Battery Management Apparatus Predicts Voltage Limit Time
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Solution Overview
Problem
Existing battery management systems struggle to predict the time required for a battery's voltage to reach critical limits during charging and discharging, leading to potential overcharge or overdischarge risks, and fail to adjust output parameters accordingly.
Innovation Solution
A battery management apparatus and method that includes a voltage measuring unit, current measuring unit, and control unit to determine the state of charge and predict the remaining time for the battery's voltage to reach discharge or charge limits, using equations based on measured currents and resistance change ratios to adjust output parameters and prevent voltage extremes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery voltage is monitored continuously to detect rapid changes near voltage limits, then the reliability of preventing overcharge or overdischarge is improved, but the complexity of the monitoring system increases
Solution Approach 1:
The system performs preliminary action by predicting the remaining time to voltage limits before the battery actually reaches critical voltage levels. The prediction unit calculates how long until the battery will reach overcharge or overdischarge thresholds based on current voltage change rates, allowing the control system to take preventive action in advance by adjusting output parameters or notifying users, rather than merely reacting when limits are approached
Solution Approach 2:
The prediction unit acts as an intermediary between the voltage monitoring system and the control system. Instead of directly controlling based on raw voltage measurements, the prediction unit processes the voltage change data, calculates remaining time to limits, and provides this processed information to the control unit, which then makes informed decisions about parameter adjustment
2Reliability
If the output parameter is adjusted in real-time based on predicted remaining time, then the reliability of preventing voltage extremes is improved, but the complexity of the control system increases
Solution Approach 1:
The system implements feedback by continuously monitoring the actual battery voltage and comparing it against the predicted voltage trajectory. The prediction unit provides forecasted remaining time to voltage limits, and the control unit uses this feedback to dynamically adjust output parameters. The system also monitors whether the actual voltage follows the predicted path and can recalculate predictions if conditions change, creating a closed-loop control system that adapts to real-time battery behavior
Solution Approach 2:
The control system dynamically adjusts output parameters based on the predicted remaining time to voltage limits. Instead of using fixed threshold-based control, the system modifies its control strategy in real-time according to the calculated prediction, making the control approach adaptive and flexible rather than static
3Productivity
If the battery management system predicts remaining time to voltage limits and adjusts output parameters, then the productivity of battery utilization is improved, but the computational complexity increases
Solution Approach 1:
The system applies partial action by focusing prediction calculations only on the critical phase when voltage changes rapidly near the limits, rather than continuously calculating throughout the entire charge/discharge cycle. The prediction unit activates primarily when voltage approaches regions where rapid changes are expected, reducing unnecessary computational overhead during stable voltage periods while still providing adequate protection
Data Source
AI summary
Disclosed is a battery management apparatus and method. The battery management apparatus according to an embodiment of the present disclosure may be configured to, when the voltage of a battery being discharged is equal to or lower than a preset discharge threshold voltage, predict the time left for a lower limit of discharge voltage preset lower than the discharge threshold voltage from the current time, and maintain or adjust the output parameter of the battery based on the predicted remaining time.