[H6X] State of the build #2

A project log for [H6X] POD (2021 Hackaday Prize Entry)

- your companion for the next Apocalypse - AirQualityIndex, UV, GPS, HeartRate, Thermal Cam, 21Ah 60w Charger, LEDs for days and more

Manu BenderManu Bender 06/09/2021 at 21:470 Comments

(4/23/21) Progress:  61,4%      Hardware: v9       Code: v9.7



Issues with the power Path/Charging:

USB-C input needs 9v from wall charger to work, because i am using non-balanced 2S, 8.4v, 2A charging modules that don't boost the voltage.

i tested multiple 2S charging boards TP5100 in parallel and i think it killed 2 of them. So charging would be limited to 1 charger with 2A max, which would take way too long (over 16h). Maybe going 2S was a bad idea, but it gives me the ability to toggle these (HW-313, 3A) voltage buck converters on and off via their enable pins. And voltage conversion differences between battery voltage and the component voltages are lower. (highest is 12v, lowest 3.3v)

Having a balanced, protected 2S (3 terminal) buck-boost converter/charger supporting 7A with USB-C PD4.0 polling for voltage, input and output switch, would be a dream (MJ1 Batteries support 6.8A charge rate, which would take 6h30).. if my math is correct.

I know designing a custom PCS with charging/power/protection/management features, sensors and as much as fits on it would probably be the best solution, but i don't have the expertise yet. Arduino and Alibaba modules it is for now. 

unless someone wants to help?

New Component / Feature Illustration: