发明名称 |
PROTECTIVE CIRCUIT, BATTERY CHARGER, AND POWER STORAGE DEVICE |
摘要 |
A low-power protective circuit includes a detection unit that intermittently detects a voltage across a secondary battery; a battery management unit that includes a buffer memory device and a processor and determines, based on a value of the voltage, whether the secondary battery needs to be charged; a switch circuit that establishes or breaks electrical continuity between a host system and the secondary battery; a switch control unit that turns on or off the switch circuit in accordance with the judgment made by the battery management unit; a switch that controls supply of power supply voltage from the secondary battery to the battery management unit; and a power controller that intermittently stops supply of the power supply voltage to the battery management unit by turning off the switch.
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申请公布号 |
US2013257354(A1) |
申请公布日期 |
2013.10.03 |
申请号 |
US201313795243 |
申请日期 |
2013.03.12 |
申请人 |
SEMICONDUCTOR ENERGY LABORATORY CO., LTD. |
发明人 |
KOYAMA JUN |
分类号 |
H02J7/00 |
主分类号 |
H02J7/00 |
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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