EarthX batteries

KevXR

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Jul 10, 2012
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Has anyone used them? A friend will be using it for a motorcycle, but it is interesting they have a built in BMS.
http://earthxmotorsports.com/
 
they say they use "American battery technology" well, which one?
A123 systems?
American components?
well sounds promising
 
I guess we could figure it out maybe ..?
$119 for 12v, 6 ahr, 12C capacity, using 4 x LiFePo4 cells,..assembled.
Say thats $80 for the bare cells or $20 per cell, = $1.00 per Whr

so, who makes a 6Ahr, 12C, LiFePo4 cell.. ?
 
A friend wants to put one in his motorcycle to run the starter. He doesn't want a dead battery or battery fire.
The battery packs with built in BMS seems interesting for bikes.
 
You could charge them with an sla charger, but you'd be better off to get a lithium charger that shuts completly off when done.
 
http://earthxmotorsports.com/products-page/thunderbird-1600-rocket-iii-2300/etx36d/

12v x 36ah = 432 W/h for a 1.5 KG battery ??

for example :
A123 20AH Pouch cell with 3,3v x 20ah is 66 w/h at 0.45 kg so for 432 wh A123 you need 6.45 KG ( without casing )

Impossible !
 
Bazaki said:
http://earthxmotorsports.com/products-page/thunderbird-1600-rocket-iii-2300/etx36d/

12v x 36ah = 432 W/h for a 1.5 KG battery ??

for example :
A123 20AH Pouch cell with 3,3v x 20ah is 66 w/h at 0.45 kg so for 432 wh A123 you need 6.45 KG ( without casing )

Impossible !

Yes.

I am finding batteries like these rated way over on ah.

They are rating them in sla ah because they are sold to replace sla ?

12v 10ah sla might do 6 or 7 ah so when they sell a 12v 10ah li ion replacement it will only do 6 or 7 ah too ?

I saw a new 12v 10ah B+B sla battery do 7.5 ah discharged at 3 amps once.
 
Bazaki said:
http://earthxmotorsports.com/products-page/thunderbird-1600-rocket-iii-2300/etx36d/

12v x 36ah = 432 W/h for a 1.5 KG battery ??

for example :
A123 20AH Pouch cell with 3,3v x 20ah is 66 w/h at 0.45 kg so for 432 wh A123 you need 6.45 KG ( without casing )

Impossible !

Yes, it is impossible.

That is just some marketing bullshit (sorry, no other word for that) created by shorai named "PBeQ", so that people could compare SLA type batteries. a 36AH "PBeQ" LFP means it can do the same CCA as a 36AH SLA battery. Not that it has a 36AH capacity. The real capacity is something like a third or a quarter of that, meaning you will most likely overdischarge the battery if you need the equivalent of a 36AH SLA.

I checked ballistic evo, earth X and shorai, but they all use chinese cells.

See this page for earthX :
http://earthxmotorsports.com/our-batteries/

They would really like people to understand "made in USA", but they write "assembled", "engineered", and in the end they are just adding a BMS and a casing around a chinese battery.


That is the reason i am going to test a pack made by nancy, with 4S4P 26650 cells. Should be way enough for race cars. I was convinced i dont need a BMS for a starter battery that gets disconnected when not used, and get an alternator producing approx 14V when running. I am going to test in real conditions, check balance after each couple of starting, check voltage sag and report my findings. This will take some time though.

I thing a 4S2P is enough for a bike. Big harley engines or high compression engines may require a 4S3P though.
 
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