deep discharge cut off lead acid 6v

[myfaithnka]

hi all,

pls suggest me a method to cut off the 6v,4.5 ah battery form service at a voltage of 5 V.

I am looking for non relay circuit.

thanks.

 

[crutschow]

What's the maximum load current?

 

[tpetar]

hi all,

pls suggest me a method to cut off the 6v,4.5 ah battery form service at a voltage of 5 V.

I am looking for non relay circuit.

thanks.

Versatile Micropower Battery Protector - Silicon Chip 27 July 2004
https://www.learningelectronics.net/circuits/versatile-micropower-battery-protector.html



Best regards,
Peter

:wink:

 

[myfaithnka]

What's the maximum load current?

it should be 3 A. at maximum.

 

[tpetar]

Read battery datasheet for maximum allowed current and expected battery capacity according to draining currents.

 

[myfaithnka]

maximum amperage is 2.3 A. I measured it.

 

[BradtheRad]

This method has an op amp switching an NPN transistor on and off. It does not use a relay.



If the op amp is a 741, then the output will not go all the way down to 0V with a single supply. Some experimenting may be needed with the bias network (example, diode in series, pull-down resistor, etc.).

 

[pardner]

I would make that 1K resistor a little bigger. If he zeros out the pot, that puts a 1K load across the batter at all times. A constant 6mA is going to kill the battery in 30 days.


You might want to put in a latch. When you disconnect the battery from service the voltage will rise..... enough to turn on the load again.

 

[tpetar]

Lead acid battery should not stay in discharged state, semi-discharged state or any state below full state, and look to recharge it in 24h time cycle.

 

[myfaithnka]

Hi all,

what is your opinion about this circuit.