Thermal management system of ship composite energy power system and control method thereof

A thermal management system of a ship composite energy power system, comprising a thermal management circuit, wherein the thermal management circuit comprises a seawater heat exchange circuit, an internal combustion engine thermal management circuit, a hydrogen fuel cell thermal management circuit, a power battery and accessories thermal management circuit;

• the seawater heat exchange circuit is configured to dissipate heat with the internal combustion engine thermal management circuit, the hydrogen fuel cell thermal management circuit, and the power battery and accessories thermal management circuit;
• the internal combustion engine thermal management circuit is configured to control the internal combustion engine to operate at a suitable temperature and provide heat for the hydrogen fuel cell thermal management circuit;
• the hydrogen fuel cell thermal management circuit is configured to maintain the hydrogen fuel cell at a suitable temperature, assist in cooling the internal combustion engine thermal management circuit, and increase the temperature of the power battery and accessories thermal management circuit;
• and the power battery and accessories thermal management circuit is configured to maintain the power battery and auxiliary components at a suitable operating temperature;
• the seawater heat exchange circuit comprises a first heat exchanger, a second heat exchanger, a third heat exchanger, a seawater inlet, a seawater outlet, and pipelines connecting various components;
• and the seawater inlet, the first heat exchanger, the second heat exchanger, the third heat exchanger, and the seawater outlet are sequentially connected through the pipelines;
• the internal combustion engine thermal management circuit comprises an internal combustion engine, the first heat exchanger, a fourth heat exchanger, a first water pump, a first expansion water tank, and a first electromagnetic three-way valve;
• the internal combustion engine, the first water pump, the first heat exchanger, the first electromagnetic three-way valve, the fourth heat exchanger, and the first expansion water tank form a closed loop through the pipelines, and the first electromagnetic three-way valve is connected to the first water pump through the pipelines;
• the first water pump is configured to drive coolant in the internal combustion engine thermal management circuit to flow, taking away heat generated during operation of the internal combustion engine;
• the first expansion water tank is configured to ensure timely discharge of air inside the internal combustion engine thermal management circuit;
• the first heat exchanger is configured to exchange heat between the internal combustion engine thermal management circuit and the seawater heat exchange circuit;
• the fourth heat exchanger configured to exchange heat between the internal combustion engine thermal management circuit and the hydrogen fuel cell thermal management circuit;
• and the first electromagnetic three-way valve is configured to adjust heat dissipation;
• the hydrogen fuel cell thermal management circuit comprises a hydrogen fuel cell, the second heat exchanger, the fourth heat exchanger, a fifth heat exchanger, a second water pump, a second expansion water tank, an electric heater, and a second electromagnetic three-way valve;
• the hydrogen fuel cell, the second expansion water tank, the second heat exchanger, the fifth heat exchanger, the second electromagnetic three-way valve, and the second water pump form a closed loop through the pipelines;
• the hydrogen fuel cell, the second expansion water tank, the fourth heat exchanger, the electric heater, the second electromagnetic three-way valve, and the second water pump form another closed loop through the pipelines;
• the second water pump is configured to drive coolant in the hydrogen fuel cell thermal management circuit to flow, ensuring heat circulation and reducing the temperature difference between an inlet and an outlet of the hydrogen fuel cell;
• the second expansion water tank is configured to ensure timely discharge of air inside the hydrogen fuel cell thermal management circuit;
• the second heat exchanger is configured to exchange heat between the hydrogen fuel cell thermal management circuit and the seawater heat exchange circuit;
• the fourth heat exchanger is configured to exchange heat between the hydrogen fuel cell thermal management circuit and the internal combustion engine thermal management circuit;
• the electric heater is configured to increase temperature of coolant flowing through the electric heater;
• the fifth heat exchanger is configured to exchange heat between the hydrogen fuel cell thermal management circuit and the power battery and accessories thermal management circuit, reducing temperature of coolant flowing through the fifth heat exchanger in the hydrogen fuel cell thermal management circuit, and increasing temperature of coolant flowing through the fifth heat exchanger in the power battery and accessories thermal management circuit;
• and the second electromagnetic three-way valve is configured to regulate heat dissipation;
• the power battery and accessories thermal management circuit comprises the power battery, a controller, the third heat exchanger, the fifth heat exchanger, a third water pump, a third expansion water tank, and a third electromagnetic three-way valve;
• the power battery, the controller, the third heat exchanger, the third electromagnetic three-way valve, and the third water pump form a closed loop through the pipelines;
• the power battery, the controller, the fifth heat exchanger, the third expansion water tank, the third electromagnetic three-way valve, and the third water pump form another closed loop through the pipelines;
• the third water pump is configured to drive coolant in the power battery and accessories thermal management circuit to flow, ensuring heat circulation;
• the third expansion water tank is configured to ensure to timely discharge of air inside the power battery and accessories thermal management circuit;
• the third heat exchanger is configured to exchange heat between the power battery and accessories thermal management circuit and the seawater heat exchange circuit, reducing temperature of coolant flowing through the third heat exchanger;
• the fifth heat exchanger is configured to exchange heat between the power battery and accessories thermal management circuit and the fuel cell thermal management circuit, increasing the temperature of the coolant flowing through the fifth heat exchanger;
• and the third electromagnetic three-way valve is configured to regulate heat dissipation.