An AC orderly charging control system and control method for electric vehicles

Abstract

The present invention provides an AC orderly charging control system and a control method for electric vehicles, which relates to the technical field of AC charging for electric vehicles. The system includes a power supply device, a charging information processing unit, and a charging power distribution unit that are communicatively connected to each other. The power supply device is used to receive a charging request from a target electric vehicle. The charging information processing unit is used to determine the power consumption load and grid capacity of the target electric vehicle during the charging process according to the grid load data in the area where the power supply device is located and the charging request data of the electric vehicle. The charging power distribution unit is used to distribute the charging power of electric vehicles with different charging times according to the power consumption load and grid capacity, and control the output power of the power supply device. In this way, the charging power can be adaptively distributed according to the charging power request of the electric vehicle and the power supply capacity of the grid, and the charging efficiency can be improved on the premise of meeting the charging requirements of the electric vehicle.

Description

Technical Field

[0001] The present invention belongs to the technical field of AC charging for electric vehicles, and particularly relates to an AC orderly charging control system and control method for electric vehicles. Background Technique

[0002] The statements in this part merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] With the increasing number of electric vehicles and the rapid rise in electricity consumption, the peak power load of the national power grid has increased significantly, causing great impacts on regional charging facilities and grid load. Currently, the charging method of electric vehicles in the industry is mostly plug-and-charge, and the charging equipment cannot flexibly adjust the charging power according to the charging time period and grid load. In addition, some unreasonable orderly charging strategies have also exacerbated the instability of the national power grid to a certain extent.

[0004] Different from the output of a fixed power of traditional AC charging equipment, the output power range of AC orderly charging equipment is 1.3kW - 7kW, and an orderly charging strategy is implemented according to the principles of "first come, first served" and reservation charging. However, limited by the limited AC charging resources, in the actual use process, problems such as the charging resources being occupied or the vehicle not leaving the charging area in time after being fully charged are very likely to occur, thus affecting the charging efficiency of electric vehicles and the charging experience of users. Summary of the Invention

[0005] In order to solve the above problems, the present invention proposes an AC orderly charging control system and control method for electric vehicles, which adaptively allocate the charging power according to the charging power request of the electric vehicle and the power supply capacity of the power grid, and improve the charging efficiency on the premise of meeting the charging requirements of the electric vehicle.

[0006] According to some embodiments, the present invention adopts the following technical solutions:

[0007] In the first aspect, an embodiment of the present invention provides an AC orderly charging control system for electric vehicles, including a power supply device, a charging information processing unit, and a charging power distribution unit that are communicatively connected to each other;

[0008] The power supply device is used to receive the charging request of the target electric vehicle;

[0009] The charging information processing unit is used to determine the power consumption load and grid capacity of the target electric vehicle during the charging process according to the grid load data and the charging request data of the electric vehicle in the area where the power supply device is located;

[0010] The charging power distribution unit is used to distribute the charging power of electric vehicles with different charging durations according to the electricity consumption load and the grid capacity, and control the output power of the power supply device.

[0011] In a possible implementation manner, the charging request includes a vehicle identification code, a battery capacity, a state of charge of the battery, a charging voltage, a charging current, and a charging power; the charging information processing unit is further used to determine the charging duration of the target electric vehicle according to the charging request.

[0012] In a possible implementation manner, the charging power distribution unit is specifically used for:

[0013] If the electricity consumption load is lower than a preset electricity consumption load threshold and the grid capacity is lower than a preset capacity lower limit value, then control the power supply device to output full power according to the actual charging power requested by the target electric vehicle;

[0014] Or, if the electricity consumption load is equal to a preset electricity consumption load threshold and the grid capacity is between a preset capacity lower limit value and a capacity upper limit value, obtain the charging time and charging power of other power supply devices in the area where the power supply device is located except this power supply device, reduce the charging power of the charged vehicles in the area, and preferentially meet the charging power requests of the charging vehicles with a charging duration less than a preset threshold according to the charging duration;

[0015] Or, if the electricity consumption load is equal to a preset electricity consumption load threshold and the grid capacity reaches the capacity upper limit value, obtain the charging time and charging power of other power supply devices in the area where the power supply device is located except this power supply device, and under the premise of meeting the normal charging requirements of electric vehicles, lower the output power of the power supply device with a charging duration greater than a preset threshold.

[0016] In a possible implementation manner, the power supply device is further connected with a charging status display unit, and the charging status display unit is used to display the charging information and output power information of the target electric vehicle, and display the charging status through an indicator light.

[0017] In a possible implementation manner, the charging status includes a ready-to-charge status, a charging heating status, a normal charging status, an indicating charging fault status, an indicating charging completion status, and an indicating charging gun insertion status; different charging statuses correspond to different indicator light control instructions, and the indicator light is controlled to flash through the indicator light control instructions.

[0018] In a possible implementation manner, the charging status display unit is further connected with a charged vehicle parking and transportation unit, and the charged vehicle parking and transportation unit is used to issue a parking and transportation instruction according to the charging status information of the charging status display unit, and park and transport the fully charged electric vehicle out of the charging area.

[0019] In a possible implementation manner, the charging status display unit is further configured to change the indicator light control instruction and control the indicator light to flash after the charging vehicle parking unit parks the fully charged electric vehicle out of the charging area.

[0020] In a second aspect, an embodiment of the present invention further provides an AC orderly charging control method for an electric vehicle, including:

[0021] Receiving a charging request of a target electric vehicle;

[0022] Determining the power consumption load and grid capacity of the target electric vehicle during the charging process according to the grid load data in the area where the power supply device is located and the charging request data of the electric vehicle;

[0023] Allocating the charging power of electric vehicles with different charging durations according to the power consumption load and grid capacity, and controlling the output power of the power supply device.

[0024] In a possible implementation manner, the charging request includes a vehicle identification code, a battery capacity, a state of charge of the battery, a charging voltage, a charging current, and a charging power; determining the charging duration of the target electric vehicle according to the charging request.

[0025] In a possible implementation manner, allocating the charging power of electric vehicles with different charging times according to the power consumption load and grid capacity, and controlling the output power of the power supply device, includes:

[0026] If the power consumption load is lower than a preset power consumption load threshold and the grid capacity is lower than a preset capacity lower limit value, controlling the power supply device to output at full power according to the actual requested charging power of the target electric vehicle;

[0027] Or, if the power consumption load is equal to the preset power consumption load threshold and the grid capacity is between the preset capacity lower limit value and the capacity upper limit value, obtaining the charging time and charging power of other power supply devices in the area where the power supply device is located except this power supply device, reducing the charging power of the charged vehicles in the area, and preferentially satisfying the charging power requests of the charging vehicles with a charging duration less than a preset threshold according to the charging duration;

[0028] Or, if the power consumption load is equal to the preset power consumption load threshold and the grid capacity reaches the capacity upper limit value, obtaining the charging time and charging power of other power supply devices in the area where the power supply device is located except this power supply device, and reducing the output power of the power supply device with a charging duration greater than a preset threshold on the premise of meeting the normal charging requirements of the electric vehicle.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] (1) The present invention provides an AC orderly charging control system for electric vehicles, including a power supply device, a charging information processing unit, and a charging power distribution unit that are communicatively connected to each other. The system intelligently and flexibly adjusts the AC output power of the charging facilities according to factors such as the charging demand of electric vehicles, the usage of charging equipment, and the regional power grid load. In this way, on the premise of meeting the charging demand of electric vehicles, the charging efficiency can be improved, and the power grid load fluctuation can be alleviated, promoting peak shaving and valley filling of the power grid, and enhancing the convenience and efficiency of electric vehicle charging.

[0031] (2) By setting a charging status display unit and a charging status display unit, the electric vehicle is dynamically parked according to the charging status of the electric vehicle, and the electric vehicle is intelligently guided to perform AC orderly charging, thereby improving the utilization rate of the power supply device and ensuring the maximization of the usage rate of AC charging resources.

[0032] Advantages of additional aspects of the present invention will be given in part in the following description, become obvious in part from the following description, or be understood through the practice of the present invention.

[0033] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are specifically exemplified and described in detail in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The schematic diagrams in the specification that form a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0035] Figure 1 It is a schematic diagram of the architecture of the AC orderly charging control system for electric vehicles provided by Embodiment 1 of the present invention;

[0036] Figure 2 It is a schematic flowchart of the AC orderly charging control method provided by Embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The present invention will be further described below in conjunction with the drawings and embodiments.

[0038] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanations of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0039] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] Embodiment 1:

[0041] As Figure 1 shown, this embodiment provides an AC orderly charging control system for electric vehicles, which includes a power supply device, a charging information processing unit, and a charging power distribution unit that are communicatively connected to each other;

[0042] The power supply device is used to receive the charging request of the target electric vehicle; the charging information processing unit is used to determine the power consumption load and grid capacity of the target electric vehicle during the charging process according to the grid load data and the charging request data of the electric vehicle in the area where the power supply device is located; the charging power distribution unit is used to allocate the charging power of electric vehicles with different charging durations according to the power consumption load and grid capacity, and control the output power of the power supply device.

[0043] In a specific implementation, when the target electric vehicle inserts the charging gun and is ready to charge, the power supply device receives the charging request of the target electric vehicle and transmits the charging request to the charging information processing unit. Here, the charging request includes information such as the vehicle identification number (VIN), battery capacity, state of charge (SOC) of the battery, charging voltage, charging current, and charging power.

[0044] The charging information processing unit is conductively connected to the electric vehicle through the power supply device, and determines the power consumption load and grid capacity of the target electric vehicle during the charging process according to the grid load data and the charging request data of the electric vehicle in the area where the power supply device is located. In a specific application, the charging information processing unit includes a power conversion module, a 32-bit MCU controller, a sampling module, a storage module, a CAN communication module, a 5G communication module, etc., and mainly performs tasks such as sampling, storing, comparing, and communicating the charging request data and grid load data sent by the electric vehicle, so as to analyze and process the vehicle-side data and grid load data during the charging process.

[0045] The charging power distribution unit performs real-time dynamic power regulation and distribution based on the data analysis results of the charging information processing unit, i.e., the charging demand at the vehicle end and the grid load situation; the charging power distribution unit receives information such as the electric vehicle SOC, charging power request, and planned charging duration transmitted by the charging information processing unit through two-way CAN communication, and according to the power consumption load situation in the area where the power supply equipment is located, respectively in three different working conditions of sufficient power consumption load, large power consumption load, and overloaded power consumption load, combined with the charging duration of different electric vehicles, optimizes the charging function distribution, and on the premise of meeting the normal charging demand of the electric vehicle, moderately reduces the power output of the power supply equipment with a longer charging duration, suspends processing the charging requests of some vehicles close to the fully charged state, and puts some power supply equipment with a long charging time and a large cumulative output power into sleep mode. Specifically, it includes the following situations:

[0046] 1) If the power consumption load is lower than the preset power consumption load threshold and the grid capacity is lower than the preset capacity lower limit value, then control the power supply equipment to output full power according to the actual charging power requested by the target electric vehicle;

[0047] 2) If the power consumption load is equal to the preset power consumption load threshold and the grid capacity is between the preset capacity lower limit value and the capacity upper limit value, then obtain the charging time and charging power of other power supply equipment in the area where the power supply equipment is located except this power supply equipment, reduce the charging power of the charged vehicles in the area, and preferentially meet the charging power requests of the charging vehicles with a charging duration less than the preset threshold according to the charging duration;

[0048] 3) If the power consumption load is equal to the preset power consumption load threshold and the grid capacity reaches the capacity upper limit value, then obtain the charging time and charging power of other power supply equipment in the area where the power supply equipment is located except this power supply equipment, and on the premise of meeting the normal charging demand of the electric vehicle, reduce the output power of the power supply equipment with a charging duration greater than the preset threshold. Specifically, suspend processing the charging requests of some vehicles close to the fully charged state, and put some power supply equipment with a long charging time and a large cumulative output power into sleep mode.

[0049] Optionally, the power supply equipment is also connected with a charging status display unit, and the charging status display unit is used to display the charging information and output power information of the target electric vehicle, and display the charging status through an indicator light. Here, the charging information of the target electric vehicle includes but is not limited to one or more of the charging voltage, charging current, battery capacity, battery SOC, charged duration, and remaining charging duration.

[0050] The charging states include the ready-to-charge state, the charging heating state, the normal charging state, the indicating charging fault state, the indicating charging completion state, and the indicating charging gun plugging state; different charging states correspond to different indicator light control instructions, and the indicator lights are controlled to flash through the indicator light control instructions. For example: "Red / yellow / blue lights alternate breathing" indicates the ready-to-charge state, "Yellow light breathing" indicates the charging heating state, "Blue light breathing" indicates the normal charging state, "Red light on constantly" indicates the charging fault state, "Green light on constantly" indicates the charging completion state, and "Blue light on constantly" indicates the charging gun plugging state.

[0051] Optionally, the charging state display unit is further connected to a charging vehicle parking and transportation unit, and the charging vehicle parking and transportation unit is used to issue a parking and transportation instruction according to the charging state information of the charging state display unit, and park and transport the fully charged electric vehicle out of the charging area. In a specific application, the charging vehicle parking and transportation unit issues an instruction through information interaction with the charging information processing unit and the charging state display unit, and uses the 5G communication method. After the AGV car wireless receiving module receives the parking instruction issued by the charging vehicle parking and transportation unit, it intelligently and dynamically parks and transports the fully charged electric vehicle out of the charging area and waits for the user to pick up the vehicle.

[0052] Optionally, the charging state display unit is further used to change the indicator light control instruction and control the indicator light to flash after the charging vehicle parking and transportation unit parks and transports the fully charged electric vehicle out of the charging area. For example: After the fully charged electric vehicle is parked and transported out of the charging area, by controlling the indicator lights "Red / yellow / blue lights alternate breathing", it is used to indicate the ready-to-charge state, so that other waiting charging vehicles can identify it and move the vehicle to this power supply device for orderly AC charging.

[0053] In this way, according to the charging state of the electric vehicle, the electric vehicle is dynamically parked and transported, and the electric vehicle can be intelligently guided to perform orderly AC charging, thereby improving the utilization rate of the power supply device and ensuring the maximization of the usage rate of the AC charging resources.

[0054] In this embodiment, an example is given, but it does not mean that the electric vehicle AC orderly charging control system provided by the present invention can only be applied to the charging piles of electric vehicles. It can also be applied to the charging process of other charging devices according to different application scenarios or application objects. On the contrary, the electric vehicle AC orderly charging control system provided by the present invention has strong versatility and can be applied to the charging process of charging devices in other fields.

[0055] Embodiment Two:

[0056] Based on the electric vehicle AC orderly charging control system of Embodiment One, this embodiment further provides an electric vehicle AC orderly charging control method, including:

[0057] Receive the charging request of the target electric vehicle;

[0058] Determine the power consumption load and grid capacity of the target electric vehicle during the charging process according to the grid load data and the charging request data of the electric vehicle within the area where the power supply device is located;

[0059] Allocate the charging power of electric vehicles with different charging durations according to the power consumption load and grid capacity, and control the output power of the power supply device.

[0060] In a specific implementation, as Figure 2 shown, the method specifically includes the following steps:

[0061] Step 1: The power supply device receives the charging request of the electric vehicle, including information such as vehicle VIN code, battery capacity, SOC, charging voltage, charging current, charging power, etc.;

[0062] Step 2: The charging information processing unit determines the power consumption load and grid capacity of the target electric vehicle during the charging process according to the grid load data and the charging request data of the electric vehicle within the area where the power supply device is located;

[0063] Step 3: If the grid capacity in the area where the power supply device is located is sufficient, that is, the power consumption load is lower than the preset power consumption load threshold and the grid capacity is lower than the preset capacity lower limit value, the charging power allocation unit will control the power supply device to output at full power according to the actual requested charging power of the electric vehicle;

[0064] Step 4: If the power consumption load in the area where the power supply device is located is large and the grid capacity is insufficient, that is, the power consumption load is equal to the preset power consumption load threshold and the grid capacity is between the preset capacity lower limit value and the capacity upper limit value, the charging power allocation unit will, according to the charging time and charging power of other surrounding power supply devices, based on the principle of "later request, first processing", intelligently regulate the output power of the power supply device, reduce the charging power of the already charged vehicles, and preferentially meet the charging power requests of newly connected charging vehicles according to the charging duration;

[0065] Step 5: If the power consumption load in the area where the power supply device is located is overloaded and the grid capacity is close to or reaches the capacity upper limit value, the charging power allocation unit will optimize the charging function allocation according to the charging time and charging power of the surrounding power supply devices, further reduce the output power of the power supply device with a longer charging duration, or suspend processing the charging requests of some vehicles that are close to being fully charged, and put some power supply devices that have been charging for a long time and have a large cumulative output power into sleep mode;

[0066] Step 6: If there is a vehicle that has been fully charged, the charging power distribution unit will stop the power output of the power supply equipment used by the vehicle, and the charging status display unit will display "the green light is constantly on" to indicate that the charging is completed;

[0067] Step 7: Further, the charging status display unit includes "red / yellow / blue lights breathing alternately" to indicate the ready-to-charge status, "yellow light breathing" to indicate the charging heating status, "blue light breathing" to indicate the normal charging status, "red light constantly on" to indicate the charging fault status, "green light constantly on" to indicate the charging completed status, and "blue light constantly on" to indicate the charging gun plugged-in status;

[0068] Step 8: When waiting for the vehicle driver to manually remove the AC charging gun of the fully charged vehicle and re-plug it into the power supply equipment, the charging status display unit will have "blue light constantly on", indicating that the charging gun is in the plugged-in state;

[0069] Step 9: The charging vehicle parking unit issues a parking instruction according to the interaction information of the charging status display unit, and parks the fully charged electric vehicle out of the charging area, waiting for the user to pick up the vehicle;

[0070] Step 10: Through the information interaction with the charging vehicle parking unit, the charging status display unit uses "red / yellow / blue lights breathing alternately" to indicate the ready-to-charge status, which is convenient for other waiting vehicles to identify and move the vehicle to this power supply equipment for orderly AC charging.

[0071] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0072] Although the specific implementation manners of the present invention have been described above in conjunction with the accompanying drawings, it is not a limitation on the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or variations that can be made without creative efforts by those skilled in the art are still within the protection scope of the present invention.

Claims

1. An AC orderly charging control system for electric vehicles, characterized in that: It includes a power supply device, a charging information processing unit and a charging power distribution unit that are communicatively connected to each other; The power supply device is used to receive a charging request from a target electric vehicle; The charging information processing unit is used to determine the power load and grid capacity of the target electric vehicle during the charging process based on the grid load data in the area where the power supply equipment is located and the charging request data of the electric vehicle; The charging power distribution unit is used to distribute the charging power to electric vehicles with different charging times according to the power load and grid capacity, and control the output power of the power supply equipment; The charging power distribution unit is specifically used for: If the power load is lower than the preset power load threshold and the grid capacity is lower than the preset capacity lower limit, the power supply equipment is controlled to output full power according to the charging power actually requested by the target electric vehicle; Alternatively, if the power load is equal to a preset power load threshold, and the grid capacity is between a preset lower capacity limit and a preset upper capacity limit, then the charging time and charging power of other power supply devices in the area where the power supply device is located, except for the power supply device, are obtained, the charging power of the already charged vehicles in the area is reduced, and based on the charging time, the charging power requests of the charging vehicles whose charging time is less than the preset threshold are preferentially satisfied; Alternatively, if the power load is equal to a preset power load threshold and the grid capacity reaches the upper capacity limit, the charging time and charging power of other power supply devices in the area where the power supply device is located other than the power supply device are obtained. On the premise of meeting the normal charging needs of the electric vehicle, the output power of the power supply device whose charging time is greater than the preset threshold is reduced.

2. The electric vehicle AC orderly charging control system according to claim 1, characterized in that: The charging request includes a vehicle identification code, battery capacity, battery state of charge, charging voltage, charging current and charging power; the charging information processing unit is further used to determine the charging time of the target electric vehicle according to the charging request.

3. The electric vehicle AC orderly charging control system according to claim 2, characterized in that: The power supply device is further connected to a charging status display unit, which is used to display the charging information and output power information of the target electric vehicle and display the charging status through an indicator light.

4. The electric vehicle AC orderly charging control system according to claim 3, characterized in that: The charging status includes a ready-to-charge status, a charging heating status, a normal charging status, a charging fault indication status, a charging completion indication status, and a charging gun plugged-in status indication; different charging statuses correspond to different indicator light control instructions, and the indicator light is controlled to flash through the indicator light control instructions.

5. The electric vehicle AC orderly charging control system according to claim 3, characterized in that: The charging status display unit is further connected to a charging vehicle parking unit, which is used to issue a parking instruction based on the charging status information of the charging status display unit to park the fully charged electric vehicle out of the charging area.

6. The electric vehicle AC orderly charging control system according to claim 5, characterized in that: The charging status display unit is further configured to change the indicator light control instructions and control the indicator light to flash after the charging vehicle parking unit parks the fully charged electric vehicle out of the charging area.

7. A method for controlling AC orderly charging of electric vehicles, characterized in that: include: receiving a charging request from a target electric vehicle; Determining the power load and grid capacity of the target electric vehicle during charging based on grid load data in the area where the power supply equipment is located and charging request data of the electric vehicle; Allocate charging power to electric vehicles with different charging times according to the power load and grid capacity, and control the output power of the power supply equipment; Allocating charging power to electric vehicles with different charging times according to the power load and grid capacity, and controlling the output power of the power supply device, including: If the power load is lower than the preset power load threshold and the grid capacity is lower than the preset capacity lower limit, the power supply equipment is controlled to output full power according to the charging power actually requested by the target electric vehicle; Alternatively, if the power load is equal to a preset power load threshold, and the grid capacity is between a preset lower capacity limit and a preset upper capacity limit, then the charging time and charging power of other power supply devices in the area where the power supply device is located, except for the power supply device, are obtained, the charging power of the already charged vehicles in the area is reduced, and based on the charging time, the charging power requests of the charging vehicles whose charging time is less than the preset threshold are preferentially satisfied; Alternatively, if the power load is equal to a preset power load threshold and the grid capacity reaches the upper capacity limit, the charging time and charging power of other power supply devices in the area where the power supply device is located other than the power supply device are obtained. On the premise of meeting the normal charging needs of the electric vehicle, the output power of the power supply device whose charging time is greater than the preset threshold is reduced.

8. The electric vehicle AC orderly charging control method according to claim 7, characterized in that: The charging request includes a vehicle identification code, battery capacity, battery state of charge, charging voltage, charging current and charging power; and the charging time of the target electric vehicle is determined according to the charging request.

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