According to information from Tianyancha, Contemporary Amperex Technology Co. Limited (CATL) has been granted a patent titled 'Estimation Method, Device, and Battery Management System for Battery Pack Power Limit', with the authorization announcement number CN116324445B. The authorization was officially announced on October 17, 2025, following a patent application submitted on March 4, 2021.

The patent abstract reveals that this innovation introduces a refined estimation method for determining the peak power capacity of a battery pack. The process entails calculating the battery pack's discharge and charge power limit values by taking into account the state of charge of individual cells and the overall battery pack temperature. Additionally, it involves identifying the minimum and maximum voltage values across the cells and establishing discharge and charge peak power limit coefficients based on predefined voltage limit criteria. Ultimately, these factors are utilized to compute the precise discharge and charge peak power of the battery pack.

This advanced method significantly enhances the accuracy of estimating cell peak power while effectively mitigating the risks associated with undervoltage and overvoltage conditions.