Cooling device of fuel cell
By introducing a circulating water tank and insulated water pump into the fuel cell system, the insulation performance is improved by using secondary heat exchange, and the influence of the external environment on the insulation performance is solved, and the stable heat dissipation of the system is achieved under a variable environment.
Patent Information
- Application Number
- CN202422443581.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-10-10
AI Technical Summary
In the case of rain or high air humidity, the floating measures in the existing fuel cell system fail, resulting in a sudden drop in insulation performance and unable to adapt to the changing external environment.
Design a fuel cell cooling device, adopting a circulating water tank and an insulated water pump, improve the insulation performance through secondary heat exchange, use deionized water or coolant as the circulation medium, and use silicone tubes and insulating materials in the pipeline to ensure that the insulation performance is not affected by external factors.
Without affecting the heat dissipation ability, the insulation performance of the overall system is improved, the influence of external environmental factors on the insulation performance is avoided, and the stable operation of the system is ensured.
Smart Images
Figure CN223296841U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fuel cells, in particular to a cooling device for fuel cells. Background Art
[0002] At present, in the process of fuel cell system design, the main water circuit for cooling the stack is often connected to the radiator through two water pipes, one inlet and one outlet, from the fuel cell system, and then a cooling fan is used to blow the radiator head-on, such as Figure 2 As shown, the water or coolant leaving the battery stack is at a higher temperature and flows to the radiator inlet. When flowing through the radiator, the cooling fan is used to blow the water to reduce the water temperature, and then it enters the fuel-electric system from the radiator outlet. Then, the water or coolant with a lower temperature enters the battery stack to cool the battery stack. However, the fuel-electric system has a characteristic that the cooling water path of the battery stack is connected to the electrode. Therefore, deionized water with lower conductivity or a dedicated coolant is required to prevent the electrode from being directly connected to the outside. The main water path also needs to be grounded or even floated at the far end as much as possible to improve the insulation performance. However, this cannot be applied to all scenarios. Once it rains or the air humidity is high, measures such as floating ground will fail and the insulation performance will drop sharply. Summary of the Invention
[0003] The utility model provides a cooling device for a fuel cell in order to overcome the deficiencies of the prior art.
[0004] To achieve the above-mentioned objectives, a fuel cell cooling device is designed, comprising a fuel cell system and a radiator. A circulating water tank is provided between the fuel cell system and the radiator, the circulating water tank being filled with a circulating medium, and a water-cooling plate 1 and a water-cooling plate 2 being arranged opposite each other in the circulating water tank. One end of the water-cooling plate 1 is connected to the cooling water inlet of the fuel cell system via a pipe, and the other end of the water-cooling plate 1 is connected to the cooling water outlet of the fuel cell system via a pipe. One end of the water-cooling plate 2 is connected to the radiator inlet via a pipe, and one end of the water-cooling plate 2 is connected to the radiator outlet via a pipe. The inlet and outlet of the circulating water tank are connected via an insulated water pump 1, and an insulated water pump 2 is provided on the pipe connecting the water-cooling plate 2 and the radiator.
[0005] The circulating medium is deionized water or coolant.
[0006] The pipes connecting the water-cooling plate 1 and the fuel cell system, and the pipes connecting the water-cooling plate 2 and the radiator are both made of silicone tubes.
[0007] The material of the circulating water tank is insulating material.
[0008] The radiator is provided with a cooling medium, and the cooling medium is selected from deionized water or coolant.
[0009] A cooling fan is provided on one side of the radiator.
[0010] Compared with the existing technology, the utility model is improved on the basis of the existing structure and is easy to process. A primary heat exchange device is added, and the insulation performance of the entire system is improved as much as possible without affecting the heat dissipation capacity through a secondary heat exchange method, and is not affected by external environmental factors such as rain. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural diagram of the present utility model.
[0012] Figure 2 This is a schematic diagram of the structure before the improvement of the utility model DETAILED DESCRIPTION
[0013] The present invention will be further described below with reference to the accompanying drawings.
[0014] like Figure 1 As shown, a circulating water tank 2 is provided between the fuel cell system 1 and the radiator 3, and the circulating water tank 2 is filled with a circulating medium 4. A water-cooling plate 1 5 and a water-cooling plate 2 6 are provided in the circulating water tank 2 and are arranged opposite to each other. One end of the water-cooling plate 1 5 is connected to the cooling water inlet of the fuel cell system 1 through a pipe, and the other end of the water-cooling plate 1 5 is connected to the cooling water outlet of the fuel cell system 1 through a pipe. One end of the water-cooling plate 2 6 is connected to the inlet of the radiator 3 through a pipe, and one end of the water-cooling plate 2 6 is connected to the outlet of the radiator 3 through a pipe. The inlet and outlet of the circulating water tank 2 are connected by an insulated water pump 1 7, and an insulated water pump 2 8 is provided on the pipe connecting the water-cooling plate 2 6 and the radiator 3.
[0015] The circulating medium 4 is deionized water or coolant, which is used as a mass transfer medium for heat conduction.
[0016] The pipes connecting the water-cooling plate 1 5 and the fuel cell system 1 and the pipes connecting the water-cooling plate 2 6 and the radiator 3 are both made of silicone tubes to enhance insulation performance.
[0017] The radiator is provided with a cooling medium, and the cooling medium is selected from deionized water or coolant.
[0018] During specific use, the material of the circulating water tank 2 is selected to be insulating and high-temperature resistant.
[0019] A cooling fan 9 is provided on one side of the radiator 3 , and the cooling fan 9 blows through the radiator 3 to lower the temperature of the water or coolant flowing through the radiator 3 .
[0020] Insulated water pump 1 (7) ensures the medium in circulating water tank 2 circulates and evenly conducts heat. Insulated water pump 2 (8) ensures the cooling medium in radiator 3 circulates between radiator 3 and water-cooling plate 2 (6), providing cooling. In actual use, the insulated water pumps are purchased. Insulated partitions are installed between the pump heads of insulated water pumps 1 (7) and 2 (8) and the water pump motor, preventing the medium in the pump heads from being grounded due to the grounding of the water pump motor housing.
[0021] During operation of the present invention, when the fuel cell system 1 is in operation, the higher-temperature water or coolant flowing out of the stack flows to the water-cooled plate 1 5. Under the action of the insulated water pump 2 8, the water or coolant in the radiator 3 flows to the water-cooled plate 2 6. Under the action of the insulated water pump 1 7, the circulating medium 4 in the circulating water tank 2 circulates continuously, transferring the heat in the water-cooled plate 1 5 to the circulating medium 4 through heat exchange, thereby lowering the temperature of the water or coolant flowing through the water-cooled plate 1 5. This water or coolant then flows into the stack to absorb heat, thereby lowering the temperature of the stack. The heat of the circulating medium 4 in the circulating water tank 2 is then transferred to the water-cooled plate 2 6, causing the temperature of the water or coolant flowing through the water-cooled plate 2 6 to increase. This water or coolant then flows into the radiator 3, and is blown by the cooling fan 9, lowering the temperature of the water or coolant flowing through the radiator 3. This process is repeated continuously, thus achieving the function of cooling the stack.
[0022] In the present invention, the radiator 3 and the fuel cell stack do not belong to the same water circuit. The heat in the fuel cell stack is transferred to the radiator 3 by heat conduction, and the circulating medium 4 is deionized water or special coolant with low electrical conductivity. The circulating water tank 2 is also made of insulating material. Therefore, in this state, even if the radiator 3 is directly grounded or grounded due to external factors, it will not have a significant impact on the overall insulation performance of the fuel cell system 1.
[0023] In the present invention, the water-cooled coolant flowing through the fuel cell stack is not directly connected to the radiator. Therefore, whether the floating grounding measure of the radiator fails due to external reasons or the radiator is directly grounded, the influence on the insulation performance of the entire system is reduced.
Claims
1. A fuel cell cooling device, comprising a fuel cell system and a radiator, characterized in that: A circulating water tank (2) is provided between the fuel cell system (1) and the radiator (3), and a circulating medium (4) is filled in the circulating water tank (2). A water-cooling plate 1 (5) and a water-cooling plate 2 (6) are provided in the circulating water tank (2) and are arranged opposite to each other. One end of the water-cooling plate 1 (5) is connected to the cooling water inlet of the fuel cell system (1) through a pipeline, and the other end of the water-cooling plate 1 (5) is connected to the cooling water outlet of the fuel cell system (1) through a pipeline. One end of the water-cooling plate 2 (6) is connected to the inlet of the radiator (3) through a pipeline, and one end of the water-cooling plate 2 (6) is connected to the outlet of the radiator (3) through a pipeline. The inlet and outlet of the circulating water tank (2) are connected through an insulating water pump 1 (7), and an insulating water pump 2 (8) is provided on the pipeline connecting the water-cooling plate 2 (6) and the radiator (3).
2. A fuel cell cooling device according to claim 1, characterized in that: The circulating medium (4) is deionized water or cooling liquid.
3. The cooling device for a fuel cell according to claim 1, wherein: The pipes connecting the water cooling plate 1 (5) and the fuel cell system (1) and the pipes connecting the water cooling plate 2 (6) and the radiator (3) are both made of silicone tubes.
4. The fuel cell cooling device according to claim 1, characterized in that: The material of the circulating water tank (2) is insulating material.
5. The fuel cell cooling device according to claim 1, characterized in that: The radiator (3) is provided with a cooling medium, and the cooling medium is selected from deionized water or coolant.
6. A fuel cell cooling device according to claim 1 or 5, characterized in that: A cooling fan (9) is provided on one side of the radiator (3).