Amylior R3

[BCrip71]

Can you fly with them?

Can I charge through my joystick?

[Burgerman]

Well if you cant then the ones you were planning to buy or the bounder ones are the same problem.

But as many here keep saying, and many have and did fly, including lenny recently to london, it SHOULDNT be a problem. As any battery that is permanantly installed isnt subject to the same rules. It must be disconnected physically thats all. So an anderson loop is the easiest way. But ground baggage handlers are not hired for their intelligence. So its down to luck. But flying any chair is...

[shirley_hkg]

Can I charge through my joystick?

Yes.

[Burgerman]

Can I charge through my joystick?

Yes.

Albeit you will need to have a BMS installed, as well. And at a max of 12A which is mighty slow when you need charge a discharged 230Ah battery. 19.5 hours! At 8A with a stock wheelchair charger thats almost 30 hours...

[shirley_hkg]

Can you fly with them?

I supposed it was on vacation, that he could fill it up 80ah, every night with stock charger.

[BCrip71]

Would this fit?

https://thecabindepot.ca/collections/ba ... epo4-100ah

[Burgerman]

No. Page loaded, then disappeared... But its too long, doesent have the current capability, and when you exceed it the thing needs "resetting" as its BMS cuts off power. By applying a charger.

[BCrip71]

What dimensions should I be looking for?

[Burgerman]

GRP 24 ones, your chair has 2.

They take up this space, shown here with 230Ah cells x 8.

260 long, 170 wide, 220 tall. Permobils are problematic with height and the terminals aparently, I dont have one, and so as shown here the shorter height 160Ah cells must be used instead. Amy? Dont know.

For drop in bricks, you need 2x 12 or 24v grp24 sized ones. And measure first, twice, before ordering anything...

But its not he only thing to look at. You need to be able to take up to 240A peak, for a couple of seconds too or the bms those things use will chop off power... Like a switch.

[BCrip71]

I'm confused. What size would one 24v battery need to be?

[Burgerman]

One wont fit. Or it will waste half the space. Battery area is almost square. 340 x 259mm. As drawing.

You need TWO 24v, or TWO 12v.

[BCrip71]

How do these batteries look?

https://volthium.com/en/produit/12v-130 ... 94QAvD_BwE

[Burgerman]

They have all the same issues that a typical 1 size fits all BMS has that isnt really needs. But at 130Ah thats enough to make to swap worthwhile.
With a couple of provisos...
129MM TALL is a bit taller than most grp 24s are. And that does not include the terminals or the bolts. So IF theres enough room.
And the usual one.

DISCHARGE SPECIFICATIONS
Continuous discharge current 100 A
With a few secs at 200.

Well a chair driven by my granny with stock programming would be fine at this level. And never pull more than say 60Amps.
But I know that I can make my 2x 120A R-net system pull 120A per channel, so more than double this occasionally with it programmed to go and steer and driven like I stole it. Not everyone does that...

So it wouldnt work for me, the BMS would keep on chopping off the power until it was reset. Will it work for you?
Only you can know how you use it! How its programmed? Maybe it will be fine.

I didnt see a price. But its only half the capacity of doing it with seperate cells at a 244Ah (measured) diy setup @ 560 us dollars?
So I would not expect it to be a realistic price! But I cant tell. Is it better than lead, yes. If it fits. If it doesent cause issues with BMS.
If it were me I would get a shirley ZTE ZXD POWER SUPPLY TO PROPERLY CHARGE IT and dont rely on some junk or a mobility charger.

So if you are going to do this make sure that they will actually fit! And that they will take them back if they start cutting out on ramps or big slopes or while accelerating at max power.

But I think they should be OK. You will get double the range, with 20 Ah remaining. Which you shouldnt use... Thats the just in case bit.

[Burgerman]

Now I saw the price! About 2 grand us! Thats overpriced by 8x or 800% (Ah per Ah) compared to fitting a set of 230Ah cells.

That to me is mental. But I can do it myself, and double the AH. The question is what is that worth to you? If you wont or cant DIY then you have no choice.

[BCrip71]

They have all the same issues that a typical 1 size fits all BMS has that isnt really needs. But at 130Ah thats enough to make to swap worthwhile.
With a couple of provisos...
129MM TALL is a bit taller than most grp 24s are. And that does not include the terminals or the bolts. So IF theres enough room.
And the usual one.

DISCHARGE SPECIFICATIONS
Continuous discharge current 100 A
With a few secs at 200.

Well a chair driven by my granny with stock programming would be fine at this level. And never pull more than say 60Amps.
But I know that I can make my 2x 120A R-net system pull 120A per channel, so more than double this occasionally with it programmed to go and steer and driven like I stole it. Not everyone does that...

So it wouldnt work for me, the BMS would keep on chopping off the power until it was reset. Will it work for you?
Only you can know how you use it! How its programmed? Maybe it will be fine.

I didnt see a price. But its only half the capacity of doing it with seperate cells at a 244Ah (measured) diy setup @ 560 us dollars?
So I would not expect it to be a realistic price! But I cant tell. Is it better than lead, yes. If it fits. If it doesent cause issues with BMS.
If it were me I would get a shirley ZTE ZXD POWER SUPPLY TO PROPERLY CHARGE IT and dont rely on some junk or a mobility charger.

So if you are going to do this make sure that they will actually fit! And that they will take them back if they start cutting out on ramps or big slopes or while accelerating at max power.

But I think they should be OK. You will get double the range, with 20 Ah remaining. Which you shouldnt use... Thats the just in case bit.

Thx!

[BCrip71]

Can you explain continuous discharge a bit further? What is the continuous discharge of MK gel batteries?

[Burgerman]

The rate in Amps that the motors pull power from the battery.

Which mostly depends on how you drive it, and programming, and hills...

Max on my own chairs is everything that the 120A R-net control syystem is capable of giving! Because I wheelie, and have everything wound up to 100 in programming so that the thing jumps to attention. And then I use the joystick angrily! I drive it like I stole it all the time even indoors.

So I take the max 120A per motor, 240A total quite regularly for a couple of seconds at a time. MOST of the time, such as when rolling fast the current is much much less.

[BCrip71]

Is this different for gel batteries?

[Burgerman]

It has nothing to do with the battery. The current is determined by the chair, the programming and the driver. The batteries must provide this.
A BMS tries to protect fragile lithium cells by not allowing this... By chopping off the power.

So we generally fit BIGGER ah cells. as then supplying this current doesent damage them. And so we dont need or want a BMS to preotect the cells from the chair...

Hence my 230Ah cells. Perfect.

Lead batteries dont care.

[BCrip71]

Ah, ok. I understand.

[Burgerman]

If you dont behave like I do you should be OK. But dont blame me if its not!