Charging method, charging device and terminal

1. A charging method, comprising:

when detecting that a battery is charged with a trickle current, acquiring a voltage of the battery;

determining a preset voltage range to which the voltage belongs;

acquiring a charging current corresponding to the preset voltage range;

charging the battery according to the charging current,

wherein the method further comprises:

when starting to charge the battery with the trickle current, acquiring a first voltage of the battery, and acquiring a charging duration corresponding to the first voltage, wherein the charging duration ranges between charging the battery with the first voltage to charging the battery with a preset voltage threshold, and the preset voltage threshold is a termination voltage of the trickle current charge phase;

when detecting that a charging period of the battery reaches the charging duration, acquiring a second voltage of the battery;

when judging that the second voltage is less than the preset voltage threshold, computing a difference between the second voltage and the preset voltage threshold;

when judging that the difference is less than or equal to a preset difference threshold, determining a target voltage range from the preset voltage ranges; and

acquiring a target charging current corresponding to the target voltage range, and charging the battery according to the target charging current.

2. The charging method according to claim 1 , before detecting that a battery is charged with a trickle current, further comprising:

acquiring voltage samples during a trickle current charge phase that the battery is charged with the trickle current, and generating a plurality of voltage ranges by sequencing the voltage samples from low to high;

determining the plurality of voltage ranges as a plurality of preset voltage ranges; and

setting a plurality of charging currents for the plurality of voltage ranges, wherein the higher a preset voltage range is, the higher a corresponding charging current is.

3. The charging method according claim 1 , wherein determining a target voltage range from the preset voltage ranges comprises:

determining a preset voltage range that is larger than a preset voltage range to which the second voltage belongs as the target voltage range.

4. The charging method according claim 1 , after computing a difference between the second voltage and the preset voltage threshold, further comprising:

when judging that the difference is larger than the preset difference threshold, acquiring a discharging current; and

when judging that the discharging current exceeds a preset discharging current threshold, generating a prompt message, wherein the prompt message is configured to prompt a user to stop using a terminal so as to improve a charging speed.

5. The charging method according to claim 4 , wherein after generating a prompt message, further comprising:

controlling the terminal to enter a preset low-power-consumption mode.

6. The charging method according to claim 4 , further comprising:

when judging that the discharging current does not exceed the preset discharging current threshold, improving the charging current.

7. The charging method according to claim 1 , wherein the charging current corresponding to the preset voltage range is a constant, or a variable that changes linearly during the preset voltage range.

8. The charging method according to claim 1 , wherein a corresponding between charging currents and preset voltage ranges is preset.

9. The charging method according to claim 1 , wherein a corresponding between first voltages and charging durations is preset.

10. A terminal, comprising: a memory, a processor and computer programs stored in the memory and executable by the processor, wherein the processor is configured to execute the computer programs to achieve a charging method, and the charging method comprises:

when detecting that a battery is charged with a trickle current, acquiring a voltage of the battery;

determining a preset voltage range to which the voltage belongs;

acquiring a charging current corresponding to the preset voltage range; and

charging the battery according to the charging current,

wherein the method further comprises:

when starting to charge the battery with the trickle current, acquiring a first voltage of the battery, and acquiring a charging duration corresponding to the first voltage, wherein the charging duration ranges between charging the battery with the first voltage to charging the battery with a preset voltage threshold, and the preset voltage threshold is a termination voltage of the trickle current charge phase;

when detecting that a charging period of the battery reaches the charging duration, acquiring a second voltage of the battery;

when judging that the second voltage is less than the preset voltage threshold, computing a difference between the second voltage and the preset voltage threshold;

when judging that the difference is less than or equal to a preset difference threshold, determining a target voltage range from the preset voltage ranges; and

acquiring a target charging current corresponding to the target voltage range, and charging the battery according to the target charging current.

11. The terminal according to claim 10 , wherein the charging method further comprises:

before detecting that a battery is charged with a trickle current, acquiring voltage samples during a trickle current charge phase that the battery is charged with the trickle current, and generating a plurality of voltage ranges by sequencing the voltage samples from low to high;

determining the plurality of voltage ranges as a plurality of preset voltage ranges; and

setting a plurality of charging currents for the plurality of voltage ranges, wherein the higher a preset voltage range is, the higher a corresponding charging current is.

12. The terminal according to claim 10 , wherein determining a target voltage range from the preset voltage ranges comprises:

determining a preset voltage range that is larger than a preset voltage range to which the second voltage belongs as the target voltage range.

13. The terminal according to claim 10 , wherein the method further comprises:

after computing a difference between the second voltage and the preset voltage threshold, when judging that the difference is larger than the preset difference threshold, acquiring a discharging current; and

when judging that the discharging current exceeds a preset discharging current threshold, generating a prompt message, wherein the prompt message is configured to prompt a user to stop using a terminal so as to improve a charging speed.

14. The terminal according to claim 13 , wherein the method further comprises:

after generating a prompt message, controlling the terminal to enter a preset low-power-consumption mode.

15. The terminal according to claim 13 , wherein the method further comprises:

when judging that the discharging current does not exceed the preset discharging current threshold, improving the charging current.

16. The terminal according to claim 10 , wherein the charging current corresponding to the preset voltage range is a constant, or a variable that changes linearly during the preset voltage range.

17. The terminal according to claim 10 , wherein a corresponding between charging currents and preset voltage ranges is preset; and a corresponding between first voltages and charging durations is preset.

18. A non-transitory computer-readable storage medium having stored therein instructions that, when executed by a processor of a mobile terminal, causes the mobile terminal to perform a charging method, the charging method comprising:

when detecting that a battery is charged with a trickle current, acquiring a voltage of the battery;

determining a preset voltage range to which the voltage belongs;

acquiring a charging current corresponding to the preset voltage range; and

charging the battery according to the charging current,

wherein the method further comprises:

when starting to charge the battery with the trickle current, acquiring a first voltage of the battery, and acquiring a charging duration corresponding to the first voltage, wherein the charging duration ranges between charging the battery with the first voltage to charging the battery with a preset voltage threshold, and the preset voltage threshold is a termination voltage of the trickle current charge phase;

when detecting that a charging period of the battery reaches the charging duration, acquiring a second voltage of the battery;

when judging that the second voltage is less than the preset voltage threshold, computing a difference between the second voltage and the preset voltage threshold;

when judging that the difference is less than or equal to a preset difference threshold, determining a target voltage range from the preset voltage ranges; and

acquiring a target charging current corresponding to the target voltage range, and charging the battery according to the target charging current.