What Are the Effects of a Weak Car Battery?

[DiReagan]

If a car battery remains in a weak state for an extended period, the most immediate damage is excessive carbon buildup in the engine, leading to a significant drop in power. Here is some relevant information about car batteries: 1. Working Principle: A car battery uses lead plates filled with sponge-like lead as the negative electrode and lead plates filled with lead dioxide as the positive electrode, with a 22–28% dilute sulfuric acid solution as the electrolyte. During charging, electrical energy is converted into chemical energy, and during discharging, chemical energy is converted back into electrical energy. When discharging, metallic lead serves as the negative electrode, undergoing oxidation to form lead sulfate, while lead dioxide acts as the positive electrode, undergoing reduction to also form lead sulfate. When charging with direct current, lead and lead dioxide are regenerated at the respective electrodes. After disconnecting the power source, the battery returns to its pre-discharge state, forming a chemical cell. A lead-acid battery is rechargeable and reusable, known as a secondary battery, with a voltage of 2V. Typically, three lead-acid batteries are connected in series to achieve 6V. Cars use six lead-acid batteries connected in series to form a 12V battery pack. Regular lead-acid batteries require periodic replenishment of sulfuric acid to maintain the electrolyte at 22–28% dilute sulfuric acid. 2. Classification: Conventional batteries, dry-charged batteries, and maintenance-free batteries.