Battery Substitute

[4pyros]

I what to get a battery substitute power supply for converting a cordless impact driver, Ryobi
P230 Like this;
https://www.amazon.com/Ryobi-P230-18-Volt-4-Inch-Impact/dp/B0021QMLUS
to a corded unit.

Anyone care to guess how much current this will need to run as well as if it had the NiCad battery.

I can not find anything relating to current or power for the driver or the NiCad battery on the manufactures web site. The one thing I do know is the battery pack has 15 sub "C" sized NiCad cells in it.

Thanks Andy

 

[ronv]

Might want to measure the motor resistance to see the stall current. It looks like a brute! Could easily go 10 amps.

 

[4pyros]

I can not find the max current a sub "C" can put out. Any ideas?

 

[Reloadron]

Typical NICAD sub C can be anywhere between 1800 and 2200 mAH. So it becomes a matter of seeing how the battery pack you have is configured. That would be my guess.

Ron

 

[Gobbledok]

I can not find the max current a sub "C" can put out. Any ideas?

Hi 4pyros not sure which type you had in mind but **broken link removed** NiMh Sub C can discharge at over 40A!

It is a high-discharge model and probably not indicative of the norm.

 

[Reloadron]

Hi 4pyros not sure which type you had in mind but **broken link removed** NiMh Sub C can discharge at over 40A!

It is a high-discharge model and probably not indicative of the norm.

Yeah, but it is a nickel–metal hydride cell, and not a NICAD battery. I believe 4pyros is looking to substitute a NICAD battery pack using a mains supply. Hell of a battery though.

Ron

 

[Gobbledok]

I believe 4pyros is looking to substitute a NICAD battery pack using a mains supply.

LOL yeh got a bit carried away I did. I saw the 40A and had to tell someone.

 

[4pyros]

Typical NICAD sub C can be anywhere between 1800 and 2200 mAH.

I have seen discharg ratings from 2C to 10C so thats a rang of 3.2 amps to 22 amps. Just wish I had the ratings on the packs Ryobi is making.

 

[kinarfi]

I saved one of the battery case for my Ryobi 18 v drill and rigged it so I could hook it to my 20 amp power supply, 20 amps is not nearly enough when you start needing torque, so I would guess a 40 amp @ 18 volts supply might work.
Kinarfi

 

[4pyros]

so I could hook it to my 20 amp power supply

Was that a regulated supply or unregulated?

 

[Nigel Goodwin]

Might want to measure the motor resistance to see the stall current. It looks like a brute! Could easily go 10 amps.

Greatly more then that!

 

[4pyros]

On Monday I will do some tests and measurements on the impact driver at work.

Any bets as to the peak currents?