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12 volt voltage gauge
Mostly the voltage of car motorcycle boat and so on is 12V . So it match the 12 volt voltage gauge. Generally, when the 12V battery of a car is off, the voltage should be about 12.8v (plus or minus 0.3V). If the voltage is lower than 12.5V, supplement power in time. When the 12V battery is fully charged, the general voltage is normal around 13V . If the voltage after full charge is only 12V or even less than 12V, it indicates that the performance of the battery has been weakened and has reached the service life.
The nominal voltage of single lead-acid battery is 2 V, and the normal termination discharge voltage is 1.8 v . the general automobile battery is actually 12 V formed by six single batteries in series. Therefore, the termination discharge voltage is 10.8 V, and the output voltage of automobile engine and standard charger is 13.8 v. therefore, the upper limit of the normal voltage of 12 V automobile battery is 13.8 V and the lower limit is 10.8 v.
The charging voltage of 12V motorcycle battery is generally between 13.5-14.5v . It is charged by rectifier on the vehicle, which generally does not exceed 15V . It is generally more than 14V when charged by charger. When charging, the current should not be too large. It is recommended not to use fast charging. When charging, please use half of the rated charging current and double the rated charging time. When charging, put the battery into cold water for cooling (the water does not reach 4 / 5 of the battery). Because the battery releases a lot of heat during charging, if it is not dissipated as much as possible, the electrode plate will be bent and deformed, resulting in damage to the battery . During charging, the plug of the unsealed battery shall be opened and carried out in a well ventilated place away from the fire to prevent accidents caused by hydrogen generated by charging.
The battery voltage of motorcycle is usually 12V. The charging voltage must be greater than the battery voltage before charging. The general formula is 7:6 . According to the formula , the charging voltage of 12V battery is about 14V. Whether it is the charging voltage of motorcycle magneto or the charging voltage of external battery charger.
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