Li-ion UPS battery substitution in UPS

Oct 18, 2022 Last reply: 3 years ago 62 Replies

My Li brick is 300WHr new (perhaps 250WHr used). 12V @ 27AHr

With an inverter, I can power a labtop for at least an hour, or 32 of them for a day.

But for less than $28. How much is your UPS?

It's essentially the same inside, just package better for data centers.

The current is not limited by the gauge of the wire, as long as it is short. A few inches of 16 gauge wire is not going to impact the voltage seen by the starter motor (4 mOhm per foot). At least, it will be on par with the internal resistance of the car battery, especially when it starts to get weak.

Yes, i am keeping the LA to handle the current surge, even if it's not holding much charges. The Li brick is connected with 5P #22 and is rated for 30A.

This paper gives an unbiased comparison of different battery chemistries used in UPS applications:

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To summarize:

  1. Most consumer batteries are sealed (LA or Li). So, can ignore Flood LA.
  2. Li has 3x energy density (weight and size advantages).
  3. Limited cycles for Li.
  4. Self discharge is less for Li vs. LA.

For EV:

  1. Li is good for main storage (400V).
  2. Not so good for stop and go low voltage system (12V).
  3. Ideal situation is using both for 12V.

This is both totally wrong and irrelevant for UPS batteries.

The topic concerned UPS, NOT EVs.

This is an unmoderated group. so Ed Lee can post what he likes. So can you, and you contribute even less than he does.

Don't waste our telling telling us about what you think he ought to have posted. We've already been exposed to quite enough of your foolish opinions.

I'm not complaining. I'm merely making an observation. You are the target of quite a few unflattering observations from people whose opinions I value more highly than yours, which is pretty much everybody. If you get your kicks out of being jeered at a clown, I can see how you might persist. You probably ought not to.

Hey Bozo, the "unflattering" comments, which I regard as a badge of honor, are all coming from YOU!

Who cares how you regard them. Your enthusiasm for "understanding" other people's opinions in a way that suits you is pretty comical, and might be part of your clown persona, if you had a enough sense to be able to create one.

Well, YOU apparently do as proved by the fact that you REPLIED!

There are other form of comedy, beside clowning. Ironic observation is one of them. Don't bother looking it up - you wouldn't understand it.

Sewage Sweeper didn't understand that one either.

See Bozo, there you GO AGAIN!!!!!

Published by AllCell Technologies LLC

Disclaimer: AllCell is a lithium-ion battery pack assembler with a proprietary method for battery thermal management. Information in this paper reflects AllCell’s experience in the market across a variety of energy storage applications.

Only a dope would introduce that as "unbiased".

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Get a LIFE, COVID!

Years back, there was an ambitious Wingman150 on the aviation groups. Authoritative, knowledgeable, he could give advice on airplanes and engines, determine that poor maintenance was to blame in accident cases, and everything. The group eventually figured out that Wingman150 was a kid, about 15 years old, and a complete bullshitter.

You’re how old?

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