Battery Cell Damage Prediction Using Voltage-Temperature Weighting
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Solution Overview
Problem
There is no effective method to prevent or accurately predict damage to secondary battery cells when their voltage or temperature exceeds a safety range, leading to variable and unpredictable cell damage.
Innovation Solution
An apparatus and method that include a battery module with voltage and temperature sensors, a contactor for disconnecting the module, and a processor to calculate a weighting for damage prediction based on voltage and temperature deviations from a safety range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage or temperature monitoring is implemented, then damage prediction capability is improved, but device complexity increases
Solution Approach 1:
The patent segments the damage prediction function into modular components: voltage sensors, temperature sensors, processors for calculating weighting values, and contactors for disconnection. This modular segmentation allows each component to perform a specific function, improving overall reliability while making the system easier to implement and maintain despite the increased complexity.
Solution Approach 2:
The patent introduces a processor as an intermediary that calculates weighting values based on voltage and temperature deviations. This intermediary component processes sensor data and determines when disconnection is necessary, enabling accurate damage prediction without requiring direct complex interactions between sensors and control mechanisms.
2Reliability
If real-time monitoring and disconnection control are added, then battery safety is improved, but manufacturing cost increases
Solution Approach 1:
The patent implements preliminary action by establishing predetermined disconnection criteria based on weighting value thresholds before actual damage occurs. The system proactively monitors voltage and temperature deviations, calculates weighting values in real-time, and automatically disconnects when thresholds are exceeded, preventing damage before it happens rather than responding after failure.
Solution Approach 2:
The patent uses parameter changes by monitoring voltage and temperature parameters and their deviations from normal ranges. The processor calculates weighting values based on these parameter changes, and when cumulative weighting exceeds a threshold, disconnection is triggered. This approach converts physical parameter monitoring into a controllable decision-making process.
3Measurement precision
If weighting calculation based on voltage and temperature deviations is implemented, then damage prediction precision is improved, but computational requirements increase
Solution Approach 1:
The patent transforms complex damage assessment into a simplified weighting calculation based on voltage and temperature parameter deviations. Instead of analyzing multiple complex factors, the system focuses on changing parameters (voltage deviation, temperature deviation) and assigns weighting values proportional to these changes, achieving precise damage prediction with reduced computational requirements.
Data Source
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AI summary
The present disclosure relates to an apparatus and method for predicting damage to a battery cell. The technical object to be solved by the present disclosure is to provide a method of managing a battery cell by accurately predicting a degree of damage to the battery cell based on a degree and time of a voltage or a temperature exceeding a safety range. To this end, an apparatus for predicting damage to a battery cell according to the present disclosure includes a battery module including a plurality of battery cells, a voltage sensor configured to measure a voltage of the battery cell, a temperature sensor configured to measure a temperature of the battery cell, a contactor configured to connect or disconnect the battery module, and a processor configured to, when at least one of the voltage and the temperature is included in a cell damage range for the battery cell, control the contactor to disconnect the battery module and calculate a weighting for a degree of damage to the battery cell according to at least one of the voltage and the temperature.