A battery pack status monitoring system

Abstract

The present invention discloses a battery pack state monitoring system. By setting a plurality of thermistors and temperature sensors, the temperature of the battery is accurately monitored. When a short circuit fault occurs in the battery, the system can detect and perform continuous current protection in the first time, thereby avoiding the short circuit fire fault and the problem that the battery pack cannot work due to the short circuit of a single battery. The present invention has a simple structure and is easy to implement. It can monitor the various states of the battery and the battery pack respectively, accurately monitor the voltage and temperature of the single battery, and accurately monitor the current, voltage and temperature of the battery pack. The monitoring signal of the battery and the battery pack is analyzed by a monitoring machine, and the faulty battery is found in time. By setting a plurality of diodes, continuous current protection of the battery pack is realized, thereby ensuring the normal operation of the battery pack.

Description

Technical Field

[0001] The invention belongs to the field of battery status monitoring, and in particular relates to a battery pack status monitoring system. Background Art

[0002] With the rapid development of my country's communications and power industries, the use of batteries is also increasing rapidly. Under the current conditions of battery use, some unexpected situations often occur, such as a seemingly normal battery failing to discharge electricity. The main reason for this situation is that the operating status of the battery is not effectively monitored, resulting in one or more batteries in the battery pack failing and not being sorted out in time, which in turn causes the entire battery pack to fail to discharge normally. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, a battery pack status monitoring system provided by the present invention solves the problem that the battery pack cannot work due to the failure of a single battery.

[0004] In order to achieve the above-mentioned invention object, the technical scheme of the present invention is: a battery pack state monitoring system, including a battery pack Es, a temperature signal input module, a voltage signal input module, a discharge control module, a +5V power supply module, a first isolation power supply module, a first +3.3V power supply module, a first AD conversion module, a first control module, a first CAN communication module, a power supply module, a monitoring machine, a +5V analog power supply module, a second +3.3V power supply module, a second isolation power supply module, a current sensor power supply module, a current signal processing module, a current detection module, a temperature measurement module, a battery pack voltage detection module, a second AD conversion module, a second control module, an RS485 communication module and a second CAN communication module;

[0005] The battery pack Es includes a battery E1, a battery E2 and a battery E3 which are connected in sequence, the positive electrode of the battery E1 is the positive electrode of the battery pack Es, and the negative electrode of the battery E3 is the negative electrode of the battery pack Es; the temperature measuring unit includes a first temperature measuring unit, a second temperature measuring unit and a third temperature measuring unit, the first temperature measuring unit is fixed to the negative electrode of the battery E1 through a temperature sensor H1, the second temperature measuring unit is fixed to the negative electrode of the battery E2 through a temperature sensor H2, and the third temperature measuring unit is fixed to the negative electrode of the battery E3 through a temperature sensor H3;

[0006] The temperature signal input module is fixed to the negative electrode of the battery E1, the negative electrode of the battery E2 and the negative electrode of the battery E3 in one-to-one correspondence through thermistors Re1, Re2 and Re3, respectively; the positive electrode of the battery E1 is connected to the negative electrode of the freewheeling diode Dx1, one end of the switch K1 and one end of the switch K8, the positive electrode of the battery E2 is connected to the positive electrode of the freewheeling diode Dx1, the negative electrode of the freewheeling diode Dx2, one end of the switch K2 and one end of the switch K7, the positive electrode of the battery E3 is connected to the positive electrode of the freewheeling diode Dx2, the negative electrode of the freewheeling diode Dx3, one end of the switch K3 and one end of the switch K6, the negative electrode of the battery E3 is connected to the positive electrode of the freewheeling diode Dx3, one end of the switch K4 and one end of the switch K5, and the other end of the switch K5, the other end of the switch K6, the other end of the switch K7 and the other end of the switch K8 are connected to the voltage signal input module respectively;

[0007] The other end of the switch K1 is respectively connected to the other end of the switch K3, the discharge control module and the +5V power supply module, the other end of the switch K2 is respectively connected to the other end of the switch K4, the discharge control module and the +5V power supply module, the current detection module is connected to the wire connected to the positive electrode of the battery pack Es through the current sensor PA, and the battery pack voltage detection module is respectively connected to the positive electrode and the negative electrode of the battery pack Es;

[0008] The discharge control module is respectively connected to the first AD conversion module and the first control module, the +5V power supply module is respectively connected to the first isolation power supply module and the first +3.3V power supply module, the first isolation power supply module is connected to the first CAN communication module, the first +3.3V power supply module is respectively connected to the first AD conversion module, the first control module, the first CAN communication module and the temperature signal input module, the first AD conversion module is respectively connected to the voltage signal input module, the temperature signal input module and the first control module, the first control module is respectively connected to the temperature signal input module and the first CAN communication module, and the first CAN communication module is connected to the monitoring machine;

[0009] The power supply module is connected to the monitoring machine and the +5V analog power supply module respectively, and is used to provide 220V DC power to the monitoring machine and 24V DC power to the +5V analog power supply module;

[0010] The +5V analog power supply module is respectively connected to the RS485 communication module, the second CAN communication module and the current sensor power supply module, the second isolation power supply module is respectively connected to the current sensor power supply module and the second +3.3V power supply module, the second +3.3V power supply module is respectively connected to the RS485 communication module, the second CAN communication module, the second control module, the second AD conversion module, the first temperature measurement unit, the second temperature measurement unit and the third temperature measurement unit, the current sensor power supply module is connected to the current detection module, the current detection module is connected to the current signal processing module, the current signal processing module is connected to the second AD conversion module, the battery pack voltage detection module is connected to the second AD conversion module, the second AD conversion module is connected to the second control module, the second control module is respectively connected to the RS485 communication module and the second CAN communication module, the RS485 communication module is connected to the second CAN communication module, and the RS485 communication module and the second CAN communication module are both connected to the monitoring machine.

[0011] The beneficial effects of the present invention are:

[0012] (1) The present invention can monitor various states of batteries and battery packs respectively, can accurately monitor the voltage and temperature of single batteries, and can accurately monitor the current, voltage and temperature of battery packs. The monitoring signals of batteries and battery packs are analyzed by the monitoring machine to timely discover faulty batteries.

[0013] (2) The present invention provides a plurality of diodes to achieve freewheeling protection for the battery pack, thereby ensuring the normal operation of the battery pack and avoiding the problem of the battery pack not being able to operate.

[0014] (3) The present invention accurately monitors the temperature of the battery by setting up multiple temperature sensors. When a short circuit fault occurs in the battery, it can be discovered and continuous current protection can be performed in the first time, avoiding short circuit fire faults and avoiding the problem of battery pack failure to work due to short circuit of single battery cells.

[0015] (4) The present invention has a simple structure and is easy to implement, and multiple thermistors and multiple temperature sensors are provided at the same time, thereby ensuring accurate monitoring of the battery temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A block diagram of a battery pack status monitoring system proposed by the present invention;

[0017] Figure 2 The single battery monitoring circuit proposed by the present invention;

[0018] Figure 3 The battery pack monitoring circuit proposed by the present invention; DETAILED DESCRIPTION

[0019] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0020] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0021] like Figure 1 As shown, a battery pack state monitoring system includes a battery pack Es, a temperature signal input module, a voltage signal input module, a discharge control module, a +5V power supply module, a first isolated power supply module, a first +3.3V power supply module, a first AD conversion module, a first control module, a first CAN communication module, a power supply module, a monitoring machine, a +5V analog power supply module, a second +3.3V power supply module, a second isolated power supply module, a current sensor power supply module, a current signal processing module, a current detection module, a temperature measurement module, a battery pack voltage detection module, a second AD conversion module, a second control module, an RS485 communication module, and a second CAN communication module;

[0022] The battery pack Es includes a battery E1, a battery E2 and a battery E3 which are connected in sequence, the positive electrode of the battery E1 is the positive electrode of the battery pack Es, and the negative electrode of the battery E3 is the negative electrode of the battery pack Es; the temperature measuring unit includes a first temperature measuring unit, a second temperature measuring unit and a third temperature measuring unit, the first temperature measuring unit is fixed to the negative electrode of the battery E1 through a temperature sensor H1, the second temperature measuring unit is fixed to the negative electrode of the battery E2 through a temperature sensor H2, and the third temperature measuring unit is fixed to the negative electrode of the battery E3 through a temperature sensor H3;

[0023] The temperature signal input module is fixed to the negative electrode of the battery E1, the negative electrode of the battery E2 and the negative electrode of the battery E3 in one-to-one correspondence through thermistors Re1, Re2 and Re3, respectively; the positive electrode of the battery E1 is connected to the negative electrode of the freewheeling diode Dx1, one end of the switch K1 and one end of the switch K8, the positive electrode of the battery E2 is connected to the positive electrode of the freewheeling diode Dx1, the negative electrode of the freewheeling diode Dx2, one end of the switch K2 and one end of the switch K7, the positive electrode of the battery E3 is connected to the positive electrode of the freewheeling diode Dx2, the negative electrode of the freewheeling diode Dx3, one end of the switch K3 and one end of the switch K6, the negative electrode of the battery E3 is connected to the positive electrode of the freewheeling diode Dx3, one end of the switch K4 and one end of the switch K5, and the other end of the switch K5, the other end of the switch K6, the other end of the switch K7 and the other end of the switch K8 are connected to the voltage signal input module respectively;

[0024] The other end of the switch K1 is respectively connected to the other end of the switch K3, the discharge control module and the +5V power supply module, the other end of the switch K2 is respectively connected to the other end of the switch K4, the discharge control module and the +5V power supply module, the current detection module is connected to the wire connected to the positive electrode of the battery pack Es through the current sensor PA, and the battery pack voltage detection module is respectively connected to the positive electrode and the negative electrode of the battery pack Es;

[0025] The discharge control module is respectively connected to the first AD conversion module and the first control module, the +5V power supply module is respectively connected to the first isolation power supply module and the first +3.3V power supply module, the first isolation power supply module is connected to the first CAN communication module, the first +3.3V power supply module is respectively connected to the first AD conversion module, the first control module, the first CAN communication module and the temperature signal input module, the first AD conversion module is respectively connected to the voltage signal input module, the temperature signal input module and the first control module, the first control module is respectively connected to the temperature signal input module and the first CAN communication module, and the first CAN communication module is connected to the monitoring machine;

[0026] The power supply module is connected to the monitoring machine and the +5V analog power supply module respectively, and is used to provide 220V DC power to the monitoring machine and 24V DC power to the +5V analog power supply module;

[0027] The +5V analog power supply module is respectively connected to the RS485 communication module, the second CAN communication module and the current sensor power supply module, the second isolation power supply module is respectively connected to the current sensor power supply module and the second +3.3V power supply module, the second +3.3V power supply module is respectively connected to the RS485 communication module, the second CAN communication module, the second control module, the second AD conversion module, the first temperature measurement unit, the second temperature measurement unit and the third temperature measurement unit, the current sensor power supply module is connected to the current detection module, the current detection module is connected to the current signal processing module, the current signal processing module is connected to the second AD conversion module, the battery pack voltage detection module is connected to the second AD conversion module, the second AD conversion module is connected to the second control module, the second control module is respectively connected to the RS485 communication module and the second CAN communication module, the RS485 communication module is connected to the second CAN communication module, and the RS485 communication module and the second CAN communication module are both connected to the monitoring machine.

[0028] like Figure 2 As shown, the positive electrode of the battery E1 is respectively connected to the 1st pin and the 3rd pin of the terminal J1, the negative electrode of the battery E1 is respectively connected to the 2nd pin and the 4th pin of the terminal J1, one end of the thermistor Re1 is connected to the 5th pin of the terminal J1, the other end of the thermistor Re1 is connected to the 6th pin of the terminal J1, the 1st pin of the terminal J1 is respectively connected to one end of the fuse FU1 and one end of the fuse FU2, and the 2nd pin of the terminal J2 is respectively connected to one end of the resistor R10, one end of the resistor R11, and the first positive electrode and the second positive electrode of the Schottky diode D1.

[0029] In this embodiment, the method for monitoring the temperature change of the battery E2 electrode by thermistor Re2 is the same as the method for detecting the temperature change of the battery E1 electrode by thermistor Re1, and the method for detecting the temperature change of the battery E3 electrode by thermistor Re3 is the same as the method for monitoring the temperature change of the battery E1 electrode by thermistor Re1.

[0030] The discharge control module includes a thermal protection switch KSD, one end of which is respectively connected to the other end of the fuse FU1, the cathode of the Schottky diode D1, one end of the resistor R2, one end of the resistor R4 and one end of the resistor R5, the other end of the thermal protection switch KSD is connected to the drain of the field effect tube Q1 through the resistor R1, the other end of the resistor R2 is respectively connected to the grounding resistor R3, the cathode of the diode D2 and the PA0 pin of the control chip U1 in the first control module, the anode of the diode D2 is grounded, the source of the field effect tube Q1 is respectively connected to the other end of the resistor R10, one end of the capacitor C1 and one end of the resistor R12, the other end of the resistor R12 is respectively connected to one end of the capacitor C2 and the AIN2 pin of the AD conversion chip U3 in the first AD conversion module, the gate of the field effect tube Q1 is respectively connected to the transistor The collector of Q2 is connected to one end of the resistor R13, the emitter of the transistor Q2 is connected to the other end of the resistor R4, the base of the transistor Q2 is respectively connected to the other end of the resistor R5 and the collector of the transistor Q3 through the resistor R6, the base of the transistor Q3 is connected to one end of the resistor R7, the other end of the resistor R7 is respectively connected to one end of the resistor R8, the cathode of the diode D3 and the grounded capacitor C3, the anode of the diode D3 is respectively connected to the cathode of the diode D4 and one end of the capacitor C4, the anode of the diode D4 is connected to one end of the resistor R9, the other end of the capacitor C4 is connected to the PA3 pin of the control chip U1, and the other end of the resistor R11, the other end of the capacitor C1, the other end of the capacitor C2, the other end of the resistor R13, the emitter of the transistor Q3, the other end of the resistor R8 and the other end of the resistor R9 are all grounded.

[0031] The +5V power supply module includes a diode D5, the positive electrode of the diode D5 is connected to the other end of the fuse FU2, the negative electrode of the diode D5 is respectively connected to one end of the capacitor C5, the positive electrode of the polar capacitor C6 and the Vin pin of the voltage stabilizing chip U2, the Vout pin of the voltage stabilizing chip U2 is the +5V voltage output end, the Vout pin of the voltage stabilizing chip U2 is respectively connected to the positive electrode of the polar capacitor C7 and one end of the capacitor C8, the other end of the capacitor C5, the negative electrode of the polar capacitor C6, the GND pin of the voltage stabilizing chip U2, the negative electrode of the polar capacitor C7 and the other end of the capacitor C8 are all grounded.

[0032] The voltage signal input module includes a resistor R14 and a resistor R15, one end of the resistor R14 is connected to the third pin of the wiring terminal J1, the other end of the resistor 14 is respectively connected to one end of the resistor R15, one end of the resistor R16 and one end of the capacitor C9, the other end of the resistor R16 is respectively connected to one end of the capacitor C10 and the AIN1 pin of the AD conversion chip U3, and the fourth pin of the wiring terminal J1, the other end of the resistor R15, the other end of the capacitor C19 and the other end of the capacitor C10 are all grounded.

[0033] The temperature signal input module includes a resistor R17, one end of which is respectively connected to the 5th pin of the wiring terminal J1, one end of the resistor R18, one end of the resistor R19 and the grounding capacitor C11, the other end of the resistor R17 is connected to the OUT pin of the voltage regulator chip U6 in the first +3.3V power supply module, the other end of the resistor R18 is connected to the PA1 pin of the control chip U1, the other end of the resistor R19 is respectively connected to the grounding capacitor C12 and the AIN0 pin of the AD conversion chip U3, and the 6th pin of the wiring terminal J1 is grounded.

[0034] The first AD conversion module includes an AD conversion chip U3, the AVDD pin of the AD conversion chip U3 is respectively connected to one end of the capacitor C14, one end of the capacitor C15 and one end of the inductor L1, the other end of the inductor L1 is connected to the OUT pin of the voltage stabilizing chip U6, the AVSS pin of the AD conversion chip U3 is respectively connected to the other end of the capacitor C14, the other end of the capacitor C15 and one end of the inductor L2, the other end of the inductor L2 is grounded, the DIN pin of the AD conversion chip U3 is respectively connected to one end of the grounded capacitor C17 and a resistor R21, the DOUT pin of the AD conversion chip U3 is connected to one end of the resistor R22, the SCLK pin of the AD conversion chip U3 is respectively connected to one end of the grounded capacitor C16 and a resistor R23, and the The pins are connected to one end of the grounding capacitor C18 and the resistor R24 ​​respectively. The pin is connected to one end of the resistor R25, the CLK pin of the AD conversion chip U3 is grounded, the DVDD pin of the AD conversion chip U3 is respectively connected to one end of the capacitor C19, one end of the capacitor C20 and the OUT pin of the voltage stabilizing chip U6, and the DGND pin of the AD conversion chip U3, the other end of the capacitor C19 and the other end of the capacitor C20 are all grounded.

[0035] The other end of the resistor R21 is connected to the PA7 pin of the control chip U1, the other end of the resistor R22 is connected to the PA6 pin of the control chip U1, the other end of the resistor R23 is connected to the PA5 pin of the control chip U1, the other end of the resistor R24 ​​is connected to the PA4 pin of the control chip U1, and the other end of the resistor R25 is connected to the PB0 pin of the control chip U1.

[0036] The first CAN communication module includes a CAN bus isolation chip U4, the Vcc1 pin of the CAN bus isolation chip U4 is respectively connected to the OUT pin of the voltage stabilizing chip U6, the grounding capacitor C26 and the grounding capacitor C27, the RXD pin of the CAN bus isolation chip U4 is connected to the PA11 pin of the control chip U1, the TXD pin of the CAN bus isolation chip U4 is connected to the PA12 pin of the control chip U1, the GND pin of the CAN bus isolation chip U4 is grounded, the Vcc2 pin of the CAN bus isolation chip U4 is respectively connected to one end of the inductor L5, one end of the capacitor C28 and one end of the capacitor C29, the CANH pin of the CAN bus isolation chip U4 is connected to the common mode inductor The first pin of the common-mode inductor T1 is connected to the first pin of the common-mode inductor T1, the third pin of the common-mode inductor T1 is respectively connected to one end of the TVS diode D9, the first pin and the third pin of the wiring terminal J3, the CANL pin of the CAN bus isolation chip U4 is connected to the second pin of the common-mode inductor T1, the fourth pin of the common-mode inductor T1 is respectively connected to one end of the TVS diode D8, the second pin and the fourth pin of the wiring terminal J3, and the GND2 pin of the CAN bus isolation chip U4 is respectively connected to the other end of the capacitor C28, the other end of the capacitor C29, the other end of the TVS diode D9, the other end of the TVS diode D8, one end of the resistor R99, one end of the capacitor C32, one end of the capacitor C34 and the O pin of the isolation power chip U5;

[0037] The first isolated power supply module includes an inductor L4 and an isolated power supply chip U5, one end of the inductor L4 is connected to the Vout pin of the voltage stabilizing chip U2, the other end of the inductor L4 is respectively connected to one end of the capacitor C30, one end of the capacitor C31 and the Vin pin of the isolated power supply chip U5, the +Vo pin of the isolated power supply chip U5 is respectively connected to the other end of the capacitor C32, the other end of the resistor R99 and the other end of the inductor L5, one end of the inductor L5 is the analog circuit +5 power output terminal, the other end of the capacitor C30, the other end of the capacitor C31, the other end of the capacitor C34 and the GND pin of the isolated power supply chip U5 are all grounded.

[0038] The first +3.3V power supply module includes a voltage stabilizing chip U6, an IN pin of the voltage stabilizing chip U6 is respectively connected to the positive electrode of the polarity capacitor C35, one end of the capacitor C36 and the Vout pin of the voltage stabilizing chip U2, an OUT pin of the voltage stabilizing chip U6 is respectively connected to the positive electrode of the polarity capacitor C37 and one end of the capacitor C38, the OUT pin of the voltage stabilizing chip U6 is a +3.3V voltage output terminal, and the negative electrode of the polarity capacitor C35, the other end of the capacitor C36, the negative electrode of the polarity capacitor C37, the other end of the capacitor C38 and the GND pin of the voltage stabilizing chip U2 are all grounded.

[0039] The first control module includes a control chip U1, wherein the PA13 pin of the control chip U1 is connected to the 4th pin of the wiring terminal J2, the PA14 pin of the control chip U1 is connected to the 2nd pin of the wiring terminal J2, the 3rd pin of the wiring terminal J2 is grounded, the 1st pin of the wiring terminal J2 is connected to the OUT pin of the voltage regulator chip U6, the OSC_IN pin of the control chip U1 is respectively connected to one end of the crystal oscillator X1 and the grounding capacitor C21, the OSC_OUT pin of the control chip U1 is respectively connected to the other end of the crystal oscillator X1 and the grounding capacitor C22, the BOOT0 pin of the control chip U1 is respectively connected to the grounding resistor R28 and one end of the resistor R27, the other end of the resistor R27 is connected to the O The UT pin is connected, the NRST pin of the control chip U1 is respectively connected to the grounding capacitor C23, the positive electrode of the diode D7 and one end of the resistor R26, the negative electrode of the diode D7 and the other end of the resistor R26 are connected to the OUT pin of the voltage stabilizing chip U6, the VBAT pin, VDD_1 pin, VDD_2 pin and VDD_3 pin of the control chip U1 are all connected to the OUT pin of the voltage stabilizing chip U6, the VDDA pin of the control chip U1 is respectively connected to one end of the inductor L3, the grounding capacitor C24 and the grounding capacitor C25, the BOOT1 pin of the control chip U1 is connected to the grounding resistor R29, and the VSS_1 pin, VSS_2 pin, VSS_3 pin and VSSA pin of the control chip U1 are all grounded.

[0040] The OUT pin of the voltage stabilizing chip U6 is connected to a grounding capacitor C39 , a grounding capacitor C40 , a grounding capacitor C41 , a grounding capacitor C42 , a grounding capacitor C43 and a grounding capacitor C44 respectively.

[0041] like Figure 3As shown, the current detection module includes a current sensor PA, a + pin of the current sensor PA is connected to the 1st pin of the wiring terminal J4, a - pin of the current sensor PA is connected to the 2nd pin of the wiring terminal J4, an M pin of the current sensor PA is connected to the 3rd pin of the wiring terminal J4, and a G pin of the current sensor PA is connected to the 4th pin of the wiring terminal J4.

[0042] The inductive sensor power supply module includes a power chip M1, the first pin of the wiring terminal J4 is respectively connected to one end of the capacitor C46, ​​one end of the capacitor C47 and one end of the inductor L6, the second pin of the wiring terminal J4 is respectively connected to one end of the capacitor C48, one end of the capacitor C49 and one end of the inductor L7, the third pin of the wiring terminal is connected to one end of the resistor R60 in the current signal processing module, the fourth pin of the wiring terminal J4 is respectively connected to one end of the resistor R30, one end of the resistor R34, one end of the resistor R35, one end of the capacitor C45, the other end of the capacitor C46, ​​the other end of the capacitor C47, the other end of the capacitor C48, the other end of the capacitor C49, one end of the capacitor C50, one end of the capacitor C51, one end of the capacitor C52, one end of the capacitor C53, one end of the capacitor C57, one end of the capacitor C58 and the 0V pin of the power chip M1, the other end of the capacitor C45 is respectively connected to the C in the second CAN communication module The GND2 pin of the AN bus isolation chip U10 is connected, the other end of the inductor L6 is respectively connected to the other end of the capacitor C50, the other end of the capacitor C51, the other end of the resistor R34 and the +Vo pin of the power chip M1, the other end of the inductor L7 is respectively connected to the other end of the capacitor C52, the other end of the capacitor C53, the other end of the resistor R35 and the -Vo pin of the power chip M1, the Vin pin of the power chip M1 is respectively connected to the positive electrode of the polarity capacitor C54, one end of the capacitor C55, one end of the inductor L8 and the Vin pin of the power chip M2 in the second power module, the other end of the inductor L8 is connected to the FEEDBACK pin of the buck chip U9 in the +5V analog power module, and the GND pin of the power chip M1 is respectively connected to the negative electrode of the polarity capacitor C54, one end of the capacitor C55, the grounding capacitor C56, the GND pin of the power chip M2 and the GND2 pin of the CAN bus isolation chip U10.

[0043] The +Vo pin of the power chip M2 is connected to one end of the inductor L9 and one end of the capacitor C64 respectively, the other end of the inductor L9 is a +5V voltage output terminal, and the O pin of the power chip M2 and the other end of the capacitor C64 are both grounded.

[0044] The other end of the resistor R60 is respectively connected to the other end of the capacitor C58, one end of the resistor R32 and one end of the resistor R33. The other end of the resistor R30 is respectively connected to one end of the resistor R31, the other end of the resistor R32, one end of the resistor R61 and the other end of the capacitor C57. The other end of the resistor R31 is respectively connected to one end of the capacitor C59, one end of the capacitor C60, one end of the capacitor C62 and the AIN1 pin of the AD conversion chip U8 in the second AD conversion module. The other end of the resistor R33 is respectively connected to the other end of the capacitor C60, one end of the capacitor C61, one end of the capacitor C63 and the AIN0 pin of the AD conversion chip U8. The other end of the capacitor C59 and the other end of the capacitor C62 are both connected to the AVSS pin of the AD conversion chip U8. The other end of the capacitor C61 and the other end of the capacitor C63 are both connected to the AVDD pin of the AD conversion chip U8.

[0045] The battery pack voltage measurement module includes a terminal J5, wherein the first pin of the terminal J5 is respectively connected to the positive electrode of the battery pack Es and one end of a resistor R36, the second pin of the terminal J5 is respectively connected to the negative electrode of the battery pack Es and one end of a resistor R37, the other end of the resistor R36 is respectively connected to one end of a capacitor C65, one end of a resistor R38 and one end of a resistor R39, the other end of the resistor R37 is respectively connected to the other end of the capacitor C65, the other end of the resistor R38, one end of a resistor R40 and one end of a resistor R41, the other end of the resistor R39 is respectively connected to one end of a capacitor C66, one end of a capacitor C One end of the resistor R40 is connected to the other end of the capacitor C67, one end of the capacitor C68 and the AIN3 pin of the AD conversion chip U8, the other end of the resistor R41 is connected to one end of the capacitor C70, one end of the resistor R42, one end of the resistor R43 and the other end of the resistor R61, the other end of the capacitor C66 and the other end of the resistor R42 are both connected to the AVDD pin of the AD conversion chip U8, the other end of the capacitor C68, the other end of the capacitor C70 and the other end of the resistor R43 are all connected to the AVSS pin of the AD conversion chip.

[0046] The second +3.3V power supply module includes a voltage stabilizing chip U7, the IN pin of the voltage stabilizing chip U7 is respectively connected to the positive electrode of the polarity capacitor C71, one end of the capacitor C72 and the other end of the inductor L9, the OUT pin of the voltage stabilizing chip U7 is a +3.3V voltage output terminal, and is respectively connected to the positive electrode of the polarity capacitor C73 and one end of the capacitor C74, the negative electrode of the polarity capacitor C71, the other end of the capacitor C72, the negative electrode of the polarity capacitor C73, the other end of the capacitor C74 and the GND pin of the voltage stabilizing chip U7 are all grounded.

[0047] The AVDD pin of the AD conversion chip U8 is respectively connected to one end of the capacitor C75, one end of the capacitor C76 and one end of the inductor L10, the other end of the inductor L10 is connected to the OUT pin of the voltage stabilizing chip U7, the AVSS pin of the AD conversion chip U8 is respectively connected to the other end of the capacitor C76, the other end of the capacitor C75 and one end of the inductor L11, the other end of the inductor L11 is grounded, the DIN pin of the AD conversion chip U8 is respectively connected to the grounded capacitor C78 and one end of the resistor R52, the DOUT pin of the AD conversion chip U8 is connected to one end of the resistor R53, the SCLK pin of the AD conversion chip U8 is respectively connected to the grounded capacitor C77 and one end of the resistor R54, the The pins are connected to the ground capacitor C79 and one end of the resistor R55 respectively. The pin is connected to one end of the resistor R56, the CLK pin of the AD conversion chip U8 is grounded, the DVDD pin of the AD conversion chip U8 is respectively connected to one end of the capacitor C80, one end of the capacitor C81 and the OUT pin of the voltage regulator chip U7, and the DGND pin of the AD conversion chip U8, the other end of the capacitor C80 and the other end of the capacitor C81 are all grounded.

[0048] The first temperature measurement unit includes a temperature sensor H1, a first pin of the temperature sensor H1 is respectively connected to one end of a resistor R44, a grounding capacitor C69 and an OUT pin of a voltage stabilizing chip U7, a second pin of the temperature sensor H1 is respectively connected to the other end of the resistor R44 and one end of a resistor R45, the other end of the resistor R45 is respectively connected to the cathode of a diode D8 and a PB12 pin of a control chip U13 in a second control module, and a third pin of the temperature sensor H1 and a positive pole of the diode D8 are both grounded.

[0049] In this embodiment, the structures of the second temperature measurement unit and the third temperature measurement unit are the same as that of the first temperature measurement unit. The second temperature measurement unit is connected to the PB1 pin of the control chip U13, and the third temperature measurement unit is connected to the PB3 pin of the control chip U13.

[0050] The RS485 communication module includes a chip U11 and an RS485 transceiver chip U12, the VDD1 pin of the chip U11 is connected to the OUT pin of the voltage stabilizing chip U7, the two GND1 pins of the chip U11 are both grounded, the Voa of the chip U11 is connected to the PA10 pin of the control chip U13, the Vib of the chip U11 is connected to the PA8 pin of the control chip U13, the Vic of the chip U11 is connected to the PA9 pin of the control chip U13, the VDD2 pin of the chip U11 is respectively connected to one end of the grounding capacitor C83 and the resistor R49, the two GND2 pins of the chip U11 are both grounded, the Via pin of the chip U11 is connected to the R pin of the RS485 transceiver chip U12, the Vob pin of the chip U11 is respectively connected to the The Voc pin of the chip U11 is connected to the D pin of the RS485 transceiver chip U12.

[0051] The other end of the resistor R49 is respectively connected to one end of the capacitor C84 and the FEEDBACK pin of the buck chip U9, the other end of the capacitor C84 is respectively connected to one end of the resistor R50, the GND2 pin of the CAN bus isolation chip U10 and the GND pin of the RS485 transceiver chip U12, the B pin of the RS485 transceiver chip U12 is respectively connected to the other end of the resistor R50, one end of the fuse FU3 and one end of the TVS diode D13, the A pin of the RS485 transceiver chip U12 is respectively connected to one end of the resistor R51, the fuse FU 4 is connected to one end of the TVS diode D12, the Vcc pin of the RS485 transceiver chip U12 is respectively connected to the other end of the resistor R51, one end of the capacitor C85 and the FEEDBACK pin of the buck chip U9, the other end of the capacitor C85, the other end of the TVS diode D12 and the other end of the TVS diode D13 are all connected to the GND2 pin of the CAN bus isolation chip U10, the other end of the fuse FU3 is connected to the 4th pin of the wiring terminal J7, and the other end of the fuse FU4 is connected to the 3rd pin of the wiring terminal J7.

[0052] The second CAN communication module includes a CAN bus isolation chip U10, the Vcc1 pin of the CAN bus isolation chip U10 is respectively connected to the grounding capacitor C91, the grounding capacitor C92 and the OUT pin of the voltage regulator chip U7, the RXD pin of the CAN bus isolation chip U10 is connected to the PA11 pin of the control chip U13, the TXD pin of the CAN bus isolation chip U10 is connected to the PA12 pin of the control chip U13, the GND1 pin of the CAN bus isolation chip U10 is grounded, the Vcc2 pin of the CAN bus isolation chip U10 is respectively connected to one end of the capacitor C93, one end of the capacitor C94 and the FEEDBACK pin of the step-down chip U9, and the capacitor C9 The other end of capacitor C94 and the other end of capacitor C94 are both connected to the GND2 pin of the CAN bus isolation chip U10, the CANH pin of the CAN bus isolation chip U10 is connected to the 1st pin of the common mode inductor T2, the CANL pin of the CAN bus isolation chip U10 is connected to the 2nd pin of the common mode inductor T2, the 3rd pin of the common mode inductor T2 is respectively connected to one end of the TVS diode D15 and the 1st pin of the wiring terminal J7, the 4th pin of the common mode inductor T2 is respectively connected to one end of the TVS diode D14 and the 2nd pin of the wiring terminal J7, the other end of the TVS diode D14 and the other end of the TVS diode D15 are both connected to the GND2 pin of the CAN bus isolation chip U10.

[0053] The FEEDBACK pin of the buck chip U9 is the +5V analog circuit voltage output terminal, which is respectively connected to one end of capacitor C95, the positive electrode of polar capacitor C96 and one end of inductor L13, the OUTPUT pin of the buck chip U9 is respectively connected to the other end of inductor L13 and the negative electrode of diode D16, the Vin pin of the buck chip U9 is respectively connected to the positive electrode of polar capacitor C97, one end of capacitor C98 and the negative electrode of diode D17, the positive electrode of diode D17 is connected to the 6th pin of terminal J7 through fuse FU5, the 5th pin of terminal J7, the other end of capacitor C95, the negative electrode of polar capacitor C96, the negative electrode of polar capacitor C97, the other end of capacitor C98, the positive electrode of diode D16, the ON / OFF pin of buck chip U9 and its 4 GND pins are all connected to the GND2 pin of CAN bus isolation chip U10.

[0054] The PA0 pin of the control chip U13 is connected to the cathode of the red light-emitting diode D9 through a resistor R46, and the anode of the red light-emitting diode D9 is connected to the OUT pin of the voltage stabilizing chip U7. The PA1 pin of the control chip U13 is connected to the cathode of the green light-emitting diode D10 through a resistor R47, and the anode of the green light-emitting diode D10 is connected to the OUT pin of the voltage stabilizing chip U7. The PA2 pin of the control chip U13 is connected to the cathode of the yellow light-emitting diode D11 through a resistor R48, and the anode of the yellow light-emitting diode D11 is connected to the OUT pin of the voltage stabilizing chip U7.

[0055] The PA3 pin of the control chip U13 is respectively connected to one end of the switch S1, the grounding resistor R62 and the grounding capacitor C88, the other end of the switch S1 is connected to the OUT pin of the voltage stabilizing chip U7, the PA4 pin of the control chip U13 is connected to the other end of the resistor R55, the PA5 pin of the control chip U13 is connected to the other end of the resistor R54, the PA6 pin of the control chip U13 is connected to the other end of the resistor R53, and the PA7 pin of the control chip U13 is connected to the other end of the resistor R52; the PA13 pin of the control chip U13 is connected to the 4th pin of the wiring terminal J6, the PA14 pin of the control chip U13 is connected to the 2nd pin of the wiring terminal J6, the 3rd pin of the wiring terminal J6 is grounded, and the 1st pin of the wiring terminal J6 is connected to the OUT pin of the voltage stabilizing chip U7.

[0056] The OSC_IN pin of the control chip U13 is respectively connected to one end of the crystal oscillator X2 and the grounding capacitor C86, the OSC_OUT pin of the control chip U13 is respectively connected to the other end of the crystal oscillator X2 and the grounding capacitor C87, the BOOT0 pin of the control chip U13 is respectively connected to one end of the resistor R57 and the grounding resistor R58, the other end of the resistor R57 is connected to the OUT pin of the voltage stabilizing chip U7, the NRST pin of the control chip U13 is respectively connected to one end of the resistor R62, the positive electrode of the diode D18 and the grounding capacitor C99, the other end of the resistor R62 is respectively connected to the negative electrode of the diode D18 and the OUT pin of the voltage stabilizing chip U7, The VBAT pin of the control chip U13 is connected to its VDD_1 pin, VDD_2 pin and VDD_3 pin respectively, the VDDA pin of the control chip U13 is connected to one end of the inductor L12, the grounding capacitor C89 and the grounding capacitor C90 respectively, the other end of the inductor L12 is connected to the VBAT pin of the control chip U13 and the OUT pin of the voltage regulator chip U7 respectively, the PB0 pin of the control chip U13 is connected to the other end of the resistor R56, the PB2 pin of the control chip U13 is connected to the grounding resistor R59, and the VSS_1 pin, VSS_2 pin, VSS_3 pin and VSSA pin of the control chip U13 are all grounded.

[0057] The OUT pin of the voltage stabilizing chip U7 is respectively connected to a grounding capacitor C82, a grounding capacitor C100, a grounding capacitor C101, a grounding capacitor C102, a grounding capacitor C103, a grounding capacitor C104 and a grounding capacitor C105.

[0058] In this embodiment, the thermistor Re1, the thermistor Re2 and the thermistor Re3 are all of the model XH-T107, the temperature sensor H1, the temperature sensor H2 and the temperature sensor H3 are all of the model DS18B20, the inductor L6, the inductor L7, the inductor L8 and the inductor L9 are all of the model SMNR5040-101MT, the Schottky diode D1 is of the model G40E100CTFW, the thermal protection switch KSD is of the model The model used by the FET Q1 is SE85210GA, the model used by the transistor Q2 is S8550, the models used by the TVS diode D8, TVS diode D9, TVS diode D12, TVS diode D13, TVS diode D14 and TVS diode D15 are SM6T6V8CA, the model used by the common-mode inductor T1 is ACM3225-601-2P, and the model used by the common-mode inductor T2 is SMW3225S102HTE, the control chip U1 uses the model STM32F103C8T6, the voltage regulator chip U2 uses the model 7805, the AD conversion chip U3 uses the model ADS1220IPW, the CAN bus isolation chip U4 uses the model ISO1050DUB, the isolation power chip U5 uses the model B0505S-W5, the voltage regulator chip U6 and the voltage regulator chip U7 use the model AMS1117 -3.3, the AD conversion chip U8 uses the model ADS1220IPW, the buck chip U9 uses the model XL1509-5.0E1, the CAN bus isolation chip U10 uses the model ISO1050DUB, the chip U11 uses the model π132U31, the RS485 transceiver chip U12 uses the model SN65HVD3082EDR, and the control chip U13 uses the model STM32F103C8T6.

[0059] The working principle of the present invention is as follows: when monitoring the status of a single battery, the temperature change of the battery electrode is reflected by the change of the thermistor, and the temperature change signal is respectively input into the first control module and the first AD conversion module, and the voltage signal of the battery is transmitted to the first AD conversion module through the voltage signal input module, and then the single battery is used and a +5V power supply module is used to produce a +5V voltage, and the first isolation power supply module and the first +3.3V power supply module are powered by the +5V power supply module, and the +5V digital circuit power supply is converted into a +5V analog circuit power supply by the first isolation power supply module, and the first CAN communication module is powered by the first isolation power supply module, and the +5V voltage is converted into a +3.3V voltage by the first +3.3V power supply module and the first control module, the first CAN communication module and the temperature signal input module are powered respectively, and the discharge control is performed by the discharge control module, and the first CAN communication module communicates with the monitoring. When monitoring the status of the battery pack, the current sensor PA is powered by the current sensor power supply module, the series current of the battery pack is monitored by the current detection module, the battery pack voltage is monitored by the battery pack voltage detection module, and the voltage monitoring signal is transmitted to the second AD conversion module, and the RS485 communication module, the second CAN communication module, the current sensor power supply module and the second isolation power supply module are powered by the +5V analog power supply module, the second +3.3V power supply module is powered by the second isolation power supply module, and the RS485 communication module is powered by the second +3.3V power supply module. The module, the second control module, the second AD conversion module and the temperature measurement module are powered, the series current of the battery pack is processed by the current signal processing module, and the processed current signal is transmitted to the second AD conversion module, the second AD conversion module processes the current signal and the voltage signal, and transmits the processed current signal and the voltage signal to the second communication module, and then the second communication module communicates with the monitoring machine through the RS485 communication module and the second CAN communication module; when the system is working, the power supply module provides a 220V DC voltage to the monitoring machine and a 24V DC voltage to the +5V analog power supply module.

[0060] The present invention has a simple structure and is easy to implement. It can monitor various states of batteries and battery packs respectively, can accurately monitor the voltage and temperature of single batteries, and can accurately monitor the current, voltage and temperature of battery packs. The monitoring signals of batteries and battery packs are analyzed by a monitoring machine to promptly detect faulty batteries. A plurality of diodes are provided to realize freewheeling protection of the battery pack, thereby ensuring the normal operation of the battery pack.

[0061] The present invention accurately monitors the temperature of the battery by arranging multiple thermistors and temperature sensors. When a short circuit fault occurs in the battery, it can be discovered and continuous current protection can be performed in the first time, thereby avoiding short circuit fire faults and avoiding the problem of battery pack failure to work due to short circuit of single battery cells.

Claims

1. A battery pack status monitoring system, characterized in that: It includes a battery pack Es, a temperature signal input module, a voltage signal input module, a discharge control module, a +5V power supply module, a first isolated power supply module, a first +3.3V power supply module, a first AD conversion module, a first control module, a first CAN communication module, a power supply module, a monitoring machine, a +5V analog power supply module, a second +3.3V power supply module, a second isolated power supply module, a current sensor power supply module, a current signal processing module, a current detection module, a temperature measurement module, a battery pack voltage detection module, a second AD conversion module, a second control module, an RS485 communication module, and a second CAN communication module; The battery pack Es includes a battery E1, a battery E2 and a battery E3 which are connected in sequence, the positive electrode of the battery E1 is the positive electrode of the battery pack Es, and the negative electrode of the battery E3 is the negative electrode of the battery pack Es; the temperature measurement module includes a first temperature measurement unit, a second temperature measurement unit and a third temperature measurement unit, the first temperature measurement unit is fixed to the negative electrode of the battery E1 through a temperature sensor H1, the second temperature measurement unit is fixed to the negative electrode of the battery E2 through a temperature sensor H2, and the third temperature measurement unit is fixed to the negative electrode of the battery E3 through a temperature sensor H3; The temperature signal input module is fixed to the negative electrode of the battery E1, the negative electrode of the battery E2 and the negative electrode of the battery E3 in one-to-one correspondence through thermistors Re1, Re2 and Re3, respectively; the positive electrode of the battery E1 is connected to the negative electrode of the freewheeling diode Dx1, one end of the switch K1 and one end of the switch K8, the positive electrode of the battery E2 is connected to the positive electrode of the freewheeling diode Dx1, the negative electrode of the freewheeling diode Dx2, one end of the switch K2 and one end of the switch K7, the positive electrode of the battery E3 is connected to the positive electrode of the freewheeling diode Dx2, the negative electrode of the freewheeling diode Dx3, one end of the switch K3 and one end of the switch K6, the negative electrode of the battery E3 is connected to the positive electrode of the freewheeling diode Dx3, one end of the switch K4 and one end of the switch K5, and the other end of the switch K5, the other end of the switch K6, the other end of the switch K7 and the other end of the switch K8 are connected to the voltage signal input module respectively; The other end of the switch K1 is respectively connected to the other end of the switch K3, the discharge control module and the +5V power supply module, the other end of the switch K2 is respectively connected to the other end of the switch K4, the discharge control module and the +5V power supply module, the current detection module is connected to the wire connected to the positive electrode of the battery pack Es through the current sensor PA, and the battery pack voltage detection module is respectively connected to the positive electrode and the negative electrode of the battery pack Es; The discharge control module is respectively connected to the first AD conversion module and the first control module, the +5V power supply module is respectively connected to the first isolation power supply module and the first +3.3V power supply module, the first isolation power supply module is connected to the first CAN communication module, the first +3.3V power supply module is respectively connected to the first AD conversion module, the first control module, the first CAN communication module and the temperature signal input module, the first AD conversion module is respectively connected to the voltage signal input module, the temperature signal input module and the first control module, the first control module is respectively connected to the temperature signal input module and the first CAN communication module, and the first CAN communication module is connected to the monitoring machine; The power supply module is connected to the monitoring machine and the +5V analog power supply module respectively, and is used to provide 220V DC power to the monitoring machine and 24V DC power to the +5V analog power supply module; The +5V analog power supply module is respectively connected to the RS485 communication module, the second CAN communication module and the current sensor power supply module, the second isolation power supply module is respectively connected to the current sensor power supply module and the second +3.3V power supply module, the second +3.3V power supply module is respectively connected to the RS485 communication module, the second CAN communication module, the second control module, the second AD conversion module, the first temperature measurement unit, the second temperature measurement unit and the third temperature measurement unit, the current sensor power supply module is connected to the current detection module, the current detection module is connected to the current signal processing module, the current signal processing module is connected to the second AD conversion module, the battery pack voltage detection module is connected to the second AD conversion module, the second AD conversion module is connected to the second control module, the second control module is respectively connected to the RS485 communication module and the second CAN communication module, the RS485 communication module is connected to the second CAN communication module, and the RS485 communication module and the second CAN communication module are both connected to the monitoring machine.

2. The battery pack status monitoring system according to claim 1, characterized in that: The positive electrode of the battery E1 is connected to the first pin and the third pin of the terminal J1 respectively, the negative electrode of the battery E1 is connected to the second pin and the fourth pin of the terminal J1 respectively, one end of the thermistor Re1 is connected to the fifth pin of the terminal J1, the other end of the thermistor Re1 is connected to the sixth pin of the terminal J1, the first pin of the terminal J1 is connected to one end of the fuse FU1 and one end of the fuse FU2 respectively, the second pin of the terminal J1 is connected to one end of the resistor R10, one end of the resistor R11, and the first positive electrode and the second positive electrode of the Schottky diode D1 respectively; The discharge control module includes a thermal protection switch KSD, one end of which is respectively connected to the other end of the fuse FU1, the cathode of the Schottky diode D1, one end of the resistor R2, one end of the resistor R4 and one end of the resistor R5, the other end of the thermal protection switch KSD is connected to the drain of the field effect tube Q1 through the resistor R1, the other end of the resistor R2 is respectively connected to the grounding resistor R3, the cathode of the diode D2 and the PA0 pin of the control chip U1 in the first control module, the anode of the diode D2 is grounded, the source of the field effect tube Q1 is respectively connected to the other end of the resistor R10, one end of the capacitor C1 and one end of the resistor R12, the other end of the resistor R12 is respectively connected to one end of the capacitor C2 and the AIN2 pin of the AD conversion chip U3 in the first AD conversion module, the gate of the field effect tube Q1 is respectively connected to the transistor The collector of Q2 is connected to one end of the resistor R13, the emitter of the transistor Q2 is connected to the other end of the resistor R4, the base of the transistor Q2 is respectively connected to the other end of the resistor R5 and the collector of the transistor Q3 through the resistor R6, the base of the transistor Q3 is connected to one end of the resistor R7, the other end of the resistor R7 is respectively connected to one end of the resistor R8, the cathode of the diode D3 and the grounded capacitor C3, the anode of the diode D3 is respectively connected to the cathode of the diode D4 and one end of the capacitor C4, the anode of the diode D4 is connected to one end of the resistor R9, the other end of the capacitor C4 is connected to the PA3 pin of the control chip U1, the other end of the resistor R11, the other end of the capacitor C1, the other end of the capacitor C2, the other end of the resistor R13, the emitter of the transistor Q3, the other end of the resistor R8 and the other end of the resistor R9 are all grounded; The +5V power supply module includes a diode D5, the positive electrode of the diode D5 is connected to the other end of the fuse FU2, the negative electrode of the diode D5 is respectively connected to one end of the capacitor C5, the positive electrode of the polar capacitor C6 and the Vin pin of the voltage stabilizing chip U2, the Vout pin of the voltage stabilizing chip U2 is a +5V voltage output terminal, the Vout pin of the voltage stabilizing chip U2 is respectively connected to the positive electrode of the polar capacitor C7 and one end of the capacitor C8, the other end of the capacitor C5, the negative electrode of the polar capacitor C6, the GND pin of the voltage stabilizing chip U2, the negative electrode of the polar capacitor C7 and the other end of the capacitor C8 are all grounded; The voltage signal input module includes a resistor R14 and a resistor R15, one end of the resistor R14 is connected to the third pin of the wiring terminal J1, the other end of the resistor R14 is respectively connected to one end of the resistor R15, one end of the resistor R16 and one end of the capacitor C9, the other end of the resistor R16 is respectively connected to one end of the capacitor C10 and the AIN1 pin of the AD conversion chip U3, and the fourth pin of the wiring terminal J1, the other end of the resistor R15, the other end of the capacitor C19 and the other end of the capacitor C10 are all grounded.

3. The battery pack status monitoring system according to claim 2, characterized in that: The temperature signal input module includes a resistor R17, one end of which is respectively connected to the 5th pin of the wiring terminal J1, one end of the resistor R18, one end of the resistor R19 and the grounding capacitor C11, the other end of the resistor R17 is connected to the OUT pin of the voltage stabilizing chip U6 in the first +3.3V power supply module, the other end of the resistor R18 is connected to the PA1 pin of the control chip U1, the other end of the resistor R19 is respectively connected to the grounding capacitor C12 and the AIN0 pin of the AD conversion chip U3, and the 6th pin of the wiring terminal J1 is grounded; The first AD conversion module includes an AD conversion chip U3, the AVDD pin of the AD conversion chip U3 is respectively connected to one end of the capacitor C14, one end of the capacitor C15 and one end of the inductor L1, the other end of the inductor L1 is connected to the OUT pin of the voltage stabilizing chip U6, the AVSS pin of the AD conversion chip U3 is respectively connected to the other end of the capacitor C14, the other end of the capacitor C15 and one end of the inductor L2, the other end of the inductor L2 is grounded, the DIN pin of the AD conversion chip U3 is respectively connected to one end of the grounded capacitor C17 and a resistor R21, the DOUT pin of the AD conversion chip U3 is connected to one end of the resistor R22, the SCLK pin of the AD conversion chip U3 is respectively connected to one end of the grounded capacitor C16 and a resistor R23, and the The pins are connected to one end of the grounding capacitor C18 and one end of the resistor R24 ​​respectively. The pin is connected to one end of the resistor R25, the CLK pin of the AD conversion chip U3 is grounded, the DVDD pin of the AD conversion chip U3 is respectively connected to one end of the capacitor C19, one end of the capacitor C20 and the OUT pin of the voltage stabilizing chip U6, and the DGND pin of the AD conversion chip U3, the other end of the capacitor C19 and the other end of the capacitor C20 are all grounded; The other end of the resistor R21 is connected to the PA7 pin of the control chip U1, the other end of the resistor R22 is connected to the PA6 pin of the control chip U1, the other end of the resistor R23 is connected to the PA5 pin of the control chip U1, the other end of the resistor R24 ​​is connected to the PA4 pin of the control chip U1, and the other end of the resistor R25 is connected to the PB0 pin of the control chip U1.

4. The battery pack status monitoring system according to claim 3, characterized in that: The first CAN communication module includes a CAN bus isolation chip U4, the Vcc1 pin of the CAN bus isolation chip U4 is respectively connected to the OUT pin of the voltage stabilizing chip U6, the grounding capacitor C26 and the grounding capacitor C27, the RXD pin of the CAN bus isolation chip U4 is connected to the PA11 pin of the control chip U1, the TXD pin of the CAN bus isolation chip U4 is connected to the PA12 pin of the control chip U1, the GND pin of the CAN bus isolation chip U4 is grounded, the Vcc2 pin of the CAN bus isolation chip U4 is respectively connected to one end of the inductor L5, one end of the capacitor C28 and one end of the capacitor C29, the CANH pin of the CAN bus isolation chip U4 is connected to the common mode inductor The first pin of the common-mode inductor T1 is connected to the first pin of the common-mode inductor T1, the third pin of the common-mode inductor T1 is respectively connected to one end of the TVS diode D9, the first pin and the third pin of the wiring terminal J3, the CANL pin of the CAN bus isolation chip U4 is connected to the second pin of the common-mode inductor T1, the fourth pin of the common-mode inductor T1 is respectively connected to one end of the TVS diode D8, the second pin and the fourth pin of the wiring terminal J3, and the GND2 pin of the CAN bus isolation chip U4 is respectively connected to the other end of the capacitor C28, the other end of the capacitor C29, the other end of the TVS diode D9, the other end of the TVS diode D8, one end of the resistor R99, one end of the capacitor C32, one end of the capacitor C34 and the O pin of the isolation power chip U5; The first isolated power supply module includes an inductor L4 and an isolated power supply chip U5, one end of the inductor L4 is connected to the Vout pin of the voltage stabilizing chip U2, the other end of the inductor L4 is respectively connected to one end of the capacitor C30, one end of the capacitor C31 and the Vin pin of the isolated power supply chip U5, the +Vo pin of the isolated power supply chip U5 is respectively connected to the other end of the capacitor C32, the other end of the resistor R99 and the other end of the inductor L5, one end of the inductor L5 is the analog circuit +5 power output terminal, the other end of the capacitor C30, the other end of the capacitor C31, the other end of the capacitor C34 and the GND pin of the isolated power supply chip U5 are all grounded; The first +3.3V power supply module includes a voltage stabilizing chip U6, an IN pin of the voltage stabilizing chip U6 is respectively connected to the positive electrode of the polarity capacitor C35, one end of the capacitor C36 and the Vout pin of the voltage stabilizing chip U2, an OUT pin of the voltage stabilizing chip U6 is respectively connected to the positive electrode of the polarity capacitor C37 and one end of the capacitor C38, the OUT pin of the voltage stabilizing chip U6 is a +3.3V voltage output terminal, and the negative electrode of the polarity capacitor C35, the other end of the capacitor C36, the negative electrode of the polarity capacitor C37, the other end of the capacitor C38 and the GND pin of the voltage stabilizing chip U2 are all grounded.

5. The battery pack status monitoring system according to claim 4, characterized in that: The first control module includes a control chip U1, wherein the PA13 pin of the control chip U1 is connected to the 4th pin of the wiring terminal J2, the PA14 pin of the control chip U1 is connected to the 2nd pin of the wiring terminal J2, the 3rd pin of the wiring terminal J2 is grounded, the 1st pin of the wiring terminal J2 is connected to the OUT pin of the voltage regulator chip U6, the OSC_IN pin of the control chip U1 is respectively connected to one end of the crystal oscillator X1 and the grounding capacitor C21, the OSC_OUT pin of the control chip U1 is respectively connected to the other end of the crystal oscillator X1 and the grounding capacitor C22, the BOOT0 pin of the control chip U1 is respectively connected to the grounding resistor R28 and one end of the resistor R27, the other end of the resistor R27 is connected to the O UT pin is connected, the NRST pin of the control chip U1 is respectively connected to the grounding capacitor C23, the positive electrode of the diode D7 and one end of the resistor R26, the negative electrode of the diode D7 and the other end of the resistor R26 are connected to the OUT pin of the voltage stabilizing chip U6, the VBAT pin, VDD_1 pin, VDD_2 pin and VDD_3 pin of the control chip U1 are all connected to the OUT pin of the voltage stabilizing chip U6, the VDDA pin of the control chip U1 is respectively connected to one end of the inductor L3, the grounding capacitor C24 and the grounding capacitor C25, the BOOT1 pin of the control chip U1 is connected to the grounding resistor R29, and the VSS_1 pin, VSS_2 pin, VSS_3 pin and VSSA pin of the control chip U1 are all grounded; The OUT pin of the voltage stabilizing chip U6 is connected to a grounding capacitor C39 , a grounding capacitor C40 , a grounding capacitor C41 , a grounding capacitor C42 , a grounding capacitor C43 and a grounding capacitor C44 respectively.

6. The battery pack status monitoring system according to claim 1, characterized in that: The current detection module includes a current sensor PA, a + pin of the current sensor PA is connected to the 1st pin of the wiring terminal J4, a - pin of the current sensor PA is connected to the 2nd pin of the wiring terminal J4, an M pin of the current sensor PA is connected to the 3rd pin of the wiring terminal J4, and a G pin of the current sensor PA is connected to the 4th pin of the wiring terminal J4; The current sensor power supply module includes a power chip M1. The first pin of the wiring terminal J4 is respectively connected to one end of the capacitor C46, ​​one end of the capacitor C47 and one end of the inductor L6. The second pin of the wiring terminal J4 is respectively connected to one end of the capacitor C46, ​​one end of the capacitor C47 and one end of the inductor L6. The pins are respectively connected to one end of capacitor C48, one end of capacitor C49 and one end of inductor L7, the 3rd pin of the wiring terminal is connected to one end of resistor R60 in the current signal processing module, the 4th pin of the wiring terminal J4 is respectively connected to one end of resistor R30, one end of resistor R34, one end of resistor R35, one end of capacitor C45, the other end of capacitor C46, ​​the other end of capacitor C47, the other end of capacitor C48, the other end of capacitor C49, one end of capacitor C50, one end of capacitor C51, one end of capacitor C52, one end of capacitor C53, one end of capacitor C57, one end of capacitor C58 and the 0V pin of power chip M1, the other end of capacitor C45 is respectively connected to the GND2 pin of CAN bus isolation chip U10 in the second CAN communication module, the other end of inductor L6 is respectively connected to capacitor C The other end of the inductor L7 is connected to the other end of the capacitor C52, the other end of the capacitor C53, the other end of the resistor R35 and the -Vo pin of the power chip M1 respectively; the Vin pin of the power chip M1 is connected to the positive electrode of the polarity capacitor C54, one end of the capacitor C55, one end of the inductor L8 and the Vin pin of the power chip M2 in the second power module respectively; the other end of the inductor L8 is connected to the FEEDBACK pin of the buck chip U9 in the +5V analog power module; the GND pin of the power chip M1 is connected to the negative electrode of the polarity capacitor C54, one end of the capacitor C55, the grounding capacitor C56, the GND pin of the power chip M2 and the GND2 pin of the CAN bus isolation chip U10 respectively; The +Vo pin of the power chip M2 is connected to one end of the inductor L9 and one end of the capacitor C64 respectively, the other end of the inductor L9 is a +5V voltage output terminal, and the O pin of the power chip M2 and the other end of the capacitor C64 are both grounded.

7. The battery pack status monitoring system according to claim 6, characterized in that: The other end of the resistor R60 is respectively connected to the other end of the capacitor C58, one end of the resistor R32 and one end of the resistor R33, the other end of the resistor R30 is respectively connected to one end of the resistor R31, the other end of the resistor R32, one end of the resistor R61 and the other end of the capacitor C57, the other end of the resistor R31 is respectively connected to one end of the capacitor C59, one end of the capacitor C60, one end of the capacitor C62 and the AIN1 pin of the AD conversion chip U8 in the second AD conversion module, the other end of the resistor R33 is respectively connected to the other end of the capacitor C60, one end of the capacitor C61, one end of the capacitor C63 and the AIN0 pin of the AD conversion chip U8, the other end of the capacitor C59 and the other end of the capacitor C62 are both connected to the AVSS pin of the AD conversion chip U8, and the other end of the capacitor C61 and the other end of the capacitor C63 are both connected to the AVDD pin of the AD conversion chip U8; The battery pack voltage measurement module includes a terminal J5, wherein the first pin of the terminal J5 is respectively connected to the positive electrode of the battery pack Es and one end of the resistor R36, the second pin of the terminal J5 is respectively connected to the negative electrode of the battery pack Es and one end of the resistor R37, the other end of the resistor R36 is respectively connected to one end of the capacitor C65, one end of the resistor R38 and one end of the resistor R39, the other end of the resistor R37 is respectively connected to the other end of the capacitor C65, the other end of the resistor R38, one end of the resistor R40 and one end of the resistor R41, the other end of the resistor R39 is respectively connected to one end of the capacitor C66, one end of the capacitor C67 and the AIN2 pin of the AD conversion chip U8, the other end of the resistor R40 is respectively connected to the AIN3 pin of the AD conversion chip U8, and the other end of the resistor R41 is respectively connected to the AIN4 pin of the AD conversion chip U8. The ends are respectively connected to the other end of the capacitor C67, one end of the capacitor C68 and the AIN3 pin of the AD conversion chip U8, the other end of the resistor R41 is respectively connected to one end of the capacitor C70, one end of the resistor R42, one end of the resistor R43 and the other end of the resistor R61, the other end of the capacitor C66 and the other end of the resistor R42 are both connected to the AVDD pin of the AD conversion chip U8, the other end of the capacitor C68, the other end of the capacitor C70 and the other end of the resistor R43 are all connected to the AVSS pin of the AD conversion chip; The second +3.3V power supply module includes a voltage stabilizing chip U7, the IN pin of the voltage stabilizing chip U7 is respectively connected to the positive electrode of the polarity capacitor C71, one end of the capacitor C72 and the other end of the inductor L9, the OUT pin of the voltage stabilizing chip U7 is a +3.3V voltage output terminal, and is respectively connected to the positive electrode of the polarity capacitor C73 and one end of the capacitor C74, the negative electrode of the polarity capacitor C71, the other end of the capacitor C72, the negative electrode of the polarity capacitor C73, the other end of the capacitor C74 and the GND pin of the voltage stabilizing chip U7 are all grounded; The AVDD pin of the AD conversion chip U8 is respectively connected to one end of the capacitor C75, one end of the capacitor C76 and one end of the inductor L10, the other end of the inductor L10 is connected to the OUT pin of the voltage stabilizing chip U7, the AVSS pin of the AD conversion chip U8 is respectively connected to the other end of the capacitor C76, the other end of the capacitor C75 and one end of the inductor L11, the other end of the inductor L11 is grounded, the DIN pin of the AD conversion chip U8 is respectively connected to the grounded capacitor C78 and one end of the resistor R52, the DOUT pin of the AD conversion chip U8 is connected to one end of the resistor R53, the SCLK pin of the AD conversion chip U8 is respectively connected to the grounded capacitor C77 and one end of the resistor R54, the The pins are connected to the ground capacitor C79 and one end of the resistor R55 respectively. The pin is connected to one end of the resistor R56, the CLK pin of the AD conversion chip U8 is grounded, the DVDD pin of the AD conversion chip U8 is respectively connected to one end of the capacitor C80, one end of the capacitor C81 and the OUT pin of the voltage regulator chip U7, and the DGND pin of the AD conversion chip U8, the other end of the capacitor C80 and the other end of the capacitor C81 are all grounded.

8. The battery pack status monitoring system according to claim 7, characterized in that: The first temperature measurement unit includes a temperature sensor H1, wherein the first pin of the temperature sensor H1 is respectively connected to one end of a resistor R44, a grounding capacitor C69 and an OUT pin of a voltage stabilizing chip U7, the second pin of the temperature sensor H1 is respectively connected to the other end of the resistor R44 and one end of a resistor R45, the other end of the resistor R45 is respectively connected to the cathode of a diode D8 and a PB12 pin of a control chip U13 in a second control module, and the third pin of the temperature sensor H1 and the anode of the diode D8 are both grounded; The RS485 communication module includes a chip U11 and an RS485 transceiver chip U12, the VDD1 pin of the chip U11 is connected to the OUT pin of the voltage stabilizing chip U7, the two GND1 pins of the chip U11 are both grounded, the Voa of the chip U11 is connected to the PA10 pin of the control chip U13, the Vib of the chip U11 is connected to the PA8 pin of the control chip U13, the Vic of the chip U11 is connected to the PA9 pin of the control chip U13, the VDD2 pin of the chip U11 is respectively connected to one end of the grounding capacitor C83 and the resistor R49, the two GND2 pins of the chip U11 are both grounded, the Via pin of the chip U11 is connected to the R pin of the RS485 transceiver chip U12, the Vob pin of the chip U11 is respectively connected to the The Voc pin of the chip U11 is connected to the D pin of the RS485 transceiver chip U12; The other end of the resistor R49 is respectively connected to one end of the capacitor C84 and the FEEDBACK pin of the buck chip U9, the other end of the capacitor C84 is respectively connected to one end of the resistor R50, the GND2 pin of the CAN bus isolation chip U10 and the GND pin of the RS485 transceiver chip U12, the B pin of the RS485 transceiver chip U12 is respectively connected to the other end of the resistor R50, one end of the fuse FU3 and one end of the TVS diode D13, the A pin of the RS485 transceiver chip U12 is respectively connected to one end of the resistor R51, the fuse FU 4 is connected to one end of the TVS diode D12, the Vcc pin of the RS485 transceiver chip U12 is respectively connected to the other end of the resistor R51, one end of the capacitor C85 and the FEEDBACK pin of the buck chip U9, the other end of the capacitor C85, the other end of the TVS diode D12 and the other end of the TVS diode D13 are all connected to the GND2 pin of the CAN bus isolation chip U10, the other end of the fuse FU3 is connected to the 4th pin of the wiring terminal J7, and the other end of the fuse FU4 is connected to the 3rd pin of the wiring terminal J7.

9. The battery pack status monitoring system according to claim 8, characterized in that: The second CAN communication module includes a CAN bus isolation chip U10, the Vcc1 pin of the CAN bus isolation chip U10 is respectively connected to the grounding capacitor C91, the grounding capacitor C92 and the OUT pin of the voltage regulator chip U7, the RXD pin of the CAN bus isolation chip U10 is connected to the PA11 pin of the control chip U13, the TXD pin of the CAN bus isolation chip U10 is connected to the PA12 pin of the control chip U13, the GND1 pin of the CAN bus isolation chip U10 is grounded, the Vcc2 pin of the CAN bus isolation chip U10 is respectively connected to one end of the capacitor C93, one end of the capacitor C94 and the FEEDBACK pin of the step-down chip U9, and the capacitor C9 The other end of the capacitor C94 is connected to the GND2 pin of the CAN bus isolation chip U10, the CANH pin of the CAN bus isolation chip U10 is connected to the 1st pin of the common mode inductor T2, the CANL pin of the CAN bus isolation chip U10 is connected to the 2nd pin of the common mode inductor T2, the 3rd pin of the common mode inductor T2 is respectively connected to one end of the TVS diode D15 and the 1st pin of the wiring terminal J7, the 4th pin of the common mode inductor T2 is respectively connected to one end of the TVS diode D14 and the 2nd pin of the wiring terminal J7, the other end of the TVS diode D14 and the other end of the TVS diode D15 are both connected to the GND2 pin of the CAN bus isolation chip U10; The FEEDBACK pin of the buck chip U9 is the +5V analog circuit voltage output terminal, which is respectively connected to one end of capacitor C95, the positive electrode of polar capacitor C96 and one end of inductor L13, the OUTPUT pin of the buck chip U9 is respectively connected to the other end of inductor L13 and the negative electrode of diode D16, the Vin pin of the buck chip U9 is respectively connected to the positive electrode of polar capacitor C97, one end of capacitor C98 and the negative electrode of diode D17, the positive electrode of diode D17 is connected to the 6th pin of terminal J7 through fuse FU5, the 5th pin of terminal J7, the other end of capacitor C95, the negative electrode of polar capacitor C96, the negative electrode of polar capacitor C97, the other end of capacitor C98, the positive electrode of diode D16, the ON / OFF pin of buck chip U9 and its 4 GND pins are all connected to the GND2 pin of CAN bus isolation chip U10.

10. The battery pack status monitoring system according to claim 9, characterized in that: The PA0 pin of the control chip U13 is connected to the cathode of the red light-emitting diode D9 through a resistor R46, and the anode of the red light-emitting diode D9 is connected to the OUT pin of the voltage stabilizing chip U7. The PA1 pin of the control chip U13 is connected to the cathode of the green light-emitting diode D10 through a resistor R47, and the anode of the green light-emitting diode D10 is connected to the OUT pin of the voltage stabilizing chip U7. The PA2 pin of the control chip U13 is connected to the cathode of the yellow light-emitting diode D11 through a resistor R48, and the anode of the yellow light-emitting diode D11 is connected to the OUT pin of the voltage stabilizing chip U7. The PA3 pin of the control chip U13 is respectively connected to one end of the switch S1, the grounding resistor R62 and the grounding capacitor C88, the other end of the switch S1 is connected to the OUT pin of the voltage stabilizing chip U7, the PA4 pin of the control chip U13 is connected to the other end of the resistor R55, the PA5 pin of the control chip U13 is connected to the other end of the resistor R54, the PA6 pin of the control chip U13 is connected to the other end of the resistor R53, and the PA7 pin of the control chip U13 is connected to the other end of the resistor R52; the PA13 pin of the control chip U13 is connected to the 4th pin of the wiring terminal J6, the PA14 pin of the control chip U13 is connected to the 2nd pin of the wiring terminal J6, the 3rd pin of the wiring terminal J6 is grounded, and the 1st pin of the wiring terminal J6 is connected to the OUT pin of the voltage stabilizing chip U7; The OSC_IN pin of the control chip U13 is respectively connected to one end of the crystal oscillator X2 and the grounding capacitor C86, the OSC_OUT pin of the control chip U13 is respectively connected to the other end of the crystal oscillator X2 and the grounding capacitor C87, the BOOT0 pin of the control chip U13 is respectively connected to one end of the resistor R57 and the grounding resistor R58, the other end of the resistor R57 is connected to the OUT pin of the voltage stabilizing chip U7, the NRST pin of the control chip U13 is respectively connected to one end of the resistor R62, the positive electrode of the diode D18 and the grounding capacitor C99, the other end of the resistor R62 is respectively connected to the negative electrode of the diode D18 and the OUT pin of the voltage stabilizing chip U7, The VBAT pin of the control chip U13 is connected to its VDD_1 pin, VDD_2 pin and VDD_3 pin respectively, the VDDA pin of the control chip U13 is connected to one end of the inductor L12, the grounding capacitor C89 and the grounding capacitor C90 respectively, the other end of the inductor L12 is connected to the VBAT pin of the control chip U13 and the OUT pin of the voltage regulator chip U7 respectively, the PB0 pin of the control chip U13 is connected to the other end of the resistor R56, the PB2 pin of the control chip U13 is connected to the grounding resistor R59, and the VSS_1 pin, VSS_2 pin, VSS_3 pin and VSSA pin of the control chip U13 are all grounded; The OUT pin of the voltage stabilizing chip U7 is respectively connected to a grounding capacitor C82, a grounding capacitor C100, a grounding capacitor C101, a grounding capacitor C102, a grounding capacitor C103, a grounding capacitor C104 and a grounding capacitor C105.

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