An evaluation method and system for the cruising range and energy efficiency performance of a fuel cell vehicle

Abstract

The present application provides a method and system for evaluating the driving range and energy efficiency performance of a fuel cell vehicle, which obtains standardized evaluation indicators by calculating multiple initial evaluation indicators and performing standardization processing; performs principal component analysis on the multiple standardized evaluation indicators to obtain main evaluation indicators and corresponding contribution rates, and determines target evaluation indicators of a target fuel cell vehicle; and calculates evaluation results based on the target evaluation indicators and the corresponding contribution rates; that is, multiple initial evaluation indicators are calculated and standardized, and principal component analysis is performed based on the standardized evaluation indicators to obtain main evaluation indicators and corresponding contribution rates, target evaluation indicators are determined based on the main evaluation indicators and the corresponding contribution rates, and evaluation results are calculated based on the target evaluation indicators and the corresponding contribution rates, and redundant features are removed on the basis of comprehensively considering multiple evaluation indicators of the target fuel cell vehicle, thereby reducing evaluation complexity while improving evaluation accuracy.

Description

Technical Field

[0001] The present application relates to the technical field of fuel cell vehicle evaluation, and specifically to a method and system for evaluating the driving range and energy efficiency performance of a fuel cell vehicle. Background Art

[0002] The emergence of new energy vehicles powered by fuel cells has reduced traditional vehicles' reliance on limited fossil fuels, increasing energy diversity and sustainability. Hydrogen-oxygen fuel cells convert hydrogen and oxygen into electricity, with the chemical reactions primarily involving hydrogen oxidation and oxygen reduction. Driving range and energy efficiency are key performance indicators for evaluating hydrogen-oxygen fuel cells. Compared to traditional fuel-powered vehicles, the energy-efficiency relationship of fuel cells in new energy vehicles has become a key concern.

[0003] Current evaluations of fuel cell vehicle range and energy efficiency often rely on a single metric, failing to fully consider the correlations between multiple factors. Alternatively, multiple evaluation metrics are used without fully accounting for their redundancy, leading to complex evaluations. Therefore, a method is needed that comprehensively considers multiple metrics to accurately evaluate the range and energy efficiency of fuel cell vehicles. Summary of the Invention

[0004] In order to solve the above technical problems, the present application is proposed. The embodiments of the present application provide a method and system for evaluating the driving range and energy efficiency performance of a fuel cell vehicle.

[0005] According to one aspect of the present application, a method for evaluating the driving range and energy efficiency performance of a fuel cell vehicle is provided, comprising: calculating a plurality of initial evaluation indicators of a target fuel cell vehicle; wherein the plurality of initial evaluation indicators include a unit mass energy consumption evaluation indicator, a hydrogen consumption rate evaluation indicator, a comprehensive driving range evaluation indicator and an average comprehensive transmission efficiency evaluation indicator, the unit mass energy consumption evaluation indicator represents the average unit power consumption of the target fuel cell vehicle calculated according to the total vehicle mass, the hydrogen consumption rate evaluation indicator represents the hydrogen consumption per unit mileage of the target fuel cell vehicle, the comprehensive driving range evaluation indicator represents the comprehensive driving range of the target fuel cell vehicle, and the average comprehensive transmission efficiency evaluation indicator represents the average transmission efficiency of the target fuel cell vehicle; standardizing the plurality of initial evaluation indicators to obtain standardized evaluation indicators; performing principal component analysis on the plurality of standardized evaluation indicators to obtain principal evaluation indicators and corresponding contribution rates; determining target evaluation indicators of the target fuel cell vehicle based on the principal evaluation indicators and the corresponding contribution rates; and calculating an evaluation result of the target fuel cell vehicle based on the target evaluation indicators and the corresponding contribution rates.

[0006] In one embodiment, the calculation of the multiple initial evaluation indicators of the target fuel cell vehicle includes: the calculation formula of the unit mass energy consumption evaluation indicator is:

[0007] ;

[0008] in, E m is the energy consumption per unit mass, E is the total energy consumption, m The curb weight of the target fuel cell vehicle.

[0009] In one embodiment, the calculation of the multiple initial evaluation indicators of the target fuel cell vehicle includes: the calculation formula of the hydrogen consumption rate evaluation indicator is:

[0010] ;

[0011] ;

[0012] ;

[0013] in, is the hydrogen consumption rate, is the hydrogen consumption, is the corrected hydrogen consumption, D is the mileage, is the temperature correction factor for the consumption rate, is the set temperature of the fuel cell cooling system thermostat, is the fuel cell temperature, is the initial ambient temperature.

[0014] In one embodiment, the calculation of the multiple initial evaluation indicators of the target fuel cell vehicle includes: the calculation formula of the comprehensive driving range evaluation indicator is:

[0015] ；

[0016] ；

[0017] ；

[0018] ；

[0019] ；

[0020] in, For comprehensive driving mileage, The driving history contributed to the fuel cell system, The driving history contributed to the power battery, is the driving mode influencing factor, which represents the efficiency of the target fuel cell vehicle hybrid system. is the temperature correction factor for the driving range, Contribution to the energy proportion of the fuel cell system, The proportion of energy contributed to the power system, Contributing energy to the fuel cell system, Contribute energy to the power battery, D For mileage.

[0021] In one embodiment, the calculation of the multiple initial evaluation indicators of the target fuel cell vehicle includes: the calculation formula of the average comprehensive transmission efficiency evaluation indicator is:

[0022] ;

[0023] in, is the average comprehensive transmission efficiency, is the temperature correction factor for efficiency, is the theoretical value of the total driving energy of the cycle condition, It indicates the increased energy in the battery after the cycle is completed. The energy contained in the consumed hydrogen, Energy charged into the battery for regenerative braking, It is the energy reduced in the battery after the cycle is completed. is the average discharge efficiency of the battery, For fuel cell efficiency.

[0024] In one embodiment, the standardization of the multiple initial evaluation indicators to obtain standardized evaluation indicators includes: normalizing the multiple initial evaluation indicators of multiple target fuel cell vehicles to obtain an evaluation sample matrix; wherein the elements in the evaluation sample matrix represent the normalized initial evaluation indicators of the corresponding target fuel cell vehicles.

[0025] In one embodiment, performing principal component analysis on the plurality of standardized evaluation indicators to obtain the main evaluation indicators and the corresponding contribution rates includes: constructing a covariance matrix of the evaluation sample matrix; calculating the eigenvalues of the covariance matrix; and determining the main evaluation indicators and the corresponding contribution rates based on the eigenvalues of the covariance matrix.

[0026] In one embodiment, determining the target evaluation index of the target fuel cell vehicle based on the main evaluation index and the corresponding contribution rate includes: arranging the eigenvalues of the covariance matrix in descending order; calculating the sum of the contribution rates corresponding to the main evaluation indicators corresponding to multiple eigenvalues in turn to obtain a cumulative contribution rate; if the cumulative contribution rate is greater than a preset contribution rate threshold, then using the multiple main evaluation indicators corresponding to the cumulative contribution rate as the target evaluation index.

[0027] In one embodiment, the calculation of the evaluation result of the target fuel cell vehicle based on the target evaluation indicator and the corresponding contribution rate includes: performing weighted summation on the target evaluation indicator based on the contribution rate of the target evaluation indicator to obtain the evaluation result of the target fuel cell vehicle.

[0028] According to another aspect of the present application, a fuel cell vehicle driving range and energy efficiency performance evaluation system is provided, comprising: an initial index calculation module, for calculating a plurality of initial evaluation indicators of a target fuel cell vehicle; wherein the plurality of initial evaluation indicators include a unit mass energy consumption evaluation indicator, a hydrogen consumption rate evaluation indicator, a comprehensive driving range evaluation indicator and an average comprehensive transmission efficiency evaluation indicator, the unit mass energy consumption evaluation indicator represents the average unit power consumption of the target fuel cell vehicle calculated according to the vehicle mass, the hydrogen consumption rate evaluation indicator represents the hydrogen consumption per unit mileage of the target fuel cell vehicle, and the comprehensive driving range evaluation indicator represents the average comprehensive transmission efficiency evaluation indicator of the target fuel cell vehicle. The comprehensive driving mileage of the target fuel cell vehicle, the average comprehensive transmission efficiency evaluation index represents the average transmission efficiency of the target fuel cell vehicle; an index standardization module is used to standardize the multiple initial evaluation indicators to obtain standardized evaluation indicators; a main evaluation index analysis module is used to perform principal component analysis on the multiple standardized evaluation indicators to obtain main evaluation indicators and corresponding contribution rates; a target evaluation index determination module is used to determine the target evaluation indicators of the target fuel cell vehicle based on the main evaluation indicators and the corresponding contribution rates; an evaluation result calculation module is used to calculate the evaluation result of the target fuel cell vehicle based on the target evaluation indicators and the corresponding contribution rates.

[0029] The present application provides a method and system for evaluating the driving range and energy efficiency performance of a fuel cell vehicle, which obtains multiple initial evaluation indicators of a target fuel cell vehicle by calculation; wherein the multiple initial evaluation indicators include a unit mass energy consumption evaluation indicator, a hydrogen consumption rate evaluation indicator, a comprehensive driving range evaluation indicator and an average comprehensive transmission efficiency evaluation indicator, the unit mass energy consumption evaluation indicator represents the average unit power consumption of the target fuel cell vehicle calculated according to the vehicle mass, the hydrogen consumption rate evaluation indicator represents the hydrogen consumption per unit mileage of the target fuel cell vehicle, the comprehensive driving range evaluation indicator represents the comprehensive driving range of the target fuel cell vehicle, and the average comprehensive transmission efficiency evaluation indicator represents the average transmission efficiency of the target fuel cell vehicle; the multiple initial evaluation indicators are standardized to obtain a standardized evaluation indicator Indicators; principal component analysis is performed on multiple standardized evaluation indicators to obtain main evaluation indicators and corresponding contribution rates; based on the main evaluation indicators and the corresponding contribution rates, the target evaluation indicators of the target fuel cell vehicle are determined; based on the target evaluation indicators and the corresponding contribution rates, the evaluation results of the target fuel cell vehicle are calculated; that is, multiple initial evaluation indicators of the target fuel cell vehicle are calculated and standardized, and principal component analysis is performed based on the standardized evaluation indicators to obtain main evaluation indicators and corresponding contribution rates, target evaluation indicators are determined according to the main evaluation indicators and the corresponding contribution rates, and the evaluation results are calculated based on the target evaluation indicators and the corresponding contribution rates, and redundant features are removed on the basis of comprehensively considering multiple evaluation indicators of the target fuel cell vehicle, thereby reducing the evaluation complexity while improving the evaluation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and other purposes, features, and advantages of the present application will become more apparent through a more detailed description of the embodiments of the present application in conjunction with the accompanying drawings. The accompanying drawings are intended to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the drawings, the same reference numerals generally represent the same components or steps.

[0031] Figure 1 It is a flow chart of a method for evaluating the driving range and energy efficiency performance of a fuel cell vehicle provided by an exemplary embodiment of the present application.

[0032] Figure 2 It is a structural diagram of a fuel cell vehicle driving range and energy efficiency performance evaluation system provided by an exemplary embodiment of the present application.

[0033] Figure 3 It is a structural diagram of an electronic device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0034] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described herein.

[0035] Figure 1 This is a flow chart of a method for evaluating the driving range and energy efficiency of a fuel cell vehicle provided by an exemplary embodiment of the present application. Figure 1 As shown, the evaluation method for the fuel cell vehicle driving range and energy efficiency performance includes the following steps:

[0036] Step 110: Calculate and obtain multiple initial evaluation indicators of the target fuel cell vehicle.

[0037] Among them, multiple initial evaluation indicators include a unit mass energy consumption evaluation indicator, a hydrogen consumption rate evaluation indicator, a comprehensive driving range evaluation indicator, and an average comprehensive transmission efficiency evaluation indicator. The unit mass energy consumption evaluation indicator represents the average unit power consumption of the target fuel cell vehicle calculated based on the total vehicle mass, the hydrogen consumption rate evaluation indicator represents the hydrogen consumption per unit mileage of the target fuel cell vehicle, the comprehensive driving range evaluation indicator represents the comprehensive driving range of the target fuel cell vehicle, and the average comprehensive transmission efficiency evaluation indicator represents the average transmission efficiency of the target fuel cell vehicle. This application comprehensively considers the factors affecting the driving range of the target fuel cell vehicle based on its operating principle and performance characteristics, and selects multiple initial evaluation indicators, including a unit mass energy consumption evaluation indicator and a hydrogen consumption rate evaluation indicator based on the fuel economy dimension, a comprehensive driving range evaluation indicator based on the practical applicability dimension, and an average comprehensive transmission efficiency evaluation indicator based on the environmental benefit dimension.

[0038] Step 120: Standardize the multiple initial evaluation indicators to obtain standardized evaluation indicators.

[0039] Since different evaluation indicators have different units and dimensions, directly taking a weighted average will affect the accuracy of the calculation. Therefore, this application standardizes these initial evaluation indicators to obtain standardized evaluation indicators, thereby facilitating the calculation of subsequent evaluation results.

[0040] Step 130: Perform principal component analysis on the multiple standardized evaluation indicators to obtain the main evaluation indicators and corresponding contribution rates.

[0041] This application conducts principal component analysis on multiple standardized evaluation indicators to determine the main factors that affect the driving range and energy efficiency performance of the target fuel cell vehicle, namely the main evaluation indicators, and calculates the contribution rate of each main evaluation indicator.

[0042] Step 140: Determine the target evaluation index of the target fuel cell vehicle based on the main evaluation index and the corresponding contribution rate.

[0043] After determining the main evaluation indicators and the corresponding contribution rates, this application determines the target evaluation indicators of the target fuel cell vehicle based on the main evaluation indicators and the corresponding contribution rates, reducing the calculation difficulty while ensuring the accuracy of the evaluation.

[0044] Step 150: Based on the target evaluation index and the corresponding contribution rate, an evaluation result of the target fuel cell vehicle is calculated.

[0045] After determining the target evaluation index and the corresponding contribution rate, the present application calculates the evaluation result of the target fuel cell vehicle based on the target evaluation index and the corresponding contribution rate.

[0046] The present application provides a method for evaluating the driving range and energy efficiency performance of a fuel cell vehicle, which obtains multiple initial evaluation indicators of a target fuel cell vehicle by calculation; wherein the multiple initial evaluation indicators include a unit mass energy consumption evaluation indicator, a hydrogen consumption rate evaluation indicator, a comprehensive driving range evaluation indicator and an average comprehensive transmission efficiency evaluation indicator, the unit mass energy consumption evaluation indicator represents the average unit power consumption of the target fuel cell vehicle calculated according to the total vehicle mass, the hydrogen consumption rate evaluation indicator represents the hydrogen consumption per unit mileage of the target fuel cell vehicle, the comprehensive driving range evaluation indicator represents the comprehensive driving range of the target fuel cell vehicle, and the average comprehensive transmission efficiency evaluation indicator represents the average transmission efficiency of the target fuel cell vehicle; the multiple initial evaluation indicators are standardized to obtain a standardized evaluation index The invention discloses a method for obtaining a target fuel cell vehicle by calculating the target evaluation index and the corresponding contribution rate; performing principal component analysis on multiple standardized evaluation indexes to obtain principal evaluation indexes and corresponding contribution rates; determining target evaluation indexes of a target fuel cell vehicle based on the principal evaluation indexes and the corresponding contribution rates; calculating an evaluation result of a target fuel cell vehicle based on the target evaluation indexes and the corresponding contribution rates; that is, calculating and standardizing multiple initial evaluation indexes of a target fuel cell vehicle, performing principal component analysis on the standardized evaluation indexes to obtain principal evaluation indexes and corresponding contribution rates, determining target evaluation indexes based on the principal evaluation indexes and the corresponding contribution rates, and calculating an evaluation result based on the target evaluation indexes and the corresponding contribution rates, removing redundant features on the basis of comprehensively considering multiple evaluation indexes of the target fuel cell vehicle, thereby reducing the evaluation complexity while improving the evaluation accuracy.

[0047] In one embodiment, the specific implementation of the above step 110 may be: the calculation formula of the unit mass energy consumption evaluation index is:

[0048] ;

[0049] in, E mis the energy consumption per unit mass, E is the total energy consumption, m The curb weight of the target fuel cell vehicle.

[0050] The energy consumption per unit mass evaluation metric directly reflects the target fuel cell vehicle's energy utilization efficiency during driving. Low energy consumption per unit mass means the target fuel cell vehicle's powertrain can convert energy more efficiently, extending its driving range. Considering the impact of high and low temperatures on efficiency, temperature can affect fuel cell efficiency, particularly at high temperatures, which can lead to poor heat dissipation and overheating, while at low temperatures, reaction efficiency decreases. Therefore, the average energy consumption per unit mass, calculated based on the vehicle's mass, can quantify the specific impact of high and low temperatures on fuel cell efficiency.

[0051] In one embodiment, the specific implementation of the above step 110 may be: the calculation formula of the hydrogen consumption rate evaluation index is:

[0052] ;

[0053] ;

[0054] ;

[0055] in, is the hydrogen consumption rate, is the hydrogen consumption, is the corrected hydrogen consumption, D is the mileage, is the temperature correction factor for the consumption rate, is the set temperature of the fuel cell cooling system thermostat, is the fuel cell temperature, is the initial ambient temperature.

[0056] The hydrogen consumption rate directly reflects the hydrogen utilization efficiency of the target fuel cell vehicle. In high or low temperature environments, hydrogen storage and consumption are affected by temperature. Therefore, comparing the hydrogen consumption rate at different temperatures can effectively evaluate the performance of the target fuel cell vehicle in different environments. Considering the impact of temperature on hydrogen storage and consumption, at high temperatures, the density of hydrogen storage will decrease, and the vaporization rate will increase, which may lead to accelerated hydrogen consumption; at low temperatures, the fluidity and vaporization rate of hydrogen may decrease, affecting the hydrogen supply efficiency. Therefore, this application can use this indicator to reveal the specific impact of temperature changes on hydrogen consumption.

[0057] In one embodiment, the specific implementation of step 110 may be: the calculation formula of the comprehensive driving range evaluation index is:

[0058] ；

[0059] ；

[0060] ；

[0061] ；

[0062] ；

[0063] in, For comprehensive driving mileage, The driving history contributed to the fuel cell system, The driving history contributed to the power battery, is the driving mode influencing factor, which represents the efficiency of the target fuel cell vehicle hybrid system. is the temperature correction factor for the driving range, Contribution to the energy proportion of the fuel cell system, The proportion of energy contributed to the power system, Contributing energy to the fuel cell system, Contribute energy to the power battery, D For mileage.

[0064] The comprehensive driving range can reflect the actual driving ability of the target fuel cell vehicle in high and low temperature environments, and comprehensively considers multiple aspects such as energy consumption, hydrogen utilization rate and system efficiency; considering the comprehensive impact of high and low temperatures, high temperature and low temperature will affect the overall performance of the target fuel cell vehicle, especially hydrogen consumption, system efficiency and battery performance. Therefore, this application can use this indicator to comprehensively evaluate the differences in driving range under different environmental conditions and comprehensively evaluate the actual driving range under different ambient temperatures.

[0065] In one embodiment, the specific implementation of the above step 110 may be: the calculation formula of the average comprehensive transmission efficiency evaluation index is:

[0066] ;

[0067] in, is the average comprehensive transmission efficiency, is the temperature correction factor for efficiency, is the theoretical value of the total driving energy of the cycle condition, It indicates the increased energy in the battery after the cycle is completed. The energy contained in the consumed hydrogen, Energy charged into the battery for regenerative braking, It is the energy reduced in the battery after the cycle is completed. is the average discharge efficiency of the battery, For fuel cell efficiency.

[0068] Temperature changes not only affect the efficiency of individual components but also the performance of the entire energy system. The average comprehensive transmission efficiency can provide a holistic performance evaluation, revealing the impact of high or low temperatures on the various subsystems of the target fuel cell vehicle. Secondly, high and low temperatures have different effects on various components: in high temperature environments, the energy efficiency of the thermal management system will decrease, which may lead to increased energy consumption of the cooling system; in low temperature environments, the efficiency of the fuel cell stack will decrease. The average comprehensive transmission efficiency can help identify and quantify these effects, thereby optimizing the design of the target fuel cell vehicle. This application evaluates the energy utilization efficiency of the target fuel cell vehicle through average comprehensive transmission efficiency analysis at different temperatures.

[0069] Preferably, during the target fuel cell vehicle range test (calculating the aforementioned multiple initial evaluation indicators using the measured corresponding parameters), this application dynamically corrects the resistance parameters at different ambient temperatures based on temperature to eliminate temperature interference with the test results. This dynamically corrects parameters such as fuel cell system efficiency, hydrogen consumption rate, and transmission energy consumption, which in turn affect the aforementioned initial evaluation indicators. Specifically, the resistance parameter correction formula is as follows:

[0070] ;

[0071] in, is the converted running resistance, v is the vehicle speed, t is the average temperature on the test road, p is the average atmospheric pressure on the test road, is the rolling resistance temperature correction coefficient, which is 0.00864 for light vehicles and 0.006 for medium and heavy vehicles. 、 、 is a constant obtained by fitting the actual sliding test results.

[0072] In one embodiment, the specific implementation method of the above-mentioned step 120 can be: after normalizing multiple initial evaluation indicators of multiple target fuel cell vehicles, an evaluation sample matrix is obtained; wherein, the elements in the evaluation sample matrix represent the normalized initial evaluation indicators of the corresponding target fuel cell vehicles.

[0073] This application uses range normalization to normalize the data of each initial evaluation indicator to the interval [0, 1], so that the value of each initial evaluation indicator is in the same dimensional range and the dimensional differences between indicators are eliminated. The specific normalization formula is:

[0074] ;

[0075] in, X is the value before normalization, X norm is the standardized value, X max is the maximum value of the initial evaluation index, X min is the minimum value of the initial evaluation indicator.

[0076] The normalized initial evaluation indicators are combined to obtain the evaluation sample matrix (three fuel cell experimental prototype vehicles are used as examples below):

[0077] ;

[0078] in, Indicates the i The normalized number of target fuel cell vehicles j Initial evaluation indicators, 1≤ i ≤3, 1≤ j ≤4.

[0079] In one embodiment, the specific implementation of the above step 130 may be: constructing a covariance matrix of the evaluation sample matrix; calculating the eigenvalues of the covariance matrix; and determining the main evaluation index and the corresponding contribution rate based on the eigenvalues of the covariance matrix.

[0080] After obtaining the evaluation sample matrix through standardization, this application further constructs the covariance matrix of the evaluation sample matrix, where the covariance matrix is:

[0081] ;

[0082] in, n The number of fuel cell experimental prototypes (e.g. 3); The evaluation sample matrix The transposed matrix of .

[0083] by n =3 as an example, the covariance matrix is:

[0084] ;

[0085] By calculating the covariance matrix C The eigenvalue of ,p≤4 .

[0086] Determine the corresponding main evaluation index (corresponding to the eigenvalue) based on the eigenvalue, and calculate the contribution rate of each main evaluation index. The calculation formula of the contribution rate is as follows:

[0087] ;

[0088] in, For the i The contribution rate of the main evaluation indicators.

[0089] In one embodiment, the specific implementation method of the above-mentioned step 140 can be: arranging the eigenvalues of the covariance matrix in order from large to small; calculating the sum of the contribution rates corresponding to the main evaluation indicators corresponding to multiple eigenvalues in turn to obtain the cumulative contribution rate; if the cumulative contribution rate is greater than the preset contribution rate threshold, then using the multiple main evaluation indicators corresponding to the cumulative contribution rate as target evaluation indicators.

[0090] The present application can arrange the eigenvalues of the covariance matrix from large to small, and calculate the sum of the contribution rates of multiple main evaluation indicators that are arranged at the top. For example, the sum of the contribution rates of the selected multiple main evaluation indicators is required to be greater than 85% to ensure that the selected main evaluation indicators include most of the information of the initial evaluation indicators. Therefore, the present application can stop by accumulating one by one until the cumulative contribution rate is greater than the preset contribution rate threshold, and use the main evaluation indicators corresponding to the multiple contribution rates involved in the accumulation as the target evaluation indicators.

[0091] In one embodiment, the specific implementation of the above step 150 may be: performing weighted summation on the target evaluation indicators based on the contribution rates of the target evaluation indicators to obtain the evaluation result of the target fuel cell vehicle.

[0092] After determining the target evaluation indicators, this application obtains the evaluation results of the target fuel cell vehicle by weighted summing the target evaluation indicators and their corresponding contribution rates. The specific calculation formula is as follows:

[0093] ;

[0094] in, F is the evaluation result (i.e. score) of the target fuel cell vehicle, For the i target evaluation indicators, For the i The contribution rate of each target evaluation indicator.

[0095] Figure 2 This is a schematic diagram of the structure of a fuel cell vehicle range and energy efficiency performance evaluation system provided by an exemplary embodiment of the present application. Figure 2As shown, the fuel cell vehicle driving range and energy efficiency performance evaluation system 20 includes: an initial indicator calculation module 21, which is used to calculate multiple initial evaluation indicators of the target fuel cell vehicle; wherein the multiple initial evaluation indicators include a unit mass energy consumption evaluation indicator, a hydrogen consumption rate evaluation indicator, a comprehensive driving range evaluation indicator and an average comprehensive transmission efficiency evaluation indicator, wherein the unit mass energy consumption evaluation indicator represents the average unit power consumption of the target fuel cell vehicle calculated according to the total vehicle weight, the hydrogen consumption rate evaluation indicator represents the hydrogen consumption per unit mileage of the target fuel cell vehicle, the comprehensive driving range evaluation indicator represents the comprehensive driving range of the target fuel cell vehicle, and the average comprehensive transmission efficiency evaluation indicator represents the average transmission efficiency of the target fuel cell vehicle; an indicator standardization module 22, which is used to standardize the multiple initial evaluation indicators to obtain standardized evaluation indicators; a main evaluation indicator analysis module 23, which is used to perform principal component analysis on the multiple standardized evaluation indicators to obtain main evaluation indicators and corresponding contribution rates; a target evaluation indicator determination module 24, which is used to determine the target evaluation indicators of the target fuel cell vehicle based on the main evaluation indicators and the corresponding contribution rates; and an evaluation result calculation module 25, which is used to calculate the evaluation result of the target fuel cell vehicle based on the target evaluation indicators and the corresponding contribution rates.

[0096] The present application provides an evaluation system for the driving range and energy efficiency performance of a fuel cell vehicle, which calculates multiple initial evaluation indicators of a target fuel cell vehicle through an initial indicator calculation module 21; wherein the multiple initial evaluation indicators include a unit mass energy consumption evaluation indicator, a hydrogen consumption rate evaluation indicator, a comprehensive driving range evaluation indicator and an average comprehensive transmission efficiency evaluation indicator, the unit mass energy consumption evaluation indicator represents the average unit power consumption of the target fuel cell vehicle calculated according to the vehicle mass, the hydrogen consumption rate evaluation indicator represents the hydrogen consumption per unit mileage of the target fuel cell vehicle, the comprehensive driving range evaluation indicator represents the comprehensive driving range of the target fuel cell vehicle, and the average comprehensive transmission efficiency evaluation indicator represents the average transmission efficiency of the target fuel cell vehicle; the indicator standardization module 22 standardizes the multiple initial evaluation indicators to obtain standardized evaluation indicators; the main evaluation indicators The analysis module 23 performs principal component analysis on multiple standardized evaluation indicators to obtain principal evaluation indicators and corresponding contribution rates; the target evaluation indicator determination module 24 determines the target evaluation indicators of the target fuel cell vehicle based on the principal evaluation indicators and the corresponding contribution rates; the evaluation result calculation module 25 calculates the evaluation results of the target fuel cell vehicle based on the target evaluation indicators and the corresponding contribution rates; that is, multiple initial evaluation indicators of the target fuel cell vehicle are calculated and standardized, and principal component analysis is performed based on the standardized evaluation indicators to obtain the principal evaluation indicators and the corresponding contribution rates, the target evaluation indicators are determined according to the principal evaluation indicators and the corresponding contribution rates, and the evaluation results are calculated based on the target evaluation indicators and the corresponding contribution rates, and redundant features are removed on the basis of comprehensively considering multiple evaluation indicators of the target fuel cell vehicle, thereby reducing the evaluation complexity while improving the evaluation accuracy.

[0097] In one embodiment, the initial index calculation module 21 may be further configured as follows: the calculation formula of the unit mass energy consumption evaluation index is:

[0098] ;

[0099] in, E m is the energy consumption per unit mass, E is the total energy consumption, m The curb weight of the target fuel cell vehicle.

[0100] In one embodiment, the initial index calculation module 21 may be further configured as follows: the calculation formula of the hydrogen consumption rate evaluation index is:

[0101] ;

[0102] ;

[0103] ;

[0104] in, is the hydrogen consumption rate, is the hydrogen consumption, is the corrected hydrogen consumption, D is the mileage, is the temperature correction factor for the consumption rate, is the set temperature of the fuel cell cooling system thermostat, is the fuel cell temperature, is the initial ambient temperature.

[0105] In one embodiment, the initial index calculation module 21 may be further configured as follows: the calculation formula for the comprehensive driving range evaluation index is:

[0106] ；

[0107] ；

[0108] ；

[0109] ；

[0110] ；

[0111] in, For comprehensive driving mileage, The driving history contributed to the fuel cell system, The driving history contributed to the power battery, is the driving mode influencing factor, which represents the efficiency of the target fuel cell vehicle hybrid system. is the temperature correction factor for the driving range, Contribution to the energy proportion of the fuel cell system, The proportion of energy contributed to the power system, Contributing energy to the fuel cell system, Contribute energy to the power battery, D For mileage.

[0112] In one embodiment, the initial index calculation module 21 may be further configured as follows: the calculation formula of the average comprehensive transmission efficiency evaluation index is:

[0113] ;

[0114] in, is the average comprehensive transmission efficiency, is the temperature correction factor for efficiency, is the theoretical value of the total driving energy of the cycle condition, It indicates the increased energy in the battery after the cycle is completed. The energy contained in the consumed hydrogen, Energy charged into the battery for regenerative braking, It is the energy reduced in the battery after the cycle is completed. is the average discharge efficiency of the battery, For fuel cell efficiency.

[0115] In one embodiment, the indicator standardization module 22 can be further configured to: normalize multiple initial evaluation indicators of multiple target fuel cell vehicles to obtain an evaluation sample matrix; wherein the elements in the evaluation sample matrix represent the normalized initial evaluation indicators of the corresponding target fuel cell vehicles.

[0116] In one embodiment, the main evaluation index analysis module 23 may be further configured to: construct a covariance matrix of the evaluation sample matrix; calculate the eigenvalues of the covariance matrix; and determine the main evaluation index and the corresponding contribution rate based on the eigenvalues of the covariance matrix.

[0117] In one embodiment, the above-mentioned target evaluation index determination module 24 can be further configured as: arranging the eigenvalues of the covariance matrix in order from large to small; calculating the sum of the contribution rates corresponding to the main evaluation indicators corresponding to multiple eigenvalues in turn to obtain the cumulative contribution rate; if the cumulative contribution rate is greater than the preset contribution rate threshold, then the multiple main evaluation indicators corresponding to the cumulative contribution rate are used as target evaluation indicators.

[0118] In one embodiment, the evaluation result calculation module 25 may be further configured to perform weighted summation of the target evaluation indicators based on the contribution rates of the target evaluation indicators to obtain the evaluation result of the target fuel cell vehicle.

[0119] Below, reference Figure 3 The electronic device according to the embodiment of the present application is described. The electronic device may be either or both of the first device and the second device, or a standalone device independent of them, and the standalone device may communicate with the first device and the second device to receive collected input signals from them.

[0120] Figure 3 The figure shows a block diagram of an electronic device according to an embodiment of the present application.

[0121] like Figure 3 As shown, the electronic device 10 includes one or more processors 11 and a memory 12 .

[0122] The processor 11 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 10 to perform desired functions.

[0123] The memory 12 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), a hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 11 may execute the program instructions to implement the methods of the various embodiments of the present application described above and / or other desired functions. Various contents such as input signals, signal components, and noise components may also be stored in the computer-readable storage medium.

[0124] In one example, the electronic device 10 may further include an input device 13 and an output device 14 , and these components are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0125] When the electronic device is a stand-alone device, the input device 13 may be a communication network connector, configured to receive collected input signals from the first device and the second device.

[0126] In addition, the input device 13 may also include, for example, a keyboard, a mouse, and the like.

[0127] The output device 14 can output various information to the outside, including determined distance information, direction information, etc. The output device 14 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0128] Of course, to simplify, Figure 3 Only some of the components related to the present application in the electronic device 10 are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, the electronic device 10 may further include any other appropriate components according to specific application scenarios.

[0129] In addition to the above-mentioned methods and devices, an embodiment of the present application may also be a computer program product, which includes computer program instructions, which, when executed by a processor, enable the processor to execute the steps of the method according to various embodiments of the present application described in the above-mentioned "Exemplary Method" section of this specification.

[0130] The computer program product may be written in any combination of one or more programming languages to implement the program code for performing the operations of the embodiments of the present application, including object-oriented programming languages such as Java, C++, and conventional procedural programming languages such as "C" or similar programming languages. The program code may be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0131] In addition, an embodiment of the present application may also be a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, enable the processor to execute the steps of the method according to various embodiments of the present application described in the above "Exemplary Method" section of this specification.

[0132] The computer-readable storage medium may be any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may include, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0133] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0134] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0135] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0136] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0137] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A method for evaluating the driving range and energy efficiency performance of a fuel cell vehicle, characterized in that: include: Calculating and obtaining a plurality of initial evaluation indicators of the target fuel cell vehicle; wherein the plurality of initial evaluation indicators include a unit mass energy consumption evaluation indicator, a hydrogen consumption rate evaluation indicator, a comprehensive driving range evaluation indicator, and an average comprehensive transmission efficiency evaluation indicator, the unit mass energy consumption evaluation indicator represents the average unit power consumption of the target fuel cell vehicle calculated based on the total vehicle mass, the hydrogen consumption rate evaluation indicator represents the hydrogen consumption per unit mileage of the target fuel cell vehicle, the comprehensive driving range evaluation indicator represents the comprehensive driving range of the target fuel cell vehicle, and the average comprehensive transmission efficiency evaluation indicator represents the average transmission efficiency of the target fuel cell vehicle; Standardizing the multiple initial evaluation indicators to obtain standardized evaluation indicators; Performing principal component analysis on the plurality of standardized evaluation indicators to obtain main evaluation indicators and corresponding contribution rates; Determining a target evaluation indicator for the target fuel cell vehicle based on the main evaluation indicator and the corresponding contribution rate; Calculating an evaluation result of the target fuel cell vehicle based on the target evaluation index and the corresponding contribution rate; The multiple initial evaluation indicators of the target fuel cell vehicle obtained by calculation include: The calculation formula of the average comprehensive transmission efficiency evaluation index is: ； in, is the average comprehensive transmission efficiency, is the temperature correction factor for efficiency, is the theoretical value of the total driving energy of the cycle condition, It indicates the increased energy in the battery after the cycle is completed. The energy contained in the consumed hydrogen, Energy charged into the battery for regenerative braking, It is the energy reduced in the battery after the cycle is completed. is the average discharge efficiency of the battery, For fuel cell efficiency.

2. The method for evaluating the driving range and energy efficiency performance of a fuel cell vehicle according to claim 1, characterized in that: The multiple initial evaluation indicators of the target fuel cell vehicle obtained by calculation include: The calculation formula of the unit mass energy consumption evaluation index is: ； in, E m is the energy consumption per unit mass, E is the total energy consumption, m The curb weight of the target fuel cell vehicle.

3. The method for evaluating the driving range and energy efficiency performance of a fuel cell vehicle according to claim 1, characterized in that: The multiple initial evaluation indicators of the target fuel cell vehicle obtained by calculation include: The calculation formula of the hydrogen consumption rate evaluation index is: ； ； ； in, is the hydrogen consumption rate, is the hydrogen consumption, is the corrected hydrogen consumption, D is the mileage, is the temperature correction factor for the consumption rate, is the set temperature of the fuel cell cooling system thermostat, is the fuel cell temperature, is the initial ambient temperature.

4. The method for evaluating the driving range and energy efficiency performance of a fuel cell vehicle according to claim 1, characterized in that: The multiple initial evaluation indicators of the target fuel cell vehicle obtained by calculation include: The calculation formula of the comprehensive driving range evaluation index is: ； ； ； ； ； in, For comprehensive driving mileage, The mileage contributed by the fuel cell system, The mileage contributed to the power battery, is the driving mode influencing factor, which represents the efficiency of the target fuel cell vehicle hybrid system. is the temperature correction factor for the driving range, Contribution to the energy proportion of the fuel cell system, The proportion of energy contributed to the power system, Contributing energy to the fuel cell system, Contribute energy to the power battery, D For mileage.

5. The method for evaluating the driving range and energy efficiency performance of a fuel cell vehicle according to claim 1, characterized in that: The standardization of the multiple initial evaluation indicators to obtain the standardized evaluation indicators includes: After normalizing multiple initial evaluation indicators of multiple target fuel cell vehicles, an evaluation sample matrix is obtained; wherein the elements in the evaluation sample matrix represent the normalized initial evaluation indicators of the corresponding target fuel cell vehicles.

6. The method for evaluating the driving range and energy efficiency performance of a fuel cell vehicle according to claim 5, characterized in that: The principal component analysis of the plurality of standardized evaluation indicators is performed to obtain the main evaluation indicators and the corresponding contribution rates, including: Constructing a covariance matrix of the evaluation sample matrix; Calculating eigenvalues of the covariance matrix; The main evaluation index and the corresponding contribution rate are determined based on the eigenvalues of the covariance matrix.

7. The method for evaluating the driving range and energy efficiency of a fuel cell vehicle according to claim 6, characterized in that: Determining the target evaluation index of the target fuel cell vehicle based on the main evaluation index and the corresponding contribution rate includes: Arrange the eigenvalues of the covariance matrix in descending order; Calculate the sum of the contribution rates of the main evaluation indicators corresponding to multiple eigenvalues in sequence to obtain the cumulative contribution rate; If the cumulative contribution rate is greater than a preset contribution rate threshold, the multiple main evaluation indicators corresponding to the cumulative contribution rate are used as the target evaluation indicators.

8. The method for evaluating the driving range and energy efficiency performance of a fuel cell vehicle according to claim 1, characterized in that: The evaluation result of the target fuel cell vehicle calculated based on the target evaluation index and the corresponding contribution rate includes: The target evaluation indicators are weighted and summed based on the contribution rates of the target evaluation indicators to obtain an evaluation result of the target fuel cell vehicle.

9. A fuel cell vehicle range and energy efficiency performance evaluation system, characterized in that: include: an initial index calculation module, configured to calculate a plurality of initial evaluation indicators of a target fuel cell vehicle; wherein the plurality of initial evaluation indicators include a unit mass energy consumption evaluation indicator, a hydrogen consumption rate evaluation indicator, a comprehensive driving range evaluation indicator, and an average comprehensive transmission efficiency evaluation indicator; the unit mass energy consumption evaluation indicator represents the average unit power consumption of the target fuel cell vehicle calculated based on the vehicle mass; the hydrogen consumption rate evaluation indicator represents the hydrogen consumption per unit mileage of the target fuel cell vehicle; the comprehensive driving range evaluation indicator represents the comprehensive driving range of the target fuel cell vehicle; and the average comprehensive transmission efficiency evaluation indicator represents the average transmission efficiency of the target fuel cell vehicle; An indicator standardization module, configured to perform standardization processing on the multiple initial evaluation indicators to obtain standardized evaluation indicators; A main evaluation index analysis module is used to perform principal component analysis on the plurality of standardized evaluation indicators to obtain main evaluation indicators and corresponding contribution rates; a target evaluation index determination module, configured to determine the target evaluation index of the target fuel cell vehicle based on the main evaluation index and the corresponding contribution rate; An evaluation result calculation module, configured to calculate an evaluation result of the target fuel cell vehicle based on the target evaluation index and the corresponding contribution rate; The initial indicator calculation module is further configured as follows: The calculation formula of the average comprehensive transmission efficiency evaluation index is: ； in, is the average comprehensive transmission efficiency, is the temperature correction factor for efficiency, is the theoretical value of the total driving energy of the cycle condition, It indicates the increased energy in the battery after the cycle is completed. The energy contained in the consumed hydrogen, Energy charged into the battery for regenerative braking, It is the energy reduced in the battery after the cycle is completed. is the average discharge efficiency of the battery, For fuel cell efficiency.

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