Need Help, Going to buy Headway's fo the Big 13 Pulling tractor

5486 Views 31 Replies 12 Participants Last post by Jimdear2, Nov 9, 2010

Jimdear2

Discussion Starter · Oct 17, 2010 (Edited)

Need Help, Going to buy Headway's for the Big 13 Pulling tractor

PLEASE!
Looking for help and advice.

Well, the money's put aside and we are ready to buy 104 Headway 38120P batteries to power the 13 inch motor in the pulling tractor.

I'm looking for the best value since I'm retired. The $2000.00 or so is a big chunk for me so I have to get the best value I can.

The 72 volts we tried last season just didn't do it (of course the bad gearing choice I made didn't help

).

100 batteries for the tractor and 4 spares. (the 4 will probably be used as a 12 volt control battery)

We plan to go with 50S 2P to start off this year and next year we will be adding 50 more batteries as we prove out the systems and home made controller until we reach a total of 200.

Looking for advice from people who sell and/or who have bought Headway batteries.

I can wait a while since pulling won't start until May of next year. I'll also be building a Simon/Jack charger and we are looking at various balancers.

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Zuglet

· #22 · Oct 28, 2010

Re: Need Help, Going to buy Headway's for the Big 13 Pulling tractor

Jimdear2 said:
...we are ready to buy 104 Headway 38120P batteries to power the 13 inch motor in the pulling tractor.

I'm looking for the best value since I'm retired...

Hi Jimdear2,

I've been gathering data on various batteries for use in EVs and you might want to take a look at what I found. Go to the the list of batteries on the following page and sort by 'Watts (max)/pound.' The best batteries will appear at the top of the list. You can click on a battery to do some pack calculations...

http://www.zuglet.com/batteries/batteryList.php

The HeadWay batteries certainly offer the benefit of the screw terminals -- but, the maximum power density (per pound) is considerably (50%) better on the A123 and Panasonic Lithium batteries. You will have to put more batteries in parallel -- but, it might be worth looking into.

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Zuglet

· #26 · Oct 29, 2010

Re: Need Help, Going to buy Headway's for the Big 13 Pulling tractor

Harold in CR said:
...have you looked into the Nano-Tech R/C batteries from Hobby King ?? They are rated at 50C-to 90C discharge

Thanks Harold,

I hadn't looked at these batteries so I added one of the 6 cell packs to the list. These lithium-ion polymer packs come in above the A123 batteries when the list is sorted by 'Watts (max) / pound' -- they also rank real high when sorting by watt-hours / pound.

http://www.zuglet.com/batteries/batteryList.php

Thanks for the tip.

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