Battery EIS Measurement Using Charging Apparatus
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery monitoring technologies lack a simple and low-cost method for measuring electrochemical impedance spectrum (EIS), which is crucial for determining the state of charge (SOC), state of health (SOH), and internal temperature, as specialized monitoring apparatuses are complex and costly.
Innovation Solution
An electrochemical impedance spectrum measurement method that utilizes an excitation signal input by a charging apparatus to measure the EIS of a battery, acquiring current and voltage values to determine the impedance spectrum without requiring a separate detection apparatus, thereby reducing costs and maintaining operational simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a specialized monitoring apparatus is used to measure EIS, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The charging apparatus is designed to perform both charging function and EIS measurement function using existing hardware components. The control module executes different measurement protocols (charging curves and EIS curves) based on the same charging circuitry, eliminating the need for separate specialized monitoring apparatus while maintaining measurement accuracy
Solution Approach 2:
The charging apparatus uses its own built-in charging circuitry and control module to perform EIS measurements on the battery without requiring external specialized equipment. The system leverages its inherent capabilities to conduct impedance spectrum measurements, thereby reducing device complexity and cost
2Measurement precision
If a specialized monitoring apparatus is used to measure EIS, then measurement precision is improved, but cost increases
Solution Approach 1:
The charging apparatus integrates EIS measurement capability into its existing charging functionality, allowing a single device to serve multiple purposes. This eliminates the need to manufacture separate specialized monitoring apparatus, thereby reducing overall system cost while maintaining measurement precision through protocol-based differentiation
Solution Approach 2:
The patent combines the EIS measurement function with the charging function in a single integrated system. By merging these two functions into one apparatus and using the same hardware resources for both purposes, the manufacturing cost is reduced compared to having separate specialized devices
3Measurement precision
If separate detection apparatus is configured for battery, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The charging apparatus serves dual purposes: charging the battery and measuring EIS characteristics. The control module differentiates between charging operations and measurement operations through protocol selection, enabling the same hardware to perform both functions without requiring separate detection apparatus
Solution Approach 2:
The control module acts as an intermediary that manages both charging and measurement functions. By using software-based protocol differentiation and control logic, the system achieves precise EIS measurement without adding physical detection hardware, thereby reducing system 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 allows for accurate determination of battery state, enabling precise charging policy adjustments and state information output, while eliminating the need for additional hardware, thus being highly practical for actual applications.
Implementation Method 1
inputting an excitation signal to a first battery in an electric apparatus, where the excitation signal is used to measure an electrochemical impedance spectrum of the first battery
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
This application provides an electrochemical impedance spectrum measurement method, system, and apparatus, and a readable storage medium. The method includes: inputting an excitation signal used for measuring EIS to a battery in an electric apparatus, acquiring a current value sequence and a voltage value sequence of the battery during a process of inputting the excitation signal to the battery, and determining the electrochemical impedance spectrum of the battery based on the current value sequence and the voltage value sequence. This method does not require configuration of a separate detection apparatus for batteries, which can reduce the EIS measurement cost while maintaining operational simplicity, making it highly practical for actual applications.