Charging method for battery pack, computer-readable storage medium, and power consuming apparatus

Patent metadata

Field	Value
Publication number	US-12255485-B2
Application number	US-202318455076-A
Country	US
Kind code	B2
Filing date	Aug 24, 2023
Priority date	Nov 5, 2021
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

A charging method for a battery pack includes sending, by a battery management module of the battery pack, a charging request for a first current to a charging pile for charging, controlling, by the battery management module in response to determining that first-current charging of the battery pack meets a first predetermined condition, the battery pack to perform pulse discharge, and controlling, by the battery management module in response to determining that the pulse discharge of the battery pack meets a second predetermined condition, the battery pack to stop discharging, and sending a charging request for a second current to the charging pile for charging. The second current is less than the first current.

First claim

What is claimed is:

1. A charging method for a battery pack comprising a battery management module, the charging method comprising:
sending, by the battery management module, a charging request for a first current to a charging pile for charging;
controlling, by the battery management module in response to determining that first-current charging of the battery pack meets a first predetermined condition, the battery pack to perform pulse discharge;
controlling, by the battery management module in response to determining that the pulse discharge of the battery pack meets a second predetermined condition, the battery pack to stop discharging, and sending a charging request for a second current to the charging pile for charging, wherein the second current is less than the first current;
determining, by the battery management module, a ratio of an amount of precipitated lithium of the battery pack to a threshold of precipitated lithium, and determining, by the battery management module, magnitude of the first current based on the ratio;
wherein the threshold of precipitated lithium is an amount of precipitated lithium that triggers an internal short circuit in the battery pack.

2. The charging method according to claim 1 , wherein controlling, by the battery management module in response to determining that the first-current charging of the battery pack meets the first predetermined condition, the battery pack to perform the pulse discharge comprises:
controlling, by the battery management module in response to determining that the battery pack is continuously charged with the first current for a predetermined duration, the battery pack to perform the pulse discharge.

3. The charging method according to claim 1 , wherein the controlling, by the battery management module in response to determining that first-current charging of the battery pack meets the first predetermined condition, the battery pack to perform the pulse discharge comprises:
controlling, by the battery management module in response to determining that a state of charge (SOC) of the battery pack reaches a predetermined value, the battery pack to perform pulse discharge.

4. The charging method according to claim 1 , wherein controlling, by the battery management module in response to determining that the first-current charging of the battery pack meets the first predetermined condition, the battery pack to perform the pulse discharge comprises:
sending, by the battery management module in response to determining that the first-current charging of the battery pack meets the first predetermined condition, a charging request for a current of 0 A to the charging pile, and obtaining a real-time charging current, wherein the real-time charging current is a current used by the charging pile to charge the battery pack; and
controlling, by the battery management module in response to determining that the real-time charging current is less than a threshold of the first current, controlling the battery pack to discharge with a discharging current, and obtaining, by the battery management module, a discharging duration for which the battery pack discharges with the discharging current.

5. The charging method according to claim 1 , wherein controlling, by the battery management module in response to determining that the first-current charging of the battery pack meets the first predetermined condition, the battery pack to perform the pulse discharge comprises:
sending, by the battery management module in response to determining that the first-current charging of the battery pack meets the first predetermined condition, a charging request for a current of 0 A to the charging pile, obtaining a real-time charging current, and obtaining a request duration of the charging request for the current of 0 A, wherein the real-time charging current is a current used by the charging pile to charge the battery pack; and
controlling, by the battery management module in response to determining that the real-time charging current is less than a threshold of the first current, the battery pack to discharge with a discharging current, and obtaining, by the battery management module, a discharging duration for which the battery pack discharges with the discharging current.

6. The charging method according to claim 5 , wherein controlling, by the battery management module in response to determining that the pulse discharge of the battery pack meets the second predetermined condition, the battery pack to stop discharging comprises:
controlling, by the battery management module in response to determining that the discharging duration reaches a first duration threshold or the request duration reaches a second duration threshold, the battery pack to stop discharging.

7. The charging method according to claim 1 , wherein controlling, by the battery management module in response to determining that the first-current charging of the battery pack meets the first predetermined condition, the battery pack to perform the pulse discharge comprises:
controlling, by the battery management module in response to determining that the first-current charging of the battery pack meets the first predetermined condition, the battery pack to perform the pulse discharge to the charging pile or a power consuming apparatus, wherein the battery pack is located in the power consuming apparatus.

8. A computer-readable storage medium storing computer instructions, wherein when the computer instructions are executed, the charging method according to claim 1 is performed.

9. A power consuming apparatus, comprising a battery pack, wherein the battery pack is configured to perform the charging method according to claim 1 .

Assignees

• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Xie Lan
• Lin Zhen
• Huang Shan
• Li Wei
• Li Shichao

Classifications

• H02J7/927 Primary

  with introduction of pulses during the charging process · CPC title

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J7/971

  the charge cycle being controlled or terminated in response to non-electric parameters · CPC title

• H02J7/94 Primary

  in response to battery current · CPC title

• H02J7/875

  Charging or discharging for charge maintenance, battery initiation or rejuvenation · CPC title