The Cellennium (Thailand) Company Limited is the sole licensee to commercialize in Thailand a number of new inventions associated with vanadium fuel cells. These inventions are owned by Squirrel Holdings Limited and are protected by patents or by applications for patents worldwide. The new inventions provide efficient and low cost methods for electricity storage and conversion of DC and AC inputs and outputs.

The technology owned by Squirrel Holdings has its roots based on the original patent related to the vanadium battery technology, which was granted in 1978 to Pellegri and Spaziante. Following the science of the original vanadium battery technology, a team of European scientists, with long history in academic and industrial research and development, has achieved a major breakthrough in creating a novel design architecture of the vanadium battery or fuel cell. As a result of this achievement, the prospects are much better for realizing very low-cost manufacturing methods to produce vanadium fuel cell systems.

Basic Principle of the
Vanadium Fuel Cell

A vanadium fuel cell is an electrochemical cell divided into two compartments by an ionic membrane with acid vanadium sulfate electrolytes in each compartment. The electrolytes are pumped through the compartments from two separate electrolyte tanks. The oxidation states of the vanadium are V2+ to V3+ in the negative electrolyte and V5+ to V4+ in the positive electrolyte.

A novel vanadium redox flow battery architecture which is more efficient, more stable, and safer than other vanadium battery designs.

An inexpensive method of dissolving vanadium pentoxide in an acid, thus simplifying the production of the electrolyte from natural sources of vanadium.

A highly efficient method of charging the battery with any DC or AC input and delivering a DC or AC output free from harmonics.