Harmonic Battery Charging Using Impedance-Tuned Waveforms
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Solution Overview
Problem
Conventional battery charging methods, particularly rapid charging, often result in inefficiencies, heat generation, and degradation due to high-frequency harmonics and abrupt charge currents, leading to reduced battery life and capacity.
Innovation Solution
A method and system that alter and optimize battery charging signals by identifying and manipulating harmonic components based on impedance profiles, using harmonic tuning to enhance efficient energy transfer and reduce adverse effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If rapid charging is used, then charging speed is improved, but charging efficiency deteriorates and heat generation increases
Solution Approach 1:
The patent applies dynamics by continuously adjusting the charging frequency based on real-time battery impedance measurements. The system transitions from static charging rates to dynamic frequency modulation, optimizing the charging signal to match the battery's instantaneous state, thereby maintaining high charging speed while improving efficiency
Solution Approach 2:
The patent changes the parameter of charging frequency from fixed to variable. By measuring battery impedance and adjusting the charging frequency accordingly, the system optimizes energy transfer efficiency while maintaining rapid charging capability, resolving the contradiction between speed and efficiency
2Speed
If rapid charging is used, then charging speed is improved, but battery life deteriorates
Solution Approach 1:
The patent implements feedback by continuously measuring battery impedance during charging and using this information to adjust the charging frequency. This closed-loop control prevents excessive current stress on the battery while maintaining rapid charging, thereby extending battery life without sacrificing charging speed
Solution Approach 2:
The system dynamically adjusts charging parameters based on real-time battery state measurements, transitioning from aggressive fixed-rate charging to adaptive charging that responds to battery conditions, thus protecting battery life while maintaining speed
3Duration of action of stationary object
If conventional charging is used, then battery life is preserved, but charging time increases
Solution Approach 1:
The patent changes the charging frequency parameter dynamically during the charging process, starting with higher frequencies for rapid charging and adjusting based on battery state. This allows the system to achieve fast charging initially while protecting the battery through subsequent parameter adjustments, reducing overall charging time without compromising battery life
4Speed
If high current charging is applied, then charging speed is improved, but heat generation increases
Solution Approach 1:
The patent applies periodic action by using AC-based charging with variable frequency instead of continuous DC charging. The periodic nature of the charging signal allows for better heat distribution and reduced peak temperatures while maintaining high average charging power, thus improving speed without excessive heat generation
Data Source
AI summary
Aspects of the present disclosure involve charging or discharging an electrochemical device such as a battery. The system generates a waveform, such as a charge signal, to tune harmonic attributes of the waveform based on the impedance of the battery to a harmonic or harmonics of the waveform. The system may enhance (e.g., add or increase magnitude) or suppress (e.g., delete or reduce magnitude) harmonics of the waveform. Such a harmonically tuned waveform may optimize energy transfer to or from the battery to achieve various possible goals including charging speed, enhancing battery charge capacity and/or enhancing battery cycle life.