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Product testing of welding terminals
The quality of the soldered terminal is directly related to the safety and reliability of the product, which is a crucial connection component in the battery pack and various electronic equipment. In order to ensure that the performance of the welding terminal meets the design requirements and industry standards, rigorous product testing is essential. This paper will introduce the test purpose, test method and test standard of welding terminals.
Purpose of testing
Welding terminal product testing is mainly for the following purposes:
Ensure ELECTRICAL PERFORMANCE: VERIFY the ELECTRICAL conductivity, contact resistance and voltage resistance of the welding terminals to ensure that they can transfer current stably in actual use and prevent overheating and energy loss.
Evaluation of mechanical properties: tensile strength, vibration resistance and shear resistance of the welded terminals are tested to confirm their stability and reliability in the working environment, especially in high vibration and high load application scenarios.
Testing corrosion resistance: Environmental factors may affect the welded terminals over time, so it is important to evaluate the corrosion resistance and aging resistance of their materials.
Ensure safety: the welding terminal needs to have good insulation performance to prevent short circuit or leakage, so it is necessary to test its insulation strength and safety valve leakage current.
Test method
Electrical performance test
Contact resistance test: Use the four-wire method to measure the contact resistance of the welding terminal under different current carrying conditions to ensure that it does not appear too high resistance value at the rated current.
Withstand voltage test: By applying a voltage higher than the normal operating voltage, the insulation performance of the welding terminal is tested to determine whether it can withstand voltage impact.
Mechanical performance test
Tensile test: The solder terminal is clamped on a tensile testing machine to measure the maximum force value that it can withstand under tensile force to evaluate its stability.
Vibration test: simulate the vibration environment that the welding terminal may face in actual use, and evaluate its stability and durability at different frequencies and amplitudes.
Corrosion resistance test
Salt spray test: The welding terminal is placed in a specific salt spray environment, and the corrosion degree of its surface is observed and evaluated after a certain time to judge the corrosion resistance of its material.
Wet and hot testing: By exposing the welded terminals to high temperature and humidity, the long-term performance changes are evaluated, and the reliability of the material is tested in extreme environments.
Insulation performance test
Insulation strength test: By applying a certain voltage to the welding terminal, the bearing capacity of the insulation material is detected to ensure that it does not appear breakdown or leakage phenomenon.
Leakage current test: EVALUATE the leakage current of the welding terminal under normal operating conditions to confirm whether it meets the safety standards.
Test standards
The test of welding terminals needs to meet certain industry standards and specifications. Common test standards include:
International standards (IEC) : such as IEC 60529 (protection class), IEC 61215 (photovoltaic module), etc.
National standards (GB) : such as GB/T 19666 (basic performance of electrical connectors), etc. Industry standards: Some specific industries (such as automotive, aviation) will have special test standards for welding terminals.
conclusion
Product testing of welding terminals is an important part to ensure its quality and performance. Through systematic testing methods and strict standards, the electrical performance and mechanical reliability of welding terminals can be effectively evaluated, so as to ensure the safety and stability of final products. In the rapidly developing electronics industry, the quality control of welding terminals is particularly important, and continuous testing and verification is the key to achieve high-quality products. By continuously improving the testing technology and methods, manufacturers can better meet the market demand and enhance the competitiveness of products.
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