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A low-voltage high-efficiency power supply system for micro-nano satellites

A technology of power supply system and micro-nano satellite, which is applied in the field of micro-nano satellite power supply system, can solve the problems of increasing the volume and weight of devices, increasing the line loss of power transmission link, and unfavorable miniaturization of equipment, so as to reduce the volume and weight and reduce the pressure , The effect of strong fault isolation capability

Active Publication Date: 2018-08-21
AEROSPACE DONGFANGHONG SATELLITE
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AI Technical Summary

Problems solved by technology

For a micro-nano satellite of 1-100kg, its power consumption is generally 5-100W. If the 28V primary busbar design of the small satellite is used, the volume and weight of the device will increase when the withstand voltage level of the device is increased, which is not conducive to the miniaturization of the equipment. ; In addition, if the bus voltage is too low, it will increase the line loss of the power transmission link

Method used

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  • A low-voltage high-efficiency power supply system for micro-nano satellites
  • A low-voltage high-efficiency power supply system for micro-nano satellites
  • A low-voltage high-efficiency power supply system for micro-nano satellites

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Embodiment approach

[0017] The power system consists of three parts, namely solar cell array, battery pack and voltage-limiting shunt regulation circuit. Make full use of the small voltage fluctuation of lithium ion and the constant current characteristics of the solar cell array, choose not to adjust the busbar, and use the battery port voltage as the bus voltage of the whole star, combined with the lightweight design concept, choose lithium ion battery for the battery, and three junctions for the solar cell array Gallium arsenide cell. Such as figure 1 shown.

[0018] The output energy of the solar cell array is directly supplied to the lithium-ion battery pack after being isolated by diodes, and the battery pack is directly connected to the busbar. During the Earth Shadow period, the battery pack is used to provide energy for the entire star. During the light period, the output energy of the solar cell array is first directly supplied to the load. Each solar panel is divided into two solar...

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Abstract

The invention discloses a micro / nano-satellite low-voltage efficient power supply system. A 12V low-voltage unregulated bus topological structure is adopted, a lithium ion storage battery pack is used as an energy storage device, and a shunt regulating manner is adopted to realize power regulation and voltage stabilization as well as constant current-constant voltage charging for the storage battery pack. Solar battery packs are in grouping connection, and correspond to direct power supply and shunt power supply respectively; fault isolation is designed in a shunt circuit, and when the system judges that the shunt circuit breaks down, a group of switches backup for the shunt circuit respectively realize bus stabilization and a constant-voltage charging function for the storage battery pack; satellite power-up begins to work when a satellite power supply interface can realize satellite-socket separation; and charging management and overcharging protection can be carried out in different life periods. The power supply system disclosed by the invention has the characteristics of low power consumption, small size and light weight, and can be applied to micro / nano-satellite power supply systems with the whole-satellite load power consumption of 5 to 100 W.

Description

technical field [0001] The invention relates to a micro-nano satellite low-voltage high-efficiency power supply system, which can be applied to the micro-nano satellite power supply system. Background technique [0002] Satellites are divided by weight and are generally divided into large satellites, small satellites, microsatellites, nano-satellites and pico-satellites. Among them, those weighing more than 1000kg are large satellites, those weighing between 100kg and 1000kg are small satellites, those weighing between 10kg and 100kg are microsatellites, those weighing between 1kg and 10kg are nanosatellites, and those weighing less than 1kg are picosatellites. The power consumption of a large satellite is generally above 1500W, and it uses a primary bus with a rating of 42V, 50V or 100V for power supply. The power consumption of the small satellite is less than 1500W. The power system generally adopts a primary bus with a rated value of 28V. The secondary power generally a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/35H02J7/00
CPCH02J7/0029H02J7/0068H02J7/007H02J7/35Y02E10/56
Inventor 巩巍鄢婉娟刘元默李龙飞苏蛟
Owner AEROSPACE DONGFANGHONG SATELLITE
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