What is the voltage graph from the point of view of the charger while performing a CC/CV charging?
Isn't a "Dedicated Lithium Ion CC/CV charger" simply "a Constant Voltage DC Source with Current Limit" (like we use in labs)?
Looking closely to the CC/CV transition of the graph, there is a sharp turn in the battery current¹. If the internal resistance of the battery is not changing that sharp - which I think it's not the case -, this is a good indication of a sharp voltage change on the output of charger. It might be quite possible that the charger exceeds the CV value right before the CC/CV transition point to keep the current constant, and then, lower the output to preserve the required CV level.
Is there any point in the charging process that the output of the power source exceeds the CV limit in CC stage?
Regarding the answers, IMHO, the "CC/CV" declaration for the battery charging process is quite misleading by definition.
"Constant Current" term leaves the terminal voltages undefined by definition. However, according to the answers, it is defined and can not be greater than CV limit at any point during the charging process.
IMO, it would be clearer if it was defined as "CV+CL (current limit)" for the charging stage.
¹: It was because of the two capacitors in the equivalent circuit model.