Fuel cell system and electric equipment with same

Abstract

The utility model discloses a fuel cell system and electric equipment with the same. The fuel cell system comprises an electric pile, a hydrogen loop and a heat management loop, the hydrogen loop is communicated with the electric pile, the heat management loop is used for circulating a heat exchange medium, the heat management loop is provided with a heating device and a heat exchange device, the heating device is used for heating the heat exchange medium, and the heat exchange device exchanges heat with the hydrogen loop through the heat exchange medium. The heat exchange device can utilize the heat exchange medium heated by the heating device to heat and preserve heat of the hydrogen loop, so that precipitation of liquid water in the hydrogen loop is reduced, the liquid water is prevented from being accumulated in the hydrogen loop to block the hydrogen loop, the hydrogen loop can continuously supply hydrogen to an electric pile, and the efficiency and performance of a fuel cell system can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a fuel cell system and an electrical device having the fuel cell system. Background Art

[0002] In a fuel cell system, hydrogen that does not participate in the reaction discharged from the stack can flow back into the stack through the hydrogen circuit to improve the utilization efficiency of the hydrogen. However, while discharging hydrogen that does not participate in the reaction, the stack also carries nitrogen, gaseous water generated by the reaction and other gases. These gases, together with the hydrogen that does not participate in the reaction, form a mixed gas that flows back into the stack through the hydrogen circuit. Liquid water is easily precipitated from the mixed gas in the process of flowing back to the stack through the hydrogen circuit. The liquid water is likely to block the hydrogen circuit, resulting in insufficient hydrogen supply and poor efficiency and performance of the fuel cell system. Utility Model Content

[0003] The utility model aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, the utility model provides a fuel cell system that can reduce the precipitation of liquid water in the hydrogen circuit.

[0004] The utility model also provides an electrical device having the fuel cell system.

[0005] According to an embodiment of the utility model, the fuel cell system includes a fuel cell stack, a hydrogen circuit and a thermal management circuit, wherein the hydrogen circuit is connected to the fuel cell stack, the thermal management circuit is used to circulate a heat exchange medium, the thermal management circuit is provided with a heating device and a heat exchange device, the heating device is used to heat the heat exchange medium, and the heat exchange device exchanges heat with the hydrogen circuit through the heat exchange medium.

[0006] According to the fuel cell system of the embodiment of the utility model, the hydrogen circuit is connected to the fuel cell stack, and the heat exchange device can use the heat exchange medium heated by the heating device to heat and insulate the hydrogen circuit, thereby reducing the precipitation of liquid water in the hydrogen circuit, avoiding the accumulation of liquid water in the hydrogen circuit and clogging the hydrogen circuit, ensuring that the hydrogen circuit can continuously supply hydrogen to the fuel cell stack, thereby helping to improve the efficiency and performance of the fuel cell system.

[0007] According to some embodiments of the present invention, the heat exchange device is configured as a heat exchange jacket, and the heat exchange jacket is disposed on at least a portion of the outer side of the hydrogen circuit.

[0008] According to some embodiments of the utility model, the fuel cell system also includes an air compressor, the heating device has an air cavity and a medium cavity, the air compressor is connected to the fuel cell stack through the air cavity, the medium cavity is connected to the heat exchange device, and the compressed air output by the air compressor heats the heat exchange medium in the medium cavity through the air cavity.

[0009] According to some embodiments of the present utility model, the thermal management circuit is further provided with a heat sink, the inlet of the heat sink is connected to the outlet of the heat exchange device, and the outlet of the heat sink is connected to the inlet of the medium cavity.

[0010] According to some embodiments of the present utility model, the thermal management circuit is further provided with a pumping device, and the pumping device pumps the heat exchange medium from the heating device to the heat exchange device.

[0011] According to some embodiments of the present utility model, the hydrogen circuit is provided with a gas-liquid separation device and a fluid conveying device, and the gas-liquid separation device is located upstream of the fluid conveying device.

[0012] According to some embodiments of the present utility model, the gas-liquid separation device is provided with a drain valve.

[0013] According to some embodiments of the present invention, the fluid delivery device includes a hydrogen pump and / or an ejector.

[0014] According to some embodiments of the present invention, the fuel cell system further includes a hydrogen storage bottle, which is connected to the hydrogen circuit and is used to supply hydrogen to the hydrogen circuit.

[0015] According to another aspect of the present invention, an electrical device includes the above-mentioned fuel cell system.

[0016] According to the electrical equipment in the embodiment of the utility model, the hydrogen circuit in the fuel cell system is connected to the fuel cell stack, and the heat exchange device can use the heat exchange medium heated by the heating device to heat and insulate the hydrogen circuit, thereby reducing the precipitation of liquid water in the hydrogen circuit, avoiding the accumulation of liquid water in the hydrogen circuit and clogging the hydrogen circuit, ensuring that the hydrogen circuit can continuously supply hydrogen to the fuel cell stack, thereby helping to improve the efficiency and performance of the electrical equipment.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of a fuel cell system according to an embodiment of the present utility model.

[0019] Reference numerals:

[0020] Battery stack 1;

[0021] Hydrogen circuit 2; gas-liquid separation device 23; drain valve 231; fluid delivery device 24; hydrogen pump 241; ejector 242;

[0022] Thermal management circuit 3; heating device 31; heat exchange device 32; heat dissipation device 33; pumping device 34;

[0023] Air compressor 4;

[0024] Hydrogen storage bottle 5;

[0025] Air flow path 6;

[0026] Fuel cell system 10. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Combine the following Figure 1 The fuel cell system 10 and the electric device having the same according to the embodiment of the present invention are described in detail.

[0032] Reference Figure 1As shown, according to an embodiment of the utility model, the fuel cell system 10 includes a fuel cell stack 1, a hydrogen circuit 2 and a thermal management circuit 3. The hydrogen circuit 2 is connected to the fuel cell stack 1. The hydrogen discharged from the fuel cell stack 1 that does not participate in the reaction can flow back into the fuel cell stack 1 through the hydrogen circuit 2 to improve the utilization efficiency of the hydrogen. While discharging the hydrogen that does not participate in the reaction, the fuel cell stack 1 also carries nitrogen, gaseous water generated by the reaction and other gases. The mixed gas composed of the hydrogen that does not participate in the reaction flows back into the fuel cell stack through the hydrogen circuit 2. The thermal management circuit 3 is used to circulate a heat exchange medium. The thermal management circuit 3 is provided with a heating device 31 and a heat exchange device 32. The heating device 31 is used to heat the heat exchange medium. The heat exchange device 32 can exchange heat with the hydrogen circuit 2 through the heat exchange medium to prevent the hydrogen circuit 2 from cooling down and reduce the precipitation of liquid water from the mixed gas in the hydrogen circuit 2, thereby reducing the risk of liquid water blocking the hydrogen circuit 2, which is beneficial to improving the efficiency and performance of the fuel cell system 10.

[0033] It can be understood that the fuel cell stack 1 has an anode inlet and an anode outlet, and the hydrogen loop 2 has a loop inlet and a loop outlet, the loop outlet is connected to the anode inlet, and the loop inlet is connected to the anode outlet. The hydrogen in the hydrogen loop 2 can enter the fuel cell stack 1 through the loop outlet and the anode inlet, and the hydrogen can participate in the electrochemical reaction in the fuel cell stack 1 and generate water. When the fuel cell stack 1 discharges the hydrogen that has not participated in the reaction, it will carry gaseous water, nitrogen and other gases generated by the reaction. These gases and the mixed gas composed of hydrogen that has not participated in the reaction enter the hydrogen loop 2 through the anode outlet and the loop inlet. The heat exchange device 32 can use the heat exchange medium heated by the heating device 31 to heat and keep the hydrogen loop 2 warm, so as to increase or maintain the temperature of the mixed gas in the hydrogen loop 2, prevent the mixed gas in the hydrogen loop 2 from cooling down and precipitating liquid water, and avoid liquid water accumulation in the hydrogen loop 2 to block the hydrogen loop 2, so as to ensure that the hydrogen loop 2 can continuously supply hydrogen to the fuel cell stack 1, so as to improve the efficiency and performance of the fuel cell system 10.

[0034] It should be noted that gaseous water has a saturated concentration, and the saturated concentration is positively correlated with temperature. When the temperature decreases, the saturated concentration of gaseous water decreases accordingly, and the gaseous water condenses to precipitate liquid water. In the embodiment of the utility model, the heat exchange medium in the thermal management loop 3 is heated by the heating device 31, and the heat exchange medium heats and keeps the hydrogen loop 2 warm through the heat exchange device 32 to avoid a drop in the temperature of the hydrogen loop 2, thereby preventing the gaseous water in the mixed gas in the hydrogen loop 2 from condensing into liquid water due to a drop in temperature.

[0035] According to the fuel cell system 10 of the embodiment of the utility model, the hydrogen loop 2 is connected to the fuel cell stack 1, and the heat exchange device 32 can use the heat exchange medium heated by the heating device 31 to heat and keep the hydrogen loop 2 warm, thereby reducing the precipitation of liquid water in the hydrogen loop 2, avoiding the accumulation of liquid water in the hydrogen loop 2 and clogging the hydrogen loop 2, ensuring that the hydrogen loop 2 can continuously supply hydrogen to the fuel cell stack 1, thereby helping to improve the efficiency and performance of the fuel cell system 10.

[0036] In some embodiments of the present invention, referring to Figure 1 As shown, the heat exchange device 32 is constructed as a heat exchange jacket, which is arranged on at least a part of the outer side of the hydrogen loop 2. The heat exchange jacket can heat and keep the hydrogen loop 2 warm, thereby effectively preventing the hydrogen loop 2 from precipitating liquid water. Preferably, the heat exchange jacket is arranged on the entire outer side of the hydrogen loop 2, that is, the heat exchange jacket can be entirely covered on the outer side of the hydrogen loop 2 to isolate the hydrogen loop 2 from the external environment, thereby preventing the hydrogen loop 2 from dissipating heat to the external environment. Among them, the heat exchange jacket has a heat exchange cavity for the circulation of heat exchange medium, and the heat exchange cavity is arranged around the outer side of the hydrogen loop 2. When the heat exchange medium flows through the heat exchange cavity, the heat exchange medium can heat and keep the hydrogen loop 2 warm through the heat exchange cavity.

[0037] In some embodiments of the present invention, referring to Figure 1 As shown, the fuel cell system 10 also includes an air compressor 4, which is suitable for providing compressed air to the fuel cell stack 1. The heating device 31 has an air cavity and a medium cavity. The air compressor 4 is connected to the fuel cell stack 1 through the air cavity, and the medium cavity is connected to the heat exchange device 32. The compressed air output by the air compressor 4 heats the heat exchange medium in the medium cavity through the air cavity to achieve cooling of the compressed air, and fully utilizes the waste heat of the compressed air to heat the heat exchange medium. The hydrogen loop 2 is heated and insulated by the heated heat exchange medium, which is beneficial to improving the energy utilization rate of the fuel cell system 10.

[0038] It can be understood that when the air compressor 4 compresses the air, the temperature of the air will increase. After the compressed air output by the air compressor 4 enters the air cavity of the heating device 31, the air cavity and the medium cavity can exchange heat. The compressed air heats the heat exchange medium in the medium cavity through the air cavity, so that the compressed air in the air cavity is cooled and the heat exchange medium in the medium cavity is heated. The heated heat exchange medium can enter the heat exchange device 32 from the medium cavity to heat and keep the hydrogen circuit 2 warm through the heat exchange device 32. At the same time, the cooled compressed air can enter the fuel cell 1 from the air cavity to participate in the electrochemical reaction, so as to avoid the compressed air temperature being too high and affecting the cooling of the fuel cell 1.

[0039] Reference Figure 1 As shown, the air compressor 4 and the air cavity of the heating device 31 can constitute the air flow path 6 of the fuel cell system 10 , and the air flow path 6 is suitable for providing cooled compressed air to the fuel cell stack 1 .

[0040] In some embodiments of the present invention, referring to Figure 1 As shown, the thermal management loop 3 is also provided with a heat sink 33, which can dissipate heat and cool down the heat exchange medium in the thermal management loop 3. The heat exchange medium can circulate in the thermal management loop 3, and the inlet of the heat sink 33 is connected to the outlet of the heat exchange device 32, and the outlet of the heat sink 33 is connected to the inlet of the medium cavity. The heat exchange medium can flow from the outlet of the heat sink 33 into the inlet of the medium cavity, and then flow into the inlet of the heat exchange device 32 through the outlet of the medium cavity, and finally flow into the inlet of the heat sink 33 from the outlet of the heat exchange device 32, and the above process is repeated continuously to ensure that the heat of the heat exchange medium entering the heat exchange device 32 from the outlet of the medium cavity is fully utilized, thereby facilitating the improvement of the energy utilization rate of the fuel cell system 10.

[0041] Specifically, in the thermal management loop 3, the circulation flow path of the heat exchange medium is: heat sink 33→heating device 31→heat exchange device 32→heat sink 33. The heat exchange medium can be first cooled in the heat sink 33 and then flow to the heating device 31. The heat exchange medium can be heated in the heating device 31 and then flow to the heat exchange device 32. The heat exchange medium can heat and keep the hydrogen loop 2 warm in the heat exchange device 32, so that the heat of the heat exchange medium can be fully utilized. The heat exchange medium can finally flow back to the heat sink 33 from the heat exchange device 32. The path of the heat exchange medium flowing from the heating device 31 to the heat sink 33 is longer. The hydrogen loop 2 can also absorb part of the heat of the heat exchange medium at the heat exchange device 32. The heat of the heat exchange medium when flowing back to the heat sink 33 is relatively small, and the heat dissipation load of the heat sink 33 is small, which is beneficial to improving the energy utilization rate of the fuel cell system 10.

[0042] In some embodiments of the present invention, referring to Figure 1 As shown, the heat management loop 3 is also provided with a pumping device 34 for pumping the heat exchange medium. The pumping device 34 pumps the heat exchange medium from the heating device 31 to the heat exchange device 32. The pumping device 34 can be set at any position in the heat management loop 3. The pumping device 34 can provide power for the flow of the heat exchange medium to increase the flow rate of the heat exchange medium circulating in the heat management loop 3, thereby facilitating the improvement of the heat exchange efficiency between the heat exchange medium and the compressed air, and improving the heating and heat preservation effect of the heat exchange medium on the hydrogen loop 2. Among them, the pumping device 34 can be a centrifugal pump, an axial flow pump, etc.

[0043] It can be understood that after the heat exchange medium in the heating device 31 absorbs the heat of the compressed air output by the air compressor 4, the heat exchange medium has a relatively high heat content. The pumping device 34 can pump the heated heat exchange medium in the heating device 31 to the heat exchange device 32, so that the heated heat exchange medium can heat and insulate the hydrogen circuit 2, thereby realizing the reuse of the heat of the compressed air output by the air compressor 4, which is beneficial to improving the energy utilization rate of the fuel cell system 10.

[0044] Preferably, refer to Figure 1 As shown, the pumping device 34 is arranged between the heating device 31 and the heat exchange device 32 to increase the flow rate of the heat exchange medium from the heating device 31 to the heat exchange device 32, reduce the flow resistance of the heat exchange medium, and enable the heat exchange medium heated in the heating device 31 to be quickly pumped to the heat exchange device 32, thereby reducing the heat loss of the heat exchange medium, thereby facilitating the improvement of the heating and heat preservation effect of the heat exchange medium on the hydrogen circuit 2 and improving the pumping efficiency of the pumping device 34.

[0045] In some embodiments of the present invention, referring to Figure 1 As shown, in the thermal management loop 3, the heating device 31 can be constructed as an intercooler, the heat exchange device 32 can be constructed as an annular water jacket, the water outlet of the intercooler is connected to the inlet of the annular water jacket, the water inlet of the intercooler is connected to the outlet of the heat sink 33, the outlet of the annular water jacket is connected to the inlet of the heat sink 33, the heat exchange medium can be a coolant, the coolant is first cooled in the heat sink 33 and then flows to the intercooler, the coolant is heated in the intercooler and flows to the annular water jacket, and the heated coolant can heat and keep the hydrogen loop 2 warm in the annular water jacket.

[0046] In the related art, the heat exchange medium heated by the intercooler directly flows back to the heat sink 33 for cooling. The heat of the heat exchange medium when flowing back to the heat sink 33 is relatively large, resulting in a large heat dissipation load of the heat sink 33, and the heat of the heat exchange medium is not effectively utilized. According to the fuel cell system 10 of the embodiment of the utility model, the heat exchange medium can flow into the heat exchange device 32 after being heated in the medium cavity of the heating device 31. The heated heat exchange medium can heat and keep the hydrogen circuit 2 in the heat exchange device 32 to fully utilize the heat of the heated heat exchange medium, which is beneficial to improve the energy utilization rate of the fuel cell system 10. At the same time, the path of the heat exchange medium flowing from the heating device 31 back to the heat sink 33 is longer, and the hydrogen circuit 2 can also absorb part of the heat of the heat exchange medium at the heat exchange device 32. The heat of the heat exchange medium when flowing back to the heat sink 33 is relatively small, and the heat dissipation load of the heat sink 33 is small.

[0047] In some embodiments of the present invention, referring to Figure 1As shown, the hydrogen circuit 2 is provided with a gas-liquid separation device 23 and a fluid conveying device 24. The gas-liquid separation device 23 is located upstream of the fluid conveying device 24. The gas-liquid separation device 23 can separate the gas and liquid flowing to the fluid conveying device 24. The gas can flow to the fluid conveying device 24 through the gas-liquid separation device 23. The gas-liquid separation device 23 can prevent the liquid from passing through to avoid the liquid from clogging the fluid conveying device 24. The fluid conveying device 24 can provide power for the gas flow in the hydrogen circuit 2 to realize the delivery of hydrogen to the fuel cell stack 1. Among them, the substances discharged into the hydrogen circuit 2 by the fuel cell stack 1 may include: hydrogen, nitrogen, liquid water and gaseous water, etc. The gas-liquid separation device 23 can separate the liquid water upstream of the fluid conveying device 24 to ensure that only gases such as hydrogen, nitrogen and gaseous water enter the fluid conveying device 24 downstream of the gas-liquid separation device 23, to avoid liquid water clogging the fluid conveying device 24, to prevent the power consumption and performance of the fluid conveying device 24 from decreasing, thereby helping to improve the efficiency of the fluid conveying device 24 in conveying hydrogen into the fuel cell stack 1 and reduce the power consumption of the fluid conveying device 24.

[0048] In some embodiments of the present invention, referring to Figure 1 As shown, the gas-liquid separation device 23 is provided with a drain valve 231, and the drain valve 231 can discharge the liquid separated by the gas-liquid separation device 23. The drain valve 231 can be a solenoid valve, a ball valve, etc.

[0049] It is understandable that after the gas-liquid separation device 23 separates liquid and gas, liquid may accumulate in the gas-liquid separation device 23. Especially when the fuel cell system 10 is operated for a long time, excessive liquid accumulation may easily cause blockage of the gas-liquid separation device 23. The drain valve 231 can discharge the accumulated liquid from the gas-liquid separation device 23 to maintain the normal operation of the gas-liquid separation device 23.

[0050] In some embodiments of the utility model, the drain valve 231 is constructed as a solenoid valve, and a sensor for detecting the amount of water in the liquid in the gas-liquid separation device 23 may be provided in the gas-liquid separation device 23. Both the solenoid valve and the sensor can be communicatively connected to the controller of the fuel cell system 10. When the sensor detects that the liquid in the gas-liquid separation device 23 is stored to a preset threshold, the controller can control the solenoid valve to open to automatically discharge the liquid in the gas-liquid separation device 23.

[0051] In some embodiments of the present invention, referring to Figure 1 As shown, the fluid delivery device 24 includes a hydrogen pump 241 and / or an ejector 242 to pressurize the gas in the hydrogen loop 2 and provide power for the gas flow, so as to realize the delivery of hydrogen into the fuel cell stack 1.

[0052] In one embodiment, the fluid delivery device 24 includes a hydrogen pump 241 , which is suitable for pressurizing the gas in the hydrogen loop 2 and providing power for the gas flow, so as to realize the delivery of hydrogen into the fuel cell stack 1 .

[0053] In another embodiment, the fluid delivery device 24 includes an ejector 242, which can use high-speed high-energy gas to eject low-speed low-energy gas, thereby pressurizing the gas in the hydrogen circuit 2 and providing power for the gas flow, so as to realize the delivery of hydrogen into the fuel cell stack 1.

[0054] In another embodiment, referring to Figure 1 As shown, the fluid delivery device 24 includes a hydrogen pump 241 and an ejector 242. The hydrogen pump 241 is suitable for pressurizing the gas in the hydrogen circuit 2. The ejector 242 can use high-speed and high-energy gas to eject low-speed and low-energy gas to pressurize the gas in the hydrogen circuit 2, provide power for the gas flow, and realize the delivery of hydrogen to the fuel cell stack 1.

[0055] In some embodiments of the present invention, referring to Figure 1 As shown, the fuel cell system 10 also includes a hydrogen storage bottle 5, which is connected to the hydrogen circuit 2 and is used to supply hydrogen to the hydrogen circuit 2. The hydrogen storage bottle 5 can be used to store hydrogen and continuously provide hydrogen to the fuel cell stack 1 through the hydrogen circuit 2 to maintain normal operation of the fuel system.

[0056] In some embodiments of the present invention, referring to Figure 1 As shown, the gas cylinder 5 is connected to the ejector 242, and the gas cylinder 5 can output high-flow hydrogen to the ejector 242. The high-flow hydrogen can form a negative pressure in the ejector 242 to accelerate the mixed gas in the hydrogen circuit 2.

[0057] According to another embodiment of the present invention, an electric device includes the fuel cell system 10 of the above embodiment.

[0058] According to the electrical equipment of the embodiment of the utility model, the hydrogen loop 2 in the fuel cell system 10 is connected to the fuel cell stack 1, and the heat exchange device 32 can use the heat exchange medium heated by the heating device 31 to heat and keep the hydrogen loop 2 warm, thereby reducing the precipitation of liquid water in the hydrogen loop 2, avoiding the accumulation of liquid water in the hydrogen loop 2 and clogging the hydrogen loop 2, ensuring that the hydrogen loop 2 can continuously supply hydrogen to the fuel cell stack 1, thereby helping to improve the efficiency and performance of the electrical equipment.

[0059] In some embodiments of the present invention, the electrical device may be a vehicle.

[0060] In the description of this specification, the description of reference terms such as "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0061] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A fuel cell system, characterized in that: The invention comprises a fuel cell stack (1), a hydrogen circuit (2) and a heat management circuit (3), wherein the hydrogen circuit (2) is connected to the fuel cell stack (1), the heat management circuit (3) is used for circulating a heat exchange medium, and the heat management circuit (3) is provided with a heating device (31) and a heat exchange device (32), wherein the heating device (31) is used for heating the heat exchange medium, and the heat exchange device (32) exchanges heat with the hydrogen circuit (2) through the heat exchange medium.

2. The fuel cell system according to claim 1, characterized in that: The heat exchange device (32) is configured as a heat exchange jacket, which is disposed on at least a portion of the outer side of the hydrogen circuit (2).

3. The fuel cell system according to claim 1, characterized in that: It also includes an air compressor (4), the heating device (31) having an air cavity and a medium cavity, the air compressor (4) being connected to the fuel cell stack (1) via the air cavity, the medium cavity being connected to the heat exchange device (32), and the compressed air output by the air compressor (4) heating the heat exchange medium in the medium cavity via the air cavity.

4. The fuel cell system according to claim 3, characterized in that: The heat management circuit (3) is also provided with a heat dissipation device (33), the inlet of the heat dissipation device (33) is connected to the outlet of the heat exchange device (32), and the outlet of the heat dissipation device (33) is connected to the inlet of the medium cavity.

5. The fuel cell system according to claim 1, characterized in that: The heat management circuit (3) is also provided with a pumping device (34), and the pumping device (34) pumps the heat exchange medium from the heating device (31) to the heat exchange device (32).

6. The fuel cell system according to any one of claims 1 to 5, characterized in that: The hydrogen circuit (2) is provided with a gas-liquid separation device (23) and a fluid conveying device (24), and the gas-liquid separation device (23) is located upstream of the fluid conveying device (24).

7. The fuel cell system according to claim 6, characterized in that: The gas-liquid separation device (23) is provided with a drain valve (231).

8. The fuel cell system according to claim 6, characterized in that: The fluid delivery device (24) includes a hydrogen pump (241) and / or an ejector (242).

9. The fuel cell system according to claim 1, characterized in that: It also comprises a hydrogen storage bottle (5), which is connected to the hydrogen circuit (2) and is used to supply hydrogen to the hydrogen circuit (2).

10. An electrical device, characterized in that: Comprising a fuel cell system (10) according to any one of claims 1-9.

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