Charging duration determining method, BMS, battery, and electrical device

1 . A charging duration determining method, comprising:

determining a charge temperature of a battery;

activating, in response to the charge temperature being outside a first specified range, a thermal management device and controlling a charger such that a portion of a charge current is used by the thermal management device to adjust the charge temperature during a first duration and a remaining portion is supplied to the battery, the first duration being a duration to be taken to adjust the charge temperature of the battery to the first specified range;

estimating, in response to the charge temperature exceeding the first specified range, the first duration;

determining, for the first duration, an effective charge current for the battery as a difference between the charge current of the charger and a current consumed by the thermal management device;

determining a first state of charge (SOC) of the battery of which the charge temperature reaches the first specified range based on a current SOC of the battery, a cell capacity of the battery, the effective charge current, and the first duration;

estimating a second duration to be taken to charge the battery from the first SOC to a target SOC after the charge temperature of the battery has been adjusted to the first specified range;

determining, based on a charge start time of the battery, the first duration, and the second duration, a duration to be taken to charge the battery to the target SOC; and

controlling the charger, after the charge temperature is within the first specified range, to charge the battery toward the target SOC in accordance with the determined duration.

2 . The method according to claim 1 , wherein the estimating the first duration comprises:

calculating the first duration based on the charge temperature, a target temperature to which the temperature is to be adjusted, and a temperature rise rate, wherein the target temperature to which the temperature is to be adjusted is a value in the first specified range, and the charge temperature is lower than a minimum value in the first specified range.

3 . The method according to claim 1 , wherein the estimating the first duration comprises:

calculating the first duration based on the charge temperature, a target temperature to which the temperature is to be adjusted, and a temperature drop rate, wherein the target temperature to which the temperature is to be adjusted is a value in the first specified range, and the charge temperature is higher than a minimum value in the first specified range.

4 . The method according to claim 1 , wherein the estimating the second duration to be taken to charge the battery from the first SOC to the target SOC comprises:

determining a to-be-charged capacity of the battery based on the first SOC, the target SOC, and the cell capacity of the battery; and

calculating the second duration based on the to-be-charged capacity and the charge current of the charger.

5 . The method according to claim 4 , wherein the determining the first SOC of the battery of which the charge temperature reaches the first specified range comprises:

determining, when only adjusting the charge temperature of the battery, that a current SOC of the battery is the first SOC.

6 . The method according to claim 4 , wherein the method further comprises:

obtaining a maximum charge current of the charger and an actual output current coefficient of the charger; and

determining that a product of the maximum charge current and the actual output current coefficient is the charge current of the charger.

7 . The method according to claim 6 , wherein the obtaining the actual output current coefficient of the charger comprises:

determining the actual output current coefficient of the charger based on historical charge data of the battery.

8 . The method according to claim 6 , wherein the obtaining the actual output current coefficient of the charger comprises:

calculating the actual output current coefficient of the charger based on the maximum charge current of the charger and an actual charge current of the battery.

9 . The method according to claim 1 , wherein the method further comprises:

outputting, in response to arrival of a transmission period or a request message, information on the duration to be taken to charge the battery to the target SOC to a target object.

10 . A battery, comprising a processor and a storage medium storing a computer program that, when executed by the processor, implements a charging duration determining method including:

determining a charge temperature of a battery;

activating, in response to the charge temperature being outside a first specified range, a thermal management device and controlling a charger such that a portion of a charge current is used by the thermal management device to adjust the charge temperature during a first duration and a remaining portion is supplied to the battery, the first duration being a duration to be taken to adjust the charge temperature of the battery to the first specified range;

estimating, when the charge temperature exceeds the first specified range, the first duration;

determining, for the first duration, an effective charge current for the battery as a difference between the charge current of the charger and a current consumed by the thermal management device;

determining a first state of charge (SOC) of the battery of which the charge temperature reaches the first specified range based on a current SOC of the battery, a cell capacity of the battery, the effective charge current, and the first duration;

estimating a second duration to be taken to charge the battery from the first SOC to a target SOC after the charge temperature of the battery has been adjusted to the first specified range;

determining, based on a charge start time of the battery, the first duration, and the second duration, a duration to be taken to charge the battery to the target SOC; and

controlling the charger, after the charge temperature is within the first specified range, to charge the battery toward the target SOC in accordance with the determined duration.

11 . The battery according to claim 10 , wherein the estimating the first duration comprises:

calculating the first duration based on the charge temperature, a target temperature to which the temperature is to be adjusted, and a temperature rise rate, wherein the target temperature to which the temperature is to be adjusted is a value in the first specified range, and the charge temperature is lower than a minimum value in the first specified range.

12 . The battery according to claim 10 , wherein the estimating the first duration comprises:

calculating the first duration based on the charge temperature, a target temperature to which the temperature is to be adjusted, and a temperature drop rate, wherein the target temperature to which the temperature is to be adjusted is a value in the first specified range, and the charge temperature is higher than a minimum value in the first specified range.

13 . The battery according to claim 10 , wherein the estimating the second duration to be taken to charge the battery from the first SOC to a target SOC comprises:

determining a to-be-charged capacity of the battery based on the first SOC, the target SOC, and a cell capacity of the battery; and

calculating the second duration based on the to-be-charged capacity and the charge current of the charger.

14 . The battery according to claim 13 , wherein the determining the first SOC of the battery of which the charge temperature reaches the first specified range comprises:

determining, when only adjusting the charge temperature of the battery, that a current SOC of the battery is the first SOC.

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

obtaining a maximum charge current of the charger and an actual output current coefficient of the charger; and

determining that a product of the maximum charge current and the actual output current coefficient is the charge current of the charger.

16 . The battery according to claim 10 , wherein the method further comprises:

outputting, in response to arrival of a transmission period or a request message, information on the duration to be taken to charge the battery to the target SOC to a target object.

17 . An electrical device comprising a device body and the battery according to claim 10 .