On-orbit management method for lithium-ion battery packs suitable for sun-synchronous morning and evening orbit satellites

Abstract

The invention discloses an on-orbit management method suitable for a sun-synchronous morning and evening orbit satellite lithium-ion storage battery pack. The on-orbit management of the lithium-ion storage battery pack is determined according to the orbit calculation independently completed by the on-board computer, satellite three-axis attitude measurement, and sun azimuth judgment. mode, the on-orbit management mode includes the long-light period management mode, the earth shadow period management mode and the emergency state management mode, corresponding to the lithium-ion battery pack management strategies in the three on-orbit states of sun-synchronous morning and evening orbit satellites. The system of the invention solves the on-orbit self-management problem of the lithium-ion battery under complex working conditions such as long-term shelving of the lithium-ion battery pack during the long-light period of the sun-synchronous morning and evening orbit satellite, frequent charging and discharging of the battery pack during the shadow period, and deep discharge and rapid charging in an emergency state. Thus, the long-life, independent and reliable on-orbit operation of the sun-synchronous morning and evening orbit satellite power supply system is ensured.

Description

technical field

[0001] The invention relates to the field of on-orbit management of spacecraft power supplies, in particular to an on-orbit management method suitable for lithium-ion battery packs of sun-synchronous morning and evening orbit satellites. Background technique

[0002] In recent years, due to the high mass specific energy and high volume specific energy of lithium-ion batteries, they have been widely used as energy storage components on spacecraft such as satellites. Its overcharge, overdischarge and other reliability and safety measures have been designed very well, but there is not enough experience and models for its on-orbit use and management.

[0003] According to the requirements of relevant specifications for lithium-ion battery packs, lithium-ion battery packs should not be placed on hold for a long time. When they must be stored for a long time, they must be in a state of charge of 70% to 80% and a temperature of 0 to 5°C. During normal charging and d...

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