Battery box, battery and energy storage equipment

Abstract

The utility model relates to the technical field of batteries, and provides a battery box, a battery and energy storage equipment, the battery box comprises a bottom plate, a side plate and a top plate, the side plate is fixed between the bottom plate and the top plate to form a mounting cavity for mounting a battery monomer, and the bottom plate and the top plate are arranged along a first direction; the side plates are provided with adjusting structures used for adjusting the distance between the bottom plate and the top plate in the first direction. According to the battery box, the adjusting structures are arranged on the side plates, and the distance between the bottom plate and the top plate in the first direction is adjusted by utilizing the adjusting structures, so that the battery box is suitable for the battery monomers with different heights, and the problem that the existing battery box cannot be compatible with the battery monomers with various sizes is solved.

Description

Technical Field

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

[0002] A battery generally includes a battery box and a battery cell disposed in the battery box, wherein the battery box is usually manufactured according to the size of the battery cell. Since the sizes of battery cells of different types or specifications are different, it is necessary to design multiple types of battery boxes, resulting in increased production costs. Utility Model Content

[0003] In view of this, embodiments of the present application provide a battery box, a battery, and an energy storage device to solve the problem that the existing battery box is not compatible with battery cells of various sizes.

[0004] An embodiment of the first aspect of the present application proposes a battery box, comprising a bottom plate, a side plate and a top plate, wherein the side plate is connected between the bottom plate and the top plate to form an installation cavity for installing a battery cell, and the bottom plate and the top plate are arranged along a first direction; and an adjustment structure is provided on the side plate for adjusting the distance between the bottom plate and the top plate in the first direction.

[0005] In the battery box provided in the embodiment of the present application, an adjustment structure is provided on the side panel so that the spacing between the bottom plate and the top plate in the first direction can be adjusted using the adjustment structure, thereby making the battery box suitable for battery cells of different heights, thereby solving the problem that the existing battery box is not compatible with battery cells of various sizes.

[0006] In some embodiments, the side panel includes a first panel segment connected to the bottom panel and a second panel segment connected to the top panel, and the adjustment structure connects the first panel segment and the second panel segment.

[0007] In some embodiments, the adjustment structure includes a first fixing hole provided on the first plate segment, a second fixing hole provided on the second plate segment, and a fastener passing through the first fixing hole and the second fixing hole to connect the first plate segment and the second plate segment; a plurality of the first fixing holes and / or the second fixing holes are arranged at intervals along the first direction.

[0008] In some embodiments, one of the first fixing hole and the second fixing hole is a threaded hole, the other of the first fixing hole and the second fixing hole is a plain hole, and the fastener is a threaded fastener.

[0009] In some embodiments, there is one first fixing hole, and there are multiple second fixing holes; along the first direction, the distance between the first fixing hole and the free end of the first plate segment is greater than the distance between the two second fixing holes at both ends; or,

[0010] There are multiple first fixing holes, and only one second fixing hole; along the first direction, the distance between the second fixing hole and the free end of the second plate segment is greater than the distance between the two first fixing holes at the two ends.

[0011] In some embodiments, the first plate segment is integrally formed with the bottom plate; and / or the second plate segment is integrally formed with the top plate.

[0012] In some embodiments, the battery box also includes a reinforcing plate, which forms an annular slot with the first plate segment, and the second plate segment is inserted into the annular slot; and / or, the reinforcing plate and the second plate segment form an annular slot, and the first plate segment is inserted into the annular slot.

[0013] In some embodiments, a sealant is provided in the annular slot.

[0014] A second aspect of the present application provides a battery, which includes the battery box as described in the first aspect, and a battery cell arranged in an installation cavity of the battery box.

[0015] The battery adopts all the embodiments of the above-mentioned battery box, and thus has at least all the beneficial effects of the above-mentioned embodiments, which will not be described one by one here.

[0016] A third aspect of the present application provides an energy storage device, which includes the battery as described in the second aspect.

[0017] The energy storage device adopts all the embodiments of the above-mentioned battery, and thus has at least all the beneficial effects of the above-mentioned embodiments, which will not be described one by one here.

[0018] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 is a schematic diagram of the structure of a battery box provided in some embodiments of the present application;

[0021] Figure 2 yes Figure 1 An exploded view of the battery box shown;

[0022] Figure 3 yes Figure 1 A sectional view of the battery box taken along the AA axis;

[0023] Figure 4 yes Figure 3 The enlarged view of point B in the middle;

[0024] Figure 5 yes Figure 2 A schematic diagram of the structure of the midsole plate, the first plate section and the reinforcement plate;

[0025] Figure 6 yes Figure 5 Enlarged view of point C in the middle;

[0026] Figure 7 yes Figure 2 Structural schematic diagram of the middle top plate and the second plate section;

[0027] Figure 8 yes Figure 7 Enlarged view of point D in the middle.

[0028] The meanings of the marks in the figure are:

[0029] 10. Battery box;

[0030] 11. Bottom plate;

[0031] 12, side panel; 121, first panel section; 122, second panel section;

[0032] 13. Top plate;

[0033] 14. Adjustment structure; 141. First fixing hole; 142. Second fixing hole; 143. Fastener;

[0034] 15. Installation cavity;

[0035] 16. Reinforcement plate; 161. Avoidance hole;

[0036] 17. Ring slot. DETAILED DESCRIPTION

[0037] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0039] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

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

[0041] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0042] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0043] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0044] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection 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 the specific circumstances.

[0045] At present, due to the different sizes of battery cells produced by different manufacturers, the existing battery boxes are not compatible with battery cells of various sizes. Therefore, it is necessary to design multiple types of battery boxes, which increases the production cost.

[0046] In order to solve the problem that the existing battery box is not compatible with battery cells of various sizes, the present application proposes a battery box, a battery and an energy storage device.

[0047] The first embodiment of the present application provides a battery box. Figures 1 to 3 The battery box 10 includes a bottom plate 11, a side plate 12 and a top plate 13. The side plate 12 is fixed between the bottom plate 11 and the top plate 13 to form a mounting cavity 15 for mounting a battery cell. The bottom plate 11 and the top plate 13 are arranged along a first direction. An adjusting structure 14 is provided on the side plate 12 for adjusting the distance between the bottom plate 11 and the top plate 13 in the first direction.

[0048] The first direction is Figure 2 The direction indicated by the arrow is the depth direction of the battery box 10.

[0049] The bottom plate 11 can support the battery cells in the installation cavity 15, the top plate 13 can protect the top of the battery cells in the installation cavity 15, and the side plate 12 can protect the side of the battery cells in the installation cavity 15. Any one or any several of the bottom plate 11, the side plate 12, and the top plate 13 can be a flat plate structure or a concave-convex structure; when the concave-convex structure is designed, the structural strength can be increased by reasonably designing the shape and size of the concave unit and the convex unit in the concave-convex structure, so that the battery cells can be supported more stably, and the battery box 10 is not easily deformed when squeezed by external force, thereby reducing or avoiding the deformation of the battery cells.

[0050] The number of the side panels 12 is determined according to the overall shape of the battery box 10. For example, if the overall shape of the battery box 10 is a quadrilateral, a pentagon, a hexagon, etc., the number of the side panels 12 can be four, five, six or more. It can be understood that the above quadrilateral, pentagon, and hexagon are all shapes presented from the perspective of the height direction of the battery box 10.

[0051] The side plate 12 is connected between the bottom plate 11 and the top plate 13 , that is, the upper portion of the side plate 12 is connected to the top plate 13 , and the lower portion of the side plate 12 is connected to the bottom plate 11 .

[0052] In the battery box 10 provided in the embodiment of the present application, an adjustment structure 14 is provided on the side panel 12 so that the adjustment structure 14 can be used to adjust the spacing between the bottom plate 11 and the top plate 13 in the first direction, thereby making the battery box 10 suitable for battery cells of different heights, thereby solving the problem that the existing battery box 10 is not compatible with battery cells of various sizes.

[0053] In addition, there is no need to design multiple models of battery boxes 10, which reduces the production cost of the product.

[0054] Please also refer to Figure 1 and Figure 2 In some embodiments, the side plate 12 includes a first plate segment 121 connected to the bottom plate 11 and a second plate segment 122 connected to the top plate 13 , and the adjustment structure 14 connects the first plate segment 121 and the second plate segment 122 .

[0055] The lower part of the first plate segment 121 is connected to the bottom plate 11 , and the upper part of the second plate segment 122 is connected to the top plate 13 .

[0056] In the first direction, the first plate segment 121 and the second plate segment 122 are larger in size than the bottom plate 11 and the top plate 13 . By arranging the adjustment structure 14 between the first plate segment 121 and the second plate segment 122 , a larger design space and assembly space are provided, which is conducive to the arrangement of the adjustment structure 14 .

[0057] In other embodiments, the side panel 12 includes at least one panel segment in addition to the first panel segment 121 and the second panel segment 122, for example, includes a third panel segment. In this case, the third panel segment can be disposed on the bottom panel 11, and the first panel segment 121 can be connected to the third panel segment. Alternatively, the third panel segment can be disposed on the top panel 13, and the second panel segment 122 can be connected to the third panel segment.

[0058] Please also refer to Figure 4 , Figure 5 and Figure 7 , as an implementation of the adjustment structure 14: the adjustment structure 14 includes a first fixing hole 141, a second fixing hole 142 and a fastener 143, the first fixing hole 141 is provided on the first plate segment 121, the second fixing hole 142 is provided on the second plate segment 122, the fastener 143 passes through the first fixing hole 141 and the second fixing hole 142 to fix the first plate segment 121 and the second plate segment 122; a plurality of first fixing holes 141 and / or second fixing holes 142 are arranged at intervals along the first direction.

[0059] In some embodiments, one first fixing hole 141 is provided along the first direction, and multiple second fixing holes 142 are arranged at intervals along the first direction. For example, three second fixing holes 142 are provided along the first direction; the first fixing hole 141 is aligned with different second fixing holes 142 along the first direction to adjust the spacing between the bottom plate 11 and the top plate 13 in the first direction, thereby changing the height of the installation cavity 15, so that the battery box 10 is suitable for battery cells of different heights.

[0060] In some other embodiments, a plurality of first fixing holes 141 may be arranged at intervals along the first direction, and a single second fixing hole 142 may be provided along the first direction. The second fixing hole 142 may be aligned with different first fixing holes 141 along the first direction to adjust the spacing between the bottom plate 11 and the top plate 13 along the first direction, thereby changing the height of the mounting cavity 15, so that the battery box 10 is suitable for battery cells of different heights.

[0061] In some other embodiments, a plurality of first fixing holes 141 and second fixing holes 142 may be arranged at intervals along the first direction; in the first direction, different first fixing holes 141 are aligned with different second fixing holes 142 to adjust the spacing between the bottom plate 11 and the top plate 13 along the first direction, thereby changing the height of the mounting cavity 15, so that the battery box 10 is suitable for battery cells of different heights. Compared with the above two embodiments, the spacing between the bottom plate 11 and the top plate 13 in this embodiment has a larger adjustment range.

[0062] In the embodiment of the present application, the first fixing hole 141, the second fixing hole 142 and the fastener 143 cooperate with each other to adjust the distance between the bottom plate 11 and the top plate 13. The structure is relatively simple and almost no space is occupied in the installation cavity 15. Therefore, it will not affect the arrangement of the battery cells and other electrical components in the installation cavity 15.

[0063] As another implementation of the adjustment structure 14: the adjustment structure 14 includes a slide groove, a slide rod and a set screw. Specifically, the first plate segment 121 is located on the outside of the second plate segment 122, the slide groove is provided on the inner side wall of the first plate segment 121, the slide rod is provided at the lower end of the second plate segment 122 and is relatively long, and the slide rod can slide in the slide groove along the first direction, and a threaded hole is provided at the position corresponding to the slide groove on the first plate segment 121, and the set screw is screwed into the threaded hole; when the slide rod slides into place in the slide groove along the first direction, the set screw presses on the slide rod to fix the slide rod in the slide groove, thereby realizing the relative fixation of the first plate segment 121 and the second plate segment 122. ; or, the first plate segment 121 is on the inner side of the second plate segment 122, the slide groove is provided on the inner side wall of the second plate segment 122, the slide rod is provided at the upper end of the first plate segment 121 and the slide rod is longer, the slide rod can slide in the slide groove along the first direction, and a threaded hole is provided at a position corresponding to the slide groove on the second plate segment 122, and a set screw is screwed into the threaded hole; when the slide rod slides into place in the slide groove along the first direction, the set screw presses on the slide rod to fix the slide rod in the slide groove, thereby realizing the relative fixation of the first plate segment 121 and the second plate segment 122.

[0064] Optionally, the sliding rod is a rectangular rod, and the sliding groove is a rectangular groove.

[0065] Through the above arrangement, the slide bar can be at any position in the slide slot, thereby being able to finely adjust the distance between the bottom plate 11 and the top plate 13 to more accurately adapt to the height of the battery cell.

[0066] In some embodiments, one of the first fixing hole 141 and the second fixing hole 142 is a threaded hole, the other of the first fixing hole 141 and the second fixing hole 142 is a smooth hole, and the fastener 143 is a threaded fastener, such as a screw, a bolt, etc.

[0067] Specifically, the first plate segment 121 is located on the outer side of the second plate segment 122, the first fixing hole 141 is a smooth hole, the second fixing hole 142 is a threaded hole, the fastener 143 passes through the first fixing hole 141 and is screwed into the second fixing hole 142 to achieve relative fixation of the first plate segment 121 and the second plate segment 122; or, the first plate segment 121 is located on the inner side of the second plate segment 122, the first fixing hole 141 is a threaded hole, the second fixing hole 142 is a smooth hole, the fastener 143 passes through the second fixing hole 142 and is screwed into the first fixing hole 141 to achieve relative fixation of the first plate segment 121 and the second plate segment 122.

[0068] The adoption of the above technical solution is conducive to the assembly and disassembly of the first plate segment 121 and the second plate segment 122 , and the cost is low.

[0069] In other embodiments, the first fixing hole 141 and the second fixing hole 142 may both be plain holes, and the fastener 143 may be a rivet, which eliminates the need to design threaded holes and simplifies processing.

[0070] Please also refer to Figure 2 , Figure 4 , Figure 6 and Figure 8 In some embodiments, there is one first fixing hole 141 and a plurality of second fixing holes 142; along the first direction, the distance S1 between the first fixing hole 141 and the free end of the first plate segment 121 is greater than the distance S2 between the two second fixing holes 142 at the two ends. It can be understood that the second plate segment 122 can be located inside the first plate segment 121, or outside the first plate segment 121.

[0071] The free end of the first plate segment 121 is the upper end of the first plate segment 121 .

[0072] By adopting the above technical solution, no matter which of the first fixing holes 141 cooperates with any of the second fixing holes 142 , the first plate segment 121 can cover all of the second fixing holes 142 to prevent the second fixing holes 142 from being exposed, thereby ensuring the sealing of the battery box 10 .

[0073] In some other embodiments, a plurality of first fixing holes 141 are provided along the first direction, and a single second fixing hole 142 is provided along the first direction; along the first direction, the distance between the second fixing hole 142 and the free end of the second plate segment 122 is greater than the distance between the first fixing holes 141 at both ends. It can be understood that the second plate segment 122 can be located on the inner side of the first plate segment 121, or on the outer side of the first plate segment 121.

[0074] The free end of the second plate segment 122 is the lower end of the second plate segment 122 .

[0075] By adopting the above technical solution, no matter which of the first fixing holes 141 the second fixing holes 142 cooperate with, the second plate segment 122 can cover all the first fixing holes 141 to prevent the first fixing holes 141 from being exposed, thereby ensuring the sealing of the battery box 10.

[0076] In some embodiments, the first plate segment 121 is integrally formed with the bottom plate 11 ; and the second plate segment 122 is integrally formed with the top plate 13 .

[0077] By adopting the above technical solution, it is not only beneficial to the processing and forming of the first plate segment 121 and the second plate segment 122 , but also the battery box 10 only needs to be sealed at the first plate segment 121 and the second plate segment 122 , which is beneficial to ensure the sealing of the battery box 10 .

[0078] In other embodiments, the first plate segment 121 is integrally formed with the bottom plate 11, and the second plate segment 122 is fixed (including but not limited to welding, fastener connection, etc.) to the top plate 13; or, the second plate segment 122 is integrally formed with the bottom plate 11, and the first plate segment 121 is fixed (including but not limited to welding, fastener connection, etc.) to the top plate 13.

[0079] In some other embodiments, the first plate segment 121 is integrally formed with the top plate 13, and the second plate segment 122 is integrally formed with the bottom plate 11; or, the first plate segment 121 is integrally formed with the top plate 13, and the second plate segment 122 is fixed (including but not limited to welding, fastener connection, etc.) to the bottom plate 11; or, the second plate segment 122 is integrally formed with the top plate 13, and the first plate segment 121 is fixed (including but not limited to welding, fastener connection, etc.) to the bottom plate 11.

[0080] Please also refer to Figures 4 to 6 In some embodiments, the battery box 10 further includes a reinforcing plate 16 , the reinforcing plate 16 and the first plate segment 121 form an annular slot 17 , and the second plate segment 122 is inserted into the annular slot 17 .

[0081] The first plate segment 121 , the second plate segment 122 and the reinforcing plate 16 are all annular structures.

[0082] Optionally, the reinforcing plate 16 is located on the inner side or the outer side of the first plate segment 121 to form an annular slot 17 together with the first plate segment 121 .

[0083] Alternatively, the reinforcing plate 16 is located on the inner side or the outer side of the second plate segment 122 to form an annular slot 17 together with the second plate segment 122 .

[0084] It can be understood that when the inner end of the fastener 143 protrudes from the inner side surface of the first plate segment 121 or the second plate segment 122 located on the inner side, an avoidance hole 161 can be opened on the reinforcing plate 16 to avoid the fastener 143.

[0085] By providing the reinforcing plate 16 , the overall strength of the battery box 10 can be improved.

[0086] In other embodiments, the reinforcing plate 16 includes a first reinforcing plate segment and a second reinforcing plate segment spaced apart along the first direction. The first reinforcing plate segment and the first plate segment 121 form an annular slot 17 , and the second reinforcing plate segment and the second plate segment 122 form an annular slot 17 .

[0087] In some embodiments, a sealant is provided in the annular slot 17 to ensure the sealing after the first plate segment 121 and the second plate segment 122 are connected.

[0088] It is understandable that the sealant can be filled in the annular slot 17 or can be painted on the side wall of the annular slot 17 .

[0089] In other embodiments, when the battery box 10 is not provided with the reinforcing plate 16 , a sealant may be provided between the opposite wall surfaces of the first plate segment 121 and the second plate segment 122 .

[0090] The second aspect of the present application provides a battery, which can be used in electrical equipment, such as new energy vehicles; the battery can also be used in energy storage equipment, such as energy storage cabinets, energy storage clusters, etc. The battery includes a battery box 10 as in the first aspect, and a battery cell disposed in an installation cavity 15 of the battery box 10.

[0091] Optionally, the battery cell is a high energy density lithium-ion battery cell, for example, a battery cell of 280Ah or above. The battery cell can be directly installed in the battery box 10, or the battery cell can be assembled into a module and installed in the battery box 10. The battery also includes a battery management system, a thermal management system, an electrical system, etc.

[0092] The battery adopts the above-mentioned battery box 10, and thus has the beneficial effects of the above-mentioned embodiments, which will not be described in detail here.

[0093] The third aspect of the present application proposes an energy storage device. The energy storage device includes a battery as in the second aspect. It can be understood that the energy storage device can be an energy storage cabinet, an energy storage cluster, etc. Among them, the energy storage cabinet can be used as an independent device, the energy storage cluster can be centralized or decentralized, and several energy storage clusters and other accessories can form a prefabricated cabin.

[0094] The energy storage device adopts the above-mentioned battery, and thus has the beneficial effects of the above-mentioned embodiments, which will not be described one by one here.

[0095] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A battery box, comprising a bottom plate, a side plate and a top plate, wherein the side plate is connected between the bottom plate and the top plate to form a mounting cavity for mounting a battery cell, and the bottom plate and the top plate are arranged along a first direction; characterized in that: The side plate is provided with an adjustment structure for adjusting the distance between the bottom plate and the top plate in the first direction.

2. The battery box according to claim 1, characterized in that: The side plate includes a first plate segment connected to the bottom plate and a second plate segment connected to the top plate, and the adjustment structure connects the first plate segment and the second plate segment.

3. The battery box according to claim 2, characterized in that: The adjustment structure includes a first fixing hole provided on the first plate segment, a second fixing hole provided on the second plate segment, and a fastener passing through the first fixing hole and the second fixing hole to connect the first plate segment and the second plate segment; a plurality of the first fixing holes and / or the second fixing holes are arranged at intervals along the first direction.

4. The battery box according to claim 3, characterized in that: One of the first fixing hole and the second fixing hole is a threaded hole, the other of the first fixing hole and the second fixing hole is a plain hole, and the fastener is a threaded fastener.

5. The battery box according to claim 3, characterized in that: There is one first fixing hole, and there are multiple second fixing holes; along the first direction, the distance between the first fixing hole and the free end of the first plate segment is greater than the distance between the two second fixing holes at both ends; or, There are multiple first fixing holes, and only one second fixing hole; along the first direction, the distance between the second fixing hole and the free end of the second plate segment is greater than the distance between the two first fixing holes at both ends.

6. The battery box according to claim 2, characterized in that: The first plate segment is integrally formed with the bottom plate; and / or the second plate segment is integrally formed with the top plate.

7. The battery box according to any one of claims 2 to 6, characterized in that: The battery box also includes a reinforcing plate, which forms an annular slot with the first plate segment, and the second plate segment is inserted into the annular slot; and / or, the reinforcing plate and the second plate segment form an annular slot, and the first plate segment is inserted into the annular slot.

8. The battery box according to claim 7, characterized in that: The annular slot is provided with sealing glue.

9. A battery, characterized in that: It comprises a battery box as claimed in any one of claims 1 to 8, and a battery cell arranged in an installation cavity of the battery box.

10. An energy storage device, characterized in that: Comprising the battery as claimed in claim 9.

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