CN113696748A - Fuel cell power supply system and control method and control device thereof - Google Patents
Fuel cell power supply system and control method and control device thereof Download PDFInfo
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- CN113696748A CN113696748A CN202111003987.9A CN202111003987A CN113696748A CN 113696748 A CN113696748 A CN 113696748A CN 202111003987 A CN202111003987 A CN 202111003987A CN 113696748 A CN113696748 A CN 113696748A
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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
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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
- 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
Abstract
The embodiment of the invention provides a fuel cell power supply system, a control method and a control device thereof. When the actual power is smaller than or equal to a first preset threshold value, controlling a fuel cell power supply set to supply power to an electric load end, controlling a power cell power supply set to be in a standby state, and controlling a relay to be in a closed state so as to charge the power cell power supply set; otherwise, controlling the fuel cell power supply group and the power cell power supply group to jointly supply power to the power load end, and controlling the relay to be in a disconnected state until the working state of the power cell power supply group meets the preset triggering condition. The invention only needs to be configured with a battery with small capacity and small power, thereby reducing 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 and a control method and a control device thereof.
Background
The existing fuel cell vehicle basically adopts a range-extending or electricity-electricity hybrid power supply mode. The extended-range power supply is to charge a power battery through power generation of a fuel system, the power battery is used as a power output unit, the power battery outputs electric energy to a motor 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 power output units to drive the whole vehicle to run.
Because the existing extended range type scheme needs to be provided with a charger to externally charge the power battery when the whole vehicle stops, the electric energy generated by the fuel electric system can be stored in the power battery during the driving process, and the vehicle power is completely derived from the power battery, so that the power battery with high power and large electric quantity needs to be matched. In the existing electric-electric hybrid scheme, vehicle power comes from a power battery and a fuel electric system in the driving process, and the power battery with high power and large electric quantity also needs to be matched, so that the whole cost of the current fuel battery automobile is higher, and the whole weight of the current fuel battery automobile is heavier.
Disclosure of Invention
The embodiment of the invention provides a fuel cell power supply system, a control method and a control device thereof, and solves the technical problems of larger weight and higher cost of a fuel cell automobile power supply system in the related technology.
In a first aspect, the present invention provides a fuel cell power supply system according to an embodiment of the present invention, the system including: a vehicle control unit; the fuel cell power supply set, the power cell power supply set and the relay are respectively connected with the whole vehicle controller, wherein the fuel cell power supply set is connected with the power cell power supply set through the relay; the vehicle controller is used for acquiring actual power required by the vehicle after the vehicle is started; if the actual power is smaller than or equal to a first preset threshold value, controlling the fuel cell power supply set to supply power to an electric load end, controlling the power cell power supply set 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 set until a condition of disconnecting the relay is met; otherwise, controlling the fuel cell power supply group and the power cell power supply group to jointly supply power to the power utilization load end, and controlling the relay to be in a disconnection state until the working state of the power cell power supply group meets a preset trigger condition.
Preferably, the fuel cell power supply group comprises: a fuel cell controller, a fuel cell, and a fuel storage; the fuel cell controller is connected with the vehicle control unit and used for controlling the fuel cell to supply power to the power load end when receiving a starting signal sent by the vehicle control unit; the fuel storage is connected with the fuel cell and used for supplying fuel to the fuel cell so as to meet the normal operation of the fuel cell.
Preferably, the power battery power supply set comprises: a power battery controller and a power battery; and the power battery controller is connected with the vehicle control unit and used for controlling the power battery to supply power to the power load end when receiving a starting signal sent by the vehicle control unit.
Preferably, the vehicle control unit is specifically configured to: in the case that the actual power is greater than the first preset threshold: 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 jointly supply power to the power load end; if the actual power is smaller than the second preset threshold, controlling the fuel cell power supply set to be in a high-efficiency working state, and controlling the power cell power supply set to supply power to the power 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 disconnecting the relay is met; wherein the second preset threshold is greater than the first preset threshold.
Preferably, the vehicle control unit 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 disconnecting the relay is met.
Preferably, the vehicle controller is configured to determine the actual power according to power utilization request information of the vehicle.
In a second aspect, the present invention provides a control method for a fuel cell power supply system, which is applied to any one of the systems in the first aspect, and the method includes: acquiring 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 set to supply power to an electric load end, controlling the power cell power supply set 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 set until a condition of disconnecting the relay is met; otherwise, controlling the fuel cell power supply group and the power cell power supply group to jointly supply power to the power utilization load end, and controlling the relay to be in a disconnection state until the working state of the power cell power supply group meets a preset trigger condition.
Preferably, the controlling the fuel cell power supply group and the power cell power supply group to jointly supply power to the power load end, and controlling the relay to be in an off state until the working state of the power cell power supply group meets a preset trigger condition includes: in the case that the actual power is greater than the first preset threshold: 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 jointly supply power to the power load end; if the actual power is smaller than the second preset threshold, controlling the fuel cell power supply set to be in a high-efficiency working state, and controlling the power cell power supply set to supply power to the power 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 disconnecting 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 group meets a trigger condition, and the trigger condition 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 trigger condition when the electric quantity of the power battery is lower than a first preset electric quantity; the condition for opening the relay is met, and 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 a control device for a fuel cell power supply system, applied to any one of the systems in the first aspect, the device including:
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 set to supply power to an electric load end when the actual power is smaller than or equal to a first preset threshold value, controlling the power cell power supply set 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 set until a condition of disconnecting the relay is met;
and the power supply control unit is also used for controlling the fuel cell power supply group and the power cell power supply group 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 group meets a preset trigger condition when the actual power is greater than the first preset threshold value.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:
and after the whole vehicle is started, acquiring the actual power required by the whole vehicle through the whole vehicle controller. If the actual power is less than or equal to the first preset threshold value, the vehicle control unit controls the fuel cell power supply set to supply power to the power load end, controls the power cell power supply set 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 set until the condition of disconnecting the relay is met, so that the power required by the vehicle is completely supplied by the fuel cell set, and the power cell power supply set can be in a full power state all the time.
If the actual power is larger than a first preset threshold value, the vehicle control unit controls the fuel cell power supply group and the power cell power supply group to jointly supply power to the power load end, and controls the relay to be in a disconnection state until the working state of the power cell power supply group meets a preset trigger condition, and the fuel cell power supply group can supply power to the power load end and simultaneously supply power to the power cell power supply group, so that the power cell power supply group is ensured to have power supply capacity all the time. Because the power is supplied to the electric load end by the fuel cell power supply group preferentially, the power is supplied to the electric load end by the power battery group only when the fuel cell power supply group can not meet the actual power required by the whole vehicle, and only the power battery with smaller battery capacity and smaller output power needs to be configured, thereby reducing the weight of the fuel cell power supply system and reducing the cost of the whole vehicle power supply system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram of the configuration of a fuel cell power supply system in an embodiment of the present invention;
FIG. 2 is a schematic diagram of the fuel cell power pack configuration of FIG. 1;
FIG. 3 is a schematic diagram of the power supply configuration of the fuel cell of FIG. 1;
FIG. 4 is a flow chart of a fuel cell power pack control method according to an embodiment of the present invention;
fig. 5 is a schematic diagram of the structure of a control device of a fuel cell power supply group in an embodiment of the invention.
Detailed Description
The embodiment of the invention provides a fuel cell power supply system, a control method and a control device thereof, and solves the technical problems of larger weight and higher cost of a fuel cell automobile power supply system in the related technology.
In order to solve the technical problems, the embodiment of the invention provides the following general ideas:
the fuel cell power supply set, the power cell power supply set and the relay are respectively connected with the whole vehicle controller, wherein the fuel cell power supply set is connected with the power cell power supply set 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 less than or equal to the first preset threshold, the fuel cell power supply group is controlled to supply power to the power load end, the power cell power supply group is controlled to be in a standby state, the relay is controlled to be in a closed state, the power cell power supply group is charged until the condition of disconnecting the relay is met, and therefore the fact that all the power required by the whole vehicle is provided by the fuel cell group is guaranteed, and the power cell power supply group can be in a full power state all the time. Otherwise, the fuel cell power supply group and the power cell power supply group are controlled to jointly supply power to the power load end, the relay is controlled to be in a disconnected state, and the fuel cell power supply group supplies power to the power cell power supply group while supplying power to the power load end until the working state of the power cell power supply group meets the preset triggering condition, so that the power cell power supply group is ensured to have power supply capacity all the time.
Because the power is supplied to the electric load end by the fuel cell power supply group preferentially, the power is supplied to the electric load end by the power battery group only when the fuel cell power supply group can not meet the actual power required by the whole vehicle, and only the power battery with smaller battery capacity and smaller output power needs to be configured, thereby reducing the weight of the fuel cell power supply system and reducing the cost of the whole vehicle power supply system.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
First, it is stated that the term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein.
In a first aspect, the present invention provides a fuel cell power supply system according to an embodiment of the present invention, which is used for supplying power to a power load end of a finished vehicle, so as to meet a power requirement during a use process of the finished vehicle.
The electric 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: vehicle control unit 100, fuel cell power pack 200, power cell power pack 300, and relay 400. The fuel cell power supply set 200, the power cell power supply set 300 and the relay 400 are respectively connected with the vehicle control unit 100; the fuel cell power supply group 200 is connected to the power cell power supply group 300 through a 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 set when detecting the ignition command, and starts the fuel cell power supply set 200 when the fuel cell power supply set 200 is not abnormal.
In a specific implementation process, a user generates an ignition instruction for the vehicle control unit 100 through an ignition operation, and when the vehicle control unit 100 detects the ignition instruction, the power battery power supply pack 300 is controlled to provide starting electric energy for the fuel battery power supply pack 200, so that the fuel battery power supply pack 200 is started and enters a self-test program.
If no abnormal condition occurs during the execution of the self-test program of the fuel cell power supply set 200, the self-test program is passed and completed; otherwise, the self-checking program is executed again, and a self-checking abnormal signal is sent to the vehicle controller 100, so that the vehicle controller 100 records the abnormal starting condition.
After the self-checking procedure is completed, the fuel cell power supply group 200 feeds back a self-checking completion signal to the vehicle controller 100, and after the vehicle controller 100 receives the self-checking completion signal, the fuel cell power supply group 200 is controlled to supply power to the power consumption load end, so that the vehicle is started.
Specifically, the vehicle controller 100 is configured to obtain 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 utilization request information of the vehicle. The power 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 for stepping on the accelerator pedal is larger, the actual power represented by the power consumption request information is larger.
The power utilization request information can also be determined according to preset running conditions, and the preset running conditions can comprise ambient temperature, running speed, running gradient and four-wheel working state. For example, the lower the ambient temperature, the faster the driving speed, the larger the gradient of the vehicle, and the four wheels are all operating, the larger the actual power represented by the corresponding preset driving condition.
After the fuel cell power supply group 200 starts to work, if the vehicle control unit 100 detects that the actual power is less than or equal to the first preset threshold, the fuel cell power supply group 200 is controlled to supply power to the power load end, the power cell power supply group 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 group 300 until a condition for opening the relay 400 is met.
The first preset threshold may be determined according to the rated output power of the fuel cell power supply set 200, that is, the larger the rated output power of the fuel cell power supply set 200 is, the larger the first preset threshold is. The rated output power of the fuel cell power supply pack 200 may be set to a first preset threshold.
In the specific implementation process, referring to fig. 2, the fuel cell power supply set 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 vehicle control unit 100, and is used for controlling the fuel cell 202 to supply power to an electric load end when receiving a starting signal sent by the vehicle control unit 100; a fuel storage 203 is connected to the fuel cell 202 for supplying fuel to the fuel cell 202 for the normal operation of the fuel cell 202.
In a specific implementation process, please refer to fig. 3, the power battery power supply unit 300 at least includes: a power battery controller 301 and a power battery 302; the power battery controller 301 is connected with the vehicle control unit 100, and is configured to control the power battery 302 to supply power to the power load terminal when receiving a start signal sent by the vehicle control unit 100.
After the fuel cell power supply group 200 starts to work, if the vehicle controller 100 detects that the actual power is greater than the first preset threshold, the fuel cell power supply group 200 and the power cell power supply group 300 are controlled to jointly supply power to the power load end, and the relay 400 is controlled to be in the off state until the working state of the power cell power supply group 300 meets the preset trigger condition.
Specifically, when the actual power is greater than a first preset threshold: and if the vehicle controller 100 detects that the actual power is still greater than the second preset threshold, controlling the fuel cell power supply set 200 and the power cell power supply set 300 to jointly supply power to the electricity load end.
The second preset threshold may be determined according to the rated output power of the fuel cell 202 and the rated output power of 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 is. 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 a specific implementation process, if the actual power is greater than the second preset threshold, the vehicle controller 100 controls the fuel cell power supply set 200 to operate in a high-efficiency region, so as to balance the fuel consumption and the output power, and further increase the endurance mileage of the entire vehicle.
The high efficiency interval of the fuel cell power supply group 200 may be determined according to the type of the fuel cell 202.
If the vehicle controller 100 detects that the actual power is less than the second preset threshold, the fuel cell power supply set 200 is controlled to supply power to the power load end at the rated output power, and meanwhile, the power cell power supply set 300 is controlled to supply power to the power load end at the rated output power, so as to meet the power required during the transient burst of the vehicle.
During this period, if the working state of the power battery power supply set 300 meets the preset trigger condition, the vehicle control unit 100 controls the power battery power supply set 300 to be in the standby state and controls the relay 400 to be in the closed state, so as to charge the power battery 302 until the condition of opening the relay 400 is met; and the second preset threshold is greater than the first preset threshold.
In a specific 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 vehicle controller 100 controls the fuel cell power supply set 200 to operate in a high-efficiency region, so as to balance the fuel consumption and the output power, and further increase the cruising range of the entire vehicle.
In addition, the vehicle control unit 100 controls the power battery power supply set 300 to supply power to the power load, and at this time, the output power of the power battery power supply set 300 is determined according to a power difference, wherein the power difference is obtained based on a difference value between the output power and the actual power when the fuel battery power supply set 200 operates in the high-efficiency section.
When the working state of the power battery power supply set 300 meets the preset triggering condition, the power battery power supply set 300 is controlled to be in a standby state, and the relay 400 is controlled to be in a closed state, so that the power battery 302 is charged until the condition of opening the relay 400 is met.
Specifically, the vehicle control unit 100 may further be configured to: monitoring the electric quantity of the power battery 302, and when the electric quantity of the power battery 302 is lower than a first preset electric quantity, determining that the working state of the power battery power supply set 300 meets a trigger condition; and when the power battery 302 has an electric quantity higher than a second preset electric quantity, determining that the condition for opening the relay 400 is satisfied.
In a second aspect, the invention provides a control method for a fuel cell power supply system, which is applied to any one of the systems in the first aspect.
Referring to fig. 4, the method for controlling the fuel cell power supply system includes the following steps:
step S401: and acquiring the actual power required by the whole vehicle after the whole vehicle is started.
Step S402: and if the actual power is less than or equal to the first preset threshold, controlling the fuel cell power supply set 200 to supply power to the power load end, controlling the power cell power supply set 300 to be in a standby state, and controlling the relay 400 to be in a closed state to charge the power cell power supply set 300 until the condition of opening the relay 400 is met.
Step S403: and if the actual power is greater than the first preset threshold, controlling the fuel cell power supply set 200 and the power cell power supply set 300 to supply power to the power load end together, and controlling the relay 400 to be in the off state until the working state of the power cell power supply set 300 meets the preset trigger condition.
Specifically, the control of the fuel cell power supply set 200 and the power cell power supply set 300 to supply power to the power load end together, and the control of the relay 400 to be in the off state until the working state of the power cell power supply set 300 meets the preset trigger condition includes: in case the actual power is greater than a first preset threshold: if the actual power is larger than a second preset threshold value, controlling the fuel cell power supply set 200 and the power cell power supply set 300 to supply power to the power load end together; if the actual power is smaller than a second preset threshold, controlling the fuel cell power supply set 200 to be in a high-efficiency working state, and controlling the power cell power supply set 300 to supply power to the power load end; when the working state of the power battery power supply set 300 meets the preset trigger condition, controlling the power battery power supply set 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 the condition of opening the relay 400 is met; and the second preset threshold is greater than the first preset threshold.
Specifically, the working state of the power battery power supply set 300 satisfies the triggering condition, which includes: monitoring the electric quantity of the power battery 302, and when the electric quantity of the power battery 302 is lower than a first preset electric quantity, determining that the working state of the power battery power supply set 300 meets a trigger condition; the conditions for opening the relay 400 are satisfied, including: the electric quantity of the power battery 302 is monitored, and when the electric quantity of the power battery 302 is higher than a second preset electric quantity, the condition of opening the relay 400 is judged to be met.
In a third aspect, the invention provides a control device for a fuel cell power supply system, which is applied to any one of the systems in the first aspect.
Referring to fig. 5, the fuel cell power supply system control device includes:
the power acquiring unit 501 is used for acquiring actual power required by the whole vehicle after the whole vehicle is started;
a power supply control unit 502, configured to control the fuel cell power supply set 200 to supply power to the power load terminal, and control the power cell power supply set 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 supply set 300, when the actual power is less than or equal to the first preset threshold, until a condition for opening the relay 400 is satisfied;
the power supply control unit 502 is further configured to, when the actual power is greater than the first preset threshold, control the fuel cell power supply set 200 and the power cell power supply set 300 to supply power to the power load end together, and control the relay 400 to be in the off state until the operating state of the power cell power supply set 300 meets the preset trigger condition.
Since the method for controlling a fuel cell power supply system described in this embodiment is a method for implementing the apparatus for controlling a fuel cell power supply system in the embodiment of the present invention, a person skilled in the art can understand the specific implementation manner of the system of this embodiment and various variations thereof based on the apparatus for controlling a fuel cell power supply system described in this embodiment of the present invention, and therefore, how to implement the system in the embodiment of the present invention is not described in detail herein. The method adopted by the fuel cell power supply system control device in the embodiment of the invention is all within the protection scope of the invention by the skilled person.
The technical scheme in 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 vehicle controller 100 detects that the actual power is less than or equal to the first preset threshold value, the power battery power supply group 200 is controlled to supply power to the power load end, the power battery power supply group 300 is controlled to be in a standby state, and the relay 400 is controlled to be in a closed state, so that the power battery power supply group 300 is charged until the condition of disconnecting the relay 400 is met, thus not only ensuring that the power required by the vehicle is completely provided by the fuel battery 202 group, but also ensuring that the power battery power supply group 300 can be always in a full power state. When the vehicle control unit 100 detects that the actual power is greater than the first preset threshold, the fuel cell power supply set 200 and the power cell power supply set 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 set 300 meets the preset trigger condition, the fuel cell power supply set 200 supplies power to the power load end and simultaneously supplies power to the power cell power supply set 300, so that the power cell power supply set 300 is ensured to have power supply capability all the time.
Because the invention preferentially supplies power to the electric load end through the fuel cell power supply group 200, the power cell 302 group is simultaneously controlled to supply power to the electric load end only when the fuel cell power supply group 200 can not meet the actual power required by the whole vehicle, so that the power cell 302 with smaller battery capacity and smaller output power is only needed to be configured, thereby reducing the weight of the fuel cell power supply system and reducing the cost of the whole vehicle power supply system.
As will be appreciated by one skilled in the art, 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, etc.) having computer-usable code embodied therein.
The present invention has been 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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. Therefore, it is intended that the appended claims be interpreted as including 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 changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A fuel cell power supply system, characterized in that the system comprises:
a vehicle control unit;
the fuel cell power supply set, the power cell power supply set and the relay are respectively connected with the whole vehicle controller, wherein the fuel cell power supply set is connected with the power cell power supply set through the relay;
the vehicle controller is used for acquiring actual power required by the vehicle after the vehicle is started;
if the actual power is smaller than or equal to a first preset threshold value, controlling the fuel cell power supply set to supply power to an electric load end, controlling the power cell power supply set 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 set until a condition of disconnecting the relay is met;
otherwise, controlling the fuel cell power supply group and the power cell power supply group to jointly supply power to the power utilization load end, and controlling the relay to be in a disconnection state until the working state of the power cell power supply group meets a preset trigger condition.
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 vehicle control unit and used for controlling the fuel cell to supply power to the power load end when receiving a starting signal sent by the vehicle control unit;
the fuel storage is connected with the fuel cell and used for supplying fuel to the fuel cell so as to meet the normal operation of the fuel cell.
3. The system of claim 1, wherein the power battery power pack comprises: a power battery controller and a power battery;
and the power battery controller is connected with the vehicle control unit and used for controlling the power battery to supply power to the power load end when receiving a starting signal sent by the vehicle control unit.
4. The system of claim 3, wherein the vehicle control unit is specifically configured to:
in the case that the actual power is greater than the first preset threshold:
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 jointly supply power to the power load end;
if the actual power is smaller than the second preset threshold, controlling the fuel cell power supply set to be in a high-efficiency working state, and controlling the power cell power supply set to supply power to the power 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 disconnecting the relay is met;
wherein the second preset threshold is greater than the first preset threshold.
5. The system of claim 4, wherein the vehicle control unit 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 disconnecting the relay is met.
6. The system of claim 1, wherein the vehicle controller is configured to determine the actual power according to power utilization request information of the vehicle.
7. A fuel cell power supply system control method applied to the system according to any one of claims 1 to 6, the method comprising:
acquiring 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 set to supply power to an electric load end, controlling the power cell power supply set 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 set until a condition of disconnecting the relay is met;
otherwise, controlling the fuel cell power supply group and the power cell power supply group to jointly supply power to the power utilization load end, and controlling the relay to be in a disconnection state until the working state of the power cell power supply group meets a preset trigger condition.
8. The method of claim 7, wherein the controlling the fuel cell power supply set and the power cell power supply set to jointly supply power to the power load terminal and controlling the relay to be in an off state until the working state of the power cell power supply set meets a preset trigger condition comprises:
in the case that the actual power is greater than the first preset threshold:
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 jointly supply power to the power load end;
if the actual power is smaller than the second preset threshold, controlling the fuel cell power supply set to be in a high-efficiency working state, and controlling the power cell power supply set to supply power to the power 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 disconnecting the relay is met;
wherein the second preset threshold is greater than the first preset threshold.
9. The method of claim 8,
the working state of the power battery power supply group meets the triggering condition, and the method 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 trigger condition when the electric quantity of the power battery is lower than a first preset electric quantity;
the condition for opening the relay is met, and 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.
10. A fuel cell power supply system control device applied to the system according to any one of claims 1 to 6, the device 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 set to supply power to an electric load end when the actual power is smaller than or equal to a first preset threshold value, controlling the power cell power supply set 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 set until a condition of disconnecting the relay is met;
and the power supply control unit is also used for controlling the fuel cell power supply group and the power cell power supply group 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 group meets a preset trigger condition when the actual power is greater than the first preset threshold value.
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