Battery Cell Temperature Control to Prevent Charge Imbalance
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Solution Overview
Problem
Temperature imbalances among battery cells in a battery assembly lead to performance degradation and accelerated deterioration, particularly when cells operate in different temperature environments due to varying seating positions, and trickle charging exacerbates these issues.
Innovation Solution
A battery control system comprising temperature measuring devices and a controller that monitor temperature differences between specific battery cells and perform control operations, such as adjusting full charge voltage and blocking trickle charge, to prevent state degradation. The controller measures temperatures at distinct points within the battery assembly and executes predefined operations based on predefined conditions to mitigate temperature imbalances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If battery cells are operated in different temperature environments due to varying seating positions, then the battery assembly can be designed with flexible cell arrangements, but temperature imbalance occurs leading to performance degradation and accelerated deterioration
Solution Approach 1:
The patent applies local quality by implementing temperature-specific control strategies for different battery cells based on their individual temperature conditions. The controller monitors temperature of each cell and applies different charging parameters (such as different charging currents or voltage limits) to cells at different temperatures, thereby addressing the temperature imbalance problem while maintaining flexible cell arrangements.
2Ease of operation
If trickle charging is applied to fully charged battery cells, then the system can maintain charge levels and compensate for current consumption, but performance degradation and deterioration are accelerated particularly in high-temperature environments
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting charging parameters based on temperature conditions. When a battery cell is fully charged and处于 high temperature, the controller stops or reduces trickle charging current to prevent accelerated deterioration. The system monitors both charge state and temperature, and modifies charging parameters accordingly - allowing trickle charge when appropriate but preventing it when temperature is high, thus extending battery lifespan while maintaining charge maintenance capability.
Data Source
AI summary
A battery control system may comprise: a temperature measuring device for measuring a temperature of a first battery cell disposed at a first point among a plurality of battery cells included in a battery assembly and a temperature of a second battery cell disposed at a second point among the plurality of battery cells, wherein the second point being spaced apart from the first point; and a controller for monitoring the temperature of the first battery cell and the temperature of the second battery cell and performing a predefined control operation for preventing state degradation due to temperature imbalance among the battery cells based on at least one of the temperature of the first battery cell and the temperature of the second battery cell.