Part Number:BQ77PL900
Hello everyone.
I used the BQ77PL900 battery charging and protection application. The BQ77PL900 is in host mode. The application is connected to the battery card bq77pl900 integrated.
Balance orders and cell voltage monitoring is done via the charger. But there are some deficits in the system. The most important of these is that when the balance order is issued, the BQ77PL900 continues to balance when the battery is removed from the charger. Because there is no processor on the Bms card. Only BQ series integrals are available. In order to avoid this situation, I think it is necessary to add a function such as time-out or Blank Off when I2C buffer is empty while running BQ77PL900 integrated in host mode.
I will summarize the subject;
BQ77PL900 in host mode --> Read Cell Voltage --> Cell 1 is largest(example) --> Send Cell 1 balance order through line I2C --> If the battery is removed before Balance is off at this time, balance continues.
To prevent the above situation; The BQ77PL900 integrates a time-out feature for the balance status when operating in Host mode.
Thank you for reply.
