Industry Solutions | Automotive Battery Air Tightness Solutions

Air tightness testing is an important quality control method, which is mainly used to check whether the product has good sealing performance to prevent the leakage of internal gas or liquid. The following are some of the main reasons for air tightness testing:

1. Ensure product safety: Products with good airtightness can prevent the leakage of internal gas or liquid, and avoid safety accidents caused by leakage. For example, in automobile manufacturing, airtightness testing can ensure the sealing performance of key components such as fuel tanks and brake systems to ensure driving safety.
2. Improve product quality: Airtightness testing can promptly detect defects in the product during the production process, such as damaged seals, poor welding, etc., so that timely repairs or replacements can be made to improve product quality.
3. Extend product life: Good airtightness effectively prevents erosion and pollution from the external environment, reduces the risk of damage to internal components of the product, and thus extends the service life of the product.
4. Meet industry standards and regulatory requirements: Many industry standards and regulations have clear requirements for the air tightness of products. Through air tightness testing, companies can ensure that their products meet relevant standards and regulatory requirements and avoid legal risks due to violations.
5. Advances in technology and methods: With the continuous advancement of science and technology, airtightness testing technology is also developing. Choosing appropriate testing equipment and methods can improve the efficiency and accuracy of testing.

In summary, airtightness testing is crucial to ensuring product safety, quality and reliability, and it is an indispensable link in modern industrial production.

2. Why do we need to do air tightness testing?

Battery pack air tightness test:

In order to protect the internal components of the battery pack from dust and rain, the dust and water protection level of the battery pack is generally required to reach IP67 or IP68. The purpose and significance of the airtightness test is to detect the sealing performance of the battery pack to ensure that it will not leak during use, thereby ensuring the safety and reliability of the battery.

Liquid cooling plate air tightness test:

There is a large amount of electrolyte inside the liquid cooling plate. If the airtightness is not good, external moisture and harmful gases will enter the battery, causing the electrolyte composition inside the battery to change, thereby affecting the battery performance and life.

In addition to the above-mentioned air tightness tests, air tightness is a very important quality indicator in some high-pressure environments or situations where gas leakage needs to be prevented, and air tightness tests are required.

3. Principle of air tightness detection

Use the airtightness leak tester to fill the battery pack cavity with dry, clean and impurity-free gas, then start to detect the internal air pressure change after a period of balanced pressure maintenance, and finally detect the air pressure drop or gas leakage flow. If the pressure drops by more than the set standard value within a certain period of time, and the air pressure drop/gas leakage flow also exceeds the set value, the airtightness of the tested product is considered unqualified; otherwise, the airtightness of the tested product is considered qualified.

4. Air tightness test tooling

Air tightness testing requires the use of air tightness testing tooling . Leave an air injection port on the air tightness testing tooling, and the air tightness leak tester injects air through this test port. Our company supports the customization of air tightness testing tooling.