Simplest 3S or 4S lithium ion protection circuit?

[eccerr0r]

Re: Simplest 3S or 4S lithium ion protection circuit?

Too expensive

I don't think I'd pay more than a buck or so for dead packs, and less than that prorated for questionable individual cells (on the order of a dime or so.)

So I'm cheap... next?

[sam_sam_sam]

Re: Simplest 3S or 4S lithium ion protection circuit?

Yes you are real cheap but if see something like that I will PM you about it

[eccerr0r]

Re: Simplest 3S or 4S lithium ion protection circuit?

Hey, if people can get people to "recycle" their old battery packs for free, why can't I join in the fun? :-p

[sam_sam_sam]

Re: Simplest 3S or 4S lithium ion protection circuit?

You might find this USB charging board interesting

https://www.ebay.com/itm/5V-1A-USB-3...53.m2749.l2649


I bought some to try out

I will post the results after I do some testing

[eccerr0r]

Re: Simplest 3S or 4S lithium ion protection circuit?

Looks like for 1S, and it's limited to 500mA output?

[sam_sam_sam]

Re: Simplest 3S or 4S lithium ion protection circuit?

Looks like for 1S, and it's limited to 500mA output?

If scroll down to the details of the board it says 1 amp unless you charge and discharge at the same time then it is 500ma


When I test this board I will post the results and let you know what it really is

[eccerr0r]

Re: Simplest 3S or 4S lithium ion protection circuit?

500mA doesn't do justice these days... hoping for at least 1A preferably 2 or more...
Then again 500mA is better than 0, I had a box that shuts off charging when itself is being charged...

[budm]

Re: Simplest 3S or 4S lithium ion protection circuit?

Funny Chinese spec:
input Micro USB rated at 5V 0.62A
USB output rated at 5V 1A

[eccerr0r]

Re: Simplest 3S or 4S lithium ion protection circuit?

Yeah, it looks like it charges slower than it can discharge?

[sam_sam_sam]

Re: Simplest 3S or 4S lithium ion protection circuit?

Well here is some results for the USB charging board that I posted earlier

The one thing that is nice about this board is that it has a LED that lights when you have a load on it

But I think it has a few small problems the first one is that when you charge and have a load on it at the same time the charging current drops down to 350 milliamperes and a load I could not see how many milliamperes it was putting out because my tester was in the way but the board gets warm fast

When you have a one amp load the board gets warm fast but it put out one amp
When you just have the charger on it only it charges at 500 milliamperes and board is some what warm but nothing to worry about

So in the end results are if you keep the load under 750 milliamperes you might be alright
If you do not try to charge and have a very big load on it you might be alright

Is worth the money I paid for maybe depending on how and what I want to use it for

If I use it on non name brand batteries and not put a heavy load and do not care how long it takes to charge and do not want to spend a lot of money on test of concept yeah this fits the bill

[Tarpey]

Re: Simplest 3S or 4S lithium ion protection circuit?

Do you think a setup like that will become cheaper to build anytime soon?

[sam_sam_sam]

Re: Simplest 3S or 4S lithium ion protection circuit?

This will tell you the status of the batteries that you are working with

I found this that you might be interested in

https://banggood.app.link/ediAr9t6v2