Automatic charger for electric bicycle when gliding and riding

The utility model relates to an automatic charger for an electric bicycle when gliding and riding. The utility model is composed of two or more batteries, a relay, a manual rotary switch, a linked switch controlled by a magnet, a diode and an electric motor. Two adjacent batteries are connected together by a normally open contact and a normally closed contact of the relay. When the normally closed contact is attracted and closed, two adjacent batteries are connected in series. When the normally open contact is attracted and closed, two adjacent batteries are connected in parallel. The positive pole of the first battery is connected with the positive pole of the electric motor. After the manual rotary switch is connected with the diode in parallel, the manual rotary switch is connected between the negative pole of the last battery and the negative pole of the electric motor. The manual rotary switch is linked with the linked switch controlled by the magnet. After the relay is connected with the linked switch controlled by the magnet in series, the relay is connected between the positive pole and the negative pole of any battery. The utility model has the advantage of simple structure, large charge current and long traveling mileage, and the charging process can be fully and automatically completed.