JP-2026075312-A - Charging system

JP2026075312AJP 2026075312 AJP2026075312 AJP 2026075312AJP-2026075312-A

Abstract

[Problem] To provide a charging system that can automatically adjust the target demand to an appropriate value at an early stage. [Solution] The charging system A1 includes a plurality of charging devices 2 for charging the battery 54 of an electric vehicle 5, and a charging control device 1 for controlling them. The charging control device 1 includes a power control unit 112 that controls the overall output power based on a target demand, a full charge determination unit 115 that determines whether or not the connected battery 54 has been fully charged for each of the plurality of charging devices 2, a ratio detection unit 116 that detects the full charge ratio, which is the percentage of charging devices 2 that have completed charging, and a target demand adjustment unit 117 that adjusts the target demand based on the full charge ratio. The target demand adjustment unit 117 decreases the target demand according to the amount of power surplus during the charging period if the full charge ratio at the end of the charging period is 1 or higher, and increases the target demand according to the amount of power deficit after the end of the charging period if it is less than 2. [Selection Diagram] Figure 1

Inventors

花尾隆史
大堀彰大
中川耀仁
阿部幸司
堀祐二
藤澤直

Assignees

株式会社ダイヘン
株式会社関電エネルギーソリューション

Dates

Publication Date: 20260508
Application Date: 20241022

Claims (5)

Multiple charging devices for charging the battery of an electric mobile body that moves by driving an electric motor with the power of the battery, A charging control device that controls the plurality of charging devices, Equipped with, The charging control device is A power control unit controls the overall output power based on the target demand, Each of the plurality of charging devices includes a full charge determination unit that determines whether or not the connected storage battery has been fully charged, A percentage detection unit that detects the full charge percentage, which is the percentage of charging devices that have completed charging, A target demand adjustment unit adjusts the target demand based on the full charge ratio, Equipped with, The aforementioned target demand adjustment unit is: If the full charge percentage at the end of the charging period is equal to or greater than the first percentage, the target demand is reduced according to the amount of power reserve during the charging period. If the full charge percentage at the end of the charging period is less than the second percentage, the target demand is increased according to the amount of power shortage after the end of the charging period. Charging system.
The aforementioned power margin is the value obtained by accumulating the difference between the target demand and the actual demand value of the total output power during the charging period. The aforementioned power deficit is the cumulative value of the total charging power of the multiple charging devices during the deficit determination period, which begins from the end of the charging period. The charging system according to claim 1.
The target demand adjustment unit reduces the target demand according to the power reserve amount during the last charging period if the full charge ratio at the end of the charging period is equal to or greater than the first ratio for a predetermined number of consecutive days. The charging system according to claim 1.
The system further includes a special day determination unit that determines that a day is a special day if the total value of the charging power of the multiple charging devices changes significantly during the charging period. If the target demand adjustment unit determines that it is a special day, it adds a set value to the target demand regardless of the full charge percentage. The charging system according to claim 1.
The charging control device is A charging demand detection unit detects the charging demand, which is the demand value of the power output by each of the aforementioned multiple charging devices at the demand time limit. An abnormality detection unit for detecting the occurrence of an abnormality in each of the aforementioned multiple charging devices, Furthermore, The full charge determination unit determines that the charging of the connected battery is complete if the detected charging demand is below the determination threshold value and no abnormality is detected in the charging device. A charging system according to any one of claims 1 to 4.

Description

This invention relates to a charging system comprising multiple charging devices for charging electric vehicles and the like. In recent years, with the increasing popularity of electric vehicles, the development of charging systems for their batteries has progressed. A charging system comprises multiple charging devices and a charging control device that manages them. Furthermore, charging systems are sometimes integrated into the energy management systems of the facilities where they are installed. In this case, the charging control device receives a target demand input from a higher-level energy management system and controls the charging system's output power to ensure it does not exceed the target demand. For example, in a charging system installed in an apartment building, each charging station is connected to a resident's electric vehicle, and charging takes place overnight. In this case, as long as charging is completed by morning, there is no problem, and power consumption can be distributed. However, since the charging control device controls the output power of the charging system based on the input target demand, manually changing the target demand was necessary to distribute power consumption. When manually changing the target demand, if it is reduced too much, charging may be insufficient by morning, potentially affecting the use of electric vehicles. Setting an appropriate target demand manually is difficult and cumbersome. Patent Document 1 discloses a charging system capable of automatically adjusting the target demand to an appropriate value. This charging system detects the full charge percentage, which is the percentage of charging devices that have completed charging. If the full charge percentage is equal to or greater than a first percentage, it decreases the target demand by a first set value. If the full charge percentage is less than a second percentage, it increases the target demand by a second set value. As a result, the charging system can automatically adjust the target demand to an appropriate value according to the full charge percentage. Japanese Patent Publication No. 2024-59216 This is a block diagram showing the overall configuration of the charging system according to the first embodiment.This is a time chart illustrating the adjustment of target demand by the target demand adjustment unit, where (a) shows the case where the target demand is increased, and (b) shows the case where the target demand is decreased.This is an example flowchart illustrating the full charge percentage detection process performed by the control unit.This is an example of a flowchart illustrating the target demand adjustment process performed by the control unit.This is an example flowchart illustrating a modified version of the target demand adjustment process performed by the control unit.This diagram illustrates a modified charging control device; (a) is a block diagram showing the internal configuration, and (b) is an example of a flowchart illustrating the target demand change process performed by the control unit.This is a block diagram showing the overall configuration of the charging system according to the second embodiment.This is a block diagram showing the overall configuration of the charging system according to the third embodiment. The embodiments of the present invention will be described in detail below with reference to the drawings. [First Embodiment] Figure 1 is a block diagram showing the overall configuration of the charging system A1 according to the first embodiment. The charging system A1 is equipment for charging an electric vehicle 5. The electric vehicle 5 is an automobile equipped with an electric motor as a power source and a storage battery 54 that supplies power to the electric motor, and includes not only so-called electric vehicles that use only an electric motor as a power source, but also hybrid vehicles that have an internal combustion engine as well. The charging system A1 includes a charging control device 1 and a plurality of charging devices 2. Multiple charging devices 2 are arranged in a parking lot or similar location to charge the electric vehicle 5. In this embodiment, the charging devices 2 are so-called standard charging devices, and they charge the battery 54 of the electric vehicle 5 using single-phase AC power from the commercial power supply 9. The number of charging devices 2 provided in the charging system A1 is not limited. Each charging device 2 is connected to the electric vehicle 5 by a charging connector 25c located at the end of a charging cable 25, which is connected to the plug-in connector 55 of the electric vehicle 5. In this embodiment, the charging devices 2 do not have the function of communicating with the connected electric vehicle 5. Therefore, the charging devices 2 cannot detect when charging is complete based on information from the electric vehicle 5. The charging device 2 includes a control unit 21, a communication unit 2