Battery State Diagnosis Using Voltage and Resistance Patterns
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery technologies face challenges in accurately and quickly diagnosing the state of batteries to prevent lithium precipitation, electrolyte side reactions, and positive electrode deterioration, which can lead to battery deterioration, safety risks, and reduced lifespan.
Innovation Solution
An apparatus and method that diagnoses the state of a battery by measuring target voltage and resistance patterns, using a control unit to analyze voltage increase/decrease and resistance increase/decrease patterns based on stored profiles, and classifying the state into electrolyte side reaction, lithium precipitation, positive electrode deterioration, or negative electrode stabilization states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional battery state monitoring methods are used, then the system structure remains simple, but the diagnosis accuracy and speed are insufficient to detect lithium precipitation and electrode deterioration
Solution Approach 1:
The patent segments the battery state diagnosis into multiple independent measurement components: voltage measurement at first reference voltage, resistance measurement at second reference voltage, and separate pattern recognition for voltage and resistance. This segmentation allows each component to be optimized independently while maintaining overall system manageability
Solution Approach 2:
The patent introduces reference voltage levels as intermediary measurement points. By measuring voltage and resistance at specific reference voltages (first and second reference voltages), the system creates intermediate states that reveal battery health information without requiring extreme or dangerous test conditions
2Measurement precision
If comprehensive battery state monitoring is implemented to detect all degradation modes, then diagnosis accuracy improves, but the response time and speed of detection are reduced
Solution Approach 1:
The patent performs preliminary measurements of voltage and resistance at reference voltages during normal battery operation. These preliminary actions capture baseline data that can be quickly compared against stored patterns to detect degradation modes without requiring time-consuming comprehensive tests
Solution Approach 2:
The patent changes measurement parameters dynamically by selecting different reference voltages based on battery state. By adjusting the reference voltage levels and measuring corresponding voltage and resistance values, the system achieves comprehensive diagnosis coverage with rapid response at each operating point
3Reliability
If multiple measurement parameters (voltage and resistance at different reference voltages) are used to diagnose battery state, then diagnosis comprehensiveness improves, but the complexity of data processing and pattern recognition increases
Solution Approach 1:
The patent creates simplified copies of battery behavior by storing reference voltage-resistance patterns for different degradation modes. Instead of complex real-time analysis, the system compares current measurements against pre-stored pattern copies, dramatically reducing processing complexity while maintaining diagnostic reliability
Solution Approach 2:
The patent transforms multiple measurement parameters into a standardized comparison format by changing the reference voltage parameter systematically. This parameter transformation allows different voltage-resistance measurement combinations to be compared against unified reference patterns, simplifying the data processing architecture
Data Source
AI summary
An apparatus for diagnosing a state of a battery includes a voltage measuring unit configured to measure a voltage of a battery and measure a target voltage for the battery when the measured voltage reaches a preset first reference voltage, a resistance measuring unit configured to measure a target resistance of the battery when the measured voltage reaches a preset second reference voltage, and a control unit configured to determine a voltage increase/decrease pattern for the target voltage based on a voltage profile in which the target voltage is stored, determine a resistance increase/decrease pattern for the target resistance based on a resistance profile in which the target resistance is stored, and diagnose a state of the battery from the voltage increase/decrease pattern and the resistance increase/decrease pattern according to a preset diagnostic rule.