I'm curious if using multiple TP4056 modules in parallel is a valid setup for charging three 18650 cells in parallel (1S3P configuration). Would this approach eliminate the need for a Battery Management System (BMS), given that the cells are always used together from the start with matched voltages? What are the potential risks or downsides to this method?
2 Answers
Honestly, I've never seen this done, and I’m not sure it’s the best approach. Why not just use a single circuit designed for the total current needed instead of juggling three? My main concern with the TP4056 is its ability to properly terminate charging if other voltages come into play. If you're powering something while charging, it could mess with the overcharge protection function. I've found this resource really helpful for understanding the TP4056—check it out if you’re considering this setup: https://www.best-microcontroller-projects.com/tp4056.html. Also, for a charger that handles 3A with a USB input, the IP2312 is quite affordable and efficient.
Yes, you can connect TP4056 modules in parallel to speed up charging when using them for three cells. However, keep in mind that they might heat up, particularly if you have several in a cramped space. You might want to check out the TP5100 instead; it runs cooler and charges more efficiently than the TP4056 since it's a switching charger. The middle module can get particularly hot if they're stacked together, so just something to consider!
That's good to know! Just to clarify, does that mean you can effectively manage three cells without issues?