Dear Team,
I don't know about arduino much, I am not a electrical and electronics engineer either. I want to run a project where I need to use 3 mobile batteries at one time, the reason being that arduino will use 1 at a time and on the other side a tiny charging module will keep charging the remaining 2 batteries. This is how it should work. The project challenges power and cannot be connected to power and also cannot be made down as the arduino will be in air !!!
I have a small circuit which will keep charging, but I am afraid how to do battery charging 1 by 1 and switching power of arduino 1 by 1 to the maximum battery storage at the same time.
Once I get ideas from you, I will proceed to make such a circuit.
Kind Regards.
Exactly what type of "mobile battery" are you talking about?
Steve
Hello slipstick
For example this one or similar to this
Samsung EB-BG530CBN 2600mAh 3.8V Li-ion Battery 9.88Wh
Full Capacity battery
Long Life Battery
Hello Slipstick,
Actually battery capacity, amps and all I don't understand, you can take any mobile battery which is flat type and compact so that I can accomodate 3 that is the reason I have chosen this, if you have any other compact and long lasting batteries suggestion, also the ones which makes your circuit easy and performing you can put is here for better results.
Kind Regards.
Where does the charging power come from? Solar?
It is usually best to charge the battery while you are using it.
Li batteries need special care when charging and require a properly designed charger. Rather then doing a big copy and paste go to the Battery University web site at: https://batteryuniversity.com/search/search&keywords=battery+capacity/ This will give you the basics you are missing and better help you size a battery. Remember if you charge the battery while using it you need to size the charger appropriately. This response is to help you get started in solving your problem, not solve it for you.
Good Luck & Have Fun!
Gil
Hello Team,
Yes I am planning to charge through solar. But the thing is that I do not want to charge and utilize battery at the same time, I just want arduino to monitor 3 batteries and switch to the one which is full when the current battery utilization is over and the charging will switch to remaining 2 batteries which needs to be charged.
I don't know if this is possible or not at all by arduino. If yes, how is it possible. If you could share the circuitry, nothing like it.
Thanks for your time once again Team.
Hello Team,
There is one thing which I would like to highlight here, Is it possible to store the solar received charge in some other electrical component and that will start charging the battery when the switch happen ?
Just my few cents on this.
So the Arduino is powered only by the batteries which it is switching?
If you are building a battery charger and the user can un-snap all the batteries and take them out and use them, then the charger needs to be built to accommodate that.
If the batteries are part of the unit and intended to run the Arduino at night and on cloudy days then switching is a bad idea.
When you switch from a nearly-flat battery to a freshly-charged one, you cannot let those two batteries be connected together, even for a millisecond. The fresh battery will try to charge the flat one and you get very high current between the two batteries.
If you operate your switches so there is a gap and two batteries are never connected like that then what is powering your controller Arduino during the gap?
There is also an efficiency problem. Batteries deliver the most energy when you are drawing that energy out slowly. Watch batteries are tiny but they last for years. The most efficient way to use 3 batteries is not one at a time. If they're all in parallel then the current from each battery is one third of the total. You will get a lot more duration out of your batteries to cover cloudy days that way.
Hi Morgan,
Thank you for your time and innovative ideas.
I think things are getting more and more complicated here. Well to simplify the things, actually my device is small which will occupy just 3 batteries and arduino nano, Let us put it this way to make it more simplified version, Is it possible like below:-
The arduino will be in air with 3 batteries in parallel as you specify and a nano along with solar charger, when batteries are about to end and arduino is in air, the arduino will come down to ground, maybe hibernate / disconnect and keep charging all batteries and again go in air after solar charging.