#7) Project ForkenSwift electric car: battery pack hot swap!

by on 2010/02/13


www.forkenswift.com - Just for fun... Q how long does it take to swap out the car's 8 batteries with a fresh set? A: a lot less time than it takes to recharge them!

{ 25 comments… read them below or add one }

aleon1018 February 13, 2010 at 6:33 AM

So easy, even a Canadian can do it.

ForkenSwiftDotCom February 13, 2010 at 7:16 AM

30 to 35 km at city speeds. See the web site for more speed / distance info: ForkenSwift-dot-com

diymania February 13, 2010 at 7:46 AM

So how far is it practical to drive with this car ?

ForkenSwiftDotCom February 13, 2010 at 8:35 AM

No – we intentionally chose the cheapest & lightest car we could find (both criteria happen to align frequently with old Metros). FYI, it weighs in at around 1700 lbs in gas engine form.

ForkenSwiftDotCom February 13, 2010 at 9:23 AM

They’re Exide GC-5 225Ah 6volt flooded lead acid golf cart batteries.

DarkLinkAD February 13, 2010 at 10:14 AM

Did you concider the old corolla, with its heavy iron block weighing in at 2200lbs.
Theres a lot of weight to be saved on this vehicle also.

DarkLinkAD February 13, 2010 at 10:42 AM

Would you say, a Fork Lift motor would be best electric motor of choice?
Are you using a Long FDR or Short?

DarkLinkAD February 13, 2010 at 11:25 AM

Keep looking out, Solars becoming increasingly inexpensive.

4063614 February 13, 2010 at 11:57 AM

Do any body know what type of battery and what is the voltage and ah for each battery.

sixmagpies February 13, 2010 at 12:35 PM

It is only chaps like you who will, eventually, manage to shame the cynical establishment (‘OIL Co’, GMC.etc ..and ‘their’ Government.) into offering appropriate products at a sensible cost ….. a technology which YOU have proven is quite possible as it’s already here. Keep fighting the good fight.
“Evil prevails when good men do nothing”.
Well done sir.

Blown75 February 13, 2010 at 1:30 PM

Great sequence of videos… you truly show it can be done and that as the project progressed more and more safety and acceptance for home builders is happening.. Nice work

UrbanSavvy February 13, 2010 at 1:33 PM

I must commend you on your ingenuity. Keep up the good work. I’m about to do a similar project with a dunebuggy.

ForkenSwiftDotCom February 13, 2010 at 2:00 PM

You’re welcome! And you’re right: need to post some details about performance. It’s pretty unimpressive on 48v with a 400A controller – 25 seconds to 50 km/h (30 mph). Solar would be sweet – super expensive, and won’t contribute much to the total distance driven, but fun nonetheless.

ForkenSwiftDotCom February 13, 2010 at 2:02 PM

The “new” batteries are really just a set of slightly less dead, used batteries. In warm weather we’re getting around 25 km per charge from them. No plans to upgrade the motor – it can handle much more voltage. We *may* up the pack voltage a little.

drumzz2109 February 13, 2010 at 2:24 PM

That is simply amazing. Thank you so much for the inspiration to get my project started. Great job. Pehaps a chapter on performance(Speeds, distances, etc). Ever thought about adding some solar panels to help keep that charge? Excellent !!!!

MikPil February 13, 2010 at 2:24 PM

VERY COOL!
Have you gaged the total distance for driving and road time yet with new batteries? Also, will you ever change out to a bigger motor? Keep us posted

ForkenSwiftDotCom February 13, 2010 at 3:01 PM

Haha! Because my chauffeur stayed in the car while I swapped batteries! ;-)

cant7think7clearly February 13, 2010 at 3:37 PM

But why did you get out of the passenger side? Hehehe. ;)

silverbolt90210 February 13, 2010 at 4:10 PM

Nice Job. Sergio form Brazil

ForkenSwiftDotCom February 13, 2010 at 4:27 PM

Yup. There was only one big one – we’re using it as the emergency disconnect via the clutch pedal.

spootyrat February 13, 2010 at 4:46 PM

Did you save those big battery connectors from the forklift? (C:

Nichen February 13, 2010 at 5:39 PM

Friggin great idea dude!!!

Nextwave1980 February 13, 2010 at 6:22 PM

Very nice! just need to get some quick disconnections on it like a paintball gun and u can cut ur time in half :D awesome job!

EnigmaNZ1 February 13, 2010 at 7:09 PM

The new li-on batteries coming out can be charged from flat to 80% charge in a few minutes, so won’t be necessary. Its that last 20% that will take the time, that can be done at home.

ThumperBunny43 February 13, 2010 at 8:08 PM

Very cool! In the future there could be a network of places to swap batteries and rent them and this would greatly increase range. Thanks for the vid.

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