Testing method, device and system for performance curve of hydrogen storage alloy

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] The embodiment of the present invention relates to a material characteristic testing technology, in particular to a method, device and system for testing the performance curve of a hydrogen storage alloy. Background technique

[0002] Hydrogen storage alloy is a kind of energy conversion functional material. Due to its reversible hydrogen absorption and desorption characteristics and accompanying thermal effects, hydrogen storage alloys can be used in large batteries, refrigeration or heating equipment materials, etc.

[0003] The pressure-component 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, through the PCT curve, you can know how much hydrogen (wt.%) can be contained in the hydride and the decomposition pressure value at any temperature, and after obtaining the hydrogen release eq...

Examples

Embodiment 1

[0030] figure 2 This is a flow chart of the method for testing the performance curve of the hydrogen storage alloy provided in the first embodiment of the present invention. This embodiment may be suitable for testing the PCT curve of a hydrogen storage alloy with a low low-temperature hydrogen release platform and a small high-temperature hydrogen absorption capacity. The method can be executed by a testing device for the performance curve of the hydrogen storage alloy, and specifically includes the following steps:

[0031] Step 110: Perform activation treatment on the hydrogen storage alloy sample in the test system.

[0032] Among them, the activation treatment process includes vacuuming the hydrogen storage alloy sample under high temperature conditions. Then, the test system is filled with hydrogen until the set pressure value is reached, so that the hydrogen storage alloy sample is in contact with the hydrogen for a long time to fully react. After the hydrogen storage allo...

Embodiment 2

[0058] On the basis of the above technical solutions, adopt image 3 The hydrogen absorption and desorption pressure-component isotherm curve test instrument shown in 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 the mass percentage of the corresponding component in the hydrogen storage alloy composition) as an example, to specify that the hydrogen storage alloy sample is obtained at the second set temperature The pressure-component isotherm method of the hydrogen release stage.

[0059] 1) Sample loading. The test personnel weighed about 1-3g hydrogen storage alloy samples and put them into the sample tank. Before loading hydrogen storage alloy samples, the inside of the sample tank must be clean and dry.

[0060] 2) Leak detection. Control the opening of the vacuum valve, the main valve and the sample valve in turn, and perform vacuumin...

example 1

[0072] Example 1: Hydrogen storage alloy sample (100 mesh powder) is prepared with 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. The hydrogen absorption and desorption PCT curve test of 40Ti-40V-10Mn-10Cr hydrogen storage alloy was carried out at 298K, and the hydrogen absorption and desorption PCT curve ( figure 1 Shown). And the hydrogen release PCT curve test of 40Ti-40V-10Mn-10Cr hydrogen storage alloy at 373K, and the hydrogen release PCT curve at 373K ( Figure 4 Shown). Observed figure 1 It can be seen from the PCT curve of 40Ti-40V-10Mn-10Cr that the PCT curve of the hydrogen storage alloy in the hydrogen absorption and desorption stages of 298K is not complete, and no plateau is observed. And by Figure 4 It can be seen from the PCT curve of 40Ti-40V-10Mn-10Cr that the PCT curve for hydrogen desorpti...

Technical field

[0001] The embodiment of the present invention relates to a material characteristic testing technology, in particular to a method, device and system for testing the performance curve of a hydrogen storage alloy. Background technique

[0002] Hydrogen storage alloy is a kind of energy conversion functional material. Due to its reversible hydrogen absorption and desorption characteristics and accompanying thermal effects, hydrogen storage alloys can be used in large batteries, refrigeration or heating equipment materials, etc.

[0003] The pressure-component 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, through the PCT curve, you can know how much hydrogen (wt.%) can be contained in the hydride and the decomposition pressure value at any temperature, and after obtaining the hydrogen release eq...

Examples

Embodiment 1

[0030] figure 2 This is a flow chart of the method for testing the performance curve of the hydrogen storage alloy provided in the first embodiment of the present invention. This embodiment may be suitable for testing the PCT curve of a hydrogen storage alloy with a low low-temperature hydrogen release platform and a small high-temperature hydrogen absorption capacity. The method can be executed by a testing device for the performance curve of the hydrogen storage alloy, and specifically includes the following steps:

[0031] Step 110: Perform activation treatment on the hydrogen storage alloy sample in the test system.

[0032] Among them, the activation treatment process includes vacuuming the hydrogen storage alloy sample under high temperature conditions. Then, the test system is filled with hydrogen until the set pressure value is reached, so that the hydrogen storage alloy sample is in contact with the hydrogen for a long time to fully react. After the hydrogen storage allo...

Embodiment 2

[0058] On the basis of the above technical solutions, adopt image 3 The hydrogen absorption and desorption pressure-component isotherm curve test instrument shown in 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 the mass percentage of the corresponding component in the hydrogen storage alloy composition) as an example, to specify that the hydrogen storage alloy sample is obtained at the second set temperature The pressure-component isotherm method of the hydrogen release stage.

[0059] 1) Sample loading. The test personnel weighed about 1-3g hydrogen storage alloy samples and put them into the sample tank. Before loading hydrogen storage alloy samples, the inside of the sample tank must be clean and dry.

[0060] 2) Leak detection. Control the opening of the vacuum valve, the main valve and the sample valve in turn, and perform vacuumin...

example 1

[0072] Example 1: Hydrogen storage alloy sample (100 mesh powder) is prepared with 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. The hydrogen absorption and desorption PCT curve test of 40Ti-40V-10Mn-10Cr hydrogen storage alloy was carried out at 298K, and the hydrogen absorption and desorption PCT curve ( figure 1 Shown). And the hydrogen release PCT curve test of 40Ti-40V-10Mn-10Cr hydrogen storage alloy at 373K, and the hydrogen release PCT curve at 373K ( Figure 4 Shown). Observed figure 1 It can be seen from the PCT curve of 40Ti-40V-10Mn-10Cr that the PCT curve of the hydrogen storage alloy in the hydrogen absorption and desorption stages of 298K is not complete, and no plateau is observed. And by Figure 4 It can be seen from the PCT curve of 40Ti-40V-10Mn-10Cr that the PCT curve for hydrogen desorpti...

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