CN114013282A

CN114013282A - Whole-vehicle high-voltage power-on and power-off control method and control equipment of hydrogen fuel cell vehicle

Info

Publication number: CN114013282A
Application number: CN202111357987.9A
Authority: CN
Inventors: 刘可成; 刘德华
Original assignee: Small Hydrogen Automobile Shanghai Co ltd
Current assignee: Small Hydrogen Automobile Shanghai Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-02-08
Anticipated expiration: 2041-11-16

Abstract

The application discloses a whole vehicle power-on and power-off control method and control equipment of a hydrogen fuel cell vehicle, wherein the method comprises the following steps: in the first sub-power-on stage, a main negative relay, a pre-charging relay and a main positive relay in the BDU circuit are respectively controlled through a BMS; in the second electronic power-on stage, enabling the DCDC/MCU, and respectively controlling a PTC relay, an external charging relay and a heating relay in the BDU circuit through the BMS; in the power-off stage, the high-voltage equipment and the MCU are respectively controlled, and a total negative/positive relay in the BDU circuit is respectively controlled through the BMS; after the control state is changed every time, the relay state in the BDU circuit and the voltage of the whole automobile system of the hydrogen fuel cell automobile are monitored, corresponding detection and all-in-one control can be performed on the high-voltage power supply and the power off of the whole automobile of the hydrogen fuel cell automobile, the problem of influencing the personal safety of a user can be avoided, and the safety performance of the whole automobile can be improved.

Description

Whole-vehicle high-voltage power-on and power-off control method and control equipment of hydrogen fuel cell vehicle

Technical Field

The application relates to the technical field of new energy automobiles, in particular to a whole automobile high-voltage power-on and power-off control method and control equipment of a hydrogen fuel cell automobile.

Background

With the development of new energy automobiles, hydrogen fuel cell automobiles have gradually entered into the lives of people because the hydrogen fuel cell automobiles do not use traditional fossil energy and do not cause pollution to the environment.

At present, for the whole vehicle power-on and power-off control of a hydrogen fuel cell vehicle, a whole vehicle power-on and power-off control method of a traditional vehicle (such as a fuel vehicle) is adopted, namely, the power-on and power-off are controlled by simply judging the rotation position of a starting key, for example, when the vehicle is in a start gear, the whole vehicle judges that the power-on is successful, and an engine is started at the same time.

Therefore, in the conventional method for controlling the power on and power off of the whole hydrogen fuel cell automobile, the corresponding detection and control on the high-voltage power on and power off of the whole automobile are not performed, the problem that the personal safety of a user is influenced due to the fact that a high-voltage system in the hydrogen fuel cell automobile is damaged may exist, and the safety performance of the whole automobile is poor.

Disclosure of Invention

Based on the above, the application provides a whole vehicle power-on and power-off control method and control equipment for a hydrogen fuel cell vehicle, which are used for correspondingly detecting and controlling the whole vehicle high-voltage power-on and power-off, so that the problem that the personal safety of a user is influenced due to the damage of a high-voltage system in the hydrogen fuel cell vehicle can be avoided, and the safety performance of the whole vehicle can be improved.

The whole vehicle control system should ensure the reasonable matching of the whole vehicle power system and the energy supply system, and the whole vehicle control strategy continuously optimizes the control under the condition of meeting the requirements of the whole vehicle power performance and safety, thereby improving the vehicle operation economy.

In a first aspect, an embodiment of the present application provides a method for controlling power on and power off of a hydrogen fuel cell vehicle, where the method for controlling power on and power off of the hydrogen fuel cell vehicle includes: the power-on stage comprises a first sub power-on stage and a second sub power-on stage, wherein the first sub power-on stage is a power-on stage of a main circuit of the whole hydrogen fuel cell automobile, and the second sub power-on stage is an enabling and load power-on stage of the hydrogen fuel cell automobile; the method comprises the following steps:

in the first sub-power-on stage, sending a corresponding first power-on command to a BMS (battery management system), so that the BMS respectively controls a main negative relay, a pre-charging relay and a main positive relay in a BDU (brain-based distribution unit) circuit after receiving the corresponding first power-on command, and monitors the state of the relay in the BDU circuit and the voltage of a whole vehicle system of the hydrogen fuel cell vehicle;

in the second electronic electrifying stage, the relay state in the BDU circuit, the voltage of the whole vehicle system of the hydrogen fuel cell vehicle and the fault state of the whole vehicle are monitored, and MCU/DCDC is enabled; sending a corresponding second power-on command to the BMS, so that the BMS respectively controls a PTC relay and a heating relay in the BDU circuit after receiving the corresponding second power-on command;

when the failure of the whole vehicle is detected to be 3-level or the driver operates the key to power off, entering a power off stage; in the first stage of the power-off stage, respectively controlling a high-voltage device and an MCU, sending an enabling stop command, closing the high-voltage device, unloading the MCU, the DCDC and the AC, monitoring the current in the BDU circuit, and entering the second stage of the power-off stage when the current is smaller than a preset value; in the second stage, sending a corresponding power-down command to a BMS (battery management system), so that after the BMS receives the corresponding power-down command, the BMS respectively controls the main negative relay and the main negative relay in the BDU circuit and monitors the relay state in the BDU circuit and the voltage of the whole hydrogen fuel cell automobile; the high voltage device includes the DCDC, the AC, and the PTC.

In one possible design, the respective first power-on command includes: a first relay command, a second relay command, a third relay, and a fourth relay command;

in the first sub-power-on phase, sending a corresponding first power-on command to a BMS so that the BMS receives the corresponding first power-on command and then respectively controls a main negative relay, a pre-charge relay and a main positive relay in a BDU circuit to monitor a relay state in the BDU circuit and a vehicle system voltage of the hydrogen fuel cell vehicle, comprising:

sending the first relay command to the BMS so that the BMS controls the main and negative relays to be closed after receiving the first relay command;

monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the main and negative relays through the BMS;

receiving first state information of the main negative relay fed back by the BMS;

if the first state information indicates that the main relay and the negative relay are in a conducting state, sending a second relay command to the BMS, so that the BMS controls the pre-charging relay to be closed for pre-charging after receiving the second relay command;

monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the pre-charging relay through the BMS;

receiving second state information of the pre-charging relay fed back by the BMS;

if the second state information indicates that the pre-charging relay is in a conducting state, judging whether pre-charging is finished or not through the rear end voltage of the relay;

if the fact that the pre-charging is completed is determined, sending a third relay command to the BMS, so that the BMS controls the main positive relay to be closed after receiving the third relay command;

monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the main positive relay through the BMS;

receiving third state information of the main positive relay fed back by the BMS;

if the third state information indicates that the main positive relay is in a conducting state, a relay fourth relay command is sent to the BMS, so that the BMS controls the pre-charging relay to be switched off after receiving the fourth relay command;

and monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the pre-charging relay through the BMS.

In one possible design, in the second sub-power-up phase, enabling MCU/DCDC includes:

receiving fourth state information of the pre-charging relay fed back by the BMS;

if the fourth state information indicates that the pre-charging relay is in a disconnected state, determining that the main circuit of the hydrogen fuel cell automobile is powered on, and sending an enabling command to the MCU/the DCDC to enable the MCU/the DCDC; and monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of a relay in the BDU circuit through the BMS.

In one possible design, the method further includes:

and if the fact that pre-charging is not completed or overtime is determined, or if the fact that the main circuit of the hydrogen fuel cell automobile is not powered on is determined, entering the power-off stage after a first preset time period.

In one possible design, the respective second power-on command includes: a fifth relay command and a sixth relay command;

sending a corresponding second power-on command to the BMS so that the BMS respectively controls a PTC relay, an external charging relay and a heating relay in the BDU circuit after receiving the corresponding second power-on command, and monitors the state of the relay in the BDU circuit and the voltage of the whole hydrogen fuel cell automobile system, and the method comprises the following steps:

if first indication information which is sent by the ICM and used for indicating that the PTC switch is in the opening state is received, sending a fifth relay command to the BMS so that the BMS controls the PTC relay to be closed after receiving the fifth relay command; monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the PTC relay through the BMS; and/or the presence of a gas in the gas,

if the battery heating requirement is detected and confirmed, sending a sixth relay command to the BMS so that the BMS controls the heating relay to be closed after receiving the sixth relay command; and monitoring the voltage of the whole hydrogen fuel cell automobile system, and monitoring the state of the heating relay through the BMS.

In one possible design, controlling a high voltage device and an MCU separately, sending an enable stop command, shutting down the high voltage device, and unloading the MCU, the DCDC, and the AC includes:

respectively sending the enabling closing command to the MCU, the DCDC, the AC and the PTC, unloading component loads corresponding to the MCU, the DCDC, the AC and the PTC, and closing the working state of each component of the hydrogen fuel cell automobile;

the corresponding power down command comprises: a seventh relay command and an eighth relay command; send corresponding power down command to BMS, so that after BMS received corresponding power down command, respectively right main negative relay the total negative relay in the BDU circuit controls, monitors relay state in the BDU circuit with the whole car system voltage of hydrogen fuel cell car includes:

sending a seventh relay command to the BMS so that the BMS controls the main positive relay to be switched off after receiving the seventh relay command;

receiving fifth state information of the main positive relay fed back by the BMS;

if the fifth state information indicates that the main positive relay is in a disconnected state, an eighth relay command is sent to the BMS, so that the BMS controls the main negative relay to be disconnected after receiving the eighth relay command;

and monitoring the voltage of the whole hydrogen fuel cell automobile system, and monitoring the state of the main and negative relays through the BMS.

In one possible design, controlling a high voltage device to monitor current in the BDU circuit includes: sending control information to the high-voltage equipment, controlling the high-voltage equipment to be closed, and monitoring the current in the BDU circuit through the BMS;

controlling the MCU, monitoring the current in the BDU circuit, including:

receiving sixth state information of the main negative relay fed back by the BMS; if the sixth state information indicates that the main and negative relays are in a disconnected state and are not high-voltage, after a second preset time, a quick discharge command is sent to the MCU to control the MCU to start quick discharge, and the BMS monitors the current in the BDU circuit;

and if the actual voltage of the motor is smaller than the preset voltage value, after a third preset time, sending a discharge stopping command to the MCU, controlling the MCU to close the quick discharge, and monitoring the current in the BDU circuit through the BMS.

In one possible design, before sending the corresponding first power-on command to the BMS in the first sub-power-on phase, the method further includes:

detecting and confirming that the hydrogen fuel cell automobile meets the power-on condition;

wherein the power-up condition comprises:

the key is currently in the START gear;

the VCU, the BMS, the MCU, the HMS and the FCU respectively pass self-checking when the key is in an ON gear.

In one possible design, before sending the corresponding power down command to the BMS, the method further comprises:

detecting and confirming that the hydrogen fuel cell automobile meets the power-off condition;

wherein the power down condition comprises:

the key is currently in the OFF gear;

and receiving request information which is respectively sent by the BMS and the HMS and used for requesting the whole vehicle to cut off the high voltage.

In a second aspect, an embodiment of the present application provides a control device for controlling power on and power off of a hydrogen fuel cell vehicle, where the power on and power off of the hydrogen fuel cell vehicle includes: the power-on stage comprises a first sub power-on stage and a second sub power-on stage, wherein the first sub power-on stage is a power-on stage of a main circuit of the whole hydrogen fuel cell automobile, and the second sub power-on stage is an enabling and load power-on stage of the hydrogen fuel cell automobile; the control apparatus includes:

the processing unit is used for sending a corresponding first power-on command to the BMS in the first electronic power-on stage so that the BMS respectively controls a main negative relay, a pre-charging relay and a main positive relay in the BDU circuit after receiving the corresponding first power-on command;

the monitoring unit is used for monitoring the state of a relay in the BDU circuit and the voltage of a whole vehicle system of the hydrogen fuel cell vehicle during the first electronic electrifying phase;

the monitoring unit is also used for monitoring the state of a relay in the BDU circuit and the voltage of a whole vehicle system and the fault state of the whole vehicle of the hydrogen fuel cell vehicle in the second electronic electrifying stage;

the processing unit is further configured to enable the MCU/DCDC during the second electronic power-on phase; sending a corresponding second power-on command to the BMS, so that the BMS respectively controls a PTC relay and a heating relay in the BDU circuit after receiving the corresponding second power-on command;

the processing unit is also used for entering a power-off stage when the fault of the whole vehicle is detected to be 3-level or the power-off state of a key operated by a driver is detected; in the first stage of the power-off stage, respectively controlling a high-voltage device and an MCU, sending an enabling stop command, closing the high-voltage device, and unloading the MCU, the DCDC and the AC; the high voltage device comprises the DCDC, the AC, the PTC;

the monitoring unit is further used for monitoring the current in the BDU circuit during the first phase, and determining to enter the second phase of the power-down phase after the current is smaller than a preset value;

the processing unit is further configured to send a corresponding power-down command to a BMS in the second stage, so that the BMS controls the main negative relay and the total negative relay in the BDU circuit after receiving the corresponding power-down command;

and the monitoring unit is also used for monitoring the state of a relay in the BDU circuit and the voltage of the whole hydrogen fuel cell automobile during the second phase.

In one possible design, the respective first power-on command includes: a first relay command, a second relay command, a third relay, and a fourth relay command; the processing unit is specifically configured to: sending the first relay command to the BMS so that the BMS controls the main and negative relays to be closed after receiving the first relay command;

the monitoring unit is specifically configured to: monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the main and negative relays through the BMS;

the processing unit is specifically configured to: receiving first state information of the main negative relay fed back by the BMS; if the first state information indicates that the main relay and the negative relay are in a conducting state, sending a second relay command to the BMS, so that the BMS controls the pre-charging relay to be closed for pre-charging after receiving the second relay command;

the monitoring unit is specifically configured to: monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the pre-charging relay through the BMS;

the processing unit is specifically configured to: receiving second state information of the pre-charging relay fed back by the BMS; if the second state information indicates that the pre-charging relay is in a conducting state, judging whether pre-charging is finished or not through the rear end voltage of the relay; if the fact that the pre-charging is completed is determined, sending a third relay command to the BMS, so that the BMS controls the main positive relay to be closed after receiving the third relay command;

the monitoring unit is specifically configured to: monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the main positive relay through the BMS;

the processing unit is specifically configured to: receiving third state information of the main positive relay fed back by the BMS; if the third state information indicates that the main positive relay is in a conducting state, a relay fourth relay command is sent to the BMS, so that the BMS controls the pre-charging relay to be switched off after receiving the fourth relay command;

the monitoring unit is specifically configured to: and monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the pre-charging relay through the BMS.

In one possible design, the processing unit is specifically configured to: receiving fourth state information of the pre-charging relay fed back by the BMS; if the fourth state information indicates that the pre-charging relay is in a disconnected state, determining that the main circuit of the hydrogen fuel cell automobile is powered on, and sending an enabling command to the MCU/the DCDC to enable the MCU/the DCDC;

the monitoring unit is specifically configured to: and monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of a relay in the BDU circuit through the BMS.

In one possible design, the processing unit is further configured to: and if the fact that pre-charging is not completed or overtime is determined, or if the fact that the main circuit of the hydrogen fuel cell automobile is not powered on is determined, entering the power-off stage after a first preset time period.

In one possible design, the respective second power-on command includes: a fifth relay command and a sixth relay command; the processing unit is specifically configured to:

if first indication information which is sent by the ICM and used for indicating that the PTC switch is in the opening state is received, sending a fifth relay command to the BMS so that the BMS controls the PTC relay to be closed after receiving the fifth relay command;

the monitoring unit is specifically configured to: monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the PTC relay through the BMS;

and/or the processing unit is specifically configured to: if the battery heating requirement is detected and confirmed, sending a sixth relay command to the BMS so that the BMS controls the heating relay to be closed after receiving the sixth relay command;

the monitoring unit is specifically configured to: and monitoring the voltage of the whole hydrogen fuel cell automobile system, and monitoring the state of the heating relay through the BMS.

In one possible design, the processing unit is specifically configured to: respectively sending the enabling closing command to the MCU, the DCDC, the AC and the PTC, unloading component loads corresponding to the MCU, the DCDC, the AC and the PTC, and closing the working state of each component of the hydrogen fuel cell automobile;

the corresponding power down command comprises: a seventh relay command and an eighth relay command; the processing unit is specifically configured to:

the monitoring unit is specifically configured to: receiving fifth state information of the main positive relay fed back by the BMS; if the fifth state information indicates that the main positive relay is in a disconnected state, an eighth relay command is sent to the BMS, so that the BMS controls the main negative relay to be disconnected after receiving the eighth relay command;

the monitoring unit is specifically configured to: and monitoring the voltage of the whole hydrogen fuel cell automobile system, and monitoring the state of the main and negative relays through the BMS.

In one possible design, the processing unit is specifically configured to: sending control information to the high-voltage equipment to control the high-voltage equipment to be closed;

the monitoring unit is specifically configured to: monitoring, by the BMS, a current within the BDU circuit;

the processing unit is specifically configured to: receiving sixth state information of the main negative relay fed back by the BMS; if the sixth state information indicates that the main and negative relays are in a disconnected state and are not high-voltage, after a second preset time, a quick discharge command is sent to the MCU to control the MCU to start quick discharge;

the processing unit is specifically configured to: if the actual voltage of the motor is smaller than the preset voltage value, after a third preset time period, sending a discharge stopping command to the MCU, and controlling the MCU to close the rapid discharge;

the monitoring unit is specifically configured to: monitoring, by the BMS, a current within the BDU circuit.

In one possible design, the processing unit is further configured to:

wherein the power-up condition comprises:

the key is currently in the START gear;

In one possible design, the processing unit is further configured to: detecting and confirming that the hydrogen fuel cell automobile meets the power-off condition;

wherein the power down condition comprises:

the key is currently in the OFF gear;

and the processing unit receives request information which is respectively sent by the BMS and the HMS and used for requesting the whole vehicle to cut off the high voltage.

In a third aspect, an embodiment of the present application provides a control apparatus, including: at least one memory and at least one processor;

the at least one memory is for storing one or more programs;

the one or more programs, when executed by the at least one processor, implement the method as recited in any one of the possible designs of the first aspect above.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing at least one program; the at least one program, when executed by a processor, performs the method of any one of the possible designs of the first aspect.

The beneficial effect of this application is as follows:

in the technical scheme provided by the application, in a first sub-power-on stage, a corresponding first power-on command is sent to the BMS, so that after the BMS receives the corresponding first power-on command, a main negative relay, a pre-charging relay and a main positive relay in a BDU circuit are respectively controlled, and the state of the relay in the BDU circuit and the voltage of a whole vehicle system of the hydrogen fuel cell vehicle are monitored; furthermore, in a second electronic electrifying stage, the relay state in the BDU circuit, the voltage of the whole vehicle system of the hydrogen fuel cell vehicle and the fault state of the whole vehicle are monitored, and the MCU/DCDC is enabled; sending a corresponding second power-on command to the BMS so that the BMS respectively controls a PTC relay and a heating relay in the BDU circuit after receiving the corresponding second power-on command; further, when the vehicle fault is detected to be 3-level or the driver operates the key to power off, the power off stage is started; in the first stage of the power-off stage, the high-voltage equipment and the MCU are respectively controlled, an enabling stop command is sent, the high-voltage equipment is closed, the MCU, the DCDC and the AC are unloaded, the current in the BDU circuit is monitored, and when the current is smaller than a preset value, the second stage of the power-off stage is started; in the second stage, a corresponding power-down command is sent to the BMS, so that after the BMS receives the corresponding power-down command, the main negative relay and the total negative relay in the BDU circuit are respectively controlled, and the relay state in the BDU circuit and the voltage of the whole vehicle system of the hydrogen fuel cell vehicle are monitored; the high voltage equipment comprises DCDC, AC and PTC. Through the mode, can go on corresponding detection and the control of unifying more to the whole car high pressure electricity of hydrogen fuel cell car about, thereby can detect whether there is the problem of gluing in the relay of the electric control circuit about the whole car high pressure, can also carry out the insulation detection to the hydrogen fuel cell car, etc., thereby avoid appearing damaging the high-voltage system in the hydrogen fuel cell car and lead to the problem that influences user's personal safety, and is further, can improve the whole car security performance of hydrogen fuel cell car.

Drawings

Fig. 1 is a schematic flow chart of a method for controlling power on and power off of a hydrogen fuel cell vehicle according to an embodiment of the present disclosure;

fig. 2 is a schematic process diagram of a VCU executing step S101 according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of a whole vehicle power-on and power-off control circuit of a hydrogen fuel cell vehicle according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a control device according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a control device according to an embodiment of the present application.

Detailed Description

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like, referred to or may be referred to in this specification, are defined relative to their configuration, and are relative concepts. Therefore, it may be changed according to different positions and different use states. Therefore, these and other directional terms should not be construed as limiting terms.

The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of implementations consistent with certain aspects of the present disclosure.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Unless otherwise stated, the embodiments of the present application refer to the ordinal numbers "first" to "ninth" for distinguishing a plurality of objects, and do not limit the sequence, timing, priority, or importance of the plurality of objects.

The following explains some of the english abbreviations referred to in the examples of the present application:

the VCU may be a Vehicle Control Unit (Vehicle Control Unit).

The BMS may be a Battery Management controller (Battery Management System).

And the MCU can be a Motor Control Unit (Motor Control Unit).

The ICM may be an Ignition Control Module (Ignition Control Module).

The HMS may be an ignition control module (ignition System).

The FCU may be a fuel cell automotive controller.

The BDU may be a Battery pack disconnection Unit (Battery Disconnect Unit).

DC, which may be a direct current controller.

And the AC can be an air conditioner refrigerator or a heater.

The MDS can be a maintenance switch.

In order to facilitate understanding of the technical solutions provided by the embodiments of the present application, the technical solutions of the present application are described in detail below with reference to the accompanying drawings.

The whole vehicle power-on and power-off control logic of the hydrogen fuel cell vehicle related in the embodiment of the application can comprise two stages: a power-up phase and a power-down phase. In a specific implementation procedure, the power-up phase may include a first sub power-up phase and a second sub power-up phase. The first sub-power-up stage can be a main circuit power-up stage of the hydrogen fuel cell automobile. The second sub-power-up phase may be an enable and load power-up phase of a hydrogen fuel cell vehicle.

Fig. 1 is a schematic flow chart illustrating a method for controlling power on and power off of a hydrogen fuel cell vehicle according to an embodiment of the present disclosure. In this case, the main execution body of the method flow shown in fig. 1 is VCU as an example. As shown in fig. 1, the method flow may include the following steps:

s101, in a first sub-electrifying stage, sending a corresponding first electrifying command to the BMS so that the BMS respectively controls a main negative relay, a pre-charging relay and a main positive relay in the BDU circuit after receiving the corresponding first electrifying command, and monitors the relay state in the BDU circuit and the voltage of the whole vehicle system of the hydrogen fuel cell vehicle.

In some embodiments, when the key is in the ON position, the VCU, BMS, MCU, HMS, FCU may perform a self-check to determine whether there is a fault. If the VCU, BMS, MCU, HMS, FCU pass the self-check respectively, and the key is currently in the START gear, the VCU may determine that the hydrogen fuel cell vehicle satisfies the power-on condition, and may START to execute step S101.

In some embodiments, the corresponding first power-on command may include: a first relay command, a second relay command, a third relay, and a fourth relay command. As shown in fig. 1 to 3, in the process of executing step S101, the VCU may specifically execute the following steps:

s201, sending a first relay command to the BMS so that the BMS controls the main and negative relays to be closed after receiving the first relay command.

In some embodiments, the VCU may send a first relay command to the BMS for controlling the main negative relay (Realy 8 shown in fig. 3) to close after determining that the hydrogen fuel cell vehicle satisfies the power-on condition. Correspondingly, after the BMS receives the first relay command, the BMS controls the main and negative relays to be closed.

S202, monitoring the voltage of the whole hydrogen fuel cell automobile system, and monitoring the states of the main relay and the negative relay through a BMS.

In some embodiments, the VCU may monitor the voltage of the entire vehicle system of the fuel cell vehicle during the closing of the main and negative relays, so as to perform the detection of the insulation of the entire vehicle, for example, detect whether the high voltage system of the fuel cell vehicle has the problem of electric leakage, and avoid the problem that the entire vehicle has electric leakage to damage the high voltage system of the hydrogen fuel cell vehicle, further, prevent the problem of influencing the personal safety of the user, and improve the safety performance of the entire vehicle of the hydrogen fuel cell vehicle.

In some embodiments, the VCU can also monitor the state of the main negative relay through the BMS during the closing of the main negative relay, so that the adhesion detection of the relay can be performed, if the adhesion problem of the main negative relay exists, the problem that the high-voltage system in the hydrogen fuel cell automobile is damaged due to the adhesion of the main negative relay can be avoided, and further, the problem that the personal safety of a user is influenced can be prevented, and the safety performance of the whole hydrogen fuel cell automobile can be improved.

And S203, receiving first state information of the main negative relay fed back by the BMS.

In some embodiments, the VCU may receive first state information of the main negative relay fed back by the BMS, so that whether the main negative relay has a sticking problem may be determined based on the first state information.

And S204, if the first state information indicates that the main and negative relays are in a conducting state, sending a second relay command to the BMS so that the BMS controls the pre-charging relay to be closed to perform pre-charging after receiving the second relay command.

In some embodiments, if the first status information indicates that the main negative Relay is in a conducting state, the VCU may determine that there is no sticking problem with the main negative Relay, and at this time, may send a second Relay command to the BMS for controlling the pre-charge Relay to close (Relay 2 shown in fig. 3). Correspondingly, after the BMS receives the second relay command, the pre-charging relay can be controlled to be closed, and at the moment, the MCU can be pre-charged.

S205, monitoring the voltage of the whole hydrogen fuel cell automobile system, and monitoring the state of the pre-charging relay through a BMS.

In some embodiments, the VCU may monitor the entire vehicle system voltage of the hydrogen fuel cell vehicle during the closing of the pre-charge relay, which may be the same or similar to the purpose of monitoring the entire vehicle system voltage of the fuel cell vehicle during the closing of the main negative relay in step 202, and is not described herein again.

In some embodiments, the VCU can also monitor the state of the pre-charging relay through the BMS during the closing of the pre-charging relay, if the pre-charging relay is detected to have the adhesion problem, the problem that the high-voltage system in the hydrogen fuel cell automobile is damaged due to the adhesion of the pre-charging relay can be avoided, further, the problem of influencing the personal safety of a user can be prevented, and the safety performance of the whole hydrogen fuel cell automobile can be improved.

And S206, receiving second state information of the pre-charging relay fed back by the BMS.

In some embodiments, the VCU may receive second state information of the pre-charge relay fed back by the BMS, so that whether the pre-charge relay has a sticking problem may be determined based on the second state information.

And S207, if the second state information indicates that the pre-charging relay is in a conducting state, judging whether pre-charging is finished or not overtime through the rear end voltage of the relay. If it is determined that the precharging is completed or the timeout is not completed, step S208 is performed, or if the MCU does not complete the precharging or the timeout, step S213 is performed.

In some embodiments, the VCU may determine that the precharging is completed through the precharging information fed back by the MCU. For example, as shown in fig. 3, if the precharge information indicates that the actual voltage of the MOTOR (MOTOR) in the MCU control circuit is greater than or equal to 90% of the voltage of the BMS, the VCU may determine that the precharge is completed, and at this time, step S208 may be performed. Alternatively, if the precharge information indicates that the actual voltage of the motor in the MCU control circuit is less than 90% of the voltage of the BMS, the VCU may determine that the precharge is not completed, and at this time, step S213 may be performed.

In the embodiment of the application, the motor in the MCU control circuit can be further ensured to normally work by judging and finishing the pre-charging.

And S208, sending a third relay command to the BMS so that the BMS controls the main positive relay to be closed after receiving the third relay command.

In some embodiments, the VCU may send a third Relay command to the BMS for controlling the main positive Relay to close (Relay 1 shown in fig. 3). Accordingly, the BMS can control the main positive relay to be closed after receiving the third relay command.

And S209, monitoring the voltage of the whole hydrogen fuel cell automobile system, and monitoring the state of the main positive relay through a BMS.

In some embodiments, the VCU may monitor the entire vehicle system voltage of the hydrogen fuel cell vehicle during the closing of the main positive relay, which may be the same or similar to the purpose of monitoring the entire vehicle system voltage of the fuel cell vehicle during the closing of the main negative relay in step 202, and is not described herein again.

In some embodiments, the VCU can also monitor the state of the main positive relay through the BMS during the closing of the main positive relay, if detect whether the main positive relay has the problem of adhesion, can avoid the problem of damaging the high-voltage system in the hydrogen fuel cell automobile due to the adhesion of the main positive relay, and further, can prevent the problem of influencing the personal safety of the user, and can improve the safety performance of the whole hydrogen fuel cell automobile.

And S210, receiving third state information of the main positive relay fed back by the BMS.

In some embodiments, the VCU may receive third status information of the main positive relay fed back by the BMS, so that whether the main positive relay has a sticking problem may be determined based on the third status information.

And S211, if the third state information indicates that the main positive relay is in a conducting state, sending a relay fourth relay command to the BMS, so that the BMS controls the pre-charging relay to be switched off after receiving the fourth relay command.

In some embodiments, if the third status information indicates that the main positive relay is in the on state, the VCU may determine that the main positive relay does not have the sticking problem, and at this time, may send a fourth relay command to the BMS for controlling the pre-charge relay to turn off. Accordingly, the BMS may control the pre-charge relay to turn off after receiving the fourth relay command.

And S212, monitoring the voltage of the whole hydrogen fuel cell automobile system, and monitoring the state of the pre-charging relay through a BMS.

In some embodiments, the VCU may monitor the entire vehicle system voltage of the hydrogen fuel cell vehicle during the opening of the pre-charge relay, which may be the same or similar to the purpose of monitoring the entire vehicle system voltage of the fuel cell vehicle during the closing of the main negative relay by the VCU in step 202, and is not described herein again.

In some embodiments, the VCU can also monitor the state of the pre-charging relay through the BMS during the disconnection of the pre-charging relay, if the pre-charging relay is detected to have the adhesion problem, the problem that the high-voltage system in the hydrogen fuel cell vehicle is damaged due to the adhesion of the pre-charging relay can be avoided, further, the problem that the personal safety of a user is influenced can be prevented, and the safety performance of the whole hydrogen fuel cell vehicle can be improved.

And S213, entering a power-off stage after the first preset time period.

In some embodiments, the first preset time period may be set according to actual requirements, for example, may be set to 5 seconds.

In the embodiment of the application, when the pre-charging is not completed or the time is overtime, the high-voltage system of the fuel cell automobile can be protected by entering the power-off stage after the first preset time.

In the embodiment of the application, the relay state in the BDU circuit and the voltage of the whole hydrogen fuel cell automobile system are monitored in the whole hydrogen fuel cell automobile electrifying preparation phase, so that the problem of damaging a high-voltage system in the hydrogen fuel cell automobile can be avoided, further, the problem of influencing the personal safety of a user can be prevented, and the whole hydrogen fuel cell automobile safety performance can be improved.

S102, in a second electronic electrifying stage, monitoring the state of a relay in the BDU circuit, the voltage of a whole vehicle system of the hydrogen fuel cell vehicle and the fault state of the whole vehicle, and enabling the MCU/DCDC; and sending a corresponding second power-on command to the BMS so that the BMS respectively controls the PTC relay and the heating relay in the BDU circuit after receiving the corresponding second power-on command.

In some embodiments, in the second sub-power-on phase, the VCU may receive fourth state information of the pre-charge relay fed back by the BMS, so that whether the pre-charge relay has a sticking problem may be determined based on the fourth state information. If the fourth state information indicates that the pre-charging relay is in the off state, the VCU can determine that the main circuit of the hydrogen fuel cell vehicle is powered on, and at this time, an enable command can be sent to the MCU/DCDC to enable the MCU/DCDC.

In other embodiments, in the second sub-power-on phase, if the high voltage information fed back by the BMS is received and indicates that the BMS is not in the pre-charge state, the VCU may determine that the power-on of the main circuit of the hydrogen fuel cell vehicle is not completed, and may enter the power-off phase after a first preset time period elapses, so that the high voltage system of the fuel cell vehicle may be protected.

In some embodiments, the VCU may monitor the entire vehicle system voltage of the hydrogen fuel cell vehicle during the MCU/DCDC enabling period, which may be the same or similar to the purpose of monitoring the entire vehicle system voltage of the fuel cell vehicle during the main and negative relays are closed in step 202, and will not be described herein again.

In some embodiments, the VCU may also monitor the relay state in the BDU circuit through the BMS during the MCU/DCDC enabling, such as detecting whether the main negative relay and the main positive relay will be adhered during the DCDC enabling, which may avoid the problem of damaging the high voltage system in the hydrogen fuel cell vehicle due to the adhesion of the main negative relay and/or the main positive relay, further, may prevent the problem of affecting the personal safety of the user, and may improve the overall safety performance of the hydrogen fuel cell vehicle.

In some embodiments, the respective second power-on command may include: a fifth relay command and a sixth relay command.

In some embodiments, after the complete vehicle power-on preparation of the hydrogen fuel cell vehicle is completed, the VCU may perform corresponding control according to actual requirements. Such as:

if the VCU receives the first indication from the ICM indicating that the PTC switch is in the on state, the VCU may send a fifth Relay command to the BMS for controlling the PTC Relay (Relay 3 shown in fig. 3) to close. Accordingly, the BMS may control the PTC relay to close after receiving the fifth relay command.

The VCU may monitor the entire vehicle system voltage of the hydrogen fuel cell vehicle during the closing of the PTC relay, and the purpose of the VCU may be the same as or similar to the purpose of monitoring the entire vehicle system voltage of the hydrogen fuel cell vehicle during the closing of the main and negative relays in step 202, which is not described herein again.

Wherein, VCU can also be during PTC relay closure, through the state of BMS monitoring PTC relay, if detect the problem that PTC relay is sticky, can avoid appearing damaging the problem of the high-voltage system in the hydrogen fuel cell car because PTC relay is sticky, and is further, can prevent to appear influencing the problem of user's personal safety, can improve the whole car security performance of hydrogen fuel cell car.

And/or, if the detection confirms that there is a need for battery heating, a sixth Relay command is sent to the BMS for controlling the heating Relay (Relay 5 shown in fig. 3) to close. Accordingly, the BMS may control the heating relay to close after receiving the sixth relay command.

The VCU may monitor the entire vehicle system voltage of the hydrogen fuel cell vehicle during the closing of the heating relay, and the purpose of the VCU may be the same as or similar to the purpose of monitoring the entire vehicle system voltage of the fuel cell vehicle during the closing of the main and negative relays in step 202, which is not described herein again.

Wherein, VCU can also be during heating relay is closed, through the state of BMS monitoring heating relay, if detect the problem that heating relay is sticky, can avoid appearing damaging the problem of the high-voltage system among the hydrogen fuel cell car because heating relay is sticky, and is further, can prevent to appear influencing the problem of user's personal safety, can improve the whole car security performance of hydrogen fuel cell car.

In the embodiment of the present application, during the power-on control of the hydrogen fuel cell vehicle, a control may be performed in combination, and for example, as shown in fig. 3, the PTC, the Charger (Charger), and the like may be controlled individually.

S103, when the vehicle fault is detected to be 3-level or the driver operates the key to power off, entering a power off stage; in the first stage of the power-off stage, the high-voltage equipment and the MCU are respectively controlled, an enabling stop command is sent, the high-voltage equipment is closed, the MCU, the DCDC and the AC are unloaded, the current in the BDU circuit is monitored, and when the current is smaller than a preset value, the second stage of the power-off stage is started; and in the second stage, sending a corresponding power-off command to the BMS so that the BMS respectively controls the main negative relay and the total negative relay in the BDU circuit after receiving the corresponding power-off command, and monitoring the relay state in the BDU circuit and the voltage of the whole hydrogen fuel cell automobile.

In some embodiments, the high voltage devices may include, but are not limited to, DCDC, AC, PTC.

In some embodiments, if the key is currently in the OFF gear and receives the request information for requesting the entire vehicle to cut OFF the high voltage sent by the BMS and the HMS, respectively, the VCU may confirm that the hydrogen fuel cell vehicle satisfies the power-OFF condition, and at this time, may enter the power-OFF phase. Or when the VCU detects that the fault of the whole vehicle is 3 levels or the driver operates the key to power off, the VCU determines that the power off stage can be currently entered.

In some embodiments, after the hydrogen fuel cell vehicle enters the first stage of the power-down stage, the VCU may send an enable shutdown command to the MCU, the DCDC, the AC, and the PTC, respectively, for unloading the loads of the components corresponding to the MCU, the DCDC, the AC, and the PTC, and shutting down the operating states of the components of the hydrogen fuel cell vehicle.

In some embodiments, the respective power down command may include: a seventh relay command and an eighth relay command.

In some embodiments, after the hydrogen fuel cell vehicle enters the second phase of the power down phase, the VCU may send a seventh relay command to the BMS for the main positive relay to open. Accordingly, the BMS may control the main positive relay to turn off after receiving the seventh relay command.

The VCU may monitor the entire vehicle system voltage of the hydrogen fuel cell vehicle during the period when the main positive relay is turned off, and the purpose of the VCU may be the same as or similar to the purpose of monitoring the entire vehicle system voltage of the hydrogen fuel cell vehicle during the period when the main negative relay is turned on in step 202, which is not described herein again.

Wherein, VCU can also be in the main positive relay disconnection period, through the state of the positive relay of BMS monitoring main, if detect the problem that the main positive relay is sticky, can avoid appearing damaging the problem of the high-voltage system in the hydrogen fuel cell car because the main positive relay is sticky, and is further, can prevent to appear influencing the problem of user's personal safety, can improve the whole car security performance of hydrogen fuel cell car.

In some embodiments, the VCU may also receive fifth status information of the main positive relay fed back by the BMS, so that whether the main positive relay has a sticking problem may be determined based on the fifth status information. Wherein, if fifth state information indicates that the main positive relay is in the disconnection state, the VCU can confirm that the main positive relay does not have the problem of adhesion, at this moment, can send ninth relay state to the BMS for control main negative relay disconnection. Accordingly, the BMS can control the main and negative relays to be switched off after receiving the eighth relay command.

The VCU may monitor the entire vehicle system voltage of the hydrogen fuel cell vehicle during the period when the main and negative relays are turned off, and the purpose of the VCU may be the same as or similar to the purpose of monitoring the entire vehicle system voltage of the hydrogen fuel cell vehicle during the period when the main and negative relays are turned on in step 202, which is not described herein again.

Wherein, VCU can also be during the disconnection of main negative relay, through the state of BMS monitoring main positive relay, if detect the problem that main negative relay is sticky, can avoid appearing damaging the problem of the high-voltage system in the hydrogen fuel cell car because main negative relay is sticky, and is further, can prevent to appear influencing the problem of user's personal safety, can improve the whole car security performance of hydrogen fuel cell car.

In some embodiments, in the second phase of the power-down phase, the VCU may further receive sixth status information of the main negative relay fed back by the BMS, so that it may be determined whether the rapid discharge needs to be initiated based on the sixth status information. If the sixth state information indicates that the main and negative relays are in the off state and the high voltage is not applied, the VCU may send a fast discharge command to the MCU after a second preset time period, so as to control the MCU to start fast discharge. Accordingly, the MCU can start the rapid discharge after receiving the rapid discharge command.

Wherein, VCU can start during the fast discharge at MCU, through the electric current in the BMS monitoring BDU circuit, through the electric current in detecting BDU, can judge whether each relay can take place the problem of adhesion at the high-voltage apparatus device, can avoid appearing because whether each relay in detecting BDU can take place the problem of adhesion and damage the high-voltage system in the hydrogen fuel cell car at the high-voltage apparatus device, and is further, can prevent the problem that influences user's personal safety, can improve the whole car security performance of hydrogen fuel cell car.

The first to sixth status messages may be sent to the VCU by the BMS via the CAN bus.

In some embodiments, after the MCU starts the fast discharge, if the VCU determines that the actual voltage of the motor is less than the preset voltage value, the VCU may send a discharge stop command to the MCU after a third preset time period, so as to control the MCU to close the fast discharge. Accordingly, the MCU may turn off the rapid discharge after receiving the stop discharge command.

Wherein, VCU can close the quick discharge period at MCU, through the electric current in the BMS monitoring BDU circuit, if through the electric current in detecting BDU, can judge whether each relay can take place the problem of adhesion at the high-voltage apparatus device, can avoid appearing because whether each relay in detecting BDU can take place the problem of adhesion and damaging the high-voltage system in the hydrogen fuel cell car at the high-voltage apparatus device, and is further, can prevent the problem that influences user's personal safety, can improve the whole car security performance of hydrogen fuel cell car.

In a specific implementation process, the second preset time period may be set according to an actual requirement, for example, may be set to 1 second. The preset voltage value can be set according to actual requirements, and can be set to 60v, for example. The third preset time period may be set according to actual requirements, for example, may be set to 2 seconds.

In some embodiments, the VCU may also send control information to the high voltage device to control the high voltage device to shut down during the power down phase.

Wherein, VCU can be in the period that high-voltage equipment closed, through the electric current in the BMS monitoring BDU, through the electric current in detecting BDU, judge whether each relay can take place the problem of gluing at the high-voltage equipment device, can avoid appearing because whether each relay in detecting BDU can take place to glue at the high-voltage equipment device and damage the problem of the high-voltage system in the hydrogen fuel cell car, and is further, can prevent the problem that influences user's personal safety, can improve the whole car security performance of hydrogen fuel cell car.

In an applicable scenario provided by an embodiment of the present application, during a power down phase, the VCU determines that the FCU has completed powering down before the VCU controls the high voltage device and the MCU, respectively, and sends a corresponding power down command to the BMS. After determining that the FCU is not powered off, the VCU may force the FCU to be powered off after a fourth preset time period elapses. In a specific implementation process, the fourth preset time period may be set according to an actual requirement, for example, may be set to 900 seconds.

In another applicable scenario provided by the embodiment of the present application, in the power-off phase, after the MCU is turned off and discharges rapidly, the VCU may perform data saving and enter the sleep state.

As can be seen from the above description, in the technical solution provided in the embodiment of the present application, in the first sub-power-on stage, the BMS sends the corresponding first power-on command, so that after receiving the corresponding first power-on command, the BMS respectively controls the main negative relay, the pre-charge relay, and the main positive relay in the BDU circuit, and monitors the state of the relay in the BDU circuit and the entire vehicle system voltage of the hydrogen fuel cell vehicle; furthermore, in a second electronic electrifying stage, the relay state in the BDU circuit, the voltage of the whole vehicle system of the hydrogen fuel cell vehicle and the fault state of the whole vehicle are monitored, and the MCU/DCDC is enabled; sending a corresponding second power-on command to the BMS so that the BMS respectively controls a PTC relay and a heating relay in the BDU circuit after receiving the corresponding second power-on command; further, when the vehicle fault is detected to be 3-level or the driver operates the key to power off, the power off stage is started; in the first stage of the power-off stage, the high-voltage equipment and the MCU are respectively controlled, an enabling stop command is sent, the high-voltage equipment is closed, the MCU, the DCDC and the AC are unloaded, the BDU circuit is monitored, and when the current is smaller than a preset value, the second stage of the power-off stage is started; in a second phase; sending a corresponding power-down command to the BMS, so that the BMS respectively controls the main negative relay and the total negative relay in the BDU circuit after receiving the corresponding power-down command, and monitors the relay state in the BDU circuit and the voltage of the whole vehicle system of the hydrogen fuel cell vehicle; the high voltage equipment comprises DCDC, AC and PTC. Through the mode, can go on corresponding detection and the control of unifying more to the whole car high pressure electricity of hydrogen fuel cell car about, thereby can detect whether there is the problem of gluing in the relay of the electric control circuit about the whole car high pressure, can also carry out the insulation detection to the hydrogen fuel cell car, etc., thereby avoid appearing damaging the high-voltage system in the hydrogen fuel cell car and lead to the problem that influences user's personal safety, and is further, can improve the whole car security performance of hydrogen fuel cell car.

Based on the same inventive concept, the embodiment of the application also provides a control device, and the control device is used for the whole vehicle power-on and power-off control of the hydrogen fuel cell vehicle. Wherein, the whole car of hydrogen fuel cell car is gone up the electric control and is included: the power-on phase comprises a first sub power-on phase and a second sub power-on phase, wherein the first sub power-on phase is a main loop power-on phase of the hydrogen fuel cell automobile, and the second sub power-on phase is an enabling and load power-on phase of the hydrogen fuel cell automobile. As shown in fig. 4, the control apparatus 300 may include:

the processing unit 301 is configured to send a corresponding first power-on command to the BMS in the first electronic power-on stage, so that the BMS receives the corresponding first power-on command and then respectively controls a main negative relay, a pre-charge relay, and a main positive relay in the BDU circuit;

a monitoring unit 302, configured to monitor a state of a relay in the BDU circuit and a vehicle system voltage of the hydrogen fuel cell vehicle during the first electronic power-on phase;

the monitoring unit 302 is further configured to monitor a state of a relay in the BDU circuit, a vehicle system voltage of the hydrogen fuel cell vehicle, and a vehicle fault state in the second electronic power-on phase;

the processing unit 301 is further configured to enable MCU/DCDC during the second electronic power-on phase; sending a corresponding second power-on command to the BMS, so that the BMS respectively controls a PTC relay and a heating relay in the BDU circuit after receiving the corresponding second power-on command;

the processing unit 301 is further configured to enter a power-off stage when a vehicle fault is detected to be level 3 or a driver operates a key to power off; in the first stage of the power-off stage, respectively controlling a high-voltage device and an MCU, sending an enabling stop command, closing the high-voltage device, and unloading the MCU, the DCDC and the AC; the high voltage device comprises the DCDC, the AC, the PTC;

the monitoring unit 302 is further configured to monitor a current in the BDU circuit during the first phase, and determine to enter a second phase of the power-down phase when the current is smaller than a preset value;

the processing unit 301 is further configured to send a corresponding power-down command to the BMS in the second stage, so that the BMS controls the main negative relay and the total negative relay in the BDU circuit after receiving the corresponding power-down command;

the monitoring unit 302 is further configured to monitor a state of a relay in the BDU circuit and a vehicle system voltage of the hydrogen fuel cell vehicle during the second phase.

In one possible design, the respective first power-on command includes: a first relay command, a second relay command, a third relay, and a fourth relay command; the processing unit 301 is specifically configured to: sending the first relay command to the BMS so that the BMS controls the main and negative relays to be closed after receiving the first relay command;

the monitoring unit 302 is specifically configured to: monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the main and negative relays through the BMS;

the processing unit 301 is specifically configured to: receiving first state information of the main negative relay fed back by the BMS; if the first state information indicates that the main relay and the negative relay are in a conducting state, sending a second relay command to the BMS, so that the BMS controls the pre-charging relay to be closed for pre-charging after receiving the second relay command;

the monitoring unit 302 is specifically configured to: monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the pre-charging relay through the BMS;

the processing unit 301 is specifically configured to: receiving second state information of the pre-charging relay fed back by the BMS; if the second state information indicates that the pre-charging relay is in a conducting state, judging whether pre-charging is finished or not through the rear end voltage of the relay; if the fact that the pre-charging is completed is determined, sending a third relay command to the BMS, so that the BMS controls the main positive relay to be closed after receiving the third relay command;

the monitoring unit 302 is specifically configured to: monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the main positive relay through the BMS;

the processing unit 301 is specifically configured to: receiving third state information of the main positive relay fed back by the BMS; if the third state information indicates that the main positive relay is in a conducting state, a relay fourth relay command is sent to the BMS, so that the BMS controls the pre-charging relay to be switched off after receiving the fourth relay command;

the monitoring unit 302 is specifically configured to: and monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the pre-charging relay through the BMS.

In one possible design, the processing unit 301 is specifically configured to: receiving fourth state information of the pre-charging relay fed back by the BMS; if the fourth state information indicates that the pre-charging relay is in a disconnected state, determining that the main circuit of the hydrogen fuel cell automobile is powered on, and sending an enabling command to the MCU/the DCDC to enable the MCU/the DCDC;

the monitoring unit 302 is specifically configured to: and monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of a relay in the BDU circuit through the BMS.

In one possible design, the processing unit 301 is further configured to: and if the fact that pre-charging is not completed or overtime is determined, or if the fact that the main circuit of the hydrogen fuel cell automobile is not powered on is determined, entering the power-off stage after a first preset time period.

In one possible design, the respective second power-on command includes: a fifth relay command and a sixth relay command; the processing unit 301 is specifically configured to:

the monitoring unit 302 is specifically configured to: monitoring the voltage of the whole vehicle system of the hydrogen fuel cell vehicle, and monitoring the state of the PTC relay through the BMS;

and/or, the processing unit 301 is specifically configured to: if the battery heating requirement is detected and confirmed, sending a sixth relay command to the BMS so that the BMS controls the heating relay to be closed after receiving the sixth relay command;

the monitoring unit 302 is specifically configured to: and monitoring the voltage of the whole hydrogen fuel cell automobile system, and monitoring the state of the heating relay through the BMS.

the corresponding power down command comprises: a seventh relay command and an eighth relay command; the processing unit 301 is specifically configured to: sending a seventh relay command to the BMS so that the BMS controls the main positive relay to be switched off after receiving the seventh relay command;

the monitoring unit 302 is specifically configured to: receiving fifth state information of the main positive relay fed back by the BMS; if the fifth state information indicates that the main positive relay is in a disconnected state, an eighth relay command is sent to the BMS, so that the BMS controls the main negative relay to be disconnected after receiving the eighth relay command;

the monitoring unit 302 is specifically configured to: and monitoring the voltage of the whole hydrogen fuel cell automobile system, and monitoring the state of the main and negative relays through the BMS.

In one possible design, the processing unit 301 is specifically configured to: sending control information to the high-voltage equipment to control the high-voltage equipment to be closed;

the monitoring unit 302 is specifically configured to: monitoring, by the BMS, a current within the BDU circuit;

the processing unit 301 is specifically configured to: receiving sixth state information of the main negative relay fed back by the BMS; if the sixth state information indicates that the main and negative relays are in a disconnected state and are not high-voltage, after a second preset time, a quick discharge command is sent to the MCU to control the MCU to start quick discharge;

the monitoring unit 302 is specifically configured to: monitoring, by the BMS, a current within the BDU circuit.

In one possible design, the processing unit 301 is further configured to:

wherein the power-up condition comprises:

the key is currently in the START gear;

In one possible design, the processing unit 301 is further configured to: detecting and confirming that the hydrogen fuel cell automobile meets the power-off condition;

wherein the power down condition comprises:

the key is currently in the OFF gear;

the processing unit 301 receives request information for requesting the whole vehicle to cut off the high voltage, which is sent by the BMS and the HMS respectively.

The control device 300 in the embodiment of the present application and the hydrogen fuel cell-based vehicle high-voltage power-on and power-off control method shown in fig. 1 are based on the same concept, and through the foregoing detailed description of the hydrogen fuel cell-based vehicle high-voltage power-on and power-off control method, a person skilled in the art can clearly understand the implementation process of the control device 300 in the embodiment, so for brevity of the description, no further description is provided here.

Based on the same inventive concept, an embodiment of the present application further provides a control device, as shown in fig. 5, the control device 400 may include: at least one memory 401 and at least one processor 402. Wherein:

the at least one memory 401 is used to store one or more programs.

The one or more programs, when executed by the at least one processor 402, implement the overall high voltage power-on/power-off control method of the hydrogen fuel cell-based vehicle described above with respect to fig. 1.

The control device 400 may also optionally include a communication interface for communicating with external devices and for interactive transmission of data.

It should be noted that the memory 401 may include a high-speed RAM memory, and may also include a nonvolatile memory (nonvolatile memory), such as at least one disk memory.

In a specific implementation process, if the memory, the processor and the communication interface are integrated on one chip, the memory, the processor and the communication interface can complete mutual communication through the internal interface. If the memory, the processor and the communication interface are implemented independently, the memory, the processor and the communication interface may be connected to each other through a bus and perform communication with each other.

It should be noted that the control device described in fig. 4 and fig. 5 may be a VCU, or may be a device in which the VCU performs interactive communication, and the embodiment of the present application is not limited.

Based on the same inventive concept, the embodiment of the present application further provides a computer-readable storage medium, where at least one program is stored, and when the at least one program is executed by a processor, the method for controlling the high voltage power on and off of the entire vehicle based on the hydrogen fuel cell vehicle shown in fig. 1 is implemented.

It should be understood that the computer-readable storage medium is any data storage device that can store data or programs which can thereafter be read by a computer system. Examples of computer-readable storage media include: read-only memory, random access memory, CD-ROM, HDD, DVD, magnetic tape, optical data storage devices, and the like.

The computer readable storage medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

Program code embodied on a computer readable storage medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, Radio Frequency (RF), etc., or any suitable combination of the foregoing.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims

1. A whole vehicle power-on and power-off control method of a hydrogen fuel cell vehicle comprises the following steps: the power-on stage and the power-off stage are characterized in that the power-on stage comprises a first sub power-on stage and a second sub power-on stage, wherein the first sub power-on stage is a power-on stage of a main circuit of the whole hydrogen fuel cell automobile, and the second sub power-on stage is an enabling and load power-on stage of the hydrogen fuel cell automobile; the method comprises the following steps:

2. The method of claim 1, wherein the respective first power-up command comprises: a first relay command, a second relay command, a third relay, and a fourth relay command;

3. The method of claim 2, wherein in the second sub-power-up phase, enabling MCU/DCDC comprises:

4. The method of claim 3, wherein the method further comprises:

5. The method of claim 2, wherein the respective second power-up command comprises: a fifth relay command and a sixth relay command;

6. The method of claim 2, wherein separately controlling a high voltage device and an MCU, sending an enable stop command, shutting down the high voltage device, and unloading the MCU, the DCDC, and the AC comprises:

7. The method of claim 6, wherein controlling a high voltage device to monitor current in the BDU circuit comprises:

sending control information to the high-voltage equipment, controlling the high-voltage equipment to be closed, and monitoring the current in the BDU circuit through the BMS;

controlling the MCU, monitoring the current in the BDU circuit, including:

8. The method according to any of claims 1-7, wherein in the first sub-power-up phase, before sending a respective first power-up command to the BMS, the method further comprises:

wherein the power-up condition comprises:

the key is currently in the START gear;

9. The method of claim 8, wherein in the power down phase, before sending a corresponding power down command to the BMS, the method further comprises:

wherein the power down condition comprises:

the key is currently in the OFF gear;

10. A control device for a hydrogen fuel cell vehicle's full body power-on and power-off control, comprising: the power-on stage and the power-off stage are characterized in that the power-on stage comprises a first sub power-on stage and a second sub power-on stage, wherein the first sub power-on stage is a power-on stage of a main circuit of the whole hydrogen fuel cell automobile, and the second sub power-on stage is an enabling and load power-on stage of the hydrogen fuel cell automobile; the control apparatus includes:

the processing unit is further configured to enable the MCU/DCDC during the second sub-power-up phase; sending a corresponding second power-on command to the BMS, so that the BMS respectively controls a PTC relay and a heating relay in the BDU circuit after receiving the corresponding second power-on command;