Current pulse control circuit for fuel cell

Abstract

The present invention relates to a current pulse control circuit for a closed fuel cell and, more specifically, to a current pulse control circuit for a fuel cell, comprising: a switching member connected to a fuel cell positive terminal of a fuel cell; a first resistor member, which is connected to the switching member and has a first resistance value smaller than the resistance value of a load; a capacitor including a capacitor positive terminal connected to the first resistor member and a capacitor negative terminal; a second resistor member of which one end is connected to the capacitor positive terminal, of which the other end is connected to the fuel cell negative terminal of the fuel cell, and which has a second resistance value; a switching member operation signal generation member for generating a switching member operation signal; and a switching member operation control operational amplifier (Op-amp), which operates the switching member so as to apply a current pulse (iP) to the fuel cell.

Description

Current pulse control circuit for fuel cells

[0001] The present invention relates to a current pulse control circuit for a fuel cell, and more specifically, to a switching member connected to a positive terminal of a fuel cell, a first resistor member connected to the switching member and having a first resistance value smaller than a load, a capacitor including a positive terminal and a negative terminal of a capacitor connected to the first resistor member, a second resistor member having a second resistance value with one end connected to the positive terminal of a capacitor and the other end connected to the negative terminal of a fuel cell, a switching member operation signal generating member connected to a fuel cell control unit that controls the fuel cell and generates a switching member operation signal for operating the switching member, and a switching member, a capacitor, and a switching member operation signal generating member each connected to the switching member, and when the switching member operation signal is input from the switching member operation signal generating member, a switching member operation current is generated and output to the switching member to operate the switching member, thereby producing a current pulse (i) in the fuel cell. P The present invention relates to a current pulse control circuit for a fuel cell comprising a switching member operation control operational amplifier (Op-amp) that allows ) to be applied.

[0002] Fuel cells, which are power generation devices that convert chemical energy generated by oxidizing fuel into electrical energy, are classified into solid oxide fuel cells, molten carbonate fuel cells, and polymer electrolyte membrane fuel cells depending on the type of electrolyte.

[0003] Among these fuel cells, a Polymer Electrolyte Membrane Fuel Cell (PEMFC) comprises a membrane electrode assembly (MEA) having a catalytic electrode layer equipped with an anode and a cathode centered around an electrolyte membrane permeable to hydrogen ions, a gas diffusion layer (GDL) that evenly distributes reaction gases, and a bipolar plate that supplies reaction gases to the gas diffusion layer and discharges generated water.

[0004] However, during the process in which fuel is oxidized to produce electrical energy in the membrane electrode assembly (MEA) of a fuel cell, oxides may adhere to the surface of the catalyst electrode layer, reducing the oxidation reaction area of ​​the catalyst electrode layer and potentially degrading the power generation performance of the fuel cell.

[0005] Accordingly, a technology is known to apply a current pulse to a fuel cell to remove oxides on the surface of the catalyst electrode layer by generating an instantaneous high current load to prevent the degradation of the fuel cell's power generation performance due to oxidation of the catalyst electrode layer.

[0006] Conventionally, in order to apply a current pulse to a fuel cell, a switch and a low resistor for current limiting were connected to the fuel cell output terminal, and the switch was instantaneously operated according to the voltage and power of the fuel cell measured by the fuel cell control device to generate an instantaneous high current in the fuel cell.

[0007] However, according to conventional current pulse application technology, there was a high possibility that the switch or resistor would be damaged due to the high current flowing through the switch or resistor, and even a slight increase in the operating time of the switch could cause the resistor to break or the fuel cell to become overloaded, leading to a fire in the fuel cell.

[0008] [Prior Art Literature]

[0009] [Patent Literature]

[0010] (Patent Document 1): KR 10-2424731 (Published July 25, 2022)

[0011] (Patent Document 2): CN 117219811 A (Published Dec. 12, 2023)

[0012] The present invention has been devised to solve the above-mentioned problems, and the present invention is intended to provide a current pulse control circuit for a fuel cell with high durability and safety to improve power generation and reduce the risk of fire for fuel cells.

[0013] The problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below.

[0014] A current pulse control circuit for a fuel cell according to one embodiment of the present invention comprises: a switching member connected to a positive terminal of a fuel cell; a first resistor member connected to the switching member and having a first resistance value smaller than a load; a capacitor including a positive terminal and a negative terminal of a capacitor connected to the first resistor member; a second resistor member having a second resistance value, one end of which is connected to the positive terminal of a capacitor and the other end of which is connected to the negative terminal of a fuel cell; a switching member operation signal generating member connected to a fuel cell control unit that controls the fuel cell and generates a switching member operation signal for operating the switching member; and a switching member, a capacitor, and a switching member operation signal generating member, each connected to the switching member, the capacitor, and the switching member operation signal generating member, wherein when a switching member operation signal is input from the switching member operation signal generating member, a switching member operation current is generated and output to the switching member to operate the switching member, thereby producing a current pulse (i) in the fuel cell. P It may include a switching member operation control operational amplifier (Op-amp) that allows ) to be applied.

[0015] Additionally, the switching member operation control operational amplifier (Op-amp) may include an operational amplifier negative terminal connected to a capacitor positive terminal, an operational amplifier positive terminal connected to a switching member operation signal generating member to receive a switching member operation signal, and an operational amplifier output terminal connected to a switching member to output a switching member operation current.

[0016] In addition, the switching member operation control operational amplifier (Op-amp) has a current pulse (i) that has passed through the first resistor member. P When the first voltage on the negative terminal side of the operational amplifier becomes higher than the second voltage on the positive terminal side of the operational amplifier due to the capacitor voltage of the capacitor being charged, the generation of the switching member operating current is stopped, thereby stopping the operation of the switching member and the current pulse (i P It can stop the creation of ).

[0017] Also, the current pulse (i) charged in the capacitor P ) is the discharge current (i) from the capacitor through the second resistor member D Discharged by ), and discharge current (i) discharged from the capacitor D The discharge time of ) can be determined according to the charging capacity of the capacitor and the second resistance value of the second resistance member.

[0018] In addition, the switching member operation signal generating member has a reference current (i) where the current generated in the fuel cell measured by the fuel cell control unit is the reference current. ref It may include a switching member operating signal device that generates a switching member operating signal and outputs it to the positive terminal of an operational amplifier when it is smaller than ).

[0019] Additionally, the switching member operation signal generating member may include a third resistance member having a third resistance value connected in parallel to the positive terminal of the fuel cell, and a fourth resistance member connected to the third resistance member and having a fourth resistance value smaller than the third resistance value.

[0020] Additionally, the switching member operation signal generating member can generate a switching member operation signal by the first voltage difference between the third voltage applied to the third resistor member and the fourth voltage applied to the fourth resistor member, and output the switching member operation signal to the positive terminal of an operational amplifier connected between the third resistor member and the fourth resistor member.

[0021] In addition, the switching member operation control operational amplifier can operate the switching member by generating a switching member operation current and outputting it to the switching member when the second voltage on the positive terminal side of the operational amplifier due to the first voltage difference is higher than the capacitor voltage.

[0022] Additionally, the switching member operation signal generating member may further include a first switching member operation signal generating member comprising a switching member operation signal device that generates a switching member operation signal and outputs it to the positive terminal of an operational amplifier when a first current of the fuel cell measured by the fuel cell control unit is smaller than a reference current, and a second switching member operation signal generating member comprising a third resistor having a third resistor having a third resistor having a third resistor having a resistor having a fourth resistor having a

[0023] According to the current pulse control circuit of the present embodiment, at the time of application of the current pulse, a current pulse (i) is applied to the fuel cell (1) (Fuel Cell (FC)). P The application of ) begins, and a current pulse (i) to the fuel cell (Fuel Cell (FC)) PWhile the application of ) continues, the oxide film and anions formed on the surface of the catalytic electrode layer of the membrane electrode assembly (MEA) of the fuel cell (FC) can be removed, thereby restoring the performance of the fuel cell (FC).

[0024] In addition, according to a current pulse control circuit for a fuel cell according to one embodiment of the present invention, the operation of the switching member can be automatically stopped by a capacitor and a switching member operation control operational amplifier (Op-amp) connected to the capacitor. Therefore, since the switching member malfunctions due to a malfunction of the fuel cell control unit (4) and an excessive current flows through the switching member and the first resistor member, the loss or failure of the switching member and the first resistor member can be prevented, and the fuel cell (Fuel Cell (FC)) can be prevented from being damaged or a fire occurring due to an excessive current being applied to the fuel cell (Fuel Cell (FC)).

[0025] In addition, according to a current pulse control circuit for a fuel cell according to one embodiment of the present invention, depending on the power generation status of the fuel cell (Fuel Cell (FC)), one of the first switching member operation signal generating member and the second switching member operation signal generating member is selected by the control of the conversion switch member, and a current pulse (i) is applied to the fuel cell (Fuel Cell (FC)). P Since ) can be applied, current pulses (i) can be efficiently applied to the fuel cell (Fuel Cell (FC)). P ) can be authorized.

[0026] In addition, according to a current pulse control circuit for a fuel cell according to an embodiment of the present invention, even if either the first switching member operating signal generating member or the second switching member operating signal generating member fails or malfunctions, one of the first switching member operating signal generating member and the second switching member operating signal generating member is selected to apply a current pulse (i) to the fuel cell (Fuel Cell (FC)). P Since ) can be applied, a current pulse (i) can be stably applied to the fuel cell (Fuel Cell (FC)). P ) can be authorized.

[0027] FIG. 1 is a block diagram schematically showing a current pulse control circuit for a fuel cell applied to a fuel cell according to one embodiment of the present invention.

[0028] FIG. 2 is a circuit diagram of a current pulse control circuit for a fuel cell according to a first embodiment of the present invention.

[0029] FIG. 3 shows a current pulse (i) applied to a fuel cell by the current pulse control circuit of FIG. 2. P It is a graph representing ).

[0030] FIG. 4 is a circuit diagram of a current pulse control circuit for a fuel cell according to a second embodiment of the present invention.

[0031] FIG. 5 is a circuit diagram of a current pulse control circuit for a fuel cell according to a third embodiment of the present invention.

[0032] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms.

[0033] Hereinafter, the technical features of the present invention will be specifically described with reference to the attached drawings.

[0034] FIG. 1 is a block diagram schematically showing a current pulse control circuit for a fuel cell applied to a fuel cell according to one embodiment of the present invention.

[0035] Referring to FIG. 1, a current pulse control circuit for a fuel cell according to one embodiment of the present invention may include a switching member, a first resistor member, a capacitor, a second resistor member, a switching operation signal generating member, and a switching member operation control operational amplifier (Op-amp).

[0036] In detail, the switching member according to the present embodiment generates a generated current (i) through a power supply line (2). L It can be connected to a fuel cell (1) (Fuel Cell (FC)) that supplies ) as a load.

[0037] In addition, the generated current (i) in the fuel cell (1) (Fuel Cell (FC)) according to the present embodiment L A first resistor member having a first resistance value smaller than the load receiving the power can be connected to a switching member, a capacitor can be connected to the first resistor member, and a second resistor member having a second resistance value can have one end connected to the capacitor and the other end connected to a power supply line (2).

[0038] In addition, the switching member operation signal generating member according to the present embodiment is connected to a fuel cell control unit (4) (Controller) that controls a fuel cell (1) (Fuel Cell (FC)) and can generate a switching member operation signal to operate the switching member, and a switching member operation control operational amplifier (Op-amp) can be connected to each of the switching member, capacitor, and switching member operation signal generating member.

[0039] According to the present embodiment, when a switching member operating signal generated by a switching member operating signal generating member is input to a switching member operating control operational amplifier (Op-amp), a switching member operating current is generated in the switching member operating control operational amplifier (Op-amp) and output to the switching member to operate the switching member, thereby causing a current pulse (i) passing through a first resistor member in a fuel cell (1) (Fuel Cell (FC)). P It can cause ).

[0040] In addition, according to the present embodiment, a current pulse (i) that has passed through the first resistance member P When the voltage of the capacitor charged with ) becomes higher than the voltage of the switching member operation control operational amplifier (Op-amp), the generation of the switching member operation current in the switching member operation control operational amplifier (Op-amp) is stopped, the operation of the switching member is stopped, and the current pulse (i) applied to the fuel cell (1) (Fuel Cell (FC)) P The creation of ) may be interrupted.

[0041] Accordingly, according to the present embodiment, the operation of the switching member can be automatically stopped by the capacitor and the switching member operation control operation amplifier (Op-amp) connected to the capacitor. Therefore, since the switching member malfunctions due to the malfunction of the fuel cell control unit (4) and excessive current flows through the switching member and the first resistor member, the loss or failure of the switching member and the first resistor member can be prevented, and the fuel cell (1) (Fuel Cell (FC)) is not damaged or a fire occurs due to excessive current being applied to the fuel cell (1).

[0042] Hereinafter, the operating mechanism of a current pulse control circuit for a fuel cell to prevent loss and failure of a switching member and a first resistance member, and loss and fire of a fuel cell (FC), according to an embodiment of the present invention, will be described in detail.

[0043] FIG. 2 is a circuit diagram of a current pulse control circuit for a fuel cell according to a first embodiment of the present invention, and FIG. 3 is a current pulse (i) applied to a fuel cell by the current pulse control circuit of FIG. 2. P It is a graph representing ).

[0044] Referring to FIGS. 2 and 3, a current pulse control circuit (100) for a fuel cell may include a switching member (Q1) (10), a first resistor member (R1) (20), a capacitor (C1) (30), a second resistor member (R2) (40), a switching operation signal generating member (50), and a switching member operation control operational amplifier (Op-amp) (60).

[0045] In detail, the switching member (Q1) (10) according to the present embodiment generates a current (i) through a power supply line (2). L It can be connected to the positive terminal of a fuel cell (1) (Fuel Cell (FC)) that supplies ) as a load.

[0046] The switching member (Q1) (10) according to the present embodiment may include a relay or a MOSFET.

[0047] Additionally, the first resistor member (R1) (20) according to the present embodiment can be connected to the switching member (Q1) (10), and the first resistor member (20) generates current (i) through the power supply line (2) from the fuel cell (1) (Fuel Cell (FC)). L It can have a first resistance value smaller than the load supplied with ).

[0048] Additionally, the capacitor (Q1) (30) according to the present embodiment may include a capacitor positive terminal connected to a first resistor member (R1) (20), and a second resistor member (R2) (40) having a second resistance value may have one end connected to the capacitor positive terminal of the capacitor (C1) (30) and the other end connected to a power supply line (2) and connected to the fuel cell negative terminal of the fuel cell (1) (Fuel Cell (FC)).

[0049] Additionally, the switching member operation signal generating member (50) generated according to the present embodiment may include a switching member operation signal device (51) that generates a switching member operation signal for operating a switching member (Q1) (10), and is connected to a fuel cell control unit (4) (Controller) that controls a fuel cell (1) (Fuel Cell (FC)).

[0050] Additionally, the switching member operation control operational amplifier (Op-amp) (60) according to the present embodiment may be connected to each of the switching member (10), capacitor (C1) (30), and switching member operation signal generating member (50). When a switching member operation signal is input from the switching member operation signal generating member (50), a switching member operation current is generated and output to the switching member (Q1) (10) to operate the switching member (Q1) (10) and a current pulse (i) is applied to the fuel cell (1) (Fuel Cell (FC)). P It can be made to be authorized.

[0051] Here, the switching member operation control operation amplifier (Op-amp) (60) according to the present embodiment may include an operation amplifier (Op-amp) comprising an operation amplifier negative terminal connected to the positive terminal of a capacitor (C1) (30), an operation amplifier positive terminal connected to a switching member operation signal generating member (50) to receive a switching member operation signal, and an operation amplifier output terminal connected to a switching member (Q1) (10) to output a switching member operation current.

[0052] In the following, a current pulse (i) applied to a fuel cell (1) (Fuel Cell (FC)) according to the present embodiment P ) application time, current pulse(i P ) Application interruption point and current pulse (i P The operating mechanism of the components included in the current pulse control circuit (100) for a fuel cell related to the application cycle is described in detail.

[0053] First, a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)) according to the present embodiment. P The current pulse (i) at the point where the application of ) begins. P Explains the operating mechanism of the components related to the authorization timing.

[0054] The switching member operation signal device (51) according to the present embodiment is a reference current (i) in which the current generated from the fuel cell (1) (Fuel Cell (FC)) measured by the fuel cell control unit (1) ref When it is smaller than ), a switching member operation signal can be generated and output to the positive terminal of the operational amplifier.

[0055] More specifically, the power generation current (i) of a fuel cell (1) (Fuel Cell (FC)) in operation according to the present embodiment L ) can be measured by a current sensor (not shown) connected to the fuel cell (1) (Fuel Cell (FC)) and transmitted to the fuel cell control unit (1).

[0056] At this time, the fuel cell control unit (1) generates the current (i) of the fuel cell (1) (Fuel Cell (FC)) that is generating power. L ) is the reference current (i ref Compared to ), the generated current (i L ) is the reference current (i ref If it is lower than ), the switching member operating signal device (51) of the switching member operating signal generating member (50) can be instructed to generate a switching member operating signal.

[0057] Here, the reference current (i) of the fuel cell (1) (Fuel Cell (FC)) according to the present embodiment ref ) is the minimum power generation current (i) when the power generation performance of the fuel cell (1) (Fuel Cell (FC)) is a predetermined minimum power generation performance due to surface oxidation of the catalyst electrode layer of the membrane electrode assembly (MEA). L It can be determined as ).

[0058] When the fuel cell control unit (1) instructs the generation of a switching member operation signal, the switching member operation signal device (51) can generate the switching member operation signal and input the switching member operation signal to the positive terminal of the operation amplifier of the switching member operation control operation amplifier (Op-amp) (60).

[0059] When a switching member operation signal is input to the positive terminal of the operational amplifier of the switching member operation control operational amplifier (Op-amp) according to the present embodiment, the switching member operation control operational amplifier (Op-amp) (60) can generate a switching member operation current and output it to the switching member (Q1) (10) through the operational amplifier output terminal.

[0060] Subsequently, as shown in FIG. 3, when a switching member operating current is output to the switching member (Q1) (10) and the switching member (Q1) (10) is operated, a current pulse (i) is given to the fuel cell (1) (Fuel Cell (FC)). P The current pulse (i) at the point where the application of ) begins. P The authorization point may begin.

[0061] In the following, a current pulse (i) to a fuel cell (1) (Fuel Cell (FC)) according to the present embodiment P Explains the current pulse application mechanism to which ) is applied.

[0062] Referring to FIG. 3, since the first resistance value of the first resistance member (R1) (20) according to the present embodiment has a resistance value lower than the load, the current pulse (i) applied to the fuel cell (1) (Fuel Cell (FC)) P ) is the generated current (i) of the fuel cell (1) (Fuel Cell (FC)). L It can be higher than ).

[0063] In detail, according to the present embodiment, current generated from a fuel cell (1) (Fuel Cell (FC)) by the operation of a switching member (Q1) (10) can pass through a first resistance member (R1) (20) having a first resistance value lower than a load, rather than a power supply line (2).

[0064] At this time, as shown in FIG. 3, the outlet voltage (V) of the fuel cell (1) (Fuel Cell (FC)) F Due to a first resistance value lower than the load of the first resistance member (R1) (20) having the same voltage as ), the generated current (i) passing through the load L Current pulse (i) higher than ) P ) can be applied to the fuel cell (1) (Fuel Cell (FC)) and pass through the first resistance member (R1) (20).

[0065] In addition, a current pulse (i) applied to a fuel cell (1) (Fuel Cell (FC)) according to the present embodiment P ) is inversely proportional to the first resistance value of the first resistance member (R1) (20), that is, if the first resistance value is increased, the current pulse (i) P If the first resistance value is lowered so that ) becomes lower, the current pulse (i P ) can be adjusted to increase.

[0066] For example, a current pulse (i) according to the present embodiment P ) can be adjusted to approximately twice the rated current (i0) by adjusting the first resistance value of the first resistance member (R1) (20).

[0067] Ultimately, according to the current pulse control circuit (100) according to the present embodiment, at the time of current pulse application, a current pulse (i) is applied to the fuel cell (1) (Fuel Cell (FC)). P The application of ) begins, and a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)) PWhile the application of ) continues, the oxide film and anions formed on the surface of the catalytic electrode layer of the membrane electrode assembly (MEA) of the fuel cell (1) (Fuel Cell (FC)) are removed, and the performance of the fuel cell (1) (Fuel Cell (FC)) can be restored.

[0068] In addition, a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)) according to the present embodiment P The operating mechanism of the components related to the current pulse application interruption point, which is the point at which the application of ) is interrupted, is described below.

[0069] The switching member operation control operational amplifier (Op-amp) (60) according to the present embodiment has a current pulse (i) that passes through the first resistor member (R1) (20). P When the first voltage on the negative terminal side of the operational amplifier becomes higher than the second voltage on the positive terminal side of the operational amplifier due to the capacitor voltage of the capacitor (C1) (30) that is charged, the generation of the switching member operating current is stopped, thereby stopping the operation of the switching member (Q1) (10) and the current pulse (i P It can stop the creation of ).

[0070] According to the present embodiment, current pulse (i P A current pulse (i) that starts being applied to the fuel cell (1) (Fuel Cell (FC)) at the time of application. P ) is a current pulse (i) that passes through the switching member (Q1) (10) and the first resistor member (R1) (10). P ) can start charging the capacitor (C1) (30).

[0071] In this way, a current pulse (i) is applied to the capacitor (C1) (30). PWhen charging of the capacitor (C1) (30) begins, the current flowing through the first resistor member (R1) (10) decreases, and the voltage at the positive terminal of the capacitor (C1) (30) becomes higher than 0V, so that the first voltage at the negative terminal of the operational amplifier of the switching member operation control operational amplifier (Op-amp) (60), which was 0V before charging of the capacitor (C1) (30) began, can become higher than 0V.

[0072] Subsequently, when charging of the capacitor (C1) (30) begins and the first voltage at the negative terminal of the operational amplifier (Op-amp) (60) of the switching member operation control operational amplifier becomes higher than the second voltage at the positive terminal of the operational amplifier, the generation of the switching member operation current in the switching member operation control operational amplifier (Op-amp) (60) is stopped and the operation of the switching member (Q1) (10) is stopped, and a current pulse (i) is produced in the fuel cell (1) (Fuel Cell (FC)). P The current pulse (i) at the point where the application of ) is interrupted P The point at which authorization is suspended may begin.

[0073] Ultimately, according to the current pulse control circuit (100) of the present embodiment, even if a switching member operation signal is abnormally generated due to a failure or malfunction of the fuel cell control unit (1) or the switching member operation signal generating unit (50), the current pulse application interruption point is initiated by the capacitor (C1 (30) and the switching member operation control operational amplifier (Op-amp) (60), and a current pulse (i) is applied to the fuel cell (1) (Fuel Cell (FC)). P The application of ) is automatically stopped, and a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)) P Since excessive application of ) can be prevented, loss of the switching member (Q1) (10) or the first resistor member (R1) (20) due to excessive current can be prevented, and the current pulse (i PThis can prevent the performance of the membrane electrode assembly (MEA) of the fuel cell (1) (Fuel Cell (FC)) from deteriorating or causing a fire due to excessive application.

[0074] A current pulse (i) to a fuel cell (1) (Fuel Cell (FC)) according to the present embodiment P The current pulse (i) at the point in time when the interruption of the application of ) continues. P The operating mechanism of the components related to the authorization cycle is as described below.

[0075] In the following, a current pulse (i) to a fuel cell (1) (Fuel Cell (FC)) according to the present embodiment P The current pulse (i) at the point where the application of ) is interrupted P ) Current pulse (i) related to the duration of the application interruption point P Explains the operating mechanism of the components related to the authorization cycle.

[0076] According to the present embodiment, a current pulse (i) applied to a fuel cell (1) (Fuel Cell (FC)) P The current pulse application period of ) can be controlled by the charging capacity of the capacitor (C1) (30) and the second resistance value of the second resistor member (R2) (40).

[0077] According to the present embodiment, a current pulse (i) charged in the capacitor (C1) (30) P ) is the discharge current (i) from the capacitor (C1) (30) through the second resistor member (R2) (40). D Discharged by ) and discharge current (i) discharged from capacitor (C1) (30) D The discharge time of ) can be determined according to the charging capacity of the capacitor (C1) (30) and the second resistance value of the second resistance member (R2) (40).

[0078] In detail, as shown in FIG. 3, a current pulse (i) to a fuel cell (1) (Fuel Cell (FC)). PWhen the application of ) begins, a current pulse (i) passes through the switching member (Q1) (10) and the first resistor member (R1) (20) to the capacitor (C1) (30). P ) begins to charge, and the current charged in the capacitor (C1) (30) is the discharge current (i D It can be gradually discharged to the power supply line (2) through the second resistance member (R2) (40).

[0079] According to the present embodiment, when the charging capacity of the capacitor (C1) (30) increases and the second resistance value of the second resistance member (R2) (40) increases, the discharge time of the capacitor (C1) (30) becomes longer, and thus the time during which the first voltage on the negative terminal side of the operational amplifier of the switching member operation control operational amplifier (Op-amp) (60) is higher than the second voltage on the positive terminal side of the operational amplifier becomes longer, so the time during which the generation of the switching member operation current in the switching member operation control operational amplifier (Op-amp) (60) is interrupted can be extended.

[0080] Accordingly, if the time during which the generation of the switching member operating current is interrupted in the switching member operating control operation amplifier (Op-amp) (60) according to the present embodiment is prolonged, the time of interruption of operation of the switching member (Q1) (10) is prolonged, and a current pulse (i) is produced in the fuel cell (1) (Fuel Cell (FC)). P The current pulse application period can be adjusted so that the time during which the application of ) is interrupted is extended.

[0081] Additionally, according to the present embodiment, when the charging capacity of the capacitor (C1) (30) decreases and the second resistance value of the second resistor member (R2) (40) decreases, the discharge time of the capacitor (C1) (30) is shortened, and thus the time during which the first voltage on the negative terminal side of the operational amplifier of the switching member operation control operational amplifier (Op-amp) (60) is higher than the second voltage on the positive terminal side of the operational amplifier is shortened, so the time during which the generation of the switching member operation current in the switching member operation control operational amplifier (Op-amp) (60) is interrupted can be shortened.

[0082] Here, if the time during which the generation of the switching member operating current is interrupted in the switching member operating control operational amplifier (Op-amp) (60) according to the present embodiment is shortened, the time during which the switching member (Q1) (10) is interrupted from operation becomes longer, and a current pulse (i) is produced in the fuel cell (1) (Fuel Cell (FC)). P A current pulse (i) to shorten the time during which the application of ) is interrupted P The authorization period can be adjusted.

[0083] In addition, according to the present embodiment, the charging capacity of the capacitor (C1) (30) is increased and the second resistance value of the second resistor member (R2) (40) is decreased, or the charging capacity of the capacitor (C1) (30) is decreased and the second resistance value of the second resistor member (R2) (40) is increased, thereby a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)). P The current pulse application period can be controlled by adjusting the time during which the application of ) is interrupted.

[0084] Ultimately, according to the current pulse control circuit (100) of the present embodiment, even if the switching member operation signal is generated at an abnormal period due to a failure or malfunction of the fuel cell control unit (1) or the switching member operation signal generating unit (50), the current pulse (i) applied to the fuel cell (1) (Fuel Cell (FC)) P The current pulse application period of ) is controlled by the charging capacity of the capacitor (C1) (30) and the second resistance value of the second resistance member (40) to apply a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)). P Since excessive application of ) can be prevented, loss of the switching member (Q1) (10) or the first resistor member (R1) (20) due to excessive current can be prevented, and the current pulse (i PThis can prevent the performance of the membrane electrode assembly (MEA) of the fuel cell (1) (Fuel Cell (FC)) from deteriorating or causing a fire due to excessive application.

[0085] FIG. 4 is a circuit diagram of a current pulse control circuit for a fuel cell according to a second embodiment of the present invention.

[0086] Referring to FIG. 4, the current pulse control circuit (200) for a fuel cell according to the present embodiment may include a switching member (Q2) (210), a first resistor member (R3) (220), a capacitor (C2) (230), a second resistor member (R4) (240), a third resistor member (R5) (251) and a fourth resistor member (R6) (252), a switching member operation control operational amplifier (Op-amp) (260).

[0087] Since the current pulse control circuit (200) for a fuel cell according to the present embodiment is configured identically to the current pulse control circuit (100) for a fuel cell according to the first embodiment of the present invention, except for the switching operation signal generating member (250) including the third resistor member (R5) (251) and the fourth resistor member (R6) (252), a detailed description of the configuration identical to the current pulse control circuit (100) for a fuel cell is omitted below.

[0088] According to the present embodiment, the switching operation signal generating member (250) may include a third resistor member (R5) (251) having a third resistance value connected in parallel to the positive terminal of the fuel cell, and a fourth resistor member (R6) (252) connected to the third resistor member (R5) (251) and having a fourth resistance value smaller than the third resistance value.

[0089] Hereinafter, the operating mechanism of the components included in the current pulse control circuit (200) for a fuel cell, related to the timing of the application of a current pulse, the timing of the cessation of the application of a current pulse, and the current pulse application period applied to the fuel cell (1) (Fuel Cell (FC)) according to the present embodiment, will be explained in detail.

[0090] First, a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)) according to the present embodiment. P Explain the operating mechanism of the components related to the current pulse application point, which is the point at which the application of ) begins.

[0091] The switching member operation signal generating member (250) according to the present embodiment can generate a switching member operation signal by the first voltage difference between the third voltage applied to the third resistor member (R5) (251) and the fourth voltage applied to the fourth resistor member (R6) (252), and output the switching member operation signal to the positive terminal of an operational amplifier connected between the third resistor member (R5) (251) and the fourth resistor member (R6) (252).

[0092] More specifically, according to the present embodiment, when power generation of the fuel cell (1) (Fuel Cell (FC)) begins, the third resistor member (R5) (251) connected in parallel to the positive terminal of the fuel cell (1) (Fuel Cell (FC)) has an output voltage (V) of the fuel cell (1) (Fuel Cell (FC)). F A third voltage identical to ) can be applied.

[0093] Here, a fourth resistance member (R6) (252) having a fourth resistance value smaller than the third resistance value of the third resistance member (R5) (251) is subjected to a fourth voltage smaller than the third voltage applied to the third resistance member (R5) (251), so that a first voltage difference can be generated between the third resistance member (R5) (251) and the fourth resistance member (R6) (252).

[0094] The switching member operation signal generated by the first voltage difference between the third resistor member (R5) (251) and the fourth resistor member (R6) (252) can be output to the positive terminal of the operational amplifier connected between the third resistor member (R5) (251) and the fourth resistor member (R6) (252).

[0095] Thus, when a switching member operation signal due to a first voltage difference between the third resistor member (R5) (251) and the fourth resistor member (R6) (252) is input to the positive terminal of the operational amplifier of the switching member operation control operational amplifier (Op-amp) (260), a second voltage corresponding to the first voltage difference between the third resistor member (R5) (251) and the fourth resistor member (R6) (252) can be applied to the positive terminal of the operational amplifier of the operational amplifier (Op-amp) (260).

[0096] Subsequently, the switching member operation control operational amplifier (Op-amp) (260) compares the voltage of the capacitor (Q2) (230) with the second voltage at the positive terminal of the operational amplifier, and if the second voltage at the positive terminal of the operational amplifier due to the first voltage difference is higher than the capacitor voltage, it generates a switching member operation current and outputs it to the switching member (Q2) (210) to operate the switching member (Q2) (210).

[0097] Thus, when the switching element (Q2) (210) is operated by the switching element operating current produced by the switching element operation control operational amplifier (Op-amp) (260), a current pulse (i) is produced in the fuel cell (1) (Fuel Cell (FC)). P The current pulse (i) at the point where the application of ) begins. P The authorization point may begin.

[0098] Here, according to the present embodiment, the capacitor voltage at the time when power generation of the fuel cell (1) (Fuel Cell (FC)) begins may be 0V, and a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)) PWhen the application of ) begins, a current pulse (i) passes through the switching member (Q2) (210) and the first resistor member (R3) (220). P ) can be charged into the capacitor (Q2) (230), and the capacitor voltage can rise above 0V.

[0099] In addition, the switching member (Q2) (210) according to the present embodiment operates to produce a current pulse (i) passing through the switching member (Q2) (210) and the first resistor member (R3) (220). P A current pulse (i) applied to the fuel cell (1) (Fuel Cell (FC)). P The ) application mechanism is a current pulse (i) according to the first embodiment of the present invention. P Since it is identical to the authorization mechanism, a detailed explanation of it is omitted.

[0100] Ultimately, according to the current pulse control circuit (200) according to the present embodiment, at the time of current pulse application, a current pulse (i) is applied to the fuel cell (1) (Fuel Cell (FC)). P The application of ) begins, and a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)) P While the application of ) continues, the oxide film and anions formed on the surface of the catalytic electrode layer of the membrane electrode assembly (MEA) of the fuel cell (1) (Fuel Cell (FC)) are removed, and the performance of the fuel cell (1) (Fuel Cell (FC)) can be restored.

[0101] In addition, according to the current pulse control circuit (200) according to the present embodiment, a current pulse (i) is applied to the fuel cell (1) (Fuel Cell (FC)) by the first voltage difference between the third resistor member (R5) (251) and the fourth resistor member (R6) (252) connected in parallel to the fuel cell (1) (Fuel Cell (FC)) without being affected by a failure or malfunction of the fuel cell control unit (1) or other control device. PSince ) is automatically applied, it is possible to prevent the switching member (Q1) (10) or the first resistor member (R1) (20) from being lost due to excessive current, and the current pulse (i P This can prevent the performance of the membrane electrode assembly (MEA) of the fuel cell (1) (Fuel Cell (FC)) from deteriorating or causing a fire due to excessive application.

[0102] A current pulse (i) to a fuel cell (1) (Fuel Cell (FC)) according to the present embodiment P The operating mechanism of the components related to the current pulse application interruption point, which is the point at which the application of ) is interrupted, is described below.

[0103] The switching member operation control operation amplifier (Op-amp) (60) according to the present embodiment has a current pulse (i) that passes through the first resistor member (R3) (220). P When the first voltage on the negative terminal side of the operational amplifier becomes higher than the second voltage on the positive terminal side of the operational amplifier due to the capacitor voltage of the capacitor (C2) (230) that is charged, the generation of the switching member operating current is stopped, thereby stopping the operation of the switching member (Q1) (10) and the current pulse (i P It can stop the creation of ).

[0104] According to the present embodiment, at the time of application of the current pulse, the current pulse (i) that is applied to the fuel cell (1) (Fuel Cell (FC)) begins to be applied. P ) is a current pulse (i) that passes through the switching member (Q2) (210) and the first resistor member (R3) (220). P ) can start charging the capacitor (C1) (30).

[0105] In this way, a current pulse (i) is applied to the capacitor (C2) (230). PWhen charging of the capacitor (C1) (30) begins, the current flowing through the first resistor member (R3) (220) decreases, and the voltage at the positive terminal of the capacitor (C2) (230) becomes higher than 0V, so that the first voltage at the negative terminal of the operational amplifier of the switching member operation control operational amplifier (Op-amp) (260), which was 0V before charging of the capacitor (C1) (30) began, can become higher than 0V.

[0106] Subsequently, as the charging of the capacitor (C2) (230) continues, when the first voltage at the negative terminal of the operational amplifier of the switching member operation control operational amplifier (Op-amp) (260) becomes higher than the second voltage at the positive terminal of the operational amplifier, the generation of the switching member operation current in the switching member operation control operational amplifier (Op-amp) (60) is stopped and the operation of the switching member (Q2) (210) is stopped, and a current pulse (i) is produced in the fuel cell (1) (Fuel Cell (FC)). P The current pulse application interruption point, which is the point at which the application of ) is interrupted, may begin.

[0107] Ultimately, according to the current pulse control circuit (200) of the present embodiment, the current pulse application interruption point is initiated by the capacitor (C2) (230) and the switching member operation control operational amplifier (Op-amp) (260) without being affected by a failure or malfunction of the fuel cell control unit (1) or other control device, and a current pulse (i) is applied to the fuel cell (1) (Fuel Cell (FC)). P The application of ) is automatically stopped, and a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)) P Since excessive application of ) can be prevented, loss of the switching member (Q2) (210) or the first resistor member (R3) (220) due to excessive current can be prevented, and the current pulse (i PThis can prevent the performance of the membrane electrode assembly (MEA) of the fuel cell (1) (Fuel Cell (FC)) from deteriorating or causing a fire due to excessive application.

[0108] In addition, according to the present embodiment, since the second voltage on the positive terminal side of the operational amplifier corresponds to the first voltage difference between the third resistor member (R5) (251) and the fourth resistor member (R6) (252), the second voltage on the positive terminal side of the operational amplifier can be increased or decreased by increasing or decreasing the first voltage difference according to the increase or decrease in the resistance value of the fourth resistor member (R6) (252).

[0109] For example, if the resistance value of the fourth resistor member (R6) (252) according to the present embodiment is lowered, the first voltage difference between the third resistor member (R5) (251) and the fourth resistor member (R6) (252) is increased, and the second voltage on the positive terminal side of the operational amplifier corresponding to the increased first voltage difference can also be increased.

[0110] Additionally, if the resistance value of the fourth resistor member (R6) (252) according to the present embodiment increases, the first voltage difference between the third resistor member (R5) (251) and the fourth resistor member (R6) (252) is reduced, and the second voltage on the positive terminal side of the operational amplifier corresponding to the reduced first voltage difference can also be reduced.

[0111] According to the present embodiment, the fourth resistor member (R6) (252) may be one of a plurality of resistor members having different resistance values, and the first voltage difference between the third resistor member (R5) (251) and the fourth resistor member (R6) (252) may increase or decrease depending on the resistance value of the resistor member selected as the fourth resistor member (R6) (252).

[0112] Additionally, the fourth resistor member (R6) (252) according to the present embodiment may include a variable resistor, and the first voltage difference between the third resistor member (R5) (251) and the fourth resistor member (R6) (252) may be variably increased or decreased according to the resistance value by the variable resistor of the fourth resistor member (R6) (252).

[0113] Accordingly, according to the present embodiment, the first voltage difference increases or decreases depending on the increase or decrease in the resistance value of the fourth resistor member (R6) (252), and the second voltage on the positive terminal side of the operational amplifier increases or decreases accordingly. Therefore, the point at which the first voltage on the negative terminal side of the operational amplifier of the switching member operation control operational amplifier (Op-amp) (260) becomes higher than the second voltage on the positive terminal side of the operational amplifier becomes earlier or later, so that a current pulse (i) in the fuel cell (1) (Fuel Cell (FC)) is interrupted due to the cessation of operation of the switching member (Q2) (210). P The current pulse (i) at the point where the application of ) is interrupted P The timing of the suspension of authorization may be accelerated or delayed.

[0114] Ultimately, according to the current pulse control circuit (200) of the present embodiment, the second voltage on the positive terminal side of the operational amplifier is adjusted according to the resistance value of the fourth resistor member (R6) (252) to provide a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)) following the cessation of operation of the switching member (Q2) (210). P The current pulse application interruption point, which is the point at which the application of ) is interrupted, can be adjusted.

[0115] In the following, a current pulse (i) to a fuel cell (1) (Fuel Cell (FC)) according to the present embodiment P Explain the operating mechanism of the components that generate the current pulse application cycle related to the duration of the current pulse application interruption point, which is the point at which the application of ) is interrupted.

[0116] According to the present embodiment, a current pulse (i) applied to a fuel cell (1) (Fuel Cell (FC)) PThe current pulse application period of the capacitor (C2) (230) can be adjusted according to the increase or decrease in the second voltage on the positive terminal side of the operational amplifier as the charge capacity of the capacitor (C2) (230), the second resistance value of the second resistance member (R4) (240), and the first voltage difference between the third resistance member (R5) (251) and the fourth resistance member (R6) (252) increase or decrease.

[0117] More specifically, a current pulse (i) to a fuel cell (1) (Fuel Cell (FC)). P When the application of ) begins, a current pulse (i) passes through the switching member (Q2) (210) and the first resistor member (R3) (220) to the capacitor (C2) (230). P ) begins to charge, and the current charged in the capacitor (C2) (230) is the discharge current (i D It can be gradually discharged to the power supply line (2) through the second resistance member (R4) (240).

[0118] According to the present embodiment, when the charging capacity of the capacitor (C2) (230) and the second resistance value of the second resistor member (R4) (240) increase, thereby increasing the discharge time of the capacitor (C2) (230), the time during which the first voltage on the negative terminal side of the operational amplifier of the switching member operation control operational amplifier (Op-amp) (60) is maintained higher than the second voltage on the positive terminal side of the operational amplifier is increased, so the time during which the generation of the switching member operation current in the switching member operation control operational amplifier (Op-amp) (60) is interrupted may be increased.

[0119] Accordingly, if the time during which the generation of the switching member operating current is interrupted in the switching member operating control operation amplifier (Op-amp) (60) according to the present embodiment is prolonged, the time of interruption of operation of the switching member (Q1) (10) is prolonged, and a current pulse (i) is produced in the fuel cell (1) (Fuel Cell (FC)). P The current pulse application period can be adjusted so that the time during which the application of ) is interrupted is extended.

[0120] Additionally, according to the present embodiment, when the charging capacity of the capacitor (C1) (30) decreases and the second resistance value of the second resistor member (R2) (40) decreases, the discharge time of the capacitor (C1) (30) is shortened, and the time during which the voltage on the negative terminal side of the operational amplifier of the switching member operation control operational amplifier (Op-amp) (60) is higher than the voltage on the positive terminal side of the operational amplifier is shortened, so the time during which the generation of the switching member operation current in the switching member operation control operational amplifier (Op-amp) (60) is interrupted can be shortened.

[0121] Here, if the time during which the generation of the switching member operating current is interrupted in the switching member operating control operational amplifier (Op-amp) (60) according to the present embodiment is shortened, the time during which the switching member (Q1) (10) is interrupted from operation becomes longer, and a current pulse (i) is produced in the fuel cell (1) (Fuel Cell (FC)). P The current pulse application period can be adjusted so that the time during which the application of ) is interrupted becomes shorter.

[0122] In addition, according to the present embodiment, the charging capacity of the capacitor (C1) (30) is increased and the second resistance value of the second resistor member (R2) (40) is decreased, or the charging capacity of the capacitor (C1) (30) is decreased and the second resistance value of the second resistor member (R2) (40) is increased, thereby a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)). P By adjusting the time during which the application of ) is interrupted, the current pulse (i P The authorization period can be adjusted.

[0123] Here, according to the present embodiment, the time during which the first voltage on the negative terminal side of the operational amplifier is maintained higher than the second voltage on the positive terminal side of the operational amplifier can be adjusted according to the increase or decrease of the second voltage on the positive terminal side of the operational amplifier corresponding to the first voltage difference that increases or decreases according to the resistance value of the fourth resistor member (R6) (252).

[0124] Ultimately, according to the current pulse control circuit (200) according to the present embodiment, the current pulse (i) applied to the fuel cell (1) (Fuel Cell (FC)) is not affected by failure or malfunction of the fuel cell control unit (1) or other control devices. P The current pulse application period of ) is controlled by the increase or decrease of the second voltage on the positive terminal side of the operational amplifier corresponding to the first voltage difference that increases or decreases according to the charging capacity of the capacitor (C2) (230), the second resistance value of the second resistor member (R4) (240), and the resistance value of the fourth resistor member (R6) (252), thereby applying a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)). P Since excessive application of ) can be prevented, loss of the switching member (Q2) (210) or the first resistor member (R3) (220) due to excessive current can be prevented, and the current pulse (i P This can prevent the performance of the membrane electrode assembly (MEA) of the fuel cell (1) (Fuel Cell (FC)) from deteriorating or causing a fire due to excessive application.

[0125] FIG. 5 is a circuit diagram of a current pulse control circuit for a fuel cell according to a third embodiment of the present invention.

[0126] Referring to FIG. 5, the current pulse control circuit (300) for a fuel cell according to the present embodiment may include a switching member (Q3) (310), a first resistor member (R7) (320), a capacitor (C3) (330), a second resistor member (R8) (340), a switching operation signal generating member (350) including a first switching operation signal generating member (351) and a second switching operation signal generating member (352), a switching member operation control operational amplifier (Op-amp) (360), and a conversion switch member (S1) (370).

[0127] Since the current pulse control circuit (300) for a fuel cell according to the present embodiment is configured identically to the current pulse control circuit (100) for a fuel cell according to the first embodiment of the present invention and the current pulse control circuit (200) for a fuel cell according to the second embodiment of the present invention, except for the conversion switch member (S1) (370), a detailed description of the configuration and operating mechanism identical to the current pulse control circuit (100) and the current pulse control circuit (200) for a fuel cell is omitted below.

[0128] Here, the first switching member operation signal generating member (351) according to the present embodiment may include a switching member operation signal device (3511) that generates a switching member operation signal and outputs it to the positive terminal of an operational amplifier.

[0129] Additionally, the second switching member operation signal generating member (352) according to the present embodiment may include a third resistor member (R9) (3521) having a third resistance value connected in parallel to the positive terminal of the fuel cell, and a fourth resistor member (R10) (3522) connected to the third resistor member (R9) (3521) and having a fourth resistance value smaller than the third resistance value.

[0130] The conversion switch member (S1) (370) according to the present embodiment is connected to the fuel cell control unit (4), and the fuel cell control unit (4) can control one of the first switching member operation signal generating member (351) and the second switching member operation signal generating member (352) to be connected to the positive terminal of the operational amplifier.

[0131] More specifically, according to the present embodiment, when power generation of the fuel cell (1) (Fuel Cell (FC)) begins, a switching member operating current is generated in the switching member operating control operational amplifier (Op-amp) (260) by means of a switching member operating signal generated by either the first switching member operating signal generating member (351) and the second switching member operating signal generating member (352), thereby operating the switching member (Q3) (310) to produce a current pulse (i) in the fuel cell (1) (Fuel Cell (FC)). P ) may be authorized.

[0132] At this time, the fuel cell control unit (1) selects one of the first switching member operation signal generating member (351) and the second switching member operation signal generating member (352) and controls the conversion switch member (S1) (370) to be connected to the positive terminal of the operational amplifier, thereby generating a current pulse (i) in the fuel cell (1) (Fuel Cell (FC)). P It can be made to be authorized.

[0133] For example, when power generation of the fuel cell (1) (Fuel Cell (FC)) begins, the fuel cell control unit (1) controls the conversion switch member (S1) (370) to select the first switching member operation signal generating member (351) and connect it to the positive terminal of the operational amplifier, thereby generating a current pulse (i) in the fuel cell (1) (Fuel Cell (FC)). P It can be made to be authorized.

[0134] Afterward, when the fuel cell control unit (1) determines that the power generation of the fuel cell (1) (Fuel Cell (FC)) has stabilized and that control by the fuel cell control unit (1) is unnecessary after a certain period of time has elapsed, it selects the second switching member operation signal generating member (352) and controls the conversion switch member (S1) (370) so that the positive terminal of the operational amplifier is connected, thereby generating a current pulse (i) in the fuel cell (1) (Fuel Cell (FC)). P It can be made to be authorized.

[0135] However, according to the present embodiment, the fuel cell control unit (1) first selects the first switching member operation signal generating member (351) and a current pulse (i) is applied to the fuel cell (1) (Fuel Cell (FC)). P Not limited to the initiation of the application of ), the fuel cell control unit (1) first selects the second switching member operation signal generating member (352) to apply a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)). P It can cause the authorization of ) to start.

[0136] Ultimately, according to the current pulse control circuit (300) for a fuel cell according to one embodiment of the present invention, depending on the power generation status of the fuel cell (1) (Fuel Cell (FC)), one of the first switching member operation signal generating member (351) and the second switching member operation signal generating member (352) is selected by the control of the conversion switch member (S1) (370) and a current pulse (i) is applied to the fuel cell (1) (Fuel Cell (FC)). P Since ) can be applied, current pulses (i) can be efficiently applied to the fuel cell (1) (Fuel Cell (FC)). P ) can be authorized.

[0137] In addition, according to the current pulse control circuit (300) for a fuel cell according to one embodiment of the present invention, even if either the first switching member operation signal generating member (351) or the second switching member operation signal generating member (352) fails or malfunctions, one of the first switching member operation signal generating member (351) and the second switching member operation signal generating member (352) is selected to produce a current pulse (i) to the fuel cell (1) (Fuel Cell (FC)). P Since ) can be applied, a current pulse (i) can be stably applied to the fuel cell (1) (Fuel Cell (FC)). P ) can be authorized.

[0138] Although the present invention has been described with reference to embodiments thereof, those skilled in the art will understand that the present invention may be implemented in other specific forms without changing its technical concept or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

Claims

1. A switching member connected to the positive terminal of a fuel cell; A first resistance member connected to the switching member and having a first resistance value smaller than the load; A capacitor comprising a capacitor positive terminal and a capacitor negative terminal connected to the first resistor member; A second resistance member having a second resistance value, one end of which is connected to the positive terminal of the capacitor and the other end of which is connected to the negative terminal of the fuel cell of the fuel cell; A switching member operation signal generating member connected to a fuel cell control unit that controls the fuel cell and generates a switching member operation signal for operating the switching member; and It is connected to each of the switching member, the capacitor, and the switching member operation signal generating member, and when the switching member operation signal is input from the switching member operation signal generating member, it generates a switching member operation current and outputs it to the switching member to operate the switching member, thereby generating a current pulse (i) in the fuel cell. P A current pulse control circuit for a fuel cell comprising a switching member operation control operational amplifier (Op-amp) that allows ) to be applied.

2. In Paragraph 1, The above switching member operation control operational amplifier (Op-amp) is, A current pulse control circuit for a fuel cell comprising an operational amplifier negative terminal connected to the positive terminal of the capacitor, an operational amplifier positive terminal connected to the switching member operating signal generating member to receive the switching member operating signal, and an operational amplifier output terminal connected to the switching member to output the switching member operating current.

3. In Paragraph 2, The above switching member operation control operational amplifier (Op-amp) is, The current pulse (i) that passed through the first resistance member. P When the first voltage on the negative terminal side of the operational amplifier becomes higher than the second voltage on the positive terminal side of the operational amplifier due to the capacitor voltage of the capacitor being charged, the generation of the switching member operating current is stopped, thereby stopping the operation of the switching member and the current pulse (i P A current pulse control circuit for a fuel cell that stops the generation of ).

4. In Paragraph 3, The current pulse (i) charged in the capacitor P ) is the discharge current (i) from the capacitor through the second resistor member. D Discharged as ), and discharge current (i) discharged from the capacitor D A current pulse control circuit for a fuel cell in which the discharge time of ) is determined according to the charging capacity of the capacitor and the second resistance value of the second resistance member.

5. In Paragraph 4, The above-mentioned switching member operation signal generating member is, The current generated by the fuel cell measured by the fuel cell control unit is the reference current (i ref A current pulse control circuit for a fuel cell comprising a switching member operating signal device that generates a switching member operating signal and outputs it to the positive terminal of the operational amplifier when the value is smaller than ).

6. In Paragraph 4, The above-mentioned switching member operation signal generating member is, A current pulse control circuit for a fuel cell comprising a third resistor member having a third resistance value connected in parallel to the positive terminal of the fuel cell, and a fourth resistor member connected to the third resistor member and having a fourth resistance value smaller than the third resistance value.

7. In Paragraph 6, The above-mentioned switching member operation signal generating member is, A current pulse control circuit for a fuel cell that generates a switching member operating signal by a first voltage difference between a third voltage applied to a third resistor member and a fourth voltage applied to a fourth resistor member, and outputs the switching member operating signal to the positive terminal of an operational amplifier connected between the third resistor member and the fourth resistor member.

8. In Paragraph 7, The above-mentioned switching member operation control operational amplifier is, A current pulse control circuit for a fuel cell that generates a switching member operating current and outputs it to the switching member to operate the switching member when the second voltage on the positive terminal side of the operational amplifier due to the first voltage difference is higher than the capacitor voltage.

9. In Paragraph 4, The above-mentioned switching member operation signal generating member is, A first switching member operating signal generating member comprising a switching member operating signal device that generates a switching member operating signal and outputs it to the positive terminal of the operational amplifier when the first current of the fuel cell measured by the fuel cell control unit is smaller than the reference current, and A second switching member operating signal generating member comprising a third resistor member having a third resistance value connected in parallel to the positive terminal of the fuel cell and a fourth resistor member connected to the third resistor member and having a fourth resistance value smaller than the third resistance value, and A current pulse control circuit for a fuel cell further comprising a conversion switch member connected to the fuel cell control unit, wherein one of the first switching member operation signal generating member and the second switching member operation signal generating member is controlled by the fuel cell control unit to be connected to the positive terminal of the operational amplifier.

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