BQ77PL900DL Datasheet/PDFThe BQ77PL900DL is an advanced power management IC (PMIC) and battery management system dedicated to building a reliable and secure power supply in high-voltage battery and other energy storage systems. With its advanced features and the integration of an autonomous power management unit and an effective energy storage system, it provides the system with a reliable and secure power solution for high-voltage battery storage systems that require safe and reliable charging and discharging.
The BQ77PL900DL is designed specifically for power management in urban public transportation modes such as electric buses, electric trolleys, and electric light rail vehicles; in battery electric vehicle (BEV) applications, electric scooters, and various other energy storage applications. It works in combination with a battery management system to collect data from multiple battery packs so that the system can be precisely monitored and controlled for a secure operation. The device includes an array of dedicated digital and analog circuitry for monitoring and diagnostics, voltage and temperature sensing, and energy storage management, making it an ideal solution for ensuring a safe charging and discharging process in high-voltage battery systems.
Working Principle
The BQ77PL900DL works to monitor, analyze, and control the system’s power flow and energy storage in order to guarantee a safe and secure charging and discharging process. To achieve this, it integrates several advanced power management technologies, including a powerful MCU, a high-accuracy voltage sensing circuit, and an array of analog and digital circuits, together with a proprietary battery management system. Through the aid of these advanced technologies, the IC is able to monitor, analyze, and control the system’s power and energy storage system, with superior accuracy and reliability.
The primary function of the BQ77PL900DL is to check the voltage levels of each cell in the battery pack, enabling it to determine whether a cell is overcharged or over-discharged, and controlling the discharge or charging rate of the cells in the battery pack accordingly. Additionally, the device is able to monitor the temperature of each cell in the battery pack and provide adequate thermal protection against possible over-heating. Furthermore, the device also is able to monitor the amount of energy stored in the battery pack and turns off the discharge or charging process when it reaches a desired amount. Thus, enabling the system to reach a higher efficiency level and a longer battery life.
In order to ensure safe and reliable operation, the BQ77PL900DL is designed to include an array of integrated safety and diagnostic functions. These functions are designed to ensure that the system is working properly and is not failing. The integrated safety and diagnostic functions include overvoltage protection, low voltage protection, over-current protection, over-temperature protection, undervoltage protection, and overtemperature protection. These functions will shut down the device if any of them is detected and protect the system from damaging itself.
Conclusion
The BQ77PL900DL is a PMIC and battery management system specifically designed for applications in urban public transportation modes, electric vehicles, and various other energy storage systems. The device integrates a high-performance MCU, an array of analog and digital circuits, and a proprietary battery management system that enables it to monitor, analyze, and control the power and energy storage system with superior accuracy and reliability. Additionally, the device also includes various safety and diagnostic functions to ensure a safe and reliable operation of the system.