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Method, device and system for testing performance curve of hydrogen storage alloy

A technology of hydrogen storage alloy and testing system, which is applied in measuring devices, testing metals, instruments, etc., and can solve problems such as limited PCT curve information

Active Publication Date: 2018-11-13
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, the PCT test in the hydrogen absorption and desorption stage in the above method is carried out at the same temperature. For hydrogen storage alloys with a low hydrogen desorption platform at low temperature and a small hydrogen absorption capacity at high temperature, it is difficult to obtain relatively complete hydrogen by controlling the appropriate temperature. The hydrogen desorption curve (platform), resulting in very limited information that the PCT curve can provide

Method used

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  • Method, device and system for testing performance curve of hydrogen storage alloy
  • Method, device and system for testing performance curve of hydrogen storage alloy
  • Method, device and system for testing performance curve of hydrogen storage alloy

Examples

Experimental program
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Embodiment 1

[0030] figure 2 It is a flow chart of the test method for the performance curve of the hydrogen storage alloy provided in Embodiment 1 of the present invention. This embodiment is applicable to the case of testing the PCT curve of the hydrogen storage alloy with a lower low-temperature hydrogen desorption platform and a smaller high-temperature hydrogen absorption capacity. , this method can be carried out by the testing device of the performance curve of hydrogen storage alloy, specifically comprises the following steps:

[0031] Step 110, perform activation treatment on the hydrogen storage alloy sample in the testing system.

[0032] Wherein, the activation treatment process includes vacuumizing the hydrogen storage alloy sample under high temperature conditions. Then, fill the test system with hydrogen gas until the set pressure value, so that the hydrogen storage alloy sample is in contact with the hydrogen gas for a long time to fully react. After the hydrogen storage...

Embodiment 2

[0059] On the basis of the above technical solutions, the image 3 For the hydrogen absorption and desorption pressure-component isotherm curve test instrument shown, the first set temperature is 298K, the second set temperature is 373K, and the hydrogen storage alloy sample is (40-x)Ti-40V-10Mn-10Cr- xSc (x=0,5,10,15, that is, the value of x indicates that the corresponding component accounts for the mass percentage of the hydrogen storage alloy composition) as an example, specifically explaining that the hydrogen storage alloy sample obtained at the second set temperature The pressure-composition isotherm method of the dehydrogenation stage.

[0060] 1) Sample loading. The test personnel weighed about 1-3g of the hydrogen storage alloy sample and put it into the sample tank. Before filling the hydrogen storage alloy sample, the inside of the sample tank must be clean and dry.

[0061] 2) Leak detection. Control the opening of the vacuum valve, the main valve and the samp...

example 1

[0073] Example 1: The hydrogen storage alloy sample (100 mesh powder) is prepared by using titanium (Ti), vanadium (V), manganese (Mn) and chromium (Cr), and the mass percentage of each component in the hydrogen storage alloy sample is Ti:40 %, V: 40%, Mn: 10% and Cr: 10%, expressed as 40Ti-40V-10Mn-10Cr. Under 298K, carry out the hydrogen absorption and desorption PCT curve test of 40Ti-40V-10Mn-10Cr hydrogen storage alloy, obtain the hydrogen absorption and desorption PCT curve under 298K ( figure 1 shown). And carry out the dehydrogenation PCT curve test of 40Ti-40V-10Mn-10Cr hydrogen storage alloy under 373K, obtain the dehydrogenation PCT curve under 373K ( Figure 4 shown). observefigure 1 From the PCT curve of 40Ti-40V-10Mn-10Cr, it can be seen that the PCT curve of the hydrogen storage alloy is not complete in the hydrogen absorption and hydrogen release stages at 298K, and no platform can be observed. And by Figure 4 From the PCT curve of 40Ti-40V-10Mn-10Cr, it c...

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Abstract

The invention discloses a testing method, device and system for a performance curve of hydrogen storage alloy. The method comprises the steps that activating treatment is conducted on a hydrogen storage alloy sample contained in a testing system; the temperature of the hydrogen storage alloy sample is adjusted to a first set temperature, and hydrogen is introduced into the testing system until the testing system reaches the set pressure, so that the hydrogen absorption quantity of the hydrogen storage alloy sample at the first set temperature reaches saturation; the temperature of the hydrogen storage alloy sample is adjusted to a second set temperature, and hydrogen storage change quantity of the hydrogen storage alloy sample is determined in real time in the interval from the end of the hydrogen absorption stage at the first set temperature to the start of the hydrogen desorption stage at the second set temperature; the initial hydrogen storage quantity of the hydrogen storage alloy sample in the hydrogen desorption stage is determined according to the saturated hydrogen absorption quantity of the hydrogen storage alloy sample and the hydrogen storage change quantity, hydrogen in the testing system is gradually decreased according to a set rule, a pressure-component isothermal curve of the hydrogen storage alloy in the hydrogen desorption stage is determined, and a more complete PCT curve and platform in the hydrogen desorption stage are provided.

Description

technical field [0001] Embodiments of the present invention relate to material property testing technology, and in particular to a method, device and system for testing performance curves of hydrogen storage alloys. Background technique [0002] Hydrogen storage alloy is a kind of energy conversion functional material. Due to their reversible hydrogen absorption and desorption characteristics and accompanying thermal effects, hydrogen storage alloys can be applied to large batteries, refrigeration or heating equipment materials, etc. [0003] The pressure-composition isotherm curve (PCT curve for short) is an important characteristic curve of hydrogen storage materials, which can reflect many important characteristics of hydrogen storage alloys in engineering applications. For example, the PCT curve can be used to understand how much hydrogen (wt.%) can be contained in the hydride and the decomposition pressure value at any temperature, and after obtaining the hydrogen deso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/20
CPCG01N33/2025
Inventor 朱劲波史正良
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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