The lithium-ion secondary batteries have been widely used for the space programs, today. Among them, REIMEI was one of the first satellites using lithium-ion secondary battery. In 2005, the satellite was launched, and injected into the low earth p...
The satellite borne batteries should be composed by safe materials if we don't want to have a risk of explosion caused by batteries. Therefore, we focused on two safe batteries. One is a lithium-ion battery with an ionic liquid electrolyte, and th...
For planetary exploration missions using a lander, autonomous pinpoint landing capability whose precision is less than 100-meter must be needed in order to land on limited investigation areas. This capability cannot be realized with an inertial na...
The AC impedance of the LiFePO4 type lithium-ion secondary cells was initially measured, and charge/discharge cycling was constantly repeated at 10, 23, and 45 degrees C to understand their electrochemical characteristics. The decrease in the impe...