QUICK CHARGE METHOD

• US 20110156660A1
• Filed: 07/02/2009
• Published: 06/30/2011
• Est. Priority Date: 09/28/2008
• Status: Active Grant

• Current Assignee: Guangzhou Fullriver Battery New Technology Company Limited
• Original Assignee: Guangzhou Fullriver Battery New Technology Company Limited
• Inventors: Zeng, Shihua, Tang, Shengcheng, Cheng, Dingbo
• Granted Patent: US 9,054,396 B2
• Time in Patent Office: Days
• US Class Current: 320/157
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

The present invention provides a quick charge method belonging to the field of the battery and particularly relates to a quick charge method for lithium ion battery and polymer lithium ion battery. During a battery is being charged, the battery stops charging when the battery is charged to a charge limit voltage, and the charge limit voltage between two poles of the battery is set to be U=2U₀−U_s, and U_s is a stabilized voltage which the voltage of the battery falls back to after the voltage of the battery is charged to U₀ at a constant current, U₀ is a standard charge cutoff voltage used by a low rate constant current-constant voltage charging mode which is normally accepted by the industries, and the stabilized voltage U_s is selected as follows: timing begins when the battery stops charging at the constant current, and from a certain time segment, when the drop of an open-circuit voltage of the battery is less than a certain value within the certain time segment, which means that the voltage of the battery is stable, and a voltage corresponding to the first time point of this time segment is selected as the stabilized voltage U_s of the battery.

Claims

1. A quick charge method, during a battery is being charged, the battery stops charging when the battery is charged to a charge limit voltage, characterized in that the charge limit voltage between two poles of the battery is set to be U=2U₀-U_s,

U_s is a stabilized voltage which the voltage of the battery falls back to after the voltage of the battery is charged to U₀ at a constant current,

and U₀ is a standard charge cutoff voltage used by a low rate constant current-constant voltage charging mode which is normally accepted by the industries.

2. A quick charge method according to claim 1, characterized in that the stabilized voltage U_s is selected in such a manner that timing begins when the battery stops charging at the constant current and starts to be in abeyance, and from a certain time segment, the drop of an open-circuit voltage of the battery is less than a certain value within the certain time segment, which means that the voltage of the battery is stable, and a voltage corresponding to the first time point of this time segment is selected as the stabilized voltage U_s of the battery.

3. A quick charge method according to claim 1, which is characterized in that the battery stops charging when the battery is charged to U at the constant current.

4. A quick charge method according to claim 1, characterized in that timing begins when the battery stops charging at the constant current and starts to be in abeyance, every 5 minutes serves as one time segment, and from a certain time segment, the drop of an open-circuit voltage of the battery is less than 2 mV within this time segment of 5 minutes, which means that the voltage of the battery is stable, and a voltage corresponding to the first time point of this time segment is selected as the stabilized voltage U_s of the battery.

5. A quick charge method according to claim 1, characterized in that timing begins when the battery stops charging at the constant current and starts to be in abeyance, every 10 minutes serves as one time segment, and from a certain time segment, the drop of an open-circuit voltage of the battery is less than 1 mV within this time segment of 10 minutes, which means that the voltage of the battery is stable, and a voltage corresponding to the first time point of this time segment is selected as the stabilized voltage U_s of the battery.