Battery box, battery box manufacturing method, battery and power utilization device

Abstract

The invention belongs to the technical field of batteries, and particularly relates to a battery box, a battery box manufacturing method, a battery and a power utilization device.The battery box comprises a first box body, the first box body comprises a plate, and one side of the plate is provided with a containing space used for containing single batteries; the plate comprises a plate body part and a first bent part, the first bent part is bent towards the accommodating space from the edge part of the plate body part, and the bent fillet radius of the edge part of the plate is small, so that the width size of the first box body can be reduced, the width size of the battery box can be reduced, and the occupied space of the battery in the power utilization device can be reduced; and the structure compactness and the use performance of the power utilization device can be improved.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and particularly relates to a battery box, a method for manufacturing a battery box, a battery, and an electrical device. Background Art

[0002] An electrical device may refer to a device that uses a battery as a power source. A battery generally includes a battery box and one or more battery cells disposed in the battery box. The box body of the battery box is usually formed by a blow molding method. However, the outer dimensions of the box body formed by blow molding are large, so that the battery needs to occupy a large installation space when installed in the electrical device, and the space occupancy rate of the battery in the electrical device is high, which affects the structural compactness and performance of the electrical device.

[0003] The above statements are only used to provide background technical information related to this application, and do not necessarily constitute prior art.

[0004] Application Content

[0005] The purpose of the embodiments of this application is to provide a battery box, a method for manufacturing a battery box, a battery, and an electrical device, including but not limited to solving the problem that the space occupancy rate of the battery in the electrical device in the related art is high, which affects the structural compactness and performance of the electrical device.

[0006] The technical solution adopted in the embodiments of this application is as follows:

[0007] In a first aspect, a battery box is provided. The battery box includes a first box body, and the first box body includes a plate member. One side of the plate member has a receiving space for receiving battery cells; the plate member includes a plate body portion and a first bending portion, and the first bending portion bends from the edge of the plate body portion toward the receiving space.

[0008] For the battery box of the embodiments of this application, the first box body of the battery box includes a plate member. One side of the plate member has a receiving space for receiving battery cells. The plate member includes a plate body portion and a first bending portion, and the first bending portion bends from the edge of the plate body portion toward the receiving space, so that the edge of the plate member is bent to obtain a bending portion and a plate body portion by bending; compared with the box body formed by blow molding, the bending radius of the edge of the plate member of the first box body formed by bending is small, the width dimension of the first box body can be reduced, the width dimension of the battery box can be reduced, and the occupied space of the battery in the electrical device can be reduced, which is beneficial to improving the structural compactness and performance of the electrical device.

[0009] In one embodiment, the first bending portion includes a bending arc segment and a first connecting segment, and the bending arc segment is connected between the first connecting segment and the plate body portion.

[0010] By adopting the technical solution of this embodiment, the first connecting section and the plate body are connected by a curved arc segment transition, which is beneficial to reducing stress concentration, the edge structure strength of the plate is good, and the first box body has a good protective effect on the battery monomer.

[0011] In one embodiment, the thickness of the first connecting segment is t, and the radius of the curved arc segment is R, wherein 0.8≤R / t≤2; preferably, 1≤R / t≤1.5.

[0012] By adopting the technical solution of this embodiment, the bending fillet radius of the first bending portion can be limited to a small and reasonable range. On the one hand, the width of the first box can be made smaller; on the other hand, the bending operation of the first bending portion is easy and simple.

[0013] In one embodiment, the radius of the curved arc segment is R, wherein 0.5mm≤R≤4mm; preferably, 1mm≤R≤2mm.

[0014] By adopting the technical solution of this embodiment, the radius of the bending fillet of the first bending portion is smaller than the radius of the bending fillet of the inflation-molded box body, which reduces the width of the first box body. In addition, the first bending portion has a certain bending fillet, which makes the bending operation of the first bending portion easy and simple, and can also reduce the risk of damage such as breakage caused by excessive bending of the first bending portion, which is conducive to improving the structural strength of the first box body.

[0015] In one embodiment, the angle between the first connecting section and the plate body is α, wherein 85°≤α≤95°; preferably, 89°≤α≤91°.

[0016] By adopting the technical solution of this embodiment, the first connecting section is perpendicular or nearly perpendicular to the plate body, which can reduce the width of the first box body, reduce the width of the battery box, and reduce the space occupied by the battery in the electrical device, which is conducive to improving the structural compactness and performance of the electrical device.

[0017] In one embodiment, the plate further includes a second bending portion, which is bent from the end of the first bending portion away from the plate body toward the plate body, and the second bending portion is located on the side of the first bending portion facing away from the plate body.

[0018] By adopting the technical solution of this embodiment, the second bending portion is bent toward the plate body relative to the first bending section. Compared with the blown box, the second bending portion is not parallel to the plate body, which can reduce the size of the second bending portion in the width direction of the plate, reduce the width of the first box, reduce the width of the battery box, and reduce the space occupied by the battery in the electrical device, which is conducive to improving the structural compactness and performance of the electrical device.

[0019] In one embodiment, the second bending portion includes a bending semicircular segment and a second connecting segment, one end of the bending semicircular segment is connected to the end of the first bending portion away from the plate body, and the other end of the bending semicircular segment is connected to one end of the second connecting segment.

[0020] By adopting the technical solution of this embodiment, the setting of the bent semicircular segment allows the edge of the plate to be bent 180°, so that the first bent portion and the second bent portion can form a stacked structure in the width direction of the plate. Compared with the blown box, this can effectively reduce the width of the first box, reduce the width of the battery box, and reduce the space occupied by the battery in the electrical device, which is beneficial to improving the structural compactness and performance of the electrical device; in addition, the stacked structure can also improve the structural strength of the edge of the plate, which is beneficial to improving the protective effect of the battery box on the battery monomer, and also beneficial to improving the structural reliability of the battery.

[0021] In one embodiment, the second connecting section fits the first bending portion.

[0022] By adopting the technical solution of this embodiment, there is no gap between the second connecting section and the first bending portion, so that the width of the first box body is smaller, the width of the battery box is reduced, and the space occupied by the battery in the electrical device is reduced, which is beneficial to improving the structural compactness and performance of the electrical device; in addition, the second connecting section and the first bending portion are combined to improve the structural strength of the edge of the plate, which is beneficial to improving the protective effect of the battery box on the battery monomer and also to improving the structural reliability of the battery.

[0023] In one embodiment, the plate further includes a reinforcement portion, one end of which is connected to the end of the second bent portion close to the plate body, and the other end of the reinforcement portion is connected to the surface of the plate body facing away from the accommodation space.

[0024] By adopting the technical solution of this embodiment, the reinforcement part is located on the side of the plate part facing away from the accommodation space, so that the reinforcement part can support the plate part, thereby improving the structural strength of the first box body, improving the protective effect of the battery box on the battery monomer, and improving the structural reliability of the battery.

[0025] In one embodiment, the reinforcement portion and the plate body portion are arranged to form a cavity.

[0026] By adopting the technical solution of this embodiment, the reinforcement part and the plate part are surrounded to form a cavity, so that the reinforcement part and the plate part form a cavity structure, which also effectively improves the structural strength of the first box body, improves the protection effect of the battery box on the battery monomer, and improves the structural reliability of the battery; in addition, the cavity can be used as a space for connecting the first box body with other components (for example: the second box body or the chassis of the vehicle, etc.), so as to improve the structural compactness of the battery box.

[0027] In one embodiment, the reinforcing portion includes a first reinforcing section, a second reinforcing section, and a third reinforcing section that are sequentially connected. One end of the first reinforcing section facing away from the second reinforcing section is connected to the end of the second bending portion close to the plate body portion, and one end of the third reinforcing section facing away from the second reinforcing section is connected to the surface of the plate body portion facing away from the accommodating space;

[0028] The second reinforcing section is spaced from the surface of the plate body portion facing away from the accommodating space, so that the first reinforcing section, the second reinforcing section, the third reinforcing section, and the plate body portion jointly enclose a cavity.

[0029] By adopting the technical solution of this embodiment, the reinforcing portion adopts the structural form of the first reinforcing section, the second reinforcing section, and the third reinforcing section, which has a simple structure and is convenient for processing and manufacturing.

[0030] In one embodiment, the reinforcing portion further includes a fourth reinforcing section. One end of the fourth reinforcing section is connected to the end of the third reinforcing section facing away from the second reinforcing section, and the fourth reinforcing section is attached to the surface of the plate body portion facing away from the accommodating space.

[0031] By adopting the technical solution of this embodiment, the fourth reinforcing section is attached to the surface of the plate body portion facing away from the accommodating space, which can effectively support the plate body portion, effectively improve the structure of the first box body, and thus greatly increase the structural strength of the battery box, which is beneficial to improving the use reliability of the battery.

[0032] In one embodiment, the battery box further includes a second box body. The second box body is hermetically connected to the second bending portion, and the first box body and the second box body enclose an accommodating space.

[0033] By adopting the technical solution of this embodiment, the second bending portion is located outside the first box body. The hermetic connection between the second box body and the second bending portion is simple and convenient. In addition, the surface of the second bending portion facing away from the plate body portion has a large area, which can increase the sealing area and improve the sealing performance between the second box body and the second bending portion.

[0034] In one embodiment, the second bending portion is located inside the second box body, and a sealing member is provided between the surface of the second bending portion facing away from the plate body portion and the inner wall surface of the second box body.

[0035] By adopting the technical solution of this embodiment, the surface of the second bending portion facing away from the plate body portion has a large area, and the sealing member can be set larger, increasing the sealing area and improving the sealing performance between the second box body and the second bending portion; in addition, the sealing member is provided between the surface of the second bending portion facing away from the plate body portion and the inner wall surface of the second box body, the sealing structure is simple, and the assembly operation is simple, which is beneficial to improving the production efficiency.

[0036] In one embodiment, the battery box further includes a fastener. The reinforcing portion is configured with a first connection hole for cavity communication. The fastener passes through the first connection hole and is connected to the second box body, so that the seal is clamped and fixed between the surface of the second bent portion facing away from the plate body portion and the inner wall surface of the second box body.

[0037] By adopting the technical solution of this embodiment, the reinforcing portion and the second box body are connected by a fastener, and the connection structure is simple and convenient for processing and manufacturing. In addition, the seal is clamped and fixed between the surface of the second bent portion facing away from the plate body portion and the inner wall surface of the second box body, so that the reinforcing portion is located outside the accommodation space. In this way, setting the first connection hole in the reinforcing portion has little impact on the sealing performance of the accommodation space, which is beneficial to improving the protection effect of the battery cell and thus improving the reliability of battery use. Moreover, the first connection hole communicates with the cavity, and the cavity can provide an installation space for the fastener, which is also beneficial to improving the battery.

[0038] In one embodiment, the reinforcing portion is provided with a mounting structure for fixing the battery box.

[0039] By adopting the technical solution of this embodiment, the mounting structure is provided on the reinforcing portion located outside the accommodation space, which has little impact on the sealing performance of the accommodation space, is beneficial to improving the protection effect of the battery cell and thus improving the reliability of battery use. In addition, the reinforcing portion also has good structural strength, which improves the stability and reliability of the battery in the electrical device.

[0040] In one embodiment, the mounting structure includes a second connection hole, and the second connection hole communicates with the cavity.

[0041] By adopting the technical solution of this embodiment, the mounting structure adopts the structural form of the second connection hole, which is simple in structure and convenient for processing and manufacturing. In addition, the second connection hole communicates with the cavity, so that the connecting piece for fixedly connecting the battery box and the electrical device can utilize the space of the cavity for installation, making full use of the space in the first box body, which is beneficial to improving the structural compactness and service performance of the electrical device.

[0042] In one embodiment, in the direction of the first bent portion facing the second bent portion, the size of the plate body portion is L 1 , and the size of the reinforcing portion is L 2 , where 0.05 ≤ L 2 / L 1 ≤ 0.25. Preferably, 0.1 ≤ L 2 / L 1 ≤ 0.2.

[0043] By adopting the technical solution of this embodiment, the proportion of the strengthening part in the width direction of the plate body part is small. The strengthening part is arranged near the edge part of the plate body part, and the strengthening part can play a good role in strengthening and supporting the edge part of the plate body part, improving the structural strength of the first box body and the reliability of the battery during use in the electrical device.

[0044] In one embodiment, first bending parts are provided at two edge parts of the plate body part that are oppositely distributed along the first direction.

[0045] By adopting the technical solution of this embodiment, two first bending parts are obtained by bending the opposite two edge parts of the plate member respectively. The bending fillet radii of the opposite two side parts of the plate member can be set to be relatively small, which can better reduce the width of the first box body and the width of the battery box, and is beneficial to improving the structural compactness and service performance of the battery and the electrical device.

[0046] In one embodiment, the plate member further includes a third bending part and a fourth bending part. The third bending part bends from one of the two edge parts of the plate body part that are oppositely distributed along the second direction towards the accommodating space, and the fourth bending part bends from the other of the two edge parts of the plate body part that are oppositely distributed along the second direction towards the accommodating space. The first direction and the second direction intersect.

[0047] By adopting the technical solution of this embodiment, the other two opposite edge parts of the plate member respectively obtain a third bending part and a fourth bending part by bending, and the bending fillet radii of the other two opposite edge parts of the plate member can be set to be relatively small, which can better reduce the length of the first box body and the length of the battery box, and is beneficial to improving the structural compactness and service performance of the battery and the electrical device.

[0048] In one embodiment, the first box body further includes a first sealing plate and a second sealing plate for connecting with the plate member. The first sealing plate is inserted between one end of the first bending part and the third bending part, and the second sealing plate is inserted between the other end of the first bending part and the fourth bending part. The first sealing plate, the second sealing plate and the plate member enclose to form an accommodating space.

[0049] By adopting the technical solution of this embodiment, the first sealing plate is inserted between one end of the first bending part and the third bending part, which can realize the pre-positioning of the first sealing plate to facilitate subsequent fixing operations; similarly, the second sealing plate is inserted between the other end of the first bending part and the fourth bending part, which can also realize the pre-positioning of the second sealing plate to facilitate subsequent fixing operations.

[0050] In one embodiment, the battery box further includes a second box body. The two opposite side parts of the second box body along the first direction are respectively connected to the two first bending parts, one of the two opposite side parts of the second box body along the second direction is connected to the first sealing plate, and the other of the two opposite side parts of the second box body along the second direction is connected to the second sealing plate.

[0051] By adopting the technical solution of this embodiment, the opposite sides of the second box body are respectively connected to two second bending parts, and the other opposite sides of the second box body are respectively connected to the first sealing plate and the second sealing plate, so that the first box body and the second box body enclose a containing space, and the structure of the battery box is simple and convenient for processing and manufacturing.

[0052] In one embodiment, the first box body further includes a plurality of mounting beams for connecting to the plate body part, the plurality of mounting beams are arranged at intervals in the second direction, and the first direction intersects with the second direction.

[0053] By adopting the technical solution of this embodiment, the setting of the plurality of mounting beams can play a role in strengthening the structural strength of the plate body part, improve the structural strength in the width direction of the first box body, and is beneficial to improving the use reliability of the battery and the electrical device.

[0054] In one embodiment, the plurality of mounting beams are located on the side of the plate body part facing away from the containing space.

[0055] By adopting the technical solution of this embodiment, the mounting beams are located outside the containing space, and the mounting beams do not occupy the space of the containing space, so that the containing space can accommodate more battery cells, which is beneficial to improving the energy density of the battery.

[0056] In one embodiment, the first box body further includes a first module beam and a second module beam for connecting to the battery cell and connecting to the plate member, the first module beam and the second module beam are located in the containing space, the first module beam is located at one of the two opposite edges of the plate body part distributed in the second direction, and the second module beam is located at the other of the two opposite edges of the plate body part distributed in the second direction.

[0057] By adopting the technical solution of this embodiment, the first module beam and the second module beam can play a role in supporting and fixing the battery cell, and improve the use reliability of the battery.

[0058] In one embodiment, in the second direction, the first mounting beam is arranged opposite to the first module beam, and / or the last mounting beam is arranged opposite to the second module beam.

[0059] By adopting the technical solution of this embodiment, the structural strength of the first box body can be improved, which is beneficial to improving the use reliability of the battery.

[0060] In one embodiment, the plate body part is provided with a heat exchange channel for the heat exchange medium to flow through.

[0061] By adopting the technical solution of this embodiment, the heat exchange channel can realize the temperature control of the battery cell, which is beneficial to improving the performance of the battery cell and the battery.

[0062] In one embodiment, the plate body portion further includes a first plate body sub-portion and a second plate body sub-portion that are connected to each other. The first plate body sub-portion and the second plate body sub-portion are stacked along the direction in which the plate body portion faces the accommodation space; at least one of the first plate body sub-portion and the second plate body sub-portion is recessed away from the other to form a heat exchange channel.

[0063] By adopting the technical solution of this embodiment, the structure of the plate body portion is simple, which is beneficial to reducing the manufacturing cost of the battery box.

[0064] In a second aspect, a method for manufacturing a battery box is provided. The method for manufacturing a battery box is used to manufacture the battery box as described in the above embodiment; the method for manufacturing a battery box includes the following steps: bending the edge portion of the plate member toward the accommodation space to form a plate body portion and a first bent portion.

[0065] In the method for manufacturing a battery box according to the embodiment of the present application, the edge portion of the plate member is bent to obtain a bent portion and a plate body portion by bending; compared with the box body formed by blow molding, the bending radius of the edge portion of the plate member bent by bending is small, which can reduce the width dimension of the first box body, reduce the width dimension of the battery box, reduce the occupied space of the battery in the electrical device, and is beneficial to improving the structural compactness and service performance of the electrical device.

[0066] In one embodiment, the method for manufacturing a battery box specifically includes the following method: roll bending the edge portion of the plate member to form a plate body portion and a first bent portion.

[0067] By adopting the technical solution of this embodiment, the edge portion of the plate member can be bent by rolling or by a bending machine. Its manufacturing method is simple. In addition, compared with the box body formed by blow molding, the bending radius of the edge portion of the plate member bent by roll bending is small, which can reduce the width dimension of the first box body, reduce the width dimension of the battery box, reduce the occupied space of the battery in the electrical device, and is beneficial to improving the structural compactness and service performance of the electrical device.

[0068] In one embodiment, the plate body portion further includes a first plate body sub-portion and a second plate body sub-portion that are connected to each other. The first plate body sub-portion and the second plate body sub-portion are stacked along the direction in which the plate body portion faces the accommodation space; at least one of the first plate body sub-portion and the second plate body sub-portion is recessed away from the other by blow molding to form a heat exchange channel for the heat exchange medium to flow through.

[0069] By adopting the technical solution of this embodiment, the recesses of the first plate body sub-portion and the second plate body sub-portion can be formed into a heat exchange channel by blow molding or stamping. Among them, compared with other methods, the thickness of the first plate body sub-portion and the second plate body sub-portion can be set smaller by blow molding, so that the mass of the first box body is smaller.

[0070] In a third aspect, a battery is provided, including a battery box as in the above embodiment and at least one battery cell. The battery cell is accommodated in the accommodation space. Alternatively, the battery includes a battery box obtained by using the battery box manufacturing method as in the above embodiment and at least one battery cell, and the battery cell is accommodated in the accommodation space.

[0071] For the battery of the embodiment of the present application, by using the above battery box or the battery box obtained by using the above battery box manufacturing method, the width dimension of the first box body is reduced, and the width dimension of the battery box is small, reducing the occupied space of the battery in the electrical device, which is beneficial to improving the structural compactness and service performance of the electrical device.

[0072] In a fourth aspect, an electrical device is provided, including a battery as in the above embodiment.

[0073] For the electrical device of the embodiment of the present application, by using the above battery, the width dimension of the first box body is reduced, and the width dimension of the battery box is small, reducing the occupied space of the battery in the electrical device, which is beneficial to improving the structural compactness and service performance of the electrical device.

[0074] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. Description of the Drawings

[0075] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0076] Figure 1 It is a schematic structural diagram of a vehicle provided for an embodiment of the present application.

[0077] Figure 2 It is a schematic structural diagram of a battery from a first perspective provided for another embodiment of the present application.

[0078] Figure 3 For Figure 2 The exploded schematic diagram of the battery shown.

[0079] Figure 4 For Figure 3 The schematic structural diagram of the second perspective of the first box body shown.

[0080] Figure 5 For Figure 3Schematic structural diagram of the first box body shown from the third perspective.

[0081] Figure 6 is the sectional view along the Figure 5 A-A line in

[0082] Figure 7 is Figure 6 the partial enlarged view at B in

[0083] Figure 8 is Figure 2 the schematic structural diagram of the battery shown from the fourth perspective.

[0084] Figure 9 is the sectional view along the Figure 8 C-C line in

[0085] Figure 10 is Figure 9 the partial enlarged view at D in

[0086] Figure 11 is Figure 4 the exploded view of the first box body shown.

[0087] Figure 12 This is the sectional view of the first box body provided by another embodiment of the present application along the Figure 5 A-A line in

[0088] Figure 13 is Figure 12 the partial enlarged view at E in

[0089] Among them, the reference numerals in the figure are as follows:

[0090] 1000, vehicle; 1100, battery; 1200, controller; 1300, motor; 100, battery box; 110, first box body; 1101, accommodation space; 1102, heat exchange channel; 111, plate member; 1111, plate body part; 11111, first plate body sub-part; 11112, second plate body sub-part; 1112, first bending part; 11121, bending arc segment; 11122, first connecting segment; 1113, second bending part; 11131, bending semi-circular segment; 11132, second connecting segment; 1114, strengthening part; 11141, first strengthening segment; 11142, second strengthening segment; 11143, third strengthening segment; 11144, fourth strengthening segment; 11145, cavity; 11146, first connecting hole; 1115, third bending part; 1116, fourth bending part; 112, first sealing plate; 113, second sealing plate; 114, mounting beam; 115, first module beam; 116, second module beam; 120, second box body; 130, seal; 140, fastener; 200, battery cell. Detailed implementation manners

[0091] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer and more understandable, the following further details this application in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0092] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above description of the accompanying drawings are intended to cover non-exclusive inclusion.

[0093] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0094] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of this application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments in any suitable manner.

[0095] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0096] In the description of the embodiments of this application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces). The meaning of "several" is one or more, unless otherwise specifically defined.

[0097] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present application.

[0098] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "install", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0099] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0100] In the present application, a battery refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the batteries mentioned in the present application can include battery modules or battery packs, etc. Some batteries can include a battery case for encapsulating one or more battery cells or multiple battery modules, and the battery case can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells or battery modules.

[0101] In the present application, the battery cell can include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the embodiments of the present application do not limit this. The battery cell can be in a cylindrical shape, a flat shape, a cuboid shape or other shapes, and the embodiments of the present application do not limit this either. Generally, battery cells are divided into three types according to the encapsulation method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this either.

[0102] The casing of the battery box is usually formed by blow molding. For the casing formed by blow molding, a relatively large bending fillet needs to be provided at the edge. However, a relatively large bending fillet will increase the external dimension of the casing, resulting in an over-sized external dimension of the casing. In the electrical device for battery installation, a relatively large installation space is required, and the space occupancy rate of the battery in the electrical device is high, which affects the structural compactness and performance of the electrical device.

[0103] Based on this, an embodiment of the present application provides a battery box. The plate member of the battery box includes a plate body portion and a first bending portion. The first bending portion bends from the edge of the plate body portion towards the accommodation space. The edge of the plate member is bent to obtain a bending portion and a plate body portion. Compared with blow molding, the radius of the bending fillet of the bent edge of the plate member can be set smaller, so as to reduce the edge dimension of the plate member, reduce the external dimension of the battery box, reduce the occupied space of the battery in the electrical device, and is beneficial to improving the structural compactness and performance of the electrical device.

[0104] The battery box, battery and electrical device using the battery as a power source disclosed in the embodiments of the present application. The electrical device can be, but is not limited to, mobile phones, tablets, laptop computers, electric toys, power tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, for example, game consoles, electric vehicle toys, electric ship toys and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles and spaceships, etc.

[0105] For the convenience of description in the following embodiments, a vehicle 1000 of an embodiment of the present application is taken as an example for description.

[0106] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 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 1100 is provided inside the vehicle 1000. The battery 1100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery 1100 can be used for the power supply of the vehicle 1000. For example, the battery 1100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery 1100 to supply power to the motor 1300. For example, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0107] In some embodiments of the present application, the battery 1100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0108] Please refer to Figure 2 Figure 2 , as an embodiment of the battery 1100, the battery 1100 includes a battery box 100 and battery cells 200, and the battery cells 200 are accommodated in the battery box 100. Among them, the battery box 100 is used to provide an accommodation space 1101 for the battery cells 200, and the battery box 100 can adopt various structures. In some embodiments, the battery box 100 may include a first box body 110 and a second box body 120, the first box body 110 and the second box body 120 are covered with each other, and the first box body 110 and the second box body 120 jointly define an accommodation space 1101 for accommodating the battery cells 200. The first box body 110 may be a plate-like structure, and the second box body 120 may be a hollow structure with an opening at one end. The first box body 110 is covered on the opening side of the second box body 120 so that the first box body 110 and the second box body 120 jointly define the accommodation space 1101. Of course, the box body formed by the first box body 110 and the second box body 120 can be of various shapes, such as a cylinder, a cuboid, etc. Of course, in other embodiments, the battery box 100 may not include the second box body 120, and the battery box 100 is directly fixed in the vehicle 1000 through the first box body 110.

[0109] In the battery 1100, there may be multiple battery cells 200, and the multiple battery cells 200 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection means that there are both series and parallel connections among the multiple battery cells 200.

[0110] In one embodiment, the multiple battery cells 200 can be directly connected in series, in parallel, or in a hybrid connection together, and then the whole formed by the multiple battery cells 200 is accommodated in the battery box 100; of course, the battery 1100 can also be in the form of multiple battery cells 200 first connected in series, in parallel, or in a hybrid connection to form a battery 1100 module, and then multiple battery 1100 modules are connected in series, in parallel, or in a hybrid connection to form a whole and are accommodated in the box body. The battery 1100 may further include other structures. For example, the battery 1100 may further include a busbar component for realizing the electrical connection among the multiple battery cells 200.

[0111] Among them, each battery cell 200 can be a secondary battery 1100 or a primary battery 1100; it can also be a lithium-sulfur battery 1100, a sodium-ion battery 1100, or a magnesium-ion battery 1100, but is not limited thereto. The battery cell 200 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0112] Please also refer to Figures 4 - 7As shown, in an embodiment of the present application, a battery box 100 is provided. The battery box 100 includes a first box body 110. The first box body 110 includes a plate member 111. One side of the plate member 111 has a receiving space 1101 for receiving battery cells 200. The plate member 111 includes a plate body portion 1111 and a first bending portion 1112. The first bending portion 1112 bends from the edge of the plate body portion 1111 towards the receiving space 1101.

[0113] The plate member 111 may refer to a plate-like component in the first box body 110. Specifically, the plate member 111 may refer to the bottom plate in the battery box 100 located below the battery cells 200 and used to carry the battery cells 200, or may refer to the top plate in the battery box 100 located above the battery cells 200.

[0114] The receiving space 1101 may refer to the space in the battery box 100 for receiving the battery cells 200. Specifically, the receiving space 1101 may be formed jointly by enclosing after the first box body 110 and the second box body 120 are connected; or the receiving space 1101 may be formed separately by enclosing the first box body 110.

[0115] The plate member 111 includes a plate body portion 1111 and a first bending portion 1112. The first bending portion 1112 bends from the edge of the plate body portion 1111 towards the receiving space 1101. It can be understood that after the edge of the plate member 111 bends towards the receiving space 1101, the plate member 111 is divided into the plate body portion 1111 and the first bending portion 1112 with the bending position as the boundary. The plate body portion 1111 may refer to the main body portion of the plate member 111, and the first bending portion 1112 may refer to the portion formed after the edge of the plate member 111 bends. Specifically, after the first bending portion 1112 bends towards the receiving space 1101, the first bending portion 1112 can be connected to the second box body 120 or a component in the vehicle 1000 to facilitate the connection between the plate member 111 and the second box body 120 or the vehicle 1000. In an embodiment, the edge of the plate member 111 can be bent by means of rolling or by a bending machine. The plate member 111 can be but is not limited to a steel plate.

[0116] Among them, the first box body 110 has a length direction, a width direction, and a height direction. The length direction of the first box body 110 can be referred to as the X direction in the figure, the width direction of the first box body 110 can be referred to as the Y direction in the figure, and the height direction of the first box body 110 can be referred to as the Z direction in the figure. Among them, for the convenience of understanding and description, in the embodiments provided in the present application, only the edge of the plate member 111 along the width direction (which can be referred to as the X direction in the figure) bends to form the plate body portion 1111 and the first bending portion 1112 for illustration. It should be understood that the embodiments provided in the present application are also applicable to bending the width direction of the plate member 111 to form the plate body portion 1111 and the first bending portion 1112.

[0117] The battery box 100 according to the embodiment of the present application. The first box body 110 of the battery box 100 includes a plate member 111. One side of the plate member 111 has a receiving space 1101 for receiving battery cells 200. The plate member 111 includes a plate body portion 1111 and a first bending portion 1112. The first bending portion 1112 is bent from the edge of the plate body portion 1111 towards the receiving space 1101, so that the edge of the plate member 111 is bent to obtain a bending portion and a plate body portion 1111. Compared with the box body formed by blow molding, the bending radius of the edge of the plate member 111 is small, which can reduce the width dimension of the first box body 110, reduce the width dimension of the battery box 100, reduce the occupied space of the battery 1100 in the electrical device, and is beneficial to improving the structural compactness and service performance of the electrical device.

[0118] In another embodiment of the present application, in combination with Figure 7 As shown, the first bending portion 1112 includes a bending arc section 11121 and a first connecting section 11122. The bending arc section 11121 is connected between the first connecting section 11122 and the plate body portion 1111.

[0119] The first connecting section 11122 may refer to the part of the plate member 111 that forms a certain angle with the plate body portion 1111.

[0120] The bending arc section 11121 may refer to the arc portion formed after the edge of the plate member 111 is bent. The bending arc section 11121 is connected between the first connecting section 11122 and the plate body portion 1111.

[0121] By adopting the technical solution of this embodiment, the first connecting section 11122 and the plate body portion 1111 are connected by an arc transition through the bending arc section 11121, which is beneficial to reducing stress concentration, the edge structure strength of the plate member 111 is good, and the protection effect of the first box body 110 on the battery cell 200 is good.

[0122] Generally, the bending radius of the edge of the box body formed by blow molding is usually greater than or equal to 5 mm.

[0123] In another embodiment of the present application, in combination with Figure 7 As shown, the thickness of the first connecting section 11122 is t, and the radius of the bending arc section 11121 is R, where 0.8 ≤ R / t ≤ 2.

[0124] For example, the plate member 111 is made of an equal-thickness plate. The thickness of the first connecting section 11122 formed after the plate member 111 is bent is equal to the thickness of the plate member 111, that is, the thickness of the first connecting section 11122 may refer to the thickness of the plate member 111.

[0125] The radius of the bent arc segment 11121 may refer to the radius of the inner arc surface of the bent arc segment 11121 facing the accommodation space 1101, or the radius of the bending fillet of the first bent portion 1112.

[0126] By adopting the technical solution of this embodiment, the design of 0.8 ≤ R / t ≤ 2 can limit the bending fillet radius of the first bent portion 1112 within a relatively small and reasonable range. On the one hand, the width of the first box body 110 can be made smaller; on the other hand, the bending operation of the first bent portion 1112 is easy and simple.

[0127] In another embodiment of the present application, in combination with Figure 7 as shown, 1 ≤ R / t ≤ 1.5.

[0128] By adopting the technical solution of this embodiment, the design of 1 ≤ R / t ≤ 1.5 can limit the bending fillet radius of the first bent portion 1112 within a relatively small and more reasonable range. On the one hand, the width of the first box body 110 can be made smaller; on the other hand, the bending operation of the first bent portion 1112 is also easier and simpler.

[0129] In one embodiment, the value of R / t can be, but is not limited to, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.

[0130] Generally, for the box body solution of blow molding and stamping, there are two bending fillets at the edge of the box body, and the radius of the bending fillet is 5 mm. In addition, in order to facilitate demolding, the bent edge of the blow-molded box body usually has a demolding slope of 1.5° - 3°, resulting in the bent edge usually occupying a relatively large bending space of the first box body 110.

[0131] In another embodiment of the present application, in combination with Figure 7 as shown, the radius of the bent arc segment 11121 is R, where 0.5 mm ≤ R ≤ 4 mm.

[0132] By adopting the technical solution of this embodiment, the design of 0.5 mm ≤ R ≤ 4 mm makes the radius of the bending fillet of the first bent portion 1112 smaller than that of the blow-molded box body, reducing the width of the first box body 110. In addition, the first bent portion 1112 has a certain bending fillet, making the bending operation of the first bent portion 1112 easy and simple, and can also reduce the risk of damage such as fracture caused by excessive bending of the first bent portion 1112, which is beneficial to improving the structural strength of the first box body 110.

[0133] In another embodiment of the present application, in combination with Figure 7 as shown, 1 mm ≤ R ≤ 2 mm.

[0134] By adopting the technical solution of this embodiment, the design with 1mm ≤ R ≤ 2mm makes the radius of the bending fillet of the first bending part 1112 smaller than that of the box body formed by blow molding, effectively reducing the width of the first box body 110. In addition, the first bending part 1112 has an appropriate bending fillet, making the bending operation of the first bending part 1112 easier and simpler, and can also reduce the risk of damage such as fracture caused by excessive bending of the first bending part 1112, which is beneficial to improving the structural strength of the first box body 110.

[0135] In one embodiment, the value of R can be but is not limited to 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm.

[0136] In another embodiment of the present application, in combination with Figure 7 as shown, the included angle between the first connecting section 11122 and the plate body part 1111 is α, where 85° ≤ α ≤ 95°.

[0137] By adopting the technical solution of this embodiment, the first connecting section 11122 is perpendicular or nearly perpendicular to the plate body part 1111, which can reduce the width dimension of the first box body 110, reduce the width of the battery box 100, reduce the occupied space of the battery 1100 in the electrical device, and is beneficial to improving the structural compactness and service performance of the electrical device.

[0138] In another embodiment of the present application, in combination with Figure 7 as shown, 89° ≤ α ≤ 91°.

[0139] By adopting the technical solution of this embodiment, the design with 89° ≤ α ≤ 91° makes the width of the plate member 111 smaller than that of the box body formed by blow molding, which can effectively reduce the width dimension of the first box body 110, reduce the width of the battery box 100, reduce the occupied space of the battery 1100 in the electrical device, and is beneficial to improving the structural compactness and service performance of the electrical device.

[0140] In one embodiment, the value of α can be but is not limited to 85°, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93°, 94°, 95°.

[0141] Generally speaking, the edge of the blow molding usually has a parallel section parallel to the width direction of the box body, which will greatly increase the width of the box body, resulting in a large width of the box body.

[0142] In another embodiment of the present application, combined with Figure 7 As shown in FIG. 1 , the plate 111 further includes a second bending portion 1113, which is bent from the end of the first bending portion 1112 away from the plate body 1111 toward the plate body 1111, and is located on the side of the first bending portion 1112 facing away from the plate body 1111.

[0143] For example, after the edge of the plate 111 is bent toward the accommodation space 1101, it is bent toward the plate body 1111, so that the edge of the plate 111 forms a first bent portion 1112 and a second bent portion 1113, and the second bent portion 1113 is located on the side of the first bent portion 1112 facing away from the accommodation space 1101; the second bent portion 1113 is bent toward the plate body 1111 relative to the first bent portion 1112, so that the second bent portion 1113 is not parallel to the plate body 1111, which can reduce the size of the second bent portion 1113 in the width direction of the plate 111.

[0144] By adopting the technical solution of this embodiment, the second bending portion 1113 is bent toward the plate body 1111 relative to the first bending section. Compared with the box body formed by inflation molding, the second bending portion 1113 is not parallel to the plate body 1111, which can reduce the size of the second bending portion 1113 in the width direction of the plate 111, reduce the width of the first box body 110, reduce the width of the battery box 100, and reduce the space occupied by the battery 1100 in the electrical device, which is conducive to improving the structural compactness and performance of the electrical device.

[0145] In another embodiment of the present application, combined with Figure 7 As shown in FIG. 1 , the second bending portion 1113 includes a bending semicircular segment 11131 and a second connecting segment 11132. One end of the bending semicircular segment 11131 is connected to the end of the first bending portion 1112 away from the plate body 1111, and the other end of the bending semicircular segment 11131 is connected to one end of the second connecting segment 11132.

[0146] The second bending portion 1113 is bent 180° relative to the first bending portion 1112 toward the plate body 1111, thereby forming a bent semicircular segment 11131 and a second connecting segment 11132. The bent semicircular segment 11131 may refer to a semicircular portion formed by bending the plate 111 180°, and the second connecting segment 11132 may refer to a portion of the plate 111 that is connected to the end of the bent semicircular segment 11131 away from the first bending portion 1112 and is located on the side of the first bending portion 1112 facing away from the first bending portion 1112. ​​​​

[0147] Exemplarily, the end of the first connecting section 11122 facing away from the plate body portion 1111 is connected to one end of the bent semi-circular section 11131, the other end of the bent semi-circular section 11131 is connected to the second connecting section 11132, and the second connecting section 11132 and the second connecting section 11132 are arranged in parallel, that is, the first connecting section 11122 and the second connecting section 11132 are arranged in parallel and stacked in the width direction of the plate member 111, so that the width of the first box body 110 can be effectively reduced.

[0148] By adopting the technical solution of this embodiment, the setting of the bent semi-circular section 11131 causes the edge of the plate member 111 to be bent by 180°, so that the first bent portion 1112 and the second bent portion 1113 can form a stacked structure in the width direction of the plate member 111. Compared with the box body formed by blow molding, the width of the first box body 110 can be effectively reduced, the width of the battery box 100 is reduced, the occupied space of the battery 1100 in the electrical device is reduced, which is beneficial to improving the structural compactness and service performance of the electrical device; in addition, the stacked structure can also improve the structural strength of the edge of the plate member 111, which is beneficial to improving the protection effect of the battery box 100 on the battery cell 200 and is also beneficial to improving the structural reliability of the battery 1100.

[0149] In another embodiment of the present application, in combination with Figure 7 as shown, the second connecting section 11132 is attached to the first bent portion 1112.

[0150] It can be understood that the surface of the first connecting section 11122 facing away from the plate body portion 1111 in the width direction of the plate member 111 is attached to the second connecting section 11132, so that there is no gap between the first connecting section 11122 and the second connecting section 11132. Of course, in other embodiments, there may be a gap between the first connecting section 11122 and the second connecting section 11132.

[0151] By adopting the technical solution of this embodiment, there is no gap between the second connecting section 11132 and the first bent portion 1112, so that the width of the first box body 110 is smaller, the width of the battery box 100 is reduced, the occupied space of the battery 1100 in the electrical device is reduced, which is beneficial to improving the structural compactness and service performance of the electrical device; in addition, the combination of the second connecting section 11132 and the first bent portion 1112 can also improve the structural strength of the edge of the plate member 111, which is beneficial to improving the protection effect of the battery box 100 on the battery cell 200 and is also beneficial to improving the structural reliability of the battery 1100.

[0152] In another embodiment of the present application, in combination with Figure 7As shown, the plate 111 further includes a reinforcing portion 1114, one end of which is connected to the end of the second bent portion 1113 close to the plate body 1111, and the other end of which is connected to the surface of the plate body 1111 facing away from the accommodation space 1101.

[0153] The reinforcement portion 1114 may refer to a portion of the plate 111 that is connected between the surface of the plate body 1111 facing away from the accommodation space 1101 and the second bent portion 1113. For example, the reinforcement portion 1114 is located on the side of the plate body 1111 facing away from the accommodation space 1101. After being bent multiple times, the reinforcement portion 1114 is connected to the surface of the plate body 1111 facing away from the accommodation space 1101.

[0154] By adopting the technical solution of this embodiment, the reinforcing portion 1114 is located on the side of the plate portion 1111 facing away from the accommodating space 1101, so that the reinforcing portion 1114 can support the plate portion 1111, thereby improving the structural strength of the first box body 110, improving the protective effect of the battery box 100 on the battery cell 200, and improving the structural reliability of the battery 1100.

[0155] In another embodiment of the present application, combined with Figure 7 As shown in FIG. 1 , the reinforcing portion 1114 and the plate portion 1111 are arranged to form a cavity 11145.

[0156] The cavity 11145 may refer to a cavity formed by the reinforcing portion 1114 and the plate portion 1111. For example, the cavity sidewall of the cavity 11145 close to the second connecting segment 11132 may also be flush with the side of the second connecting segment 11132 facing the first connecting segment 11122, or may be offset from the side of the second connecting segment 11132 facing the first connecting segment 11122.

[0157] By adopting the technical solution of this embodiment, the reinforcement part 1114 and the plate part 1111 are surrounded to form a cavity 11145, so that the reinforcement part 1114 and the plate part 1111 form a cavity structure, which also effectively improves the structural strength of the first box body 110, improves the protection effect of the battery box 100 on the battery cell 200, and improves the structural reliability of the battery 1100; in addition, the cavity 11145 can be used as a space for the connection between the first box body 110 and other components (for example: the second box body 120 or the chassis of the vehicle 1000, etc.), so as to improve the structural compactness of the battery box 100.

[0158] In another embodiment of the present application, combined with Figure 7 ​​​As shown, the reinforcing portion 1114 includes a first reinforcing segment 11141, a second reinforcing segment 11142, and a third reinforcing segment 11143 that are sequentially connected. One end of the first reinforcing segment 11141 facing away from the second reinforcing segment 11142 is connected to the end of the second bending portion 1113 close to the plate body portion 1111, and one end of the third reinforcing segment 11143 facing away from the second reinforcing segment 11142 is connected to the surface of the plate body portion 1111 facing away from the accommodating space 1101. The second reinforcing segment 11142 is spaced apart from the surface of the plate body portion 1111 facing away from the accommodating space 1101, so that the first reinforcing segment 11141, the second reinforcing segment 11142, the third reinforcing segment 11143, and the plate body portion 1111 jointly enclose a cavity 11145.

[0159] The reinforcing portion 1114 is bent twice. The reinforcing portion 1114 is divided into a first reinforcing segment 11141, a second reinforcing segment 11142, and a third reinforcing segment 11143 according to the two bending positions. The first reinforcing segment 11141 can refer to a section of the reinforcing portion 1114 that is connected to the end of the second bending portion 1113 close to the plate body portion 1111. The third reinforcing segment 11143 can refer to a section of the reinforcing portion 1114 that is connected to the surface of the plate body portion 1111 facing away from the accommodating space 1101. The second reinforcing segment 11142 can refer to the part of the reinforcing portion 1114 that is connected between the first reinforcing segment 11141 and the third reinforcing segment 11143. The second reinforcing segment 11142 is spaced apart from the surface of the plate body portion 1111 facing away from the accommodating space 1101, so that the surfaces of the first reinforcing segment 11141 and the third reinforcing segment 11143 facing each other and the surfaces of the plate body portion 1111 and the second reinforcing segment 11142 facing each other jointly form a cavity 11145.

[0160] Exemplarily, the first reinforcing segment 11141 and the second connecting segment 11132 are in the same plane. The first reinforcing segment 11141 is located on the side of the plate body portion 1111 facing away from the accommodating space 1101. The first reinforcing segment 11141 and the second connecting segment 11132 are in the plane where the surface of the plate body portion 1111 facing away from the accommodating space 1101 is located (for reference, see Figure 7It is divided by the plane perpendicular to the paper surface where the dotted line A' is located. The second strengthening section 11142 is vertically bent from the end of the first strengthening section 11141 facing away from the second connecting section 11132 towards the plate body section 1111, so that the second strengthening section 11142 is arranged in parallel and spaced from the surface of the plate body section 1111 facing away from the accommodating space 1101. The third strengthening section 11143 is vertically bent from the second strengthening section 11142 facing away from the first strengthening section 11141 towards the plate body section 1111, so that the first strengthening section 11141 and the third strengthening section 11143 are respectively vertically connected to both ends of the second strengthening section 11142, and the first strengthening section 11141, the second strengthening section 11142, the third strengthening section 11143 and the plate body section 1111 jointly enclose a rectangular cavity 11145. With such a layout, the structure of the strengthening part 1114 is simple and regular, which is beneficial to processing and manufacturing. In addition, the strengthening part 1114 and the plate body section 1111 form a rectangular cavity structure, which can play a good role in supporting and fixing the plate body section 1111 and improve the structural strength of the first box body 110.

[0161] By adopting the technical solution of this embodiment, the strengthening part 1114 adopts the structural form of the first strengthening section 11141, the second strengthening section 11142 and the third strengthening section 11143, and its structure is simple and convenient for processing and manufacturing.

[0162] In another embodiment of the present application, in combination with Figure 7 As shown, the strengthening part 1114 further includes a fourth strengthening section 11144. One end of the fourth strengthening section 11144 is connected to the end of the third strengthening section 11143 facing away from the second strengthening section 11142, and the fourth strengthening section 11144 is attached to the surface of the plate body section 1111 facing away from the accommodating space 1101.

[0163] The fourth strengthening section 11144 may refer to the part of the strengthening part 1114 that is attached to the surface of the accommodating space 1101; among them, the fourth strengthening section 11144 can be bent from the third strengthening section 11143 towards the cavity 11145 or away from the accommodating bend.

[0164] By adopting the technical solution of this embodiment, the fourth strengthening section 11144 is attached to the surface of the plate body section 1111 facing away from the accommodating space 1101, which can effectively support the plate body section 1111, effectively improve the structure of the first box body 110, and thus greatly increase the structural strength of the battery box 100, which is beneficial to improving the use reliability of the battery 1100.

[0165] In another embodiment of the present application, in combination with Figures 7 - 10 As shown, the battery box 100 further includes a second box body 120. The second box body 120 is hermetically connected to the second bending part 1113, and the first box body 110 and the second box body 120 enclose an accommodating space 1101.

[0166] The second box body 120 may refer to the box body in the battery box 100 that is connected to the first box body 110 to enclose and form an accommodation space 1101. The second box body 120 and the second bending part 1113 can be hermetically connected by means of sealant, sealing ring, sealing strip, etc.

[0167] By adopting the technical solution of this embodiment, the second bending part 1113 is located outside the first box body 110. The hermetic connection between the second box body 120 and the second bending part 1113 is simple and convenient. In addition, the surface of the second bending part 1113 facing away from the plate body part 1111 has a large area, which can increase the sealing area and improve the sealing performance between the second box body 120 and the second bending part 1113.

[0168] In another embodiment of the present application, as shown in combination Figures 7 - 10 The second bending part 1113 is located inside the second box body 120, and a seal 130 is provided between the surface of the second bending part 1113 facing away from the plate body part 1111 and the inner wall surface of the second box body 120.

[0169] The seal 130 may refer to a sealing component located between the surface of the second bending part 1113 facing away from the plate body part 1111 and the inner wall surface of the second box body 120. Exemplarily, the seal 130 can be but is not limited to a sealing ring or a sealing strip. The seal 130 can be made of elastic plastic, and the elastic plastic can be but is not limited to rubber or silica gel. In one embodiment, the seal 130 is clamped between the surface of the second bending part 1113 facing away from the plate body part 1111 and the inner wall surface of the second box body 120, and the seal 130 has a certain compression amount, so as to fill the gap between the surface of the second bending part 1113 facing away from the plate body part 1111 and the inner wall surface of the second box body 120, thereby realizing the hermetic connection between the second bending part 1113 and the second box body 120.

[0170] By adopting the technical solution of this embodiment, the surface of the second bending part 1113 facing away from the plate body part 1111 has a large area, and the seal 130 can be set larger, increasing the sealing area and improving the sealing performance between the second box body 120 and the second bending part 1113; in addition, the seal 130 is provided between the surface of the second bending part 1113 facing away from the plate body part 1111 and the inner wall surface of the second box body 120, the sealing structure is simple, the assembly operation is simple, which is beneficial to improving production efficiency.

[0171] In another embodiment of the present application, as shown in combination Figures 7 - 10As shown, the battery box 100 further includes a fastener 140. The reinforcing portion 1114 is configured with a first connection hole 11146 communicating with the cavity 11145. The fastener 140 passes through the first connection hole 11146 and is connected to the second box body 120, so that the seal 130 is clamped and fixed between the surface of the second bending portion 1113 facing away from the plate body portion 1111 and the inner wall surface of the second box body 120.

[0172] The first connection hole 11146 may refer to a through hole formed in the reinforcing portion 1114 and communicating with the cavity 11145. Specifically, the first reinforcing section 11141 may be provided with the first connection hole 11146, the second reinforcing section 11142 may also be provided with the first connection hole 11146, and the third reinforcing section 11143 may also be provided with the first connection hole 11146, which can be specifically set according to actual needs. The number of the first connection holes 11146 may be one or more, which can be specifically set according to actual needs.

[0173] The fastener 140 may refer to a component for fixedly connecting the second bending portion 1113 and the second box body 120. Specifically, the fastener 140 may include, but is not limited to, bolts, studs, screws, pins, rivets, and welding nails. In one embodiment, the fastener 140 includes a bolt and a nut. The second box body 120 covers the outside of the first box body 110. The first reinforcing section 11141 is provided with the first connection hole 11146. The bolt passes through the side portion of the second box body 120 and then through the first connection hole 11146 and is screwed with the nut, so that the first box body 110 and the second box body 120 are fixedly connected. At the same time, under the connection action of the fastener 140, the seal 130 can also be stably clamped and fixed between the second bending portion 1113 and the inner wall surface of the second box body 120 to achieve a sealed connection.

[0174] By adopting the technical solution of this embodiment, the reinforcing portion 1114 and the second box body 120 are connected through the fastener 140, and the connection structure is simple and convenient for processing and manufacturing. In addition, the seal 130 is clamped and fixed between the surface of the second bending portion 1113 facing away from the plate body portion 1111 and the inner wall surface of the second box body 120, so that the reinforcing portion 1114 is located outside the accommodation space 1101. In this way, setting the first connection hole 11146 in the reinforcing portion 1114 has little influence on the sealing performance of the accommodation space 1101, which is beneficial to improving the protection effect of the battery cell 200 and thus improving the use reliability of the battery 1100. And, the first connection hole 11146 communicates with the cavity 11145, and the cavity 11145 can provide an installation space for the fastener 140, which is also beneficial to improving the battery 1100.

[0175] In another embodiment of the present application, the reinforcing portion 1114 is provided with a mounting structure for fixing the battery box 100.

[0176] The mounting structure may refer to a structure constructed by the reinforcing part 1114 for connecting with an electrical device to fix the battery 1100 on the electrical device.

[0177] By adopting the technical solution of this embodiment, the mounting structure is arranged on the reinforcing part 1114 outside the accommodation space 1101, which has little influence on the sealing performance of the accommodation space 1101, is beneficial to improving the protection effect of the battery cell 200, and thus improves the use reliability of the battery 1100; in addition, the reinforcing part 1114 also has good structural strength, improving the stable reliability of the battery 1100 in the electrical device.

[0178] In another embodiment of the present application, the mounting structure includes a second connection hole, and the second connection hole communicates with the cavity 11145.

[0179] The second connection hole may refer to a through hole in the reinforcing part 1114 that communicates with the cavity 11145. Specifically, the first reinforcing section 11141 may be provided with a second connection hole, the second reinforcing section 11142 may also be provided with a second connection hole, and the third reinforcing section 11143 may also be provided with a second connection hole, which can be specifically set according to actual needs. The number of the second connection holes can be one or more, which can be specifically set according to actual needs. The first connection hole 11146 and the second connection hole can be the same through hole or different through holes, which can be specifically set according to actual needs. In one embodiment, the fastener 140 passes through the second connection hole to connect with the electrical device, realizing the fixation of the battery 1100 in the electrical device.

[0180] By adopting the technical solution of this embodiment, the mounting structure adopts the structural form of the second connection hole, which has a simple structure and is convenient for processing and manufacturing; in addition, the second connection hole communicates with the cavity 11145, so that the connecting piece for fixedly connecting the battery box 100 and the electrical device can be installed by using the space of the cavity 11145, making full use of the space in the first box body 110, which is beneficial to improving the structural compactness and use performance of the electrical device.

[0181] In another embodiment of the present application, as shown in Figure 6 the dimension of the plate body part 1111 is L in the direction of the first bending part 1112 facing the second bending part 1113 1 , and the dimension of the reinforcing part 1114 is L 2 , where 0.05 ≤ L 2 / L 1 ≤ 0.25.

[0182] The direction of the first bending part 1112 facing the second bending part 1113 may refer to the width direction of the first box body 110.

[0183] The dimension L of the plate body part 11111 It may refer to the width of the plate body portion 1111.

[0184] The dimension L of the reinforcing portion 1114 2 It may refer to the width of the reinforcing portion 1114.

[0185] L 2 / L 1 It may refer to the ratio of the width of the reinforcing portion 1114 to the width of the plate body portion 1111.

[0186] By adopting the technical solution of this embodiment, 0.05 ≤ L 2 / L 1 ≤ 0.25. Such a design makes the proportion of the reinforcing portion 1114 in the width direction of the plate body portion 1111 small. The reinforcing portion 1114 is arranged close to the edge of the plate body portion 1111, and the reinforcing portion 1114 can play a good role in strengthening and supporting the edge of the plate body portion 1111, improving the structural strength of the first box body 110 and the reliability of the battery 1100 when used in the electrical device.

[0187] In another embodiment of the present application, as shown in combination with Figure 6 0.1 ≤ L 2 / L 1 ≤ 0.2.

[0188] By adopting the technical solution of this embodiment, 0.1 ≤ L 2 / L 1 ≤ 0.2. Such a design enables the reinforcing portion 1114 to better support the edge of the plate body portion 1111, effectively improving the structural strength of the first box body 110 and the reliability of the battery 1100 when used in the electrical device.

[0189] In one embodiment, the value of L 2 / L 1 can be but is not limited to 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, 0.21, 0.22, 0.23, 0.24, 0.25.

[0190] In another embodiment of the present application, as shown in combination with Figure 4 and Figure 11 Both opposite edges of the plate body portion 1111 distributed in the first direction are provided with first bending portions 1112.

[0191] Exemplarily, the first direction may refer to the width direction of the first box body 110. Two first bending portions 1112 are obtained by bending both opposite edges of the plate member 111 in the width direction.

[0192] By adopting the technical solution of this embodiment, both opposite side portions of the plate member 111 are bent to obtain two first bent portions 1112. The bending fillet radii of the opposite side portions of the plate member 111 can be set to be relatively small, which can better reduce the width of the first box body 110 and the width of the battery box 100, and is beneficial to improving the structural compactness and service performance of the battery 1100 and the electrical device.

[0193] In another embodiment of the present application, in combination with Figure 4 and Figure 11 as shown, the plate member 111 further includes a third bent portion 1115 and a fourth bent portion 1116. The third bent portion 1115 is bent from one of the two side portions of the plate body portion 1111 distributed in the second direction towards the accommodation space 1101, and the fourth bent portion 1116 is bent from the other of the two side portions of the plate body portion 1111 distributed in the second direction towards the accommodation space 1101. The first direction and the second direction intersect.

[0194] Exemplarily, the second direction may refer to the length direction of the first box body 110. Both side portions of the plate member 111 distributed in the length direction are also bent to obtain the third bent portion 1115 and the fourth bent portion 1116 respectively.

[0195] By adopting the technical solution of this embodiment, both opposite side portions of the plate member 111 are bent to obtain the third bent portion 1115 and the fourth bent portion 1116 respectively. The bending fillet radii of the opposite side portions of the plate member 111 can be set to be relatively small, which can better reduce the length of the first box body 110 and the length of the battery box 100, and is beneficial to improving the structural compactness and service performance of the battery 1100 and the electrical device.

[0196] In another embodiment of the present application, in combination with Figure 4 and Figure 11 as shown, the first box body 110 further includes a first sealing plate 112 and a second sealing plate 113 for connecting with the plate member 111. The first sealing plate 112 is inserted between one end portion of the first bent portion 1112 and the third bent portion 1115, and the second sealing plate 113 is inserted between the other end portion of the first bent portion 1112 and the fourth bent portion 1116. The first sealing plate 112, the second sealing plate 113 and the plate member 111 enclose to form an accommodation space 1101.

[0197] The first sealing plate 112 may refer to a component inserted between one end of the first bending portion 1112 and the third bending portion 1115, and the second sealing plate 113 may refer to a component inserted between the other end of the first bending portion 1112 and the fourth bending portion 1116. The first sealing plate 112 and the second sealing plate 113 can be made of materials such as metal and plastic. The structures of the first sealing plate 112 and the second sealing plate 113 can be the same or different. Specifically, two first notches are formed between the two ends of the third bending portion 1115 and the two first bending portions 1112 respectively. The first sealing plate 112 is inserted into the two first notches, realizing the pre-positioning of the first sealing plate 112, which can facilitate the subsequent fixing operation of the first sealing plate 112; similarly, two second notches are formed between the two ends of the fourth bending portion 1116 and the two first bending portions 1112 respectively. The second sealing plate 113 is inserted into the two second notches, realizing the pre-positioning of the second sealing plate 113, which can facilitate the subsequent fixing operation of the second sealing plate 113.

[0198] By adopting the technical solution of this embodiment, the first sealing plate 112 is inserted between one end of the first bending portion 1112 and the third bending portion 1115, which can realize the pre-positioning of the first sealing plate 112 to facilitate the subsequent fixing operation; similarly, the second sealing plate 113 is inserted between the other end of the first bending portion 1112 and the fourth bending portion 1116, which can also realize the pre-positioning of the second sealing plate 113 to facilitate the subsequent fixing operation.

[0199] In one embodiment, the end of the second connecting section 11132 close to the first sealing plate 112 is welded to the first sealing plate 112, the edge of the third bending portion 1115 is welded to the first sealing plate 112, the end of the second connecting section 11132 close to the second sealing plate 113 is welded to the second sealing plate 113, and the edge of the fourth bending portion 1116 is welded to the second sealing plate 113, thereby realizing the fixed connection of the first sealing plate 112, the second sealing plate 113 and the plate member 111. Moreover, the fixed connection operation is simple and the connection reliability is good, which is beneficial to improving the structural reliability of the first box body 110; in addition, the first sealing plate 112, the second sealing plate 113 and the plate member 111 are connected by welding, which can also realize the sealed connection between the first sealing plate 112, the second sealing plate 113 and the plate member 111, and is beneficial to improving the sealing performance of the accommodating space 1101.

[0200] In another embodiment of the present application, in combination with Figure 3 、 Figure 4 and Figure 11As shown, the battery box 100 further includes a second box body 120. The two opposite side portions of the second box body 120 in the first direction are respectively connected to the two first bending portions 1112. One of the two opposite side portions of the second box body 120 in the second direction is connected to the first sealing plate 112, and the other of the two opposite side portions of the second box body 120 in the second direction is connected to the second sealing plate 113.

[0201] The two opposite sides of the second box body 120 are respectively connected to the two first bending portions 1112, and the other two opposite sides of the second box body 120 are respectively connected to the second sealing plate 113 and the third sealing plate, so that the first box body 110 and the second box body 120 jointly enclose a receiving space 1101. Exemplarily, the first sealing plate 112 and the second sealing plate 113 are perpendicular to the plate body portion 1111 and form a U-shaped structure. The second box body 120 is also in a U-shaped structure. The second box body 120 is inverted on the first box body 110. The first sealing plate 112 and the second sealing plate 113 seal the openings on the two opposite sides of the second box body 120. The edges of the first sealing plate 112 and the second sealing plate 113 are provided with connecting portions extending away from the receiving space 1101, and the connecting portions and the second box body 120 are fixedly connected by fasteners 140. The two opposite side portions of the second box body 120 are respectively connected to the reinforcing portions 1114 on both sides, so that the first box body 110 and the second box body 120 jointly enclose a receiving space 1101.

[0202] By adopting the technical solution of this embodiment, the two opposite sides of the second box body 120 are respectively connected to the two second bending portions 1113, and the other two opposite sides of the second box body 120 are respectively connected to the first sealing plate 112 and the second sealing plate 113, so that the first box body 110 and the second box body 120 enclose a receiving space 1101. The structure of the battery box 100 is simple and convenient for processing and manufacturing.

[0203] In another embodiment of the present application, in combination with Figure 4 and Figure 11 As shown, the first box body 110 further includes a plurality of mounting beams 114 for connecting to the plate body portion 1111. The plurality of mounting beams 114 are arranged at intervals in the second direction, and the first direction intersects with the second direction.

[0204] The mounting beam 114 may refer to a beam connected to the plate body portion 1111 and distributed at intervals in the second direction. The mounting beam 114 can be fixed on the electrical device to realize the mounting of the battery 1100. The number of the mounting beams 114 can be, but is not limited to, two, three, four, five. Exemplarily, the mounting beam 114 extends in the first direction, and three mounting beams 114 are arranged at intervals in the second direction. The plurality of mounting beams 114 can be arranged at equal intervals or at unequal intervals, and the specific arrangement can be set according to actual needs. Of course, in other embodiments, the mounting beam 114 can also extend in other directions.

[0205] By adopting the technical solution of this embodiment, the arrangement of multiple mounting beams 114 can strengthen the structural strength of the plate body part 1111, improve the structural strength of the first box body 110 in the width direction, and is beneficial to improving the use reliability of the battery 1100 and the electrical device.

[0206] In another embodiment of the present application, in combination with Figure 4 and Figure 11 as shown, multiple mounting beams 114 are located on the side of the plate body part 1111 facing away from the accommodation space 1101.

[0207] It can be understood that the mounting beam 114 is located outside the accommodation space 1101.

[0208] By adopting the technical solution of this embodiment, the mounting beam 114 is located outside the accommodation space 1101, and the mounting beam 114 does not occupy the space of the accommodation space 1101, so that the accommodation space 1101 can accommodate more battery cells 200, which is beneficial to improving the energy density of the battery 1100.

[0209] In another embodiment of the present application, in combination with Figure 3 , Figure 4 and Figure 11 as shown, the first box body 110 further includes a first module beam 115 and a second module beam 116 for connecting with the battery cell 200 and connecting with the plate member 111. The first module beam 115 and the second module beam 116 are located in the accommodation space 1101. The first module beam 115 is located at one of the two opposite edges of the plate body part 1111 along the second direction, and the second module beam 116 is located at the other of the two opposite edges of the plate body part 1111 along the second direction.

[0210] Module beams are provided on both of the two opposite edges of the plate body part 1111 along the second direction. One of the module beams is the first module beam 115, and the other module beam is the second module beam 116; the module beams are located in the accommodation space 1101, and the module beams are connected with the plate member 111 to realize the fixation of the module beams in the accommodation space 1101, while the module beams are connected with the battery cell 200, so that the module beams play a role in supporting and fixing the battery cell 200, which is beneficial to improving the use reliability of the battery 1100.

[0211] By adopting the technical solution of this embodiment, the first module beam 115 and the second module beam 116 can play a role in supporting and fixing the battery cell 200, and improve the use reliability of the battery 1100.

[0212] In another embodiment of the present application, in combination with Figure 4 and Figure 11As shown, in the second direction, the first mounting beam 114 is disposed opposite to the first module beam 115, and / or the last mounting beam 114 is disposed opposite to the second module beam 116.

[0213] Multiple mounting beams 114 are arranged in sequence in the second direction. The first mounting beam 114 is disposed opposite to the first module beam 115. The first mounting beam 114 and the first module beam 115 are located on opposite sides of the plate body portion 1111. One side portion of the plate body portion 1111 in the second direction is clamped between the first mounting beam 114 and the first module beam 115, which can increase the structural strength of the first housing 110 at the first module beam 115 and is beneficial to improving the structural strength of the first housing 110. Similarly, the last mounting beam 114 is disposed opposite to the second module beam 116. The last mounting beam 114 and the second module beam 116 are located on opposite sides of the plate body portion 1111. The other side portion of the plate body portion 1111 in the second direction can be clamped between the first mounting beam 114 and the second module beam 116, which can increase the structural strength of the first housing 110 at the second module beam 116 and is beneficial to improving the structural strength of the first housing 110.

[0214] In a possible implementation manner, in the second direction, the first mounting beam 114 is disposed opposite to the first module beam 115, which can increase the structural strength of the first housing 110 at the first module beam 115 and is beneficial to improving the structural strength of the first housing 110.

[0215] In a possible implementation manner, in the second direction, the last mounting beam 114 is disposed opposite to the second module beam 116, which can increase the structural strength of the first housing 110 at the second module beam 116 and is beneficial to improving the structural strength of the first housing 110.

[0216] In a possible implementation manner, in the second direction, the first mounting beam 114 is disposed opposite to the first module beam 115, and the last mounting beam 114 is disposed opposite to the second module beam 116, which can increase the structural strength of the opposite side portions of the first housing 110 in the second direction and can effectively improve the structural strength of the first housing 110.

[0217] By adopting the technical solution of this embodiment, the structural strength of the first housing 110 can be improved, which is beneficial to improving the use reliability of the battery 1100.

[0218] In another embodiment of the present application, in combination with Figure 12 and Figure 13 As shown, the plate body portion 1111 is provided with a heat exchange channel 1102 for the flow of the heat exchange medium.

[0219] It can be understood that the plate member 111 can be a heat exchange member. The heat exchange member can refer to a component that exchanges heat with the battery cell 200. Among them, the heat exchange channel 1102 can refer to a channel in the heat exchange member for the heat exchange medium to flow through; the part of the heat exchange member where the heat exchange channel 1102 is provided is the plate body part 1111. The edges on the opposite sides of the heat exchange member are bent to form the first bending part 1112, the second bending part 1113, and the strengthening part 1114. The edges on the other opposite sides of the heat exchange member are bent to form the third bending part 1115 and the fourth bending part 1116. During the process of the heat exchange medium flowing in the heat exchange channel 1102, the heat exchange medium can exchange heat with the battery cell 200, thereby realizing the temperature control of the battery cell 200. Among them, the heat exchange member can be, but is not limited to, a cold plate; the heat exchange medium can be, but is not limited to, air, water, or coolant. The plate member 111 can be made of materials with good thermal conductivity such as aluminum alloy or copper to meet the heat exchange requirements.

[0220] By adopting the technical solution of this embodiment, the heat exchange channel 1102 can realize the temperature control of the battery cell 200, which is beneficial to improving the performance of the battery cell 200 and the battery 1100.

[0221] In another embodiment of the present application, in combination with Figure 12 and Figure 13 as shown, the plate body part 1111 further includes a first plate body sub - part 11111 and a second plate body sub - part 11112 that are connected to each other. The first plate body sub - part 11111 and the second plate body sub - part 11112 are stacked along the direction of the plate body part 1111 facing the accommodation space 1101; at least one of the first plate body sub - part 11111 and the second plate body sub - part 11112 is recessed away from the other to form the heat exchange channel 1102.

[0222] The direction of the plate body part 1111 facing the accommodation space 1101 can refer to the height direction of the first box body 110.

[0223] The plate body part 1111 includes two parts stacked in the height direction of the first box body 110. One part is the first plate body sub - part 11111, and the other part is the second plate body sub - part 11112.

[0224] At least one of the first plate body sub - part 11111 and the second plate body sub - part 11112 is recessed away from the other to form a heat exchange channel 1102. It can be understood that the first space formed by the first plate body sub - part 11111 recessed away from the second plate body sub - part 11112 is the heat exchange channel 1102; or, the second space formed by the second plate body sub - part 11112 recessed away from the second plate body sub - part 11112 is the heat exchange channel 1102; or, the first space formed by the first plate body sub - part 11111 recessed away from the second plate body sub - part 11112 and the second space formed by the second plate body sub - part 11112 recessed away from the second plate body sub - part 11112 together form the heat exchange channel 1102. Specifically, the recesses of the first plate body sub - part 11111 and the second plate body sub - part 11112 can be used to form the heat exchange channel 1102 by means of blow - molding or stamping. Among them, compared with other methods, in the blow - molding method, the thickness of the first plate body sub - part 11111 and the second plate body sub - part 11112 can be set smaller, so that the mass of the first box body 110 is smaller.

[0225] By adopting the technical solution of this embodiment, the structure of the plate body part 1111 is simple, which is beneficial to reducing the manufacturing cost of the battery box 100.

[0226] The battery box 100 will be described below in conjunction with some embodiments.

[0227] Embodiment 1

[0228] In this embodiment, in combination with Figures 1 - 11 As shown, the battery box 100 includes a first box body 110 and a second box body 120. The first box body 110 covers the second box body 120 and encloses to form an accommodation space 1101. The first box body 110 includes a plate member 111. The two side portions of the plate member 111 distributed relatively along the first direction are formed into a first bending portion 1112, a second bending portion 1113 and a reinforcing portion 1114 by roll - pressing and bending. The part of the plate member 111 between the two first bending portions 1112 is the plate body part 1111, and the first bending portion 1112 bends from the side portion of the plate body part 1111 towards the accommodation space 1101.

[0229] In this embodiment, the first bending portion 1112 includes a bending arc segment 11121 and a first connection segment 11122. The bending arc segment 11121 is connected between the first connection segment 11122 and the plate body portion 1111. The second bending portion 1113 bends from the end of the first connection segment 11122 facing away from the plate body portion 1111 towards the plate body portion 1111, and the second bending portion 1113 is located on the side of the first connection segment 11122 facing away from the plate body portion 1111. The second bending portion 1113 includes a bending semi-circular segment 11131 and a second connection segment 11132. One end of the bending semi-circular segment 11131 is connected to the end of the first connection segment 11122 facing away from the plate body portion 1111, the other end of the bending semi-circular segment 11131 is connected to one end of the second connection segment 11132, and the second connection segment 11132 is attached to the first connection segment 11122. The reinforcing portion 1114 is connected from the end of the second connection segment 11132 close to the plate body portion 1111, and the other end of the reinforcing portion 1114 is connected to the surface of the plate body portion 1111 facing away from the accommodation space 1101. The reinforcing portion 1114 includes a first reinforcing segment 11141, a second reinforcing segment 11142, and a third reinforcing segment 11143 connected in sequence. The end of the first reinforcing segment 11141 facing away from the second reinforcing segment 11142 is connected to the end of the second connection segment 11132 close to the plate body portion 1111, and the end of the third reinforcing segment 11143 facing away from the second reinforcing segment 11142 is connected to the surface of the plate body portion 1111 facing away from the accommodation space 1101; the second reinforcing segment 11142 is spaced from the surface of the plate body portion 1111 facing away from the accommodation space 1101, and the first reinforcing segment 11141, the second reinforcing segment 11142, the third reinforcing segment 11143, and the plate body portion 1111 jointly enclose a cavity 11145. The reinforcing portion 1114 further includes a fourth reinforcing segment 11144. One end of the fourth reinforcing segment 11144 is connected to the end of the third reinforcing segment 11143 facing away from the second reinforcing segment 11142, and the fourth reinforcing segment 11144 is attached to the surface of the plate body portion 1111 facing away from the accommodation space 1101.

[0230] In this embodiment, the first connecting section 11122 is perpendicular to the plate body section 1111. The second connecting section 11132 is in contact with the first connecting section 11122. The first reinforcing section 11141 and the second connecting section 11132 are in the same plane. The first reinforcing section 11141 is located on the side of the plate body section 1111 facing away from the accommodating space 1101. The first reinforcing section 11141 and the second connecting section 11132 are divided by the plane where the surface of the plate body section 1111 facing away from the accommodating space 1101 is located. The second reinforcing section 11142 is perpendicularly bent from the end of the first reinforcing section 11141 facing away from the second connecting section 11132 towards the plate body section 1111, so that the second reinforcing section 11142 is arranged in parallel and spaced from the surface of the plate body section 1111 facing away from the accommodating space 1101. The third reinforcing section 11143 is perpendicularly bent from the second reinforcing section 11142 facing away from the first reinforcing section 11141 towards the plate body section 1111, so that the first reinforcing section 11141 and the third reinforcing section 11143 are respectively perpendicularly connected to both ends of the second reinforcing section 11142. Moreover, the first reinforcing section 11141, the second reinforcing section 11142, the third reinforcing section 11143 and the plate body section 1111 jointly enclose a rectangular cavity 11145. With such a layout, the structure of the reinforcing part 1114 is simple and regular, which is beneficial to processing and manufacturing. In addition, the reinforcing part 1114 and the plate body section 1111 form a rectangular cavity structure, which can play a good role in supporting and fixing the plate body section 1111 and improve the structural strength of the first box body 110.

[0231] In this embodiment, two opposite side portions of the plate member 111 in the second direction are bent towards the accommodation space 1101 to form a third bent portion 1115 and a fourth bent portion 1116 respectively. The first box body 110 further includes a first sealing plate 112 and a second sealing plate 113. Two first notches are formed between the two ends of the third bent portion 1115 and the two first bent portions 1112 respectively. The first sealing plate 112 is inserted into the two first notches, realizing the pre-positioning of the first sealing plate 112, which facilitates the subsequent fixing operation of the first sealing plate 112. Similarly, two second notches are formed between the two ends of the fourth bent portion 1116 and the two first bent portions 1112 respectively. The second sealing plate 113 is inserted into the two second notches, realizing the pre-positioning of the second sealing plate 113, which facilitates the subsequent fixing operation of the second sealing plate 113. The end portion of the second connecting section 11132 close to the first sealing plate 112 is welded to the first sealing plate 112, the edge of the third bent portion 1115 is welded to the first sealing plate 112, the end portion of the second connecting section 11132 close to the second sealing plate 113 is welded to the second sealing plate 113, and the edge of the fourth bent portion 1116 is welded to the second sealing plate 113, thereby realizing the fixed connection of the first sealing plate 112, the second sealing plate 113 and the plate member 111. Moreover, the fixed connection operation is simple and the connection reliability is good, which is beneficial to improving the structural reliability of the first box body 110. In addition, the first sealing plate 112, the second sealing plate 113 and the plate member 111 are connected by welding, which can also realize the sealed connection between the first sealing plate 112, the second sealing plate 113 and the plate member 111, and is beneficial to improving the sealing performance of the accommodation space 1101.

[0232] In this embodiment, the first box body 110 further includes three mounting beams 114. The mounting beams 114 extend in the first direction, and the three mounting beams 114 are arranged at intervals in the second direction. The multiple mounting beams 114 can be arranged at equal intervals or at unequal intervals.

[0233] In this embodiment, the first box body 110 further includes a first module beam 115 and a second module beam 116 for connecting with the battery cell 200 and connecting with the plate member 111. The first module beam 115 and the second module beam 116 are located in the accommodation space 1101. The first module beam 115 is located at one of the two opposite side portions of the plate body portion 1111 in the second direction, and the second module beam 116 is located at the other of the two opposite side portions of the plate body portion 1111 in the second direction. In the second direction, the first mounting beam 114 is disposed opposite to the first module beam 115, and the last mounting beam 114 is disposed opposite to the second module beam 116.

[0234] In this embodiment, the first sealing plate 112 and the second sealing plate 113 are perpendicular to the plate body portion 1111 and form a U-shaped structure. The second box body 120 also has a U-shaped structure. The second box body 120 is buckled on the first box body 110. The first sealing plate 112 and the second sealing plate 113 seal the openings on the opposite sides of the second box body 120. The edges of the first sealing plate 112 and the second sealing plate 113 are provided with connecting portions extending away from the accommodation space 1101. The connecting portions and the second box body 120 are fixedly connected through fasteners 140. The first strengthening section 11141 is provided with a first connecting hole 11146. After the bolt passes through the side portion of the second box body 120 and then passes through the first connecting hole 11146, it is screwed with a nut, so that the first box body 110 and the second box body 120 are fixedly connected. At the same time, under the connecting action of the fasteners 140, the sealing member 130 can also be stably clamped and fixed between the second connecting section 11132 and the inner wall surface of the second box body 120 to achieve a sealed connection.

[0235] Embodiment 2

[0236] The difference between this embodiment and Embodiment 1 is that: as shown in Figure 12 and Figure 13 The plate body portion 1111 further includes a connected first plate body sub-portion 11111 and a second plate body sub-portion 11112. The first plate body sub-portion 11111 and the second plate body sub-portion 11112 are stacked along the direction of the plate body portion 1111 facing the accommodation space 1101. A first space is formed by the first plate body sub-portion 11111 being recessed away from the second plate body sub-portion 11112, and a second space is formed by the second plate body sub-portion 11112 being recessed away from the second plate body sub-portion 11112. The first space and the second space together form a heat exchange channel 1102.

[0237] In another embodiment of the present application, a method for manufacturing a battery box is provided. The method for manufacturing a battery box is used to manufacture the battery box 100 as described in the above embodiment. The method for manufacturing a battery box includes the following steps: bending the edge of the plate member 111 toward the accommodation space 1101 to form a plate body portion 1111 and a first bending portion 1112.

[0238] In the method for manufacturing a battery box according to the embodiment of the present application, the edge of the plate member 111 is bent to obtain a bending portion and a plate body portion 1111. Compared with the box body formed by blow molding, the bending radius of the edge of the plate member 111 during bending is small, which can reduce the width dimension of the first box body 110, reduce the width dimension of the battery box 100, reduce the occupied space of the battery 1100 in the electrical device, and is beneficial to improving the structural compactness and service performance of the electrical device.

[0239] In another embodiment of the present application, the method for manufacturing a battery box specifically includes the following method: roll bending the edge of the plate member 111 to form a plate body and a first bending portion 1112.

[0240] By adopting the technical solution of this embodiment, the edge of the plate member 111 can be bent by means of rolling or by a bending machine. Its manufacturing method is simple. In addition, compared with the box body formed by blow molding, the bending radius of the edge of the plate member 111 in the roll bending forming is small, which can reduce the width dimension of the first box body 110, reduce the width dimension of the battery box 100, reduce the occupied space of the battery 1100 in the electrical device, and is beneficial to improving the structural compactness and service performance of the electrical device.

[0241] In another embodiment of the present application, the plate body portion 1111 further includes a first plate body sub-portion 11111 and a second plate body sub-portion 11112 that are connected to each other. The first plate body sub-portion 11111 and the second plate body sub-portion 11112 are stacked along the direction of the plate body portion 1111 facing the accommodation space 1101; at least one of the first plate body sub-portion 11111 and the second plate body sub-portion 11112 is recessed away from the other by blow molding to form a heat exchange channel 1102 for the flow of the heat exchange medium.

[0242] By adopting the technical solution of this embodiment, the recesses of the first plate body sub-portion 11111 and the second plate body sub-portion 11112 can be made into the heat exchange channel 1102 by means of blow molding or stamping, etc. Among them, compared with other methods, in the blow molding method, the thickness of the first plate body sub-portion 11111 and the second plate body sub-portion 11112 can be set smaller, so that the mass of the first box body 110 is smaller.

[0243] In another embodiment of the present application, a battery 1100 is provided, which includes the battery box 100 as described in the above embodiment and at least one battery cell 200. The battery cell 200 is accommodated in the accommodation space 1101. Alternatively, the battery 1100 includes a battery box 100 made by using the battery box manufacturing method as described in the above embodiment and at least one battery cell 200, and the battery cell 200 is accommodated in the accommodation space 1101.

[0244] The battery 1100 of the embodiment of the present application, by adopting the above battery box 100 or the battery box 100 made by using the above battery box manufacturing method, reduces the width dimension of the first box body 110 and the width dimension of the battery box 100, reduces the occupied space of the battery 1100 in the electrical device, and is beneficial to improving the structural compactness and service performance of the electrical device.

[0245] In another embodiment of the present application, an electrical device is provided, which includes the battery 1100 as described in the above embodiment.

[0246] The electrical device according to the embodiment of the present application uses the above-mentioned battery 1100, reducing the width dimension of the first box body 110 and the width dimension of the battery box 100, reducing the occupied space of the battery 1100 in the electrical device, which is beneficial to improving the structural compactness and performance of the electrical device.

[0247] The descriptions of the above embodiments tend to emphasize the differences between the embodiments. Their similarities or similarities can be referred to each other. For the sake of brevity, they will not be repeated herein.

[0248] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; 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 present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery box, characterized in that: The battery box comprises: The first box body comprises a plate, one side of which has a storage space for storing battery cells; the plate comprises a plate body and a first bending portion, the first bending portion is bent from an edge of the plate body toward the storage space.

2. The battery box according to claim 1, characterized in that: The first bending portion includes a bending arc segment and a first connecting segment, and the bending arc segment is connected between the first connecting segment and the plate body.

3. The battery box according to claim 2, characterized in that: The thickness of the first connecting segment is t, and the radius of the bent arc segment is R, wherein 0.8≤R / t≤2; preferably, 1≤R / t≤1.

5.

4. The battery box according to claim 2 or 3, characterized in that: The radius of the bending arc segment is R, wherein 0.5 mm ≤ R ≤ 4 mm; preferably, 1 mm ≤ R ≤ 2 mm.

5. The battery box according to any one of claims 2 to 4, characterized in that: The included angle between the first connecting section and the plate body is α, wherein 85°≤α≤95°; preferably, 89°≤α≤91°.

6. The battery box according to any one of claims 1 to 5, characterized in that: The plate further includes a second bending portion, which is bent from an end of the first bending portion away from the plate body toward the plate body, and is located at a side of the first bending portion facing away from the plate body.

7. The battery box according to claim 6, characterized in that: The second bending portion includes a bending semicircular segment and a second connecting segment, one end of the bending semicircular segment is connected to the end of the first bending portion away from the plate body, and the other end of the bending semicircular segment is connected to one end of the second connecting segment.

8. The battery box according to claim 7, characterized in that: The second connecting section is in contact with the first bending portion.

9. The battery box according to any one of claims 6 to 8, characterized in that: The plate also includes a reinforcing portion, one end of which is connected to an end of the second bending portion close to the plate body, and the other end of which is connected to a surface of the plate body facing away from the accommodating space.

10. The battery box according to claim 9, characterized in that: The reinforcement portion and the plate body portion are arranged to form a cavity.

11. The battery box according to claim 10, characterized in that: The reinforcement portion comprises a first reinforcement section, a second reinforcement section and a third reinforcement section connected in sequence, wherein one end of the first reinforcement section facing away from the second reinforcement section is connected to the end of the second bending section close to the plate body, and one end of the third reinforcement section facing away from the second reinforcement section is connected to the surface of the plate body facing away from the accommodation space; The second reinforcement section is spaced apart from a surface of the plate body facing away from the accommodation space, so that the first reinforcement section, the second reinforcement section, the third reinforcement section and the plate body are jointly arranged to form the cavity.

12. The battery box according to claim 11, characterized in that: The reinforcement portion further includes a fourth reinforcement segment, one end of which is connected to the end of the third reinforcement segment facing away from the second reinforcement segment, and the fourth reinforcement segment is in contact with a surface of the plate body facing away from the accommodating space.

13. The battery box according to any one of claims 9 to 12, characterized in that: The battery box further includes a second box body, the second box body is sealed and connected to the second bending portion, and the first box body and the second box body are surrounded to form the accommodating space.

14. The battery box according to claim 13, characterized in that: The second bending portion is located in the second box body, and a sealing member is provided between a surface of the second bending portion facing away from the plate body and an inner wall surface of the second box body.

15. The battery box according to claim 14, characterized in that: The battery box also includes a fastener, the reinforcement portion is configured with a first connecting hole for cavity communication, the fastener is passed through the first connecting hole and connected to the second box body, so that the seal is clamped and fixed between the surface of the second bent portion facing away from the plate body and the inner wall surface of the second box body.

16. The battery box according to any one of claims 10 to 15, characterized in that: The reinforcement portion is provided with a mounting structure for fixing the battery box.

17. The battery box according to claim 16, characterized in that: The mounting structure includes a second connecting hole, and the second connecting hole is connected to the cavity.

18. The battery box according to any one of claims 9 to 17, characterized in that: In the direction from the first bending portion to the second bending portion, the size of the plate body is L1, and the size of the reinforcement portion is L2, wherein 0.05≤L2 / L1≤0.25, preferably, 0.1≤L2 / L1≤0.

2.

19. The battery box according to any one of claims 1 to 18, characterized in that: The first bending portions are disposed on two sides of the plate body that are opposite to each other and distributed along the first direction.

20. The battery box according to claim 19, characterized in that: The plate also includes a third bending portion and a fourth bending portion, the third bending portion is bent from one of the two sides of the plate body relatively distributed along the second direction toward the accommodating space, and the fourth bending portion is bent from the other of the two sides of the plate body relatively distributed along the second direction toward the accommodating space, and the first direction and the second direction intersect.

21. The battery box according to claim 20, characterized in that: The first box body also includes a first sealing plate and a second sealing plate for connecting to the plate, the first sealing plate is inserted between one end of the first bending portion and the third bending portion, the second sealing plate is inserted between the other end of the first bending portion and the fourth bending portion, and the first sealing plate, the second sealing plate and the plate surround the accommodating space.

22. The battery box according to claim 21, characterized in that: The battery box also includes a second box body, and the opposite side portions of the second box body along the first direction are respectively connected to the two first bending portions, one of the opposite side portions of the second box body along the second direction is connected to the first sealing plate, and the other of the opposite side portions of the second box body along the second direction is connected to the second sealing plate.

23. The battery box according to any one of claims 19 to 22, characterized in that: The first box body further includes a plurality of mounting beams for connecting with the plate body, the plurality of mounting beams are arranged at intervals along a second direction, and the first direction intersects with the second direction.

24. The battery box according to claim 23, characterized in that: The plurality of mounting beams are located at a side of the plate body facing away from the accommodating space.

25. The battery box according to claim 24, characterized in that: The first box body also includes a first module beam and a second module beam for connecting to the battery cell and to the plate, the first module beam and the second module beam are located in the accommodating space, the first module beam is located at one of the two sides of the plate body that are relatively distributed along the second direction, and the second module beam is located at the other of the two sides of the plate body that are relatively distributed along the second direction.

26. The battery box according to claim 25, characterized in that: In the second direction, the first mounting beam is arranged opposite to the first module beam, and / or the last mounting beam is arranged opposite to the second module beam.

27. The battery box according to any one of claims 1 to 26, characterized in that: The plate body is provided with a heat exchange channel for allowing the heat exchange medium to flow.

28. The battery box according to claim 27, characterized in that: The plate body also includes a first plate body sub-part and a second plate body sub-part connected to each other, wherein the first plate body sub-part and the second plate body sub-part are stacked along a direction of the plate body toward the accommodation space; At least one of the first plate body sub-portion and the second plate body sub-portion is recessed away from the other to form the heat exchange channel.

29. A method for manufacturing a battery box, characterized in that: The battery box manufacturing method is used to manufacture the battery box according to any one of claims 1 to 28; the battery box manufacturing method comprises the following steps: bending the edge of the plate toward the accommodating space to form the plate body and the first bent portion.

30. The method for manufacturing a battery box according to claim 29, characterized in that: The battery box manufacturing method specifically includes the following method: rolling and bending the edge of the plate to form the plate body and the first bent portion.

31. The method for manufacturing a battery box according to claim 29 or 30, characterized in that: The plate body portion also includes a first plate body sub-portion and a second plate body sub-portion connected to each other, and the first plate body sub-portion and the second plate body sub-portion are stacked along the direction of the plate body toward the accommodating space; at least one of the first plate body sub-portion and the second plate body sub-portion is recessed toward the other through blow molding to form a heat exchange channel for the flow of heat exchange medium.

32. A battery, characterized in that: The battery comprises a battery box as described in any one of claims 1 to 28 and at least one battery cell, and the battery cell is accommodated in the accommodation space; or, the battery comprises a battery box manufactured by the battery box manufacturing method as described in any one of claims 29 to 31 and at least one battery cell, and the battery cell is accommodated in the accommodation space.

33. An electrical device, characterized in that: Comprising the battery of claim 29.

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