New Zealand-headquartered energy storage company ArcActive has switched on a lead-acid battery system pilot installed at Deakin University’s Waurn Ponds campus 7.25 MW microgrid battery testing facility.
ArcActive’s system combines its proprietary fabric electrode technology with a bipolar battery architecture to create a new generation of lead-acid batteries, building on lead-acid technology already in use to support critical infrastructure, including telecommunications, hospitals and data centres.
The system consists of bipolar batteries built as a stack of repeating cells, with each cell layered directly on top of the next. Rather than connecting individual cells using conventional straps and inter-cell connections, a bipolar plate forms the boundary between neighbouring cells while also carrying current directly from one cell to the next, ArcActive said.
The result is a compact, sandwich-like structure in which the electrodes, separators and bipolar plates are arranged as parallel layers.
ArcActive said as current flows directly through the thickness of the battery, it’s more uniformly distributed across the electrode area, reducing electrical resistance compared with traditional lead-acid battery designs.
The stacked construction also allows the electrodes to be maintained under high, uniform compression, which is beneficial for the positive electrode, where compression helps support the active material, reduce shedding and extend cycle life.
Excessive compression of conventional negative electrodes, however, can reduce porosity, restricting electrolyte access and limiting performance.The result is a safe, highly recyclable and long-life energy storage solution, which leverages established lead-acid materials and processes and a practical pathway to cost-effective energy storage at scale.
ArcActive Chief Executive Stuart McKenzie said lead-acid technology is a technology that engineers, approval authorities and insurers already know.
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