JP2005122935A - Fuel cell system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cool a secondary cell without providing an exclusive cooling system. <P>SOLUTION: This fuel cell system is provided with a fuel cell stack 1 generating with hydrogen as fuel, a hydrogen tank 4 storing hydrogen compressed to a high pressure and supplied to the fuel battery stack 1, and the secondary cell 2 storing electric power for complementing the electric power obtained by the fuel battery stack 1. The secondary cell 2 is disposed to contact with an inner circumference wall of a barrel part of the hydrogen tank 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fuel cell system including a fuel cell that generates power by supplying hydrogen and a secondary battery for power storage.

  Fuel cell technology that enables clean exhaust and high energy efficiency is attracting attention as a countermeasure against environmental problems in recent years, particularly air pollution caused by automobile exhaust gas and global warming caused by carbon dioxide. A fuel cell is an energy conversion system that supplies hydrogen or hydrogen-rich reformed gas and air as fuel to an electrolyte / electrode catalyst complex, causes an electrochemical reaction, and converts chemical energy into electric energy. Among them, a solid polymer electrolyte fuel cell using a solid polymer membrane as an electrolyte is low in cost, easy to be compact, and has a high output density, so that it can be used as a power source for vehicles such as automobiles. Expected.

  However, in a power generation system including a fuel cell and a fuel cell, stable power generation cannot be performed in a state where warm-up has not been completed. Therefore, a secondary battery is provided as an auxiliary power source, and an electric heater is operated by the secondary battery, for example. Therefore, it has been studied to promote the warm-up of the power generation system including the fuel cell and the fuel cell.

  By the way, in a secondary battery used as an auxiliary power supply, the temperature rises due to a chemical reaction at an electrode that occurs during charging and discharging, or heat generation due to electrical resistance at a positive and negative terminal through which a charging / discharging current flows. If this temperature rise becomes too large, the battery life may be shortened. In particular, in the case of a lithium ion battery, an organic solvent is used for the electrolyte, and carbon or the like is used for the negative electrode active material.

  Therefore, as a countermeasure, various structures for cooling the battery by bringing a refrigerant into contact with the inside or the surface of the battery casing have been proposed (see, for example, Patent Document 1 to Patent Document 5).

On the other hand, in the case of natural gas vehicles (NGV), handling of containers that store natural gas, especially handling of containers, including damage to containers caused by rolling and handling (handling) of containers between parts delivery and mounting on vehicles, is particularly important. It was necessary to pay considerable attention to the method. For this reason, if a high-pressure compressed hydrogen container is required for handling, for example, if it is to be rolled and transported, a cushioning material may be placed inside the container at the mirror part (container shoulder) at the time of manufacture of the container, or it may be retrofitted to the outside. Some measures were taken to prevent impacts, such as by attaching a protective cap.
JP 2001-60466 A JP 2001-319697 A JP 2002-352863 A JP 2002-216860 A JP 2003-17131 A

  However, in the technique described in the above-mentioned patent document, since the refrigerant is brought into contact with the surface of the battery or the battery is cooled through the inside, the pump, the fan, the heat exchanger, the piping and the cooling are controlled. It was necessary to install a dedicated cooling system such as a control unit. For this reason, there has been a problem that the cost is increased due to an increase in the number of parts, and further, the space efficiency is deteriorated.

  Further, there is a possibility that damage during rolling and handling (handling) of the high-pressure compressed hydrogen container becomes a problem. As a countermeasure, when a buffer material or the like is placed in a part that requires strength in handling the high-pressure compressed hydrogen container, the part in which the buffer material is placed becomes thicker than necessary, leading to an increase in volume and weight of the container. It was.

  The present invention has been made in view of the above, and an object of the present invention is to provide a fuel cell system capable of cooling a secondary battery without providing a dedicated cooling system.

  In order to achieve the above object, means for solving the problems of the present invention are a fuel cell that generates power using hydrogen as a fuel, a hydrogen tank that compresses and stores hydrogen supplied to the fuel cell, and the fuel. A fuel cell system including a secondary battery in which electric power that complements electric power generated by the battery is stored is characterized in that the secondary battery is installed inside the hydrogen tank.

  According to the present invention, since the secondary battery is installed inside the hydrogen tank, when hydrogen compressed at a high pressure from the hydrogen tank is supplied to the fuel cell, the hydrogen is adiabatically expanded by hydrogen in the hydrogen tank. The temperature in the tank decreases, and the secondary battery can be cooled by this temperature decrease.

  Thereby, a cooling means for cooling the secondary battery is not required, and the configuration can be downsized.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best embodiment for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing a configuration of a fuel cell system according to Embodiment 1 of the present invention. The fuel cell system of Example 1 shown in FIG. 1 and the fuel cell system of Example 2 described below are mounted on a vehicle and used to supply power to a drive motor that is a vehicle drive source. Fuel cell stack 1, hydrogen supply system for supplying hydrogen as fuel to fuel cell stack 1, air supply system for supplying air as oxidant, secondary battery 2 as auxiliary power supply, fuel cell stacks 1 and 2 A controller 3 is provided for controlling power extraction from the secondary battery 2.

  In Examples 1 and 2 to be described below, the hydrogen tank 4 for high-pressure compression that fills and stores hydrogen supplied to the fuel cell stack 1 is assumed to be one for easy explanation, However, the number of the hydrogen tanks 4 and the manufacturing method are not limited to this.

  The fuel cell stack 1 has a structure in which power generation cells in which a fuel electrode to which hydrogen is supplied and an air electrode to which oxygen (air) is supplied are stacked with an electrolyte / electrode catalyst composite interposed therebetween are stacked in multiple stages, It converts chemical energy into electrical energy by an electrochemical reaction. At the fuel electrode of each power generation cell, hydrogen ions and electrons are dissociated when hydrogen is supplied, hydrogen ions pass through the electrolyte, electrons generate power through an external circuit, and move to the air electrode side. To do. In the air electrode, oxygen in the supplied air reacts with the hydrogen ions and electrons to generate water, which is discharged to the outside.

  For example, a solid polymer electrolyte is used as the electrolyte of the fuel cell stack 1 in consideration of high energy density, low cost, light weight, and the like. The solid polymer electrolyte is made of an ion (proton) conductive polymer film such as a fluororesin ion exchange membrane, and functions as an ion conductive electrolyte when saturated with water.

  The hydrogen supply system includes, for example, a hydrogen tank 4 that is a hydrogen supply device, a discharge valve 5, a hydrogen pressure control valve 6 that is a pressure adjusting device, a hydrogen supply pipe 7, and a hydrogen exhaust pipe 8. Then, the hydrogen supplied from the hydrogen tank 4 is depressurized by the hydrogen pressure regulating valve 6 and sent to the fuel electrode of the fuel cell stack 1 through the hydrogen supply pipe 7. Further, the exhausted hydrogen from the fuel cell stack 1 is discharged through the hydrogen exhaust pipe 8, and this exhausted hydrogen is circulated by, for example, an ejector and mixed with the hydrogen supplied from the hydrogen tank 4 anew. It may be supplied again to the fuel electrode of the fuel cell stack 1.

  The air supply means has a compressor 9 for sucking outside air and pumping the air to the air electrode of the fuel cell stack 1, an air supply pipe 10, and an air exhaust pipe 11 for discharging the air electrode exhaust gas. Yes. The compressor 9 is driven to take in outside air in a pressurized state, and is sent to the air electrode of the fuel cell stack 1 through the air supply pipe 10. Further, oxygen and other components in the air that have not been consumed in the fuel cell stack 1 are discharged into the atmosphere from the air exhaust pipe 11.

  In the above-described hydrogen supply system and air supply system, the heat exchanger 12 is installed in the hydrogen supply pipe 7 and the air supply pipe 10 immediately before the entrance of the fuel cell stack 1, and hydrogen or air is used as the heat exchanger 12. The fuel cell stack 1 is supplied with the temperature adjusted to the optimum temperature. A circulation path 13 through which a temperature adjusting refrigerant is circulated is connected to the heat exchanger 12, and the circulation path 13 is provided with a circulation pump 14 for circulating the refrigerant and a radiator 15 for cooling the refrigerant. ing. The temperatures of the hydrogen and air supplied to the fuel cell stack 1 are detected by the temperature sensors 16 and 17 immediately before the entrance of the fuel cell stack 1, and the controller 3 determines the circulation pump 14 and the radiator 15 according to the detected value. By controlling the operation of the fan, the temperature of hydrogen and air is adjusted to the optimum temperature.

  The secondary battery 2 is composed of a plate-like and flexible laminated battery in which battery elements are packaged with a laminate film such as aluminum, for example, and is arranged in contact with the inner peripheral wall of the body of the hydrogen tank 4 as will be described later. Has been. The secondary battery 2 is in contact with the inner peripheral wall of the hydrogen tank 4 to exchange heat with the hydrogen tank 4.

  As shown in FIG. 1, the vehicle on which the fuel cell system is mounted includes a drive motor inverter 18 and a drive motor 19, and a part of the electric power generated by the fuel cell stack 1 is an auxiliary machine 21. The consumed power is supplied from the drive motor inverter 18 to the drive motor 19, and the drive motor 19 drives the drive wheels 22 of the fuel cell vehicle.

  Of the power generated by the fuel cell stack 1, surplus power that has not been consumed by the auxiliary machine (load) 21 or the drive motor 19 is stored in the secondary battery 2. Further, when regenerative power is generated due to deceleration of the vehicle, a part of this regenerative power is consumed by the auxiliary machine 21, and surplus power is recovered from the drive motor inverter 18 to the secondary battery 2 and stored.

  On the other hand, when the generated power of the fuel cell stack 1 is insufficient, the power stored in the secondary battery 2 serves as an assist power source for assisting the shortage of the power generation amount of the fuel cell stack 1, or the auxiliary machine 21 or the drive motor inverter 18. To be supplied. At this time, the output voltage and current value from the secondary battery 2 are measured by the voltage / ammeter 20, and the controller 3 determines the SOC (remaining charge amount) of the secondary battery 2 based on the measured value. ) And monitor this. Then, according to the remaining charge amount of the secondary battery 2, the power generation state of the fuel cell stack 1, the power required for the drive motor 19 and the auxiliary machine 21, the controller 3 performs the fuel cell stack 1 and the secondary battery 2. The extraction of electric power from the battery 2 is controlled.

  In such a fuel cell vehicle, for example, at the time of acceleration, the generated power of the fuel cell stack 1 becomes insufficiently supplied, and the secondary battery 2 assists and discharges the insufficient power. As shown in FIG. 2 showing the state of the system when the fuel cell vehicle is accelerated, the secondary battery 2 generates heat due to a chemical reaction at the electrode generated at this time and an electrical resistance at the positive and negative terminals where a discharge current flows. Then, the temperature of the secondary battery 2 rises. If this temperature rise becomes too large, the battery life may be shortened or the battery may be damaged, so it is necessary to cool it.

  Therefore, in the first embodiment, as shown in FIG. 3, the secondary battery 2 composed of the above-described laminated laminate battery is placed in contact with the inner peripheral wall of the body portion of the hydrogen tank 4, so that 2 Problems related to heat generation of the secondary battery 2 are solved.

  FIG. 3 is a sectional view showing the structure of the hydrogen tank 4 according to the first embodiment of the present invention.

  In FIG. 3, in the hydrogen tank 4, a secondary battery 2 constituted by a laminated laminate battery is provided with hydrogen in an outer peripheral reinforcing material 32 provided inside a core material (liner portion) 31 of the hydrogen tank 4. It is installed in contact with the inner peripheral wall along the inner peripheral wall of the outer peripheral reinforcing member 32 provided in the body portion of the tank 4. Both electrodes 33 of the secondary battery 2 are electrically connected to electrodes 36 of an end plug portion 35 including container main plugs and the like installed at openings at both ends of the hydrogen tank 4 via a harness 34. The secondary battery 2 is electrically connected to the outside through 35.

  With such a structure, the secondary battery 2 is in direct contact with hydrogen whose temperature has decreased due to adiabatic expansion of hydrogen inside the hydrogen tank 4 that occurs when hydrogen is supplied from the inside of the hydrogen tank 4 to the fuel cell stack 1. can do. Further, the secondary battery 2 can come into contact with the core material 31 of the hydrogen tank 4 that has absorbed heat by directly contacting with hydrogen from other areas. As a result, a special cooling device is not required, a fuel cell system is established, and the secondary battery 2 can be efficiently cooled.

  Next, with reference to FIGS. 4 to 9, a method for installing the secondary battery 2 composed of a laminated laminate battery inside the hydrogen tank 4 will be described.

  The hydrogen tank 4 is manufactured from a material having the same wall thickness by a drawing method (or other drawing method may be used), and a hydrogen tank 4 around which an outer peripheral reinforcing material 32 such as glass fiber or carbon fiber is wound is used.

  As shown in FIG. 4, an electrode 33 is formed at the end of the laminated laminate battery constituting the secondary battery 2 installed inside the hydrogen tank 4 and is bonded to the inner peripheral wall of the hydrogen tank 4. An adhesive 41 having a good thermal conductivity is applied to the adhesive surface to be applied, and is wound around a seal mount 42. The seal mount 42 is for making the adhesive 41 be wound in a state where the adhesive 41 is not bonded to other than the adhesive surface of the hydrogen tank 4, and the surface contacting the adhesive 41 is not attached with the adhesive 41 such as oil paper. A surface that is made of a material and is in contact with a surface to which the adhesive 41 is not applied is coated with glue for attaching the seal mount 42 to the surface.

  As shown in FIG. 5, the laminate battery in which the adhesive 41 is applied on one side and wound is provided with a dedicated rotary arm 51 with a joint, and the rotary arm 51 is used to form a hydrogen tank. 4 is inserted into the hydrogen tank 4 from the openings at both ends. Subsequently, as shown in FIG. 6, the laminate battery is brought into contact with the inner peripheral wall of the body portion of the hydrogen tank 4 by operating the rotating arm 51.

  Next, as shown in FIG. 7, the laminate battery is stretched along the inner peripheral wall while adhering the adhesive 41 of the laminated battery wound by rotating the rotary arm 51 to the inner peripheral wall of the hydrogen tank 4, The laminate battery is bonded to the inner peripheral wall of the hydrogen tank 4. At this time, the laminate battery is sandwiched and pressed while rotating the roller 71 on the inner side of the hydrogen tank 4 attached to the rotating arm 51 and the roller 72 on the outer side of the hydrogen tank 4 to increase the adhesive strength of the laminate battery.

  When the adhesion of the laminate battery is completed, as shown in FIG. 8, the seal mount 42 sandwiched between the laminate batteries is peeled off from the laminate battery so that the adhesive 41 does not adhere to the other side than the adhesion surface, and the peeled seal mount 42 is removed from the laminate battery. Take it out of the tank 4. Subsequently, the harness 34 having the connector 81 attached to one end thereof is connected to the electrode 33 of the laminated battery, and the connector 81 of the harness 34 is connected to the end plug portion 35 formed of an insulating material. As a result, as shown in FIG. 9, the harness 34 is connected to the harness 92 connected to the end plug portion 35 through the conductive material 91 embedded in the end plug portion 35, and the harness 34 is connected to the end plug portion 35. To the outside of the hydrogen tank 4 to complete the electrical connection of the laminated battery. Thereafter, the end plug portions 35 are attached to the openings at both ends of the hydrogen tank 4 to complete the hydrogen tank 4.

  FIG. 10 is a diagram showing a state of operation when the fuel cell system of Example 1 is started at a low temperature or during a warm-up operation.

  In FIG. 10, when starting the fuel cell system at a low temperature or during a warm-up operation, first, the auxiliary machine 21 is operated to start the fuel cell stack 1. The controller 3 gives priority to taking out the electric power from the secondary battery 2 on condition that the remaining charge SOC of the secondary battery 2 is equal to or greater than a predetermined set value determined in consideration of deterioration or the like. The secondary battery 2 is positively heated. Thereby, the temperature of the secondary battery 2 rises, and the temperature raised by the heat generation of the secondary battery 2 is directly transferred to hydrogen. The secondary battery is also in contact with the core material 31 of the hydrogen tank 4 in a wide range, and transfers heat to hydrogen through the core material 31. As a result, the hydrogen temperature in the hydrogen tank 4 rises, and it becomes possible to increase the supply temperature of hydrogen supplied to the fuel cell stack 1 without providing a special heating device. The operation time can be shortened.

  As described above, in the first embodiment, when hydrogen is supplied from the hydrogen tank 4 filled with high-pressure compressed hydrogen to the fuel cell stack 1, the hydrogen remaining in the hydrogen tank 4 is adiabatically expanded, and the hydrogen tank By utilizing the fact that the temperature inside 4 decreases, the secondary battery 2 is installed on the inner peripheral wall of the hydrogen tank 4 and brought into contact with hydrogen over a wide range, so that the secondary battery 2 can be made efficient by its heat transfer effect. Can be cooled to. This eliminates the need for components such as pumps, fans, heat exchangers, piping, etc. for cooling the battery against the surface of the battery or cooling the battery, as in the past, with fewer parts, cooling efficiency, A fuel cell system with good cost and space efficiency can be provided.

  In addition, the heat generated from the secondary battery 2 makes it possible to warm the hydrogen fuel supplied to the fuel cell system during low-temperature start-up or warm-up operation, improving the warm-up performance of the fuel cell system and enabling starting at a lower temperature. It becomes. Further, it is possible to omit a warming device inside the system.

  Further, when the fuel cell system is used over a long period of time, the secondary battery 2 is mounted on the vehicle when mounted on a fuel cell vehicle (FCV) or the like that is required to prevent the deterioration of the secondary battery performance. In particular, the fuel cell can be optimized and used for starting a fuel cell and storing regenerative energy.

  FIG. 11 is a diagram showing a configuration of a fuel cell system according to Embodiment 2 of the present invention. A feature of the fuel cell system of the second embodiment shown in FIG. 11 is that, compared with the first embodiment described above, the mirror 31 (container shoulder) of the hydrogen tank 4 and the core material 31 of the hydrogen tank 4 The secondary battery 2 composed of the same laminated laminate battery as that of the first embodiment is interposed between the outer peripheral reinforcing member 32 and the rest is the same as the first embodiment. In FIGS. 11 to 21 described below, the same reference numerals as those in FIGS. 1 to 10 described above have the same functions, and the description thereof is omitted.

  In the fuel cell vehicle shown in FIG. 11, for example, at the time of acceleration, the generated power of the fuel cell stack 1 becomes insufficiently supplied, and the secondary battery 2 assists and discharges the insufficient power. As shown in FIG. 12 showing the state of the system when the fuel cell vehicle is accelerated, the secondary battery 2 is caused by the chemical reaction at the electrode generated at this time and the electrical resistance at the positive and negative terminals for passing a discharge current. Heat is generated and the temperature of the secondary battery 2 rises. If this temperature rise becomes too large, the battery life may be shortened or the battery may be damaged, so it is necessary to cool it.

  Therefore, in the second embodiment, as shown in FIG. 13, the secondary battery 2 is placed in contact with the mirror portion inside the hydrogen tank 4 to solve the problem related to the heat generation of the secondary battery 2. Yes.

  FIG. 13 is a cross-sectional view showing the internal structure of the hydrogen tank 4 according to the second embodiment of the present invention.

  In FIG. 13, the hydrogen tank 4 includes an outer peripheral reinforcing material that reinforces the outer periphery of the hydrogen tank 4 and the core material (liner portion) 31 of the hydrogen tank at the mirror parts (container shoulders) 131 on both ends of the hydrogen tank 4. 32, the secondary battery 2 composed of a laminated laminate battery similar to that of the first embodiment is sandwiched.

  That is, each secondary battery 2 contacts the core material 31 of the hydrogen tank 4 in a wide range, and is most structurally the core material 31 of the hydrogen tank 4 manufactured by drawing or drawing from the same thickness material. When the change is large and rolling conveyance (handling) is assumed, the hydrogen tank 4 is provided at a portion that requires strength in handling. When the hydrogen tank 4 is rolled and transported (handled), for example, as shown in FIG. 14, the mirror part 131 of the hydrogen tank 4 is grounded, and the hydrogen tank 4 is rotated and moved using the grounded mirror part 131 as a fulcrum. Therefore, the mirror 131 serving as a fulcrum is liable to be damaged or broken.

  Therefore, by protecting the mirror part 131 of the hydrogen tank 4 with the secondary battery 2 formed of an elastic laminated battery, a fuel cell system is established without requiring a special cooling device or a protective material. At the same time, the secondary battery 2 can be efficiently cooled.

  Next, with reference to FIGS. 15 to 20, a method for installing the secondary battery 2 composed of a laminated laminate battery on the mirror 131 inside the hydrogen tank 4 will be described.

  First, as shown in FIG. 15, the core material (liner part) 31 of the hydrogen tank 4 is made from a material having the same thickness by drawing or drawing. Next, as shown in FIG. 16, the core material 31 of the hydrogen tank 4 created in this way is attached to a winding machine 161 that performs a winding operation for winding the outer peripheral reinforcing material 32 around the hydrogen tank 4. The laminated batteries serving as the secondary battery 2 are temporarily fixed to both mirror parts 131, and the protective member 162 is attached to the electrode 33 of each laminated battery to protect the electrode 33.

  Next, as shown in FIG. 17, while the winding machine 161 is rotated, the outer peripheral reinforcing material 32 such as carbon fiber is uniformly wound around the entire outer peripheral portion of the core material 31 of the hydrogen tank 4. In this winding operation, the winding operation is performed so that the protected electrode 33 of the laminated battery is exposed without being wound by the outer peripheral reinforcing material 32, and the laminated battery can be electrically connected later. In this way, when the entire hydrogen tank 4 is wound with the outer peripheral reinforcing material 32 such as carbon fiber having sufficient strength, the winding operation is completed. As a result, as shown in FIG. 18, the laminated battery is sandwiched between the core material 31 and the outer peripheral reinforcing material 32 and embedded in the hydrogen tank 4, and directly contacts the core material 31 of the hydrogen tank 4 over a wide range. It becomes the structure to do.

  Thereafter, the hydrogen tank 4 is removed from the winding machine 161, the protective member 162 attached to the electrode 33 of the laminate battery is removed, and the electrode 33 is exposed. Subsequently, end plug portions 35 are attached to the opening portions at both ends of the hydrogen tank 4 to complete the hydrogen tank 4.

  Next, as shown in FIG. 20, the end plug portion 35 is attached and fixed to a fixing bracket 201 that is fixedly installed in the fuel cell vehicle and fixes the hydrogen tank 4 to the vehicle, and penetrates through the inside of the fixing bracket 201. Then, the harness 202 connected to the power distribution system of the vehicle is connected to the electrode 33 of the secondary battery 2 embedded in the hydrogen tank 4, and the electrical connection of the secondary battery 2 is completed.

  FIG. 21 is a diagram showing a state of operation during low temperature startup or warm-up operation of the fuel cell system of the second embodiment.

  In FIG. 21, at the time of low temperature startup or warm-up operation of the fuel cell system, first, the auxiliary machine 21 is operated to start up the fuel cell stack 1. The controller 3 gives priority to taking out the electric power from the secondary battery 2 on condition that the remaining charge SOC of the secondary battery 2 is equal to or greater than a predetermined set value determined in consideration of deterioration or the like. The secondary battery 2 is positively heated. Thereby, the temperature of the secondary battery 2 rises, and the temperature raised by the heat generation of the secondary battery 2 is directly transferred to hydrogen. The secondary battery is also in contact with the core material 31 of the hydrogen tank 4 in a wide range, and transfers heat to hydrogen through the core material 31. As a result, the hydrogen temperature in the hydrogen tank 4 rises, and it becomes possible to increase the supply temperature of hydrogen supplied to the fuel cell stack 1 without providing a special heating device. The operation time can be shortened.

  Thus, also in the said Example 2, the effect similar to the effect acquired in Example 1 demonstrated previously can be achieved.

  Furthermore, in the second embodiment, the secondary battery 2 is sandwiched between the core material 31 and the outer peripheral reinforcing material 32 of the hydrogen tank 4 in a portion that requires strength in handling the hydrogen tank 4, for example, the mirror portion of the hydrogen tank 4. Since the structure is adopted, a portion that is most structurally weak in the core material 31 of the hydrogen tank 4 made of the same thickness member can be protected by the secondary battery 2 having elasticity. As a result, especially when handling the hydrogen tank 4, especially when the hydrogen tank 4 is rolled and handled (handling) between the delivery of the hydrogen tank 4 and the mounting on the vehicle, it moves while rotating with the mirror part of the hydrogen tank 4 as a fulcrum. This makes it possible to prevent damage during the operation.

It is a figure which shows the structure of the fuel cell system which concerns on Example 1 of this invention. It is a figure which shows the mode at the time of discharge of a secondary battery in the system shown in Example 1. FIG. 1 is a diagram illustrating an internal structure of a hydrogen tank according to Example 1. FIG. FIG. 3 is a diagram illustrating a method of installing a secondary battery composed of a laminated laminate battery inside the hydrogen tank of Example 1. FIG. 3 is a diagram illustrating a method of installing a secondary battery composed of a laminated laminate battery inside the hydrogen tank of Example 1. FIG. 3 is a diagram illustrating a method of installing a secondary battery composed of a laminated laminate battery inside the hydrogen tank of Example 1. FIG. 3 is a diagram illustrating a method of installing a secondary battery composed of a laminated laminate battery inside the hydrogen tank of Example 1. FIG. 3 is a diagram illustrating a method of installing a secondary battery composed of a laminated laminate battery inside the hydrogen tank of Example 1. FIG. 3 is a diagram illustrating a method of installing a secondary battery composed of a laminated laminate battery inside the hydrogen tank of Example 1. It is a figure in the system of Example 1 which shows the mode at the time of low temperature starting or warm-up operation. It is a figure which shows the structure of the fuel cell system which concerns on Example 2 of this invention. It is a figure which shows the mode at the time of discharge of a secondary battery in the system shown in Example 2. FIG. 6 is a diagram illustrating an internal structure of a hydrogen tank according to Example 2. FIG. It is a figure which shows the mode of handling of the hydrogen tank of Example 2. FIG. 6 is a diagram illustrating a method of installing a secondary battery composed of a laminated laminate battery in the hydrogen tank of Example 2. FIG. 6 is a diagram illustrating a method of installing a secondary battery composed of a laminated laminate battery in the hydrogen tank of Example 2. FIG. 6 is a diagram illustrating a method of installing a secondary battery composed of a laminated laminate battery in the hydrogen tank of Example 2. FIG. 6 is a diagram illustrating a method of installing a secondary battery composed of a laminated laminate battery in the hydrogen tank of Example 2. FIG. 6 is a diagram illustrating a method of installing a secondary battery composed of a laminated laminate battery in the hydrogen tank of Example 2. FIG. 6 is a diagram illustrating a method of installing a secondary battery composed of a laminated laminate battery in the hydrogen tank of Example 2. FIG. It is a figure in the system of Example 2 which shows the mode at the time of low temperature starting or warming up operation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Fuel cell stack 2 ... Secondary battery 3 ... Controller 4 ... Hydrogen tank 5 ... Drain valve 6 ... Hydrogen pressure regulating valve 7 ... Hydrogen supply piping 8 ... Hydrogen exhaust piping 9 ... Compressor 10 ... Air supply piping 11 ... Air exhaust piping 12 DESCRIPTION OF SYMBOLS ... Heat exchanger 13 ... Circulation path 14 ... Circulation pump 15 ... Radiator 16, 17 ... Temperature sensor 18 ... Drive motor inverter 19 ... Drive motor 20 ... Voltage ammeter 21 ... Auxiliary equipment 22 ... Drive wheel 31 ... Core material 32 ... Outer periphery Reinforcing material 33, 36 ... Electrode 34, 92, 202 ... Harness 35 ... End plug part 41 ... Adhesive 42 ... Seal mount 51 ... Rotating arm 71, 72 ... Roller 81 ... Connector 91 ... Conductive material 131 ... Mirror part 161 ... Winding Machine 162 ... Protective member 201 ... Fixing bracket

Claims (6)

A fuel cell that generates electricity using hydrogen as a fuel;
A hydrogen tank for compressing and storing hydrogen supplied to the fuel cell;
A fuel cell system having a secondary battery in which electric power supplementing electric power generated by the fuel cell is stored;
The fuel cell system, wherein the secondary battery is installed in the hydrogen tank. The hydrogen tank is formed by winding a peripheral reinforcing material from above the core material (liner part),
2. The fuel cell system according to claim 1, wherein the secondary battery is constituted by a laminated laminate battery, and is sandwiched and installed between a core material and an outer peripheral reinforcing material of the hydrogen tank. The hydrogen tank is formed by winding a peripheral reinforcing material from above the core material (liner part),
The secondary battery is composed of a laminated laminate battery, and is sandwiched between a core material of the hydrogen tank and an outer peripheral reinforcing material at a part requiring strength in handling the hydrogen tank as a protective material for protecting the part. The fuel cell system according to claim 1, wherein the fuel cell system is installed. The said secondary battery is cooled by the temperature fall accompanying the adiabatic expansion inside the said hydrogen tank, when the hydrogen stored in the said hydrogen tank is supplied to the said fuel cell. The fuel cell system described. The hydrogen in the hydrogen tank is warmed by heat generation of the secondary battery by prioritizing power extraction from the secondary battery during low temperature startup or warm-up operation of the fuel cell system. Item 5. The fuel cell system according to any one of Items 1, 2, 3, and 4. The said fuel cell system is mounted in a vehicle, and is used for the electric power supply to the drive motor which is a vehicle drive source, The any one of Claim 1, 2, 3, 4 and 5 characterized by the above-mentioned. Fuel cell system.

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