1results about How to "Charge control" patented technology

The application discloses a battery protection board, a battery system and a mobile device. The battery protection board comprises a power meter chip, a current sampling circuit and a first protection circuit. The first end and the second end of the power meter chip are connected with the positive electrode and the negative electrode of a battery pack respectively. The power meter chip is used for measuring the actual voltage of the battery pack. The current sampling circuit is used for collecting the charging current of the battery pack and feeding back to the power meter chip. The first protection circuit is used for protecting the battery pack according to the actual voltage and the charging current of the battery pack. The power meter chip is used for sending the actual voltage of the battery pack and the charging current of the battery pack to a mainboard system, so that the mainboard system charges the battery pack according to the actual voltage and the charging current of the battery pack. The actual voltage of the battery pack can be measured more accurately. Since the mainboard system controls the charging current according to the difference between the actual output voltage of the charging chip and the actual voltage of the battery pack, the charging efficiency is high when the charging current is large.