IEC 62133-2012 pdf free

IEC 62133-2012 pdf free.Secondary cells and batteries containing alkaline or other non-acid electrolytes – Safety requirements for portable sealed secondary cells, and for batteries made from them, for use in portable applications.
5 General safety considerations
5.1 General
The safety of secondary cells and batteries requires the consideration of two sets of applied conditions:
• intended use;
• reasonably foreseeable misuse.
Cells and batteries shall be so designed and constructed that they are safe under conditions of both intended use and reasonably foreseeable misuse. It is expected that cells or batteries subjected to misuse may fail to function following such experience. They shall not however present significant hazards. It may also be expected that cells and batteries subjected to intended use shall not only be safe but shall continue to be functional in all respects.
Potential hazards which are the subject of this standard are:
a) fire,
b) burstiexplosion,
C) leakage of cell electrolyte,
d) venting.
e) burns from excessively high external temperatures,
f) rupture of battery case with exposure of internal components.
Conformity with 5.2 to 5.7 is checked by inspection, by the tests of Clauses 7 and 8, and in accordance with the appropriate standard (see Clause 2).
5.2 Insulation and wiring
The insulation resistance between the positive terminal and externally exposed metal surfaces of the battery excluding electrical contact surfaces shall be not less than 5 at 500 V d. c. when measured 60 s after applying the voltage.
Internal wiring and its insulation shall be sufficient to withstand the maximum anticipated current, voltage and temperature requirements. The orientation of wiring shall be such that adequate clearances and creepage distances are maintained between connectors. The mechanical integrity of internal connections shall be sufficient to accommodate conditions of reasonably foreseeable misuse.
5.3 Venting
Battery cases and cells shall incorporate a pressure relief mechanism or shall be so constructed that they will relieve excessive internal pressure at a value and rate that will preclude rupture, explosion and self-ignition. If encapsulation is used to support cells within an outer case, the type of encapsulant and the method of encapsulation shall neither cause the battery to overheat during normal operation nor inhibit pressure relief.
5.4 Temperature!voltagelcurrent management
The design of batteries shall be such that abnormal temperature-rise conditions are prevented. Batteries shall be designed to be within temperature, voltage and current limits specified by the cell manufacturer. Batteries shall be provided with specifications and charging instructions for equipment manufacturers so that associated chargers are designed to maintain charging within the temperature, voltage and current limits specified.
NOTE Where necessary. means can be provided lo Ilmd current to sate levels during charge and discharge.
5.5 Terminal contacts
Terminals shall have clear polarity marking on the external surface of the battery. The size and shape of the terminal contacts shall ensure that they can carry the maximum anticipated current. External terminal contact surfaces shall be formed from conductive materials with good mechanical strength and corrosion resistance. Terminal contacts shall be arranged so as to minimize the risk of short circuits.IEC 62133 pdf download.