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 offering a unique, 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 very 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°C 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. It ensures a high level of resistance to corrosion and safety under abusive conditions.