Battery Charge Control Using Lifetime-Cost Benefit Thresholds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing energy storage systems, such as battery storage systems, operate under conservative limits to protect the battery's lifetime, which limits their utilization and prevents owners from maximizing the benefits of their energy storage capacity.
Innovation Solution
Implementing dynamic energy storage control techniques that allow for flexible and intelligent management of charging and discharging cycles based on the value of each cycle compared to the potential impact on the battery's lifetime, enabling more extensive use of the battery's capabilities during peak economic benefits while minimizing degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conservative limits are set on State of Charge to protect battery lifetime, then battery reliability is improved, but energy storage utilization is reduced
Solution Approach 1:
The patent implements dynamic State of Charge limits that adjust in real-time based on battery health state, temperature, and cycling conditions. Instead of fixed conservative limits, the system continuously adapts the allowable charge range to maximize utilization while protecting battery lifetime through condition-based adjustments.
Solution Approach 2:
The system changes the operating parameters (State of Charge limits, charge/discharge rates) based on battery health state and environmental conditions. By monitoring battery degradation and adjusting parameters dynamically, the system optimizes the balance between reliability and productivity without relying on static conservative limits.
2Reliability
If conservative operating limits are applied, then battery degradation is minimized, but economic benefits are reduced
Solution Approach 1:
The system dynamically adjusts operating parameters including State of Charge limits and power rates based on battery health state and economic conditions. This allows the system to operate more aggressively when economically beneficial while maintaining adequate protection, thereby reducing the loss of economic benefits compared to fixed conservative limits.
Solution Approach 2:
The control system continuously monitors battery health state, cycling patterns, and economic signals to adjust operating limits in real-time. This feedback mechanism enables the system to capture economic opportunities that would otherwise be missed by static conservative limits while still protecting battery lifetime through adaptive adjustments.
3Device complexity
If fixed State of Charge limits are used, then battery protection is simplified, but system adaptability is reduced
Solution Approach 1:
The patent transitions from fixed State of Charge limits to dynamic limits that adapt to battery health state, temperature, and cycling conditions. The control system automatically adjusts operating parameters based on real-time measurements, providing high adaptability without requiring complex manual intervention or oversimplified fixed rules.
Data Source
AI summary
Determining an energy storage device plan includes determining a benefit gradient associated with charging or discharging of an energy storage. It further includes determining, using an energy storage lifetime model, a cost gradient associated with a degradation of the energy storage due to charging or discharging. It further includes applying a threshold to the benefit gradient and the cost gradient. It further includes facilitating charging or discharging of the energy storage based at least in part on the threshold being met or exceeded.