An energy control method and device for a fuel cell vehicle, a vehicle, and a storage medium

Abstract

The application discloses an energy control method and device of a fuel cell vehicle, the vehicle and a storage medium. The method comprises the following steps: obtaining a state of charge of a power battery in the fuel cell vehicle and a demand power of the vehicle, wherein the fuel cell vehicle comprises the power battery and a fuel cell for power supply, the state of charge of the power battery represents a remaining capacity of the power battery, and the demand power of the vehicle represents a demand power for driving the fuel cell vehicle; determining a state of charge threshold of the power battery according to the demand power of the vehicle; when the state of charge is greater than the state of charge threshold, controlling the power battery output power of the power battery to meet the demand power of the vehicle; when the state of charge is less than or equal to the state of charge threshold, starting the fuel cell, and controlling the fuel cell output power of the fuel cell and the power battery output power of the power battery to meet the demand power of the vehicle according to a preset energy distribution strategy. The energy control method can solve the problem that hydrogen refueling is inconvenient during driving of the fuel cell vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicles, specifically to an energy control method, device, vehicle, and storage medium for a fuel cell vehicle. Background Technology

[0002] With increasing energy scarcity and growing environmental problems, new energy vehicles are receiving increasing attention in the automotive industry. New energy vehicles include pure electric vehicles, hybrid electric vehicles, and fuel cell vehicles. They can save energy and reduce carbon emissions, with fuel cell vehicles becoming increasingly widely used.

[0003] Fuel cell vehicles are powered by fuel cells and batteries. A fuel cell is an energy conversion device that uses the chemical reaction of hydrogen and oxygen to convert chemical energy into electrical or mechanical energy. Since the emission from the chemical reaction of hydrogen and oxygen is generally water, the exhaust gas produced by fuel cells does not contain NO. X SO X It does not produce harmful gases or carbon emissions; a power battery is a storage battery that can directly or indirectly provide power. When a power battery is charged and discharged, it generally produces gases such as hydrogen and oxygen. That is, a power battery does not produce harmful gases or CO2 when it is working.

[0004] Due to the issue of weak dynamic response in power batteries, current fuel cell vehicles primarily employ an energy control method that uses fuel cells as the main source and power batteries as a supplement. Specifically, the fuel cell mainly meets the power demands of vehicle operation, while the power battery assists in compensating for these power requirements.

[0005] Although the energy control method of using fuel cells as the primary power source and power batteries as a secondary power source can meet the power requirements of vehicle operation, fuel cells consume hydrogen when supplying power. Therefore, if fuel cells are used as the primary power source, fuel cell vehicles will need to refuel the fuel cells frequently. However, as a new energy vehicle that is not widely used, there are usually few existing hydrogen refueling stations. In other words, if fuel cells are used as the primary power source, there will be inconvenience in refueling hydrogen during operation. Summary of the Invention

[0006] This application provides an energy control method, device, vehicle, and storage medium for a fuel cell vehicle, which can solve the problems of weak dynamic response of power batteries and inconvenience of hydrogen refueling during driving.

[0007] In view of this, the first aspect of this application provides an energy control method for a fuel cell vehicle, the method comprising:

[0008] The state of charge of the power battery in the fuel cell vehicle and the total power demand of the vehicle are obtained. The fuel cell vehicle includes the power battery and the fuel cell for power supply. The state of charge of the power battery represents the remaining capacity of the power battery, and the total power demand of the vehicle represents the power demand required for the fuel cell vehicle to run.

[0009] Based on the required power of the vehicle, determine the charge state threshold of the power battery;

[0010] When the charge state is greater than the charge state threshold, the power output power of the power battery is controlled to meet the power requirements of the vehicle.

[0011] When the charge state is less than or equal to the charge state threshold, the fuel cell is started, and the fuel cell output power and the power battery output power are controlled according to the energy distribution strategy to meet the power requirements of the whole vehicle.

[0012] A second aspect of this application provides an energy control device for a fuel cell vehicle, the device comprising an acquisition unit, a determination unit, a first control unit, and a second control unit;

[0013] The acquisition unit is used to acquire the state of charge of the power battery in the fuel cell vehicle and the total power demand of the vehicle. The fuel cell vehicle includes the power battery and the fuel cell for power supply. The state of charge of the power battery represents the remaining capacity of the power battery, and the total power demand of the vehicle represents the power demand of the fuel cell vehicle for driving.

[0014] The determining unit is used to determine the charge state threshold of the power battery based on the vehicle's required power.

[0015] The first control unit is used to control the power battery output power of the power battery to meet the power requirements of the whole vehicle when the charge state is greater than the charge state threshold.

[0016] The second control unit is used to start the fuel cell when the charge state is less than or equal to the charge state threshold, and to control the fuel cell output power and the power battery output power to meet the vehicle's power requirements according to the energy distribution strategy.

[0017] A third aspect of this application provides a vehicle, including an energy control device for a fuel cell vehicle provided in this application.

[0018] A fourth aspect of this application provides a computer-readable medium storing executable instructions, which, when executed by a processor, implement an energy control method for a fuel cell vehicle provided in this application.

[0019] This application discloses an energy control method, device, vehicle, and storage medium for a fuel cell vehicle. The method includes: acquiring the state of charge (SOC) of the power battery in the fuel cell vehicle and the vehicle's required power. The fuel cell vehicle includes a power battery for power supply and a fuel cell. The SOC of the power battery represents the remaining capacity of the power battery, and the required power of the vehicle represents the power required for the fuel cell vehicle to operate. Based on the required power of the vehicle, a SOC threshold is determined for the power battery. This SOC threshold represents the minimum SOC value of the power battery to meet the required power of the vehicle. When the SOC is greater than the SOC threshold, it indicates that the power battery can dynamically respond, and the power battery output power is controlled to meet the required power of the vehicle. When the SOC is less than or equal to the SOC threshold, it indicates that the power battery has a problem with weak dynamic response. The fuel cell is then started, and the fuel cell output power and the power battery output power are controlled according to a preset energy distribution strategy to meet the required power of the vehicle, with the fuel cell output power compensating for the power battery output power. Using the above method, when the state of charge of the power battery is high, i.e., when the power battery can respond dynamically, the power battery is used for power supply; when the state of charge of the power battery is low, i.e. when the power battery has a problem with weak dynamic response, the fuel cell is started, and the fuel cell and the power battery work together to supply power. Since there are many charging stations for the power battery during vehicle operation, the vehicle can be conveniently charged along the way. Therefore, the energy control method of the present application, which uses the power battery as the main component and the fuel cell as the auxiliary component, can solve the problem of inconvenient hydrogen refueling during fuel cell vehicle operation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 A flowchart illustrating an energy control method for a fuel cell vehicle provided in this application embodiment;

[0022] Figure 2 Schematic diagrams illustrating energy control methods for fuel cell vehicles under different conditions as provided in embodiments of this application;

[0023] Figure 3 This is a schematic diagram of an energy control device for a fuel cell vehicle, provided as another embodiment of this application. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0025] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] Before providing a further detailed description of the embodiments of this application, the nouns and terms involved in the embodiments of this application will be explained, and the nouns and terms involved in the embodiments of this application shall be interpreted as follows.

[0027] State of Charge (SOC), also known as remaining charge, represents the ratio of the remaining dischargeable charge of a battery after a period of use or long-term storage to its fully charged state. It is usually expressed as a percentage and its value ranges from 0 to 1. When SOC = 0, the battery is fully discharged, and when SOC = 1, the battery is fully charged.

[0028] Fuel cell vehicles are powered by both fuel cells and batteries. However, batteries suffer from dynamic response fatigue; specifically, when the State of Charge (SOC) is low, the battery's maximum output power decreases. This means that at lower SOCs, the battery's output power may not meet the vehicle's power requirements. Therefore, current fuel cell vehicles primarily employ an energy control method where the fuel cell is the primary source and the battery is secondary. In other words, the fuel cell mainly provides the power required for vehicle operation, while the battery assists in compensating for this power demand.

[0029] Although the energy control method of using fuel cells as the primary power source and power batteries as a secondary power source can meet the power requirements of vehicle operation, fuel cells consume hydrogen when supplying power. Therefore, if fuel cells are used as the primary power source, fuel cell vehicles will need to refuel the fuel cells frequently. However, as a new energy vehicle that is not widely used, there are usually few existing hydrogen refueling stations. In other words, if fuel cells are used as the primary power source, there will be problems with the inconvenience of refueling hydrogen during driving, which will affect the vehicle's driving range or driving route.

[0030] In view of this, embodiments of this application provide an energy control method, device, vehicle, and storage medium for a fuel cell vehicle, which can solve the problems of weak dynamic response of the power battery and inconvenience of refueling hydrogen during driving.

[0031] The energy control method for a fuel cell vehicle provided in this application will be described below through method embodiments, such as... Figure 1 As shown, Figure 1 This application provides a flowchart of an energy control method for a fuel cell vehicle, which includes the following steps:

[0032] S101. Obtain the state of charge of the power battery in the fuel cell vehicle and the total power demand of the vehicle. The fuel cell vehicle includes a power battery for power supply and a fuel cell. The state of charge of the power battery represents the remaining capacity of the power battery, and the total power demand of the vehicle represents the power demand required for the fuel cell vehicle to run.

[0033] Specifically, the technical solution provided in this application is applicable to fuel cell vehicles with fuel cells and power batteries. Since the maximum power of the power battery is related to the state of charge of the power battery, when the maximum power of the power battery is low, the power battery will have a problem of weak dynamic response. Therefore, obtaining the state of charge of the power battery in the fuel cell vehicle in S101 can be used as a basis for accurately determining whether the current power battery may have a weak dynamic response.

[0034] The total vehicle power requirement represents the power required for the fuel cell vehicle to operate. During operation, the fuel cell or power battery needs to work to meet the total vehicle power requirement. Since the total vehicle power requirement is related to factors such as vehicle weight and speed, it is not a fixed quantity. Therefore, the total vehicle power requirement needs to be obtained from S101 to determine the power requirement for the fuel cell vehicle to operate at the current time.

[0035] S102. Determine the charge state threshold of the power battery based on the power requirements of the vehicle.

[0036] Specifically, as mentioned earlier, the vehicle power demand represents the power required for the fuel cell vehicle to operate. If the power battery is to meet the vehicle power demand on its own, the maximum power of the power battery needs to be able to meet the vehicle power demand. Since the maximum power of the power battery is related to the state of charge of the power battery, the state of charge threshold of the power battery can be determined based on the vehicle power demand. The state of charge threshold of the power battery represents the minimum state of charge value that can meet the current vehicle power demand. The higher the vehicle power demand, the greater the maximum power of the power battery required to supply power on its own, and the greater the corresponding state of charge threshold. That is, the vehicle power demand and the state of charge threshold of the power battery are positively correlated.

[0037] Optionally, the state of charge threshold of the power battery can be determined based on the vehicle power demand and state of charge threshold table, which represents the correspondence between the vehicle power demand and the state of charge threshold of the fuel cell vehicle.

[0038] Specifically, as mentioned earlier, the state of charge threshold represents the minimum state of charge value that can meet the current power demand of the vehicle. Therefore, a state of charge threshold table can be pre-set, which represents the correspondence between the power demand of the fuel cell vehicle and the state of charge threshold. During vehicle operation, the state of charge threshold can be accurately determined based on the power demand of the vehicle and the state of charge threshold table.

[0039] It should be noted that the state of charge threshold table can be set by conducting corresponding calibration experiments on fuel cell vehicles in advance. Specifically, the battery status and vehicle power demand of the fuel cell vehicle can be obtained in real time. When the power battery cannot meet the current vehicle power demand, a set of corresponding relationships can be generated in the state of charge threshold table based on the current state of charge and the vehicle power demand.

[0040] S103. When the state of charge is greater than the state of charge threshold, control the power output power of the power battery to meet the power requirements of the vehicle; when the state of charge is less than or equal to the state of charge threshold, start the fuel cell, and control the output power of the fuel cell and the power battery to meet the power requirements of the vehicle according to the energy distribution strategy.

[0041] Specifically, since the state of charge of the power battery is positively correlated with its maximum power, when the vehicle is in motion and the power battery is used as the main power source, as the state of charge of the power battery decreases with the discharge behavior, the corresponding maximum power of the power battery will also decrease. The power battery will be unable to dynamically respond because its output power cannot meet the power demand of the vehicle. When the power demand of the vehicle increases, the output power of the power battery will also be unable to meet the increased power demand of the vehicle. Therefore, the energy control mode of the fuel cell vehicle can be switched according to the state of charge of the power battery and the state of charge threshold.

[0042] When the state of charge of the power battery is greater than the state of charge threshold, since the state of charge threshold represents the minimum state of charge value that can meet the current power demand of the vehicle, the state of charge of the power battery being greater than the state of charge threshold means that the maximum power of the power battery can meet the power demand of the vehicle. In other words, fuel cell vehicles using power batteries will not have the problem of dynamic response fatigue, and the power output power can be controlled to meet the power demand of the vehicle.

[0043] When the state of charge (SOC) of the power battery is less than or equal to the SOC threshold, it may be due to a sudden acceleration of the fuel cell vehicle or an increase in vehicle weight leading to increased power demand, or it may be due to the power battery discharging, resulting in a decrease in the SOC. In this situation, the maximum power of the power battery cannot meet the power demand for vehicle operation. For safe vehicle operation, the fuel cell can be activated, and the output power of the fuel cell and the power battery can be controlled according to an energy distribution strategy to meet the power demand of the vehicle. In other words, the fuel cell compensates for the power output of the power battery to meet the power demand of the vehicle, thus solving the problem of weak dynamic response of the power battery.

[0044] Optionally, the above-mentioned control of the fuel cell output power and power battery output power to meet the vehicle's power requirements according to the energy distribution strategy includes:

[0045] The maximum power of the power battery and the minimum power of the fuel cell are obtained. The maximum power of the power battery represents the maximum power of the power battery in a charged state, and the minimum power of the fuel cell represents the minimum power of the fuel cell for stable operation.

[0046] When the power demand of the vehicle is less than or equal to the sum of the maximum power of the power battery and the minimum power of the fuel cell, but greater than the minimum power of the fuel cell, the fuel cell is controlled to output power based on the minimum power of the fuel cell.

[0047] When the power demand of the vehicle is greater than the sum of the maximum power of the power battery and the minimum power of the fuel cell, the power battery is controlled to output power based on the maximum power of the power battery.

[0048] Specifically, since a fuel cell is a device that uses the chemical reaction of hydrogen and oxygen to convert chemical energy into electrical energy, in order for the fuel cell to operate stably after startup, the output power of the fuel cell cannot be adjusted to zero like that of a power battery. Instead, it should operate at the minimum power of the fuel cell or at an output power greater than the minimum power of the fuel cell.

[0049] As mentioned earlier, the output power of a power battery is related to its state of charge. When the state of charge of the power battery is large, the power that the power battery can output is high. The maximum power of the power battery can be used to represent the maximum power of the power battery under the current state of charge.

[0050] First, the maximum power of the power battery and the minimum power of the fuel cell are obtained. When the vehicle's required power is less than or equal to the sum of the maximum power of the power battery and the minimum power of the fuel cell, but greater than the minimum power of the fuel cell, the fuel cell can be controlled to output at its minimum power, while the power battery outputs at the difference between the vehicle's required power and the fuel cell's minimum power to meet the vehicle's required power. When the vehicle's required power is greater than the sum of the maximum power of the power battery and the minimum power of the fuel cell, the power battery can be controlled to output at its maximum power, while the fuel cell outputs at the difference between the vehicle's required power and the power battery's maximum power to meet the vehicle's required power. This energy distribution strategy allows the fuel cell to operate stably at its minimum power after startup, with the power battery as the primary source and the fuel cell as a secondary source to meet the vehicle's required power.

[0051] Optionally, after starting the fuel cell, obtain the minimum power of the fuel cell;

[0052] When the minimum power of the fuel cell is greater than the power required by the vehicle, the fuel cell is controlled to output power based on the minimum power of the fuel cell, and the power battery is controlled to charge based on the difference between the minimum power of the fuel cell and the power required by the vehicle.

[0053] Specifically, for stable operation of the fuel cell, it should output at least its minimum power. When the minimum power of the fuel cell exceeds the power required by the vehicle, to facilitate energy recycling, the fuel cell can be controlled to output power based on its minimum power, and the power battery can be charged based on the difference between the minimum power of the fuel cell and the power required by the vehicle. This method allows the fuel cell to use its minimum power, in addition to providing power to the vehicle, to charge the power battery when its minimum power exceeds the vehicle's power requirement, thus achieving energy recycling and improving energy efficiency.

[0054] Optionally, the fuel cell can be shut down when the state of charge is greater than a preset shutdown threshold.

[0055] Specifically, since the power battery can be charged by the fuel cell while driving and can also be charged at a charging station when parked, when the power battery's state of charge exceeds a preset shutdown threshold, it indicates that the power battery is sufficiently charged. Because factors affecting the vehicle's power demand, such as vehicle weight and speed, cannot increase indefinitely, the maximum output power of the power battery at this point can meet the vehicle's power requirements. Therefore, the fuel cell can be shut down to enter a hot standby state, which is a state where the fuel cell can be started instantaneously when needed. By controlling the fuel cell to shut down when the power battery is sufficiently charged, the power output of the fuel cell can be reduced, and the standby time of the fuel cell can be increased.

[0056] It should be noted that, for the sake of vehicle driving safety, in order to enable the power battery to independently meet the power demand of the whole vehicle, a preset shutdown state threshold can be set in advance according to the power demand of the whole vehicle under extreme driving conditions (the vehicle weight reaches its maximum and the vehicle speed reaches its maximum).

[0057] The following analysis examines the power output of the fuel cell and power battery under different conditions using an energy control method for a fuel cell vehicle provided in this application embodiment. Figure 2 As shown, Figure 2 This is a schematic diagram illustrating the energy control methods for fuel cell vehicles under different conditions provided in the embodiments of this application. Figure 2 The four curves represent the vehicle power demand, power battery power, power battery SOC, and FCS net output power, respectively. Among them, the vehicle power demand is the power required for the fuel cell vehicle to run, which is the total vehicle power demand mentioned above. The FCS net output power is the output power of the fuel cell.

[0058] ① When the SOC of the power battery is greater than the charge state threshold, the power battery power is controlled to meet the power demand of the vehicle, that is, the fuel cell vehicle drives the vehicle in pure electric mode powered by the power battery.

[0059] ②As the battery SOC decreases as the vehicle travels, the maximum power of the power battery will decrease accordingly. When the power battery SOC is less than or equal to the state of charge threshold, the fuel cell may require a certain amount of power to start. Therefore, in addition to meeting the power requirements of the vehicle, the power battery also needs to provide a certain amount of power to start the fuel cell.

[0060] ③ After the fuel cell is started, when the vehicle's power demand is less than or equal to the sum of the maximum power of the power battery and the minimum power of the fuel cell, but greater than the minimum power of the fuel cell, the fuel cell will operate stably at its minimum power. The power battery power will be as follows: Figure 2 ③ As shown, it changes with the vehicle's power demand.

[0061] ④ As user needs for vehicles change, the required power of vehicles continues to increase, such as Figure 2 As shown, when the vehicle's power demand exceeds the sum of the maximum power of the power battery and the minimum power of the fuel cell, the power battery is controlled to output at its maximum power, and the fuel cell... Figure 2 As shown in ④, it changes with the vehicle's power demand.

[0062] ⑤ As the vehicle's power demand decreases, the power battery outputs its maximum power, while the fuel cell gradually decreases in power output along with the vehicle.

[0063] ⑥ When the vehicle's power demand decreases to less than or equal to the sum of the maximum power of the power battery and the minimum power of the fuel cell, the fuel cell operates stably at its minimum power, and the power battery power is as follows: Figure 2 As shown in ⑥, it changes according to the vehicle's power demand.

[0064] ⑦ When the vehicle's power demand drops below the fuel cell's minimum power, the fuel cell operates stably at its minimum power, and the excess power output by the fuel cell charges the power battery.

[0065] ⑧ When the SOC of the power battery exceeds the preset shutdown threshold, the fuel cell shuts down and enters a hot standby state, allowing the vehicle to continue to be driven by the power battery.

[0066] It should be noted that, Figure 2 The maximum power of a fuel cell refers to Figure 2 The maximum power achieved by the fuel cell in the middle does not refer to the maximum power that the fuel cell can achieve during actual vehicle operation. The maximum power of the power battery is... Figure 2 The horizontal line in the middle is just a schematic diagram, used to more intuitively illustrate the relationship between the power of the power battery, the power of the fuel cell, and the power required by the vehicle. In actual vehicle operation, the maximum power of the power battery changes with the state of charge (SOC) of the power battery.

[0067] In summary, this application discloses an energy control method for a fuel cell vehicle. The method includes: acquiring the state of charge (SOP) of the power battery within the fuel cell vehicle and the vehicle's required power. The fuel cell vehicle includes a power battery for power supply and a fuel cell. The SOP represents the remaining capacity of the power battery, and the required power represents the power required for the fuel cell vehicle to operate. Based on the required power, a SOP threshold is determined for the power battery, which represents the minimum SOP value required to meet the vehicle's required power. When the SOP is greater than the SOP threshold, it indicates that the power battery can dynamically respond, and the power battery output power is controlled to meet the vehicle's required power. When the SOP is less than or equal to the SOP threshold, it indicates that the power battery has a weak dynamic response. The fuel cell is then activated, and the fuel cell output power and the power battery output power are controlled according to a preset energy distribution strategy to meet the vehicle's required power, with the fuel cell output power compensating for the power battery output power. Using the above method, when the state of charge of the power battery is high, i.e., when the power battery can respond dynamically, the power battery is used for power supply; when the state of charge of the power battery is low, i.e. when the power battery has a problem with weak dynamic response, the fuel cell is started, and the fuel cell and the power battery work together to supply power. Since there are many charging stations for the power battery during vehicle operation, the vehicle can be conveniently charged along the way. Therefore, the energy control method of the present application, which uses the power battery as the main component and the fuel cell as the auxiliary component, can solve the problem of inconvenient hydrogen refueling during fuel cell vehicle operation.

[0068] Another embodiment of this application provides an energy control device for a fuel cell vehicle, such as... Figure 3 As shown, Figure 3 This is a schematic diagram of an energy control device for a fuel cell vehicle according to another embodiment of the present application. The device includes an acquisition unit 301, a determination unit 302, a first control unit 303, and a second control unit 304.

[0069] The acquisition unit is used to acquire the state of charge of the power battery in the fuel cell vehicle and the total power demand of the vehicle. The fuel cell vehicle includes a power battery for power supply and a fuel cell. The state of charge of the power battery represents the remaining capacity of the power battery, and the total power demand of the vehicle represents the power demand required for the fuel cell vehicle to operate.

[0070] The determination unit is used to determine the charge state threshold of the power battery based on the power requirements of the vehicle.

[0071] The first control unit is used to control the power battery output power to meet the vehicle's power requirements when the charge state is greater than the charge state threshold.

[0072] The second control unit is used to start the fuel cell when the state of charge is less than or equal to the state of charge threshold, and to control the fuel cell output power and the power battery output power to meet the vehicle's power requirements according to the energy distribution strategy.

[0073] Optionally, in another embodiment of the energy control device for a fuel cell vehicle provided in this application, a second control unit is used to obtain the maximum power of the power battery and the minimum power of the fuel cell. The maximum power of the power battery represents the maximum power of the power battery in a charged state, and the minimum power of the fuel cell represents the minimum power of the fuel cell for stable operation. When the power demand of the vehicle is less than or equal to the sum of the maximum power of the power battery and the minimum power of the fuel cell, but greater than the minimum power of the fuel cell, the fuel cell is controlled to output power based on the minimum power of the fuel cell. When the power demand of the vehicle is greater than the sum of the maximum power of the power battery and the minimum power of the fuel cell, the power battery is controlled to output power based on the maximum power of the power battery.

[0074] Optionally, in another embodiment of the present application, an energy control device for a fuel cell vehicle includes a determining unit for determining the state of charge threshold of the power battery based on a table of vehicle power demand and state of charge thresholds, wherein the state of charge threshold table represents the correspondence between vehicle power demand and state of charge threshold.

[0075] Optionally, in another embodiment of the present application, an energy control device for a fuel cell vehicle is provided, wherein the second control unit is further configured to obtain the minimum power of the fuel cell after the fuel cell is started; when the minimum power of the fuel cell is greater than the required power of the vehicle, control the fuel cell to output power based on the minimum power of the fuel cell, and control the power battery to charge based on the difference between the minimum power of the fuel cell and the required power of the vehicle.

[0076] Optionally, in another embodiment of the present application, an energy control device for a fuel cell vehicle further includes a third control unit, used to control the fuel cell to shut down when the charge state is greater than a preset shutdown state threshold.

[0077] It should be noted that the specific working process of each module provided in the above embodiments of this application can be referred to the corresponding implementation methods in the above method embodiments, and will not be repeated here.

[0078] Another embodiment of this application provides a vehicle that includes the apparatus described in the above-described apparatus embodiments.

[0079] Another embodiment of this application provides a computer-readable storage medium storing executable instructions for implementing the methods described in the above-described method embodiments when executed by a processor.

[0080] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0081] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An energy control method for a fuel cell vehicle, characterized in that, The method includes: The state of charge of the power battery in the fuel cell vehicle and the total power demand of the vehicle are obtained. The fuel cell vehicle includes the power battery and the fuel cell for power supply. The state of charge of the power battery represents the remaining capacity of the power battery, and the total power demand of the vehicle represents the power demand required for the fuel cell vehicle to run. According to the table of vehicle power demand and state of charge threshold, the state of charge threshold of the power battery is determined. The table of state of charge threshold represents the correspondence between the vehicle power demand and the state of charge threshold. The state of charge threshold represents the minimum state of charge value that can meet the current vehicle power demand. The vehicle power demand is positively correlated with the state of charge threshold. The correspondence is determined in advance through calibration tests on the fuel cell vehicle. When the charge state is greater than the charge state threshold, the power output power of the power battery is controlled to meet the power requirements of the vehicle. When the charge state is less than or equal to the charge state threshold, the fuel cell is started, and the maximum power of the power battery and the minimum power of the fuel cell are obtained. The maximum power of the power battery represents the maximum power of the power battery under the charge state, and the minimum power of the fuel cell represents the minimum power of the fuel cell for stable operation. When the total vehicle power demand is less than or equal to the sum of the maximum power of the power battery and the minimum power of the fuel cell, and greater than the minimum power of the fuel cell, the fuel cell is controlled to output power based on the minimum power of the fuel cell. When the required power of the vehicle is greater than the sum of the maximum power of the power battery and the minimum power of the fuel cell, the power battery is controlled to output power based on the maximum power of the power battery.

2. The method according to claim 1, characterized in that, After starting the fuel cell, the method further includes: Obtain the minimum power of the fuel cell; When the minimum power of the fuel cell is greater than the required power of the vehicle, the fuel cell is controlled to output power based on the minimum power of the fuel cell, and the power battery is controlled to charge based on the difference between the minimum power of the fuel cell and the required power of the vehicle.

3. The method according to any one of claims 1-2, characterized in that, The method further includes: When the charge state is greater than a preset shutdown state threshold, the fuel cell is controlled to shut down.

4. An energy control device for a fuel cell vehicle, characterized in that, The device includes an acquisition unit, a determination unit, a first control unit, and a second control unit; The acquisition unit is used to acquire the state of charge of the power battery in the fuel cell vehicle and the total power demand of the vehicle. The fuel cell vehicle includes the power battery and the fuel cell for power supply. The state of charge of the power battery represents the remaining capacity of the power battery, and the total power demand of the vehicle represents the power demand of the fuel cell vehicle for driving. The determining unit is used to determine the state of charge threshold of the power battery according to the vehicle power demand and state of charge threshold table. The state of charge threshold table represents the correspondence between the vehicle power demand and the state of charge threshold. The state of charge threshold represents the minimum state of charge value that can meet the current vehicle power demand. The vehicle power demand is positively correlated with the state of charge threshold. The correspondence is determined in advance through calibration tests on the fuel cell vehicle. The first control unit is used to control the power battery output power of the power battery to meet the power requirements of the whole vehicle when the charge state is greater than the charge state threshold. The second control unit is used to start the fuel cell when the charge state is less than or equal to the charge state threshold, and to obtain the maximum power of the power battery and the minimum power of the fuel cell, wherein the maximum power of the power battery represents the maximum power of the power battery in the charge state, and the minimum power of the fuel cell represents the minimum power of the fuel cell for stable operation. When the total vehicle power demand is less than or equal to the sum of the maximum power of the power battery and the minimum power of the fuel cell, and greater than the minimum power of the fuel cell, the fuel cell is controlled to output power based on the minimum power of the fuel cell. When the required power of the vehicle is greater than the sum of the maximum power of the power battery and the minimum power of the fuel cell, the power battery is controlled to output power based on the maximum power of the power battery.

5. A vehicle, characterized in that, Includes the energy control device for the fuel cell vehicle as described in claim 4.

6. A computer-readable storage medium, characterized in that, It stores executable instructions for use by a processor to implement the energy control method for a fuel cell vehicle as described in any one of claims 1 to 3.

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