Battery device and electric appliance

Abstract

The embodiment of the application provides a battery device and a power utilization equipment, and relates to the technical field of batteries. The battery device comprises a battery box, a battery monomer and a first limiting piece. The battery box comprises a bottom wall and a plurality of side walls connected to the bottom wall, and the plurality of side walls comprise two opposite first edge beams. At least one battery monomer is installed on the bottom wall and located between the two first edge beams. The battery monomer has two opposite first surfaces, the first surface is the surface with the largest area of the battery monomer, and the arrangement direction of the two first surfaces is consistent with the arrangement direction of the two first edge beams. The first limiting piece is connected with the two first edge beams respectively, and the first limiting piece limits the side of the battery monomer away from the bottom wall. The application has the effect of better resisting the expansion of the battery monomer, and can improve the energy density of the battery device to a certain extent.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device and an electrical appliance. Background Technology

[0002] A battery device includes a battery housing and individual battery cells located within the housing. To limit the expansion of the individual cells, related technologies employ expansion beams mounted on the side walls of the battery housing to restrict the large-area expansion of the individual cells. However, the effectiveness of this method in limiting cell expansion needs improvement. Therefore, further enhancing the battery housing's ability to resist cell expansion is a research direction in battery technology. Utility Model Content

[0003] This application provides a battery device and an electrical appliance that can improve the battery housing's resistance to the expansion of individual battery cells.

[0004] In a first aspect, embodiments of this application provide a battery device, including a battery housing, a battery cell, and a first limiting member. The device includes a bottom wall and two first side beams, each connected to the bottom wall and arranged opposite to the other. At least one battery cell is mounted on the bottom wall and located between the two first side beams. The battery cell has two opposite first surfaces, each first surface being the surface with the largest area. The arrangement direction of the two first surfaces is consistent with the arrangement direction of the two first side beams. The first limiting member is located on the side of the battery cell facing away from the bottom wall and is connected to the two first side beams, with the first limiting member engaging with the side of the battery cell facing away from the bottom wall.

[0005] The above technical solution arranges the two first surfaces of the battery cell as the large surface area in a direction consistent with the arrangement of the two first side beams. A first limiting member connects the two first side beams, and the two first side beams and the first limiting member together form a limiting structure to restrict the expansion of the large surface area of ​​the battery cell. Compared to related technologies that use expansion beams on both sides of the battery cell to restrict its expansion, the first side beams and the first limiting member as a whole have a better effect in resisting battery cell expansion. When there are multiple battery cells, it can compress the gaps between them, resulting in a more compact arrangement and increased energy density. Furthermore, using the first limiting member to limit the side of the battery cell away from the bottom wall allows for better fixation of the battery cell within the battery housing, eliminating the need for extensive potting on the bottom wall of the battery housing. This further optimizes the internal space of the battery housing and reduces the overall weight of the battery device.

[0006] In some embodiments of this application, the first limiting member includes two opposite first ends, which are installed one-to-one on the side of the two first side beams away from the bottom wall.

[0007] By adopting the above technical solution, the first end is installed on the side of the first side beam away from the bottom wall, eliminating the need to reserve assembly space for the first end inside the battery box. This allows for further optimization of the internal space of the battery box to accommodate more battery cells, thereby further improving the energy density of the battery device.

[0008] In some embodiments of this application, the first end is provided with at least one first connecting structure, and the side of the first side beam away from the bottom wall is provided with at least one second connecting structure. The first connecting structure and the second connecting structure are connected by a first connector.

[0009] The above technical solution provides a first connecting structure at the first end and a second connecting structure at the second end. The first connecting piece is used to connect the first connecting structure and the second connecting structure, thereby achieving the connection between the first end and the first side beam. Compared with welding, using the first connecting piece to connect the first end and the first side beam is more convenient and faster, and will not damage the battery box and battery cells.

[0010] In some embodiments of this application, the first connecting structure includes a first connecting hole, the second connecting structure includes a second connecting hole, and the first connector passes through and connects to the first connecting hole and the second connecting hole to mate with the first end and the first side beam.

[0011] By adopting the above technical solution, the connection between the first end and the first side beam is achieved by using the connector to connect the first connecting hole and the second connecting hole. The structure is simple and easy to assemble and disassemble.

[0012] In some embodiments of this application, the number of battery cells is multiple, and the multiple battery cells are arranged in at least multiple rows. Each row of battery cells includes multiple battery cells arranged along a second direction, which is the arrangement direction of the two first side beams.

[0013] By adopting the above technical solution, the battery cells are designed to be multiple and in multiple rows, so that the two first side beams can simultaneously resist the expansion of multiple battery cells.

[0014] In some embodiments of this application, the battery cells located at both ends in the second direction in each row of battery cells abut against the two first side beams respectively.

[0015] By adopting the above technical solution, the battery cells located at both ends of the second direction in each row abut against the first side beam. The first side beam is used to limit the large-area expansion of the battery cells, further reducing the possibility of battery cell expansion and deformation.

[0016] In some embodiments of this application, the first limiting member is respectively limited and engaged with the side of two adjacent rows of battery cells away from the bottom wall along the first direction, and the first direction intersects the second direction and the arrangement direction of the battery cells to the bottom wall.

[0017] By adopting the above technical solution, the first limiting member is respectively limited and engaged with the side of the adjacent two rows of battery cells away from the bottom wall, so that one first limiting member can press down multiple battery cells in two rows, making it multi-functional and simplifying the structure.

[0018] In some embodiments of this application, the battery device further includes a second limiting member along the arrangement direction of the battery cells to the bottom wall. One side of the second limiting member is connected to the bottom wall, and / or the other side of the opposite sides of the second limiting member is connected to the first limiting member. The second limiting member is used to limit the displacement of the battery cells along a first direction, which intersects the arrangement direction of the two first side beams and the arrangement direction of the battery cells to the bottom wall.

[0019] By adopting the above technical solution, the second limiting member is used as the limiting beam for the battery cell. This not only restricts the displacement of the battery cell along the first direction, but also connects the first limiting member and the bottom wall with the second limiting member. This allows the bottom wall, the second limiting member, the first limiting member, and the two first side beams to form a structure that resists the large-area expansion of the battery cell, further improving the battery box's ability to resist the expansion of the battery cell.

[0020] In some embodiments of this application, along a second direction, the second limiting member includes two opposite second ends, which abut or are clearance-fitted with the two first side beams, and the second direction is the arrangement direction of the two first side beams.

[0021] By adopting the above technical solution, the second end is fitted with the two first side beams or with a gap. Compared with welding or tenon joints, there is no need to reserve assembly space for the connection between the second end and the first side beams, which further optimizes the internal space of the box.

[0022] In some embodiments of this application, the side of the second limiting member opposite to the bottom wall is connected to the middle region of the first limiting member along the first direction.

[0023] By adopting the above technical solution, the second limiting member is connected to the middle area of ​​the first limiting member along the first direction, so that a part of the first limiting member is located on one side of the second limiting member along the first direction, and the other part is located on the other side of the second limiting member along the first direction. The battery cells on both sides of the second limiting member can be pressed by the first limiting member on one side and the other side.

[0024] In some embodiments of this application, the second limiting member and the bottom wall are integrally formed, and / or the second limiting member and the first limiting member are integrally formed.

[0025] By adopting the above technical solution, the second limiting member and the bottom wall are designed as an integral part, eliminating the need for welding or mortise and tenon joints to connect the second limiting member and the first side beam. There is no need to reserve assembly space for the second limiting member inside the battery box. Similarly, by designing the second limiting member and the first limiting member as an integral part, there is no need to reserve assembly space for the two inside the battery box. This allows for further optimization of the internal space of the battery box to accommodate more battery cells, thereby further improving the energy density of the battery device.

[0026] In some embodiments of this application, the second limiting member and the first limiting member are assembled into an integral structure.

[0027] By adopting the above technical solution, the second limiting member and the first limiting member are assembled into a single structure, which can improve the connection stability between the two.

[0028] In some embodiments of this application, the first limiting member is provided with at least one welding structure for welding with the second limiting member, the welding structure including a weld seam or a weld groove.

[0029] By adopting the above technical solution, the welding structure facilitates the welding of the second limiting member and the first limiting member.

[0030] In some embodiments of this application, the number of battery cells is multiple, and the multiple battery cells include at least two rows along the first direction, each row including multiple battery cells arranged sequentially along the second direction, the second direction being the arrangement direction of the two first side beams, and the second limiting member is located between two adjacent rows of battery cells.

[0031] By using the above technical solution, a second limiting component is used to separate two adjacent rows of battery cells, which can simultaneously limit and fix the two rows of battery cells.

[0032] In some embodiments of this application, the side of the first side beam opposite to the battery cell is provided with a mounting structure for connecting electrical equipment.

[0033] The above technical solution includes a mounting structure on the first side beam, which can increase the structural strength of the first side beam to a certain extent.

[0034] In some embodiments of this application, there are multiple mounting structures, and the multiple mounting structures are arranged along a first direction on the first side beam. The first direction intersects the arrangement direction of the two first side beams and the arrangement direction of the battery cell to the bottom wall.

[0035] By adopting the above technical solution, the number of mounting structures is designed to be multiple, arranged along the first direction, which can further increase the structural strength of the first side beam.

[0036] In some embodiments of this application, the battery cell has an adhesive on the side facing the bottom wall, and the battery cell is connected to the bottom wall through the adhesive.

[0037] By using the above technical solution, the bottom surface of the battery cell is coated with adhesive to connect to the bottom wall, which can improve the stability of the battery cell placed on the bottom wall.

[0038] In some embodiments of this application, the first side beam is provided with a cavity and a reinforcing rib located in the cavity. The cavity is provided with two first inner wall surfaces opposite each other along a second direction. The reinforcing ribs are respectively connected to the two first inner wall surfaces. The second direction is the arrangement direction of the two first side beams.

[0039] By adopting the above technical solution, the first side beam is provided with a cavity and a reinforcing rib located in the cavity. The reinforcing rib can improve the structural strength of the first side beam in the second direction and reduce the possibility of deformation of the first side beam under the expansion of the battery cell.

[0040] In some embodiments of this application, the bottom wall is provided with a cooling medium flow channel.

[0041] By adopting the above technical solution, a cooling medium flow channel is provided on the bottom wall, which can cool the battery cells and reduce the possibility of thermal runaway caused by excessively high battery cell temperature.

[0042] In some embodiments of this application, the battery device is used to be installed in a vehicle and to provide electrical energy or store electrical energy for the vehicle, and the arrangement direction of the two first side beams is consistent with the wheel axis of the vehicle.

[0043] Using the above technical solution, the arrangement direction of the two first side beams is consistent with the wheel axis of the vehicle, that is, the first side beams are the side beams on the left and right sides of the battery device installed on the vehicle.

[0044] Secondly, embodiments of this application provide an electrical device including a battery device as described in any of the above technical solutions, wherein the battery device is used to provide electrical energy. Attached Figure Description

[0045] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of an electrical device provided in some embodiments of this application;

[0047] Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0048] Figure 3 Top view of a battery device provided for some embodiments of this application;

[0049] Figure 4 Exploded views of battery devices provided in some embodiments of this application;

[0050] Figure 5 for Figure 4 Enlarged view of part A;

[0051] Figure 6 for Figure 3 AA section diagram;

[0052] Figure 7 for Figure 6 Enlarged view of part b;

[0053] Figure 8 A BB cross-sectional view of a battery device provided in some embodiments of this application.

[0054] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0055] 1000, vehicles;

[0056] 100. Battery device;

[0057] 10. Battery housing; 11. Bottom wall; 111. Cooling medium flow channel; 12. First side beam; 121. Mounting structure; 1211. Mounting component; 1212. Mounting hole; 122. Cavity; 1221. First inner wall surface; 123. Reinforcing rib; 13. Second side beam;

[0058] 20. Battery cell; 21. First surface;

[0059] 30. First limiting member; 31. First end; 32. First connecting member; 33. Welded structure;

[0060] 40. Second limiting element; 41. Second end piece;

[0061] 200. Controller;

[0062] 300. Motor;

[0063] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0065] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0066] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0067] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0068] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, H and / or B can represent: H existing alone, H and B existing simultaneously, and B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0069] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0070] In this application, "multiple" means two or more (including two).

[0071] A battery assembly typically includes a battery housing and individual battery cells located within the housing. The battery housing withstands external impacts and pressures, protecting the internal components from physical damage and reducing the risk of damage due to collisions or drops. An expansion beam is installed inside the battery housing, with the larger surface area of ​​each battery cell facing the expansion beam. The expansion beam restricts the expansion of the battery cell's larger surface area, thereby reducing deformation or damage to the battery housing when the battery cell expands.

[0072] However, due to limited space within the battery box, the size of the expansion beams cannot be made too large, resulting in insufficient structural strength to fully resist the large-area expansion of the battery cells. The effectiveness of the expansion beams in resisting this expansion needs improvement. Related technologies, to enhance the battery box's ability to resist the expansion forces of the battery cells, typically involve adding longitudinal beams to connect two expansion beams. This requires optimizing the cross-section of the expansion beams and further using methods such as rivets and self-tapping screws to fix the expansion beams to the bottom wall. This complex structure occupies a significant amount of space within the battery box, reducing its volume utilization rate and decreasing the number of battery cells that can be placed inside, thus lowering the energy density of the battery device.

[0073] In addition, a large expansion gap needs to be reserved between two adjacent battery cells to provide expansion buffer space, which further reduces the volume utilization rate of the battery box.

[0074] In addition to the problems mentioned above, in order to limit the displacement of individual battery cells within the battery housing along the vertical bottom wall, related technologies typically involve applying a large area of ​​adhesive to the bottom wall to house the individual battery cells. This undoubtedly reduces the internal space of the battery housing and increases the overall weight of the battery assembly.

[0075] Therefore, how to improve the battery casing's ability to resist the expansion of individual battery cells without affecting the energy density of the battery device is an important issue in the research and development of battery devices and related components.

[0076] In view of this, this application provides a technical solution that uses two first side beams of the battery box as structures to restrict the expansion of battery cells, and uses a first limiting member to connect the two first side beams. This not only improves the ability of the two first side beams to restrict the expansion of battery cells, reduces the expansion gap between the two battery cells, and improves the space utilization of the battery box, thereby increasing the energy density of the battery device, but also enables the limiting and pressing of the side of the battery cell away from the bottom wall, so that it is not necessary to pot a large area of ​​glue on the bottom wall to place the battery cell.

[0077] The following is in conjunction with the appendix Figure 1-8 The battery device 100 and electrical equipment provided in the embodiments of this application will be described.

[0078] Combined with appendix Figure 1 As shown, this application provides an electrical device, which can be a vehicle 1000, a mobile phone, a portable device, a laptop, a ship, a spacecraft, an electric toy, and a power tool, etc. The vehicle 1000 can be a gasoline-powered car, a natural gas-powered car, or a new energy vehicle; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical device.

[0079] For ease of explanation, the following embodiments will use a vehicle 1000 as an example of electrical equipment.

[0080] Vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Vehicle 1000 has a battery device 100 installed inside, which can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the operating power source for the vehicle. Vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power needs of starting, navigation, and driving the vehicle.

[0081] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0082] Combined with appendix Figure 2-4 As shown, this application embodiment provides a battery device 100, including a battery housing 10, a battery cell 20, and a first limiting member 30. The battery housing 10 includes a bottom wall 11 and two first side beams 12. The two first side beams 12 are respectively connected to the bottom wall 11 and are arranged opposite to each other. At least one battery cell 20 is installed on the bottom wall 11 and located between the two first side beams 12. The battery cell 20 has two opposite first surfaces 21. The first surface 21 is the surface with the largest area of ​​the battery cell 20. The arrangement direction of the two first surfaces 21 is consistent with the arrangement direction of the two first side beams 12. The first limiting member 30 is located on the side of the battery cell 20 away from the bottom wall 11 and is respectively connected to the two first side beams 12. The first limiting member 30 is in a limiting cooperation with the side of the battery cell 20 away from the bottom wall 11.

[0083] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connections via a busbar. The battery cells 20 are suitable for batteries and electrical devices that use batteries.

[0084] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 20; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into a single module. As an example, a battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0085] In some embodiments, the battery device 100 may be a battery pack, which includes a battery housing 10 and one or more battery cell assemblies, the battery cell assemblies being housed in the battery housing 10.

[0086] As an example, the battery cell assembly can be a battery module, which can be housed in the battery housing 10 by fixing the battery module in the battery housing 10.

[0087] As an example, the battery cell assembly can also be housed in the battery housing 10 by directly fixing multiple battery cells 20 to the battery housing 10.

[0088] As an example, the battery housing 10 may include a first housing and a second housing (not shown in the figure). The first housing and the second housing are fastened together to form a closed space inside the battery housing 10 to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The battery housing 10 formed by the first housing and the second housing can have various shapes, such as a cylinder, a cuboid, etc., which will not be listed one by one.

[0089] As an example, the battery box 10 can be part of the chassis structure of the vehicle 1000. For example, the top cover of the battery box 10 can be at least part of the floor of the vehicle 1000, or the frame of the battery box 10 can be at least part of the crossbeams and longitudinal beams of the vehicle 1000.

[0090] In some embodiments, battery device 100 refers to an energy storage device, which includes a battery housing 10, and at least one side of the battery housing 10 has a door. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0091] The battery cell 20 mentioned in the embodiments of this application may include an electrode assembly (not shown in the figure) and an electrolyte. The electrode assembly includes a positive electrode, a negative electrode, and a separator. The battery cell 20 mainly relies on the movement of metal ions between the positive and negative electrode to operate. The positive electrode includes a positive current collector and a positive active material layer, the positive active material layer being coated on the surface of the positive current collector; the positive current collector includes a positive coating area and a positive electrode tab connected to the positive coating area, the positive coating area being coated with the positive active material layer, and the positive electrode tab not being coated with the positive active material layer.

[0092] Taking a lithium-ion battery cell 20 as an example, the positive electrode current collector can be made of aluminum, and the positive electrode active material layer includes positive electrode active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative electrode current collector and a negative electrode active material layer, with the negative electrode active material layer coated on the surface of the negative electrode current collector. The negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area. The negative electrode coating area is coated with the negative electrode active material layer, while the negative electrode tab is not coated with the negative electrode active material layer. The negative electrode current collector can be made of copper, and the negative electrode active material layer includes negative electrode active material, which can be carbon or silicon, etc. The separator can be made of PP (polypropylene) or PE (polyethylene), etc.

[0093] The battery device 100 provided in this embodiment includes a battery housing 10, a battery cell 20, and a first limiting member 30. The bottom wall 11 and a plurality of side walls connected to the bottom wall 11 enclose the aforementioned first housing. It should be noted that in this embodiment, the "bottom" in "bottom wall 11" refers to the orientation shown in the attached drawings. In the actual application or transportation of the battery device 100, the bottom wall 11 may be located above the battery cell 20 rather than necessarily below it.

[0094] The multiple sidewalls include two first side beams 12 opposite each other along a second direction Y and two second side beams 13 opposite each other along a first direction X. In some embodiments, the length of the first side beams 12 is greater than the length of the second side beams 13.

[0095] The two ends of the first side beam 12 are connected to the two second side beams 13 respectively, and similarly, the two ends of the second side beams 13 are connected to the two first side beams 12 respectively, so as to form a rectangular frame-shaped side wall. Of course, the number of side walls and the shape formed by them in this embodiment are not limited to this. For example, the shape formed by the multiple side walls can also be hexagonal, octagonal, etc., which will not be listed one by one in this embodiment.

[0096] The number of battery cells 20 is at least one, that is, the number of battery cells 20 can be one or more. When the number of battery cells 20 is one, one battery cell 20 is located between two first side beams 12 and abuts against the two first side beams 12 respectively.

[0097] When there are multiple battery cells 20, the multiple battery cells 20 can be divided into multiple rows along the first direction X in the figure. Each row includes multiple battery cells 20 arranged sequentially along the second direction Y. In some embodiments, the multiple battery cells 20 in each row can form a battery cell assembly as described above. Each battery cell assembly is located between two first side beams 12 and abuts against the two first side beams 12 respectively.

[0098] In this embodiment, the first direction X, the second direction Y, and the third direction Z intersect each other. In some embodiments, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0099] Each battery cell 20 has two opposite first surfaces 21. The first surface 21 is the surface with the largest area of ​​the battery cell 20, that is, the area of ​​the first surface 21 is greater than the area of ​​any other surface of the battery cell 20.

[0100] Unlike related technologies where the large surface of the battery cell 20 is set to the expansion beam, this embodiment sets the battery cell 20 so that the arrangement direction of the two first surfaces 21 is consistent with the arrangement direction of the two first side beams 12, so that the two first surfaces 21 are set facing the two first side beams 12 one by one, and thus the first surfaces 21 can expand towards the two first side beams 12 when they expand.

[0101] Furthermore, in this embodiment, a first limiting member 30 is installed on the battery housing 10. The first limiting member 30 is located on the side of the battery cell 20 away from the bottom wall 11, and the first limiting member 30 has two opposite first ends 31. The first ends 31 are connected to the two first side beams 12 one by one, that is, one first end 31 is connected to one of the first side beams 12, and the other first end 31 is connected to the other first side beam 12.

[0102] In this way, the first limiting member 30 can be connected to the two first side beams 12 to form a structure that resists the expansion of the first surface 21 (large surface) of the battery cell 20.

[0103] Compared to related technologies that use expansion beams on both sides of the battery cell 20 to limit the large-area expansion of the battery cell 20, the first side beam 12 and the first limiting member 30 together have a better effect in resisting the expansion of the battery cell 20. When there are multiple battery cells 20, the expansion gap between two adjacent battery cells 20 along the second direction Y can be compressed, making the arrangement of the battery cells 20 more compact and improving the energy density of the battery cells 20.

[0104] Furthermore, the first limiting member 30 is engaged with the side of the battery cell 20 away from the bottom wall 11. Specifically, the first limiting member 30 may abut against the side of the battery cell 20 away from the bottom wall 11 or have a gap, thereby limiting the displacement of the battery cell 20 along the bottom wall 11 to the arrangement direction of the battery cells 20 (the third direction Z in the figure). In some embodiments, the first limiting member 30 may press the side of the battery cell 20 away from the bottom wall 11, that is, the upper surface in the figure.

[0105] In this way, by using the first limiting member 30 to limit the side of the battery cell 20 away from the bottom wall 11, the battery cell 20 can be better fixed inside the battery box 10. There is no need to use a large area of ​​glue to fix the battery cell 20 on the bottom wall 11 of the battery box 10. This can further optimize the internal space of the battery box 10 and reduce the overall weight of the battery device 100.

[0106] Combined again with the appendix Figure 2-4 As shown, in some examples, optionally, the first limiting member 30 has two opposite first ends 31, which are installed one-to-one on the side of the two first side beams 12 away from the bottom wall 11.

[0107] It should be noted that the "first end 31" in this embodiment refers to the end structure with a certain structural length located at one end of the first limiting member 30 along the second direction Y in the figure, and does not refer to the two end faces of the first limiting member 30 along the second direction Y.

[0108] In this embodiment, the first end 31 is installed on the side of the first side beam 12 away from the bottom wall 11. The installation method can be any kind of mechanical fixed connection method, and it is necessary to enable the first limiting member 30 to provide a certain constraint force to the two first side beams 12 along the second direction Y in the figure, so as to reduce the deformation of the first side beam 12 along the second direction Y under the expansion of the battery cell 20.

[0109] Unlike related technologies that install expansion beams on the inner wall of the side wall by welding or tenon joints, by installing the first end 31 on the side of the first side beam 12 away from the bottom wall 11, it is not necessary to reserve assembly space for the first end 31 inside the battery box 10. This allows for further optimization of the space inside the battery box 10 to accommodate more battery cells 20, thereby further improving the energy density of the battery device 100.

[0110] Combined with appendix Figure 4-8 As shown, in some examples, optionally, the first end 31 is provided with at least one first connecting structure, and the side beam 12 is provided with at least one second connecting structure on the side away from the bottom wall 11. The first connecting structure and the second connecting structure are connected by a first connector 32.

[0111] The first connecting structure and the second connecting structure can be holes or slots, respectively. The first connecting member 32 passes through the first connecting structure and docks with the second connecting structure.

[0112] When the first connecting structure and the second connecting structure are connected by the first connecting member 32, when the two first side beams 12 are subjected to the expansion force of the battery cell 20 along the second direction Y, the expansion force of the first side beams 12 can be transmitted to the first limiting member 30 through the first connecting member 32. The first limiting member 30 tightens the two first side beams 12 through the first connecting member 32, reducing the possibility of the two first side beams 12 deforming along the second direction Y.

[0113] In some embodiments, the number of first connectors 32 can be multiple. For example, multiple first connectors 32 are arranged at intervals along the first direction X and / or the second direction Y in the figure. Correspondingly, the number of first connecting structures and second connecting structures are also multiple. Multiple first connectors 32 are connected to multiple first connecting structures one by one, and multiple first connectors 32 are connected to multiple second connecting structures one by one. The increase in the number of first connectors 32 is used to increase the tension of the first limiting member 30 on the two first side beams 12, and further improve the ability of the two first side beams 12 to resist the expansion of the battery cell 20.

[0114] Compared to welding, using the first connector 32, the first connecting structure, and the second connecting structure to connect the first end 31 and the first side beam 12 is not only more convenient and faster, but also will not damage the battery box 10 and the battery cell 20. In addition, it increases the connection stability between the two first side beams 12 and the first limiting member 30, thereby improving the overall ability of the expansion-limiting structure formed by the two first side beams 12 and the first limiting member 30 to resist the expansion of the battery cell 20.

[0115] In some examples, optionally, the first connection structure includes a first connection hole, the second connection structure includes a second connection hole, and the first connector 32 passes through and connects to the first connection hole and the second connection hole to mate with the first end 31 and the first side beam 12.

[0116] Due to the obstruction of the first connector 32 and the first limiting member 30, the first connecting hole and the second connecting hole are not labeled in the drawings in this embodiment. In some embodiments, the first connecting hole is a through hole and the second connecting hole is a blind hole.

[0117] In some embodiments, the first connector 32 is a riveted member or a threaded connector. Specifically, the first connector 32 can be understood as a rivet or a bolt. When the first connector 32 is a rivet, the rivet includes a rivet head with a larger radial dimension and a rivet post with a smaller radial dimension and similar to a column. The first connecting hole and the second connecting hole can be designed to be able to be inserted into the rivet post. The rivet head is limited and engaged with the upper surface of the first limiting member 30, thereby realizing the docking of the rivet with the first connecting hole and the second connecting hole respectively.

[0118] When the first connector 32 is a bolt, the first connecting hole can be a through hole without threads or a threaded hole with threads. The second connecting hole is a threaded hole. The connection between the first end 31 and the first side beam 12 is achieved by using a bolt passing through the first connecting hole and connecting with the threaded connection of the second connecting hole.

[0119] This method of using riveted or threaded connectors to align the first and second connecting holes to achieve the connection between the first end 31 and the first side beam 12 has advantages such as simple structure and easy assembly and disassembly.

[0120] In some examples, there are multiple battery cells 20, and the multiple battery cells 20 are arranged in at least multiple rows. Each row of battery cells 20 includes multiple battery cells 20 arranged along a second direction Y, which is the arrangement direction of the two first side beams 12.

[0121] Multi-row battery cells 20 refers to two or more rows, such as the four rows shown in the figure. In some embodiments, each row of battery cells 20 may include a plurality of spaced-apart battery cells 20, and each row of battery cells 20 may form a battery cell assembly as described above.

[0122] The battery cells 20 are designed in multiple rows, so that the two first side beams 12 can simultaneously resist the expansion of multiple battery cells 20.

[0123] In some examples, optionally, the battery cells 20 located at both ends of the second direction Y in each row of battery cells 20 abut against the two first side beams 12 respectively.

[0124] Each row of battery cells 20 located at both ends of the second direction Y is connected to its adjacent first side beam 12. The first side beam 12 is used to limit the large-area expansion of the battery cells 20, further reducing the possibility of expansion deformation of the battery cells 20.

[0125] Combined again with the appendix Figure 2-4 As shown, in some examples, optionally, the first limiting member 30 is respectively limited to the side of two adjacent rows of battery cells 20 away from the bottom wall 11 along the first direction X, the first direction X intersecting the second direction Y and the arrangement direction of the battery cells 20 to the bottom wall 11.

[0126] The first limiting member 30 is respectively limited and engaged with the side of the adjacent two rows of battery cells 20 away from the bottom wall 11. This means that the first limiting member 30 can be divided into two parts along the first direction X. One part of the first limiting member 30 is limited and engaged with the side of all battery cells 20 of one row of battery cells 20 away from the bottom wall 11 (the upper surface in the figure), and the other part of the first limiting member 30 is limited and engaged with the side of all battery cells 20 of another row of battery cells 20 away from the bottom wall 11 (the upper surface in the figure).

[0127] In this way, a first limiting member 30 can press down multiple battery cells 20 in two rows, and the first limiting member 30 can be used for multiple purposes, simplifying the structure.

[0128] In some embodiments, when the battery cells 20 are arranged in three or more rows along the first direction X in the figure, the number of first limiting members 30 is also two or more. Each row of battery cells 20 is limited in the third direction Z by one first limiting member 30 along one side of the first direction X, and each row of battery cells 20 is limited in the third direction Z by another first limiting member 30 along the other side of the first direction X. The third direction Z intersects the first direction X and the second direction Y respectively. The third direction Z is also the arrangement direction of the battery cells 20 to the bottom wall 11.

[0129] Taking the second row of battery cells 20 from left to right in the figure as an example, the upper surface of the left side of the battery cell 20 facing away from the bottom wall 11 is limited by a first limiting member 30, and the upper surface of the left side of the battery cell 20 facing away from the bottom wall 11 is limited by another first limiting member 30, thereby improving the positional stability of the battery cell 20 along the third direction Z.

[0130] Combined with appendix Figure 4 Appendix Figure 6-8 As shown, in some embodiments of this application, the battery device 100 further includes a second limiting member 40. Along the arrangement direction of the battery cell 20 to the bottom wall 11, one side of the opposite sides of the second limiting member 40 is connected to the bottom wall 11, and / or the other side of the opposite sides of the second limiting member 40 is connected to the first limiting member 30. The second limiting member 40 is used to limit the displacement of the battery cell 20 along the first direction X, which intersects the arrangement direction of the two first side beams 12 and the arrangement direction of the battery cell 20 to the bottom wall 11.

[0131] The second limiting member 40 is connected to the bottom wall 11 and the first limiting member 30 respectively. The second limiting member 40 and the first limiting member 30 together form a limiting beam structure. Since the expansion of the large surface of the battery cell 20 is limited by the two first side beams 12 and the first limiting member 30 in this embodiment, the second limiting member 40 can be distinguished from the expansion beam in the related technology by reducing its thickness along the first direction X, thereby increasing the accommodating space inside the battery box 10.

[0132] The second limiting member 40 has two main functions. One of them is to limit the displacement of the battery cell 20 along the first direction X. When the battery cell 20 is arranged in multiple rows along the first direction X, the number of second limiting members 40 can also be multiple. Each second limiting member 40 abuts or gaps with two rows of battery cells 20 on both sides along the first direction X.

[0133] Another function of the second limiting member 40 is to form a limiting beam together with the first limiting member 30. Unlike the expansion beam in related technologies, the second limiting member 40 is not a structure that bears the large-area expansion force of the battery cell 20. Therefore, its thickness along the first direction X can be made smaller, thereby optimizing the internal space of the box.

[0134] In this embodiment, the second limiting member 40 is used to connect the first limiting member 30 and the bottom wall 11 respectively, so that the bottom wall 11, the second limiting member 40, the first limiting member 30 and the two first side beams 12 together form a structure to resist the large-area expansion of the battery cell 20, thereby further improving the effect of the battery box 10 in resisting the expansion of the battery cell 20.

[0135] In some examples, optionally, along the second direction Y, the second limiting member 40 includes two opposite second ends 41, which abut or are clearance-fitted with the two first side beams 12, the second direction Y being the arrangement direction of the two first side beams 12.

[0136] In some embodiments, the length of the second limiting member 40 can be set along the second direction Y, and the second end 41 is the end in the length direction of the second limiting member 40.

[0137] The two second ends 41 abut against the two first side beams 12, so that the second limiting member 40, the two side walls and the bottom wall 11 form a relatively closed receiving groove for accommodating the battery cell 20, which can better limit and fix the battery cell 20. When there are multiple rows of battery cells 20, the second limiting member 40 can be used to completely isolate the two adjacent rows of battery cells 20, reducing the possibility of mutual interference between them.

[0138] Furthermore, by abutting or gap-fitting the two second ends 41 with the two first side beams 12, since the second ends 41 and the first side beams 12 do not have a direct mechanical connection such as welding or tenon joints, there is no need to reserve space for the assembly of the second ends 41 and the first side beams 12, thus further optimizing the internal space of the battery box 10.

[0139] In some examples, optionally, the side of the second limiting member 40 opposite to the bottom wall 11 is connected to the middle region of the first limiting member 30 along the first direction X.

[0140] The second limiting member 40 is connected to the first limiting member 30 in the middle area along the first direction X, such that part of the first limiting member 30 is located on one side of the second limiting member 40 along the first direction X, and the other part is located on the other side of the second limiting member 40 along the first direction X. This makes the cross-section of the limiting beam formed by the first limiting member 30 and the second limiting member 40 similar to a T-shape. The T-shaped limiting beam can limit the battery cell 20 along the third direction Z and the first direction X, respectively.

[0141] In some embodiments, the length direction of the second limiting member 40 can be set along the second direction Y, the thickness direction of the second limiting member 40 can be set along the first direction X, and the thickness direction of the first limiting member 30 is set along the third direction Z in the figure. Since the second limiting member 40 only plays a limiting role in the first direction X, its thickness can be made smaller.

[0142] In some examples, the second limiting member 40 may optionally be integrally formed with the bottom wall 11, and / or the second limiting member 40 may be integrally formed with the first limiting member 30.

[0143] The second limiting member 40 and the bottom wall 11 are integrally molded, meaning that the second limiting member 40 and the bottom wall 11 can be integrally molded by injection molding, extrusion, die casting, 3D printing, stamping, and hot pressing. Similarly, the second limiting member and the first limiting member 30 can also be combined into an integral molded part by the above methods.

[0144] The reason for adopting the above technical solution is that, when installing the limiting beam or expansion beam, the limiting beam or expansion beam is usually installed on the two first side beams 12 by welding or tenon joint.

[0145] Taking welding as an example, it is difficult to perform welding operations when the distance between the battery cell assembly and the weld is close, so the welding on the inside of the box must be cancelled, which reduces the effect of the expansion beam in resisting the expansion beam.

[0146] Taking the mortise and tenon joint as an example, the limiting beam or expansion beam needs to be mortised and tenoned to the two first side beams 12, which is difficult to assemble and reduces production efficiency.

[0147] In addition, whether it is welding or mortise and tenon joint, a certain amount of assembly space needs to be reserved in the battery box 10, which further reduces the volume utilization rate of the battery box 10.

[0148] Therefore, in this embodiment, the second limiting member 40 is directly connected to the bottom wall 11, and the two are designed as an integral part. This not only improves production efficiency, but also eliminates the need to connect the second limiting member 40 and the first side beam 12 through welding or tenon joints. Consequently, there is no need to reserve assembly space for the second limiting member 40 inside the battery box 10, thereby further optimizing the space inside the battery box 10 to arrange more battery cells 20 and further improving the energy density of the battery device 100.

[0149] Similarly, designing the second limiting member 40 and the first limiting member 30 as an integral part eliminates the need for welding or tenon joints to connect the second limiting member 40 and the first limiting member 30, which can also optimize the internal space of the battery box 10.

[0150] In some examples, the second limiting member 40 is optionally welded to the first limiting member 30.

[0151] The welding method between the second limiting member 40 and the first limiting member 30 can be laser welding, arc welding, gas welding, electric welding, etc., which will not be listed one by one in this embodiment.

[0152] Since the second limiting member 40 is connected to the first limiting member 30 on the side opposite to the bottom wall 11, the welding of the two will not occupy the internal space of the box and can improve the connection stability of the two.

[0153] Combined again with the appendix Figure 2-4 As shown, in some instances, the first limiting member 30 is optionally provided with at least one welding structure 33 for welding with the second limiting member 40, the welding structure 33 including a weld seam or a weld groove.

[0154] The first limiting member 30 and the second limiting member 40 can each be a plate-shaped part. The weld seam refers to the gap opened on the first limiting member 30. The weld seam can be used to facilitate the welding device to weld the first limiting member 30 and the second limiting member 40 together.

[0155] The welding groove refers to the groove opened on the surface of the first limiting member 30 away from the second limiting member 40. Taking advantage of the thin bottom wall 11 of the groove, the welding device can also easily weld the first limiting member 30 and the second limiting member 40 together.

[0156] In some embodiments, the number of welding structures 33 may be multiple, and the multiple welding structures 33 are arranged at intervals along the length direction of the first limit (the second direction Y in the figure).

[0157] Combined with appendix Figure 2-4 and appendix Figure 8 As shown, in some examples, optionally, the number of battery cells 20 is multiple, the multiple battery cells 20 include at least two rows along the first direction X, each row includes multiple battery cells 20 arranged sequentially along the second direction Y, the second direction Y is the arrangement direction of the two first side beams 12, and the second limiting member 40 is located between two adjacent rows of battery cells 20.

[0158] Each row of battery cells 20 includes multiple battery cells 20 arranged at uniform intervals in the second direction Y. The multiple battery cells 20 can form the battery cell assembly described above. The battery cell assembly as a whole abuts against the two first side beams 12.

[0159] The second limiting member 40 can abut against each of the two adjacent rows of battery cells 20 in the first direction X, so that one second limiting member 40 can simultaneously limit and fix the two rows of battery cells 20.

[0160] Combined with appendix Figure 2-4 and appendix Figure 6 and 7 As shown, in some examples, optionally, the first side beam 12 is provided with a mounting structure 121 for connecting electrical equipment on the side opposite to the battery cell 20.

[0161] The mounting structure 121 may include a mounting member 1211, which is a plate-shaped or block-shaped member. The mounting member is provided with mounting holes 1212, and electrical equipment (such as vehicle body) is connected through the mounting member 1211.

[0162] In addition to connecting electrical equipment, the mounting component 1211 can also enhance the structural strength of the first side beam 12.

[0163] Unlike related technologies where the expansion beam is connected to the side wall of the battery cell 20 without a mounting structure 121, this embodiment designs the limiting beam composed of the first limiting member 30 and the second limiting member 40 to be connected to the first side beam 12 with the mounting structure 121. This makes the structure composed of the bottom wall 11, the first limiting member 30, the second limiting member 40 and the two first side beams 12, which resists the expansion of the battery cell 20, have better strength and stability, and further improves the ability of the battery box 10 to resist the expansion of the battery cell 20.

[0164] In some examples, optionally, there are multiple mounting structures 121, which are arranged along a first direction X on the first side beam 12. The first direction X intersects the arrangement directions of the two first side beams 12 and the arrangement direction of the battery cells 20 to the bottom wall 11.

[0165] The shape and size of each mounting structure 121 may be different. For example, the mounting member 1211 of the middle mounting structure 121 in the figure has a larger size along the first direction X and may have multiple mounting holes 1212, while the mounting members 1211 on both sides have a smaller size along the first direction X and only one mounting hole 1212.

[0166] The mounting structure 121 is designed to be multiple and arranged along the first direction X, which not only facilitates docking with electrical equipment such as the vehicle 1000, but also further increases the structural strength of the first side beam 12.

[0167] Combined again with the appendix Figure 8 As shown, in some examples, optionally, the side of the battery cell 20 facing the bottom wall 11 is provided with an adhesive (not shown in the figure), and the battery cell 20 is connected to the bottom wall 11 through the adhesive.

[0168] The colloid is applied to the bottom surface of the battery cell 20 before the battery cell 20 is installed onto the bottom wall 11. The colloid can be a structural adhesive.

[0169] The reason for setting the colloid is that although the lower surface of the battery cell 20 is limited by the bottom wall 11, the upper surface is limited by the first limiting member 30, and the two sides along the first direction X are limited by the second limiting member 40, it is necessary to ensure the expansion gap between two adjacent battery cells 20.

[0170] Therefore, in this embodiment, the bottom surface of the battery cell 20 is coated with adhesive to connect to the bottom wall 11, which can improve the stability of the battery cell 20 placed on the bottom wall 11, thereby keeping the distance between two adjacent battery cells 20 fixed.

[0171] Combined with appendix Figure 6 and 7 As shown, in some examples, optionally, the first side beam 12 is provided with a cavity 122 and a reinforcing rib 123 located in the cavity 122. The cavity 122 is provided with two first inner wall surfaces 1221 opposite to each other along the second direction Y. The reinforcing rib 123 is connected to the two first inner wall surfaces 1221 respectively. The second direction Y is the arrangement direction of the two first side beams 12.

[0172] The length of the cavity 122 can be set along the first direction X in the figure. The cavity 122 has two first inner wall surfaces 1221 that are opposite each other along the second direction Y. The presence of the cavity 122 can reduce the weight of the first side beam 12 and achieve the purpose of weight reduction.

[0173] There are various structural forms of the reinforcing ribs 123. For example, there are multiple reinforcing ribs 123 in the figure. Multiple reinforcing ribs 123 are arranged in a crisscross pattern to form a grid-like reinforcing structure, thereby improving the structural strength of the first side beam 12 in the second direction Y and reducing the possibility of deformation of the first side beam 12 under the expansion of the battery cell 20.

[0174] Combined again with the appendix Figure 8 As shown, in some examples, the bottom wall 11 is optionally provided with a cooling medium flow channel 111.

[0175] The cooling medium flow channel 111 can be filled with cooling medium, which can be water or other coolant. The cooling medium can flow and circulate in a predetermined direction within the cooling medium flow channel 111.

[0176] By utilizing the circulation of the cooling medium within the cooling medium flow channel 111 to exchange heat with the battery cell 20, the battery cell 20 can be cooled, reducing the possibility of thermal runaway caused by excessively high temperature of the battery cell 20.

[0177] In some examples, the battery device 100 is optionally installed on the vehicle 1000 and provides or stores electrical energy to the vehicle 1000, with the two first side beams 12 aligned with the wheel axis of the vehicle 1000.

[0178] The arrangement direction of the two first side beams 12 is consistent with the wheel axis of the vehicle 1000, that is, the first side beams 12 are the side beams on the left and right sides of the battery device 100 installed on the vehicle 1000.

[0179] Finally, please see the appendix. Figure 2-8As shown, this application embodiment provides a battery device 100, including a battery housing 10, battery cells 20, and a first limiting member 30. The battery housing 10 includes a bottom wall 11 and two first side beams 12, which are respectively connected to the bottom wall 11 and are arranged opposite to each other. At least one battery cell 20 is installed on the bottom wall 11 and located between the two first side beams 12. The battery cell 20 has two opposite first surfaces 21, which are the surfaces with the largest area of ​​the battery cell 20. The arrangement direction of the two first surfaces 21 is consistent with the arrangement direction of the two first side beams 12. The first limiting member 30 is located on the side of the battery cell 20 away from the bottom wall 11 and is respectively connected to the two first side beams 12. The first limiting member 30 is in a limiting cooperation with the side of the battery cell 20 away from the bottom wall 11. The first limiting member 30 has two opposite first ends 31, which are installed one-to-one on the side of the two first side beams 12 away from the bottom wall 11. The first end 31 is provided with at least one first connecting structure, and the first side beam 12 is provided with at least one second connecting structure on the side facing away from the bottom wall 11. The first connecting structure and the second connecting structure are connected by a first connecting member 32. The first connecting structure includes a first connecting hole, and the second connecting structure includes a second connecting hole. The first connecting member 32 passes through and connects to the first connecting hole and the second connecting hole to mate with the first end 31 and the first side beam 12. There are multiple battery cells 20, and the multiple battery cells 20 are arranged in at least multiple rows. Each row of battery cells 20 includes multiple battery cells 20 arranged along a second direction Y, which is the arrangement direction of the two first side beams 12. The battery cells 20 located at both ends of the second direction Y in each row of battery cells 20 abut against the two first side beams 12 respectively. The first limiting member 30 respectively limits and cooperates with the side of the adjacent two rows of battery cells 20 facing away from the bottom wall 11 along the first direction X, which intersects the second direction Y and the arrangement direction of the battery cells 20 to the bottom wall 11 respectively. The battery device 100 further includes a second limiting member 40. Along the arrangement direction of the battery cells 20 to the bottom wall 11, one side of the second limiting member 40 is connected to the bottom wall 11, and / or the other side of the second limiting member 40 is connected to the first limiting member 30. The second limiting member 40 is used to limit the displacement of the battery cells 20 along a first direction X, which intersects the arrangement direction of the two first side beams 12 and the arrangement direction of the battery cells 20 to the bottom wall 11. Along a second direction Y, the second limiting member 40 includes two opposite second ends 41, which abut or are clearance-fitted with the two first side beams 12. The second direction Y is the arrangement direction of the two first side beams 12. The side of the second limiting member 40 facing away from the bottom wall 11 is connected to the middle region of the first limiting member 30 along the first direction X. The second limiting member 40 and the bottom wall 11 are integrally formed, and / or the second limiting member 40 and the first limiting member 30 are integrally formed. The second limiting member 40 and the first limiting member 30 are assembled into a single structure.The first limiting member 30 is provided with at least one welding structure 33 for welding with the second limiting member 40. The welding structure 33 includes a weld seam or a weld groove. There are multiple battery cells 20, comprising at least two rows along a first direction X. Each row includes multiple battery cells 20 arranged sequentially along a second direction Y, which is the arrangement direction of the two first side beams 12. The second limiting member 40 is located between two adjacent rows of battery cells 20. A mounting structure 121 for connecting electrical equipment is provided on the side of the first side beam 12 facing away from the battery cells 20. There are multiple mounting structures 121, arranged along the first direction X on the first side beam 12. The first direction X intersects the arrangement direction of the two first side beams 12 and the arrangement direction of the battery cells 20 to the bottom wall 11. An adhesive is provided on the side of the battery cell 20 facing the bottom wall 11, and the battery cell 20 is connected to the bottom wall 11 through the adhesive. The first side beam 12 has a cavity 122 and reinforcing ribs 123 located within the cavity 122. The cavity 122 has two first inner wall surfaces 1221 facing each other along a second direction Y. The reinforcing ribs 123 are respectively connected to the two first inner wall surfaces 1221. The second direction Y is the arrangement direction of the two first side beams 12. The bottom wall 11 has cooling medium channels 111. The battery device 100 is used to install on the vehicle 1000 and to provide electrical energy or store electrical energy for the vehicle 1000. The arrangement direction of the two first side beams 12 is consistent with the wheel axis of the vehicle 1000.

[0180] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0181] Combined again with the appendix Figure 1 As shown, based on the battery device 100 described above, this application embodiment also provides an electrical device, including the battery device 100 described above. The battery device 100 is used to provide electrical energy to the electrical device, which may be a vehicle 1000.

[0182] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for the intermediate technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A battery device, characterized in that, include: The battery housing includes a bottom wall and two first side beams, the two first side beams being connected to the bottom wall respectively, and the two first side beams being arranged opposite to each other; At least one battery cell is mounted on the bottom wall and located between the two first side beams. The battery cell has two opposite first surfaces, the first surface being the surface with the largest area of ​​the battery cell. The arrangement direction of the two first surfaces is consistent with the arrangement direction of the two first side beams. as well as The first limiting member is located on the side of the battery cell away from the bottom wall and is connected to the two first side beams respectively. The first limiting member is in a limiting engagement with the side of the battery cell away from the bottom wall.

2. The battery device according to claim 1, characterized in that, The first limiting member includes two opposite first ends, which are installed one-to-one on the side of the two first side beams away from the bottom wall.

3. The battery device according to claim 2, characterized in that, The first end is provided with at least one first connecting structure, and the side of the first side beam away from the bottom wall is provided with at least one second connecting structure. The first connecting structure and the second connecting structure are connected by a first connector.

4. The battery device according to claim 3, characterized in that, The first connecting structure includes a first connecting hole, the second connecting structure includes a second connecting hole, and the first connector passes through and connects to the first connecting hole and the second connecting hole to mate with the first end and the first side beam.

5. The battery device according to claim 1, characterized in that, The number of battery cells is multiple, and the multiple battery cells are arranged in at least multiple rows. Each row of battery cells includes multiple battery cells arranged along a second direction, which is the arrangement direction of the two first side beams.

6. The battery device according to claim 5, characterized in that, The battery cells located at both ends of the second direction in each row abut against the two first side beams respectively.

7. The battery device according to claim 5, characterized in that, The first limiting member is respectively limited and engaged with the side of the two adjacent rows of battery cells away from the bottom wall along the first direction, and the first direction intersects the second direction and the arrangement direction of the battery cells to the bottom wall.

8. The battery device according to any one of claims 1-7, characterized in that, The battery device further includes a second limiting member. Along the arrangement direction of the battery cells to the bottom wall, one side of the opposite sides of the second limiting member is connected to the bottom wall, and / or the other side of the opposite sides of the second limiting member is connected to the first limiting member. The second limiting member is used to limit the displacement of the battery cells along a first direction, which intersects the arrangement direction of the two first side beams and the arrangement direction of the battery cells to the bottom wall.

9. The battery device according to claim 8, characterized in that, Along the second direction, the second limiting member includes two opposite second ends, which abut or are clearance-fitted with the two first side beams, and the second direction is the arrangement direction of the two first side beams.

10. The battery device according to claim 8, characterized in that, The side of the second limiting member opposite to the bottom wall is connected to the middle area of ​​the first limiting member along the first direction.

11. The battery device according to claim 8, characterized in that, The second limiting member and the bottom wall are integrally formed, and / or the second limiting member and the first limiting member are integrally formed.

12. The battery device according to claim 8, characterized in that, The second limiting member and the first limiting member are assembled into a single structure.

13. The battery device according to claim 12, characterized in that, The first limiting member is provided with at least one welding structure for welding with the second limiting member, the welding structure including a weld seam or a weld groove.

14. The battery device according to claim 8, characterized in that, The number of battery cells is multiple, and the multiple battery cells include at least two rows along the first direction. Each row includes multiple battery cells arranged sequentially along the second direction, which is the arrangement direction of the two first side beams. The second limiting member is located between two adjacent rows of battery cells.

15. The battery device according to any one of claims 1-7, characterized in that, The side of the first side beam opposite to the battery cell is provided with a mounting structure for connecting electrical equipment.

16. The battery device according to any one of claims 1-7, characterized in that, The battery cell has an adhesive layer on the side facing the bottom wall, and the battery cell is connected to the bottom wall through the adhesive layer.

17. The battery device according to any one of claims 1-7, characterized in that, The first side beam has a cavity and a reinforcing rib located inside the cavity. The cavity has two first inner wall surfaces that are opposite each other along a second direction. The reinforcing ribs are respectively connected to the two first inner wall surfaces. The second direction is the arrangement direction of the two first side beams.

18. The battery device according to any one of claims 1-7, characterized in that, The bottom wall is provided with cooling medium flow channels.

19. The battery device according to any one of claims 1-7, characterized in that, The battery device is used to install in the vehicle and to provide or store electrical energy for the vehicle. The arrangement direction of the two first side beams is consistent with the wheel axis of the vehicle.

20. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-19, the battery device being used to provide electrical energy or store electrical energy.

Images