Energy Storage Charge-Discharge Control for Battery Aging and Temperature
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Solution Overview
Problem
Energy storage power stations face challenges in reasonably adjusting their charging-discharging efficiency due to aging batteries, temperature variations, and operational complexities, which affect income and battery life.
Innovation Solution
A method and apparatus that dynamically adjust charging and discharging currents using preset step lengths and coefficients to optimize charging and discharging efficiency, incorporating real-time voltage monitoring and feedback adjustments to match battery capacity with operational conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high-power discharging is used to increase income from peak clipping, then the charging-discharging efficiency ratio decreases due to larger battery loss
Solution Approach 1:
The patent implements dynamic adjustment of discharging power based on real-time battery temperature and state of charge. The control system continuously monitors battery conditions and adjusts the discharging power level accordingly, transitioning from fixed high-power discharging to adaptive power management that optimizes the balance between income generation and battery loss.
Solution Approach 2:
The patent changes key operating parameters including discharging power level, charging-discharging efficiency ratio, and temperature thresholds. By dynamically adjusting these parameters based on battery temperature and state of charge, the system optimizes the charging-discharging efficiency ratio while maintaining economic benefits from peak clipping operations.
2Reliability
If low temperature operation is used to reduce battery degradation, then the discharging power and efficiency are significantly reduced
Solution Approach 1:
The patent implements preliminary heating of the battery before discharging operations when the battery temperature is low. By pre-heating the battery to an optimal temperature range before high-power discharging, the system ensures both battery protection and adequate power output capability, resolving the contradiction between battery life extension and power maintenance.
Solution Approach 2:
The patent dynamically adjusts the discharging power parameter based on battery temperature conditions. When temperature is low, the system modifies the discharging power level and efficiency ratio to prevent excessive degradation while maintaining operational effectiveness, rather than using fixed power levels regardless of temperature.
3Ease of operation
If fixed charging and discharging powers are used to simplify operation, then the charging-discharging efficiency cannot be adjusted for aging batteries and temperature variations
Solution Approach 1:
The patent implements a self-adjusting control system that automatically monitors battery temperature, state of charge, and aging conditions, then autonomously adjusts the charging and discharging power levels and efficiency ratios. This eliminates the need for manual intervention while providing adaptive optimization, resolving the contradiction between operational simplicity and adaptability.
Solution Approach 2:
The patent employs real-time feedback mechanisms where the control system continuously monitors battery conditions including temperature, state of charge, and performance degradation, then uses this feedback to dynamically adjust charging-discharging efficiency ratios. This closed-loop control maintains operational simplicity while achieving high adaptability to changing battery conditions.
Data Source
AI summary
The invention provides method, apparatus and storage medium for adjusting the charging-discharging efficiency ratio of an energy storage power station. The method comprises before charging, determining theoretical charging electric quantity, theoretical charging average power, initial charging voltage and initial charging current; in the charging process, adjusting the current charging current by using a preset step length; responding to meeting the charging cutoff condition, ending the charging process, and recording the charging power, charging average power and actual charging time during the charging process; before discharging, determining theoretical discharging electric quantity, theoretical discharge average power and initial discharge current; in the discharging process, adjusting the current discharging current by using a preset step length; and responding to meeting the discharge cutoff condition, ending the discharge process, and recording the discharging electric quantity, the discharge average power and the actual discharge time duration during the discharge process.