What is the voltage of a fully charged 72V battery with 6 cells?
4 Answers
A 72V battery pack consists of six 12V batteries. A single 12V battery when fully charged reaches 14.5V, so six batteries would be around 87V. Below is an introduction to battery charging voltage and current: 1. Voltage: The charging voltage for a car battery is 12V. During the charging process, the voltage typically ranges between 13.5-14.5V. When charged in the vehicle via the rectifier, it does not exceed 15V. If using a charger, the charging voltage is generally 14V. 2. Current: During the charging process, the charging current should not be too high. It is recommended that car owners avoid using fast charging. When charging, use a current that is half of the rated charging current, and extend the rated charging time by double.
As someone who frequently works with electric vehicles, I can tell you that a 72V system composed of six batteries typically reaches around 86V when fully charged. This is significantly higher than the nominal 72V because the voltage temporarily increases during charging to store energy. I've measured my own vehicle several times with a multimeter, and right after charging, it usually reads 86-87V before gradually dropping to the normal value. This is completely normal, so don't worry about explosions. However, be cautious not to use substandard chargers, as excessive voltage spikes can damage battery lifespan. I recommend regularly checking the voltage and electrolyte levels to avoid overcharging and leakage risks. After all, battery health affects range—I've learned this firsthand when driving on mountain roads. Stable voltage ensures you can go the distance.
From a basic electrical perspective, a series connection of six 12V batteries nominally forms a 72V system. When fully charged, each battery's voltage rises to about 14.4V, resulting in a total voltage of approximately 86.4V. The charging process increases the voltage, which is a characteristic of lead-acid batteries. In practice, the voltage can be affected by temperature and charger accuracy—for example, in cold weather, it might reach 90V, but generally, 86-88V is the safe range. I often test small appliances to ensure accurate data, so you could buy a multimeter to try it yourself. Remember, excessively high voltage is a signal that you might need to replace the batteries or adjust the charger settings.
A 72V battery with 6 cells shows around 86V when fully charged. This value is higher than 72V, but don't panic—it's normal. The charger controls the voltage boost to fully charge the batteries, and the voltage will drop afterward. Personally, I've noticed that after a full charge, the voltage drops to around 75V after just a few minutes of driving. A quick reminder: avoid overcharging to prevent battery damage or fire risks. Regular maintenance is crucial—for example, cleaning the charging contacts to ensure good connectivity. This extends battery life. I keep a fire extinguisher in my home garage just in case.
