Lithium 12 volt battery Is there a clear leader?
Stick the battery in
Connect the wires
And the battery has a management system built in
Is there a favorite?
Connect the wires
And the battery has a management system built in
Is there a favorite?
Forum Discussion
- AMAZON?
MEAN WELL
RSP-500-5 AC/DC Power Supply Single-OUT 5V 90A 450W 13-Pin
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Price: $103.30 & FREE Shipping MEXICOWANDERER wrote:
Ahhhhh...
Ah cheap as in "Honey, forget Taco Bell's 99 cent special. Tonight we dine at Costco's food court".
I think you have a good grasp on CHEAP. :)MEXICOWANDERER wrote:
Huh?
AMAZON?MEAN WELL
RSP-500-5 AC/DC Power Supply Single-OUT 5V 90A 450W 13-Pin
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Price: $103.30 & FREE Shipping- "Lithium 12 volt battery Is there a clear leader?"
He's looking for a transparent battery in 12V lithium. MDKMDK wrote:
Battle Born. 12V 100aH X 2.
Second !- Lithium versus lead acid? Pros? Cons? Whys? Why nots?
https://www.youtube.com/watch?v=UfMROVzjVWU GordonThree wrote:
Cheap is build your own. It's rocket science, but only a little, I think you'd do a great job.
This is true, but you have to know one very important thing. Use LiFePO4 cells and NOT LiCoO2 cells ! BIG DIFFERENCE !
LiCoO2 cells are what is commonly found in most electronics theses days. The standard size is 18650 (18mm x 65mm). Even LiPo batteries (flat, soft or hard side) use this chemistry. LiFePO4 cells are safer (they will not explode or burn if over charged or shorted) than LiCoO2.
The problem is finding a good BMS for LiFePO4 cells that can handle high current charging and discharging.GordonThree wrote:
Cheap is build your own. It's rocket science, but only a little, I think you'd do a great job.
Hardest part is buying a bulk pallet of recycling batteries, disassembling the packs and weeding out the cells that are still healthy. Then you can combine them 3 or 4 in series, and as many in parallel rows as you desire. Cost goes up a little if you buy pre-screened cells, or way up if you buy new cells.
The maintenance circuits are pretty much standard equipment now from our friends on the other side of the Pacific. Charging is getting easier now, just supply constant voltage at 4.1 (or 4.2) Vpc and let 'r rip, the maintenance circuit will disconnect cells as they hit full.
If we're talking about Lifepo4 chemistry than 4.1 vpc will cook them or shorten their life. 3.65 vpc, jury still out if this will shorten life some even though most those drop in producers recommend charge 14.4-14.6v (3.6-3.65 vpc).
Mine which aren't drop in charge 3.55 vpc (14.2) max. Helps greatly to have a charging source that can be adjusted and not the on size fits all.- Hi Mex,
Price.
https://www.ebay.ca/itm/202396378794 $1350 Cdn for 200 amp-hours @ 12 volts.
They have a 400 amp-hour one as well.MEXICOWANDERER wrote:
Is there a favorite? - In my earlier post, I was not talking about LiFe batteries. I'm not a fan of that chemistry, and either is Tesla. If I recall correctly, they use regular 'ol LiCo right now but are looking at switching to NMC down the road.
Would I tell someone unskilled to build a big LiCo battery for their projects, no.
Just because it's home made doesn't mean it can't be "dropped in" ... The only reason the LiFe are drop in is because A) they're underpowered from what they could be and B) the manuf is relying on the chemistry to tolerate abuse from a lead acid charging system
Check out Jehu Garcia on the YouTubes... he's no rocket surgeon but that doesn't stop him from building his own LiCo Powerwalls. It doesn't hurt that he owns a battery recycling company, so he has a lot better access to cells to cherry pick from.
Jehu Youtube Channel
