EV Battery Grouping by SOC and SOH for Grid Power Dispatch
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Solution Overview
Problem
Existing systems fail to efficiently manage and optimize the use of electric vehicle batteries as distributed energy resources, particularly in balancing electric power demand and supply while minimizing battery deterioration.
Innovation Solution
A system and method that utilizes electric vehicle batteries for energy management by categorizing vehicles based on State Of Charge (SOC) and State Of Health (SOH) to prioritize their use for either operation or power delivery, adjusting departure and return times to optimize electric power demand, and controlling charge and discharge to minimize battery deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If electric vehicle batteries are utilized for power delivery to balance electric power demand and supply, then energy utilization efficiency is improved, but battery deterioration accelerates
Solution Approach 1:
The system performs preliminary classification of vehicles into first group (higher SOC) and second group (lower SOC) before power delivery operations. This advance categorization enables strategic management of battery usage, where vehicles in the first group can provide power delivery while vehicles in the second group are protected from further discharge that would accelerate deterioration. The preliminary grouping action resolves the contradiction by pre-establishing which batteries are suitable for power delivery versus which should be preserved.
Solution Approach 2:
The patent segments the vehicle fleet into distinct groups based on SOC thresholds. By dividing the homogeneous fleet into heterogeneous groups (first group with higher SOC, second group with lower SOC), the system can apply different operational strategies to each segment. This segmentation allows simultaneous optimization of power delivery (using first group vehicles) and battery preservation (protecting second group vehicles), thereby resolving the contradiction between energy utilization and battery life.
2Productivity
If vehicles are prioritized for operation based on battery status, then operational efficiency is improved, but vehicle availability for power delivery decreases
Solution Approach 1:
The system dynamically adjusts vehicle allocation between operation and power delivery based on real-time SOC conditions. Vehicles can transition between different operational roles depending on their charge status and system needs. This dynamic flexibility allows the fleet to maximize operational efficiency when vehicles are needed for transport, while simultaneously maintaining adaptability to provide power delivery when energy balancing is required, thus resolving the contradiction between operational efficiency and vehicle availability.
Solution Approach 2:
The patent utilizes SOC (State of Charge) as a dynamic parameter to determine vehicle assignment. By monitoring and responding to changes in battery charge levels, the system can flexibly reassign vehicles between operational duties and power delivery roles. When SOC is high, vehicles are available for power delivery; when SOC is low, they are prioritized for operation. This parameter-based dynamic allocation resolves the contradiction by allowing the system to optimize for either operational efficiency or power delivery availability based on current conditions.
Data Source
AI summary
A system includes a management module which manages a plurality of vehicles by categorization into a plurality of groups based on combinations of deterioration levels and states of charge of a plurality of batteries included in the plurality of vehicles, and a selection module which selects, based on electric power supply/demand information in an electric power grid, a vehicle in which a battery is to be used for an electric power delivery. A method includes steps of acquiring information representing deterioration levels and states of charge of a plurality of batteries included in a plurality of vehicles, managing the plurality of vehicles by categorization into a plurality of groups based on combinations of the deterioration levels and the states of charge, and selecting, based on electric power supply/demand information in an electric power grid, a vehicle in which a battery is to be used for an electric power delivery.