Recent content by BabylonFive

Just watched your channel -- was interesting.I am also making my own solar-recharged battery pack and glad of the extra knowledge, but agree it's a lot of work and has its risks and challenges. PS also in Texas (Austin area)

Awww that's cute. My thirty-two 205Ah will make the equivalent of a 12V 1650Ah battery -- it's organized as 410Ah 48V for higher efficiency. My LV6548 will charge it at 8kW and supply the 120VAC at 6000W. Built-in transfer switch, current sensor, voltage and temp cutoffs, MPPT charger, and 6kW...

Yea the studs are stainless. I will also look for those aluminum washers (or even copper ones?) to equalize the base of the contact proper to the lower contact area. It's laser welded so its not really smooth.

OK, that is interesting. If the phase-change material had a reasonable latent heat, yet also was a pretty good insulator, then it might be an interesting temperature-driven automatic cooler. The processes of conduction and convection don"t necessarily have to be shared -- by this I mean that a...

It sounds like if the temp thresholds were set correctly the batteries would stay at minimum charging temp and then self-heat once charging started and no longer need the heaters until they completed charging and then began to drift back down. Insulation is then key to keeping the heat inside...

I'm missing what the downside would be to having a rubber pad or pads? Not necessary, but no negatives?

I did finally receive them, and they are very pretty. The screw posts are smaller than expected (M6 screw) and are laser welded to the main posts, so I'm a big worried about pulling over 100A against that top surface. <sigh>

I think you mean to avoid 0603 not 0602, but they are just possible with a pair of small irons. 0402 and smaller are wildly impossible for anyone but a pro..

I'm having some similar concerns over my own first battery box. When you heavily charge and discharge, your batteries (and conductors) will generate heat, and especially in hot conditions (I'm in Texas) this is a bad thing -- you'd want to ventilate. When you are camping in a cold condition...

Since I never saw anyone say this: Mosfets are also never as good a connection as a contactor would provide, but a contactor requires continuous current to keep it connected, even if nothing downline uses the current (provides voltage at very very low current). The benefit of a magnetic latching...

I paid about that rate for 32 cells. My setup will be in an RV, so I'm worried about shock and vibration. Looking at some foams for vibration deadening inside the box, or around the box. In your case with light loads and light charging, insulation makes sense; but, with higher loads and larger...

What happened with these batteries and the installation? Inquiring minds!

Quick question: Your list at the beginning showed you used latching main power relays, presumably to make the load and/or charging connections without FET heating. Is that true, and how did you integrate these with the existing BMS? Adjunct question: are there any BMS models that work with an...

Haven't received my Lishen cells yet. Still waiting.

Very nice. I have been thinking the same thing about how batteries in the hot need cooling, but batteries in the cold need insulation. Fans controlled by temp can help control that system. Very nice. My box will be a little bigger, as I ordered 32.