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Soluble lead flow battery for PV applications – pv magazine International


UK researchers have investigated the price of a 24V soluble lead movement battery optimized for PV functions. They discovered {that a} whole part price of GBP 50 ($62)/kWh might be achieved, which is half that of current nickel-manganese-cobalt (NMC) lithium-ion cells.

The soluble lead movement battery (SLFB) is a promising small-scale vitality storage know-how particularly for creating economies, as a result of its stability, a lifetime of 2000 cycles demonstrated on the cell stage. , and the truth that its electrolyte is made instantly from spent lead. acid batteries.

Nevertheless, there’s a want for techno-economic fashions to permit the price/efficiency of a whole system to be outlined and optimized.

Now, researchers from the College of South Hampton and the College of Sheffield in the UK for the primary time outlined such a mannequin and used it within the design of a 24V system for a charging hub in Sierra Leone.

A 1.64 kW 4 h period system was discovered to be the perfect, earlier than the start of diminishing returns. The simulated effectivity of this technique is 59%.

The researchers discovered that the electrolyte for the three.5 kW/14 kWh system suits right into a 1000 L IBC. Growing the unit measurement from ~ 1.5 kW to ~ 3.75 kW would cut back the price of the IBC from GBP 16/kWh to GBP 7/kWh, they calculated.

Methanesulfonic acid (MSA) was discovered to be the biggest price part within the 4-hour system, with graphitic bipolar plates subsequent. Each have low uncooked materials prices, and in an optimistic state of affairs a complete part price of <£50/kWh could be achieved, half of present NMC Li-ion cells.

That’s, the present price of the parts (together with the manufacture of the stack body) is estimated at GBP98 / kWh to GBP 120 / kWh (excluding management and meeting) assuming that the deposit thickness of 1 mm could be reliably achieved. Nevertheless, in accordance with the researchers, MSA and bipolar plates have the potential for future worth reductions as extra environment friendly manufacturing methods have not too long ago been launched.

Due to this fact, the researchers calculated that with diminished MSA and bipolar plate prices, this vary might be as little as £43-£56/kWh, making SLFB cheaper on the DC stage than NMC Li-ion cells. .

The most important danger to the price of the system is the lack to reliably deposit lead and lead oxide to the assumed thickness of 1 mm, with thinner deposits rising part prices and lowering effectivity.

“Because the testing of deposits of this thickness has not been carried out over a number of cycles, there is a vital hole within the data of SLFB that needs to be addressed in future analysis,” the researchers wrote inPrice prediction of a 24V soluble lead movement battery optimized for PV functions,” not too long ago revealed in Journal of Energy Sources.

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