Intelligent charging pile module with built-in charging control protocol capable of automatically identifying and annularly connecting and combining

Abstract

The invention discloses an intelligent charging pile module with a built-in charging control protocol capable of automatically identifying and annularly connecting and combining, and the module comprises a combined intelligent charging pile which is provided with a charging pile case. And a circuit breaker A, an AC220 controller, an annular connection port, an AC / DC module, a protection unit, a communication unit, a charging control unit, a protocol identification module, an AC contactor and a circuit breaker B. According to the combined intelligent charging pile, through an annular connection mode, the number of charging modules can be easily expanded or reduced, the charging requirements of different scenes are met, and the charging efficiency is improved. The annular connection structure has redundancy characteristics, when a certain module breaks down, the system can bypass the fault module to continue to operate, multi-mode charging is supported, high-power output or simultaneous charging of multiple vehicles can be selected according to actual conditions, and various charging requirements are met; real-time monitoring, intelligent load adjustment and fault diagnosis of the whole annular charging system are realized, and the operation and maintenance efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent charging piles, and in particular to an intelligent charging pile module with a built-in charging control protocol capable of automatically identifying a ring-connected combination. Background Art

[0002] As a green means of transportation with broad development prospects, electric vehicles will be popularized at an extremely rapid speed in the future, and the future market prospects are also extremely huge.

[0003] A charging pile, also known as an electric vehicle charging station or electric vehicle power supply equipment, is a device that provides electrical energy to electric vehicles, enabling them to store enough electricity to support their operation.

[0004] The input end of the charging pile is directly connected to the AC power grid, and the output end is equipped with a charging plug for charging electric vehicles. Charging piles generally provide two charging methods: conventional charging and fast charging. People can use a specific charging card to swipe the card on the human-computer interaction interface provided by the charging pile to perform corresponding charging operations and print cost data. The charging pile display can display data such as charging capacity, cost, and charging time.

[0005] The existing DC charging pile module has no charging control program and mainly relies on external controller software to control and identify different models. This method has the problems of high cost, slow response speed, poor compatibility, and inflexible charging power. Therefore, an improved technology is urgently needed to solve this problem in the existing technology. Summary of the invention

[0006] The purpose of the present invention is to provide a smart charging pile module with a built-in charging control protocol that can automatically identify a ring-connected combination, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a built-in charging control protocol can automatically identify a smart charging pile module that can be connected in a ring-shaped combination, including a combined smart charging pile, the combined smart charging pile is provided with a charging pile chassis and a CAN interface, adjacent combined smart charging piles are connected through the CAN interface and the ring connection interface to form a ring connection, so that a plurality of combined smart charging piles form a ring interconnection, and a plurality of combined smart charging piles support a parallel mode, a charging pile on the combined smart charging pile is independently connected to any charging pile in a set place by a cable, and a voltage controller and an automatic on-off switch are provided on the cable of two interconnected combined smart charging piles; The combined intelligent charging piles have a load balancing function after forming a ring connection, and automatically adjust the output power according to the load conditions of each combined intelligent charging pile.

[0008] Preferably, the combined intelligent charging pile is provided with a charging pile chassis, and the charging pile chassis is provided with a circuit breaker A, an AC220 controller, a ring connection port, an AC / DC module, a protection unit, a communication unit, a charging control unit, a protocol identification module, an AC contactor, and a circuit breaker B, and the other connection end of the circuit breaker B is provided with a charging gun; The protection unit includes an overvoltage protection unit, an overcurrent protection unit, a short circuit protection unit, a leakage protection unit, and a temperature monitoring unit; The communication unit supports standard CAN communication, Ethernet and wireless communication; The protocol identification module includes firmware for multiple charging protocols and automatically identifies the charging protocol type of the vehicle through the communication signal of the vehicle charging port.

[0009] Preferably, the combined intelligent charging pile is provided with two standardized annular connection interfaces, which support power transmission and data communication.

[0010] Preferably, the communication unit includes one or more of a wireless communication WIFI module, a 5G communication module, and a Bluetooth communication module.

[0011] Preferably, the overvoltage protection unit is provided with a resistor R1 and a resistor R2, the node between the resistor R1 and the resistor R2 is connected to the base of the transistor Q5, the emitter of the transistor Q5 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the emitter of the transistor Q6, the base of the transistor Q6 is connected to one end of the resistor R5, the other connecting end of the resistor R5 is connected to the voltage zener diode, the collector of the transistor Q5 is connected to one end of the resistor R4, the collector of the transistor Q6 is connected to one end of the sliding rheostat RP1, the other connecting end of the sliding rheostat RP1 is provided with a resistor R6, the other connecting end of the resistor R6 is provided with a resistor R7, and the collector of the transistor Q6 is also connected to the power supply BT.

[0012] Preferably, a transistor Q1 is provided on the overcurrent protection unit, the emitter of the transistor Q1 is connected to 12V, the collector of the transistor Q1 is connected to a resistor R9, the other connection end of the resistor R9 is grounded, the base of the transistor Q1 is connected to the emitter of the transistor Q2, the base of the transistor Q2 is connected to the node between the transistor Q1 and the resistor R9, a resistor R8 is provided between the transistor Q1 and the transistor Q2, one end of the resistor R8 is connected to the emitter of the transistor Q1, and the other end of the resistor R8 is connected to the emitter of the transistor Q2.

[0013] Preferably, the short-circuit protection unit is provided with a light-emitting diode LED, a resistor R10, and a transistor Q3, and the light-emitting diode LED, the resistor R10, and the transistor Q3 are connected in series, the emitter of the transistor Q3 is connected to the resistor R12, the other connecting end of the resistor R12 is provided with a resistor R14, the other connecting end of the resistor R14 is connected to the base of the transistor Q3, the node between the transistor Q3 and the resistor R12 is connected to the resistor R11, the other connecting end of the resistor R11 is connected to the collector of the transistor Q4, the base of the transistor Q4 is connected to the positive electrode of the diode D, the emitter of the transistor Q4 is connected to the resistor R13, and the other end of the resistor R13 is connected to a 5V voltage.

[0014] Preferably, the temperature monitoring unit is provided with resistors R13, R14 and R15, one end of the resistor R13 is connected to a 5V voltage, the other end of the resistor R13 is connected to one end of the resistor R14 and one end of the resistor R15, the other end of the resistor R15 is grounded, a polarity capacitor E6 is provided on one side of the resistor R15, one connection end of the resistor R14 is connected to the in-phase input end of the operational amplifier LM, the inverting output end of the operational amplifier LM is connected to resistor R16 and capacitor C1, one end of the resistor R16 is connected to resistor R17, the other end of the resistor R17 is connected to a 5V voltage, the other end of the resistor R16 is grounded, and the output end of the operational amplifier LM is provided with resistors R18 and R19, and resistors R18 and R19 are connected in parallel.

[0015] Preferably, the temperature monitoring unit is provided with a capacitor C2, a resistor R22, a light-emitting diode LED2, a resistor R23, and a light-emitting diode LED3. The resistors R22, the light-emitting diode LED2, the resistor R23, and the light-emitting diode LED3 are connected in series with each other, one connection end of the resistor R22 is connected to the resistor R20, the other end of the resistor R20 is connected to the resistor R21, the other connection end of the resistor R21 is connected to the cathode of the diode LED4, the anode of the diode LED4 is connected to the anode of the capacitor C3, the cathode of the capacitor C3 is grounded, the anode of the diode LED4 is also connected to the anode of the capacitor C2, and the temperature monitoring unit is provided with a CN module, the STAT end on the CN module is connected to the node between the light-emitting diode LED2 and the resistor R23, the CE end on the CN module is connected to the node between the resistor R22 and the resistor R20, and the LDRV end on the CN module is connected to the FET.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The combined intelligent charging pile is provided with a CAN interface. Adjacent combined intelligent charging piles are connected in a ring through the CAN interface and the ring connection interface to realize the ring interconnection of multiple combined intelligent charging piles. Multiple combined intelligent charging piles support parallel mode. After the combined intelligent charging piles form a ring connection, they have a load balancing function and automatically adjust the output power according to the load conditions of each combined intelligent charging pile 1. The ring connection interface is used to realize the ring interconnection between modules. The ring connection interface supports power transmission and data communication, and adopts a waterproof and dustproof design to ensure the stability and safety of the equipment; (2) The communication unit supports standard CAN communication, Ethernet, and wireless communication. The communication unit includes a wireless communication WIFI module, a 5G communication module, and a Bluetooth communication module. The communication unit realizes data exchange and system management between modules through a ring bus, supports real-time status monitoring and control signal transmission, supports standard CAN communication, Ethernet, and wireless communication, and realizes real-time interaction with the vehicle and background management system; (3) After the combined intelligent charging piles form a ring connection, they have a load balancing function, automatically adjusting the output power according to the load conditions of each combined intelligent charging pile, and adopting a combination of series and parallel design. At the same time, whether it is series or parallel, the cables used to connect the charging piles are equipped with voltage controllers and automatic on-off switches. When the series and parallel connections cannot reach the load power, the voltage controller can be used to boost the voltage while ensuring safety; (4) The combined intelligent charging pile can easily expand or reduce the number of charging modules through a ring connection to meet the charging needs of different scenarios. The ring connection structure has redundancy. When a module fails, the system can bypass the faulty module and continue to operate. It supports multi-mode charging and can select high-power output or charge multiple vehicles at the same time according to actual conditions to meet various charging needs. It can realize real-time monitoring, intelligent load adjustment and fault diagnosis of the entire ring charging system, thereby improving operation and maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the combinable intelligent charging pile of the present invention; Figure 2 This is a schematic diagram of the circuit of the combinable intelligent charging pile of the present invention; Figure 3 This is a schematic diagram of the protection unit structure of the present invention; Figure 4 This is a schematic diagram of the circuit structure of the overvoltage protection unit of the present invention; Figure 5 This is a schematic diagram of the circuit structure of the overcurrent protection unit of the present invention; Figure 6 This is a schematic diagram of the circuit structure of the short-circuit protection unit of the present invention; Figure 7 This is a schematic diagram of the circuit structure of the temperature monitoring unit of the present invention; Figure 8 It is a schematic diagram of the charging control circuit structure of the present invention.

[0018] In the figure: 1. Combined intelligent charging pile; 2. Charging pile chassis; 3. Circuit breaker A; 4. AC220 controller; 5. Ring connection port; 6. AC / DC module; 7. Protection unit; 8. Communication unit; 9. Charging control unit; 10. Protocol identification module; 11. AC contactor; 12. Circuit breaker B; 13. Overvoltage protection unit; 14. Overcurrent protection unit; 15. Short circuit protection unit; 16. Leakage protection unit; 17. Temperature monitoring unit. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 8 The present invention provides a technical solution: a smart charging pile module with a built-in charging control protocol that can automatically identify a ring-connected combination, including a combined smart charging pile 1, a charging pile chassis 2 is provided on the combined smart charging pile 1, and a circuit breaker A3, an AC220 controller 4, a ring connection port 5, an AC / DC module 6, a protection unit 7, a communication unit 8, a charging control unit 9, a protocol identification module 10, an AC contactor 11, and a circuit breaker B12 are provided inside the charging pile chassis 2, and a charging gun is provided at the other connection end of the circuit breaker B12.

[0021] The communication unit 8 supports standard CAN communication, Ethernet, and wireless communication. The communication unit 8 includes one or more of a wireless communication WIFI module, a 5G communication module, and a Bluetooth communication module. The communication unit 8 realizes data exchange and system management between modules through a ring bus, supports real-time status monitoring and control signal transmission, supports standard CAN communication, Ethernet, and wireless communication, and realizes real-time interaction with the vehicle and background management system.

[0022] The protocol identification module 10 includes firmware for a variety of charging protocols, and automatically identifies the charging protocol type of the vehicle through the communication signal of the vehicle charging port.

[0023] The combined intelligent charging pile 1 is provided with a charging pile chassis 2 and a CAN interface. Adjacent combined intelligent charging piles 1 are connected via the CAN interface and the ring connection interface to form a ring connection, so that multiple combined intelligent charging piles 1 form a ring interconnection. Multiple combined intelligent charging piles 1 support parallel mode. A charging pile on the combined intelligent charging pile 1 is independently connected to any charging pile in a set place by a cable. A voltage controller and an automatic on-off switch are arranged on the cable of two interconnected combined intelligent charging piles 1. The combined intelligent charging pile 1 has a load balancing function after forming a ring connection. The output power is automatically adjusted according to the load conditions of each combined intelligent charging pile 1. A combination of series and parallel design is adopted. At the same time, whether it is series or parallel charging piles, a voltage controller and an automatic on-off switch are arranged on the cable used for connection. When the load power cannot be reached by series or parallel connection, the voltage controller can be used to boost the voltage while ensuring safety.

[0024] In one embodiment, please refer to Figure 2. The ring interconnection described in this application means that after the circuit breakers corresponding to at least two combined smart charging piles are closed, by switching different combinations of opening and closing between multiple contacts KM7-1 and KM7-2, a closed circuit in series or parallel is formed between the combined smart charging piles that need to be connected to each other.

[0025] In one embodiment, there are five combined intelligent charging piles connected to each other. One of the charging piles is identified as being directly connected to the load, and the remaining charging piles are identified as being in an idle state. When the above-mentioned charging pile identified as being connected to the load is in a load imbalance state, the present application switches the on-off state of the relevant contacts so that the charging pile identified as being in a load imbalance state forms a series connection circuit with one or more of the remaining charging piles in an idle state to increase the total output power of the relevant circuits, so that the multiple charging piles connected in series jointly output electrical energy for the load, and the charging pile directly connected to the load and in a load imbalance state becomes a load balanced state.

[0026] In one embodiment, there are five combined intelligent charging piles connected to each other, wherein the first charging pile is identified as being directly connected to the first load and being in a load imbalance state, wherein the second charging pile is identified as being directly connected to the second load and being in a load balance state, and the remaining charging piles are identified as being in an idle state.

[0027] The present application switches the on-off state of the relevant contacts so that the first charging pile forms a parallel connection circuit with one or more charging piles in the idle state to increase the total output power of the relevant circuits, so that the multiple charging piles connected in parallel jointly output electrical energy to the first load, and the first charging pile becomes a load-balanced state.

[0028] In one embodiment, please refer to FIG. 2 , which schematically illustrates at least three charging piles. If one of the charging piles is identified as being directly connected to the load, and the charging pile is identified as being in a load imbalance state. When the charging pile needs to form a series connection circuit with one or more of the remaining charging piles in an idle state, the corresponding circuit breaker is controlled to close, and the contacts KM7-1 and KM7-2 corresponding to the charging pile identified as having an unbalanced load are both closed, and the contact KM7-1 corresponding to the relevant charging pile in an idle state is disconnected, and the contact KM7-2 is closed, so that the above-mentioned series connection circuit is formed.

[0029] In one embodiment, please refer to FIG. 2 , which schematically illustrates at least three charging piles. If one of the charging piles is identified as being directly connected to the load, and the charging pile is identified as being in a load imbalance state. When the charging pile needs to form a parallel connection circuit with one or more of the remaining charging piles in an idle state, the corresponding circuit breaker is controlled to close, and the contacts KM7-1 and KM7-2 corresponding to the charging pile identified as being in a load imbalance state are both closed, and the contact KM7-1 corresponding to the relevant charging pile in an idle state is closed, and the contact KM7-2 is disconnected, so that the above-mentioned parallel connection circuit is formed.

[0030] The protection unit 7 includes an overvoltage protection unit 13 , an overcurrent protection unit 14 , a short circuit protection unit 15 , a leakage protection unit 16 , and a temperature monitoring unit 17 .

[0031] The overvoltage protection unit 13 is provided with resistors R1 and R2. The node between resistors R1 and R2 is connected to the base of transistor Q5. The emitter of transistor Q5 is connected to one end of resistor R3. The other end of resistor R3 is connected to the emitter of transistor Q6. The base of transistor Q6 is connected to one end of resistor R5. The other connecting end of resistor R5 is connected to a voltage-stabilizing diode. The collector of transistor Q5 is connected to one end of resistor R4. The collector of transistor Q6 is connected to one end of a sliding rheostat RP1. The other connecting end of the sliding rheostat RP1 is provided with resistor R6. The other connecting end of resistor R6 is provided with resistor R7. The collector of transistor Q6 is also connected to a power supply BT. The overvoltage protection unit 13 steps down the high voltage to prevent the circuit from burning due to excessive voltage.

[0032] The overcurrent protection unit 14 is provided with a transistor Q1, the emitter of the transistor Q1 is connected to 12V, the collector of the transistor Q1 is connected to a resistor R9, the other connection end of the resistor R9 is grounded, the base of the transistor Q1 is connected to the emitter of the transistor Q2, the base of the transistor Q2 is connected to the node between the transistor Q1 and the resistor R9, a resistor R8 is provided between the transistor Q1 and the transistor Q2, one end of the resistor R8 is connected to the emitter of the transistor Q1, and the other end of the resistor R8 is connected to the emitter of the transistor Q2. The overcurrent protection unit 14 monitors the current size in the disease regulation circuit in real time.

[0033] The short-circuit protection unit 15 is provided with a light-emitting diode LED, a resistor R10, and a transistor Q3. The light-emitting diode LED, the resistor R10, and the transistor Q3 are connected in series. The emitter of the transistor Q3 is connected to the resistor R12. The other connection end of the resistor R12 is provided with a resistor R14. The other connection end of the resistor R14 is connected to the base of the transistor Q3. The node between the transistor Q3 and the resistor R12 is connected to the resistor R11. The other connection end of the resistor R11 is connected to the collector of the transistor Q4. The base of the transistor Q4 is connected to the positive electrode of the diode D. The emitter of the transistor Q4 is connected to the resistor R13. The other end of the resistor R13 is connected to a 5V voltage.

[0034] The temperature monitoring unit 17 is provided with resistors R13, R14 and R15. One end of the resistor R13 is connected to a 5V voltage, and the other end of the resistor R13 is connected to one end of the resistor R14 and one end of the resistor R15. The other end of the resistor R15 is grounded. A polarity capacitor E6 is provided on one side of the resistor R15. One connection end of the resistor R14 is connected to the non-inverting input end of the operational amplifier LM. The inverting output end of the operational amplifier LM is connected to a resistor R16 and a capacitor C1. One end of the resistor R16 is connected to a resistor R17. The other end of the resistor R17 is connected to a 5V voltage. The other end of the resistor R16 is grounded. The output end of the operational amplifier LM is provided with resistors R18 and R19. The resistors R18 and R19 are connected in parallel.

[0035] The temperature monitoring unit 17 is provided with a capacitor C2, a resistor R22, a light-emitting diode LED2, a resistor R23, and a light-emitting diode LED3. The resistors R22, the light-emitting diode LED2, the resistor R23, and the light-emitting diode LED3 are connected in series. One connection end of the resistor R22 is connected to the resistor R20, and the other end of the resistor R20 is connected to the resistor R21. The other connection end of the resistor R21 is connected to the cathode of the diode LED4, the anode of the diode LED4 is connected to the anode of the capacitor C3, the cathode of the capacitor C3 is grounded, and the anode of the diode LED4 is also connected to the anode of the capacitor C2. The temperature monitoring unit 17 is provided with a CN module, the STAT end on the CN module is connected to the node between the light-emitting diode LED2 and the resistor R23, the CE end on the CN module is connected to the node between the resistor R22 and the resistor R20, and the LDRV end on the CN module is connected to the FET.

[0036] Working process: The combined intelligent charging pile 1 is in the charging station, and multiple charging pile modules are combined through the CAN interface and the ring connection interface. Multiple combined intelligent charging piles 1 can be connected in series with cables, and each combined intelligent charging pile 1 is connected with a cable, so that the combined intelligent charging pile 1 currently in use and any other charging pile can realize a ring connection between modules. After the connection is completed, the system automatically detects the status of each module and performs initial configuration of power and load. The current combined intelligent charging pile 1 automatically identifies the combined intelligent charging pile 1 connected to it, and boosts the voltage of the combined intelligent charging pile 1 that is not in use and the currently connected combined intelligent charging pile 1. The charging pile detects the vehicle protocol type through the protocol identification module and automatically switches.

[0037] During the charging process, the system adjusts the power and the number of modules according to the battery status based on the vehicle demand and module load. The combined intelligent charging pile 1 adjusts the number of modules according to the power change during the charging process, and automatically adjusts the power output of each module to achieve efficient charging service. When a module fails, the system isolates the fault through a bypass ring connection to ensure the normal operation of the remaining modules. After charging is completed, the charging pile automatically cuts off the power and prompts the user.

[0038] The combined intelligent charging pile 1 can easily expand or reduce the number of charging modules through a ring connection to adapt to the charging needs of different scenarios. The ring connection structure has redundancy. When a module fails, the system can bypass the faulty module and continue to operate. It supports multi-mode charging and can select high-power output or simultaneous charging of multiple vehicles according to actual conditions to adapt to various charging needs, realize real-time monitoring, intelligent load adjustment and fault diagnosis of the entire ring charging system, and improve operation and maintenance efficiency.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A built-in charging control protocol capable of automatically identifying smart charging pile modules that can be connected in a ring-shaped manner, comprising a combined smart charging pile (1), characterized in that: The combined intelligent charging pile (1) is provided with a charging pile chassis (2) and a CAN interface. Adjacent combined intelligent charging piles (1) are connected via the CAN interface and the ring connection interface to form a ring connection, so that a plurality of combined intelligent charging piles (1) form a ring interconnection. The plurality of combined intelligent charging piles (1) support a parallel mode. A charging pile on the combined intelligent charging pile (1) is independently connected to any charging pile in a set location using a cable. A voltage controller and an automatic on / off switch are provided on the cable of two mutually connected combined intelligent charging piles (1); The combined intelligent charging piles (1) have a load balancing function after forming a ring connection, and automatically adjust the output power according to the load conditions of each combined intelligent charging pile (1).

2. According to claim 1, a built-in charging control protocol can automatically identify the smart charging pile modules that can be connected in a ring combination, characterized in that: A charging pile chassis (2) is provided on a combined intelligent charging pile (1), wherein a circuit breaker A (3), an AC220 controller (4), a ring connection port (5), an AC / DC module (6), a protection unit (7), a communication unit (8), a charging control unit (9), a protocol identification module (10), an AC contactor (11), and a circuit breaker B (12) are provided inside the charging pile chassis (2), and a charging gun is provided at the other connection end of the circuit breaker B (12); The protection unit (7) comprises an overvoltage protection unit (13), an overcurrent protection unit (14), a short circuit protection unit (15), a leakage protection unit (16), and a temperature monitoring unit (17); The communication unit (8) supports standard CAN communication, Ethernet and wireless communication; The protocol identification module (10) includes firmware for a plurality of charging protocols and automatically identifies the charging protocol type of the vehicle through the communication signal of the vehicle charging port.

3. According to claim 1, a built-in charging control protocol can automatically identify the smart charging pile modules that can be connected in a ring combination, characterized in that: The combined intelligent charging pile (1) is provided with two standardized annular connection interfaces, which support power transmission and data communication.

4. According to claim 2, a built-in charging control protocol can automatically identify the smart charging pile modules that can be connected in a ring combination, characterized in that: The communication unit (8) comprises one or more of a wireless communication WIFI module, a 5G communication module, and a Bluetooth communication module.

5. According to claim 2, a built-in charging control protocol can automatically identify the smart charging pile modules that can be connected in a ring combination, characterized in that: The overvoltage protection unit (13) is provided with a resistor R1 and a resistor R2, the node between the resistor R1 and the resistor R2 is connected to the base of the transistor Q5, the emitter of the transistor Q5 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the emitter of the transistor Q6, the base of the transistor Q6 is connected to one end of the resistor R5, the other connection end of the resistor R5 is cooperatively connected to a voltage stabilizing diode, the collector of the transistor Q5 is connected to one end of the resistor R4, the collector of the transistor Q6 is connected to one end of a sliding rheostat RP1, the other connection end of the sliding rheostat RP1 is provided with a resistor R6, the other connection end of the resistor R6 is provided with a resistor R7, and the collector of the transistor Q6 is also connected to a power supply BT.

6. According to claim 2, a built-in charging control protocol can automatically identify the smart charging pile modules that can be connected in a ring combination, characterized in that: The overcurrent protection unit (14) is provided with a transistor Q1, the emitter of the transistor Q1 is connected to 12V, the collector of the transistor Q1 is connected to a resistor R9, the other connection end of the resistor R9 is grounded, the base of the transistor Q1 is connected to the emitter of the transistor Q2, the base of the transistor Q2 is connected to the node between the transistor Q1 and the resistor R9, a resistor R8 is provided between the transistor Q1 and the transistor Q2, one end of the resistor R8 is connected to the emitter of the transistor Q1, and the other end of the resistor R8 is connected to the emitter of the transistor Q2.

7. According to claim 2, a built-in charging control protocol can automatically identify the smart charging pile modules that can be connected in a ring combination, characterized in that: The short-circuit protection unit (15) is provided with a light-emitting diode LED, a resistor R10, and a transistor Q3. The light-emitting diode LED, the resistor R10, and the transistor Q3 are connected in series. The emitter of the transistor Q3 is connected to the resistor R12. The other connection end of the resistor R12 is provided with a resistor R14. The other connection end of the resistor R14 is connected to the base of the transistor Q3. The node between the transistor Q3 and the resistor R12 is connected to a resistor R11. The other connection end of the resistor R11 is connected to the collector of the transistor Q4. The base of the transistor Q4 is connected to the positive electrode of the diode D. The emitter of the transistor Q4 is connected to the resistor R13. The other end of the resistor R13 is connected to a 5V voltage.

8. According to claim 2, a built-in charging control protocol can automatically identify the smart charging pile modules that can be connected in a ring combination, characterized in that: The temperature monitoring unit (17) is provided with a resistor R13, a resistor R14, and a resistor R15. One end of the resistor R13 is connected to a 5V voltage. The other end of the resistor R13 is connected to one end of the resistor R14 and one end of the resistor R15. The other end of the resistor R15 is grounded. A polar capacitor E6 is provided on one side of the resistor R15. One connection end of the resistor R14 is connected to the non-inverting input end of the operational amplifier LM. The inverting output end of the operational amplifier LM is connected to a resistor R16 and a capacitor C1. One end of the resistor R16 is connected to a resistor R17. The other end of the resistor R17 is connected to a 5V voltage. The other end of the resistor R16 is grounded. The output end of the operational amplifier LM is provided with resistors R18 and R19. The resistors R18 and R19 are connected in parallel.

9. According to claim 2, a built-in charging control protocol can automatically identify the smart charging pile modules that can be connected in a ring combination, characterized in that: The temperature monitoring unit (17) is provided with a capacitor C2, a resistor R22, a light emitting diode LED2, a resistor R23, and a light emitting diode LED3. The resistors R22, the light emitting diode LED2, the resistor R23, and the light emitting diode LED3 are connected in series. One connection end of the resistor R22 is connected to the resistor R20, and the other end of the resistor R20 is connected to the resistor R21. The other connection end of the resistor R21 is connected to the cathode of the diode LED4. The anode of the diode LED4 is connected to the anode of the capacitor C3. The cathode of the capacitor C3 is grounded. The anode of the diode LED4 is also connected to the anode of the capacitor C2. The temperature monitoring unit (17) is provided with a CN module. The STAT end of the CN module is connected to the node between the light emitting diode LED2 and the resistor R23. The CE end of the CN module is connected to the node between the resistor R22 and the resistor R20. The LDRV end of the CN module is connected to the FET.

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