PINNED - Lithium battery conversion/info

[Burgerman]

They have it after the holiday season! And everything stops.

[Burgerman]

This will amuse Expresso.

Coil of wire (normally used for balance wires)
1 magnet from eBay.
And power supply set to 2V and 10A max (draws about 9).

This is how your motor works!

www.wheelchairdriver.com/gopro/magnetic.mp4

[Burgerman]

Aluminium tube, magnet...

www.wheelchairdriver.com/gopro/magnet2.mp4

[steves1977uk]

Always enjoy watching your videos BM It's like electronics porn

Steve

[expresso]

They have it after the holiday season! And everything stops.

i might as well wait till well after i think - it happened to me already - taking too long to get it shipped - holiday etc , -

maybe Feb. is good to make a order - i am just itching - dont need it in a rush anyway -

Oil filter - reminds me when i used to change them LONG time ago -

i like your desk area - nice and roomy - i need a house just for this stuff alone -

[Burgerman]

Oil filter is for my van. And a very expensive gallon of Mobil 1 full synthetic 0w-40 SAE oil. Stupid price but I used to build race engines and break them. Its the best there is. Absolute total overkill for a van! Any old 5w-20 recommended. Thats rubbish! I couyld explain why but you wouldn't want to hear it.

https://mobiloil.com/en/motor-oils/mobil-1

For that vehicle the one you want is the 0w-40 one. http://www.mobil1.co.uk/synthetic-engin ... 0w-40.aspx

[expresso]

yes i remember Mobile 1 - when it came out - it was about 5 dollars a quart i think here - i used it on all my cars - after i break them in first with the stock oil - short period - then switch it out for Mobile 1 -

when i had my engine redone it had 98,000 miles on it and was still clean inside - i would say it was the Mobile 1 - must have helped keep it clean - less wear -

after all the work - it was a different car to drive did a number on my kidneys from the high lift cam dual lobe - oversized Valves - aluminum heads - it was great to drive that thing after - all well - i just got my Rims delivered -

for my rear wheels - stock rims - for the Black tube tires sitting here -


http://www.ebay.com/itm/291223842982?_t ... EBIDX%3AIT i ended up getting the same stock tires i have but in black with tubes - cross my fingers when all done - the front casters are mounted and i love them so far how they look -

PSI i have to figure out whats best once on the chair and using it - i have it at 25PSI for now - the rears i am not sure what i will put to start off -

[rustyjames]

I use Mobile 1 synthetic in my VW Eurovan; just bought a gallon jug and it was only $24.00. It actually one of the cheapest synthetic oils sold over here.

Correction, it was 5 quarts https://www.walmart.com/ip/Mobil-1-0W-4 ... ./23636902

[Burgerman]

You know why its currently cheap (here) though don't you?

Its in the process of being "replaced" by a newer version (that's exactly the same probably) with a different marketing name. Its being offered cheap all over at the moment, even eBay. But don't let that worry you. Its as good as it gets.

Also the van manufacturer recommends a thinner one. 5w-20 or 30 now. Not because that's better for your engine. But because it saves a few pennies at the fuel station. And the manufacturer gets taxed on the average mpg of their entire sales.

[Gnomatic]

They have it after the holiday season! And everything stops.

Does EV Assemble usually have post holiday sales on cells etc? If so I'll wait on ordering my cells. I don't need my pack till April.

[expresso]

i never seen them on Sale - maybe shoot them an email or call to find out - they may give a bit of discount on shipping maybe if purchasing alot

i know it happened to me during this time of year last year - first it was there shipping company there having issues - then the holidays came around and had to wait -

End of Jan. should be good - holidays should be over for them by Feb.

too bad the headway dealer here in the states charge too much for them - maybe 5 dollars more each cell plus nothing is free - no extra buss connectors or orange blocks etc, nothing -

even with the shipping from china its much cheaper than here - its too bad - would have been easier to get them from here - but overall if all goes well from EV - its not bad - i say give it a month to be on the safe side - maybe sooner

[Burgerman]

You 'mericans... EV is a company. They sell at the best price they can to maximise profit given the competition, world market etc. They dont do 'sales' or special offers, or deals because they are already doing them.

The market value of lithium per Ah changes like the other markets, oil, gold, testicles, wine, etc.

[expresso]

Connectors -

between the XT90 - EC5 - SB50 -

What amps - etc, can each one of those connectors handle ? i know BM knows all of this -

i am thinking of the ADD ON i want to make and leave connected all the time - MAYBE - i decided if i did it - i would disconnect to charge the ADD ON alone and then the chair alone - then reconnect -

i dont want to disconnect the SB50 each time on the chair end to do this - its very hard to disconnect and reconnect - on top of doing it daily - i wont be able to do - so have to have one of my girls all the time - and i am sure sooner or later - sometime can go wrong -

so my idea was to leave it connected on the chair end - and make the cable in two parts -

since the XT90 Connector is much easier to disconnect etc, - i was thinking of using the XT90 on the ADD ON - short cable - then another longer cable from the XT90 to the Chair SB50 end - if i have to charge - i can easily disconect the XT90 with out having to even bend down - would be much easier for me also - and anyone else who needs to do it for me -

i can make the XT90 with 10 AWG cable - the chair end is made already with 10AWG cable and does have the XT90 on the battery end also - SB50 on the outside chair end -

What kind of Amps etc, would this cable actually see when in use ? XT 90 10 AWG should be fine ?

or the EC5 ? would that be any better or about the same etc, - i have XT90 connectors now - would have to buy EC5 and never soldered those - so if XT90 is more than good enough - would use them -

best easiest way i think is this way to keep an ADD ON connected all the time - and just charge each on its own -

what do you think BM ? you know those connectors best i believe -

[Gnomatic]

You 'mericans...

All in the game, yo.

[flagman1776]

Expresso,
Can you anchor one side of the SB50 for better force in removal? Like BurgerMan did on his chair! The holes through the housng are for small mounting bolts. There's also a low force version of the SB50. I wish I'd bought it... they are just smaller bumps in the contacts, in the same housing.

The '50' in SB50 refers to AMPS rating. Can't help on the others.

[Burgerman]

No it refers to the fact that its hot plugable at up to 50A x number of times. Actual Amp capability far higher. 120A.
Thats what I would use. The others are designed for hobby use to be as light as possible. To pass lots of amps for flight.

https://www.google.co.uk/url?sa=t&rct=j ... tw&cad=rja

[expresso]

Expresso,
Can you anchor one side of the SB50 for better force in removal? Like BurgerMan did on his chair! The holes through the housng are for small mounting bolts. There's also a low force version of the SB50. I wish I'd bought it... they are just smaller bumps in the contacts, in the same housing.

The '50' in SB50 refers to AMPS rating. Can't help on the others.

i heard of those low force models here - but i never seen any for sale - not sure if thats good either - i rather it be a safe good connection - - the connector is ok wrapped around and wont really move much if held while being pulled apart

but its very hard to pull apart also - if someone had to do that each day on and off - on and off - its hard and rather not keep doing that

[expresso]

No it refers to the fact that its hot plugable at up to 50A x number of times. Actual Amp capability far higher. 120A.
Thats what I would use. The others are designed for hobby use to be as light as possible. To pass lots of amps for flight.

https://www.google.co.uk/url?sa=t&rct=j ... tw&cad=rja

i actually have the cable for the ADD ON on my chair now - one end is the XT90 and other end to the chair outside is SB50 - reason for doing the XT 90 is the size - small compact - and easy to fit in there - easy to remove also -

thats rated to about 90A - they say - could be more for short bursts - its all done with 10AWG -


i guess it cant be any worse than it is now if used the XT 90 for the ADD ON also on the battery end ? or if i can find a low force SB50 model - maybe i can try that on the ADD ON battery side since thats the one i will be removing each time i charge -

if anyone can find a link to the SB50 low force - would be great -

Happy Thanksgiving everyone

[Scollard]

Oil filter is for my van. And a very expensive gallon of Mobil 1 full synthetic 0w-40 SAE oil. Stupid price but I used to build race engines and break them. Its the best there is. Absolute total overkill for a van! Any old 5w-20 recommended. Thats rubbish! I couyld explain why but you wouldn't want to hear it.

https://mobiloil.com/en/motor-oils/mobil-1

For that vehicle the one you want is the 0w-40 one. http://www.mobil1.co.uk/synthetic-engin ... 0w-40.aspx

Mobil 1 0W40 is what is recommended for my Porsche and Mercedes but it is not The Best. AMSOIL is the best, but almost double the price of Mobil 1. The people at my Porsche shop have rebuilt so many engines that they have their own empirical evidence that the wear and tear on an AMSOIL run engine is less than a Mobil 1 engine. That being said I run Mobil 1 as my Porsche holds about 12 litres of oil due to its dry sump.

[Burgerman]

I think both are good. Amsoil is unknown here. But I doubt its actually better. Once you get to this level, there's very little gains to be had. You are at the limit of technology. Its all swings and roundabouts.

[expresso]

http://www.manzanitamicro.com/products? ... 9&vmcchk=1

i though they were selling just the box - with no Cells inside at first -

i just realized - its complete - still expensive - nice box though -

[shirley_hkg]

This thick argarlyc plate is heavy .

My 45Ah pack with 1.5 mm SS box now weights 40 lbs.

Out of my expectation, it's heavy and high CG on the backrest .

[expresso]

sounds heavy - what does the 45ah weight on its own - with out the case ?

have you considered just drop it in a plastic container ? and sit that in a Backback - like a messanger bag - thats my idea to keep it hanging on the rear - but i also do use two bungee cords also

[shirley_hkg]

What's the biggest charging current of PL8 , with 12V input ?

[expresso]

What's the biggest charging current of PL8 , with 12V input ?

i think from what a few others say it can be used to charge to about 20A to 25A charging -

i just got a 12V PSU 900 Watts - waiting on the PL 8 etc, - once i get it - i will try it on my chair with the Lead and ADD ON - i usually charge at 25A - with the 24V charger

i will see it works the same way with the 12V PSU - another week i should have everything and will let you know what it does -

[shirley_hkg]

OK.

[Burgerman]

60A max input.
12V = 720 WATTS

60A max input.
14.4V FROM A CAR = 864 WATTS.

90% efficient.

So you get 648 or 778 watts max output.

So 3.25 x 8 = 26.0V And 648 div by 26.0 = 24.92A charge at 12v supply.

Or 29.92A charging from a typical 14.4v running car.

[shirley_hkg]

I want to avoid the recent scenario of another member that the charging and supply voltages are too close .

18V seems an advisable choice , itsn't it ?

[Burgerman]

That seldom happens. I usually use anything that's a volt or two above, or below without trouble. In fact its hard to make it actually give an error unless battery is high resistance or cables long. It happens because the volts rise as soon as it applies a current. And then it has to swap from boost to buck. While its doing that the volts fall again so its wrong again... With lithium its unlikely you could get that error to happen anyway. Once you are aware of it, all you need do is drive 100 meters, or wait a few mins, and it will charge anyway.

[shirley_hkg]

You mean it only happens at START .