BDU mounting rack, BDU and battery pack

Abstract

The utility model relates to the technical field of a device for cutting off current of a secondary battery, in particular to a BDU mounting rack, a BDU and a battery pack, the BDU mounting rack comprises at least two layers of component mounting plates arranged in a layered manner and interlayer fixing bodies connected with the two adjacent layers of component mounting plates, the component mounting structure used for mounting components is arranged on the interlayer fixing body, so that the components of the BDU not only can be mounted on the component mounting plate, but also can be mounted on the interlayer fixing body, the interlayer fixing body and the component mounting plate are both used for mounting the components, the mounting positions of the components are more flexible, and the mounting efficiency is improved. Each part of the BDU mounting rack is conveniently and fully utilized to provide a mounting basis, so that each component is prevented from occupying an overlarge height in the layering direction of the component mounting plate, the space in a battery pack box body is favorably adapted, and the space utilization rate is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of devices for cutting off current in secondary batteries, specifically to a BDU mounting bracket, a BDU, and a battery pack. Background Technology

[0002] The Battery Disconnect Unit (BDU) is an important component in the battery system of new energy vehicles. The BDU is installed together with the battery pack in the battery pack housing and controls the charging and discharging process of the electric vehicle.

[0003] Chinese utility model patent CN220086149U discloses a battery distribution unit (BDU) and a battery pack. The battery pack includes a housing, and the BDU is installed inside the housing. The BDU includes a first substrate assembly, a second substrate assembly, and a fixing structure. The fixing structure is a metal bracket, with one end fixedly connected to the first substrate and the other end fixedly connected to the second substrate. The fixing structure fixes the first substrate assembly and the second substrate assembly together. The first substrate assembly is located above the second substrate assembly, forming a double-layer structure. Electronic components can be mounted on both the upper and lower surfaces of the first substrate, and the upper surface of the second substrate can also be used to mount electronic components. The electronic components mounted on the first substrate include a monitoring module, an insulation detection module, a first battery management module, and a second battery management module. The first battery management module and the second battery management module are mounted on the side of the first substrate away from the second substrate. The insulation detection module and the second battery management module are mounted on the side of the first substrate closer to the second substrate. The monitoring module can monitor the voltage and temperature of the battery cells in the battery pack. The insulation detection module is used to perform insulation detection on the battery pack. The first battery management module and the second battery management module are used to control the on and off states of the electronic components mounted on the second substrate. The electronic components mounted on the second substrate include a main positive relay, a pre-charge resistor, and a pre-charge relay. The second substrate also has various electrode rows connecting the electronic components thereon. The battery positive terminal connection point, battery negative terminal connection point, DC fast charging positive terminal, DC fast charging negative terminal, DC power supply positive terminal, and DC power supply negative terminal are respectively set on the corresponding electrode rows, forming external electrical connection parts using the electrode rows. The first substrate and the second substrate respectively constitute component mounting plates for mounting components. The fixing structure forms an interlayer fixing body that fixes adjacent component mounting plates. The first substrate, the second substrate, and the fixing structure together form a mounting frame.

[0004] The aforementioned BDU mounts all components onto a first substrate and a second substrate. Since the first substrate and the second substrate are layered and both the upper and lower surfaces of the first substrate and the upper surface of the second substrate are mounting surfaces, a large distance needs to be left between the first substrate and the second substrate to ensure mounting space. This results in a relatively high mounting bracket, which is not well adapted to battery packs with limited height space inside the battery pack. Furthermore, in order to provide a sufficiently large mounting surface, the substrate size is also relatively large, which affects the space utilization when arranging the BDU inside the battery pack. Utility Model Content

[0005] The purpose of this invention is to provide a BDU mounting bracket to solve the problem that the current BDU structure, which mounts all components on the first and second substrates, results in low space utilization. The purpose of this invention is also to provide a BDU and battery pack to solve the aforementioned problems.

[0006] The technical solution of this utility model's BDU mounting bracket is:

[0007] A BDU mounting bracket includes at least two layers of component mounting plates arranged in layers and an interlayer fixing body connected to the two adjacent component mounting plates. The interlayer fixing body is provided with a component mounting structure for mounting components.

[0008] Furthermore, the interlayer fixing body includes two opposing side walls and a connecting wall connecting the two side walls, and the component mounting structure is provided on the side walls and / or the connecting wall.

[0009] Furthermore, the component mounting plate and the interlayer fixing body form the internal space of the BDU mounting frame. One end of the connecting wall is connected to one end of the side wall, and the BDU mounting frame has a side opening facing away from the connecting wall at the other end of the side wall. The side opening allows the conductive bar in the internal space of the BDU mounting frame to extend out.

[0010] Furthermore, windows are provided on the side walls and / or connecting walls.

[0011] Furthermore, the lower component mounting plate in the two adjacent component mounting plates has an area for external electrical connection, and the upper component mounting plate in the two adjacent component mounting plates is staggered from the area for external electrical connection to avoid obstructing the external electrical connection of the BDU from above.

[0012] Furthermore, the interlayer fixing body is integrally connected to the lower component mounting plate of the two adjacent component mounting plates and is detachably connected to the upper component mounting plate of the two adjacent component mounting plates.

[0013] Furthermore, the interlayer fixing body and the lower component mounting plate of the two adjacent component mounting plates are integrally formed by bending the sheet metal. The side of the interlayer fixing body facing away from the internal space of the BDU mounting frame is fixedly connected to the box fixing component, which is used to fix the battery pack box.

[0014] The beneficial effects of this utility model's BDU mounting bracket are as follows: This utility model improves upon existing BDU mounting brackets by utilizing interlayer fixing bodies connected to adjacent component mounting plates to set up a component mounting structure. This allows BDU components to be mounted not only on the component mounting plates but also on the interlayer fixing bodies, making both the interlayer fixing bodies and component mounting plates suitable for component mounting. This makes the component mounting positions more flexible, facilitates full utilization of the mounting base provided by each part of the BDU mounting bracket, avoids excessive height occupation of each component in the layering direction of the component mounting plates, and helps to adapt to the space inside the battery pack housing, thereby improving space utilization.

[0015] The technical solution of the BDU of this utility model is:

[0016] A BDU includes a BDU mounting bracket, which includes at least two layers of component mounting plates arranged in layers and an interlayer fixing body connected to the two adjacent component mounting plates. The interlayer fixing body is provided with a component mounting structure for mounting components.

[0017] Furthermore, the interlayer fixing body includes two opposing side walls and a connecting wall connecting the two side walls, and the component mounting structure is provided on the side walls and / or the connecting wall.

[0018] Furthermore, the component mounting plate and the interlayer fixing body form the internal space of the BDU mounting frame. One end of the connecting wall is connected to one end of the side wall, and the BDU mounting frame has a side opening facing away from the connecting wall at the other end of the side wall. The side opening allows the conductive bar in the internal space of the BDU mounting frame to extend out.

[0019] Furthermore, windows are provided on the side walls and / or connecting walls.

[0020] Furthermore, the lower component mounting plate in the two adjacent component mounting plates has an area for external electrical connection, and the upper component mounting plate in the two adjacent component mounting plates is staggered from the area for external electrical connection to avoid obstructing the external electrical connection of the BDU from above.

[0021] Furthermore, the interlayer fixing body is integrally connected to the lower component mounting plate of the two adjacent component mounting plates and is detachably connected to the upper component mounting plate of the two adjacent component mounting plates.

[0022] Furthermore, the interlayer fixing body and the lower component mounting plate of the two adjacent component mounting plates are integrally formed by bending the sheet metal. The side of the interlayer fixing body facing away from the internal space of the BDU mounting frame is fixedly connected to the box fixing component, which is used to fix the battery pack box.

[0023] Furthermore, the BDU includes a signal transmission connector and a controller. The signal transmission connector is connected to the controller via a wire, and the signal transmission connector is provided with a fixing structure for fixing to the housing of the battery pack.

[0024] The beneficial effects of this utility model's BDU are as follows: This utility model improves upon the existing BDU mounting bracket by utilizing an interlayer fixing body connected to adjacent component mounting plates to set up a component mounting structure. This allows BDU components to be mounted not only on the component mounting plates but also on the interlayer fixing body, making both the interlayer fixing body and the component mounting plates suitable for component mounting. This makes the component mounting position more flexible, facilitates full utilization of the mounting base provided by each part of the BDU mounting bracket, avoids excessive height occupation of each component in the layering direction of the component mounting plate, and helps to adapt to the space inside the battery pack box, thereby improving space utilization.

[0025] The technical solution of the battery pack of this utility model is as follows:

[0026] A battery pack includes a battery unit (BDU), the BDU including a BDU mounting frame, the BDU mounting frame including at least two layers of component mounting plates arranged in layers and an interlayer fixing body connected to the two adjacent layers of component mounting plates, the interlayer fixing body having a component mounting structure for mounting components.

[0027] Furthermore, the interlayer fixing body includes two opposing side walls and a connecting wall connecting the two side walls, and the component mounting structure is provided on the side walls and / or the connecting wall.

[0028] Furthermore, the component mounting plate and the interlayer fixing body form the internal space of the BDU mounting frame. One end of the connecting wall is connected to one end of the side wall, and the BDU mounting frame has a side opening facing away from the connecting wall at the other end of the side wall. The side opening allows the conductive bar in the internal space of the BDU mounting frame to extend out.

[0029] Furthermore, windows are provided on the side walls and / or connecting walls.

[0030] Furthermore, the lower component mounting plate in the two adjacent component mounting plates has an area for external electrical connection, and the upper component mounting plate in the two adjacent component mounting plates is staggered from the area for external electrical connection to avoid obstructing the external electrical connection of the BDU from above.

[0031] Furthermore, the interlayer fixing body is integrally connected to the lower component mounting plate of the two adjacent component mounting plates and is detachably connected to the upper component mounting plate of the two adjacent component mounting plates.

[0032] Furthermore, the interlayer fixing body and the lower component mounting plate of the two adjacent component mounting plates are integrally formed by bending the sheet metal. The side of the interlayer fixing body facing away from the internal space of the BDU mounting frame is fixedly connected to the box fixing component, which is used to fix the battery pack box.

[0033] Furthermore, the BDU includes a signal transmission connector and a controller. The signal transmission connector is connected to the controller via a wire, and the signal transmission connector is provided with a fixing structure for fixing to the housing of the battery pack.

[0034] The beneficial effects of this utility model on the battery pack are as follows: This utility model improves upon the existing battery pack BDU mounting frame by using an interlayer fixing body connected to two adjacent component mounting plates to set up a component mounting structure. This allows the BDU components to be mounted not only on the component mounting plates but also on the interlayer fixing body, making both the interlayer fixing body and the component mounting plates suitable for component mounting. This makes the component mounting position more flexible, facilitates full utilization of the mounting base provided by each part of the BDU mounting frame, avoids excessive height occupation of each component in the layer direction of the component mounting plate, and helps to adapt to the space inside the battery pack, thereby improving space utilization. Attached Figure Description

[0035] Figure 1 This is a perspective view of an embodiment of the BDU of this utility model;

[0036] Figure 2 for Figure 1 A schematic diagram of the housing and its internal components;

[0037] Figure 3 for Figure 1 Top view of the BDU;

[0038] Figure 4 for Figure 1 A schematic diagram of the BDU mounting bracket.

[0039] In the diagram: 1. Cover plate; 2. Housing; 21. Base plate; 22. Side wall; 23. Connecting wall; 24. Area for external electrical connections; 3. BMS controller; 4. Monitoring module; 5. Insulation detection module; 6. Fuse; 7. Relay; 8. Pre-charge resistor; 9. Load connection busbar; 10. Signal transmission connector; 11. Battery positive terminal connection busbar; 12. Battery negative terminal connection busbar; 13. Housing fastener. Detailed Implementation

[0040] This utility model's BDU mounting bracket utilizes an interlayer fixing body connected to two adjacent component mounting plates to set up a component mounting structure. This allows BDU components to be mounted not only on the component mounting plates but also on the interlayer fixing body, making both the interlayer fixing body and the component mounting plates suitable for component mounting. This makes the component mounting position more flexible, facilitates full utilization of the mounting base provided by each part of the BDU mounting bracket, avoids excessive height occupation by each component in the layering direction of the component mounting plate, and helps to adapt to the space inside the battery pack box, improving space utilization.

[0041] Embodiments of the BDU of this utility model:

[0042] like Figure 1 , Figure 2 As shown, the BDU includes a mounting bracket and various components. The mounting bracket, also known as the BDU mounting frame, includes a housing 2 and a cover plate 1. The housing 2 has an inner cavity, and the cover plate 1 covers the upper end of the housing 2. The cover plate 1 and the housing 2 form the mounting base for the components. The components of the BDU include a BMS controller 3, a monitoring module 4, an insulation detection module 5, a fuse 6, a relay 7, and a pre-charge resistor 8. The BDU is installed inside the battery pack housing. The monitoring module 4 can monitor the voltage and temperature of the battery cells in the battery pack. The insulation detection module 5 is used to perform insulation detection on the battery pack. The BMS controller 3 is used to control the opening and closing states of the corresponding electronic components. The components are connected to each other through wires and busbars.

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the housing 2 includes an integrally connected base plate 21, two side walls 22 arranged opposite to each other, and a connecting wall 23. The base plate 21 and the cover plate 1 are spaced apart vertically, forming two layered component mounting plates of the BDU mounting bracket. The two side walls 22 and the connecting wall 23 are used to form an interlayer fixing body connected to the two layered component mounting plates. The connecting wall 23 of the interlayer fixing body is provided with a component mounting structure for mounting components. The monitoring module 4 and the insulation detection module 5 are mounted on the connecting wall 23. The BMS controller 3 is mounted on the cover plate 1. The base plate 21 of the housing 2 is integrally connected to the cover plate 1. The BDU is equipped with a fuse 6, a relay 7, and a pre-charge resistor 8. The component mounting structure is set up by using the interlayer fixing body connected to the adjacent two layers of component mounting plates. This allows the BDU components to be mounted not only on the component mounting plates but also on the interlayer fixing body. This makes both the interlayer fixing body and each layer of component mounting plates usable for component mounting, making the component mounting position more flexible. It is easy to make full use of the mounting base provided by each part of the BDU mounting frame, avoids that each component occupies too much height in the layer direction of the component mounting plate, and is conducive to adapting to the space inside the battery pack box, thus improving space utilization.

[0044] Both the side walls 22 and the connecting wall 23 of the housing 2 are perpendicular to the base plate 21. The left and right ends of the connecting wall 23 are connected to the left and right side walls 22, respectively. The connecting wall 23 is provided with a component mounting structure for mounting corresponding components. The component mounting structure consists of mounting holes on the connecting wall 23. The corresponding monitoring module 4 and insulation detection module 5 are fixed to the outer surface of the connecting wall 23 by screws. Connecting the connecting wall 23 to the two side walls 22 helps to improve the structural strength of the housing 2. The cover plate 1 and the housing 2 enclose the internal space of the BDU mounting frame. The components mounted on the upper side of the base plate 21 of the housing 2 are arranged using the internal space of the BDU mounting frame. The components on the cover plate 1 are mounted on the upper side of the cover plate 1, and no components are mounted on the lower side of the cover plate 1, which can reduce the height of the BDU mounting frame. The components mounted on the connecting wall 23 of the housing 2 are installed on the outer side of the connecting wall 23, which faces away from the internal space of the BDU mounting bracket. The connecting wall 23 is connected to the rear end of the side wall 22. The BDU mounting bracket has a side opening at the front end of the side wall 22, facing away from the connecting wall 23. The side opening is open to the front, allowing the conductive busbars inside the BDU mounting bracket to extend out for easy wiring. Windows are provided on both the side wall 22 and the connecting wall 23 of the housing 2 to facilitate heat dissipation and reduce weight. The housing 2 is made of a high thermal conductivity material. The windows on the left and right side walls 22 and the rear connecting wall 23 of the housing 2 facilitate heat conduction of the resistive elements and heat dissipation inside the housing 2. The windows also facilitate the connection of the conductive busbars and wires.

[0045] The base plate 21 of the housing 2 forms the lower component mounting plate in an adjacent two-layer component mounting plate. The base plate 21 has an external electrical connection area 24 located at the front of the base plate 21. This area is used to house the external electrical connections of the BDU (Body Duty Unit). These connections include electrical connections for connecting to a load and electrical connections for connecting to a charging circuit. These connections are formed by corresponding conductive busbars. The electrical connection for connecting to the load is the end of the corresponding load-connecting conductive busbar 9. Both the load-connecting and charging circuit-connecting connections are located on the same side of the BDU mounting bracket for easy arrangement and connection. The cover plate 1 forms the upper component mounting plate in an adjacent two-layer component mounting plate. The external electrical connection area 24 of the cover plate 1 is offset from that of the base plate 21. The width of the cover plate 1 in the front-rear direction is smaller than the width of the base plate 21 in the front-rear direction. Figure 3 The cover plate 1 is positioned above the front of the base plate 21 to prevent the cover plate 1 from obstructing the external electrical connection of the BDU. The front end of the cover plate 1 is offset from the front end of the base plate 21, thereby forming an upward opening at the front of the BDU mounting bracket. The upward opening provides operating space and facilitates the connection of the external electrical connection. The entire BDU can be removed from the battery pack housing without removing the cover plate 1, making it convenient for the overall disassembly and maintenance of the BDU.

[0046] The cover plate 1 is detachably connected to the housing 2. The upper ends of the side wall 22 and connecting wall 23 of the housing 2 are provided with inward-curving edges. Mounting holes are provided on the inward-curving edges to allow the cover plate 1 to be fixed to the inward-curving edges with screws. This facilitates the connection of the cover plate 1 and improves the strength of the housing 2. The cover plate 1 can be disassembled individually as needed to maintain the components on it. The bottom plate 21 of the housing 2 is integrally formed with the connecting wall 23 and side wall 22 by bending sheet metal. The lower ends of the bottom plate 21, connecting wall 23, and side wall 22 are integrally connected, facilitating manufacturing. Near the lower end of the side wall 22 of the housing 2, a housing fastener 13 is provided. The housing fastener 13 is fixed to the side of the side wall 22 facing away from the internal space of the BDU mounting frame. The housing fastener 13 is used to fix the battery pack housing. The housing fastener 13 is welded to the side wall 22 of the housing 2. The housing fastener 13 on the outside of the housing 2 fixes the BDU mounting frame to the battery pack housing, resulting in a simple structure and easy fixing operation.

[0047] The BDU also includes a signal transmission connector 10, which is connected to the BMS controller 3 via a wire. The signal transmission connector 10 has a fixing structure for fixing to the battery pack housing, facilitating connector fixing and insertion operations. The connector can be removed along with the BDU for easy maintenance later. The BDU has connection parts for connecting the positive and negative terminals of the battery pack. The connection part for connecting the positive terminal of the battery pack is formed through a positive terminal connection conductive bus 11, and the connection part for connecting the negative terminal of the battery pack is formed through a negative terminal connection conductive bus 12. The cover plate 1 has a clearance hole for one end of the positive terminal connection conductive bus 11 to pass through, and the end of the positive terminal connection conductive bus 11 that extends above the cover plate 1 has a connection part for connecting the positive terminal of the battery pack. A window in one side wall 22 of the housing 2 allows the negative terminal connection conductive bus 12 to pass through, so as to accommodate the connection position of the negative terminal of the battery pack.

[0048] In other embodiments, the interlayer connector may not have a connecting wall, but instead a component mounting structure may be provided on the side wall of the interlayer connector.

[0049] In other embodiments, if the installation space allows, component mounting structures can be provided on both the side walls and connecting walls of the interlayer fixing body.

[0050] In other embodiments, a front connecting wall can also be provided at the front end of both side walls of the housing. In this case, an avoidance opening can be made on the front connecting wall to avoid the conductive busbar.

[0051] In other embodiments, windows may not be provided on the side walls and connecting walls of the housing, or windows may be provided only on the side walls or connecting walls.

[0052] In other embodiments, the interlayer fixing body can also be detachably connected to the lower component mounting plate of two adjacent component mounting plates and integrally connected to the upper component mounting plate of two adjacent component mounting plates.

[0053] In other embodiments, the interlayer fixing body can also be separately set from the two component mounting plates and fixedly connected by screws.

[0054] In other embodiments, three or more component mounting plates may be provided, and the interlayer fixing body is the part of the BDU mounting bracket used to fix and connect adjacent component mounting plates.

[0055] In other embodiments, the component mounting structure can also be fixed to the component mounting plate with fixing studs, and the fixing studs are used in conjunction with the fixing holes on the components to fix and install the components.

[0056] Embodiments of the BDU mounting bracket of this utility model:

[0057] The BDU mounting bracket in this embodiment is the same as the BDU mounting bracket in the above-described BDU embodiments, and will not be described again here.

[0058] Embodiments of the battery pack of this utility model:

[0059] The battery pack includes a housing and a BDU installed inside the housing. The BDU in this embodiment is the same as the BDU in the above-described embodiments, and will not be described again here.

[0060] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A BDU mounting bracket, comprising at least two layers of component mounting plates arranged in layers and interlayer fixing bodies connected to the two adjacent component mounting plates, characterized in that, The interlayer fixing body is provided with a component mounting structure for mounting components. The interlayer fixing body includes two opposite side walls and a connecting wall connecting the two side walls. The component mounting structure is provided on the side walls and / or the connecting wall. The component mounting plate and the interlayer fixing body enclose the internal space of the BDU mounting frame. The connecting wall is connected to one end of the side wall. The BDU mounting frame has a side opening at the other end of the side wall facing away from the connecting wall. The side opening allows the conductive bar in the internal space of the BDU mounting frame to extend out.

2. The BDU mounting bracket according to claim 1, characterized in that, Windows are provided on the side walls and / or connecting walls.

3. The BDU mounting bracket according to claim 1, characterized in that, The lower component mounting plate in two adjacent component mounting plates has an area for external electrical connection. The upper component mounting plate in two adjacent component mounting plates is staggered from the area for external electrical connection to avoid obstructing the external electrical connection of the BDU from above.

4. The BDU mounting bracket according to claim 1, characterized in that, The interlayer fixing body is integrally connected to the lower component mounting plate of the two adjacent component mounting plates and can be detachably connected to the upper component mounting plate of the two adjacent component mounting plates.

5. The BDU mounting bracket according to claim 4, characterized in that, The interlayer fixing body and the lower component mounting plate of the two adjacent component mounting plates are integrally formed by bending the sheet metal. The side of the interlayer fixing body facing away from the internal space of the BDU mounting frame is fixedly connected to the box fixing component, which is used to fix the battery pack box.

6. A BDU, characterized in that, Includes the BDU mounting bracket as described in any one of claims 1-5.

7. The BDU according to claim 6, characterized in that, The BDU includes a signal transmission connector and a controller. The signal transmission connector is connected to the controller via a wire and has a fixing structure for fixing it to the housing of the battery pack.

8. A battery pack, characterized in that, Includes the BDU as described in claim 6 or 7.

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