Abstract
Solar panels convert solar energy into electrical energy stored in the battery and provide power for the solar street lamp. The voltage of solar panel power supplying is not stable, resulting in the problem of over charge and over discharge for battery in the use process of solar street lamp. The above problems lead to the battery life is reduced, and the service life of the solar street lamp is directly affected. In order to solve the above problems, the protective circuit of the battery was designed in this paper, including charging circuit design, discharging circuit design, voltage detection circuit design and current detection circuit design.
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