A hybrid power system and method of a fuel cell and a cylinder engine

Abstract

The present invention discloses a hybrid power system of a fuel cell and a cylinder engine, comprising: a fuel tank, a stack box and a cylinder engine for driving a driving wheel to rotate, which are connected in sequence; a driving motor for assisting in driving the driving wheel to rotate is connected to the outside of the stack box; an air preheater is connected to the cathode of the stack box, and a heating structure for heating the air inside the air is provided on the air preheater, and the exhaust gas output end of the cylinder engine is connected to the heating structure of the air preheater through a pipeline. The present invention also discloses a method for recovering waste heat from exhaust gas and a method for starting the hybrid power system of the fuel cell and the cylinder engine. The structural design of the present invention is reasonable and ingenious, and the exhaust gas of the cylinder engine is used as a heat source for the cathode and cathode gases of the stack box, thereby reducing the loss of the entire hybrid power system; the energy of different grades in each stage is utilized in a stepped manner to achieve efficient conversion of energy in each temperature range, and the heat of the exhaust gas is further utilized, thereby improving the cycle efficiency of the present invention.

Description

Technical Field

[0001] The present invention relates to a vehicle power system, and in particular to a hybrid power system of a fuel cell and a cylinder engine and a method thereof. Background Art

[0002] SOFC fuel cell is an all-solid-state chemical power generation device that directly converts the chemical energy stored in fuel and oxidant into electrical energy in an efficient and environmentally friendly manner at medium and high temperatures.

[0003] With the increasing requirements for automobile fuel economy and environmental protection, and the introduction of my country's 863 Plan, automobile power systems will gradually transition from the current focus on fossil fuels such as gasoline to hybrid power.

[0004] The efficiency of traditional automobile internal combustion engines is up to 35%, and most of the energy is taken away through exhaust gas. Most of the hybrid systems currently on the market have not been improved to address this problem. Although they have met environmental protection requirements, the large amount of energy waste in exhaust gas has not been solved.

[0005] Now, we have launched a hybrid power system of fuel cell and cylinder engine for the reuse of internal combustion engine exhaust gas and the improvement of system cycle efficiency. Summary of the invention

[0006] In order to solve the above problems, the present invention discloses a hybrid power system and method of a fuel cell and a cylinder engine.

[0007] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0008] A hybrid power system of a fuel cell and a cylinder engine comprises: a fuel tank, a stack box and a cylinder engine for driving a driving wheel connected in sequence; the stack box is externally connected to a driving motor for assisting in driving the driving wheel; an air preheater is connected to the cathode of the stack box, the air preheater is provided with a heating structure for heating the air inside the air preheater, and the exhaust gas output end of the cylinder engine is connected to the heating structure of the air preheater through a pipeline.

[0009] It also includes a reforming reactor; the fuel tank is connected to the input end of the reforming reactor, and the output end of the reforming reactor is connected to the anode of the stack box; a heating chamber is also provided on the reforming reactor, the exhaust output end of the cylinder engine is connected to the heating chamber through a pipeline, and the output end of the heating chamber is connected to the heating structure of the air preheater.

[0010] It also includes a water tank and a water pump which are connected in sequence; the output end of the water pump is connected to one end of the cylinder sleeve of the cylinder engine through a pipeline, and the other end of the cylinder sleeve is connected to the input end of the reforming reactor through a pipeline.

[0011] The input end of the reforming reactor is also connected to a protective gas delivery pipeline.

[0012] The fuel tank is connected to a fuel pump, and the output end of the fuel pump is connected to the reforming reactor and the cylinder engine through a first branch and a second branch respectively; the first branch and the second branch are respectively provided with a solenoid valve and a check valve according to the fuel delivery direction; the second branch is also provided with an atomizer and a backfire preventer.

[0013] A supercapacitor is connected to the outside of the battery stack box, and the drive motor is connected to the supercapacitor.

[0014] A method for recovering waste heat from exhaust gas implemented according to the hybrid power system of the fuel cell and the cylinder engine comprises:

[0015] The exhaust gas generated when the cylinder engine is running is transported from the exhaust gas output end of the cylinder engine to the heating chamber of the reforming reactor to provide heat for the reforming reaction in the reforming reactor;

[0016] The exhaust gas is then transported from the heating chamber to the heating structure of the air preheater, provides heat to the air in the air preheater, and is then discharged.

[0017] A method for starting a hybrid power system of a fuel cell and a cylinder engine comprises the following steps:

[0018] Step 1: The protective gas is transported to the reforming reactor through the protective gas delivery pipeline and then input into the fuel cell stack box;

[0019] The fuel tank directly passes the fuel from the second branch into the cylinder engine through the fuel pump, and the drive wheel is driven to rotate by the cylinder engine; the exhaust gas generated by the operation of the cylinder engine is transported from the exhaust gas output end of the cylinder engine to the heating chamber of the reforming reactor to heat the protective gas in the reforming reactor; the heated protective gas is input into the stack box to gradually heat up the stack box.

[0020] Step 2: When the temperature of the stack box rises to the set temperature, the shielding gas delivery pipeline stops delivering shielding gas; the fuel tank inputs the fuel into the reforming reactor from the first branch through the fuel pump, the reforming reactor inputs hydrogen-rich gas into the anode of the stack box, and the gas storage tank inputs high-pressure air into the air preheater for heating, and then delivers it to the cathode of the stack box;

[0021] Step three: the stack box generates electricity, and the drive motor assists in driving the drive wheel to rotate. The unreacted gas in the stack box is input into the cylinder engine to continue burning and doing work.

[0022] The exhaust gas generated by the operation of the cylinder engine is transported from the heating chamber of the reforming reactor to the heating structure of the air preheater, and is discharged after heating the air preheater;

[0023] In the step 1, the water tank delivers deionized water to the cylinder liner of the cylinder engine through a water pump, so that the cylinder engine is cooled and then discharged;

[0024] In the step 2, the water storage tank delivers deionized water to the cylinder liner of the cylinder engine through a water pump, so that the cylinder engine is cooled and then input into the reforming reactor.

[0025] In step one, the fuel tank controls the input amount of fuel in the cylinder engine through the fuel pump to control the heat provided by the exhaust gas to the reforming reactor; the reforming reactor stably delivers a protective gas with a constant heat to the stack box to control the uniform temperature rise of the stack box.

[0026] The beneficial effects of the present invention are as follows: the structural design of the present invention is reasonable and ingenious. Through the exhaust waste heat recovery method, the exhaust gas of the cylinder engine is used as the heat source of the cathode and anode gases of the stack box, thereby reducing the overall hybrid system. loss; the different grades of energy in each stage are utilized in a cascade manner to achieve efficient conversion of energy in each temperature range, further utilize the heat of the exhaust gas, and thus improve the cycle efficiency of the hybrid system.

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of a hybrid power system of a fuel cell and a cylinder engine provided by an embodiment of the present invention in a stable operation stage;

[0029] Figure 2 is a schematic diagram of a hybrid power system of a fuel cell and a cylinder engine provided by an embodiment of the present invention in a startup phase;

[0030] Figure 3 It is a schematic diagram of the internal structure of the battery stack box provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] Embodiment, this embodiment provides a hybrid power system of a fuel cell and a cylinder engine, including a predetermined startup phase and a stable operation phase. When the hybrid power system of the fuel cell and the cylinder engine is just started, it is in the predetermined startup phase, and when the temperature of the battery stack box in the system rises to the set temperature, the system switches to the stable operation phase.

[0032] See also Figure 1 , Figure 1The hybrid power system of the fuel cell and the cylinder engine is in a stable operation stage, and the connection relationship diagram of each component includes: a fuel tank 1, a stack box 2 and a cylinder engine 4 for driving the drive wheel 3 to rotate, which are connected in sequence; the stack box 2 is externally connected to a drive motor 14 for assisting in driving the drive wheel 3 to rotate; an air preheater 5 is connected to the cathode of the stack box 2, and the air preheater 5 is provided with a heating structure for heating the air inside it, and the exhaust gas output end of the cylinder engine 4 is connected to the heating structure of the air preheater 5 through a pipeline. The heating structure is an exhaust gas temporary storage chamber, or a heating pipe externally wound on the air preheater 5. The exhaust gas of the cylinder engine 4 is transported to the heating structure to provide heat for the air preheater 5 and then discharged, so as to realize the reuse of the exhaust gas heat. The fuel cell used in this scheme is SOFC.

[0033] It also includes a reforming reactor 6; the fuel tank 1 is connected to the input end of the reforming reactor 6, and the output end of the reforming reactor 6 is connected to the anode of the stack box 2; a heating chamber 61 is also provided on the reforming reactor 6, and the exhaust gas output end of the cylinder engine 4 is connected to the heating chamber 61 through a pipeline, and the output end of the heating chamber 61 is connected to the heating structure of the air preheater 5. The exhaust gas is first transported from the exhaust gas output end of the cylinder engine 4 to the heating chamber 61 of the reforming reactor 6 to provide heat for the reforming reaction in the reforming reactor 6; and then transported from the heating chamber 61 to the heating structure of the air preheater 5 to provide heat for the air in the air preheater 5 before being discharged. The energy of different grades in each stage is utilized in a stepwise manner to achieve efficient conversion of energy in each temperature section, further utilize the heat of the exhaust gas, and thus improve the system cycle efficiency. In addition, since the fuel (CH 4 If the fuel (or methanol) is directly used as SOFC fuel for power generation, it will face the problem of fuel cracking and carbon deposition, which will lead to SOFC performance degradation. Therefore, the fuel needs to be reformed and converted before being used as SOFC anode gas. In the reforming reactor 6, it is reformed into H2 (with a small amount of CO, CO 2 wait).

[0034] It also includes an air compressor 7, an air dryer 8, an air tank 9 and a filter 10 which are connected in sequence; the output end of the filter 10 is connected to the input end of the air preheater 5. The output port of the air compressor 7 is provided with a pressure regulating valve to adjust the air pressure in the air tank 9 to 0.5-0.8Mpa; in addition, the air dryer 8 is an adsorption regeneration structure, which absorbs moisture when wet air flows through and outputs dry air. When the pressure in the air tank 9 reaches the set value, the pressure regulating valve issues an instruction to open the discharge port of the air dryer 8, and the dry air in the air storage chamber of the air dryer 8 quickly flows in the opposite direction, passes through the desiccant layer, absorbs the moisture therein, and is discharged from the air dryer 8 to regenerate its desiccant. The air tank 9 is a gas pressure stabilizer.

[0035] The filter 10 is a cyclone filter structure, which rotates rapidly under the action of the guide vane. Under the action of centrifugal force, larger water droplets and solid impurities are rotated to the cylinder wall surface and gathered at the discharge port for discharge. The drainer at the bottom of the filter 10 is a float structure. When the liquid level reaches a certain height, the float lifts the liquid to discharge. The air compressor 7 compresses the air and then inputs it into the air dryer 8 for drying and then into the air storage tank 9. The air storage tank 9 filters the high-pressure air through the filter 10 and then inputs it into the air preheater 5 for heating, and then transports it to the cathode of the stack box 2.

[0036] It also includes a water tank 11 and a water pump 12 which are connected in sequence; the output end of the water pump 12 is connected to one end of the cylinder sleeve of the cylinder engine 4 through a pipeline, and the other end of the cylinder sleeve is connected to the input end of the reforming reactor 6 through a pipeline. Ionized water is stored in the water tank 11 and transported to the cylinder sleeve through the water pump 12 to prevent the cylinder engine 4 from overheating. In addition, the heat of the cylinder engine 4 evaporates the ionized water and is input into the reforming reactor 6 as a reactant, further improving the system circulation efficiency and saving energy.

[0037] When the fuel is methane, its reforming reaction is an endothermic reaction, and the process is as follows:

[0038] CH 4 (g)+H 2 O(g)=CO(g)+3H 2 (g);

[0039] CO(g)+H 2 O(g)=CO 2 (g)+H 2 (g);

[0040] When the fuel is methanol, its reforming reaction is an endothermic reaction, and the catalyst used is a metal element containing nickel, palladium, potassium, etc. The reaction process is as follows:

[0041] CH 3 OH(g)+H 2 O(g)=3H 2 (g)+CO 2 (g);

[0042] See also Figure 3 The inside of the battery stack box includes an anode gas duct plate 21, an anode 22, an electrolyte 23, a cathode 24, and a cathode gas duct plate 25; the anode gas duct plate 21, anode 22, electrolyte 23, cathode 24, and cathode gas duct plate 25 are arranged in sequence from top to bottom.

[0043] See also Figure 1 , Figure 3, after the reforming reaction, the reforming reactor 6 inputs the hydrogen-rich gas into the anode 22 of the stack box 2. The surface of the anode 22 of the stack box 2 adsorbs hydrogen and diffuses to the interface of the electrolyte 23 through the porous structure; at the same time, the air preheater 5 inputs high-pressure air to the cathode 24 of the stack box 2. The cathode porous structure of the stack box 2 adsorbs oxygen and ionizes oxygen into oxygen ions under the catalytic action. The oxygen ions pass through the electrolyte 23 and continue to diffuse to the interface between the electrolyte 23 and the anode 22 under the action of the concentration gradient, and react with the fuel gas. The reaction process here is as follows:

[0044] O 2- +H 2 =H 2 O+2 e- ;

[0045] The lost electrons return to the cathode 24 through the external circuit, and the reaction process is as follows:

[0046] 2H 2 +O 2 =2H 2 O

[0047] In addition, as in the above reaction process, after the high-pressure air enters the stack box 2, part of the O 2 , becomes oxygen-depleted air, and directly enters the cylinder engine 4, the cathode and anode gases come into contact, and can directly burn and expand without ignition, and drive the drive wheel 3 to operate through the gearbox. At the same time, the stack box 2 generates electricity through the reaction to drive the drive motor 14 to assist the drive wheel 3 to operate.

[0048] See also Figure 2 The input end of the reforming reactor 6 is also connected to a protective gas delivery pipeline. The protective gas delivery pipeline is provided with a ball valve, a solenoid valve, a flow meter and a check valve in sequence according to the protective gas delivery direction. The protective gas is 95:5 N 2 and H 2 mixed gas; during the startup phase of the hybrid power system, a protective gas is input. Firstly, the protective gas is heated by the reforming reactor 6 and then transported to the stack box 2 to heat the stack box 2; secondly, the protective gas is input into the stack box 2 to protect the stack box 2.

[0049] See also Figure 1 The fuel tank 1 is connected to a fuel pump 13, and the output end of the fuel pump 13 is connected to the reforming reactor 6 and the cylinder engine 4 through a first branch and a second branch respectively; the first branch and the second branch are respectively provided with a solenoid valve and a check valve according to the fuel delivery direction; the second branch is also provided with an atomizer and a backfire preventer.

[0050] The battery stack box 2 is externally connected to a supercapacitor, and the drive motor 14 is connected to the supercapacitor. With the supercapacitor, the power generated by the battery stack box 2 is buffered by the supercapacitor and then assisted by the drive motor 14 to operate the drive wheel 3. In addition, the cylinder engine 4 and the drive motor 14 are connected in parallel to drive the drive wheel 3.

[0051] See also Figure 1 , a method for recovering waste heat from exhaust gas implemented according to the hybrid power system of the fuel cell and the cylinder engine 4, comprising:

[0052] The exhaust gas generated when the cylinder engine 4 is running is transported from the exhaust gas output end of the cylinder engine 4 to the heating chamber 61 of the reforming reactor 6 to provide heat for the reforming reaction in the reforming reactor 6;

[0053] The exhaust gas is then transported from the heating chamber 61 to the heating structure of the air preheater 5, providing heat to the air in the air preheater 5 before being discharged. Through the exhaust gas waste heat recovery method, the exhaust gas of the cylinder engine 4 is used as the heat source of the cathode and anode gases of the stack box 2, reducing the overall hybrid system. loss; in addition, the tail gas is connected in series to heat the reforming reactor 6 and the air preheater 5, and the final exhaust temperature of the tail gas can be reduced to 300°C;

[0054] Moreover, the reaction of the stack box 2 itself is an exothermic reaction, and the temperature of the high-pressure air heated by the air preheater 5 is lower than the temperature inside the stack box 2. By passing air below the stack temperature into the stack box 2, the thermal balance inside the stack box 2 can be maintained, further improving the cycle efficiency of the hybrid power system.

[0055] See also Figure 2 , a method for starting a hybrid power system of a fuel cell and a cylinder engine 4, comprising the following steps:

[0056] Step 1: The protective gas is transported to the reforming reactor 6 through the protective gas delivery pipeline and then input into the fuel cell box 2;

[0057] The fuel tank 1 directly passes the fuel from the second branch to the cylinder engine 4 through the fuel pump 13, and the drive wheel 3 is driven to rotate through the cylinder engine 4; the exhaust gas generated by the operation of the cylinder engine 4 is transported from the exhaust gas output end of the cylinder engine 4 to the heating chamber 61 of the reforming reactor 6 to heat the protective gas in the reforming reactor 6; the heated protective gas is input into the stack box 2 to gradually heat up the stack box 2.

[0058] Step 2: When the temperature of the stack box 2 rises to the set temperature, the shielding gas delivery pipeline stops delivering the shielding gas; the fuel tank 1 inputs the fuel into the reforming reactor 6 from the first branch through the fuel pump 13, and the reforming reactor 6 inputs the hydrogen-rich gas into the anode 22 of the stack box 2. The gas storage tank 9 inputs the high-pressure air into the air preheater 5 for heating, and then delivers it to the cathode 24 of the stack box 2;

[0059] Step 3: The stack box 2 generates electricity, and the driving motor 14 assists in driving the driving wheel 3 to rotate, and the unreacted gas in the stack box 2 is input into the cylinder engine 4 to continue to burn and do work, further improving the system efficiency.

[0060] The exhaust gas generated by the operation of the cylinder engine 4 is transported from the heating chamber 61 of the reforming reactor 6 to the heating structure of the air preheater 5, and is discharged after heating the air preheater 5;

[0061] In step one, the water tank 11 transports deionized water to the cylinder liner of the cylinder engine 4 through the water pump 12, so that the cylinder engine 4 is cooled down and then discharged; during the heating process of the fuel cell box 2, no reforming reaction occurs in the reforming reactor 6, so deionized water is not needed, so the deionized water needs to be discharged after the cylinder engine 4 is cooled down.

[0062] In the step 2, the water storage tank 11 delivers deionized water to the cylinder liner of the cylinder engine 4 through the water pump 12, so that the cylinder engine 4 is cooled down and then input into the reforming reactor 6.

[0063] In step 1, the fuel tank 1 controls the input amount of fuel in the cylinder engine 4 through the fuel pump 13 to control the heat provided by the tail gas to the reforming reactor 6; the reforming reactor 6 stably delivers a protective gas with a constant heat to the stack box 2 to control the uniform temperature rise of the stack box 2. Avoid drastic temperature rise to cause a large thermal shock to the ceramics, cathode and anode materials in the stack box 2, and extend the service life of the product. The heating rate of the stack box 2 is controlled to be 1°C / min.

[0064] This hybrid power system is an interrelated system. The higher the gas conversion rate of the reaction in the stack box 2, the less unreacted gas is delivered to the cylinder engine 4, and the corresponding cylinder engine 4 has a lower efficiency, and the heat generated by combustion is reduced, which will affect the temperature of the anode and cathode input gases in the stack box 2 and have an inhibitory effect on the efficient operation of the stack. Therefore, the fuel cell system and the exhaust power system are in a mutually restrained balance relationship. There is a balance point between the fuel cell system and the exhaust power system, which makes the entire system cycle efficiency the highest.

[0065] See also Figures 1 to 3When in use, the protective gas is transported to the reforming reactor 6 through the protective gas delivery pipeline and then input into the stack box 2; the fuel tank 1 directly passes the fuel from the second branch into the cylinder engine 4 through the fuel pump 13, and the drive wheel 3 is driven to rotate through the cylinder engine 4; the exhaust gas generated by the operation of the cylinder engine 4 is transported from the exhaust gas output end of the cylinder engine 4 to the heating chamber 61 of the reforming reactor 6 to heat the protective gas in the reforming reactor 6, and then transported to the heating structure of the air preheater 5, and discharged after heating the air preheater 5; the heated protective gas is input into the stack box 2 to gradually heat up the stack box 2; at the same time, the water storage tank 11 transports deionized water to the cylinder liner of the cylinder engine 4 through the water pump 12, so that the cylinder engine 4 is cooled and then discharged;

[0066] When the temperature of the stack box 2 rises to the set temperature, the shielding gas delivery pipeline stops delivering the shielding gas; the fuel tank 1 inputs the fuel into the reforming reactor 6 from the first branch through the fuel pump 13, the reforming reactor 6 inputs hydrogen-rich gas to the anode 22 of the stack box 2, the gas storage tank 9 inputs the high-pressure air into the air preheater 5 for heating, and then delivers it to the cathode 24 of the stack box 2; at the same time, the water storage tank 11 delivers deionized water to the cylinder liner of the cylinder engine 4 through the water pump 12, so that the cylinder engine 4 is cooled and then input into the reforming reactor 6.

[0067] Finally, the stack box 2 reacts to generate electricity, and the drive motor 14 assists in driving the drive wheel 3 to rotate, and the unreacted gas in the stack box 2 is input into the cylinder engine 4 to continue to burn and do work.

[0068] When the car lacks power during driving, the fuel is directly introduced into the cylinder engine 4 for conventional engine use. At this time, the fuel cell system and the cylinder engine 4 work in parallel, and the gas entering the cylinder engine 4 includes both unreacted gas in the stack box 2 and directly input fuel gas.

[0069] The structural design of the present invention is reasonable and ingenious. Through the exhaust waste heat recovery method, the exhaust gas of the cylinder engine 4 is used as the heat source of the cathode and anode gases of the stack box 2, reducing the energy consumption of the entire hybrid system. loss; the different grades of energy in each stage are utilized in a cascade manner to achieve efficient conversion of energy in each temperature range, further utilize the heat of the exhaust gas, and thus improve the cycle efficiency of the hybrid system.

[0070] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the present invention by using the technical means and technical contents disclosed above, without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the content of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A hybrid power system of a fuel cell and a cylinder engine, characterized in that: include: A fuel tank, a battery stack box and a cylinder engine for driving the driving wheels to rotate, which are connected in sequence; The battery stack box is externally connected to a driving motor for assisting in driving the driving wheel to rotate; An air preheater is connected to the cathode of the stack box, and a heating structure for heating the air inside the air preheater is provided on the air preheater, and the exhaust gas output end of the cylinder engine is connected to the heating structure of the air preheater through a pipeline; The heating structure is a temporary storage chamber for exhaust gas, or a heating pipe externally wound on the air preheater; Also included is a reforming reactor; The fuel tank is connected to the input end of the reforming reactor, and the output end of the reforming reactor is connected to the anode of the stack box; A heating chamber is also provided on the reforming reactor, the exhaust gas output end of the cylinder engine is connected to the heating chamber through a pipeline, and the output end of the heating chamber is connected to the heating structure of the air preheater; It also includes a water storage tank and a water pump which are connected in sequence; The output end of the water pump is connected to one end of the cylinder liner of the cylinder engine through a pipeline, and the other end of the cylinder liner is connected to the input end of the reforming reactor through a pipeline; A supercapacitor is connected to the outside of the battery stack box, and the drive motor is connected to the supercapacitor.

2. The hybrid power system of a fuel cell and a cylinder engine according to claim 1, characterized in that: The input end of the reforming reactor is also connected to a protective gas delivery pipeline.

3. The hybrid power system of a fuel cell and a cylinder engine according to claim 1, characterized in that: The fuel tank is connected to a fuel pump, and the output end of the fuel pump is connected to the reforming reactor and the cylinder engine through a first branch and a second branch respectively; The first branch and the second branch are provided with a solenoid valve and a check valve in sequence according to the fuel delivery direction; The second branch line is also provided with an atomizer and a flashback arrester.

4. A method for recovering waste heat from exhaust gas implemented by a hybrid power system of a fuel cell and a cylinder engine according to any one of claims 1 to 3, characterized in that: include: The exhaust gas generated when the cylinder engine is running is transported from the exhaust gas output end of the cylinder engine to the heating chamber of the reforming reactor to provide heat for the reforming reaction in the reforming reactor; The exhaust gas is then transported from the heating chamber to the heating structure of the air preheater, provides heat to the air in the air preheater, and is then discharged.

5. A method for starting a hybrid power system of a fuel cell and a cylinder engine according to any one of claims 1 to 3, characterized in that: It includes the following steps: Step 1: The protective gas is transported to the reforming reactor through the protective gas delivery pipeline and then input into the fuel cell stack box; The fuel tank directly passes the fuel from the second branch into the cylinder engine through the fuel pump, and the drive wheel is driven to rotate through the cylinder engine; The tail gas generated by the operation of the cylinder engine is transported from the tail gas output end of the cylinder engine to the heating chamber of the reforming reactor to heat the protective gas in the reforming reactor; The heated protective gas is input into the stack box to gradually heat up the stack box; Step 2: When the temperature of the stack box rises to the set temperature, the shielding gas delivery pipeline stops delivering the shielding gas; The fuel tank inputs the fuel from the first branch into the reforming reactor through the fuel pump, the reforming reactor inputs the hydrogen-rich gas into the anode of the stack box, and the gas storage tank inputs the high-pressure air into the air preheater for heating, and then transports it to the cathode of the stack box; Step three: the stack box generates electricity, and the drive motor assists in driving the drive wheel to rotate. The unreacted gas in the stack box is input into the cylinder engine to continue burning and doing work.

6. The method for starting a hybrid power system of a fuel cell and a cylinder engine according to claim 5, characterized in that: The exhaust gas generated by the operation of the cylinder engine is transported from the heating chamber of the reforming reactor to the heating structure of the air preheater, and is discharged after heating the air preheater; In the step 1, the water tank delivers deionized water to the cylinder liner of the cylinder engine through a water pump, so that the cylinder engine is cooled and then discharged; In the step 2, the water storage tank delivers deionized water to the cylinder liner of the cylinder engine through a water pump, so that the cylinder engine is cooled and then input into the reforming reactor.

7. The method for starting a hybrid power system of a fuel cell and a cylinder engine according to claim 5, characterized in that: In the step 1, the fuel tank controls the input amount of fuel in the cylinder engine through the fuel pump to control the heat provided by the tail gas to the reforming reactor; The reforming reactor stably delivers a protective gas with a constant heat content to the stack box, controlling the stack box to heat up at a uniform rate.

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