发明名称 |
Charger for lithium secondary battery and electronic apparatus including charger |
摘要 |
A charger for a secondary battery including a positive electrode, a negative electrode including lithium-containing silicon represented by the composition formula Li<SUB>x</SUB>Si, and an electrolyte. This charger includes: (1) a voltage detector that detects voltage of the secondary battery that is being charged; and (2) a charge controller that calculates the value x in Li<SUB>x</SUB>Si included in the secondary battery from an output of the voltage detector and stops the charging of the secondary battery when the calculated value x reaches a predetermined threshold value. The charge controller has at least one settable threshold value including a first threshold value, and the first threshold value is 2.33 or less. The use of this charger makes it possible to charge the secondary battery such that it has a high capacity, or a higher capacity if necessary, without accelerating the deterioration of cycle life.
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申请公布号 |
US7248023(B2) |
申请公布日期 |
2007.07.24 |
申请号 |
US20050108746 |
申请日期 |
2005.04.19 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
TAKEZAWA HIDEHARU;KURANUKI MASAAKI;BITO YASUHIKO |
分类号 |
H02J7/04;H02J7/00;H02J7/16 |
主分类号 |
H02J7/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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