| 摘要 |
<p>In a charger system, a charging method, and a secondary battery system, a smoothing capacitor can be minimized further. A smoothing capacitor (C2) having high impedance as compared with a secondary battery is disposed and moreover, charging control means (4) for receiving a DC voltage and supplying a predetermined constant voltage to the secondary battery (5), switch means (SW1) connected in parallel with the charging control means, and switch control means (12) for sending a control signal in accordance with a detection result of a terminal voltage of the secondary battery to open or close the switch means, and for supplying a DC voltage to the secondary battery through the switch means when the terminal voltage is lower than a predetermined charging standard voltage and for supplying a DC voltage to the secondary battery through the charging control means when the terminal voltage reaches the charging standard voltage are provided. Charging control to maintain a constant voltage is performed only during a period of time after the charging voltage has reached the charging standard voltage, thereby making it possible to disregard the increase of pulsating components before or after the terminal voltage reaches the charging standard voltage. <IMAGE></p> |
