发明授权
- 专利标题: Battery state monitoring circuit having differentiating circuit
- 专利标题(中): 电池状态监控电路具有微分电路
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申请号: US09806288申请日: 2001-08-24
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公开(公告)号: US06489749B1公开(公告)日: 2002-12-03
- 发明人: Takao Nakashimo , Hiroshi Mukainakano
- 申请人: Takao Nakashimo , Hiroshi Mukainakano
- 优先权: JP11-222849 19990805
- 主分类号: H01M1046
- IPC分类号: H01M1046
摘要:
The present invention relates to an improvement in the safety and a reduction in a current consumption in a battery device which is capable of calculating the remaining amount of a lithium ion secondary battery. If the charging and discharging current becomes equal to or lower than a given value, circuits including a current monitoring circuit operate so as to reduce the current consumption. In this situation, the current monitoring circuit stops to function. A control circuit is connected with a differentiating circuit, and if a voltage between both ends of the sense resistor changes, a charging and discharging current monitoring circuit is again operated. With the above solving means, the current consumption can be suppressed, and a precision in the current monitor can be enhanced.