Faster Charging?

Mtnm

Active Member
Has anyone found a way to charge the batteries faster?
I'd like to do some car camp trips and bike riding.
Currently it takes around 5-6 hours to charge my 12 Ah battery.
In theory it seems like an inverter generator able to run at 1800 watts (like a Honda 2000) should be able to charge the battery in under 1 hour, if this doesn't produce an overheating situation.

For other reasons I did add a 400 watt inverter to my truck, so in theory I could charge the battery in 3.5 hours, still better than the 6 hours I need to allow for now.

Mike
Colorado, USA
NeoJumper 26"
 

Sina

Member
Safest bet is probably to buy an extra battery and not risk any explosions. But I have to say my neo batteries all seemed to charge within 2-4 hours, both 9's and 12's
 

Mtnm

Active Member
Safest bet is probably to buy an extra battery and not risk any explosions. But I have to say my neo batteries all seemed to charge within 2-4 hours, both 9's and 12's
Sina,
Thank you for the suggestion. I do have two batteries (9Ah and 12Ah).
Are you getting 2-4 hours of recharge time from batteries discharged so only 1 bar shows?

Mike
 

Ann M.

Well-Known Member
The whole idea of a BMS (battery management system) like what's in your Neo Jumper battery packs is to prevent over amping of those cells inside It's just too easy to overheat and have a spectacular thermal event if you charge too fast, which I don't think is your goal Mtnm! :)
 

Mtnm

Active Member
What type of charging times are others on the forum getting?
As Ann points out I don't want a class D fire event, but I also would like less than 6 hours to charge a 12 Ah battery.
 

Ann M.

Well-Known Member
What's the amp hours of your current charger? If its a 3 amp charger, 4 amp would be safe on the larger 12amp battery and shave some time off. Also, have you checked the voltage output of the charger to see if its doing what the label sez it ought to be--occasionally, that is an issue.
 

PowerMe

Well-Known Member
I have the same 2A charger that comes with 11.6ah battery. It's slow. Takes about 1 hour per bar to recharge, up to 5 hours.
 

Mtnm

Active Member
Ann,
It is rated as a 2 amp charger. The labeled voltage is 36 volts, but the measured voltage is around 42 volts.
 

Ravi Kempaiah

Well-Known Member
I have sold my Neo Jumper (with a little heartache) and I did face similar charging times.
The BMS should accept 4A charging but EM refuses to support that method as it may shorten the lifespan.

< smirk> Stromer ST2 charges at 4.5A (for a 48V system) and Spitzing charges at 5A (for a 880Whr capacity battery).
 

Mtnm

Active Member
I have sold my Neo Jumper (with a little heartache) and I did face similar charging times.
The BMS should accept 4A charging but EM refuses to support that method as it may shorten the lifespan.

< smirk> Stromer ST2 charges at 4.5A (for a 48V system) and Spitzing charges at 5A (for a 880Whr capacity battery).
Thanks, good info.
If EasyMotion has decided they will not support a higher than 2 amp charger I'll just have to accept that and move on.
The NeoJumper is a great fit for the type of riding I end up doing so I'll likely be keeping it for several years.

I've given thought to how to run a charger for 6 hours when camping. One way is to simply keep my truck idling for 6 hours and use the inverter; surprising how little fuel an idling truck consumes. The other option is using an inverter running and chained for the equal length of time.
Anyone have other options I'm missing?

Mike
 

eDean

Active Member
One option is to have two batteries and two chargers. This can give you an effective charge rate of 4 amps. I have a second battery now it really unlocks a lot of potential. Excellent gift for the eBike person in your life including yourself.
 

PowerMe

Well-Known Member
2 batteries is what I'm leaning towards as well. I'm waiting to see if I can hold out for the (rumored) higher ah capacity 36 volt battery allegedly to be released for 2016. I heard there might be a 14ah battery and I'm crossing my fingers and toes it's at least that much and that it will be backwards compatible to the 2015 EVO bikes.
 

Ravi Kempaiah

Well-Known Member
Thanks, good info.
If EasyMotion has decided they will not support a higher than 2 amp charger I'll just have to accept that and move on.
The NeoJumper is a great fit for the type of riding I end up doing so I'll likely be keeping it for several years.

I've given thought to how to run a charger for 6 hours when camping. One way is to simply keep my truck idling for 6 hours and use the inverter; surprising how little fuel an idling truck consumes. The other option is using an inverter running and chained for the equal length of time.
Anyone have other options I'm missing?

Mike

There are people who charge their bikes at 21A (2 or 4 or 5 is nothing)
But you really have to know the ins-outs of your controller and set up the charging device.

Take a look. This guys charges at 21A and he completes charging his 1.5Kwhr battery in less than an hour.

 

PowerMe

Well-Known Member
What do you recommend, @Ravi Kempaiah to charge the battery at, say, a 4a rate on the Easy Motion batteries? I know in theory it can be done, but what have people been able to successfully use on these specific batteries?
 

Ravi Kempaiah

Well-Known Member
What do you recommend, @Ravi Kempaiah to charge the battery at, say, a 4a rate on the Easy Motion batteries? I know in theory it can be done, but what have people been able to successfully use on these specific batteries?
I had a Neo Volt before and I have used 4A charger and it works (I did it only 3 times). I was able to charge 9Ah battery from 10% to 90% in ~ 2 hours and the battery gets slightly warmer.
I don't know the limiting amperage for BMS used in EM bikes but if you have a battery that is out of warranty, it's worth trying and 4A shouldn't lead to any catastrophic damage.
I can say that with certain confidence because both Stromer and Easy Motion batteries are manufactured by the same company in Taiwan (TD HiTech) and Stromer ST1 uses 3 or 4A charger and it works fine.
 

PowerMe

Well-Known Member
My battery is only 4 months old so not out of warranty. The connector is unique to Easy Motion. I wouldn't know where to obtain a compatible 4a charger that would even work with this battery and its connectors, were I inclined to try it.
 
I can say that with certain confidence because both Stromer and Easy Motion batteries are manufactured by the same company in Taiwan (TD HiTech) and Stromer ST1 uses 3 or 4A charger and it works fine.
According to Court's reviews, Easy Motion batteries for the 2015 EVO line are made by Samsung.
 

Ravi Kempaiah

Well-Known Member
My battery is only 4 months old so not out of warranty. The connector is unique to Easy Motion. I wouldn't know where to obtain a compatible 4a charger that would even work with this battery and its connectors, were I inclined to try it.
There are tons of chargers on Em3ev and Aliexpress.

Once your battery goes out of warranty, you can tinker with it :)