车用蓄电池的正、负极一般通过直流电压表、直流电流表和三用表这些工具进行测量识别，但出门在外也可用些土方法加以辫别。 1、根据极柱的颜色辫别。新蓄电池正、负极柱均为青灰色，使用1至2个月后，凡是充过电的电柱头呈深褐色者为正极，一般极柱颜色较深。电柱头呈浅灰色者 Vehicle battery positive and negative electrodes generally through the DC voltmeter, DC ammeter and meter with these three tools to measure the identification, but can also be used some of the soil out of the way to braid. 1, according to the color of the poles braid. The new battery positive and negative poles are blue gray, use 1 to 2 months after, all the electric head of the electric column is dark brown for the positive electrode, the general color darker. Electrical stigma was light gray