发明授权
- 专利标题： Power supply device having low internal power consumption and electronic appliances using said power supply device
- 专利标题（中）： 具有低内部功耗的电源装置和使用所述电源装置的电子设备
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申请号： US511350申请日： 1995-08-04
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公开(公告)号： US5872445A公开(公告)日： 1999-02-16
- 发明人: Hidekiyo Ozawa , Masafumi Okumura , Hidetoshi Yano , Mituo Saeki
- 申请人： Hidekiyo Ozawa , Masafumi Okumura , Hidetoshi Yano , Mituo Saeki
- 申请人地址： JPX Kawasaki
- 专利权人： Fujitsu Limited
- 当前专利权人： Fujitsu Limited
- 当前专利权人地址： JPX Kawasaki
- 优先权： JPX6-215436 19940909
- 主分类号： H02J7/00
- IPC分类号： H02J7/00 ; H02J7/10 ; H02J7/34 ; H02J7/04
摘要：
A power supply device includes a secondary battery and a charger, and can further utilize an external D.C. power supply. A switch is interposed between a negative electrode of the secondary battery and the ground. This switch is turned OFF when the external D.C. power supply is connected to the power supply device, and is turned ON when the external D.C. power supply is removed from the power supply device. The charger controls the charge of the secondary battery from the external D.C. power supply by regulating the potential of the negative electrode of the battery. A contact remains OFF while the external D.C. power supply is connected to the power supply device. In consequence, a current does not directly flow from the external D.C. power supply to the secondary battery. Therefore, a back-flow prevention diode, which otherwise results in power consumption, need not be disposed between the secondary battery and the load.
公开/授权文献
- US5125820A Injection pressure control apparatus for a die cast machine 公开/授权日：1992-06-30
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