Fuel cell low temperature starting method, device, equipment and storage medium

Abstract

The present application relates to the technical field of vehicle control, and particularly relates to a fuel cell low-temperature starting method, device, equipment and storage medium, the present application judges whether the current internal temperature of the vehicle power battery is less than the normal starting temperature threshold value, when the current internal temperature is less than the normal starting temperature threshold value, it indicates that the temperature of the vehicle battery pack is low, and the charging capacity is limited, at this time, the whole vehicle demand power and the minimum output power of the fuel cell are compared, and then the low-temperature starting strategy corresponding to the comparison result of the fuel cell starting is controlled, so that the frequent start-stop of the fuel cell starting due to the influence of the power battery charging capacity is avoided, and the technical problem that the fuel cell of the light truck in the prior art will be frequently started and stopped when starting at low temperature is avoided.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and in particular to a method, apparatus, device, and storage medium for low-temperature start-up of a fuel cell. Background Technology

[0002] With the development of fuel cells, new energy vehicles have gradually expanded from the bus market to the truck market. However, for fuel cell-powered new energy trucks, the slow heating of the battery during charging in low-temperature environments means that the fuel cell is started as soon as the charging capacity of the power battery meets the requirements, which leads to frequent starts of the fuel cell and reduces the service life of the vehicle.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this invention is to provide a method, apparatus, device, and storage medium for starting a fuel cell at low temperatures, aiming to solve the technical problem of frequent start-stop cycles in fuel cells of light trucks during low-temperature startup.

[0005] To achieve the above objectives, the present invention provides a method for low-temperature start-up of a fuel cell, the method comprising the following steps:

[0006] Obtain the current internal temperature of the target vehicle's power battery, the minimum output power of the fuel cell, and the power required by the entire vehicle;

[0007] When the current internal temperature is lower than the normal start-up temperature threshold, compare the vehicle's required power with the fuel cell's minimum output power.

[0008] The fuel cell is started according to the low-temperature start-up strategy corresponding to the comparison results.

[0009] Optionally, starting the fuel cell according to the low-temperature start-up strategy corresponding to the comparison results includes:

[0010] The power battery provides the power required by the entire vehicle.

[0011] When the total power demand of the vehicle is less than the minimum output power of the fuel cell, the fuel cell is controlled to start based on a first low-temperature start-up strategy.

[0012] When the required power of the vehicle is greater than or equal to the minimum output power of the fuel cell, the fuel cell is controlled to start based on a second low-temperature start-up strategy, and the minimum charge capacity of the target vehicle's power battery under the second low-temperature start-up strategy is greater than the minimum charge capacity under the first low-temperature start-up strategy.

[0013] Optionally, controlling the fuel cell to start based on a first cryogenic start-up strategy includes:

[0014] When the charge capacity of the power battery is less than the first charge capacity threshold, it is determined whether the fuel cell meets the preset low temperature start-up conditions.

[0015] If so, then the fuel cell is started.

[0016] Optionally, controlling the fuel cell to start based on a second cryogenic start-up strategy includes:

[0017] When the charge capacity of the power battery is less than the second charge capacity threshold, it is determined whether the fuel cell meets the preset low temperature start-up conditions, wherein the second charge capacity threshold is greater than the first charge capacity threshold.

[0018] If so, then the fuel cell is started.

[0019] Optionally, the fuel cell low-temperature start-up method further includes:

[0020] When the current internal temperature is greater than or equal to the normal start-up temperature threshold, the power battery provides the power required by the vehicle.

[0021] When the charge capacity of the power battery is less than the third charge capacity threshold and the fuel cell meets the preset low temperature start-up conditions, the fuel cell is started, wherein the third charge capacity threshold is greater than the second charge capacity threshold.

[0022] Optionally, the determination of the preset low-temperature start-up condition includes:

[0023] The charging power of the power battery and the regenerative braking power of the target vehicle are obtained.

[0024] When the sum of the charging power of the power battery and the required power of the vehicle is not less than the sum of the regenerative braking power and the minimum output power of the fuel cell, the fuel cell is determined to meet the preset low-temperature start-up conditions.

[0025] When the sum of the charging power of the power battery and the required power of the vehicle is less than the sum of the regenerative braking power and the minimum output power of the fuel cell, it is determined that the fuel cell does not meet the preset low-temperature start-up conditions.

[0026] Optionally, the fuel cell low-temperature start-up method further includes:

[0027] The target internal temperature of the power battery is determined based on the charging power of the power battery and the minimum power of the fuel cell. The target internal temperature is the temperature at which the fuel cell starts normally.

[0028] The normal startup temperature threshold is determined based on the target internal temperature and the preset redundancy temperature.

[0029] Furthermore, to achieve the above objectives, the present invention also proposes a fuel cell cryogenic start-up device, the fuel cell cryogenic start-up device comprising:

[0030] The acquisition module is used to acquire the current internal temperature of the target vehicle's power battery, the minimum output power of the fuel cell, and the power required by the entire vehicle.

[0031] The comparison module is used to compare the required power of the vehicle with the minimum output power of the fuel cell when the current internal temperature is lower than the normal start-up temperature threshold.

[0032] The startup module is used to start the fuel cell according to the low-temperature startup strategy corresponding to the comparison results.

[0033] Furthermore, to achieve the above objectives, the present invention also proposes a fuel cell cryogenic start-up device, which includes: a memory, a processor, and a fuel cell cryogenic start-up program stored in the memory and executable on the processor. The fuel cell cryogenic start-up program is configured to implement the steps of the fuel cell cryogenic start-up method described above.

[0034] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing a fuel cell low-temperature start-up program, which, when executed by a processor, implements the steps of the fuel cell low-temperature start-up method described above.

[0035] This invention discloses a low-temperature start-up method for fuel cells. The method includes: acquiring the current internal temperature of the target vehicle's power battery, the minimum output power of the fuel cell, and the vehicle's required power; when the current internal temperature is lower than a normal start-up temperature threshold, comparing the vehicle's required power with the fuel cell's minimum output power; and starting the fuel cell according to a low-temperature start-up strategy corresponding to the comparison result. Compared with the prior art, this invention determines whether the current internal temperature of the vehicle's power battery is lower than the normal start-up temperature threshold. When the current internal temperature is lower than the normal start-up temperature threshold, it indicates that the vehicle's battery pack temperature is low and its charging capacity is limited. At this time, comparing the vehicle's required power with the fuel cell's minimum output power allows for the control of a low-temperature start-up strategy corresponding to the fuel cell start-up comparison result. This avoids frequent start-stop cycles during fuel cell startup due to the influence of the power battery's charging capacity, thus avoiding the technical problem of frequent start-stop cycles in fuel cells of light trucks during low-temperature startup in the prior art. Attached Figure Description

[0036] Figure 1This is a schematic diagram of the structure of a fuel cell cryogenic start-up device in the hardware operating environment of the embodiment of the present invention;

[0037] Figure 2 This is a schematic flowchart of the first embodiment of the fuel cell low-temperature start-up method of the present invention;

[0038] Figure 3 This is a schematic flowchart of the second embodiment of the fuel cell low-temperature start-up method of the present invention;

[0039] Figure 4 This is a schematic diagram of the overall process of a low-temperature start-up method for a fuel cell according to an embodiment of the present invention.

[0040] Figure 5 This is a structural block diagram of the first embodiment of the fuel cell cryogenic start-up device of the present invention.

[0041] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0043] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of a fuel cell cryogenic start-up device in the hardware operating environment of an embodiment of the present invention.

[0044] like Figure 1 As shown, the fuel cell cryogenic start-up device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be high-speed random access memory (RAM) or stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0045] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the cryogenic start-up device for fuel cells and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0046] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a fuel cell cryogenic start-up program.

[0047] exist Figure 1 In the fuel cell cryogenic start-up device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the fuel cell cryogenic start-up device of the present invention can be set in the fuel cell cryogenic start-up device, and the fuel cell cryogenic start-up device calls the fuel cell cryogenic start-up program stored in the memory 1005 through the processor 1001 and executes the fuel cell cryogenic start-up method provided in the embodiment of the present invention.

[0048] This invention provides a method for low-temperature start-up of a fuel cell, referring to... Figure 2 , Figure 2 This is a schematic flowchart of the first embodiment of a fuel cell low-temperature start-up method according to the present invention.

[0049] In this embodiment, the fuel cell low-temperature start-up method includes the following steps:

[0050] Step S10: Obtain the current internal temperature of the target vehicle's power battery, the minimum output power of the fuel cell, and the total power required by the vehicle.

[0051] It should be noted that the execution subject of the method in this embodiment can be a device with data acquisition, data processing and program execution functions, such as an in-vehicle controller or a vehicle controller, or other devices that can achieve the same or similar functions. This embodiment does not impose specific limitations on this. In this embodiment and the following embodiments, a vehicle controller will be used as an example for explanation.

[0052] It is worth noting that the target vehicle in this embodiment mainly refers to a light truck that is equipped with both a fuel cell and a power battery. In traditional technology, for fuel cell light trucks, due to the limited space in the vehicle layout and the desire to avoid occupying too much cargo space, only small-capacity power batteries can be selected. However, in low-temperature environments, small-capacity batteries have low charging capacity and slow self-heating, resulting in a relatively slow charging rate for the power battery. This makes it impossible to store the electrical energy generated by the fuel cell, and the vehicle controller will control the fuel cell to shut down. However, the vehicle needs the battery to provide power to start, so the fuel cell will repeatedly start and stop in a short period of time, affecting the service life of the vehicle.

[0053] In this embodiment, a fuel cell is a device that converts chemical energy into electrical energy. It generally uses hydrogen as fuel and oxygen as an oxidant to generate electrical energy through an electrochemical reaction. This energy is typically used to drive a car and can operate independently. The power battery is mainly used to store electrical energy. In this embodiment, it is mainly used to store the additional electrical energy generated by the fuel cell and can also be used to drive the car. Generally, the fuel cell provides the power demand of the entire vehicle, and this embodiment does not impose any specific limitations on this.

[0054] It is understandable that the battery pack is composed of multiple battery cells. During the charging and discharging process of the battery pack, the amount of charge stored in each battery cell is different, and the heat generated during charging and discharging is also different, resulting in temperature differences among the battery cells. In order to better determine whether the vehicle needs to activate low-temperature start control, the current internal temperature of the power battery in this embodiment can be the average temperature of each battery cell in the battery pack. Due to the influence of the low-temperature environment, it can also be the lowest temperature of each battery cell. This embodiment does not impose specific limitations on this.

[0055] In addition, the power requirements of the entire vehicle include, but are not limited to, the power of the vehicle motor, the power of each load, and the power of the thermal management system.

[0056] Step S20: When the current internal temperature is lower than the normal start-up temperature threshold, compare the vehicle's required power with the fuel cell's minimum output power.

[0057] It should be understood that the normal start-up temperature threshold is used to determine whether the battery pack is in a low-temperature environment. The normal start-up temperature threshold is determined by the charging capacity of the power battery and the minimum power point of the fuel cell. When the charging capacity of the power battery is greater than the minimum power point of the fuel cell, a lower normal start-up temperature threshold can adapt to the low-temperature environment.

[0058] In practice, when the current internal temperature of the battery pack is lower than the normal start-up temperature threshold, the operation of the fuel cell is controlled according to the low-temperature start-up strategy; when the current internal temperature of the battery pack is greater than or equal to the normal start-up temperature threshold, the fuel cell system is started according to the normal strategy. Based on the actual operating conditions of the vehicle, a control strategy is formulated to maintain the power battery charge at about 65% during vehicle operation. That is, under normal circumstances, the battery charge will be maintained at about 65% each time the vehicle is started.

[0059] Furthermore, in order to prevent the fuel cell from frequently entering the low-temperature start-up logic, in this embodiment, the target internal temperature of the power battery can be determined according to the charging power of the power battery and the minimum power of the fuel cell. The target internal temperature is the temperature at which the fuel cell starts normally. The normal start-up temperature threshold is determined according to the target internal temperature and the preset redundancy temperature. The preset redundancy temperature can be set to 1 degree Celsius or 3 degrees Celsius. This embodiment does not impose specific restrictions on this.

[0060] Step S30: Start the fuel cell according to the low-temperature start-up strategy corresponding to the comparison results.

[0061] In this embodiment, there are two low-temperature start-up strategies. In both strategies, the power battery first consumes electrical energy to raise the temperature until the charge capacity of the power battery reaches the corresponding charge capacity threshold under the low-temperature start-up strategy.

[0062] This embodiment determines whether the current internal temperature of the vehicle's power battery is lower than the normal start-up temperature threshold. When the current internal temperature is lower than the normal start-up temperature threshold, it indicates that the temperature of the vehicle's battery pack is low and its charging capacity is limited. At this time, the required power of the vehicle and the minimum output power of the fuel cell are compared, and then the low-temperature start-up strategy corresponding to the start-up comparison result of the fuel cell is controlled. This avoids frequent start-stops due to the influence of the power battery's charging capacity when the fuel cell starts, thus avoiding the technical problem of frequent start-stops of fuel cells in existing light trucks when starting at low temperatures.

[0063] refer to Figure 3 , Figure 3 This is a schematic flowchart of a second embodiment of a fuel cell low-temperature start-up method according to the present invention.

[0064] Based on the first embodiment described above, in this embodiment, step S30 includes:

[0065] Step S301: Provide the required power for the entire vehicle through the power battery.

[0066] It should be noted that since the power battery stores a certain amount of electrical energy, after the vehicle starts, the fuel cell is in a stopped state. At this time, in order not to affect the normal operation of the vehicle, the power battery can be used to supply power to the vehicle first. At the same time, during the energy consumption process, the transfer of charge will also cause the internal temperature of the battery to rise, reducing the impact of the low temperature environment.

[0067] In this embodiment, the required power of the vehicle can be the average required power of the vehicle within a preset time period. The preset time period can be set to 1 minute or 2 minutes. This embodiment does not impose any specific restrictions on this.

[0068] Step S302: When the power demand of the vehicle is less than the minimum output power of the fuel cell, control the fuel cell to start based on the first low-temperature start-up strategy.

[0069] In practice, if the current internal temperature T is less than the normal start-up temperature threshold T1, the vehicle controller collects the vehicle's required power P within 1 minute. When the vehicle's required power P is less than the fuel cell's minimum output power P1, the fuel cell is started based on the first low-temperature start-up strategy.

[0070] Furthermore, the control of starting the fuel cell based on a first low-temperature start-up strategy includes:

[0071] When the charge capacity of the power battery is less than the first charge capacity threshold, it is determined whether the fuel cell meets the preset low temperature start-up conditions.

[0072] If so, then the fuel cell is started.

[0073] It should be noted that the power battery will continuously generate heat during the operation, causing the battery temperature to rise. However, in order to prevent situations such as engine shutdown, the power battery will generally retain a certain amount of charge. In this embodiment, when the fuel cell is started by the first low-temperature start strategy, the charge capacity (State of Charge, SOC) of the power battery is not lower than the first charge capacity threshold, for example, 30%. This embodiment does not impose specific restrictions on this.

[0074] As the charge capacity of the power battery decreases, its charging capability will be improved. When the vehicle meets the conditions for fuel cell startup, the charging capability of the power battery is much greater than the minimum power point of the fuel cell. At this time, the controller controls the fuel cell to start. After the fuel cell starts, the vehicle controller judges the power conditions in real time to ensure that the power conditions are always met during the operation of the vehicle, and avoids the phenomenon of frequent start-stop of the fuel cell due to driver braking during operation.

[0075] In this embodiment and the following embodiments, determining whether the fuel cell meets the preset low-temperature start-up conditions can be done by obtaining the charging power of the power battery and the regenerative braking power of the target vehicle; when the sum of the charging power of the power battery and the required power of the vehicle is not less than the sum of the regenerative braking power and the minimum output power of the fuel cell, the fuel cell is determined to meet the preset low-temperature start-up conditions; when the sum of the charging power of the power battery and the required power of the vehicle is less than the sum of the regenerative braking power and the minimum output power of the fuel cell, the fuel cell is determined not to meet the preset low-temperature start-up conditions.

[0076] In practice, the system determines whether the sum of the vehicle's required power and the battery's allowable charging power is greater than the sum of the fuel cell's minimum power point and the regenerative braking power. Only when this condition is met will the vehicle controller control the fuel cell to start; otherwise, the fuel cell will not be allowed to start. After the fuel cell starts, the vehicle controller will determine the preset low-temperature start-up conditions in real time to ensure that the power conditions are always met during vehicle operation, thus avoiding overcharging of the battery due to driver braking during driving.

[0077] Step S303: When the required power of the vehicle is greater than or equal to the minimum output power of the fuel cell, control the fuel cell to start based on the second low-temperature start strategy, wherein the minimum charge capacity of the target vehicle's power battery under the second low-temperature start strategy is greater than the minimum charge capacity under the first low-temperature start strategy.

[0078] Understandably, if the current internal temperature T is less than the normal start-up temperature threshold T1, the vehicle controller collects the vehicle's total power demand P within 1 minute. When the vehicle's total power demand P is greater than or equal to the fuel cell's minimum output power P1, the fuel cell is started based on the second low-temperature start-up strategy.

[0079] Furthermore, the control of starting the fuel cell based on a second cryogenic start-up strategy includes:

[0080] When the charge capacity of the power battery is less than the second charge capacity threshold, it is determined whether the fuel cell meets the preset low temperature start-up conditions, wherein the second charge capacity threshold is greater than the first charge capacity threshold.

[0081] If so, then the fuel cell is started.

[0082] In this embodiment, when the fuel cell is started using the first low-temperature start-up strategy, the charge capacity of the power battery is not lower than the second charge capacity threshold, and the second charge capacity threshold is greater than the first charge capacity threshold, for example, 50%. This embodiment does not impose specific restrictions on this.

[0083] In addition, refer to Figure 4 , Figure 4 This is a schematic diagram of the overall process of the low-temperature start-up method in this embodiment. When the current internal temperature is greater than or equal to the normal start-up temperature threshold, the power battery provides the power required by the vehicle. When the charge capacity of the power battery is less than the third charge capacity threshold and the fuel cell meets the preset low-temperature start-up conditions, the fuel cell is started. The third charge capacity threshold is greater than the second charge capacity threshold. The third charge capacity threshold can be 80%, and this embodiment does not impose specific restrictions on it.

[0084] Furthermore, this embodiment of the invention also proposes a storage medium storing a fuel cell low-temperature start-up program, which, when executed by a processor, implements the steps of the fuel cell low-temperature start-up method described above.

[0085] Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0086] Reference Figure 5 , Figure 5 This is a structural block diagram of the first embodiment of the fuel cell cryogenic start-up device of the present invention.

[0087] like Figure 5 As shown, the fuel cell cryogenic start-up device proposed in this embodiment of the invention includes:

[0088] The acquisition module 10 is used to acquire the current internal temperature of the target vehicle's power battery, the minimum output power of the fuel cell, and the total power required by the vehicle.

[0089] The comparison module 20 is used to compare the required power of the vehicle with the minimum output power of the fuel cell when the current internal temperature is lower than the normal start-up temperature threshold.

[0090] The start-up module 30 is used to start the fuel cell according to the low-temperature start-up strategy corresponding to the comparison results.

[0091] In one embodiment, the starting module 30 is further configured to provide the required power for the vehicle through the power battery; when the required power for the vehicle is less than the minimum output power of the fuel cell, control the fuel cell to start based on a first low-temperature start strategy; when the required power for the vehicle is greater than or equal to the minimum output power of the fuel cell, control the fuel cell to start based on a second low-temperature start strategy, wherein the minimum charge capacity of the power battery of the target vehicle under the second low-temperature start strategy is greater than the minimum charge capacity under the first low-temperature start strategy.

[0092] In one embodiment, the start-up module 30 is further configured to determine whether the fuel cell meets the preset low-temperature start-up conditions when the charge capacity of the power battery is less than the first charge capacity threshold; if so, the fuel cell is started.

[0093] In one embodiment, the start-up module 30 is further configured to determine whether the fuel cell meets a preset low-temperature start-up condition when the charge capacity of the power battery is less than a second charge capacity threshold, wherein the second charge capacity threshold is greater than the first charge capacity threshold; if so, the fuel cell is started.

[0094] In one embodiment, the start-up module 30 is further configured to provide the required power for the vehicle through the power battery when the current internal temperature is greater than or equal to the normal start-up temperature threshold; and to start the fuel cell when the charge capacity of the power battery is less than a third charge capacity threshold and the fuel cell meets the preset low-temperature start-up conditions, wherein the third charge capacity threshold is greater than the second charge capacity threshold.

[0095] In one embodiment, the starting module 30 is further configured to acquire the charging power of the power battery and the regenerative braking power of the target vehicle; when the sum of the charging power of the power battery and the required power of the vehicle is not less than the sum of the regenerative braking power and the minimum output power of the fuel cell, the fuel cell is determined to meet the preset low-temperature start-up conditions; when the sum of the charging power of the power battery and the required power of the vehicle is less than the sum of the regenerative braking power and the minimum output power of the fuel cell, the fuel cell is determined to not meet the preset low-temperature start-up conditions.

[0096] In one embodiment, the start-up module 30 is further configured to determine the target internal temperature of the power battery based on the charging power of the power battery and the minimum power of the fuel cell, wherein the target internal temperature is the temperature at which the fuel cell starts normally; and to determine a normal start-up temperature threshold based on the target internal temperature and a preset redundancy temperature.

[0097] This embodiment determines whether the current internal temperature of the vehicle's power battery is lower than the normal start-up temperature threshold. When the current internal temperature is lower than the normal start-up temperature threshold, it indicates that the temperature of the vehicle's battery pack is low and its charging capacity is limited. At this time, the required power of the vehicle and the minimum output power of the fuel cell are compared, and then the low-temperature start-up strategy corresponding to the start-up comparison result of the fuel cell is controlled. This avoids frequent start-stops due to the influence of the power battery's charging capacity when the fuel cell starts, thus avoiding the technical problem of frequent start-stops of fuel cells in existing light trucks when starting at low temperatures.

[0098] It should be understood that although the steps in the flowcharts of this application's embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0099] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0100] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0101] In addition, for technical details not described in detail in this embodiment, please refer to the fuel cell low-temperature start-up method provided in any embodiment of the present invention, which will not be repeated here.

[0102] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0103] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0104] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0105] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A method for low-temperature start-up of a fuel cell, characterized in that, The fuel cell low-temperature start-up method includes: Obtain the current internal temperature of the target vehicle's power battery, the minimum output power of the fuel cell, and the power required by the entire vehicle; When the current internal temperature is lower than the normal start-up temperature threshold, compare the vehicle's required power with the fuel cell's minimum output power. The fuel cell is started according to the low-temperature start-up strategy corresponding to the comparison results; The step of starting the fuel cell according to the low-temperature start-up strategy corresponding to the comparison results includes: The power battery provides the power required by the entire vehicle. When the total power demand of the vehicle is less than the minimum output power of the fuel cell, the fuel cell is controlled to start based on a first low-temperature start-up strategy. When the required power of the vehicle is greater than or equal to the minimum output power of the fuel cell, the fuel cell is controlled to start based on a second low-temperature start-up strategy, and the minimum charge capacity of the target vehicle's power battery under the second low-temperature start-up strategy is greater than the minimum charge capacity under the first low-temperature start-up strategy.

2. The fuel cell cryogenic start-up method as described in claim 1, characterized in that, The control of the fuel cell to start based on a first low-temperature start-up strategy includes: When the charge capacity of the power battery is less than the first charge capacity threshold, it is determined whether the fuel cell meets the preset low temperature start-up conditions. If so, then the fuel cell is started.

3. The fuel cell cryogenic start-up method as described in claim 1, characterized in that, The control of starting the fuel cell based on a second cryogenic start-up strategy includes: When the charge capacity of the power battery is less than the second charge capacity threshold, it is determined whether the fuel cell meets the preset low temperature start-up conditions, wherein the second charge capacity threshold is greater than the first charge capacity threshold. If so, then the fuel cell is started.

4. The fuel cell cryogenic start-up method as described in claim 3, characterized in that, The fuel cell low-temperature start-up method further includes: When the current internal temperature is greater than or equal to the normal start-up temperature threshold, the power battery provides the power required by the vehicle. When the charge capacity of the power battery is less than the third charge capacity threshold and the fuel cell meets the preset low temperature start-up conditions, the fuel cell is started, wherein the third charge capacity threshold is greater than the second charge capacity threshold.

5. The fuel cell cryogenic start-up method according to any one of claims 2-4, characterized in that, The determination of the preset low-temperature start-up conditions includes: The charging power of the power battery and the regenerative braking power of the target vehicle are obtained. When the sum of the charging power of the power battery and the required power of the vehicle is not less than the sum of the regenerative braking power and the minimum output power of the fuel cell, the fuel cell is determined to meet the preset low-temperature start-up conditions. When the sum of the charging power of the power battery and the required power of the vehicle is less than the sum of the regenerative braking power and the minimum output power of the fuel cell, it is determined that the fuel cell does not meet the preset low-temperature start-up conditions.

6. The fuel cell cryogenic start-up method as described in claim 1, characterized in that, The fuel cell low-temperature start-up method further includes: The target internal temperature of the power battery is determined based on the charging power of the power battery and the minimum power of the fuel cell. The target internal temperature is the temperature at which the fuel cell starts normally. The normal startup temperature threshold is determined based on the target internal temperature and the preset redundancy temperature.

7. A fuel cell cryogenic start-up device, characterized in that, The fuel cell cryogenic start-up device includes: The acquisition module is used to acquire the current internal temperature of the target vehicle's power battery, the minimum output power of the fuel cell, and the power required by the entire vehicle. The comparison module is used to compare the required power of the vehicle with the minimum output power of the fuel cell when the current internal temperature is lower than the normal start-up temperature threshold. A startup module is used to start the fuel cell according to the low-temperature startup strategy corresponding to the comparison results. The starting module is further configured to provide the required power for the vehicle through the power battery; when the required power for the vehicle is less than the minimum output power of the fuel cell, control the fuel cell to start based on a first low-temperature start strategy; when the required power for the vehicle is greater than or equal to the minimum output power of the fuel cell, control the fuel cell to start based on a second low-temperature start strategy, wherein the minimum charge capacity of the power battery of the target vehicle under the second low-temperature start strategy is greater than the minimum charge capacity under the first low-temperature start strategy.

8. A fuel cell cryogenic start-up device, characterized in that, The fuel cell cryogenic start-up device includes: a memory, a processor, and a fuel cell cryogenic start-up program stored in the memory and executable on the processor, the fuel cell cryogenic start-up program being configured to implement the fuel cell cryogenic start-up method as described in any one of claims 1 to 6.

9. A storage medium, characterized in that, The storage medium stores a fuel cell cryogenic start-up program, which, when executed by a processor, implements the fuel cell cryogenic start-up method as described in any one of claims 1 to 6.

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