Fuel Cell-Based Control Method and Device and Well Site Production Enhancement Method

Abstract

The present disclosure provides a control method and device based on a fuel cell and a well field production enhancement method. The control method includes: selecting at least one from a plurality of first fuel cells to form a fuel cell stack; and supplying gas to the fuel cell stack. Each of the first fuel cells forming the fuel cell stack is a second fuel cell. Supplying gas to the fuel cell stack includes: distributing gas with a first gas consumption amount to the fuel cell stack; and distributing the gas with the first gas consumption amount to each second fuel cell according to a battery gas distribution ratio to respectively distribute corresponding second gas consumption amounts of gas. This control method can achieve higher efficiency, lower emissions, and quieter operation. It can also select a certain number of fuel cells to be started from the candidate fuel cells according to requirements, and distribute corresponding amounts of gas to the started fuel cells in proportion. By controlling the number of started fuel cells and the gas distribution amount, the effect of outputting a stable voltage and a target power can be achieved.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to a control method and apparatus based on a fuel cell and a well site stimulation method. Background Art

[0002] Earlier stimulation operation equipment was powered by a diesel engine. First, the energy conversion efficiency of the diesel engine is relatively low (less than 35%), so the cost required to drive the equipment is relatively high. Moreover, due to the working conditions requirements, the stimulation operation equipment needs to operate continuously, and there is a phenomenon of refueling a single device multiple times during the operation process, which poses a safety hazard. With the popularization of electric power applications in recent years, electric drive equipment has gradually been applied to well sites due to its advantages such as low drive cost, strong continuous operation ability, and comfortable operation environment.

[0003] A fuel cell is a chemical device that directly converts the chemical energy of a fuel into electrical energy, also known as an electrochemical generator. It is the fourth generation of power generation technology after hydraulic power generation, thermal power generation, and nuclear power generation. Since a fuel cell converts the Gibbs free energy part of the chemical energy of a fuel into electrical energy through an electrochemical reaction and is not restricted by the Carnot cycle effect, its efficiency is high. In addition, a fuel cell uses fuel and oxygen as raw materials; at the same time, there are no mechanical transmission components, so there is no noise pollution and extremely few harmful gases are emitted. Thus, from the perspective of saving energy and protecting the ecological environment, fuel cells are the most promising power generation technology. Summary of the Invention

[0004] At least one embodiment of the present disclosure provides a control method and apparatus based on a fuel cell and a well site stimulation method.

[0005] At least one embodiment of the present disclosure provides a control method based on a fuel cell, including: selecting at least one from a plurality of first fuel cells to form a fuel cell stack; and supplying gas to the fuel cell stack; wherein each first fuel cell forming the fuel cell stack is a second fuel cell, and supplying gas to the fuel cell stack includes: distributing gas with a first gas consumption amount to the fuel cell stack; and distributing the gas with the first gas consumption amount to each of the second fuel cells according to a cell gas distribution ratio to obtain a corresponding second gas consumption amount of gas.

[0006] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, distributing the gas with the first gas consumption amount to each of the second fuel cells according to the battery gas distribution ratio includes: obtaining the power conversion efficiency of each second fuel cell in the fuel cell stack to obtain the ratio of the power conversion efficiencies of the second fuel cells in the fuel cell stack; using the inverse of the ratio of the power conversion efficiencies of the second fuel cells in the fuel cell stack as the battery gas distribution ratio to distribute the gas with the corresponding second gas consumption amount to each of the second fuel cells.

[0007] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, obtaining the power conversion efficiency of each second fuel cell in the fuel cell stack includes: periodically calling the gas consumption amount and the power at the output end of each second fuel cell in the fuel cell stack to obtain the power conversion efficiency of each second fuel cell.

[0008] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, distributing the gas with the first gas consumption amount to the fuel cell stack includes: obtaining the total first gas demand amount of the fuel cell stack per unit time, where the total first gas demand amount is the total gas demand amount required by all the second fuel cells in the fuel cell stack per unit time; distributing the gas with the first gas consumption amount greater than or equal to the total first gas demand amount to the fuel cell stack.

[0009] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, obtaining the total first gas demand amount of the fuel cell stack per unit time includes: summing up the rated gas demand amounts of each second fuel cell in the fuel cell stack based on at least one second fuel cell in the fuel cell stack and the rated gas demand amount of each second fuel cell to obtain the total first gas demand amount at the initial moment of gas distribution.

[0010] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, obtaining the total first gas demand amount of the fuel cell stack per unit time further includes: adjusting the second gas consumption amount in real time and adjusting the total first gas demand amount in real time according to the power conversion efficiency of each second fuel cell.

[0011] For example, a control method based on a fuel cell provided by at least one embodiment of the present disclosure further includes: in response to gas distribution for the fuel cell stack, recording the gas reflux pressure, flow rate, and gas consumption amount during the gas distribution process to obtain gas distribution record information.

[0012] For example, a control method based on a fuel cell provided by at least one embodiment of the present disclosure further includes: in response to gas distribution shutdown information, stopping gas distribution for the fuel cell stack and outputting the gas distribution record information.

[0013] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, selecting at least one from a plurality of first fuel cells to form a fuel cell stack includes: selecting two or more from the plurality of first fuel cells to supply power to a target device; connecting two or more of the second fuel cells in parallel and / or in series to form the fuel cell stack.

[0014] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, the target device includes one or more well site stimulation modules.

[0015] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, the well site stimulation module includes fracturing equipment and / or sand mixing equipment.

[0016] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, selecting two or more from the plurality of first fuel cells to supply power to a target device includes: obtaining power distribution information according to the power demand of the target device, where the power distribution information includes: the required voltage and required power for the target device, and the number of output terminals of the plurality of second fuel cells, the voltage of the corresponding output terminals, and the power of the corresponding output terminals; obtaining the maximum power of a single second fuel cell; and obtaining the number of second fuel cells forming the fuel cell stack according to the power distribution information and the maximum power of a single second fuel cell.

[0017] For example, a control method based on a fuel cell provided by at least one embodiment of the present disclosure further includes: distributing power to the target device, where distributing power to the target device includes: in response to power distribution start information, distributing power to the target device according to the power distribution information to achieve power supply to the target device, and periodically recording data to obtain a power distribution database.

[0018] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, distributing power to the target device further includes: starting an energy storage device to supply energy for starting the fuel cell stack and / or charging the fuel cell stack.

[0019] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, distributing power to the target device further includes: in response to power distribution shutdown information, stopping power distribution to the target device and outputting the power distribution database.

[0020] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, in response to forming the fuel cell stack by paralleling a plurality of the second fuel cells, it further includes: detecting the second fuel cells of the fuel cell stack, wherein detecting the second fuel cells of the fuel cell stack includes: obtaining an electric energy conversion threshold; comparing the electric energy conversion efficiency of each second fuel cell in the fuel cell stack with the electric energy conversion threshold; in response to the electric energy conversion efficiency of each second fuel cell in the fuel cell stack not exceeding the range of the electric energy conversion threshold, obtaining the average value of the electric energy conversion efficiencies of all the second fuel cells in the fuel cell stack; in response to the electric energy conversion efficiency of at least one second fuel cell in the fuel cell stack exceeding the range of the electric energy conversion threshold, it includes:

[0021] comparing the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold with the upper limit of the electric energy conversion threshold,

[0022] in response to the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold being greater than the upper limit of the electric energy conversion threshold, outputting a warning message, and in response to the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold being less than the lower limit of the electric energy conversion threshold, shutting down and marking the corresponding second fuel cell and enabling an equal number of other first fuel cells to be used as the second fuel cell.

[0023] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, obtaining the electric energy conversion threshold includes: obtaining the electric energy conversion threshold through an external input, or obtaining the electric energy conversion threshold according to the average value of the electric energy conversion efficiencies of all the second fuel cells in the fuel cell stack that have been obtained.

[0024] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, in response to forming the fuel cell stack by paralleling a plurality of the second fuel cells, it further includes: predicting the compliance situation of the second fuel cells, where predicting the compliance situation of the second fuel cells includes: in response to the power distribution information, obtaining the power output demand of each second fuel cell in the fuel cell stack; according to the power output demand of the second fuel cell and the power conversion efficiency of the second fuel cell, obtaining the target gas consumption of the fuel cell, where the target gas consumption is the amount of gas required to consume when the output end of the second fuel cell outputs the power of the power output demand at a set power conversion efficiency; calling the second gas consumption of the gas allocated to the second fuel cell, and comparing the second gas consumption with the target gas consumption; in response to the second gas consumption of the gas allocated to the second fuel cell being not less than the target gas consumption, outputting a normal prediction message, and in response to the second gas consumption of the gas allocated to the second fuel cell being less than the target gas consumption, outputting an abnormal prediction message.

[0025] For example, in a control method based on a fuel cell provided by at least one embodiment of the present disclosure, in response to the output of the abnormal prediction message, it further includes: in response to obtaining replacement information, shutting down the corresponding second fuel cell and enabling an equal number of other first fuel cells to be used as the second fuel cell, and in response to not obtaining replacement information, continuously monitoring the power at the output end of the corresponding second fuel cell and outputting the monitoring result.

[0026] For example, a control method based on a fuel cell provided by at least one embodiment of the present disclosure further includes: monitoring the gas stock of the current gas source, where monitoring the gas stock of the current gas source includes: providing an operation plan for the target device, where the operation plan includes the target operation time of the target device and the required power of the target device; according to the operation plan, obtaining the total amount of electric energy required by the target device within the operation plan; according to the total amount of electric energy, obtaining the total second gas demand of the fuel cell stack for gas; comparing the stored amount of gas in the current gas source with the total second gas demand; in response to the stored amount being not less than the total second gas demand, operating normally, and in response to the stored amount being less than the total second gas demand, enabling other gas sources and / or sending a warning message.

[0027] For example, in a control method based on a fuel cell provided in at least one embodiment of the present disclosure, in response to forming the fuel cell stack by paralleling a plurality of the second fuel cells, it further includes: monitoring the real-time gas supply situation of the second fuel cells, where monitoring the real-time gas supply situation of the second fuel cells includes: periodically invoking the power conversion efficiency and the power at the output end of each second fuel cell in the fuel cell stack to obtain the actual required gas volume of the second fuel cell; comparing the actual required gas volume of the second fuel cell with the second gas usage of the gas that is actually allocated to the second fuel cell in real time; in response to the second gas usage of the gas that is actually allocated to the second fuel cell in real time being not less than the actual required gas volume, operating normally; in response to the second gas usage of the gas that is actually allocated to the second fuel cell in real time being less than the actual required gas volume, monitoring the valve opening degree of the corresponding gas distribution valve configured to supply gas to the second fuel cell; where, in response to the valve opening degree of the corresponding gas distribution valve having been opened to the maximum valve opening degree, outputting real-time gas supply abnormal information, shutting down the corresponding second fuel cell, and enabling an equal number of other first fuel cells to be used as the second fuel cell, and, in response to the valve opening degree of the corresponding gas distribution valve not having been opened to the maximum valve opening degree, outputting valve opening degree increase control information to increase the valve opening degree of the corresponding gas distribution valve, so that the second gas usage of the gas allocated to the second fuel cell is not less than the actual required gas volume.

[0028] For example, a control method based on a fuel cell provided in at least one embodiment of the present disclosure further includes: monitoring the pressure situation of the gas distribution pipeline for the gas distribution, where monitoring the pressure situation of the gas distribution pipeline for the gas distribution includes: obtaining pressure threshold information; periodically invoking the pressure data of the gas distribution pipeline and the pressure threshold information, and comparing the pressure data with the pressure threshold information; in response to the pressure data not exceeding the range of the pressure threshold information, operating normally; in response to the pressure data exceeding the range of the pressure threshold information, outputting control information for reducing the pressure or outputting control information for increasing the pressure; where, in response to the pressure data being greater than the upper limit of the pressure threshold information, outputting control information for reducing the pressure to reduce the pressure data of the gas distribution pipeline, so that the pressure data is within the range of the pressure threshold information, and, in response to the pressure data being less than the lower limit of the pressure threshold information, outputting control information for increasing the pressure to increase the pressure data of the gas distribution pipeline, so that the pressure data is within the range of the pressure threshold information.

[0029] For example, in a fuel cell-based control method provided by at least one embodiment of the present disclosure, it further includes: monitoring the water heat dissipation cycle of the second fuel cell, wherein monitoring the water heat dissipation cycle of the second fuel cell includes: obtaining the set operating temperature range of each second fuel cell; detecting the real-time temperature of the water in the second fuel cell through a water temperature sensor built in the second fuel cell; comparing the real-time temperature of the water in the second fuel cell with the set operating temperature range; in response to the real-time temperature being lower than the set operating temperature range, circulating water back to the second fuel cell through a circulation water pump via a humidifier, and in response to the real-time temperature not being lower than the set operating temperature range, circulating water through a circulation water pump via a radiator to the humidifier and then back to the second fuel cell.

[0030] For example, a fuel cell-based control method provided by at least one embodiment of the present disclosure further includes: monitoring the water volume of the circulating water of the fuel cell stack, wherein monitoring the water volume of the circulating water of the fuel cell stack includes: obtaining the total amount of the circulating water of the fuel cell stack by monitoring the water volume of the circulating water corresponding to each second fuel cell in the fuel cell stack; comparing the total amount of the circulating water of the fuel cell stack with the normal working water demand of the fuel cell stack; in response to the total amount of the circulating water of the fuel cell stack being within the range of the normal working water demand of the fuel cell stack, circulating the circulating water back to the second fuel cell through a circulation water pump via a humidifier; in response to the total amount of the circulating water of the fuel cell stack being less than the lower limit of the normal working water demand of the fuel cell stack, outputting a warning message; in response to the total amount of the circulating water of the fuel cell stack being higher than the upper limit of the normal working water demand of the fuel cell stack, draining the fuel cell stack until it is monitored that the total amount of the circulating water of the fuel cell stack is equal to the normal working water demand of the fuel cell stack and then stopping draining.

[0031] At least one embodiment of the present disclosure further provides a well site production enhancement method based on a fuel cell, including: selecting at least one from a plurality of first fuel cells to form a fuel cell stack to supply power to a well site production enhancement module; and supplying gas to the fuel cell stack; wherein each first fuel cell forming the fuel cell stack is a second fuel cell, and supplying gas to the fuel cell stack includes: distributing gas with a first gas consumption amount to the fuel cell stack; and distributing the gas with the first gas consumption amount to each second fuel cell according to a battery gas distribution ratio to obtain a corresponding second gas consumption amount of gas.

[0032] For example, in a well site production enhancement method based on a fuel cell provided by at least one embodiment of the present disclosure, the well site production enhancement module includes a fracturing device and / or a sand mixing device.

[0033] At least one embodiment of the present disclosure provides a control device based on a fuel cell, including:

[0034] A plurality of first fuel cells, including at least one first fuel cell selected to form a fuel cell stack, wherein each first fuel cell forming the fuel cell stack is a second fuel cell; a first controller configured to select at least one from the plurality of first fuel cells to form the fuel cell stack; a gas distribution module, wherein the gas distribution module includes: a gas distribution pipeline including a main gas distribution pipeline and at least one branch gas distribution pipeline for diverting the main gas distribution pipeline, wherein the main gas distribution pipeline is configured to transport gas for a first gas consumption of the fuel cell stack; at least one gas distribution valve provided on the at least one branch gas distribution pipeline and configured to distribute gas to each of the second fuel cells in the fuel cell stack; a second controller configured to control the valve opening degree of each of the at least one gas distribution valve to control the distribution of the gas with the first gas consumption to each of the second fuel cells according to the battery gas distribution ratio of the fuel cell stack to respectively distribute corresponding second gas consumption of gas.

[0035] For example, in a control device based on a fuel cell provided by at least one embodiment of the present disclosure, the at least one gas distribution valve corresponds to the at least one branch gas distribution pipeline one by one and the at least one gas distribution valve corresponds to the second fuel cell of the fuel cell stack one by one.

[0036] For example, in a control device based on a fuel cell provided by at least one embodiment of the present disclosure, there are two or more second fuel cells in the fuel cell stack, and the two or more second fuel cells are connected in parallel and / or in series to form the fuel cell stack to supply power to a target device.

[0037] For example, a control device based on a fuel cell provided by at least one embodiment of the present disclosure further includes a power distribution module, wherein an input end of the power distribution module is connected to an output end of each of the second fuel cells in the fuel cell stack and an output end of the power distribution module is connected to the target device to distribute power to the target device.

[0038] For example, in a control device based on a fuel cell provided by at least one embodiment of the present disclosure, the target device includes one or more well site stimulation modules.

[0039] For example, a control device based on a fuel cell provided by at least one embodiment of the present disclosure further includes an energy storage device, wherein the energy storage device includes one or more energy storage units and the energy storage device is configured to: supply energy for starting the fuel cell stack and / or be charged by the fuel cell stack.

[0040] For example, a control device based on a fuel cell provided by at least one embodiment of the present disclosure further includes a gas source unit, wherein the main gas distribution pipeline of the gas distribution module is connected to the gas source unit.

[0041] For example, a control device based on a fuel cell provided by at least one embodiment of the present disclosure further includes a buffer unit, wherein the buffer unit is arranged on the main gas distribution pipeline.

[0042] For example, in a control device based on a fuel cell provided by at least one embodiment of the present disclosure, the buffer unit includes a gas storage tank.

[0043] For example, a control device based on a fuel cell provided by at least one embodiment of the present disclosure further includes a water treatment unit and a filtration unit, wherein the output end of the water treatment unit is connected to the filtration unit, and the output end of the filtration unit is respectively connected to the target device and the fuel cell stack, so as to collect and adjust the temperature of the water separated by the filtration unit and supply it to the target device and the fuel cell stack. Description of the Drawings

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0045] Figure 1 It is a flowchart of a control method based on a fuel cell provided by some embodiments of the present disclosure;

[0046] Figure 2 It is a flowchart of gas distribution for a fuel cell stack provided by some embodiments of the present disclosure;

[0047] Figure 3 Provided by some embodiments of the present disclosure Figure 2 It is a flowchart of step S22;

[0048] Figure 4 Provided by some embodiments of the present disclosure Figure 2 It is a flowchart of step S21;

[0049] Figure 5 Provided by some embodiments of the present disclosure Figure 1 It is a flowchart of step S1;

[0050] Figure 6 Provided by some embodiments of the present disclosure Figure 5 It is a flowchart of step S11;

[0051] Figure 7 Flow chart for detecting the second fuel cell of a fuel cell stack provided by some embodiments of the present disclosure;

[0052] Figure 8 Flow chart for predicting the compliance of the second fuel cell provided by some embodiments of the present disclosure;

[0053] Figure 9 Flow chart for monitoring the gas inventory of the current gas source provided by some embodiments of the present disclosure;

[0054] Figure 10 Flow chart for monitoring the real-time gas supply of the second fuel cell provided by some embodiments of the present disclosure;

[0055] Figure 11 Flow chart for monitoring the pressure of the gas distribution pipeline for gas distribution provided by some embodiments of the present disclosure;

[0056] Figure 12 Flow chart for monitoring the water heat dissipation cycle of the second fuel cell provided by some embodiments of the present disclosure;

[0057] Figure 13 Flow chart for monitoring the water volume of the circulating water of the fuel cell stack provided by some embodiments of the present disclosure;

[0058] Figure 14 Schematic block diagram of a control device based on a fuel cell provided by some embodiments of the present disclosure;

[0059] Figure 15 Module composition diagram of a control device based on a fuel cell provided by some embodiments of the present disclosure;

[0060] Figure 16 Composition diagram of multiple first fuel cells provided by some embodiments of the present disclosure; and

[0061] Figure 17 Module composition diagram for gas distribution to a fuel cell stack provided by some embodiments of the present disclosure. Detailed implementation manners

[0062] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0063] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present disclosure have the same meaning as commonly understood by those of ordinary skill in the art to which the present disclosure pertains. It should also be understood that terms such as those defined in a general dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in the embodiments of the present disclosure.

[0064] The "first", "second" and similar terms used in the embodiments of the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Similar terms such as "a", "an" or "the" do not denote a quantity limitation, but mean that there is at least one. Similarly, words such as "comprising" or "including" mean that the elements or items appearing before the word cover the elements or items listed after the word and their equivalents, without excluding other elements or items. Terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Flowcharts are used in the embodiments of the present disclosure to illustrate the steps of the methods according to the embodiments of the present disclosure. It should be understood that the steps before or after do not necessarily need to be carried out precisely in order. On the contrary, they can be carried out in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or one or several steps can be removed from these processes.

[0065] At present, the power supply of electric drive equipment is usually in the form of grid power supply. This method is more suitable in places close to the grid and towns, but not suitable for some sites and operating equipment in remote mountainous areas, because the form of long-distance power transmission from the grid will cause a large amount of infrastructure costs, such as most well sites and the corresponding well site electric drive equipment; and electric energy itself belongs to secondary energy, and there are a large number of energy losses in the process of energy conversion and long-distance transportation, resulting in waste of resources. In addition, for some high-power and high-power-consuming stimulation operation equipment, the ordinary power grid is difficult to meet the power consumption requirements of these equipment.

[0066] At present, most fuel cell stacks are in the order of hundreds of kilowatts. When the power of the fuel cell is too large, it is difficult to ensure the consistency of a single fuel cell, resulting in unstable output voltage of the fuel cell stack, and it is difficult for the supporting equipment and components of the fuel cell to meet the requirements of power distribution and gas distribution when the fuel cell works at high power.

[0067] At least one embodiment of the present disclosure provides a control method based on a fuel cell, including: selecting at least one from a plurality of first fuel cells to form a fuel cell stack; and supplying gas to the fuel cell stack; wherein each of the first fuel cells forming the fuel cell stack is a second fuel cell, and supplying gas to the fuel cell stack includes: distributing gas with a first gas consumption amount to the fuel cell stack; and distributing the gas with the first gas consumption amount to each of the second fuel cells according to a cell gas distribution ratio to obtain a corresponding second gas consumption amount of gas.

[0068] At least one embodiment of the present disclosure further provides a control device corresponding to the above control method.

[0069] The control method or control device based on a fuel cell according to the above embodiments of the present disclosure uses a fuel cell to supply power, which can obtain higher efficiency, lower emissions, and quieter operation than using a diesel engine. Moreover, a certain number of fuel cells can be selected from the candidate fuel cells according to requirements, and gas with a corresponding amount is distributed to the selected fuel cells according to a ratio. By controlling the number of selected fuel cells and the gas distribution amount, the effect of outputting a stable voltage and a target power can be achieved.

[0070] For example, in at least one embodiment of the present disclosure, when the control method based on a fuel cell is applicable to well stimulation, the formed fuel cell stack is used to supply power to a well stimulation module to implement a well stimulation method based on a fuel cell.

[0071] The embodiments and examples of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0072] Figure 1 It is a flowchart of a control method based on a fuel cell provided for some embodiments of the present disclosure.

[0073] For example, as Figure 1 shown, the control method based on a fuel cell provided by at least one embodiment of the present disclosure includes step S1 and step S2.

[0074] Step S1: Select at least one from a plurality of first fuel cells to form a fuel cell stack.

[0075] Step S2: Supply gas to the fuel cell stack.

[0076] For example, at least one of the multiple first fuel cells is selected to form a fuel cell stack. The first fuel cell that forms the fuel cell stack is referred to as a second fuel cell. The number of second fuel cells included in the fuel cell stack is denoted as n, where n is an integer and n≥1. For example, the number of first fuel cells to be selected is greater than the number of second fuel cells that form the fuel cell stack. In addition to the first fuel cells selected to form the fuel cell stack, the multiple first fuel cells may also include at least one unselected first fuel cell. For example, at different times, the fuel cell stack may include different second fuel cells, that is, the first fuel cells can be selected as needed. For example, at different times, the number of second fuel cells in the fuel cell stack may be the same or different. For example, the first fuel cell and the second fuel cell may have the same structure, and the name is distinguished to indicate whether it is a fuel cell that forms the fuel cell stack.

[0077] Thus, some embodiments of the present disclosure can select a certain number of fuel cells from the candidate fuel cells according to requirements, which can not only meet the power requirements of the target device but also avoid unnecessary energy consumption waste.

[0078] Figure 2 It is a flowchart for supplying gas to a fuel cell stack provided by some embodiments of the present disclosure.

[0079] For example, as Figure 2 shown, for step S2, supplying gas to the fuel cell stack includes step S21 and step S22.

[0080] Step S21: Supply gas with a first gas consumption N1 to the fuel cell stack.

[0081] Step S22: Distribute the gas with the first gas consumption N1 to each second fuel cell according to the cell gas distribution ratio Z1 of the fuel cell stack to obtain the corresponding second gas consumption N2 of the gas.

[0082] For example, in some examples, gas with a first gas consumption N1 is supplied to the fuel cell stack through the main gas supply pipeline, and the number of gas supply valves opened and the valve opening degrees of the gas supply valves provided on the branch gas supply pipelines are controlled to distribute the gas with the first gas consumption N1 to each second fuel cell according to the cell gas distribution ratio Z1 of the fuel cell stack to obtain the corresponding second gas consumption N2 of the gas, so as to meet the gas demand for its output target power.

[0083] Thus, some embodiments of the present disclosure control the number of selected fuel cells and the gas distribution amount to achieve the effect of outputting a stable voltage and target power.

[0084] For example, in some examples, the fuel cell stack of the embodiments of the present disclosure may use hydrogen, natural gas, hydrocarbons and hydrocarbon derivatives as fuel gas or fuel. Of course, this is only exemplary and is not a limitation of the embodiments of the present disclosure, and will not be repeated here. For example, natural gas can be directly obtained from the wellhead associated gas and processed by the purification unit for fuel cell power generation.

[0085] Figure 3 Some embodiments of the present disclosure provide Figure 2 Flow chart of step S22.

[0086] For example, Figure 3 As shown, step S22 includes step S221 and step S222.

[0087] Step S221 : obtaining the power conversion efficiency C of each second fuel cell in the fuel cell group, so as to obtain the power conversion efficiency ratio Z2 of the second fuel cells in the fuel cell group.

[0088] Step S222: using the inverse ratio of the ratio Z2 of the power conversion efficiency of the second fuel cells of the fuel cell group as the battery gas distribution ratio Z1 to distribute the corresponding second gas consumption N2 of gas to each second fuel cell.

[0089] Therefore, some embodiments of the present disclosure allocate a corresponding second gas usage amount of gas to each second fuel cell in inverse proportion to the ratio of the power conversion efficiency, so that the second fuel cell with low power conversion efficiency is allocated more gas and the second fuel cell with high power conversion efficiency is allocated less gas, so as to maintain the consistency of the power generation capacity of each second fuel cell of the fuel cell group and achieve the effect of outputting a stable voltage.

[0090] For example, in some examples, obtaining the power conversion efficiency C of each second fuel cell in the fuel cell group includes: periodically calling the gas consumption and output power of each second fuel cell in the fuel cell group to obtain the power conversion efficiency C of each second fuel cell.

[0091] For example, in some examples, the gas consumption and the power at the output end (i.e., the power output) can be obtained through the data output by the detection system of the second fuel cell, or by using a flow meter to obtain the flow of the gas distribution pipeline to obtain the gas input and calculating through an ammeter and a voltmeter on the output circuit. Of course, this is only exemplary and is not a limitation of the embodiments of the present disclosure, and will not be elaborated here.

[0092] Figure 4 Some embodiments of the present disclosure provide Figure 2 Flow chart of step S21.

[0093] For example,Figure 4 As shown, for step S21, it includes step S211 and step S212.

[0094] Step S211: Obtain the total first gas demand M1 of the fuel cell stack per unit time, where the total first gas demand M1 is the total gas demand of all the second fuel cells in the fuel cell stack per unit time.

[0095] Step S212: Allocate gas with a first gas usage amount N1 greater than or equal to the total first gas demand M1 to the fuel cell stack.

[0096] For example, in some examples, obtaining the total first gas demand M1 of the fuel cell stack per unit time includes: based on at least one second fuel cell of the fuel cell stack and the rated gas demand of each second fuel cell, summing up the rated gas demands of each second fuel cell in the fuel cell stack to obtain the total first gas demand at the initial moment of gas distribution, denoted as M1a.

[0097] For example, in some examples, the rated gas demand of the second fuel cell can be obtained through external input. The rated gas demand of the second fuel cell belongs to the inherent property of the battery and is known when the battery leaves the factory, which is prior art known to those skilled in the art and will not be elaborated here.

[0098] For example, in some examples, the rated gas demands of the n second fuel cells of the fuel cell stack may be all equal (for example, denoted as m), then the total first gas demand M1a at the initial moment at this time = m * n. Of course, this is only exemplary and not a limitation of the embodiments of the present disclosure. For example, the rated gas demands of the n second fuel cells of the fuel cell stack may not all be equal, which will not be elaborated here.

[0099] For example, in some examples, obtaining the total first gas demand M1 of the fuel cell stack per unit time further includes: according to the power conversion efficiency C of each second fuel cell, adjusting the second gas usage amount N2 of the second fuel cell in real time and adjusting the total first gas demand M1 in real time, that is, the second gas usage amount N2 of the gas allocated to the second fuel cell and the total first gas demand M1 change in real time because the power conversion efficiency C of the second fuel cell will gradually decrease as the fuel cell is used.

[0100] Thus, some embodiments of the present disclosure can adjust the gas distribution scheme in real time according to the power conversion efficiency of the second fuel cell at different time periods to achieve a more matching power supply efficiency.

[0101] For example, in some examples, the fuel cell-based control method further includes: in response to gas supply to the fuel cell stack, recording the gas reflux pressure, flow rate, and gas consumption during the gas supply process to obtain gas supply record information.

[0102] For example, in some examples, the fuel cell-based control method further includes: in response to the gas supply shutdown information, stopping the gas supply to the fuel cell stack and outputting the gas supply record information.

[0103] Figure 5 For some embodiments provided by the present disclosure Figure 1 Flowchart of step S1.

[0104] For example, as Figure 5 shown, for step S1, it includes step S11 and step S12.

[0105] Step S11: Select n from multiple first fuel cells to supply power to the target device, where n≥2.

[0106] Step S12: Connect n second fuel cells in parallel and / or in series to form a fuel cell stack.

[0107] For example, in some examples, the multiple first fuel cells include n second fuel cells that are selected and enabled and n' spare third fuel cells. For example, the spare third fuel cells can be enabled to replace the discarded second fuel cells when some of the second fuel cells cannot meet the demand. The second fuel cells form a fuel cell stack to supply power to the target device.

[0108] For example, in some examples, the n second fuel cells are connected in parallel to form a fuel cell stack, and the n' spare third fuel cells are also connected in parallel. However, they are not connected to the power supply circuit and the gas supply valve is not opened when not enabled. When they need to be enabled to replace the discarded second fuel cells, the spare third fuel cells are connected to the power supply circuit and the gas supply valve is opened to serve as the second fuel cells for power generation and supply.

[0109] For example, in some examples, when the n second fuel cells are connected in parallel to form a fuel cell stack, even if some of the second fuel cells are discarded, it will not affect the operation of the fuel cells on other parallel branches and will not affect the production increase operation.

[0110] Figure 6 For some embodiments provided by the present disclosure Figure 5 Flowchart of step S11.

[0111] For example, as Figure 6 shown, for step S11, it includes step S111 to step S113.

[0112] Step S111: Obtain power distribution information according to the power demand of the target device. The power distribution information at least includes: the required voltage and required power for the target device, the number of output terminals of n second fuel cells, the voltage of the corresponding output terminals, and the power of the corresponding output terminals.

[0113] Step S112: Obtain the maximum power of a single second fuel cell.

[0114] Step S113: According to the power distribution information and the maximum power of a single second fuel cell, obtain the number n of second fuel cells forming the fuel cell stack.

[0115] Some embodiments of the present disclosure can determine a matching fuel cell stack according to the power demand of the target device and construct a matching power distribution scheme to meet the power supply demand.

[0116] For example, in some examples, the target device is an enhanced production operation device (such as a wellsite electric drive device).

[0117] For example, fracturing refers to a method of forming fractures in an oil or gas reservoir by using hydraulic action during the oil or gas production process, also known as hydraulic fracturing. In a general fracturing operation wellsite, it usually includes fracturing equipment, sand mixing equipment, mixing and blending equipment, chemical addition equipment, etc. Especially in recent years with the exploitation of shale gas, large-scale fracturing operations have become normal. Therefore, the enhanced production operation devices of the embodiments of the present disclosure include, but are not limited to, coiled tubing equipment, liquid nitrogen injection pump equipment, nitrogen production equipment, fracturing equipment, sand mixing equipment, mixing and blending equipment, chemical addition equipment. The target devices applicable to the control method of the embodiments of the present disclosure are not limited to this, and no exhaustive list and elaboration are made here.

[0118] For example, in some examples, the number of target devices to be powered is one or more, which can be determined according to the actual operation situation and is not limited and elaborated here. For example, when the target device includes a certain number (such as 5) of fracturing equipment, the corresponding power demand is determined accordingly to obtain the corresponding power distribution information.

[0119] For example, in some examples, the power demand of the target device can be obtained by the operator's input, or can be obtained by calculating the number or production capacity of the target devices connected to the network. It can be determined according to the actual operation situation, which is not the focus to be elaborated in the embodiments of the present disclosure. To ensure the clarity and conciseness of the embodiments of the present disclosure, no further elaboration is made here.

[0120] For example, in some examples, the maximum power of a single second fuel cell can be obtained by the operator's input, or by calling the inherent stored data of the second fuel cell to obtain the maximum power of a single second fuel cell. The embodiments of the present disclosure do not limit this and do not elaborate. For example, in some examples, each fuel cell has a non-repeating code for distinction.

[0121] For example, in some examples, the target device to be powered can calculate the safety factor of the entire set of target devices based on the maximum operating load a of the device and the rated load b of the device (for example, the safety factor is a / b); based on the power loss percentage c% of the fuel cell during single-stage or multi-stage boost, calculate the required power of the entire set of target devices during normal operation. For example, the actual required power P of the entire set of target devices 实际 The calculation is as follows:

[0122]

[0123] where P 额定 refers to the rated power requirement of the entire set of target devices.

[0124] For example, in some examples, the value obtained by dividing the required power of the target device by the maximum power of a single second fuel cell is equal to the number n of second fuel cells forming the fuel cell stack. At this time, it is default that the maximum powers of each second fuel cell are the same. Of course, the number n of second fuel cells forming the fuel cell stack being greater than the value obtained by dividing the required power of the target device by the maximum power of a single second fuel cell also satisfies the power requirement of the target device.

[0125] For example, in some examples, the control method based on the fuel cell further includes: distributing power to the target device, where distributing power to the target device includes: in response to the power distribution start information, distributing power to the target device according to the power distribution information to achieve power supply to the target device, and periodically recording data to obtain a power distribution database.

[0126] For example, in some examples, distributing power to the target device further includes: starting the energy storage device to supply energy for the start of the fuel cell stack and / or charging the fuel cell stack.

[0127] For example, the fuel cell stack can charge the energy storage device during operation at the rated power. For example, the energy storage device can also be directly connected to a power source, and this power source includes but is not limited to power generation devices such as solar energy, wind energy, gas turbine generators, or grid power, which are not exhaustively listed and elaborated here.

[0128] For example, in some examples, distributing power to the target device further includes: in response to the power distribution shutdown information, stopping power distribution to the target device and outputting the power distribution database.

[0129] For example, in some examples, the power distribution database includes at least the voltage data of the collected output end and the power data of the output end. Of course, this is only exemplary and not a limitation of the embodiments of the present disclosure. For example, the power distribution database may further include energy consumption data (such as the electrical energy data consumed by the connected target device), but since it is not the focus to be elaborated in the embodiments of the present disclosure, in order to ensure the clarity and conciseness of the embodiments of the present disclosure, it will not be elaborated here. It should be noted that the collected power distribution data here is archived in the power distribution database.

[0130] For example, in some examples, in response to forming a fuel cell stack by paralleling n (for example, n≥2) second fuel cells, the control method further includes: detecting the second fuel cells of the fuel cell stack.

[0131] Figure 7 It is a flowchart for detecting the second fuel cells of the fuel cell stack provided by some embodiments of the present disclosure.

[0132] For example, as Figure 7 shown, for the method of detecting the second fuel cells of the fuel cell stack, it includes the following steps:

[0133] Step S31: Obtain the electric energy conversion threshold.

[0134] Step S32: Compare the electric energy conversion efficiency of each second fuel cell in the fuel cell stack with the electric energy conversion threshold, and determine whether the electric energy conversion efficiency of the second fuel cell exceeds the range of the electric energy conversion threshold.

[0135] Step S33a: If not, that is, the electric energy conversion efficiency of each second fuel cell in the fuel cell stack does not exceed the range of the electric energy conversion threshold, then obtain the average value of the electric energy conversion efficiencies of all the second fuel cells in the fuel cell stack.

[0136] Step S33b: If so, that is, the electric energy conversion efficiency of at least one second fuel cell in the fuel cell stack exceeds the range of the electric energy conversion threshold, then compare the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold with the upper limit of the electric energy conversion threshold, and determine whether the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold is greater than the upper limit of the electric energy conversion threshold.

[0137] Step S33b1: If so, that is, the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold is greater than the upper limit of the electric energy conversion threshold, then output a warning message.

[0138] Step S33b2: If not, that is, the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold is less than the lower limit of the electric energy conversion threshold, then shut down and mark the corresponding second fuel cell and enable an equal number of other first fuel cells (that is, standby third fuel cells) to be used as second fuel cells.

[0139] For example, in some examples, for obtaining the power conversion threshold in step S31, it includes: obtaining the power conversion threshold through an external input. For example, the power conversion threshold is obtained by an operator's input.

[0140] Again, for example, in some examples, for obtaining the power conversion threshold in step S31, it includes: obtaining the power conversion threshold according to the average value of the power conversion efficiencies of all the second fuel cells in the obtained fuel cell stack. That is, since the power conversion efficiency of the second fuel cell gradually decreases as the operation time progresses, the power conversion limit, i.e., the power conversion threshold, is adjusted by calculating the average value of the power conversion efficiencies of all the second fuel cells. Thus, it can be seen that the power conversion threshold changes in real time during the operation process.

[0141] Some embodiments of the present disclosure can detect the power conversion efficiency of fuel cells, replace the fuel cells with too low power conversion efficiency, thereby improving the overall power conversion efficiency and reducing the waste of gas.

[0142] For example, in some examples, after going through step S33b2, it further includes: responding to marking the corresponding second fuel cell and enabling an equal number of other first fuel cells, and outputting a corresponding exception report, where the exception report can be used to guide the operator to check and repair the corresponding second fuel cell.

[0143] For example, in some examples, in response to forming a fuel cell stack by paralleling n (e.g., n≥2) second fuel cells, the control method further includes: predicting the compliance situation of the second fuel cell.

[0144] Figure 8 It is a flowchart for predicting the compliance situation of the second fuel cell provided by some embodiments of the present disclosure.

[0145] For example, as Figure 8 shown, for the method of predicting the compliance situation of the second fuel cell, it includes the following steps:

[0146] Step S41: Responding to the power distribution information, obtaining the power output demand P1 of each second fuel cell in the fuel cell stack.

[0147] Step S42: According to the power output demand P1 of the second fuel cell and the power conversion efficiency of the second fuel cell, obtaining the target gas consumption N3 of the fuel cell, where the target gas consumption N3 is the gas amount required to output the power output demand P1 at the output end of the second fuel cell under the set power conversion efficiency. For example, the lower the power conversion efficiency, the greater the gas amount required to output the same power output demand P1, and vice versa, the smaller the required gas amount.

[0148] Step S43: By invoking the second gas consumption N2 of the gas allocated to the second fuel cell, compare the second gas consumption N2 with the target gas consumption N3, and determine whether the second gas consumption N2 is not less than the target gas consumption N3.

[0149] Step S44a: If so, that is, the second gas consumption N2 of the gas allocated to the second fuel cell is not less than the target gas consumption N3, then output a pre-judgment normal message.

[0150] Step S44b: If not, that is, the second gas consumption N2 of the gas allocated to the second fuel cell is less than the target gas consumption N3, then output a pre-judgment abnormal message.

[0151] For example, in some examples, the power output demand P1 of the second fuel cell is the power of the output end corresponding to the second fuel cell included in the power distribution information.

[0152] For example, in some examples, as Figure 8 shown, in response to outputting the pre-judgment abnormal message, the following steps are further included:

[0153] Step S45: Determine whether replacement information is obtained.

[0154] Step S46a: If so, that is, replacement information is obtained, then shut down the corresponding second fuel cell and enable an equal number of other first fuel cells to be used as the second fuel cell.

[0155] Step S46b: If not, that is, replacement information is not obtained, then continuously monitor the power of the output end of the corresponding second fuel cell and output the monitoring result.

[0156] Some embodiments of the present disclosure predict the compliance of the second fuel cell through the gas consumption, can replace the fuel cell with too low power conversion efficiency, thereby improving the overall power conversion efficiency and reducing the waste of gas.

[0157] As described above, at least one embodiment of the present disclosure can construct a matching power distribution plan according to the displacement demand of the target device (such as the production increase device), and use the adjustment of the fuel cell stack to make the power supply end meet the input demand of the power distribution plan, thereby meeting the closed-loop of the production increase demand, and dynamically adjust the power supply during the production increase operation to achieve a more matching power supply efficiency and reduce the waste of electric energy and fuel.

[0158] For example, in the above closed-loop process, the fuel cell with too low power conversion efficiency can be replaced by detecting the power conversion efficiency of the fuel cell, thereby improving the overall power conversion efficiency and reducing the waste of gas.

[0159] For example, in some examples, the control method further includes: monitoring the gas storage of the current gas source.

[0160] Figure 9 Flowchart for monitoring the gas storage of the current gas source provided by some embodiments of the present disclosure.

[0161] For example, as Figure 9 shown, for the method of monitoring the gas storage of the current gas source, it includes the following steps:

[0162] Step S51: Provide an operation plan for the target device, where the operation plan includes the target operation time of the target device and the required power of the target device;

[0163] Step S52: According to the operation plan, obtain the total amount of electrical energy required by the target device within the operation plan;

[0164] Step S53: According to the total amount of electrical energy, obtain the second total gas demand M2 of the fuel cell stack for the required gas.

[0165] Step S54: Compare the existing gas storage D of the current gas source with the second total gas demand M2, and determine whether the existing gas storage D is not less than the second total gas demand M2.

[0166] Step S55a: If so, that is, the existing gas storage D is not less than the second total gas demand M2, then operate normally.

[0167] Step S55b: If not, that is, the existing gas storage D is less than the second total gas demand M2, then enable other gas sources and / or issue a warning message.

[0168] For example, in some examples, the target operation time of the target device and the required power of the target device included in the operation plan can be obtained by external input, or can be obtained based on the startup cycle operation of the target device in historical data. It should be noted that since the specific method for obtaining the operation plan is not the focus to be elaborated in the embodiments of the present disclosure, for the sake of clarity and conciseness of the embodiments of the present disclosure, it will not be elaborated here.

[0169] For example, in some examples, as Figure 9 shown, in response to the existing gas storage D being less than the second total gas demand M2, it further includes the following steps:

[0170] Step S56: Determine whether there are other gas sources.

[0171] Step S57a: If so, then enable multiple gas sources simultaneously, that is, start at least one of the other gas sources except the current gas source simultaneously.

[0172] Step S57b: If not, then issue a warning message.

[0173] For example, in some examples, the gas source may be one or more of a gas storage tank, a wellhead, an on-vehicle gas source, on-site hydrogen production from natural gas, and hydrogen production by electrolyzing water. The embodiments of the present disclosure are not limited thereto.

[0174] Some embodiments of the present disclosure can monitor whether the gas inventory of the current gas source meets the current demand, and can also promptly activate other gas sources or send a warning message to notify the operator when the gas inventory is insufficient, so as to ensure the continuous and smooth progress of the operation.

[0175] For example, in some examples, in response to forming a fuel cell stack by paralleling n (e.g., n≥2) second fuel cells, the control method further includes: monitoring the real-time gas supply of the second fuel cells.

[0176] Figure 10 It is a flowchart for monitoring the real-time gas supply of the second fuel cells provided by some embodiments of the present disclosure.

[0177] For example, as Figure 10 shown, for the method of monitoring the real-time gas supply of the second fuel cells, the following steps are included:

[0178] Step S61: Periodically call the power conversion efficiency and the power at the output end of each second fuel cell in the fuel cell stack to obtain the actual required gas volume N4 of the second fuel cells.

[0179] Step S62: Compare the actual required gas volume N4 of the second fuel cells with the second gas usage N2 of the gas that is actually allocated in real time, and determine whether the second gas usage N2 is not less than the actual required gas volume N4.

[0180] Step S63a: If so, that is, the second gas usage N2 of the gas that is actually allocated to the second fuel cells in real time is not less than the actual required gas volume N4, then operate normally.

[0181] Step S63b: If not, that is, the second gas usage N2 of the gas that is actually allocated to the second fuel cells in real time is less than the actual required gas volume N4, then monitor the valve opening degree of the corresponding gas distribution valve configured to supply gas to the second fuel cells.

[0182] For example, based on the monitored valve opening degree of the corresponding gas distribution valve, the following steps are further included:

[0183] Step S64: Determine whether the valve opening degree of the corresponding gas distribution valve reaches the maximum valve opening degree.

[0184] Step S65a: If so, that is, the valve opening degree of the corresponding gas distribution valve has reached the maximum valve opening degree, then output real-time gas supply abnormal information, shut down the corresponding second fuel cell, and enable an equal number of other first fuel cells to be used as the second fuel cell.

[0185] Step S65b: If not, that is, the valve opening degree of the corresponding gas distribution valve has not reached the maximum valve opening degree, then output valve opening degree increase control information to increase the valve opening degree of the corresponding gas distribution valve, so that the second gas consumption of the gas allocated to the second fuel cell is not less than the actual required gas volume.

[0186] For example, for the valve opening degree increase control information in Step S65b, it includes the position of the gas distribution valve to be adjusted and the instruction to increase its valve opening degree upward. Of course, this is only exemplary and not a limitation of the embodiments of the present disclosure.

[0187] For example, in some examples, the method of monitoring the real-time gas supply situation of the second fuel cell is a process of real-time feedback in the control method.

[0188] It can be seen that the gas distribution process of the fuel cell stack in some embodiments of the present disclosure can obtain the power conversion efficiency of the fuel cell according to the power distribution scheme, the gas consumption of the corresponding fuel cell, and the power at the output end (which can also be called the output of electric energy), and allocate an appropriate amount of gas to ensure the stable output of electric energy by the entire control device and reduce the waste of electric energy and gas.

[0189] For example, in some examples, the control method further includes: monitoring the pressure situation of the gas distribution pipeline for gas distribution.

[0190] Figure 11 It is a flowchart for monitoring the pressure situation of the gas distribution pipeline for gas distribution provided by some embodiments of the present disclosure.

[0191] For example, as Figure 11 shown, for the method of monitoring the pressure situation of the gas distribution pipeline for gas distribution, it includes the following steps:

[0192] Step S71: Obtain pressure threshold information.

[0193] Step S72: Periodically call the pressure data of the gas distribution pipeline and the pressure threshold information, compare the pressure data with the pressure threshold information, and judge whether the pressure data exceeds the range of the pressure threshold information.

[0194] Step S73a: If not, that is, the pressure data does not exceed the range of the pressure threshold information, then operate normally.

[0195] Step S73b: If so, that is, the pressure data exceeds the range of the pressure threshold information, then output control information for reducing pressure or output control information for increasing pressure.

[0196] For example, in some examples, such as Figure 11 shown, in response to the pressure data exceeding the range of the pressure threshold information, the following steps are further included:

[0197] Step S74: Determine whether the pressure data is greater than the upper limit of the pressure threshold information.

[0198] Step S75a: If so, output control information for reducing the pressure to reduce the pressure data of the gas distribution pipeline so that the pressure data falls within the range of the pressure threshold information.

[0199] Step S75b: If not, that is, the pressure data is less than the lower limit of the pressure threshold information, output control information for increasing the pressure to increase the pressure data of the gas distribution pipeline so that the pressure data falls within the range of the pressure threshold information.

[0200] For example, in some examples, the pressure threshold information can be obtained by input from an operator.

[0201] For example, in some examples, the pressure threshold information is the pressure range between the maximum pressure that the entire gas distribution pipeline and related structures can withstand and the minimum pressure required for its normal operation.

[0202] For example, in some examples, the control information for increasing the pressure includes the position of the gas distribution valve to be adjusted and an instruction to adjust its valve opening upward; and for another example, in some examples, the control information for reducing the pressure includes the position of the gas distribution valve to be adjusted and an instruction to adjust its valve opening downward. Of course, this is merely exemplary and not a limitation of the embodiments of the present disclosure.

[0203] Some embodiments of the present disclosure can adjust the pressure of the gas distribution pipeline according to the monitored pressure condition of the gas distribution pipeline for gas distribution, ensure that the real-time pressure is within the range that the entire gas distribution pipeline and related structures can withstand, avoid damage to the gas distribution pipeline and related structures, and ensure the smooth progress of the operation.

[0204] For example, in some examples, the control method further includes: monitoring the water heat dissipation cycle of the second fuel cell.

[0205] Figure 12 It is a flowchart for monitoring the water heat dissipation cycle of the second fuel cell provided by some embodiments of the present disclosure.

[0206] For example, as Figure 12 shown, for the method of monitoring the water heat dissipation cycle of the second fuel cell, the following steps are included:

[0207] Step S81: Obtain the set working temperature range of each second fuel cell.

[0208] Step S82: Detect the real-time temperature of the water in the second fuel cell through the water temperature sensor built in the second fuel cell.

[0209] Step S83: Compare the real-time temperature of the water in the second fuel cell with the set operating temperature range, and determine whether the real-time temperature of the water is lower than the set operating temperature range.

[0210] Step S84a: If so, that is, the real-time temperature of the water is lower than the set operating temperature range, then through the circulation pump, the water is circulated back to the second fuel cell through the humidifier.

[0211] Step S84b: If not, that is, the real-time temperature is not lower than the set operating temperature range, then through the circulation pump, the water is circulated through the radiator to the humidifier and then back to the second fuel cell.

[0212] For example, in some examples, the humidifier is a device that improves the moisture content in the fuel gas and air by distributing part of the circulating water.

[0213] For example, in some examples, the set operating temperature range is the optimal operating temperature range of the second fuel cell. This optimal operating temperature range can be freely adjusted according to the actual situation, and the embodiments of the present disclosure do not limit this.

[0214] For example, in some examples, the control method further includes: monitoring the water volume of the circulating water of the fuel cell stack.

[0215] Figure 13 It is a flowchart for monitoring the water volume of the circulating water of the fuel cell stack provided by some embodiments of the present disclosure.

[0216] For example, as Figure 13 shown, for the method of monitoring the water volume of the circulating water of the fuel cell stack, it includes the following steps:

[0217] Step S91: By monitoring the water volume of the circulating water corresponding to each second fuel cell in the fuel cell stack, obtain the total water volume of the circulating water of the fuel cell stack.

[0218] Step S92: Compare the total water volume of the circulating water of the fuel cell stack with the normal working water demand of the fuel cell stack, and determine whether the total water volume of the circulating water of the fuel cell stack meets the normal working water demand of the fuel cell stack.

[0219] Step S93a: If so, that is, the total water volume of the circulating water of the fuel cell stack is within the range of the normal working water demand of the fuel cell stack, then through the circulation pump, the circulating water is circulated back to the second fuel cell through the humidifier.

[0220] Step S93b: If not, that is, if the total amount of the circulating water of the fuel cell stack is not within the range of the normal working water demand of the fuel cell stack, then determine again whether the total amount of the circulating water of the fuel cell stack is lower than the normal working water demand of the fuel cell stack.

[0221] Step S93b1: If not, that is, if the total amount of the circulating water of the fuel cell stack is higher than the upper limit of the normal working water demand of the fuel cell stack, then drain the fuel cell stack until it is monitored that the total amount of the circulating water of the fuel cell stack is equal to the normal working water demand of the fuel cell stack, and then stop draining.

[0222] Step S93b2: If so, that is, if the total amount of the circulating water of the fuel cell stack is lower than the lower limit of the normal working water demand of the fuel cell stack, then output a warning message.

[0223] For example, in some examples, the valve group (such as a one-way valve) in the fuel cell stack is controlled by outputting an electrical signal to drain the fuel cell stack.

[0224] Thus, at least one embodiment of the present disclosure can dynamically adjust the working temperature of the fuel cell stack through the water circulation utilization and distribution process, reasonably humidify the fuel gas and air, discharge the excess water in the fuel cell, so that the fuel cell stack reaches and maintains an efficient working state.

[0225] As described above, the power distribution steps of the present disclosure using electric energy conversion and distribution can implement a suitable power distribution scheme according to the input power demand, collect and record power distribution data, and based on the recorded power distribution data, the usage of the fuel cell (such as the electric energy conversion efficiency of the fuel cell) can be calculated. For example, when the fuel cell is abnormal, a warning and an abnormality report are output in a timely manner, and the remaining fuel cells equal to the number of the abnormal cells are started to ensure a stable electric energy output of the entire control device, and the power distribution scheme can be dynamically adjusted according to the actual on-site power supply situation to reduce the waste of electric energy and fuel.

[0226] Figure 14 It is a schematic block diagram of a control device based on a fuel cell provided by some embodiments of the present disclosure. Figure 15 It is a module composition diagram of a control device based on a fuel cell provided by some embodiments of the present disclosure. Figure 16 It is a composition diagram of a plurality of first fuel cells provided by some embodiments of the present disclosure. Figure 17 It is a module composition diagram of a module for supplying gas to a fuel cell stack provided by some embodiments of the present disclosure.

[0227] For example, as Figure 14 shown, the fuel cell-based control device 100 includes a first controller 102, a gas supply module 103, a second controller 104, and a plurality of first fuel cells 101.

[0228] For example, as Figures 14 - 17 shown, a plurality of first fuel cells 101 include at least one first fuel cell 101 selected to form a fuel cell stack 11a. The first controller 102 is configured to select at least one from the plurality of first fuel cells 101 to form the fuel cell stack 11a. Each first fuel cell forming the fuel cell stack 11a is a second fuel cell 105.

[0229] For example, as Figure 16 shown, the number of first fuel cells 101 to be selected is greater than the number of second fuel cells 105 forming the fuel cell stack 11a (for example, there are 9 first fuel cells 101 to be selected and 6 second fuel cells 105 forming the fuel cell stack 11a as shown in the figure). In addition to the second fuel cells 105 selected to form the fuel cell stack 11a, the plurality of first fuel cells 101 may further include at least one first fuel cell not selected (denoted as a spare third fuel cell 101'), such as Figure 16 shown, there are 3 spare third fuel cells 101'. Of course, this is only exemplary and not a limitation of the embodiments of the present disclosure.

[0230] For example, at different time periods, the fuel cell stack may include different second fuel cells 105, that is, the first fuel cells can be selected as needed. For example, at different time periods, the number of second fuel cells 105 in the fuel cell stack may be the same or different. For example, the first fuel cell 101 and the second fuel cell 105 may have the same structure, and the name distinction is made to distinguish whether it is a fuel cell forming the fuel cell stack.

[0231] For example, the spare third fuel cell 101' can be activated to replace the discarded second fuel cell when some second fuel cells 105 cannot meet the requirements and are discarded.

[0232] For example, as Figures 14 - 17 shown, the gas distribution module 103 includes a gas distribution pipeline 1031 and at least one gas distribution valve 1032. Among them, the gas distribution pipeline 1031 includes a main gas distribution pipeline 10311 and at least one gas distribution branch pipeline 10312 that shunts the main gas distribution pipeline 10311 (for example Figure 15 shown, n gas distribution branch pipelines 10312, n≥2), and the main gas distribution pipeline 10311 is configured to transmit the gas with the first gas consumption N1 for the fuel cell stack 11a. At least one gas distribution valve 1032 is provided on at least one gas distribution branch pipeline 10312 and is configured to supply gas to each second fuel cell 105 in the fuel cell stack 11a (for example Figure 15The n second fuel cells 105 (n≥2) shown distribute fuel gas. The second controller 104 is configured to control the valve opening degree of each of at least one gas distribution valve 1032 to control the distribution of fuel gas with a first fuel gas consumption N1 to each second fuel cell 105 according to the distribution ratio of the second fuel cells 105 of the fuel cell stack 11a, so as to distribute corresponding second fuel gas consumption N2 of fuel gas to each second fuel cell 105.

[0233] For example, in some examples, at least one gas distribution valve 1032 and at least one gas distribution branch pipeline 10312 are in one-to-one correspondence, and at least one gas distribution valve 1032 and at least one second fuel cell 105 are in one-to-one correspondence. Of course, this is only exemplary and not a limitation of the embodiments of the present disclosure. For example, one gas distribution branch pipeline 10312 and one second fuel cell 105 may correspond to multiple gas distribution valves 1032, etc. There is no need to list and elaborate here, and it can be freely adjusted according to actual needs.

[0234] For example, as Figure 15 shown, the control device 100 further includes a power distribution module 106. Among them, multiple second fuel cells 105 of the fuel cell stack 11a are used to supply power to the target device 107. The input end of the power distribution module 106 is connected to the output end of each second fuel cell 105 in the fuel cell stack 11a, and the output end of the power distribution module 106 is connected to the target device 107 to distribute power to the target device 107. Thus, the power distribution module 106, the fuel cell stack 11a, and the gas distribution module 103 are used to form an energy supply module 108 for power supply.

[0235] For example, the power distribution module 106 includes a transformer 1061 (i.e., a power distribution transformer 1061) and an inverter 1062 (i.e., a power distribution inverter 1062). Of course, this is only exemplary and not a limitation of the embodiments of the present disclosure.

[0236] For example, in some examples, both ends of the input end and the output end of each second fuel cell 105 are respectively connected to the input end and the output end of the power distribution module 106 (not shown) to realize single-stage or multi-stage boosting of the second fuel cell 105.

[0237] For example, as Figure 15 shown, multiple second fuel cells 105 are connected in parallel to form a fuel cell stack 11a. Of course, the embodiments of the present disclosure are not limited to this. For example, multiple second fuel cells 105 can also be connected in series to form a fuel cell stack (not shown), which will not be elaborated here.

[0238] For example, in some examples, a switch is provided on the circuit between any two second fuel cells 105 connected in parallel to dynamically control the connection or output on-off of the second fuel cells 105.

[0239] For example, in some examples, n second fuel cells 105 are connected in parallel to form a fuel cell stack 11a, and n' spare third fuel cells 11' are also connected in parallel. For example, referring to Figures 15 - 17 the second fuel cells 105 are connected in parallel, for example Figure 17 the spare third fuel cells 11' are not shown, and reference can be made to Figure 15 and Figure 16 , which does not affect the understanding of the embodiments of the present disclosure by those skilled in the art and will not be elaborated here. For example, when the spare third fuel cells 11' are not enabled, they are not connected to the power supply circuit and the corresponding gas distribution valves are not opened. When it is necessary to enable the spare third fuel cells 11' to replace the discarded second fuel cells, the spare third fuel cells 11' are connected to the power supply circuit and the corresponding gas distribution valves are opened to serve as the second fuel cells for power generation.

[0240] For example, in some examples, when n second fuel cells 105 are connected in parallel to form a fuel cell stack 11a, even if some of the second fuel cells are discarded, it will not affect the operation of the fuel cells on other parallel branches and will not affect the production increase operation.

[0241] For example, as Figure 15 shown, the control device 100 further includes an energy storage device 109. Among them, the energy storage device 109 can be used to alleviate the instantaneous power fluctuation caused by the load fluctuation. For example, by starting the energy storage device 109, it can supply energy for the startup of the fuel cell stack 11a and / or charge through the fuel cell stack 11a, that is, the energy storage device 109 can supply energy for the startup of the fuel cell stack 11a, and the second fuel cell can also charge the energy storage device.

[0242] For example, the energy storage device 109 includes an energy storage unit including one or more energy storage units (such as a storage battery 1091). It should be noted that the energy storage units included in the energy storage device 109 are not limited to the storage battery 1091, and can also be an electrical energy storage structure such as a large capacitor with the functions of electrical energy storage and output. The embodiments of the present disclosure do not limit this.

[0243] For example, as Figure 14 and Figure 15 shown, the control device 100 further includes a gas source unit 110. Among them, the main gas distribution pipeline 10311 of the gas distribution module 103 is connected to the gas source unit, and n gas distribution branch pipelines 10312 are respectively connected to the main gas distribution pipeline 10311 to supply gas to the gas distribution module 103 of the energy supply module 108.

[0244] For example, as Figure 15As shown, the control device 100 further includes a buffer unit 111, where the buffer unit 111 is disposed on the main gas distribution pipeline 10311. For example, the buffer unit 111 includes a gas storage tank for buffering the gas using the gas storage tank when the gas source unit outputs gas, ensuring a stable supply of gas to the main gas distribution pipeline 10311.

[0245] For example, as Figure 15 As shown, the control device 100 further includes a water treatment unit 112 and a filtration unit 113. The output end of the water treatment unit 112 is connected to the filtration unit 113, and the output end of the filtration unit 113 is respectively connected to the target device 107 and the energy supply module 108 (such as the fuel cell stack 11a of the energy supply module 108), for collecting and regulating the temperature of the water separated by the filtration unit 113 and supplying it to the target device 107 and the energy supply module 108 (such as the fuel cell stack 11a of the energy supply module 108).

[0246] For example, as Figure 15 As shown, the target device 107 includes a well stimulation module for performing well stimulation operations at the well site. That is, the control device in the embodiments of the present disclosure can be applicable to the power supply of oil and gas field stimulation well sites. For example, the stimulation module includes, but is not limited to, sand mixing equipment, blending equipment, fracturing equipment, acidizing equipment, liquid supply equipment, etc., which are not exhaustively listed and limited here.

[0247] For example, in at least one embodiment of the present disclosure, when the fuel cell-based control device is applicable to well stimulation, for example, the target device 107 includes a well stimulation module, the formed fuel cell stack is used to power the well stimulation module, and the fuel cell-based control device in any of the above embodiments can also be used as a fuel cell-based well stimulation device, which will not be elaborated here.

[0248] It should be noted that the first controller and / or the second controller in some embodiments of the present disclosure can be at least a part of the total controller module included in the fuel cell-based control device 100. For example, the total controller module can further include a third controller to control and implement some functions or other functions described in the above embodiments, which will not be elaborated here.

[0249] The control device 100 according to an embodiment of the present disclosure may further include one or more processors and one or more memories. The processor can process data signals and can include various computing architectures, such as a complex instruction set computer (CISC) architecture, a reduced instruction set computer (RISC) architecture, or an architecture that implements a combination of multiple instruction sets. The memory can store instructions and / or data executed by the processor. These instructions and / or data can include code for implementing some or all of the functions of one or more devices described in the embodiments of the present disclosure. For example, the memory includes dynamic random access memory (DRAM), static random access memory (SRAM), flash memory, optical memory, or other memories well known to those skilled in the art.

[0250] In some embodiments of the present disclosure, the first controller and the second controller include code and programs stored in the memory; the processor can execute the code and programs to implement some or all of the functions of the first controller and the second controller as described above.

[0251] In some embodiments of the present disclosure, the first controller and the second controller can be special hardware devices used to implement some or all of the functions of the first controller and the second controller as described above. For example, the first controller and the second controller can be a circuit board or a combination of multiple circuit boards for implementing the functions as described above. In the embodiments of the present disclosure, the combination of the one or more circuit boards can include: (1) one or more processors; (2) one or more non-transitory computer-readable memories connected to the processor; and (3) firmware stored in the memory that can be executed by the processor.

[0252] In some embodiments of the present disclosure, in an actual product, the first controller and the second controller (or, for example, the first controller, the second controller, and the third controller) can be integrated into one circuit to form the above-mentioned total controller module. Of course, the total controller module according to the embodiments of the present disclosure can also be designed to include the first controller and the second controller (or, for example, the first controller, the second controller, and the third controller) as several independent control parts to implement corresponding functions respectively, that is, the specific manner depends on the actual situation, and the embodiments of the present disclosure do not limit this.

[0253] It should be noted that in the embodiments of the present disclosure, the control device 100 can include more or fewer modules, and the connection relationships between the various modules are not limited and can be determined according to actual needs. The composition manners of the various modules are not limited. For the technical effects of the control device 100, reference can be made to the technical effects of the control method in the above embodiments of the present disclosure, which will not be elaborated here.

[0254] It should be noted that although the above describes the fuel cell-based control device as being divided into modules for performing corresponding processes respectively, however, as is clear to those skilled in the art, the processes executed by each module can also be executed when the fuel cell-based control device does not perform the specific module division in the above manner or there is no clear demarcation between some modules, etc., which will not be elaborated here.

[0255] For example, in some examples, for a single electric drive fracturing device or an electric drive complete set of equipment, if its power requirement is greater than or equal to 1800 kW, a fuel cell stack is built for this target device. That is to say, in principle, it is entirely possible to use fuel cells to supply power to the electric drive equipment (such as a single electric drive fracturing device or an electric drive complete set of equipment, etc.) instead of the power grid.

[0256] For example, in some examples, all the fuel cells that can be mass-produced in the current industry are in the hundred-kilowatt level. For example, if a 100 kW fuel cell stack is used, 30 groups need to be combined in series and / or parallel to meet the power requirement of the fracturing equipment. Calculated according to the volume of a single 100 kW fuel cell being 0.3 m 3 The total volume of a 3000 kW fuel cell is 9 m 3 , and the weight is about 8 t. It can be loaded on platforms such as vehicles, trailers, and skids. During operation, a controller, a gas distribution module, a storage battery, etc. need to be equipped, and corresponding inverters and transformers, etc. can be equipped for the power distribution module according to the actual application situation. For specific references, please refer to the above description, which will not be elaborated here.

[0257] The following points need to be explained:

[0258] (1) The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0259] (2) Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0260] As described above, the above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. The protection scope of the present disclosure should be subject to the protection scope of the claimed rights.

Claims

1. A control method based on a fuel cell, comprising: selecting at least one from a plurality of first fuel cells to form a fuel cell stack; and supplying gas to the fuel cell stack; wherein each of the first fuel cells forming the fuel cell stack is a second fuel cell, supplying gas to the fuel cell stack includes: allocating gas with a first gas consumption amount to the fuel cell stack; allocating the gas with the first gas consumption amount to each of the second fuel cells according to a battery gas distribution ratio to obtain a corresponding second gas consumption amount of gas; wherein selecting at least one from a plurality of first fuel cells to form a fuel cell stack includes: selecting more than two from the plurality of first fuel cells to supply power to a target device; connecting more than two of the second fuel cells in parallel and / or in series to form the fuel cell stack; wherein in response to forming the fuel cell stack by connecting a plurality of the second fuel cells in parallel, it further includes: detecting the second fuel cells of the fuel cell stack, and wherein detecting the second fuel cells of the fuel cell stack includes: obtaining an electric energy conversion threshold; comparing the electric energy conversion efficiency of each second fuel cell in the fuel cell stack with the electric energy conversion threshold; in response to the electric energy conversion efficiency of each second fuel cell in the fuel cell stack not exceeding the range of the electric energy conversion threshold, obtaining an average value of the electric energy conversion efficiencies of all the second fuel cells in the fuel cell stack; in response to the electric energy conversion efficiency of at least one second fuel cell in the fuel cell stack exceeding the range of the electric energy conversion threshold, it includes: comparing the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold with the upper limit of the electric energy conversion threshold, in response to the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold being greater than the upper limit of the electric energy conversion threshold, outputting a warning message, and in response to the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold being less than the lower limit of the electric energy conversion threshold, shutting down and marking the corresponding second fuel cell and enabling an equal number of other first fuel cells to be used as the second fuel cell.

2. The control method according to claim 1, wherein, allocating the gas with the first gas consumption amount to each of the second fuel cells according to a battery gas distribution ratio includes: obtaining the electric energy conversion efficiency of each second fuel cell in the fuel cell stack to obtain a ratio of the electric energy conversion efficiencies of the second fuel cells in the fuel cell stack; using the inverse of the ratio of the electric energy conversion efficiencies of the second fuel cells in the fuel cell stack as the battery gas distribution ratio to allocate the corresponding second gas consumption amount of gas to each of the second fuel cells.

3. The control method according to claim 2, wherein, obtaining the electric energy conversion efficiency of each second fuel cell in the fuel cell stack includes: periodically calling the gas consumption amount and the power at the output end of each second fuel cell in the fuel cell stack to obtain the electric energy conversion efficiency of each second fuel cell.

4. The control method according to claim 1, wherein, allocating gas with a first gas consumption amount to the fuel cell stack includes: Obtain the total first gas demand of the fuel cell stack within a unit time, where the total first gas demand is the total gas demand required by all the second fuel cells in the fuel cell stack within a unit time; Allocate gas with a first gas usage amount greater than or equal to the total first gas demand to the fuel cell stack.

5. The control method according to claim 4, wherein, Obtaining the total first gas demand of the fuel cell stack within a unit time includes: Based on at least one second fuel cell of the fuel cell stack and the rated gas demand of each second fuel cell, sum up the rated gas demands of each second fuel cell in the fuel cell stack to obtain the total first gas demand at the initial moment of gas distribution.

6. The control method according to claim 5, wherein, Obtaining the total first gas demand of the fuel cell stack within a unit time further includes: According to the power conversion efficiency of each second fuel cell, adjust the second gas usage amount in real time and adjust the total first gas demand in real time.

7. The control method according to claim 5 further includes: In response to gas distribution to the fuel cell stack, record the gas reflux pressure, flow rate, and gas consumption during the gas distribution process to obtain gas distribution record information.

8. The control method according to claim 7 further includes: In response to gas distribution shutdown information, stop gas distribution to the fuel cell stack and output the gas distribution record information.

9. The control method according to claim 1, wherein, The target device includes one or more well site stimulation modules.

10. The control method according to claim 9, wherein, The well site stimulation module includes fracturing equipment and / or sand mixing equipment.

11. The control method according to claim 1 or 9 or 10, wherein, Selecting more than two from the multiple first fuel cells to supply power to the target device includes: Obtain power distribution information according to the power demand of the target device, where the power distribution information includes: the required voltage and required power for the target device, the number of output terminals of the multiple second fuel cells, the voltage of the corresponding output terminals, and the power of the corresponding output terminals; Obtain the maximum power of a single second fuel cell; According to the power distribution information and the maximum power of a single second fuel cell, obtain the number of second fuel cells forming the fuel cell stack.

12. The control method according to claim 11 further includes: Distribute power to the target device, where distributing power to the target device includes: In response to power distribution start information, distribute power to the target device according to the power distribution information to achieve power supply to the target device, and periodically record data to obtain a power distribution database.

13. The control method according to claim 12, wherein, Distributing power to the target device further includes: Start the energy storage device to supply energy for the start of the fuel cell stack and / or charge through the fuel cell stack.

14. The control method according to claim 13, wherein, Distributing power to the target device further includes: In response to power distribution shutdown information, stop distributing power to the target device and output the power distribution database.

15. The control method according to claim 1, wherein, Obtaining the power conversion threshold includes: Obtain the power conversion threshold through external input, or obtain the power conversion threshold according to the average value of the power conversion efficiencies of all the second fuel cells in the obtained fuel cell stack.

16. The control method according to claim 11, wherein, In response to forming the fuel cell stack by paralleling multiple second fuel cells, it further includes: predicting the compliance situation of the second fuel cells, where predicting the compliance situation of the second fuel cells includes: In response to the distribution information, obtain the power output demand of each second fuel cell in the fuel cell stack; According to the power output demand of the second fuel cell and the power conversion efficiency of the second fuel cell, obtain the target gas consumption of the fuel cell, where the target gas consumption is the gas amount required to consume when the output end of the second fuel cell outputs the power of the power output demand under the set power conversion efficiency; Call the second gas consumption of the gas allocated to the second fuel cell, and compare the second gas consumption with the target gas consumption; In response to the second gas consumption of the gas allocated to the second fuel cell being not less than the target gas consumption, output a pre-judgment normal information, and in response to the second gas consumption of the gas allocated to the second fuel cell being less than the target gas consumption, output a pre-judgment abnormal information.

17. The control method according to claim 16, wherein, In response to the output of the pre-judgment abnormal information, it further includes: In response to obtaining replacement information, shut down the corresponding second fuel cell and enable an equal number of other first fuel cells to be used as the second fuel cell, and in response to not obtaining replacement information, continuously monitor the power of the output end of the corresponding second fuel cell and output the monitoring result.

18. The control method according to claim 1 or 9 or 10 further includes: Monitor the gas stock of the current gas source, where monitoring the gas stock of the current gas source includes: Provide an operation plan for the target device, where the operation plan includes the target operation time of the target device and the required power of the target device; According to the operation plan, obtain the total amount of electric energy required by the target device within the operation plan; According to the total amount of electric energy, obtain the total second gas demand of the gas required by the fuel cell stack; Compare the stored amount of the gas stored in the current gas source with the total second gas demand; In response to the stored amount being not less than the total second gas demand, operate normally, and in response to the stored amount being less than the total second gas demand, enable other gas sources and / or issue a warning message.

19. The control method according to claim 1 or 9 or 10, wherein, In response to forming the fuel cell stack by connecting multiple second fuel cells in parallel, it further includes: monitoring the real-time gas supply situation of the second fuel cell, where monitoring the real-time gas supply situation of the second fuel cell includes: Periodically call the power conversion efficiency and the power of the output end of each second fuel cell in the fuel cell stack to obtain the actual required gas amount of the second fuel cell; Compare the actual required gas amount of the second fuel cell with the second gas consumption of the gas actually allocated in real time; In response to the second gas consumption of the gas actually allocated to the second fuel cell in real time being not less than the actual required gas amount, operate normally; In response to the second gas consumption of the gas actually allocated to the second fuel cell in real time being less than the actual required gas amount, monitor the valve opening size of the corresponding gas distribution valve configured to distribute gas to the second fuel cell. Wherein, in response to the valve opening degree of the corresponding gas distribution valve reaching the maximum valve opening degree, abnormal real-time gas supply information is output, the corresponding second fuel cell is shut down, and an equal number of other first fuel cells are enabled to be used as the second fuel cell. Further, in response to the valve opening degree of the corresponding gas distribution valve not reaching the maximum valve opening degree, valve opening degree increase control information is output to increase the valve opening degree of the corresponding gas distribution valve, so that the second gas consumption of the gas allocated to the second fuel cell is not less than the actual required gas volume.

20. The control method according to claim 1 further comprises: Monitor the pressure condition of the gas distribution pipeline for the gas distribution. Among them, monitoring the pressure condition of the gas distribution pipeline for the gas distribution includes: Obtain pressure threshold information; Periodically call the pressure data of the gas distribution pipeline and the pressure threshold information, and compare the pressure data with the pressure threshold information; In response to the pressure data not exceeding the range of the pressure threshold information, operate normally; In response to the pressure data exceeding the range of the pressure threshold information, output control information for reducing pressure or output control information for increasing pressure; Wherein, in response to the pressure data being greater than the upper limit of the pressure threshold information, output control information for reducing pressure to reduce the pressure data of the gas distribution pipeline, so that the pressure data is within the range of the pressure threshold information. And, in response to the pressure data being less than the lower limit of the pressure threshold information, output control information for increasing pressure to increase the pressure data of the gas distribution pipeline, so that the pressure data is within the range of the pressure threshold information.

21. The control method according to claim 1 further includes: Monitor the water heat dissipation cycle of the second fuel cell. Among them, monitoring the water heat dissipation cycle of the second fuel cell includes: Obtain the set working temperature range of each second fuel cell; Detect the real-time temperature of the water in the second fuel cell through the water temperature sensor built in the second fuel cell; Compare the real-time temperature of the water in the second fuel cell with the set working temperature range; In response to the real-time temperature being lower than the set working temperature range, circulate the water back to the second fuel cell through the humidifier by means of a circulation pump. And, in response to the real-time temperature not being lower than the set working temperature range, circulate the water through the radiator by means of a circulation pump, and then circulate it to the humidifier and back to the second fuel cell.

22. The control method according to claim 1 further comprises: Monitor the water volume of the circulating water of the fuel cell stack. Among them, monitoring the water volume of the circulating water of the fuel cell stack includes: Obtain the total amount of the circulating water of the fuel cell stack by monitoring the water volume of the circulating water corresponding to each second fuel cell in the fuel cell stack; Compare the total amount of the circulating water of the fuel cell stack with the normal working water demand of the fuel cell stack; In response to the total amount of the circulating water of the fuel cell stack being within the range of the normal working water demand of the fuel cell stack, circulate the circulating water back to the second fuel cell through the humidifier by means of a circulation pump; In response to the total amount of the circulating water of the fuel cell stack being less than the lower limit of the normal working water demand of the fuel cell stack, output warning information; In response to the total amount of circulating water in the fuel cell stack being higher than the upper limit of the normal working water demand of the fuel cell stack, drain the fuel cell stack until it is monitored that the total amount of circulating water in the fuel cell stack is equal to the normal working water demand of the fuel cell stack, and then stop draining.

23. A method for increasing well production based on a fuel cell, comprising: Select at least one from a plurality of first fuel cells to form a fuel cell stack for powering a well production enhancement module; And Supply gas to the fuel cell stack; Wherein each first fuel cell forming the fuel cell stack is a second fuel cell, Supplying gas to the fuel cell stack includes: Allocating gas with a first gas consumption to the fuel cell stack; Distributing the gas with the first gas consumption to each of the second fuel cells according to a battery gas distribution ratio to allocate corresponding gas with a second gas consumption; Wherein, selecting at least one from a plurality of first fuel cells to form a fuel cell stack includes: Selecting two or more from the plurality of first fuel cells to power a target device; Connecting two or more of the second fuel cells in parallel and / or in series to form the fuel cell stack; Wherein, in response to forming the fuel cell stack by connecting a plurality of the second fuel cells in parallel, it further includes: detecting the second fuel cells of the fuel cell stack, and wherein detecting the second fuel cells of the fuel cell stack includes: Obtaining an electric energy conversion threshold; Comparing the electric energy conversion efficiency of each second fuel cell in the fuel cell stack with the electric energy conversion threshold; In response to the electric energy conversion efficiency of each second fuel cell in the fuel cell stack not exceeding the range of the electric energy conversion threshold, obtaining the average value of the electric energy conversion efficiencies of all the second fuel cells in the fuel cell stack; In response to the electric energy conversion efficiency of at least one second fuel cell in the fuel cell stack exceeding the range of the electric energy conversion threshold, it includes: Comparing the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold with the upper limit of the electric energy conversion threshold, In response to the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold being greater than the upper limit of the electric energy conversion threshold, outputting a warning message, and in response to the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold being less than the lower limit of the electric energy conversion threshold, shutting down and marking the corresponding second fuel cell and enabling an equal number of other first fuel cells to be used as the second fuel cell.

24. The well site stimulation method according to claim 23, wherein, The well production enhancement module includes a fracturing device and / or a sand mixing device.

25. A control device based on a fuel cell, comprising: A plurality of first fuel cells, including at least one first fuel cell selected to form a fuel cell stack, wherein each first fuel cell forming the fuel cell stack is a second fuel cell; A first controller configured to select at least one from the plurality of first fuel cells to form the fuel cell stack; A gas supply module, wherein the gas supply module includes: A gas distribution pipeline, comprising a main gas distribution pipeline and at least one branch gas distribution pipeline that diverts the main gas distribution pipeline, wherein the main gas distribution pipeline is configured to transport gas for a first gas consumption of the fuel cell stack; At least one gas distribution valve, disposed on the at least one branch gas distribution pipeline and configured to distribute gas to each of the second fuel cells in the fuel cell stack; A second controller, configured to control the valve opening of each of the at least one gas distribution valve to control the distribution of the gas with the first gas consumption to each of the second fuel cells according to the battery gas distribution ratio of the fuel cell stack, respectively, with a corresponding second gas consumption; There are more than two second fuel cells in the fuel cell stack, and the more than two second fuel cells are connected in parallel and / or in series to form the fuel cell stack to supply power to a target device; In response to forming the fuel cell stack by connecting a plurality of the second fuel cells in parallel, the second fuel cells of the fuel cell stack are also detected; wherein, detecting the second fuel cells of the fuel cell stack includes: Obtaining an electric energy conversion threshold; Comparing the electric energy conversion efficiency of each second fuel cell in the fuel cell stack with the electric energy conversion threshold; In response to the electric energy conversion efficiency of each second fuel cell in the fuel cell stack not exceeding the range of the electric energy conversion threshold, obtaining the average value of the electric energy conversion efficiencies of all the second fuel cells in the fuel cell stack; In response to the electric energy conversion efficiency of at least one second fuel cell in the fuel cell stack exceeding the range of the electric energy conversion threshold, including: Comparing the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold with the upper limit of the electric energy conversion threshold, In response to the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold being greater than the upper limit of the electric energy conversion threshold, outputting a warning message, and in response to the electric energy conversion efficiency exceeding the range of the electric energy conversion threshold being less than the lower limit of the electric energy conversion threshold, shutting down and marking the corresponding second fuel cell and enabling an equal number of other first fuel cells to be used as the second fuel cell.

26. The control device according to claim 25, wherein, The at least one gas distribution valve corresponds to the at least one branch gas distribution pipeline one by one and the at least one gas distribution valve corresponds to the second fuel cells of the fuel cell stack one by one.

27. The control device according to claim 25, wherein, The target device includes one or more well site stimulation modules.

28. The control device according to claim 25 or 27, further comprising a power distribution module, wherein, The input end of the power distribution module is connected to the output end of each of the second fuel cells in the fuel cell stack, and the output end of the power distribution module is connected to the target device to distribute power to the target device.

29. The control device according to claim 25, further comprising an energy storage device, wherein, The energy storage device includes one or more energy storage units and the energy storage device is configured to: supply energy for the startup of the fuel cell stack and / or be charged by the fuel cell stack.

30. The control device according to claim 25 further includes an air source unit, wherein, The main gas distribution pipeline of the gas distribution module is connected to the gas source unit.

31. The control device according to claim 30 further includes a buffer unit, wherein, The buffer unit is arranged on the main gas distribution pipeline.

32. The control device according to claim 31, wherein, The buffer unit includes a gas storage tank.

33. The control device according to claim 25 or 27 further includes a water treatment unit and a filtration unit, wherein, the output end of the water treatment unit is connected to the filtration unit, and the output end of the filtration unit is respectively connected to the target device and the fuel cell stack, so as to collect and regulate the temperature of the water separated by the filtration unit and supply it to the target device and the fuel cell stack.

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