According to the announcement of the State Intellectual Property Office, TianNeng Battery Group Co., Ltd. has applied for a patent titled "A method for adding acid to lead-acid batteries", with the publication number CN117578045A and the application date of November 2023.

The patent abstract shows that the invention discloses a method for adding acid to lead-acid batteries, involving the technical field of lead-acid batteries. The invention provides a method for adding acid to lead-acid batteries, which solves the problem of excessive temperature rise by using pre-cooling lead-acid batteries and acid solutions, ensuring that the electrode group is in a good temperature environment during the process of adding acid and formation, facilitating material conversion and eliminating adverse effects caused by excessive temperature rise. The invention has high production efficiency, operability, and improved battery formation effect, significantly enhancing the comprehensive performance of the battery, especially in low temperature and cycle life.