Im working on a project and I have a volt meter hooked up to the circuit to tell me the voltage of the pack. I need to know at what voltage can i safely bring my lead acid battery pack down to without causing damage to the cells. Thank you.
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it depends on the lead acid cell construction. There are deep discharge types, such as are used in marine batteries, that can be totally discharged without damage. Automobile types, however, cannot take more than about a half discharge without damage.
It also depends on the load current, which will change the voltmeter reading, specially as you get closer to discharge. It also depends on the temperature.
IF you have deep discharge types, and measure the voltage with no current flowing, and the temperature is close to 20ºC, then for a 12 volt battery, full charge is 12.7 volts, full discharge is 11.7 volts, half discharge is 12.5 volts. Multiply by 3 for a 36 volt battery.
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It also depends on the load current, which will change the voltmeter reading, specially as you get closer to discharge. It also depends on the temperature.
IF you have deep discharge types, and measure the voltage with no current flowing, and the temperature is close to 20ºC, then for a 12 volt battery, full charge is 12.7 volts, full discharge is 11.7 volts, half discharge is 12.5 volts. Multiply by 3 for a 36 volt battery.
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generally, a 10% difference iallowed, SO,
36 - 36*10/100 = 36 - 3.6 = 32.4 volts
You Should NOT allow lower than 32.5 volts. >======< ANSWER
36 - 36*10/100 = 36 - 3.6 = 32.4 volts
You Should NOT allow lower than 32.5 volts. >======< ANSWER