Recent content by GGoodrum

I started a for sale thread over here: http://endless-sphere.com/forums/viewtopic.php?f=31&t=34495#p501227 Everything is in stock, and all orders from this point will ship out the same day the order is received, if it is before about 3:00 pm PST. -- Gary

I started a "for sale" thread for the BMS Lite kit combos here: http://endless-sphere.com/forums/viewtopic.php?f=31&t=34495#p501227 Everything is in stock, and the kits will go out the same day they are ordered, from this point forward. :) The full-size Zephyr boards/kits will be available...

Yes, both the Lite, and the full Zephyr circuits will automatically balance even a grossly imbalanced pack. The difference between the two is simply the amount of time it takes. The full Zephyr circuits have shunts that will bypass about 600mA of current, while the Lite boards will bypass about...

I have started offering the "Lite" version, which uses 6-channel or 8-channel boards that can be embedded in with the packs, and uses a separate charge controller that is mounted in a small box, but these are really geared towards LiPo setups because each of these boards also acts as a parallel...

Actually either the "N" or the "C" version will work fine. The ones I have here are the TC54VN3002EZB-ND. Yes, the total charge voltage needs to be at least 49.8V. You can go higher than that, but then the HVC-based power cycling will kick in more often, at the end, so it could take longer to...

Yes, you could simply change out the TC54 detectors for ones that are slightly lower. Normally, we use the 3.0V versions for LiPo, but this is for "under load" conditions. As soon as the load is removed, the "resting" voltage will recover up to about 3.3-3.5V. For LiFePo4, we use the 2.1V chips...

Yes, there's two part changes, one of the resistor arrays, and then the lower voltage TC54 detector chip is used. -- Gary

Yes, the idea is that these boards can be co-located with the packs, and shrink-wrapped, if desired. I actually build all my packs this way, and have been doing it for awhile now. Here's a shot of one of my 12s2p 44V/10Ah packs: This one has embedded LVC/HVC boards, from the older versions...

I'm sorry that I haven't posted much here, but I have been busy, nonetheless. :) I did have a delay for a week, or so, while I did a consulting project, but that is complete. Anyway, I'm ready to at least start offering full kits for the 6s and 8s Embedded BMS "Lite" boards and the standalone...

Yes, that is correct. The charge controller basically just goes inline, between the charger and the pack. Still working on the instructions. As soon as I get them done, I'll start taking orders. :) -- Gary

Yes, you can easily do this. I have my 12s2p pack apart, at the moment, I'll post some pics of this, with the embedded boards, as soon as I can. I'm working on the assembly instructions, as I go. -- Gary

Okay, I think we are just about ready to go with these. I now have new boards, both in 6s and 8s versions. Testing is complete, and the resistor values we've been tweaking are dialed in now.These will be offered with three different options, PCBs-only, with a BOM and build instructions; a...

This so-called "smart" BMS is typical of the import designs, which have low balance currents, and have a discharge limit. You can, of course, simply bypass the output FETs, and maybe figure out how to tap off a signal that could be used to pull down the throttle signal, or you could simply use...

Early next week.

Here is what will be available first. It is the latest version of our Zephyr BMS "Lite" design, in an embeddable form. The PCB below shows both 4 x 6s4p and 2 x 8s4p boards per PCB and the new standalone charge controller, which goes in its own small box. These are complete BMS boards, not just...