A helium detecting device for large cylindrical batteries

Abstract

The utility model belongs to big cylinder battery pick measurement technical field discloses a kind of big cylinder battery helium pick measurement equipment, including machine body, vacuumizing device and helium filling device, detection box is equipped on the machine body, the inside of the detection box is equipped with at least one independent control's working room, vacuum tank is equipped in the working room;Vacuumizing device is communicated with the vacuum tank, for the vacuum tank is extracted vacuum, to detect the leakproofness of big cylinder battery.The utility model is equipped with detection box on machine body, vacuum tank is equipped in detection box, collocation vacuumizing device, helium filling device and helium detector, so that big cylinder battery can carry out leakproofness detection in relatively independent and controllable environment, vacuum tank is extracted vacuum by vacuumizing device, simulate negative pressure environment in battery actual use, helium filling device is used to fill helium to battery interior again, the helium concentration leaked to vacuum tank is detected by means of helium detector, to judge battery leakproofness.

Description

Technical Field

[0001] This utility model belongs to the field of large cylindrical battery detection technology, specifically relating to a helium detection device for large cylindrical batteries. Background Technology

[0002] Against the backdrop of a global energy structure transition towards cleaner and lower-carbon energy sources, large cylindrical battery energy storage technology has become a core means of balancing clean energy and grid stability. Large cylindrical batteries (such as the 120420 and 200420 models) are gaining increasing market share in the energy storage field due to their advantages, including high single-cell energy, long cycle life, standardized production processes, high material utilization, easy recycling and dismantling of end-of-life batteries, and high recovery rates. They are also becoming an important technological pathway to achieving carbon neutrality.

[0003] Because the positive and negative terminals of a large cylindrical battery must be insulated, the casing size of a large cylindrical battery is... For batteries with a length of 100-600mm, it is difficult to achieve integrated production, requiring the assembly, welding, and riveting of multiple parts. The outer casing of large cylindrical batteries is also assembled, welded, and riveted from multiple parts, which can lead to poor sealing due to cracks, micropores, and other defects. To address this, a helium gas testing device for large cylindrical batteries was designed to test their sealing performance and reject products with poor sealing. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a helium gas detection device for large cylindrical batteries, aiming to solve to some extent the technical problem in the prior art where the outer casing of large cylindrical batteries is assembled, welded, and riveted from multiple parts, which can lead to poor sealing conditions such as cracks and micropores.

[0005] The technical solution of this utility model is: a helium detection device for a large cylindrical battery, comprising:

[0006] The machine body is equipped with a testing box, and the testing box contains at least one independently controlled working chamber, which contains a vacuum chamber.

[0007] A vacuum pumping device, connected to the vacuum chamber, is used to evacuate the vacuum chamber to test the sealing performance of the large cylindrical battery.

[0008] A helium filling device includes a helium source and a driving component. The driving component is equipped with a filling head, which is connected to the helium source. The driving component is used to drive the filling head to move to dock with the liquid injection port of the large cylindrical battery and fill helium into the large cylindrical battery.

[0009] A helium detector, located inside the machine body, is connected to the vacuum chamber via a pipe. It is used to detect the concentration of helium leaking from the large cylindrical battery casing into the vacuum chamber and to issue an alarm signal when the detected helium concentration reaches a set value.

[0010] In some embodiments, the body is configured as upper and lower parts, the detection box is located in the upper part of the body, and the lower part of the body is provided with a space for placing a helium detector.

[0011] In some embodiments, the drive assembly includes a mounting plate and a cylinder, with support seats fixedly connected to both sides of the top of the mounting plate, and the support seats having slots for fixing a large cylindrical battery.

[0012] The output end of the cylinder is fixedly connected to a fixing block, and the inflation head is fixedly connected inside the fixing block. The inflation head corresponds to the liquid injection port of the large cylindrical battery.

[0013] In some embodiments, a mounting base is fixedly connected to the tail end of the cylinder, and the mounting base is fixedly connected to the top of the mounting plate.

[0014] In some embodiments, the vacuuming device includes a vacuum cylinder, which is fixed inside the machine body. The suction end of the vacuum cylinder is fixedly connected to a vacuum tube, which is connected to a vacuum chamber.

[0015] In some embodiments, a first connecting pipe is fixedly connected to one side of the back of the vacuum chamber. One end of the first connecting pipe is connected to an inflation head, and the other end of the first connecting pipe is threadedly connected to a first connector for filling with air and helium.

[0016] In some embodiments, a second connecting pipe is fixedly connected to the other side of the back of the vacuum chamber. One end of the second connecting pipe communicates with the interior of the vacuum chamber, and the other end of the second connecting pipe is threaded with a second connector for air and helium exhaust.

[0017] In some embodiments, an air inlet pipe and an air outlet pipe are fixedly connected to one side of the vacuum chamber.

[0018] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0019] 1. In this application, a testing box is installed on the main body, and a vacuum chamber is installed inside the testing box. It is equipped with a vacuum pumping device, a helium filling device, and a helium detector, which enables the large cylindrical battery to undergo sealing performance testing in a relatively independent and controllable environment. The vacuum chamber is evacuated by the vacuum pumping device to simulate the negative pressure environment in actual battery use. Then, helium is filled into the battery using the helium filling device. The concentration of helium leaking into the vacuum chamber is detected by the helium detector, thereby judging the battery's sealing performance, effectively eliminating products with poor sealing, and ensuring the stability and reliability of the large cylindrical battery in energy storage applications.

[0020] 2. In this application, the filling head can be accurately moved to align with the liquid filling port of the large cylindrical battery under the drive of the cylinder, so as to achieve precise filling of helium. This avoids the problem of helium leakage or insufficient filling caused by inaccurate alignment of the filling head, improves the helium filling efficiency, and also provides a reliable guarantee for the subsequent accurate detection of battery sealing by the helium detector, further improving the accuracy and stability of the entire detection process. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the vacuum chamber structure of this utility model;

[0024] Figure 3 This is a rear view schematic diagram of the vacuum chamber structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the internal structure of the vacuum chamber of this utility model;

[0026] Figure 5 This is a flowchart illustrating the structure of this utility model.

[0027] In the attached image:

[0028] 1. Main body; 2. Testing box; 3. Vacuum box; 4. Mounting plate; 5. Support base; 6. Large cylindrical battery; 7. Cylinder; 8. Fixing block; 9. Inflation head; 10. Mounting base; 11. Vacuum tube; 12. Vacuum cylinder; 13. Inlet pipe; 14. Outlet pipe; 15. First connecting pipe; 16. First connector; 17. Second connecting pipe; 18. Second connector. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] Please see Figure 1-5 A helium detection device for a large cylindrical battery includes a body 1, a vacuum pumping device, a helium filling device, and a helium detector. The body 1 is equipped with a detection box 2, and the detection box 2 has at least one independently controlled working chamber. The working chamber is equipped with a vacuum box 3. The vacuum pumping device is connected to the vacuum box 3 and is used to evacuate the vacuum box 3 to detect the sealing performance of the large cylindrical battery.

[0031] The helium filling device includes a helium source and a drive assembly. The drive assembly is equipped with a filling head 9, which is connected to the helium source. The drive assembly is used to move the filling head 9 to dock with the liquid injection port of the large cylindrical battery and fill helium into the large cylindrical battery.

[0032] The helium detector is located inside the main body 1 and is connected to the vacuum chamber 3 through a pipe. It is used to detect the concentration of helium leaking from the large cylindrical battery casing into the vacuum chamber 3 and to issue an alarm signal when the helium concentration reaches the set value.

[0033] The helium detector, model INFICON HLT560, is a precision instrument specifically designed to detect helium concentration. Helium, as an inert gas, has an extremely small molecular size and excellent diffusivity, allowing it to easily pass through even the smallest leaks. Helium detectors typically utilize mass spectrometry or thermal conductivity detection techniques to accurately measure the helium content in the environment.

[0034] After the vacuuming device evacuates the vacuum chamber, the helium filling device precisely fills the large cylindrical battery with helium. If the large cylindrical battery has poor sealing, such as cracks or micropores, helium will escape from these leakage points and enter the vacuum chamber 3.

[0035] The helium detector, connected to vacuum chamber 3 via a pipe, can extract gas samples from the vacuum chamber for testing, accurately measuring the helium concentration leaking from the large cylindrical battery casing into vacuum chamber 3 in real time. Once the helium concentration reaches a preset alarm value, the helium detector will immediately issue an alarm signal, alerting the operator that the large cylindrical battery has a sealing problem and needs to be rejected.

[0036] The main body 1 is equipped with a test chamber 2, which contains a vacuum chamber 3. It is equipped with a vacuum pumping device, a helium filling device, and a helium detector, which allows the large cylindrical battery to undergo a sealing test in a relatively independent and controllable environment. The vacuum pumping device evacuates the vacuum chamber 3 to simulate the negative pressure environment in actual battery use. Then, the helium filling device fills the battery with helium. The helium detector detects the concentration of helium leaking into the vacuum chamber 3, thereby judging the battery's sealing performance. This effectively eliminates products with poor sealing and ensures the stability and reliability of the large cylindrical battery in energy storage applications.

[0037] The main body 1 is divided into upper and lower parts. The detection box 2 is located in the upper part of the main body 1, and the lower part of the main body 1 has a space for placing the helium detector.

[0038] The drive assembly includes a mounting plate 4 and a cylinder 7. Support seats 5 are fixedly connected to both sides of the top of the mounting plate 4, and each support seat 5 has a slot for fixing the large cylindrical battery 6. A fixing block 8 is fixedly connected to the output end of the cylinder 7, and an inflation head 9 is fixedly connected within the fixing block 8, corresponding to the electrolyte filling port of the large cylindrical battery 6. Driven by the cylinder 7, the inflation head 9 can accurately move to align with the electrolyte filling port of the large cylindrical battery, achieving precise helium filling. This avoids helium leakage or insufficient filling caused by inaccurate alignment of the inflation head 9, improving helium filling efficiency. It also provides a reliable guarantee for the subsequent accurate detection of battery sealing by a helium detector, further improving the accuracy and stability of the entire detection process.

[0039] The tail end of the cylinder 7 is fixedly connected to the mounting base 10, which is fixedly connected to the top of the mounting plate 4 to facilitate the fixing of the cylinder 7.

[0040] The vacuum device includes a vacuum cylinder 12 with a valve. The vacuum cylinder 12 is fixed inside the body 1. The suction end of the vacuum cylinder 12 is fixedly connected to a vacuum tube 11, which is connected to the vacuum chamber 3.

[0041] A first connecting pipe 15 is fixedly connected to one side of the back of the vacuum box 3. One end of the first connecting pipe 15 is connected to the inflation head 9, and the other end of the first connecting pipe 15 is threaded to a first connector 16, which is used for filling with air and helium.

[0042] A second connecting pipe 17 is fixedly connected to the other side of the back of the vacuum chamber 3. One end of the second connecting pipe 17 is connected to the inside of the vacuum chamber 3, and the other end of the second connecting pipe 17 is threaded with a second connector 18. The second connector 18 is used for air and helium exhaust. Helium in the vacuum chamber 3 can be recovered after the test is completed, realizing resource recycling and reducing the test cost.

[0043] One side of the vacuum chamber 3 is fixedly connected to an inlet pipe 13 and an outlet pipe 14, which are used to control the entry and exit of gas during the detection process.

[0044] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A helium detection device for a large cylindrical battery, characterized in that, include: The machine body (1) is provided with a detection box (2), and the detection box (2) is provided with at least one independently controlled working chamber, and the working chamber is provided with a vacuum box (3); A vacuum pumping device is connected to the vacuum chamber (3) and is used to evacuate the vacuum chamber (3) to test the sealing performance of the large cylindrical battery. Helium filling device, including helium source and drive assembly, the drive assembly is provided with filling head (9), the filling head (9) is connected to helium source, the drive assembly is used to drive filling head (9) to move to dock with the liquid injection port of large cylindrical battery and fill helium into the large cylindrical battery; A helium detector is installed inside the body (1). The helium detector is connected to the vacuum chamber (3) through a pipe. It is used to detect the concentration of helium leaking from the outer shell of the large cylindrical battery into the vacuum chamber (3) and to issue an alarm signal when the helium concentration reaches a set value.

2. The helium detection device for large cylindrical batteries as described in claim 1, characterized in that, The body (1) is divided into upper and lower parts. The detection box (2) is located in the upper part of the body (1), and the lower part of the body (1) is provided with a space for placing a helium detector.

3. The helium detection device for large cylindrical batteries as described in claim 1, characterized in that, The drive assembly includes a mounting plate (4) and a cylinder (7). Both sides of the top of the mounting plate (4) are fixedly connected to support seats (5). The support seats (5) are provided with slots for fixing the large cylindrical battery (6). The output end of the cylinder (7) is fixedly connected to a fixing block (8), and the inflation head (9) is fixedly connected inside the fixing block (8). The inflation head (9) corresponds to the liquid injection port of the large cylindrical battery (6).

4. The helium detection device for large cylindrical batteries as described in claim 3, characterized in that, The tail end of the cylinder (7) is fixedly connected to a mounting base (10), which is fixedly connected to the top of the mounting plate (4).

5. The helium detection device for large cylindrical batteries as described in claim 1, characterized in that, The vacuum device includes a vacuum cylinder (12), which is fixed inside the body (1). The suction end of the vacuum cylinder (12) is fixedly connected to a vacuum tube (11), which is connected to a vacuum box (3).

6. The helium detection device for large cylindrical batteries as described in claim 1, characterized in that, A first connecting pipe (15) is fixedly connected to one side of the back of the vacuum box (3). One end of the first connecting pipe (15) is connected to the inflation head (9), and the other end of the first connecting pipe (15) is threadedly connected to a first connector (16). The first connector (16) is used for filling with air and helium.

7. The helium detection device for large cylindrical batteries as described in claim 1, characterized in that, A second connecting pipe (17) is fixedly connected to the other side of the back of the vacuum box (3). One end of the second connecting pipe (17) is connected to the inside of the vacuum box (3), and the other end of the second connecting pipe (17) is threaded with a second connector (18). The second connector (18) is used for air and helium to be discharged.

8. The helium detection device for large cylindrical batteries as described in claim 1, characterized in that, The vacuum chamber (3) has an air inlet pipe (13) and an air outlet pipe (14) fixedly connected to one side.

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