Box body structure, battery pack and electric device

Abstract

The utility model provides a box body structure, a battery pack and an electric device. The box body structure comprises a lower box body, an upper box body, a pressing strip and a sealing strip. The lower box body comprises a bottom plate and a first baffle. The first baffle is welded to the bottom plate, and the first baffle is perpendicular to the bottom plate. A first welding seam exists at the joint of the first baffle and the bottom plate. The upper box body comprises a top plate and a second baffle. The second baffle is perpendicular to the top plate. The sealing strip is laid on the edge of the first baffle and the edge of the bottom plate, and the sealing strip is not in contact with the first welding seam, so that the problem of burrs on the first welding seam is avoided, a gap exists between the sealing strip and the lower box body, the sealing performance of the box body structure is improved, the risk of exposure of the battery module is avoided, and normal use of the electric device is ensured. The pressing strip is connected to the edges of the second baffle and the top plate. The upper box body and the lower box body are buckled to form an accommodating space of the battery module, the sealing strip is tightly pressed by the pressing strip, and the sealing strip is fixed on the pressing strip, so that the accommodating space is a closed space.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a box structure, a battery pack and an electric device. BACKGROUND

[0002] The battery pack in an electric bus or an electric heavy truck can include a longer box structure and more battery modules. The longer box structure can include a separate upper box and a lower box. The battery modules are placed in the lower box, and then the upper box and the lower box are combined to form a complete battery pack.

[0003] In related technologies, there is a problem of sealing failure between the upper box and the lower box in the box structure, which exposes the battery modules to risk, thereby adversely affecting the normal operation of the battery modules in different environments. UTILITY MODEL CONTENT

[0004] The present application provides a box structure, a battery pack and an electric device, which improves the sealing performance of the box structure, avoids the risk of exposing the battery modules, and ensures the normal use of the electric device.

[0005] In a first aspect, the present application provides a box structure, comprising: a lower box, an upper box, a pressing strip and a sealing strip. The lower box includes a bottom plate and a first baffle. The first baffle is welded to the bottom plate, and the first baffle and the bottom plate are perpendicular to each other. There is a first weld seam at the connection between the first baffle and the bottom plate. The upper box includes a top plate and a second baffle. The second baffle and the top plate are perpendicular to each other. The sealing strip is laid on the edge of the first baffle and the edge of the bottom plate, and the sealing strip does not contact the first weld seam. The pressing strip is connected to the edge of the second baffle and the top plate. The upper box and the lower box are buckled to form a containing space for the battery modules, the pressing strip presses the sealing strip, and the sealing strip is fixed on the pressing strip, so that the containing space is a closed space.

[0006] According to the first aspect, the box structure includes a lower box, an upper box, a pressing strip and a sealing strip. The upper box and the lower box are buckled to form a containing space for the battery modules to adapt to high energy density battery packs. The sealing strip is laid on the bottom plate and the first baffle of the lower box, and the pressing strip is connected to the edge of the second baffle and the top plate of the upper box. When the upper box and the lower box are buckled, the pressing strip can press the sealing strip, and the sealing strip is fixed on the pressing strip, so that the containing space is a closed space. In addition, the sealing strip does not contact the first weld seam of the lower box, avoiding the problem of burrs on the first weld seam, so that there is a gap between the sealing strip and the lower box, improving the sealing performance of the box structure, avoiding the risk of exposing the battery modules, and ensuring the normal use of the electric device.

[0007] In a possible design, the sealing strip can include a stepped surface and a connecting surface. The stepped surface is connected with the connecting surface, and an included angle is formed between the stepped surface and the connecting surface. The included angle forms an angular space between the stepped surface and the connecting surface. The first weld is located in the angular space.

[0008] Based on the description of the above embodiment, the sealing strip has the stepped surface and the connecting surface, and the included angle between the stepped surface and the connecting surface forms the angular space. The first weld is located in the angular space, so that the sealing strip is not directly in contact with the first weld, the burr problem of the first weld is avoided, a gap is formed between the sealing strip and the lower box body, the sealing performance of the box structure is improved, the risk of exposure of the battery module is avoided, and normal use of the electrical device is ensured.

[0009] In a possible design, the stepped surface and the connecting surface are fixed to the pressing strip through three connecting pieces. The three connecting pieces are arranged in a triangular shape. The three connecting pieces are three vertices of the triangle. The stepped surface and the connecting surface are located in the triangle.

[0010] Based on the description of the above embodiment, the three connecting pieces between the pressing strip and the sealing strip serve as the vertices of the triangle, and are used to fix the stepped surface and the connecting surface in the sealing strip. The connection stability of the sealing strip is improved, a stable closed space is formed in the box structure, the risk of exposure of the battery module is avoided, and normal use of the electrical device is ensured.

[0011] In a possible design, the pressing strip is an L-shaped plate.

[0012] Based on the description of the above embodiment, when the pressing strip is the L-shaped plate, the three connecting pieces can form a triangle as three vertices. The sealing strip is stably connected through the connecting pieces, a stable closed space is formed in the box structure, the risk of exposure of the battery module is avoided, and normal use of the electrical device is ensured.

[0013] In a possible design, an avoiding groove is formed in the sealing strip. The first weld is located in the avoiding groove.

[0014] Based on the description of the above embodiment, the first weld is located in the avoiding groove formed in the sealing strip, so that the sealing strip is not directly in contact with the first weld, the burr problem of the first weld is avoided, a gap is formed between the sealing strip and the lower box body, the sealing performance of the box structure is improved, the risk of exposure of the battery module is avoided, and normal use of the electrical device is ensured.

[0015] In a possible design, the sealing strip is fixed to the pressing strip through a plurality of connecting pieces.

[0016] Based on the description of the above embodiment, the sealing strip is fixed on the pressing strip through the plurality of connecting pieces to realize stable connection of the sealing strip, so that a closed space with stable structure is formed in the box structure, the risk of exposure of the battery module is avoided, and normal use of the electric device is ensured.

[0017] In a possible design, the pressing strip is a straight plate.

[0018] Based on the description of the above embodiment, when the pressing strip is a straight plate, the sealing strip can be stably connected through the plurality of connecting pieces, so that a closed space with stable structure is formed in the box structure, the risk of exposure of the battery module is avoided, and normal use of the electric device is ensured.

[0019] In a possible design, the sealing strip can be made of polytetrafluoroethylene, ethylene propylene diene rubber, or foamed silica gel.

[0020] Based on the description of the above embodiment, according to the working condition and the specification of the battery pack, an operator can select a suitable sealing strip material to ensure the sealing property of the structural box, so as to avoid the risk of exposure of the battery module, and ensure normal use of the electric device.

[0021] In a second aspect, the application provides a battery pack, including a battery module and the box structure in any one of the above embodiments.

[0022] In a third aspect, the application provides an electric device, including the battery pack in the above embodiments. The battery pack is used to provide electric energy.

[0023] The battery pack provided in the above second aspect and the electric device provided in the above third aspect have the beneficial effects of the first aspect and the possible implementation manners of the first aspect, which will not be described herein again. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 It is a structural schematic view of the box structure in the embodiments of the application.

[0026] Figure 2 It is an exploded view of Figure 1 .

[0027] Figure 3Figure 1 is an assembly view of a lower box and a sealing strip in an embodiment of the present application.

[0028] Figure 4 Figure 2 is an assembly view of a sealing strip and a pressing strip in an embodiment of the present application. Figure 3 Figure 3 is an enlarged view of part A in Figure 2.

[0029] Figure 5 Figure 4 is an assembly view of a pressing strip in an embodiment of the present application.

[0030] Figure 6 Figure 5 is a structure view of a pressing strip in an embodiment of the present application.

[0031] Legend of reference signs:

[0032] 100 - box structure;

[0033] 1 - lower box; 11 - bottom plate; 12 - first baffle; 13 - first weld;

[0034] 2 - upper box; 21 - top plate; 22 - second baffle;

[0035] 3 - sealing strip; 31 - first face; 32 - stepped face; 33 - connecting face; 34 - second face;

[0036] 4 - pressing strip; 41 - connecting piece; 42 - threaded hole;

[0037] 5 - battery module;

[0038] X - first direction; Y - second direction. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing the specific embodiments only and is not intended to be limiting of the application.

[0041] The terms "comprise" and "have" and any variations thereof used in the specification and claims of the present application and the drawings description are intended to cover both non-exclusive inclusion and exclusive inclusion. The word "one" or "a" does not exclude the presence of more than one.

[0042] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a common embodiment, or an embodiment that is independent of all other embodiments. One of ordinary skill in the art will recognize that an implementation including "an embodiment" encompasses one or more implementations that include "an embodiment".

[0043] The term "and / or", merely describes association relationship of associated objects, and means that three relationships can exist, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally means that the front and rear associated objects are in an "or" relationship.

[0044] The orientation words appearing in the following description are the directions shown in the drawings, and are not limited to the specific structure of the application. For example, in the description of the application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0045] In addition, the expressions of the indicating directions for describing the operation and structure of each component of the embodiments, such as X direction, Y direction and Z direction, are not absolute but relative, and although these indications are appropriate when each component is in the position shown in the drawings, these directions should be interpreted differently to correspond to the changes when these positions change.

[0046] In addition, the terms "first", "second", and the like in the specification and claims of the application or the above drawings are used to distinguish different objects, and are not used to describe a specific order, and can explicitly or implicitly include one or more of the features.

[0047] In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups).

[0048] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, the "connection" or "connecting" of mechanical structures can mean physical connection, for example, the physical connection can be fixed connection, for example, fixed connection by screws, bolts or other fixing members; the physical connection can also be detachable connection, for example, mutual clamping or clamping connection; the physical connection can also be integrally connected, for example, welding, bonding or integrally formed connection. The "connection" or "connecting" of circuit structures can mean not only physical connection, but also electrical connection or signal connection, for example, it can be direct connection, that is, physical connection, or indirect connection through at least one intermediate element, as long as the circuit is connected, it can also be the connection between two elements; signal connection can not only be signal connection through circuit, but also signal connection through media medium, for example, radio wave. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] The electric device refers to an electrical equipment that uses electric energy to complete a specific function. The electric device can include, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, etc. Among them, the electric automobile can include an electric commercial vehicle, an electric passenger vehicle, an electric bus and an electric heavy truck, etc. The above-mentioned devices are powered by connecting to a power supply to provide various functions or services.

[0050] The battery pack in the electric bus or the electric heavy truck can include a relatively long box structure and a relatively large number of battery modules.

[0051] Further, the relatively long box structure can include a separate upper box and a lower box. After placing the battery modules in the lower box, the upper box and the lower box are combined to form a complete battery pack.

[0052] In the related art, there is a problem of sealing failure between the upper box and the lower box in the box structure, which exposes the battery modules to the risk, thereby being not conducive to the normal operation of the battery modules in different environments.

[0053] Therefore, the present application provides a box structure, a battery pack and an electric device. By arranging a sealing strip in the box structure, the sealing property of the box structure is improved, the risk of exposing the battery modules is avoided, and the normal use of the electric device is ensured. The specific description is as follows in combination with the Figures 1-6

[0054] ​In a first aspect, the application provides a box structure 100, comprising a lower box 1, an upper box 2, a pressing strip 4 and a sealing strip 3. The lower box 1 comprises a bottom plate 11 and a first baffle 12. The first baffle 12 is welded on the bottom plate 11, and the first baffle 12 and the bottom plate 11 are perpendicular to each other. There is a first weld seam 13 at the connection between the first baffle 12 and the bottom plate 11. The upper box 2 comprises a top plate 21 and a second baffle 22. The second baffle 22 and the top plate 21 are perpendicular to each other. The sealing strip 3 is laid on the edge of the first baffle 12 and the edge of the bottom plate 11, and the sealing strip 3 does not contact the first weld seam 13. The pressing strip 4 is connected to the edge of the second baffle 22 and the top plate 21. The upper box 2 is buckled with the lower box 1 to form a containing space for the battery module 5. The pressing strip 4 presses the sealing strip 3 and fixes the sealing strip 3 on the pressing strip 4, so that the containing space is a closed space.

[0055] The box structure 100 has a containing cavity. The containing cavity is used to place the battery module 5, so that the box structure 100 provides physical protection for the battery module 5 to ensure that the battery module 5 can safely operate under different environmental conditions. Specifically, the battery module 5 is used to perform charging and discharging reactions to provide electric energy for an electric device.

[0056] The box structure 100 can include an integrated box structure 100 and a split box structure 100. Among them, the split box structure 100 is suitable for a battery module 5 with high energy density. Specifically, as shown in Figure 1 and Figure 2 The split box structure 100 can include an upper box 2 and a lower box 1. The upper box 2 and the lower box 1 are independent components, and both the upper box 2 and the lower box 1 are containing cavities with openings. The upper box 2 is buckled on the lower box 1, so that the first opening of the lower box 1 and the second opening of the upper box 2 are butt jointed, thereby the containing cavities of the lower box 1 and the upper box 2 are communicated to form a whole for placing the battery module 5.

[0057] When the first opening and the second opening are butt jointed, a gap will exist at the butt joint, thereby affecting the sealing performance of the box structure 100.

[0058] Based on this, as shown in Figure 2 and Figure 3 The first opening of the lower box 1 is provided with a sealing strip 3. The second opening of the upper box 2 is provided with a pressing strip 4. When the upper box 2 is buckled on the lower box 1, the pressing strip 4 presses the sealing strip 3, so that the sealing strip 3 fills the gap and is fixed on the pressing strip 4, thereby forming a closed space with stable structure in the box structure 100, avoiding the risk of exposing the battery module 5, and ensuring the normal use of the electric device.

[0059] Further, as shown in Figure 2As shown, the lower housing 1 includes a base plate 11 and two first baffles 12 arranged along a first direction X. The first baffles 12 are welded to the base plate 11 and are perpendicular to each other, thus forming a receiving cavity for the lower housing 1. Specifically, as shown... Figure 4 As shown, there is a first weld 13 at the connection between the first baffle 12 and the base plate 11.

[0060] like Figure 2 As shown, the upper housing 2 includes a top plate 21 and two second baffles 22 perpendicular to the second direction Y. The second baffles 22 are welded to the top plate 21 and are perpendicular to each other, thus forming the receiving cavity of the upper housing 2.

[0061] Combination Figure 1 and Figure 2 It can be seen that when the upper housing 2 is fastened onto the lower housing 1, the top plate 21 contacts the first baffle 12, the bottom plate 11 contacts the second baffle 22, and the end of the second baffle 22 away from the top plate 21 contacts the first weld 13. Therefore, the sealing strip 3 needs to be laid on the edge of the first baffle 12, the edge of the bottom plate 11, and the edge of the first weld 13 so that the sealing strip 3 can completely fill the gap between the upper housing 2 and the lower housing 1.

[0062] In related technologies, the welding process causes burrs in the first weld 13. When the sealing strip 3 is directly laid on the first weld 13, the burrs cause gaps between the sealing strip 3 and the first weld 13. As a result, the sealing strip 3 cannot completely fill the gap between the upper box 2 and the lower box 1, which leads to the problem of sealing failure between the upper box 2 and the lower box 1. This poses a risk of battery module 5 being exposed, which is not conducive to the normal operation of battery module 5 in different environments.

[0063] Based on this, the structure of the sealing strip 3 can be designed so that the sealing strip 3 does not contact the first weld 13, thereby avoiding the gap between the sealing strip 3 and the lower housing 1 due to the burrs on the first weld 13, improving the sealing performance of the housing structure 100, avoiding the risk of the battery module 5 being exposed, and thus ensuring the normal use of the electrical device.

[0064] In summary, the housing structure 100 provided in this application includes a lower housing 1, an upper housing 2, a pressure strip 4, and a sealing strip 3. The upper housing 2 and the lower housing 1 are fastened together to form a space for accommodating the battery module 5, thus accommodating high-energy-density battery packs. The sealing strip 3 is laid on the bottom plate 11 and the first baffle 12 of the lower housing 1, and the pressure strip 4 is connected to the edge of the second baffle 22 and the top plate 21 of the upper housing 2. When the upper housing 2 and the lower housing 1 are fastened together, the pressure strip 4 can press the sealing strip 3 tightly, fixing the sealing strip 3 to the pressure strip 4, making the accommodating space a closed space. In addition, the sealing strip 3 does not contact the first weld 13 of the lower housing 1, avoiding gaps between the sealing strip 3 and the lower housing 1 due to burrs on the first weld 13, improving the sealing performance of the housing structure 100, avoiding the risk of battery module 5 exposure, and thus ensuring the normal use of the electrical device.

[0065] Specifically, the structure of the sealing strip 3 in this application may include, but is not limited to, the following two:

[0066] Structure 1: The sealing strip 3 may include a stepped surface 32 and a connecting surface 33. The stepped surface 32 is connected to the connecting surface 33, and there is an angle between the stepped surface 32 and the connecting surface 33, which creates an angular space between the stepped surface 32 and the connecting surface 33. The first weld 13 is located in the angular space.

[0067] like Figure 4 As shown, the sealing strip 3 may include a first surface 31 laid on the edge of the first baffle 12, a second surface 34 laid on the edge of the base plate 11, and a stepped surface 32 and a connecting surface 33 laid around the first weld 13.

[0068] The first surface 31 is bent away from the first weld 13 to form a stepped surface 32, which is perpendicular to the first surface 31. The stepped surface 32 is used to avoid the first weld 13.

[0069] The step surface 32 is bent toward the base plate 11 to form a connecting surface 33, so that the connecting surface 33 and the step surface 32 are perpendicular to each other.

[0070] The connecting surface 33 is bent away from the first weld 13 to form a second surface 34, which is perpendicular to the connecting surface 33. The connecting surface 33 is used to connect the step surface 32 and the second surface 34, so that the sealing strip 3 returns to the position of contacting the base plate 11 after avoiding the first weld 13.

[0071] Furthermore, the included angle between the step surface 32 and the connecting surface 33 forms an angular space in the direction toward the first weld 13. The first weld 13 is located in the aforementioned angular space, which prevents the sealing strip 3 from directly contacting the first weld 13.

[0072] In summary, the sealing strip 3 has a stepped surface 32 and a connecting surface 33, and the included angle between the stepped surface 32 and the connecting surface 33 forms an angle space. The first weld 13 is located in the above-mentioned angle space, so that the sealing strip 3 is not directly in contact with the first weld 13, the burr problem of the first weld 13 is avoided, there is a gap between the sealing strip 3 and the lower box body 1, the sealing performance of the box structure 100 is improved, the risk of exposure of the battery module 5 is avoided, and the normal use of the electrical device is ensured.

[0073] Structure two: a relief groove is formed in the sealing strip 3. The first weld 13 is located in the relief groove.

[0074] Specifically, the relief groove is a common structure in mechanical design, which is used to provide additional space between two or more components to avoid collision or interference between them. As can be seen, when the first weld 13 is located in the relief groove, it can not be in direct contact with the sealing strip 3.

[0075] In summary, the first weld 13 is located in the relief groove formed in the sealing strip 3, so that the sealing strip 3 is not directly in contact with the first weld 13, the burr problem of the first weld 13 is avoided, there is a gap between the sealing strip 3 and the lower box body 1, the sealing performance of the box structure 100 is improved, the risk of exposure of the battery module 5 is avoided, and the normal use of the electrical device is ensured.

[0076] Further, for structure one, the application also improves the fixing method of the sealing strip 3 as follows:

[0077] In some embodiments, as shown in Figure 5 and Figure 6 , the stepped surface 32 and the connecting surface 33 are fixed on the pressing strip 4 by three connecting pieces 41. The arrangement shape of the three connecting pieces 41 is a triangle. Among them, the three connecting pieces 41 are respectively three vertices of the triangle. The stepped surface 32 and the connecting surface 33 are both located in the triangle.

[0078] The connecting piece 41 is used to fix the sealing strip 3. The connecting piece 41 can include but is not limited to screws, bolts, rivets, positioning pins and other components.

[0079] For example, the connecting piece 41 is a bolt. Threaded holes 42 are formed in the sealing strip 3 and the pressing strip 4 as shown in Figure 6 , so that the connecting piece 41 is sleeved in the threaded hole 42 to fix the sealing strip 3.

[0080] The three connecting pieces 41 are arranged as three vertices of a triangle to form a pressing surface, so that the stepped surface 32 and the connecting surface 33 located in the pressing surface of the triangle are pressed, thereby improving the connection stability of the sealing strip 3, forming a closed space with stable structure in the box structure 100, avoiding the risk of exposure of the battery module 5, and ensuring the normal use of the electric device.

[0081] According to the above description, the three connecting pieces 41 between the pressing strip 4 and the sealing strip 3 are arranged as three vertices of a triangle to fix the stepped surface 32 and the connecting surface 33 in the sealing strip 3, thereby improving the connection stability of the sealing strip 3, forming a closed space with stable structure in the box structure 100, avoiding the risk of exposure of the battery module 5, and ensuring the normal use of the electric device.

[0082] Further, for structure two, the application also improves the fixing method of the sealing strip 3 as follows:

[0083] In some embodiments, the sealing strip 3 is fixed on the pressing strip 4 by the plurality of connecting pieces 41.

[0084] The connecting piece 41 is used to fix the sealing strip 3. The connecting piece 41 can include but is not limited to screws, bolts, rivets, positioning pins and the like.

[0085] For example, the connecting piece 41 is a bolt. Corresponding threaded holes 42 are formed on the sealing strip 3 and the pressing strip 4, so that the connecting piece 41 is sleeved in the threaded hole 42 to fix the sealing strip 3, so that the sealing strip 3 can play a sealing role in the box structure 100.

[0086] In combination with Figure 2 It can be seen that the sealing strip 3 is laid along the edges of the bottom plate 11 and the first baffle 12. Therefore, a plurality of connecting pieces 41 need to be arranged along the edges of the bottom plate 11 and the first baffle 12 to realize the stable connection of the sealing strip 3.

[0087] According to the above embodiment, the sealing strip 3 is fixed on the pressing strip 4 by the plurality of connecting pieces 41 to realize the stable connection of the sealing strip 3, form a closed space with stable structure in the box structure 100, avoid the risk of exposure of the battery module 5, and ensure the normal use of the electric device.

[0088] Further, in order to smoothly connect the three connecting pieces 41 in structure one, the application also improves the structure of the pressing strip 4 as follows:

[0089] In some embodiments, as Figure 6 shown, the pressing strip 4 is an L-shaped plate.

[0090] When the L-shaped plate can include a first section and a second section perpendicular to each other. When one of the three connectors 41 is located in the first section, and the other two connectors 41 are located in the second section, the above-mentioned three connectors 41 can be used as three vertices to form a triangle.

[0091] According to the description of the above embodiment, when the pressing strip 4 is an L-shaped plate, the three connectors 41 can be used as three vertices to form a triangle, so that the sealing strip 3 is stably connected through the above-mentioned connectors 41, and a closed space with stable structure is formed in the box structure 100, avoiding the risk of exposing the battery module 5, thereby ensuring the normal use of the electrical device.

[0092] Further, for structure two, the structure of the pressing strip 4 is further improved as follows:

[0093] In some embodiments, the pressing strip 4 is a straight line type plate.

[0094] Since a plurality of connectors 41 are arranged along the edges of the bottom plate 11 and the first baffle 12, and the connectors 41 need to be fixed on the pressing strip 4. Therefore, the pressing strip 4 can be a straight line type plate parallel to the edge of the bottom plate 11, or the pressing strip 4 can be a straight line type plate parallel to the edge of the first baffle 12, so that the sealing strip 3 can be stably connected through the plurality of connectors 41.

[0095] According to the description of the above embodiment, when the pressing strip 4 is a straight line type plate, the sealing strip 3 can be stably connected through the plurality of connectors 41, so that a closed space with stable structure is formed in the box structure 100, avoiding the risk of exposing the battery module 5, thereby ensuring the normal use of the electrical device.

[0096] Further, the material of the sealing strip 3 is further limited as follows:

[0097] The material of the sealing strip 3 can have multiple selection methods, some of which are exemplified below, but do not constitute a limitation on the technical solutions of the present application.

[0098] The first selection method is that the sealing strip 3 can be made of polytetrafluoroethylene (PTFE).

[0099] Among them, polytetrafluoroethylene (PTFE) is often used in battery pack seals due to its excellent chemical stability and high temperature resistance. Its low friction coefficient and high lubricity make it an ideal sealing material.

[0100] The second selection method is that the sealing strip 3 can be made of ethylene propylene diene rubber (EPDM).

[0101] The Shore A hardness of the ethylene propylene diene rubber (EPDM) is 50 degrees, which is excellent in elasticity, and good in resistance to water and oil and other media, and is commonly used for battery pack rubber sealing elements.

[0102] The third selection mode is that the sealing strip 3 is made of foamed silica gel.

[0103] The foamed silica gel can effectively solve the sealing and shock absorption of the upper and lower shells of the new energy automobile battery pack and the support and shock absorption of other components, due to its excellent physical properties, excellent electrical properties and reliable performance.

[0104] In summary, according to the working conditions and specifications of the battery pack, the operator can select the appropriate sealing strip 3 material to ensure the sealing of the structural box, so as to avoid the risk of battery module 5 exposure, thereby ensuring the normal use of the electrical device.

[0105] In a second aspect, the application provides a battery pack, comprising a battery module and the box structure according to any one of the above embodiments.

[0106] In a third aspect, the application provides an electrical device, comprising the battery pack according to the above embodiments. The battery pack is used to provide electrical energy.

[0107] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of the application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0108] The above embodiments are only used to illustrate the technical solutions of the application, but not to limit it; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. A box structure, characterized in that, include: Lower housing, upper housing, pressure strip, and sealing strip; The lower housing includes a bottom plate and a first baffle. The first baffle is welded to the base plate, and the first baffle and the base plate are perpendicular to each other; A first weld is present at the connection between the first baffle and the base plate; The upper housing includes a top plate and a second baffle; The second baffle and the top plate are perpendicular to each other; The sealing strip is laid on the edge of the first baffle and the edge of the bottom plate, and the sealing strip does not contact the first weld. The pressure strip is connected to the edge of the second baffle and the top plate; The upper housing and the lower housing are fastened together to form a space for accommodating the battery module; The pressure strip presses against the sealing strip and fixes the sealing strip to the pressure strip, making the accommodating space a closed space.

2. The box structure according to claim 1, characterized in that, The sealing strip may include a stepped surface and a connecting surface; The stepped surface is connected to the connecting surface, and there is an angle between the stepped surface and the connecting surface; The included angle creates an angular space between the stepped surface and the connecting surface; The first weld is located in the angular space.

3. The box structure according to claim 2, characterized in that, The stepped surface and the connecting surface are fixed to the pressure strip by three connectors; The three connectors are arranged in a triangular shape; The three connectors are the three vertices of the triangle. Both the stepped surface and the connecting surface are located within the triangle.

4. The box structure according to claim 3, characterized in that, The pressure strip is an L-shaped plate.

5. The box structure according to claim 1, characterized in that, The sealing strip is provided with a clearance groove; The first weld is located in the clearance groove.

6. The box structure according to claim 5, characterized in that, The sealing strip is fixed to the pressure strip by multiple connectors.

7. The box structure according to claim 6, characterized in that, The pressure strip is a straight-line plate.

8. The box structure according to claim 1, characterized in that, The sealing strip can be made of polytetrafluoroethylene, EPDM rubber, or foamed silicone.

9. A battery pack, characterized in that, It includes a battery module and a housing structure as described in any one of claims 1-8.

10. An electrical appliance, characterized in that, Includes the battery pack as described in claim 9; The battery pack is used to provide electrical energy.

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