(JP2000116025-A)   NOVELTY - A first electric energy storing device (111) is connected to a battery through a first switching device (103a). A second switching device (103b) is connected to a first electric energy storing device (111). An input terminal of a voltage detector (110) is connected to the first electric energy storing device (111) through the second switching device (103b).    USE - In a battery such as lithium secondary battery or an electric double layer capacitor and a battery apparatus comprising many batteries connected in series. In electric equipment such as an uninterruptible electric power supply system using the battery or the like, or a battery apparatus of a motor for an electric bicycle or an electric vehicle.    ADVANTAGE - The ripple in voltage and current can be reduced to improve the detecting accuracy and the reliability of the voltage and the current, and temperature rise of the batteries can be reduced to improve the safety, the lifetime and the performance of the batteries. The battery apparatus can be made light in weight, small in size, low in cost and high in safety. A large current and high voltage battery apparatus can be made.    (JP2000184611-A)   NOVELTY - A first electric energy storing device (111) is connected to a battery through a first switching device (103a). A second switching device (103b) is connected to a first electric energy storing device (111). An input terminal of a voltage detector (110) is connected to the first electric energy storing device (111) through the second switching device (103b).    USE - In a battery such as lithium secondary battery or an electric double layer capacitor and a battery apparatus comprising many batteries connected in series. In electric equipment such as an uninterruptible electric power supply system using the battery or the like, or a battery apparatus of a motor for an electric bicycle or an electric vehicle.    ADVANTAGE - The ripple in voltage and current can be reduced to improve the detecting accuracy and the reliability of the voltage and the current, and temperature rise of the batteries can be reduced to improve the safety, the lifetime and the performance of the batteries. The battery apparatus can be made light in weight, small in size, low in cost and high in safety. A large current and high voltage battery apparatus can be made.    (US6157165-A)   NOVELTY - A first electric energy storing device (111) is connected to a battery through a first switching device (103a). A second switching device (103b) is connected to a first electric energy storing device (111). An input terminal of a voltage detector (110) is connected to the first electric energy storing device (111) through the second switching device (103b).    USE - In a battery such as lithium secondary battery or an electric double layer capacitor and a battery apparatus comprising many batteries connected in series. In electric equipment such as an uninterruptible electric power supply system using the battery or the like, or a battery apparatus of a motor for an electric bicycle or an electric vehicle.    ADVANTAGE - The ripple in voltage and current can be reduced to improve the detecting accuracy and the reliability of the voltage and the current, and temperature rise of the batteries can be reduced to improve the safety, the lifetime and the performance of the batteries. The battery apparatus can be made light in weight, small in size, low in cost and high in safety. A large current and high voltage battery apparatus can be made.