Method, apparatus, and device for charging a battery and storage medium

1. A method for charging a battery, comprising:

acquiring a battery temperature of the battery;

determining a charging current value I n for the n th charging stage of the battery, according to the acquired battery temperature and a preset mapping relationship between different temperature ranges and charging current values I, wherein 1<n≤N, N is the total number of charging stages, and a preset charging cut-off voltage value V n for the n th charging stage is greater than V n−1 , wherein the mapping relationship comprises a correspondence relationship among charging cut-off voltage values, temperature ranges and charging current values;

charging the battery with I j in the j th charging stage, wherein 1≤j≤N;

acquiring a voltage value of the battery at the current time;

if the voltage value at the current time is less than V j , continuing to charge the battery with I j ;

if the voltage value at the current time is not less than V j and j<N, charging the battery with I j+1 ;

if the voltage value at the current time is not less than V j and j=N, stopping charging the battery;

wherein charging the battery with I j comprises:

acquiring a voltage value before charging the battery;

determining a charging cut-off voltage value in the charging cut-off voltage values that is greater than the voltage value before charging the battery and has a smallest difference from the voltage value before charging the battery;

determining a charging cut-off current value corresponding to the determined charging cut-off voltage value as I j ; and

charging the battery with I j .

2. The method of claim 1 , wherein before determining a charging current value I n for the n th charging stage of the battery, the method further comprises:

setting the mapping relationship between the different temperature ranges and the charging current values I.

3. The method of claim 2 , wherein setting the mapping relationship between the different temperature ranges and the charging current values I comprises:

setting charging cut-off voltage values V;

dividing the V into charging cut-off voltage intervals, wherein a minimum voltage value for the n th interval of the charging cut-off voltages is V n−1 , and a maximum voltage value for the n th interval is V n , and a minimum voltage value for the 1 st interval is a preset lower limit voltage value;

determining charging current values for the n th charging stage for the different temperature ranges, according to the n th interval and the different temperature ranges;

establishing a mapping relationship between the different temperature ranges and the charging current values for the n th charging stage for the different temperature ranges.

4. The method of claim 1 , wherein determining a charging current value I n for the n th charging stage of the battery, according to the acquired battery temperature and a preset mapping relationship between different temperature ranges and charging current values I comprises:

determining a temperature range in which the battery temperature is located;

determining a charging current value for the n th charging stage for the temperature range in which the battery temperature is located as the I n , according to the mapping relationship.

5. The method of claim 1 , wherein I n <I n−1 .

6. The method of claim 1 , wherein charging the battery with I j+1 comprises:

charging the battery with I j+1 after controlling I j to change to I j+1 at a predetermined rate.

7. The method of claim 1 , wherein the battery comprises a nickel cobalt manganese power storage unit.

8. An apparatus for charging a battery, comprising:

a processor;

a memory for storing processor-executable program codes; and

wherein the processor is configured to:

acquire a battery temperature of the battery;

determine a charging current value I n for the n th charging stage of the battery, according to the acquired battery temperature and a preset mapping relationship between different temperature ranges and charging current values I, wherein 1<n≤N, N is the total number of charging stages, and a preset charging cut-off voltage value V n for the n th charging stage is greater than V n−1 , wherein the mapping relationship comprises a correspondence relationship among charging cut-off voltage values, temperature ranges and charging current values;

charge the battery with I j in the j th charging stage, wherein 1≤j≤N;

acquire a voltage value of the battery at the current time;

if the voltage value at the current time is less than V j , continue to charge the battery with I j ;

if the voltage value at the current time is not less than V j and j<N, charge the battery with I j+1 ;

if the voltage value at the current time is not less than V j and j=N, stop charging the battery;

wherein the processor is further configured to:

acquire a voltage value before charging the battery;

determine a charging cut-off voltage value in the charging cut-off voltage values that is greater than the voltage value before charging the battery and has a smallest difference from the voltage value before charging the battery;

determine a charging cut-off current value corresponding to the determined charging cut-off voltage value as I j ; and

charge the battery with I j .

9. The apparatus of claim 8 , wherein the processor is further configured to:

set the mapping relationship between the different temperature ranges and the charging current values I.

10. The apparatus of claim 9 , wherein the processor is further configured to:

set charging cut-off voltage values V;

divide the V into charging cut-off voltage intervals, wherein a minimum voltage value for the n th interval of the charging cut-off voltages is V n−1 , and a maximum voltage value for the n th interval is V n , and a minimum voltage value for the 1 st interval is a preset lower limit voltage value;

determine charging current values for the n th charging stage for the different temperature ranges, according to the n th interval and the different temperature ranges;

establish a mapping relationship between the different temperature ranges and the charging current values for the n th charging stage for the different temperature ranges.

11. The apparatus of claim 8 , wherein the processor is further configured to:

determine a temperature range in which the battery temperature is located;

determine a charging current value for the n th charging stage for the temperature range in which the battery temperature is located as the I n , according to the mapping relationship.

12. The apparatus of claim 8 , wherein I n <I n−1 .

13. The apparatus of claim 8 , wherein the processor is further configured to:

charge the battery with I j+1 after controlling I j to change to I j+1 at a predetermined rate.

14. The apparatus of claim 8 , wherein the battery comprises a nickel cobalt manganese power storage unit.

15. A computer-readable storage medium having computer instructions stored thereon which, when executed on a computer, cause the computer to perform the method for charging a battery of claim 1 .