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Over-discharge protection control system for lithium ion storage battery and over-discharge protection method thereof

An over-discharge protection and control system technology, applied in emergency protection circuit devices, electrical components, etc., to prevent over-discharge, improve reliability and safety, and prevent over-discharge protection from failing.

Inactive Publication Date: 2012-12-26
SHANGHAI INST OF SPACE POWER SOURCES
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Over-discharge protection control system for lithium ion storage battery and over-discharge protection method thereof
  • Over-discharge protection control system for lithium ion storage battery and over-discharge protection method thereof
  • Over-discharge protection control system for lithium ion storage battery and over-discharge protection method thereof

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Embodiment Construction

[0051] Specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0052] Such as figure 1 As shown, the present invention discloses a lithium-ion battery over-discharge protection control system applied to a lunar probe power supply system. The lithium-ion battery over-discharge protection control system includes a series-connected lithium-ion battery pack 2, a discharge switch 7, a peak load Control switch 8 and peak load 3, the power system applied to the lunar probe also includes minimum platform load 4, over-discharge enabling switch 6, integrated electronic subsystem 1 and over-discharge protection circuit 5.

[0053] The lithium-ion battery pack 2 includes a number of battery cells connected in series or in parallel. In this real-time example, the lithium-ion battery pack 2 is composed of 14 lithium-ion battery cells 2 connected in series and 7 in series.

[0054] The minimum platform load 4 is connecte...

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Abstract

The invention discloses an over-discharge protection method for an over-discharge protection control system for a lithium ion storage battery, which is applied to a lunar probe power supply system. The over-discharge protection method comprises the following steps: a comprehensive electronic subsystem detects the voltage of a storage battery monomer, and switches a peak load off when discharge or fault of the storage battery monomer is detected; the comprehensive electronic subsystem continually detects the voltage of the storage battery monomer, judges whether the storage battery monomer is in a monomer over-discharge state or a monomer fault state, performs over-discharge protection on the storage battery monomer if the storage battery monomer is in the monomer over-discharge state, and clears the fault of the storage battery monomer if the storage battery monomer is in the monomer fault state; and during over-discharge protection for the storage battery monomer, a discharge switch is switched off, and an over-discharge protection circuit performs over-discharge protection on a hardware storage battery pack. The invention provides a storage battery monomer protection way and a storage battery pack protection way, a software control way is adopted during monomer over-discharge protection, a hardware control way is adopted during pack over-discharge protection, and two types of protection serve as backups for each other, so that the reliability and safety of a satellite power supply system are enhanced.

Description

technical field [0001] The invention relates to a battery over-discharge protection method applicable to the technical field of aerospace power supply control, in particular to a lithium-ion storage battery over-discharge protection control system and an over-discharge protection method applied to a lunar probe power supply system. Background technique [0002] Lithium-ion batteries refer to secondary batteries that use Li+ intercalation compounds as positive and negative active materials. Compared with traditional zinc-silver batteries, cadmium-nickel batteries, and nickel-hydrogen batteries, lithium-ion batteries have high specific energy, high operating voltage, wide application temperature range, low self-discharge rate, long cycle life, and good safety. Therefore, in the field of aerospace, lithium-ion batteries have become the third-generation satellite energy storage power supply to replace the current mainstream applications of nickel-cadmium and nickel-hydrogen batt...

Claims

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Application Information

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IPC IPC(8): H02H7/18
Inventor 周健金波刘勇张婷婷许峰钱斌
Owner SHANGHAI INST OF SPACE POWER SOURCES
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