"Each parallel string of cells in a lithium-ion pack needs independent voltage monitoring. In addition, each cell in series must be monitored for voltage." so how about the voltage monitoring circuit?
The MCP73812 (TI) is an Li-Ion charger IC for one cell (max charge voltage 4.2V). It's programmable for individual charging currents and has no indication about the charge state of the connected battery.
This circuit is modified to indicate charging and termination of charging.
Board size is 0.76X0.85inches (all SMD, except for connectors)
P.S. The vias around the IC are thermal holes.
A protection circuit is totally different than a charge control IC. The protect circuits monitor current and open a series FET to disconnect the battery in case of a short on the pack. It also has voltage monitoring to open the FET if the cell voltage gets too low or too high.li ion protection circuit
No, the protection IC goes inside the battery pack and monitors both cell voltages and the total pack current. Motorola makes the protection IC used by Sony in their battery packs and I think you could look at it and see the functions it does.so, actually , i've to use the available protection circuit for individu battery. and to design the control circuit for complete battery packs, is it?