EV Charging Control for Minimum Charge Allocation Across Vehicles
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Solution Overview
Problem
When multiple battery electric vehicles are sequentially charged, the charge amount of vehicles to be charged later may be insufficient until the first vehicle reaches a full charge, potentially preventing them from moving to their basic charging point, and some vehicles may require more charge than necessary for basic movement.
Innovation Solution
A control device that acquires the necessary power amount for each electrified vehicle to reach its basic charging point and executes two charging controls: first, to ensure each vehicle reaches a target storage amount based on the necessary power, and second, to further charge the vehicles, thereby increasing their storage capacity while ensuring they have enough charge to reach their basic charging point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple battery electric vehicles are sequentially charged by a charger, then the charging process can be completed for each vehicle, but the charge amount of vehicles to be charged later may be limited until the first vehicle reaches full charge, resulting in insufficient charging
Solution Approach 1:
The charging process is divided into two distinct phases: first charging control that ensures each vehicle reaches a target storage amount based on necessary power for basic movement, and second charging control that provides additional charging capacity. This segmentation allows simultaneous progression of multiple vehicles through phase one while enabling selective advancement of individual vehicles into phase two, thereby preventing charging insufficiency without sacrificing overall charging throughput.
Solution Approach 2:
The system performs preliminary assessment of each vehicle's necessary power amount required to reach its basic charging point before initiating charging. Based on this preliminary information, the control device formulates a charging plan that pre-allocates charging resources to ensure each vehicle receives at least the minimum required charge, while reserving additional capacity for vehicles that need more. This preliminary action prevents the problem of insufficient charging before it occurs.
2Reliability
If the charger charges the first vehicle to full charge before charging subsequent vehicles, then the first vehicle receives adequate charge, but subsequent vehicles may not receive enough charge to reach their basic charging points
Solution Approach 1:
The charging control system dynamically adjusts charging allocation based on real-time vehicle needs and charger capacity. During first charging control, the system dynamically distributes power to multiple vehicles simultaneously to reach their respective target storage amounts. During second charging control, it dynamically prioritizes vehicles that need additional charge, continuously optimizing the charging schedule to minimize waiting time while guaranteeing minimum charge requirements are met for all vehicles.
Solution Approach 2:
The control device continuously monitors the charging status of each vehicle, comparing actual charge levels against the necessary power amounts required to reach basic charging points. This feedback mechanism allows the system to adjust charging allocation in real-time, ensuring that no vehicle falls below its minimum required charge while optimizing overall charging efficiency and reducing waiting times through intelligent resource allocation.
3Adaptability or versatility
If the charger allocates equal charging power to all vehicles simultaneously, then charging fairness is maintained, but vehicles with different power needs may not receive appropriate charge amounts
Solution Approach 1:
The charging system applies local quality by providing different charging treatments to different vehicles based on their specific needs. During first charging control, each vehicle receives charging targeted to reach its individual target storage amount. During second charging control, the system selectively provides additional charging to specific vehicles that require more power, rather than uniformly distributing power to all vehicles. This localized approach allows the system to adapt to varying vehicle requirements while managing control complexity through structured charging phases.
Data Source
AI summary
The server (control device) includes a communication device (acquisition unit) that acquires information about the amount of electric power required to move from EVSE (charger) to each basic point of the plurality of electrified vehicle. The server includes a processor for controlling the charge of each of the plurality of electrified vehicle by EVSE. The processor performs charging control (first charging control) so that the storage amount of each of the plurality of electrified vehicle reaches the necessary power amount, and then performs charging control (second charging control) for charging each of the plurality of electrified vehicle.