E-max 110s lifepo4 upgrade

General Discussion about large electric scooters and motorcycles and other things with no pedals.
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flexy   100 W

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Re: E-max 110s lifepo4 upgrade

Post by flexy » Dec 15 2014 5:20am

Mine's through Rampdale, around £120.
72V Crooza scooter, converted to lifepo4 24AH 24S2P Headway, Lyen 18FET controller, 47mph
72V E-max 110S converted to lifepo4 A123 100AH 24S5P, Sabvoton 72150 controller, 49mph

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flexy   100 W

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Re: E-max 110s lifepo4 upgrade

Post by flexy » Dec 21 2014 9:53am

Can anyone tell me how the headlight system is powered on the e-max?

I wanted to try some LED H3 bulbs for the headlights but they seem to operate on some sort of AC , my meter only reads 2.7V across the main bulb in both AC and DC modes, there is also a buzzing sound when they are on.

The brake light is now permanently on, I can't figure out why, brake switches work fine..
72V Crooza scooter, converted to lifepo4 24AH 24S2P Headway, Lyen 18FET controller, 47mph
72V E-max 110S converted to lifepo4 A123 100AH 24S5P, Sabvoton 72150 controller, 49mph

whereswally606   100 kW

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Re: E-max 110s lifepo4 upgrade

Post by whereswally606 » Dec 24 2014 12:28pm

I'm no help on the lights flexy but I have news on my emax. So I managed to get out one of the four 12v 68ahr greensaver batteries. My volt meter only measures 3volts. I've tried to charge one on a tp1430c thunder power charger. But it thinks that because of the low voltage it sees the battery as a 6v but even if you try to charger on that voltage it gives up after a couple of mins at 13.8v at 0.2amps. A friend has recommended using a dump car charger first to get up to a reasonable voltage. Any ideas?
Distributing "Lebowski" FOC Controller PCB (Through hole) since 2016
Moped: Emax 110s 2009

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flexy   100 W

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Re: E-max 110s lifepo4 upgrade

Post by flexy » Dec 26 2014 11:53pm

If an SLA has dropped to 3V I doubt you'll revive it I'd start building a lithium pack :P
72V Crooza scooter, converted to lifepo4 24AH 24S2P Headway, Lyen 18FET controller, 47mph
72V E-max 110S converted to lifepo4 A123 100AH 24S5P, Sabvoton 72150 controller, 49mph

whereswally606   100 kW

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Re: E-max 110s lifepo4 upgrade

Post by whereswally606 » Dec 27 2014 5:18pm

I'm sure you are right flexy but I'm gonna give it ago anyway just cause I have a dcdc that I can tune down to .2amps and I'll run it detached from a big car sla with some solar trickle cells at the end of my garden. Will be an interesting experiment. Do you have the details of where you got your a123s?
Distributing "Lebowski" FOC Controller PCB (Through hole) since 2016
Moped: Emax 110s 2009

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flexy   100 W

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Re: E-max 110s lifepo4 upgrade

Post by flexy » Dec 28 2014 2:58pm

Mine were from the dodgy Victpower. There are other sources now but probably more expensive, you might also want to look at Nissan leaf cells.
72V Crooza scooter, converted to lifepo4 24AH 24S2P Headway, Lyen 18FET controller, 47mph
72V E-max 110S converted to lifepo4 A123 100AH 24S5P, Sabvoton 72150 controller, 49mph

whereswally606   100 kW

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Re: E-max 110s lifepo4 upgrade

Post by whereswally606 » Dec 29 2014 4:59pm

I was thinking of going for a Prius nimh pack maybe. Or Honda hybrid cells. Where can you buy leaf cells?
Distributing "Lebowski" FOC Controller PCB (Through hole) since 2016
Moped: Emax 110s 2009

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louis raaijmakers   100 W

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Re: E-max 110s lifepo4 upgrade

Post by louis raaijmakers » Dec 30 2014 11:51am

aah nice project.
and nice to see more people in holland are going in to e-scooters and e-bike's

gr louis

jumpjack   100 W

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Re: E-max 110s lifepo4 upgrade

Post by jumpjack » Apr 13 2015 5:04am

My original battery on emax 120L is failing, now allowing only 20 km range although it has 52 ah.
I made just 15000 km, in 25 km "chunks", so probably I have just one cell dead.
Is there any tech doc available about original 50 Ah battery? Number and type of cells used, wiring,...?
I've been asked 5000$ by vendor for full battery replacement, which is just insane...

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flexy   100 W

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Re: E-max 110s lifepo4 upgrade

Post by flexy » Apr 13 2015 5:38am

That is expensive, you could build or buy one for much less, is yours 60V lithium?
72V Crooza scooter, converted to lifepo4 24AH 24S2P Headway, Lyen 18FET controller, 47mph
72V E-max 110S converted to lifepo4 A123 100AH 24S5P, Sabvoton 72150 controller, 49mph

jumpjack   100 W

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Re: E-max 110s lifepo4 upgrade

Post by jumpjack » Apr 13 2015 7:03am

It's 48V/52Ah

whereswally606   100 kW

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Re: E-max 110s lifepo4 upgrade

Post by whereswally606 » Apr 22 2015 7:25am

managed to fix my charger for the emax, the green on led had become detached, so was a 5pence fix. anyway another thing I noticed was the brake light is always on, is this normal, has anyone got a picture or diagram of the msu and its wires connected. I have a few wires on mine missing so this could be the cause.

thanks chaps
Distributing "Lebowski" FOC Controller PCB (Through hole) since 2016
Moped: Emax 110s 2009

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flexy   100 W

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Re: E-max 110s lifepo4 upgrade

Post by flexy » Apr 25 2015 5:30am

I had the same problem with mine. It seems the MSU has switched it on permanently. There could be a relay in there that's seized but I think they might be mosfet controlled, my MSU is potted in epoxy so no way of fixing it . I ended up rewiring the brake light so the always on brake powered the rear light and the brake light was turned on by a separate relay from the brake switches.
72V Crooza scooter, converted to lifepo4 24AH 24S2P Headway, Lyen 18FET controller, 47mph
72V E-max 110S converted to lifepo4 A123 100AH 24S5P, Sabvoton 72150 controller, 49mph

whereswally606   100 kW

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Re: E-max 110s lifepo4 upgrade

Post by whereswally606 » May 05 2015 5:35pm

flexy wrote:Mine has the black epoxy so I can't do those modifications you show.
Hey flexy/yokean I mended my black epoxied Msu board and although you can't really get to the top side I think yokean's mods are all the the underneath which I've learnt from taking mine apart are not covered in black potting. So looks like upgrade to more volts and a drop down 12v converter is possible too. :)
Distributing "Lebowski" FOC Controller PCB (Through hole) since 2016
Moped: Emax 110s 2009

costicuta2000   1 mW

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Re: E-max 110s lifepo4 upgrade

Post by costicuta2000 » Jun 12 2015 12:23pm

jumpjack wrote:It's 48V/52Ah
Hello, I have the same problem on my 120L. At 17000 km I had 10 cells dead. In fact all the pack has 18650 cells (14S and 26 paralel). I can't find the brand. I repared the pack with 26 sony cells and since then I made almoust 3000 km with no problem. Now my 120L is on 15S (55,5V nominal and 62V full charge). I have better acceleration, I can realy feel the 80Km/ limit. I think I'll change the whole pack this winter. 55,5V 130Ah. I need 150 km range (the beach is at 70Km and there is no charge station in my way).
I'll keep you informed
E-max 120L sevcon 15s li-mn. 80 km speed
Emax 90S modified to 72V 4,5kw kelly. Speed 73km/h 24S Lifepo4 pack
E-bike Bh Nitro stock configuration 45km/h
http://www.elvelor.fr

whereswally606   100 kW

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Re: E-max 110s lifepo4 upgrade

Post by whereswally606 » Jul 01 2015 7:37am

hey flexy, completed the London Brighton bike ride with my missus. should have tried to meet up to talk Emaxes. to be honest was a bit tired and due to the traffic on the m25 after didn't get home till the early hours next day (Manchester). anyway some money raised for hearts and such. hopefully next time I'm due to be in Brighton ill remember to PM you in advance.
Distributing "Lebowski" FOC Controller PCB (Through hole) since 2016
Moped: Emax 110s 2009

whereswally606   100 kW

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Re: E-max 110s lifepo4 upgrade

Post by whereswally606 » May 06 2016 5:30am

Flexy my E-max 110s is now on the road at 16s, did you get your E-max back on the road? If not are you using the Sabvoton. Think I will only go to 24s in total so would be exactly similar voltages to what you had. I am planning on building a lebowski controller but that will take me some time, in the meanwhile it might be good to have a known working 24s solution.
Distributing "Lebowski" FOC Controller PCB (Through hole) since 2016
Moped: Emax 110s 2009

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flexy   100 W

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Re: E-max 110s lifepo4 upgrade

Post by flexy » Jun 22 2018 9:38am

I'm now selling this bike without battery or speed controller,

https://www.ebay.co.uk/itm/Emax-110s-el ... 3024035372
72V Crooza scooter, converted to lifepo4 24AH 24S2P Headway, Lyen 18FET controller, 47mph
72V E-max 110S converted to lifepo4 A123 100AH 24S5P, Sabvoton 72150 controller, 49mph

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Re: E-max 110s lifepo4 upgrade

Post by offpist1 » Jul 06 2018 7:28am

whereswally606 wrote:
May 05 2015 5:35pm
flexy wrote:Mine has the black epoxy so I can't do those modifications you show.
Hey flexy/yokean I mended my black epoxied Msu board and although you can't really get to the top side I think yokean's mods are all the the underneath which I've learnt from taking mine apart are not covered in black potting. So looks like upgrade to more volts and a drop down 12v converter is possible too. :)
Edit, just want to confirm this works.
Under the prinntboard there is no black gue..
And i simplified it a bit. I did not remove Q3 and i did not remove the relay, still works great on 12V only.

The only question i have is, what pins are for the key? To turn the power on.

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