A charging control method and system for a mobile terminal

Abstract

The invention provides a charging control method and system for a mobile terminal. The charging control method includes steps: setting a temperature sensor in the mobile terminal, and setting that the charging temperature control condition of the mobile terminal is lower than the critical temperature; detecting the temperature changing times that the temperature value sensed by the temperature sensor in a first preset time period from satisfying the charging temperature control condition to unsatisfying the charging temperature control condition, and the temperature changing times that the temperature value from unsatisfying the charging temperature control condition to satisfying the charging temperature control condition; and determining whether the temperature changing times are greater than the preset upper limit value of the temperature changing times, wherein if so, the mobile terminal prohibits charging control based on the temperature. The charging control method and system for a mobile terminal can prevent frequently setting the charging voltage and the charging current when the temperature is at the set critical temperature so as to enable control of the charging temperature to be more reasonable.

Description

technical field [0001] The present invention relates to a battery charging or discharging method, in particular to a charging control method and system for a mobile terminal. Background technique [0002] At present, mobile terminals use rechargeable batteries. When charging, mobile terminals often obtain a large current from the charger. The current passes through the charging interface to the internal related circuits of the mobile terminal and finally to the battery. This process will increase the temperature of the mobile terminal to a certain extent. Rise; especially when the user is charging and playing with the mobile terminal, the temperature rise is more obvious. When the temperature rises to a certain value, in order to prevent damage to the mobile terminal caused by charging at high temperature, including potential safety hazards such as explosion and fire, At present, various mobile terminal manufacturers have controlled high-temperature charging; for example, wh...

AI Technical Summary

Problems solved by technology

[0002] At present, mobile terminals use rechargeable batteries. When charging, mobile terminals often obtain a large current from the charger. The current passes through the charging interface to the internal related circuits of the mobile terminal and finally to the battery. This process will increase the temperature of the mobile terminal to a certain extent. Rise; especially when the user is charging and playing with the mobile terminal, the temperature rise is more obvious. When the temperature rises to a certain value, in order to prevent damage to the mobile terminal caused by charging at high temperature, including potential safety hazards such as explosion and fire, At present, various mobile terminal manufacturers have controlled high-temperature charging; for example, when the temperature rises to the first control temperature, the charging is controlled as current-limited and voltage-limited charging; but there is such a defect in the prior art: when the temperature of the mobile terminal When the value changes, the charging voltage and charging current will be set frequently, and each setting requires the CPU to work, which will introduce a certain amount of power consumption, and eventually the temperature will rise faster. Therefore, the actual observation of the existing When the temperature of the mobile terminal is at the critical value, the temperature will suddenly rise and then slowly drop, and when it drops to the critical value, it will suddenly rise again, and the above process will be repeated.

For example, if a mobile terminal is developed and requires the temperature to rise to 45 degrees, the charging voltage is limited to 4V, the charging current is limited to 600mA, and the charging voltage is 4.2V below 45 degrees, and the charging current is 1000mA. When charging, the temperature of the mobile terminal will rise. When it reaches around 45 degrees, due to various factors (such as the detection error of the temperature sensor, etc.), the temperature detected by the mobile terminal may be 45.1 degrees for a while, and 44.9 degrees for a while, which will cause the mobile terminal to frequently set the charging voltage. with the charge current, causing the temperature to rise faster

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