CN115139861A - Automobile hydrogenation control method and system, whole automobile controller and fuel cell automobile - Google Patents

Abstract

The invention discloses an automobile hydrogenation control method and system, a vehicle control unit and a fuel cell automobile. The method comprises the following steps: acquiring state data of a hydrogen system, and judging whether the hydrogen system is in a filled state or not according to the state data of the hydrogen system; if the hydrogen system is in a filled state, acquiring the power-on state data of the whole vehicle; and controlling a target execution component to perform pre-safety operation according to the power-on state data of the whole vehicle, and entering a hydrogenation working mode after the pre-safety operation is finished. The invention can ensure the feasibility and the safety of the hydrogenation control operation.

Description

Vehicle hydrogenation control method, system, vehicle controller and fuel cell vehicle

technical field

The invention relates to the technical field of fuel cell vehicle control, in particular to a vehicle hydrogenation control method, system, vehicle controller and fuel cell vehicle.

Background technique

Fuel cell vehicles are regarded as an important technical route by many companies due to their advantages of long driving mileage, environmental protection and fast refueling. The hydrogen refueling process of fuel cell vehicles is similar to the refueling process of traditional fuel vehicles. The hydrogen storage bottle on the vehicle needs to be filled up in a short period of time. There are many uncontrollable factors in this process, so hydrogen refueling safety is an important link to ensure the safety of fuel cell vehicles.

At present, the hydrogen system of fuel cell vehicles has two nominal pressure levels: 70MPa and 35MPa. In order to ensure the safety of the hydrogenation process, the domestic 70MPa hydrogen system is usually equipped with an infrared communication device. The infrared signal conducts information exchange, and transmits information such as the pressure, temperature of the hydrogen system and whether hydrogen refueling is allowed to the hydrogen refueling station, and the control system of the hydrogen refueling station judges the corresponding refueling control based on this information. The 35MPa hydrogen system is generally not equipped with an infrared communication device, and the hydrogenation process is "blind", that is, there is no communication between the hydrogenation station and the fuel cell vehicle, and the control system of the hydrogenation station cannot know what state the vehicle is in, and can only pass through the station. The control strategy of the terminal indirectly obtains some information to judge whether it is qualified to accept the hydrogenation control operation.

In addition, if only one equipment of the fuel cell vehicle and the hydrogen refueling station is equipped with an infrared communication device, it also belongs to the above-mentioned form of "blind addition". In addition, abnormal operations occur during the hydrogenation process of the vehicle. When the hydrogenation without communication is performed, the vehicle is in a high-risk situation such as high-pressure state, which cannot be known by the control system of the hydrogenation station. If the hydrogen leaks at this time, the high-voltage electrical components The electric spark generated during operation may detonate the hydrogen, which is a great safety hazard. When the hydrogen is filled, the hydrogen system is in the state of hydrogen supply, which may also cause the failure of its components.

SUMMARY OF THE INVENTION

The present invention provides a vehicle hydrogenation control method, system, vehicle controller and fuel cell vehicle, so as to enhance the safety guarantee in the non-communication hydrogenation process.

The present invention provides an automobile hydrogenation control method, comprising:

Obtaining hydrogen system state data, and judging whether the hydrogen system is in a filled state according to the hydrogen system state data;

If the hydrogen system is in the state of being filled, obtain the power-on state data of the whole vehicle;

According to the power-on state data of the whole vehicle, the target execution component is controlled to perform a pre-safety operation, and after the pre-safety operation is completed, the hydrogen refueling working mode is entered.

Preferably, the acquiring hydrogen system state data, and judging whether the hydrogen system is in a filled state according to the hydrogen system state data, includes:

Obtain the remaining capacity of the hydrogen bottle at the current moment and the remaining capacity of the hydrogen bottle at the previous moment;

Calculate the capacity change rate at the current moment according to the remaining capacity of the hydrogen bottle at the current moment and the remaining capacity of the hydrogen bottle at the previous moment;

If the capacity change rate is greater than the capacity change threshold, the hydrogen system is deemed to be in a charged state.

Preferably, the acquiring hydrogen system state data, and judging whether the hydrogen system is in a filled state according to the hydrogen system state data, includes:

Obtain the remaining capacity and pressure of the hydrogen bottle at the current moment and the remaining capacity and pressure of the hydrogen bottle at the previous moment;

Calculate the capacity change rate at the current moment according to the remaining capacity of the hydrogen bottle at the current moment and the remaining capacity of the hydrogen bottle at the previous moment;

Calculate the pressure change rate at the current moment according to the hydrogen cylinder pressure at the current moment and the hydrogen cylinder pressure at the previous moment;

If the rate of change of capacity is greater than a threshold of capacity change and the rate of change of pressure is greater than a threshold of pressure change, the hydrogen system is deemed to be in a charged state.

Preferably, the power-on state data of the complete vehicle includes the current working state of the fuel cell system; and the control of the target execution component to perform pre-safety operations according to the power-on state data of the complete vehicle includes:

If the current working state of the fuel cell system is the working state, controlling the fuel cell system to shut down, sending a power-off command to the battery management system, and controlling the high-voltage relay to disconnect;

If the current working state of the fuel cell system is a stop working state, a power-off command is sent to the battery management system to control the high-voltage relay to be disconnected.

Preferably, if the hydrogen system is in a state of being filled, acquiring power-on state data of the entire vehicle, including:

If the hydrogen system is in the filled state, obtain vehicle state data, and determine whether the vehicle state data satisfies the state judgment condition corresponding to the hydrogen system in the filled state;

If the vehicle state data satisfies the state judgment condition corresponding to the hydrogen system being in the filled state, the vehicle power-on state data is acquired.

Preferably, the acquiring vehicle state data, and judging whether the vehicle state data satisfies the state judgment condition corresponding to the hydrogen system being in the state of being filled, includes:

Get the speed of the car at the current moment;

If the vehicle speed is zero, it is determined that the vehicle state data satisfies the state judgment condition corresponding to the hydrogen system being in the filled state;

If the vehicle speed is not zero, it is determined that the vehicle state data does not meet the state judgment condition corresponding to the hydrogen system being in a state of being filled.

Preferably, after judging whether the vehicle state data satisfies a state judgment condition corresponding to the hydrogen system being in a state of being filled, the vehicle hydrogenation control method further includes:

If the vehicle state data does not satisfy the state judgment condition corresponding to the hydrogen system being in the filled state, perform fault diagnosis on the pressure sensor and the temperature sensor on the hydrogen system, and obtain a fault diagnosis result;

According to the fault diagnosis result, the target protection strategy is executed.

The present invention provides a vehicle controller, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, and when the processor executes the computer program, the above-mentioned vehicle hydrogenation can be realized Control Method.

The present invention provides a vehicle hydrogenation control system, comprising a vehicle controller, a hydrogen management system connected to the vehicle controller, an on-board sensor and a fuel cell system; the vehicle controller is based on data collected by the hydrogen management system. The hydrogen system state data, the vehicle state data collected by the on-board sensors, and the power-on state data of the entire vehicle are used for hydrogen refueling control.

The present invention provides a fuel cell vehicle, comprising the above-mentioned vehicle hydrogenation control system.

The above-mentioned vehicle hydrogenation control method, system, vehicle controller and fuel cell vehicle, only when the hydrogen system state data satisfy the state of being filled, will the rationality of the vehicle's power-on state be determined. The power-on state data controls the target execution components to perform pre-safety operations. On the one hand, it can ensure that the hydrogen system is in a state of being filled, ensuring the feasibility of hydrogenation control; on the other hand, it can ensure the hydrogenation control after entering the hydrogenation working mode. Operational safety.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the drawings that are used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. , for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

Fig. 1 is a schematic diagram of an automobile hydrogenation control system in an embodiment of the present invention;

Fig. 2 is a flow chart of the vehicle hydrogenation control method in an embodiment of the present invention;

Fig. 3 is another flow chart of the vehicle hydrogenation control method in an embodiment of the present invention;

Fig. 4 is another flow chart of the vehicle hydrogenation control method in an embodiment of the present invention;

Fig. 5 is another flow chart of the vehicle hydrogenation control method in an embodiment of the present invention;

Fig. 6 is another flow chart of the vehicle hydrogenation control method in one embodiment of the present invention;

Fig. 7 is another flow chart of the vehicle hydrogenation control method in an embodiment of the present invention;

Fig. 8 is another flow chart of the vehicle hydrogenation control method in an embodiment of the present invention;

FIG. 9 is another flow chart of a method for controlling hydrogenation of an automobile according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The vehicle hydrogenation control method provided by the embodiment of the present invention can be applied in the application environment shown in FIG. 1 . Specifically, the vehicle hydrogenation control method is applied in a vehicle hydrogenation control system, and the vehicle hydrogenation control system includes a vehicle controller (VCU), a hydrogen management system connected to the vehicle controller, vehicle sensors and a fuel cell system , The vehicle hydrogenation control system is used to realize the hydrogenation control and ensure the safety of the hydrogenation process according to the hydrogen system status data collected by the hydrogen management system, the vehicle status data collected by the on-board sensors, and the vehicle power-on status data.

Among them, the hydrogen management system is a management system connected with the hydrogen system and the vehicle controller, which is used to collect the hydrogen system status data of the hydrogen storage cylinders in the hydrogen system, and send the hydrogen system status data to the vehicle controller, so that the The vehicle controller ensures the safety of hydrogenation control according to the hydrogen system status data. As an example, the hydrogen system state data includes, but is not limited to, the remaining hydrogen volume of the hydrogen storage cylinder and the pressure of the hydrogen cylinder.

Among them, the on-board sensor is a sensor connected to the vehicle controller for collecting vehicle status data, for collecting vehicle status data, and sending the vehicle status data to the vehicle controller, so that the vehicle controller can collect the vehicle status data according to the vehicle status data. , to ensure the safety of hydrogenation control. As an example, vehicle status data includes, but is not limited to, vehicle speed.

Among them, the fuel cell system refers to a power generation system with a fuel cell as the core, and a fuel supply system, an oxidant supply system, a water/heat management system, and a controller. As an example, the fuel cell system controller is connected to the vehicle controller for collecting and acquiring the power-on status data of the vehicle, and sending the power-on status data to the vehicle controller, so that the vehicle controller can The power-on status data of the whole vehicle ensures the safety of hydrogenation control.

In one embodiment, as shown in FIG. 2 , the present invention provides a vehicle hydrogenation control method, which is illustrated by applying the vehicle hydrogenation control method to the vehicle controller shown in FIG. 1 as an example. The method includes the following: step:

S201: Acquire hydrogen system state data, and determine whether the hydrogen system is in a filled state according to the hydrogen system state data.

S202: If the hydrogen system is in a state of being filled, obtain the data on the power-on state of the entire vehicle.

S203: According to the power-on state data of the whole vehicle, the target execution component is controlled to perform a pre-safety operation, and after the pre-safety operation is completed, the hydrogen refueling working mode is entered.

The hydrogen system state data is data collected in real time and used to reflect the current state of the hydrogen system.

As an example, in step S201, the hydrogen management system collects the hydrogen system status data in real time, and can send the hydrogen system status data to the vehicle controller, so that the vehicle controller receives the hydrogen system status data and determines whether the hydrogen system status data is The hydrogen system filling conditions are met. If the hydrogen system state data meets the hydrogen system filling conditions, it is determined that if the hydrogen system is in the filling state, the subsequent control steps are executed to ensure the safety of hydrogenation control.

The hydrogen system refilling condition is a preset condition for evaluating whether the hydrogen system state data satisfies the hydrogen refueling control.

As another example, in step S201, the hydrogen management system collects the hydrogen system state data in real time, and judges whether the hydrogen system state data satisfies the hydrogen system filling condition. If the hydrogen system state data meets the hydrogen system filling condition, it is determined that the hydrogen system is in In the state of being filled, the hydrogen system state judgment result is sent to the vehicle controller, so that the vehicle controller can determine whether the hydrogen system is in the state of being filled according to the judgment result of the hydrogen system state, so as to execute the subsequent control steps to ensure the filling state. Safety of hydrogen control.

Specifically, it can be determined whether the change of the hydrogen system state data per unit time satisfies the hydrogen system filling condition according to the change of the hydrogen system state data collected in a unit time, so as to determine whether the hydrogen system is in a state of being filled. As an example, the hydrogen system filling condition here may refer to the hydrogen filling test after the hydrogen filling gun of the hydrogen filling station is inserted into the hydrogen filling port of the fuel cell vehicle. Generally speaking, when the hydrogen refueling test is performed after the hydrogen refueling gun of the hydrogen refueling station is inserted into the hydrogen refueling port of the fuel cell vehicle, it is necessary to evaluate whether the changes in the collected hydrogen system state data meet the hydrogen system refueling conditions. Thereby, it is judged whether the hydrogen system is in a state of being filled. Understandably, inserting the hydrogen refueling gun of the hydrogen refueling station into the hydrogen refueling port of the fuel cell vehicle is a prerequisite for realizing the hydrogen refueling station to the fuel cell vehicle, thereby ensuring the feasibility of hydrogen refueling control.

The power-on state data of the entire vehicle is data collected in real time and used to reflect the current working state of the fuel cell system. The current working state includes the working state and the stopped working state. The working state here can be understood as the state in which the stack in the fuel cell system is undergoing an electrochemical reaction, and the stopped working state can be understood as the state where the stack in the fuel cell system is not working. A state in which an electrochemical reaction is taking place.

As an example, in step S202, the vehicle controller needs to collect and obtain the power-on state data of the vehicle in real time when the hydrogen system is in the state of being filled. The current operating state of the battery system.

As an example, in step S203, the vehicle controller may determine the target execution component matching the vehicle power-on state data according to the vehicle power-on state data, and then control the target execution component to perform pre-safety operations to ensure fuel efficiency The battery system is in a shutdown state, the high-voltage relay is in a disconnected state, and the power battery is in a high-voltage power-off state, and then enters the hydrogenation working mode to realize the mutual exclusion and uniqueness of the hydrogenation control process and the high voltage on the vehicle, and avoid the hydrogenation process. There is a safety hazard caused by hydrogen leakage during the injection process.

The target execution component refers to a component that performs pre-safety operations. For example, the target execution component includes but is not limited to the controller of the fuel cell system, the high-voltage relay connected to the power battery, and the battery management system. The pre-safety operation here refers to the operation performed to ensure the safety of hydrogenation before the fuel cell vehicle enters the hydrogenation working mode.

As an example, after the pre-safety operation is completed, the hydrogen refueling working mode is entered, which can be specifically understood as the process of transferring hydrogen from the hydrogen refueling station to the hydrogen storage cylinder of the fuel cell vehicle. Real-time monitoring of current hydrogenation data such as hydrogen concentration in the environment, and safety control based on the current hydrogenation data monitored in real time. For example, when the hydrogen concentration in the environment is greater than the target concentration threshold, it can be determined that there is hydrogen leakage, and in order to ensure the safety of the hydrogen filling process, the hydrogenation working mode can be terminated.

In the vehicle hydrogenation control method provided in this embodiment, only when the state data of the hydrogen system satisfies the state of being filled, the rationality of the power-on state of the whole vehicle will be judged, and the control target will be executed according to the power-on state data of the whole vehicle. Pre-safe operation of components can, on the one hand, ensure that the hydrogen system is in a state of being filled and ensure the feasibility of hydrogen refueling control; Safety of hydroprocessing control operations.

In one embodiment, as shown in FIG. 3 , in step S201, the hydrogen system state data is obtained, and according to the hydrogen system state data, it is determined whether the hydrogen system is in a state of being filled, including:

S301: Obtain the remaining capacity of the hydrogen bottle at the current moment and the remaining capacity of the hydrogen bottle at the previous moment.

S302: Calculate the capacity change rate at the current moment according to the remaining capacity of the hydrogen cylinder at the current moment and the remaining capacity of the hydrogen cylinder at the previous moment.

S303: If the capacity change rate is greater than the capacity change threshold, it is determined that the hydrogen system is in a state of being filled.

The remaining capacity of the hydrogen bottle refers to the remaining capacity of the hydrogen in the hydrogen storage bottle of the hydrogen system. Generally speaking, during the driving process of the fuel cell vehicle, the hydrogen in the hydrogen storage bottle is in a state of being consumed, so the remaining capacity of the hydrogen bottle is in a state of decline. The rate of change of capacity is a numerical value that calculates the change of capacity in the hydrogen storage cylinder in real time. The capacity change threshold is a preset threshold for evaluating whether the capacity change of the hydrogen storage bottle satisfies the filling conditions of the hydrogen system. The capacity change threshold is a threshold set according to the capacity change during the hydrogen filling test, and is generally set as a positive number.

As an example, in step S301, the hydrogen management system collects the remaining capacity of the hydrogen bottle at the current moment, and specifically can perform correction calculation according to the pressure of the hydrogen bottle and the temperature of the hydrogen bottle in the hydrogen system to determine the remaining capacity of the hydrogen bottle at the current moment. In this example, the remaining capacity of the hydrogen bottle at the current moment can be the capacity value calculated in real time using the capacity calculation formula according to the pressure and temperature of the hydrogen bottle, or the capacity value that is latched after the end of the previous workflow. The pressure of the hydrogen bottle can be the pressure collected in real time by a pressure sensor disposed on the pipeline cavity between the bottle valve of the hydrogen storage bottle and the pressure reducing valve. When the bottle valve of the hydrogen storage bottle is opened, the pressure of the hydrogen bottle is The internal pressure of the hydrogen storage tank. The temperature of the hydrogen bottle can be the temperature collected in real time by a temperature sensor arranged on the bottle valve of the hydrogen storage bottle. Understandably, both the pressure sensor and the temperature sensor are standard configurations of the hydrogen system of the fuel cell vehicle, and no additional components are required, which can ensure the safety of hydrogenation control without additional cost.

As an example, in step S302, the hydrogen management system or the vehicle controller may calculate and determine the capacity change rate at the current moment according to the remaining capacity of the hydrogen cylinder at the current moment and the remaining capacity of the hydrogen cylinder at the previous moment. For example, the remaining capacity of the hydrogen bottle at the current moment is C1, and the remaining capacity of the hydrogen bottle at the previous moment is C0, then the capacity change rate Vc=(C1-C0)/(T1-T0) at the current moment, T1 and T0 are the current moment and previous moment. Generally speaking, the hydrogen management system collects the remaining capacity of the hydrogen cylinder every unit time, then the time difference T1-T0 between the current moment and the previous moment can be set to 1, so that the capacity change rate Vc is the remaining capacity of the hydrogen cylinder at the current moment and the The difference between the remaining capacity of the hydrogen bottle at the previous moment is the value of C1-C0, which helps to simplify the calculation process and improve the processing efficiency.

As an example, in step S303, the hydrogen management system or the vehicle controller may compare the capacity change rate at the current moment with a preset capacity change threshold; if the capacity change rate at the current moment is greater than the capacity change threshold, it is determined that the hydrogen The system state data meets the hydrogen system filling conditions, that is, the hydrogen system is considered to be in the state of being filled; if the capacity change rate at the current moment is not greater than the capacity change threshold, it is determined that the hydrogen system state data does not meet the hydrogen system filling conditions, that is, it is determined that the hydrogen system is in a state of being filled. The system is not primed.

Generally speaking, if the hydrogen refueling station implements the standard refueling protocol, the refueling test needs to be performed after the hydrogen refueling gun is inserted into the hydrogen refueling port of the fuel cell vehicle. For example, the hydrogen refueling station can use 1-2 pulses to perform the filling test, that is, the filling is suspended for a preset time after each short filling of about 1-2s, and the remaining capacity of the hydrogen bottle increases briefly and then decreases. And it is slightly higher than the remaining capacity of the hydrogen bottle before filling; according to the remaining capacity of the hydrogen bottle at the current moment and the remaining capacity of the hydrogen bottle at the previous moment, determine the capacity change rate at the current moment, and compare the capacity change rate and the capacity change threshold; if the capacity If the change rate is greater than the capacity change threshold, it is determined that the hydrogen system state data meets the hydrogen system filling conditions, and it is determined that the fuel cell vehicle is in the state of the hydrogen filling test (that is, it is determined that the hydrogen system is in the state of being filled). Inserting the hydrogen refueling port of the fuel cell vehicle can ensure the feasibility of hydrogen refueling control.

In the vehicle hydrogenation control method provided in this embodiment, the capacity change rate is determined according to the remaining capacity of the hydrogen bottle collected at the current moment and the remaining capacity of the hydrogen bottle collected at the previous moment, and the capacity change rate is compared with the capacity change threshold When the capacity change rate is greater than the capacity change threshold, it is determined that the fuel cell vehicle is in the state of hydrogen filling test, that is to say, the hydrogen filling gun of the hydrogen filling station is inserted into the hydrogen filling port of the fuel cell vehicle, so that the fuel cell vehicle is in the state of being refueled. Note that the hydrogen system state data can be confirmed to meet the hydrogen system filling conditions, that is, it is determined that the hydrogen system is in the filling state, so as to perform subsequent hydrogenation control operations.

In one embodiment, as shown in FIG. 4 , in step S201, the hydrogen system state data is obtained, and according to the hydrogen system state data, it is determined whether the hydrogen system is in a state of being filled, including:

S401: Obtain the remaining capacity and pressure of the hydrogen bottle at the current moment, and the remaining capacity and pressure of the hydrogen bottle at the previous moment.

S402: Calculate the capacity change rate at the current moment according to the remaining capacity of the hydrogen cylinder at the current moment and the remaining capacity of the hydrogen cylinder at the previous moment.

S403: Calculate the pressure change rate at the current moment according to the hydrogen cylinder pressure at the current moment and the hydrogen cylinder pressure at the previous moment.

S404: If the capacity change rate is greater than the capacity change threshold and the pressure change rate is greater than the pressure change threshold, it is determined that the hydrogen system is in a filled state.

The pressure change threshold is a preset threshold for evaluating whether the pressure change of the hydrogen storage bottle satisfies the filling condition of the hydrogen system.

As an example, in step S401, the hydrogen management system collects the hydrogen cylinder pressure and hydrogen cylinder temperature of the hydrogen system at the current moment; the hydrogen cylinder pressure of the hydrogen system and the hydrogen cylinder temperature of the hydrogen system can be corrected and calculated to determine the hydrogen cylinder temperature at the current moment. Bottle remaining capacity. In this example, the remaining capacity of the hydrogen bottle at the current moment can be the capacity value calculated in real time using the calculation formula according to the pressure and temperature of the hydrogen bottle, or the capacity value that is latched after the end of the previous workflow. The pressure of the hydrogen bottle can be the pressure collected in real time by a pressure sensor disposed on the pipeline cavity between the bottle valve of the hydrogen storage bottle and the pressure reducing valve. When the bottle valve of the hydrogen storage bottle is opened, the pressure of the hydrogen bottle is The internal pressure of the hydrogen storage tank. The temperature of the hydrogen bottle can be the temperature collected in real time by a temperature sensor arranged on the bottle valve of the hydrogen storage bottle. Understandably, both the pressure sensor and the temperature sensor are standard configurations of the hydrogen system of the fuel cell vehicle, and no additional components are required, so that the safety of the hydrogenation control can be ensured without any additional cost.

As an example, in step S402, the hydrogen management system or the vehicle controller may calculate and determine the capacity change rate at the current moment according to the remaining capacity of the hydrogen cylinder at the current moment and the remaining capacity of the hydrogen cylinder at the previous moment. The hydrogen management system or the vehicle controller can also calculate the pressure change rate at the current moment according to the hydrogen cylinder pressure at the current moment and the hydrogen cylinder pressure at the previous moment. For example, the pressure of the hydrogen bottle at the current moment is P1, and the pressure of the hydrogen bottle at the previous moment is P0, then the pressure change rate at the current moment is Vp=(P1-P0)/(T1-T0), T1 and T0 are the current moment and last moment. Generally speaking, the hydrogen management system collects the pressure of the hydrogen cylinder every unit time, then the time difference T1-T0 between the current moment and the previous moment can be set to 1, so that the pressure change rate Vp is the current moment and the previous moment. The difference between the pressures of the hydrogen cylinders at the moment is the value of P1-P0, which helps to simplify the calculation process and improve the processing efficiency.

As an example, in step S404, the hydrogen management system or the vehicle controller may compare the capacity change rate at the current moment with the preset capacity change threshold, and compare the pressure change rate at the current moment with the preset pressure change threshold Compare; if the capacity change rate is greater than the capacity change threshold, and the pressure change rate is greater than the pressure change threshold, it is determined that the hydrogen system state data meets the hydrogen system filling conditions, that is, the hydrogen system is considered to be in a state of being filled; if the capacity change rate is not greater than If the capacity change threshold, or the pressure change rate is not greater than the pressure change threshold, it is determined that the hydrogen system state data does not meet the filling conditions of the hydrogen system, that is, it is determined that the hydrogen system is not in the state of being filled.

Generally speaking, if the hydrogen refueling station implements the standard refueling protocol, the refueling test needs to be performed after the hydrogen refueling gun is inserted into the hydrogen refueling port of the fuel cell vehicle. For example, the hydrogen refueling station can use 1-2 pulses for the filling test, that is, after each short filling of about 1-2s, the filling is suspended for a preset time, and the pressure of the hydrogen bottle and the remaining capacity of the hydrogen bottle are both briefly increased. After the filling is stopped for a preset time, the pressure of the hydrogen bottle at the current moment can be collected and the remaining capacity of the hydrogen bottle at the current moment can be calculated. Then, according to the remaining capacity of the hydrogen bottle at the current moment and the remaining capacity of the hydrogen bottle at the previous moment, the rate of change of the capacity at the current moment is determined, and the pressure at the current moment is determined according to the pressure of the hydrogen bottle at the current moment and the pressure of the hydrogen bottle at the previous moment. rate of change. The volume change rate and the volume change threshold are then compared, and the pressure change rate and pressure change threshold are compared. If the capacity change rate is greater than the capacity change threshold, and the pressure change rate is greater than the pressure change threshold, it is determined that the hydrogen system state data meets the hydrogen system filling conditions, and it is determined that the fuel cell vehicle is in the state of the hydrogen filling test, that is, it is determined that the hydrogen system is in the state of being filled. Note that, at this time, the hydrogen refueling gun of the hydrogen refueling station is inserted into the hydrogen refueling port of the fuel cell vehicle, which can ensure the feasibility of hydrogen refueling control. Understandably, the combination of the pressure change rate and the capacity change rate is used to determine whether the hydrogen system is in a charged state. Compared with the evaluation method that only uses the capacity change rate to determine whether the hydrogen system is in a charged state, ambient temperature changes can be excluded. Disturbances that cause the remaining capacity of the hydrogen cylinder to rise, making the assessment more accurate.

In one embodiment, as shown in FIG. 5 , in step S203, according to the power-on state data of the entire vehicle, the target execution component is controlled to perform a pre-safety operation, including:

S501: If the current working state of the fuel cell system is the working state, control the fuel cell system to shut down, send a power-off command to the battery management system, and control the high-voltage relay to disconnect.

S502 : if the current working state of the fuel cell system is a stop working state, send a power-off command to the battery management system to control the high-voltage relay to be disconnected.

As an example, when the hydrogen system is in a state of being filled, the vehicle controller may receive a current state code sent by the controller of the fuel cell system, and determine the current working state of the fuel cell system according to the current state code. The current working state of the fuel cell system is the working state, which means that the fuel cell system is connected to the power battery at this time, and the fuel cell system supplies power to the power battery or absorbs the excess electricity generated by the power battery, so that the fuel cell vehicle is in a high-voltage state as a whole. In order to avoid the safety risk caused by the spark detonating the leaked hydrogen gas in the high-pressure state, at this time, it is necessary to control the fuel cell system to shut down before entering the hydrogenation working mode to ensure that the fuel cell system is in a stopped working state. Then, the vehicle controller needs to send a power-off command to the battery management system connected to the power battery to control the disconnection of the high-voltage relay connected to the power battery, so that the power battery is in a state of prohibiting high-voltage, so as to avoid the high-voltage relay to the vehicle load. The safety risk caused by the sparks formed by the high voltage electricity formed during the power supply process detonating the leaked hydrogen gas. Understandably, after the vehicle controller sends a power-off command to the battery management system to control the disconnection of the high-voltage relay connected to the power battery, it can ensure that when the fuel cell vehicle enters the hydrogenation working mode, the hydrogenation control operation and the whole vehicle can be ensured. The mutual exclusivity and uniqueness of the upper high pressure state realizes the interlocking protection function of hydrogen-electric separation, thereby ensuring the safety of the hydrogenation process.

As another example, when the current working state of the fuel cell system is the stop working state, it means that the fuel cell system is not supplying power to the power battery at this time, and the vehicle controller needs to send a power-off signal to the battery management system connected to the power battery at this time. Instructions to control the disconnection of the high-voltage relay connected to the power battery, so that the power battery is in a state of prohibiting high-voltage, so as to avoid the spark caused by the high-voltage electricity formed in the process of supplying power to the vehicle load from the high-voltage relay. security risks.

In one embodiment, as shown in FIG. 6 , step S202 , that is, when the hydrogen system is in the state of being filled, obtain the power-on state data of the whole vehicle, including:

S601 : when the hydrogen system is in a filled state, obtain vehicle state data, and determine whether the vehicle state data satisfies a state judgment condition corresponding to the state of the hydrogen system being filled.

S602: If the vehicle state data satisfies the state judgment condition corresponding to the hydrogen system being in the filled state, acquire the power-on state data of the entire vehicle.

The vehicle state data is data collected in real time and used to reflect the current state of the vehicle, including but not limited to the vehicle speed. The state judgment condition corresponding to the hydrogen system being in the filled state refers to the state that the vehicle should enter when the hydrogen system is in the filled state. For example, when the hydrogen system is in a state of being filled, the car should be in a stationary state, and its state judgment condition is used to evaluate whether the vehicle is in a stationary state.

As an example, in step S601, when the vehicle controller determines that the hydrogen system state data satisfies the hydrogen system filling condition, that is, when it is determined that the hydrogen system is in the filling state according to the hydrogen system state data, it needs to collect the vehicle state data in real time, according to Judging whether the vehicle status data meets the state judgment conditions corresponding to the hydrogen system being filled, such as determining whether the fuel cell vehicle is in a stationary state according to the vehicle state data, so as to determine the state result of the hydrogen system being filled with the hydrogen system state data Further verification is performed to ensure the accuracy of the judgment result for judging that the hydrogen system is in the state of being filled.

As an example, in step S602, the vehicle controller only collects and obtains the vehicle power-on state data when it determines that the vehicle state data meets the state judgment condition corresponding to the hydrogen system being in the filled state, so as to obtain the vehicle power-on state data according to the vehicle's power-on state. The data control target execution unit performs pre-safety operations. In this example, when the vehicle controller determines that the hydrogen system is in the filling condition according to the hydrogen system state data, and the vehicle state data meets the corresponding state judgment conditions, it will collect the vehicle power-on state data to use the vehicle state data. The interference elimination of the hydrogen system state data is carried out to avoid errors in the judgment of the hydrogen system state data, thereby ensuring the accuracy of the judgment results.

In one embodiment, as shown in FIG. 7 , in step S601, vehicle state data is acquired, and it is determined whether the vehicle state data meets the state judgment condition corresponding to the hydrogen system being in the state of being filled, including:

S701: Obtain the vehicle speed at the current moment.

S702: If the vehicle speed is zero, it is determined that the vehicle state data satisfies the state judgment condition corresponding to the state of being filled with the hydrogen system.

S703: If the vehicle speed is not zero, it is determined that the vehicle state data does not meet the state judgment condition corresponding to the hydrogen system being in the filled state.

Generally speaking, when the fuel cell vehicle is in the driving state, the hydrogen refueling control cannot be realized. At this time, the collected hydrogen system state data cannot meet the hydrogen system refilling conditions. When the state of the fuel cell vehicle is in the running state, it is corrected by determining whether the current working state of the fuel cell vehicle is the driving state, so as to ensure the accuracy of the state data of the hydrogen system.

As an example, in step S701, when the hydrogen system is in the state of being filled, the vehicle controller can obtain the vehicle speed at the current moment collected by the wheel speed sensor in real time, so as to determine whether the fuel cell vehicle is in the driving state according to the vehicle speed, and then Verify hydrogen system status data.

As an example, in step S702, when the vehicle speed at the current moment collected in real time is zero, the vehicle controller can determine that the fuel cell vehicle is in a stationary state rather than a driving state at the current moment, and can determine that the vehicle state data satisfies the hydrogen system The state judgment condition corresponding to the filled state. Understandably, when it is determined according to the hydrogen system state data that the hydrogen system is in the filling condition and the vehicle speed is zero, it can be determined that the hydrogen system of the fuel cell vehicle is in the filling state. The judgment result is more accurate, and the abnormal sensor interference is excluded. Ensure the accuracy of hydrogen system status data collection.

As an example, in step S703, when the vehicle speed of the vehicle at the current moment collected in real time is not zero, the vehicle controller may determine that the fuel cell vehicle is in a driving state at the current moment, since it is impossible to perform a hydrogen filling test in the driving state, Therefore, it can be determined that the state data of the hydrogen system used for evaluating the state of being filled with the hydrogen system is most likely the data collected when the sensor is abnormal. That is, when the pressure sensor and temperature sensor are abnormal, even when the fuel cell vehicle is running, the hydrogen system state data collected by the fuel cell vehicle may meet the hydrogen system filling conditions. For example, when the sensor is abnormal, the remaining capacity of the hydrogen cylinder is abnormal. An increase or an abnormal rise in the pressure of the hydrogen cylinder. For example, under normal circumstances, if the fuel cell vehicle is not filled with hydrogen, the remaining capacity of the hydrogen cylinder and the pressure of the hydrogen cylinder will gradually decrease with consumption, and the rate of reduction depends on the operating conditions of the fuel cell vehicle and the level of hydrogen consumption; but Under individual working conditions, such as changes in the ambient temperature of the vehicle, the instantaneous opening of the hydrogen bottle causes pressure fluctuations and sensor abnormalities at the position of the pressure sensor, resulting in the residual capacity of the hydrogen bottle and the pressure of the hydrogen bottle even if no hydrogen is filled. Rising, in order to eliminate the interference of the abnormal sensor, the vehicle speed is collected to determine whether the fuel cell vehicle is in a driving state, and the collected hydrogen system status data is verified, which helps to ensure the safety of hydrogen refueling control operations.

In one embodiment, as shown in FIG. 8 , after step S601, that is, after judging whether the vehicle state data satisfies the state judgment condition corresponding to the state of being filled with the hydrogen system, the vehicle hydrogenation control method further includes:

S801: If the vehicle state data does not meet the state judgment condition corresponding to the hydrogen system being in the filled state, perform fault diagnosis on the pressure sensor and the temperature sensor on the hydrogen system, and obtain the fault diagnosis result.

S802: Execute the target protection strategy according to the fault diagnosis result.

As an example, in step S801, if the hydrogen system is in the filled state and the vehicle state data does not meet the state judgment condition corresponding to the hydrogen system in the filled state, for example, the data collected when the fuel cell vehicle is in the running state The hydrogen system state data meets the hydrogen system filling conditions, and it can be determined that the sensor that collects the hydrogen system state data is abnormal. Therefore, it is necessary to perform fault diagnosis on the pressure sensor and temperature sensor on the hydrogen system to obtain the fault diagnosis result.

As an example, in step S802, after obtaining the fault diagnosis result, the vehicle controller needs to first determine the corresponding target protection strategy according to the fault diagnosis result, and then execute the target protection strategy to control the corresponding target execution components to perform fault protection operate.

In one embodiment, as shown in FIG. 9 , before step S201 , that is, before obtaining the hydrogen system state data, and before judging whether the hydrogen system is in the state of being filled according to the hydrogen system state data, the vehicle hydrogenation control method further includes: include:

S901: Receive a power-on start command, and collect power-on status data based on the power-on start command;

S902: Send a power-on command to the battery management system when the power-on state data meets the power-on start condition.

The power-on start command refers to a start command triggered after the fuel cell vehicle is powered on. The power-on status data is the status data collected in real time by the vehicle controller starting the self-check program after receiving the power-on start command. The power-on start condition is a preset condition for evaluating whether the high voltage can be applied. Generally speaking, the power-on start-up conditions include the condition of not being in the hydrogenation working mode to ensure the mutual exclusion and uniqueness of the hydrogenation control operation and the high pressure on the vehicle, thereby ensuring the safety of the hydrogenation control operation.

As an example, when the user operates the OFF/ON key to cause the vehicle controller to receive a power-on start command, the vehicle controller starts a preset self-check program based on the power-on start command, collects power-on status data, and only When the power-on status data meets the power-on start conditions, the power-on command is sent to the battery management system to control the vehicle to enter the high-voltage state.

It should be understood that the sequence numbers of the steps in the above embodiments do not imply the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

In one embodiment, the present invention also provides a vehicle controller, including a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, the vehicle in the above embodiment is implemented The hydrogenation control method, such as S201-S203 shown in FIG. 2 , or shown in FIG. 3 to FIG. 9 , is not repeated here in order to avoid repetition.

Those skilled in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium , when the computer program is executed, it may include the processes of the above-mentioned method embodiments. Wherein, any reference to memory, storage, database or other medium used in the various embodiments provided in this application may include non-volatile and/or volatile memory. Nonvolatile memory may include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous chain Road (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. Module completion, that is, dividing the internal structure of the device into different functional units or modules to complete all or part of the functions described above.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: The recorded technical solutions are modified, or some technical features thereof are equivalently replaced. These modifications or substitutions shall be included within the protection scope of the present invention as long as the essence of the corresponding technical solutions does not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. a vehicle hydrogenation control method, is characterized in that, comprises: Obtaining hydrogen system state data, and determining whether the hydrogen system is in a filled state according to the hydrogen system state data; If the hydrogen system is in the state of being filled, obtain the power-on state data of the whole vehicle; According to the power-on state data of the whole vehicle, the target execution component is controlled to perform a pre-safety operation, and after the pre-safety operation is completed, the hydrogen refueling working mode is entered. 2. The vehicle hydrogenation control method according to claim 1, wherein the acquiring hydrogen system state data, and judging whether the hydrogen system is in a state of being filled according to the hydrogen system state data, comprises: Obtain the remaining capacity of the hydrogen bottle at the current moment and the remaining capacity of the hydrogen bottle at the previous moment; Calculate the capacity change rate at the current moment according to the remaining capacity of the hydrogen bottle at the current moment and the remaining capacity of the hydrogen bottle at the previous moment; If the capacity change rate is greater than the capacity change threshold, the hydrogen system is deemed to be in a charged state. 3. The vehicle hydrogenation control method according to claim 1, wherein the acquiring hydrogen system state data, and judging whether the hydrogen system is in a filled state according to the hydrogen system state data, comprises: Obtain the remaining capacity and pressure of the hydrogen bottle at the current moment and the remaining capacity and pressure of the hydrogen bottle at the previous moment; Calculate the capacity change rate at the current moment according to the remaining capacity of the hydrogen bottle at the current moment and the remaining capacity of the hydrogen bottle at the previous moment; Calculate the pressure change rate at the current moment according to the hydrogen cylinder pressure at the current moment and the hydrogen cylinder pressure at the previous moment; If the rate of change of capacity is greater than a threshold of capacity change and the rate of change of pressure is greater than a threshold of pressure change, the hydrogen system is deemed to be in a charged state. 4 . The vehicle hydrogenation control method according to claim 1 , wherein the data on the power-on state of the entire vehicle includes the current working state of the fuel cell system; and the control target is controlled according to the data on the power-on state of the entire vehicle. 5 . Execute components for pre-safety operations, including: If the current working state of the fuel cell system is the working state, controlling the fuel cell system to shut down, sending a power-off command to the battery management system, and controlling the high-voltage relay to disconnect; If the current working state of the fuel cell system is a stop working state, a power-off command is sent to the battery management system to control the high-voltage relay to be disconnected. 5 . The vehicle hydrogenation control method according to claim 1 , wherein, if the hydrogen system is in a filled state, acquiring power-on state data of the entire vehicle, comprising: 6 . If the hydrogen system is in the filled state, obtain vehicle state data, and determine whether the vehicle state data satisfies the state judgment condition corresponding to the hydrogen system in the filled state; If the vehicle state data satisfies the state judgment condition corresponding to the hydrogen system being in the filled state, the vehicle power-on state data is acquired. 6 . The vehicle hydrogenation control method according to claim 5 , wherein the acquiring vehicle state data and judging whether the vehicle state data satisfies a state judgment condition corresponding to the hydrogen system being in a state of being filled, comprising: 6 . : Get the speed of the car at the current moment; If the vehicle speed is zero, it is determined that the vehicle state data satisfies the state judgment condition corresponding to the hydrogen system being in the filled state; If the vehicle speed is not zero, it is determined that the vehicle state data does not meet the state judgment condition corresponding to the hydrogen system being in a state of being filled. 7 . The vehicle hydrogenation control method according to claim 5 , wherein after judging whether the vehicle state data satisfies a state judgment condition corresponding to the hydrogen system being in a state of being filled, the vehicle is refueled. 8 . Hydrogen control methods also include: If the vehicle state data does not satisfy the state judgment condition corresponding to the hydrogen system being in the filled state, perform fault diagnosis on the pressure sensor and the temperature sensor on the hydrogen system, and obtain a fault diagnosis result; According to the fault diagnosis result, the target protection strategy is executed. 8. A vehicle controller comprising a memory, a processor and a computer program stored in the memory and running on the processor, wherein the processor implements the following when executing the computer program. The vehicle hydrogenation control method according to any one of claims 1 to 7. 9. An automobile hydrogenation control system, characterized in that it comprises the complete vehicle controller of claim 8, a hydrogen management system connected to the complete vehicle controller, an on-board sensor and a fuel cell system; the complete vehicle controller , hydrogen refueling control is performed according to the hydrogen system state data collected by the hydrogen management system, the vehicle state data collected by the vehicle-mounted sensor, and the vehicle power-on state data. 10. A fuel cell vehicle, characterized by comprising the vehicle hydrogenation control system of claim 9.

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