Valence Expands Lithium-Ion Lineup
23 January 2006
Valence Technology has announced eight new models of its large-format lithium-ion batteries based on its proprietary Saphion technology. (EDrive Systems uses Valence Saphion batteries in their plug-in Prius conversions. (Earlier post.)
Four new U-Charge XP Power Systems are capable of peak power rates of 500 to 1,700 continuous watts, depending on the model. Each of the four new models integrate battery monitoring electronics with an communications port and as many as 30 of these battery systems can be connected in series for very high voltage applications, such as pure electric vehicles, series-hybrid electric vehicles and power back-up.
Four new U-Charge RT Power Systems each feature built-in battery management electronics for voltage, temperature and state-of-charge monitoring and cell balancing. They also include internal disconnects, making them extremely fault-tolerant, as each battery system can protect itself from potentially damaging conditions.
To complement the new U-Charge RT and XP Power Systems, Valence Technology will offer battery management systems (U-BMS) and a battery discharge indicator (U-BDI).
The U-BMS can be used with 12-volt to 450-volt applications to provide smart battery-to-battery balancing, battery system monitoring, direct control of external disconnects and remote battery system control.
The U-BDI is a companion device that displays the state-of-charge for U-Charge RT Power System models.
The Valence batteries use a phosphate-based cathode material rather than the cobalt-oxide used in traditional Li-ion cells. Phosphates are stable in overcharge or short circuit conditions and have the ability to withstand high temperatures without decomposing. When abuse does occur, phosphates are not prone to thermal runaway and will not burn.
In addition to being more stable and safer, the phosphate-based batteries offer better longevity and discharge than their cobalt-oxide counterparts.
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