Double-gun direct current charging pile controller

Abstract

The utility model provides a double-gun direct current charging pile controller, which is characterized in that a power supply processing unit, a control unit, a temperature detection unit, a control guide detection unit, an insulation detection unit, a battery voltage detection unit, an Ethernet communication unit, a 4G communication unit, a CAN communication unit, an RS485 communication unit, an RS232 communication unit and an electromagnetic lock unit are arranged on a control panel; and the system integration and processing difficulty is simplified.

Description

Technical Field

[0001] This utility model relates to the field of DC charging pile technology, and in particular to a dual-gun DC charging pile controller. Background Technology

[0002] With the increasing scarcity of traditional energy sources, the new energy industry has developed rapidly. Electric vehicles, powered by onboard power sources and driven by electric motors, meet all requirements of road traffic and safety regulations. Due to their relatively smaller environmental impact compared to traditional vehicles, their prospects are widely regarded as promising and they also meet the requirements of the new energy strategy. Therefore, they are attracting more and more attention, and governments and enterprises alike are developing related supporting facilities.

[0003] However, the only drawback of electric vehicles is that they need to be charged frequently, and charging piles can effectively solve the problem of charging difficulties. Therefore, charging piles have been included as one of the seven major infrastructure projects, and capital has been invested in the charging pile market. Various standard systems are constantly being improved. Among them, DC charging piles have more advantages in terms of high power, fast charging, centralized management, and commercial operation, and have huge potential. In the face of such a large-scale market, higher requirements have been put forward for the safety and intelligence of DC charging systems. Utility Model Content

[0004] This utility model provides a dual-gun DC charging pile controller, the purpose of which is to improve the safety of the system.

[0005] To achieve the above objectives, this utility model provides a dual-gun DC charging pile controller, comprising: a power processing unit, a control unit, a temperature detection unit, a control guidance detection unit, an insulation detection unit, a battery voltage detection unit, an Ethernet communication unit, a 4G communication unit, a CAN communication unit, an RS485 communication unit, an RS232 communication unit, an electromagnetic lock unit, a first signal input interface, a second signal input interface, and a communication interface, all mounted on a control board.

[0006] The input terminal of the power processing unit is connected to the mains power terminal, and the output terminal of the power processing unit is connected to the power terminals of the control unit, the temperature detection unit, the control guidance detection unit, the insulation detection unit, the battery voltage detection unit, the Ethernet communication unit, the 4G communication unit, the CAN communication unit, the RS485 communication unit, the RS232 communication unit, and the electromagnetic lock unit.

[0007] The input terminals of the temperature detection unit and the control guidance detection unit are both connected to the first signal input interface;

[0008] The input terminals of the battery detection unit, the insulation detection unit, and the electromagnetic lock unit are all connected to the second signal input interface;

[0009] The third data transmission terminal of the CAN communication unit, the first data transmission terminal of the RS485 communication unit, and the second data transmission terminal of the RS232 communication unit are all connected to the communication interface. The second data transmission terminal of the RS485 communication unit is connected to the third data transmission terminal of the RS232 communication unit.

[0010] The output terminals of the temperature detection unit, the control guidance detection unit, the battery detection unit, and the insulation detection unit are all connected to the input terminal of the control unit.

[0011] The first data transmission terminal of the CAN communication unit, the second data transmission terminal of the CAN communication unit, the data transmission terminal of the 4G communication unit, the data transmission terminal of the Ethernet communication unit, the third data transmission terminal of the RS485 communication unit, and the first data transmission terminal of the RS232 communication unit are all connected to the data transmission terminal of the control unit.

[0012] The output of the control unit is connected to the control terminal of the insulation detection unit and the control terminal of the electromagnetic lock unit, respectively.

[0013] The above-mentioned solution of this utility model has the following beneficial effects:

[0014] This invention simplifies system integration and manufacturing by mounting a power processing unit, control unit, temperature detection unit, control guidance detection unit, insulation detection unit, battery voltage detection unit, Ethernet communication unit, 4G communication unit, CAN communication unit, RS485 communication unit, RS232 communication unit, electromagnetic lock unit, first signal input interface, second signal input interface, and communication interface onto a single control board. This improves production efficiency and reduces installation time and costs. Real-time monitoring of the charging process via the temperature detection unit, control guidance detection unit, insulation detection unit, and battery voltage detection unit enhances system safety. Diverse communication methods with the charging cloud platform are achieved through the Ethernet, 4G, CAN, RS485, and RS232 communication units. Automatic unlocking upon power failure via the electromagnetic lock unit further enhances system safety.

[0015] Other beneficial effects of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] Figure 1 This is a schematic block diagram of an embodiment of the present utility model;

[0017] Figure 2This is a circuit diagram of the temperature detection unit in an embodiment of the present invention;

[0018] Figure 3 This is a circuit diagram of the control and guidance detection unit in an embodiment of the present invention;

[0019] Figure 4 This is a circuit diagram of the insulation detection circuit in an embodiment of the present invention;

[0020] Figure 5 This is a circuit diagram of the battery detection circuit in an embodiment of the present invention;

[0021] Figure 6 This is a circuit diagram of the electromagnetic lock circuit in an embodiment of this utility model;

[0022] Figure 7 This is a circuit diagram of the current detection circuit in an embodiment of this utility model. Detailed Implementation

[0023] To make the technical problems, solutions, and advantages of this utility model clearer, a detailed description will be provided below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] like Figure 1 As shown, an embodiment of this utility model provides a dual-gun DC charging pile controller, including: a power processing unit, a control unit, a temperature detection unit, a control guidance detection unit, an insulation detection unit, a battery voltage detection unit, an Ethernet communication unit, a 4G communication unit, a CAN communication unit, an RS485 communication unit, an RS232 communication unit, an electromagnetic lock unit, a first signal input interface, a second signal input interface, and a communication interface, all mounted on a control board.

[0026] The input terminal of the power processing unit is connected to the mains power terminal, and the output terminal of the power processing unit is connected to the power terminals of the control unit, the temperature detection unit, the control guidance detection unit, the insulation detection unit, the battery voltage detection unit, the Ethernet communication unit, the 4G communication unit, the CAN communication unit, the RS485 communication unit, the RS232 communication unit, and the electromagnetic lock unit.

[0027] The input terminals of the temperature detection unit and the control guidance detection unit are both connected to the first signal input interface;

[0028] The input terminals of the battery detection unit, the insulation detection unit, and the electromagnetic lock unit are all connected to the second signal input interface;

[0029] The third data transmission terminal of the CAN communication unit, the first data transmission terminal of the RS485 communication unit, and the second data transmission terminal of the RS232 communication unit are all connected to the communication interface. The second data transmission terminal of the RS485 communication unit is connected to the third data transmission terminal of the RS232 communication unit.

[0030] The output terminals of the temperature detection unit, the control guidance detection unit, the battery detection unit, and the insulation detection unit are all connected to the input terminal of the control unit.

[0031] The first data transmission terminal of the CAN communication unit, the second data transmission terminal of the CAN communication unit, the data transmission terminal of the 4G communication unit, the data transmission terminal of the Ethernet communication unit, the third data transmission terminal of the RS485 communication unit, and the first data transmission terminal of the RS232 communication unit are all connected to the data transmission terminal of the control unit.

[0032] The output of the control unit is connected to the control terminal of the insulation detection unit and the control terminal of the electromagnetic lock unit, respectively.

[0033] The working principle of this utility model embodiment is as follows:

[0034] The control unit sends a command to the control guidance and detection unit to detect the charging gun connection status. The control guidance and detection unit sends a status feedback signal to the control unit. The control unit issues a charging command based on the status feedback signal. The insulation detection unit sends the insulation resistance value on the charging bus to the control unit. The temperature detection unit sends the temperature value of the charging gun to the control unit. The battery voltage detection unit sends the actual voltage value of the battery to the control unit. The electromagnetic lock unit controls the locking and unlocking of the charging gun according to the control signal sent by the control unit. The control unit communicates with the charging cloud platform via the Ethernet communication unit, 4G communication unit, CAN communication unit, RS485 communication unit, and RS232 communication unit to upload charging parameters or receive commands issued by the platform. The control unit determines that the charging gun can charge normally based on the actual voltage value, temperature value, and resistance value.

[0035] In this embodiment of the utility model, the control unit, as the core part of the dual-gun DC charging pile controller, is used to determine whether the equipment can work normally based on the actual parameter values. This is a function of the control unit. This embodiment of the utility model does not involve any improvement to its internal software and algorithm.

[0036] The optimal choice is, such as Figure 2 As shown, the temperature detection unit is used to detect the temperature of the charging gun and protect the charging gun interface from damage due to high temperature. It includes:

[0037] Resistor R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26... Resistor R26, resistor R27, resistor R28, resistor R29, resistor R30, resistor R31, resistor R32, resistor R33, resistor R34, resistor R35, resistor R36, resistor R37, resistor R38, resistor R39, resistor R40, resistor R41, resistor R42, resistor R43, resistor R44, resistor R45, resistor R46, resistor R47;

[0038] First capacitor C1, second capacitor C2, third capacitor C3, fourth capacitor C4, fifth capacitor C5, sixth capacitor C6, seventh capacitor C7, eighth capacitor C8, ninth capacitor C9, tenth capacitor C10, eleventh capacitor C11, twelfth capacitor C12, thirteenth capacitor C13, fourteenth capacitor C14, fifteenth capacitor C15, sixteenth capacitor C16, seventeenth capacitor C17, eighteenth capacitor C18, nineteenth capacitor C19, twentieth capacitor C20, twenty-first capacitor C21, twenty-second capacitor C22, twenty-third capacitor C23, twenty-fourth capacitor C24, twenty-fifth capacitor C25, twenty-sixth capacitor C26, twenty-seventh capacitor C27, twenty-eighth capacitor C28, twenty-ninth capacitor C29, thirtieth capacitor C30;

[0039] Diodes D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, and TVS1 (first Zener diode).

[0040] First operational amplifier U1, second operational amplifier U2, third operational amplifier U3, fourth operational amplifier U4, fifth operational amplifier U5, sixth operational amplifier U6, and seventh operational amplifier U7;

[0041] The first terminal of the first resistor R1 and the first terminal of the first capacitor C1 are both connected to the output terminal of the power processing unit. The second terminal of the first resistor R1 is connected to the first terminal of the first Zener diode TVS1, the second terminal of the first Zener diode TVS1, the first terminal of the second capacitor C2, the first terminal of the third capacitor C3, the first terminal of the second resistor R2, and the third pin of the first operational amplifier U1. The second terminal of the first capacitor C1 is connected to the third terminal of the first Zener diode TVS1, the second terminal of the second capacitor C2, and the second terminal of the third capacitor C3, and grounded. The second terminal of the second resistor R2 is connected to the first terminal of the third resistor R3 and the fifth pin of the first operational amplifier U1, and the second terminal of the third resistor R3 is grounded. The sixth pin of the first operational amplifier U1 is connected to the seventh pin of the first operational amplifier U1, the first terminal of the eighth resistor R8, the first terminal of the eighteenth resistor R18, the first terminal of the twenty-eighth resistor R28, and the first terminal of the thirty-eighth resistor R38. The second pin of the first operational amplifier U1 is connected to the first pin of the first operational amplifier U1 and the first terminal of the fourth resistor R4. The first terminal of the fifth resistor R5, the first terminal of the sixth resistor R6, and the first terminal of the seventh resistor R7 are connected to the first terminal of the fourth resistor R4, the first signal input interface, and the first terminal of the thirty-ninth resistor R39, respectively. The second terminal of the fifth resistor R5 is connected to the first terminal of the third diode D3, the first signal input interface, and the first terminal of the twenty-ninth resistor R29, respectively. The second terminal of the sixth resistor R6 is connected to the first terminal of the second diode D2, the first signal input interface, and the first terminal of the nineteenth resistor R19, respectively. The second terminal of the seventh resistor R7 is connected to the first terminal of the first diode D1, the first signal input interface, and the first terminal of the ninth resistor R9, respectively. The second terminals of the fourth diode D4, the third diode D3, the second diode D2, and the first diode D1 are all grounded. The eighth pin of the first operational amplifier U1 is connected to the first terminal of the fourth resistor R4, the first terminal of the fifth resistor R5, and the output terminal of the power processing unit, respectively. The second terminal of the fourth resistor R4 is connected to the second terminal of the fifth resistor R5 and grounded.

[0042] The second end of the eighth resistor R8 is connected to the first end of the sixth capacitor C6 and the fifth pin of the second operational amplifier U2. The sixth pin of the second operational amplifier U2 is connected to the second end of the eleventh resistor R11 and the first end of the twelfth resistor R12. The first end of the eleventh resistor R11 is connected to the seventh pin of the second operational amplifier U2 and the first end of the tenth resistor R10. The second end of the tenth resistor R10 is connected to the sixth pin of the fourth operational amplifier U4 and the first end of the fifteenth resistor R15. The second end of the fifteenth resistor R15 is connected to the seventh pin of the fourth operational amplifier U4 and the first end of the seventeenth resistor R17. The second end of the seventeenth resistor R17 is connected to the anode of the fifth diode D5, the cathode of the sixth diode D6, the first end of the tenth capacitor C10, the first end of the eleventh capacitor C11, and the input terminal of the controller. The second end of the tenth capacitor C10 and the second end of the eleventh capacitor C11 are connected and grounded. The cathode of the fifth diode D5 and the second end of the sixth capacitor C6 are both grounded. The anode of the sixth diode D6 is connected to the output terminal of the power processing unit.

[0043] The second terminal of the ninth resistor R9 is connected to the first terminal of the seventh capacitor C7 and the third pin of the second operational amplifier U2. The second pin of the second operational amplifier U2 is connected to the second terminal of the twelfth resistor R12 and the first terminal of the thirteenth resistor R13. The second terminal of the thirteenth resistor R13 is connected to the first pin of the second operational amplifier U2 and the first terminal of the fourteenth resistor R14. The second terminal of the fourteenth resistor R14 is connected to the fifth pin of the fourth operational amplifier U4 and the first terminal of the sixteenth resistor R16. The eighth pin of the second operational amplifier U2 is connected to the first terminal of the eighth capacitor C8, the first terminal of the ninth capacitor C9, and the output terminal of the power processing unit. The second terminal of the eighth capacitor C8 and the second terminal of the ninth capacitor C9 are connected and grounded. The second terminals of the seventh capacitor C7 and the sixteenth resistor R16 are both grounded.

[0044] The second terminal of the eighteenth resistor R18 is connected to the first terminal of the twelfth capacitor C12 and the fifth pin of the third operational amplifier U3. The sixth pin of the third operational amplifier U3 is connected to the second terminal of the twenty-first resistor R21 and the first terminal of the twenty-second resistor R22. The first terminal of the twenty-first resistor R21 is connected to the seventh pin of the third operational amplifier U3 and the first terminal of the twentieth resistor R20. The second terminal of the twentieth resistor R20 is connected to the first terminal of the twenty-fifth resistor R25 and the second pin of the fourth operational amplifier U4. The second terminal of the twenty-fifth resistor R25 is connected to the first pin of the fourth operational amplifier U4. The first end of the 27th resistor R27 is connected to the anode of the 7th diode D7, the cathode of the 8th diode D8, the first end of the 16th capacitor C16, the first end of the 17th capacitor C17, and the input terminal of the control unit. The second end of the 16th capacitor C16 is connected to the second end of the 17th capacitor C17 and grounded. The eighth pin of the fourth operational amplifier U4 is connected to the first end of the 15th capacitor C15. The second end of the 12th resistor R12, the second end of the 15th capacitor C15, and the cathode of the 7th diode D7 are all grounded. The anode of the 8th diode D8 is connected to the output terminal of the power processing unit.

[0045] The second terminal of the nineteenth resistor R19 is connected to the first terminal of the thirteenth capacitor C13 and the third pin of the third operational amplifier U3. The second pin of the third operational amplifier U3 is connected to the second terminal of the twenty-second resistor R22 and the first terminal of the twenty-third resistor R23. The second terminal of the twenty-third resistor R23 is connected to the first pin of the third operational amplifier U3 and the first terminal of the twenty-fourth resistor R24. The second terminal of the twenty-fourth resistor R24 ​​is connected to the third pin of the fourth operational amplifier U4 and the first terminal of the twenty-sixth resistor R26. The eighth pin of the third operational amplifier U3 is connected to the first terminal of the fourteenth capacitor C14 and the output terminal of the power processing unit. The second terminals of the fourteenth capacitor C14, the thirteenth capacitor C13, and the twenty-sixth resistor R26 are all grounded.

[0046] The second terminal of the 28th resistor R28 is connected to the first terminal of the 18th capacitor C8 and the fifth pin of the fifth operational amplifier U5. The sixth pin of the fifth operational amplifier U5 is connected to the second terminal of the 31st resistor R31 and the first terminal of the 32nd resistor R32. The first terminal of the 31st resistor R31 is connected to the seventh pin of the fifth operational amplifier U5 and the first terminal of the 30th resistor R30. The second terminal of the 30th resistor R30 is connected to the sixth pin of the seventh operational amplifier U7 and the first terminal of the 35th resistor R35. The second terminal of the 35th resistor R35 is connected to the seventh pin of the seventh operational amplifier U7 and the first terminal of the 37th resistor R37. The second terminal of the 37th resistor R37 is connected to the anode of the 9th diode D9, the cathode of the 10th diode D10, the first terminal of the 22nd capacitor C22, the first terminal of the 23rd capacitor C23, and the input terminal of the control unit. The cathode of the 9th diode D9 and the second terminal of the 18th capacitor C8 are both grounded. The anode of the 10th diode D10 is connected to the output terminal of the power processing unit. The second terminal of the 22nd capacitor C22 and the second terminal of the 23rd capacitor C23 are connected and grounded.

[0047] The second terminal of the 29th resistor R29 is connected to the first terminal of the 19th capacitor C19 and the third pin of the fifth operational amplifier U5. The second pin of the fifth operational amplifier U5 is connected to the second terminal of the 32nd resistor R32 and the first terminal of the 33rd resistor R33. The second terminal of the 33rd resistor R33 is connected to the first pin of the fifth operational amplifier U5 and the first terminal of the 34th resistor R34. The second terminal of the 34th resistor R34 is connected to the fifth pin of the seventh operational amplifier U7 and the first terminal of the 36th resistor R36. The eighth pin of the fifth operational amplifier U5 is connected to the first terminal of the 20th capacitor C20, the first terminal of the 21st capacitor C21, and the output terminal of the power processing unit. The second terminal of the 20th capacitor C20 and the second terminal of the 21st capacitor C21 are connected and grounded. The second terminals of the 19th capacitor C19 and the 36th resistor R36 are both grounded.

[0048] The second terminal of the thirty-eighth resistor R38 is connected to the first terminal of the twenty-fourth capacitor C24 and the fifth pin of the sixth operational amplifier U6. The sixth pin of the sixth operational amplifier U6 is connected to the second terminal of the forty-first resistor R41 and the first terminal of the forty-second resistor R42. The first terminal of the forty-first resistor R41 is connected to the seventh pin of the sixth operational amplifier U6 and the first terminal of the fortieth resistor R40. The second terminal of the fortieth resistor R40 is connected to the second pin of the seventh operational amplifier U7 and the first terminal of the forty-fifth resistor R45. The second terminal of the forty-fifth resistor R45 is connected to the first pin of the seventh operational amplifier U7 and the first terminal of the forty-seventh resistor R47. The second terminal of the forty-seventh resistor R47... The first terminal of the eleventh diode D11, the cathode of the twelfth diode D12, the first terminal of the twenty-ninth capacitor C29, the first terminal of the thirtieth capacitor C30, and the input terminal of the control unit are connected respectively. The cathode of the eleventh diode D11 and the second terminal of the twenty-fourth capacitor C24 are both grounded. The anode of the twelfth diode D12 is connected to the output terminal of the power processing unit. The second terminal of the twenty-ninth capacitor C29 and the second terminal of the thirtieth capacitor C30 are connected and grounded. The eighth pin of the seventh operational amplifier U7 is connected to the first terminal of the twenty-seventh capacitor C27, the first terminal of the twenty-eighth capacitor C28, and the output terminal of the power processing unit. The second terminal of the twenty-seventh capacitor C27 and the second terminal of the twenty-eighth capacitor C28 are connected and grounded.

[0049] The second terminal of the thirty-ninth resistor R39 is connected to the first terminal of the twenty-fifth capacitor C25 and the third pin of the sixth operational amplifier U6. The second pin of the sixth operational amplifier U6 is connected to the second terminal of the forty-second resistor R42 and the first terminal of the forty-third resistor R43. The second terminal of the forty-third resistor R43 is connected to the first pin of the sixth operational amplifier U6 and the first terminal of the forty-fourth resistor R44. The second terminal of the forty-fourth resistor R44 is connected to the third pin of the seventh operational amplifier U7 and the first terminal of the forty-sixth resistor R46. The eighth pin of the sixth operational amplifier U6 is connected to the first terminal of the twenty-sixth capacitor C26 and the output terminal of the power processing unit. The second terminals of the forty-sixth resistor R46, the twenty-fifth capacitor C25, and the twenty-sixth capacitor C26 are all grounded.

[0050] The optimal choice is, such as Figure 3 As shown, the control guidance detection unit is used to detect the connection status of the charging gun, so that the control unit can execute the corresponding charging command based on the connection status of the charging gun, including:

[0051] Resistor R48 (48th), R49 (49th), R50 (50th), R51 (51st), R52 (52nd), R53 (53rd), R54 (54th), R55 (55th), R56 (56th), R57 (57th), R58 (58th), R59 (59th), R60 (60th), R61 (61st), R62 (62nd), R63 (63rd), R64 (64th), R65 (65th), R66 (66th), R67 (67th), R68 (68th), R69 (69th);

[0052] Capacitors C13 (13th), C14 (14th), C15 (15th), C16 (16th), C17 (17th), C8 (18th), C19 (19th), C20 (20th), C21 (21st), C22 (22nd), C23 (23rd), C24 (24th), C25 (25th), C26 (26th), C27 (27th), C28 (28th), C29 (29th), C30 (30th), and C31 (31st).

[0053] Diodes D13 (13th), D14 (14th), D15 (15th), D16 (16th), D17 (17th), D18 (18th), D19 (19th), and D20 (20th);

[0054] Eighth operational amplifier U8, ninth operational amplifier U9, tenth operational amplifier U10, first isolation amplifier, second isolation amplifier;

[0055] The first terminal of resistor R48 (forty-eighth resistor) and resistor R59 (fifty-ninth resistor) are both connected to the output terminal of the power processing unit.

[0056] The second terminal of the forty-eighth resistor R48 is connected to the first signal input interface, the first terminal of the thirteenth diode D13, and the first terminal of the forty-ninth resistor R49. The second terminal of the forty-ninth resistor R49 is connected to the first terminal of the fiftieth resistor R50. The second terminal of the fiftieth resistor R50 is connected to the first terminal of the fifty-first resistor R51 and the first terminal of the fifty-second resistor R52. The second terminal of the fifty-first resistor R51 is connected to the first terminal of the thirteenth capacitor C13 and the third pin of the eighth operational amplifier U8. The second terminal of the thirteenth diode D13 is connected to the second terminal of the fifty-second resistor R52 and the second terminal of the thirteenth capacitor C13 and grounded.

[0057] The fourth pin of the eighth operational amplifier U8 is connected to the first pin of the eighth operational amplifier U8 and the first end of the fifty-third resistor R53. The second end of the fifty-third resistor R53 is connected to the anode of the fourteenth diode D14, the first end of the sixteenth capacitor C16, and the second pin of the first isolation amplifier. The cathode of the fourteenth diode D14 is connected to the second end of the sixteenth capacitor C16, the third pin of the first isolation amplifier, and the fourth pin of the first isolation amplifier and grounded.

[0058] The fifth pin of the eighth operational amplifier U8 is connected to the output terminal of the power supply unit and the first terminal of the fourteenth capacitor C14, respectively, and the second terminal of the fourteenth capacitor C14 is grounded.

[0059] The first pin of the first isolation amplifier is connected to the first terminal of the fifteenth capacitor C15 and the output terminal of the power supply processing unit, respectively, and the second terminal of the fifteenth capacitor C15 is grounded.

[0060] The eighth pin of the first isolation amplifier is connected to the first terminal of the seventeenth capacitor C17 and the output terminal of the power processing unit, respectively, and the second terminal of the seventeenth capacitor C17 is grounded.

[0061] The seventh pin of the first isolation amplifier is connected to the first end of the fifty-fourth resistor R54. The second end of the fifty-fourth resistor R54 is connected to the fifth pin of the tenth operational amplifier U10, the first end of the fifty-sixth resistor R56, and the first end of the eighteenth capacitor C8. The second end of the fifty-sixth resistor R56 is connected to the second end of the eighteenth capacitor C8 and the anode of the fifteenth diode D15 and grounded.

[0062] The sixth pin of the first isolation amplifier is connected to the first end of the fifty-fifth resistor R55. The second end of the fifty-fifth resistor R55 is connected to the sixth pin of the tenth operational amplifier U10, the first end of the fifty-seventh resistor R57, and the first end of the nineteenth capacitor C19C9. The second end of the nineteenth capacitor C19C9 is connected to the second end of the fifty-seventh resistor R57, the seventh pin of the tenth operational amplifier U10, and the first end of the fifty-eighth resistor R58. The second end of the fifty-eighth resistor R58 is connected to the first end of the twentieth capacitor C20, the first end of the twenty-first capacitor C21, the cathode of the fifteenth diode D15, the anode of the sixteenth diode D16, and the input terminal of the control unit. The cathode of the sixteenth diode D16 is connected to the output terminal of the power processing unit. The second end of the twentieth capacitor C20 is connected to the second end of the twenty-first capacitor C21 and grounded.

[0063] The second terminal of the fifty-ninth resistor R59 is connected to the first signal input interface, the first terminal of the seventeenth diode D17, and the first terminal of the sixtieth resistor R60. The second terminal of the sixtieth resistor R60 is connected to the first terminal of the sixty-first resistor R61. The second terminal of the sixty-first resistor R61 is connected to the first terminal of the sixty-second resistor R62 and the first terminal of the sixty-third resistor R63. The second terminal of the sixty-second resistor R62 is connected to the first terminal of the twenty-second capacitor C22 and the third pin of the ninth operational amplifier U9. The second terminal of the seventeenth diode D17 is connected to the second terminal of the sixty-third resistor R63 and the second terminal of the twenty-second capacitor C22.

[0064] The fourth pin of the ninth operational amplifier U9 is connected to the first pin of the ninth operational amplifier U9 and the first end of the sixty-fourth resistor R64. The second end of the sixty-fourth resistor R64 is connected to the cathode of the eighteenth diode D18, the first end of the twenty-fifth capacitor C25, and the second pin of the second isolation amplifier. The anode of the eighteenth diode D18 is connected to the second end of the twenty-fifth capacitor C25, the third pin of the second isolation amplifier, and the fourth pin of the second isolation amplifier and grounded.

[0065] The fifth pin of the ninth operational amplifier U9 is connected to the output terminal of the power supply unit and the first terminal of the twenty-third capacitor C23, while the second terminal of the twentieth capacitor C20 is grounded.

[0066] The first pin of the second isolation amplifier is connected to the output terminal of the power processing chip and the first terminal of the twenty-fourth capacitor C24, respectively, and the second terminal of the twenty-fourth capacitor C24 is grounded.

[0067] The eighth pin of the second isolation amplifier is connected to the output of the power processing unit and the first terminal of the twenty-sixth capacitor C26, respectively, and the second terminal of the twenty-sixth capacitor C26 is grounded.

[0068] The seventh pin of the second isolation amplifier is connected to the first end of the sixty-fifth resistor R65. The second end of the sixty-fifth resistor R65 is connected to the third pin of the tenth operational amplifier U10, the first end of the sixty-seventh resistor R67, and the first end of the twenty-seventh capacitor C27. The second end of the sixty-seventh resistor R67 is connected to the second end of the twenty-seventh capacitor C27, the second end of the twenty-eighth capacitor C28, and the anode of the nineteenth diode D19 and grounded. The first end of the twenty-eighth capacitor is connected to the eighth pin of the tenth operational amplifier U10 and the output terminal of the power processing unit.

[0069] The sixth pin of the second isolation amplifier is connected to the first end of the sixty-sixth resistor R66. The second end of the sixty-sixth resistor R66 is connected to the second pin of the tenth operational amplifier U10, the first end of the sixty-eighth resistor R68, and the first end of the twenty-ninth capacitor C29. The second end of the twenty-ninth capacitor C29 is connected to the second end of the sixty-eighth resistor R68, the first pin of the tenth operational amplifier U10, and the first end of the sixty-ninth resistor R69. The second end of the sixty-ninth resistor R69 is connected to the first end of the thirtieth capacitor C30, the first end of the thirty-first capacitor C31, the cathode of the nineteenth diode D19, the anode of the twentieth diode D20, and the input terminal of the control unit. The cathode of the twentieth diode D20 is connected to the output terminal of the power processing unit. The second end of the thirtieth capacitor C30 is connected to the second end of the thirty-first capacitor C31 and grounded.

[0070] Preferably, the insulation detection unit consists of two sets of insulation detection circuits, used to detect the insulation resistance value on the charging bus. Each set of insulation detection circuits corresponds to one charging gun. Figure 4 As shown, each insulation detection circuit includes:

[0071] The components are: a first relay (model HF49FD / 005-1H11), a first optocoupler (OP1), a second optocoupler (OP2), a second Zener diode (TVS2), a first transistor (Q1), a second transistor (Q2), a third transistor (Q3), an eleventh operational amplifier (U11), a twelfth operational amplifier (U12), a third isolation amplifier, and a fourth isolation amplifier.

[0072] Resistor R70 (70th), R71 (71st), R72 (72nd), R73 (73rd), R74 (74th), R75 (75th), R76 (76th), R77 (77th), R78 (78th), R79 (79th), R80 (80th), R81 (81st), R82 (82nd), R83 (83rd), R84 (84th), R85 (85th), R86 (86th), R87 (87th), R88 (88th), R89 (89th), R90 (90th), R91 (91st), R92 (92nd), R93 (93rd), R94 (94th), R95 (95th), R96 (96th), R97 (97th), R98 (98th), R99 (99th), R100 (100th), 100th Resistor R101 (101), R102 (102), R103 (103), R104 (104), R105 (105), R106 (106), R107 (107), R108 (108), R109 (109), R110 (110), R111 (111), R112 (112), R113 (113) Resistor R114, R115, R116, R117, R118, R119, R120, R121, R122, R123, R124, R125;

[0073] Capacitors C32 (32nd), C33 (33rd), C34 (34th), C35 (35th), C36 (36th), C37 (37th), C38 (38th), C39 (39th), C40 (40th), C41 (41st), C42 (42nd), C43 (43rd), C44 (44th), C45 (45th), C46 (46th), C47 (47th), C48 (48th), C49 (49th), C50 (50th), C51 (51st), C52 (52nd), C53 (53rd), C54 (54th), C55 (55th), C56 (56th), C57 (57th), and C58 (58th);

[0074] Diodes D21 (21st), D22 (22nd), D23 (23rd), D24 (24th), D25 (25th), D26 (26th), and D27 (27th);

[0075] The first end of the 70th resistor R70 is connected to the output terminal of the control unit. The second end of the 70th resistor R70 is connected to the first end of the 71st resistor R71 and the base of the first transistor Q1. The second end of the 71st resistor R71 is connected to the emitter of the first transistor Q1 and grounded. The collector of the first transistor Q1 is connected to the anode of the 21st diode D21 and the second pin of the first relay. The cathode of the 21st diode D21 is connected to the first pin of the first relay and the output terminal of the power processing unit.

[0076] The 72nd resistor R72 is connected in sequence with the 73rd resistor R73, the 74th resistor R74, the 75th resistor R75, and the 76th resistor R76. The 77th resistor R77 is connected in sequence with the 78th resistor R78, the 79th resistor R79, the 80th resistor R80, the 81st resistor R81, and the 82nd resistor R82. The first end of the 72nd resistor R72 is connected to the first end of the 77th resistor R77 and the second signal input interface. The second end of the 82nd resistor R82 is connected to the eighth pin of the first optocoupler OP1.

[0077] The first pin of the first optocoupler OP1 is connected to the second end of the eighty-third resistor R83, and the first end of the eighty-third resistor R83 is connected to the output end of the power processing unit.

[0078] The fourth pin of the first optocoupler OP1 is connected to the collector of the second transistor Q2. The base of the second transistor Q2 is connected to the first end of the eighty-fourth resistor R84 and the first end of the eighty-fifth resistor R85. The second end of the eighty-fourth resistor R84 is connected to the input terminal of the control unit. The second end of the eighty-fifth resistor R85 is connected to the emitter of the second transistor Q2 and grounded.

[0079] The fifth pin of the first optocoupler OP1 is connected to the second terminal of the eighty-seventh resistor R87, the eighth pin of the second optocoupler OP2, and the first terminal of the one hundred and twelfth resistor R112, and grounded.

[0080] The first terminal of the 87th resistor R87 is connected to the second terminal of the 76th resistor R76 and the first terminal of the 86th resistor R86. The second terminal of the 86th resistor R86 is connected to the first terminal of the 32nd capacitor C32 and the first terminal of the 88th resistor R88. The second terminal of the 88th resistor R88 is connected to the fifth pin of the 11th operational amplifier U11 and the first terminal of the 89th resistor R89. The second terminal of the 89th resistor R89 ​​is grounded. The second terminal of the 32nd capacitor C32 is connected to the first terminal of the 33rd capacitor C33 and grounded.

[0081] The sixth pin of the eleventh operational amplifier U11 is connected to the first terminal of the ninetieth resistor R90 and the first terminal of the ninety-first resistor R91. The second terminal of the ninetieth resistor R90 is grounded. The second terminal of the ninety-first resistor R91 is connected to the seventh pin of the eleventh operational amplifier U11 and the first terminal of the ninety-second resistor R92. The second terminal of the ninety-second resistor R92 is connected to the cathode of the twenty-second diode D22, the first terminal of the thirty-fourth capacitor C34, and the second pin of the third isolation amplifier. The anode of the twenty-second diode D22 is connected to the second terminal of the thirty-fourth capacitor C34, the third pin of the third isolation amplifier, and the fourth pin of the third isolation amplifier, and grounded.

[0082] The first pin of the third isolation amplifier is connected to the first terminal of the thirty-fifth capacitor C35 and the output terminal of the power processing unit, respectively, and the second terminal of the thirty-fifth capacitor C35 is grounded.

[0083] The eighth pin of the third isolation amplifier is connected to the first terminal of the thirty-sixth capacitor C36 and the output terminal of the power supply unit, respectively, and the second terminal of the thirty-sixth capacitor C36 is grounded.

[0084] The seventh pin of the third isolation amplifier is connected to the first end of the ninety-third resistor R93. The second end of the ninety-third resistor R93 is connected to the first end of the thirty-seventh capacitor C37, the first end of the thirty-eighth capacitor C38, the first end of the ninety-fifth resistor R95, and the fifth pin of the twelfth operational amplifier U12. The second end of the ninety-fifth resistor R95 is connected to the second end of the thirty-seventh capacitor C37, the second end of the thirty-eighth capacitor C38, the first end of the one hundred and twenty-fourth resistor R124, and the first end of the one hundred and twenty-fifth resistor R125.

[0085] The sixth pin of the third isolation amplifier is connected to the first end of the ninety-fourth resistor R94. The second end of the ninety-fourth resistor R94 is connected to the sixth pin of the twelfth operational amplifier U12, the first end of the ninety-sixth resistor R96, the first end of the thirty-ninth capacitor C39, and the first end of the fortieth capacitor C40. The second end of the fortieth capacitor C40 is connected to the second end of the thirty-ninth capacitor C39, the second end of the ninety-sixth resistor R96, the seventh pin of the twelfth operational amplifier U12, and the first end of the ninety-seventh resistor R97. The second end of the ninety-seventh resistor R97 is connected to the first end of the forty-first capacitor C41, the cathode of the twenty-third diode D23, the anode of the twenty-fourth diode D24, the first end of the forty-second capacitor C42, and the input terminal of the control unit. The anode of the twenty-third diode D23 is grounded. The cathode of the twenty-fourth diode D24 is connected to the output terminal of the power processing unit. The second end of the forty-first capacitor C41 is connected to the second end of the forty-second capacitor C42 and grounded.

[0086] The first pin of the second optocoupler OP2 is connected to the second end of the ninety-ninth resistor R99, and the first end of the ninety-ninth resistor R99 is connected to the output end of the power processing unit.

[0087] The fourth pin of the second optocoupler OP2 is connected to the collector of the third transistor Q3. The base of the third transistor Q3 is connected to the first end of the ninety-eighth resistor R98 and the first end of the one hundredth resistor R100. The second end of the ninety-eighth resistor R98 is connected to the input terminal of the control unit. The second end of the one hundredth resistor R100 is connected to the emitter of the third transistor Q3 and grounded.

[0088] The fifth pin of the second optocoupler OP2 is connected to the first end of the first 101 resistor R101. The first 101 resistor R101 is connected in sequence to the first 102 resistor R102, the first 103 resistor R103, the first 104 resistor R104, the first 105 resistor R105, and the first 106 resistor R106. The second end of the first 106 resistor R106 is connected to the first end of the first 107 resistor R107 and the second signal input interface.

[0089] Resistor 107 is connected in sequence with resistor 108, resistor 109, resistor R109, resistor 110, resistor R110, and resistor R111.

[0090] The 111th resistor R111 is connected to the second terminal of the 112th resistor R112 and the first terminal of the 113th resistor R113. The second terminal of the 113th resistor R113 is connected to the second terminal of the 33rd capacitor C33 and the first terminal of the 115th resistor R115. The second terminal of the 115th resistor R115 is connected to the second pin of the 11th operational amplifier U11 and the first terminal of the 116th resistor R116. The second terminal of the 116th resistor R116 is connected to the first pin of the 11th operational amplifier U11 and the first terminal of the 117th resistor R117. The second terminal of the 117th resistor R117 is connected to the cathode of the 25th diode D25, the first terminal of the 45th capacitor C45, and the second pin of the 4th isolation amplifier. The anode of the 25th diode D25 is connected to the second terminal of the 45th capacitor C45, the third pin of the 4th isolation amplifier, and the fourth pin of the 4th isolation amplifier and grounded.

[0091] The third pin of the eleventh operational amplifier U11 is connected to the first end of the one hundred and fourteenth resistor R114, and the second end of the one hundred and fourteenth resistor R114 is grounded.

[0092] The fourth pin of the eleventh operational amplifier U11 is connected to the output terminal of the power processing chip and the first terminal of the forty-fourth capacitor C44, while the second terminal of the forty-fourth capacitor C44 is grounded.

[0093] The eighth pin of the eleventh operational amplifier U11 is connected to the output terminal of the power processing chip and the first terminal of the forty-third capacitor C43, while the second terminal of the forty-third capacitor C43 is grounded.

[0094] The first pin of the fourth isolation amplifier is connected to the first terminal of the forty-sixth capacitor C46 and the output terminal of the power processing unit, respectively, and the second terminal of the forty-sixth capacitor C46 is grounded.

[0095] The eighth pin of the fourth isolation amplifier is connected to the first terminal of the forty-seventh capacitor C47 and the output terminal of the power supply processing unit, respectively, and the second terminal of the forty-seventh capacitor C47 is grounded.

[0096] The seventh pin of the fourth isolation amplifier is connected to the first end of the 118th resistor R118. The second end of the 118th resistor R118 is connected to the first end of the 120th resistor R120, the first end of the 48th capacitor C48, the first end of the 49th capacitor C49, and the third pin of the 12th operational amplifier U12. The second end of the 120th resistor R120 is connected to the second end of the 48th capacitor C48, the second end of the 49th resistor R49, and the output terminal of the power processing unit.

[0097] The sixth pin of the fourth isolation amplifier is connected to the first end of the 119th resistor R119. The second end of the 119th resistor R119 is connected to the second pin of the 12th operational amplifier U12, the first end of the 121st resistor R121, the first end of the 51st capacitor C51, and the first end of the 52nd capacitor C52. The second end of the 52nd capacitor C52 is connected to the second end of the 51st capacitor C51, the second end of the 121st resistor R121, the first pin of the 12th operational amplifier U12, and the first end of the 122nd resistor R122. The second end of the 122nd resistor R122 is connected to the first end of the 53rd capacitor C53, the cathode of the 26th diode D26, the anode of the 27th diode D27, the first end of the 54th capacitor C54, and the input terminal of the control unit. The cathode of the 27th diode D27 is connected to the output terminal of the power processing unit.

[0098] The fourth pin of the twelfth operational amplifier U12 is connected to the second terminal of the fifty-third capacitor C53 and the second terminal of the fifty-fourth capacitor C54, respectively, and grounded.

[0099] The eighth pin of the twelfth operational amplifier U12 is connected to the output terminal of the power supply unit and the first terminal of the fiftieth capacitor C50, respectively. The second terminal of the fiftieth capacitor C50 is connected to the anode of the twenty-sixth diode D26 and grounded.

[0100] The second terminal of resistor R124 is connected to the first terminal of capacitor C58, capacitor C57, the second terminal of Zener diode TVS2, and the first terminal of resistor R123. The second terminal of resistor R123 is connected to the output terminal of the power processing unit, capacitor C56, and capacitor C55. The second terminal of capacitor C55 is connected to the second terminal of capacitor C56, the third terminal of Zener diode TVS2, capacitor C57, and capacitor C58 and grounded. The second terminal of resistor R125 is grounded.

[0101] Preferably, the battery detection unit consists of two sets of battery detection circuits. The battery detection unit detects the actual voltage of the battery to facilitate the configuration of the appropriate charging voltage, such as... Figure 5 As shown, each battery detection circuit includes:

[0102] Fifth isolation amplifier, thirteenth operational amplifier U13, fourteenth operational amplifier U14, third Zener diode, twenty-eighth diode D28, twenty-ninth diode D29, thirtieth diode D30;

[0103] Resistors R126, R127, R128, R129, R130, R131, R132, R133, R134, R135, R136, R137, R138, R139, R139, R140, R141, R142, R143, R144, R145, R146, R147;

[0104] Capacitor C59 (59th), Capacitor C60 (60th), Capacitor C61 (61st), Capacitor C62 (62nd), Capacitor C63 (63rd), Capacitor C64 (64th), Capacitor C65 (65th), Capacitor C66 (66th), Capacitor C67 (67th), Capacitor C68 (68th), Capacitor C69 (69th), Capacitor C70 (70th), Capacitor C71 (71st), Capacitor C72 (72nd), Capacitor C73 (73rd), Capacitor C74 (74th), Capacitor C75 (75th), Capacitor C76 (76th);

[0105] The first terminal of resistor R126 is connected to the second signal input interface. Resistor R126 is connected in sequence with resistors R127, R128, R129, R130, R131, R132, R133, and R134. The second terminal of resistor R134 is grounded.

[0106] The first terminal of capacitor C59 is connected to the second terminals of resistors R133, R134, and R135, respectively. The second terminal of resistor R135 is connected to the second terminal of resistor R137 and the third pin of operational amplifier U13, respectively. The first terminal of resistor R137 is connected to the second terminals of resistors R146 and R147, respectively. The first terminal of resistor R146 is connected to the second terminal of... The first terminal of capacitor C76 (76th), capacitor C75 (75th), Zener diode (3rd), and resistor R145 (145th) are connected. The first terminal of resistor R145 is connected to the first terminal of capacitor C74 (74th), capacitor C73 (73rd), and the output terminal of the power processing unit. The second terminal of capacitor C73 (73rd) is connected to the second terminal of capacitor C74 (74th), Zener diode (3rd), capacitor C75 (75th), and capacitor C76 (76th) and grounded.

[0107] The second pin of the thirteenth operational amplifier U13 is connected to the first terminal of the 136th resistor R136, the first terminal of the 138th resistor R138, the first terminal of the 60th capacitor C60, and the first terminal of the 61st capacitor C61, respectively. The second terminal of the 136th resistor is grounded. The second terminal of the 138th resistor R138 is connected to the second terminal of the 60th capacitor C60, the second terminal of the 61st capacitor C61, the first pin of the thirteenth operational amplifier U13, and the first terminal of the 139th resistor R139, respectively.

[0108] The eighth pin of the thirteenth operational amplifier U13 is connected to the first terminal of the sixty-second capacitor C62 and the output terminal of the power supply unit, respectively, and the second terminal of the sixty-second capacitor C62 is grounded.

[0109] The fifth pin of the thirteenth operational amplifier U13 is connected to the second terminal of the 139th resistor R139 and the first terminal of the 63rd capacitor C63, respectively. The second terminal of the 63rd capacitor C63 is grounded.

[0110] The sixth pin of the thirteenth operational amplifier U13 is connected to the first terminal of the sixty-fourth capacitor C64 and the first terminal of the sixty-fifth capacitor C65, respectively. The second terminal of the sixty-fourth capacitor C64 is grounded. The second terminal of the sixty-fifth capacitor C65 is connected to the seventh pin of the thirteenth operational amplifier U13, the first terminal of the sixty-sixth capacitor C66, the cathode of the twenty-eighth diode D28, and the second pin of the fifth isolation amplifier, respectively. The second terminal of the sixty-sixth capacitor C66 is connected to the anode of the twenty-eighth diode D28, the third pin of the fifth isolation amplifier, and the fourth pin of the fifth isolation amplifier, respectively, and is grounded.

[0111] The first pin of the fifth isolation amplifier is connected to the output terminal of the power supply processing unit and the first terminal of the sixty-seventh capacitor C67, respectively, and the second terminal of the sixty-seventh capacitor C67 is grounded.

[0112] The eighth pin of the fifth isolation amplifier is connected to the first terminal of the sixty-eighth capacitor C68 and the output terminal of the power supply processing unit, respectively, and the second terminal of the sixty-eighth capacitor C68 is grounded.

[0113] The seventh pin of the fifth isolation amplifier is connected to the first end of the 141st resistor R141. The second end of the 141st resistor R141 is connected to the fifth pin of the fourteenth operational amplifier U14, the first end of the 140th resistor R140, and the first end of the sixty-ninth capacitor C69. The second end of the 140th resistor R140 is connected to the second end of the sixty-ninth capacitor C69 and the anode of the twenty-ninth diode D29 and grounded.

[0114] The sixth pin of the fifth isolation amplifier is connected to the first end of the 142nd resistor R142. The second end of the 142nd resistor R142 is connected to the sixth pin of the fourteenth operational amplifier U14, the first end of the 143rd resistor R143, and the first end of the 70th capacitor C70. The second end of the 70th capacitor C70 is connected to the second end of the 143rd resistor R143, the seventh pin of the fourteenth operational amplifier U14, and the first end of the 144th resistor R144. The second end of the 144th resistor R144 is connected to the first end of the 71st capacitor C71, the first end of the 72nd capacitor C72, the cathode of the 29th diode D29, the anode of the 30th diode D30, and the input terminal of the control unit. The second end of the 30th diode D30 is connected to the output terminal of the power processing unit. The second end of the 71st capacitor C71 and the second end of the 72nd capacitor C72 are connected and grounded.

[0115] Preferably, the electromagnetic lock unit includes two sets of electromagnetic lock circuits. The electromagnetic lock unit is connected to the control terminal of the charging gun through a first signal input interface to control the locking and unlocking of the charging gun. When the device loses power, it controls the charging gun to automatically unlock. One electromagnetic lock circuit controls one charging gun. Figure 6 As shown, each electromagnetic lock circuit includes:

[0116] The second relay, the third transistor Q3, the thirty-first diode D31, and the thirty-second diode D32, all with the model number HK14FD-DC5V-SHG(5A);

[0117] Resistor 148 R148, resistor 149 R149, capacitor 77 C77, capacitor 78 C78;

[0118] The first pin of the second relay is connected to the anode of the thirty-first diode D31 and the collector of the third transistor Q3. The base of the third transistor Q3 is connected to the first terminal of the one hundred and forty-eighth resistor R148 and the first terminal of the one hundred and forty-ninth resistor R149. The second terminal of the one hundred and forty-ninth resistor R149 is connected to the emitter of the third transistor Q3 and grounded. The second terminal of the one hundred and forty-eighth resistor R148 is connected to the input terminal of the control unit.

[0119] The second pin and the sixth pin of the second relay are both connected to the second signal input interface;

[0120] The third pin of the second relay is connected to the first terminal of the seventy-seventh capacitor C77, and the second terminal of the seventy-seventh capacitor C77 is connected to the second signal input interface.

[0121] The fourth pin of the second relay is connected to the cathode of the thirty-second diode D32. The anode of the thirty-second diode D32 is connected to the first terminal of the seventy-eighth capacitor C78, ​​the seventh pin of the second relay, and the second signal input interface. The second terminal of the seventy-eighth capacitor C78 and the fifth pin of the second relay are both connected to the second signal input interface.

[0122] The eighth pin of the second relay is connected to the cathode of the thirty-first diode D31 and the output terminal of the power processing unit, respectively.

[0123] Preferably, it also includes a current detection unit consisting of two sets of current detection circuits. The current detection unit is connected to the external charging gun through a second signal transmission interface and is used to detect the current output by the charging gun. One set of detection circuits corresponds to one charging gun. Figure 7 As shown, each current detection circuit includes:

[0124] The sixth isolation amplifier, the fifteenth operational amplifier U15, the sixteenth operational amplifier U16, the thirty-third diode D33, the thirty-fourth diode D34, and the thirty-fifth diode D35;

[0125] Resistors R150, R151, R152, R153, R154, R155, R156, R157, R158, R159, R160, and R161 are listed below.

[0126] Capacitor C79 (79th), capacitor C80 (80th), capacitor C81 (81st), capacitor C82 (82nd), capacitor C83 (83rd), capacitor C84 (84th), capacitor C85 (85th), capacitor C86 (86th), capacitor C87 (87th), capacitor C88 (88th).

[0127] The first end of the 150th resistor R150 is connected to the second signal input interface, the first end of the 79th capacitor C79, and the first end of the 151st resistor R151. The second end of the 151st resistor R151 is connected to the first end of the 152nd resistor R152, the first end of the 80th capacitor C80, and the third pin of the 15th operational amplifier U15.

[0128] The second terminal of resistor R150 is connected to the second signal input interface, the second terminal of capacitor C79, the first terminal of resistor R154, and the first terminal of resistor R153. The second terminal of resistor R154 is grounded. The second terminal of resistor R153 is connected to the second terminal of capacitor C80, the second pin of operational amplifier U15, the first terminal of resistor R155, and the first terminal of capacitor C82.

[0129] The eighth pin of the fifteenth operational amplifier U15 is connected to the first terminal of the eighty-first capacitor C81 and the output terminal of the power supply unit, respectively. The second terminal of the eighty-first capacitor C81 is connected to the second terminal of the one hundred and fifty-second resistor R152 and grounded.

[0130] The first pin of the fifteenth operational amplifier U15 is connected to the second terminal of the eighty-second capacitor C82, the second terminal of the one hundred and fifty-fifth resistor R155, and the fifth pin of the fifteenth operational amplifier U15.

[0131] The sixth pin of the fifteenth operational amplifier U15 is connected to the seventh pin of the fifteenth operational amplifier U15 and the first end of the 156th resistor R156. The second end of the 156th resistor R156 is connected to the first end of the eighty-third capacitor C83, the cathode of the thirty-third diode D33, and the second pin of the sixth isolation amplifier. The second end of the eighty-third capacitor C83 is connected to the anode of the thirty-third diode D33, the third pin of the sixth isolation amplifier, and the fourth pin of the sixth isolation amplifier and grounded.

[0132] The first pin of the sixth isolation amplifier is connected to the output terminal of the power supply processing unit and the first terminal of the eighty-fourth capacitor C84, respectively, and the second terminal of the eighty-fourth capacitor C84 is grounded.

[0133] The eighth pin of the sixth isolation amplifier is connected to the output of the power supply unit and the first terminal of the eighty-fifth capacitor C85, respectively, and the second terminal of the eighty-fifth capacitor C85 is grounded.

[0134] The seventh pin of the sixth isolation amplifier is connected to the first end of the 157th resistor R157. The second end of the 157th resistor R157 is connected to the first end of the 159th resistor R159, the first end of the 86th capacitor C86, and the fifth pin of the sixteenth operational amplifier U16. The second end of the 159th resistor R159 is connected to the second end of the 86th capacitor C86 and the anode of the 34th diode D34 and grounded.

[0135] The sixth pin of the sixth isolation amplifier is connected to the first end of the 158th resistor R158. The second end of the 158th resistor R158 is connected to the sixth pin of the sixteenth operational amplifier U16, the first end of the 160th resistor R160, and the first end of the 87th capacitor C87. The second end of the 87th capacitor C87 is connected to the second end of the 160th resistor R160, the seventh pin of the sixteenth operational amplifier U16, and the first end of the 161st resistor R161. The second end of the 161st resistor R161 is connected to the cathode of the 34th diode D34, the anode of the 35th diode D35, the first end of the 88th capacitor C88, and the input terminal of the control unit. The cathode of the 35th diode D35 is connected to the output terminal of the power processing unit. The second end of the 88th capacitor C88 is grounded.

[0136] Preferably, the control unit includes a master control circuit and a slave control circuit;

[0137] The power supply terminals of both the main control circuit and the slave control circuit are connected to the output terminal of the power processing unit.

[0138] The input terminal of the main control circuit is connected to the output terminal of the slave control circuit;

[0139] The second input terminal of the main control circuit is connected to the output terminal of the temperature detection unit, the output terminal of the control guidance detection unit, the output terminal of the battery detection unit, and the output terminal of the insulation detection unit, respectively.

[0140] The output terminal of the main control circuit is connected to the control terminal of the insulation detection unit and the control terminal of the electromagnetic lock unit, respectively.

[0141] The data transmission terminals of the main control circuit are respectively connected to the first data transmission terminal of the Ethernet communication unit, the third data transmission terminal of the RS485 communication unit, the data transmission terminal of the 4G communication unit, the first data transmission terminal of the CAN communication unit, and the first data transmission terminal of the RS232 communication unit.

[0142] Connect the input terminal of the control circuit to the second terminal of the CAN communication unit.

[0143] In this embodiment of the invention, the main control circuit consists of the STM32F407ZET6 main control chip and its peripheral circuits. The chip uses STMicroelectronics' 90nm process and ART accelerator, and has dynamic power consumption adjustment function, which can achieve a current consumption as low as 238μA / MHz (@168MHz) in running mode and when executing from Flash memory. At a frequency of 168MHz, when executing from Flash memory, the STM32F407ZET6 can provide 210DMIPS / 566Core Mark performance, and achieves FLASH zero wait state by utilizing STMicroelectronics' ART accelerator.

[0144] In this embodiment of the invention, the control circuit consists of an STM32F105RBT6 and its peripheral circuitry. This chip integrates a high-performance processor operating at 72MHz. The system features a 24-bit RISC core, high-speed embedded memory (up to 256KB Flash memory and 64KB SRAM), and various enhanced I / O and peripheral devices connected to two APB buses. It provides two 12-bit ADCs, four general-purpose 16-bit timers, and one PWM timer as standard and advanced communication interfaces: up to two I2C, three SPI, two I2S, five USART, one USB OTG FS, and two CAN. In this embodiment, the slave control circuit is used to expand the master control circuit with two CAN communication interfaces.

[0145] Preferably, the CAN communication unit includes 4 CAN communication circuits;

[0146] The first data transmission terminal of the first CAN communication circuit and the first data transmission terminal of the second CAN communication circuit are the first terminals of the CAN communication unit. The first data transmission terminal of the first CAN communication circuit and the first data transmission terminal of the second CAN communication circuit are both connected to the data transmission terminal of the main control circuit.

[0147] The first data transmission terminal of the third CAN communication circuit and the first data transmission terminal of the fourth CAN communication circuit are the second terminals of the CAN communication unit. The first data transmission terminal of the third CAN communication circuit and the first data transmission terminal of the fourth CAN communication circuit are both connected to the first data transmission terminal of the slave control circuit.

[0148] The second data transmission terminal of all CAN communication circuits is connected to the communication interface;

[0149] The power supply terminals of all CAN communication circuits are connected to the output terminals of the power processing unit.

[0150] Preferably, the RS485 communication unit includes two sets of RS485 communication circuits;

[0151] The first data transmission terminal of all RS485 communication circuits is connected to the communication interface.

[0152] The power supply terminals of all RS485 communication circuits are connected to the output terminals of the power processing unit.

[0153] The second data transmission terminal of the first RS485 communication circuit is connected to the data transmission terminal of the main control circuit;

[0154] The second data transmission terminal of the second RS485 communication circuit is connected to the third data transmission terminal of the RS232 communication unit.

[0155] Preferably, the RS232 communication unit includes three sets of RS232 communication circuits;

[0156] The first data transmission terminal of all RS232 communication circuits is connected to the data transmission terminal of the main control circuit;

[0157] The power supply terminals of all RS232 communication circuits are connected to the output terminals of the power processing unit.

[0158] The second data transmission terminal of all RS232 communication circuits is connected to the communication interface;

[0159] The third data transmission terminal of all RS232 communication circuits is connected to the second data transmission terminal of the first RS485 communication circuit.

[0160] It should be noted that the Ethernet communication unit, 4G communication unit, CAN communication circuit, RS485 communication circuit, and RS232 communication circuit are all used by the control unit to upload charging parameters to the charging cloud platform and receive corresponding instructions from the platform. They all adopt conventional communication circuits in the field. This utility model embodiment does not involve any improvement to their specific circuit structure, so it will not be described in detail.

[0161] In this embodiment of the invention, the isolation amplifier used is the NSi1200-DDBR, a high-performance isolation amplifier based on capacitive isolation technology that separates the output and input. This device has a linear differential input signal range of ±250mV (full scale ±320mV). The differential input is ideal for shunt circuits requiring isolation for resistor-based high-voltage current sensing. The device has eight fixed gains and provides a differential analog output; its low offset and gain drift characteristics ensure accuracy across the entire temperature range. Its high common-mode transient immunity ensures accurate and reliable measurements.

[0162] In this embodiment of the invention, the operational amplifiers all use SGM8250-2XS8G / TR, which is a high-voltage, high-precision CMOS operational amplifier that can operate from a single power supply of 3V to 24V or from a dual power supply of ±1.5V to ±12V, and each amplifier consumes only 50μA of quiescent current.

[0163] This embodiment of the invention simplifies system integration and processing by mounting the power processing unit, control unit, temperature detection unit, control guidance detection unit, insulation detection unit, battery voltage detection unit, Ethernet communication unit, 4G communication unit, CAN communication unit, RS485 communication unit, RS232 communication unit, electromagnetic lock unit, first signal input interface, second signal input interface, and communication interface onto a single control board. This improves production efficiency and reduces installation time costs. Real-time monitoring of the charging process via the temperature detection unit, control guidance detection unit, insulation detection unit, and battery voltage detection unit enhances system safety. Diverse communication methods with the charging cloud platform are achieved through the Ethernet, 4G, CAN, RS485, and RS232 communication units. Automatic unlocking upon power failure via the electromagnetic lock unit further enhances system safety.

[0164] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A dual-gun DC charging pile controller, characterized in that, include: The following components are mounted on a control board: power processing unit, control unit, temperature detection unit, control guidance detection unit, insulation detection unit, battery voltage detection unit, Ethernet communication unit, 4G communication unit, CAN communication unit, RS485 communication unit, RS232 communication unit, electromagnetic lock unit, first signal input interface, second signal input interface, and communication interface. The input terminal of the power processing unit is connected to the mains power terminal, and the output terminal of the power processing unit is connected to the power terminals of the control unit, the temperature detection unit, the control guidance detection unit, the insulation detection unit, the battery voltage detection unit, the Ethernet communication unit, the 4G communication unit, the CAN communication unit, the RS485 communication unit, the RS232 communication unit, and the electromagnetic lock unit. The input terminal of the temperature detection unit and the input terminal of the control guidance detection unit are both connected to the first signal input interface; The input terminals of the battery voltage detection unit, the insulation detection unit, and the electromagnetic lock unit are all connected to the second signal input interface. The third data transmission terminal of the CAN communication unit, the first data transmission terminal of the RS485 communication unit, and the second data transmission terminal of the RS232 communication unit are all connected to the communication interface, and the second data transmission terminal of the RS485 communication unit is connected to the third data transmission terminal of the RS232 communication unit. The output terminals of the temperature detection unit, the control guidance detection unit, the battery voltage detection unit, and the insulation detection unit are all connected to the input terminal of the control unit. The first data transmission terminal of the CAN communication unit, the second data transmission terminal of the CAN communication unit, the data transmission terminal of the 4G communication unit, the data transmission terminal of the Ethernet communication unit, the third data transmission terminal of the RS485 communication unit, and the first data transmission terminal of the RS232 communication unit are all connected to the data transmission terminal of the control unit. The output terminal of the control unit is connected to the control terminal of the insulation detection unit and the control terminal of the electromagnetic lock unit, respectively.

2. The dual-gun DC charging pile controller according to claim 1, characterized in that, The temperature detection unit includes: Resistor 1, Resistor 2, Resistor 3, Resistor 4, Resistor 5, Resistor 6, Resistor 7, Resistor 8, Resistor 9, Resistor 10, Resistor 11, Resistor 12, Resistor 13, Resistor 14, Resistor 15, Resistor 16, Resistor 17, Resistor 18, Resistor 19, Resistor 20, Resistor 21, Resistor 22, Resistor 23, Resistor 24, Resistor 25, Resistor 26, Resistor 27, Resistor 28, Resistor 29, Resistor 30, Resistor 31, Resistor 32, Resistor 33, Resistor 34, Resistor 35, Resistor 36, Resistor 37, Resistor 38, Resistor 39, Resistor 40, Resistor 41, Resistor 42, Resistor 43, Resistor 44, Resistor 45, Resistor 46, Resistor 47; First capacitor, second capacitor, third capacitor, fourth capacitor, fifth capacitor, sixth capacitor, seventh capacitor, eighth capacitor, ninth capacitor, tenth capacitor, eleventh capacitor, twelfth capacitor, thirteenth capacitor, fourteenth capacitor, fifteenth capacitor, sixteenth capacitor, seventeenth capacitor, eighteenth capacitor, nineteenth capacitor, twentieth capacitor, twenty-first capacitor, twenty-second capacitor, twenty-third capacitor, twenty-fourth capacitor, twenty-fifth capacitor, twenty-sixth capacitor, twenty-seventh capacitor, twenty-eighth capacitor, twenty-ninth capacitor, thirtieth capacitor; First diode, second diode, third diode, fourth diode, fifth diode, sixth diode, seventh diode, eighth diode, ninth diode, tenth diode, eleventh diode, twelfth diode, first Zener diode; First operational amplifier, second operational amplifier, third operational amplifier, fourth operational amplifier, fifth operational amplifier, sixth operational amplifier, seventh operational amplifier; The first terminal of the first resistor and the first terminal of the first capacitor are both connected to the output terminal of the power processing unit. The second terminal of the first resistor is connected to the first terminal of the first Zener diode, the second terminal of the first Zener diode, the first terminal of the second capacitor, the first terminal of the third capacitor, the first terminal of the second resistor, and the third pin of the first operational amplifier. The second terminal of the first capacitor is connected to the third terminal of the first Zener diode, the second terminal of the second capacitor, and the second terminal of the third capacitor, and grounded. The second terminal of the second resistor is connected to the first terminal of the third resistor and the fifth pin of the first operational amplifier, and the second terminal of the third resistor is grounded. The sixth pin of the first operational amplifier is connected to the seventh pin of the first operational amplifier, the first terminal of the eighth resistor, the first terminal of the eighteenth resistor, the first terminal of the twenty-eighth resistor, and the first terminal of the thirty-eighth resistor. The second pin of the first operational amplifier is connected to the first pin of the first operational amplifier, the first terminal of the fourth resistor, and the fifth pin of the first operational amplifier. The first end of the resistor, the first end of the sixth resistor, and the first end of the seventh resistor are connected. The second end of the fourth resistor is connected to the first end of the fourth diode, the first signal input interface, and the first end of the thirty-ninth resistor. The second end of the fifth resistor is connected to the first end of the third diode, the first signal input interface, and the first end of the twenty-ninth resistor. The second end of the sixth resistor is connected to the first end of the second diode, the first signal input interface, and the first end of the nineteenth resistor. The second end of the seventh resistor is connected to the first end of the first diode, the first signal input interface, and the first end of the ninth resistor. The second ends of the fourth diode, the third diode, the second diode, and the first diode are all grounded. The eighth pin of the first operational amplifier is connected to the first end of the fourth resistor, the first end of the fifth resistor, and the output terminal of the power processing unit. The second end of the fourth resistor is connected to the second end of the fifth resistor and grounded. The second end of the eighth resistor is connected to the first end of the sixth capacitor and the fifth pin of the second operational amplifier. The sixth pin of the second operational amplifier is connected to the second end of the eleventh resistor and the first end of the twelfth resistor. The first end of the eleventh resistor is connected to the seventh pin of the second operational amplifier and the first end of the tenth resistor. The second end of the tenth resistor is connected to the sixth pin of the fourth operational amplifier and the first end of the fifteenth resistor. The second end of the fifteenth resistor is connected to the seventh pin of the fourth operational amplifier and the first end of the seventeenth resistor. The second end of the seventeenth resistor is connected to the anode of the fifth diode, the cathode of the sixth diode, the first end of the tenth capacitor, the first end of the eleventh capacitor, and the input terminal of the controller. The second end of the tenth capacitor is connected to the second end of the eleventh capacitor and grounded. The cathode of the fifth diode and the second end of the sixth capacitor are both grounded. The anode of the sixth diode is connected to the output terminal of the power processing unit. The second terminal of the ninth resistor is connected to the first terminal of the seventh capacitor and the third pin of the second operational amplifier. The second pin of the second operational amplifier is connected to the second terminal of the twelfth resistor and the first terminal of the thirteenth resistor. The second terminal of the thirteenth resistor is connected to the first pin of the second operational amplifier and the first terminal of the fourteenth resistor. The second terminal of the fourteenth resistor is connected to the fifth pin of the fourth operational amplifier and the first terminal of the sixteenth resistor. The eighth pin of the second operational amplifier is connected to the first terminal of the eighth capacitor, the first terminal of the ninth capacitor, and the output terminal of the power processing unit. The second terminal of the eighth capacitor is connected to the second terminal of the ninth capacitor and grounded. The second terminals of the seventh capacitor and the sixteenth resistor are both grounded. The second end of the eighteenth resistor is connected to the first end of the twelfth capacitor and the fifth pin of the third operational amplifier. The sixth pin of the third operational amplifier is connected to the second end of the twenty-first resistor and the first end of the twenty-second resistor. The first end of the twenty-first resistor is connected to the seventh pin of the third operational amplifier and the first end of the twenty-first resistor. The second end of the twenty-first resistor is connected to the first end of the twenty-fifth resistor and the second pin of the fourth operational amplifier. The second end of the twenty-fifth resistor is connected to the first pin of the fourth operational amplifier and the first end of the twenty-seventh resistor. The second end of the twenty-seventh resistor is connected to the anode of the seventh diode, the cathode of the eighth diode, the first end of the sixteenth capacitor, the first end of the seventeenth capacitor, and the input terminal of the control unit. The second end of the sixteenth capacitor is connected to the second end of the seventeenth capacitor and grounded. The eighth pin of the fourth operational amplifier is connected to the first end of the fifteenth capacitor. The second ends of the twelfth resistor, the fifteenth capacitor, and the cathode of the seventh diode are all grounded. The anode of the eighth diode is connected to the output terminal of the power processing unit. The second terminal of the nineteenth resistor is connected to the first terminal of the thirteenth capacitor and the third pin of the third operational amplifier. The second pin of the third operational amplifier is connected to the second terminal of the twenty-second resistor and the first terminal of the twenty-third resistor. The second terminal of the twenty-third resistor is connected to the first pin of the third operational amplifier and the first terminal of the twenty-fourth resistor. The second terminal of the twenty-fourth resistor is connected to the third pin of the fourth operational amplifier and the first terminal of the twenty-sixth resistor. The eighth pin of the third operational amplifier is connected to the first terminal of the fourteenth capacitor and the output terminal of the power processing unit. The second terminals of the fourteenth capacitor, the thirteenth capacitor, and the twenty-sixth resistor are all grounded. The second end of the 28th resistor is connected to the first end of the 18th capacitor and the fifth pin of the fifth operational amplifier. The sixth pin of the fifth operational amplifier is connected to the second end of the 31st resistor and the first end of the 32nd resistor. The first end of the 31st resistor is connected to the seventh pin of the fifth operational amplifier and the first end of the 30th resistor. The second end of the 30th resistor is connected to the sixth pin of the seventh operational amplifier and the first end of the 35th resistor. The second end of the 35th resistor is connected to the seventh pin of the seventh operational amplifier and the first end of the 37th resistor. The second end of the 37th resistor is connected to the anode of the 9th diode, the cathode of the 10th diode, the first end of the 22nd capacitor, the first end of the 23rd capacitor, and the input terminal of the control unit. The cathode of the 9th diode and the second end of the 18th capacitor are both grounded. The anode of the 10th diode is connected to the output terminal of the power processing unit. The second end of the 22nd capacitor and the second end of the 23rd capacitor are connected and grounded. The second end of the 29th resistor is connected to the first end of the 19th capacitor and the third pin of the fifth operational amplifier. The second pin of the fifth operational amplifier is connected to the second end of the 32nd resistor and the first end of the 33rd resistor. The second end of the 33rd resistor is connected to the first pin of the fifth operational amplifier and the first end of the 34th resistor. The second end of the 34th resistor is connected to the fifth pin of the seventh operational amplifier and the first end of the 36th resistor. The eighth pin of the fifth operational amplifier is connected to the first end of the 20th capacitor, the first end of the 21st capacitor, and the output terminal of the power processing unit. The second end of the 20th capacitor is connected to the second end of the 21st capacitor and grounded. The second ends of the 19th capacitor and the 36th resistor are both grounded. The second terminal of the thirty-eighth resistor is connected to the first terminal of the twenty-fourth capacitor and the fifth pin of the sixth operational amplifier. The sixth pin of the sixth operational amplifier is connected to the second terminal of the forty-first resistor and the first terminal of the forty-second resistor. The first terminal of the forty-first resistor is connected to the seventh pin of the sixth operational amplifier and the first terminal of the fortyth resistor. The second terminal of the fortyth resistor is connected to the second pin of the seventh operational amplifier and the first terminal of the forty-fifth resistor. The second terminal of the forty-fifth resistor is connected to the first pin of the seventh operational amplifier and the first terminal of the forty-seventh resistor. The second terminal of the forty-seventh resistor is connected to the second pin of the forty-first resistor and the first terminal of the forty-seventh resistor. The eleventh diode is connected to the anode, the twelfth diode to the cathode, the first terminal of the twenty-ninth capacitor, the first terminal of the thirtieth capacitor, and the input terminal of the control unit. The cathode of the eleventh diode and the second terminal of the twenty-fourth capacitor are both grounded. The anode of the twelfth diode is connected to the output terminal of the power processing unit. The second terminal of the twenty-ninth capacitor is connected to the second terminal of the thirtieth capacitor and grounded. The eighth pin of the seventh operational amplifier is connected to the first terminal of the twenty-seventh capacitor, the first terminal of the twenty-eighth capacitor, and the output terminal of the power processing unit. The second terminal of the twenty-seventh capacitor is connected to the second terminal of the twenty-eighth capacitor and grounded. The second end of the thirty-ninth resistor is connected to the first end of the twenty-fifth capacitor and the third pin of the sixth operational amplifier. The second pin of the sixth operational amplifier is connected to the second end of the forty-second resistor and the first end of the forty-third resistor. The second end of the forty-third resistor is connected to the first pin of the sixth operational amplifier and the first end of the forty-fourth resistor. The second end of the forty-fourth resistor is connected to the third pin of the seventh operational amplifier and the first end of the forty-sixth resistor. The eighth pin of the sixth operational amplifier is connected to the first end of the twenty-sixth capacitor and the output terminal of the power processing unit. The second ends of the forty-sixth resistor, the twenty-fifth capacitor, and the twenty-sixth capacitor are all grounded.

3. The dual-gun DC charging pile controller according to claim 2, characterized in that, The control guidance detection unit includes: Resistor number 48, resistor number 49, resistor number 50, resistor number 51, resistor number 52, resistor number 53, resistor number 54, resistor number 55, resistor number 56, resistor number 57, resistor number 58, resistor number 59, resistor number 60, resistor number 61, resistor number 62, resistor number 63, resistor number 64, resistor number 65, resistor number 66, resistor number 67, resistor number 68, resistor number 69; The thirteenth capacitor, the fourteenth capacitor, the fifteenth capacitor, the sixteenth capacitor, the seventeenth capacitor, the eighteenth capacitor, the nineteenth capacitor, the twentieth capacitor, the twenty-first capacitor, the twenty-second capacitor, the twenty-third capacitor, the twenty-fourth capacitor, the twenty-fifth capacitor, the twenty-sixth capacitor, the twenty-seventh capacitor, the twenty-eighth capacitor, the twenty-ninth capacitor, the thirtieth capacitor, and the thirty-first capacitor; The thirteenth diode, the fourteenth diode, the fifteenth diode, the sixteenth diode, the seventeenth diode, the eighteenth diode, the nineteenth diode, and the twentieth diode; Eighth operational amplifier, ninth operational amplifier, tenth operational amplifier, first isolation amplifier, second isolation amplifier; The first end of the forty-eighth resistor and the first end of the fifty-ninth resistor are both connected to the output end of the power processing unit. The second end of the forty-eighth resistor is connected to the first signal input interface, the first end of the thirteenth diode, and the first end of the forty-ninth resistor. The second end of the forty-ninth resistor is connected to the first end of the fiftieth resistor. The second end of the fiftieth resistor is connected to the first end of the fifty-first resistor and the first end of the fifty-second resistor. The second end of the fifty-first resistor is connected to the first end of the thirteenth capacitor and the third pin of the eighth operational amplifier. The second end of the thirteenth diode is connected to the second end of the fifty-second resistor and the second end of the thirteenth capacitor and grounded. The fourth pin of the eighth operational amplifier is connected to the first pin of the eighth operational amplifier and the first end of the fifty-third resistor, respectively. The second end of the fifty-third resistor is connected to the anode of the fourteenth diode, the first end of the sixteenth capacitor, and the second pin of the first isolation amplifier, respectively. The cathode of the fourteenth diode is connected to the second end of the sixteenth capacitor, the third pin of the first isolation amplifier, and the fourth pin of the first isolation amplifier and grounded. The fifth pin of the eighth operational amplifier is connected to the output terminal of the power processing unit and the first terminal of the fourteenth capacitor, respectively, and the second terminal of the fourteenth capacitor is grounded. The first pin of the first isolation amplifier is connected to the first terminal of the fifteenth capacitor and the output terminal of the power processing unit, respectively, and the second terminal of the fifteenth capacitor is grounded. The eighth pin of the first isolation amplifier is connected to the first terminal of the seventeenth capacitor and the output terminal of the power processing unit, respectively, and the second terminal of the seventeenth capacitor is grounded; The seventh pin of the first isolation amplifier is connected to the first end of the fifty-fourth resistor. The second end of the fifty-fourth resistor is connected to the fifth pin of the tenth operational amplifier, the first end of the fifty-sixth resistor, and the first end of the eighteenth capacitor. The second end of the fifty-sixth resistor is connected to the second end of the eighteenth capacitor and the anode of the fifteenth diode and grounded. The sixth pin of the first isolation amplifier is connected to the first end of the fifty-fifth resistor. The second end of the fifty-fifth resistor is connected to the sixth pin of the tenth operational amplifier, the first end of the fifty-seventh resistor, and the first end of the nineteenth capacitor. The second end of the nineteenth capacitor is connected to the second end of the fifty-seventh resistor, the seventh pin of the tenth operational amplifier, and the first end of the fifty-eighth resistor. The second end of the fifty-eighth resistor is connected to the first end of the twentyth capacitor, the first end of the twenty-first capacitor, the cathode of the fifteenth diode, the anode of the sixteenth diode, and the input terminal of the control unit. The cathode of the sixteenth diode is connected to the output terminal of the power processing unit. The second end of the twentyth capacitor is connected to the second end of the twenty-first capacitor and grounded. The second end of the fifty-ninth resistor is connected to the first signal input interface, the first end of the seventeenth diode, and the first end of the sixtieth resistor. The second end of the sixtieth resistor is connected to the first end of the sixty-first resistor. The second end of the sixty-first resistor is connected to the first end of the sixty-second resistor and the first end of the sixty-third resistor. The second end of the sixty-second resistor is connected to the first end of the twenty-second capacitor and the third pin of the ninth operational amplifier. The second end of the seventeenth diode is connected to the second end of the sixty-third resistor and the second end of the twenty-second capacitor. The fourth pin of the ninth operational amplifier is connected to the first pin of the ninth operational amplifier and the first end of the sixty-fourth resistor, respectively. The second end of the sixty-fourth resistor is connected to the cathode of the eighteenth diode, the first end of the twenty-fifth capacitor, and the second pin of the second isolation amplifier, respectively. The anode of the eighteenth diode is connected to the second end of the twenty-fifth capacitor, the third pin of the second isolation amplifier, and the fourth pin of the second isolation amplifier, respectively, and grounded. The fifth pin of the ninth operational amplifier is connected to the output terminal of the power processing unit and the first terminal of the twenty-third capacitor, respectively, and the second terminal of the twenty capacitor is grounded. The first pin of the second isolation amplifier is connected to the output terminal of the power processing unit and the first terminal of the second fourteenth capacitor, respectively, and the second terminal of the second fourteenth capacitor is grounded. The eighth pin of the second isolation amplifier is connected to the output terminal of the power processing unit and the first terminal of the second sixteenth capacitor, respectively, and the second terminal of the second sixteenth capacitor is grounded. The seventh pin of the second isolation amplifier is connected to the first end of the sixty-fifth resistor. The second end of the sixty-fifth resistor is connected to the third pin of the tenth operational amplifier, the first end of the sixty-seventh resistor, and the first end of the twenty-seventh capacitor. The second end of the sixty-seventh resistor is connected to the second end of the twenty-seventh capacitor, the second end of the twenty-eighth capacitor, and the anode of the nineteenth diode and grounded. The first end of the twenty-eighth capacitor is connected to the eighth pin of the tenth operational amplifier and the output terminal of the power processing unit. The sixth pin of the second isolation amplifier is connected to the first end of the sixty-sixth resistor. The second end of the sixty-sixth resistor is connected to the second pin of the tenth operational amplifier, the first end of the sixty-eighth resistor, and the first end of the twenty-ninth capacitor. The second end of the twenty-ninth capacitor is connected to the second end of the sixty-eighth resistor, the first pin of the tenth operational amplifier, and the first end of the sixty-ninth resistor. The second end of the sixty-ninth resistor is connected to the first end of the thirtieth capacitor, the first end of the thirty-first capacitor, the cathode of the nineteenth diode, the anode of the twentyth diode, and the input terminal of the control unit. The cathode of the twentyth diode is connected to the output terminal of the power processing unit. The second end of the thirtieth capacitor is connected to the second end of the thirty-first capacitor and grounded.

4. The dual-gun DC charging pile controller according to claim 3, characterized in that, The insulation detection unit consists of two sets of insulation detection circuits, each set of insulation detection circuits including: First relay, first optocoupler, second optocoupler, second Zener diode, first transistor, second transistor, third transistor, eleventh operational amplifier, twelfth operational amplifier, third isolation amplifier, fourth isolation amplifier; Resistor number 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100th resistor Resistors 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, and 125; Capacitor number 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58; Diodes 21, 22, 23, 24, 25, 26, and 27; The first end of the 70th resistor is connected to the output terminal of the control unit. The second end of the 70th resistor is connected to the first end of the 71st resistor and the base of the first transistor. The second end of the 71st resistor is connected to the emitter of the first transistor and grounded. The collector of the first transistor is connected to the anode of the 21st diode and the second pin of the first relay. The cathode of the 21st diode is connected to the first pin of the first relay and the output terminal of the power processing unit. The 72nd resistor is connected in sequence to the 73rd, 74th, 75th, and 76th resistors; the 77th resistor is connected in sequence to the 78th, 79th, 80th, 81st, and 82nd resistors; the first end of the 72nd resistor is connected to the first end of the 77th resistor and the second signal input interface; and the second end of the 82nd resistor is connected to the eighth pin of the first optocoupler. The first pin of the first optocoupler is connected to the second end of the eighty-third resistor, and the first end of the eighty-third resistor is connected to the output end of the power processing unit. The fourth pin of the first optocoupler is connected to the collector of the second transistor, the base of the second transistor is connected to the first end of the eighty-fourth resistor and the first end of the eighty-fifth resistor, the second end of the eighty-fourth resistor is connected to the input terminal of the control unit, and the second end of the eighty-fifth resistor is connected to the emitter of the second transistor and grounded. The fifth pin of the first optocoupler is connected to the second terminal of the eighty-seventh resistor, the eighth pin of the second optocoupler, and the first terminal of the one hundred and twelveth resistor, and is grounded. The first end of the 87th resistor is connected to the second end of the 76th resistor and the first end of the 86th resistor respectively. The second end of the 86th resistor is connected to the first end of the 32nd capacitor and the first end of the 88th resistor respectively. The second end of the 88th resistor is connected to the fifth pin of the 11th operational amplifier and the first end of the 89th resistor respectively. The second end of the 89th resistor is grounded. The second end of the 32nd capacitor is connected to the first end of the 33rd capacitor and grounded. The sixth pin of the eleventh operational amplifier is connected to the first terminal of the ninetieth resistor and the first terminal of the ninety-first resistor, respectively. The second terminal of the ninetieth resistor is grounded. The second terminal of the ninety-first resistor is connected to the seventh pin of the eleventh operational amplifier and the first terminal of the ninety-second resistor, respectively. The second terminal of the ninety-second resistor is connected to the cathode of the twenty-second diode, the first terminal of the thirty-fourth capacitor, and the second pin of the third isolation amplifier, respectively. The anode of the twenty-second diode is connected to the second terminal of the thirty-fourth capacitor, the third pin of the third isolation amplifier, and the fourth pin of the third isolation amplifier, respectively, and grounded. The first pin of the third isolation amplifier is connected to the first terminal of the thirty-fifth capacitor and the output terminal of the power processing unit, respectively, and the second terminal of the thirty-fifth capacitor is grounded. The eighth pin of the third isolation amplifier is connected to the first terminal of the thirty-sixth capacitor and the output terminal of the power processing unit, respectively, and the second terminal of the thirty-sixth capacitor is grounded. The seventh pin of the third isolation amplifier is connected to the first end of the ninety-third resistor. The second end of the ninety-third resistor is connected to the first end of the thirty-seventh capacitor, the first end of the thirty-eighth capacitor, the first end of the ninety-fifth resistor, and the fifth pin of the twelfth operational amplifier. The second end of the ninety-fifth resistor is connected to the second end of the thirty-seventh capacitor, the second end of the thirty-eighth capacitor, the first end of the one hundred and twenty-fourth resistor, and the first end of the one hundred and twenty-fiveth resistor. The sixth pin of the third isolation amplifier is connected to the first end of the ninety-fourth resistor. The second end of the ninety-fourth resistor is connected to the sixth pin of the twelfth operational amplifier, the first end of the ninety-sixth resistor, the first end of the thirty-ninth capacitor, and the first end of the fortieth capacitor. The second end of the fortieth capacitor is connected to the second end of the thirty-ninth capacitor, the second end of the ninety-sixth resistor, the seventh pin of the twelfth operational amplifier, and the first end of the ninety-seventh resistor. The second end of the ninety-seventh resistor is connected to the first end of the forty-first capacitor, the cathode of the twenty-third diode, the anode of the twenty-fourth diode, the first end of the forty-second capacitor, and the input terminal of the control unit. The anode of the twenty-third diode is grounded. The cathode of the twenty-fourth diode is connected to the output terminal of the power processing unit. The second end of the forty-first capacitor is connected to the second end of the forty-second capacitor and grounded. The first pin of the second optocoupler is connected to the second end of the ninety-ninth resistor, and the first end of the ninety-ninth resistor is connected to the output end of the power processing unit. The fourth pin of the second optocoupler is connected to the collector of the third transistor, the base of the third transistor is connected to the first end of the ninety-eighth resistor and the first end of the first hundredth resistor, the second end of the ninety-eighth resistor is connected to the input terminal of the control unit, and the second end of the first hundredth resistor is connected to the emitter of the third transistor and grounded. The fifth pin of the second optocoupler is connected to the first end of the first 101 resistor. The first 101 resistor is connected in sequence to the first 102 resistor, the first 103 resistor, the first 104 resistor, the first 105 resistor, and the first 106 resistor. The second end of the first 106 resistor is connected to the first end of the first 107 resistor and the second signal input interface. The first 107 resistor is connected in sequence with the first 108 resistor, the first 109 resistor, the first 110 resistor, and the first 111 resistor; The first 111 resistor is connected to the second terminal of the first 112 resistor and the first terminal of the first 113 resistor, respectively. The second terminal of the first 113 resistor is connected to the second terminal of the third 3rd capacitor and the first terminal of the first 115 resistor, respectively. The second terminal of the first 115 resistor is connected to the second pin of the eleventh operational amplifier and the first terminal of the first 116 resistor, respectively. The second terminal of the first 116 resistor is connected to the first pin of the eleventh operational amplifier and the first terminal of the first 117 resistor, respectively. The second terminal of the first 117 resistor is connected to the cathode of the twenty-fifth diode, the first terminal of the forty-fifth capacitor, and the second pin of the fourth isolation amplifier, respectively. The anode of the twenty-fifth diode is connected to the second terminal of the forty-fifth capacitor, the third pin of the fourth isolation amplifier, and the fourth pin of the fourth isolation amplifier and grounded. The third pin of the eleventh operational amplifier is connected to the first end of the first 114th resistor, and the second end of the first 114th resistor is grounded. The fourth pin of the eleventh operational amplifier is connected to the output terminal of the power processing unit and the first terminal of the forty-fourth capacitor, respectively, and the second terminal of the forty-fourth capacitor is grounded. The eighth pin of the eleventh operational amplifier is connected to the output terminal of the power processing unit and the first terminal of the forty-third capacitor, respectively, and the second terminal of the forty-third capacitor is grounded. The first pin of the fourth isolation amplifier is connected to the first terminal of the forty-sixth capacitor and the output terminal of the power processing unit, respectively, and the second terminal of the forty-sixth capacitor is grounded. The eighth pin of the fourth isolation amplifier is connected to the first terminal of the forty-seventh capacitor and the output terminal of the power processing unit, respectively, and the second terminal of the forty-seventh capacitor is grounded. The seventh pin of the fourth isolation amplifier is connected to the first end of the first 118 resistors. The second end of the first 118 resistors is connected to the first end of the first 120 resistors, the first end of the forty-eighth capacitor, the first end of the forty-ninth capacitor, and the third pin of the twelfth operational amplifier. The second end of the first 120 resistors is connected to the second end of the forty-eighth capacitor, the second end of the forty-ninth resistor, and the output end of the power processing unit. The sixth pin of the fourth isolation amplifier is connected to the first end of the first 119th resistor. The second end of the first 119th resistor is connected to the second pin of the twelfth operational amplifier, the first end of the first 121st resistor, the first end of the fifty-first capacitor, and the first end of the fifty-second capacitor. The second end of the fifty-second capacitor is connected to the second end of the fifty-first capacitor, the second end of the first 121st resistor, the first pin of the twelfth operational amplifier, and the first end of the first 122nd resistor. The second end of the first 122nd resistor is connected to the first end of the fifty-third capacitor, the cathode of the twenty-sixth diode, the anode of the twenty-seventh diode, the first end of the fifty-fourth capacitor, and the input terminal of the control unit. The cathode of the twenty-seventh diode is connected to the output terminal of the power processing unit. The fourth pin of the twelfth operational amplifier is connected to the second terminal of the fifty-third capacitor and the second terminal of the fifty-fourth capacitor, respectively, and grounded. The eighth pin of the twelfth operational amplifier is connected to the output terminal of the power processing unit and the first terminal of the fiftieth capacitor, respectively. The second terminal of the fiftieth capacitor is connected to the anode of the twenty-sixth diode and grounded. The second end of the first 124 resistor is connected to the first end of the 58th capacitor, the first end of the 57th capacitor, the first end of the second Zener diode, the second end of the second Zener diode, and the first end of the first 123 resistor. The second end of the first 123 resistor is connected to the output terminal of the power processing unit, the first end of the 56th capacitor, and the first end of the 55th capacitor. The second end of the 55th capacitor is connected to the second end of the 56th capacitor, the third end of the second Zener diode, the second end of the 57th capacitor, and the second end of the 58th capacitor and grounded. The second end of the first 125 resistor is grounded.

5. The dual-gun DC charging pile controller according to claim 4, characterized in that, The battery voltage detection unit consists of two sets of battery detection circuits, each set of battery detection circuits including: Fifth isolation amplifier, thirteenth operational amplifier, fourteenth operational amplifier, third Zener diode, twenty-eighth diode, twenty-ninth diode, thirtieth diode; Resistors 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, and 147; Capacitor number 59, capacitor number 60, capacitor number 61, capacitor number 62, capacitor number 63, capacitor number 64, capacitor number 65, capacitor number 66, capacitor number 67, capacitor number 68, capacitor number 69, capacitor number 70, capacitor number 71, capacitor number 72, capacitor number 73, capacitor number 74, capacitor number 75, capacitor number 76; The first end of the first 126 resistor is connected to the second signal input interface. The first 126 resistor is connected in sequence with the first 127 resistor, the first 128 resistor, the first 129 resistor, the first 130 resistor, the first 131 resistor, the first 132 resistor, the first 133 resistor, and the first 134 resistor. The second end of the first 134 resistor is grounded. The first terminal of the 59th capacitor is connected to the second terminals of the 133rd, 134th, and 135th resistors, respectively. The second terminal of the 135th resistor is connected to the second terminal of the 137th resistor and the third pin of the 13th operational amplifier, respectively. The first terminal of the 137th resistor is connected to the second terminals of the 146th and 147th resistors, respectively. The first terminal of the 146th resistor is connected to the first terminals of the 76th, 75th, 3rd, and 145th resistors, respectively. The first terminal of the 145th resistor is connected to the first terminals of the 74th, 73rd, and the output terminal of the power processing unit, respectively. The second terminal of the 73rd capacitor is connected to the second terminals of the 74th, 3rd, 75th, and 76th capacitors and grounded. The second pin of the thirteenth operational amplifier is connected to the first terminal of the 136th resistor, the first terminal of the 138th resistor, the first terminal of the 60th capacitor, and the first terminal of the 61st capacitor, respectively. The second terminal of the 136th resistor is grounded. The second terminal of the 138th resistor is connected to the second terminal of the 60th capacitor, the second terminal of the 61st capacitor, the first pin of the thirteenth operational amplifier, and the first terminal of the 139th resistor, respectively. The eighth pin of the thirteenth operational amplifier is connected to the first terminal of the sixty-second capacitor and the output terminal of the power processing unit, respectively, and the second terminal of the sixty-second capacitor is grounded. The fifth pin of the thirteenth operational amplifier is connected to the second terminal of the 139th resistor and the first terminal of the 63rd capacitor, respectively, and the second terminal of the 63rd capacitor is grounded. The sixth pin of the thirteenth operational amplifier is connected to the first terminal of the sixty-fourth capacitor and the first terminal of the sixty-fifth capacitor, respectively. The second terminal of the sixty-fourth capacitor is grounded. The second terminal of the sixty-fifth capacitor is connected to the seventh pin of the thirteenth operational amplifier, the first terminal of the sixty-sixth capacitor, the cathode of the twenty-eighth diode, and the second pin of the fifth isolation amplifier, respectively. The second terminal of the sixty-sixth capacitor is connected to the anode of the twenty-eighth diode, the third pin of the fifth isolation amplifier, and the fourth pin of the fifth isolation amplifier, respectively, and grounded. The first pin of the fifth isolation amplifier is connected to the output terminal of the power processing unit and the first terminal of the sixty-seventh capacitor, respectively, and the second terminal of the sixty-seventh capacitor is grounded. The eighth pin of the fifth isolation amplifier is connected to the first terminal of the sixty-eighth capacitor and the output terminal of the power processing unit, respectively, and the second terminal of the sixty-eighth capacitor is grounded. The seventh pin of the fifth isolation amplifier is connected to the first end of the first 141 resistors. The second end of the first 141 resistors is connected to the fifth pin of the fourteenth operational amplifier, the first end of the first 140 resistors, and the first end of the sixty-ninth capacitor. The second end of the first 140 resistors is connected to the second end of the sixty-ninth capacitor and the anode of the twenty-ninth diode and grounded. The sixth pin of the fifth isolation amplifier is connected to the first end of the first 142 resistor. The second end of the first 142 resistor is connected to the sixth pin of the fourteenth operational amplifier, the first end of the first 143 resistor, and the first end of the seventieth capacitor. The second end of the seventieth capacitor is connected to the second end of the first 143 resistor, the seventh pin of the fourteenth operational amplifier, and the first end of the first 144 resistor. The second end of the first 144 resistor is connected to the first end of the seventy-first capacitor, the first end of the seventy-second capacitor, the cathode of the twenty-ninth diode, the anode of the thirtieth diode, and the input terminal of the control unit. The second end of the thirtieth diode is connected to the output terminal of the power processing unit. The second end of the seventy-first capacitor is connected to the second end of the seventy-second capacitor and grounded.

6. The dual-gun DC charging pile controller according to claim 5, characterized in that, The electromagnetic lock unit includes two sets of electromagnetic lock circuits, and each set of electromagnetic lock circuits includes: Second relay, third transistor, thirty-first diode, thirty-second diode; Resistor number 148, resistor number 149, capacitor number 77, capacitor number 78; The first pin of the second relay is connected to the anode of the thirty-first diode and the collector of the third transistor, respectively. The base of the third transistor is connected to the first end of the first 148 resistor and the first end of the first 149 resistor, respectively. The second end of the first 149 resistor is connected to the emitter of the third transistor and grounded. The second end of the first 148 resistor is connected to the input terminal of the control unit. The second pin and the sixth pin of the second relay are both connected to the second signal input interface; The third pin of the second relay is connected to the first terminal of the seventy-seventh capacitor, and the second terminal of the seventy-seventh capacitor is connected to the second signal input interface; The fourth pin of the second relay is connected to the cathode of the thirty-second diode. The anode of the thirty-second diode is connected to the first terminal of the seventy-eighth capacitor, the seventh pin of the second relay, and the second signal input interface. The second terminal of the seventy-eighth capacitor and the fifth pin of the second relay are both connected to the second signal input interface. The eighth pin of the second relay is connected to the cathode of the thirty-first diode and the output terminal of the power processing unit, respectively.

7. The dual-gun DC charging pile controller according to claim 6, characterized in that, It also includes a current detection unit consisting of two sets of current detection circuits, each set of which includes: The sixth isolation amplifier, the fifteenth operational amplifier, the sixteenth operational amplifier, the thirty-third diode, the thirty-fourth diode, and the thirty-fifth diode; Resistor number 150, resistor number 151, resistor number 152, resistor number 153, resistor number 154, resistor number 155, resistor number 156, resistor number 157, resistor number 158, resistor number 159, resistor number 160, resistor number 161; Capacitors number 79, 80, 81, 82, 83, 84, 85, 86, 87, and 88; The first end of the first 150 resistor is connected to the second signal input interface, the first end of the seventy-ninth capacitor, and the first end of the first 151 resistor, respectively. The second end of the first 151 resistor is connected to the first end of the first 152 resistor, the first end of the eightieth capacitor, and the third pin of the fifteenth operational amplifier, respectively. The second end of the first 150 resistors is connected to the second signal input interface, the second end of the 79th capacitor, the first end of the first 154 resistors, and the first end of the first 153 resistors, respectively. The second end of the first 154 resistors is grounded. The second end of the first 153 resistors is connected to the second end of the 80th capacitor, the second pin of the 15th operational amplifier, the first end of the first 155 resistors, and the first end of the 82nd capacitor, respectively. The eighth pin of the fifteenth operational amplifier is connected to the first terminal of the eighty-first capacitor and the output terminal of the power processing unit, respectively. The second terminal of the eighty-first capacitor is connected to the second terminal of the one hundred and fifty-second resistor and grounded. The first pin of the fifteenth operational amplifier is connected to the second terminal of the eighty-second capacitor, the second terminal of the one hundred and fifty-fifth resistor, and the fifth pin of the fifteenth operational amplifier, respectively. The sixth pin of the fifteenth operational amplifier is connected to the seventh pin of the fifteenth operational amplifier and the first end of the first 156th resistor. The second end of the first 156th resistor is connected to the first end of the eighty-third capacitor, the cathode of the thirty-third diode, and the second pin of the sixth isolation amplifier. The second end of the eighty-third capacitor is connected to the anode of the thirty-third diode, the third pin of the sixth isolation amplifier, and the fourth pin of the sixth isolation amplifier and grounded. The first pin of the sixth isolation amplifier is connected to the output terminal of the power processing unit and the first terminal of the eighty-fourth capacitor, respectively, and the second terminal of the eighty-fourth capacitor is grounded. The eighth pin of the sixth isolation amplifier is connected to the output terminal of the power processing unit and the first terminal of the eighty-fifth capacitor, respectively, and the second terminal of the eighty-fifth capacitor is grounded. The seventh pin of the sixth isolation amplifier is connected to the first end of the first 157 resistor. The second end of the first 157 resistor is connected to the first end of the first 159 resistor, the first end of the 86th capacitor, and the fifth pin of the sixteenth operational amplifier. The second end of the first 159 resistor is connected to the second end of the 86th capacitor and the anode of the 34th diode and grounded. The sixth pin of the sixth isolation amplifier is connected to the first end of the first 158 ​​resistor. The second end of the first 158 ​​resistor is connected to the sixth pin of the sixteenth operational amplifier, the first end of the first 160 resistor, and the first end of the eighty-seventh capacitor. The second end of the eighty-seventh capacitor is connected to the second end of the first 160 resistor, the seventh pin of the sixteenth operational amplifier, and the first end of the first 161 resistor. The second end of the first 161 resistor is connected to the cathode of the thirty-fourth diode, the anode of the thirty-fifth diode, the first end of the eighty-eighth capacitor, and the input terminal of the control unit. The cathode of the thirty-fifth diode is connected to the output terminal of the power processing unit. The second end of the eighty-eighth capacitor is grounded.

8. The dual-gun DC charging pile controller according to claim 7, characterized in that, The control unit includes a main control circuit and a slave control circuit; The power supply terminal of the main control circuit and the power supply terminal of the slave control circuit are both connected to the output terminal of the power processing unit. The input terminal of the main control circuit is connected to the output terminal of the slave control circuit; The second input terminal of the main control circuit is connected to the output terminal of the temperature detection unit, the output terminal of the control guidance detection unit, the output terminal of the battery voltage detection unit, and the output terminal of the insulation detection unit, respectively. The output terminal of the main control circuit is connected to the control terminal of the insulation detection unit and the control terminal of the electromagnetic lock unit, respectively. The data transmission terminal of the main control circuit is connected to the first data transmission terminal of the Ethernet communication unit, the third data transmission terminal of the RS485 communication unit, the data transmission terminal of the 4G communication unit, the first data transmission terminal of the CAN communication unit, and the first data transmission terminal of the RS232 communication unit, respectively. The input terminal of the control circuit is connected to the second terminal of the CAN communication unit.

9. The dual-gun DC charging pile controller according to claim 8, characterized in that, The CAN communication unit includes 4 CAN communication circuits; The first data transmission terminal of the first CAN communication circuit and the first data transmission terminal of the second CAN communication circuit are the first terminals of the CAN communication unit. The first data transmission terminal of the first CAN communication circuit and the first data transmission terminal of the second CAN communication circuit are both connected to the data transmission terminal of the main control circuit. The first data transmission terminal of the third CAN communication circuit and the first data transmission terminal of the fourth CAN communication circuit are the second terminals of the CAN communication unit. The first data transmission terminal of the third CAN communication circuit and the first data transmission terminal of the fourth CAN communication circuit are both connected to the first data transmission terminal of the slave control circuit. The second data transmission terminal of all CAN communication circuits is connected to the communication interface; The power supply terminals of all CAN communication circuits are connected to the output terminal of the power processing unit.

10. The dual-gun DC charging pile controller according to claim 9, characterized in that, The RS485 communication unit includes two sets of RS485 communication circuits; The first data transmission terminal of all RS485 communication circuits is connected to the communication interface. The power supply terminals of all RS485 communication circuits are connected to the output terminal of the power processing unit. The second data transmission terminal of the first RS485 communication circuit is connected to the data transmission terminal of the main control circuit; The second data transmission terminal of the second RS485 communication circuit is connected to the third data transmission terminal of the RS232 communication unit.

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