SOFC system structure

Abstract

The utility model relates to the technical field of solid oxide fuel cells, in particular to a solid oxide fuel cell (SOFC) system structure which comprises an inner frame and an outer frame, the inner frame is arranged in the outer frame, a heat preservation layer is arranged between the inner frame and the outer frame, and a cell and an air inlet system are arranged on the outer frame. The air inlet system comprises an anode air inlet system and a cathode air inlet system, a reformer, an electric pile, a combustion chamber and a heat exchanger are arranged in the inner frame, the reformer, the electric pile, the combustion chamber and the heat exchanger are sequentially connected, the anode air inlet system is connected with an anode of the electric pile through the reformer, and the cathode air inlet system is connected with a cathode of the electric pile through the heat exchanger. The cathode air inlet system is connected with the cathode of the electric pile through the heat exchanger, and the battery is connected with the electric pile. Under the condition that the heat of the electric pile and the combustion chamber is fully utilized, the whole structure is compact, and the size is small.

Description

TECHNICAL FIELD

[0001] The utility model relates to solid oxide fuel cell technical field, concretely relates to a SOFC system structure. BACKGROUND

[0002] Solid oxide fuel cell (SOFC) is a kind of power generation device that converts the chemical energy of hydrogen and other fuels into electrical energy directly, with high energy conversion efficiency, environmental friendly and other characteristics.SOFC can be assembled by modules to meet the needs of portable devices, and with the continuous progress of technology, the size and weight of SOFC device are gradually reduced, which is more convenient to carry and use.

[0003] The utility model discloses a portable solid oxide fuel cell device, including gas supply assembly, heat exchange mechanism, battery assembly, gas supply assembly, heat exchange mechanism, battery assembly are sequentially close from bottom to top Arrangement, with the advantages of compact structure, small size, high efficiency, high energy utilization rate.But the heat of the heat exchange mechanism of the portable solid oxide fuel cell device is only provided by the tail gas generated by the reaction of fuel in the battery assembly, and part of the heat cannot be utilized. UTILITY MODEL CONTENTS

[0004] The utility model discloses a SOFC system structure, which solves the defects of the prior art, ensures the full utilization of the heat of the stack and the combustion chamber, and makes the whole structure compact and small in size.

[0005] In order to solve the above technical problems, the utility model provides a SOFC system structure, which comprises an inner frame and an outer frame, the inner frame is arranged in the outer frame, a heat preservation layer is arranged between the inner frame and the outer frame, a battery and an air inlet system are arranged on the outer frame, the air inlet system comprises an anode air inlet system and a cathode air inlet system, a reformer, a stack, a combustion chamber and a heat exchanger are arranged in the inner frame, the reformer, the stack, the combustion chamber and the heat exchanger are connected in sequence, the anode air inlet system is connected with the anode of the stack through the reformer, the cathode air inlet system is connected with the cathode of the stack through the heat exchanger, and the battery is connected with the stack.

[0006] In some embodiments, the outer frame is in the shape of a cuboid, the stack, the combustion chamber and the heat exchanger are arranged in sequence along the length direction of the outer frame, the air inlet system is arranged on one side of the outer frame along the width direction, the gas outlet of the anode air inlet system is connected with the anode of the stack from the side surface of the outer frame, the gas outlet of the cathode air inlet system is connected with the heat exchanger from the end surface of the outer frame along the length direction, and the battery is arranged on the top of the outer frame.

[0007] In some embodiments, the anode gas inlet system is connected with a fuel tank, the fuel tank is arranged at one end of the outer frame along the length direction, and the gas outlet of the cathode gas inlet system and the storage tank are arranged at two ends of the outer frame along the length direction respectively.

[0008] In some embodiments, a current collecting plate is arranged on the outer frame, the current collecting plate is arranged on the top of the outer frame, and the battery is connected with the stack through the current collecting plate.

[0009] In some embodiments, a heat dissipation module is arranged at one end of the outer frame close to the heat exchanger, and the heat dissipation module is fixed on the outer frame through a support.

[0010] In some embodiments, the heat exchanger is connected with an air inlet pipe, an air outlet pipe and a tail gas pipe, the air inlet pipe is connected with the gas outlet of the cathode gas inlet system, and the air outlet pipe is connected with the cathode of the stack.

[0011] In some embodiments, the outer frame comprises an upper frame, a lower frame and a plurality of columns, the upper frame and the lower frame are connected through the columns, a plurality of supporting feet are arranged on the lower frame, and the supporting feet are used for fixing the air inlet system.

[0012] In some embodiments, the inner frame is nested in the outer frame, and the outer frame tightly fixes the inner frame through the thermal insulation layer.

[0013] In some embodiments, the upper frame and the lower frame are connected with two ends of the column through bolts respectively.

[0014] In some embodiments, a plurality of fixing holes and fixing belts are arranged on the upper frame, two ends of the fixing belt are fixed on the fixing hole, and the fixing belt tightly fixes the battery on the top of the upper frame away from the heat exchanger.

[0015] The utility model discloses the beneficial effects are:

[0016] 1. Compared with the prior art adopting the structure of upper and lower layers, the utility model adopts the inner and outer layer arrangement framework, arranges the reformer, the stack and the heat exchanger needing heat in the inner frame, and sets up the battery and the air inlet system on the outer frame, so that the structure is more compact, and the structure in the inner frame is isolated from the outside by the thermal insulation layer, so that they can be quickly heated to respective working temperatures, the system energy utilization rate is improved, and the starting time is reduced.

[0017] 2. The thermal insulation layer of the utility model isolates the inner frame from the outside, so that the temperature of the outer frame is reduced by 200 DEG C compared with the temperature of the inner frame, which is beneficial to the material selection of the outer frame system parts and the cost reduction.

[0018] 3. The battery of the utility model is fixed on the top of the upper frame away from the heat exchanger through the fixing belt, so that the high-temperature tail gas discharged by the heat exchanger does not affect the battery. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the outer frame of this utility model;

[0020] Figure 2 This is a schematic diagram of the inner frame and insulation layer of this utility model;

[0021] Figure 3 This is a schematic diagram of the connection structure of the fuel cell stack, combustion chamber, and heat exchanger of this utility model.

[0022] Figure 4 This is a diagram showing the arrangement of the battery, current collector, air intake system, and heat dissipation module on the outer frame of this utility model.

[0023] Reference numerals: Outer frame 1; Upper frame 11; Lower frame 12; Column 13; Fixing strap 14; Support leg 15; Inner frame 2; Fuel cell stack 3; Combustion chamber 4; Heat exchanger 5; Inlet pipe 51; Outlet pipe 52; Exhaust pipe 53; Inlet system 6; Anode inlet system 61; Cathode inlet system 62; Current collector 71; Battery 72; Heat dissipation module 8; Insulation layer 9. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0025] like Figure 1 , 2 As shown, this utility model provides an SOFC system structure, including an inner frame 2 and an outer frame 1. The inner frame 2 is arranged inside the outer frame 1, and an insulation layer 9 is provided between the inner frame 2 and the outer frame 1. Figure 4 As shown, the outer frame 1 houses the battery 72 and the air intake system 6, which includes an anode air intake system 61 and a cathode air intake system 62. The inner frame 2 houses the reformer, the fuel cell stack 3, the combustion chamber 4, and the heat exchanger 5. Figure 3 As shown, the reformer, fuel cell stack 3, combustion chamber 4, and heat exchanger 5 are connected in sequence. Figure 3 The reformer is not shown in the diagram. The anode air intake system 61 is connected to the anode of the fuel cell stack 3 through the reformer, and the cathode air intake system 62 is connected to the cathode of the fuel cell stack 3 through the heat exchanger 5. The battery 72 is connected to the fuel cell stack 3. The insulation layer 9 can be made of aerogel insulation material (a thermal protection material made of fiber preform and alumina ceramic aerogel composite), which can withstand high temperatures of 1500℃.

[0026] It can be understood that, relative to the prior art using the upper and lower stacked structure, the utility model uses the internal and external arrangement framework, the reformer, the electric pile 3, the heat exchanger 5 that need heat are arranged in the internal frame 2, the battery 72 and the air intake system 6 are set up on the external frame 1, the structure is more compact, and the structure in the internal frame 2 is isolated from the outside by using the heat preservation layer 9, so that they can be heated to respective working temperatures quickly, improve the system energy utilization rate, and reduce the start-up time.

[0027] In some embodiments, as shown in Figure 1 , the external frame 1 is cuboid, as shown in Figure 3 , the electric pile 3, the combustion chamber 4 and the heat exchanger 5 are sequentially arranged along the length direction of the external frame 1, that is, the electric pile 3 and the heat exchanger 5 are respectively close to the left and right ends of the external frame 1, the combustion chamber 4 is arranged between the electric pile 3 and the heat exchanger 5, and the reformer can be arranged on the side of the electric pile 3, so that the arrangement structure is compact, and the volumes of the internal frame 2 and the external frame 1 are small. Figure 4 As shown in Figure 4 , the air intake system 6 is arranged on one side of the external frame 1 along the width direction, the air outlet of the anode air intake system 61 is connected with the anode of the electric pile 3 from the side of the external frame 1, the air outlet of the cathode air intake system 62 is connected with the heat exchanger 5 from the end face of the external frame 1 along the length direction (that is, the right end face of the external frame 1), and the battery 72 is arranged on the top of the external frame 1.

[0028] In some embodiments, the anode air intake system 61 is connected with a fuel tank, the fuel tank is arranged on one end of the external frame 1 along the length direction (that is, the left end of the external frame 1, Figure 4 , the fuel tank is not shown in Figure 4 , the air outlet of the cathode air intake system 62 and the storage tank are arranged on the two ends of the external frame 1 along the length direction respectively. The fuel tank can also be arranged on the side opposite to the air intake system 6, and the fuel tank can be in the form of a plate to reduce the occupied space of the whole device.

[0029] In some embodiments, as shown in Figure 4 , a current collecting plate 71 is arranged on the external frame 1, the current collecting plate 71 is arranged on the top of the external frame 1, and the battery 72 is connected with the electric pile 3 through the current collecting plate 71. Since the voltage output by the electric pile 3 is unstable, the current collecting plate 71 is used for rectification. Among them, the battery 72 is arranged away from the heat exchanger 5, and the current collecting plate 71 is arranged close to the heat exchanger 5, so that the high-temperature exhaust gas discharged by the heat exchanger 5 does not affect the battery 72.

[0030] In some embodiments, as shown in Figure 4 , a heat dissipation module 8 is arranged on one end of the external frame 1 close to the heat exchanger 5, and the heat dissipation module 8 is fixed on the external frame 1 through a support. The heat dissipation module 8 comprises a heat dissipation fan.

[0031] In some embodiments, as shown in Figure 3As shown, the heat exchanger 5 is connected with an air inlet pipe 51, an air outlet pipe 52 and an exhaust pipe 53, the air inlet pipe 51 is connected with an air outlet of the cathode air supply system 62, and the air outlet pipe 52 is connected with the cathode of the stack 3, so that the air in the cathode air supply system 62 is preheated by the heat exchanger 5 and then enters the cathode of the stack 3 through the air outlet pipe 52.

[0032] In some embodiments, as shown in Figure 1 As shown, the outer frame 1 includes an upper frame 11, a lower frame 12 and a plurality of columns 13, the upper frame 11 and the lower frame 12 are connected through the columns 13, and a plurality of support feet 15 are arranged on the lower frame 12, which are used to fix the air supply system 6.

[0033] In some embodiments, the upper frame 11 and the lower frame 12 are both welded by a bottom plate and four side plates around the bottom plate, the bottom plate and the side plates are arranged vertically, a plurality of weight-reducing holes are arranged on the bottom plate to reduce the weight of the whole structure, and mounting holes can be arranged on the bottom plate and the side plates to mount the air supply system 6, the battery 72 and the current collector plate 71.

[0034] In some embodiments, the upper frame 11 and the lower frame 12 are respectively connected with both ends of the column 13 through bolts.

[0035] In some embodiments, the inner frame 2 is nested in the outer frame 1, and the outer frame 1 presses and fixes the inner frame 2 through the thermal insulation layer 9, that is, no additional connecting structure is needed between the inner frame 2 and the outer frame 1, and the thickness of the thermal insulation layer 9 is only slightly larger than the gap between the inner frame 2 and the outer frame 1, so that the inner frame 2 and the outer frame 1 are pressed against each other to fix the inner frame 2. In addition, the inner frame 2 and the outer frame 1 can also be fixed by bolts to further ensure the stability of the inner frame 2.

[0036] It should be noted that the inner frame 2 can adopt the same structure as the outer frame 1, which can ensure that the reformer, the stack 3, the combustion chamber 4 and the heat exchanger 5 can be stably fixed in the inner frame 2. The inner frame 2 needs to withstand the temperature of 800℃ when the stack 3 is running, and should be made of high-temperature-resistant materials such as stainless steel or ceramic materials; the temperature of the outer frame 1 is reduced by 200℃ compared with the temperature of the inner frame 2, which is beneficial to the selection of materials for the outer frame 1 and other structures fixed on the outer frame 1.

[0037] In some embodiments, as shown in Figure 4 As shown, a plurality of fixing holes and fixing belts 14 are arranged on the upper frame 11, both ends of the fixing belt 14 are fixed in the fixing hole, and the fixing belt 14 presses and fixes the battery 72 on the top of the upper frame 11 away from the heat exchanger 5. In this embodiment, the fixing belt 14 and the fixing hole can be connected by bolts or connecting buckles.

[0038] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A SOFC system architecture, characterized by: The application relates to a fuel cell system, which comprises an inner frame (2) and an outer frame (1), the inner frame (2) is arranged in the outer frame (1), a heat preservation layer (9) is arranged between the inner frame (2) and the outer frame (1), a battery (72) and an air intake system (6) are arranged on the outer frame (1), the air intake system (6) comprises an anode air intake system (61) and a cathode air intake system (62), a reformer, an electric pile (3), a combustion chamber (4) and a heat exchanger (5) are arranged in the inner frame (2), the reformer, the electric pile (3), the combustion chamber (4) and the heat exchanger (5) are sequentially connected, the anode air intake system (61) is connected with the anode of the electric pile (3) through the reformer, the cathode air intake system (62) is connected with the cathode of the electric pile (3) through the heat exchanger (5), and the battery (72) is connected with the electric pile (3).

2. The SOFC system architecture of claim 1, wherein: The outer frame (1) is in the shape of a cuboid, the electric pile (3), the combustion chamber (4) and the heat exchanger (5) are sequentially arranged along the length direction of the outer frame (1), the air intake system (6) is arranged on one side of the outer frame (1) along the width direction, the air outlet of the anode air intake system (61) is connected with the anode of the electric pile (3) from the side of the outer frame (1), the air outlet of the cathode air intake system (62) is connected with the heat exchanger (5) from the end surface of the outer frame (1) along the length direction, and the battery (72) is arranged on the top of the outer frame (1).

3. The SOFC system architecture of claim 2, wherein: The anode air intake system (61) is connected with a fuel tank, the fuel tank is arranged at one end of the outer frame (1) along the length direction, and the air outlet of the cathode air intake system (62) and a storage tank are arranged at two ends of the outer frame (1) along the length direction respectively.

4. The SOFC system architecture of any one of claims 1 to 3, wherein: A current collecting plate (71) is arranged on the outer frame (1), the current collecting plate (71) is arranged on the top of the outer frame (1), and the battery (72) is connected with the electric pile (3) through the current collecting plate (71).

5. The SOFC system architecture of any one of claims 1 to 3, wherein: A heat dissipation module (8) is arranged at one end of the outer frame (1) close to the heat exchanger (5), and the heat dissipation module (8) is fixed on the outer frame (1) through a support.

6. The SOFC system architecture of any one of claims 1 to 3, wherein: The heat exchanger (5) is connected with an air inlet pipe (51), an air outlet pipe (52) and an exhaust pipe (53), the air inlet pipe (51) is connected with the air outlet of the cathode air intake system (62), and the air outlet pipe (52) is connected with the cathode of the electric pile (3).

7. The SOFC system architecture of any one of claims 1 to 3, wherein: The outer frame (1) comprises an upper frame (11), a lower frame (12) and a plurality of columns (13), the upper frame (11) and the lower frame (12) are connected through the columns (13), a plurality of supporting legs (15) are arranged on the lower frame (12), and the supporting legs (15) are used for fixing the air intake system (6).

8. The SOFC system architecture of claim 7, wherein: The inner frame (2) is nested in the outer frame (1), and the outer frame (1) tightly fixes the inner frame (2) through the heat preservation layer (9).

9. The SOFC system architecture of claim 7, wherein: The upper frame (11) and the lower frame (12) are respectively connected with two ends of the column (13) through bolts.

10. The SOFC system architecture of claim 7, wherein: The upper frame (11) is provided with a plurality of fixing holes and fixing belts (14), two ends of the fixing belts (14) are fixed on the fixing holes, and the fixing belts (14) tightly fix the battery (72) on the top of the upper frame (11) away from the heat exchanger (5).

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