We have help pedal is to work overload caused by the motor coil overheat, or even lead to disaster in the running, climbing. The use of electric vehicles, in our side is very common, today small make up to say, we try not to use electric cars for a long time, especially in the summer, fever caused by circuit fault and short circuit phenomenon we are familiar with. The motor coil in the US is in the car follow like a shadow, always has its shadow. In fact, in many areas have its figure. The development of the times, after all, it is pushed to all corners of the world.