Vanadium Flow Battery Layout for Distributed Power and SoC Balance
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Solution Overview
Problem
All-vanadium redox flow batteries face challenges in meeting power supply requirements for multiple external loads or power supply systems, especially when they are far apart, leading to insufficient storage capacity and affected reaction rates.
Innovation Solution
A distributed large-scale system is implemented with a main electrical energy storage center connected to power distribution subsystems through pipelines, incorporating sub-electric energy storage centers and a control subsystem to manage electrolyte distribution and balance state of charge (SoC) across multiple battery stacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the all-vanadium redox flow battery is connected to distant external loads or power supply systems through cables, then the power supply coverage is extended, but the transmission power loss increases and the reaction rate is affected
Solution Approach 1:
The patent applies hydraulic principles by replacing electrical cable transmission with electrolyte flow through pipelines. The electrolyte is pumped through pipes to distant battery stacks, enabling power supply to extended areas without the power losses inherent in cable transmission. This hydraulic approach allows the system to cover larger geographical areas while maintaining efficient energy transfer.
2Power
If the all-vanadium redox flow battery is connected to multiple distributed external loads, then the power supply capability is enhanced, but the storage capacity becomes insufficient
Solution Approach 1:
The patent divides the energy storage system into multiple distributed battery stacks connected through a pipeline network. Each battery stack can serve local loads independently, while the shared electrolyte circulation system enables coordinated operation. This segmentation allows the system to provide enhanced power supply capability to multiple distributed loads without requiring a single large central storage facility, effectively decoupling power delivery from storage capacity constraints.
3Power
If the reaction rate of the electrolyte is increased to meet power requirements of distributed loads, then the power output is improved, but the SOC state deviation increases
Solution Approach 1:
The patent implements a control subsystem that continuously monitors the State of Charge (SOC) of each battery stack and provides feedback control. Based on real-time SOC data, the system adjusts electrolyte flow rates and circulation patterns to maintain consistent charge states across all stacks. This feedback mechanism enables the system to deliver high power output to distributed loads while preventing SOC deviation and maintaining operational consistency.
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 system enhances power supply reliability, reduces transmission losses, and ensures rapid power support by converting cable energy into electrolyte transportation, while monitoring and balancing SoC in real time to extend battery life and meet power demands.
Implementation Method 1
the vanadium redox flow battery is a redox battery with vanadium substances in a circulating flow liquid state, stores electric energy in sulfuric acid electrolyte of vanadium ions with different valence states in a chemical energy mode
Implementation Method 2
the main electrical energy storage center is connected with the power distribution subsystem through a pipeline, so that the traditional cable transportation electric energy can be converted into electrolyte transportation in the pipeline
Data Source
AI summary
The application relates to a distributed large-scale system of an all-vanadium redox flow battery, comprising a main electrical energy storage center, power distribution subsystems and a control subsystem. If the power of the power distribution subsystem does not meet a preset power requirement and/or the distance between the power distribution subsystem and the main electrical energy storage center exceeds a preset distance, a sub electric energy storage center connected with the main electrical energy storage center is arranged in the power distribution subsystem. The power distribution subsystem comprises an electric energy load point and/or an electric energy access point. The main electrical energy storage center and the plurality of power distribution subsystems are electrically connected with the control subsystem respectively. The power supply system has the effect of meeting the power increase and decrease requirements of a plurality of distributed external loads or power supply systems.