Recent content by ev99saturn

It may be garolite g10/fr4. A good choice with battery boxes, it's very strong and an insulator. You can find it here: http://www.mcmaster.com/#grade-g-10/fr4-garolite/=kwtxtb

Yes, they are packs for a car. There will be 8 total, I am building #6 at the moment. The car is quick with the first 3 installed. These cells really deliver.

Not sure if your question is for izeman or me, but I am building 12S4P packs.

You can use a length of copper wire as a resistive load. 12 gauge wire is is 1.588 ohms per 1000 feet, so 69 feet of it would draw about 30 amps at 3.3V, and of course a bit less with the voltage sag that current level. Shorter lengths will heat up quickly. To pull more current, use...

You might try to improve those solder joints on the power mosfets. Or are they soldered ok to etches on the bottom of the board? A few of them look cold; for example the top leg of Q1B, and the middle leg of Q1D. That could make an intermittent problem like in your video. The solder...

The finished packs will add up to about 24.4 kWh at 100% DOD. The car is the one pictured in my avatar, a 1965 AC Cobra replica kit car. It has a TransWarP 11HV motor, a NetGain Controls 360V/1400A controller and with the completed packs will run at 350 kW. The 28S3P and 7S3P packs were...

The car is a new build and the 1000 amp limit is only temporary until the motor brushes are fully seated, then it goes up. 96S4P provides the planned amps and is also the right mix of volts, physical pack size, weight and range for this car. 3P is not quite enough amps. I was not aware...

I purchased 400 cells from OSN in january 2012. They are all full tabs, all new, and have been testing out quite well. The capacity of each cell ranges from about 18.8 to over 20 Ah, with the average about 19.3 Ah. I am still building up packs, and have seen no failures yet. 3 out...