Device for verifying effectiveness of storage battery airtightness detection machine and detection method

Abstract

The invention discloses a device for verifying effectiveness of a storage battery airtightness detection machine and a detection method, and relates to the technical field of micro differential pressure leakage metering and storage battery production inspection, the device comprises a storage battery simulation shell and a leakage simulation part, and the storage battery simulation shell is provided with an air inlet and an air outlet; the air inlet is used for connecting an airtightness detector; the leakage simulation part comprises a pressure gauge and a pressure regulator which are sequentially connected with the exhaust port, the pressure gauge can detect the internal pressure value and the pressure change condition of the storage battery simulation shell, and the pressure regulator can control the internal pressure leakage amount of the storage battery simulation shell and simulate the leakage condition of the storage battery simulation shell. The air tightness detection device is simple and reasonable in structural design, the effectiveness of the air tightness detection machine is judged by detecting the air tightness of the simulated storage battery and utilizing the requirement degree met by the leakage rate, and therefore the reliability and effectiveness of air tightness detection of the storage battery in the production process are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of micro differential pressure leakage measurement and battery production inspection, and more specifically to a device and a detection method for verifying the effectiveness of a battery airtightness detection machine. Background Art

[0002] The airtightness tester is a device used to test the waterproof and sealing performance of products or components, mainly to ensure that the tested object has no water or air leakage defects. It is widely used in the airtightness test of various seals such as new energy, household appliances, auto parts, consumer electronics, medical equipment, security lighting, valves and pipes, wire connectors, etc. The airtightness tester can simulate the real working environment and identify the sealing and waterproof performance of the product under various air pressures.

[0003] With the continuous development of battery technology, the sealing of batteries is crucial to their performance and safety. Airtightness testing machines are widely used in the battery production process to ensure the sealing of batteries.

[0004] At present, the air tightness testing machine in the battery production process tests two standard samples separately and verifies its effectiveness by whether there is leakage. It lacks data support and cannot fully meet the standard requirements.

[0005] Therefore, how to provide a device and a detection method that can effectively verify the effectiveness of an airtightness detection machine is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] In view of this, the present invention provides a device and a detection method for verifying the effectiveness of a battery airtightness detection machine, aiming to solve the above-mentioned technical problems.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A device for verifying the effectiveness of a battery airtightness tester, comprising:

[0009] A battery simulation shell, wherein the battery simulation shell has an air inlet and an air outlet; the air inlet is used to connect to an airtightness detection machine;

[0010] The leakage simulation unit includes a pressure gauge and a pressure regulator which are connected to the exhaust port in sequence, the pressure gauge can detect the pressure value and pressure change inside the battery simulation shell, and the pressure regulator can control the pressure leakage amount inside the battery simulation shell to simulate the leakage of the battery simulation shell.

[0011] Through the above technical scheme, the device provided by the present invention is used to verify the effectiveness of the airtightness detection machine to ensure the sealing of the battery, which solves the systematic problem of the blank of airtight standard sample limit sample in the existing production inspection technology in the battery industry, and is a breakthrough from scratch.

[0012] Preferably, in the above-mentioned device for verifying the effectiveness of a battery air-tightness tester, the air inlet and the air outlet are provided on a battery cover of the battery simulation shell.

[0013] Preferably, in the above-mentioned device for verifying the effectiveness of a battery air-tightness tester, a filler is provided inside the battery simulation shell.

[0014] Preferably, in the above-mentioned device for verifying the effectiveness of a battery airtightness tester, the pressure regulator has a flow regulating valve.

[0015] Preferably, in the above-mentioned device for verifying the effectiveness of a battery air-tightness tester, a leakage reliever is connected to one end of the pressure regulator away from the battery simulation shell.

[0016] Preferably, in the above-mentioned device for verifying the effectiveness of a battery air-tightness tester, the leakage slow release device is composed of a breathing valve and a breathable membrane.

[0017] Preferably, in the above-mentioned device for verifying the effectiveness of a battery air-tightness tester, the air inlet is connected to the air-tightness tester via a plastic tube.

[0018] The present invention also provides a detection method for verifying the effectiveness of a battery airtightness detection machine, using the above-mentioned device for verifying the effectiveness of a battery airtightness detection machine, specifically comprising the following steps:

[0019] S1. Inject or extract gas into the simulated battery shell, adjust the internal and external pressures of the simulated battery shell to the set value, and keep the pressure constant; open the pressure regulator and adjust the leakage of the device to meet the standard requirements;

[0020] S2. Connect the air inlet of the battery simulation shell to the airtightness testing machine, and set the sample testing parameters on the airtightness testing machine;

[0021] S3. Conduct a simulated leakage test to observe whether the airtightness detector can accurately detect the leakage amount and display the corresponding leakage degree, and whether the leakage degree is consistent with the pressure gauge display;

[0022] S4. Perform repeatability testing and repeat the above simulated leak test multiple times to ensure that the results of the airtightness testing machine are stable and repeatable;

[0023] S5. Determine the effectiveness and accuracy of the airtightness testing machine based on each test result.

[0024] Preferably, in the above-mentioned detection method for verifying the effectiveness of a battery airtightness detection machine, in step S1, gas is injected into or extracted from a simulated battery shell so that the pressure inside and outside the simulated battery shell reaches a set value.

[0025] Preferably, in the above-mentioned detection method for verifying the effectiveness of a battery airtightness detection machine, in step S3, if the leakage of the airtightness detection machine exceeds the set leakage value, the airtightness detection machine automatically alarms to verify that the airtightness detection machine is effective.

[0026] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a device and a detection method for verifying the effectiveness of a battery airtightness detection machine, which has the following beneficial effects:

[0027] 1. The device provided by the present invention can accurately simulate the internal pressure state and leakage value of the battery, and verify the effectiveness of the airtightness detection machine through data.

[0028] 2. The detection method of the present invention is simple, reliable, and highly repeatable, can meet process requirements, and can quickly and accurately determine the performance of the airtightness detection machine.

[0029] 3. The present invention can improve the quality control level in the battery production process and ensure the sealing and safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0031] Figure 1 The accompanying drawing is a schematic diagram of the structure of the device for verifying the effectiveness of the battery airtightness detection machine provided by the present invention.

[0032] in:

[0033] 1-battery simulation shell; 2-air inlet; 3-battery cover; 4-exhaust port; 5-pressure gauge; 6-flow regulating valve; 7-pressure regulator; 8-breathing valve; 9-breathable membrane; 10-leakage release device. DETAILED DESCRIPTION

[0034] 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.

[0035] See attached Figure 1 The embodiment of the present invention discloses a device for verifying the effectiveness of a battery airtightness detection machine, comprising:

[0036] A battery simulation shell 1, the battery simulation shell 1 has an air inlet 2 and an exhaust port 4; the air inlet 2 is used to connect an airtightness detection machine;

[0037] The leakage simulation unit includes a pressure gauge 5 and a pressure regulator 7 which are connected to the exhaust port 4 in sequence. The pressure gauge 5 can detect the pressure value and pressure change inside the battery simulation shell 1. The pressure regulator 7 can control the pressure leakage amount inside the battery simulation shell 1 and simulate the leakage of the battery simulation shell 1.

[0038] In order to further optimize the above technical solution, the air inlet 2 and the air outlet 4 are opened on the battery cover 3 of the battery simulation shell 1.

[0039] In order to further optimize the above technical solution, a filler is provided inside the battery simulation shell 1.

[0040] In order to further optimize the above technical solution, the pressure regulator 7 has a flow regulating valve 6 .

[0041] In order to further optimize the above technical solution, a leakage relief device 10 is connected to one end of the pressure regulator 7 away from the battery simulation shell 1 .

[0042] The pressure regulator 7 is used to adjust the pressure leakage of the device so that the leakage meets the requirements; the leakage slow release device 10 assists the pressure regulator 7 to slightly adjust the leakage to ensure that the leakage is more accurate.

[0043] In other embodiments, the position sequence of the pressure regulator 7 and the leakage relief device 10 can be adjusted.

[0044] In order to further optimize the above technical solution, the leakage slow release device 10 is composed of a breathing valve 8 and a breathable membrane 9.

[0045] In order to further optimize the above technical solution, the air inlet 2 is connected to the airtightness detection machine through a plastic tube.

[0046] This embodiment provides a detection method for verifying the effectiveness of a battery airtightness detection machine, using the above-mentioned device for verifying the effectiveness of a battery airtightness detection machine, specifically comprising the following steps:

[0047] S1. Inject or extract gas into the battery simulation shell 1 so that the pressure inside and outside the battery simulation shell 1 reaches the set value and keeps the pressure unchanged; open the pressure regulator 7 and adjust the leakage of the device to meet the standard requirements;

[0048] S2, connecting the air inlet 2 of the battery simulation housing 1 to the airtightness testing machine, and setting the sample testing parameters on the airtightness testing machine;

[0049] S3. Conduct a simulated leakage test to observe whether the airtightness detector can accurately detect the leakage amount and display the corresponding leakage degree, and whether the leakage degree is consistent with the display of pressure gauge 5; if the leakage amount of the airtightness detector exceeds the set leakage amount value, the airtightness detector will automatically alarm to verify the effectiveness of the airtightness detector;

[0050] S4. Perform repeatability testing and repeat the above simulated leak test multiple times to ensure that the results of the airtightness testing machine are stable and repeatable;

[0051] S5. Determine the effectiveness and accuracy of the airtightness testing machine based on each test result.

[0052] Embodiment 1:

[0053] Taking 6-QW-59 battery as an example, the airtightness detection process requirements are: air intake time 7s, internal pressure of the battery reaches 28-30kPa, pressure maintenance 5s, and pressure drop is not higher than 0.30kPa.

[0054] Step 1: Close the flow regulating valve 6 of the pressure regulator 7, and inject gas into the battery simulation housing 1 to make the pressure of the pressure gauge 5 reach 30 kPa. Slowly open the flow regulating valve 6 of the pressure regulator 7, and repeatedly adjust it so that the leakage within 5 seconds reaches 0.30 kPa.

[0055] Step 2: Connect the air inlet 2 of the battery simulation shell 1 to the air outlet of the airtightness testing machine, set the testing parameters on the airtightness testing machine, and start the airtightness testing machine.

[0056] Step 3: Use the airtight detector to detect and observe the leakage. If the leakage exceeds the set leakage value, the detector will automatically alarm to verify that the airtight detector is effective.

[0057] Step 4: Repeat step 3. If the test results are the same, the airtightness tester is determined to be accurate and effective; otherwise, the airtightness tester is invalid.

[0058] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0059] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for verifying the effectiveness of a battery airtightness tester, characterized in that: include: A battery simulation shell (1), the battery simulation shell (1) having an air inlet (2) and an air outlet (4); the air inlet (2) is used to connect to an airtightness detection machine; A leakage simulation unit, the leakage simulation unit comprising a pressure gauge (5) and a pressure regulator (7) connected in sequence to the exhaust port (4), the pressure gauge (5) being capable of detecting the internal pressure value and pressure change of the battery simulation shell (1), and the pressure regulator (7) being capable of controlling the internal pressure leakage of the battery simulation shell (1) to simulate the leakage of the battery simulation shell (1).

2. A device for verifying the effectiveness of a battery airtightness tester according to claim 1, characterized in that: The air inlet (2) and the air outlet (4) are provided on the battery cover (3) of the battery simulation housing (1).

3. A device for verifying the effectiveness of a battery airtightness tester according to claim 1, characterized in that: The battery simulation shell (1) is provided with a filler inside.

4. A device for verifying the effectiveness of a battery airtightness tester according to claim 1, characterized in that: The pressure regulator (7) has a flow regulating valve (6).

5. A device for verifying the effectiveness of a battery airtightness tester according to claim 1, characterized in that: One end of the pressure regulator (7) away from the battery simulation housing (1) is connected to a leakage relief device (10).

6. A device for verifying the effectiveness of a battery airtightness tester according to claim 5, characterized in that: The leakage slow release device (10) is composed of a breathing valve (8) and a breathable membrane (9).

7. A device for verifying the effectiveness of a battery airtightness tester according to claim 1, characterized in that: The air inlet (2) is connected to the air tightness detection machine via a plastic tube.

8. A method for verifying the effectiveness of a battery airtightness tester, using a device for verifying the effectiveness of a battery airtightness tester according to any one of claims 1 to 7, characterized in that: The specific steps include: S1, adjusting the internal and external pressures of the battery simulation housing (1) to reach set values ​​and keeping the pressure constant; opening the pressure regulator (7) and adjusting the leakage of the device to meet the standard requirements; S2, connecting the air inlet (2) of the battery simulation housing (1) to an airtightness testing machine, and setting sample testing parameters on the airtightness testing machine; S3. Conduct a simulated leakage test to observe whether the airtightness detector can accurately detect the leakage amount and display the corresponding leakage degree, and whether the leakage degree is consistent with the display of the pressure gauge (5); S4. Perform repeatability testing and repeat the above simulated leak test multiple times to ensure that the results of the airtightness testing machine are stable and repeatable; S5. Determine the effectiveness and accuracy of the airtightness testing machine based on each test result.

9. A detection method for verifying the effectiveness of a battery airtightness detection machine according to claim 8, characterized in that: In step S1, gas is injected into or extracted from the battery simulation shell (1) so that the pressure inside and outside the battery simulation shell (1) reaches a set value.

10. A detection method for verifying the effectiveness of a battery airtightness detection machine according to claim 8, characterized in that: In step S3, if the leakage of the airtightness detection machine exceeds the set leakage value, the airtightness detection machine automatically alarms to verify that the airtightness detection machine is effective.

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