An electric vehicle orderly charging control device, method and equipment

Abstract

The application discloses an electric vehicle orderly charging control device, method and equipment, the device comprises a front end load acquisition module, a vehicle charging pile, an orderly charging control module, a scheduling platform and a vehicle-mounted charging machine power receiving module; the first end of the front end load acquisition module and the first end of the vehicle charging pile are both externally connected to a power distribution network, the second end of the vehicle charging pile is connected to the vehicle-mounted charging machine power receiving module through the orderly charging control module; the second end of the front end load acquisition module is connected to the scheduling platform, and the orderly charging control module is in communication connection with the scheduling platform; the technical problem that the existing alternating current charging pile charging mode cannot automatically adjust the charging current and cannot meet the orderly charging demand of the electric vehicle is solved.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle charging technology, and in particular to an orderly charging control device, method and equipment for electric vehicles. Background Technology

[0002] With the rapid development of electric vehicles, the large-scale connection of electric vehicle charging facilities to the public power grid will have a strong impact on the power distribution network. If the capacity is fully met to meet the needs of conventional charging piles, it will result in a huge waste of power supply resources and make it difficult to fully meet the growing demand for electric vehicle charging.

[0003] Currently, the large-scale access of electric vehicles can easily cause overload tripping of power distribution areas and even electrical safety accidents. Therefore, under the current situation of vigorously promoting the large-scale development and market-oriented operation of electric vehicles, it is very necessary to carry out orderly charging management of charging facilities to ensure the safe and stable operation of power facilities. At present, ordinary AC charging piles cannot be directly upgraded to orderly control. Corresponding technical improvements are needed to enable them to have the function of orderly charging management.

[0004] Most existing AC charging piles determine the allowable input current of the on-board charger by detecting the resistance value of the built-in identification resistor and the PWM duty cycle. However, the resistance value of the built-in identification resistor and the PWM duty cycle are generally fixed before the charging pile leaves the factory and cannot automatically adjust the charging current, thus failing to meet the orderly charging needs of electric vehicles. Summary of the Invention

[0005] This invention provides an orderly charging control device, method, and equipment for electric vehicles, which solves the technical problem that existing AC charging piles cannot automatically adjust the charging current and thus cannot meet the orderly charging requirements of electric vehicles.

[0006] The first aspect of the present invention provides an electric vehicle orderly charging control device, which includes a front-end load acquisition module, an electric vehicle charging pile, an orderly charging control module, a scheduling platform, and an on-board charger power receiving module.

[0007] Both the first end of the front-end load acquisition module and the first end of the car charging pile are connected to the external power distribution network. The second end of the car charging pile is connected to the on-board charger power receiving module through the orderly charging control module.

[0008] The second end of the front-end load acquisition module is connected to the scheduling platform, and the orderly charging control module is communicatively connected to the scheduling platform;

[0009] The front-end load acquisition module is used to acquire the power supply load data of the distribution network and transmit it to the dispatching platform;

[0010] The orderly charging control module is used to acquire the charging load data of the on-board charger receiving module and transmit it to the scheduling platform, and then generate a target PWM control signal and transmit it to the on-board charger receiving module according to the current adjustment command sent by the scheduling platform and the first PWM control signal transmitted by the car charging pile.

[0011] The scheduling platform is used to generate the current adjustment command based on the power supply load data, the charging load data and the preset target current control value, and transmit it to the orderly charging control module.

[0012] The on-board charger power receiving module is used to adjust the charging input current of the electric vehicle according to the target PWM control signal.

[0013] Optionally, the vehicle charging pile includes a circuit breaker, a protective ground wire, a vehicle charging control line, a power supply control module, a leakage current protector, a power supply terminal, a first switch, a first resistor, and a resistor switch module;

[0014] The circuit breaker is connected to the on-board charger power receiving module through the ordered charging control module, and the power supply terminal is connected to the on-board charger power receiving module through the protective ground wire;

[0015] The residual current device is connected to the protective ground wire, and the power supply terminal is grounded;

[0016] The first terminal of the resistor switch module is connected to the protective ground wire, and the second terminal of the resistor switch module is connected to the ordered charging control module.

[0017] The power supply control module is connected to the first terminal of the first switch and the second terminal of the first resistor, respectively, and the first terminal of the first resistor is connected to the second terminal of the first switch.

[0018] The second end of the first resistor is connected to the orderly charging control module via the vehicle charging control line;

[0019] The power supply control module is used to generate the first PWM control signal and transmit it to the ordered charging control module.

[0020] Optionally, the resistor switch module includes a second resistor, a third resistor, and a second switch;

[0021] The third resistor is connected in parallel with the second switch, and the first terminal of the second switch is connected to the protective ground wire.

[0022] The second terminal of the second switch is connected to the first terminal of the second resistor, and the second terminal of the second resistor is connected to the ordered charging control module.

[0023] Optionally, the orderly charging control module includes a data acquisition unit, three-phase lines, an MCU control unit, a communication display unit, and a current regulation module;

[0024] The circuit breaker is connected to the on-board charger power receiving module via the three-phase line, and the MCU control unit is connected to the communication display unit;

[0025] The first terminal of the data acquisition unit is connected to the second terminal of the second resistor, and the MCU control unit is connected to the second terminal of the data acquisition unit;

[0026] The MCU control unit is connected to the on-board charger power receiving module;

[0027] The current regulation module is connected to the second end of the first resistor and the on-board charger power receiving module via the vehicle charging control line.

[0028] The MCU control unit is communicatively connected to the current regulation module through the communication display unit;

[0029] The data acquisition unit is used to acquire the charging load data of the on-board charger power receiving module and transmit it to the scheduling platform;

[0030] The MCU control unit is used to transmit the received current adjustment command to the current adjustment module;

[0031] The current regulation module is used to generate a target PWM control signal and transmit it to the on-board charger power receiving module according to the current regulation command and the first PWM control signal sent by the power supply control module.

[0032] Optionally, the current regulation module includes a first diode, a second diode, a first high-low level conversion unit, a second high-low level conversion unit, and a PWM duty cycle regulation unit;

[0033] The first end of the first diode is connected to the second end of the first resistor and the first end of the second diode respectively through the vehicle charging control line, and the second end of the first diode is connected to the first end of the first high-low level conversion unit.

[0034] The second terminal of the first high-low level conversion unit and the second high-low level conversion unit are both connected to the PWM duty cycle adjustment unit.

[0035] The first terminal of the second high-low level conversion unit is connected to the second terminal of the second diode and the on-board charger power receiving module respectively through the vehicle charging control line;

[0036] The MCU control unit is communicatively connected to the PWM duty cycle adjustment unit through the communication display unit;

[0037] The first high-low level conversion unit is used to convert the level of the received first PWM control signal, generate a low-level PWM control signal and transmit it to the PWM duty cycle adjustment unit;

[0038] The PWM duty cycle adjustment unit is used to generate a second PWM control signal according to the received adjustment current command, and superimpose it with the low-level PWM control signal to generate an initial PWM control signal and transmit it to the second high-low level conversion unit.

[0039] The second high-low level conversion unit is used to perform level conversion on the initial PWM control signal, generate the target PWM control signal, and transmit it to the on-board charger power receiving module.

[0040] Optionally, the scheduling platform is specifically used for:

[0041] When the power supply load data and the charging load data are received, the power supply current value in the power supply load data is subtracted from the preset target current control value to determine the current control quantity.

[0042] Compare the current controlled quantity with the charging current value in the charging load data;

[0043] If the controlled current is less than the charging current value, an adjustment current command corresponding to the controlled current is generated and transmitted to the MCU control unit.

[0044] Optionally, the on-board charger power receiving module includes an on-board charger, a vehicle controller, an on-board terminal, a fourth resistor, a fifth resistor, and a third switch;

[0045] The circuit breaker is connected to the on-board charger via the three-phase line, and one end of the vehicle controller is connected to the MCU control unit.

[0046] The other end of the vehicle controller is connected to the first end of the second high-low level conversion unit, the second end of the fifth resistor, and the second end of the fourth resistor respectively via the vehicle charging control line;

[0047] The first end of the fourth resistor is connected to the second end of the third switch, and the first end of the fifth resistor, the first end of the third switch, and the on-board charger are all connected to the protective ground wire.

[0048] The vehicle-mounted terminal is connected to the power supply terminal via the protective ground wire, and the vehicle-mounted terminal is grounded.

[0049] The on-board charger is used to adjust the charging input current of the electric vehicle according to the target PWM control signal.

[0050] The second aspect of this invention provides an orderly charging control method for electric vehicles, applied to the aforementioned orderly charging control device for electric vehicles, comprising:

[0051] Acquire power supply load data of the distribution network, charging load data of the on-board charger receiving module, and the first PWM control signal of the car charging pile;

[0052] Using the power supply load data, the charging load data, and the preset target current control value, an adjustment current command is generated;

[0053] Based on the current adjustment command and the first PWM control signal, the target PWM control signal is determined;

[0054] The charging input current of the electric vehicle is adjusted according to the target PWM control signal.

[0055] A third aspect of the present invention provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of the electric vehicle orderly charging control method as described in any of the preceding claims.

[0056] As can be seen from the above technical solutions, the present invention has the following advantages:

[0057] The first aspect of the technical solution of the present invention provides an orderly charging control device for electric vehicles. This device includes a front-end load acquisition module, a vehicle charging pile, an orderly charging control module, a dispatching platform, and an on-board charger receiving module. The first end of the front-end load acquisition module and the first end of the vehicle charging pile are both externally connected to the power distribution network. The second end of the vehicle charging pile is connected to the on-board charger receiving module through the orderly charging control module. The second end of the front-end load acquisition module is connected to the dispatching platform, and the orderly charging control module is communicatively connected to the dispatching platform. The front-end load acquisition module acquires power supply load data from the power distribution network and transmits it to the dispatching platform. The orderly charging control module acquires the charging load data from the on-board charger receiving module and transmits it to the dispatching platform. Then, based on the current adjustment command sent by the dispatching platform and the first PWM control signal sent by the vehicle charging pile, it generates a target PWM control signal and transmits it to the dispatching platform. The power is supplied to the on-board charger receiving module; the scheduling platform generates an adjustment current command based on the power supply load data, charging load data, and preset target current control value, and transmits it to the orderly charging control module; the on-board charger receiving module adjusts the charging input current of the electric vehicle according to the target PWM control signal; the above scheme, through the scheduling platform generating an adjustment current command based on the received power supply load data, charging load data, and preset target current control value and transmitting it to the orderly charging control module, and then through the orderly charging control module generating a target PWM control signal based on the adjustment current command and the first PWM control signal, and the on-board charger receiving module adjusting the charging input current of the electric vehicle according to the target PWM control signal, can automatically adjust the charging input current of the electric vehicle based on data such as power supply load data and charging load data, thereby meeting the orderly charging requirements of the electric vehicle.

[0058] The second aspect of the above-mentioned technical solution of the present invention provides an orderly charging control method for electric vehicles. First, it acquires power supply load data from the distribution network, charging load data from the on-board charger's receiving module, and a first PWM control signal from the charging pile. Next, it generates an adjustment current command using the power supply load data, charging load data, and a preset target current control value. Based on the adjustment current command and the first PWM control signal, it determines a target PWM control signal. Finally, it adjusts the charging input current of the electric vehicle according to the target PWM control signal. This method, by determining the target PWM control signal based on the power supply load data, charging load data, and the first PWM control signal, and then adjusting the charging input current of the electric vehicle according to the target PWM control signal, achieves automatic adjustment of the charging input current of the electric vehicle, thereby meeting the orderly charging requirements of electric vehicles. Attached Figure Description

[0059] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0060] Figure 1 This is a schematic diagram of the structure of an electric vehicle orderly charging control device provided in Embodiment 1 of the present invention;

[0061] Figure 2 A schematic diagram of the connection structure of the car charging pile, the orderly charging control module and the on-board charger power receiving module provided in Embodiment 1 of the present invention;

[0062] Figure 3 This is a flowchart illustrating the steps of an orderly charging control method for electric vehicles provided in Embodiment 2 of the present invention.

[0063] The meanings of the labels in the attached figures are as follows:

[0064] 10. Front-end load acquisition module; 11. Orderly charging control module; 12. Dispatch platform; 13. Car charging pile; 14. On-board charger power receiving module; 110. MCU control unit; 111. Current regulation module; 112. Communication unit; 113. Display unit; 114. Data acquisition unit. Detailed Implementation

[0065] This invention provides an electric vehicle orderly charging control device, method, and equipment to solve the technical problem that existing AC charging piles cannot automatically adjust the charging current and thus cannot meet the orderly charging requirements of electric vehicles.

[0066] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0067] With the rapid development of electric vehicles, the large-scale connection of electric vehicle charging facilities to the public power grid will have a strong impact on the distribution network. If the capacity is fully met to meet the demand of conventional charging piles, it will result in a huge waste of power supply resources. Especially for older residential areas, the configuration of distribution transformers and lines has not taken into account the load of electric vehicles, making it difficult to fully meet the ever-increasing demand for electric vehicle charging. Moreover, the large-scale connection of electric vehicles can easily cause overload tripping of distribution transformer areas and even electrical safety accidents. Therefore, under the current situation of vigorously promoting the large-scale development and market-oriented operation of electric vehicles, it is very necessary to carry out orderly charging management of charging facilities to ensure the safe and stable operation of power facilities. At present, ordinary AC charging piles cannot be directly upgraded to orderly control and require corresponding technical improvements to have the function of orderly charging management. Therefore, this invention provides an electric vehicle orderly charging control device, method and equipment that can automatically adjust the charging input current of electric vehicles, thereby meeting the orderly charging needs of electric vehicles.

[0068] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an electric vehicle orderly charging control device provided in Embodiment 1 of the present invention.

[0069] This invention provides an electric vehicle orderly charging control device, which includes a front-end load acquisition module 10, a car charging pile 13, an orderly charging control module 11, a dispatching platform 12, and an on-board charger power receiving module 14; the first end of the front-end load acquisition module 10 and the first end of the car charging pile 13 are both connected to an external power distribution network, and the second end of the car charging pile 13 is connected to the on-board charger power receiving module 14 through the orderly charging control module 11; the second end of the front-end load acquisition module 10 is connected to the dispatching platform 12, and the orderly charging control module 11 is communicatively connected to the dispatching platform 12.

[0070] The front-end load acquisition module 10 is used to acquire power supply load data of the distribution network and transmit it to the dispatch platform 12;

[0071] Power supply load data includes power supply current, power supply voltage, and power supply power.

[0072] It should be noted that the front-end load acquisition module 10 is connected to the distribution network. The front-end load acquisition module 10 consists of a sampling transformer, a multi-function meter, a communication module, and a power supply module. The sampling transformer, the multi-function meter, and the communication module are connected in sequence. The power supply module is connected to the sampling transformer, the multi-function meter, and the communication module respectively. The sampling transformer acquires the load current data (power supply load data) of the transformer area line and transmits it to the multi-function meter. Then, the multi-function meter collects load current, voltage, and other data (power supply load data) and sends them to the dispatch platform 12 through the communication module.

[0073] The orderly charging control module 11 is used to acquire the charging load data of the on-board charger receiving module 14 and transmit it to the scheduling platform 12. Then, according to the current adjustment command sent by the scheduling platform 12 and the first PWM control signal transmitted by the car charging pile 13, it generates a target PWM control signal and transmits it to the on-board charger receiving module 14.

[0074] Charging load data includes charging current, charging voltage, and charging power.

[0075] It should be noted that the orderly charging control module 11 includes a data acquisition unit 114, a three-phase line, an MCU control unit 110, a communication display unit, and a current regulation module 111. First, the data acquisition unit 114 acquires the charging load data of the on-board charger in the on-board charger receiving module 14 and sends it to the dispatching platform. Then, the current regulation module 111 generates a second PWM control signal according to the current regulation command sent by the dispatching platform 12. Next, the first PWM control signal is level-converted to generate a low-level PWM control signal. The low-level PWM control signal and the second PWM control signal are superimposed to generate an initial PWM control signal. Finally, the initial PWM control signal is level-converted to generate a target PWM control signal and transmitted to the on-board charger receiving module.

[0076] For example, when the rated capacity of the connected charging pile is 30A, the first PWM control signal (amplitude of +6V) transmitted by the power supply control module has a duty cycle of 50%. The current adjustment command transmitted by the MCU control unit 110 carries the content of adjusting the target current to 18A output (its corresponding duty cycle mapping value is 30%). Therefore, the PWM duty cycle adjustment unit in the current adjustment module 111 generates a signal with the same frequency, reverse amplitude (-6V) and a duty cycle of 20% on the basis of 50%, which is the second PWM control signal. After the low-level PWM control signals obtained by level conversion are superimposed, the initial PWM control signal is generated. Then, the initial PWM control signal is level converted to generate the target PWM control signal in the form of a high level, that is, a signal with an equivalent duty cycle of 30% (amplitude of +6V), which is sent to the on-board charger in the on-board charger receiving module, and the output current is 18A.

[0077] The scheduling platform 12 is used to generate current adjustment commands based on power supply load data, charging load data and preset target current control values ​​and transmit them to the orderly charging control module 11.

[0078] It should be noted that the controlled current value is determined by subtracting the power supply current value from the power supply load data and the preset target current control value; the controlled current value is compared with the charging current value in the charging load data; if the controlled current value is less than the charging current value, an adjustment current command corresponding to the controlled current value is generated and transmitted to the MCU control unit.

[0079] For example, assuming a home charging pile has a power of 7kW, an operating voltage of 220V, and an operating current of approximately 32A, that is, the charging current value in the charging load data is approximately 32A, the charging voltage value is 220V, and the charging power is 7kW; the front-end load acquisition module 10 is installed on a low-voltage outgoing line A-phase line in the distribution substation. Assuming the dispatch platform 12 sets the preset target control value (preset target current control value) for this A-phase line to 200A, its operation is as follows:

[0080] If the power supply current value in the power supply load data received by the dispatch platform 12 is 100A and the power supply voltage value is 220V, then the calculated current control quantity (controlled quantity) is 100A (controlled quantity = preset target current control value 200A - load current 100A). Compare the current control quantity with the charging current value in the charging load data. When the controlled quantity is greater than or equal to the charging pile operating current (charging current value) of 32A, generate the current adjustment command "No need to adjust charging current".

[0081] If the power supply load data received by the dispatch platform 12 shows a power supply current value of 185A and a power supply voltage value of 220V, then the current control quantity is 15A (control quantity = preset target current control value 200A - load current 185A). The current control quantity is compared with the charging current value in the charging load data. When the control quantity is less than the charging pile operating current of 32A, an adjustment current command is generated: "Adjust the charging current to be lower than 15A".

[0082] The on-board charger power receiving module is used to adjust the charging input current of the electric vehicle according to the target PWM control signal.

[0083] It should be noted that when the on-board charger in the on-board charger power receiving module 14 receives the target PWM control signal, the on-board charger adjusts the maximum allowable input current (charging input current) during charging according to the target PWM control signal.

[0084] As a further improvement, the car charging pile 13 includes a circuit breaker, a protective ground wire, a vehicle charging control line, a power supply control module, a leakage current protector, a power supply terminal, a first switch, a first resistor, and a resistor switch module. The circuit breaker is connected to the on-board charger receiving module 14 through the orderly charging control module 11, and the power supply terminal is connected to the on-board charger receiving module 14 through the protective ground wire. The leakage current protector is connected to the protective ground wire, and the power supply terminal is grounded. The first terminal of the resistor switch module is connected to the protective ground wire, and the second terminal of the resistor switch module is connected to the orderly charging control module. The power supply control module is connected to the first terminal of the first switch and the second terminal of the first resistor, respectively. The first terminal of the first resistor is connected to the second terminal of the first switch. The second terminal of the first resistor is connected to the orderly charging control module 11 through the vehicle charging control line. The power supply control module is used to generate a first PWM control signal and transmit it to the orderly charging control module 11.

[0085] It should be noted that the car charging pile 13 consists of a circuit breaker, a protective ground wire PE, a vehicle charging control line CP, a power supply control module, a leakage current protector, a power supply terminal (equipment grounding), a first switch S1, a first resistor R1, and a resistor switch module.

[0086] As a further improvement, the resistor switch module includes a second resistor, a third resistor, and a second switch; the third resistor is connected in parallel with the second switch, the first terminal of the second switch is connected to the protective ground wire; the second terminal of the second switch is connected to the first terminal of the second resistor, and the second terminal of the second resistor is connected to the ordered charging control module.

[0087] It should be noted that the resistor switch module consists of a second resistor R0, a third resistor R4, and a second switch S3.

[0088] As a further improvement, the orderly charging control module 11 includes a data acquisition unit 114, a three-phase line, an MCU control unit 110, a communication display unit, and a current regulation module 111; the circuit breaker is connected to the on-board charger receiving module 14 via the three-phase line, and the MCU control unit 110 is connected to the communication display unit; the first terminal of the data acquisition unit 114 is connected to the second terminal of the second resistor, and the MCU control unit 110 is connected to the second terminal of the data acquisition unit; the MCU control unit 110 is connected to the on-board charger receiving module 14; the current regulation module 111 is connected to the vehicle charging control line. The first resistor is not connected to the second terminal of the first resistor or the on-board charger receiving module 14; the MCU control unit 110 is connected to the current regulation module 111 through the communication display unit; the data acquisition unit 114 is used to acquire the charging load data of the on-board charger receiving module 14 and transmit it to the scheduling platform 12; the MCU control unit 110 is used to transmit the received current regulation command to the current regulation module 111; the current regulation module 111 is used to generate a target PWM control signal and transmit it to the on-board charger receiving module 14 according to the current regulation command and the first PWM control signal sent by the power supply control module.

[0089] Please see Figure 2 An orderly charging control module 11 is connected between the car charging pile 13 (AC charging head) and the on-board charger receiving module (AC charging socket) 14. The car charging pile 13 includes circuit breaker K1, circuit breaker K2, power supply control device, leakage protection device, and power supply end grounding (power supply end). The on-board charger receiving module 14 includes on-board charger, on-board end grounding (on-board end), and vehicle control device. The power supply control module of the car charging pile 13 is connected to switch S1 to select between the output voltage terminal and the PWM wave transmitting terminal of the power supply control device, thereby triggering the power supply control device to switch from DC connection state to PWM connection state. Circuit breaker K1 and circuit breaker K2 are connected to the on-board charger through the three-phase lines A phase line L1, B phase line L2, C phase line L3 and neutral line N. The power supply end grounding and the on-board end grounding are connected through the protective ground line PE. The power supply control module and the vehicle controller are connected through the vehicle charging control line CP.

[0090] Furthermore, the MCU control unit 110 is mainly used to transmit the current adjustment command sent by the scheduling platform 12 to the PWM duty cycle adjustment unit.

[0091] Furthermore, the communication display unit includes a display unit 113 and a communication unit 112. Both the display unit 113 and the communication unit 112 are connected to the MCU control unit 110. The communication unit 112 is used to transmit data between the MCU control unit 110 and the scheduling platform 12 and the PWM duty cycle adjustment unit. The display module 113 is used to receive and display the display information sent by the MCU control unit 110.

[0092] As a further improvement, the current regulation module 111 includes a first diode, a second diode, a first high-low level conversion unit, a second high-low level conversion unit, and a PWM duty cycle adjustment unit; the first terminal of the first diode is connected to the second terminal of the first resistor and the first terminal of the second diode respectively via the vehicle charging control line, and the second terminal of the first diode is connected to the first terminal of the first high-low level conversion unit; the second terminals of both the first and second high-low level conversion units are connected to the PWM duty cycle adjustment unit; the first terminal of the second high-low level conversion unit is connected to the second terminal of the second diode and the on-board charger receiving module 14 respectively via the vehicle charging control line. The MCU control unit 110 is connected to the PWM duty cycle adjustment unit via the communication display unit. The first high-low level conversion unit is used to convert the level of the received first PWM control signal, generate a low-level PWM control signal, and transmit it to the PWM duty cycle adjustment unit. The PWM duty cycle adjustment unit is used to generate a second PWM control signal according to the received adjustment current command, and superimpose it with the low-level PWM control signal to generate an initial PWM control signal and transmit it to the second high-low level conversion unit. The second high-low level conversion unit is used to convert the level of the initial PWM control signal, generate a target PWM control signal, and transmit it to the on-board charger power receiving module.

[0093] It should be noted that the current regulation module consists of a first diode, a second diode, a first high-low level conversion unit, a second high-low level conversion unit, and a PWM duty cycle adjustment unit. One end of the current regulation module 111 is connected to the power supply control module of the car charging pile 13 through the vehicle charging control line CP of the charging gun. That is, the first end of the first diode is connected to the second end of the first resistor in the car charging pile 13 through the vehicle charging control line CP, and the other end is connected to the on-board charger through the vehicle charging control line CP. That is, the first end of the second high-low level conversion unit is connected to the on-board charger in the on-board charger receiving module 14 through the vehicle charging control line.

[0094] Furthermore, the PWM duty cycle adjustment unit in the current adjustment module 111 uses the current adjustment command sent by the received MCU control unit 110 and the pre-built duty cycle mapping relationship to generate a duty cycle adjustment value signal (second PWM control signal) corresponding to the current adjustment command. It adjusts the duty cycle of the low-level PWM control signal obtained after level conversion processing to obtain the initial PWM control signal. Then, it performs level conversion on the initial PWM control signal through the second high-low level conversion to generate the target PWM control signal and sends it to the on-board charger so that the on-board charger adjusts the maximum allowable input current during charging according to the second PWM signal.

[0095] As a further improvement, the scheduling platform 12 is specifically used for:

[0096] When power supply load data and charging load data are received, the power supply current value in the power supply load data is subtracted from the preset target current control value to determine the current controlled quantity; the current controlled quantity is compared with the charging current value in the charging load data; if the current controlled quantity is less than the charging current value, an adjustment current command corresponding to the current controlled quantity is generated and transmitted to the MCU control unit 110.

[0097] As a further improvement, the on-board charger power receiving module 14 includes an on-board charger, a vehicle controller, an on-board terminal, a fourth resistor, a fifth resistor, and a third switch; the circuit breaker is connected to the on-board charger via a three-phase line, one end of the vehicle controller is connected to the MCU control unit 110; the other end of the vehicle controller is connected to the first end of the second high-low level conversion unit, the second end of the fifth resistor, and the second end of the fourth resistor via the vehicle charging control line; the first end of the fourth resistor is connected to the second end of the third switch, and the first end of the fifth resistor, the first end of the third switch, and the on-board charger are all connected to the protective ground wire; the on-board terminal is connected to the power supply terminal via the protective ground wire, and the on-board terminal is grounded; the on-board charger is used to adjust the charging input current of the electric vehicle according to the target PWM control signal.

[0098] It should be noted that the on-board charger power receiving module 14 consists of an on-board charger, a vehicle controller, an on-board terminal, a fourth resistor R2, a fifth resistor R3, and a third switch S2. The power supply control module and the vehicle controller are connected through the vehicle charging control line CP.

[0099] For comparison of technical effects, existing technologies can be referenced. Ordinary AC charging piles for electric vehicles, due to their internal mechanisms, cannot adjust or control the power output. Therefore, under actual working conditions, they can only operate at full power or stop working altogether. They also cannot actively adjust the output current of each phase of the load; the actual power output of the charging pile is determined by the charging demand from the vehicle's built-in on-board charger. Their working principle involves detecting the resistance value of the built-in identification resistor and the PWM duty cycle to determine the allowable input current of the on-board charger. However, the resistance value of the built-in identification resistor and the PWM duty cycle are generally fixed before the charging pile leaves the factory. Therefore, this type of disordered AC charging pile cannot actively change its power output during charging. In other words, existing AC charging piles cannot automatically adjust power and current output during charging. Meanwhile, existing ordered charging technologies mainly address incremental ordered charging demands by redesigning and re-layouting the AC charging system. These ordered charging technologies mostly involve technically modifying charging piles using energy routers, failing to address the needs of existing electric vehicle charging piles already in use.

[0100] To address the aforementioned issues, this application provides an orderly charging control device for electric vehicles. This device is installed between the charging head of a standard AC charging station and the charging socket of an electric vehicle. Based on real-time collected power grid load information and a pre-set management algorithm, it automatically adjusts the charging power and current to achieve orderly management of AC charging. Specifically, it automatically adjusts the charging current based on grid load information to meet the charging needs of the vehicle. Furthermore, the orderly charging control device proposed in this application has a simple structure and significantly reduces costs compared to traditional technological upgrades, providing a solution for existing standard charging stations and facilitating the implementation of orderly charging management.

[0101] In this embodiment of the invention, an orderly charging control device for electric vehicles is provided. The device includes a front-end load acquisition module, a vehicle charging pile, an orderly charging control module, a dispatching platform, and an on-board charger receiving module. The first end of both the front-end load acquisition module and the first end of the vehicle charging pile are externally connected to the power distribution network. The second end of the vehicle charging pile is connected to the on-board charger receiving module via the orderly charging control module. The second end of the front-end load acquisition module is connected to the dispatching platform, and the orderly charging control module is communicatively connected to the dispatching platform. The front-end load acquisition module acquires power supply load data from the power distribution network and transmits it to the dispatching platform. The orderly charging control module acquires the charging load data from the on-board charger receiving module and transmits it to the dispatching platform. Then, based on the current adjustment command sent by the dispatching platform and the first PWM control signal sent by the vehicle charging pile, it generates a target PWM control signal for transmission. The system connects to the on-board charger receiving module; the scheduling platform generates an adjustment current command based on the power supply load data, charging load data, and a preset target current control value, and transmits it to the orderly charging control module; the on-board charger receiving module adjusts the charging input current of the electric vehicle according to the target PWM control signal; the above scheme, through the scheduling platform generating an adjustment current command based on the received power supply load data, charging load data, and a preset target current control value, and transmitting it to the orderly charging control module, and then through the orderly charging control module generating a target PWM control signal based on the adjustment current command and the first PWM control signal, and the on-board charger receiving module adjusting the charging input current of the electric vehicle according to the target PWM control signal, can automatically adjust the charging input current of the electric vehicle based on data such as power supply load data and charging load data, thereby meeting the orderly charging requirements of the electric vehicle.

[0102] Please see Figure 3 , Figure 3 This is a flowchart illustrating the steps of an orderly charging control method for electric vehicles provided in Embodiment 2 of the present invention.

[0103] Step 301: Obtain the power supply load data of the distribution network, the charging load data of the on-board charger receiving module, and the first PWM control signal of the car charging pile.

[0104] In this embodiment, the power supply load data of the distribution network, the charging load data of the on-board charger receiving module, and the first PWM control signal of the car charging pile are acquired.

[0105] Step 302: Use power supply load data, charging load data and preset target current control value to generate adjustment current command.

[0106] Further, step 302 may include the following sub-steps:

[0107] S21. Subtract the power supply current value from the power supply load data and the preset target current control value to determine the controlled current quantity.

[0108] S22. Compare the charging current value in the controlled current quantity and the charging load data;

[0109] S23. If the controlled current is less than the charging current, generate an adjustment current command corresponding to the controlled current.

[0110] In this embodiment, power supply load data, charging load data, and preset target current control value are used to generate an adjustment current command.

[0111] Step 303: Determine the target PWM control signal based on the adjustment current command and the first PWM control signal.

[0112] In this embodiment, the target PWM control signal is determined based on the adjustment current command and the first PWM control signal.

[0113] Step 304: Adjust the charging input current of the electric vehicle according to the target PWM control signal.

[0114] In this embodiment, the charging input current of the electric vehicle is adjusted according to the target PWM control signal.

[0115] In this embodiment of the invention, an orderly charging control method for electric vehicles is provided. First, power supply load data from the distribution network, charging load data from the on-board charger's receiving module, and a first PWM control signal from the charging pile are acquired. Next, an adjustment current command is generated using the power supply load data, charging load data, and a preset target current control value. Based on the adjustment current command and the first PWM control signal, a target PWM control signal is determined. Finally, the charging input current of the electric vehicle is adjusted according to the target PWM control signal. This method, by determining the target PWM control signal based on the power supply load data, charging load data, and the first PWM control signal, and then adjusting the charging input current of the electric vehicle according to the target PWM control signal, achieves automatic adjustment of the charging input current of the electric vehicle, thereby meeting the orderly charging requirements of electric vehicles.

[0116] This invention also provides an electronic device, which includes a memory and a processor. The memory stores a computer program. When the computer program is executed by the processor, the processor executes the electric vehicle orderly charging control method as described in Embodiment 2 above.

[0117] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0118] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0119] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An orderly charging control device for electric vehicles, characterized in that, The device includes a front-end load acquisition module, a car charging pile, an orderly charging control module, a scheduling platform, and an on-board charger power receiving module. Both the first end of the front-end load acquisition module and the first end of the car charging pile are connected to the external power distribution network. The second end of the car charging pile is connected to the on-board charger power receiving module through the orderly charging control module. The second end of the front-end load acquisition module is connected to the scheduling platform, and the orderly charging control module is communicatively connected to the scheduling platform; The front-end load acquisition module is used to acquire the power supply load data of the distribution network and transmit it to the dispatching platform; The orderly charging control module is used to acquire the charging load data of the on-board charger receiving module and transmit it to the scheduling platform, and then generate a target PWM control signal and transmit it to the on-board charger receiving module according to the current adjustment command sent by the scheduling platform and the first PWM control signal transmitted by the car charging pile. The scheduling platform is used to generate the current adjustment command based on the power supply load data, the charging load data and the preset target current control value, and transmit it to the orderly charging control module. The on-board charger power receiving module is used to adjust the charging input current of the electric vehicle according to the target PWM control signal; The vehicle charging pile includes a circuit breaker, a protective ground wire, a vehicle charging control line, a power supply control module, a leakage current protector, a power supply terminal, a first switch, a first resistor, and a resistor switch module. The circuit breaker is connected to the on-board charger power receiving module through the ordered charging control module, and the power supply terminal is connected to the on-board charger power receiving module through the protective ground wire; The residual current device is connected to the protective ground wire, and the power supply terminal is grounded; The first terminal of the resistor switch module is connected to the protective ground wire, and the second terminal of the resistor switch module is connected to the ordered charging control module. The power supply control module is connected to the first terminal of the first switch and the second terminal of the first resistor, respectively, and the first terminal of the first resistor is connected to the second terminal of the first switch. The second end of the first resistor is connected to the orderly charging control module via the vehicle charging control line; The power supply control module is used to generate the first PWM control signal and transmit it to the ordered charging control module; The resistor switch module includes a second resistor, a third resistor, and a second switch; The third resistor is connected in parallel with the second switch, and the first terminal of the second switch is connected to the protective ground wire. The second terminal of the second switch is connected to the first terminal of the second resistor, and the second terminal of the second resistor is connected to the ordered charging control module. The orderly charging control module includes a data acquisition unit, three-phase lines, an MCU control unit, a communication display unit, and a current regulation module; The circuit breaker is connected to the on-board charger power receiving module via the three-phase line, and the MCU control unit is connected to the communication display unit; The first terminal of the data acquisition unit is connected to the second terminal of the second resistor, and the MCU control unit is connected to the second terminal of the data acquisition unit; The MCU control unit is connected to the on-board charger power receiving module; The current regulation module is connected to the second end of the first resistor and the on-board charger power receiving module via the vehicle charging control line. The MCU control unit is communicatively connected to the current regulation module through the communication display unit; The data acquisition unit is used to acquire the charging load data of the on-board charger power receiving module and transmit it to the scheduling platform; The MCU control unit is used to transmit the received current adjustment command to the current adjustment module; The current regulation module is used to generate a target PWM control signal and transmit it to the on-board charger power receiving module according to the current regulation command and the first PWM control signal sent by the power supply control module.

2. The electric vehicle orderly charging control device according to claim 1, characterized in that, The current regulation module includes a first diode, a second diode, a first high-low level conversion unit, a second high-low level conversion unit, and a PWM duty cycle regulation unit; The first end of the first diode is connected to the second end of the first resistor and the first end of the second diode respectively through the vehicle charging control line, and the second end of the first diode is connected to the first end of the first high-low level conversion unit. The second terminal of the first high-low level conversion unit and the second high-low level conversion unit are both connected to the PWM duty cycle adjustment unit. The first terminal of the second high-low level conversion unit is connected to the second terminal of the second diode and the on-board charger power receiving module respectively through the vehicle charging control line; The MCU control unit is communicatively connected to the PWM duty cycle adjustment unit through the communication display unit; The first high-low level conversion unit is used to convert the level of the received first PWM control signal, generate a low-level PWM control signal and transmit it to the PWM duty cycle adjustment unit; The PWM duty cycle adjustment unit is used to generate a second PWM control signal according to the received adjustment current command, and superimpose it with the low-level PWM control signal to generate an initial PWM control signal and transmit it to the second high-low level conversion unit. The second high-low level conversion unit is used to perform level conversion on the initial PWM control signal, generate the target PWM control signal, and transmit it to the on-board charger power receiving module.

3. The electric vehicle orderly charging control device according to claim 1, characterized in that, The scheduling platform is specifically used for: When the power supply load data and the charging load data are received, the power supply current value in the power supply load data is subtracted from the preset target current control value to determine the current control quantity. Compare the current controlled quantity with the charging current value in the charging load data; If the controlled current is less than the charging current value, an adjustment current command corresponding to the controlled current is generated and transmitted to the MCU control unit.

4. The electric vehicle orderly charging control device according to claim 2, characterized in that, The on-board charger power receiving module includes an on-board charger, a vehicle controller, an on-board terminal, a fourth resistor, a fifth resistor, and a third switch; The circuit breaker is connected to the on-board charger via the three-phase line, and one end of the vehicle controller is connected to the MCU control unit. The other end of the vehicle controller is connected to the first end of the second high-low level conversion unit, the second end of the fifth resistor, and the second end of the fourth resistor respectively via the vehicle charging control line; The first end of the fourth resistor is connected to the second end of the third switch, and the first end of the fifth resistor, the first end of the third switch, and the on-board charger are all connected to the protective ground wire. The vehicle-mounted terminal is connected to the power supply terminal via the protective ground wire, and the vehicle-mounted terminal is grounded. The on-board charger is used to adjust the charging input current of the electric vehicle according to the target PWM control signal.

5. A method for orderly charging control of electric vehicles, applied to the orderly charging control device for electric vehicles according to any one of claims 1 to 4, characterized in that, include: Acquire power supply load data of the distribution network, charging load data of the on-board charger receiving module, and the first PWM control signal of the car charging pile; Using the power supply load data, the charging load data, and the preset target current control value, an adjustment current command is generated; Based on the current adjustment command and the first PWM control signal, the target PWM control signal is determined; The charging input current of the electric vehicle is adjusted according to the target PWM control signal.

6. The electric vehicle orderly charging control method according to claim 5, characterized in that, The step of generating an adjustment current command using the power supply load data, the charging load data, and the preset target current control value includes: The controlled current quantity is determined by subtracting the power supply current value from the power supply load data from the preset target current control value. Compare the current controlled quantity with the charging current value in the charging load data; If the controlled current is less than the charging current value, an adjustment current command corresponding to the controlled current is generated.

7. An electronic device, characterized in that, The device includes a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor causes the processor to perform the steps of the electric vehicle orderly charging control method as described in any one of claims 5-6.

Images