WO2011134303A1

WO2011134303A1 - Management system for lithium battery

Info

Publication number: WO2011134303A1
Application number: PCT/CN2011/071266
Authority: WO
Inventors: 朴昌浩; 张友群; 肖利华; 王进; 苏岭; 周安健; 任勇
Original assignee: 重庆长安汽车股份有限公司
Priority date: 2010-04-30
Filing date: 2011-02-24
Publication date: 2011-11-03
Also published as: BR112012027200A2; CN101834457B; CN101834457A

Abstract

The invention relates to a management system for a lithium battery, which comprises a microprocessor control unit (MCU) module (11), a power module (12), a total voltage acquisition module (122), a current acquisition module (121), an insulation detection module (123), a relay control and diagnosis module (124). The microprocessor control unit module (11) receives, analyzes and processes the signals sent from the total voltage acquisition module (122), the current acquisition module (121), the insulation detection module (123) and a battery module monitoring unit (13), then sends the processed signals to an electronic control system and receives the signals sent from the electronic control system, then sends control signals to the relay control and diagnosis module (124) after comprehensively processing the signals. The system of the invention can monitor and control the state of the lithium battery system, adequately exert the performance of the battery system, guarantee safe and reliable operation of the lithium battery system.

Description

Lithium battery management system The present application claims priority to Chinese Patent Application No. 201010162444.7, entitled "A Lithium Battery Management System", filed on April 30, 2010, the entire contents of which are incorporated by reference. Combined in this application.

Technical field

The invention belongs to the field of management systems for vehicle power battery systems, and in particular relates to a management system for lithium batteries.

Background technique

With the global awareness of energy conservation and environmental protection, the development of new energy vehicles has gradually expanded, and the power battery system is a key part of new energy vehicles. The types of power batteries currently used in new energy vehicles are: lead-acid batteries, nickel-metal hydride batteries, nickel-cadmium batteries and lithium batteries. Lithium batteries have been widely used in the field of new energy vehicles because of their small size, high energy density, long storage life, no memory effect, high voltage and low self-discharge rate.

In order to ensure the safe operation of the lithium battery system and give full play to the performance of the lithium battery system, a special management system must be set up to monitor the working status of the lithium battery in real time and to control it reasonably and effectively. This management system needs to realize the real-time monitoring of the charging and discharging current of the lithium battery, the battery temperature, the cell voltage, the total voltage of the battery system, and the insulation state, as well as calculating the capacity of the battery system, and transmitting the data to other electronic control in real time. System, and with other electronic control systems for the management of lithium battery systems.

In the prior art, the technology of the lithium battery management system still has the following shortcomings: 1. The distributed method is used to perform a single board-type management of the lithium battery module group, which causes the management system to be large and complicated, and wastes space. And the cost is high, the reliability is poor, and it is not conducive to practical application.

Second, the lithium battery system insulation performance detection is not perfect, because the voltage of the power battery system is high, if the insulation performance of the lithium battery system is not detected in real time, it will bring great damage to the whole vehicle and personal safety. danger.

Third, the high-voltage relay of the lithium battery system does not add any protection diagnosis and treatment, so that the working state of the high-voltage relay cannot be feedback in time, resulting in safety hazards in the power battery system and the whole vehicle. Summary of the invention

In order to solve the above problems, the present invention provides a lithium battery management system, real-time lithium battery system The status is monitored and managed to ensure the performance and safety of the lithium battery system.

The invention provides a lithium battery management system, and the lithium battery management system comprises: a microprocessor module, a power module, a total voltage acquisition module, a current collection module, an insulation detection module, a relay control and a diagnosis module;

The power module provides a normal working voltage for the microprocessor module, the current collecting module, the total voltage collecting module, the insulation detecting module, the relay control and the diagnostic module, respectively;

The insulation detecting module is connected to the microprocessor module to perform real-time monitoring on the insulation state of the lithium battery system. When the insulation performance of the lithium battery system fails to meet the design requirements, the microprocessor module performs corresponding processing;

The relay control and diagnosis module is connected to the microprocessor module, receives the control signal of the microprocessor module, controls the closing and opening of the high voltage relay, thereby controlling whether the lithium battery system is externally powered, and simultaneously the high voltage relay The status is diagnosed, and the status information of the high voltage relay is fed back to the microprocessor module for processing;

The total voltage collecting module and the current collecting module are respectively connected to the microprocessor module, collect the total voltage and the working current of the lithium battery system, and send the collected data to the microprocessor module;

The battery module monitoring unit is respectively connected to the microprocessor module, performs voltage collection, equalization and temperature collection on the lithium battery cell, and transmits the collected data to the microprocessor module; the microprocessor module receives The signal sent by the total voltage collecting module, the current collecting module, the insulation detecting module and the battery module monitoring unit is analyzed and processed, and the processed signal is sent to the electronic control system, and the signal sent by the electronic control system is received, and the signal is integrated. After processing, a control signal is sent to the relay control and diagnostic module.

Preferably, the system further includes a non-volatile memory module coupled to the microprocessor module for non-volatile storage and reading of status information of the lithium battery system.

Advantageously, the system further includes a CAN transceiver module coupled to the microprocessor module for transmitting the processed signal of the microprocessor module to the electronic control system.

Preferably, the system further comprises a handshake signal transceiver module connected to the microprocessor module; the handshake signal transceiver module is configured to diagnose a serious fault of the lithium battery management system and the vehicle requiring an emergency shutdown system. Preferably, the relay control and diagnosis module receives the control signal sent by the microprocessor module, and the FET pre-drives the chip and the FET to complete the driving control of the high voltage relay of the main circuit of the lithium battery system, and controls the high voltage. The closing and opening of the relay;

Each driving channel of the FET pre-drive chip independently detects a switching state of the relay, a short circuit state of the open circuit of the relay, and a short circuit of the power supply, and transmits the state of each channel to the microprocessor module, through the micro Signals between the processor modules are bidirectionally transmitted, the relays are controlled and the status of the relays is diagnosed.

Preferably, the circuit of the relay control and diagnosis module is specifically that the four input terminals IN0, IN1, IN2, and IN3 of the FET pre-drive chip V2 receive the control signal sent by the microprocessor module, and the FET is pre-processed. The output terminals OUT0, OUT1, OUT2, and OUT3 of the driving chip V2 are respectively connected to the gates of the four FETs Q1, Q2, Q3, and Q4, and the sources of the four FETs Q1, Q2, Q3, and Q4 are connected to the circuit ground. The drains of the four FETs Q1, Q2, Q3, and Q4 are respectively connected to the DRAIN0, DRAIN1, DRAIN2, and DRAIN3 pins of the pre-driver chip V2; the positive of the four diodes D1, D2, D3, and D4 The bias is respectively connected to the drains of the four FETs Q1, Q2, Q3, and Q4, and the reverse biases of the four diodes D1, D2, D3, and D4 are respectively connected to the power source VCC.

Preferably, the circuit of the insulation detecting module is specifically: a resistor R1 and a resistor R2 are connected in series between the total positive of the battery system and the total negative of the battery system; one end of the resistor R3 is connected to the resistor R1 and the resistor R2, and the other end of the resistor R3 is connected with the diode D5. Reverse bias, diode D6 is forward biased; diode D5 is forward biased through resistor R4 to the input terminal IN A of the detection unit V3, and is connected in reverse bias with the Zener diode D7 through the resistor R15; The bias is connected to the input terminal IN B of the detecting unit V3 through the resistor R4, and is connected in reverse bias with the Zener diode D7 through the resistor R16;

The resistor R9 is connected to the circuit power supply VCC, the other end of the resistor R9 is connected in series with the resistor R8, and the other end of the resistor R8 is connected to the reverse bias of the Zener diode D7. The Zener diode D7 is forward biased and connected to the circuit ground. The resistor R17 is connected to the circuit power supply VCC, the other end of the resistor R17 is connected in reverse bias with the Zener diode D7; the voltage dividing signal generated by the resistor R8 and the resistor R9 is input to the input terminal IN C of the detecting unit V3;

The voltage signal of the output terminal OUT A of the detecting unit V3 is input to the input terminal IN D of the detecting unit V3 through the resistor R7; the voltage signal of the output terminal OUT A of the detecting unit V3 is input to the detecting list through the resistor R6. Yuan V3 input terminal IN A;

The output terminal OUT B of the detecting unit V3 is an insulation detecting output; the output terminal OUT B of the detecting unit V3 is connected to the resistor R10-terminal, and the other end of the resistor R10 is connected to the light-emitting diode D8. When the lithium battery system is not reliably separated from the whole vehicle, The output terminal OUT B of the detecting unit V3 outputs a high level signal to the microprocessor module, and simultaneously drives the light emitting diode D8 through the resistor R10 to indicate an insulation fault.

Preferably, a plurality of lithium battery cells are connected in series to form a battery module group; the battery module monitoring unit collects the voltage of each lithium battery cell, and transmits the collected lithium battery cell voltage to the Microprocessor module.

The battery module monitoring unit analyzes the voltage of each battery cell, calculates an average value of the lithium battery cell voltages in each module, and equalizes the cells whose voltage is higher than the average value.

Preferably, the equalization adopts a manner of resistance energy consumption.

Preferably, the implementation circuit of the battery module monitoring unit is specifically:

The positive pole of the battery cell is connected to the Cn of the monitoring unit V4, and the negative pole is connected to the Cn-1 of the monitoring unit V4, and the voltage of the battery cell can be collected and calculated. When the cell voltage is too high, the Sn of the monitoring unit V4 is equalized. The signal drives the MOS transistor Q5 to conduct. The source of the MOS transistor Q5 is connected to the positive electrode of the single cell, the gate of the MOS transistor Q5 is connected to the Sn of the monitoring unit V4 through the resistor R11, the drain of the MOS transistor Q5 is connected to the terminal of the resistor R12, and the other end of the resistor R12 is connected to the negative terminal of the battery. The connected circuit forms a discharge equalization process for the excessively high voltage single cell by means of the energy consumption of the resistor R12. Diode D is connected to the source and gate of MOS transistor Q5.

Preferably, the microprocessor module, the current collecting module, the total voltage collecting module, the insulation detecting module, the relay control and the diagnostic module are integrated on one circuit board.

The advantages of the present invention over the prior art are:

The invention is a centralized lithium battery management system capable of detecting the insulation state of a lithium battery system in real time. The insulation fault signal is reported when the insulation performance does not meet the design requirements, and the corresponding safety treatment can be made.

Further, each module of the system of the present invention can be integrated in a circuit board, has a single structure, and saves a large space for the whole vehicle, has strong anti-interference ability and enhanced reliability.

Further, the present invention can provide a high voltage operation to the lithium battery system by controlling the relay. Force, and can feedback the working status of the relay, diagnose the fault of the relay itself, and ensure the safe operation of the lithium battery system.

The lithium battery management system of the invention can perform dynamic collection of the lithium battery system in real time, communicate with the whole vehicle through the communication network, thereby performing a series of processing measures such as equalization and power evaluation on the lithium battery system to manage the lithium battery system.

DRAWINGS

1 is a block diagram showing the overall structure of a lithium battery management system according to the present invention;

2 is a schematic diagram of the principle of the relay control and diagnosis module 124 of the lithium battery management system of the present invention;

3 is a schematic diagram of the principle of the insulation detection module 123 of the lithium battery management system according to the present invention; FIG. 4 is a schematic diagram of the principle of the battery module monitoring unit 13 of the lithium battery management system according to the present invention. detailed description

In order to facilitate the understanding of those skilled in the art, the lithium battery management system will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 1, the figure is a block diagram of the overall structure of a lithium battery management system according to the present invention.

The lithium battery management system of the present invention comprises: an MCU (micro processing) module 11, a power module 12, a total voltage collecting module 122, a current collecting module 121, an insulation detecting module 123, a relay control and diagnostic module 124, and a battery module monitoring unit. 13.

The battery module monitoring unit 13 may include a first battery module monitoring unit 131, a Nth battery module monitoring unit 13N, and a total of N battery module monitoring units.

The power module 12 and the MCU (microprocessor) module 11, the current collection module 121, the total voltage acquisition module 122, the insulation detection module 123, the relay control and diagnosis module 124, the handshake signal transceiver module 125, the CAN transceiver module The 126 is connected to provide a normal working voltage for the above modules, thereby ensuring the normal operation of the lithium battery management system.

The insulation detecting module 123 is connected to the microprocessor module 11, and performs real-time monitoring on the insulation state of the lithium battery system. When the insulation performance of the lithium battery system fails to meet the design requirements, a signal is given for the vehicle controller to perform corresponding processing. , to ensure the safety of the lithium battery system and the entire vehicle.

The relay control and diagnosis module 124 is connected to the MCU module, and controls the lithium battery system by receiving the control signal given by the microprocessor module 11 to control the closing and opening of the high voltage relay. Whether the system supplies power to the outside, diagnoses the state of the high-voltage relay, and feeds back the status information of the relay to the microprocessor module 11 for processing to ensure the safety of the vehicle system;

The total voltage collecting module 122 and the current collecting module 121 are respectively connected to the microprocessor module 11, and accurately collect the total voltage and the working current of the lithium battery system, and send the collected data to the microprocessor module 11 for performing. Subsequent processing;

The battery module monitoring unit 13 (131, 132, ... 13N) and the microprocessor module respectively

11 connected, voltage collection, equalization and temperature collection of the lithium battery cells in the module, and the collected data is transmitted to the microprocessor module 11 for analysis and processing;

The non-volatile memory module 127 is connected to the microprocessor module 11 to perform non-volatile storage and reading of the status information of the lithium battery system;

The microprocessor module 11 is a core module of the lithium battery management system, and is configured to receive signals sent by the total voltage collection module 122, the current collection module 121, the insulation detection module 123, and the battery module monitoring unit 3, and perform signals on the signals. Analytical processing, at the same time, the processed signal is sent to other electronic control systems through the CAN transceiver module 126, and receives signals sent by other electronic control systems, and after comprehensive processing, sends control signals to the relay control and diagnosis module 124, thereby The operation of the battery system is controlled and managed.

The relay control and diagnosis module 124 receives the control signal sent by the I/O port of the MCU module 11, and the FET pre-drives the chip and the FET to jointly drive and control the high voltage relay of the main circuit of the lithium battery system to control the high voltage. Closing and disconnecting of the relay; each driving channel of the FET pre-drive chip independently detects the switching state of the relay, the open state of the open circuit of the relay, and the short circuit of the power supply, and each of the serial data forms through the synchronous serial interface The state of the channel is transmitted to the MCU module 11, and the signal is bidirectionally transmitted between the module and the MCU module 11, the relay is controlled, and the state of the relay is diagnosed.

The insulation detecting module 123 determines the real-time insulation state between the positive electrode (negative electrode) of the lithium battery system and the vehicle body ground by determining whether the lithium battery system affects the voltage of the internal circuit node of the module by using the one-way conduction characteristic of the diode. When the lithium battery system is not reliably separated from the whole vehicle, the module outputs a high level signal to the MCU module 11 for processing, and simultaneously illuminates the light emitting diode to indicate insulation failure.

The battery module monitoring unit 3 is a battery module in which a plurality of lithium battery cells are connected in series to form a battery module. Block group, the battery module monitoring unit 3 collects the voltage of each lithium battery cell, and transmits the collected lithium battery cell voltage to the MCU module 11 for processing in real time; the battery module monitoring unit 3 pairs each The voltage of the battery cell is analyzed, and the average value of the voltage of the lithium battery cell in each module is calculated, and the cell with a voltage higher than the average value is equalized, and the method of equalizing the resistance energy is used, that is, the cell voltage Higher monomers are subjected to electrical discharge treatment.

The MCU (micro processing) module 11, the power module 12, the total voltage collecting module 122, the current collecting module 121, the insulation detecting module 123, the relay control and diagnostic module 124, and the battery module monitoring unit 13 can be integrated on one circuit board.

The system of the present invention may further comprise a non-volatile memory module 127 coupled to the microprocessor module 11 for non-volatile storage and reading of status information of the lithium battery system.

The system of the present invention may further include a CAN transceiver module 126 coupled to the microprocessor module 11 for transmitting signals processed by the microprocessor module 11 to an electronic control system.

The system of the present invention may further include a HANDSHAKE (handshake signal) transceiver module 125 connected to the microprocessor module 11, and the HANDSHAKE transceiver module is a hardware diagnostic module for diagnosing the battery management system and the emergency shutdown system required for the entire vehicle. Serious failure. Serious faults such as CAN network communication or controller failure.

All of the functional modules described above can also be integrated on a single board.

Referring to FIG. 2, the figure is a schematic diagram of the relay control and diagnosis module 124 of the lithium battery management system of the present invention.

The relay control and diagnosis module 124 of the present invention receives the control signal sent by the I/O port of the microprocessor module 11, and the FET pre-drives the chip V2 and the FET to complete the high voltage of the main circuit of the lithium battery system. The drive control of the relay controls the closing and opening of the high voltage relay.

Each driving channel of the FET pre-drive chip V2 independently detects a switching state of the relay, a short circuit state of the open circuit of the relay, and a short circuit of the power supply, and transmits the state of each channel to the microprocessor module, The signals between the microprocessor modules 11 are bidirectionally transmitted, the relays are controlled and the status of the relays is diagnosed.

The relay control and diagnosis module 124 of the present invention specifically receives the control signal sent by the I/O port of the MCU module 11 through the field effect transistor pre-drive chip V2 input terminals IN0, IN1, IN2, IN3, and the FET pre-drive chip V2 output. OUT0, OUTl, OUT2, OUT3 and FET Ql, respectively The gates of Q2, Q3, and Q4 are connected, and the sources of the FETs Q1, Q2, Q3, and Q4 are connected to the circuit ground, and the drains of the FETs Q1, Q2, Q3, and Q4 are respectively connected to the DRAIN0 of the FET pre-drive chip V2. DRAIN1, DRAIN2, DRAIN3 pins are connected. The forward bias of the diodes D1, D2, D3, and D4 are respectively connected to the drains of the FETs Q1, Q2, Q3, and Q4, and the reverse biases of the diodes D1, D2, D3, and D4 are respectively connected to the power source VCC, and the protection field is respectively The effect tube works normally.

The relay control and diagnosis module 124 is driven by the FET pre-drive chip V2 and the FETs Ql, Q2, Q3, and Q4 to drive and control the high voltage relay of the main circuit of the lithium battery system, and specifically control the closing and opening of the high voltage relay. At the same time, each driving channel of the FET pre-drive chip V2 can independently detect the switching state of the high-voltage relay, the open-circuit short-circuit state of the high-voltage relay, and the short-circuit of the power supply, and can be serialized data through the synchronous serial interface. The status of each channel is transmitted to the MCU module 11, and the high voltage relay can be controlled and the status of the high voltage relay can be diagnosed by bidirectional transmission of signals between the relay control and diagnostic module 124 and the MCU module 11.

Referring to FIG. 3, the figure is a schematic diagram of the principle of the insulation detection module 123 of the lithium battery management system of the present invention. The insulation detecting module 123 is used for testing to determine whether the lithium battery system is reliably separated from the entire vehicle.

The circuit of the insulation detecting module 123 is specifically: a resistor R1 and a resistor R2 are connected in series between the battery system total positive and the battery system total negative. One end of the resistor R3 is connected to the resistor R1 and the resistor R2, and the other end of the resistor R3 is reverse-biased with the diode D5, and the diode D6 is forward-biased. Diode D5 is forward biased through resistor R4 to the V3 input IN A of the detection unit (detection chip), and is connected in reverse bias with Zener diode D7 via resistor R15. Diode D6 is reverse biased through resistor R4 to the input terminal IN B of the detection unit V3, and is connected in reverse bias with the Zener diode D7 via resistor R16.

The resistor R9 is connected to the circuit power supply VCC, the other end of the resistor R9 is connected in series with the resistor R8, and the other end of the resistor R8 is connected to the reverse bias of the Zener diode D7. The Zener diode D7 is forward biased and connected to the circuit ground. . The resistor R17 is connected to the circuit power supply VCC, and the other end of the resistor R17 is connected in reverse bias with the Zener diode D7. The voltage dividing signal generated by the resistor R8 and the resistor R9 is input to the input terminal of the detecting unit V3 IN Co

The output terminal OUT A voltage signal of the detecting unit V3 is input to the input terminal IN D of the detecting unit V3 through the resistor R7. The voltage signal of the output terminal OUT A of the detecting unit V3 is input to the detecting list through the resistor R6. Element V3 input IN A.

The output terminal OUT B of the detection unit V3 is the insulation detection output. The output terminal OUT B of the detecting unit V3 is connected to the resistor R10-terminal, and the other end of the resistor R10 is connected to the LED D8. When the lithium battery system is not reliably separated from the whole vehicle, the output terminal OUT B of the detecting unit V3 outputs a high level. The signal is sent to the MCU module 11 for processing, and the LED D8 is driven by the resistor R10 to indicate insulation failure.

The insulation detecting module 123 uses the one-way conduction characteristic of the diodes D4 and D5 to determine whether the lithium battery system affects the voltage of the internal circuit node of the insulation detecting module, thereby determining the real-time insulation state between the positive electrode, the negative electrode and the entire vehicle of the lithium battery system. . When the lithium battery system is not reliably separated from the entire vehicle, the insulation detecting module 123 outputs a high level signal to the microprocessor module 11 for processing, and simultaneously illuminates the light emitting diode D to indicate insulation failure.

At the same time, the present invention can also calculate the real-time insulation resistance of the lithium battery system through the insulation detection module 123. The battery system always has an insulation equivalent resistance R _x , and the battery system is always passing the resistance R _x , The Zener diode D7, the resistor R15, the diode D6, and the resistors R3 and R2 form a loop, and the current of the loop is determined by the equivalent insulation resistance R _x . Therefore, the magnitude of the equivalent resistance causes the voltage drop across the resistor R15 to change. The MCU module 11 collects the voltage drop across the resistor R15 in the insulation detecting module 123. After the table analysis, the lithium battery system can be calculated relative to the entire vehicle. The equivalent insulation resistance. Similarly, the MCU module 11 collects the voltage drop across the resistor R16 in the insulation detection module. After the table analysis, the equivalent insulation resistance of the lithium battery system total negative relative to the vehicle ground can be calculated.

Referring to FIG. 4, the figure is a schematic diagram of the battery module monitoring unit 13 of the lithium battery management system of the present invention.

According to the designer's needs, the user can connect multiple (up to 12) lithium battery cells in series to form a battery module group.

The battery module monitoring unit 131 can collect the voltage of each lithium battery cell.

The battery module monitoring unit 131 analyzes the voltage of each battery cell, and obtains an average value of the lithium battery cell voltages in each module by calculation, and equalizes the lithium battery cells whose voltage is higher than the average value.

The battery module monitoring unit 131 can be equalized by using a resistor energy consumption method, that is, discharging a lithium battery cell with a relatively high voltage to achieve equalization. The implementation circuit of the battery module monitoring unit 131 may specifically be:

The positive pole of the battery cell is connected to the Cn of the monitoring unit V4, and the negative pole is connected to the Cn-1 of the monitoring unit V4, and the voltage of the battery cell can be collected and calculated. When the cell voltage is too high, the Sn of the monitoring unit V4 is equalized. The signal drives the MOS transistor Q5 to conduct. The source of the MOS transistor Q5 is connected to the positive electrode of the single cell, the gate of the MOS transistor Q5 is connected to the Sn of the monitoring unit V4 through the resistor R11, the drain of the MOS transistor Q5 is connected to the terminal of the resistor R12, and the other end of the resistor R12 is connected to the negative terminal of the battery. The connected circuit forms a discharge equalization process for the excessively high voltage single cell by means of the energy consumption of the resistor R12. Diode D is connected to the source and gate of MOS transistor Q5 to protect the normal operation of the MOS transistor.

While the lithium battery management system is working, each module can also collect the battery temperature of the lithium battery module, and the operational amplifier V5 generates a stable reference voltage for temperature acquisition. The output terminal OUT of the operational amplifier V5 is connected to one end of the resistor R14, and the resistor R14 is connected. The other end is connected to the temperature collecting point, the resistor R13 is connected to the resistor R14, and the other end is connected to the Vtemp end of the monitoring unit V4, and the temperature value of the battery module is calculated by receiving the signal of the temperature collecting point. After the MCU module 11 comprehensively calculates and processes, the corresponding processing is performed when the battery temperature is too high to ensure the performance and safety of the lithium battery system.

Claims

Rights request

A lithium battery management system, characterized in that: the lithium battery management system comprises: a processor module, a power module, a total voltage acquisition module, a current collection module, an insulation detection module, a relay control and a diagnosis module;

2. The lithium battery management system according to claim 1, wherein: the system further comprises a non-volatile memory module connected to the microprocessor module for performing state information of the lithium battery system. Loss of storage read and write.

3. The lithium battery management system according to claim 1, wherein: said system further comprises a CAN transceiver module coupled to said microprocessor module for processing said microprocessor module signal Send to the electronic control system.

4. The lithium battery management system according to claim 1, wherein: the system further comprises a handshake signal transceiver module connected to the microprocessor module; the handshake signal transceiver module is configured to diagnose the lithium Battery management systems and serious vehicle failures that require emergency shutdown of the system.

5. The lithium battery management system according to claim 1, wherein:

The relay control and diagnosis module receives the control signal sent by the microprocessor module, and the FET pre-drives the chip and the FET to complete the driving control of the high voltage relay of the main circuit of the lithium battery system, and controls the closing of the high voltage relay. And disconnected;

6. The lithium battery management system according to claim 1, wherein: the circuit of the relay control and diagnosis module is specifically a receiving terminal of the four input terminals IN0, IN1, IN2, and IN3 of the FET pre-drive chip V2. The control signal sent by the microprocessor module, the output terminals OUT0, OUT1, OUT2, OUT3 of the FET pre-drive chip V2 are respectively connected to the gates of the four FETs Q1, Q2, Q3, Q4, four field effects The sources of the transistors Q1, Q2, Q3, and Q4 are connected to the circuit ground, and the drains of the four FETs Q1, Q2, Q3, and Q4 are respectively associated with the DRAIN0, DRAIN1, DRAIN2, and DRAIN3 tubes of the pre-driver chip V2. Connected to the feet;

The forward bias of the four diodes Dl, D2, D3, D4 and the four FETs Ql, Q2, respectively

The drains of Q3 and Q4 are connected, and the reverse bias of the four diodes D1, D2, D3, and D4 are respectively connected to the power supply VCC.

7. The lithium battery management system according to claim 1, wherein:

The circuit of the insulation detection module is specifically: a resistor R1 and a resistor R2 are connected in series between the total positive of the battery system and the total negative of the battery system; one end of the resistor R3 is connected to the resistor R1 and the resistor R2, and the other end of the resistor R3 is opposite to the diode D5. Diode D6 is forward biased; diode D5 is forward biased through resistor R4 to input terminal IN A of detection unit V3, and is connected in reverse bias with Zener diode D7 through resistor R15; diode D6 is reverse biased It is connected to the input terminal IN B of the detecting unit V3 through the resistor R4, and is connected in reverse bias with the Zener diode D7 through the resistor R16; The resistor R9 is connected to the circuit power supply VCC, the other end of the resistor R9 is connected in series with the resistor R8, and the other end of the resistor R8 is connected to the reverse bias of the Zener diode D7. The Zener diode D7 is forward biased and connected to the circuit ground. The resistor R17 is connected to the circuit power supply VCC, the other end of the resistor R17 is connected in reverse bias with the Zener diode D7; the voltage dividing signal generated by the resistor R8 and the resistor R9 is input to the input terminal IN C of the detecting unit V3;

The detection unit V3 output terminal OUT A voltage signal is input to the detection unit V3 input terminal IN D through the resistor R7; the detection unit V3 output terminal OUT A voltage signal is input to the detecting unit V3 input terminal IN A through the resistor R6;

8. The lithium battery management system according to claim 1, wherein: a plurality of lithium battery cells are connected in series to form a battery module group; and the battery module monitoring unit collects voltage of each lithium battery cell. And transmitting the collected lithium battery cell voltage to the microprocessor module in real time.

9. The lithium battery management system according to claim 7, wherein: said equalizing adopts a method of resisting energy consumption.

10. The lithium battery management system according to claim 1, wherein: the implementation circuit of the battery module monitoring unit is:

The positive pole of the battery cell is connected to the Cn of the monitoring unit V4, and the negative pole is connected to the Cn-1 of the monitoring unit V4, and the voltage of the battery cell can be collected and calculated. When the cell voltage is too high, the Sn of the monitoring unit V4 is equalized. The signal drives the MOS transistor Q5 to conduct. The source of the MOS transistor Q5 is connected to the positive electrode of the single cell, the gate of the MOS transistor Q5 is connected to the Sn of the monitoring unit V4 through the resistor R11, the drain of the MOS transistor Q5 is connected to the terminal of the resistor R12, and the other end of the resistor R12 is connected to the negative terminal of the battery. The connected circuit forms a discharge equalization process for the excessively high voltage single cell by means of the energy consumption of the resistor R12. The diode D is connected to the source and the gate of the MOS transistor Q5.

The lithium battery management system according to any one of claims 1-8, wherein: the microprocessor module, the current collecting module, the total voltage collecting module, the insulation detecting module, the relay control and the diagnostic module are integrated. On a circuit board.