Ping battery with 9 FET 72V Lyen controller

[davy1010]

I've been riding my ebike for a while now, I have a Ping 48V 15AH battery and a Ampedbikes kit (9C direct drive kit).

I'm loving my bike but the acceleration is kinda slow. I noticed on my watt meter the Ampedbikes controller allmost never pulls more then 15 amps.

To get better acceleration, I'm thinking of buying a 9 FET 72V Lyen controller and program it around 20-25 amps. Is this going to give a noticable effect?

On the Ping battery website I found this info of my battery:
Rated Discharging Amperage: 15 Amps
Max Continuous Discharging Amperage: 30 Amps
Maximum Discharging Current: 60 Amps
Discharging Cut-off Protection: 40-50 Amps

30 amps max contiuous discharge tells me my PING battery is 2C (15 AH). So 20-25 amps should be no problem. Or am I seeing this wrong? What does "Rated Discharging Amperage: 15 Amps" mean?

Do you guys believe this will kill my battery in a matter of weeks? I know it will affect battery life in the long run but that's no problem I'm not planning to ride my bike for 3 years on the ping battery.

2nd thing on my mind is the 9C direct drive motor. I've always thought these electric motors are really though and can handle much more but to be sure I'll ask it anyway: Can it handle it?

Anybody have any experience with a PING battery at 20 and higher amps?

 

[dumbass]

Sorry to bust your bubble but your Ping pack is a 1C. But that is not to say it can't pull your desired 20 to 25a. But it will shorten it's life cycles. The rated discharge is just that "the rated discharge". But many suppliers add a higher max continous discharge because they actually can do it but as I said I think it will effect your life cycles.

Bob

 

[Icewrench]

9c`s can take around 2000 watts and keep going.
A bit of solder on the shunt in your controller will give some more amps.

 

[gensem]

Ping cells ll die faster if you go over 2c... before that the life is pretty good.
I use a ping myself at 2c and being happy with it.

 

[neptronix]

That 2C rate is basically what the battery can handle for an extended amount of time without dying.
For all purposes, a ping battery will give it's best performance, and give it's rated cycle life at the rated discharge ( 1C ) or below.

Now, shunt modding your controller won't give you a higher top speed, it will just increase the limit of amps. So, acceleration and hill climbing will improve, but your amp usage at top speed will be the same.

In reality, your ampedbikes controller is well suited for your battery with a max output of 22 amps. A shunt mod to get it up to 25 amps would be easy to do, and not too hard on the battery since you would be within the limit of the battery's output.

If you do this, make sure the controller is well ventilated after; it will produce more heat as a result.

 

[wesnewell]

I shunt modded my 48V 30A controller to about 42A and it works fine on a 48V 500W Golden motor and improved power, but not speed. Just recently I changed the controller to a cheap $31 40A 72V controller and it screams at 96V.

 

[dogman dan]

First off, pings V2 batteries have 2c cells. V1 batteries had 1c cells. But the advice to run then at an average rate of 1 c remains, just like your lipo will last longer if you run your 20c cells at 10c.

So I call a 30 amp controller the max you should run on a 15 ah ping, myself. No harm in pulling 30 amps some, the battery is rated for it. But the way motors and controllers work, 95% of the time you will pull half that.

A bigger controller in amps will make the bike climb better, and accelerate faster. It will give you a fairly small increase in top speed. But you will not draw more amps once at speed. If the laws of physics say 27 mph takes 600 watts, it takes 600 watts. Amps will only increase when you go uphill, or into wind, when the laws of physics say 27 mph takes 1500 watts.

Back to battery lifespan, try to recharge before you get to the point of the bms cutting off, 80% dod results in better balancing on recharge, and longer lifespans.

If you get that 72v controller, make sure you have lyens modify it for 48v if it needs it. Or just get a 30 amp controller from Grin cyclery.

 

[davy1010]

That 2C rate is basically what the battery can handle for an extended amount of time without dying.
For all purposes, a ping battery will give it's best performance, and give it's rated cycle life at the rated discharge ( 1C ) or below.

Now, shunt modding your controller won't give you a higher top speed, it will just increase the limit of amps. So, acceleration and hill climbing will improve, but your amp usage at top speed will be the same.

In reality, your ampedbikes controller is well suited for your battery with a max output of 22 amps. A shunt mod to get it up to 25 amps would be easy to do, and not too hard on the battery since you would be within the limit of the battery's output.

If you do this, make sure the controller is well ventilated after; it will produce more heat as a result.

Thx a lot for this tip, I did not know about this mod. Cheap and easy solutoin . I will start with a little solder and will take it from there.

 

[dbaker]

I shunt modded my 48V 30A controller to about 42A and it works fine on a 48V 500W Golden motor and improved power, but not speed. Just recently I changed the controller to a cheap $31 40A 72V controller and it screams at 96V.

What was your source for the $31 controller?

 

[wesnewell]

I shunt modded my 48V 30A controller to about 42A and it works fine on a 48V 500W Golden motor and improved power, but not speed. Just recently I changed the controller to a cheap $31 40A 72V controller and it screams at 96V.

What was your source for the $31 controller?

My mistake. It was $37.62 shipped.
http://www.dhgate.com/72v-1500w-brushless-speed-controller-for/p-ff808081283845f5012848d41bf455fb.html
And how it works.
http://endless-sphere.com/forums/viewtopic.php?f=2&t=29469

 

[dbaker]

Nice find

 

[dogman dan]

No kidding. likely to have a 60v or so lvc, so it must run at 72v. No good for the 48v ping, but a great controller I bet, for an efficeincy minded commuter, or an emergency spare controller to use till you send $$ to Lyens.