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 manage-ment system and its simulation model are set up.By numerical simulation,the thermal management perfor-mance 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 differ-ence 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.
关键词
锂电池/储能系统/液冷热管理/调频
Key words
lithium ion battery/energy storage system/liquid cooling thermal management/frequency regulation
维普
万方数据