Energy storage system and control method thereof

An energy storage system, comprising:

• an energy storage cabinet body, configured to accommodate a battery module and including an air intake passage, and a first cabinet body air inlet and a second cabinet body air inlet that are in fluid communication with the air intake passage;
• a first filtering device, disposed at the first cabinet body air inlet;
• an air duct switch, disposed inside the air intake passage and between the first cabinet body air inlet and the second cabinet body air inlet, and configured to separate the air intake passage into a first air intake section in fluid communication with the first cabinet body air inlet and a second air intake section in fluid communication with the second cabinet body air inlet;
• a cooling unit, disposed inside the energy storage cabinet body and including a unit air inlet in fluid communication with the first air intake section;
• a first sensor, configured to detect a temperature inside the energy storage cabinet body;
• a second sensor, configured to detect a particulate matter concentration in an environment where the energy storage system is located;
• and
• a controller, electrically connected to each of the first sensor, the second sensor, and the air duct switch and configured to control opening and closing of the air duct switch according to the temperature detected by the first sensor and the particulate matter concentration detected by the second sensor.