Power bus-based battery module and battery cluster communication system

Abstract

The utility model discloses a battery module and battery cluster communication system based on a Powerbus, comprising a BMMU board and a BCMU board which are connected through the Powerbus, and a power supply module is connected with the Powerbus; the BMMU board comprises a power supply circuit, a bus communication circuit and a DIDO circuit; the BCMU board comprises a power supply circuit and a bus communication circuit; the power supply circuit is connected with the Powerbus bus, so that power can be taken from the Powerbus bus; the bus communication circuit is used for communicating with a Powerbus bus; and the DIDO circuit realizes signal input and output between the BMMU board and the peripheral as well as between the BMMU board and the BCMU board. According to the utility model, the Powerbus is adopted to replace a 24V power supply line and a 485 or CAN communication line, and two wire harnesses can be saved for each PACK, so that not only are the advantages of simple insulation design and lower cost achieved, but also the material cost and the assembly cost can be saved, and the anti-interference capability is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage systems, specifically relating to a communication system for battery modules and battery clusters based on the Powerbus bus. Background Technology

[0002] With the continuous development of commercial energy storage products, in order to improve the safety of battery packs, a fire suppression system is generally required to be added to the battery pack. The detection and control functions of the fire suppression system in the existing BMS (Battery Management System) are generally achieved by connecting the IO feedback signal of the fire suppression system to the IO pin of the AFE chip or ARM chip of the BMMU (Battery Module Management Unit for Managing Battery Modules), converting it into a communication signal, and then communicating with the BCMU (Battery Cluster Management Unit for Managing Battery Clusters).

[0003] Currently, the detection and control functions of the aforementioned fire protection system can be implemented in the following two ways:

[0004] Option 1 connects the fire protection system's I / O feedback signal to the I / O pins of the BMMU's AFE chip. The BCMU board communicates with the AFE chip on the BMMU board via a daisy chain, with the BMMU's AFE chip's I / O pins serving as the fire protection system's I / O detection. The advantage of this option is the reduced number of cascaded lines: 2 for the daisy chain communication, 2 for the 24V power supply to the fire protection feedback circuit, and 2 for the fire protection feedback signal, totaling 6 lines, reducing assembly steps. However, the disadvantage is that the fire protection system feedback signal and the 24V power supply require reinforced insulation design with the AFE chip. This reinforced insulation design is typically achieved using a high-voltage isolation power supply and a custom optocoupler, which is complex and costly.

[0005] Option 2 connects the IO feedback signal of the fire protection system to the IO pins of the BMMU's ARM chip. The BCMU communicates with the BMMU's ARM chip via 485 or CAN communication, and the IO pins of the BMMU's ARM chip are used for the IO detection of the fire protection system. The advantage of this option is that it separates the IO feedback circuit of the fire protection system from the high-voltage signal part of the AFE chip, eliminating electrical connections and simplifying the system insulation design. However, the disadvantage of this option is that, in addition to the 6 wires mentioned in Option 1, each battery pack requires 2 more 485 or CAN communication wire harnesses. For N packs, this adds 2N wire harnesses, increasing wire harness and assembly costs. Furthermore, the addition of wire harnesses increases the number of connector terminals. Utility Model Content

[0006] This invention is proposed to overcome the shortcomings of the existing scheme 2, which uses the connection between the IO feedback signal of the fire protection system and the IO pin of the ARM chip on the BMMU board, resulting in high material costs for system wiring harnesses and connectors and increased system assembly process costs. Its purpose is to provide a communication system for battery modules and battery clusters based on the Powerbus bus.

[0007] This utility model is achieved through the following technical solution:

[0008] A battery module and battery cluster communication system based on Powerbus bus includes a BMMU board and a BCMU board connected via Powerbus bus, with a power module connected to the Powerbus bus. The BMMU board includes a BMMU board power supply circuit, a BMMU board bus communication circuit, and a BMMU board DIDO circuit. The BCMU board includes a BCMU board power supply circuit and a BCMU board bus communication circuit. The BMMU board power supply circuit and the BCMU board bus communication circuit are respectively connected to the Powerbus bus to draw power from the Powerbus bus. The BMMU board bus communication circuit and the BCMU board bus communication circuit are used for communication between the BMMU board and the Powerbus bus. The BMMU board DIDO circuit realizes signal input and output between the BMMU board and peripherals, as well as between the BMMU board and the BCMU board.

[0009] In the above technical solution, the specific circuit connection of the BMMU board power supply circuit is as follows: the Bus- signal is connected to capacitor C26 and inductor L4 respectively; the other end of capacitor C26 is connected to capacitor C27, pin 4 of rectifier bridge D4, and resistor R9 respectively; the other end of resistor R9 is connected to GND1 signal; the other end of inductor L4 is connected to pin 3 of rectifier bridge D4; the other end of capacitor C27 is connected to Bus+ signal and inductor L3 respectively; the other end of inductor L3 is connected to pin 2 of rectifier bridge D4; pin 2 of rectifier bridge D4 is connected to resistor R8; the other end of resistor R8 is connected in parallel with... Electrolytic capacitors C25, C24, and C23 are connected to pin 1 of power chip U4. Pins 2 and 4 of power chip U4 are connected to GND1. Pin 3 of power chip U4 is connected in parallel with capacitors C20 and C19, and then connected to pin 3 of power chip U5. The other ends of capacitors C19 and C20 are connected to GND1. Pin 1 of power chip U5 is connected to GND1. Pins 2 and 4 of power chip U5 are shorted together and then connected in parallel with capacitors C22 and C21. The other ends of capacitors C21 and C22 are connected to GND1.

[0010] In the above technical solution, the specific circuit connection of the BMMU board bus communication circuit is as follows: the Bus- signal is connected to capacitors C31 and C29, the Bus+ signal is connected to capacitors C34 and C36, the other end of capacitor C31 is connected to the positive terminal of diode D5, the negative terminal of diode D6, resistor R10, resistor R12 and capacitor C30 respectively, and then connected to pin 5 of Powerbus chip U7; the other ends of diodes D5 and D6 are connected to the other end of capacitor C34; the other end of resistor R10 and capacitor C30 is connected to the +5V1 signal, the other end of resistor R12 is connected to the positive terminal of diode D6, and the positive terminal of diode D6 is connected to resistor R14 and capacitor C35 respectively, and then connected to pin 6 of Powerbus chip U7, the other end of resistor R14 and capacitor C35 is connected to the +5V1 signal; the other end of capacitor C29 is connected to pins 1 and 4 of the driven transistor Q4, pin 3 of the driven transistor Q4 is connected to GND1, and the driven transistor... Pin 6 of the transistor is connected to +5V1. After pushing the transistor, pins 2 and 5 are shorted together and then connected to pin 7 of the Powerbus chip U7. The other end of capacitor C36 is connected to pins 1 and 4 of the transistor Q6 after pushing it. Pin 3 of the transistor Q6 is connected to GND1. Pin 6 of the transistor Q6 is connected to +5V1. After pushing the transistor Q6, pins 2 and 5 are shorted together and then connected to pin 4 of the Powerbus chip U7. Pin 1 of the Powerbus chip U7 is connected to the +5V1 power supply and filtered by capacitor C28. The other end of capacitor C28 is connected to GND. Pin 2 of the Powerbus chip U7 is connected to pin 119 of the ARM chip U6. Pin 3 of the Powerbus chip U7 is connected to pin 122 of the ARM chip U6. Pin 17 of the ARM chip U6 is connected to +3.3V and filtered by capacitors C32 and C33. The other ends of capacitors C32 and C33 are connected to GND and then to pin 16 of the ARM chip U6.

[0011] In the above technical solution, the specific circuit connection of the BMMU board DIDO circuit is as follows: pin 10 of the BMMU ARM chip U6 is connected in series with resistor R16. The other end of resistor R16 is connected to capacitor C38, resistor R18, and pin 1 of MOSFET Q18. The other ends of capacitor C38 and resistor R18 are connected to GND1. Pin 3 of MOSFET Q8 is connected to +24V1, pin 2 is connected to resistor R21 and diode D7, and then connected to pin 1 of the 4-pin terminal P3. The other ends of resistor R21 and diode D7 are connected to... GND1, pin 3 of the 4-pin terminal P3 is connected in series with resistor R15. The other end of resistor R15 is connected to capacitor C37, resistor R19 and pin 1 of MOSFET Q7 respectively. The other ends of capacitor C37 and resistor R19 are connected to GND1. Pin 3 of MOSFET Q7 is connected to +24V1, pin 2 is connected to resistor R20, then to resistor R17, and then to pin 12 of BMMU's ARM chip U6. The other end of resistor R20 is connected to GND1. Pin 2 of the 4-pin terminal P3 is connected to GND1, and pin 4 is connected to +24V1.

[0012] In the above technical solution, the composition and connection method of the BCMU board power supply circuit are the same as those of the BMMU board power supply circuit.

[0013] In the above technical solution, the composition and connection method of the BCMU board bus communication circuit are the same as those of the BMMU board bus communication circuit.

[0014] The beneficial effects of this utility model are:

[0015] This invention provides a communication system for battery modules and battery clusters based on the Powerbus bus. It replaces the 24V power supply line and 485 or CAN communication line with the Powerbus bus, saving two wiring harnesses per PACK. This system not only combines the advantages of simple insulation design and lower cost, but also saves material and assembly costs, while enhancing anti-interference capabilities. Applying the Powerbus bus to energy storage systems can reduce the cost of enhanced insulation design, as well as the material costs of wiring harnesses and connectors, and the overall product assembly cost. This pioneering practical application has significant application value. Attached Figure Description

[0016] Figure 1 This is a block diagram of the BMS communication system based on the Powerbus bus of this utility model;

[0017] Figure 2 This is the circuit schematic diagram of the BCMU board in this utility model;

[0018] Figure 3 This is the circuit schematic diagram of the BMMU board in this utility model.

[0019] in:

[0020] 1. BMMU board; 11. BMMU board power supply circuit; 12. BMMU board bus communication circuit; 13. BMMU board DIDO circuit;

[0021] 2. BCMU board; 21. BCMU board power supply circuit; 22. BCMU board bus communication circuit;

[0022] 3. Powerbus bus;

[0023] 4. Power supply module;

[0024] 5. Peripherals.

[0025] For those skilled in the art, other related figures can be obtained from the above figures without any creative effort. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] As shown in Figures 1-3, a battery module and battery cluster communication system based on Powerbus bus includes a BMMU board 1 and a BCMU board 2 connected via Powerbus bus 3, and a power module 4 connected to Powerbus bus 3. The BMMU board 1 includes a BMMU board power supply circuit 11, a BMMU board bus communication circuit 12, and a BMMU board DIDO circuit 13. The BCMU board 2 includes a BCMU board power supply circuit 21 and a BCMU board bus communication circuit 22. The BMMU board power supply circuit 11 and the BCMU board power supply circuit 21 are respectively connected to Powerbus bus 3 to draw power from Powerbus bus 3. The BMMU board bus communication circuit 12 and the BCMU board bus communication circuit 22 are used for communication between BMMU board 1 and BCMU board 2 and Powerbus bus 3. The BMMU board DIDO circuit 13 realizes signal input and output between BMMU board 1 and peripheral device 5, and between BMMU board 1 and BCMU board 2.

[0028] The specific circuit connection of the BMMU board power supply circuit 11 is as follows: the Bus- signal is connected to capacitor C26 and inductor L4 respectively. The other end of capacitor C26 is connected to capacitor C27, pin 4 of rectifier bridge D4 and resistor R9 respectively. The other end of resistor R9 is connected to GND1 signal; the other end of inductor L4 is connected to pin 3 of rectifier bridge D4; the other end of capacitor C27 is connected to Bus+ signal and inductor L3 respectively. The other end of inductor L3 is connected to pin 2 of rectifier bridge D4; pin 2 of rectifier bridge D4 is connected to resistor R8. The other end of resistor R8 is connected in parallel with electrolytic capacitor C25, capacitor C24 and capacitor C23 and then connected to the power supply circuit 11. Pin 1 of power chip U4 is connected to the power supply chip, and the signal is defined as +24V1. Pins 2 and 4 of power chip U4 are connected to GND1. Pin 3 of power chip U4 is connected to pin 3 of power chip U5 after capacitors C20 and C19 are connected in parallel, and the signal is defined as +5V1. The other ends of capacitors C19 and C20 are connected to GND1. Pin 1 of power chip U5 is connected to GND1. Pins 2 and 4 of power chip U5 are shorted together and then connected in parallel with capacitors C22 and C21, and the signal is defined as +3.3V1. The other ends of capacitors C21 and C22 are connected to GND1.

[0029] The specific circuit connection of the BMMU board bus communication circuit 12 is as follows: the Bus- signal is connected to capacitors C31 and C29, the Bus+ signal is connected to capacitors C34 and C36, the other end of capacitor C31 is connected to the positive terminal of diode D5, the negative terminal of diode D6, resistor R10, resistor R12 and capacitor C30 respectively, and then connected to pin 5 of Powerbus chip U7; the other ends of diodes D5 and D6 are connected to the other end of capacitor C34; the other end of resistor R10 and capacitor C30 is connected to the +5V1 signal, the other end of resistor R12 is connected to the positive terminal of diode D6, and the positive terminal of diode D6 is connected to resistor R14 and capacitor C35 respectively, and then connected to pin 6 of Powerbus chip U7, the other end of resistor R14 and capacitor C35 is connected to the +5V1 signal; the other end of capacitor C29 is connected to pins 1 and 4 of transistor Q4 after it is driven, pin 3 of transistor Q4 after it is driven is connected to GND1, and pin 6 of transistor Q4 after it is driven is connected to GND1. Connect +5V1, and after shorting pins 2 and 5 of the transistor, connect to pin 7 of Powerbus chip U7; connect the other end of capacitor C36 to pins 1 and 4 of transistor Q6, connect pin 3 of transistor Q6 to GND1, connect pin 6 of transistor Q6 to +5V1, and after shorting pins 2 and 5 of transistor Q6, connect to pin 4 of Powerbus chip U7; connect pin 1 of Powerbus chip U7 to +5V1 power supply and filter through capacitor C28, with the other end of capacitor C28 connected to GND; connect pin 2 of Powerbus chip U7 to pin 119 of ARM chip U6; connect pin 3 of Powerbus chip U7 to pin 122 of ARM chip U6; connect pin 17 of ARM chip U6 to +3.3V and filter through capacitors C32 and C33, with the other ends of capacitors C32 and C33 connected to GND and then to pin 16 of ARM chip U6.

[0030] The specific circuit connection of the BMMU board DIDO circuit 13 is as follows: Pin 10 of the BMMU ARM chip U6 is connected in series with resistor R16. The other end of resistor R16 is connected to capacitor C38, resistor R18, and pin 1 of MOSFET Q18. The other ends of capacitor C38 and resistor R18 are connected to GND1. Pin 3 of MOSFET Q8 is connected to +24V1, and pin 2 is connected to resistor R21 and diode D7, then connected to pin 1 of the 4-pin terminal P3. The other ends of resistor R21 and diode D7 are connected to GND. 1. Connect pin 3 of the 4-pin terminal P3 to a series resistor R15. Connect the other end of resistor R15 to capacitor C37, resistor R19, and pin 1 of MOSFET Q7. Connect the other ends of capacitor C37 and resistor R19 to GND1. Connect pin 3 of MOSFET Q7 to +24V1. Connect pin 2 to resistor R20, then to resistor R17, and then to pin 12 of the ARM chip U6 of BMMU. Connect the other end of resistor R20 to GND1. Connect pin 2 of the 4-pin terminal P3 to GND1 and pin 4 to +24V1.

[0031] The specific circuit connection of the BMMU board power supply circuit 21 is as follows: the Bus- signal is connected to capacitor C8 and inductor L2 respectively. The other end of capacitor C8 is connected to capacitor C9, pin 4 of rectifier bridge D1 and resistor R2 respectively. The other end of resistor R2 is connected to GND1 signal. The other end of inductor L2 is connected to pin 3 of rectifier bridge D1. The other end of capacitor C9 is connected to Bus+ signal and inductor L1 respectively. The other end of inductor L1 is connected to pin 2 of rectifier bridge D1. Pin 2 of rectifier bridge D1 is connected to resistor R1. The other end of resistor R1 is connected in parallel with electrolytic capacitor C7, capacitor C6 and capacitor C5 and then connected to... Connect the signal to pin 1 of power chip U1 and define it as +24V. Connect pins 2 and 4 of power chip U1 to GND1. Connect pin 3 of power chip U1 with capacitors C2 and C1 in parallel and then connect it to pin 3 of power chip U2, defining the signal as +5V. Connect the other ends of capacitors C1 and C2 to GND1. Connect pin 1 of power chip U2 to GND1. Connect pins 2 and 4 of power chip U2 to GND1 and then connect them in parallel with capacitors C3 and C4, defining the signal as +3.3V. Connect the other ends of capacitors C3 and C4 to GND1.

[0032] The specific circuit connection of the BMMU board bus communication circuit 12 is as follows: the Bus- signal is connected to capacitors C13 and C11, the Bus+ signal is connected to capacitors C16 and C18, the other end of capacitor C13 is connected to the positive terminal of diode D2, the negative terminal of diode D3, resistor R3, resistor R5 and capacitor C12 respectively, and then connected to pin 5 of Powerbus chip U8; the other ends of diodes D2 and D3 are connected to the other end of capacitor C16; the other ends of resistor R3 and capacitor C12 are connected to the +5V1 signal, the other end of resistor R5 is connected to the positive terminal of diode D3, and the positive terminal of diode D3 is connected to resistor R7 and capacitor C17 respectively, and then connected to pin 6 of Powerbus chip U8, the other ends of resistor R7 and capacitor C17 are connected to the +5V1 signal; the other end of capacitor C11 is connected to pins 1 and 4 of transistor Q1 after it has been driven, pin 3 of transistor Q1 after it has been driven is connected to GND1, and pin 6 of transistor Q1 after it has been driven is connected to... +5V; pins 2 and 5 of transistor Q1 are shorted together and then connected to pin 7 of Powerbus chip U8; the other end of capacitor C18 is connected to pins 1 and 4 of transistor Q3; pin 3 of transistor Q3 is connected to GND1; pin 6 of transistor Q3 is connected to +5V; pins 2 and 5 of transistor Q3 are shorted together and then connected to pin 4 of Powerbus chip U8; pin 1 of Powerbus chip U8 is connected to +5V power supply and filtered by capacitor C10; the other end of capacitor C10 is connected to GND; pin 2 of Powerbus chip U8 is connected to pin 119 of ARM chip U3; pin 3 of Powerbus chip U8 is connected to pin 122 of ARM chip U3; pin 17 of ARM chip U3 is connected to +3.3V and filtered by capacitors C14 and C15; the other ends of capacitors C14 and C15 are connected to GND and then to pin 16 of ARM chip U3.

[0033] Example 1

[0034] This utility model provides a battery module and battery cluster communication system based on Powerbus bus. In this embodiment, a fire protection system is used as an example to further describe the working process and principle of the battery module and battery cluster communication system based on Powerbus bus.

[0035] In this embodiment, the BCMU communicates with the BMMU's ARM chip via the Powerbus bus. The IO pins of the ARM chip are used for IO detection of the fire protection system. At the same time, the 24V power supply for the fire protection system's IO feedback circuit is also provided by the Powerbus bus.

[0036] Currently, in addition to the necessary fire feedback detection, the BMMU also reserves one DO output as a remote control signal to control external devices in the PACK. For ease of understanding and explanation, these two parts are referred to as the DIDO circuit. The fire feedback signal is connected to the BMMU's DI signal, and the DO signal is connected to the external device.

[0037] The BMMU's DIDO circuit is connected to the Powerbus bus via terminals on the Bus+ and Bus- signal lines (the Bus+ and Bus- signal lines are the Powerbus bus for system power supply and communication). Signal reception, transmission, and power supply are achieved through the Powerbus bus. Each BMMU is assigned a unique address via software, and the BCMU controls and monitors BMMUs with different addresses via the Powerbus bus.

[0038] The BMMU's DIDO circuit and BCMU are connected to the Powerbus bus, and they draw power from the bus in the same way. Taking the BMMU power supply as an example, the Bus+ and Bus- buses are filtered by capacitor C27 for differential mode filtering, and then filtered by inductors L3 and L4 respectively to isolate the bus carrier signal. After rectification by rectifier bridge D4, a +24V1 power supply is formed to power the DIDO circuit. Capacitor C25 and resistors R8 and R9 form a filter circuit to filter out interference in the power supply section and reduce interference on the bus system signal lines. The +24V1 power supply is filtered by capacitors C24 and C23 and then supplied to power chip U4. U4 performs DC-DC step-down to convert it to +5V1 power to power Powerbus chip U7. The +5V1 power supply is then processed by LDO chip U5 to generate a +3.3V1 power supply, which powers ARM chip U6.

[0039] Based on the actual operating status of the energy storage system, if the BCMU needs to enable the DO signal in a certain PACK, the ARM chip U3 on the BCMU board sends the BMMU address plus the DO enable control command through pin 119. This command is converted by the Powerbus chip U8, and then flows through the powerbus chip U8's pins 7 and 4, after passing through transistors Q1 and Q3 (Q1 and Q3 increase the signal's driving capability), and then through capacitors C11 and C18 for isolation before flowing to the Bus+ and Bus- buses. This signal reaches all devices on the bus through the Bus+ and Bus- buses.

[0040] Taking one of the BMMUs as an example, the signal is isolated by capacitors C31 and C34 on the BMMU board, then clamped by diodes D5 and D6 connected in reverse parallel. Resistors R10 and R12 are used to adjust the number of bus nodes, and resistor R14 is a pull-up resistor. After being filtered by capacitors C30 and C35, the signal enters the Powerbus chip U7. The Powerbus chip U7 converts the received signal into a 485 signal and sends it to the BMMU's ARM chip U6 via pin 3. Pin 122, the ARM chip U6 parses the received instructions. If the instruction is addressed to itself, it will take action according to the received control command, causing pin 10 of the Powerbus chip U7 to go high. This signal is divided by resistors R16 and R18, and the voltage between pin 1 of MOSFET Q8 and GND1 is 3.267V. This voltage is greater than the turn-on voltage of MOSFET Q8, so MOSFET Q8 is turned on. The DO1 signal is +24V1 at this time. The 24V1+ signal is clamped by TVS bidirectional diode D7 and then sent to the external device to turn on the device.

[0041] Once the system detects a fire-related anomaly, the external fire-fighting equipment will automatically activate, and the DI1 signal will be pulled high to +24V. This voltage is divided by resistors R15 and R19, and the voltage between pin 1 of MOSFET Q7 and GND1 is 12V, reaching the turn-on voltage of MOSFET Q7. The DI1_DET signal is pulled high to 3.3V, indicating that the fire-fighting has started successfully. After being filtered by resistor R17 and capacitor C39, the signal is sent to pin 12 of the ARM chip U6 of the BMMU. (To disable the fire alarm, pin 10 of the BMMU's ARM chip U6 is pulled low, MOSFET Q8 is off, DO1 is low, DI1 is low, Q7 is off, and the DI1_DET signal is low.) The BMMU's ARM chip U6 sends the fire alarm detection status to the Powerbus chip U7 via pin 119. The Powerbus chip U7 then sends the signal to the Bus+ and Bus- buses via pins 7 and 4, after driving transistors Q4 and Q6 to improve the drive capability, and after isolation by capacitors C29 and C36. The bus signal is then isolated by capacitors C13 and C16 on the BCMU board, and after bus clamping protection by diodes D2 and D3, it is filtered by capacitors C17 and C12 before being sent to pins 5 and 6 of the Powerbus chip U8. After conversion, it is sent to pin 122 of U3. The ARM chip U3 on the BCMU board analyzes the instructions to determine whether the fire alarm equipment in the PACK has been activated.

[0042] The applicant declares that the above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.

Claims

1. A Powerbus bus-based battery module and battery cluster communication system, characterized by: The application relates to a Powerbus bus (3) connected BMMU board (1) and BCMU board (2), and a power module (4) connected with the Powerbus bus (3); the BMMU board (1) comprises a BMMU board power supply circuit (11), a BMMU board bus communication circuit (12) and a BMMU board DIDO circuit (13); the BCMU board (2) comprises a BCMU board power supply circuit (21) and a BCMU board bus communication circuit (22); the BMMU board power supply circuit (11) and the BCMU board power supply circuit (21) are connected with the Powerbus bus (3) respectively to realize power taking from the Powerbus bus (3); the BMMU board bus communication circuit (12) and the BCMU board bus communication circuit (22) are used for communication between the BMMU board (1) and the BCMU board (2) and the Powerbus bus (3); and the BMMU board DIDO circuit (13) realizes signal input and output between the BMMU board (1) and peripherals (5) and between the BMMU board (1) and the BCMU board (2).

2. The Powerbus-based battery module and battery pack communication system of claim 1, wherein: The specific circuit connection of the BMMU board power supply circuit (11) is as follows: Bus- signals are connected with capacitors C26 and inductors L4 respectively, one end of the capacitor C26 is connected with capacitors C27, the fourth pin of a rectifier bridge D4 and a resistor R9 respectively, the other end of the resistor R9 is connected with a GND1 signal; the other end of the inductor L4 is connected with the third pin of the rectifier bridge D4, the other end of the capacitor C27 is connected with a Bus+ signal and an inductor L3 respectively, the other end of the inductor L3 is connected with the second pin of the rectifier bridge D4; the second pin of the rectifier bridge D4 is connected with a resistor R8, the other end of the resistor R8 is connected with an electrolytic capacitor C25, a capacitor C24 and a capacitor C23 in parallel, and then connected with the first pin of a power supply chip U4, the second pin and the fourth pin of the power supply chip U4 are connected with GND1, the third pin of the power supply chip U4 is connected with a capacitor C20 and a capacitor C19 in parallel, and then connected with the third pin of a power supply chip U5, the other end of the capacitor C19 and the capacitor C20 is connected with GND1; the first pin of the power supply chip U5 is connected with GND1, the second pin and the fourth pin of the power supply chip U5 are connected with a capacitor C22 and a capacitor C21 in parallel after being connected together, and the other end of the capacitor C21 and the capacitor C22 is connected with GND1.

3. The Powerbus-based battery module and battery pack communication system of claim 1, wherein: The specific circuit connection of the BMMU board bus communication circuit (12) is: the Bus- signal is connected to the capacitor C31 and the capacitor C29, the Bus+ signal is connected to the capacitor C34 and the capacitor C36, the other end of the capacitor C31 is connected to the anode of the diode D5, the cathode of the diode D6, the resistor R10, the resistor R12 and the capacitor C30, and then connected to the 5 pin of the Powerbus chip U7; the other end of the diode D5 and the diode D6 is connected to the other end of the capacitor C34; the other end of the resistor R10 and the capacitor C30 is connected to the +5V1 signal, the other end of the resistor R12 is connected to the anode of the diode D6, and the anode of the diode D6 is connected to the resistor R14 and the capacitor C35, and then connected to the 6 pin of the Powerbus chip U7; the other end of the capacitor C29 is connected to the 1 pin and the 4 pin of the push complete transistor Q4, the 3 pin of the push complete transistor Q4 is connected to the GND1, the 6 pin of the push complete transistor is connected to the +5V1, the 2 pin and the 5 pin of the push complete transistor are shorted together and then connected to the 7 pin of the Powerbus chip U7; the other end of the capacitor C36 is connected to the 1 pin and the 4 pin of the push complete transistor Q6, the 3 pin of the push complete transistor Q6 is connected to the GND1, the 6 pin of the push complete transistor Q6 is connected to the +5V1, the 2 pin and the 5 pin of the push complete transistor Q6 are shorted together and then connected to the 4 pin of the Powerbus chip U7; the 1 pin of the Powerbus chip U7 is connected to the +5V1 power supply and filtered through the capacitor C7, the other end of the capacitor C7 is connected to the GND, the 2 pin of the Powerbus chip U7 is connected to the 119 pin of the ARM chip U6, the 3 pin of the Powerbus chip U7 is connected to the 122 pin of the ARM chip U6, the 17 pin of the ARM chip U6 is connected to the +3.3V and filtered through the capacitor C32 and the capacitor C33, the other end of the capacitor C32 and the capacitor C33 is connected to the GND and then connected to the 16 pin of the ARM chip U6.

4. The Powerbus-based battery module and battery pack communication system of claim 1, wherein: The specific circuit connection of the BMMU board DIDO circuit (13) is: the 10 pin of the ARM chip U6 of the BMMU is connected in series with the resistor R16, the other end of the resistor R16 is connected to the capacitor C38, the resistor R18 and the 1 pin of the MOS tube Q18, the other end of the capacitor C38 and the resistor R18 is connected to the GND1, the 3 pin of the MOS tube Q8 is connected to the +24V1, the 2 pin is connected to the resistor R21 and the diode D7, and then connected to the 1 pin of the terminal P3 of the 4PIN, the other end of the resistor R21 and the diode D7 is connected to the GND1, the 3 pin of the terminal P3 of the 4PIN is connected in series with the resistor R15, the other end of the resistor R15 is connected to the capacitor C37, the resistor R19 and the 1 pin of the MOS tube Q7, the other end of the capacitor C37 and the resistor R19 is connected to the GND1, the 3 pin of the MOS tube Q7 is connected to the +24V1, the 2 pin is connected to the resistor R20, then connected to the resistor R17 and then connected to the 12 pin of the ARM chip U6 of the BMMU, the other end of the resistor R20 is connected to the GND1, the 2 pin of the terminal P3 of the 4PIN is connected to the GND1, and the 4 pin is connected to the +24V1.

5. The Powerbus-based battery module and battery pack communication system of claim 1, wherein: The composition and connection mode of the BCMU board power supply circuit (21) are the same as those of the BMMU board power supply circuit (11).

6. The Powerbus-based battery module and battery pack communication system of claim 1, wherein: The composition and connection mode of the BCMU board bus communication circuit (22) are the same as those of the BMMU board bus communication circuit (12).

Images