Middle cross beam structure of integrated BMS assembly and power battery

Abstract

The utility model relates to the technical field of lithium ion batteries, and provides a middle cross beam structure of an integrated BMS (battery management system) assembly and a power battery, the middle cross beam structure of the integrated BMS assembly comprises a cross beam provided with two transversely distributed mounting grooves; the BMS assembly comprises a BMS main board and a BMS slave board, and the BMS main board and the BMS slave board are detachably connected into the two mounting grooves respectively; the utility model has the beneficial effects that the integrated design that the BMS assembly is arranged in the cross beam is adopted, so that the PACK arrangement space is saved, the total electric quantity of the PACK can be increased, and the requirement on higher pure electric endurance mileage of the whole vehicle is met; compared with the prior art, an original BMS fixing support assembly is omitted, compared with the position where the original BMS assembly 2 is arranged at the end of the battery box body, the voltage and temperature sampling circuits (wires) of the battery cells are shortened by half, and cost reduction and PACK arrangement space saving are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium-ion batteries, and relates to a middle crossbeam structure integrating a BMS assembly and a power battery. Background Art

[0002] The BMS assembly is a battery management system, which plays a key role in modern electronic devices, especially in electric vehicles and renewable energy storage systems. Its main functions include monitoring the state of the battery pack, protecting the battery from overcharging and over-discharging, and optimizing the battery performance and extending its service life.

[0003] At present, the structural layout of the BMS assembly adopts a traditional independent structural design, which is independently separated from the crossbeam in the middle of the battery box and is fixedly connected to the crossbeam by screws. The existing solutions have the following disadvantages:

[0004] Due to the adoption of an independent BMS assembly structural design in the existing solutions and being fixed to one end inside the PACK (the combined packaging technology of the battery pack) by brackets, there is a waste of PACK space, resulting in a reduction in the energy density inside the battery box and a decrease in the total power of the whole pack of batteries; at the same time, the arrangement and fixation require adding independent mounting bracket parts, resulting in an increase in cost. Therefore, there is an urgent need for a middle crossbeam structure integrating a BMS assembly to solve the above problems. Summary of the Utility Model

[0005] In view of the above technical problems existing in the prior art, a middle crossbeam structure integrating a BMS assembly and a power battery is provided. The integrated design of the BMS assembly inside the crossbeam saves the PACK layout space, can increase the total power of the PACK, and meets the requirements of higher pure electric driving range of the whole vehicle; the original BMS fixed bracket assembly is cancelled, and compared with the position where the original BMS assembly 2 is arranged at the end of the battery box, the voltage and temperature sampling circuits (wires) of half of the battery cells are shortened, both of which achieve cost reduction and saving of the PACK layout space.

[0006] The purpose and effect of the utility model are achieved by the following specific technical means:

[0007] A middle crossbeam structure integrating a BMS assembly includes:

[0008] A crossbeam, on which two transversely distributed mounting grooves are opened;

[0009] A BMS assembly, which includes a BMS main board and a BMS slave board, and the BMS main board and the BMS slave board are respectively detachably connected to the two mounting grooves.

[0010] Optionally, the top of the crossbeam has two integrally formed extension parts, and the two extension parts respectively cover the BMS main board and the BMS slave board.

[0011] Optionally, a plurality of mounting holes are formed at the bottom of the cross beam.

[0012] A plurality of jacks corresponding to the plurality of mounting holes are formed on the BMS main board and the BMS slave board respectively, bolts are inserted into the jacks, and the upper ends of the bolts penetrate through the top of the cross beam.

[0013] Optionally, a plurality of through holes are formed on the outer wall of the cross beam.

[0014] The present utility model further provides a power battery, which includes the middle cross beam structure integrating the BMS assembly and a battery box body as described above, and the middle cross beam structure integrating the BMS assembly is installed in the middle of the battery box body.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] Adopting the integrated design with the BMS assembly packaged inside the cross beam, first, it saves the PACK layout space, the total PACK power can be increased by about 3 kWh, and the energy density in the battery box body is increased by about 3%, meeting the requirements of higher pure electric cruising range of the whole vehicle; second, the original BMS fixed bracket assembly is cancelled, and the cost can be reduced by about 15 yuan per set; third, compared with the position where the original BMS assembly 2 is arranged at the end of the battery box body, the voltage and temperature sampling circuits (wires) of the battery cells are shortened by half, which can further reduce the cost (reduce the cost of the CCS assembly by about 10%) and save the PACK layout space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall three-dimensional structure schematic diagram of the present utility model;

[0018] Figure 2 is the overall another three-dimensional structure schematic diagram of the present utility model;

[0019] Figure 3 is the overall bottom view structure schematic diagram of the present utility model;

[0020] Figure 4 is the overall side view structure schematic diagram of the present utility model.

[0021] Markings in the figure: cross beam 1, mounting hole 11, mounting groove 12, extension part 13, through hole 14, BMS assembly 2, BMS main board 21, BMS slave board 22, jack 23, bolt 24. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Please refer to Figures 1-4 , for further description of the embodiments of the present utility model;

[0023] A middle cross beam structure integrating a BMS assembly, comprising:

[0024] Crossbeam 1, on which there are two transversely distributed mounting grooves 12.

[0025] BMS assembly 2, which includes a BMS main board 21 and a BMS slave board 22, and the BMS main board 21 and the BMS slave board 22 are respectively detachably connected in the two mounting grooves 12.

[0026] In this embodiment, it should be noted that the crossbeam 1 is installed in the middle of the battery box. By opening two mounting grooves 12 on the crossbeam 1, the BMS main board 21 and the BMS slave board 22 are accommodated in these two mounting grooves 12. The integrated design of the BMS assembly 2 being included in the crossbeam 1 has the following advantages compared with the prior art: First, it saves the PACK layout space. The total PACK power can be increased by about 3 kWh, and the energy density in the battery box is increased by about 3%, meeting the requirements of the vehicle for a higher pure electric driving range; Second, the original BMS fixed bracket assembly is cancelled, and the cost can be reduced by about 15 yuan / set; Third, compared with the original position where the BMS assembly 2 is arranged at the end of the battery box, the voltage and temperature sampling circuit (wire) of the battery cells is shortened by half, which can further reduce costs (reduce the cost of the CCS assembly by about 10%) and save the PACK layout space.

[0027] The top of the crossbeam 1 has two integrally formed extension parts 13, and the two extension parts 13 respectively cover the BMS main board 21 and the BMS slave board 22.

[0028] In this embodiment, since the two extension parts 13 respectively cover the BMS main board 21 and the BMS slave board 22, the BMS main board 21 and the BMS slave board 22 can be protected from being squeezed by the BMS main board 21 and the BMS slave board 22 when the battery box is affected by external forces.

[0029] A plurality of mounting holes 11 are opened at the bottom of the crossbeam 1.

[0030] A plurality of jacks 23 corresponding to the plurality of mounting holes 11 are respectively opened on the BMS main board 21 and the BMS slave board 22, bolts 24 are inserted into the jacks 23, and the upper ends of the bolts 24 penetrate through the top of the crossbeam 1.

[0031] In this embodiment, the setting of the multiple mounting holes 11, jacks 23 and multiple bolts 24 is to respectively install and fix the BMS main board 21 and the BMS slave board 22 in the two mounting grooves 12. The bolt connection method is convenient for disassembly and assembly.

[0032] A plurality of through holes 14 are opened on the outer wall of the crossbeam 1.

[0033] In this embodiment, the setting of the plurality of through holes 14 is to reduce the weight of the crossbeam 1.

[0034] The present utility model also provides a power battery, which includes the above middle crossbeam structure integrated with the BMS assembly and a battery box body. The middle crossbeam structure integrated with the BMS assembly is installed in the middle of the battery box body. The advantages of this solution are as follows: An integrated design is adopted in which the BMS assembly is encapsulated within the crossbeam 1. First, it saves the PACK layout space. The total PACK power can be increased by about 3 kWh, and the energy density in the battery box body is increased by about 3%, meeting the requirements of the vehicle for a higher pure electric cruising range. Second, the original BMS fixed bracket assembly is cancelled, and the cost can be reduced by about 15 yuan per set. Third, compared with the position where the original BMS assembly 2 is arranged at the end of the battery box body, the voltage and temperature sampling circuit (wire) of the battery cells is shortened by half, which can further reduce the cost (reduce the cost of the CCS assembly by about 10%) and save the PACK layout space.

Claims

1. A middle crossbeam structure of an integrated BMS assembly, characterized in that: include: A crossbeam (1), wherein the crossbeam (1) is provided with two installation grooves (12) distributed in a transverse direction; A BMS assembly (2), the BMS assembly (2) comprising a BMS main board (21) and a BMS slave board (22), the BMS main board (21) and the BMS slave board (22) being respectively detachably connected to the two mounting grooves (12).

2. The middle crossbeam structure of an integrated BMS assembly according to claim 1, characterized in that: The top of the crossbeam (1) is provided with two integrally formed extension parts (13), and the two extension parts (13) respectively cover the BMS main board (21) and the BMS slave board (22).

3. The middle crossbeam structure of an integrated BMS assembly according to claim 1, characterized in that: The bottom of the crossbeam (1) is provided with a plurality of mounting holes (11); The BMS main board (21) and the BMS slave board (22) are both provided with a plurality of insertion holes (23) corresponding to the plurality of mounting holes (11), and bolts (24) are inserted into the insertion holes (23), and the upper ends of the bolts (24) penetrate the top of the crossbeam (1).

4. The middle crossbeam structure of an integrated BMS assembly according to claim 1, characterized in that: A plurality of through holes (14) are formed on the outer wall of the crossbeam (1).

5. A power battery, characterized in that: It comprises a middle cross beam structure of an integrated BMS assembly and a battery box according to any one of claims 1 to 4, wherein the middle cross beam structure of the integrated BMS assembly is installed in the middle of the battery box.

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