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Quick charging method for improving storage battery specific capacity

A fast-charging, specific-capacity technology, applied in secondary battery charging/discharging, secondary battery repair/maintenance, etc., can solve problems such as insufficient charging of batteries, failure to propose charging management methods, etc., achieve fast charging and easy promotion Effect

Active Publication Date: 2010-02-03
GUANGZHOU FULLRIVER BATTERY NEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1961450A patent discloses a manufacturing method of a lithium-ion battery with a charging cut-off voltage exceeding 4.35V, but fails to propose a reasonable charging management method for this type of battery
Although this type of method can achieve the purpose of fast charging, because its charging method is based on the basis that the battery's stable voltage does not exceed 4.2V, it is insufficient for how to charge the battery with more power.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 501417HS10C high-rate polymer lithium-ion battery, rated capacity 50mAh, 1C rate current 50mA.

[0031] According to formula (4), select the original constant current fast charging current I 1 is the 4C rate current (200mA), and the constant current charging cut-off voltage U is obtained according to the formula (5) 1 is 4.36V.

[0032] According to the formulas (2) and (3), the values ​​of n are respectively selected as 1 and 2, and the values ​​of m are 2, 3 and 4 to obtain the constant current charging current I 2 They are 175mA and 150mA respectively; constant voltage (4.36V) charging cut-off currents are 100mA, 66.7mA and 50mA respectively.

[0033] Table 1

[0034] Charge

Way

charging system

when charging

Room (min)

C 1 (mAh)

Cycles

N (weeks)

after cycle

10C10V overcharge

[0035] performance

1

Original system: 200mA constant curr...

Embodiment 2

[0039] 452026HS10C high-rate polymer lithium-ion battery with a rated capacity of 130mAh and a 1C rate current of 130mA.

[0040] According to formula (4), select the original constant current fast charging current I 1 It is the 6C rate current (780mA), and the constant current charging cut-off voltage U is obtained according to the formula (5) 1 is 4.41V.

[0041]According to formulas (2) and (3), the values ​​of n are 1, 2, and the values ​​of m are 2, 3, and 4, respectively, and the constant current charging current I is obtained. 2 They are 715mA and 650mA respectively; the constant voltage (4.41V) charging cut-off currents are 390mA, 260mA and 195mA respectively.

[0042] Table 2

[0043]

Charge

Way

charging system

when charging

Room (min)

C 1 (mAh)

Cycles

N (week)

after loop

10C10V overcharge

performance

1

Original s...

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PUM

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Abstract

The invention discloses a quick charging method for improving storage battery specific capacity, belonging to the field of batteries. On the basis of quick charging from constant current I1 to stopping at U1, the method of the invention reduces quick charging flow I1 to I2, converts to constant-voltage charging after the voltage is charged to U1 and stops charging until that the current is reducedto Iz. I0 is battery 1C multiplying power current, and n is an integer selected from 1-I2 / I0. Iz is as follows: Iz= I1 / m, wherein, m is a positive integer not smaller than 2. The invention can be manufactured into a charger and is simple, effective, practical, easy to popularize and quick to charge and can charge electric quantity as much as possible.

Description

technical field [0001] The invention relates to a fast charging method for increasing the specific capacity of a storage battery, which belongs to the field of batteries, and in particular relates to a fast charging method for a lithium ion battery and a polymer lithium ion battery. Background technique [0002] With the rapid development of mobile electrical equipment, the capacity and fast charging performance of secondary lithium-ion batteries are getting higher and higher. For a specific battery, people hope to find a charging method that takes into account the charging capacity and charging time. Way. The charging capacity of a lithium-ion secondary battery is proportional to the amount of lithium extracted from the positive electrode during charging. Increasing the stable voltage of the battery after charging is conducive to the extraction of more lithium from the positive electrode to achieve the purpose of charging more electricity. Considering that the structure of...

Claims

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Application Information

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IPC IPC(8): H01M10/44
CPCY02E60/12Y02E60/10
Inventor 成定波赖晓强唐胜成曾石华
Owner GUANGZHOU FULLRIVER BATTERY NEW TECH
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