Battery box body and battery pack

Abstract

The utility model provides a battery box body which comprises a plurality of mutually connected single box bodies, and the single box bodies are used for accommodating battery modules; a channel is arranged between every two adjacent single boxes, and the channels are used for electrically connecting the battery modules in the single boxes. According to the battery box provided by the utility model, the battery modules in each single box can be uniformly and externally connected, so that the management and control are convenient, and the cost is reduced. The utility model further provides a battery pack.

Description

Technical Field

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

[0002] With the increasing popularity of electric vehicles, people's requirements for the cruising range of electric vehicles are also getting higher and higher. The improvement of the cruising range means that electric vehicles need a larger power storage capacity. In the prior art, generally, multiple battery boxes are stacked in an electric vehicle to increase the power storage capacity of the electric vehicle, thereby improving the cruising range.

[0003] However, in the prior art, multiple battery boxes are only simply stacked, and the battery modules included in different battery boxes are respectively externally electrically connected, resulting in complex management and control and high costs. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a battery box body, in which the battery modules in each single box can be uniformly externally electrically connected, which is convenient for management and control and is beneficial to reducing costs.

[0005] An embodiment of the utility model provides a battery box body, which includes a plurality of interconnected single boxes, and the single boxes are used for accommodating battery modules; a channel is provided between every two adjacent single boxes, and the channel is used for electrically connecting the battery modules in each single box.

[0006] In a feasible manner, the single box is assembled by plate bodies; an accommodating cavity for accommodating battery modules is provided in the single box, and the accommodating cavity is formed by enclosing the plate bodies; a through hole for forming the channel is provided on the plate body between the accommodating cavities of every two adjacent single boxes.

[0007] In a feasible manner, at least one plate body of at least one single box is provided with a weight reduction hole.

[0008] In a feasible manner, the plate body includes a mounting plate and a surrounding plate connected to the edge of the mounting plate, and the accommodating cavity is formed by enclosing the mounting plate and the surrounding plate; an opening is provided on the opposite side of the single box to the mounting plate; the single box has a first direction, and the first direction points from the mounting plate to the opening; a plurality of single boxes are stacked along the first direction, and the through hole is provided on the mounting plate between the accommodating cavities of every two adjacent single boxes.

[0009] In a feasible manner, the mounting plate has a length direction, and the through hole is provided at one end of the mounting plate along the length direction.

[0010] In one possible implementation, the first direction is parallel to the thickness direction of the monomer box; and / or, the first direction is the vertically upward direction.

[0011] In one possible implementation, the battery box body further includes a box cover; along the first direction, the box cover is connected to the opening of the last monomer box among the plurality of monomer boxes.

[0012] In one possible implementation, a first sealing ring is clamped between two adjacent monomer boxes; and / or, a second sealing ring is clamped between the box cover and the monomer box.

[0013] In one possible implementation, along the first direction, on the mounting plates of all the monomer boxes except the first monomer box among the plurality of monomer boxes, through holes are provided.

[0014] In one possible implementation, the number of the monomer boxes is greater than or equal to three; the through holes correspond to each other in the first direction.

[0015] In one possible implementation, among the plurality of monomer boxes, a mounting portion for mounting a battery pack control unit is provided on one of the monomer boxes; and / or, among the plurality of monomer boxes, a maintenance window is provided on at least one of the monomer boxes.

[0016] Another embodiment of the present invention further provides a battery pack, including a battery pack control unit and the battery box body described above; a battery module is provided in each monomer box, and the battery modules in each monomer box are electrically connected through the channel; the battery pack control unit is disposed on one of the monomer boxes, and the battery pack control unit is electrically connected to the battery modules in each monomer box.

[0017] The battery box body provided by the present invention, by providing a plurality of monomer boxes, with a channel provided between every two adjacent monomer boxes, after the battery modules in each monomer box are electrically connected through this channel inside the battery box body, and then externally connected uniformly, it is convenient for management and control; moreover, only one external component for external electrical connection needs to be provided for each battery box body, which is beneficial to the sealing of the battery box body, and also beneficial to reducing the cost and the weight of the battery pack, and improving the energy density of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the battery pack in the embodiment of the present invention.

[0019] Figure 2 is Figure 1 an exploded structural diagram of

[0020] Figure 3It is a schematic structural diagram of the monomer box at the top in the embodiment of the present utility model.

[0021] Figure 4 It is Figure 3 the bottom-up perspective view.

[0022] Figure 5 It is a schematic structural diagram of the monomer box at the bottom in the embodiment of the present utility model.

[0023] Figure 6 It is a schematic cross-sectional view of the battery box body in the embodiment of the present utility model.

[0024] Figure 7 It is a schematic structural diagram of the battery pack in another embodiment of the present utility model.

[0025] Figure 8 It is Figure 7 the exploded structural diagram.

[0026] Figure 9 It is Figure 7 the schematic cross-sectional view of the battery box body in

[0027] In the figure: 1 - battery box body, 2 - monomer box, 2A - channel, 21 - accommodation cavity, 22 - plate body, 22A - mounting plate, 22B - enclosing plate, 221 - through hole, 222 - opening, 223 - weight reduction hole, 223A - blind hole, 223B - through hole, 23 - first sealing ring, 24 - second sealing ring, 25 - mounting part, 26 - through hole, 27 - positioning component, 271 - positioning hole, 272 - positioning pin, 28 - counterbore, 291 - spacer post, 292 - groove, 293 - spacer platform, 3 - box cover, 4 - battery module, 5 - battery pack control unit, 51 - third sealing ring. Detailed implementation manners

[0028] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0029] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present utility model are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence.

[0030] The up, down, left, right, front, back, top, bottom, etc. (if any) orientation terms involved in the description and claims of the present utility model are defined based on the position of the structure in the figure and the positions of the structures relative to each other in the figure, only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of orientation terms should not limit the scope of protection requested by the present utility model.

[0031] As shown Figures 1 to 6 in the figure, the battery box body 1 provided by the embodiment of the present utility model includes a plurality of (at least two) interconnected single boxes 2, and the single boxes 2 are used to accommodate battery modules 4. A channel 2A is provided between every two adjacent single boxes 2, and the channel 2A is used for the battery modules 4 in each single box 2 to be electrically connected. Specifically, the channel 2A can be used for the battery modules 4 in adjacent single boxes 2 to be electrically connected, or for the battery modules 4 in non-adjacent single boxes 2 to be electrically connected.

[0032] For the battery box body 1 provided in this embodiment, by providing a plurality of single boxes 2, a channel 2A is provided between every two adjacent single boxes 2, and after the battery modules 4 in each single box 2 are electrically connected (in series and / or in parallel) through the channel 2A in the battery box body 1, they are then externally electrically connected in a unified manner, which is convenient for management and control; moreover, only one external component (such as the battery pack control unit 5 described below) for external electrical connection needs to be provided for each battery box body 1, which is beneficial to the sealing of the battery box body 1, is also beneficial to reducing costs and the weight of the battery pack, and improving the energy density of the battery pack.

[0033] As shown Figures 2 to 6 in the figure, as an implementation manner, the single box 2 is assembled by a plate body 22. A receiving cavity 21 for accommodating the battery module 4 is provided in the single box 2, and the receiving cavity 21 is formed by surrounding the plate body 22. A through hole 221 for forming the channel 2A is provided on the plate body 22 between the receiving cavities 21 of every two adjacent single boxes 2, and the receiving cavities 21 of two adjacent single boxes 2 are communicated through the through hole 221, and the battery modules 4 in the adjacent single boxes 2 can be electrically connected through the through hole 221.

[0034] As shown Figures 2 to 6 in the figure, as an implementation manner, the plate body 22 includes a mounting plate 22A and a surrounding plate 22B connected to the edge of the mounting plate 22A. The battery module 4 can be placed on the mounting plate 22A or fixedly connected to the mounting plate 22A; the surrounding plates 22B connected to the mounting plate 22A enclose an annular structure, and the receiving cavity 21 is formed by surrounding the mounting plate 22A and the surrounding plate 22B. The single box 2 is provided with an opening 222 on the opposite side of the mounting plate 22A, and the battery module 4 can be installed into the single box 2 through the opening 222. The single box 2 has a first direction X1, and the first direction X1 points from the mounting plate 22A to the opening 222. A plurality of single boxes 2 are stacked along the first direction X1, and a through hole 221 is provided on the mounting plate 22A between the receiving cavities 21 of every two adjacent single boxes 2. That is, along the first direction X1, the receiving cavities 21 of every two adjacent single boxes 2 can be communicated through the opening 222 on the previous (i.e., the upstream) single box 2 and the through hole 221 on the subsequent (i.e., the downstream) single box 2 among the two single boxes 2.

[0035] Specifically, in this embodiment, the mounting plate 22A has a square structure, and the surrounding plates 22B connected to the mounting plate 22A enclose a square annular structure. The mounting plate 22A is connected with four surrounding plates 22B, and the four surrounding plates 22B are divided into two groups, each group including two relatively arranged surrounding plates 22B. The four surrounding plates 22B are respectively fixedly connected to the four side edges of the mounting plate 22A.

[0036] As Figures 3 to 6 shown, as an implementation manner, the first direction X1 is the vertically upward direction, the opening 222 is located at the top of the corresponding single cell 2, and a plurality of single cells 2 are arranged in a vertical stack. Along the first direction X1, the accommodation cavities 21 of every two adjacent single cells 2 can be communicated through the opening 222 on the lower (i.e., the front / upstream) single cell 2 and the through hole 221 on the upper (i.e., the rear / downstream) single cell 2 among these two single cells 2. Of course, in other embodiments, the first direction X1 can also be other directions. For example, the first direction X1 is the horizontal direction.

[0037] As Figures 3 to 6 shown, as an implementation manner, the first direction X1 is parallel to the thickness direction of the single cell 2, that is, a plurality of single cells 2 are stacked along their thickness directions. In this way, when the number of stacked single cells 2 is not large, the maximum outer dimension of the battery box body 1 can be made smaller. Of course, in other embodiments, the first direction X1 can also be other directions. For example, the first direction X1 is parallel to the length direction or the width direction of the single cell 2.

[0038] As Figures 2 to 4 shown, as an implementation manner, the mounting plate 22A has a length direction L, and the through hole 221 is arranged at one end of the mounting plate 22A along its length direction L, thereby facilitating the electrical connection between the battery modules 4 in adjacent single cells 2, reducing the occupied area of the through hole 221, and reducing the influence on the outer dimension of the single cell 2.

[0039] As Figures 3 to 6 shown, as an implementation manner, along the first direction X1, among a plurality of single cells 2, except for the first single cell 2 (in this embodiment, that is, the single cell 2 located at the bottommost, that is, the single cell 2 located at the most upstream along the first direction X1), through holes 221 are provided on the mounting plates 22A of the other single cells 2.

[0040] As Figures 3 to 6 shown, as an implementation manner, the number of single cells 2 is two, and through holes 221 are provided only on the mounting plate 22A of the single cell 2 located at the topmost (that is, the most downstream along the first direction X1).

[0041] As Figures 7 to 9As shown, as another implementation manner, the number of the single boxes 2 is greater than or equal to three ( Figures 7 to 9 shown as three in Figures 7 to 9 ); the through openings 221 correspond to each other in the first direction X1. That is, along the first direction X1, among the multiple single boxes 2, except for the first single box 2, the through openings 221 on the mounting plates 22A of the other single boxes 2 correspond to each other in the first direction X1 (that is, arranged in alignment and spaced along the first direction X1, that is, corresponding up and down), so as to facilitate the electrical connection between the battery modules 4 in adjacent single boxes 2.

[0042] As Figure 2 shown, as an implementation manner, a first sealing ring 23 is clamped between two adjacent single boxes 2, so as to ensure the seal between the single boxes 2.

[0043] As Figure 2 and Figure 5 shown, as an implementation manner, in each two adjacent single boxes 2, at least one of the single boxes 2 is provided with an embedding groove 292 on one side close to the other single box 2, and the first sealing ring 23 is located in the embedding groove 292 to limit the compression amount of the first sealing ring 23 and avoid damage to the first sealing ring 23 due to excessive compression.

[0044] As Figure 2 and Figure 5 shown, as an implementation manner, in each two adjacent single boxes 2, the embedding groove 292 is arranged at the top of the lower single box 2 (specifically arranged on the top surface of the surrounding plate 22B of the single box 2 where it is located), and both the embedding groove 292 and the first sealing ring 23 are of an annular structure. There are intervals between the embedding groove 292 and the inner surface and the outer surface of the single box 2 (that is, the embedding groove 292 is located between the inner surface and the outer surface of the single box 2), and an interval platform 293 is formed between the embedding groove 292 and the inner surface of the single box 2, and the interval platform 293 is of an annular structure. Since the lower single box 2 is subjected to the gravity extrusion of the upper single box 2 and the battery module 4, the interval platform 293 can contact the bottom surface of the upper single box 2, playing a certain supporting role, improving the structural strength of the single box 2, and limiting the compression amount of the first sealing ring 23.

[0045] As an implementation manner, each two adjacent single boxes 2 are fixedly connected through a first screwing member (not shown in the figure).

[0046] As Figures 2 to 5As shown in the figure, as an implementation manner, the first screwing member is a bolt. The first screwing member is screwed and fixed to two adjacent monomer boxes 2 along the second direction X2 (i.e., the second direction X2 is the screwing direction of the first screwing member), and the second direction X2 is parallel to the first direction X1. Along the second direction X2, a countersunk hole 28 is provided on the previous (i.e., the upstream) monomer box 2. After the first screwing member passes through the countersunk hole 28 on the previous monomer box 2, it is screwed and fixed to the subsequent (i.e., the downstream) monomer box 2. That is, the head of the first screwing member is located within the countersunk hole 28, thereby preventing the first screwing member from occupying additional space in the first direction X1 and affecting the external dimensions of the battery box body 1.

[0047] As an implementation manner, when the number of monomer boxes 2 is greater than or equal to three, among any three adjacent monomer boxes 2, the screwing parts of two adjacent monomer boxes 2 in one group are staggered from the screwing parts of two adjacent monomer boxes 2 in another group, thereby preventing interference.

[0048] As Figures 2 to 5 shown in the figure, as an implementation manner, each two adjacent monomer boxes 2 are connected in alignment through a positioning component 27. Specifically, the positioning component 27 includes a positioning hole 271 and a positioning pin 272. The positioning hole 271 and the positioning pin 272 are respectively provided on two adjacent monomer boxes 2, and the positioning pin 272 can be inserted into the positioning hole 271 for alignment.

[0049] As Figures 1 to 3 shown in the figure, as an implementation manner, the battery box body 1 further includes a box cover 3; along the first direction X1, the box cover 3 is connected to the opening 222 of the last monomer box 2 (in this embodiment, that is, the monomer box 2 at the topmost position) among a plurality of monomer boxes 2.

[0050] As Figure 2 shown in the figure, as an implementation manner, a second sealing ring 24 is clamped between the box cover 3 and the monomer box 2, thereby ensuring the seal between the box cover 3 and the monomer box 2.

[0051] As Figure 2 and Figure 3 shown in the figure, as an implementation manner, spacer posts 291 are provided on the last monomer box 2. Specifically, the spacer posts 291 are provided on the top surface of the surrounding plate 22B of the monomer box 2. There is a gap between the spacer posts 291 and the inner surface of the monomer box 2. The second sealing ring 24 is provided at a position on the side of the spacer posts 291 facing the accommodation cavity 21. The spacer posts 291 are used to limit the compression amount of the second sealing ring 24 to prevent the second sealing ring 24 from being over-compressed and damaged; moreover, since the weight of the box cover 3 is relatively small, only a few spacer posts 291 need to be provided to save materials.

[0052] As an implementation manner, the lid 3 and the single box 2 are fixedly connected through a second screwing member (not shown in the figure), and the second screwing member may specifically be a bolt or the like.

[0053] As Figure 2 and Figure 6 shown, as an implementation manner, along the first direction X1, the dimension of the surrounding plate 22B of the last single box 2 among the plurality of single boxes 2 in the first direction X1 (i.e., the height of the accommodation cavity) is smaller than the dimension of the battery module 4 in the first direction X1 (i.e., the height of the battery module 4). The lid 3 is a structure recessed along the first direction X1, and the lid 3 and the last single box 2 cooperate to accommodate the battery module 4. Since the wall thickness of the single box 2 is generally greater than the wall thickness of the lid 3, with such a setting, the installation height of the last single box 2 can be reduced, which can not only save material costs but also reduce the weight.

[0054] As an implementation manner, the lid 3 includes a hem (not labeled in the figure) for contacting the spacer post 291. The hem of the lid 3 and the single box 2 are fixedly connected through a second screwing member, and the screwing direction of the second screwing member is opposite to the first direction X1. Thus, the hem with a relatively thin wall thickness on the lid 3 is conducive to the quick screwing connection between the lid 3 and the single box 2.

[0055] As Figures 1 to 9 shown, as an implementation manner, along the first direction X1, among the plurality of single boxes 2 except the last single box 2, the dimension of the surrounding plate 22B of other single boxes 2 in the first direction X1 is greater than or equal to the dimension of the battery module 4 in the first direction X1, so that other single boxes 2 except the single box 2 connected to the lid 3 can completely accommodate the battery module 4.

[0056] As Figures 2 to 5 shown, as an implementation manner, at least one weight-reducing hole 223 is provided on at least one plate body 22 of at least one single box 2; the weight-reducing hole 223 includes a blind hole 223A provided on the inner surface and / or the outer surface of the plate body 22, and / or, the weight-reducing hole 223 includes a buried hole (not shown in the figure) provided inside the plate body 22, and / or, the weight-reducing hole 223 includes a through hole 223B penetrating through the plate body 22, and there is a gap between the through hole 223B and the inner surface of the plate body 22 where it is located. Among them, both the blind hole 223A and the buried hole do not penetrate the plate body 22, and there is a gap between the through hole 223B and the inner surface of the plate body 22 where it is located. Thus, not only can the weight be reduced and materials be saved, but also the sealing performance of the single box 2 can be ensured; at the same time, the weight-reducing hole 223 is also conducive to forming a rib structure on the single box 2 to improve the structural strength of the single box 2.

[0057] As Figure 2 and Figure 5As shown, as an implementation manner, among the multiple single boxes 2, an installation part 25 for installing the battery pack control unit 5 is provided on one of the single boxes 2; and / or, among the multiple single boxes 2, at least one single box 2 is provided with a maintenance window (not shown in the figure).

[0058] As an implementation manner, the maintenance window is provided for maintaining the battery pack control unit 5. Specifically, when the battery pack control unit 5 is installed outside the single box 2, there is no need to set a maintenance window at this time; when the battery pack control unit 5 is installed inside the single box 2, a maintenance window can be set at the position of the single box 2 corresponding to the battery pack control unit 5 at this time, so as to maintain the battery pack control unit 5. Specifically, the maintenance window can be to set a maintenance opening on the single box 2 and set a cover plate at the maintenance opening, and the cover plate is detachably connected to the single box 2 and seals the maintenance opening. More specifically, the battery pack control unit 5 can be installed on the inner surface of the maintenance window, and the battery pack control unit 5 can be conveniently maintained by opening the maintenance window.

[0059] As Figure 1 , Figure 2 and Figure 6 As shown, the embodiment of the present invention further provides a battery pack, including the above-mentioned battery box body 1, and battery modules 4 are provided in each single box 2 of the battery box body 1, and the battery modules 4 in each single box 2 are electrically connected through a channel 2A.

[0060] Specifically, the battery modules 4 in each adjacent single box 2 are electrically connected through a first electrical connector (not shown in the figure), and the first electrical connector passes through the corresponding channel 2A, and the first electrical connector can be a cable, a bus bar, etc.

[0061] As Figure 1 and Figure 2 As shown, as an implementation manner, the battery pack further includes a battery pack control unit 5, the battery pack control unit 5 is arranged on one of the single boxes 2, the battery pack control unit 5 is electrically connected to the battery modules 4 in each single box 2, and the battery pack control unit 5 is used for the external electrical connection of the battery pack. Specifically, the battery pack control unit 5 can be electrically connected to the battery module 4 in one of the single boxes 2, and then electrically connected to the battery modules 4 in other single boxes 2 through the battery module 4 in this single box 2; the battery pack control unit 5 can also be directly electrically connected to the battery modules 4 in each single box 2.

[0062] As Figure 1 and Figure 2As shown, as an implementation manner, the battery pack control unit 5 is connected to the outer wall of the corresponding single cell box 2, and a third sealing ring 51 is clamped between the battery pack control unit 5 and the outer wall of the single cell box 2. A through hole 26 is provided on the single cell box 2 at the position corresponding to the battery pack control unit 5. The through hole 26 is used for the battery pack control unit 5 to be electrically connected to the battery module 4. The battery pack control unit 5 covers the through hole 26 and cooperates with the third sealing ring 51 to ensure the sealing performance of the single cell box 2. With such a setting, only one battery pack control unit 5 is used for unified external electrical connection, which can not only save costs and reduce weight, but also does not require multiple through holes 26 (or multiple inspection windows for inspecting the battery pack control unit 5 when the battery pack control unit 5 is installed in the single cell box 2) to be opened on the battery box body 1, thereby reducing the risk of sealing failure of the battery box body 1.

[0063] Specifically, the battery pack control unit 5 and the battery module 4 are electrically connected through a second electrical connector (not shown in the figure). The second electrical connector passes through the through hole 26. The second electrical connector can be a cable, an FPC, etc.

[0064] As another implementation manner, the battery pack control unit 5 is arranged in the corresponding single cell box 2, and an inspection window is provided on the single cell box 2 at the position corresponding to the battery pack control unit 5.

[0065] The battery box body 1 provided by the embodiment of the present invention is provided with a plurality of single cell boxes 2. A channel 2A is provided between every two adjacent single cell boxes 2. The battery modules 4 in each single cell box 2 can be electrically connected through the channel 2A in the battery box body 1 and then be externally electrically connected in a unified manner, so as to facilitate management and control. Moreover, only one external component for external electrical connection needs to be provided for each battery box body 1, which is beneficial to reducing costs and the weight of the battery pack and improving the energy density of the battery pack.

[0066] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A battery box, characterized in that, It includes a plurality of interconnected monomer boxes (2), and the monomer boxes (2) are used to accommodate battery modules (4); a channel (2A) is provided between every two adjacent monomer boxes (2), and the channel (2A) is used for electrically connecting the battery modules (4) in each monomer box (2).

2. The battery box according to claim 1, characterized in that, The monomer box (2) is assembled by a plate body (22); an accommodation cavity (21) for accommodating the battery module (4) is provided in the monomer box (2), and the accommodation cavity (21) is formed by enclosing the plate body (22); a through hole (221) for forming the channel (2A) is provided on the plate body (22) between the accommodation cavities (21) of every two adjacent monomer boxes (2).

3. The battery box according to claim 2, characterized in that, At least one plate body (22) of at least one monomer box (2) is provided with a weight-reducing hole (223).

4. The battery box according to claim 2, characterized in that, The plate body (22) includes a mounting plate (22A) and a surrounding plate (22B) connected to the edge of the mounting plate (22A), and the accommodation cavity (21) is formed by enclosing the mounting plate (22A) and the surrounding plate (22B); the monomer box (2) is provided with an opening (222) on the opposite side of the mounting plate (22A); the monomer box (2) has a first direction (X1), and the first direction (X1) points from the mounting plate (22A) to the opening (222); a plurality of monomer boxes (2) are stacked along the first direction (X1), and a through hole (221) is provided on the mounting plate (22A) between the accommodation cavities (21) of every two adjacent monomer boxes (2).

5. The battery box according to claim 4, characterized in that, The mounting plate (22A) has a length direction (L), and the through hole (221) is provided at one end of the mounting plate (22A) along the length direction (L).

6. The battery box according to claim 4, characterized in that, The first direction (X1) is parallel to the thickness direction of the monomer box (2); and / or, the first direction (X1) is the vertically upward direction.

7. The battery box according to claim 4, characterized in that The battery box body (1) further includes a box cover (3); along the first direction (X1), the box cover (3) is connected to the opening (222) of the last monomer box (2) among the plurality of monomer boxes (2).

8. The battery box according to claim 7, characterized in that, A first sealing ring (23) is clamped between two adjacent monomer boxes (2); and / or, a second sealing ring (24) is clamped between the box cover (3) and the monomer box (2).

9. The battery box according to claim 4, characterized in that, Along the first direction (X1), among the plurality of monomer boxes (2), except for the first monomer box (2), through holes (221) are provided on the mounting plates (22A) of the other monomer boxes (2).

10. The battery box according to claim 9, characterized in that, The number of the monomer boxes (2) is greater than or equal to three; the through holes (221) correspond to each other in the first direction (X1).

11. The battery box according to any one of claims 1-10, characterized in that, Among the plurality of monomer boxes (2), a mounting portion (25) for mounting a battery pack control unit (5) is provided on one of the monomer boxes (2); and / or, among the plurality of monomer boxes (2), at least one monomer box (2) is provided with a maintenance window.

12. A battery pack, characterized in that, It includes a battery pack control unit (5) and a battery box body (1) as described in any one of claims 1-11; a battery module (4) is provided in each of the single boxes (2), and the battery modules (4) in each of the single boxes (2) are electrically connected through the channels (2A); the battery pack control unit (5) is arranged on one of the single boxes (2), and the battery pack control unit (5) is electrically connected to the battery modules (4) in each of the single boxes (2).

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