How can I control the current that is supplied to a battery? I need to balance current consumption to avoid some parts of the system run out of power.
My system is described in the attached file. I have a 12V input which goes into a Boost regulator to get 48V. Those 48V are used to feed a battery and the rest of electronic as well. I need to limit the current injected to the baterry depending on the power consumption of the rest of the system (which I am monitoring), in order to avoid that battery charge takes all the power and the rest of the electronic doesn't work properly.
The battery is a complete commercial solution. I mean it has its own charge controller, protection, etc.
I have thought about a power mosfet working as a switch and controlling it by a PWM signal, but I don't know if it's a good practise or not, since I am not experienced in woking with batteries.
Another possible solution I was thinking about is the one you can see in 03.png attached file. The approach consists of dividing the 2A maximum current in several 250 mA limited branches, controlled by a mosfet switch. In this case, the current would be controlled in 250 mA "jumps", but it could be a solution. The problem here is the PCB area required for this and the heat the resistors will generate.
I appreciate any help on this issue, since I'm a bit lost right now. I'm sure there should be any other workaround to get my aim, but I don't know what.
Regards and thanks in advance
Jesús O.
My system is described in the attached file. I have a 12V input which goes into a Boost regulator to get 48V. Those 48V are used to feed a battery and the rest of electronic as well. I need to limit the current injected to the baterry depending on the power consumption of the rest of the system (which I am monitoring), in order to avoid that battery charge takes all the power and the rest of the electronic doesn't work properly.
The battery is a complete commercial solution. I mean it has its own charge controller, protection, etc.
I have thought about a power mosfet working as a switch and controlling it by a PWM signal, but I don't know if it's a good practise or not, since I am not experienced in woking with batteries.
Another possible solution I was thinking about is the one you can see in 03.png attached file. The approach consists of dividing the 2A maximum current in several 250 mA limited branches, controlled by a mosfet switch. In this case, the current would be controlled in 250 mA "jumps", but it could be a solution. The problem here is the PCB area required for this and the heat the resistors will generate.
I appreciate any help on this issue, since I'm a bit lost right now. I'm sure there should be any other workaround to get my aim, but I don't know what.
Regards and thanks in advance
Jesús O.