It depends how long the long run is.Hi, I am building and designing a power HAT for my Raspberry Pi 5, which will be installed inside a car. It will function as a satnav, ham radio programming computer, GPS tracker, and dashcam controller.
I want the Raspberry Pi to remain powered for 1-2 hours after the car engine is switched off. I've started drawing a schematic based on a 3-cell BMS IC and charger from TI. However, this approach requires some complexity in both software and design. I was wondering if perhaps I could use a single cell instead.
I bought a step-up module based on the LTC1871 IC, connected it to a 3.7V RC car battery, and then connected the module's output to the Raspberry Pi. It worked, and the Pi booted with no warnings. Is it a bad idea to run it off a single cell in the long run?
So, you said 1-2 hours. Which is it?
You said you wanted to run four functions. Are they all software functions, or will you be powering additional hardware along with the Pi?
Add up the average power consumption of the system in watts. Multiply by the number of hours you want to run for. That gives you your power consumption in watt hours (Wh). Add 25% or 50% to cover inefficiencies and to give you a bit of headroom.
Now look at the capacity of your battery in Wh and decide if it's going to work.
Statistics: Posted by ame — Thu May 30, 2024 2:04 am