In recent years, the so-called three-stage charger is widely used in electric vehicles. The first stage is called the constant current stage, the second stage is the constant voltage stage, and the third stage is the trickle stage.
From the point of view of electronic technology, the first stage is called charging current limiting stage, the second stage is called high constant voltage stage, and the third stage is called low constant voltage stage.
When the second and third stages are converted, the panel indicator lights change accordingly. Most chargers of best ladies electric bike 2017 have red lights in the first and second stages, and green lights in the third stage. The conversion between the second stage and the third stage is determined by the charging current, which is larger than a certain current to enter the first and second stage, and less than a certain current to enter the third stage. This current is called a conversion current, also known as a turning current.
Although the early chargers, including those used in famous cars, changed lights, they were actually constant voltage current limiting chargers, not three-stage chargers. Generally, this kind of cell is a stable voltage of about 44.2v, which is suitable for the high specific sulfuric acid cell at that time.