stuartornum
New member
- Joined
- Aug 2, 2017
- Messages
- 3
Hi All,
I'm doing a project to run my Raspberry PI Zero W entirely "off-grid", currently I have:
I managed to run the RPi for 11 hours on a single 18650 (~80% charged), which I was very happy with.
The issue was, that18650 cell died, the voltage wentdown to 1V and will no longer take a charge - I'm assuming the 3V/5V DC-DC converter continued to draw current even when the RPi had shutdown due to low voltage (the RPi has low voltage protection built in)
So my question is, I think I need some form of battery protection that will shut off an current when voltage drops below N (ideally 3.1/3.2V) - I've seen IC protection for individual cells, however, I'd like this to work when I have a 20x 18650 batteryand take the voltage of thebattery instead ofindividual cells.
Any thoughts would be greatly appreciated!
Cheers
I'm doing a project to run my Raspberry PI Zero W entirely "off-grid", currently I have:
- 4.5W @ 5V solar panel
- TP4056 to manage charging
- Planning on running 20x 18650s (1800mah ->2000mah tested capacity), currently running 1x 18650 for proof-of-concept
- 3V to 5V DC-DC converter:https://www.ebay.co.uk/itm/253098313416
- Raspberry Pi Zero W
I managed to run the RPi for 11 hours on a single 18650 (~80% charged), which I was very happy with.
The issue was, that18650 cell died, the voltage wentdown to 1V and will no longer take a charge - I'm assuming the 3V/5V DC-DC converter continued to draw current even when the RPi had shutdown due to low voltage (the RPi has low voltage protection built in)
So my question is, I think I need some form of battery protection that will shut off an current when voltage drops below N (ideally 3.1/3.2V) - I've seen IC protection for individual cells, however, I'd like this to work when I have a 20x 18650 batteryand take the voltage of thebattery instead ofindividual cells.
Any thoughts would be greatly appreciated!
Cheers