I have a question I just asked myself a few minutes ago:
Am I able to charge a battery cell made out of 6 rechargeable batteries with a micro usb charger?
the batteries are 3.7 volts and 3Ah
so the pack is 11.1 volts an 6Ah.
and I have bought a charger board which can charge at 1A and 5 volts.
am I able to charge with this board safely?
and will my batteries charge to their max?
and if my math is right it will take about 15 hours to charge?
To charge a battery the charge voltage must be greater than the battery voltage. If you are asking if you can charge an 11.1v battery with a power supply that produces 5v the answer is NO.
Post a link to the datasheet for your "charger board"
...R
You need a charger designed for that pack. It should be a balancing charger, which checks the voltage of each cell.
Use the right charger for lithium packs or risk fire. That always means a balancing charger for
more than one in series.
datasheet
May I quote from the first line of the datasheet
The TP4056 is a complete constant-current/constant-voltage linear charger for single cell
lithium-ion batteries
How do you think it would be suitable for a multi-cell battery?
...R
well It worked with a cell a friend of mine made from 3 cells
but the voltage was 3.6 volts and he used his 3 batteries in parallel.
I just want a 12 v charger for the batteries I want to be using.
The batteries are Li-ion 3,6 volts 3Ah cells.
and the battery I made with them is a 11.1 volts 6Ah battery.
I want to charge the battery from inside a project so I don't want to unplug the batteries every time I need to charge them.
and I want to be able to give of power from the same board, if that isn't possible I will try to find a separate board for that.
It will be nice if the charger is a protection circuit at the same time.
is there any way I can get what I want?
I just want a 12 v charger for the batteries I want to be using.
Unfortunately, lithium-based batteries have to be treated with great care, and for your setup, a balanced charger is REQUIRED. It is also required that you do not over-discharge your cells, or they will be immediately destroyed.
If you want a simpler system, use a battery pack of NiMH cells or even lead-acid. They are much easier to charge and much more tolerant of abuse.
Charging one or two cell packs is reasonably doable, but those solutions aren't available for three or more cell packs. So not only is the forum being stubborn in not providing an answer but a simple answer just doesn't exist. You just can't beat the ease or security of buying an appropriate multi-cell charger.
Battery protection circuits for ~1-6 cells are pretty inexpensive; google should find them for you easily enough if you still want to go that route. Assuming you do buy a proper charger the BPC will still protect you from overcurrent or overdischarge.
I do have a 12 v ac adapter with a constant current of 12v and 0.5A.
I guess I could use this charger instead of a whole charging board.
still I will need one for safe charging and protection of the batteries.
Maarten2900:
well It worked with a cell a friend of mine made from 3 cells
but the voltage was 3.6 volts and he used his 3 batteries in parallel.
There is a huge difference between batteries connected in parallel and batteries connected in series.
You need to take time out and study some of the basics of electricity.
Until you have done that just play safe and buy a charger designed for you sort of batteries.
...R
Is it reasonable if I buy a external charger and charge the batteries separated from each other and use them in the pack?
something like this:
http://www.gearbest.com/batteries-chargers/pp_21079.html?wid=21
I still do need a protection circuit right?
but I can't seem to find one...
at least one for the setup I'm using.
as chagrin said they should be inexpensive but I'm not finding them.
Robin I know how electronics work and I know there is a huge difference.
But i'm just asking if my setup is going to work.
because there is a difference I asked.
And I know there are people who know more about batteries than I do.
so I asked.
Maarten2900:
Robin I know how electronics work and I know there is a huge difference.
But i'm just asking if my setup is going to work.
because there is a difference I asked.
I don't mean to be unkind but the questions you have asked suggest to me that you are not as knowledgeable as you may think.
And I am concerned that your lack of knowledge will result in something that causes a fire and property damage or even personal injury.
...R
thanks.
I just want help of people who are better than me at electronics to make sure I'll be safe.
That's why I asked.
I have another idea:
If I get a charger which charges at for example 1A and 12V and can charge 3 cells I should be fine right?
because I have made two packs of 3 cells and put the two packs in parallel.
it will only take 6 hours to charge up completely because the battery is 6Ah at 11.1V.
will this work?
Maarten