An undischarged battery shall be tested under the following procedure.
Temperature cycling procedure (see 1) to 7) below and/or Figure 2)
1) Place the batteries in a test chamber and raise the temperature of the chamber to
(70 ± 5) °C within t1 = 30 min.
2) Maintain the chamber at this temperature for t2 = 4 h.
3) Reduce the temperature of the chamber to (20 ± 5) °C within t1 = 30 min and maintain
at this temperature for t3 = 2 h.
4) Reduce the temperature of the chamber to (–20 ± 5) °C within t1 = 30 min and maintain
at this temperature for t2 = 4 h.
5) Raise the temperature of the chamber to (20 ± 5) °C within t1 = 30 min.
6) Repeat the sequence for a further nine cycles.
7) After the 10th cycle, store the batteries for seven days prior to examination.
Requirements:
There shall be no fire and no explosion during this test.
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