Vehicle fuel cell starting method, device and equipment

Abstract

Embodiments of the present application disclose a vehicle fuel cell starting method, device and equipment, the residual power of the power battery is acquired, and the current driving speed of the vehicle is acquired when the residual power of the power battery is less than a first fuel-electricity starting threshold. When the current driving speed of the vehicle is greater than or equal to a preset vehicle speed, a fuel cell control unit is triggered to start the fuel cell to supply power to the vehicle. The fuel cell is started when the driving speed of the vehicle is at the preset vehicle speed, so that the extra generated electric power in the fuel cell starting process can be consumed, and the power-on and power-off of the power battery can be avoided frequently when the residual power of the power battery is less than the first fuel-electricity starting threshold under low-temperature working conditions, thereby avoiding frequent starting of the fuel cell and prolonging the service life of the fuel cell.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle fuel cell starting, in particular to a vehicle fuel cell starting method, device and equipment. BACKGROUND

[0002] When the vehicle starts under low-temperature working conditions, if the power battery power is greater than or equal to the fuel starting threshold, the vehicle starts and drives purely by electricity, and when the power battery power is lower than the fuel starting threshold, the fuel cell starts (and the existing fuel cell has only self-starting as a starting form). In the process of starting the fuel cell under the condition that the vehicle is stationary and low temperature, additional electric power is generated, but at this time the battery pack temperature is low and charging cannot be performed, and the vehicle is currently in a stationary state and cannot be utilized, thus resulting in that the additional electric power generated in the process of starting the fuel cell cannot be consumed.

[0003] Therefore, how to consume the additional electric power generated in the process of starting the fuel cell is a technical problem that those skilled in the art urgently need to solve. SUMMARY

[0004] Therefore, the embodiments of the present application provide a vehicle fuel cell starting method, device and equipment to improve the accuracy of vehicle fuel cell starting.

[0005] To solve the above problems, the technical solutions provided by the embodiments of the present application are as follows:

[0006] A vehicle fuel cell starting method, the method comprising:

[0007] obtaining the remaining power of the power battery;

[0008] in response to the remaining power of the power battery being less than a first fuel starting threshold, obtaining the current vehicle speed;

[0009] in response to the current vehicle speed being greater than or equal to a preset vehicle speed, triggering a fuel cell control unit to start the fuel cell.

[0010] In some possible implementation manners, the method further comprises:

[0011] in response to the remaining power of the power battery being less than a second fuel starting threshold and greater than a third fuel starting threshold, triggering the fuel cell control unit to start the fuel cell.

[0012] In some possible implementation manners, the method further comprises:

[0013] in response to the remaining power of the power battery being less than the third fuel starting threshold, outputting a reminder.

[0014] In some possible implementation manners, the method further comprises:

[0015] in response to the current vehicle speed being less than the preset vehicle speed, obtaining a liquid temperature at an inlet of a fuel cell stack;

[0016] in response to the liquid temperature at the inlet of the fuel cell stack being higher than a preset temperature, performing the obtaining of the current vehicle speed;

[0017] in response to the liquid temperature at the inlet of the fuel cell stack being lower than the preset temperature, triggering a fuel cell control unit to heat liquid flowing into the fuel cell stack so that the liquid temperature at the inlet of the fuel cell stack is higher than the preset temperature, and performing the obtaining of the current vehicle speed.

[0018] In some possible implementation manners, the method further includes:

[0019] in response to the current vehicle speed being greater than or equal to the preset vehicle speed, obtaining a liquid temperature at an inlet of a fuel cell stack;

[0020] in response to the liquid temperature at the inlet of the fuel cell stack being higher than or equal to a preset temperature, triggering a fuel cell control unit to start the fuel cell at normal temperature;

[0021] in response to the liquid temperature at the inlet of the fuel cell stack being lower than the preset temperature, triggering the fuel cell control unit to start the fuel cell at low temperature.

[0022] In some possible implementation manners, the method further includes:

[0023] in response to the liquid temperature at the inlet of the fuel cell stack being lower than the preset temperature, triggering a fuel cell control unit to heat liquid in a fuel cell cooling loop;

[0024] obtaining a liquid temperature of the fuel cell cooling loop;

[0025] in response to the liquid temperature of the fuel cell cooling loop being higher than or equal to a preset temperature, triggering the fuel cell control unit to start the fuel cell at normal temperature.

[0026] In some possible implementation manners, the method further includes:

[0027] in response to the liquid temperature at the inlet of the fuel cell stack being lower than the preset temperature, triggering a fuel cell control unit to heat liquid flowing into the fuel cell stack so that the liquid temperature at the inlet of the fuel cell stack is higher than or equal to the preset temperature;

[0028] triggering the fuel cell control unit to start the fuel cell at normal temperature.

[0029] A vehicle fuel cell starting device, the device comprising:

[0030] The first obtaining unit is configured to obtain the residual power of the power battery.

[0031] The second obtaining unit is configured to obtain the current driving speed of the vehicle in response to the residual power of the power battery being less than the first fuel-electricity starting threshold.

[0032] The first triggering unit is configured to trigger the fuel cell control unit to start the fuel cell in response to the current driving speed of the vehicle being greater than or equal to the preset vehicle speed.

[0033] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the vehicle fuel cell starting method as described above when executing the computer program.

[0034] A computer readable storage medium stores instructions, and the instructions, when executed on a terminal device, cause the terminal device to perform the vehicle fuel cell starting method as described above.

[0035] Compared with the prior art, the present application has the following beneficial effects:

[0036] The present application provides a vehicle fuel cell starting method, device and equipment. Specifically, when the vehicle fuel cell starting method provided by the embodiment of the present application is executed, the residual power of the power battery can be obtained first. Then, when the residual power of the power battery is less than the first fuel-electricity starting threshold, the current driving speed of the vehicle is obtained. Finally, when the current driving speed of the vehicle is greater than or equal to the preset vehicle speed, the fuel cell control unit is triggered to start the fuel cell. The present application starts the fuel cell when the current driving speed of the vehicle is at the preset vehicle speed, which can consume the additional electric power generated during the starting process of the fuel cell, and at the same time, avoids the frequent start-stop of the fuel cell when the residual power of the power battery is less than the first fuel-electricity starting threshold under low-temperature working conditions, thereby prolonging the service life of the fuel cell. BRIEF DESCRIPTION OF DRAWINGS

[0037] To make the technical solutions in the embodiments or the prior art clearer, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0038] Figure 1 A schematic diagram of an exemplary application scenario provided by the embodiment of the present application;

[0039] Figure 2 A method flowchart of a vehicle fuel cell starting method provided by the embodiment of the present application;

[0040] Figure 3 A structural schematic diagram of a vehicle fuel cell starting device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0042] In order to facilitate the understanding of the technical solutions provided by the embodiments of the present application, the background art related to the embodiments of the present application will be described first.

[0043] With the current global resources becoming increasingly scarce and the environment becoming increasingly polluted, environmental protection has become a topic of concern for various industries, and the automobile industry is no exception. Automobile manufacturers and parts developers at home and abroad are increasingly concerned about whether a fuel that can protect the environment and save resources will be applied to automobiles. Therefore, hydrogen fuel cells, as a clean, efficient, and pollution-free electrochemical power generation device, have received widespread attention at home and abroad. At the same time, hydrogen fuel cell vehicles have become the mainstream of the current automobile industry. Therefore, the safety and economy of fuel cell vehicles have become a topic of concern for various automobile enterprises.

[0044] When the vehicle starts at low temperature, if the power battery power is greater than or equal to the fuel starting threshold, the vehicle starts and drives purely by electricity. When the power battery power is lower than the fuel starting threshold, the fuel cell is started (and the existing fuel cell has only a self-starting form). In the process of starting the fuel cell under the condition that the vehicle is stationary and the temperature is low, additional electric power is generated, but at this time the battery pack temperature is low and charging cannot be performed, and the vehicle is currently in a stationary state and cannot be utilized, thus resulting in the additional electric power generated in the process of starting the fuel cell being unable to be consumed.

[0045] To solve this problem, the application provides a vehicle fuel cell starting method, device and equipment. The residual power of the power battery is acquired first, and the current driving speed of the vehicle is acquired when the residual power of the power battery is less than a first fuel-electricity starting threshold. When the current driving speed of the vehicle is greater than or equal to a preset vehicle speed, the fuel cell control unit is triggered to start the fuel cell to supply power to the vehicle. The fuel cell is started when the driving speed of the vehicle is at the preset vehicle speed, so that the extra power consumption generated in the fuel cell starting process is consumed, and the power-on and power-off of the power battery are avoided when the residual power of the power battery is less than the first fuel-electricity starting threshold under low-temperature working conditions, thereby avoiding frequent starting of the fuel cell and prolonging the service life of the fuel cell.

[0046] To facilitate understanding of the vehicle fuel cell starting method provided by the application, the following describes the application in conjunction with the scenario examples shown in the accompanying drawings. Figure 1 Figure 1 The figure is a framework schematic diagram of an example application scenario provided by the application.

[0047] First, the residual power of the power battery is acquired, which can be understood as the current usable power in the power battery. The current driving speed of the vehicle is acquired when the residual power of the power battery is less than a first fuel-electricity starting threshold, which can be understood as the upper limit power of the power battery when starting the fuel cell. When the current driving speed of the vehicle is greater than or equal to a preset vehicle speed, the fuel cell control unit is triggered to start the fuel cell. The fuel cell is started when the driving speed of the vehicle is at the preset vehicle speed, so that the extra power consumption generated in the fuel cell starting process is consumed, and the power-on and power-off of the power battery are avoided when the residual power of the power battery is less than the first fuel-electricity starting threshold under low-temperature working conditions, thereby avoiding frequent starting of the fuel cell and prolonging the service life of the fuel cell.

[0048] Those skilled in the art can understand that the framework schematic diagram shown in the accompanying drawings is only one example in which the embodiments of the application can be implemented. The application scope of the embodiments of the application is not limited by any aspect of the framework. Figure 1

[0049] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0050] Figure 2 The figure is a method flowchart of a vehicle fuel cell starting method provided by the application, as shown in Figure 2 ​​​As shown, the vehicle fuel cell starting method can include steps S201-S203:

[0051] S201: Obtain the remaining power of the power battery.

[0052] In order to start the fuel cell of the vehicle, the central controller can first obtain the remaining power of the power battery.

[0053] In some possible implementations, the power battery can be, but is not limited to, a power source that provides a power source for a tool, such as a battery that provides power for an electric vehicle, an electric train, an electric bicycle, and a golf cart.

[0054] In some possible implementations, the remaining power of the power battery can be, but is not limited to, the current available power in the power battery.

[0055] S202: In response to the remaining power of the power battery being less than a first fuel-electric starting threshold, obtain the current driving speed of the vehicle.

[0056] After obtaining the remaining power of the power battery, when the remaining power of the power battery is less than the first fuel-electric starting threshold, the central controller needs to obtain the current driving speed of the vehicle.

[0057] In some possible implementations, the first fuel-electric starting threshold can be, but is not limited to, an upper limit of the power battery when starting the fuel cell. The first fuel-electric starting threshold can be set according to actual conditions, and is generally set to 80% SOC. The present application does not make specific limitations on the first fuel-electric starting threshold. Wherein, SOC is the abbreviation of state-of-charge, SOC refers to the state-of-charge of the battery, also known as the remaining capacity, indicating the ability of the battery to continue to work. The following is a specific explanation of SOC:

[0058] 1. SOC is generally the ratio of the charging capacity to the rated capacity, expressed in percentage. A battery generally has a rated capacity, and can obtain a charging capacity under a certain rate for a certain time. The ratio of this capacity to the rated capacity is the SOC. Its value range is 0-1, when SOC=0, it means that the battery is completely discharged, and when SOC=1, it means that the battery is fully charged.

[0059] 2. The battery SOC cannot be directly measured, but can only be estimated by the battery terminal voltage, charging and discharging current, and internal resistance.

[0060] In some possible implementations, the current driving speed of the vehicle can be, but is not limited to, the speed at which the vehicle is currently driving at this moment.

[0061] S203: In response to the current driving speed of the vehicle being greater than or equal to a preset vehicle speed, triggering the fuel cell control unit to start the fuel cell.

[0062] After obtaining the current driving speed of the vehicle, the central controller needs to trigger the fuel cell control unit when the current driving speed of the vehicle remains at a certain speed, i.e., greater than or equal to the preset vehicle speed, so that the fuel cell control unit starts the fuel cell.

[0063] In some possible implementations, the preset vehicle speed can be, but is not limited to, the minimum vehicle speed at which the fuel cell can generate additional electric energy. The preset vehicle speed can be set according to actual conditions, and is generally set to 2 km / h. The preset vehicle speed is not limited in the present application.

[0064] In some possible implementations, the fuel cell control unit (FCU) is a key component of the fuel cell electric vehicle transmission system, responsible for the overall process control of the entire fuel cell system. This process includes supervision of hydrogen and air treatment, heat and water management, energy conversion, while meeting all safety and security requirements. To ensure continuous satisfaction of these load and heat requirements, close exchange between the fuel cell controller and the power system domain controller must be achieved.

[0065] In some possible implementations, the fuel cell can be, but is not limited to, a hydrogen fuel cell. The hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electric energy. However, its essence is the reverse reaction of water electrolysis, which supplies hydrogen and oxygen to the anode and cathode respectively. After the hydrogen diffuses outward through the anode and reacts with the electrolyte, the electrons are emitted to the cathode through the external load. It is suitable for aerospace energy and automotive energy, etc., and has the characteristics of no pollution, no noise and high efficiency. The working principle is that hydrogen gas is sent to the anode plate of the fuel cell, and after catalysis, the electrons in the hydrogen atom are separated. The hydrogen ions lose electrons and reach the cathode plate of the fuel cell. The separated electrons reach the cathode plate through the external circuit, thereby generating electric current. The hydrogen ions lose electrons and combine with oxygen atoms to become water again when they reach the cathode plate. Therefore, continuous supply of hydrogen to the anode plate and air to the cathode plate, and timely removal of water, can continuously generate electric energy, which is then converted into kinetic energy through a series of electric energy transmission and conversion.

[0066] In some possible implementations, the method further includes: in response to the remaining power of the power battery being less than a second fuel-electric starting threshold and greater than a third fuel-electric starting threshold, triggering the fuel cell control unit to start the fuel cell.

[0067] When the remaining power of the power battery is less than the second fuel-electric starting threshold and greater than the third fuel-electric starting threshold, the central controller can directly trigger the fuel cell control unit without obtaining the current driving speed of the vehicle, thereby starting the fuel cell.

[0068] In some possible implementation manners, the second fuel-electric starting threshold value can be, but is not limited to, an upper limit of the power battery when the fuel cell is directly started without obtaining the driving speed of the current vehicle. The second fuel-electric starting threshold value can be set according to actual conditions, and is generally set to 15% SOC. The application does not make specific limitations on the second fuel-electric starting threshold value. The third fuel-electric starting threshold value can be, but is not limited to, a lower limit of the power battery when the fuel cell is directly started without obtaining the driving speed of the current vehicle. The third fuel-electric starting threshold value can be set according to actual conditions, and is generally set to 5% SOC. The application does not make specific limitations on the third fuel-electric starting threshold value.

[0069] In some possible implementation manners, the method further includes:

[0070] outputting a reminder in response to the remaining power of the power battery being less than the third fuel-electric starting threshold value.

[0071] When the remaining power of the power battery is less than the third fuel-electric starting threshold value, the power battery of the vehicle is in a very low power state. At this time, the central controller outputs a reminder to prompt the user that the power is low, and at this time, the user should prioritize charging.

[0072] In some possible implementation manners, the second fuel-electric starting threshold value can be, but is not limited to, an upper limit of the power battery when the fuel cell is directly started without obtaining the driving speed of the current vehicle. The second fuel-electric starting threshold value can be set according to actual conditions, and is generally set to 15% SOC. The application does not make specific limitations on the second fuel-electric starting threshold value. The third fuel-electric starting threshold value can be, but is not limited to, a lower limit of the power battery when the fuel cell is directly started without obtaining the driving speed of the current vehicle. The third fuel-electric starting threshold value can be set according to actual conditions, and is generally set to 5% SOC. The application does not make specific limitations on the third fuel-electric starting threshold value.

[0073] In some possible implementation manners, the reminder can be, but is not limited to, prompting the user that the power is low, and at this time, the user should prioritize charging. The reminder can only prompt the user that the power of the power battery is too low and should be charged in time. The application does not make specific limitations on the reminder. In addition, the application does not make specific limitations on the form of the reminder, which can be a voice form reminder or a display screen form reminder.

[0074] In some possible implementation manners, the method further includes A1-A3:

[0075] A1: obtaining a liquid temperature at a fuel cell stack inlet in response to the current driving speed of the vehicle being less than a preset vehicle speed.

[0076] After obtaining the current driving speed of the vehicle, when the current driving speed of the vehicle is less than the preset vehicle speed, the central controller needs to obtain the liquid temperature at the inlet of the fuel cell stack at this time.

[0077] A2: In response to the liquid temperature at the inlet of the fuel cell stack being higher than the preset temperature, the current driving speed of the vehicle is obtained.

[0078] When the vehicle starts the fuel cell startup process in a low-temperature working condition, the fuel cell will generate additional electric energy, but at this time the vehicle is in a low-speed driving or completely stationary state and cannot consume the above-mentioned electric energy. At the same time, because the temperature is too low, the fuel cell cannot be charged, so the above-mentioned electric energy cannot be consumed through the fuel cell. Therefore, after obtaining the liquid temperature at the inlet of the fuel cell stack, before starting the fuel cell, the liquid temperature at the inlet of the fuel cell stack needs to be higher than the preset temperature at this time. The power battery can be charged, that is, the additional electric energy generated by the fuel cell during the fuel cell startup process can be consumed. At this time, the central controller continues to obtain the current driving speed, and when the current driving speed of the vehicle is greater than or equal to the preset vehicle speed, the fuel cell control unit is triggered to start the fuel cell.

[0079] In some possible implementations, the preset temperature can be the minimum temperature of the liquid at the inlet of the fuel cell stack when the fuel cell charges the power battery. The preset temperature can be set according to actual conditions, and is generally set to 5℃. The preset temperature is not limited in the present application.

[0080] A3: In response to the liquid temperature at the inlet of the fuel cell stack being lower than the preset temperature, the fuel cell control unit is triggered to heat the liquid flowing into the fuel cell stack to make the liquid temperature at the inlet of the fuel cell stack higher than the preset temperature, and the current driving speed of the vehicle is obtained.

[0081] When the vehicle starts the fuel cell startup process in a low-temperature working condition, the fuel cell will generate additional electric energy, but at this time the vehicle is in a low-speed driving or completely stationary state and cannot consume the above-mentioned electric energy. At the same time, because the temperature is too low, the fuel cell cannot be charged, so the above-mentioned electric energy cannot be consumed through the fuel cell. Therefore, when the liquid temperature at the inlet of the fuel cell stack is lower than the preset temperature, the liquid at the inlet of the fuel cell stack is heated to be higher than the preset temperature, and the current driving speed is continuously obtained to execute the subsequent steps.

[0082] In some possible implementations, the method further includes B1-B2:

[0083] B1: In response to the current driving speed of the vehicle being greater than or equal to the preset vehicle speed, the liquid temperature at the inlet of the fuel cell stack is obtained.

[0084] When the vehicle's current speed is greater than or equal to a preset speed, and the liquid temperature at the fuel cell stack inlet is higher than or equal to a preset temperature, different starting strategies apply to the vehicle. Therefore, when the vehicle's current speed is greater than or equal to a preset speed, the central controller needs to obtain the liquid temperature at the fuel cell stack inlet to implement different starting methods based on the liquid temperature at the fuel cell stack inlet.

[0085] In some possible implementations, the preset temperature can be the lowest temperature of the liquid at the fuel cell stack inlet when the fuel cell charges the power battery. The preset temperature can be set according to actual conditions, and is generally set to 5°C. This application does not impose a specific limitation on the preset temperature.

[0086] B2: In response to the inlet liquid temperature of the fuel cell stack being higher than or equal to a preset temperature, the fuel cell control unit is triggered to start the fuel cell at room temperature.

[0087] When the vehicle's current speed is greater than or equal to the preset speed, and when the liquid temperature at the fuel cell stack inlet is higher than or equal to the preset temperature, there are different start-up strategies. When the liquid temperature at the fuel cell stack inlet is higher than or equal to the preset temperature, for some vehicles, the central controller needs to trigger the fuel cell control unit to start the fuel cell at room temperature.

[0088] B3: In response to the inlet liquid temperature of the fuel cell stack being lower than a preset temperature, the fuel cell control unit is triggered to start the fuel cell at low temperature.

[0089] When the vehicle's current speed is greater than or equal to the preset speed, and the liquid temperature at the fuel cell stack inlet is higher than or equal to the preset temperature, there are different start-up strategies. When the liquid temperature at the fuel cell stack inlet is lower than the preset temperature, some start-up strategies require the central controller to trigger the fuel cell control unit to start the fuel cell at low temperatures.

[0090] In some possible implementations, the method further includes C1-C3:

[0091] C1: In response to the inlet liquid temperature of the fuel cell stack being lower than the preset temperature, the fuel cell control unit is triggered to heat the liquid in the fuel cell cooling circuit.

[0092] When the vehicle's current speed is greater than or equal to a preset speed, the fuel cell cooling circuit liquid can be heated to a temperature higher than a preset temperature. This allows the fuel cell stack to enter normal temperature operation within a short period of time from a low-temperature state. Therefore, when the fuel cell stack inlet liquid temperature is lower than the preset temperature, the central controller needs to trigger the fuel cell control unit to heat the fuel cell cooling circuit liquid.

[0093] In some possible implementation manners, the preset temperature can be the minimum temperature of the fuel cell stack inlet liquid when the fuel cell charges the power battery. The preset temperature can be set according to actual conditions, and is generally set to 5 ℃. The preset temperature is not limited in the present application.

[0094] C2: obtaining the fuel cell cooling loop liquid temperature.

[0095] The fuel cell stack can enter the normal temperature start-up in a short time in the low temperature state only when the fuel cell cooling loop liquid is heated to be higher than the preset temperature. Therefore, after triggering the fuel cell control unit to heat the fuel cell cooling loop liquid, the central controller also needs to obtain the fuel cell cooling loop liquid temperature to determine whether the fuel cell cooling loop liquid temperature reaches the standard of making the fuel cell stack enter the normal temperature start-up in a short time in the low temperature state.

[0096] C3: triggering the fuel cell control unit to start the fuel cell in the normal temperature in response to the fuel cell cooling loop liquid temperature being higher than or equal to the preset temperature.

[0097] After the fuel cell cooling loop liquid temperature is heated to be higher than or equal to the preset temperature, the fuel cell control unit is triggered to start the fuel cell.

[0098] In some possible implementation manners, the method further includes D1-D2:

[0099] D1: triggering the fuel cell control unit to heat the liquid flowing into the fuel cell stack to make the fuel cell stack inlet liquid temperature higher than or equal to the preset temperature in response to the fuel cell stack inlet liquid temperature being lower than the preset temperature.

[0100] When the current driving speed of the vehicle is greater than or equal to the preset vehicle speed, the liquid flowing into the fuel cell stack can also be heated to make the liquid flowing into the fuel cell stack higher than the preset temperature. At this time, the extra electric energy generated in the fuel cell start-up process can be consumed in the driving process of the vehicle, and can also be consumed by charging the fuel cell, so that the extra electric energy generated in the fuel cell start-up process can be completely consumed.

[0101] In some possible implementation manners, the preset temperature can be the minimum temperature of the fuel cell stack inlet liquid when the fuel cell charges the power battery. The preset temperature can be set according to actual conditions, and is generally set to 5 ℃. The preset temperature is not limited in the present application.

[0102] D2: triggering the fuel cell control unit to start the fuel cell.

[0103] After the fuel cell stack inlet liquid temperature is heated to be higher than or equal to the preset temperature, the central controller needs to trigger the fuel cell control unit to start the fuel cell.

[0104] Based on the content of S201-S203, first, the remaining power of the power battery is acquired, and the current driving speed of the vehicle is acquired when the remaining power of the power battery is less than the first fuel-electricity starting threshold. Then, when the current driving speed of the vehicle is greater than or equal to the preset vehicle speed, the fuel cell control unit is triggered to start the fuel cell to supply energy to the vehicle. The fuel cell is started when the driving speed of the vehicle is the preset vehicle speed in the present application, the extra generated electric power in the fuel cell starting process can be consumed, and at the same time, the power-on and power-off of the power battery under the low-temperature working condition can be avoided when the remaining power of the power battery is less than the first fuel-electricity starting threshold, so that the fuel cell is prevented from being frequently started, and the service life of the fuel cell is prolonged.

[0105] The above is some specific implementation manners of the vehicle fuel cell starting method provided by the embodiments of the present application, based on which, the present application further provides a corresponding vehicle fuel cell starting device. The device provided by the embodiments of the present application will be introduced from the functional modularization.

[0106] Referring to Figure 3 , the figure is a structural schematic diagram of a vehicle fuel cell starting device provided by an embodiment of the present application. As Figure 3 shown, the vehicle fuel cell starting device comprises:

[0107] A first acquisition unit 301 is configured to acquire the remaining power of the power battery.

[0108] In some possible implementation manners, the power battery can be, but is not limited to, a power supply providing a power source for a tool, such as a storage battery providing power for an electric vehicle, an electric train, an electric bicycle, and a golf cart.

[0109] In some possible implementation manners, the remaining power of the power battery can be, but is not limited to, the current available electric energy in the power battery.

[0110] A second acquisition unit 302 is configured to acquire the current driving speed of the vehicle in response to the remaining power of the power battery being less than the first fuel-electricity starting threshold.

[0111] In some possible implementation manners, the first fuel-electricity starting threshold value can be, but is not limited to, an upper limit of the power battery when starting the fuel cell. The first fuel-electricity starting threshold value can be set according to actual conditions, and is generally set to 80% SOC. The application does not make a specific limitation on the first fuel-electricity starting threshold value. Wherein, SOC is the abbreviation of state-of-charge, and SOC refers to the state of charge of the automobile battery, also known as the remaining capacity, indicating the ability of the battery to continue to work. The following is a specific explanation of SOC:

[0112] 1. SOC is generally the ratio of the charging capacity to the rated capacity, expressed in percentage. A battery generally has a rated capacity, and can obtain a charging capacity under a certain rate after being charged for a certain time. The ratio of the capacity to the rated capacity is SOC. The value range is 0-1. When SOC=0, it indicates that the battery is completely discharged, and when SOC=1, it indicates that the battery is fully charged.

[0113] 2. The battery SOC cannot be directly measured, but can be estimated by parameters such as battery terminal voltage, charging and discharging current, and internal resistance.

[0114] In some possible implementation manners, the current vehicle speed can be, but is not limited to, the speed at which the vehicle is currently running at this moment.

[0115] The first triggering unit 303, in response to the current vehicle speed being greater than or equal to the preset vehicle speed, triggers the fuel cell control unit to start the fuel cell.

[0116] In some possible implementation manners, the preset vehicle speed can be, but is not limited to, the minimum speed of the vehicle that can consume the additional generated electric energy of the fuel cell. The preset vehicle speed can be set according to actual conditions, and is generally set to 2Km / h. The application does not make a specific limitation on the preset vehicle speed.

[0117] In some possible implementation manners, the fuel cell control unit FCCU (Fuel Cell Control Unit, FCCU) is a key component of the fuel cell electric vehicle transmission system, responsible for the overall process control of the entire fuel cell system. This process includes: supervision of hydrogen and air treatment, heat and water management, energy conversion, while meeting all safety and security requirements. In order to ensure continuous satisfaction of these load and heat requirements, close exchange between the fuel cell controller and the power system domain controller must be achieved.

[0118] In some possible implementation manners, the fuel cell can be, but is not limited to, a hydrogen fuel cell. The hydrogen fuel cell is a power generation device that directly converts chemical energy of hydrogen and oxygen into electric energy, but its essence is the reverse reaction of water electrolysis, and hydrogen and oxygen are supplied to the anode and the cathode respectively. After the hydrogen diffuses outward through the anode and reacts with the electrolyte, the electrons are emitted to the cathode through an external load, which is suitable for space energy and automobile energy, and has the characteristics of no pollution, no noise and high efficiency. The working principle is that hydrogen is sent to the anode plate of the fuel cell, and after catalysis, the electrons in the hydrogen atom are separated, the hydrogen ions lose electrons, reach the cathode plate of the fuel cell, and the separated electrons reach the cathode plate of the fuel cell through an external circuit, thereby generating electric current. The hydrogen ions lose electrons and combine with oxygen atoms to become water again after reaching the cathode plate. Therefore, as long as the hydrogen is continuously supplied to the anode plate and the air is continuously supplied to the cathode plate, and the water is removed in time, electric energy can be continuously generated. After a series of electric energy transmission and conversion, the electric energy is converted into kinetic energy.

[0119] In a possible implementation manner, the device further includes:

[0120] The second triggering unit is configured to trigger the fuel cell control unit to start the fuel cell in response to the remaining power of the power battery being less than a second fuel-electricity starting threshold and greater than a third fuel-electricity starting threshold.

[0121] In some possible implementation manners, the second fuel-electricity starting threshold can be, but is not limited to, an upper limit of the power battery when the fuel cell is directly started without obtaining the driving speed of the current vehicle. The second fuel-electricity starting threshold can be set according to actual conditions, and is generally set to 15% SOC. The application does not make a specific limitation on the second fuel-electricity starting threshold. The third fuel-electricity starting threshold can be, but is not limited to, a lower limit of the power battery when the fuel cell is directly started without obtaining the driving speed of the current vehicle. The third fuel-electricity starting threshold can be set according to actual conditions, and is generally set to 5% SOC. The application does not make a specific limitation on the third fuel-electricity starting threshold.

[0122] In a possible implementation manner, the device further includes:

[0123] The output unit is configured to output a reminder in response to the remaining power of the power battery being less than the third fuel-electricity starting threshold.

[0124] In some possible implementation manners, the reminder can be, but is not limited to, a prompt that the user should charge the power battery as the power battery is low. The reminder can only prompt the user to charge the power battery in time as the power battery is too low. The application does not make a specific limitation on the reminder. In addition, the application does not make a specific limitation on the form of the reminder. The reminder can be in the form of voice or through a display screen.

[0125] In a possible implementation, the apparatus further includes:

[0126] a third obtaining unit, configured to obtain the liquid temperature at the fuel cell stack inlet in response to the current vehicle driving speed being less than the preset vehicle speed.

[0127] an executing unit, configured to execute the obtaining of the current vehicle driving speed in response to the liquid temperature at the fuel cell stack inlet being higher than the preset temperature.

[0128] In some possible implementations, the preset temperature can be the minimum temperature of the liquid at the fuel cell stack inlet when the fuel cell is charged by the power battery. The preset temperature can be set according to actual conditions, and is generally set to 5 ℃. The preset temperature is not limited in the present application.

[0129] a fuel cell control unit, configured to heat the liquid flowing into the fuel cell stack to make the liquid temperature at the fuel cell stack inlet higher than the preset temperature, and trigger the second obtaining unit 302 to obtain the current vehicle driving speed in response to the liquid temperature at the fuel cell stack inlet being lower than the preset temperature.

[0130] a fourth obtaining unit, configured to obtain the current vehicle driving speed in response to the liquid temperature being lower than the preset temperature.

[0131] In a possible implementation, the apparatus further includes:

[0132] a fifth obtaining unit, configured to obtain the liquid temperature at the fuel cell stack inlet in response to the current vehicle driving speed being greater than or equal to the preset vehicle speed.

[0133] In some possible implementations, the preset temperature can be the minimum temperature of the liquid at the fuel cell stack inlet when the fuel cell can be charged. The preset temperature can be set according to actual conditions, and is generally set to 5 ℃. The preset temperature is not limited in the present application.

[0134] a third triggering unit, configured to trigger the fuel cell control unit to start the fuel cell at normal temperature in response to the liquid temperature at the fuel cell stack inlet being higher than or equal to the preset temperature.

[0135] a fourth triggering unit, configured to trigger the fuel cell control unit to start the fuel cell at low temperature in response to the liquid temperature at the fuel cell stack inlet being lower than the preset temperature.

[0136] In a possible implementation, the apparatus further includes:

[0137] a fifth triggering unit, configured to trigger the fuel cell control unit to heat the liquid in the fuel cell cooling loop in response to the liquid temperature at the fuel cell stack inlet being lower than the preset temperature.

[0138] In some possible implementation manners, the preset temperature can be a minimum temperature of the fuel cell stack inlet liquid when the fuel cell charges the power battery. The preset temperature can be set according to actual conditions, and is generally set to 5 ℃. The preset temperature is not limited in the present application.

[0139] The sixth obtaining unit is configured to obtain the fuel cell cooling loop liquid temperature.

[0140] The sixth triggering unit is configured to trigger the fuel cell control unit to start the fuel cell at a normal temperature in response to the fuel cell cooling loop liquid temperature being higher than or equal to the preset temperature.

[0141] In a possible implementation manner, the device further includes:

[0142] The seventh triggering unit is configured to trigger the fuel cell control unit to heat the liquid flowing into the fuel cell stack to make the fuel cell stack inlet liquid temperature higher than or equal to the preset temperature in response to the fuel cell stack inlet liquid temperature being lower than the preset temperature.

[0143] The eighth triggering unit is configured to trigger the fuel cell control unit to start the fuel cell.

[0144] In addition, the embodiments of the present application further provide a vehicle fuel cell starting device, which includes a memory and a processor. The memory is configured to store programs or codes. The processor is configured to run the programs or codes stored in the memory to implement the vehicle fuel cell starting method described above.

[0145] In addition, the embodiments of the present application further provide a computer readable storage medium, characterized in that the computer readable storage medium stores codes. When the codes are run, a device running the codes implements the vehicle fuel cell starting method described above.

[0146] The embodiments of the present application provide a vehicle fuel cell starting device. After the first obtaining unit 301 obtains the residual power of the power battery, the second obtaining unit 302 obtains the current driving speed of the vehicle when the residual power of the power battery is less than the first fuel-electricity starting threshold. The first triggering unit 303 triggers the fuel cell control unit to start the fuel cell when the current driving speed of the vehicle is greater than or equal to a preset vehicle speed. The present application starts the fuel cell when the current driving speed of the vehicle is at the preset vehicle speed, so that the additional electric power consumption generated in the fuel cell starting process can be consumed, and the frequent start-stop of the fuel cell when the residual power of the power battery is less than the first fuel-electricity starting threshold in the low-temperature working condition of the vehicle is avoided, thereby prolonging the service life of the fuel cell.

[0147] The vehicle fuel cell starting method, system, device and storage medium provided by the present application are described in detail above. The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be understood by referring to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be understood by referring to the method part. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0148] It should be understood that in the present application, "at least one" means one or more, and "multiple" means two or more. "And / or" is used to describe the association between the associated objects, which means that there can be three relationships, for example, "A and / or B" can represent three cases: only A, only B, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b or c can mean a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0149] It should also be noted that in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a…" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0150] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in random access memory (RAM), flash memory, read-only memory (ROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and

[0151] The above description of disclosed embodiments is intended to be illustrative and not restrictive. Many embodiments of the application will be apparent to those of skill in the art upon reviewing the above description. The scope of the application should, therefore, be determined not with reference to the above description, but instead should be given with reference to the appended claims, along with their full scope of equivalents.

Claims

1. A method of starting a vehicle fuel cell, characterized by, The method comprises: acquiring the residual power of the power battery; in response to the residual power of the power battery being less than a first fuel-electric starting threshold, acquiring the current driving speed of the vehicle; in response to the current driving speed of the vehicle being greater than or equal to a preset vehicle speed, triggering the fuel cell control unit to start the fuel cell; The method further comprises: in response to the current driving speed of the vehicle being less than the preset vehicle speed, acquiring the liquid temperature at the inlet of the fuel cell stack; in response to the liquid temperature at the inlet of the fuel cell stack being higher than a preset temperature, performing the acquisition of the current driving speed of the vehicle; in response to the liquid temperature at the inlet of the fuel cell stack being lower than the preset temperature, triggering the fuel cell control unit to heat the liquid flowing into the fuel cell stack to make the liquid temperature at the inlet of the fuel cell stack higher than the preset temperature, and performing the acquisition of the current driving speed of the vehicle; The method further comprises: in response to the current driving speed of the vehicle being greater than or equal to the preset vehicle speed, acquiring the liquid temperature at the inlet of the fuel cell stack; in response to the liquid temperature at the inlet of the fuel cell stack being higher than or equal to the preset temperature, triggering the fuel cell control unit to start the fuel cell at normal temperature; in response to the liquid temperature at the inlet of the fuel cell stack being lower than the preset temperature, triggering the fuel cell control unit to start the fuel cell at low temperature.

2. The method of claim 1, wherein, The method further comprises: in response to the residual power of the power battery being less than a second fuel-electric starting threshold and greater than a third fuel-electric starting threshold, triggering the fuel cell control unit to start the fuel cell.

3. The method of claim 1, wherein, The method further comprises: in response to the residual power of the power battery being less than the third fuel-electric starting threshold, outputting a reminder.

4. The method of claim 1, wherein, The method further comprises: in response to the liquid temperature at the inlet of the fuel cell stack being lower than the preset temperature, triggering the fuel cell control unit to heat the liquid in the fuel cell cooling loop; acquiring the liquid temperature of the fuel cell cooling loop; in response to the liquid temperature of the fuel cell cooling loop being higher than or equal to the preset temperature, triggering the fuel cell control unit to start the fuel cell at normal temperature.

5. The method of claim 1, wherein, The method further comprises: in response to the liquid temperature at the inlet of the fuel cell stack being lower than the preset temperature, triggering the fuel cell control unit to heat the liquid flowing into the fuel cell stack to make the liquid temperature at the inlet of the fuel cell stack higher than or equal to the preset temperature; triggering the fuel cell control unit to start the fuel cell at normal temperature.

6. A vehicle fuel cell starting apparatus characterized by comprising: The device comprises: a first acquisition unit for acquiring the residual power of the power battery; a second acquisition unit, in response to the residual power of the power battery being less than a first fuel-electric starting threshold, for acquiring the current driving speed of the vehicle; a first triggering unit, in response to the current driving speed of the vehicle being greater than or equal to a preset vehicle speed, for triggering the fuel cell control unit to start the fuel cell; The device further comprises: a third acquisition unit, in response to the current driving speed of the vehicle being less than the preset vehicle speed, for acquiring the liquid temperature at the inlet of the fuel cell stack; a performing unit, in response to the liquid temperature at the inlet of the fuel cell stack being higher than a preset temperature, for performing the acquisition of the current driving speed of the vehicle; The fuel cell control unit is configured to heat the liquid flowing into the fuel cell stack to make the liquid temperature at the fuel cell stack inlet higher than the preset temperature and trigger a second obtaining unit to obtain the current driving speed of the vehicle, in response to the liquid temperature at the fuel cell stack inlet being lower than the preset temperature. The device further comprises: A fifth obtaining unit configured to obtain the liquid temperature at the fuel cell stack inlet, in response to the current driving speed of the vehicle being greater than or equal to the preset vehicle speed. A third triggering unit configured to trigger the fuel cell control unit to start the fuel cell at normal temperature, in response to the liquid temperature at the fuel cell stack inlet being higher than or equal to the preset temperature. A fourth triggering unit configured to trigger the fuel cell control unit to start the fuel cell at low temperature, in response to the liquid temperature at the fuel cell stack inlet being lower than the preset temperature.

7. An electronic device, comprising: The computer readable storage medium stores instructions, and the instructions, when executed on a terminal device, cause the terminal device to perform the vehicle fuel cell starting method according to any one of claims 1-5. The computer readable storage medium stores instructions, and the instructions, when executed on a terminal device, cause the terminal device to perform the vehicle fuel cell starting method according to any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, ​

Images