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a Result 3C/12V 273 ℃ Swelling, vent open lightly, no fire, no explosion. Pass BYD COMPANY LIMITED 12 Overcharge ? Following show 3C/32V overcharge curve and cell photos. After test BYD COMPANY LIMITED 13 Fire exposure ? LiFePO4 has good safety performance. ? Following show the fire exposure result. Cell No. Voltage before test (V) Impedance before test (mΩ) Phenomena Result 258 Swelling, vent open, no fire, no explosion. Pass 268 Swelling, vent open, fire, no explosion. Pass 251 Pass Before test After test BYD COMPANY LIMITED 14