Hi, electronics newbie here with a tough one! (Or a dumb one?)
I want and need to build a current limiting circuit, which needs to be relatively small (sub 7x7x7cm) and able to limit high power draw - Up to around 3200W - To stop my batteries (2S Li-Po) from delivering more than 190A at 8.4-7.4V. I would like for them to be able to deliver freely from 0.000---1A-190A, but not higher.
About the application: It's going to be used in an RC boat. I'm running a 31-inch 3.5Kg ( <-- Nevermind the hull aspects) boat with an ESC rated for 80A at 6S (Li-Po serial configuration - 3.7V x 6 theoretical, 4.2V -3.7V x 6 in practice). The problem is that it draws way more Amps than it's rated for... A few months ago I ran it with two 3S Li-Po's, in series, capable of delivering 125A continuous each - And both batteries were subject to Amp draw over 125, so they puffed (were damaged and rendered useless). This is because the boat jumps in and out of the water due to it's weight, scale and speed (50mph+) paired with the size of normal inland waves, which lifts the propeller in and out of the water, massively changing the draw of current in short periods of time.
So I need a current limiting circuit for my batteries, preferably between the batteries and the ESC.
At this point, I need to limit
Addendum for the interested: Boat: ProBoat Impulse 31 V2. Boat Specs Link | Video Of The Boat (NOT my property) | Battery To Limit (Specs)
I've considered fuses... But I can't find any with appropriate specs, nor would they be practical. I've also considered just using a resistor - but I can't find one capable of the potential power dissipation... I've looked at power limiting circuits - but haven't found one able to limit such amperage...
I hope I managed to explain this at least somewhat efficiently... Thanks in advance for any help!
I want and need to build a current limiting circuit, which needs to be relatively small (sub 7x7x7cm) and able to limit high power draw - Up to around 3200W - To stop my batteries (2S Li-Po) from delivering more than 190A at 8.4-7.4V. I would like for them to be able to deliver freely from 0.000---1A-190A, but not higher.
About the application: It's going to be used in an RC boat. I'm running a 31-inch 3.5Kg ( <-- Nevermind the hull aspects) boat with an ESC rated for 80A at 6S (Li-Po serial configuration - 3.7V x 6 theoretical, 4.2V -3.7V x 6 in practice). The problem is that it draws way more Amps than it's rated for... A few months ago I ran it with two 3S Li-Po's, in series, capable of delivering 125A continuous each - And both batteries were subject to Amp draw over 125, so they puffed (were damaged and rendered useless). This is because the boat jumps in and out of the water due to it's weight, scale and speed (50mph+) paired with the size of normal inland waves, which lifts the propeller in and out of the water, massively changing the draw of current in short periods of time.
So I need a current limiting circuit for my batteries, preferably between the batteries and the ESC.
At this point, I need to limit
- Two 2S Li-Po's in series with limit 190A at voltages 16.8-14.8 (Limiter after serial connection)
- Each separate battery - one limiter hooked up to each battery before the serial connection, able to limit to 190A with voltages 8.4-7.4
Addendum for the interested: Boat: ProBoat Impulse 31 V2. Boat Specs Link | Video Of The Boat (NOT my property) | Battery To Limit (Specs)
I've considered fuses... But I can't find any with appropriate specs, nor would they be practical. I've also considered just using a resistor - but I can't find one capable of the potential power dissipation... I've looked at power limiting circuits - but haven't found one able to limit such amperage...
I hope I managed to explain this at least somewhat efficiently... Thanks in advance for any help!