Fumatech Bwt Gmbh products

The progress of fuel cell technology since middle of 80s has converted the fuel cell concepts to a widely accepted power units for 21st century. The central component of the technology is the membrane. The membranes are designed to high-power, high lifetime, and high reliability at application’s conditions. Depending on the application, the membranes are distinguished mostly by its thickness. Special types of fuel cells are powered by electrochemical conversion of low alcohols. The thinnest membranes 10-15 µm are tailored to use in fuel cell vehicles of power class from 50kW up to 300kW such as passenger cars, light-duty trucks or buses; this class includes also the scalable modules for trains. The thickness of membranes for projected propulsion of heavy-duty trucks and in marine sector is approaching 20-30 µm for its ultimate lifetime meeting the target of the power class of 500 kW up to multi-MW system.

The redox-flow-battery (RFB) systems are complementary devices for pairing of the green electricity production with energy storage systems in range between 100kWh and 1.000 MWh. The RFBs are facilitating frequent load changes on input while featuring easy maintenance, scalability, robust operation parameters and very advantageous CAPEX for its longevity. The key part of the system is the membrane that determines the efficiency of the process. The main portion of RFB installations is built with vanadium redox-flow-battery (VRFB). The VRFB are based on electrolyte made from water-soluble vanadium sulfate species. The vanadium charge bearers are separated by a membrane that also transports the released counterpart of vanadium ions. Depending on the system, one can use either cation-exchanged membranes transporting protons and featuring high power density or anion-exchanged membranes transporting sulfate ions and featuring easy management and high efficiency.