Battery pack structure

Abstract

The utility model provides a battery pack structure which comprises a shell, and the shell is provided with a first cavity for mounting a battery module and a second cavity arranged on one side of the first cavity along a first direction; the BDU is arranged in the second cavity, and the BMS is arranged on the outer side of the second cavity and connected with the bottom plate of the shell. According to the battery pack structure provided by the utility model, the BMS is arranged on the bottom surface outside the shell, so that when the BMS needs to be maintained, the battery pack structure does not need to be disassembled, the BMS arranged outside the shell can be directly maintained, the overall maintenance operation is simplified, time and labor are saved, and the maintenance efficiency is improved. According to the external BMS, the problem that in the prior art, operation is complex due to the fact that the BMS in the battery pack structure needs to be maintained after the battery pack is disassembled is solved through the structural arrangement that the BMS is externally arranged on the shell.

Description

Technical Field

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

[0002] The Battery Management System (BMS) and Battery Distribution Unit (BDU) are crucial components of the battery system in new energy electric vehicles. Within the battery system, the BMS and BDU work together. The BMS monitors battery status and issues control commands, while the BDU distributes and controls power accordingly, ensuring stable and safe operation of the entire battery system. The BMS also undergoes rigorous testing to ensure its quality and integrity, including simulating battery behavior and testing its response under various conditions.

[0003] The current traditional BMS maintenance design usually requires the battery pack to be disassembled during maintenance, and the battery pack cover must be opened to repair the BMS inside the battery pack. However, disassembling the battery pack is complicated, especially when the battery pack is installed on the vehicle body. Since the battery pack itself is relatively bulky, this method of disassembling the battery pack to repair the BMS is complicated, time-consuming and labor-intensive.

[0004] As can be seen from the above, the current battery pack has the problem of inconvenient operation due to the need to disassemble the battery pack when repairing the BMS. Utility Model Content

[0005] The main purpose of the utility model is to provide a battery pack structure to solve the problem in the prior art that the battery pack needs to be disassembled when the BMS is repaired, which causes inconvenience in operation.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a battery pack structure is provided, which includes a shell, the shell having a first cavity for installing a battery module, and a second cavity arranged on one side of the first cavity along a first direction; a BMS and a BDU, the BDU is arranged inside the second cavity, and the BMS is arranged outside the second cavity and connected to the bottom plate of the shell.

[0007] Furthermore, the bottom plate of the second cavity is a mounting plate, and the BDU and the BMS are respectively arranged on two opposite sides of the mounting plate along the height direction of the housing.

[0008] Furthermore, the first direction is the length direction of the housing; and / or the mounting plate has a mounting hole, and the BMS is locked with the mounting hole through a fastener.

[0009] Furthermore, a reinforcement beam is provided on the top surface of the mounting plate, and the BDU is provided on the reinforcement beam.

[0010] Furthermore, the reinforcing beam is welded to the mounting plate; and / or the reinforcing beam extends along a second direction perpendicular to the first direction; and / or a plurality of reinforcing beams are provided, and the plurality of reinforcing beams are spaced apart along the first direction.

[0011] Furthermore, a mounting channel extending along the height direction of the shell is provided on the mounting plate, and the battery pack structure also includes a connector, which is plugged into the inside of the mounting channel; a wiring harness, wherein one end of the connector exposed outside the shell is connected to the BMS through the wiring harness, and the other end of the connector located inside the shell is used to connect to the battery module.

[0012] Furthermore, the battery pack structure further includes a seal, at least a portion of which is disposed between the mounting channel and the connector.

[0013] Furthermore, the mounting plate has an inner raised bent portion facing the second cavity, and a mounting groove is formed on the bent portion along the height direction of the shell with an opening facing away from the BDU, and the BMS and wiring harness are arranged inside the mounting groove.

[0014] Furthermore, the battery pack structure also includes a protective plate, which is detachably arranged on the outside of the first cavity and connected to the bottom surface of the outer shell; a maintenance plate, which is detachably connected to the mounting plate, the maintenance plate blocks the notch of the mounting slot, and the maintenance plate is coplanar with the bottom surface facing away from the protective plate.

[0015] Furthermore, the battery pack structure also includes a sealing strip, which is arranged between the maintenance plate and the mounting plate; and / or the sealing strip is arranged between the protective plate and the outer shell.

[0016] Furthermore, the shell includes an outer frame; a back plate and a mounting plate, the back plate and the mounting plate are arranged at the bottom opening of the outer frame, the back plate is used to support the battery module, and the BMS and BDU are arranged on the mounting plate; and a cover plate, the cover plate is arranged at the top opening of the outer frame.

[0017] Furthermore, the mounting plate is fixed to the outer frame by welding; and / or the outer frame has a wiring hole connected to the second cavity.

[0018] Furthermore, the shell also includes a partition connected to the outer frame, which is arranged between the mounting plate and the back plate along the first direction, and extends toward one side of the cover plate. The partition divides the inner cavity of the shell into a first cavity and a second cavity arranged on both sides of the partition along the first direction.

[0019] By applying the technical solution of the present invention, the battery pack structure of the present application adopts the method of setting the BMS on the bottom surface of the exterior of the housing. This allows the BMS to be repaired directly on the exterior of the housing without having to disassemble the battery pack structure, thus simplifying the overall repair operation, saving time and effort, and improving repair efficiency. The external BMS structure of the present application is externally mounted on the housing, avoiding the problem of complicated operation caused by the need to disassemble the battery pack in the prior art to repair the BMS inside the battery pack structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of a three-dimensional structure of a battery pack structure of the present invention is shown;

[0022] Figure 2 Another schematic diagram of the three-dimensional structure of the battery pack structure of the present invention is shown;

[0023] Figure 3 A schematic diagram of the three-dimensional structure of the battery pack structure of the present invention without a cover plate is shown;

[0024] Figure 4 Shown Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 A schematic structural diagram showing the first cavity and the second cavity of the battery pack structure of the present invention is shown;

[0026] Figure 6 Shown Figure 5 Enlarged view of point B in FIG.

[0027] Figure 7 It shows a schematic diagram of the three-dimensional structure of the BMS installed on the mounting plate of the utility model;

[0028] Figure 8 Shown Figure 7 Enlarged view of point C in the figure;

[0029] Figure 9 Shows a schematic diagram of the installation structure of the mounting plate of the utility model;

[0030] Figure 10 Shown Figure 9 The enlarged view of point D in the figure;

[0031] Figure 11A schematic diagram of the matching structure of the connector and the sealing member of the present invention is shown.

[0032] The above drawings include the following reference numerals:

[0033] 10. Housing; 101. First cavity; 102. Second cavity; 103. Mounting slot; 104. Wiring hole; 110. Outer frame; 120. Cover plate; 130. Mounting plate; 131. Mounting channel; 140. Partition plate; 150. Back plate; 20. BMS; 30. BDU; 40. Connector; 50. Guard plate; 60. Maintenance panel; 70. Reinforcement beam; 80. Wiring harness; 90. Seal. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0036] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings, or with reference to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0037] In order to solve the problem in the prior art that the battery pack needs to be disassembled when the BMS is repaired, which causes inconvenience in operation, the present application provides a battery pack structure.

[0038] The battery pack structure in this embodiment includes a shell 10, a battery module, a battery management system, namely BMS20, and a battery pack disconnect unit, namely BDU30. The battery pack structure works in coordination with BMS20 and BDU30. BMS20 monitors the battery status and issues control instructions, while BDU30 reasonably distributes and controls power according to these instructions to ensure the stable and safe operation of the entire battery system.

[0039] In this embodiment, the battery pack structure can be installed on the vehicle body to provide power for the vehicle body as an electric power source.

[0040] like Figures 1 to 11As shown, the battery pack structure includes a shell 10, a BMS20 and a BDU30. The shell 10 has a first cavity 101 for installing a battery module, and a second cavity 102 arranged on one side of the first cavity 101 along a first direction. The BDU30 is arranged inside the second cavity 102, and the BMS20 is arranged outside the second cavity 102 and connected to the bottom plate of the shell 10.

[0041] Among them, the battery module, BMS20 and BDU30 are arranged inside the same housing 10, and BMS20 and BDU30 are both connected to the battery module to facilitate BMS20 and BDU30 to monitor the battery module and control the stable and safe operation of the battery module.

[0042] In this embodiment, the housing 10 is a metal shell to protect the battery module, BMS 20 and BDU 30 inside the housing 10 , and is also convenient for installation at a desired installation location, such as on a vehicle body.

[0043] Specifically, the interior of the housing 10 is divided into two cavities arranged along a first direction for installing a battery module and a BDU30 connected to the battery module, respectively. The two cavities are used to partition the battery module and the BDU30 to facilitate subsequent maintenance and improve safety of use.

[0044] In this embodiment, the battery pack structure adopts a structure in which the BMS 20 is arranged on the bottom surface of the outside of the housing 10, so that when the BMS 20 needs to be repaired, there is no need to disassemble the battery pack structure. The BMS 20 arranged outside the housing 10 can be repaired directly, which simplifies the overall maintenance operation, saves time and effort, and improves maintenance efficiency. The structural arrangement of the external BMS 20 of the present application is external to the housing 10, which avoids the problem of complicated operation caused by the need to disassemble the battery pack in the prior art to repair the BMS 20 inside the battery pack structure.

[0045] The first direction is as follows Figure 1 1 , the second direction is the length direction of the housing 10 as shown in FIG. 1 , the second direction is the width direction of the housing 10 as shown in FIG. 1 , and the third direction is the height direction of the housing 10 as shown in FIG. 1 .

[0046] like Figures 3 to 6 As shown, the bottom plate of the second cavity 102 is a mounting plate 130 , and the BDU 30 and the BMS 20 are respectively arranged on two opposite sides of the mounting plate 130 along the height direction of the housing 10 .

[0047] Specifically, BMS20 is set on the lower side of BDU30, so that the structure with control function is set on the same side of the battery module, which facilitates the layout of the overall structure and is beneficial to improving the structural layout of the battery pack structure. At the same time, setting BMS20 on one side of the battery module is also beneficial to improving safety of use.

[0048] In this embodiment, the BMS 20 is detachably mounted on the mounting plate 130. Specifically, the mounting plate 130 has a mounting hole, and the BMS 20 has a through hole. The fastener passes through the through hole on the BMS 20 and extends into the interior of the mounting hole to compress, clamp, and fix the BMS 20. The BMS 20 is detachably fixed to the mounting plate 130 by the fastener and the mounting hole. The mounting hole is a threaded hole, and the fastener is a screw. The screw and the threaded hole are threaded together to fix the BMS 20.

[0049] In this embodiment, the BMS 20 includes at least a main board and a slave board. Both the main board and the slave board are mounted on the mounting plate 130 , and both the main board and the slave board are connected to the connector 40 via a wire harness 80 .

[0050] Furthermore, a plurality of mounting holes are provided, and the plurality of mounting holes are provided in cooperation with the through holes on the BMS 20 to improve the stability of the connection between the BMS 20 and the mounting plate 130 .

[0051] like Figures 3 to 6 As shown, a reinforcing beam 70 is provided on the top surface of the mounting plate 130, and the BDU 30 is provided on the reinforcing beam 70. By providing the reinforcing beam 70 on the mounting plate 130, it is not only used for the installation of the BDU 30, but also helps to improve the installation strength and improve the stability of the battery pack structure.

[0052] The reinforcing beam 70 is disposed inside the second cavity 102 and extends along the second direction to increase the strength of the mounting plate 130 in the second direction and prevent deformation of the bottom of the second cavity 102 in the second direction.

[0053] In order to further improve the strength of the mounting plate 130 and the stability of the BDU 30 installation, multiple reinforcement beams 70 are arranged at intervals along the first direction. The multiple reinforcement beams 70 are fixed between the BDU 30 and the mounting plate 130 to provide multiple installation positions, thereby improving the stability of the BDU 30 installation.

[0054] In this embodiment, the reinforcing beam 70 is fixed to the mounting plate 130 by welding. The reinforcing beam 70 is fixed to the reinforcing plate by welding, which is convenient for operation and is beneficial to the stability of the fixing of the reinforcing beam 70 .

[0055] Preferably, the reinforcing beam 70 and the mounting plate 130 are fixed by friction welding.

[0056] like Figure 9 and Figure 10 As shown, a mounting channel 131 extending along the height direction of the housing 10 is provided on the mounting plate 130 , and the mounting channel 131 provides a mounting space.

[0057] Specifically, the battery pack structure also includes a connector 40 and a wiring harness 80. The connector 40 is inserted into the inside of the mounting channel 131. The end of the connector 40 exposed outside the outer shell 10 is connected to the BMS20 through the wiring harness 80, and the other end of the connector 40 located inside the outer shell 10 is used to connect to the battery module.

[0058] In this embodiment, along the height direction of the shell 10, one end of the connector 40 is exposed outside the shell 10, and the other end of the connector 40 is located inside the second cavity 102. The connector 40 is upright inside the mounting channel 131. The connector 40 is electrically connected to the BMS 20 through the wiring harness 80, and the other end of the connector 40, i.e., the end located inside the second cavity 102, is electrically connected to the battery module.

[0059] like Figure 11 As shown, the battery pack structure further includes a seal 90 , at least a portion of which is disposed between the mounting channel 131 and the connector 40 .

[0060] Specifically, the seal 90 is provided to seal the gap between the installation channel 131 and the connection, thereby achieving a waterproof and dustproof effect to prevent water and dust from entering the interior of the housing 10 through the installation channel 131.

[0061] Furthermore, the sealing member 90 is a plastic strip, which is connected to the mounting plate 130 , and the connector is fixedly connected to the mounting plate 130 via fasteners. The sealing strip not only achieves a sealing effect but also has the function of limiting and fixing the connector 40 .

[0062] In this embodiment, the mounting plate 130 has an inner raised bent portion facing the second cavity 102, and a mounting groove 103 is formed on the bent portion along the height direction of the shell 10, with an opening facing the side away from the BDU 30, and the BMS 20 and the wiring harness 80 are arranged inside the mounting groove 103.

[0063] like Figures 7 to 10 As shown, the mounting plate 130 forms a mounting groove 103, and the BMS20 and the wiring harness 80 are arranged inside the mounting groove 103, so that the BMS20 and the wiring harness 80 are built into the mounting groove 103 to play a protective role, avoiding the BMS20 and the wiring harness 80 protruding from the mounting groove 103 so as to avoid the problem that the BMS20 and the wiring harness 80 are easily damaged by collision.

[0064] Specifically, the battery pack structure also includes a maintenance plate 60, which is detachably connected to the mounting plate 130 and blocks the notch of the mounting slot 103. The maintenance plate 60 is disposed at the notch of the mounting slot 103 to protect the BMS 20 within the mounting slot 103. When the BMS 20 needs to be repaired, the maintenance plate 60 only needs to be removed to expose the BMS 20, making the operation convenient and simple, saving time and effort and improving maintenance efficiency.

[0065] Furthermore, the battery pack structure also includes a protective plate 50, which is detachably arranged outside the first cavity 101 and connected to the bottom surface of the shell 10. The maintenance plate 60 is coplanar with the bottom surface facing away from the protective plate 50.

[0066] In this embodiment, the protective plate 50 is provided to protect the bottom of the housing 10, preventing damage to the housing 10 from impact or other external forces, which could affect the installation and use of components within the housing 10, such as the battery module. The protective plate 50 is coplanar with the maintenance plate 60, which facilitates installation and improves the overall aesthetics. The coplanar structure of the protective plate 50 and the maintenance plate 60 prevents the bottom of the housing 10 from being easily damaged by uneven surfaces.

[0067] In this embodiment, the battery pack structure also includes a sealing strip, which is arranged between the maintenance plate 60 and the mounting plate 130. By arranging the sealing strip between the maintenance plate 60 and the mounting plate 130, when the maintenance plate 60 is installed on the mounting plate 130, the maintenance plate 60 and the mounting plate 130 are sealed by the sealing strip. The setting of the sealing strip can prevent water and dust from entering the interior of the mounting groove 103, and is beneficial to improving the stability of the installation of the maintenance plate 60; at the same time, the sealing strip is arranged between the guard plate 50 and the outer shell 10. By arranging the sealing strip between the guard plate 50 and the mounting plate 130, a sealed connection between the guard plate 50 and the outer shell 10 is achieved, which is beneficial to improving the stability of the installation of the guard plate 50.

[0068] Specifically, the maintenance plate 60 and the sealing strip are connected to the mounting plate 130 by means of bolts and other structural parts, that is, the bolts and other structural parts pass through the maintenance plate 60 and the sealing strip and are connected to the mounting plate 130, so that the BMS20 can be easily disassembled when maintenance is required, and can be easily installed after maintenance is completed, which is beneficial to improving the efficiency of maintenance operations; similarly, the guard plate 50 and the sealing strip are connected to the outer shell 10 by means of bolts and other structural parts, that is, the bolts and other structural parts pass through the guard plate 50 and the sealing strip and are connected to the outer shell 10, so that the BMS20 can be easily disassembled when needed.

[0069] The maintenance plate 60 of the present application is arranged corresponding to the mounting plate 130 , so that when the BMS 20 needs to be repaired, only the maintenance plate 60 needs to be removed to repair the BMS 20 .

[0070] like Figures 1 to 11 As shown, the housing 10 in this embodiment includes an outer frame 110, a back plate 150, a mounting plate 130 and a cover plate 120. The back plate 150 and the mounting plate 130 are arranged at the bottom opening of the outer frame 110. The back plate 150 is used to support the battery module. The BMS20 and BDU30 are arranged on the mounting plate 130. The cover plate 120 is arranged at the top opening of the outer frame 110.

[0071] Specifically, the outer frame 110 is surrounded by frames connected end to end in sequence, and the back plate 150 is welded and fixed to the bottom opening of the outer frame 110 to support the battery module and realize the installation of the battery module, thereby increasing the installation space of the battery module; at the same time, the BMS20 and BDU30 are installed on the mounting plate 130 to facilitate the maintenance of the BMS20 at the bottom.

[0072] Furthermore, the cover plate 120 is covered at the top opening of the outer frame 110 to achieve the purpose of shielding the battery module and BDU30 with one cover plate 120 , and the cover plate 120 , the outer frame 110 , the back plate 150 and the mounting plate 130 cooperate with the inner cavity of the siege shell 10 .

[0073] Among them, in order to ensure the sealing of the area where the cover plate 120 is covered, this embodiment also provides a sealing ring between the cover plate 120 and the top surface of the outer frame 110. The setting of the sealing ring is conducive to achieving a waterproof and dustproof effect in the contact area between the cover plate 120 and the outer frame 110, and at the same time can also enhance the stability of the installation of the cover plate 120.

[0074] In this embodiment, the cover plate 120 is connected to the outer frame 110 by bolts to achieve a detachable connection effect.

[0075] In this embodiment, preferably, the back plate 150 and the outer frame 110 , as well as the mounting plate 130 and the outer frame 110 are all friction welded.

[0076] In this embodiment, to facilitate wiring, the outer frame 110 has a wiring hole 104 that communicates with the second cavity 102, thereby connecting the wiring harness 80 inside the housing 10 to the outside of the housing 10. Of course, to prevent water and dust from entering the interior of the second cavity 102 through the wiring hole 104, a sealing ring and a cover corresponding to the wiring hole 104 are provided in this embodiment. The sealing ring is provided on the inner wall of the wiring hole 104, and the cover is detachably provided at the wiring hole 104 so that it can be sealed by the cover when wiring is not required.

[0077] like Figures 3 to 6As shown, the shell 10 also includes a partition 140 connected to the outer frame 110. The partition 140 is arranged between the mounting plate 130 and the back plate 150 along the first direction. The partition 140 extends toward one side of the cover plate 120. The partition 140 divides the inner cavity of the shell 10 into a first cavity 101 and a second cavity 102 arranged on both sides of the partition 140 along the first direction.

[0078] Specifically, the partition 140 is provided to divide the inner cavity of the housing 10 into a first cavity 101 and a second cavity 102 , thereby partitioning the battery module and the BDU 30 .

[0079] In this embodiment, during the assembly process, the mounting plate 130 is first fixed to the outer frame 110 by friction welding so that the mounting plate 130 is formed into the bottom plate of the second cavity 102, and then the reinforcing beam 70 is welded and fixed on the top surface of the mounting plate 130 for installing the BDU30 and strengthening the strength of the mounting plate 130, and then the connector 40 and the seal 90 are connected and installed at the mounting channel 131, and the seal 90 is fixed by bolts to clamp and fix the connector 40 by the fixing member and seal the mounting channel 131, and then the BMS20 is installed on the bottom surface of the mounting plate 130, and the BMS20 and the connector 40 are electrically connected through the display, and then the connector 40 is electrically connected to the battery module through another wiring harness 80, and finally the maintenance plate 60 is used to cover the notch of the mounting slot 103 to cover the BMS20, and when maintenance is required, the maintenance plate 60 can be removed to expose the BMS20 for maintenance.

[0080] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0081] The battery pack structure of the present application adopts the arrangement of the BMS20 on the bottom surface of the exterior of the housing 10, so that when the BMS20 needs to be repaired, there is no need to disassemble the battery pack structure. The BMS20 disposed on the exterior of the housing 10 can be directly repaired, which simplifies the overall repair operation, saves time and effort, and improves repair efficiency. The structural arrangement of the external BMS20 of the present application on the exterior of the housing 10 avoids the problem of complicated operation caused by the need to disassemble the battery pack in the prior art to repair the BMS20 inside the battery pack structure.

[0082] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0083] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0084] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0085] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A battery pack structure, characterized in that: include: A housing (10), the housing (10) having a first cavity (101) for mounting a battery module, and a second cavity (102) arranged on one side of the first cavity (101) along a first direction; A BMS (20) and a BDU (30), wherein the BDU (30) is arranged inside the second cavity (102), and the BMS (20) is arranged outside the second cavity (102) and connected to the bottom plate of the housing (10).

2. The battery pack structure according to claim 1, characterized in that: The bottom plate of the second cavity (102) is a mounting plate (130), and the BDU (30) and the BMS (20) are respectively arranged on two opposite sides of the mounting plate (130) along the height direction of the housing (10).

3. The battery pack structure according to claim 2, characterized in that: The first direction is the length direction of the housing (10); and / or The mounting plate (130) has a mounting hole, and the BMS (20) is locked in engagement with the mounting hole via a fastener.

4. The battery pack structure according to claim 2, characterized in that: A reinforcing beam (70) is provided on the top surface of the mounting plate (130), and the BDU (30) is provided on the reinforcing beam (70).

5. The battery pack structure according to claim 4, characterized in that: The reinforcing beam (70) is welded to the mounting plate (130); and / or The reinforcing beam (70) extends in a second direction perpendicular to the first direction; and / or A plurality of the reinforcing beams (70) are provided, and the plurality of reinforcing beams (70) are arranged at intervals along the first direction.

6. The battery pack structure according to claim 2, characterized in that: The mounting plate (130) is provided with a mounting channel (131) extending in a height direction of the housing (10), and the battery pack structure further comprises: A connector (40), the connector (40) being plugged into the interior of the installation channel (131); A wiring harness (80), one end of the connector (40) exposed outside the housing (10) is connected to the BMS (20) through the wiring harness (80), and the other end of the connector (40) located inside the housing (10) is used to connect to the battery module.

7. The battery pack structure according to claim 6, characterized in that: The battery pack structure further includes a sealing member (90), at least a portion of which is disposed between the mounting channel (131) and the connector (40).

8. The battery pack structure according to claim 7, characterized in that: The mounting plate (130) has an inner raised bent portion facing the second cavity (102), and the bent portion is formed with a mounting groove (103) along the height direction of the housing (10) with a notch opening facing away from the BDU (30), and the BMS (20) and the wiring harness (80) are arranged inside the mounting groove (103).

9. The battery pack structure according to claim 8, characterized in that: The battery pack structure further includes: a guard plate (50), the guard plate (50) being detachably disposed outside the first cavity (101) and connected to the bottom surface of the housing (10); A maintenance plate (60) is detachably connected to the mounting plate (130), the maintenance plate (60) covers the notch of the mounting slot (103), and the maintenance plate (60) is coplanar with the bottom surface of the guard plate (50) facing away from the notch.

10. The battery pack structure according to claim 9, characterized in that: The battery pack structure further includes a sealing strip, The sealing strip is provided between the maintenance plate (60) and the mounting plate (130); and / or The sealing strip is arranged between the guard plate (50) and the housing (10).

11. The battery pack structure according to any one of claims 1 to 10, characterized in that: The housing (10) comprises: outer frame (110); a back plate (150) and a mounting plate (130), wherein the back plate (150) and the mounting plate (130) are arranged at the bottom opening of the outer frame (110), the back plate (150) is used to support the battery module, and the BMS (20) and the BDU (30) are arranged on the mounting plate (130); A cover plate (120), wherein the cover plate (120) is arranged at the top opening of the outer frame (110).

12. The battery pack structure according to claim 11, characterized in that: The mounting plate (130) is fixed to the outer frame (110) by welding; and / or The outer frame (110) has a wiring hole (104) arranged to communicate with the second cavity (102).

13. The battery pack structure according to claim 11, characterized in that: The housing (10) further comprises a partition (140) connected to the outer frame (110), wherein the partition (140) is arranged between the mounting plate (130) and the back plate (150) along the first direction, and the partition (140) extends toward one side of the cover plate (120), and the partition (140) divides the inner cavity of the housing (10) into the first cavity (101) and the second cavity (102) arranged on both sides of the partition (140) along the first direction.

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