电瓶起鼓的几个秘密小措施（Secret measures for lifting drums in a battery）.doc

电瓶起鼓的几个秘密小措施（Secret measures for lifting drums in a battery） Electric vehicle batteries prevent drums from blowing up in summer The vast number of electric car users in the feel of the electric car side brings, at the same time, almost a year for the battery and troubled. An authoritative electric car magazine statistics found that in the summer, electric vehicle battery replacement rate of up to 70~80%, and in these replacement batteries, more than 80% of the battery because the drum and scrapped. The main reason of the battery lifting is that the heat of the battery is out of control and the internal circuit of the charger is out of control. The method to prevent the battery from lifting is to add nano carbon sol, battery activator or press temperature control breaker. I. causes of battery bulging The drum is due to battery charging the battery into the battery into the thermal runaway state, thermal runaway state is due to the charging current is too large or the battery after a certain period of time, the battery caused by sulfuration resistance increases, the temperature will rise in the current battery under the effect of increased resistance after charging, the temperature rise will make the current increasing further, thus formed the vicious spiral, the inner pressure, finally deform the battery. The main reason for the battery lifting is the runaway heat of the storage battery and the runaway of the internal circuit of the charger. (1) the thermal runaway of the battery causes the battery to blow up Thermal runaway refers to the accumulator when charging, the current and battery temperature has an accumulation of reinforcing effect, and gradually damaged. Lead-acid battery, severe water loss after curing, the internal resistance of the battery is increased, the amount will lead to heat the battery during charging and discharging of the battery increases, the gassing overpotential decreases, gas evolution increases, a large amount of oxygen cathode precipita