To improve the battery life of windlight complementary system, so we design a new fast charging system. Using Ah measurement to ensure the battery SOC estimation, and adjust the state of battery charging in real time. Through analyzing the traditional three stages of battery charging and battery charging characteristics easily influenced by external environment, we build windlight complementary system battery quick charging control strategy. The experimental results show that the charging control strategy can improve the charging speed and prolong service life by adjusting charging current when the external environment disturbance changes.