Lifestand LSCO conversion to lithium

[Irving]

If I lay them flat and stack them depending on the battery I can get 135 to 165 ah

Your best option is:

8 x 175Ah 174 x 40 x 205mm laid on their side will be 2 x 174 long, 170 high inc insulation, 215 wide inc wiring, so will fit in a 2 x GP34 footprint

what did you use for installation Irving?

I haven't yet, but thats probably theroute I'm going. I'd like to do 210Ah (16 x 105Ah) but its a really tight fit in the Puma and I don't have the necessary 210mm height unless I raise the seat fixture to its higher setting, but I like being able to get my knees under tables! As it stands i have about 178mm height so the 176Ah solution is the safer option. Also the Puma battery tray is only just 260mm wide internally and 2 x 105Ah are 261.5 - 263mm with insulation...

[Burgerman]

Trust me. Even 150 real Ah is going to surprise you! Compared to the olde worlde 60ah lead ones you take out.
Those give you 30 to 35 Ah when new before you stop.

Its not 2x as good. Its not 3x as good. Its not 4x as good, its more! You might notice that!

[funkykeyboard]

so this is what the battery box looks like on a lifestand wheelchair. I'm only able to fit the battery cells in, one block of 5, and one block of 3.

So thanks to Irvings suggestion I have made a cell insulation/box.


With a glue gun and this
https://www.ebay.co.uk/itm/8-x-4-x-2mm-solid-PVC-Hygienic-Cladding-Plastic-wall-sheets-in-white/254154363289?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649


Really pleased with that. A bitter Velcro on the bottom and they will travel 0% in the battery box. With no travelling the batteries going to use the busbars, with the soldered connection between the block of 3 cells and the block of 5 cells. Which means I should be able to Shorten the balancing/charging cables to the absolute minimum.

Any advice appreciated, Tremulous Tetra. :-)

[Burgerman]

That covers the bottom too right?

[funkykeyboard]

That covers the bottom too right?

yes it does mate.

The battery compartment in general is bone dry anyway, never gets any moisture in it. However, I water tested the battery boxes, and there is slight water leaks here and there. I don't need to seal them do I?

Also, the lid will be these(if they fit, if they don't there are bigger ones out there I will get).
https://www.ebay.co.uk/itm/Reusable-Silicone-Stretch-Lids-Bowl-Cover-Seal-Cover-Storage-Saving-BPA-Free-2-T/372994741668?ssPageName=STRK%3AMEBIDX%3AIT&var=641780952236&_trksid=p2057872.m2749.l2649


More importantly, is the wiring diagram Here correct? http://www.wheelchairdriver.com/board/viewtopic.php?f=2&t=9744&p=157795#p157795

Any advice appreciated, Tremulous Tetra. :-)

[Burgerman]

No.

[funkykeyboard]

Okay, we are getting there. Wired everything up like this. Though the cable that connects the black/positive terminal on cell 3 to the grey/negative terminal on cell 4, is just temporary. I am going to replace that cable with 12 or 10 AWG. Does it matter which? Should it be thicker 6?

Still haven't attached the negative cell 1 and positive cell 8 main charging cables yet.

[biscuit]

Funkykeyboard are you sure about that polarity? Electrics isn't like bookkeeping. Negative is usually black in electrical things afaik.

The PL8 gives an error message (as I know from when I connected a cell to the PL8 the wrong way round ). But I don't suppose that is how to test properly, waiting for the charger to spot the mistake.

[shirley_hkg]

Not sure if the leftmost red wire should go to the second right pin or not for Hyperion , I suppose the last blue wire should go to the first pin of socket B instead.

[funkykeyboard]

Funkykeyboard are you sure about that polarity? Electrics isn't like bookkeeping. Negative is usually black in electrical things afaik.

The PL8 gives an error message (as I know from when I connected a cell to the PL8 the wrong way round ). But I don't suppose that is how to test properly, waiting for the charger to spot the mistake.

I know, me and the other fella doing this are like WTF "how can black be positive". However, the black has a positive symbol on it, and the grey has a negative symbol on it. Plus we have checked the polarity with a multimeter. So as inconceivable as it seems, in this case, with these batteries, black is positive and great is negative. Thanks for doublechecking me anyway.

Any advice appreciated, Tremulous Tetra. :-)