Battery Electrode Profile Matching for Fast State Diagnosis
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Solution Overview
Problem
Existing secondary battery diagnosis techniques are inefficient and inaccurate, with a focus on the secondary battery, and there is a need for a more efficient and accurate method to diagnose the state of a secondary battery using charge and discharge signals.
Innovation Solution
A secondary battery diagnosing apparatus and method that uses a memory unit to store positive and negative electrode reference profiles, a voltage measuring unit to measure battery voltage, and a processor to generate and compare profiles to determine adjustment profiles, allowing for accurate diagnosis without disassembly or complex calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electrochemical reactions and transport phenomena are considered for battery simulation, then simulation accuracy is improved, but computational complexity and time increase significantly
Solution Approach 1:
The battery model is segmented into distinct electrochemical reaction components and transport phenomena components. Each segment is simulated separately with appropriate simplifications, allowing accurate representation of critical processes while reducing overall computational burden compared to a fully coupled complex model.
Solution Approach 2:
The simulation dynamically adjusts parameter detail levels based on operating conditions. During normal operation, simplified parameters are used for speed; during critical states like fast charging or degradation events, more detailed electrochemical parameters are activated to improve accuracy when needed most.
2Measurement precision
If detailed electrochemical reactions are simulated, then diagnosis accuracy is improved, but processing time increases
Solution Approach 1:
Reference profiles for electrochemical reactions and transport phenomena are pre-calculated and stored during offline battery testing. During online diagnosis, these pre-computed reference data are retrieved and matched against actual battery behavior, enabling rapid accurate diagnosis without performing complex real-time simulations of all electrochemical processes.
Solution Approach 2:
The system performs partial simulation of electrochemical reactions only for the most critical and informative processes relevant to the specific diagnostic task. Not all electrochemical reactions are simulated in full detail simultaneously; only those necessary for the current diagnostic objective are activated, reducing processing time while maintaining diagnosis accuracy.
Data Source
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AI summary
Disclosed is a secondary battery diagnosing technology capable of effectively diagnosing a state of a secondary battery using a charge and discharge signal of the secondary battery. The secondary battery diagnosing apparatus includes a memory unit configured to store a positive electrode reference profile and a negative electrode reference profile for charge or discharge of a reference battery; a voltage measuring unit configured to measure a voltage of a target battery during a charge or discharge process; and a processor configured to generate a charge and discharge measurement profile based on the voltage measured by the voltage measuring unit, compare a simulation profile obtained from the positive electrode reference profile and the negative electrode reference profile stored in the memory unit with the generated charge and discharge measurement profile, and determine a positive electrode adjustment profile and a negative electrode adjustment profile so that an error between the simulation profile and the charge and discharge measurement profile is within a predetermined level.