Device and method for testing permeability of subcomponent of breathable pressure release valve

Abstract

The invention discloses a device and a method for testing permeability of a breathable pressure release valve subcomponent, and the device comprises a test sample piece and the breathable pressure release valve subcomponent. The test method comprises the following steps: preparing a test sample piece through heat-sealing compounding, and checking overlapping positions of through holes of each component; fixing the ventilation pressure release valve sub-component on the test sample piece through hot-pressing compounding, and checking the overlapping position of the through holes of each component; and the test sample piece and the ventilation pressure release valve sub-component are arranged in a test equipment tool jig to carry out a permeability test. According to the invention, the ventilation pressure release valve sub-component is fixed on the test sample piece through heat-seal compounding, then the test sample piece is installed on the fixing jig of the test device, the test device can be adapted to the ventilation pressure release valve sub-component with small size and any shape to carry out ventilation and water permeability performance test, and after the test is finished, the tested sub-component is taken down through a heating mode, so that the test efficiency is improved. The whole test process is simple to operate, and the test cost is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of air-permeable pressure relief valve testing devices, and in particular to an air-permeable pressure relief valve sub-component permeability testing device and a testing method. Background Art

[0002] The breathable pressure relief valve is mainly used for the top cover of batteries (including lithium-ion batteries, sodium-ion batteries, etc.). Its main function is to discharge the gas generated by the side reactions during the battery charging and discharging process and prevent other liquids from passing through, thereby reducing the internal pressure of the battery cell, improving the battery cell performance and battery cell life, and reducing the cost of mechanical parts. The mainstream pressure relief valve on the market is the explosion-proof valve, that is, when the pressure inside the battery cell reaches the set threshold, the notch position of the explosion-proof valve will be broken by the pressure, and then the battery cell will be depressurized. However, the battery cell cannot be used after the pressure is released and can only be scrapped; the main function of the breathable pressure relief valve is to discharge the gas inside the battery cell, thereby achieving the purpose of depressurizing the battery cell. Under normal cyclic use conditions, a certain amount of gas (including CO2 and other gases) will be produced inside the battery cell. When there is a positive pressure difference between the internal pressure and the external environmental pressure, the gas inside the battery cell will be gradually discharged, thereby keeping the interior of the battery cell in a low internal pressure state at all times. At the same time, since it is necessary to ensure that water vapor and air in the external environment cannot pass through the breathable pressure relief valve during the entire service life of the battery cell, the breathable and waterproof performance of the breathable pressure relief valve is tested.

[0003] The existing test objects for air permeability and water permeability are mainly some functional membrane materials. During the test, the functional membrane materials are first sampled (i.e., the functional membrane materials are cut into a shape that is consistent with the size of the test tooling), and then installed on the corresponding tooling fixture. After setting the test conditions, the test instrument is started to test the air permeability and water permeability. However, this method can only test the air permeability and water permeability of functional membrane materials, and for the air permeable pressure relief valve sub-component, because its size is much smaller than the tooling fixture of the test equipment, it cannot be sealed on the tooling fixture. In addition, because the functional membrane material side of the air permeable pressure relief valve sub-component must face the high pressure chamber side, and the metal side must face the low pressure chamber side, the test results cannot correctly evaluate the air permeability and water permeability of the air permeable pressure relief valve sub-component. Summary of the invention

[0004] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0005] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose a permeability testing device and a testing method for a sub-component of a breathable pressure relief valve.

[0006] In order to achieve the above-mentioned object, in a first aspect, the present invention provides a permeability test device for a gas permeable pressure relief valve sub-component, comprising: a test sample and a gas permeable pressure relief valve sub-component;

[0007] The test sample includes a test substrate, a test metal part and a first adhesive film material, the air-permeable pressure relief valve subcomponent includes a base metal part, a supporting backing, a second adhesive film material and a functional film material, and the air-permeable pressure relief valve subcomponent is fixed on the test sample by heat-sealing composite.

[0008] In some embodiments, the first adhesive film material is provided with two layers, the test substrate and the test metal piece are heat-sealed and fixed together by the first adhesive film material, and the test metal piece and the base metal piece are heat-sealed and fixed together by the first adhesive film material.

[0009] In some embodiments, a first through hole is opened in the middle of the test substrate, a second through hole is opened in the corresponding position in the middle of the test metal part, and a third through hole is opened in the corresponding position of the first adhesive film material, and the first through hole, the second through hole and the third through hole are of the same size.

[0010] In some of the embodiments, the test metal piece is provided with a first sink groove, and the air-permeable pressure relief valve subcomponent is arranged in the middle of the first sink groove.

[0011] In some embodiments, the base metal part and the functional film material are fixed by heat sealing with the second adhesive film material.

[0012] In some of the embodiments, the base metal member is provided with a second recessed groove, and the support backing is embedded in the second recessed groove.

[0013] In some embodiments, the base metal part is provided with a fourth through hole, the second adhesive film material is provided with a fifth through hole at a corresponding position, and the fifth through hole is consistent with the second sink groove of the base metal part in size. In a second aspect, the present invention further provides a permeability test method for a sub-component of a gas permeable pressure relief valve, which is performed by the permeability test device for sub-components of a gas permeable pressure relief valve as described in the first aspect, and the test method steps include:

[0014] S100, preparing a test sample by heat sealing and compounding, and checking the overlapping positions of the through holes of each component;

[0015] S200, fix the breathable pressure relief valve sub-component on the test sample by hot pressing and checking the overlapping position of the through holes of each component;

[0016] S300: Place the test sample and the breathable pressure relief valve sub-assembly into the test equipment fixture to perform a permeability test.

[0017] In some embodiments, the step S100 includes:

[0018] S101, bonding the first adhesive film material to the end surfaces of both sides of the test metal piece by hot pressing and laminating, and checking whether the through-hole positions of the test metal piece and the first adhesive film material overlap;

[0019] S102, bonding the test substrate to one end surface of the first adhesive film material by hot pressing, and checking whether the through-hole positions of the test substrate and the first adhesive film material overlap.

[0020] In some embodiments, the step S300 includes:

[0021] S301, the functional membrane material faces the high pressure chamber or the high concentration chamber, and the test sample and the breathable pressure relief valve sub-component are fixed by the test equipment fixture;

[0022] S302, setting test parameters through the test equipment test software to perform an air permeability test or a water permeability test;

[0023] S303, removing the breathable pressure relief valve sub-component by heating, and heat-sealing and compounding other breathable pressure relief valve sub-components for testing.

[0024] The present invention has the following beneficial effects:

[0025] 1. The present invention fixes the air-permeable pressure relief valve sub-component on the test sample by heat-sealing compound, and then installs it on the fixing fixture of the test equipment. It can adapt to the air-permeable pressure relief valve sub-component of small size and arbitrary shape to test the air-permeability and water-permeability performance. After the test is completed, the tested sub-component is removed by heating, and then other sub-components to be tested are heat-sealed to continue the test. The whole test process is simple to operate, and the test cost is effectively reduced.

[0026] 2. The present invention, the testing device and the testing method are suitable for testing the air permeability and water permeability performance of the air-permeable pressure relief valve sub-components after reliability testing, including after a 110°C high-temperature baking test of the air-permeable pressure relief valve, or after a -40°C to 85°C high and low temperature cycle test, or after an electrolyte Dipping reliability test, as well as after an explosion test or an air tightness test, etc., and have better universality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the air-permeable pressure relief valve sub-component permeability testing device proposed in the present invention;

[0028] Figure 2 for Figure 1The enlarged schematic diagram of the AA in the middle;

[0029] Figure 3 for Figure 1 A magnified schematic diagram of the middle BB;

[0030] Figure 4 The main view of the ventilating pressure relief valve subassembly proposed by the present invention Figure 1 ;

[0031] Figure 5 A top view of the ventilating pressure relief valve subassembly proposed by the present invention Figure 1 ;

[0032] Figure 6 The main view of the ventilating pressure relief valve subassembly proposed by the present invention Figure 2 ;

[0033] Figure 7 A top view of the ventilating pressure relief valve subassembly proposed by the present invention Figure 2 ;

[0034] Figure 8 Schematic diagram of the process of the permeability test method of the air-permeable pressure relief valve sub-component proposed by the present invention Figure 1 ;

[0035] Fig. 9 Schematic diagram of the process of the permeability test method of the air-permeable pressure relief valve sub-component proposed by the present invention Figure 2 ;

[0036] Fig.10 Schematic diagram of the process of the permeability test method of the air-permeable pressure relief valve sub-component proposed by the present invention Figure 3 ;

[0037] Fig.11 This is a graph showing the test results of the conventional air and water permeability performance of the circular air-permeable pressure relief valve sub-component;

[0038] Fig.12 This is a graph showing the test results of the conventional air and water permeability performance of the square air-permeable pressure relief valve sub-component.

[0039] Legend:

[0040] 1. Test sample; 11. Test substrate; 111. First through hole; 12. Test metal part; 121. Second through hole; 122. First trough; 13. First adhesive film material; 131. Third through hole; 2. Air-permeable pressure relief valve sub-component; 21. Base metal part; 211. Fourth through hole; 212. Second trough; 22. Support backing; 23. Second adhesive film material; 231. Fifth through hole; 24. Functional film material. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The embodiment of the present application provides a permeability test device and method for a breathable pressure relief valve sub-component, which solves the problem that the prior art can only test the air permeability and water permeability of functional membrane materials, and the breathable pressure relief valve sub-component cannot be sealed on the tooling fixture because its size is much smaller than the tooling fixture of the test equipment, and because the functional membrane material side of the breathable pressure relief valve sub-component must face the high pressure chamber side, and the metal side must face the low pressure chamber side, the test results cannot correctly evaluate the air permeability and water permeability of the breathable pressure relief valve sub-component. The present application fixes the breathable pressure relief valve sub-component on the test sample by heat sealing and then installs it on the fixed fixture of the test equipment. It can adapt to small-sized and arbitrary-shaped breathable pressure relief valve sub-components for air permeability and water permeability testing, and after the test is completed, the tested sub-component is removed by heating, and then other sub-components to be tested are heat-sealed to continue testing. The entire test process is simple to operate and effectively reduces the test cost.

[0043] Please refer to the following examples for details:

[0044] Reference Figure 1-Figure 7 The present invention provides an embodiment of a permeability test device for a breathable pressure relief valve sub-component, and the specific structure includes: a test sample 1 and a breathable pressure relief valve sub-component 2, the breathable pressure relief valve sub-component 2 is fixed on the test sample 1 by heat sealing and compounding, thereby making a test sample that can be used for air permeability, water permeability and other permeability tests, and fixed in a tooling fixture of the test equipment; when performing the air permeability and water permeability test, one side of the functional membrane material 24 of the breathable pressure relief valve sub-component 2 faces the high pressure chamber or the high concentration chamber side, and then the test software of the test instrument is started, and the relevant test conditions are set, and the test is run by clicking.

[0045] Please continue reading Figure 1-Figure 7 In this embodiment, the test sample 1 includes a test substrate 11, a test metal part 12 and a first adhesive film material 13, wherein the first adhesive film material 13 is provided with two layers, the test substrate 11 and the test metal part 12 are heat-sealed and compositely fixed by the first adhesive film material 13, and the test metal part 12 and the base metal part 21 are heat-sealed and compositely fixed by the first adhesive film material 13.

[0046] Exemplarily, the material of the test substrate 11 can be conventional polyolefin material, polyolefin material or aluminum-plastic composite film, preferably modified polyolefin material, which has high tensile strength, chemical stability and thermal stability, and can withstand greater external force without being easily deformed when used as the test substrate 11; the thickness is 0.1mm-1mm, preferably 0.5mm; the appearance is any regular shape (including regular shapes such as circles and squares), preferably a circle, with a diameter of 110±0.5mm.

[0047] Exemplarily, the test metal part 12 can be made of aluminum, aluminum-nickel-plated metal, copper or copper-nickel-plated metal; the thickness is 1mm-5mm, preferably 3mm; the shape is any regular shape (including regular shapes such as circles and squares), preferably a circle, and the diameter does not exceed 80mm, preferably 80mm.

[0048] Furthermore, the test metal part 12 is provided with a first sink 122, and the air-permeable pressure relief valve subcomponent 2 is arranged in the middle of the first sink 122. Specifically, the sink shape is any regular shape (including regular shapes such as circle and square), preferably a circle, and the diameter does not exceed 60 mm, preferably 60 mm.

[0049] Exemplarily, the two layers of first adhesive film material 13 are made of modified polyolefin material, which has excellent bonding performance with metal; the thickness is 0.05-0.2 mm, preferably 0.15 mm; and the outer dimensions are consistent with the outer dimensions of the test metal piece 12 .

[0050] It should be explained in detail that a first through hole 111 is opened in the middle of the test substrate 11, a second through hole 121 is opened in the corresponding position in the middle of the test metal piece 12, and a third through hole 131 is opened in the corresponding position of the first adhesive film 13. The first through hole 111, the second through hole 121 and the third through hole 131 have the same size.

[0051] Please continue reading Figure 1-Figure 7 In this embodiment, the air-permeable pressure relief valve sub-component 2 includes a base metal part 21, a support backing 22, a second adhesive film material 23 and a functional film material 24. The base metal part 21 and the functional film material 24 are heat-sealed and compositely fixed by the second adhesive film material 23.

[0052] The base metal part 21 is provided with a second sink groove 212, and the high air permeability support backing 22 is embedded in the second sink groove 212, which has the function of passing gas and isolating liquid, and has excellent corrosion resistance, airtightness, and high and low temperature and high pressure explosion resistance.

[0053] It should be explained in detail that the base metal member 21 is provided with a fourth through hole 211 , and the second adhesive film 23 is provided with a fifth through hole 231 at a corresponding position. The size of the fifth through hole 231 is consistent with that of the second sink 212 .

[0054] Reference Figure 8-Figure 12 The present invention also provides an embodiment of a method for testing the permeability of a vent pressure relief valve sub-component, which is performed by a vent pressure relief valve sub-component permeability testing device as in the above embodiment, and the testing method steps include:

[0055] S100, preparing a test sample 1 by heat sealing and compounding, and checking the overlapping positions of the through holes of each component;

[0056] S200, fixing the air-permeable pressure relief valve subcomponent 2 on the test sample 1 by hot pressing and laminating, and checking the overlapping positions of the through holes of each component;

[0057] S300, placing the test sample 1 and the air-permeable pressure relief valve sub-component 2 into a test equipment fixture to perform a permeability test.

[0058] Please continue reading Fig. 9 , step S100 includes:

[0059] S101, bonding the first adhesive film material 13 to the end surfaces of both sides of the test metal component 12 by hot pressing and laminating, and checking whether the through-hole positions of the test metal component 12 and the first adhesive film material 13 overlap;

[0060] S102, bonding the test substrate 11 to one end surface of the first adhesive film 13 by hot pressing, and checking whether the through-hole positions of the test substrate 11 and the first adhesive film 13 overlap.

[0061] Please continue reading Fig.10 , step S300 includes:

[0062] S301, the functional film material 24 faces the high pressure chamber or the high concentration chamber, and the test sample 1 and the air-permeable pressure relief valve sub-component 2 are fixed by the test equipment fixture;

[0063] S302, setting test parameters through the test equipment test software to perform an air permeability test or a water permeability test;

[0064] S303, removing the breathable pressure relief valve sub-component 2 by heating, and heat-sealing and compounding other breathable pressure relief valve sub-components 2 for testing.

[0065] Test steps:

[0066] (1) Conventional air and water permeability test of circular air-permeable pressure relief valve sub-component 2:

[0067] The material of the test metal part 12 is Al-1060-H24, with a thickness of 3.0 mm and a diameter of 80.0 mm. The depth of the first sink groove 122 is 1.0 mm, the sink groove diameter is 60.0 mm, and the through hole diameter is 10.0 mm. The test metal part 12 is subjected to surface treatment, firstly, the oil stain on the surface of the test metal part 12 is removed, then the oxide film on the surface of the test metal part 12 is removed, and finally, the test metal part 12 is subjected to passivation treatment, so that an oxide film with excellent corrosion resistance is finally formed on the surface of the test metal part 12;

[0068] The first adhesive film material 13 between the test metal part 12 and the test substrate 11 is made of modified PP material with excellent bonding performance, with a thickness of 0.15mm and a diameter of 80.0mm. The third through hole 131 has a diameter of 10.0mm. It is thermally laminated to the test metal part 12 by a hot press with a pressure of 0.5Mpa, an upper and lower template temperature of 150°C, and a time of 50S. After thermal lamination, it is necessary to check whether the position of the third through hole 131 on the first adhesive film material 13 overlaps with the position of the second through hole 121 of the test metal part 12.

[0069] The first adhesive film material 13 between the test metal part 12 and the air-permeable pressure relief valve sub-component 2 is made of modified PP material with excellent bonding performance, with a thickness of 0.15mm and a diameter of 60.0mm. The diameter of the third through hole 131 is 10.0mm. It is thermally laminated to the test metal part 12 by a hot press, with a pressure of 0.5Mpa, an upper and lower template temperature of 150°C, and a time of 50S. After thermal lamination, it is necessary to check whether the position of the third through hole 131 overlaps with the position of the second through hole 121 of the test metal part 12.

[0070] The test substrate 11 is made of conventional homopolymer PP material with a thickness of 0.5mm and a diameter of 110.0mm. The diameter of the first through hole 111 is 10.0mm. It is bonded to the first adhesive film 13 by hot pressing with a hot press, a pressure of 0.5Mpa, an upper and lower template temperature of 150°C, and a time of 35S. After thermal bonding, it is necessary to check whether the position of the first through hole 111 of the test substrate 11 overlaps with the position of the third through hole 131 of the first adhesive film 13.

[0071] The air-permeable pressure relief valve sub-component 2 is thermally laminated on the first adhesive film material 13 by means of a hot press, with a pressure of 0.5 MPa, an upper and lower template temperature of 150°C, and a time of 50 seconds; after thermal lamination, it is necessary to check whether the position of the through hole on the first adhesive film material 13 overlaps with the position of the fourth through hole 211 of the base metal part 21 of the air-permeable pressure relief valve sub-component 2.

[0072] Gas permeability test of the gas permeability relief valve sub-component 2: Place the prepared sample to be tested into the tooling fixture of the gas permeability tester, with the functional film material 24 facing upward (one side of the functional film material 24 faces the high pressure chamber), and then lock the tooling fixture. Open the test software of the gas permeability tester, set the temperature to 23°C and the humidity to 0% RH, then enter the relevant test sample name, etc., and click the test to run. The test process of entering the setting is: temperature control (2min) → start the vacuum pump (10min) → prepare to evacuate (10s) → evacuate (15min) → stop evacuating 1 (10s) → stop evacuating 2 (10s) → turn off the vacuum pump (10s) → prepare to inlet air (10s) → inlet air (88s) → prepare to test (10s) → test (24h); during the test, the test gas enters from the functional film material 24, passes through the supporting backing 22 of the porous material, and then enters the low-pressure cavity through the base metal part 21. The sensor can automatically measure the volume of the permeable gas. After the test, take out the test sample 1, and then remove the breathable pressure relief valve subcomponent 2 by heating.

[0073] Water permeability test of the air-permeable pressure relief valve sub-component 2: Place the prepared sample 1 to be tested into the fixture of the water permeability tester, and install the functional film material 24 upward (one side of the functional film material 24 faces the high-concentration chamber side), and then lock the fixture. Open the test software of the water permeability tester, set the temperature to 38°C and the humidity to 90% RH, then enter the relevant test sample name, and click the test to run. The test enters the set test process: temperature control (2h) → bypass (1h) → flushing (2h) → test (20h); during the test, water vapor passes through the base metal part 21, through the porous material support backing 22, and then seeps out from the functional film material 24 and enters the low-concentration water vapor cavity. The infrared sensor can automatically measure the weight of the permeated water vapor. After the test, take out the test sample 1, then remove the air-permeable pressure relief valve sub-component 2 by heating, and then heat seal and compound other air-permeable pressure relief valve sub-components 2 for repeated testing.

[0074] (2) Test of the conventional air and water permeability of the square air-pressure relief valve sub-unit:

[0075] The material of the test metal part 12 is Al-1060-H24, with a thickness of 3.0 mm and a diameter of 80.0 mm. The depth of the first sink groove 122 is 1.0 mm, the sink groove diameter is 60.0 mm, and the through hole diameter is 10.0 mm. The test metal part 12 is subjected to surface treatment, firstly, the oil stain on the surface of the test metal part 12 is removed, then the oxide film on the surface of the test metal part 12 is removed, and finally, the test metal part 12 is subjected to passivation treatment, so that an oxide film with excellent corrosion resistance is finally formed on the surface of the test metal part 12;

[0076] The first adhesive film material 13 between the test metal part 12 and the test substrate 11 is made of modified PP material with excellent bonding performance, with a thickness of 0.15mm and a diameter of 80.0mm. The third through hole 131 has a diameter of 10.0mm. It is thermally laminated to the test metal part 12 by a hot press with a pressure of 0.5Mpa, an upper and lower template temperature of 150°C, and a time of 50S. After thermal lamination, it is necessary to check whether the position of the third through hole 131 on the first adhesive film material 13 overlaps with the position of the second through hole 121 of the test metal part 12.

[0077] The first adhesive film material 13 between the test metal part 12 and the air-permeable pressure relief valve sub-component 2 is made of modified PP material with excellent bonding performance, with a thickness of 0.15mm and a diameter of 60.0mm. The diameter of the third through hole 131 is 10.0mm. It is thermally laminated to the test metal part 12 by a hot press, with a pressure of 0.5Mpa, an upper and lower template temperature of 150°C, and a time of 50S. After thermal lamination, it is necessary to check whether the position of the third through hole 131 overlaps with the position of the second through hole 121 of the test metal part 12.

[0078] The test substrate 11 is made of conventional homopolymer PP material with a thickness of 0.5mm and a diameter of 110.0mm. The diameter of the first through hole 111 is 10.0mm. It is bonded to the first adhesive film 13 by hot pressing with a hot press, a pressure of 0.5Mpa, an upper and lower template temperature of 150°C, and a time of 35S. After thermal bonding, it is necessary to check whether the position of the first through hole 111 of the test substrate 11 overlaps with the position of the third through hole 131 of the first adhesive film 13.

[0079] The air-permeable pressure relief valve sub-component 2 is thermally laminated on the first adhesive film material 13 by means of a hot press, with a pressure of 0.5 MPa, an upper and lower template temperature of 150°C, and a time of 50 seconds; after thermal lamination, it is necessary to check whether the position of the through hole on the first adhesive film material 13 overlaps with the position of the fourth through hole 211 of the base metal part 21 of the air-permeable pressure relief valve sub-component 2.

[0080] Gas permeability test of the gas permeability relief valve sub-component 2: Place the prepared sample to be tested into the tooling fixture of the gas permeability tester, with the functional film material 24 facing upward (one side of the functional film material 24 faces the high pressure chamber), and then lock the tooling fixture. Open the test software of the gas permeability tester, set the temperature to 23°C and the humidity to 0% RH, then enter the relevant test sample name, etc., and click the test to run. The test process of entering the setting is: temperature control (2min) → start the vacuum pump (10min) → prepare to evacuate (10s) → evacuate (15min) → stop evacuating 1 (10s) → stop evacuating 2 (10s) → turn off the vacuum pump (10s) → prepare to inlet air (10s) → inlet air (88s) → prepare to test (10s) → test (24h); during the test, the test gas enters from the functional film material 24, passes through the supporting backing 22 of the porous material, and then enters the low-pressure cavity through the base metal part 21. The sensor can automatically measure the volume of the permeable gas. After the test, take out the test sample 1, and then remove the breathable pressure relief valve subcomponent 2 by heating.

[0081] Water permeability test of the air-permeable pressure relief valve sub-component 2: Place the prepared sample 1 to be tested into the fixture of the water permeability tester, and install the functional film material 24 upward (one side of the functional film material 24 faces the high-concentration chamber side), and then lock the fixture. Open the test software of the water permeability tester, set the temperature to 38°C and the humidity to 90% RH, then enter the relevant test sample name, and click the test to run. The test enters the set test process: temperature control (2h) → bypass (1h) → flushing (2h) → test (20h); during the test, water vapor passes through the base metal part 21, through the porous material support backing 22, and then seeps out from the functional film material 24 and enters the low-concentration water vapor cavity. The infrared sensor can automatically measure the weight of the permeated water vapor. After the test, take out the test sample 1, then remove the air-permeable pressure relief valve sub-component 2 by heating, and then heat seal and compound other air-permeable pressure relief valve sub-components 2 for repeated testing.

[0082] It should be explained in detail that, using the test device and test method in the present application, any shape of air-permeable pressure relief valve sub-component 2 within a size of 60mm*60mm, whether it is a round, square or any other shape of valve, can be tested for air permeability and water permeability; wherein, the permeable test gas can be common gases such as CO2, CO, H2, N2, O2 and air, and the test pressure range is 0.01Mpa~0.5Mpa; in addition, this test method is also suitable for air permeability and water permeability testing of the air-permeable pressure relief valve sub-component 2 after reliability testing, such as after a 110°C high-temperature baking test of the air-permeable pressure relief valve, or after a high and low temperature cycle test of -40°C~85°C, or after an electrolyte Dipping reliability test, as well as after an explosion test or an air tightness test, etc. The testing device and method for the air permeability and water permeability of the air-permeable pressure relief valve sub-component 2 in the present application only require the air-permeable pressure relief valve sub-component 2 to be tested to be heat-sealed and compounded in a special sample fixture groove by heating, and the corresponding gas or pure water is introduced; after the test, the tested sub-component is removed by heating, and then other sub-components to be tested are heat-sealed. The operation is simple and the test cost is low.

[0083] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A permeability test device for a vent pressure relief valve sub-component, characterized in that: include: A test specimen (1) and a vent pressure relief valve subassembly (2); The test sample (1) comprises a test substrate (11), a test metal part (12) and a first adhesive film material (13); the air-permeable pressure relief valve subcomponent (2) comprises a base metal part (21), a supporting backing (22), a second adhesive film material (23) and a functional film material (24); the air-permeable pressure relief valve subcomponent (2) is fixed to the test sample (1) by heat-sealing composite.

2. The air-permeable pressure relief valve sub-component permeability testing device according to claim 1, characterized in that: The first adhesive film material (13) is provided with two layers, the test substrate (11) and the test metal part (12) are heat-sealed and compositely fixed by the first adhesive film material (13), and the test metal part (12) and the base metal part (21) are heat-sealed and compositely fixed by the first adhesive film material (13).

3. The air-permeable pressure relief valve sub-component permeability testing device according to claim 1, characterized in that: A first through hole (111) is provided in the middle of the test substrate (11), a second through hole (121) is provided in the middle of the test metal piece (12) at a corresponding position, and a third through hole (131) is provided in the first adhesive film (13) at a corresponding position; the first through hole (111), the second through hole (121) and the third through hole (131) have the same size.

4. The air-permeable pressure relief valve sub-component permeability testing device according to claim 1, characterized in that: The test metal piece (12) is provided with a first sink groove (122), and the air-permeable pressure relief valve sub-component (2) is arranged in the middle of the first sink groove (122).

5. The air-permeable pressure relief valve sub-component permeability testing device according to claim 1, characterized in that: The base metal part (21) and the functional film material (24) are heat-sealed and compositely fixed via the second adhesive film material (23).

6. The air-permeable pressure relief valve sub-component permeability testing device according to claim 1, characterized in that: The base metal part (21) is provided with a second recessed groove (212), and the supporting backing (22) is embedded in the second recessed groove (212).

7. The air-permeable pressure relief valve sub-component permeability testing device according to claim 1, characterized in that: The base metal component (21) is provided with a fourth through hole (211), and the second adhesive film (23) is provided with a fifth through hole (231) at a corresponding position, and the fifth through hole (231) and the second recess (212) of the base metal component (21) have the same size.

8. A method for testing the permeability of a vent pressure relief valve sub-component, characterized in that: The test method is performed by a permeability test device for a vent pressure relief valve subcomponent according to any one of claims 1 to 7, and the test method steps include: S100, preparing a test sample (1) by heat sealing and compounding, and checking the overlapping positions of the through holes of each component; S200, fixing the air-permeable pressure relief valve subassembly (2) on the test sample (1) by heat-pressing and laminating, and checking the overlapping positions of the through holes of each component; S300, placing the test sample (1) and the air-permeable pressure relief valve subassembly (2) into a test equipment fixture to perform a permeability test.

9. The method for testing the permeability of a vent pressure relief valve sub-component according to claim 8, characterized in that: The step S100 includes: S101, bonding the first adhesive film material (13) to the end surfaces of both sides of the test metal piece (12) by hot pressing and laminating, and checking whether the through-hole positions of the test metal piece (12) and the first adhesive film material (13) overlap; S102, bonding the test substrate (11) to one end surface of the first adhesive film (13) by hot pressing, and checking whether the through-hole positions of the test substrate (11) and the first adhesive film (13) overlap.

10. The method for testing the permeability of a vent pressure relief valve sub-component according to claim 8, characterized in that: The step S300 includes: S301, the functional film material (24) faces the high pressure chamber or the high concentration chamber, and the test sample (1) and the air-permeable pressure relief valve sub-component (2) are fixed by a test equipment fixture; S302, setting test parameters through the test equipment test software to perform an air permeability test or a water permeability test; S303, removing the breathable pressure relief valve sub-component (2) by heating, and heat-sealing and compounding other breathable pressure relief valve sub-components (2) for testing.

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