Lunar Rover's Systems:
Extended duration lunar missions require survival of lunar night,
which approaches temperatures of -180C. The utility of night survival
means another 14 earth days of mission. Critical to operation upon
revival is the battery. Common batteries use an aqueous electrolyte
which ruptures cell chemistry when subjected to cryogenic temperatures.
Development of a lithium-iron-phosphate battery pack enables revival
after cryogenic freeze.
The prototype in this video shows a micro-controller to initiate wakeup
of a flight computer upon temperature trigger, which is sensed by the
micro-controller. This function is critical for boot-up of systems that endure
lunar night. This system is more fully described in the video.
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