Hello,
I have just purchased a Battery Babysitter which I plan to use with a 3.7v battery.
One thing that has been very unclear to me is if the Battery Babysitter would cut power to my project once the battery is at 3v or do I have to do that myself using an arduino or something?
Same if the battery is fully charged, will it stop charging automatically? If so, do I have to set my battery capacity and voltage ranges?
If I need to use the arduino, how could I cut the power? I need to be able to cut the power when it’s too low and if I plug the charger, it starts charging and I should be able to turn on the project once there’s enough battery. Just like a smartphone works.
I tried to find information about these things online, but the documentation is very unclear to me and I haven’t found many examples on how to use it and the ones I found didn’t have anything about shutting it down and fully charging it.
Thanks in advance for the help.
You have to install the Sparkfun BQ2744 library from here: https://github.com/sparkfun/SparkFun_BQ … master.zip
Take a look at the BQ27441 Extended configuration example. You can select the lowest operating voltage in your code. In the example it is 3000mV. By the way, you can make battery charge controller circuits by yourself. Here is an example: https://www.pcbway.com/project/sharepro … c44b9.html
Hi, thanks for the response.
I saw the function that sets the minimum operating voltage, but one thing that is still not very clear to me is, when I set that and the battery reaches that voltage, is the power to my project will actually be cut off, or it’s just what helps the library calculate the reported percent so I have to take an action myself when I get the babysitter reports 0%?
Thanks!
bidrohini:
You have to install the Sparkfun BQ2744 library from here: https://github.com/sparkfun/SparkFun_BQ … master.zip
Take a look at the BQ27441 Extended configuration example. You can select the lowest operating voltage in your code. In the example it is 3000mV. By the way, you can make battery charge controller circuits by yourself. Here is an example: https://www.pcbway.com/project/sharepro … c44b9.html
Hello,
The SparkFun Battery Babysitter is an all-in-one single-cell Lithium Polymer (LiPo) battery manager. It’s half battery charger, half battery monitor, and all you’ll ever need to keep your battery-powered project running safely and extensively.
When batteries are charged they are charged up to a voltage that is determined by the battery chemistry and construction. When the battery reaches this voltage it’s considered to be full or 100%. This voltage is usually higher than the actual voltage the battery will provide when it is being used.