Aquion’s Aqueous Hybrid Ion (AHI) batteries are non-toxic, non-corrosive, and contain no heavy metals, making them environmentally benign. They can be disposed of as ordinary trash, although recycling is recommended. The electrolyte is sodium sulfate based salt water with a neutral pH. As a result, electrolyte spillage – a common hazard with both acid and alkaline based battery chemistries – is not a concern with AHI batteries. The batteries are also extremely fault tolerant. They can be short circuited without causing an explosion or fire. It has been shown that AHI batteries can operate after short circuit with only a slight degradation in overall capacity.
AHI batteries do not use corrosive reactions to store electrical energy as is common for other battery chemistries such as lead-acid. As a result, AHI batteries do not need to be immediately charged once they have been discharged. They can be held at a partial state of charge for very long periods of time without damage. Furthermore, AHI batteries do not require a float charge and can operate to 100% DOD with no significant degradation. High temperatures do not affect the lifetime or performance of the battery.
AHI batteries offer an industry leading total cost of ownership. Their long lifetimes, very low maintenance costs, and low system costs result in a battery that delivers more value over its lifetime than other leading solutions. Long lifetimes have been demonstrated: Prototype cells with AHI technology show <10% capacity fade after up to >5,000 cycles at over 50% DOD and >15,000 cycles following the Sandia National Lab “partial state of charge” rapid cycling protocol.
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