Separation self power on and battery protection method applied to micro/nano satellite

Abstract

The invention provides a separation self power on and battery protection method applied to a micro / nano satellite. The satellite can be kept in a power-off state during a satellite launching process, and the energy loss of the battery is reduced, and after the satellite and a loader are separated, a separation switch is on, a battery pack is automatically connected onto a power supply bus, and power is provided for the satellite load. The separation switch only controls the gate of an MOS transistor as a discharging switch, the passing current is small, and a derating design does not need to be considered; due to a necessary redundancy design, a risk that connection between the battery pack and the power supply bus is broken due to failure of the separation switch during the in-orbit operation period of the satellite can be prevented. Over charging and over discharging protection functions are provided, the battery pack can only perform charging but not discharging after over discharging protection happens to the satellite, and after the voltage rises to a certain value, the battery can be reconnected onto the power supply bus for providing power for the load through software control. The method of the invention is simple and reliable, self power on work after the satellite and the loader are separated can be realized, and energy loss in the transmission section is reduced.

Description

technical field [0001] The invention relates to the technical field of micro-nano satellite control, in particular to a separate self-power-on and battery protection method suitable for micro-nano satellites. Background technique [0002] Micro-nano satellites have the characteristics of low cost and short development cycle, and have been more and more researched and applied all over the world. Since the capacity of the battery used is generally very small, and the time from launch to orbit of the satellite is fixed, if the design method of the traditional satellite is adopted—the satellite is in the working state during launch, the discharge depth of the battery may decrease after the satellite is separated from the carrier. Reaching more than 70%, there is a risk of satellite power failure or even loss. Therefore, it is necessary to design a circuit so that the satellite is in a power-off state during the launch phase, and is automatically powered on after being separated...

AI Technical Summary

Problems solved by technology

Because the capacity of the battery used is generally very small, and the time from launch to orbit of the satellite is fixed, if the design method of the traditional satellite is adopted—the satellite is in the working state during launch, the discharge depth of the battery may decrease after the satellite is separated from the carrier. Reaching more than 70%, there is a risk of satellite power failure or even loss

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