Anyone know a lot about 18650 batteries?

Forums › Gadgets, robotics, home automation, electronics (including wearables) › Anyone know a lot about 18650 batteries?

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Nate001

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#2512269 25-Jun-2020 15:21

neb: And why were you posting to GZ from work?

Does it bother you that I do?

LennonNZ: Did you have fun driving the robots around?

Hopefully you didn't ram the cat (if it was there)

Its a cool project - No cats were harmed (or seen). Don't know how I feel about letting others control a robot in my house.

neb

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#2512272 25-Jun-2020 15:22

Nate001:
neb: And why were you posting to GZ from work?

Does it bother you that I do?

It obviously bothered your employer's IT department.

richms

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#2512284 25-Jun-2020 15:40

If the board you are putting it into has protection which most of those UPS hats etc do, then you want to put unprotected cells onto it. If you parallel up protected cells then weird things happen as they start to disconnect and reconnect the load when they get low and it will usually stop the device from having any warning about low battery conditions since they hold up well till the first cell disconnects then the extra load on the others makes them sag and disconnect almost immediately.

Richard rich.ms

mrdrifter

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#2512612 26-Jun-2020 09:08

If you're willing to wait a few weeks SeedStudio has a new one coming out in July - https://www.seeedstudio.com/UPS-With-RTC-Coulometer-For-Raspberry-Pi-4B-3B-3B-p-4639.html

LennonNZ

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#2512718 26-Jun-2020 11:02

There seems to be quite a few of the small UPS units out there with various batteries such as

https://www.jaycar.co.nz/power-pack-for-raspberry-pi-with-li-ion-battery/p/XC9060

https://nicegear.nz/product/ups-pico-uninterruptible-power-supply-hat-for-raspberry-pi

Yes I could find the correct components and run a 4S BMS with Step UP/Down DCDC convertors and do it all myself.

At the moment I'll just wait on the Aliexpress one and leave it running on the Powerbank I have it hooked to at the moment.

If all fails I can get a RAVpower battery bank with Passthru Charging..

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