Hairis Technology has made many breakthroughs in air tightness testing in the field of new energy vehicles, which we have also covered in previous cases, including new energy vehicle charging guns.When people choose a charging gun, they will first consider its safety. In order to ensure the safety of people using the charging gun, the state stipulates that the highest dustproof and waterproof level of the charging gun must reach IP68. Therefore, manufacturers will conduct air tightness testing for new energy vehicle charging guns during production.This time we will share the air tightness test case of the new energy vehicle charging gun for your reference. We hope it can be helpful to everyone.

(Air tightness tester for new energy vehicle charging gun)

one, The appearance of the new energy vehicle charging gun and the difficulties in detection

1. The charging gun and charging wire used for the air tightness test this time are connected as a whole. The front charging part has an irregular shape. In order to ensure the use of the charging gun, there is a special handle. The lower wire is connected to the middle battery board as a whole, and the butt gap is more obvious;

(New energy vehicle charging gun)

2. In order to ensure the sealing of the charging gun, the manufacturer used special waterproof materials to wrap it without obvious docking gaps. Such a shape is difficult to fix during inspection, which is detrimental to direct inspection. It is impossible to judge the air tightness of the charging gun through the gas leakage value.

2. Breakthrough in difficult air tightness testing of new energy vehicles

1. In view of the special shape of the charging gun, Hairis specially customized a mold for the car charging gun. The entire mold is cast according to the overall shape of the charging gun. After the charging gun is put in, it snaps just right. The rear-end connecting wires are placed in the groove at the rear end of the mold, so that a closed space can be formed by closing the upper and lower molds during inspection;

(New energy vehicle charging gun air tightness test tooling mold)

3. Put the charging gun into the tooling mold and connect it to our instrument. There is a valve island, gas tank and other components inside the instrument as well as the program we have set. After the connection is made, press the start button when testing the wire.At this time, the upper and lower molds begin to close, and clean gas without impurities is filled into the mold. The instrument display screen will judge the sealing degree of the charging gun based on the gas saturation inside the mold.

(Details of the new energy vehicle charging gun air tightness test tooling mold)

4. If the car charging gun is not sealed and air leakage occurs, the leakage value displayed in the instrument will become larger and larger, and the pressure value will decrease at the same time.At this time, it can be determined whether the car charging gun is leaking, and the instrument test result will also show NG, which means the air tightness test failed.If the tested car charging gun does not leak, the gas in the tooling mold will be in a constant state after inflation. The pressure value and leakage value displayed on the instrument are also stable. The instrument test result will display OK, indicating that the air tightness test has been passed.

(New energy vehicle charging gun air tightness testing tool)

3. Air tightness detector parameters of new energy vehicle charging gun

1. High-sensitivity pressure sensing and adjustment unit, combined with advanced differential pressure software algorithm, the minimum resolution can reach 0.1Pa. This algorithm has obtained a national patent.

2. Patented technology independently developed by Hairuis."IVT pneumatic sealing valve island", greatly improving the test accuracy, ensuring the stability of the instrument, and the inflation speed is also greatly improved.

3. Multiple test functions: The instrument integrates two pressure forms, positive and negative, and 8 test methods: two pressure forms and five test methods can be programmed into more than 20 test functions.

4. It has more than 200 groups of subroutines. Each group of subroutines can be programmed independently, single selected and combined to meet various complex testing requirements.

5. Full-touch large-screen intelligent operating system, graphical UI design based on the detection process, the operation interface is simple and clear, easy to teach and learn.

6. A variety of pressure adjustment components and ranges are optional, with a wide air pressure range (-80KPA&-1MPa) optional.The optional electronic pressure regulating valve can realize multiple sets of pressure sequential tests.

7. Multiple communication interfaces: built-in RS232 serial port, RJ45 network port, USB communication interface, LTP external I/O control port, supporting multiple communication protocols.

8. Optional barcode scanning function and printer are available to facilitate product data management and quality traceability. The instrument history record can reach up to 200,000 items and can be exported to the computer in batches.

9. The standard volume identification function can automatically identify the volume of the sample to be tested, and measure and judge the leakage rate in a volumetric manner.

10. Ultra-high stability and ease of use have passed the rigorous test of the market.

11. A variety of accessories are available, including inflatable bypass, quick connector, and standard leak hole. At the same time, the instrument supports third-party calibration and can issue a calibration report.

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