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Method for charging secondary battery

A charging method and secondary battery technology, which are applied in the direction of secondary battery charging/discharging, secondary battery, secondary battery repair/maintenance, etc., can solve problems such as battery performance degradation, and achieve the effect of reducing charging time

Active Publication Date: 2015-02-04
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it takes a lot of time to charge the battery
[0008] In addition, in the conventional charging method, in which a high charging rate current is supplied to the battery in order to increase the charging speed, the performance of the battery is degraded

Method used

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Examples

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Comparison scheme
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Embodiment Construction

[0031] The present invention will now be described in more detail with reference to the following examples. These examples are provided only to illustrate the present invention, and these examples should not be construed as limiting the scope and spirit of the present invention.

[0032]

[0033] The charging time and charging amount based on the constant current (CC) charging results of Example 1 and Comparative Examples 1 to 4 at a temperature of 30° C. are shown in Table 1 below.

[0034] [Table 1]

[0035]

[0036] It can be seen from Example 1 of Table 1 above that in the case where the stepwise charging method according to the present invention is used, it is possible to increase the charging capacity of the battery without a large loss due to charging time. Therefore, it is possible to reduce the high voltage time, thereby improving the life characteristics of the battery while preventing battery degradation.

[0037]

[0038] The charging time and charging bas...

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Abstract

The present invention includes: a first charging step for charging at a first C-rate from an initial charging voltage to a first charging voltage; and a second charging step for completing a charging process so as to reach a target voltage, after reaching the first charging voltage, by gradually decreasing the C-rate within a range not exceeding the first C-rate. The method for charging a secondary battery according to the present invention is capable of preventing the battery from deteriorating and thus improving the lifespan of the battery.

Description

technical field [0001] The present invention relates to a method for charging a secondary battery, and more particularly to a method for charging a secondary battery, the method comprising charging the secondary battery from an initial charging voltage to a first charging rate at a first charging rate (C-rate). The first charging step of the charging voltage, and after the voltage of the secondary battery reaches the first charging voltage, while gradually reducing the charging rate within the range not exceeding the first charging rate, charging the secondary battery to the second of the target voltage Charging steps. Background technique [0002] In recent years, as mobile devices such as portable computers, mobile phones, and cameras have been increasingly developed and demand for these mobile devices has increased, the demand for secondary batteries used as energy sources for mobile devices has also increased dramatically. One of these secondary batteries is a lithium s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/04H01M10/44
CPCH01M10/44H01M10/446H02J7/0077H01M10/052H02J7/045H02J7/0071H02J7/00712Y02E60/10H02J7/04H02J7/007182H02J7/00
Inventor 金大桓郑丞训
Owner LG ENERGY SOLUTION LTD
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