Power conversion system and energy storage system

A power conversion system, comprising:

• a tank provided with a first cavity and a second cavity that are separated from each other;
• a heat exchange member arranged in the second cavity, the heat exchange member having a heat exchange channel, the heat exchange channel having an air inlet and an air outlet in communication with each other, and both the air inlet and the air outlet being in communication with the first cavity;
• and
• a first airflow generator arranged in the first cavity and/or the second cavity;
• the first airflow generator being configured to input gas located in the first cavity into the heat exchange channel via the air inlet, and output gas located in the heat exchange channel into the first cavity via the air outlet;
• wherein the heat exchange member comprises a plurality of heat exchange bodies, the heat exchange bodies are provided with heat exchange sub-channels, all the heat exchange sub-channels form the heat exchange channel, inlets of all the heat exchange sub-channels define the air inlet, and outlets of all the heat exchange sub-channels define the air outlet;
• and all the heat exchange bodies are sequentially arranged along a direction in which the first cavity points to the second cavity.