A heat exchange system for a fuel cell

Abstract

The application relates to a heat exchange system of a fuel cell and belongs to the technical field of fuel cells. The heat exchange system comprises a cell stack, an integrated heat exchanger and a hydrogen storage tank for storing low-temperature hydrogen. The integrated heat exchanger can realize the heating function of hydrogen while radiating high-temperature water from the cell stack. The hydrogen outlet of the hydrogen storage tank is communicated with the hydrogen inlet of the integrated heat exchanger. The heat exchange container in the integrated heat exchanger heats low-temperature hydrogen output from the hydrogen storage tank. The hydrogen outlet of the integrated heat exchanger is connected with the hydrogen inlet of the cell stack. The water outlet of the cell stack is connected with the water inlet of the integrated heat exchanger. The integrated heat exchanger radiates and cools high-temperature water output from the cell stack and then recycles the high-temperature water back into the cell stack. The integrated heat exchanger of the application can realize the heating function of hydrogen while radiating high-temperature water from the cell stack, reduces the pipeline interface and pipeline arrangement, and reduces the leakage risk.

Description

Technical Field

[0001] The invention relates to a heat exchange system of a fuel cell, belonging to the technical field of fuel cells. Background Art

[0002] A hydrogen fuel cell is a power generation device that generates electricity through a chemical reaction between hydrogen and oxygen. The working principle of a hydrogen fuel cell is to deliver hydrogen to the anode plate of the cell. A catalyst reacts with the hydrogen atom to transform it into a positively charged hydrogen ion and a negatively charged electron. The hydrogen ion then travels through the electrolyte to the cathode plate, while the electron cannot pass through the electrolyte and must flow through an external circuit to form an electric current. Upon reaching the cathode plate, the electron recombines with the oxygen atom and hydrogen ion to form water.

[0003] Since fuel cells generate a lot of heat during the electrochemical reaction, they need to circulate the high-temperature water from the battery stack into low-temperature water through a water cooling system (including a primary cooling system and a secondary cooling system) to maintain a relatively stable operating temperature. Hydrogen usually needs to be heated before entering the battery stack through a hydrogen injector. The cooling system requires a fan to rotate to release heat, while hydrogen heating requires absorbing heat. With the rapid development of hydrogen fuel cell systems, the requirements for improving fuel cell system performance, reducing production costs, and reducing layout space are becoming increasingly higher. At present, the water radiator and hydrogen heater are two independent heat exchange systems. The independent operation of the two cannot effectively utilize heat energy, resulting in energy waste and many defects, such as:

[0004] ① Both the water radiator and the hydrogen heater require separate pipe connections. The pipe design is complex, increasing the space required for parts layout. There are many pipe interfaces, which increases the risk of leakage and wastes system space, seriously affecting the power density of the battery stack.

[0005] ②Increasing the difficulty of the control system is not conducive to solving the system's thermal management problems;

[0006] ③ The costs of manufacturing, assembly, inspection and maintenance are high, and these high costs seriously restrict the promotion and application of fuel cells. Summary of the Invention

[0007] The purpose of the present invention is to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.

[0008] The technical solution provided by the present invention is as follows: A heat exchange system for a fuel cell, comprising a cell stack, an integrated heat exchanger and a hydrogen storage tank, wherein the hydrogen storage tank is used to store low-temperature hydrogen, and the integrated heat exchanger can heat the high-temperature water coming out of the cell stack while also heating the hydrogen, and can be used as a hydrogen heater at the same time, the hydrogen outlet of the hydrogen storage tank is connected to the hydrogen inlet of the integrated heat exchanger, the heat exchange container in the integrated heat exchanger heats the low-temperature hydrogen output from the hydrogen storage tank, the hydrogen outlet of the integrated heat exchanger is connected to the hydrogen inlet of the cell stack, and the high-temperature water outlet of the cell stack is connected to the water inlet of the integrated heat exchanger, and the integrated heat exchanger dissipates heat and cools the high-temperature water output from the cell stack and then circulates it back into the cell stack.

[0009] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0010] The integrated heat exchanger of the present invention can heat the high-temperature water coming out of the battery stack while also realizing the heating function of hydrogen, and can be used as a hydrogen heater at the same time. The water-heated heat heats the low-temperature hydrogen while also realizing its own heat dissipation, effectively realizing the secondary use of energy, and reducing the pipeline interface and pipeline layout, thereby reducing the risk of leakage; due to the high degree of integration, the system control cost is reduced, and the production and processing costs such as manufacturing and assembly are saved, thereby improving the stability of the system and effectively reducing the maintenance risk.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, the integrated heat exchanger includes a water radiator body, which includes a core and a water inlet chamber and a water outlet chamber respectively fixed on both sides of the core, and also includes a heat exchange container, which is arranged in the water inlet chamber cavity and / or the water outlet chamber cavity, and a water inlet is provided in the water inlet chamber, and a water outlet is provided in the water outlet chamber, and a hydrogen inlet and a hydrogen outlet are provided on the water inlet chamber and / or the water outlet chamber, and the hydrogen inlet and the hydrogen outlet are connected to the heat exchange container.

[0013] The beneficial effect of adopting the above-mentioned further scheme is that the integrated heat exchanger is to install a heat exchange container in the water inlet chamber cavity or the water outlet chamber cavity of the water radiator body. When hydrogen is introduced into the heat exchange container, the heat exchange container uses the high-temperature water in the water inlet chamber cavity or the water outlet chamber cavity to heat the hydrogen to the system required temperature range, completely replacing the existing independent hydrogen heating system. At the same time, the water-heated radiant heat realizes its own heat dissipation while heating the low-temperature hydrogen, thereby effectively realizing the secondary use of energy.

[0014] Furthermore, it also includes an auxiliary radiator and a deionizer. The auxiliary radiator is used to assist in cooling the high-temperature water in the battery stack, and the deionizer is used to remove ionic pollutants in the fuel cell to ensure the normal operation of the fuel cell. The water outlet of the battery stack is divided into three paths, the first path is connected to the water inlet of the integrated heat exchanger, the second path is connected to the water inlet of the auxiliary radiator, and the third path is connected to the water inlet of the deionizer.

[0015] The beneficial effect of adopting the above further solution is that during the operation of the fuel cell, some ionic pollutants, such as sodium ions, potassium ions, chloride ions, etc., will exist in the fuel and oxygen, which will reduce the efficiency and life of the fuel cell and even cause the fuel cell to fail. The deionizer is used to remove the ionic pollutants in the fuel cell to ensure the normal operation of the fuel cell.

[0016] Furthermore, it also includes a first thermostat, a water pump, a second thermostat, an intercooler and an air compressor. The first thermostat, water pump, second thermostat and intercooler are connected in series through pipelines. The water outlet of the integrated heat exchanger, the water outlet of the auxiliary radiator and the water outlet of the deionizer are all connected to the water inlet of the first thermostat. The water outlet of the second thermostat is divided into two paths and is respectively connected to the low-temperature water inlet of the battery stack and the water inlet of the intercooler. The water outlet of the intercooler is divided into two paths and is respectively connected to the water inlet of the integrated heat exchanger and the water inlet of the auxiliary radiator. The air outlet of the air compressor is connected to the air inlet of the intercooler, and the air outlet of the intercooler is connected to the oxygen inlet of the battery stack.

[0017] The beneficial effect of adopting the above further scheme is that the first thermostat, water pump, second thermostat, intercooler and air compressor together constitute a water cooling circulation and an air cooling circulation loop. The thermostat is provided with a temperature sensing component, which can automatically adjust the water volume according to the water temperature, change the water circulation range, and thus achieve the effect of adjusting the heat dissipation capacity of the heat exchange system.

[0018] Furthermore, it also includes a hydrogen injector, which is arranged between the hydrogen outlet of the integrated heat exchanger and the hydrogen inlet of the battery stack, and is used to transport the hydrogen heated by the integrated heat exchanger into the battery stack.

[0019] Furthermore, the water inlet chamber is provided with a water inlet, and the water outlet chamber is provided with a water outlet. When the heat exchange container is provided in the water inlet chamber, the water inlet chamber is provided with two or more interfaces, and the interfaces are all connected to the cavity of the water inlet chamber, and the heat exchange container extends out of the water inlet chamber through the interfaces; when the heat exchange container is provided on the water outlet chamber, the water outlet chamber is provided with two or more interfaces, and the interfaces are all connected to the cavity of the water outlet chamber, and the heat exchange container extends out of the water outlet chamber through the interfaces.

[0020] Furthermore, the heat exchange container includes a single or multiple heat exchange tubes, and the heat exchange tubes are in a serpentine winding structure, a spiral winding structure or a W-shaped structure.

[0021] The beneficial effect of adopting the above further scheme is that the heat exchange tube is formed into a serpentine winding structure, a spiral winding structure or a W-shaped structure, which not only increases the heat exchange area and fully utilizes the space of the water cavity, but also increases the flow time of hydrogen in the heat exchange tube, so that the hydrogen has sufficient time in the heat exchange tube to fully exchange heat with the hot water in the water inlet chamber or the water outlet chamber.

[0022] Furthermore, the heat exchange container includes a plurality of heat exchange fins, an air inlet pipe and an air outlet pipe. The plurality of heat exchange fins are distributed in multiple layers, and the inner cavity of each heat exchange fin is connected to the air inlet pipe and the air outlet pipe.

[0023] Furthermore, the heat exchange container includes a heat exchange tube group, a first circulation chamber and a second circulation chamber, the first circulation chamber and the second circulation chamber are arranged at both ends of the heat exchange tube group, and the heat exchange tube group is connected to the first circulation chamber and the second circulation chamber, the heat exchange tube group includes multiple rows of heat exchange tubes, and the first circulation chamber and the second circulation chamber are respectively provided with an air inlet pipe and an air outlet pipe.

[0024] Furthermore, a temperature sensor is provided in the water inlet chamber and / or the water outlet chamber for real-time monitoring of the water temperature in the water inlet chamber and / or the water outlet chamber.

[0025] Furthermore, a filter and a pressure reducing valve are provided on the pipeline communicating between the hydrogen outlet of the hydrogen storage tank and the hydrogen inlet of the integrated heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0027] Figure 1Schematic diagram of the structure of the heat exchange system of the fuel cell of the present invention;

[0028] Figure 2 It is a schematic diagram of the three-dimensional structure of the integrated heat exchanger of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the interface on the integrated heat exchanger of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the integrated heat exchanger of the present invention, in which the interior of the water inlet chamber is a single winding pipe structure with the winding direction being horizontal;

[0031] Figure 5 for Figure 4 A in the figure shows the enlarged structural diagram;

[0032] Figure 6 Schematic diagram of the three-dimensional structure of the sealing joint;

[0033] Figure 7 This is a schematic structural diagram of the integrated heat exchanger of the present invention, in which the interior of the water inlet chamber is a single winding pipe structure with the winding direction being longitudinal;

[0034] Figure 8 for Figure 7 A top view of

[0035] Figure 9 This is a schematic structural diagram of the integrated heat exchanger of the present invention, in which the water inlet chamber has two winding pipe structures;

[0036] Figure 10 For the present invention Figure 8 The main view;

[0037] Figure 11 This is a schematic structural diagram of the integrated heat exchanger of the present invention, in which the interior of the water inlet chamber is a laminated structure;

[0038] Figure 12 For the present invention Figure 11 The main view;

[0039] Figure 13 For the present invention Figure 11 A top view of

[0040] Figure 14 This is a schematic structural diagram of the integrated heat exchanger of the present invention, in which the interior of the water inlet chamber is a multi-row tube structure;

[0041] Figure 15 For the present invention Figure 14 The main view;

[0042] Figure 16 For the present invention Figure 14 A top view of

[0043] In the figure, 1. integrated heat exchanger; 1.1. core; 1.2. water inlet chamber; 1.3. water outlet chamber; 1.4. water inlet pipe; 1.5. water outlet pipe; 1.6. interface; 1.7. temperature sensor; 1.8. heat exchange tube; 1.9. heat exchange plate; 1.10. air inlet pipe; 1.11. air outlet pipe; 1.12. heat exchange tube group; 1.13. first circulation chamber; 1.14. second circulation chamber; 1.15. sealing joint; 1.151. sealing groove; 1.16. locking nut; 1.17. pipe connector; 2. battery stack; 3. hydrogen storage tank; 4. auxiliary radiator; 5. deionizer; 6. first thermostat; 7. water pump; 8. second thermostat; 9. intercooler; 10. air compressor; 11. hydrogen injector. DETAILED DESCRIPTION

[0044] The principles and features of the present invention are described below with reference to examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention. Specific embodiment one:

[0046] like Figure 1 As shown, a heat exchange system for a fuel cell includes a cell stack 2, an integrated heat exchanger 1 and a hydrogen storage tank 3. The hydrogen storage tank 3 is used to store low-temperature hydrogen. The oxygen required by the cathode plate of the fuel cell can be obtained directly from the air, and the hydrogen storage tank 3 continuously provides hydrogen for the anode plate. The integrated heat exchanger 1 can heat the high-temperature water coming out of the cell stack 2 while also heating the hydrogen, and can be used as a hydrogen heater at the same time. The hydrogen outlet of the hydrogen storage tank 3 is connected to the hydrogen inlet of the integrated heat exchanger 1. The heat exchange container in the integrated heat exchanger 1 heats the low-temperature hydrogen output from the hydrogen storage tank 3. The hydrogen outlet of the integrated heat exchanger 1 is connected to the hydrogen inlet of the cell stack 2, and the high-temperature water outlet of the cell stack 2 is connected to the water inlet of the integrated heat exchanger 1. The integrated heat exchanger 1 dissipates heat and cools the high-temperature water output from the cell stack 2 and then circulates it back into the cell stack 2 to cool the cell stack 2.

[0047] A filter and a pressure reducing valve are further provided on the pipeline communicating between the hydrogen outlet of the hydrogen storage tank 3 and the hydrogen inlet of the integrated heat exchanger 1 .

[0048] More specifically, the heat exchange system of the fuel cell further comprises an auxiliary radiator 4 and a deionizer 5, the auxiliary radiator 4 is used for auxiliary cooling of the high-temperature water in the cell stack 2, and during the operation of the fuel cell, there are some ionic contaminants in the fuel and oxygen, such as sodium ions, potassium ions, chloride ions, etc., which can reduce the efficiency and service life of the fuel cell, and even cause the failure of the fuel cell, the deionizer 5 is used to remove the ionic contaminants in the fuel cell to ensure the normal operation of the fuel cell. The water outlet of the cell stack 2 is divided into three paths, the first path is connected to the water inlet of the integrated heat exchanger 1, the second path is connected to the water inlet of the auxiliary radiator 4, and the third path is connected to the water inlet of the deionizer 5.

[0049] The heat exchange system of the fuel cell further comprises a first thermostat 6, a water pump 7, a second thermostat 8, a intercooler 9 and an air compressor 10, the first thermostat 6, the water pump 7, the second thermostat 8 and the intercooler 9 are connected in series through pipelines, the water outlet of the integrated heat exchanger 1, the water outlet of the auxiliary radiator 4 and the water outlet of the deionizer 5 are connected to the water inlet of the first thermostat 6, the water outlet of the second thermostat 8 is divided into two paths, one path is connected to the low-temperature water inlet of the cell stack 2, and the other path is connected to the water inlet of the intercooler 9, the water outlet of the intercooler 9 is divided into two paths, one path is connected to the water inlet of the integrated heat exchanger 1, and the other path is connected to the water inlet of the auxiliary radiator 4, the air outlet of the air compressor 10 is connected to the air inlet of the intercooler 9, and the air outlet of the intercooler 9 is connected to the oxygen inlet of the cell stack 2. The thermostat is provided with a temperature sensing assembly, which can automatically adjust the water volume according to the temperature of the water, change the circulation range of the water and achieve the effect of adjusting the heat dissipation capacity of the heat exchange system, the water pump 7 is used to pump the water in the first thermostat 6 to the second thermostat 8, a part of the water is directly transported into the cell stack 2 after being adjusted in temperature by the second thermostat 8, and the other part is transported into the intercooler 9 to cool the temperature of the compressed air, and the water output from the intercooler 9 is divided into two paths and enters the integrated heat exchanger 1 and the auxiliary radiator 4 respectively for circulation cooling again.

[0050] The heat exchange system of the fuel cell further comprises a hydrogen ejector 11, which is arranged between the hydrogen outlet of the integrated heat exchanger 1 and the hydrogen inlet of the cell stack 2, and the hydrogen ejector 11 is used to transport the hydrogen heated by the integrated heat exchanger 1 into the cell stack 2.

[0051] As shown in Figures 2-16 The integrated heat exchanger 1 comprises a water radiator body, the water radiator body comprises a core body 1.1 and an inlet water chamber 1.2 and an outlet water chamber 1.3 fixed on both sides of the core body 1.1 respectively, and further comprises a heat exchange container, the heat exchange container is arranged in the cavity of the inlet water chamber 1.2.

[0052] The water inlet chamber 1.2 is provided with a water inlet, and a water inlet pipe 1.4 is installed on the water inlet via a flange. The water outlet chamber 1.3 is provided with a water outlet, and a water outlet pipe 1.5 is installed on the water outlet via a flange. When the heat exchange container is provided in the water inlet chamber 1.2, the water inlet chamber 1.2 is further provided with two or more interfaces 1.6, and the interfaces 1.66 are all connected to the cavity of the water inlet chamber 1.2. The heat exchange container extends out of the water inlet chamber 1.2 through the interfaces 1.6. The location where the heat exchange container is connected to the interfaces 1.6 is sealed with a sealing joint 1.15.

[0053] This embodiment does not limit the structure of the heat exchange container. The heat exchange container can be a single-tube winding structure, a multi-tube structure, a laminated structure, or a multi-row tube structure. For example:

[0054] like Figures 2-6 As shown, the heat exchange container of the single winding tube structure includes a single heat exchange tube 1.8, and the heat exchange tube 1.8 is in a serpentine winding structure. Of course, the heat exchange tube 1.8 can also be in a spiral winding structure or a W-shaped structure. The heat exchange tube 1.8 in a serpentine winding structure, a spiral winding structure or a W-shaped structure can increase the heat exchange area and make full use of the space of the water cavity. When the heat exchange container is a single tube structure, two interfaces 1.6 are provided on the water inlet chamber 1.2, and the two ends of the heat exchange tube 1.8 extend out of the cavity of the water inlet chamber 1.2 through these two interfaces 1.6 respectively, and the interface 1.6 and the heat exchange tube 1.8 are sealed by a sealing joint 1.15 (such as Figure 5 and Figure 6 ), the gas that needs heat exchange enters the heat exchange tube 1.8 through one end of the heat exchange tube, exchanges heat with the medium in the cavity of the water inlet chamber 1.2 in the heat exchange tube 1.8, and is discharged through the other end.

[0055] In addition, this embodiment does not limit the winding direction of the heat exchange tube 1.8, and the heat exchange tube 1.8 can be wound in the horizontal or vertical direction. Figure 4 The heat exchange tube 1.8 shown is wound in a horizontal direction. Figure 7 and 8 The heat exchange tubes 1.8 are shown with the winding direction being the longitudinal direction.

[0056] like Figures 8-9As shown, the heating module of the multi-tube structure comprises a plurality of heat exchange tubes 1.8, each of which is in a serpentine loop structure, and the loop directions of two adjacent heat exchange tubes 1.8 are opposite, so that the heat exchange tube 1.8 structure is arranged compactly. One end of the plurality of heat exchange tubes 1.8 is gathered into an air inlet pipe 1.10 through a pipe connector 1.17 (such as a sleeve), and the other end of the plurality of heat exchange tubes 1.8 is gathered into an air outlet pipe 1.11 through a pipe connector 1.17.

[0057] As shown in the figure, Figures 11-13 The heat exchange container of the laminated structure comprises a plurality of heat exchange sheets 1.9, an air inlet pipe 1.10 and an air outlet pipe 1.11. The plurality of heat exchange sheets 1.9 are distributed in multiple layers, and each heat exchange sheet 1.9 communicates with the air inlet pipe 1.10 and the air outlet pipe 1.11. The water inlet chamber 1.2 is provided with two interfaces 1.6, and the air inlet pipe 1.10 and the air outlet pipe 1.11 respectively extend out of the cavity of the water inlet chamber 1.2 through the two interfaces 1.6. The air inlet pipe 1.10 and the air outlet pipe 1.11 are sealingly connected to the respective interfaces 1.6 through sealing joints 1.15. The gas needing heat exchange enters the inner cavity of the heat exchange sheet 1.9 through the air inlet pipe 1.10, exchanges heat with the medium in the cavity, and then is discharged through the air outlet pipe 1.11.

[0058] As shown in the figure, Figures 14-16 The heat exchange container of the multi-row tube structure comprises a heat exchange tube group 1.12, a first circulation chamber 1.13 and a second circulation chamber 1.14. The first circulation chamber 1.13 and the second circulation chamber 1.14 are arranged at the two ends of the heat exchange tube group 1.12, and the heat exchange tube group 1.12 communicates with the first circulation chamber 1.13 and the second circulation chamber 1.14. The heat exchange tube group 1.12 comprises a plurality of heat exchange tubes 1.8 arranged in sequence in multiple rows. The first circulation chamber 1.13 and the second circulation chamber 1.14 are respectively provided with an air inlet pipe 1.10 and an air outlet pipe 1.11. The water inlet chamber 1.2 is provided with two interfaces 1.6, and the air inlet pipe 1.10 and the air outlet pipe 1.11 respectively extend out of the cavity of the water inlet chamber 1.2 through the two interfaces 1.6. The air inlet pipe 1.10 and the air outlet pipe 1.11 are sealingly connected to the respective interfaces 1.6 through sealing joints 1.15. The gas needing heat exchange enters the heat exchange tube group 1.12 from the first circulation chamber 1.13 through the air inlet pipe 1.10, exchanges heat with the medium in the cavity, enters the second circulation chamber 1.14, and is discharged through the air outlet pipe 1.11.

[0059] The water inlet chamber 1.2 is also provided with a temperature sensor 1.7 for real-time monitoring of the water temperature in the water inlet chamber 1.2.

[0060] The manufacturing method of the integrated heat exchanger 1 of the present invention is as follows: the heat exchange container can be made of 316L stainless steel and is also provided with a sealing joint 1.15. The sealing joint 1.15 is used to seal the heat exchange tube 1.8 and the interface 1.6 on the water inlet chamber 1.2. The heat exchange tube 1.8 and the sealing joint 1.15 can be manufactured by integrated vacuum brazing. This manufacturing method can avoid subsequent argon arc welding and ensure the conductivity and cleanliness of the product. Of course, argon arc welding can also be used. As long as the use requirements are met, it should be within the protection scope of this application; a sealing groove 1.151 and a thread are reserved on the sealing joint 1.15, and the water radiator body adopts a grooved aluminum water chamber structure, and an interface 1.6 integrated with the heat exchange container is reserved; a sealing ring is installed in the sealing groove 1.151, and the sealing joint 1.15 and the interface 1.6 are assembled together through a sealing ring and a locking nut 1.16.

[0061] The integrated heat exchanger 1 of the present invention can not only dissipate heat for the high-temperature water coming out of the battery stack 2 but also realize the heating function of hydrogen, and can be used as a hydrogen heater at the same time. Unlike conventional hydrogen heaters, which include components such as a water side channel, a hydrogen side channel, a hydrogen inlet interface 1.6, a hydrogen outlet interface 1.6, a water inlet interface 1.6, and a water outlet interface 1.6, the present invention only has a hydrogen side channel and a hydrogen inlet and outlet, and has a simple structure.

[0062] The present invention effectively integrates water-cooled heat and hydrogen heaters to fully utilize thermal energy and reduce system layout space, reduce manufacturing, assembly, inspection and maintenance costs, and improve the overall performance of the system. Specific embodiment two:

[0064] Different from the specific embodiment one, the integrated heat exchanger 1 includes a water radiator body, which includes a core 1.1 and a water inlet chamber 1.2 and a water outlet chamber 1.3 respectively fixed on both sides of the water radiator core 1.1, and also includes a heat exchange container. Different from the specific embodiment one, the heat exchange container is arranged in the cavity of the water outlet chamber 1.3.

[0065] A water inlet is provided in the water inlet chamber 1.2, and a water outlet is provided in the water outlet chamber 1.3. When the heat exchange container is provided in the water outlet chamber 1.3, two or more interfaces 1.6 are also provided on the water outlet chamber 1.3. The interfaces 1.6 are all connected to the cavity of the water outlet chamber 1.3. The heat exchange container extends out of the water outlet chamber 1.3 through the interfaces 1.6. The location where the heat exchange container is connected to the interfaces 1.6 is sealed with a sealing structure.

[0066] A temperature sensor 1.7 is further provided in the water outlet chamber 1.3 for real-time monitoring of the water temperature in the water outlet chamber 1.3.

[0067] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heat exchange system for a fuel cell, characterized in that: The invention comprises a battery stack (2), an integrated heat exchanger (1) and a hydrogen storage tank (3) for storing low-temperature hydrogen. The integrated heat exchanger (1) can heat the high-temperature water discharged from the battery stack (2) while also realizing a hydrogen heating function, and can be used as a hydrogen heater at the same time. The hydrogen outlet of the hydrogen storage tank (3) is connected to the hydrogen inlet of the integrated heat exchanger (1). The heat exchange container in the integrated heat exchanger (1) heats the low-temperature hydrogen discharged from the hydrogen storage tank (3). The hydrogen outlet of the integrated heat exchanger (1) is connected to the hydrogen inlet of the battery stack (2). The high-temperature water outlet of the battery stack (2) is connected to the water inlet of the integrated heat exchanger (1). The integrated heat exchanger (1) dissipates the heat of the high-temperature water discharged from the battery stack (2) and then circulates it back into the battery stack (2). The integrated heat exchanger (1) comprises a water radiator body, the water radiator body comprising a core (1.1) and a water inlet chamber (1.2) and a water outlet chamber (1.3) respectively fixed on both sides of the core (1.1), and further comprising a heat exchange container, the heat exchange container being arranged in the cavity of the water inlet chamber (1.2) and / or the cavity of the water outlet chamber (1.3), the water inlet chamber (1.2) being provided with a water inlet, the water outlet chamber (1.3) being provided with a water outlet, the water inlet chamber (1.2) and / or the water outlet chamber (1.3) being provided with a hydrogen inlet and a hydrogen outlet, the hydrogen inlet and the hydrogen outlet being in communication with the heat exchange container; It also includes an auxiliary radiator (4) and a deionizer (5), wherein the auxiliary radiator (4) is used to assist in cooling the high-temperature water in the battery stack (2), and the deionizer (5) is used to remove ion pollutants in the fuel cell to ensure the normal operation of the fuel cell. The water outlet of the battery stack (2) is divided into three paths, the first path is connected to the water inlet of the integrated heat exchanger (1), the second path is connected to the water inlet of the auxiliary radiator (4), and the third path is connected to the water inlet of the deionizer (5); The invention also includes a first thermostat (6), a water pump (7), a second thermostat (8), an intercooler (9) and an air compressor (10). The first thermostat (6), the water pump (7), the second thermostat (8) and the intercooler (9) are connected in series through pipelines. The water outlet of the integrated heat exchanger (1), the water outlet of the auxiliary radiator (4) and the water outlet of the deionizer (5) are all connected to the water inlet of the first thermostat (6). The second thermostat (8) is connected to the water inlet of the first thermostat (6). The water outlet of (8) is divided into two paths and is respectively connected to the low-temperature water inlet of the battery stack (2) and the water inlet of the intercooler (9); the water outlet of the intercooler (9) is divided into two paths and is respectively connected to the water inlet of the integrated heat exchanger (1) and the water inlet of the auxiliary radiator (4); the air outlet of the air compressor (10) is connected to the air inlet of the intercooler (9); and the air outlet of the intercooler (9) is connected to the oxygen inlet of the battery stack (2).

2. The fuel cell heat exchange system according to claim 1, characterized in that: It also includes a hydrogen injector (11), which is arranged between the hydrogen outlet of the integrated heat exchanger (1) and the hydrogen inlet of the battery stack (2), and is used to transport the hydrogen heated by the integrated heat exchanger (1) into the battery stack (2).

3. The heat exchange system of a fuel cell according to claim 1, characterized in that: The water inlet chamber (1.2) is provided with a water inlet, and the water outlet chamber (1.3) is provided with a water outlet. When the heat exchange container is provided in the water inlet chamber (1.2), the water inlet chamber (1.2) is provided with two or more interfaces (1.6), the interfaces (1.6) are all in communication with the cavity of the water inlet chamber (1.2), and the heat exchange container extends out of the water inlet chamber (1.2) through the interfaces (1.6); when the heat exchange container is provided in the water outlet chamber (1.3), the water outlet chamber (1.3) is provided with two or more interfaces (1.6), the interfaces (1.6) are all in communication with the cavity of the water outlet chamber (1.3), and the heat exchange container extends out of the water outlet chamber (1.3) through the interfaces (1.6).

4. The fuel cell heat exchange system according to claim 1, characterized in that: The heat exchange container comprises a single or multiple heat exchange tubes (1.8), and the heat exchange tubes (1.8) are in a serpentine winding structure, a spiral winding structure, or a W-shaped structure.

5. The fuel cell heat exchange system according to claim 1, characterized in that: The heat exchange container comprises a plurality of heat exchange fins (1.9), an air inlet pipe (1.10) and an air outlet pipe (1.11); the plurality of heat exchange fins (1.9) are distributed in multiple layers, and the inner cavity of each heat exchange fin (1.9) is in communication with the air inlet pipe (1.10) and the air outlet pipe (1.11).

6. The fuel cell heat exchange system according to claim 1, characterized in that: The heat exchange container comprises a heat exchange tube group (1.12), a first circulation chamber (1.13) and a second circulation chamber (1.14); the first circulation chamber (1.13) and the second circulation chamber (1.14) are arranged at both ends of the heat exchange tube group (1.12), and the heat exchange tube group (1.12) is in communication with the first circulation chamber (1.13) and the second circulation chamber (1.14); the heat exchange tube group (1.12) comprises multiple rows of heat exchange tubes; the first circulation chamber (1.13) and the second circulation chamber (1.14) are respectively provided with an air inlet pipe (1.10) and an air outlet pipe (1.11).

7. The fuel cell heat exchange system according to claim 1, characterized in that: A temperature sensor (1.7) is also provided in the water inlet chamber (1.2) and / or the water outlet chamber (1.3) for real-time monitoring of the water temperature in the water inlet chamber (1.2) and / or the water outlet chamber (1.3).

8. The fuel cell heat exchange system according to claim 1, characterized in that: A filter and a pressure reducing valve are also provided on the pipeline communicating between the hydrogen outlet of the hydrogen storage tank (3) and the hydrogen inlet of the integrated heat exchanger (1).

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