Electrochemical booster device

Abstract

The problem to be solved by the present invention is to prevent the path for fluid to flow into a predetermined position from being blocked, and the position is used to apply the pressure of the gas to the battery cell. In order to solve the above problem, the electrochemical booster device of the embodiment of the present invention comprises a first component and a second component, an elastic body, a fluid chamber, and a fluid path. The second component is opposite to the first component. The elastic body pushes the electrochemical cell by exerting elastic force in the direction of pushing the first component and the second component apart, and the supply gas of the electrochemical cell moves to the opposite side of the partition wall, that is, the solid polymer electrolyte membrane, due to electricity, so as to be high-pressured. The fluid chamber contains an elastomer and a high-pressure gas, and the pressure of the gas pushes the first component and the second component apart. The fluid path is formed on at least one of the first component and the second component, and the flow channel and the fluid chamber are connected to discharge the gas from the electrochemical cell. At least one of the first component and the second component introduces the gas into the inside in a manner that can use the pressure of the high-pressure gas to press the stack of the electrochemical cell.

Description

Technical Field

[0001] The invention relates to an electrochemical voltage boosting device. Background Art

[0002] As a method of making a gas such as hydrogen high-pressure, that is, increasing the pressure, in addition to mechanical compressors, there is also a method of compressing hydrogen by moving it electrochemically through a solid polymer electrolyte membrane. The battery cell converts the hydrogen supplied to the anode side electrode into hydrogen ions. The hydrogen ions move through the solid polymer electrolyte membrane and bond with electrons on the cathode side electrode to become hydrogen. That is, hydrogen moves to the other side of the solid polymer electrolyte membrane due to electricity. If the side after the movement is directly connected to a tank, for example, the gas has nowhere to go and is compressed to become high pressure. In order to increase the processing capacity of the gas movement, that is, the pressure increase speed, multiple battery cells are stacked.

[0003] In the method of using this battery cell, since the battery will try to expand due to the pressure of its own boost, a pushing force is applied in the stacking direction to counteract this situation, and stable electrolysis performance can be obtained. In general, the battery must be clamped more strongly than the high pressure state generated by itself. However, in the device for differential pressure water electrolysis, it is known that the piston structure transmits the pressure generated by itself to the pushing direction of the battery. The piston uses the elastic force of a disc spring, etc., and the pressure of the high-pressure hydrogen generated by the battery cell to push the battery cell. As a result, even if high-pressure gas is to be produced, there is no need to stack it using high loads such as pressing the battery with a higher high pressure, thereby suppressing the damage of various components.

[0004] [Prior Technical Literature]

[0005] (Patent Document)

[0006] Patent Document 1: Japanese Patent Application Publication No. 2015-113497 Summary of the invention

[0007] [Problems to be solved by the invention]

[0008] However, the piston shown in Patent Document 1 has a flow channel and space for high-pressure gas to flow, and is provided with a disc spring that generates elastic force. However, the disc spring space inside the piston is blocked by the disc spring and its contact surface, and the high-pressure gas cannot flow to the center of the disc spring. Since there are several spaces for accommodating disc springs inside the piston, the balance of the high-pressure gas inflow into each space is sometimes destroyed, that is, the load pushed by the piston is unevenly distributed, the load balance within the piston surface is destroyed, and the battery cell cannot be properly pushed.

[0009] An object of the present invention is to provide an electrochemical pressure boosting device that can prevent a path for a fluid to flow into a predetermined position for applying pressure of the fluid to a battery cell from being blocked.

[0010] [Technical means to solve the problem]

[0011] The piston in the electrochemical booster device of the embodiment comprises a first component, a second component, an elastic body, a fluid chamber and a first fluid path. The second component is opposite to the aforementioned first component. The elastic body pushes the electrochemical cell by exerting elastic force in the direction of pushing apart the aforementioned first component and the aforementioned second component, and the supply gas of the electrochemical cell moves to the opposite side of the partition wall, that is, the solid polymer electrolyte membrane, due to electricity, and is thus pressurized. The aforementioned elastomer and the pressurized gas are contained in the fluid chamber, and the pressure of the aforementioned pressurized gas is applied in the direction of pushing apart the aforementioned first component and the aforementioned second component. The first fluid path is formed on at least any one of the aforementioned first component and the aforementioned second component, and connects the flow channel for discharging the aforementioned pressurized gas from the aforementioned electrochemical cell and the aforementioned fluid chamber. At least any one of the aforementioned first component and the aforementioned second component is a component that introduces the aforementioned pressurized gas into the interior thereof in a manner that the pressure of the aforementioned pressurized gas can be used to press the stack of the aforementioned electrochemical cell.

[0012] (Effects of the Invention)

[0013] The embodiments of the present invention can prevent a path for a fluid to flow into a prescribed position for applying the pressure of a gas to a battery cell from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a side view showing an example of the appearance of the electrochemical hydrogen pressure boosting device according to the first embodiment.

[0015] Figure 2 It is shown Figure 1 An axial cross-sectional view of an example of a battery cell in FIG.

[0016] Figure 3 It is shown Figure 1 An axial cross-sectional view of an example of a piston portion in FIG.

[0017] Figure 4 yes Figure 3 The fixed parts in Figure 3 The AA line cross-sectional view is shown.

[0018] Figure 5 It is a cross-sectional view showing a modified example of the fixing member.

[0019] Figure 6 It is a cross-sectional view showing a modified example of the fixing member. DETAILED DESCRIPTION

[0020] Hereinafter, the electrochemical hydrogen boosting device of the embodiment will be described using the accompanying drawings. In addition, the scales of the various parts of the various drawings used in the following description of the embodiment are sometimes appropriately changed. In addition, for the sake of convenience of description, the various drawings used in the following description of the embodiment are sometimes drawn with the structure omitted. In addition, in the various drawings and this specification, the same symbol represents the same element.

[0021] Figure 1 FIG. 1 is a side view showing an example of the appearance of the electrochemical hydrogen pressure boosting device 100 according to the embodiment.

[0022] The electrochemical hydrogen pressure boosting device 100 is a device for boosting the pressure of hydrogen. As an example, the electrochemical hydrogen pressure boosting device 100 includes: a plurality of battery cells 110, a piston portion 120, a top plate 130a, a bottom plate 130b, a connecting rod 140, a high-pressure hydrogen outlet 150, two end plates 160 and two insulating plates 170. In addition, the electrochemical hydrogen pressure boosting device 100 is an example of an electrochemical pressure boosting device.

[0023] Figure 1 The battery cell 110, piston part 120, top plate 130a and bottom plate 130b are each roughly cylindrical in shape, but may also be other shapes such as square pillars. Bottom plate 130b, multiple battery cells 110, piston part 120 and top plate 130a are stacked in this order.

[0024] The battery cell 110 is a cell that electrochemically moves hydrogen to the opposite side of the electrolytic membrane. The hydrogen moved by the battery cell 110 is pressurized to a high pressure of, for example, about 1 MPa to 90 MPa. In addition, the battery cell 110 also adopts a similar structure in a fluid manufacturing device and a high-pressure device based on water electrolysis. In addition, the battery cell 110 will be described in more detail later. The battery cell 110 is an example of an electrochemical cell.

[0025] The piston part 120 pushes the battery cell 110. As an example, the piston part 120 is cylindrical. In addition, the piston part 120 will be described in more detail later.

[0026] The top plate 130a and the bottom plate 130b are cylindrical components, and are configured to sandwich the battery cell 110 and the piston portion 120 by the top plate 130a and the bottom plate 130b. In the description of this embodiment, one side of the top plate 130a is set as the upper side of the electrochemical hydrogen boosting device 100. And one side of the bottom plate 130b is set as the lower side of the electrochemical hydrogen boosting device 100.

[0027] The connecting rod 140 holds the bottom plate 130 b , the plurality of battery cells 110 , the piston portion 120 , and the top plate 130 a by clamping and fastening them.

[0028] The high-pressure hydrogen outlet 150 is a pipe for outleting the hydrogen pressurized by the electrochemical hydrogen pressure boosting device 100 to a hydrogen tank or the like outside the electrochemical hydrogen pressure boosting device 100 .

[0029] The electrochemical hydrogen pressure boosting device 100 includes two end plates 160 , namely an end plate 160 a and an end plate 160 b .

[0030] The end plates 160a and 160b sandwich a plurality of battery cells 110 from above and below. In addition, the end plates 160 have connection terminals connected to the external power source P. By disposing an insulating plate 170 on the surface of the end plate 160 opposite to the surface sandwiching the battery cells 110, leakage to the outside is prevented. The insulating plate 170 may be in the form of a coating or a film as long as it has insulating properties.

[0031] The electrochemical hydrogen pressure boosting device 100 includes two insulating plates 170 , namely an insulating plate 170 a and an insulating plate 170 b .

[0032] The insulating plates 170a and 170b are arranged so that the plurality of battery cells 110 and the two end plates 160 are sandwiched from above and below by the insulating plates 170a and 170b. The insulating plates 170 are arranged in contact with the end plates 160 to prevent leakage to the outside of the end plates 160. The insulating plates 170 are, for example, circular plates having insulating properties. Alternatively, the insulating plates 170 may be films or coatings having insulating properties.

[0033] use Figure 2 The battery unit 110 will be further described. Figure 2 FIG. 1 is an axial cross-sectional view showing an example of a battery cell 110 .

[0034] As an example, the battery cell 110 includes: an electrolyte membrane 111, a cathode side diaphragm 112a, an anode side diaphragm 112b, a cathode side power supply 113a, an anode side power supply 113b, a cathode side catalyst 114a, an anode side catalyst 114b, a normal-pressure hydrogen supply channel 115, a normal-pressure hydrogen flow channel 116, a normal-pressure hydrogen exhaust channel 117, a high-pressure hydrogen exhaust channel 118 and a high-pressure hydrogen flow channel 119.

[0035] The electrolyte membrane 111 is, for example, a solid polymer electrolyte membrane of a cation exchange type of perfluorosulfonic acid. The electrolyte membrane 111 is, for example, a circular membrane.

[0036] The cathode side diaphragm 112a and the anode side diaphragm 112b are stacked in a manner sandwiching the electrolyte membrane 111. The cathode side diaphragm 112a and the anode side diaphragm 112b are made of, for example, a carbon component. Alternatively, the cathode side diaphragm 112a and the anode side diaphragm 112b may be a steel plate, a stainless steel plate, a titanium plate, an aluminum plate, a plated steel plate, or a metal plate on which a surface treatment for corrosion prevention is applied on the metal surface. The shape of the cathode side diaphragm 112a and the anode side diaphragm 112b is, for example, a cylindrical shape.

[0037] The cathode-side separator 112 a is, for example, stacked on the upper side of the electrolyte membrane 111 .

[0038] The anode-side separator 112 b is stacked on the lower side of the electrolyte membrane 111 on the side opposite to the cathode side.

[0039] The cathode power supply 113a and the anode power supply 113b are, for example, made of a sintered body (porous conductor) of spherical atomized titanium powder. The cathode power supply 113a and the anode power supply 113b are, for example, provided with a smooth surface portion etched after grinding, and the porosity is set in the range of 10% to 46%, more preferably in the range of 20% to 40%. The shape of the cathode power supply 113a and the anode power supply 113b is, for example, an annular shape (hollow cylindrical shape).

[0040] The cathode-side power supply 113 a is provided between the cathode-side separator 112 a and the electrolyte membrane 111 .

[0041] The anode-side power supply 113 b is provided between the anode-side separator 112 b and the electrolyte membrane 111 .

[0042] The cathode side catalyst 114a is provided on the surface of the electrolyte membrane 111 between the cathode side power supply 113a and the electrolyte membrane 111. The cathode side catalyst 114a is, for example, a platinum catalyst.

[0043] The anode-side catalyst 114b is provided on the surface of the electrolyte membrane 111 between the anode-side power supply 113b and the electrolyte membrane 111. The anode-side catalyst 114b is, for example, a platinum-based catalyst or a ruthenium-based catalyst.

[0044] The cathode catalyst 114a and the anode catalyst 114b are shaped like a ring, for example.

[0045] The normal-pressure hydrogen supply channel 115 is a hole that penetrates the electrolyte membrane 111 , the cathode-side separator 112 a , and the anode-side separator 112 b . The normal-pressure hydrogen supply channel 115 is a flow path for supplying normal-pressure hydrogen before it is pressurized to the battery cell 110 .

[0046] The atmospheric-pressure hydrogen flow path 116 communicates with the atmospheric-pressure hydrogen supply passage 115. The atmospheric-pressure hydrogen flow path 116 supplies atmospheric-pressure hydrogen along the anode-side power supply body 113b.

[0047] Normal pressure hydrogen flowing through the normal pressure hydrogen flow channel 116 is converted into hydrogen ions and electrons by electricity on the anode side catalyst 114b. The hydrogen ions generated by the reaction move to the cathode side catalyst 114a side via the electrolyte membrane 111, and bond with the electrons to become hydrogen. The hydrogen flows along the high pressure hydrogen flow channel in the cathode side power supply 113a.

[0048] The atmospheric pressure hydrogen discharge channel 117 is a hole that penetrates the electrolyte membrane 111, the cathode side diaphragm 112a, and the anode side diaphragm 112b. The atmospheric pressure hydrogen discharge channel 117 is a flow channel for discharging the unreacted portion of the atmospheric pressure hydrogen supplied as described above that is not converted into hydrogen ions and electrons. For example, the unreacted atmospheric pressure hydrogen is supplied to the battery cell 110 by circulating again in the system.

[0049] The high-pressure hydrogen discharge passage 118 is a flow passage for discharging the hydrogen generated as described above to the high-pressure hydrogen flow passage 119 .

[0050] The high-pressure hydrogen flow path 119 is a hole that penetrates the electrolyte membrane 111 , the cathode diaphragm 112 a , and the anode diaphragm 112 b . The high-pressure hydrogen flow path 119 is a flow path for conveying the high-pressure hydrogen from the battery cell 110 to the piston portion 120 and the high-pressure hydrogen outlet 150 .

[0051] use Figure 3 The piston portion 120 will be further described. Figure 3 FIG. 1 is an axial cross-sectional view showing an example of the piston portion 120 .

[0052] As an example, the piston part 120 includes: a fixed part 121, a movable part 122, a disc spring 123, a spring shaft 124, a ring part 125, and a sealing part 126. In addition, the piston part 120 may also include an insulating layer such as an insulating material or an insulating coating on the end plate 160a side of the movable part 122, instead of the insulating plate 170a. Alternatively, in order to further improve the insulation, even if the insulating plate 170a is provided, the piston part 120 may also include an insulating layer such as an insulating material or an insulating coating.

[0053] The fixed part 121 is located between the top plate 130a and the movable part 122. The fixed part 121 is fixed to the top plate 130a. The bottom surface of the fixed part 121 contacts the upper surface of the disc spring 123. There is a gap between the fixed part 121 and the movable part 122. As an example, the fixed part 121 includes a recess 1211, a groove 1212, and a high-pressure hydrogen flow channel 1213. Figure 3 In addition, also use Figure 4The fixing member 121 will be described. Figure 4 The fixing member 121 Figure 3 The AA line cross-sectional view is shown. In addition, the fixing member 121 is an example of a first member.

[0054] The recessed portion 1211 is a cylindrical hole. The fixed member 121 has a plurality of recessed portions 1211 arranged at equal intervals on the circumference. That is, in the movable member 122, the axes of the recessed portions 1211 are arranged at equal angles on the same circumference. Figure 3 and Figure 4 The fixing member 121 shown has four recesses 1211. Therefore, the interval between the axes of the recesses 1211 is 90 degrees. In addition, the number of the recesses 1211 may not be four.

[0055] like Figure 4 As shown, the groove 1212 is a groove formed on the fixing member 121 in such a way that the high-pressure hydrogen flow channel 1213 is connected to the recess 1211. The fixing member 121 has one groove 1212 relative to one recess 1211. The cross-sectional area of ​​the groove 1212 is preferably more than half of the cross-sectional area of ​​the narrowest part of the high-pressure hydrogen flow channel in the piston part 120. This is because if the cross-sectional area of ​​the groove 1212 is more than this area, hydrogen can easily pass through the groove 1212 and enter the recess 1211. By limiting the inflow amount of the groove 1212, the increase rate of the pressure in the recess 1211 can be suppressed, so that the uneven distribution of the load caused by the offset of the disc springs can be further prevented. In addition, the high-pressure hydrogen flow channel in the piston part 120 is the high-pressure hydrogen flow channel 1213 and the high-pressure hydrogen flow channel 1222. For example, in the case where the cross-sectional area of ​​the groove 1212 is rectangular, if the cross-sectional area is set to S1, the depth is set to d, and the width is set to w, then S1 = d×w. In addition, when the cross section of the high-pressure hydrogen flow path in the piston portion 120 is circular, the radius of the narrowest portion is set to r. In this case, it is preferred that S1≧(πr 2 ) / 2. In addition, the cross-sectional shape of the groove 1212 is not limited to a rectangle, and may be a V-shaped, U-shaped, semicircular or other shapes. In addition, the cross-sectional shape of the high-pressure hydrogen flow channel is not limited to a circle, and may be a polygon such as a square or other shapes. In addition, the groove 1212 is an example of the first fluid path.

[0056] The high-pressure hydrogen flow channel 1213 is a hole through which the high-pressure hydrogen generated in the battery cell 110 passes. The high-pressure hydrogen flow channel 1213 is in communication with the high-pressure hydrogen flow channel 1222 and the high-pressure hydrogen flow channel 131 .

[0057] The movable member 122 is located between the fixed member 121 and the insulating plate 170a. The lower bottom surface of the fixed member 121 and the upper bottom surface of the movable member 122 are opposite to each other. The movable member 122 is movable in the up and down direction. As an example, the movable member 122 includes a spring recess 1221 and a high-pressure hydrogen flow channel 1222. In addition, the movable member 122 is an example of a second member.

[0058] The spring recess 1221 is a cylindrical hole for embedding the disc spring 123. The number of spring recesses 1221 is the same as the number of recesses 1211. Therefore, here, the number of spring recesses 1221 is four. The axis of each spring recess 1221 is consistent with the axis of the relative recess 1211. Each spring recess 1221 is connected to the relative recess 1211. The mutually opposite recesses 1211 and spring recesses 1221 form a hydrogen chamber for hydrogen to flow into from the high-pressure hydrogen flow channel 1213 and the high-pressure hydrogen flow channel 1222. The pressure of the hydrogen in the hydrogen chamber applies a force in the direction of pushing the fixed component 121 and the movable component 122 apart. In addition, since there is a gap between the fixed component 121 and the movable component 122, all hydrogen chambers, high-pressure hydrogen flow channels 1213 and high-pressure hydrogen flow channels 1222 are connected via the gap. In addition, the hydrogen chamber is an example of a fluid chamber.

[0059] The high-pressure hydrogen flow channel 1222 is a cylindrical hole through which the high-pressure hydrogen generated in the battery cell 110 passes. The high-pressure hydrogen flow channel 1222 is in communication with the high-pressure hydrogen flow channel 1213 and the high-pressure hydrogen flow channel 171 .

[0060] The disc spring 123 is a disc spring in a state of being clamped by the bottom surface of the spring recess 1221 of the movable part 122 and the lower bottom surface of the fixed part 121. The disc spring 123 pushes the bottom surface of the spring recess 1221 and the lower bottom surface of the fixed part 121 by elastic force. Therefore, the disc spring 123 exerts elastic force in the direction of pushing the fixed part 121 and the movable part 122 apart. Since the fixed part 121 is fixed, the disc spring 123 presses the movable part 122 downward by elastic force. In addition, Figure 3 The disc spring 123 shown is a disc spring having a hole in the center. The disc spring 123 does not move in the horizontal direction due to the side surface of the spring recess 1221 and the spring shaft 124.

[0061] The piston portion 120 presses the movable member 122 downward by the elastic force of the disc spring 123 and the pressure of hydrogen in the hydrogen chamber.

[0062] The spring shaft 124 is fixed at the bottom center of each spring recess 1221. The piston part 120 has one spring shaft 124 for each spring recess 1221. The spring shaft 124 is a hollow cylindrical component, which is used to pass through the hole opened in the disc spring. In addition, Figure 3The spring shaft 124 is shown to be hollow, but it does not have to be hollow.

[0063] The ring member 125 is an annular member provided so as to surround the fixed member 121 and the movable member 122 .

[0064] The piston part 120 includes two sealing members, for example, a sealing member 126a and a sealing member 126b. The sealing member 126a is, for example, an O-ring provided in a manner surrounding the fixed member 121. The sealing member 126b is, for example, an O-ring provided in a manner surrounding the movable member 122. The sealing member 126 performs sealing in the following manner: hydrogen passing through the gap between the movable member 122 and the movable member 122 does not leak to the front of the sealing member 126.

[0065] In addition, if Figure 3 As shown, the top plate 130a has a high-pressure hydrogen flow channel 131. The high-pressure hydrogen flow channel 131 is a hole through which the hydrogen pressurized by the battery cell 110 passes. The high-pressure hydrogen flow channel 131 is connected to the high-pressure hydrogen outlet 150 and the high-pressure hydrogen flow channel 1213.

[0066] The end plate 160 a has a high-pressure hydrogen flow channel 161 . The high-pressure hydrogen flow channel 161 is a cylindrical hole through which high-pressure hydrogen generated in the battery cell 110 passes. The high-pressure hydrogen flow channel 161 communicates with the high-pressure hydrogen flow channel 171 and the high-pressure hydrogen flow channel 119 .

[0067] The insulating plate 170 a has a high-pressure hydrogen flow channel 171 . The high-pressure hydrogen flow channel 171 is a cylindrical hole through which high-pressure hydrogen generated in the battery cell 110 passes. The high-pressure hydrogen flow channel 171 communicates with the high-pressure hydrogen flow channel 1222 and the high-pressure hydrogen flow channel 161 .

[0068] The electrochemical booster device of the embodiment is stacked with battery cells that perform electrochemical reactions, and is composed of a connecting hole for supplying gas that circulates in each battery cell, a connecting hole for high-pressure gas, a plate for electrical insulation, a piston structure that transfers high-pressure gas to the battery for pressing, and a connecting rod that fixes the whole. Here, in the piston structure, in order to evenly distribute the high-pressure gas in the elastic body space such as the disc spring inside it, in order to prevent the gas from being blocked by the disc spring and the contact surface, a groove is provided on the contact surface to avoid it.

[0069] The electrochemical hydrogen boosting device 100 of the embodiment has a groove 1212 connecting the high-pressure hydrogen flow channel 1213 and the recess 1211. Therefore, even if the disc spring 123 blocks the gap between the fixed component 121 and the movable component 122, and hydrogen is not easy to enter the hydrogen chamber from the gap, the groove 1212 is not easy to be blocked. Therefore, even in this case, the hydrogen in the high-pressure hydrogen flow channel 1213 can flow into the hydrogen chamber through the groove 1212. Thus, the piston part 120 of the embodiment can prevent the load balance from being destroyed, thereby properly pushing the battery cell 110. In addition, the piston part 120 of the embodiment, when the electrochemical hydrogen boosting device 100 stops and the hydrogen in the high-pressure hydrogen flow channel 1213 is decompressed, the hydrogen in the hydrogen chamber flows to the high-pressure hydrogen flow channel 1213 through the groove 1212, so the load of the disc spring 123 can be properly removed.

[0070] The electrochemical hydrogen pressure boosting device 100 of the embodiment has a groove 1212 formed on the lower bottom surface of the fixing member 121. Since the disc spring 123 is in contact with the lower bottom surface, the groove 1212 is not blocked.

[0071] The above-mentioned embodiment can also be modified as follows.

[0072] The fixing member of the embodiment may also be Figure 5 The form shown. Figure 5 1 is a cross-sectional view showing a fixing member 121b as a modified example of the fixing member 121. The fixing member 121b has a groove 1214 instead of the groove 1212. The groove 1214 is formed in a manner to connect the high-pressure hydrogen flow channel 1213 and the recess 1211, similarly to the groove 1212. However, the fixing member 121b has a plurality of grooves 1214 with respect to one recess 1211. As an example, the plurality of grooves 1214 are arranged in parallel. Figure 5 The fixing member 121b shown has four grooves 1214 with respect to one recess 1211. However, the number of the grooves 1214 with respect to each recess 1211 is not limited to four.

[0073] In addition, the total cross-sectional area of ​​the grooves 1214 connected to one recess 1211 is preferably at least one-half of the cross-sectional area of ​​the narrowest portion of the high-pressure hydrogen flow path in the piston portion 120. For example, when the cross-sectional shapes of the grooves 1214 are all the same, when the number of grooves 1214 connected to one recess 1211 is set to n and the cross-sectional area of ​​one groove 1214 is set to S2, it is preferably n·S2≧(πr 2 ) / 2. In addition, the groove 1214 is an example of a first fluid path.

[0074] In the electrochemical hydrogen pressure boosting device of the embodiment, as described above, there are a plurality of grooves 1214, and thus, even if some grooves 1214 are blocked for some reason, hydrogen flows into the hydrogen chamber from other grooves 1214. In addition, since the contact cross-sectional area between the fixing member 121b and the disc spring 123 can be reduced, even if the fixing member 121b and the disc spring 123 are adhered to each other for some reason, the pressure of the recessed portion 1211 can be increased by flowing hydrogen from the high-pressure hydrogen flow channel 1213 into the recessed portion 1211, thereby easily pulling the fixing member 121b and the disc spring 123 apart.

[0075] The fixing member of the embodiment may also be Figure 6 The form shown. Figure 6 1 is a cross-sectional view showing a fixing member 121c as a modified example of the fixing member 121. The fixing member 121c has a groove 1215 in addition to the groove 1212. The groove 1215 is a groove formed so that the concave portion 1211 is connected to another concave portion 1211. Figure 6 The grooves 1215 shown are connected to two grooves 1215 that connect each recess 1211 to the two nearest recesses 1211. Therefore, in this case, the number of grooves 1215 is the same as the number of recesses 1211. In addition, the grooves 1215 are an example of a second fluid path.

[0076] As described above, the electrochemical hydrogen pressure boosting device of the embodiment has the groove 1215 connecting the recesses 1211 to the recesses 1211 , thereby making the pressure of hydrogen in the plurality of recesses 1211 equal.

[0077] In addition, the fixing member of the embodiment may include a plurality of grooves arranged in parallel like the grooves 1214 and formed so as to connect the recessed portions 1211 to other recessed portions 1211 , instead of the grooves 1215 .

[0078] In addition, the fixing member of the embodiment may include the groove 1214 and the groove 1215 .

[0079] The piston portion of the embodiment may include other elastic bodies such as other springs capable of exerting elastic force instead of the disc springs 123 .

[0080] In the above embodiment, the fixed part has a groove. However, the movable part of the embodiment may also have a groove instead of the fixed part or in addition to the fixed part. The position of the groove in this case is, for example, a position opposite to the formation position of the groove of the fixed part in the above embodiment.

[0081] In the above-mentioned embodiment, the fixing component may also have a hole instead of the groove or a hole in addition to the groove. For example, the fixing component may also have a hole instead of the groove 1212 or the groove 1214, or a hole in addition to the groove 1212 or the groove 1214. The hole is a hole that connects the high-pressure hydrogen flow channel 1213 to the recess 1211. The hole, like the groove 1212 or the groove 1214, serves as a path for the water path in the high-pressure hydrogen flow channel 1213 to flow into the recess 1211. The hole is an example of a first fluid path. The total cross-sectional area of ​​the groove and the hole connecting a recess 1211 and the high-pressure hydrogen flow channel 1213 is the same as that of the case where there is only a groove, and is preferably more than half of the cross-sectional area of ​​the narrowest part of the high-pressure hydrogen flow channel in the piston part 120.

[0082] In addition, the fixing member may have a hole instead of the groove 1214, or in addition to the groove 1215. The hole connects the recessed parts 1211 to the recessed parts 1211 in the same manner as the groove 1215. The hole is an example of a second fluid path.

[0083] In the above embodiment, a device for boosting the pressure of hydrogen is described. However, the electrochemical boosting device of the embodiment may also be a device for boosting the pressure of a gas other than hydrogen or other fluids other than hydrogen. In this case, the structure of the battery cell is a structure corresponding to the fluid to be manufactured.

[0084] The electrochemical booster of the embodiment may be a device that produces hydrogen and boosts the pressure by water electrolysis. In this case, the electrochemical booster supplies water to the battery cell. And the battery cell generates hydrogen by water electrolysis.

[0085] The embodiments of the present invention have been described above, but these are examples and are not intended to limit the scope of the present invention. The embodiments of the present invention can be implemented in various forms within the scope of the present invention.

[0086] Reference numerals

[0087] 100: Electrochemical hydrogen booster

[0088] 110: Battery Cell

[0089] 111: Electrolyte membrane

[0090] 112a: Cathode side diaphragm

[0091] 112b: Anode side diaphragm

[0092] 113a: cathode side power supply

[0093] 113b: Anode side power supply

[0094] 114a: Cathode side catalyst

[0095] 114b: Anode side catalyst

[0096] 115: Atmospheric pressure hydrogen supply channel

[0097] 116: Atmospheric pressure hydrogen flow channel

[0098] 117: Atmospheric pressure hydrogen discharge channel

[0099] 118: High-pressure hydrogen discharge channel

[0100] 119, 131, 161, 171, 1213, 1222: High-pressure hydrogen flow channel

[0101] 120: Piston

[0102] 121: Fixed parts

[0103] 122: Moving parts

[0104] 123: Disc spring

[0105] 124: Spring shaft

[0106] 125: Ring parts

[0107] 126a, 126b: Sealing parts

[0108] 130a: Top plate

[0109] 130b: Bottom plate

[0110] 140: Connecting rod

[0111] 150: High-pressure hydrogen outlet

[0112] 160a, 160b: End plate

[0113] 170a, 170b: Insulation board

[0114] 1211: concave part

[0115] 1212, 1214, 1215: Slot

[0116] 1221: Spring recess

[0117] P: Power

Claims

1. An electrochemical booster device comprising: first component; A second component, opposite to the first component; The elastic body exerts elastic force in the direction of pushing the first member and the second member apart to push the electrochemical cell, and the supply gas of the electrochemical cell moves to the opposite side of the partition wall, that is, the solid polymer electrolyte membrane, due to electricity, thereby being pressurized; a fluid chamber containing the elastic body and a high-pressure gas, wherein the pressure of the high-pressure gas is applied in a direction to push the first component and the second component apart; and A first fluid path formed on at least one of the first member and the second member, connecting a flow passage for discharging the high-pressure gas from the electrochemical cell and the fluid chamber, and formed on a surface pressed by the elastic body; By introducing the pressurized gas into the fluid chamber, the first member and the second member are pushed apart by the pressure of the pressurized gas, thereby pressing the stack of electrochemical cells.

2. The electrochemical voltage boosting device according to claim 1, in, The first fluid path is a groove formed on a surface of the first member that is pressed by the elastic body.

3. The electrochemical voltage boosting device according to claim 1, in, A plurality of first fluid paths are provided that connect the flow channel and one of the fluid chambers.

4. The electrochemical voltage boosting device according to claim 1, in, A second fluid path is further provided for connecting the plurality of fluid chambers to each other.

5. The electrochemical voltage boosting device according to claim 1, in, The total cross-sectional area of ​​the first fluid path connecting the flow channel and one of the fluid chambers is equal to or greater than one-half of the cross-sectional area of ​​the narrowest portion of the flow channel.

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