KR20200064492A - Low pressure metal hybrid type hydrogen storage and emitting system for fuel cell - Google Patents

Abstract

The present invention relates to a low-pressure metal hybrid type hydrogen charge and discharge system for fuel cells, capable of increasing not only hydrogen absorption and storage efficiency of a hydrogen storage alloy but also hydrogen emission efficiency thereof and increasing energy efficiency through recovery of waste heat from a fuel cell stack. According to an embodiment of the present invention, the low-pressure metal hybrid type hydrogen charge and discharge system for fuel cells comprises: a hydrogen charge and discharge portion connected to each of a fuel cell stack and a hydrogen supply unit, and accommodating a hydrogen storage alloy capable of hydrogen absorption and storage therein; a first heat exchanger provided in the hydrogen charge and discharge portion and heating the hydrogen storage alloy by flow of a heating medium; a heating medium generation portion installed on the fuel cell stack and generating a heating medium through heat exchange with the fuel cell stack; a heating medium circulation unit for circulating the heating medium generated by the heating medium generation unit to the first heat exchanger; a second heat exchanger arranged around the hydrogen charge and discharge portion and cooling the hydrogen storage alloy by flow of a refrigerant; a refrigerant circulation unit connected to the second heat exchanger and circulating the refrigerant to the second heat exchanger; and a control portion for controlling operation of the heating medium circulation unit and the refrigerant circulation unit.

Description

LOW PRESSURE METAL HYBRID TYPE HYDROGEN STORAGE AND EMITTING SYSTEM FOR FUEL CELL

Disclosed is a hydrogen charging and discharging system for a fuel cell that supplies hydrogen to a fuel cell stack by storing and releasing hydrogen.

Unless otherwise indicated in this specification, the contents described in this identification item are not prior art to the claims of this application, and the description in this identification item is not admitted to be prior art.

In general, a fuel cell system directly converts chemical energy generated by oxidation of supplied fuel into electrical energy for power supply.

Such a fuel cell system generates electric energy by electrochemically reacting by supplying hydrogen contained in fuels such as diesel oil and gasoline to the cathode of the fuel cell stack, and supplying oxidant oxygen to the anode of the fuel cell to react electrochemically. Here, the anode and the cathode of the fuel cell stack are separated from each other by an electrolyte member.

The power generation principle of the fuel cell system is as follows.

First, hydrogen supplied to the negative electrode of the fuel cell stack as the negative electrode active material is dissociated into hydrogen ions (H ⁺ ) and electrons (-). In order to promote this dissociation reaction, platinum is used as a catalyst, for example. Hydrogen ions (H ⁺ ) dissociated from hydrogen pass through the electrolyte of the fuel cell stack and react with oxygen supplied to the positive electrode as a positive electrode active material to produce water (H ₂ 0) in the form of water vapor. On the other hand, as the electrons (-) generated by the dissociation of hydrogen move from the cathode of the fuel cell stack to the anode, electromotive force is generated between the anode and the cathode to generate electricity.

As described above, a power generation method of a fuel cell system that directly converts chemical energy into electrical energy has a higher energy efficiency than a thermal power generation method, and thus can be effectively utilized as a power source of a motor driving an electric vehicle, for example. There are advantages. In addition, most of the gas exhausted from the fuel cell system is water vapor (H ₂ 0), which has the advantage of not emitting harmful gases such as carbon monoxide, like a normal internal combustion engine using fossil fuel.

On the other hand, for the operation of the fuel cell system, in addition to a fuel cell stack in which an oxidation reaction of fuel occurs, a hydrogen storage device for supplying hydrogen to the anode of the fuel cell stack and an air supply device for supplying oxygen to the anode of the fuel cell stack, etc. need.

Hydrogen storage devices that supply hydrogen to the fuel cell stack include, for example, a form in which high-pressure charged hydrogen is compressed in a hydrogen storage tank, and a form in which hydrogen obtained by reforming a gas containing hydrogen vaporized by fuel is compressed, or hydrogen. And forms using a storage alloy.

Among these, in the case of a hydrogen storage device for a fuel cell using a hydrogen storage alloy, due to the use of a hydrogen storage alloy that stores metal in the form of metal hydride by absorbing hydrogen gas during the reaction of metal and hydrogen, As a result, hydrogen can be stored at a density of 1000 times that of gaseous hydrogen. Known hydrogen storage alloys include titanium-iron alloys, lanthanum-nickel alloys, and magnesium-nickel alloys.

Therefore, a hydrogen storage device for a fuel cell using a hydrogen storage alloy can stably store hydrogen in a state in which metal and hydrogen are combined without the use of a high pressure hydrogen storage tank. Because there is no explosion of the container due to the car, there is an advantage of very high safety, as well as the need to consume energy for hydrogen compression and the hydrogen storage is very large.

On the other hand, the hydrogen storage alloy has a disadvantage in that it has a heavy weight, and it is difficult to control heat due to the characteristic that an endothermic reaction occurs when releasing hydrogen and an exothermic reaction when occluding hydrogen, and the pressure changes when storing and releasing hydrogen. When the temperature is changed, it is difficult to commercialize due to the characteristics of the temperature.

In order to control the heat of the hydrogen storage alloy, a method of installing a cooling flow path inside the hydrogen storage alloy or adjusting the internal pressure of the storage container of the hydrogen storage alloy is used.

As an example of a fuel cell system using such a hydrogen storage alloy, in Korean Patent Publication No. 10-2010-0112296 (published on October 19, 2010), a fuel cell and fuel for converting the chemical energy of hydrogen into electric power through an electrochemical reaction, A fuel supply device for storing and supplying fuel necessary for a battery to generate electricity, a power control device for converting and controlling DC electricity generated by a fuel cell into power required by a load, and a portion of the power generated by the fuel cell A fuel cell system comprising a storage battery for supplying electric power required for the operation of the fuel cell system and responding to a rapid change in load, and a system controller for controlling the fuel cell system as a whole, comprising a supercapacitor instead of the storage battery Install, install two or more hydrogen storage alloy containers in parallel with the fuel supply device, install a hydrogen supply regulator additionally, and at the same time, connect the hydrogen supply regulator to the hydrogen storage alloy container and the system controller, Under the control of the system controller, only the hydrogen release valve of one of the two or more hydrogen storage alloy containers is opened, and the hydrogen release valve of the other hydrogen storage alloy container is controlled in a closed state and is being discharged. When the hydrogen level of the hydrogen storage alloy container reaches a certain level, the hydrogen release valve of the next order hydrogen storage alloy container is opened, and at the same time, the hydrogen discharge valve of the hydrogen storage alloy container that has released hydrogen so far is controlled to be closed. Disclosed is a fuel cell system having a hydrogen storage alloy container configured to enable continuous operation.

In the case of the fuel cell system having the conventional hydrogen storage alloy container as described above, the heat storage generated during the hydrogen storage reaction of the hydrogen storage alloy decreases the storage efficiency of hydrogen, and at the same time, a separate heat source must be used to release hydrogen. Therefore, there is a problem that energy efficiency is lowered.

In addition, in the case of a conventional hydrogen storage device for a fuel cell, there is a problem in that overall energy efficiency is deteriorated as high temperature heat generated from the fuel cell stack is discharged as it is.

1. Republic of Korea Patent Publication No. 10-2010-0112296 (released on October 19, 2010)

It is intended to provide a low pressure metal hybrid hydrogen charging and discharging system for a fuel cell that can increase not only the hydrogen storage efficiency of the hydrogen storage alloy, but also the hydrogen emission efficiency, and increase energy efficiency through waste heat recovery of the fuel cell stack.

In addition, it is obviously not limited to the above-described technical problems, and another technical problem may be derived from the following description.

Disclosed is a hydrogen charging and discharging unit which is connected to a fuel cell stack and a hydrogen supply unit and accommodates a hydrogen storage alloy capable of storing hydrogen therein, and the hydrogen storage alloy provided in the hydrogen charging and discharging unit by perfusion of a heating medium. A first heat exchanger for heating, a heat medium generating unit installed on the side of the fuel cell stack to generate heat medium through heat exchange with the fuel cell stack, and a heat medium generated by the heat medium generating unit to circulate through the first heat exchanger A heat medium circulation unit, a second heat exchanger disposed around the hydrogen charging and discharging unit to cool the hydrogen storage alloy by perfusion of refrigerant, and a refrigerant circulation connected to the second heat exchanger and circulating refrigerant through the second heat exchanger A low pressure metal hybrid hydrogen charge and discharge system for a fuel cell including a unit and a control unit for controlling the operation of the heat medium circulation unit and the refrigerant circulation unit is presented as an embodiment.

According to the features of the disclosed content, the hydrogen charging and discharging unit is formed in a plurality, and is connected to the heat medium circulation unit through a heat medium manifold and is connected to the refrigerant circulation unit through a refrigerant manifold.

According to the low pressure metal hybrid hydrogen charge and discharge system for a fuel cell according to the disclosed contents, when the hydrogen is discharged, the heat medium heated by absorption of waste heat of the fuel cell stack flows through the first heat exchanger installed in the hydrogen storage alloy of the hydrogen charge and discharge part. As the hydrogen storage alloy is heated, the hydrogen release efficiency increases, and when storing hydrogen, the hydrogen storage efficiency may increase as the refrigerant flows through the second heat exchanger installed around the hydrogen charging and discharging part and the low temperature environment is formed in the hydrogen storage alloy. There is an advantage.

In addition, according to the low pressure metal hybrid hydrogen charging and discharging system for a fuel cell according to the disclosed contents, energy efficiency is presumably increased as high temperature heat generated from the fuel cell stack is used as a heat source for heating the hydrogen storage alloy in the hydrogen charging and discharging part. It has the advantage of being.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is an overall structural diagram of a low pressure metal hybrid hydrogen charge and discharge system for a fuel cell according to an embodiment of the disclosed subject matter.
2 is an operation diagram when hydrogen is discharged from a low pressure metal hybrid hydrogen charge and discharge system for a fuel cell according to an embodiment of the disclosed subject matter.
3 is an operation diagram of hydrogen storage in a low pressure metal hybrid hydrogen charge and discharge system for a fuel cell according to an embodiment of the disclosed subject matter.

Hereinafter, with reference to the accompanying drawings looks at with respect to the configuration and effect of the preferred embodiment of the disclosed content. For reference, in the drawings, each component is omitted or schematically illustrated for convenience and clarity, and the size of each component does not reflect the actual size. In addition, the same reference numerals refer to the same components throughout the specification, and reference numerals for the same components in individual drawings will be omitted.

1 is an overall structural diagram of a low pressure metal hybrid hydrogen charge and discharge system for a fuel cell according to an embodiment of the disclosed subject matter.

The low-pressure metal hybrid hydrogen charge and discharge system for a fuel cell according to an embodiment of the disclosed content is connected to the fuel cell stack 3 to supply hydrogen to the fuel cell stack 3 and stores hydrogen therein, as shown in FIG. 1. The hydrogen storage and discharging unit 10 in which the possible hydrogen storage alloy 11 is accommodated, and a first heat exchanger 20 provided in the hydrogen charging and discharging unit 10 and heating the hydrogen storage alloy 11 by perfusion of a heat medium ), the heat medium generation unit 30 installed on the fuel cell stack 3 side to generate heat medium through heat exchange with the fuel cell stack 3, and the heat medium generated by the heat medium generation unit 30. A heat exchanger unit 40 for circulating through the heat exchanger 20 and a second heat exchanger 50 disposed around the hydrogen charging and discharging unit 10 and cooling the hydrogen storage alloy 11 by the flow of refrigerant. , Refrigerant circulation unit 60 that is connected to the second heat exchanger 50 and circulates the refrigerant to the second heat exchanger 50, and a control unit that controls the operation of the heat medium circulation unit 40 and the refrigerant circulation unit 60 (70).

Here, the fuel cell stack 3 generates electricity by electrochemically reacting hydrogen supplied from a low-pressure metal-hybrid hydrogen charging and discharging system for a fuel cell and oxygen supplied from an air source according to an embodiment of the disclosed contents, which is a source of hydrogen. .

In the fuel cell stack 3, a negative electrode to which hydrogen is supplied from a low-pressure metal-hybrid hydrogen charging and discharging system for a fuel cell according to an embodiment of the disclosed content, and an anode to which oxygen is supplied from a separate air supply source are separated through an electrolyte member. It has a structure to be formed.

The cathode serves to dissociate hydrogen supplied from a low pressure metal hybrid hydrogen charging and discharging system for a fuel cell according to an embodiment of the disclosure into hydrogen ions (H ⁺ ) and electrons (-), and platinum to promote this dissociation reaction. Catalyst. The positive electrode dissociates from the hydrogen from the oxygen and the cathode from a separate air supply source and then reacts hydrogen ions (H ⁺ ) passing through the electrolyte member to produce water (H ₂ 0) in the form of water vapor. The electrolyte member is interposed between the negative electrode and the positive electrode to separate the negative electrode from the positive electrode, and at the same time allow the movement of hydrogen ions (H ⁺ ).

In the fuel cell stack 3, as the electron (-) generated by dissociation of hydrogen moves from the cathode to the anode, electromotive force is generated between the anode and the cathode to generate electricity. The configuration and operation of such a fuel cell stack 3 are already known, and for the sake of simplicity, further detailed description will be omitted here.

The hydrogen charging and discharging unit 10 is connected to the fuel cell stack 3 to supply hydrogen to the fuel cell stack 3, and at the same time is connected to a hydrogen supply unit 60' to supply hydrogen to the hydrogen supply unit 60'. As a component for storing, a hydrogen storage alloy 11 capable of storing (absorbing and storing) hydrogen is accommodated therein.

The hydrogen storage alloy 11 is a group of alloys capable of reversibly and rapidly storing hydrogen in a gaseous state, and is also called a hydrogen absorbing alloy or a hydrogen storing alloy. The hydrogen storage alloy 11 typically has a characteristic of absorbing hydrogen by heating at room temperature and releasing stored hydrogen when heated, such as lanthanum-nickel alloys such as LaNi ₅ , LaNi ₄ Al, TiFe, etc. Examples include titanium-iron alloys and magnesium-nickel alloys such as Mg ₂ Ni.

Although only one hydrogen charging and discharging unit 10 may be formed, it is preferable that the hydrogen charging and discharging unit 10 may be formed separately in a plurality to increase the hydrogen storage capacity. In addition, the hydrogen charging and discharging unit 10 is preferably divided into two groups to be configured to alternately charge and discharge hydrogen.

The first heat exchanger 20 is provided in the above-described hydrogen charging and discharging unit 10. The first heat exchanger 20 is a component corresponding to a kind of heater that allows the hydrogen stored in the hydrogen storage alloy 11 to be separated and discharged by heating the hydrogen storage alloy 11 by perfusion of the heat medium.

The first heat exchanger 20 may be formed as a coil type heat exchanger through which a heat medium can flow to increase the heat transfer area.

The above-described fuel cell stack 3 is provided with a heat medium generating unit 30. The heat medium generation unit 30 is a constituent member that absorbs high temperature heat generated from the fuel cell stack 3 through heat exchange with the fuel cell stack 3 to generate heat medium.

The heat medium generating unit 30 may be formed as a tubular heat exchanger that flows through the inside of the fuel cell stack 3 with a jig, and at least one of the fuel cell stack 3 itself and the exhaust pipe of the fuel cell stack 3 is provided. It can also be formed in the form of a water-cooled jacket that surrounds and is filled with water.

The heat medium generated by the heat medium generation unit 30 is circulated to the first heat exchanger 20 by the heat medium circulation unit 40. Here, the heat medium is preferably water, but is not limited to water as long as it is a medium capable of heat transfer.

The heat medium circulation unit 40 includes a heat medium supply pipe 41 connecting one side of the heat medium generation unit 30 and one end of the first heat exchanger 20, and the other end of the first heat exchanger 20 and the heat medium generation unit ( 30) is arranged on the heat medium recovery pipe (43) connecting the other side of the heat medium supply pipe (41) or the heat medium recovery pipe (43), and the heat medium in the heat medium generating part (30) is the heat medium supply pipe (41), the first. The heat exchanger 20, the first pump 45 forcibly circulating through the heat medium recovery pipe 43 again into the heat medium generating unit 30, and the heat medium recovery pipe 43 are arranged on the heat medium recovery pipe 43. And a first cooler 47 for cooling the heat medium through which it flows.

In addition, the heat medium circulation unit 40 may further include a heater 49 arranged downstream of the first cooler 47 on the heat medium recovery pipe line 43. In the heater 49, when the heat medium flowing through the first cooler 47 on the heat medium recovery pipe 43 is excessively cooled by the first cooler 47, there is a possibility of causing a problem in the operation of the fuel cell stack 3 By heating the heat medium that has flowed through the first cooler 47 at a constant temperature to be circulated to the heat medium generation unit 30, it is possible to form a variety of known fluid heaters such as a high-frequency induction heating type fluid heater. In addition, a temperature sensor for measuring the temperature of the heat medium is preferably provided between the first cooler 47 and the heater 49.

When the hydrogen charging/discharging unit 10 is formed in a plurality, the heat medium supply pipe 41 and the heat medium recovery pipe 43 are branched through the heat medium manifolds 40a and 40b, and the plurality of first heat exchangers 20 ).

In addition, a second heat exchanger 50 is disposed around the aforementioned hydrogen charging and discharging unit 10. The second heat exchanger 50 cools the hydrogen charging and discharging unit 10 by the flow of refrigerant, thereby forming hydrogen in the hydrogen storage alloy 11 and having a low temperature environment favorable for hydrogen storage, so that hydrogen is added to the hydrogen storage alloy 11. It is a component corresponding to a kind of cooler that can be efficiently stored.

The second heat exchanger 50 may be formed as a coil-type heat exchanger through which a refrigerant can flow to increase the heat transfer area.

The refrigerant circulation unit 60 is connected to the second heat exchanger 50 described above. The refrigerant circulation unit 60 is a component that circulates refrigerant, such as cooling water, to the second heat exchanger 50.

The refrigerant circulation unit 60 includes a refrigerant tank 61 in which cooling water is filled, a refrigerant supply pipe 63 connecting one side of the refrigerant tank 61 and one end of the second heat exchanger 50, and a second It is arranged on the refrigerant return pipe (65) connecting the other end of the heat exchanger (50) and the other side of the refrigerant tank (61), and on the refrigerant supply pipe (63) or the refrigerant recovery pipe (65) to provide forced circulation of the refrigerant. It includes a second pump (67) and a second cooler (69) attached to the refrigerant tank (61) or installed on the refrigerant recovery pipe (65). The second cooler 69 may be formed of the same or similar structure to a conventional chiller.

When a plurality of hydrogen charging and discharging units 10 are formed separately, the refrigerant supply pipe 63 and the refrigerant recovery pipe 65 are branched through the refrigerant manifolds 60a and 60b, and a plurality of second heat exchangers 50 ).

The operation of the heat medium circulation unit 40 and the refrigerant circulation unit 60 described above is controlled by the control unit 70. The control unit 70 selectively operates only one of the heat medium circulation unit 40 and the refrigerant circulation unit 60 depending on whether hydrogen is released or stored.

One side of the refrigerant circulation unit 60 is provided with a hydrogen supply unit (60a) for supplying hydrogen to the hydrogen storage alloy 11 of the hydrogen charging and discharging unit (10). The hydrogen supply unit 60a may be composed of a hydrogen storage tank and a supply pipe in which hydrogen is stored in a high pressure state, and may act as a kind of cooler in contact with the refrigerant circulation unit 60. It is preferable that the hydrogen supply unit 60a is configured such that the supply of hydrogen to the hydrogen storage alloy 11 is performed simultaneously with the supply of the refrigerant as it is operated simultaneously with the refrigerant circulation unit 60. The refrigerant circulation unit 60 and the hydrogen supply unit 60a may form an integrated hydrogen refrigerant supply unit.

2 is an operation diagram when hydrogen is discharged from a low pressure metal hybrid hydrogen charge and discharge system for a fuel cell according to an embodiment of the disclosed subject matter.

When supplying hydrogen to the fuel cell stack 3, the control unit 70 drives the heat medium circulation unit 40 and the refrigerant circulation unit 60 stops.

In this case, as the first pump 45 is operated, as shown in FIG. 2, the heat medium in the heat medium generation unit 30 heated to high temperature through heat exchange with the fuel cell stack 3 is a heat medium supply channel 41. Through the first heat exchanger 20 arranged in the hydrogen storage alloy 11 through, the hydrogen storage alloy of the hydrogen charging and discharging unit 10 by the first heat exchanger 20 through which the hot heat medium flows ( 11) As the heating, the hydrogen emission efficiency increases.

In addition, the heat medium that has passed through the first heat exchanger 20 is introduced into the heat medium generation unit 30 again through the first cooler 47 and the heater 49.

FIG. 3 is an operation diagram when hydrogen is stored in a low pressure metal hybrid hydrogen charge/discharge system for a fuel cell according to an embodiment of the disclosed subject matter.

In the case where hydrogen is to be stored in the hydrogen charging and discharging unit 10, the control unit 70 drives the refrigerant circulation unit 60 and the heat medium circulation unit 40 is stopped.

In this case, as the second pump 47 is operated, as shown in FIG. 3, low-temperature refrigerant in the refrigerant tank 61 is arranged around the hydrogen charging and discharging unit 10 through the refrigerant supply pipe 63. As the second heat exchanger 50 flows through and the hydrogen charging and discharging unit 10 is cooled by the second heat exchanger 50 through which the low-temperature refrigerant flows, a low temperature environment is formed in the hydrogen storage alloy 11. The hydrogen storage efficiency is increased.

In addition, the refrigerant that has flowed through the second heat exchanger 50 is again introduced into the refrigerant tank 61 through the second cooler 69 or cooled by the second cooler 69 after flowing into the refrigerant tank 61. .

2 and 3, it is shown that hydrogen charging and discharging occurred simultaneously in a plurality of hydrogen charging and discharging units 10, but a plurality of hydrogen charging and discharging units 10 are divided into two groups to charge and discharge hydrogen. It is preferably configured to take place alternately.

The low pressure metal hybrid hydrogen charge/discharge system for a fuel cell according to an embodiment of the disclosed subject matter is fueled to the first heat exchanger 20 installed in the hydrogen storage alloy 11 of the hydrogen charge/discharge unit 10 upon release of hydrogen As the hydrogen storage alloy 11 is heated while the heat medium heated by the waste heat absorption of the battery stack 3 is heated, the hydrogen release efficiency is increased, and the second heat exchange installed around the hydrogen charging and discharging unit 10 during storage of hydrogen As the refrigerant flows through the group 50, the hydrogen storage efficiency may be increased as a low temperature environment is formed in the hydrogen storage alloy 11.

In addition, the low pressure metal hybrid hydrogen charge and discharge system for a fuel cell according to an embodiment of the disclosed content, the high temperature heat generated from the fuel cell stack (3) heats the hydrogen storage alloy 11 of the hydrogen charging and discharging unit (10) As it is used as a heat source, energy efficiency can be increased as a whole.

The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the embodiments described in the specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and represent all technical spirits of the present invention. It should be understood that there may be various equivalents and modifications that can replace them at the time of application. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and ranges of the claims It should be construed that any altered or modified form derived from the equivalent concept is included in the scope of the present invention.

3: Fuel cell stack
10: hydrogen charge and discharge unit
11: Hydrogen storage alloy
20: first heat exchanger
30: heating medium generation unit
40: heat medium circulation unit
40a, 40b: Manifold for heat medium
41: heating medium supply pipeline
43: heating medium recovery pipeline
45: first pump
47: first cooler
49: heater
50: second heat exchanger
60: refrigerant circulation unit
60': Hydrogen supply unit
60a, 60b: Manifold for refrigerant
61: refrigerant tank
63: refrigerant supply pipeline
65: refrigerant recovery pipeline
67: second pump
69: second cooler
70: control unit

Claims (6)

A hydrogen charging and discharging unit which is connected to the fuel cell stack and the hydrogen supply unit, and which receives a hydrogen storage alloy capable of storing hydrogen therein;
A first heat exchanger provided in the hydrogen charging and discharging unit and heating the hydrogen storage alloy by perfusion of a heating medium;
A heat medium generation unit installed on the fuel cell stack and generating heat medium through heat exchange with the fuel cell stack;
A heat medium circulation unit for circulating the heat medium generated by the heat medium generation unit to the first heat exchanger;
A second heat exchanger disposed around the hydrogen charging and discharging unit and cooling the hydrogen storage alloy by the flow of refrigerant;
A refrigerant circulation unit connected to the second heat exchanger and circulating refrigerant through the second heat exchanger; And
Low pressure metal hybrid hydrogen charge and discharge system for a fuel cell comprising a control unit for controlling the operation of the heat medium circulation unit and the refrigerant circulation unit. The method according to claim 1,
The hydrogen charging and discharging unit is formed of a plurality, is connected to the heat medium circulation unit through a heat medium manifold and connected to the refrigerant circulation unit through a refrigerant manifold low-pressure metal hybrid hydrogen charge and discharge system for a fuel cell. . The method according to claim 1,
The first heat exchanger is a low-pressure metal hybrid hydrogen charge and discharge system for a fuel cell, characterized in that the heat medium is formed of a coil-type heat exchanger through which heat medium is permeable, and the second heat exchanger is formed of a coil-type heat exchanger through which refrigerant is flowable. The method according to claim 1,
The heat medium generating unit surrounds at least one of the fuel cell stack and the exhaust path of the fuel cell stack, and is formed in a water-cooled jacket type in which water is filled, and a low pressure metal hybrid hydrogen charge and discharge system for a fuel cell. The method according to claim 4,
The heat medium circulation unit includes a heat medium supply line connecting one side of the heat medium generation unit and one end of the first heat exchanger, a heat medium recovery line connecting the other end of the first heat exchanger and the other side of the heat medium generation unit, and the heat medium supply tube It characterized in that it comprises a first pump arranged on the furnace or the heat medium recovery pipe, a first cooler arranged on the heat medium recovery pipe, and a heater arranged downstream of the first cooler on the heat medium recovery pipe. Low pressure metal hybrid hydrogen charge and discharge system for fuel cells. The method according to claim 1,
The refrigerant circulation unit includes a refrigerant tank in which cooling water is filled, a refrigerant supply pipe connecting one side of the refrigerant tank and one end of the second heat exchanger, and the other end of the second heat exchanger and the other side of the refrigerant tank. And a second cooler installed in one of the refrigerant tank or the refrigerant recovery pipe, and a second pump arranged on the refrigerant supply pipe or the refrigerant recovery pipe. Low pressure metal hybrid hydrogen charge and discharge system.

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