Lipo to Li-Ion Upgrade swap

Hi Oscar,

Neither : ) You can buy a battery with built-in protection circuit and wires on the end, all pre-assembled reasonably well and partially safe (to a limited extent).

The ones without the circuit are intended for specialist use usually (such as to be assembled into a battery pack with specialist equipment).

1. So Shabaz, your saying the PCB attached to the Batt is a "Protection circuit" device ?

2. How would I discover the exact specification of the "Protection"  PCB ?

3. Where would I find a Li-Ion Batt with the maH spec I want, with the correct spec "Protection circuit" PCB ?

I've looked  around alot and havent seen any Li-Ion batts of 3.7v with any "Protection circuit" PCB's attached and for sale ?

Thorn

Thorn,

Here is an example of a Li-Ion battery that will meet your specifications.  Beware, there are a lot of fake batteries and/or claims out there.  Buy from a reputable seller.  (Note: these are listed as Protected in the questions and answers section of the listing).

Good luck,

Gene

Gene, Thanks for the response.

I think you forgot to post the link or address to the batt you are recommending..

And I've see a few vids on fake batts. I agree with you there.

Hi Oscar,

I also agree with Gene, that's the best advice possible, get it from a reputable source, and they will state if the battery is protected or not (either on the web page or the datasheet).

Often the ones with wires attached will have the protection circuit built-in, but the seller will specify it.

If you're not buying a battery to fit a holder then for your safety it ought to be a battery with wires attached, not those foil tabs.

Farnell/Newark has some, and TME.eu has quite a large battery range, and Farnell/Newark and TME.eu are in the group of reputable sellers.

You are so correct.  I guess I have had a little too much exposure to paint fumes today (working on staining my new deck).

Here is the link I was referring too:

https://www.amazon.com/liogea-LG3400G-3400mAh-Rechargeable-Batteries/dp/B07YBTQSQL/ref=sr_1_6?dchild=1&keywords=li-ion+3…

I tend to like batteries that are held in battery holders (replaceable).

I've already got some LG 18650 3500mAH batts I wish to use, so I'm trying to positively identify the protection device needed to

attach to my batts. 

Can anybody advise me on how to go about this ?

I went to the site you suggested.

The batts shown don't come with any "Holders" .

The brands are unknown to me.

Hi Oscar,

This is a specialist task done by manufacturers, for building batteries out of raw cells. They don't use a soldering iron for this, they weld the connections onto the cell. Your best bet is returning the cells (if you can), and in any case, buying cells with built-in protection (they come in the form of either either cylinder cells for battery holders, or with insulated wires [and possibly a connector] pre-attached). Some suppliers of such batteries were mentioned earlier.

The problem with your idea is I plan on building a  5 cell battery pack later on. But for now I want to start with just one cell. And I will either welding the protection/ BMS to the Batts or soldier them.

Again, my goal is learning how to identify and test the correct protection / BMS PBS for a given application.

Plus making my own cells is substantially cheaper them buying them.

So I have to learn whatever is necessary to make this happen.

The problem with your idea is I plan on building a  5 cell battery pack later on. But for now I want to start with just one cell. And I will either welding the protection/ BMS to the Batts or soldier them.

Again, my goal is learning how to identify and test the correct protection / BMS PBS for a given application.

Plus making my own cells is substantially cheaper them buying them.

So I have to learn whatever is necessary to make this happen.