Lithion battery bulk buy

[threedogs]

Was just thinking what if we had expressions of interest on bulk
buying for Lithium DC batteries. Ive heard they are half the weight
of say a SLA battery.
This would need to be on a state buy state buy as freight would be huge
say from east to west coast.
Something to think about Id be up for it depending on price

[Rossco]

I would be interested, been thinking about Lithium for my next deep cycle and mine has been long in ther tooth for a while. They look very attractive for this application however I'm far far an expert on this subject.

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[threedogs]

Agree early days , would need someone with some knowledge on them first.
Would a 150 ah be possible for a 4x4 application??
Like LEDs,, these batteries are the future IMHO but at what cost??

[Hodge]

I'd be interested, but I'm very naive when it comes to these. Would like some opinions about this though if anybody knows.
The only real world application I know of is my mate has a 120AH itechworld I believe it is unit in his y62. And he swears by this thing.
Apparently it doesn't drop volts much, weighs 13-14kg from memory and has a inbuilt battery system thingie into the battery.

[the evil twin]

I'd be interested, but I'm very naive when it comes to these. Would like some opinions about this though if anybody knows.
The only real world application I know of is my mate has a 120AH itechworld I believe it is unit in his y62. And he swears by this thing.
Apparently it doesn't drop volts much, weighs 13-14kg from memory and has a inbuilt battery system thingie into the battery.

iTech are a local mob over here and make/sell really high quality stuff.
Their Lith Jump Starters are top notch as are their batteries and at approx 8 hunjy not that bad a value(there are cheaper Liths around tho in the $500 range).
Main advantages of Lith are (rounded out);
-greatly increased current delivery capacity (a little dinky one will spin a wacking great V8 deisel)
-almost double the effective power for same physical size
-almost double the effective power for same capacity
-3 or 4 times or more effective life
-between 1/3rd or 1/2 the weight for equiv Lead Acid
-if fitted with internal balancing ccts etc (like the iTech) can be charged by Car Alt, Solar etc etc without any dramas

[Hodge]

-if fitted with internal balancing ccts etc (like the iTech) can be charged by Car Alt, Solar etc etc without any dramas

Thanks for clarifying all that!

So do you know, if the itech battery, having that in-built management system, would have no dramas being charged by a dc/dc charger ? As in, the two would not interfere with one another? For example i have the Ctek d250s unit. I could just replace my AGM with one of them lithiums and off we go... ?

Does the unit inside the itech battery just takes care of lithium side of things, whatever that may be. It doesn't boost charge like a dc/dc charger does or ...?

The reason I'm asking , is my mate has one of them redarc manager units, 30A, which is a dc/dc charger and a whole lot of other things. He ran a 140AH AGM off that.
When he bought the itech lithium battery, his auto elecy questioned whether it would work, because then youve got two management systems in series.

But so far he's had no issues I'm lead to believe. Apart from messing with some battery shunt and blowing up a lot of components, which is another story.

[Brissieboy]

There are a few things to be aware of with lithium:
- they start degrading as soon as they are made: will only last up to two or three years from the date of manufacture regardless of how they are used/abused.
- they are very sensitive to high temperature: causes them to degrade much faster than they normal.
- if you completely discharge a lithium battery, it's buggered.
- if you overcharge them they can become very hot and may burst into flames (or at least be severely degraded if not buggered).
- they should have on-board battery management.
- and there is a small but very real chance that a failed lithium-ion battery pack will burst into flames.
and there maybe more . . .
The onboard smarts is primarily intended to maintain a balanced charge state (cell voltage) across all cells as their individual voltages will vary as the cells each age slightly differently. Without this, the battery is at very high risk of catastrophic failure. DO NOT USE AN UNBALANCED LITHIUM-ION BATTERY unless you really know what you are doing.

[Cuppa]

There are a few things to be aware of with lithium:
- they start degrading as soon as they are made: will only last up to two or three years from the date of manufacture regardless of how they are used/abused.
- they are very sensitive to high temperature: causes them to degrade much faster than they normal.
- if you completely discharge a lithium battery, it's buggered.
- if you overcharge them they can become very hot and may burst into flames (or at least be severely degraded if not buggered).
- they should have on-board battery management.
- and there is a small but very real chance that a failed lithium-ion battery pack will burst into flames.
and there maybe more . . .
The onboard smarts is primarily intended to maintain a balanced charge state (cell voltage) across all cells as their individual voltages will vary as the cells each age slightly differently. Without this, the battery is at very high risk of catastrophic failure. DO NOT USE AN UNBALANCED LITHIUM-ION BATTERY unless you really know what you are doing.

I know folk with Lithium (LiFEPo4) battery systems in RV's which have been in use for 10 years!
There are a variety of different types of Lithium batteries - those that have burst into flames are not LiFEPo4, I have never heard of LiFePo4 doing so, it's a myth.

Really the only thing I agree with in this post is that LiFePo4 batteries need a BMS (Battery management system).Some 'drop in replacements have a BMS built in.

I am not totally up with LiFePo4 batteries, but they will be the type I purchase when I next need some. More for weight saving than for their exceptional recharge & provision of high current for coffee machine, hairdryer etc. Generally they can be taken down to around 20% SoC safely, & will still provide full voltage at that level. They will accept pretty much whatever charge you can offer them (unlike Lead based batteries) so can be recharged much quicker with the right gear. They also prefer, if being left for long periods in storage/unused to be left in a partial state of discharge - 50 to 70 SoC is good & have virtually no self discharge.

If anyone is interested in seriously following up on using Lithium Batteries in their vehicle I suggest you get in touch with a very good friend of mine in Mannum SA. He has a small company making up custom LiFEPo4 battery packs & BMS for anything from vehicles, boats & off grid house systems, & has been involved in the Lithium game far longer than most of the big name companies. His name is Terry , known to friends as T1 & his business is T1 Lithium . I would expect this to be a cheaper solution than 'drop in replacements, although prices on drop ins is probably coming down now ...... but there are reasons why they are not a great idea - primarily centered around many of their BMS which may well result in shortened life. If you do make contact with Terry it won't do any harm to let him know it was at my suggestion.

I may be wrong, but I suspect that bulk buying Lithium battery packs may not be a practical idea. Because of their higher cost it makes sizing them for each application more important.

There are companies who sell 'standard sized' set ups including everything from solar panels through to the batteries - but they are not cheap. Looked at a 300Ah Enerdrive system online recently. Looked like a great bit of gear, but cost a cool $12,000!

[threedogs]

Maybe @Cuppa may know a bit, maybe the technology
isnt there yet, Im like everyone else havent got a clue.
At least now we can talk about it and possible gain some knowledge
along the way.

https://www.ebay.com.au/itm/100Ah-12...frcectupt=true

[PeeBee]

Bugger, only just bought 3 AGM's a couple of months ago - all up 120KG's!!!