GoldenMotor.com Forum

General Category => General Discussions => Topic started by: MrWillyChai on June 17, 2012, 11:30:38 PM

Title: Is this battery safe for the Pro 901?
Post by: MrWillyChai on June 17, 2012, 11:30:38 PM

Hi, just wondering if a 52V 11.5Ah triangle A123 Pack (16S 30A) is safe to use on the Pro 901 kit. Thanks.

The battery information: http://www.emissions-free.com/catalog/i29.html (http://www.emissions-free.com/catalog/i29.html)

Title: Re: Is this battery safe for the Pro 901?
Post by: Bikemad on June 18, 2012, 02:10:02 AM

Hi and(https://i.imgur.com/evDSMvT.png)to the forum Willy.

That battery should be fine for use with the Pro 901 kit as it would be less than 60V fully charged.

Alan
 

Title: Re: Is this battery safe for the Pro 901?
Post by: MrWillyChai on June 18, 2012, 03:18:11 AM

Quote from: Bikemad on June 18, 2012, 02:10:02 AM

Hi and(https://i.imgur.com/evDSMvT.png)to the forum Willy.

That battery should be fine for use with the Pro 901 kit as it would be less than 60V fully charged.

Alan
 

Thanks Bikemad! Just one more question.

My expectations of the bike I'm building is:
Range: 25km
Speed: 45km/h cruising with the above range
No Pedaling

Bike will be made using:
Pro 901 kit
Bike: Trek 820 26"
Battery: 52V 11.5Ah triangle A123 Pack (16S 30A)

Do you think it will meet my requirements? If not, what do you recommend I change?

Title: Re: Is this battery safe for the Pro 901?
Post by: Bikemad on June 18, 2012, 02:16:03 PM

I don't think you're going to be able to achieve your expectations with that battery pack and motor combination.  :(

According to the Dynomometer results, the HSB 48V 1000W motor would be drawing around 25 Amps at 45 km/h (363 rpm on a 26 x 2.00" tyre).

That 11.5Ah pack would only be able to supply 25 Amps continually for approximately 0.44hr before it was fully exhausted, which would give a range of less than 20km on a level route.

I estimate that you would need at least 14.5Ah capacity to complete a 25km trip at 45km/h without pedalling on a perfectly flat route without any stopping/starting and no headwinds.

Riding at full throttle without pedalling will reduce the range considerably, so you would need to restrict your maximum current and/or ride at a slower more efficient speed in order to obtain a longer range with that particular battery pack. ;)

Alan
 

Title: Re: Is this battery safe for the Pro 901?
Post by: MrWillyChai on June 19, 2012, 02:58:36 AM

Quote from: Bikemad on June 18, 2012, 02:16:03 PM

According to the Dynomometer results, the HSB 48V 1000W motor would be drawing around 25 Amps at 45 km/h (363 rpm on a 26 x 2.00" tyre).

Alan

Hey where can I see the Dynomometer results so that I don't have to keep bothering you for statistics?

Wilson

Title: Re: Is this battery safe for the Pro 901?
Post by: Kirk on June 19, 2012, 02:04:48 PM

http://ebike.ca has a good online Simulator. For the GM motor pick the 1606 hub motor from the list, then just fool around with the different settings till you find the solution you need.

Have fun
   Kirk

Title: Re: Is this battery safe for the Pro 901?
Post by: Bikemad on June 20, 2012, 12:13:02 PM

Quote from: MrWillyChai on June 19, 2012, 02:58:36 AM

Hey where can I see the Dynomometer results so that I don't have to keep bothering you for statistics?

Here's a link to the Dyno results I found on the GM website:

HBS-48V1000W Performance Curve.pdf (http://www.goldenmotor.com/e-Bike-DIY/HBS-48V1000W%20Performance%20Curve.pdf)

And I have attached the data sheet below.

Alan