Dual-Battery SOC Integration for Accurate EV Range Estimation
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Solution Overview
Problem
Existing eco-friendly vehicles lack an apparatus to calculate the integrated state-of-charge (SOC) of both the main and auxiliary batteries independently, leading to inaccurate remaining SOC and driving distance information for users.
Innovation Solution
An apparatus that includes a processor and storage medium to receive and calculate the integrated SOC of a main battery and an auxiliary battery, using a computer-readable instruction to integrate their respective SOC values based on their capacities, and provide accurate remaining SOC and driving distance information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate battery management units independently manage main and auxiliary batteries, then each battery can be managed separately, but accurate integrated SOC and driving distance information cannot be provided
Solution Approach 1:
The patent merges the separate main battery management unit and auxiliary battery management unit into an integrated battery management system. The processor receives SOC values from both batteries and calculates an integrated SOC that reflects the combined state of charge of both batteries, providing accurate integrated SOC and driving distance information while maintaining separate battery management capabilities.
2Loss of information
If only main battery SOC is monitored, then management is simple, but accurate remaining driving distance information cannot be provided
Solution Approach 1:
The battery management system performs multiple functions: it monitors the main battery SOC, monitors the auxiliary battery SOC, calculates the integrated SOC combining both batteries, and provides driving distance information based on the integrated SOC. This multi-functional approach ensures accurate driving distance information while managing both battery systems efficiently.
Data Source
AI summary
An embodiment apparatus configured to calculate an integrated state-of-charge (SOC) for a vehicle equipped with a main battery and an auxiliary battery includes one or more processors and a storage device storing a program to be executed by the one or more processors, the program including instructions to receive a SOC of the main battery, receive a SOC of the auxiliary battery, and calculate an integrated SOC of the main battery and the auxiliary battery, based on the SOC of the main battery and the SOC for the auxiliary battery.