What is the effect of the battery repair machine for electric vehicles produced by Teyuan? Is it a national patent technology?

After entering Teyuan's website, I saw that his company has a battery maintenance model shop in Nanchang, and there are photos of other franchise stores online. Judging from the survival of these stores, the repair effect of his company should be good, otherwise his model store will not be able to operate. The patent was checked on the website of the Intellectual Property Office, and it is true. But this alone cannot prove the repair effect. If you want to do this industry, you'd better go to his company to see if his model shop is profitable.