Power output control method and related device

Abstract

The invention provides a power output control method and a related device, and relates to the field of charging and discharging. In the application, under the condition that the power module operates, the output power of the power module is obtained, if the output power is smaller than the rated output power of the power module, it is indicated that the current utilization rate of the power module is relatively low, and the power module is controlled to output according to the rated output power. At the moment, multi-output electric energy can be stored in energy storage equipment, thereby improving the utilization rate of the power module and prolonging the service life of the power module.

Description

Technical Field

[0001] The present application relates to the field of charging and discharging, and more specifically, to a power output control method and related devices. Background Art

[0002] There are multiple charging piles in the charging station, and multiple power modules are configured in the charging piles. The power output capacity of each power module fluctuates in real time according to the needs of the vehicle's BMS (Battery Management System), so that the power module does not output according to the rated output power, resulting in low power module utilization and affecting the service life of the power module. Summary of the invention

[0003] In view of this, the present application provides a power output control method and related devices to solve the problem that the power module does not output according to the rated output power and the power module utilization rate is low.

[0004] In order to solve the above technical problems, this application adopts the following technical solutions:

[0005] In a first aspect, the present application discloses a power output control method, comprising:

[0006] When the power module is running, obtaining the output power of the power module;

[0007] If the output power is less than the rated output power of the power module, the power module is controlled to output according to the rated output power, so as to store the multi-output electric energy into the energy storage device.

[0008] Optionally, if the output power is less than the rated output power of the power module, controlling the power module to output according to the rated output power includes:

[0009] Get the current period;

[0010] When the output power is less than the rated output power of the power module and the current period belongs to a valley power period, the power module is controlled to output according to the rated output power.

[0011] Optionally, if the output power is less than the rated output power of the power module, controlling the power module to output according to the rated output power includes:

[0012] If the output power is less than the rated output power of the power module and the power output rate of the power module is less than an output rate threshold, the power module is controlled to output according to the rated output power.

[0013] Optionally, it also includes:

[0014] The energy storage device is used to charge the load.

[0015] Optionally, using the energy storage device to charge a load includes:

[0016] If the total charging power of the charging station is greater than the power threshold, the energy storage device is controlled to charge the load connected to the first target charging pile, wherein the first target charging pile is a charging pile that is not equipped with a power module.

[0017] Optionally, controlling the energy storage device to charge a load connected to the first target charging pile includes:

[0018] When the current time is a peak power period, if there is a load to be charged, output charging pile recommendation information to the load;

[0019] If the charging pile selected by the load is the first target charging pile, the energy storage device is controlled to provide electric energy to the first target charging pile to charge the load connected to the first target charging pile.

[0020] Optionally, using the energy storage device to charge a load includes:

[0021] When the output power of the second target charging pile cannot meet the power demand of the load, the load is charged together by utilizing the electric energy in the energy storage device and the power module inside the second target charging pile; the second target charging pile is a charging pile equipped with a power module inside.

[0022] In a second aspect, the present application discloses a power output control device, comprising:

[0023] A power acquisition module, used to acquire the output power of the power module when the power module is running;

[0024] The power control module is used to control the power module to output according to the rated output power if the output power is less than the rated output power of the power module, so as to store the multi-output electric energy into the energy storage device.

[0025] In a third aspect, the present application discloses a controller for executing the above-mentioned power output control method.

[0026] In a fourth aspect, the present application discloses a power output control system, including the above-mentioned controller and energy storage device.

[0027] Optionally, the input end of the energy storage device is connected to the power output line of the power module, and the output end of the energy storage device is connected to the DC input side of the charging pile.

[0028] The present application provides a power output control method and related devices. In the present application, when a power module is running, the output power of the power module is obtained. If the output power is less than the rated output power of the power module, it means that the current utilization rate of the power module is low. Then the power module is controlled to output according to the rated output power. At this time, the excess output electric energy can be stored in an energy storage device, thereby improving the utilization rate of the power module and increasing the service life of the power module. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of power changes during a charging process provided in an embodiment of the present application;

[0031] Figure 2 A schematic diagram of power utilization during a charging process provided in an embodiment of the present application;

[0032] Figure 3 A schematic diagram of a charging pile provided in an embodiment of the present application;

[0033] Figure 4 A communication network topology diagram provided in an embodiment of the present application;

[0034] Figure 5 Another communication network topology diagram provided in an embodiment of the present application;

[0035] Figure 6 A flow chart of a power output control method provided in an embodiment of the present application;

[0036] Figure 7 A schematic diagram of a device connection provided in an embodiment of the present application;

[0037] Figure 8 A schematic diagram of vehicle charging provided in an embodiment of the present application;

[0038] Fig. 9 A schematic diagram of the structure of a power output control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] At present, charging stations are equipped with multiple charging piles, and each charging pile is equipped with multiple power modules. The power output capacity of each power module fluctuates in real time according to the needs of the vehicle's BMS system. Figure 1 As shown in the figure, during the vehicle charging process, the charging power demand of the vehicle is roughly divided into three stages, namely, the charging power rising stage, the charging power stable output stage, and the charging power falling stage. In the charging power rising stage, due to the low power demand of the vehicle, some power will not be used at this time. After the charging power rising stage, there is the charging power stable output stage. The power provided in this stage can be determined according to the power required by the vehicle. It may be full power (rated output power) output or not full power output. If it is not full power output, there is also unused power at this time. In the charging power falling stage, the charging power of the vehicle will decrease as the battery SOC (State Of Charge) increases, and some power will not be used at this time. It can be seen from this that during the entire charging process of the vehicle, the power module of the charging pile may not output according to the rated output power, so that the output capacity is not released to the maximum extent, the utilization rate of the power module is low, and thus the income of the occupant of the charging pile is affected.

[0041] like Figure 2 As shown, Figure 2 The power output of the power module of the charging pile during the entire charging process. The used power is the power required by the vehicle BMS, and the unused power is the power that is not fully released by the power module. Since this part of power is not used, the utilization rate of the power module is low. In addition, if the rated output power is not output each time the discharge is performed, the power module will be damaged and the service life of the power module will be affected.

[0042] To this end, in an embodiment of the present application, during the process of the power module outputting power, the power module can be controlled to output according to the rated output power, and the power not used by the vehicle can be stored in an energy storage device, thereby improving the utilization rate of the power module and also increasing the service life of the power module.

[0043] Based on the above content, an embodiment of the present application provides a power output control method, the execution subject may be a controller, and the controller may specifically be a local scheduling middle station in the charging station, which may control all charging piles and energy storage devices in the charging station.

[0044] In actual scenarios, in order to improve the convenience and reliability of charging, charging stations are equipped with charging piles and energy storage devices. Among them, charging piles can be divided into first-type charging piles and second-type charging piles. The first-type charging pile is equipped with a power module that provides electrical energy, while the second-type charging pile is not equipped with a power module that provides electrical energy. When the vehicle needs to be charged, it can drive to the location of the charging pile and use the charging gun of the charging pile to perform the charging operation.

[0045] Specifically, during the rising, stabilizing or decreasing stage of the charging power during the vehicle charging process, in order to use the idle power modules in the charging pile to charge other vehicles, so as to improve the utilization rate of the output power of the entire station. In the embodiment of the present application, some normal charging piles have been installed in the charging station, that is, on the basis of the first type of charging piles with power modules, some charging extension piles without power modules are installed, which are called second type charging piles in this embodiment. Since the second type of charging pile is not installed with a power module, the volume of the second type of charging pile can be very small and occupies less space.

[0046] In one application scenario, when the charging piles at a charging station are not charging at peak power, charging extension piles can be used to expand the charging piles. On the one hand, this can reduce the purchase cost of the charging piles. On the other hand, more piles can be used to charge more cars, which can maximize the power of the charging piles and ultimately bring higher profits to customers.

[0047] The second type of charging pile has the same structure as the first type of charging pile except that the power module is not installed. Figure 3 As shown, the left side is the first type of charging pile, and the right side is the second type of charging pile, that is, the charging extension pile. The piles are connected by a power output cable to ensure that the first type of charging pile on the left can transfer power to the second type of charging pile on the right. All charging piles are connected in series, that is, the first type of charging pile and the second type of charging pile are connected in series. Taking the existence of three first type charging piles and two second type charging piles as an example, the three first type charging piles are 1# first type charging pile, 2# first type charging pile and 3# second type charging pile, and the two second type charging piles are 1# second type charging pile and 2# second type charging pile. The series connection in this embodiment refers to 1# first type charging pile, 2# second type charging pile, and 3# second type charging pile connected in series with 1# second type charging pile, and 1# first type charging pile, 2# first type charging pile, and 3# first type charging pile connected in series with 2# second type charging pile, that is, to ensure that each first type charging pile and each second type charging pile are connected with a power output line, to ensure that each first type charging pile can output power to the second type charging pile.

[0048] Since the second type of charging pile uses the idle power modules in the first type of charging pile to charge the vehicle, and the first type of charging pile is affected by its own charging of the vehicle, it will constantly adjust the number and power of the power modules used internally, so the power information of the second type of charging pile will change. For example, the load of the first type of charging pile (such as a vehicle) may reduce or increase the power, then the power module called internally by the first type of charging pile will change, affecting the number and power of the power modules used by the second type of charging pile, causing the power information of the second type of charging pile to change.

[0049] Inside the charging station, all charging piles communicate through the local area network, such as Figure 3 As shown, the solid line is the communication line. When the second type charging pile charges the vehicle, the first type charging pile and the second type charging pile exchange charging information through the communication line.

[0050] When the first type of charging pile and the second type of charging pile are installed, all charging piles establish a local area network. In the local area network, the first type of charging pile and the second type of charging pile are connected through a switch to ensure that the TCU (Telematics Control Unit) in all charging piles can communicate through the switch. The switch can also be connected to a router, which is connected to an external router to ensure that all charging piles can communicate with the local scheduling center through the router. Figure 4 The communication network topology shown.

[0051] Figure 4 In the embodiment, for the first type of charging pile, at least one power module is configured inside, such as 1# power module, 2# power module...n# power module, where n is a positive integer. In actual scenarios, some power modules inside the same first type of charging pile may be outputting power, while some power modules may be in an idle state. It should be noted that the types of power modules inside different first type charging piles may be the same, such as all 30KW power modules or all 60KW power modules. In addition, the types of power modules inside different first type charging piles may also be different, such as some first type charging piles have 30KW power modules, and some first type charging piles have 60KW power modules. The specific configuration can be based on the actual scenario. If it is for the convenience of management and maintenance, the same type of power modules can be used.

[0052] For the second type of charging pile, the charging pile is only equipped with a TCU but no power module.

[0053] In addition, if Figure 4 As shown, the display interface of the charging pile will also display the working status, such as: idle or charging.

[0054] Before the charging pile is officially used, it is necessary to register the charging pile. At this time, the first type of charging pile and the second type of charging pile can send registration information to the local scheduling middle station. Among them, the registration information may include pile module information, such as the power and quantity of the power module. In addition, the registration information also includes the unique identification of the charging pile, such as SN (Serial Number, serial number) number, location and other information. After receiving the registration information, the local scheduling middle station performs registration operations on the first type of charging pile and the second type of charging pile based on the registration information. During the specific registration, the registration information of the charging pile can be recorded in the database, and the registered charging pile can be controlled by the local scheduling middle station. When charging the vehicle, the subsequent charging pile will also upload the charging information (such as TCU operation information, power module power, operating status, etc.) to the local scheduling middle station, which is responsible for allocating the charging power of the charging piles of the entire station.

[0055] Based on the above-mentioned first type charging pile and second type charging pile embodiments, in another embodiment of the present application, on the basis of configuring the charging pile in the charging station, an energy storage device is further configured. The energy storage device can be composed of a BMS and a battery cluster, etc., and can be specifically configured according to actual conditions. At this time, the entire system includes a local scheduling middle station, an energy storage device and a charging pile group. The charging pile group includes the first type charging pile and the second type charging pile in the charging station. The connection structure between the energy storage device, the charging pile and the local scheduling middle station is shown in FIG. Figure 5 As shown. Each power module of all first-type charging piles in the charging station will be connected to the energy storage device through a power output line, and the output end of the energy storage device can be connected to the DC input side of the first-type charging pile and the second-type charging pile. Upon receiving an instruction, the energy storage device can provide electrical energy to the first-type charging pile and the second-type charging pile to charge the load. For example, when the energy storage device is connected to the second-type charging pile, the energy storage device is connected to the virtual power module in the second-type charging pile, and the virtual power module is used to aggregate the power output by multiple power modules and the energy storage device, and charge loads such as vehicles.

[0056] The energy storage device and all charging piles can communicate with each other in the same local network, and each charging pile, energy storage device and local scheduling center can communicate accordingly through communication lines.

[0057] On the basis of the above connection structure, by connecting an energy storage device to the charging station, the unused electric energy of the power module of the charging pile is stored in the energy storage device, so that the power module can release power to the maximum extent, thereby greatly improving the utilization rate of the power module.

[0058] Based on the above connection structure, refer to Figure 6 , a power output control method may include:

[0059] S11. When the power module is running, obtain the output power of the power module.

[0060] In this embodiment, when charging a vehicle, the charging pile will upload the charging information (such as TCU operation information, power of the power module, operating status, etc.) to the local scheduling middle station. The local scheduling middle station can understand the operating status of the power modules in the charging piles of the entire station.

[0061] When it is determined that a certain power module is operating, that is, the power module is outputting power, the output power of the power module can be analyzed to determine whether there is unused power at this time. The output power of the power module can be obtained from the charging information uploaded by the charging pile.

[0062] S12: If the output power is less than the rated output power of the power module, control the power module to output according to the rated output power, so as to store the multi-output electric energy into the energy storage device.

[0063] In this embodiment, the rated output power of the power module is known in advance, and the rated output power of the power module can be obtained. If the output power of the power module is equal to the rated output power of the power module, it means that the power module is fully output at this time, and the power module utilization rate is high. If the output power of the power module is less than the rated output power of the power module, it means that the power module is not fully output at this time, and the power utilization rate is low. In this case, the local scheduling center can be used as follows Figure 5 The communication line shown in the figure first sends an energy storage instruction to the energy storage device to prepare the energy storage device to receive electric energy, and then sends a high-power output instruction to the charging pile to control the running power module to output according to the rated output power. The power module will use the power output line between the power module and the energy storage device to output electric energy to the energy storage device. At this time, there are two ways to output the power of the power module, one is to output to the load, such as charging the vehicle, and the other is to store the electric energy not used by the load in the energy storage device.

[0064] For example, the rated output power of the power module is 40kw. When the power module is outputting power, the power output to the load is 24kw, that is, the power module only outputs 60% of the power. At this time, 40% of the power can still be output. The power module is controlled to output at the rated power of 40kw, 24kw of power is output to the load, and 16kw of power is stored in the energy storage device to charge the battery cluster of the energy storage device. In this way, the power module can be guaranteed to work at the rated output power and full power output.

[0065] It can be understood that the specific local scheduling middle station can first send an energy storage instruction to the energy storage device, and then send a high-power output instruction to the charging pile. The output power of the power module will increase from 60% to 100%, and the current of the power module will be stored in the energy storage device. In this cycle, the local scheduling middle station can send instructions to the energy storage device to store electricity according to the actual output of each power module in each charging pile, so that the power of a single power module can be fully output. The energy storage device will aggregate the power that has not been fully released by all power modules in the current charging station, and ultimately achieve the purpose of aggregating small power and outputting high power. The subsequent energy storage device can connect to the charging pile and output high power to the charging pile, so that the charging pile can charge the load, such as charging a vehicle.

[0066] In this embodiment, when the power module is running, the output power of the power module is obtained. If the output power is less than the rated output power of the power module, it means that the current utilization rate of the power module is low. In this case, the power module is controlled to output according to the rated output power. At this time, the excess output electric energy can be stored in the energy storage device, thereby improving the utilization rate of the power module and increasing the service life of the power module.

[0067] In addition, by setting up energy storage equipment and storing the unused electrical energy of the power module in the energy storage equipment, the power of the power module can be released to a greater extent, the service life of the power module can be extended, and the use of energy storage equipment for electricity storage can bring higher economic benefits to station operations.

[0068] The above embodiment needs to control the power module to output according to the rated output power so as to store the multi-output electric energy into the energy storage device. In actual scenarios, since the electricity prices are different in different time periods, the power output strategy of the power module can be optimized based on different electricity prices.

[0069] In one implementation, the current time period is obtained, and when the output power is less than the rated output power of the power module and the current time period belongs to a valley power period, the power module is controlled to output according to the rated output power.

[0070] In specific implementation, the electricity price is divided into peak electricity price and valley electricity price (also known as parity electricity price), and the peak electricity price is higher than the valley electricity price. Both the peak electricity price and the valley electricity price have corresponding time periods. The peak electricity price corresponds to the peak electricity time period, and the valley electricity price corresponds to the valley electricity time period. When the current time period is in the valley electricity time period, the valley electricity price is used for billing, and when the current time period is in the peak electricity time period, the peak electricity price is used for billing.

[0071] It can be understood that when the current time period is a valley power period, the electricity price generated by the power module output power is relatively low. Therefore, during this time period, the power module can be controlled to increase the output to the rated power output. If the current time period is a peak price period, it is not cost-effective to control the power module to output electric energy to the energy storage device to store electric energy. Therefore, in the embodiment of the present application, only when the output power is less than the rated output power of the power module and the current time period belongs to the valley power period, the local scheduling center will send an energy storage instruction to the energy storage device, and then send a high-power output instruction to the charging pile, that is, only when the electricity price is low, the output of the power module is allowed to be increased to the rated power output, thereby storing part of the electric energy in the energy storage device, so that the electric energy stored in the energy storage device is obtained at a lower cost (valley power tariff).

[0072] In the above embodiment, the time period is considered when performing power utilization. In another implementation of the present application, when performing power output of the power module, the power output rate of the power module may also be considered. Wherein, the power output rate = the output power of the power module / the rated output power of the power module, and the power output rate is stored in the form of a percentage, such as 50%, 70%, 90%, etc.

[0073] In one implementation, if the output power is less than the rated output power of the power module and the power output rate of the power module is less than an output rate threshold, the power module is controlled to output according to the rated output power.

[0074] Specifically, the power output rate reflects the power utilization of the power module. The higher the power output rate, the higher the power utilization of the power module, and the lower the power output rate, the lower the power utilization of the power module. When the power utilization of the power module is high, the power that is not output by the power module is small. Even if the unoutput power is not stored in the energy storage device, the life of the power module is also less affected. Therefore, in the embodiment of the present application, the unused electric energy will be stored in the energy storage device only when the power output rate utilization is low, such as less than the output rate threshold. Among them, the output rate threshold can be a fixed threshold or a variable threshold, such as 70%, 80%, etc., that is, only when the output power is less than the rated output power of the power module and the power output rate of the power module is less than the output rate threshold, the local scheduling middle station will first send an energy storage instruction to the energy storage device, and then send a high-power output instruction to the charging pile, that is, only when the power output rate is low, the unused electric energy of the power module is allowed to be stored in the energy storage device, reducing the impact of the inadequate output on the life of the power module. In addition, by setting the power output rate, the control frequency of the power module by the local scheduling center can be reduced, avoiding the problem of frequent adjustment of the output power of the power module and saving control resources.

[0075] In another implementation, when controlling the power output of the power module, the electricity price and the power output rate can also be considered simultaneously, that is, when the current period is a valley period, the power output rate of the power module is less than the output rate threshold and the output power is less than the rated output power of the power module, the power module is controlled to output according to the rated output power.

[0076] For example, if the local dispatching center detects that there is a power module whose output power is less than the rated output power of the power module, if it is a valley period and the power output rate (such as 70%) is less than the output rate threshold (such as 80%), the local dispatching center will first send an energy storage instruction to the energy storage device, and then send a high-power output instruction to the charging pile. At this time, the power module will transmit the 30% unoutput power to the energy storage device to charge the battery cluster of the energy storage device, thereby reducing costs and reducing the control frequency of the power module.

[0077] When the unused electric energy of the power module is stored in the energy storage device in the above-mentioned manner, the electric energy in the energy storage device gradually increases, so that when the electric energy of the energy storage device is needed, the energy storage device can be controlled to output electric energy. In one implementation, the energy storage device can be used to charge the load. Among them, both the first type of charging pile and the second type of charging pile can use the electric energy in the energy storage device to charge the load. When the first type of charging pile uses the electric energy in the energy storage device, the first type of charging pile can use the electric energy in the energy storage device and / or the power module inside itself to charge the load. When the second type of charging pile uses the electric energy in the energy storage device, the second type of charging pile can use the electric energy in the energy storage device and / or the idle power module inside the first type of charging pile to charge the load.

[0078] Specifically, when the second type charging pile uses the electric energy in the energy storage device and / or the idle power module inside the first type charging pile to charge the load, the connection between the second type charging pile and the first type charging pile and the energy storage device can be as follows: Figure 7 shown.

[0079] A switch is provided between the first type charging pile and the second type charging pile, and connectivity and non-connectivity of the first type charging pile and the second type charging pile are achieved by controlling the on and off of the switch.

[0080] like Figure 7 As shown, the first type of charging pile is internally provided with a main control and a power module, and the main control may be the above-mentioned TCU. The second type of charging pile is internally provided with a main control, and each main control may communicate through a switch.

[0081] A DC contactor is provided between the first type charging pile and the second type charging pile, and the DC contactor includes a plurality of single-pole single-throw switches, such as CB1, CB2 and CB3. The number of switches is the same as the number of power modules inside the first type charging pile, that is, the power output line of the power module inside the first type charging pile is connected to the power input line of the second type charging pile through the corresponding switch in the DC contactor.

[0082] The power input line inside the second type of charging pile is aggregated into a power output line through an internal virtual power module. The power output line is connected to the gun line through a contactor. The gun line can be connected to the charging gun, and the charging gun can be inserted into the vehicle's charging port to charge the vehicle.

[0083] The power output line of the power module of the first type charging pile is connected to one end of the energy storage device, and the other end of the energy storage device is connected to the virtual power module in the second type charging pile.

[0084] Through the above connection structure, the second type charging pile can use the power of the idle power module and / or energy storage device in the first type charging pile to charge the load.

[0085] A charging embodiment Figure 8 As shown, the first type of charging pile, such as the 7# charging pile, is charging the vehicle. At the same time, the second type of charging pile, such as the 8# charging pile, is also charging the vehicle. The first type of charging pile can use the electric energy in the energy storage device and / or its internal power module to charge the load. Similarly, the second type of charging pile can also use the electric energy in the energy storage device and / or the power module inside the first type of charging pile to charge the load. The charging information during the charging process can be transmitted to the local scheduling center through the communication line.

[0086] In one embodiment, when controlling the output of electric energy by the energy storage device, it can be considered whether the total charging power of the charging station has reached an upper limit. Generally, a power threshold is set for a charging station, and the threshold is the maximum charging power of the charging station, that is, it represents the maximum charging capacity of the charging station. The power threshold can be a pre-set fixed threshold, or it can be a dynamic value that is automatically adjusted based on usage. For example, when the charging station adds or reduces charging piles, or when a charging pile fails, the number of available charging piles changes. At this time, the charging power that the entire charging station can provide changes, and the power threshold will also change accordingly.

[0087] In the specific implementation, the total charging power of the current charging station should be obtained, where the total charging power of the charging station refers to the sum of the charging powers of all running charging piles. Specifically, the charging station can obtain the charging power of each running charging pile in real time, calculate the sum of the charging power of all running charging piles, and use it as the total charging power of the charging station.

[0088] If the total charging power of the charging station is greater than the power threshold, it means that the current charging station has reached its maximum charging capacity. In order to ensure the safety of the charging station, the power modules in the first type of charging piles are not allowed to charge new loads, such as vehicles, to avoid the power of the entire charging station exceeding the standard. At this time, if there is a new load to be charged, the electric energy in the energy storage device can be used to charge the load.

[0089] In one implementation, if the total charging power of the charging station is greater than a power threshold, the energy storage device is controlled to charge the load connected to the first target charging pile.

[0090] Among them, the first target charging pile is a charging pile that is not equipped with a power module inside, that is, the first target charging pile is the second type of charging pile mentioned above.

[0091] To elaborate, since the second type of charging pile is not equipped with a power module, the idle power module in the first type of charging pile and the power in the energy storage device can be used to charge the load. Since the total charging power of the charging station is greater than the power threshold, in order to avoid excessive power, other power modules can no longer be called, and the second type of charging pile can use the power in the energy storage device to charge the load. Figure 7 The power line between the energy storage device and the second type of charging pile outputs the electrical energy of the energy storage device to the second type of charging pile, so that the second type of charging pile uses the gun line to power the load, so that even if the total output power of the first type of charging pile has reached the maximum value of the charging power station, the vehicle can continue to be charged.

[0092] In one implementation, when controlling the energy storage device to charge the load connected to the first target charging pile, the electricity price may also be considered to fully utilize the electric energy in the energy storage device and maximize profits.

[0093] Specifically, when the current moment is a peak power period, if there is a load to be charged, the charging pile recommendation information is output to the load. If the charging pile selected by the load is a first target charging pile, the energy storage device is controlled to provide electrical energy to the first target charging pile to charge the load connected to the first target charging pile.

[0094] To expand, in some light storage and charging scenarios, the power of the energy storage device comes from the charging pile. Since the power in the energy storage device is stored during the valley period, the cost is low, and the output during the peak period can maximize the profit and bring higher economic benefits. Therefore, when there is a load to be charged during the peak period, a charging pile can be recommended for the load. Since the total charging power of the charging station is greater than the power threshold at this time, the second type of charging pile can be recommended first. In one implementation, when recommending charging piles to users, all available second type charging piles can be recommended to users, or some charging piles can be recommended. For example, when making specific recommendations, the second type of charging pile closest to the load can be recommended to make the load travel the shortest distance, or the second type of charging pile with a low usage rate can be recommended to improve the utilization rate of the charging pile. It should be noted that whether the second type of charging pile is recommended is related to the power in the energy storage device. If the power is large, the second type of charging pile can be recommended. If the power is small, even if the second type of charging pile is recommended, there is not enough power to charge the load, and the recommendation operation can be omitted.

[0095] After the local scheduling center determines the recommended charging pile, the charging pile recommendation information can be output to the load, and the recommended charging pile can be displayed on the load's display terminal. The user can select the charging pile he needs from it through touch, voice, etc. At this time, the user selects the charging pile to be locked, and the load can cruise to the second type of charging pile according to the driving route issued by the local scheduling center. If the user cancels the charging pile, the charging pile will be unlocked.

[0096] If the charging pile selected by the load is the first target charging pile, the local scheduling center continues to confirm with the user whether to charge. If the user chooses to charge, the power output instruction is output to the energy storage device, and the energy storage device outputs electric energy to the first target charging pile, and the first target charging pile charges the load.

[0097] In one implementation, during the charging process using an energy storage device, if the power output of the current energy storage device is less than the power required by the load, at this time, in order to meet the user's charging needs, the power of the energy storage module can be used to charge the load first, and when there is a new released power module, the power module is called to charge the vehicle.

[0098] Specifically, during the vehicle charging process, a new idle power module will be released in the first type of charging pile when the device is in the power reduction stage. If a released power module is detected, a prompt message, such as a power delivery prompt message, is output to the target device. For example, a message "There is an existing released power module, please confirm whether to increase the charging power" can be sent to the vehicle terminal. If the user selects yes on the vehicle terminal, the local scheduling center determines that it has received confirmation information from the target device regarding the power delivery prompt message. At this time, the first target charging pile is controlled, such as the second type of charging pile calling the released power module, and the electric energy of the released power module is output to the vehicle. If the user selects no on the vehicle terminal, it is considered that the user does not want to increase the charging power, and at this time, it is prohibited to use the released power module to charge the vehicle.

[0099] It should be noted that the user can also choose automatic delivery on the vehicle terminal, that is, when there is a released power module, the charging pile is directly controlled to call the released power module to charge the vehicle without asking the user, so as to increase the vehicle charging power.

[0100] It should be noted that if after calling the released power module, the sum of the output powers of the power modules called by the charging pile is not less than the charging power required by the load, then there is no need to call a new released power module, and the monitoring operation of the released power module can be stopped. If, after calling the released power module, the charging power required by the target device is still not met, the power module release monitoring operation can be continued, and when there is a new released power module, the above-mentioned prompt information output operation is performed, and it is performed sequentially until the power module release monitoring operation is stopped when the charging power required by the load is met.

[0101] In this embodiment, when the local dispatching center detects that other charging piles in the charging station have released power module information, it will deliver the power information to the user terminal or vehicle terminal using the target charging pile. The user can deliver power according to actual needs or set it to automatic delivery. After receiving the user's selection, the local dispatching center performs power switching to increase the vehicle charging power. At this time, due to the increase in charging power, the vehicle charging time will be shortened.

[0102] In another implementation, using the energy storage device to charge a load may also be:

[0103] If the total charging power of the charging station is not greater than the power threshold, the first target charging pile is controlled to use the electric energy in the energy storage device and the idle power modules in other charging piles to charge the load; the first target charging pile is a charging pile that is not equipped with a power module inside.

[0104] Specifically, when the total charging power of the charging station is not greater than the power threshold, it means that the power in the power module can be called to charge the load at this time. Then, according to the load demand power, the first target charging pile can be controlled to use the electric energy in the energy storage device and the idle power modules in other charging piles to charge the load. At this time, the output power of the energy storage device is the difference between the load demand power and the total output power of all the idle power modules that can be called in the first type of charging pile, so that the total output power of the second type of charging pile is the load demand power. If the sum of the output power of the energy storage device and the total output power of all the power modules that can be called in the first type of charging pile is greater than the load demand power, at this time, some of the available idle power modules can be selected to charge the load according to the power demand, or some of the available idle power modules and energy storage devices can be selected to charge the load, depending on the actual configuration.

[0105] In one embodiment, before controlling the charging of the energy storage device, the local scheduling middle station can configure the energy storage device parameters according to the local real-time electricity price. The energy storage device parameters can be parameters such as electricity prices, and then perform configuration analysis, and finally generate a valley-peak charging strategy for the energy storage device, and send the valley-peak charging strategy to the energy storage device, so that the energy storage device is charged only during the valley power period and discharged during the peak power period.

[0106] In this embodiment, the energy storage device is charged and discharged according to the local peak and valley electricity prices. The energy storage device can be charged during the period of flat electricity prices, and the energy storage device can be discharged during the peak price period to maximize profits.

[0107] In one implementation, when the total charging power of the charging station is greater than the power threshold, the local dispatching center can also recommend a first type of charging pile containing a power module. At this time, the first type of charging pile only uses the energy storage device to output power, and does not use the internal power module to output power. If the user chooses to charge with the first type of charging pile, the power output instruction can be output to the energy storage device, and the energy storage device outputs power to the first type of charging pile selected by the user, and the first type of charging pile charges the load.

[0108] In one implementation, when charging a load, if the output power of the first type of charging pile does not meet the power demand of the load, the first type of charging pile can use the electric energy in the energy storage device to charge the load. Then, using the energy storage device to charge the load includes:

[0109] When the output power of the second target charging pile cannot meet the power demand of the load, the load is charged by utilizing the electric energy in the energy storage device and the power module inside the second target charging pile.

[0110] Among them, the second target charging pile is a charging pile with a power module configured inside, that is, the first type of charging pile mentioned above. In actual scenarios, if the load is charged using the first type of charging pile, even if the power module in the first type of charging pile outputs full power, the total output power of the entire charging pile is still less than the load demand power. At this time, in order to meet the power demand of the load, the first type of charging pile can simultaneously use the electric energy in the energy storage device and the power module inside the first type of charging pile to charge the load. At this time, the electric energy of the energy storage device will be output to the DC input side of the first type of charging pile, and the output power of the energy storage device is the difference between the load demand power and the total output power of the power module in the first type of charging pile, so that the total output power of the first type of charging pile is the load demand power.

[0111] In this embodiment, if the output power of the power module in the first type of charging pile cannot meet the required power of the load, the energy storage device can cooperate with the power module to output power, so that the power of the entire charging station can be maximized. At this time, the current released by the energy storage device is sent to the DC input side of the power module of the charging pile, and the charging pile outputs power through the power module. During the process of the energy storage device outputting electric energy, the energy storage device can receive the dispatch of the dispatching center and adjust the released current and release time.

[0112] In the above embodiment, when using the energy storage device to charge the load, the electric energy of the energy storage device can also be considered to avoid the problem of reducing the life of the energy storage device due to outputting electric energy at a lower power level. Therefore, in one implementation, when the power of the energy storage device reaches a threshold, a message can be fed back to the dispatching center. At this time, the energy storage has charging capabilities, and the electric energy output by the energy storage device can be used to charge the load. The current time period can be further detected. If this time period is a peak power period, the energy storage device can be controlled to output electric energy in the above manner. When the power of the energy storage device does not reach the threshold, the energy storage device is not used to charge the load.

[0113] After charging the load in the above manner, if the vehicle is fully charged, the charging operation needs to be stopped. Specifically, when the charging pile detects that charging is completed (such as the vehicle is fully charged or the vehicle charging time reaches the time set by the user), it sends a stop charging request to the local scheduling center. The local scheduling center receives the stop charging request sent by the charging pile, responds to the stop charging request, sends a power stop output instruction to the energy storage device, and the energy storage device stops outputting electrical energy. If the second type of charging pile also calls for electrical energy from other power modules, the second type of charging pile will be controlled to stop calling the power module. Among them, controlling to stop calling the power module can be: disconnecting the above-mentioned switch that has been closed in the DC contactor, and finally turning off the power output of the second type of charging pile.

[0114] In this embodiment, after charging is completed, the local dispatching center receives a request to stop charging from the charging pile, and then recycles the power module and stops power output to stop charging the vehicle. After the charging gun is unplugged from the vehicle charging port, other vehicles can be charged. When charging other vehicles, the above control operation is repeated.

[0115] Based on the above-mentioned embodiment of the power output control method, another embodiment of the present application provides a power output control device, referring to Fig. 9 , which may include:

[0116] A power acquisition module 11, used to acquire the output power of the power module when the power module is running;

[0117] The power control module 12 is used to control the power module to output according to the rated output power if the output power is less than the rated output power of the power module, so as to store the multi-output electric energy into the energy storage device.

[0118] In one implementation, the power control module 12 includes:

[0119] The first control submodule is used to obtain the current time period, and control the power module to output according to the rated output power when the output power is less than the rated output power of the power module and the current time period belongs to the valley power period.

[0120] In one implementation, the power control module 12 includes:

[0121] The second control submodule is used to control the power module to output according to the rated output power if the output power is less than the rated output power of the power module and the power output rate of the power module is less than an output rate threshold.

[0122] In one implementation, the power output control device further includes a charging control module, wherein the charging control module is used to charge a load using the energy storage device.

[0123] In one implementation, the charging control module includes:

[0124] The first charging control submodule is used to control the energy storage device to charge the load connected to the first target charging pile if the total charging power of the charging station is greater than the power threshold, wherein the first target charging pile is a charging pile that is not equipped with a power module.

[0125] In one implementation, the first charging control submodule includes:

[0126] A push unit, configured to output charging pile recommendation information to a load to be charged if the current time is a peak power period;

[0127] The power output unit is used to control the energy storage device to provide power to the first target charging pile if the charging pile selected by the load is the first target charging pile, so as to charge the load connected to the first target charging pile.

[0128] In one implementation, the charging control module includes:

[0129] The second charging control submodule is used to charge the load by utilizing the electric energy in the energy storage device and the power module inside the second target charging pile when the output power of the second target charging pile cannot meet the power demand of the load; the second target charging pile is a charging pile equipped with a power module inside.

[0130] In this embodiment, when the power module is running, the output power of the power module is obtained. If the output power is less than the rated output power of the power module, it means that the current utilization rate of the power module is low. In this case, the power module is controlled to output according to the rated output power. At this time, the excess output electric energy can be stored in the energy storage device, thereby improving the utilization rate of the power module and increasing the service life of the power module.

[0131] It should be noted that, for the working process of each module, sub-module and unit in this embodiment, please refer to the corresponding description in the above embodiment, which will not be repeated here.

[0132] A controller is also provided in an embodiment of the present application for executing the above-mentioned power output control method.

[0133] The present application also provides a power output control system in an embodiment, including the above-mentioned controller and energy storage device, wherein the controller can be the above-mentioned local scheduling middle station, and the connection structure between the local scheduling middle station and the energy storage device can refer to Figure 5 shown.

[0134] In one implementation, the input end of the energy storage device is connected to the power output line of the power module, and the output end of the energy storage device is connected to the DC input side of the charging pile. For details, refer to the above corresponding description.

[0135] An embodiment of the present application also provides a computer program product including computer-readable instructions. When the computer-readable instructions are executed on an electronic device, the electronic device implements any power output control method provided in the embodiment of the present application.

[0136] A computer-readable storage medium is also provided in an embodiment of the present application. The storage medium carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any power output control method provided in the embodiment of the present application.

[0137] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power output control method, characterized in that: include: When the power module is running, obtaining the output power of the power module; If the output power is less than the rated output power of the power module, the power module is controlled to output according to the rated output power, so as to store the multi-output electric energy into the energy storage device.

2. The power output control method according to claim 1, characterized in that: If the output power is less than the rated output power of the power module, controlling the power module to output according to the rated output power includes: Get the current period; When the output power is less than the rated output power of the power module and the current period belongs to a valley power period, the power module is controlled to output according to the rated output power.

3. The power output control method according to claim 1, characterized in that: If the output power is less than the rated output power of the power module, controlling the power module to output according to the rated output power includes: If the output power is less than the rated output power of the power module and the power output rate of the power module is less than an output rate threshold, the power module is controlled to output according to the rated output power.

4. The power output control method according to claim 2, characterized in that: Also includes: The energy storage device is used to charge the load.

5. The power output control method according to claim 4, characterized in that: Using the energy storage device to charge a load includes: If the total charging power of the charging station is greater than the power threshold, the energy storage device is controlled to charge the load connected to the first target charging pile, wherein the first target charging pile is a charging pile that is not equipped with a power module.

6. The power output control method according to claim 5, characterized in that: Controlling the energy storage device to charge a load connected to a first target charging pile includes: When the current time is a peak power period, if there is a load to be charged, output charging pile recommendation information to the load; If the charging pile selected by the load is the first target charging pile, the energy storage device is controlled to provide electric energy to the first target charging pile to charge the load connected to the first target charging pile.

7. The power output control method according to claim 4, characterized in that: Using the energy storage device to charge a load includes: When the output power of the second target charging pile cannot meet the power demand of the load, the load is charged together by utilizing the electric energy in the energy storage device and the power module inside the second target charging pile; the second target charging pile is a charging pile equipped with a power module inside.

8. A power output control device, characterized in that: include: A power acquisition module, used to acquire the output power of the power module when the power module is running; The power control module is used to control the power module to output according to the rated output power if the output power is less than the rated output power of the power module, so as to store the multi-output electric energy into the energy storage device.

9. A controller, characterized in that: Used to execute the power output control method as claimed in any one of claims 1 to 7.

10. A power output control system, characterized in that: It comprises the controller as claimed in claim 9 and an energy storage device.

11. The power output control system according to claim 10, characterized in that: The input end of the energy storage device is connected to the power output line of the power module, and the output end of the energy storage device is connected to the DC input side of the charging pile.

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