Texas Instruments (TI) today introduced a new automotive battery monitor and balancer that can accurately report voltage measurements in systems up to 800 V. In addition, BQ79616-Q1 simplifies the compliance procedures for the safety integrity level ASIL D of hybrid electric vehicles (HEV) and electric vehicles (EV).
The main design challenge faced by car manufacturers is how to filter system-level noise to accurately measure battery voltage and temperature, and accurately report this information to the microcontroller (MCU). BQ79616-Q1 can meet these two challenges, help engineers achieve the goal of battery safety, and to a greater extent in the wired and wireless battery management system to increase the car mileage after each charge.
The BQ79616-Q1 battery monitor and balancer is the industry's first device with a patented fault wake-up function. When used in conjunction with the BQ79600-Q1 SPI/UART communication interface, it can completely shut down the system when the vehicle is parked or stalled. This helps design engineers save battery power, improve battery balancing performance and meet safety requirements. For more information about TI's wake-up function, please read the technical article:"Save HEV/EV battery power through automatic host reverse wakeup".
useHigh precision battery monitor and balancermoreSignificantly increase the mileage
BQ79616-Q1 is the first product in TI’s new-generation battery monitor and balancer product series, which can support lithium iron phosphate (LiFePO)4) High-precision monitoring of batteries including various chemical substances. This enables automakers to more accurately measure the state of charge and health of the battery, thereby reducing costs. The BQ79616-Q1's integrated digital low-pass filter and high-precision analog-to-digital converter can optimize the signal measurement accuracy and achieve battery voltage measurement with an error of less than 2 mV.
byTIThe fastest diagnostic procedure simplifiedASIL DCertification
TI’s new monitors and balancers meet the component-level requirements of ISO 26262 and support voltage measurement, temperature measurement and communication that meet ASIL D compliance requirements, thereby greatly saving bill of materials (BOM) and software overhead. BQ79616-Q1 has TI's fastest battery fault diagnosis time (100ms in a 400V system), which can achieve higher system reliability and battery safety.
Improve system reliability through robust communication and advanced thermal management functions
BQ79616-Q1 has strong electromagnetic compatibility (EMC), can withstand the harsh and noisy environment faced by hybrid and electric vehicles, without affecting the reliability of daisy chain communication. In addition, the pin rating of the device enables it to withstand high-voltage transients and hot-swap operations, and it integrates automatic battery balancing to simplify thermal management. For more information on improving system reliability through advanced thermal management, please read the technical article:"Improve the thermal management of electric vehicles through autonomous battery balancing".
Adjust battery design to reduce costs and shorten time to market
TI's new monitor and balancer series provide multiple channel options in the same package, pin-to-pin compatibility, and 100% reuse of existing software. In addition, the BQ79616-Q1 integrates a bus measurement function, enabling engineers to make the most of the channels in the combination of battery modules of various sizes. By combining BQ79616-Q1 with BQ79600-Q1, engineers can design a battery management system with only one communication interface in a closed-loop configuration to further reduce the number of components.