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A kind of energy type sodium-sulfur battery life detection method

A sodium-sulfur battery and detection method technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of overcharging and overdischarging of sodium-sulfur batteries, and reduce the performance of sodium-sulfur batteries, so as to improve performance and avoid over-charging. Charging or over-discharging, the effect of ensuring safe operation

Active Publication Date: 2019-03-26
上海电气企业发展有限公司
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Problems solved by technology

[0003] In these applications, it is necessary to accurately detect the life of the sodium-sulfur battery, otherwise it may lead to overcharging or over-discharging of the sodium-sulfur battery, threatening the safe operation of the sodium-sulfur battery and reducing the performance of the sodium-sulfur battery

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  • A kind of energy type sodium-sulfur battery life detection method

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Embodiment Construction

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, its specific implementation will be described in detail below in conjunction with the accompanying drawings:

[0025] see figure 1 , the relationship between the capacity of energy-type sodium-sulfur battery and the open-circuit voltage of energy-type sodium-sulfur battery, Q n is the absolute capacity, Q 0 is the initial unusable capacity, Q x is the absolute depth of discharge, Q 1 -Q 0 is the used capacity, Q n -Q 1 is the initial reserved capacity, Q n -Q x is the available capacity, 1≤x≤n. As the sodium-sulfur battery is used, the unusable capacity will gradually increase, and the available capacity will gradually decrease under the condition that the used capacity remains unchanged. When the available capacity is equal to 0, the life of the sodium-sulfur battery will end and it will be out of service.

[0026] The parameters of a certain type ...

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Abstract

The invention discloses a method for detecting service life of an energy type sodium-sulfur battery. The method is characterized in that the service life of the energy type sodium-sulfur battery is detected by the ratio of available capacity and initial reserving capacity, so that the service life of the energy type sodium-sulfur battery in different application occasions can be detected. The method is suitable for single sodium-sulfur batteries, sodium-sulfur battery packs or sodium-sulfur battery modules, sodium-sulfur battery power stations or sodium-sulfur battery energy storage systems. The method has the advantages that the service life of the sodium-sulfur battery can be accurately detected, the sodium-sulfur battery can be used in the charging and discharging ranges, the overcharging or overdischarging of the sodium-sulfur battery can be avoided, the safety running of the sodium-sulfur battery is guaranteed, and the property of the sodium-sulfur battery is improved.

Description

technical field [0001] The invention relates to a life detection method of an energy type sodium-sulfur battery. Background technique [0002] Sodium-sulfur batteries are widely used in peak shaving, emergency power supply, wind power and other renewable energy sources, as well as improving power quality. According to different applications, sodium-sulfur batteries can be divided into energy-type sodium-sulfur batteries and power-type sodium-sulfur batteries. For example, energy-type sodium-sulfur batteries are usually used in the stable output applications of renewable energy such as peak shaving, solar energy, and wind energy, and power-type sodium-sulfur batteries are usually used in emergency power applications. [0003] In these applications, it is necessary to accurately detect the life of the sodium-sulfur battery, otherwise it may lead to overcharging or over-discharging of the sodium-sulfur battery, threatening the safe operation of the sodium-sulfur battery and re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/385G01R31/392G01R31/378
CPCG01R31/392
Inventor 鲍剑明龚明光孙贤书刘宇
Owner 上海电气企业发展有限公司