A BMS integrated BDU module

Abstract

The utility model belongs to the battery package technical field, especially the BMS's BDU module of integration is provided, including base, BMS board, BMS apron, BDU main part and main apron, the base is formed with a baffle, and the baffle divides the base into main area and side area, BMS board is installed in the side area, BDU main part is installed in the main area, and main apron is installed on the base in the main area, and fixed part is connected with the baffle through BMS apron and BMS board in proper order, and the plug -in of BDU main part is connected with BMS board, the BMS board and BDU main part are integrated to a base, and the baffle of both sides reduces the cost of whole, and also improves the integration level and space utilization.

Description

Technical Field

[0001] This utility model belongs to the field of battery pack technology, and specifically relates to a BDU module integrating BMS. Background Technology

[0002] Electric vehicles are the future trend of automobile development. The battery pack provides power to electric vehicles and is an essential component of electric vehicles. In this key system, the battery management system (BMS) and battery disconnection unit (BDU) are the two core control components, which respectively undertake key functions such as battery status monitoring, energy management, safety protection and high voltage circuit control.

[0003] Battery Management System (BMS) is a system that manages batteries. It typically measures battery voltage and prevents or avoids abnormal conditions such as over-discharge, over-charge, and over-temperature. Battery Distribution Unit (BDU), also known as Battery Distribution Unit, integrates high-voltage devices and includes pre-charge and charge / discharge circuits. It has functions such as current and voltage detection and controls the on / off state of the power battery circuit, providing overload and short-circuit protection for the system.

[0004] Most battery management systems (BMS) and battery disconnection units (BDUs) on the market adopt independent design and separate installation. Although this design meets the basic functional requirements to a certain extent, it has disadvantages such as large space occupation, high cost, and low integration. As electric vehicles develop towards higher energy density, higher integration and lower cost, its drawbacks are becoming increasingly prominent.

[0005] Therefore, there is an urgent need for a BDU module that integrates BMS. Utility Model Content

[0006] To address the aforementioned issues, this utility model proposes a BDU module integrating a BMS, comprising a base, a BMS board, and a BDU body. A partition is formed on the base, dividing the base into a main area and a side area. The BMS board is installed in the side area; the BDU main body is installed in the main area. The plug-in on the BDU main body connects to the BMS board, resulting in high integration and improved space utilization.

[0007] Furthermore, the base is provided with an insert; the BDU body includes electrical components fixed to the base by the insert; the electrical components are connected to the battery and BMS board via copper busbars and main wiring harnesses.

[0008] Furthermore, it also includes a BMS cover plate and a main cover plate; the main cover plate is installed on the base of the main area; the BMS cover plate is installed in the side area and connected to the partition.

[0009] Furthermore, the main wiring harness includes a data acquisition harness, a high-voltage harness, and a low-voltage control harness; The data acquisition harness connects the copper busbar and the BMS board; The high-voltage wiring harness connects the copper busbars and electrical components; The low-voltage control harness connects the electrical components and the BMS board.

[0010] Furthermore, the BDU module has external interfaces at both ends, and a protective cover is provided on the main cover plate at the corresponding position of the external interface.

[0011] Furthermore, a fixing post is provided on the side of the partition facing the BMS plate, and a threaded component is provided inside the fixing post; a first slot is provided on the side of the partition. The BMS board has through holes at the corresponding positions of the fixing posts; The BMS cover plate has countersunk holes at positions corresponding to the fixing posts. The fasteners pass through the countersunk holes and through holes in sequence to connect with the fixing posts. The side of the BMS cover plate has buckles corresponding to the first slot. The BMS cover plate is also equipped with a No. 3 reinforcing rib.

[0012] Furthermore, a limit component is provided on the base at the electrical component mounting position; A fixing component is provided on the base at the corresponding position of the main wiring harness; a No. 4 reinforcing rib is provided at the bottom of the base.

[0013] Furthermore, the partition is provided with an avoidance window; the BMS board is provided with a first plug-in and a second plug-in; the avoidance window includes a first window and a second window, the first window corresponds to the position of the first plug-in, and the second window corresponds to the position of the second plug-in; The partition is also equipped with a No. 1 reinforcing rib.

[0014] Furthermore, the main cover plate is provided with a limiting boss, and the partition plate is provided with a limiting groove at the corresponding position of the limiting boss.

[0015] Furthermore, the main cover plate is provided with heat dissipation holes and an upper cover hole; The second plug-in is connected to a BMS harness, which is fixed to the hole in the upper cover. The main cover plate is also provided with a second reinforcing rib.

[0016] Beneficial effects The advantages of this utility model over the prior art are as follows: 1. This application reduces the overall cost and improves integration and space utilization by integrating the BMS board and BDU body onto a single base with a shared side partition.

[0017] 2. This application connects the acquisition harness and the low-voltage control harness directly to the BMS board via the acquisition plug and the low-voltage control plug, eliminating the need for adapter plugs and reducing the space and cost.

[0018] 3. This application limits the movement of each contactor by setting L-shaped limiting ribs and straight diagonal ribs on the base, thereby ensuring the installation stability of each contactor.

[0019] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 An overall exploded view of an embodiment of this utility model is shown.

[0022] Figure 2 A front view schematic diagram of the BDU body in an embodiment of this utility model is shown.

[0023] Figure 3 An axonometric view of the base in an embodiment of this utility model is shown.

[0024] Figure 4 An axial side view of the inner side of the BMS cover plate in an embodiment of this utility model is shown.

[0025] Figure 5 A side view of the outer side of the BMS cover plate in an embodiment of this utility model is shown.

[0026] Figure 6 A front view schematic diagram of the BMS board in an embodiment of this utility model is shown.

[0027] Figure 7 An assembly diagram of the BMS board in an embodiment of this utility model is shown.

[0028] Figure 8 A front view of the base in an embodiment of this utility model is shown.

[0029] Figure 9 An axial side view of the main cover plate in an embodiment of this utility model is shown.

[0030] In the diagram, 1. Protective cover; 2. Main cover plate; 3. Top cover hole; 4. No. 2 strip; 5. BMS harness; 6. No. 1 plug-in; 7. No. 1 window; 8. Limiting groove; 9. BMS cover plate; 10. BMS board; 11. No. 2 plug-in; 12. No. 2 window; 13. Base; 14. Data acquisition plug; 15. Low-voltage control plug; 16. Fifth copper busbar; 17. Main positive contactor; 18. Third copper busbar; 19. Data acquisition harness; 20. High-voltage harness; 21. Low-voltage control harness; 22. Heating contactor; 23. No. 1 strip; 24. Heating fuse; 25. First copper busbar; 26. Fourth copper busbar; 27. Fast charging positive contactor; 28. Main negative contactor; 29. ​​Sixth copper busbar; 30. Pre-charge contactor; 31. Pre-charge resistor; 32. Slot No. 2; 33. Shunt; 34. Seventh copper busbar; 35. First reinforcing rib; 36. Slot No. 1; 37. Threaded part; 38. Fixing post; 39. Fourth reinforcing rib; 40. Insert; 41. Buckle; 42. Reinforcing rib No. 3; 43. Countersunk hole; 44. Data acquisition socket; 45. Low-voltage control socket; 46. Through hole; 47. Fastener; 48. L-shaped limiting rib; 49. Straight diagonal rib; 50. No. 3 slot; 51. U-shaped fixing rib; 52. Heat dissipation hole; 53. No. 2 reinforcing rib; 54. Limiting boss; 55. Second copper busbar. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] This application provides a BDU module integrated with a BMS, see reference. Figure 1 It includes a base 13, a BMS plate 10, a BMS cover plate 9, a BDU body and a main cover plate 2. A partition is formed on the base 13, which divides the base 13 into a main area and a side area. BMS board 10 is installed in the side area; BDU main body is installed in the main area; main cover plate 2 is installed on base 13 in the main area; The fastener 47 passes through the BMS cover plate 9 and the BMS plate 10 in sequence and connects to the partition plate; The plug-in on the BDU main body is connected to the BMS board 10.

[0033] The base 13 is made of plastic. The main area of ​​the base 13 is used to arrange the various electrical components in the BDU body; the side area is used to integrate the BMS board 10. When the BMS board 10 is installed on the partition, the clearance window avoids the plug-in on the BMS board 10 to ensure the proper fit and installation of the BMS board 10. Then, the BMS cover plate 9 is installed on the side of the BMS board 10 to cover and protect the BMS board 10. Then, the main cover plate 2 is placed on the BDU body and connected to the base 13 to cover and protect the BDU body. The overall integration is higher and the space utilization is improved.

[0034] This application reduces the overall cost and improves integration and space utilization by integrating the BMS board 10 and the BDU body onto a single base 13, with both sharing a partition on the same side.

[0035] In one embodiment of this utility model, an insert 40 is provided on the base 13; the BDU body includes electrical components fixed to the base 13 by the insert 40; the electrical components include a main positive contactor 17, a main negative contactor 28, a fast charging positive contactor 27, a pre-charging contactor 30, a heating contactor 22, a shunt 33, and a heating fuse 24; the electrical components are connected to the battery and the BMS board 10 through copper busbars and main wiring harnesses.

[0036] Multiple inserts 40 are set in the main area of ​​the base 13, and then the electrical components are fixed on the base 13. The electrical components and the battery and BMS board 10 are connected through copper busbars and main wiring harnesses to ensure the stability of the electrical component layout and installation.

[0037] In one embodiment of this utility model, reference is made to... Figure 2 The copper busbars include a first copper busbar 25, a second copper busbar 55, a third copper busbar 18, a fourth copper busbar 26, a fifth copper busbar 16, a sixth copper busbar 29, and a seventh copper busbar 34. The first copper busbar 25 connects the battery positive interface and the positive main positive contactor 17. The second copper busbar 55 connects the discharge positive interface and the negative main positive contactor 17. The third copper busbar 18 connects the positive main positive contactor 17 and the negative fast charging positive contactor 27. The fourth copper busbar 26 connects the positive fast charging positive contactor 27 and the fast charging positive interface. The fifth copper busbar 16 connects the discharge negative interface and the positive main negative contactor 28. The sixth copper busbar 29 connects the negative main negative contactor 28 and the shunt 33. The seventh copper busbar 34 connects the shunt 33 and the battery negative interface.

[0038] Each copper busbar connects the battery to each electrical component, ensuring the normal operation of each component.

[0039] In one embodiment of this utility model, reference is made to... Figure 2 The main harness includes a data acquisition harness 19, a high-voltage harness 20, and a low-voltage control harness 21. One end of the acquisition harness 19 is connected to the first copper busbar 25, the second copper busbar 55, the fourth copper busbar 26, the fifth copper busbar 16 and the seventh copper busbar 34, and the other end of the acquisition harness 19 is connected to the acquisition socket 44 on the BMS board 10 through the acquisition plug 14 for high voltage acquisition. The pre-charge contactor 30 and pre-charge resistor 31 are connected in series to the first copper busbar 25 and the second copper busbar 55 via the high-voltage wiring harness 20; the heating contactor 22 and heating fuse 24 are connected in series to the first copper busbar 25 and the heating negative interface via the high-voltage wiring harness 20; one end of the heating fuse 24 serves as the heating positive interface. One end of the low-voltage control harness 21 is connected to the main positive contactor 17, the main negative contactor 28, the fast charging positive contactor 27, the pre-charging contactor 30, and the heating contactor. The other end of the low-voltage control harness 21 is connected to the low-voltage control socket 45 on the BMS board 10 through the low-voltage control plug 15 for low-voltage control.

[0040] The acquisition harness 19 is connected to the copper busbar and the BMS board 10. The BMS board 10 calculates the differential pressure to determine whether each contactor is stuck. The low-voltage control harness 21 is connected to each contactor and the BMS board 10. The BMS board 10 controls the engagement of all contactors. The partition also has corresponding holes at the connection points of the acquisition harness 19 and the low-voltage control harness 21 with the BMS board, forming a channel connecting the two.

[0041] In one embodiment of this utility model, the BDU module has external interfaces at both ends, and a protective cover 1 is provided on the main cover plate 2 at the corresponding position of the external interface. The protective cover 1 is snapped onto the main cover plate 2 to protect the external interface and ensure the protective effect.

[0042] In one embodiment of this utility model, reference is made to... Figure 3 The partition is provided with a fixing post 38 on the side facing the BMS plate 10, and a threaded part 37 is provided in the fixing post 38; a first slot 36 is provided on the side of the partition. refer to Figure 6 The BMS plate 10 has a through hole 46 at the corresponding position of the fixing post 38; refer to Figure 5 The BMS cover plate 9 has a countersunk hole 43 at a position corresponding to the fixing post 38, for reference. Figure 4 The side of the BMS cover plate 9 is provided with a buckle 41 corresponding to the first card slot 36; The BMS cover plate 9 is also provided with a third reinforcing rib 42.

[0043] refer to Figure 7The fastener 47 passes through the countersunk hole 43 and the through hole 46 in sequence, and is then threadedly connected to the threaded part 37 in the fixing post 38. The fastener 47 is a bolt. At the same time, the buckle 41 on the BMS cover plate 9 engages with the slot, which can ensure the stability of the BMS cover plate 9 and the partition when fixing the bolt, making it easy to fix the whole, saving space and cost, and improving the stability of the fixation.

[0044] In one embodiment of this utility model, reference is made to... Figure 8 The base 13 is provided with L-shaped limiting ribs 48 at the installation positions of the main positive contactor 17, the main negative contactor 28 and the fast charging positive contactor 27; the base 13 is provided with straight diagonal ribs 49 at the installation positions of the pre-charging contactor 30 and the heating contactor 22. The base 13 is provided with a U-shaped fixing rib 51, which fixes the main wire harness through the first strip 23; the base 13 is also provided with a second slot 32 and a third slot 50, the third slot 50 fixes the pre-charge resistor 31; the bottom of the base 13 is provided with a fourth reinforcing rib 39.

[0045] L-shaped limiting ribs 48 limit the main positive contactor 17, main negative contactor 28, and fast charging positive contactor 27; straight diagonal ribs 49 limit the pre-charging contactor 30 and heating contactor 22; U-shaped fixing ribs 51 are used to fix the main wire harness after it passes through, through the first strip 23, to ensure the regularity of the main wire harness arrangement in the main area; simultaneously, a second slot 32 is also provided to limit the main wire harness; the fourth reinforcing rib 39 at the bottom of the base 13 improves the strength of the base 13.

[0046] In one embodiment of this utility model, reference is made to... Figure 6 The partition is provided with an avoidance window; the BMS board 10 is provided with a first plug-in 6 and a second plug-in 11; Reference Figure 1 and Figure 3 The avoidance window includes window 7 and window 12. Window 7 corresponds to the position of plug-in 6, and window 12 corresponds to the position of plug-in 11. The partition is also provided with a No. 35 reinforcing rib.

[0047] Window 7 is a clearance groove, forming a space for insert 6. Window 12 is a clearance hole, forming a space for insert 11. Insert 11 is connected to the electrical components in the main area. This improves the integration of BMS board 10 with the whole. The first reinforcing rib 35 on the partition increases the strength of the partition.

[0048] refer to Figure 9 and Figure 1The main cover plate 2 is provided with a limiting boss 54, and a limiting groove 8 is formed on the partition plate at the corresponding position of the limiting boss 54.

[0049] One end of the main cover plate 2 near the partition is locked into the limiting groove 8 by the limiting boss 54 for limiting, and the other end of the main cover plate 2 is fixed to the base 13 by bolts, so as to stabilize the main cover plate 2 while improving the space utilization.

[0050] The main cover plate 2 is provided with heat dissipation holes 52 and upper cover holes 3; refer to Figure 1 The second plug-in 11 is connected to a BMS harness 5, and the BMS harness 5 is fixed to the upper cover hole 3 by the second strip 4. The main cover plate 2 is also provided with a second reinforcing rib 53.

[0051] The heat dissipation holes 52 on the main cover plate 2 dissipate heat from the BDU body. The BMS wiring harness 5 on the second plug-in 11 passes through the upper cover hole 3 and is fixed to the main cover plate 2 by the second strip 4. The crisscrossing second reinforcing ribs 53 on the main cover plate 2 improve the strength of the main cover plate 2.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A BDU module integrating a BMS, characterized in that, Includes a base (13), a BMS plate (10), and a BDU body. A partition is formed on the base (13), which divides the base (13) into a main area and a side area. The BMS board (10) is installed in the side area; the BDU main body is installed in the main area; The plug-in on the BDU body is connected to the BMS board (10).

2. The BDU module integrating BMS according to claim 1, characterized in that, An insert (40) is provided on the base (13); the BDU body includes electrical components fixed on the base (13) by the insert (40); the electrical components are connected to the battery and BMS board (10) by copper busbars and main wiring harness.

3. The BDU module integrating BMS according to claim 2, characterized in that, It also includes a BMS cover plate (9) and a main cover plate (2); the main cover plate (2) is installed on the base (13) of the main area; the BMS cover plate (9) is installed on the side area and connected to the partition.

4. A BDU module integrating a BMS according to claim 2, characterized in that, The main harness includes a data acquisition harness (19), a high-voltage harness (20), and a low-voltage control harness (21). The acquisition harness (19) connects the copper busbar and the BMS board (10); The high-voltage harness (20) connects the copper busbar and electrical components; The low-voltage control harness (21) connects the electrical components and the BMS board (10).

5. A BDU module integrating a BMS according to claim 3, characterized in that, The BDU module has external interfaces at both ends, and a protective cover (1) is provided on the main cover plate (2) at the corresponding position of the external interface.

6. A BDU module integrating a BMS according to claim 2, characterized in that, A fixing post (38) is provided on the side of the partition facing the BMS plate (10), and a threaded part (37) is provided in the fixing post (38); a first slot (36) is provided on the side of the partition. The BMS plate (10) has through holes (46) at the corresponding positions of the fixing posts (38); The BMS cover plate (9) has a countersunk hole (43) at a position corresponding to the fixing post (38). The fastener (47) passes through the countersunk hole (43) and the through hole (46) in sequence and is connected to the fixing post (38). The side of the BMS cover plate (9) has a buckle (41) corresponding to the first slot (36). The BMS cover plate (9) is also provided with a No. 3 reinforcing rib (42).

7. A BDU module integrating a BMS according to claim 1, characterized in that, Limiting components are provided on the base (13) at the electrical component mounting positions; The base (13) is provided with a fixing component at the corresponding position of the main wire harness; the bottom of the base (13) is provided with a No. 4 reinforcing rib (39).

8. A BDU module integrating a BMS according to claim 5, characterized in that, The partition is provided with an avoidance window; the BMS board (10) is provided with a first plug-in (6) and a second plug-in (11); the avoidance window includes a first window (7) and a second window (12), the first window (7) corresponds to the position of the first plug-in (6), and the second window (12) corresponds to the position of the second plug-in (11); The partition is also provided with a No. 1 reinforcing rib (35).

9. A BDU module integrating a BMS according to claim 3, characterized in that, The main cover plate (2) is provided with a limiting boss (54), and a limiting groove (8) is opened on the partition plate at the corresponding position of the limiting boss (54).

10. A BDU module integrating a BMS according to claim 8, characterized in that, The main cover plate (2) is provided with heat dissipation holes (52) and upper cover holes (3); The second plug-in (11) is connected to a BMS harness (5), and the BMS harness (5) is fixed on the upper cover hole (3); The main cover plate (2) is also provided with a second reinforcing rib (53).

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