Recent content by MidniteTweeker

In the interest of trying to keep things neat and hopefully less likely to short, I'll use resistors instead of bulbs. Figure I can attach them to a piece of wood or something & alligator clip from there to the cell(s). Resistors & clips on order now. If only I hadn't gotten rid of all my...

OK, I didn't realize that the shunt resistor was left in place during charge. Thought that it was used to drain down a cell after being charged. So conceivably you could have a shunt resistor on 11 of the 12 cells in the pack while you're waiting for the 12th cell to catch up?

Yeah, the recent readings were not taken while charging. So I put the 6S2P banks on the RC charger one at a time with it set to charge, not balance. Plugged the balance meter into the JST plug and recorded the cell voltages. Cell # Balance meter volts % of charge per balance meter...

I guess I'm not clear on the function of the BMS. Or else I'm not clear on the function of my RC balance charger. Or else I'm not clear on the differences between LiPo and LiFe. I thought that a balance charger would automatically bleed voltage from a high cell while still bringing a low cell...

Cells 15/16 have been on the charger for ~5 hours and ~12 a-h delivered. Now showing 3.32 volts, 57% charge, compared to 3.22 and 10% charge when they began. Here's the current status of the pack: Cell # Balance meter volts % of charge per balance meter 9/30/2013 1, 2 3.43...

If I try charging 15,16 while they're still connected to the BMS through the balance leads and still connected to their neighboring cells by their electrical straps, are there sneak paths that will result in other cells receiving the charge in addition to 15,16? To me it seems that the...

After being taken out of storage the entire pack of 24 cells had been charged overnight using the charger and BMS that came with the pack. Then it had been used lightly over a 3 day period, drawing probably not more than 5 a-h total before it suddenly cut out going up a hill. (Recovering from...

Cell # Balance meter volts % of charge per balance meter 9/25/2013 1, 2 3.496 95 3, 4 3.454 93 5, 6 3.333 66 20.42 bank total, 90% 7, 8 3.409 90 9, 10 3.431...

Finally. As of about 1/2 hour ago I finished wiring in the new balance wires, JST plugs and charge wires so I can charge it as two separate 6S2P batteries using my RC charger to both charge and balance. The first 6S2P bank showed a 78% charge when put on my charge meter. After spending 2...

I chose cells 13 and 14 to charge separately as a 1S2P arrangement. Starting voltage around 3.22. Began by setting the charge current to 4 amps for no particular reason. Hours passed with the charger timing out every so often. I recorded the individual mah readings each time but due to a...

Verifying calibration to NIST standards wouldn't be easy, but I grabbed a second meter which should be better quality than the first. Readings below: 9/16/2013 Cell # Meter #1 Meter #2 1, 2 3.68 3.66 All readings taken while charging 3, 4 3.66 3.65 5, 6 3.33...

After seeing how out of balance the pack is from using this BMS I'm seriously tempted to do exactly that---install the necessary JST plugs plus a set of +/- Powerpoles for charge leads on each 6-cell group and charge them off my iCharger. I just ordered some 7-wire JST plugs but in the meantime...

Right now the total pack voltage shows 41.8 while on the charger. Out of curiosity I disconnected the charge plug and read exactly zero volts coming from the charger. Unplugged and replugged it from 120 vac & no change. Does it require connection to a load that the meter does not provide in...

These are for each pair of cells. 1, 2 3.68 All readings taken while charging 9/16/2013 3, 4 3.66 5, 6 3.33 7, 8 3.62 9, 10 3.69 11, 12 3.29 13, 14 3.22 15, 16 3.22 17, 18 3.67 19, 20 3.33 21, 22 3.69 23, 24 3.33 During this...

So when you say "cell", do you mean a pair of cells? If that's the case I can get readings in a few minutes. It's on the charger right now. If you mean individual cells, I'm not quite sure how that would be done. MT