What is the normal power generation output for a car?
2 Answers
Car batteries are generally available in two types: 12V and 24V. The normal power generation output of a car alternator ranges between 12.6 volts and 14.5 volts, which is also the safe floating charge voltage value for a 12V battery. Below is some relevant information about car batteries: 1. Concept: A car battery, also known as a storage battery, is a type of battery that works by converting chemical energy into electrical energy. The battery referred to here is a lead-acid battery, which is primarily made of lead and its oxides, with sulfuric acid solution as the electrolyte. 2. Working Principle: The negative electrode is made of a lead plate filled with sponge-like lead, and the positive electrode is made of a lead plate filled with lead dioxide. A 22~28% dilute sulfuric acid solution is used as the electrolyte. During charging, electrical energy is converted into chemical energy, and during discharging, chemical energy is converted back into electrical energy. When the battery discharges, the metallic lead serves as the negative electrode, undergoing an oxidation reaction and being oxidized into lead sulfate; lead dioxide serves as the positive electrode, undergoing a reduction reaction and being reduced into lead sulfate.
As a car enthusiast, I've been studying vehicle electrical systems. The normal alternator output voltage should be between 13.5 and 14.8 volts, measured at idle after engine startup. This range is crucial because if it's too low (below 13V), the battery won't charge fully, making the car hard to start, especially in cold weather. If too high (above 15V), it may burn out bulbs or damage sensitive electronic components like the ECU. I regularly check voltage at the cigarette lighter port using a multimeter - it's convenient and accurate. Key factors include engine RPM and electrical load: 13V at idle is acceptable, but should approach 14V when running AC or headlights. The voltage regulator is critical for stable output; failure causes fluctuations. Maintaining this range extends battery life and avoids costly repairs. Remember, monthly voltage checks are good practice.
