86 Amp Hour Battery

[mikem]

The site below lists a battery that claims 86.4 amp hours. It weighs 62 pounds and measures 12"x6"x9". Price is $210 plus shipping ... which should still keep it under $300 to most places I'm guessing.

Anyway, this seems to be about 3 or 4 times the amp hours than most ebike bike batteries are rated for. Has anyone tried this type battery on a bike?

http://www.affordable-solar.com/8g27.deka.battery.mk.gel.cell.86.amp.hr.htm

http://www.affordable-solar.com/deka.mk.batteries.htm

http://www.affordable-solar.com/concord.batteries.htm

http://www.affordable-solar.com/solar-batteries.htm

 

[loquin]

it's a 12V battery. Most ebikes use at least 24v, usually 36v, and sometimes 48 volts.

So, you would need 2, 3, or 4 of these batteries. (total battery weight, 124 pounds, 186 pounds, or 248 pounds.

There's a reason why ebikes use smaller capacity batteries, and that is it... you just can't lug around that much dead weight.

 

[mikem]

Small Rider + Big Battery = Long Range?

it's a 12V battery. Most ebikes use at least 24v, usually 36v, and sometimes 48 volts.

So, you would need 2, 3, or 4 of these batteries. (total battery weight, 124 pounds, 186 pounds, or 248 pounds.

There's a reason why ebikes use smaller capacity batteries, and that is it... you just can't lug around that much dead weight.

Thanks loquin. I wonder if it would work for a 150 pound rider on a trike or heavy duty Worksman type bike? Total weight could still be in the 300 pound range.?

 

[AussieJester]

Thanks loquin. I wonder if it would work for a 150 pound rider on a trike or heavy duty Worksman type bike? Total weight could still be in the 300 pound range.?

I couldnt imagine how badly it would handle, running 4x12volt 20ah batteries on my trike is bad enough IMO AND thats on a custom made frame ALOT heavier duty than anything comercially available, i don't think the weight of the batteries on your 'standard' store bought trike would be very advisable, i think it would stress the frame a liiiil too much to be safe...then add the weight of the rider on top of that then the forces when your actually in motion, hit a pot hole the wheel would instantly collapse, they simply aren't made for the weight/forces that they would be put under with this amount of 'cargo' on board to top it off MOVING that wieght would eat into those gloriously high AH's anywayz, prolly end up better off with less amp hour and half the weight in the long run anywayz? be AWSOME of they were a 48volt battery instead of 12 volt, id grab one and charge it once a week hahaha

 

[mikem]

I couldnt imagine how badly it would handle, running 4x12volt 20ah batteries on my trike is bad enough IMO AND thats on a custom made frame ALOT heavier duty than anything comercially available, i don't think the weight of the batteries on your 'standard' store bought trike would be very advisable, i think it would stress the frame a liiiil too much to be safe...then add the weight of the rider on top of that then the forces when your actually in motion, hit a pot hole the wheel would instantly collapse, they simply aren't made for the weight/forces that they would be put under with this amount of 'cargo' on board to top it off MOVING that wieght would eat into those gloriously high AH's anywayz, prolly end up better off with less amp hour and half the weight in the long run anywayz? be AWSOME of they were a 48volt battery instead of 12 volt, id grab one and charge it once a week hahaha

Thanks Jester. Always good to hear from the guy who owns one ... especially when that guy built one too!

However, on paper, this still seems like it might be doable so I hate to stop dreaming just yet. What do you think of this ...

Worksman says their trikes can handle a 550 pound load. Here's their site:

http://worksmancycles.com/shopsite_sc/store/html/movers.html#M2626-CB

So, though it would be pushing it, even with a fat old 200 pound guy like me there would be room for a couple hundred pounds of battery and still be more than 100 pounds under the bike's limit ... theoretically, anyway.

Now I know you wouldn't want to hit a pot hole with a "tank" like this but barring bad road hazzards do you think there might be any potential here? Would this kind of weight cancel out the advantage of having a 175 AH power pack?

 

[ozzyu812]

Last year I saw a few builds with car batts. I don't know how sucessful they where in the long HAUL.

 

[JinbaIttai]

When you have that much weight on it and you have to add even more weight to beef everything up, it is getting to the point where there is no way it can be pedaled without constant assist--and the pedals are more of a decoration. At that point it it closer to some other kind of electric vehicle than an electric bicycle, so may as well abandon the bike part of the design.

 

[AussieJester]

do you think there might be any potential here? Would this kind of weight cancel out the advantage of having a 175 AH power pack?

Yes it would be doable but as previously suggested it would handle like poo... thats an awful lot of weight to be stopping also, how do you think the 'standard' brakes would cope with this? I put 4 disks on my build (twin rotors up front and one on each rear wheel) too pull the heavy weight up, it works well but i wouldn't like to try it with v-brakes or worse a coaster brake...I think the added weight would impact GREATLY on the large amp hours also, take alot of energy to move that trike piled with the weight...RE: car batteries...they dont handle the constant fast draining as per what happens in e-bike use and in the "long haul" which won't be that 'long' their capacity (ability to hold charge) would rapidly diminish...Personally, I believe 4 or 6 20ah 12 volts in series will be a better solution :: wink :: Please bere in mind this is only MY opinion and you shouldn't take it as "gospel" my all means be the 'pioneer' and see how it does perform we might all be wrong ;-) Best of luck anywayz buddy...

KiM

 

[HoughMade]

... you just can't lug around that much dead weight.

That's what my wife says.

 

[duivendyk]

This rating of batteries by AH is not all that informative,if the voltage is not quoted also.It would be much better if the energy storage was listed (Watthour rating).That would allow better comparison ($$/WH) or WH/lbs between batteries regardless of battery voltage.