The alternator charges the battery while driving, particularly at highway speeds. At lower speeds, it mainly powers onboard electronics like AC and lights. The alternator ensures the battery remains charged and supplies energy to the vehicle’s electrical system during operation.
The battery stores energy and supplies it to start the engine and power accessories when the engine is off. However, the alternator’s charging system ensures the battery remains charged during driving. The voltage regulator controls the alternator’s output to prevent overcharging.
In addition to the alternator, the car’s serpentine belt connects the engine’s crankshaft to the alternator, allowing it to produce electricity continuously while driving. When the engine stops, the alternator ceases to charge the battery, and thus energy stored in the battery becomes critical for starting the engine again.
Understanding how a car battery charging system functions lays the groundwork for exploring potential issues. Next, we will examine common problems that can affect battery charging and their consequences for your vehicle.
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