Battery Cooling Control via Real-Time Deterioration Feedback
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Solution Overview
Problem
Conventional battery management systems in electric vehicles fail to maintain a desired cooling level for batteries, leading to shortened service life due to variables like storage temperature, driving habits, and charging conditions, even when using a preset cooling fan control mode.
Innovation Solution
A method that adjusts the cooling fan operation based on real-time measured battery temperature and actual durability deterioration rate, switching to a deterioration attenuation mode when the actual deterioration rate exceeds the predicted rate, with multiple attenuation modes to increase cooling fan operation accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling fan operation is controlled based on preset temperature ranges, then battery temperature is maintained within acceptable limits, but battery service life is shortened due to unaccounted deterioration variables
Solution Approach 1:
The system continuously monitors actual battery temperature and compares it with predicted temperature based on deterioration rate. When actual temperature exceeds predicted temperature, the system increases cooling fan operation to compensate for accelerated deterioration, creating a closed-loop feedback control that adapts to real-time battery conditions
Solution Approach 2:
The cooling control system transitions from static preset temperature ranges to dynamic adjustment based on real-time deterioration rate assessment. The control mode automatically switches between normal mode and deterioration attenuation mode, adjusting cooling intensity dynamically according to actual battery degradation state
2Reliability
If cooling fan operation is increased to extend battery service life, then battery temperature is reduced, but energy consumption increases
Solution Approach 1:
The system applies partial cooling action by increasing fan operation only when and where needed - specifically when actual deterioration rate exceeds predicted rate and actual temperature exceeds predicted temperature. This avoids continuous excessive cooling, reducing unnecessary energy consumption while still extending battery service life during critical deterioration periods
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 approach effectively extends the battery service life by maintaining a lower battery temperature, improving durability by about 10% and ensuring the guaranteed distance of battery capacity, as shown in the graphs depicting temperature and travel distance improvements.
Implementation Method 1
a battery and a cooling fan for cooling the battery with air are provided
Data Source
AI summary
Disclosed herein is a cooling control method for a battery management system in a vehicle in which battery cooling is controlled by according to the degree of battery durability deterioration.Specifically, the method of controlling battery cooling using a battery management system (BMS) configured to control a degree of cooling fan operation based on a battery temperature in the vehicle equipped with the battery and the cooling fan, includes the steps of increasing the degree of cooling fan operation compared normal conditions when an actual battery durability deterioration rate (Vt) measured using battery durability deterioration degree information during vehicle operation is higher than a predicted battery durability deterioration rate.