How important is it to load test or charge-then-load test replacement modules for the hybrid battery? If they've been sitting for a week or more, disconnected, wouldn't that be sufficient to suss out modules that self-discharge too quickly? Or not?
Lol, more than 100 amps travels through these modules at times when they're in the car... The standard load test of a 12v 50w bulb for 2 minutes draws barely 3% of that amp load. How in the world could that be damaging?
It gives you more data to add to the spread sheet to better predict which modules are weakest... Add to load testing, the self discharge test a few days or longer after full charge and balance, as well as using thermal camera to find hot cells, as well as getting readings from pack at each stage of the reconditioning process and you'll soon have a spreadsheet that points to which modules to replace first.
Concur with PriusCamper. I can say with confidence that without a load test, you are flying blind. I hope to find time soon to show the results of my varied tests and outcomes. Even a two minute 2 x ~55W headlight bulb test is a very minimal test. Thought experiment: * Each module has nominal capacity of 6500 mAh == 6.5 AH * 2x headlight bulbs draw nominal 110 watts at 12 volts. That's "hot" (glowing) power/resistance. As long as it's still hot, resistance is approximately constant. power P = V*I (Volts * Amps), so ~9.17 Amps. And V=I*R so resistance is ~1.3 ohms. Whew. One more: I = V/R, so by shifting to 6-8 volts module voltage, the setup is drawing ~4.6 to 6 Amps. That's a small fraction of full power. * A two minute test thus uses at most 12 amp-minutes == 200 mAh. NOT an issue for a good battery.
