Electronics > Projects, Designs, and Technical Stuff
Li - Ion Smart / Battery Charger
StreetRooster:
Thank you
Maximum charge current will be 3A.
Battery Voltage 3.7V
StreetRooster:
:-+ I follow, the 3.7 V is whats printed on the battery.
KL27x:
3.7V is printed on the battery because that's the nominal output voltage under load. The charge/float voltage would be 4.2V. Daixiwen was generously allowing for the possibility that you live in an alternate universe.
AlienRelics:
Which chemistry? Most have a terminal charge voltage of 4.20V, but not all.
https://batteryuniversity.com/learn/article/types_of_lithium_ion
Way more information on Lithium Ion cell charging:
https://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
It really is a wise idea to select a chip dedicated and designed for Lithium Ion charging.
KL27x:
In an alternate universe, those other chemistries might be relevant. That info is 20 years old* when those cells still showed (or at least more recently had shown) potential. One of those...(LiFeO4 ? Something like that) is still alive and used in some applications like EV's. But if the cells are marked 3.7V, you know exactly what it is. It's the one that is 99.9% of the li ion battery industry.
*I not only read about these chemistries nearly 20 years ago, I read it from this exact site. This site has not changed much in the interim.
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