Battery Resonance Frequency Interval Determination
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Solution Overview
Problem
Determining the resonance frequency of a rechargeable battery is crucial for optimal charging, but existing methods lack precision in identifying the exact frequency or a narrow frequency range within which it lies, leading to inefficient charging processes.
Innovation Solution
A method involving the application of periodic current or voltage signals of different frequencies to a battery cell, measuring the resulting temperatures, and selecting frequency intervals based on temperature comparisons to narrow down the resonance frequency range, utilizing techniques like golden ratio or Fibonacci search to pinpoint the minimum temperature value corresponding to the resonance frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If periodic current or voltage signals of different frequencies are applied to the battery cell to measure temperature responses, then the measurement precision of resonance frequency is improved, but the loss of time increases due to sequential frequency testing
Solution Approach 1:
The frequency spectrum is segmented into multiple frequency intervals, and the method systematically tests each interval to identify where the resonance frequency lies. This segmentation approach allows for structured exploration of the frequency range while maintaining measurement precision.
Solution Approach 2:
The method performs preliminary temperature measurements at different frequencies to identify the frequency interval containing the resonance frequency before conducting more precise measurements. This preliminary action narrows down the search range, reducing the overall time required for accurate resonance frequency identification.
2Productivity
If a narrow frequency interval is used to identify resonance frequency, then the charging efficiency is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The method applies periodic current or voltage signals at different frequencies to the battery cell and measures the temperature responses. By analyzing the temperature variations caused by periodic excitation at different frequencies, the method identifies the resonance frequency interval, thereby improving charging efficiency without excessive measurement complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively identifies a resonance frequency interval by measuring temperature responses to varying frequencies, ensuring more efficient charging by minimizing energy losses and optimizing battery performance.
Implementation Method 1
a cell of a rechargeable battery when applying a periodic current or voltage signal for a specified duration becomes the warmer the more the frequency of the periodic signal deviates from the resonance frequency
Implementation Method 2
Rechargeable batteries have a so-called internal resonance frequency governed by chemical processes in the battery's interior
Data Source
AI summary
Disclosed is a method of determining a resonance frequency interval containing the resonance frequency of a rechargeable battery. The method comprises applying periodic current or voltage signals of different frequencies in succession to a battery cell of the battery. The method also comprises measuring of the temperatures of the battery cell occurring for the different frequencies. In addition, the method comprises comparing of the temperatures, and subsequent selection of an initial frequency of the different frequencies as a first interval value of the resonance frequency interval and a second frequency of the different frequencies as a second interval value of the resonance frequency interval based on the comparison of the temperatures.