Since charging rate is inversely proportional to the time, we have:
Simple battery monitor circuit full#
The unit Ah is there only to provide us with a benchmark value which can be used for knowing the approximate charge/discharge time of the battery at a stipulated current rate.įor example when the above discussed battery is charged at 10 ampere rate, using the Ah value we can find the full charge time in the following formula: Likewise, if the battery was discharged at 100 ampere rate, the backup time would last not more an hour.īut wait, never try this, as charging/discharging at the full Ah rate can be disastrous for your lead acid battery. For example, if a 100 Ah battery was charged at 100 ampere rate, it would take 1 hour for the battery to get fully charged. The unit Ah or Ampere-hour in any battery signifies the ideal rate at which the battery would be fully discharged, or fully charged within a span of 1 hour. UPDATE: You may also want to build these simple Charger circuits for 12 V 7 Ah Batterie s, check them out. The 5 useful and high power lead acid battery charger circuits presented below can be used for charging large high current lead acid batteries in the order of 100 to 500 Ah, the design is perfectly automatic and switches of the power to the battery and also itself, once the battery gets fully charged. Lead acid battery charger are specifically designed for charging heavy duty batteries through specialized control circuits. To charge these batteries we specifically need chargers rated to handle high ampere charging levels for long periods of time. Lead acid batteries are normally used for heavy duty operations involving many 100s of amps. All these designs are thoroughly tested and can be used to charge all automotive and SMF batteries up to 100 Ah, and even 500 Ah.
This article explains a few lead acid battery charger circuits with automatic over charge, and low discharge cut off.
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