Invacare Xplore lifepo4 Conversion

Power wheelchair board for REAL info!

POWERCHAIR MENU! www.wheelchairdriver.com/powerchair-stuff.htm

Re: Invacare Xplore lifepo4 Conversion

Postby Dan » 01 Oct 2019, 12:51

I have started charging up the cells to give them a test discharge and so far its not going to well. The worst one was only 85Ah discharging at 10Amps, I'm trying it again at only 5Amps. Others have been about 95 Amp hours.
They get a bit hot charging at 30Amps?
Attachments
Discharge.jpg
I'm a dude playing a dude disguised as another dude.
Dan
 
Posts: 379
Joined: 10 Nov 2011, 03:03
Location: Northern Ireland

Re: Invacare Xplore lifepo4 Conversion

Postby Burgerman » 01 Oct 2019, 13:06

If these are 105Ah cells they should be fine charging at 30A. If you worry theres no harm charging slower at say 20A,

And you should get between 100 and 105Ah out. At 10A. Or 5A or 20A...

Shirley had a large shipment. Most gave over 100Ah.
User avatar
Burgerman
Site Admin
 
Posts: 50608
Joined: 27 May 2008, 21:24
Location: United Kingdom

Re: Invacare Xplore lifepo4 Conversion

Postby Dan » 01 Oct 2019, 13:27

I would be happy if they were all around 100Ah or I might be finding out how good the aliexpress 29 day money back guarantee is.
Just in case I'm doing something dumb here are the charge and discharge settings.

I have also uploaded the preset being used.
Attachments
1111 LiFe Charge ONE 90 to 150Ah Cell.PS8
LiFe Charge ONE 90 to 150Ah Cell.PS8
(3.19 KiB) Downloaded 49 times
1111settings.jpg
I'm a dude playing a dude disguised as another dude.
Dan
 
Posts: 379
Joined: 10 Nov 2011, 03:03
Location: Northern Ireland

Re: Invacare Xplore lifepo4 Conversion

Postby Burgerman » 01 Oct 2019, 13:39

Looks right to me.
User avatar
Burgerman
Site Admin
 
Posts: 50608
Joined: 27 May 2008, 21:24
Location: United Kingdom

Re: Invacare Xplore lifepo4 Conversion

Postby Dan » 04 Oct 2019, 11:40

Weill I dropped one of the cells and put a dent in it :cussing I guess thats the end of the road for that cell?
Attachments
11111004_113257.jpg
I'm a dude playing a dude disguised as another dude.
Dan
 
Posts: 379
Joined: 10 Nov 2011, 03:03
Location: Northern Ireland

Re: Invacare Xplore lifepo4 Conversion

Postby Irving » 04 Oct 2019, 13:28

Dan wrote:Weill I dropped one of the cells and put a dent in it :cussing I guess thats the end of the road for that cell?

Not necessarily. Is it still working, does it charge/discharge ok? They are tolerant of some abuse, don't write it off too soon.
C5/6 A (complete)
Puma 40, 75Ah LiFePO4 (pic is on tour @ Whistler, BC)
Puma 40 backup, 73Ah MK (for now)
Spectra Plus (weedy 40Ah MK)
User avatar
Irving
 
Posts: 2100
Joined: 04 Dec 2012, 11:51
Location: NW London

Re: Invacare Xplore lifepo4 Conversion

Postby Dan » 04 Oct 2019, 13:56

Thanks. I charged it up a bit and discharged it and it seems to be functioning OK. I thought there was not much room in there hanged I''m to angry with myself to deal with it now. I will try and fully charge it tomorrow.

Having muscular dystrophy fucking sucks, before I would have had no problem with this sort of thing, now I have to use both hands to be able to lift one cell and I have to rest my arms on the chair's armrest.

Looks like I picked the wrong week to quit sniffing glue.

youtu.be/hd1ciPnTGKg
I'm a dude playing a dude disguised as another dude.
Dan
 
Posts: 379
Joined: 10 Nov 2011, 03:03
Location: Northern Ireland

Re: Invacare Xplore lifepo4 Conversion

Postby Dan » 16 Oct 2019, 13:16

Burgerman is there any chance you can do PL8 settings file for;

Eight of these cells in series. 24V
Two cells in parallel then four of them in series 12V
And a full pack, which I guess is 2P8S
cheers

100Ah lifepo4 cells
I'm a dude playing a dude disguised as another dude.
Dan
 
Posts: 379
Joined: 10 Nov 2011, 03:03
Location: Northern Ireland

Re: Invacare Xplore lifepo4 Conversion

Postby shirley_hkg » 16 Oct 2019, 13:50

For the first charge after assembly, make it @3.485V and balance starts at 3.40V.

YOU don't want the fullest cell lingers at high volt for prolong period.
shirley_hkg
 
Posts: 2852
Joined: 31 Dec 2010, 13:42

Re: Invacare Xplore lifepo4 Conversion

Postby Burgerman » 16 Oct 2019, 18:42

In an ideal world yes, but it confuses people. Also balancing at 3.4 volts balance start can unbalance a pack... So must never be left set to that for subsequent charges.

3.600V Is already lower than the 3.6 to 3.7v (3.650) that the manufacturer says is safe. And most BMS allows up to 3.8 or more in repeated spikes as they slowly balance for hour on hour...
User avatar
Burgerman
Site Admin
 
Posts: 50608
Joined: 27 May 2008, 21:24
Location: United Kingdom

Re: Invacare Xplore lifepo4 Conversion

Postby Burgerman » 16 Oct 2019, 18:50

Burgerman is there any chance you can do PL8 settings file for;

Eight of these cells in series. 24V
Two cells in parallel then four of them in series 12V
And a full pack, which I guess is 2P8S
cheers

100Ah lifepo4 cells


Are you wanting to charge a 200Ah 24V pack?
User avatar
Burgerman
Site Admin
 
Posts: 50608
Joined: 27 May 2008, 21:24
Location: United Kingdom

Re: Invacare Xplore lifepo4 Conversion

Postby Dan » 16 Oct 2019, 19:02

Burgerman wrote:Are you wanting to charge a 200Ah 24V pack?


Yes a 24V pack made out of 16 100Ah cells. They are more like 95Ah.

And also settings for 8 cells in series, in case I just decide to make an add on pack out of 8 cells.
I'm a dude playing a dude disguised as another dude.
Dan
 
Posts: 379
Joined: 10 Nov 2011, 03:03
Location: Northern Ireland

Re: Invacare Xplore lifepo4 Conversion

Postby Scooterman » 16 Oct 2019, 19:03

When balanced at 3.6V I then switch to from charge to discharge and take a couple of Ah out of the pack (to pull the voltage down).

That's if I charge in the evening and won't be using the mob device until the next day.
User avatar
Scooterman
 
Posts: 2462
Joined: 03 Jul 2016, 10:11
Location: Wessex

Re: Invacare Xplore lifepo4 Conversion

Postby Burgerman » 16 Oct 2019, 19:19

Wise move. If not using longer, take out 10Ah. If not using for a week, take out 1/3rd the packs Ah.

Now, dans presets...
Charge each CELL individually with the single cell preset, BEFORE assembly.
Then use the 100Ah or the 200Ah preset to charge with balance wires connected.
Attachments
LiFe Charge ONE 90 to 200Ah Cell.PS8
(3.19 KiB) Downloaded 48 times
LiFe Po4 8S w Bal 100Ah 130mA End.PS8
(3.19 KiB) Downloaded 46 times
LiFe Po4 8S w Bal 200Ah 260mA End.PS8
(3.19 KiB) Downloaded 43 times
User avatar
Burgerman
Site Admin
 
Posts: 50608
Joined: 27 May 2008, 21:24
Location: United Kingdom

Re: Invacare Xplore lifepo4 Conversion

Postby shirley_hkg » 17 Oct 2019, 02:24

shirley_hkg wrote:For the first charge after assembly, make it @3.485V and balance starts at 3.40V.

YOU don't want the fullest cell lingers at high volt for prolong period.

:wave:

" It is meant for the FIRST charge only .
It hasn't completed yet. Change it back to 3.6V, and finish the rest of the charge. "


Burgerman wrote:In an ideal world yes, but it confuses people. Also balancing at 3.4 volts balance start can unbalance a pack... So must never be left set to that for subsequent charges.

...
shirley_hkg
 
Posts: 2852
Joined: 31 Dec 2010, 13:42

Re: Invacare Xplore lifepo4 Conversion

Postby Dan » 23 Oct 2019, 13:14

Is 10MM2 70Amp cable OK for connections between the cells?

10mm2 70Amp Thinwall PVC Cable.
I'm a dude playing a dude disguised as another dude.
Dan
 
Posts: 379
Joined: 10 Nov 2011, 03:03
Location: Northern Ireland

Re: Invacare Xplore lifepo4 Conversion

Postby Irving » 23 Oct 2019, 13:26

Dan wrote:Is 10MM2 70Amp cable OK for connections between the cells?

10mm2 70Amp Thinwall PVC Cable.


Yes, keep it as short as possible while leaving some slack for flexing.
C5/6 A (complete)
Puma 40, 75Ah LiFePO4 (pic is on tour @ Whistler, BC)
Puma 40 backup, 73Ah MK (for now)
Spectra Plus (weedy 40Ah MK)
User avatar
Irving
 
Posts: 2100
Joined: 04 Dec 2012, 11:51
Location: NW London

Previous

Return to Everything Powerchair

Who is online

Users browsing this forum: rover220, shirley_hkg and 15 guests

 

  eXTReMe Tracker