Because the short circuit of the battery means that the anode and cathode of the battery are directly connected by wires into an abnormal path, which will lead to serious damage and combustion of the battery, which may cause a fire, or the battery container may explode due to excessive pressure.
The battery is short-circuited, and for some reason, the positive and negative electrodes of the battery are connected with each other under the condition of small resistance. This path will generate very large current (I=U/R) and a lot of heat (Q=U.I.t), which will seriously damage the battery life.
Extended data:
Daily maintenance skills of battery cars;
1. When the battery is idle, it should be fully charged.
When the battery is not charged in time after use, it is in a state of insufficient power. When the battery is stored in this state, it is easy to be sulfated, and the lead sulfate crystal adheres to the electrode plate, blocking the ion channel, resulting in insufficient charging and decreased battery capacity. The severity of battery damage is directly proportional to the idle time in the power-off state. Therefore, in order to keep the battery healthy, it is necessary to ensure that the battery is charged once a month in an idle state.
2, in the process of driving, should try to avoid slamming on the acceleration, driving instant large current discharge.
When the electric vehicle starts, carries people and goes uphill, if it suddenly steps on the acceleration, it will form an instantaneous large current discharge. High current discharge easily leads to crystallization of lead sulfate and damages the physical properties of battery plates. If the speed suddenly drops by tens of kilometers while driving, be sure to be careful that there may be something wrong with a certain battery, and check it as soon as possible.
Baidu encyclopedia-battery short circuit
People's Network -99% drivers don't know how to maintain electric vehicles.