Abstract: In a method of efficiently managing and extending life of a battery bank, it is identified whether lifespan characteristic value of a battery bank unit reaches a predetermined threshold value of lifespan extension, by monitoring a lifespan characteristic value of an individual battery bank unit. While the other battery bank units normally supply power, a high-frequency electric pulse is applied to an identified battery bank unit through a DC/DC converter. Thus, materials preventing an electrochemical reaction accumulated on an electrode are removed.

Abstract: In a method of efficiently managing and extending life of a battery bank, it is identified whether lifespan characteristic value of a battery bank unit reaches a predetermined threshold value of lifespan extension, by monitoring a lifespan characteristic value of an individual battery bank unit. While the other battery bank units normally supply power, a high-frequency electric pulse is applied to an identified battery bank unit through a DC/DC converter. Thus, materials preventing an electrochemical reaction accumulated on an electrode are removed.

Abstract: Provided is a multifunctional power-conversion system which controls active power and reactive power by employing distributed power. With respect to the multifunctional power-conversion system according to the present invention, an auxiliary power device, using wind power and/or solar power, is connected to a power system; and a distributed power device, such as a battery, for temporarily storing power is connected thereto while being connected to the auxiliary power device. A power converter connects a high-capacity power supply source, such as a periodic power source or a main power supply source, to the system. Therefore, the electricity consumption status is checked such that the control of active power and reactive power is enabled.