Fuel cell system

Abstract

Provided is a fuel cell system capable of stably securing a concentration of hydrogen gas required for fuel cell power generation. According to one embodiment of the present disclosure, a fuel cell system (1) is provided with: a first pressure sensor (P1) that measures the pressure between a hydrogen storage alloy tank (41) and an injector (42) in a hydrogen gas supply path (31); and a control unit (13) that controls the exhaust / drain valve (51) when the value measured by the first pressure sensor (P1) is equal to or less than a predetermined pressure (PA). The control unit (13) performs control so that the number of opening / closing operations per unit time of the exhaust / drain valve (51) increases when the number of opening / closing operations per unit time is higher than a predetermined pressure (PA) than the value measured by the first pressure sensor (P1).

Description

Technical Field

[0001] This disclosure relates to a fuel cell system having a fuel cell that generates electricity by accepting a supply of fuel gas and oxidant gas. Background Technology

[0002] Patent document 1 discloses a fuel cell system that supplies hydrogen released from a hydrogen storage alloy tank (hydrogen storage alloy) to the fuel cell to generate electricity.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2002-184418 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] In the fuel cell system disclosed in Patent Document 1, when the temperature of the hydrogen storage alloy tank is low, the hydrogen ejection pressure of the hydrogen in the hydrogen storage alloy tank (i.e., the pressure of the hydrogen released from the hydrogen storage alloy tank) becomes low, thereby reducing the amount of hydrogen supplied to the fuel cell, which may fail to ensure the concentration of hydrogen required for fuel cell power generation.

[0008] Therefore, this disclosure was made to solve the above-mentioned problems, and its purpose is to provide a fuel cell system that can stably ensure the concentration of hydrogen required for fuel cell power generation.

[0009] Solution for solving the problem

[0010] One aspect of this disclosure, undertaken to address the aforementioned problems, is a fuel cell system comprising: a fuel cell; a hydrogen supply passage for supplying hydrogen to the fuel cell; a hydrogen storage container filled with a hydrogen storage alloy for releasing the hydrogen to the hydrogen supply passage; a hydrogen supply device disposed in the hydrogen supply passage for supplying the hydrogen released from the hydrogen storage container to the fuel cell; a hydrogen exhaust passage for discharging hydrogen exhaust gas discharged from the fuel cell to the outside; and an exhaust control valve disposed in the hydrogen exhaust passage for controlling the discharge of hydrogen exhaust gas to the outside. The fuel cell system is characterized by having at least one of a pressure measuring unit and a container temperature measuring unit, and a control unit, wherein the pressure measuring unit measures the hydrogen supply... The pressure between the hydrogen storage container and the hydrogen supply device in the passage, the temperature of the hydrogen storage container measured by the container temperature measuring unit, the control unit controlling the exhaust control valve, and controlling the exhaust control valve in such a way that when the measured value of the pressure measuring unit is below a specified pressure, the control unit increases the number of opening and closing actions of the exhaust control valve per unit time compared to the number of opening and closing actions when the measured value of the pressure measuring unit is above the specified pressure, and / or controlling the exhaust control valve in such a way that when the measured value of the container temperature measuring unit is below a specified container temperature, the control unit increases the number of opening and closing actions of the exhaust control valve per unit time compared to the number of opening and closing actions when the measured value of the container temperature measuring unit is above the specified container temperature.

[0011] According to this method, when the temperature of the hydrogen storage container decreases, the hydrogen ejection pressure in the hydrogen storage alloy tank decreases, resulting in low pressure between the hydrogen storage container and the hydrogen supply device in the hydrogen supply path, the number of opening and closing operations of the exhaust control valve per unit time is increased. This improves the removal efficiency of nitrogen and water generated during power generation in the fuel cell, thereby increasing the hydrogen concentration within the fuel cell. Therefore, a stable supply of hydrogen at the concentration required for fuel cell power generation can be ensured.

[0012] Furthermore, the increased power generation from the fuel cell heats it up, allowing heat to be transferred to the hydrogen storage container. This heating of the storage container increases the ejection pressure of hydrogen, thereby raising the pressure between the storage container and the hydrogen supply device in the hydrogen supply path. Consequently, the amount of hydrogen supplied to the fuel cell increases, ensuring a stable concentration of hydrogen required for fuel cell power generation.

[0013] In the above method, it is preferred that the control unit controls the valve by increasing the number of opening and closing actions by shortening the closing time of the exhaust control valve.

[0014] According to this method, by increasing the number of opening and closing actions of the exhaust control valve, shortening the valve closing time makes it more difficult to discharge hydrogen from the fuel cell compared to shortening the opening time, thus increasing the hydrogen concentration inside the fuel cell.

[0015] In the above-described manner, it is preferable to include: a fan that blows heat generated by the fuel cell toward the hydrogen storage container; and a battery temperature measuring unit that measures the temperature of the fuel cell. The control unit controls the fan to operate when the measured value of the battery temperature measuring unit is above a predetermined battery temperature, and to stop the fan when the measured value of the battery temperature measuring unit is below the predetermined battery temperature.

[0016] According to this method, when the fuel cell is warming up and its temperature is high, a fan is activated to transfer the heat generated by the fuel cell to the hydrogen storage container. This improves the efficiency of hydrogen release from the storage container, thereby increasing the amount of hydrogen supplied from the storage container to the fuel cell.

[0017] On the other hand, when the fuel cell is not warming up and its temperature is low, the fan is stopped, preventing the supply of cold air to the hydrogen storage container. This prevents a decrease in the efficiency of hydrogen release from the storage container. Therefore, it suppresses a reduction in the amount of hydrogen supplied from the storage container to the fuel cell.

[0018] The effects of the invention

[0019] According to the fuel cell system disclosed herein, a stable concentration of hydrogen gas required for fuel cell power generation can be ensured. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the fuel cell system (open cathode system) of this embodiment.

[0021] Figure 2 This is a characteristic graph showing the temperature, hydrogen pressure, and hydrogen concentration of the hydrogen storage alloy tank.

[0022] Figure 3 This diagram shows the FC stack, hydrogen storage alloy tank, and battery configured inside the casing.

[0023] Figure 4 This is a flowchart illustrating the control procedures performed in this embodiment.

[0024] Figure 5 This is a structural diagram of a modified fuel cell system (a cathode-enclosed system). Detailed Implementation

[0025] The embodiments of the fuel cell system disclosed herein will be described.

[0026] (Structure of a fuel cell system)

[0027] like Figure 1 As shown, the fuel cell system 1 of this embodiment includes an FC stack 11 (air-cooled FC stack), a battery 12 (secondary battery), a hydrogen system 21, and an air cooling system 22. Furthermore, the FC stack 11 is an example of the "fuel cell" disclosed herein.

[0028] The FC stack 11 generates electricity by receiving a supply of fuel gas and an oxidant gas. In this embodiment, the fuel gas is hydrogen, and the oxidant gas is air. That is, the FC stack 11 generates electricity by receiving a supply of hydrogen from the hydrogen system 21 and a supply of air from the air cooling system 22. The electricity generated by the FC stack 11 is then supplied to the battery 12, an inverter (not shown), and a motor.

[0029] Battery 12 is connected to FC stack 11 and is charged with the power generated by FC stack 11. In addition, battery 12 supplies power to inverter and motor (not shown).

[0030] The hydrogen system 21 is located on the anode side of the FC stack 11. The hydrogen system 21 has a hydrogen supply passage 31 and a hydrogen exhaust passage 32.

[0031] Hydrogen supply passage 31 is a passage for supplying hydrogen from the hydrogen storage alloy tank 41 to the FC stack 11. Hydrogen exhaust passage 32 is a passage for discharging hydrogen (i.e., hydrogen exhaust) discharged from the FC stack 11.

[0032] In addition, such as Figure 1 As shown, the hydrogen system 21 has a hydrogen storage alloy tank 41 in the hydrogen supply passage 31, and from the side of the hydrogen storage alloy tank 41, there are a first pressure sensor P1, an injector 42 and a second pressure sensor P2 in sequence.

[0033] Furthermore, the hydrogen storage alloy tank 41 is an example of the "hydrogen storage container" of this disclosure. Additionally, the first pressure sensor P1 is an example of the "pressure measuring unit" of this disclosure. Furthermore, the injector 42 is an example of the "hydrogen supply device" of this disclosure.

[0034] The hydrogen storage alloy tank 41 is a container filled with a hydrogen storage alloy that has the properties of absorbing and releasing hydrogen. That is, the hydrogen storage alloy tank 41 is filled with a hydrogen storage alloy, which can release hydrogen to the hydrogen supply passage 31 and can absorb hydrogen from a hydrogen tank not shown in the figure.

[0035] The first pressure sensor P1 measures the pressure between the hydrogen storage alloy tank 41 and the injector 42 in the hydrogen supply passage 31 (i.e., the ejection pressure of the hydrogen storage alloy tank 41). The injector 42 is a device that supplies hydrogen by injecting it from the hydrogen storage alloy tank 41 to the downstream FC stack 11. The second pressure sensor P2 measures the outlet pressure of the injector 42 (i.e., the injection pressure).

[0036] Additionally, the hydrogen system 21 is equipped with an exhaust drain valve 51 in the hydrogen exhaust gas discharge passage 32. This exhaust drain valve 51 is used to control the discharge of hydrogen exhaust gas and moisture to the outside and to cut off the discharge. Furthermore, the exhaust drain valve 51 is an example of the "exhaust control valve" of this disclosure.

[0037] On the other hand, an air cooling system 22 is provided on the cathode side of the FC stack 11. The air cooling system 22 includes an air supply passage 61, an air exhaust passage 62, and a fan 63.

[0038] Air supply passage 61 is a passage for supplying air from outside the fuel cell system 1 to the FC stack 11. Air exhaust passage 62 is a passage for discharging air discharged from the FC stack 11 (i.e., air exhaust).

[0039] Fan 63 supplies air to FC stack 11 via air supply passage 61 and discharges air exhaust from FC stack 11 via air exhaust passage 62.

[0040] In this embodiment, the fan 63 supplies air to the FC reactor 11 via the air supply passage 61, thereby not only using the air to generate electricity from the FC reactor 11, but also cooling the FC reactor 11. Figure 1 The fuel cell system 1 shown is a cathode-open system that uses air supplied to the FC stack 11 by the fan 63 as cooling gas for the FC stack 11.

[0041] Furthermore, the fuel cell system 1 includes a first temperature sensor T1, a second temperature sensor T2, and a third temperature sensor T3. The first temperature sensor T1 measures the temperature of the FC stack 11. The second temperature sensor T2 measures the temperature of the hydrogen storage alloy tank 41. The third temperature sensor T3 measures the temperature of the battery 12. The first temperature sensor T1 is an example of the "battery temperature measuring unit" of this disclosure. The second temperature sensor T2 is an example of the "container temperature measuring unit" of this disclosure.

[0042] Furthermore, the fuel cell system 1 includes a control unit 13. The control unit 13 is, for example, a device having a processing unit such as a CPU, a ROM storing control programs and control data processed by the CPU, a storage unit such as RAM used as various operating areas for control processing, and an input / output interface unit. Moreover, the control unit 13 performs various controls on the fuel cell system 1 according to the control programs stored in the storage unit.

[0043] In this embodiment, the control unit 13 controls various components of the fuel cell system 1, including the injector 42, the exhaust / drain valve 51, the fan 63, and the cooling fan 71 (described later). Furthermore, the control unit 13 obtains the measured value of the injection pressure of the hydrogen storage alloy tank 41 from the first pressure sensor P1 and the measured value of the outlet pressure of the injector 42 from the second pressure sensor P2. Additionally, the control unit 13 obtains the measured value of the temperature of the FC stack 11 from the first temperature sensor T1, the measured value of the temperature of the hydrogen storage alloy tank 41 from the second temperature sensor T2, and the measured value of the temperature of the battery 12 from the third temperature sensor T3.

[0044] (The role of fuel cell systems)

[0045] In the fuel cell system 1 with the above-described structure, the hydrogen supplied to the FC stack 11 from the hydrogen supply passage 31 is used for power generation in the FC stack 11, and then discharged as hydrogen exhaust gas from the FC stack 11 to the outside of the fuel cell system 1 via the hydrogen exhaust gas discharge passage 32. Similarly, the air supplied to the FC stack 11 from the air supply passage 61 is used for power generation in the FC stack 11, and then discharged as air exhaust gas from the FC stack 11 to the outside of the fuel cell system 1 via the air exhaust gas discharge passage 62.

[0046] In addition, the power generated by the FC stack 11 is either fed into the battery 12 or supplied to an inverter or motor (not shown).

[0047] (Regarding countermeasures for ensuring the required concentration of hydrogen for FC reactor power generation)

[0048] The ejection pressure of hydrogen (i.e., the pressure of hydrogen released from the hydrogen storage alloy tank 41) varies depending on the temperature of the tank. For example... Figure 2 As shown, the lower the temperature of the hydrogen storage alloy tank 41 (represented by 0°C, 20°C, 40°C, and 60°C in the figure), the lower the hydrogen ejection pressure (represented as "hydrogen pressure" in the figure). For example, when the temperature of the hydrogen storage alloy tank 41 is below 20°C, the hydrogen ejection pressure decreases to 40 kPaG to 150 kPaG. Moreover, when the hydrogen ejection pressure of the hydrogen storage alloy tank 41 decreases, the amount of hydrogen supplied to the FC reactor 11 decreases, which may prevent the FC reactor 11 from obtaining the hydrogen concentration required for power generation.

[0049] Therefore, in this embodiment, a countermeasure is adopted to stably ensure the concentration of hydrogen required for power generation by the FC reactor 11, regardless of the temperature of the hydrogen storage alloy tank 41. Specifically, when the hydrogen ejection pressure of the hydrogen storage alloy tank 41 is low due to its low temperature, the heat generated when the FC reactor 11 is in a warm-up state is used to heat the hydrogen storage alloy tank 41, thereby increasing the temperature of the hydrogen storage alloy tank 41 and thus increasing the hydrogen ejection pressure. Moreover, this increases the amount of hydrogen supplied to the FC reactor 11, ensuring the concentration of hydrogen required for power generation by the FC reactor 11.

[0050] More specifically, such as Figure 3 As shown, in this embodiment, the FC stack 11, the hydrogen storage alloy tank 41, and the battery 12 are arranged and modularly configured within a housing 81 formed in a surrounding manner. Furthermore, a cooling fan 71 is pre-installed near the FC stack 11, and the hydrogen storage alloy tank 41 is positioned across the FC stack 11 from the cooling fan 71. Moreover, the cooling fan 71 is an example of a "fan" as described in this disclosure.

[0051] Then, the control unit 13 proceeds. Figure 4 Control over the displayed content. For example... Figure 4 As shown, the control unit 13 determines whether the measured value of the first pressure sensor P1 (i.e., the measured value of the hydrogen ejection pressure of the hydrogen storage alloy tank 41) is below the specified pressure PA (e.g., 60 kPaG) (step S1).

[0052] Then, if the measured value of the first pressure sensor P1 is below the specified pressure PA (step S1: "Yes"), the control unit 13 first controls the outlet pressure of the injector 42 to the target pressure (e.g., 60 kPaG) (step S2).

[0053] Next, the control unit 13 causes the exhaust and drain valve 51 to open frequently (e.g., every 200ms). 500ms close) action (step S3). Additionally, "200ms open" "500ms closing" refers to the period during which the valve is repeatedly in the open state for 200ms and in the closed state for 500ms.

[0054] Thus, when the measured value of the first pressure sensor P1 is below the specified pressure PA and the hydrogen ejection pressure of the hydrogen storage alloy tank 41 is low, the control unit 13 controls the system in the following manner: while controlling the ejection pressure of the injector 42 to the target pressure, the exhaust drain valve 51 is frequently operated so that the number of opening and closing operations of the exhaust drain valve 51 per unit time is increased compared to the number of opening and closing operations when the measured value of the first pressure sensor P1 is above the specified pressure PA.

[0055] Then, at this time, the control unit 13 controls the process by shortening the closing time of the exhaust drain valve 51 compared to the normal control process described later in step S7, thereby increasing the number of opening and closing operations of the exhaust drain valve 51 per unit time. This improves the efficiency of removing nitrogen and water (based on the exhaust drain valve 51) generated during power generation in the FC reactor 11, thereby increasing the hydrogen concentration within the FC reactor 11.

[0056] Furthermore, as a variation, when the measured value of the second temperature sensor T2 is below a specified temperature TB (e.g., 10°C), the control unit 13 may control the number of opening and closing operations of the exhaust / drain valve 51 per unit time to increase the number of opening and closing operations compared to the case where the measured value of the second temperature sensor T2 is above the specified temperature TB. Here, the specified temperature TB is an example of the "specified container temperature" of this disclosure.

[0057] Next, the control unit 13 determines whether the measured value of the first temperature sensor T1 is above a specified temperature TA (e.g., 30°C) (step S4). Furthermore, the specified temperature TA is an example of the "specified battery temperature" of this disclosure.

[0058] Then, if the measured value of the first temperature sensor T1 is above the specified temperature TA (step S4: "Yes"), the control unit 13 activates the cooling fan 71 (step S5).

[0059] When the temperature measured by the first temperature sensor T1 is above the specified temperature TA and the temperature of the FC stack 11 is high, the cooling fan 71 is activated. Then, the cooling fan 71 blows the heat generated by the FC stack 11 during its warm-up state towards the hydrogen storage alloy tank 41. This allows the heat generated by the FC stack 11 during its warm-up state to be used to heat the hydrogen storage alloy tank 41. Therefore, the hydrogen ejection pressure from the hydrogen storage alloy tank 41 can be increased.

[0060] Furthermore, in this embodiment, since the FC stack 11, the hydrogen storage alloy tank 41, and the battery 12 are arranged inside the housing 81, the heat generated when the FC stack 11 is in a warm-up state is used to increase the temperature inside the housing 81, thereby enabling the hydrogen storage alloy tank 41 and the battery 12 to be heated simultaneously.

[0061] On the other hand, if the measured value of the first temperature sensor T1 is less than the specified temperature TA (step S4: "No"), the control unit 13 stops the cooling fan 71 (step S6).

[0062] Thus, if the measured value of the first temperature sensor T1 is less than the specified temperature TA and the temperature of the FC stack 11 is low, the cooling fan 71 is stopped. This prevents the hydrogen storage alloy tank 41 from being cooled by the air supplied by the cooling fan 71.

[0063] In addition, if the measured value of the first pressure sensor P1 is greater than the specified pressure PA (step S1: "No"), the control unit 13 performs normal control (step S7).

[0064] In this way, when the hydrogen ejection pressure of the hydrogen in the hydrogen storage alloy tank 41 is high, the control unit 13 controls the outlet pressure of the injector 42 to the target pressure (e.g., 60 kPaG) under normal control, and causes the exhaust drain valve 51 to repeatedly operate in an open state for 200 ms and a closed state for 10 sec. Based on the SOC (i.e., State of Charge) of the battery 12, the cooling fan 71 is controlled to perform power generation (on-demand power generation) and power generation shutdown (intermittent shutdown).

[0065] Furthermore, as a variation, this embodiment can also be applied to Figure 5 The fuel cell system 2 shown is a cathode-closed system, as illustrated. Figure 5 As shown, it has an air system 122 and a cooling system 123.

[0066] An air system 122 is located on the cathode side of the FC stack 11. The air system 122 includes an air supply passage 161 and an air exhaust passage 162.

[0067] Air supply passage 161 is a passage for supplying air from outside the fuel cell system 2 to the FC stack 11. Air exhaust passage 162 is a passage for discharging air that is not used for power generation, i.e., air exhaust, from the FC stack 11.

[0068] The air system 122 includes an air compressor 171 and an inlet air valve 172 in the air supply passage 161. The air compressor 171 is a device for supplying air to the FC stack 11. The inlet air valve 172 is located downstream of the air compressor 171 and is a valve that controls the flow rate of the air supplied to the FC stack 11.

[0069] Additionally, the air system 122 includes an outlet air valve 173 in the exhaust air passage 162. The outlet air valve 173 is a valve that controls the flow rate of exhaust air discharged from the FC stack 11 into the exhaust air passage 162.

[0070] Cooling system 123 is a system for cooling FC reactor 11, and includes cooling water passage 201 and cooling fan 202. Cooling water passage 201 is a passage for the flow of cooling water. In addition, cooling fan 202 is a device for cooling the cooling water flowing through cooling water passage 201.

[0071] Furthermore, in such a fuel cell system 2, the control unit 13 controls the air compressor 171, the inlet air valve 172, the outlet air valve 173, and the cooling fan 202.

[0072] In the fuel cell system 2 with the above-described structure, in the air system 122, the air supplied to the FC stack 11 from the air supply passage 161 is used for power generation in the FC stack 11 and is then discharged to the outside as exhaust gas from the FC stack 11 via the exhaust gas discharge passage 162.

[0073] (Effects of this implementation method)

[0074] As described above, according to this embodiment, when the measured value of the first pressure sensor P1 is below a specified pressure PA, the control unit 13 controls the number of opening and closing operations of the exhaust and drain valve 51 per unit time to increase the number of opening and closing operations compared to the number of opening and closing operations when the measured value of the first pressure sensor P1 is above the specified pressure PA.

[0075] Thus, when the temperature of the hydrogen storage alloy tank 41 decreases, resulting in a lower hydrogen ejection pressure and consequently a lower pressure between the hydrogen storage alloy tank 41 and the ejector 42 in the hydrogen supply passage 31, the number of opening and closing operations of the exhaust drain valve 51 per unit time is increased. This improves the efficiency of removing nitrogen and water (based on the exhaust drain valve 51) generated during power generation in the FC reactor 11, thereby increasing the hydrogen concentration within the FC reactor 11. Therefore, a stable concentration of hydrogen required for power generation in the FC reactor 11 can be ensured.

[0076] Furthermore, as the FC reactor 11 heats up due to the promotion of power generation, the heat generated by the FC reactor 11 can be transferred to the hydrogen storage alloy tank 41. Therefore, the hydrogen storage alloy tank 41 is heated, resulting in a higher hydrogen ejection pressure, which increases the pressure between the hydrogen storage alloy tank 41 and the ejector 42 in the hydrogen supply passage 31. Consequently, the amount of hydrogen supplied to the FC reactor 11 increases, thus ensuring a stable concentration of hydrogen required for power generation by the FC reactor 11.

[0077] In addition, the control unit 13 controls the system by increasing the number of opening and closing actions by shortening the closing time of the exhaust and drain valve 51.

[0078] In this way, by increasing the number of opening and closing actions of the exhaust and drain valve 51, the closing time of the exhaust and drain valve 51 is shortened, making it more difficult to discharge hydrogen from the FC stack 11 compared to shortening the opening time, thus increasing the concentration of hydrogen in the FC stack 11.

[0079] Furthermore, if the measured value of the first temperature sensor T1 is above the specified temperature TA, the control unit 13 activates the cooling fan 71. On the other hand, if the measured value of the first temperature sensor T1 is below the specified temperature TA, the control unit 13 stops the cooling fan 71.

[0080] Thus, when the FC reactor 11 is in a warm-up state and its temperature is high, the cooling fan 71 is activated to transfer the heat generated by the FC reactor 11 to the hydrogen storage alloy tank 41. As a result, the hydrogen storage alloy tank 41 is heated, and its temperature rises, thereby increasing the efficiency of hydrogen release from the hydrogen storage alloy tank 41. Therefore, the amount of hydrogen supplied from the hydrogen storage alloy tank 41 to the FC reactor 11 can be increased.

[0081] On the other hand, when the FC reactor 11 is not warmed up and its temperature is low, the cooling fan 71 is stopped, and cold air is not supplied to the hydrogen storage alloy tank 41. Therefore, the hydrogen storage alloy tank 41 is not cooled, thus preventing a decrease in the hydrogen release efficiency from the hydrogen storage alloy tank 41. Therefore, a reduction in the amount of hydrogen supplied from the hydrogen storage alloy tank 41 to the FC reactor 11 can be prevented.

[0082] Furthermore, the above-described embodiments are merely illustrative and do not limit the scope of this disclosure in any way. Of course, various improvements and modifications can be made without departing from its spirit.

[0083] Explanation of reference numerals in the attached figures

[0084] 1.2 Fuel Cell System

[0085] 11 FC heap

[0086] 12 Storage batteries

[0087] 13 Control Department

[0088] 21 Hydrogen System

[0089] 31 Hydrogen supply pathway

[0090] 32 Hydrogen exhaust gas discharge path

[0091] 41 Hydrogen storage alloy tank

[0092] 42 Injectors

[0093] 51. Exhaust and drain valve

[0094] 71 Cooling Fan

[0095] 81 Casing

[0096] P1 First pressure sensor

[0097] PA specified pressure

[0098] T1 First Temperature Sensor

[0099] T2 Second Temperature Sensor

[0100] TA specifies the temperature

[0101] TB specified temperature

Claims

1. A fuel cell system, comprising: Fuel cells; A hydrogen supply passage for supplying hydrogen to the fuel cell; A hydrogen storage container filled with a hydrogen storage alloy, which releases hydrogen into the hydrogen supply passage; A hydrogen supply device, configured in the hydrogen supply passage, supplies hydrogen released from the hydrogen storage container to the fuel cell; A hydrogen exhaust passage for discharging hydrogen exhaust gas emitted from the fuel cell to the outside; and An exhaust control valve, configured in the hydrogen exhaust passage, is used to control the discharge of hydrogen exhaust gas to the outside. The fuel cell system is characterized in that... It includes at least one of a pressure measuring unit and a container temperature measuring unit, as well as a control unit. The pressure measuring unit measures the pressure between the hydrogen storage container and the hydrogen supply device in the hydrogen supply passage, and the container temperature measuring unit measures the temperature of the hydrogen storage container. The control unit controls the exhaust control valve. When the pressure measured by the pressure measuring unit is below a specified pressure, the control unit controls the number of opening and closing actions of the exhaust control valve per unit time to increase the number of opening and closing actions compared to the number of opening and closing actions when the pressure measured by the pressure measuring unit is above the specified pressure, and / or When the measured value of the container temperature measuring unit is below the specified container temperature, the control unit controls the number of opening and closing operations of the exhaust control valve per unit time to increase the number of opening and closing operations compared to the number of opening and closing operations when the measured value of the container temperature measuring unit is above the specified container temperature.

2. The fuel cell system according to claim 1, characterized in that, The control unit controls the system by increasing the number of opening and closing actions by shortening the closing time of the exhaust control valve.

3. The fuel cell system according to claim 1 or 2, characterized in that, have: A fan blows heat generated by the fuel cell toward the hydrogen storage container; and The battery temperature measuring unit measures the temperature of the fuel cell. The control unit controls the fan. If the measured value of the battery temperature measuring unit is above a specified battery temperature, the control unit activates the fan. If the measured value of the battery temperature measuring unit is lower than the specified battery temperature, the control unit stops the fan.

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