shorai lithium batteries

Doing a 24v. two battery button start deal in my dragbike 1500 cc. 14-1. Main battery is 10ah 480 ca lithium ferrous battery that weighs 2.5 lbs. 4.5" X 4.5" X 3.5" , need to figure out #2 yet. Good point on the #6 cable and crimped & soldered terminals. Starter motor was rebuilt by Cashio and he recommends 17ah. w/ 24volts.minimum. Not enough battery power will melt the starter.

Good wiring diagram on schnitz's page to hook up 24v. starters.

Stu Pidasole wrote: shop.ebay.com/i.html?_nkw=a123+battery+m...p3286.c0.m270.l1313#

Hmmm... I went to the site and was genuinely interested, till I asked customer support about it and got this:

"Thank you for contacting sales at A123 Systems. Please use this Product Evaluation Form to tell us about your battery requirements. By filling out the Product Evaluation Form as thoroughly as possible, we can better respond to your request.

Please be aware that A123 is focused on high volume commercial applications and does not supply battery cells or systems for hobbyists and custom vehicle conversions."

They also went on to say that it is not necesarily a "recommended" application, and they make no guarantees against destructive accidental overcharging causing leakage/meltdown/etc.

The guy in the video appears to have a working setup, I just dont like untried/unproven by the company type products...

Meh - too bad.

ok, can i lay this on its side?



www.odysseybatteries.com/battery/pc680.htm

thanks adam. looks like the batt you showed will work great. 210 cca. less than 2.5" wide. layed on side is awesome to hide.

Rechargeable lithiums are very intolerant of charging method. They require a precise end of charge voltage and limited charging current, neither of which a bike's charging system can provide. They will die quickly used for a bike unless the charging system is completely redesigned. Li batteries are also VERY intolerant of temp variation and only work well withing about 10C of room temp. Beyond that, they lose capacity and require slower charge rates. They are a poor choice for auto/bike batteries.

bountyhunter wrote: Rechargeable lithiums are very intolerant of charging method. They require a precise end of charge voltage and limited charging current, neither of which a bike's charging system can provide. They will die quickly used for a bike unless the charging system is completely redesigned. Li batteries are also VERY intolerant of temp variation and only work well withing about 10C of room temp. Beyond that, they lose capacity and require slower charge rates. They are a poor choice for auto/bike batteries.

i dont know many others that ride in these temps....

:woohoo:

Maybe Shorai knows something I don't, but I'm skeptical. I worked on the development team that worked with Sony o develop the original rechargeable Lithium charging IC's and protection circuitry. Lithums advantage is lighter weight and good power density but their disadvantage is requiring RAZOR SHARP accuracy on the full charge voltage the charger holds them at as well as higher internal impedance than other battery types. They also did not charge happily at high or low temperatures and required protection from rapid charge at those extremes. If Shorai has a new Li chemistry that gets around those drawbacks, maybe the batteries will last. Time will tell, I am not in a hurry to be first to buy one.

I think we've discussed these here before, but maybe I'm thinking of a different forum. There's one of the GL1800 Goldwing forum guys that was given two of these to evaluate installed on a 2009 Goldwing and a 2010 Concourse 1400. He put these in right when Shorai released these which was around the end of 2010 I believe. So far so good, working fine, so they've lasted 5 months. I've had worse conventional batteries than that over the years.

i think the rep talks about 5 to 6 years under normal usage in this video.....

It will be interesting to see how they work out. This is a hot topic because "all electric" vehicles are being forced into Lithium technology so they can keep the weight low enough and also get usable mileage range. So far, not so good. The Toyota Prius has been using nickel metal hydride batteries with good results but they don't have the energy density to support full electric use, hybrid OK. One of my buddies was working in the all electric vehicle industry until recently, he thinks the battery technology is not there yet. The guy who comes up with a rugged (and cost effective) rechargeable Li battery will inherit the earth in that market. Cost is the biggest problem, as seen by the sticker prices on the new Tesla cars.