Battery box and battery pack

Abstract

The utility model provides a kind of battery box and battery pack.The battery box includes at least two stacked housings, housing includes bottom plate and multiple side walls, multiple side walls and bottom plate are jointly enclosed to install cavity, housing has first opening being communicated with install cavity, at least two side walls have interlayer and second opening being communicated with interlayer, in the adjacent two housings of stacking, the bottom plate cover of upper housing is covered on the first opening of lower housing, and it is connected with the top of interlayer of lower housing by connecting structure, connecting structure is loaded into interlayer by second opening.The technical scheme of the utility model can solve the problem that each battery box body in the prior art battery pack needs to be equipped with an independent cover, resulting in increased cost and reduced production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery box and battery pack. Background Technology

[0002] In the field of battery system design, especially in applications such as electric vehicles and energy storage systems, the battery housing plays a crucial role as the carrier and protection unit for the battery module. In traditional battery pack designs, each battery housing is equipped with an independent top cover to seal the housing and ensure the safe and stable operation of the battery module. While this design effectively protects the battery from external environmental influences, the need to bolt each housing to its top cover increases costs and reduces production efficiency. Utility Model Content

[0003] The main objective of this invention is to provide a battery box and battery pack that can solve the problem that each battery box in the existing battery pack needs to be equipped with an independent top cover, which leads to increased costs and reduced production efficiency.

[0004] To achieve the above objectives, according to one aspect of the present invention, a battery box is provided, comprising at least two stacked housings. Each housing includes a bottom plate and multiple side walls, which together with the bottom plate form a mounting cavity. The housing has a first opening communicating with the mounting cavity. At least two side walls have interlayers and second openings communicating with the interlayers. In two adjacent stacked housings, the bottom plate of the upper housing covers the first opening of the lower housing and is connected to the top of the interlayer of the lower housing via a connecting structure. The connecting structure is inserted into the interlayer through the second opening.

[0005] Furthermore, the sidewall with the sandwich structure includes a first plate segment and a second plate segment spaced apart along a first direction, and a third plate segment connected to the top of the first plate segment and the second plate segment. The first plate segment forms the inner wall of the mounting cavity, and a second opening is provided on the second plate segment. In a housing, the first plate segment, the second plate segment, the third plate segment, and the bottom plate together form a sandwich structure. In two adjacent stacked housings, the bottom plate of the upper housing is connected to the third plate segment of the lower housing through a connecting structure.

[0006] Furthermore, the second opening includes an upper opening located at the top of the second plate segment and a lower opening located at the bottom of the second plate segment. Both the upper and lower openings extend along the second direction, and the lengths of the upper opening and the lower opening are different.

[0007] Furthermore, the second opening extends along a second direction from the top of the third plate segment to the bottom of the third plate segment; or, the second opening is located at the bottom of the second plate segment.

[0008] Furthermore, a first connecting hole is provided on the third plate segment, and a second connecting hole is provided on the bottom wall of the interlayer. The first connecting hole and the second connecting hole are provided correspondingly. The connecting structure includes a bolt and a nut. The bolt passes through the corresponding first connecting hole and the second connecting hole in sequence, and the nut is locked on the bolt.

[0009] Furthermore, the top of multiple sidewalls of the housing are provided with grooves, and the multiple grooves are connected end to end to form an annular mounting groove.

[0010] Furthermore, the battery box also includes multiple sealing gaskets, with one sealing gasket provided in the annular mounting groove of each housing.

[0011] Furthermore, there are four sidewalls. Among the four sidewalls, two sidewalls arranged opposite each other along the first direction each have a sandwich layer and a second opening communicating with the sandwich layer; and / or, the sidewall with the sandwich layer is provided with a plurality of second openings, which are spaced apart along the length extension direction of the sidewall.

[0012] Furthermore, the interlayer is provided with reinforcing ribs; or, the sidewall with the interlayer includes a first plate segment and a second plate segment spaced apart along a first direction, and a third plate segment and a fourth plate segment spaced apart along a second direction, the third plate segment being connected to the top of the first plate segment and the second plate segment, the fourth plate segment being connected to the bottom of the first plate segment and the second plate segment, the first plate segment, the second plate segment, the third plate segment and the fourth plate segment together forming the interlayer, and the fourth plate segment being connected to the bottom plate on which it is located.

[0013] According to another aspect of the present invention, a battery pack is provided, comprising: the aforementioned battery box; a top cover covering a first opening in the uppermost housing; and a plurality of battery modules, wherein at least one battery module is disposed within the mounting cavity of the housing.

[0014] Applying the technical solution of this utility model, the battery box includes at least two stacked shells. Each shell includes a bottom plate and multiple side walls. In two adjacent stacked shells, the bottom plate of the upper shell covers the first opening of the lower shell, acting as a top cover for the lower shell. Therefore, except for the topmost shell which requires an additional top cover, the other shells do not need top covers. This reduces the number of required top covers, lowering production costs. Furthermore, since the number of top covers is significantly reduced, it eliminates the need to assemble a top cover for each shell individually and fix it with bolts. The connection between adjacent stacked shells is achieved only through a connecting structure, greatly reducing assembly steps and thus significantly improving production efficiency. In addition, the connecting structure of this application is inserted into the interlayer through a second opening and is not exposed outside the shell, reducing the space occupied by the battery box and making the overall appearance of the battery box more aesthetically pleasing. Attached Figure Description

[0015] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0016] Figure 1 A schematic diagram of the structure of a battery housing in the prior art is shown;

[0017] Figure 2 A schematic diagram of the battery pack structure according to an embodiment of the present invention is shown;

[0018] Figure 3 It shows Figure 2 Enlarged view of point A;

[0019] Figure 4 It shows Figure 2 Enlarged view of point B;

[0020] Figure 5 A cross-sectional view of a battery pack according to an embodiment of the present invention is shown;

[0021] Figure 6 It shows Figure 5 Enlarged view of point C;

[0022] Figure 7 A perspective view of a battery pack according to an embodiment of the present invention is shown;

[0023] Figure 8 It shows Figure 7 Enlarged view of point D.

[0024] The above figures include the following reference numerals:

[0025] 10. Shell; 11. Base plate; 12. Side wall; 121. Interlayer; 1211. Second connecting hole; 122. Second opening; 1221. Upper opening; 1222. Lower opening; 123. First plate segment; 124. Second plate segment; 125. Third plate segment; 1251. First connecting hole; 126. Fourth plate segment; 127. Reinforcing rib; 14. First opening; 15. Groove; 20. Connecting structure; 21. Bolt; 22. Nut; 30. Sealing gasket; 40. Top cover; 50. Battery module; 60. Top cover; 70. Existing battery box; 71. Sub-box. Detailed Implementation

[0026] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] like Figure 1The image shows a prior art battery housing 70, which includes multiple sub-housing units 71 stacked sequentially from top to bottom. Each sub-housing unit 71 is equipped with a top cover 60, which is fixed to the sub-housing unit 71 by bolts. This process is costly, requires a large number of bolts, and is cumbersome, resulting in low production efficiency.

[0028] To solve the above problems, see [reference] Figures 2 to 8 As shown, this utility model provides a battery box, which includes at least two stacked shells 10. Each shell 10 includes a bottom plate 11 and multiple side walls 12. The multiple side walls 12 and the bottom plate 11 together form a mounting cavity. The shell 10 has a first opening 14 communicating with the mounting cavity. At least two side walls 12 have a mezzanine 121 and a second opening 122 communicating with the mezzanine 121. In two adjacent stacked shells 10, the bottom plate 11 of the upper shell 10 covers the first opening 14 of the lower shell 10 and is connected to the top of the mezzanine 121 of the lower shell 10 through a connecting structure 20. The connecting structure 20 is inserted into the mezzanine 121 through the second opening 122.

[0029] In this embodiment, the battery box includes at least two shells 10 stacked sequentially from top to bottom. Multiple side walls 12 and a bottom plate 11 together form a mounting cavity, which can be used to install a battery module 50. During installation, the battery module 50 can be inserted into the mounting cavity through the first opening 14. The first opening 14 of the shells 10 all face upward. In the stacked adjacent shells 10, the bottom plate 11 of the upper shell 10 covers the first opening 14 of the lower shell 10, which is equivalent to the top cover of the lower shell 10. Therefore, except for the top shell 10, which needs to be provided with an additional top cover 40, the other shells 10 do not need to be provided with top covers 40. This can reduce the number of required top covers 40 and reduce production costs. At the same time, since the number of top covers 40 used is greatly reduced, it is not necessary to assemble a top cover 40 for each shell 10 separately and fix it with bolts. Only the connection between the stacked adjacent shells 10 needs to be achieved through the connection structure 20. This greatly reduces the assembly steps and thus can greatly improve production efficiency. In addition, the connection structure 20 of this application is inserted into the interlayer 121 through the second opening 122 and is not exposed outside the housing 10, which can reduce the space occupied by the battery box and make the appearance of the entire battery box more aesthetically pleasing.

[0030] In one embodiment, the connecting structure 20 is a bolt or screw.

[0031] See also Figures 2 to 8As shown, in one embodiment of the present invention, the sidewall 12 with the interlayer 121 includes a first plate segment 123 and a second plate segment 124 spaced apart along a first direction, and a third plate segment 125 connected to the top of the first plate segment 123 and the second plate segment 124. The first plate segment 123 forms the inner wall of the mounting cavity, and the second opening 122 is provided on the second plate segment 124. In a housing 10, the first plate segment 123, the second plate segment 124, the third plate segment 125 and the bottom plate 11 together form the interlayer 121. In two adjacent stacked housings 10, the bottom plate 11 of the upper housing 10 is connected to the third plate segment 125 of the lower housing 10 through a connecting structure 20.

[0032] In this embodiment, the first plate segment 123 and the second plate segment 124 are spaced apart along a first direction, such that the space of the formed interlayer 121 can accommodate the connecting structure 20. The third plate segment 125 is connected to the top of the interlayer 121 formed between the first plate segment 123 and the second plate segment 124. In two stacked adjacent shells 10, the bottom plate 11 of the upper shell 10 and the third plate segment 125 of the lower shell 10 are connected by the connecting structure 20, thereby realizing a fixed connection between the two stacked adjacent shells 10. In addition, the first plate segment 123 forms the inner wall of the mounting cavity, the second plate segment 124 forms the outer wall of the mounting cavity, and the second opening 122 is provided on the second plate segment 124 without affecting the sealing performance of the mounting cavity.

[0033] See also Figures 2 to 8 As shown, in one embodiment of the present invention, the second opening 122 includes an upper opening 1221 located at the top of the second plate segment 124 and a lower opening 1222 located at the bottom of the second plate segment 124. Both the upper opening 1221 and the lower opening 1222 extend along the second direction, and the length of the upper opening 1221 is different from the length of the lower opening 1222.

[0034] In this embodiment, the connecting structure 20 includes a bolt 21 and a nut 22. The length of the upper opening 1221 is shorter than the length of the lower opening 1222. The nut 22 can be inserted into the interlayer 121 through the upper opening 1221, and the bolt 21 can be inserted into the interlayer 121 through the lower opening 1222. With the above arrangement, the structural strength of the second plate segment 124 can be guaranteed, and the nut 22 and bolt 21 can be inserted into the interlayer 121, thereby achieving a fixed connection between the bottom plate 11 of the upper shell 10 and the third plate segment 125 of the lower shell 10.

[0035] In one embodiment, the connecting structure 20 includes a bolt 21 and a nut 22. The length of the upper opening 1221 is greater than the length of the lower opening 1222. The bolt 21 can be inserted into the interlayer 121 through the upper opening 1221, and the nut 22 can be inserted into the interlayer 121 through the lower opening 1222.

[0036] See also Figures 2 to 8 As shown, in one embodiment of the present invention, the second opening 122 extends along the second direction from the top of the third plate segment 125 to the bottom of the third plate segment 125.

[0037] In this embodiment, the second opening 122 extends from the top of the third plate segment 125 to the bottom of the third plate segment 125 along the second direction, which facilitates the insertion of the connecting structure 20 into the interlayer 121.

[0038] See also Figures 2 to 8 As shown, in one embodiment of the present invention, the second opening 122 is disposed at the lower part of the second plate segment 124.

[0039] In this embodiment, the connecting structure 20 is a screw, and the second opening 122 is located at the lower part of the second plate segment 124. The screw can be inserted into the interlayer 121 through the second opening 122 to achieve a fixed connection between the bottom plate 11 of the upper shell 10 and the third plate segment 125 of the lower shell 10.

[0040] See also Figures 2 to 8 As shown, in one embodiment of the present invention, a first connecting hole 1251 is provided on the third plate segment 125, and a second connecting hole 1211 is provided on the bottom wall of the interlayer 121. The first connecting hole 1251 and the second connecting hole 1211 are provided correspondingly. The connecting structure 20 includes a bolt 21 and a nut 22. The bolt 21 passes through the corresponding first connecting hole 1251 and the second connecting hole 1211 in sequence, and the nut 22 is locked on the bolt 21.

[0041] The above configuration enables a fixed connection between the base plate 11 of the upper housing 10 and the third plate segment 125 of the lower housing 10. Furthermore, the connection method of the bolts 21 and nuts 22 is reversible, allowing for easy disassembly and reassembly, which facilitates the maintenance and upgrade of the battery box. When it is necessary to inspect or replace the battery module 50, the connection structure 20 can be quickly disassembled without damaging the housing 10 or internal components.

[0042] See also Figures 2 to 8 As shown, in one embodiment of this utility model, there are multiple first connecting holes 1251 and multiple second connecting holes 1211. The multiple first connecting holes 1251 are spaced apart along the length direction of the third plate segment 125, and the multiple second connecting holes 1211 are arranged one-to-one with the multiple first connecting holes 1251. There are multiple connecting structures 20, each including bolts and nuts. After the bolts 21 pass through the first connecting holes 1251 and the second connecting holes 1211 in sequence, they can lock two adjacent stacked shells 10 together with the nuts.

[0043] See also Figures 2 to 8As shown, in one embodiment of the present invention, the top of the multiple sidewalls 12 of the housing 10 are provided with grooves 15, and the multiple grooves 15 are connected end to end to form an annular mounting groove.

[0044] In this embodiment, the annular mounting groove provides installation space for the sealing gasket 30, ensuring the continuity of the seal along the entire circumference of the top of the housing 10. This effectively prevents external impurities such as moisture and dust from seeping in from the joints of different side walls 12, protecting the battery module 50 from environmental damage. Furthermore, since the groove 15 has a certain depth, it can serve as a positioning and guiding reference for the sealing gasket 30, ensuring the accuracy of the sealing gasket 30 during installation and reducing sealing failures caused by misalignment.

[0045] See also Figures 2 to 8 As shown, in one embodiment of the present invention, the battery box further includes a plurality of sealing gaskets 30, and a sealing gasket 30 is provided in the annular mounting groove of each housing 10.

[0046] In this embodiment, the sealing gasket 30 is concealed within the annular mounting groove of the housing 10 and is not exposed, thus maintaining the clean appearance of the battery box and improving the product's aesthetics. The annular mounting groove design allows the sealing gasket 30 to be installed without occupying additional space, contributing to a compact battery box and improving space utilization.

[0047] When the housings 10 are stacked, the bottom plate 11 and the cover of the upper housing 10 press on the sealing gasket 30. The thickness of the sealing gasket 30 after compression is the depth of the groove. After the two adjacent housings 10 are stacked and connected, the compression amount of the sealing gasket 30 can be well guaranteed, thereby ensuring the sealing effect.

[0048] It should be noted that the second plate segment 124 can enhance the rigidity of the shell and prevent the first plate segment 123 from deforming under the tension of the bolt 21 when vibrating in the vertical direction, which would cause a change in the compression of the sealing gasket 30 and result in poor sealing.

[0049] See also Figures 2 to 8 As shown, in one embodiment of the present invention, there are four sidewalls 12. Among the four sidewalls 12, two sidewalls 12 arranged opposite each other along the first direction each have a sandwich layer 121 and a second opening 122 communicating with the sandwich layer 121.

[0050] In this embodiment, each housing 10 has four side walls 12. In two adjacent stacked housings 10, the bottom plate 11 of the upper housing 10 is connected to the top of the interlayer 121 of the lower housing 10 through the connecting structure 20. This enables the corresponding connection of the two side walls 12 of the two adjacent stacked housings 10 that are arranged opposite to each other in the first direction. Compared with the fixed connection of all four side walls 12, this reduces the use of the connecting structure 20, lowers the cost, and improves production efficiency.

[0051] See also Figures 2 to 8 As shown, in one embodiment of the present invention, a plurality of second openings 122 are provided on the side wall 12 with the interlayer 121, and the plurality of second openings 122 are spaced apart along the length extension direction of the side wall 12.

[0052] In this embodiment, there are multiple connecting structures 20, and each of the multiple connecting structures 20 is corresponding to a multiple second opening 122. The multiple second openings 122 are spaced apart along the length of the sidewall 12. In other words, the multiple connecting structures 20 are also spaced apart along the length of the sidewall 12, thereby forming multiple connection points in the length of the sidewall 12 to ensure connection stability.

[0053] See also Figures 2 to 8 As shown, in one embodiment of the present invention, a reinforcing rib 127 is provided inside the interlayer 121.

[0054] Through the above-mentioned arrangement, the reinforcement rib 127 can significantly increase the mechanical strength and rigidity of the side wall 12. By forming a support structure in the interlayer 121, the deformation of the housing 10 under external impact or pressure is reduced, effectively protecting the battery module 50 in the mounting cavity from physical damage.

[0055] See also Figures 2 to 8 As shown, in one embodiment of the present invention, the sidewall 12 with the interlayer 121 includes a first plate segment 123 and a second plate segment 124 spaced apart along a first direction, and a third plate segment 125 and a fourth plate segment 126 spaced apart along a second direction. The third plate segment 125 is connected to the top of the first plate segment 123 and the second plate segment 124, and the fourth plate segment 126 is connected to the bottom of the first plate segment 123 and the second plate segment 124. The first plate segment 123, the second plate segment 124, the third plate segment 125 and the fourth plate segment 126 together form the interlayer 121, and the fourth plate segment 126 is connected to the bottom plate 11 on which it is located.

[0056] In this embodiment, the fourth plate segment 126 forms the bottom wall of the interlayer 121. For the same housing 10, the fourth plate segment 126 is fixedly connected to the bottom plate 11 of the housing 10. In two stacked adjacent housings 10, after the connecting structure 20 is inserted into the interlayer 121 through the second opening 122, it passes through the fourth plate segment 126 and a portion of the bottom plate 11 connected to the fourth plate segment 126 in sequence, and is then fixedly connected to the top of the interlayer 121 of the lower housing 10.

[0057] See also Figures 2 to 8 As shown, according to another aspect of the present invention, a battery pack is provided, comprising: the aforementioned battery box; a top cover 40 covering the first opening 14 of the uppermost housing 10; and a plurality of battery modules 50, wherein at least one battery module 50 is disposed within the mounting cavity of the housing 10.

[0058] In this embodiment, the battery box of the battery pack has all the technical solutions and effects of the aforementioned battery box, which will not be repeated here.

[0059] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects: The battery box includes at least two stacked shells, each shell including a bottom plate and multiple side walls. In two adjacent stacked shells, the bottom plate of the upper shell covers the first opening of the lower shell, acting as a top cover for the lower shell. Therefore, except for the topmost shell which requires an additional top cover, the other shells do not need top covers. This reduces the number of required top covers and lowers production costs. Furthermore, since the number of top covers is significantly reduced, it is not necessary to assemble a top cover for each shell individually or fix it with bolts. The connection between adjacent stacked shells is achieved only through a connecting structure, which greatly reduces assembly steps and thus significantly improves production efficiency. In addition, the connecting structure of this application is inserted into the interlayer through a second opening and is not exposed outside the shell, which reduces the space occupied by the battery box and makes the overall appearance of the battery box more aesthetically pleasing.

[0060] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0061] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0062] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery box, characterized in that, The device comprises at least two stacked housings (10), each housing (10) including a base plate (11) and a plurality of side walls (12), the plurality of side walls (12) together with the base plate (11) forming a mounting cavity, the housing (10) having a first opening (14) communicating with the mounting cavity, at least two of the side walls (12) having a mezzanine (121) and a second opening (122) communicating with the mezzanine (121), in two adjacent stacked housings (10), the base plate (11) of the upper housing (10) covers the first opening (14) of the lower housing (10) and is connected to the top of the mezzanine (121) of the lower housing (10) by a connecting structure (20), the connecting structure (20) being inserted into the mezzanine (121) through the second opening (122).

2. The battery box according to claim 1, characterized in that, The sidewall (12) having the interlayer (121) includes a first plate segment (123) and a second plate segment (124) spaced apart along a first direction, and a third plate segment (125) connected to the top of the first plate segment (123) and the second plate segment (124). The first plate segment (123) forms the inner wall of the mounting cavity, and the second opening (122) is provided on the second plate segment (124). In a housing (10), the first plate segment (123), the second plate segment (124), the third plate segment (125) and the bottom plate (11) together form the interlayer (121). In two stacked adjacent housings (10), the bottom plate (11) of the upper housing (10) is connected to the third plate segment (125) of the lower housing (10) through the connecting structure (20).

3. The battery box according to claim 2, characterized in that, The second opening (122) includes an upper opening (1221) located at the top of the second plate segment (124) and a lower opening (1222) located at the bottom of the second plate segment (124). The upper opening (1221) and the lower opening (1222) both extend along a second direction, and the length of the upper opening (1221) is different from the length of the lower opening (1222).

4. The battery box according to claim 2, characterized in that, The second opening (122) extends along a second direction from the top of the third plate segment (125) to the bottom of the third plate segment (125); or, the second opening (122) is located at the lower part of the second plate segment (124).

5. The battery box according to any one of claims 2 to 4, characterized in that, The third plate segment (125) is provided with a first connecting hole (1251), and the bottom wall of the interlayer (121) is provided with a second connecting hole (1211). The first connecting hole (1251) and the second connecting hole (1211) are provided correspondingly. The connecting structure (20) includes a bolt (21) and a nut (22). The bolt (21) passes through the corresponding first connecting hole (1251) and the second connecting hole (1211) in sequence, and the nut (22) is locked on the bolt (21).

6. The battery box according to any one of claims 1 to 4, characterized in that, The top of each of the multiple sidewalls (12) of the housing (10) is provided with a groove (15), and the multiple grooves (15) are connected end to end to form an annular mounting groove.

7. The battery box according to claim 6, characterized in that, The battery box also includes a plurality of sealing gaskets (30), and each of the housings (10) is provided with a sealing gasket (30) in the annular mounting groove.

8. The battery box according to any one of claims 1 to 4, characterized in that, There are four sidewalls (12). Among the four sidewalls (12), two sidewalls (12) arranged opposite each other along the first direction each have the interlayer (121) and a second opening (122) communicating with the interlayer (121); and / or, the sidewall (12) having the interlayer (121) is provided with a plurality of second openings (122), and the plurality of second openings (122) are spaced apart along the length extension direction of the sidewall (12).

9. The battery box according to claim 1, characterized in that, The interlayer (121) is provided with reinforcing ribs (127); or, the sidewall (12) having the interlayer (121) includes a first plate segment (123) and a second plate segment (124) spaced apart along a first direction, and a third plate segment (125) and a fourth plate segment (126) spaced apart along a second direction. The third plate segment (125) is connected to the top of the first plate segment (123) and the second plate segment (124), and the fourth plate segment (126) is connected to the bottom of the first plate segment (123) and the second plate segment (124). The first plate segment (123), the second plate segment (124), the third plate segment (125), and the fourth plate segment (126) together form the interlayer (121), and the fourth plate segment (126) is connected to the bottom plate (11) to which it is located.

10. A battery pack, characterized in that, include: The battery box according to any one of claims 1 to 9; A top cover (40) is provided over the first opening (14) of the uppermost housing (10); Multiple battery modules (50), at least one of the battery modules (50) is disposed in the mounting cavity of the housing (10).

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