Aiming at the frequency fluctuation due to the massive access of wind and solar energy to the grid

an energy storage system combining power-type lithium battery and liquid cooling thermal management is proposed. The electrical and thermal characteristics of the power type lithium battery are obtained based on the experimental tests. The results show that only with the natural convection heat dissipation cannot meet the proper operating temperature of the battery under high rate conditions. The liquid cooling thermal management system and its simulation model are set up. By numerical simulation

the thermal management performance of the system and the thermal behavior of the battery are analyzed under 4C rate discharge

different flow rates and actual AGC frequency regulation conditions. The research shows that the temperature difference between batteries is less than 2℃ and the maximum temperature is less than 33℃ under the actual AGC frequency regulation condition. It proves that the liquid-cooled thermal management scheme can realize the long-term stable operation of the energy storage system under high rate frequency regulation conditions.