KR100873818B1 - Bipolar plate for stack assembly and cascade typed stack assembly in fuel cell system - Google Patents

Abstract

A bipolar plate for stack assembly and a cascade typed stack assembly in a fuel cell system are provided to form compact stack by sealing a manifold which is the flow path of bipolar plate with a gasket. A stack assembly generates the electricity by chemically reacting the supplied fuel (hydrogen) and air (oxygen). The stack assembly forms one unit cell by putting a film - electrode assembly made of a polymer electrolyte membrane between both sides of bipolar plate. The stack assembly is laminated with the unit cell to multi-stage. The bipolar plate of the stack assembly comprises an anode-out manifold(E); a cathode-in manifold(F); and a cathode-out manifold(G).

Description

Bipolar plate for stack assembly and cascade typed stack assembly in fuel cell system}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel cell device, and more particularly to a bipolar plate of a stack assembly and a cascade of a fuel cell device using the same, in which the reactants and the coolant flow passages are connected to each other to realize the same input and output values as the design values. Type stack assembly.

In general, a device for directly converting energy contained in a fuel into electrical energy. A fuel cell includes a pair of electrodes with an electrolyte interposed therebetween, and hydrogen (or fuel gas containing hydrogen) on the surface of one electrode. By contacting and contacting oxygen (or oxygen-containing oxidizing gas) to the surface of the other electrode, it is a method of using the inter-electrode electrical energy generated by the electrochemical reaction generated between the pair of electrodes.

These fuel cells are classified in various ways according to the type of electrolyte used, and polymer electrolyte membrane fuel cells (PEMFC) operate at a relatively low temperature of 100 ° C or lower than other fuel cells. In addition, it has fast startup and response characteristics, and is widely used for mobile power supplies for automobiles, distributed power supplies for homes and public buildings, and small power supplies for electronic devices.

The stack assembly applied to such a PEMFC is usually a membrane made of a polymer electrolyte membrane between a bipolar plate (referred to as a separator) that forms a cathode for supplying hydrogen fuel and an anode for supplying oxygen. The unit cell in which the electrode assembly (MEA; Membrane Electrode Assembly) is located is configured to be stacked in multiple layers.

Since the output of the electrical energy of such a fuel cell varies with various driving conditions such as gas pressure, battery temperature, and gas utilization rate, the driving conditions for these fuel cells are appropriately controlled in various ways to increase the output of the fuel cell.

When operating such a fuel cell, the fuel supplied to the stack must be supplied at least "1" (which is greater than the design value), so that the output of the stack can be "1 (which corresponds to the design value)" In order to obtain the design output regardless of the design characteristics between the fuel supply and the output of the fuel cell, the fuel supply amount supplied to the fuel cell must be supplied with more fuel than the design value.

As a result, a trend is being developed in which a fuel supply of a fuel cell device can be matched to a design value while obtaining the same design output. For example, an extreme blocking of an outlet of a fuel electrode, water discharge and an inert gas discharge can be achieved. A stack assembly for dead-end operation with valve control.

However, as such stack assemblies for dead-end operation have severe fluctuations in performance, they are critically vulnerable to the lifetime of the stack assembly. There is a need to develop assemblies.

Accordingly, the present invention has been made in view of the above, and a bipolar plate (Bipolar) constituting a unit cell together with a stacked membrane-electrode assembly (MEA) of a stack generating electricity is formed. Cascade of cascade to increase fuel utilization by using manifolder structure which is gas and air and coolant supply / exhaust flow passage formed in plate ) To build a fuel cell system.

In addition, the present invention is to build a separate stack stage (Bipolar plate) in which the flow path of the bipolar plate (Gai, air and coolant supply / discharge flow is connected to each other, the same flow path for each manifold (Manifolder) The manifold shape change of the bipolar plate is carried out as the flow paths between the independent stack stages stacked on each other in a state of being processed into a shape and partitioned by bipolar plates stacked with the same manifold shape. In addition to minimizing, the purpose is to simplify the processing of bipolar plates.

In addition, the present invention provides a dummy bipolar plate that does not include a flow channel or a membrane electrode assembly (MEA) in order to partition each independent stack stage formed of bipolar plates stacked on each other. By using a dummy bipolar plate, the objective is to build a cascade type fuel cell system that simplifies the configuration of each stack stage that is independent and has flow paths to each other.

In addition, the present invention is stacked in multiple stages to form a cascade (Cascade), while airtight to a manifold formed bipolar plate (flow path) in which fuel (hydrogen), air (oxygen), coolant (Coolant) flows, etc. By providing a gasket function for the purpose, the purpose is to build a more compact stack by preventing stack thickness increase due to the use of a separate gasket.

The present invention for achieving the above object is a membrane-electrode assembly (MEA; Membrane Electrode Assembly) made of a polymer electrolyte membrane to generate electricity by causing a chemical reaction through the supplied fuel (hydrogen) and air (oxygen) In a stack assembly in which a bipolar plate is padded on both sides to form one unit cell, and the unit cells are stacked in multiple stages.

One of the top edges forms an anode-in manifold that forms the anode (fuel) inlet anode, and the processed fuel flow channel connects to the flow field channel except the sides on the opposite bottom edge. To form an anode-out manifold that forms the fuel (hydrogen) exhaust anode.

A cathode-in manifold forming an air (oxygen) inflow cathode (cathode) is formed at an upper upper corner portion of the upper side where the anode-in manifold is formed, and is independent of the flow field channel at the lower side corner of the opposite side. Connected to the air flow channels processed to form a cathode-out manifold that forms an air (oxygen) exhaust cathode;

The anode-in-out manifold and the cathode-in-out manifold are based on the main in channel forming the main inflow / outflow passage, and are spaced apart or joined to the side peripheral area of the main in channel to form an auxiliary passage. As a plurality of sub in and out channels are processed, the inflow and outflow path shape is changed to form a variable shape end,

As a side space in which the cathode-in manifold and the anode-out manifold are not formed, and in the side space in which the anode-in manifold and the cathode-out manifold are not formed, water generated by a chemical reaction (Water ) And bipolar plates with left and right sub manifolds, which are inlet and outlet passages connected to the water and coolant flow channels, each independently processed in the flow field channel, to prevent the accumulation of heat generated. It characterized by using.

In addition, the anode cathode in manifold is based on a main in channel processed to form a main inflow passage, and the first and second sub in channels are spaced apart from each other while spaced apart from an upper end of the main in channel. Are formed to form a pair, and the third and fourth sub-in channels are formed to form a pair at intervals from each other in a state spaced apart from one side of the main in channel,

The anode-out manifold is based on a main in channel processed to form a main inflow passage, and a first sub out channel is formed in a state spaced apart from one side of the main in channel, and the main in channel The second, third and fourth sub-out channels are formed in pairs at intervals apart from each other at a lower side of the

In addition, the inlet passage for forming the left and right sub manifolds to evaporate the water generated by the chemical reaction from the outside of the stack assembly is located at the right side of the anode-in manifold and the cathode-in manifold, respectively. An in-cathode manifold and a left water-in anode manifold are formed,

The discharge passages which are introduced and discharged through the processed flow channels independently of the flow field channels are located on the anode-out manifold and cathode-out manifold side respectively, the left water-out cathode manifold and the right water-out anode manifold Is formed

In addition, the flow passage for circulating coolant to form the left and right sub manifold to prevent internal heat accumulation,

The left coolant channel formed between the water-in cathode manifold and the water-out anode manifold, and the right coolant channel formed between the water-in anode manifold and the water-out cathode manifold. The left and right coolant channels are processed into the same shape.

The anode in-out manifold, left and right sub manifolds, and cathode in-out manifolds are characterized by being hermetically treated using a gasket.

In addition, the present invention for achieving the above object is the main in / out on the basis of the main in / out channel of the stack assembly consisting of a multi-stage stack having a cascade type of fuel cell device forming a main inlet / outlet passage, A variable profile consisting of a number of sub-in and out channels forming auxiliary passages, spaced apart or joined to the lateral periphery of the channel, has an anode-in manifold and air (oxygen), each of which is a fuel (hydrogen) inlet at each top corner. In addition to forming an inlet cathode-in manifold, the anode-out manifold, which is a fuel (hydrogen) outlet, and a cathode-in manifold, which is an air (oxygen) outlet, are formed so as to cross each other at both bottom edges.

The left-side passage is a passage for circulating coolant for preventing heat accumulation and discharging water due to a chemical reaction to a side space in which the anode-in-out manifold and the cathode-in-out manifold are not formed. A general purpose bipolar plate on which the right sub manifold is processed;

The general-purpose bipolar plate is padded to form an anode side B / P block (BiP plate block) supplied with fuel to one side of a membrane-electrode assembly (MEA) made of a polymer electrolyte membrane, and air (oxygen) Unit cell padded to form a cathode-side B / P block (BiP plate block) supplied with (), and having one basic unit;

The unit cells are continuously stacked to form a plurality of stages connected to each other, and a dummy B / P (dummy bipolar plate) in which a manifold and a flow channel are selectively processed is disposed between each stage. Stack stages each forming an independent section;

It is characterized by being built as.

The stack stage is constructed of first, second, third, fourth, and fifth stack stages partitioned by dummy B / P, and the first, second, third, fourth, and fifth stack stages are formed on one side of the membrane-electrode assembly. 1/2, 3, 4, and 5 anode side B / Ps having variable shape ends, which are passages for introducing and discharging fuel (hydrogen), and air (oxygen) on opposite sides of the membrane-electrode assembly. 1), 2, 3, 4, and 5 cathode side B / Ps each having a variable shape end, which is a passage for inflow and outflow,

  The inflow passage variable shape ends of the first, second, third, fourth, and fifth anode side B / Ps, and the first, second, third, fourth, and fifth cathode side B / Ps are main from the top side with respect to the main in channel. A pair of first and second sub in channels spaced apart from each other and spaced from each other, and a pair of third and fourth sub in channels spaced apart from each other and spaced apart from the main in channel on one side of the main in channel. It consists of an anode cathode in manifold which forms an anode cathode in channel, respectively,

The discharge passage variable end comprises a first sub out channel spaced apart from the main in channel on one side of the main out channel and a pair of spaced apart spaced apart from the main in channel on the lower side of the main out channel. It consists of an anode cathode out manifold which forms an anode cathode out channel using 2, 3 and 4 sub out channels, respectively.

The left-right sub-manifold formed between the anode-in-out manifold and the cathode-in-out manifold includes a water-in-out anode for evaporating water generated by a chemical reaction outside the stack assembly. The manifold is positioned between the space of the cathode-in channel and the anode-out channel, with the left coolant channel for coolant flow being formed among them,

The water-in-out cathode manifold is located between the space of the anode-in channel and the cathode-out channel, among which a right coolant channel for coolant flow is formed.

According to the present invention, each stack stage using a bipolar plate stacked together with a membrane-electrode assembly (MEA) in a stack for building a fuel cell system And efficiently connects the Manifolder, which is a flow path of a bipolar plate, through which fuel (hydrogen), air (oxygen) and coolant flow, etc., between independent stack stages. As a result, cascade type cascades are constructed so that fuel supply and output can be implemented in the same manner as the design value, and the fuel utilization rate can be increased.

In addition, according to the present invention, a manifold, which is a flow path formed in a bipolar plate stacked in multiple stages to form a cascade type, has a basic structure and forms an independent stack stage. In addition to minimizing the design change of the manifold design of the bipolar plates stacked in stages, the manifold machining process of the bipolar plates can be simplified.

In addition, the present invention forms an airtight gasket in a manifold, which is a flow path of a bipolar plate, which is stacked in multiple stages to form a cascade type, thereby increasing stack thickness according to the use of a separate gasket. This will have the effect of building a more compact stack.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the exemplary embodiments of the present invention may be implemented in various different forms by one of ordinary skill in the art to which the present invention pertains, It is not limited to an Example.

1 is a block diagram of a general-purpose bipolar plate constituting the stack assembly of a fuel cell device according to the present invention, the present invention comprises a stack assembly (1) constituting a fuel cell to generate electricity Basic Bipolar plate (A) laminated with a membrane-electrode assembly (MEA) interposed therebetween to produce a chemical reaction for

Manifold field channels (Anode) and cathode (Cathode) are formed on both sides of each side, and a flow passage through which coolant circulates and discharges the generated water. B, a manifolder field channel (B) region, and the inner main space region where the manifold field channel (B) is not formed, gas (hydrogen), air (oxygen), coolant and water (Water) Independent flow channels form flow field channels (C) to flow in and flow out without mixing with each other.

The general-purpose bipolar plate (A) is made of various materials. For example, the general-purpose bipolar plate A is manufactured using a metal material, a graphite material, or an inorganic material such as a composite resin material or a silicon material.

The fuel cell constructed using such a general-purpose bipolar plate (A) is a polymer electrolyte (membrane) type fuel cell (PEMFC).

In addition, the manifold field channel B is processed with anode-in-out manifolds D and E forming a gas (hydrogen) flow channel, which is an anode, and a cathode. Cathode-in-out manifolds (F, G) forming in-air (oxygen) flow channels are processed.

In addition, the manifold field channel (B) is provided between the anode-in manifold (D) and the cathode-out manifold (G) and the cathode-in manifold (F) and the anode-out manifold (E), The left and right sub-manifolds I and J, which are channels through which coolant flows, are processed to discharge water generated by the electrochemical reaction and cool the stack heat.

In addition, the anode-in-out manifold (D, E) and the cathode-in-out manifold (F, G) are processed in the flow field channel (C) to connect each other in the maximum path, that is, the anode If the -in manifold (D) and the cathode-in manifold (F) are formed at one upper corner, the anode-out manifold (E) and the cathode-out manifold (G) cross the flow field channel (C). The squeeze is formed on the opposite bottom corner.

In this case, the anode-in manifold (D) and the cathode-in manifold (F) is formed on the upper edge portion of both sides, respectively, the anode-out manifold (E) and cathode-out manifold (G) Are each formed at the lower edge portions of both sides.

 The anode-in-out manifold (D, E) and the cathode-in-out manifold (F, G) form a common flow structure, and the general-purpose bipolar plate (A) is stacked to form an independent stage ( Even if the stage is formed, the processing process can be minimized while minimizing the design change of the manifold (D, E, F, G).

To this end, the anode-in manifold (D) and the cathode-in manifold (F) has the largest main in channel (ha) is processed to form a main flow passage, the side around the main in channel (ha) side area Sub-in channels are formed that are spaced apart or joined together to form an auxiliary flow path.

Here, the sub-in channel is formed such that the first sub-in channel (hb, hc) is formed in a pair with a spaced apart from each other in the upper side of the main in channel (ha), the main in channel ( In the state spaced apart on one side of ha), the third and fourth sub-in channels hd and he are formed to form a pair at intervals from each other.

In this case, the third and fourth sub-in channels hd and he are positioned outward of the general-purpose bipolar plate A.

In addition, the main out channel (Ha) is processed the largest to form the main flow passage also in the anode-out manifold (E) and the cathode-out manifold (G), the side peripheral area of the main out channel (Ha) Sub out channels are formed that are spaced apart or joined together to form an auxiliary flow path.

Here, the sub out channel is formed with a first sub out channel Hb in a state spaced apart from the side of the main out channel Ha, and a second in a state spaced apart from one lower side of the main out channel Ha. 3 and 4 sub out channels Hc, Hd and He are formed in pairs at intervals from each other.

In this case, the first sub out channel Hb is positioned outward of the general-purpose bipolar plate A.

In addition, since the second, third and fourth sub out channels Hc, Hd, and He constituting the anode-out manifold E and the cathode-out manifold G are positioned downward in the stack, When discharged, the water produced by the electrochemical reaction is collected underneath to make the discharge easier.

In addition, in the left and right sub-manifolds (I, J), a flow passage is formed on the anode side and the cathode side to discharge and separate the water generated in the stack during the electrochemical reaction, and the water (Water) Between the flow paths, left and right coolant channels Qa and Qb, which are flow paths through which coolant circulates, are formed to cool the heat generated by the electrochemical reaction of the stack.

For this purpose, the anode-side water flow passage is machined with a water-in anode manifold Ka toward the anode-out manifold E, and a water-out anode manifold toward the anode-in manifold D. Kb is formed so that water introduced from the water-in anode manifold Ka is discharged across the flow field channel C to the opposite water-out anode manifold Kb.

At this time, the water-out anode manifold Kb is positioned downward compared to the water-in anode manifold Ka, which is located downward in the stack to facilitate discharge.

In addition, the cathode-side water flow passage is processed with a water-in cathode manifold Pa toward the anode-in manifold D, and the water-out cathode manifold E toward the anode-out manifold E. Pb) is formed so that water introduced from the water-in cathode manifold Pa is discharged across the flow field channel C to the opposite water-out cathode manifold Pb.

At this time, the water-out cathode manifold (Pb) is also located downward compared to the water-in cathode manifold (Pa), which is located downward in the stack to facilitate the discharge.

In addition, a separate humidifier is installed to evaporate the water discharged out of the stack through the water-in-out cathode manifolds Pa and Pb, i.e., the humidifier is a gas phase / liquid phase separator. It consists of a membrane-type membrane humidifier through which the liquid water separated through) passes through the membrane, and the water separated while passing through the membrane is used for humidification of the first stack stage 4, but the gas from the separation stage is then transferred to the stack stage. Used as an input stage, this is a device that is applied universally in the fuel cell device.

In addition, the left and right coolant channels Qa and Qb are coolant flow passages for cooling heat generated by the electrochemical reaction of the stack, and the left coolant channels Qa are moved to the left. It is processed between the formed water-in anode manifold Ka and the water-out cathode manifold Pb, and the right coolant channel Qb is water-in with the water-out anode manifold Kb formed to the right. It is machined between cathode manifolds (Pa).

On the other hand, the anode (cathode) and the cathode (cathode) are formed on both sides of the basic bipolar plate (A, Basic Bipolar plate), respectively, and are independent of each other so that coolant and water flow. The manifold field channel B in which the flow channel is processed is airtight, that is, the gasket function is provided to the manifold field channel B which forms a flow passage in a state in which the universal bipolar plates A are stacked on each other. Will be

In this case, when the manifold field channel B formed on the general-purpose bipolar plate A is formed by using a gasket having elastic properties, the stack thickness can be prevented from increasing and a more compact stack can be constructed. do.

Here, the gasket is a silicone-based, fluorine-based material having elasticity, but can be used as a liquid type gasket.

The anode-in-out manifolds (D, E) for gas (hydrogen) flow and the cathode-in-out manifolds (F, G) for air (oxygen) flow are processed on both sides. In addition to the manifold field channel (B), a stack assembly (1) using a general-purpose bipolar plate (A) in which left and right sub-manifolds (I, J) for water discharge and coolant flow are processed. ).

That is, the unit cell is composed of the anode and cathode side universal bipolar plates A with the membrane-electrode assembly (MEA) interposed therebetween, and the unit cells are sequentially stacked to form a stack assembly. If the manifold field channel B formed on both sides of the bipolar plate A is hermetically treated with an elastic gasket, it is possible to construct a compact structure with little increase in stack thickness.

The construction of the stack assembly 1 using such a general-purpose bipolar plate A is particularly multi-stage structure, such as the cascade type, which supplies fuel supply at a design value while matching a design output to form a more efficient fuel cell device. Become more effective in a stack assembly having a.

This is because the universal bipolar plate A, which is stacked in a plurality of stages that are independent and associated with each other, and forms a stack, is universal, that is, gas (hydrogen), air (oxygen) and coolant ( Manifold field channels (B) processed to form flow paths such as coolants are stacked in the same shape at each step, and the manifolds connect flow paths between independent stages. This is due to the fact that the field channel B has the same basic structure and the processability with little design change.

As such, the fuel cell device can be constructed using the stack assembly 1 using the general-purpose bipolar plate A as the cascade type, and as shown in FIG. 2, the stack assembly 1 is a membrane-electrode assembly (MEA). An anode-side B / P block (2, Bipolar Plate Block) to which fuel (H2) is supplied, and a cathode side to which air (O2) is supplied, with a general-purpose bipolar plate (A) with a unit cell interposed therebetween. B / P blocks (3, Bipolar Plate Block) are constructed in independent stages followed by flow passages.

Each of the independent stages constituting the stack assembly 1 can increase or decrease the number of stages as needed, and in this embodiment, a state of being constructed in five stages will be described. do.

That is, the stack assembly in which the anode side B / P block 2 and the air O2 have the cathode side B / P block 3 in five stages with the membrane-electrode assembly MEA interposed therebetween ( When 1) is constructed, the stages each use a dummy B / P (9, Dummy Bipolar Plate) to form an independent section. 6, 7, 8).

At this time, the dummy B / P (9) has a function of independently forming the flow passage while the flow passage of the first, second, three, four, and five stack stages (4, 5, 6, 7, 8) are connected to each other Done.

The first, second, third, fourth, and fifth stack stages 4, 5, 6, 7, and 8 have the same structure as the general-purpose bipolar plate A stacked on each stage. However, the stage and the stage use a universal bipolar plate A having a different structure, but as the manifold field channel B of the universal bipolar plate A has the same basic structure, a design change is made. Almost no.

That is, the first, second, third, fourth, fifth, fourth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth, fifth and fifth of the stack stages 4, 5, 6, 7, and 8 of the first, second, third, fourth The five anode side B / Ps 10, 11, 12, 13, and 14 are each anode-in-cathode- in accordance with each stack stage 4, 5, 6, 7, and 8, as shown in FIG. As the processing structures of the in manifold (D, F) and the anode-out cathode-out manifold (E, G) are different, the fuel (H2) supplied is the first, second, third, fourth, fifth. Each stack stage 4,5,6,7,8 continues in series to form a flow.

In addition, the left-right sub-manifolds I and J of the first, second, third, fourth, and fifth anode side B / Ps 10, 11, 12, 13, and 14 are provided with a water-in-out anode manifold. Water flow passages are formed by the folders Ka and Kb and the water-in-out cathode manifolds Pa and Pb, and the left and right coolans, which are flow passages through which coolant circulates, are formed between the flow passages. Coolant channels Qa and Qb are formed, and they all have the same shape and structure.

In addition, the air (O2) supply portion of the first, second, third, fourth, and fifth stack stages (4, 5, 6, 7, and 8) constituting the stack assembly (1), as shown in FIG. (H2) 1st, 2nd, 3rd, 4th, 5th, 5th, 5th, 5th, 5th, 5th, 5th, 5th, and 5th anodes (1, 2, 3, 4, 5) with the same structure as the first, 2, 3, 4, 5 anode side B / P P (10 ', 11', 12 ', 13', 14 ').

This is because the unit cell constituting the stack assembly 1 has a membrane-electrode assembly (MEA) therebetween, and the B / P anode side B / P (10, 11, 12, 13) on one side thereof. , 14) are padded, and opposite to the first, second, third, fourth, and fifth cathode side B / Ps 10 ', 11', 12 ', 13', and 14 ', which form the same structure, It is caused by the padding.

Such first, second, third, fourth, and fifth anode side B / Ps (10, 11, 12, 13, and 14) and the first, second, third, fourth and fifth cathode side B / Ps (10 ', 11) Manifold field channels B of ', 12', 13 ', and 14' will be described in more detail with reference to Figs.

That is, the first anode side B / P 10 stacked on the first stack stage 4 constituting the stack assembly 1 has an anode-in manifold D on one edge top as shown in FIG. 5. ) To form the anode-in channel 15a, which is the inlet of the feed fuel H2.

The anode-in channel 15a is formed using a main in channel ha and a first sub-in channel hb, hc forming an upper side thereof, that is, the main in channel ha is formed on an upper side thereof. The first and second sub in channels hb and hc are connected to each other, and the anode in manifold D uses the main in channel ha and the first and second sub in channels hb and hc. The anode-in channel 15a is processed.

At this time, the third and fourth sub-in channels hd and he which are located toward the side of the main in-channel ha are not processed.

In addition, the anode-out channel 15aa formed in the anode-out manifold E as the supply fuel H2 outlet has the main out channel Ha and the first, second, and third sub-out channels Hb and Hc. It is formed by processing all Hd and He).

That is, the anode-out channel 15aa processes the main out channel Ha, and the first sub out channel Hb is independently processed while being spaced apart from one side of the main out channel Ha. The second, third and fourth sub out channels Hc, Hd, and He processed to the lower side of the main out channel Ha are connected to the main out channel Ha to be formed to be integrated.

In addition, the cathode-in channel 16a, which is the air O2 supply inlet of the first anode side B / P 10, is formed using the cathode-in manifold F at the upper end of one corner.

That is, the cathode-in channel 16a is formed using a fourth sub-in channel he formed on one side with the main-in channel ha, which is a main in when the main in channel ha is processed. The fourth sub-in channel he is processed independently of one side of the channel ha, and the first, second, and third sub-in channels hb, hc and hd are excluded except for the fourth sub-in channel he. ) Does not process.

The cathode-out channel 16aa formed at the cathode-out manifold G, which is the supply air O2 outlet, is processed into one space, that is, the main-out channel Ha and the first and second sides formed on the side thereof. The 3 · 4 sub out channels (Hb, Hc, Hd, He) are connected to each other to form a space.

In addition, the left and right sub-manifolds I and J formed on the first anode side B / P 10 are processed by the left and right coolant channels Qa and Qb, which are coolant flow passages. In addition, a flow passage for discharging water according to an electrochemical reaction is processed at intervals in the upper and lower positions based on the left and right coolant channels Qa and Qb.

In addition, the flow passage for discharging water is processed with a water-in anode manifold Ka and a water-out cathode manifold Pb to the left of the first anode side B / P 10. On the opposite side, the water-in cathode manifold Pa and the water-out anode manifold Kb are machined.

Meanwhile, the first cathode side B / P 10 'constituting the first stack stage 4 has a structure in which the first anode side B / P 10 of the same structure is turned upside down. The first anode side B / P 10 is padded on one side via a membrane-electrode assembly (MEA), and the first cathode side B / P 10 'of the same structure is padded on the other side. This is due to the structure constituting the unit cell for constructing the stack assembly 1.

In addition, as shown in FIG. 6, the second anode side B / P 11 stacked on the second stack stage 5 uses the anode-in manifold D at the top of one corner to supply the fuel H2. ) To form an anode-in channel 15b that is an inlet.

That is, the anode-in channel 15b is processed such that the fourth sub-in channel he is connected to each other at one side of the main in channel ha while the main in channel ha is processed. The first and second sub in channels hb and hc positioned on the upper side of the main in channel ha and the third sub in channel hd positioned to the side are not processed.

In addition, the anode-out channel 15bb, which is the supply fuel H2 outlet, includes the main out channel Ha and the first and fourth sub out channels Hb and He, except for the second and third sub out channels Hc and Hd. ) Is formed by connecting them.

The cathode-in channel 16b, which is the inlet of the supply air O2 using the cathode-in manifold F formed on the second anode side B / P 11 on the opposite side of the feed fuel H2, is formed in the first 2 and 3 sub-in channels (hb, hc, hd) are not processed, but are formed using the main in channel (ha) and the fourth sub-in channel (he) spaced on one side thereof and air (O2). The cathode-out channel 16bb is connected to the main out channel Ha and the first, second, third and fourth sub-out channels Hb, Hc, Hd, and He to be processed into one space.

In addition, the left and right sub-folders I and J formed on the second anode side B / P 11 also have the same left and right Coolant channels as the first anode side B / P 10. Qa and Qb are processed, and the water-in anode manifold Ka and the water-out cathode manifold Pb are spaced at an upper and lower positions with respect to the left and right coolant channels Qa and Qb, respectively. In addition, the water-in cathode manifold Pa and the water-out anode manifold Kb are respectively processed.

In the second stack stage 5, similarly to the first stack stage 4, the second cathode side B / P 11 ′ has the same structure as the second anode side B / P 11.

In addition, the third anode side B / P 12 stacked on the third stack stage 6 is supplied with the fuel H2 using the anode-in manifold D at the top of one corner as shown in FIG. 7. ) To form an anode-in channel 15c that is an inlet.

That is, the anode-in channel 15c is connected to each other while the first sub-in channel hb above the main in channel ha is processed, and is connected to one side of the main in channel ha. The fourth sub-in channel he is spaced apart and processed, and the third sub-in channel hd positioned laterally with the first sub-in channel hc is not processed.

In addition, the anode-out channel 15cc, which is the supply fuel H2 outlet, has a main out channel Ha and a fourth subout channel He except for the first, second and third subout channels Hb, Hc, and Hd. ) Is formed by connecting them to each other.

The cathode-in channel 16c, which is the inlet of the supply air O2 using the cathode-in manifold F formed on the third anode side B / P 11 on the opposite side of the feed fuel H2, has a first 2 and 3 sub-in channels (hb, hc, hd) are not processed, but are formed using the main in channel (ha) and the fourth sub-in channel (he) spaced on one side thereof and air (O2). The cathode-out channel 16cc, which is an outlet, connects the main out channel Ha and the first, second, third and fourth sub-out channels Hb, Hc, Hd, and He to be processed into one space.

In addition, the left and right sub manifolds I and J formed on the third anode side B / P 12 also have the same left and right coolants as the first and second anode side B / Ps 10 and 11. As well as the coolant channels Qa and Qb, the water-in-out anode manifolds Ka and Kb and the water-in and out cathode manifolds Pa and Pb are respectively processed.

In the third stack stage 6, the third cathode side B / P 12 ′ has the same structure as the third anode side B / P 12, similarly to the first and second stack stages 4 and 5. .

Further, as shown in FIG. 8, the fourth anode side B / P 13 stacked on the fourth stack stage 7 uses the anode-in manifold D at the top of one corner to supply the fuel H2. ) To form an anode-in channel 15d.

At this time, the anode-in channel 15d has the same structure as the anode-in channel 15c of the third anode side B / P 12, and also has an anode-out channel (outlet of feed fuel H2) 15dd) is also processed to have the same structure as the anode-out channel 15cc.

The cathode-in channel 16d, which is the inlet of the supply air O2 using the cathode-in manifold F formed on the fourth anode side B / P 13 on the opposite side of the feed fuel H2, is formed in the first 2. The 3 sub-in channels hb, hc, hd are not processed, and the main in channel ha and the fourth sub-in channel he processed on one side thereof are connected to each other.

In addition, the cathode-out channel 16dd, which is an air O2 outlet, is processed by connecting the main out channel Ha and the fourth sub out channel He, and the first, second and third sub out channels Hb and Hc. , Hd) is not processed.

In addition, the left and right sub-manifolds I and J formed on the fourth anode side B / P 13 are also left and right in the same manner as the first and second anode side B / Ps 10, 11 and 12. In addition to the coolant channels Qa and Qb, the water-in-out anode manifolds Ka and Kb and the water-in and out cathode manifolds Pa and Pb are respectively processed.

In the fourth stack stage 7, the fourth cathode side B / P 13 'is similar to the fourth anode side B / P 13, similarly to the first, second and third stack stages 4, 5 and 6. It is made of the same structure.

In addition, the fifth anode side B / P 14 stacked on the fifth stack stage 8 is supplied with fuel H2 using the anode-in manifold D at the top of one corner as shown in FIG. 9. ) To form an anode-in channel 15e that is an inlet.

At this time, the anode-in channel 15e has the same structure as the anode-in channel 15d of the fourth anode side B / P 13 and also has an anode-out channel (outlet of feed fuel H2). 15ee) is also processed to have the same structure as the anode-out channel 15dd.

The cathode-in channel 16e, which is the inlet of the supply air O2 using the cathode-in manifold F formed on the fifth anode side B / P 14 on the opposite side of the feed fuel H2, is formed in the third anode. 4 sub-in channels hd and he are not processed, and the main in channel ha and the first and second sub-in channels hb and hc which are processed on the upper side thereof are connected to each other.

In addition, the cathode-out channel 16ee, which is an air (O2) outlet, is formed by connecting the main out channel Ha and the second, third and fourth sub-out channels Hc, Hd, and He processed at the lower side thereof. The first sub out channel Hb processed on one side of the main out channel Ha is processed so as not to be spaced apart.

In addition, the left and right sub-manifolds I and J formed in the fifth anode side B / P 14 also have the first, second, third and fourth anode side B / Ps 10, 11, 12, and 13; Similarly, the left and right Coolant channels Qa and Qb, as well as the water-in-out anode manifolds Ka and Kb and the water-in and out cathode manifolds Pa and Pb, are respectively processed. .

In the fifth stack stage 8, the fifth cathode side B / P 14 ′ has the fifth anode side B / P, similarly to the first, second, third, and fourth stack stages 4, 5, 6, and 7. It has the same structure as (14).

As such, when the stack assembly 1 is cascaded and the first, second, third, and fourth stack stages 4, 5, 6, 7, and 8 are constructed, the first, second, third, and fourth 5 of the first, second, third, fourth, and fifth anode side B / Ps (10, 11, 12, 13, and 14), which are unit cells constituting each stage of the stack stages (4, 5, 6, 7, and 8). Anode-in-out channels 15a, 15b, 15c, 15d, 15e, 15aa, 15bb, 15cc, 15dd, 15ee, and the 1, 2, 3, 4, 5 cathode side B / P (10 ', 11) As the cathode in and out channels 16a, 16b, 16c, 16d, 16e, 16aa, 16bb, 16cc, 16dd, and 16ee of ', 12', 13 ', and 14' are stacked with different shapes, the In order to obtain the output value 1 designed in the stack assembly 1, the input values of the fuels H2 and O2 can be set to 1, thereby increasing fuel utilization.

That is, even if the input value is 1 in order to obtain the output value 1 in the stack assembly 1, the second, third, and fourth stack stages 5, 6, after the input value passes through the first stack stage 4, 1. As the intermediate input value and the intermediate output value of each stack stage are changed to greater than 1 while passing through 7) sequentially, and the output value generated by the final fifth stack stage 8 becomes 1, the fuel utilization rate It will be characterized in that the cascade (Cascade) type stack assembly (1) to increase the.

In the operation of the cascade type stack assembly 1 of the present invention, the fuel (H2, O2) is circulated using a reformer, the coolant is circulated for temperature control, and the discharged water is evaporated using a heater. The various devices configured to utilize and accumulate the generated electricity are necessary devices that are generally provided when constructing a fuel cell device using a stack assembly, and thus description of the operation thereof will be omitted.

Next, the operation of the cascade type stack assembly 1 will be described with reference to FIGS. 2 to 4. In the stack assembly 1, the first anode side B / P ( 10) and the anode-in channel 15a of the first anode side B / P 10 when the input values of the fuel amounts H2 and O2 are respectively supplied toward the first cathode side B / P 10 '. ) And the cathode-in channel 16a of the first cathode side B / P 10'and then through the flow channel to the anode-out channel 15aa and the cathode-out channel 16aa. Emitted with an output value greater than one.

At this time, the inflow and discharge of fuel (H2, O2) exits the first stack stage 4 while sequentially passing through the unit cells constructed in a line, and is input again to the second stack stage (5), which This is because the first anode side B / P 10 and the first cathode side B / P 10 'are composed of one unit cell together with the membrane-electrode assembly.

That is, together with the anode-in-out channels 15a and 15aa of the first anode side B / P 10 into which the fuel H2 flows in and out, the first cathode side B through which air O2 flows in and out Each unit cell stacked when the shape of the cathode-in-out channels 16a and 16aa of the / P 10 'is input to the fuel H2 and O2 input to the first stack stage 4 is 1. While sequentially passing through the output value is discharged to the first stack stage 4 is greater than 1 to form a two-stage input value.

Subsequently, when a second stage input value larger than the initial input value 1 is input to the second stack stage 5 in the first stack stage 4 to which the initial input value 1 is supplied, the second stack stage 5 may be configured. In addition to the anode-in-out channels 15b and 15bb of the second anode-side B / P 11 stacked in multiple, the cathode-in-out channel 16b of the second cathode side B / P 11 ' 16bb), and thus, the second stack stage 5 discharges a three stage input value smaller than the two stage input value but larger than the initial input value 1.

Thereafter, when the third stage input value generated in the second stack stage 5 to which the second stage input value is supplied is input to the third stack stage 6, the second stage input value is the same in the third stack stage 6. In addition to the anode in and out channels 15c and 15cc of the third anode side B / P 12, the cathode in and out channels 16c and 16cc of the third cathode side B / P 12 'are connected. After roughing, it discharges 4 input value smaller than 3 input value.

Subsequently, when the fourth stage input value generated in the third stack stage 6 to which the three stage input value is supplied is input to the fourth stack stage 7, the fourth stage input value is the same in the fourth stack stage 7. In addition to the anode in and out channels 15d and 15dd of the fourth anode side B / P 13, the cathode in and out channels 16d and 16dd of the fourth cathode side B / P 13 'are connected. After roughing, it discharges the 5 input value smaller than the 4 input value.

Subsequently, when the fifth stage input value generated in the fourth stack stage 6 to which the fourth stage input value is supplied is input to the fifth stack stage 8, the fifth stage input value is the same in the fifth stack stage 7. In addition to the anode-in-out channels 15e and 15ee of the fifth anode side B / P 14, the cathode-in-out channels 16e and 16ee of the fourth cathode side B / P 14 'are connected. After coarse, it produces a final output value 1 that is less than the 5-stage input value and equals the initial input value 1.

As the cascade type stack assembly 1 is operated by receiving the fuels H2 and O2, that is, the initial input value 1 input to the first stack stage 4 becomes the second, third, and fourth stack stages 5,. 6,7) generates output values of each stack stage that are sequentially smaller than the initial input value 1, and the output values are supplied as sequential input values to each stack stage leading to the cascade type, and then the final step The final output value generated via the fifth stack stage 8 is generated equal to the initial input value 1.

In this operation, the water generated in the stack assembly 1 sequentially passes through the second, third, and fourth stack stages 5, 6, 7, and 8 via the first stack stage 4. 1, 2, 3, 4, 5 anode side B / P (10, 11, 12, 13, 14) and 1, 2, 3, 4, 5 cathode side B / P (10 ', 11'). Gas / liquid separator after exiting through the water-in-out anode manifold (Ka, Kb) and water-in-out cathode manifold (Pa, Pb) formed in The separated liquid water, which is separated through a separator, is used to humidify the first stack stage 4 while passing through the membrane of the membrane humidifier, but the gas from the separation stage is then used as an input stage of the stack stage.

In addition, a coolant for preventing heat accumulation generated in the stack assembly 1 is also provided with the first, second, third, fourth and fifth anode side B / Ps 10, 11, 12, 13, and 14, First and second through the left and right coolant channels Qa and Qb formed on the first, second, third, and fourth cathode side B / Ps 10 ', 11', 12 ', 13' and 14 '. Cycle through stack stages 4, 5, 6, 7, and 8.

1 is a block diagram of a general-purpose bipolar plate constituting a stack assembly of a fuel cell device according to the present invention.

2 is a configuration diagram of a stack assembly constructed in multiple stages to form a cascade type of a fuel cell device according to the present invention;

3 is a configuration diagram of an anode side bipolar plate constituting a stack assembly built in multiple stages to form a cascade type according to the present invention.

4 is a configuration diagram of a cathode side bipolar plate constituting a stack assembly built in multiple stages to form a cascade type according to the present invention.

5 to 9 are structural diagrams of an anode side bipolar plate and a cathode manifold formed on the cathode side bipolar plate constituting the first, second, third, fourth and fifth stack stages according to the present invention.

    <Description of the symbols for the main parts of the drawings>

1 stack assembly 2 anode side B / P (Bipolar Plate) block

3: cathode side B / P (Bipolar Plate) block

4,5,6,7,8: 1, 2, 3, 4, 5 stack stages

9: Dummy Bipolar Plate

10,11,12,13,14: 1, 2, 3, 4, 5 anode side B / P (Bipolar Plate)

10 ', 11', 12 ', 13', 14 ': B / P (Bipolar Plate) on the 1st, 2, 3, 4, 5 cathode side

15a, 15b, 15c, 15d, 15e: anode-in channel

15aa, 15bb, 15cc, 15dd, 15ee: anode-out channel

16a, 16b, 16c, 16d, and 16e: cathode-in channel

16aa, 16bb, 16cc, 16dd, 16ee: cathode-out channel

A: Universal Bipolar Plate

B: Manifolder Field Channel

C: Flow Field Channel

D, E: Anode-in-out manifold

F, G: Cathode-in-out manifold

ha: main in channel hb, hc, hd, he: 1, 2, 3, 4 sub in channel

Ha: main out channel Hb, Hc, Hd, He: 1, 2, 3, 4 sub out channel

I, J: Left and right sub manifolds

Ka, Kb: Water-in-out anode manifold

Pa, Pb: Water-in-out cathode manifold

Qa, Qb: Left and right Coolant channels

Claims (20)

A bipolar plate (Bipolar plate) is placed on both sides of a membrane-electrode assembly (MEA) made of a polymer electrolyte membrane so as to generate electricity through chemical reaction through supplied fuel (hydrogen) and air (oxygen). In the stack assembly is added to form a unit cell, the unit cells are stacked in multiple stages, Form an anode-in manifold (D) that forms a fuel (hydrogen) inlet anode at one top edge, and process it in the flow field channel (C) except at both sides at the bottom edge of the opposite side. Connected fuel flow channels are connected to form an anode-out manifold (E) which forms a fuel (hydrogen) exhaust anode. The cathode-in manifold (D) forms a cathode-in manifold (F) forming an air (oxygen) inflow cathode (cathode) to the upper edge portion of the upper side opposite the upper side, and the opposite side lower edge portion A cathode-out manifold (G) is formed to be connected to an air flow channel processed independently of the flow field channel (C) to form an air (oxygen) discharge cathode. The anode in-out manifold (D, E) and the cathode in-out manifold (F, G) are based on the main in channel (ha, Ha) forming a main inflow / outflow passage, and the main in As a plurality of sub-in and out channels forming the auxiliary passages while being spaced or joined to the side peripheral regions of the channels ha and Ha are formed, the inflow and discharge passage shapes are changed to form a variable shape end. To the side space in which the cathode-in manifold F and the anode-out manifold E are not formed, and the side space in which the anode-in manifold D and the cathode-out manifold G are not formed. Inflow is connected to the water and the coolant flow channel independently processed in the flow field channel (C) to discharge the water (Water) generated by the chemical reaction, and to prevent the accumulation of heat generated Left and right sub manifolds (I, J), which are discharge passages, are processed, Bipolar plate of the stack assembly characterized in that. 2. The stack assembly of claim 1, wherein the anode-out manifold E and the cathode-out manifold G face downward of the stack assembly 1 with the stack assembly 1 placed therein. Bipolar plate. The method of claim 1, wherein the anode in manifold (D) and the cathode in manifold (F) is based on the main in channel (ha) processed to form a main inlet passage, The first and second sub-in channels hb and hc are formed to be paired with a spaced apart from each other at an upper side, The bipolar plate of the stack assembly, characterized in that the third · fourth sub-in channel (hd, he) is formed in a pair spaced apart from each other in a side of the side of the main in channel (ha). 4. The bipolar plate of claim 3 wherein the third and fourth sub in channels (hd, he) are positioned outward of the bipolar plate. The method of claim 1, wherein the anode-out manifold (E) and the cathode-out manifold (G) is based on the main in channel (Ha) processed to form a main inlet passage, so that the main in channel (Ha) The first sub out channel Hb is formed at a side spaced apart from one side, The bipolar plate of the stack assembly, characterized in that the second · 3 · 4 sub out channel (Hc, Hd, He) is formed in a pair spaced apart from each other at the lower side of the main in channel (Ha) . 6. The bipolar plate of claim 5 wherein the first sub out channel (Hb) is located outward of the bipolar plate. The anode-in manifold according to claim 1, wherein an inflow passage for forming the left and right sub manifolds I and J to separate water generated by a chemical reaction from outside the stack assembly 1 is an anode-in manifold. A right water-in cathode manifold (Pa) and a left water-in anode manifold (Ka), which are respectively located on the side of (D) and the cathode-in manifold (F), are formed, The left water-out cathode manifold, inlet and discharge through the processed flow channel independently of the flow field channel (C), is located on the anode-out manifold (E) and cathode-out manifold (G) sides, respectively. A bipolar plate of a stack assembly, characterized in that a folder (Pb) and a right water-out anode manifold (Kb) are formed. The method according to claim 7, wherein the right water-in cathode manifold (Pa) is connected to the left water-out cathode manifold (Pb), the left water-in anode manifold (Ka) is the right water-out anode manifold ( Bipolar plate of the stack assembly characterized in that it is connected toward Kb). The bipolar plate of the stack assembly according to claim 8, wherein the water-in-out anode manifold (Ka, Kb) and the water-in-out cathode manifold (Pa, Pb) are processed in the same shape. The flow path according to claim 7, wherein the left and right sub-manifolds (I, J) form a flow passage for circulating coolant to prevent internal heat accumulation. The left coolant channel Qa formed between the water-in cathode manifold Pa and the water-out anode manifold Kb, and the water-in anode manifold Ka and the water-out cathode manifold And a right coolant channel (Qb) formed spaced apart between Pb), and the left and right coolant channels (Qa, Qb) are processed in the same shape. The anode-out-out manifold (D, E), the left-right sub-manifold (I, J), and the cathode-in-out manifold (F, G) are gaskets. Bipolar plate of the stack assembly, characterized in that the airtight treatment. The bipolar plate of claim 11, wherein the gasket is formed of an elastic silicone-based or fluorine-based material. Based on the main in and out channels (ha, Ha) that constitute the main inlet and outlet passages, a plurality of secondary passages are formed to be spaced apart or merged into the peripheral area of the side of the main in and out channels (ha, Ha). A variable end consisting of sub in and out channels (hb, hc, hd, he, Hb, Hc, Hd, He) has an anode-in manifold (D) and air, which are fuel (hydrogen) inlets, at both upper corners, respectively. A cathode-in manifold (F), which is an (oxygen) inlet, is formed, and an anode-out manifold (E), which is a fuel (hydrogen) outlet, and a cathode, which is an air (oxygen) outlet, so as to cross each other at both bottom edges. Forms an manifold (F), The anode-in-out manifolds (D, E) and the cathode-in-out manifolds (F, G) are formed in the side spaces for discharging water due to chemical reactions and preventing heat accumulation. A general-purpose bipolar plate A in which left and right sub-manifolds I and J, which are passages for circulating coolant, are processed; The general purpose bipolar plate (A) is padded so as to form an anode side B / P block (2, Bipolar Plate Block) supplied with fuel to one side of a membrane-electrode assembly (MEA) made of a polymer electrolyte membrane. A unit cell which is formed so as to form a cathode-side B / P block (3, Bipolar Plate Block) to which air (oxygen) is supplied and constitutes one basic unit; The unit cells are continuously stacked to form a plurality of stages connected to each other, and a dummy B / P (9, dummy bipolar plate) in which a manifold and a flow channel are selectively processed is disposed between the stages. A stack stage forming an independent section for each stage; Cascade type stack assembly of the fuel cell device, characterized in that it is constructed as. The stack stage according to claim 13, wherein the stack stage is constructed of first, second, third, fourth, and fifth stack stages (4, 5, 6, 7, and 8) partitioned by a dummy B / P (9). 2, 3, 4, 5 stack stages (4, 5, 6, 7, and 8) are located on one side of the membrane-electrode assembly to form a variable stage, which is a passage for introducing and discharging fuel (hydrogen). 2, 3, 4, 5 anode-side B / Ps (10, 11, 12, 13, 14) and variable shape stages, which are located on opposite sides of the membrane-electrode assembly and are passages for introducing and discharging air (oxygen) A plurality of unit cells formed of the first, second, third, fourth and fifth cathode side B / Ps (10 ', 11', 12 ', 13', 14 ') having the same structure   The first, second, third, and fourth anode side B / Ps (10,11,12,13,14) and the first, second, third, and fourth cathode side B / Ps (10 ', 11', 12 ', 13', and 14 ', the inflow passage variable end is a pair of first and second subs which are spaced apart from each other and spaced apart from the main in channel ha on the upper side with respect to the main in channel ha. In-channel (hb, hc) and a pair of third and fourth sub-in channels (hd, he) spaced apart from each other and spaced apart from the main in channel (ha) on one side of the main in channel (ha) And an anode cathode in manifold (D, F) which forms the anode cathode in channels 15a, 15b, 15c, 15d, 15e, 16a, 16b, 16c, 16d, and 16e, respectively. The discharge passage variable end may include a first sub out channel Hb spaced apart from the main in channel ha on one side of the main out channel Ha, and a main in on the bottom side of the main out channel Ha. Anode cathode-out channels 15aa, 15bb, 15cc, 15dd, using a pair of second, third and fourth sub out channels Hc, Hd and He spaced apart from each other and separated from the channel Ha 15ee, 16aa, 16bb, 16cc, 16dd, 16ee), each of which consists of an anode cathode-out manifold (E, G), The left and right sub-manifolds I and J formed between the anode-in-out manifolds D and E and the cathode-in-out manifolds F and G are formed by a chemical reaction. ), The water-in-out anode manifolds Ka and Kb for evaporating outside the stack assembly 1 are provided with the cathode-in channels 16a, 16b, 16c, 16d, 16e and the anode-out channels 15aa, 15bb, 15cc, 15dd, 15ee), with the left coolant channel Qa for coolant flow being formed therein, The water-in-out cathode manifolds (Pa, Pb) are located between the space of the anode-in channels (15a, 15b, 15c, 15d, 15e) and the cathode-out channels (16aa, 16bb, 16cc, 16dd, 16ee). Among them, a cascade type stack assembly of a fuel cell device, characterized in that a right coolant channel (Qb) for coolant flow is formed. The water-in-out anode manifolds Ka and Kb, the water-in and out cathode manifolds Pa and Pb, and the left and right coolant channels Qa and Qb, respectively. 1, 2, 3, 4, 5 anode side B / Ps (10, 11, 12, 13, 14) constituting the 2, 3, 4, 5 stack stages (4, 5, 6, 7, and 8) And the first, second, third, fourth and fifth cathode side B / Ps 10 ', 11', 12 ', 13', and 14 'are all machined in the same shape. Stack assembly. The anode-in channel 15a formed in the first anode side B / P 10 and the first cathode side B / P 10 'of the first stack stage 4 is a main in channel (15a). ha) is formed by processing the first and second sub-in channels (hb, hc) connected to each other on the upper side, and the cathode-in channel (16a) is the main in with the main in channel (ha) is processed The fourth sub-in channel he formed on one side of the channel ha is processed by being spaced apart, The anode-out channel 15aa processes the first sub out channel Hb independently while being spaced apart from one side of the main out channel Ha, and simultaneously processed to the lower side of the main out channel Ha. The second, third, and fourth sub out channels Hc, Hd, and He are processed and formed to be integrally connected to the main out channel Ha, and the cathode-out channel 16aa is connected to the main out channel Ha. A cascade type stack assembly of a fuel cell device, characterized in that the first, second, third, and fourth sub-out channels (Hb, Hc, Hd, He) formed on the side surface are connected to each other and formed into a space. The anode-in channel 15b formed in the second anode side B / P 11 and the second cathode side B / P 11 'of the second stack stage 5 is a main in channel (15b). On one side of ha), the fourth sub-in channel he is formed to be connected to each other, and the cathode-in channel 16b is formed of the main in-channel ha while the main in-channel ha is processed. The fourth sub in channel (he) formed on one side is formed by processing in the spaced apart state, The anode-out channel 15bb is formed by processing the main out channel Ha and the first and fourth sub out channels Hb and He to be connected, and the cathode-out channel 16bb is connected to the main out channel Ha. A cascade stack assembly of a fuel cell device, characterized in that the first, second, third, and fourth sub-out channels (Hb, Hc, Hd, He) formed on the side thereof are connected to each other to be processed into one space. 15. The anode-in channel 15c formed in the third anode side B / P 12 and the third cathode side B / P 12 ′ of the third stack stage 6 is a main in channel (15c). In the state where ha) is processed, the upper first sub in channel hb is connected to each other, and the processed fourth sub in channel he is spaced apart from one side of the main in channel ha. The cathode-in channel 16c is formed by processing the fourth sub-in channel he formed on one side of the main in channel ha while being spaced apart from the main in channel ha. , The anode-out channel 15cc is formed by processing the main out channel Ha to be connected to the fourth sub-out channel He, and the cathode-out channel 16cc is formed on the main out channel Ha and the side thereof. A cascade type stack assembly of a fuel cell device, wherein the first, second, third, and fourth sub-out channels (Hb, Hc, Hd, He) are connected to each other and formed into a space. 15. The anode-in channel 15d formed in the fourth anode side B / P 13 and the fourth cathode side B / P 14 ′ of the fourth stack stage 7 is a main in channel (15d). In the state where ha) is processed, the upper first sub in channel hb is connected to each other, and the processed fourth sub in channel he is spaced apart from one side of the main in channel ha. The cathode-in channel 16d is formed by processing the main in-channel ha and the fourth sub-in channel he on one side thereof. The anode-out channel 15dd is formed by processing the main out channel Ha to be connected with the fourth sub out channel He, and the cathode-out channel 16dd is formed with the main out channel Ha and the fourth sub out. Cascade type stack assembly of a fuel cell device, characterized in that formed by processing to connect the channel (He). 15. The anode-in channel 15e formed in the fifth anode side B / P 14 and the fifth cathode side B / P 14 'of the fifth stack stage 8 is a main in channel (15e). In the state where ha) is processed, the upper first sub in channel hb is connected to each other, and the processed fourth sub in channel he is spaced apart from one side of the main in channel ha. The cathode-in channel 16e is formed by processing the main in channel ha and the first and second sub-in channels hb and hc processed at the upper side thereof, and are connected to each other. The anode-out channel 15ee is formed by processing the main out channel Ha to be connected to the fourth sub-out channel He, and the cathode-out channel 16ee is formed at the main out channel Ha and the lower side thereof. In addition to forming the second, third and fourth sub out channels Hc, Hd, and He, the first sub out channel Hb is formed so as not to be spaced apart from one side of the main out channel Ha. A cascade stack assembly of a fuel cell device, characterized in that it is formed by processing.

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