EV battery

Lithium battery fire safety experiment

by：Vglory 2020-12-07

Source: 2020 - 04 - 11 now hits: first lithium batteries fire safety test to determine the scope of the battery after charging excessive fire and battery after excessive charging time of the fire, firefighters simulation experiment was carried out. The charger and battery as a power source used in the experiment for sale, such as car model. First of all, keep the lithium polymer battery charged, until it reaches a state of charge and is on fire. Then based on the differences of battery capacity and charging current value, the size of the observation time of arrival in fire and fire. Because of the excessive charging is artificial, so use common battery charger. Charge should be paid attention to when the electric current shall not exceed the battery capacity is safe, but this experiment determined under the condition of the quick charge, charge can lead to cell rupture. ( 1) Experimental conditions and results. With 6 a current to charge a lithium polymer battery ( 2200 mah) Charging. This is faster than general charge 2. Seven times. Charge after 31 minutes, synthetic resin box is broken, and 36 minutes to produce white smoke, fire 37 minutes. Video measuring flame a maximum length of 100 cm ( As shown in figure C) 。 ( 2) Will be fully charged polymer lithium battery ( 2200 mah) With 10 a charging current. It is faster than general charge about 4. 5 times. The experimental results are shown in table 1. ( 3) The polymer lithium battery ( 4200 mah) In order to 10 a current charge. It is faster than general charge about 2. 4 times. It has a capacity of about 2200 mah lithium polymer battery 1. Nine times.

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