Charging discharging apparatus for super capacitor modules

A charging discharging apparatus applied to an input power apparatus, a power load apparatus, a first super capacitor module and a second super capacitor module, a negative terminal of the first super capacitor module connected to ground, the charging discharging apparatus comprising:

• a control unit;
• a first switch unit electrically connected to the control unit, the input power apparatus and the power load apparatus;
• a second switch unit electrically connected to the control unit, the power load apparatus, the first switch unit and the second super capacitor module;
• a third switch unit electrically connected to the control unit, the second switch unit, the second super capacitor module and the first super capacitor module;
• a fourth switch unit electrically connected to the control unit, a negative terminal of the second super capacitor module, the third switch unit and the first super capacitor module;
• and
• a fifth switch unit electrically connected to the control unit, the fourth switch unit, the negative terminal of the first super capacitor module, the negative terminal of the second super capacitor module and ground,
• wherein when the input power apparatus sends an input power to the charging discharging apparatus, the control unit turns off the second switch unit and the fourth switch unit, and the control unit turns on the first switch unit, the third switch unit and the fifth switch unit, so that the power load apparatus receives the input power through the first switch unit, and the first super capacitor module is connected to the second super capacitor module in parallel, and the first super capacitor module and the second super capacitor module are charged;
• wherein when the input power apparatus stops sending the input power to the charging discharging apparatus, the control unit turns off the first switch unit, the third switch unit and the fifth switch unit, and the control unit turns on the second switch unit and the fourth switch unit, so that the first super capacitor module is connected to the second super capacitor module in series, and the first super capacitor module and the second super capacitor module discharge to the power load apparatus through the second switch unit and the fourth switch unit.