Fuel cell vehicle energy management method and system

Abstract

This invention provides an energy management method and system for fuel cell vehicles, applied to the vehicle controller of a fuel cell vehicle; it includes: acquiring the current temperature of the fuel cell vehicle's location and the lowest ambient temperature within a preset future time period; determining whether the lowest ambient temperature is less than or equal to a first temperature threshold; if so, implementing a winter energy management strategy for the fuel cell of the fuel cell vehicle; if not, implementing a normal temperature energy management strategy for the fuel cell of the fuel cell vehicle. This invention alleviates the technical problem of lifespan degradation caused by cold start of fuel cells in low-temperature environments.

Description

Technical Field

[0001] This invention relates to the field of fuel cell energy management technology, and in particular to a fuel cell vehicle energy management method and system. Background Technology

[0002] Fuel cell systems are a key development direction for power systems in new energy vehicles, offering advantages such as being completely pollution-free and having a long driving range. While low-temperature self-starting of fuel cells is more advanced and places fewer demands on the external vehicle compared to low-temperature starting methods requiring external auxiliary heating, the current immaturity of the technology means that this process significantly impacts the lifespan of the fuel cell.

[0003] The current mainstream energy management strategy for fuel cell vehicles is a dynamic management strategy based on the state of charge (SOC) of the power battery. That is, the power of the fuel cell mainly depends on the SOC of the power battery. However, this strategy does not take into account the real-time temperature environment of the vehicle and the future cold start requirements at low temperatures, which leads to the lifespan reduction of the fuel cell during cold starts at low temperatures. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an energy management method and system for fuel cell vehicles to alleviate the technical problem of lifespan degradation caused by cold start of fuel cells in low-temperature environments.

[0005] In a first aspect, embodiments of the present invention provide an energy management method for a fuel cell vehicle, applied to the vehicle controller of a fuel cell vehicle; comprising: acquiring the current temperature of the location of the fuel cell vehicle and the lowest ambient temperature within a preset future time period; determining whether the lowest ambient temperature is less than or equal to a first temperature threshold; if so, executing a winter energy management strategy for the fuel cell of the fuel cell vehicle; the winter energy management strategy comprising: controlling the output power of the fuel cell to be the sum of the power required to maintain the SOC value of the power battery greater than a target SOC value and the required power of the fuel cell vehicle; the power battery being the power battery of the fuel cell vehicle; the target SOC value being an SOC value determined based on the current temperature; if not, executing a normal temperature energy management strategy for the fuel cell of the fuel cell vehicle; the normal temperature energy management strategy being a strategy for matching the output power of the fuel cell to the required power of the fuel cell vehicle.

[0006] Furthermore, before obtaining the current temperature of the location of the fuel cell vehicle and the lowest ambient temperature within a preset future time period, the method further includes: determining whether the season of the location of the fuel cell vehicle is winter; if so, implementing the winter energy management strategy for the fuel cell of the fuel cell vehicle; if not, obtaining the current temperature of the location of the fuel cell vehicle and the lowest ambient temperature within a preset future time period.

[0007] Furthermore, obtaining the current temperature of the location of the fuel cell vehicle and the lowest ambient temperature within a preset future time period includes: obtaining the current temperature of the location of the fuel cell vehicle and the lowest ambient temperature within a preset future time period through the vehicle networking system T-BOX of the fuel cell vehicle.

[0008] Further, determining whether the season of the location where the fuel cell vehicle is located is winter includes: obtaining the location and current date of the fuel cell vehicle through the vehicle networking system T-BOX of the fuel cell vehicle; and determining whether the season of the location where the fuel cell vehicle is located is winter based on the location and current date of the fuel cell vehicle.

[0009] Furthermore, the winter energy management strategy includes a primary winter energy management strategy and a secondary winter energy management strategy. Executing the winter energy management strategy for the fuel cell of the fuel cell vehicle includes: determining whether the current temperature is less than or equal to a second temperature threshold; the second temperature threshold is less than the first temperature threshold; if not, then executing the primary winter energy management strategy; the primary winter energy management strategy includes: controlling the output power of the fuel cell to be the sum of the power required to maintain the SOC value of the power battery greater than the first SOC value and the power required by the fuel cell vehicle; if yes, then executing the secondary winter energy management strategy; the secondary winter energy management strategy includes: controlling the output power of the fuel cell to be the sum of the power required to maintain the SOC value of the power battery greater than the second SOC value and the power required by the fuel cell vehicle; wherein the second SOC value is greater than the first SOC value.

[0010] Secondly, embodiments of the present invention also provide a fuel cell vehicle energy management system, comprising: an acquisition module, a judgment module, and an energy management module; wherein, the acquisition module is used to acquire the current temperature of the location of the fuel cell vehicle and the lowest ambient temperature within a preset future time period; the judgment module is used to determine whether the lowest ambient temperature is less than or equal to a first temperature threshold; the energy management module is used to execute a winter energy management strategy for the fuel cell of the fuel cell vehicle if the lowest ambient temperature is determined to be less than or equal to the first temperature threshold; the winter energy management strategy includes: controlling the output power of the fuel cell to be the sum of the power required to maintain the SOC value of the power battery greater than the target SOC value and the required power of the fuel cell vehicle; the power battery is the power battery of the fuel cell vehicle; the target SOC value is the SOC value determined based on the current temperature; the energy management module is further used to execute a normal temperature energy management strategy for the fuel cell of the fuel cell vehicle if the lowest ambient temperature is determined to be greater than the first temperature threshold; the normal temperature energy management strategy is a strategy of matching the output power of the fuel cell with the required power of the fuel cell vehicle.

[0011] Furthermore, the acquisition module is also used to acquire the location of the fuel cell vehicle, the current date, the current temperature, and the lowest ambient temperature within a preset future time period through the vehicle networking system T-BOX of the fuel cell vehicle.

[0012] Furthermore, the winter energy management strategy includes a first-level winter energy management strategy and a second-level winter energy management strategy; the energy management module further includes: a first energy management unit and a second energy management unit; wherein, the first energy management unit is used to execute the first-level winter energy management strategy if it is determined that the current temperature is greater than a second temperature threshold; the first-level winter energy management strategy includes: controlling the output power of the fuel cell to be the sum of the power required to maintain the SOC value of the power battery greater than the first SOC value and the power required by the fuel cell vehicle; wherein the second temperature threshold is less than the first temperature threshold; the second energy management unit is used to execute the second-level winter energy management strategy if it is determined that the current temperature is less than or equal to the second temperature threshold; the second-level winter energy management strategy includes: controlling the output power of the fuel cell to be the sum of the power required to maintain the SOC value of the power battery greater than the second SOC value and the power required by the fuel cell vehicle; wherein, the second SOC value is greater than the first SOC value.

[0013] Thirdly, embodiments of the present invention also provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method described in the first aspect above.

[0014] Fourthly, embodiments of the present invention also provide a computer-readable medium having processor-executable non-volatile program code, the program code causing the processor to perform the method described in the first aspect above.

[0015] This invention provides an energy management method and system for fuel cell vehicles. To address the performance degradation of fuel cells and power batteries at low temperatures, different energy management strategies are selected based on temperature changes over a future period to alleviate the technical problem of lifespan degradation caused by cold starts of fuel cells in low-temperature environments. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A flowchart illustrating an energy management method for a fuel cell vehicle provided in an embodiment of the present invention;

[0018] Figure 2 A flowchart for implementing a winter energy management strategy is provided as an embodiment of the present invention;

[0019] Figure 3 A CAN topology block diagram of a fuel cell vehicle provided in an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of high-voltage electrical connections for a fuel cell vehicle power system is provided as an embodiment of the present invention.

[0021] Figure 5 A flowchart illustrating a room-temperature energy management strategy provided in an embodiment of the present invention;

[0022] Figure 6 A flowchart illustrating a winter level 1 energy management strategy according to an embodiment of the present invention;

[0023] Figure 7 A flowchart illustrating a winter secondary energy management strategy according to an embodiment of the present invention;

[0024] Figure 8A schematic diagram of an energy management system for a fuel cell vehicle provided in an embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of an energy management module provided in an embodiment of the present invention. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1:

[0028] Figure 1 This is a flowchart illustrating an energy management method for a fuel cell vehicle according to an embodiment of the present invention. This method is applied to the vehicle controller unit (VCU) of a fuel cell vehicle. Figure 1 As shown, the method specifically includes the following steps:

[0029] Step S102: Obtain the current temperature of the location where the fuel cell vehicle is located and the lowest ambient temperature within a preset future time period. For example, obtain the lowest ambient temperature of the location where the fuel cell vehicle is located within the next three days.

[0030] Optionally, in this embodiment of the invention, the current temperature of the fuel cell vehicle's location and the lowest ambient temperature within a preset future time period are obtained through the vehicle networking system T-BOX of the fuel cell vehicle.

[0031] Step S104: Determine whether the lowest ambient temperature is less than or equal to the first temperature threshold; if yes, proceed to step S106; if no, proceed to step S108.

[0032] Step S106: Implement a winter energy management strategy for the fuel cell of the fuel cell vehicle. The winter energy management strategy includes: controlling the output power of the fuel cell to be the sum of the power required to keep the SOC value of the power battery greater than the target SOC value and the power required by the fuel cell vehicle; the power battery is the power battery of the fuel cell vehicle; the target SOC value is the SOC value determined based on the current temperature.

[0033] Step S108: Implement a normal temperature energy management strategy for the fuel cell of the fuel cell vehicle; the normal temperature energy management strategy is a strategy that matches the output power of the fuel cell with the power demand of the fuel cell vehicle.

[0034] This invention provides an energy management method for fuel cell vehicles. To address the performance degradation of fuel cells and power batteries at low temperatures, different energy management strategies are selected based on temperature changes over a future period to alleviate the technical problem of lifespan degradation caused by cold starts of fuel cells in low-temperature environments.

[0035] Optionally, before step S102 in the embodiments of the present invention, the method further includes the following steps:

[0036] Determine whether the location of the fuel cell vehicle is in winter;

[0037] If so, then implement a winter energy management strategy for the fuel cell of the fuel cell vehicle; otherwise, proceed to step S102: obtain the current temperature of the location of the fuel cell vehicle and the lowest ambient temperature within a preset time period in the future.

[0038] In this embodiment of the invention, it is first determined whether the season of the location of the fuel cell vehicle is winter. If it is winter, the winter energy management strategy is directly executed. If it is not winter, the method in steps S102-S108 is used to select whether to execute the winter energy management strategy based on the temperature change in the future period. This can alleviate the technical problem that cold start of fuel cells in low temperature environment will cause lifespan degradation.

[0039] Specifically, in this embodiment of the invention, the step of determining whether the location of the fuel cell vehicle is in winter further includes:

[0040] The T-BOX vehicle-to-everything (V2X) system of the fuel cell vehicle is used to obtain the location and current date of the fuel cell vehicle; based on the location and current date, it is determined whether the season in the location of the fuel cell vehicle is winter.

[0041] Optionally, in this embodiment of the invention, the winter energy management strategy includes a primary winter energy management strategy and a secondary winter energy management strategy.

[0042] Optionally, Figure 2 This is a flowchart illustrating the implementation of a winter energy management strategy according to an embodiment of the present invention. Figure 2 As shown, step S106 further includes the following steps:

[0043] Step S1061: Determine whether the current temperature is less than or equal to the second temperature threshold; if not, proceed to step S1062; if yes, proceed to step S1063. The second temperature threshold is less than the aforementioned first temperature threshold.

[0044] Step S1062: Implement the winter level 1 energy management strategy; the winter level 1 energy management strategy includes: controlling the output power of the fuel cell to be the sum of the power required to keep the SOC value of the power battery greater than the first SOC value and the power required by the fuel cell vehicle.

[0045] Step S1063: Execute the winter secondary energy management strategy; the winter secondary energy management strategy includes: controlling the output power of the fuel cell to be the sum of the power required to keep the SOC value of the power battery greater than the second SOC value and the power required by the fuel cell vehicle; wherein, the second SOC value is greater than the first SOC value.

[0046] As described above, the embodiments of the present invention provide an energy management method for fuel cell vehicles to ensure the adaptability of fuel cells under different operating conditions and temperature environments, ensure the service life of fuel cells, and reduce the lifespan degradation caused by cold starts of fuel cells in low-temperature environments. Optionally, Figure 3 This is a CAN topology block diagram for a fuel cell vehicle according to an embodiment of the present invention.

[0047] like Figure 3 As shown, the fuel cell vehicle includes a VCU, T-BOX, power battery, motor controller, fuel cell, and boost DC converter. The VCU serves as the vehicle's control center, receiving information from the T-BOX and coordinating the power battery, motor controller, and fuel cell to perform their respective functions. The T-BOX acts as a remote data transmitter, receiving information from the backend and transmitting it to the VCU, while simultaneously monitoring key information during vehicle operation and providing it to the backend server. The fuel cell controller coordinates the fuel cell system to maintain its appropriate operating state. The power battery controller receives information from the VCU and controls the charging and discharging of the power battery. The boost DC converter, as the high-voltage unit of the fuel cell system, is responsible for output power control.

[0048] like Figure 3 As shown, in fuel cell vehicles, the VCU, as the vehicle control center, also acts as a gateway. The VCU and T-BOX form a CAN1 network. The reason for the separate network is that the vehicle controller needs to integrate the messages from various network segments and send them to the T-BOX in a unified format. At the same time, the separate network can effectively reduce the load rate of the CAN network. The various controllers of the power system form a CAN2 network, mainly including the VCU, power battery, fuel cell, and motor controller. CAN2, as the power CAN, has high requirements for real-time performance and stability. The fuel cell and boost DC are the CAN within the fuel cell system, which can effectively reduce the CAN load of the vehicle power system and simplify the vehicle control requirements.

[0049] Optionally, Figure 4 This is a schematic diagram of the high-voltage electrical connection of a fuel cell vehicle power system according to an embodiment of the present invention. Figure 4 As shown, in this embodiment of the invention, the high-voltage system of the fuel cell vehicle includes: a fuel cell, a power battery, a boost DC-DC converter, a PDU, and a motor controller; the fuel cell, as the main power source of the vehicle, provides power to the entire vehicle after passing through the boost DC-DC converter; the power battery, as the auxiliary power source of the vehicle, provides the energy required for instantaneous acceleration and braking regenerative energy; the PDU is a high-voltage distribution unit, mainly composed of contactors and fuses; the motor controller is the main drive motor controller.

[0050] The specific steps for energy management are as follows:

[0051] 1. After the vehicle's high and low voltage power-on is completed, the energy management strategy of the vehicle's power system will be implemented. In order to avoid the impact of the vehicle's ambient temperature sensor layout and the vehicle's parking environment on the purging process, the parking location, date and temperature information will be directly obtained through the T-BOX. The T-BOX is required to obtain real-time temperature information from the background.

[0052] 2. The T-BOX transmits the acquired location and temperature information to the VCU via CAN. The VCU determines the season and temperature of the current parking environment based on the current location, date, and temperature information, and decides whether to implement the winter energy management strategy.

[0053] 3. If it is determined that it is not winter, the lowest ambient temperature T1 for the next 3 days will be obtained from the cloud platform via T-BOX.

[0054] 3.1 If the temperature T1 is greater than 0℃ (i.e., the first temperature threshold mentioned above), then the normal temperature energy management strategy shall be executed. Figure 5 A flowchart illustrating a room-temperature energy management strategy according to an embodiment of the present invention is shown below. Figure 5 As shown, this strategy mode allows the vehicle to maximize the role of the fuel cell as the primary power source, reducing the impact of the battery's state of charge (SOC) on the vehicle. It employs a fuel cell power-following control strategy, meaning the fuel cell's output power matches the vehicle's power demand (P). fullcell =P vehicle ), specifically, such as Figure 5 As shown, the SOC value of the power battery is first controlled within the normal temperature threshold range. Then, the power demand of the whole vehicle is calculated and the output power of the fuel cell is set to be equal to the power demand of the whole vehicle. This can avoid frequent charging and discharging of the power battery and high-rate charging and discharging, extend the life of the power battery and give full play to the performance of the fuel cell.

[0055] 3.2 If the temperature is below 0℃, the winter energy management strategy must be entered; or, if the fuel cell vehicle is traveling in winter, the winter energy management strategy must also be entered.

[0056] 3.21. If the current temperature is greater than T2 (i.e., the second temperature threshold mentioned above), then the winter level 1 energy management strategy will be activated. T2 depends on the matching of the vehicle powertrain system (i.e., the matching of the motor power with the output power of the fuel cell and the power of the battery), the size of the battery, and the amount of energy required for the fuel cell to start in low temperatures. Figure 6 This is a flowchart illustrating a winter level 1 energy management strategy according to an embodiment of the present invention. Specifically, as shown... Figure 6 As shown, the output power of the fuel cell is first set according to the threshold requirement so that the SOC value of the power battery is greater than the first SOC value. Then, the power requirement of the whole vehicle is calculated and the output power of the fuel cell is set to be equal to the sum of the power required to keep the SOC value of the power battery greater than the first SOC value and the power requirement of the whole vehicle.

[0057] Specifically, under the winter level 1 energy management strategy mode, the target power of the fuel cell delivered by the vehicle must take into account the capacity decay of the power battery in winter, the current power demand of the vehicle and the energy demand for cold start in low temperature in the future. The target value of the power battery SOC (i.e. the first SOC value mentioned above) should be appropriately increased so that the power battery SOC can meet the energy required for cold start of the fuel cell in low temperature. The purpose of controlling the SOC is to avoid the capacity decay of the power battery in winter from affecting the cold start of the vehicle.

[0058] 3.22 If the parking location is in winter and the temperature is less than or equal to T2, the winter level 2 energy management strategy will be implemented. In this mode, the target SOC value of the power battery (i.e. the second SOC value mentioned above) is required to be further increased to meet the needs of vehicle storage and cold start at lower temperatures in the future. Figure 7 This is a flowchart illustrating a winter secondary energy management strategy according to an embodiment of the present invention. Specifically, as shown... Figure 7 As shown, the output power of the fuel cell is first set according to the threshold requirement, so that the SOC value of the power battery is greater than the second SOC value. Then, the power requirement of the whole vehicle is calculated and the output power of the fuel cell is set to be equal to the sum of the power required to keep the SOC value of the power battery greater than the second SOC value and the power requirement of the whole vehicle.

[0059] This invention provides an energy management method for fuel cell vehicles. It utilizes the T-BOX backend data acquisition capability to predict the energy required for low-temperature start-up of the entire vehicle, addressing the performance degradation of the fuel cell and power battery at low temperatures. This enables vehicle control strategies under different temperatures, protecting the lifespan of the fuel cell and power battery while improving the temperature adaptability of the fuel cell vehicle and enhancing the user experience. Compared to existing technologies, the method provided by this invention reduces the lifespan degradation caused by low-temperature self-start of the fuel cell, optimizes the power coupling between the fuel cell and power battery under different ambient temperatures, and improves the temperature adaptability of the fuel cell vehicle, ensuring its usability in low-temperature environments.

[0060] Example 2:

[0061] Figure 8 This is a schematic diagram of an energy management system for a fuel cell vehicle according to an embodiment of the present invention. Figure 8 As shown, the system includes: an acquisition module 10, a judgment module 20, and an energy management module 30.

[0062] Specifically, the acquisition module 10 is used to acquire the current temperature of the location of the fuel cell vehicle and the lowest ambient temperature within a preset time period in the future.

[0063] Optionally, the acquisition module 10 is also used to acquire the location of the fuel cell vehicle, the current date, the current temperature, and the lowest ambient temperature in a preset future time period through the vehicle networking system T-BOX of the fuel cell vehicle.

[0064] The judgment module 20 is used to determine whether the minimum ambient temperature is less than or equal to the first temperature threshold.

[0065] The energy management module 30 is used to implement a winter energy management strategy for the fuel cell of the fuel cell vehicle if it is determined that the lowest ambient temperature is less than or equal to a first temperature threshold. The winter energy management strategy includes: controlling the output power of the fuel cell to be the sum of the power required to keep the SOC value of the power battery greater than the target SOC value and the power required by the fuel cell vehicle; the power battery is the power battery of the fuel cell vehicle; the target SOC value is the SOC value determined based on the current temperature.

[0066] Optionally, the winter energy management strategy includes a winter level 1 energy management strategy and a winter level 2 energy management strategy.

[0067] The energy management module 30 is also used to implement a normal temperature energy management strategy for the fuel cell of the fuel cell vehicle if it is determined that the minimum ambient temperature is greater than a first temperature threshold; the normal temperature energy management strategy is a strategy that matches the output power of the fuel cell with the power demand of the fuel cell vehicle.

[0068] This invention provides an energy management system for fuel cell vehicles. To address the performance degradation of fuel cells and power batteries at low temperatures, different energy management strategies are selected based on temperature changes over a future period to alleviate the technical problem of lifespan reduction caused by cold starts of fuel cells in low-temperature environments.

[0069] Optionally, Figure 9 This is a schematic diagram of an energy management module according to an embodiment of the present invention. Figure 9 As shown, the energy management module 30 also includes: a first energy management unit 31 and a second energy management unit 32.

[0070] Specifically, the first energy management unit 31 is used to execute a winter level 1 energy management strategy if it is determined that the current temperature is greater than a second temperature threshold. The winter level 1 energy management strategy includes controlling the output power of the fuel cell to be the sum of the power required to keep the SOC value of the power battery greater than the first SOC value and the power required by the fuel cell vehicle.

[0071] The second energy management unit 32 is used to execute a winter secondary energy management strategy if it is determined that the current temperature is less than or equal to a second temperature threshold. The winter secondary energy management strategy includes controlling the output power of the fuel cell to be the sum of the power required to keep the SOC value of the power battery greater than the second SOC value and the power required by the fuel cell vehicle. The second SOC value is greater than the first SOC value.

[0072] Optionally, the energy management module 30 is also used to implement a winter energy management strategy for the fuel cell of the fuel cell vehicle if it is determined that the season of the location of the fuel cell vehicle is winter.

[0073] This invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the method in Embodiment 1 described above.

[0074] This invention also provides a computer-readable medium having processor-executable non-volatile program code that causes the processor to perform the method described in Embodiment 1 above.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for energy management of fuel cell vehicles, characterized in that, A vehicle controller used in fuel cell vehicles; including: The current temperature at the location of the fuel cell vehicle and the lowest ambient temperature within a preset future time period are obtained. Determine whether the minimum ambient temperature is less than or equal to the first temperature threshold; If so, a winter energy management strategy is implemented for the fuel cell of the fuel cell vehicle; the winter energy management strategy includes: controlling the output power of the fuel cell to be the sum of the power required to keep the SOC value of the power battery greater than the target SOC value and the power required by the fuel cell vehicle; the power battery is the power battery of the fuel cell vehicle; the target SOC value is the SOC value determined based on the current temperature; If not, then a normal temperature energy management strategy is implemented for the fuel cell of the fuel cell vehicle; the normal temperature energy management strategy is a strategy that matches the output power of the fuel cell with the power demand of the fuel cell vehicle. Before obtaining the current temperature at the location of the fuel cell vehicle and the lowest ambient temperature within a preset future time period, the method further includes: The location and current date of the fuel cell vehicle are obtained through the vehicle-to-everything (T-BOX) system of the fuel cell vehicle. Based on the location of the fuel cell vehicle and the current date, determine whether the season at the location of the fuel cell vehicle is winter; If so, the winter energy management strategy is executed on the fuel cell of the fuel cell vehicle; If not, obtain the current temperature of the location of the fuel cell vehicle and the lowest ambient temperature within a preset time period in the future; The winter energy management strategy includes a primary winter energy management strategy and a secondary winter energy management strategy. Implementing a winter energy management strategy for the fuel cell in the fuel cell vehicle includes: Determine whether the current temperature is less than or equal to a second temperature threshold; the second temperature threshold is less than the first temperature threshold. If not, then the winter level 1 energy management strategy is executed; the winter level 1 energy management strategy includes: controlling the output power of the fuel cell to be the sum of the power required to keep the SOC value of the power battery greater than the first SOC value and the power required by the fuel cell vehicle; If so, the winter secondary energy management strategy is executed; the winter secondary energy management strategy includes: controlling the output power of the fuel cell to be the sum of the power required to keep the SOC value of the power battery greater than the second SOC value and the power required by the fuel cell vehicle; The second SOC value is greater than the first SOC value.

2. The method according to claim 1, characterized in that, Obtaining the current temperature at the location of the fuel cell vehicle and the lowest ambient temperature within a preset future time period includes: The T-BOX vehicle networking system of the fuel cell vehicle obtains the current temperature of the location of the fuel cell vehicle and the lowest ambient temperature within a preset future time period.

3. An energy management system for fuel cell vehicles, characterized in that, include: The module consists of an acquisition module, a judgment module, and an energy management module; among which, The acquisition module is used to acquire the current temperature of the location of the fuel cell vehicle and the lowest ambient temperature within a preset time period in the future. The judgment module is used to determine whether the minimum ambient temperature is less than or equal to the first temperature threshold. The energy management module is configured to execute a winter energy management strategy for the fuel cell of the fuel cell vehicle if it is determined that the lowest ambient temperature is less than or equal to the first temperature threshold. The winter energy management strategy includes controlling the output power of the fuel cell to be the sum of the power required to maintain the SOC value of the power battery greater than the target SOC value and the power required by the fuel cell vehicle. The power battery is the power battery of the fuel cell vehicle. The target SOC value is the SOC value determined based on the current temperature. The energy management module is further configured to execute a normal temperature energy management strategy for the fuel cell of the fuel cell vehicle if it is determined that the minimum ambient temperature is greater than the first temperature threshold; the normal temperature energy management strategy is a strategy that matches the output power of the fuel cell with the power demand of the fuel cell vehicle. The fuel cell vehicle energy management system is also used for: The location and current date of the fuel cell vehicle are obtained through the vehicle-to-everything (T-BOX) system of the fuel cell vehicle. Based on the location of the fuel cell vehicle and the current date, determine whether the season at the location of the fuel cell vehicle is winter; If so, the winter energy management strategy is executed on the fuel cell of the fuel cell vehicle; If not, obtain the current temperature of the location of the fuel cell vehicle and the lowest ambient temperature within a preset time period in the future; The winter energy management strategy includes a primary winter energy management strategy and a secondary winter energy management strategy; the energy management module further includes: a first energy management unit and a second energy management unit; wherein... The first energy management unit is configured to execute the winter level 1 energy management strategy if it is determined that the current temperature is greater than the second temperature threshold. The winter level 1 energy management strategy includes controlling the output power of the fuel cell to be the sum of the power required to keep the SOC value of the power battery greater than the first SOC value and the power required by the fuel cell vehicle. The second temperature threshold is less than the first temperature threshold. The second energy management unit is used to execute the winter secondary energy management strategy if it is determined that the current temperature is less than or equal to the second temperature threshold. The winter secondary energy management strategy includes controlling the output power of the fuel cell to be the sum of the power required to keep the SOC value of the power battery greater than the second SOC value and the power required by the fuel cell vehicle. The second SOC value is greater than the first SOC value.

4. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method described in any one of claims 1 to 2.

5. A computer-readable medium having processor-executable non-volatile program code, characterized in that, The program code causes the processor to execute the method according to any one of claims 1-2.

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