Charge Li-ion battery pack?
I want to assemble a battery pack, will either a 3s3p or 4s3p.
How can I recharge the battery pack? I have searched for eternity for a solution. The only solution I've found so far is that I use an RC charger. In principle, there are also many bad devices (or even fakes), which then just catch fire: /.
So safety is at the top!
I would prefer a solution ala laptop charging cable. So that I can load it on the way sometimes.
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So, look for a safe and if possible compact solution to charge my battery pack.
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Addition, because I'm in the process, can one of me recommend a reasonable BMS? Smart function would be cool, but not necessarily. Probably the "Samsung INR18650 25R" will be used. Well, maybe I'll take others, too. In principle, I do not need 20A discharge current, 5A-10A should be enough, only the 25R should be very good, so this.
I would like to build a portable speaker, so I really only battery life and volume (5A-10A output important.).
So if safety is important, I would take LiFePO4 chemistry…
Balancer and charger, you can quickly tinker yourself…
or you take as a charger any CV / CC DC-DC converter from amazon (or so) …
As a balancer, you could connect your DC-DC boost converter (again from Amazon, but cheaper) to a too full set of parallel-connected batteries, which then injects its voltage into the 48Vdc home network… You would need a neat meter to do this Finding cells that are too full…
for LiFePO4 there are also massively good individual solutions… But all in all (including solar panel input) is obviously difficult to find… https://www.youtube.com/...ery=lifepo
I have already worked with such boards for such cases and found them quite well:
https://www.ebay.de/...3208164299
As an input, you could use a USB cable or just (as already mentioned) to run the laptop cable over a DC / DC converter.
I can only recommend the Samsung 25R. They are very cheap, reliable and deliver what they promise.
Here, you get everything you need and in reasonable quality.
https://shop.lipopower.de/Akkus-Batterien
Also, there are chargers in reasonable quality. (also with 12 V or more, input)
With a USB charger, you can load any 3 or 4 s batteries anyway, because the voltage is not enough.
High performance and good sound on the speaker means high battery voltage… With 5 V you will not get anything wrong…
I miss this charger there.
Yes, there you are right - but I'm not the owner of this shop - I just order my stuff.
