How to Distinguish Between the Positive and Negative Terminals of a Car Battery?
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Distinguishing between the positive and negative terminals of a car battery can be done by observing the color of the wiring harness. If it is red, the terminal is positive, while black indicates the negative terminal. Differences between positive and negative terminals: The thicker terminal post is the positive terminal of the battery, and the thinner one is the negative terminal. Working principle: During charging, electrical energy is converted into chemical energy, and during discharging, chemical energy is converted back into electrical energy. When the battery is charged with direct current, lead and lead dioxide are generated at the two electrodes respectively. After the power source is removed, it returns to the state before discharge, forming a chemical battery. A lead-acid battery is a rechargeable battery that can be repeatedly charged and discharged, known as a secondary battery.