Vehicle Charging Control for Trip-Based Target State of Charge
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Solution Overview
Problem
Electric vehicles with rechargeable energy storage devices face challenges in maintaining sufficient energy levels for planned trips, leading to delays and potential interference with other vehicles, especially in cyclic operations where timely charging is crucial.
Innovation Solution
A control system that determines a target storage amount of electrical energy for vehicles during charging operations based on performance targets, efficiently distributing received energy between the energy storage device and vehicle loads to ensure sufficient power for planned trips, using off-board power sources and advanced power electronics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the vehicle charges the energy storage device to full capacity, then the vehicle can complete longer trips, but the charging time increases and fleet throughput decreases
Solution Approach 1:
The system charges the energy storage device to a target state of charge that is less than 100% capacity, determined by the specific trip requirements. This partial charging action reduces charging time while providing sufficient energy for the planned trip, avoiding the excessive charging time associated with full capacity charging.
Solution Approach 2:
The system determines the target state of charge in advance based on trip parameters before actual charging begins. This preliminary planning allows the vehicle to charge only the necessary amount of energy needed for the specific trip ahead of time, optimizing charging duration and fleet throughput.
2Productivity
If the vehicle charges quickly to maintain schedule, then trip delays are reduced, but the energy storage device may not receive sufficient energy for the planned trip
Solution Approach 1:
The system continuously monitors the state of charge during charging and compares it against the target state of charge determined from trip requirements. This feedback mechanism ensures that charging stops at the precise moment when sufficient energy is stored, maintaining both fleet throughput and energy sufficiency reliability.
Solution Approach 2:
The target state of charge is dynamically adjusted based on real-time trip parameters, vehicle conditions, and charging rate capabilities. This dynamic optimization allows the system to achieve the minimum necessary energy storage for reliable trip completion while minimizing charging time to maintain fleet throughput.
3Use of energy by moving object
If the vehicle stops to charge during cyclic operations, then energy levels are restored, but the vehicle obstructs the route and interferes with other vehicles
Solution Approach 1:
The system determines the target state of charge and initiates charging before the vehicle needs to leave the charging location. By planning and executing charging in advance based on trip requirements, the vehicle restores energy levels efficiently without unnecessary delays that would cause route obstruction and interference with other vehicles in the fleet.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables electric vehicles to perform planned trips without unnecessary delays, improves fleet throughput by reducing vehicle backups, and optimizes energy usage, ensuring vehicles can complete cyclical missions efficiently.
Implementation Method 1
an energy storage device onboard a vehicle during a charge operation in which the vehicle receives the electrical energy from an off-board power source
Implementation Method 2
The controller may control power electronics onboard the vehicle to distribute the electrical energy received during the charge operation between the energy storage device and one or more loads of the vehicle
Data Source
AI summary
A control system and method determine a target storage amount of electrical energy to store in an energy storage device onboard a vehicle during a charge operation in which the vehicle receives the electrical energy from an off-board power source. The control system and method determine the target storage amount based at least in part on a performance target for a planned trip of the vehicle. The control system and method control power electronics onboard the vehicle to distribute the electrical energy received during the charge operation between the energy storage device and one or more loads of the vehicle so that the energy storage device receives the target storage amount of electrical energy.