DALY BMS details smart control strategies for battery management systems

DALY BMS, a manufacturer of battery management systems (BMS), has published technical details regarding its latest control strategies. The company aims to clarify the operational functions of its BMS units, which are critical for the safety and performance of lithium-ion battery packs.

The release details the various wake-up methods for the BMS units, distinguishing between initial activation and subsequent power-on sequences. Initial activation involves three methods (button, charging, Bluetooth button), while later operations offer six methods, including those utilizing communication protocols (485, CAN) and discharge current.

DALY BMS's system incorporates an optimized sleep mode, entering low-power state when no activity is detected for a set duration. During this mode, charging and discharging are monitored, and the system responds immediately to detected disturbances or commands. Furthermore, the publication describes the state of charge (SOC) calibration strategy, which relies on achieving an overvoltage condition during charging. Fault handling is categorized into two levels: minor faults trigger alarms, while severe faults result in the disconnection of the power switch.

Cell balancing within the battery pack is managed passively through resistors during charging when the voltage difference between cells exceeds a defined threshold. The system's power consumption is optimized, remaining below 500µA at the hardware level and under 35mA for the software during operation. These strategies are designed to enhance battery longevity and reliability across various electric vehicle and energy storage applications.