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What are the difficulties of air tightness test for the control box of automobile charging gun?

As one of the products in the field of new energy vehicles, the manufacturers will pay more attention to its stability and safety, and carry out air tightness test for it, which is also one of the important indicators to ensure the safety of consumers. Hiris technology has provided many mature solutions for air tightness testing in the field of new energy vehicles, and has also made a major breakthrough in testing technology. This time, we will share the air tightness test case of new energy vehicle charging gun control box for your reference, hoping to be helpful to you.

(air tightness tester for control box of vehicle charging gun)

1、 Display of testing difficulties for control box of vehicle charging gun

1. The overall shape of the charging gun control box for the air tightness test is regular, wrapped with black waterproof shell material, and the front and rear ends are wires connecting external devices, so the overall precision is high;

(car charging gun control box)

2. Due to the high precision of the instrument, the wires at both ends of the front and back make it impossible to carry out the whole fixed detection, which is unfavorable to the direct detection, and it is unable to judge the air tightness of the charging gun control box through the gas leakage value.

2、 Demonstration of air tightness test process for control box of automobile charging gun

1. According to the special shape of the charging gun control box, Harris has specially customized a special mold. The whole mold is cast according to the overall shape of the charging gun control box. After the control box is put in, it is just clamped, and the front and rear ends of the butt wires are placed on the front and rear grooves of the mold, so that the upper and lower molds can be closed to form a closed space during detection;

(die details of air tightness test for control box of car charging gun)

2. Put the charging gun control box into the tooling die and connect it with our instrument. There is a valve island, gas tank and other parts inside the instrument and the program we set. After connecting, press the start button. 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 control box through the gas saturation inside the mold.

(details of air tightness test for control box of vehicle charging gun)

3. If the charging gun control box is not sealed, air leakage occurs. At this time, the leakage value display data in the instrument becomes larger and larger, and the pressure value drops. At this time, it can determine whether the charging gun control box is leaking, and the instrument test results will also show ng, which means that the air tightness test fails. If the test control box does not leak, the gas in the tooling die will be in a constant state after inflation, the pressure value and leakage value displayed on the instrument are also stable, and the test result of the instrument will display the word OK, indicating that the air tightness test has passed.

3、 Parameters of air tightness tester for control box of automobile charging gun

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