ESS Battery Pack Switching for EV Auxiliary Power
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Solution Overview
Problem
Existing energy storage systems (ESS) for electric vehicles are limited in their ability to efficiently utilize power for auxiliary functions like air conditioning, which can reduce the vehicle's driving range and accuracy of predicted range.
Innovation Solution
An ESS management apparatus and system that acquires vehicle usage data and charging state data to select a second battery pack for replacement, optimizing power distribution between the vehicle and the ESS installation site, and utilizing a home ESS battery for air conditioning in electric vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If power is supplied to auxiliary functions (air conditioning) in electric vehicles using the vehicle's main battery, then the auxiliary functions can operate, but the vehicle's driving range is reduced and the predicted range accuracy deteriorates
Solution Approach 1:
The system segments the power supply function by separating auxiliary function power supply from the vehicle's main battery. Instead of using one battery for both driving and auxiliary functions, the invention introduces an external ESS battery pack that specifically supplies power to auxiliary functions, thereby preserving the vehicle's main battery capacity for driving and improving predicted range accuracy.
Solution Approach 2:
The external ESS battery pack acts as an intermediary power source between the power grid and the vehicle's auxiliary functions. This mediator battery pack absorbs the power demand for air conditioning and other auxiliary functions, preventing direct energy withdrawal from the vehicle's main battery and thus maintaining driving range integrity.
2Productivity
If multiple battery packs are managed in the ESS system, then power utilization efficiency can be improved, but the system complexity increases
Solution Approach 1:
The system dynamically selects and switches between multiple battery packs based on real-time conditions such as charge state, usage history, and power demands. The control apparatus continuously monitors battery pack states and automatically determines the optimal battery pack for auxiliary function power supply, adapting to changing conditions without requiring manual intervention or complex reconfiguration.
Solution Approach 2:
The control apparatus autonomously manages the multiple battery packs by automatically selecting the most suitable battery pack for power supply based on predefined criteria and real-time data. The system performs self-assessment of battery pack states and makes independent decisions about power allocation, reducing the need for external control complexity while maintaining high power utilization efficiency.
Data Source
AI summary
An ESS management apparatus disclosed herein includes: a memory; and a processor operatively connected to the memory. The processor is configured to: acquire vehicle usage data from a first battery pack used in a vehicle among multiple battery packs of an energy storage system (ESS); acquire charging state data of remaining battery packs excluding the first battery pack among the multiple battery packs; and select a second battery pack to replace the first battery pack from among the remaining battery packs based on the vehicle usage data and the charging state data.