Hydrogen hybrid vehicle power output method, device, medium, and vehicle

Abstract

The application provides a power output method and device of a hydrogen hybrid vehicle, a medium and a vehicle, and belongs to the technical field of hydrogen hybrid vehicles. In the embodiment of the application, a target power interval corresponding to a current SOC value of a power battery and a target power interval corresponding to a current vehicle demand power are obtained, and an output power of a hydrogen fuel cell is obtained according to a target output power corresponding to a combination of the target power interval and the target power interval, and the hydrogen fuel cell is controlled to output power according to the target output power. In the embodiment of the application, based on the battery characteristics of the power battery under different working conditions and the vehicle demand power range of the vehicle under different vehicle working conditions, the output power of the hydrogen fuel cell is adjusted to a suitable position, so that the hydrogen fuel cell can adapt to the dynamic power demand under various working conditions, and the demand of the vehicle for the output capacity and the power of the power battery is reduced, the vehicle power demand is met, and the vehicle cost and operation and maintenance cost are reduced.

Description

Technical Field

[0001] This application relates to the field of hydrogen hybrid electric vehicle technology, and in particular to a power output method, apparatus, medium, and vehicle for a hydrogen hybrid electric vehicle. Background Technology

[0002] With strong government support, new energy vehicles are receiving increasing attention from major automakers. Among them, hydrogen fuel cell vehicles have a very promising future. The economics of hydrogen fuel cell vehicles are closely related to their energy management strategies. Currently, the mainstream energy management strategy for hydrogen fuel cell vehicles on the market is the power-following strategy. The idea behind the power-following strategy is that the power required by the vehicle is mainly provided by the hydrogen fuel cell. However, because the power response speed of the hydrogen fuel cell is relatively slow and cannot adapt to the variable power demand of the vehicle, the missing power will be supplemented by the power battery to meet the dynamic power requirements of the vehicle.

[0003] Current power follower strategies often set a fixed fuel cell output power based on the SOC window of different power batteries, that is, matching the corresponding fuel cell output power according to the SOC range to which the current SOC of the power battery belongs.

[0004] However, since the current SOC value of the power battery remains unchanged within its SOC window, the corresponding output power of the hydrogen fuel cell also remains unchanged. Since the battery output power setting is usually based on empirical values, it has poor adaptability to certain vehicle operating conditions. This results in the frequent use of only a few fuel cell output points, making it difficult to adapt to the dynamic power demands of the entire vehicle. Furthermore, when the hydrogen fuel cell cannot effectively meet the vehicle's power requirements, the power battery needs to frequently supplement the power lacking in the hydrogen fuel cell, causing more frequent fluctuations in the power battery's SOC. This, in turn, affects the power battery's lifespan and increases subsequent maintenance costs. Summary of the Invention

[0005] This application provides a power output method, apparatus, medium, and vehicle for a hydrogen hybrid electric vehicle, which can control the output power of the hydrogen fuel cell to be appropriate according to the actual operating conditions of the vehicle, so that the hydrogen fuel cell can adapt to the dynamic power demand of the whole vehicle and reduce the demand of the whole vehicle on the output capacity and power of the power battery, thereby reducing the vehicle cost and maintenance cost while meeting the power demand of the vehicle.

[0006] To solve the above problems, this application adopts the following technical solution:

[0007] In a first aspect, embodiments of this application provide a power output method for a hydrogen hybrid electric vehicle, the hydrogen hybrid electric vehicle including a hydrogen fuel cell and a power battery, the method comprising:

[0008] Obtain the current SOC value of the power battery and the current power requirement of the vehicle;

[0009] Obtain the target energy range corresponding to the current SOC value and the target power range corresponding to the current vehicle power demand; wherein, different energy ranges are used to characterize different operating conditions of the power battery, and different power ranges are used to characterize the range of vehicle power demand under different vehicle operating conditions;

[0010] Obtain the target output power corresponding to the combination of the target energy range and the target power range, wherein the target output power is the output power of the hydrogen fuel cell;

[0011] The hydrogen fuel cell is controlled to output power according to the target output power.

[0012] In one embodiment of this application, obtaining the target output power corresponding to the combination of the target energy range and the target power range includes:

[0013] Based on the weight values ​​corresponding to the target power range and the target energy range, the corresponding target weight values ​​are obtained; wherein, different power ranges and different power ranges each correspond to different weight values.

[0014] Based on the preset mapping relationship between the weight value and the preset output power, the target output power corresponding to the target weight value is determined.

[0015] In one embodiment of this application, obtaining a corresponding target weight value based on the weight values ​​corresponding to the target power range and the target energy range includes:

[0016] Based on the battery characteristics of the power battery, the optimal operating range of the power battery is determined within the power range.

[0017] The optimal weight value range for the hydrogen fuel cell is determined by summing the weight values ​​corresponding to the optimal operating range and the weight values ​​corresponding to all power ranges.

[0018] Based on the preset mapping relationship between weight values ​​and preset output power, the target output power corresponding to the target weight value is determined, including:

[0019] If the target weight value is less than the lower limit of the optimal weight value range, the target output power of the hydrogen fuel cell is determined to be the preset minimum power value.

[0020] When the target weight value is within the optimal weight value range, the target output power corresponding to the target weight value is determined based on the preset mapping relationship between the weight value and the preset output power.

[0021] If the target weight value is greater than the upper limit weight value within the optimal weight value range, the target output power of the hydrogen fuel cell is determined to be the maximum usable power of the hydrogen fuel cell.

[0022] In one embodiment of this application, the power range includes a low-power range under vehicle idling conditions, a common power range under normal speed conditions, a transitional power range under acceleration or deceleration conditions, and a high-power range under conditions where the vehicle's required power reaches the peak power of the power battery; the preset output power includes a first preset output power, a second preset output power, a third preset output power, and a fourth preset output power, wherein,

[0023] The first preset output power is obtained based on the accessory power of the vehicle in the low power range;

[0024] The second preset output power is obtained based on the upper limit power value and lower limit power value of the common power range when the vehicle is in the common power range, as well as the total discharge energy and total regenerative braking energy of the vehicle under normal speed conditions;

[0025] The third preset output power is obtained based on the upper limit power value and the lower limit power value of the transition power range when the vehicle is in the transition power range;

[0026] The fourth preset output power is obtained based on the peak power of the power battery when the vehicle is in the high power range, the maximum available power of the hydrogen fuel cell, the power load rate of the hydrogen fuel cell, and the preset power load time.

[0027] In one embodiment of this application, the commonly used power range includes a preset number of commonly used power sub-ranges; the preset output power corresponding to each commonly used power sub-range is obtained based on the upper limit power value and lower limit power value of the commonly used power sub-range, as well as the total discharge energy and total regenerative braking energy of the vehicle under normal speed conditions;

[0028] The transition power range includes an acceleration transition power sub-range and a deceleration transition power sub-range; the preset output power corresponding to the acceleration transition power sub-range is obtained based on the upper limit power value and the lower limit power value of the acceleration transition power sub-range, and the preset output power corresponding to the deceleration transition power sub-range is obtained based on the upper limit power value and the lower limit power value of the deceleration transition power sub-range.

[0029] In one embodiment of this application, obtaining the current power demand of the entire vehicle includes:

[0030] Obtain the voltage and current data of the drive motor;

[0031] The product of the voltage data and the current data is taken as the current vehicle power requirement.

[0032] Secondly, based on the same inventive concept, embodiments of this application provide a power output device for a hydrogen hybrid electric vehicle. The device is used in a hydrogen hybrid electric vehicle, which includes a hydrogen fuel cell and a power battery. The device includes:

[0033] The first acquisition module is used to acquire the current SOC value of the power battery and the current power requirement of the vehicle.

[0034] The second acquisition module is used to acquire the target power range corresponding to the current SOC value and the target power range corresponding to the current vehicle power demand; wherein, different power ranges are used to characterize different operating conditions of the power battery, and different power ranges are used to characterize the range of vehicle power demand under different vehicle operating conditions.

[0035] The third acquisition module is used to acquire the target output power corresponding to the combination of the target energy range and the target power range, wherein the target output power is the output power of the hydrogen fuel cell.

[0036] The power control module is used to control the hydrogen fuel cell to output power according to the target output power.

[0037] In one embodiment of this application, the second acquisition module includes:

[0038] The target weight value acquisition submodule is used to acquire the corresponding target weight value based on the weight values ​​corresponding to the target power range and the target energy range respectively; wherein, different power ranges and different power ranges correspond to different weight values.

[0039] The target output power determination submodule is used to determine the target output power corresponding to the target weight value based on the mapping relationship between the preset weight value and the preset output power.

[0040] In one embodiment of this application, the target weight value acquisition submodule includes:

[0041] The optimal operating range determination unit is used to determine the optimal operating range of the power battery within the specified capacity range based on the battery characteristics of the power battery.

[0042] The optimal weight value range determination unit is used to determine the optimal weight value range for the hydrogen fuel cell based on the sum of the weight values ​​corresponding to the optimal operating range and the weight values ​​corresponding to all power ranges.

[0043] The target output power determination submodule includes:

[0044] The first power determination unit is used to determine the target output power of the hydrogen fuel cell as a preset minimum power value when the target weight value is less than the lower limit weight value of the optimal weight value range.

[0045] The second power determination unit is used to determine the target output power corresponding to the target weight value based on a preset mapping relationship between the target weight value and the preset output power, when the target weight value is within the optimal weight value range.

[0046] The third power determination unit is used to determine the target output power of the hydrogen fuel cell as the maximum usable power of the hydrogen fuel cell when the target weight value is greater than the upper limit weight value within the optimal weight value range.

[0047] In one embodiment of this application, the power range includes a low-power range under vehicle idling conditions, a common power range under normal speed conditions, a transitional power range under acceleration or deceleration conditions, and a high-power range under conditions where the vehicle's required power reaches the peak power of the power battery; the preset output power includes a first preset output power, a second preset output power, a third preset output power, and a fourth preset output power, wherein,

[0048] The first preset output power is obtained based on the accessory power of the vehicle in the low power range;

[0049] The second preset output power is obtained based on the upper limit power value and lower limit power value of the common power range when the vehicle is in the common power range, as well as the total discharge energy and total regenerative braking energy of the vehicle under normal speed conditions;

[0050] The third preset output power is obtained based on the upper limit power value and the lower limit power value of the transition power range when the vehicle is in the transition power range;

[0051] The fourth preset output power is obtained based on the peak power of the power battery when the vehicle is in the high power range, the maximum available power of the hydrogen fuel cell, the power load rate of the hydrogen fuel cell, and the preset power load time.

[0052] In one embodiment of this application, the commonly used power range includes a preset number of commonly used power sub-ranges; the preset output power corresponding to each commonly used power sub-range is obtained based on the upper limit power value and lower limit power value of the commonly used power sub-range, as well as the total discharge energy and total regenerative braking energy of the vehicle under normal speed conditions;

[0053] The transition power range includes an acceleration transition power sub-range and a deceleration transition power sub-range; the preset output power corresponding to the acceleration transition power sub-range is obtained based on the upper limit power value and the lower limit power value of the acceleration transition power sub-range, and the preset output power corresponding to the deceleration transition power sub-range is obtained based on the upper limit power value and the lower limit power value of the deceleration transition power sub-range.

[0054] In one embodiment of this application, the first acquisition module includes:

[0055] The data acquisition submodule is used to acquire the voltage and current data of the drive motor;

[0056] The calculation submodule takes the product of the voltage data and the current data as the current vehicle power requirement.

[0057] Thirdly, based on the same inventive concept, embodiments of this application provide a storage medium storing machine-executable instructions, which, when executed by a processor, implement the power output method for a hydrogen hybrid electric vehicle proposed in the first aspect of this application.

[0058] Fourthly, based on the same inventive concept, embodiments of this application provide a vehicle including a processor and a memory. The memory stores machine-executable instructions that can be executed by the processor, and the processor executes the machine-executable instructions to implement the power output method of the hydrogen hybrid electric vehicle proposed in the first aspect of this application.

[0059] Compared with the prior art, this application has the following advantages:

[0060] This application provides a power output method for a hydrogen hybrid electric vehicle. It obtains the target charge range corresponding to the current SOC value of the power battery and the target power range corresponding to the current vehicle power demand. Based on the target output power corresponding to the combination of the target charge range and the target power range, the output power of the hydrogen fuel cell is obtained, and the hydrogen fuel cell is controlled to output power according to the target output power. This application, based on the battery characteristics of the power battery under different operating conditions and the vehicle's power demand range under different vehicle operating conditions, adjusts the output power of the hydrogen fuel cell to a suitable position. This allows the hydrogen fuel cell to adapt to dynamic power demands under various operating conditions and reduces the vehicle's demand on the power battery's output capacity and charge, thereby reducing vehicle costs and maintenance costs while meeting the vehicle's power requirements. Attached Figure Description

[0061] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0062] Figure 1 This is a flowchart of the steps of a power output method for a hydrogen hybrid electric vehicle according to an embodiment of this application;

[0063] Figure 2 This is a functional module schematic diagram of a power output device for a hydrogen hybrid electric vehicle according to one embodiment of this application.

[0064] Reference numerals: 200 - Power output device of hydrogen hybrid electric vehicle; 201 - First acquisition module; 202 - Second acquisition module; 203 - Third acquisition module; 204 - Power control module. Detailed Implementation

[0065] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0066] Referring to Table 1, the relationship between the SOC window of the power battery and the output power of the hydrogen fuel cell in existing power follower strategies is shown, where P2 represents the maximum available power of the hydrogen fuel cell. It should be noted that both the SOC window of the power battery and the output power of the hydrogen fuel cell are typically selected based on empirical values. Furthermore, the selection of the power output point of the hydrogen fuel cell considers relatively few factors: a higher current SOC of the power battery results in a lower fuel cell output power, and a lower current SOC results in a higher fuel cell output power.

[0067] Table 1. Relationship between the SOC window of the power battery and the output power of the hydrogen fuel cell.

[0068]

[0069]

[0070] It should be noted that, according to the principle of power follow-up strategy, the power demand of the vehicle is primarily provided by the hydrogen fuel cell, with the power supplied by the battery for any shortfall in instantaneous response. For example, suppose the available power of the hydrogen fuel cell is P2, and the maximum power demand of the vehicle is P3. When the vehicle's power demand increases to the full value of P3, the hydrogen fuel cell needs to ramp up its power to P2 within a short period. During this time, the power demand shortfall will be made up by the battery. The slower the fuel cell power ramp-up, the higher the output capacity requirement of the battery, and the greater the demand on the battery's charge capacity.

[0071] For power batteries, during normal driving, their SOC window is typically 65%-85%, meaning the power output point of a hydrogen fuel cell is usually 0.4*P2. However, when driving in complex and changing road conditions, the vehicle's operating conditions will also change. For example, when the vehicle needs to accelerate at full throttle urgently or climb a hill, the power rate of the hydrogen fuel cell often cannot increase or the rate of increase is insufficient, resulting in insufficient power. This causes the power battery to frequently replenish the power that the hydrogen fuel cell lacks, leading to frequent changes in the power battery's SOC, reducing the power battery's lifespan, and making it difficult to ensure that the power battery has sufficient reserve power.

[0072] Therefore, in the traditional power follower strategy, simply relying on the SOC window of the power battery cannot accurately reflect the vehicle's requirements for the output power of the hydrogen fuel cell.

[0073] To address the problems existing in the aforementioned background technology, this application aims to provide a power output method for hydrogen hybrid electric vehicles. Based on the current SOC value of the power battery, it comprehensively considers the current power demand of the entire vehicle and various driving conditions, mapping the vehicle's demand for hydrogen fuel cell output power from multiple dimensions. This allows the method to automatically identify a reasonable power output point for the hydrogen fuel cell based on the actual operating conditions of the vehicle and even different driving styles, thereby enabling the fuel cell to operate at a suitable position and adapt to the vehicle's changing dynamic power demands.

[0074] Reference Figure 1 This application illustrates a power output method for a hydrogen hybrid electric vehicle. The method is applied to a hydrogen hybrid electric vehicle, which includes a hydrogen fuel cell and a power battery. The method may include the following steps:

[0075] S101: Obtain the current SOC value of the power battery and the current power requirement of the vehicle.

[0076] It should be noted in this embodiment that hydrogen hybrid electric vehicles are typically powered by both hydrogen fuel cells and power batteries, and the power required by the vehicle is primarily provided by the hydrogen fuel cells, while the power supplied for any short-term power shortage is provided by the power batteries.

[0077] It is important to further explain that a hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Its basic principle is the reverse reaction of water electrolysis. Hydrogen and oxygen are supplied to the anode and cathode, respectively. Hydrogen diffuses outward through the anode and reacts with the electrolyte, releasing electrons that travel through an external load to the cathode. Therefore, a hydrogen fuel cell differs from a power battery in that it does not have the traditional concept of SOC (State of Charge). SOC reflects the remaining capacity of the battery and is numerically defined as the ratio of remaining capacity to the battery's total capacity, usually expressed as a percentage. Its value ranges from 0 to 1; when SOC = 0, the battery is fully discharged, and when SOC = 1, the battery is fully charged.

[0078] In this embodiment, considering the selection of hydrogen fuel cell output power, in addition to the current SOC value of the power battery, it should also be related to the current power demand of the entire vehicle. Based on the current power demand of the entire vehicle, the current operating condition of the vehicle can be determined. The higher the current power demand of the entire vehicle, the greater the power output required by the vehicle, and therefore the greater the output power of the hydrogen fuel cell should be. In this way, the actual demand of the vehicle on the fuel cell output power can be more comprehensively reflected.

[0079] S102: Obtain the target energy range corresponding to the current SOC value and the target power range corresponding to the current vehicle power demand; where different energy ranges are used to characterize different operating conditions of the power battery, and different power ranges are used to characterize the range of vehicle power demand under different vehicle operating conditions.

[0080] In this embodiment, the SOC of the power battery is divided into several charge ranges; the vehicle is divided according to its power output into several power ranges. In other words, once the current SOC value of the power battery and the current power requirement of the vehicle are obtained, the target charge range to which the current SOC value belongs, and the target power range to which the current power requirement of the vehicle belongs, can be determined.

[0081] It should be noted that different charge ranges correspond to different operating conditions of the power battery. For example, when the target charge range of the power battery is small, it means that the state of charge (SOC) of the power battery is low, requiring the hydrogen fuel cell to output a large power. On the other hand, different power ranges are used to characterize the range of power demand of the whole vehicle under different vehicle operating conditions. For example, when the power range to which the current power demand of the whole vehicle belongs is large, it means that the power required to drive the vehicle is large, and the hydrogen fuel cell is also required to output a large power.

[0082] S103: Obtain the target output power corresponding to the combination of the target energy range and the target power range. The target output power is the output power of the hydrogen fuel cell.

[0083] In this embodiment, different operating conditions of the power battery and the vehicle are comprehensively considered, so that the target output power obtained based on the target charge range and the target power range is more in line with the power requirements of the vehicle under the current operating conditions. That is to say, different target power ranges under different target charge ranges correspond to different target output powers. The smaller the current SOC value corresponding to the target charge range, the greater the current power requirement of the vehicle corresponding to the target power range, and the greater the target output power.

[0084] S104: Controls the hydrogen fuel cell to output power according to the target output power.

[0085] In this embodiment, after determining the target output power, the hydrogen fuel cell can be directly controlled to output power according to the target output power, quickly responding to the vehicle's power demand and avoiding insufficient power due to the hydrogen fuel cell's power rate not being able to climb or the climbing rate being insufficient, which would affect the user's experience.

[0086] In this embodiment, based on the battery characteristics of the power battery under different operating conditions and the vehicle's power demand range under different vehicle operating conditions, the output power of the hydrogen fuel cell is adjusted to a suitable position, so that the hydrogen fuel cell can adapt to the dynamic power demand under various operating conditions and reduce the vehicle's demand on the power battery's output capacity and power, thereby reducing the vehicle's cost and maintenance cost while meeting the vehicle's power demand.

[0087] In one feasible implementation, S103 may specifically include the following sub-steps:

[0088] S103-1: Obtain the corresponding target weight value based on the weight values ​​corresponding to the target power range and the target energy range respectively; wherein, different power ranges and different energy ranges correspond to different weight values.

[0089] In this embodiment, referring to Table 2, the operating conditions of the power battery corresponding to different charge ranges are shown.

[0090] Table 2 Comparison of Battery Capacity Range and Power Battery Operating Conditions

[0091]

[0092]

[0093] In this embodiment, based on the battery characteristics of the power battery, six energy ranges under different operating conditions can be obtained. For hydrogen fuel cells, the lower the current SOC value of the power battery, the greater the power output required by the hydrogen fuel cell. Therefore, a larger energy weight value is assigned to the smaller energy range. Referring to Table 3, the energy weight values ​​for different energy ranges are shown.

[0094] Table 3. Comparison of Power Range and Power Weight Value

[0095] Battery range Battery Weight Value 0-30％ 5 30％-40％ 4 40％-70％ 3 70％-85％ 2 85％-95％ 1 95％-100％ 0

[0096] In this embodiment, the power weight value is set according to the principle that the smaller the SOC value corresponding to the power range, the larger the power weight value corresponding to the power range. This results in six different power weight values, namely 0-5, as shown in Table 3.

[0097] In this embodiment, since different power ranges correspond to different power weight values, after obtaining the target power range corresponding to the current SOC value, the power weight value corresponding to the target power range can be obtained.

[0098] In this embodiment, referring to Table 4, the power weight values ​​under different power ranges are shown for the overall vehicle power requirements.

[0099] Table 4. Comparison of Power Range and Power Weight Value

[0100]

[0101]

[0102] It should be noted that 0 to P1 represents the low power range under idling conditions; P1 to P1.1, P1.1 to P1.2, and P1.2 to P2 all represent the commonly used power range under normal speed conditions. Because this commonly used power range is relatively large, it is divided into three equal sub-ranges; P2 to P2.1 and P2.1 to P3 represent the transitional power ranges from low to high and from high to low vehicle power, usually corresponding to vehicle acceleration or deceleration conditions; P3 to P4+P5 represents the high power range under conditions where the vehicle's required power reaches the peak power of the power battery, where P3 represents the peak power of the power battery, P4 represents the rated power of the power battery, and P5 represents the maximum available power of the hydrogen fuel cell. The high power range usually corresponds to the vehicle's full acceleration condition; >P4+P5 represents the overload power range, which exceeds the maximum rated power that the vehicle's power battery and hydrogen fuel cell can provide together. Under this condition, the maximum available power P5 of the hydrogen fuel cell will be directly used as the target output power of the hydrogen fuel cell.

[0103] In this embodiment, the power weight value corresponding to the power range is set according to the principle that the larger the current vehicle power demand is, the larger the power weight value is, thus obtaining eight different power weight values ​​of 1-8 as shown in Table 4.

[0104] In this embodiment, since different power ranges correspond to different power weight values, after obtaining the target power range corresponding to the current vehicle power requirement, the power weight value corresponding to the target power range can be obtained.

[0105] In this embodiment, after obtaining the corresponding power weight value and power weight value, the sum of the power weight value and power weight value can be used as the target weight value.

[0106] S103-2: Determine the target output power corresponding to the target weight value based on the preset mapping relationship between the preset weight value and the preset output power.

[0107] In this embodiment, referring to Table 5, the mapping relationship between the weight value and the preset output power is shown.

[0108] Table 5. Comparison of Weight Values ​​and Preset Output Power

[0109] weight value Preset output power 1 0 2 P0 3 P0 4 Paux 5 Pa 6 Pb 7 Pc 8 Pd 9 Pe 10 Pf 11 P5 12 P5 13 P5

[0110] It should be noted that the weight values ​​in Table 5 are obtained by adding the energy weight values ​​in Table 3 and the power weight values ​​in Table 4 in pairs. In other words, the energy weight values ​​0-5 and the power weight values ​​1-8 are added in pairs to obtain the weight values ​​1-13, which are the 13 different weight values ​​shown in Table 5.

[0111] It should be further explained that the preset output power values, from 0 to P5, are successively increasing output power values. Here, P0 represents the idle power; Paux represents the accessory power, that is, the minimum power to maintain the normal operation of the vehicle's related equipment; Pa, Pb, Pc, Pd, Pe, and Pf represent successively increasing preset power values; and P5 represents the maximum usable power of the hydrogen fuel cell.

[0112] In this embodiment, in order to improve the life of the power battery, it is necessary to maintain the SOC value of the power battery within a suitable charge range during vehicle operation. Therefore, the optimal operating range of the power battery can be determined among multiple charge ranges based on the battery characteristics of the power battery.

[0113] In this embodiment, referring to Table 2, 40%-70% is the optimal operating range of the power battery. The power weight value corresponding to this optimal operating range is 3. The sum of the power weight value (3) and the weight values ​​(1-8) corresponding to all power ranges can be used to determine the optimal weight value range for the hydrogen fuel cell, namely the weight value range of 4-11.

[0114] Based on the relationship between the target weight value and the optimal weight value range, S103-2 may specifically include the following sub-steps:

[0115] S103-2-1: When the target weight value is less than the lower limit weight value of the optimal weight value range, the target output power of the hydrogen fuel cell is determined to be the preset minimum power value.

[0116] In this embodiment, when the target weight value is less than the lower limit of the optimal weight value range, i.e., less than 4, the target output power of the hydrogen fuel cell is determined to be the preset minimum power value, i.e., the idle power P0 or 0.

[0117] S103-2-2: When the target weight value is within the optimal weight value range, the target output power corresponding to the target weight value is determined based on the preset mapping relationship between the weight value and the preset output power.

[0118] In this embodiment, when the target weight value is within the optimal weight value range, i.e., 4-11, the target output power corresponding to the target weight value is determined based on the preset mapping relationship between the weight value and the preset output power. The preset output power is Pa, Pb, Pc, Pd, Pe, Pf, P5.

[0119] S103-2-3: When the target weight value is greater than the upper limit weight value within the optimal weight value range, the target output power of the hydrogen fuel cell is determined to be the maximum usable power of the hydrogen fuel cell.

[0120] In this embodiment, when the target weight value is greater than the upper limit weight value within the optimal weight value range, i.e., 11, the target output power of the hydrogen fuel cell is determined to be the maximum usable power of the hydrogen fuel cell, i.e., P5.

[0121] In this embodiment, weighted positioning is performed based on the energy weight value corresponding to the optimal operating range of the power battery. After adjusting the target output power of the hydrogen fuel, the current SOC value of the power battery can be stabilized within the optimal operating range, i.e., 40%-70%. This can maintain the power battery SOC at a good level to the greatest extent, avoiding frequent fluctuations in the power battery SOC, which would affect the life of the power battery and increase subsequent maintenance costs.

[0122] To enable hydrogen fuel cells to better adapt to the dynamic power requirements of the vehicle, the preset output power values ​​Paux, Pa, Pb, Pc, Pd, Pe, Pf, and P5 are all calculated based on different power ranges. For details, please refer to Table 6, which shows the comparison between the power ranges and the preset output power.

[0123] Table 6. Comparison of Power Range and Preset Output Power

[0124] Power range Preset output power 0～P1 Paux P1~P1.1 Pa P1.1~P1.2 Pb P1.2~P2 Pc P2~P2.1 Pd P2.1~P3 Pe P3~P4+P5 Pf >P4+P5 P5

[0125] Wherein, 0 to P1 represents the low power range under idling conditions, and the accessory power Paux corresponding to this low power range is the first preset output power; the accessory power Paux is calculated based on the average accessory power value under this idling condition.

[0126] P1-P2 represents the commonly used power range under normal speed conditions. P1~P1.1, P1.1~P1.2, and P1.2~P2 are three equally divided sub-ranges of commonly used power within the commonly used power range. These three sub-ranges correspond to three second preset output powers Pa, Pb, and Pc, respectively. Pa, Pb, and Pc are obtained based on the upper and lower power limits of their respective commonly used power sub-ranges, as well as the vehicle's total discharge energy and total regenerative braking energy under normal speed conditions. See the following formula for details:

[0127] P = P' * M / (M + N) (1);

[0128] Wherein, P represents the second preset output power, P' represents the average of the sum of the upper limit power value and the lower limit power value of the common power sub-range corresponding to the second preset output power; M represents the preset total discharge energy of the vehicle under the common power sub-range; and N represents the preset total regenerative braking energy of the vehicle under the common power sub-range.

[0129] P2-P3 represents the transition power range under acceleration or deceleration conditions. Specifically, P2 to P2.1 represents the acceleration transition power sub-range under acceleration conditions, and P2.1 to P3 represents the deceleration transition power sub-range under deceleration conditions. P2 to P2.1 and P2.1 to P3 correspond to two third preset output powers, Pd and Pe, respectively. Pd is the average of the sum of the upper and lower power limits of the acceleration transition power sub-range, and Pe is the average of the sum of the upper and lower power limits of the deceleration transition power sub-range.

[0130] P3~P4+P5 represents the high-power range under the condition that the vehicle's power demand reaches the peak power P3 of the power battery, corresponding to the fourth preset output power Pf. Pf is based on the peak power of the power battery, the maximum available power of the hydrogen fuel cell, the power load rate of the hydrogen fuel cell, and the preset power load time when the vehicle is in the high-power range. For details, please refer to the following formula:

[0131] Pf = P4 + P5 - x*t (2);

[0132] Wherein, Pf represents the fourth preset output power in kW; P4 represents the rated power of the power battery in kW; P5 represents the maximum available power of the hydrogen fuel cell; x represents the power loading rate of the hydrogen fuel cell in kW / s; and t represents the loading time in seconds.

[0133] >P4+P5 indicates the overload power range, which exceeds the maximum rated power that the vehicle's power battery and hydrogen fuel cell can provide together. Under this condition, the maximum available power P5 of the hydrogen fuel cell will be used as the target output power of the hydrogen fuel cell to maintain vehicle operation.

[0134] In this embodiment, the preset output power of the hydrogen fuel cell is calculated based on the vehicle's power demand under various operating conditions. Therefore, it can effectively adapt to various vehicle operating conditions and driving styles, enabling the hydrogen fuel cell to fully meet the power output requirements under various operating conditions, reduce the vehicle's demand on the power battery's output capacity and power, avoid frequent fluctuations in the power battery's SOC, extend the power battery's lifespan, and reduce vehicle costs and maintenance costs while meeting the vehicle's power requirements.

[0135] In one feasible implementation, S101 may specifically include the following steps:

[0136] S101-1: Obtain the voltage and current data of the drive motor.

[0137] S101-2: The product of voltage and current data is used as the current power requirement of the vehicle.

[0138] In this embodiment, the current power requirement of the vehicle can be calculated according to the following formula:

[0139] P'=U*I (2);

[0140] In the formula: P' represents the current power demand of the vehicle; U represents the voltage of the drive motor; and I represents the current of the drive motor.

[0141] It should be noted that, since the hydrogen fuel cell and the power battery share a single drive motor in a hydrogen hybrid electric vehicle, the current power demand of the vehicle can be accurately calculated by collecting the voltage and current data of the drive motor. This provides a basis for determining the power weighting coefficient corresponding to the current power demand of the vehicle.

[0142] Secondly, referring to Figure 2 Based on the same inventive concept, this application provides a power output device 200 for a hydrogen hybrid electric vehicle. This power output device 200 is used in a hydrogen hybrid electric vehicle, which includes a hydrogen fuel cell and a power battery. The power output device 200 includes:

[0143] The first acquisition module 201 is used to acquire the current SOC value of the power battery and the current power demand of the vehicle.

[0144] The second acquisition module 202 is used to acquire the target energy range corresponding to the current SOC value and the target power range corresponding to the current vehicle power demand; wherein, different energy ranges are used to characterize different operating conditions of the power battery, and different power ranges are used to characterize the range of vehicle power demand under different vehicle operating conditions.

[0145] The third acquisition module 203 is used to acquire the target output power corresponding to the combination of the target energy range and the target power range, where the target output power is the output power of the hydrogen fuel cell.

[0146] The power control module 204 is used to control the hydrogen fuel cell to output power according to the target output power.

[0147] In one feasible implementation, the second acquisition module 202 includes:

[0148] The target weight value acquisition submodule is used to obtain the corresponding target weight value based on the weight values ​​corresponding to the target power range and the target energy range respectively; wherein, different power ranges and different power ranges correspond to different weight values.

[0149] The target output power determination submodule is used to determine the target output power corresponding to the target weight value based on the mapping relationship between the preset weight value and the preset output power.

[0150] In one feasible implementation, the target weight value acquisition submodule includes:

[0151] The optimal operating range determination unit is used to determine the optimal operating range of the power battery within the specified capacity range, based on the battery characteristics of the power battery.

[0152] The optimal weight value range determination unit is used to determine the optimal weight value range for hydrogen fuel cells based on the sum of the weight values ​​corresponding to the optimal operating range and the weight values ​​corresponding to all power ranges.

[0153] The target output power determination submodule includes:

[0154] The first power determination unit is used to determine the target output power of the hydrogen fuel cell as the preset minimum power value when the target weight value is less than the lower limit weight value of the optimal weight value range.

[0155] The second power determination unit is used to determine the target output power corresponding to the target weight value based on the preset mapping relationship between the preset weight value and the preset output power, when the target weight value is within the optimal weight value range.

[0156] The third power determination unit is used to determine the target output power of the hydrogen fuel cell as the maximum usable power of the hydrogen fuel cell when the target weight value is greater than the upper limit weight value within the optimal weight value range.

[0157] In one feasible implementation, the power range includes a low-power range under vehicle idling conditions, a common power range under normal speed conditions, a transitional power range under acceleration or deceleration conditions, and a high-power range under conditions where the vehicle's required power reaches the peak power of the power battery; the preset output power includes a first preset output power, a second preset output power, a third preset output power, and a fourth preset output power, wherein...

[0158] The first preset output power is obtained based on the accessory power of the vehicle in the low power range;

[0159] The second preset output power is obtained based on the upper limit power value and lower limit power value of the common power range when the vehicle is in the common power range, as well as the total discharge energy and total regenerative braking energy of the vehicle under normal speed conditions.

[0160] The third preset output power is obtained based on the upper and lower power values ​​of the transition power range when the vehicle is in the transition power range.

[0161] The fourth preset output power is based on the peak power of the power battery when the vehicle is in the high power range, the maximum available power of the hydrogen fuel cell, the power load rate of the hydrogen fuel cell, and the preset power load time.

[0162] In one feasible implementation, the common power range includes a preset number of common power sub-ranges; the preset output power corresponding to each common power sub-range is obtained based on the upper limit power value, the lower limit power value of the common power sub-range, and the total discharge energy and total regenerative braking energy of the vehicle under normal speed conditions;

[0163] The transition power range includes an acceleration transition power sub-range and a deceleration transition power sub-range. The preset output power corresponding to the acceleration transition power sub-range is obtained based on the upper limit power value and the lower limit power value of the acceleration transition power sub-range, and the preset output power corresponding to the deceleration transition power sub-range is obtained based on the upper limit power value and the lower limit power value of the deceleration transition power sub-range.

[0164] In one feasible implementation, the first acquisition module 201 includes:

[0165] The data acquisition submodule is used to acquire the voltage and current data of the drive motor;

[0166] The calculation submodule takes the product of the voltage data and the current data as the current power requirement of the vehicle.

[0167] It should be noted that the specific implementation of the power output device 200 of the hydrogen hybrid electric vehicle in this application embodiment refers to the specific implementation of the power output method of the hydrogen hybrid electric vehicle proposed in the first aspect of the above-mentioned application embodiment, and will not be repeated here.

[0168] Thirdly, based on the same inventive concept, embodiments of this application provide a storage medium storing machine-executable instructions, which, when executed by a processor, implement the power output method for a hydrogen hybrid electric vehicle proposed in the first aspect of this application.

[0169] It should be noted that the specific implementation of the storage medium in this application embodiment refers to the specific implementation of the power output method of the hydrogen hybrid electric vehicle proposed in the first aspect of the above-mentioned application embodiment, and will not be repeated here.

[0170] Fourthly, based on the same inventive concept, embodiments of this application provide a vehicle including a processor and a memory. The memory stores machine-executable instructions that can be executed by the processor, and the processor executes the machine-executable instructions to implement the power output method of the hydrogen hybrid electric vehicle proposed in the first aspect of this application.

[0171] It should be noted that the specific implementation method of the vehicle in this application embodiment refers to the specific implementation method of the power output method of the hydrogen hybrid electric vehicle proposed in the first aspect of the above-mentioned application embodiment, and will not be repeated here.

[0172] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, apparatus, or computer program products. Therefore, embodiments of the present invention can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, embodiments of the present invention can take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0173] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0174] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0175] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal equipment, causing a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0176] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.

[0177] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device 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 terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0178] The above provides a detailed description of the power output method, apparatus, medium, and vehicle for a hydrogen hybrid electric vehicle provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A power output method for a hydrogen hybrid electric vehicle, characterized in that, The hydrogen hybrid electric vehicle includes a hydrogen fuel cell and a power battery, and the method includes: Obtain the current SOC value of the power battery and the current power requirement of the vehicle; Obtain the target energy range corresponding to the current SOC value and the target power range corresponding to the current vehicle power demand; wherein, different energy ranges are used to characterize different operating conditions of the power battery, and different power ranges are used to characterize the range of vehicle power demand under different vehicle operating conditions; Obtain the target output power corresponding to the combination of the target energy range and the target power range, wherein the target output power is the output power of the hydrogen fuel cell; Control the hydrogen fuel cell to output power according to the target output power; Obtaining the target output power corresponding to the combination of the target energy range and the target power range includes: Based on the weight values ​​corresponding to the target power range and the target energy range, the corresponding target weight values ​​are obtained; wherein, different power ranges and different power ranges each correspond to different weight values. Based on the preset mapping relationship between the weight value and the preset output power, the target output power corresponding to the target weight value is determined; The power range includes a low-power range under vehicle idling conditions, a common power range under normal speed conditions, a transitional power range under acceleration or deceleration conditions, and a high-power range under conditions where the vehicle's required power reaches the peak power of the power battery; the preset output power includes a first preset output power, a second preset output power, a third preset output power, and a fourth preset output power, wherein... The first preset output power is obtained based on the accessory power of the vehicle in the low power range; the first preset output power is the accessory power of the vehicle in the low power range; The second preset output power is obtained based on the upper and lower power values ​​of the common power range when the vehicle is in the common power range, as well as the total discharge energy and total regenerative braking energy of the vehicle under normal speed conditions; the second preset output power is specifically obtained through the following formula: P = P' * M / (M + N) Wherein, P represents the second preset output power, P' represents the average of the sum of the upper limit power value and the lower limit power value of the common power range, M represents the total discharge energy of the vehicle in the common power range, and N represents the total regenerative braking energy of the vehicle in the common power range. The third preset output power is obtained based on the upper limit power value and the lower limit power value of the transition power range when the vehicle is in the transition power range; the third preset output power is the average of the sum of the upper limit power value and the lower limit power value of the transition power range; The fourth preset output power is obtained based on the peak power of the power battery when the vehicle is in the high power range, the maximum available power of the hydrogen fuel cell, the power load rate of the hydrogen fuel cell, and the preset power load time; the fourth preset output power is obtained by the following formula: Pf = P4 + P5 - x*t Wherein, Pf represents the fourth preset output power, P4 represents the rated power of the power battery, P5 represents the maximum available power of the hydrogen fuel cell, x represents the power load rate of the hydrogen fuel cell, and t represents the load time.

2. The method according to claim 1, characterized in that, Based on the weight values ​​corresponding to the target power range and the target energy range, the corresponding target weight value is obtained, including: Based on the battery characteristics of the power battery, the optimal operating range of the power battery is determined within the power range. The optimal weight value range for the hydrogen fuel cell is determined by summing the weight values ​​corresponding to the optimal operating range and the weight values ​​corresponding to all power ranges. Based on the preset mapping relationship between weight values ​​and preset output power, the target output power corresponding to the target weight value is determined, including: If the target weight value is less than the lower limit of the optimal weight value range, the target output power of the hydrogen fuel cell is determined to be the preset minimum power value. When the target weight value is within the optimal weight value range, the target output power corresponding to the target weight value is determined based on the preset mapping relationship between the weight value and the preset output power. If the target weight value is greater than the upper limit weight value within the optimal weight value range, the target output power of the hydrogen fuel cell is determined to be the maximum usable power of the hydrogen fuel cell.

3. The method according to claim 1, characterized in that, The commonly used power range includes a preset number of commonly used power sub-ranges; the preset output power corresponding to each commonly used power sub-range is obtained based on the upper limit power value, the lower limit power value of the commonly used power sub-range, and the total discharge energy and total regenerative braking energy of the vehicle under normal speed conditions; The transition power range includes an acceleration transition power sub-range and a deceleration transition power sub-range; the preset output power corresponding to the acceleration transition power sub-range is obtained based on the upper limit power value and the lower limit power value of the acceleration transition power sub-range, and the preset output power corresponding to the deceleration transition power sub-range is obtained based on the upper limit power value and the lower limit power value of the deceleration transition power sub-range.

4. The method according to claim 1, characterized in that, Obtain the current power requirement of the entire vehicle, including: Obtain the voltage and current data of the drive motor; The product of the voltage data and the current data is taken as the current vehicle power requirement.

5. A power output device for a hydrogen hybrid electric vehicle, characterized in that, The device is used in a hydrogen hybrid electric vehicle, which includes a hydrogen fuel cell and a power battery. The device includes: The first acquisition module is used to acquire the current SOC value of the power battery and the current power requirement of the vehicle. The second acquisition module is used to acquire the target power range corresponding to the current SOC value and the target power range corresponding to the current vehicle power demand; wherein, different power ranges are used to characterize different operating conditions of the power battery, and different power ranges are used to characterize the range of vehicle power demand under different vehicle operating conditions. The third acquisition module is used to acquire the target output power corresponding to the combination of the target energy range and the target power range, wherein the target output power is the output power of the hydrogen fuel cell. A power control module is used to control the hydrogen fuel cell to output power according to the target output power; The third acquisition module includes: The target weight value acquisition submodule is used to acquire the corresponding target weight value based on the weight values ​​corresponding to the target power range and the target energy range respectively; wherein, different power ranges and different power ranges correspond to different weight values. The target output power determination submodule is used to determine the target output power corresponding to the target weight value based on the mapping relationship between the preset weight value and the preset output power. The power range includes a low-power range under vehicle idling conditions, a common power range under normal speed conditions, a transitional power range under acceleration or deceleration conditions, and a high-power range under conditions where the vehicle's required power reaches the peak power of the power battery; the preset output power includes a first preset output power, a second preset output power, a third preset output power, and a fourth preset output power, wherein... The first preset output power is obtained based on the accessory power of the vehicle in the low power range; the first preset output power is the accessory power of the vehicle in the low power range; The second preset output power is obtained based on the upper and lower power values ​​of the common power range when the vehicle is in the common power range, as well as the total discharge energy and total regenerative braking energy of the vehicle under normal speed conditions; the second preset output power is specifically obtained through the following formula: P = P' * M / (M + N) Wherein, P represents the second preset output power, P' represents the average of the sum of the upper limit power value and the lower limit power value of the common power range, M represents the total discharge energy of the vehicle in the common power range, and N represents the total regenerative braking energy of the vehicle in the common power range. The third preset output power is obtained based on the upper limit power value and the lower limit power value of the transition power range when the vehicle is in the transition power range; the third preset output power is the average of the sum of the upper limit power value and the lower limit power value of the transition power range; The fourth preset output power is obtained based on the peak power of the power battery when the vehicle is in the high power range, the maximum available power of the hydrogen fuel cell, the power load rate of the hydrogen fuel cell, and the preset power load time; the fourth preset output power is obtained by the following formula: Pf = P4 + P5 - x*t Wherein, Pf represents the fourth preset output power, P4 represents the rated power of the power battery, P5 represents the maximum available power of the hydrogen fuel cell, x represents the power load rate of the hydrogen fuel cell, and t represents the load time.

6. The apparatus according to claim 5, characterized in that, The second acquisition module includes: The target weight value acquisition submodule is used to acquire the corresponding target weight value based on the weight values ​​corresponding to the target power range and the target energy range respectively; wherein, different power ranges and different power ranges correspond to different weight values. The target output power determination submodule is used to determine the target output power corresponding to the target weight value based on the mapping relationship between the preset weight value and the preset output power.

7. A storage medium, characterized in that, The storage medium stores machine-executable instructions, which, when executed by a processor, implement the method as described in any one of claims 1-4.

8. A vehicle, characterized in that, The method includes a processor and a memory, the memory storing machine-executable instructions that can be executed by the processor, the processor executing the machine-executable instructions to implement the method as described in any one of claims 1-4.

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