Battery device and electric device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device, and relates to the technical field of batteries. The battery device comprises a box body, a battery monomer assembly, a binding piece and a pressing piece, the box body comprises a first beam body and a second beam body which are oppositely arranged; the battery monomer assembly comprises a plurality of battery monomers and is positioned between the first beam body and the second beam body; the binding piece is connected with the first beam body and the second beam body, and at least part of the binding piece is located on one side of the battery monomer in the second direction; the pressing piece is connected to the battery monomer assembly, at least part of the pressing piece is located on the side, away from the battery monomers, of the binding piece in the second direction, and the pressing piece is configured to press at least part of the binding piece to at least one battery monomer. According to the battery device provided by the embodiment of the invention, the pressing piece is arranged to press at least part of the binding piece to the at least one battery monomer, so that the relative shaking of the binding piece and the battery monomer assembly can be reduced, and the risk of sparking of the binding piece and the battery monomer assembly is further reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. In this case, electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In the development of battery technology, the reliability of battery devices is an issue that cannot be ignored. If the reliability of a battery device is poor, it will be difficult for the battery device to be popularized. Therefore, how to improve the reliability of battery devices is a technical issue in battery technology that needs to be considered for a long time. Utility Model Content

[0004] The present application provides a battery device and an electrical device, which can improve the reliability of the battery device.

[0005] This application is achieved through the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a battery device, including a housing, a battery cell assembly, a restraining member, and a pressing member. The housing includes a first beam and a second beam that are arranged opposite to each other along a first direction; the battery cell assembly includes a plurality of battery cells arranged along the first direction, and the battery cell assembly is located between the first beam and the second beam; the restraining member connects the first beam and the second beam, and at least a portion of the restraining member is located on one side of the battery cell along a second direction, and the second direction is perpendicular to the first direction; the pressing member is connected to the battery cell assembly, and along the second direction, at least a portion of the pressing member is located on a side of the restraining member away from the battery cell, and the pressing member is configured to press at least a portion of the restraining member against at least one battery cell.

[0007] In the above embodiment, by providing a pressing member to press at least part of the restraining member against at least one battery cell, the relative shaking between the restraining member and the battery cell assembly can be reduced, thereby reducing the risk of ignition between the restraining member and the battery cell assembly.

[0008] In some embodiments, the clamping member is provided with a first connection portion and a second connection portion, both of which are connected to the battery cell assembly. Along the third direction, the first connection portion and the second connection portion are respectively located on two opposite sides of the restraining member, and the first direction, the second direction and the third direction are perpendicular to each other.

[0009] In the above embodiments, by providing that the pressing member has a first connecting portion and a second connecting portion, and both the first connecting portion and the second connecting portion are connected to the battery cell assembly, and further that the first connecting portion and the second connecting portion are located on opposite sides of the binding member along the third direction, it is possible to make the middle region of the pressing member contact the binding member so as to press at least a part of the binding member against at least one battery cell. This arrangement gives the pressing member better connection stability, and thus enables the pressing member to better press at least a part of the binding member against at least one battery cell.

[0010] In some embodiments, the battery cell assembly is provided with a first mating portion, one of the first mating portion and the first connecting portion being a first convex portion and the other being a first concave portion, and the first convex portion and the first concave portion being in plug-in mating; and / or, the battery cell assembly is provided with a second mating portion, one of the second mating portion and the second connecting portion being a second convex portion and the other being a second concave portion, and the second convex portion and the second concave portion being in plug-in mating.

[0011] In the above embodiments, the first connecting portion and the battery cell assembly are in plug-in mating, and / or the second connecting portion and the battery cell assembly are in plug-in mating, which can make the assembly of the battery device more convenient during manufacturing, and can also make the battery cells more convenient to disassemble during later maintenance and subsequent recycling.

[0012] In some embodiments, the battery cell assembly further includes a plurality of bus bars, the bus bars electrically connect at least two battery cells, the first connecting portion is connected to one bus bar, and the second connecting portion is connected to another bus bar.

[0013] In the above embodiments, by connecting the first connecting portion and the second connecting portion of the pressing member to two different bus bars respectively, the first connecting portion and the second connecting portion can be located on opposite sides of the binding member in the third direction, so that the pressing member can better press at least a part of the binding member against at least one battery cell. And the pressing member is connected to the bus bar. On the one hand, since the bus bar is located on the relatively outer side, it is convenient for the connection of the pressing member. On the other hand, it can reduce the influence of the connection of the pressing member on the battery cell.

[0014] In some embodiments, both the first connecting portion and the second connecting portion are connected to the battery cell.

[0015] In the above embodiments, by connecting the first connecting portion and the second connecting portion to the battery cell, the pressing member and the battery cell can have better fixing performance, and thus the pressing member can better press at least a part of the binding member against at least one battery cell.

[0016] In some embodiments, the pressing member includes a pressing main body and an adjusting portion. Along the second direction, at least a part of the pressing main body is located on the side of the binding member away from the battery cell. The first connecting portion and the second connecting portion are both provided on the pressing main body, and the adjusting portion is configured to adjust the pressing force of the pressing main body pressing on the binding member.

[0017] In the above embodiments, by providing the adjusting portion to adjust the pressing force of the pressing main body pressing on the binding member, it is possible to correspond to the specifications of different battery devices, the number of battery cells that the binding member needs to abut against, and the number of pressing members provided, and selectively set the pressing force of the pressing main body pressing on the binding member, so that the battery device can have better reliability.

[0018] In some embodiments, the pressing main body includes a first connecting area, a second connecting area, and a third connecting area that are sequentially connected. The first connecting portion is provided on the first connecting area, the second connecting portion is provided on the third connecting area. Along the second direction, at least a part of the second connecting area protrudes from the surface of the first connecting area facing the battery cell and the surface of the third connecting area facing the battery cell; the adjusting portion is connected to the first connecting area, and one of the third connecting area and the adjusting portion is provided with a positioning protrusion, and the other is provided with a plurality of positioning holes. The plurality of positioning holes are arranged at intervals along the third direction, and the plurality of positioning holes are used to selectively plug and cooperate with the positioning protrusion to adjust the pressing force of the second connecting area pressing on the binding member.

[0019] In the above embodiments, by connecting the adjusting portion to the first connecting area, and providing a positioning protrusion on one of the third connecting area and the adjusting portion, and a plurality of positioning holes on the other, it is possible to make the plurality of positioning holes selectively plug and cooperate with the positioning protrusion to adjust the distance between the positioning protrusion and the first connecting area along the third direction, and further adjust the pressing force of the second connecting area pressing on the binding member, so that the pressing main body can better press on the binding member, so as to further improve the reliability of the battery device.

[0020] In some embodiments, the second connecting area is bent from the directions of the first connecting area and the third connecting area close to the battery cell. Through this setting, the second connecting area can be bent so that the second connecting area can abut against the binding member, and further the pressing main body presses on the binding member.

[0021] In some embodiments, the positioning protrusion is provided on the third connecting area, and the third connecting area is provided with a reinforcing rib. In the projection plane perpendicular to the second direction, at least a part of the orthographic projection of the reinforcing rib is located between the orthographic projection of the positioning protrusion and the orthographic projection of the second connecting area along the third direction.

[0022] In the above embodiments, the region where the reinforcing ribs are provided has better stability and is more difficult to deform compared to other regions. By providing the reinforcing ribs, the pressing member can deform in a specified region where no reinforcing ribs are provided, thereby better pressing the binding member.

[0023] In some embodiments, the pressing member further includes a bent portion. The pressing body, the bent portion, and the adjusting portion are connected in sequence. Along the second direction, at least a part of the adjusting portion is located on the side of the pressing body facing away from the battery cell.

[0024] In the above embodiments, the pressing member is bent in the region of the bent portion so that at least a part of the adjusting portion is located on the side of the pressing body facing away from the battery cell in the second direction, thereby enabling the adjusting portion to adjust the pressing force of the pressing body on the binding member. Moreover, the pressing body and the adjusting portion are integrally formed, which can make the pressing member easier to manufacture during production and reduce the manufacturing cost.

[0025] In some embodiments, the battery cell assembly further includes a bus bar, and the bus bar is electrically connected to at least two battery cells. The pressing member is connected to the bus bar. With this arrangement, the pressing member is connected to the bus bar. On the one hand, since the bus bar is located relatively outside, it is convenient for the connection of the pressing member. On the other hand, it can reduce the influence of the connection of the pressing member on the battery cells.

[0026] In some embodiments, along the second direction, the battery cell has a first surface facing the binding member, and the binding member is adhered to the first surface. With this arrangement, the binding member can be better connected to the battery cell, further reducing the relative shaking between the binding member and the battery cell assembly, and thus further reducing the risk of arcing between the binding member and the battery cell assembly.

[0027] In some embodiments, there are multiple pressing members, and the multiple pressing members are arranged at intervals along the first direction. With this arrangement, when the binding member abuts against multiple battery cell assemblies, the multiple pressing members are arranged at intervals along the arrangement direction of the multiple battery cells in the battery cell assembly, which can enable the entire binding member to be better pressed on the battery cells to further reduce the risk of arcing caused by the mutual friction between the binding member and the battery cell assembly. The number of pressing members provided can be selectively set according to the size of the pressing member in the first direction, the number of battery cells against which the binding member abuts, and the size of the battery cells.

[0028] In some embodiments, the pressing member is made of insulating material. With this arrangement, the pressing member can be applied to more battery devices. For example, when the pressing member is connected to a battery cell, an insulating member may not be provided on the outer shell of the battery cell, and the pressing member can still maintain insulation from the battery cell. Another example is that in a battery cell assembly including a bus bar, when the pressing member is connected to the bus bar, an insulating layer does not need to be provided in the connection area between the two, and the pressing member can still maintain insulation from the battery cell. And the fact that the pressing member maintains insulation can reduce the risk of short circuit in the battery device and further improve the reliability of the battery device.

[0029] In a second aspect, an electrical device provided by an embodiment of the present application includes the battery device provided by any one of the embodiments in the first aspect.

[0030] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 Schematic structural diagram of a vehicle provided by some embodiments of the present application;

[0033] Figure 2 Exploded structural diagram of a battery device provided by some embodiments of the present application;

[0034] Figure 3 Exploded structural diagram of a battery cell provided by some embodiments of the present application;

[0035] Figure 4 Schematic structural diagram of a battery device provided by some embodiments of the present application;

[0036] Figure 5 Schematic side view structural diagram of a battery device provided by some embodiments of the present application;

[0037] Figure 6 Schematic top view structural diagram of a battery device provided by some embodiments of the present application;

[0038] Figure 7 Cross-sectional view of a battery device provided by some embodiments of the present application;

[0039] Figure 8Schematic diagram of the unfolded structure of the pressing member provided by some embodiments of the present application;

[0040] Figure 9 Schematic diagram of the connection structure between the pressing member and the battery cell assembly provided by some embodiments of the present application;

[0041] Figure 10 Schematic diagram of the unfolded structure of the pressing member provided by some other embodiments of the present application.

[0042] Icon:

[0043] 1000 - Vehicle; 100 - Battery device; 200 - Controller; 300 - Motor; 10 - Box body; 11 - First box body; 12 - Second box body; 20 - Battery cell; 201 - Electrode terminal; 202 - Outer shell; 2021 - Housing; 2022 - End cover; 203 - Electrode assembly; 101 - First beam body; 102 - Second beam body; 30 - Battery cell assembly; 301 - First mating part; 302 - Second mating part; 303 - Bus bar; 40 - Binding member; 50 - Pressing member; 501 - First connection part; 502 - Second connection part; 503 - Pressing main body; 504 - Adjusting part; 5041 - Positioning hole; 505 - First connection area; 506 - Second connection area; 507 - Third connection area; 5071 - Positioning protrusion; 5072 - Reinforcing rib; 508 - Bending part; X - First direction; Y - Second direction; Z - Third direction. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs; the terms used in the description of the present application in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the description and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of the present application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0046] References to "embodiments" in this application mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0047] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "joined", "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] The term "and / or" in this application is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0049] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed descriptions of the same components are omitted. It should be understood that the thicknesses, lengths, widths, etc. of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device, are only for illustrative purposes and should not constitute any limitation to this application.

[0050] The term "plurality" as used in this application refers to two or more (including two).

[0051] In the embodiments of this application, the battery cell can be a secondary battery, which refers to a battery cell that can activate the active material and continue to be used after being charged after discharging the battery cell.

[0052] The battery cell includes but is not limited to lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium-metal batteries, sodium-metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0053] In some embodiments, the battery cell can include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc.

[0054] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, and a multi-prismatic battery cell. The multi-prismatic battery cell is, for example, a hexagonal prism battery cell, etc.

[0055] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0056] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells. As an example, the battery cell assembly can be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module.

[0057] As an example, the battery module can be formed by bundling a plurality of battery cells with cable ties.

[0058] In some embodiments, the battery device can be a battery pack, and the battery pack can include a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0059] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.

[0060] As an example, the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0061] As an example, the box body can include a first box body and a second box body. The first box body and the second box body are snapped together so that a closed space is formed inside the box body to accommodate the battery cell assembly. The "closed" here means covering or closing, which can be sealed or non-sealed. The first box body can be a top cover or a bottom plate.

[0062] As an example, the box body 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 a closed space is formed inside the box body to accommodate the battery cell assembly.

[0063] As an example, the box body can be a part of the chassis structure of a vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0064] In some embodiments, the battery device refers to an energy storage device, which includes a box body, and at least one side of the box body is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0065] During the use of the battery device, the battery cells are prone to expansion. In order to reduce the impact caused by the expansion of the battery cells, two relatively arranged beam bodies can be used to press the battery cells when the battery cells expand, so as to slow down the expansion of the battery cells. When the beam bodies are arranged to press the battery cells, as the battery device is used for a long time, after the battery cells gradually expand, the beam bodies used to press the battery cells will also be gradually squeezed by the battery cells and deformed, thereby causing the binding force on the battery cells to gradually decrease.

[0066] In order to further slow down the expansion of the battery cells and improve the service life of the battery device, a restraint made of metal material can be provided. The restraint is connected to two relatively arranged beam bodies and restrains the beam bodies. When the battery device expands, it can slow down the deformation of the beam bodies caused by the extrusion of the battery cells, thereby achieving the purpose of further slowing down the expansion of the battery cells and improving the service life of the battery device.

[0067] When the restraint is arranged to restrain the beam bodies, the restraint can be abutted against a plurality of battery cells, so that the restraint can not only slow down the deformation of the beam bodies, but also restrain the battery cells to reduce the relative shaking of the battery cells in the box body. When the restraint is abutted against a plurality of battery cells, in order to reduce the risk of ignition caused by the relative friction between the battery cell assembly and the restraint due to the shaking of the battery device, the restraint can be relatively fixed to the plurality of battery cells, such as by using glue to relatively fix the restraint to the plurality of battery cells.

[0068] However, during the use of the battery device, due to environmental influences, such as the shaking of the battery device, the irregular expansion of a plurality of battery cells, and the influence of heat in the battery device, the bonding area between the restraint and some battery cells may become de-bonded, thereby increasing the risk of ignition between the restraint and the battery cell assembly.

[0069] In view of this, an embodiment of the present application provides a battery device, including a box body, a battery cell assembly, a restraint member, and a pressing member. The box body includes a first beam body and a second beam body disposed opposite to each other in a first direction; the battery cell assembly includes a plurality of battery cells arranged in the first direction, and the battery cell assembly is located between the first beam body and the second beam body; the restraint member connects the first beam body and the second beam body, and at least a part of the restraint member is located on one side of the battery cells in a second direction, and the second direction is perpendicular to the first direction; the pressing member is connected to the battery cell assembly, and in the second direction, at least a part of the pressing member is located on the side of the restraint member away from the battery cells, and the pressing member is configured to press at least a part of the restraint member against at least one battery cell.

[0070] In such a battery device, by arranging the pressing member to press at least a part of the restraint member against at least one battery cell, the relative shaking between the restraint member and the battery cell assembly can be reduced, thereby reducing the risk of arcing between the restraint member and the battery cell assembly.

[0071] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0072] For the convenience of description in the following embodiments, the electrical device is taken as a vehicle as an example for illustration.

[0073] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as an operating power source of the vehicle 1000.

[0074] The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0075] In some embodiments of the present application, the battery device 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, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0076] Please refer to Figure 2 , Figure 2Schematic exploded view of the battery device 100 according to some embodiments of the present application. The battery device 100 may include battery cells 20 and a housing 10, and the housing 10 is used to accommodate the battery cells 20.

[0077] Among them, a closed space for accommodating the battery cells 20 is formed inside the housing 10, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first housing 11 and a second housing 12, and the first housing 11 and the second housing 12 are buckled with each other. The first housing 11 and the second housing 12 can be of various shapes, such as a cuboid, a cylinder, etc. The first housing 11 may be a hollow structure with one side open, and the second housing 12 may also be a hollow structure with one side open. The open side of the second housing 12 and the open side of the first housing 11 are buckled with each other, thus forming the housing 10 with a closed space. It may also be that the first housing 11 is a hollow structure with one side open, and the second housing 12 is a plate-like structure. The second housing 12 is buckled to the open side of the first housing 11, thus forming the housing 10 with an accommodation space.

[0078] In the battery device 100, the battery cells 20 can be one or multiple. If there are multiple battery cells 20, the multiple battery cells 20 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection means that there are both series and parallel connections among the multiple battery cells 20. It can be that multiple battery cells 20 are first connected in series, in parallel, or in a hybrid connection to form a battery module, and then multiple battery modules are connected in series, in parallel, or in a hybrid connection to form a whole and are accommodated in the housing 10. It can also be that all the battery cells 20 are directly connected in series, in parallel, or in a hybrid connection together, and then the whole formed by all the battery cells 20 is accommodated in the housing 10.

[0079] In some embodiments, the battery device 100 may further include a bus bar 303. The multiple battery cells 20 can be electrically connected through the bus bar 303 to achieve series, parallel, or hybrid connection of the multiple battery cells 20. The bus bar 303 can be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0080] In some embodiments, please refer to Figure 3 , Figure 3 Schematic exploded view of the battery cell 20 according to some embodiments of the present application. The battery cell 20 may include a housing 202 and an electrode assembly 203, and the electrode assembly 203 is accommodated in the housing 202.

[0081] In some embodiments, the housing 202 may include a housing body 2021 and an end cap 2022. The housing body 2021 has an opening, and the end cap 2022 closes the opening of the housing body 2021. Here, "closing" means covering or closing, which can be a seal or a non-seal.

[0082] The housing 2021 is a component for accommodating the electrode assembly 203. The housing 2021 can be a hollow structure with an opening formed at one end, or a hollow structure with openings formed at opposite ends. The housing 2021 can have various shapes, such as cylindrical, cuboid, etc. The material of the housing 2021 can be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The electrode assembly 203 can be partially located inside the housing 2021 or entirely located inside the housing 2021.

[0083] The end cap 2022 and the housing 2021 jointly define a receiving space for accommodating the electrode assembly 203 and other components. The end cap 2022 can be connected to the housing 2021 by means such as welding or crimping to close the opening of the housing 2021. The shape of the end cap 2022 can be adapted to the shape of the housing 2021. For example, when the housing 2021 is a cuboid structure, the end cap 2022 is a rectangular plate-like structure adapted to the housing 2021. Another example is that when the housing 2021 is a cylindrical structure, the end cap 2022 is a circular plate-like structure adapted to the housing 2021. The material of the end cap 2022 can also be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 2022 and the housing 2021 can be the same or different.

[0084] In an embodiment where the housing 2021 has an opening formed at one end, one end cap 2022 can be correspondingly provided. In an embodiment where the housing 2021 has openings formed at opposite ends, two end caps 2022 can be correspondingly provided. The two end caps 2022 respectively close the two openings of the housing 2021, and the two end caps 2022 and the housing 2021 jointly define the receiving space.

[0085] In some embodiments, the battery cell 20 may further include electrode terminals 201. The electrode terminals 201 are disposed on the outer casing 202 and are used for electrically connecting with the tabs of the electrode assembly 203 to input or output the electric energy of the battery cell 20. The electrode terminals 201 can be disposed on the housing 2021 of the outer casing 202 or on the end cap 2022 of the outer casing 202. The electrode terminals 201 of different polarities of a battery cell 20 can be disposed on the same side of the outer casing 202 or on different sides of the outer casing 202. The electrode terminals 201 and the tabs can be directly connected. For example, the electrode terminals 201 and the tabs are welded. The electrode terminals 201 and the tabs can also be indirectly connected. For example, the electrode terminals 201 and the tabs are indirectly connected through a current collector member. The current collector member can be a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0086] As an example, in Figure 3In the illustrated embodiment, an opening is formed at one end of the shell 2021, and there is one end cap 2022 in the shell 202, and one end cap 2022 closes one opening of the shell 2021. Two electrode terminals 201 are provided on the end cap 2022, and the two electrode terminals 201 are respectively a positive electrode terminal 201 and a negative electrode terminal 201. A positive electrode tab and a negative electrode tab are formed at one end of the electrode assembly 203 facing the end cap 2022, and the positive electrode terminal 201 is electrically connected to the positive electrode tab, and the negative electrode terminal 201 is electrically connected to the negative electrode tab.

[0087] See also Figures 4 - 6 , Figure 4 A schematic diagram of the structure of a battery device provided in some embodiments of the present application; Figure 5 A schematic diagram of a side view of a battery device provided in some embodiments of the present application; Figure 6 A schematic diagram of a top view of a battery device provided in some embodiments of the present application. The present application provides a battery device 100, including a housing 10, a battery cell assembly 30, a restraining member 40, and a pressing member 50. The housing 10 includes a first beam 101 and a second beam 102 arranged opposite to each other along a first direction X; the battery cell assembly 30 includes a plurality of battery cells 20 arranged along the first direction X, and the battery cell assembly 30 is located between the first beam 101 and the second beam 102; the restraining member 40 connects the first beam 101 and the second beam 102, and at least a portion of the restraining member 40 is located on one side of the battery cell 20 along a second direction Y, and the second direction Y is perpendicular to the first direction X; the pressing member 50 is connected to the battery cell assembly 30, and along the second direction Y, at least a portion of the restraining member 50 is located on the side of the restraining member 40 away from the battery cell 20, and the pressing member 50 is configured to press at least a portion of the restraining member 40 against at least one battery cell 20.

[0088] The box body 10 may include side beams and expansion beams, and the side walls of the outer peripheral surface of the box body may be considered as side beams. The expansion beam is a beam-like structure spanning between the side walls of the box body 10. The space inside the box body 10 may be divided into two parts by the expansion beam. One part may be a storage space defined by the expansion beam together with the side walls and bottom wall of the box body 10, and the storage space may be arranged with a plurality of battery cells 20 arranged in an array. The other part may be an installation space for arranging a battery management system (referred to as "BMS"), a high-voltage box, etc. The expansion beam may be made of wall material or of extruded profile. The expansion beam is constructed to bend and deform as the battery cells 20 in the storage space expand.

[0089] The first beam body 101 may be a side beam or an expansion beam, and correspondingly, the second beam body 102 may be a side beam or an expansion beam.

[0090] The battery cell assembly 30 is located between the first beam 101 and the second beam 102. It is possible that the battery cells 20 in the battery cell assembly 30 do not contact the first beam 101 and / or the second beam 102. In this setting scenario, when the battery cells 20 expand, they contact the first beam 101 and / or the second beam 102 and are gradually squeezed by the first beam 101 and the second beam 102 to limit further expansion of the battery cells 20. It is also possible that the battery cells 20 contact the first beam 101 and the second beam 102. In this setting scenario, when the battery cells 20 do not expand, the battery cells 20 only abut against the first beam 101 and the second beam 102 without being squeezed by the first beam 101 and the second beam 102. It is also possible that when the battery cells 20 do not expand, the battery cells 20 are still squeezed by the first beam 101 and the second beam 102.

[0091] When the battery cells 20 contact the first beam 101 and / or the second beam 102, the battery cells 20 may directly abut against the first beam 101 and / or the second beam 102, or the battery cells 20 may indirectly abut against the first beam 101 and / or the second beam 102. For example, a buffer foam is provided between the battery cells 20 and the first beam 101 and / or the second beam 102.

[0092] Any side of the battery cells 20 can face the first beam 101 or the second beam 102. For example, when the battery cells 20 have two pairs of sides with different areas, the large side of the battery cells 20 can face the first beam 101 or the second beam 102, or the small side of the battery cells 20 can face the first beam 101 or the second beam 102.

[0093] The restraint member 40 connects the first beam 101 and the second beam 102. The part of the restraint member 40 between the first area connecting the first beam 101 and the second area connecting the second beam 102 can be in a tensioned state, or the part of the restraint member 40 between the first area connecting the first beam 101 and the second area connecting the second beam 102 can be in a relaxed state and change from the relaxed state to the tensioned state when the first beam 101 and the second beam 102 are squeezed by the battery cells 20.

[0094] Taking the connection of the first beam body 101 by the binding member 40 as an example, the end of the binding member 40 can be connected to the first beam body 101, or the area of the binding member 40 near the end can be connected to the first beam body 101. The binding member 40 can be connected to the opposite surface of the first beam body 101 facing the second beam body 102, or the binding member 40 can be connected to other surfaces of the first beam body 101 adjacent to the opposite surface, or the binding member 40 can be connected to the opposite surface of the first beam body 101 facing away from the opposite surface. The connection relationship between the binding member 40 and the second beam body 102 can also be set corresponding to the connection relationship between the binding member 40 and the first beam body 101.

[0095] The pressing member 50 is connected to the battery cell assembly 30, and the connection area where the pressing member 50 is connected to the battery cell assembly 30 can be one or multiple.

[0096] The battery cell assembly 30 can include battery cells 20 and bus bars 303. When the pressing member 50 is connected to the battery cell assembly 30, the pressing member 50 can be connected to the battery cells 20, or the pressing member 50 can be connected to the bus bars 303.

[0097] Part of the pressing member 50 can be located on the side of the binding member 40 facing away from the battery cell 20, or the entire pressing member 50 can be located on the side of the binding member 40 facing away from the battery cell 20. For example, when a through hole is provided on the binding member 40 and the pressing member 50 is connected to the battery cell assembly 30 through the area of the through hole, the entire pressing member 50 can be arranged on the side of the binding member 40 facing away from the battery cell 20. The pressing member 50 can press at least part of the binding member 40 against one battery cell 20, or the pressing member 50 can press at least part of the binding member 40 against multiple battery cells 20.

[0098] The pressing member 50 can be one, and one pressing member 50 presses at least part of the binding member 40 against at least one battery cell 20; the pressing member 50 can also be multiple. Among the multiple pressing members 50, the pressing member 50 presses at least part of the binding member 40 against at least one battery cell 20.

[0099] When the pressing member 50 presses at least part of the binding member 40 against at least one battery cell 20, there can be a connection relationship between the binding member 40 and the battery cell 20. For example, the two can still be connected by adhesion. There can also be no connection relationship between the binding member 40 and the battery cell 20, and they only abut against each other.

[0100] The pressing member 50 can be made of an insulating material or a non-insulating material.

[0101] In the above embodiments, by providing a pressing member 50 to press at least a part of the binding member 40 against at least one battery cell 20, the relative shaking between the binding member 40 and the battery cell assembly 30 can be reduced, thereby reducing the risk of arcing between the binding member 40 and the battery cell assembly 30.

[0102] In some embodiments, please refer to Figure 7 , Figure 7 which is a cross-sectional view of a battery device provided in some embodiments of the present application. The pressing member 50 is provided with a first connecting portion 501 and a second connecting portion 502. Both the first connecting portion 501 and the second connecting portion 502 are connected to the battery cell assembly 30. Along the third direction Z, the first connecting portion 501 and the second connecting portion 502 are respectively located on opposite sides of the binding member 40. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs.

[0103] The battery cell assembly 30 may include a battery cell 20 and a bus bar 303. The first connecting portion 501 may be connected to the battery cell 20 and / or the bus bar 303. Correspondingly, the first connecting portion 501 may also be connected to the battery cell 20 and / or the bus bar 303.

[0104] The direction in which the first connecting portion 501 points to the second connecting portion 502 may be parallel to the third direction Z or may intersect the third direction Z.

[0105] Taking the connection between the first connecting portion 501 and the battery cell assembly 30 as an example, the first connecting portion 501 and the battery cell assembly 30 can be connected by bonding, bolt connection, and limiting cooperation methods, such as plug-in cooperation, to achieve the connection between the first connecting portion 501 and the battery cell assembly 30. Correspondingly, the second connecting portion 502 can also adopt any of the above connection methods or limiting cooperation methods to achieve the connection with the battery cell assembly 30.

[0106] In the above embodiments, by providing that the pressing member 50 has a first connecting portion 501 and a second connecting portion 502, and making both the first connecting portion 501 and the second connecting portion 502 connected to the battery cell assembly 30, and further making the first connecting portion 501 and the second connecting portion 502 located on opposite sides of the binding member 40 along the third direction Z, it is possible to make the middle region of the pressing member 50 contact the binding member 40, so as to press at least a part of the binding member 40 against at least one battery cell 20. This setting makes the pressing member 50 have better connection stability, and further enables the pressing member 50 to better press at least a part of the binding member 40 against at least one battery cell 20.

[0107] In some embodiments, still refer to Figure 7, the battery cell assembly 30 is provided with a first mating portion 301. One of the first mating portion 301 and the first connecting portion 501 is a first convex portion, and the other is a first concave portion. The first convex portion and the first concave portion are in plug-in fit; and / or, the battery cell assembly 30 is provided with a second mating portion 302. One of the second mating portion 302 and the second connecting portion 502 is a second convex portion, and the other is a second concave portion. The second convex portion and the second concave portion are in plug-in fit.

[0108] When the battery cell assembly 30 and the first connecting portion 501 are in plug-in fit through the first convex portion and the first concave portion, the second connecting portion 502 can be connected to the first connecting portion 501 by other connection methods, such as adhesive connection, bolt connection, etc., or can also adopt the plug-in fit method.

[0109] In the above embodiment, the first connecting portion 501 and the battery cell assembly 30 adopt plug-in fit, and / or the second connecting portion 502 and the battery cell assembly 30 adopt plug-in fit, which can make the assembly of the battery device 100 more convenient during manufacturing, and can also make the battery cell 20 more convenient to disassemble during later maintenance and subsequent recycling.

[0110] In some embodiments, please refer back to Figure 5 and Figure 6 , the battery cell assembly 30 further includes a plurality of bus bars 303. The bus bars 303 are electrically connected to at least two battery cells 20. The first connecting portion 501 is connected to one bus bar 303, and the second connecting portion 502 is connected to another bus bar 303.

[0111] The two battery cells 20 electrically connected to the bus bar 303 can be arranged adjacent to each other or non-adjacent to each other. For example, a plurality of battery cells 20 are arranged along the first direction X. The plurality of battery cells 20 include an adjacent first battery cell, a second battery cell, and a third battery cell. The second battery cell is arranged between the first battery cell and the third battery cell. It can be that the bus bar 303 connects the electrode terminal 201 of the first battery cell and the electrode terminal 201 of the second battery cell to realize the electrical connection of the bus bar 303 to two adjacent battery cells; it can be that the bus bar 303 connects the electrode terminal 201 of the first battery cell and the electrode terminal 201 of the third battery cell to realize the electrical connection of the bus bar 303 to two non-adjacent battery cells 20. The polarities of the electrode terminals 201 of the two battery cells 20 connected to the same bus bar 303 can be the same or opposite. If the polarities of the electrode terminals 201 of the two batteries connected to the same bus bar 303 are the same, the bus bar 303 can realize the parallel connection of the two battery cells 20; if the polarities of the electrode terminals 201 of the two batteries connected to the same bus bar 303 are different, the bus bar 303 can realize the series connection of the two battery cells 20.

[0112] In the above embodiments, by connecting the first connecting portion 501 and the second connecting portion 502 of the pressing member 50 to two different bus bars 303 respectively, the first connecting portion 501 and the second connecting portion 502 can be located on opposite sides of the binding member 40 in the third direction Z, so that the pressing member 50 can better press at least part of the binding member 40 against at least one battery cell 20. And the pressing member 50 is connected to the bus bar 303. On the one hand, since the bus bar 303 is located on the relatively outer side, it is convenient to connect the pressing member 50. On the other hand, the connection of the pressing member 50 to the bus bar 303 can reduce the influence on the battery cell 20.

[0113] In some embodiments, both the first connecting portion 501 and the second connecting portion 502 are connected to the battery cell 20.

[0114] When the first connecting portion 501 and the second connecting portion 502 are connected to the battery cell 20, the first connecting portion 501 and the second connecting portion 502 can be made of insulating materials to maintain the insulation between the pressing member 50 and the battery cell 20. Or the surface of the battery cell 20 can be provided with an insulating layer, and the first connecting portion 501 and the second connecting portion 502 are connected to the insulating layer to maintain the insulation between the pressing member 50 and the battery cell 20.

[0115] In the above embodiments, by connecting the first connecting portion 501 and the second connecting portion 502 to the battery cell 20, the pressing member 50 and the battery cell 20 can have better fixing performance, so that the pressing member 50 can better press at least part of the binding member 40 against at least one battery cell 20.

[0116] In some embodiments, please refer to Figure 8 and Figure 9 , Figure 8 is an exploded structural schematic diagram of the pressing member provided by some embodiments of the present application; Figure 9 is a connection structural schematic diagram of the pressing member and the battery cell assembly provided by some embodiments of the present application. The pressing member 50 includes a pressing main body 503 and an adjusting portion 504. Along the second direction Y, at least part of the pressing main body 503 is located on the side of the binding member 40 away from the battery cell 20. Both the first connecting portion 501 and the second connecting portion 502 are provided on the pressing main body 503. The adjusting portion 504 is configured to adjust the pressing force of the pressing main body 503 against the binding member 40.

[0117] Both the first connecting portion 501 and the second connecting portion 502 are provided on the pressing main body 503. By the first connecting portion 501 and the second connecting portion 502 being located on opposite sides of the binding member 40 in the third direction Z, the area between the first connecting portion 501 and the second connecting portion 502 contacts the binding member 40, so as to press at least part of the binding member 40 against at least one battery cell 20.

[0118] At least a part of the adjusting portion 504 may be located on the side of the pressing member 50 away from the battery cell 20. By pressing the pressing member 50, the pressing force of the pressing main body 503 pressing against the binding member 40 can be adjusted. At least a part of the adjusting portion 504 may also be located on the side of the pressing member 50 facing the battery cell 20. By adjusting the distance between the pressing member 50 and the battery cell 20, the pressing force of the pressing main body 503 pressing against the binding member 40 can be adjusted.

[0119] The adjusting portion 504 may be connected to the pressing main body 503, or may be two independent components from the pressing main body 503. Only through local cooperation can the pressing force of the pressing main body 503 pressing against the binding member 40 be adjusted.

[0120] In the above embodiment, by providing the adjusting portion 504 to adjust the pressing force of the pressing main body 503 pressing against the binding member 40, it is possible to correspond to the specifications of different battery devices 100, the number of battery cells 20 that the binding member 40 needs to abut against, and the number of pressing members 50 provided, and selectively set the pressing force of the pressing main body 503 pressing against the binding member 40, so that the battery device 100 can have better reliability.

[0121] In some embodiments, still referring to Figure 8 and Figure 9 , the pressing main body 503 includes a first connection area 505, a second connection area 506, and a third connection area 507 that are sequentially connected. The first connection portion 501 is provided in the first connection area 505, and the second connection portion 502 is provided in the third connection area 507. Along the second direction Y, at least a part of the second connection area 506 protrudes from the surface of the first connection area 505 facing the battery cell 20 and the surface of the third connection area 507 facing the battery cell 20; the adjusting portion 504 is connected to the first connection area 505. One of the third connection area 507 and the adjusting portion 504 is provided with a positioning protrusion 5071, and the other is provided with a plurality of positioning holes 5041. The plurality of positioning holes 5041 are spaced along the third direction Z. The plurality of positioning holes 5041 are used to selectively plug and cooperate with the positioning protrusion 5071 to adjust the pressing force of the second connection area 506 pressing against the binding member 40.

[0122] A plurality of positioning holes 5041 are alternatively inserted and matched with the positioning protrusions 5071 to adjust the pressing force of the second connection area 506 pressing against the binding member 40. There are a plurality of positioning holes 5041, and the plurality of positioning holes 5041 are arranged at intervals along the third direction Z. The positioning protrusions 5071 are inserted and matched with the positioning holes 5041 to adjust the distance from the positioning protrusions 5071 to the first connection area 505 in the third direction Z. When the extending distance from the positioning protrusions 5071 to the first connection area 505 remains constant, in the third direction Z, the closer the distance between the positioning protrusions 5071 and the first connection area 505, the higher the tendency of the protruding degree of the second connection area 506 between the positioning protrusions 5071 and the first connection area 505. When the second connection area 506 protrudes and abuts against the binding member 40, since the binding member 40 hinders the deformation of the second connection area 506, the pressing force of the second connection area 506 pressing against the binding member 40 can be made greater. By adjusting the alternative insertion and matching of the plurality of positioning holes 5041 with the positioning protrusions 5071, the distance between the positioning protrusions 5071 and the first connection area 505 in the third direction Z can be adjusted.

[0123] The adjusting portion 504 is connected to the first connection area 505, which can make the adjusting portion 504 relatively fixed with respect to the pressing main body 503. Then, through the adjusting portion 504, the distance between the positioning protrusions 5071 and the first connection area 505 can be made relatively fixed, so that the protruding portion of the second connection area 506 can be maintained.

[0124] In the above embodiment, by connecting the adjusting portion 504 to the first connection area 505, and providing positioning protrusions 5071 on one of the third connection area 507 and the adjusting portion 504, and a plurality of positioning holes 5041 on the other, the plurality of positioning holes 5041 can be alternatively inserted and matched with the positioning protrusions 5071 to adjust the distance between the positioning protrusions 5071 and the first connection area 505 along the third direction Z. Then, the pressing force of the second connection area 506 pressing against the binding member 40 can be adjusted, so that the pressing main body 503 can better press against the binding member 40, and the reliability of the battery device 100 can be further improved.

[0125] In some embodiments, still referring to Figure 8 and Figure 9 , the second connection area 506 is bent from the direction of the first connection area 505 and the third connection area 507 close to the battery cell 20. Through this setting, the second connection area 506 can be bent so that the second connection area 506 can abut against the binding member 40, and then the pressing main body 503 presses against the binding member 40.

[0126] In some embodiments, still referring to Figure 9 , and please further refer to Figure 10 , Figure 10Schematic diagram of the unfolded structure of the clamping member provided in some other embodiments of the present application. The positioning protrusion 5071 is provided in the third connection area 507, and the third connection area 507 is provided with a reinforcing rib 5072. In the projection plane perpendicular to the second direction Y, the orthographic projection of the reinforcing rib 5072 is at least partially located along the third direction Z between the orthographic projection of the positioning protrusion 5071 and the orthographic projection of the second connection area 506.

[0127] In the above embodiment, the area where the reinforcing ribs 5072 are provided has better stability and is less likely to deform than other areas. By providing the reinforcing ribs 5072, the clamping member 50 can be deformed in the designated area where the reinforcing ribs 5072 are not provided, thereby better clamping the restraining member 40.

[0128] In some embodiments, still refer to Figure 8 and Figure 9 The pressing member 50 also includes a bending portion 508 , the pressing body 503 , the bending portion 508 and the adjusting portion 504 are connected in sequence, and along the second direction Y, the adjusting portion 504 is at least partially located on a side of the pressing body 503 away from the battery cell 20 .

[0129] In the above embodiment, the pressing member 50 is bent in the region of the bent portion 508, so that the adjusting portion 504 is at least partially located on the side of the pressing body 503 away from the battery cell 20 in the second direction Y, so that the adjusting portion 504 can adjust the pressing force of the pressing body 503 on the restraining member 40. In addition, the pressing body 503 and the adjusting portion 504 are integrally formed, which can make the pressing member 50 easier to manufacture during production and reduce the manufacturing cost.

[0130] In some embodiments, still refer to Figure 8 and Figure 9 The battery cell assembly 30 further includes a busbar 303, the busbar 303 electrically connects at least two battery cells 20, and the pressing member 50 is connected to the busbar 303. With this arrangement, the pressing member 50 is connected to the busbar 303. On the one hand, because the busbar 303 is located at a relatively outer side, the connection of the pressing member 50 is convenient, and on the other hand, the influence of the connection of the pressing member 50 on the battery cell 20 can be reduced.

[0131] In some embodiments, along the second direction Y, the battery cell 20 has a first surface facing the restraint 40, and the restraint 40 is bonded to the first surface. This arrangement enables the restraint 40 to be better connected to the battery cell 20, further reducing the relative shaking of the restraint 40 and the battery cell assembly 30, thereby further reducing the risk of ignition between the restraint 40 and the battery cell assembly 30.

[0132] In some embodiments, there are multiple pressing members 50, and the multiple pressing members 50 are arranged at intervals along the first direction X. With this arrangement, when the binding member 40 abuts against the multiple battery cell assemblies 30, the multiple pressing members 50 are arranged at intervals along the arrangement direction of the multiple battery cells 20 in the battery cell assembly 30, which can enable the whole binding member 40 to be better pressed on the battery cells 20, so as to further reduce the risk of sparking caused by the mutual friction between the binding member 40 and the battery cell assembly 30. The number of the pressing members 50 can be selectively set according to the size of the pressing members 50 in the first direction X, the number of the battery cells 20 against which the binding member 40 abuts, and the size of the battery cells 20.

[0133] In some embodiments, the pressing member 50 is made of an insulating material. With this arrangement, the pressing member 50 can be applied to more battery devices 100. For example, when the pressing member 50 is connected to the battery cell 20, an insulating member does not need to be provided on the outer shell 202 of the battery cell 20, and the pressing member 50 can still maintain insulation from the battery cell 20. Another example is that in the solution where the battery cell assembly 30 includes a bus bar 303, when the pressing member 50 is connected to the bus bar 303, an insulating layer does not need to be provided in the connection area between the two, and the pressing member 50 can still maintain insulation from the battery cell 20. And the fact that the pressing member 50 maintains insulation can reduce the risk of short circuit in the battery device 100 and further improve the reliability of the battery device 100.

[0134] In some embodiments of the present application, a battery device 100 is provided, comprising a housing 10, a battery cell assembly 30, a restraining member 40, and a pressing member 50. The housing 10 comprises a first beam 101 and a second beam 102 arranged opposite to each other along a first direction X, the battery cell assembly 30 comprises a plurality of battery cells 20 and a plurality of busbars 303, the plurality of battery cells 20 are arranged along the first direction X, one busbar 303 connects at least two battery cells 20, the battery cell assembly 30 is located between the first beam 101 and the second beam 102, the restraining member 40 connects the first beam 101 and the second beam 102, at least a portion of the restraining member 40 is located on one side of the battery cell 20 along a second direction Y, the pressing member 50 is connected to the two busbars 303, at least a portion of the pressing member 50 is located on a side of the restraining member 40 away from the battery cell 20 along the second direction Y, and the pressing member 50 is configured to press the restraining member 40 against at least one battery cell 20. The pressing member 50 includes a first connection portion 501 and a second connection portion 502. The first connection portion 501 is connected to one busbar 303, and the second connection portion 502 is connected to another busbar 303. Along the third direction Z, the first connection portion 501 and the second connection portion 502 are respectively located on opposite sides of the restraining member 40, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other. One busbar 303 is provided with a first concave portion, and the other busbar 303 is provided with a second concave portion. The first connection portion 501 is a first convex portion, and the second connection portion 502 is a second convex portion. The first concave portion and the first convex portion are plugged together, and the second concave portion and the second convex portion are plugged together. The clamping member 50 includes a clamping body 503 and an adjusting portion 504. The clamping body 503 includes a first connection area 505, a second connection area 506 and a third connection area 507 which are connected in sequence. The first connection portion 501 is arranged in the first connection area 505, and the second connection area 506 is arranged in the third connection area 507. Along the second direction Y, the second connection area 506 at least partially protrudes from the surface of the first connection area 505 facing the battery cell 20 and the surface of the third connection area 507 facing the battery cell 20. The adjusting portion 504 is connected to the first connection area 505, and the third connection area 507 is provided with a positioning protrusion 5071. The adjusting portion 504 is provided with a plurality of positioning holes 5041 arranged at intervals along the third direction Z. The plurality of positioning holes 5041 are selectively plugged into and matched with the positioning protrusion 5071 to adjust the clamping force of the second connection area 506 on the restraining member 40. The second connection area 506 is bent. The pressing member 50 further includes a bending portion 508. The pressing body 503, the bending portion 508 and the adjusting portion 504 are connected in sequence. Along the second direction Y, the adjusting portion 504 is at least partially located on the side of the pressing body 503 away from the battery cell 20. There are multiple pressing members 50, and the multiple pressing members 50 are arranged at intervals along the first direction X. The pressing members 50 are made of insulating material. Along the second direction Y, the battery cell 20 has a first surface facing the restraining member 40, and the restraining member 40 is bonded to the first surface.

[0135] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0136] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and variations can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A battery device, characterized in that, include: The box body comprises a first beam body and a second beam body which are arranged opposite to each other along a first direction; A battery cell assembly, comprising a plurality of battery cells arranged along the first direction, wherein the battery cell assembly is located between the first beam body and the second beam body; a binding member connecting the first beam body and the second beam body, wherein at least a portion of the binding member is located on one side of the battery cell along a second direction, and the second direction is perpendicular to the first direction; A pressing member is connected to the battery cell assembly, and along the second direction, at least a portion of the pressing member is located on a side of the restraining member away from the battery cell, and the pressing member is configured to press at least a portion of the restraining member against at least one of the battery cells.

2. The battery device according to claim 1, wherein, The clamping member is provided with a first connecting portion and a second connecting portion, and the first connecting portion and the second connecting portion are both connected to the battery cell assembly. Along the third direction, the first connecting portion and the second connecting portion are respectively located on two opposite sides of the restraining member, and the first direction, the second direction and the third direction are perpendicular to each other.

3. The battery device according to claim 2, characterized in that, The battery cell assembly is provided with a first matching portion, one of the first matching portion and the first connecting portion is a first convex portion, and the other is a first concave portion, and the first convex portion is plug-matched with the first concave portion; and / or, The battery cell assembly is provided with a second matching portion, one of the second matching portion and the second connecting portion is a second convex portion, and the other is a second concave portion, and the second convex portion is plug-fitted with the second concave portion.

4. The battery device according to claim 2, characterized in that, The battery cell assembly further includes a plurality of busbars, wherein the busbars electrically connect at least two of the battery cells, the first connection portion is connected to one of the busbars, and the second connection portion is connected to another of the busbars.

5. The battery device according to claim 2, wherein, The first connection portion and the second connection portion are both connected to the battery cell.

6. The battery device according to claim 2, characterized in that, The clamping member includes a clamping body and an adjusting portion. Along the second direction, at least a portion of the clamping body is located on a side of the restraining member that is away from the battery cell. The first connecting portion and the second connecting portion are both arranged on the clamping body. The adjusting portion is configured to adjust the clamping force of the clamping body on the restraining member.

7. The battery device according to claim 6, characterized in that, The pressing body comprises a first connection area, a second connection area and a third connection area which are connected in sequence, the first connection portion is arranged in the first connection area, the second connection portion is arranged in the third connection area, and along the second direction, the second connection area at least partially protrudes from a surface of the first connection area facing the battery monomer and a surface of the third connection area facing the battery monomer; The adjustment portion is connected to the first connection area, one of the third connection area and the adjustment portion is provided with a positioning protrusion, and the other is provided with a plurality of positioning holes, the plurality of positioning holes are arranged at intervals along the third direction, and the plurality of positioning holes are used to selectively engage with the positioning protrusion to adjust the clamping force of the second connection area pressed against the binding member.

8. The battery device according to claim 7, characterized in that, The second connection area is bent from the first connection area and the third connection area toward the battery cell.

9. The battery device according to claim 7, wherein, The positioning protrusion is disposed on the third connection area, and the third connection area is provided with a reinforcing rib. In a projection plane perpendicular to the second direction, at least a part of the orthographic projection of the reinforcing rib is located between the orthographic projection of the positioning protrusion and the orthographic projection of the second connection area along the third direction.

10. The battery device according to claim 6, characterized in that, The pressing member further includes a bent portion, the pressing main body, the bent portion and the adjusting portion are connected in sequence, and along the second direction, at least a part of the adjusting portion is located on a side of the pressing main body away from the battery cell.

11. The battery device according to claim 1, characterized in that, The battery cell assembly further includes a bus bar, the bus bar is electrically connected to at least two of the battery cells, and the pressing member is connected to the bus bar.

12. The battery device according to any one of claims 1 to 10, characterized in that, Along the second direction, the battery cell has a first surface facing the binding member, and the binding member is adhered to the first surface.

13. The battery device according to any one of claims 1-10, characterized in that, There are a plurality of the pressing members, and the plurality of pressing members are arranged at intervals along the first direction.

14. The battery device according to any one of claims 1-10, characterized in that, The pressing member is made of an insulating material.

15. An electrical device, characterized in that, Including the battery device according to any one of claims 1-14.

Images