Raleigh Leeds - 26v Panasonic motor

[Jonah]

I have a 6 year old bike as per the title that is a great bike in many respects, smooth and comfortable but lacks the power to deal with hills around here. My question is, would I get more power if the battery was re-celled with higher discharge cells? And / or, the battery was increased to 30v for example?

 

[soundwave]

http://www.bga-reworking.co.uk/insat-li-nmc-ebike-battery-10ah-24v-36v-48v.html

 

[flecc]

Changing the battery cells won't give any more power since the unit's management controls that. Raising the supply voltage may not do anything either and if too great could cause damage.

It is possible to raise power within the unit by reducing the shunt resistance, and that's detailed within my Panasonic support website:

http://www.flecc.uk/p/panindex.html

Yours is the new type unit, but on that page go to Performance Enhancements at the foot, then the 26 volt new unit item.

The amount you reduce the shunt resistance determines how great the power gain, so it's trial and error. The problem is that stripping and rebuilding the unit between checks is extremely laborious.
.

 

[Deleted member 4366]

http://www.flecc.uk/p/panindex.html
The amount you reduce the shunt resistance determines how great the power gain, so it's trial and error. The problem is that stripping and rebuilding the unit between checks is extremely laborious.
.

It's roughly proportional to length, so soldering 25% of the length will give a 25% increase in current. I wouldn't go past 30%.

 

[Jonah]

Thanks, I'll have a look at that link.

 

[flecc]

It's roughly proportional to length, so soldering 25% of the length will give a 25% increase in current. I wouldn't go past 30%.

It's rather risky soldering the shunt though. With the board encapsulated and sealed into the crankcase half there's no access underneath where the shunt is soldered, so care is needed not to damage the shunt connection.

Just binding across with wire works, but a careful quick tack of solder with a hot enough iron could secure the wire, though I didn't do that.
.