Battery device and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery device and electric equipment.The battery device comprises single batteries, a box body and a bottom protective plate, the box body comprises a main body part and a connecting part which are connected, the single batteries are contained in the main body part, and at least part of the connecting part is located on the outer side of the main body part in the first direction; the first direction is perpendicular to the height direction of the box body; the bottom protection plate is located on one side, in the height direction of the box body, of the main body part; the bottom protection plate comprises a first part, a bending part and a second part which are connected in sequence, the first part and the second part are connected through the bending part, and the first part and the second part are located on the two opposite sides of the connecting part respectively in the height direction of the box body, so that the first part and the second part are matched to clamp the connecting part. By means of the mode, the bottom protection plate is connected with the box body, the step that the bottom protection plate and the box body are connected through rivets or bolts or welding or other modes can be omitted, and the convenience of connection of the bottom protection plate and the box body can be improved.

Description

Technical Field

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

[0002] Electricity is a very environmentally friendly energy source, with applications in various fields, including energy storage, transportation, daily necessities, and scientific research. In particular, batteries are being widely used in the automotive industry with the rise of new energy vehicles. Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmental advantages, have become a crucial component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] As battery technology develops, the structure of battery devices is also being simplified. Therefore, how to achieve convenient connection between components of battery devices is a technical problem that needs to be solved. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device. The battery device is configured to solve the technical problem of inconvenient connection between components of the battery device by improving the connection method between the bottom guard plate and the box body.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is to provide a battery device, which includes a battery cell; a box body, the box body includes a main body and a connecting part connected to each other, the battery cell is accommodated in the main body, at least part of the connecting part is located on the outside of the main body along a first direction, and the first direction is perpendicular to the height direction of the box body; the bottom guard plate, the bottom guard plate is located on one side of the main body along the height direction of the box body; the bottom guard plate includes a first part, a bending part and a second part connected in sequence, the first part and the second part are connected by the bending part, and along the height direction of the box body, the first part and the second part are respectively located on opposite sides of the connecting part, so that the first part and the second part cooperate to clamp the connecting part.

[0006] By using the first part and the second part of the bottom guard plate to clamp the connecting part, the bottom guard plate and the box body are connected, which can save the steps of using rivets, bolts or welding to connect the bottom guard plate and the box body, and is conducive to improving the convenience of connecting the bottom guard plate and the box body.

[0007] In some embodiments, the main body includes side walls and a bottom plate, and the connecting portion connects the side walls and extends along a plane where the bottom plate is located in a direction away from the bottom plate.

[0008] In this way, the connecting portion is arranged on the outside of the side wall, and the connecting portion can provide support for the side wall, which is beneficial to improving the anti-overturning ability of the side wall.

[0009] In some embodiments, the main body further includes a cold plate disposed between the bottom plate and the first portion, the first portion contacting the cold plate; and / or the bottom plate is formed with a flow channel for passing a heat conducting medium.

[0010] The above arrangement can improve the heat dissipation efficiency of the main body and reduce the risk of the battery cells being affected in terms of performance due to overheating.

[0011] In some embodiments, the connecting portion includes an upper step portion and a lower step portion, the upper step portion of the connecting portion is connected to the side wall, and the lower step portion of the connecting portion is located between the second portion and the bottom plate. Along the height direction of the box body, the upper step portion is farther away from the bottom plate than the lower step portion, and the upper step portion and the bottom plate are separated to form an accommodating cavity, and a sealing member is provided in the accommodating cavity.

[0012] This structure can reduce the possibility of water entering the box body and can eliminate the height difference between the accommodating cavity and the sealing member.

[0013] In some embodiments, the first portion is bonded to the main body.

[0014] This method is helpful to improve the stability of the connection between the bottom guard plate and the main body of the box, and can also use the adhesive to waterproof, reducing the possibility of water entering the gap between the bottom guard plate and the main body.

[0015] In some embodiments, the connecting portion is arranged around the bottom plate, and the bent portion of the bottom guard plate is arranged around the connecting portion.

[0016] This arrangement can make the connection area between the bottom guard plate and the connecting portion as large as possible, thereby making the connection between the bottom guard plate and the connecting portion more secure.

[0017] In some embodiments, a gap is formed between the bending portion and the connecting portion, and a filler is provided in the gap.

[0018] This arrangement enables the filler to seal the location where the connecting portion is connected to the first portion of the bottom guard plate, thereby reducing the possibility of water entering the battery device.

[0019] In some embodiments, along the first direction, a size of the area where the second portion contacts the connecting portion is 3-7 mm.

[0020] Setting the size of the area where the second part contacts the connecting part to be greater than or equal to 3mm is beneficial to improving the stability of the connection between the bottom guard plate and the box body; setting the size of the area where the second part contacts the connecting part to be less than or equal to 7mm is beneficial to reducing redundancy and saving materials while taking into account the stability of the connection.

[0021] In some embodiments, side beams are further provided on the side walls. The side beams are located outside the box body and spaced apart from the connecting portion.

[0022] The side beams are used to connect the box to external components to facilitate the movement of the box. The side beams are spaced apart from the connecting parts to reduce the possibility of interference between the two during use.

[0023] In order to solve the above technical problems, another technical solution adopted in the present application is to provide an electrical device, which includes the above-mentioned battery device.

[0024] By using the first and second parts of the bottom guard plate to clamp the connection part in the battery device, the bottom guard plate and the box body are connected, without the need to use rivets or welding to connect the bottom guard plate and the box body, thereby improving the convenience of connecting the bottom guard plate and the box body.

[0025] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above content and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 A schematic structural diagram of an electrical device according to one or more embodiments of the present application;

[0028] Figure 2 is a schematic diagram of an exploded structure of a battery device according to one or more embodiments of the present application;

[0029] Figure 3 Schematic diagram of a top view of a box body of a battery cell according to one or more embodiments of the present application;

[0030] Figure 4 Schematic diagram of a top view of a bottom guard plate of a battery cell according to one or more embodiments of the present application;

[0031] Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure at O-O';

[0032] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of region A;

[0033] Figure 7Schematic diagram of the structure of the bottom guard plate before lamination according to one or more embodiments of the present application;

[0034] Figure 8 for Figure 7 Schematic diagram of the structure after the bottom guard plate is pressed together.

[0035] Among them, 1000-electrical equipment; 100-battery device; 200-controller; 300-motor; 10-box; 110-main body; 11-side wall; 12-bottom plate; 13-connecting part; 131-upper step part; 132-lower step part; 133-accommodating cavity; 134-seal; 14-cold plate; 15-side beam; 20-bottom guard plate; 21-first part; 22-bending part; 23-second part; 24-gap. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the present application are described in detail. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only used as examples and are not intended to limit the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of this application, technical terms such as "first" and "second" are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance, or to implicitly indicate the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of this application, unless otherwise expressly specified, the term "plurality" refers to more than two (including two). Similarly, "multiple groups" refers to more than two (including two), and "multiple sheets" refers to more than two (including two).

[0039] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. 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. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0041] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "above", "below", "bottom", "inside", and "outside" is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the embodiments of the present application.

[0042] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0043] The battery device disclosed in the embodiments of the present application can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft. A power supply system of the electrical equipment can be composed of the battery cells and batteries disclosed in the present application.

[0044] The present invention provides an electrical device that uses a battery device as a power source. The electrical device may include, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0045] The battery device includes a case and a battery cell, and the battery cell is accommodated in the case. The case is used to provide a storage space for the battery cell, and the case can adopt a variety of structures. In some embodiments, the case may include a first part and a second part, the first part and the second part covering each other, and the first part and the second part jointly define a storage space for accommodating the battery cell. The second part can be a hollow structure with one end open, and the first part can be a plate-like structure, and the first part covers the open side of the second part, so that the first part and the second part jointly define a storage space. Therefore, the first part can also be called an upper cover, and the second part can also be called a storage part. In addition, the first part and the second part can also be hollow structures with one side open, and the open side of the first part covers the open side of the second part. Of course, the case formed by the first part and the second part can be of various shapes, such as a cylinder, a cuboid, etc.

[0046] In a battery device, there may be multiple battery cells, and the multiple battery cells may be connected in series, in parallel, or in a mixed connection. Mixed connection means that the multiple battery cells are connected in series and in parallel. Multiple battery cells may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells is accommodated in a box; of course, the battery device may also be in the form of a battery module in which multiple battery cells are first connected in series, in parallel, or in a mixed connection, and the multiple battery modules are then connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in a box. The battery device may also include other structures. For example, the battery device may also include a busbar component for achieving electrical connection between the multiple battery cells. Each battery cell may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto.

[0047] The battery device includes a box body and a bottom guard plate. The box body includes side walls and a bottom plate, and the side walls and the bottom plate are connected to form a storage space with an opening for accommodating battery cells. The box body also includes a box lid covering the opening, thereby completing the sealing of the battery cells. The bottom guard plate is used to protect the bottom plate of the box body to prevent objects from hitting the bottom plate of the box body during transportation or use, thereby causing the box body to deform and squeeze the battery cells inside it, causing safety problems. However, the existing method of connecting the bottom guard plate and the box body is usually to extend outward at the position where the side wall and the bottom plate are connected to form a connecting part, and then fix the bottom guard plate and the connecting part with bolts or rivets. This fixing method requires leaving fixing holes on the bottom guard plate and the connecting part, and then aligning them, and then screwing or riveting them. This connection process is complicated and requires a long time to operate.

[0048] Based on the above considerations, and in order to address the technical issues of complex bottom guard plate connections in the prior art for battery cases, the present application proposes a battery device and electrical equipment, wherein the bottom guard plate of the battery device is connected to the case by hemming, eliminating the need for screwing, riveting, or welding, and requiring only pressing. The battery device comprises a case and a bottom guard plate. The case comprises side walls and a bottom plate, and the side walls are connected to the bottom plate. A connecting portion is formed on the side walls at the location where they connect to the bottom plate, extending away from the bottom plate along the plane of the bottom plate. The bottom guard plate comprises a first portion, a bent portion, and a second portion, forming an integral structure. The first portion is positioned against the bottom plate, and the first and second portions are connected by the bent portion. Along the height direction of the case, the first and second portions are located on opposite sides of the connecting portion, so that the first and second portions cooperate to clamp the connecting portion. In this way, the bottom guard plate can be connected to the case by clamping the connecting portion between the first and second portions of the bottom guard plate, thereby improving the convenience of connecting the bottom guard plate to the case.

[0049] For the convenience of description, the following embodiments are described by taking an electric device 1000 of an embodiment of the present application as a vehicle as an example.

[0050] Please refer to Figure 1 , Figure 1 Schematic diagram of the structure of an electrical device according to one or more embodiments of the present application.

[0051] In this embodiment, the electrical device 1000 is a vehicle, which can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle, and the battery device 100 can be provided at the bottom, head, or tail of the vehicle. The battery device 100 can be used to power the vehicle, for example, the battery device 100 can serve as an operating power source for the vehicle. The vehicle may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting the vehicle, navigating, and meeting the power requirements of the vehicle during operation.

[0052] In some embodiments of the present application, the battery device 100 can 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.

[0053] In order to improve the convenience of connecting the bottom guard plate and the box body, this application provides a battery device and electrical equipment, please refer to Figures 2 to 6 , Figure 2 is a schematic diagram of an exploded structure of a battery device according to one or more embodiments of the present application; Figure 3 Schematic diagram of a top view of a box body of a battery cell according to one or more embodiments of the present application; Figure 4Schematic diagram of a top view of a bottom guard plate of a battery cell according to one or more embodiments of the present application; Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure at O-O', Figure 6 for Figure 5 Schematic diagram of the enlarged structure of area A in FIG. The battery device 100 includes a battery cell (not shown), a box body 10 and a bottom guard plate 20. The box body 10 includes a main body 110 and a connecting portion 13 connected to each other, and the battery cell is accommodated in the main body 110. At least part of the connecting portion 13 is located on the outside of the main body 110 along the first direction X, and the first direction X is perpendicular to the height direction of the box body 10. The bottom guard plate 20 is located on one side of the main body 110 along the height direction of the box body. The bottom guard plate 20 includes a first part 21, a bending portion 22 and a second part 23 connected in sequence. The first part 21 and the second part 23 are connected by the bending portion 22. Along the height direction of the box body 10, the first part 21 and the second part 23 are respectively located on opposite sides of the connecting portion 13, so that the first part 21 and the second part 23 cooperate to clamp the connecting portion 13.

[0054] The main body 110 forms a storage space with an opening, which can be used to accommodate components such as battery cells. Part or all of the connecting portion 13 is located on the outside of the main body 110 along the first direction X. The portion of the main body 110 facing the battery cell along the first direction X is the inner side, and the portion of the main body 110 away from the battery cell along the first direction X is the outer side. The first direction X is perpendicular to the height direction of the box body 10, that is, the first direction X and the height direction of the box body 10 form an angle of 90°. However, considering the tolerances in the preparation process or assembly process, the vertical setting between the first direction X and the height direction of the box body 10 can accommodate a certain error. As an illustrative example, the error range is 3°, that is, the first direction X and the height direction of the box body 10 form an angle of 87° to 93°, then the first direction X is considered to be perpendicular to the height direction of the box body 10. The bottom guard plate 20 can be an integral structure, including a first part 21, a bending part 22 and a second part 23 connected in sequence. The first part 21 is the part located below the main body 110 and the connecting part 13, and the second part 23 is the part above the connecting part 13. Therefore, along the height direction of the box body 10, the first part 21 and the second part 23 are respectively located on both sides of the connecting part 13. The bending part 22 is an arc-shaped structure, which is the position where the bottom guard plate 20 is bent, connecting the first part 21 and the second part 23. The first part 21 and the second part 23 cooperate with the clamping connecting part 13, so that the bottom guard plate 20 is connected to the connecting part 13 by clamping, thereby fixing the bottom guard plate 20 to the box body 10. In some embodiments, the first part 21 and the second part 23 are arranged in parallel, with an error range of 5°. The first part 21 and the second part 23 are respectively located on opposite sides of the connecting part 13, but need to cooperate with the clamping connecting part 13, and the clamping effect is best when the first part 21 and the second part 23 are arranged in parallel. The first portion 21 and the second portion 23 are arranged parallel to each other. Generally, there is no angle between the first portion 21 and the second portion 23. However, due to tolerances in the manufacturing and assembly processes, a certain degree of tolerance can be accommodated in the parallel arrangement of the first portion 21 and the second portion 23. For example, the tolerance range is 5°. That is, if the first portion 21 and the second portion 23 form an angle of no greater than 5°, the first portion 21 and the second portion 23 are considered to be parallel to each other. This arrangement improves the effectiveness of the first portion 21 and the second portion 23 of the bottom guard plate 20 in clamping the connecting portion 13.

[0055] See also Figure 7 and Figure 8 , Figure 7 Schematic diagram of the structure of the bottom guard plate before being pressed together according to one or more embodiments of the present application. Figure 8 for Figure 7Schematic diagram of the structure of the bottom guard plate after pressing together. The second part 23 of the undocked bottom guard plate 20 is at a certain angle to the first part 21, which can be 90 degrees or greater than 90 degrees. Then, the first part 21 of the bottom guard plate 20 is fitted onto the bottom plate 12 of the box body 10, and the second part 23 is pressed onto the connecting part 13 of the box body 10 by a pressure roller or other pressing device, thereby realizing the connection between the bottom guard plate 20 and the box body 10. The bending part 22 is actually a connecting part formed by bending the second part 23 of the bottom guard plate 20 relative to the first part 21. This fixing method can omit the screws or rivets in the traditional installation method, and directly realize the connection between the bottom guard plate 20 and the box body 10 by bending the edge of the bottom guard plate 20, thereby simplifying the process and method of connecting the bottom guard plate 20 and the box body 10, making the connection method of the bottom guard plate 20 and the box body 10 more convenient. This connection method can be achieved manually or by a pressure roller device. During the battery device production process, rollers are used in many places. Existing roller equipment on the production line can be used without incurring additional equipment costs. Therefore, this connection method can save the cost of screws, rivets, or welding. Using roller equipment can also further reduce labor costs, thereby saving costs.

[0056] By utilizing the first part 21 and the second part 23 of the bottom guard plate 20 to clamp the connecting portion 13, the bottom guard plate 20 is connected to the box body 10. This can eliminate the need to use rivets, bolts or welding to connect the bottom guard plate 20 and the box body 10, thereby improving the convenience of connecting the bottom guard plate 20 and the box body 10.

[0057] In some embodiments, the main body 110 includes a side wall 11 and a bottom plate 12. The connecting portion 13 is connected to the side wall 11 and extends along the plane where the bottom plate 12 is located in a direction away from the bottom plate 12.

[0058] The side wall 11 is connected to the bottom plate 12 and is arranged around the bottom plate 12. The side wall 11 can be connected to the bottom plate 12 by welding or other methods. The connection position between the side wall 11 and the bottom plate 12 is the bottom end of the side wall 11, and extending along the plane where the bottom plate 12 is located in the direction away from the bottom plate 12 is extending outward. The connecting portion 13 and the bottom plate 12 are respectively located on opposite sides of the side wall 11, and the connecting portion 13 and the bottom plate 12 are both located at the bottom end of the side wall 11. In some embodiments, the side wall 11 is perpendicular to the bottom plate 12, and the connecting portion 13 is perpendicular to the side wall 11. The vertical design can make the interior and exterior of the box body 10 more standardized, which is conducive to the placement of other components. The side wall 11 is perpendicular to the bottom plate 12, and generally the side wall 11 and the bottom plate 12 are at a 90° angle, but considering the tolerances in the preparation process or assembly process, the vertical arrangement of the side wall 11 and the bottom plate 12 and the vertical arrangement of the connecting portion 13 and the side wall 11 can accommodate a certain error. As an example, the error range is 3°, that is, if the angle between the side wall 11 and the bottom plate 12 is 87° to 93°, the side wall 11 is considered perpendicular to the bottom plate 12. Similarly, if the angle between the connecting portion 13 and the side wall 11 is 87° to 93°, the connecting portion 13 is considered perpendicular to the side wall 11.

[0059] In this way, the connecting portion is arranged on the outside of the side wall, and the connecting portion 13 can provide support for the side wall 11, which is beneficial to improving the anti-overturning ability of the side wall 11.

[0060] In some embodiments, the battery device 100 further includes a cold plate 14 . The cold plate 14 is disposed between the bottom plate 12 and the first portion 21 . The first portion 21 contacts the cold plate 14 .

[0061] The cold plate 14 is a plate used for heat dissipation in the battery device 100. The cold plate 14 is used to cool the components in the box 10 by liquid cooling using a heat-conducting medium, such as water or other coolant, and can perform heat exchange from the bottom of the box 10, thereby taking away the heat inside the box 10. In addition, the cold plate 14 can also be a phase change material cold plate, which is filled with phase change material and uses phase change material to balance heat. Since the cold plate 14 is generally a plate-shaped structure, it is beneficial to increase the contact area between the cold plate 14 and the base plate 12, thereby improving the heat dissipation efficiency. The cold plate 14 can be connected to the base plate 12 by gluing, welding, screwing, riveting, etc.

[0062] The provision of the cold plate 14 can improve the heat dissipation efficiency of the main body 110 and reduce the risk of the battery cells being affected in terms of performance due to overheating.

[0063] In some embodiments, the bottom plate 12 is formed with flow channels for passing a heat-conducting medium. Using the bottom plate 12 to dissipate heat from the battery cells improves the heat dissipation efficiency of the main body 110 and reduces the risk of overheating affecting the performance of the battery cells, while also simplifying the structure, compared to using a cold plate 14.

[0064] In some embodiments, the connection portion 13 includes an upper stepped portion 131 and a lower stepped portion 132. The upper stepped portion 131 of the connection portion 13 is connected to the side wall 11, and the lower stepped portion 132 of the connection portion 13 is located between the second portion 23 and the bottom plate 12. Along the height direction of the box body 10, the upper stepped portion 131 is farther away from the bottom plate 12 than the lower stepped portion 132. A receiving cavity 133 is formed between the upper stepped portion 131 and the bottom plate 12, and a sealing member 134 is disposed in the receiving cavity 133.

[0065] A step structure is a common structure, typically having two offset portions. Relatively speaking, the portion farther from the bottom plate 12 is the upper step portion 131, and the portion closer to the bottom plate 12 is the lower step portion 132. That is, along the height direction of the box body 10, the upper step portion 131 is farther from the bottom plate 12 than the lower step portion 132. In this embodiment, the portion of the connecting portion 13 connecting to the side wall 11 is the upper step portion 131, and the portion of the connecting portion 13 farther from the side wall 11 is the lower step portion 132. A certain space is formed between the upper step portion 131 and the bottom plate 12, and this space is the accommodating cavity 133. The seal 134 is a component used for waterproofing, such as a colloid, resin, rubber, etc. The provision of the seal 134 can fill the gap between the bottom plate 12 and the side wall 11, thereby reducing the risk of liquids such as water entering the interior of the box body 10 through the gap between the bottom plate 12 and the side wall 11.

[0066] In some embodiments, the first portion 21 is bonded to the main body 110 .

[0067] The first portion 21 of the bottom guard plate 20 can be coated with an adhesive to bond the first portion 21 of the bottom guard plate 20 to the main body 110. In some embodiments, the first portion 21 can be bonded to the sidewall 11 of the main body 110. This helps to improve the stability of the connection between the bottom guard plate 20 and the main body 110 of the box 10. The adhesive can also be used to provide waterproofing, reducing the possibility of water entering the gap between the bottom guard plate 20 and the main body 110.

[0068] In some embodiments, the connecting portion 13 is disposed around the bottom plate 12 , and the bent portion 22 of the bottom guard plate 20 is disposed around the connecting portion 13 .

[0069] The connecting portion 13 surrounds the bottom plate 12, forming a ring-shaped structure. The specific ring shape is determined by the overall shape of the sidewall 11 of the housing 10. The bent portion 22 of the bottom guard plate 20 surrounds the connecting portion 13, sandwiching the connecting portion 13 in all directions along the plane of the bottom plate 12. Consequently, the bottom guard plate 20 connects to the connecting portion 13 over a greater area, providing a larger connection surface.

[0070] This arrangement can make the connection area between the bottom guard plate 20 and the connecting portion 13 as large as possible, thereby making the connection between the bottom guard plate 20 and the connecting portion 13 more secure.

[0071] In some embodiments, a gap 24 is formed between the bending portion 22 and the connecting portion 13 , and a filler is provided in at least a portion of the space in the gap 24 .

[0072] Since the bending portion 22 is a bending structure, which can be an arc-shaped structure or a semicircular structure, a small gap 24 is formed between the bending portion 22 and the end of the connecting portion 13 away from the side wall 11 along the plane where the bottom plate 12 is located. A accommodating space, namely the gap 24, is formed between the connecting portion 13, the first part 21 and the second part 23. Fillers such as colloid, rubber, and resin can be provided at least in part of this accommodating space, thereby reducing the possibility of liquids such as water penetrating into the space between the first part 21 and the bottom plate 12 through this gap 24. In addition, when the bottom guard plate 20 and the bottom plate 12 are connected by gluing, the colloid between the bottom guard plate 20 and the bottom plate 12 can overflow into the gap 24, which can save the step of adding additional fillers.

[0073] This arrangement enables the filler to seal the location where the connecting portion 13 is connected to the first portion 21 of the bottom guard plate 20 , thereby reducing the possibility of water entering the battery device 100 .

[0074] In some embodiments, along the first direction X, a dimension h of the area where the second portion 23 contacts the connecting portion 13 is 3-7 mm.

[0075] The second portion 23 is the portion of the bottom guard plate 20 that is bent and laid flat above the connection portion 13. The dimension h of the area where the second portion 23 contacts the connection portion 13 can be any one of 3mm, 3.1mm, 3.2mm, 3.3mm, 3.5mm, 3.8mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, and 7mm, or any one of any two numerical ranges mentioned above. In some embodiments, along the plane of the bottom plate 12, perpendicular to the direction of the side wall 11, the dimension h of the second portion 23 is 5mm. The lower limit of the dimension h is 3mm to ensure the stability of the connection, and the upper limit of the dimension h is 7mm to reduce redundancy and save materials while taking into account the stability of the connection.

[0076] Setting the size of the area where the second part 23 contacts the connecting part 13 to be greater than or equal to 3 mm is beneficial to improving the stability of the connection between the bottom guard plate 20 and the box body 10; setting the size of the area where the second part 23 contacts the connecting part 13 to be less than or equal to 7 mm is beneficial to taking into account the stability of the connection while reducing redundancy and saving materials.

[0077] In some embodiments, a side beam 15 is further provided on the side wall 11 . The side beam 15 is located outside the box body 10 and is spaced apart from the connecting portion 13 .

[0078] The side wall 11, side beam 15 and connecting portion 13 on the same side of the box body 10 can be an integral structure. The side beam 15 is a structure extending from the side wall 11, so the side wall 11 and the side beam 15 are generally manufactured and formed at the same time. The connecting portion 13 is also a part extending from the side wall 11, so the side wall 11, side beam 15 and connecting portion 13 on one side of the box body 10 can also be the same part, just named differently for different positions and functions, thus forming an integral structure. In addition, the side wall 11, side beam 15 and connecting portion 13 on the same side of the box body 10 can also be interconnected structures rather than an integral structure. For example, the side wall 11, side beam 15 and connecting portion 13 are connected by welding. This structure can make the overall structure of the side wall 11, side beam 15 and connecting portion 13 of the box body 10 more stable.

[0079] The side beam 15 is used to connect the box body 10 with external components to facilitate the movement of the box body 10. The side beam 15 and the connecting portion 13 are spaced apart to reduce the possibility of interference between the two when in use.

[0080] In order to solve the above technical problem, another technical solution adopted in the present application is to provide an electrical device, which includes the above-mentioned battery device 100.

[0081] In this electrical equipment 1000, the bottom guard plate 20 is connected to the box body 10 by clamping the connecting portion 13 using the first part 21 and the second part 23 of the bottom guard plate 20 in the battery device 100. There is no need to use rivets or welding to connect the bottom guard plate 20 and the box body 10, thereby improving the convenience of connecting the bottom guard plate 20 and the box body 10.

[0082] In a specific application scenario, in response to the problem of high production costs of the existing battery device 100, the battery device 100 of the present application includes a battery cell, a box body 10 and a bottom guard plate 20. The box body 10 includes a main body 110 and a connecting portion 13 connected to each other, and the battery cell is accommodated in the main body 110. At least part of the connecting portion 13 is located on the outside of the main body 110 along the first direction X, and the first direction X is perpendicular to the height direction of the box body 10. The bottom guard plate 20 is located on one side of the main body 110 along the height direction of the box body. The bottom guard plate 20 includes a first portion 21, a bending portion 22 and a second portion 23 connected in sequence. The first portion 21 and the second portion 23 are connected by the bending portion 22. Along the height direction of the box body 10, the first portion 21 and the second portion 23 are respectively located on opposite sides of the connecting portion 13, so that the first portion 21 and the second portion 23 cooperate to clamp the connecting portion 13. The main body 110 includes a side wall 11 and a bottom plate 12. The connecting portion 13 is connected to the side wall 11 and extends along the plane of the bottom plate 12 in a direction away from the bottom plate 12. The first portion 21 is bonded to the main body 110. The battery device 100 also includes a cold plate 14, which is arranged between the bottom plate 12 and the first portion 21, and the first portion 21 contacts the cold plate 14. The connecting portion 13 includes an upper step portion 131 and a lower step portion 132. The upper step portion 131 of the connecting portion 13 is connected to the side wall 11, and the lower step portion 132 of the connecting portion 13 is located between the second portion 23 and the bottom plate 12. Along the height direction of the box body 10, the upper step portion 131 is farther away from the bottom plate 12 than the lower step portion 132. A accommodating cavity 133 is formed between the upper step portion 131 and the bottom plate 12, and a sealing member 134 is provided in the accommodating cavity 133.

[0083] By using the first portion 21 and the second portion 23 of the bottom guard plate 20 to clamp the connection portion 13, the bottom guard plate 20 is connected to the housing 10. This eliminates the need for rivets, bolts, or welding to connect the bottom guard plate 20 and the housing 10, thereby improving the ease of connection between the bottom guard plate 20 and the housing 10. In this way, the connection portion is positioned on the outside of the side wall, and the connection portion 13 can provide support for the side wall 11, thereby improving the side wall 11's ability to resist overturning. This method improves the stability of the connection between the bottom guard plate 20 and the main body 110 of the housing 10. Adhesive adhesive can also be used to provide waterproofing, reducing the possibility of water entering the gap between the bottom guard plate 20 and the main body 110. The provision of the cold plate 14 can improve the heat dissipation efficiency of the main body 110 and reduce the risk of battery cell performance being affected by overheating. The provision of the sealing member 134 can fill the gap between the bottom plate 12 and the side wall 11 , thereby reducing the risk of liquids such as water entering the interior of the box body 10 through the gap between the bottom plate 12 and the side wall 11 .

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: The battery device comprises: Battery cells; a box body, the box body comprising a main body portion and a connecting portion connected to each other, the battery cells being accommodated in the main body portion, at least a portion of the connecting portion being located outside the main body portion along a first direction perpendicular to a height direction of the box body; A bottom guard plate, the bottom guard plate is located on one side of the main body along the height direction of the box body; the bottom guard plate includes a first part, a bending part and a second part connected in sequence, the first part and the second part are connected through the bending part, and along the height direction of the box body, the first part and the second part are respectively located on opposite sides of the connecting part, so that the first part and the second part cooperate to clamp the connecting part.

2. The battery device according to claim 1, wherein: The main body includes side walls and a bottom plate. The connecting portion is connected to the side walls and extends along a plane where the bottom plate is located in a direction away from the bottom plate.

3. The battery device according to claim 2, characterized in that The main body further includes a cold plate, the cold plate is disposed between the bottom plate and the first portion, and the first portion contacts the cold plate; and / or The bottom plate is formed with a flow channel, and the flow channel is used for passing a heat-conducting medium.

4. The battery device according to claim 2, wherein: The connecting portion includes an upper step portion and a lower step portion, the upper step portion of the connecting portion is connected to the side wall, and the lower step portion of the connecting portion is located between the second portion and the bottom plate. Along the height direction of the box body, the upper step portion is farther away from the bottom plate than the lower step portion, and the upper step portion and the bottom plate are separated to form an accommodating cavity, and a sealing member is provided in the accommodating cavity.

5. The battery device according to any one of claims 1 to 4, characterized in that: The first portion is bonded to the main body.

6. The battery device according to any one of claims 2 to 4, characterized in that: The connecting portion is arranged around the bottom plate, and the bent portion of the bottom guard plate is arranged around the connecting portion.

7. The battery device according to claim 6, characterized in that A gap is formed between the bending portion and the connecting portion, and a filler is arranged in the gap.

8. The battery device according to any one of claims 1 to 4, characterized in that: Along the first direction, a size of an area where the second portion contacts the connecting portion is 3-7 mm.

9. The battery device according to any one of claims 2 to 4, characterized in that: The side walls are further provided with side beams, which are located outside the box body and spaced apart from the connecting portion.

10. An electrical device, characterized in that: The electrical equipment comprises the battery device according to any one of claims 1 to 9.

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