KR20180117403A - Flow frame and secondary vattery comprising the same - Google Patents

Abstract

The present invention relates to a flow frame structure and a secondary battery including the same. More specifically, the present invention relates to a flow frame structure and a secondary battery including the same, which divide a carbon felt included in a cell structure into two or more, place in an electrolyte flow direction of a flow frame, and form a passage so that an electrolyte can be simultaneously introduced into each carbon felt. Therefore, a differential pressure due to a supply of the electrolyte decreases when driving a cell. The flow frame structure comprises: a carbon felt layer; and a plate forming a carbon felt layer insertion groove into which the carbon felt is inserted.

Description

[0001] FLOW FRAME AND SECONDARY VATER COMPRISING THE SAME [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow frame structure and a secondary battery including the flow frame structure. More particularly, the present invention relates to a flow frame structure, To a flow frame structure in which a differential pressure due to the supply of an electrolyte during cell driving is reduced, and a secondary battery including the flow frame structure.

Recently, as energy resources such as oil and coal are expected to be depleted, there is a growing need for energy to replace them. Interest in fuel cells, metal secondary batteries, and flow batteries is growing as one of the alternative energy sources.

Fuel cells are energy conversion devices that convert the chemical energy of a fuel directly into electrical energy. That is, a fuel cell uses a fuel gas and an oxidizing agent, and generates electricity using electrons generated during the oxidation-reduction reaction. The membrane electrode assembly (MEA) of a fuel cell is composed of a cathode, an anode, and an electrolyte membrane, that is, an ion conductive electrolyte membrane, as a portion where an electrochemical reaction between hydrogen and oxygen occurs.

Redox Flow Battery (Redox Flow Battery) is an electrochemical storage device that stores the chemical energy of an active material directly as electrical energy by a system in which an active substance contained in an electrolyte is redoxed and discharged by charging and discharging. The unit cell of the redox flow battery includes an electrode, an electrolyte, and an ion exchange membrane (electrolyte membrane).

The existing redox flow battery uses a carbon felt, which has a large electrode active area and thus has a high transfer rate. However, the electrolytic solution spreads evenly over the carbon felt electrode as a whole, There is a problem of pressure drop phenomenon and a certain active electrolyte transfer.

As a method for improving this, a method of forming a flow path in a bipolar plate and using a carbon paper electrode instead of carbon felt in a fuel cell to reduce the pressure strengthening phenomenon and maintain the mass transfer rate, However, this method has a disadvantage that the carbon paper is used, and when the carbon felt is used, the flow path formed on the bipolar plate is blocked by the carbon felt while the advantageous effect of the flow path is canceled have. Therefore, there is a problem that a carbon felt electrode having a wide electrode active area can not be utilized.

Accordingly, the present inventor has developed a flow frame and a secondary battery with reduced pressure drop phenomenon and improved differential pressure by utilizing a carbon felt electrode.

Korean Patent Publication No. 10-1661570

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a method and apparatus for preventing leakage due to a high cell differential pressure, And a secondary battery including the frame structure.

It is another object of the present invention to provide a flow frame structure in which system efficiency is increased by maintaining a supply speed of an electrolyte and preventing a load from being increased on a pump, and a secondary battery including the flow frame structure.

A flow frame structure according to the present invention comprises a carbon felt layer; And a plate having an insertion groove into which the carbon felt is inserted, wherein the carbon felt layer and the insertion groove are formed of two or more carbon felt.

According to one embodiment, the carbon felt is provided in the same size.

According to one embodiment, the two or more carbon felts are provided in a vertically symmetrical manner.

According to one embodiment, the two or more carbon felts are provided in a vertically symmetrical manner.

According to one embodiment, the insertion groove is formed on one or both surfaces of the flow frame.

According to one embodiment, the plate includes a channel for supplying and discharging an electrolyte solution to the carbon felt layer.

According to an embodiment of the present invention, the plate includes a mixing portion for mixing an electrolyte supplied to and discharged from the carbon felt to one side of the insertion groove.

According to one embodiment, the flow path includes: a supply path for supplying an electrolyte solution to the carbon felt; And a discharge duct for discharging the electrolytic solution passing through the carbon felt.

According to an embodiment of the present invention, the supply passage and the discharge passage are located on the carbon felt opposite to the upper side, the lower side, the right side, and the left side.

A secondary battery according to the present invention includes: a first end plate; A first mono polar plate positioned on one side of the first end plate; A second mono polar plate positioned in a direction opposite to the first mono polar plate; An ion exchange membrane positioned between the first monopolar plate and the second monopolar plate; And a second end plate located on one side of the second mono-polar plate and facing the first end plate, wherein at least one of the first and second mono- And the flow frame structure according to any one of claims 1 to 11.

According to an embodiment, the secondary battery may further include at least one bipolar plate between the first and second monopolar plates, wherein at least one of the at least one bipolar plate is the electrode structure.

According to one embodiment, the secondary battery is any one of a lithium secondary battery, a flow battery, and a redox flow battery.

The flow frame structure and the redox flow battery in the present invention have two or more carbon felt having a short length, thereby reducing the flow resistance of the electrolyte solution and reducing the differential pressure caused by the flow resistance, thereby preventing leakage of the electrolyte solution . Further, the load of the electrolyte pump can be reduced, and the power consumption can be lowered, resulting in the effect of saving energy.

1 is an exploded perspective view of a flow frame structure according to an embodiment of the present invention.
2 is a front view showing a flow frame according to an embodiment of the present invention.
3 is an exploded perspective view of a flow frame structure according to another embodiment of the present invention.
4 is an exploded perspective view of a secondary battery according to an embodiment of the present invention.
5 is an exploded perspective view of a secondary battery according to another embodiment of the present invention.
FIG. 6 is a graph showing the measurement results of the electrolytic solution flow rate in Experimental Example 1. FIG.
7 is a front view showing a flow frame to which the laminar flow model of the first embodiment is applied, and FIG. 7 (b) is a front view showing a flow frame to which the laminar flow model of the second embodiment is applied.

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a detailed description of known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted. The embodiments of the present invention are provided to fully explain the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

Hereinafter, preferred embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are provided only for the better understanding of the present invention, and the present invention is not limited by the examples.

< Flow Frame Structure >

FIG. 1 is an exploded perspective view of a flow frame structure 10 according to an embodiment of the present invention, FIG. 2 is a front view showing a plate 12 according to an embodiment of the present invention, and FIG. Is an exploded perspective view of a flow frame structure 10 'according to an example.

The flow frame structure 10 according to an embodiment of the present invention may include a carbon felt layer 11 and a plate 12. [

The carbon felt layer 11 is an electrode part generally used for a secondary battery, and may be located on one surface of a plate 12 described later. The carbon felt layer 11 according to an embodiment of the present invention may be composed of two or more carbon felt. The two or more carbon felts may be arranged along the longitudinal direction of the plate 12, and may be arranged vertically symmetrically or asymmetrically. In one embodiment, the carbon felt is preferably arranged vertically symmetrically. That is, two or more carbon felts may be arranged in the direction perpendicular to the plane of the plate 12. [ For example, when the carbon felt layer 11 is provided with two carbon felts and the upper and lower carbon felts are arranged on the basis of an arbitrary line formed in the center in the horizontal direction with respect to the longitudinal direction of the plate 12 Can be arranged in the same position, size and shape.

3, the carbon felt layer 11 composed of three carbon felts can be arranged such that three carbon felts are opposed to each other in the longitudinal direction of the plate 12. [ Here, the three carbon felts may be arranged vertically symmetrically or asymmetrically. In one embodiment, the three carbon felts can be biased to the left or the right depending on the positions of the flow paths 3 and 4 formed.

L is the length of the carbon felt, A is the internal cross-sectional area of the carbon felt through which the electrolyte flows, k is the permeability of the carbon felt,

Referring to Equation 1, it can be seen that the differential pressure is proportional to the length and flow rate of the carbon felt, and inversely proportional to the internal cross-sectional area of the carbon felt through which the electrolyte flows.

Therefore, when one carbon felt layer included in the conventional cell structure is arranged along the longitudinal direction of the plate 12 divided into two or more carbon felts like the carbon felt layer 11 according to the present invention, the length of the carbon felt is short The width of the carbon felt through which the electrolytic solution flows or the internal cross-sectional area of the carbon felt through which the electrolytic solution flows doubles, so that the cell differential pressure can be reduced. That is, since the flow resistance of the electrolyte is reduced, the supply speed of the electrolyte can be maintained, and the load of the pump can be minimized, thereby reducing energy consumption.

The carbon felt layer 11 according to the present invention may include a metal coated with a carbon-based material, a metal or a carbon-based material in addition to the carbon felt.

The carbonaceous material may be carbon paper, carbon cloth, and carbon fiber, but is not limited thereto, so long as it is a material commonly used in the art.

The metal is not limited as long as it is a conductive metal material, but may specifically include a single metal such as tungsten, zirconium, titanium, or two or more metal alloys. The metal may be preferably a metal having excellent chemical resistance.

The carbon-based material may be selected from the group consisting of graphite, carbon black, acetylene black, denka black, canola black, activated carbon, mesoporous carbon, carbon And may be one or a mixture of two or more selected from the group consisting of nanotubes, carbon nanofibers, carbon nanofines, carbon nanorings, carbon nanowires, fullerenes and superpots.

The plate 12 may serve to insert the carbon felt layer 11 on one side or both sides of the PVC sheet 1 and may have a shape in which a graphite sheet (not shown) is adhered to the PVC sheet 1, The graphite plate may be provided in any one of the separated forms. Note that in the latter case, a gasket (not shown) may be added between the PVC sheet 1 and the graphite sheet.

In one embodiment, the flow frame 10 can be provided by integrally adhering the PVC sheet 1 and the graphite sheet with an adhesive. Here, the PVC plate 1 may be formed with an insertion groove 2 into which a carbon felt can be inserted and a flow passage 3, 4 through which an electrolyte can be supplied and discharged.

In another embodiment, the flow frame 10 may be formed of two PVC sheets 1 and a graphite sheet. The two PVC sheets 1 may include a PVC sheet 1 on which a flow path is formed and a PVC sheet 1 on which two or three insertion grooves 2 are formed. It should be noted that the graphite plate may be positioned between two PVC plates 1, wherein the graphite plate provides an area larger than the area where two or three insertion grooves 2 are formed.

The insertion groove 2 of the flow frame 10 according to one embodiment and another embodiment may be provided on one or both sides of the PVC plate 1 and two or three insertion grooves 2 may be formed, (2) may be spaced apart from each other by a predetermined distance.

In the conventional flow frame, the flow path is formed in the carbon felt or the carbon paper in order to reduce the pressure drop phenomenon and maintain the mass transfer speed, but the carbon felt or the carbon paper is pressed by the pressure during the production of the secondary battery, . However, the flow frame 10 according to the present invention can prevent the flow path from being clogged by the carbon felt or the carbon felt layer 11 when the secondary battery is fastened by forming the flow path on the PVC plate 1, The flow resistance of the electrolyte can be reduced, and the effect of maintaining the electrolyte supply rate and mass transfer rate can be obtained.

In addition, the plate 12 may include a mixing portion (not shown) for mixing the electrolytic solution supplied to and discharged from the carbon felt layer 11. Specifically, the mixing portion may serve to supply the electrolytic solution supplied from the supply passage in the width direction of the carbon felt, and may be positioned in a direction facing the upper side, the lower side, the right side, and the left side of the insertion groove 2.

The plate 12 may be applied to either the monopolar plate or the bipolar plate. Here, the monopolar plate may mean a case where the carbon felt layer 11 is inserted only on one side of the plate 12, and the bipolar plate means the case where the carbon felt layer 11 is inserted on both sides of the plate 12 can do.

In the case of the monopolar plate, a flow path for supplying and discharging the electrolyte solution to the carbon felt layer 11 may be formed. The flow path formed in the monopolar plate may include the supply flow path 3 and the discharge flow path 4. Specifically, one inlet manifold 5 and one outlet manifold 6 may be formed in the monopolar plate, and the electrolytic solution supplied to the inlet manifold 5 may be distributed and supplied to the upper carbon felt and the lower carbon felt And a discharge passage 4 for discharging the electrolyte solution that has passed through the supply passage 3 and the upper and lower carbon felts to the outlet manifold 6. Accordingly, the supply passage 3 may be formed by separating the upper and lower carbon felt from the inlet manifold 5, and the discharge passage 4 may be formed by combining the upper and lower carbon felt with the outlet manifold 6 Lt; / RTI &gt; The inlet manifold 5 and the outlet manifold 6 may be formed in a diagonal direction and the supply passage 3 and the discharge passage 4 may be formed on the upper side, the lower side, the right side, Can be positioned in opposite directions.

<Secondary Battery>

4 is an exploded perspective view of a secondary battery 100 according to an embodiment of the present invention. A secondary battery 100 according to an embodiment of the present invention includes a first end plate 70, a first current collector 50, a first mono polar plate 20, a second mono polar plate 30, A first current collector 40, a second current collector 60, and a second end plate 80. Here, any one of the first monopolar plate 20 and the second monopolar plate 30 may be the above-described flow frame structure. That is, any one of the first mono polar plate 20 and the second mono polar plate 30 may be the flow frame structure 10 or 10 'described above, or the first mono polar plate 20 and the second mono- (30) may be the above-described flow frame structures 10 and 10 ', respectively.

At this time, the carbon felt layer 11 included in the first mono polar plate 20 and the second mono polar plate 30 may be any one of an anode and a cathode. For example, 1 monopolar plate 20 is an anode, the second monopolar plate 30 may be a cathode. An anode electrolytic solution may be supplied to the first mono polar plate 20, and a cathode electrolytic solution may be supplied to the second mono polar plate 30. Here, a manifold may be formed at four corners of the first monopolar plate 20 and the second monopolar plate 30. When the inlet manifold of the first monopolar plate 20 is the lower right corner, 2 monopolar plate 30 may be formed at the lower left corner.

5, a secondary battery 100 'according to another embodiment of the present invention may further include one or more bipolar plates 90 between the first and second monopolar plates 20 and 30 . Here, the bipolar plate 90 may be the flow frame structure 10, 10 'described above.

Bipolar plates 90 are conductive plates separating each cell from the fuel cell stack and are often referred to as separators. The bipolar plate 90 can serve as a fuel electrode plate and an air electrode plate, and can function to shut off the fuel gas and air, to secure the flow path of the fuel gas and air, and to transmit the current to the external circuit. Therefore, low gas permeability is required along with high electrical conductivity, corrosion resistance, thermal conductivity.

In one embodiment, the bipolar plate 90 may be made of graphite, a carbon composite material, or a metal material. The graphite may be graphite impregnated with a resin. Examples of the metal material include stainless steel, aluminum, titanium, can do. For example, the bipolar plate 90 may be formed by forming a flow channel through machining on a substrate made of a conductive material such as a graphite plate or a metal plate, or by forming a graphite composite material or a metal plate, Thereby forming a bipolar plate. At this time, the flow path formed in the bipolar plate 90 may be formed with a predetermined depth groove or may be formed as a through hole.

The bipolar plate 90 may serve to distribute the heat generated in the battery to the entire stack of the secondary battery 100 ', and excessively generated heat may be recovered through an air-cooled or water-cooled heat exchange, have.

In the bipolar plate 90 according to the present invention, the PVC plate 1 may have an insertion groove 2 and a flow path formed on both sides thereof.

In the secondary battery 100 'according to another embodiment of the present invention, the bipolar plate 90 between the first and second monopolar plates 20 and 30 is positioned, And between the plate 20 and the bipolar plate 90 and between the second monopolar plate 30 and the bipolar plate 90, respectively.

In the present embodiment, the secondary batteries 100 and 100 'may be any one of a lithium secondary battery, a flow battery, and a redox flow battery.

In one embodiment, the redox flow battery may be manufactured according to a conventional method known in the art, except that it includes the secondary battery 100, 100 'structure according to the present invention.

In general, the redox flow battery includes an anode electrolyte storage portion for inserting and storing the cathode electrolyte supplied to the anode, and a cathode electrolyte storage portion for inserting and storing the cathode electrolyte supplied to the cathode, in addition to the structure of the secondary batteries 100 and 100 ' .

At this time, the anode electrolyte stored in the anode electrolyte storage part is transferred to the anode through the anode electrolyte inlet port through the pump, and then, when the redox reaction is completed, the anode electrolyte solution is again transferred to the anode electrolyte storage part through the anode electrolyte outlet. Similarly, the cathode electrolytic solution stored in the cathode electrolytic solution storage part is transferred to the cathode through the cathode electrolytic solution inlet port through the pump, and then moved to the cathode electrolytic solution storage part through the cathode electrolytic solution outlet when the redox reaction is completed.

The redox flow battery may also include an inlet port and an outlet port. Specifically, the inlet port is connected to the first or second end plate (70, 80) through an electrolyte inlet from which electrolyte flows from the electrolyte reservoir and an inlet manifold (5) of the first or second mono polar plate (20, 30) As shown in FIG. Similarly, the outlet port is connected to the first or second end plates 70 and 80 through a discharge port through which the redox reaction is completed and an outlet manifold 6 of the first or second monopolar plate 20 or 30, As shown in FIG.

&Lt; Example 1 >

Two carbon felts of Toyobo Co. were inserted into the flow frame. The size of the carbon felt was 16.25 cm in width and 10 cm in length (162.5 cm ^{2 in} cross section), and Nafion of DuPont was inserted as a separator.

&Lt; Example 2 >

Three carbon felts of Toyobo Co. were inserted into the flow frame. The carbon felt was 16.25 cm in width and 6.67 cm in length (108.4 cm ^{2 in} cross section), and Nafion of DuPont was inserted as a separator.

&Lt; Comparative Example 1 &

And a carbon felt having a width of 16.25 cm and a length of 20 cm (sectional area of 325 cm ² ).

<Experimental Example 1>

Electrolyte flow measurement

16.25 * 20㎝ (cross-sectional area 325㎝ ²⁾ 1 carbon felt of the unit cells including a plate is inserted into grooves formed in the size and width 16.25㎝ 20㎝ length (cross-sectional area 325㎝ ²⁾ and one width and length 16.25㎝ 10㎝ ( Sectional area of 162.5 cm &lt; ² &gt;) was inserted, and then the flow rate of the electrolytic solution was measured according to the Hz of the pump. The pump inverter frequency was increased from 35 Hz to 60 Hz by 5 Hz in the single cell, and the electrolyte flow rate per step was shown in Table 1 below.

Hz 325 cm ² 162.5 cm ² 0 cm ² Full (W-16.25, H-20 cm) Half (W-16.25, H-10 cm) Non-CF Total (cc) ccm / cm ² Total (cc) ccm / cm ² Total (cc) 60 320 0.98 416 2.55 840 55 270 0.83 340 2.09 720 50 220 0.68 264 1.62 570 45 180 0.55 206 1.26 510 40 130 0.40 160 0.98 420 35 95 0.29 122 0.75 320

16.25㎝ width and length 10㎝ (cross-sectional area 162.5㎝ ²⁾ when inserted one carbon felt, a pump, but the inverter frequency 60Hz viewed maximum flow rate of 416cc / min, the width and length 16.25㎝ 20㎝ (cross-sectional area 325㎝ ² ) Carbon felt was mounted, it was confirmed that 320cc / min at 60 Hz. It can be seen that the shorter the length of the carbon felt, the lower the electrolyte flow resistance. It was also confirmed that the flow rate of the electrolytic solution (non-CF) without the carbon felt inserted was about twice that of one carbon felt having a width of 16.25 cm and a length of 6.67 cm (a cross-sectional area of 108.4 cm ² ). From these results, a significant portion of the flow resistance is caused by the porous medium, i.e. carbon felt.

<Experimental Example 2>

Electrolyte flow measurement

An electrolytic solution was supplied to the unit cell in which the above-mentioned Example 1, Example 2 and Comparative Example 1 were inserted, and an average flow rate was measured.

6, the flow rate of 0.65 cc / min * cm ² per unit area (cm ² ) was confirmed in Comparative Example 1 under the condition of the pump inverter frequency of 50 Hz. In Example 1, the flow rate was 3.51 cc / min * Cm &lt; ^{2 &} gt ;. It can be seen that the electrolyte flow rate increased about 5.4 times as the length of the carbon felt decreased by half. In Example 2, it was confirmed that the flow rate increased to 5.17 cc / min * cm ² under the same conditions. As the length of the carbon felt decreases to about 1/3, the flow rate of the electrolytic solution increases by about 8 times.

That is, it can be seen that the length of the carbon felt is reduced, and the cross-sectional area of the total carbon felt through which the electrolytic solution flows increases by two times and three times, thereby increasing the flow rate.

<Experimental Example 3>

Battery performance measurement

1 L of a commercial electrolytic solution of OXKEM was circulated to each of the electrodes prepared in Example 1 and Comparative Example 1, and the charge and discharge proceeded in a constant current mode in the range of 0.8 to 1.6 V . At this time, sikyeotgo charge and discharge speed is increased by 50mA / cm ² to 300 mA / cm ² eseo 50mA / ^{cm. 2,} the flow advances three times each step charging and discharging, per shown for the third performance of the charge-discharge cycles in Table 2.

Charge / discharge current density
(mA / cm ^2, constant current) Comparative Example 1 Example 1 Discharge
Volume
(mAh) electric current
efficiency
(%) Voltage
efficiency
(%) energy
efficiency
(%) Discharge
Volume
(mAh) electric current
efficiency
(%) Voltage
efficiency
(%) energy
efficiency
(%) 50 mA / cm ² 35165 91.6 91.8 84.1 35649 93.5 92.3 86.3 100 mA / cm ² 31288 94.9 84.7 80.3 32211 94.7 86.4 81.7 150 mA / cm ² 25498 96.2 77.7 74.7 27395 95.6 80.4 76.8 200 mA / cm ² 18160 96.9 70.5 68.3 21328 96.3 74.2 71.5 250 mA / cm ² 9808 97.9 62.5 61.2 14168 97.1 67.6 65.6 300 mA / cm ² Not measurable 6321 97.9 59.7 58.5

In comparison with Comparative Example 1, Comparative Example 1 had an electrolyte flow rate that was five times faster than that of Comparative Example 1, whereas Comparative Example 1 had no smooth charging and discharging at 300 mA / cm ² at high current (high output) Can be lowered to a certain extent, and as a result, there is no problem in charging and discharging, and it can be confirmed that the performance of the battery can be measured.

Also, 50mA / the current (output) Evaluation conditions of cm ² showed in Example 1 is 2.2% increased cell performance compared to Comparative Example 1, as compared to Comparative Example 1 at a current (output) Evaluation conditions of 250mA / cm ² conducted Example 1 shows an improved battery performance of 4.4%.

This means that when the current density increases, it is necessary to shorten the length of the carbon felt layer and increase the cross-sectional area in order to increase the electrolyte flow rate.

<Experimental Example 4>

Battery laminar flow measurement

7 (a) shows a flow frame to which the laminar flow model of the first embodiment is applied, and FIG. 7 (b) shows a flow frame to which the laminar flow model of the second embodiment is applied. The inlet manifold was divided into a manifold cross section at a flow rate of 325 ml / min at the inlet boundary condition, and the atmospheric pressure condition was provided at the outlet manifold boundary. The degree of freedom of flow frame flow analysis is 1,050,452, the analysis time is 972 seconds, and the used memory is about 18GB.

Table 3 shows the flow rate velocities of the supply passage A and the discharge passage B of Example 1 and Table 4 shows the flow rate velocities of the supply passages A,

Example 1 A B Flow rate (ml / min) 161.5 161.65

Example 2 A B C Flow rate (ml / min) 107.75 107.34 107.41

It can be confirmed that the velocity of the fluid branched in the upper manifold direction (-x direction) and the lower electrode direction (+ x direction) in the inlet manifold is the same in both directions. In addition, since the pressure at the branching points in both directions is also the same, the flow distribution in the direction of the upper and lower electrodes in the separated structure flow frame is expected to occur uniformly.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

100, 100 ': secondary battery
10, 10 ': Flow frame
11, 11 ': carbon felt layer
12, 12 ': plate
1: PVC plate
2: Insert groove
3: Supply flow
4: Emission channel
5: inlet manifold
6: outlet manifold
20: first monopolar plate
30: second monopolar plate
40: ion exchange membrane
50: The 1st collection
60: The 2nd Collection
70: first end plate
80: second end plate
90: bipolar plate

Claims (12)

Carbon felt layer; And
And a plate having a carbon felt layer insertion groove into which a carbon felt is inserted,
Characterized in that the carbon felt layer and the insertion groove are composed of two or more carbon felt.
Flow frame structure.
The method according to claim 1,
In the carbon felt,
Wherein the flow frame structure is provided with the same size.
The method according to claim 1,
The two or more carbon felts,
Wherein the flow frame structure is formed in a vertically symmetrical shape.
The method according to claim 1,
The two or more carbon felts,
Wherein the flow frame structure is provided in a vertically symmetrical manner.
The method according to claim 1,
The insertion groove
Wherein the flow frame structure is formed on one or both surfaces of the flow frame.
The method according to claim 1,
The plate may comprise:
And a flow path for supplying and discharging the electrolyte solution to the carbon felt layer.
The method according to claim 1,
The plate may comprise:
And a mixing portion for mixing an electrolyte supplied to and discharged from the carbon felt layer to one side of the insertion groove.
The method according to claim 6,
The flow path includes:
A supply passage for supplying an electrolytic solution to the carbon felt; And
And a discharge flow path for discharging the electrolytic solution passing through the carbon felt.
9. The method of claim 8,
Wherein the supply passage and the discharge passage are formed,
And is located in a direction opposite to the top, bottom, right, and left sides of the carbon felt.
A first end plate;
A first mono polar plate positioned on one side of the first end plate;
A second mono polar plate positioned in a direction opposite to the first mono polar plate;
An ion exchange membrane positioned between the first monopolar plate and the second monopolar plate; And
And a second end plate positioned on one surface of the second mono-polar plate and facing the first end plate,
Wherein at least one of the first and second monopolar plates is a flow frame structure according to any one of claims 1 to 9,
Secondary battery.
11. The method of claim 10,
The secondary battery includes:
Further comprising at least one bipolar plate between the first and second monopolar plates,
Wherein at least one of the at least one bipolar plate is the flow frame structure.
11. The method of claim 10,
The secondary battery includes:
A rechargeable battery, a lithium secondary battery, a flow battery, and a redox flow battery.

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