A method, device, equipment and medium for over-temperature control of a fuel cell system

Abstract

The present invention relates to a method, device, equipment and medium for over-temperature control of a fuel cell system, and belongs to the technical field of over-temperature control of fuel cell systems. The method includes obtaining driving data of a vehicle during high-speed driving and road condition data of a target section to be driven within a preset distance in front of the vehicle. Based on the driving data and the road condition data to be driven, demand data of the fuel cell system can be obtained, so that the demand data can be judged. When the demand data meets the demand power condition, a target difference is obtained based on the driving data and the road condition data to be driven; when the target difference meets the discharge amount difference condition, the fuel cell system is over-temperature controlled, so that the temperature of the fuel cell system of the vehicle can be over-temperature controlled during high-speed driving, the temperature of the fuel cell system can be reduced, and the safety of the vehicle during driving can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of over-temperature control of fuel cell systems, and in particular to an over-temperature control method, device, equipment and medium for a fuel cell system. Background Art

[0002] In recent years, new energy vehicles have experienced rapid growth, with several countries announcing dates for banning the sale of fuel-powered vehicles. In China, guided by national and local policies, new energy vehicles have seen significant development. Hydrogen fuel cell vehicles, as a key component of new energy vehicles, have also seen rapid growth in recent years. Guided by the goals of achieving carbon peak and carbon neutrality, the number of hydrogen fuel cell vehicles on the road continues to increase. Fuel cell systems generate electricity through electrochemical reactions, which, together with the power battery system, provides energy to the main drive motor, thereby driving the vehicle.

[0003] With existing technologies, as fuel cell system power continues to increase, the need for heat dissipation in the vehicle is also increasing. When a vehicle is traveling at high speeds, insufficient heat dissipation can occur. This can cause the fuel cell system to heat up rapidly without sufficient heat dissipation, leading to vehicle failure.

[0004] Therefore, there is an urgent need to propose a fuel cell system over-temperature control method, device, equipment and medium to solve the technical problem in the prior art that when a car is driving at high speed, the heat dissipation power is insufficient, which causes the temperature of the fuel cell system to rise, leading to vehicle failure. Summary of the Invention

[0005] In view of this, it is necessary to provide a fuel cell system over-temperature control method, device, equipment and medium to solve the technical problem in the prior art that when a car is driving at high speed, the heat dissipation power is insufficient, which causes the temperature of the fuel cell system to rise, resulting in vehicle failure.

[0006] In order to solve the above problems, the present invention provides an over-temperature control method for a fuel cell system, comprising:

[0007] Acquiring driving data of the vehicle and road condition data of a target road section to be driven; the target road section is a road section to be driven within a preset distance in front of the vehicle;

[0008] Obtaining demand data of the fuel cell system according to the driving data and the road condition data to be driven;

[0009] When the demand data satisfies the demand power condition, obtaining a target difference value according to the driving data and the road condition data to be driven;

[0010] When the target difference satisfies a discharge amount difference condition, over-temperature control is performed on the fuel cell system.

[0011] In one possible implementation, the driving data includes basic vehicle data, the demand data includes battery power demand and heat dissipation demand, and obtaining the demand data of the fuel cell system based on the driving data and the road condition data to be driven includes:

[0012] Determining the energy consumption of the vehicle within the preset distance ahead based on the road condition data to be driven and the basic vehicle data;

[0013] Obtaining a battery power requirement of the fuel cell system according to the vehicle energy consumption, the road condition data to be driven, and the vehicle basic data;

[0014] The heat dissipation requirement of the fuel cell system is obtained according to the battery power requirement.

[0015] In one possible implementation, the vehicle includes a thermal management system, the driving data further includes battery data of a fuel cell system, the battery data includes maximum power, and after obtaining demand data of the fuel cell system based on the driving data and the road condition data to be driven, the method further includes:

[0016] Obtaining a thermal management power requirement of the thermal management system according to a heat dissipation requirement of the fuel cell system;

[0017] Obtaining a target power according to the battery required power and the thermal management required power;

[0018] Determining whether the target power is greater than the maximum power;

[0019] If not, adjusting the output power of the fuel cell system to the target power;

[0020] If so, it is determined that the demand data meets the required power condition.

[0021] In a possible implementation, the basic vehicle data includes vehicle speed, and obtaining a target difference value based on the driving data and the road condition data to be driven includes:

[0022] Obtaining a travel time for the vehicle to travel through the target road section based on the preset distance ahead, the vehicle speed, and the road condition data to be traveled;

[0023] Obtaining a target total energy consumption of the target road section according to the heat dissipation demand, the driving time, and the energy consumption of the entire vehicle;

[0024] Obtaining power generation of the fuel cell system according to the battery demand power and the driving time;

[0025] A target difference is obtained according to the power generation and the target total energy consumption.

[0026] In a possible implementation, obtaining the target total energy consumption of the target section according to the heat dissipation requirement, the driving time, and the vehicle energy consumption includes:

[0027] Obtaining a total energy consumption of the thermal management system according to the heat dissipation demand and the driving time;

[0028] The target total energy consumption of the target road section is obtained according to the whole vehicle energy consumption and the total energy consumption.

[0029] In one possible implementation, the basic vehicle data includes power of the power battery, current SOC, and minimum SOC. When the demand data satisfies the required power condition, before obtaining the target difference based on the driving data and the road condition data to be driven, the method includes:

[0030] Obtaining a maximum discharge capacity of the power battery according to the power battery power, the current SOC, and the minimum SOC;

[0031] determining whether the target difference is greater than or equal to the maximum discharge capacity of the power battery;

[0032] If not, controlling the fuel cell system to operate at maximum power;

[0033] If so, it is determined that the target difference satisfies the discharge amount difference condition.

[0034] In one possible implementation, the over-temperature control of the fuel cell system includes:

[0035] When the fuel cell system enters the over-temperature control mode, the upper temperature limits of the water inlet and outlet of the fuel cell system are set to a preset temperature value, the power of the thermal management system is set to a preset power, and the data of the vehicle is updated in real time to obtain an updated target difference value;

[0036] When the updated target difference satisfies the discharge amount difference condition, it is determined that the fuel cell system exits the over-temperature control mode, and the fuel cell system is controlled to operate at maximum power.

[0037] On the other hand, the present invention also provides an over-temperature control device for a fuel cell system, comprising:

[0038] A data acquisition module is used to acquire the vehicle's driving data and road condition data of a target road section to be driven; the target road section is a road section to be driven within a preset distance in front of the vehicle;

[0039] a demand determination module, configured to obtain demand data of the fuel cell system based on the driving data and the road condition data to be driven;

[0040] a difference calculation module, configured to obtain a target difference based on the driving data and the road condition data to be driven, when the demand data satisfies a demand power condition;

[0041] An over-temperature control module is used to perform over-temperature control on the fuel cell system when the target difference meets the discharge amount difference condition.

[0042] On the other hand, an embodiment of the present invention discloses an electronic device, comprising: a processor, a memory, and a computer program stored in the memory and capable of running on the processor. When the computer program is executed by the processor, the various steps of the above-mentioned fuel cell system over-temperature control method embodiment are implemented.

[0043] On the other hand, an embodiment of the present invention discloses a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the various steps of the above-mentioned embodiment of the over-temperature control method of the fuel cell system are implemented.

[0044] The beneficial effects of the present invention are: by obtaining the driving data of the vehicle during high-speed driving and the road condition data of the target section to be driven within a preset distance in front of the vehicle, the demand data of the fuel cell system can be obtained based on the driving data and the road condition data to be driven, so that the demand data can be judged, and when the demand data meets the demand power condition, the target difference is obtained based on the driving data and the road condition data to be driven; when the target difference meets the discharge amount difference condition, the fuel cell system is over-temperature controlled, so that the temperature of the fuel cell system of the vehicle can be over-temperature controlled during high-speed driving, the temperature of the fuel cell system can be reduced, and the safety of the vehicle during driving can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic flow chart of an embodiment of an over-temperature control method for a fuel cell system provided by the present invention;

[0046] Figure 2 For the present invention Figure 1 A schematic flow chart of an embodiment of step S102;

[0047] Figure 3 For the present invention Figure 1A schematic flow chart of an embodiment after step S102;

[0048] Figure 4 For the present invention Figure 1 A schematic flow chart of an embodiment of step S103;

[0049] Figure 5 For the present invention Figure 1 A schematic diagram of an embodiment flow chart before step S103;

[0050] Figure 6 A schematic structural diagram of an embodiment of an over-temperature control device for a fuel cell system provided by the present invention;

[0051] Figure 7 This is a schematic structural diagram of an embodiment of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0052] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0053] like Figure 1 As shown, a specific embodiment of the present invention discloses an over-temperature control method for a fuel cell system, comprising:

[0054] S101, obtaining vehicle driving data and road condition data of a target road section to be driven; the target road section is a road section to be driven within a preset distance in front of the vehicle;

[0055] S102, obtaining demand data of the fuel cell system based on the driving data and the road condition data to be driven;

[0056] S103: when the demand data satisfies the demand power condition, obtaining a target difference value based on the driving data and the road condition data to be driven;

[0057] S104: When the target difference meets the discharge amount difference condition, perform over-temperature control on the fuel cell system.

[0058] It should be understood that embodiments of the present invention can be applied to vehicles, which may include a fuel cell system and a thermal management system. A fuel cell system is a power generation system composed of a fuel cell as its core, a fuel supply and circulation system, an oxidant supply system, a water / heat management system, and a control system. A thermal management system is an integrated system that involves at least one element and the environment. A thermal management system can be divided into a heat dissipation system, a temperature control system, and a fan control system. Regarding the heat dissipation system, electronic equipment generates a large amount of heat during operation. Failure to dissipate heat promptly can significantly impact the performance and lifespan of the equipment. Therefore, the heat dissipation system is an essential subsystem of the thermal management system. The heat dissipation system primarily includes heat sinks, heat sinks, heat pipes, thermal paste, and thermally conductive silicon pads. These components dissipate heat from the electronic equipment through conduction, convection, and radiation. Temperature control systems: With the development of electronic equipment, the integration level within the equipment is increasing, and the thermal coupling effect between components is becoming increasingly severe. Therefore, precise temperature control of the equipment is required. Temperature control systems primarily achieve temperature control by accurately measuring temperature changes within the equipment and controlling the temperature point. Temperature control systems typically include components such as temperature sensors, controllers, and actuators. Temperature sensors measure the temperature of equipment. Based on the feedback from the temperature sensors, controllers calculate the required control signals and then issue control instructions to actuators to control the equipment's temperature. Fan control systems control the speed of fans within equipment, rapidly dissipating heat by adjusting the fan speed. Fan control systems typically consist of three components: sensors, controllers, and drivers. The sensors primarily detect the temperature within the equipment, while the controllers calculate the required control signals and, through the drivers, control the fan speed. The primary function of fan control systems is to ensure proper fan operation while minimizing noise and energy consumption.

[0059] In short, thermal management systems are an indispensable part of modern electronic devices, helping them better control temperature and extend their lifespan. The three main subsystems of a thermal management system are the heat dissipation system, the temperature control system, and the fan control system. They are responsible for heat dissipation, precise temperature control, and fan control, respectively.

[0060] In a specific embodiment of the present invention, based on the vehicle control platform, the vehicle controller (VCU) can obtain information such as vehicle status, driving speed, and SOC. The fuel cell system controller (FCU) can obtain fuel cell cooling requirements. The thermal management system controller (HMS) can obtain data such as the thermal management system's cooling capacity, i.e., vehicle driving data. Information such as the road conditions and distance ahead of the vehicle can be obtained from the onboard navigation system and geographic information system (GPS, GIS), i.e., road condition data for a target section to be driven. The target section can be a section to be driven within a preset distance ahead of the vehicle. The specific acquisition method can be configured based on actual conditions and is not limited by the present embodiment. Fuel cell system demand data can then be calculated based on the driving data and the road condition data to be driven. If the demand data meets a demand power condition, a target difference can be calculated based on the driving data and the road condition data to be driven. The target difference can then be determined. When the target difference meets a discharge capacity difference condition, indicating that the fuel cell system power is increasing, the fuel cell system is controlled to enter an over-temperature control model, performing over-temperature control on the fuel cell system to reduce the fuel cell system temperature. Among them, the demand power condition and the discharge amount difference condition can be set according to actual conditions. For example, the demand power condition can be that the demand data meets a certain threshold or is in a certain interval, and the discharge amount difference condition can be that the target difference meets a certain threshold or is in a certain interval, etc. The embodiment of the present invention is not limited here.

[0061] Compared with the prior art, this embodiment provides a method for obtaining the driving data of a vehicle during high-speed driving and the road condition data of a target section to be driven within a preset distance in front of the vehicle. The demand data of the fuel cell system can be obtained based on the driving data and the road condition data to be driven, so that the demand data can be judged. When the demand data meets the demand power condition, the target difference is obtained based on the driving data and the road condition data to be driven; when the target difference meets the discharge amount difference condition, the fuel cell system is over-temperature controlled, so that the temperature of the fuel cell system of the vehicle can be over-temperature controlled during high-speed driving, the temperature of the fuel cell system can be reduced, and the safety of the vehicle during driving can be improved.

[0062] In some embodiments of the present invention, the driving data includes basic vehicle data, and the demand data includes battery power demand and heat dissipation demand, such as Figure 2 As shown, step S102 includes:

[0063] S201, determining the energy consumption of the vehicle within a preset distance ahead based on the road condition data to be driven and the basic vehicle data;

[0064] S202, obtaining the battery power requirement of the fuel cell system based on the vehicle energy consumption, the road condition data to be driven, and the basic vehicle data;

[0065] S203 : Obtain the heat dissipation requirement of the fuel cell system according to the required power of the battery.

[0066] In a specific embodiment of the present invention, driving data may include basic vehicle data and battery data of the fuel cell system. The basic vehicle data may be based on the vehicle control platform, and the vehicle controller VCU may obtain information such as the vehicle status, driving speed, and SOC. The battery data of the fuel cell system includes data such as the fuel cell heat dissipation requirements, which may be obtained by the fuel cell system controller FCU, and the thermal management system heat dissipation capacity, which may be obtained from the thermal management system controller HMS. The demand data may include the required power and heat dissipation requirements, so that the energy consumption of the vehicle within a preset distance ahead can be determined based on the road condition data to be driven and the basic vehicle data. The energy consumption of the vehicle can be obtained using formula (1):

[0067] E 1 =W·L 1 / 100+aW·L 2 / 100 (1)

[0068] Among them, the energy consumption of the whole vehicle E1 The unit is kWh; W The recent vehicle power consumption on flat roads (unit: kWh / 100km, excluding the fuel cell system charging capacity), L 1 is the total flat road distance of the target section within the preset distance ahead, L 2 is the total distance of the slope of the target road section within the preset distance ahead (if there are multiple slopes with different slope values, the corresponding slope values ​​should be added to the formula axW·Lx / 100 ), a is the slope power consumption coefficient (this value is based on the slope i The calibration value is calibrated through simulation experiments).

[0069] Furthermore, the battery power requirement of the fuel cell system can be obtained based on the energy consumption of the entire vehicle and the battery data. Since the scenario set in the embodiment of the present invention is a high-speed scenario, the vehicle speed is usually relatively stable in a short period of time. The average vehicle speed in the basic vehicle data can be obtained, and the preset distance ahead in the road condition data to be traveled can also be obtained. Therefore, the time taken to pass the preset distance ahead can be expressed as t=s / v Where, s The preset distance ahead, in km; v is the recent average vehicle speed in km / h, then the battery power requirement of the fuel cell system can be expressed as P 1 =E / t , unit kW.

[0070] Furthermore, the power demand can be achieved through the battery P 1. Heat dissipation requirements of fuel cell systems P 2. The heat dissipation requirement of the fuel cell system is a calibrated value, which is calibrated by the fuel cell manufacturer before the fuel cell leaves the factory. After receiving the battery power requirement, the fuel cell controller will control the thermal management system. At this time, the power of the thermal management system is the heat dissipation requirement of the fuel cell system (the sum of the power of the fan and water pump, etc.).

[0071] In some embodiments of the present invention, the vehicle includes a thermal management system, the driving data also includes battery data of the fuel cell system, and the battery data includes maximum power, such as Figure 3 As shown, after step S102, the following steps are further included:

[0072] S301, obtaining a thermal management power requirement of a thermal management system according to a heat dissipation requirement of a fuel cell system;

[0073] S302, obtaining a target power according to the battery power requirement and the thermal management power requirement;

[0074] S303, determining whether the target power is greater than the maximum power;

[0075] S304, if not, adjusting the output power of the fuel cell system to the target power;

[0076] S305: If yes, determine that the demand data meets the required power condition.

[0077] In a specific embodiment of the present invention, the vehicle may further include a thermal management system, and the driving data may further include battery data of the fuel cell system. The battery data may include a maximum power. After obtaining the battery power requirement and heat dissipation requirement of the fuel cell system, the thermal management power requirement of the thermal management system may be obtained based on the heat dissipation requirement of the fuel cell system. The thermal management power requirement of the thermal management system corresponds to the heat dissipation requirement of the fuel cell system in a one-to-one relationship. The specific corresponding data may be set according to actual conditions, and the embodiment of the present invention is not limited here. For example, when the heat dissipation requirement of the fuel cell system is 100KW, the thermal management power requirement of the thermal management system is 120KW. When the heat dissipation requirement of the fuel cell system is 120KW, the thermal management power requirement of the thermal management system is 140KW. The battery power requirement and the thermal management power requirement may then be added to obtain a target power. If the target power is greater than the maximum power of the fuel cell system in the battery data, the maximum power may be set according to actual conditions, and the embodiment of the present invention is not limited here. If not, the output power of the fuel cell system may be adjusted to the target power, and the fuel cell system may be controlled to operate normally. If so, it may be determined that the demand data meets the power requirement condition, and then S103 and subsequent processes are performed.

[0078] In some embodiments of the present invention, the basic vehicle data includes vehicle speed, such as Figure 4 As shown, step S103 includes:

[0079] S401, obtaining the driving time of the vehicle through the target road section based on the preset distance ahead, the vehicle speed, and the road condition data to be driven;

[0080] S402: Obtain a target total energy consumption for the target road section based on heat dissipation requirements, driving time, and vehicle energy consumption;

[0081] S403, obtaining the power generation of the fuel cell system according to the battery power requirement and the driving time;

[0082] S404: Obtain a target difference based on the power generation and the target total energy consumption.

[0083] In a specific embodiment of the present invention, the basic vehicle data may include vehicle speed. The driving time of the vehicle passing the target road section can be obtained based on the vehicle speed, the preset distance ahead, and the road condition data to be traveled in the basic vehicle data. Therefore, the driving time used to pass the preset distance ahead can be expressed as t=s / v Where, s The preset distance ahead, in km; v is the vehicle speed in km / h.

[0084] In some embodiments of the present invention, obtaining a target total energy consumption for a target road section based on heat dissipation requirements, travel time, and vehicle energy consumption includes:

[0085] According to the heat dissipation demand and driving time, the total energy consumption of the thermal management system is obtained;

[0086] According to the vehicle energy consumption and the total energy consumption, the target total energy consumption of the target section is obtained.

[0087] In a specific embodiment of the present invention, the heat dissipation requirement can be P 2 and driving time t , calculate the total energy consumption of the thermal management system E 2 = Cooling requirements P 2 ·t , then the energy consumption of the whole vehicle can be E 1 and total energy expenditure E 2 to get the target total energy consumption of the target section E 3.

[0088] Furthermore, the battery power can be adjusted according to the battery requirements. P 1 and driving time t Calculation is performed to obtain the power generation of the fuel cell system, and then the difference between the power generation and the target total energy consumption E3 is calculated to obtain the target difference.

[0089] In some embodiments of the present invention, the basic vehicle data includes the power battery capacity, current SOC and minimum SOC, such as Figure 5 As shown, before step S103, the following steps are included:

[0090] S501. Obtain the maximum discharge capacity of the power battery according to the power battery capacity, the current SOC, and the minimum SOC;

[0091] S502: Determine whether the target difference is greater than or equal to the maximum discharge capacity of the power battery;

[0092] S503: If not, control the fuel cell system to operate at maximum power;

[0093] S504: If yes, determine whether the target difference satisfies the discharge amount difference condition.

[0094] In a specific embodiment of the present invention, the basic data of the vehicle may include data such as the power battery capacity, current SOC and minimum SOC. To protect the power battery, the vehicle controller will calibrate a minimum allowable SOC, i.e., the minimum SOC. The maximum discharge capacity of the power battery can be obtained by subtracting the minimum SOC (or a calibration value slightly greater than the minimum SOC) from the current SOC and then multiplying it by the power battery capacity. E4 = (current SOC - minimum SOC) E power battery, where the power battery capacity can be set according to actual conditions, and the embodiment of the present invention does not limit this. Then, it can be determined whether the target difference is greater than or equal to the maximum discharge capacity of the power battery. E4 If not, the fuel cell system can be controlled to operate at maximum power and the thermal management system can operate normally. If so, it can be determined that the target difference meets the discharge amount difference condition.

[0095] In some embodiments of the present invention, step S104 includes:

[0096] When the fuel cell system enters the over-temperature control mode, the upper temperature limit of the fuel cell system's water inlet and outlet is set to a preset temperature value, the power of the thermal management system is set to a preset power, and the vehicle data is updated in real time to obtain an updated target difference value;

[0097] When the updated target difference meets the discharge amount difference condition, it is determined that the fuel cell system exits the over-temperature control mode, and the fuel cell system is controlled to operate at maximum power.

[0098] In a specific embodiment of the present invention, when the target difference satisfies the discharge capacity difference condition, the fuel cell system enters an over-temperature control mode. The specific control process of the over-temperature control mode is as follows: the upper temperature limit of the fuel cell system's water inlet and outlet is set to a preset temperature value, thereby allowing the fuel cell system's water inlet and outlet temperatures to rise to the preset temperature value; and the power of the thermal management system is set to a preset power, thereby reducing the thermal management system power. (As the water temperature at the fuel cell system's water inlet and outlet increases, the temperature difference between the water temperature and the air temperature increases, heat dissipation efficiency improves, and the thermal management system power required to meet the same heat dissipation capacity is reduced.) The preset temperature value and preset power can be set according to actual conditions and are not limited in this embodiment of the present invention. For example, the upper temperature limit of the fuel cell system's water inlet and outlet temperatures is 85°C, the preset temperature value can be 90°C, and the preset power can be lower than the normal operating power. Then, in the over-temperature control mode, real-time vehicle operating data can be acquired, and the determination process in step S502 is repeated, thereby entering a loop. Until the result of the determination in step S502 is yes, the fuel cell system can be controlled to operate at maximum power to ensure vehicle operation safety.

[0099] In this specific embodiment of the present invention, a hydrogen fuel cell vehicle currently under development has a gross vehicle mass of 49 tons, a 50 kWh power battery, a fuel cell rated power of 200 kW, a fuel cell heat dissipation requirement of 200 kW at rated power (fuel cell system efficiency is approximately 50%), a water outlet temperature requirement of 80°C, and a maximum over-temperature temperature of 90°C. Under these conditions, the thermal management system, which uses a high-pressure fan, operates at a normal power of 20 kW and a power of 15 kW under over-temperature conditions. A simulated operating condition is set: a 60 km (60 km) uphill mile at a speed of 100 km / h. The total energy consumption for this section is 120 kWh (approximately 200 kWh / 100 km). The current SOC is 50%, with a minimum SOC of 30%.

[0100] The road condition information within the preset distance ahead is obtained through GPS and GIS, and the road condition information is combined with various vehicle information to predict that the vehicle energy consumption within the preset section ahead is 120kWh; the fuel cell system power demand of 200kW is obtained through the vehicle energy consumption, and the fuel cell system heat demand of 20kW is obtained through the fuel cell system power demand, and judgment 1 is performed; judgment 1: Is the fuel cell system power demand of 20kW + the thermal management system power demand of 200kW less than or equal to the maximum power of the fuel cell system of 200kW? If not, the total energy consumption of the thermal management system of 20kW is calculated based on the time it takes for the vehicle to pass through the preset section of 0.6h (the speed in high-speed scenarios is generally relatively stable, and the time it takes to pass through the preset section can be estimated), and then judgment 2 is performed: whether the current SOC supports the vehicle to travel through the preset section (that is, the power battery allows a discharge of 10kWh, the total energy consumption of the vehicle is 220kW*0.6h=132kWh, the power generation is 200kW*0.6 =120kWh, 132-120= If the judgment result of 12kWh>10kWh is no, the fuel cell system enters the over-temperature mode, allowing the inlet and outlet temperatures of the fuel cell system to rise to the preset value of 90℃, and the thermal management system power is reduced to 15kW until the result of judgment 2 is yes (approximately 2 / 5=0.4h).

[0101] The main purpose of the over-temperature control in the embodiment of the present invention is to reduce the power consumption of the thermal management system and improve the energy management efficiency of the entire vehicle. At the same time, for specific scenarios, after simulation in advance, the fuel cell thermal management system configured for the entire vehicle can be appropriately reduced to reduce costs. Simulating the operation scenario in advance can identify the road conditions in advance. For example, a certain operation scenario is mostly flat, but there will be a long uphill section before entering a mountainous area with a hillside and downhill cycle. At this time, the long uphill will cause the power consumption of the entire vehicle to increase, and the fuel cell system will be in a high power range for a long time, which will increase the pressure on the thermal management system and require a higher power thermal management system. However, only this section of the road requires a high-power thermal management system, and it is not used normally, which causes waste. The embodiment of the present invention can solve this problem to a certain extent and reduce costs.

[0102] This embodiment of the present invention leverages the vehicle's existing controller to continuously monitor the vehicle's energy status using information from the road ahead. This allows for control over the timing and duration of fuel cell system over-temperature modes, thereby reducing the power of the thermal management system. By proactively analyzing the vehicle's operating routes, the vehicle's thermal management system configuration can be tailored to meet specific requirements (e.g., reducing the area of ​​the radiator grille, the power of the cooling fans, or the number of cooling fans), thereby lowering vehicle costs.

[0103] In order to better implement the over-temperature control method of the fuel cell system in the embodiment of the present invention, based on the over-temperature control method of the fuel cell system, the embodiment of the present invention also provides an over-temperature control device of the fuel cell system, such as Figure 6 As shown, the over-temperature control device 600 of the fuel cell system includes:

[0104] The data acquisition module 601 is used to acquire the vehicle's driving data and the road condition data of the target road section to be traveled; the target road section is the road section to be traveled within a preset distance in front of the vehicle;

[0105] The demand determination module 602 is used to obtain demand data of the fuel cell system based on the driving data and the road condition data to be driven;

[0106] The difference calculation module 603 is used to obtain a target difference based on the driving data and the road condition data to be driven when the demand data meets the required power condition;

[0107] The over-temperature control module 604 is configured to perform over-temperature control on the fuel cell system when the target difference satisfies the discharge amount difference condition.

[0108] The over-temperature control device 600 of the fuel cell system provided in the above embodiment can implement the technical solution described in the above fuel cell system over-temperature control method embodiment. The specific implementation principles of the above modules or units can refer to the corresponding contents in the above fuel cell system over-temperature control method embodiment, which will not be repeated here.

[0109] like Figure 7 As shown, the present invention also provides an electronic device 700. The electronic device 700 includes a processor 701, a memory 702 and a display 703. Figure 7 Only some of the components of the electronic device 700 are shown, but it should be understood that it is not required to implement all of the shown components, and more or fewer components may be implemented instead.

[0110] In some embodiments, the memory 702 may be an internal storage unit of the electronic device 700, such as a hard disk or memory of the electronic device 700. In other embodiments, the memory 702 may also be an external storage device of the electronic device 700, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the electronic device 700.

[0111] Furthermore, the memory 702 may include both an internal storage unit of the electronic device 700 and an external storage device. The memory 702 is used to store application software installed in the electronic device 700 and various data.

[0112] In some embodiments, the processor 701 may be a central processing unit (CPU), a microprocessor, or other data processing chip, configured to execute program codes or process data stored in the memory 702, such as the over-temperature control method for the fuel cell system of the present invention.

[0113] In some embodiments, display 703 can be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. Display 703 is used to display information about electronic device 700 and to display a visual user interface. Components 701-703 of electronic device 700 communicate with each other via a system bus.

[0114] In some embodiments of the present invention, when the processor 701 executes the over-temperature control program of the fuel cell system in the memory 702, the following steps may be implemented:

[0115] Acquire the vehicle's driving data and the road condition data of the target road section to be traveled; the target road section is the road section to be traveled within a preset distance in front of the vehicle;

[0116] Obtaining demand data for the fuel cell system based on driving data and road condition data to be driven;

[0117] When the demand data satisfies the demand power condition, a target difference is obtained according to the driving data and the road condition data to be driven;

[0118] When the target difference meets the discharge amount difference condition, the fuel cell system is over-temperature controlled.

[0119] It should be understood that, when the processor 701 executes the over-temperature control program of the fuel cell system in the memory 702 , in addition to the above functions, it can also implement other functions. For details, please refer to the description of the corresponding method embodiment above.

[0120] Furthermore, the embodiments of the present invention do not specifically limit the type of electronic device 700 mentioned. The electronic device 700 may be a portable electronic device such as a mobile phone, tablet computer, personal digital assistant (PDA), wearable device, or laptop computer. Exemplary embodiments of portable electronic devices include, but are not limited to, portable electronic devices running iOS, Android, Microsoft, or other operating systems. The portable electronic devices mentioned above may also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the present invention, the electronic device 700 may not be a portable electronic device, but rather a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0121] Accordingly, an embodiment of the present application also provides a computer-readable storage medium, which is used to store computer-readable programs or instructions. When the program or instructions are executed by a processor, the over-temperature control method steps or functions of the fuel cell system provided in the above-mentioned method embodiments can be implemented.

[0122] Those skilled in the art will appreciate that all or part of the process flow of the above-described method embodiment can be implemented by instructing related hardware (such as a processor, controller, etc.) through a computer program, and the computer program can be stored in a computer-readable storage medium. The computer-readable storage medium may be a magnetic disk, an optical disk, a read-only memory, or a random access memory.

[0123] The above is a detailed introduction to the over-temperature control method and device for the fuel cell system provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas. At the same time, for those skilled in the art, based on the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A method for controlling overtemperature of a fuel cell system, characterized in that: include: Obtaining the vehicle's driving data and the target road section's road condition data; The target road section is a road section to be traveled within a preset distance in front of the vehicle; Obtaining demand data of the fuel cell system according to the driving data and the road condition data to be driven; the demand data includes battery power demand and heat dissipation demand; When the demand data satisfies the demand power condition, a target difference is obtained based on the driving data and the road condition data to be driven; the target difference is the difference between the power generation of the fuel cell system and the target total energy consumption of the target road section; When the target difference satisfies a discharge amount difference condition, over-temperature control is performed on the fuel cell system.

2. The over-temperature control method of the fuel cell system according to claim 1, characterized in that: The driving data includes basic vehicle data, and obtaining the demand data of the fuel cell system based on the driving data and the road condition data to be driven includes: Determining the energy consumption of the vehicle within the preset distance ahead based on the road condition data to be driven and the basic vehicle data; Obtaining a battery power requirement of the fuel cell system according to the vehicle energy consumption, the road condition data to be driven, and the vehicle basic data; The heat dissipation requirement of the fuel cell system is obtained according to the battery power requirement.

3. The over-temperature control method of the fuel cell system according to claim 2, characterized in that: The vehicle includes a thermal management system, the driving data further includes battery data of a fuel cell system, the battery data includes maximum power, and after obtaining demand data of the fuel cell system based on the driving data and the road condition data to be driven, the method further includes: Obtaining a thermal management power requirement of the thermal management system according to a heat dissipation requirement of the fuel cell system; Obtaining a target power according to the battery required power and the thermal management required power; Determining whether the target power is greater than the maximum power; If not, adjusting the output power of the fuel cell system to the target power; If so, it is determined that the demand data meets the required power condition.

4. The over-temperature control method of the fuel cell system according to claim 3, characterized in that: The basic vehicle data includes vehicle speed, and obtaining a target difference value based on the driving data and the road condition data to be driven includes: Obtaining a travel time for the vehicle to travel through the target road section based on the preset distance ahead, the vehicle speed, and the road condition data to be traveled; Obtaining a target total energy consumption of the target road section according to the heat dissipation demand, the driving time, and the energy consumption of the entire vehicle; Obtaining power generation of the fuel cell system according to the battery demand power and the driving time; A target difference is obtained according to the power generation and the target total energy consumption.

5. The over-temperature control method of the fuel cell system according to claim 4, characterized in that: Obtaining the target total energy consumption of the target section according to the heat dissipation demand, the driving time, and the vehicle energy consumption includes: Obtaining a total energy consumption of the thermal management system according to the heat dissipation demand and the driving time; The target total energy consumption of the target road section is obtained according to the whole vehicle energy consumption and the total energy consumption.

6. The over-temperature control method of a fuel cell system according to claim 2, characterized in that: The basic vehicle data includes the power level of the power battery, the current SOC, and the minimum SOC. When the demand data satisfies the required power condition, before obtaining the target difference value based on the driving data and the road condition data to be driven, the method includes: Obtaining a maximum discharge capacity of the power battery according to the power battery power, the current SOC, and the minimum SOC; determining whether the target difference is greater than or equal to the maximum discharge capacity of the power battery; If not, controlling the fuel cell system to operate at maximum power; If so, it is determined that the target difference satisfies the discharge amount difference condition.

7. The over-temperature control method of a fuel cell system according to claim 6, characterized in that: The over-temperature control of the fuel cell system includes: When the fuel cell system enters the over-temperature control mode, the upper temperature limits of the water inlet and outlet of the fuel cell system are set to a preset temperature value, the power of the thermal management system is set to a preset power, and the data of the vehicle is updated in real time to obtain an updated target difference value; When the updated target difference satisfies the discharge amount difference condition, it is determined that the fuel cell system exits the over-temperature control mode, and the fuel cell system is controlled to operate at maximum power.

8. An over-temperature control device for a fuel cell system, characterized in that: include: A data acquisition module is used to acquire the vehicle's driving data and the road condition data of the target road section to be driven; The target road section is a road section to be traveled within a preset distance in front of the vehicle; a demand determination module, configured to obtain demand data of the fuel cell system based on the driving data and the road condition data to be driven; the demand data including battery power demand and heat dissipation demand; a difference calculation module, configured to obtain a target difference based on the driving data and the road condition data to be driven, when the demand data satisfies a demand power condition; The target difference is the difference between the power generation of the fuel cell system and the target total energy consumption of the target section; An over-temperature control module is used to perform over-temperature control on the fuel cell system when the target difference meets the discharge amount difference condition.

9. An electronic device, characterized in that: include: A processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the steps of the over-temperature control method of the fuel cell system according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the over-temperature control method for a fuel cell system according to any one of claims 1 to 7.

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