I want to charge 3 18650 lithium ion cells in parallel from a usb port. I want to power my project from either the internal batteries or an external power bank. I want to be able to charge the batteries while at the same time powering my project. I would like to track charge level, current draw and time remaining. The project will average 600 mA with surges up to 4A. The circuit shall protect from overcharge, overdischarge, and thermal protection.
20 freelancers are bidding on average $177 for this job
I already have worked on a system like this for a personal project for my university's final project. For the amount of 110CAD i can provide you schematic, working principal, PCB and what parts to get.
i use Lipo cell in many robots and charging ,discharging , overcurrent ,shot circuit protection, EMI protection ,thermal protection, level indication and much more.i can do it easily.
I can help perfectly in your task. I have knowledge about pcb design and electronics. Also i did this kind of projects before. Could you share more details please?
I have experience working with Electronic Vehicle, I have knowledge of BMS, battery charging- discharging , over current, over voltage and thermal protection methods. Revert back for more clear idea of your project.