EV Battery Charging Management via Travel Data
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Solution Overview
Problem
The high cost and short lifespan of batteries in two-wheeled electric vehicles lead to frequent replacements, increasing the overall cost of ownership due to inefficient charging practices.
Innovation Solution
A method and apparatus for charging management that estimates the depth of discharge and degree of ageing of a battery using travel data to determine an optimal state of charge range, allowing for optimized charging to prolong battery life by minimizing ageing through intelligent charging schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the battery is charged to high SOC frequently, then the available energy for travel is improved, but the battery ageing is accelerated and lifespan is reduced
Solution Approach 1:
The patent applies dynamics by making the charging target SOC dynamic rather than fixed. The system adjusts the target SOC based on estimated future travel energy requirements, allowing the charging strategy to adapt to varying usage patterns. This resolves the contradiction by charging to higher SOC only when future energy needs justify it, rather than always charging to maximum SOC.
Solution Approach 2:
The patent applies preliminary action by estimating future travel energy requirements before charging occurs. The system uses travel data from previous days to predict upcoming energy needs, then determines the optimal target SOC in advance. This allows the system to prepare the battery at the right charge level before it is needed, avoiding both overcharging and unnecessary charging cycles.
2Duration of action of stationary object
If the battery is charged to low SOC to reduce ageing, then the battery lifespan is prolonged, but the energy availability for travel is insufficient
Solution Approach 1:
The patent applies feedback by using actual travel data from previous days to continuously refine predictions of future energy requirements. The system monitors real usage patterns and adjusts the target SOC determination accordingly. This feedback loop ensures that energy availability is optimized based on actual needs rather than fixed assumptions, preventing both energy shortages and unnecessary charging.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the target SOC parameter based on predicted energy requirements. Instead of using a fixed charging threshold, the system modifies the target SOC parameter according to travel patterns, ensuring sufficient energy availability while minimizing unnecessary charging to high SOC levels that accelerate ageing.
3Ease of operation
If simple charging strategies are used, then the ease of operation is improved, but the battery ageing is not minimized and replacement frequency increases
Solution Approach 1:
The patent applies self-service by enabling the charging system to automatically determine optimal charging parameters without user intervention. The system autonomously analyzes travel data, predicts energy requirements, and sets the target SOC automatically. This resolves the contradiction by providing intelligent battery management that extends lifespan without requiring users to understand or configure complex charging parameters.
Data Source
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AI summary
The present invention relates to a method and apparatus for charging management, the method comprising: using travel data of an electric vehicle of a current day to estimate a possible depth of discharge (DOD) of a battery supplying power to the electric vehicle on a second day, and a degree of ageing of the battery as of the current day, wherein the travel data indicates the variation with time of a travel speed of the electric vehicle on the current day; determining an optimal state of charge (SOC) range of the battery corresponding to the estimated degree of ageing, on the basis of information indicating optimal SOC ranges of the battery corresponding to different degrees of ageing of the battery; determining a maximum SOC of the battery when used on the second day, on the basis of the estimated possible DOD and the determined optimal SOC range; and charging the battery to the maximum SOC, when the battery can be charged for use on the second day. The method and apparatus can prolong the life of the battery supplying power to the electric vehicle.