Basic knowledge of electric moped (3)

1. The relationship between the battery and charger of electric mopeds. At present, the electric mopeds industry generally adopts two-stage (constant current-constant voltage-limiting current) and three-stage (constant current-constant voltage-floating charge) charging methods. , Although these two charging methods basically meetAccumulatorHowever, there is a lack of control measures for the gas output. Especially in the later stage of charging, the battery will overflow a large amount of gas, resulting in faster electrolyte loss; the electrode plate is strongly washed by the generated gas, causing the active material on the electrode plate to fall off and seriously shortening the battery life. It is common for batteries to be under-charged for a long time. Some manufacturers use dozens of times for full charge and increase the end-of-charge voltage for charging to increase battery capacity recovery. Although this has some effect to some extent, it also leads to Serious water loss of the battery. Therefore, both the battery and the charger are two important lifelines to the electric bicycle itself or to the future development of the electric bicycle. This bottleneck must be removed if electric scooters are to have a more satisfactory service life for consumers; if electric scooters are to have a broader living space, this difficulty must also be overcome.2. Simple inspection method of charger and controller. Charger inspection 1. Inspection method of charger composition: Discharge the battery and ammeter (shunt or precisionresistanceEtc.) Connect according to the above picture, turn on the mains, immediately measure the charging current and voltage, and make a record, then gradually adjust the resistance wire to slowly move the slider to the "2" direction, and carefully observe the current and voltage changes , And make a record until the charger shows sufficient or the charging is terminated. According to the measured data, compare the drawing points and the required charging parameters to determine whether it is reasonable. 2. Controller check: Adjustable resistance is connected in series between the battery pool and the controller. When the motor is rotating, the adjustable resistance will move from 1 to 2. When the motor stops, the voltage at point AB is recorded as the "undervoltage protection point". ".