Integrated ejector, fuel cell backflow system and control method of fuel cell backflow system

Abstract

The invention provides an integrated ejector, a fuel cell backflow system and a control method thereof.The integrated ejector comprises an ejector body and further comprises an integrated outlet structure, and the integrated outlet structure is connected with the ejector body; the integrated outlet structure comprises a hydrogen outlet and a condensed water outlet, and the hydrogen outlet and the condensed water outlet are correspondingly provided with a first outlet pipeline and a second outlet pipeline; the hydrogen outlet is used for enabling the hydrogen introduced by the ejector body to enter the fuel cell electric pusher through a first outlet pipeline; and the condensate water outlet is used for converging condensate water generated by the ejector body to the water storage device through a second outlet pipeline, and the water storage device is used for discharging stored water to the gas-liquid separator connected with the water storage device under the condition that the preset water storage condition is met. Through the structural design of the one-inlet two-outlet three-way integrated ejector, the humidity of hydrogen entering the stack is remarkably reduced, the stack is prevented from being flooded, and the working performance of the formed fuel cell backflow system is better.

Description

Technical Field

[0001] The present disclosure relates to the field of fuel cell technology, and in particular to an integrated ejector, a fuel cell reflow system and a control method thereof. Background Art

[0002] During the power generation process, the fuel cell stack needs to circulate hydrogen continuously to make the reaction more complete and faster, and at the same time remove the water generated by the reaction. In the circulation loop, the mixture of hydrogen and water is discharged from the stack, removed by the gas-liquid separator, and then flows back to the ejector, where it is mixed with fresh hydrogen from the hydrogen source and enters the stack, and the cycle continues.

[0003] In the above circulation process, due to the mixture of dry hydrogen from the hydrogen source and wet hydrogen from the gas-liquid separator, it expands and dissipates heat rapidly after passing through the ejector throat, forming a large amount of liquid condensed water, which enters the fuel cell stack along the circulation loop, causing flooding, thereby affecting the performance of the fuel cell stack. Summary of the invention

[0004] The embodiments of the present disclosure at least provide an integrated ejector, a fuel cell reflow system and a control method thereof to solve the above-mentioned technical problems.

[0005] In a first aspect, an embodiment of the present disclosure provides an integrated ejector, comprising an ejector body, and an integrated outlet structure, wherein the integrated outlet structure is connected to the ejector body;

[0006] The integrated outlet structure comprises a hydrogen outlet and a condensed water outlet, and the hydrogen outlet and the condensed water outlet are respectively provided with a first outlet pipe and a second outlet pipe;

[0007] The hydrogen outlet is used to allow the hydrogen introduced by the ejector body to enter the fuel cell through the first outlet pipe;

[0008] The condensed water outlet is used to collect the condensed water generated by the ejector body to the water storage device through the second outlet pipe. The water storage device is used to discharge the stored water to the gas-liquid separator connected to the water storage device when the preset water storage conditions are met.

[0009] In a possible implementation, the first outlet pipe and the second outlet pipe are spaced apart along the circumference of the ejector body.

[0010] In a possible implementation, in the circumferential direction of the ejector body, the first outlet pipe and the second outlet pipe are arranged at an angle of 180°.

[0011] In a possible implementation, the ejector body includes a proportional valve, a throat pipe and a pressure diffuser area connected in sequence;

[0012] The proportional valve is used to introduce dry hydrogen;

[0013] The throat is used to mix the dry hydrogen introduced by the proportional valve and the wet hydrogen circulated by the hydrogen pump, and transport the mixed hydrogen to the diffusion zone;

[0014] The expansion zone is used to expand the mixed hydrogen gas and generate condensed water.

[0015] In a second aspect, the present disclosure further provides a fuel cell reflow system, comprising: the integrated ejector according to any one of the first aspect and various embodiments thereof, and further comprising: a fuel cell stack, a water storage device, a gas-liquid separator, and a hydrogen pump; the fuel cell stack, the gas-liquid separator, the hydrogen pump, and the integrated ejector are sequentially connected to form a hydrogen circulation loop;

[0016] The integrated ejector, the water storage device, and the gas-liquid separator are connected in sequence to form a condensed water discharge branch; the water storage device is used to store the condensed water flowing out of the condensed water outlet of the integrated ejector, and when the preset water storage conditions are met, the stored water is discharged into the gas-liquid separator connected to the water storage device.

[0017] In a possible implementation, a controller is further included; the water storage device includes a water reservoir and a switch valve, the switch valve is arranged between the water reservoir and the gas-liquid separator, and the switch valve is connected to the controller;

[0018] The controller is used to generate a control instruction for controlling the switch valve to open when it is determined that the preset water storage condition is met;

[0019] The switch valve is used to discharge the stored water in the water reservoir into the gas-liquid separator in response to the control instruction.

[0020] In a possible implementation manner, the controller is specifically configured to:

[0021] In response to the water stored in the water reservoir reaching a first water storage amount, generating a first control instruction for controlling the switch valve to open; and in response to the water stored in the water reservoir reaching a second water storage amount, generating a second control instruction for controlling the switch valve to close;

[0022] The switch valve is used to discharge the stored water in the water reservoir into the gas-liquid separator in response to the first control instruction; and to retain the stored water in the water reservoir in response to the second control instruction.

[0023] In a possible implementation, the water storage device further includes a first liquid level sensor and a second liquid level sensor disposed in the water reservoir, and the first liquid level sensor and the second liquid level sensor are both connected to the controller;

[0024] The first liquid level sensor is used to detect whether the water stored in the water reservoir has reached the first water storage volume;

[0025] The second liquid level sensor is used to detect whether the water stored in the water reservoir has reached the second water storage volume.

[0026] In a possible implementation manner, the controller is specifically configured to:

[0027] In response to reaching a preset water storage time, a third control instruction for controlling the switch valve to open is generated.

[0028] In a possible implementation manner, a heating structure is further included, wherein the heating structure is disposed on the water storage tank and connected to the controller;

[0029] The controller is used to control the heating structure to heat the water storage tank when it is determined that the current ambient temperature does not meet the preset temperature.

[0030] In a possible implementation, the heating structure includes a heating patch, and the heating patch is attached to an outer wall of the water reservoir to heat the water reservoir.

[0031] In a possible implementation manner, the heating structure includes a heating element provided with a heating medium, and the heating element is arranged inside the water reservoir or on an outer wall of the water reservoir;

[0032] The heating element is used to heat the water storage tank by heating the heating medium.

[0033] In a possible implementation, a purge structure is further included, wherein the purge structure is disposed on the water storage tank and connected to the controller;

[0034] The controller is used to control the purge structure to perform gas purge on the water storage tank when it is determined that a preset purge condition is met.

[0035] In a third aspect, the present disclosure further provides a control method for a fuel cell reflow system, which is applied to the fuel cell reflow system in any one of the second aspect and various embodiments; the method comprises:

[0036] Detect whether the preset water storage conditions are met;

[0037] When it is determined that the preset water storage condition is met, the stored water collected by the water storage device is discharged into a gas-liquid separator connected to the water storage device.

[0038] In a possible implementation manner, it is determined that the preset water storage condition is met in one of the following ways:

[0039] When the preset water storage time is reached, determining that the preset water storage condition is met;

[0040] When the water stored in the water storage device reaches a preset water storage amount, it is determined that the preset water storage condition is met.

[0041] In a possible implementation, it further includes:

[0042] Detect whether the current ambient temperature meets the preset temperature;

[0043] When it is determined that the current ambient temperature does not meet the preset temperature, the heating structure is controlled to heat the water storage tank.

[0044] In a possible implementation, it further includes:

[0045] Check whether the preset purge conditions are met;

[0046] When it is determined that the preset purge condition is met, the purge structure is controlled to perform gas purge on the water storage tank.

[0047] The above-mentioned integrated ejector, fuel cell reflux system and control method thereof are adopted, and the integrated outlet structure included in the integrated ejector includes a hydrogen outlet and a condensed water outlet, and the hydrogen outlet and the condensed water outlet are correspondingly provided with a first outlet pipe and a second outlet pipe; the hydrogen introduced by the ejector body can enter the fuel cell electric push through the first outlet pipe through the hydrogen outlet; the condensed water generated by the ejector body can be gathered to the water storage device through the second outlet pipe through the condensed water outlet, and the water storage device here discharges the stored water to the gas-liquid separator connected to the water storage device when the preset water storage condition is reached. It can be known that the present disclosure adopts the integrated ejector structure design of one inlet, two outlets and three ways, so that after the wet hydrogen passes through the ejector, the ejected hydrogen can be transported to the fuel cell stack through the first outlet pipe, and the generated condensed water can be transported to the water storage device through the second outlet pipe, thereby significantly reducing the humidity of the hydrogen entering the stack and preventing the stack from being flooded. The fuel cell reflux system formed in this way will be able to carry out a more benign hydrogen cycle and improve the system working performance.

[0048] Other advantages of the present disclosure will be explained in more detail in conjunction with the following description and drawings.

[0049] It should be understood that the above description is only an overview of the technical solution of the present disclosure, so that the technical means of the present disclosure can be generally understood and then implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are specifically described below with examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present disclosure and are used together with the specification to illustrate the technical solutions of the present disclosure. It should be understood that the drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope of protection. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. Moreover, the same reference numerals are used to represent the same components throughout the drawings. In the drawings:

[0051] Figure 1 A schematic diagram of a fuel cell reflow system provided by an embodiment of the present disclosure is shown;

[0052] Figure 2 A schematic structural diagram of an integrated ejector provided in an embodiment of the present disclosure is shown;

[0053] Figure 3 shows an architecture diagram of another fuel cell reflow system provided by an embodiment of the present disclosure;

[0054] Figure 4 A flow chart showing a method for controlling a fuel cell reflow system provided by an embodiment of the present disclosure is shown;

[0055] Figure 5 A schematic diagram showing a control device for a fuel cell reflow system provided by an embodiment of the present disclosure is shown;

[0056] Figure 6 A schematic diagram of an electronic device provided by an embodiment of the present disclosure is shown.

[0057] Illustration Description:

[0058] 11-integrated ejector; 22-fuel cell stack; 33-water storage device; 44-gas-liquid separator; 55-hydrogen pump; 66-hydrogen storage system; 77-proportional valve; 88-controller; 111-ejector body; 112-integrated outlet structure; 331-water reservoir; 332-switch valve; 1111-throat; 1112-diffusion zone; 1121-hydrogen outlet; 1122-condensate outlet; 1131-first outlet pipe; 1132-second outlet pipe. DETAILED DESCRIPTION

[0059] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0060] In the description of the embodiments of the present disclosure, it should be understood that terms such as "including" or "having" are intended to indicate the presence of the disclosed features, numbers, steps, behaviors, components, parts, or a combination thereof in the specification, and do not exclude the possibility of the presence of one or more other features, numbers, steps, behaviors, components, parts, or a combination thereof.

[0061] Unless otherwise specified, “ / ” means or. For example, A / B can mean A or B. The “and / or” in this article is merely a way to describe the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0062] The terms "first", "second", etc. are used only to distinguish the same or similar technical features for the convenience of description, and should not be understood as indicating or implying the relative importance or quantity of these technical features. Thus, the features defined by "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present disclosure, unless otherwise specified, the term "plurality" means two or more than two.

[0063] Research has found that during the circulation process of the fuel cell hydrogen circuit, due to the mixture of dry hydrogen from the hydrogen source and wet hydrogen from the gas-liquid separator, it quickly expands and dissipates heat after passing through the ejector throat, forming a large amount of liquid condensed water, which enters the fuel cell stack along the circulation loop, causing flooding and affecting the performance of the fuel cell stack.

[0064] In order to at least partially solve one or more of the above-mentioned problems and other potential problems, the present disclosure provides an integrated ejector, a fuel cell reflux system and a control method thereof, so as to achieve the technical purpose of reducing the humidity of the hydrogen gas entering the stack through an integrated ejector structure design with one inlet, two outlets and three ways, thereby preventing the fuel cell stack from being flooded.

[0065] In order to facilitate understanding of the embodiments of the present disclosure, the fuel cell reflow system provided by the embodiments of the present disclosure is first described in detail. Figure 1 As shown, the fuel cell reflow system mainly includes an integrated ejector 11, a fuel cell stack 22, a water storage device 33, a gas-liquid separator 44 and a hydrogen pump 55; wherein:

[0066] The fuel cell stack 22, the gas-liquid separator 44, the hydrogen pump 55 and the integrated ejector 11 are connected in sequence to form a hydrogen circulation loop; the integrated ejector 11, the water storage device 33 and the gas-liquid separator 44 are connected in sequence to form a condensed water discharge branch;

[0067] The water storage device 33 is used to store the condensed water flowing out from the condensed water outlet 1122 of the integrated ejector 11, and when a preset water storage condition is reached, the stored water is discharged into the gas-liquid separator 44 connected to the water storage device 33.

[0068] It should be noted that, in addition to the above-mentioned integrated ejector 11, fuel cell stack 22, water storage device 33, gas-liquid separator 44 and hydrogen pump 55, Figure 1 As shown, the fuel cell reflow system provided in the embodiment of the present disclosure can also be connected to the hydrogen storage system 66 and inject dry hydrogen into the integrated ejector 11 through the proportional valve 77 .

[0069] like Figure 2 As shown, the integrated ejector 11 here is an ejector including an ejector body 111 and an integrated outlet structure 112, wherein the integrated outlet structure 112 mainly includes a hydrogen outlet 1121 and a condensed water outlet 1122, the hydrogen outlet 1121 is mainly used to introduce hydrogen into the fuel cell stack 22, the condensed water outlet 1122 is mainly used to collect the generated condensed water to the water storage device 33, and connect to the gas-liquid separator 44 connected to the water storage device 33 to discharge excess water, thereby reducing the humidity of the hydrogen entering the stack and preventing the stack from being flooded.

[0070] In order to further understand the structural design of the condensate outlet 1122, Figure 1 The system architecture diagram shown further explains the working principle of the system.

[0071] The waste hydrogen (wet hydrogen) is discharged from the hydrogen outlet of the fuel cell stack 22 and passes through the gas-liquid separator 44 , and then the liquid condensed water is discharged. The high-temperature and high-humidity waste hydrogen enters the hydrogen pump 55 and then enters the integrated ejector 11 . At this time, the dry and low-temperature dry hydrogen injected through the proportional valve 77 in the ejector body 111 will be mixed with the high-temperature and high-humidity waste hydrogen in the throat. At this time, the small droplets in the waste hydrogen are affected by the low-temperature dry hydrogen to form larger water droplets. At the same time, the mixed hydrogen will continue to move forward in the ejector and enter the diffusion zone. At this time, the mixed gas expands and dissipates heat, and the water droplets in the mixed gas form liquid condensed water. The condensed water gathers inside the hydrogen pipeline, and the gathered condensed water enters the water storage device 33 through the condensed water outlet 1122. When the preset water storage conditions (such as the preset water storage time, etc.) are met, the stored water is discharged to the gas-liquid separator 44 connected to the water storage device 33. That is, the liquid condensed water will enter the water storage area of ​​the gas-liquid separator 44, and the water entering the water storage area of ​​the gas-liquid separator 44 will be subsequently discharged to the tail discharge together with the water separated by the gas-liquid separator 44.

[0072] At the same time, the hydrogen ejected from the ejector body 111 will enter the fuel cell stack 22 through the hydrogen outlet 1121 .

[0073] Considering the key role of the water storage device 33 in realizing the condensed water reflux, in the actual process of realizing water storage and drainage, it is necessary to further combine the control logic. Figure 3 The system control architecture diagram shown further illustrates the fuel cell reflow system provided by the embodiment of the present disclosure.

[0074] like Figure 3 As shown, the fuel cell reflow system here also includes a controller 88; the water storage device 33 mainly includes a water reservoir 331 and a switch valve 332, the switch valve 332 is arranged between the water reservoir 331 and the gas-liquid separator 44, and the switch valve 332 is connected to the controller 88; wherein:

[0075] The controller 88 is used to generate a control instruction for controlling the switch valve 332 to open when it is determined that the preset water storage condition is met;

[0076] The switch valve 332 is used to discharge the water stored in the water reservoir 331 into the gas-liquid separator 44 in response to a control instruction.

[0077] On the one hand, the embodiment of the present disclosure can determine whether the preset water storage conditions are met based on the preset water storage time, and on the other hand, it can also determine whether the preset water storage conditions are met based on the water storage conditions in the water storage tank 331. In addition, it can also be various other related water storage conditions that are conducive to realizing the opening and closing state adjustment of the switch valve 332.

[0078] In practical applications, the opening and closing status of the switch valve 332 in the embodiment of the present disclosure can be opened and closed by setting a fixed time, or a liquid level switch (such as a liquid level sensor, etc.) can be added to the water tank 331, which will open when the liquid level in the water tank 331 reaches a certain height and close after a fixed time.

[0079] like Figure 3 The example is an implementation scheme of using two liquid level sensors to realize liquid level detection, wherein the two liquid level sensors include a first liquid level sensor for detecting whether the water stored in the water reservoir 331 reaches a first water storage volume and a second liquid level sensor for detecting whether the water stored in the water reservoir 331 reaches a second water storage volume.

[0080] The first liquid level sensor serves as a high liquid level sensor (HL). When the controller 88 determines that the water stored in the water reservoir 331 has reached a first water storage volume through the detection result of the high liquid level sensor, it can determine that the high liquid level has been reached, thereby generating a first control instruction for controlling the opening of the switch valve 332, and the water stored in the water reservoir 331 is discharged into the gas-liquid separator 44 according to the first control instruction; the second liquid level sensor serves as a low liquid level sensor (LL). When the controller 88 determines that the water stored in the water reservoir 331 has reached a second water storage volume through the detection result of the low liquid level sensor, it can determine that the low liquid level has been reached, thereby generating a first control instruction for controlling the closing of the switch valve 332, and the water can be retained in the water reservoir 331 according to the second control instruction.

[0081] In actual applications, the above-mentioned two liquid level sensors can be set in the water reservoir 331 and linked with the switch valve 332. In this way, when the liquid level reaches the high liquid level switch height, the signal is transmitted to the controller 88 to control the switch valve 332 to open for drainage. When the liquid level reaches the low liquid level switch height, the signal is transmitted to the controller 88 to control the switch valve 332 to close.

[0082] In addition to realizing the opening and closing of the switch valve 332 based on the detection results of the above-mentioned liquid level sensor, the embodiment of the present disclosure can also determine whether the preset water storage conditions are met by whether the preset water storage time (such as 5 minutes) is reached, and then control the opening and closing state of the switch valve 332. For the linkage control of the switch valve 332, controller 88 and gas-liquid separator 44, please refer to the above description, which will not be repeated here.

[0083] It should be noted that the switch valve 332 here can be a solenoid valve, a mechanical gravity valve, or other valves. In order to prevent freezing at low temperatures, the switch valve 332 in the embodiment of the present disclosure can be an electrically heated switch valve.

[0084] In order to further ensure the normal operation of the system under low temperature conditions, the embodiment of the present disclosure may also be provided with a heating structure, mainly considering that when there is condensed water in the water reservoir 331, it will freeze under low temperature conditions (when the temperature is below zero). In order to prevent freezing at low temperatures, when it is determined that the ambient temperature is lower than a certain temperature, the water reservoir 331 may be heated for a certain period of time when the engine is started to ensure that there is no freezing inside and the water inside exists in the form of fluid.

[0085] Specifically, the heating structure here is connected to the controller 88. When the controller 88 determines that the current ambient temperature does not meet the preset temperature, it can control the heating structure to heat the water storage tank 331.

[0086] On the one hand, the heating structure here can be a heating patch, which is attached to the outer wall of the water reservoir 331 to heat the water reservoir 331.

[0087] On the other hand, the heating structure here can be a heating element provided with a heating medium, which is arranged inside the water reservoir 331 or on the outer wall of the water reservoir 331, and the water reservoir 331 can be heated by heating the heating medium. In practical applications, it can be achieved by connecting to a thermal management system.

[0088] In order to further reduce the adverse effects that excess moisture may have on the system, a purge structure may be provided in the embodiment of the present disclosure. The purge structure is connected to the controller 88. The controller 88 may control the purge structure to purge the water storage tank 331 when it is determined that the preset purge conditions are met.

[0089] In a specific application, for example, it may be determined that a preset purge condition is met when the system is shut down, or it may be other purge conditions, which are not specifically limited here.

[0090] The purge structure may be disposed on the water reservoir 331, for example, gas may be directly purged into the water reservoir 331, or components such as a purge pipe may be combined to further increase the purge area, thereby avoiding the generation of a flow dead zone and reducing the accumulation of condensed water.

[0091] In summary, the fuel cell reflux system provided by the embodiment of the present disclosure can effectively reduce the liquid condensed water entering the fuel cell stack, prevent the fuel cell stack from being flooded, make the system run more smoothly, improve performance, and also increase the service life of the fuel cell stack.

[0092] Considering the key role of the integrated ejector 11 provided in the embodiment of the present disclosure in the above-mentioned fuel cell reflow system, the following will be combined with Figure 2 The working principle of the integrated ejector 11 provided in the embodiment of the present disclosure is further demonstrated and explained.

[0093] like Figure 2 As shown, the integrated ejector 11 provided in the embodiment of the present disclosure mainly includes an ejector body 111 and an integrated outlet structure 112, and the integrated outlet structure 112 is connected to the ejector body 111; wherein:

[0094] The integrated outlet structure 112 includes a hydrogen outlet 1121 and a condensed water outlet 1122 , and the hydrogen outlet 1121 and the condensed water outlet 1122 are correspondingly provided with a first outlet pipe 1131 and a second outlet pipe 1132 ;

[0095] The hydrogen outlet 1121 is used to allow the hydrogen introduced by the ejector body 111 to enter the fuel cell through the first outlet pipe 1131;

[0096] The condensate outlet 1122 is used to collect the condensate generated by the ejector body 111 to the water storage device 33 through the second outlet pipe 1132. The water storage device 33 is used to discharge the stored water to the gas-liquid separator 44 connected to the water storage device 33 when the preset water storage conditions are met.

[0097] The integrated ejector 11 provided in the embodiment of the present disclosure is an ejector with an integrated outlet structure 112. The end of the integrated ejector 11 adopts a one-inlet and two-outlet three-way structure, so that after the wet hydrogen passes through the ejector, the hydrogen enters the fuel cell stack 22 along the upward outlet pipe (i.e., the first outlet pipe 1131), and the generated condensed water enters the water storage device 33 along the downward outlet pipe (i.e., the second outlet pipe 1132) into the water storage device 33, thereby reducing the humidity of the hydrogen entering the stack and preventing the stack from being flooded.

[0098] In addition, the water stored in the water storage tank 331 can also be discharged into the water storage area of ​​the gas-liquid separator 44 through the switch valve 332, which is easy to operate and has stronger applicability.

[0099] In one embodiment, the first outlet pipe 1131 and the second outlet pipe 1132 are arranged at intervals along the circumference of the ejector body 111, and it is ensured as much as possible that the pipe through which hydrogen passes is arranged at the top and the pipe through which condensed water passes is arranged at the bottom.

[0100] In practical applications, in the circumferential direction of the ejector body 111, the first outlet pipe 1131 and the second outlet pipe 1132 are arranged at an angle of 180°. Figure 2 As shown, the first outlet pipe 1131 is vertically upward, and the second outlet pipe 1132 is vertically downward.

[0101] like Figure 2 The exemplary ejector body 111 mainly includes a proportional valve 77, a throat 1111 and a diffuser 1112 connected in sequence;

[0102] The proportional valve 77 is used to introduce dry hydrogen;

[0103] The throat 1111 is used to mix the dry hydrogen introduced by the proportional valve and the wet hydrogen circulated by the hydrogen pump 55, and transport the mixed hydrogen to the diffusion zone;

[0104] The pressure diffusion zone 1112 is used to expand the mixed hydrogen gas and generate condensed water.

[0105] Here, the dry and low-temperature dry hydrogen injected through the proportional valve 77 in the ejector body 111 will be mixed with the high-temperature and high-humidity waste hydrogen in the throat 1111. At this time, the small droplets in the waste hydrogen will be affected by the low-temperature dry hydrogen to form larger water droplets. At the same time, the mixed hydrogen will continue to move forward in the ejector and enter the expansion zone 1112. At this time, the mixed gas expands and dissipates heat, and the water droplets in the mixed hydrogen form liquid condensed water. The condensed water gathers inside the hydrogen pipeline, and the gathered condensed water enters the water storage device 33 through the condensed water outlet 1122. The specific drainage process will not be elaborated here.

[0106] It should be noted that the proportional valve 77 is a part of the ejector body 111. In addition, it can also be set separately (such as in the attached Figure 1 ), and no specific limitation is made here.

[0107] The integrated ejector 11 designed in this way can effectively reduce the amount of liquid condensed water entering the fuel cell stack, prevent the fuel cell stack from being flooded, and make the entire fuel cell reflux system run more smoothly, improve performance, and also increase the service life of the fuel cell stack.

[0108] Based on the fuel cell reflow system provided by the embodiment of the present disclosure, a control method for a fuel cell reflow system disclosed by the embodiment of the present disclosure will be introduced in detail below. The execution subject of the control method for the fuel cell reflow system provided by the embodiment of the present disclosure is generally an electronic device with certain computing capabilities, and the electronic device includes, for example: a terminal device or other processing device, and the terminal device can be a user equipment (User Equipment, UE), a personal digital assistant (Personal Digital Assistant, PDA), a vehicle-mounted device, a wearable device, etc. In the case of application to a fuel cell system, the electronic device here can also be, for example, a fuel cell system controller, and the following will also be illustrated with this execution subject.

[0109] In some possible implementations, the control method of the fuel cell reflow system may be implemented by a processor calling computer-readable instructions stored in a memory.

[0110] See also Figure 4, which shows a flow chart of a control method of a fuel cell reflow system provided by an embodiment of the present disclosure, the method comprises the following steps S401-S402:

[0111] S401: Detect whether the preset water storage condition is met;

[0112] S402: When it is determined that the preset water storage condition is met, the water collected by the water storage device is discharged into a gas-liquid separator connected to the water storage device.

[0113] For the determination of the preset water storage conditions, please refer to the above description, which will not be repeated here; for the linkage operation between the water storage device and the gas-liquid separator, please refer to the above description, which will not be repeated here.

[0114] In a possible implementation manner, the embodiment of the present disclosure may determine that the preset water storage condition is reached in one of the following ways:

[0115] When the preset water storage time is reached, determining that the preset water storage condition is reached;

[0116] When the water stored in the water storage device reaches a preset water storage amount, it is determined that the preset water storage condition is met.

[0117] In a possible implementation, the control method of the fuel cell reflow system provided in the embodiment of the present disclosure further includes:

[0118] Detect whether the current ambient temperature meets the preset temperature;

[0119] When it is determined that the current ambient temperature does not meet the preset temperature, the heating structure is controlled to heat the water storage tank.

[0120] The heating process will not be described in detail here, please refer to the above description for details.

[0121] In a possible implementation, the control method of the fuel cell reflow system provided in the embodiment of the present disclosure further includes:

[0122] Check whether the preset purge conditions are met;

[0123] When it is determined that the preset purge condition is reached, the purge structure is controlled to perform gas purge on the water storage tank.

[0124] The purging process will not be described in detail here, please refer to the above description for details.

[0125] In the description of this specification, the description with reference to the terms "some possible embodiments", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure, and the above terms do not necessarily represent the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0126] About the method flow chart of the embodiment of the present disclosure, some operations are described as different steps performed in a certain order. Such a flow chart is illustrative and not restrictive. Some steps described in this article can be grouped together and performed in a single operation, or some steps can be divided into multiple sub-steps, and some steps can be performed in an order different from that shown in this article. The various steps shown in the flow chart can be implemented in any way by any circuit structure and / or tangible mechanism (for example, by software running on a computer device, hardware (for example, a logical function implemented by a processor or a chip), etc., and / or any combination thereof).

[0127] Those skilled in the art will appreciate that, in the method described in the above specific implementation, the writing order of each step does not mean a strict execution order, and the specific execution order of each step should be determined by its function and possible internal logic.

[0128] Based on the same inventive concept, a control device corresponding to the control method of the fuel cell recirculation system is also provided in the embodiment of the present disclosure. Since the principle of solving the problem by the device in the embodiment of the present disclosure is similar to the above-mentioned control method in the embodiment of the present disclosure, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be repeated.

[0129] Reference Figure 5 FIG. 5 is a schematic diagram of a control device for a fuel cell reflow system provided by an embodiment of the present disclosure, the device comprising: a detection module 501 and a control module 502; wherein,

[0130] A detection module 501 is used to detect whether a preset water storage condition is reached;

[0131] The control module 502 is used to discharge the stored water collected by the water storage device into a gas-liquid separator connected to the water storage device when it is determined that the preset water storage condition is met.

[0132] In a possible implementation manner, it is determined that the preset water storage condition is met in one of the following ways:

[0133] When the preset water storage time is reached, determining that the preset water storage condition is reached;

[0134] When the water stored in the water storage device reaches a preset water storage amount, it is determined that the preset water storage condition is met.

[0135] In a possible implementation, the control module 502 is further configured to:

[0136] Detect whether the current ambient temperature meets the preset temperature;

[0137] When it is determined that the current ambient temperature does not meet the preset temperature, the heating structure is controlled to heat the water storage tank.

[0138] In a possible implementation, the control module 502 is further configured to:

[0139] Check whether the preset purge conditions are met;

[0140] When it is determined that the preset purge condition is reached, the purge structure is controlled to perform gas purge on the water storage tank.

[0141] It should be noted that the device in the embodiment of the present disclosure can implement each process of the embodiment of the aforementioned method and achieve the same effects and functions, which will not be repeated here.

[0142] The present disclosure also provides an electronic device, such as Figure 6 6 is a schematic diagram of the structure of an electronic device provided by an embodiment of the present disclosure, including: a processor 601, a memory 602, and a bus 603. The memory 602 stores machine-readable instructions executable by the processor 601 (for example, Figure 5 When the electronic device is running, the processor 601 communicates with the memory 602 via the bus 603, and when the machine-readable instructions are executed by the processor 601, the following processing is performed:

[0143] Detect whether the preset water storage conditions are met;

[0144] When it is determined that the preset water storage conditions are met, the water collected by the water storage device is discharged into a gas-liquid separator connected to the water storage device.

[0145] The embodiment of the present disclosure also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the control method of the fuel cell reflow system described in the above method embodiment are executed. The storage medium can be a volatile or non-volatile computer-readable storage medium.

[0146] The embodiments of the present disclosure also provide a computer program product, which carries a program code. The instructions included in the program code can be used to execute the steps of the control method of the fuel cell reflow system described in the above method embodiment. Please refer to the above method embodiment for details, which will not be repeated here.

[0147] The computer program product may be implemented in hardware, software or a combination thereof. In one optional embodiment, the computer program product is implemented as a computer storage medium. In another optional embodiment, the computer program product is implemented as a software product, such as a software development kit (SDK).

[0148] Each embodiment in the present disclosure is described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and computer-readable storage medium embodiments, since they are basically similar to the method embodiments, their descriptions are simplified, and the relevant parts can be referred to the partial description of the method embodiments.

[0149] The apparatus, equipment and computer-readable storage medium provided in the embodiments of the present disclosure correspond one-to-one to the method. Therefore, the apparatus, equipment and computer-readable storage medium also have similar beneficial technical effects as the corresponding methods. Since the beneficial technical effects of the methods have been described in detail above, the beneficial technical effects of the apparatus, equipment and computer-readable storage medium will not be repeated here.

[0150] It should be understood by those skilled in the art that the embodiments of the present disclosure can be implemented in the form of methods and apparatus (devices or systems), or computer-readable storage media. Therefore, the present disclosure can be implemented in a complete hardware implementation, a complete software implementation, or an implementation that combines software and hardware. Moreover, the present disclosure can be implemented in the form of a computer-readable storage medium implemented on one or more computer-usable storage media (including but not limited to disk storage, read-only compact disk storage (CD-ROM), optical storage, etc.) containing computer-usable program code.

[0151] The present disclosure is described with reference to the flowchart and / or block diagram of the method, device (equipment or system) and computer-readable storage medium according to the embodiment of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, and the combination of the process and / or box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0152] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device, wherein the instruction device implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0153] These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0154] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0155] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash memory (Flash RAM). The memory is an example of a computer-readable medium.

[0156] Computer-readable media include permanent and non-permanent, removable and non-removable media, and information storage can be achieved by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer-readable storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory, read-only memory, electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. In addition, although the operations of the disclosed method are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in this specific order, or that all the operations shown must be performed to achieve the desired results. In addition, some steps can be omitted, multiple steps can be combined into one step, and / or one step can be decomposed into multiple sub-steps.

[0157] Although the spirit and principle of the present disclosure have been described above with reference to several specific embodiments, it should be understood that the present disclosure is not limited to the disclosed specific embodiments, and the division of various aspects does not mean that the features in these aspects cannot be combined. The present disclosure is intended to cover various modifications and equivalent arrangements included in the spirit and scope of the attached claims.

Claims

1. An integrated ejector, characterized in that: It includes an ejector body and an integrated outlet structure, wherein the integrated outlet structure is connected to the ejector body; The integrated outlet structure comprises a hydrogen outlet and a condensed water outlet, and the hydrogen outlet and the condensed water outlet are respectively provided with a first outlet pipe and a second outlet pipe; The hydrogen outlet is used to allow the hydrogen introduced by the ejector body to enter the fuel cell through the first outlet pipe; The condensed water outlet is used to collect the condensed water generated by the ejector body to the water storage device through the second outlet pipe. The water storage device is used to discharge the stored water to the gas-liquid separator connected to the water storage device when the preset water storage conditions are met.

2. The integrated ejector according to claim 1, characterized in that: The first outlet pipe and the second outlet pipe are arranged at intervals along the circumference of the ejector body.

3. The integrated ejector according to claim 2, characterized in that: In the circumferential direction of the ejector body, the first outlet pipe and the second outlet pipe are arranged at an angle of 180°.

4. The integrated ejector according to any one of claims 1 to 3, characterized in that: The ejector body comprises a proportional valve, a throat pipe and a pressure diffusion area connected in sequence; The proportional valve is used to introduce dry hydrogen; The throat is used to mix the dry hydrogen introduced by the proportional valve and the wet hydrogen circulated by the hydrogen pump, and transport the mixed hydrogen to the diffusion zone; The expansion zone is used to expand the mixed hydrogen gas and generate condensed water.

5. A fuel cell reflow system, characterized in that: include: The integrated ejector according to any one of claims 1 to 4, further comprising: a fuel cell stack, a water storage device, a gas-liquid separator and a hydrogen pump; The fuel cell stack, the gas-liquid separator, the hydrogen pump and the integrated ejector are connected in sequence to form a hydrogen circulation loop; The integrated ejector, the water storage device, and the gas-liquid separator are connected in sequence to form a condensed water discharge branch; the water storage device is used to store the condensed water flowing out of the condensed water outlet of the integrated ejector, and when the preset water storage conditions are met, the stored water is discharged into the gas-liquid separator connected to the water storage device.

6. The fuel cell reflow system according to claim 5, characterized in that: It also includes a controller; the water storage device includes a water reservoir and a switch valve, the switch valve is arranged between the water reservoir and the gas-liquid separator, and the switch valve is connected to the controller; The controller is used to generate a control instruction for controlling the switch valve to open when it is determined that the preset water storage condition is met; The switch valve is used to discharge the stored water in the water reservoir into the gas-liquid separator in response to the control instruction.

7. The fuel cell reflow system according to claim 6, characterized in that: The controller is specifically used for: In response to the water stored in the water reservoir reaching a first water storage amount, generating a first control instruction for controlling the switch valve to open; and in response to the water stored in the water reservoir reaching a second water storage amount, generating a second control instruction for controlling the switch valve to close; The switch valve is used to discharge the water stored in the water reservoir into the gas-liquid separator in response to the first control instruction; and, retaining stored water in the water reservoir in response to the second control instruction.

8. The fuel cell reflow system according to claim 7, characterized in that: The water storage device further comprises a first liquid level sensor and a second liquid level sensor disposed in the water storage tank, wherein the first liquid level sensor and the second liquid level sensor are both connected to the controller; The first liquid level sensor is used to detect whether the water stored in the water reservoir has reached the first water storage volume; The second liquid level sensor is used to detect whether the water stored in the water reservoir has reached the second water storage volume.

9. The fuel cell reflow system according to claim 6, characterized in that: The controller is specifically used for: In response to reaching a preset water storage time, a third control instruction for controlling the switch valve to open is generated.

10. The fuel cell recirculation system according to any one of claims 6 to 9, characterized in that: It also includes a heating structure, which is arranged on the water reservoir and connected to the controller; The controller is used to control the heating structure to heat the water storage tank when it is determined that the current ambient temperature does not meet the preset temperature.

11. The fuel cell recirculation system according to claim 10, characterized in that: The heating structure comprises a heating patch, and the heating patch is arranged on the outer wall of the water reservoir to heat the water reservoir.

12. The fuel cell recirculation system according to claim 10, characterized in that: The heating structure comprises a heating element provided with a heating medium, and the heating element is arranged inside the water reservoir or on the outer wall of the water reservoir; The heating element is used to heat the water storage tank by heating the heating medium.

13. The fuel cell recirculation system according to any one of claims 6 to 9, characterized in that: It also includes a purge structure, which is arranged on the water storage tank and connected to the controller; The controller is used to control the purge structure to perform gas purge on the water storage tank when it is determined that a preset purge condition is met.

14. A control method for a fuel cell reflow system, characterized in that: A fuel cell reflow system applied to any one of claims 5 to 13; the method comprising: Detect whether the preset water storage conditions are met; When it is determined that the preset water storage condition is met, the stored water collected by the water storage device is discharged into a gas-liquid separator connected to the water storage device.

15. The control method of the fuel cell recirculation system according to claim 14, characterized in that: Determine that the preset water storage condition is met in one of the following ways: When the preset water storage time is reached, determining that the preset water storage condition is met; When the water stored in the water storage device reaches a preset water storage amount, it is determined that the preset water storage condition is met.

16. The control method of the fuel cell recirculation system according to claim 15, characterized in that: Also includes: Detect whether the current ambient temperature meets the preset temperature; When it is determined that the current ambient temperature does not meet the preset temperature, the heating structure is controlled to heat the water storage tank.

17. The control method of the fuel cell recirculation system according to claim 15, characterized in that: Also includes: Check whether the preset purge conditions are met; When it is determined that the preset purge condition is met, the purge structure is controlled to perform gas purge on the water storage tank.

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