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Constant Current Constant Voltage (CCCV) Charging - FVEAA Lithium batteries are charged using a CCCV (or CC CV) charging profile The picture below illustrates a CCCV charging cycle for a single lithium-ion cell The example is for a small cell (think smartphone), but the concept is the same for the large format cells we use in our EVs
Why does current decrease in CC mode before reaching 4. 2V in CCCV . . . Now here is where the problem begins: Unlike the graphs of CCCV explanations and demonstrations on the internet where current stays the same until 4 2 V and starts decreasing in CV mode, in my setup current starts to decrease long before 4 2 V, generally around 3 9 to 4 V
Calculating battery current during charging in CCCV EDIT 3: For posterity, here are two helpful lectures on how CCCV may be simulated by describing a circuit as a system of differential equations and converting them to a discrete time model that can be simulated easily:
CC CV mode of Buck Converter used for Battery Charging I was trying to understand the CV CC charging of the battery using a buck converter I came across this website, where it described the addition of sensor resistors to measure current and get the r