A thermal management system for a hydrogen fuel cell

Abstract

The present invention provides a hydrogen fuel cell thermal management system, including: a water pump, a thermostat, a deionizer, an intercooler, a PTC, a cooling module, a solenoid valve, a fuel cell and an expansion water tank. The above different components constitute a first circuit, a second circuit and a third circuit. According to different situations, the above three circuits work separately. The present invention can preheat the coolant before the fuel cell is started at low temperature, provide a better cooling effect during normal operation, and effectively improve the working efficiency of the fuel cell.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile manufacturing, and in particular to a hydrogen fuel cell thermal management system. Background Art

[0002] In the process of developing fuel cell engines, it is necessary to optimize the performance of the fuel cell system and improve the effective utilization of the fuel cell. This requires providing the fuel cell system with a more suitable temperature environment to work. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a hydrogen fuel cell thermal management system.

[0004] A hydrogen fuel cell thermal management system, comprising: a water pump, a thermostat, a deionizer, an intercooler, a PTC, a cooling module, a solenoid valve, a fuel cell and an expansion water tank;

[0005] The output end of the water pump is connected to the input end of the thermostat, the output end of the thermostat is connected to the input end of the cooling module, the first output end of the cooling module is connected to the first input end of the solenoid valve, the second output end of the cooling module is connected to the first input end of the expansion water tank, the first output end of the solenoid valve is connected to the input end of the intercooler, the output end of the intercooler is connected to the input end of the PTC, and the output end of the PTC is connected to the first input end of the water pump;

[0006] The thermostat is bidirectionally connected to the deionizer, the output end of the deionizer is connected to the second input end of the solenoid valve, the second output end of the solenoid valve is connected to the coolant inlet end of the fuel cell, the first output end of the coolant of the fuel cell is connected to the first input end of the water pump, the second output end of the coolant of the fuel cell is connected to the second input end of the expansion water tank, and the output end of the expansion water tank is connected to the second input end of the water pump.

[0007] Further, the water pump, thermostat, deionizer, solenoid valve, intercooler and PTC constitute a first circuit;

[0008] The water pump, thermostat, deionizer, solenoid valve and fuel cell constitute a second circuit;

[0009] The water pump, thermostat, cooling module, solenoid valve and fuel cell constitute a third circuit;

[0010] Furthermore, the first circuit is used to provide a start-up temperature for a cold start of the fuel cell, specifically:

[0011] When the ambient temperature and the coolant temperature are lower than the first preset temperature value, the coolant flows through the thermostat, the solenoid valve, the deionizer, the intercooler and the solenoid valve in sequence through the water pump, and then the coolant is heated by the PTC to make the temperature of the coolant reach the first preset temperature range, thereby providing a starting temperature for the cold start of the fuel cell; the starting temperature is the temperature of the coolant

[0012] Further, the first preset temperature value is 0°C, and the first preset temperature range is 60-80°C;

[0013] Furthermore, the second circuit is used to cool the fuel cell, specifically:

[0014] After the fuel cell is started normally, it will generate a certain amount of heat. At this time, the fuel cell needs to be cooled. That is, the coolant flows through the thermostat, deionizer, solenoid valve and fuel cell in sequence by the water pump, and the heat generated by the fuel cell is taken away by the coolant;

[0015] Furthermore, the third circuit is used to cool the coolant, specifically:

[0016] After the fuel cell runs for a period of time, it will generate a lot of heat, causing the coolant temperature to rise. At this time, the coolant needs to be cooled down, that is, the coolant flows through the thermostat, cooling module, solenoid valve and fuel cell in sequence by the water pump, so as to take away the heat generated by the fuel cell through the coolant;

[0017] Furthermore, the working principle of the hydrogen fuel cell thermal management system is as follows:

[0018] When the ambient temperature and the coolant temperature are lower than the first preset temperature value, the first circuit starts to work, so that the coolant temperature reaches the first preset temperature range;

[0019] When the coolant temperature reaches a first preset temperature range, the second circuit starts to work and the first circuit is closed; when it is detected that the coolant temperature is greater than a second preset temperature, the third circuit starts to work and the second circuit is closed;

[0020] When it is detected that the coolant temperature is lower than the second preset temperature range, the second circuit starts to work and the third circuit is closed;

[0021] Furthermore, the second preset temperature value is 90°C, and the second preset temperature range is 60-80°C.

[0022] The technical solution provided by the present invention has the beneficial effect of enabling the fuel cell to preheat the coolant before starting at low temperature, providing a better cooling effect during normal operation, and effectively improving the working efficiency of the fuel cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0024] Figure 1 It is a schematic diagram of a hydrogen fuel cell thermal management system in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0026] An embodiment of the present invention provides a hydrogen fuel cell thermal management system.

[0027] Please refer to Figure 1 , Figure 1 Schematic diagram of a hydrogen fuel cell thermal management system according to an embodiment of the present invention, comprising: a water pump 1, a thermostat 2, a deionizer 3, an intercooler 4, a PTC 5, a cooling module 6, a solenoid valve 7, a fuel cell 8 and an expansion water tank 9; Figure 1 In the figure, 10 is the pipeline, and 11 is the auxiliary pipeline;

[0028] The output end of the water pump 1 is connected to the input end of the thermostat 2, the output end of the thermostat 2 is connected to the input end of the cooling module 6, the first output end of the cooling module 6 is connected to the first input end of the solenoid valve 7, the second output end of the cooling module 6 is connected to the first input end of the expansion water tank 9, the first output end of the solenoid valve 7 is connected to the input end of the intercooler 4, the output end of the intercooler 4 is connected to the input end of the PTC5, and the output end of the PTC5 is connected to the first input end of the water pump 1;

[0029] The thermostat 2 is bidirectionally connected to the deionizer 3, the output end of the deionizer 3 is connected to the second input end of the solenoid valve 7, the second output end of the solenoid valve 7 is connected to the coolant inlet end of the fuel cell 8, the first output end of the coolant of the fuel cell 8 is connected to the first input end of the water pump 1, the second output end of the coolant of the fuel cell 8 is connected to the second input end of the expansion water tank 9, and the output end of the expansion water tank 9 is connected to the second input end of the water pump 1;

[0030] The water pump 1 is used to provide power for the circulation of the coolant;

[0031] The thermostat 2 is used to automatically adjust the water volume according to the temperature of the coolant;

[0032] The deionizer 3 is used to remove conductive ions in the coolant;

[0033] The intercooler 4 is used to cool the air, and lowers the temperature of the compressed air through heat exchange between the coolant and the air, so that the temperature of the air entering the fuel cell is within a reasonable range;

[0034] The PTC5 is used to heat the coolant;

[0035] The cooling module 6 is used to cool the coolant;

[0036] The fuel cell 8 is used to provide a place for the reaction between hydrogen and oxygen in the air;

[0037] The expansion water tank 9 is used to store coolant; wherein the coolant is water;

[0038] The water generated by the reaction in the fuel cell 8 will flow back to the expansion water tank 9, and at the same time, the excess coolant in the cooling module 6 will also flow back to the expansion water tank 9;

[0039] The water pump 1, the thermostat 2, the deionizer 3, the solenoid valve 7, the intercooler 4 and the PTC 5 constitute a first circuit; the first circuit is used to provide a starting temperature for the cold start of the fuel cell 8, specifically:

[0040] When the ambient temperature and the coolant temperature are lower than 0°C, the coolant flows from the water pump 1 through the thermostat 2, the deionizer 3, the solenoid valve 7 and the intercooler 4 in sequence, and then is heated by the PTC 5 to make the coolant temperature reach 60-80°C, thereby providing a starting temperature for the cold start of the fuel cell 8; the starting temperature is the temperature of the coolant.

[0041] The water pump 1, the thermostat 2, the deionizer 3, the solenoid valve 7 and the fuel cell 8 constitute a second circuit; the second circuit is used to cool the fuel cell 8, specifically:

[0042] After the fuel cell 8 is started normally, a certain amount of heat will be generated. At this time, the fuel cell needs to be cooled, that is, the coolant flows from the water pump 1 through the thermostat 2, the deionizer 3, the solenoid valve 7 and the fuel cell 8 in sequence, and the heat generated by the fuel cell 8 is taken away by the coolant;

[0043] The water pump 1, the thermostat 2, the cooling module 6, the solenoid valve 7 and the fuel cell 8 constitute a third circuit;

[0044] The third circuit is used to cool the coolant, specifically:

[0045] After the fuel cell has been running for a period of time, a large amount of heat will be generated, causing the temperature of the coolant to rise. At this time, the coolant needs to be cooled, that is, the coolant flows from the water pump 1 through the thermostat, cooling module 6, solenoid valve 7 and fuel cell 8 in sequence, so that the heat generated by the fuel cell is taken away by the coolant.

[0046] The working principle of the hydrogen fuel cell thermal management system is as follows:

[0047] When the outside and coolant temperatures are below 0°C, the first circuit starts to work, making the coolant temperature reach 60-80°C;

[0048] When the coolant temperature reaches 60-80°C, the second circuit starts to work and the first circuit is closed. When the coolant temperature is detected to be greater than 90°C, the third circuit starts to work and the second circuit is closed.

[0049] When the coolant temperature is detected to be lower than 60-80°C, the second circuit starts to work and the third circuit is closed.

[0050] The beneficial effects of the present invention are: it can preheat the coolant before the fuel cell is started at a low temperature, provide a better cooling effect during normal operation, and effectively improve the working efficiency of the fuel cell.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydrogen fuel cell thermal management system, characterized in that: include: A water pump (1), a thermostat (2), a deionizer (3), an intercooler (4), a PTC (5), a cooling module (6), a solenoid valve (7), a fuel cell (8) and an expansion tank (9); The output end of the water pump (1) is connected to the input end of the thermostat (2), the output end of the thermostat (2) is connected to the input end of the cooling module (6), the first output end of the cooling module (6) is connected to the first input end of the solenoid valve (7), the second output end of the cooling module (6) is connected to the first input end of the expansion water tank (9), the first output end of the solenoid valve (7) is connected to the input end of the intercooler (4), the output end of the intercooler (4) is connected to the input end of the PTC (5), and the output end of the PTC (5) is connected to the first input end of the water pump (1); The thermostat (2) is bidirectionally connected to the deionizer (3); the output end of the deionizer (3) is connected to the second input end of the solenoid valve (7); the second output end of the solenoid valve (7) is connected to the coolant inlet end of the fuel cell (8); the first output end of the coolant of the fuel cell (8) is connected to the first input end of the water pump (1); the second output end of the coolant of the fuel cell (8) is connected to the second input end of the expansion water tank (9); and the output end of the expansion water tank (9) is connected to the second input end of the water pump (1); The water pump (1), the thermostat (2), the deionizer (3), the solenoid valve (7), the intercooler (4) and the PTC (5) constitute a first circuit; The water pump (1), the thermostat (2), the deionizer (3), the solenoid valve (7) and the fuel cell (8) constitute a second circuit; The water pump (1), the thermostat (2), the cooling module (6), the solenoid valve (7) and the fuel cell (8) constitute a third circuit; The first circuit is used to provide a starting temperature for a cold start of the fuel cell (8), specifically: When the temperature of the outside and the coolant is lower than a first preset temperature value, the coolant flows from the water pump (1) through the thermostat (2), the deionizer (3), the solenoid valve (7), and the intercooler (4) in sequence, and then is heated by the PTC (5) so that the temperature of the coolant reaches a first preset temperature range, thereby providing a starting temperature for the cold start of the fuel cell (8); the starting temperature is the temperature of the coolant; The second circuit is used to cool the fuel cell, specifically: After the fuel cell is started normally, a certain amount of heat will be generated. At this time, the fuel cell needs to be cooled. That is, the coolant flows from the water pump (1) through the thermostat (2), the deionizer (3), the solenoid valve (7) and the fuel cell (8) in sequence, and the heat generated by the fuel cell is taken away by the coolant.

2. A hydrogen fuel cell thermal management system as claimed in claim 1, characterized in that: The first preset temperature value is 0°C, and the first preset temperature range is 60-80°C.

3. A hydrogen fuel cell thermal management system as claimed in claim 1, characterized in that: The third circuit is used to cool the coolant, specifically: After the fuel cell has been running for a period of time, a large amount of heat is generated, causing the temperature of the coolant to rise. At this time, the coolant needs to be cooled, that is, the coolant flows from the water pump (1) through the thermostat (2), the cooling module (6), the solenoid valve (7) and the fuel cell (8) in sequence, so that the heat generated by the fuel cell (8) is taken away by the coolant.

4. A hydrogen fuel cell thermal management system as claimed in claim 1, characterized in that: The working principle of the hydrogen fuel cell thermal management system is as follows: When the ambient temperature and the coolant temperature are lower than the first preset temperature value, the first circuit starts to work, so that the coolant temperature reaches the first preset temperature range; When the coolant temperature reaches a first preset temperature range, the second circuit starts to work and the first circuit is closed; when it is detected that the coolant temperature is greater than a second preset temperature, the third circuit starts to work and the second circuit is closed; When it is detected that the coolant temperature is lower than the second preset temperature range, the second circuit starts to work and the third circuit is closed.

5. A hydrogen fuel cell thermal management system as claimed in claim 4, characterized in that: The second preset temperature value is 90°C, and the second preset temperature range is 60-80°C.

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