Monitoring/protection/cell-balancing/authentication
The monitoring/protection/cell-balancing/authentication is responsible for protecting, monitoring, balancing and authenticating the battery pack. The data that is monitored includes individual cell voltage and pack temperature. It also implements active/passive cell balancing of each battery cell inside the battery pack. Additionally it can control the charge and discharge FET present in the battery pack.
Products
Battery protectors
BQ77905—3- to 5-series li-ion and li-phosphate ultra-low-power stackable battery protector
BQ7718—Family 2-5S Overvoltage Protector with Internal Delay Timer
BQ77207—3-series to 7-series cell Li-ion battery, internal delay timer, voltage and temperature protector
Pre-charge/charge/discharge
The pre-charge/charge/discharge is used to provide pre-charge via and protect the battery pack from abnormalities such as overvoltage, overcurrent charging/discharging, over temperature and external short-circuit. This can be implemented by using two low voltage FETs, which are controlled by the battery analog front end or the fuel gauge/ MCU.
Products
N-channel MOSFETs
CSD18534Q5A—60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 9.8 mOhm
Battery protectors
BQ77905—3- to 5-series li-ion and li-phosphate ultra-low-power stackable battery protector
BQ7718—Family 2-5S Overvoltage Protector with Internal Delay Timer
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