This month, IECEE issued two resolutions on IEC 62133-2 concerning the selection of upper/lower limit charging temperatures of cell and the limited voltage of battery. The following are the details of the resolutions:

Resolution 1

The resolution clearly states: In the actual test, no carrying out the +/-5℃ operation is acceptable, and charging can be carried out at the normal upper/lower limit charging temperature when charging in the manner of Clause 7.1.2 (requiring charging at upper and lower limit temperatures), though Appendix A.4 of the standard states that when the upper/lower limit temperature isn’t 10°C /45°C, the expected upper limit temperature shall be increased by 5°C and the lower limit temperature needs to be reduced by 5°C.

In addition, the Panel of IEC SC21A(Sub-Technical Committee on Alkaline and Non-Acidic Batteries) intends to remove the +/-5℃ requirement in Appendix A.4 in the case of IEC 62133-2:3.2017/AMD2.

Resolution 2

Another resolution specifically addresses the IEC 62133-2 standard’s voltage limit for batteries: no more than 60Vdc. Although no explicit voltage limit is given in IEC 62133-2, its reference standard, IEC 61960-3, excludes batteries with a nominal voltage equal to or higher than 60Vdc from its scope.