Battery Charging Profile Generation via F Mapping and SOC SOH Estimation
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Solution Overview
Problem
Existing battery charging technologies, such as CC/CV and multi-step charging, are unsuitable for fast charging due to prolonged charging times and potential battery degradation, necessitating a method that balances speed with battery life.
Innovation Solution
A battery charging method that measures temperature and estimates state of charge (SOC) and health (SOH), using an F mapping relationship to generate a charging profile with varying C-rates, optimized using genetic algorithms to minimize fitness functions and include rest periods, ensuring efficient charging within desired times while maximizing battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CC/CV charging scheme is used, then charging voltage is maintained at constant level, but charging time becomes relatively large and fast charging is not suitable
Solution Approach 1:
The patent applies dynamics by transitioning from static constant voltage charging to dynamic variable voltage charging. The charging voltage is adjusted in real-time based on the state of charge (SOC) and state of health (SOH) of the battery, allowing the system to optimize charging speed while maintaining safety constraints throughout the charging process.
Solution Approach 2:
The patent changes the charging parameters dynamically by modifying voltage and current levels based on battery conditions. Different charging stages use different voltage and current parameters, with the charging profile adapted according to SOC and SOH measurements, enabling both fast charging and voltage stability.
2Productivity
If multi-step charging scheme or pulse charging scheme is used for fast charging, then charging speed is improved, but battery degradation occurs
Solution Approach 1:
The patent implements feedback mechanisms by continuously monitoring battery temperature, voltage, and current during charging. Based on this feedback, the system adjusts charging parameters in real-time, reducing current when temperature rises or when approaching full charge, thereby preventing battery degradation while maintaining fast charging capability.
Solution Approach 2:
The charging scheme dynamically adjusts current and voltage levels based on real-time battery conditions rather than using fixed multi-step or pulse patterns. The system transitions smoothly between charging stages based on SOC and SOH, optimizing the balance between charging speed and battery protection.
3Loss of time
If high C-rate charging is applied to achieve fast charging, then charging time is reduced, but battery temperature increases and battery life decreases
Solution Approach 1:
The patent employs periodic action by implementing rest periods during fast charging. The charging process includes intermittent pauses where charging is temporarily suspended, allowing battery temperature to stabilize and preventing excessive heat accumulation while still achieving overall fast charging objectives.
Solution Approach 2:
The system dynamically adjusts C-rate based on real-time temperature monitoring. When battery temperature approaches threshold levels, the charging current is automatically reduced or paused, preventing thermal runaway while maintaining high charging speeds during safe operating conditions.
4Loss of time
If high C-rate charging is applied to achieve fast charging, then charging time is reduced, but battery degradation occurs
Solution Approach 1:
The patent applies preliminary action by performing health assessments and temperature checks before initiating fast charging. The system evaluates battery SOH and establishes safe operating parameters in advance, preventing degradation-causing conditions from developing during the charging process.
Solution Approach 2:
Continuous feedback monitoring of battery conditions during charging allows the system to detect early signs of stress or degradation and adjust parameters accordingly. This real-time adaptation protects battery life while maintaining fast charging performance throughout the charging cycle.
Data Source
AI summary
Provided are a battery charging method, a battery charging information generating method, and a battery charging apparatus. The battery charging apparatus may measure a temperature of a battery, may estimate a state of charge (SOC) and a state of health (SOH) of the battery, may acquire an F mapping relationship that maps F values to C-rates and SOCs at the temperature and the SOH, the F value denoting a ratio of variation of SOC to variation of voltage, and may generate a charging profile that is a sequence of charging C-rates for each of the SOCs for charging the battery based on the estimated SOC and the F mapping relationship.