Box body, battery pack and electric device

Abstract

The utility model provides a box body, a battery pack and an electric device. The box body comprises edge beams, structural beams and welding blocks. The edge beams are outer frames of the box body, and the multiple edge beams are connected end to end to form a containing cavity. The two ends of the structural beam are welded to the two non-collinear edge beams respectively. The welding block comprises a first surface and a second surface. The first face is attached to the boundary beam, and the second face is attached to the structural beam. A first welding seam is arranged between the first face and the edge beam. A second welding seam is arranged between the second face and the structural beam. An operator performs welding on the first welding seam and the second welding seam, so that welding points between the structural beam and the edge beam are increased, the connection strength between the structural beam and the edge beam is improved, and the service life of a battery is prolonged.

Description

Technical Field

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

[0002] The battery pack box is used to store and install battery modules, battery management systems, cooling systems, etc. The structural beams in the battery pack are used to provide structural support.

[0003] In the related art, the structural beam and the side beam are welded, and the excessive load on the structural beam causes the connection between the structural beam and the side beam to fail easily, thereby affecting the service life of the battery. Utility Model Content

[0004] The present application provides a box, a battery pack and an electrical device, which strengthen the connection strength between the structural beam and the side beam, thereby increasing the service life of the battery.

[0005] In a first aspect, the present application provides a box body comprising: side beams, a structural beam, and a welding block. The side beams form the outer frame of the box body, and multiple side beams are connected end-to-end to form a housing cavity. The ends of the structural beam are welded to two non-collinear side beams. The welding block includes a first surface and a second surface. The first surface is aligned with the side beam, and the second surface is aligned with the structural beam. A first weld is provided between the first surface and the side beam. A second weld is provided between the second surface and the structural beam.

[0006] According to the first aspect, a welding block is added to the box. A first surface of the welding block is aligned with the side beam, and a first weld is defined between the first surface and the side beam. A second surface of the welding block is aligned with the structural beam, and a second weld is defined between the second surface and the structural beam. An operator welds on the first and second welds, thereby increasing the number of weld points between the structural beam and the side beam, improving the connection strength between the structural beam and the side beam, and thus extending the service life of the battery.

[0007] In one possible design, the structural beam includes a first connecting surface and a second connecting surface disposed opposite each other. Both the first connecting surface and the second connecting surface are welded to the side beam. Two welding blocks are provided between the side beam and one end of the structural beam. The second surface of one welding block is in contact with the first connecting surface, and the second surface of the other welding block is in contact with the second connecting surface.

[0008] Based on the description of the above embodiment, two welding blocks are provided between the side beam and one end of the structural beam. The second surface of one welding block is aligned with the first connection surface of the structural beam, and the second surface of the other welding block is aligned with the second connection surface of the structural beam. This further improves the connection strength between the structural beam and the side beam, thereby further extending the battery life.

[0009] In a possible design, the welding block may be a block-shaped structure or a plate-shaped structure.

[0010] Based on the description of the above embodiment, the operator can freely select the structural form of the welding block according to conditions such as the size of the installation space in the box, the connection strength requirements between the structural beam and the side beam, etc.

[0011] In a possible design, when the welding block is a block structure, a plurality of first welds are provided between the first surface and the side beam.

[0012] Based on the description of the above embodiment, when the welding block is a block structure, multiple first welds are provided between the first surface and the side beam, which increases the welding points between the structural beam and the side beam, further improves the connection strength between the structural beam and the side beam, and thus further extends the service life of the battery.

[0013] In a possible design, when the welding block is a block structure, a plurality of second welds are provided between the second surface and the structural beam.

[0014] Based on the description of the above embodiment, when the welding block is a block structure, multiple second welds are provided between the second surface and the structural beam, which increases the welding points between the structural beam and the side beam, further improves the connection strength between the structural beam and the side beam, and thus further extends the service life of the battery.

[0015] In a possible design, the top surface of the welding block is lower than the top surface of the edge beam in the first direction. The top surface of the welding block is lower than the top surface of the structural beam in the first direction.

[0016] Based on the description of the above embodiment, the top surface of the welding block is lower than the top surface of the side beam in the first direction, and the top surface of the welding block is lower than the top surface of the structural beam in the first direction, so as to avoid affecting the installation of other components in the box to ensure the normal use of the battery.

[0017] In one possible design, a first positioning assembly is provided between the first surface and the side beam. The first positioning assembly includes a first positioning block and a first positioning groove. The first positioning groove is provided on the first surface, and the first positioning block is provided on the side beam. Alternatively, the first positioning groove is provided on the side beam, and the first positioning block is provided on the first surface. The first positioning block engages with the first positioning groove.

[0018] Based on the description of the above embodiment, a first positioning assembly is provided between the first surface and the side beam, so that the first surface of the welding block is connected to a defined position of the side beam.

[0019] In one possible design, a second positioning assembly is provided between the second surface and the structural beam. The second positioning assembly includes a second positioning block and a second positioning slot. The second positioning slot is provided on the second surface, and the second positioning slot is provided on the structural beam. Alternatively, the second positioning slot is provided on the structural beam, and the second positioning hole is provided on the second surface.

[0020] Based on the description of the above embodiment, a second positioning assembly is provided between the second surface and the structural beam so that the second surface of the welding block is connected to a defined position of the structural beam.

[0021] In a second aspect, the present application provides a device comprising: a battery module, a battery management system, a cooling system, and a housing according to any one of the above embodiments. The housing has a receiving cavity. The battery module, the battery management system, and the cooling system are all disposed in the receiving cavity.

[0022] In a third aspect, the present application provides an electrical device, comprising: the battery pack described in the above embodiment. The battery pack is used to provide electrical energy.

[0023] The beneficial effects of the battery pack provided in the second aspect and the electrical device provided in the third aspect can be referred to the beneficial effects brought about by the first aspect and the various possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 This is a structural diagram of a box in an embodiment of the present application.

[0026] Figure 2 for Figure 1 Magnified view of section A.

[0027] Figure 3 This is a structural schematic diagram of a welding block in an embodiment of the present application.

[0028] Figure 4 This is a structural schematic diagram of a box without welding blocks in an embodiment of the present application.

[0029] Figure 5 for Figure 4 Magnified view of part B.

[0030] Description of reference numerals:

[0031] 100-cabinet;

[0032] 1-side beam;

[0033] 2-structural beam; 21-first connecting surface; 22-second connecting surface;

[0034] 3-welding block; 31-first side; 32-second side;

[0035] 4-first weld; 5-second weld;

[0036] X - first direction. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0039] The terms "comprises", "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0040] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] The term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0042] The directional words appearing in the following description are all directions shown in the drawings and do not limit the specific structure of this application. For example, in the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting this application.

[0043] In addition, the expressions indicating directions such as the X direction, Y direction, and Z direction used to illustrate the operation and construction of the various components of this embodiment are not absolute but relative, and although these indications are appropriate when the various components are in the positions shown in the figures, when these positions are changed, these directions should be interpreted differently to correspond to the changes.

[0044] In addition, the terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more such features.

[0045] In the description of this application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two (including two).

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, "connected" or "connected" in a mechanical structure can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection via a fixing member, such as a screw, bolt, or other fixing member. A physical connection can also be a detachable connection, such as a mutual snap-fit ​​connection. A physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. "Connected" or "connected" in a circuit structure can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate element, as long as the circuit is interconnected. It can also refer to internal communication between two elements. A signal connection can refer to a signal connection through a circuit or a signal connection through a media medium, such as radio waves. Those skilled in the art will understand the specific meanings of the above terms in this application.

[0047] The battery pack box is used to store and install battery modules, battery management systems, cooling systems, etc. The structural beams in the battery pack are used to provide structural support.

[0048] In the related art, the structural beam and the side beam are welded, and the excessive load on the structural beam causes the connection between the structural beam and the side beam to fail easily, thereby affecting the service life of the battery.

[0049] Based on this, the present application provides a box body, which strengthens the connection strength between the structural beam and the side beam by adding a welding block between the side beam and the structural beam, thereby improving the service life of the battery. Figure 1-5 Provide a detailed description.

[0050] In a first aspect, the present application provides a box body 100 comprising: side beams 1, structural beams 2, and welding blocks 3. The side beams 1 are the outer frame of the box body 100, and multiple side beams 1 are connected end to end to form a housing. The two ends of the structural beam 2 are respectively welded to two non-collinear side beams 1. The welding block 3 includes a first surface 31 and a second surface 32. The first surface 31 is in contact with the side beam 1, and the second surface 32 is in contact with the structural beam 2. A first weld 4 is provided between the first surface 31 and the side beam 1. A second weld 5 is provided between the second surface 32 and the structural beam 2.

[0051] The box body 100 may include side beams 1 and structural beams 2 .

[0052] The side beam 1 is the outer contour of the box body 100, and multiple side beams 1 are connected end to end to form the accommodating cavity of the box body 100. For example, Figure 1 As shown, the box body 100 includes four side beams 1, which are connected end to end to form a rectangular outline, and the inner walls of the four side beams 1 are combined to form a rectangular accommodating cavity.

[0053] The two ends of the structural beam 2 are respectively overlapped on two non-collinear side beams 1 to provide structural support for the components in the battery pack.

[0054] Furthermore, considering the standardization and modularization of the box body 100, the structural beam 2 is generally welded to two side beams 1 arranged opposite to each other. Figure 1As shown, the four side beams 1 are connected end to end to form a rectangular outline, so that the four side beams 1 include two relatively long side beams 1 and two relatively short side beams 1. The two ends of the structural beam 2 can be welded to the two long side beams 1 and / or overlapped on the two short side beams 1. At this time, the structural beam 2 welded on the two long side beams 1 can be called a longitudinal beam, and the structural beam 2 welded on the two short side beams 1 can be called a cross beam. The multiple cross beams and multiple longitudinal beams in the battery pack can divide the accommodating cavity in the battery pack into multiple subspaces for installing components with different functions, thereby achieving isolation and insulation between different spaces. For example, the accommodating cavity in the battery pack is divided into a first subspace and a second subspace. Among them, the first subspace can be used to install the battery module, and the second subspace can be used to install the battery management system.

[0055] As the demand for battery capacity increases and the demand for battery functions expands, the number of components in the battery pack increases, and the load borne by the structural beam 2 in the box 100 for providing structural support becomes larger and larger, making the welding point between the structural beam 2 and the side beam 1 prone to breakage due to overload, thereby causing the connection between the structural beam 2 and the side beam 1 to fail.

[0056] Based on this, the present application adds the following to the box 100: Figure 2 and Figure 3 The illustrated welding block 3 has a first surface 31 facing the edge beam 1 and a second surface 32 facing the structural beam 2. Furthermore, the first surface 31 mates with the edge beam 1, forming a first weld 4 between the first surface 31 and the edge beam 1. The second surface 32 mates with the structural beam 2, forming a second weld 5 between the second surface 32 and the structural beam 2. The operator welds at the first weld 4 and the second weld 5, increasing the number of welds between the structural beam 2 and the edge beam 1. The load borne by the structural beam 2 can be distributed across multiple welds, thereby improving the structural beam 2's ability to withstand high loads and, in turn, increasing the connection strength between the structural beam 2 and the edge beam 1.

[0057] In summary, a welding block 3 is added to the box 100. The first surface 31 of the welding block 3 is aligned with the side beam 1, and a first weld 4 is provided between the first surface 31 and the side beam 1. The second surface 32 of the welding block 3 is aligned with the structural beam 2, and a second weld 5 is provided between the second surface 32 and the structural beam 2. The operator welds on the first weld 4 and the second weld 5, increasing the number of weld points between the structural beam 2 and the side beam 1, improving the connection strength between the structural beam 2 and the side beam 1, and thus extending the battery life.

[0058] Furthermore, in some embodiments, the structural beam 2 includes a first connecting surface 21 and a second connecting surface 22 disposed opposite each other. The first connecting surface 21 and the second connecting surface 22 are both welded to the side beam 1. Two welding blocks 3 are provided between the side beam 1 and one end of the structural beam 2. The second surface 32 of one welding block 3 is aligned with the first connecting surface 21, and the second surface 32 of the other welding block 3 is aligned with the second connecting surface 22.

[0059] The ends of the structural beam 2 are arranged on two non-collinear side beams 1, so that two angles exist between each end of the structural beam 2 and the two side beams 1. One angle is the angle between the first connecting surface 21 and the side beam 1, and the other angle is the angle between the second connecting surface 22 and the side beam 1.

[0060] For example, four side beams 1 are connected end to end to form a rectangular profile, so that the four side beams 1 include two oppositely disposed long side beams 1 and two oppositely disposed short side beams 1. The ends of the structural beam 2 can be welded to the two long side beams 1 and / or overlapped on the two short side beams 1. The structural beam 2 welded to the two long side beams 1 can be called a longitudinal beam, and the structural beam 2 welded to the two short side beams 1 can be called a transverse beam. In this case, one end of the longitudinal beam forms two 90-degree angles with the long side beams 1, and one end of the transverse beam forms two 90-degree angles with the short side beams 1.

[0061] Based on this, Figure 4 and Figure 5 As shown, the longitudinal beam includes a first connecting surface 21 and a second connecting surface 22 disposed opposite each other. Two welding blocks 3 can be provided between the long side beam 1 and one end of the longitudinal beam. The first surface 31 of one welding block 3 is aligned with the side beam 1, while the second surface 32 is aligned with the first connecting surface 21 of the longitudinal beam. The first surface 31 of the other welding hole is aligned with the side beam 1, while the second surface 32 is aligned with the second connecting surface 22 of the longitudinal beam. This increases the number of welds between the first connecting surface 21 and the side beam 1, as well as the number of welds between the second connecting surface 22 and the side beam 1, further enhancing the connection strength between the longitudinal beam and the side beam 1.

[0062] The same applies to the crossbeams and other structural beams 2, which will not be described here.

[0063] In summary, two welding blocks 3 are provided between the side beam 1 and one end of the structural beam 2. The second surface 32 of one welding block 3 is aligned with the first connection surface 21 of the structural beam 2, while the second surface 32 of the other welding block 3 is aligned with the second connection surface 22 of the structural beam 2. This further improves the connection strength between the structural beam 2 and the side beam 1, thereby further extending the battery life.

[0064] Furthermore, both ends of the structural beam 2 are welded to the side beams 1 , so four welding blocks 3 can be provided between one structural beam 2 and two side beams 1 .

[0065] Furthermore, the structural forms of the welding block 3 may include but are not limited to the following two:

[0066] Structure 1: The welding block 3 can be a block structure.

[0067] Structure 2: The welding block 3 can be a plate-shaped structure.

[0068] Based on the description of the above embodiment, the operator can freely select the structural form of the welding block 3 according to conditions such as the size of the installation space in the box 100 and the connection strength requirements between the structural beam 2 and the side beam 1.

[0069] In some embodiments, when the welding block 3 is a block structure, a plurality of first welding seams 4 are provided between the first surface 31 and the side beam 1 .

[0070] When the welding block 3 is a block structure, the first surface 31 can be in various shapes such as a triangle, a rectangle, or a pentagon, etc. This application does not impose any limitation on this.

[0071] For example, Figure 3 As shown, when the first surface 31 of the welding block 3 is rectangular, at least three sides of the rectangle can be used as the first weld 4 for welding, thereby increasing the number of welding points between the first surface 31 and the side beam 1, that is, increasing the number of welding points between the structural beam 2 and the side beam 1. However, one side near the bottom of the box body 100 cannot be welded.

[0072] Based on the description of the above embodiment, when the welding block 3 is a block structure, multiple first welds 4 are provided between the first surface 31 and the side beam 1, which increases the welding points between the structural beam 2 and the side beam 1, further improves the connection strength between the structural beam 2 and the side beam 1, and thus further extends the service life of the battery.

[0073] In some embodiments, when the welding block 3 is a block structure, a plurality of second welds 5 are provided between the second surface 32 and the structural beam 2 .

[0074] When the welding block 3 is a block structure, the second surface 32 can be in various shapes such as a triangle, a rectangle, or a pentagon, etc. This application does not impose any limitation on this.

[0075] For example, when the second surface 32 of the welding block 3 is rectangular, at least three sides of the rectangle can be welded as the second weld seam 5, thereby increasing the number of weld points between the second surface 32 and the structural beam 2, and thus increasing the number of weld points between the structural beam 2 and the side beam 1. However, one side near the bottom of the box body 100 cannot be welded.

[0076] Based on the description of the above embodiment, when the welding block 3 is a block structure, multiple second welds 5 are provided between the second surface 32 and the structural beam 2, which increases the welding points between the structural beam 2 and the side beam 1, further improves the connection strength between the structural beam 2 and the side beam 1, and thus further extends the service life of the battery.

[0077] In some embodiments, the top surface of the welding block 3 is lower than the top surface of the side beam 1 in the first direction X. The top surface of the welding block 3 is lower than the top surface of the structural beam 2 in the first direction X. The first direction X is the height direction of the box body 100.

[0078] In the related art, other components installed in the box 100 generally enter the box 100 along the first direction X during installation. For example, the battery module is generally placed in the box 100 along the height direction of the box 100, and the structural beam 2 is required as a supporting structure to hold up the battery module.

[0079] Based on this, the top surface of the welding block 3 is lower than the top surface of the side beam 1 in the first direction X, and the top surface of the welding block 3 is lower than the top surface of the structural beam 2 in the first direction X, so as to avoid affecting the installation of other components in the box 100 to ensure the normal use of the battery.

[0080] In order to ensure that the top surface of the welding block 3 is lower than the top surface of the side beam 1 and the top surface of the structural beam 2 in the first direction X, the box 100 in the present application is further provided with a first positioning component and a second positioning component. Detailed description is given below:

[0081] In some embodiments, a first positioning assembly is provided between the first surface 31 and the side beam 1. The first positioning assembly includes a first positioning block and a first positioning slot. The first positioning slot is provided on the first surface 31, and the first positioning block is provided on the side beam 1. Alternatively, the first positioning slot is provided on the side beam 1, and the first positioning block is provided on the first surface 31. The first positioning block engages with the first positioning slot.

[0082] The first positioning assembly is used to fix the relative position between the first surface 31 and the side beam 1 .

[0083] Specifically, the first positioning assembly may include a first positioning block and a first positioning slot. The first positioning block is engaged with the first positioning slot, preventing the first positioning block and the first positioning slot from moving relative to each other, thereby achieving positional limitation. Furthermore, the operator may design the position of the first positioning block or the first positioning slot so that the first positioning slot or the first positioning block is confined to the aforementioned position, thereby achieving the positioning function.

[0084] The first positioning block can be disposed on the first surface 31 or on the side beam 1, and this application does not impose any restrictions on this. When the first positioning block is disposed on the first surface 31, the first positioning groove is disposed on the side beam 1, and the operator can design the position of the first positioning groove so that the first surface 31 is connected to a defined position. When the first positioning block is disposed on the side beam 1, the first positioning block is disposed on the first surface 31, and the operator can design the position of the first positioning block so that the first surface 31 is connected to a defined position.

[0085] Based on the description of the above embodiment, a first positioning assembly is provided between the first surface 31 and the side beam 1 so that the first surface 31 of the welding block 3 is connected to a defined position of the side beam 1 .

[0086] In some embodiments, a second positioning assembly is provided between the second surface 32 and the structural beam 2. The second positioning assembly includes a second positioning block and a second positioning slot. The second positioning slot is provided on the second surface 32, and the second positioning slot is provided on the structural beam 2. Alternatively, the second positioning slot is provided on the structural beam 2, and the second positioning hole is provided on the second surface 32.

[0087] The second positioning assembly is used to fix the relative position between the second surface 32 and the structural beam 2 .

[0088] Specifically, the second positioning assembly may include a second positioning block and a second positioning slot. The second positioning block is engaged with the second positioning slot, preventing the second positioning block and the second positioning slot from moving relative to each other, thereby achieving positional limitation. Furthermore, the operator can design the position of the second positioning block or the second positioning slot so that the second positioning slot or the second positioning block is confined to the aforementioned position, thereby achieving the positioning function.

[0089] The second positioning block can be disposed on the second surface 32 or on the structural beam 2, and this application does not impose any restrictions thereon. When the second positioning block is disposed on the second surface 32, the second positioning groove is disposed on the structural beam 2, and the operator can design the position of the second positioning groove so that the second surface 32 is connected to a defined position. When the second positioning block is disposed on the structural beam 2, the second positioning block is disposed on the second surface 32, and the operator can design the position of the second positioning block so that the second surface 32 is connected to a defined position.

[0090] Based on the description of the above embodiment, a second positioning assembly is provided between the second surface 32 and the structural beam 2 so that the second surface 32 of the welding block 3 is connected to a defined position of the structural beam 2 .

[0091] In summary, the first positioning assembly defines the relative position of the welding block 3 and the side beam 1, and the second positioning assembly defines the relative position of the welding block 3 and the structural beam 2, so that the operator can design the positions of the first positioning assembly and the second positioning assembly on the side beam 1 and the structural beam 2 so that the top surface of the welding block 3 is lower than the top surface of the side beam 1 and the top surface of the structural beam 2 in the first direction X. In a second aspect, the present application provides a box body comprising: a battery module, a battery management system, a cooling system, and any one of the above embodiments. The box body has a accommodating cavity. The battery module, the battery management system, and the cooling system are all arranged in the accommodating cavity.

[0092] In a third aspect, the present application provides an electrical device, comprising: the battery pack described in the above embodiment. The battery pack is used to provide electrical energy.

[0093] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0094] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A box body, used for a battery pack, characterized in that: include: edge beams, structural beams and welded blocks; The side beams are the outer frame of the box body, and multiple side beams are connected end to end to form a receiving cavity; The two ends of the structural beam are welded to two non-collinear edge beams; The welding block includes a first surface and a second surface; The first side is aligned with the edge beam, and the second side is aligned with the structural beam; A first weld is provided between the first surface and the side beam; A second weld is provided between the second surface and the structural beam.

2. The box according to claim 1, characterized in that The structural beam includes a first connecting surface and a second connecting surface that are arranged opposite to each other; The first connecting surface and the second connecting surface are both welded to the side beam; Two welding blocks are provided between the edge beam and one end of the structural beam; The second surface of one of the welding blocks is in contact with the first connection surface, and the second surface of one of the welding blocks is in contact with the second connection surface.

3. The box according to claim 1, characterized in that The welding block can be a block-shaped structure or a plate-shaped structure.

4. The box according to claim 3, characterized in that: When the welding block is a block structure, a plurality of first welding seams are provided between the first surface and the side beam.

5. The box according to claim 3, characterized in that: When the welding block is a block structure, a plurality of second welding seams are provided between the second surface and the structural beam.

6. The box according to any one of claims 1 to 5, characterized in that: The top surface of the welding block is lower than the top surface of the edge beam in the first direction; The top surface of the welding block is lower than the top surface of the structural beam in the first direction; The first direction is the height direction of the box.

7. The box according to claim 6, characterized in that: A first positioning assembly is provided between the first surface and the side beam; The first positioning assembly includes a first positioning block and a first positioning slot; The first positioning groove is provided on the first surface, and the first positioning block is provided on the side beam; or, The first positioning groove is provided on the side beam, and the first positioning block is provided on the first surface; The first positioning block is clamped in the first positioning groove.

8. The box according to claim 6, characterized in that: A second positioning assembly is provided between the second surface and the structural beam; The second positioning assembly includes a second positioning block and a second positioning slot; The second positioning groove is provided on the second surface, and the second positioning groove is provided on the structural beam; or, The second positioning groove is arranged on the structural beam, and the second positioning hole is arranged on the second surface.

9. A battery pack, characterized in that: Comprising a battery module, a battery management system, a cooling system and a box as claimed in any one of claims 1 to 8; The box body has a accommodating cavity; The battery module, the battery management system and the cooling system are all arranged in the accommodating cavity.

10. An electrical device, characterized in that: The battery pack according to claim 9 is used to provide electrical energy.

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