Hydrogen fuel power generation device thermal management system and hydrogen fuel power generation device thereof

Abstract

The utility model discloses a hydrogen fuel power generation device thermal management system and a hydrogen fuel power generation device thereof, and belongs to the field of hydrogen fuel power generation. Comprising a first cooling loop and a second cooling loop. The first cooling loop passes through the main radiator, the main circulating pump, the electric pile and the intercooler; and the second cooling loop passes through the auxiliary radiator, the auxiliary circulating pump, the electrical module and the electric pile accessory. According to the utility model, the most critical electric pile with the maximum thermal load is directly managed through the first cooling loop, and the electric pile is ensured to work in the most suitable temperature range. And the temperature of other auxiliary equipment and electronic components is controlled through the second cooling loop, so that the temperature control requirements of different components can be met, and the complexity and occupied space of the system can be reduced as much as possible.

Description

Technical Field

[0001] The utility model belongs to the field of hydrogen fuel power generation, in particular to a thermal management system for a hydrogen fuel power generation device and the hydrogen fuel power generation device. Background Art

[0002] As an advanced energy solution, the fuel cell power generation device can provide reliable power supply for various application scenarios, including remote areas, temporary facilities, etc., providing reliable power supply for these places. Through a highly integrated design, the system has achieved a reduction in volume and an improvement in performance, making it more competitive in practical applications.

[0003] As a powertrain application, the fuel cell power generation device is composed of a variety of components inside, involving various heat-generating elements, such as the fuel cell stack, various electrical components, and auxiliary function devices. Since there are significant differences in the heat generated by each high heat-generating element and its requirements for the normal operating temperature, if only a single cooling circuit is set, some heat-generating elements will not be able to work at the normal operating temperature, thus affecting the normal performance of the hydrogen fuel cell power generation system. If multiple cooling circuits are set, it will affect the integration degree and space utilization rate of the fuel cell power generation device. Therefore, it is particularly important to design a thermal management system for the fuel cell power generation device. Summary of the Utility Model

[0004] In order to overcome the above technical defects, the utility model provides a thermal management system for a hydrogen fuel power generation device and the hydrogen fuel power generation device to solve the problems involved in the background art.

[0005] The utility model provides a thermal management system for a hydrogen fuel power generation device, including:

[0006] A first cooling circuit, passing through the main radiator, the main circulation pump, the fuel cell stack, and the intercooler; the outlet of the main radiator is connected to the inlet of the main circulation pump, and the outlet of the main circulation pump is divided into two paths, respectively connected to the coolant inlets of the fuel cell stack and the intercooler, and the coolant outlets of the intercooler and the fuel cell stack are connected to the inlet of the main radiator;

[0007] A second cooling circuit, passing through the auxiliary radiator, the auxiliary circulation pump, the electrical module, and the fuel cell stack accessories; the outlet of the auxiliary radiator is connected to the inlet of the auxiliary circulation pump, and the outlet of the auxiliary circulation pump is divided into two paths, respectively connected to the coolant inlets of the electrical module and the fuel cell stack accessories, and the coolant outlets of the electrical module and the fuel cell stack accessories are connected to the inlet of the auxiliary radiator.

[0008] Preferably or optionally, the electrical module includes: a first boost DC module for supplying power to internal devices and a second boost DC module for supplying power to external devices;

[0009] One path of the second cooling circuit sequentially passes through the second boost DC module and the first boost DC module.

[0010] Preferably or optionally, the stack accessories include: an air compressor and a hydrogen circulation pump;

[0011] The other path of the second cooling circuit is further divided into two paths. One path sequentially passes through the air compressor controller and the air compressor; the other path passes through the hydrogen circulation pump controller.

[0012] Preferably or optionally, the first cooling circuit further includes: a thermostat disposed at the coolant outlet of the stack, a heating branch formed by connecting the thermostat to the main circulation pump, and a PTC heater disposed on the heating branch.

[0013] Preferably or optionally, a parallel branch is provided between the coolant outlet of the stack and the main radiator. A deionizer is provided on the parallel branch. The coolant of the parallel branch and the outlet of the main radiator converge to the main expansion tank.

[0014] Preferably or optionally, a coolant filter is further provided between the main expansion tank and the main circulation pump.

[0015] The present utility model further provides a hydrogen fuel power generation device, including the hydrogen fuel power generation device thermal management system described above.

[0016] The present utility model relates to a hydrogen fuel power generation device thermal management system and its hydrogen fuel power generation device. Compared with the prior art, it has the following beneficial effects: Instead of directly adopting a single or completely independent multi-cooling circuit, the present utility model designs a cooling architecture with a dual-cooling circuit. The first cooling circuit directly manages the most critical and highest heat load stack and ensures that it operates within the most suitable temperature range. The second cooling circuit controls the temperature of other auxiliary devices and electronic components, which can not only meet the temperature control requirements of different components but also minimize the system complexity and occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the thermal management system in the present utility model.

[0018] Figure 2 is a schematic structural diagram of the first cooling circuit in the present utility model.

[0019] Figure 3 is a schematic structural diagram of the second cooling circuit in the present utility model.

[0020] Reference numerals are:

[0021] 100, First Cooling Circuit; 110, Main Radiator; 120, Main Circulation Pump; 130, Stack; 140, Intercooler; 150, Thermostat; 160, PTC Heater; 170, Main Expansion Tank; 180, Deionizer;

[0022] 200, Second Cooling Circuit; 210, Auxiliary Radiator; 220, Auxiliary Circulation Pump; 230, Second Boost DC Module; 240, First Boost DC Module; 250, Air Compressor; 270, Hydrogen Circulation Pump Controller. Detailed Embodiment

[0023] In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present utility model, some well-known technical features in the art are not described.

[0024] Refer to the attached Figures 1 to 3 , A thermal management system for a hydrogen fuel power generation device, mainly applied to a hydrogen fuel power generation device, the thermal management system includes: a first cooling circuit 100 and a second cooling circuit 200.

[0025] Among them, the first cooling circuit 100 mainly serves the stack 130 and the intercooler 140 to ensure temperature control of the core components of the stack 130; specifically, the first cooling circuit 100 passes through the main radiator 110, the main circulation pump 120, the stack 130 and the intercooler 140; the outlet of the main radiator 110 is connected to the inlet of the main circulation pump 120, and the outlet of the main circulation pump 120 is divided into two paths, which are respectively connected to the coolant inlets of the stack 130 and the intercooler 140, and the coolant outlets of the intercooler 140 and the stack 130 are connected to the inlet of the main radiator 110.

[0026] The second cooling circuit 200 is responsible for cooling the electrical modules and the accessories of the stack 130 (such as the air compressor 250, the air compressor controller, the hydrogen circulation pump controller 270), ensuring the heat dissipation requirements of the key components, and optimizing the space and energy efficiency through the sharing of the main circulation pump 120. Specifically, the second cooling circuit 200 passes through the auxiliary radiator 210, the auxiliary circulation pump 220, the electrical modules and the accessories of the stack 130; the outlet of the auxiliary radiator 210 is connected to the inlet of the auxiliary circulation pump 220, and the outlet of the auxiliary circulation pump 220 is divided into two paths, which are respectively connected to the coolant inlets of the electrical modules and the accessories of the stack 130, and the coolant outlets of the electrical modules and the accessories of the stack 130 are connected to the inlet of the auxiliary radiator 210.

[0027] In a further embodiment, the electrical module includes: a first boost DC module 240 for powering internal devices, and a second boost DC module 230 for powering external devices; the first boost DC module 240 boosts the electricity generated by the fuel cell stack 130 and supplies it to various required components of the hydrogen fuel power generation device, such as a hydrogen circulation pump and an air compressor 250. The second boost DC module 230 boosts the electricity generated by the fuel cell stack 130, and the output terminal of the second boost DC module 230 is connected to the electrical equipment used, such as for 420vdc vehicle charging, 650vdc vehicle charging, DCAC grid-connected inverter, etc. Since the second boost DC module 230 is responsible for powering external devices and is more sensitive to temperature, it is preferentially cooled. Therefore, one path of the second cooling circuit 200 sequentially passes through the second boost DC module 230 and the first boost DC module 240 to ensure balanced and efficient thermal management of the entire electrical module.

[0028] In a further embodiment, the accessories of the fuel cell stack 130 include: an air compressor 250 and a hydrogen circulation pump; the air compressor 250 provides necessary compressed air (oxygen) for the fuel cell stack 130, and the hydrogen circulation pump is responsible for circulating hydrogen inside the fuel cell stack 130. Since the electronic components in the air compressor 250 controller and the hydrogen circulation pump controller 270 are more sensitive to temperature changes, and overheating may cause performance degradation or even damage, the other path of the second cooling circuit 200 is further divided into two paths. One path sequentially passes through the air compressor controller and the air compressor 250; the other path passes through the hydrogen circulation pump controller 270. This can ensure that the air compressor 250, the air compressor controller, and the hydrogen circulation pump controller 270 operate within a safe temperature range and maintain stable control of the air compressor 250 and the hydrogen circulation pump.

[0029] In a further embodiment, the first cooling circuit 100 further includes: a thermostat 150 provided at the coolant outlet of the fuel cell stack 130, a heating branch formed by connecting the thermostat 150 to the main circulation pump 120, and a PTC heater 160 provided on the heating branch. The thermostat 150 and the PTC heater 160 configured at the coolant outlet of the fuel cell stack 130 can quickly heat the coolant in a low-temperature environment, ensuring the cold start performance and temperature stability of the fuel cell stack 130. When the fuel cell stack 130 is cold-started at low temperature in winter, the PTC heater 160 is turned on to heat the coolant and quickly heat the coolant to a set temperature to ensure the quick and stable start of the entire system.

[0030] In a further embodiment, a parallel branch is provided between the coolant outlet of the stack 130 and the main radiator 110. A deionizer 180 is provided in the parallel branch. The coolant in the parallel branch and the coolant at the outlet of the main radiator 110 converge into the main expansion tank 170. A coolant filter is further provided between the main expansion tank 170 and the main circulation pump 120. Among them, anions and cations in the coolant are removed by the deionizer 180 to avoid electric leakage of the bipolar plate. Then, through the coolant filter between the main expansion tank 170 and the main circulation pump 120, the quality of the coolant is effectively managed, scale formation and corrosion are prevented, and the service life of the hydrogen fuel power generation device is extended.

[0031] To facilitate the understanding of the technical solution of this embodiment, the working principle of the thermal management system of the hydrogen fuel power generation device will be briefly described as follows: In the first cooling loop 100, the main coolant flows into the main coolant inlet of the stack 130 system, is pumped by the main circulation pump 120, and is sent into the stack 130. At the outlet of the main circulation pump 120, one path of the coolant enters the stack 130, and the other path of the coolant enters the intercooler 140. The main coolant flowing out of the stack 130 flows into the thermostat 150. One path of the coolant flows out to the coolant outlet and returns to the main radiator 110. The other path of the coolant flows into the PTC, is heated by the PTC, and then is pumped by the main circulation pump 120 and sent into the stack 130. The main coolant flowing out of the main coolant outlet returns to the main radiator 110 for heat dissipation. Meanwhile, a deionizer 180 is provided on the branch. The coolant passing through the deionizer 180 flows into the main expansion tank 170, is mixed with the coolant on the main path, and then enters the main coolant inlet of the stack 130 system after passing through the coolant filter. And so on in a cycle.

[0032] In the second cooling loop 200, the auxiliary coolant flows into the auxiliary coolant inlet of the stack 130 system and is divided into two paths. One path of the coolant flows into the air compressor controller, then flows to the air compressor, and finally returns to the auxiliary coolant outlet. The other path of the coolant flows into the circulation pump controller and then returns to the auxiliary coolant outlet. The auxiliary coolant flows out of the auxiliary expansion tank, is pumped to the auxiliary circulation pump 220, and after coming out of the auxiliary circulation pump 220, it is divided into two paths. One path first enters the second boost DC, then enters the first boost DC, and then returns to the auxiliary radiator 210. The other path enters the auxiliary coolant inlet of the stack 130 system and then returns to the auxiliary radiator 210 from the auxiliary coolant outlet of the stack 130 system. And so on in a cycle.

[0033] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

Claims

1. A thermal management system for a hydrogen fuel power generation device, characterized in that: include: A first cooling circuit (100) passes through a main radiator (110), a main circulation pump (120), a fuel cell stack (130) and an intercooler (140); the outlet of the main radiator (110) is connected to the inlet of the main circulation pump (120); the outlet of the main circulation pump (120) is divided into two paths, which are respectively connected to the coolant inlets of the fuel cell stack (130) and the intercooler (140); and the coolant outlets of the intercooler (140) and the fuel cell stack (130) are connected to the inlet of the main radiator (110); The second cooling circuit (200) passes through an auxiliary radiator (210), an auxiliary circulation pump (220), an electrical module and accessories of the battery stack (130); the outlet of the auxiliary radiator (210) is connected to the inlet of the auxiliary circulation pump (220); the outlet of the auxiliary circulation pump (220) is divided into two paths, which are respectively connected to the coolant inlets of the electrical module and accessories of the battery stack (130); the coolant outlets of the electrical module and accessories of the battery stack (130) are connected to the inlet of the auxiliary radiator (210).

2. The thermal management system of a hydrogen fuel power generation device according to claim 1, characterized in that: The electrical module comprises: a first boost DC module (240) for supplying power to internal devices, and a second boost DC module (230) for supplying power to external devices.

3. The thermal management system of a hydrogen fuel power generation device according to claim 2, characterized in that: One path of the second cooling circuit (200) passes through the second boost DC module (230) and the first boost DC module (240) in sequence.

4. The thermal management system of a hydrogen fuel power generation device according to claim 1, characterized in that: The accessories of the fuel cell stack (130) include: an air compressor (250) and a hydrogen circulation pump; The other path of the second cooling circuit (200) is further divided into two paths, one of which passes through the air compressor controller and the air compressor (250) in sequence; and the other passes through the hydrogen circulation pump controller (270).

5. The thermal management system of a hydrogen fuel power generation device according to claim 1, characterized in that: The first cooling circuit (100) further comprises: a thermostat (150) disposed at the coolant outlet of the battery stack (130), a heating branch formed by connecting the thermostat (150) and the main circulation pump (120), and a PTC heater (160) disposed on the heating branch.

6. The thermal management system of a hydrogen fuel power generation device according to claim 1, characterized in that: A parallel branch is provided between the coolant outlet of the battery stack (130) and the main radiator (110).

7. The thermal management system of a hydrogen fuel power generation device according to claim 6, characterized in that: The parallel branch is provided with a deionizer (180).

8. The thermal management system of a hydrogen fuel power generation device according to claim 6, characterized in that: The coolant at the outlet of the parallel branch and the main radiator (110) converges into the main expansion water tank (170).

9. The thermal management system of a hydrogen fuel power generation device according to claim 8, characterized in that: A coolant filter is also provided between the main expansion water tank (170) and the main circulation pump (120).

10. A hydrogen fuel power generation device, characterized in that: A thermal management system for a hydrogen fuel power generation device comprising any one of claims 1 to 9.

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