Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow the guidelines in the TI application note 'Battery Management System (BMS) PCB Layout Guidelines' (SLUA623) for optimal performance and to minimize noise and EMI.
Calibration of the BQ294502DRVT involves setting the gain and offset values for the voltage and current measurements. TI provides a calibration procedure in the datasheet, which involves measuring the voltage and current at different SOC levels and calculating the gain and offset values using the provided equations.
The BQ294502DRVT is designed to support up to 16 series-connected cells, but the maximum number of cells that can be connected in series depends on the specific application and the voltage rating of the cells. It's recommended to consult with TI support or a battery management expert to determine the maximum number of cells that can be safely connected in series for a specific application.
The BQ294502DRVT has built-in cell balancing functionality, which involves actively balancing the cells by dissipating excess energy from the higher-voltage cells to the lower-voltage cells. The balancing currents are programmable and can be set up to 50 mA per cell, depending on the specific application requirements.
The BQ294502DRVT uses a proprietary communication protocol, but it's compatible with the I2C interface. TI provides a software development kit (SDK) and example code to help interface with the device using a microcontroller or other host processor.
BQ294502DRVT datasheet
by Texas Instruments
