assembly efficiency, and reduces the risk of equal potential connection failure caused by incorrect assembly of the pressing strip.

[0022] In some embodiments, the second box body is provided with a second locking hole, the pull-in nut includes a nut head and a nut rod portion with an internal thread, the nut rod portion is arranged in the second locking hole, and the nut rod portion has a clamping flange; the nut head and the clamping flange are respectively in abutment with and electrically connected to the two sides of the second box body.

[0023] By adopting the technical scheme, the second connecting piece plays a mechanical fixing role, and the second connecting piece can stably connect the pressing strip and the second box body in equal potential, and the connection strength of the bolt and the pull-in nut is high, and the maintenance convenience is good.

[0024] In some embodiments, the box body further includes a sealing piece, and the sealing piece and the nut head are clamped between the first box body and the second box body.

[0025] By adopting the technical scheme, the sealing piece can seal and connect the first box body and the second box body, thereby reducing the risk of corrosion and equal potential failure of the second connecting piece.

[0026] In some embodiments, the box body further includes a plurality of second fasteners, and the first box body and the second box body are fixedly connected by the at least one second connecting piece and the plurality of second fasteners.

[0027] By adopting the technical scheme, the first box body and the second box body are fixedly connected by the at least one second connecting piece and the plurality of second fasteners, and the second connecting piece and the second fastener can be assembled at the same time, thereby improving the assembly efficiency.

[0028] In some embodiments, the pressing strip is fixedly connected with the first box body by at least one of bonding, welding and riveting.

[0029] By adopting the technical scheme, the pressing strip is connected to the first box body at the same potential through the first connecting piece, and the pressing strip can be fixed to the first box body in multiple ways, so that the assembly mode is flexible.

[0030] In some embodiments, the pressing strip is a stainless steel plate or an aluminum plate.

[0031] By adopting the technical scheme, the corrosion resistance of the pressing strip is good.

[0032] In some embodiments, the first box body is provided with a first sealing edge, the second box body is provided with a second sealing edge, the second sealing edge is arranged in a laminated manner with the first sealing edge, the pressing strip is fixed on the first sealing edge, the first connecting piece is fixed on the pressing strip and the first sealing edge, and the second connecting piece is fixed on the first sealing edge and the second sealing edge at the same time.

[0033] By adopting the technical scheme, the sealing performance of the box body is good.

[0034] Embodiments of the second aspect of the application provide a power utilization device, which comprises the battery device of the first aspect, and the battery device is used for storing or providing electric energy.

[0035] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following will describe the specific embodiments of the application. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical scheme in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or conventional technical description, obviously, the drawings in the following description are only some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creating laborious work.

[0037] Figure 1 is a structural schematic diagram of a vehicle provided by some embodiments of the application;

[0038] Figure 2 is an exploded view of a battery device provided by some embodiments of the application;

[0039] Figure 3 is a top view of the battery device provided by some embodiments of the application;

[0040] Figure 4 is Figure 3 the local schematic diagram of the battery device shown.

[0041] Figure 5 is a sectional view of the battery device shown in FIG. 1 along the line A-A; Figure 4

[0042] Figure 6 is a sectional view of the battery device shown in FIG. 1 along the first connecting member; Figure 4

[0043] Figure 7 is an enlarged view of the portion B in the battery device shown in FIG. 1; Figure 5

[0044] Figure 8 is a perspective exploded schematic view of the battery device shown in FIG. 1; Figure 3

[0045] Figure 9 is a partial schematic view of the first box in the battery device shown in FIG. 1; Figure 3

[0046] Figure 10 is a perspective schematic view of the pressing strip in the battery device shown in FIG. 1; Figure 3

[0047] Figure 11 is a plan view of the pressing strip shown in FIG. 1. Figure 10 The meanings of the marks in the figures are as follows:

[0048] 1000, vehicle; 100, battery device; 10, box; 20, battery cell assembly; 11, first box; 111, second mounting hole; 112, third locking hole; 113, first sealing edge; 12, second box; 121, second locking hole; 122, second sealing edge; 13, pressing strip; 131, first mounting hole; 132, first locking hole; 133, conductive connecting area; 134, second electrophoretic layer; 14, equipotential connecting structure; 141, first connecting member; 142, second connecting member; 1421, bolt; 1422, pull-rivet nut; 14221, nut head; 14222, nut stem; 14223, clamping flange; 15, sealing member; 16, first fastener; 17, second fastener.

[0049] DETAILED DESCRIPTION The embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0050]

[0051] ​​​​​​​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 this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise noted, the terms "including" and "comprising" are open-ended and do not exclude the presence of unrecited elements or limitations.

[0052] 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.

[0053] 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 is not necessarily all referring to the same embodiment, or to a particular embodiment, or to a particular set of embodiments. It will be explicitly understood by those of ordinary skill in the art that the embodiments described herein can be combined with other embodiments.

[0054] 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.

[0055] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0056] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0057] In the description of the embodiments of the present application, unless specifically defined and limited, the terms "mount", "connect", "connect", "fix", and other terms should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or 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.

[0058] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined to form new technical solutions.

[0059] Unless otherwise specified, all technical features and optional technical features of the present application can be combined to form new technical solutions.

[0060] The battery device includes a box body and a battery monomer arranged in the box body. The box body includes a first box body and a second box body. The first box body and the second box body are connected in an equipotential manner, which is a key measure to ensure safe and reliable operation of the battery in a high-voltage environment. Through the equipotential connection, the risk of discharge, electric shock and electromagnetic interference can be effectively reduced, and the reliability of the battery device can be improved.

[0061] At present, the first box body is provided with an equipotential point for equipotential connection with the second box body. The first box body needs to be subjected to electrophoresis treatment to form an electrophoresis layer to isolate environmental erosion, and at the same time, the equipotential point needs to be subjected to electrophoresis shielding to meet the requirement of electrical conduction. In order to avoid corrosion of the equipotential point, the first box body needs to use a zinc-plated plate or other corrosion-resistant plate. However, the material cost of the zinc-plated plate or other corrosion-resistant plate is relatively high, resulting in a relatively high material cost of the first box body.

[0062] Therefore, the embodiments of the present application provide a battery device which can realize equipotential connection between the first box body and the second box body at a lower cost and improve the reliability of the battery device.

[0063] The battery device provided by the embodiments of the present application includes a box body and a battery monomer assembly. The box body includes a first box body, a second box body, a pressing strip, and an equipotential connection structure. The pressing strip is fixedly connected to the first box body. The equipotential connection structure includes a first connecting piece and a second connecting piece. The first connecting piece is fixedly connected to the pressing strip and the first box body, and electrically connects the pressing strip and the first box body. The second connecting piece is fixedly connected to the pressing strip, the first box body, and the second box body, and electrically connects the pressing strip and the second box body.

[0064] The battery device provided by the embodiments of the present application has a conductive path formed between the first box body, the first connecting piece, the pressing strip, the second connecting piece and the second box body, so that the first box body and the second box body are connected in an equipotential manner, thereby improving the reliability of the box body and the battery device. Since the first connecting piece connects the electric potential between the first box body and the pressing strip, the equipotential point for connecting the second box body in an equipotential manner can be transferred from the first box body to the pressing strip, so that the first box body is not limited to using a corrosion-resistant plate such as a galvanized plate, which is conducive to reducing the cost of the first box body and further reducing the cost of the battery device. Therefore, the battery device provided by the above embodiments can stably achieve the equipotential connection between the first box body and the second box body, improve the reliability of the battery device, and reduce the cost of the first box body and the battery device.

[0065] The technical solutions described in the embodiments of the present application are suitable for battery devices and electric devices using the battery devices.

[0066] In the embodiments of the present application, the battery monomer can be a secondary battery, which refers to a battery monomer that can be activated by charging after discharging.

[0067] The battery monomer can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., and the present application is not limited thereto.

[0068] The battery device disclosed in the embodiments of the present application can be used in electric devices using the battery device as a power source or various energy storage systems using the battery device as an energy storage element. The electric device is, for example, a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric toy, an electric tool, a vehicle, a ship and a spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0069] The following embodiments are described by taking a vehicle as an example for convenience of description.

[0070] Please refer to Figure 1 , Figure 1A structural schematic diagram of a vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle, 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 apparatus 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery apparatus 100 can be used for power supply of the vehicle 1000, for example, the battery apparatus 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 being used to control the battery apparatus 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation and driving.

[0071] In some embodiments of the present application, the battery apparatus 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a 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.

[0072] Reference Figure 2 , Figure 2 An exploded structural schematic diagram of the battery apparatus 100 is provided for some embodiments of the present application. The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies 20 for providing voltage and capacity. The battery cell assembly 20 can include a plurality of battery cells connected in series, parallel or mixed connection through busbars. The battery cell is the smallest unit of the battery apparatus, which includes a shell, an end cover, an electrode assembly and other functional components.

[0073] In some embodiments, the plurality of battery cells in the battery apparatus 100 can be electrically connected through busbars to realize parallel, series or mixed connection of the plurality of battery cells in the battery apparatus 100.

[0074] In some embodiments, the battery cell assembly 20 is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly 20 can be a battery module 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.

[0075] In some embodiments, the battery apparatus 100 can be a battery pack, which includes a box body 10 and one or more battery cell assemblies 20, the battery cell assemblies 20 being accommodated in the box body 10.

[0076] As an example, the battery cell assembly 20 can be a battery module, and the battery cell assembly 20 can be accommodated in the box 10 by fixing the battery module in the box 10.

[0077] As an example, the battery cell assembly 20 can also be accommodated in the box 10 by fixing a plurality of battery cells directly to the box 10.

[0078] As an example, the box 10 can include a first box 11 and a second box 12. The first box 11 and the second box 12 are buckled so that a closed accommodation cavity is formed inside the box 10 to accommodate the battery cell assembly 20. Here, closed means covered or closed, which can be sealed or unsealed.

[0079] As an example, the box 10 can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are connected with the frame, so that a closed accommodation cavity is formed inside the box 10 to accommodate the battery cell assembly 20.

[0080] As an example, the box 10 can be part of the chassis structure of the vehicle 1000. For example, the top cover of the box 10 can be at least part of the floor of the vehicle 1000, or the frame of the box 10 can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0081] In some embodiments, the battery device 100 refers to an energy storage device, and the energy storage device includes the box 10, 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.

[0082] Embodiments of the first aspect of the application provide a battery device 100. Please refer to Figures 2 to 7 The battery device 100 includes a box 10 and a battery cell assembly 20. The box 10 includes a first box 11, a second box 12, a compression strip 13, and an equipotential connection structure 14. The second box 12 is connected with the first box 11 and together encloses an accommodation space for the battery cell assembly 20. The compression strip 13 is fixedly connected to one side of the first box 11 away from the second box 12. The equipotential connection structure 14 includes a first connecting piece 141 and a second connecting piece 142. The first connecting piece 141 is connected to the compression strip 13 and the first box 11, and electrically connects the compression strip 13 and the first box 11. The second connecting piece 142 is connected to the compression strip 13 and the second box 12, and electrically connects the compression strip 13 and the second box 12.

[0083] The box 10 includes the first box 11 and the second box 12 connected with each other, and the first box 11 and the second box 12 enclose an accommodation space. In some embodiments, the second box 12 is a tray-shaped box 10, and the first box 11 is a box cover arranged on the second box 12. It can be understood that the first box 11 and the second box 12 can also have other shapes.

[0084] The pressing strip 13 is fixedly connected to the side of the first box body 11 away from the second box body 12, and the pressing strip 13 and the equipotential connection structure 14 can equipotentially connect the first box body 11 and the second box body 12. It can be understood that the pressing strip 13 is made of electrically conductive material. In addition, the pressing strip 13 can apply a pressure to the first box body 11 towards the second box body 12, thereby improving the ability of the box body 10 to resist vibration and impact. For example, the pressing strip 13 is in the shape of a strip and is fixed to one side of the first box body 11. It can be understood that the pressing strip 13 can also have other shapes, for example, the pressing strip 13 is in the shape of a ring.

[0085] The equipotential connection structure 14 includes a first connecting piece 141 and a second connecting piece 142, and the number of the first connecting piece 141 and the second connecting piece 142 can be one or more. The first connecting piece 141 and the second connecting piece 142 are both electrically conductive connecting pieces. Please refer to Figure 4 Figure 6 The first connecting piece 141 is connected to the pressing strip 13 and the first box body 11. The first connecting piece 141 can be a metal fastener such as a rivet or a bolt, or an electrically conductive piece such as an electrically conductive column. For example, the pressing strip 13 and the first box body 11 are respectively provided with riveting holes, and the first connecting piece 141 is fixed in the riveting holes of the pressing strip 13 and the first box body 11. The first connecting piece 141 is in electrical conduction with the pressing strip 13 and the first box body 11 at the same time, so that the first connecting piece 141 can electrically conduct the pressing strip 13 and the first box body 11. The first connecting piece 141 simultaneously plays the role of mechanical fixation and electrical conduction.

[0086] The second connecting piece 142 can be a metal fastener such as a rivet or a bolt. Please refer to Figure 5 and Figure 7 The second connecting piece 142 is connected to the pressing strip 13 and the second box body 12, and the second connecting piece 142 plays the role of locking. In addition, the second connecting piece 142 also plays the role of electrically conducting the pressing strip 13 and the second box body 12. For example, the pressing strip 13, the first box body 11 and the second box body 12 are all provided with locking holes, and the second connecting piece 142 is simultaneously provided in the locking holes of the pressing strip 13, the first box body 11 and the second box body 12. The second connecting piece 142 is in electrical conduction with the pressing strip 13 and the second box body 12 at the same time.

[0087] ​In the box 10, the first box 11, the first connecting piece 141, the pressing strip 13, the second connecting piece 142 and the second box 12 form a conductive path, and the first box 11 and the second box 12 can form a reliable equipotential connection. Since the equipotential point for the equipotential connection with the second box 12 is transferred from the first box 11 to the pressing strip 13, in order to obtain a better corrosion prevention effect, the pressing strip 13 can be made of a corrosion-resistant plate such as a galvanized plate, and the first box 11 can not be limited to use a galvanized plate, thereby reducing the amount of corrosion-resistant material used in the box 10 and reducing the cost of the first box 11 and the cost of the battery device 100. The battery device 100 provided in the above embodiment can realize the equipotential connection between the first box 11 and the second box 12 at a lower cost.

[0088] In the battery device 100 provided in the embodiment, the first box 11, the first connecting piece 141, the pressing strip 13, the second connecting piece 142 and the second box 12 form a conductive path, so that the first box 11 and the second box 12 are reliably equipotential connected to improve the reliability of the box 10 and the battery device 100. Since the first connecting piece 141 connects the potential between the first box 11 and the pressing strip 13, the equipotential point for the equipotential connection with the second box 12 can be transferred from the first box 11 to the pressing strip 13, so that the first box 11 is not limited to use a corrosion-resistant plate such as a galvanized plate, which is conducive to reducing the material cost of the first box 11 and thereby reducing the cost of the battery device 100. Optionally, the first box 11 can be made of sheet metal material, which has a lower cost. Therefore, the above battery device 100 can stably equipotential connect the first box 11 and the second box 12, improve the reliability of the battery device 100, and reduce the cost of the first box 11 and the battery device 100.

[0089] In some embodiments, the pressing strip 13 is provided with a first mounting hole 131, and the first connecting piece 141 is arranged in the first mounting hole 131 and connected to the first box 11.

[0090] The first mounting hole 131 is a through hole penetrating the pressing strip 13, and the first connecting piece 141 is arranged in the first mounting hole 131 and can contact and connect the first box 11.

[0091] By using the above technical solution, the first connecting piece 141 can pass through the first mounting hole 131 on the pressing strip 13 and connect the first box 11 to realize the functions of installation and electrical conduction, and the first connecting piece 141 occupies less space.

[0092] In some embodiments, the first connecting member 141 is a fastener, the first box 11 is provided with a second mounting hole 111, the first mounting hole 131 is arranged in correspondence with and in communication with the second mounting hole 111, the first connecting member 141 is arranged through the second mounting hole 111 and the first mounting hole 131, the first connecting member 141 is in electrical conduction with the hole wall of the first mounting hole 131, and the first connecting member 141 is in electrical conduction with the hole wall of the second mounting hole 111.

[0093] In some embodiments, the first connecting member 141 is a rivet, for example, the first connecting member 141 is a straight rod-shaped rivet, which facilitates the accommodation of the first connecting member 141 in the pressing strip 13 and the first box 11, so that the surface of the pressing strip 13 and the first box 11 is flat. It can be understood that the first connecting member 141 can also be a rivet with a rivet cap at one end or other fasteners.

[0094] In some embodiments, the first connecting member 141 is a rivet, and the diameter of the rivet is 2.5mm-3.5mm, the diameter of the rivet is less than or equal to 3.5mm, and the area of the electrophoretic shielding is smaller. Further, the diameter of the rivet can be 2.9mm-3.1mm.

[0095] Before connecting the first box 11 and the pressing strip 13, the first box 11 can be subjected to electrophoresis treatment, and the second mounting hole 111 can be subjected to electrophoretic shielding, so that the inner wall of the second mounting hole 111 can serve as an equipotential connecting surface.

[0096] The pressing strip 13 can also be subjected to electrophoresis treatment in advance, and the first mounting hole 131 can be subjected to electrophoretic shielding, so that the inner wall of the first mounting hole 131 can serve as an equipotential connecting surface. Of course, the pressing strip 13 can also not be subjected to electrophoresis treatment, for example, the pressing strip 13 can achieve the effect of corrosion resistance through the galvanized layer on the surface thereof.

[0097] When the pressing strip 13 is connected to the first box 11, the first connecting member 141 is inserted into the relatively communicating second mounting hole 111 and first mounting hole 131, so that the first connecting member 141 is in contact with and in electrical conduction with the inner walls of the second mounting hole 111 and the first mounting hole 131, so that the first connecting member 141 can equipotentially connect the pressing strip 13 and the first box 11.

[0098] By adopting the above technical solution, the hole walls of the second mounting hole 111 and the first mounting hole 131 serve as the connecting surface in electrical conduction and are in contact with the first connecting member 141, so that the equipotential connection between the pressing strip 13 and the first box 11 is achieved; since the first connecting member 141 can be closely connected with the hole walls of the second mounting hole 111 and the first mounting hole 131, the reliability of the equipotential connection between the pressing strip 13 and the first box 11 is high.

[0099] Optionally, the first connecting member 141 can also be partially embedded in the second mounting hole 111 or the first mounting hole 131, and electrical conduction can also be achieved.

[0100] In other embodiments, the first connecting member 141 can also penetrate the second mounting hole 111 and abut against the surface of the first cabinet 11, or the first connecting member 141 can also penetrate the first mounting hole 131 and abut against the surface of the compression strip 13, to achieve equipotential connection.

[0101] Please refer to Figure 6 In some embodiments, along the length direction of the first connecting member 141, the two ends of the first connecting member 141 are respectively covered with electrophoretic paint film (not shown in the figure). For example, Figure 6 The position shown by the dashed line is used to cover the electrophoretic paint film.

[0102] The length direction of the first connecting member 141 is also the arrangement direction of the first cabinet 11 and the second cabinet 12.

[0103] In the manufacturing process of the battery device 100, after the first connecting member 141 is installed in the second mounting hole 111 and the first mounting hole 131, electrophoretic paint film is respectively made on the two ends of the first connecting member 141 along the length direction thereof by electrophoresis, and the electrophoretic paint film is used to shield the first connecting member 141, the connection between the first connecting member 141 and the surface of the compression strip 13, and the connection between the first connecting member 141 and the surface of the first cabinet 11.

[0104] By setting the electrophoretic paint film on the two ends of the first connecting member 141, the equipotential connection point on the compression strip 13 can be protected by the electrophoretic paint film, the first connecting member 141 is isolated from the environment, the risk of corrosion of the first connecting member 141 is reduced, and the reliability of the equipotential connection between the compression strip 13 and the first cabinet 11 is improved.

[0105] Please refer to Figure 6 and Figure 8 In some embodiments, on the side close to the second cabinet 12, the height difference H between the end surface of the first connecting member 141 and the end surface of the first cabinet 11 is less than or equal to 0.1 mm.

[0106] For example, the first connecting member 141 can protrude from the end surface of the first cabinet 11, or can be flush with the end surface of the first cabinet 11. Optionally, the first connecting member 141 can also be recessed in the second mounting hole 111.

[0107] The height difference H between the end surface of the first connecting member 141 and the end surface of the first cabinet 11 is less than or equal to 0.1 mm, which can make the surface of the first connecting member 141 and the surface of the first cabinet 11 relatively flat, thereby facilitating the electrophoretic paint film on the surface of the first connecting member 141, and the corrosion prevention effect is better.

[0108] Please refer to Figures 4 to 11 In some embodiments, the pressing strip 13 is provided with a first locking hole 132 for the second connecting member 142 to pass through, and the surface of the pressing strip 13 away from the second box 12 is provided with a conductive connecting area 133 surrounding the first locking hole 132, and the second connecting member 142 is attached to the conductive connecting area 133; the surface of the first box 11 is provided with a first electrophoretic layer (not shown in the figure), and the first electrophoretic layer exposes the second mounting hole 111; and / or the surface of the pressing strip 13 is provided with a second electrophoretic layer 134, and the second electrophoretic layer 134 exposes the conductive connecting area 133 and the first mounting hole 131.

[0109] As shown in Figure 10 and Figure 11 , the pressing strip 13 is provided with a first locking hole 132, and the surface of the pressing strip 13 away from the second box 12 is provided with a conductive connecting area 133 surrounding the first locking hole 132, and the conductive connecting area 133 is used for matching with the second connecting member 142, and the second connecting member 142 includes a bolt 1421, then the conductive connecting area 133 is opposite to the nut of the bolt 1421 towards the pressing strip 13; optionally, the conductive connecting area 133 is located inside the orthographic projection of the bolt 1421 towards the pressing strip 13, and the area of the conductive connecting area 133 is smaller than the orthographic projection area of the bolt 1421. For example, the conductive connecting area 133 is an annular area.

[0110] In this way, after the second connecting member 142 passes through the first locking hole 132 on the pressing strip 13, the second connecting member 142 can be electrically conducted with the pressing strip 13 through the conductive connecting area 133.

[0111] Optionally, the surface of the first box 11 is provided with a first electrophoretic layer (not shown in the figure), and the first electrophoretic layer exposes the second mounting hole 111. The first electrophoretic layer is made by electrophoresis, and the second mounting hole 111 is electrophoretically shielded during the making, so that the second mounting hole 111 is not shielded by the electrophoretic layer, and the second mounting hole 111 can be electrically conducted with the pressing strip 13 through the first connecting member 141.

[0112] Optionally, the surface of the pressing strip 13 is provided with a second electrophoretic layer 134, and the conductive connecting area 133 and the first mounting hole 131 are electrophoretically shielded during the making of the second electrophoretic layer 134, so that the conductive connecting area 133 and the first mounting hole 131 are not covered by the second electrophoretic layer 134 and can be used for equipotential connection. Further, since the conductive connecting area 133 surrounds the first locking hole 132, the second electrophoretic layer 134 can also expose the first locking hole 132.

[0113] By adopting the technical scheme, the conductive connection area 133 is located on the surface of the batten 13, the second connecting piece 142 can be stably attached to the conductive connection area 133, so that the batten 13 can realize stable electric conduction with the second tank 12 through the second connecting piece 142, and the reliability of the equipotential connection is good; at the same time, the first tank 11 and / or the batten 13 can be subjected to electrophoresis treatment and expose the equipotential point, thereby improving the anticorrosion effect of the tank 10 without affecting the electric conduction performance.

[0114] Please refer to Figures 3 to 8 In some embodiments, the number of the second mounting holes 111 and the first mounting holes 131 is multiple, the batten 13 is attached to the first tank 11, the tank 10 further comprises at least one first fastener 16, the first fastener 16 is arranged in the batten 13 and the first tank 11, the batten 13 and the first tank 11 are fixedly connected through the first connecting piece 141 and the first fastener 16, and the first electrophoresis layer covers the hole for the first tank 11 to pass through the first fastener 16.

[0115] For example, the number of the second mounting holes 111 and the first mounting holes 131 is three. The batten 13 is attached to the first tank 11, that is, there is no gap between the batten 13 and the first tank 11, thereby reducing the risk of fastener back-off in the tank 10 and improving the reliability of the tank 10.

[0116] As Figure 8 shown, in some embodiments, the first fastener 16 and the first connecting piece 141 are both rivets, but for the convenience of understanding, the rivets only play a fixing role and are referred to as the first fastener 16. The first fastener 16 can also be a bolt or other fastener. The batten 13 is fixedly connected to the first tank 11 through the first fastener 16 and the first connecting piece 141, and since the first fastener 16 does not need to play the role of electric conduction, the first electrophoresis layer covers the second mounting hole 111 for passing through the first fastener 16.

[0117] In other embodiments, the batten 13 is fixedly connected to the first tank 11 through a plurality of first connecting pieces 141. Optionally, the plurality of first connecting pieces 141 are all rivets, and each first connecting piece 141 simultaneously plays the roles of mechanical fixation and electric conduction. It can be understood that at this time, the first electrophoresis layer exposes a plurality of second mounting holes 111.

[0118] By adopting the technical scheme, the plurality of first mounting holes 131 are arranged on the pressing strip 13, the pressing strip 13 can be fixedly connected to the first box body 11 through the plurality of first connecting pieces 141 or through the first connecting piece 141 and the first fastener 16, that is, the pressing strip 13 is connected to the first box body 11 in a riveting mode, the risk of falling off of the pressing strip 13 is reduced, and the pressing strip 13 is tightly attached to the first box body 11 without a gap; meanwhile, the first box body 11 is locked to the second box body 12 through the bolt 1421, and since there is no gap between the pressing strip 13 and the first box body 11, the risk of falling off of the bolt 1421 is reduced. In addition, the pressing strip 13 is connected to the first box body 11 in a riveting mode, the assembly efficiency is high, and the process cost is low.

[0119] Please refer to Figure 4 、 Figure 8 、 Figure 10 and Figure 11 In some embodiments, the number of the first mounting holes 131 is at least three, and the intervals between adjacent first mounting holes 131 along the length direction of the pressing strip 13 are not all equal.

[0120] For example, the number of the first mounting holes 131 is three, and the middle first mounting hole 131 is used for electrical conduction. As shown in the figure, along the length direction of the pressing strip 13, the interval between the middle first mounting hole 131 and the first mounting hole 131 at one end of the pressing strip 13 is D1, the interval between the middle first mounting hole 131 and the first mounting hole 131 at the other end of the pressing strip 13 is D2, and D1 is not equal to D2. Further optionally, the three first mounting holes 131 can be arranged in a triangular shape, further improving the fool-proof effect. Figure 11

[0121] It can be understood that the number of the first mounting holes 131 can also be more than three, and the intervals between adjacent first mounting holes 131 are not all equal.

[0122] It can be understood that the second mounting holes 111 are arranged in one-to-one correspondence with the first mounting holes 131, and the intervals between adjacent second mounting holes 111 are also not all equal.

[0123] By adopting the technical scheme, in the process of installing the pressing strip 13 on the first box body 11, the installation surface and the installation direction of the pressing strip 13 can be confirmed by identifying the first mounting holes 131, the design of the first mounting holes 131 plays a fool-proof role, the assembly efficiency is improved, and the risk of failure of equipotential connection caused by incorrect assembly of the pressing strip 13 is reduced.

[0124] Please refer to Figure 5 、 Figure 7 ​In some embodiments, the second connecting piece 142 includes a bolt 1421 and a pull rivet nut 1422, the pull rivet nut 1422 is fixed to the second box body 12 and electrically connected with the second box body 12; one end of the bolt 1421 abuts against and is electrically connected with the pressing strip 13, and the other end of the bolt 1421 is threadedly connected with and electrically connected with the pull rivet nut 1422.

[0125] The pull rivet nut 1422 is also called a rivet nut or a press-in rivet nut, and has the advantages of one-sided installation and high strength. The pull rivet nut 1422 is fixed to the second box body 12 and electrically connected with the second box body 12.

[0126] One end of the bolt 1421 is located on the side of the pressing strip 13 away from the second box body 12 and abuts against the pressing strip 13, specifically, the bolt 1421 abuts against the conductive connecting area 133 on the pressing strip 13, so that the bolt 1421 can be electrically connected with the pressing strip 13; the other end of the bolt 1421 is threadedly connected with and electrically connected with the pull rivet nut 1422 on the second box body 12, forming a conductive path from the pressing strip 13 to the bolt 1421, from the bolt 1421 to the pull rivet nut, and from the pull rivet nut to the second box body 12, realizing electrical connection between the pressing strip 13 and the second box body 12, and further realizing electrical connection between the first box body 11 and the second box body 12.

[0127] The head of the bolt 1421 has a flange surface, and / or the head of the bolt 1421 is provided with a gasket, the bolt 1421 abuts against the pressing strip 13 through the flange surface or the gasket, forming stable electrical connection.

[0128] The second connecting piece 142 provided by the embodiments of the present application includes the bolt 1421 and the pull rivet nut 1422, on the one hand, the second connecting piece 142 plays a role of mechanical fixation, and on the other hand, the second connecting piece 142 can stably connect the pressing strip 13 and the second box body 12 at the same potential, and the connection strength of the bolt 1421 and the pull rivet nut 1422 is high, and the maintenance convenience is good.

[0129] In some embodiments, the second box body 12 is provided with a second locking hole 121, the pull rivet nut 1422 includes a nut head 14221 and a nut rod portion 14222 with an internal thread, the nut rod portion 14222 is arranged in the second locking hole 121, and the nut rod portion 14222 has a clamping flange 14223; the nut head 14221 and the clamping flange 14223 respectively abut against and are electrically connected with the two sides of the second box body 12.

[0130] The pressing strip 13 is provided with a first locking hole 132, the second box body 12 is provided with a second locking hole 121, and the first box body 11 is provided with a third locking hole 112, so as to jointly arrange the second connecting piece 142.

[0131] The pull-rivet nut 1422 comprises a nut head 14221 and a nut rod 14222, the nut rod 14222 has a clamping flange 14223, which is a flange formed by the nut rod 14222 during installation of the pull-rivet nut 1422. Along the thickness direction (Z direction in the figure) of the box 10, the nut head 14221 and the clamping flange 14223 respectively abut and electrically conduct with the two sides of the second box 12, which improves the installation strength of the pull-rivet nut 1422 and the reliability of the equipotential connection. Optionally, the nut head 14221 and the clamping flange 14223 respectively abut the edges of the second box 12.

[0132] The nut rod 14222 has an internal thread, and the bolt 1421 has an external thread. After the bolt 1421 is installed in the nut rod 14222, the threaded connection surface serves as an equipotential connection surface, which also improves the reliability of the equipotential connection.

[0133] By adopting the above technical solutions, the nut head 14221 and the clamping flange 14223 are clamped on the two sides of the second box 12, the pull-rivet nut 1422 is in equipotential connection with the second box 12, and the pull-rivet nut 1422 is also in equipotential connection with the bolt 1421 through the internal thread. The first connecting piece 141 can be stably installed on the batten 13, the first box 11 and the second box 12, which improves the reliability of the equipotential connection.

[0134] In some embodiments, the box 10 further comprises a sealing piece 15, and the sealing piece 15 and the nut head 14221 are clamped between the first box 11 and the second box 12.

[0135] The sealing piece 15 can be a gasket, a sealing ring, etc. The sealing piece 15 can be an annular piece or a strip-shaped piece. The sealing piece 15 and the nut head 14221 are clamped between the first box 11 and the second box 12, and the sealing piece 15 can seal and connect the first box 11 and the second box 12, which reduces the risk of corrosion and equipotential failure of the second connecting piece 142.

[0136] In some embodiments, the box 10 further comprises a plurality of second fasteners 17, and the first box 11 and the second box 12 are fixedly connected through at least one second connecting piece 142 and the plurality of second fasteners 17.

[0137] The plurality of second fasteners 17 are spaced apart along the circumferential sides of the first box 11 and the second box 12. Optionally, the second fastener 17 has the same structure as the second connecting piece 142, and the second fastener 17 also comprises a bolt 1421 and a pull-rivet nut 1422.

[0138] Optionally, the number of second connectors 142 may be one or more. When the number of second connectors 142 is multiple, each second connector 142 serves as an equipotential connection.

[0139] The first housing 11 and the second housing 12 are fixedly connected by at least one second connector 142 and a plurality of second fasteners 17. The second connector 142 and the second fasteners 17 can be assembled simultaneously, resulting in high assembly efficiency.

[0140] In some embodiments, the pressure strip 13 is fixedly connected to the first housing 11 by at least one of the following methods: bonding, welding, and riveting.

[0141] like Figure 6 As shown, the pressure strip 13 is riveted to the first housing 11. Specifically, the pressure strip 13 is riveted to the first housing 11 via the first connector 141, or via the first connector 141 and the first fastener 16. In this way, the pressure strip 13 is positioned using rivets, which reduces assembly difficulty and increases assembly efficiency.

[0142] In other embodiments, the pressure strip 13 and the first housing 11 can be fixedly connected by adhesive, for example by double-sided tape, with the adhesive avoiding the first mounting hole 131 and the first locking hole 132 on the pressure strip 13. Optionally, the adhesive is divided into multiple segments, with adjacent segments avoiding the first mounting hole 131 and the first locking hole 132.

[0143] The pressure strip 13 and the first housing 11 can also be fixed by welding.

[0144] By adopting the above technical solution, the pressure strip 13 is equipotentially connected to the first housing 11 through the first connector 141. At the same time, the pressure strip 13 can be fixed to the first housing 11 in a variety of ways, and the assembly method is relatively flexible.

[0145] In some embodiments, the pressure strip 13 is a stainless steel plate or an aluminum plate.

[0146] The pressure strip 13 is located on the side of the first housing 11 opposite to the second housing 12, and the pressure strip 13 is provided with a first mounting hole 131 and a first locking hole 132 for equipotential bonding. To improve the corrosion resistance of the pressure strip 13, it can be made of corrosion-resistant materials such as stainless steel or aluminum. Optionally, a second electrophoretic layer 134 can also be provided on the pressure strip 13 to further enhance its corrosion resistance. While the pressure strip 13 is made of corrosion-resistant material, the first housing 11 is not limited to using corrosion-resistant materials, thus reducing the amount of corrosion-resistant material used and consequently lowering the material cost of the housing 10.

[0147] In some embodiments, the first box 11 is provided with a first sealing edge 113, the second box 12 is provided with a second sealing edge 122, the second sealing edge 122 is stacked with the first sealing edge 113, the pressing strip 13 is fixed on the first sealing edge 113, the first connecting piece 141 is fixed on the pressing strip 13 and the first sealing edge 113, and the second connecting piece 142 is fixed on the first sealing edge 113 and the second sealing edge 122.

[0148] The first sealing edge 113 and the second sealing edge 122 are located outside the containing space, the pressing strip 13 and the first connecting piece 141 are fixed on the first sealing edge 113, the second connecting piece 142 is fixed on the first sealing edge 113 and the second sealing edge 122, the equipotential connection of the first box 11 and the second box 12 is realized, the sealing performance of the box 10 is better, and in addition, the first fastener 16 and the second fastener 17 are also fixed on the first sealing edge 113 and the second sealing edge 122, the fixed connection of the first box 11 and the second box 12 is realized.

[0149] Please refer to Figures 2 to 11 Some embodiments of the present application provide a battery device 100, which comprises a box 10 and a battery monomer assembly 20 arranged in the box 10. The box 10 comprises a first box 11, a second box 12, a pressing strip 13 and an equipotential connection structure 14. The second box 12 is connected with the first box 11 and together encloses a containing space containing the battery monomer assembly 20. The pressing strip 13 is fixedly connected to one side of the first box 11 away from the second box 12. The equipotential connection structure 14 comprises a first connecting piece 141 and a second connecting piece 142. The first connecting piece 141 is connected to the pressing strip 13 and the first box 11, and electrically conducts the pressing strip 13 and the first box 11. The second connecting piece 142 is connected to the pressing strip 13, the first box 11 and the second box 12, and electrically conducts the pressing strip 13 and the second box 12. The first connecting piece 141 is a fastener. The first box 11 is provided with a second mounting hole 111. The pressing strip 13 is provided with a first mounting hole 131 corresponding to and communicating with the second mounting hole 111. The first connecting piece 141 is arranged in the second mounting hole 111 and the first mounting hole 131. The first connecting piece 141 is electrically conducted with the hole wall of the second mounting hole 111 and the hole wall of the first mounting hole 131. The second connecting piece 142 comprises a pull rivet nut 1422 and a bolt 1421. The pull rivet nut 1422 is fixed to the second box 12 and electrically conducted with the second box 12. One end of the bolt 1421 is abutted with and electrically conducted with the pressing strip 13. The other end of the bolt 1421 is threadedly connected with and electrically conducted with the pull rivet nut 1422.

[0150] The battery device 100 provided by the above embodiments sequentially forms a conductive path from the first box body 11, the first connecting member 141, the pressing strip 13, the bolt 1421, the pull-rivet nut 1422, and the second box body 12, so that the first box body 11 and the second box body 12 are connected in an equipotential manner. The battery device 100 provided by the above embodiments can form a stable equipotential connection between the first box body 11 and the second box body 12, thereby improving the reliability of the battery device 100 and reducing the cost of the first box body 11 and the cost of the battery device 100.

[0151] The second aspect of the present application provides a power consumption device, which comprises the battery device 100 of the first aspect and is configured to provide power for the power consumption device.

[0152] The power consumption device can be any of the devices or systems described above.

[0153] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that, Includes a housing and battery cell assemblies, the housing comprising: First box; The second housing is connected to the first housing and together they form a space for accommodating the battery cell assembly; A pressure strip is fixedly connected to the side of the first housing that is away from the second housing, and the pressure strip is provided with a first mounting hole; An equipotential bonding structure includes a first connector and a second connector. The first connector passes through the first mounting hole and is connected to the pressure strip and the first housing, and the first connector electrically connects the pressure strip and the first housing. The second connector connects the pressure strip and the second housing, and the second connector electrically connects the pressure strip and the second housing.

2. The battery device as claimed in claim 1, characterized in that, The first connector is a fastener. The first housing is provided with a second mounting hole. The first mounting hole and the second mounting hole are correspondingly provided and connected. The first connector passes through the second mounting hole and the first mounting hole. The first connector is electrically connected to the hole wall of the first mounting hole and the hole wall of the second mounting hole.

3. The battery device as claimed in claim 2, characterized in that, Along the length of the first connector, both ends of the first connector are covered with an electrophoretic coating film.

4. The battery device as claimed in claim 2, characterized in that, On the side closer to the second housing, the height difference between the end face of the first connector and the end face of the first housing is less than or equal to 0.1 mm.

5. The battery device as claimed in claim 2, characterized in that, The pressure strip is provided with a first locking hole for the second connector to pass through, and the surface of the pressure strip opposite to the second housing is provided with a conductive connection area surrounding the first locking hole, and the second connector is attached to the conductive connection area; Wherein, the surface of the first housing is provided with a first electrophoretic layer, the first electrophoretic layer exposing the second mounting hole; and / or, The surface of the pressure strip is provided with a second electrophoretic layer, which exposes the conductive connection area and the first mounting hole.

6. The battery device as claimed in claim 5, characterized in that, There are multiple second mounting holes and multiple first mounting holes, and the pressure strip is fitted and connected to the first housing body; Wherein, the pressure strip is fixedly connected to the first housing body through a plurality of the first connecting pieces; or, The housing also includes at least one first fastener, which passes through the pressure strip and the first housing. The pressure strip and the first housing are fixedly connected by the first connector and the first fastener. The first electrophoretic layer covers the hole in the first housing for the first fastener to pass through.

7. The battery device as claimed in claim 6, characterized in that, The number of the first mounting holes is at least three; the spacing between adjacent first mounting holes is not entirely equal along the length of the pressure strip.

8. The battery device according to any one of claims 1-7, characterized in that, The second connector includes a bolt and a rivet nut, the rivet nut being fixed to the second housing and electrically connected to the second housing; One end of the bolt abuts against the pressure strip and is electrically conductive, while the other end of the bolt is threadedly connected to the rivet nut and is electrically conductive.

9. The battery device as claimed in claim 8, characterized in that, The second housing is provided with a second locking hole. The rivet nut includes a nut head and a nut shank with internal threads. The nut shank passes through the second locking hole and has a retaining flange. The nut head and the retaining flange abut against the two sides of the second housing and are electrically connected.

10. The battery device as claimed in claim 9, characterized in that, The housing also includes a sealing element, and both the sealing element and the nut head are clamped between the first housing and the second housing.

11. The battery device according to any one of claims 1-7, characterized in that, The enclosure also includes a plurality of second fasteners, and the first enclosure and the second enclosure are fixedly connected by at least one second connector and a plurality of second fasteners.

12. The battery device according to any one of claims 1-7, characterized in that, The pressure strip is fixedly connected to the first housing body by at least one of the following methods: bonding, welding, and riveting.

13. The battery device according to any one of claims 1-7, characterized in that, The pressure strip is made of stainless steel or aluminum.

14. The battery device according to any one of claims 1-7, characterized in that, The first box body has a first edge seal around its periphery, and the second box body has a second edge seal around its periphery. The second edge seal and the first edge seal are stacked together. The pressure strip is fixed on the first edge seal, the first connector is fixed on the pressure strip and the first edge seal, and the second connector is fixed on both the first edge seal and the second edge seal.

15. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1-14, the battery device being used to store or provide electrical energy.

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