New energy automobile charging pile analog signal acquisition circuit

Abstract

A new energy automobile charging pile analog signal acquisition circuit comprises a power supply circuit, and is characterized in that the new energy automobile charging pile analog signal acquisition circuit is arranged in a system; the signal acquisition circuit is composed of an STM32F103C8T6 single-chip microcomputer U1, a pin 1 of the single-chip microcomputer U1 is connected with a 3.3 VMCU, and a pin 12 of the U1 is connected with one end of a resistor R30 and one end of a capacitor C20 in the charging module output end voltage detection circuit. A pin 11 and a pin 10 of the STM32F103C8T6 single chip microcomputer U1 are respectively connected with one end of a resistor R42 and one end of a capacitor C27 in the new energy automobile battery voltage detection circuit and one end of a resistor R52 and one end of a capacitor C38 in the charging current detection circuit; and a pin 34 and a pin 37 of the single chip microcomputer U1 are connected with a pin 2 and a pin 3 of an ADUM1201 digital isolation optical coupler chip U31 in the CAN communication circuit. The beneficial effects of the utility model are that centralized acquisition, unified uploading and transmission of multipath analog signals in the charging process of the charging pile are realized, and complete isolation of digital signals and analog signals is realized; high-voltage strong current and weak current are separated, and the safety of workers is guaranteed; operation is convenient and fast, and anti-interference capability is strong.

Description

Technical Field

[0001] The utility model belongs to a collection circuit, in particular to a new energy vehicle charging pile analog signal collection circuit. Background Art

[0002] With the continuous development of new energy technology, new energy charging piles have ushered in a huge market, and the functions of charging piles have been continuously enhanced. People have higher and higher requirements for the convenience and safety of charging new energy vehicles, which puts higher and higher requirements on the acquisition of analog signals from charging piles. The traditional analog signal acquisition circuit of new energy vehicle charging piles is easily interfered, and analog signals cannot be collected centrally. There are serious safety hazards when high voltage and weak current are mixed together. Summary of the invention

[0003] The purpose of the utility model is to solve the above-mentioned technical problems and provide a new energy vehicle charging pile analog signal centralized collection, unified upload processing, and realize the modularization of the charging pile circuit; the analog signal includes: charging current detection, charging module output voltage detection, battery output voltage detection, CC, CP detection, insulation detection and charging gun temperature detection, etc., a new energy vehicle charging pile analog signal acquisition circuit.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a new energy vehicle charging pile analog signal acquisition circuit, including a power supply circuit, characterized in that the new energy vehicle charging pile analog signal acquisition circuit is arranged in the system; the new energy vehicle charging pile analog signal acquisition circuit is composed of an STM32F103C8T6 single-chip microcomputer U1, pin 1 of the single-chip microcomputer U1 is connected to 3.3V_MCU, pin 3 is connected to 2 ends of a light-emitting diode D1, end 1 of the light-emitting diode D1 is connected to one end of a resistor R18, the other end of the resistor R18 is connected to 3.3V_MCU, pin 7 of the STM32F103C8T6 single-chip microcomputer U1 is connected to a capacitor C5 and one end of a resistor R13, the other end of the capacitor C5 is grounded, the other end of the resistor R13 is connected to 3.3V_MCU, and pin 20 is connected to one end of a resistor R11 , the other end of resistor R11 is connected to one end of resistor R12, pin 44 is connected to one end of resistor R9, the other end of resistor R9 is connected to one end of resistor R10, the other ends of resistor R10 and resistor R12 are both grounded, pin 5 is connected to pin 1 of SMD-8MHZ3225-4P passive crystal oscillator Y1 and one end of capacitor C3, pin 6 is connected to pin 3 of SMD-8MHZ3225-4P passive crystal oscillator Y1 and one end of capacitor C4, the other ends of capacitors C3 and C4 are connected to pin 4 and pin 2 of SMD-8MHZ3225-4P passive crystal oscillator Y1 and grounded, pins 32 and 33 are connected to pins 2 and 3 of SWD1 socket respectively, pin 1 of SWD1 socket is connected to 3.3V_MCU, pin 4 is grounded, pin 42 is connected to one end of resistor R7 and 24LC256T-ISN Pin 6 and 43 of EEPROM chip U3 are connected to one end of resistor R8 and 24LC256T-ISN. Pin 5 of EEPROM chip U3 is connected. The other end of resistors R7 and R8 is connected to one end of capacitor C2, 3.3V_MCU and 24LC256T-ISN. Pin 8 of EEPROM chip U3 is connected. The other end of capacitor C2 is connected to pin 7 of U3 and ground. Pins 1, 2, 3, and 4 of the EEPROM chip U3 are grounded, pin 21 of U1 is connected to one end of resistor R14 and pin 5 of KF1002-04P-R3GLG-DFT-02B DIP switch SW1, pin 2 is connected to one end of resistor R17 and pin 6 of KF1002-04P-R3GLG-DFT-02B DIP switch SW1, pin 45 is connected to one end of resistor R16 and pin 7 of KF1002-04P-R3GLG-DFT-02B DIP switch SW1, pin 46 is connected to one end of resistor R15 and pin 8 of KF1002-04P-R3GLG-DFT-02B DIP switch SW1, and the other ends of resistors R14, R15, R16, and R17 are all connected to 3.3V_MCU, SW1- KF1002-04P-R3GLG-DFT-02B The 1, 2, 3, and 4 pins of the DIP switch SW1 are all grounded; The 12th pin of the STM32F103C8T6 microcontroller U1 is connected to the resistor R30 and one end of the capacitor C20 in the voltage detection circuit 1 of the charging module output end; The 11th and 10th pins of the microcontroller U1 are respectively connected to the resistor R42, one end of the capacitor C27 and one end of the resistor R52, and one end of the capacitor C38 in the battery voltage detection circuit and the charging current detection circuit 2 of the new energy vehicle charging pile; The 15th pin of the STM32F103C8T6 microcontroller U1 is connected to the resistor R78 and one end of the capacitor C49 in the charging gun temperature detection circuit 3, the 19th pin is connected to the resistor R70 and one end of the capacitor C46, ​​and the 18th pin is connected to the resistor R62 and one end of the capacitor C44; STM32F103C8T6 Pin 13 of the single-chip microcomputer U1 is connected to one end of the resistor R85 and capacitor C56 in the cc and cp detection circuit 4, and pin 14 is connected to one end of the resistor R93 and capacitor C59; Pins 34 and 37 of the STM32F103C8T6 single-chip microcomputer U1 are connected to pins 2 and 3 of the ADUM1201 digital isolation optocoupler chip U31 in the CAN communication circuit 5; Pins 25, 26, 27, 28, 29 and 4 of the STM32F103C8T6 single-chip microcomputer U1 are respectively connected to mcu_isu1_k4, mcu_isu1_k5, mcu_isu1_k0, mcu_isu1_k1, mcu_isu1_k3 and mcu_isu1_k2, 17, 16 in the charging pile insulation detection circuit 7. , 38, 39, 41 and 40 pins are connected to one end of resistors R6, R5, R4, R3, R2 and R1 respectively; the other end of resistor R6 is connected to pin 5 of ADS1118IDGSR 16-bit analog-to-digital conversion chip U2 and mcu_adc_1#isu+ in the insulation detection circuit, the other end of resistor R5 is connected to pin 4 of ADS1118IDGSR 16-bit analog-to-digital conversion chip U2 and mcu_adc_1#isu- in the insulation detection circuit, the other ends of resistors R4, R3, R2 and R1 are connected to pins 2, 1, 10 and 9 of ADS1118IDGSR 16-bit analog-to-digital conversion chip U2 respectively; pin 8 of ADS1118IDGSR 16-bit analog-to-digital conversion chip U2 is connected to one end of capacitor C1 and 3.3V_MCU, and the other end of capacitor C1 is grounded; ADS1118IDGSR Pin 3 of the 16-bit analog-to-digital conversion chip U2 is grounded; Pins 31, 30, and 22 of the STM32F103C8T6 microcontroller U1 are connected to mcu_uart1_rx, mcu_uart1_tx, and mcu_uart1_dr respectively; Pins 8, 23, 35, and 47 of the STM32F103C8T6 microcontroller U1 are grounded, and Pins 9, 24, 36, and 48 of U1 are connected to one end of capacitors C6, C7, C8, C9, and C12, one end of resistors R19 and R20, and DC 5V to DC 3.3V linear voltage regulator chip LM1117-3.3-SO223 U5's 2nd and 4th pins and 3.3V_MCU; the other end of capacitors C6, C7, C8, and C9 are grounded; the other end of resistor R19 is connected to the 1st end of the chip light-emitting diode D2; DC 5V to DC 3.3V linear voltage regulator chip LM1117-3.3-SO223 U5's 3rd pin is connected to the 3rd pin of the DC 15V to DC 5V linear voltage regulator chip 7805 U4, one end of capacitors C10 and C11 and 5V_MCU; DC 15V to DC 5V linear voltage regulator chip 7805U4's 1st pin is connected to one end of capacitors C13 and C14 and one end of inductor B1, and the other end of inductor B1 is connected to +15V; DC 5V to DC 3.3V linear voltage regulator chip LM1117-3.3-SO223 Pin 1 of U5 is connected to the 2nd end of the chip light emitting diode D2, the other end of the resistor R20, the other end of the capacitors C12, C11, C10, C13, C14, the 2nd end of the DC 15V to DC 5V linear voltage regulator chip 7805 U4 and grounded.

[0005] The analog signal acquisition circuit of the new energy vehicle charging pile includes a voltage detection circuit 1 at the output end of the charging module of the new energy vehicle charging pile. The other end of the capacitor C20 in the circuit is grounded, and the other end of the resistor R30 is connected to the 3rd pin of the series switching diode U8 and one end of the resistor R29. The 2nd pin of the series switching diode U8 is connected to 3.3V_MCU, and the 1st pin is grounded. The other end of the resistor R29 is connected to the resistor R21, one end of the capacitor C16 and the 1st pin of the TPA1862-SR dual-channel operational amplifier chip U7A. The 3rd pin of the TPA1862-SR dual-channel operational amplifier chip U7A is grounded and the 5th pin of the HCNR200 isolation optical coupler chip UA1 and one end of the capacitor C21. The 4th pin of the TPA1862-SR dual-channel operational amplifier chip U7A is connected to the other end of the capacitor C21 and VCC_I-; the 2nd pin of the TPA1862-SR dual-channel operational amplifier chip U7A is connected to the resistor R21 and the other end of the capacitor C16, and is connected to the HCNR200 isolation optical coupler chip UA1. The 6th pin of the isolation optocoupler chip UA1 is connected, the 8th pin of the TPA1862-SR dual-channel operational amplifier chip U7A is connected to VCC_I and one end of the capacitor C17, and the other end of the capacitor C17 is grounded; the 4th pin of UA1 is connected to GND_S1, and the 3rd pin is connected to one end of the capacitor C18, the 6th pin of the TPA1862-SR dual-channel operational amplifier chip U6 and one end of the resistor R22, HCNR200 Pin 2 of the isolation optocoupler chip UA1 is connected to V_S1 and one end of the capacitor C15, and the other end of C15 is connected to GND_S1. Pin 1 of UA1 is connected to one end of the resistor R23, and the other end of the resistor R23 is connected to pin 2 of the transistor Q1. Pin 3 of Q1 is connected to GND_S1. Pin 1 is connected to one end of the capacitor C18 and pin 7 of the dual-channel operational amplifier chip U6. Pins 1 and 2 of the dual-channel operational amplifier chip U6 are connected to the other end of the resistor R22, and pins 4 and 5 of the dual-channel operational amplifier chip U6 are connected to GND_S1, and pin 8 is connected to V_S1. Pin 3 of the dual-channel operational amplifier chip U6 is connected to the 2 ends of the SMBJ5.0A electrostatic and surge protection diode D5, one end of the capacitor C19, and resistors R25 and R27. One end of the diode D5 is connected to the other end of the capacitor C19, one end of the resistor R33, GND_S1 and BCH-508HS-8GY. Pin 6 of the printed circuit board connector socket J1, the other end of the resistor R33 is connected to the other end of the resistor R25, resistors R27, R32, R24, R26, R31, and R28 are connected in series, the other end of the resistor R28 is connected to ends 2 of the FR107FR1M fast recovery diode D4, one end of the diode D4 is connected to ends 2 of the FR107FR1M fast recovery diode D3, and one end of the FR107FR1M fast recovery diode D3 is connected to pin 8 of the BCH-508HS- 8 GY printed circuit board connector socket J1.

[0006] The new energy vehicle charging pile analog signal acquisition circuit includes a new energy vehicle battery terminal voltage and charging current detection circuit 2. The other end of the capacitor C27 in the circuit is grounded, the other end of the resistor R42 is connected to the 3rd pin of the series switching diode U10 and one end of the resistor R41, the 2nd pin of the series switching diode U10 is connected to 3.3V_MCU, and the 1st pin is grounded. The other end of the resistor R41 is connected to the resistor R35, one end of the capacitor C25 and the 7th pin of the TPA1862-SR dual-channel operational amplifier chip U7B, the 5th pin of the TPA1862-SR dual-channel operational amplifier chip U7B is grounded and the 5th pin of the HCNR200 isolation optical coupler chip UA2, and the 6th pin of the TPA1862-SR dual-channel operational amplifier chip U7B is connected to the resistor R35 and the other end of the capacitor C25, and is connected to the HCNR200. Pin 6 of the isolated optocoupler chip UA2 is connected, pin 4 of UA2 is connected to GND_S2, pin 3 is connected to one end of capacitor C26, pin 6 of TPA1862-SR dual-channel operational amplifier chip U9 and one end of resistor R34, pin 2 of the HCNR200 isolated optocoupler chip UA2 is connected to V_S2 and one end of capacitor C22, the other end of C22 is connected to GND_S2, pin 1 of UA2 is connected to one end of resistor R39, the other end of resistor R39 is connected to pin 2 of transistor Q2, pin 3 of Q2 is connected to GND_S2, pin 1 is connected to one end of capacitor C26 and pin 7 of dual-channel operational amplifier chip U9, pins 1 and 2 of dual-channel operational amplifier chip U9 are connected to the other end of resistor R34, pins 4 and 5 of dual-channel operational amplifier chip U9 are connected to GND_S2, and pin 8 is connected to V_S2 and capacitor C23 One end of the capacitor C23 is connected to GND_S2; Pin 3 of the dual operational amplifier chip U9 is connected to the 2 ends of the SMBJ5.0A electrostatic and surge protection diode D6, capacitor C24, resistors R38, and one end of R40. One end of the diode D6 is connected to the other end of the capacitor C24, one end of the resistor R46, and GND_S2. The other end of the resistor R38 is connected to the other end of the resistor R46. Resistors R40, R45, R37, R36, R44, and R43 are connected in series. The other end of the resistor R43 is connected to the 2 ends of the FR107FR1M fast recovery diode D8. One end of the diode D8 is connected to the 2 ends of the FR107FR1M fast recovery diode D7. One end of the FR107FR1M fast recovery diode D7 is connected to the BCH-508HS- 8 GY printed circuit board connector socket J1. The other end of capacitor C38 is connected to pin 4; the other end of resistor R52 is connected to pin 3 of series switch diode U15 and one end of resistor R51; pin 1 of series switch diode U15 is connected to ground, and pin 2 is connected to pin 3.3V_MCU, the other end of resistor R51 is connected to resistor R47, one end of capacitor C34, and pin 1 of TPA1862-SR dual operational amplifier chip U14A, pin 8 of U14A is connected to VCC_I, one end of capacitor C35, and the other end of capacitor C35 is grounded, pin 4 is connected to one end of capacitor C40 and VCC_I-, and the other end of capacitor C40 is grounded, the other end of resistor R47 and capacitor C34 are connected to pin 2 of U14A and one end of resistor R53, and the other end of resistor R53 is connected to pin 6 of HCPL-7840 optical coupler isolation chip U12, pin 3 of U14A is connected to capacitor C39, resistor R54, and one end of resistor R49, and the other end of resistor R54 and capacitor C39 is grounded, and the other end of resistor R49 is connected to HCPL-7840 Pin 7 of the optocoupler isolation chip U12 and pin 8 of U12 are connected to one end of capacitors C28 and C29 and VCC_I, the other ends of capacitors C28 and C29 are grounded, pin 5 of U12 is grounded, pins 3 and 4 are connected to GND_S2, pin 3 of U13, one end of resistor R50, one end of capacitor C36, one end of capacitor C37, one end of fuse FU2, HCPL-7840. Pin 2 of the optocoupler isolation chip U12 is connected to pins 1 and 2 of U13, the other end of resistor R50, the other end of capacitor C36, and one end of resistor R48. The other end of resistor R48 is connected to the other end of capacitor C37 and pin 3 of U11, one end of fuse FU1, and the other ends of fuses FU1 and FU2 are connected to pins 1 and 2 of BCH-508HS- 8 GY printed circuit board connector socket J1 respectively; HCPL-7840 Pin 1 of the optocoupler isolation chip U12 is connected to capacitors C30, C33, C32, +5V_S2 and pin 3 of the 7805DPAK DC 12V to 5V linear voltage regulator chip U51. The other ends of capacitors C30, C33, and C32 are connected to pin 2 of U51 and GND_S2, one end of capacitor C31, and pin 1 of U11. Pin 1 of the 7805DPAK DC 12V to 5V linear voltage regulator chip U51 is connected to one end of capacitor C31, pin 2 of U11, and V_S2. .

[0007] The other end of the capacitor C44 in the charging gun temperature detection circuit 3 is grounded, the other end of the resistor R62 is connected to the 3rd pin of the series switching diode U18 and one end of the resistor R61, the 2nd pin of U18 is connected to 3.3V_MCU, and the 1st pin of U18 is grounded; the other end of the resistor R61 is connected to the 1st pin of the TPA1862-SR dual-channel operational amplifier chip U17A and one end of the resistor R55, the 8th pin of U17A is connected to 5V_MCU, one end of the capacitor C41, and the other end of the capacitor C41 The end is grounded, the 2nd pin is connected to the other end of the resistor R55 and one end of the resistor R59, the other end of the resistor R59 is connected to one end of the resistors R58 and R57, the other end of the resistor R58 is grounded, the other end of the resistor R57 is connected to the capacitor C43, +2.5V_A, the 2nd and 1st pins of the TL431BIDBZR voltage reference chip U16 and one end of the resistor R56, the other end of the resistor R56 is connected to 5V_MCU and one end of the capacitor C42, and the other end of the capacitor C42 is grounded; TL431BIDBZR Pin 3 of the voltage reference chip U16 is connected to the other end of the capacitor C43 and the ground; Pin 4 of the TPA1862-SR dual operational amplifier chip U17A is grounded, and pin 3 is connected to one end of resistors R64 and R63, the other end of resistor R64 is grounded, the other end of resistor R63 is connected to the 2 ends of the electrostatic and surge protection diode D9, one end of capacitor C45, one end of resistor R60 and 2ERJRC-3.81-6P; Pin 6 of the printed circuit board connector socket J7, the other end of resistor R60 is connected to 5V_MCU, the 1 end of the electrostatic and surge protection diode D9 is connected to GND, the other end of capacitor C45 and 2ERJRC-3.81-6P Pin 5 of the printed circuit board connector socket J7; the other end of capacitor C46 is grounded, the other end of resistor R70 is connected to pin 3 of the series switching diode U19 and one end of resistor 69, pin 2 of U19 is connected to 3.3V_MCU, pin 1 is grounded, the other end of resistor R69 is connected to one end of resistor R65 and pin 7 of TPA1862-SR dual operational amplifier chip U17B, pin 6 of U17B is connected to the other end of resistor R65 and one end of resistor R68, the other end of resistor R68 is connected to one end of resistors R67 and R66, the other end of resistor R67 is grounded, the other end of resistor R66 is connected to +2.5V_A, pin 5 of U17B is connected to one end of resistors R73 and R72, the other end of resistor R73 is grounded, and the other end of resistor R72 is connected to SMBJ5.0A The 2 ends of the electrostatic and surge protection diode D10, one end of the resistor R71, the 4th pin of the 2ERJRC-3.81-6P printed circuit board connector socket J7 and one end of the capacitor C47, the other end of the resistor R71 is connected to 5V_MCU, SMBJ5.0A. The 1 end of the electrostatic and surge protection diode D10 is connected to the other end of the capacitor C47 and the 3rd pin of the 2ERJRC-3.81-6P printed circuit board connector socket and grounded; the other end of the capacitor C49 is grounded, the other end of the resistor R78 is connected to the 3rd pin of the series switch diode U21 and one end of the resistor R80, and the 2nd pin of the series switch diode U21 is connected to 3.3V_MCU, pin 1 is grounded; the other end of resistor R80 is connected to one end of resistor R74 and pin 1 of dual operational amplifier chip U20A, pin 8 of U20A is connected to 5V_MCU and one end of capacitor C48, the other end of capacitor C48 is grounded, and pin 4 is grounded; pin 2 is connected to the other end of resistor R74 and one end of resistor R77, the other end of resistor R77 is connected to one end of resistors R76 and R75, the other end of resistor R76 is grounded, the other end of resistor R75 is connected to +2.5V_A, pin 3 of U20A is connected to one end of resistors R82 and R81, the other end of resistor R82 is grounded, the other end of resistor R81 is connected to pin 2 of SMBJ5.0A electrostatic and surge protection diode D11, one end of capacitor C50 and one end of resistor R79 are connected to pin 2 of 2ERJRC-3.81-6P printed circuit board connector socket J7, the other end of resistor R79 is connected to 5V_MCU, SMBJ5.0A The 1st pin of the electrostatic and surge protection diode D11, the other end of the capacitor C50 and the 1st pin of the 2ERJRC-3.81-6P printed circuit board connector socket J7 are grounded.

[0008] The other end of the capacitor C56 in the cc and cp detection circuit 4 is grounded, the other end of the resistor R85 is connected to the 3rd pin of the series switching diode U25 and one end of the resistor R86, the 2nd pin of the series switching diode U25 is connected to 3.3V_MCU, and the 1st pin is grounded; the other end of the resistor R86 is connected to the 1st and 2nd pins of the TPA1862-SR dual-channel operational amplifier chip U24A, and the 8th pin of U24A is connected to +12V, one end of the capacitor C54, one end of the capacitor C53 and 7812 DC 15V Connect the 3rd pin of the 12V linear voltage regulator chip U22, the other end of the capacitor C54 is grounded, the 3rd pin of U24A is connected to the capacitor C55, one end of the resistor R88, the 3rd pin of the series switching diode U23, one end of the resistor R87, the 1st pin of the series switching diode U23 is grounded, the 2nd pin is connected to one end of the resistors R84 and R83 and +12V, the other end of the resistor R87 is connected to the other end of the resistors R84 and R83 and 2ERJRC-3.81-3P Pin 1 of the printed circuit board connector socket J2 and pin 4 of U24A are grounded, the other end of capacitor C55 is connected to the other end of resistor R88 and grounded; the other end of capacitor C59 is grounded, the other end of resistor R93 is connected to pin 3 of the series switching diode U28 and one end of resistor R94, pin 2 of the series switching diode U28 is connected to 3.3V_MCU, pin 1 is grounded, the other end of resistor R94 is connected to pins 7 and 6 of PTA186Z-SR dual-channel operational amplifier chip U24B, pin 5 of U24B is connected to one end of resistor R95, the other end of resistor R95 is connected to capacitor C58, one end of resistor R96 and pins 1 and 2 of LM211DR comparator chip U26, the other ends of capacitor C58 and resistor R96 are grounded; LM211DR Pin 3 of comparator chip U26 is connected to one end of resistor R90, pin 4 is grounded, pin 7 is connected to one end of resistor R91, pin 8 is connected to the other end of resistor R91 +12V, capacitor C53, one end of capacitor C57 and pin 3 of 7812 chip U22, pin 1 of 7812 chip U22 is connected to capacitors C52, C51 and one end of inductor B2, the other end of inductor B2 is connected to +15V, pin 2 of 7812 U22 is connected to the other end of capacitors C53, C52, C51 and ground; the other end of capacitor C57 is grounded, the other end of resistor R90 is connected to pin 3 of series switching diode U27, pin 2 is connected to +12V, pin 1 is grounded, the other end of resistor R90 is also connected to one end of resistors R92 and R89, the other end of resistor R92 is grounded, the other end of resistor R89 ​​is connected to end 2 of diode D12, and end 1 of diode D12 is connected to 2ERJRC-3.81-3P Pin 2 of the printed circuit board connector socket J2, 2ERJRC-3.81-3P Pin 3 of the printed circuit board connector socket J2 is grounded.

[0009] Pin 1 of the ADUM1201 digital isolation optocoupler chip U31 in the CAN communication circuit 5 is connected to one end of the capacitor C63 and 3.3V_MCU, the other end of the capacitor C63 is grounded, pin 2 of U31 is connected to mcu_can_rx, pin 3 is connected to mcu_can_tx and one end of the resistor R99, the other end of the resistor R99 is connected to 3.3V_MCU, pin 4 of U31 is grounded, pin 5 is connected to CND_C and pin 2 of the PCA82C250 CAN communication protocol chip U30, pin 6 is connected to pin 1 of the PCA82C250 CAN communication protocol chip U30, pin 7 is connected to pin 4 of U30, pin 8 is connected to +5V_C, one end of the capacitor C62, C61, one end of the capacitor C60, one end of the diode D13, pin 3 of the MC7805DPAK DC 12V to 5V linear regulated power supply chip U29, PCA82C250 CAN Pin 3 of the communication protocol chip U30 and the other end of capacitors C61 and C62 are connected to GND_C. Pin 1 of the MC7805DPAK DC 12V to 5V linear voltage regulator chip U29 is connected to the 2 ends of the diode D13 and V_CAN, and the 2nd end of U29 is connected to the other end of capacitor C60 and GND_C. Pin 7 of the PCA82C250 CAN communication protocol chip U30 is connected to one end of resistor R98, the 2nd end of P0080TA semiconductor discharge tube D14 and one end of FSMD050-1206-R self-recovery fuse FU3. Pin 6 of the PCA82C250 CAN communication protocol chip U30 is connected to one end of resistor R97, P0080TA The 2 ends of the semiconductor discharge tube D15 and one end of the resettable fuse FU4, the 5th pin of U30 is connected to the other end of the resistors R97 and R98 and one end of the capacitor C64, the other end of C64 is connected to CND_C, the 8th pin is connected to one end of the resistor R100, the other end of R100 is connected to GND_C, the 1st end of the semiconductor discharge tube D14 and D15 of P0080TA is connected to GND_C; the other end of the resettable fuse FU3 is connected to the 2nd pin of the KF1002-02P-R3FLG-ON-02B dip switch SW2 in the RS485 communication circuit 8 and the 3rd pin of the 2ERJRC-3.81-3P printed circuit board connector socket J3, the other end of the resettable fuse FU4 is connected to one end of the resistor R101, 2ERJRC-3.81-3P Pin 2 of the printed circuit board connector socket J3, the other end of the resistor R101 is connected to pin 3 of the KF1002-02P-R3FLG-ON_02B dip switch SW2, and pin 1 of the 2ERJRC-3.81-3P printed circuit board connector socket J3 is connected to GND_C.

[0010] The other end of the capacitor C99 in the insulation detection circuit 7 is connected to GND, the other end of the resistor R140 is connected to one end of the resistor R139 and the 3rd pin of the series switching diode U43, the 2nd pin of U43 is connected to 3.3V_MCU, and the 1st pin of U43 is grounded; the other end of the resistor R139 is connected to the 1st and 2nd pins of the TPA1862-SR dual-channel operational amplifier chip U41A, the 8th pin of U41A is connected to VCC_I, one end of the capacitor C94 and the 3rd pin of the MC7805BDTRKG DC 12V to 5V linear regulated power supply chip U39, the 1st pin of the DC 12V to 5V linear regulated power supply chip U39 is connected to the capacitor C95, one end of the capacitor C96 and one end of the inductor B4, the DC 12V to 5V Pin 2 of the linear voltage regulator power supply chip U39 is connected to the other end of capacitors C94, C95, and C96 and grounded; the other end of the inductor B4 is connected to +15V, the 1 end of the 2CZ4007-SOD123 diode D29, the 2 end of the 2CZ4007-SOD123 diode D29 is connected to one end of the self-recovery fuse FU8, and the other end of the self-recovery fuse FU8 is connected to VCC_R; Pin 4 of the TPA1862-SR dual-channel operational amplifier chip U41A is connected to VCC_I-, one end of the capacitors C73 and C70, the 3rd pin of the MC79M05BDTGL DC negative 12V to negative 5V linear voltage regulator power supply chip U45, the 4th pin of the TPA1862-SR dual-channel operational amplifier chip U46, and the MC79M05BDTGL DC negative 12V to negative 5V Pin 2 of the linear voltage regulator power supply chip U45 is connected to capacitors C75, C76, and one end of the inductor B5, and the other end of the inductor B5 is connected to VCC-. Pin 1 of the MC79M05BDTGL DC negative 12V to negative 5V linear voltage regulator power supply chip U45 is connected to the other ends of capacitors C73, C70, C75, C76 and ground;Pin 3 of the TPA1862-SR dual operational amplifier chip U46 is connected to resistor R147, capacitor C78, ​​and one end of resistor R161. The other ends of capacitor C78 and resistor R161 are connected to capacitor C84, one end of resistor R162, and pin 4 of the ALPP112W power relay U48. Pin 3 of U48 is connected to resistor R162, the other end of capacitor C84, and ground. Pin 1 of U48 is connected to VCC_R and the 2nd end of diode D35. Pin 2 of U48 is connected to the 1st end of diode D35 and the collector of transistor Q9. The base of transistor Q9 is connected to one end of resistors R167 and R169. The emitter of transistor Q9 is connected to the other end of resistor R169 and ground. The other end of resistor R167 is connected to mcu_isu1_k5. The other end of resistor R147 is connected in series with resistors R153, R152, R151, R150 and R149. The other end of resistor R149 is connected to pin 3 of ALDP112W power relay U47 and one end of resistor R155. The other end of resistor R155 is connected in series with resistors R156, R157, R158, R159 and R160. The other end of R160 is connected to ALDP112W The 4-pin connection of power relay U49, the 1-pin of U49 is connected to VCC_R and one end of diode D34, the 2-pin is connected to the other end of diode D34 and the collector of transistor Q8, the 3-pin of ALDP112W power relay U49 is connected to GDN, the base of transistor Q8 is connected to resistors R168 and one end of R170, the other end of R168 is connected to mcu_isu1_k3, the emitter of transistor Q8 is connected to the other end of resistor R170 and ground; the 2-pin of ALDP112W power relay U47 is connected to VCC_R and the 2-end of diode D33, Pin 1 of U47 is connected to end 1 of diode D33 and collector of transistor Q7, base 1 of transistor Q7 is connected to one end of resistors R166 and R165, the other end of resistor R165 is connected to mcu_isu1_k1, emitter of transistor Q7 is connected to the other end of resistor R166 and ground; pin 4 of U47 is connected to pin 1 of BCH-508HS-5GY printed circuit board connector socket J6, pin 5 of J6 is grounded, pin 3 is connected to pin 4 of ALDP112W power line appliance U40, pin 1 of U40 is connected to end 1 of diode D30 and collector 3 of transistor Q4, pin 2 of U40 is connected to the other end of diode D30 and VCC_R; base 1 of transistor Q4 is connected to one end of resistors R141 and R145, the other end of resistor R141 is connected to mcu_isu1_k0, emitter 2 of transistor Q4 is connected to the other end of resistor R145 and ground;The base 1 of transistor Q5 is connected to one end of resistors R144 and R142, the other end of resistor R142 is connected to mcu_isu1_k2, the emitter 2 of transistor Q5 is connected to the other end of resistor R144 and ground, the collector 3 of transistor Q5 is connected to one end of diode D31 and pin 2 of ALP112W power relay U44, pin 3 of ALDP112W power relay U44 is grounded, and the 4th pin is connected in series with resistors R131, R136, and R135 , R134, R133, R132, the other end of resistor R132 is connected to pin 3 of ALDP112W power relay U40 and one end of resistor R125, the other end of resistor R125 is connected in series with resistors R126, R127, R128, R129, R130, the other end of resistor R130 is connected to capacitor C97, one end of resistor R137, pin 3 of TPA1862-SR dual-channel operational amplifier chip U41A, capacitor C97 , the other end of resistor R137 is connected to capacitor C98, one end of resistor R138 and pin 4 of ALPP112W power relay U42, pin 3 of ALPP112W power relay U42 is connected to resistor R138, the other end of capacitor C98 and GND; pin 1 of ALDP112W power relay U44 is connected to the other end of diode D31, VCC_R, pin 1 of ALDP112W power relay U42 and one end of diode D32; the other end of diode D32 is connected to pin 2 of ALDP112W power relay U42 and collector 3 of transistor Q6, base 1 of transistor Q6 is connected to one end of resistors R146 and R143, the other end of resistor R143 is connected to mcu_isu1_k4, emitter of transistor Q6 is connected to resistor 2, the other end of R146 and CND; TPA1862-SR dual-channel operational amplifier Pins 1 and 2 of the amplifier chip U46 are connected to one end of the resistor R154, and the other end of the resistor R154 is connected to the resistor R148 and the 6th pin of U46. The 7th pin of the TPA1862-SR dual-channel operational amplifier chip U46 is connected to the other end of the resistor R148 and the 5th pin of the TPA1862-SR dual-channel operational amplifier chip U41B. The 8th pin of the TPA1862-SR dual-channel operational amplifier chip U46 is connected to VCCI, and the 5th pin is grounded; Pins 6 and 7 of the TPA1862-SR dual-channel operational amplifier chip U14B are connected to one end of the resistor R163, and the other end of R163 is connected to one end of the resistor R164 and the 3rd pin of the series switching diode U50. The 2nd pin of U50 is connected to 3.3V_MCU, and the 1st pin is grounded; the other end of the resistor R164 is connected to one end of the capacitor C86 and mcu_adc_1#isu-, and the other end of the capacitor C86 is grounded. ;

[0011] The 1st pin of the ADUM1201 digital isolation optocoupler chip U33 in the RS485 communication circuit is connected to one end of the capacitor C67 and 3.3V_MCU, the other end of the capacitor C67 is grounded, the 4th pin of U33 is grounded, the 5th pin of the ADUM1201 digital isolation optocoupler chip U33 is connected to CND_C and the 5th pin of the SN65176BDR RS485 communication protocol chip U32, the 6th pin of U33 is connected to the 4th pin of U32, the 7th pin of U33 is connected to the 1st pin of U32, the 8th pin of U33 is connected to the 4th pin of +5V_C, the 8th pin of U32 and the 4th pin of the HMHA281 isolation optocoupler chip U34, +5V_C and one end of the capacitors C66 and C65, the other end of C66 and C65 is connected to GND_C, and the HMHA281 Pin 1 of the isolation optocoupler chip U34 is connected to one end of resistor R105, the other end of resistor R105 is connected to one end of resistor R106 and mcu_uart1_dr, the other end of resistor R106 is grounded, pin 2 of U34 is grounded, pin 3 of U34 is connected to one end of resistor R107 and pins 2 and 3 of the SN65176BDR RS485 communication protocol chip U32, the other end of resistor R107 is connected to CND_C, pin 7 of the SN65176BDR RS485 communication protocol chip U32 is connected to one end of resistor R104, one end of diode D17 and one end of FSMD050-1206-R resettable fuse FU6, SN65176BDR RS485 Pin 6 of the communication protocol chip U32 is connected to one end of the resistor R103, one end of the diode D16 and one end of the FSMD050-1206-R resettable fuse FU5, the other ends of the diodes D16 and D17 are connected to CND_C, the other end of the resistor R104 is connected to CND_C, the other end of the resistor R103 is connected to +5V_C, the other end of the FSMD050-1206-R resettable fuse FU5 is connected to end 1 of the KF1002-02P-R3FLG-ON-02B DIP switch SW2 and pin 3 of the 2ERJRC-3.81-3P printed circuit board connector socket J4, the other end of the FSMD050-1206-R resettable fuse FU6 is connected to one end of the resistor R102 and pin 2 of the 2ERJRC-3.81-3P printed circuit board connector socket J4, the other end of the resistor R102 is connected to KF1002-02P-R3FLG-ON-02B Pin 4 of the DIP switch SW2 and pin 1 of the 2ERJRC-3.81-3P printed circuit board connector socket J4 are connected to CND_C.

[0012] Beneficial effects of the utility model:

[0013] 1. The multi-channel analog signals in the charging process of the charging pile are collected, reported and transmitted in a centralized manner.

[0014] 2. Analog signals are easily interfered with, and digital signals and analog models can be completely isolated to protect analog signals from interference to the greatest extent.

[0015] 3. Realize the separation of strong current and weak current, ensuring the personal safety of producers, debuggers, users and after-sales maintainers.

[0016] 4. After-sales personnel can quickly locate the problem point and replace it quickly, making maintenance more convenient and quicker.

[0017] 5. Communicate with the outside world through CAN or RS485 communication interface to improve anti-interference ability.

[0018] 6. The hardware design strictly complies with the requirements of electrical clearance and safe creepage distance.

[0019] 7. Realize modular design, modular production, modular debugging, and modular after-sales maintenance.

[0020] 8. Make the design faster and more efficient, reduce time costs, and speed up product development. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following is a detailed description of the embodiments with reference to the accompanying drawings.

[0022] Figure 1 It is a circuit schematic diagram of a voltage detection circuit at the output end of a charging module in an analog signal acquisition circuit 9 of a new energy vehicle charging pile;

[0023] Figure 2 yes Figure 1 The circuit schematic diagram of the battery terminal voltage and charging current detection circuit in FIG.

[0024] Figure 3 yes Figure 1 The circuit schematic diagram of the charging pile temperature detection circuit in FIG.

[0025] Figure 4 yes Figure 1 The circuit schematic diagram of the cc and cp detection circuits in;

[0026] Figure 5 yes Figure 1 The circuit schematic diagram of the CAN communication circuit in;

[0027] Figure 6 yes Figure 1 The circuit diagram of the power supply circuit in FIG.

[0028] Figure 7 yes Figure 1 The circuit schematic diagram of the RS485 communication circuit in;

[0029] In the figure: 1-charging module output voltage detection circuit; 2-new energy vehicle battery terminal voltage, charging current detection circuit; 3-charging gun temperature detection circuit; 4-CC, CP detection circuit; 5-CAN communication circuit; 6-power supply circuit; 7-insulation detection circuit; 8-RS485 communication circuit; 9-new energy vehicle charging pile analog quantity acquisition circuit; U1-STM32F103C8T6 single chip microcomputer; U2-ADS1118IDGSR 16-bit analog-to-digital conversion chip; U3-24LC256T-ISN EEPROM chip; U4-7805TO-220 DC 15V to 5V linear voltage regulator chip; U5-DC 5V to 3.3V linear voltage regulator chip; U6, U7A, U7B, U9, U14A, U17A, U17B, U20A, U24A, U24B U41A, U41B, U46-dual operational amplifier chip; U8, U10, U11, U13, U15, U18, U19, U21, U23, U25, U27, U28, U43, U50-series switching diode; U26-LM211DR comparator chip, U12-HCPL-7840 optical coupler isolation chip; U16, U38-TL431BIDBZR voltage reference chip; U22-7812 DC 15V to 12V linear voltage regulator chip; U26-LM211DR comparator chip; U29, U39, U51-7805DPAK DC 12V to 5V linear voltage regulator chip; U30-PCA82C250 CAN communication protocol chip; U31, U33-ADUM1201 Digital isolation optocoupler chip; U32-SN65176BDRRS485 communication protocol chip; U34-HMHA281 isolation optocoupler chip; U35-MC7815CDTRKG DC 24V to 15V linear regulated power supply chip; U36-UC3845BVD1R2G high-performance current mode PWM control chip; U37-LTV-816TSLITE thyristor signal output optocoupler chip; U45-MC79M05BDTGL DC negative 12V to negative 5V linear regulated power supply chip; UA1, UA2-HCNR200 isolation optocoupler chip; U40, U42, U44, U47, U48, U49-ALDP112W power relay; C1┈C99 capacitor; C100┈C106 Electrolytic capacitor; R1┈R170 resistor; D1, D2 light emitting diodes; D3, D4, D7, D8-FR107FR1M fast recovery diodes; D5, D6, D9, D10, D11-SMBJ5.0A electrostatic and surge protection diode; D12, D13, D29, D30, D31, D32, D33, D34, D35-2CZ4007 diode; D14, D15, D16, D17-P0080TA semiconductor discharge tube; D18, D23, D26, D28-MURA120T3 fast recovery diode; D19, D24-SMF10A electrostatic and surge protection diode; D20-IN4007 diode; D21, D25-B340B Schottky diode; D22-P6SMB27A electrostatic and surge protection diode; D27-SMF15A electrostatic and surge protection diode; transformer H; FU1, FU2, FU7-JK60-090 fuse, FU3, FU4, FU5, FU6, FU8-FSMD050-1206-R resettable fuse; B1, B2, B3, B4, B5-MLF2012A1R5KT000 inductor; L1-SLF7045T-150M power inductor; Q1, Q2-MMBT4403 PNP transistor; Q3-IRF540NSTRLPBF N-channel field effect transistor; Q4, Q5, Q6, Q7, Q8, Q9-MMBT4401LT1G PNP transistor; Y1-SMD-8MHZ 3225-4P chip passive crystal oscillator; H1-EFD25-CYB-T1-1 power transformer SW1- KF1002-04P-R3GLG-DFT-02B Dip switch; SW2-KF1002-02P-R3FLG-ON-02B Dip switch; J1 -BCH-508HS- 8 GY printed circuit board connector socket; J2, J3, J4-2ERJRC-3.81-3P printed circuit board connector socket; J7-2ERJRC-3.81-6P printed circuit board connector socket; J5 -BCH-508HS- 2 GY printed circuit board connector socket; J6-BCH-508HS- 5 GY printed circuit board connector socket. . DETAILED DESCRIPTION

[0030] Embodiment, referring to the accompanying drawings, a new energy vehicle charging pile analog signal acquisition circuit includes a power supply circuit 6, which is characterized in that a new energy vehicle charging pile analog signal acquisition circuit 9 is set in the system; the new energy vehicle charging pile analog signal acquisition circuit 9 is composed of an STM32F103C8T6 single-chip microcomputer U1, pin 1 of the single-chip microcomputer U1 is connected to 3.3V_MCU, pin 3 is connected to the 2 ends of the light-emitting diode D1, the 1 end of the light-emitting diode D1 is connected to one end of the resistor R18, and the other end of the resistor R18 is connected to 3.3V_MCU, the 7th pin of the STM32F103C8T6 single-chip microcomputer U1 is connected to the capacitor C5 and one end of the resistor R13, the other end of the capacitor C5 is grounded, the other end of the resistor R13 is connected to 3.3V_MCU, the 20th pin is connected to one end of the resistor R11, and the resistor R The other end of 11 is connected to one end of resistor R12, 44 pin is connected to one end of resistor R9, the other end of resistor R9 is connected to one end of resistor R10, the other ends of resistors R10 and R12 are grounded, 5 pin is connected to pin 1 of SMD-8MHZ3225-4P passive crystal oscillator Y1 and one end of capacitor C3, 6 pin is connected to pin 3 of SMD-8MHZ3225-4P passive crystal oscillator Y1 and one end of capacitor C4, the other ends of capacitors C3 and C4 are connected to pin 4 and pin 2 of SMD-8MHZ3225-4P passive crystal oscillator Y1 and grounded, 32 and 33 pins are connected to pin 2 and pin 3 of SWD1 socket respectively, pin 1 of SWD1 socket is connected to 3.3V_MCU, pin 4 is grounded, 42 pin is connected to one end of resistor R7 and 24LC256T-ISN Pin 6 and 43 of EEPROM chip U3 are connected to one end of resistor R8 and pin 5 of 24LC256T-ISNEEPROM chip U3. The other end of resistors R7 and R8 are connected to one end of capacitor C2, 3.3V_MCU and pin 8 of 24LC256T-ISNEEPROM chip U3. The other end of capacitor C2 is connected to pin 7 of U3 and ground. Pins 1, 2, 3, and 4 of chip U3 are grounded, pin 21 of U1 is connected to one end of resistor R14 and pin 5 of KF1002-04P-R3GLG-DFT-02B DIP switch SW1, pin 2 is connected to one end of resistor R17 and pin 6 of KF1002-04P-R3GLG-DFT-02B DIP switch SW1, pin 45 is connected to one end of resistor R16 and pin 7 of KF1002-04P-R3GLG-DFT-02B DIP switch SW1, pin 46 is connected to one end of resistor R15 and pin 8 of KF1002-04P-R3GLG-DFT-02B DIP switch SW1, and the other ends of resistors R14, R15, R16, and R17 are all connected to 3.3V_MCU, SW1- KF1002-04P-R3GLG-DFT-02B The 1, 2, 3, and 4 pins of the DIP switch SW1 are all grounded; The 12th pin of the STM32F103C8T6 single-chip computer U1 is connected to the resistor R30 and one end of the capacitor C20 in the voltage detection circuit (1) of the charging module output end; The 11th and 10th pins of the single-chip computer U1 are respectively connected to the resistor R42, one end of the capacitor C27 and one end of the resistor R52, one end of the capacitor C38 in the battery voltage detection circuit and the charging current detection circuit (2) of the new energy vehicle charging pile; The 15th pin of the STM32F103C8T6 single-chip computer U1 is connected to the resistor R78 and one end of the capacitor C49 in the charging gun temperature detection circuit (3), the 19th pin is connected to the resistor R70 and one end of the capacitor C46, ​​and the 18th pin is connected to the resistor R62 and one end of the capacitor C44; STM32F103C8T6 Pin 13 of the single-chip microcomputer U1 is connected to one end of the resistor R85 and capacitor C56 in the cc and cp detection circuit (4), and pin 14 is connected to one end of the resistor R93 and capacitor C59; Pins 34 and 37 of the STM32F103C8T6 single-chip microcomputer U1 are connected to pins 2 and 3 of the ADUM1201 digital isolation optocoupler chip U31 in the CAN communication circuit (5); Pins 25, 26, 27, 28, 29 and 4 of the STM32F103C8T6 single-chip microcomputer U1 are connected to mcu_isu1_k4, mcu_isu1_k5, mcu_isu1_k0, mcu_isu1_k1, mcu_isu1_k3 and mcu_isu1_k2, 17, 16 in the charging pile insulation detection circuit (7) respectively. Pins 38, 39, 41 and 40 are connected to one end of resistors R6, R5, R4, R3, R2 and R1 respectively; the other end of resistor R6 is connected to pin 5 of ADS1118IDGSR 16-bit analog-to-digital conversion chip U2 and mcu_adc_1#isu+ in insulation detection circuit 7, the other end of resistor R5 is connected to pin 4 of ADS1118IDGSR 16-bit analog-to-digital conversion chip U2 and mcu_adc_1#isu- in insulation detection circuit 7, the other end of resistors R4, R3, R2 and R1 are connected to pins 2, 1, 10 and 9 of ADS1118IDGSR 16-bit analog-to-digital conversion chip U2 respectively; pin 8 of ADS1118IDGSR 16-bit analog-to-digital conversion chip U2 is connected to one end of capacitor C1 and 3.3V_MCU, the other end of capacitor C1 is grounded; pin 3 of ADS1118IDGSR 16-bit analog-to-digital conversion chip U2 is grounded; pins 31, 30, and 22 of STM32F103C8T6 microcontroller U1 are connected to mcu_uart1_rx, mcu_uart1_tx, and mcu_uart1_dr respectively; pins 8, 23, 35, and 47 of STM32F103C8T6 microcontroller U1 are grounded, and pins 9, 24, 36, and 48 of U1 are connected to one end of capacitors C6, C7, C8, C9, and C12, one end of resistors R19 and R20, and DC 5V to DC 3.3V linear regulator chip LM1117-3.3-SO223 Pin 2 and 4 of U5 are connected to 3.3V_MCU; the other end of capacitors C6, C7, C8, and C9 are grounded; the other end of resistor R19 is connected to the 1 end of SMD LED D2; DC 5V to DC 3.3V linear voltage regulator chip LM1117-3.3-SO223 Pin 3 of U5 is connected to the 3 end of DC 15V to DC 5V linear voltage regulator chip 7805 Pin 3 of U4, one end of capacitors C10 and C11 and 5V_MCU; DC 15V to DC 5V linear voltage regulator chip 7805 Pin 1 of U4 is connected to one end of capacitors C13 and C14 and one end of inductor B1, and the other end of inductor B1 is connected to +15V; DC 5V to DC 3.3V linear voltage regulator chip LM1117-3.3-SO223 Pin 1 of U5 is connected to the 2nd end of the chip light emitting diode D2, the other end of the resistor R20, the other end of the capacitors C12, C11, C10, C13, C14, the 2nd end of the DC 15V to DC 5V linear voltage regulator chip 7805 U4 and grounded.

[0031] The analog signal acquisition circuit of a new energy vehicle charging pile is characterized by comprising a voltage detection circuit (1) at the output end of a charging module of a new energy vehicle charging pile, wherein the other end of a capacitor C20 in the circuit is grounded, the other end of a resistor R30 is connected to the 3rd pin of a series switch diode U8 and one end of a resistor R29, the 2nd pin of the series switch diode U8 is connected to 3.3V_MCU, the 1st pin is grounded, the other end of the resistor R29 is connected to the resistor R21, one end of a capacitor C16 and the 1st pin of a TPA1862-SR dual-channel operational amplifier chip U7A, the 3rd pin of the TPA1862-SR dual-channel operational amplifier chip U7A is grounded and the 5th pin of an HCNR200 isolation optocoupler chip UA1 and one end of a capacitor C21, the 4th pin of the TPA1862-SR dual-channel operational amplifier chip U7A is connected to the other end of the capacitor C21 and VCC_I-; the 2nd pin of the TPA1862-SR dual-channel operational amplifier chip U7A is connected to the resistor R21 and the other end of the capacitor C16, and is connected to the HCNR200 isolation optocoupler chip UA1. Pin 6 of the isolated optocoupler chip UA1 is connected, and pin 8 of the TPA1862-SR dual-channel operational amplifier chip U7A is connected to VCC_I and one end of capacitor C17, and the other end of capacitor C17 is grounded; Pin 4 of UA1 is connected to GND_S1, and pin 3 is connected to one end of capacitor C18, pin 6 of the TPA1862-SR dual-channel operational amplifier chip U6 and one end of resistor R22, and pin 2 of the HCNR200 isolated optocoupler chip UA1 is connected to V_S1 and one end of capacitor C15, and the other end of C15 is connected to GND_S1, Pin 1 of UA1 is connected to one end of resistor R23, the other end of resistor R23 is connected to pin 2 of transistor Q1, pin 3 of Q1 is connected to GND_S1, pin 1 is connected to one end of capacitor C18 and pin 7 of dual-channel operational amplifier chip U6, pins 1 and 2 of dual-channel operational amplifier chip U6 are connected to the other end of resistor R22, pins 4 and 5 of dual-channel operational amplifier chip U6 are connected to GND_S1, and pin 8 is connected to V_S1; pin 3 of dual-channel operational amplifier chip U6 is connected to two ends of SMBJ5.0A electrostatic and surge protection diode D5, capacitor C19, one end of resistors R25 and R27, one end of diode D5 is connected to the other end of capacitor C19, one end of resistor R33, GND_S1 and BCH-508HS- 8 GY printed circuit board connector socket J1 The other end of resistor R33 is connected to the other end of resistor R25, resistors R27, R32, R24, R26, R31, and R28 are connected in series, the other end of resistor R28 is connected to two ends of FR107FR1M fast recovery diode D4, one end of diode D4 is connected to two ends of FR107FR1M fast recovery diode D3, and one end of FR107FR1M fast recovery diode D3 is connected to pin 8 of BCH-508HS-8 GY printed circuit board connector socket J1.

[0032] The analog signal acquisition circuit of a new energy vehicle charging pile is characterized by comprising a new energy vehicle battery terminal voltage detection circuit and a charging current detection circuit (2), wherein the other end of the capacitor C27 in the circuit is grounded, the other end of the resistor R42 is connected to the 3rd pin of the series switch diode U10 and one end of the resistor R41, the 2nd pin of the series switch diode U10 is connected to the 3.3V_MCU, and the 1st pin is grounded, the other end of the resistor R41 is connected to the resistor R35, one end of the capacitor C25 and the 7th pin of the TPA1862-SR dual-channel operational amplifier chip U7B, the 5th pin of the TPA1862-SR dual-channel operational amplifier chip U7B is grounded and the 5th pin of the HCNR200 isolation optical coupler chip UA2, the 6th pin of the TPA1862-SR dual-channel operational amplifier chip U7B is connected to the resistor R35 and the other end of the capacitor C25, and is connected to the 6th pin of the HCNR200 isolation optical coupler chip UA2, Pin 4 of UA2 is connected to GND_S2, pin 3 is connected to one end of capacitor C26, pin 6 of TPA1862-SR dual-channel operational amplifier chip U9 and one end of resistor R34, pin 2 of HCNR200 isolation optocoupler chip UA2 is connected to V_S2 and one end of capacitor C22, the other end of C22 is connected to GND_S2, pin 1 of UA2 is connected to one end of resistor R39, the other end of resistor R39 is connected to pin 2 of transistor Q2, pin 3 of Q2 is connected to GND_S2, pin 1 is connected to one end of capacitor C26 and pin 7 of dual-channel operational amplifier chip U9, pins 1 and 2 of dual-channel operational amplifier chip U9 are connected to the other end of resistor R34, pins 4 and 5 of dual-channel operational amplifier chip U9 are connected to GND_S2, pin 8 is connected to V_S2 and one end of capacitor C23, the other end of capacitor C23 is connected to GND_S2; pin 3 of dual-channel operational amplifier chip U9 is connected to SMBJ5.0A The two ends of the electrostatic and surge protection diode D6, the capacitor C24, the resistor R38, and one end of R40, the one end of the diode D6 is connected to the other end of the capacitor C24 and one end of the resistor R46 and GND_S2, the other end of the resistor R38 is connected to the other end of the resistor R46, the resistors R40, R45, R37, R36, R44, and R43 are connected in series, the other end of the resistor R43 is connected to the two ends of the FR107FR1M fast recovery diode D8, the one end of the diode D8 is connected to the two ends of the FR107FR1M fast recovery diode D7, the one end of the FR107FR1M fast recovery diode D7 is connected to the 4th pin of the BCH-508HS-8GY printed circuit board connector socket J1; the other end of the capacitor C38 is grounded, the other end of the resistor R52 is connected to the 3rd pin of the series switch diode U15, and one end of the resistor R51, the 1st pin of the series switch diode U15 is grounded, and the 2nd pin is connected to 3.3V_MCU, the other end of resistor R51 is connected to resistor R47, one end of capacitor C34, and pin 1 of TPA1862-SR dual operational amplifier chip U14A, pin 8 of U14A is connected to VCC_I, one end of capacitor C35, and the other end of capacitor C35 is grounded, pin 4 is connected to one end of capacitor C40 and VCC_I-, and the other end of capacitor C40 is grounded, the other end of resistor R47 and capacitor C34 are connected to pin 2 of U14A and one end of resistor R53, and the other end of resistor R53 is connected to pin 6 of HCPL-7840 optical coupler isolation chip U12, pin 3 of U14A is connected to capacitor C39, resistor R54, and one end of resistor R49, and the other end of resistor R54 and capacitor C39 is grounded, and the other end of resistor R49 is connected to HCPL-7840 Pin 7 of the optocoupler isolation chip U12 and pin 8 of U12 are connected to one end of capacitors C28 and C29 and VCC_I, the other ends of capacitors C28 and C29 are grounded, pin 5 of U12 is grounded, pins 3 and 4 are connected to GND_S2, pin 3 of U13, one end of resistor R50, one end of capacitor C36, one end of capacitor C37, one end of fuse FU2, HCPL-7840. Pin 2 of the optocoupler isolation chip U12 is connected to pins 1 and 2 of U13, the other end of resistor R50, the other end of capacitor C36, and one end of resistor R48. The other end of resistor R48 is connected to the other end of capacitor C37 and pin 3 of U11, one end of fuse FU1, and the other ends of fuses FU1 and FU2 are connected to pins 1 and 2 of BCH-508HS- 8 GY printed circuit board connector socket J1 respectively; HCPL-7840 Pin 1 of the optocoupler isolation chip U12 is connected to capacitors C30, C33, C32, +5V_S2 and pin 3 of the 7805DPAK DC 12V to 5V linear voltage regulator chip U51. The other ends of capacitors C30, C33, and C32 are connected to pin 2 of U51 and GND_S2, one end of capacitor C31, and pin 1 of U11. Pin 1 of the 7805DPAK DC 12V to 5V linear voltage regulator chip U51 is connected to one end of capacitor C31, pin 2 of U11, and V_S2. .

[0033] The analog signal acquisition circuit of a new energy vehicle charging pile is characterized in that the other end of the capacitor C44 in the charging gun temperature detection circuit (3) is grounded, the other end of the resistor R62 is connected to the 3rd pin of the series switching diode U18 and one end of the resistor R61, the 2nd pin of U18 is connected to 3.3V_MCU, and the 1st pin of U18 is grounded; the other end of the resistor R61 is connected to the 1st pin of the TPA1862-SR dual-channel operational amplifier chip U17A and one end of the resistor R55, the 8th pin of U17A is connected to 5V_MCU, and the capacitor One end of C41, the other end of capacitor C41 is grounded, 2 pin is connected to the other end of resistor R55 and one end of resistor R59, the other end of resistor R59 is connected to one end of resistors R58 and R57, the other end of resistor R58 is grounded, the other end of resistor R57 is connected to capacitor C43, +2.5V_A, 2 and 1 pins of TL431BIDBZR voltage reference chip U16 and one end of resistor R56, the other end of resistor R56 is connected to 5V_MCU and one end of capacitor C42, and the other end of capacitor C42 is grounded; TL431BIDBZR Pin 3 of the voltage reference chip U16 is connected to the other end of the capacitor C43 and the ground; Pin 4 of the TPA1862-SR dual operational amplifier chip U17A is grounded, and pin 3 is connected to one end of resistors R64 and R63, the other end of resistor R64 is grounded, the other end of resistor R63 is connected to the 2 ends of the electrostatic and surge protection diode D9, one end of capacitor C45, one end of resistor R60 and 2ERJRC-3.81-6P; Pin 6 of the printed circuit board connector socket J7, the other end of resistor R60 is connected to 5V_MCU, the 1 end of the electrostatic and surge protection diode D9 is connected to GND, the other end of capacitor C45 and 2ERJRC-3.81-6P Pin 5 of the printed circuit board connector socket J7; the other end of capacitor C46 is grounded, the other end of resistor R70 is connected to pin 3 of the series switching diode U19 and one end of resistor 69, pin 2 of U19 is connected to 3.3V_MCU, pin 1 is grounded, the other end of resistor R69 is connected to one end of resistor R65 and pin 7 of TPA1862-SR dual operational amplifier chip U17B, pin 6 of U17B is connected to the other end of resistor R65 and one end of resistor R68, the other end of resistor R68 is connected to one end of resistors R67 and R66, the other end of resistor R67 is grounded, the other end of resistor R66 is connected to +2.5V_A, pin 5 of U17B is connected to one end of resistors R73 and R72, the other end of resistor R73 is grounded, the other end of resistor R72 is connected to two ends of SMBJ5.0A electrostatic and surge protection diode D10, one end of resistor R71 and 2ERJRC-3.81-6P Pin 4 of the PCB connector socket J7 and one end of the capacitor C47, the other end of the resistor R71 is connected to 5V_MCU, the 1 end of the SMBJ5.0A electrostatic and surge protection diode D10 is connected to the other end of the capacitor C47 and 2ERJRC-3.Pin 3 of the 81-6P printed circuit board connector socket is connected and grounded; the other end of capacitor C49 is grounded, the other end of resistor R78 is connected to pin 3 of the series switching diode U21 and one end of resistor R80, pin 2 of the series switching diode U21 is connected to 3.3V_MCU, and pin 1 is grounded; the other end of resistor R80 is connected to one end of resistor R74 and pin 1 of the dual operational amplifier chip U20A, pin 8 of U20A is connected to 5V_MCU, one end of capacitor C48, the other end of capacitor C48 is grounded, and pin 4 is grounded; pin 2 is connected to the other end of resistor R74 and one end of resistor R77, the other end of resistor R77 is connected to one end of resistors R76 and R75, the other end of resistor R76 is grounded, the other end of resistor R75 is connected to +2.5V_A, pin 3 of U20A is connected to one end of resistors R82 and R81, the other end of resistor R82 is grounded, and the other end of resistor R81 is connected to SMBJ5.0A The 2nd pin of the electrostatic and surge protection diode D11, one end of the capacitor C50, one end of the resistor R79, the 2nd pin of the 2ERJRC-3.81-6P printed circuit board connector socket J7, the other end of the resistor R79 is connected to 5V_MCU, SMBJ5.0A. The 1st pin of the electrostatic and surge protection diode D11, the other end of the capacitor C50 and the 1st pin of the 2ERJRC-3.81-6P printed circuit board connector socket J7 are grounded.

[0034] The analog signal acquisition circuit of a new energy vehicle charging pile is characterized in that the other end of the capacitor C56 in the cc and cp detection circuits (4) is grounded, the other end of the resistor R85 is connected to the 3rd pin of the series switch diode U25 and one end of the resistor R86, the 2nd pin of the series switch diode U25 is connected to 3.3V_MCU, and the 1st pin is grounded; the other end of the resistor R86 is connected to the 1st and 2nd pins of the TPA1862-SR dual-channel operational amplifier chip U24A, and the 8th pin of U24A is connected to +12V, one end of the capacitor C54, one end of the capacitor C53 and a 7812 DC 15V Connect the 3rd pin of the 12V linear voltage regulator chip U22, the other end of the capacitor C54 is grounded, the 3rd pin of U24A is connected to the capacitor C55, one end of the resistor R88, the 3rd pin of the series switching diode U23, one end of the resistor R87, the 1st pin of the series switching diode U23 is grounded, the 2nd pin is connected to one end of the resistors R84 and R83 and +12V, the other end of the resistor R87 is connected to the other end of the resistors R84 and R83 and 2ERJRC-3.81-3P Pin 1 of the printed circuit board connector socket J2 and pin 4 of U24A are grounded, the other end of capacitor C55 is connected to the other end of resistor R88 and grounded; the other end of capacitor C59 is grounded, the other end of resistor R93 is connected to pin 3 of the series switching diode U28 and one end of resistor R94, pin 2 of the series switching diode U28 is connected to 3.3V_MCU, pin 1 is grounded, the other end of resistor R94 is connected to pins 7 and 6 of PTA186Z-SR dual-channel operational amplifier chip U24B, pin 5 of U24B is connected to one end of resistor R95, the other end of resistor R95 is connected to capacitor C58, one end of resistor R96 and pins 1 and 2 of LM211DR comparator chip U26, the other ends of capacitor C58 and resistor R96 are grounded; LM211DR Pin 3 of comparator chip U26 is connected to one end of resistor R90, pin 4 is grounded, pin 7 is connected to one end of resistor R91, pin 8 is connected to the other end of resistor R91 +12V, capacitor C53, one end of capacitor C57 and pin 3 of 7812 chip U22, pin 1 of 7812 chip U22 is connected to capacitors C52, C51 and one end of inductor B2, the other end of inductor B2 is connected to +15V, pin 2 of 7812 U22 is connected to the other end of capacitors C53, C52, C51 and ground; the other end of capacitor C57 is grounded, the other end of resistor R90 is connected to pin 3 of series switching diode U27, pin 2 is connected to +12V, pin 1 is grounded, the other end of resistor R90 is also connected to one end of resistors R92 and R89, the other end of resistor R92 is grounded, the other end of resistor R89 ​​is connected to end 2 of diode D12, and end 1 of diode D12 is connected to 2ERJRC-3.81-3P Pin 2 of the printed circuit board connector socket J2, 2ERJRC-3.81-3P Pin 3 of the printed circuit board connector socket J2 is grounded.

[0035] The analog signal acquisition circuit of a new energy vehicle charging pile is characterized in that the 1st pin of the ADUM1201 digital isolation optocoupler chip U31 in the CAN communication circuit (5) is connected to one end of the capacitor C63 and 3.3V_MCU, the other end of the capacitor C63 is grounded, the 2nd pin of U31 is connected to mcu_can_rx, the 3rd pin is connected to mcu_can_tx and one end of the resistor R99, the other end of the resistor R99 is connected to 3.3V_MCU, the 4th pin of U31 is grounded, the 5th pin is connected to CND_C and the 2nd pin of the PCA82C250 CAN communication protocol chip U30, the 6th pin is connected to the 1st pin of the PCA82C250 CAN communication protocol chip U30, the 7th pin is connected to the 4th pin of U30, the 8th pin is connected to +5V_C, one end of the capacitor C62, C61, one end of the capacitor C60, one end of the diode D13, and the MC7805DPAK DC 12V to 5V converter Pin 3 of the linear voltage regulator power supply chip U29, pin 3 of the PCA82C250 CAN communication protocol chip U30, and the other end of capacitors C61 and C62 are connected to GND_C. Pin 1 of the MC7805DPAK DC 12V to 5V linear voltage regulator power supply chip U29 is connected to the 2 ends of the diode D13 and V_CAN, and pin 2 of U29 is connected to the other end of capacitor C60 and GND_C; Pin 7 of the PCA82C250 CAN communication protocol chip U30 is connected to one end of resistor R98, 2 ends of the P0080TA semiconductor discharge tube D14 and one end of the FSMD050-1206-R self-recovery fuse FU3; Pin 6 of the PCA82C250 CAN communication protocol chip U30 is connected to one end of resistor R97, P0080TA The 2 ends of the semiconductor discharge tube D15 and one end of the resettable fuse FU4, the 5th pin of U30 is connected to the other ends of the resistors R97 and R98 and one end of the capacitor C64, the other end of C64 is connected to CND_C, the 8th pin is connected to one end of the resistor R100, the other end of R100 is connected to GND_C, the 1st end of the semiconductor discharge tubes D14 and D15 of P0080TA is connected to GND_C; the other end of the resettable fuse FU3 is connected to the 2nd pin of the KF1002-02P-R3FLG-ON-02B DIP switch SW2 in the RS485 communication circuit (8) and the 3rd pin of the 2ERJRC-3.81-3P printed circuit board connector socket J3, the other end of the resettable fuse FU4 is connected to one end of the resistor R101 and 2ERJRC-3.81-3P Pin 2 of the printed circuit board connector socket J3, the other end of the resistor R101 is connected to pin 3 of the KF1002-02P-R3FLG-ON_02B dip switch SW2, and pin 1 of the 2ERJRC-3.81-3P printed circuit board connector socket J3 is connected to GND_C.

[0036] The analog signal acquisition circuit of a new energy vehicle charging pile is characterized by insulation detection

[0037] The other end of capacitor C99 in circuit (7) is connected to GND, the other end of resistor R140 is connected to one end of resistor R139 and pin 3 of series switch diode U43, pin 2 of U43 is connected to 3.3V_MCU, and pin 1 of U43 is grounded; the other end of resistor R139 is connected to pins 1 and 2 of TPA1862-SR dual-channel operational amplifier chip U41A, pin 8 of U41A is connected to VCC_I, one end of capacitor C94 and pin 3 of MC7805BDTRKG DC 12V to 5V linear regulated power supply chip U39, pin 1 of DC 12V to 5V linear regulated power supply chip U39 is connected to capacitor C95, one end of capacitor C96 and one end of inductor B4, DC 12V to 5V Pin 2 of the linear voltage regulator power supply chip U39 is connected to the other end of capacitors C94, C95, and C96 and grounded; the other end of the inductor B4 is connected to +15V, the 1 end of the 2CZ4007-SOD123 diode D29, the 2 end of the 2CZ4007-SOD123 diode D29 is connected to one end of the self-recovery fuse FU8, and the other end of the self-recovery fuse FU8 is connected to VCC_R; Pin 4 of the TPA1862-SR dual-channel operational amplifier chip U41A is connected to VCC_I-, one end of the capacitors C73 and C70, the 3rd pin of the MC79M05BDTGL DC negative 12V to negative 5V linear voltage regulator power supply chip U45, the 4th pin of the TPA1862-SR dual-channel operational amplifier chip U46, and the MC79M05BDTGL DC negative 12V to negative 5V Pin 2 of the linear voltage regulator power supply chip U45 is connected to capacitors C75, C76, and one end of the inductor B5. The other end of the inductor B5 is connected to VCC-, MC79M05BDTGL DC negative 12V to negative 5V. Pin 1 of the linear voltage regulator power supply chip U45 is connected to the other ends of capacitors C73, C70, C75, C76 and ground.Pin 3 of the TPA1862-SR dual operational amplifier chip U46 is connected to resistor R147, capacitor C78, ​​and one end of resistor R161. The other ends of capacitor C78 and resistor R161 are connected to capacitor C84, one end of resistor R162, and pin 4 of the ALPP112W power relay U48. Pin 3 of U48 is connected to resistor R162, the other end of capacitor C84, and ground. Pin 1 of U48 is connected to VCC_R and the 2nd end of diode D35. Pin 2 of U48 is connected to the 1st end of diode D35 and the collector of transistor Q9. The base of transistor Q9 is connected to one end of resistors R167 and R169. The emitter of transistor Q9 is connected to the other end of resistor R169 and ground. The other end of resistor R167 is connected to mcu_isu1_k5. The other end of resistor R147 is connected in series with resistors R153, R152, R151, R150 and R149. The other end of resistor R149 is connected to pin 3 of ALDP112W power relay U47 and one end of resistor R155. The other end of resistor R155 is connected in series with resistors R156, R157, R158, R159 and R160. The other end of R160 is connected to ALDP112W The 4-pin connection of power relay U49, the 1-pin of U49 is connected to VCC_R and one end of diode D34, the 2-pin is connected to the other end of diode D34 and the collector of transistor Q8, the 3-pin of ALDP112W power relay U49 is connected to GDN, the base of transistor Q8 is connected to resistors R168 and one end of R170, the other end of R168 is connected to mcu_isu1_k3, the emitter of transistor Q8 is connected to the other end of resistor R170 and ground; the 2-pin of ALDP112W power relay U47 is connected to VCC_R and the 2-end of diode D33, Pin 1 of U47 is connected to end 1 of diode D33 and collector of transistor Q7, base 1 of transistor Q7 is connected to one end of resistors R166 and R165, the other end of resistor R165 is connected to mcu_isu1_k1, emitter of transistor Q7 is connected to the other end of resistor R166 and ground; pin 4 of U47 is connected to pin 1 of BCH-508HS-5GY printed circuit board connector socket J6, pin 5 of J6 is grounded, pin 3 is connected to pin 4 of ALDP112W power line appliance U40, pin 1 of U40 is connected to end 1 of diode D30 and collector 3 of transistor Q4, pin 2 of U40 is connected to the other end of diode D30 and VCC_R; base 1 of transistor Q4 is connected to one end of resistors R141 and R145, the other end of resistor R141 is connected to mcu_isu1_k0, emitter 2 of transistor Q4 is connected to the other end of resistor R145 and ground;The base 1 of transistor Q5 is connected to one end of resistors R144 and R142, the other end of resistor R142 is connected to mcu_isu1_k2, the emitter 2 of transistor Q5 is connected to the other end of resistor R144 and ground, the collector 3 of transistor Q5 is connected to one end of diode D31 and pin 2 of ALP112W power relay U44, pin 3 of ALDP112W power relay U44 is grounded, and the 4th pin is connected in series with resistors R131, R136, and R135 , R134, R133, R132, the other end of resistor R132 is connected to pin 3 of ALDP112W power relay U40 and one end of resistor R125, the other end of resistor R125 is connected in series with resistors R126, R127, R128, R129, R130, the other end of resistor R130 is connected to capacitor C97, one end of resistor R137, pin 3 of TPA1862-SR dual-channel operational amplifier chip U41A, capacitor C97 , the other end of resistor R137 is connected to capacitor C98, one end of resistor R138 and pin 4 of ALPP112W power relay U42, pin 3 of ALPP112W power relay U42 is connected to resistor R138, the other end of capacitor C98 and GND; pin 1 of ALDP112W power relay U44 is connected to the other end of diode D31, VCC_R, pin 1 of ALDP112W power relay U42 and one end of diode D32; the other end of diode D32 is connected to pin 2 of ALDP112W power relay U42 and collector 3 of transistor Q6, base 1 of transistor Q6 is connected to one end of resistors R146 and R143, the other end of resistor R143 is connected to mcu_isu1_k4, emitter of transistor Q6 is connected to resistor 2, the other end of R146 and CND; TPA1862-SR dual-channel operational amplifier Pins 1 and 2 of the amplifier chip U46 are connected to one end of the resistor R154, and the other end of the resistor R154 is connected to the resistor R148 and the 6th pin of U46. The 7th pin of the TPA1862-SR dual-channel operational amplifier chip U46 is connected to the other end of the resistor R148 and the 5th pin of the TPA1862-SR dual-channel operational amplifier chip U41B. The 8th pin of the TPA1862-SR dual-channel operational amplifier chip U46 is connected to VCCI, and the 5th pin is grounded; Pins 6 and 7 of the TPA1862-SR dual-channel operational amplifier chip U14B are connected to one end of the resistor R163, and the other end of R163 is connected to one end of the resistor R164 and the 3rd pin of the series switching diode U50. The 2nd pin of U50 is connected to 3.3V_MCU, and the 1st pin is grounded; the other end of the resistor R164 is connected to one end of the capacitor C86 and mcu_adc_1#isu-, and the other end of the capacitor C86 is grounded. ;

[0038] The analog signal acquisition circuit of a new energy vehicle charging pile is characterized in that the 1st pin of the ADUM1201 digital isolation optocoupler chip U33 in the RS485 communication circuit (8) is connected to one end of the capacitor C67 and 3.3V_MCU, the other end of the capacitor C67 is grounded, the 4th pin of U33 is grounded, the 5th pin of the ADUM1201 digital isolation optocoupler chip U33 is connected to CND_C and the 5th pin of the SN65176BDR RS485 communication protocol chip U32, the 6th pin of U33 is connected to the 4th pin of U32, the 7th pin of U33 is connected to the 1st pin of U32, the 8th pin of U33 is connected to the 4th pin of U32 and the HMHA281 isolation optocoupler chip U34, +5V_C and one end of the capacitors C66 and C65, the other end of C66 and C65 is connected to GND_C, and the HMHA281 Pin 1 of the isolation optocoupler chip U34 is connected to one end of resistor R105, the other end of resistor R105 is connected to one end of resistor R106 and mcu_uart1_dr, the other end of resistor R106 is grounded, pin 2 of U34 is grounded, pin 3 of U34 is connected to one end of resistor R107 and pins 2 and 3 of the SN65176BDR RS485 communication protocol chip U32, the other end of resistor R107 is connected to CND_C, SN65176BDRRS485 communication protocol chip U32's pin 7 is connected to one end of resistor R104, one end of diode D17 and one end of FSMD050-1206-R resettable fuse FU6, SN65176BDR RS485 Pin 6 of the communication protocol chip U32 is connected to one end of the resistor R103, one end of the diode D16 and one end of the FSMD050-1206-R resettable fuse FU5, the other ends of the diodes D16 and D17 are connected to CND_C, the other end of the resistor R104 is connected to CND_C, the other end of the resistor R103 is connected to +5V_C, the other end of the FSMD050-1206-R resettable fuse FU5 is connected to end 1 of the KF1002-02P-R3FLG-ON-02B DIP switch SW2 and pin 3 of the 2ERJRC-3.81-3P printed circuit board connector socket J4, the other end of the FSMD050-1206-R resettable fuse FU6 is connected to one end of the resistor R102 and pin 2 of the 2ERJRC-3.81-3P printed circuit board connector socket J4, the other end of the resistor R102 is connected to KF1002-02P-R3FLG-ON-02B Pin 4 of the DIP switch SW2 and pin 1 of the 2ERJRC-3.81-3P printed circuit board connector socket J4 are connected to CND_C.

[0039] The utility model power supply circuit 6 includes a transformer H, wherein the 9th terminal of the coil H1 of the transformer H is connected to a capacitor C71, resistors R110 and R109, one end of a capacitor C100, +24V, one end of an electrolytic capacitor C101, pin 1 of a MC7815CDTRKG DC 24V to 15V linear voltage-stabilized power supply chip U35, one end of an SLF7045T-150M power inductor L1, the other end of L1 is connected to an electrolytic capacitor C102, two ends of a P6SMB27A electrostatic and surge protection diode D22 and two ends of a Schottky diode D21, one end of D21 is connected to one end of a JK60-090 fuse FU7, and the other end of FU7 is connected to a BCH-508HS-2GY printed circuit board connector socket J5 The 2nd foot of the transformer coil H1 is connected to one end of the IN4007 diode D20, one end of the capacitor C80 and the IRF540NSTRLPBF N Pin 2 of the channel field effect transistor Q3 and the other end of the IN4007 diode D20 are connected to the other end of the capacitor C71, the resistors R110 and R109, Pin 1 of Q3 is connected to one end of the resistors R115 and R112, Pin 3 of Q3 is connected to one end of the resistors R117, R116 and R114, the other end of the resistor R115 and the other end of the capacitor C80, the other end of the resistor R112 is connected to Pin 6 of the UC3845BVD1R2G high-performance current mode PWM control chip U36, Pin 3 of U36 is connected to capacitor C83 and one end of the resistor R114, Pin 5 of U36 is connected to the other end of the capacitor C83, CND_A, the other end of the resistors R116 and R117 and one end of the capacitor C82, Pin 1 of U36 is connected to LTV-816TSLITE Pin 4 of the thyristor signal output optocoupler chip U37 and one end of the resistor R118, pin 2 of U36 is connected to CND_A, pin 4 is connected to resistor R113 and one end of capacitor C82, pin 8 is connected to the other end of resistor R113 and the other end of resistor R118, pin 7 of U36 is connected to one end of capacitor C77, POUT_+15 and pin 3 of the MC7815CDTRKG DC 24V to 15V linear voltage regulator chip U35, pin 2 of U35 is connected to the other end of capacitors C77, C101, C102, GND_A, end 1 of diode D22, pin 3 of LTV-816TSLITE thyristor signal output optocoupler chip U37, pin 1 of BCH-508HS-2GY printed circuit board connector socket J5, one end of capacitor C81, and the other end of capacitor C81 is connected to GND_EARTH;Pin 1 of U37 is connected to one end of capacitor C89, resistors R119, R120, and R122, and the other ends of capacitors C89, resistors R119, and R120 are connected to +15V and one end of resistor R121. Pin 2 of U37 is connected to the other end of resistor R122, one end of capacitor C90, one end of resistor R123, and pin 1 of voltage reference chip U38. Pin 2 of U38 is connected to resistor R124, and capacitors C93, C90, one end of resistor R121, and the other end of capacitor C93 are connected to the other end of resistor R123. Pin 3 of U38 is connected to the other end of resistor R124 and ground. Terminal 6 of coil H6 of transformer H is connected to one end of resistor R108 and terminal 1 of MURA120T3 fast recovery diode D18. The other end of resistor R108 is connected to one end of capacitor C68, and the other end of capacitor C68 is connected to MURA120T3 Terminal 2 of the fast recovery diode D18, capacitors C104, C72, one end of the SMF10A electrostatic and surge protection diode D19 and V_S1, terminal 7 of H6 is connected to capacitor C104, capacitor C72, the other end of the SMF10A electrostatic and surge protection diode D19 and CND_S1; Terminal 2 of the coil H5 of the transformer H is connected to one end of R111 and one end of the diode D23, the other end of the resistor R111 is connected to one end of the capacitor C74, the other end of the capacitor C74 is connected to two ends of the diode D23, capacitors C105, C79, one end of the diode D24 and V_S2, and terminal 1 of the coil H5 is connected to capacitors C105, C79, the other end of the diode D24 and G ND_S2; The 14th terminal of transformer H coil H4 is connected to the 1st terminal of diode D25, the other terminal of diode D25 is connected to one end of capacitor C107, one end of inductor L10805 / 6L8(1R5)B3, the other end of B3 is connected to one end of capacitor C106, C85 and +15V, the 13th terminal of transformer H coil H4 is connected to capacitor C107, the other ends of C106, C85 and CND, the 12th terminal of H3 is connected to MURA120T3 One end of the fast recovery diode D26 and the other end of the MURA120T3 fast recovery diode D26 are connected to capacitors C88, C87, one end of the diode D27 and VCC-, and the other ends of the capacitors C88, C87 and D27 are connected and connected to GND; the 11 end of the transformer H coil H2 is connected to one end of the MURA120T3 fast recovery diode D28, and the other end of the MURA120T3 fast recovery diode D28 is connected to one end of the capacitors C91, C92 and V_CAN, and the 10 end of the transformer H coil H2 is connected to the other end of the capacitors C91, C92 and GND_C. ;

[0040] The analog signal acquisition circuit of the new energy vehicle charging pile can collect multiple analog signals during the charging process of the charging pile, and exchange information with the outside through the CAN communication interface or RS485 communication interface. All analog signals are centrally collected, uniformly reported, and uniformly processed, and then interact with the outside through the communication interface. This can achieve complete isolation of analog signals and digital signals; it can strengthen the complete isolation of weak current areas and strong current areas; it ensures the personal safety of users, debuggers and after-sales personnel; for enterprises, the complete modular design makes the design faster and more efficient, reduces time costs, and accelerates the speed of product development; designers can well ensure the safe spacing and safe creepage distance of different power supply areas; enhance the anti-interference ability of the analog signal acquisition circuit.

Claims

1. A new energy vehicle charging pile analog signal acquisition circuit, comprising a power supply circuit (6), characterized in that A new energy vehicle charging pile analog signal acquisition circuit (9) is set up in the system; the new energy vehicle charging pile analog signal acquisition circuit (9) is composed of an STM32F103C8T6 single chip microcomputer U1, wherein pin 1 of the single chip microcomputer U1 is connected to 3.3V_MCU, pin 3 is connected to the 2 ends of the light emitting diode D1, the 1 end of the light emitting diode D1 is connected to one end of the resistor R18, the other end of the resistor R18 is connected to 3.3V_MCU, pin 7 of the STM32F103C8T6 single chip microcomputer U1 is connected to capacitor C5 and one end of resistor R13, the other end of capacitor C5 is grounded, the other end of resistor R13 is connected to 3.3V_MCU, pin 20 is connected to one end of resistor R11, the other end of resistor R11 is connected to one end of resistor R12, and pin 44 is connected to the One end of resistor R9, the other end of resistor R9 is connected to one end of resistor R10, the other ends of resistor R10 and resistor R12 are grounded, pin 5 is connected to pin 1 of SMD-8MHZ3225-4P passive crystal oscillator Y1 and one end of capacitor C3, pin 6 is connected to pin 3 of SMD-8MHZ3225-4P passive crystal oscillator Y1 and one end of capacitor C4, the other ends of capacitors C3 and C4 are connected to pin 4 and pin 2 of SMD-8MHZ3225-4P passive crystal oscillator Y1 and grounded, pins 32 and 33 are connected to pins 2 and 3 of SWD1 socket respectively, pin 1 of SWD1 socket is connected to 3.3V_MCU, pin 4 is grounded, and pin 42 is connected to one end of resistor R7 and 24LC256T-ISN Pin 6 and 43 of EEPROM chip U3 are connected to one end of resistor R8 and pin 5 of 24LC256T-ISN EEPROM chip U3. The other end of resistors R7 and R8 are connected to one end of capacitor C2, 3.3V_MCU and pin 8 of 24LC256T-ISN EEPROM chip U3. The other end of capacitor C2 is connected to pin 7 of U3 and ground. Pins 1, 2, 3, and 4 of chip U3 are grounded, pin 21 of U1 is connected to one end of resistor R14 and pin 5 of KF1002-04P-R3GLG-DFT-02B DIP switch SW1, pin 2 is connected to one end of resistor R17 and pin 6 of KF1002-04P-R3GLG-DFT-02B DIP switch SW1, pin 45 is connected to one end of resistor R16 and pin 7 of KF1002-04P-R3GLG-DFT-02B DIP switch SW1, pin 46 is connected to one end of resistor R15 and pin 8 of KF1002-04P-R3GLG-DFT-02B DIP switch SW1, and the other ends of resistors R14, R15, R16, and R17 are all connected to 3.3V_MCU, SW1- KF1002-04P-R3GLG-DFT-02B The 1, 2, 3, and 4 pins of the DIP switch SW1 are all grounded; The 12th pin of the STM32F103C8T6 single-chip computer U1 is connected to the resistor R30 and one end of the capacitor C20 in the voltage detection circuit (1) of the charging module output end; The 11th and 10th pins of the single-chip computer U1 are respectively connected to the resistor R42, one end of the capacitor C27 and one end of the resistor R52, one end of the capacitor C38 in the battery voltage detection circuit and the charging current detection circuit (2) of the new energy vehicle charging pile; The 15th pin of the STM32F103C8T6 single-chip computer U1 is connected to the resistor R78 and one end of the capacitor C49 in the charging gun temperature detection circuit (3), the 19th pin is connected to the resistor R70 and one end of the capacitor C46, ​​and the 18th pin is connected to the resistor R62 and one end of the capacitor C44; STM32F103C8T6 Pin 13 of the single-chip microcomputer U1 is connected to one end of the resistor R85 and capacitor C56 in the cc and cp detection circuit (4), and pin 14 is connected to one end of the resistor R93 and capacitor C59; pins 34 and 37 of the STM32F103C8T6 single-chip microcomputer U1 are connected to pins 2 and 3 of the ADUM1201 digital isolation optocoupler chip U31 in the CAN communication circuit (5); pins 25, 26, 27, 28, 29 and 4 of the STM32F103C8T6 single-chip microcomputer U1 are respectively connected to mcu_isu1_k4, mcu_isu1_k5, mcu_isu1_k0, mcu_isu1_k1, mcu_isu1_k3 and mcu_isu1_k2, 17, 16 in the charging pile insulation detection circuit (7). Pins 38, 39, 41 and 40 are connected to one end of resistors R6, R5, R4, R3, R2 and R1 respectively; the other end of resistor R6 is connected to pin 5 of ADS1118IDGSR 16-bit analog-to-digital conversion chip U2 and mcu_adc_1#isu+ in insulation detection circuit 7, the other end of resistor R5 is connected to pin 4 of ADS1118IDGSR 16-bit analog-to-digital conversion chip U2 and mcu_adc_1#isu- in insulation detection circuit 7, the other end of resistors R4, R3, R2 and R1 are connected to pins 2, 1, 10 and 9 of ADS1118IDGSR 16-bit analog-to-digital conversion chip U2 respectively; pin 8 of ADS1118IDGSR 16-bit analog-to-digital conversion chip U2 is connected to one end of capacitor C1 and 3.3V_MCU, the other end of capacitor C1 is grounded; pin 3 of ADS1118IDGSR 16-bit analog-to-digital conversion chip U2 is grounded; pins 31, 30, and 22 of STM32F103C8T6 microcontroller U1 are connected to mcu_uart1_rx, mcu_uart1_tx, and mcu_uart1_dr respectively; pins 8, 23, 35, and 47 of STM32F103C8T6 microcontroller U1 are grounded, and pins 9, 24, 36, and 48 of U1 are connected to one end of capacitors C6, C7, C8, C9, and C12, one end of resistors R19 and R20, and DC 5V to DC 3.3V linear regulator chip LM1117-3.3-SO223 Pin 2 and 4 of U5 are connected to 3.3V_MCU; the other end of capacitors C6, C7, C8, and C9 are grounded; the other end of resistor R19 is connected to the 1 end of SMD LED D2; DC 5V to DC 3.3V linear voltage regulator chip LM1117-3.3-SO223 Pin 3 of U5 is connected to the 3 end of DC 15V to DC 5V linear voltage regulator chip 7805 Pin 3 of U4, one end of capacitors C10 and C11 and 5V_MCU; DC 15V to DC 5V linear voltage regulator chip 7805 Pin 1 of U4 is connected to one end of capacitors C13 and C14 and one end of inductor B1, and the other end of inductor B1 is connected to +15V; DC 5V to DC 3.3V linear voltage regulator chip LM1117-3.3-SO223 Pin 1 of U5 is connected to the 2nd end of the chip light emitting diode D2, the other end of the resistor R20, the other end of the capacitors C12, C11, C10, C13, C14, the 2nd end of the DC 15V to DC 5V linear voltage regulator chip 7805 U4 and grounded.

2. A new energy vehicle charging pile analog signal acquisition circuit according to claim 1, characterized in that The invention comprises a voltage detection circuit (1) at the output end of a charging module of a new energy vehicle charging pile, wherein the other end of a capacitor C20 in the circuit is grounded, the other end of a resistor R30 is connected to the 3rd pin of a series switch diode U8 and one end of a resistor R29, the 2nd pin of the series switch diode U8 is connected to 3.3V_MCU, the 1st pin is grounded, the other end of the resistor R29 is connected to the resistor R21, one end of a capacitor C16 and the 1st pin of a TPA1862-SR dual-channel operational amplifier chip U7A, the 3rd pin of the TPA1862-SR dual-channel operational amplifier chip U7A is grounded and the 5th pin of a HCNR200 isolation optical coupler chip UA1 and one end of a capacitor C21, the 4th pin of the TPA1862-SR dual-channel operational amplifier chip U7A is connected to the other end of the capacitor C21 and VCC_I-; the 2nd pin of the TPA1862-SR dual-channel operational amplifier chip U7A is connected to the resistor R21 and the other end of the capacitor C16, and is connected to the HCNR200 isolation optical coupler chip UA1. Pin 6 of the isolated optocoupler chip UA1 is connected, and pin 8 of the TPA1862-SR dual-channel operational amplifier chip U7A is connected to VCC_I and one end of capacitor C17, and the other end of capacitor C17 is grounded; Pin 4 of UA1 is connected to GND_S1, and pin 3 is connected to one end of capacitor C18, pin 6 of the TPA1862-SR dual-channel operational amplifier chip U6 and one end of resistor R22, and pin 2 of the HCNR200 isolated optocoupler chip UA1 is connected to V_S1 and one end of capacitor C15, and the other end of C15 is connected to GND_S1, Pin 1 of UA1 is connected to one end of resistor R23, the other end of resistor R23 is connected to pin 2 of transistor Q1, pin 3 of Q1 is connected to GND_S1, pin 1 is connected to one end of capacitor C18 and pin 7 of dual-channel operational amplifier chip U6, pins 1 and 2 of dual-channel operational amplifier chip U6 are connected to the other end of resistor R22, pins 4 and 5 of dual-channel operational amplifier chip U6 are connected to GND_S1, and pin 8 is connected to V_S1; pin 3 of dual-channel operational amplifier chip U6 is connected to two ends of SMBJ5.0A electrostatic and surge protection diode D5, capacitor C19, one end of resistors R25 and R27, one end of diode D5 is connected to the other end of capacitor C19, one end of resistor R33, GND_S1 and BCH-508HS-8GY printed circuit board connector socket J1. The other end of resistor R33 is connected to the other end of resistor R25, resistors R27, R32, R24, R26, R31, and R28 are connected in series, the other end of resistor R28 is connected to ends 2 of FR107FR1M fast recovery diode D4, one end of diode D4 is connected to ends 2 of FR107FR1M fast recovery diode D3, and one end of FR107FR1M fast recovery diode D3 is connected to pin 8 of BCH-508HS- 8GY printed circuit board connector socket J1.

3. A new energy vehicle charging pile analog signal acquisition circuit according to claim 1, characterized in that The invention comprises a new energy vehicle battery terminal voltage and charging current detection circuit (2), wherein the other end of the capacitor C27 in the circuit is grounded, the other end of the resistor R42 is connected to the 3rd pin of the series switch diode U10 and one end of the resistor R41, the 2nd pin of the series switch diode U10 is connected to 3.3V_MCU, the 1st pin is grounded, the other end of the resistor R41 is connected to the resistor R35, one end of the capacitor C25 and the 7th pin of the TPA1862-SR dual-channel operational amplifier chip U7B, the 5th pin of the TPA1862-SR dual-channel operational amplifier chip U7B is grounded and the 5th pin of the HCNR200 isolation optical coupler chip UA2, the 6th pin of the TPA1862-SR dual-channel operational amplifier chip U7B is connected to the resistor R35 and the other end of the capacitor C25, and is also connected to the 6th pin of the HCNR200 isolation optical coupler chip UA2, Pin 4 of UA2 is connected to GND_S2, pin 3 is connected to one end of capacitor C26, pin 6 of TPA1862-SR dual-channel operational amplifier chip U9 and one end of resistor R34, pin 2 of HCNR200 isolation optocoupler chip UA2 is connected to V_S2 and one end of capacitor C22, the other end of C22 is connected to GND_S2, pin 1 of UA2 is connected to one end of resistor R39, the other end of resistor R39 is connected to pin 2 of transistor Q2, pin 3 of Q2 is connected to GND_S2, pin 1 is connected to one end of capacitor C26 and pin 7 of dual-channel operational amplifier chip U9, pins 1 and 2 of dual-channel operational amplifier chip U9 are connected to the other end of resistor R34, pins 4 and 5 of dual-channel operational amplifier chip U9 are connected to GND_S2, and pin 8 is connected to V_S2 and capacitor C23 One end of the capacitor C23 is connected to GND_S2; Pin 3 of the dual operational amplifier chip U9 is connected to the 2 ends of the SMBJ5.0A electrostatic and surge protection diode D6, capacitor C24, resistors R38, and one end of R40. One end of the diode D6 is connected to the other end of the capacitor C24, one end of the resistor R46, and GND_S2. The other end of the resistor R38 is connected to the other end of the resistor R46. Resistors R40, R45, R37, R36, R44, and R43 are connected in series. The other end of the resistor R43 is connected to the 2 ends of the FR107FR1M fast recovery diode D8, one end of the diode D8 is connected to the 2 ends of the FR107FR1M fast recovery diode D7, and one end of the FR107FR1M fast recovery diode D7 is connected to the BCH-508HS-8GY printed circuit board connector socket J1. The other end of capacitor C38 is connected to pin 4; the other end of resistor R52 is connected to pin 3 of series switch diode U15 and one end of resistor R51; pin 1 of series switch diode U15 is connected to ground, and pin 2 is connected to pin 3.3V_MCU, the other end of resistor R51 is connected to resistor R47, one end of capacitor C34, and pin 1 of TPA1862-SR dual operational amplifier chip U14A, pin 8 of U14A is connected to VCC_I, one end of capacitor C35, and the other end of capacitor C35 is grounded, pin 4 is connected to one end of capacitor C40 and VCC_I-, and the other end of capacitor C40 is grounded, the other end of resistor R47 and capacitor C34 are connected to pin 2 of U14A and one end of resistor R53, and the other end of resistor R53 is connected to pin 6 of HCPL-7840 optical coupler isolation chip U12, pin 3 of U14A is connected to capacitor C39, resistor R54, and one end of resistor R49, and the other end of resistor R54 and capacitor C39 is grounded, and the other end of resistor R49 is connected to HCPL-7840 Pin 7 of the optocoupler isolation chip U12 and pin 8 of U12 are connected to one end of capacitors C28 and C29 and VCC_I, the other ends of capacitors C28 and C29 are grounded, pin 5 of U12 is grounded, pins 3 and 4 are connected to GND_S2, pin 3 of U13, one end of resistor R50, one end of capacitor C36, one end of capacitor C37, one end of fuse FU2, HCPL-7840. Pin 2 of the optocoupler isolation chip U12 is connected to pins 1 and 2 of U13, the other end of resistor R50, the other end of capacitor C36, and one end of resistor R48. The other end of resistor R48 is connected to the other end of capacitor C37 and pin 3 of U11, one end of fuse FU1, and the other ends of fuses FU1 and FU2 are connected to pins 1 and 2 of BCH-508HS- 8 GY printed circuit board connector socket J1 respectively; HCPL-7840 Pin 1 of the optocoupler isolation chip U12 is connected to capacitors C30, C33, C32, +5V_S2 and pin 3 of the 7805DPAK DC 12V to 5V linear voltage regulator chip U51. The other ends of capacitors C30, C33, and C32 are connected to pin 2 of U51 and GND_S2, one end of capacitor C31, and pin 1 of U11. Pin 1 of the 7805DPAK DC 12V to 5V linear voltage regulator chip U51 is connected to one end of capacitor C31, pin 2 of U11, and V_S2. .

4. A new energy vehicle charging pile analog signal acquisition circuit according to claim 1, characterized in that The other end of the capacitor C44 in the charging gun temperature detection circuit (3) is grounded, the other end of the resistor R62 is connected to the 3rd pin of the series switching diode U18 and one end of the resistor R61, the 2nd pin of U18 is connected to 3.3V_MCU, and the 1st pin of U18 is grounded; the other end of the resistor R61 is connected to the 1st pin of the TPA1862-SR dual-channel operational amplifier chip U17A and one end of the resistor R55, the 8th pin of U17A is connected to the 5V_MCU, one end of the capacitor C41, and the other end of the capacitor C41 The end is grounded, the 2nd pin is connected to the other end of the resistor R55 and one end of the resistor R59, the other end of the resistor R59 is connected to one end of the resistors R58 and R57, the other end of the resistor R58 is grounded, the other end of the resistor R57 is connected to the capacitor C43, +2.5V_A, the 2nd and 1st pins of the TL431BIDBZR voltage reference chip U16 and one end of the resistor R56, the other end of the resistor R56 is connected to 5V_MCU and one end of the capacitor C42, and the other end of the capacitor C42 is grounded; TL431BIDBZR Pin 3 of the voltage reference chip U16 is connected to the other end of the capacitor C43 and the ground; Pin 4 of the TPA1862-SR dual operational amplifier chip U17A is grounded, and pin 3 is connected to one end of resistors R64 and R63, the other end of resistor R64 is grounded, the other end of resistor R63 is connected to the 2 ends of the electrostatic and surge protection diode D9, one end of capacitor C45, one end of resistor R60 and 2ERJRC-3.81-6P; Pin 6 of the printed circuit board connector socket J7, the other end of resistor R60 is connected to 5V_MCU, the 1 end of the electrostatic and surge protection diode D9 is connected to GND, the other end of capacitor C45 and 2ERJRC-3.81-6P Pin 5 of the printed circuit board connector socket J7; the other end of capacitor C46 is grounded, the other end of resistor R70 is connected to pin 3 of the series switching diode U19 and one end of resistor 69, pin 2 of U19 is connected to 3.3V_MCU, pin 1 is grounded, the other end of resistor R69 is connected to one end of resistor R65 and pin 7 of TPA1862-SR dual operational amplifier chip U17B, pin 6 of U17B is connected to the other end of resistor R65 and one end of resistor R68, the other end of resistor R68 is connected to one end of resistors R67 and R66, the other end of resistor R67 is grounded, the other end of resistor R66 is connected to +2.5V_A, pin 5 of U17B is connected to one end of resistors R73 and R72, the other end of resistor R73 is grounded, the other end of resistor R72 is connected to two ends of SMBJ5.0A electrostatic and surge protection diode D10, one end of resistor R71 and 2ERJRC-3.81-6P Pin 4 of the printed circuit board connector socket J7 and one end of the capacitor C47, and the other end of the resistor R71 are connected to 5V_MCU, and the 1 end of the SMBJ5.0A electrostatic and surge protection diode D10 is connected to the other end of the capacitor C47 and the 3rd pin of the 2ERJRC-3.81-6P printed circuit board connector socket and grounded; the other end of the capacitor C49 is grounded, and the other end of the resistor R78 is connected to the 3rd pin of the series switch diode U21 and one end of the resistor R80, and the 2nd pin of the series switch diode U21 is connected to 3.3V_MCU, pin 1 is grounded; the other end of resistor R80 is connected to one end of resistor R74 and pin 1 of dual-channel operational amplifier chip U20A, pin 8 of U20A is connected to 5V_MCU and one end of capacitor C48, the other end of capacitor C48 is grounded, and pin 4 is grounded; pin 2 is connected to the other end of resistor R74 and one end of resistor R77, the other end of resistor R77 is connected to one end of resistors R76 and R75, the other end of resistor R76 is grounded, the other end of resistor R75 is connected to +2.5V_A, pin 3 of U20A is connected to one end of resistors R82 and R81, the other end of resistor R82 is grounded, the other end of resistor R81 is connected to pin 2 of SMBJ5.0A electrostatic and surge protection diode D11, one end of capacitor C50, and one end of resistor R79 2ERJRC-3.81-6P Pin 2 of the PCB connector socket J7, the other end of resistor R79 is connected to 5V_MCU, Pin 1 of SMBJ5.0A electrostatic and surge protection diode D11, the other end of capacitor C50 and Pin 1 of 2ERJRC-3.81-6P PCB connector socket J7 are grounded.

5. The analog signal acquisition circuit for a new energy vehicle charging pile according to claim 1 is characterized in that The other end of the capacitor C56 in the cc and cp detection circuit (4) is grounded, the other end of the resistor R85 is connected to the 3rd pin of the series switch diode U25 and one end of the resistor R86, the 2nd pin of the series switch diode U25 is connected to 3.3V_MCU, and the 1st pin is grounded; the other end of the resistor R86 is connected to the 1st and 2nd pins of the TPA1862-SR dual-channel operational amplifier chip U24A, the 8th pin of U24A is connected to +12V, one end of the capacitor C54, one end of the capacitor C53 and the 7812 DC 15V Connect the 3rd pin of the 12V linear voltage regulator chip U22, the other end of the capacitor C54 is grounded, the 3rd pin of U24A is connected to the capacitor C55, one end of the resistor R88, the 3rd pin of the series switching diode U23, one end of the resistor R87, the 1st pin of the series switching diode U23 is grounded, the 2nd pin is connected to one end of the resistors R84 and R83 and +12V, the other end of the resistor R87 is connected to the other end of the resistors R84 and R83 and 2ERJRC-3.81-3P Pin 1 of the printed circuit board connector socket J2 and pin 4 of U24A are grounded, the other end of capacitor C55 is connected to the other end of resistor R88 and grounded; the other end of capacitor C59 is grounded, the other end of resistor R93 is connected to pin 3 of the series switching diode U28 and one end of resistor R94, pin 2 of the series switching diode U28 is connected to 3.3V_MCU, pin 1 is grounded, the other end of resistor R94 is connected to pins 7 and 6 of PTA186Z-SR dual-channel operational amplifier chip U24B, pin 5 of U24B is connected to one end of resistor R95, the other end of resistor R95 is connected to capacitor C58, one end of resistor R96 and pins 1 and 2 of LM211DR comparator chip U26, the other ends of capacitor C58 and resistor R96 are grounded; LM211DR Pin 3 of comparator chip U26 is connected to one end of resistor R90, pin 4 is grounded, pin 7 is connected to one end of resistor R91, pin 8 is connected to the other end of resistor R91 +12V, capacitor C53, one end of capacitor C57 and pin 3 of 7812 chip U22, pin 1 of 7812 chip U22 is connected to capacitors C52, C51 and one end of inductor B2, the other end of inductor B2 is connected to +15V, pin 2 of 7812 U22 is connected to the other end of capacitors C53, C52, C51 and ground; the other end of capacitor C57 is grounded, the other end of resistor R90 is connected to pin 3 of series switching diode U27, pin 2 is connected to +12V, pin 1 is grounded, the other end of resistor R90 is also connected to one end of resistors R92 and R89, the other end of resistor R92 is grounded, the other end of resistor R89 ​​is connected to end 2 of diode D12, and end 1 of diode D12 is connected to 2ERJRC-3.81-3P Pin 2 of the printed circuit board connector socket J2, 2ERJRC-3.81-3P Pin 3 of the printed circuit board connector socket J2 is grounded.

6. The analog signal acquisition circuit for a new energy vehicle charging pile according to claim 1 is characterized in that In the CAN communication circuit (5), the 1st pin of the ADUM1201 digital isolation optocoupler chip U31 is connected to one end of the capacitor C63 and 3.3V_MCU, the other end of the capacitor C63 is grounded, the 2nd pin of U31 is connected to mcu_can_rx, the 3rd pin is connected to mcu_can_tx and one end of the resistor R99, the other end of the resistor R99 is connected to 3.3V_MCU, the 4th pin of U31 is grounded, the 5th pin is connected to CND_C and the 2nd pin of the PCA82C250 CAN communication protocol chip U30, the 6th pin is connected to the 1st pin of the PCA82C250 CAN communication protocol chip U30, the 7th pin is connected to the 4th pin of U30, the 8th pin is connected to +5V_C, one end of the capacitors C62 and C61, one end of the capacitor C60, the 1st end of the diode D13, the 3rd pin of the MC7805DPAK DC 12V to 5V linear regulated power supply chip U29, the PCA82C250 CAN Pin 3 of the communication protocol chip U30 and the other end of capacitors C61 and C62 are connected to GND_C. Pin 1 of the MC7805DPAK DC 12V to 5V linear voltage regulator chip U29 is connected to the 2 ends of the diode D13 and V_CAN, and the 2 ends of U29 are connected to the other end of capacitor C60 and GND_C. Pin 7 of the PCA82C250 CAN communication protocol chip U30 is connected to one end of resistor R98, the 2 ends of the P0080TA semiconductor discharge tube D14 and one end of the FSMD050-1206-R self-recovery fuse FU3. Pin 6 of the PCA82C250 CAN communication protocol chip U30 is connected to one end of resistor R97, the P0080TA The 2 ends of the semiconductor discharge tube D15 and one end of the resettable fuse FU4, the 5th pin of U30 is connected to the other ends of the resistors R97 and R98 and one end of the capacitor C64, the other end of C64 is connected to CND_C, the 8th pin is connected to one end of the resistor R100, the other end of R100 is connected to GND_C, the 1st end of the semiconductor discharge tube D14 and D15 of P0080TA is connected to GND_C; the other end of the resettable fuse FU3 is connected to the 2nd pin of the KF1002-02P-R3FLG-ON-02B DIP switch SW2 in the RS485 communication circuit (8) and the 3rd pin of the 2ERJRC-3.81-3P printed circuit board connector socket J3, the other end of the resettable fuse FU4 is connected to one end of the resistor R101, 2ERJRC-3.81-3P Pin 2 of the printed circuit board connector socket J3, the other end of the resistor R101 is connected to pin 3 of the KF1002-02P-R3FLG-ON_02B dip switch SW2, and pin 1 of the 2ERJRC-3.81-3P printed circuit board connector socket J3 is connected to GND_C.

7. The analog signal acquisition circuit for a new energy vehicle charging pile according to claim 1 is characterized in that The other end of capacitor C99 in insulation detection circuit (7) is connected to GND, the other end of resistor R140 is connected to one end of resistor R139 and pin 3 of series switch diode U43, pin 2 of U43 is connected to 3.3V_MCU, and pin 1 of U43 is grounded; the other end of resistor R139 is connected to pins 1 and 2 of TPA1862-SR dual-channel operational amplifier chip U41A, pin 8 of U41A is connected to VCC_I, one end of capacitor C94 and pin 3 of MC7805BDTRKG DC 12V to 5V linear regulated power supply chip U39, pin 1 of DC 12V to 5V linear regulated power supply chip U39 is connected to capacitor C95, one end of capacitor C96 and one end of inductor B4, DC 12V to 5V Pin 2 of the linear voltage regulator power supply chip U39 is connected to the other end of capacitors C94, C95, and C96 and grounded; the other end of the inductor B4 is connected to +15V, the 1 end of the 2CZ4007-SOD123 diode D29, the 2 end of the 2CZ4007-SOD123 diode D29 is connected to one end of the self-recovery fuse FU8, and the other end of the self-recovery fuse FU8 is connected to VCC_R; Pin 4 of the TPA1862-SR dual-channel operational amplifier chip U41A is connected to VCC_I-, one end of the capacitors C73 and C70, the 3rd pin of the MC79M05BDTGL DC negative 12V to negative 5V linear voltage regulator power supply chip U45, the 4th pin of the TPA1862-SR dual-channel operational amplifier chip U46, and the MC79M05BDTGL DC negative 12V to negative 5V Pin 2 of the linear voltage regulator power supply chip U45 is connected to capacitors C75, C76, and one end of the inductor B5. The other end of the inductor B5 is connected to VCC-, MC79M05BDTGL DC negative 12V to negative 5V. Pin 1 of the linear voltage regulator power supply chip U45 is connected to the other ends of capacitors C73, C70, C75, C76 and ground.Pin 3 of the TPA1862-SR dual operational amplifier chip U46 is connected to resistor R147, capacitor C78, ​​and one end of resistor R161. The other ends of capacitor C78 and resistor R161 are connected to capacitor C84, one end of resistor R162, and pin 4 of the ALPP112W power relay U48. Pin 3 of U48 is connected to resistor R162, the other end of capacitor C84, and ground. Pin 1 of U48 is connected to VCC_R and the 2nd end of diode D35. Pin 2 of U48 is connected to the 1st end of diode D35 and the collector of transistor Q9. The base of transistor Q9 is connected to one end of resistors R167 and R169. The emitter of transistor Q9 is connected to the other end of resistor R169 and ground. The other end of resistor R167 is connected to mcu_isu1_k5. The other end of resistor R147 is connected in series with resistors R153, R152, R151, R150 and R149. The other end of resistor R149 is connected to pin 3 of ALDP112W power relay U47 and one end of resistor R155. The other end of resistor R155 is connected in series with resistors R156, R157, R158, R159 and R160. The other end of R160 is connected to ALDP112W The 4-pin connection of power relay U49, the 1-pin of U49 is connected to VCC_R and one end of diode D34, the 2-pin is connected to the other end of diode D34 and the collector of transistor Q8, the 3-pin of ALDP112W power relay U49 is connected to GDN, the base of transistor Q8 is connected to resistors R168 and one end of R170, the other end of R168 is connected to mcu_isu1_k3, the emitter of transistor Q8 is connected to the other end of resistor R170 and ground; the 2-pin of ALDP112W power relay U47 is connected to VCC_R and the 2-end of diode D33, Pin 1 of U47 is connected to end 1 of diode D33 and collector of transistor Q7, base 1 of transistor Q7 is connected to one end of resistors R166 and R165, the other end of resistor R165 is connected to mcu_isu1_k1, emitter of transistor Q7 is connected to the other end of resistor R166 and ground; pin 4 of U47 is connected to pin 1 of BCH-508HS-5GY printed circuit board connector socket J6, pin 5 of J6 is grounded, pin 3 is connected to pin 4 of ALDP112W power line appliance U40, pin 1 of U40 is connected to end 1 of diode D30 and collector 3 of transistor Q4, pin 2 of U40 is connected to the other end of diode D30 and VCC_R; base 1 of transistor Q4 is connected to one end of resistors R141 and R145, the other end of resistor R141 is connected to mcu_isu1_k0, emitter 2 of transistor Q4 is connected to the other end of resistor R145 and ground;The base 1 of transistor Q5 is connected to one end of resistors R144 and R142, the other end of resistor R142 is connected to mcu_isu1_k2, the emitter 2 of transistor Q5 is connected to the other end of resistor R144 and ground, the collector 3 of transistor Q5 is connected to one end of diode D31 and pin 2 of ALP112W power relay U44, pin 3 of ALDP112W power relay U44 is grounded, and the 4th pin is connected in series with resistors R131, R136, and R135 , R134, R133, R132, the other end of resistor R132 is connected to pin 3 of ALDP112W power relay U40 and one end of resistor R125, the other end of resistor R125 is connected in series with resistors R126, R127, R128, R129, R130, the other end of resistor R130 is connected to capacitor C97, one end of resistor R137, pin 3 of TPA1862-SR dual-channel operational amplifier chip U41A, capacitor C97 , the other end of resistor R137 is connected to capacitor C98, one end of resistor R138 and pin 4 of ALPP112W power relay U42, pin 3 of ALPP112W power relay U42 is connected to resistor R138, the other end of capacitor C98 and GND; pin 1 of ALDP112W power relay U44 is connected to the other end of diode D31, VCC_R, pin 1 of ALDP112W power relay U42 and one end of diode D32; the other end of diode D32 is connected to pin 2 of ALDP112W power relay U42 and collector 3 of transistor Q6, base 1 of transistor Q6 is connected to one end of resistors R146 and R143, the other end of resistor R143 is connected to mcu_isu1_k4, emitter of transistor Q6 is connected to resistor 2, the other end of R146 and CND; TPA1862-SR dual-channel operational amplifier Pins 1 and 2 of the amplifier chip U46 are connected to one end of the resistor R154, and the other end of the resistor R154 is connected to the resistor R148 and the 6th pin of U46. The 7th pin of the TPA1862-SR dual-channel operational amplifier chip U46 is connected to the other end of the resistor R148 and the 5th pin of the TPA1862-SR dual-channel operational amplifier chip U41B. The 8th pin of the TPA1862-SR dual-channel operational amplifier chip U46 is connected to VCCI, and the 5th pin is grounded; Pins 6 and 7 of the TPA1862-SR dual-channel operational amplifier chip U14B are connected to one end of the resistor R163, and the other end of R163 is connected to one end of the resistor R164 and the 3rd pin of the series switching diode U50. The 2nd pin of U50 is connected to 3.3V_MCU, and the 1st pin is grounded; the other end of the resistor R164 is connected to one end of the capacitor C86 and mcu_adc_1#isu-, and the other end of the capacitor C86 is grounded. ; 8. The analog signal acquisition circuit for a new energy vehicle charging pile according to claim 1 is characterized in that Pin 1 of the ADUM1201 digital isolation optocoupler chip U33 in the RS485 communication circuit is connected to one end of capacitor C67 and 3.3V_MCU, the other end of capacitor C67 is grounded, pin 4 of U33 is grounded, pin 5 of the ADUM1201 digital isolation optocoupler chip U33 is connected to CND_C and SN65176BDR. Pin 5 of the RS485 communication protocol chip U32, pin 6 of U33 is connected to pin 4 of U32, pin 7 of U33 is connected to pin 1 of U32, pin 8 of U33 is connected to +5V_C, pin 8 of U32 and HMHA281. Pin 4 of the isolation optocoupler chip U34, +5V_C and one end of capacitors C66 and C65, the other end of C66 and C65 is connected to GND_C, HMHA281 Pin 1 of the isolation optocoupler chip U34 is connected to one end of resistor R105, the other end of resistor R105 is connected to one end of resistor R106 and mcu_uart1_dr, the other end of resistor R106 is grounded, pin 2 of U34 is grounded, pin 3 of U34 is connected to one end of resistor R107 and pins 2 and 3 of the SN65176BDR RS485 communication protocol chip U32, the other end of resistor R107 is connected to CND_C, the SN65176BDR RS485 communication protocol chip U32's pin 7 is connected to one end of resistor R104, one end of diode D17 and one end of FSMD050-1206-R resettable fuse FU6, SN65176BDR RS485 Pin 6 of the communication protocol chip U32 is connected to one end of the resistor R103, one end of the diode D16 and one end of the FSMD050-1206-R resettable fuse FU5. The other ends of the diodes D16 and D17 are connected to CND_C, the other end of the resistor R104 is connected to CND_C, the other end of the resistor R103 is connected to +5V_C, the other end of the FSMD050-1206-R resettable fuse FU5 is connected to the 1 end of the KF1002-02P-R3FLG-ON-02B DIP switch SW2 and the 3rd pin of the 2ERJRC-3.81-3P printed circuit board connector socket J4, the other end of the FSMD050-1206-R resettable fuse FU6 is connected to one end of the resistor R102 and 2ERJRC-3.81-3P Pin 2 of the printed circuit board connector socket J4 and the other end of the resistor R102 are connected to pin 4 of the KF1002-02P-R3FLG-ON-02B DIP switch SW2, and pin 1 of the 2ERJRC-3.81-3P printed circuit board connector socket J4 is connected to CND_C.

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