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Evaluation method and evaluation system for on-orbit real-time capacity of spacecraft storage battery pack

A battery pack, real-time capacity technology, applied in the measurement of electrical variables, instruments, measurement of electricity and other directions, can solve problems such as the inability to accurately evaluate the available capacity, and achieve the effect of strong applicability

Inactive Publication Date: 2020-07-31
SHANGHAI INST OF SPACE POWER SOURCES
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Problems solved by technology

Since the voltage law does not take temperature, charge and discharge current and other factors into quantitative overall consideration, it is impossible to accurately evaluate the remaining available capacity of the lithium-ion battery pack at a fixed temperature and charge and discharge rate

Method used

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  • Evaluation method and evaluation system for on-orbit real-time capacity of spacecraft storage battery pack
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  • Evaluation method and evaluation system for on-orbit real-time capacity of spacecraft storage battery pack

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Embodiment Construction

[0033] based on the following Figure 1 to Figure 4 , specifically describe the preferred embodiment of the present invention.

[0034] Such as figure 1 As shown, the present invention provides a ground evaluation method of the on-orbit real-time capacity of a spacecraft lithium-ion battery pack, comprising the following steps:

[0035] Step S1, use the same batch of lithium-ion battery packs as the positive lithium-ion battery packs to carry out a thorough test at different temperatures and different charge-discharge rates, and establish a reference capacity matrix for the same batch of lithium-ion battery packs; Lithium-ion battery packs of the same batch can eliminate errors caused by differences between batches;

[0036] Step S2, read the real-time temperature, pack voltage, and charge and discharge current telemetry data of the positive lithium-ion battery pack on-rail status through telemetry;

[0037] Step S3. According to the different on-orbit states of the positiv...

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Abstract

The invention discloses an evaluation method and an evaluation system for on-orbit real-time capacity of a spacecraft storage battery pack. A lithium ion storage battery pack in the same batch as a positive sample lithium ion storage battery pack undergoes a groping test at different temperatures and different charge-discharge rates; a reference capacity matrix of the same batch of lithium ion storage battery packs is established; real-time temperature, pack voltage and charge-discharge current telemetry data of the on-orbit state of the positive sample lithium ion storage battery pack are read through telemetry; and according to different on-orbit states of the positive sample lithium ion storage battery pack, the reference capacity matrix of the lithium ion storage battery packs of the same batch are inquired according to the on-orbit real-time temperature, the pack voltage and the charge-discharge current telemetry data of the positive sample lithium ion storage battery pack to obtain the on-orbit real-time capacity of the positive sample lithium ion storage battery pack. The on-orbit available capacity of the lithium ion storage battery pack can be determined in real time according to the working temperature and the charge-discharge current state of the lithium ion storage battery pack, and effective reference and basis are provided for making a charge-discharge control strategy of the lithium ion storage battery pack in a subsequent task stage.

Description

technical field [0001] The invention relates to a ground evaluation method and an evaluation system for the on-orbit real-time capacity of a spacecraft lithium-ion battery pack. Background technique [0002] With the increasingly complex on-orbit flight missions of spacecraft, especially for deep space probes, which often have the characteristics of tight energy margins and large on-orbit discharge depths, as a commonly used key energy storage device, the lithium-ion battery pack’s Correspondingly, higher requirements are put forward for the accuracy of real-time charging and discharging capacity management. [0003] At present, the commonly used methods for on-orbit real-time capacity assessment of lithium-ion battery packs mainly include current integration method and voltage method. The current integration method will produce obvious cumulative errors when the lithium-ion battery pack is not fully charged for many turns. Since the voltage law does not take temperature, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/3842
CPCG01R31/3842
Inventor 蔡晓东夏宁杜青徐泽锋王晓锐杨祎丁一宁
Owner SHANGHAI INST OF SPACE POWER SOURCES
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