batteries

if 72 v system - seems I will need about 100ah

I should check out these links about LiPo

http://www.aeva.asn.au/forums/forum_posts.asp?TID=342&PID=2170

seems that LiPo would cost me $4000-5000


http://www.waeva.asn.au/batrun_tutorial.htm


from the spreadsheets - 15kWhr/ 100km seems to be what I would need.

this seems a bit strange as it is independant of vehicle speed.



quote from th thread above

As a general rule, work on 150-180 Wh/km for a light EV.

so for a 72V pack of 100ahr, I would get 48km if the batteries worked perfectly.

here is a sample calc

45 x 3.2v x 90Ahr Thundersky x 70% DOD x 1500 cycles = 13608Kw of power
If a battery pack costs $8000 that is a cost of $0.60 per Kwh
If my car gets 200wh/km that is a cost of 12c per km.


MY VERSION
25 x 3.2v x 90Ahr Thundersky x 70% DOD x 1500 cycles = 7560Kw of power
If a battery pack costs $4444
If my car gets 150wh/km that is range of 50km


also look at this site

http://www.evconvert.com/

the Aeva site has an entire forum on batteries

http://www.aeva.asn.au/forums/forum_topics.asp?FID=17

here is a link to the greensaver batteries that are talked about a lot.

http://www.greensaver-gst.com/product.php

AGM

AGM options - sounds like from the electric echo blog that I should wait a couple of years for Lithium polymer batteries. With a bit of looking, I should be able to get away with about $2000 for the battery pack. This should last me 2-3 years. Then the appropriate direction for Lithium may be clearer.

Remco AGM RM12-100

110Ahr or 100Ahr (1hr - ????) $355

sources

http://www.solaronline.com.au/cgi/index.cgi/shopfront/view_product_details?category_id=1107143916&product_id=1107358630

spec sheet

Fullriver

110Ahr (1hr - 60Ahr) - $305

spec sheet

http://www.fullriver.com/products/admin/upfile/DC110-12B.pdf

sources

http://allpurposebatteries.com.au/shop/product_info.php?products_id=267&osCsid=d9b0f94e064ff2fb19e9079145417db6

http://www.fridge-and-solar.net/agm.htm

BB batteries

This is the mob that thunderstruck ev suggest

http://www.bb-battery.com/productseb.asp

odyssey batteries

odyssey batteries - way too expensive

http://www.extremebatteries.com.au/pdf/ODYSSEY%20Specs.pdf

diamec

40Ahr (1hr - 24Ahr) $100

This looks a pretty good bet! - maybe 18 * 40Ahr Makes the wiring a little easier as the two packs in the back would be in parallel to the pack in the front. Then I can add more range easily (maybe in boot) by adding another 6 batteries.

Are there problems with paralleling batteries?

http://www.soanarecotech.com/products/?group=P19

Same batteries here:
http://www.electusdistribution.com.au/productView.asp?ID=6560&CATID=18&keywords=&SPECIAL=&form=CAT&SUBCATID=190

I have found that these two batteries discussed are diamec batteries - here is a spec sheet

http://www.semicom.gr/UserFiles/Specifications%20and%20Technical%20data(3).pdf

deka

The honda civic ev mob suggested deka batteres

here is their discussion
http://groups.google.com/group/civic-ev-kit/browse_thread/thread/4e5acb932c92f43f

here is where you buy them in australia - seems expensive

http://allpurposebatteries.com.au/shop/product_info.php?cPath=32&products_id=139&osCsid=5c74a240dad09a423732f68785581ac0

absorbed power

100Ahr (1hr - 64Ahr) $430

These were listed in the waeva spreadsheet - seem to have pretty good info

http://www.bcaaust.com.au/batteries.html

here they have some prices
http://www.agmsaustralia.com/agms/products/12volt/

Lifeline Batteries

http://www.batteriesdirect.com.au/shop/store.php?crn=230&rn=546&action=show_detail

Haze

6 of these? (probably not okay as they are Gel not AGM)

http://www.energymatters.com.au/haze-gel-deep-cycle-battery-12volt-100ah-n70-p-111.html?zenid=6e390defcf742955b0be1a9f78f7ba1b

other comments

have a look at the comment on here about types of batteres

http://a4x4kiwi.blogspot.com/2008/04/greensaver-silicon-batteries.html



Comment on AEVA that you should not discharge to 80% too often

http://www.aeva.asn.au/forums/forum_posts.asp?TID=301

Also don't count on discharging to 80%DOD everyday, your pack will have a very short life if you do, (280 cycles) Its best to size your pack so your not discharging below 50%DOD on a daily basis when using lead acid. You also have to take into account loss of capacity due to cold weather (i cant remember how cold it gets in SA).



waeva spreadsheet

here is the link to the spreadsheet
http://www.waeva.asn.au/batrun_tutorial.htm