CN113581016B - Idle speed control method of fuel cell system and related equipment - Google Patents

Idle speed control method of fuel cell system and related equipment Download PDF

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Publication number
CN113581016B
CN113581016B CN202110677694.2A CN202110677694A CN113581016B CN 113581016 B CN113581016 B CN 113581016B CN 202110677694 A CN202110677694 A CN 202110677694A CN 113581016 B CN113581016 B CN 113581016B
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China
Prior art keywords
fuel cell
cell system
power
heater
increased
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CN202110677694.2A
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Chinese (zh)
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CN113581016A (en
Inventor
马义
陈明
张剑
熊成勇
李学锐
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Dongfeng Motor Group Co Ltd
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Dongfeng Motor Group Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
    • B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
    • B60L58/33—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
    • B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
    • B60L58/34—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by heating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Fuel Cell (AREA)

Abstract

The embodiment of the specification discloses an idle speed control method of a fuel cell system, comprising the following steps: judging whether the fuel cell system is in an idle running condition or not; when the fuel cell system is in an idle running condition, controlling the running power of the energy consumption equipment to be increased so as to reduce the net output power of the fuel cell system; wherein the energy consumption device comprises at least one of a heater, an air compressor, a radiator fan, a water pump and a hydrogen pump. According to the embodiment of the specification, different energy consumption devices can be controlled to operate according to the requirements of the fuel cell system, namely, the minimum output power of the electric pile of the fuel cell system under the idle operation working condition is consumed through the different energy consumption devices, so that the net output power of the fuel cell system is reduced, the stability of the net output power of the fuel cell system under the idle operation working condition is improved, the service life of the electric pile is prolonged, and meanwhile, the flexibility of the idle control method of the fuel cell system is improved.

Description

Idle speed control method of fuel cell system and related equipment
Technical Field
The embodiment of the specification relates to the technical field of fuel cell systems, in particular to an idle speed control method and related equipment of a fuel cell system.
Background
After the fuel cell system is started, if the vehicle does not give a running instruction, or the vehicle is temporarily stopped due to red lights, traffic jams and the like, the fuel cell system can enter an idle running condition without outputting power to the vehicle.
The fuel cell system has a minimum output power of the stack under idle operation. The prior art generally controls heater operation to consume a minimum output power of the fuel cell system stack during idle operation.
At present, when a heater is not arranged in the fuel cell system, or when the heater in the fuel cell system cannot operate due to failure, the minimum output power of the electric pile cannot be consumed, so that the output power of the fuel cell system to a vehicle cannot be reduced, the service life of the electric pile is influenced, and the operation reliability of the fuel cell system is reduced.
Disclosure of Invention
The embodiments of the present specification aim to solve the technical problem that the minimum output power of the fuel cell system cannot be consumed at the time of a heater failure.
Embodiments of the present disclosure provide an idle speed control method of a fuel cell system and related apparatus.
In a first aspect, embodiments of the present specification provide an idle speed control method of a fuel cell system, including: judging whether the fuel cell system is in an idle running condition or not; when the fuel cell system is in an idle running condition, controlling the running power of the energy consumption equipment to be increased so as to reduce the net output power of the fuel cell system; wherein the energy consumption device comprises at least one of a heater, an air compressor, a radiator fan, a water pump and a hydrogen pump.
Optionally, when the fuel cell system is in the idle operation condition, controlling the operation power of the energy consumption device to increase includes: when the fuel cell system is in an idle running condition, judging whether the heater is in a running state or not; when the heater is in an operating state, controlling the operating power of the heater to be increased; when the heater is in the non-operating state, at least one of the operating power of the air compressor, the operating power of the radiator fan, the operating power of the water pump, and the operating power of the hydrogen pump is controlled to be increased.
Optionally, when the fuel cell system is in the idle operation condition, controlling the operation power of the energy consumption device to increase further includes: when the heater is in an operating state, acquiring the temperature of the electric pile; judging whether the temperature of the electric pile is greater than or equal to a preset temperature; when the temperature of the electric pile is greater than or equal to a preset temperature, at least one of the operation power of the air compressor, the operation power of the cooling fan, the operation power of the water pump and the operation power of the hydrogen pump is controlled to be increased.
Optionally, controlling at least one of the operating power of the air compressor, the operating power of the radiator fan, the operating power of the water pump, and the operating power of the hydrogen pump to be increased includes: controlling at least one of the operation power of the cooling fan, the operation power of the water pump and the operation power of the hydrogen pump to be increased; acquiring the net output power of the fuel cell system; judging whether the net output power of the fuel cell system is greater than a set threshold; when the net output power of the fuel cell system is greater than the set threshold, the operating power of the air compressor is increased.
Optionally, controlling at least one of the operating power of the air compressor, the operating power of the radiator fan, the operating power of the water pump, and the operating power of the hydrogen pump to be increased includes: the rotation speed of the air compressor is controlled to be increased, and/or the rotation speed of the cooling fan is controlled to be increased, and/or the rotation speed of the water pump is controlled to be increased, and/or the rotation speed of the hydrogen pump is controlled to be increased.
Optionally, the fuel cell system includes a radiator for controlling the power consumption device to increase in operation power when the fuel cell system is in the idle operation condition, and further includes: when the temperature of the electric pile is greater than or equal to the preset temperature, controlling the heat radiator to exchange heat with the heater; wherein the preset temperature is between 0 ℃ and 40 ℃.
Optionally, the fuel cell system includes a pressure release valve and a back pressure valve, and further includes, after the rotational speed of the air compressor is controlled to increase: and adjusting the opening degree of the pressure relief valve and/or the back pressure valve.
In a second aspect, embodiments of the present specification provide an idle speed control apparatus of a fuel cell system, including: the judging unit is used for judging whether the fuel cell system is in an idle running condition or not; the control unit is used for controlling the operation power of the energy consumption equipment to be increased when the fuel cell system is in an idle operation condition so as to reduce the net output power of the fuel cell system; wherein the energy consumption device comprises at least one of a heater, an air compressor, a radiator fan, a water pump and a hydrogen pump.
In a third aspect, embodiments of the present specification provide an electronic device including a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions implementing the steps of the idle speed control method of the fuel cell system of the first aspect when executed by the processor.
In a fourth aspect, the present embodiment provides a readable storage medium storing a program which, when executed, enables the implementation of the steps of the idle speed control method of the fuel cell system of the first aspect described above.
The embodiment of the specification has the following beneficial effects:
according to the embodiment of the specification, when the fuel cell system is in the idle running working condition, the running power of the energy consumption equipment is controlled to be increased, namely, the running power of at least one of the heater, the air compressor, the radiator fan, the water pump and the hydrogen pump is controlled to be increased, so that different energy consumption equipment is controlled to run according to the requirement of the fuel cell system, namely, the minimum output power of the electric pile of the fuel cell system under the idle running working condition is consumed through different energy consumption equipment, so that the net output power of the fuel cell system under the idle running working condition is reduced, the stability of the net output power of the fuel cell system under the idle running working condition is improved, the service life of the electric pile is prolonged, and the flexibility of the idle speed control method of the fuel cell system is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the specification. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is one of the flow charts of the steps of the idle speed control method of a fuel cell system according to one embodiment provided herein;
FIG. 2 is a second flowchart of steps in an idle speed control method of a fuel cell system according to one embodiment of the present disclosure;
FIG. 3 is a third flowchart of steps in an idle speed control method of a fuel cell system according to one embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a heater maximum operating power variation curve according to one embodiment provided herein;
FIG. 5 is a fourth flowchart of steps in an idle speed control method of a fuel cell system according to one embodiment provided herein;
fig. 6 is a schematic structural diagram of an idle speed control device of a fuel cell system according to an embodiment provided in the present application;
FIG. 7 is a schematic block diagram of an electronic device according to an embodiment of the disclosure;
fig. 8 is one of schematic structural diagrams of a fuel cell system according to an embodiment provided herein;
FIG. 9 is a fifth flowchart of steps in an idle speed control method of a fuel cell system according to one embodiment of the present application;
FIG. 10 is a schematic diagram of air compressor operating power variation for one embodiment provided herein;
FIG. 11 is a second schematic diagram of a fuel cell system according to an embodiment of the present disclosure;
fig. 12 is a flowchart showing steps of an idle speed control method of a fuel cell system according to an embodiment of the present application.
Wherein, the correspondence between the reference numerals and the component names in fig. 6 to 8 and 11 is:
100: fuel cell system, 102: back pressure valve, 104: relief valve, 106: proportional valve, 108: hydrogen discharge valve, 110: pile, 112: temperature and pressure sensor, 114: control valve, 120: air compressor, 140: gas-liquid separator, 150: hydrogen pump, 160: water pump, 170: controller, 180: radiator, 210: judgment unit, 220: control unit, 310: memory, 320: a processor.
Detailed Description
In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present specification are described in detail below through the accompanying drawings and the specific embodiments, and it should be understood that the specific features of the embodiments of the present specification and the specific features of the embodiments of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and not limit the technical solutions of the present specification, and the technical features of the embodiments of the present specification may be combined without conflict.
In a first aspect, an embodiment of the present application provides an idle speed control method of a fuel cell system, which may be implemented as shown in fig. 1, and the method includes the following steps:
step S101, judging whether the fuel cell system is in an idle running condition;
step S102, when the fuel cell system is in the idle operation condition, controlling the operation power of the energy consuming device to increase so as to reduce the net output power of the fuel cell system.
Wherein the energy consumption device comprises at least one of a heater, an air compressor, a radiator fan, a water pump and a hydrogen pump.
It can be appreciated that after the fuel cell system is started, when the vehicle does not give a running instruction to the fuel cell system, or when the vehicle is temporarily stopped due to a red light, traffic jam and other reasons, the fuel cell system does not need to output power to the vehicle, and enters an idle running condition.
In some examples, whether the fuel cell system enters the idle operation condition may be determined according to an operation state of the vehicle, or whether the fuel cell system enters the idle operation condition may be determined according to an operation state of the fuel cell system, so that flexibility of an idle control method of the fuel cell system is improved.
It will be appreciated that the net output power of the fuel cell system is the difference between the output power of the stack and the operating power of the energy consuming device.
When the fuel cell system enters an idle operating condition, there is a minimum output power from the stack. Under the idle running condition, the fuel cell system does not need to output power to the vehicle, so that the running power of the energy-consuming equipment needs to be increased to consume the minimum output power of the electric pile, and the net output power of the fuel cell system can be reduced, namely the output power of the fuel cell system to the vehicle is reduced.
In some examples, by increasing the operating power of the energy consuming device, the net output power of the fuel cell system may be reduced to zero, i.e., the output power of the fuel cell system to the vehicle under idle operating conditions may be reduced to zero, further improving the reliability of the fuel cell system under idle operating conditions.
The energy consumption equipment comprises at least one of a heater, an air compressor, a radiator fan, a water pump and a hydrogen pump, so that different energy consumption equipment can be controlled to operate according to different requirements of the fuel cell system, the minimum output power of the electric pile can be consumed, the net output power of the fuel cell system under an idle operation working condition is reduced, the stability of the net output power of the fuel cell system under the idle operation working condition is improved, the service life of the electric pile is prolonged, and the flexibility of an idle control method of the fuel cell system is improved.
In some examples, as shown in fig. 2, controlling the operating power of the energy consuming device to increase when the fuel cell system is in an idle operating condition includes:
step S201, judging whether the heater is in an operating state or not when the fuel cell system is in an idle operating condition;
step S202, when the heater is in an operation state, controlling the operation power of the heater to be increased;
in step S203, when the heater is in the non-operation state, at least one of the operation power of the air compressor, the operation power of the heat radiation fan, the operation power of the water pump, and the operation power of the hydrogen pump is controlled to be increased. When the fuel cell system is in an idle operation condition, it is first determined whether the heater is in an operating state. When the heater is in an operating state, the operating power of the heater is controlled to be increased. It can be appreciated that since the maximum operation power of the heater is large, the net output power of the fuel cell system can be reduced and the operation reliability of the fuel cell system can be improved by increasing the operation power of the heater to consume the minimum output power of the stack.
When the heater is in the non-operating state, at least one of the operating power of the air compressor, the operating power of the radiator fan, the operating power of the water pump, and the operating power of the hydrogen pump is controlled to be increased. Specifically, the air compressor is used for compressing air, the cooling fan is used for cooling the fuel cell system, the water pump is used for driving the refrigerant circulation in the fuel cell system, and the hydrogen pump is used for driving the hydrogen circulation in the fuel cell system.
It will be appreciated that the heater may be in a non-operating state due to a fault or the like, or the fuel cell system may not include a heater.
When the heater is in the non-operating state, the fuel cell system cannot consume the minimum output power of the stack through the heater. Therefore, the operation power of at least one of the air compressor, the cooling fan, the water pump and the hydrogen pump is controlled to be increased, the minimum output power of the electric pile of the fuel cell system under the idle operation working condition is consumed, and the operation reliability of the fuel cell system is improved.
It is understood that when the heater is in the non-operating state, the operating power of the water pump, the hydrogen pump, or the radiator fan may be controlled to be increased, and then it is determined whether the minimum output power of the stack is completely consumed. The operation power of the air compressor is maintained unchanged if the minimum output power of the electric pile can be completely consumed, and the operation power of the air compressor is controlled to be increased if the minimum output power of the electric pile cannot be completely consumed.
By controlling the operation power of at least one of the air compressor, the radiator fan, the water pump and the hydrogen pump to be increased under the condition that the minimum output power of the electric pile is consumed, the operation state of the energy consumption equipment is controlled according to the net output power of the fuel cell system, the energy consumption of the fuel cell system is reduced, and the operation reliability of the fuel cell system is further improved. By increasing the operating power of the heater when the heater is in the operating state and increasing the operating power of at least one of the air compressor, the radiator fan, the water pump and the hydrogen pump when the heater is in the non-operating state, the fuel cell system can control the operating power of different energy consumption devices to increase according to the operating state of the heater so as to consume the minimum output power of the electric pile, further ensure that the minimum output power of the electric pile can be consumed, improve the operating reliability and the use flexibility of the fuel cell system, and simultaneously reduce the energy consumption of the fuel cell system and improve the service performance of the fuel cell system.
In some examples, as shown in fig. 3, when the fuel cell system is in an idle operating condition, controlling the operating power of the energy consuming device to increase further comprises:
step S301, when the heater is in an operation state, acquiring the temperature of the electric pile;
step S302, judging whether the temperature of the electric pile is greater than or equal to a preset temperature;
in step S303, when the temperature of the stack is greater than or equal to the preset temperature, at least one of the operation power of the air compressor, the operation power of the cooling fan, the operation power of the water pump, and the operation power of the hydrogen pump is controlled to be increased. It will be appreciated that the heater exchanges heat with the stack via the coolant. The higher the temperature of the stack, the higher the temperature of the refrigerant flowing out of the stack, and thus the higher the temperature of the refrigerant flowing into the heater, as shown in fig. 4, the lower the maximum operating power of the heater.
When the heater is in an operating state, the temperature of the electric pile is acquired, and whether the temperature of the electric pile is greater than or equal to a preset temperature is judged. When the temperature of the electric pile is greater than or equal to the preset temperature, the maximum operation power of the heater is lower, and the minimum output power of the electric pile cannot be completely eliminated, so that when the temperature of the electric pile is greater than the preset temperature, the operation power of at least one of the air compressor, the cooling fan, the water pump and the hydrogen pump needs to be controlled to be increased, the minimum output power of the electric pile is further consumed, the net output power of the fuel cell system is reduced, the stability of the net output power of the fuel cell system under the idle operation working condition is improved, the service life of the electric pile is prolonged, and the operation reliability of the fuel cell system is improved.
It is understood that when the temperature of the electric pile is greater than or equal to the preset temperature, the operation power of the water pump, the hydrogen pump, the cooling fan, or the like may be controlled to be increased, and then it is determined whether the minimum output power of the electric pile is completely consumed. The operation power of the air compressor is maintained unchanged if the minimum output power of the electric pile can be completely consumed, and the operation power of the air compressor is controlled to be increased if the minimum output power of the electric pile cannot be completely consumed.
By controlling the operation power of at least one of the air compressor, the radiator fan, the water pump and the hydrogen pump to be increased under the condition that the minimum output power of the electric pile is consumed, the operation state of the energy consumption equipment is controlled according to the net output power of the fuel cell system, the energy consumption of the fuel cell system is reduced, and the operation reliability of the fuel cell system is further improved.
When the temperature of the electric pile is larger than or equal to the preset temperature, the operation power of at least one of the air compressor, the cooling fan, the water pump and the hydrogen pump is controlled to be increased, so that the situation that the maximum operation power of the heater is reduced due to the fact that the temperature of the electric pile is increased is avoided, the minimum output power of the electric pile cannot be completely consumed by the heater is avoided, the stability of the net output power of the fuel cell system under the idle operation working condition is further improved, the operation reliability of the fuel cell system is improved, the energy consumption of the fuel cell system can be reduced, and the service performance of the fuel cell system is improved. It is understood that when the temperature of the stack is less than the preset temperature, the operation power of the heater can be controlled to be increased, while the operation power of the air compressor, the radiator fan, the water pump and the hydrogen pump is controlled to be unchanged, so that the energy consumption of the fuel cell system is further reduced.
In some examples, as shown in fig. 5, controlling at least one of the operating power of the air compressor, the operating power of the radiator fan, the operating power of the water pump, and the operating power of the hydrogen pump to be increased includes:
step S401, controlling at least one of the operation power of the cooling fan, the operation power of the water pump and the operation power of the hydrogen pump to be increased;
step S402, obtaining the net output power of the fuel cell system;
step S403, determining whether the net output power of the fuel cell system is greater than a set threshold;
in step S404, when the net output power of the fuel cell system is greater than the set threshold, the operation power of the air compressor is increased.
After at least one of the operating power of the radiator fan, the operating power of the water pump, and the operating power of the hydrogen pump is controlled to be increased, the net output power of the fuel cell system is obtained. It is determined whether the net output power of the fuel cell system at this time is greater than a set threshold, and it is understood that the set threshold may be 0 kw.
If the net output power of the fuel cell system is greater than the set threshold, the operation power of the cooling fan, the water pump and the hydrogen pump is increased, so that the operation power of the air compressor needs to be controlled to be increased, and the minimum output power of the electric pile is further consumed, and the net output power of the fuel cell system can be continuously reduced.
It will be appreciated that, of course, when the net output power of the fuel cell system is less than or equal to the set threshold, it is explained that the minimum output power of the electric stack can be consumed by increasing the operation powers of the radiator fan, the water pump and the hydrogen pump, so that the operation power increase of the air compressor does not need to be controlled, and the energy consumption of the fuel cell system is reduced.
After the operation power of at least one of the cooling fan, the water pump and the hydrogen pump is controlled to be increased, the relation between the net output power of the fuel cell system and the set threshold value is judged, so that the operation state of the air compressor is controlled, the operation state of energy-consuming equipment is controlled according to the net output power of the fuel cell system, the power consumption of the fuel cell system is further reduced, and the operation reliability of the fuel cell system is improved.
In some examples, controlling at least one of the operating power of the air compressor, the operating power of the radiator fan, the operating power of the water pump, and the operating power of the hydrogen pump to increase includes: the rotation speed of the air compressor is controlled to be increased, and/or the rotation speed of the cooling fan is controlled to be increased, and/or the rotation speed of the water pump is controlled to be increased, and/or the rotation speed of the hydrogen pump is controlled to be increased.
The operation power of the air compressor, the cooling fan, the water pump and the hydrogen pump is increased by increasing the rotation speeds of the air compressor, the cooling fan, the water pump and the hydrogen pump, so that the control is easy, the response speed of the fuel cell system is improved, and the different operation power of energy consumption equipment can be increased by adjusting the different rotation speeds of the air compressor, the cooling fan, the water pump and the hydrogen pump, so that the different operation requirements of the fuel cell system are met, and the flexibility of the idle speed control method of the fuel cell system is improved.
In some examples, the fuel cell system includes a radiator that controls an increase in operating power of the energy consuming device when the fuel cell system is in an idle operating condition, further comprising:
when the temperature of the electric pile is greater than or equal to the preset temperature, controlling the heat radiator to exchange heat with the heater;
wherein the preset temperature is between 0 ℃ and 40 ℃.
It can be appreciated that when the temperature of the stack is greater than or equal to the preset temperature, the heat exchange between the radiator and the heater is controlled, so that the temperature of the heater is reduced, that is, the temperature of the stack is reduced, the maximum operating power of the heater is increased, the consumption effect of the heater on the minimum output power of the stack is enhanced, and the net output power of the fuel cell system is reduced.
When the temperature of the electric pile is greater than or equal to the preset temperature, the radiator and the heater are controlled to exchange heat, so that the temperature of the heater is reduced, the maximum operating power of the heater is improved, the minimum output power of the electric pile of the fuel cell system can be consumed under the idle operating condition, and the operating reliability of the fuel cell system is improved.
It will be appreciated that different preset temperatures may be set depending on the different operating requirements of the fuel cell system. In some examples, the preset temperature may be 25 degrees celsius, 30 degrees celsius, or 35 degrees celsius.
Through setting up preset temperature between 0 ℃ and 40 ℃, make the radiator in time exchange heat with the heater, avoided the heater to damage because the temperature is too high, also avoided the biggest operating power of heater too low simultaneously, unable complete consumption electric pile's minimum output, further improved fuel cell system's operational reliability.
In some examples, the fuel cell system includes a pressure relief valve and a back pressure valve, and after controlling the rotational speed of the air compressor to increase, further includes: and adjusting the opening degree of the pressure relief valve and/or the back pressure valve.
The fuel cell system includes a pressure relief valve and a back pressure valve, which are understandably connected to the outlet of the air compressor for regulating the flow and pressure of the air compressor outlet.
It will be appreciated that after the rotational speed of the air compressor is controlled to increase, both the flow rate and the pressure at the air compressor outlet increase. Therefore, the opening degree of the pressure relief valve and/or the back pressure valve is adjusted, the pressure of the outlet of the air compressor can be reduced, so that air is discharged out of the fuel cell system, the influence on the normal operation performance of the fuel cell system due to overlarge flow and pressure of the outlet of the air compressor is avoided, and the operation reliability of the fuel cell system is further improved.
In some examples, the opening of the pressure relief valve and/or the back pressure valve may be adjusted according to the operating requirements of the fuel cell system, so that the air flow and pressure at the air compressor outlet can meet the use requirements of the electric pile, improving the applicability of the idle speed control method of the fuel cell system.
In a second aspect, as shown in fig. 6, based on the same inventive concept of the above method, an embodiment of the present disclosure provides an idle speed control device of a fuel cell system, which performs functions and effects similar to those of the idle speed control method of the fuel cell system of the first aspect, so that all the advantages of the first aspect are provided, and are not repeated herein.
Specifically, the idle speed control device of the fuel cell system includes a determination unit 210 and a control unit 220. The determining unit 210 is configured to determine whether the fuel cell system is in an idle operation condition. The control unit 220 is configured to control the power consumption device to increase the operating power to reduce the net output power of the fuel cell system when the fuel cell system is in an idle operating condition. Wherein the energy consumption device comprises at least one of a heater, an air compressor, a radiator fan, a water pump and a hydrogen pump.
In a third aspect, as shown in fig. 7, based on the same inventive concept as the idle speed control method of the fuel cell system described above, the present embodiment provides an electronic device, including a processor 320, a memory 310, and a program or an instruction stored in the memory 310 and capable of running on the processor 320, where the program or the instruction, when executed by the processor 320, implements the steps of the idle speed control method of the fuel cell system described above in the first aspect, and therefore has all the advantages of the first aspect described above, and will not be repeated herein.
In a fourth aspect, based on the same inventive concept as the idle speed control method of the fuel cell system described above, the embodiments of the present disclosure provide a readable storage medium storing a program, which when executed, can implement the steps of the idle speed control method of the fuel cell system described above in the first aspect, and thus have all the advantages of the first aspect described above, and are not repeated herein.
One embodiment of the present application provides an idle speed control method of a fuel cell system. As shown in fig. 8, the fuel cell system 100 is an oxyhydrogen fuel cell system, and hydrogen and oxygen react in a stack 110 to generate electric power. Specifically, the fuel cell system 100 includes an air system and a hydrogen system.
The air system includes an air intake branch for inputting air into the stack 110 and an air exhaust branch for exhausting air from the stack 110. The air compressor 120 is provided on the air intake branch, and external air flows into the stack 110 after being compressed by the air compressor 120. A back pressure valve 102 is provided on the air exhaust branch for controlling the flow rate of the air exhaust branch. The pressure release valve 104 is connected with the air inlet branch and the air outlet branch, so that air discharged by the air compressor 120 can directly flow to the air outlet branch through the pressure release valve 104, and finally is discharged out of the fuel cell system 100, and does not need to flow through the electric pile 110, thereby realizing flexible control of air flow input into the electric pile 110.
In some examples, the pressure relief valve 104 may be a one-way valve that is unidirectional in the direction of the air intake branch to the air exhaust branch, avoiding air from the air exhaust branch flowing back to the air intake branch via the pressure relief valve 104.
The hydrogen system comprises a hydrogen inlet branch and a hydrogen outlet branch. The hydrogen inlet branch is used for inputting hydrogen into the electric pile 110, and the hydrogen outlet branch is used for discharging hydrogen, nitrogen, impurities and the like in the electric pile 110. It is understood that the impurity is water produced by the reaction of hydrogen and oxygen.
A proportional valve 106 is provided on the hydrogen intake branch for controlling the intake flow rate of hydrogen. The hydrogen discharge valve 108 is provided on the hydrogen discharge branch for controlling the flow rate of the hydrogen discharge branch. The gas-liquid separator 140 is provided on the hydrogen off-gas branch for separating the gas discharged from the hydrogen off-gas branch from impurities. The hydrogen system also comprises a hydrogen circulation branch which is connected with the hydrogen inlet branch and the hydrogen exhaust branch. The hydrogen pump 150 is disposed on the hydrogen circulation branch, and the gas separated by the gas-liquid separator 140 is driven by the hydrogen pump 150 to reenter the stack 110, thereby realizing the recycling of hydrogen. As can be appreciated, when the hydrogen discharge valve 108 is opened, the impurities separated by the gas-liquid separator 140 are discharged out of the fuel cell system 100 via the hydrogen discharge valve 108.
The fuel cell system 100 further includes a water pump 160, a control valve 114, a heater 130, and a radiator 180. The water pump 160 is used for driving the refrigerant to circulate in the refrigerant pipeline. The control valve 114 serves to control a flow path of the refrigerant so that the radiator 180 can exchange heat with the stack 110 and/or the heater 130.
In some examples, the fuel cell system 100 further includes at least one temperature and pressure sensor 112, the at least one temperature and pressure sensor 112 for detecting the temperature and pressure of the air, hydrogen, or coolant.
In some examples, the fuel cell system 100 further includes a controller 170, where the controller 170 is electrically connected to the air compressor 120, the back pressure valve 102, the pressure relief valve 104, the stack 110, the proportional valve 106, the hydrogen discharge valve 108, the hydrogen pump 150, the temperature and pressure sensor 112, the water pump 160, the heater 130, the control valve 114, and the like, to implement automatic control of the fuel cell system 100.
As shown in fig. 9, the idle speed control method of the fuel cell system includes:
step S501, when the fuel cell system enters an idle running condition, detecting the temperature of the refrigerant flowing into the electric pile;
step S502, judging whether the temperature of the refrigerant flowing into the electric pile is less than a preset temperature;
if yes, step S503 is executed, and if no, step S504 is executed;
step S503, controlling the operation power of the heater to be increased;
step S504, controlling the running power of the heater to be increased, controlling the rotation speed of the water pump to be increased, controlling the rotation speed of the cooling fan to be increased, controlling the rotation speed of the hydrogen pump to be increased, and controlling the rotation speed of the air compressor to be increased;
step S505, adjusting the opening degree of the relief valve and/or the back pressure valve;
step S506, judging whether the minimum output power of the electric pile is completely consumed;
if not, the above step S501 is repeatedly performed.
Specifically, when the fuel cell system enters an idle operation condition, the temperature of the refrigerant flowing into the electric pile is obtained. As shown in fig. 4, the higher the temperature of the refrigerant flowing into the stack, the higher the temperature of the stack, and the lower the maximum operating power of the heater.
When the temperature of the refrigerant flowing into the electric pile is smaller than the preset temperature, the operation power of the heater is increased, the minimum output power of the electric pile can be consumed through the operation power of the heater, the net output power of the fuel cell system is reduced, and the stability of the output power of the fuel cell system under the idle operation working condition is improved.
When the temperature of the refrigerant flowing into the electric pile is greater than or equal to the preset temperature, the maximum operating power of the heater is reduced, so that the minimum output power of the electric pile cannot be completely consumed. At this time, not only the operation power of the heater is controlled to be increased, but also the rotation speed of the water pump is controlled to be increased, the rotation speed of the cooling fan is controlled to be increased, the rotation speed of the hydrogen pump is controlled to be increased, and the rotation speed of the air compressor is controlled to be increased, so that the operation power of the heater, the water pump, the cooling fan, the hydrogen pump and the air compressor is increased, the consumption effect on the minimum output power of the electric pile is improved, and the stability of the net output power of the fuel cell system under the idle operation working condition is further improved.
In some examples, when the temperature of the refrigerant flowing into the electric pile is greater than or equal to the preset temperature, the conduction state of the control valve is adjusted, so that the radiator can exchange heat with the heater and the electric pile, the temperature of the refrigerant flowing into the electric pile is reduced, the maximum operating power of the heater is increased, the minimum output power of the electric pile of the fuel cell system under the idle operating condition is further ensured to be consumed, and the operating reliability of the fuel cell system is improved.
In addition, the rotation speed of the water pump is controlled to be increased, so that the running power of the water pump can be increased, the flow rate of the refrigerant flowing into the radiator can be increased, the radiating effect of the radiator on the electric pile and the heater is further improved, the temperature of the refrigerant flowing into the electric pile is reduced, and the maximum running efficiency of the heater is improved.
It will be appreciated that as the rotational speed of the air compressor is increased, both the air flow and the pressure at the air compressor outlet are increased. As shown in fig. 10, point a is the correspondence between the flow rate at the outlet of the air compressor and the pressure value in the initial state of the air compressor. The rotational speed of the air compressor increases, and if the opening degree of the back pressure valve is larger at this time, the flow rate of the air compressor outlet is larger, the pressure is lower, and the operating point of the air compressor changes to the point B. If the opening degree of the back pressure valve is smaller at this time, the flow rate of the outlet of the air compressor is smaller, and the pressure is larger, the operating point of the air compressor is changed to the point C.
And adjusting the opening of the back pressure valve to enable the operating point of the air compressor to be changed from the point B or the point C to the point D, and simultaneously adjusting the opening of the pressure relief valve to enable the operating point of the air compressor to be changed from the point D to the point E. As can be seen from the direction of power increase along the equal power line, the operating power increases as the air compressor changes from the initial operating point a to E.
In some examples, as shown in fig. 11, the heater 130 is not included in the fuel cell system 100.
As shown in fig. 12, the idle speed control method of the fuel cell system includes:
step S601, when the fuel cell system enters an idle running condition, controlling the rotation speed of a water pump to increase, controlling the rotation speed of a cooling fan to increase, controlling the rotation speed of a hydrogen pump to increase, and controlling the rotation speed of an air compressor to increase;
step S602, judging whether the minimum output power of the electric pile is completely consumed;
if not, the above step S601 is repeatedly performed.
Specifically, when the fuel cell system does not comprise a heater, the minimum output power of the electric pile can be eliminated by increasing the rotation speed of the water pump, the rotation speed of the cooling fan, the rotation speed of the hydrogen pump and the rotation speed of the air compressor, the net output power of the fuel cell system is reduced, the stability of the net output power of the fuel cell system under the idle running condition is improved, meanwhile, the heater is not required to be arranged, and the cost of the fuel cell system is reduced.
The present description is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the specification. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present description have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the disclosure.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present specification without departing from the spirit or scope of the specification. Thus, if such modifications and variations of the present specification fall within the scope of the claims and the equivalents thereof, the present specification is also intended to include such modifications and variations.

Claims (7)

1. An idle speed control method of a fuel cell system, comprising:
judging whether the fuel cell system is in an idle running condition or not;
when the fuel cell system is in the idle running working condition, controlling the running power of energy consumption equipment to be increased so as to reduce the net output power of the fuel cell system;
wherein the energy consumption device comprises at least one of a heater, an air compressor, a radiator fan, a water pump and a hydrogen pump, and the fuel cell system comprises a radiator;
judging whether the heater is in an operating state or not when the fuel cell system is in the idle operating condition;
when the heater is in an operating state, controlling the operating power of the heater to be increased;
when the heater is in a non-operating state, controlling at least one of the operating power of the air compressor, the operating power of the cooling fan, the operating power of the water pump, and the operating power of the hydrogen pump to be increased;
when the heater is in an operating state, acquiring the temperature of the electric pile;
judging whether the temperature of the electric pile is greater than or equal to a preset temperature;
when the temperature of the electric pile is greater than or equal to the preset temperature, controlling at least one of the operation power of the air compressor, the operation power of the cooling fan, the operation power of the water pump and the operation power of the hydrogen pump to be increased;
when the temperature of the electric pile is greater than or equal to a preset temperature, controlling the heat radiator to exchange heat with the heater;
wherein the preset temperature is between 0 ℃ and 40 ℃.
2. The idle speed control method of the fuel cell system according to claim 1, wherein the controlling at least one of the operation power of the air compressor, the operation power of the radiator fan, the operation power of the water pump, and the operation power of the hydrogen pump to be increased includes:
controlling at least one of the operating power of the cooling fan, the operating power of the water pump and the operating power of the hydrogen pump to increase;
obtaining a net output power of the fuel cell system;
judging whether the net output power of the fuel cell system is greater than a set threshold;
when the net output power of the fuel cell system is greater than the set threshold, the operating power of the air compressor is increased.
3. The idle speed control method of the fuel cell system according to claim 1, wherein the controlling at least one of the operation power of the air compressor, the operation power of the radiator fan, the operation power of the water pump, and the operation power of the hydrogen pump to be increased includes:
and controlling the rotation speed of the air compressor to be increased, and/or controlling the rotation speed of the cooling fan to be increased, and/or controlling the rotation speed of the water pump to be increased, and/or controlling the rotation speed of the hydrogen pump to be increased.
4. The idle speed control method of a fuel cell system according to claim 3, wherein the fuel cell system includes a relief valve and a back pressure valve, and the control of the rotational speed of the air compressor further includes, after the increase:
and adjusting the opening degree of the pressure relief valve and/or the back pressure valve.
5. An idle speed control device of a fuel cell system, comprising:
the judging unit is used for judging whether the fuel cell system is in an idle running condition or not;
a control unit for controlling an increase in operating power of the energy consuming device to reduce a net output power of the fuel cell system when the fuel cell system is in the idle operating condition;
wherein the energy consumption device comprises at least one of a heater, an air compressor, a radiator fan, a water pump and a hydrogen pump, and the fuel cell system comprises a radiator;
the control unit is further used for judging whether the heater is in an operating state or not when the fuel cell system is in the idle operating condition;
when the heater is in an operating state, controlling the operating power of the heater to be increased;
when the heater is in a non-operating state, controlling at least one of the operating power of the air compressor, the operating power of the cooling fan, the operating power of the water pump, and the operating power of the hydrogen pump to be increased;
when the heater is in an operating state, acquiring the temperature of the electric pile;
judging whether the temperature of the electric pile is greater than or equal to a preset temperature;
when the temperature of the electric pile is greater than or equal to the preset temperature, controlling at least one of the operation power of the air compressor, the operation power of the cooling fan, the operation power of the water pump and the operation power of the hydrogen pump to be increased;
when the temperature of the electric pile is greater than or equal to a preset temperature, controlling the heat radiator to exchange heat with the heater;
wherein the preset temperature is between 0 ℃ and 40 ℃.
6. An electronic device comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, implement the steps of the idle speed control method of a fuel cell system as claimed in any one of claims 1 to 4.
7. A readable storage medium storing a program which, when executed, enables the steps of the idle speed control method of a fuel cell system according to any one of claims 1 to 4.
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