Battery pack with only protection

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, overtemperature 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

P-channel MOSFETs

CSD22205L—-8V, P channel NexFET™ power MOSFET, single LGA 1.2 mm x 1.2 mm, 9.9 mOhm, gate ESD protection

N-channel MOSFETs

CSD18534Q5A—60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 9.8 mOhm

Battery protectors

BQ77216—Voltage and temperature protection for 3-s to 16-s cell Li-ion batteries with internal delay timer

BQ2962—Overvoltage Protection for 2-Series, 3-Series, and 4-Series Cell Li-Ion

BQ7718—Family 2-5S Overvoltage Protector with Internal Delay Timer

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

BQ77216—Voltage and temperature protection for 3-s to 16-s cell Li-ion batteries with internal delay timer

BQ2962—Overvoltage Protection for 2-Series, 3-Series, and 4-Series Cell Li-Ion

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

Battery authentication ICs

BQ2026—1.5K-Bit Serial EPROM with SDQ Interface