EV Charging Control for Grid Adjustment Without Timer Charging Disruption
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Solution Overview
Problem
The existing systems for managing power adjustments in electric vehicles (xEVs) face challenges in utilizing their power accumulation devices for external power source adjustments without impairing user convenience, particularly when timer charging is involved, as it can lead to inaccuracies and inconvenience due to disturbances in charging schedules.
Innovation Solution
A server is configured to select and control a group of vehicles to adjust their charging power in sync with an external power source, advancing the start of charging for vehicles with reserved end times within a predetermined period, thereby minimizing disruptions and ensuring accurate power adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the server completely cancels the timer charging reserved for the xEV and uses the power accumulation device for power adjustment of the external power source, then the power adjustment accuracy is improved, but user convenience is significantly impaired
Solution Approach 1:
The server performs preliminary actions by selecting target vehicles before the adjustment period starts and advancing charging start times for vehicles with reserved end times. This preparation ensures that vehicles are ready to participate in power adjustment without disrupting the user's reserved charging end time, thus maintaining convenience while improving adjustment accuracy.
Solution Approach 2:
The server segments the vehicle group into target vehicles and non-target vehicles based on their charging schedules and availability. By selectively controlling only the target vehicles that can participate without conflict, the system achieves power adjustment accuracy while preserving user convenience for vehicles with reserved charging schedules.
2Productivity
If the server uses vehicles with reserved charging schedules for power adjustment, then more vehicles are available for adjustment, but charging schedule accuracy deteriorates due to disturbances
Solution Approach 1:
The server identifies and selects target vehicles before the adjustment period begins, analyzing their reserved charging schedules in advance. By selecting only those vehicles whose charging schedules can accommodate the adjustment requirements, the system maximizes the number of available vehicles while preventing schedule conflicts and maintaining charging accuracy.
Solution Approach 2:
The server dynamically adjusts the charging start times for target vehicles with reserved end times, advancing them when necessary to ensure they complete charging by their reserved end time. This dynamic scheduling allows more vehicles to participate in power adjustment while maintaining the accuracy of their reserved charging schedules.
3Reliability
If the server selects target vehicles before the adjustment period, then power adjustment control is improved, but the complexity of vehicle selection and coordination increases
Solution Approach 1:
The server performs vehicle selection and initial coordination before the adjustment period starts, establishing target vehicle lists and preliminary charging schedules. This advance preparation simplifies the actual power adjustment execution during the adjustment period, improving control reliability while managing complexity through upfront planning.
Data Source
AI summary
A server controls a vehicle group including a plurality of vehicles configured to be electrically connectable to an external power source. The server includes a selection unit that selects a plurality of target vehicles from among the vehicle group before a start of a predetermined adjustment period, and a charging control unit. The charging control unit controls at least one of the target vehicles such that a total charging power of the power accumulation device included in each of the target vehicles electrically connected to the external power source follows a target value within the adjustment period, and advances a start of charging of a power accumulation device included in a first vehicle of which a charging end time is reserved within the adjustment period from among the target vehicles.