Battery Power Limit Control Using Real-Time Cell Voltage
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Solution Overview
Problem
Conventional methods for setting the maximum output limit of a battery pack rely on pre-stored tables of temperature and voltage, which are inefficient and require additional storage, and do not allow for real-time adjustments based on current cell voltages.
Innovation Solution
A method that sets the maximum output limit of a battery pack in real-time by monitoring the maximum and minimum voltages of battery cells connected in series or parallel, reducing the charging or discharging power limit when these voltages exceed or fall below predetermined thresholds, without the need for additional tables or direct temperature measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods use pre-stored tables of temperature and voltage to set maximum output limit, then the power limit can be determined, but additional storage is required and real-time adjustments based on current cell voltages are not possible
Solution Approach 1:
The patent extracts the power limit determination logic from pre-stored tables and implements it through real-time voltage monitoring and comparison. Instead of relying on external storage tables, the system directly calculates power limits based on current cell voltages, eliminating the need for additional storage while maintaining reliability.
Solution Approach 2:
The battery management system uses its own voltage monitoring capabilities to dynamically determine power limits without requiring external lookup tables. The system serves itself by utilizing real-time voltage data from the battery cells to adjust power limits, eliminating dependence on pre-stored information.
2Productivity
If pre-stored tables are used for power limit setting, then the implementation is simple, but real-time adjustments based on current cell voltages cannot be made
Solution Approach 1:
The patent transforms the static power limit determination (based on pre-stored tables) into a dynamic system that continuously monitors cell voltages and adjusts power limits in real-time. This enables rapid power limit adjustments based on current battery state while implementing a straightforward voltage comparison mechanism.
Solution Approach 2:
The system implements continuous feedback by monitoring cell voltages and using this information to dynamically adjust power limits. The voltage monitoring feedback loop enables real-time power limit adjustments without complex implementation, as the system simply compares current voltages against threshold values.
3Adaptability or versatility
If maximum output limit is set simply on basis of temperature or voltage, then the control is simple, but the power limit cannot be optimized based on real-time cell voltage variations
Solution Approach 1:
The patent applies local quality by monitoring individual cell voltages rather than just overall battery voltage or temperature. Each cell's voltage is independently monitored and used to determine power limits, allowing optimized power limits based on real-time variations in specific cells while maintaining simple voltage comparison logic.
Solution Approach 2:
The system dynamically changes the power limit parameter based on real-time voltage measurements. Instead of using fixed temperature or voltage thresholds, the patent continuously adjusts power limits by monitoring cell voltage variations, achieving optimization through parameter changes without increasing control mechanism complexity.
Data Source
AI summary
Discussed is a method for managing a battery that includes a plurality of battery cells, the method including a reference charging power limit setting operation of setting a referential predetermined charging power limit, and a real-time charging power limit setting operation of calculating a real-time charging power limit in real-time according to a real-time voltage of the battery and setting a real-time charging power limit of the battery. The real-time voltage of the battery is determined based on a voltage of one battery cell among the plurality of battery cells.