CN110722990B - Hydrogen fuel cell vehicle power system supporting emergency rescue and control method thereof - Google Patents
Hydrogen fuel cell vehicle power system supporting emergency rescue and control method thereof Download PDFInfo
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- CN110722990B CN110722990B CN201911050867.7A CN201911050867A CN110722990B CN 110722990 B CN110722990 B CN 110722990B CN 201911050867 A CN201911050867 A CN 201911050867A CN 110722990 B CN110722990 B CN 110722990B
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0053—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to fuel cells
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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
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using 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
- 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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- Electric Propulsion And Braking For Vehicles (AREA)
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Abstract
The invention discloses a hydrogen fuel cell vehicle power system supporting emergency rescue and a control method thereof, and the implementation of the invention has the beneficial effects that the power cell meets the design of an external charging scheme: the battery pack has a circuit design scheme with high reliability; the universality of the external connector is strong; the cost is low. The emergency rescue control method comprises the following steps: the external power supply emergency charging method can be used when the electric quantity of the external power supply is sufficient; the self-charging control method of the whole vehicle comprises the following steps: when the external power supply is used for starting the fuel cell, the fuel cell system can independently generate power to charge the power cell.
Description
Technical Field
The invention relates to the field of hydrogen fuel cell vehicles, in particular to a power system of a hydrogen fuel cell vehicle supporting emergency rescue and a control method thereof.
Background
Along with the increasing environmental awareness of people, the development speed of new energy automobiles is extremely fast. Among them, the development of hybrid power and hydrogen fuel cell passenger cars is particularly remarkable. The power battery is one of important parts of the two types of vehicle types. The battery has the following common characteristics:
1) The capacity of the matched power battery is small;
2) The self-discharge rate of the matched power battery is high;
3) The designed vehicle type is not provided with an alternating current-direct current charging interface because of cost and performance requirements.
Based on the characteristics, the problem that the whole vehicle cannot be started can occur when the whole vehicle is placed for a long time, the power battery fails or the power supply is severe.
Disclosure of Invention
Under the condition of no external standard charging interface, one of the methods for solving the problems is to design a low-cost power system scheme and a control method capable of being externally charged, so that the power battery can be charged and rescued under the condition of an external power supply capable of being matched with the power system scheme. Meanwhile, when the electric quantity of the external power supply is insufficient, the power supply only needs to use a small amount of electric quantity to supply power to the fuel cell engine for starting, and the fuel system can charge the power battery, so that the feeding problem of the power battery is solved.
According to one aspect of the invention, the technical scheme adopted by the invention for solving the technical problems is as follows: the power system of the hydrogen fuel cell vehicle supporting emergency rescue is constructed and comprises a fuel cell system, a power cell system, a whole vehicle distribution box and electric equipment, wherein the electric equipment comprises a motor controller MCU and whole vehicle electric equipment VEE;
the power battery system comprises a battery B1, a battery pre-charging loop, a quick charging relay K1, a connector C1, an emergency charging port C5, a battery management system BMS and a battery main negative relay K4, wherein the battery pre-charging loop comprises a main positive relay K2, a pre-charging relay K3 and a pre-charging resistor R1, the pre-charging relay K3 and the pre-charging resistor R1 are connected in series and then connected with the main positive relay K2 in parallel, the parallel connection of the pre-charging resistor R1 is connected with the positive electrode of the connector C1, the parallel connection of the pre-charging relay K3 is connected with the positive electrode of the battery B1, the negative electrode of the connector C1 is connected with one end of the battery main negative relay K4, and the other end of the battery main negative relay K4 is connected with the negative electrode of the battery B1; meanwhile, the anode of the battery B1 is connected with the anode of an external emergency charging port C5 after being connected with an external emergency charging relay K1, and the cathode of the external emergency charging port C5 is directly connected with the cathode of the battery B1; k1, K2, K3 and K4 are all connected and controlled by the BMS;
the fuel cell system comprises a fuel cell pile FCES, a boost voltage converter and a positive electrode connector C3, wherein the fuel cell pile FCES and the boost voltage converter are respectively connected through a positive electrode relay K5 and a negative electrode relay K6, the positive electrode and the negative electrode of the positive electrode connector C3 at the output end of the boost voltage converter are connected with the negative electrode of the C3, and the relays K5 and K6 are connected and controlled by a fuel cell management system FCU;
the whole-vehicle distribution box comprises a connector C2, a connector C4, a connector C6, a connector C8, a motor controller MCU pre-charging loop, a positive relay K9 of a whole-vehicle electric device VEE and a whole-vehicle main negative relay K10, wherein the motor controller MCU pre-charging loop comprises a main positive relay K7, a pre-charging relay K8 and a pre-charging resistor R2; the positive pole of the connector C2 is divided into two branches, the first branch is connected with the positive pole of the connector C4, the second branch is respectively connected with one end of the main positive relay K7 and one end of the pre-charging relay K8, the other end of the pre-charging relay K8 is connected with the other end of one end of the main positive relay K7, and after the pre-charging resistor R2 is connected in series, the positive pole of the connector C6 is simultaneously connected with one end of the positive relay K9, and the other end of the relay K9 is connected with the negative pole of the connector C8; the negative pole of the connector C2 is output and is also divided into two branches, the first branch is connected with the negative pole of the connector C4, the first branch is connected with one end of the main negative relay K10 of the whole vehicle, and the other end of the K10 is respectively connected with the negative poles of the connector C6 and the connector C8; the relays K7, K8, K9 and K10 are all connected and controlled by the vehicle control unit VCU;
the electric equipment further comprises a connector C7 and a connector C9, the motor controller MCU is connected with the connector C6 in a butt-joint way through the connector C7, and the electric equipment VEE of the whole car is connected with the connector C8 in a butt-joint way through the connector C9;
the power battery system and the fuel battery system are directly connected in parallel through connectors C1, C2, C3 and C4, wherein the connectors C1 and C2 are connected in a butt-plug manner, and the connectors C3 and C4 are connected in a butt-plug manner.
Furthermore, in the hydrogen fuel cell vehicle power system supporting emergency rescue, the VCU, BMS, FCU controllers are simultaneously hung on the same CAN bus.
Furthermore, the power system of the hydrogen fuel cell vehicle supporting emergency rescue further comprises an emergency charging analog switch, wherein the emergency charging analog switch is arranged in a cab and connected with the VCU.
Further, in the hydrogen fuel cell vehicle power system supporting emergency rescue of the present invention, the battery management system BMS is a master-slave integrated machine.
Furthermore, in the hydrogen fuel cell vehicle power system supporting emergency rescue, the external charging port C5 adopts a standard external charging port.
According to one aspect of the invention, the invention solves the technical problems, and also provides a control method applied to the hydrogen fuel cell vehicle power system supporting emergency rescue, which comprises an external power supply charging control method and a vehicle automatic charging control method;
the control flow of the external power supply charging control method is as follows:
s11, completing connection work of an external charging device through an emergency charging port C5;
s12, ON-gear piezoelectric power is applied to the whole vehicle, and the BMS attracts the relay K1;
s13, setting charging voltage and current of an external charging device, and starting the external charging device;
s14, when the SOC of the battery is more than k%, closing the external charging device to finish emergency charging, wherein k is E (10, 100);
the automatic charging control method of the whole vehicle starts a fuel cell system by using an external power supply, and then charges a power battery by using a fuel cell, wherein the flow of the automatic charging control method of the whole vehicle is as follows:
s21, completing connection work of an external charging device through an emergency charging port C5;
s22, ON-gear piezoelectric power is applied to the whole vehicle, and the BMS attracts the relay K1;
s23, setting charging voltage and current of an external charging device, and starting the external charging device;
s24, receiving an emergency charging mode switch signal generated by triggering an emergency charging mode switch;
s25, the VCU receives the emergency charging mode switch signal, the whole vehicle enters an emergency charging mode, and the VCU enables the FCU and sets power requirements;
s26, the FCU controls the relays K5 and K6 to be attracted, enables the boost voltage converter and enables the fuel cell system to start generating electricity;
s27, externally connecting a charging device, completing emergency charging, and independently charging the battery B1 by the fuel cell;
s28, when the VCU detects that the single power battery SOC is more than or equal to n%, the VCU controls the FCU to enter a power-down flow, the whole vehicle is powered down, and charging is finished; k is E (10, 100).
Further, in the control method of the present invention, in the control flow of the external power charging control method, the battery B1 has a self-protection function, and when a serious fault occurs, the BMS actively turns off the emergency charging relay K1, ending the charging.
Further, in the control method of the invention, in the flow of the automatic charging control method of the whole vehicle, the power system of the hydrogen fuel cell vehicle supporting emergency rescue has a self-protection function, when serious faults occur, the VCU controls the fuel cell FCU to enter a power-down flow through a message, the whole vehicle is powered down, and the charging is finished.
Further, in the control method of the present invention, k=n=50.
The hydrogen fuel cell vehicle power system supporting emergency rescue and the control method thereof have the following beneficial effects:
the power battery meets the design of an external charging scheme: the battery pack has a circuit design scheme with high reliability; the universality of the external connector is strong; the cost is low.
The emergency rescue control method comprises the following steps: the external power supply emergency charging method can be used when the electric quantity of the external power supply is sufficient; the self-charging control method of the whole vehicle comprises the following steps: when the external power supply is used for starting the fuel cell, the fuel cell system can independently generate power to charge the power cell.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic circuit diagram of an embodiment of a hydrogen fuel cell vehicle powertrain supporting emergency rescue;
FIG. 2 is a schematic diagram of a connection of VCU, BMS, FCU to a CAN bus;
FIG. 3 is an external emergency charging flow chart;
fig. 4 is a flow chart of the self-charging control of the fuel cell system.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
Referring to FIG. 1, a schematic circuit diagram of an embodiment of a hydrogen fuel cell vehicle powertrain supporting emergency rescue is shown. The hydrogen fuel cell car power system supporting emergency rescue of the embodiment comprises a fuel cell system, a power cell system, a whole car distribution box and electric equipment, wherein the electric equipment comprises a motor controller MCU and whole car electric equipment VEE (Vehicle electrical equipment).
The power battery system comprises a battery B1, a battery pre-charging loop, a quick charging relay K1, a connector C1, an emergency charging port C5, a battery management system BMS and a battery main negative relay K4, wherein the battery pre-charging loop comprises a main positive relay K2, a pre-charging relay K3 and a pre-charging resistor R1, the pre-charging relay K3 and the pre-charging resistor R1 are connected in series and then connected with the main positive relay K2 in parallel, the parallel connection of the pre-charging resistor R1 is connected with the positive electrode of the connector C1, the parallel connection of the pre-charging relay K3 is connected with the positive electrode of the battery B1, the negative electrode of the connector C1 is connected with one end of the battery main negative relay K4, and the other end of the battery main negative relay K4 is connected with the negative electrode of the battery B1; meanwhile, the anode of the battery B1 is connected with the anode of an external emergency charging port C5 after being connected with an external emergency charging relay K1, and the cathode of the external emergency charging port C5 is directly connected with the cathode of the battery B1; the battery management system BMS is a master-slave integrated machine, and K1, K2, K3 and K4 are all connected and controlled by the BMS.
The fuel cell system comprises a fuel cell stack FCES (Fuel cell engine system), a Boost voltage converter (namely, boost DCDC) and a positive electrode connector C3, wherein the fuel cell stack FCES and the Boost voltage converter are respectively connected through a positive electrode relay K5 and a negative electrode relay K6, the positive electrode and the negative electrode of the positive electrode connector C3 at the output end of the Boost voltage converter are connected with the negative electrode of the C3, and the relays K5 and K6 are both connected and controlled by a fuel cell management system FCU;
the whole-vehicle distribution box comprises a connector C2, a connector C4, a connector C6, a connector C8, a motor controller MCU pre-charging loop, a positive relay K9 of a whole-vehicle electric device VEE and a whole-vehicle main negative relay K10, wherein the motor controller MCU pre-charging loop comprises a main positive relay K7, a pre-charging relay K8 and a pre-charging resistor R2; the positive pole of the connector C2 is divided into two branches, the first branch is connected with the positive pole of the connector C4, the second branch is respectively connected with one end of the main positive relay K7 and one end of the pre-charging relay K8, the other end of the pre-charging relay K8 is connected with the other end of one end of the main positive relay K7, and after the pre-charging resistor R2 is connected in series, the positive pole of the connector C6 is simultaneously connected with one end of the positive relay K9, and the other end of the relay K9 is connected with the negative pole of the connector C8; the negative pole of the connector C2 is output and is also divided into two branches, the first branch is connected with the negative pole of the connector C4, the first branch is connected with one end of the main negative relay K10 of the whole vehicle, and the other end of the K10 is respectively connected with the negative poles of the connector C6 and the connector C8; the relays K7, K8, K9 and K10 are all connected and controlled by the vehicle control unit VCU.
The electric equipment further comprises a connector C7 and a connector C9, the motor controller MCU is connected with the connector C6 in an opposite-plug manner through the connector C7, and the electric equipment VEE of the whole automobile is connected with the connector C8 in an opposite-plug manner through the connector C9.
The power battery system and the fuel battery system are directly connected in parallel through connectors C1, C2, C3 and C4, wherein the connectors C1 and C2 are connected in a butt-plug manner, and the connectors C3 and C4 are connected in a butt-plug manner.
Referring to fig. 2, three controllers of vcu, BMS, FCU are simultaneously hung on the same CAN bus.
In another embodiment of the invention, the hydrogen fuel cell vehicle power system supporting emergency rescue further comprises an emergency charge analog switch, wherein the emergency charge analog switch is installed in the cab and connected with the VCU.
The invention also provides a control method applied to the hydrogen fuel cell vehicle power system supporting emergency rescue, comprising an external power supply charging control method and an automatic charging control method of the whole vehicle.
Referring to fig. 3, fig. 3 is an external emergency charging flowchart, and the control flow of the external power charging control method is as follows:
s11, completing connection work of an external charging device through an emergency charging port C5;
s12, ON-gear piezoelectric power is applied to the whole vehicle, and the BMS attracts the relay K1;
s13, setting charging voltage and current of an external charging device, and starting the external charging device;
and S14, when the SOC of the battery is more than 50%, closing the external charging device to complete emergency charging.
The battery B1 has a self-protection function, and when serious faults occur, the BMS actively turns off the emergency charging relay K1 to finish charging.
Referring to fig. 4, fig. 4 is a flow of a self-charging control of a fuel cell system, and the flow of the self-charging control of the whole vehicle is as follows:
s21, completing connection work of an external charging device through an emergency charging port C5;
s22, ON-gear piezoelectric power is applied to the whole vehicle, and the BMS attracts the relay K1;
s23, setting charging voltage and current of an external charging device, and starting the external charging device;
s24, receiving an emergency charging mode switch signal generated by triggering an emergency charging mode switch;
s25, the VCU receives the emergency charging mode switch signal, the whole vehicle enters an emergency charging mode, and the VCU enables the FCU and sets power requirements;
s26, the FCU controls the relays K5 and K6 to be attracted, enables the boost voltage converter and enables the fuel cell system to start generating electricity;
s27, externally connecting a charging device, completing emergency charging, and independently charging the battery B1 by the fuel cell;
and S28, when the VCU detects that the single power battery SOC is more than or equal to 50%, the VCU controls the FCU to enter a power-down flow, the whole vehicle is powered down, and charging is finished.
The system has a self-protection function, when serious faults occur, the VCU controls the fuel cell FCU to enter a power-down flow through a message, the whole vehicle is powered down, and charging is finished.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (7)
1. The hydrogen fuel cell vehicle power system supporting emergency rescue is characterized by comprising a fuel cell system, a power cell system, a whole vehicle distribution box and electric equipment, wherein the electric equipment comprises a motor controller MCU and whole vehicle electric equipment VEE;
the power battery system comprises a battery B1, a battery pre-charging loop, a quick charging relay K1, a connector C1, an emergency charging port C5, a battery management system BMS and a battery main negative relay K4, wherein the battery pre-charging loop comprises a main positive relay K2, a pre-charging relay K3 and a pre-charging resistor R1, the pre-charging relay K3 and the pre-charging resistor R1 are connected in series and then connected with the main positive relay K2 in parallel, the parallel connection of the pre-charging resistor R1 is connected with the positive electrode of the connector C1, the parallel connection of the pre-charging relay K3 is connected with the positive electrode of the battery B1, the negative electrode of the connector C1 is connected with one end of the battery main negative relay K4, and the other end of the battery main negative relay K4 is connected with the negative electrode of the battery B1; meanwhile, the anode of the battery B1 is connected with the anode of an external emergency charging port C5 after being connected with an external emergency charging relay K1, and the cathode of the external emergency charging port C5 is directly connected with the cathode of the battery B1; k1, K2, K3 and K4 are all connected and controlled by the BMS;
the fuel cell system comprises a fuel cell pile FCES, a boost voltage converter and a positive electrode connector C3, wherein the fuel cell pile FCES and the boost voltage converter are respectively connected through a positive electrode relay K5 and a negative electrode relay K6, the positive electrode and the negative electrode of the positive electrode connector C3 at the output end of the boost voltage converter are connected with the negative electrode of the C3, and the relays K5 and K6 are connected and controlled by a fuel cell management system FCU;
the whole-vehicle distribution box comprises a connector C2, a connector C4, a connector C6, a connector C8, a motor controller MCU pre-charging loop, a positive relay K9 of a whole-vehicle electric device VEE and a whole-vehicle main negative relay K10, wherein the motor controller MCU pre-charging loop comprises a main positive relay K7, a pre-charging relay K8 and a pre-charging resistor R2; the positive pole of the connector C2 is divided into two branches, the first branch is connected with the positive pole of the connector C4, the second branch is respectively connected with one end of the main positive relay K7 and one end of the pre-charging relay K8, the other end of the pre-charging relay K8 is connected with the other end of one end of the main positive relay K7, and after the pre-charging resistor R2 is connected in series, the positive pole of the connector C6 is simultaneously connected with one end of the positive relay K9, and the other end of the relay K9 is connected with the negative pole of the connector C8; the negative pole of the connector C2 is output and is also divided into two branches, the first branch is connected with the negative pole of the connector C4, the first branch is connected with one end of the main negative relay K10 of the whole vehicle, and the other end of the K10 is respectively connected with the negative poles of the connector C6 and the connector C8; the relays K7, K8, K9 and K10 are all connected and controlled by the vehicle control unit VCU;
the electric equipment further comprises a connector C7 and a connector C9, the motor controller MCU is connected with the connector C6 in a butt-joint way through the connector C7, and the electric equipment VEE of the whole car is connected with the connector C8 in a butt-joint way through the connector C9;
the power battery system and the fuel battery system are directly connected in parallel through connectors C1, C2, C3 and C4, wherein the C1 and the C2 are connected in a butt-plug manner, and the C3 and the C4 are connected in a butt-plug manner;
VCU, BMS, FCU three controllers are simultaneously hung on the same CAN bus;
the battery management system BMS is a master-slave integrated machine.
2. The emergency rescue supported hydrogen fuel cell vehicle power system of claim 1, further comprising an emergency charge analog switch mounted in the cab and connected to the VCU.
3. The hydrogen fuel cell vehicle power system supporting emergency rescue of claim 1, wherein the external charging port C5 is a standard external charging port.
4. A control method applied to the hydrogen fuel cell vehicle power system supporting emergency rescue according to any one of claims 1 to 3, characterized by comprising an external power supply charging control method and an automatic vehicle charging control method;
the control flow of the external power supply charging control method is as follows:
s11, completing connection work of an external charging device through an emergency charging port C5;
s12, ON-gear piezoelectric power is applied to the whole vehicle, and the BMS attracts the relay K1;
s13, setting charging voltage and current of an external charging device, and starting the external charging device;
s14, when the SOC of the battery is more than k%, closing the external charging device to finish emergency charging, wherein k is E (10, 100);
the automatic charging control method of the whole vehicle starts a fuel cell system by using an external power supply, and then charges a power battery by using a fuel cell, wherein the flow of the automatic charging control method of the whole vehicle is as follows:
s21, completing connection work of an external charging device through an emergency charging port C5;
s22, ON-gear piezoelectric power is applied to the whole vehicle, and the BMS attracts the relay K1;
s23, setting charging voltage and current of an external charging device, and starting the external charging device;
s24, receiving an emergency charging mode switch signal generated by triggering an emergency charging mode switch;
s25, the VCU receives the emergency charging mode switch signal, the whole vehicle enters an emergency charging mode, and the VCU enables the FCU and sets power requirements;
s26, the FCU controls the relays K5 and K6 to be attracted, enables the boost voltage converter and enables the fuel cell system to start generating electricity;
s27, externally connecting a charging device, completing emergency charging, and independently charging the battery B1 by the fuel cell;
s28, when the VCU detects that the single power battery SOC is more than or equal to n%, the VCU controls the FCU to enter a power-down flow, the whole vehicle is powered down, and charging is finished; k is E (10, 100).
5. The control method according to claim 4, wherein the battery B1 has a self-protection function in the control flow of the external power charging control method, and the BMS actively turns off the emergency charging relay K1 to end the charging when a serious failure occurs.
6. The control method according to claim 4, wherein in the flow of the automatic charging control method of the whole vehicle, the hydrogen fuel cell vehicle power system supporting emergency rescue has a self-protection function, and when a serious fault occurs, the VCU controls the fuel cell FCU to enter a power-down flow through a message, and the whole vehicle is powered down to stop charging.
7. The control method according to claim 4, characterized in that k=n=50.
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