Design reference to charge a li-ion battery pack

We don't have any integrated charger IC solution to support 60~70V charging voltage.

HI Sir,

i am asking to on and off the charging and discharging in BMS.It will done through Mosfet ic .Please note -----External charger will connect to BMS

this on and off process is the part of BMS.Firstly it will check the measurement parameter comes from BQ ic then microcontroller takes decision whether it will on and off the MOsfet card 

so please provide me technical note that how we achieve it.

The requirement is not clear to me. It seems you ask a load switch, not charger.
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Yes Mr. Wang i want to know about load switch.

OUR SYSTEM IS LIKE AS BELOW:

BATTERY(LI-ION CELLS) Pack whose capacity will be 60 volt and 40AH so to charge and discharge  this pack we need load switch.For load switch please give me some reference of circuit .

"Firstly it will check the measurement parameter comes from BQ ic then microcontroller takes decision whether it will on and off the MOsfet card"

Are you asking the battery charger and discharger protection FET controller?

Or,

Hi Wang,

yes we want FET protector reference.

i am using BQ76PL536 reference for battery monitoring .now i want to add circuit for charging and discharging of battery pack so for it we need FET circuit to operate battery pack charging and also provide me battery pack current calculation reference.