Here are some methods to query the certification status of charging piles:

1. **Through Official Websites**: Visit the official website of the National Certification and Accreditation Administration (CNCA). On the homepage, navigate through "Services" -> "Special Columns" -> "Compulsory Product Certification" -> "Public Query" to access the relevant section. Enter the certificate number and company name to retrieve CCC certification information. Additionally, you can log into the official websites of industry organizations such as the China Charging Infrastructure Promotion Alliance (CCIA) to check the list of certified charging pile manufacturers and their qualifications.

2. **Using Professional Platforms**: Platforms like "e桩" allow you to query certification details. Open the website, log in to your account, and enter the brand and model of the charging pile you wish to query in the search bar. After clicking "Search," relevant information will be displayed in the "Safety Certification" section of the charging pile's details page.

3. **Through Third-Party Testing Institution Websites**: Some professional third-party testing institutions, such as the China Automobile Technology Research Center (CATARC), publish information about qualified charging pile manufacturers and their products on their websites. You can consult these reports to understand the certification status of the charging piles.

4. **Check Electric Vehicle Manufacturers' Official Websites**: Well-known electric vehicle brands like BYD and Tesla list合作 charging pile manufacturers and their certifications on their official websites. You can refer to this information to understand the relevant certification details of the charging piles.