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    • 2. 发明授权
    • Protection circuit for a battery charger
    • 电池充电器保护电路
    • US4868706A
    • 1989-09-19
    • US140583
    • 1988-01-04
    • George Zaderej
    • George Zaderej
    • H02H3/087H02J7/00H02J7/02
    • H02J7/027H02H3/087H02J7/0034H02J7/008
    • A protection circuit for a battery charger for safely charging a battery from a remote electrical power supply is disclosed. The protection circuit includes a power control means responsive to input from the remote power supply; an overload sensing means responsive to the power control means and to the negative polarity of the battery; a main switching means responsive to the overload sensing means and to the power control means wherein the main switching means controllably limits current output in the presence of a slight overload condition, and deactuates the battery charger in the presence of a large overload condition. An indicating means, such as a light emitting diode is preferably disposed between the power control means and the main switching means, to signal when the battery is being properly charged, and is deactuated when a short circuit occurs across the positive and negative terminals of the battery, or when the polarity is reversed at the battery terminals, or when the battery charger deactuates due to an overload condition.
    • 公开了一种用于从远程电源安全地对电池充电的电池充电器的保护电路。 保护电路包括响应于远程电源的输入的功率控制装置; 响应于功率控制装置和电池的负极性的过载感测装置; 响应于过载感测装置和功率控制装置的主开关装置,其中主开关装置在存在轻微过载状况的情况下可控地限制电流输出,并且在存在大的过载状况的情况下使电池充电器停止。 诸如发光二极管的指示装置优选地设置在功率控制装置和主开关装置之间,以在电池正确充电时发出信号,并且当短路发生在正极和负极端子 电池或者电池端子的极性反转时,或由于过载条件使电池充电器停止工作。