Intrinsically safe C-size cell delivers high power performance in potentially explosive atmospheres
The launch of the new M52Ex lithium manganese dioxide (Li‐MnO2) C‐size cell follows the success of Saft’s Friwo M20Ex D‐size cell, introduced in 2010. In addition to claiming a world‐leading level of high performance for intrinsically safe cells, the two cells are currently the world’s only high power lithium cells to be rated T4 at +70°C.
In common with the Friwo M20Ex, the M52Ex cell has been designed in compliance with the IEC 60079‐11 standard (Explosive atmospheres – Part 11: Equipment protection by intrinsic safety “I”). The new C‐size cell provides a nominal capacity of 5.1 Ah (at +20°C, under a 200 mA discharge) and a pulse capability up to 4 A. It also offers the benefits of a low self‐discharge rate – less than 1% per year of storage at +20°C ‐ and the capability to operate over a wide temperature range (‐40 to +70°C).
The Friwo M52Ex cell is based on a spiral electrode construction for high pulse applications and has an industrial design housed in a stainless steel container, with glass to metal seal, laser welding and safety vent for long shelf life. The electrode construction ensures a high level of resistance to corrosion and safety under abusive conditions.
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