Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and relates to the technical field of batteries. The battery monomer assembly is arranged in the box body; the limiting structure is arranged between the side wall of the box body and the battery monomer assembly and abuts against the side wall of the box body and the battery monomer assembly, the limiting structure comprises a first plate body and a second plate body, and the first plate body is located on the side, facing the battery monomer assembly or facing the side wall of the box body, of the second plate body; the side, facing the second plate body, of the first plate body is provided with a first slope, the side, facing the first plate body, of the second plate body is provided with a second slope, and the first slope and the second slope are attached and form an angle with the depth direction of the box body. The limiting structure can improve the structural rigidity of the battery device and improve the vibration impact and side column collision performance of the battery device. In addition, the limiting structure is convenient to assemble between the battery monomer assembly and the side wall of the box body while the battery monomer assembly is convenient to assemble to the box body.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device and an electric device. Background Art

[0002] In the related art, there is a gap between the battery cell assembly and the side wall of the battery pack. The gap is used to facilitate the assembly of the battery cell assembly into the box. However, there is a gap between the battery cell assembly and the side wall of the box. When the battery pack is subjected to an impact load, there is no limit between the battery cell assembly and the side wall of the box, causing the battery cell assembly to shift to one side of the gap, resulting in debonding at the bottom of the battery cell assembly, and in severe cases, causing the battery pack to fail. If there is no gap between the battery cell assembly and the box, the battery cell assembly will not be able to be installed in the battery pack. In the prior art, structural adhesive is generally used to fill the sides of the battery cell assembly. After the structural adhesive is cured, the cured shape of the structural adhesive cannot be controlled. When the side column of the entire vehicle hits, the structural adhesive will squeeze the battery cell assembly, causing the battery cell assembly to fail. Utility Model Content

[0003] In view of the above problems, the present invention provides a battery device, which can improve the structural rigidity of the battery device through a limiting structure, improve the vibration impact and side column collision performance of the battery device, and the limiting structure is easy to assemble between the battery cell assembly and the side wall of the box, and has little difficulty in industrialization.

[0004] In a first aspect, the present invention provides a battery device comprising: a box body; a battery cell assembly, wherein the battery cell assembly is arranged in the box body; a limiting structure, wherein the limiting structure is arranged between the side wall of the box body and the battery cell assembly and abuts against the side wall of the box body and the battery cell assembly, the limiting structure comprising a first plate body and a second plate body, the first plate body being located on a side of the second plate body facing the battery cell assembly or the side wall of the box body, the first plate body having a first inclined surface on a side facing the second plate body, the second plate body having a second inclined surface on a side facing the first plate body, the first inclined surface and the second inclined surface being in contact with each other and forming an angle with respect to the depth direction of the box body.

[0005] In the above-mentioned technical solution, by providing a limiting structure between the battery cell assembly of the battery device and the side wall of the housing, the limiting structure supports the side of the battery cell assembly, thereby increasing the limiting distance between the battery cell assembly and the housing, thereby enhancing the structural rigidity of the battery device and improving the vibration, impact, and side column impact resistance of the battery device. In addition, the limiting structure includes a first plate and a second plate arranged between the battery cell assembly and the side wall of the housing, with the first plate having a first inclined surface on the side facing the second plate, and the second plate having a second inclined surface on the side facing the first plate. The first and second inclined surfaces are aligned and angled relative to the depth direction of the housing, facilitating the assembly of the battery cell assembly into the housing while facilitating the assembly of the limiting structure between the battery cell assembly and the side wall of the housing. This reduces the difficulty of industrialization and improves the feasibility of the process.

[0006] In some embodiments, the first plate and the second plate are connected and fixed by a snap-fit structure.

[0007] In the above technical solution, the buckle structure can improve the reliability of the connection between the first plate and the second plate, and improve the problem of one of the first plate and the second plate falling out from between the battery cell assembly and the side wall of the box.

[0008] In some embodiments, the snap-fit structure includes a first protrusion and a first groove, wherein the first protrusion is provided on one of the first inclined surface and the second inclined surface, and the first groove is provided on the other of the first inclined surface and the second inclined surface.

[0009] In the above technical solution, by providing a first groove on one of the first and second inclined surfaces and a first protrusion on the other of the first and second inclined surfaces that mates with the first groove, a relatively fixed hybrid connection between the first and second plates can be achieved, thereby alleviating the problem of one of the first and second plates being dislodged from between the battery cell assembly and the side wall of the casing. Furthermore, the simple snap-fit structure simplifies the structure and processing of the first and second plates, thereby improving production efficiency.

[0010] In some embodiments, at least one of the first plate and the second plate has a cavity therein.

[0011] In the above technical solution, by setting a cavity structure in at least one of the first plate body and the second plate body, the deformation ability of the first plate body or the second plate body can be improved, and when the limiting structure is assembled to the gap between the battery cell assembly and the side wall of the box body, the assembly of the limiting structure is facilitated, and the side column collision performance of the battery device is improved.

[0012] In some embodiments, in a cross section perpendicular to the length direction of the first plate body or the second plate body, the shape of the cavity is circular, elliptical or polygonal.

[0013] In the above technical solution, by making the cross-section of the cavity circular, elliptical or polygonal, the diversity of the cavity shape can be increased, so that the cavity is more consistent with the structure of the first plate body or the second plate body, and the internal structural layout of the first plate body and the second plate body can be made more compact and reasonable.

[0014] In some embodiments, a foam layer is provided on a side of the first plate body facing away from the second plate body and / or a side of the second plate body facing away from the first plate body.

[0015] In the above technical solution, a foam layer is provided on the side of the first plate body facing away from the second plate body and / or on the side of the second plate body facing away from the first plate body, so that the gap between the limiting structure and the battery cell assembly or the limiting structure and the box body can be filled, so that the limiting structure can be tightly connected with the battery cell assembly and the side wall of the box body, and at the same time can protect the battery cell assembly or the components arranged on the inner wall of the box body.

[0016] In some embodiments, the two ends of the limiting structure along the depth direction of the box body are respectively a first end and a second end, the first end is arranged close to the bottom wall of the box body relative to the second end, a second protrusion is provided on the side of the first plate body facing away from the second plate body, and a foam layer is provided on the side of the first plate body facing away from the second plate body, the second protrusion is located on the side of the foam layer close to the first end and is spaced apart from the first end, and the foam layer abuts against the side wall of the box body or the battery cell assembly.

[0017] In the above technical solution, a second protrusion is provided on the side of the first plate body facing away from the second plate body, the second protrusion is located on the side of the foam layer near the first end and spaced apart from the first end, and a foam layer is provided on the side of the first plate body facing away from the second plate body, with the surface of the foam layer facing away from the first plate body extending beyond the second protrusion in an uncompressed state. This allows the first protrusion and the first plate body to form a groove structure to accommodate overflow glue, facilitates the connection between the limiting structure and the box body, and further improves the fixation of the foam layer and the limiting structure's ability to better limit the battery cell assembly and the box body assembly.

[0018] In some embodiments, the second protrusion extends along the length direction of the first plate body.

[0019] In the above technical solution, the volume of the groove structure for accommodating overflowing glue can be increased, and the supporting effect on the foam layer can be improved at the same time.

[0020] In some embodiments, the first plate is located on a side of the second plate away from the battery cell assembly, and along the depth direction of the box and in the direction toward the bottom wall of the box, the first inclined surface is inclined toward the second plate.

[0021] In the above technical solution, by making the first inclined surface tilt toward the second plate along the depth direction of the box body and in the direction toward the bottom wall of the box body, the assembly of the limiting structure is facilitated and the components located on the inner wall of the box body can be protected.

[0022] In some embodiments, a side of the second plate body facing away from the first plate body has a second plane, and the second plane is perpendicular to the arrangement direction of the first plate body and the second plate body.

[0023] In the above technical solution, by setting a second plane perpendicular to the arrangement direction of the first and second plates on the side of the second plate away from the first plate, the contact area between the battery cell assembly in contact with the side of the second plate away from the first plate and the first plate can be increased, and the limit between the battery cell assembly and the side wall of the box body can be increased, which can enhance the structural rigidity of the battery device and improve the vibration impact and side column collision performance of the battery device.

[0024] In some embodiments, a side of the first plate body facing away from the second plate body has a first plane, and the first plane intersects with an arrangement direction of the first plate body and the second plate body.

[0025] In the above technical solution, by setting a plane perpendicular to the arrangement direction of the first plate and the second plate on the side of the first plate facing away from the second plate, the contact area between the side wall of the box body that contacts the side of the first plate body facing away from the second plate body and the first plate body can be increased, and the limit between the battery cell assembly and the side wall of the box body can be increased, which can enhance the structural rigidity of the battery device and improve the vibration impact and side column collision performance of the battery device.

[0026] In some embodiments, the two ends of the limiting structure along the depth direction of the box body are respectively a first end and a second end, the first end is arranged close to the bottom wall of the box body relative to the second end, and a second groove is provided on the side of the second plate body facing away from the first plate body, and the second groove extends to the first end and is open on the side facing away from the first plate body.

[0027] In the above technical solution, by providing a second groove on the side of the second plate away from the first plate, and the side of the second groove close to the first end is open, overflow glue can be contained and the connection between the limiting structure and the box body is facilitated.

[0028] In some embodiments, the two ends of the limiting structure along the depth direction of the box body are respectively a first end and a second end, the first end is arranged close to the bottom wall of the box body relative to the second end, and a third groove is provided on at least one of the end surfaces of the first plate body and the second plate body close to the first end.

[0029] In the above technical solution, by providing a third groove on at least one of the end faces of the first plate and the second plate close to the first end, it can be used to accommodate glue overflow between the battery cell assembly and the bottom wall of the box, and facilitate the connection between the limiting structure and the box.

[0030] In some embodiments, the third groove extends along the length direction of the first plate body or the second plate body; and / or, the third groove is a plurality of grooves spaced apart along the arrangement direction of the first plate body and the second plate body.

[0031] In the above technical solution, by extending the third groove along the length direction of the first plate body or the second plate body or making the third grooves a plurality of grooves spaced apart along the arrangement direction of the first plate body and the second plate body, the limiting structure can accommodate more overflow glue and at the same time improve the reliability of the connection between the limiting structure and the bottom wall of the box body.

[0032] In some embodiments, there are two first plates, and the two first plates are respectively located on a side of the second plate facing the battery cell assembly and a side facing the side wall of the box.

[0033] In the above technical solution, by providing two first plates and a second plate located between the two first plates, the flexibility of the limiting structure can be improved while facilitating the assembly of the limiting structure.

[0034] In some embodiments, the two ends of the limiting structure along the depth direction of the box body are respectively a first end and a second end, the first end is arranged close to the bottom wall of the box body relative to the second end, and in the direction from the first end to the second end, the two second inclined surfaces are inclined in a direction away from each other.

[0035] In the above technical solution, by making the two second inclined surfaces tilt away from each other in the direction from the first end to the second end, the assembly of the limiting structure is facilitated while protecting the battery cell assembly and the components arranged on the side walls of the box, making the structure of the battery device safer and more reliable.

[0036] In a second aspect, the present invention provides an electrical device, comprising: the above-mentioned battery device.

[0037] In the above technical solution, a limiting structure is provided between the battery cell assembly of the battery device and the side wall of the housing. The limiting structure supports the side of the battery cell assembly, thereby increasing the limit between the battery cell assembly and the housing, thereby enhancing the structural rigidity of the battery device and improving the vibration, impact, and side column impact resistance of the battery device. In addition, the limiting structure includes a first plate and a second plate arranged between the battery cell assembly and the side wall of the housing, with the first plate having a first inclined surface on the side facing the second plate, and the second plate having a second inclined surface on the side facing the first plate. The first and second inclined surfaces are aligned and angled relative to the depth direction of the housing, facilitating the assembly of the battery cell assembly into the housing while facilitating the assembly of the limiting structure between the battery cell assembly and the side wall of the housing. This reduces the difficulty of industrialization and improves the feasibility of the process.

[0038] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0040] Figure 1 is a partial structural diagram of a battery device according to an embodiment of the present utility model;

[0041] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0042] Figure 3 is an exploded view of a portion of the structure of a battery device according to an embodiment of the present utility model;

[0043] Figure 4 is a three-dimensional diagram of a limiting structure of a battery device according to an embodiment of the present utility model;

[0044] Figure 5 is a side view of the limiting structure of the battery device according to an embodiment of the present utility model;

[0045] Figure 6 is a perspective view of a limiting structure of a battery device according to other embodiments of the present invention;

[0046] Figure 7 is a side view of a limiting structure of a battery device according to other embodiments of the present invention;

[0047] Figure 8 Schematic diagram of an electrical device according to an embodiment of the present invention.

[0048] Reference numerals:

[0049] 1000. Electrical devices;

[0050] 100. Battery device;

[0051] 10. Limiting structure; 10a. First end; 10b. Second end;

[0052] 1. First plate; 11. First inclined surface; 12. First plane; 13. Second protrusion; 14. Third groove;

[0053] 2. Second plate; 21. Second inclined surface; 22. Cavity; 23. Second plane; 24. Second groove;

[0054] 3. Buckle structure; 31. First protrusion; 32. First groove;

[0055] 4. Foam layer;

[0056] 20. Box body;

[0057] 30. Battery monomer assembly;

[0058] 200. Car body. DETAILED DESCRIPTION

[0059] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0060] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meanings as those commonly understood by those skilled in the art to which this utility model belongs. The terms used in the specification of the application of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The terms "including" and "having" and any variations thereof in the specification and claims of this utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this utility model or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0061] Reference to an "embodiment" in this disclosure means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0062] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0063] In this application, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0064] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of the present invention, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are for illustrative purposes only and do not constitute any limitation on the present invention.

[0065] The term “plurality” used in this invention refers to two or more (including two).

[0066] In the embodiments of the present invention, unless otherwise specified, all embodiments and optional embodiments of the present invention can be combined with each other to form a new technical solution.

[0067] In the embodiments of the present invention, unless otherwise specified, all technical features and optional technical features of the present invention can be combined with each other to form a new technical solution.

[0068] In embodiments of the present invention, a battery apparatus may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or parallel via a busbar. For example, a battery cell assembly is typically formed by arranging multiple battery cells; a 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.

[0069] The battery device may be a battery pack, which includes a housing and one or more battery cell assemblies housed within the housing. The battery cell assemblies may be battery modules, which may be housed within the housing by securing the battery module within the housing. Alternatively, the battery cell assembly may be housed within the housing by directly securing multiple battery cells to the housing.

[0070] In an embodiment of the present invention, 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 accommodate the battery cell assembly. Enclosed herein means covered or closed, and may be sealed or unsealed. The first housing may be a top cover or a bottom plate. For example, the housing may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame to form an enclosed space within the housing to accommodate the battery cell assembly.

[0071] In an embodiment of the present invention, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0072] In the embodiments of the present invention, the battery cells may be secondary batteries, which are batteries that can be recharged to activate the active materials after discharge and continue to be used. The battery cells may be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., and the embodiments of the present invention are not limited to this. The battery cells may be cylindrical, flat, rectangular, or other shapes, and the embodiments of the present invention are not limited to this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of the present invention are not limited to this.

[0073] Currently, market developments indicate that batteries are increasingly being used. They 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 aerospace and other fields. As the application of power batteries continues to expand, market demand is also growing.

[0074] In the related art, there is a gap between the battery cell assembly and the side wall of the battery pack. The gap is used to facilitate the assembly of the battery cell assembly into the box. However, there is a gap between the battery cell assembly and the side wall of the box. When the battery pack is subjected to an impact load, there is no limit between the battery cell assembly and the side wall of the box, causing the battery cell assembly to shift to one side of the gap, resulting in debonding at the bottom of the battery cell assembly, and in severe cases, causing the battery pack to fail. If there is no gap between the battery cell assembly and the box, the battery cell assembly will not be able to be installed in the battery pack. In the prior art, structural adhesive is generally used to fill the sides of the battery cell assembly. After the structural adhesive is cured, the cured shape of the structural adhesive cannot be controlled. When the side column of the entire vehicle hits, the structural adhesive will squeeze the battery cell assembly, causing the battery cell assembly to fail.

[0075] Based on this, the utility model proposes a battery device, including: a box body; a battery cell assembly, the battery cell assembly is arranged in the box body; a limiting structure, the limiting structure is arranged between the side wall of the box body and the battery cell assembly and abuts against the side wall of the box body and the battery cell assembly, the limiting structure includes a first plate body and a second plate body, the first plate body is located on the side of the second plate body facing the battery cell assembly or the side wall of the box body, the first plate body has a first inclined surface on the side facing the second plate body, and the second plate body has a second inclined surface on the side facing the first plate body, the first inclined surface and the second inclined surface are in contact with each other and form angles with the depth direction of the box body.

[0076] In the aforementioned limiting structure, by providing a limiting structure between the battery cell assembly and the side wall of the housing, the limiting structure supports the side of the battery cell assembly, thereby increasing the limiting distance between the battery cell assembly and the housing, thereby enhancing the structural rigidity of the battery device and improving the vibration, impact, and side column impact resistance of the battery device. Furthermore, the limiting structure includes a first plate and a second plate arranged between the battery cell assembly and the side wall of the housing, wherein the first plate has a first inclined surface on the side facing the second plate, and the second plate has a second inclined surface on the side facing the first plate. The first and second inclined surfaces fit together and form an angle with respect to the depth direction of the housing, facilitating the simultaneous assembly of the battery cell assembly into the housing and the assembly of the limiting structure between the battery cell assembly and the side wall of the housing. This reduces the difficulty of industrialization and improves the feasibility of the process.

[0077] The battery device disclosed in the embodiments of the present invention can be used in electrical equipment that uses the battery device as a power source or various energy storage systems that use the battery device as an energy storage element. In addition to being used in vehicles, the battery device can also be used in, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery cars, electric cars, ships, spacecraft, and the like. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0078] The power-consuming device disclosed in the embodiments of the present invention may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device is provided inside the vehicle, and the battery device may be provided at the bottom, head or tail of the vehicle. The battery device may be used to power the vehicle, for example, the battery device may serve as an operating power source for the vehicle. The vehicle may further include a controller and a motor, and the controller is used to control the battery device to power the motor, for example, for the starting, navigation and working power requirements of the vehicle during driving. In some embodiments of the present invention, the battery device may serve not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0079] Reference below Figure 1-Figure 7 A battery device 100 according to an embodiment of the present invention is described.

[0080] refer to Figure 1-Figure 3 In a first aspect, the present invention provides a battery device 100, which includes a box body 20, a battery cell assembly 30, and a limiting structure 10. The battery cell assembly 30 is disposed in the box body 20, and the limiting structure 10 is disposed between the side wall of the box body 20 and the battery cell assembly 30 and abuts against the side wall of the box body 20 and the battery cell assembly 30. Figure 4 and Figure 5 The limiting structure 10 includes: a first plate 1 and a second plate 2, the first plate 1 is located on the side of the second plate 2 facing the battery cell assembly 30 or the side wall of the box body 20, the first plate 1 has a first inclined surface 11 on the side facing the second plate 2, and the second plate 2 has a second inclined surface 21 on the side facing the first plate 1, the first inclined surface 11 and the second inclined surface 21 are in contact with each other and form an angle with the depth direction of the box body 20.

[0081] The limiting structure 10 is disposed between the sidewalls of the housing 20 of the battery device 100 and the battery cell assembly 30, that is, a gap is provided between the battery cell assembly 30 and the sidewalls of the housing 20. During assembly, the battery cell assembly 30 can be first assembled into the housing 20, and then the limiting structure 10 can be disposed within the gap between the battery cell assembly 30 and the sidewalls of the housing 20. On the one hand, the gap between the battery cell assembly 30 and the sidewalls of the housing 20 facilitates the proper assembly of the battery cell assembly 30 into the housing 20. On the other hand, the positioning of the limiting structure 10 between the battery cell assembly 30 and the sidewalls of the housing 20 of the battery device 100 increases the spacing between the battery cell assembly 30 and the housing 20. This can alleviate the problem of the battery cell assembly 30 deviating toward the side of the gap due to the lack of side restraint, leading to debonding at the bottom of the battery cell assembly 30, when the battery device 100 is subjected to an impact load, thereby reducing the risk of battery device 100 failure. In addition, the structural rigidity of the battery device 100 can be increased, and the vibration, shock, and side pole collision resistance of the battery device 100 can be improved.

[0082] refer to Figure 4 and Figure 5 As shown, the limiting structure 10 includes a first plate 1 and a second plate 2. The first plate 1 is located on the side of the second plate 2 facing the battery cell assembly 30 or the side wall of the box 20. The first plate 1 has a first inclined surface 11 on the side facing the second plate 2, and the second plate 2 has a second inclined surface 21 on the side facing the first plate 1. The first inclined surface 11 and the second inclined surface 21 are in contact with each other and are aligned with the depth direction of the box 20 (such as Figure 2 and the second direction shown) are at an angle to each other.

[0083] Among them, such as Figure 5 As shown, the first plate 1 and the second plate 2 are arranged along a first direction, which is the direction from the side walls of the box 20 on both sides of the limiting structure 10 to the battery cell assembly 30 or from the battery cell assembly 30 to the side walls of the box 20.

[0084] It can be understood that, along the depth direction (second direction) of the box body 20, in the direction from the open side of the upper end of the box body 20 to the bottom wall of the box body 20, the first inclined surface 11 can be inclined toward the second plate body 2, and the second inclined surface 21 can be inclined in the direction away from the first plate body 1, or the first inclined surface 11 can be inclined in the direction away from the second plate body 2, and the second inclined surface 21 can be inclined toward the first plate body 1.

[0085] For example, in Figure 4 and Figure 5In the illustrated example, along the depth direction (second direction) of the housing 20, from the open upper end of the housing 20 to the bottom wall of the housing 20, the first inclined surface 11 can be inclined toward the second plate 2, and the second inclined surface 21 can be inclined away from the first plate 1. The first plate 1 and the second plate 2 are joined together by the first inclined surface 11 and the second inclined surface 21. When assembling the retaining structure 10, the first plate 1 can be first assembled to a predetermined position between the battery cell assembly 30 and the side wall of the housing 20. Then, the second plate 2 can be assembled on one side of the first inclined surface 11 and pressed downwardly. Due to the interaction between the first inclined surface 11 and the second inclined surface 21, the second plate 2 presses the first plate 1 to one side along the first inclined surface 11 until the second plate 2 is installed between the battery cell assembly 30 and the side wall of the housing 20. At this point, the retaining structure 10 abuts against the battery cell assembly 30 and the side wall of the housing 20, further limiting the position between the battery cell assembly 30 and the side wall of the housing 20.

[0086] Of course, along the depth direction of the box body 20 (the second direction), in the direction from the open side of the upper end of the box body 20 to the bottom wall of the box body 20, the first inclined surface 11 is inclined in the direction away from the second plate body 2. When the second inclined surface 21 is inclined toward the first plate body 1, the second plate body 2 needs to be assembled first, and then the first plate body 1 is assembled.

[0087] The coordination of the first and second inclined surfaces 11 and 21 facilitates the integral assembly of the retaining structure 10 between the battery cell assembly 30 and the sidewall of the battery device 100 housing 20. This facilitates the insertion of the battery cell assembly 30 into the housing while increasing process feasibility. Furthermore, the retaining structure 10 increases the spacing between the battery cell assembly 30 and the housing 20, enhancing the structural rigidity of the battery device 100 and improving its resistance to vibration, shock, and side column impact. Furthermore, the plate-like structure of the retaining structure 10 is stable and provides a reliable fit, mitigating issues that can cause battery cell assembly 30 failure due to compression.

[0088] In the above-described technical solution, a retaining structure 10 is provided between the battery cell assembly 30 of the battery device 100 and the side wall of the housing 20. By supporting the side of the battery cell assembly 30, the retaining structure 10 can increase the position between the battery cell assembly 30 and the housing 20, thereby enhancing the structural rigidity of the battery device 100 and improving its vibration, shock, and side column impact resistance. Furthermore, the retaining structure 10 includes a first plate 1 and a second plate 2 arranged between the battery cell assembly 30 and the side wall of the housing 20. The first plate 1 has a first inclined surface 11 on the side facing the second plate 2, and the second plate 2 has a second inclined surface 21 on the side facing the first plate 1. The first inclined surface 11 and the second inclined surface 21 are aligned and angled relative to the depth direction of the housing 20. This facilitates the assembly of the battery cell assembly 30 into the housing 20 while also facilitating the assembly of the retaining structure 10 between the battery cell assembly 30 and the side wall of the housing 20. This reduces industrialization complexity and improves process feasibility.

[0089] In some embodiments, reference Figure 4 and Figure 5 The first plate body 1 and the second plate body 2 are connected and fixed by a snap-fit structure 3 .

[0090] When the first plate 1 and the second plate 2 are assembled between the battery cell assembly 30 and the side wall of the box body 20, the first plate 1 and the second plate 2 are connected and fixed by the snap-fit structure 3, wherein the snap-fit structure 3 can be arranged on the side of the first plate 1 and the second plate 2 facing each other.

[0091] In the above technical solution, the snap-fit structure 3 can improve the reliability of the connection between the first plate 1 and the second plate 2, and improve the problem of one of the first plate 1 and the second plate 2 falling out from between the battery cell assembly 30 and the side wall of the box body 20.

[0092] In some embodiments, as Figure 4 and Figure 5 As shown, the buckle structure 3 includes a first protrusion 31 and a first groove 32 . The first protrusion 31 is provided on one of the first inclined surface 11 and the second inclined surface 21 , and the first groove 32 is provided on the other of the first inclined surface 11 and the second inclined surface 21 .

[0093] The first inclined surface 11 may be provided with a first groove 32, and the second inclined surface 21 may be provided with a first protrusion 31 that matches the first groove 32, or the second inclined surface 21 may be provided with a first groove 32, and the first inclined surface 11 may be provided with a first protrusion 31 that matches the first groove 32. The first groove 32 may be provided along the length direction of the first plate 1 or the second plate 2 (e.g. Figure 4The first protrusion 31 may extend along the length of the first plate 1 or the second plate 2. The length directions of the first and second plates 1 and 2 may be perpendicular to the first and second directions. For example, the first groove 32 may be provided on the first plate 1, and the first protrusion 31 may be provided on the second plate 2. The first groove 32 may extend from one end of the length of the first plate 1 to the other, and the first protrusion 31 may extend from one end of the length of the second plate 2 to the other.

[0094] In the above technical solution, by providing a first groove 32 on one of the first inclined surface 11 and the second inclined surface 21, and providing a first protrusion 31 on the other of the first inclined surface 11 and the second inclined surface 21 to cooperate with the first groove 32, the first plate 1 and the second plate 2 can be relatively fixed and connected, thereby improving the problem of one of the first plate 1 and the second plate 2 being dislodged from between the battery cell assembly 30 and the side wall of the box body 20. At the same time, the simple snap-fit structure 3 can simplify the structure and processing of the first plate 1 and the second plate 2, thereby improving production efficiency.

[0095] In some embodiments, reference Figure 4 and Figure 5 At least one of the first plate body 1 and the second plate body 2 is provided with a cavity 22 .

[0096] It is understood that the cavity 22 may be provided only within the first plate 1, or only within the second plate 2, or both within the first plate 1 and the second plate 2. The provision of the cavity 22 can increase the deformation capacity of the first plate 1 or the second plate 2. When the retaining structure 10 is assembled into the gap between the battery cell assembly 30 and the side wall of the housing 20, the first plate 1 or the second plate 2 can undergo minor deformation, facilitating the assembly of the first and second plates 1 and 2 into the gap between the battery cell assembly 30 and the side wall of the housing 20. Furthermore, the cavity 22 structure can improve the side impact resistance of the battery device 100 when subjected to an impact load, reducing the risk of crushing and deformation due to the lack of support between the battery cell assembly 30 and the housing 20 when the battery device 100 is subjected to side impact energy, as well as the risk of leakage from the water cooling plate, which could lead to fire in the battery pack, or sharp objects puncturing the battery cells after crushing, causing battery cell failure.

[0097] In addition, when the first plate body 1 is provided with a cavity 22, the cavity 22 may be one or multiple cavity 22 arranged at intervals; when the second plate body 2 is provided with a cavity 22, the cavity 22 may be one or multiple cavity 22 arranged at intervals.

[0098] exist Figure 5In the example shown, the first plate body 1 is a solid structure, and only the second plate body 2 is provided with a cavity 22. The cavity 22 is one and extends from one end to the other end of the second plate body 2 in the longitudinal direction. Of course, the second plate body 2 can also be a solid structure, and the first plate body 1 can also have a cavity 22 structure.

[0099] In the above technical solution, by setting a cavity 22 structure in at least one of the first plate body 1 and the second plate body 2, the deformation ability of the first plate body 1 or the second plate body 2 can be improved, and when assembling the limiting structure 10 to the gap between the battery cell assembly 30 and the side wall of the box body 20, the assembly of the limiting structure 10 is facilitated, and the side column collision performance of the battery device 100 is improved.

[0100] In some embodiments, in a cross section perpendicular to the length direction of the first plate body 1 or the second plate body 2 , the shape of the cavity 22 is circular, elliptical, or polygonal.

[0101] For example, in Figure 5 In the example shown, the cross section of the cavity 22 perpendicular to the length direction of the second plate 2 is quadrilateral and trapezoidal.

[0102] In the above technical solution, by making the cross-section of the cavity 22 circular, elliptical or polygonal, the diversity of the shape of the cavity 22 can be increased, so that the cavity 22 is more in line with the structure of the first plate body 1 or the second plate body 2, and the internal structural layout of the first plate body 1 and the second plate body 2 can be made more compact and reasonable.

[0103] In some embodiments, reference Figure 5 A foam layer 4 is provided on the side of the first plate body 1 facing away from the second plate body 2 and / or on the side of the second plate body 2 facing away from the first plate body 1 .

[0104] It can be understood that the foam layer 4 can be provided only on the side of the first plate body 1 facing away from the second plate body 2, or the foam layer 4 can be provided only on the side of the second plate body 2 facing away from the first plate body 1, or the foam layer 4 can be provided on the side of the first plate body 1 facing away from the second plate body 2 and the foam layer 4 can be provided on the side of the second plate body 2 facing away from the first plate body 1.

[0105] When a foam layer 4 is provided on the side of the first plate body 1 facing away from the second plate body 2, the foam layer 4 and the first plate body 1 can be adhesively connected, and the foam layer 4 can completely cover the surface of the first plate body 1 on the side facing away from the second plate body 2, or partially cover the surface of the first plate body 1 on the side facing away from the second plate body 2. When a foam layer 4 is provided on the side of the second plate body 2 facing away from the first plate body 1, the foam layer 4 and the second plate body 2 can be adhesively connected, and the foam layer 4 can completely cover the surface of the second plate body 2 on the side facing away from the first plate body 1, or partially cover the surface of the second plate body 2 on the side facing away from the first plate body 1.

[0106] The foam layer 4 can be compressed along the first direction, and the foam layer 4 can fill the gap between the limiting structure 10 and the battery cell assembly 30 or the limiting structure 10 and the side wall of the box body 20. At the same time, when the foam layer 4 contacts the battery cell assembly 30, it can protect the battery cell assembly 30 and prevent the limiting structure 10 from scratching the battery cell assembly 30 during assembly; when the foam layer 4 contacts the side wall of the box body 20, the foam layer 4 can protect other components arranged on the inner side wall of the box body 20.

[0107] The foam layer 4 can have different compression rates as required.

[0108] In the above technical solution, a foam layer 4 is provided on the side of the first plate body 1 facing away from the second plate body 2 and / or the side of the second plate body 2 facing away from the first plate body 1, which can fill the gap between the limiting structure 10 and the battery cell assembly 30 or the limiting structure 10 and the box body 20, so that the limiting structure 10 can be tightly connected with the battery cell assembly 30 and the side wall of the box body 20, and at the same time can protect the battery cell assembly 30 or the components arranged on the inner side wall of the box body 20.

[0109] In some embodiments, reference Figure 5 As shown, the two ends of the limiting structure 10 along the depth direction (second direction) of the box body 20 are respectively a first end 10a and a second end 10b. The first end 10a is arranged close to the bottom wall of the box body 20 relative to the second end 10b. A second protrusion 13 is provided on the side of the first plate body 1 facing away from the second plate body 2. A foam layer 4 is provided on the side of the first plate body 1 facing away from the second plate body 2. The second protrusion 13 is located on the side of the foam layer 4 close to the first end 10a and is spaced apart from the first end 10a. The foam layer 4 abuts against the side wall of the box body 20 or the battery cell assembly 30.

[0110] The battery cell assembly 30 can be bonded to the bottom wall of the case 20 using structural adhesive. A groove structure is formed between the second protrusion 13 and the portion of the first plate 1 located on the side of the second protrusion 13 near the bottom wall of the case 20. If glue overflows after the battery cell assembly 30 is connected to the case 20, the overflowing glue can enter the groove structure. At the same time, the overflowing glue in the groove structure can achieve a connection between the limiting structure 10 and the bottom wall of the case 20. In addition, when the first plate 1 is located on the side of the second plate 2 near the side wall of the case 20, the overflowing glue in the groove structure can also achieve a connection between the limiting structure 10 and the side wall of the case 20.

[0111] The second protrusion 13 is located on the side of the foam layer 4 near the first end 10a, and the second protrusion 13 can support the foam layer 4. In addition, when the surface of the foam layer 4 facing away from the first plate 1 is not compressed, it extends beyond the second protrusion 13, so that the foam layer 4 can play a supporting and limiting role.

[0112] In the above technical solution, a second protrusion 13 is provided on the side of the first plate 1 facing away from the second plate 2, and a foam layer 4 is provided on the side of the first plate 1 facing away from the second plate 2. The second protrusion 13 is located on the side of the foam layer 4 near the first end 10a and is spaced apart from the first end 10a. The surface of the foam layer 4 facing away from the first plate 1 extends beyond the second protrusion 13 in an uncompressed state. This can accommodate overflow glue and facilitate the connection between the limiting structure 10 and the box body 20. In addition, the foam layer 4 can be better fixed, and the limiting structure 10 can better limit the battery cell assembly 30 and the box body 20 assembly.

[0113] In some embodiments, the second protrusion 13 is along the length direction of the first plate 1 (eg Figure 4 The first direction, the second direction, and the third direction are perpendicular to each other.

[0114] In the above technical solution, the volume of the groove structure for accommodating overflowing glue can be increased, and at the same time, the supporting effect on the foam layer 4 can be improved.

[0115] In some embodiments, the first plate 1 is located on a side of the second plate 2 away from the battery cell assembly 30 , and the first inclined surface 11 is inclined toward the second plate 2 along the depth direction (second direction) of the box 20 and in the direction toward the bottom wall of the box 20 .

[0116] When assembling the limiting structure 10, the first plate 1 can be first assembled to a predetermined position in the gap between the battery cell assembly 30 and the side wall of the box body 20. Then, the second plate 2 can be aligned with the gap between the first plate 1 and the battery cell assembly 30 and pressed down. With the cooperation of the first inclined surface 11 and the second inclined surface 21, the second plate 2 is pressed down between the first plate 1 and the battery cell assembly 30. At the same time, the first plate 1 moves toward the side wall of the box body 20 and is in close contact with the side wall of the box body 20, facilitating the assembly of the limiting structure 10. At the same time, during the assembly process of the limiting structure 10, the first plate 1 directly abutting the side wall of the box body 20 does not move up and down, thereby protecting the components located on the inner side wall of the box body 20.

[0117] In the above technical solution, by slanting the first inclined surface 11 toward the second plate 2 along the depth direction (second direction) of the box body 20 and toward the bottom wall of the box body 20, the assembly of the limiting structure 10 is facilitated. At the same time, the components located on the inner wall of the box body 20 can be protected.

[0118] In some embodiments, reference Figure 5 The second plate body 2 has a second plane 23 on a side facing away from the first plate body 1 , and the second plane 23 is perpendicular to the arrangement direction (first direction) of the first plate body 1 and the second plate body 2 .

[0119] The second plane 23 and the second inclined surface 21 are respectively located on two opposite sides of the second plate body 2 along the thickness direction (first direction). The second plate body 2 may be a plate body with an inverted trapezoidal cross section.

[0120] In the above technical solution, by providing a second plane 23 perpendicular to the arrangement direction of the first plate 1 and the second plate 2 on the side of the second plate 2 facing away from the first plate 1, the contact area between the battery cell assembly 30 in contact with the side of the second plate 2 facing away from the first plate 1 and the first plate 1 can be increased, and the limit between the battery cell assembly 30 and the side wall of the box body 20 can be increased, which can enhance the structural rigidity of the battery device 100 and improve the vibration impact and side column collision performance of the battery device 100.

[0121] In some embodiments, reference Figure 5 The first plate body 1 has a first plane 12 on a side facing away from the second plate body 2 . The first plane 12 intersects with the arrangement direction (first direction) of the first plate body 1 and the second plate body 2 , for example, is perpendicular to it.

[0122] The first plane 12 and the first inclined surface 11 are respectively located on two opposite sides of the first plate body 1 along the thickness direction (first direction). The first plate body 1 may be a plate body with a trapezoidal cross section.

[0123] In the above technical solution, by providing a first plane 12 perpendicular to the arrangement direction (first direction) of the first plate 1 and the second plate 2 on the side of the first plate 1 facing away from the second plate 2, the contact area between the side wall of the box 20 that contacts the side of the first plate 1 facing away from the second plate 2 and the first plate 1 can be increased, and the limit between the battery cell assembly 30 and the side wall of the box 20 can be increased, which can enhance the structural rigidity of the battery device 100 and improve the vibration, impact, and side column impact performance of the battery device 100.

[0124] In some embodiments, reference Figure 5 The two ends of the limiting structure 10 along the depth direction (second direction) of the box body 20 are respectively a first end 10a and a second end 10b. The first end 10a is arranged close to the bottom wall of the box body 20 relative to the second end 10b. A second groove 24 is provided on the side of the second plate body 2 facing away from the first plate body 1. The second groove 24 extends to the first end 10a and is open on the side facing away from the first plate body 1.

[0125] If glue overflows after the battery cell assembly 30 is connected to the case 20, the overflowed glue can enter the second groove 24. At the same time, the overflowed glue in the second groove 24 can connect the limiting structure 10 to the bottom wall of the case 20. In addition, when the second plate 2 is located on the side of the first plate 1 close to the side wall of the case 20, the overflowed glue in the second groove 24 can also connect the limiting structure 10 to the side wall of the case 20.

[0126] In the above technical solution, a second groove 24 is provided on the side of the second plate 2 facing away from the first plate 1 , and the side of the second groove 24 close to the first end 10 a is open, so as to contain overflow glue and facilitate the connection between the limiting structure 10 and the box 20 .

[0127] In some embodiments, reference Figure 4 and Figure 5 As shown, the two ends of the limiting structure 10 along the depth direction (second direction) of the box body 20 are respectively a first end 10a and a second end 10b, the first end 10a is arranged close to the bottom wall of the box body 20 relative to the second end 10b, and a third groove 14 is provided on at least one of the end surfaces of the first plate body 1 and the second plate body 2 close to the first end 10a.

[0128] If glue overflows after the battery cell assembly 30 is connected to the housing 20, the overflowed glue can enter the third groove 14. At the same time, the overflowed glue in the third groove 14 can connect the limiting structure 10 to the bottom wall of the housing 20. The third groove 14 can extend along the length direction (third direction) of the first plate 1 or the second plate 2, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0129] In the above technical solution, by providing a third groove 14 on at least one of the end surfaces of the first plate 1 and the second plate 2 close to the first end 10a, it can be used to accommodate the overflow of glue between the battery cell assembly 30 and the bottom wall of the box body 20, and facilitate the connection between the limiting structure 10 and the box body 20.

[0130] In some embodiments, reference Figure 4 and Figure 5 , the third groove 14 extends along the length direction (third direction) of the first plate 1 or the second plate 2; and / or, the third groove 14 is a plurality of grooves spaced apart along the arrangement direction (first direction) of the first plate 1 and the second plate 2.

[0131] For example, in Figure 4 and Figure 5 In the example shown, two third grooves 14 are provided on the end surface of the first plate body 1 near the first end 10a, the two third grooves 14 are spaced apart in the first direction, and each third groove 14 extends from one end of the first plate body 1 to the other end along the third direction; a third groove 14 is provided on the end surface of the second plate body 2 near the first end 10a, the third grooves 14 on the second plate body 2 and the third grooves 14 on the first plate body 1 are spaced apart in the first direction, and the third grooves 14 on the second plate body 2 extend from one end of the second plate body 2 to the other end along the third direction.

[0132] Of course, the present invention is not limited thereto, and the third groove 14 may also include a plurality of sub-grooves spaced apart along the third direction.

[0133] In the above technical solution, by extending the third groove 14 along the length direction of the first plate body 1 or the second plate body 2 or making the third groove 14 a plurality of grooves spaced apart along the arrangement direction of the first plate body 1 and the second plate body 2, the limiting structure 10 can accommodate more overflow glue and at the same time improve the reliability of the connection between the limiting structure 10 and the bottom wall of the box body 20.

[0134] In some embodiments, reference Figure 6 and Figure 7 There are two first plates 1 , and the two first plates 1 are respectively located on the side of the second plate 2 facing the battery cell assembly 30 and the side facing the side wall of the box body 20 .

[0135] It can be understood that the two first plate bodies 1 have a first inclined surface 11 on one side facing the second plate body 2, and the second plate body 2 has a second inclined surface 21 on both sides facing the two first plate bodies 1, that is, on both sides opposite to the second plate body 2 along the first direction, and the cross-section of the second plate body 2 parallel to the first direction and the second direction is trapezoidal.

[0136] When the limiting structure 10 is assembled between the battery cell assembly 30 and the side wall of the box body 20 , one of the first plates 1 is located between the battery cell assembly 30 and the second plate 2 , and the other first plate 1 is located between the side wall of the box body 20 and the second plate 2 .

[0137] In addition, there is a snap-fit structure 3 between each pair of mutually fitting first inclined surfaces 11 and second inclined surfaces 21. When the second plate 2 slides between the two first plate bodies 1, the two first plate bodies 1 are connected and fixed to the second plate body 2 through the snap-fit structure 3, which can prevent the first plate body 1 or the second plate body 2 from escaping from the gap between the battery cell assembly 30 and the side wall of the box body 20.

[0138] In the above technical solution, by providing two first plates 1 and a second plate 2 located between the two first plates 1 , the assembly of the limiting structure 10 can be facilitated while improving the flexibility of the limiting structure 10 .

[0139] In some embodiments, reference Figure 6 and Figure 7 The two ends of the limiting structure 10 along the depth direction (second direction) of the box body 20 are respectively a first end 10a and a second end 10b. The first end 10a is arranged close to the bottom wall of the box body 20 relative to the second end 10b. In the direction from the first end 10a to the second end 10b, the two second inclined surfaces 21 are inclined in a direction away from each other.

[0140] Among them, in the direction from the first end 10a to the second end 10b, the two first inclined surfaces 11 are inclined in the direction away from each other, the two first inclined surfaces 11 of the two first plates 1 can be symmetrically arranged, and the two second inclined surfaces 21 of the second plate 2 can be symmetrically arranged, and the second plate 2 is a trapezoidal structure with inclined surfaces on both sides along the first direction.

[0141] When assembling the limiting structure 10, first assemble the two first plates 1 to the predetermined position between the battery cell assembly 30 and the side wall of the box body 20, space the two first plates 1 along the first direction, align the second plate 2 with the gap between the two first plates 1 and press down toward the gap between the two first plates 1, and slide the second plate 2 along the inclined surface of the first plate 1 into between the two first plates 1.

[0142] The first plate 1 is provided between the second plate 2 and the battery cell assembly 30 and the side wall of the box body 20 . The second plate 2 can reduce friction damage to the components on the battery cell assembly 30 and the side wall of the box body 20 during the downward pressing process.

[0143] In the above technical solution, by making the two second inclined surfaces 21 tilt away from each other in the direction from the first end 10a to the second end 10b, the assembly of the limiting structure 10 is facilitated while protecting the battery cell assembly 30 and the components arranged on the side walls of the box body 20, making the structure of the battery device 100 safer and more reliable.

[0144] Reference below Figure 8 An electric device 1000 according to an embodiment of the present invention is described.

[0145] In a second aspect, the present invention provides an electrical device 1000 , which includes the battery device 100 according to the embodiment of the first aspect of the present invention.

[0146] The power-consuming device 1000 may be a vehicle, and the battery device 100 may be installed at the bottom of the vehicle body 200 .

[0147] In the above-described technical solution, by providing the battery device 100 of the first aspect, a retaining structure 10 is provided between the battery cell assembly 30 of the battery device 100 and the side wall of the housing 20. By supporting the side of the battery cell assembly 30, the retaining structure 10 can increase the positional distance between the battery cell assembly 30 and the housing 20, thereby enhancing the structural rigidity of the battery device 100 and improving the vibration, shock, and side column impact resistance of the battery device 100. Furthermore, the retaining structure 10 includes a first plate 1 and a second plate 2 arranged between the battery cell assembly 30 and the side wall of the housing 20. The first plate 1 has a first inclined surface 11 on the side facing the second plate 2, and the second plate 2 has a second inclined surface 21 on the side facing the first plate 1. The first inclined surface 11 and the second inclined surface 21 are aligned and angled relative to the depth direction of the housing 20, facilitating the assembly of the battery cell assembly 30 into the housing 20 while also facilitating the assembly of the retaining structure 10 between the battery cell assembly 30 and the side wall of the housing 20. This reduces industrialization difficulty and improves process feasibility.

[0148] Reference below Figure 4-Figure 7 A battery device 100 according to some embodiments of the present invention is described.

[0149] According to some embodiments of the present invention, Figure 4 and Figure 5 As shown, in this embodiment, the limiting structure 10 is suitable for being arranged between the side wall of the box body 20 of the battery device 100 and the battery cell assembly 30 along the first direction, and the limiting structure 10 includes: a first plate body 1 and a second plate body 2, the first plate body 1 and the second plate body 2 are arranged in the first direction, the first plate body 1 has a first inclined surface 11 on the side facing the second plate body 2, and the second plate body 2 has a second inclined surface 21 on the side facing the first plate body 1, the first inclined surface 11 and the second inclined surface 21 are in contact with each other and form an angle with each other in the second direction, wherein the second direction is perpendicular to the first direction and is the depth direction of the box body 20.

[0150] Along the second direction, in the direction from the open side of the upper end of the box body 20 to the bottom wall of the box body 20, the first inclined surface 11 can be inclined toward the second plate body 2, and the second inclined surface 21 can be inclined in a direction away from the first plate body 1. The first plate body 1 and the second plate body 2 are spliced together by the first inclined surface 11 and the second inclined surface 21. When assembling the limiting structure 10, the first plate body 1 can be first assembled to a predetermined position between the battery cell assembly 30 and the side wall of the box body 20, and then the second plate body 2 can be assembled on the side of the first inclined surface 11. The second plate body 2 is pressed down with pressure. Due to the cooperation between the first inclined surface 11 and the second inclined surface 21, the second plate body 2 squeezes the first plate body 1 to one side along the first inclined surface 11 until the second plate body 2 is installed between the battery cell assembly 30 and the side wall of the box body 20. At this time, the limiting structure 10 abuts against the battery cell assembly 30 and the side wall of the box body 20, thereby increasing the limit between the battery cell assembly 30 and the side wall of the box body 20.

[0151] The coordination of the first and second inclined surfaces 11, 21 facilitates the integral assembly of the retaining structure 10 between the battery cell assembly 30 and the sidewall of the battery device 100 housing 20. This facilitates the insertion of the battery cell assembly 30 into the housing while increasing process feasibility. Furthermore, the retaining structure 10 increases the spacing between the battery cell assembly 30 and the housing 20, enhancing the structural rigidity of the battery device 100 and improving its resistance to vibration, shock, and side column impact. Furthermore, the plate-like structure of the retaining structure 100 provides a stable shape and reliable fit, mitigating the problem of battery cell assembly 30 failure caused by compression.

[0152] Reference Figure 4 and Figure 5 The first plate 1 and the second plate 2 are connected and fixed by a snap-fit structure 3. The snap-fit structure 3 includes a first protrusion 31 and a first groove 32 that cooperate with each other. The first groove 32 is provided on the first plate 1, and the first protrusion 31 is provided on the second plate 2. The first groove 32 extends from one end to the other end of the length direction of the first plate 1, and the first protrusion 31 extends from one end to the other end of the length direction of the second plate 2. The relative fixation and connection between the first plate 1 and the second plate 2 can be achieved, and the problem of one of the first plate 1 and the second plate 2 escaping from between the battery cell assembly 30 and the side wall of the box body 20 can be improved. At the same time, the snap-fit structure 3 is simple, which can simplify the structure and processing technology of the first plate 1 and the second plate 2, and improve production efficiency.

[0153] refer to Figure 4 and Figure 5 The first plate body 1 is a solid structure, and a cavity 22 is provided in the second plate body 2. The cavity 22 is one and extends from one end of the second plate body 2 to the other end in the length direction. The provision of the cavity 22 can increase the deformation capacity of the second plate body 2. When the limiting structure 10 is assembled into the gap between the battery cell assembly 30 and the side wall of the case 20, the second plate body 2 can undergo a small deformation, which facilitates the assembly of the first plate body 1 and the second plate body 2 into the gap between the battery cell assembly 30 and the side wall of the case 20. In addition, the cavity 22 structure can improve the side column collision performance of the battery device 100 when the battery device 100 is subjected to an impact load, and reduce the problem of crushing and deformation caused by the lack of support between the battery cell assembly 30 and the case 20 when the battery device 100 is subjected to side impact energy, as well as the problem of leakage of the water cooling plate causing a fire in the battery pack, or sharp objects puncturing the battery cell after crushing, causing the battery cell to fail.

[0154] The cross section of the cavity 22 perpendicular to the length direction of the second plate 2 is a quadrilateral and a trapezoid.

[0155] The first plate 1 is located on the side of the second plate 2 away from the battery cell assembly 30. Figure 5The side of the first plate 1 facing away from the second plate 2 has a first flat surface 12 perpendicular to the first direction. The first plate 1 can have a trapezoidal cross-section. This increases the contact area between the sidewall of the housing 20 that contacts the side of the first plate 1 facing away from the second plate 2 and the first plate 1, thereby increasing the spacing between the battery cell assembly 30 and the sidewall of the housing 20. This can enhance the structural rigidity of the battery device 100 and improve its resistance to vibration, shock, and side column impact.

[0156] A foam layer 4 is provided on the side of the first plate body 1 facing away from the second plate body 2. The foam layer 4 can be adhesively connected to the first plate body 1. The foam layer 4 can be compressed along a first direction. The foam layer 4 abuts against the side wall of the box body 20 and can fill the gap between the limiting structure 10 and the box body 20. At the same time, when the foam layer 4 contacts the side wall of the box body 20, the foam layer 4 can protect other components arranged on the inner wall of the box body 20.

[0157] The limiting structure 10 has two ends along the second direction, namely a first end 10a and a second end 10b. The first end 10a is located near the bottom wall of the case 20, opposite the second end 10b. A second protrusion 13 is provided on the side of the first plate 1 facing away from the second plate 2. The second protrusion 13 extends along a third direction, with the third direction, the second direction, and the first direction being perpendicular to each other. The second protrusion 13 is located on the side of the foam layer 4 near the first end 10a and is spaced apart from the first end 10a. The surface of the foam layer 4 facing away from the first plate 1 extends beyond the second protrusion 13 when uncompressed. The battery cell assembly 30 and the bottom wall of the case 20 can be bonded together using structural adhesive. A groove structure is formed between the second protrusion 13 and the portion of the first plate 1 located on the side of the second protrusion 13 near the bottom wall of the case 20. If adhesive overflow occurs after the battery cell assembly 30 and the case 20 are connected, the overflowed adhesive can enter the groove structure. At the same time, the overflowed adhesive within the groove structure can achieve the connection between the limiting structure 10 and the bottom wall of the case 20. In addition, the overflowing glue in the groove structure can also realize the connection between the limiting structure 10 and the side wall of the box body 20.

[0158] The second protrusion 13 is located on the side of the foam layer 4 near the first end 10a, and the second protrusion 13 can support the foam layer 4. In addition, when the surface of the foam layer 4 facing away from the first plate 1 is not compressed, it extends beyond the second protrusion 13, so that the foam layer 4 can play a supporting and limiting role.

[0159] refer to Figure 5The second plate 2 has a second flat surface 23 on the side facing away from the first plate 1. The second flat surface 23 is perpendicular to the first direction. This increases the contact area between the battery cell assembly 30 or the sidewall of the housing 20, which contacts the side of the second plate 2 facing away from the first plate 1, and the first plate 1. This increases the spacing between the battery cell assembly 30 and the sidewall of the housing 20, thereby increasing the structural rigidity of the battery device 100 and improving its resistance to vibration, shock, and side column impact. The second plate 2 may have an inverted trapezoidal cross-section.

[0160] refer to Figure 5 A second groove 24 is defined on the side of the second plate 2 facing away from the first plate 1. The second groove 24 extends to the first end 10a and is open on the side facing away from the first plate 1. If glue overflows after the battery cell assembly 30 is connected to the case 20, the overflowed glue can enter the second groove 24. At the same time, the overflowed glue in the second groove 24 can connect the retaining structure 10 to the bottom wall of the case 20.

[0161] refer to Figure 5 , a third groove 14 is provided on the end surface of the first plate 1 and the second plate 2 near the first end 10a. Specifically, two third grooves 14 are provided on the end surface of the first plate 1 near the first end 10a. The two third grooves 14 are spaced apart in the first direction, and each third groove 14 extends from one end of the first plate 1 to the other end along the third direction; a third groove 14 is provided on the end surface of the second plate 2 near the first end 10a. The third groove 14 on the second plate 2 and the third groove 14 on the first plate 1 are spaced apart in the first direction, and the third groove 14 on the second plate 2 extends from one end of the second plate 2 to the other end along the third direction. When glue overflow occurs after the battery cell assembly 30 is connected to the box 20, the overflow glue can enter the third groove 14. At the same time, the overflow glue in the third groove 14 can realize the connection between the limiting structure 10 and the bottom wall of the box 20. The third groove 14 can extend along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0162] According to other embodiments of the present invention, Figure 6 and Figure 7As shown, in this embodiment, the limiting structure 10 is suitable for being arranged between the side wall of the box body 20 of the battery device 100 and the battery cell assembly 30 along the first direction, and the limiting structure 10 includes: two first plates 1 and a second plate body 2, the two first plates 1 are respectively located on both sides of the second plate body 2 along the first direction, the two first plates 1 have a first inclined surface 11 on the side facing the second plate body 2, and the second plate body 2 has a second inclined surface 21 on both sides facing the two first plates 1, that is, on both sides of the second plate body 2 along the first direction, the first inclined surface 11 of the first plate body 1 and the second inclined surface 21 of the second plate body 2 are in contact with each other and form an angle with the second direction, wherein the second direction is perpendicular to the first direction and is the depth direction of the box body 20.

[0163] When the limiting structure 10 is assembled between the battery cell assembly 30 and the side wall of the box body 20 , one of the first plates 1 is located between the battery cell assembly 30 and the second plate 2 , and the other first plate 1 is located between the side wall of the box body 20 and the second plate 2 .

[0164] refer to Figure 6 and Figure 7 The two ends of the limiting structure 10 along the second direction are respectively a first end 10a and a second end 10b. The first end 10a is arranged relative to the second end 10b close to the bottom wall of the box body 20. In the direction from the first end 10a to the second end 10b, the two second inclined surfaces 21 are inclined in directions away from each other, and the two first inclined surfaces 11 are inclined in directions away from each other. The two first inclined surfaces 11 of the two first plates 1 can be arranged symmetrically, and the two second inclined surfaces 21 of the second plate body 2 can be arranged symmetrically. The second plate body 2 is a trapezoidal structure with inclined surfaces on both sides along the first direction.

[0165] When assembling the limiting structure 10, first, the two first plates 1 are assembled to the predetermined position between the battery cell assembly 30 and the side wall of the casing 20. The two first plates 1 are spaced apart along a first direction. The second plate 2 is then aligned with the gap between the two first plates 1 and pressed downward toward the gap between the two first plates 1. The second plate 2 slides along the inclined surface of the first plate 1 and into the space between the two first plates 1. The first plate 1 is located between the second plate 2 and both the battery cell assembly 30 and the side wall of the casing 20. During the downward pressing process, the second plate 2 can reduce frictional damage to components on the battery cell assembly 30 and the side wall of the casing 20.

[0166] The coordination of the first and second inclined surfaces 11, 21 facilitates the integral assembly of the retaining structure 10 between the battery cell assembly 30 and the sidewall of the battery device 100 housing 20. This facilitates the insertion of the battery cell assembly 30 into the housing while increasing process feasibility. Furthermore, the retaining structure 10 increases the spacing between the battery cell assembly 30 and the housing 20, enhancing the structural rigidity of the battery device 100 and improving its resistance to vibration, shock, and side column impact. Furthermore, the plate-like structure of the retaining structure 100 provides a stable shape and reliable fit, mitigating the problem of battery cell assembly 30 failure caused by compression.

[0167] Reference Figure 6 and Figure 7 , a snap-fit structure 3 is provided between each pair of mutually fitting first inclined surfaces 11 and second inclined surfaces 21. The snap-fit structure 3 includes a first protrusion 31 and a first groove 32 that cooperate with each other. The first groove 32 is provided on the first plate 1, and the first protrusion 31 is provided on the second plate 2. The first groove 32 extends from one end to the other end of the length direction of the first plate 1, and the first protrusion 31 extends from one end to the other end of the length direction of the second plate 2. This can achieve relative fixation and connection between the first plate 1 and the second plate 2, and improve the problem of one of the first plate 1 and the second plate 2 being detached from between the battery cell assembly 30 and the side wall of the box body 20. At the same time, the snap-fit structure 3 is simple, which can simplify the structure and processing technology of the first plate 1 and the second plate 2, and improve production efficiency.

[0168] refer to Figure 6 and Figure 7 The first plate body 1 is a solid structure, and a cavity 22 is provided in the second plate body 2. The cavity 22 is one and extends from one end of the second plate body 2 to the other end in the longitudinal direction. The provision of the cavity 22 can increase the deformation capacity of the second plate body 2. When the limiting structure 10 is assembled into the gap between the battery cell assembly 30 and the side wall of the case 20, the second plate body 2 can undergo a small deformation, which facilitates the assembly of the first plate body 1 and the second plate body 2 into the gap between the battery cell assembly 30 and the side wall of the case 20. In addition, the cavity 22 structure can improve the side column collision performance of the battery device 100 when the battery device 100 is subjected to an impact load, and prevent the battery device 100 from being crushed and deformed due to the lack of support between the battery cell assembly 30 and the case 20 when the battery device 100 is subjected to side impact energy, thereby preventing the water cooling plate from leaking and causing the battery pack to catch fire, or forming sharp objects after crushing that pierce the battery cell and cause the battery cell to fail.

[0169] The cross section of the cavity 22 perpendicular to the length direction of the second plate 2 is a quadrilateral and a trapezoid.

[0170] refer to Figure 7The first plate 1 has a first flat surface 12 on the side facing away from the second plate 2, and the first flat surface 12 is perpendicular to the first direction. The first plate 1 can have a trapezoidal cross-section. This increases the contact area between the sidewall of the housing 20 that contacts the side of the first plate 1 facing away from the second plate 2, and between the battery cell assembly 30 and the first plate 1. This increases the spacing between the battery cell assembly 30 and the sidewall of the housing 20, thereby enhancing the structural rigidity of the battery device 100 and improving its resistance to vibration, shock, and side column impact.

[0171] A foam layer 4 is provided on the side of the first plate body 1 facing away from the second plate body 2. The foam layer 4 can be adhesively connected to the first plate body 1. The foam layer 4 can be compressed along the first direction. The foam layer 4 can fill the gap between the limiting structure 10 and the box body 20. At the same time, when the foam layer 4 contacts the side wall of the box body 20, the foam layer 4 can protect other components arranged on the inner wall of the box body 20. When the foam layer 4 contacts the battery cell assembly 30, it can protect the battery cell assembly 30.

[0172] The limiting structure 10 has two ends along the second direction, namely a first end 10a and a second end 10b. The first end 10a is located near the bottom wall of the case 20, opposite the second end 10b. A second protrusion 13 is provided on the side of the first plate 1 facing away from the second plate 2. The second protrusion 13 extends along a third direction, with the third direction, the second direction, and the first direction being perpendicular to each other. The second protrusion 13 is located on the side of the foam layer 4 near the first end 10a and is spaced apart from the first end 10a. The surface of the foam layer 4 facing away from the first plate 1 extends beyond the second protrusion 13 when uncompressed. The battery cell assembly 30 and the bottom wall of the case 20 can be bonded together using structural adhesive. A groove structure is formed between the second protrusion 13 and the portion of the first plate 1 located on the side of the second protrusion 13 near the bottom wall of the case 20. If adhesive overflow occurs after the battery cell assembly 30 and the case 20 are connected, the overflowed adhesive can enter the groove structure. At the same time, the overflowed adhesive within the groove structure can achieve the connection between the limiting structure 10 and the bottom wall of the case 20. In addition, the overflowing glue in the groove structure can also realize the connection between the limiting structure 10 and the side wall of the box body 20 and the battery cell assembly 30.

[0173] The second protrusion 13 is located on the side of the foam layer 4 near the first end 10a, and the second protrusion 13 can support the foam layer 4. In addition, when the surface of the foam layer 4 facing away from the first plate 1 is not compressed, it extends beyond the second protrusion 13, so that the foam layer 4 can play a supporting and limiting role.

[0174] refer to Figure 7, a third groove 14 is provided on the end surface of the first plate body 1 near the first end 10a. Specifically, two third grooves 14 are provided on the end surface of each first plate body 1 near the first end 10a, and the two third grooves 14 are spaced apart in the first direction, and each third groove 14 extends from one end of the first plate body 1 to the other end along the third direction. When glue overflow occurs after the battery cell assembly 30 is connected to the box body 20, the overflowed glue can enter the third groove 14, and at the same time, the overflowed glue in the third groove 14 can realize the connection between the limiting structure 10 and the bottom wall of the box body 20. Among them, the third groove 14 can extend along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0175] In an embodiment of the present invention, the battery cell assembly 30 is installed in the box body 20. Due to factors such as assembly tolerance and material tolerance, a large gap needs to be maintained between the battery cell assembly 30 and the box body 20 after the battery cell assembly 30 is installed. The limiting structure 10 can be installed after the battery cell assembly 30 is assembled into the box body 20 to connect the battery cell assembly 30 and the box body 20 together, thereby improving the overall stiffness and mechanical performance strength of the battery device 100.

[0176] Furthermore, if the battery assembly 100 is not equipped with the retaining structure 10, and the vehicle is hit by a side pole or squeezed from the side, the gap between the box 20 and the battery cell assembly 30 creates a weak area and rapidly deforms, causing water coolant leakage and insulation failure of the battery assembly 100. Alternatively, deformation of the box 20 may create sharp structures that puncture the battery cells, triggering cell failure. If the battery assembly 100 is equipped with the retaining structure 10, and the vehicle is involved in a side collision, the side of the box 20 connects to the retaining structure 10 and the battery cell assembly 30. The side beams of the box 20 deform to absorb energy, reducing failures caused by cell deformation.

[0177] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0178] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that: include: Box; A battery cell assembly, wherein the battery cell assembly is arranged in the box; A limiting structure, wherein the limiting structure is arranged between the side wall of the box and the battery cell assembly and abuts against the side wall of the box and the battery cell assembly, the limiting structure includes a first plate and a second plate, the first plate is located on the side of the second plate facing the battery cell assembly or the side wall of the box, the first plate has a first inclined surface on the side facing the second plate, and the second plate has a second inclined surface on the side facing the first plate, the first inclined surface and the second inclined surface are in contact with each other and form an angle with each other in the depth direction of the box.

2. The battery device according to claim 1, wherein: The first plate body and the second plate body are connected and fixed by a snap-fit structure.

3. The battery device according to claim 2, characterized in that The buckle structure includes a first protrusion and a first groove, wherein the first protrusion is provided on one of the first inclined surface and the second inclined surface, and the first groove is provided on the other of the first inclined surface and the second inclined surface.

4. The battery device according to claim 1, wherein: At least one of the first plate body and the second plate body is provided with a cavity therein.

5. The battery device according to claim 4, characterized in that In a cross section perpendicular to the length direction of the first plate body or the second plate body, the shape of the cavity is circular, elliptical or polygonal.

6. The battery device according to claim 1, wherein: A foam layer is provided on a side of the first plate body facing away from the second plate body and / or a side of the second plate body facing away from the first plate body.

7. The battery device according to claim 6, characterized in that The two ends of the limiting structure along the depth direction of the box body are respectively a first end and a second end, and the first end is arranged close to the bottom wall of the box body relative to the second end. A second protrusion is provided on the side of the first plate body facing away from the second plate body, and a foam layer is provided on the side of the first plate body facing away from the second plate body. The second protrusion is located on the side of the foam layer close to the first end and is spaced apart from the first end. The foam layer abuts against the side wall of the box body or the battery cell assembly.

8. The battery device according to claim 7, characterized in that The second protrusion extends along the length direction of the first plate body.

9. The battery device according to claim 1, wherein: The first plate is located on a side of the second plate away from the battery cell assembly. Along the depth direction of the box and in the direction toward the bottom wall of the box, the first inclined surface is inclined toward the second plate.

10. The battery device according to claim 9, characterized in that A side of the second plate body facing away from the first plate body has a second plane, and the second plane is perpendicular to the arrangement direction of the first plate body and the second plate body.

11. The battery device according to claim 9, characterized in that A side of the first plate body facing away from the second plate body has a first plane, and the first plane intersects with an arrangement direction of the first plate body and the second plate body.

12. The battery device according to claim 1, wherein: The two ends of the limiting structure along the depth direction of the box body are respectively a first end and a second end, and the first end is arranged close to the bottom wall of the box body relative to the second end. A second groove is provided on a side of the second plate body facing away from the first plate body. The second groove extends to the first end and is open on a side facing away from the first plate body.

13. The battery device according to any one of claims 1 to 12, characterized in that: The two ends of the limiting structure along the depth direction of the box body are respectively a first end and a second end, and the first end is arranged close to the bottom wall of the box body relative to the second end. A third groove is formed on at least one of the end surfaces of the first plate body and the second plate body close to the first end.

14. The battery device according to claim 13, wherein: The third groove extends along the length direction of the first plate body or the second plate body; And / or, the third grooves are multiple and spaced apart along the arrangement direction of the first plate body and the second plate body.

15. The battery device according to any one of claims 1 to 8, characterized in that: There are two first plates, and the two first plates are respectively located on a side of the second plate facing the battery cell assembly and a side facing the side wall of the box.

16. The battery device according to claim 15, characterized in that The two ends of the limiting structure along the depth direction of the box body are respectively a first end and a second end, the first end is arranged close to the bottom wall of the box body relative to the second end, and in the direction from the first end to the second end, the two second inclined surfaces are inclined in a direction away from each other.

17. An electrical device, characterized in that: A battery device comprising the battery device according to any one of claims 1 to 16.

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