Battery charging control method and device and charging system and portable device.

Abstract

The invention discloses a charging control method for adjusting a charging current of a charging device, including monitoring a working voltage of the charging device, wherein the working voltage includes a voltage difference between a charging voltage and a battery voltage; adjusting the charging current of the charging device dynamically according to the working voltage of the charging device to maintain a working power of the charging device within a predetermined power range.The charging control device comprises a voltage detection module and a current adjusting module. The charging system comprises a charging device and the charging control device.

Description

technical field [0001] The present invention relates to charging technology, and more specifically relates to a charging control method and device, a charging system and a portable device. Background technique [0002] Portable electronic devices, such as mobile phones, have been widely used in people's daily life. These devices usually use rechargeable batteries as power sources. Due to the limited volume of portable electronic devices and the limited capacity of batteries, the batteries need to be charged frequently. [0003] At present, a constant current method is usually used in mobile phones to charge batteries. During battery charging, a charging device in the mobile phone always charges the battery with a constant current. In this constant current charging mode, in order to avoid overheating and damage to the charging device, the working power of the charging device cannot exceed the rated power of the charging device. Since the battery voltage changes during the cha...

AI Technical Summary

Problems solved by technology

In this constant current charging mode, in order to avoid overheating and damage to the charging device, the working power of the charging device cannot exceed the rated power of the charging device. Since the battery voltage changes during the charging process, the working power of the charging device also changes during the entire charging period. When the charging voltage, that is, the voltage applied by the charger device to the charging device remains unchanged, as the battery voltage increases, the working power of the charging device will gradually decrease, and the charging efficiency of the charging device will decrease, resulting in a longer charging time. When the charging voltage is unstable, the greater the charging voltage, the greater the working power of the charging device will be. When the charging voltage exceeds a certain value, the working power of the charging device will be greater than its rated power, which will easily cause damage to the charging device.

[0004] To sum up, when the existing constant current charging method is used to charge the battery, the working power of the charging device varies greatly with the charging voltage or battery voltage. If the working power is too low, the charging efficiency of the battery will decrease, and the charging time will be longer. High, it will cause the charging device to overheat and damage

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