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Battery Wiring with Battery Management System and Fuel Gauge

physwiza

Apr 1, 2023
1
Joined
Apr 1, 2023
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I am building a portable monitor. It takes 12V 3A. I found a li ion battery that I like, AFTERTECH PACCO BATTERIA PILA 12V 4200mAh 4,2Ah RICARICABILE AL LITIO 95x60x20mm F2D3 https://amzn.eu/d/33mkhP0

It has the safety BMS but no fuel gauge so I can’t have a battery level indicator.

I looked at how to get one and found this video

Which is good for one cell but doesn’t explain how to incorporate a BMS at the same time.

I looked for a board that would do everything, charging and discharging, BMS and fuel gauge but couldn’t find anything.

Has anyone built a battery powered device with a battery level indicator and how I can wire it up? I want a fuel gauge because all online resources are saying that for LI ion the old voltage tracking methods aren’t reliable.

Any advice would be appreciated
 
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