Redox Flow Battery Idle Mode Pulsed Discharge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Redox flow battery systems face issues during idle periods, where the bipolar plate can crack and flake when exposed to electrolyte without active current flow, leading to decreased charging potential, electrical shorts, and membrane degradation due to metal flaking.
Innovation Solution
Operating the redox flow battery in a short-term idle mode by discharging a current density as a pulse over a duration shorter than the idle period to maintain the plating surface at the negative electrode, thereby preventing cracking and flaking of the plated layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the redox flow battery system is maintained in an idle state with electrolyte flow, then the system readiness to supply power is sustained, but the plated layer on the bipolar plate cracks and flakes
Solution Approach 1:
The patent applies periodic action by implementing a pulsed discharge current during idle periods. Instead of maintaining a completely static idle state, the system periodically discharges current in pulses, which prevents the plated layer from cracking and flaking while maintaining system readiness. This periodic electrical action keeps the plated layer stable without requiring continuous electrolyte flow.
2Stability of the object's composition
If the redox flow battery is discharged continuously to maintain plating surface, then the plated layer cracking is prevented, but excessive current is sacrificed
Solution Approach 1:
The patent applies partial action by implementing pulsed discharge current instead of continuous discharge. The pulsed nature means current is applied intermittently rather than continuously, providing just enough electrical action to prevent plated layer degradation without the excessive energy loss that would result from continuous discharge. This partial action approach optimizes between plating maintenance and energy conservation.
3Productivity
If metal flakes are allowed to circulate in the electrolyte, then the battery continues operating, but membrane degradation and electrical shorts occur
Solution Approach 1:
The patent applies preliminary anti-action by preventing the formation and detachment of metal flakes through pulsed discharge current during idle periods. By maintaining the plated layer integrity through periodic electrical action, the system prevents metal flakes from forming in the first place, thereby preventing the harmful effects of membrane degradation and electrical shorts before they can occur.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively suppresses cracking and flaking of the metal plating at the negative electrode during idle periods while minimizing the sacrificed current, maintaining battery performance and preventing electrical shorts and membrane degradation.
Implementation Method 1
Redox flow batteries are suitable for grid scale storage applications due to their capabilities of scaling power and capacity independently, and charging and discharging for thousands of cycles with minimal performance losses
Implementation Method 2
operating the redox flow battery in a short-term idle mode by discharging a current density as a pulse over a duration that is shorter than the duration of the short-term idle mode, wherein discharging the redox flow battery maintains the plating surface at the negative electrode
Data Source
AI summary
Systems and methods are provided for a redox flow battery. In one example, a method for the redox flow battery includes operating the redox flow battery in a short-term idle mode by discharging a current density as a pulse of a duration shorter than a duration of the short term idle mode. By discharging the current density, a plating surface at a negative electrode of the redox flow battery system may be maintained.