Battery State Monitoring via Magnetic Susceptibility
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Solution Overview
Problem
Existing battery testing systems are not accurate, particularly for non-new batteries, leading to inaccurate estimates of state of charge and condition.
Innovation Solution
A method and apparatus that measure the state of an electrochemical battery by exposing its electrode to an electromagnetic excitation field, measuring induced magnetism, and determining the battery state based on this magnetism, using a controller to interpret the results and potentially discontinue the excitation field before measuring residual magnetism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electromagnetic excitation field is applied to measure induced magnetism, then measurement precision of battery state is improved, but device complexity increases
Solution Approach 1:
The patent replaces conventional electrical measurement methods with magnetic field-based measurement. By applying an electromagnetic excitation field to the battery electrode and measuring the induced magnetism, the system achieves more accurate battery state monitoring without relying on complex electrical circuit analysis, thereby improving measurement precision while using a different physical domain approach
Solution Approach 2:
The patent utilizes changes in magnetic susceptibility of the battery electrode as a key parameter to determine battery state. By monitoring how the induced magnetism varies with battery charge state and age, the system extracts accurate battery information through parameter changes in the magnetic properties rather than through complex electrical characteristic analysis
2Speed
If electromagnetic excitation field is continuously applied, then measurement speed is improved, but energy consumption increases
Solution Approach 1:
The patent employs periodic application of the electromagnetic excitation field rather than continuous application. The excitation field is applied in pulses or cycles, allowing measurement to be completed during active phases while reducing overall energy consumption during idle phases, thus achieving a balance between measurement speed and energy usage
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
Provides accurate monitoring of battery state, including state of charge, by correlating changes in magnetic susceptibility with chemical changes in the electrodes, improving the reliability of battery health assessments.
Implementation Method 1
exposing an electrode of the electrochemical battery to an electromagnetic excitation field; measuring magnetism induced in the electrode by the electromagnetic excitation field
Implementation Method 2
correlating changes in magnetic susceptibility with chemical changes in the electrodes
Data Source
AI summary
Methods and apparatus for testing electrical storage batteries monitor magnetic susceptibility of components of the storage batteries. In some embodiments, magnetic susceptibility of a plate in a lead-acid battery is determined to provide an indication of the state of charge of the battery.