Lower box body, box body with lower box body, battery pack and power utilization device

Abstract

The utility model discloses a lower box body and a box body, a battery pack and an electric device with the lower box body, the lower box body is used for the battery pack, the lower box body comprises a bottom plate, the bottom plate extends along a first direction in a horizontal plane, two side edges of the bottom plate in a second direction in the horizontal plane are provided with first connecting parts, and the first connecting parts are used for connecting an upper box body of the battery pack; the first direction intersects with the second direction; the number of the first side plates is two, the first side plates are arranged at the two ends, in the first direction, of the bottom plate correspondingly, the first side plates are vertically arranged, and the lower ends of the first side plates are connected with the bottom plate in a full welding mode. According to the lower box body, the two first side plates are arranged, the lower ends of the first side plates are connected with one end, in the first direction, of the bottom plate in a full welding mode, the lower box body can be machined and formed easily, the lower box body is more flexible and convenient to produce and manufacture, and the production cost is low.

Description

Technical Field

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

[0002] In order to meet the installation and layout requirements of different vehicle types, battery packs often need to be designed with box structures of different sizes or shapes. For some vehicles with narrow installation space, the box structure of the battery pack needs to be designed to be very compact while maintaining a large energy density of the battery pack to meet the installation and layout requirements. In the related art, in order to make the structural strength of the battery pack box meet the requirements, the lower box structure in the battery pack box is often designed to be more complicated, which makes it difficult to form the lower box of the battery pack when it is processed and manufactured in an integrated manner, resulting in a high production cost and inconvenience in manufacturing. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a lower box body, which can be processed and formed more conveniently, making the production of the lower box body more convenient.

[0004] The utility model also provides a box body having the lower box body.

[0005] The utility model also provides a battery pack having the box body.

[0006] The utility model also provides an electrical device having the battery pack.

[0007] According to the lower box body of the first aspect of the utility model, the lower box body is used for a battery pack, and the lower box body includes: a bottom plate, the bottom plate extends along a first direction in a horizontal plane, and the two side edges of the bottom plate in a second direction in the horizontal plane are provided with first connecting parts, and the first connecting parts are used to connect to the upper box body of the battery pack, and the first direction intersects with the second direction; a first side plate, the number of the first side plates is two and they are respectively arranged at both ends of the bottom plate in the first direction, the first side plate is vertically arranged, and the lower end of the first side plate is fully welded to the bottom plate.

[0008] According to the lower box body of the utility model, by setting two first side panels, the lower ends of the first side panels are fully welded to one end of the bottom plate in the first direction, so that the lower box body can be processed and formed more easily, and the production of the lower box body is more flexible and convenient with lower production costs.

[0009] In some embodiments of the present invention, a connecting flange extending along the first direction toward the bottom plate is formed at the lower end of the first side plate, and the connecting flange is overlapped and welded to the bottom plate.

[0010] In this embodiment, a connecting flange is formed at the lower end of the first side panel, which is overlapped and welded to the bottom plate, so that the first side panel can be connected and fixed to the bottom plate more conveniently and reliably. The first side panel is overlapped with the bottom plate, so that the bottom plate can better support and fix the first side panel, and the connection and fixation between the first side panel and the bottom plate is more stable and reliable. The connecting flange forms an angle with the vertically extending structure of the first side panel, so that the lower end of the first side panel has better structural strength, thereby greatly improving the overall structural strength of the first side panel and making the connection and fixation between the first side panel and the bottom plate more stable and reliable.

[0011] In one embodiment of the utility model, the bottom plate is provided with support plate portions at both ends in the first direction, and the connecting flange is supported on the upper surface of the support plate portion and connected to the support plate portion.

[0012] In this embodiment, a support plate portion is provided on the bottom plate and is connected with the connecting flange, so that the connection and fixation between the first side plate and the bottom plate can be more stable and reliable, thereby making the molding of the lower box body more convenient and easy.

[0013] In some embodiments of the present invention, a positioning structure is provided on at least one of the bottom plate and the first side plate, and the positioning structure is used to position the first side plate on the bottom plate, and the positioning structure is formed as a positioning hole, a positioning column and / or a positioning surface.

[0014] This embodiment provides a positioning structure on at least one of the bottom plate and the first side plate so that the first side plate and the bottom plate can be positioned and assembled more conveniently and quickly, thereby making the assembly of the bottom plate and the first side plate more convenient and improving the production efficiency of the lower box body.

[0015] In some embodiments of the utility model, the two side edges of the bottom plate in the second direction are formed with first connecting edges extending vertically, the first connecting portion is formed on the first connecting edge, the first connecting portion is formed as a first connecting hole and passes through the first connecting edge along the second direction, the number of the first connecting holes is multiple, and the multiple first connecting holes are arranged at intervals along the first direction, and the first connecting edge is connected to the upper box body by fasteners passing through the first connecting holes.

[0016] In this embodiment, the first connecting edge is set to extend vertically and the first connecting hole is set on the first connecting edge, and the upper box body and the lower box body are connected and fixed by fasteners passing through the first connecting hole along the second direction. After the lower box body and the upper box body are assembled, the overall structure is more compact and the layout space can be better utilized, so that the battery pack can be installed and arranged more conveniently in scenarios where the installation space is small, so that the battery pack can have a higher energy density.

[0017] In an embodiment of the present invention, a first connecting nut is embedded in the first connecting hole.

[0018] In this embodiment, a first connecting nut is embedded in the position of the first connecting hole, so that when the lower box body and the upper box body are assembled and fixed, a fastener can extend from the outside into the first connecting hole and cooperate with the first connecting nut to screw the lower box body and the upper box body, making the connection and fixation of the lower box body and the upper box body more convenient and easy.

[0019] In an embodiment of the present invention, the first connecting edge is formed by bending both side edges of the bottom plate in the second direction upward.

[0020] In the present embodiment, the first connecting edge is formed by bending, which has a simple structure and is easy to process, making the processing of the bottom plate relatively convenient and easy. By bending the bottom plate to form the first connecting edge, the structural strength of the bottom plate on both sides in the second direction can be greatly enhanced, thereby greatly improving the overall structural strength of the bottom plate. To a certain extent, the bottom plate can be reduced in weight while maintaining good structural strength, thereby meeting the need for lightweighting and improving the weight energy density of the battery pack to a certain extent.

[0021] In some embodiments of the present invention, the lower box body further includes: a reinforcing structure, which is connected to the bottom plate and arranged on the lower side of the bottom plate.

[0022] In this embodiment, a reinforcement structure is arranged on the bottom plate, so that the overall structural strength of the bottom plate can meet the support and fixation requirements in the battery pack. When the bottom plate is designed and manufactured, the bottom plate structure can be flexibly and conveniently adjusted and optimized in conjunction with the arrangement of the reinforcement structure, thereby reducing the structural strength requirements of the bottom plate to a certain extent, making the bottom plate structure simpler and using less material, thereby reducing the difficulty of processing and manufacturing the bottom plate and the overall structural weight of the bottom plate and the reinforcement structure, making the production of the lower box easier and more convenient.

[0023] In an embodiment of the present invention, the reinforcement structure is connected to the bottom plate by welding.

[0024] The invention implements the method of welding the reinforcing structure to the base plate, which is convenient and reliable, and makes the reinforcing structure and the base plate connected stably and firmly.

[0025] In one embodiment of the present invention, the reinforcement structure is a frame structure and includes: a first reinforcement member, the number of the first reinforcement members is two, the two first reinforcement members extend along the first direction and are arranged at intervals in the second direction; a second reinforcement member, the second reinforcement member extends along the second direction and the two ends of the second reinforcement member are respectively connected to the two first reinforcement members.

[0026] In this embodiment, the reinforcement structure is set as a frame structure, which is light in weight, has good structural strength, and uses less materials, so that the overall structure of the lower box is light in weight, thereby improving the weight energy density of the battery pack to a certain extent. In this embodiment, a first reinforcement member extending along the first direction and a second reinforcement member extending along the second direction are provided. The first reinforcement member and the second reinforcement member cooperate to play a good structural reinforcement role for the bottom plate in the first direction and the second direction, so that the bottom plate can be more stably and reliably supported and fixed after being connected and fixed to the reinforcement structure.

[0027] In some examples of the present invention, there are multiple second reinforcement members, and the multiple second reinforcement members are arranged at intervals along the first direction.

[0028] In this embodiment, multiple second reinforcement members are provided and arranged along the first direction, so that the second reinforcement members can more comprehensively cover the extension range of the base plate in the first direction, so that the base plate can obtain stable and reliable structural reinforcement, and the distribution of the reinforcement structure and the overall structure of the base plate is more uniform and reasonable.

[0029] In some examples of the present invention, the first reinforcement includes: a first plate portion and a second plate portion, the first plate portion is vertically arranged, the second plate portion is connected to the lower end of the first plate portion and extends along the second direction toward the second reinforcement until it is connected to the second reinforcement, and the bottom plate is arranged between the two first plate portions of the two first reinforcements.

[0030] In this embodiment, the first reinforcement member includes a first plate portion arranged vertically and a first plate portion extending along the second direction. The first plate portion and the second plate portion are used to reinforce the bottom and edges of the bottom plate on both sides of the second direction, so that the structure at the first connecting hole of the bottom plate can be well reinforced, so that the connection and fixation of the bottom plate with the upper box body is more stable and reliable when assembled and fixed.

[0031] In one example of the utility model, a first folded edge extending upward is formed at one end of the second plate portion facing away from the first plate portion, a groove is defined between the first folded edge and the first plate portion, and first connecting edges extending vertically are formed on both side edges of the bottom plate in the second direction, the first connecting edge is arranged in the groove, and the first connecting portion is formed on the first connecting edge.

[0032] In this embodiment, the second plate portion is formed with a first folded edge which cooperates with the first plate portion to define a groove, so that when the base plate is connected and fixed to the reinforcement structure, the first connecting edge can be positioned and matched in the groove more quickly and conveniently, thereby facilitating the assembly connection between the base plate and the reinforcement structure.

[0033] In some specific embodiments of the present invention, a plurality of avoidance holes are formed on the first plate portion and penetrate the first plate portion along the second direction, the plurality of avoidance holes correspond one-to-one to the plurality of first connecting portions, and the avoidance holes are directly opposite to the corresponding first connecting portions in the second direction so that the first connecting portions are exposed.

[0034] In this embodiment, a plurality of avoidance holes corresponding to the first connecting parts are arranged on the first plate part, so as to facilitate the cooperation between the first connecting part on the bottom plate and the fastener.

[0035] In some specific embodiments of the present invention, a second folded edge extending away from the first plate portion along the second direction is formed at the upper end of the first folded edge, and the second folded edge is overlapped with the upper surface of the second reinforcement.

[0036] In this embodiment, by forming a second folded edge extending along the second direction at the upper end of the first folded edge, the structural strength of the second plate portion can be improved, so that the first reinforcement can play a better structural reinforcement role for the bottom plate. To a certain extent, the first reinforcement can be designed and manufactured with less material, thereby better meeting the need for lightweight lower box. The provision of the second folded edge can enable the first reinforcement and the second reinforcement to have a good matching overlap surface when connected and fixed, making the connection and fixation of the first reinforcement and the second reinforcement more convenient and stable.

[0037] In some examples of the present invention, both the first reinforcement member and the second reinforcement member are sheet metal members.

[0038] In this embodiment, the first reinforcement and the second reinforcement are both configured as sheet metal parts, so that the first reinforcement and the second reinforcement are convenient to form, easy to process, and have low manufacturing cost. The first reinforcement and the second reinforcement after processing are light in weight and high in structural strength, thereby playing a good role in structural reinforcement of the bottom plate and meeting the need for lightweighting the lower box, thereby greatly improving the weight energy density of the battery pack.

[0039] In some embodiments of the utility model, a connecting flange extending along the first direction toward the bottom plate is formed at the lower end of the first side panel, and the connecting flange is welded to the bottom plate. A second connecting edge extending along the first direction is formed at the periphery of the first side panel, and the second connecting edge extends along the circumference of the first side panel and its two ends are respectively connected to the two ends of the connecting flange in the second direction. A plurality of second connecting holes are formed on the second connecting edge, and the plurality of second connecting holes are arranged at intervals along the circumference of the first side panel. The second connecting edge is connected to the upper box body by fasteners passing through the second connecting holes.

[0040] In this embodiment, by forming a second connecting edge extending along the first direction toward the bottom plate on the circumference of the first side plate, the connection and fixation between the lower box body and the upper box body can be more convenient and stable, and the box structure formed by the lower box body and the upper box body has a larger accommodating cavity space, thereby improving the energy density of the battery pack to a certain extent.

[0041] In an embodiment of the present invention, a second connecting nut is embedded in the second connecting hole.

[0042] In this embodiment, a second connecting nut is embedded in the position of the second connecting hole, so that when the lower box body and the upper box body are assembled and fixed, the fastener can extend from the outside into the second connecting hole and cooperate with the second connecting nut to screw the lower box body and the upper box body, making the connection and fixation of the lower box body and the upper box body more convenient and easy.

[0043] The box body according to the second aspect of the utility model includes a lower box body according to the first aspect of the utility model; and an upper box body, wherein the upper box body includes a top plate and a second side plate, the second side plates are two, the two second side plates are respectively connected to the two ends of the top plate in the first direction and extend downward, the top plate and the two second side plates cooperate to form the upper box body with openings at both ends in the first direction, wherein the lower end of the second side plate is connected to the first connecting part, and the two first side plates respectively cover the two side openings of the upper box body in the first direction.

[0044] According to the box body of the utility model, by setting the lower box body of the first aspect mentioned above, the lower box body is provided with two first side panels, the lower end of the first side panel is fully welded to one end of the bottom plate in the first direction, and the two side edges of the bottom plate in the second direction form a first connecting part fixed to the upper box body, so that the lower box body can be processed and formed relatively easily, and the production of the lower box body is more flexible and convenient with lower production cost.

[0045] A battery pack according to a third aspect of the utility model includes a box according to the second aspect of the utility model.

[0046] According to the battery pack of the utility model, by setting the box body of the second aspect mentioned above, the box body is provided with two first side panels, the lower end of the first side panel is fully welded to one end of the bottom plate in the first direction, and the two side edges of the bottom plate in the second direction form a first connecting portion fixed to the upper box body, so that the lower box body can be processed and formed relatively easily, and the production of the lower box body is more flexible and convenient with lower production cost.

[0047] The electrical device according to the fourth aspect of the utility model comprises the battery pack according to the third aspect of the utility model.

[0048] According to the electric device of the utility model, by setting the battery pack of the third aspect mentioned above, two first side panels are provided in the battery pack, the lower end of the first side panel is fully welded to one end of the bottom plate in the first direction, and the two side edges of the bottom plate in the second direction form a first connection portion fixed to the upper box body, so that the lower box body can be processed and formed relatively easily, and the production of the lower box body is more flexible and convenient with lower production cost.

[0049] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a schematic diagram of an electrical device according to an embodiment of the utility model;

[0051] Figure 2 is a schematic diagram of a battery pack according to an embodiment of the utility model;

[0052] Figure 3 is a schematic diagram of a lower box according to an embodiment of the utility model;

[0053] Figure 4 is a partial schematic diagram of the lower box at another angle according to an embodiment of the utility model;

[0054] Figure 5 is an exploded schematic diagram of a lower box according to an embodiment of the utility model;

[0055] Figure 6 yes Figure 5 An enlarged schematic diagram of the local area shown in A.

[0056] Reference numerals:

[0057] 10. Lower box; 101. Avoidance hole;

[0058] 11. bottom plate; 111. supporting plate portion; 112. first connecting edge; 113. first connecting nut;

[0059] 12, first side plate; 121, connecting flange; 122, second connecting edge; 123, second connecting nut;

[0060] 13. Reinforcement structure; 131. First reinforcement member; 1311. First plate portion; 1312. Second plate portion; 1313. First folded edge; 1314. Second folded edge; 132. Second reinforcement member; 14. Water cooling structure;

[0061] 20. upper box body; 21. top plate; 22. second side plate;

[0062] 30. Seals;

[0063] 100, box body;

[0064] 1000, battery pack; 2000, controller; 3000, motor;

[0065] 10000. Electrical equipment. DETAILED DESCRIPTION

[0066] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by technicians in the technical field to which the present invention belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" in the specification and claims of the present invention and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0068] In the description of the embodiments of the present utility model, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present utility model, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0069] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0070] In the description of the embodiments of the present utility model, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0071] In the description of the embodiments of the present invention, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0072] In the description of the embodiments of the present invention, the orientations or positional relationships indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present invention and simplifying the description. They do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present invention.

[0073] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0074] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0075] The case of a battery pack generally consists of an upper case and a lower case. The lower case generally has four side panels and a bottom plate. The four side panels are formed around the sides of the bottom plate and are integrally formed with the bottom plate. However, for battery packs used in narrow installation spaces, in order to maintain a good energy density of the battery pack and meet the need for lightweight, the bottom plate of the lower case often needs to be designed to be more complex, which makes it more difficult to manufacture the battery pack as a whole, increases production costs, and makes it difficult to form the lower case.

[0076] Based on the above considerations, in order to facilitate the processing and forming of the lower box body and reduce the production cost of the lower box body, the utility model designs a lower box body, which includes a bottom plate and two side plates. The two side plates and the bottom plate are welded to form a lower box body structure, which reduces the molding difficulty of the lower box body, makes the processing and manufacturing of the lower box body easier, and facilitates molding, thereby reducing the production cost of the lower box body.

[0077] The box of the battery pack is used to accommodate multiple battery cells of the battery pack or multiple battery modules composed of multiple battery cells. The battery cells can be used as power supply devices, or various energy storage systems using batteries as energy storage elements. The power supply devices can be but not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. 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, etc., and spacecraft can include airplanes, rockets, space shuttles and spacecraft, etc.

[0078] For the convenience of description, the following description will be made by taking a vehicle as an example of an electrical device 10000 according to an embodiment of the utility model.

[0079] refer to Figure 1 As shown, Figure 1 It is a schematic diagram of an electric device 10000 according to an embodiment of the utility model. The vehicle 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 pack 1000 is arranged inside the vehicle, and the battery pack 1000 can be arranged at the bottom, head or tail of the vehicle. The battery pack 1000 can be used to power the vehicle. For example, the battery pack 1000 can be used as an operating power source for the vehicle. The vehicle can also include a controller 2000 and a motor 3000. The controller 2000 is used to control the battery pack 1000 to power the motor 3000, for example, for the starting, navigation and driving power requirements of the vehicle.

[0080] In some embodiments of the present invention, the battery pack 1000 can be used 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.

[0081] Reference below Figure 2-Figure 6 The lower box body 10 according to the first embodiment of the utility model is described. Figure 2 is a schematic diagram of a battery pack 1000 according to an embodiment of the present utility model; Figure 3 is a schematic diagram of the lower box 10 according to an embodiment of the utility model; Figure 4 is a partial schematic diagram of the lower box body 10 at another angle according to an embodiment of the utility model; Figure 5 is an exploded schematic diagram of the lower box body 10 according to an embodiment of the utility model; Figure 6 yes Figure 5 An enlarged schematic diagram of the local area shown in A.

[0082] like Figure 2-Figure 6As shown, the lower box body 10 according to the first embodiment of the utility model is used for a battery pack 1000, and the lower box body 10 includes: a bottom plate 11 and a first side plate 12. The bottom plate 11 is arranged along a first direction in a horizontal plane (such as Figure 2 The bottom plate 11 extends in a second direction in the horizontal plane (such as Figure 2 The first side panels 12 are provided with first connecting portions on both sides of the left and right directions (shown in the figure), and the first connecting portions are used to connect the upper box body 20 of the battery pack 1000. The first direction intersects with the second direction. There are two first side panels 12, which are arranged at both ends of the bottom plate 11 in the first direction, respectively. The first side panels 12 are vertically (as shown in the figure). Figure 2 The lower end of the first side plate 12 is fully welded to the bottom plate 11.

[0083] The bottom plate 11 is used to support and protect the various electrical components, electrical connectors and battery cells in the battery pack 1000. The bottom plate 11 can be composed of multiple layers of sheet metal. The material of the bottom plate 11 can be made of high-strength materials such as aluminum alloy, steel, and stainless steel. The first connecting part on the bottom plate 11 can be a connecting column, a connecting hole, a connecting boss, a connecting slot, and the like.

[0084] In this embodiment, the first direction intersects with the second direction, which may mean that the first direction is not parallel to the second direction, for example, the first direction and the second direction may form a certain angle, or the first direction may be perpendicular to the second direction. In this embodiment, the first connecting portion is used to connect the upper box body 20 of the battery pack 1000, and the first connecting portion can be connected and assembled with the upper box body 20 by riveting, screwing, welding, etc. The first side panel 12 is located at both ends of the bottom plate 11 in the first direction and is vertically arranged. The lower end of the first side panel 12 is connected to the bottom plate 11. When the upper box body 20 is assembled with the lower box body 10, the upper box body 20 is connected to the edges of the bottom plate 11 on both sides in the second direction. The upper box body 20 can cooperate with the two first side panels 12 and the bottom plate 11 to form a receiving cavity structure for accommodating battery cells and other components between the bottom plate 11 and the two first side panels 12. The first side panel 12 can be made of the same material as the bottom plate 11, and the first side panel 12 can be integrally formed or welded. The first side plate 12 is arranged at both ends of the bottom plate 11 along the first direction. The length dimension of the first side plate 12 in the second direction can be the same as the length dimension of the bottom plate 11 in the second direction. The vertical extension dimension of the first side plate 12 can be determined according to the design requirements of the battery pack 1000.

[0085] The structure of the lower box body 10 formed by the two first side panels 12 and the bottom panel 11 can be formed into a U-shape on a projection plane perpendicular to the second direction. In the second direction, both sides of the lower box body 10 are open, which can facilitate the assembly of battery cells and electrical connectors in the battery pack 1000. The lower box body 10 has a simple structure and a light weight, thereby greatly improving the weight energy density of the battery pack 1000.

[0086] The lower end of the first side plate 12 is fully welded to the bottom plate 11. Specifically, in the second direction, a continuous weld can be formed between the lower end of the first side plate 12 and the bottom plate 11. When the lower box body 10 is processed and manufactured, the bottom plate 11 and the first side plate 12 can be processed and manufactured separately, and the processed bottom plate 11 and the first side plate 12 are fully welded and fixed to each other, thereby producing the lower box body 10 of the battery pack 1000.

[0087] In this embodiment, the two first side panels 12 of the lower box 10 are separately provided with the bottom panel 11 and are formed by welding, so that the lower box 10 is easier to manufacture and the manufacturing cost of the lower box 10 is lower. The lower end of the first side panel 12 is fully welded to the bottom panel 11, so that the accommodating cavity formed by the lower box 10 and the upper box 20 after assembly has good sealing at the position where the lower end of the first side panel 12 is connected to the bottom panel 11, so that the battery cells and electrical connectors in the battery pack 1000 are well sealed and protected in the accommodating cavity, so that the operation of the battery pack 1000 is more stable and reliable.

[0088] In this embodiment, the bottom plate 11 is provided with first connecting parts on both side edges in the second direction, which can facilitate connection and assembly with the upper box body 20. It can be understood that the multiple battery cells, electrical connectors and other components in the battery pack 1000 are generally fixed on the bottom plate 11 of the lower box body 10 during assembly, and the bottom plate 11 plays the main supporting and fixing role. The bottom plate 11 requires a higher structural strength, while the first side plate 12 of the battery pack 1000 and the upper box body 20 structure bear a smaller supporting and fixing role. The first side plate 12 and the upper box body 20 can be set to a lower structural strength during design and manufacturing to achieve the effect of reducing the weight of the battery pack 1000 and improving the weight energy density of the battery pack 1000. In this embodiment, the first side plate 12 and the bottom plate 11 are processed and manufactured separately, so that when the lower box body 10 is designed and manufactured, the first side plate 12 and the bottom plate 11 can be designed for structural strength separately as needed, so that the production and manufacturing of the first side plate 12 and the bottom plate 11 can be more flexible and convenient, and thus the production and manufacturing of the lower box body 10 is easier and more convenient.

[0089] In this embodiment, two first side panels 12 are provided in the lower box 10 to cooperate with the upper box 20 to form a vertical plate structure surrounding the bottom plate 11 to cooperate with the bottom plate 11 to form a receiving cavity, so that the structure of the lower box 10 is simplified, thereby further reducing the difficulty of processing and manufacturing the lower box 10 to a certain extent, making the production and manufacturing of the lower box 10 faster and more convenient, and the production efficiency is higher. It can be understood that during the use of the battery pack 1000, the battery cells in the battery pack 1000 will expand in the thickness direction. In this embodiment, the first side panels 12 are respectively provided at both ends of the bottom plate 11 along the first direction, and the first side panels 12 are welded to the bottom plate 11, so that after the battery pack 1000 is assembled, when the thickness direction of the battery cells is consistent with the first direction, the two first side panels 12 can better cooperate to suppress the expansion of the battery cells, so that the battery pack 1000 can operate more stably and reliably.

[0090] According to the lower box body 10 of the embodiment of the utility model, by setting two first side panels 12, the lower ends of the first side panels 12 are fully welded to one end of the bottom plate 11 in the first direction, so that the lower box body 10 can be easily processed and formed, and the production of the lower box body is more flexible and convenient with lower production costs.

[0091] In some embodiments of the present invention, Figure 4 As shown, a connecting flange 121 extending along a first direction toward the bottom plate 11 may be formed at the lower end of the first side plate 12 , and the connecting flange 121 is overlapped with the bottom plate 11 and welded.

[0092] The connecting flange 121 extends toward the bottom plate 11 along the first direction. Since the first side plate 12 is arranged vertically, an angle may be formed between the first side plate 12 and the connecting flange 121. The connecting flange 121 may be a flange structure extending horizontally, or may be formed as a flange structure extending upward or downward in the first direction. The connecting flange 121 overlaps the bottom plate 11, and the connecting flange 121 may partially overlap or completely overlap the bottom plate 11 in the second direction.

[0093] When the connecting flange 121 partially overlaps the bottom plate 11, the overlapping portion of the connecting flange 121 and the bottom plate 11 is arranged vertically stacked and welded with the bottom plate 11, and the remaining portion of the connecting flange 121 can abut against and be welded with the bottom plate 11 in the first direction. When the connecting flange 121 and the bottom plate 11 are completely overlapped, the connecting flange 121 can be arranged vertically stacked with the bottom plate 11 all the way in the second direction. After the connecting flange 121 and the bottom plate 11 are welded, a continuous weld can be formed in the second direction, and the connecting flange 121 can be partially or completely on the upper surface of the bottom plate 11 in the first direction.

[0094] In this embodiment, a connecting flange 121 is formed at the lower end of the first side panel 12 to overlap and weld the bottom panel 11, so that the first side panel 12 can be connected and fixed to the bottom panel 11 more conveniently and reliably. The first side panel 12 overlaps the bottom panel 11, so that the bottom panel 11 can better support and fix the first side panel 12, and the connection and fixation between the first side panel 12 and the bottom panel 11 is more stable and reliable. The connecting flange 121 forms an angle with the vertically extending structure of the first side panel 12, so that the lower end of the first side panel 12 has better structural strength, thereby greatly improving the overall structural strength of the first side panel 12 and making the connection and fixation between the first side panel 12 and the bottom panel 11 more stable and reliable.

[0095] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, a connecting flange 121 extending along a first direction toward the bottom plate 11 may be formed at the lower end of the first side plate 12, and the connecting flange 121 is welded to the bottom plate 11. A second connecting edge 122 extending along the first direction is formed around the first side plate 12. The second connecting edge 122 extends along the circumference of the first side plate 12 and both ends are respectively connected to the two ends of the connecting flange 121 in the second direction. A plurality of second connecting holes are formed on the second connecting edge 122, and the plurality of second connecting holes are arranged at intervals along the circumference of the first side plate 12. The second connecting edge 122 is connected to the upper box body 20 by fasteners passing through the second connecting holes.

[0096] The second connecting edge 122 can be integrally formed with the first side panel 12 and the connecting flange 121. For example, the second connecting edge 122 can be integrally formed with the first side panel 12 and the connecting flange 121 by sheet metal stamping. The length dimension of the second connecting edge 122 in the first direction can be greater than, less than or equal to the length dimension of the connecting flange 121 in the first direction. The length dimension of the second connecting edge 122 in the first direction can be set as needed.

[0097] When the lower box 10 is connected and fixed to the upper box 20, the upper box 20 is connected and fixed to the second connecting edge 122 on the circumference of the first side plate 12 by fasteners. Specifically, the upper box 20 is overlapped and connected with the portion of the second connecting edge 122 extending vertically in the second direction, and the upper box 20 is overlapped and connected with the portion of the second connecting edge 122 extending in the second direction. There are multiple second connecting holes, for example, there can be three, four, five, six, seven, eight, etc. The second connecting holes can be evenly spaced or unequally spaced on the second connecting edge 122 along the circumference of the first side, and the setting position of the second connecting hole can be reasonably set according to the connection and fixation needs of the lower box 10 and the upper box 20.

[0098] In this embodiment, a second connecting edge 122 is formed on the first side plate 12 to connect with the upper box body 20, which has a simple structure. The second connecting edge 122 can make the structural strength of the first side plate 12 higher, so that the first side plate 12 can be more stably connected and fixed to the upper box body 20, and can better suppress the expansion of the battery cells in the battery pack 1000, so that the stability of the battery pack 1000 is better. The first side plate 12 adopts a flange structure, which can make the first side plate 12 lighter in weight while having better structural strength, so that the weight of the lower box body 10 can be reduced, thereby improving the weight energy density of the battery pack 1000.

[0099] A connecting flange 121 and a second connecting edge 122 are formed in the circumferential direction of the first side plate 12, so that the connecting flange 121 and the second connecting edge 122 can enclose a cavity on the side of the first side plate 12 facing the bottom plate 11. After the lower box body 10 and the upper box body 20 are connected and fixed, the cavity enclosed by the connecting flange 121 and the second connecting edge 122 forms a part of the accommodating cavity in the box body 100, and the battery cells, electrical connectors and other components in the accommodating cavity can be installed and arranged using the cavity, so that the battery pack 1000 can have a larger accommodating cavity space with the same volume, and then more battery cells can be arranged in the battery pack 1000, so that the energy density of the battery pack 1000 can be greatly improved.

[0100] In this embodiment, by forming a second connecting edge 122 extending along the first direction toward the bottom plate 11 on the circumference of the first side plate 12, the connection and fixation between the lower box body 10 and the upper box body 20 can be more convenient and stable, and the box body 100 structure formed by the lower box body 10 and the upper box body 20 has a larger accommodating cavity space, thereby improving the energy density of the battery pack 1000 to a certain extent.

[0101] In one embodiment of the present invention, reference Figure 3-Figure 6 As shown, the two ends of the bottom plate 11 in the first direction may be provided with supporting plate portions 111 , and the connecting flanges 121 are supported on the upper side surfaces of the supporting plate portions 111 and connected to the supporting plate portions 111 .

[0102] The upper surface of the support plate portion 111 can be matched with the shape of the lower surface of the connecting flange 121. When the first side plate 12 is connected and fixed to the bottom plate 11, the connecting flange 121 of the first side plate 12 abuts against the upper surface of the support plate portion 111 and is appropriately positioned. The connecting flange 121 and the support plate portion 111 are fully welded along the second direction, thereby connecting and fixing the first side plate 12 to the bottom plate 11.

[0103] In this embodiment, a support plate portion 111 is provided on the bottom plate 11 and is connected with the connecting flange 121 , so that the connection and fixation between the first side plate 12 and the bottom plate 11 can be more stable and reliable, thereby making the molding of the lower box body 10 more convenient and easy.

[0104] In some embodiments of the present invention, reference Figure 3 and Figure 4 As shown, at least one of the bottom plate 11 and the first side plate 12 may be provided with a positioning structure, and the positioning structure is used to position the first side plate 12 on the bottom plate 11, and the positioning structure is formed as a positioning hole, a positioning column and / or a positioning surface.

[0105] At least one of the bottom plate 11 and the first side plate 12 is provided with a positioning structure, for example, the bottom plate 11 may be provided with a positioning structure, or the first side plate 12 may be provided with a positioning structure, or both the bottom plate 11 and the first side plate 12 may be provided with positioning structures, and the positioning structure may be one or more of a positioning hole, a positioning column, and a positioning surface. For example, when the bottom plate 11 is provided with a positioning hole, a corresponding positioning column may be provided on the first side plate 12 to cooperate with the positioning hole, when a positioning surface is formed on the bottom plate 11, a corresponding matching surface may be formed on the first side plate 12, or the bottom plate 11 may be provided with a positioning structure formed by a combination of a positioning hole and a positioning column, a positioning hole and a positioning surface, or a positioning column and a positioning surface, etc. When the bottom plate 11 is assembled and connected with the first side plate 12, the first side plate 12 is assembled into place with the bottom plate 11 through the positioning structure, so as to facilitate the welding of the first side plate and the bottom plate. The specific structural form and arrangement quantity of the positioning structure can be determined as needed.

[0106] In this embodiment, a positioning structure is provided on at least one of the bottom plate 11 and the first side plate 12 so that the first side plate 12 and the bottom plate 11 can be positioned and assembled more conveniently and quickly, thereby making it easier to assemble the bottom plate 11 and the first side plate 12 and making the production efficiency of the lower box body 10 higher.

[0107] In some embodiments of the present invention, Figure 3 As shown, both side edges of the bottom plate 11 in the second direction may be formed with a first connecting edge 112 extending vertically, a first connecting portion is formed on the first connecting edge 112, the first connecting portion is formed as a first connecting hole and passes through the first connecting edge 112 along the second direction, there are multiple first connecting holes, and the multiple first connecting holes are arranged at intervals along the first direction, and the first connecting edge 112 is connected to the upper box body 20 by fasteners passing through the first connecting holes.

[0108] The bottom plate 11 forms a first connecting edge 112 extending vertically on both sides of the second direction. That is, the first connecting edge 112 has a certain width in the vertical direction. When the upper box body 20 and the lower box body 10 are assembled and fixed, the first connecting edge 112 is provided with a first connecting edge 112 extending vertically. Figure 2 and Figure 4As shown, the side surface of the upper box body 20 extending vertically is overlapped and abutted with the first connecting edge 112 in the second direction, and the fastener passes through the first connecting hole on the first connecting edge 112 to connect the bottom plate 11 to the upper box body 20. There are multiple first connecting holes, for example, there can be three, four, five, six, seven, etc.

[0109] In this embodiment, the first connecting portion is formed on the vertically extending first connecting edge 112 and is formed as a connecting hole. The bottom plate 11 and the upper box body 20 are connected and fixed by a fastener passing through the connecting hole along the second direction. The size of the fastener and the first connecting hole has little effect on the length dimension of the bottom plate 11 in the second direction.

[0110] Specifically, since the first connecting hole is formed on the vertically extending first connecting edge 112, the aperture size of the first connecting hole will not lead to an increase in the length dimension of the bottom plate 11 in the second direction during processing and manufacturing. The bottom plate 11 can omit the flange structure extending outward along the second direction, so that the lower box body 10 structure formed by assembling the bottom plate 11 and the first side plate 12 can have a more compact overall structure in the second direction, thereby making the box body 100 structure formed by assembling the lower box body 10 and the upper box body 20 can better utilize the layout space. Within the same spatial range in the second direction, the lower box body 10 and the upper box body 20 can cooperate to accommodate more battery cells, thereby greatly improving the space utilization in the battery pack 1000 to a certain extent, and making the battery pack 1000 have a higher energy density.

[0111] In this embodiment, the first connecting edge 112 is arranged to extend vertically and a first connecting hole is arranged on the first connecting edge 112, and the upper box body 20 and the lower box body 10 are connected and fixed by fasteners passing through the first connecting hole along the second direction. After the lower box body 10 and the upper box body 20 are assembled, the overall structure is more compact and the layout space can be better utilized, so that the battery pack 1000 can be installed and arranged more conveniently in scenarios where the installation space is small, and the battery pack 1000 can have a higher energy density.

[0112] In one embodiment of the present invention, Figure 4 As shown, a first connecting nut 113 may be embedded in the first connecting hole.

[0113] The first connecting nut 113 is embedded in the first connecting hole. The first connecting nut 113 can be a rivet nut. The first connecting nut 113 is fixed to the first connecting hole by riveting. When the lower box 10 and the upper box 20 are assembled and fixed, the fastener can extend from the outside of the upper box 20 into the first connecting hole and screw with the first connecting nut 113, so as to screw and fix the upper box 20 to the bottom plate 11. Optionally, the first connecting nut 113 can also be an ordinary hexagonal nut. The first connecting nut 113 can be fixed to the position of the first connecting hole by welding. The first connecting nut 113 can be set on the side surface of the first connecting edge 112 facing the bottom plate 11 along the second direction.

[0114] In this embodiment, a first connecting nut 113 is embedded in the position of the first connecting hole, so that when the lower box body 10 and the upper box body 20 are assembled and fixed, a fastener can be extended from the outside into the first connecting hole and cooperate with the first connecting nut 113 to screw the lower box body 10 and the upper box body 20, making the connection and fixation of the lower box body 10 and the upper box body 20 more convenient and easy.

[0115] In one embodiment of the present invention, Figure 5 and Figure 6 As shown, the first connecting edge 112 can be formed by bending the two side edges of the bottom plate 11 in the second direction upward.

[0116] When manufacturing the first connecting edge 112 , the bottom plate 11 can be processed in a bending machine to bend the two side edges of the bottom plate 11 in the second direction upward, and the vertical length of the first connecting edge 112 can be set according to actual assembly requirements.

[0117] In this embodiment, the first connecting edge 112 is formed by bending, which has a simple structure and is easy to process, making the processing of the bottom plate 11 relatively convenient and easy. The first connecting edge 112 is formed by bending on the bottom plate 11, so that the structural strength of the bottom plate 11 on both sides in the second direction can be well strengthened and improved. When the lower box 10 and the upper box 20 are assembled, the lower box 10 can be more stably and securely connected and fixed to the upper box 20 through the first connecting edge 112. The overall structural strength of the bottom plate 11 is well improved, and to a certain extent, the bottom plate 11 can reduce a certain weight while maintaining good structural strength, thereby meeting the need for lightweighting and improving the weight energy density of the battery pack 1000 to a certain extent.

[0118] In some embodiments of the present invention, Figure 5 As shown, the lower box body 10 may further include: a reinforcing structure 13 , which is connected to the bottom plate 11 and arranged on the lower side of the bottom plate 11 .

[0119] The reinforcing structure 13 may be a reinforcing plate, reinforcing ribs, reinforcing beams or the like. The reinforcing structure 13 may be manufactured using a material with higher strength. The reinforcing structure 13 may be reasonably arranged according to the support requirements of various components in the battery pack 1000 at different positions of the bottom plate 11 .

[0120] In this embodiment, a reinforcing structure 13 is provided on the bottom plate 11, so that the overall structural strength of the bottom plate 11 can meet the support and fixation requirements in the battery pack 1000. When the bottom plate 11 is designed and manufactured, the structure of the bottom plate 11 can be flexibly and conveniently adjusted and optimized in conjunction with the arrangement of the reinforcing structure 13, thereby reducing the structural strength requirements of the bottom plate 11 to a certain extent, making the structure of the bottom plate 11 simpler and using less material, thereby reducing the difficulty of processing and manufacturing the bottom plate 11 and the overall structural weight of the bottom plate 11 and the reinforcing structure 13, making the production of the lower box 10 easier, more convenient and less costly.

[0121] In an embodiment of the present invention, the reinforcement structure 13 may be connected to the bottom plate 11 by welding.

[0122] The reinforcing structure 13 is connected to the bottom plate 11 by welding. For example, the reinforcing structure 13 can be connected to the bottom plate 11 by spot welding, full welding, high frequency welding or the like.

[0123] In this embodiment, the reinforcing structure 13 is welded to the bottom plate 11 , which is convenient and reliable, so that the reinforcing structure 13 and the bottom plate 11 are connected stably and firmly.

[0124] In one embodiment of the present invention, Figure 5 As shown, the reinforcement structure 13 may be a frame structure and includes: a first reinforcement member 131 and a second reinforcement member 132. There are two first reinforcement members 131, the two first reinforcement members 131 extend along the first direction and are arranged at intervals in the second direction; the second reinforcement member 132 extends along the second direction and has two ends connected to the two first reinforcement members 131 respectively.

[0125] The first reinforcement 131 can be a sheet metal stamping part. The material of the first reinforcement 131 can be manufactured using the same material as the base plate 11. In this embodiment, the first reinforcement 131 extends along the first direction. Specifically, the first reinforcement 131 can extend to both ends of the base plate 11 in the first direction. The first reinforcement 131 can be arranged at the edge of the base plate 11 in the second direction. The first reinforcement 131 can also be arranged between the two side edges of the base plate 11 in the second direction. The first reinforcement 131 can be integrally formed or spliced.

[0126] The second reinforcement 132 can be a sheet metal stamping part. The material of the second reinforcement 132 can be the same as that of the first reinforcement 131. The second reinforcement 132 can be integrally formed or spliced. The second reinforcement 132 and the first reinforcement 131 can be connected by welding. The second reinforcement 132 and the first reinforcement 131 can also be integrally formed.

[0127] In this embodiment, the reinforcement structure 13 is set as a frame structure, which is light in weight, has good structural strength, and uses less material, so that the overall structure weight of the lower box body 10 is light, thereby improving the weight energy density of the battery pack 1000 to a certain extent. In this embodiment, a first reinforcement member 131 extending along the first direction and a second reinforcement member 132 extending along the second direction are provided. The first reinforcement member 131 cooperates with the second reinforcement member 132 to play a good structural reinforcement role for the bottom plate 11 in the first direction and the second direction, so that the bottom plate 11 can be more stably and reliably supported and fixed after being connected and fixed to the reinforcement structure 13.

[0128] In some examples of the present invention, Figure 5 As shown, there may be a plurality of second reinforcement members 132 , and the plurality of second reinforcement members 132 are arranged at intervals along the first direction.

[0129] For example, the number of the second reinforcement members 132 may be two, three, four, five, six, etc. The plurality of second reinforcement members 132 may be evenly spaced along the second direction, or may be arranged at different intervals along the second direction. The arrangement positions of the second reinforcement members 132 in the second direction may be reasonably and flexibly arranged according to the reinforcement requirements of the bottom plate 11.

[0130] In this embodiment, a plurality of second reinforcement members 132 are provided and arranged along the first direction, so that the second reinforcement members 132 can more comprehensively cover the extension range of the bottom plate 11 in the first direction, so that the bottom plate 11 can obtain stable and reliable structural reinforcement, and the overall structural distribution of the reinforcement structure 13 and the bottom plate 11 can be more uniform and reasonable.

[0131] In some examples of the present invention, Figure 6 As shown, the first reinforcement 131 may include: a first plate portion 1311 and a second plate portion 1312, the first plate portion 1311 is vertically arranged, the second plate portion 1312 is connected to the lower end of the first plate portion 1311 and extends along the second direction toward the second reinforcement 132 until it is connected to the second reinforcement 132, and the bottom plate 11 is arranged between the two first plate portions 1311 of the two first reinforcements 131.

[0132] The first plate portion 1311 is arranged vertically, and the vertical length dimension of the first plate portion 1311 can match the vertical length dimension of the first connecting edge 112 of the bottom plate 11. Specifically, the upper end surface of the first plate portion 1311 can be higher, equal to, or lower than the upper end surface of the first connecting edge 112. The length dimension of the second plate portion 1312 extending along the second direction can be set according to the reinforcement requirements of the bottom plate 11. The first reinforcement member can be formed by bending a whole piece of metal plate to form the first plate portion 1311 and the second plate portion 1312, or the first plate portion 1311 and the second plate portion 1312 can be independent plate structures and the first reinforcement member 131 is formed by welding.

[0133] In this embodiment, the first plate portion 1311 is vertically arranged, and the second plate portion 1312 extends along the second direction toward the second reinforcement 132, and an angle is formed between the first plate portion 1311 and the second plate portion 1312. When the bottom plate 11 is connected and fixed to the first reinforcement 131, the bottom of the bottom plate 11 on both sides of the second direction is supported on the upper surface of the second plate portion 1312, and the first connecting edge 112 formed on both sides of the bottom plate 11 in the second direction is stacked with the first plate portion 1311 in the second direction.

[0134] In this embodiment, the first reinforcement member 131 includes a first plate portion 1311 arranged vertically and a first plate portion 1311 extending along the second direction. The first plate portion 1311 and the second plate portion 1312 are used to reinforce the bottom and the edges on both sides of the bottom plate 11 in the second direction, so that the first connecting edge 112 of the bottom plate 11 can be well structurally reinforced, so that the connection and fixation of the bottom plate 11 with the upper box body 20 is more stable and reliable when assembled and fixed.

[0135] In one example of the present invention, Figure 6 As shown, the end of the second plate portion 1312 facing away from the first plate portion 1311 can be formed with a first folded edge 1313 extending upward, and a groove is defined between the first folded edge 1313 and the first plate portion 1311. The two side edges of the bottom plate 11 in the second direction are formed with first connecting edges 112 extending vertically, the first connecting edge 112 is arranged in the groove, and the first connecting portion is formed on the first connecting edge 112.

[0136] An end of the second plate portion 1312 that faces away from the first plate portion 1311 is formed with a first folded edge 1313 that extends upward, that is, an end of the second plate portion 1312 that is connected to the second reinforcement 132 is formed with a first folded edge 1313, and the first folded edge 1313 extends upward and is connected to the second reinforcement 132, and the first folded edge 1313 cooperates with the first plate portion 1311 and the second plate portion 1312 to define a groove.

[0137] In this embodiment, the second plate portion 1312 is formed with a first folded edge 1313 which cooperates with the first plate portion 1311 to define a groove, so that when the base plate 11 and the reinforcement structure 13 are connected and fixed, the first connecting edge 112 can be positioned and matched in the groove more quickly and conveniently, thereby facilitating the assembly connection between the base plate 11 and the reinforcement structure 13.

[0138] In some specific embodiments of the present invention, Figure 6 As shown, a plurality of avoidance holes 101 penetrating the first plate portion 1311 along the second direction may be formed on the first plate portion 1311, the plurality of avoidance holes 101 correspond one-to-one to the plurality of first connection portions, and the avoidance holes 101 and the corresponding first connection portions are opposite to each other in the second direction so that the first connection portions are exposed.

[0139] The shape of the avoidance hole 101 can be matched with the shape of the first connecting part. When the lower box body 10 and the upper box body 20 are assembled, the first connecting part formed on the bottom plate 11 leaks out from the avoidance hole 101 along the second direction, and the fastener cooperates with the first connecting part from the outside of the first plate portion 1311 to fix the upper box body 20 and the bottom plate 11, thereby assembling and fixing the lower box body 10 and the upper box body 20.

[0140] In this embodiment, a plurality of avoidance holes 101 corresponding to the first connection parts are arranged on the first plate part 1311 , so as to facilitate the cooperation between the first connection part on the bottom plate 11 and the fastener.

[0141] In some specific embodiments of the present invention, Figure 6 As shown, a second folded edge 1314 extending away from the first plate portion 1311 along a second direction may be formed at the upper end of the first folded edge 1313 , and the second folded edge 1314 is overlapped with the upper side surface of the second reinforcement 132 .

[0142] The second folded edge 1314 extends along the second direction toward the second reinforcement 132. When the first reinforcement 131 and the second reinforcement 132 are welded and fixed, the second folded edge 1314 overlaps the upper surfaces of multiple second reinforcements 132 and is welded to the second reinforcement 132. The length dimension of the second folded edge 1314 in the second direction can be reasonably set according to the needs of welding and fixing.

[0143] In this embodiment, by forming a second folded edge 1314 extending along the second direction at the upper end of the first folded edge 1313, the structural strength of the second plate portion 1312 can be improved, so that the first reinforcement 131 can play a better structural reinforcement role for the bottom plate 11. To a certain extent, the first reinforcement 131 can use less material during design and manufacturing, thereby better meeting the need for lightweighting the lower box body 10. The second folded edge 1314 can be provided so that the first reinforcement 131 and the second reinforcement 132 have a good matching overlap surface when they are connected and fixed, making the connection and fixation of the first reinforcement 131 and the second reinforcement 132 more convenient and stable.

[0144] In some examples of the present invention, both the first reinforcement member 131 and the second reinforcement member 132 may be sheet metal members.

[0145] The first reinforcement 131 and the second reinforcement 132 can be made of metal plates such as steel plates and aluminum alloys through sheet metal forming methods such as stamping, curling, bending, ironing or laser cutting to form the first plate portion 1311, the second plate portion 1312 and the first folded edge 1313 and the second folded edge 1314 on the first reinforcement 131.

[0146] In this embodiment, the first reinforcement 131 and the second reinforcement 132 are both configured as sheet metal parts, so that the first reinforcement 131 and the second reinforcement 132 are convenient to form, easy to process, and have low manufacturing cost. The first reinforcement 131 and the second reinforcement 132 after processing are light in weight and high in structural strength, thereby playing a good role in structural reinforcement of the bottom plate 11 and meeting the need for lightweighting the lower box 10, thereby greatly improving the weight energy density of the battery pack 1000.

[0147] In one embodiment of the present invention, Figure 6 As shown, a second connecting nut 123 may be embedded in the second connecting hole.

[0148] The second connecting nut 123 is embedded in the second connecting hole, and the second connecting nut 123 can be a rivet nut, and the second connecting nut 123 is fixed to the second connecting hole by riveting. When the lower box 10 and the upper box 20 are assembled and fixed, the fastener extends from the outer side of the upper box 20 into the second connecting hole and is screwed with the second connecting nut 123, so that the upper box 20 and the first side plate 12 are screwed and fixed in the circumferential direction of the first side plate 12. Optionally, the second connecting nut 123 can also be an ordinary hexagonal nut, and the second connecting nut 123 can be fixed to the second connecting hole by welding.

[0149] In this embodiment, a second connecting nut 123 is embedded in the position of the second connecting hole, so that when the lower box body 10 and the upper box body 20 are assembled and fixed, a fastener can be extended from the outside into the second connecting hole and cooperate with the second connecting nut 123 to screw the lower box body 10 and the upper box body 20, making the connection and fixation of the lower box body 10 and the upper box body 20 more convenient and easy.

[0150] In some embodiments of the present invention, Figure 5 As shown, the housing 100 may further include a heat exchange element 14, which is fixed on the bottom plate 11 and located on the upper side of the bottom plate.

[0151] Specifically, the heat exchange element 14 includes a flat tube and a branch tube. There are multiple flat tubes, which extend along a first direction and are arranged at intervals in a second direction. There are two branch tubes, which are respectively arranged at both ends of the flat tube in the first direction, and both ends of the multiple flat tubes are respectively connected to the two branch tubes.

[0152] In this embodiment, a heat exchange component 14 is fixed on the bottom plate 11. The heat exchange component 14 can play a good role in heat dissipation for the battery cells in the battery pack 1000. Fixing the heat exchange component to the bottom plate can make it more convenient and stable to fix the heat exchange component 14 on the bottom plate 11, and make the installation and arrangement of the heat exchange component 14 in the box 100 more convenient and easy.

[0153] Reference below Figure 2-Figure 6 The box 100 according to the second embodiment of the utility model is described.

[0154] like Figure 2-Figure 6 As shown, the box body 100 according to the embodiment of the utility model comprises a lower box body 10 and an upper box body 20 according to the embodiment of the first aspect of the utility model. The upper box body 20 comprises a top plate 21 and a second side plate 22, the second side plates 22 are two, the two second side plates 22 are respectively connected to the two ends of the top plate 21 in the first direction and extend downward, the top plate 21 cooperates with the two second side plates 22 to form an upper box body 20 with openings at both ends in the first direction, wherein the lower end of the second side plate 22 is connected to the first connecting portion, and the two first side plates 12 respectively cover the openings on both sides of the upper box body 20 in the first direction.

[0155] The two second side panels 22 of the upper box body 20 cooperate with the two first side panels 12 of the lower box body 10 to surround the circumference of the bottom plate 11. The first side panel 12, the second side panel 22 and the bottom plate 11 form the main structure of the box body 100 and cooperate with the top plate 21 to form the accommodating cavity of the box body 100. When the lower box body 10 and the upper box body 20 are assembled, the two side openings of the upper box body 20 are respectively connected and fixed with the first side panels 12 by fasteners, and the lower ends of the two second side panels 22 are respectively connected and fixed with the first connecting edges 112 of the bottom plate 11 by fasteners. The top plate 21 and the second side panels 22 can be processed and manufactured by an integral molding method, and the upper box body 20 can be processed and manufactured by plastic, aluminum alloy, steel, stainless steel, etc. Preferably, the upper box body 20 is a plastic part.

[0156] According to the box body 100 of the embodiment of the utility model, by setting the lower box body 10 of the above-mentioned first aspect embodiment, the lower box body 10 is provided with two first side panels 12, and the lower end of the first side panel 12 is fully welded to one end of the bottom plate 11 in the first direction, and the edges on both sides of the bottom plate 11 in the second direction form a first connecting portion fixed to the upper box body 20, so that the lower box body 10 can be processed and formed relatively easily, and the production of the lower box body is more flexible and convenient with lower production cost.

[0157] In some embodiments of the present invention, Figure 2 As shown, the box body 100 may also include a seal 30, which includes a first sealing portion and a second sealing portion, wherein two first sealing portions are provided and are respectively located at both ends of the second sealing portion in the first direction, the first sealing portion extends along the second direction, and two second sealing portions are provided, the two second sealing portions extend along the first direction and are arranged at intervals in the second direction, wherein one of the second sealing portions is respectively connected to one end of the two first sealing portions in the second direction at both ends in the first direction, wherein the other second sealing portion is respectively connected to the other end of the two first sealing portions in the second direction at both ends in the first direction, so that the first sealing portion is connected to the two ends of the second sealing portion in the second direction and forms a ring with the second sealing portion, the first sealing portion is provided between the upper box body 20 and the first connecting edge 112, and the second sealing portion is provided between the upper box body 20 and the second connecting edge 122.

[0158] The sealing member 30 may be a sealant or a sealing gasket, the first sealing portion may be provided on one side of the first connection hole in the up-down direction, or the first sealing portion may cover the vertical surface of the first connection edge 112, the second sealing portion may be provided on one side of the second connection hole in the first direction, or the second sealing portion may cover the surface of the second connection edge 122. Preferably, the sealing member 30 is a sealing gasket.

[0159] In this embodiment, a seal 30 is provided at the connection position between the upper box body 20 and the lower box body 10, which can play a good sealing role on the box body 100, so that the accommodating cavity formed by the lower box body 10 and the upper box body 20 can be reliably sealed, thereby allowing the battery cells and other components in the box body 100 to be in a good operating environment, making the battery pack 1000 operate more stably.

[0160] Reference below Figure 2-Figure 6 A battery pack 1000 according to an embodiment of the third aspect of the utility model is described.

[0161] like Figure 2-Figure 6 As shown, the battery pack 1000 according to the embodiment of the utility model includes the box body 100 according to the embodiment of the second aspect of the utility model.

[0162] Other structures and operations of the box body 100 according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0163] According to the battery pack 1000 of the embodiment of the utility model, the battery pack 1000 is provided with a box body 100 of the above-mentioned second aspect embodiment, and the box body 100 is provided with two first side panels 12. The lower end of the first side panel 12 is fully welded to one end of the bottom plate 11 in the first direction, and the edges on both sides of the bottom plate 11 in the second direction form a first connecting portion fixed to the upper box body 20, so that the lower box body 10 can be processed and formed relatively easily, and the production of the lower box body is more flexible and convenient with lower production cost.

[0164] Reference below Figure 1-Figure 6 An electrical device 10000 according to an embodiment of the fourth aspect of the utility model is described.

[0165] like Figure 1-Figure 6 As shown, the electric device 10000 according to the embodiment of the utility model includes the battery pack 1000 according to the embodiment of the third aspect of the utility model.

[0166] Other structures and operations of the electrical device 10000 according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0167] According to the electrical device 10000 of the embodiment of the utility model, by setting the battery pack 1000 of the above-mentioned third aspect embodiment, two first side panels 12 are provided in the battery pack 1000, and the lower end of the first side panel 12 is fully welded to one end of the bottom plate 11 in the first direction, and the edges on both sides of the bottom plate 11 in the second direction form a first connecting portion fixed to the upper box body 20, so that the lower box body 10 can be processed and formed relatively easily, and the production of the lower box body is more flexible and convenient with lower production cost.

[0168] The following will refer to Figure 1-Figure 6 An electric device 10000 according to a specific embodiment of the present utility model is described.

[0169] like Figure 1-Figure 6 As shown, the electrical device 10000 is a vehicle, which includes a battery pack 1000, a controller 2000 and a motor 3000. The controller 2000 is electrically connected to the motor 3000 and the battery pack 1000, and the battery pack 1000 is electrically connected to the motor 3000.

[0170] The battery pack 1000 includes a box body 100, which is provided with a lower box body 10, an upper box body 20 and a sealing member 30. The lower box body 10 includes two first side panels 12, a bottom plate 11 and a reinforcing structure 13. The bottom plate 11 extends along a first direction. The two first side panels 12 are vertically arranged and respectively arranged at the two ends of the bottom plate 11 in the first direction. The two ends of the bottom plate 11 form a support plate portion 111. The lower end of the first side panel 12 forms a connecting flange 121 extending toward the bottom plate 11 along the first direction. The connecting flange 121 overlaps the support plate portion 111 and is fully welded to the support plate portion 111 in the second direction. The bottom plate 11 forms a first connecting edge 112 on both sides of the second direction. The first connecting edge 112 extends vertically upward. A first connecting hole is formed on the first connecting edge 112. The first connecting hole is provided with a first connecting nut 113. The first connecting nut 113 is a rivet nut. The water cooling structure 14 is fixed to the bottom plate 11.

[0171] The reinforcement structure 13 includes a first reinforcement member 131 and a second reinforcement member 132. The first reinforcement member 131 extends along the first direction and is welded to the first connecting edge 112. The first reinforcement member 131 is provided with an avoidance hole 101 that cooperates with the rivet nut. There are five second reinforcement members 132. The second reinforcement members 132 extend along the second direction and are welded and fixed to the first connecting edge 112 at both ends. The reinforcement structure 13 is welded and fixed to the bottom plate 11.

[0172] A second connecting edge 122 extending in the first direction toward the bottom plate 11 is formed on the circumference of the first side plate 12 . A second connecting hole is provided on the second connecting edge 122 . A second connecting nut 123 is provided in the second connecting hole. The second connecting nut 123 is a rivet nut.

[0173] The upper box body 20 includes a top plate 21 and two second side plates 22, the top plate 21 extends along a first direction, and the top plate 21 extends downward on both sides of the second direction to form the second side plates 22. The sealing member 30 is a sealing ring and is disposed between the upper box body 20 and the first connecting edge 112 and the second connecting edge 122. The water cooling structure 14 is disposed on the bottom plate 11.

[0174] When the lower box body 10 is processed and manufactured, the reinforcing structure 13, the bottom plate 11 and the first side plate 12 are respectively processed and formed and then assembled. The reinforcing structure 13 is welded to the lower side of the bottom plate 11, and the first side plate 12 is respectively welded to the two ends of the bottom plate 11 in the first direction, thereby completing the production of the lower box body 10. This can make the processing and molding of the lower box body 10 simpler and easier, make the production of the lower box body 10 more flexible and convenient, and save production costs.

[0175] When the box body 100 is assembled, the water cooling structure 14 is arranged on the bottom plate 11, and the sealing ring is arranged on the first connecting edge 112 and the second connecting edge 122. The upper box body 20 cooperates with the first connecting edge 112 and the second connecting edge 122 of the lower box body 10 to clamp the sealing ring to form a good seal. The upper box body 20 and the lower box body 10 are threadedly connected by bolts passing through the first connecting hole and the second connecting hole and the rivet nut, so that the upper box body 20 and the lower box body 10 are connected and fastened.

[0176] In this embodiment, the lower box body 10 is provided with two first side panels 12, the lower end of the first side panel 12 is fully welded to one end of the bottom plate 11 in the first direction, and the two side edges of the bottom plate 11 in the second direction form a first connecting portion fixed to the upper box body 20, so that the lower box body 10 can be processed and formed relatively easily, and the production of the lower box body is more flexible and convenient with lower production cost.

[0177] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it; although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and description of the utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The utility model 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 lower box for a battery pack, characterized in that: The lower box body comprises: A bottom plate (11), the bottom plate (11) extending along a first direction in a horizontal plane, first connecting portions being provided on both side edges of the bottom plate (11) in a second direction in the horizontal plane, the first connecting portions being used to connect to an upper box body (20) of a battery pack, the first direction intersecting with the second direction; A first side plate (12), wherein the number of the first side plates (12) is two and the first side plates (12) are respectively arranged at two ends of the bottom plate (11) in the first direction, the first side plates (12) are arranged vertically, and the lower ends of the first side plates (12) are fully welded to the bottom plate (11).

2. The lower box according to claim 1, characterized in that: A connecting flange (121) extending along the first direction toward the bottom plate (11) is formed at the lower end of the first side plate (12), and the connecting flange (121) is overlapped and welded to the bottom plate (11).

3. The lower box according to claim 2, characterized in that: The bottom plate (11) is provided with support plate portions (111) at both ends in the first direction, and the connecting flange (121) is supported on the upper surface of the support plate portion (111) and connected to the support plate portion (111).

4. The lower box according to claim 1, characterized in that: At least one of the bottom plate (11) and the first side plate (12) is provided with a positioning structure, the positioning structure being used to position the first side plate (12) on the bottom plate (11), the positioning structure being formed as a positioning hole, a positioning column and / or a positioning surface.

5. The lower box according to claim 1, characterized in that: The bottom plate (11) is provided with first connecting edges (112) extending vertically on both sides in the second direction, the first connecting portion is formed on the first connecting edge (112), the first connecting portion is formed as a first connecting hole and passes through the first connecting edge (112) in the second direction, the number of the first connecting holes is multiple, the multiple first connecting holes are arranged at intervals in the first direction, and the first connecting edge (112) is connected to the upper box body (20) by fasteners passing through the first connecting holes.

6. The lower box according to claim 5, characterized in that: A first connecting nut (113) is embedded in the first connecting hole.

7. The lower box according to claim 5, characterized in that: The first connecting edge (112) is formed by bending the two side edges of the bottom plate (11) in the second direction upwards.

8. The lower box according to claim 1, characterized in that: The lower box body further comprises: a reinforcing structure (13), wherein the reinforcing structure (13) is connected to the bottom plate (11) and is arranged on the lower side of the bottom plate (11).

9. The lower box according to claim 8, characterized in that: The reinforcement structure (13) is connected to the base plate (11) by welding.

10. The lower box according to claim 8, characterized in that: The reinforcement structure (13) is a frame structure and comprises: A first reinforcement member (131), wherein the number of the first reinforcement members (131) is two, and the two first reinforcement members (131) extend along the first direction and are arranged at intervals in the second direction; A second reinforcement member (132), the second reinforcement member (132) extends along the second direction and has two ends respectively connected to the two first reinforcement members (131).

11. The lower box according to claim 10, characterized in that: There are a plurality of second reinforcement members (132), and the plurality of second reinforcement members (132) are arranged at intervals along the first direction.

12. The lower box according to claim 10, characterized in that: The first reinforcement (131) comprises: a first plate portion (1311) and a second plate portion (1312), the first plate portion (1311) being vertically arranged, the second plate portion (1312) being connected to the lower end of the first plate portion (1311) and extending along the second direction toward the second reinforcement (132) until being connected to the second reinforcement (132), and the bottom plate (11) being arranged between the two first plate portions (1311) of the two first reinforcements (131).

13. The lower box according to claim 12, characterized in that: An end of the second plate portion (1312) that is away from the first plate portion (1311) is formed with a first folded edge (1313) extending upward, and a groove is defined between the first folded edge (1313) and the first plate portion (1311). The bottom plate (11) has first connecting edges (112) extending vertically formed on both sides in the second direction, the first connecting edges (112) are arranged in the groove, and the first connecting portion is formed on the first connecting edges (112).

14. The lower box according to claim 13, characterized in that: A plurality of avoidance holes (101) are formed on the first plate portion (1311) and penetrate the first plate portion (1311) along the second direction. The plurality of avoidance holes (101) correspond one-to-one to the plurality of first connecting portions. The avoidance holes (101) and the corresponding first connecting portions are directly opposite to each other in the second direction so that the first connecting portions are exposed.

15. The lower box according to claim 13, characterized in that: A second folded edge (1314) extending away from the first plate portion (1311) along the second direction is formed at the upper end of the first folded edge (1313), and the second folded edge (1314) is overlapped on the upper surface of the second reinforcement member (132).

16. The lower box according to claim 10, characterized in that: The first reinforcement member (131) and the second reinforcement member (132) are both sheet metal members.

17. The lower box according to claim 1, characterized in that: A connecting flange (121) extending along the first direction toward the bottom plate (11) is formed at the lower end of the first side plate (12), and the connecting flange (121) is welded to the bottom plate (11). A second connecting edge (122) extending along the first direction is formed on the circumference of the first side plate (12), the second connecting edge (122) extending along the circumference of the first side plate (12) and having two ends respectively connected to two ends of the connecting flange (121) in the second direction. A plurality of second connection holes are formed on the second connection edge (122), and the plurality of second connection holes are arranged at intervals along the circumference of the first side plate (12), and the second connection edge (122) is connected to the upper box body (20) by fasteners passing through the second connection holes.

18. The lower box according to claim 17, characterized in that: A second connecting nut (123) is embedded at the position of the second connecting hole.

19. A box, characterized in that: include: The lower box according to any one of claims 1-18; An upper box body (20), the upper box body (20) comprising a top plate (21) and a second side plate (22), the second side plates (22) being two, the two second side plates (22) being respectively connected to two ends of the top plate (21) in the first direction and extending downward, the top plate (21) and the two second side plates (22) cooperate to form the upper box body (20) with two ends opened in the first direction, The lower end of the second side plate (22) is connected to the first connecting portion, and the two first side plates (12) respectively cover the openings on both sides of the upper box body (20) in the first direction.

20. A battery pack, characterized in that: Comprising a housing according to claim 19.

21. An electrical device, characterized in that: Comprising a battery pack according to claim 20.

Images