What is UltraBattery®?
UltraBattery® is a hybrid, long-life lead-acid energy storage device. It combines the fast charging rates and longevity of an ultracapacitor technology with the energy storage potential of a lead-acid battery technology in a hybrid device with a single common electrolyte.
UltraBattery® is highly efficient in a continuous Partial State of Charge (PSoC) operation: neither totally full, nor totally empty. Conventional valve-regulated lead-acid (VRLA) batteries, when used for renewable support, are typically operated in a top of range cycling pattern and quickly fail if operated in the PSoC range.
Unlike conventional VRLA batteries, which need to be frequently refreshed (equalized), UltraBattery® can run for longer between refreshes, and so has less downtime. It is also capable of far more charge–discharge cycles than conventional VRLA batteries – meaning a longer battery life.
How UltraBattery® Works
During normal lead-acid battery operation, lead sulphate crystals grow on the negative electrode during discharging and dissolve during charging. Over time – in a process called sulphation – some crystals can become larger and resist being dissolved, increasing the battery’s internal resistance, and decreasing its power, capacity and efficiency.
The ultracapacitor integrated in the UltraBattery® inhibits this sulphation process, and allows the battery to operate with high efficiency in a Partial State of Charge.
Over time, electrolysis (splitting of water in the electrolyte into oxygen and hydrogen gas) leads to corrosion of a lead-acid battery’s positive plate, and also causes the battery to dry out, degrading performance.
Electrolysis occurs less frequently at a lower State of Charge. This means that UltraBattery® used in a Partial State of Charge also experiences less corrosion of the positive electrode and dries out more slowly than conventional VRLA batteries.
These characteristics combined enable UltraBattery® to outperform in its ability to process more energy in variable power applications.
- is a hybrid, long-life lead-acid energy storage device
- operates in a Partial State of Charge, and mitigates the deteriorating effects common to other lead-acid batteries
- accepts charge faster, lasts longer and is more efficient and cost-effective than conventional lead-acid batteries when used for variable power applications.