Battery device and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery device and electric equipment. The utility model provides a battery device which comprises a box body, a battery monomer and a first press-fitting part, a containing cavity is formed in the box body, an opening is formed in one end of the containing cavity in the first direction, the battery monomer is arranged in the containing cavity, and the first press-fitting part is arranged on at least one side of the containing cavity in the second direction. The two ends, in the third direction, of the first press-fitting part are connected with the box body correspondingly, and the first press-fitting part is configured to limit the single batteries in the second direction; wherein the second direction intersects with the third direction, and the plane where the second direction and the third direction are located is perpendicular to the first direction. According to the battery device, the situation that the single batteries expand in the second direction and extrude the box body to deform can be reduced, so that the phenomenon that the box body cracks and is damaged is reduced, and the structural stability and reliability of the battery device are improved.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. New energy vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the industry's sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] During the charge and discharge process, battery cells expand. In a module-less battery pack, the expansion force of the battery cells is borne entirely by the battery case, which can lead to the risk of cracking and damage in the battery case, thus reducing the reliability of the battery device. Utility Model Content

[0004] In view of the defects of the prior art, the purpose of the present application is to provide a battery device and electrical equipment, which can effectively solve the problem of cracking and damage of the battery box due to the expansion of the battery cell.

[0005] In a first aspect, the present application provides a battery device, comprising:

[0006] A box body, wherein a receiving cavity is formed inside the box body, and an opening is provided at one end of the receiving cavity along the first direction;

[0007] A battery cell, wherein the battery cell is arranged in the accommodating cavity;

[0008] a first pressing member, the first pressing member being provided on at least one side of the accommodating cavity along the second direction, the two ends of the first pressing member along the third direction being respectively connected to the box body, and being configured to restrict the position of the battery cell along the second direction;

[0009] The second direction intersects the third direction, and a plane on which the second direction and the third direction are located is perpendicular to the first direction.

[0010] According to the battery device of the present application, a battery cell can be placed into the accommodating cavity through the opening along a first direction. By positioning a first pressing member on at least one side of the accommodating cavity along a second direction, and connecting the first pressing member at both ends along a third direction to the case body and configured to restrict the position of the battery cell along the second direction, the first pressing member can reduce the battery cell's expansion along the second direction and the resulting compression and deformation of the case body, thereby reducing cracking and damage to the case body and improving the structural stability and reliability of the battery device. Furthermore, when the battery device is impacted along the second direction, the first pressing member can reduce the impact force exerted on the battery cell along the second direction, thereby reducing deformation or damage to the battery cell.

[0011] In some embodiments of the present application, the box body includes two support beams arranged on opposite sides of the accommodating cavity along the third direction, the support beams extend along the second direction, and the first press-fitted part is connected to the two support beams at both ends along the third direction.

[0012] Support beams are provided on opposite sides of the accommodating cavity along the third direction, and are used to limit the position of the battery cells in the accommodating cavity along the third direction and reduce deformation of the battery cells along the third direction. The first press-fitting component is connected to the two support beams at both ends along the third direction, thereby securing the first press-fitting component to one side of the battery cell along the second direction and reducing expansion and deformation of the battery cell along the second direction.

[0013] In some embodiments of the present application, the support beam includes a first support portion and a second support portion arranged in sequence along a first direction, the first support portion is arranged on a side of the second support portion close to the opening, a cavity is formed inside the second support portion, and the end of the first support portion along the second direction is connected to the first press-fit part.

[0014] The first support portion is arranged on a side of the second support portion close to the opening, which facilitates the connection between the first press-fit part and the first support portion. At the same time, the interior of the second support portion is arranged as a cavity, which can reduce the weight of the support beam and reduce the cost of the support beam.

[0015] In some embodiments of the present application, a support structure is provided in the end of the first support portion along the second direction toward the first press-fit part, and the battery device also includes a connecting part, which is sequentially passed through the first press-fit part and the support structure along the second direction and connected to the support structure.

[0016] By arranging a support structure at the end of the first support portion, the connecting member can be connected to the support structure after passing through the first pressing member, thereby fixing the first pressing member on one side of the battery cell along the second direction and reducing the expansion deformation of the battery cell along the second direction.

[0017] In some embodiments of the present application, the box body further includes two side beams arranged on opposite sides of the accommodating cavity along the second direction, the side beams extend along the third direction, and the two support beams and the two side beams together form the accommodating cavity.

[0018] By enclosing two support beams and two side beams to form an accommodating cavity, the battery cell can be placed in the accommodating cavity, and the support beams reduce the deformation of the battery cell along the third direction, and the side beams reduce the deformation of the battery cell along the second direction.

[0019] In some embodiments of the present application, along the first direction, the first press-fitting component is provided on a side of the side beam facing the opening.

[0020] By arranging the first pressing part on the side of the side beam facing the opening, the first pressing part and the side beam are staggered along the first direction. The first pressing part and the side beam can respectively reduce the expansion deformation of the battery cell along the second direction at different positions in the first direction.

[0021] In some embodiments of the present application, along the second direction, at least a portion of the first press-fitting component is disposed between the side beam and the battery cell.

[0022] By positioning at least a portion of the first press-fitting member between the side beam and the battery cell, the first press-fitting member and the side beam overlap in the first direction. The portion of the first press-fitting member and the side beam at the same location in the first direction can jointly reduce expansion deformation of the battery cell in the second direction. Furthermore, when the box body is deformed by an impact in the second direction, the portion of the first press-fitting member positioned between the side beam and the battery cell can prevent the deformed side beam from excessively squeezing the battery cell, thereby reducing damage to the battery cell.

[0023] In some embodiments of the present application, an outer surface of the first press-fit part is covered with an insulating layer.

[0024] By coating the outer surface of the first press-fitting component with an insulating layer, the occurrence of a short circuit between the first press-fitting component and the battery cell or other conductive components can be reduced, thereby improving the reliability of the battery device.

[0025] In some embodiments of the present application, a buffer is provided on a surface of the first pressing member facing the battery cell; and / or a buffer is provided on a surface of the first pressing member facing away from the battery cell.

[0026] By providing a buffer part on the surface of the first pressing part facing the battery cell, the impact force generated when the first pressing part collides with the battery cell can be reduced, thereby reducing damage to the battery cell or the first pressing part; and / or, by providing a buffer part on the surface of the first pressing part facing away from the battery cell, the impact force generated when the first pressing part collides with the inner wall surface of the box body can be reduced, thereby reducing damage to the first pressing part or the box body.

[0027] In some embodiments of the present application, at least one end of the first pressing part connected to the box body along the third direction is provided with a reinforcement, and the reinforcement is provided on a side of the first pressing part facing the battery cell.

[0028] By providing a reinforcement member at the end of the first press-fitting part, the connection strength of the end of the first press-fitting part can be improved, thereby reducing stress damage when the end of the first press-fitting part is connected to the box body. At the same time, by providing the reinforcement member on the side of the first press-fitting part facing the battery cell, the spacing between the first press-fitting part and the battery cell along the second direction can be increased, thereby reducing excessive compression of the battery cell by the first press-fitting part in the second direction.

[0029] In some embodiments of the present application, there are multiple battery cells, and the multiple battery cells form at least one battery cell assembly. The battery cell assembly includes at least two battery cells arranged in sequence along a third direction, and the orthographic projections of the battery cells in any battery cell assembly along the second direction have overlapping areas with the orthographic projections of the first press-fitting part along the second direction.

[0030] By making the orthographic projection of any battery cell in the battery cell assembly along the second direction overlap with the orthographic projection of the first pressing part along the second direction, that is, the first pressing part can be arranged relative to any battery cell in the battery cell assembly along the second direction, thereby limiting the position of any battery cell in the battery cell assembly along the second direction by the first pressing part, reducing the expansion of any battery cell in the battery cell assembly along the second direction and squeezing the box body to deform.

[0031] In some embodiments of the present application, there are multiple first press-fit parts, and at least one first press-fit part is respectively provided on two opposite sides of the accommodating cavity along the second direction.

[0032] By providing at least one first pressing part on opposite sides of the accommodating cavity along the second direction, the first pressing parts on opposite sides of the accommodating cavity along the second direction can jointly limit the battery cells in the accommodating cavity from expanding and deforming along the second direction, thereby reducing the deformation of the box body caused by the deformed battery cells squeezing along the second direction, and further reducing the phenomenon of cracking and damage of the box body, thereby improving the structural stability and reliability of the battery device.

[0033] In a second aspect, the present application proposes an electrical device having any one of the above-mentioned battery devices.

[0034] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0036] Figure 1 is a structural schematic diagram of a vehicle provided in one embodiment of the present application;

[0037] Figure 2 This is a schematic structural diagram of a battery cell assembly provided in one embodiment of the present application;

[0038] Figure 3 This is a schematic diagram of the exploded structure of a battery cell provided in one embodiment of the present application;

[0039] Figure 4 is a schematic structural diagram of a battery device provided in one embodiment of the present application;

[0040] Figure 5 yes Figure 4 A schematic diagram of the internal structure of the battery device with the upper cover removed;

[0041] Figure 6 yes Figure 5 A schematic diagram of the enlarged structure of part A;

[0042] Figure 7 yes Figure 5 Schematic diagram of the exploded structure of the battery device;

[0043] Figure 8 yes Figure 7 Schematic diagram of the enlarged structure of part B;

[0044] Figure 9 yes Figure 7 Schematic diagram of the structure of the support beam;

[0045] Figure 10 yes Figure 9 Schematic diagram of the enlarged structure of part C;

[0046] Figure 11 yes Figure 7 A schematic structural diagram of the first press-fitting part facing away from the battery cell;

[0047] Figure 12 yes Figure 11 Schematic diagram of the enlarged structure of part D in FIG;

[0048] Figure 13 yes Figure 7 A schematic structural diagram of the first pressing part facing the battery cell side;

[0049] Figure 14 yes Figure 13 Schematic diagram of the enlarged structure of part E;

[0050] Figure 15 This is a schematic structural diagram of the relative positions of the first press-fitted component and the side beam in another embodiment of the present application.

[0051] The accompanying drawings in the specific implementation manner are as follows:

[0052] 1. Vehicle;

[0053] 10. Battery device; 11. Controller; 12. Motor;

[0054] 20. Battery cell assembly; 21. Battery cell; 211. End cap; 212. Housing; 213. Electrode assembly; 214. Electrode terminal;

[0055] 30. Box body; 31. Box body; 311. Support beam; 3111. First support portion; 31111. Threaded hole; 3112. Second support portion; 312. Side beam; 313. End beam; 32. Upper cover;

[0056] 40. First press-fitting member; 41. Insulation layer; 42. Buffer member; 43. Mounting hole; 44. Reinforcement member;

[0057] 50. Connectors;

[0058] 60. Second press-fit part;

[0059] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0060] The following embodiments of the technical solution of the present application are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0061] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of this application should have the common meanings understood by technicians in the field to which the embodiments of this application belong.

[0062] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0063] In addition, the technical terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly indicate the quantity of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" includes two or more, unless otherwise specifically defined.

[0064] In the description of the embodiments of this application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on specific circumstances.

[0065] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0066] Currently, market developments indicate that power batteries are becoming increasingly widely used. Power batteries are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. Lithium-ion batteries, due to their high energy density, high average open-circuit voltage, and long cycle life, are widely used in mobile and portable appliances.

[0067] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. New energy vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the industry's sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0068] During the charge and discharge process, battery cells expand. In a module-less battery pack, the expansion force of the battery cells is borne entirely by the battery case, which can lead to the risk of cracking and damage in the battery case, thus reducing the reliability of the battery device.

[0069] To address the problem of cracking and damage to the battery case due to expansion of battery cells, this application proposes a battery device and an electrical device incorporating the same. The battery device of this application can reduce the risk of cracking and damage to the case, improving the structural stability and reliability of the battery device. Furthermore, when the battery device is impacted, the impact force on the battery cells can be reduced, thereby minimizing deformation or damage to the battery cells.

[0070] The battery device 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 multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0071] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, the battery cell assembly may be a battery module, which is formed by arranging and securing multiple battery cells to form a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0072] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies housed in the case.

[0073] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0074] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0075] As an example, the housing may include a first housing and a second housing. The first housing and the second housing engage to form an enclosed space within the housing to house the battery cell assembly. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0076] As an example, the box may include a top cover, a frame, and a bottom plate, wherein the top cover and the bottom plate are respectively connected to the frame to form a closed space inside the box to accommodate the battery cell assembly.

[0077] As an example, the box body can be used as a part of the chassis structure of the 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 crossbeam and longitudinal beam of the vehicle.

[0078] In some embodiments, the battery device refers to an energy storage device, which includes a box with a door on at least one side. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0079] In some embodiments, an energy storage device includes one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery modules connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0080] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it at the appropriate time. For example, an energy storage device can store electrical energy during periods of low electricity consumption and provide it to relevant users or electrical equipment during periods of peak electricity consumption. The energy storage system provided in the embodiments of the present application can be any power system that requires an energy storage device.

[0081] The technical solutions described in the embodiments of the present application are applicable to various electrical devices and energy storage devices that use battery cells and battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships, spacecraft and energy storage containers, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0082] Figure 1 This is a schematic diagram of the structure of the vehicle 1 provided in some embodiments of the present application. Figure 1 As shown, vehicle 1 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. A battery device 10 is disposed within vehicle 1. Battery device 10 can be located at the bottom, front, or rear of vehicle 1. Battery device 10 can be used to power vehicle 1. For example, battery device 10 can serve as an operating power source for vehicle 1. Vehicle 1 can also include a controller 11 and a motor 12. Controller 11 is used to control battery device 10 to power motor 12, for example, to meet the power requirements of vehicle 1 during startup, navigation, and driving.

[0083] In some embodiments of the present application, the battery device 10 can serve not only as an operating power source for the vehicle 1 , but also as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0084] Figure 2 FIG. 2 is a schematic structural diagram of a battery cell assembly 20 according to an embodiment of the present application. Figure 2 As shown, to meet different power requirements, the battery device 10 may include multiple battery cells 21. A battery cell 21 is the smallest unit that makes up the battery device 10. Multiple battery cells 21 can be connected in series and / or in parallel via electrode terminals for various applications. Multiple battery cells 21 can be connected in series, in parallel, or in a hybrid connection. Hybrid connection refers to a combination of series and parallel connections.

[0085] The battery cell assembly 20 may include multiple battery cells 21. Multiple battery cells 21 may be connected in series, in parallel, or in a mixed manner to form the battery cell assembly 20, and multiple battery cell assemblies 20 may then be connected in series, in parallel, or in a mixed manner to form the battery device 10. The battery cell 21 may be cylindrical, flat, rectangular, or in other shapes, and the embodiments of the present application are not limited to this. Battery cells 21 are generally divided into three types according to the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of the present application are not limited to this. However, for the sake of simplicity, the following embodiments are all described using a prismatic lithium-ion battery cell 21 as an example.

[0086] Figure 3 Schematic diagram of the exploded structure of a battery cell 21 provided in some embodiments of the present application. The battery cell 21 refers to the smallest unit that constitutes the battery device 10. Figure 4 The battery cell 21 includes an end cover 211 , a shell 212 and an electrode assembly 213 .

[0087] The end cap 211 refers to a component that covers the opening of the shell 212 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cap 211 can be adapted to the shape of the shell 212 to match the shell 212. Optionally, the end cap 211 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 211 is less likely to deform when squeezed or collided, so that the battery cell 21 can have higher structural strength and improved safety performance. Functional components such as electrode terminals 214 can be provided on the end cap 211. The electrode terminal 214 can be used to electrically connect to the electrode assembly 213 for outputting or inputting electrical energy from the battery cell 21. In some embodiments, the end cap 211 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold. In some embodiments, an insulating member may be provided inside the end cap 211 to isolate the electrical connection components in the housing 212 from the end cap 211 to reduce the risk of short circuits. For example, the insulating member may be made of plastic, rubber, or the like.

[0088] The housing 212 is a component that cooperates with the end cap 211 to form the internal environment of the battery cell 21. This internal environment can accommodate the electrode assembly 213, electrolyte (not shown), and other components. The housing 212 and the end cap 211 can be separate components. An opening can be provided in the housing 212, and the end cap 211 can be placed over the opening to form the internal environment of the battery cell 21. Alternatively, the end cap 211 and the housing 212 can be integrated. Specifically, the end cap 211 and the housing 212 can form a common connection surface before other components are inserted into the housing. When the interior of the housing 212 is to be enclosed, the end cap 211 is placed over the housing 212. The housing 212 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylinder, or a hexagonal prism. Specifically, the shape of the housing 212 can be determined based on the specific shape and size of the electrode assembly 213. The housing 212 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0089] The electrode assembly 213 is a component in the battery cell 21 where electrochemical reactions occur. One or more electrode assemblies 213 may be contained in the housing 212. The electrode assembly 213 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 213, and the parts of the positive and negative electrode sheets without active materials each constitute a tab (not shown in the figure). The positive and negative electrode tabs may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminals 214 to form a current loop.

[0090] Combine Figures 4 to 8 As shown, in a first aspect, the present application provides a battery device 10, which includes a box body 31, a battery cell 21, and a first pressing member 40. The box body 31 has an accommodating cavity formed therein. The accommodating cavity has an opening at one end along a first direction X, and the battery cell 21 is disposed in the accommodating cavity. The first pressing member 40 is disposed on at least one side of the accommodating cavity along a second direction Y. Both ends of the first pressing member 40 along a third direction Z are respectively connected to the box body 31, and are configured to limit the battery cell 21 along the second direction Y.

[0091] The second direction Y intersects the third direction Z, and a plane on which the second direction Y and the third direction Z are located is perpendicular to the first direction X.

[0092] Specifically, the battery device 10 includes a housing 30, which forms the overall exterior structure of the battery device 10 and includes a cavity within it for accommodating the battery cells 21 and other electrical components. The housing 30 may include a first portion and a second portion, which cover each other and together define a cavity for accommodating the battery cells 21. The first portion may be a hollow structure with one end open, and the second portion may be a plate-like structure, with the second portion covering the open side of the first portion. Alternatively, the first and second portions may both be hollow structures with one end open, with the open side of the first portion covering the open side of the second portion. The housing 30 may be a simple three-dimensional structure such as a single rectangular parallelepiped, cylinder, or sphere, or a complex three-dimensional structure composed of simple rectangular parallelepiped, cylinder, or sphere structures. The housing 30 may be made of alloy materials such as aluminum alloys and iron alloys, polymer materials such as polycarbonate and polyisocyanurate foam, or composite materials such as glass fiber and epoxy resin. In some embodiments of the present application, the box body 30 includes a box body 31 and an upper cover 32, wherein the box body 31 is a hollow structure with an opening at one end, and the upper cover 32 is provided at the opening at one end of the box body 31. Optionally, the upper cover 32 is also a hollow structure with an opening at one end. The box body 31 and the upper cover 32 are arranged relative to each other along the first direction X, and the battery cell 21 is placed in the accommodating cavity through the opening of the box body 31. After the battery device 10 is assembled to a vehicle or other electrical equipment, the box body 31 is arranged below the upper cover 32, and the first direction X can be a vertical direction, or the first direction X is arranged at an angle greater than or equal to 0° and less than 90° to the vertical direction.

[0093] The first pressing part 40 is provided on at least one side of the accommodating cavity along the second direction Y. The first pressing part 40 is connected to the box body 31 at both ends along the third direction Z. The connection method includes but is not limited to riveting or bolting. The first pressing part 40 is configured to limit the position of the battery cell 21 along the second direction Y. The first pressing part 40 may be in contact with the side of the battery cell 21 along the second direction Y, or a gap may exist between the first pressing part 40 and the side of the battery cell 21 along the second direction Y. Optionally, the first pressing part 40 may be a strip-shaped structure, including but not limited to a steel strip. Optionally, the second direction Y may be one of the length direction and the width direction of the battery device 10, and the third direction Z may be the other of the length direction and the width direction of the battery device 10, and the dimension of the battery device 10 along the length direction is greater than the dimension of the battery device 10 along the width direction.

[0094] According to the battery device 10 of the present application, the battery cell 21 can be placed in the accommodating cavity through the opening along the first direction X. By positioning the first pressing member 40 on at least one side of the accommodating cavity along the second direction Y, and connecting the first pressing member 40 to the case body 31 at both ends along the third direction Z, and being configured to restrict the position of the battery cell 21 along the second direction Y, the first pressing member 40 can reduce the battery cell 21 from expanding along the second direction Y and squeezing the case body 31 to deform, thereby reducing cracking and damage to the case body 31 and improving the structural stability and reliability of the battery device 10. Furthermore, when the battery device 10 is impacted along the second direction Y, the first pressing member 40 can reduce the impact force exerted on the battery cell 21 along the second direction Y, thereby reducing deformation or damage to the battery cell 21.

[0095] Combine Figures 4 to 8 As shown, in some embodiments of the present application, the box body 31 includes two support beams 311 arranged on opposite sides of the accommodating cavity along the third direction Z, the support beams 311 extend along the second direction Y, and the first press-fitting part 40 is connected to the two support beams 311 at both ends along the third direction Z.

[0096] Specifically, support beams 311 are provided on opposite sides of the accommodating cavity along the third direction Z. The battery cell 21 is positioned between the support beams 311 on both sides, thereby limiting the position of the battery cell 21 along the third direction Z. The first press-fitting member 40 is connected to the support beams 311 on opposite sides of the accommodating cavity at both ends along the third direction Z, using methods including, but not limited to, riveting or bolting.

[0097] Support beams 311 are provided on opposite sides of the accommodating cavity along the third direction Z, and are used to limit the position of the battery cell 21 in the accommodating cavity along the third direction Z and reduce deformation of the battery cell 21 along the third direction Z. The first press-fitting component 40 is connected to the two support beams 311 at both ends along the third direction Z, thereby securing the first press-fitting component 40 to one side of the battery cell 21 along the second direction Y and reducing expansion and deformation of the battery cell 21 along the second direction Y.

[0098] Combine Figures 4 to 10 As shown, in some embodiments of the present application, the support beam 311 includes a first support portion 3111 and a second support portion 3112 arranged in sequence along the first direction X, the first support portion 3111 is arranged on the side of the second support portion 3112 close to the opening, a cavity is formed inside the second support portion 3112, and the end of the first support portion 3111 along the second direction Y is connected to the first press-fit part 40.

[0099] Specifically, the interior of the second support portion 3112 is a hollow structure, thereby reducing the weight of the support beam 311. The first support portion 3111 can be a solid structure as a whole, or only the ends of the first support portion 3111 can be provided with a solid structure, thereby facilitating connection of the first support portion 3111 with the first press-fitting member 40 via the ends. Optionally, the first support portion 3111 and the second support portion 3112 can be a one-piece structure, or they can be separate structures.

[0100] The first support portion 3111 is arranged on the side of the second support portion 3112 close to the opening, which facilitates the connection between the first press-fit part 40 and the first support portion 3111. At the same time, the interior of the second support portion 3112 is set as a cavity, which can reduce the weight of the support beam 311 and reduce the cost of the support beam 311.

[0101] Combine Figures 4 to 12 As shown, in some embodiments of the present application, a support structure is provided in the end of the first support portion 3111 along the second direction Y toward the first press-fitting part 40, and the battery device 10 also includes a connecting member 50, which is sequentially passed through the first press-fitting part 40 and the support structure along the second direction Y and is connected to the support structure.

[0102] Specifically, the first support portion 3111 is provided with a support structure only within the end portion facing the first press-fitting member 40, while the middle portion of the first support portion 3111 is a hollow structure, thereby facilitating the reduction of the weight of the first support portion 3111. The connector 50 includes, but is not limited to, a rivet or a bolt. The connector 50 is sequentially arranged along the second direction Y through the first press-fitting member 40 and the support structure, and is connected to the support structure, thereby fixing and squeezing the first press-fitting member 40 between the connector 50 and the support structure. Optionally, the solid structure at the end of the first support portion 3111 can be a portion of the first support portion 3111, or the solid structure at the end of the first support portion 3111 can be formed separately and assembled to the end of the first support portion 3111. Optionally, the connector is a bolt, and the end of the first press-fitting member 40 is provided with a mounting hole 43, and the support structure is provided with a threaded hole 31111. The connector 50 passes through the mounting hole 43 and is threadedly connected to the threaded hole 31111.

[0103] By setting a supporting structure at the end of the first supporting portion 3111, the connecting member 50 can be connected to the supporting structure after passing through the first pressing member 40, thereby fixing the first pressing member 40 on one side of the battery cell 21 along the second direction Y and reducing the expansion deformation of the battery cell 21 along the second direction Y.

[0104] Combine Figures 4 to 8As shown, in some embodiments of the present application, the box body 31 also includes two side beams 312 arranged on opposite sides of the accommodating cavity along the second direction Y, and the side beams 312 extend along the third direction Z. The two support beams 311 and the two side beams 312 together form the accommodating cavity.

[0105] Specifically, side beams 312 are provided on both sides of the accommodating cavity along the second direction Y. The battery cell 21 is disposed between the side beams 312 on both sides, thereby limiting the position of the battery cell 21 along the second direction Y. The side beams 312 and the support beams 311 are connected end to end to enclose the accommodating cavity.

[0106] Optionally, the box body 31 further includes two end beams 313 spaced apart along the third direction Z. The ends of the side beams 312 at both ends along the third direction Z extend beyond the support beams 311 on both sides and are connected to the end beams 313 on both sides. The side beams 312 and the end beams 313 are connected end to end in sequence to form the frame structure of the box body 31.

[0107] By enclosing two support beams 311 and two side beams 312 to form an accommodating cavity, the battery cell 21 can be placed in the accommodating cavity, and the support beams 311 reduce the deformation of the battery cell 21 along the third direction Z, and the side beams reduce the deformation of the battery cell 21 along the second direction Y.

[0108] Combine Figures 4 to 8 As shown, in some embodiments of the present application, along the first direction X, the first pressing component 40 is provided on a side of the side beam 312 facing the opening.

[0109] Specifically, the first pressing member 40 and the side beam 312 are staggered and non-overlapping along the first direction X. The first pressing member 40 is used to limit the battery cell 21 along a section of the first direction X along the second direction Y, and the side beam 312 is used to limit the battery cell 21 along another section of the first direction X along the second direction Y.

[0110] By arranging the first pressing part 40 on the side of the side beam 312 facing the opening, the first pressing part 40 and the side beam 312 are staggered along the first direction X. The first pressing part 40 and the side beam 312 can respectively reduce the expansion deformation of the battery cell 21 along the second direction Y at different positions in the first direction X.

[0111] like Figure 15 As shown, in some embodiments of the present application, along the second direction Y, at least a portion of the first pressing member 40 is disposed between the side beam 312 and the battery cell 21 .

[0112] Specifically, the first pressing member 40 and the side beam 312 have an overlapping portion along the first direction X, so that part of the first pressing member 40 is disposed between the side beam 312 and the battery cell 21 along the second direction Y.

[0113] By positioning at least a portion of the first press-fitting member 40 between the side beams 312 and the battery cells 21, the first press-fitting member 40 and the side beams 312 overlap in the first direction X. The portions of the first press-fitting member 40 and the side beams 312 at the same position in the first direction X can collectively reduce expansion deformation of the battery cells 21 in the second direction Y. Furthermore, when the box body 31 is deformed by an impact in the second direction Y, the portions of the first press-fitting member 40 positioned between the side beams 312 and the battery cells 21 can prevent the deformed side beams 312 from excessively squeezing the battery cells 21, thereby reducing damage to the battery cells 21.

[0114] Combine Figures 6 to 14 As shown, in some embodiments of the present application, the outer surface of the first press-fitting part 40 is covered with an insulating layer 41 .

[0115] Specifically, in some embodiments of the present application, the first pressing member 40 may be a conductive member, such as a steel strip. To reduce electrical conduction between the first pressing member 40 and the battery cells 21, the outer surface of the first pressing member 40 is coated with an insulating layer 41. Optionally, the insulating layer 41 includes, but is not limited to, a PI film (polyimide film) layer.

[0116] By coating the outer surface of the first pressing component 40 with the insulating layer 41 , the short circuit between the first pressing component 40 and the battery cell 21 or other conductive components can be reduced, thereby improving the reliability of the battery device 10 .

[0117] Combine Figures 6 to 14 As shown, in some embodiments of the present application, a buffer member 42 is provided on the surface of the first pressing member 40 facing the battery cell 21 ; and / or a buffer member 42 is provided on the surface of the first pressing member 40 facing away from the battery cell 21 .

[0118] Specifically, a buffer member 42 is provided on the side of the first pressing member 40 facing the battery cell 21 along the second direction Y. Alternatively, a buffer member 42 is provided on the side of the first pressing member 40 facing away from the battery cell 21 along the second direction Y, that is, a buffer member 42 is provided on the side of the first pressing member 40 facing the adjacent side beam 312 along the second direction Y. Optionally, the buffer member 42 includes, but is not limited to, foam and rubber.

[0119] The provision of a buffer member 42 on the surface of the first pressing member 40 facing the battery cell 21 can reduce the impact force generated when the first pressing member 40 collides with the battery cell 21, thereby reducing damage to the battery cell 21 or the first pressing member 40. The provision of a buffer member 42 on the surface of the first pressing member 40 facing away from the battery cell 21 can reduce the impact force generated when the first pressing member 40 collides with the inner wall of the box body 31, thereby reducing damage to the first pressing member 40 or the box body 31.

[0120] Combine Figures 6 to 14 As shown, in some embodiments of the present application, at least one end of the first pressing part 40 connected to the box body 31 along the third direction Z is provided with a reinforcement 44, and the reinforcement 44 is provided on the side of the first pressing part 40 facing the battery cell 21.

[0121] Specifically, a reinforcement member 44 is provided at the end of the first press-fitting member 40 to increase the thickness of the end of the first press-fitting member 40 along the second direction Y, thereby improving the deformation resistance of the end of the first press-fitting member 40. The reinforcement member 44 includes, but is not limited to, a steel sheet, which is connected to the side of the first press-fitting member 40 facing the battery cell 21 by welding.

[0122] Providing a reinforcement member 44 at the end of the first pressing member 40 improves the connection strength of the end of the first pressing member 40, thereby reducing stress damage when the end of the first pressing member 40 is connected to the box body 31. Furthermore, by locating the reinforcement member 44 on the side of the first pressing member 40 facing the battery cell 21, the spacing between the first pressing member 40 and the battery cell 21 along the second direction Y can be increased, thereby reducing excessive compression of the battery cell 21 by the first pressing member 40 along the second direction Y.

[0123] Combine Figures 4 to 8 As shown, in some embodiments of the present application, the number of battery cells 21 is multiple, and the multiple battery cells 21 form at least one battery cell assembly 20. The battery cell assembly 20 includes at least two battery cells 21 arranged in sequence along the third direction Z, and the orthographic projections of the battery cells 21 in any battery cell assembly 20 along the second direction Y respectively have overlapping areas with the orthographic projections of the first press-fitting part 40 along the second direction Y.

[0124] Specifically, multiple battery cells 21 are electrically connected to each other to form at least one battery cell assembly 20, thereby increasing the voltage or capacity of the battery device 10. Each battery cell assembly 20 includes at least two battery cells 21 sequentially arranged along the third direction Z, and all battery cells 21 in each battery cell assembly 20 are arranged opposite the first press-fit component 40 along the second direction Y.

[0125] By making the orthographic projection of any battery cell 21 in the battery cell assembly 20 along the second direction Y overlap with the orthographic projection of the first pressing part 40 along the second direction Y, that is, the first pressing part 40 can be arranged relative to any battery cell 21 in the battery cell assembly 20 along the second direction Y, thereby limiting the position of any battery cell 21 in the battery cell assembly 20 along the second direction Y by the first pressing part 40, reducing the expansion of any battery cell 21 in the battery cell assembly 20 along the second direction Y and squeezing the box body 31 to deform.

[0126] Combine Figures 4 to 8 As shown, in some embodiments of the present application, there are multiple first press-fit parts 40, and at least one first press-fit part 40 is provided on opposite sides of the accommodating cavity along the second direction Y.

[0127] Specifically, there can be two first press-fit parts 40 , which are respectively arranged on both sides of the accommodating cavity along the second direction Y, and both ends of any first press-fit part 40 along the third direction Z are respectively connected to the support beam 311 .

[0128] By providing at least one first pressing part 40 on opposite sides of the accommodating cavity along the second direction Y, the first pressing parts 40 on opposite sides of the accommodating cavity along the second direction Y can jointly limit the battery cell 21 in the accommodating cavity from expanding and deforming along the second direction Y, thereby reducing the deformation of the box body 31 by squeezing the deformed battery cell 21 along the second direction Y, and further reducing the phenomenon of cracking and damage of the box body 31, thereby improving the structural stability and reliability of the battery device 10.

[0129] Combine Figure 4 and Figure 5 As shown, in some embodiments of the present application, the battery device 10 includes a second press-fitting member 60. The second press-fitting member 60 is disposed along the first direction X on the side of the battery cell 21 facing the opening, i.e., the side of the battery cell 21 facing the upper cover 32. Both ends of the second press-fitting member 60 along the third direction Z are connected to the support beam 311, thereby limiting the position of the battery cell 21 along the third direction Z. Optionally, the structure of the second press-fitting member 60 may be consistent with that of the first press-fitting member 40.

[0130] like Figure 1 As shown, the second aspect of the present application proposes an electrical device, which includes any one of the battery devices 10 described above.

[0131] Since the electrical equipment in the present application has the same technical features as the battery device 10 in any of the above embodiments and can achieve the same technical effects, it will not be described in detail here.

[0132] like Figure 1 As shown, in some embodiments of the present application, the electrical device may be a vehicle 1, which includes a battery device 10 according to any of the above embodiments. The battery device 10 is used to provide electrical energy to the vehicle 1 and to drive the vehicle 1 to move.

[0133] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0134] Combine Figures 4 to 14 As shown, in some embodiments of the present application, the battery device 10 includes a box body 31, a battery cell 21 and a first pressing component 40. A accommodating cavity is formed inside the box body 31, and the accommodating cavity is provided with an opening at one end along the first direction X. The battery cell 21 is arranged in the accommodating cavity. The first pressing component 40 is provided on at least one side of the accommodating cavity along the second direction Y. The two ends of the first pressing component 40 along the third direction Z are respectively connected to the box body 31 and are configured to limit the battery cell 21 along the second direction Y; wherein the second direction Y intersects with the third direction Z, and the plane where the second direction Y and the third direction Z are located is perpendicular to the first direction X.

[0135] Optionally, the box body 31 includes two support beams 311 disposed on opposite sides of the accommodating cavity along the third direction Z. The support beams 311 extend along the second direction Y, and the first press-fitting component 40 is connected to the two support beams 311 at both ends along the third direction Z. The support beams 311 include a first support portion 3111 and a second support portion 3112 disposed sequentially along the first direction X. The first support portion 3111 is disposed on a side of the second support portion 3112 closer to the opening. A cavity is formed within the second support portion 3112. The end of the first support portion 3111 along the second direction Y is connected to the first press-fitting component 40.

[0136] Optionally, a support structure is provided in the first support portion 3111 along the second direction Y toward the end of the first pressing part 40, and the battery device 10 also includes a connecting member 50, which is sequentially passed through the first pressing part 40 and the support structure along the second direction Y and connected to the support structure.

[0137] Optionally, the box body 31 further includes two side beams 312 disposed on opposite sides of the accommodating cavity along the second direction Y. The side beams 312 extend along the third direction Z. The two support beams 311 and the two side beams 312 together form the accommodating cavity. In the first direction X, the first press-fitting member 40 is disposed on the side of the side beam 312 facing the opening.

[0138] Optionally, the outer surface of the first press-fitting member 40 is coated with an insulating layer 41, and a buffer member 42 is provided on the surface of the first press-fitting member 40 facing the battery cell 21 and the surface facing away from the battery cell 21. Reinforcements 44 are provided at each end of the first press-fitting member 40 connected to the box body 31 along the third direction Z. The reinforcements 44 are provided on the side of the first press-fitting member 40 facing the battery cell 21.

[0139] Optionally, there are multiple battery cells 21, and multiple battery cells 21 form at least one battery cell assembly 20. The battery cell assembly 20 includes at least two battery cells 21 arranged in sequence along the third direction Z, and the orthographic projections of the battery cells 21 in any battery cell assembly 20 along the second direction Y have overlapping areas with the orthographic projections of the first pressing part 40 along the second direction Y.

[0140] Optionally, there are multiple first press-fit parts 40 , and at least one first press-fit part 40 is provided on opposite sides of the accommodating cavity along the second direction Y.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body, wherein a receiving cavity is formed inside the box body, and an opening is provided at one end of the receiving cavity along the first direction; a battery cell, the battery cell being disposed in the accommodating cavity; a first pressing member, the first pressing member being provided on at least one side of the accommodating cavity along the second direction, the two ends of the first pressing member along the third direction being respectively connected to the box body, and being configured to limit the position of the battery cell along the second direction; The second direction intersects the third direction, and a plane on which the second direction and the third direction are located is perpendicular to the first direction.

2. The battery device according to claim 1, wherein: The box body includes two support beams arranged on opposite sides of the accommodating cavity along the third direction, the support beams extend along the second direction, and the first press-fitting part is connected to the two support beams at both ends along the third direction.

3. The battery device according to claim 2, characterized in that The support beam includes a first support portion and a second support portion arranged in sequence along the first direction, the first support portion is arranged on a side of the second support portion close to the opening, a cavity is formed inside the second support portion, and the end of the first support portion along the second direction is connected to the first press-fit part.

4. The battery device according to claim 3, characterized in that A supporting structure is provided in the end of the first supporting portion toward the first pressing member along the second direction. The battery device further includes a connecting member, which is sequentially provided through the first pressing member and the supporting structure along the second direction and connected to the supporting structure.

5. The battery device according to claim 2, wherein: The box body further includes two side beams arranged on opposite sides of the accommodating cavity along the second direction, the side beams extending along the third direction, and the two support beams and the two side beams together form the accommodating cavity.

6. The battery device according to claim 5, characterized in that Along the first direction, the first pressing part is arranged on a side of the side beam facing the opening.

7. The battery device according to claim 5, characterized in that Along the second direction, at least a portion of the first pressing member is disposed between the side beam and the battery cell.

8. The battery device according to any one of claims 1 to 7, characterized in that: The outer surface of the first press-fitting part is covered with an insulating layer.

9. The battery device according to any one of claims 1 to 7, characterized in that: A buffer is provided on a surface of the first pressing member facing the battery cell; and / or a buffer is provided on a surface of the first pressing member facing away from the battery cell.

10. The battery device according to any one of claims 1 to 7, characterized in that: At least one end of the first pressing member connected to the box body along the third direction is provided with a reinforcement member, and the reinforcement member is provided on a side of the first pressing member facing the battery cell.

11. The battery device according to any one of claims 1 to 7, characterized in that: There are multiple battery cells, and the multiple battery cells form at least one battery cell assembly. The battery cell assembly includes at least two battery cells arranged in sequence along the third direction, and the orthographic projections of the battery cells in any one of the battery cell assemblies along the second direction have overlapping areas with the orthographic projections of the first press-fitting part along the second direction.

12. The battery device according to claim 11, characterized in that: There are multiple first press-fit parts, and at least one first press-fit part is respectively provided on two opposite sides of the accommodating cavity along the second direction.

13. An electrical device, characterized in that: A battery device according to any one of claims 1 to 12 is provided.

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