正极上的“红帽子” 细心的车主应该会观察到在大多数蓄电池的正极上总会套着一个红色的胶套,而负极往往是裸露的,这是为什么呢?因为绝大部分轿车的蓄电池都安放在发动机舱内,蓄电池的正、负极与发动机舱盖离的很近,为了防止正极与发动机舱盖偶尔接触, The “red hat” attentive owner on the positive should observe that there is always a red rubber sleeve over the positive of most batteries, and the negative is often bare, why? Because most cars Batteries are placed in the engine compartment, the battery positive and negative close to the engine compartment cover close, in order to prevent the positive and the engine compartment cover occasional contact,