Interaction control method and system for charging pile and electric vehicle

Abstract

The invention provides an interaction control method and system for a charging pile and an electric vehicle, and the method comprises the steps: determining a target access state of the electric vehicle according to the signal change condition of an initial control signal outputted by the charging pile; the target access state is one of the following access states: a charging and discharging cooperative state, a three-phase charging state and a single-phase charging state; if the target access state is a charge-discharge cooperative state, controlling a relay switch unit corresponding to a live line set and a relay switch unit corresponding to a zero line set of the charging pile to be all closed, and outputting a first three-phase electric energy signal; the first phase power in the first three-phase electric energy signal is greater than the second phase power and the third phase power; and a first switch module corresponding to a discharging module and a second switch module corresponding to a charging module of the electric vehicle are controlled to be closed, so that the electric vehicle is discharged to external equipment in the charging process of the charging pile. The universality and adaptability of the charging pile can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of charging piles, and in particular to a method and system for interactive control of a charging pile and an electric vehicle. Background Art

[0002] With the increasing export of electric vehicles, different charging piles are being used to meet different charging power requirements. This has led to a wide variety of charging piles that are unable to meet the charging needs of different new energy vehicle owners. For example, if a new energy vehicle has an 11kW charging capacity and an in-vehicle 220V / 16A discharge function, if it is charged on an 11kW charging pile, the entire charging pile capacity will be used for discharge, resulting in an inability to charge the new energy vehicle, seriously affecting the user experience and reducing the utilization rate of the charging pile. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide an interactive control method and system for a charging pile and an electric vehicle, which can meet the needs of electric vehicles discharging to external devices while charging, improve the versatility and adaptability of the charging pile, and thus improve the utilization rate of the charging pile.

[0004] In a first aspect, an embodiment of the present application provides an interactive control method for a charging pile and an electric vehicle, wherein the charging pile includes a live wire set and a neutral wire set, the live wire set includes a first-phase live wire set, a second-phase live wire, and a third-phase live wire, the neutral wire set includes a first sub-neutral wire and a second sub-neutral wire, the first-phase live wire set includes a first sub-live wire and a second sub-live wire, the first sub-live wire, the second sub-live wire, the second-phase live wire, the third-phase live wire, the first sub-neutral wire, and the second sub-neutral wire are respectively connected to a relay switch unit, and the interactive control method includes: Determining a target access state of the electric vehicle based on a signal change of an initial control signal output by the charging pile; the target access state is one of the following access states: a charge-discharge coordinated state, a three-phase charging state, and a single-phase charging state; If the target access state is the charge-discharge coordinated state, the relay switch units corresponding to the live wire set and the relay switch units corresponding to the neutral wire set of the charging pile are controlled to be all closed to output a first three-phase power signal; the first phase power in the first three-phase power signal is greater than the second phase power and the first phase power is greater than the third phase power; Under the condition that the charging pile outputs the first three-phase power signal, the first switch module corresponding to the discharge module of the electric vehicle and the second switch module corresponding to the charging module are controlled to be all closed, so that the electric vehicle discharges to the external device during the charging process using the charging pile.

[0005] In an optional embodiment, the interactive control method further includes: If the target access state is a three-phase charging state, the relay switch units corresponding to one of the live wires in the first-phase live wire set, the second-phase live wire, the third-phase live wire, and one of the neutral wires in the neutral wire set of the charging pile are all controlled to be closed to output a second three-phase power signal; the first-phase power, the second-phase power, and the third-phase power in the second three-phase power signal are the same; Under the condition that the charging pile outputs the second three-phase power signal, the second switch module corresponding to the charging module of the electric vehicle is controlled to be closed, so that the electric vehicle uses the charging pile for three-phase charging.

[0006] In an optional embodiment, the interactive control method further includes: If the target access state is a single-phase charging state, controlling the relay switch units corresponding to the first-phase live wire set and the relay units corresponding to the neutral wire set of the charging pile to be all closed to output a single-phase power signal; Under the condition that the charging pile outputs the single-phase power signal, the second switch module corresponding to the charging module of the electric vehicle is controlled to be closed, so that the electric vehicle is charged in single phase using the charging pile.

[0007] In an optional embodiment, determining the target access state of the electric vehicle according to a signal change of an initial control signal output by the charging pile includes: Control the PWM generator of the charging pile to output an initial control signal, which is a reference signal with a voltage amplitude of 9V and a duty cycle of 96%; If the voltage amplitude of the initial control signal is adjusted to 6V and the duty cycle remains unchanged, it is determined that the target access state of the electric vehicle is the charge-discharge coordinated state; If the duty cycle of the initial control signal is adjusted to 26.7% and the voltage amplitude is adjusted to 6V, it is determined that the target access state of the electric vehicle is a three-phase charging state; If the duty cycle of the initial control signal is adjusted to 53.3% and the voltage amplitude is adjusted to 6V, it is determined that the target connection state of the electric vehicle is a single-phase charging state.

[0008] In an optional embodiment, the method further includes: After the first switch module corresponding to the discharge module of the electric vehicle and the second switch module corresponding to the charging module are all closed, the electric vehicle is controlled to enter the charging and discharging mode; wherein, the charging and discharging mode refers to a working mode in which a charging pile is used to charge at a charging power of 11kW and discharge to an external device at a discharge power of 3.5kW.

[0009] In a second aspect, an embodiment of the present application further provides an interactive control system for a charging pile and an electric vehicle, which executes the interactive control method described above, including a charging pile and an electric vehicle, wherein the charging pile is connected to the electric vehicle via a charging gun, the charging pile includes a charging circuit, a controller circuit, and a switch circuit, the charging circuit is connected to the electric vehicle via the switch circuit, and the controller circuit is connected to the switch circuit; The charging circuit includes a first-phase live wire set, a second-phase live wire, a third-phase live wire, a neutral wire set, a ground wire, and four output lines, wherein the first-phase live wire set, the second-phase live wire, the third-phase live wire, and the neutral wire set are respectively connected to one output line, the output line is used to be connected to the electric vehicle, and the ground wire is grounded; In which, the switching circuit includes six relay switching units; the first sub-live line in the first-phase live line set is connected to the first output line through the first relay switching unit, the second sub-live line in the first-phase live line set is connected to the first output line through the second relay switching unit, the second-phase live line is connected to the second output line through the third relay switching unit, the third-phase live line is connected to the third output line through the fourth relay switching unit, the first sub-neutral line in the neutral line set is connected to the fourth output line through the fifth relay switching unit, and the second sub-neutral line in the neutral line set is connected to the fourth output line through the sixth relay switching unit.

[0010] In an optional embodiment, the rated current-carrying capacity of the first-phase live wire set is greater than the rated current-carrying capacity of the second-phase live wire, and the rated current-carrying capacity of the first-phase live wire set is greater than the rated current-carrying capacity of the third-phase live wire, and the rated current-carrying capacity of the second-phase live wire is the same as the rated current-carrying capacity of the third-phase live wire.

[0011] In an optional embodiment, the cross-sectional area of ​​the first output line is greater than the cross-sectional area of ​​the second output line, and the cross-sectional area of ​​the first output line is greater than the cross-sectional area of ​​the third output line, and the cross-sectional area of ​​the first output line is the same as the cross-sectional area of ​​the fourth output line.

[0012] In an optional embodiment, the electric vehicle includes a charging module and a discharging module, the discharging module is connected to the first phase live wire set and the neutral wire set of the charging pile through a first switch module, and the charging module is connected to the first phase live wire set, the second phase live wire, the third phase live wire and the neutral wire set of the charging pile through a second switch module.

[0013] In an optional embodiment, the discharge module includes a 220V discharge port, the first switch module includes a first contactor switch unit and a second contactor switch unit, the first phase live wire set of the charging pile is connected to the 220V discharge port through the first contactor switch unit, and the neutral wire set of the charging pile is connected to the 220V discharge port through the second contactor switch unit; The charging module includes an on-board charger and a rechargeable battery, the second switch module includes a third contactor switch unit and a fourth contactor switch unit, the first phase live wire set, the second phase live wire, the third phase live wire and the neutral wire set of the charging pile are all connected to the on-board charger, and the on-board charger is connected to the rechargeable battery through the third contactor switch unit and the fourth contactor switch unit.

[0014] In a third aspect, an embodiment of the present application further provides an electronic device comprising: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor and the memory communicate through the bus, and when the machine-readable instructions are executed by the processor, the steps of the above-mentioned method for interactive control of a charging pile and an electric vehicle are performed.

[0015] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the above-mentioned method for interactive control of a charging pile and an electric vehicle are executed.

[0016] The interactive control method and system for charging piles and electric vehicles provided in the embodiments of the present application have at least the following technical effects: The target access state of the electric vehicle is determined based on the signal changes of the initial control signal, and targeted relay switch units and switch modules are controlled when the target access state is the charge-discharge coordinated state. This meets the need for electric vehicles to discharge to external devices while charging, enriches the use scenarios of charging piles, improves the richness of charging pile applications, and thus improves the utilization rate of charging piles. In addition, the charge-discharge coordinated function, three-phase charging function, and single-phase charging function can be integrated into a single charging pile to adapt to electric vehicles with different needs. Only one model of charging pile is needed to meet the charging needs of electric vehicles with various power levels in the market, solving the problem of a large number of charging pile models and improving the versatility and adaptability of charging piles.

[0017] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A flowchart of a method for interactive control between a charging pile and an electric vehicle provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of an interactive control system between a charging pile and an electric vehicle provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0020] Figure numerals: 10 - charging pile; 101 - charging circuit; 102 - controller circuit; 103 - switching circuit; 104 - charging gun; 20 - electric vehicle; 201 - first switch module; 202 - second switch module; 203 - 220V discharge port; 204 - rechargeable battery; 205 - on-board charger. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for which protection is claimed, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, each other embodiment obtained by those skilled in the art without making creative work falls within the scope of protection of the present application.

[0022] Research has found that with the increasing export of electric vehicles, different charging pile products are needed to meet different charging power requirements. This has led to a wide variety of charging pile products and an inability to meet the charging needs of different new energy vehicle owners. For example, if a new energy vehicle has an 11kW charging capacity and an in-vehicle 220V / 16A discharge function, if it is charged on an 11kW charging pile, the entire charging pile capacity will be used for discharge, resulting in an inability to charge the new energy vehicle, seriously affecting the user experience and reducing the utilization rate of the charging pile.

[0023] Based on this, an embodiment of the present application provides an interactive control method for a charging pile and an electric vehicle, which can meet the needs of electric vehicles discharging to external devices while charging, improve the versatility and adaptability of the charging pile, and thus improve the utilization rate of the charging pile.

[0024] See also Figure 1 , Figure 1 This is a flow chart of a method for interactive control of a charging pile and an electric vehicle provided in an embodiment of the present application. Figure 1 As shown in , the interactive control method provided by the embodiment of the present application includes: S101. Determine a target access state of the electric vehicle based on a signal change of an initial control signal output by the charging pile; the target access state is one of the following access states: a charge-discharge coordinated state, a three-phase charging state, and a single-phase charging state.

[0025] S102. If the target access state is the charge-discharge coordinated state, control the relay switch units corresponding to the live wire set and the relay switch units corresponding to the neutral wire set of the charging pile to be all closed to output a first three-phase power signal; the first phase power in the first three-phase power signal is greater than the second phase power and the first phase power is greater than the third phase power.

[0026] S103: Under the condition that the charging pile outputs the first three-phase power signal, control the first switch module corresponding to the discharge module of the electric vehicle and the second switch module corresponding to the charging module to be all closed, so that the electric vehicle discharges to the external device during charging using the charging pile.

[0027] In the above steps S101 to S103, the target access state of the electric vehicle is determined according to the signal change of the initial control signal, and targeted relay switch unit and switch module control is performed when the target access state is the charge-discharge coordinated state, which meets the needs of the electric vehicle to discharge to external devices while charging, enriches the use scenarios of the charging pile, improves the richness of the charging pile application, and thus improves the utilization rate of the charging pile; and the charge-discharge coordinated function, three-phase charging function and single-phase charging function can be integrated on one charging pile to adapt to electric vehicles with different needs, so that only one type of charging pile is needed to meet the charging needs of electric vehicles of various powers in the market, solves the problem of various charging pile models, and improves the versatility and adaptability of the charging pile.

[0028] The above steps S101 to S103 are exemplarily described below: In step S101, a target access state of the electric vehicle is determined based on a signal change of an initial control signal output by the charging pile; the target access state is one of the following access states: a charge-discharge coordinated state, a three-phase charging state, and a single-phase charging state; In this step, the initial control signal output by the charging pile is generated by the charging pile's PWM generator and is used for initial interaction with the electric vehicle to determine the electric vehicle's operating state. Signal changes, including changes in voltage amplitude and duty cycle, reflect the electric vehicle's response to the initial control signal, thereby determining the electric vehicle's target connection state. The target connection state refers to the operating mode the electric vehicle intends to enter after connecting to the charging pile, such as the coordinated charge-discharge state, three-phase charging state, or single-phase charging state.

[0029] Specifically, the initial control signal can be an electrical signal in a specific format, such as one containing information such as voltage and time period. For example, in the embodiment of the present application, the initial control signal refers to a reference signal with a voltage amplitude of 9V and a duty cycle of 96%. This initial control signal is transmitted to the electric vehicle via the charging gun of the charging pile. When the electric vehicle receives this signal, it processes the signal according to its own configuration and needs. The changes in the processed signal become the basis for determining the target access status.

[0030] Optionally, signal changes can be detected using a signal detection circuit within the charging pile. This detection circuit monitors the voltage amplitude and duty cycle of the initial control signal in real time and transmits the detection results to the charging pile controller. For example, upon detecting specific changes in the voltage amplitude and duty cycle, the charging pile controller can determine the target connection state of the electric vehicle based on pre-set rules.

[0031] Furthermore, when the charging pile outputs the initial control signal, if the electric vehicle can correctly identify and adjust the signal, the charging pile can determine the target access status of the electric vehicle by detecting the signal change.

[0032] In an optional embodiment, step S101 specifically includes: Step S1011: Control the PWM generator of the charging pile to output an initial control signal, where the initial control signal is a reference signal with a voltage amplitude of 9V and a duty cycle of 96%.

[0033] The PWM generator in the charging station is an electronic device that generates a pulse-width modulated signal. It controls the output signal by changing the duty cycle of the pulse signal. The electric vehicle responds to and adjusts this initial control signal based on its own situation.

[0034] For example, the PWM generator can use a dedicated integrated circuit chip. By programming and configuring the chip, the voltage amplitude and duty cycle of the output signal can be precisely controlled. For example, in an embodiment of the present application, the initial control signal output by the PWM generator is configured as a reference signal with a voltage amplitude of 9V and a duty cycle of 96%. This signal is transmitted to the charging gun through the internal circuit of the charging pile and then sent to the electric vehicle.

[0035] Step S1012: If the voltage amplitude of the initial control signal is adjusted to 6V and the duty cycle remains unchanged, it is determined that the target access state of the electric vehicle is the charge-discharge coordinated state.

[0036] Here, the voltage amplitude is adjusted to 6V with an unchanged duty cycle, signaling to the charging station that the EV supports the coordinated charge-discharge function. The charging station detects this signal change and determines the EV's target connection state based on pre-set rules.

[0037] Optionally, the signal detection circuit inside the charging pile monitors the voltage amplitude and duty cycle of the initial control signal in real time. When it is detected that the voltage amplitude changes from 9V to 6V and the duty cycle remains at 96%, the signal detection circuit transmits this information to the controller of the charging pile. The controller determines that the target access state of the electric vehicle is the charge-discharge coordinated state based on a pre-set logical judgment. For example, in actual applications, when an electric vehicle supports the charge-discharge coordinated function, its internal circuit will process the received initial control signal and adjust the voltage amplitude to 6V to indicate its own working mode to the charging pile. By adjusting the signal in the above manner, the charging pile can accurately determine that the target access state of the electric vehicle is the charge-discharge coordinated state.

[0038] Step S1013: If the duty cycle of the initial control signal is adjusted to 26.7% and the voltage amplitude is adjusted to 6V, it is determined that the target access state of the electric vehicle is the three-phase charging state.

[0039] Here, the initial control signal's duty cycle is adjusted to 26.7% and its voltage amplitude is adjusted to 6V. This is the characteristic signal that the EV is sending back to the charging station, indicating that it needs three-phase charging. The charging station detects this change and determines the EV's target connection state.

[0040] Specifically, when an electric vehicle requires three-phase charging, its control circuit adjusts the initial control signal's duty cycle to 26.7% and its voltage amplitude to 6V, and then feeds this back to the charging station. The charging station's signal detection circuit detects this signal change and transmits the information to the controller, which, based on pre-set rules, determines that the electric vehicle's target connection state is three-phase charging.

[0041] Furthermore, after the electric vehicle makes the above adjustment to the initial control signal, the charging pile can promptly determine that its target access state is the three-phase charging state, thereby entering the corresponding charging process.

[0042] Step S1014: If the duty cycle of the initial control signal is adjusted to 53.3% and the voltage amplitude is adjusted to 6V, it is determined that the target access state of the electric vehicle is the single-phase charging state.

[0043] In this step, the initial control signal's duty cycle is adjusted to 53.3% and its voltage amplitude is adjusted to 6V. This is the characteristic signal that the EV is sending back to the charging station, indicating that single-phase charging is required. The charging station detects this change and determines the EV's target connection state. For example, for some electric vehicles with smaller battery capacities or relatively low charging requirements, single-phase charging is usually sufficient. When these electric vehicles are connected to a charging station, their internal control circuit adjusts the duty cycle of the initial control signal to 53.3% and the voltage amplitude to 6V, and feeds this back to the charging station. After the signal detection circuit of the charging station detects this signal change, it transmits the information to the controller. The controller determines that the target connection state of the electric vehicle is a single-phase charging state based on preset rules, and then controls the relevant relay switch unit to close, outputting a single-phase power signal.

[0044] In steps S1011 through S1014, the charging pile is designed with predefined signal characteristics corresponding to different target access states. The electric vehicle adjusts the initial control signal based on these characteristics to ensure accurate identification by the charging pile. By clearly identifying the signal changes corresponding to different target access states, the charging pile can quickly and accurately determine the electric vehicle's charging needs, thereby providing appropriate power output and achieving efficient interaction and accurate control between the charging pile and the electric vehicle.

[0045] In step S102, if the target access state is the charge-discharge coordinated state, the relay switch units corresponding to the live wire set and the relay switch units corresponding to the neutral wire set of the charging pile are controlled to be all closed to output the first three-phase power signal; the first phase power in the first three-phase power signal is greater than the second phase power and the first phase power is greater than the third phase power.

[0046] The relay switch units corresponding to the live and neutral wires are electronic switching devices used to control the power transmission lines between the charging station and the electric vehicle. When these relay switch units are closed, the corresponding lines are conductive, allowing for smooth power transmission. The first three-phase power signal is a three-phase alternating current signal with a specific power distribution, where the first phase power is greater than the second phase power and greater than the third phase power.

[0047] For example, the relay switch unit can be an electromagnetic relay, which realizes the closing and opening of the switch through the action of electromagnetic force. For example, when the controller of the charging pile sends a control signal, the coil of the electromagnetic relay is energized, generating electromagnetic force to attract the armature, closing the switch contacts, and thus conducting the corresponding circuit. In the embodiment of the present application, when the target access state is the charge-discharge coordinated state, the controller of the charging pile will send a signal to the relay switch unit corresponding to the live wire set (such as Figure 2Including the relay switch units corresponding to the first live wire L1a, the second live wire L1b, the second phase live wire L2, and the third phase live wire L3) and the relay switch units corresponding to the neutral wire set (such as Figure 2 Including the relay switch units corresponding to the first sub-zero line Na and the second sub-zero line Nb) send a closing signal to close all the relay switch units, thereby outputting the first three-phase power signal.

[0048] The power distribution of the first three-phase electric energy signal is achieved by setting the parameters of the internal circuit of the charging pile. For example, by adjusting the wire specifications, impedance and other parameters of the live wire set and the neutral wire set, the first phase live wire set (including the first sub-live wire and the second sub-live wire) can carry a larger current, thereby achieving the first phase power greater than the second phase power and the first phase power greater than the third phase power. For example, the first phase live wire set (such as Figure 2 As shown, it includes the first live wire L1a and the second live wire L1b) and the neutral wire set (such as Figure 2 As shown, the high-voltage circuit including the first sub-neutral line Na and the second sub-neutral line Nb is designed and selected according to the rated current carrying capacity of 32A, and the high-voltage circuit of the second phase live line L2 and the third phase live line L3 is designed and selected according to the rated current carrying capacity of 16A. In this way, when the first three-phase electric energy signal is output, the requirements that the first phase power is greater than the second phase power and the first phase power is greater than the third phase power can be met.

[0049] Furthermore, when it is determined that the target access state of the electric vehicle is the charge-discharge coordinated state, the charging pile controls the relay switch unit to close in the above manner, outputs the first three-phase power signal, and provides power for the charge-discharge coordinated work of the electric vehicle.

[0050] In step S103, under the condition that the charging pile outputs the first three-phase power signal, the first switch module corresponding to the discharge module of the electric vehicle and the second switch module corresponding to the charging module are controlled to be all closed, so that the electric vehicle discharges to the external device during charging using the charging pile. The first switch module corresponding to the electric vehicle's discharge module and the second switch module corresponding to the charging module are switch devices used to control the flow of electrical energy within the electric vehicle. When these switch modules are closed, the corresponding circuits are connected, enabling the transmission and distribution of electrical energy. The discharge module is used to convert the electrical energy in the electric vehicle's battery into electrical energy suitable for use by external devices and output it. The charging module is used to convert the electrical energy input from the charging station into electrical energy suitable for charging the electric vehicle's rechargeable battery and charge the rechargeable battery. The charging module of an electric vehicle typically includes components such as an on-board charger, which is responsible for converting the AC power input from the charging station into DC power suitable for battery charging.

[0051] In an optional embodiment, the first switch module and the second switch module can be a contactor switch unit. For example, the contactor switch unit uses electromagnetic principles to close or open contacts under the action of a control signal, thereby controlling the on / off of the circuit. In the embodiment of the present application, when the charging pile outputs the first three-phase power signal, the controller of the electric vehicle will send a signal to the first switch module (such as Figure 2 The 220V discharge port 203 in the charging pile 10 is connected to the first contactor switch unit K21 and the second contactor switch unit K22) and the second switch module corresponding to the charging module (such as Figure 2 The third contactor switch unit K23 and the fourth contactor switch unit K24 connected to the on-board charger 205 and the rechargeable battery 204 send a closing signal to close all these switch modules.

[0052] Specifically, the discharge module and the charging module can contain a variety of electronic components and circuits for realizing the conversion and control of electrical energy. For example, the inverter in the discharge module can convert the direct current of the battery into alternating current suitable for use by external devices, and the on-board charger in the charging module can convert the alternating current input by the charging pile into direct current suitable for charging the battery. Furthermore, when the first switch module and the second switch module are closed, when the electric vehicle is charging using the charging pile, the discharge module can discharge part of the electrical energy to the external device through the 220V discharge port, realizing the coordinated work of charging and discharging, and meeting the user's power needs in different scenarios.

[0053] Furthermore, the interactive control method provided in the embodiment of the present application also includes: after the first switch module corresponding to the discharge module of the electric vehicle and the second switch module corresponding to the charging module are all closed, controlling the electric vehicle to enter the charging and discharging mode; wherein the charging and discharging mode refers to a working mode in which the charging pile is used to charge with a charging power of 11kW and discharge to an external device with a discharge power of 3.5kW.

[0054] Among them, the charge and discharge mode enables the electric vehicle to discharge to external devices while charging.

[0055] For example, when a charging station is charging an electric vehicle at 11kW, the first contactor switch unit connects the first phase live wire of the charging station to the 220V discharge port, the second contactor switch unit connects the neutral wire of the charging station to the 220V discharge port, and the third and fourth contactor switch units ensure a proper connection between the onboard charger and the rechargeable battery. While the electric vehicle is charging, the discharge module converts some of the electrical energy into AC power suitable for external devices, discharging it at a discharge power of 3.5kW to external devices (such as an onboard refrigerator or outdoor lighting).

[0056] Alternatively, multiple conditions must be met for an electric vehicle to enter charge and discharge mode, such as stable power output from the charging station and an acceptable battery temperature. The controller monitors these conditions in real time. Only when all conditions are met will it control the relevant contactor switch units to close, entering charge and discharge mode, ensuring safe and efficient charging and discharging.

[0057] Furthermore, the relevant contactor switch units are controlled to close in the above manner, so that the electric vehicle enters the charging and discharging mode, realizing the functions of charging with 11kW charging power and discharging with 3.5kW discharging power, meeting the user's electricity needs in different scenarios.

[0058] For example, when an electric vehicle needs to charge, the charging station's charging plug is plugged into the vehicle's charging port. The charging station's PWM generator first outputs an initial control signal (voltage amplitude of 9V, duty cycle of 96%) to the electric vehicle. If the electric vehicle supports the coordinated charge and discharge function, it processes the initial control signal and adjusts the voltage amplitude to 6V, while maintaining the same duty cycle. After detecting this signal change, the charging station determines that the electric vehicle's target connection state is the coordinated charge and discharge state. At this point, the charging station's controller controls the relay switch units corresponding to the live wire set (i.e., the relay switch units corresponding to the first live sub-wire, the second live sub-wire, the second phase live wire, and the third phase live wire) and the relay switch units corresponding to the neutral wire set (i.e., the relay switch units corresponding to the first neutral sub-wire and the second neutral sub-wire) to close, outputting the first three-phase power signal. Because the high-voltage circuits of the first live wire set (including the first and second live sub-wires L1a and L1b) and the neutral wire set (including the first and second neutral sub-wires Na and Nb) are designed and selected for a rated current carrying capacity of 32A, and the high-voltage circuits of the second-phase live wire L2 and the third-phase live wire L3 are designed and selected for a rated current carrying capacity of 16A, the first-phase power in the outputted first three-phase power signal is greater than both the second-phase power and the third-phase power. Subsequently, upon detecting the first three-phase power signal outputted by the charging pile, the electric vehicle's controller controls the first switch modules corresponding to the discharge module (e.g., the first and second contactor switch units connecting the 220V discharge port to the charging pile) and the second switch modules corresponding to the charging module (e.g., the third and fourth contactor switch units connecting the onboard charger to the rechargeable battery) to all close. In this way, while new energy vehicles are being charged at a charging power of 11kW using a charging pile, they can also discharge to external devices at a discharge power of 3.5kW through a 220V discharge port, such as powering car refrigerators, outdoor lighting equipment, etc., achieving efficient charging and discharging coordination.

[0059] Optionally, the interactive control method provided in the embodiment of the present application further includes: Step 201: If the target access state is a three-phase charging state, the relay switch units corresponding to one of the live wires in the first-phase live wire set, the second-phase live wire, the third-phase live wire, and one of the neutral wires in the neutral wire set of the charging pile are all controlled to be closed to output a second three-phase power signal; the first-phase power, the second-phase power, and the third-phase power in the second three-phase power signal are the same.

[0060] The three-phase charging state refers to the state in which an electric vehicle, after being connected to a charging station and having confirmed the need for three-phase charging, requires charging. The relay switch units corresponding to one of the live wires in the first-phase live wire set, the second-phase live wire, the third-phase live wire, and one of the neutral wires in the neutral wire set are key components for controlling the on / off of the three-phase charging circuit between the charging station and the electric vehicle. Whether this relay is closed or not directly determines whether electrical energy can be transmitted. The second-phase power signal is a three-phase AC signal with three-phase power balance. For example, if the high-voltage circuits for the second-phase live and third-phase live wires are designed and selected for a rated current carrying capacity of 16A, and if the electric vehicle's target connection state is detected as three-phase charging, the charging pile controller will send a close command to the relay switch units controlling one of the live wires in the first-phase live wire set (such as the first sub-live wire or the second sub-live wire), the second-phase live wire, the third-phase live wire, and one of the neutral wires in the neutral wire set (such as the first sub-neutral wire or the second sub-neutral wire). For example, if the relay switch units corresponding to the first sub-live wire, the second-phase live wire, the third-phase live wire, and the first sub-neutral wire are closed, due to the appropriate configuration of the circuit parameters, the three-phase power in the output second three-phase power signal will be the same. At this time, power will be output according to the maximum allowable capacity of 11kW (three-phase / 220V / 16A), meeting the electric vehicle's three-phase charging requirements. Specifically, taking the relay switch unit as an electromagnetic relay as an example, when the controller of the charging pile detects the signal that the electric vehicle is in a three-phase charging state, it sends a power-on signal to the four electromagnetic relays corresponding to one of the live wires in the first phase live wire concentration, the second phase live wire, the third phase live wire, and one of the neutral wires in the neutral wire concentration, so that the relevant circuits of the electromagnetic relays are turned on and a stable second three-phase power signal is output.

[0061] In actual applications, after the charging pile outputs the initial control signal (such as a PWM signal with a duty cycle of 96%), if the electric vehicle cannot correctly identify it, the duty cycle of the PWM signal is adjusted to 26.7%. When the electric vehicle can correctly identify and enter the charging process, and detects that all three phases are outputting current, the charging pile will close the corresponding relay switch units in the above manner, output the second three-phase power signal, and enter the three-phase charging mode.

[0062] Step 202: Under the condition that the charging pile outputs a second three-phase power signal, control the second switch module corresponding to the charging module of the electric vehicle to be closed, so that the electric vehicle uses the charging pile for three-phase charging.

[0063] Here, when the charging pile outputs the second three-phase power signal, the electric vehicle's controller receives the signal and sends a closing instruction to the second switch module, such as the third and fourth contactor switch units. For example, the input end of the on-board charger is connected to the first-phase live wire set, the second-phase live wire set, the third-phase live wire set, and the neutral wire set of the charging pile, and the output end is connected to the rechargeable battery through the third and fourth contactor switch units. When the third and fourth contactor switch units are closed, the on-board charger converts the three-phase AC power input from the charging pile into DC power to charge the rechargeable battery, completing the three-phase charging process of the electric vehicle.

[0064] Specifically, when the controller detects that the second three-phase power signal output by the charging station meets charging requirements, it controls the second switch module to close according to a preset program. For example, in some smart electric vehicles, the controller has a complex charging management system built into it. This system monitors the power signal parameters input by the charging station in real time, such as voltage, current, and frequency. Only when these parameters meet the three-phase charging standards will the controller control the second switch module to close, ensuring a safe and efficient charging process.

[0065] Furthermore, after the charging pile outputs the second three-phase power signal, the electric vehicle controls the second switch module corresponding to the charging module to close in the above manner, thereby successfully using the charging pile for three-phase charging to meet the charging needs of the electric vehicle battery.

[0066] The embodiment of the present application can integrate the charge and discharge coordination function and the three-phase charging function on a charging pile to adapt to electric vehicles with different needs, so that only one type of charging pile is needed to meet the charging needs of electric vehicles with various power in the market, solving the problem of the various types of charging piles and improving the versatility and adaptability of the charging piles.

[0067] Optionally, the interactive control method provided in the embodiment of the present application further includes: Step 301: If the target access state is a single-phase charging state, control the relay switch units corresponding to the first-phase live wire set and the relay units corresponding to the neutral wire set of the charging pile to be all closed to output a single-phase power signal.

[0068] In this step, the single-phase charging state refers to the working state in which the electric vehicle is connected to the charging pile and interactively confirmed to be charging in the form of single-phase electricity. The single-phase power signal is a single-phase AC power signal used to provide single-phase charging power to the electric vehicle.

[0069] In an optional embodiment, when the charging pile detects that the electric vehicle's target connection state is single-phase charging, the controller sends a close command to all relays controlling the relay switch units of the first-phase live wire set (i.e., the first and second live sub-wires) and the relay switch units of the neutral wire set (i.e., the first and second neutral sub-wires). For example, when the relay switch units corresponding to the first and second live sub-wires, as well as the relay switch units corresponding to the first and second neutral sub-wires, are all closed, the charging pile outputs a single-phase power signal at its maximum allowable capacity of 7 kW (single-phase / 220V / 32A), enabling single-phase charging of the electric vehicle.

[0070] For example, taking the relay switch unit as an electromagnetic relay, in some small electric vehicle charging scenarios, after receiving the single-phase charging request signal of the electric vehicle, the controller of the charging pile controls the electromagnetic relays corresponding to the first-phase live wire set and the neutral wire set to close, establish a single-phase charging circuit, and output a stable single-phase power signal.

[0071] Specifically, after the charging pile outputs the initial control signal, if it detects that only a single phase has current, it adjusts the duty cycle of the PMW signal to 53.3%. At this time, the charging pile closes all the relay switch units corresponding to the first phase live wire set (i.e. Figure 2 The relay switch units corresponding to the first live sub-line L1a and the second live sub-line L1b in the neutral line set), all relay switch units corresponding to the neutral line set (ie Figure 2 The relay switch unit corresponding to the first sub-zero line Na and the second sub-zero line Nb in the embodiment of the present invention outputs a single-phase power signal in the above manner and enters the single-phase charging process.

[0072] Step 302: Under the condition that the charging pile outputs a single-phase power signal, control the second switch module corresponding to the charging module of the electric vehicle to be closed, so that the electric vehicle uses the charging pile for single-phase charging.

[0073] The function and structure of the second switch module here are the same as those of the second switch module in step 103 and step 202, and are not described again here.

[0074] Specifically, when the charging pile outputs a single-phase power signal, the controller of the electric vehicle detects the signal and sends a signal to the second switch module (such as Figure 2 The third contactor switch unit K23 and the fourth contactor switch unit K24 in the circuit send a closing instruction. Figure 2In the example, the input end of the onboard charger 205 is connected to the first-phase live and neutral wires of the charging pile 10, and the output end is connected to the rechargeable battery 204 through the third contactor switch unit K23 and the fourth contactor switch unit K24. When the third contactor switch unit K23 and the fourth contactor switch unit K24 are closed, the onboard charger 205 converts the input single-phase AC power into DC power to charge the rechargeable battery 204, completing the single-phase charging process of the electric vehicle 20.

[0075] Furthermore, after the charging pile outputs a single-phase power signal, the electric vehicle controls the second switch module corresponding to the charging module to close in the above manner, and can use the charging pile to complete single-phase charging, meeting the charging needs of the vehicle in this scenario.

[0076] The embodiment of the present application can integrate the charge-discharge coordination function, the three-phase charging function and the single-phase charging function on a charging pile to adapt to electric vehicles with different needs. In this way, before the charging pile starts charging, the controller circuit will first detect and judge the charging needs of the electric vehicle, and then control the corresponding relay switch unit to operate according to the judgment result, thereby realizing charging output of different powers, so that only one type of charging pile is needed to meet the charging needs of electric vehicles of various powers in the market, solving the problem of the various types of charging piles and improving the versatility and adaptability of the charging piles.

[0077] In a second aspect, the embodiment of the present application further provides an interactive control system between a charging pile and an electric vehicle, which performs the following operations: Figure 1 The interactive control method, such as Figure 2 As shown, the interactive control system includes a charging pile 10 and an electric vehicle 20 , and the charging pile 10 is connected to the electric vehicle 20 via a charging gun 104 .

[0078] Through reasonable circuit connection and module setting, the embodiment of the present application only requires one type of charging pile to meet the market charging needs of 7kw, 11kw, and 14kw (11kw charging + 3.5kw in-vehicle discharge) new energy vehicles, solving the problems of poor adaptability between charging piles and electric vehicles and a single charging mode, improving the user's interactive experience during the charging process, and also optimizing the coordinated operation of the charging and discharging functions of electric vehicles.

[0079] The charging pile 10 includes a charging circuit 101, a controller circuit 102, and a switch circuit 103. The charging circuit 101 is connected to the electric vehicle 20 via the switch circuit 103, and the controller circuit 102 is connected to the switch circuit 103. The charging circuit 101 includes a first-phase live wire set (specifically, a first live sub-wire L1a and a second live sub-wire L1b), a second-phase live wire L2, a third-phase live wire L3, a neutral wire set (specifically, a first neutral sub-wire Na and a second neutral sub-wire Nb), a ground wire PE, and four output lines. The first-phase live wire set, the second-phase live wire L2, the third-phase live wire L3, and the neutral wire set are each connected to an output line. The output line is used to connect to the electric vehicle 20, and the ground wire is grounded to ensure electrical safety.

[0080] Here, the charging circuit 101 is the core part of the entire charging pile to achieve power transmission. Its main function is to process and transmit the electric energy in the power grid to adapt to the charging needs of electric vehicles. It contains lines such as the live wire and the neutral wire. Through reasonable circuit layout and design, it ensures that the electric energy can be transmitted stably and safely. The switching circuit 103 is a key component that controls the connection and disconnection between the charging circuit 101 and the electric vehicle. It connects and disconnects the circuit by opening and closing the relay switch unit. The controller circuit 102 is responsible for comprehensive control and management of the operation of the charging pile, including control of the switching circuit 103, monitoring and regulation of the charging process, etc. It monitors the charging status in real time by receiving signals fed back by various sensors, and controls the operation of the switching circuit 103 according to preset programs and rules.

[0081] Among them, when designing the charging circuit, the current carrying capacity, insulation performance, etc. of the line will be specifically designed according to different charging standards and power requirements. For example, when meeting high-power charging needs, a wire with a stronger current carrying capacity will be selected as the line of the charging circuit to ensure that there will be no safety problems such as line overheating when large currents are transmitted. For example, when selecting the relay switch unit of the switching circuit, the rated current and voltage of its contacts will be considered to ensure that the on and off of the charging circuit can be reliably controlled. For example, when the charging pile needs to output a large current, a relay switch unit with a larger rated current will be selected to ensure that the contacts will not be burned during frequent opening and closing.

[0082] For example, the controller circuit can use a microprocessor as the core control unit and implement intelligent control of the charging pile by writing a corresponding control program. For example, when an abnormal situation such as overcurrent or overvoltage is detected during the charging process, the controller circuit can quickly control the switch circuit to disconnect to ensure the safety of the charging process. In the actual charging scenario, the controller circuit will first communicate with the electric vehicle to obtain the charging requirements and battery status information of the electric vehicle. Then, based on this information, the relay switch unit of the control circuit is opened and closed in the appropriate order and time to achieve an efficient and safe charging process.

[0083] Here, the first-phase live wire set, the second-phase live wire set, the third-phase live wire set, and the neutral wire set form the main circuit for power transmission between the charging station and the electric vehicle. The first-phase live wire set includes the first and second sub-live wires, and the neutral wire set includes the first and second sub-neutral wires. These circuits are designed to determine their current carrying capacity and specifications based on different charging modes and power requirements. The output line bridges the gap between the charging station's internal circuitry and the electric vehicle's charging port, ensuring stable transmission of power from the charging circuit to the electric vehicle. Grounding ensures electrical safety during charging. If an abnormality such as leakage occurs in the circuit, the ground wire can direct the current to the ground, preventing electric shock accidents.

[0084] Optionally, for the first-phase live wire set, its current carrying capacity in different charging modes will be considered during design. For example, in the case of privately defined three-phase charging, the first-phase live wire set needs to carry a larger current, so wires with stronger current carrying capacity and related electrical components will be selected. For example, in actual applications, the first-phase live wire set may use multi-strand copper core wires to improve its current carrying capacity and flexibility. For the output line, a wire with a suitable cross-sectional area will be selected based on the distance between the charging pile and the electric vehicle and the charging power requirement. For example, when the distance between the charging pile and the electric vehicle is far, in order to reduce line loss, a wire with a larger cross-sectional area will be selected as the output line.

[0085] The switching circuit 103 includes six relay switch units, specifically connected as follows: the first live sub-line L1a in the first-phase live line set is connected to the first output line via the first relay switch unit K11; the second live sub-line L1b is connected to the first output line via the second relay switch unit K12; the second-phase live line L2 is connected to the second output line via the third relay switch unit K13; the third-phase live line L3 is connected to the third output line via the fourth relay switch unit K14; the first sub-neutral line Na in the neutral line set is connected to the fourth output line via the fifth relay switch unit K15; and the second sub-neutral line Nb is connected to the fourth output line via the sixth relay switch unit K16. This connection method enables the charging pile to flexibly control the on / off of each line according to different charging needs, achieving different charging modes.

[0086] The first and second relay switch units are used to control the connection between the first and second live sub-wires and the first output line. Similarly, the third through sixth relay switch units control the connection between the second phase live wire, the third phase live wire, the first sub-neutral wire, and the second sub-neutral wire, respectively, and their corresponding output lines. These relay switch units enable the charging pile to flexibly control circuit connections based on different charging modes and requirements.

[0087] In an optional embodiment, when the relay switch unit is working, it will open and close according to the control signal sent by the controller circuit. For example, when the charging pile performs privately defined three-phase charging, the controller circuit will control the first to sixth relay switch units to be all closed, so that the first phase live wire set, the second phase live wire, the third phase live wire and the neutral wire set are all connected to the circuit to achieve the maximum allowable output capacity of 14kw. For another example, when it is detected that only a single phase has current, the controller circuit will control the closing of the first and second relay switch units corresponding to the first sub-live wire and the second sub-live wire, as well as the fifth and sixth relay switch units corresponding to the first sub-neutral wire and the second sub-neutral wire, to output according to the maximum allowable capacity of 7kw. In actual scenarios, before the charging pile starts charging, the controller circuit will first detect and judge the charging needs of the electric vehicle, and then control the corresponding relay switch units to act according to the judgment result, thereby achieving charging outputs of different powers.

[0088] Taking the three-phase charging mode as an example, when the charging pile 10 detects that the target access state of the electric vehicle 20 is the three-phase charging state, the controller circuit 102 sends a closing signal to the first relay switch unit K11 (or the second relay switch unit K12), the third relay switch unit K13, the fourth relay switch unit K14, and the fifth relay switch unit K15 (or the sixth relay switch unit K16), so that the lines corresponding to the first sub-live line L1a (or the second sub-live line L1b), the second phase live line L2, the third phase live line L3, and the first sub-neutral line Na (or the second sub-neutral line Nb) are turned on, and the second three-phase power signal is transmitted to the electric vehicle 20 through the output line to achieve three-phase charging.

[0089] Furthermore, the rated current carrying capacity of the first phase live wire set is greater than the rated current carrying capacity of the second phase live wire, and the rated current carrying capacity of the first phase live wire set is greater than the rated current carrying capacity of the third phase live wire, and the rated current carrying capacity of the second phase live wire is the same as the rated current carrying capacity of the third phase live wire.

[0090] To meet the power requirements of electric vehicles in different connection modes, the current carrying capacity of each phase live wire is designed differently. In privately defined three-phase charging, the first phase live wire set needs to provide power for both charging the electric vehicle and discharging external devices, so it requires a large current carrying capacity. In contrast, in conventional three-phase charging mode, the second and third phase live wires carry relatively low currents, so their rated current carrying capacity is designed to be the same.

[0091] In this embodiment, the high-voltage circuits of the first-phase live wire set (including the first and second live sub-wires L1a and L1b) and the neutral wire set (including the first and second neutral sub-wires Na and Nb) are designed and selected for a rated current carrying capacity of 32A. The high-voltage circuits of the second-phase live wire L2 and the third-phase live wire L3 are designed and selected for a rated current carrying capacity of 16A. Furthermore, in actual hardware selection, the conductors of the first-phase live wire set will be made of a material with a larger cross-sectional area and better conductivity to ensure they can carry the rated current of 32A. The conductors of the second-phase live wire and the third-phase live wire can be made of a material with a relatively smaller cross-sectional area to meet the rated current carrying capacity requirement of 16A.

[0092] Optionally, the cross-sectional area of ​​the first output line is greater than that of the second output line, and the cross-sectional area of ​​the first output line is greater than that of the third output line, and the cross-sectional area of ​​the first output line is the same as that of the fourth output line.

[0093] Here, since the rated current carrying capacity of the first-phase live wire set is greater than that of the second-phase live wire and the third-phase live wire, in order to ensure that the electric energy can be transmitted safely and stably, the first output line needs to have a larger cross-sectional area to reduce line resistance and loss. The current carried by the second and third output lines is relatively small, so their cross-sectional areas can be reduced accordingly. At the same time, the first output line and the fourth output line are connected to the first-phase live wire set and the neutral wire set respectively. In some charging modes, they need to carry a large current together, so their cross-sectional areas are designed to be the same. For example, in the actual manufacturing process of the charging pile, the first and fourth output lines may use wires with a cross-sectional area of ​​4mm², while the second and third output lines use wires with a cross-sectional area of ​​2.5mm².

[0094] For example, when a user uses the charging station to charge an electric vehicle, the charging station first outputs a PWM signal with a privately defined duty cycle (e.g., 96%). If the new energy vehicle is correctly identified, the controller circuit controls the closure of all relays corresponding to the first live wire, second live wire, second-phase live wire, third-phase live wire, first neutral wire, and second neutral wire. At this point, the charging circuit outputs at the maximum permitted capacity of 14 kW, achieving efficient charging. If the new energy vehicle is not correctly identified, the controller circuit adjusts the PWM signal's duty cycle to 26.7%. Once the new energy vehicle is correctly identified and enters the charging process, if current is detected on all three phases, the controller circuit controls the closure of the relays corresponding to one live wire in the first live wire cluster (either the first live wire or the second live wire), the second-phase live wire, the third-phase live wire, and one neutral wire in the neutral cluster (either the first neutral wire or the second neutral wire). The charging circuit then outputs at the maximum permitted capacity of 11 kW. If current is detected in only a single phase, the controller circuit adjusts the duty cycle of the PMW signal to 53.3%, closes all relays corresponding to the first live wire set, and closes all relays corresponding to the neutral wire set, and the charging circuit outputs at the maximum allowable capacity of 7 kW. This operating mode allows the charging pile to flexibly adjust the charging mode and power output according to the charging needs of different electric vehicles, achieving the goal of only requiring a single charging pile model to meet the market charging needs of new energy vehicles with 7 kW, 11 kW, and 14 kW (11 kW charging + 3.5 kW in-vehicle discharge).

[0095] In an optional embodiment, the electric vehicle includes a charging module and a discharging module. The discharging module is connected to the first phase live wire set and the neutral wire set of the charging pile via a first switch module, and the charging module is connected to the first phase live wire set, the second phase live wire set, the third phase live wire set, and the neutral wire set of the charging pile via a second switch module. The discharging module includes a 220V discharge port 203, and the first switch module 201 includes a first contactor switch unit K21 and a second contactor switch unit K22. The first phase live wire set of the charging pile 10 is connected to the 220V discharge port 203 via the first contactor switch unit K21, and the neutral wire set of the charging pile 10 is connected to the 220V discharge port 203 via the second contactor switch unit K22.

[0096] The 220V discharge port is the outlet for the electric vehicle to discharge power. Its design conforms to the universal 220V AC interface standard and is compatible with most common electrical devices. The first and second contactor relay switch units are responsible for controlling the connection between the 220V discharge port and the charging station circuit. For example, to charge a laptop computer using an electric vehicle, a user plugs the laptop's power adapter into the electric vehicle's 220V discharge port and sends a discharge command through the electric vehicle's control interface. The electric vehicle's controller then controls the first and second contactor relay switch units to close, connecting the first phase live and neutral wires of the charging station to the 220V discharge port. This transfers power to the laptop's power adapter, effectively charging the laptop. For another example, in a camping scenario, users can use the 220V discharge port to power small refrigerators, lights, and other appliances, providing convenience for camping, further expanding the use cases of electric vehicles, and enhancing the user experience.

[0097] The charging module includes an on-board charger 205 and a rechargeable battery 204, the second switch module includes a third contactor switch unit K23 and a fourth contactor switch unit K24, the first phase live wire set, the second phase live wire, the third phase live wire and the neutral wire set of the charging pile 10 are all connected to the on-board charger 205, and the on-board charger 205 is connected to the rechargeable battery 204 through the third contactor switch unit K23 and the fourth contactor switch unit K24.

[0098] The onboard charger is a key device that converts the electrical energy transmitted by the charging pile into a form suitable for storage in the rechargeable battery. It performs rectification, filtering, and voltage regulation on the input electrical energy. The rechargeable battery is the component used to store the electrical energy. The third and fourth contactor relay switch units control the on-board charger and rechargeable battery circuits. For example, during national standard single-phase charging, the charging pile outputs power through the first live and neutral wires, delivering the maximum allowable capacity of 7 kW (single-phase / 220V / 32A). At this time, the controller controls the third and fourth contactor relay switch units in the second switch module to close, allowing the onboard charger to process the electrical energy drawn from the charging pile and transfer it to the rechargeable battery.

[0099] For example, when an electric vehicle enters charge / discharge mode, the charging pile charges the electric vehicle at 11kW. Simultaneously, under the control of the controller, the electric vehicle's discharge module, via the first and second contactor switch units, outputs a portion of the power input from the charging pile through the 220V discharge port, discharging it to external devices at a discharge power of 3.5kW. The onboard charger, via the third and fourth contactor switch units, converts the remaining power into direct current (DC) to charge the rechargeable battery, achieving coordinated charging and discharging.

[0100] The embodiment of the present application provides an interactive control system between a charging pile and an electric vehicle. Before the charging pile starts charging, the controller circuit will first detect and judge the charging demand of the electric vehicle, and then control the corresponding relay switch unit to operate according to the judgment result, thereby realizing charging output of different powers. Furthermore, through the unique circuit design and switch connection method, only one type of charging pile is needed to meet the charging needs of electric vehicles of various powers in the market, solving the problem of a wide variety of charging pile models and improving the versatility and adaptability of the charging pile. Specifically, the charging pile can flexibly adjust the charging mode and power output according to the charging needs of different electric vehicles, realizing that only one type of charging pile is needed to meet the charging needs of 7kw, 11kw, and 14kw (11kw charging + 3.5kw in-vehicle discharge) electric vehicles in the market.

[0101] See also Figure 3 , Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 3 As shown in FIG, the electronic device 300 includes a processor 310 , a memory 320 and a bus 330 .

[0102] The memory 320 stores machine-readable instructions executable by the processor 310. When the electronic device 300 is running, the processor 310 communicates with the memory 320 via the bus 330. When the machine-readable instructions are executed by the processor 310, the above-mentioned Figure 1 The specific implementation of the steps of the interactive control method in the method embodiment shown can be found in the method embodiment and will not be repeated here.

[0103] The embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program can execute the above-mentioned Figure 1 The specific implementation of the steps of the interactive control method in the method embodiment shown can be found in the method embodiment and will not be repeated here.

[0104] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0105] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0106] The units described as separate components may or may not be physically separate, and 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 these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0107] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0108] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0109] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-mentioned embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for interactive control of a charging pile and an electric vehicle, characterized in that: The charging pile includes a live wire set and a neutral wire set, the live wire set includes a first-phase live wire set, a second-phase live wire, and a third-phase live wire, the neutral wire set includes a first sub-neutral wire and a second sub-neutral wire, the first-phase live wire set includes a first sub-live wire and a second sub-live wire, the first sub-live wire, the second sub-live wire, the second-phase live wire, the third-phase live wire, the first sub-neutral wire, and the second sub-neutral wire are respectively connected to a relay switch unit, and the interactive control method includes: Determining a target access state of the electric vehicle based on a signal change of an initial control signal output by the charging pile; the target access state is one of the following access states: a charge-discharge coordinated state, a three-phase charging state, and a single-phase charging state; If the target access state is the charge-discharge coordinated state, the relay switch units corresponding to the live wire set and the relay switch units corresponding to the neutral wire set of the charging pile are controlled to be all closed to output a first three-phase power signal; the first phase power in the first three-phase power signal is greater than the second phase power and the first phase power is greater than the third phase power; Under the condition that the charging pile outputs the first three-phase power signal, the first switch module corresponding to the discharge module of the electric vehicle and the second switch module corresponding to the charging module are controlled to be all closed, so that the electric vehicle discharges to the external device during the charging process using the charging pile.

2. The interactive control method according to claim 1, characterized in that: The interactive control method further includes: If the target access state is a three-phase charging state, the relay switch units corresponding to one of the live wires in the first-phase live wire set, the second-phase live wire, the third-phase live wire, and one of the neutral wires in the neutral wire set of the charging pile are all controlled to be closed to output a second three-phase power signal; the first-phase power, the second-phase power, and the third-phase power in the second three-phase power signal are the same; Under the condition that the charging pile outputs the second three-phase power signal, the second switch module corresponding to the charging module of the electric vehicle is controlled to be closed, so that the electric vehicle uses the charging pile for three-phase charging.

3. The interactive control method according to claim 1 or 2, characterized in that: The interactive control method further includes: If the target access state is a single-phase charging state, controlling the relay switch units corresponding to the first-phase live wire set and the relay units corresponding to the neutral wire set of the charging pile to be all closed to output a single-phase power signal; Under the condition that the charging pile outputs the single-phase power signal, the second switch module corresponding to the charging module of the electric vehicle is controlled to be closed, so that the electric vehicle is charged in single phase using the charging pile.

4. The interactive control method according to claim 1, characterized in that: The step of determining the target access state of the electric vehicle according to a signal change of the initial control signal output by the charging pile includes: Control the PWM generator of the charging pile to output an initial control signal, which is a reference signal with a voltage amplitude of 9V and a duty cycle of 96%; If the voltage amplitude of the initial control signal is adjusted to 6V and the duty cycle remains unchanged, it is determined that the target access state of the electric vehicle is the charge-discharge coordinated state; If the duty cycle of the initial control signal is adjusted to 26.7% and the voltage amplitude is adjusted to 6V, it is determined that the target access state of the electric vehicle is a three-phase charging state; If the duty cycle of the initial control signal is adjusted to 53.3% and the voltage amplitude is adjusted to 6V, it is determined that the target connection state of the electric vehicle is a single-phase charging state.

5. The interactive control method according to claim 4, characterized in that: The method further comprises: After the first switch module corresponding to the discharge module of the electric vehicle and the second switch module corresponding to the charging module are all closed, the electric vehicle is controlled to enter the charging and discharging mode; wherein, the charging and discharging mode refers to a working mode in which a charging pile is used to charge at a charging power of 11kW and discharge to an external device at a discharge power of 3.5kW.

6. An interactive control system for a charging pile and an electric vehicle, characterized in that: Executing the interactive control method according to any one of claims 1 to 5, comprising a charging pile and an electric vehicle, wherein the charging pile is connected to the electric vehicle via a charging gun, the charging pile comprises a charging circuit, a controller circuit, and a switch circuit, the charging circuit is connected to the electric vehicle via the switch circuit, and the controller circuit is connected to the switch circuit; The charging circuit includes a first-phase live wire set, a second-phase live wire, a third-phase live wire, a neutral wire set, a ground wire, and four output lines, wherein the first-phase live wire set, the second-phase live wire, the third-phase live wire, and the neutral wire set are respectively connected to one output line, the output line is used to be connected to the electric vehicle, and the ground wire is grounded; In which, the switching circuit includes six relay switching units; the first sub-live line in the first-phase live line set is connected to the first output line through the first relay switching unit, the second sub-live line in the first-phase live line set is connected to the first output line through the second relay switching unit, the second-phase live line is connected to the second output line through the third relay switching unit, the third-phase live line is connected to the third output line through the fourth relay switching unit, the first sub-neutral line in the neutral line set is connected to the fourth output line through the fifth relay switching unit, and the second sub-neutral line in the neutral line set is connected to the fourth output line through the sixth relay switching unit.

7. The interactive control system according to claim 6, characterized in that: The rated current carrying capacity of the first-phase live wire set is greater than the rated current carrying capacity of the second-phase live wire, and the rated current carrying capacity of the first-phase live wire set is greater than the rated current carrying capacity of the third-phase live wire, and the rated current carrying capacity of the second-phase live wire is the same as the rated current carrying capacity of the third-phase live wire.

8. The interactive control system according to claim 7, characterized in that: The cross-sectional area of ​​the first output line is greater than that of the second output line, and the cross-sectional area of ​​the first output line is greater than that of the third output line. The cross-sectional area of ​​the first output line is the same as that of the fourth output line.

9. The interactive control system according to claim 6, characterized in that: The electric vehicle includes a charging module and a discharging module. The discharging module is connected to the first phase live wire set and the neutral wire set of the charging pile through a first switch module. The charging module is connected to the first phase live wire set, the second phase live wire, the third phase live wire and the neutral wire set of the charging pile through a second switch module.

10. The charging control system according to claim 9, characterized in that: The discharge module includes a 220V discharge port, and the first switch module includes a first contactor switch unit and a second contactor switch unit. The first phase live wire set of the charging pile is connected to the 220V discharge port through the first contactor switch unit, and the neutral wire set of the charging pile is connected to the 220V discharge port through the second contactor switch unit. The charging module includes an on-board charger and a rechargeable battery, the second switch module includes a third contactor switch unit and a fourth contactor switch unit, the first phase live wire set, the second phase live wire, the third phase live wire and the neutral wire set of the charging pile are all connected to the on-board charger, and the on-board charger is connected to the rechargeable battery through the third contactor switch unit and the fourth contactor switch unit.

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