EV Charging Control for Grid Power-Saving Requests
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Solution Overview
Problem
Existing charging systems lack the ability to dynamically adjust charging amounts in response to power saving requests from electric power companies, potentially leading to inefficient energy use and disruptions in vehicle travel plans.
Innovation Solution
A charging system that includes a vehicle with a control device and a charging facility, which allows occupants to select whether to cooperate with power saving requests by limiting charging amounts, with the system determining the necessity of charging at specific facilities along a route to ensure target point arrival while adhering to power saving guidelines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the charging system charges the vehicle without considering power saving requests, then the vehicle can be charged with sufficient energy, but the energy demand increases during periods when power saving is needed
Solution Approach 1:
The charging system dynamically adjusts the charging amount based on power saving requests from the electric power company. The control device receives real-time power saving request information and modifies charging parameters accordingly, transitioning from static charging to dynamic adaptive charging that responds to grid conditions.
Solution Approach 2:
The system changes charging parameters (charging amount, charging rate) based on the power saving request status. When a power saving request is received, the control device adjusts the charging amount to a limited value, thereby changing the operational parameters of the charging process to align with grid demands.
2Loss of energy
If the charging system limits the charging amount to comply with power saving requests, then the energy demand is reduced, but the vehicle may not have sufficient energy to reach the target point
Solution Approach 1:
The control device performs preliminary calculations to determine whether limiting the charging amount will still allow the vehicle to reach the target point. Before executing the limited charging, the system evaluates the charging necessity based on the remaining distance, vehicle efficiency, and required energy, thereby preventing travel disruptions.
Solution Approach 2:
The system incorporates feedback mechanisms where the control device continuously monitors the vehicle's energy status, travel distance, and charging conditions. Based on this feedback, the system adjusts the charging amount in real-time, ensuring that power saving requests are complied with while maintaining the ability to complete the planned travel.
3Device complexity
If the charging system automatically determines charging amount without occupant input, then the charging process is simplified, but the occupant loses control over charging decisions
Solution Approach 1:
The control device acts as an intermediary between the charging facility and the occupant. It receives power saving request information from the electric power company, evaluates the charging necessity, and presents the charging options to the occupant. This intermediary role automates the technical evaluation while preserving occupant autonomy in the final decision.
Solution Approach 2:
The system provides self-service functionality by automatically calculating the required charging amount based on the vehicle's current state and travel plans. The control device independently assesses whether charging is necessary and what amount is appropriate, reducing the burden on the occupant while still allowing them to make the final choice.
Data Source
AI summary
A charging system includes: a vehicle including an in-vehicle battery and a control device; and a charging facility capable of charging the vehicle. The control device determines whether a power saving request has been issued to a region to which the charging facility belongs. When the power saving request is determined to have been issued, the control device encourages an occupant of the vehicle to select whether to cooperate with the power saving request. When a selection result indicating cooperation with the power saving request is acquired, the control device encourages the occupant of the vehicle to select whether to charge the vehicle with a first limited charging amount or a second limited charging amount. The control device permits limitation of the charging amount with which the vehicle is charged from the charging facility, based on selected one of the first limited charging amount and the second limited charging amount.