Gas heat exchange device and hydrogen fuel cell

Abstract

The utility model discloses a gas heat exchange device and a hydrogen fuel cell, and relates to the technical field of hydrogen fuel cells, the gas heat exchange device comprises a hydrogen preheater, an intercooler and a circulating pump; the hydrogen preheater is connected with the circulating pump through a preheater water inlet pipe, the intercooler is connected with the hydrogen preheating device through a preheater water outlet pipe, and finally, the intercooler is connected with the circulating pump through an intercooler water outlet pipe to form a circulating loop; cooling liquid of the gas heat exchange device absorbs heat in the intercooler through the circulation loop and is conveyed to the hydrogen preheating device through the circulation pump to preheat hydrogen entering the hydrogen fuel cell system. The gas heat exchange device disclosed by the utility model can effectively solve the technical problems that the power of a hydrogen fuel cell heat management system is insufficient, the air temperature cannot reach the preset temperature, and the temperature of a hydrogen circulation loop is uncontrollable.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen fuel cell system field, more specifically, it relates to a gas heat exchange device and hydrogen fuel cell. BACKGROUND

[0002] As one of the important technical routes of new energy vehicles, hydrogen fuel cell vehicles have been widely concerned and researched due to their zero emission, high efficiency, safety and other advantages. However, to realize commercialization of hydrogen fuel cell vehicles, many technical problems need to be overcome.

[0003] The fuel cell reaction gas supply system includes air supply and hydrogen supply. When low-temperature hydrogen directly enters the stack, water vapor is easy to condense into water droplets when it is cold, which can cause obvious attenuation of the hydrogen fuel cell system after long-term use, reducing the battery life. When the air entering the fuel cell is compressed, the temperature will rise above the stable working state of the fuel cell. In order to prevent damage to the membrane electrode of the fuel cell, a intercooler needs to be set before the compressed air enters the stack to cool the air.

[0004] At present, due to the insufficient power of the thermal management system, the cooling effect of the air is not ideal, and the air temperature often cannot reach the predetermined temperature.

[0005] In addition, the existing technology often uses the waste heat of the stack reaction to heat hydrogen, and the air uses a separate cooling cycle, which has a complex cooling structure and low system energy efficiency. UTILITY MODEL CONTENT

[0006] Therefore, the main problem solved by the utility model is the technical problem of complex structure and low energy efficiency of the fuel cell hydrogen heating and air cooling system.

[0007] To solve the above problems, the utility model provides a gas heat exchange device, which comprises a hydrogen preheater, an intercooler, a circulating pump, a preheater water inlet pipe, a hydrogen preheater water outlet pipe and an intercooler water outlet pipe.

[0008] The hydrogen preheater has a cooling liquid heat release circuit and a hydrogen heating circuit formed inside; the intercooler has a cooling liquid heat absorption circuit and an air heat release circuit formed inside; the circulating pump, the preheater water inlet pipe, the hydrogen preheater, the hydrogen preheater water outlet pipe, the intercooler and the intercooler water outlet pipe are sequentially connected to form a circulating heating circuit.

[0009] Further, the first outer surface of the hydrogen preheater is provided with a hydrogen inlet, a hydrogen outlet, a cooling liquid inlet and a cooling liquid outlet; the hydrogen outlet and the cooling liquid inlet are arranged on one side of the hydrogen preheater, and the hydrogen inlet and the cooling liquid outlet are arranged on the other side of the hydrogen preheater.

[0010] Further, one end of the preheater water inlet pipe is connected with the cooling liquid inlet, and the other end is connected with the water outlet of the circulating pump.

[0011] Further, the hydrogen preheater is internally provided with a hydrogen heating pipe, the first shell is internally formed with a cooling liquid heat exchange cavity, the hydrogen heating pipe is completely wrapped in the cooling liquid heat exchange cavity, two ends of the hydrogen heating pipe are respectively connected with the hydrogen inlet and the hydrogen outlet, and the cooling liquid inlet and the cooling liquid outlet are in communication with the cooling liquid heat exchange cavity.

[0012] Further, the height of the cooling liquid outlet of the hydrogen preheater is higher than that of the cooling liquid inlet.

[0013] Further, the hydrogen heating pipe is in a serpentine structure or a spiral structure.

[0014] Further, the preheater water inlet pipe, the hydrogen preheater water outlet pipe and the intercooler water outlet pipe are made of silica gel material.

[0015] Further, the hydrogen heating pipe is made of aluminum alloy or copper material.

[0016] The utility model also provides a hydrogen fuel cell which comprises the above-mentioned gas heat exchange device.

[0017] Compared with the prior art, the utility model has the advantages and effects that:

[0018] By means of the gas heat exchange device, the heating of hydrogen required by the fuel cell and the cooling of air are realized, two other different heat exchange requirements are effectively utilized, and under the condition that the system itself is not greatly changed, the cooling effect on the air system is improved, the hydrogen temperature is increased, and the service life of the electric pile is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0020] Figure 1 The system principle diagram of the gas heat exchange device in the embodiment of the utility model;

[0021] Figure 2 The three-dimensional structure schematic view of the gas heat exchange device in the embodiment of the utility model;

[0022] Figure 3 It is the external structure schematic view of the hydrogen preheater in the embodiment of the utility model;

[0023] Figure 4 It is the internal structure schematic view of the hydrogen preheater in the embodiment of the utility model.

[0024] Mark explanation:

[0025] 1-hydrogen preheater;2-preheater water inlet pipe;3-preheater water outlet pipe;4-intercooler;5-intercooler water outlet pipe;6-circulating pump;101-hydrogen inlet;102-hydrogen outlet;103-cooling liquid inlet;104-cooling liquid outlet;105-first shell;106-cooling liquid heat exchange cavity;107-hydrogen heating pipe. Specific implementation

[0026] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below with reference to the drawings.

[0027] In the description of the utility model, it should be explained that, unless there is explicit provision and limitation, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integrally connected;It can be mechanical connection;It can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements.For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0028] In the description of the specification, the description of reference terms "embodiment", "one embodiment" and "one embodiment" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or embodiment are contained in at least one embodiment or embodiment of the utility model.In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or embodiment.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or embodiments in a suitable manner.

[0029] Please refer to Figures 1-4 The utility model embodiment provides a gas heat exchange device, the gas heat exchange device includes hydrogen preheater 1, intercooler 4, circulating pump 6, preheater water inlet pipe 2, hydrogen preheater water outlet pipe 3 and intercooler water outlet pipe 5, wherein:

[0030] The hydrogen preheater 1 is internally formed with a cooling liquid heat release circuit and a hydrogen heating circuit; the intercooler 4 is internally formed with a cooling liquid heat absorption circuit and an air heat release circuit; the circulating pump 6, the preheater water inlet pipe 2, the hydrogen preheater 1, the hydrogen preheater water outlet pipe 3, the intercooler 4 and the intercooler water outlet pipe 5 are sequentially communicated to form a circulating heating circuit.

[0031] It should be noted that the cooling liquid heat release circuit and the hydrogen heating circuit formed in the hydrogen preheater 1 are two independent circuits that are not communicated with each other, and the cooling liquid heat absorption circuit and the air heat release circuit formed in the intercooler 4 are also two independent circuits that are not communicated with each other.

[0032] In an optional embodiment of the present application, the first shell 105 of the hydrogen preheater 1 is externally provided with a hydrogen inlet port 101, a hydrogen outlet port 102, a cooling liquid inlet port 103 and a cooling liquid outlet port 104; the hydrogen outlet port 102 and the cooling liquid inlet port 103 are arranged on one side of the hydrogen preheater 1, and the hydrogen inlet port 101 and the cooling liquid outlet port 104 are arranged on the other side of the hydrogen preheater 1.

[0033] Specifically, as shown in Figure 3 , 4 In the present embodiment, the hydrogen outlet port 102 and the cooling liquid inlet port 103 are arranged on the same side of the hydrogen preheater 1, so that the cooling liquid at the hydrogen outlet port 102 has a higher temperature, thereby ensuring the heating effect of the hydrogen.

[0034] In an optional embodiment of the present application, one end of the preheater water inlet pipe 2 is connected with the cooling liquid inlet port 103, and the other end is connected with the water outlet of the circulating pump 6.

[0035] In the present embodiment, the preheater water inlet pipe 2 is connected with the cooling liquid inlet port 103 and the water outlet of the circulating pump 6, and the cooling liquid first passes through the circulating pump 6, so that the circulating pump 6 works on the cooling liquid, thereby further increasing the temperature of the cooling liquid entering the hydrogen preheater 1 and improving the heating efficiency of the hydrogen.

[0036] In an optional embodiment of the present application, the hydrogen preheater 1 is internally provided with a hydrogen heating pipe 107, the first shell 105 is internally formed with a cooling liquid heat exchange cavity 106, and the hydrogen heating pipe 107 is completely wrapped in the cooling liquid heat exchange cavity 106; the two ends of the hydrogen heating pipe 107 are respectively connected with the hydrogen inlet port 101 and the hydrogen outlet port 102, and the cooling liquid inlet port 103 and the cooling liquid outlet port 104 are both in communication with the cooling liquid heat exchange cavity 106.

[0037] In an optional embodiment of the present application, the setting height of the cooling liquid outlet port 104 of the hydrogen preheater 1 is higher than the setting height of the cooling liquid inlet port 103.

[0038] In the embodiment, when the hydrogen preheater 1 is arranged, the cooling liquid outlet 104 of the hydrogen preheater 1 is arranged higher than the arrangement height of the cooling liquid inlet 103, so that the cooling liquid enters from the lower end of the hydrogen preheater 1 and then is discharged from the upper end, the whole cooling liquid heat exchange cavity 106 is filled with the cooling liquid, and better heat exchange effect is achieved.

[0039] In an optional embodiment of the utility model, the hydrogen heating pipe 107 is in a serpentine structure or a spiral structure, and is made of aluminum alloy or copper material.

[0040] In the embodiment, the hydrogen heating pipe 107 is S-shaped or spiral, the heat exchange area is increased, the hydrogen heat exchange is better, the hydrogen heating pipe 107 is made of aluminum alloy or copper and other metal materials with better introduction, and the heat exchange efficiency of the hydrogen preheater 1 is accelerated; the hydrogen heating pipe 107 can further be provided with fins outside to increase the heat exchange area.

[0041] In an optional embodiment of the utility model, the preheater water inlet pipe 2, the hydrogen preheater water outlet pipe 3 and the intercooler water outlet pipe 5 are made of food-grade silica gel material.

[0042] The utility model also provides a hydrogen fuel cell which comprises the above-mentioned gas heat exchange device. The hydrogen fuel cell has the same advantages as the gas heat exchange device, and will not be described in detail here.

[0043] Although the utility model discloses as above, the utility model is not limited to this. Any person skilled in the art, under the premise of not departing from the utility model concept, can also make several deformation and improvement, these all belong to the protection scope of the utility model, therefore the protection scope of the utility model patent should be the range limited by the claim.

Claims

1. A gas heat exchange device, characterized by, The hydrogen preheater (1), the intercooler (4), the circulating pump (6), the preheater water inlet pipe (2), the hydrogen preheater water outlet pipe (3) and the intercooler water outlet pipe (5) are sequentially connected to form a circulating heating loop. The hydrogen preheater (1) is internally provided with a cooling liquid heat release loop and a hydrogen heating loop; the intercooler (4) is internally provided with a cooling liquid heat absorption loop and an air heat release loop; the circulating pump (6), the preheater water inlet pipe (2), the hydrogen preheater (1), the hydrogen preheater water outlet pipe (3), the intercooler (4) and the intercooler water outlet pipe (5) are sequentially connected to form a circulating heating loop.

2. The gas heat exchange device of claim 1, wherein The first shell (105) of the hydrogen preheater (1) is externally provided with a hydrogen inlet (101), a hydrogen outlet (102), a cooling liquid inlet (103) and a cooling liquid outlet (104); the hydrogen outlet (102) and the cooling liquid inlet (103) are arranged on one side of the hydrogen preheater (1), and the hydrogen inlet (101) and the cooling liquid outlet (104) are arranged on the other side of the hydrogen preheater (1).

3. The gas heat exchange device of claim 2, wherein One end of the preheater water inlet pipe (2) is connected to the cooling liquid inlet (103), and the other end is connected to the water outlet of the circulating pump (6).

4. The gas heat exchange device of claim 3, wherein The hydrogen preheater (1) is internally provided with a hydrogen heating pipe (107), and the first shell (105) is internally formed with a cooling liquid heat exchange cavity (106), wherein the hydrogen heating pipe (107) is completely wrapped in the cooling liquid heat exchange cavity (106); both ends of the hydrogen heating pipe (107) are connected to the hydrogen inlet (101) and the hydrogen outlet (102), respectively, and the cooling liquid inlet (103) and the cooling liquid outlet (104) are both connected to the cooling liquid heat exchange cavity (106).

5. The gas heat exchange device of claim 4, wherein The height of the cooling liquid outlet (104) of the hydrogen preheater (1) is higher than the height of the cooling liquid inlet (103).

6. The gas heat exchange device of claim 5, wherein The hydrogen heating pipe (107) is in a serpentine structure or a spiral structure.

7. The gas heat exchange device of claim 2, wherein The preheater water inlet pipe (2), the hydrogen preheater water outlet pipe (3) and the intercooler water outlet pipe (5) are made of silica gel material.

8. The gas heat exchange device of claim 4, wherein The hydrogen heating pipe (107) is made of aluminum alloy or copper material.

9. A hydrogen fuel cell characterized by The gas heat exchange device as claimed in any one of claims 1-8. The gas heat exchange device as claimed in any one of claims 1-8.

Images