Adaptive Battery Temperature Limits Based on Degradation Speed
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Solution Overview
Problem
Conventional battery energy storage systems using natural cooling methods face challenges in maintaining system performance and utilization rate over time due to constant upper limit temperature settings, which do not account for battery degradation.
Innovation Solution
A battery management apparatus that calculates the degradation degree and speed of the battery, and adjusts the upper limit temperature accordingly, allowing for a stepwise increase in temperature as the degradation speed decreases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the upper limit temperature of the battery is set to a constant value over the entire usage period, then the battery temperature control is simple, but the system performance degrades as the battery ages due to increased internal resistance
Solution Approach 1:
The patent applies the dynamics principle by transitioning from a static constant upper limit temperature to a dynamic adaptive upper limit temperature that changes based on battery degradation state. The control device calculates the battery's degradation degree and adjusts the upper limit temperature accordingly, allowing the temperature parameter to evolve with the battery's aging process. This resolves the contradiction by making the temperature control system adaptive rather than fixed, maintaining optimal performance throughout the battery's lifecycle while managing complexity through automated calculations.
Solution Approach 2:
The patent implements parameter changes by modifying the upper limit temperature parameter based on the battery's degradation state. Instead of keeping the temperature parameter constant, the system dynamically adjusts this parameter as the battery ages and internal resistance increases. This allows the temperature control to adapt to changing battery characteristics, preventing performance degradation while managing the complexity through parameter evolution rather than structural complexity.
2Productivity
If the upper limit temperature is increased to maintain performance in degraded batteries, then the charging-discharging current capacity improves, but the risk of thermal damage increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the upper limit temperature parameter based on the battery's degradation state. As the battery degrades and internal resistance increases, the system calculates an appropriate temperature increase to maintain acceptable performance. This resolves the contradiction by making the temperature parameter adaptive - it increases only when and by how much is necessary to maintain performance, rather than using a fixed high or low temperature setting.
Solution Approach 2:
The patent implements feedback by continuously monitoring the battery's degradation state and using this information to adjust the upper limit temperature. The control device calculates degradation based on battery characteristics and operational history, then feeds this information back into the temperature control decision-making process. This closed-loop approach ensures the temperature is increased only when degradation warrants it, balancing performance maintenance with thermal safety.
3Productivity
If the upper limit temperature is adjusted based on degradation degree, then the system utilization rate improves over time, but the control system complexity increases
Solution Approach 1:
The patent applies self-service by enabling the control device to automatically calculate the battery's degradation state and determine the appropriate upper limit temperature adjustments without external intervention. The system monitors its own operational parameters, calculates degradation based on internal resistance changes and operational history, and autonomously adjusts the temperature parameter. This resolves the contradiction by making the control system self-managing, improving utilization through adaptive control while containing complexity through automation rather than manual management.
Solution Approach 2:
The patent implements feedback loops where the control device continuously monitors battery parameters, calculates degradation state, and uses this feedback to adjust the upper limit temperature. This closed-loop control system automatically adapts to battery aging, improving system utilization over time. The feedback mechanism manages complexity by using automated calculations and decision algorithms rather than requiring complex manual control procedures or external systems.
Data Source
AI summary
A battery management apparatus for managing a chargeable-dischargeable battery includes: a battery status calculation unit that calculates a degradation degree of the battery; a degradation speed calculation unit that calculates a degradation speed of the battery on the basis of the degradation degree; and an upper limit temperature setting unit that sets an upper limit temperature of the battery on the basis of the degradation speed, wherein the upper limit temperature setting unit raises the upper limit temperature in association with a decrease of the degradation speed.