CN113696748B - Fuel cell power supply system, control method and control device thereof - Google Patents
Fuel cell power supply system, control method and control device thereof Download PDFInfo
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- CN113696748B CN113696748B CN202111003987.9A CN202111003987A CN113696748B CN 113696748 B CN113696748 B CN 113696748B CN 202111003987 A CN202111003987 A CN 202111003987A CN 113696748 B CN113696748 B CN 113696748B
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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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/75—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using propulsion power supplied by both fuel cells and batteries
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
-
- 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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
- B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
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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
- B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
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- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- 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)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Fuel Cell (AREA)
Abstract
The embodiment of the invention provides a fuel cell power supply system, a control method and a control device thereof, which are connected with a whole vehicle controller respectively through a fuel cell power supply group, a power cell power supply group and a relay, wherein the fuel cell power supply group is connected with the power cell power supply group through the relay, and the actual power required by the whole vehicle is obtained through the whole vehicle controller after the whole vehicle is started. When the actual power is smaller than or equal to a first preset threshold value, controlling the fuel cell power supply group to supply power to the power load end, controlling the power cell power supply group to be in a standby state and controlling the relay to be in a closed state so as to charge the power cell power supply group; otherwise, the fuel cell power supply unit and the power battery power supply unit are controlled to supply power to the power load end together, and the relay is controlled to be in a disconnection state until the working state of the power battery power supply unit meets the preset trigger condition. The invention only needs to configure a battery with small capacity and small power, and reduces the weight and the cost of the whole vehicle power supply system.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a fuel cell power supply system, a control method and a control device thereof.
Background
The existing fuel cell automobile basically adopts a power supply mode of range extension or electric mixing. The range-extending power supply is to charge a power battery through power generation of a fuel system, take the power battery as a power output unit, output electric energy to a motor by the power battery to drive the whole vehicle to run, and the fuel system does not directly drive the whole vehicle; the electric-electric hybrid scheme is that a fuel electric system and a power battery are simultaneously used as a power output unit to drive the whole vehicle to run.
Because the existing range-extending scheme needs to be provided with a charger to externally charge the power battery when the whole vehicle is parked, electric energy generated by the fuel-cell system can be stored in the power battery in the driving process, and the power of the vehicle is all derived from the power battery, so that the power battery with high power and high electric quantity needs to be matched. In the existing electric-electric hybrid scheme, vehicle power is derived from a power battery and a fuel system in the driving process, and the power battery with high power and high electric quantity is matched with the power battery, so that the whole vehicle of the existing fuel cell automobile is high in cost and heavy in weight.
Disclosure of Invention
The embodiment of the invention solves the technical problems of high weight and high cost of a fuel cell automobile power supply system in the related art by providing the fuel cell power supply system, the control method and the control device thereof.
In a first aspect, the present invention provides, by an embodiment of the present invention, a fuel cell power system, the system comprising: a vehicle controller; the fuel cell power supply unit, the power cell power supply unit and the relay are respectively connected with the whole vehicle controller, wherein the fuel cell power supply unit is connected with the power cell power supply unit through the relay; the whole vehicle controller is used for acquiring the actual power required by the whole vehicle after the whole vehicle is started; if the actual power is smaller than or equal to a first preset threshold value, controlling the fuel cell power supply unit to supply power to an electricity load end, controlling the power cell power supply unit to be in a standby state, and controlling the relay to be in a closed state so as to charge the power cell power supply unit until a condition of disconnecting the relay is met; otherwise, the fuel cell power supply unit and the power cell power supply unit are controlled to supply power to the power load end together, and the relay is controlled to be in a disconnection state until the working state of the power cell power supply unit meets a preset triggering condition.
Preferably, the fuel cell power pack includes: a fuel cell controller, a fuel cell, and a fuel storage; the fuel cell controller is connected with the whole vehicle controller and is used for controlling the fuel cell to supply power to the power utilization load end when receiving a starting signal sent by the whole vehicle controller; the fuel storage is connected with the fuel cell and is used for providing fuel for the fuel cell so as to meet the normal operation of the fuel cell.
Preferably, the power battery power supply unit includes: a power battery controller and a power battery; and the power battery controller is connected with the whole vehicle controller and is used for controlling the power battery to supply power to the power utilization load end when receiving a starting signal sent by the whole vehicle controller.
Preferably, the vehicle controller is specifically configured to: in the case that the actual power is greater than the first preset threshold value: if the actual power is larger than a second preset threshold value, controlling the fuel cell power supply group and the power cell power supply group to supply power to the power utilization load end together; if the actual power is smaller than the second preset threshold, controlling the fuel cell power supply group to be in a high-efficiency working state, and controlling the power cell power supply group to supply power to the power utilization load end; when the working state of the power battery power supply group meets the preset triggering condition, controlling the power battery power supply group to be in a standby state and controlling the relay to be in a closed state so as to charge the power battery until the condition of opening the relay is met; wherein the second preset threshold is greater than the first preset threshold.
Preferably, the vehicle controller is further configured to: monitoring the electric quantity of the power battery; when the electric quantity of the power battery is lower than a first preset electric quantity, judging that the working state of the power battery power supply group meets a trigger condition; and when the electric quantity of the power battery is higher than a second preset electric quantity, judging that the condition of switching off the relay is met.
Preferably, the vehicle controller is configured to determine the actual power according to the power consumption request information of the vehicle.
In a second aspect, the present invention provides, according to an embodiment of the present invention, a fuel cell power supply system control method applied to any one of the systems in the first aspect, the method including: acquiring the actual power required by the whole vehicle after the whole vehicle is started; if the actual power is smaller than or equal to a first preset threshold value, controlling the fuel cell power supply unit to supply power to an electricity load end, controlling the power cell power supply unit to be in a standby state, and controlling the relay to be in a closed state so as to charge the power cell power supply unit until a condition of disconnecting the relay is met; otherwise, the fuel cell power supply unit and the power cell power supply unit are controlled to supply power to the power load end together, and the relay is controlled to be in a disconnection state until the working state of the power cell power supply unit meets a preset triggering condition.
Preferably, the controlling the fuel cell power supply unit and the power cell power supply unit to supply power to the power load end together, and controlling the relay to be in a disconnected state until the working state of the power cell power supply unit meets a preset triggering condition includes: in the case that the actual power is greater than the first preset threshold value: if the actual power is larger than a second preset threshold value, controlling the fuel cell power supply group and the power cell power supply group to supply power to the power utilization load end together; if the actual power is smaller than the second preset threshold, controlling the fuel cell power supply group to be in a high-efficiency working state, and controlling the power cell power supply group to supply power to the power utilization load end; when the working state of the power battery power supply group meets the preset triggering condition, controlling the power battery power supply group to be in a standby state and controlling the relay to be in a closed state so as to charge the power battery until the condition of opening the relay is met; wherein the second preset threshold is greater than the first preset threshold.
Preferably, the working state of the power battery power supply unit meets a triggering condition, including: monitoring the electric quantity of the power battery, and judging that the working state of the power battery power supply group meets a triggering condition when the electric quantity of the power battery is lower than a first preset electric quantity; the meeting of the condition for opening the relay comprises the following steps: and monitoring the electric quantity of the power battery, and judging that the condition of disconnecting the relay is met when the electric quantity of the power battery is higher than a second preset electric quantity.
In a third aspect, the present invention provides, by way of an embodiment of the present invention, a fuel cell power supply system control apparatus applied to any one of the systems of the first aspect, the apparatus comprising:
the power acquisition unit is used for acquiring the actual power required by the whole vehicle after the whole vehicle is started;
the power supply control unit is used for controlling the fuel cell power supply unit to supply power to the power utilization load end when the actual power is smaller than or equal to a first preset threshold value, controlling the power cell power supply unit to be in a standby state and controlling the relay to be in a closed state so as to charge the power cell power supply unit until the condition of disconnecting the relay is met;
and the power supply control unit is further used for controlling the fuel cell power supply unit and the power battery power supply unit to supply power to the power utilization load end together when the actual power is larger than the first preset threshold value, and controlling the relay to be in a disconnection state until the working state of the power battery power supply unit meets a preset triggering condition.
One or more technical solutions provided in the embodiments of the present invention at least have the following technical effects or advantages:
after the whole vehicle is started, the actual power required by the whole vehicle is obtained through the whole vehicle controller. If the actual power is smaller than or equal to the first preset threshold value, the whole vehicle controller controls the fuel cell power supply unit to supply power to the power utilization load end, controls the power cell power supply unit to be in a standby state and controls the relay to be in a closed state so as to charge the power cell power supply unit until the condition of opening the relay is met, so that the power required by the whole vehicle is all provided by the fuel cell unit, and the power cell power supply unit can be always in a full-power state.
If the actual power is greater than the first preset threshold value, the whole vehicle controller controls the fuel cell power supply unit and the power battery power supply unit to supply power to the power utilization load end together, and controls the relay to be in a disconnection state until the working state of the power battery power supply unit meets the preset triggering condition, and the fuel cell power supply unit supplies power to the power battery power supply unit while supplying power to the power utilization load end so as to ensure that the power battery power supply unit has power supply capability all the time. Because the invention supplies power to the power utilization load end by the fuel cell power supply group preferentially, the power supply load end is controlled to be supplied with power by the power cell group only when the fuel cell power supply group cannot meet the actual power required by the whole vehicle, and therefore, only the power cell with smaller cell capacity and smaller output power is required to be configured, thereby reducing the weight of the fuel cell power supply system and the cost of the whole vehicle power supply system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other 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 fuel cell power system according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of the fuel cell power pack configuration of FIG. 1;
FIG. 3 is a schematic illustration of the fuel cell power pack configuration of FIG. 1;
FIG. 4 is a flow chart of a fuel cell power stack control method in accordance with an embodiment of the present invention;
fig. 5 is a schematic diagram of a fuel cell power pack control apparatus according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention solves the technical problems of high weight and high cost of a fuel cell automobile power supply system in the related art by providing the fuel cell power supply system, the control method and the control device thereof.
The technical scheme provided by the embodiment of the invention aims to solve the technical problems, and the overall thought is as follows:
the fuel cell power supply unit, the power cell power supply unit and the relay are respectively connected with the whole vehicle controller, wherein the fuel cell power supply unit is connected with the power cell power supply unit through the relay, and the actual power required by the whole vehicle is obtained through the whole vehicle controller after the whole vehicle is started.
If the actual power is smaller than or equal to the first preset threshold value, the fuel cell power supply unit is controlled to supply power to the power utilization load end, the power cell power supply unit is controlled to be in a standby state, and the relay is controlled to be in a closed state so as to charge the power cell power supply unit until the condition of disconnecting the relay is met, so that the power required by the whole vehicle is all provided by the fuel cell unit, and the power cell power supply unit can be always in a full-power state. Otherwise, the fuel cell power supply unit and the power battery power supply unit are controlled to supply power to the power utilization load end together, and the relay is controlled to be in a disconnection state until the working state of the power battery power supply unit meets the preset triggering condition, and the fuel cell power supply unit supplies power to the power battery power supply unit while supplying power to the power utilization load end so as to ensure that the power battery power supply unit always has power supply capability.
Because the invention supplies power to the power utilization load end by the fuel cell power supply group preferentially, the power supply load end is controlled to be supplied with power by the power cell group only when the fuel cell power supply group cannot meet the actual power required by the whole vehicle, and therefore, only the power cell with smaller cell capacity and smaller output power is required to be configured, thereby reducing the weight of the fuel cell power supply system and the cost of the whole vehicle power supply system.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
First, the term "and/or" appearing herein is merely an association relationship describing associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be capable of operation in sequences other than those illustrated or otherwise described.
In a first aspect, according to an embodiment of the present invention, a fuel cell power supply system is provided for supplying power to an electric load end of a whole vehicle, so as to meet a power demand in a use process of the whole vehicle.
The power utilization load end can comprise an air conditioner, a driving motor, a vehicle-mounted socket, a steering power assisting device and the like.
Referring to fig. 1, the system includes: the vehicle control unit 100, the fuel cell power unit 200, the power cell power unit 300, and the relay 400. The fuel cell power supply unit 200, the power cell power supply unit 300 and the relay 400 are respectively connected with the whole vehicle controller 100; fuel cell power stack 200 is connected to power cell power stack 300 through relay 400.
Specifically, before the vehicle controller 100 obtains the actual power required by the vehicle, the vehicle controller 100 checks the fuel cell power supply unit when detecting the ignition command, and starts the fuel cell power supply unit 200 when the fuel cell power supply unit 200 is not abnormal.
In a specific implementation process, a user generates an ignition command by using an ignition operation to the whole vehicle controller 100, and when the whole vehicle controller 100 detects the ignition command, the power battery power supply unit 300 is controlled to provide starting power for the fuel battery power supply unit 200, so that the fuel battery power supply unit 200 is started and enters a self-checking program.
If no abnormal condition occurs in the process of executing the self-checking procedure, the fuel cell power supply unit 200 passes through and completes the self-checking procedure; otherwise, the self-checking program is re-executed, and a self-checking abnormal signal is sent to the whole vehicle controller 100, so that the whole vehicle controller 100 records the starting abnormal condition.
After the self-checking procedure is completed, the fuel cell power supply unit 200 feeds back a self-checking completion signal to the whole vehicle controller 100, and after the whole vehicle controller 100 receives the self-checking completion signal, the fuel cell power supply unit 200 is controlled to supply power to the power utilization load end, so that the whole vehicle starting is completed.
Specifically, the vehicle controller 100 is configured to obtain the actual power required by the vehicle after the vehicle is started.
In a specific implementation process, the vehicle controller 100 may determine the actual power according to the power consumption request information of the vehicle. The electricity consumption request information may be determined according to the control of the user on the travel of the accelerator pedal, for example, if the travel of the user pressing the accelerator pedal is larger, the actual power represented by the electricity consumption request information is larger.
The electricity consumption request information can be determined according to preset running conditions, and the preset running conditions can comprise ambient temperature, running speed, running gradient and four-wheel working states. For example, the lower the ambient temperature, the faster the running speed, the greater the running gradient, and the four wheels are all operating, the greater the actual power represented by the preset running condition.
After the fuel cell power stack 200 starts to operate, if the vehicle controller 100 detects that the actual power is less than or equal to the first preset threshold, the fuel cell power stack 200 is controlled to supply power to the power load side, the power cell power stack 300 is controlled to be in a standby state, and the relay 400 is controlled to be in a closed state, so as to charge the power cell power stack 300 until a condition for opening the relay 400 is satisfied.
The first preset threshold may be determined according to the rated output power of the fuel cell power stack 200, that is, the larger the rated output power of the fuel cell power stack 200, the larger the first preset threshold. The rated output power of the fuel cell power stack 200 may be set to a first preset threshold.
In the implementation, referring to fig. 2, the fuel cell power unit 200 at least includes: a fuel cell controller 201, a fuel cell 202, and a fuel storage 203. The fuel cell 202 controller 201 is connected with the whole vehicle controller 100, and is used for controlling the fuel cell 202 to supply power to the power load end when receiving a starting signal sent by the whole vehicle controller 100; a fuel storage 203 is connected to the fuel cell 202 for supplying fuel to the fuel cell 202 to satisfy the normal operation of the fuel cell 202.
In the implementation, referring to fig. 3, the power battery pack 300 at least includes: a power battery controller 301 and a power battery 302; the power battery controller 301 is connected to the vehicle controller 100, and is configured to control the power battery 302 to supply power to the power load end when receiving a start signal sent by the vehicle controller 100.
After the fuel cell power supply unit 200 starts to operate, if the vehicle controller 100 detects that the actual power is greater than the first preset threshold, the fuel cell power supply unit 200 and the power cell power supply unit 300 are controlled to supply power to the power load end together, and the relay 400 is controlled to be in an off state until the operating state of the power cell power supply unit 300 meets the preset triggering condition.
Specifically, in the case that the actual power is greater than the first preset threshold value: if the vehicle controller 100 detects that the actual power is still greater than the second preset threshold, the fuel cell power supply unit 200 and the power cell power supply unit 300 are controlled to supply power to the power load end together.
The second preset threshold may be determined according to the rated output power of the fuel cell 202 and the power cell 302, and specifically, the larger the sum of the rated output power of the fuel cell 202 and the rated output power of the power cell 302, the larger the second preset threshold. The sum of the rated output powers of the fuel cell 202 and the power cell 302 may be set to a second preset threshold.
In the implementation process, if the actual power is greater than the second preset threshold, the vehicle controller 100 controls the fuel cell power supply unit 200 to operate in the high-efficiency zone, so as to balance the fuel consumption and the output power, and further increase the endurance mileage of the vehicle.
The high efficiency interval of fuel cell power stack 200 may be determined based on the type of fuel cell 202.
If the vehicle controller 100 detects that the actual power is smaller than the second preset threshold, the fuel cell power supply unit 200 is controlled to supply power to the electric load end with the rated output power, and meanwhile, the power cell power supply unit 300 is controlled to supply power to the electric load end with the rated output power so as to meet the power required by the short burst of the vehicle.
During this period, if the operating state of the power battery power supply unit 300 meets the preset triggering condition, the whole vehicle controller 100 controls the power battery power supply unit 300 to be in a standby state and controls the relay 400 to be in a closed state so as to charge the power battery 302 until the condition of opening the relay 400 is met; wherein the second preset threshold is greater than the first preset threshold.
In the implementation process, if the actual power is greater than the first preset threshold and the actual power is less than the second preset threshold, the whole vehicle controller 100 controls the fuel cell power supply unit 200 to operate in the high-efficiency interval, so as to balance the fuel consumption and the output power, and further increase the endurance mileage of the whole vehicle.
In addition, the vehicle controller 100 controls the power battery pack 300 to supply power to the power load, and at this time, the output power of the power battery pack 300 is determined according to a power difference, where the power difference is obtained based on a difference between the output power and the actual power when the fuel battery pack 200 operates in the high-efficiency zone.
When the operating state of the power battery pack 300 satisfies a preset trigger condition, the power battery pack 300 is controlled to be in a standby state, and the relay 400 is controlled to be in a closed state, so as to charge the power battery 302 until a condition of opening the relay 400 is satisfied.
Specifically, the vehicle controller 100 may also be configured to: monitoring the electric quantity of the power battery 302, and judging that the working state of the power battery power supply unit 300 meets the triggering condition when the electric quantity of the power battery 302 is lower than a first preset electric quantity; and determining that the condition for opening the relay 400 is satisfied when the electric quantity of the power battery 302 is higher than a second preset electric quantity.
In a second aspect, the present invention provides, by an embodiment of the present invention, a fuel cell power supply system control method applied to any one of the systems of the first aspect.
Referring to fig. 4, the fuel cell power system control method includes the steps of:
step S401: and acquiring the actual power required by the whole vehicle after the whole vehicle is started.
Step S402: if the actual power is less than or equal to the first preset threshold, the fuel cell power supply unit 200 is controlled to supply power to the power load end, the power cell power supply unit 300 is controlled to be in a standby state, and the relay 400 is controlled to be in a closed state, so as to charge the power cell power supply unit 300 until a condition of opening the relay 400 is satisfied.
Step S403: if the actual power is greater than the first preset threshold, the fuel cell power supply unit 200 and the power cell power supply unit 300 are controlled to supply power to the power load end together, and the relay 400 is controlled to be in the off state until the working state of the power cell power supply unit 300 meets the preset triggering condition.
Specifically, controlling the fuel cell power supply unit 200 and the power cell power supply unit 300 to supply power to the power load end together, and controlling the relay 400 to be in an off state until the working state of the power cell power supply unit 300 meets the preset triggering condition includes: in case the actual power is greater than a first preset threshold: if the actual power is still greater than the second preset threshold, controlling the fuel cell power supply group 200 and the power cell power supply group 300 to supply power to the power utilization load end together; if the actual power is smaller than the second preset threshold, the fuel cell power supply unit 200 is controlled to be in a high-efficiency working state, and the power cell power supply unit 300 is controlled to supply power to the power utilization load end; when the working state of the power battery power supply unit 300 meets a preset triggering condition, controlling the power battery power supply unit 300 to be in a standby state and controlling the relay 400 to be in a closed state so as to charge the power battery 302 until a condition of opening the relay 400 is met; wherein the second preset threshold is greater than the first preset threshold.
Specifically, the operating state of the power battery pack 300 satisfies the triggering condition, including: monitoring the electric quantity of the power battery 302, and judging that the working state of the power battery power supply unit 300 meets the triggering condition when the electric quantity of the power battery 302 is lower than a first preset electric quantity; satisfying the condition of opening the relay 400 includes: the power level of the power cell 302 is monitored and it is determined that the condition for opening the relay 400 is satisfied when the power level of the power cell 302 is higher than a second preset power level.
In a third aspect, the present invention provides, by an embodiment of the present invention, a fuel cell power supply system control apparatus applied to any one of the systems of the first aspect.
Referring to fig. 5, the fuel cell power system control apparatus includes:
the power obtaining unit 501 is configured to obtain actual power required by the whole vehicle after the whole vehicle is started;
a power supply control unit 502, configured to control, when the actual power is less than or equal to a first preset threshold, the fuel cell power unit 200 to supply power to the power load end, and control the power cell power unit 300 to be in a standby state, and control the relay 400 to be in a closed state, so as to charge the power cell power unit 300 until a condition of opening the relay 400 is satisfied;
the power supply control unit 502 is further configured to control the fuel cell power supply unit 200 and the power cell power supply unit 300 to supply power to the power load terminal together when the actual power is greater than the first preset threshold, and control the relay 400 to be in an off state until the working state of the power cell power supply unit 300 meets a preset triggering condition.
Since the fuel cell power system control method described in this embodiment is a method adopted for implementing the fuel cell power system control device in this embodiment, those skilled in the art will be able to understand the specific implementation of the system in this embodiment and various modifications thereof based on the fuel cell power system control device described in this embodiment, so how this system is implemented in this embodiment will not be described in detail herein. The method adopted by the fuel cell power system control device in the embodiment of the invention is within the scope of the invention to be protected as long as the person skilled in the art implements the method.
The technical scheme provided by the embodiment of the invention at least has the following technical effects or advantages:
in the fuel cell power supply system disclosed by the invention, when the whole vehicle controller 100 detects that the actual power is smaller than or equal to the first preset threshold value, the fuel cell power supply unit 200 is controlled to supply power to the power utilization load end, the power cell power supply unit 300 is controlled to be in a standby state, and the relay 400 is controlled to be in a closed state so as to charge the power cell power supply unit 300 until the condition of disconnecting the relay 400 is met, so that the power required by the whole vehicle is completely supplied by the fuel cell 202 unit, and the power cell power supply unit 300 can be always in a full-power state. When the whole vehicle controller 100 detects that the actual power is greater than the first preset threshold, the fuel cell power supply unit 200 and the power cell power supply unit 300 are controlled to supply power to the power utilization load end together, and the relay 400 is controlled to be in a disconnection state until the working state of the power cell power supply unit 300 meets the preset triggering condition, and the fuel cell power supply unit 200 supplies power to the power utilization load end and simultaneously supplies power to the power cell power supply unit 300 so as to ensure that the power cell power supply unit 300 has power supply capability all the time.
Because the invention supplies power to the electricity load end preferentially through the fuel cell power supply group 200, the power supply of the power cell 302 group to the electricity load end is controlled only when the fuel cell power supply group 200 can not meet the actual power required by the whole car, so that only the power cell 302 with smaller battery capacity and smaller output power is configured, thereby reducing the weight of the fuel cell power supply system and the cost of the whole car power supply system.
It should be appreciated by those skilled in the art that embodiments of the present invention may be provided as a system, or computer product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the invention may take the form of a computer product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of systems, apparatuses (systems) and computer products according to embodiments of the invention. 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 instructions. These computer 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 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 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 invention 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 invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. A fuel cell power system, the system comprising:
a vehicle controller;
the fuel cell power supply unit, the power cell power supply unit and the relay are respectively connected with the whole vehicle controller, wherein the fuel cell power supply unit is connected with the power cell power supply unit through the relay;
the whole vehicle controller is used for acquiring the actual power required by the whole vehicle after the whole vehicle is started;
if the actual power is smaller than or equal to a first preset threshold value, controlling the fuel cell power supply unit to supply power to an electricity load end, controlling the power cell power supply unit to be in a standby state, and controlling the relay to be in a closed state so as to charge the power cell power supply unit until a condition of disconnecting the relay is met;
otherwise, controlling the fuel cell power supply unit and the power cell power supply unit to supply power to the power load end together, and controlling the relay to be in a disconnection state until the working state of the power cell power supply unit meets a preset triggering condition;
the power battery power supply group includes: a power battery controller and a power battery;
the power battery controller is connected with the whole vehicle controller and is used for controlling the power battery to supply power to the power utilization load end when receiving a starting signal sent by the whole vehicle controller;
the whole vehicle controller is specifically used for:
in the case that the actual power is greater than the first preset threshold value:
if the actual power is larger than a second preset threshold value, controlling the fuel cell power supply group and the power cell power supply group to supply power to the power utilization load end together;
if the actual power is smaller than the second preset threshold, controlling the fuel cell power supply group to be in a high-efficiency working state, and controlling the power cell power supply group to supply power to the power utilization load end;
when the working state of the power battery power supply group meets the preset triggering condition, controlling the power battery power supply group to be in a standby state and controlling the relay to be in a closed state so as to charge the power battery until the condition of opening the relay is met;
wherein the second preset threshold is greater than the first preset threshold.
2. The system of claim 1, wherein the fuel cell power pack comprises: a fuel cell controller, a fuel cell, and a fuel storage;
the fuel cell controller is connected with the whole vehicle controller and is used for controlling the fuel cell to supply power to the power utilization load end when receiving a starting signal sent by the whole vehicle controller;
the fuel storage is connected with the fuel cell and is used for providing fuel for the fuel cell so as to meet the normal operation of the fuel cell.
3. The system of claim 1, wherein the vehicle controller is further configured to:
monitoring the electric quantity of the power battery;
when the electric quantity of the power battery is lower than a first preset electric quantity, judging that the working state of the power battery power supply group meets a trigger condition;
and when the electric quantity of the power battery is higher than a second preset electric quantity, judging that the condition of switching off the relay is met.
4. The system of claim 1, wherein the vehicle controller is configured to determine the actual power based on vehicle power consumption request information.
5. A fuel cell power supply system control method, characterized by being applied to the system according to any one of claims 1 to 4, comprising:
acquiring the actual power required by the whole vehicle after the whole vehicle is started;
if the actual power is smaller than or equal to a first preset threshold value, controlling the fuel cell power supply unit to supply power to an electricity load end, controlling the power cell power supply unit to be in a standby state, and controlling the relay to be in a closed state so as to charge the power cell power supply unit until a condition of disconnecting the relay is met;
otherwise, the fuel cell power supply unit and the power cell power supply unit are controlled to supply power to the power load end together, and the relay is controlled to be in a disconnection state until the working state of the power cell power supply unit meets a preset triggering condition.
6. The method of claim 5, wherein controlling the fuel cell power pack and the power cell power pack to jointly supply power to the power load terminal and controlling the relay to be in an off state until the operating state of the power cell power pack meets a preset trigger condition comprises:
in the case that the actual power is greater than the first preset threshold value:
if the actual power is larger than a second preset threshold value, controlling the fuel cell power supply group and the power cell power supply group to supply power to the power utilization load end together;
if the actual power is smaller than the second preset threshold, controlling the fuel cell power supply group to be in a high-efficiency working state, and controlling the power cell power supply group to supply power to the power utilization load end;
when the working state of the power battery power supply group meets the preset triggering condition, controlling the power battery power supply group to be in a standby state and controlling the relay to be in a closed state so as to charge the power battery until the condition of opening the relay is met;
wherein the second preset threshold is greater than the first preset threshold.
7. The method of claim 6, wherein,
the working state of the power battery power supply group meets the triggering condition and comprises the following steps:
monitoring the electric quantity of the power battery, and judging that the working state of the power battery power supply group meets a triggering condition when the electric quantity of the power battery is lower than a first preset electric quantity;
the meeting of the condition for opening the relay comprises the following steps:
and monitoring the electric quantity of the power battery, and judging that the condition of disconnecting the relay is met when the electric quantity of the power battery is higher than a second preset electric quantity.
8. A fuel cell power supply system control apparatus, applied to the system according to any one of claims 1 to 4, comprising:
the power acquisition unit is used for acquiring the actual power required by the whole vehicle after the whole vehicle is started;
the power supply control unit is used for controlling the fuel cell power supply unit to supply power to the power utilization load end when the actual power is smaller than or equal to a first preset threshold value, controlling the power cell power supply unit to be in a standby state and controlling the relay to be in a closed state so as to charge the power cell power supply unit until the condition of disconnecting the relay is met;
and the power supply control unit is further used for controlling the fuel cell power supply unit and the power battery power supply unit to supply power to the power utilization load end together when the actual power is larger than the first preset threshold value, and controlling the relay to be in a disconnection state until the working state of the power battery power supply unit meets a preset triggering condition.
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