Tubular BMS structure

Abstract

The utility model relates to the technical field of lithium battery management systems, in particular to a tubular BMS structure which comprises four PCBs, L-shaped copper sheets and L-shaped extension socket connectors, the four PCBs comprise a charging board, a discharging board, an AFE board and an MCU board, the charging board, the discharging board, the AFE board and the MCU board are vertically arranged and assembled into a tubular structure along the side edge, the charging board and the discharging board are electrically connected through the L-shaped copper sheets, and the L-shaped extension socket connectors are connected with the charging board through the L-shaped copper sheets. The discharging board and the AFE board, the charging board and the MCU board, and the AFE board and the MCU board are electrically connected through L-shaped extension socket connectors. Compared with the prior art, the tubular structure is formed by the four PCBs in a three-dimensional assembly mode, the structure is compact, and the board area of the BMS is effectively reduced; all the components are located in the cavity formed by the four PCBs, glue can be conveniently poured into the cavity, the effect of improving the waterproof performance and heat dissipation performance of the BMS can be achieved by adopting a small glue pouring amount, and the use requirements in severe environments such as collision, vibration and humidity are met.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery management systems, and specifically relates to a tubular BMS structure. Background Art

[0002] With the development trend of electric bicycles towards being lightweight and compact, the volume requirements for lithium battery PACKs are also getting higher and higher.

[0003] Traditional lithium battery management systems (BMS) are all flat designs, and all components are laid flat on the PCB board. Such a structure results in a relatively large board area for the BMS, requiring a large space to place the BMS, and unable to meet the requirement of reducing the volume of the lithium battery PACK.

[0004] Therefore, it is necessary to design a tubular BMS structure to reduce the board area of the BMS, thereby reducing the volume of the lithium battery PACK and meeting the development needs of electric bicycles towards being lightweight and compact. Summary of the Invention

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art, and provides a tubular BMS structure to reduce the board area of the BMS, thereby reducing the volume of the lithium battery PACK and meeting the development needs of electric bicycles towards being lightweight and compact.

[0006] To achieve the above purpose, the utility model is a tubular BMS structure, which includes 4 PCB boards, L-shaped copper sheets, and L-shaped socket connectors. The 4 PCB boards include a charging board, a discharging board, an AFE board, and an MCU board. The charging board, the discharging board, the AFE board, and the MCU board are vertically arranged and assembled into a tubular structure along the side edges. The charging board and the discharging board are electrically connected by an L-shaped copper sheet. The discharging board and the AFE board, the charging board and the MCU board, and the AFE board and the MCU board are all electrically connected by L-shaped socket connectors. The components on the charging board, the discharging board, the AFE board, and the MCU board are located in the cavity of the tubular structure.

[0007] A potting filling layer is provided in the cavity of the tubular structure.

[0008] The components on the charging board include charging MOS, P-pads, and C-pads.

[0009] The components on the discharging board include discharging MOS, current sampling resistors, and B-pads.

[0010] The components on the AFE board include voltage and temperature sampling socket connectors, AFE chips, B+ pads, fuses, and P+ pads.

[0011] The traces between the B-pad, P-pad, C-pad, B+ pad, and P+ pad are located inside the cavity of the tubular structure. One end of the five power lines is connected to the B-pad, P-pad, C-pad, B+ pad, and P+ pad respectively, and the other ends of the five power lines lead out from the bottom of the tubular structure.

[0012] The model of the AFE chip is SH367309.

[0013] The components on the MCU board include a communication lamp board socket, a communication circuit module, an MCU, and a power supply.

[0014] One end of the four signal lines is connected to the voltage and temperature sampling socket and the communication lamp board socket respectively, and the other ends of the four signal lines lead out from the top of the tubular structure.

[0015] The model of the MCU is APM32F072CBT6, and the model of the power supply is MP4581.

[0016] Compared with the prior art, in the present utility model, the 4 PCB boards form a tubular structure through a three-dimensional assembly method, with a compact structure, effectively reducing the board area of the BMS; all components are located inside the cavity formed by the 4 PCB boards, facilitating potting inside the cavity. By using a smaller amount of potting material, the waterproofness and heat dissipation of the BMS can be improved, meeting the usage requirements in harsh environments such as bumps, vibrations, and humidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a top view of the present utility model.

[0018] Figure 2 is a side view of the present utility model.

[0019] Figure 3 is a schematic diagram of the 4 PCB boards of the present utility model unfolded. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described below in conjunction with the accompanying drawings.

[0021] See Figure 1 、 Figure 2, the utility model is a tubular BMS structure, which includes 4 PCB boards, L-shaped copper sheets, and L-shaped socket connectors. The 4 PCB boards include a charging board 1, a discharging board 2, an AFE board 3, and an MCU board 4. The charging board 1, the discharging board 2, the AFE board 3, and the MCU board 4 are vertically arranged and assembled into a tubular structure 7 along the side. The charging board 1 and the discharging board 2 are electrically connected by an L-shaped copper sheet 5. The discharging board 2 and the AFE board 3, the charging board 1 and the MCU board 4, and the AFE board 3 and the MCU board 4 are all electrically connected by L-shaped socket connectors 6. The components on the charging board 1, the discharging board 2, the AFE board 3, and the MCU board 4 are located in the cavity of the tubular structure 7.

[0022] Since a large current is required between the charging board 1 and the discharging board 2, the L-shaped copper sheet 5 is used for connection. There are only signals between the discharging board 2 and the AFE board 3, the charging board 1 and the MCU board 4, and the AFE board 3 and the MCU board 4, so the L-shaped socket connector 6 can be used.

[0023] There is a potting filling layer in the cavity of the tubular structure 7 to strengthen the structure and prevent water, thereby improving the waterproofness and heat dissipation of the BMS. After measurement, the potting amount for the potting filling layer is less than that of the traditional BMS.

[0024] See Figure 3 , the components on the charging board 1 include a charging MOS 11, a P-pad 12, and a C-pad 13.

[0025] The components on the discharging board 2 include a discharging MOS 21, a current sampling resistor 22, and a B-pad 23.

[0026] The components on the AFE board 3 include a voltage and temperature sampling socket 31, an AFE chip 32, a B+ pad 33, a fuse 34, and a P+ pad 35. The model of the AFE chip 32 is SH367309.

[0027] The components on the MCU board 4 include a communication light board socket 41, a communication circuit module 42, an MCU 43, and a power supply 44. The model of the MCU 43 is APM32F072CBT6, and the model of the power supply 44 is MP4581.

[0028] The quantity of each component of the 4 PCB boards and the specific connections between the components can be adjusted according to actual usage requirements. If it is necessary to add other functional circuit modules 45, they can be placed on the MCU board 4.

[0029] See Figure 2, the traces between the B-pad 23, P-pad 12, C-pad 13, B+ pad 33, and P+ pad 35 are located within the cavity of the tubular structure 7. One end of each of the five power lines 8 is connected to the B-pad 23, P-pad 12, C-pad 13, B+ pad 33, and P+ pad 35 respectively, and the other ends of the five power lines 8 extend out from the bottom of the tubular structure 7. One end of each of the four signal lines 9 is connected to the voltage and temperature sampling socket 31 and the communication lamp board socket 41 respectively, and the other ends of the four signal lines 9 extend out from the top of the tubular structure 7.

[0030] Among them, the five power lines 8 are the B-power line, P-power line, C-power line, B+ power line, and P+ power line, and the four signal lines 9 are the voltage sampling line, NTC line, communication line, and lamp board line.

[0031] The four PCB boards of the present utility model form a tubular structure through a three-dimensional assembly method, with a compact structure, effectively reducing the board area of the BMS; all components are located within the cavity formed by the four PCB boards, facilitating potting within the cavity. By using a relatively small amount of potting material, the waterproofness and heat dissipation of the BMS can be improved, meeting the usage requirements in harsh environments such as bumps, vibrations, and humidity.

Claims

1. A tubular BMS structure, comprising four PCB boards, L-shaped copper sheets, and L-shaped socket connectors, characterized in that: The four PCBs include a charging board (1), a discharging board (2), an AFE board (3), and an MCU board (4). The charging board (1), the discharging board (2), the AFE board (3), and the MCU board (4) are vertically arranged and assembled along the sides into a tubular structure (7). The charging board (1) and the discharging board (2) are electrically connected by an L-shaped copper sheet (5). The discharging board (2) and the AFE board (3), the charging board (1) and the MCU board (4), and the AFE board (3) and the MCU board (4) are all electrically connected by L-shaped socket connectors (6). The components on the charging board (1), the discharging board (2), the AFE board (3), and the MCU board (4) are located in the cavity of the tubular structure (7).

2. The tubular BMS structure according to claim 1, wherein: There is a potting filling layer in the cavity of the tubular structure (7).

3. A tubular BMS structure according to claim 1, wherein: The components on the charging board (1) include a charging MOS (11), a P-pad (12), and a C-pad (13).

4. A tubular BMS structure according to claim 1, characterized in that: The components on the discharging board (2) include a discharging MOS (21), a current sampling resistor (22), and a B-pad (23).

5. A tubular BMS structure according to claim 1, wherein: The components on the AFE board (3) include a voltage and temperature sampling socket (31), an AFE chip (32), a B+ pad (33), a fuse (34), and a P+ pad (35).

6. A tubular BMS structure according to claim 3 or 4 or 5, characterized in that: The traces between the B-pad (23), the P-pad (12), the C-pad (13), the B+ pad (33), and the P+ pad (35) are located in the cavity of the tubular structure (7). One end of five power lines (8) is respectively connected to the B-pad (23), the P-pad (12), the C-pad (13), the B+ pad (33), and the P+ pad (35). The other ends of the five power lines (8) lead out from the bottom of the tubular structure (7).

7. A tubular BMS structure according to claim 5, wherein: The model of the AFE chip (32) is SH367309.

8. A tubular BMS structure according to claim 1, characterized in that: The components on the MCU board (4) include a communication light board socket (41), a communication circuit module (42), an MCU (43), and a power supply (44).

9. A tubular BMS structure according to claim 5 or 8, characterized in that: One end of four signal lines (9) is respectively connected to the voltage and temperature sampling socket (31) and the communication light board socket (41). The other ends of the four signal lines (9) lead out from the top of the tubular structure (7).

10. A tubular BMS structure according to claim 8, characterized in that: The model of the MCU (43) is APM32F072CBT6, and the model of the power supply (44) is MP4581.

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