PINNED - Lithium battery conversion/info

[Burgerman]

Its a SM3040 30V set to anything from 12 to 28 depending on what I am doing.

I bought those on eBay, they periodically come up as "refurbished" or demo units. Cheap. I bought one demo, one refurbished. Both were effectively new in box with new cables etc all sealed up in polythene. I think they are "back door" units. Nobody pays the silly full price.

Also they are called mastech, digimess, grundig, and other names. Same thing. Different suppliers/countries. There are linear and switch mode ones. Different outputs in voltage and current.

[terry2]

Its a SM3040 30V set to anything from 12 to 28 depending on what I am doing.

I bought those on eBay, they periodically come up as "refurbished" or demo units. Cheap. I bought one demo, one refurbished. Both were effectively new in box with new cables etc all sealed up in polythene. I think they are "back door" units. Nobody pays the silly full price.

Also they are called mastech, digimess, grundig, and other names. Same thing. Different suppliers/countries. There are linear and switch mode ones. Different outputs in voltage and current.

Thank you.

Just got to wait for someone to come and take the cells out and put the normal batteries in.

[Burgerman]

All batteries are normal!

You mean lead!

[terry2]

All batteries are normal!

You mean lead!

Yes

My mate just pooped round said that when the PL8 shut off the wires was very hot..

Can I use a XLR charger for the cells?

[Burgerman]

Whats an XLR charger?

I have many chargers with an XLR connector including PL8s. Shirleys power supply/charger. And a lithium charger designed to be used with a BMS with an XLR connector.

Do you mean a 2 wire, 24V powerchair lead charger? Definitely not!

Unless you also fitted a decent high balance current BMS. Which will be a problem either straight away or in a few weeks/months when it fails, or causes charge or operational issues. So if you do that you are headded for trouble!

[terry2]

Whats an XLR charger?

I have many chargers with an XLR connector including PL8s. Shirleys power supply/charger. And a lithium charger designed to be used with a BMS with an XLR connector.

Do you mean a 2 wire, 24V powerchair lead charger? Definitely not!

Unless you also fitted a decent high balance current BMS. Which will be a problem either straight away or in a few weeks/months when it fails, or causes charge or operational issues. So if you do that you are headded for trouble!

You love going on a tangent don't you lmfao.

Hate to talk to you when your drunk

[Burgerman]

No. I am sober. You are baffling. Your level of communication isnt adequate.
An XLR is a CONNECTOR. Its not a charger. As such ANY CHARGER can use an XLR. And loads of lead, 12V and 24V and 36V ones do. Also many lithium chargers use XLR connectors and various voltages.
So you need to be specific.

This for e,g. is a mobility charger for lithium ion:
https://www.amazon.co.uk/Charger-Li-Ion ... B01EYV77YM Its 36 volt too. With XLR connector.

This is 42V lithium ion wheelchair charger. With XLR connector:
https://www.amazon.co.uk/Charger-Li-ion ... ics&sr=1-2

https://www.amazon.co.uk/dp/B08D61BV9N/ ... ics&sr=1-3

54V LITHIUM With XLR connector:
https://www.amazon.co.uk/Charger-Li-ion ... ics&sr=1-8

12V LITHIUM With XLR connector:
https://www.amazon.co.uk/Charger-Batter ... cs&sr=1-12

36V
https://www.amazon.co.uk/Charger-Li-Ion ... 2KVAD6VY3Y

Theres hundreds of them. So no I am not drunk. You make little sense. I am not "going of at a tangent". I am trying to decipher your sentences. The reason we use words is because they have meaning. Not using the right words causes problems when its something technical.

I have here many chargers. And at least 2 lithium chargers. One for a chinese lithium folding chair (24V 1.8A lithium cobalt 7s pack) and one for my 21V 5S lithium mower. Both are XLR.

[Burgerman]

>>>My mate just pooped round
Is he ill?

>>>said that when the PL8 shut off the wires was very hot..
Do you mean failed? As in shorted so high current? The wires are supposed to get hot at high power thats why hey are silicone high temperature cables. I am having to guess you mean its supply wires here.

>>>Can I use a XLR charger for the cells?
Theres no such thing as an XLR charger. An XLR is a connector. Used on many electrical devices and also many different types of lead and lithium chargers of many different voltages.

And when you say CELLS are you talking about a battery in series or as a single cell or cells in parallel? If you mean in the chair and built up into a battery pack or "battery" then it all depends. Yes you can ONLY if you use a BMS and only if the chargers algo is suitable.

[7Gluk]

One more question
For li-ion (were lead) battery, do these remote settings need to be changed or is it not critical?

[Burgerman]

You COULD tweak them to better reflect lifepo4 but since the algo for the guage is expecting lead with peukert and voltage recovery over time it still wont read correctly. So not much point.

Just stop driving when the lowest cell drops below 2.9V. But for 90% of the day the voltage will change more due to temperature than it does due to state of charge so a meter is useless.

[terry2]

I don't know if it's any good.
But the GT Eight 8S is on sale for $50 on the singapore site.

[Burgerman]

That should tell you all you need to know.

[steves1977uk]

Let's see if Terry cogs on why we avoid the GT Series. The price is the clue!

Steve

[terry2]

Let's see if Terry cogs on why we avoid the GT Series. The price is the clue!

Steve

Never mind the price of that...

https://www.ebay.co.uk/itm/revolectrix- ... fresh=true

That will go for silly money....£300?

[Burgerman]

Well the parallel charge board is around 50 alone.

[Burgerman]

Well the parallel charge board is around 50 alone.

[terry2]

I got a PL8 coming by friday...with my new power supply...I'M BACK

[daunjan]

Hey Terry how you score the pl8 thought they were still on backorder?

[terry2]

Hey Terry how you score the pl8 thought they were still on backorder?

I posted the ebay link above...cost me 2 kidneys

[terry2]

Does anyone know what PL8 V2 balance cable plug is?

What I am trying to do is buy a converter from the PL8 to this https://www.isdt.co/bg-8s.html?lang=en
which I THINK is a XH 2.54 plug.

I can't solder any more and the guy who normally helps me is not very well.
Thanks

[steves1977uk]

The PL8 balance connector is the JST-PA series, 2mm pitch I think. This was posted a while back on here somewhere.

Steve

[terry2]

The PL8 balance connector is the JST-PA series, 2mm pitch I think. This was posted a while back on here somewhere.

Steve

Well done Steve

Off to find a converter...

[steves1977uk]

Here Terry... http://www.jst-mfg.com/product/detail_e.php?series=189 Seems my memory was correct.

Steve

[terry2]

Here Terry... http://www.jst-mfg.com/product/detail_e.php?series=189 Seems my memory was correct.

Steve

I will try to find some one to make me a lead up.

All I want it for is to check the cells on a very long run.

[shirley_hkg]

You don't need another JST on chair side.

Need only one to feed PL8, and you have it already.

[ex-Gooserider]

JST-PA series connectors are small, fiddly and generally a pain to build (JST-PH is worse...) The pins are / should be crimped, not soldered....

Because they use small wires (AWG-24 is their max size IIRC) they tend to be on the delicate side, and they really aren't designed for a lot of mating cycles. Their primary intended use is for connecting things inside electronics boxes as part of assembly on a more or less long term basis....

IMHO it is NOT the best choice of connector for use on the PL-8, I would consider it to be one of the relatively few weak points in the charger.

Obviously you need one to get out of the PL-8 to something more robust, but I would suggest NOT using them anywhere else. I think the best approach for the chair end is to use the 'DB-x" connectors that combine the balance and power pins into a single unit - I believe they are described earlier in this thread...

ex-Gooserider

[daunjan]

Hey Terry,

Glad you got one, just got a msg back from Singahobby they have a new CELLPRO DUAL PWRLAB 8x2. Thought I'd post up here. Not keen on a dual pl8

The price is S$360.00.
http://www.singahobby.com/

Not sure on shipping haven't followed up on email.

[Burgerman]

You dont want that.

[daunjan]

Thoughts be more complicated to use as double the charger double the power supplies, double amperage wattage etc..

What you think?

[Burgerman]

Bad idea for a number of reasons. One of which is that you will be using the standard charge profiles. And not the modified ones we have for the PL8. And so you will see a bunch of errors at various times. And if one side dies you have a big heavy charger that only half works. And that they use common ground so you cannot charge say 10 or 16S. And a bunch of other stuff.