Flow Cell Battery Tank Layout for Stable Power With Lower Flow Energy
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Solution Overview
Problem
Flow cell batteries face efficiency limitations and high costs due to the decoupling of energy storage capacity and power generation capacity, leading to inefficient electrolyte usage and increased energy consumption for maintaining power output.
Innovation Solution
A flow cell battery design featuring a top, bottom, and intermediate electrolyte tank configuration with controllable fluid communication and gas connections, utilizing a flowing device to optimize electrolyte flow and reduce gas volume, allowing for efficient electrolyte utilization and reduced energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electrolyte flow rate is increased to maintain constant power output when ionic concentration is low, then power output is maintained, but energy consumption increases and efficiency decreases
Solution Approach 1:
The patent implements dynamic flow rate adjustment based on real-time monitoring of ionic concentration and power output requirements. The system transitions from static to dynamic operation, continuously adapting electrolyte flow rates to match actual reaction conditions, thereby optimizing energy efficiency while maintaining required power output.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor ionic concentration, power output, and flow rate parameters. This feedback enables closed-loop control where the system automatically adjusts electrolyte circulation to maintain optimal efficiency, preventing energy waste from excessive flow rates while ensuring sufficient power delivery.
2Power
If electrolyte flow rate is increased to maintain constant power output, then power output is maintained, but system efficiency decreases
Solution Approach 1:
The system dynamically adjusts electrolyte flow rates based on real-time system conditions including ionic concentration and power demands. This dynamic adaptation prevents inefficient operation modes and maintains optimal productivity by matching flow rates precisely to reaction requirements rather than using fixed high flow rates.
Solution Approach 2:
Through continuous monitoring and feedback control, the system optimizes the balance between power output and efficiency. The feedback mechanism ensures that flow rate increases only occur when necessary for maintaining power output, thereby preserving overall system efficiency while meeting power requirements.
3Quantity of substance
If ionic concentration of reactants is low, then fewer ions are available for reaction, but increasing flow rate to compensate increases energy consumption
Solution Approach 1:
The system changes multiple parameters simultaneously - adjusting flow rate, monitoring ionic concentration, and modifying power output targets - rather than relying on a single parameter adjustment. This multi-parameter optimization allows the system to maintain power output with minimal energy consumption even when ionic concentration varies.
Solution Approach 2:
The feedback system monitors ionic concentration levels and automatically adjusts flow rate and power output parameters accordingly. When ionic concentration is low, the system intelligently determines the minimal flow rate increase needed to maintain power output, avoiding excessive energy consumption that would result from blanket flow rate increases.
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 design enhances efficiency by ensuring 100% utilization of electrolytes, reducing energy requirements for electrolyte flow, and maintaining stable power output, thereby improving the overall performance and cost-effectiveness of flow cell batteries.
Implementation Method 1
a flowing device for controlling a flow of electrolyte between the at least one intermediate electrolyte tank and the top electrolyte tank through the cell stack to the bottom electrolyte tank
Implementation Method 2
each of the top, bottom and at least one intermediate electrolyte tank comprise at least one gas connection for flowing gas in and out of each respective tank
Implementation Method 3
Flow cell batteries are a rechargeable fuel cell and is unique from conventional batteries insomuch that the energy is stored in electrolytes and not in electrode materials
Implementation Method 4
a cell stack to transform energy states
Data Source
AI summary
A flow cell battery comprising on at least one side of a cell stack; a top electrolyte tank, a bottom electrolyte tank and at least one intermediate electrolyte tank arranged therebetween. The top electrolyte tank is in fluid communication with the bottom electrolyte tank through the cell stack. A first fluid communication is provided between the at least one intermediate electrolyte tank and the top electrolyte tank for flowing therebetween. A second fluid communication is provided between the at least one intermediate electrolyte tank and the bottom electrolyte tank for flowing therebetween. The second fluid communication comprises a controllable fluid flow restrictor. Each of the top, bottom and tanks comprise at least one gas connection for flowing gas in and out of each respective tank. A flowing device is provided for controlling a flow of electrolyte between the tanks.