The testing methods for the production and repair of electric vehicle chargers are as follows:

　　Reliability testing. Product testing includes raw material inspection, semi-finished product testing, finished product aging testing, reliability testing, etc., to ensure product quality and service life.

　　Electronic load. During production and repair, electronic loads are used instead of battery packs, and the size of the electronic loads is adjusted through potentiometers to simulate the nearly 10 hour charging process of the battery pack, quickly preparing to detect whether the various parameters of the charger meet the standards and are accurate.

　　Charger tester. Use a specialized charger tester to test, which uses an electronic load (which can be understood as an analog battery pack). Adjust the size of the electronic load through a potentiometer, so that one electronic load can detect chargers of various models and specifications.

　　Appearance inspection: Check whether the appearance of the charger is damaged, such as whether there are cracks or other mechanical damages on the shell, and whether the interface is oxidized, corroded, etc.

　　Functional testing: Check if the charger is functioning properly. For example, checking whether the output voltage and current of the charger meet the requirements, and whether it can charge the battery.

　　Durability test: Test the service life of the charger. For example, perform multiple charge and discharge cycles on the charger to test its durability.

　　Safety performance test: Test the safety performance of the charger. For example, check if the charger has protection functions such as overheating, overcurrent, and overvoltage to prevent safety issues during use.

　　Environmental adaptability test: Test the adaptability of the charger in different environments. For example, testing the charger at different temperatures, humidity, and air pressure to verify its environmental adaptability.

　　Compatibility testing: Testing whether the charger is compatible with different batteries. For example, charging batteries of different brands, models, and capacities to test the compatibility of the charger.

　　These are the commonly used testing methods in the production and repair of electric vehicle chargers. Through these testing methods, it can be ensured that the charger meets the expected standards in terms of performance, safety, and reliability.

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