Battery box and power battery pack

Abstract

The utility model provides a battery box and a power battery pack, and belongs to the technical field of batteries. The battery box comprises a box body, a positioning piece arranged on the rear side of the box body and matched with a positioning structure on a whole vehicle battery bracket in a positioning mode, and a connecting structure arranged on the front side of the box body and fixedly connected with a fixing structure on the whole vehicle battery bracket. The box body comprises a main box body provided with a bottom plate and side plates on the periphery, a box cover installed at the top of the main box body and a bottom support fixed to the bottom of the main box body, the positioning piece is arranged at the rear end of the bottom support, and the rear end of the positioning piece protrudes out of a rear side plate in the side plates on the periphery; and the connecting structure is arranged on the front side plate of the peripheral side plates or at the front ends of the left side plate and the right side plate of the peripheral side plates. According to the utility model, the positioning piece is independently arranged on the bottom support, so that the arrangement is convenient, the internal space of the main box body is not occupied, the front-back size of the main box body is not increased, and the installation of the power battery pack can be realized when the front-back installation space of the battery bracket is insufficient.

Description

Technical Field

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

[0002] A power battery pack includes a battery box and battery modules housed within it. When used in vehicles, the power battery pack needs to be mounted on a vehicle battery bracket, therefore the battery box typically has a fixing structure. For example, a battery pack disclosed in Chinese utility model patent CN220341418U includes an upper cover and a main body. Welded brackets are provided on both sides of the bottom of the main body, and the welded brackets have multiple equally spaced mounting holes for fixing the battery box to the vehicle battery bracket with bolts. However, because a large number of bolts are required, and the space on the battery bracket for tightening the bolts is very limited, tools and hands are difficult to maneuver, making the installation operation extremely inconvenient.

[0003] In this regard, Chinese utility model patent CN213816323U discloses a battery pack housing, a battery pack, a ship, and a vehicle. The battery pack housing (i.e., the battery box) includes a main housing and a cover plate. The main housing includes a front panel, a back panel, a bottom plate, and two side panels. The front panel and back panel are arranged opposite each other in the front-to-back direction, and the two side panels are arranged opposite each other in the left-to-right direction. A first positioning member is fixed to the back panel. The first positioning member includes a detachably connected first connecting block and a second connecting block. The first connecting block is welded to the back panel. The second connecting block includes a connecting block body and a protrusion. The connecting block body is fixed to the first connecting block by screws. The protrusion includes a threaded section and a positioning section. The threaded section is threadedly engaged with the connecting block body. A first fixing member is provided on the support plate of the battery mounting bracket. The first fixing member has a positioning hole for the positioning section of the protrusion to be inserted. Second positioning members are fixed to the ends of the two side panels near the front panel. Second fixing members are also provided on the uprights of the battery mounting bracket opposite to the first fixing members. When installing the battery pack, push the battery pack into the battery holder. When it is in place, the positioning section of the protruding post inserts into the positioning hole of the first fixing member to position the battery pack. At the same time, the second positioning member on the battery box mates with the second fixing member on the battery holder. The two are connected by bolts to fix the battery pack.

[0004] During installation, the aforementioned battery pack eliminates the need for multiple bolts on both sides of the battery box; bolts are only required on the front. This reduces the number of bolts and provides ample space for tightening, facilitating battery pack installation and removal. However, because the first positioning component is fixed to the outer surface of the back panel (rear panel) and includes a first connecting block, a second connecting block body, and a protrusion (positioning pin), it has a certain dimension in the front-rear direction. This results in a relatively large front-rear dimension of the battery box, making battery pack installation difficult when the front-rear installation space of the battery bracket is insufficient. Furthermore, due to the thin wall thickness of the back panel, threaded holes cannot be directly machined. If the second connecting block body is placed inside the battery box to reduce the rearward protrusion of the positioning pin, the second connecting block body would still occupy internal space, affecting the arrangement of the battery modules and still resulting in a relatively large front-rear dimension of the battery box. Utility Model Content

[0005] The purpose of this utility model is to provide a battery box to solve the problem that the positioning component of the existing battery box is fixed on the rear side plate of the battery box and the positioning component has a certain size in the front-back direction, resulting in a large size of the battery box in the front-back direction, which in turn makes it difficult to install the battery pack when there is insufficient front-back installation space for the battery bracket; the purpose of this utility model is also to provide a power battery pack to solve the above problems.

[0006] To achieve the above objectives, the battery box in this utility model adopts the following technical solution:

[0007] A battery box includes a box body, a positioning member disposed on the rear side of the box body for positioning and engaging with a positioning structure on a vehicle battery bracket, and a connecting structure disposed on the front side of the box body for fixed connection with a fixing structure on the vehicle battery bracket. The box body includes a main box body having a bottom plate and four side plates, a box cover mounted on the top of the main box body, and a bottom support fixed to the bottom of the main box body. The positioning member is disposed at the rear end of the bottom support, and the rear end of the positioning member protrudes from the rear side plate of the four side plates. The connecting structure is disposed on the front side plate of the four side plates or at the front end of the left and right side plates of the four side plates.

[0008] The beneficial effects of the above technical solution are as follows: This utility model is an improved invention, which further limits the structure of the housing. The housing includes a main housing with a bottom plate and four side plates, a cover installed on the top of the main housing, and a base fixed to the bottom of the main housing. The connecting structure is set on the front side plate of the four side plates or at the front end of the left and right side plates of the four side plates, which facilitates connection with the fixing structure on the vehicle battery bracket to fix the battery box. At the same time, the positioning component is set at the rear end of the base, that is, the positioning component is no longer set on the rear side plate of the main housing, but is set independently on the base. This is convenient to set and does not occupy the internal space of the main housing. The rear end of the positioning component only needs to protrude from the rear side plate of the four side plates to be positioned and cooperate with the positioning structure on the vehicle battery bracket. This method of setting the positioning component by utilizing the height direction will not increase the front and rear dimensions of the main housing, so that the power battery pack can be installed even when the front and rear installation space of the battery bracket is insufficient.

[0009] Furthermore, the base includes a bottom wall and four side walls connected to the bottom wall, with the tops of the four side walls respectively fixed to the bottom plate of the main body.

[0010] Furthermore, the four side walls of the base include a vertical section that is perpendicularly connected to the bottom wall and a connecting section located at the top of the vertical section and perpendicularly connected to the vertical section. The connecting section is fixed to the bottom plate of the main body.

[0011] Furthermore, the connecting sections of the front sidewall, left sidewall, and right sidewall of the four sidewalls extend toward the outer side of the base, while the connecting section of the rear sidewall of the four sidewalls extends toward the inner side of the base.

[0012] Furthermore, the positioning element is a positioning pin, which includes a threaded section and a positioning section. A fixing block is fixed inside the base. The fixing block is attached to the rear side wall of the surrounding side walls. The fixing block has a threaded hole with the opening facing backward. The rear side wall has a through hole for the threaded section of the positioning pin to pass through and connect with the threaded hole on the fixing block.

[0013] Furthermore, a crossbeam is fixed between the left and right side walls of the four sides, with at least two crossbeams spaced apart along the front-to-back direction, and each crossbeam is simultaneously fixed to the bottom wall.

[0014] Furthermore, a longitudinal beam is fixed between the rearmost crossbeam and the rear sidewall among the surrounding sidewalls.

[0015] Furthermore, the foremost crossbeam is simultaneously fixed to the front sidewall among the surrounding sidewalls.

[0016] Furthermore, multiple reinforcing ribs are fixed between the vertical sections and connecting sections of the four side walls.

[0017] To achieve the above objectives, the power battery pack of this utility model adopts the following technical solution:

[0018] A power battery pack includes a battery box and battery modules disposed within the battery box. The battery box includes a box body, a positioning member disposed on the rear side of the box body for positioning and engaging with a positioning structure on a vehicle battery bracket, and a connecting structure disposed on the front side of the box body for fixed connection with a fixing structure on the vehicle battery bracket. The box body includes a main box body having a bottom plate and four side plates, a box cover mounted on the top of the main box body, and a bottom support fixed to the bottom of the main box body. The positioning member is disposed at the rear end of the bottom support, and the rear end of the positioning member protrudes from the rear side plate of the four side plates. The connecting structure is disposed on the front side plate of the four side plates or at the front end of the left and right side plates of the four side plates.

[0019] The beneficial effects of the above technical solution are as follows: This utility model is an improved invention, which further limits the structure of the housing. The housing includes a main housing with a bottom plate and four side plates, a cover installed on the top of the main housing, and a base fixed to the bottom of the main housing. The connecting structure is set on the front side plate of the four side plates or at the front end of the left and right side plates of the four side plates, which facilitates connection with the fixing structure on the vehicle battery bracket to fix the battery box. At the same time, the positioning component is set at the rear end of the base, that is, the positioning component is no longer set on the rear side plate of the main housing, but is set independently on the base. This is convenient to set and does not occupy the internal space of the main housing. The rear end of the positioning component only needs to protrude from the rear side plate of the four side plates to be positioned and cooperate with the positioning structure on the vehicle battery bracket. This method of setting the positioning component by utilizing the height direction will not increase the front and rear dimensions of the main housing, so that the power battery pack can be installed even when the front and rear installation space of the battery bracket is insufficient.

[0020] Furthermore, the base includes a bottom wall and four side walls connected to the bottom wall, with the tops of the four side walls respectively fixed to the bottom plate of the main body.

[0021] Furthermore, the four side walls of the base include a vertical section that is perpendicularly connected to the bottom wall and a connecting section located at the top of the vertical section and perpendicularly connected to the vertical section. The connecting section is fixed to the bottom plate of the main body.

[0022] Furthermore, the connecting sections of the front sidewall, left sidewall, and right sidewall of the four sidewalls extend toward the outer side of the base, while the connecting section of the rear sidewall of the four sidewalls extends toward the inner side of the base.

[0023] Furthermore, the positioning element is a positioning pin, which includes a threaded section and a positioning section. A fixing block is fixed inside the base. The fixing block is attached to the rear side wall of the surrounding side walls. The fixing block has a threaded hole with the opening facing backward. The rear side wall has a through hole for the threaded section of the positioning pin to pass through and connect with the threaded hole on the fixing block.

[0024] Furthermore, a crossbeam is fixed between the left and right side walls of the four sides, with at least two crossbeams spaced apart along the front-to-back direction, and each crossbeam is simultaneously fixed to the bottom wall.

[0025] Furthermore, a longitudinal beam is fixed between the rearmost crossbeam and the rear sidewall among the surrounding sidewalls.

[0026] Furthermore, the foremost crossbeam is simultaneously fixed to the front sidewall among the surrounding sidewalls.

[0027] Furthermore, multiple reinforcing ribs are fixed between the vertical sections and connecting sections of the four side walls. Attached Figure Description

[0028] Figure 1 This is a perspective view of an embodiment of the power battery pack of this utility model;

[0029] Figure 2 This is a perspective view of another embodiment of the power battery pack of this utility model;

[0030] Figure 3 This is a side view of an embodiment of the power battery pack of this utility model;

[0031] Figure 4 This is a perspective view of the base support in an embodiment of the power battery pack of this utility model;

[0032] Figure 5 This is a perspective view of the base support in an embodiment of the power battery pack of this utility model.

[0033] Figure 6 This is a cross-sectional view of the bottom support in an embodiment of the power battery pack of this utility model;

[0034] Figure 7 A perspective view of the vehicle battery bracket used in conjunction with the power battery pack of this utility model;

[0035] Figure 8 This is a perspective view of the vehicle battery bracket used in conjunction with the power battery pack of this utility model.

[0036] In the diagram: 1. Main body; 11. Front side panel; 111. Press-fit nut; 12. Rear side panel; 13. Left side panel; 14. Right side panel; 15. Front handle; 16. Rear handle; 2. Cover; 3. Base support; 31. Front side wall; 32. Rear side wall; 33. Left side wall; 34. Right side wall; 35. Positioning pin; 36. Reinforcing rib; 37. Fixing block; 38. First crossbeam; 39. Second crossbeam; 310. Bottom wall; 311. Longitudinal beam; 4. Vehicle battery bracket; 41. Front baffle; 411. Mounting hole; 42. Rear baffle; 421. Positioning hole; 43. Left baffle; 44. Right baffle; 45. Support plate. Detailed Implementation

[0037] To address the technical problems existing in the prior art, the basic concept of this utility model is to configure the battery box as including a main box body and a base, and to set the positioning component on the base. This does not increase the size of the main box body in the front-to-back direction, but utilizes the layout in the height direction to realize the setting of the positioning component, so that the battery pack can be used in scenarios where there is insufficient installation space in front and behind the battery bracket.

[0038] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0039] Embodiment 1 of the power battery pack in this utility model:

[0040] The power battery pack includes a battery box and battery modules installed inside the battery box. The battery box includes a box body, a positioning component located on the rear side of the box body for positioning and engaging with a positioning structure on the vehicle battery bracket, and a connecting structure located on the front side of the box body for fixed connection with a fixing structure on the vehicle battery bracket. The positioning component is used to position the battery box during battery pack installation, and the connecting structure is used to fix the battery box to the vehicle battery bracket, ensuring that the battery pack is installed stably.

[0041] Specifically in this embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, the box includes a main box 1 with a bottom plate and four side plates, a box cover 2 installed on the top of the main box 1, and a bottom support 3 fixed to the bottom of the main box 1. The four side plates of the main box 1 are a front side plate 11, a rear side plate 12, a left side plate 13, and a right side plate 14. The above connection structure consists of three press nuts 111 fixed on the front side plate 11. The press nuts 111 have threaded holes with the opening facing forward.

[0042] The four side panels of the main housing 1 are fixedly connected to the bottom plate, forming a hollow housing structure with the opening facing upwards. The battery module is installed inside the main housing 1. The cover 2 is fixed to the main housing 1 with screws to seal the top opening of the main housing 1. A front handle 15 is installed on the front side panel 11 of the main housing 1, and a rear handle 16 is installed on the rear side panel 12 to facilitate the movement of the power battery pack. Furthermore, the rear side panel 12 has a recessed structure, and the rear handle 16 is installed in the recessed structure and does not protrude from the outer surface of the rear side panel 12.

[0043] like Figures 1-3 and combined Figure 4 , Figure 5 and Figure 6 As shown, the base 3 includes a bottom wall 310 and four side walls connected to the bottom wall 310. The four side walls are a front side wall 31, a rear side wall 32, a left side wall 33, and a right side wall 34. The tops of the four side walls are fixed to the bottom plate of the main box 1 by welding. The entire base 3 is a box structure. After being fixed to the bottom of the main box 1, it can improve the overall structural strength of the box without excessively increasing the weight of the box.

[0044] In this embodiment, the bottom wall 310 and the surrounding side walls of the base support 3 are formed by bending sheet metal. Each of the surrounding side walls includes a vertical section that is perpendicularly connected to the bottom wall 310 and a connecting section located at the top of the vertical section and perpendicularly connected to the vertical section. The connecting section is welded and fixed to the bottom plate of the main box 1 as a flange. This can increase the contact area between the base support 3 and the bottom plate, facilitate welding and fixing, and ensure the fixing effect between the base support 3 and the main box 1.

[0045] Furthermore, the connecting sections of the front sidewall 31, left sidewall 33, and right sidewall 34 of the four sidewalls extend outward toward the base 3, but the connecting section of the front sidewall 31 does not protrude from the front panel 11 of the main body 1, the connecting section of the left sidewall 33 does not protrude from the left side panel 13 of the main body 1, and the connecting section of the right sidewall 34 does not protrude from the right side panel 14 of the main body 1. At the same time, the connecting section of the rear sidewall 32 of the four sidewalls extends inward toward the base 3, so as to avoid the installation of the base 3 causing an increase in the width and length of the main body 1.

[0046] The above positioning member is a positioning pin 35. There are two positioning pins 35. Each positioning pin 35 includes a threaded section and a positioning section, and the positioning section is conical. Two fixing blocks 37 are fixed inside the bottom bracket 3. The fixing blocks 37 are attached to the inner surface of the rear side wall 32 among the surrounding side walls, and the fixing blocks 37 are welded and fixed to the rear side wall 32. The fixing blocks 37 are provided with threaded holes with the hole openings facing backward. The rear side wall 32 is provided with through holes for the threaded sections of the positioning pins 35 to pass through and cooperate with the threaded holes on the fixing blocks 37, so as to facilitate the installation of the positioning pins 35. At the same time, the connecting section of the rear side wall 32 extends towards the inside of the bottom bracket 3, which is also for the convenience of installing the positioning pins 35. After the positioning pins 35 are installed, the positioning sections are located at the rear side of the rear side wall 32, and as Figure 3 shown, the rear ends of the positioning pins 35 protrude from the rear side plate 12 of the main box body 1, which is convenient for positioning and cooperation with the positioning structure on the vehicle battery bracket.

[0047] In addition, a cross beam is fixed between the left side wall 33 and the right side wall 34 among the surrounding side walls. At least two cross beams are arranged at intervals in the front-rear direction, and each cross beam is fixed to the bottom wall 310 at the same time, thereby improving the anti-deformation ability of the left side wall 33 and the right side wall 34 and the structural strength of the bottom bracket 3. Specifically combined with Figures 4-6 shown, there are four cross beams in total. Among them, three cross beams have a certain distance from both the front side wall 31 and the rear side wall 32, which are the first cross beams 38. The remaining one cross beam is the second cross beam 39, and the second cross beam 39 is also the frontmost cross beam. The second cross beam 39 is fixed to the front side wall 31 at the same time, which improves the anti-deformation ability of the front side wall 31. And the second cross beam 39 is in a "W" shape, which is convenient for the flanges at both ends to be respectively attached to and welded and fixed to the front side wall 31 and the bottom wall 310. Each first cross beam 38 is in a "U" shape, which is convenient for the flanges at both ends to be respectively attached to and welded and fixed to the bottom wall 310.

[0048] In addition, a longitudinal beam 311 is fixed between the rearmost cross beam, that is, the first cross beam 38 closest to the rear side wall 32, and the rear side wall 32, which improves the anti-deformation ability of the rear side wall 32. The longitudinal beam 311 is also in a "U" shape, which is convenient for the flanges at both ends to be respectively attached to and welded and fixed to the bottom wall 310.

[0049] In addition, a plurality of reinforcing ribs 36 are welded and fixed between the vertical sections and the connecting sections of the surrounding side walls, which improves the structural strength of each side wall and can improve the structural strength of the bottom bracket 3 as a whole from the overall perspective.

[0050] As Figure 7 and <> Figure 8The diagram shows the structure of the vehicle battery bracket used in conjunction with the power battery pack of this embodiment. The vehicle battery bracket 4 includes a support plate 45 and front baffles 41, rear baffles 42, left baffles 43, and right baffles 44 disposed before, after, to the left and right of the support plate 45. The rear baffles 42, left baffles 43, and right baffles 44 are fixedly connected to the support plate 45. The distance between the left baffles 43 and right baffles 44 is adapted to the width of the power battery pack. The front baffles 41 are hinged to the front end of the support plate 45 and can be flipped up and down. The front baffles 41 have three mounting holes 411 for screws to pass through, and the rear baffles 42 have two positioning holes 421.

[0051] During installation, the front baffle 41 of this utility model is in a downward position, facilitating the placement of the end of the power battery pack on the support plate 45. The power battery pack is then pushed backward until the positioning pin 35 is inserted into the positioning hole 421 of the rear baffle 42. Since the positioning section of the positioning pin 35 is conical, when the power battery pack cannot be pushed further, the positioning pin 35 is pressed against the positioning hole 421, thus positioning the power battery pack. Then, the front baffle 41 is flipped upward, aligning the mounting hole 411 on the front baffle 41 with the rivet nut 111 on the front side plate 11 of the main housing. Screws are then installed to securely connect the front side plate 11 to the front baffle 41, thus fixing the power battery pack. To disassemble the power battery pack, first remove the screws between the front side plate 11 and the front baffle 41, then flip the front baffle 41 downward and pull the front handle 15 to remove the power battery pack.

[0052] In summary, compared with the prior art, the positioning pin 35 of the power battery pack of this utility model is no longer set on the rear side plate 12 of the main body 1, but is set independently on the bottom support 3. This is convenient for installation and does not occupy the internal space of the main body 1. The rear end of the positioning pin 35 only needs to protrude from the rear side plate 12 of the main body 1 to be positioned and cooperate with the positioning hole 421 on the vehicle battery bracket 4. This method of setting the positioning pin 35 by utilizing the height direction will not increase the front and rear dimensions of the main body 1. Therefore, when the front and rear installation space of the vehicle battery bracket 4 is insufficient, the power battery pack can still be installed.

[0053] In other embodiments of the power battery pack: the vertical sections and connecting sections of the sidewalls around the base may no longer need to be fixed with reinforcing ribs, but the bending strength between the vertical sections and connecting sections can be used to ensure the structural strength of the sidewalls.

[0054] In other embodiments of the power battery pack: the frontmost crossbeam and the front sidewall of the base can be spaced apart, that is, the frontmost crossbeam is no longer fixed to the front sidewall.

[0055] In other embodiments of the power battery pack: the longitudinal beam is no longer fixed between the rearmost crossbeam and the rear side wall of the base, and the base relies solely on multiple crossbeams to ensure structural strength.

[0056] In other embodiments of the power battery pack, the number of crossbeams can be four or more, or of course only two.

[0057] In other embodiments of the power battery pack: the crossbeam may no longer be fixed between the left and right walls of the base. In this case, the structural strength of the base is guaranteed only by the bending strength between the bottom wall and the surrounding side walls. Of course, in other embodiments, the bottom wall and the surrounding side walls may not be bent into shape, but may be separate, with the surrounding side walls welded and fixed separately to the edge of the bottom wall.

[0058] In other embodiments of the power battery pack: the positioning pin can be directly welded and fixed to the outer side of the rear side wall of the base, thereby eliminating the need for a fixing block, and the positioning pin does not need to be provided with a threaded section.

[0059] In other embodiments of the power battery pack: when the positioning pin includes a threaded section and the positioning pin is detachable, a fixing block can also be welded to the outer side of the rear sidewall of the base, and a threaded hole is provided on the fixing block, and the threaded section of the positioning pin is engaged with the threaded hole on the fixing block.

[0060] In other embodiments of the power battery pack: the connecting section of the rear side wall of the base can also extend outward toward the outside of the base, and in this case, the connecting section of the side wall of the base can also be fixed to the bottom plate of the main body with screws.

[0061] In other embodiments of the power battery pack: the four sides of the base can be vertical side walls, no longer including the connecting section, and the top of the four sides of the base can be directly welded and fixed to the bottom plate of the main body.

[0062] In other embodiments of the power battery pack: the base can be a solid plate instead of a box structure including the bottom wall and the four side walls. In this case, threaded holes can be directly machined on the rear end face of the base to realize the installation of the positioning pin, or the positioning pin can be directly welded and fixed to the rear end face of the base.

[0063] In other embodiments of the power battery pack: the press-fit nuts on the front side panel of the main housing can be replaced with welded nuts, or if the wall thickness of the front side panel allows, threaded holes can be directly machined on the front side panel as a connection structure.

[0064] In other embodiments of the power battery pack: the connecting structure on the main housing may not be set on the front side panel, but on the front end of the left and right side panels. In this case, the connecting structure is an L-shaped connecting plate. One side of the connecting plate is welded and fixed to the side panel of the main housing, and the other side is provided with mounting holes. Of course, the structure of the vehicle battery bracket is also different from that in Embodiment 1, but is the same as that in patent CN213816323U. That is, the fixing structure of the vehicle battery bracket is a fixing plate. When the power battery pack is installed in place, the connecting plate on the main housing fits into the fixing plate. The fixing plate is provided with corresponding mounting holes so that the fixing plate and the connecting plate can be fixedly connected by bolts, thereby realizing the fixing of the power battery pack.

[0065] In other embodiments of the power battery pack: the positioning component may not be a positioning pin. For example, the positioning component is a positioning block, which is fixed on the rear end face of the base. The positioning block is provided with positioning holes. In this case, the positioning structure on the vehicle battery bracket is a positioning pin. When the power battery pack is installed in place, the positioning pin on the vehicle battery bracket is inserted into the positioning hole on the main housing positioning block to achieve the positioning of the power battery pack.

[0066] The embodiment of the battery box in this utility model is as follows: the specific structure of the battery box is the same as that of the battery box in any of the above-mentioned power battery pack embodiments, and will not be repeated here.

[0067] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A battery box, comprising a box body, a positioning member disposed on the rear side of the box body for positioning and engaging with a positioning structure on a vehicle battery bracket, and a connecting structure disposed on the front side of the box body for fixed connection with a fixing structure on the vehicle battery bracket, characterized in that, The enclosure includes a main enclosure with a bottom plate and four side plates, a cover installed on the top of the main enclosure, and a base fixed to the bottom of the main enclosure. The positioning element is located at the rear end of the base and the rear end of the positioning element protrudes from the rear side plate of the four side plates. The connecting structure is located on the front side plate of the four side plates or at the front end of the left and right side plates of the four side plates.

2. The battery box according to claim 1, characterized in that, The base includes a bottom wall and four side walls connected to the bottom wall. The tops of the four side walls are fixed to the bottom plate of the main body.

3. The battery box according to claim 2, characterized in that, The four sides of the base include a vertical section that is perpendicularly connected to the base wall and a connecting section located at the top of the vertical section and perpendicularly connected to the vertical section. The connecting section is fixed to the bottom plate of the main body.

4. The battery box according to claim 3, characterized in that, The connecting sections of the front, left, and right side walls extend outward toward the base, while the connecting section of the rear side wall extends inward toward the base.

5. The battery box according to any one of claims 2 to 4, characterized in that, The positioning component is a positioning pin, which includes a threaded section and a positioning section. A fixing block is fixed inside the base. The fixing block is attached to the rear side wall of the surrounding side walls. The fixing block has a threaded hole with the opening facing backward. The rear side wall has a through hole for the threaded section of the positioning pin to pass through and connect with the threaded hole on the fixing block.

6. The battery box according to any one of claims 2 to 4, characterized in that, A crossbeam is fixed between the left and right side walls of the four sides. At least two crossbeams are spaced apart along the front-to-back direction, and each crossbeam is fixed to the bottom wall.

7. The battery box according to claim 6, characterized in that, The final crossbeam is fixed to the rear side wall among the four side walls by a longitudinal beam.

8. The battery box according to claim 6, characterized in that, The foremost crossbeam is simultaneously fixed to the front sidewall among the four sidewalls.

9. The battery box according to claim 3 or 4, characterized in that, Multiple reinforcing ribs are fixed between the vertical sections and connecting sections of the four side walls.

10. A power battery pack, comprising a battery box and battery modules disposed within the battery box, characterized in that, The battery box is the battery box as described in any one of claims 1 to 9.

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