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Fast charging method

A technology of fast charging and charging limitation, which is applied in the direction of secondary battery charging/discharging, current collectors, electric vehicles, etc., can solve the problems of limited application range, inapplicability, and inability to be popularized and applied, and achieve the effect of easy promotion

Active Publication Date: 2010-10-13
GUANGZHOU FULLRIVER BATTERY NEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Use the method disclosed in patent ZL200610034990.6 to select the high-current charging termination voltage. In some cases, the battery is not fully charged and the range of use is limited.
[0004] Over the years, researchers have proposed many fast charging methods, some methods can be applied on special occasions, and some methods make chargers that are cumbersome, expensive, or inapplicable, and cannot be popularized and applied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1: Performance test of high-rate fast-charging polymer lithium-ion battery

[0051] 1. Battery model: 502026HS20QC

[0052] Nominal capacity: 130mAh

[0053] V is taken according to the dispersion of positive and negative electrode materials, formulations, battery design and production used in 502026HS20QC 0 = 4.2V, V k =-0.03V is charged at a rate of 10, according to equation (3):

[0054] V Z =4.2+0.0272×10-0.03=4.442

[0055] select V Z =4.442V

[0056] 2. Test content

[0057] ①Basic parameters: battery thickness, width, height, weight, internal resistance and voltage, 10 pieces, calculate the average value.

[0058] ②6-minute fast charging test: 10 times charging, choose the charging termination voltage as 4.442V - test 10 batteries

[0059] (1) 130mA (1 times rate) constant current discharge to 3.0V cut-off;

[0060] (2) Set aside for 5 minutes;

[0061] (3) 1300mA (10 times) constant current charging to 4.442V cut-off, time limit 6min; (6 minut...

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Abstract

The invention relates to a quick charging method, which belongs to the field of batteries, in particular to a method for quickly charging lithium ion, polymer lithium ion batteries. The method comprises adopting constant-current big current to charge, and charging terminal voltage is bigger than widely-known charging limiting voltage, the big-current charging terminal voltage of the method and a widely-known charging limiting voltage are in accordance with a function formula: VZ=V0+DeltaV+-Vk(1), wherein VZ is charging terminal voltage, V0 is widely-known constant-current constant-voltage charging limiting voltage, DeltaV=0.0272N+0.0008, and N=charging current / rated capacity of a battery in value. Vk is a corrected parameter which relates to the formula and the design of batteries and thedispersion of production, and the parameter is +-0.5. The method stops charging when constant current is charged to VZ, and charging is finished. The method is simple, effective and practical, which has easy popularization and fast charging, and can charge electricity as much as possible.

Description

technical field [0001] The fast charging method of the invention belongs to the field of batteries, in particular to a fast charging method for lithium-ion and polymer lithium-ion batteries. Background technique [0002] Lithium-ion batteries or polymer lithium-ion batteries have a known charging limit voltage when charging, and the charging is carried out in a constant current and constant voltage mode, that is: first charge with a constant current, and then change to a known charging limit voltage when charging to a known charging limit voltage. The charging limit voltage is constant voltage charging, at this time the charging current is gradually reduced, and when it is reduced to 1 / 20 times, the charging is stopped. During constant current charging, the voltage at both ends of the battery consists of two parts, one part is the potential difference between the positive and negative electrodes of the battery, including various polarization voltages and the stable voltage b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/04H01M10/44
CPCY02E60/10
Inventor 张翠芬曾石华张健鸿成定波
Owner GUANGZHOU FULLRIVER BATTERY NEW TECH