Many businesses in the electric car industry can clearly feel that when the weather gets hot, the battery bulges more than in other seasons. At present, many battery manufacturers to strengthen the standard of after-sales service, battery bulge is faced with degradation or even not after-sales.
1. Electric car chargers are exposed to high temperature to charge the battery, and the chargers' parameters drift.
When the weather gets hot, many EV users do not pay attention to the cooling of the charger when charging the battery. When the charger is heating up, it is easy to cause the parameter drift of the charger if exposed to high temperature again. Especially some chargers with poor quality, the parameter drift at high temperature is more common, when the battery has been fully charged, the parameter drift of the charger can not turn the light in time, but also to charge the battery, after many times, the battery naturally easy to charge drum.
2. The battery is charged as soon as the electric car stops, before it cools down.
Electric vehicles in the riding state, the battery itself will heat, coupled with hot weather, the temperature of the battery can even reach more than 70℃, at this time to charge the battery will aggravate the water loss of the battery, reduce the service life of the battery, aggravate the risk of battery drum.
3, in the condition of direct sunlight to charge the battery, aggravate the battery water loss.
The battery will also heat during the charging process. If the battery is charged in direct sunlight, it will also lead to the loss of water in the battery, causing damage to the battery, and then causing bulge.
When the weather gets hot, try charging your electric car in the shade or in the late afternoon. At present, battery manufacturers have a relatively large penalty on battery bulge. Once the battery bulge, it may face a price reduction penalty. Usually, when selling electric cars and changing batteries, customers should be reminded more, which is also to reduce their own troubles. The pressure of the relief valve is too high
Valve-controlled lead-acid batteries are equipped with a row of safety valves in order to ensure safe use. When the pressure in the battery rises, the safety valve will automatically open to release pressure, so as to ensure the balance of air pressure inside and outside the battery. And if the pressure in the battery rises, the safety valve can not be opened normally, over time, because the battery pressure is too high, internal and external pressure imbalance, there will be a bulge phenomenon.
Two. Overcharge over release
Battery engineers have repeatedly emphasized that the battery should try to prevent overcharging and over-discharging. Overcharging and over-discharge will lead to bad gas composite in the battery. There will be a violent reaction similar to short circuit in the battery, and a large amount of heat will occur, which will lead to the decomposition and gasification of the electrolyte, and the battery will bulge up.
