Multifunctional helium filling trolley for helium detection

Abstract

The utility model relates to the field of new energy battery detection, in particular to a multifunctional helium filling trolley for helium detection, which comprises a movable trolley body, a helium filling pipeline, an evacuation pipeline and a discharge pipeline are arranged on the trolley body, and the helium filling pipeline, the evacuation pipeline and the discharge pipeline are communicated with a liquid injection port of a battery pack in parallel; the vehicle body is provided with a helium tank for filling helium into the battery pack through a helium filling pipeline, and the vehicle body is also provided with a vacuum pump for performing negative pressure pumping treatment on the battery pack through an evacuation pipeline. According to the utility model, the mobile leak detection of the battery is realized, and the leak detection efficiency of the battery is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of new energy battery detection, in particular to a multifunctional helium-filling trolley for helium detection. Background Art

[0002] New energy battery packs, typically energy storage devices composed of multiple cells, are key components in new energy vehicles and energy storage systems. During the production process, the integrity of the internal structure, sealing, and material reliability of new energy battery packs are crucial. Even minor leaks or poor sealing in the battery pack can lead to electrolyte volatilization, gas leakage, or moisture intrusion, impacting battery performance, safety, and service life. Therefore, helium filling testing has become a crucial tool for ensuring battery pack quality. Helium, being an extremely small gas molecule, can easily pass through tiny pores and cracks. Leveraging this property, the battery pack can be filled with helium and tested for leaks to accurately determine its sealing. This method is not only highly sensitive but also covers all potential leak points in the battery pack, ensuring the accuracy of the test results.

[0003] The traditional helium filling test for battery packs usually involves placing the battery pack in a closed test environment such as a vacuum box, filling a certain amount of helium into the battery pack through an inflation device, and using a mass spectrometer or other highly sensitive gas detection equipment to monitor the helium concentration in the closed environment of the battery pack in real time. If there is a leak in the battery pack, helium will escape from the leak point, causing the helium concentration in the test environment to increase. By analyzing the changes in helium concentration, the leakage of the battery pack can be accurately determined. The disadvantage of this detection method is that it requires an independent transportation system to transport the battery pack to the leak detection station for testing after production is completed; such as using a crane or other lifting equipment to lift the battery pack from the storage area or pre-assembly line and transport it to the leak detection station. However, new energy battery packs often weigh nearly a ton, and each transportation process is time-consuming and labor-intensive. To solve the transfer problem, as described in publication number "CN220356603U", an outward-extending extension rack is provided on the rack on one side of the working space (i.e., the sealed test environment). The working space is connected to the battery pack production line through a conveyor rail mechanism on the extension rack, and the battery pack is directly sent from the production line to the test station for testing. However, this detection method requires the establishment of an independent transfer line in the production workshop. Although it solves the problem of laborious battery pack transportation, the existence of the transfer line greatly reduces the space utilization rate of the production workshop, and it still takes time to transport the battery pack back and forth, which does not shorten the time cost of helium filling. The efficiency of battery leakage detection is still low, so it needs to be solved urgently. Utility Model Content

[0004] In order to avoid and overcome the technical problems existing in the prior art, the present invention provides a multifunctional helium filling trolley for helium detection. The present invention realizes mobile leak detection of batteries and greatly improves the efficiency of battery leakage detection.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A multifunctional helium-filling trolley for helium inspection comprises a movable body, on which are provided a helium-filling pipeline, an evacuation pipeline and an external discharge pipeline, wherein the helium-filling pipeline, the evacuation pipeline and the external discharge pipeline are connected in parallel with the liquid filling port of a battery pack; a helium cylinder for filling the battery pack with helium through the helium-filling pipeline is mounted on the body, and a vacuum pump for applying negative pressure to the battery pack through the evacuation pipeline is also mounted on the body.

[0007] As a further solution of the present invention: a helium cylinder, a pressure sensor and a pressure reducing valve are sequentially arranged along the helium flow direction of the helium filling pipeline, and a first front solenoid valve and a first rear solenoid valve are respectively arranged at the upstream end and the downstream end of the pressure reducing valve.

[0008] As a further solution of the present invention: a vacuum air pressure regulating valve and a vacuum pump are sequentially arranged along the gas flow direction on the evacuation pipeline, and a second front solenoid valve and a second rear solenoid valve are respectively arranged at the upstream end and the downstream end of the vacuum air pressure regulating valve.

[0009] As a further solution of the present invention: an external discharge solenoid valve is installed on the external discharge pipeline, and the outlet of the external discharge solenoid valve is connected to the atmospheric environment or the recovery tank.

[0010] As a further solution of the present invention, a flow meter and a pressure differential valve are installed at the liquid filling port of the battery pack.

[0011] As a further solution of the present invention: the vehicle body has a multi-layer frame structure. From top to bottom, each frame layer of the vehicle body includes an operating area, a valve installation area and a vacuum pump installation area. The bottom of the vacuum pump installation area is open, and at least two groups of parallel positioning frames are hung on the frame at the opening. Each positioning frame is fixed after sliding along the vehicle body frame; each positioning frame is a U-shaped frame with an opening facing upward, and each positioning frame supports and fixes the vacuum pump from bottom to top.

[0012] As a further solution of the present invention: at least two groups of racks arranged in parallel and staggered in height are provided on the side of the vehicle body, and the helium cylinders are detachably mounted on the racks along the vertical direction.

[0013] As a further solution of the present invention, universal wheels are provided at the four corner ends of the bottom of the vehicle body, and a support column capable of telescopic movement in the vertical direction is also provided at the location of each universal wheel.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This utility model integrates a helium detection system into a mobile vehicle. The vehicle can directly detect battery packs near the production line. First, the battery pack is negatively pressurized by evacuating the pipeline, and then helium is filled to make the pressure inside the battery pack reach positive pressure. The product leaks are detected manually with a suction gun, and the leak detector checks the suspected leak points of the workpiece one by one. If the test is qualified, no alarm will be given. If there is a leak, an alarm will be given. This realizes mobile leak detection of batteries and greatly improves the efficiency of battery leakage detection.

[0016] 2. In the present invention, each pipeline is connected to the battery pack in parallel in the vehicle body. Through the regulation of each valve and sensor, the detection program is controlled to proceed in sequence. After the leak detection is completed, the helium can be directly discharged into the atmosphere through the external exhaust pipeline or recovered in the recovery tank, which is a fast detection method.

[0017] 3. The multi-layer frame layout of the vehicle body of the utility model is designed with partitions, and different functional parts are installed separately. The positioning frames are hung at the bottom of the frame of the vehicle body. Each positioning frame supports and fixes the vacuum pump from bottom to top; each positioning frame can slide along the length of the vehicle body and is fixed by bolts or pins after sliding, so as to adapt to vacuum pumps of different sizes.

[0018] 4. When the vehicle body of the present invention moves to the vicinity of the battery pack, the support column is extended and abuts against the ground through the hydraulic lifting mechanism during detection, thereby positioning the vehicle body, preventing the vehicle body from moving, and improving the stability of the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 This is the pipeline connection diagram of the present utility model.

[0021] In the picture:

[0022] 1. Battery pack; 11. Flow meter; 12. Differential pressure valve;

[0023] 2. Helium filling pipeline; 21. Helium cylinder; 22. Pressure sensor;

[0024] 23. Pressure reducing valve; 231. First front solenoid valve; 232. First rear solenoid valve;

[0025] 3. Evacuation pipeline; 31. Vacuum pump; 32. Vacuum pressure relief valve;

[0026] 321, second rear solenoid valve; 322, second front solenoid valve;

[0027] 4. External exhaust pipe; 41. External exhaust solenoid valve;

[0028] 5. Car body; 51. Operation area; 52. Valve installation area; 53. Vacuum pump installation area;

[0029] 54. Positioning frame; 55. Universal wheel; 56. Support column; 57. Hanging bracket. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0031] See also Figures 1-2 In one embodiment of the present invention, a multifunctional helium-filling cart for helium testing includes a body 5 having a three-layer frame structure. From top to bottom, the upper layer of the body 5 comprises an operating area 51, a valve installation area 52 in the middle layer, and a vacuum pump installation area 53 in the lower layer. The operating area 51 is provided with a touch screen and a button panel for controlling the various valves, the vacuum pump 31, and the helium cylinder 21. A buzzer is also provided in the operating area 51 to serve as a warning of dangers during the testing process.

[0032] The valve installation area 52 is equipped with various valves and sensors, and the data from the valves and sensors are transmitted to the operation area 51. The various pipelines on the vehicle body 5 are also built into the valve installation area 52, specifically including the helium filling pipeline 2, the vacuum pipeline 3 and the exhaust pipeline 4.

[0033] The helium filling line 2 is provided with a helium cylinder 21, a pressure sensor 22, and a pressure reducing valve 23, sequentially arranged along the helium flow direction. A first pre-solenoid valve 231 and a first post-solenoid valve 232 are respectively provided at the upstream and downstream ends of the pressure reducing valve 23. The evacuation line 3 is provided with a vacuum pressure reducing valve 32 and a vacuum pump 31, sequentially arranged along the gas flow direction. A second pre-solenoid valve 322 and a second post-solenoid valve 321 are respectively provided at the upstream and downstream ends of the vacuum pressure reducing valve 32. The exhaust line 4 is equipped with an exhaust solenoid valve 41, the outlet of which is connected to the atmosphere or a recovery tank.

[0034] A set of connectors can be provided on the vehicle body 5, connecting to the liquid filling port of the battery pack 1. The nozzles of the helium filling line 2, the evacuation line 3, and the external discharge line 4 are connected in parallel to the connectors on the vehicle body 5. A flow meter 11 and a differential pressure valve 12 are installed at the liquid filling port of the battery pack 1.

[0035] The vacuum pump mounting area 53 is used to secure the vacuum pump 31. It has an open bottom, where multiple sets of parallel positioning frames 54 are mounted. These U-shaped frames are open at the top and are mounted on the bottom of the vehicle body 5. Each positioning frame 54 supports and secures the vacuum pump 31 from bottom to top. Each positioning frame 54 can slide along the length of the vehicle body 5 and is secured with bolts or pins to accommodate vacuum pumps 31 of varying sizes.

[0036] A hanger 57 is provided on the side of the vehicle body 5 for vertically suspending the helium cylinder 21. Four sets of universal wheels 55 are provided at the bottom of the vehicle body 5. Support columns 56 are vertically provided beside the universal wheels 55. The support columns 56 are preferably hydraulic lift mechanisms that extend and contact the ground during testing to position the vehicle body and prevent it from moving.

[0037] During testing, move the vehicle 5 to the battery pack 1 on the production line, turn on the power switch of the vehicle 5, and start the equipment. After the equipment is started, open the valve of the helium cylinder 21, adjust the pressure of the vacuum pressure relief valve 32 and the pressure relief valve 23 to the appropriate value, and then prepare for operation.

[0038] Observe the battery pack's exterior to ensure it is smooth and free of major leaks. Install the sealing plug and the inflation port, and start the helium evacuation and filling process with one click on the display in the operation area:

[0039] The system first pumps air down to -4 kPa in Battery Pack 1 to detect major leaks. If the pressure at the leak detection port reaches the set value within the set time, the pre-pump is successful and the process proceeds to the next step. If the pressure at the leak detection port does not reach the set value within the set time, it indicates that the joint is not properly connected, or that the workpiece is properly connected but has significant damage, an automatic alarm will be issued.

[0040] If the pre-extraction fails, the operator can press the Stop button to stop the test, or set the system to automatically stop. After stopping, the operator will check and handle the workpiece: if the workpiece is damaged, it is unqualified and the MES will release it to the repair area; if the connector is not properly connected, the workpiece connector is reconnected and the Start button is pressed to start the test process.

[0041] After the pre-pumping is successful, the valve body opens and helium is automatically filled into the battery pack 1. When the pressure reaches +3KPa, the helium detector is automatically started for testing. A sniffer gun is used to manually detect product leaks. The leak detector checks the suspected leak points of the workpiece one by one. If the test is qualified, no alarm will be given. If there is a leak, an alarm will be given.

[0042] After the test, the leak detector records the leak rate data, binds it to the product barcode, and saves it locally. A manual completion signal is triggered, causing the device to release pressure and helium. The maximum leak rate during the test is automatically collected and uploaded to the MES system. After the leak test is complete, the stop button is pressed and the leak detection interface plug is manually opened. Vehicle 5 receives the signal and moves to the corresponding area via remote control. If a defective product is detected, the leak detector will sound an alarm, clearly identifying the leak point and the defective area.

[0043] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0044] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

Claims

1. A multifunctional helium filling trolley for helium inspection, characterized in that: The invention comprises a movable vehicle body (5), on which a helium filling pipeline (2), an evacuation pipeline (3) and an external discharge pipeline (4) are provided, wherein the helium filling pipeline (2), the evacuation pipeline (3) and the external discharge pipeline (4) are connected in parallel with the liquid injection port of the battery pack (1); a helium cylinder (21) for filling the battery pack (1) with helium through the helium filling pipeline (2) is installed on the vehicle body (5); and a vacuum pump (31) for evacuating the battery pack (1) to achieve negative pressure treatment through the evacuation pipeline (3) is also installed on the vehicle body (5).

2. The multifunctional helium filling trolley for helium inspection according to claim 1, characterized in that: A helium cylinder (21), a pressure sensor (22), and a pressure reducing valve (23) are sequentially arranged on the helium filling pipeline (2) along the helium flow direction, and a first front solenoid valve (231) and a first rear solenoid valve (232) are respectively arranged at the upstream end and the downstream end of the pressure reducing valve (23).

3. The multifunctional helium filling trolley for helium inspection according to claim 1, characterized in that: A vacuum pressure regulating valve (32) and a vacuum pump (31) are sequentially arranged on the evacuation pipeline (3) along the gas flow direction, and a second front solenoid valve (322) and a second rear solenoid valve (321) are respectively arranged at the upstream end and the downstream end of the vacuum pressure regulating valve (32).

4. The multifunctional helium filling trolley for helium inspection according to claim 1, characterized in that: An external discharge solenoid valve (41) is installed on the external discharge pipeline (4), and the outlet of the external discharge solenoid valve (41) is communicated with the atmospheric environment or the recovery tank.

5. A multifunctional helium-filling trolley for helium inspection according to any one of claims 1 to 3, characterized in that: A flow meter (11) and a pressure differential valve (12) are installed at the liquid injection port of the battery pack (1).

6. A multifunctional helium-filling trolley for helium inspection according to any one of claims 1 to 3, characterized in that: The vehicle body (5) is a multi-layer frame structure. From top to bottom, each frame layer of the vehicle body (5) includes an operating area (51), a valve installation area (52) and a vacuum pump installation area (53). The bottom of the vacuum pump installation area (53) is open, and at least two groups of parallel positioning frames (54) are hung on the frame at the opening. Each positioning frame (54) is fixed after sliding along the vehicle body frame; each positioning frame (54) is a U-shaped frame with an opening facing upward, and each positioning frame (54) supports and fixes the vacuum pump (31) from bottom to top.

7. The multifunctional helium-filling trolley for helium inspection according to claim 6, characterized in that: At least two groups of racks (57) arranged in parallel and staggered in height are provided on the side of the vehicle body (5); the helium cylinder (21) is detachably mounted on the rack (57) along the vertical direction.

8. The multifunctional helium filling trolley for helium inspection according to claim 6, characterized in that: Universal wheels (55) are arranged at the four corner ends of the bottom of the vehicle body (5), and support columns (56) capable of generating telescopic movements in a vertical direction are also arranged at the locations of the universal wheels (55).

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