Integrated multi-port hybrid charging pile and control method

Abstract

The invention relates to an integrated multi-port hybrid charging pile and a control method, the integrated multi-port hybrid charging pile comprises a control system and a plurality of charging branch modules, and the control system is electrically connected with each charging branch module; each charging branch module is provided with at least one charging loop, the power of the at least two charging loops is different, and each charging loop is provided with a charging port used for charging electric vehicles with different power; the control system is electrically connected with the charging loops with different powers and is used for monitoring the power of the charging loop of the current charging branch module; and if the control system monitors that the power of the charging loops of all the charging branch modules is greater than the limited power of the charging pile, controlling to close the charging loop with the minimum power of the current charging branch module. According to the invention, the problem of various charging pile doors of various vehicles of users at present is solved, and the charging strategies of various vehicles are optimized, so that the power grid configuration power is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of charging piles, and in particular relates to an integrated multi-port hybrid charging pile and a control method thereof. Background Art

[0002] In the current electric vehicle charging technology, the charging piles for four-wheel electric vehicles and two-wheel electric bicycles are not compatible and need to be built separately, and electric vehicle charging piles cannot charge electric bicycles, which results in ineffective utilization of charging pile resources.

[0003] Electric vehicle charging piles are usually one for each vehicle, and other vehicles cannot be charged while charging. However, users now have a variety of transportation tools, including electric vehicles, electric bicycles, electric scooters and other electric transportation tools, and all electric transportation tools involve charging issues.

[0004] The current charging pile solution can only meet the charging needs of a single means of transportation. If you want to charge multiple means of transportation, you must set up multiple charging piles. For example, if a family needs to charge electric cars, electric bicycles and electric scooters, then they must build three charging facilities, which increases the charging cost; and the charging capacity of the charging piles will also increase. For example, the charging power of electric vehicles is 7kW, the charging power of electric bicycles is 1.5kW, and the charging power of electric scooters is 500W. Then the user needs to configure a total charging power of 9kW. However, the instantaneous charging power of these three devices is not always at peak power, so the 9kW power configuration is a waste.

[0005] Based on the above problems, the present invention proposes an integrated multi-port hybrid charging pile and a control method. Summary of the invention

[0006] The purpose of the present invention is to provide an integrated multi-port hybrid charging pile. In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0007] An integrated multi-port hybrid charging pile comprises a control system and a plurality of charging branch modules, wherein the control system is electrically connected to each of the charging branch modules;

[0008] At least one charging circuit is provided on each of the charging branch modules, at least two of the charging circuits have different powers, and each of the charging circuits is provided with a charging port for charging electric vehicles of different powers;

[0009] The control system is electrically connected to the charging circuits of different powers and is used to monitor the power of the charging circuit of the current charging branch module; if the control system monitors that the power of the charging circuits of all charging branch modules is greater than the limited power of the charging pile, it controls the closing of the charging circuit with the lowest power of the current charging branch module.

[0010] Furthermore, each of the charging branch modules includes a main relay, a relay drive circuit, a current sampling circuit and an output voltage sampling circuit;

[0011] The main relay is connected to the current sampling circuit and the output voltage sampling circuit;

[0012] The input end of the relay drive circuit is connected to the control system, and the output end thereof is connected to the main relay;

[0013] The current sampling circuit and the output voltage sampling circuit are connected to the control system;

[0014] The main relay, the relay driving circuit, the current sampling circuit and the output voltage sampling circuit are connected to form a charging loop.

[0015] Furthermore, the control system includes a power supply, an analog quantity acquisition circuit, a metering circuit, a relay control circuit, a communication circuit and an MCU controller;

[0016] The power supply is electrically connected to the analog quantity acquisition circuit, the metering circuit, the relay control circuit, the communication circuit and the MCU controller, and the power supply is used to provide working power for the entire control system;

[0017] The analog quantity acquisition circuit input end is connected to the relay drive circuit, the current sampling circuit and the output voltage sampling circuit, and the analog quantity acquisition circuit output end is connected to the input end of the metering circuit. The analog quantity acquisition circuit is used to collect all analog quantity information in the charging branch module and transmit the collected analog quantity information to the metering circuit;

[0018] The output end of the metering circuit is connected to the input end of the MCU controller to calculate the charging power of the analog information;

[0019] The output end of the MCU controller is connected to the relay control circuit, and is used to control the relay control circuit to execute a control command according to the charging power;

[0020] One end of the communication circuit is connected to the MCU controller, and the other end thereof is connected to an external communication device for communicating with the external device.

[0021] Furthermore, it also includes an EMC lightning protection circuit module, a leakage detection circuit module, and an input voltage monitoring module;

[0022] The EMC lightning protection circuit module is connected to the power supply circuit of the control system;

[0023] The leakage detection circuit module is connected to the EMC lightning protection circuit module;

[0024] The input end of the input voltage monitoring module is connected to the leakage detection circuit module, and the output end of the input voltage monitoring module is connected to the plurality of charging branch modules.

[0025] Furthermore, the MCU controller includes a main control chip U, a board-level storage chip U and a control IO chip U;

[0026] The board-level storage chip U is connected to the main control chip U and is used to provide a storage medium for fault information and status records;

[0027] The main control chip U is connected to the control IO chip U and is used to perform level conversion on the output IO signal through the control IO chip.

[0028] Furthermore, the charging branch module adopts L and N dual relays as branch switch relays.

[0029] The present invention also provides a control method for an integrated multi-port hybrid charging pile, and the integrated multi-port hybrid charging pile of the present invention is applied, and the control method comprises the following steps:

[0030] Step 1: Monitor the electric energy entering the charging pile through the EMC lightning protection circuit module and the leakage detection circuit module;

[0031] Step 2: Input the monitored electric energy into the voltage monitoring module for monitoring the safe voltage range of the charging pile input;

[0032] Step 3: Distribute the electric energy monitored by the input voltage monitoring module to the corresponding charging branch modules of the charging pile;

[0033] Step 4: The control system continuously monitors the power consumption of each charging branch module;

[0034] Step 5: When the control system detects that the total power consumption of all charging branch modules exceeds the system limited power, the control system controls to close the charging circuit with the minimum power of the current charging branch module.

[0035] Furthermore, in step 5, before the control system controls to close the charging circuit with the lowest power of the current charging branch module, it also includes: when charging is nearly completed, and the power of the charging branch module with the lowest power has met the charging demand.

[0036] The present invention adopts the above technical solution, which has the following advantages:

[0037] The integrated multi-port hybrid charging pile and control method of the present invention are characterized in that the charging pile is provided with multiple charging branch modules, each charging branch module has at least one charging circuit, at least two charging circuits have different powers, each charging circuit is provided with a charging port, and the charging port is used to charge electric vehicles of different powers. The present invention reduces the types and number of charging piles, integrates the charging piles of electric vehicles, electric bicycles, and other electric vehicles into one, and different charging interfaces can be introduced through one charging pile to realize charging of multiple vehicles; and each charging port corresponds to an independent charging power circuit inside the charging pile, and all charging power circuits share a common control system. The control system can reasonably allocate the charging sequence according to the current power usage, thereby optimizing the instantaneous power of the charging system and saving the grid capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The figure is a schematic diagram of the charging pile structure in the prior art.

[0039] Figure 2 It is a schematic diagram of the internal wiring of the integrated multi-port hybrid charging pile of the present invention.

[0040] Figure 3 It is a schematic diagram of the multi-port charging structure of the integrated multi-port hybrid charging pile of the present invention.

[0041] Figure 4 It is a schematic diagram of the internal functions of the integrated multi-port hybrid charging pile of the present invention.

[0042] Figure 5 It is a schematic diagram of the internal circuit expansion of the integrated multi-port hybrid charging pile of the present invention.

[0043] Figure 6 This is a schematic diagram of the first metering chip of the integrated multi-port hybrid charging pile of the present invention.

[0044] Figure 7 It is a schematic diagram of the second metering chip of the integrated multi-port hybrid charging pile of the present invention.

[0045] Figure 8 It is a schematic diagram of the sampling circuits I1+ and I1- of the integrated multi-port hybrid charging pile of the present invention.

[0046] Fig. 9 It is a schematic diagram of the sampling circuit Va+ and Va- of the integrated multi-port hybrid charging pile of the present invention.

[0047] Fig.10 It is a schematic diagram of the main control chip U1 of the integrated multi-port hybrid charging pile of the present invention.

[0048] Fig.11 It is a schematic diagram of the board-level storage chip U2 of the integrated multi-port hybrid charging pile of the present invention.

[0049] Fig.12 It is a schematic diagram of the control IO chip U3 of the integrated multi-port hybrid charging pile of the present invention.

[0050] Fig.13 It is a schematic diagram of the crystal oscillator X3 of the integrated multi-port hybrid charging pile of the present invention.

[0051] Fig.14 It is a schematic diagram of the selection circuit of the integrated multi-port hybrid charging pile of the present invention.

[0052] Fig.15 It is a schematic diagram of the voltage stabilization circuit of the integrated multi-port hybrid charging pile of the present invention.

[0053] Fig.16 It is a schematic diagram of the decoupling capacitor of the integrated multi-port hybrid charging pile of the present invention.

[0054] Fig.17 It is a schematic diagram of the optocoupler circuit of the integrated multi-port hybrid charging pile of the present invention.

[0055] Fig.18 It is a schematic diagram of the lighting circuit of the integrated multi-port hybrid charging pile of the present invention.

[0056] Fig.19 It is a circuit schematic diagram of a test indicator light of an integrated multi-port hybrid charging pile of the present invention.

[0057] Fig. 20 It is a schematic diagram of a buzzer alarm circuit of an integrated multi-port hybrid charging pile of the present invention.

[0058] Fig.21 It is a schematic diagram of high-power branch current sampling principle of the integrated multi-port hybrid charging pile of the present invention.

[0059] Fig. 22 It is a schematic diagram of the low-power branch current sampling principle of the integrated multi-port hybrid charging pile of the present invention.

[0060] Fig.23 It is a control logic diagram of the integrated multi-port hybrid charging pile of the present invention.

[0061] The accompanying drawings are marked as follows: 1-control system, 101-power supply, 102-analog quantity acquisition circuit, 103-metering circuit, 104-relay control circuit, 105-communication circuit, 106-MCU controller, 2-charging branch module, 201-main relay, 202-relay drive circuit, 203-current sampling circuit, 204-output voltage sampling circuit, 3-EMC lightning protection circuit module, 4-leakage detection circuit module, 5-input voltage monitoring module. DETAILED DESCRIPTION

[0062] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0063] like Figure 1 As shown. In the prior art, if multiple vehicles need to be charged, multiple charging piles must be set up. For example, if a family needs to charge electric vehicles, electric bicycles, and electric scooters, three types of charging piles must be built, resulting in ineffective use of charging pile resources; and the charging capacity of the charging piles will also increase. For example, if the charging power of electric vehicles is 7kW, the charging power of electric bicycles is 1.5kW, and the charging power of electric scooters is 500W, then the user needs to configure a total charging power of 9kW. However, the instantaneous charging power of these three charging piles is not always at peak power, so the 9kW power configuration is relatively wasteful.

[0064] like Figure 2 The integrated multi-port hybrid charging pile provided by the present invention comprises a control system 1 and a plurality of charging branch modules 2; the control system 1 is electrically connected to each charging branch module 2; each charging branch module 2 is provided with at least one charging circuit, at least two charging circuits have different powers, and each charging circuit is provided with a charging port for charging electric vehicles of different powers; the control system is electrically connected to the charging circuits of different powers, and is used to monitor the power of the charging circuit of the current charging branch module 2; if the control system monitors that the power of the charging circuits of all the charging branch modules 2 is greater than the limited power of the charging pile, the control system controls to close the charging circuit with the smallest power of the current charging branch module 2.

[0065] like Figure 3The charging pile of the present invention reduces the types of charging piles, integrates the charging piles of electric vehicles, electric bicycles, and other electric vehicles, and realizes the charging of multiple vehicles through different charging interfaces introduced by one charging pile. Each charging port corresponds to an independent charging power circuit inside the charging pile, and all charging power circuits share a set of control systems. The control system can reasonably allocate the charging sequence according to the current power usage, thereby optimizing the instantaneous power of the charging system and saving the capacity of the power grid.

[0066] As an implementation method, Figure 4 The control system 1 is provided with three charging branch modules 2, and the three charging branch modules 2 are respectively connected with the charging circuit of the electric vehicle, the charging circuit of the electric bicycle and the charging circuit of other charging piles.

[0067] As another embodiment, Figure 5 As shown, the charging circuit of the charging branch module 2 is expanded, and a charging branch module is provided with multiple charging ports, each charging port corresponds to a charging circuit. The charging power circuit in the present invention adopts a modular design, and the number of different charging circuits can be flexibly configured, thereby realizing a variety of charging circuit combinations, which is convenient for flexible application on site.

[0068] like Figure 2 As shown. Specifically, each charging branch module 2 includes a main relay 201, a relay drive circuit 202, a current sampling circuit 203 and an output voltage sampling circuit 204; the main relay 201 is connected to the current sampling circuit 203 and the output voltage sampling circuit 204; the input end of the relay drive circuit 202 is connected to the control system 1, and its output end is connected to the main relay 201; the current sampling circuit 203 and the output voltage sampling circuit 204 are connected to the control system 1; the main relay 201, the relay drive circuit 202, the current sampling circuit 203 and the output voltage sampling circuit 204 together form a charging circuit. Different charging circuits can be added or reduced according to demand, the control system 1 is still shared, and the added charging circuits are still uniformly controlled by the control system 1 in the charging pile.

[0069] like Figure 2Specifically, the control system 1 includes a power supply 101, an analog quantity acquisition circuit 102, a metering circuit 103, a relay control circuit 104, a communication circuit 105 and an MCU controller 106; the power supply 101 is electrically connected to the analog quantity acquisition circuit 102, the metering circuit 103, the relay control circuit 104, the communication circuit 105 and the MCU controller 106, and the power supply is used to provide working power for the entire control system 1; the input end of the analog quantity acquisition circuit 102 is connected to the relay drive circuit 202, the current sampling circuit 203 and the output voltage sampling circuit 204, and the output end of the analog quantity acquisition circuit 102 is connected to the relay drive circuit 202, the current sampling circuit 203 and the output voltage sampling circuit 204. The analog quantity acquisition circuit is connected to the input end of the metering circuit 103, and is used to collect all analog quantity information in the charging branch module, and transmit the collected analog quantity information to the metering circuit; the output end of the metering circuit 103 is connected to the input end of the MCU controller 106, and is used to calculate the charging power of the analog quantity information; the output end of the MCU controller 106 is connected to the relay control circuit 104, and is used to control the relay control circuit to execute the control command according to the charging power; one end of the communication circuit 105 is connected to the MCU controller 106, and the other end is connected to an external communication device for communicating with the external device. The power supply circuit in the control system 1 is responsible for the power conversion of the control system and supplies power to the control system 1; the MCU is responsible for the control protection and communication protocol processing of the control system 1; the communication circuit 105 is responsible for external communication; the analog quantity acquisition circuit 102 is responsible for the acquisition and conversion of all analog quantities in the control system 1; the metering circuit 103 is responsible for calculating the power and electricity calculation of each charging branch; the relay control circuit 104 is responsible for sending the relay control signal.

[0070] As a preferred embodiment, the metering circuit 103 uses a dedicated metering chip, and each metering chip is configured with an external 8 MHz passive crystal oscillator.

[0071] Specifically, Figure 6-7 The metering circuit 103 is provided with a first metering chip and a second metering chip, and the first metering chip and the second metering chip are both RN8302B; Figure 6 As shown, the first metering chip is used to collect the voltage and current of the high-power charging branch; Figure 7 As shown, the second metering chip is used to collect the voltage and current of the low-power charging branch;

[0072] The voltage and current of the high-power charging branch are transmitted to the pin of the first metering chip through the voltage-dividing resistor. The first metering chip calculates the charging power, branch current, branch voltage and other electrical information of the high-power charging branch through the internal fixed calculation formula, and transmits it to the main control chip through the SPI bus.

[0073] Again Figure 6-7As shown. Further, crystal oscillator X2 and crystal oscillator X3 are crystal oscillators of the first metering chip and the second metering chip respectively, the twenty-second capacitor C69, the twenty-third capacitor C70, the twenty-fourth capacitor C73 and the twenty-fifth capacitor C74 are matching capacitors of crystal oscillator X2 and crystal oscillator X3, crystal oscillator X2 is connected to the Pin37 pin and the Pin35 pin of the first metering chip, and crystal oscillator X3 is connected to the Pin37 pin and the Pin35 pin of the second metering chip; the twenty-sixth capacitor C71, the twenty-seventh capacitor C72, the twenty-eighth capacitor C67, the twenty-ninth capacitor C68, the thirtieth capacitor C75, the thirty-first capacitor C76, the thirty-second capacitor C77 and the thirty-third capacitor C78 are internal power supply support capacitors of the first metering chip and the second metering chip respectively, and are all connected to the Pin37 pin of the first metering chip and the second metering chip.

[0074] Specifically, the fourteenth resistor R80 is a pull-up resistor for the first metering chip reset circuit, and the fifteenth resistor R81 is a pull-up resistor for the second metering chip reset circuit. The fourteenth resistor R80 and the fifteenth resistor R81 prevent interference signals from causing metering chip reset.

[0075] like Figure 8 As shown. Specifically, in the sampling circuits I1+ and I1-, the sixteenth resistor R85 and the seventeenth resistor R91 are sampling resistors for current sampling Hall output signals, which can convert the current signal output by the Hall into a voltage signal. The thirty-fourth capacitor C79 and the thirty-fifth capacitor C85 support and filter the converted voltage signal to avoid interference. Finally, the output voltages of the thirty-fourth capacitor C79 and the thirty-fifth capacitor C85 are directly sent to the Is1+ and Is1- pins of the metering chip. The present invention also provides five sampling circuits with the same configuration principle as the sampling circuits I1+ and I1-.

[0076] like Fig. 9 As shown. Specifically, in the sampling circuit Va+, Va-, the eighteenth resistor R84, the nineteenth resistor R90, the twentieth resistor R99, and the twenty-first resistor R102 are the voltage-dividing resistors of the Ua voltage, the thirty-sixth capacitor C84 and the thirty-seventh capacitor C93 support and filter the voltage after the voltage division, and the thirty-eighth capacitor C90 differentiates the voltage value after the voltage division of Ua, and finally sends it to the Vsa+, Vsa- pins of the metering chip. The present invention also provides two sampling circuits with the same configuration principle as the sampling circuits Va+, Va-.

[0077] Specifically, the integrated multi-port hybrid charging pile also includes an EMC lightning protection circuit module 3, a leakage detection circuit module 4 and an input voltage monitoring module 5; the EMC lightning protection circuit module 3 is connected to the power supply circuit of the control system 1, and the function of the EMC lightning protection circuit module is to protect the charging pile from damage by lightning and voltage surges; the leakage detection circuit module 4 is connected to the EMC lightning protection circuit module 3, and the leakage detection circuit module is used to monitor whether there is current leakage during the charging process of the charging pile; the input end of the input voltage monitoring module 5 is connected to the leakage detection circuit module 4, and its output end is connected to multiple charging branch modules 2. The input voltage monitoring module is responsible for monitoring the input voltage to ensure that the charging pile inputs a safe voltage range value. The input voltage monitoring module is used to prevent overvoltage or undervoltage conditions to protect the charging pile and the traffic equipment being charged.

[0078] Specifically, the MCU controller includes a main control chip U1, a board-level storage chip U2 and a control IO chip U3; the board-level storage chip U2 is connected to the main control chip U1 and is used to provide a storage carrier for fault information and status records; the main control chip U1 is connected to the control IO chip U3 and is used to perform level conversion on the output IO signal through the control IO chip. The MCU controller is also connected to a buzzer for alarm.

[0079] like Figure 10-12 The working circuit diagram and working principle of the main control system are as follows:

[0080] The model of the main control chip U1 of the MCU controller in the control system 1 is GD32F407, the model of the board-level storage chip U2 is 24LC512, and the model of the control IO chip U3 is SN74LVC4245APWR; the main control chip U1 is connected to the board-level storage chip U2 through the I2C bus, and the board-level storage chip U2 is used as a storage carrier for the fault information and status records of the charging pile; the main control chip U1 is used to convert the output IO signal by controlling the IO chip U3 to convert the 3.3V voltage signal into a 5V voltage signal.

[0081] like Fig.13 As shown, the crystal oscillator X3 is a 25MHz passive crystal oscillator, the first capacitor C14 and the second capacitor C15 are matching capacitors of the passive crystal oscillator, the pin4 pin and the Pin2 pin of the crystal oscillator X3 are grounded, the Pin1 pin of the crystal oscillator X3 is connected to the OSCIN pin of the main control chip U1, and the Pin3 pin of the crystal oscillator X3 is connected to the OSCOUT pin of the main control chip U1.

[0082] like Fig.14The first resistor R23 and the second resistor R24 ​​are boot selection resistors of the main control chip U1, connected to the boot0 terminal of the main control chip U1; the third resistor R25 and the third capacitor C17 are the reset pin high points of the main control chip U1 and maintain the circuit, playing the function of power-on reset of the main control chip U1.

[0083] like Fig.15 The fourth resistor R12 and the fourth capacitor C16 form an AD reference voltage stabilization circuit inside the main control chip U1, and the circuit is connected to the VREF+ pin of the main control chip U1 through the fourth resistor R12.

[0084] like Fig.16 The fifth capacitor C18, the sixth capacitor C19, the seventh capacitor C20, the eighth capacitor C21, the ninth capacitor C22, the tenth capacitor C23, the eleventh capacitor C24, the twelfth capacitor C25, the thirteenth capacitor C26, the fourteenth capacitor C27, the fifteenth capacitor C28, the sixteenth capacitor C29, the seventeenth capacitor C30, the eighteenth capacitor C31, the nineteenth capacitor C32, the twentieth capacitor C33 and the twenty-first capacitor C34 are 3.3V voltage stabilizing and decoupling capacitors of the control system, and are connected to the +3.3V pin of the main control chip U1 during the wiring process.

[0085] like Fig.17 As shown. The optocoupler circuit includes an optocoupler chip U4 and a transistor Q1. The optocoupler chip U4 uses the LTV-1009 model and the transistor Q1 uses the MMBT5551 model. The optocoupler chip U4 transmits the external IO signal to the transistor Q1 through optocoupler isolation. The C pole of the transistor Q1 is connected to the fifth resistor R33, and the B pole of the transistor Q1 is connected to the sixth resistor R37. The transistor Q1 circuit converts the external input IO level and sends it to the GPIO port of the main control chip U1. External emergency stop feedback is performed through this circuit.

[0086] like Fig.18 The seventh resistor R52, transistor Q3, and the eighth resistor R61 form a lighting circuit, the GPIO control signal of the main control chip U1 drives the transistor Q3 through the eighth resistor R61, the transistor Q3 is connected to the terminal P3, the terminal P3 is connected to the LED lamp, and the seventh resistor R52 plays a current limiting role on the LED lamp.

[0087] like Fig.19As shown. The ninth resistor R36, the tenth resistor R38, the eleventh resistor R41, the twelfth resistor R48, the diode D9, the diode D10, the diode D11 and the diode D12 form a control system test indicator circuit. The diode D9, the diode D10, the diode D11 and the diode D12 are respectively connected to the Test1_LED1, Test1_LED2, Test1_LED3 and Test1_LED4 pins of the main control chip U1 to facilitate control system debugging. The thirteenth resistor R57 is a pull-down resistor for the communication direction control pin. The thirteenth resistor R57 ensures that the communication direction is stable at the initial power-on stage. The thirteenth resistor R57 is connected to the UART0_EN and GND pins of the main control chip U1.

[0088] like Fig. 20 The buzzer device SPK1 is connected to the GPIO port of the main control chip U1, and the buzzer device SPK1 makes a warning buzzer sound.

[0089] Specifically, the charging branch module 2 uses L and N dual relays as branch switch relays to ensure that the charging system is completely electrically separated from the charged vehicle. The high-power charging branch uses a 40A breaking capacity relay, and the low-power charging branch uses a 10A breaking capacity relay; each relay drive coil is configured with a TVS tube as a turn-off voltage spike absorber, and each charging branch is configured with an NTC temperature sampling resistor; each charging branch is configured with a string of output voltage collection resistors.

[0090] like Fig.21 , 22 The working circuit diagram and working principle of the high-power charging branch are as follows:

[0091] The model of the main relay in the high-power charging branch is HF2150-1A-12DE, the model of the main relay driving MOS tube is DMN13H750S-7, and the TA0914 mutual inductor is selected as the high-power branch sampling Hall in the high-power charging branch to perform high-power branch current sampling.

[0092] The model of the main relay in the small power charging branch is HF32FV-G / 12-HSTF, the model of the main relay driving MOS tube in the small power charging branch is DMN13H750S-7, and the TA0914 mutual inductor is selected as the small power branch sampling Hall in the small power charging branch to perform small power branch current sampling.

[0093] The L input line of the high-power charging branch is first connected to the main relay HF2150-1A-12DE, the output line of the main relay is connected to the TA0914 current Hall, and the current Hall is connected to the output connector; the N input line of the high-power charging branch is connected to the main relay HF2150-1A-12DE, and the main relay HF2150-1A-12DE is connected to the output connector.

[0094] The L input line of the low-power charging branch is first connected to the main relay HF32FV-G / 12-HSTF, the output line of the main relay is connected to the TA0914 current Hall, and the current Hall is connected to the output connector; the N input line of the low-power charging branch is connected to the main relay HF32FV-G / 12-HSTF, and the main relay HF32FV-G / 12-HSTF is connected to the output connector.

[0095] like Fig.23 shown. Fig.23 This is the control logic diagram of the charging pile. After the charging pile starts charging, the control system will continuously monitor the charging power of the current charging branch. When the power of all charging branches is greater than the limited power of the charging pile, the MCU controller will actively close the charging branch with the lowest current power to meet the high-power load demand and prevent the total power of the charging pile from exceeding the total power limit of the control system. The reason for closing the minimum power branch at this time is that the smaller the power, the closer the charging is to the end, and the power has met the travel requirements.

[0096] The present invention provides a control method for an integrated multi-port hybrid charging pile, which uses the control system of the integrated multi-port hybrid charging pile of the present invention. The control method comprises the following steps:

[0097] Step 1: Monitor the electric energy entering the charging pile through the EMC lightning protection circuit module 3 and the leakage detection circuit module 4;

[0098] Step 2: Input the monitored electric energy into the voltage monitoring module 5 for monitoring the voltage range value of the charging pile input safety;

[0099] Step 3: According to the charging demand, the electric energy monitored by the input voltage monitoring module is distributed to the corresponding charging branch module 2 of the charging pile;

[0100] Step 4: The control system 1 continuously monitors the power consumption of each charging branch module 2;

[0101] Step 5: When the control system 1 detects that the total power consumption of all charging branch modules 2 exceeds the system limited power, the control system controls to close the charging circuit with the lowest power of the current charging branch module 2 to meet the high-power load demand and prevent the total power of the equipment from exceeding the system total power limit.

[0102] Specifically, before the control system controls to close the charging circuit with the lowest power of the current charging branch module 2, it also includes: when charging is nearly completed, and the power of the charging branch module 2 with the lowest power has met the charging demand.

[0103] The integrated multi-port hybrid charging pile machine control method provided by the present invention realizes charging of various vehicles by leading out different charging interfaces through one charging pile; each charging port corresponds to an independent charging power circuit inside the device, and all charging power circuits share a common control system, which solves the problem of a wide variety of charging piles for various vehicles currently used by users, and optimizes the charging strategies of various vehicles through the device's proprietary energy monitoring and allocation logic, thereby reducing the power grid configuration power.

Claims

1. An integrated multi-port hybrid charging pile, characterized in that: It comprises a control system (1) and a plurality of charging branch modules (2), wherein the control system (1) is connected to each of the charging branch modules (2); At least one charging circuit is provided on each of the charging branch modules (2), at least two of the charging circuits have different powers, and each of the charging circuits is provided with a charging port for charging electric vehicles of different powers; The control system (1) is electrically connected to the charging circuits of different powers and is used to monitor the power of the charging circuit of the current charging branch module (2); if the control system (1) detects that the power of the charging circuits of all the charging branch modules (2) is greater than the limited power of the charging pile, the charging circuit of the current charging branch module (2) with the lowest power is controlled to be closed.

2. The integrated multi-port hybrid charging pile according to claim 1, characterized in that: Each of the charging branch modules (2) comprises a main relay (201), a relay drive circuit (202), a current sampling circuit (203) and an output voltage sampling circuit (204); The main relay (201) is connected to a current sampling circuit (203) and an output voltage sampling circuit (204); The input end of the relay drive circuit (202) is connected to the control system (1), and the output end thereof is connected to the main relay (201); The current sampling circuit (203) and the output voltage sampling circuit (204) are both connected to the control system (1); The main relay (201), the relay drive circuit (202), the current sampling circuit (203) and the output voltage sampling circuit (204) are connected to form a charging loop.

3. The integrated multi-port hybrid charging pile according to claim 1 or 2, characterized in that: The control system (1) comprises a power supply (101), an analog quantity acquisition circuit (102), a metering circuit (103), a relay control circuit (104), a communication circuit (105) and an MCU controller (106); The power supply (101) is electrically connected to the analog quantity acquisition circuit (102), the metering circuit (103), the relay control circuit (104), the communication circuit (105) and the MCU controller (106) to supply power to them; The analog quantity acquisition circuit (102) input end is connected to the relay drive circuit (202), the current sampling circuit (203) and the output voltage sampling circuit (204); the analog quantity acquisition circuit (102) output end is connected to the input end of the metering circuit (103); the analog quantity acquisition circuit is used to acquire all analog quantity information in the charging branch module (2) and transmit the acquired analog quantity information to the metering circuit (103); The output end of the metering circuit (103) is connected to the input end of the MCU controller (106) and is used to convert analog quantity information into charging power; The output end of the MCU controller (106) is connected to the relay control circuit (104) and is used to control the relay control circuit (104) to execute a control command according to the charging power; One end of the communication circuit (105) is electrically connected to the MCU controller (106), and the other end thereof is electrically connected to an external communication device for communicating with the external device.

4. The integrated multi-port hybrid charging pile according to claim 3, characterized in that: It also comprises an EMC lightning protection circuit module (3), a leakage detection circuit module (4), and an input voltage monitoring module (5); the EMC lightning protection circuit module (3) is connected to the power supply circuit of the control system (1); the leakage detection circuit module (4) is connected to the EMC lightning protection circuit module (3); the input end of the input voltage monitoring module (5) is connected to the leakage detection circuit module (4), and the output end thereof is connected to the plurality of charging branch modules (2).

5. The integrated multi-port hybrid charging station according to claim 4, characterized in that: The MCU controller includes a main control chip U1, a board-level storage chip U2 and a control IO chip U3; the board-level storage chip U2 is connected to the main control chip U1 and is used to provide a storage carrier for fault information and status records; the main control chip U1 is connected to the control IO chip U3 and is used to perform level conversion on the output IO signal through the control IO chip.

6. The integrated multi-port hybrid charging station according to claim 5, characterized in that: The branch switch relay of the charging branch module (2) is a L and N double relay.

7. The control method of the integrated multi-port hybrid charging pile according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Monitor the electric energy entering the charging pile through the EMC lightning protection circuit module (3) and the leakage detection circuit module (4); Step 2: The monitored electric energy is input to the input voltage monitoring module (5) for monitoring the input safety voltage range value of the charging pile; Step 3: Distribute the electric energy monitored by the input voltage monitoring module (5) to the corresponding charging branch module (2) of the charging pile; Step 4: the control system (1) continuously monitors the power consumption of each of the charging branch modules (2); Step 5: When the control system (1) detects that the total power consumption of all charging branch modules (2) exceeds the system limited power, the control system controls to close the charging circuit with the lowest power of the current charging branch module (2).

8. The control method of the integrated multi-port hybrid charging pile according to claim 7, characterized in that: In step 5, before the control system (1) controls to close the charging circuit with the lowest power of the current charging branch module (2), it also includes: when charging is nearly completed, and the power of the charging branch module (2) with the lowest power has met the charging demand.

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