CN112701685A

CN112701685A - Vehicle charging station and control method thereof

Info

Publication number: CN112701685A
Application number: CN202011583514.6A
Authority: CN
Inventors: 陈志权; 宋诗; 崔鑫; 程世超
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Hefei Zero Carbon Technology Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-04-23

Abstract

The embodiment of the invention discloses a vehicle charging station and a control method thereof. The vehicle charging station includes: the system comprises a control device, an energy storage device, a new energy power generation device and a charging device; the control device is electrically connected with the power grid, the energy storage device, the new energy power generation device and the charging device, and the energy storage device and the new energy power generation device are both electrically connected with the charging device; the control device is used for controlling at least one of the power grid, the energy storage device and the new energy power generation device to supply power to the charging device according to the relation between the total charging power of the vehicle in the vehicle charging station and the distribution network power of the power grid and the power utilization time period, so that the charging device charges the vehicle. According to the technical scheme of the embodiment of the invention, various selectable power supply modes are provided for the charging device of the vehicle according to the charging power requirement and the charging time period of the charging station, so that the charging requirement of the vehicle is met, the electricity consumption cost of the charging station is reduced, and the impact of the charging station on a power grid in the peak electricity consumption time period is reduced.

Description

Vehicle charging station and control method thereof

Technical Field

The embodiment of the invention relates to the field of new energy vehicles, in particular to a vehicle charging station and a control method thereof.

Background

The new energy vehicle is an automobile which adopts unconventional vehicle fuel as a power source (or adopts conventional vehicle fuel and a novel vehicle-mounted power device), integrates advanced technologies in the aspects of power control and driving of the vehicle, and is advanced in technical principle, new in technology and new in structure, such as an electric vehicle. With the rapid development of new energy vehicles, the construction of vehicle charging stations matched with the new energy vehicles is also brought into urban construction planning so as to meet the energy supply requirements of the new energy vehicles.

At present, the power consumption cost of the existing vehicle charging station is high, the power supply mode of the charging station is single, if the power supply system of the charging station breaks down or is in a charging peak, the charging station cannot normally operate, and the charging requirements of a plurality of vehicles are difficult to meet.

Disclosure of Invention

The embodiment of the invention provides a vehicle charging station and a control method thereof, which are used for meeting the charging requirement of a vehicle and reducing the electricity consumption cost of the charging station.

In a first aspect, an embodiment of the present invention provides a vehicle charging station, including: the system comprises a control device, an energy storage device, a new energy power generation device and a charging device;

the control device is electrically connected with a power grid, the energy storage device, the new energy power generation device and the charging device, and the energy storage device and the new energy power generation device are both electrically connected with the charging device;

the control device is used for controlling at least one of the power grid, the energy storage device and the new energy power generation device to supply power to the charging device according to the relation between the total charging power of the vehicles in the vehicle charging station and the distribution network power of the power grid and the power utilization time period, so that the charging device charges the vehicles.

Optionally, the new energy power generation device comprises hydrogen production equipment, hydrogen storage equipment and a fuel cell stack which are connected in sequence; the hydrogen production equipment is used for producing hydrogen, the hydrogen storage equipment is used for storing hydrogen, and the fuel cell stack is used for converting the hydrogen into electric energy; the control device is used for controlling the hydrogen production equipment, the hydrogen storage equipment and the fuel cell set.

Optionally, the electricity usage period comprises a first period; the control device is used for controlling the power grid to supply power to the energy storage device, the hydrogen production equipment and the charging device in the first period.

Optionally, the electricity usage period further comprises a second period; and the control device is used for controlling the power grid and the energy storage device to supply power to the charging device or controlling the power grid and the fuel cell pack to supply power to the charging device when the total charging power is greater than the distribution network power in the second time interval.

Optionally, the electricity usage period further comprises a second period; and the control device is used for controlling the power grid to supply power to the charging device and controlling the power grid to stop supplying power to the energy storage device and the hydrogen production equipment when the total charging power is less than or equal to the distribution network power in the second time interval.

Optionally, the new energy power generation device comprises a photovoltaic power generation assembly, and the electricity utilization time period further comprises a second time period; and the control device is used for controlling the photovoltaic power generation assembly to supply power to the charging device when the total charging power is less than or equal to the power generation power of the photovoltaic power generation assembly in the second time period.

Optionally, the new energy power generation device further comprises a hydrogen production device, a hydrogen storage device and a fuel cell stack which are connected in sequence; the hydrogen production equipment is used for producing hydrogen, the hydrogen storage equipment is used for storing hydrogen, and the fuel cell stack is used for converting the hydrogen into electric energy; the control device is used for controlling the hydrogen production equipment, the hydrogen storage equipment and the fuel cell stack;

and the control device is also used for controlling the photovoltaic power generation assembly and the energy storage device to supply power to the charging device or controlling the photovoltaic power generation assembly and the fuel battery pack to supply power to the charging device when the total charging power is greater than the power generation power of the photovoltaic power generation assembly in the second time period.

Optionally, the electricity consumption period includes a first period and a second period, the first period is a valley electricity period, and the second period is a non-valley electricity period.

In a second aspect, an embodiment of the present invention further provides a control method of a vehicle charging station, where the vehicle charging station includes: the system comprises a control device, an energy storage device, a new energy power generation device and a charging device; the control device is electrically connected with a power grid, the energy storage device, the new energy power generation device and the charging device, and the energy storage device and the new energy power generation device are both electrically connected with the charging device;

the control method of the vehicle charging station includes:

and controlling at least one of the power grid, the energy storage device and the new energy power generation device to supply power to the charging device by the control device according to the relation between the total charging power of the vehicle in the vehicle charging station and the distribution network power of the power grid and the power utilization time period so as to charge the vehicle by the charging device.

Optionally, the new energy power generation device comprises hydrogen production equipment, hydrogen storage equipment and a fuel cell stack which are connected in sequence; the hydrogen production equipment is used for producing hydrogen, the hydrogen storage equipment is used for storing hydrogen, and the fuel cell stack is used for converting the hydrogen into electric energy; the control device is used for controlling the hydrogen production equipment, the hydrogen storage equipment and the fuel cell stack; the electricity usage period comprises a first period;

the control method of the vehicle charging station includes:

and controlling the power grid to supply power to the energy storage device, the hydrogen production equipment and the charging device through the control device in the first period.

Optionally, the electricity usage period further comprises a second period;

the control method of the vehicle charging station further includes:

and when the control device is in the second time interval and the total charging power is greater than the distribution network power, controlling the power grid and the energy storage device to supply power to the charging device, or controlling the power grid and the fuel cell pack to supply power to the charging device.

Optionally, when the total charging power is greater than the distribution network power in the second time period, the control device controls the power grid and the energy storage device to supply power to the charging device, and when the electric energy of the energy storage device is exhausted or the energy storage device fails, the control device controls the power grid and the fuel cell pack to supply power to the charging device.

Optionally, the electricity usage period further comprises a second period;

the control method of the vehicle charging station further includes:

and when the total charging power is less than or equal to the distribution network power in the second time interval through the control device, controlling the power grid to supply power to the charging device, and controlling the power grid to stop supplying power to the energy storage device and the hydrogen production equipment.

Optionally, the new energy power generation device comprises a photovoltaic power generation assembly, and the electricity utilization time period further comprises a second time period;

the control method of the vehicle charging station further includes:

and controlling the photovoltaic power generation assembly to supply power to the charging device when the control device is in the second time period and the total charging power is less than or equal to the power generation power of the photovoltaic power generation assembly.

the control method of the vehicle charging station further includes:

when the control device is in the second time interval and the total charging power is larger than the power generation power of the photovoltaic power generation assembly, the photovoltaic power generation assembly and the energy storage device are controlled to supply power to the charging device, or the photovoltaic power generation assembly and the fuel cell pack are controlled to supply power to the charging device.

The vehicle charging station provided by the embodiment of the invention comprises a control device, an energy storage device, a new energy power generation device and a charging device, wherein the control device is electrically connected with a power grid, the energy storage device, the new energy power generation device and the charging device, both the energy storage device and the new energy power generation device are electrically connected with the charging device, and at least one of the power grid, the energy storage device and the new energy power generation device is controlled to supply power to the charging device by the control device according to the relation between the total charging power of vehicles in the vehicle charging station and the distribution network power of the power grid and the power consumption time period, so that the charging device charges the vehicles. According to the technical scheme of the embodiment of the invention, at least one of the power grid, the energy storage device and the new energy power generation device is selected to supply power to the charging device according to the relation between the total charging power of the vehicle and the distribution network power of the power grid and the power utilization time period, and the power utilization capacity expansion of the vehicle charging station is not needed, so that multiple selectable power supply modes can be provided for the charging device of the vehicle according to the charging power requirement and the charging time period of the charging station, the charging requirement of the vehicle is met, the problem that the charging station cannot normally run and the charging requirement of the vehicle is difficultly met when the charging station is in the charging peak period or the power supply system fails in the prior art is solved, the power utilization cost of the charging station is favorably reduced, and the impact of the charging station on the power grid in the power utilization peak period is.

Drawings

Fig. 1 is a schematic block diagram of a vehicle charging station according to an embodiment of the present invention;

FIG. 2 is a block diagram of another vehicle charging station according to an embodiment of the present invention;

FIG. 3 is a block diagram of another vehicle charging station according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating a control method of a vehicle charging station according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating another control method for a vehicle charging station according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

An embodiment of the present invention provides a vehicle charging station, and fig. 1 is a schematic block diagram of a vehicle charging station according to an embodiment of the present invention. As shown in fig. 1, the vehicle charging station includes: the control device 10, the energy storage device 20, the new energy power generation device 30 and the charging device 40; the control device 10 is electrically connected with the power grid 50, the energy storage device 20, the new energy power generation device 30 and the charging device 40, and both the energy storage device 20 and the new energy power generation device 30 are electrically connected with the charging device 40; the control device 10 is configured to control at least one of the power grid 50, the energy storage device 20 and the new energy power generation device 30 to supply power to the charging device 40 according to a relationship between a total charging power of the vehicle in the vehicle charging station and a distribution network power of the power grid 50 and a power consumption period, so that the charging device 40 charges the vehicle.

Specifically, the vehicle charging station provided by the embodiment can charge a new energy vehicle, wherein the new energy vehicle can be an electric vehicle. The energy storage device 20 is used for storing electric energy, and the energy storage device 20 may include a large-capacity energy storage battery or an energy storage capacitor, for example. The new energy power generation device 30 refers to a device that generates power by using unconventional energy, wherein the new energy is various energy sources other than conventional energy sources, for example, the new energy may be hydrogen energy, solar energy, wind energy, and the like. The charging device 40 is used to charge the vehicle, for example, the charging device 40 may include a charging post. The power grid 50 refers to the power network to which the vehicle charging station belongs. The control device 10 is electrically connected with the power grid 50, the energy storage device 20, the new energy power generation device 30 and the charging device 40 to control at least one of the power grid 50, the energy storage device 20 and the new energy power generation device 30 to supply power to the charging device 40 according to needs, so that the charging device 40 can charge the vehicle.

The total charging power of the vehicles in the vehicle charging station refers to the total charging power of the plurality of vehicles currently required to be charged at the vehicle charging station, that is, the total power load of the plurality of charging loads currently on the vehicle charging station. The distribution network power of the power grid 50 refers to the total power supplied by the power system to the power network to which the vehicle charging station belongs. The electricity utilization time period is an electricity utilization time period of the vehicle charging station, for example, the electricity utilization time period may be divided into a valley electricity time period and a non-valley electricity time period, where the valley electricity time period may mean a time period in which electricity is charged by using a valley electricity price, and the non-valley electricity time period means a time period in a day except the valley electricity time period, of course, the division manner of the electricity utilization time period is not limited thereto, for example, the electricity utilization time period may also be divided into a night time period and a day time period, which is not limited in this embodiment. The control device 10 may control at least one of the power grid 50, the energy storage device 20 and the new energy power generation device 30 to supply power to the charging device 40 according to a relationship between a total charging power of the vehicle in the vehicle charging station and a distribution network power of the power grid 50 and a power consumption period, and for example, different charging modes of the vehicle charging station will be described below by dividing the power consumption period into a valley power period and a non-valley power period:

in the valley electricity period, because the electricity consumption cost is low, the control device 10 can directly control the power grid 50 to supply power to the charging device 40, so as to ensure that the charging device 40 can normally charge the vehicle; in the off-peak electricity period, when the total charging power of the vehicle is less than or equal to the distribution network power of the power grid 50, the distribution network power of the power grid 50 can meet the charging requirement of the vehicle in the vehicle charging station, so the control device 10 can directly control the power grid 50 to supply power to the charging device 40, so as to ensure that the charging device 40 can normally charge the vehicle, and because the charging requirement of the vehicle is not high at this time, even if the charging device 40 is supplied with power through the power grid 50 in the off-peak electricity period, the charging cost of the vehicle charging station is not too high, and the consideration of electricity economy is met; in off-peak electricity periods, and when the total charging power of the vehicle is greater than the distribution network power of the power network 50, the distribution network power of the power network 50 cannot meet the charging requirement of the vehicle in the vehicle charging station, so the control device 10 can control the energy storage device 20 and the new energy power generation device 30 to serve as a supplementary power supply mode for supplying power to the power network 50, for example, control the power network 50 to supply power to a part of the charging devices 40 in the vehicle charging station, and simultaneously control the energy storage device 20 and/or the new energy power generation device 30 to supply power to another part of the charging devices 40 in the vehicle charging station, so as to meet the charging requirement of the vehicle and avoid the impact of the vehicle charging station on the power network.

Fig. 2 is a schematic block diagram of another vehicle charging station according to an embodiment of the present invention, and as shown in fig. 2, on the basis of the above embodiment, a new energy power generation device 30 is optionally provided, which includes a hydrogen production device 31, a hydrogen storage device 32, and a fuel cell stack 33 connected in sequence; the hydrogen production equipment 31 is used for producing hydrogen, the hydrogen storage equipment 32 is used for storing hydrogen, and the fuel cell stack 33 is used for converting hydrogen into electric energy; the control device 10 is used to control the hydrogen production apparatus 31, the hydrogen storage apparatus 32, and the fuel cell stack 33.

Specifically, the new energy power generation device 30 can generate power by using clean hydrogen energy, and accordingly, the hydrogen production equipment 31 is used for producing hydrogen, for example, the hydrogen production equipment 31 may be a water electrolysis hydrogen production device, and the like, and the hydrogen produced by the hydrogen production equipment 31 may be input into the hydrogen storage equipment 32 for storage and utilization. The hydrogen storage device 32 may be a hydrogen storage tank, the hydrogen storage device 32 can deliver hydrogen to the fuel cell stack 33, the fuel cell stack 33 is a chemical device that directly converts chemical energy of fuel into electric energy, and the fuel cell stack 33 can convert hydrogen energy into electric energy to store, so as to supply power to the charging device 40, so that the charging device 40 can charge the vehicle. The control device 10 can control the processes of hydrogen production by the hydrogen production device 31, hydrogen storage by the hydrogen storage device 32, and power generation by the fuel cell stack 33 and power supply to the charging device 40.

Referring to fig. 2, optionally, the set power usage period comprises a first period; control apparatus 10 is configured to control grid 50 to power energy storage device 20, hydrogen-producing plant 31, and charging apparatus 40 during a first period of time.

For example, the electricity consumption period of the vehicle charging station may be divided into a first period of time, which is a valley period, and a second period of time, which is a non-valley period. The off-peak electricity period refers to a period of time other than the off-peak electricity period, such as an electricity peak period, in a day, and the electricity fee in the off-peak electricity period is lower than the electricity fee in the off-peak electricity period, that is, the electricity fee in the first period is lower than the electricity fee in the second period. Therefore, the electricity cost in the first time period is low, and in the first time period, the control device 10 can control the power grid 50 to supply power to the energy storage device 20 so that the energy storage device 20 can store electric energy, control the power grid 50 to supply power to the hydrogen production equipment 31 so that the hydrogen production equipment 31 can produce hydrogen so that the hydrogen storage equipment 32 can store hydrogen, and control the power grid 50 to supply power to the charging device 40 so that the charging device 40 can charge the vehicle. The advantage of this arrangement is that it can ensure that the vehicle charging station normally charges the vehicle, and also helps to fully charge the energy storage device 20 in the charging station and fully store the hydrogen storage device 32 with hydrogen so as to generate electricity through the fuel cell stack 33 when necessary, so that the energy storage device 20 and the fuel cell stack 33 can be used as a supplementary power supply mode of the vehicle charging station when necessary, and meanwhile, the electricity cost in the first time period is low, and excessive energy waste is not caused.

Referring to fig. 2, optionally, the set power usage period further includes a second period; and the control device 10 is used for controlling the power grid 50 to supply power to the charging device 40 and controlling the power grid to stop supplying power to the energy storage device and the hydrogen production equipment when the total charging power is less than or equal to the power of the distribution network in the second time interval.

Illustratively, the second time period is a non-valley electricity period, which refers to a time period other than the valley electricity period in a day, such as a peak electricity period, and the cost of electricity consumption is higher in the second time period compared to the first time period. The total charging power is less than or equal to the distribution network power, which means that when there are fewer vehicles to be charged in the vehicle charging station, the charging demand of the vehicle charging station is low. Due to the higher electricity cost of the second time period, the control device 10 can control the power grid 50 to stop supplying power to the energy storage device 20 and the hydrogen production equipment 31 during the second time period, so as to reduce the electricity cost of the charging station. Although the electricity cost in the second time interval is higher, when the total charging power is less than or equal to the distribution network power, the charging demand of the vehicle charging station is lower, and therefore, the control device 10 can control the power supply of the charging device 40 of the power grid 50, so that the charging device 40 can charge the vehicle, thereby ensuring the normal operation of the vehicle charging station and not generating too high electricity cost.

Referring to fig. 2, optionally, the set power usage period further includes a second period; the control device 10 is configured to control the power grid 50 and the energy storage device 20 to supply power to the charging device 40 or control the power grid 50 and the fuel cell stack 33 to supply power to the charging device 40 when the total charging power is greater than the distribution network power in the second time period.

Illustratively, the second time period is a non-valley electricity period, which refers to a time period other than the valley electricity period in a day, such as a peak electricity period, and the cost of electricity consumption is higher in the second time period compared to the first time period. The total charging power is greater than the power of the distribution network, which means that when there are more vehicles to be charged in the vehicle charging station, the charging demand of the vehicle charging station is high, and the total charging power of the plurality of vehicles exceeds the power of the distribution network. Therefore, in the second period, in order to prevent the actual total charging power in the vehicle charging station from being larger than the distribution network power, the charging device 40 is derated to increase the charging time, and the vehicle charging station is prevented from causing impact on the power grid during the peak period, when it is detected by the control device 10 that the total charging power of the vehicle to be charged is greater than the distribution network power, power grid 50 and energy storage device 20 are controlled to power charging device 40, such as power grid 50 being controlled to power a portion of charging device 40 in a vehicle charging station, while controlling the energy storage device 20 to supply another part of the charging devices 40 in the vehicle charging station, alternatively, the power grid 50 and the fuel cell stack 33 may be controlled to supply power to the charging device 40, for example, the power grid 50 may be controlled to supply power to a part of the charging device 40 in a vehicle charging station, while controlling the fuel cell stack 33 to supply power to another part of the charging means 40 in the vehicle charging station. The fuel cell stack 33 is controlled to supply power to the charging device 40, and specifically, the hydrogen storage device 32 is controlled to deliver hydrogen to the fuel cell stack 33, so that the fuel cell stack 33 converts hydrogen energy into electric energy to supply power to the charging device 40. The advantage of setting up like this can satisfy the demand of charging of power consumption peak hour vehicle, can reduce the power demand that the electric wire netting surveyed again. Meanwhile, since the energy storage device 20 has been fully charged for the first period of time and the hydrogen storage apparatus 32 has been fully charged for the first period of time, the power consumption cost of the vehicle charging station is not increased by supplying power to part of the charging device 40 using the energy storage device 20 or the hydrogen storage apparatus 32.

With continued reference to fig. 2, on the basis of the above embodiment, optionally, during the second period and when the total charging power is greater than the distribution network power, the control device 10 may control the grid 50 and the energy storage device 20 to supply power to the charging device 40, and when the energy storage device 20 is exhausted or the energy storage device 20 fails, the control device 10 may control the grid 50 and the fuel cell stack 33 to supply power to the charging device 40.

For example, in the off-peak period (i.e., the second period), and when there are many charging vehicles (i.e., the total charging power is greater than the distribution network power), since the energy storage battery in the energy storage device 20 stores electric energy for a long time without being used, which may adversely affect the storage capacity of the energy storage battery, it is possible to preferentially use the energy storage device 20 to supply power to one part of the charging devices 40, and use the power grid to supply power to another part of the charging devices 40. When the energy storage device 20 runs out of power or the energy storage device 20 fails, the control device 10 controls one part of the charging devices 40 of the fuel cell battery 33 to supply power and uses the power grid to supply power for another part of the charging devices 40. This arrangement has the advantage of ensuring that the vehicle charging station can normally charge the vehicle, and is also beneficial to ensuring the storage capacity of the energy storage device 20.

Fig. 3 is a schematic block diagram of another vehicle charging station according to an embodiment of the present invention, as shown in fig. 3, optionally, in some embodiments of the present invention, the new energy power generation device may include a photovoltaic power generation assembly 60, and the electricity utilization period further includes a second period; the control device 10 is used for controlling the photovoltaic power generation assembly 60 to supply power to the charging device 40 when the total charging power is less than or equal to the power generation power of the photovoltaic power generation assembly 60 in the second time period.

Specifically, the photovoltaic power generation module 60 can generate power by using solar energy. The second time period is a non-valley electricity period, which refers to a time period other than a valley electricity period in a day, such as a peak electricity period. The total charging power is less than or equal to the generating power of the photovoltaic power generation assembly 60, which means that the current generating power of the photovoltaic power generation assembly 60 can meet the total charging power requirement of the vehicle to be charged in the vehicle charging station. Therefore, when the total charging power is less than or equal to the power generation power of the photovoltaic power generation assembly 60 in the second time period, the control device 10 can control the photovoltaic power generation assembly 60 to supply power to the charging device 40, and the new energy power generation mode is used as the main power supply means of the vehicle charging station, so that the power requirement of the vehicle charging station on the power grid side can be relieved, the power consumption cost of the charging station can be reduced, and the charging station can be ensured to charge the vehicle normally.

Referring to fig. 3, on the basis of the above embodiment, optionally, the new energy power generation device further includes a hydrogen production device 31, a hydrogen storage device 32, and a fuel cell stack 33, which are connected in sequence; the hydrogen production equipment 31 is used for producing hydrogen, the hydrogen storage equipment 32 is used for storing hydrogen, and the fuel cell stack 33 is used for converting hydrogen into electric energy; the control device 10 is used for controlling the hydrogen production equipment 31, the hydrogen storage equipment 32 and the fuel cell stack 33; the control device 10 is further configured to control the photovoltaic power generation assembly 60 and the energy storage device 20 to supply power to the charging device 40, or control the photovoltaic power generation assembly 60 and the fuel cell stack 33 to supply power to the charging device 40, when the total charging power is greater than the generated power of the photovoltaic power generation assembly 60 in the second time period.

Specifically, the total charging power is greater than the generated power of the photovoltaic power generation assembly 60, which means that the current generated power of the photovoltaic power generation assembly 60 cannot meet the total charging power requirement of the vehicle to be charged in the vehicle charging station. Therefore, the control device 10 can control the energy storage device 20 or the fuel cell stack 33 to supply power as a supplementary power supply for the photovoltaic power generation assembly 60, for example, control the photovoltaic power generation assembly 60 to supply power to one part of the charging devices 40 in the vehicle charging station and simultaneously control the energy storage device 20 to supply power to another part of the charging devices 40 in the vehicle charging station, or control the photovoltaic power generation assembly 60 to supply power to one part of the charging devices 40 in the vehicle charging station and simultaneously control the fuel cell stack 33 to supply power to another part of the charging devices 40 in the vehicle charging station. The advantage that sets up like this lies in, can satisfy the demand of charging of power consumption peak period vehicle, can reduce the power demand that the electric wire netting was surveyed again, still can not increase vehicle charging station's power consumption cost simultaneously.

The embodiment of the invention further provides a control method of the vehicle charging station, and fig. 4 is a schematic flow chart of the control method of the vehicle charging station provided by the embodiment of the invention, the method can be executed by the vehicle charging station provided by any embodiment of the invention, and the embodiment is suitable for the situation of charging the new energy vehicle. As shown in fig. 1, the vehicle charging station includes: the control device 10, the energy storage device 20, the new energy power generation device 30 and the charging device 40; the control device 10 is electrically connected with the power grid 50, the energy storage device 20, the new energy power generation device 30 and the charging device 40, and both the energy storage device 20 and the new energy power generation device 30 are electrically connected with the charging device 40; accordingly, as shown in fig. 4, the control method of the vehicle charging station includes:

and S110, controlling at least one of the power grid, the energy storage device and the new energy power generation device to supply power to the charging device through the control device according to the relation between the total charging power of the vehicle in the vehicle charging station and the distribution network power of the power grid and the power utilization time period, so that the charging device charges the vehicle.

For example, the total charging power of the vehicles in the vehicle charging station refers to the total charging power of the plurality of vehicles currently required to be charged at the vehicle charging station, that is, the total power load of the plurality of charging loads currently on the vehicle charging station. The distribution network power of the power grid 50 refers to the total power supplied by the power system to the power network to which the vehicle charging station belongs. The electricity utilization time period is an electricity utilization time period of the vehicle charging station, for example, the electricity utilization time period may be divided into a valley electricity time period and a non-valley electricity time period, where the valley electricity time period may mean a time period in which electricity is charged by using a valley electricity price, and the non-valley electricity time period means a time period in a day except the valley electricity time period, of course, the division manner of the electricity utilization time period is not limited thereto, for example, the electricity utilization time period may also be divided into a night time period and a day time period, which is not limited in this embodiment. The control device 10 may control at least one of the power grid 50, the energy storage device 20 and the new energy power generation device 30 to supply power to the charging device 40 according to a relationship between a total charging power of the vehicle in the vehicle charging station and a distribution network power of the power grid 50 and a power consumption period, and for example, different charging modes of the vehicle charging station will be described below by dividing the power consumption period into a valley power period and a non-valley power period:

On the basis of the above-described embodiments, the present embodiment optimizes the control method of the vehicle charging station. Referring to fig. 2, alternatively, the new energy power generation apparatus 30 includes a hydrogen production device 31, a hydrogen storage device 32, and a fuel cell stack 33 connected in this order; the hydrogen production equipment 31 is used for producing hydrogen, the hydrogen storage equipment 32 is used for storing hydrogen, and the fuel cell stack 33 is used for converting hydrogen into electric energy; the control device 10 is used for controlling the hydrogen production equipment 31, the hydrogen storage equipment 32 and the fuel cell stack 33; the electricity consumption period comprises a first period; accordingly, a control method of a vehicle charging station includes:

and the control device controls the power grid to supply power to the energy storage device, the hydrogen production equipment and the charging device in a first period.

Optionally, the electricity usage period further comprises a second period; the control method of the vehicle charging station further includes: and when the total charging power is less than or equal to the power of the distribution network in the second time period through the control device, controlling the power grid to supply power to the charging device and controlling the power grid to stop supplying power to the energy storage device and the hydrogen production equipment.

Referring to fig. 2, the second time period is an off-peak electricity time period, which is a time period other than the off-peak electricity time period in a day, for example, an electricity peak time period, and the electricity cost of the second time period is higher than that of the first time period. The total charging power is less than or equal to the distribution network power, which means that when there are fewer vehicles to be charged in the vehicle charging station, the charging demand of the vehicle charging station is low. Due to the higher electricity cost of the second time period, the control device 10 can control the power grid 50 to stop supplying power to the energy storage device 20 and the hydrogen production equipment 31 during the second time period, so as to reduce the electricity cost of the charging station. Although the electricity cost in the second time interval is higher, when the total charging power is less than or equal to the distribution network power, the charging demand of the vehicle charging station is lower, and therefore, the control device 10 can control the power supply of the charging device 40 of the power grid 50, so that the charging device 40 can charge the vehicle, thereby ensuring the normal operation of the vehicle charging station and not generating too high electricity cost.

Optionally, the electricity usage period further comprises a second period; the control method of the vehicle charging station further includes: and when the total charging power is greater than the power of the distribution network in the second time period through the control device, controlling the power grid and the energy storage device to supply power to the charging device, or controlling the power grid and the fuel battery pack to supply power to the charging device.

Referring to fig. 2, the second time period is an off-peak electricity time period, which is a time period other than the off-peak electricity time period in a day, for example, an electricity peak time period, and the electricity cost of the second time period is higher than that of the first time period. The total charging power is greater than the power of the distribution network, which means that when there are more vehicles to be charged in the vehicle charging station, the charging demand of the vehicle charging station is high, and the total charging power of the plurality of vehicles exceeds the power of the distribution network. Therefore, in the second period, in order to prevent the actual total charging power in the vehicle charging station from being larger than the distribution network power, the charging device 40 is derated to increase the charging time, and the vehicle charging station is prevented from causing impact on the power grid during the peak period, when it is detected by the control device 10 that the total charging power of the vehicle to be charged is greater than the distribution network power, power grid 50 and energy storage device 20 are controlled to power charging device 40, such as power grid 50 being controlled to power a portion of charging device 40 in a vehicle charging station, while controlling the energy storage device 20 to supply another part of the charging devices 40 in the vehicle charging station, alternatively, the power grid 50 and the fuel cell stack 33 may be controlled to supply power to the charging device 40, for example, the power grid 50 may be controlled to supply power to a part of the charging device 40 in a vehicle charging station, while controlling the fuel cell stack 33 to supply power to another part of the charging means 40 in the vehicle charging station. The fuel cell stack 33 is controlled to supply power to the charging device 40, and specifically, the hydrogen storage device 32 is controlled to deliver hydrogen to the fuel cell stack 33, so that the fuel cell stack 33 converts hydrogen energy into electric energy to supply power to the charging device 40. The advantage of setting up like this can satisfy the demand of charging of power consumption peak hour vehicle, can reduce the power demand that the electric wire netting surveyed again. Meanwhile, since the energy storage device 20 has been fully charged for the first period of time and the hydrogen storage apparatus 32 has been fully charged for the first period of time, the power consumption cost of the vehicle charging station is not increased by supplying power to part of the charging device 40 using the energy storage device 20 or the hydrogen storage apparatus 32.

Optionally, in the second time period, when the total charging power is greater than the power of the distribution network, the control device controls the power grid and the energy storage device to supply power to the charging device, and when the electric energy of the energy storage device is exhausted or the energy storage device fails, the control device controls the power grid and the fuel cell set to supply power to the charging device.

With continued reference to fig. 2, for example, during off-peak electricity periods (i.e., the second period), and when there are more charging vehicles (i.e., the total charging power is greater than the distribution network power), since the energy storage battery in the energy storage device 20 stores electric energy for a long time without being used, which may adversely affect the storage capacity of the energy storage battery, the energy storage device 20 may be preferentially used to supply power to one part of the charging devices 40, and the power grid may be used to supply power to another part of the charging devices 40. When the energy storage device 20 runs out of power or the energy storage device 20 fails, the control device 10 controls one part of the charging devices 40 of the fuel cell battery 33 to supply power and uses the power grid to supply power for another part of the charging devices 40. This arrangement has the advantage of ensuring that the vehicle charging station can normally charge the vehicle, and is also beneficial to ensuring the storage capacity of the energy storage device 20.

Optionally, the new energy power generation device comprises a photovoltaic power generation assembly, and the electricity utilization time period further comprises a second time period; accordingly, the control method of the vehicle charging station further includes: and when the total charging power is less than or equal to the generating power of the photovoltaic power generation assembly in the second time period through the control device, controlling the photovoltaic power generation assembly to supply power to the charging device.

Referring to fig. 3, in particular, the photovoltaic power generation assembly 60 can generate power using solar energy. The second time period is a non-valley electricity period, which refers to a time period other than a valley electricity period in a day, such as a peak electricity period. The total charging power is less than or equal to the generating power of the photovoltaic power generation assembly 60, which means that the current generating power of the photovoltaic power generation assembly 60 can meet the total charging power requirement of the vehicle to be charged in the vehicle charging station. Therefore, when the total charging power is less than or equal to the power generation power of the photovoltaic power generation assembly 60 in the second time period, the control device 10 can control the photovoltaic power generation assembly 60 to supply power to the charging device 40, and the new energy power generation mode is used as the main power supply means of the vehicle charging station, so that the power requirement of the vehicle charging station on the power grid side can be relieved, the power consumption cost of the charging station can be reduced, and the charging station can be ensured to charge the vehicle normally.

On the basis of the above embodiment, optionally, the new energy power generation device further includes a hydrogen production device, a hydrogen storage device, and a fuel cell stack, which are connected in sequence; the hydrogen production equipment is used for producing hydrogen, the hydrogen storage equipment is used for storing the hydrogen, and the fuel cell pack is used for converting the hydrogen into electric energy; the control device is used for controlling the hydrogen production equipment, the hydrogen storage equipment and the fuel cell pack; accordingly, the control method of the vehicle charging station further includes:

and when the total charging power is greater than the generating power of the photovoltaic power generation assembly in the second time period, the control device controls the photovoltaic power generation assembly and the energy storage device to supply power to the charging device, or controls the photovoltaic power generation assembly and the fuel cell pack to supply power to the charging device.

With reference to fig. 3, specifically, the total charging power is greater than the generated power of the photovoltaic power generation assembly 60, which means that the current generated power of the photovoltaic power generation assembly 60 cannot meet the total charging power requirement of the vehicle to be charged in the vehicle charging station. Therefore, the control device 10 can control the energy storage device 20 or the fuel cell stack 33 to supply power as a supplementary power supply for the photovoltaic power generation assembly 60, for example, control the photovoltaic power generation assembly 60 to supply power to one part of the charging devices 40 in the vehicle charging station and simultaneously control the energy storage device 20 to supply power to another part of the charging devices 40 in the vehicle charging station, or control the photovoltaic power generation assembly 60 to supply power to one part of the charging devices 40 in the vehicle charging station and simultaneously control the fuel cell stack 33 to supply power to another part of the charging devices 40 in the vehicle charging station. The advantage that sets up like this lies in, can satisfy the demand of charging of power consumption peak period vehicle, can reduce the power demand that the electric wire netting was surveyed again, still can not increase vehicle charging station's power consumption cost simultaneously.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

In this embodiment, the control method of the vehicle charging station is further optimized, and fig. 5 is a schematic flow chart of another control method of the vehicle charging station according to the embodiment of the present invention, as shown in fig. 5, the method may specifically include:

and S202, detecting whether the current time interval is the valley electricity time interval or not through the control device.

If the current time interval is the valley electricity time interval, executing S204; if the current time interval is the off-valley period, S206 is performed.

And S204, controlling the power grid to supply power to the hydrogen production equipment through the control device so as to enable the hydrogen production equipment to produce hydrogen, controlling the power grid to supply power to the energy storage device so as to enable the energy storage device to be charged, and controlling the power grid to supply power to the charging device so as to enable the charging device to charge the vehicle.

And S206, controlling the power grid to stop supplying power to the hydrogen production equipment and the energy storage device through the control device, and controlling the power grid to continuously supply power to the charging device.

And S208, judging whether the total charging power of the vehicle charging station is larger than the power of the distribution network through the control device.

If the total charging power of the vehicle charging station is greater than the power of the distribution network, executing S210; if the total charging power of the vehicle charging station is less than or equal to the distribution network power, S218 is executed.

And S210, controlling the energy storage device to supply power to the charging device exceeding the distribution network power part through the control device.

And S212, judging whether the energy storage device is exhausted or fails through the control device.

If the electric quantity of the energy storage device is exhausted or fails, executing S214; if the energy storage device is not exhausted or failed, the process returns to S212.

S214, judging whether the total charging power of the vehicle charging station is larger than the power of the distribution network through the control device.

If the total charging power of the vehicle charging station is greater than the distribution network power, executing S216; if the total charging power of the vehicle charging station is less than or equal to the distribution network power, S218 is executed.

And S216, controlling the hydrogen storage device to supply hydrogen to the fuel cell stack through the control device so as to supply power to the charging device exceeding the power part of the distribution network through the fuel cell stack.

And S218, controlling the power grid to supply power to the charging device through the control device.

According to the technical scheme of the embodiment of the invention, at least one of the power grid, the energy storage device and the new energy power generation device is selected to supply power to the charging device according to the relation between the total charging power of the vehicle and the distribution network power of the power grid and the power utilization time period, and the power utilization capacity expansion of the vehicle charging station is not needed, so that multiple selectable power supply modes can be provided for the charging device of the vehicle according to the charging power requirement and the charging time period of the charging station, the charging requirement of the vehicle is met, the problem that the charging station cannot normally run and the charging requirement of the vehicle is difficultly met when the charging station is in the charging peak period or the power supply system fails in the prior art is solved, the power utilization cost of the charging station is favorably reduced, and the impact of the charging station on the power grid in the power utilization peak period is.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A vehicle charging station, comprising: the system comprises a control device, an energy storage device, a new energy power generation device and a charging device;

2. The vehicle charging station according to claim 1, wherein the new energy power generation apparatus includes a hydrogen production device, a hydrogen storage device, and a fuel cell stack, which are connected in this order; the hydrogen production equipment is used for producing hydrogen, the hydrogen storage equipment is used for storing hydrogen, and the fuel cell stack is used for converting the hydrogen into electric energy; the control device is used for controlling the hydrogen production equipment, the hydrogen storage equipment and the fuel cell set.

3. The vehicle charging station of claim 2, wherein the period of power usage comprises a first period of time; the control device is used for controlling the power grid to supply power to the energy storage device, the hydrogen production equipment and the charging device in the first period.

4. A vehicle charging station in accordance with claim 3, wherein said period of power usage further comprises a second period of time; and the control device is used for controlling the power grid and the energy storage device to supply power to the charging device or controlling the power grid and the fuel cell pack to supply power to the charging device when the total charging power is greater than the distribution network power in the second time interval.

5. A vehicle charging station in accordance with claim 3, wherein said period of power usage further comprises a second period of time; and the control device is used for controlling the power grid to supply power to the charging device and controlling the power grid to stop supplying power to the energy storage device and the hydrogen production equipment when the total charging power is less than or equal to the distribution network power in the second time interval.

6. The vehicle charging station of claim 1, wherein the new energy generation device comprises a photovoltaic power generation assembly, the electricity usage period further comprising a second period; and the control device is used for controlling the photovoltaic power generation assembly to supply power to the charging device when the total charging power is less than or equal to the power generation power of the photovoltaic power generation assembly in the second time period.

7. The vehicle charging station of claim 6, wherein the new energy power generation apparatus further comprises a hydrogen production device, a hydrogen storage device, and a fuel cell stack connected in sequence; the hydrogen production equipment is used for producing hydrogen, the hydrogen storage equipment is used for storing hydrogen, and the fuel cell stack is used for converting the hydrogen into electric energy; the control device is used for controlling the hydrogen production equipment, the hydrogen storage equipment and the fuel cell stack;

8. A vehicle charging station according to any of claims 1 to 7, wherein the electricity usage periods comprise a first period of time which is a valley period of electricity and a second period of time which is a non-valley period of electricity.

9. A control method of a vehicle charging station, characterized in that the vehicle charging station includes: the system comprises a control device, an energy storage device, a new energy power generation device and a charging device; the control device is electrically connected with a power grid, the energy storage device, the new energy power generation device and the charging device, and the energy storage device and the new energy power generation device are both electrically connected with the charging device;

the control method of the vehicle charging station includes:

10. The method according to claim 9, wherein the new energy power generation device comprises a hydrogen production apparatus, a hydrogen storage apparatus, and a fuel cell stack connected in this order; the hydrogen production equipment is used for producing hydrogen, the hydrogen storage equipment is used for storing hydrogen, and the fuel cell stack is used for converting the hydrogen into electric energy; the control device is used for controlling the hydrogen production equipment, the hydrogen storage equipment and the fuel cell stack; the electricity usage period comprises a first period;

the control method of the vehicle charging station includes:

11. The method of claim 10, wherein the electricity usage period further comprises a second period;

the control method of the vehicle charging station further includes:

12. The method of claim 11, wherein during the second time period and the total charging power is greater than the distribution network power, the grid and the energy storage device are controlled by the control device to supply power to the charging device, and when the energy storage device is depleted or fails, the grid and the fuel cell stack are controlled by the control device to supply power to the charging device.

13. The method of claim 10, wherein the electricity usage period further comprises a second period;

the control method of the vehicle charging station further includes:

14. The method of claim 9, wherein the new energy generation device comprises a photovoltaic power generation assembly, and the electricity usage period further comprises a second period;

the control method of the vehicle charging station further includes:

15. The method according to claim 14, wherein the new energy power generation apparatus further comprises a hydrogen production device, a hydrogen storage device, and a fuel cell stack connected in this order; the hydrogen production equipment is used for producing hydrogen, the hydrogen storage equipment is used for storing hydrogen, and the fuel cell stack is used for converting the hydrogen into electric energy; the control device is used for controlling the hydrogen production equipment, the hydrogen storage equipment and the fuel cell stack;

the control method of the vehicle charging station further includes:

16. The method of any one of claims 9-15, wherein the power usage period comprises a first period of time that is a valley period of power and a second period of time that is a non-valley period of power.