Charging Device Efficiency Optimization for EV Battery Thermal Management
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Solution Overview
Problem
Conventional charging methods for electrical energy stores, such as rechargeable batteries, result in increased heating of components due to inefficient energy transfer, leading to complex cooling requirements and accelerated aging, especially in applications like electric vehicles.
Innovation Solution
A method that considers the efficiency characteristics of both the charging device and the electrical energy store to determine optimal charging durations, reducing heating and energy losses by matching charging operations with lower capacity points, allowing for simpler cooling solutions and extended component life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the IU charging method is used to achieve the quickest possible charging operation, then the charging duration is reduced, but the heating of the charging device and electrical energy store increases
Solution Approach 1:
The charging device dynamically adjusts charging parameters based on real-time efficiency characteristics and thermal conditions, transitioning between different charging strategies (quick charging vs. efficient charging) rather than using a fixed IU method throughout the charging process
Solution Approach 2:
The system changes operating parameters (charging current, voltage, power) based on efficiency characteristic families to optimize the trade-off between charging speed and heat generation, selecting optimal points that balance charging duration and temperature increase
2Productivity
If the IU charging method operates at maximum charging capacity, then the charging speed is maximized, but the cooling system complexity increases
Solution Approach 1:
The system uses partial charging capacity when efficiency characteristics indicate lower heat generation, rather than always operating at maximum capacity, thereby reducing cooling requirements while still achieving acceptable charging speeds
Solution Approach 2:
The charging device automatically monitors efficiency characteristics and adjusts its own operating parameters to minimize heat generation, reducing the burden on external cooling systems without requiring complex controlled cooling infrastructure
3Loss of time
If charging is performed with high charging current and voltage, then the charging duration is reduced, but the ageing of the charging device and electrical energy store accelerates
Solution Approach 1:
The system varies charging parameters (current, voltage, power) based on efficiency characteristic families to find optimal operating points that balance charging speed with component stress, avoiding consistently high-parameter operation that accelerates ageing
Solution Approach 2:
The charging device uses feedback from efficiency characteristic monitoring to adjust charging parameters in real-time, preventing excessive stress on components while maintaining acceptable charging speeds, thereby extending component lifespan
Data Source
AI summary
The invention relates to a method for operating a charging device for charging an electric energy storage device from a first charge state to a second charge state. The first charge state is lower than the second charge state, and the charging device is connected to an interface. The charging device communicates with the energy storage device and ascertains the charge state thereof. In an additional step, the charging device obtains the efficiency characteristic field of the electric energy storage device and the efficiency characteristic field of the charging device. The invention relates to a method for operating a charging device for charging an electric energy storage device from a first charge state to a second charge state. The first charge state is lower than the second charge state, and the charging device is connected to an interface. The charging device communicates with the energy storage device and ascertains the charge state thereof. In an additional step, the charging device obtains the efficiency characteristic field of the electric energy storage device and the efficiency characteristic field of the charging device.