What I am thinking of implementing:
1. I have remote monitoring circuit using gsm which senses electrical parameters like phase, power, ac supply etc. Now considering case of no ac supply available then also device should be able to send notifications. to achieve this I am thinking of running module on battery(3.7v Li-Ion).
2. As it is remote monitoring system, so battery will always be connected to supply for charging.
As per my knowledge one should avoide keeping battery connected for charging for all the time, it will reduce life of battery/overheating/overcharging are the parameters comes into the picture.
- If I do like |Wall Adapter((ac-dc smps)|-->|battery charger|-->|circuit| above mentioned parameters will participate.
- If I do like Wall Adapter and battery to use in parallel using OR ing with two diodes or using relay or using IC's like TPS2104/MAX 6326/TPS2110 etc then how can I take care of side by side battery charging?
I googled so many things to implement this but not found useful or may be I am not looking into right direction. I referred similer link 'http://forum.allaboutcircuits.com/threads/how-to-charge-a-battery-while-supplying-power-to-my-device.67530/' but no luck.
Even I looked into the data sheets and videos for li-ion charging circuits using MCP73831 or TP4056.
I am totally confused how to proceed further.
Is it a good idea to use |Wall Adapter((ac-dc smps)|-->|battery charger|-->|circuit| or
using Wall Adapter and battery in parallel and side by side charging battery. or to use wall adapter when supply is available and side by side charge battery so that I can use battery when power will be absent.
I know UPS works same way like it powers directly from supply all the time and charging battery side by side. At the time supply is interrupted it switched to the battery.
I am looking for simple solution, and I think this is a right forum I am looking for a solution. Thanks in advance...