Battery controller and method for suppression of lithium plating during charging

1. A battery charging method, comprising:

performing a charging process on a battery; and

monitoring an electrical parameter of the battery during the charging process; wherein the charging process consists of the following steps:

when the electrical parameter of the battery reaches a first threshold, suspending charging of the battery and discharging the battery by applying a first negative pulse for a first duration of t 1 ;

continuing to charge the battery after discharging the battery for the first duration of t 1 ;

when the electrical parameter of the battery reaches a second threshold, suspending charging of the battery and discharging the battery by applying a second negative pulse for a second duration of t 2 ; and

continuing to charge the battery after discharging the battery for the second duration of t 2 ;

wherein the first duration t 1 is greater than or equal to 3 seconds and less than 13 seconds, the second duration t 2 is greater than 3 seconds and less than or equal to 13 seconds, and t 1 is less than t 2 ; and

wherein the electrical parameter is state of charge (SOC), and the first threshold is lower than the second threshold.

2. The battery charging method according to claim 1 , wherein a negative electrode material of the battery comprises graphite.

3. The battery charging method according to claim 1 , wherein

the first threshold is an SOC of 35% to 45%; and

the second threshold is an SOC of 70% to 80%.

4. The battery charging method according to claim 1 , wherein the method further comprises:

determining whether the electrical parameter of the battery meets a charge stop condition; and

stopping charging of the battery when the electrical parameter of the battery meets the charge stop condition.

5. A battery charging controller, comprising one or more processors, wherein the processors work individually or jointly, and the processors are configured to:

perform a charging process on a battery; and

monitor an electrical parameter of the battery during the charging process;

wherein the charging process consists of the following steps:

when the electrical parameter of the battery reaches a first threshold, suspending charging of the battery and discharging the battery by applying a first negative pulse for a first duration of t 1 ;

continuing to charge the battery after discharging the battery for the first duration of t 1 ;

when the electrical parameter of the battery reaches a second threshold, suspending charging of the battery and discharging the battery by applying a second negative pulse for a second duration of t 2 ; and

continuing to charge the battery after discharging the battery for the second duration of t 2 ;

wherein the first duration t 1 is greater than or equal to 3 seconds and less than 13 seconds, the second duration t 2 is greater than 3 seconds and less than or equal to 13 seconds, and t 1 is less than t 2 ; and

wherein the electrical parameter is state of charge (SOC), and the first threshold is lower than the second threshold.

6. The battery charging controller according to claim 5 , wherein a negative electrode material of the battery comprises graphite.

7. The battery charging controller according to claim 5 , wherein

the first threshold is an SOC of 35% to 45%; and

the second threshold is an SOC of 70% to 80%.

8. The battery charging controller according to claim 5 , wherein the processors are further configured to:

determine whether the electrical parameter of the battery meets a charge stop condition;

stop charging of the battery when the electrical parameter of the battery meets the charge stop condition.

9. A battery management system, comprising:

at least one processor; and

a memory coupled to the at least one processor,

wherein the memory stores an instruction executable by the at least one processor, and when the instruction is executed by the at least one processor, the at least one processor is configured to:

perform a charging process on a battery; and

monitor an electrical parameter of the battery during the charging process;

wherein the charging process consists of the following steps:

when the electrical parameter of the battery reaches a first threshold, suspending charging of the battery and discharging the battery by applying a first negative pulse for a first duration of t1;

continuing to charge the battery after discharging the battery for the first duration of t1;

when the electrical parameter of the battery reaches a second threshold, suspending charging of the battery and discharging the battery by applying a second negative pulse for a second duration of t2; and

continuing to charge the battery after discharging the battery for the second duration of t2;

wherein the first duration t 1 is greater than or equal to 3 seconds and less than 13 seconds, the second duration t 2 is greater than 3 seconds and less than or equal to 13 seconds, and t 1 is less than t 2 ; and

wherein the electrical parameter is state of charge (SOC), and the first threshold is lower than the second threshold.

10. The battery management system according to claim 9 , wherein a negative electrode material of the battery comprises graphite.

11. The battery management system according to claim 9 , wherein

the first threshold is an SOC of 35% to 45%; and

the second threshold is an SOC of 70% to 80%.

12. The battery management system according to claim 9 , wherein the at least one processor is further configured to:

determine whether the electrical parameter of the battery meets a charge stop condition; and

stop charging of the battery when the electrical parameter of the battery meets the charge stop condition.