There appears no charge balancing circuit between cells??.ww

 

So what is the actual price ready to drop in to a Crossfire?

 

i put this on here to show a great upgrade i was doing . if others were interested to help them do it . wasn't planning on building batteries for others do to time constraints . well be glad to post more pictures and a parts list that i used .

cells costs $95. plus shipping . other parts come out to about $25. its not hard to do probably 3-4 hours to assemble and install first timer .

 

Understood.
On your ebay listing for 6 at $48, the last picture shows connector bus bars with bolts, but your pictures on the forum show some sort of clip thing.
If I order 2 sets of the 6, do I get the clip things that you used ?
I found the ammo box and external battery posts already.

 

How do you suggest 1000+ amps from a 11ah battery with a c of 7. Max10c.

Also 11ah in a pair string would have 22ah capacity which is very small capacity. Id not think this can crank car much at all and with headlights on your gonna be dark in less than 1 hour.

Please explain. Woody

 

yeah i was posting pictures of different ones we have done and different connection methods . my partner built all those copper clamps , very time consuming . i use body clips i ordered on ebay . just fold over the tabs and slip on the clips , pretty easy . if someone wants to do over kill they can put screws thru the clips and make the connections even tighter . Also one of the other pictures shows one we potted in with black potting material .
i just ordered more clips on ebay . if i have some i will send them to you or give you the link . if you order them directly from me i can save you some on shipping . just paypal me 95. for the cells and $15 for shipping (110 total ) i prefer friends and family so paypal doesn't take a cut . i can ship fedex in one day. will upload more pictures in my gallery when i can figure out how!

 

Woody,
lithium cells are rated on continuous charge and discharge rates. these cells will go thousands of cycles at these high rates ( a lead battery would die in a few cycles at the high rates). but for shorter periods they can go much higher . if you go to lithium pros website their most popular battery for racing is the c680 it is an 11ah battery! for huge pro mod cars it is the l925 also 11ah , can you imagine starting a 500ci v8 racing motor with a 11ah battery ? they have been for years . now those are lithium iron , i have lithium titanate which can output considerably higher amps (go to wiki for more detail) we could probably get away with an 11ah like the lithium pros does but for a few dollars more you can have double the capacity , no brainer .( for $50 more you can have 3x the capacity if you want and it still only weighs 15lbs)!

as for reserve capacity if you take a lead battery with a rc of 115 min and convert it to ah (multiply by .4167) you get 48ah . now peukert effect tells us that if we drain a lead battery rapidly we get significantly less total power .so if we use a peukert calculator , put in 48ah battery , draw 48 amps out of it it will only last .461 hours for a total draw of 22ah's . this is fully discharged (you do this a few dozen times and your new battery and it is toast).

now a 22ah lithium will give you all 22amps in that same time (and it will do it thousands of times)
the lithium manufactures use a term LHA that gives a user a way to compare lithium amp hours to equivalent lead ah . for rough calcs its 2 to 1

as far as head lights i haven't timed how long they would work. my guess is about the same . but if i left my lights on and completely drained my battery to zero it would probably kill it . if i did it to an lto battery and left it at zero for a month , i could just jump start it and away i go with no ill effects to the battery.

mike

 

Kokam....Brilliant battery's, we have just installed 40 Mega watts at our power station continuously online in case one of our gas turbines trip. i know its a bit off thread. they really do have some grunt.

 

Where can a person buy those clamps that are shown in the pictures that connect the individual cell tabs? I searched around yesterday and couldn't find them. The tabs seem to be made very thin, almost like tin foil from what I see. Can you solder those clips and run wire to each? The wire I would think would need to be at least 12 gauge and then were the two 6 packs are connected together the parallel wiring would be about at least 6 gauge. Seems like those clips are essential to put this all together.

 

its aluminum so hard to solder /weld to . clamping works very well and is easy. these are the clips i use on my larger cells and am going to use on the 11ah now (was using a smaller clip but like these bigger ones better). get them on ebay out of friggen china , wish i could find a us supplier . ordered 250 a few weeks ago , when i get them i will send along with cells if wanted.

https://www.ebay.com/itm/20-Pcs-Spri...AAAOSwmtJXV4v2

here are pictures of connections we have used and a couple of batteries we potted afterwards for a super clean look .

 

here is one of the big ones i finished this weekend , 3 of these go in a gem car . 1.8kw of power in each box !

 

Mr Rockefeller, I just bought two of your six packs.

 

So a 100 total + shipping? I'm interested too.

 

Using one of these batteries does not make it OK to gain another 20 lb over the Christmas season.

 

I was admiring the photos of the red battery, it looks like the 65 Ah battery? Is that the one that you were using in the crossfire in pairs?

How are the batteries paralleled mechanically? Woody

 

how thin can they be made, I am wanting to change out the capacitor behind passenger seat, been thinking about a odyssey pc680 7" x 3" x 7.5" and either just hooking strict to the agm under hood or with a battery isolator.
using for my stereo, always used batteries before been trying capacitors but not much luck, with only this one smaller battery will probably have to hook to battery and not with isolator.
ideas for me with the lithium?
or if I change the agm under hood to the lithium and have the better capacity and discharge rate would help the stereo but the risk of cold Temps and battery problems not good for me, since I am 2 - 4 hours from home every week, and would suck if went out on go home day

 

sorry guys for the slow response , i have a house full of relatives for christmas .

Woody,

the big orange ones are 11s1p 25v 65ah packs that go in the gem electric cars we replace 6 31 series gel batteries that weigh 420lbs with 3 of these that weigh 140lbs total ! the gem have farther range and because of the lower voltage sag are much faster . And we do it for the same cost as new gels .
mike

 

trying to make sure i understand your question properly . you are using an additional booster battery or capacitor for your high draw stereo ? if that is the case you could build a thin one , mount it behind seat and hook it to main battery thru an acr relay that would connect batteries when engine running but disconnect when engine shuts off .

or build one that has 18 cells instead of 12 . this gives you 50% more capacity . plus these will supply higher voltage to your system so your amps will put out more power ( you'll notice lots of manufactures rate their amp output watts @ 14.0v input )

feel free to pm me or call and we can go over options (i used to install large commercial sound systems so have a fairly good knowledge of audio)

mike

 

i have got multiple pm's about purchasing batteries and some of you have bought them on ebay , so i put together 2 options to make this easier.

buy the 12 cells directly from me (either send me a check or use paypal friends and family)
with the fees i save from Ebay and paypal i can include:

12 cells
spring clips for assembly
jst 9 connector for cell monitoring/ balancing (probably never need it but nice to have)
small wire terminals
small tube of Anti oxidant for connections

price 95. plus 15 shipping fedex

Option #2: Semi assembled battery

we(my 14 year old daughter and self) well pre balance the cells and assemble them.
put them in an mtm plastic box and attach the monitoring wires.

I realize that some of you may not feel comfortable assembling cells so created this option (and my daughter is trying to earn money for a car!)

you will still need to decide which end terminals you want to attach and will have to cut the plastic box accordingly . this requires no electrical knowledge and is easy to do.

cost $135 plus $18 shipping Fedex . will need a few days time to balance and assemble an order .

my direct Email and paypal account is "WMGCEO@gmail.com"

I also want you guys to know that i didn't do this to sale batteries and make a bunch of money(not enough profit in this to even cover my time) i posted this because i thought it was a great upgrade . So many others have contributed to this forum and i have benefited , this is my contribution to others . cant think of another way to get this much weight out of our cars for such a low price .( if someone knows of others please let me know so i can do those too!).

If for any reason your not happy with these you can send them back for a full refund (minus shipping) anytime , for any reason , batteries , used cells doesn't matter .
This offer is only good for 30 years , after that i will probably be dead and i don't know if my kids will still honor it

Happy light weight motoring!

 

TY for reply.
My main amp if I go a 1 ohm draw has a tested wattage of 1945 watts, I am running in 2 ohm now, in 2 ohm with 4 awg wire and stock alternator it is way to much draw and need the reserve capacity and ah for batteries or a much larger capacitor, just get tired of messing with them.
Part of the reason for the larger amp is my long drives and cooler running amp.
But occasionally if I tired I will turn it up to keep my a$$ awake.
How will these cycle with the high charge and discharge rate?
Will they build alot of heat?
Think just running the 6 cells instead of 12 for the thickness will be plenty?
Or do 2, 6 cell packs, making a 8"x8"x2.25" pack, there is enough room behind seat to make a 24 cell 8"x8"x4.5"

Haven't messed with a acr relay.
Suggest that over just wiring direct or a battery isolator (alternator charges 1 battery at a time)
I have 4 gauge wire now, but will step it up to 2 awg when I install my 180 alternator I have at home.