miro13car
100 kW
So I built my 36V A123 12S pack for my E+.
It weights 7.2kg and contain at least 2.5 more energy that 7- 8kg NMH hub battery,
And tested on my E+ and
it was fantastic ride.
The weather around 20C , wind around 15-20km/h.mostly flat.
From the test it was clear how factory NMH hub battery restrains and restrict motor from developing full potential.
NMH discharge curves are rather miserable comparing with A123 discharge graphs..
As it's known E+ uses the most sophisticated motor control scheme for its BLDC motor - vector controlled technique and deserve good battery. .
I rode 25.7km and used 8.26Ah.
I pedalled just for 5-8seconds on acceleration. BTW pedalling with standing up on pedalls was pretty scary with high centre of gravity - I cannot imagine riding ebike with 8kg of battery above rear wheel every day. AS you see my frame I will be mounting battery low between pedals. That why I choose Biria frame.
Used 325Wh of energy.
NMH hub battery is quite strong during first 1-3km and start to deteriorate quite fast.
So initially E+ can reach 45-47km/h but only during first kilometers of ride.
To start with A123 charges to 43V , E+ factory NMH charges to 41V.
Because of speeds I reached I rode on the streets only.
I was riding in level 8 only /out of 9 levels/
I reached and sustaned over 50km/h every time I had streach of road in front of me,
Incredibly E+ drew only 1200W during 52-53km/h sprints which testifies how efficient Eplus is.
I remember seeing 36A at over 50km/h couple of times.
All electric reading from CA, speed from CATEYE computer, E+ shows tipically 2km/h to much according to GPS on my Elpus.
Eplus on power up goes through initialization when disply/controller does handshake with other components of bike and if everthing OK connect NMH 36V to the motor. But you can disconnect power to the motor and connect your own 36V to that motor and initalization would not detect it. System doesn't care if it is its own 36V or ouside one.All the sytem cares about is if there is any 36V connectedto the motor.
PLEASE remember that all those speeds are achived with idle 10kg NMH weight in front wheel.
Next task for me is not easy one to get rid of front hub. I am sure it can be done.
BTW as from the gossips circulating around EMS does not sell ebikes anymore but Rick still provide tech support which was great in my case.
Thank you Rick.
What brought EMS down was foolish decision to choose LiPoiymer cells for their B battery which resulted in fire in one of bike shop which forced to issue recall of their Bbattery.
It weights 7.2kg and contain at least 2.5 more energy that 7- 8kg NMH hub battery,
And tested on my E+ and
it was fantastic ride.
The weather around 20C , wind around 15-20km/h.mostly flat.
From the test it was clear how factory NMH hub battery restrains and restrict motor from developing full potential.
NMH discharge curves are rather miserable comparing with A123 discharge graphs..
As it's known E+ uses the most sophisticated motor control scheme for its BLDC motor - vector controlled technique and deserve good battery. .
I rode 25.7km and used 8.26Ah.
I pedalled just for 5-8seconds on acceleration. BTW pedalling with standing up on pedalls was pretty scary with high centre of gravity - I cannot imagine riding ebike with 8kg of battery above rear wheel every day. AS you see my frame I will be mounting battery low between pedals. That why I choose Biria frame.
Used 325Wh of energy.
NMH hub battery is quite strong during first 1-3km and start to deteriorate quite fast.
So initially E+ can reach 45-47km/h but only during first kilometers of ride.
To start with A123 charges to 43V , E+ factory NMH charges to 41V.
Because of speeds I reached I rode on the streets only.
I was riding in level 8 only /out of 9 levels/
I reached and sustaned over 50km/h every time I had streach of road in front of me,
Incredibly E+ drew only 1200W during 52-53km/h sprints which testifies how efficient Eplus is.
I remember seeing 36A at over 50km/h couple of times.
All electric reading from CA, speed from CATEYE computer, E+ shows tipically 2km/h to much according to GPS on my Elpus.
Eplus on power up goes through initialization when disply/controller does handshake with other components of bike and if everthing OK connect NMH 36V to the motor. But you can disconnect power to the motor and connect your own 36V to that motor and initalization would not detect it. System doesn't care if it is its own 36V or ouside one.All the sytem cares about is if there is any 36V connectedto the motor.
PLEASE remember that all those speeds are achived with idle 10kg NMH weight in front wheel.
Next task for me is not easy one to get rid of front hub. I am sure it can be done.
BTW as from the gossips circulating around EMS does not sell ebikes anymore but Rick still provide tech support which was great in my case.
Thank you Rick.
What brought EMS down was foolish decision to choose LiPoiymer cells for their B battery which resulted in fire in one of bike shop which forced to issue recall of their Bbattery.