Quick testing of batteries in lithium-ion battery packs with impedance-measuring technology

被引：50

作者：

Takeno, K

Ichimura, M

Takano, K

Yamaki, J

Okada, S

机构：

[1] NTT DoCoMo, Chiyoda Ku, Tokyo 1006150, Japan

[2] NTT Corp, BTI, Musashino, Tokyo 1800012, Japan

[3] Kyushu Univ, Kasuga, Fukuoka 8168580, Japan

来源：

JOURNAL OF POWER SOURCES | 2004年 / 128卷 / 01期

关键词：

capacity; deterioration; Li-ion battery; battery pack; impedance;

D O I：

10.1016/j.jpowsour.2003.09.045

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We discuss a rapid testing of capacity in Li-ion battery packs with impedance-measuring technology to evaluate their capability in mobile phones. Our measurements of the capacity and impedance at 1 kHz for various kinds of battery packs conclusively proved that there is a strong correlation between capacity and impedance. It can be applied even when the pack consists of not only a Li-ion battery but also a Positive Temperature Coefficient (PTC) device and a protection circuit in-series, and this correlation is largely unaffected by the degree of charge. The results we obtained from measuring impedance revealed the possibility of quickly assessing degradation in Li-ion battery packs. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：67 / 75

页数：9

共 7 条

[1]

*2001 TYC EL CORP, 2001, RAYCH CIRC PROT TECH, P2

[2] Factors that affect cycle-life and possible degradation mechanisms of a Li-ion cell based on LiCoO2 [J].