CN117577888B - Hydrogen supply system, hydrogen supply method, and storage medium - Google Patents

Abstract

The application provides a hydrogen supply system, a hydrogen supply method and a storage medium, and relates to the technical field of energy. On the basis of the traditional first hydrogen supply branch, the hydrogen supply system converts a single hydrogen supply branch into two paths of hydrogen supply by adding the hydrogen flow dividing valve and the second hydrogen supply branch, solves the problems that the single hydrogen supply branch is difficult to adjust rapidly and has low response and insufficient hydrogen supply amount under the condition of high-power load operation, and can be matched with the second hydrogen supply branch to supply residual needed hydrogen to the fuel cell. The second hydrogen supply branch is additionally provided with a flow regulating valve, so that the opening degree of the flow regulating valve can be controlled to control the outlet hydrogen flow of the second hydrogen supply branch, and the accurate control of the hydrogen flow entering the fuel cell is realized. The hydrogen supply method can complete hydrogen supply by controlling the first hydrogen supply branch and/or the second hydrogen supply branch in a matched manner, and can realize accurate control of hydrogen supply by setting the second hydrogen supply branch with adjustable hydrogen flow.

Description

Hydrogen supply system, hydrogen supply method, and storage medium

Technical Field

The present application relates to the field of energy technologies, and in particular, to a hydrogen supply system, a hydrogen supply method, and a storage medium.

Background

The hydrogen fuel supply system is an important constituent system of the hydrogen fuel cell, and mainly provides medium-pressure hydrogen gas of less than 2MPa for the electric pile.

The pressure reducing valve used in the existing hydrogen supply system is a constant pressure reducing valve, and in the whole hydrogen supply process, the pressure of the pressure reducing valve is constant, so that the quantity of hydrogen which enters into the fuel cell system and reacts with the fuel cell system is in a basically unchanged state, and the hydrogen supply requirements under different operating powers are difficult to meet.

Therefore, the current stage mainly depends on the power battery or the super capacitor to regulate the electric quantity generated by the fuel battery so as to meet the running condition of the whole system. However, the control system implementing this method is complex, and the requirement for the control system is high, resulting in high cost.

Disclosure of Invention

The present application aims to provide a hydrogen supply system, a hydrogen supply method and a storage medium for overcoming the defects in the prior art, so as to realize accurate control of hydrogen flow in the hydrogen supply system and improve response performance of a fuel cell.

In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

in a first aspect, embodiments of the present application provide a hydrogen supply system, including: the hydrogen supply unit, the hydrogen flow dividing valve, the hydrogen flow regulating unit and the hydrogen system controller; the hydrogen flow regulating unit is respectively connected with the hydrogen supply unit and the fuel cell; the hydrogen system controller is connected with the hydrogen flow regulating unit;

The hydrogen supply unit is used for conveying hydrogen to the hydrogen flow regulating unit;

the hydrogen flow regulating unit is used for regulating the flow of the hydrogen conveyed by the hydrogen supply unit and outputting the hydrogen to the fuel cell;

the hydrogen flow regulating unit comprises a first hydrogen supply branch and a second hydrogen supply branch; the first hydrogen supply branch comprises a first pressure reducing valve and a first flowmeter; the second hydrogen supply branch comprises a second pressure reducing valve, a flow regulating valve and a second flowmeter;

the hydrogen flow dividing valve is used for balancing the pressure of the hydrogen flowing out of the hydrogen supply unit and distributing the hydrogen flow of the first hydrogen supply branch and the second hydrogen supply branch;

the hydrogen system controller is used for collecting the required power of the load and determining the operation scene of the load and the hydrogen flow required by the fuel cell according to the required power; according to the operation scene, controlling a hydrogen supply branch corresponding to the operation scene to output hydrogen with required flow to the fuel cell; the hydrogen supply branch comprises the first hydrogen supply branch and/or the second hydrogen supply branch.

Optionally, the system further comprises: a power domain controller; the power domain controller is connected with the hydrogen system controller;

The power domain controller is used for sending a secondary regulation instruction to the hydrogen system controller according to the output power and the required power of the load so as to instruct the hydrogen system controller to regulate and control hydrogen supply by controlling the second hydrogen supply branch.

Optionally, the system further comprises: the gas-water separation device is respectively connected with the fuel cell and the hydrogen ejector; the hydrogen ejector is also connected to the second hydrogen supply branch;

the gas-water separation device is used for collecting unreacted hydrogen of the fuel cell, and after gas-water separation, the separated hydrogen is led into the second hydrogen supply branch through the hydrogen ejector.

Optionally, the hydrogen supply unit includes: a gas cylinder group, an integrated bottleneck valve and a filter; the gas cylinder group, the integrated bottleneck valve and the filter are connected in sequence;

the gas cylinder group comprises a plurality of gas cylinders, and each gas cylinder adopts a plastic liner carbon fiber fully-wound cylinder;

hydrogen in each gas cylinder in the gas cylinder group flows through the filter through the integrated bottleneck valve;

the filter is used for filtering the hydrogen flowing through.

In a second aspect, an embodiment of the present application further provides a hydrogen supply method, which is applied to the hydrogen system controller in the hydrogen supply system in any one of the first aspect, where the method includes:

the method comprises the steps of collecting the required power of a load, and determining the operation scene of the load and the hydrogen flow required by a fuel cell according to the required power;

according to the operation scene, controlling a hydrogen supply branch corresponding to the operation scene to output hydrogen with required flow to a fuel cell; the hydrogen supply branch comprises a first hydrogen supply branch and/or a second hydrogen supply branch.

Optionally, the controlling the hydrogen supply branch corresponding to the operation scene to output the hydrogen with the required flow to the fuel cell according to the operation scene includes:

if the operation scene of the load is a high-power operation scene, outputting hydrogen with a first flow to the fuel cell by controlling the opening degree of a first pressure reducing valve in the first hydrogen supply branch;

determining a second flow rate according to the hydrogen flow rate required by the operation of the fuel cell and the first flow rate;

and controlling the opening degree of a second pressure reducing valve and a flow regulating valve in the second hydrogen supply branch according to the second flow, and outputting the hydrogen with the second flow to the fuel cell.

Optionally, the controlling the hydrogen supply branch corresponding to the operation scene to output the hydrogen with the required flow to the fuel cell according to the operation scene includes:

and if the operation scene of the load is a low-power operation scene, controlling the opening of a second pressure reducing valve and a flow regulating valve in the second hydrogen supply branch according to the hydrogen flow required by the operation of the fuel cell, and outputting the required hydrogen flow to the fuel cell.

Optionally, the method further comprises:

receiving the outlet hydrogen flow of the second hydrogen supply branch fed back by a second flowmeter;

if the outlet hydrogen flow of the second hydrogen supply branch does not reach the second flow in the high-power operation scene, controlling the opening of a flow regulating valve in the second hydrogen supply branch, and regulating the outlet hydrogen flow in the second hydrogen supply branch;

and if the outlet hydrogen flow of the second hydrogen supply branch does not reach the required hydrogen flow under the low-power operation scene, controlling the opening of a flow regulating valve in the second hydrogen supply branch to regulate the outlet hydrogen flow in the second hydrogen supply branch.

Optionally, the method further comprises:

Receiving secondary regulation indicating information sent by a power domain controller, wherein the secondary regulation indicating information comprises: the difference between the required power and the actual output power of the load;

determining hydrogen of target flow corresponding to secondary regulation according to the secondary regulation indication information;

and controlling the opening degree of a flow regulating valve in the second hydrogen supply branch according to the target flow of hydrogen, and outputting the target flow of hydrogen to the fuel cell.

In a third aspect, embodiments of the present application provide a hydrogen supply apparatus, including: the acquisition module and the control module;

the acquisition module is used for acquiring the required power of the load and determining the operation scene of the load and the hydrogen flow required by the fuel cell according to the required power;

the control module is used for controlling the hydrogen supply branch corresponding to the operation scene to output the hydrogen with the required flow to the fuel cell according to the operation scene; the hydrogen supply branch comprises a first hydrogen supply branch and/or a second hydrogen supply branch.

Optionally, the control module is specifically configured to output a first flow of hydrogen to the fuel cell by controlling an opening of a first pressure reducing valve in the first hydrogen supply branch if the operation scenario of the load is a high-power operation scenario;

Determining a second flow rate according to the hydrogen flow rate required by the operation of the fuel cell and the first flow rate;

and controlling the opening degree of a second pressure reducing valve and a flow regulating valve in the second hydrogen supply branch according to the second flow, and outputting the hydrogen with the second flow to the fuel cell.

Optionally, the control module is specifically configured to control the opening degrees of the second pressure reducing valve and the flow regulating valve in the second hydrogen supply branch according to the hydrogen flow required by the operation of the fuel cell if the operation scenario of the load is a low-power operation scenario, and output the required hydrogen flow to the fuel cell.

Optionally, the method further comprises: a receiving module;

the receiving module is used for receiving the outlet hydrogen flow of the second hydrogen supply branch fed back by the second flowmeter;

the control module is specifically configured to control an opening of a flow regulating valve in the second hydrogen supply branch if the outlet hydrogen flow of the second hydrogen supply branch does not reach the second flow in the high-power operation scenario, and regulate the outlet hydrogen flow in the second hydrogen supply branch;

the control module is specifically configured to control an opening of the flow regulating valve in the second hydrogen supply branch if the outlet hydrogen flow of the second hydrogen supply branch does not reach the required hydrogen flow in the low-power operation scenario, and regulate the outlet hydrogen flow in the second hydrogen supply branch.

Optionally, the method further comprises: a determining module;

the receiving module is further configured to receive secondary adjustment indication information sent by the power domain controller, where the secondary adjustment indication information includes: the difference between the required power and the actual output power of the load;

the determining module is used for determining hydrogen of target flow corresponding to secondary regulation according to the secondary regulation indication information;

the control module is specifically configured to control an opening of the flow regulating valve in the second hydrogen supply branch according to the target flow of hydrogen, and output the target flow of hydrogen to the fuel cell.

In a fourth aspect, an embodiment of the present application provides an electronic device, including: the hydrogen supply system includes a processor, a storage medium, and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor in communication with the storage medium via the bus when the electronic device is operating, the processor executing the machine-readable instructions to implement the hydrogen supply method as provided in the second aspect.

In a fifth aspect, embodiments of the present application provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs a hydrogen supply method as provided in the second aspect.

The beneficial effects of this application are:

the utility model provides a hydrogen supply system, hydrogen supply method and storage medium, this hydrogen supply system is on traditional first hydrogen supply branch road's basis, through increasing hydrogen shunt valve and second hydrogen supply branch road, changes single hydrogen supply branch road into two way hydrogen supply, under the scene of load high power operation, the single branch road that has solved supplies hydrogen monotone and is difficult to quick adjustment and respond slowly, the problem that the hydrogen supply volume is not enough can cooperate to use the second hydrogen supply branch road to provide remaining required hydrogen for fuel cell. The second hydrogen supply branch is additionally provided with a flow regulating valve, so that the opening degree of the flow regulating valve can be controlled to control the outlet hydrogen flow of the second hydrogen supply branch, and the accurate control of the hydrogen flow entering the fuel cell is realized.

Secondly, through setting up the hydrogen flow divider, can balance the pressure of the hydrogen that flows in each gas bomb, can distribute the hydrogen according to different demands in different first hydrogen supply branch road and the second hydrogen supply branch road. And the hydrogen diverter valve can also play the effect of safety protection, and when the system appears unusual circumstances, the diverter valve can automatic shutdown or adjust the aperture, prevents hydrogen leakage or avoids the accident to enlarge.

In addition, by arranging the gas-water separation device and the hydrogen ejector, unreacted hydrogen at the anode in the fuel cell can be collected into the second hydrogen supply branch to recycle resources, and parasitic power in the hydrogen circulation process is eliminated.

The hydrogen supply method is applied to a hydrogen supply system, a second hydrogen supply branch is additionally arranged on the basis of a first hydrogen supply branch, and the outlet hydrogen flow of the second hydrogen supply branch is adjustable, so that under different operation scenes of loads, the hydrogen supply can be completed by controlling the first hydrogen supply branch and/or the second hydrogen supply branch in cooperation, and the accurate control of the hydrogen supply can be realized by setting the second hydrogen supply branch with adjustable hydrogen flow. Compared with the traditional constant hydrogen supply, the method can meet the hydrogen supply requirements under different operation scenes of the load, and ensures the stable operation of the load.

In addition, through the dual regulation mechanism of the power domain controller and the hydrogen system controller, the accurate control and supply of the hydrogen flow guided by power can be realized, and the response rate of the fuel cell is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a hydrogen supply system according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of another hydrogen supply system according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a hydrogen supply system according to an embodiment of the present disclosure;

FIG. 4 is a schematic flow chart of a hydrogen supplying method according to an embodiment of the present disclosure;

FIG. 5 is a schematic flow chart of another hydrogen supplying method according to an embodiment of the present application;

FIG. 6 is a schematic flow chart of another hydrogen supplying method according to an embodiment of the present application;

FIG. 7 is a schematic flow chart of another hydrogen supplying method according to an embodiment of the present application;

FIG. 8 is a schematic view of a hydrogen supply apparatus according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it should be understood that the accompanying drawings in the present application are only for the purpose of illustration and description, and are not intended to limit the protection scope of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. A flowchart, as used in this application, illustrates operations implemented according to some embodiments of the present application. It should be understood that the operations of the flow diagrams may be implemented out of order and that steps without logical context may be performed in reverse order or concurrently. Moreover, one or more other operations may be added to the flow diagrams and one or more operations may be removed from the flow diagrams as directed by those skilled in the art.

In addition, the described embodiments are only some, but not all, of the embodiments of the present application. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the presence of the features stated hereinafter, but not to exclude the addition of other features.

The hydrogen energy is used as a clean energy source, has the characteristics of high fuel calorific value and no pollutant emission, and the hydrogen fuel cell is used as a hydrogen energy utilization mode, has the advantage of high energy conversion efficiency, is convenient to obtain fuel in the operation process, has short supplementing time, only generates water in the reaction process, and is environment-friendly.

The hydrogen fuel supply system is used as an important composition system of the hydrogen fuel cell and mainly provides medium-pressure hydrogen for the galvanic pile, and the current common hydrogen fuel supply system mainly comprises a hydrogen storage device, a bottleneck valve, a pressure reducing valve, a hydrogen filtering device, a safety valve and the like, wherein the hydrogen in the hydrogen storage device passes through the bottleneck valve, the filtering device and the pressure reducing valve and then enters the galvanic pile to participate in the reaction.

However, the pressure reducing valve used in the hydrogen fuel supply system commonly used at present is a constant pressure reducing valve, and the pressure of the pressure reducing valve is constant during the whole hydrogen supply process, so that the amount of hydrogen which enters the fuel cell system and reacts with the fuel is in a substantially constant state, which makes the whole fuel cell respond slowly, and makes it difficult for the power supplied by the fuel cell to change with the demand during the running of the vehicle.

Aiming at the situation that the current hydrogen fuel supply system is difficult to meet the requirement due to constant hydrogen flow supply, the current stage mainly depends on a power battery or a super capacitor to adjust the electric quantity generated by the fuel battery so as to meet the running condition of the whole system.

But the mode is unfavorable for the whole vehicle structural arrangement, and simultaneously, the system is redundant and the space utilization rate is low. Meanwhile, at the present stage, the hydrogen storage device mainly uses an aluminum liner carbon fiber fully-wound bottle, and the stored hydrogen amount is small, so that the system endurance mileage is mainly limited to a medium-short range.

Based on the above, the hydrogen supply system and the hydrogen supply method provided by the scheme are characterized in that the flow regulating branch is added on the basis of the original hydrogen supply system, the constant-pressure hydrogen supply branch of the original hydrogen supply system outputs hydrogen with fixed flow to the fuel cell, the opening of the flow regulating valve of the flow regulating branch is controlled to output residual hydrogen to the fuel cell, and the outlet hydrogen flow fed back by the flow regulating branch can be regulated to regulate the flow regulating branch so as to correct the outlet hydrogen flow of the flow regulating branch, so that the hydrogen flow entering the electric pile is accurately controlled.

In addition, by monitoring the output power of the fuel cell, closed-loop control can be performed according to the difference between the output power and the required power, so that secondary regulation is realized. Therefore, the flow regulation and control in the whole operation process of the hydrogen supply system can be realized, and the flow in the whole operation process can be monitored in real time.

FIG. 1 is a schematic diagram of a hydrogen supply system according to an embodiment of the present disclosure; as shown in fig. 1, the system may include: the hydrogen supply unit, the hydrogen flow dividing valve, the hydrogen flow regulating unit and the hydrogen system controller; the hydrogen flow regulating unit is respectively connected with the hydrogen supply unit and the fuel cell; the hydrogen system controller is connected with the hydrogen flow regulating unit.

The hydrogen supply unit is used for conveying hydrogen to the hydrogen flow regulating unit; the hydrogen flow regulating unit is used for regulating the flow of the hydrogen conveyed by the hydrogen supply unit and outputting the hydrogen to the fuel cell, and the hydrogen entering the fuel cell can participate in the reaction and generate electricity for load operation. In this embodiment, the load may be a vehicle.

The hydrogen flow regulating unit comprises a first hydrogen supply branch and a second hydrogen supply branch; the first hydrogen supply branch comprises a first pressure reducing valve and a first flowmeter; the second hydrogen supply branch comprises a second pressure reducing valve, a flow regulating valve and a second flowmeter.

The first pressure reducing valve of the first hydrogen supply branch may be a constant pressure reducing valve, and the first hydrogen supply branch is configured to output a fixed flow of hydrogen to the fuel cell. The second hydrogen supply branch comprises a flow regulating valve, and the opening degree of the flow regulating valve is controlled to supply the hydrogen with the specified flow to the fuel cell.

Under the high-power load operation scene, because the required power is higher, the required hydrogen flow of the fuel cell is larger, only the first hydrogen supply branch is used for providing hydrogen for the fuel cell, and the regulation kinetic energy of the system is difficult to meet, at the moment, the second hydrogen supply branch is matched and controlled to provide residual flow of hydrogen for the fuel cell, so that the accurate control of the hydrogen flow entering the fuel cell is realized.

The hydrogen flow dividing valve is used for balancing the pressure of the hydrogen flowing out of the hydrogen supply unit and distributing the flow of the hydrogen flowing into the first hydrogen supply branch and the second hydrogen supply branch.

The hydrogen filtered by the filter flows to a hydrogen diverter valve, and the hydrogen diverter valve is used for balancing the pressure of the hydrogen flowing out of the gas storage bottle. And the hydrogen flow dividing valve is also used for dividing the flow of the hydrogen flowing into the first hydrogen supply branch and the second hydrogen supply branch.

The hydrogen flows out of the hydrogen flow dividing valve and then enters the first hydrogen supply branch and/or the second hydrogen supply branch, if the first hydrogen supply branch and the second hydrogen supply branch are in an open state, the hydrogen can flow into the first hydrogen supply branch and the second hydrogen supply branch respectively, and the first hydrogen supply branch and the second hydrogen supply branch are matched together to supply hydrogen to the fuel cell; if the first hydrogen supply branch is opened and the second hydrogen supply branch is closed, only the first hydrogen supply branch flows into, and hydrogen is provided for the fuel cell by the first hydrogen supply branch; if the first hydrogen supply branch is closed and the second hydrogen supply branch is opened, only the second hydrogen supply branch flows into, and hydrogen is provided for the fuel cell by the second hydrogen supply branch.

The hydrogen system controller is used for collecting the required power of the load and determining the operation scene of the fuel cell and the hydrogen flow required by the operation of the fuel cell according to the required power; according to the operation scene, controlling a hydrogen supply branch corresponding to the operation scene to output hydrogen with required flow to the fuel cell; the hydrogen supply branch comprises a first hydrogen supply branch and/or a second hydrogen supply branch.

The hydrogen system controller is used for collecting the required power of the load, judging the operation scene of the load, and controlling the hydrogen supply branch corresponding to the operation scene to work so as to provide hydrogen for the fuel cell.

In this embodiment, in a load high-power operation scenario, the hydrogen demand flow of the fuel cell is relatively large, and the hydrogen system controller may control the first hydrogen supply branch and the second hydrogen supply branch to be opened simultaneously, and supply the hydrogen with a fixed flow to the fuel cell by controlling the first pressure reducing valve in the first hydrogen supply branch. And the hydrogen system controller can receive the outlet hydrogen flow of the second hydrogen supply branch fed back by the second flow meter in the second hydrogen supply branch by controlling the flow regulating valve in the second hydrogen supply branch to supply residual flow to the fuel cell, so that the second hydrogen supply branch is regulated when the outlet hydrogen flow does not reach the condition, and the accurate control of the hydrogen flow entering the fuel cell is realized.

In addition, the hydrogen system controller can monitor the hydrogen flow entering the fuel cell according to the outlet flow of the first hydrogen supply branch fed back by the first flow meter in the first hydrogen supply branch and the outlet flow of the second hydrogen supply branch fed back by the second flow meter in the second hydrogen supply branch.

In summary, the hydrogen supply system provided in this embodiment adds the second hydrogen supply branch on the basis of the conventional first hydrogen supply branch, so that in the scenario of high-power load operation, a single hydrogen supply branch is converted into two hydrogen supply branches by adding the hydrogen flow dividing valve and the second hydrogen supply branch, and in the scenario of high-power load operation, the problems that the single hydrogen supply branch is difficult to be adjusted rapidly, the response is slow, and the hydrogen supply amount is insufficient due to monotonous hydrogen supply are solved, and the second hydrogen supply branch can be matched to provide residual required hydrogen for the fuel cell. The second hydrogen supply branch is additionally provided with a flow regulating valve, so that the opening degree of the flow regulating valve can be controlled to control the outlet hydrogen flow of the second hydrogen supply branch, and the accurate control of the hydrogen flow entering the fuel cell is realized.

FIG. 2 is a schematic diagram of another hydrogen supply system according to an embodiment of the present disclosure; as shown in fig. 2, the system may further include: a power domain controller; the power domain controller is connected with the hydrogen system controller.

The power domain controller is used for sending a secondary regulation instruction to the hydrogen system controller according to the output power and the required power of the load so as to instruct the hydrogen system controller to regulate and control hydrogen supply by controlling the second hydrogen supply branch.

The hydrogen flow regulating unit provides the hydrogen with required flow to the fuel cell, and the hydrogen can participate in internal reaction after entering the fuel cell, so that electric energy is generated to power the load.

Since the electric energy generated by the fuel cell has a mapping relationship with the output power of the load, the output power of the load can be calculated. The power domain controller can judge whether the difference between the output power and the demand power meets the conditions according to the output power and the demand power of the load, and if the difference between the output power and the demand power does not meet the conditions (when the difference between the output power and the demand power is large), a secondary regulation instruction can be sent to the hydrogen system controller, so that the hydrogen system controller controls the second hydrogen supply branch to continuously supply hydrogen to the fuel cell, the output power of the load can reach the demand power as much as possible, and the guarantee is provided for the stable operation of the load.

The power domain controller may refer to a vehicle controller.

Optionally, continuing with fig. 2, the system further comprises: the gas-water separation device is respectively connected with the fuel cell and the hydrogen ejector, and the hydrogen ejector is also connected to the second hydrogen supply branch.

In some embodiments, one end of the gas-water separation device is connected to the anode of the fuel cell and the other end of the gas-water separation device is connected to the hydrogen injector. And the other end of the hydrogen injector can be connected to the second hydrogen supply branch, preferably between the second pressure reducing valve and the flow regulating valve in the second hydrogen supply branch.

The gas-water separation device is used for collecting unreacted hydrogen in the anode of the fuel cell, filtering water in the unreacted hydrogen after gas-water separation, and collecting the separated hydrogen into the second hydrogen supply branch through the hydrogen ejector.

Optionally, the separated hydrogen can be led into the flow regulating valve in the second hydrogen supply branch through the hydrogen ejector, so that the hydrogen can be recycled, and the waste of hydrogen energy sources is reduced.

Alternatively, continuing to refer to FIG. 2, the hydrogen supply unit may comprise: the device comprises a gas cylinder group, an integrated bottleneck valve, a filter and a hydrogen gas flow dividing valve; the gas cylinder group, the integrated bottleneck valve, the filter and the hydrogen gas flow dividing valve are connected in sequence.

The gas cylinder group comprises a plurality of gas cylinders, and each gas cylinder adopts a plastic liner carbon fiber fully-wound cylinder.

In this embodiment, a gas cylinder set may be used to supply high-pressure hydrogen, so as to increase the hydrogen supply amount and increase the endurance of the load. The gas cylinder group comprises at least two high-pressure gas cylinders, and each high-pressure gas cylinder can adopt a plastic liner carbon fiber fully-wound cylinder with higher capacity.

Hydrogen in each gas cylinder in the gas cylinder group flows through the filter through the integrated bottleneck valve. The rear end of the gas cylinder group can be connected with an integrated bottleneck valve. After flowing out of the gas cylinder group, the hydrogen passes through the integrated bottleneck valve and the high-pressure pipeline and then reaches the filter. The filter is used for filtering the hydrogen flowing through.

FIG. 3 is a schematic diagram of a hydrogen supply system according to an embodiment of the present disclosure; fig. 3 shows in detail the specific structure of the hydrogen supply system. In addition to the structures mentioned in the above embodiments, the first hydrogen supply branch may further include a first pressure sensor, and the second hydrogen supply branch may further include a second pressure sensor. The first pressure sensor and the second pressure sensor are both connected with a hydrogen system controller.

The first pressure sensor is used for collecting the outlet hydrogen pressure of the first hydrogen supply branch, the second pressure sensor is used for collecting the outlet hydrogen pressure of the second hydrogen supply branch, the first pressure sensor and the second pressure sensor can respectively send collected pressure information to the hydrogen system controller, and accordingly the hydrogen system controller can detect the outlet hydrogen pressure of the hydrogen supply system in real time, when the pressure exceeds a certain threshold value, safety early warning is conducted, and pipeline bursting and the like are prevented.

The hydrogen flows through the filter after passing through the integrated bottleneck valve by the gas cylinder group, then reaches the hydrogen diverter valve to carry out diversion flow preliminary control, and the hydrogen is divided into two paths after passing through the diverter valve, wherein the first hydrogen supply branch is a fixed flow supply branch, and the second hydrogen supply branch is a flow regulation branch.

The first hydrogen supply branch comprises a high-pressure pipeline section in front of the first pressure reducing valve, the first pressure reducing valve and a medium-pressure pipeline section behind the first pressure reducing valve, and the pressure and the flow of hydrogen output by the first pressure reducing valve are respectively monitored in real time by a first pressure sensor and a first flow meter behind the first pressure reducing valve and are transmitted to the hydrogen system controller.

The second hydrogen supply branch circuit mainly comprises a second pressure reducing valve, a hydrogen ejector, a flow regulating valve, a second pressure sensor behind the flow regulating valve and a second flowmeter. In addition, the system also collects unreacted hydrogen at the anode of the fuel cell, and the collected hydrogen is separated by the gas-water separation device and then is collected into the flow regulating branch by the hydrogen ejector.

In summary, in the hydrogen supply system provided in this embodiment, on the basis of the conventional first hydrogen supply branch, by adding the hydrogen flow dividing valve and the second hydrogen supply branch, a single hydrogen supply branch is converted into two paths of hydrogen supply, so that the problems that the single branch is difficult to quickly adjust and respond slowly due to the monotone hydrogen supply and the hydrogen supply quantity is insufficient in the high-power load operation are solved, and the second hydrogen supply branch can be matched to provide the residual required hydrogen for the fuel cell. The second hydrogen supply branch is additionally provided with a flow regulating valve, so that the opening degree of the flow regulating valve can be controlled to control the outlet hydrogen flow of the second hydrogen supply branch, and the accurate control of the hydrogen flow entering the fuel cell is realized.

Secondly, through setting up the hydrogen flow divider, can balance the pressure of the hydrogen that flows in each gas bomb, can distribute the hydrogen according to different demands in different first hydrogen supply branch road and the second hydrogen supply branch road. And the hydrogen diverter valve can also play the effect of safety protection, and when the system appears unusual circumstances, the diverter valve can automatic shutdown or adjust the aperture, prevents hydrogen leakage or avoids the accident to enlarge.

In addition, by arranging the gas-water separation device and the hydrogen ejector, unreacted hydrogen at the anode in the fuel cell can be collected into the second hydrogen supply branch to recycle resources, and parasitic power in the hydrogen circulation process is eliminated.

Fig. 4 is a schematic flow chart of a hydrogen supply method according to an embodiment of the present application, where the method may be applied to the hydrogen system controller in the hydrogen supply system, as shown in fig. 4, and the method may include:

s401, collecting the required power of the load, and determining the operation scene of the load and the hydrogen flow required by the fuel cell according to the required power.

The method can be divided into a load high-power operation scene and a load low-power operation scene according to different required power of the load, and can respectively determine the hydrogen flow required by the fuel cell in the load high-power operation scene and the hydrogen flow required by the fuel cell in the load low-power operation scene according to the corresponding relation between the required power and the hydrogen flow requirement.

S402, controlling a hydrogen supply branch corresponding to an operation scene to output hydrogen with required flow to the fuel cell according to the operation scene; the hydrogen supply branch comprises a first hydrogen supply branch and/or a second hydrogen supply branch.

When the load runs under the scenes of full load transportation, climbing, acceleration, overtaking and the like, the power demand of the load is higher, the load can be determined to be a high-power running scene, at the moment, the hydrogen demand flow of the fuel cell is large, the hydrogen passes through a bottleneck valve from a gas cylinder group, the hydrogen reaches a hydrogen flow dividing valve after a filter, the hydrogen flow dividing valve opens a first hydrogen supply branch and a second hydrogen supply branch connecting port simultaneously, the first hydrogen supply branch mainly supplies hydrogen, the first hydrogen supply branch only can supply hydrogen with fixed flow, and the residual flow of hydrogen is supplied and flow regulated by the second hydrogen supply branch.

When the load runs in the scenes such as no load or a flat road, the power demand of the load is lower, the load can be determined to be in a low-power running scene, at the moment, the fuel cell has small hydrogen demand flow, hydrogen passes through a bottleneck valve from a gas cylinder group, reaches a hydrogen flow dividing valve after passing through a filter, the hydrogen flow dividing valve only opens a valve port of a second hydrogen supply branch, and hydrogen is supplied by the second hydrogen supply branch.

In summary, the hydrogen supply method provided in this embodiment is applied to a hydrogen supply system, where a second hydrogen supply branch is added to the hydrogen supply system based on a first hydrogen supply branch, and the outlet hydrogen flow of the second hydrogen supply branch is adjustable, so that under different operating scenarios of loads, hydrogen supply can be completed by controlling the first hydrogen supply branch and/or the second hydrogen supply branch in cooperation, and accurate control of hydrogen supply can be achieved by setting the second hydrogen supply branch with adjustable hydrogen flow. Compared with the traditional constant hydrogen supply, the method can meet the hydrogen supply requirements under different operation scenes of the load, and ensures the stable operation of the load.

Fig. 5 is a schematic flow chart of another hydrogen supply method according to the embodiment of the present application, optionally, in step S402, according to an operation scenario, controlling a hydrogen supply branch corresponding to the operation scenario to output a hydrogen with a required flow to a fuel cell may include:

s501, if the operation scenario of the load is a high-power operation scenario, outputting a first flow rate of hydrogen to the fuel cell by controlling the opening of the first pressure reducing valve in the first hydrogen supply branch.

When the load is in a high-power operation scene, the hydrogen system controller can control the opening of the first pressure reducing valve in the first hydrogen supply branch, after hydrogen flows through the first pressure reducing valve, the outlet flow is a constant value, and the constant value can be a first flow, so that the first hydrogen supply branch outputs the hydrogen with the first flow to the fuel cell.

S502, determining a second flow according to the hydrogen flow required by the operation of the fuel cell and the first flow.

The first hydrogen supply branch is used for supplying hydrogen, so that the regulation kinetic energy of the system is difficult to meet, and the second hydrogen supply branch can be controlled in a matched mode to supply hydrogen.

The second flow, i.e. the flow of residual hydrogen to be supplied by the second hydrogen supply branch, may be determined based on the required hydrogen flow and the first flow.

And S503, controlling the opening of the second pressure reducing valve and the opening of the flow regulating valve in the second hydrogen supply branch according to the second flow, and outputting the hydrogen with the second flow to the fuel cell.

Then, after the hydrogen flowing into the second hydrogen supply branch passes through the second pressure reducing valve, the high-pressure hydrogen flowing out of the gas storage bottle can be converted into medium-pressure hydrogen which can be used by the fuel cell, and then the hydrogen system controller controls the flow regulating valve to regulate the hydrogen flow so that the hydrogen flowing out of the flow regulating valve after regulation reaches the second flow, thereby the first hydrogen supply branch and the second hydrogen supply branch jointly complete hydrogen supply under a high-power scene.

The second flowmeter in the second hydrogen supply branch can collect the hydrogen flow rate after the flow regulating valve (the outlet hydrogen flow rate of the second hydrogen supply system) and feed the hydrogen flow rate back to the hydrogen system controller, and if the hydrogen flow rate after the flow regulating valve does not reach the second flow rate, the flow regulating valve is continuously regulated until the hydrogen flow rate after the flow regulating valve is regulated to the second flow rate. Through the flow regulation of the second hydrogen supply branch, the accurate control of the flow of the hydrogen finally entering the fuel cell can be realized.

Optionally, unreacted hydrogen collected from the anode of the fuel cell is collected into the second hydrogen supply branch before the flow regulating valve, so that on one hand, the recycling of resources can be performed, and on the other hand, the influence on the hydrogen flow supply can be reduced, and the interference on the outlet flow of the second hydrogen supply branch can be avoided.

Optionally, in step S402, according to the operation scenario, controlling the hydrogen supply branch corresponding to the operation scenario to output the hydrogen with the required flow to the fuel cell may include: and if the operation scene of the load is a low-power operation scene, controlling the opening of a second pressure reducing valve and a flow regulating valve in the second hydrogen supply branch according to the hydrogen flow required by the operation of the fuel cell, and outputting the required hydrogen flow to the fuel cell.

In the low-power operation scene of the load, the hydrogen is supplied only by adopting the second hydrogen supply branch because the demand for the hydrogen flow is lower.

Optionally, after the hydrogen flows through the second pressure reducing valve of the second hydrogen supply branch, the high-pressure hydrogen flowing out of the gas storage bottle can be converted into medium-pressure hydrogen which can be used by the fuel cell, and then the medium-pressure hydrogen is regulated to the required hydrogen flow under low power by the flow regulating valve for output. The hydrogen system controller can control the outlet hydrogen flow of the second hydrogen supply branch by controlling the opening of the flow regulating valve in the second hydrogen supply branch so as to enable the outlet hydrogen flow to reach the hydrogen flow required by the fuel cell under low power.

Similarly, the hydrogen system controller can adjust the opening of the flow regulating valve according to the outlet hydrogen flow fed back by the second flow meter in the second hydrogen supply branch, so as to regulate the outlet flow of the second hydrogen supply branch, and achieve the accurate control of the hydrogen flow.

Fig. 6 is a schematic flow chart of yet another hydrogen supplying method according to an embodiment of the present application, and optionally, the method further includes:

s601, receiving the outlet hydrogen flow of the second hydrogen supply branch fed back by the second flow meter.

In some embodiments, the second flow meter may monitor the hydrogen flow rate after flowing the regulating valve in real time, and send the monitored hydrogen flow rate to the hydrogen system controller, where the hydrogen system controller receives the outlet hydrogen flow rate of the second hydrogen supply branch fed back by the second flow meter.

S602, if the outlet hydrogen flow of the second hydrogen supply branch does not reach the second flow under the high-power operation scene, controlling the opening of a flow regulating valve in the second hydrogen supply branch to regulate the outlet hydrogen flow in the second hydrogen supply branch.

Under the high-power operation scene, because the hydrogen supply flow of the second hydrogen supply branch is the second flow, when the hydrogen system controller judges that the outlet hydrogen flow of the second hydrogen supply branch does not reach the second flow, the opening of the flow regulating valve in the second hydrogen supply branch can be controlled to regulate the hydrogen supply flow of the second hydrogen supply branch until the outlet hydrogen flow of the second hydrogen supply branch reaches the second flow, the requirement is met, and the regulation can be stopped.

And S603, if the outlet hydrogen flow of the second hydrogen supply branch does not reach the required hydrogen flow under the low-power operation scene, controlling the opening of a flow regulating valve in the second hydrogen supply branch, and regulating the outlet hydrogen flow in the second hydrogen supply branch.

Under the low-power operation scene, as the hydrogen is supplied by the second hydrogen supply branch, the hydrogen supply flow of the second hydrogen supply branch is the required hydrogen flow under the low-power scene, when the detected outlet hydrogen flow of the second hydrogen supply branch does not reach the required hydrogen flow, the outlet hydrogen flow of the second hydrogen supply branch is regulated by controlling the opening of the flow regulating valve in the second hydrogen supply branch until the outlet hydrogen flow of the second hydrogen supply branch reaches the required hydrogen flow, and the regulation is stopped.

Fig. 7 is a schematic flow chart of another hydrogen supply method according to an embodiment of the present application, and optionally, the method further includes:

s701, receiving secondary adjustment instruction information sent by a power domain controller, wherein the secondary adjustment instruction information comprises: the difference between the required power and the actual output power of the load.

In some embodiments, the actual output power of the load may also be monitored by the power domain controller, and secondary adjustments may be made based on the difference between the actual output power and the demanded power.

The actual output power of the load is related to the amount of electricity generated by the fuel cell, and the amount of electricity generated by the fuel cell is related to the flow of hydrogen entering the fuel cell, and when the actual output power of the load does not reach the required power, possibly because the flow of hydrogen supplied to the fuel cell does not reach the requirement, the required flow of hydrogen can be provided for the fuel cell through secondary regulation, so as to reduce the difference between the required power and the actual output power of the load.

Optionally, the secondary regulation indication information sent by the power domain controller to the hydrogen system controller may include: the difference between the required power and the actual output power of the load.

S702, determining hydrogen with target flow corresponding to secondary regulation according to the secondary regulation indication information.

And the hydrogen system controller calculates a power difference value according to the required power and the actual output power, and determines the hydrogen with the corresponding target flow according to the power difference value.

In some cases, the power domain controller may also directly calculate a power difference value according to the collected required power and the actual output power of the load, and determine the corresponding target flow hydrogen according to the power difference value, and then the secondary adjustment instruction information sent by the power domain controller to the hydrogen system controller may include: target flow of hydrogen.

S703, controlling the opening degree of the flow regulating valve in the second hydrogen supply branch according to the target flow of hydrogen, and outputting the target flow of hydrogen to the fuel cell.

The hydrogen system controller may then adjust the outlet hydrogen flow of the second hydrogen supply branch to the target flow by controlling the opening of the flow regulating valve in the second hydrogen supply branch.

In the secondary regulation process, the first hydrogen supply branch is not used, and the hydrogen supply quantity of the first hydrogen supply branch is constant and cannot be regulated, so that the required target flow is difficult to accurately reach.

Therefore, the flow regulation and control of the whole hydrogen supply system in the operation process are realized, and the hydrogen flow in the whole system in the operation process is monitored in real time.

The power-oriented hydrogen flow can be accurately controlled and supplied through a double regulation mechanism of the power domain controller and the hydrogen system controller, and the response rate of the fuel cell is improved.

In summary, the hydrogen supply method provided in this embodiment is applied to a hydrogen supply system, where a second hydrogen supply branch is added to the hydrogen supply system based on a first hydrogen supply branch, and the outlet hydrogen flow of the second hydrogen supply branch is adjustable, so that under different operating scenarios of loads, hydrogen supply can be completed by controlling the first hydrogen supply branch and/or the second hydrogen supply branch in cooperation, and accurate control of hydrogen supply can be achieved by setting the second hydrogen supply branch with adjustable hydrogen flow. Compared with the traditional constant hydrogen supply, the method can meet the hydrogen supply requirements under different operation scenes of the load, and ensures the stable operation of the load.

In addition, through the dual regulation mechanism of the power domain controller and the hydrogen system controller, the accurate control and supply of the hydrogen flow guided by power can be realized, and the response rate of the fuel cell is improved.

The following describes a device, equipment, a storage medium, etc. for executing the hydrogen supplying method provided in the present application, and specific implementation processes and technical effects of the device, the equipment, the storage medium, etc. refer to the above, and are not described in detail below.

Fig. 8 is a schematic diagram of a hydrogen supply device according to an embodiment of the present application, where a function implemented by the hydrogen supply device corresponds to a step executed by the above method. The apparatus may be understood as an electronic device or server in which the hydrogen supply system is deployed. As shown in fig. 8, the apparatus may include: the acquisition module 810, the control module 820;

the collection module 810 is configured to collect a required power of the load, determine an operation scenario of the load and a hydrogen flow required by the fuel cell according to the required power;

the control module 820 is used for controlling the hydrogen supply branch corresponding to the operation scene to output the hydrogen with the required flow to the fuel cell according to the operation scene; the hydrogen supply branch comprises a first hydrogen supply branch and/or a second hydrogen supply branch.

Optionally, the control module 820 is specifically configured to output the first flow of hydrogen to the fuel cell by controlling the opening of the first pressure reducing valve in the first hydrogen supply branch if the operation scenario of the load is a high-power operation scenario;

Determining a second flow rate according to the hydrogen flow rate and the first flow rate required by the operation of the fuel cell;

and controlling the opening of the second pressure reducing valve and the opening of the flow regulating valve in the second hydrogen supply branch according to the second flow, and outputting the hydrogen with the second flow to the fuel cell.

Optionally, the control module 820 is specifically configured to control the opening degrees of the second pressure reducing valve and the flow regulating valve in the second hydrogen supply branch according to the hydrogen flow required by the operation of the fuel cell if the operation scenario of the load is a low-power operation scenario, and output the required hydrogen flow to the fuel cell.

Optionally, the method further comprises: a receiving module;

the receiving module is used for receiving the outlet hydrogen flow of the second hydrogen supply branch fed back by the second flowmeter;

the control module 820 is specifically configured to control an opening of the flow regulating valve in the second hydrogen supply branch if the outlet hydrogen flow of the second hydrogen supply branch does not reach the second flow in the high-power operation scenario, and regulate the outlet hydrogen flow in the second hydrogen supply branch;

the control module 820 is specifically configured to control the opening of the flow regulating valve in the second hydrogen supply branch, and regulate the outlet hydrogen flow in the second hydrogen supply branch if the outlet hydrogen flow of the second hydrogen supply branch does not reach the required hydrogen flow in the low-power operation scenario.

Optionally, the method further comprises: a determining module;

the receiving module is further configured to receive secondary adjustment indication information sent by the power domain controller, where the secondary adjustment indication information includes: the difference between the required power and the actual output power of the load;

the determining module is used for determining hydrogen of target flow corresponding to secondary regulation according to the secondary regulation indication information;

the control module 820 is specifically configured to control the opening of the flow regulating valve in the second hydrogen supply branch according to the target flow of hydrogen, and output the target flow of hydrogen to the fuel cell.

The foregoing apparatus is used for executing the method provided in the foregoing embodiment, and its implementation principle and technical effects are similar, and are not described herein again.

The above modules may be one or more integrated circuits configured to implement the above methods, for example: one or more application specific integrated circuits (Application Specific Integrated Circuit, abbreviated as ASIC), or one or more microprocessors (digital singnal processor, abbreviated as DSP), or one or more field programmable gate arrays (Field Programmable Gate Array, abbreviated as FPGA), or the like. For another example, when a module above is implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a central processing unit (Central Processing Unit, CPU) or other processor that may invoke the program code. For another example, the modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

The modules may be connected or communicate with each other via wired or wireless connections. The wired connection may include a metal cable, optical cable, hybrid cable, or the like, or any combination thereof. The wireless connection may include a connection through a LAN, WAN, bluetooth, zigBee, or NFC, or any combination thereof. Two or more modules may be combined into a single module, and any one module may be divided into two or more units. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system and apparatus may refer to corresponding procedures in the method embodiments, which are not described in detail in this application.

Fig. 9 is a schematic structural diagram of an electronic device provided in an embodiment of the present application, where the terminal may be a computing device with a data processing function.

The apparatus includes: a processor 801, and a storage medium 802.

The storage medium 802 is used to store a program, and the processor 801 calls the program stored in the storage medium 802 to execute the above-described method embodiment. The specific implementation manner and the technical effect are similar, and are not repeated here.

Therein, the storage medium 802 stores program code that, when executed by the processor 801, causes the processor 801 to perform various steps in the hydrogen supply method according to various exemplary embodiments of the present application described in the above section of the present specification.

The processor 801 may be a general purpose processor such as a Central Processing Unit (CPU), digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, and may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution.

The storage medium 802 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. The storage medium may include at least one type of storage medium, and may include, for example, flash Memory, a hard disk, a multimedia card, a card-type storage medium, a random access storage medium (Random Access Memory, RAM), a static random access storage medium (Static Random Access Memory, SRAM), a programmable Read-Only storage medium (Programmable Read Only Memory, PROM), a Read-Only storage medium (ROM), a charged erasable programmable Read-Only storage medium (Electrically Erasable Programmable Read-Only storage), a magnetic storage medium, a magnetic disk, an optical disk, and the like. A storage medium is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The storage medium 802 in the embodiments of the present application may also be a circuit or any other device capable of implementing a storage function, for storing program instructions and/or data.

Optionally, the present application also provides a program product, such as a computer readable storage medium, comprising a program for performing the above-described method embodiments when being executed by a processor.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units.

The integrated units implemented in the form of software functional units described above may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (english: processor) to perform part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: u disk, mobile hard disk, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.

Claims (8)

1. A hydrogen supply system, comprising: the hydrogen supply unit, the hydrogen flow dividing valve, the hydrogen flow regulating unit and the hydrogen system controller; the hydrogen flow regulating unit is respectively connected with the hydrogen supply unit and the fuel cell; the hydrogen system controller is connected with the hydrogen flow regulating unit;

The hydrogen supply unit is used for conveying hydrogen to the hydrogen flow regulating unit;

the hydrogen flow regulating unit is used for regulating the flow of the hydrogen conveyed by the hydrogen supply unit and outputting the hydrogen to the fuel cell;

the hydrogen flow regulating unit comprises a first hydrogen supply branch and a second hydrogen supply branch; the first hydrogen supply branch comprises a first pressure reducing valve and a first flowmeter; the second hydrogen supply branch comprises a second pressure reducing valve, a flow regulating valve and a second flowmeter;

the hydrogen flow dividing valve is used for balancing the pressure of the hydrogen flowing out of the hydrogen supply unit and distributing the hydrogen flow of the first hydrogen supply branch and the second hydrogen supply branch;

the hydrogen system controller is used for collecting the required power of the load and determining the operation scene of the load and the hydrogen flow required by the fuel cell according to the required power; according to the operation scene, controlling a hydrogen supply branch corresponding to the operation scene to output hydrogen with required flow to the fuel cell; the hydrogen supply branch comprises the first hydrogen supply branch and/or the second hydrogen supply branch; if the first hydrogen supply branch and the second hydrogen supply branch are in an open state, the first hydrogen supply branch and the second hydrogen supply branch are matched together to supply hydrogen to the fuel cell;

The system further comprises: a power domain controller; the power domain controller is connected with the hydrogen system controller;

the power domain controller is used for sending a secondary regulation instruction to the hydrogen system controller according to the output power and the required power of the load so as to instruct the hydrogen system controller to regulate and control hydrogen supply by controlling the second hydrogen supply branch.

2. The system of claim 1, wherein the system further comprises: the gas-water separation device is respectively connected with the fuel cell and the hydrogen ejector; the hydrogen ejector is also connected to the second hydrogen supply branch;

the gas-water separation device is used for collecting unreacted hydrogen of the fuel cell, and after gas-water separation, the separated hydrogen is led into the second hydrogen supply branch through the hydrogen ejector.

3. The system of claim 1, wherein the hydrogen supply unit comprises: a gas cylinder group, an integrated bottleneck valve and a filter; the gas cylinder group, the integrated bottleneck valve and the filter are connected in sequence;

the gas cylinder group comprises a plurality of gas cylinders, and each gas cylinder adopts a plastic liner carbon fiber fully-wound cylinder;

Hydrogen in each gas cylinder in the gas cylinder group flows through the filter through the integrated bottleneck valve;

the filter is used for filtering the hydrogen flowing through.

4. A hydrogen supply method, characterized by being applied to the hydrogen system controller in the hydrogen supply system according to any one of claims 1 to 3, comprising:

the method comprises the steps of collecting the required power of a load, and determining the operation scene of the load and the hydrogen flow required by a fuel cell according to the required power;

according to the operation scene, controlling a hydrogen supply branch corresponding to the operation scene to output hydrogen with required flow to a fuel cell; the hydrogen supply branch comprises a first hydrogen supply branch and/or a second hydrogen supply branch;

according to the operation scene, controlling a hydrogen supply branch corresponding to the operation scene to output hydrogen with required flow to the fuel cell, including:

if the operation scene of the load is a high-power operation scene, outputting hydrogen with a first flow to the fuel cell by controlling the opening degree of a first pressure reducing valve in the first hydrogen supply branch;

determining a second flow rate according to the hydrogen flow rate required by the operation of the fuel cell and the first flow rate;

And controlling the opening degree of a second pressure reducing valve and a flow regulating valve in the second hydrogen supply branch according to the second flow, and outputting the hydrogen with the second flow to the fuel cell.

5. The method according to claim 4, wherein controlling the hydrogen supply branch corresponding to the operation scenario to output the hydrogen gas of the required flow rate to the fuel cell according to the operation scenario comprises:

and if the operation scene of the load is a low-power operation scene, controlling the opening of a second pressure reducing valve and a flow regulating valve in the second hydrogen supply branch according to the hydrogen flow required by the operation of the fuel cell, and outputting the required hydrogen flow to the fuel cell.

6. The method according to claim 4 or 5, further comprising:

receiving the outlet hydrogen flow of the second hydrogen supply branch fed back by a second flowmeter;

if the outlet hydrogen flow of the second hydrogen supply branch does not reach the second flow in the high-power operation scene, controlling the opening of a flow regulating valve in the second hydrogen supply branch, and regulating the outlet hydrogen flow in the second hydrogen supply branch;

and if the outlet hydrogen flow of the second hydrogen supply branch does not reach the required hydrogen flow under the low-power operation scene, controlling the opening of a flow regulating valve in the second hydrogen supply branch to regulate the outlet hydrogen flow in the second hydrogen supply branch.

7. The method as recited in claim 4, further comprising:

receiving secondary regulation indicating information sent by a power domain controller, wherein the secondary regulation indicating information comprises: the difference between the required power and the actual output power of the load;

determining hydrogen of target flow corresponding to secondary regulation according to the secondary regulation indication information;

and controlling the opening degree of a flow regulating valve in the second hydrogen supply branch according to the target flow of hydrogen, and outputting the target flow of hydrogen to the fuel cell.

8. A computer-readable storage medium, characterized in that the storage medium has stored thereon a computer program which, when executed by a processor, implements the hydrogen supply method according to any one of claims 4 to 7.