A charging station, an MW super-charging station and a power supply control method

Abstract

The application provides a charging station, an MW super-charging charging station and a power supply control method, relates to the technical field of charging station power supply control, and the charging station comprises a central rectifier and multiple ordinary charging piles, the ordinary charging piles are divided into multiple groups, each group comprises: a first power converter, an input end of the first power converter is connected to an output end of the central rectifier, first parallel branches are connected between output ends of the first power converters of different groups, and first controllable switches are arranged on the first parallel branches; and a first charging gun, an input end of the first charging gun is connected to an output end of the first power converter, and a second controllable switch is arranged between the input end of the first charging gun and the output end of the first power converter. The application can reduce energy waste of the charging station, improve energy utilization, and has strong practicability.

Description

Technical Field

[0001] This application relates to the field of power supply control technology for charging stations, specifically to a charging station, a MW supercharging station, and a power supply control method. Background Technology

[0002] When providing power to traditional electric vehicles, charging piles are generally used as dedicated equipment. They restore the vehicle's range by transmitting electrical energy from the power grid to the electric vehicle's power battery. They are an indispensable basic equipment in the electric vehicle industry chain. In order to facilitate the travel of electric vehicles, charging stations integrating a large number of charging piles have been built in various regions, so that electric vehicles can find the nearest charging station to charge when the battery is low.

[0003] In charging stations located in low-temperature areas such as high altitudes and high latitudes, it is usually necessary to heat the inside of all charging piles to ensure that they can all be put into standby mode so that vehicles can be charged immediately when they arrive. However, on certain dates or during certain times of day, such as during the off-season or late at night at charging stations in tourist areas on plateaus, there may be less traffic. If all charging piles are kept in standby mode all the time, it will lead to energy waste. Summary of the Invention

[0004] To address the aforementioned deficiencies in existing technologies, this application provides a charging station, a MW supercharging station, and a power supply control method, which can reduce energy waste in charging stations, improve energy utilization, and has strong practicality.

[0005] To achieve the above objectives, the present invention employs the following techniques:

[0006] A charging station includes a central rectifier and multiple ordinary charging piles, wherein the ordinary charging piles comprise multiple sets, and each set includes:

[0007] The first power converter has its input terminal connected to the output terminal of the central rectifier, and the output terminals of different groups of first power converters are all connected to a first parallel branch, and a first controllable switch is provided on the first parallel branch.

[0008] The first charging gun has its input end connected to the output end of the first power converter, and a second controllable switch is provided between the input end of the first charging gun and the output end of the first power converter.

[0009] A power supply control method for a charging station, used to control the power supply of the charging station, the method comprising the following steps:

[0010] The ordinary charging piles in the same group are numbered sequentially from 1 to X, and a variable value R is introduced;

[0011] Close the second controllable switch of the first ordinary charging pile in each group, and keep the other first and second controllable switches in the open state.

[0012] When a vehicle arrives, guide it to the Nth ordinary charging pile where the second controllable switch is closed;

[0013] Determine if N is equal to X; if the result is no, R = N + 1; if the result is yes, R = 1.

[0014] During charging, the first controllable switch between the Nth ordinary charging pile and the Rth ordinary charging pile is closed, and the first power converter of the Nth ordinary charging pile and the first power converter of the Rth ordinary charging pile provide power to the first charging gun of the Nth ordinary charging pile, and the vehicle is charged through the first charging gun of the Nth ordinary charging pile.

[0015] After charging is complete, disconnect the second controllable switch of the Nth ordinary charging pile, disconnect the first controllable switch between the Nth and Rth ordinary charging piles, and close the second controllable switch of the Rth ordinary charging pile.

[0016] A MW supercharging station includes the charging station and at least one MW supercharging pile, wherein the MW supercharging pile includes:

[0017] The second power converter has its input terminal connected to the central rectifier. The output terminal of the second power converter and the output terminal of the first power converter are both connected to a second parallel branch. A third controllable switch is provided on the second parallel branch.

[0018] The second charging gun has its input end connected to the output end of the second power converter, and a fourth controllable switch is provided between the input end of the second charging gun and the output end of the second power converter.

[0019] A power supply control method for a MW supercharging station, used to control the power supply of the MW supercharging station, the method includes the following steps:

[0020] Close the fourth controllable switch of each MW supercharging pile, and keep the remaining first, second, and third controllable switches in the open state.

[0021] When a vehicle arrives at a regular charging station, the fourth controllable switch of the Mth MW supercharging station is disconnected, while the third controllable switch between the Mth MW supercharging station and the regular charging station of the arriving vehicle is closed, as well as the second controllable switch of the regular charging station of the arriving vehicle is closed. Power is supplied to the first charging gun of the regular charging station of the arriving vehicle through the second power converter of the Mth MW supercharging station and the first power converter of the regular charging station of the arriving vehicle, and the vehicle is charged through the first charging gun of the regular charging station of the arriving vehicle. After charging is completed, the third controllable switch between the Mth MW supercharging station and the regular charging station of the arriving vehicle is disconnected, as well as the second controllable switch of the regular charging station of the arriving vehicle is disconnected, and the fourth controllable switch of the Mth MW supercharging station is closed again.

[0022] When a vehicle arrives at a MW Supercharger, power is supplied directly through the second power converter of the MW Supercharger for that vehicle, and the vehicle is charged through the second charging gun of the MW Supercharger for that vehicle.

[0023] The beneficial effects of this invention are as follows:

[0024] By grouping and connecting multiple charging piles in parallel, and allowing them to be used in rotation, during periods of low temperature and low usage frequency, only one charging pile in each group remains in standby mode, while the rest are in a low-power state, thus reducing overall energy consumption. In charging stations with MW supercharging piles, by connecting MW supercharging piles in parallel with ordinary charging piles, during periods of low temperature and low usage frequency, the ordinary charging piles are all in a low-power state, further reducing overall energy consumption and improving energy utilization. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a charging station according to an embodiment of this application.

[0026] Figure 2 This is a flowchart illustrating the power supply control method for a charging station according to an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of the first power converter connected in parallel in an embodiment of this application when providing power.

[0028] Figure 4 This is a schematic diagram of the structure of a MW supercharging station according to an embodiment of this application. Figure 1 .

[0029] Figure 5 This is a schematic diagram of the structure of a MW supercharging station according to an embodiment of this application. Figure 2 .

[0030] Figure 6This is a flowchart illustrating the power supply control method for a MW supercharging station according to an embodiment of this application.

[0031] Figure 7 This is a schematic diagram of the first and second power converters connected in parallel in an embodiment of this application when providing power.

[0032] Figure 8 This is a schematic diagram of the charging station's working state during charging, according to an embodiment of this application. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention will be described in detail below with reference to the accompanying drawings. However, the embodiments described in this invention are only some embodiments of the present invention, and not all embodiments.

[0034] like Figure 1 As shown in one aspect of the embodiments of this application, a charging station is provided, including a central rectifier and multiple ordinary charging piles, wherein the ordinary charging piles include multiple groups, and each ordinary charging pile includes a first power converter and a first charging gun.

[0035] Specifically, such as Figure 1 As shown, the input terminal of the first power converter is connected to the output terminal of the central rectifier, and the output terminals of different first power converters are all connected to a first parallel branch. A first controllable switch is provided on the first parallel branch to realize the parallel use of any number of first power converters.

[0036] Specifically, such as Figure 1 As shown, the input terminal of the first charging gun is connected to the output terminal of the first power converter, and a second controllable switch is provided between the input terminal of the first charging gun and the output terminal of the first power converter.

[0037] With this design, the central rectifier provides power to the entire charging station, the first power converter provides power to the first charging gun on the ordinary charging pile and the heater and other components inside the ordinary charging pile, and the second controllable switch controls the connection between the first power converter and the first charging gun and the heater and other components inside the ordinary charging pile.

[0038] Preferred, such as Figure 1 As shown, the ordinary charging piles in the same group are arranged in a linear pattern. The first parallel branch is set between the ordinary charging piles in the same group and between the ordinary charging piles at both ends of the linear arrangement. This design makes the wiring of the first parallel branch more orderly, which is convenient for subsequent fault diagnosis and line maintenance.

[0039] like Figure 2As shown, another aspect of this application provides a power supply control method for a charging station, used to control the power supply to the charging station described in the foregoing embodiments. The method includes the following steps:

[0040] S110. Number the ordinary charging piles in the same group sequentially as 1~X, and introduce a variable value R.

[0041] S120. Close the second controllable switch of the first ordinary charging pile in each group of ordinary charging piles, and keep the other first and second controllable switches in the open state.

[0042] S130. When a vehicle arrives, guide it to the Nth ordinary charging pile where the second controllable switch is closed.

[0043] S140. Determine whether N is equal to X; if the determination is no, R = N + 1; if the determination is yes, R = 1.

[0044] S150. During charging, the first controllable switch between the Nth ordinary charging pile and the Rth ordinary charging pile is closed. Power is supplied to the first charging gun of the Nth ordinary charging pile through the first power converter of the Nth ordinary charging pile and the first power converter of the Rth ordinary charging pile, and the vehicle is charged through the first charging gun of the Nth ordinary charging pile.

[0045] S160. After charging is complete, disconnect the second controllable switch of the Nth ordinary charging pile, disconnect the first controllable switch between the Nth and Rth ordinary charging piles, and close the second controllable switch of the Rth ordinary charging pile.

[0046] When the ambient temperature is below a set threshold and the charging station is in a low-frequency usage period, it enters a low-temperature energy-saving management mode, which is the charging station power supply control method of this application embodiment. In this mode, it is ensured that at least one ordinary charging pile in each group is in standby mode, that is, as described in S120, the second controllable switch of the ordinary charging pile is in the closed state, its internal heater and other components are in the working state, and its first charging gun is in the connected state, so as to charge the incoming vehicle at any time; while the other ordinary charging piles are in low-power mode, that is, as described in S120, the other second controllable switches are in the open state. With this design, the total power consumption of the charging station can be effectively reduced during the low-temperature and low-frequency usage period, so as to achieve the purpose of energy saving.

[0047] However, if a regular charging station in low-power mode is not used for a long time at low temperatures, it may cause malfunctions such as abnormal power-on when it is used again. Therefore, this application embodiment adopts a mode of parallel operation of multiple power converters to solve this problem.

[0048] In this mode, the first power converter of a regular charging pile in standby mode is connected in parallel with the first power converter of at least one other regular charging pile in low-power mode via the first controllable switch on the first parallel branch. This is as described in S150, where the first controllable switch between the Nth and Rth regular charging piles is closed. Another regular charging pile in low-power mode is activated, and they both charge the same vehicle. This is as described in S150, where the first power converters of the Nth and Rth regular charging piles provide power to the first charging gun of the Nth regular charging pile, and the vehicle is charged through the first charging gun of the Nth regular charging pile. The operating state of the charging station at this time is as follows: Figure 8 As shown, Figure 8 The middle arrow indicates the direction of current flow.

[0049] When one ordinary charging pile is working, it will preheat another ordinary charging pile. After charging is completed, the charging pile will return to the low power consumption state from the standby state. At this time, the other ordinary charging pile will complete the preheating and remain in the standby state to welcome the next vehicle. That is, as described in S160, the second controllable switch of the Nth ordinary charging pile is disconnected, and the first controllable switch between the Nth and Rth ordinary charging piles is disconnected.

[0050] This design allows the charging station to switch to a regular charging station every time a vehicle arrives, ensuring that each regular charging station has a chance to work and preventing malfunctions caused by prolonged inactivity at low temperatures.

[0051] The numbering and variable values ​​mentioned in S110, and the judgment mentioned in S140, are used to enable the ordinary charging piles in the same group to work in a cyclical manner, further ensuring that each ordinary charging pile has the opportunity to work.

[0052] In a further preferred embodiment, S130 can use light guidance to guide the vehicle to the Nth ordinary charging pile where the second controllable switch is closed.

[0053] Furthermore, regarding the grouping of ordinary charging piles within the charging station, the number of groups can be determined based on the traffic volume during periods of low temperature and low frequency of use; the greater the traffic volume, the more groups are required.

[0054] Preferred, such as Figure 3 As shown, when power is supplied to the first charging gun of the Nth ordinary charging pile through the first power converter of the Nth ordinary charging pile and the first power converter of the Rth ordinary charging pile, the following steps are also included:

[0055] S151. Power is first supplied through the first power converter of the Nth ordinary charging pile.

[0056] S152. Gradually reduce the power of the first power converter of the Nth ordinary charging pile, and gradually increase the power of the first power converter of the Rth ordinary charging pile.

[0057] S153. When the power of the first power converter of the Nth ordinary charging pile is equal to the power of the first power converter of the Rth ordinary charging pile, the current total power remains unchanged until charging is completed.

[0058] Since the power converter of a regular charging pile in low-power mode has just been activated, it needs to be preheated by the first power converter of the regular charging pile that is already in standby mode. Therefore, the preferred solution of this application embodiment adopts a scheme to adjust the power distribution of the two parallel first power converters at the beginning stage of the parallel operation of the first power converters. That is, the power is mainly provided by the first power converter in standby mode first, and then the power is gradually reduced, while the power of the parallel first power converter is increased synchronously until the power of the two first power converters is equal. This design enables the newly activated power converter to be preheated gradually, which is more friendly to the service life of the device.

[0059] Preferably, the initial stage of the parallel operation of the first power converter is the pre-charging stage. The charging current required in this stage is relatively smaller than that during normal charging. That is, the current total power when the first power converter of the Nth ordinary charging pile begins to gradually reduce its power is less than the current total power when the power of the first power converter of the Nth ordinary charging pile remains unchanged. Pre-charging is an existing technology, mainly because in low-temperature environments, it is necessary to allow the car to gradually adapt to the charging current. Choosing the pre-charging stage as the power distribution adjustment for the parallel operation of the first power converter can make the preheating of the newly activated power converter more gradual.

[0060] like Figure 4 and Figure 5 As shown, in another aspect of the embodiments of this application, a MW supercharging station is provided, including the charging station as described above and at least one MW supercharging pile, wherein the MW supercharging pile includes a second power converter and a second charging gun.

[0061] Specifically, such as Figure 4 and Figure 5 As shown, the input terminal of the second power converter is connected to the central rectifier. The output terminal of the second power converter and the output terminal of the first power converter are both connected to a second parallel branch. A third controllable switch is provided on the second parallel branch to realize the parallel use of the second power converter and any first power converter.

[0062] Specifically, such as Figure 5As shown, the input terminal of the second charging gun is connected to the output terminal of the second power converter, and a fourth controllable switch is provided between the input terminal of the second charging gun and the output terminal of the second power converter.

[0063] With this design, the central rectifier provides power to the entire MW supercharger station, the second power converter provides power to the second charging gun on the MW supercharger and the heaters and other components inside the MW supercharger, and the fourth controllable switch controls the connection between the second power converter and the second charging gun and the heaters and other components inside the MW supercharger.

[0064] Preferred, such as Figure 4 As shown, the ordinary charging piles are divided into multiple teams with a number matching the MW supercharging piles. Each team of ordinary charging piles is matched with one MW supercharging pile, and the ordinary charging piles in the same group are all located in the same team. The second parallel branch is set between the matched MW supercharging piles and ordinary charging piles. This design makes the wiring of the second parallel branch more orderly, which is convenient for subsequent fault diagnosis and line maintenance.

[0065] like Figure 6 As shown, in another aspect of this application, a power supply control method for a MW supercharging station is provided for power supply control of the MW supercharging station described in the foregoing embodiments, comprising the following steps:

[0066] S210. Close the fourth controllable switch of each MW supercharging pile, and keep the remaining first, second, and third controllable switches in the open state.

[0067] S220. When a vehicle arrives at a regular charging station, disconnect the fourth controllable switch of the Mth MW supercharging station, simultaneously close the third controllable switch between the Mth MW supercharging station and the regular charging station of the arriving vehicle, and close the second controllable switch of the regular charging station of the arriving vehicle. Power is supplied to the first charging gun of the regular charging station of the arriving vehicle through the second power converter of the Mth MW supercharging station and the first power converter of the regular charging station of the arriving vehicle, and the vehicle is charged through the first charging gun of the regular charging station of the arriving vehicle. After charging is completed, disconnect the third controllable switch between the Mth MW supercharging station and the regular charging station of the arriving vehicle, and disconnect the second controllable switch of the regular charging station of the arriving vehicle, and reclose the fourth controllable switch of the Mth MW supercharging station.

[0068] S230. When a vehicle arrives at a MW supercharger, power is directly supplied through the second power converter of the MW supercharger of the arriving vehicle, and the vehicle is charged through the second charging gun of the MW supercharger of the arriving vehicle.

[0069] MW Supercharging, or megawatt supercharging technology, refers to fast charging technology with a charging power of one megawatt or more. It is generally used for vehicles such as heavy trucks that require high charging power. Because MW Supercharging stations have high power, and typically only one or two MW Supercharging stations are installed in a charging station, setting them to a low-power state like ordinary charging stations would require a long warm-up time before activation. This would also result in longer waiting times for heavy vehicles, such as heavy trucks, that can only be charged via MW Supercharging stations. Therefore, MW Supercharging stations can be kept in a low-power state, as described in S210, by closing the fourth controllable switch of each MW Supercharging station. Ordinary charging stations are in a low-power state when no vehicles are present. In the low-power state, as described in S210, all other second controllable switches are in the open state. When a car is charging through a regular charging station, its corresponding first power converter is activated, i.e., as described in S220, the second controllable switch of the regular charging station of the current car is closed. At the same time, the regular charging station is connected in parallel with the corresponding MW supercharging station to jointly supply power to the vehicle, i.e., as described in S220, the third controllable switch between the Mth MW supercharging station and the regular charging station of the current car is closed. Power is supplied to the first charging gun of the regular charging station of the current car through the second power converter of the Mth MW supercharging station and the first power converter of the regular charging station of the current car, and the vehicle is charged through the first charging gun of the regular charging station of the current car.

[0070] With this design, when the ambient temperature is below the set threshold and the charging station is in a low-frequency usage period, the ordinary charging piles in the MW Supercharger station are all in a low-power mode. When a vehicle arrives, both the MW Supercharger and ordinary charging piles can respond quickly, optimizing power supply control while ensuring working efficiency and saving energy consumption.

[0071] Preferred, such as Figure 7 As shown, when providing power to the first charging gun of the current vehicle's ordinary charging station through the second power converter of the Mth MW supercharging pile and the first power converter of the current vehicle's ordinary charging pile, the process also includes the following steps:

[0072] S221. Power is first supplied through the second power converter of the Mth MW supercharging pile.

[0073] S222. Gradually reduce the power of the second power converter of the Mth MW supercharging pile, and gradually increase the power of the first power converter of the current vehicle's ordinary charging pile.

[0074] S223. After the power of the first power converter of the current vehicle's ordinary charging pile reaches the power required for individual charging, the third controllable switch between the Mth MW supercharging pile and the current vehicle's ordinary charging pile is disconnected, and the fourth controllable switch of the Mth MW supercharging pile is closed again.

[0075] S221 and S222 serve the same purpose as the steps in a regular charging station, which is to preheat the regular charging piles. However, the difference is that after preheating, the second power converter of the MW supercharging pile will be deactivated to quickly prepare for the next vehicle. As described in S223, once the power of the first power converter of the regular charging pile of the current vehicle reaches the power required for individual charging, the third controllable switch between the Mth MW supercharging pile and the regular charging pile of the current vehicle will be disconnected, and the fourth controllable switch of the Mth MW supercharging pile will be closed again.

[0076] Preferred, such as Figure 6 As shown, when a vehicle arrives at a MW supercharging station, the following steps are also included:

[0077] S231. Immediately close the second controllable switch of the Mth ordinary charging pile connected to the MW supercharging pile of the currently approaching vehicle through the second parallel branch.

[0078] When a heavy truck enters the charging station to charge using the MW supercharging pile, it immediately selects one of the other ordinary charging piles to enter the standby mode, that is, as described in S231, it immediately closes the second controllable switch of the Mth ordinary charging pile connected to the MW supercharging pile of the currently arriving vehicle through the second parallel branch.

[0079] With this design, since heavy trucks take a long time to charge, it is necessary to immediately select a regular charging pile for preheating to prepare for subsequent vehicles. More preferably, during the working time of the MW supercharging pile, the S110~S160 mentioned above can be used to control the preheated regular charging pile, that is, the regular charging pile drives the nearby charging pile to preheat.

[0080] The above description is only a preferred embodiment of this application and is not intended to limit this application. Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application.

Claims

1. A power supply control method for a charging station, characterized in that, This is used for power supply control of the charging station, which includes a central rectifier and multiple ordinary charging piles. The ordinary charging piles are divided into multiple groups, each group including: The first power converter has its input terminal connected to the output terminal of the central rectifier, and the output terminals of different groups of first power converters are all connected to a first parallel branch, and a first controllable switch is provided on the first parallel branch. The first charging gun has its input end connected to the output end of the first power converter, and a second controllable switch is provided between the input end of the first charging gun and the output end of the first power converter. The method includes the following steps: The ordinary charging piles in the same group are numbered sequentially from 1 to X, and a variable value R is introduced; Close the second controllable switch of the first ordinary charging pile in each group, and keep the other first and second controllable switches in the open state. When a vehicle arrives, guide it to the Nth ordinary charging pile where the second controllable switch is closed; Determine if N is equal to X; if the result is no, R = N + 1; if the result is yes, R = 1. During charging, the first controllable switch between the Nth ordinary charging pile and the Rth ordinary charging pile is closed, and the first power converter of the Nth ordinary charging pile and the first power converter of the Rth ordinary charging pile provide power to the first charging gun of the Nth ordinary charging pile, and the vehicle is charged through the first charging gun of the Nth ordinary charging pile. After charging is complete, disconnect the second controllable switch of the Nth ordinary charging pile, disconnect the first controllable switch between the Nth and Rth ordinary charging piles, and close the second controllable switch of the Rth ordinary charging pile.

2. The charging station power supply control method according to claim 1, characterized in that, The ordinary charging piles in the same group are arranged in a linear pattern. The first parallel branch is set between the ordinary charging piles in the same group and between the ordinary charging piles at both ends of the linear arrangement.

3. The charging station power supply control method according to claim 1, characterized in that, When power is supplied to the first charging gun of the Nth ordinary charging pile through the first power converter of the Nth ordinary charging pile and the first power converter of the Rth ordinary charging pile, the following steps are also included: Power is first supplied through the first power converter of the Nth ordinary charging pile; Gradually reduce the power of the first power converter of the Nth ordinary charging pile, and gradually increase the power of the first power converter of the Rth ordinary charging pile. Once the power of the first power converter of the Nth ordinary charging pile is equal to the power of the first power converter of the Rth ordinary charging pile, the current total power remains unchanged until charging is complete.

4. The power supply control method for a charging station according to claim 3, characterized in that, The current total power of the first power converter of the Nth ordinary charging pile when it begins to gradually reduce its power is less than the current total power of the first power converter of the Nth ordinary charging pile when its power remains unchanged.

5. A power supply control method for a MW supercharging station, characterized in that, Used for power supply control of MW supercharging stations, wherein the MW supercharging station includes a charging station and at least one MW supercharging pile; The charging station includes a central rectifier and multiple standard charging piles. Each set of standard charging piles comprises: The first power converter has its input terminal connected to the output terminal of the central rectifier, and the output terminals of different groups of first power converters are all connected to a first parallel branch, and a first controllable switch is provided on the first parallel branch. The first charging gun has its input end connected to the output end of the first power converter, and a second controllable switch is provided between the input end of the first charging gun and the output end of the first power converter. MW supercharging stations include: The second power converter has its input terminal connected to the central rectifier. The output terminal of the second power converter and the output terminal of the first power converter are both connected to a second parallel branch. A third controllable switch is provided on the second parallel branch. The second charging gun has its input end connected to the output end of the second power converter, and a fourth controllable switch is provided between the input end of the second charging gun and the output end of the second power converter. The method includes the following steps: Close the fourth controllable switch of each MW supercharging pile, and keep the remaining first, second, and third controllable switches in the open state. When a vehicle arrives at a regular charging station, the fourth controllable switch of the Mth MW supercharging station is disconnected, while the third controllable switch between the Mth MW supercharging station and the regular charging station of the arriving vehicle is closed, as well as the second controllable switch of the regular charging station of the arriving vehicle is closed. Power is supplied to the first charging gun of the regular charging station of the arriving vehicle through the second power converter of the Mth MW supercharging station and the first power converter of the regular charging station of the arriving vehicle, and the vehicle is charged through the first charging gun of the regular charging station of the arriving vehicle. After charging is completed, the third controllable switch between the Mth MW supercharging station and the regular charging station of the arriving vehicle is disconnected, as well as the second controllable switch of the regular charging station of the arriving vehicle is disconnected, and the fourth controllable switch of the Mth MW supercharging station is closed again. When a vehicle arrives at a MW Supercharger, power is supplied directly through the second power converter of the MW Supercharger for the arriving vehicle, and the vehicle is charged through the second charging gun of the MW Supercharger for the arriving vehicle.

6. The power supply control method for a MW supercharging station according to claim 5, characterized in that, The ordinary charging piles are divided into multiple teams with a number matching the MW supercharging piles. Each team of ordinary charging piles is matched with one MW supercharging pile, and the ordinary charging piles in the same group are all located in the same team. The second parallel branch is set between the matched MW supercharging piles and ordinary charging piles.

7. The power supply control method for a MW supercharging station according to claim 5, characterized in that, When providing power to the first charging gun of the ordinary charging pile of the Mth MW supercharging pile through the second power converter of the Mth MW supercharging pile and the first power converter of the ordinary charging pile of the currently arriving vehicle, the method further includes the following steps: Power is first provided through the second power converter of the Mth MW supercharging pile; Gradually reduce the power of the second power converter of the Mth MW supercharging pile, and gradually increase the power of the first power converter of the ordinary charging pile of the currently arriving vehicle; Once the power of the first power converter of the ordinary charging pile of the approaching vehicle reaches the power required for individual charging, the third controllable switch between the Mth MW supercharging pile and the ordinary charging pile of the approaching vehicle is disconnected, and the fourth controllable switch of the Mth MW supercharging pile is closed again.

8. The power supply control method for a MW supercharging station according to claim 5, characterized in that, When a vehicle arrives at a MW supercharger, the second controllable switch of one of the ordinary charging piles connected to the MW supercharger of the arriving vehicle through the second parallel branch is immediately closed.

Images