Battery box body, battery and battery string

Abstract

The utility model relates to a battery box body, battery and battery string, the battery box body is rectangular and comprises a first shell, a second shell and an adapter, the first shell is provided with an accommodating cavity with an opening at one end, the periphery of the opening end of the accommodating cavity is provided with a flange structure, and the flange structure comprises a second bending surface; the second bending surface extends in the direction opposite to the cavity bottom of the accommodating cavity; the second shell covers the opening end of the first shell and accommodates the second bent surface therein; wherein the first connecting surface is fixedly connected with the inner side of the second bending surface, and the second connecting surface is fixedly connected with the inner side of the upper cover body. By adopting the scheme, the adapter is arranged, so that the first shell and the second shell are not connected, the size of the flange structure extending towards the interior of the battery box is reduced, the range of the interior of the battery box shielded by the flange structure is reduced, related components can be conveniently placed in the battery box, and the operable space is increased; the effects of reducing the space waste in the battery box and reducing the volume of the battery box are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery box, a battery and a battery string. Background Art

[0002] Currently, household energy storage battery boxes are designed to have a flat and smooth front panel for aesthetic reasons, while also being removable through a rear cover. Consequently, the battery box includes a removable main housing and a rear cover. To ensure a protection rating of IP65 or higher, the open end of the main housing is designed with a wide, circumferential, outward-facing flange. The flange's outer surface is parallel to the rear cover and is used to squeeze the sealing foam and secure the rear cover with bolts. Consequently, the flange's outer surface must be wide enough to accommodate both squeezing the sealing foam and securing the bolts. Consequently, the flange's outer surface is relatively wide. Since the battery box is required to be a rectangular structure with a substantially flat and uniform outer perimeter, the flange's outer surface must extend toward the interior of the box. Consequently, a large portion of the internal space of the battery box is obscured by the curved surface formed by the circumferential outward-facing flange, limiting the space available for production processes and tool operation. In order to accommodate fixed electrical components and battery packs, the battery box must be larger, resulting in wasted internal space and reduced volumetric energy density. Furthermore, a larger box volume increases weight and occupies a significant amount of storage space for end users. Utility Model Content

[0003] Based on this, a battery box, a battery and a battery string are provided to solve the problem in the prior art that the width of the outer side of the flange is too large due to the need to fix the second shell, so that the outer side of the flange extends too much into the battery box, resulting in an increase in the volume of the battery box.

[0004] In one aspect, the present invention provides a battery box, which is rectangular and includes:

[0005] The first housing has a receiving cavity with an open end. A flange structure is provided around the open end of the receiving cavity. The flange structure includes a second bent surface. The second bent surface extends in a direction away from the bottom of the receiving cavity.

[0006] a second shell, the second shell covering the open end of the first shell and accommodating the second bent surface therein;

[0007] The adapter has a first connecting surface and a second connecting surface connected to each other, wherein the first connecting surface is fixedly connected to the inner side of the second bending surface, and the second connecting surface is fixedly connected to the inner side of the second shell.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] In one implementation, the adapter includes:

[0010] There are multiple recessed portions, which are spaced apart along the length of the adapter, and the recessed portions are opened on the second connecting surface;

[0011] The second shell is provided with a contoured structure that fits the recessed portion.

[0012] In one implementation, the adapter further includes:

[0013] A first connecting hole, used for connecting to the second shell, the first connecting hole being opened on the recessed portion;

[0014] A first sealing groove, which is an annular concave structure and is opened around the first connecting hole;

[0015] The first sealing ring is located in the first sealing groove.

[0016] In one implementation, the adapter further includes:

[0017] A second connecting hole is used to connect to the first shell, and the second connecting hole is opened on the first connecting surface;

[0018] A second sealing groove is an annular concave structure and is formed around the second connecting hole;

[0019] The second sealing ring is located in the second sealing groove.

[0020] In one implementation, two adapters are provided and arranged in parallel along the length direction of the battery box, and the first connecting surface and the second connecting surface are arranged perpendicular to each other;

[0021] The adapter also includes:

[0022] The fixing holes are used to fix the adapter in the battery box. The fixing holes are opened on the surface opposite to the second connecting surface. There are at least two fixing holes and they are evenly distributed at both ends of the adapter in the length direction.

[0023] In one implementation, the flange structure further includes:

[0024] an outer side surface of the flange, which is connected to the second bent surface and has a rectangular ring structure, and the outer side surface of the flange extends away from the adapter and is parallel to the second shell;

[0025] The battery box also includes:

[0026] The sealing member is located between the outer side surface of the flange and the second shell, and the sealing member is annular.

[0027] In one implementation manner, the side of the sealing member facing the second shell is a flat surface, and the side of the sealing member facing the outer side surface of the flange is an arc surface.

[0028] In one implementation, the flange structure is a continuously bent structure that protrudes along the edge of the first shell toward the middle of the first shell, and the second shell is a rectangular cavity structure with one end open and surrounds the flange structure.

[0029] In a second aspect, the utility model further provides a battery, including a battery box, and the battery further includes: a battery cell arranged in the battery box.

[0030] In a third aspect, the present invention further provides a battery string comprising a plurality of batteries.

[0031] The beneficial effects of the present invention are as follows: by setting an adapter, the first connecting surface of the adapter is fixed to the first shell, and the second connecting surface of the adapter is fixed to the second shell, so that the first shell and the second shell do not need to be directly connected, so as to reduce the size of the flange structure on the first shell extending toward the inside of the battery box, thereby reducing the range of the battery box that is blocked by the flange structure, thereby facilitating the placement of battery packs or fixing electrical components in the battery box, increasing the operable space, and reducing the space waste in the battery box, thereby achieving the effect of reducing the volume of the battery box, and also achieving the effect of reducing the weight of the battery box body and reducing the space occupied by the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is an exploded view of the battery;

[0033] Figure 2 It is the end view of the battery in the length direction;

[0034] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0035] Figure 4 A schematic structural diagram of an adapter in one embodiment;

[0036] Figure 5 for Figure 4 Schematic diagram of the structure of the adapter in another direction;

[0037] Figure 6 An exploded view of an adapter in one embodiment;

[0038] Figure 7 is a schematic plan view of an adapter in one embodiment;

[0039] Figure 8 for Figure 7 Cross-sectional view at AA in the middle.

[0040] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0041] 100, adapter; 101, first connecting surface; 102, second connecting surface; 103, recessed portion; 104, first connecting hole; 105, first sealing groove; 106, first sealing ring; 107, second connecting hole; 108, second sealing groove; 109, second sealing ring; 110, fixing hole;

[0042] 200, second shell;

[0043] 300, first shell; 301, second bending surface; 302, outer side of flange;

[0044] 400, seals

[0045] 500, battery cells. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to 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 intended to limit this application.

[0047] An embodiment of the present invention provides a battery box, see Figures 1 to 3 The battery case is rectangular and includes: a first shell 300, a second shell 200 and an adapter 100. The first shell 300 has a receiving cavity with an open end. A flange structure is provided around the open end of the receiving cavity. The flange structure includes a second bent surface 301. The second bent surface 301 extends in a direction away from the bottom of the receiving cavity.

[0048] The second housing 200 covers the open end of the first housing 300 and accommodates the second bent surface 301 therein;

[0049] The adapter 100 has a first connecting surface 101 and a second connecting surface 102 connected to each other, wherein the first connecting surface 101 is fixedly connected to the inner side of the second bending surface 301 , and the second connecting surface 102 is fixedly connected to the inner side of the second shell 200 .

[0050] The beneficial effect of this embodiment is: by setting the adapter 100, the first connecting surface 101 of the adapter 100 is fixed to the first shell 300, and the second connecting surface 102 of the adapter 100 is fixed to the second shell 200, so that the first shell 300 and the second shell 200 do not need to be directly connected, so as to reduce the size of the flange structure on the first shell 300 extending toward the inside of the battery box, thereby reducing the range of the battery box that is blocked by the flange structure, thereby facilitating the placement of battery packs or fixing electrical components in the battery box, increasing the operable space, and reducing the space waste in the battery box, thereby achieving the effect of reducing the volume of the battery box, and also achieving the effect of reducing the weight of the battery box body and reducing the space occupied by the battery box.

[0051] Specifically, the flange structure can be understood as a flange structure that has the need to be connected to other parts using connectors such as bolts, and also needs to be sealed, so it is called a flange structure.

[0052] In the embodiment, see Figures 1 to 3 Two, three or four adapters 100 can be provided. Since the second bending surface 301 can be provided on all four sides of the first shell 300, two adapters 100 can be respectively connected to any two oppositely arranged second bending surfaces 301 of the first shell 300, or three adapters 100 can be respectively connected to any three second bending surfaces 301 of the first shell 300, or four adapters 100 are respectively connected to all four sides of the first shell 300. Since there are three or four adapters 100, for a rectangular battery box, there must be two adapters 100 connected to two oppositely arranged second bending surfaces 301, so no specific restriction is made here. During specific use, two parallel adapters 100 can be used to fix the second shell 200 and the first shell 300. In this form, the flange structure only has two opposite sides that require reserved positions for placing bolts and nuts, so the obstruction of the interior of the battery box is minimized; it can be inferred that the more adapters 100 are used, the larger the area of ​​the battery box blocked by the flange structure, but the connection stability of the second shell 200 and the first shell 300 will be enhanced. Therefore, whether to use three adapters 100 or four adapters 100 is determined according to specific needs.

[0053] In this embodiment, see Figure 1 When two adapters 100 are used and arranged along the length direction of the battery box, the stability of the connection between the second shell 200 and the first shell 300 is ensured while the flange structure does not block too large an area inside the battery box.

[0054] In some embodiments, see Figure 4 The adapter 100 includes a plurality of recessed portions 103, which are spaced apart along the length of the adapter 100. The recessed portions 103 are formed on the second connecting surface 102. The second housing 200 is provided with a contoured structure that mates with the recessed portions 103. The recessed portions 103 on the second connecting surface 102 facilitate a concave-convex engagement between the second housing 200 and the adapter 100, ensuring a tighter fit and improving stability after the connection.

[0055] In some embodiments, see Figure 6The adapter 100 further includes a first connection hole 104, a first sealing groove 105, and a first sealing ring 106. The first connection hole 104 is used to connect to the second housing 200 and is provided in the recessed portion 103. The first sealing groove 105 is an annular, concave structure and surrounds the first connection hole 104. The first sealing ring 106 is located within the first sealing groove 105. Thus, the first connection hole 104 is used to connect the second housing 200 and the adapter 100. During connection, the protruding contour of the second housing 200 compresses the first sealing ring 106 to form a partial seal. Since the first sealing ring 106 is provided around the first connection hole 104 and the second housing 200 and the adapter 100 are connected via bolts, the first sealing ring 106 prevents air leakage at the first connection hole 104, thereby improving the sealing performance of the bolted connection.

[0056] In the embodiment, see Figure 7 and Figure 8 The first sealing groove 105 is coaxially arranged with the first connecting hole 104; the first sealing ring 106 protrudes from the first sealing groove 105 to ensure that the first sealing ring 106 is squeezed when the second shell 200 and the adapter 100 are connected, thereby improving the sealing performance of the connection between the second shell 200 and the adapter 100.

[0057] In some embodiments, see Figure 4 and Figure 6 The adapter 100 further includes: a second connection hole 107, a second sealing groove 108, and a second sealing ring 109. The second connection hole 107 is used to connect to the first housing 300. The second connection hole 107 is provided on the first connection surface 101. The second sealing groove 108 is an annular, concave structure and surrounds the second connection hole 107. The second sealing ring 109 is located within the second sealing groove 108. Thus, the second connection hole 107 is used to connect the first housing 300 and the adapter 100. During connection, the second bent surface 301 can be connected to the adapter 100 via bolts. When the bolts extend into the second connection hole 107 and tighten the second connection hole 107 and the adapter 100, they squeeze the second sealing ring 109, thereby preventing air leakage at the second connection hole 107 and improving the sealing performance of the bolted connection.

[0058] In the embodiment, the second sealing groove 108 is coaxially arranged with the second connecting hole 107; the second sealing ring 109 protrudes from the second sealing groove 108 to ensure that the second sealing ring 109 is squeezed when the second bending surface 301 and the adapter 100 are connected, thereby improving the sealing of the connection between the second bending surface 301 and the adapter 100.

[0059] In some embodiments, see Figure 5The adapter 100 has two parallel connecting surfaces 101 and 102 arranged along the length of the battery case. The first connecting surface 101 and the second connecting surface 102 are perpendicular to each other. The adapter 100 also includes fixing holes 110, which are used to fix the adapter 100 in the battery case. The fixing holes 110 are located on the surface opposite the second connecting surface 102. There are at least two fixing holes 110, which are evenly distributed at both ends of the adapter 100 in the length direction. In this way, the fixing holes 110 provide support for the lower portion of the adapter 100, improving the stability of the adapter 100 connected to the battery case.

[0060] In some embodiments, see Figures 2 to 3 The flange structure further includes a flange outer surface 302, which is connected to the second bent surface 301 and has a rectangular ring structure. The flange outer surface 302 extends away from the adapter 100 and is parallel to the second shell 200. The battery case further includes a sealing member 400, which is located between the flange outer surface 302 and the second shell 200 and has a ring shape. In this way, the sealing member 400 seals the gap between the flange outer surface 302 and the second shell 200, thereby improving the sealing of the connection between the flange outer surface 302 and the second shell 200, thereby preventing the flange outer surface 302 and the second shell 200 from being sealed, thereby improving the sealing of the entire battery case interior.

[0061] Specifically, the seal 400 has a rectangular ring structure, and the structure of the seal 400 corresponds to the overall structure of the battery box. The annular seal 400 corresponds to the annular flange structure, wherein the outer side surface 302 of the flange also has a continuous annular structure and is arranged parallel to the second shell 200, that is, the outer side surface 302 of the flange has a rectangular ring structure; therefore, by arranging the annular seal 400 between the outer side surface 302 of the annular flange and the second shell 200, the contact surface between the second shell 200 and the flange structure is sealed, that is, a seal is formed between the first shell 300 and the second shell 200, thereby ensuring the sealing inside the battery box.

[0062] Specifically, the sealing member 400 is a sealing foam, which facilitates the deformation of the sealing member 400 and provides a good sealing effect.

[0063] In some embodiments, see Figure 3The side of the seal 400 facing the second housing 200 is a flat surface, while the side of the seal 400 facing the flange outer side 302 is a curved surface. Thus, the side of the seal 400 facing the second housing 200 is a flat surface. This structural arrangement of the seal 400 facilitates the pre-attachment of one side of the seal 400 to the second housing 200, allowing for pre-positioning of the seal 400 and the second housing 200. This facilitates the determination of the extrusion sealing position of the seal 400 during installation and reduces displacement of the seal 400 during attachment. The side of the seal 400 facing the flange outer side 302 is a curved surface, facilitating extrusion deformation of the seal 400, thereby achieving a circumferential seal between the second housing 200 and the flange outer side 302 through extrusion of the seal 400.

[0064] In some embodiments, see Figure 3 The flange structure is a continuous bending structure, and the flange structure protrudes along the edge of the first shell 300 toward the middle of the first shell 300. The second shell 200 is a rectangular cavity structure with one end open and surrounds the circumference of the flange structure. In this way, the flange structure is a continuous bending structure, and is bent toward the middle of the battery box for the first time, then bent toward the second shell 200 for the second time to form a second bending surface 301, and then bent back toward the middle of the battery box for the third time to form a flange outer side 302. The second bending surface 301 is perpendicular to the second shell 200, and the flange outer side 302 is parallel to the second shell 200. As for the flange structure as a whole, the flange structure as a whole does not exceed the outer contour of the first shell 300. Therefore, the cavity structure formed by the second shell 200 surrounds the outer circumference of the flange structure, that is, while protecting the outer circumference of the flange structure, it also makes the outer contour structure of the battery box more neat. Among them, it is preferred that the circumferential cavity formed by the second shell 200 surrounding the flange structure and the circumferential cavity of the first shell 300 form four corresponding coplanar structures.

[0065] Specifically, the second shell 200 and the first shell 300 form a structure with regular side walls.

[0066] A battery, see Figures 1 to 2 , including a battery box, and the battery also includes a battery cell 500 arranged in the battery box.

[0067] A battery string includes a plurality of batteries.

[0068] When installing the battery box, refer to Figure 3 、 Figure 7 and Figure 8 Since the first connection surface 101 of the adapter 100 is fixed to the first shell 300, the second connection surface 102 of the adapter 100 is fixed to the second shell 200, and the outer surface 302 of the flange is attached to the second shell 200 through the sealing member 400, three sealing structures are formed, namely:

[0069] The connection between the first connection surface 101 and the first housing 300 is sealed by the second sealing ring 109. That is, when the first connection surface 101 and the second bent surface 301 are connected, the second sealing ring 109 is squeezed between the first connection surface 101 and the second bent surface 301 so that the bolted connection between the two is sealed by the second sealing ring 109 to prevent air leakage at the connection between the two.

[0070] The connection between the second connection surface 102 and the second housing 200 is sealed by the first sealing ring 106. That is, when the second connection surface 102 and the second housing 200 are connected, the first sealing ring 106 is squeezed between the second connection surface 102 and the second housing 200, so that the bolt connection position between the two is sealed by the first sealing ring 106 to prevent air leakage at the connection between the two.

[0071] The abutting surface between the second shell 200 and the first shell 300 is sealed by the sealing member 400. Since the sealing member 400 is provided between the second shell 200 and the first shell 300, when the positions of the second shell 200, the adapter 100 and the first shell 300 are fixed, the second shell 200 and the first shell 300 are pressed together, that is, the second shell 200 and the outer surface 302 of the flange are pressed together, so that the sealing member 400 located between the two is squeezed and forms a seal, thereby avoiding air leakage at the abutting surface between the second shell 200 and the first shell 300.

[0072] Therefore, since the present application adopts three sealing structures, the sealing of the battery box is effectively improved, that is, the protection level of the battery box is improved. On this basis, it also plays a role in reducing the volume of the battery box and improving space utilization.

[0073] For details, see Figure 1 When connecting the second connecting surface 102 and the second shell 200, a corresponding long countersunk hole structure can be opened on the second shell 200 to prevent the connecting bolts from protruding from the surface of the second shell 200 while facilitating the movement and adjustment of the connecting bolts, thereby facilitating a stable connection between the second shell 200 and the second connecting surface 102.

[0074] See also Figure 3 When connecting the first connecting surface 101 and the first shell 300, since the flange structure inherently has three bent surfaces, the nut for fixing the bolts between the first connecting surface 101 and the first shell 300 is located between the second bent surface 301 and the side wall of the cavity of the second shell 200, thereby preventing the nut from protruding from the outer wall of the battery box, ensuring the regularity of the outer wall, and facilitating the close arrangement and stacking of the battery boxes.

[0075] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0076] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention can be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed in the present invention.

[0077] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0079] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0080] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0082] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A battery box, characterized in that: The battery box is rectangular and includes: A first shell (300), the first shell (300) having a receiving cavity with an open end, a flange structure provided around the open end of the receiving cavity, the flange structure including a second bent surface (301), the second bent surface (301) extending in a direction away from the bottom of the receiving cavity; a second shell (200), the second shell (200) covering the open end of the first shell (300) and accommodating the second bent surface (301) therein; An adapter (100) having a first connecting surface (101) and a second connecting surface (102) connected to each other, wherein the first connecting surface (101) is fixedly connected to the inner side of the second bending surface (301), and the second connecting surface (102) is fixedly connected to the inner side of the second shell (200).

2. The battery box according to claim 1, characterized in that: The adapter (100) comprises: A plurality of recessed portions (103) are provided and are spaced apart along the length direction of the adapter (100), and the recessed portions (103) are opened on the second connecting surface (102); Wherein, the second shell (200) is provided with a contoured structure that fits the recessed portion (103).

3. The battery box according to claim 2, characterized in that: The adapter (100) further includes: a first connecting hole (104) for connecting to the second shell (200), wherein the first connecting hole (104) is provided on the recessed portion (103); a first sealing groove (105) which is an annular concave structure and is formed around the first connecting hole (104); A first sealing ring (106) is located in the first sealing groove (105).

4. The battery box according to claim 1, characterized in that: The adapter (100) further includes: a second connecting hole (107) for connecting to the first housing (300), wherein the second connecting hole (107) is provided on the first connecting surface (101); a second sealing groove (108) which is an annular concave structure and is formed around the second connecting hole (107); A second sealing ring (109) is located in the second sealing groove (108).

5. The battery box according to claim 1, characterized in that: The adapters (100) are provided with two and are arranged in parallel along the length direction of the battery box, and the first connecting surface (101) and the second connecting surface (102) are arranged perpendicular to each other; The adapter (100) further includes: A fixing hole (110) is used to fix the adapter (100) in the battery box, and the fixing hole (110) is opened on the surface opposite to the second connecting surface (102); there are at least two fixing holes (110) and they are evenly distributed at both ends of the adapter (100) in the length direction.

6. The battery box according to claim 1, characterized in that: The flange structure further includes: a flange outer surface (302), which is connected to the second bent surface (301) and presents a rectangular ring structure, wherein the flange outer surface (302) extends in a direction away from the adapter (100) and is parallel to the second shell (200); The battery box further includes: A sealing member (400) is located between the outer side surface of the flange (302) and the second shell (200), and the sealing member (400) is annular.

7. The battery box according to claim 6, characterized in that: The side of the sealing member (400) facing the second shell (200) is a flat surface, and the side of the sealing member (400) facing the outer side surface (302) of the flange is an arc surface.

8. The battery box according to claim 6, characterized in that: The flange structure is a continuously bent structure, and the flange structure protrudes along the edge of the first shell (300) toward the middle of the first shell (300). The second shell (200) is a rectangular cavity structure with one end open and surrounds the circumference of the flange structure.

9. A battery, characterized in that: The battery comprises a battery box as claimed in any one of claims 1 to 8, and the battery further comprises: a battery cell (500) arranged in the battery box.

10. A battery string, characterized in that: Comprising a plurality of batteries as claimed in claim 9.

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