Dynamic Battery Charge Limit Adjustment for Power Consistency
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Solution Overview
Problem
Battery systems face challenges in maintaining stable charging and discharging operations over time, leading to reduced power supply capacity as the number of charge and discharge cycles increases, resulting in inefficient energy storage and utilization.
Innovation Solution
A battery management unit that dynamically adjusts charge and discharge limit values based on the number of cycles, increasing the difference between these values over time to maintain a constant power supply, with the battery management unit including a voltage measurement unit to determine when these limits are reached, ensuring the battery module provides a consistent amount of power throughout its lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the battery module operates with fixed charge and discharge limit values throughout its lifespan, then the control system is simple, but the power supply capacity decreases as the number of charge and discharge cycles increases
Solution Approach 1:
The patent applies dynamics by transitioning from fixed charge and discharge limit values to dynamically adjustable limit values that change based on the number of charge and discharge cycles. The battery management unit automatically adjusts the charge limit value and discharge limit value according to the elapsed time or cycle count, allowing the system to adapt to battery degradation over time and maintain consistent power supply capacity without requiring complex manual intervention
Solution Approach 2:
The patent implements feedback by having the battery management unit monitor the number of charge and discharge cycles performed by the battery module. Based on this feedback information, the system automatically adjusts the charge and discharge limit values to compensate for battery degradation, ensuring that the power supply capacity remains consistent throughout the battery's operational lifespan
2Power
If the charge limit value and discharge limit value are adjusted to increase the width between them over time, then the power supply capacity is maintained constant, but the control complexity increases
Solution Approach 1:
The battery management unit performs self-service by automatically monitoring the number of charge and discharge cycles and autonomously adjusting the charge and discharge limit values based on predetermined algorithms. This self-adjusting mechanism maintains constant power supply capacity without requiring external intervention or complex control systems, as the unit independently manages its own parameter optimization based on operational history
Data Source
AI summary
A battery system and an energy storage system including a battery module. The battery system includes at least one battery module that may perform charging and discharging, and a battery management unit that controls the charging and the discharging of the battery module. The battery management unit varies a charge limit value for stopping the charging of the battery module and a discharge limit value for stopping the discharging of the battery module. Accordingly, a lifetime of the battery module is extended.