Battery Charging Control via Temperature Prediction
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Solution Overview
Problem
Existing battery charging systems face challenges in efficiently managing temperature during rapid charging, as they often restrict charging to prevent battery degradation, leading to prolonged charging times and potential incomplete charging.
Innovation Solution
A charging control system that predicts temperature changes in the battery and allows temporary exceeding of the upper-limit temperature control value when the influence is within a safe threshold, optimizing charge current to minimize degradation and shorten charging time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If charging current is increased to shorten charging time, then productivity is improved, but temperature increases causing battery degradation
Solution Approach 1:
The system performs preliminary temperature prediction before charging begins and during charging phases. The prediction unit calculates future temperature changes based on current battery state and charging conditions, allowing the control unit to proactively adjust charging current to prevent excessive temperature rise while maximizing charging speed.
Solution Approach 2:
The charging current is dynamically adjusted based on real-time temperature predictions and actual battery conditions. The control unit continuously modifies the charging current magnitude according to the predicted temperature change, creating an adaptive charging process that optimizes both speed and thermal management.
2Reliability
If charging is restricted to prevent temperature increase, then reliability is improved, but charging time increases
Solution Approach 1:
The system allows temporary excessive charging current that would normally be restricted, based on predicted temperature changes. When the prediction indicates temperature will remain within safe thresholds, the control unit permits higher charging currents than conventional systems would allow, thereby reducing charging time while maintaining safety through continuous prediction-based monitoring.
Solution Approach 2:
The system implements a feedback loop where actual temperature measurements are continuously compared with predicted temperatures. This feedback allows the control unit to refine charging current adjustments in real-time, ensuring reliability while optimizing charging speed based on actual battery response to charging.
3Duration of action of stationary object
If charging is terminated at upper-limit temperature to prevent degradation, then battery lifespan is improved, but charging completeness deteriorates
Solution Approach 1:
The prediction unit calculates whether allowing charging to proceed beyond the conventional upper-limit temperature threshold will result in acceptable temperature increases. Based on this preliminary assessment, the control unit can permit charging to continue at higher temperatures temporarily, ensuring complete charging while minimizing degradation through controlled, predicted temperature excursions.
Solution Approach 2:
The system dynamically changes the temperature threshold parameter based on real-time conditions and predictions. Instead of using a fixed upper-limit temperature threshold, the control unit adjusts the effective threshold based on predicted temperature changes, battery state of charge, and environmental conditions, allowing flexible optimization of both lifespan and charging completion.
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 enables faster battery charging while minimizing degradation, preventing premature termination due to temperature restrictions and ensuring safe operation.
Implementation Method 1
the battery temperature prediction unit predicts a change in battery temperature over time
Implementation Method 2
predicts a change in battery temperature over time in the case of continuously charging the battery at the charge current instructed by the charge current instruction unit
Data Source
AI summary
A charging control apparatus includes: a prediction unit configured to predict a change in temperature of a battery over time during charging; a calculation unit configured to calculate, based on the change in temperature over time predicted by the prediction unit, a degree of influence that the battery receives from the temperature of the battery exceeding a predetermined upper-limit temperature control value; and a charging control unit configured to allow the temperature of the battery to exceed the upper-limit temperature and charge the battery when the degree of influence is less than a predetermined reference value.