A charging pile alternating current double-gun charging control system and method

Abstract

The application discloses a charging pile AC double-gun charging control system and method, the system comprises a charging pile, a power supply control device and a charging gun; the CP is integrated in the charging gun, and the CP signal terminal is connected with the vehicle charging control system after the charging gun is inserted into the automobile charging port; the charging pile is connected to the vehicle with the charging pile to complete the charging; the charging gun is at least two, which is used for connecting to the charging port of the vehicle to be charged; the power supply control device is used for controlling the charging pile to charge the vehicle to be charged through each charging gun in turn. The application has the advantages that the charging pile is improved by the part of the circuit, the charging pile is compatible with two-way charging gun charging, the charging pile occupation problem is solved, and the switching control can be carried out to meet the charging demand of the user.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy electric vehicle charging control, in particular to a charging pile AC double-gun charging control system and method. BACKGROUND

[0002] Most of the working conditions of AC charging are to charge vehicles at night. Currently, the AC charging pile can only charge one vehicle, and if the vehicle owner does not use the vehicle in time after the battery is fully charged, the charging pile will be occupied. If another vehicle needs to be charged at this time, it can only wait until the current vehicle leaves before charging. This results in a large limitation in the selection of charging time. In addition, if there is a difference between peak and valley in city power consumption, if the first vehicle is charged and completed during the valley period, the user will not go down to unplug the gun to charge the second vehicle at the early morning time, and the second vehicle cannot enjoy the preferential whole car price brought by the valley power price during the day.

[0003] The charging of electric vehicles is generally carried out at night, which meets the requirement of using during the day and charging at night. Remote or on-site card swiping can be used for charging payment and starting charging. When the charging pile of the prior art charges the vehicle, it generally takes 4-8 hours to complete the charging. Even when the remaining battery of the vehicle is relatively large, the charging time can be further shortened. However, since the existing charging pile can only charge one vehicle, the use efficiency of the charging pile is affected, and it is impossible to use one charging pile to charge two vehicles. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art and provide a charging pile AC double-gun charging control system and method. By improving the charging gun circuit, one charging pile can be used to charge multiple vehicles, especially two vehicles.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a charging pile AC double-gun charging control system, comprising a charging pile, a power supply control device and a charging gun. The charging gun is integrated with a CP and a CP signal terminal. After the charging gun is inserted into the vehicle charging port, the CC and CP signal terminals are connected with the vehicle charging control system. The charging pile is connected to the vehicle to be charged through the charging gun to complete the charging. The charging gun is at least two, which is used to connect to the charging port of the vehicle to be charged respectively. The power supply control device is used to control the charging pile to charge the vehicle to be charged through each charging gun in turn.

[0006] In the three-phase power of the AC power output by the charging pile, a plurality of terminals are led out and connected to the charging terminals of each charging gun through a switch K. Each charging gun shares the N line and PE line in the three-phase power output by the charging pile.

[0007] The PE line output by the charging pile is connected to the CC terminal of the corresponding charging gun through a series switch S and a resistor RC.

[0008] The power supply control device has a 12V wake-up power supply and a PWM interaction signal terminal; the 12V wake-up power supply terminal and the PWM terminal are connected to one end of a multi-way switch S1, and the other end of the multi-way switch S1 is connected to the CP terminal of the corresponding charging gun through a resistor R1; the power supply control device controls the CP terminal of the charging gun to be connected to the 12V wake-up power supply terminal or the PWM terminal by driving the multi-way switch S1.

[0009] The charging gun is two, respectively charging gun 1 and charging gun 2, wherein the CP terminal of the charging gun 1 is connected to the multi-way switch S1 through the resistor R1; the CP terminal of the charging gun 2 is connected to the multi-way switch S1 through the resistor R1, and the other end of the multi-way switch S1 drives the multi-way switch S1 to select the CP terminal of the charging gun to be connected to the 12V wake-up power supply terminal or the PWM terminal according to the control signal of the power supply control device.

[0010] The 12V wake-up power supply terminal of the power supply control device has three terminals, respectively a, b, d; the multi-way switch S1 has two terminals, respectively connected to the CP terminals of the two charging guns through a resistor R1; the power supply control device drives the two terminals of the multi-way switch S1 to move and realizes that the terminals a, b, d or the PWM terminal are connected to the CP signal terminals of the two charging guns respectively or simultaneously according to the moving angle or distance.

[0011] The 12V wake-up power supply terminal has three terminals a, b, d and PWM terminal c, which are points on a circle, and when rotating clockwise or counterclockwise along the circumference, the sequence of the terminals is terminal a, terminal b, terminal c and terminal d in turn; the CP terminal of the charging pile 1 is connected to the terminal CP1 through a resistance, and the CP terminal of the charging pile 2 is connected to the terminal CP2 through a resistance; the terminals CP1 and CP2 are arranged on the driving mechanism, and the driving mechanism drives the terminals CP1 and CP2 to move along the circumference, and in the initial position, the CP1 terminal is in contact with the terminal 2 for conduction; the CP2 terminal is in contact with the terminal B for conduction; under the driving of the driving structure, the CP1 terminal is in contact with the terminals a, b and c in turn; under the driving of the driving structure, the CP2 terminal is in contact with the terminals b, c and d in turn.

[0012] The power supply control device collects the voltage at the CP terminal of the charging gun 1 and the voltage at the CP terminal of the charging gun 2 through the first voltage acquisition module and the second voltage acquisition module respectively; and monitors the charging state based on the voltage.

[0013] A control method of an AC double-gun charging control system of a charging pile, the method comprising: a power supply control device monitoring connection states of two charging guns in real time; when both charging guns are inserted, obtaining payment or charging orders of the two charging guns; after completing the payment or charging orders, starting charging of a vehicle by one of the charging guns after reaching a set start time; and switching the other charging gun to external charging after the vehicle charging is completed.

[0014] When charging switching is performed, the output of AC power of the charging gun is controlled by a switch K; whether the charging gun CC terminal is connected or not is controlled by controlling a switch S; and whether the charging gun CP terminal is connected or not is switched by a multi-way switch S1.

[0015] The application has the advantages that: by improving part of the circuit of the charging pile, one charging pile is compatible with two charging guns for charging, the problem of charging pile occupation is solved, switching control can be performed to meet the charging demand of users, automatic charging switching control in the charging valley stage can be realized, only one charging control device is needed, cost is saved, in the case of using only one power supply control device, the power in the charging process can be increased, the charging time of a single vehicle can be reduced by 50%, when the first vehicle is fully charged, the user does not need to plug in the gun again, the charging pile does not need to be started by swiping the card, and completely achieves the purpose of automatic switching charging. Moreover, multiple combined working conditions such as charging a single vehicle / inserting a second vehicle for charging during the charging of a single vehicle are supported. Moreover, the installation demand of the whole charging pile machine can be reduced, and the purpose of one machine for two purposes is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The content expressed by each drawing of the specification of the application and the marks in the drawings are briefly described as follows:

[0017] Figure 1 It is an electric circuit diagram of the charging pile in the state of no gun insertion or no charging of the application;

[0018] Figure 2 It is a principle diagram when the charging gun 1 is started to charge the vehicle of the application;

[0019] Figure 3 It is a principle diagram when the charging gun 2 is started to charge the vehicle of the application

[0020] Figure 4 It is a principle diagram that the power supply control device of the application is connected to the charging gun through the switch S1;

[0021] Figure 5 It is a principle diagram that the CP terminal of the charging gun 1 is connected after the switch S1 is driven to rotate an angle of the application;

[0022] Figure 6 It is a principle diagram that the CP terminal of the charging gun 2 is connected after the switch S1 is driven to rotate an angle of the application. DETAILED DESCRIPTION

[0023] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0024] The prior art charging pile has only one AC charging gun. When charging, the charging gun is inserted into the charging port of the vehicle, and the power supply control device of the vehicle is interactively controlled. After the charging time setting and fee interaction are completed, the charging pile outputs AC power to charge the vehicle. This mode will cause other vehicles to be unable to use if the gun is not removed in time after one vehicle is fully charged, especially at night. Many vehicles choose to charge at night during the valley period. However, with the development of vehicle charging technology, four hours or even less time can complete full charging. Other vehicles cannot continue to charge before the gun is removed, resulting in low efficiency of the charging pile and the inability to meet the charging demand. To solve this problem, the embodiments of the present application change the AC charging pile based on the GBT 18487.1-2015 Electric Vehicle Conductive Charging System Part 1: General Requirements. The +12V range of the S1 switch is designed multiple times on the basis of the current AC charging pile equipped with only one power supply control device. A CP signal is added, and two relays K3 and K4 are added for on-off control of the L / N loop. The charging pile has two AC charging guns that meet the national standard. Without any changes to the vehicle, the function of continuously charging two vehicles can be realized, the convenience of AC charging is improved, the waste of repeatedly installing charging piles is reduced, more valley period electric energy is used, and the cost of using the vehicle is reduced. The specific scheme is as follows:

[0025] An AC double-gun charging control system of a charging pile includes a charging pile, a power supply control device, and a charging gun. The charging pile is used to output AC power to charge a vehicle. The charging pile is connected to the vehicle with the charging gun to send AC power into the vehicle to charge the vehicle. The power supply control device is used to interactively control the charging process of the charging pile. The charging gun is integrated with a CP and a CP signal terminal. After the charging gun is inserted into the charging port of the vehicle, the CC and CP signal terminal are connected to the vehicle charging control system. The power supply control device interactively controls the charging pile to complete the charging through the charging gun connected to the vehicle with the charging gun. The charging gun is provided as at least two. Each charging gun is respectively inserted into the charging port of a vehicle with the charging gun to complete the connection of the charging pile to the electrical loop of the vehicle with the charging gun. The charging control device is the core component of the charging gun switching control. The charging pile is sequentially charged by each charging gun through the on-off control of the electrical loop of the charging pile and the charging gun. The power supply control device only controls one charging gun to output AC power to meet the charging requirements of the vehicle, and one power supply control device realizes multiple AC charging outputs.

[0026] The power supply control device is the control core, which can be divided into two parts control when controlling switching each charging gun to output alternating current charging to the outside: 1, AC power supply part control: in the three-phase power output by the charging pile, a plurality of terminals are led out and connected to the charging terminals of each charging gun through the switch K; each charging gun shares the N line and PE line in the three-phase power output by the charging pile. Whether the three-phase power in the charging gun is conducted or not is controlled by controlling the switch K, so as to control whether each charging gun outputs charging to the outside; the PE line output by the charging pile is connected to the CC terminal of the corresponding charging gun through a series switch S and a resistor RC; a resistor R4 is connected in parallel across each switch S.

[0027] 2, low-voltage control part: the power supply control device has a 12V wake-up power supply and a PWM interaction signal terminal; the 12V wake-up power supply terminal and the PWM terminal are connected to one end of the multi-way switch S1, and the other end of the multi-way switch S1 is connected to the CP terminal of the corresponding charging gun through a resistor R1; the power supply control device controls the CP terminal of the charging gun to be connected to the 12V wake-up power supply terminal or the PWM terminal by driving the multi-way switch S1.

[0028] When switching control of each charging gun is performed, the low-voltage part is controlled by the switch S1, and the AC part is controlled by the switch K, so as to realize the switching control of different charging guns to charge different vehicles to be charged.

[0029] In a preferred embodiment of the present application, since general vehicle valley charging can only satisfy two vehicles for continuous charging, the charging time can cover the valley time, that is, for example, two vehicles are replaced for charging to the slow point for 4 hours, which also needs eight hours, at this time, it has completely exceeded the valley time, therefore, generally only two charging guns are needed, that is, an AC charging pile supports two AC charging guns for charging, which can meet the daily demand for valley period charging. Therefore, the charging gun of the embodiment is provided as two; for example, Figure 1As shown, the charging gun 1 and the charging gun 2 are respectively shown, wherein the CP terminal of the charging gun 1 is led out through the terminal CP1 by the resistor R1, and the CP terminal of the charging gun 2 is led out through the terminal CP2 by the resistor R1; the terminals CP1 and CP2 are connected to the multi-way switch S1; the other end of the multi-way switch S1 drives the multi-way switch S1 to select to connect the CP terminal of the charging gun to the 12V wake-up power terminal or the PWM terminal according to the control signal of the power supply control device, and the CP1 or CP2 is connected to the 12V terminal or the PWM terminal according to the control signal of the power supply control device, so as to realize the start of the external output power supply of the charging gun 1 and the charging gun 2; meanwhile, on the AC power supply control of the charging gun, the relay is provided, and the relay has the switch contacts K1, K2 and K3; the power supply control device realizes the conduction or not of the switch contacts K1, K2 and K3 by driving the action of the relay; the L1, L2 and L3 three-phase electricity from the AC charging pile is used as the fire line of the output AC power supply, and is uniformly represented by L, two branches are led out from the output AC L-phase bus of the AC charging pile, and the two branches are respectively the L_charging gun 1 branch and the L_charging gun 2 branch, and the L_charging gun 1 branch and the L_charging gun 2 branch are respectively connected to the charging terminals of the charging gun 1 and the charging gun 2; the switch K1 and the switch K3 are respectively provided in the L_charging gun 1 branch and the L_charging gun 2 branch, and are used for controlling the external output AC electricity of the charging gun 1 and the charging gun 2; wherein the charging gun 1 and the charging gun 2 share the N line and the PE line, that is, the N line of the charging pile is connected to the N line of the charging gun 1 and the charging gun 2 through the switch K2; the PE line is connected to the CC terminal (CC_charging gun 1) of the charging gun 1 after passing through the switch S3_charging gun 1 and the resistor RC; the PE line is connected to the CC terminal (CC_charging gun 2) of the charging gun 2 after passing through the switch S3_charging gun 2 and the resistor RC; the resistor R4 is provided in parallel between the switch S3_charging gun 1 and the switch S3_charging gun 2.

[0030] The power supply control device collects the voltage at the CP terminal of the charging gun 1 and the voltage at the CP terminal of the charging gun 2 through the first voltage collection module and the second voltage collection module respectively; and monitors the charging state based on the voltage, and the collected voltage can be obtained by resistance voltage division or adding a voltage sensor to obtain the voltage of the collection point, such as Figure 1 As shown, the vehicle 1 detection point 1 is between the resistor R1 and the CP terminal of the charging gun 1; and the vehicle 2 detection point 1 is between the resistor R1 and the CP terminal of the charging gun 2.

[0031] The control method for the AC charging pile to output AC charging externally comprises: a power supply control device that monitors the connection state of two charging guns in real time; when both charging guns are inserted, the payment or charging order of both charging guns is obtained, after completing the payment or charging order, one of the charging guns is started to charge the vehicle after reaching the set start time, and after the vehicle charging is completed, the other charging gun is switched to external charging. When switching charging, the output of the AC power of the charging gun is controlled by the switch K; the connection of the charging gun CC terminal is controlled by controlling the switch S; the connection of the charging gun CP terminal is switched by the multi-way switch S1.

[0032] When the user confirms the required charging pile after swiping the card or connects to the charging pile through the Internet of Things mobile phone app, when only one charging gun is selected for charging, the charging gun needs to be turned on only after the charging gun reaches the set charging start time. When it is judged that two charging guns are selected for charging, that is, both charging guns are inserted and both are set for valley charging or the charging time of the two charging guns overlaps, the following scheme is adopted for charging control: the power supply control device obtains the charging information and judges whether it is time to start charging, if not, wait for both charging guns to be in the inserted gun state without charging. At this time, the power supply control device controls the switch S1 so that the 12V wake-up power supply terminals of the power supply control device are connected to CP1 and CP2. At this time, control K1, K2, K3 and switches S3_charging gun 1 and S3_charging gun 2 are turned off. When it is judged that the start time has been reached, the charging gun 1 and the charging gun 2 are controlled to output power in the order of charging gun 1 first and charging gun 2 second. The order refers to the time when the user inserts the charging gun or the time when the user pays the charging fee or the order of the set charging time to control the charging. The charging gun that charges first and the charging gun that charges second are determined. Then the first charging gun is controlled to charge and the second charging gun is controlled to charge. Taking the example of first charging gun 1 and then charging gun 2, when the charging gun 1 charges, the power supply control device controls CP1 to connect to the PWM terminal and CP2 to connect to the 12V terminal through the switch S1, and then controls K1 to close, K2 to close and K3 to open, and the switch S3_charging gun 1 to close and the switch S3_charging gun 2 to open. Until the charging is completed, the charging gun 2 is switched to charge, that is, the power supply control device controls CP2 to connect to the PWM terminal and CP1 to connect to the 12V terminal through the switch S1, and then controls K3 to close, K2 to close and K1 to open, and the switch S3_charging gun 2 to close and the switch S3_charging gun 1 to open. Until the vehicle is fully charged, the power supply control device controls CP1 and CP2 to connect to the 12V terminal through the switch S1, and K1-K3 and the switches S3_charging gun 1 and S3_charging gun 2 are all turned off. Conversely, when the charging gun 2 charges first, the power supply control device controls CP2 to connect to the PWM terminal and CP1 to connect to the 12V terminal through the switch S1, and then controls K3 to close, K2 to close and K1 to open, and the switch S3_charging gun 2 to close and the switch S3_charging gun 1 to open. Until the vehicle is fully charged, the charging gun 1 is switched to charge, that is, the power supply control device controls CP1 to connect to the PWM terminal and CP2 to connect to the 12V terminal through the switch S1, and then controls K1 to close, K2 to close and K3 to open, and the switch S3_charging gun 1 to close and the switch S3_charging gun 2 to open. Until the vehicle is fully charged, the power supply control device controls CP1 and CP2 to connect to the 12V terminal through the switch S1, and K1-K3 and the switches S3_charging gun 1 and S3_charging gun 2 are all turned off.

[0033] In a preferred embodiment of the present application, the 12V wake-up power terminal of the power supply control device has three terminals, a, b, and d; the multi-way switch S1 has two terminals connected to the CP terminals of the two charging guns through a resistor R1; the power supply control device drives the two terminals of the multi-way switch S1 to move and connects the terminals a, b, d, or the PWM terminal to the CP signal terminals of the two charging guns according to the moving angle or distance. The 12V wake-up power terminal has three terminals a, b, d and the PWM terminal c, which are points on a circle, and when rotating clockwise or counterclockwise along the circumference, the sequence of the terminals is terminal a, terminal b, terminal c, and terminal d; the CP terminal of the charging pile 1 is led out through the resistor terminal CP1, and the CP terminal of the charging pile 2 is led out through the resistor terminal CP2; the terminals CP1 and CP2 are arranged on the driving mechanism, and the driving mechanism drives the terminals CP1 and CP2 to move along the circumference, and when the initial position, the CP1 terminal is in contact with the terminal 2 for conduction; the CP2 terminal is in contact with the terminal B for conduction; under the rotation of the driving structure, the CP1 terminal is in contact with the terminals a, b, and c for conduction in turn; under the rotation of the driving structure, the CP2 terminal is in contact with the terminals b, c, and d for conduction in turn.

[0034] Preferably, the driving structure includes a motor driving circuit, a motor, and a sector-shaped substrate, the motor driving circuit is used to drive the motor, and the motor is used to drive the sector-shaped substrate to rotate; wherein the four contacts a, b, c, and d are arranged on the circumference of a circle, and the arrangement sequence is dcb a along the clockwise direction; this circle is called the basic circle, and the radii between the positions of the four contacts a, b, c, and d and the center of the basic circle are r1, r2, r3, and r4 respectively, and the angles between the radii are a1, a2, and a3 respectively, and the angles a1, a2, and a3 are all set to be α; at the same time, a sector-shaped substrate is arranged in the sector-shaped area formed by the center position, the positions of a and b, and the contacts CP1 and CP2 are arranged at the positions corresponding to a and b in the sector-shaped area, so that CP1 is in contact with contact b for conduction and CP2 is in contact with contact a for conduction; when different charging guns need to be switched to charge externally, the motor is driven to rotate by the driving circuit to drive the sector-shaped substrate to rotate, and after rotating an angle a, CP1 is in contact with contact c for conduction and CP2 is in contact with contact b for conduction; after rotating another angle a, CP1 is in contact with contact d for conduction and CP2 is in contact with contact c for conduction, so as to switch to the external charging of the charging gun 2; when the charging is completed, the motor is reversed by 2a degrees to return to the initial position, at this time, CP1 is in contact with contact b for conduction and CP2 is in contact with contact a for conduction, so as to complete the switching control of the charging guns 1 and 2 after being powered on.

[0035] In the present scheme, the alternating current charging pile has two charging guns, Figures 1-6In the single-phase example, the L2 / L3 of the three-phase charging is the same as the L in the figure, and is not drawn separately; N, PE, and L are shared by the two charging guns, which are divided into L_charging gun 1 and L_charging gun 2; the signal line CC is divided into CC_charging gun 1 and CC_charging gun 2; the S1 switch of the internal power supply control device of the alternating current charging pile is designed as a double-channel, which corresponds to CP_charging gun 1 and CP_charging gun 2 respectively; the +12V loop of the internal power supply control device of the alternating current charging pile is designed as one slipper and one independent contact.

[0036] In the state of no charging gun insertion, the S1 switch is in the +12V position, and CP_charging gun 1 and CP_charging gun 2 are respectively closed with the slipper b point and the slipper a point through the mutually isolated loops;

[0037] In the state of charging gun insertion without charging, the S1 switch is in the +12V position, and CP_charging gun 1 and CP_charging gun 2 are respectively closed with the slipper b point and the slipper a point through the mutually isolated loops;

[0038] In the state of charging end, the S1 switch is in the +12V position, and CP_charging gun 1 and CP_charging gun 2 are respectively closed with the slipper b point and the slipper a point through the mutually isolated loops;

[0039] After inserting the charging gun 1, when charging the vehicle 1, the S1 switch is rotated by the stepping motor by an angle a, so that CP_charging gun 1 is closed with the contact c, and a PWM square wave is output, while CP_charging gun 2 remains closed with the slipper, and +12V is maintained; in the charging process, K1 of L1 is closed, K2 of N is closed, and 220VAC is output; K3 of L3 remains open; if the user does not insert the charging gun 1, but directly inserts the charging gun 2, the charging pile judges that the charging gun 1 is not inserted according to the voltage of point 1 of the vehicle 1, and directly skips this state to enter the next state;

[0040] When the vehicle 1 completes charging, the charging of the vehicle 2 is started, the S1 switch is rotated by the stepping motor by an angle a again, so that CP_charging gun 1 is closed with the contact d, and +12V is output, while CP_charging gun 2 is closed with the contact c, and a PWM square wave is output;

[0041] In the charging process, K3 of L3 is closed, K2 of N remains closed, and 220VAC is output; K1 of L1 is open; if the user does not insert the charging gun 2, the charging pile judges that the charging gun 2 is not inserted according to the voltage of point 1 of the vehicle 2, and directly skips the charging state of the vehicle 2, the S1 returns to the initial position of Figure 1 , and the whole charging process is ended.

[0042] The main feature of this invention is the installation of a power supply control device within a single charging station, comprising two charging guns sharing the same internal power supply control unit. The core of this invention lies in the optimization of the CP circuit within the power supply control device. An S1 switch (connected to the dual CP signal lines) is designed to allow simultaneous control of the switching between the two CP signals with a single action of the S1 switch. The S1 switch is a stepper motor design, and the angle between CP_charging gun 1 and CP_charging gun 2 is a predetermined value α. The initial position is shown below. Figure 4 .

[0043] Meanwhile, the +12V circuit is changed to have one slider and one independent contact design. A and b are connected by a conductor slider. The angle between slider a, slider b, and S1 is α; the angle between slider b, contact c, and S1 is α; the angle between contact c, contact d, and S1 is α; and the angle of S1's operation is set to α or 2α.

[0044] When the charging gun is not plugged in, or plugged in but not charging, or charging has stopped, S1 remains in the following position: Figure 4 Initially, both CP_charging gun 1 and CP_charging gun 2 have a voltage of +12V. After the user starts the charging station, the charging station determines the vehicle that needs charging based on CP: if the voltage at detection point 1 of CP1 is 9V, then S1 rotates by an angle α, such as... Figure 5 As shown in the status; if the detection point 1 of CP1 is 12V, then S1 rotates by an angle of 2α, as follows. Figure 6 The status is shown;

[0045] Figure 5 Under normal operating conditions, CP_charging gun 1 closes with contact c, outputting a PWM square wave. Once vehicle 1 closes switch S2, charging can begin according to the national standard procedure. At this time, CP_charging gun 2 closes with slider b, maintaining a +12V output. The vehicle remains in its original state without change, waiting for charging to begin.

[0046] When vehicle 1 has finished charging, if CP2's detection 1 shows 9V, then S1 rotates by an angle α, as follows. Figure 6 As shown in the status; when vehicle 1 has finished charging, if CP2's detection 1 is 12V, then S1 rotates in the opposite direction by angle α, as shown. Figure 4 The status is shown; Figure 6 Under operating conditions, CP_charging gun 2 closes with contact c, outputting a PWM square wave. Once vehicle 2 closes switch S2, charging can proceed according to the national standard procedure. At this time, CP_charging gun 1 closes with contact d, outputting +12V.

[0047] After vehicle 2 finishes charging, switch S1 returns to its original state. Figure 4 The system allows users to select the initial position and end the charging process. Charging two vehicles requires only one card swipe, enabling sequential card swiping while also supporting charging a single vehicle.

[0048] When the vehicle charging is controlled, the charging pile enters the charging order information through user card swiping, code scanning or vehicle networking access to the control system of the charging pile, and after the charging order information is completed, the power supply control module controls the two charging guns according to the charging time of the order information, and the separated and sequential charging control of the two charging guns with overlapping charging time is realized through the control of switch S1 and relays K1-K3, so that the purpose of separate and sequential power supply control of the two chargers of one charging pile is met.

[0049] Obviously, the specific implementation of the present application is not limited by the above-mentioned manner, and various non-essential improvements made by adopting the method concept and technical solution of the present application are within the protection scope of the present application.

Claims

1. A dual-gun AC charging control system for a charging pile, comprising a charging pile, a power supply control device, and a charging gun; the charging gun integrates a CC signal terminal and a CP signal terminal, which are connected to the vehicle charging control system after the charging gun is inserted into the vehicle's charging port; the charging pile is connected to the vehicle to be charged via the charging gun to complete charging; characterized in that: The charging guns are at least two in number and are respectively connected to the charging ports of the vehicles to be charged. The power supply control device is used to control the charging pile to charge the vehicles to be charged sequentially through each charging gun. The power supply control device has a 12V wake-up power supply and a PWM interaction signal terminal. The 12V wake-up power supply terminal and the PWM terminal are both connected to one end of a multiplexer S1. The other end of the multiplexer S1 is connected to the CP signal terminal of the corresponding charging gun through a first resistor R1. The power supply control device controls the CP signal terminal of the charging gun to connect to the 12V wake-up power supply terminal or the PWM terminal by driving the multiplexer S1. There are two charging guns, namely charging gun one and charging gun two. The CP signal terminal of charging gun one is connected to multiplexer S1 via a first resistor R1. The CP signal terminal of charging gun two is connected to multiplexer S1 via a first resistor R1. The other end of multiplexer S1 is driven by the control signal of the power supply control device to select whether to connect the CP signal terminal of the charging gun to the 12V wake-up power terminal or the PWM terminal. The 12V wake-up power terminal of the power supply control device has three terminals, namely a, b, and d; the multiplexer S1 has two terminals, which are respectively connected to the CP signal terminals of the two charging guns through a first resistor R1; the power supply control device drives the two terminals of the multiplexer S1 to move through the drive module and realizes, according to the moving angle or distance, that the a, b, d terminals or the PWM terminals are respectively or simultaneously connected to the CP signal terminals of the two charging guns. The 12V wake-up power supply terminal has three terminals a, b, and d, and a PWM terminal c, all of which are points on a circle. When rotating clockwise or counterclockwise around the circumference, the terminals are passed in the following order: terminal a, terminal b, terminal c, and terminal d. The CP signal terminal of charging gun one is led out to terminal CP1 through the first resistor R1, and the CP signal terminal of charging gun two is led out to terminal CP2 through the first resistor R1. Terminals CP1 and CP2 are both mounted on the drive mechanism. The drive mechanism drives terminals CP1 and CP2 to move along the circumference. In the initial position, terminal CP1 is in contact with terminal a and conducts; terminal CP2 is in contact with terminal b and conducts. Under the rotation of the drive mechanism, terminal CP1 sequentially contacts and conducts with terminals a, b, and c; under the rotation of the drive mechanism, terminal CP2 sequentially contacts and conducts with terminals b, c, and d.

2. The AC dual-gun charging control system for a charging pile as described in claim 1, characterized in that: In the three-phase AC power output from the charging pile, the multi-phase terminals of the three phases are respectively led out and connected to the charging terminals of each charging gun via switch K; each charging gun shares the N line and PE line in the three-phase power output from the charging pile.

3. The AC dual-gun charging control system for a charging pile as described in claim 2, characterized in that: The PE line output from the charging pile is connected to the CC signal terminal of the corresponding charging gun via a series switch S and a resistor RC; a resistor R4 is connected in parallel across each switch S.

4. The AC dual-gun charging control system for a charging pile as described in claim 1, characterized in that: The power supply control device acquires the voltage at the CP signal terminal of charging gun one and the voltage at the CP signal terminal of charging gun two through the first voltage acquisition module and the second voltage acquisition module, respectively; and monitors the charging status based on the voltage.

5. The control method for a charging pile AC dual-gun charging control system as described in any one of claims 1-4, characterized in that: The method includes a power supply control device that monitors the connection status of the two charging guns in real time; when both charging guns are inserted, the device obtains the payment or charging order for both charging guns; after the payment or charging order is completed, one of the charging guns is started to charge the vehicle after the set start time is reached; and after the vehicle is fully charged, the other charging gun is switched to charge the vehicle.

6. The control method of the AC dual-gun charging control system for charging piles as described in claim 5, characterized in that: When switching charging, switch K controls the AC output of the charging gun; switch S controls whether the CC signal terminal of the charging gun is connected or not; and switch S1 controls whether the CP signal terminal of the charging gun is connected or not.

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