CN113128854B - New energy automobile operation safety performance inspection method, device and system - Google Patents
New energy automobile operation safety performance inspection method, device and system Download PDFInfo
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Abstract
The invention relates to the technical field of new energy automobiles, and particularly discloses a method for testing the running safety performance of a new energy automobile, which comprises the following steps: acquiring historical running state data of the new energy automobile in an annual inspection period; screening the historical running state data according to preset screening conditions to obtain charge and discharge data of the new energy automobile; determining a rapid inspection working condition of the new energy automobile according to the charge and discharge data of the new energy automobile; carrying out a simulation experiment according to the quick inspection working condition of the new energy automobile to obtain a working condition output result of the new energy automobile; and judging the power battery performance and the whole vehicle electrical safety performance of the new energy vehicle according to the working condition output result of the new energy vehicle. The method for testing the running safety performance of the new energy automobile can realize quick and automatic test on the running safety performance of the new energy automobile under the condition of not disassembling.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a new energy automobile operation safety performance inspection method, a new energy automobile operation safety performance inspection device and a new energy automobile operation safety performance inspection system.
Background
New energy automobiles become a faucet and a carrier for globally driving the overall transformation and upgrading of the automobile industry, and are important grippers and engines for promoting the continuous growth of the world economy in the future. China manufacturing 2025, long-term development planning in the automotive industry and the like definitely list new energy automobiles as key development fields.
At present, the reserve and the output and sales volume of new energy automobiles in China are at the top of the world, the reserve at the end of 2019 reaches 381 thousands of automobiles, and the high-speed growth situation is obvious. With the increase of the holding capacity of new energy automobiles, the safety problem of the new energy automobiles is more and more prominent. Data of '2019 new energy automobile consumption market research report' show that the battery safety problem is the second major factor of giving up purchasing pure electric vehicles for consumers, and the occupation ratio is up to 26%. The current new energy automobile safety performance test process is long in periodicity and large in limitation, and the existing equipment is weak in non-disassembly periodic inspection applicability and cannot meet the requirement of the whole automobile periodic inspection.
Disclosure of Invention
The invention provides a new energy automobile operation safety performance inspection method, a new energy automobile operation safety performance inspection device and a new energy automobile operation safety performance inspection system, and solves the problem that regular inspection of the whole automobile cannot be realized in the related technology.
As one aspect of the present invention, a method for checking an operation safety performance of a new energy vehicle is provided, where the method includes:
acquiring historical running state data of the new energy automobile in an annual inspection period;
screening the historical running state data according to preset screening conditions to obtain charge and discharge data of the new energy automobile;
determining a rapid inspection working condition of the new energy automobile according to the charge and discharge data of the new energy automobile;
carrying out a simulation experiment according to the quick inspection working condition of the new energy automobile to obtain a working condition output result of the new energy automobile;
and judging the power battery performance and the whole vehicle electrical safety performance of the new energy vehicle according to the working condition output result of the new energy vehicle.
Further, the acquiring historical operating state data of the new energy automobile in the annual inspection period includes:
establishing communication connection with a data acquisition platform, wherein the data acquisition platform comprises a national new energy automobile operation monitoring and management platform, a national public security traffic integrated command platform and a national defect automobile product recall comprehensive management information platform;
historical running state data of the new energy automobile in the national new energy automobile running monitoring and management platform in an annual inspection period are obtained, wherein the historical running state data comprise vehicle running speed, power battery output voltage and power battery output current.
Further, the screening the historical operating state data according to a preset screening condition to obtain the charge and discharge data of the new energy automobile comprises:
screening the historical operating state data categories according to brand categories, driving weather environments and driving road environment categories of the new energy vehicles to respectively obtain historical operating state data in the same category;
and carrying out statistical analysis on the historical running state data in the same category to obtain the charge and discharge data of the new energy automobile.
Further, the determining the rapid inspection working condition of the new energy automobile according to the charging and discharging data of the new energy automobile comprises:
determining a speed-time working condition diagram of the new energy automobile according to the charge and discharge data of the new energy automobile;
and carrying out cluster analysis on the speed-time working condition diagram of the new energy automobile to obtain the quick inspection working condition of the new energy automobile.
Further, the determining the speed-time working condition diagram of the new energy automobile according to the charging and discharging data of the new energy automobile comprises:
determining the output power of the new energy automobile according to the output current of the power battery of the new energy automobile and the running speed of the automobile;
setting the power change rate of the power battery;
determining a vehicle running speed and running time sequence of a power battery of the new energy battery under the harsh running environment according to the output power of the new energy vehicle;
forming a running working condition short-stroke segment according to a sequence of the running speed and the running time of the power battery of the new energy battery in the harsh running environment;
and taking the short-stroke segment of the running working condition as a speed-time working condition diagram of the new energy automobile.
Further, the cluster analysis is performed on the speed-time working condition diagram of the new energy automobile to obtain the rapid inspection working condition of the new energy automobile, and the method comprises the following steps:
comparing the battery output power change rate of the new energy automobile with a preset power battery power change rate;
and carrying out cluster analysis on the running condition short-stroke segments of which the battery output power change rate of the new energy automobile is greater than the preset power battery power change rate, screening and splicing to form the rapid inspection working condition of the new energy automobile.
Further, the severe driving environment includes climbing, rapid acceleration, and use of an air conditioner.
Further, according to the quick inspection operating mode of new energy automobile carries out simulation experiment, obtains new energy automobile's operating mode output result, includes:
the rapid inspection working condition of the new energy automobile is used for the hub rotating test bed to simulate the running state of the new energy automobile in a specific running scene;
acquiring power battery output characteristics of a new energy automobile, wherein the power battery output characteristics comprise power battery output voltage data and power battery output current data;
and taking the output characteristic of the power battery as a working condition output result of the new energy automobile.
Further, the power battery performance of the new energy automobile is judged according to the working condition output result of the new energy automobile, and the method comprises the following steps:
calculating the output power of the power battery under a circulation working condition according to the output voltage data and the output current data of the power battery;
calculating the SOC conversion quantity of the power battery when one cycle working condition is finished;
calculating the health coefficient of the power battery according to the output power of the power battery and the SOC conversion quantity of the power battery;
comparing the health coefficient of the power battery with a battery health threshold;
if the health coefficient of the power battery is larger than the battery health threshold value, determining that the performance of the power battery of the new energy automobile is in a good health state;
and if the health coefficient of the power battery is not greater than the battery health threshold value, determining the performance of the power battery of the new energy automobile as that the battery needs to be replaced.
Further, the whole vehicle electrical safety performance of the new energy vehicle is judged according to the working condition output result of the new energy vehicle, and the method comprises the following steps:
calculating the output power of the new energy automobile under a plurality of short-stroke working conditions according to the whole vehicle servicing quality and the vehicle running speed of the new energy automobile;
calculating the output power of the power battery under a circulation working condition according to the output voltage data and the output current data of the power battery;
calculating the decline state of the electric power and mechanical system of the new energy automobile according to the output power of the new energy automobile under the short-stroke working conditions and the output power of the power battery under the circulation working condition;
and comparing the decline state with an electric safety performance threshold value to obtain an electric safety performance output result of the whole vehicle.
As another aspect of the present invention, there is provided a new energy vehicle operation safety performance inspection device, including:
the acquisition module is used for acquiring historical running state data of the new energy automobile in an annual inspection period;
the screening module is used for screening the historical running state data according to preset screening conditions to obtain charge and discharge data of the new energy automobile;
the determining module is used for determining the rapid inspection working condition of the new energy automobile according to the charging and discharging data of the new energy automobile;
the simulation experiment module is used for carrying out simulation experiments according to the quick test working conditions of the new energy automobile to obtain working condition output results of the new energy automobile;
and the judging module is used for judging the power battery performance and the whole vehicle electrical safety performance of the new energy vehicle according to the working condition output result of the new energy vehicle.
As another aspect of the present invention, there is provided a new energy vehicle operation safety performance verification system, including: the system comprises a data acquisition device and the new energy automobile operation safety performance inspection device, wherein the data acquisition device is in communication connection with the new energy automobile operation safety performance inspection device;
the data acquisition device is used for acquiring historical running state data of the new energy automobile in an annual inspection period;
and the new energy automobile operation safety performance inspection device is used for screening and processing the historical operation state data and then judging the power battery performance and the whole automobile electrical safety performance of the new energy automobile.
Further, still include: and the vehicle-mounted data acquisition terminal is in communication connection with the new energy automobile operation safety performance inspection device and is used for acquiring the power battery output characteristics of the new energy automobile, and the power battery output characteristics comprise power battery output voltage data and power battery output current data.
According to the new energy automobile operation safety performance inspection method provided by the invention, the new energy automobile operation state data in the annual inspection period is obtained, the rapid inspection working condition is constructed according to the data, the simulation experiment is carried out, and the power battery performance and the whole automobile electrical safety performance of the new energy automobile are judged according to the experiment result, so that the new energy automobile operation safety performance inspection method can realize rapid automatic inspection on the power battery performance and the like of the new energy automobile without disassembly, and the new energy automobile operation safety performance inspection method is short in test period compared with the traditional battery charge-discharge detection method, is more efficient and intelligent, and meets the requirement of the new energy automobile periodic inspection.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a new energy vehicle operation safety performance inspection method provided by the invention.
Fig. 2 is a working schematic diagram of the inspection condition data acquisition terminal provided by the invention.
FIG. 3 is a flow chart of a method for constructing a rapid inspection condition according to the present invention.
Fig. 4 is a working schematic diagram of the vehicle-mounted data acquisition device provided by the invention.
Fig. 5 is a structural block diagram of the new energy automobile operation safety performance inspection device provided by the invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this embodiment, a method for checking operation safety performance of a new energy vehicle is provided, and fig. 1 is a flowchart of a method for checking operation safety performance of a new energy vehicle according to an embodiment of the present invention, as shown in fig. 1, including:
s110, acquiring historical running state data of the new energy automobile in an annual inspection period;
specifically, the annual inspection period is one year, namely historical operating state data of the new energy automobile with the average automobile age within one year are obtained.
The specific acquisition mode can be acquired through the data acquisition terminal, and data acquired by the data acquisition terminal is acquired.
S120, screening the historical running state data according to preset screening conditions to obtain charge and discharge data of the new energy automobile;
s130, determining a rapid inspection working condition of the new energy automobile according to the charge and discharge data of the new energy automobile;
s140, carrying out a simulation experiment according to the quick inspection working condition of the new energy automobile to obtain a working condition output result of the new energy automobile;
and S150, judging the power battery performance and the whole vehicle electrical safety performance of the new energy vehicle according to the working condition output result of the new energy vehicle.
According to the new energy automobile operation safety performance inspection method provided by the invention, the new energy automobile operation state data in the annual inspection period is obtained, the rapid inspection working condition is constructed according to the data, the simulation experiment is carried out, and the power battery performance and the whole automobile electrical safety performance of the new energy automobile are judged according to the experiment result, so that the new energy automobile operation safety performance inspection method can realize rapid automatic inspection on the power battery performance and the like of the new energy automobile without disassembly, and the new energy automobile operation safety performance inspection method is short in test period compared with the traditional battery charge-discharge detection method, is more efficient and intelligent, and meets the requirement of the new energy automobile periodic inspection.
Specifically, the acquiring historical operating state data of the new energy automobile in the annual inspection period includes:
establishing communication connection with a data acquisition platform, wherein the data acquisition platform comprises a national new energy automobile operation monitoring and management platform, a national public security traffic integrated command platform and a national defect automobile product recall comprehensive management information platform;
historical running state data of the new energy automobile in the national new energy automobile running monitoring and management platform in an annual inspection period are obtained, wherein the historical running state data comprise vehicle running speed, power battery output voltage and power battery output current.
As shown in fig. 2, the data acquisition device can acquire vehicle running state data of the new energy vehicle in an annual inspection period, and is used for constructing a new energy vehicle rapid detection working condition, and the vehicle running state data is mainly acquired through a national new energy vehicle running monitoring and management platform, a national public security traffic integrated command platform and a national defect vehicle product recall integrated management information platform according to part 3 of technical specification of electric vehicle remote service and management system: the communication protocol and data format (GB/T32960.3-2016) and the enterprise proprietary protocol collect vehicle running state data of vehicles in an annual inspection period according to vehicle brands, running weather environments, running road environments and the like, wherein the vehicle running state data comprises but is not limited to vehicle running speed, power battery output voltage and power battery output current.
Specifically, the screening the historical operating state data according to a preset screening condition to obtain charge and discharge data of the new energy automobile includes:
screening the historical operating state data categories according to brand categories, driving weather environments and driving road environment categories of the new energy vehicles to respectively obtain historical operating state data in the same category;
and carrying out statistical analysis on the historical running state data in the same category to obtain the charge and discharge data of the new energy automobile.
In the embodiment of the present invention, the preset screening conditions may include brand categories, driving weather environments, driving road environments, and the like, and may also include other screening conditions set as needed, which is not limited herein.
For example, if the brand category may be byadi, the driving weather environment is rainy days, and the driving road environment is an expressway, the obtained historical operating state data categories are screened according to several screening conditions of byadi, rainy days, and expressway to obtain historical operating state data under the conditions of byadi, rainy days, and expressway, and then statistical analysis is performed on the screened historical operating state data to obtain charging and discharging data of the new energy automobile.
Specifically, the determining the rapid inspection working condition of the new energy automobile according to the charge and discharge data of the new energy automobile includes:
determining a speed-time working condition diagram of the new energy automobile according to the charge and discharge data of the new energy automobile;
and carrying out cluster analysis on the speed-time working condition diagram of the new energy automobile to obtain the quick inspection working condition of the new energy automobile.
Further specifically, the determining the speed-time working condition diagram of the new energy automobile according to the charge and discharge data of the new energy automobile includes:
determining the output power of the new energy automobile according to the output current of the power battery of the new energy automobile and the running speed of the automobile;
setting the power change rate of the power battery;
determining a vehicle running speed and running time sequence of a power battery of the new energy battery under the harsh running environment according to the output power of the new energy vehicle;
forming a running working condition short-stroke segment according to a sequence of the running speed and the running time of the power battery of the new energy battery in the harsh running environment;
and taking the running condition short-stroke segment as a speed-time working condition diagram of the new energy automobile.
Further specifically, the performing cluster analysis on the speed-time working condition diagram of the new energy automobile to obtain the rapid inspection working condition of the new energy automobile includes:
comparing the battery output power change rate of the new energy automobile with a preset power battery power change rate;
and carrying out cluster analysis on the running condition short-stroke segments of which the battery output power change rate of the new energy automobile is greater than the preset power battery power change rate, screening and splicing to form the rapid inspection working condition of the new energy automobile.
The severe driving environment includes climbing, rapid acceleration, and using an air conditioner.
As shown in fig. 3, the rapid inspection working condition is used for simulating the running state of a vehicle on a hub test stand in a specific running scene, acquiring the output characteristics of a new energy vehicle power battery, and providing diagnostic data for judging the power health state of the new energy vehicle, and the specific construction method is as follows:
(1) screening and collecting charge and discharge data of a power battery of a detected vehicle with the average vehicle age within 1 year in the running process;
(2) calculating battery output power P as I.V, setting power battery power change rate beta, and determining a sequence of vehicle running speed U and running time t of the power battery under severe running environments (climbing, rapid acceleration and using an air conditioner) to form a running condition short-stroke segment;
(3) and carrying out cluster analysis on the U-t short-stroke segments with the output power P larger than beta, and screening and splicing to form the electric vehicle rapid inspection working condition with the total duration of 300s through the cluster analysis.
Specifically, according to the quick inspection operating mode of new energy automobile carries out simulation experiment, obtains new energy automobile's operating mode output result, include:
the rapid inspection working condition of the new energy automobile is used for the hub rotating test bed to simulate the running state of the new energy automobile in a specific running scene;
acquiring power battery output characteristics of a new energy automobile, wherein the power battery output characteristics comprise power battery output voltage data and power battery output current data;
and taking the output characteristic of the power battery as a working condition output result of the new energy automobile.
As shown in fig. 4, the vehicle-mounted data acquisition terminal is used for acquiring output characteristic parameters of a new energy automobile power battery during a test process of the new energy automobile on a hub test bench, and the main working mode is that the data acquisition terminal acquires output voltage V2, output current I2 and SOC data of the power battery during the test process through a vehicle CAN bus or a network to comprehensively judge the performance of the new energy automobile power battery and the electrical safety performance of the whole automobile.
Specifically, the power battery performance of new energy automobile is judged according to new energy automobile's operating mode output result, include:
calculating the output power of the power battery under a circulation working condition according to the output voltage data and the output current data of the power battery;
calculating the SOC conversion quantity of the power battery when one cycle working condition is finished;
calculating the health coefficient of the power battery according to the output power of the power battery and the SOC conversion quantity of the power battery;
comparing the health coefficient of the power battery with a battery health threshold;
if the health coefficient of the power battery is larger than the battery health threshold value, determining that the performance of the power battery of the new energy automobile is in a good health state;
and if the health coefficient of the power battery is not greater than the battery health threshold value, determining the performance of the power battery of the new energy automobile as that the battery needs to be replaced.
Specifically, the new energy automobile power battery performance judgment method is as follows:
1. the method for judging the decline performance of the power battery comprises the following steps: calculating the power output by the power battery under one circulation working condition
2. Calculating the SOC conversion quantity delta SOC of the power battery when one cycle working condition is finished1-SOC2(SOC1For detecting the initial power battery SOC value, SOC2And the SOC value is the SOC value after the detection of the working condition of the power battery is finished).
3. Calculating the health coefficient of the power battery
(W0The rated capacity of the new energy automobile power battery given in the new energy automobile announcement parameters).
4. Judging the health state of the power battery: when theta is more than or equal to 80 percent, the health state of the battery is good, and when theta is less than or equal to 80 percent, the battery needs to be replaced.
Specifically, the electric safety performance of whole car of new energy automobile is judged according to new energy automobile's operating mode output result, includes:
calculating the output power of the new energy automobile under a plurality of short-stroke working conditions according to the whole vehicle servicing quality and the vehicle running speed of the new energy automobile;
calculating the output power of the power battery under a circulation working condition according to the output voltage data and the output current data of the power battery;
calculating the decline state of the electric power and mechanical system of the new energy automobile according to the output power of the new energy automobile under the short-stroke working conditions and the output power of the power battery under the circulation working condition;
and comparing the decline state with an electric safety performance threshold value to obtain an electric safety performance output result of the whole vehicle.
Specifically, the whole vehicle electric safety performance method of the new energy vehicle is as follows:
1. calculating the output power of the new energy automobile under n short-stroke working conditions in the rapid detection working condition
Wherein M is the whole vehicle servicing quality given in the new energy vehicle announcement parameters, and U is the vehicle running speed.
2. Calculating the output power of the new energy automobile power battery under the condition of rapid detection
3. And calculating the degradation state eta of the electric and mechanical system of the new energy automobile as W1/(W2 epsilon) (wherein epsilon is the electromechanical transmission efficiency).
4. The whole vehicle electrical safety performance is as follows: when eta > 90% represents that the electric safety performance is good, when 80% and eta are less than 90%, the electric safety performance is general, and when eta is less than 80%, the electric safety performance of the whole vehicle is poor.
In conclusion, according to the new energy automobile operation safety performance inspection method provided by the invention, the new energy automobile operation big data in the whole life cycle of the new energy automobile are utilized, the new energy automobile operation big data under typical driving behaviors, typical road environments and typical climate environments are screened out, and inspection working conditions are formulated according to classification; the hub test bed is used for simulating a real road driving environment, the performance of the power battery of the new energy automobile is detected under the condition of no disassembly, and the detected vehicle and the power battery are not damaged; compared with the traditional battery charging and discharging detection method, the method is short in test period, more efficient and intelligent, and meets the requirement of regular inspection of the new energy automobile.
As another embodiment of the present invention, there is provided a new energy vehicle operation safety performance verification apparatus 100, wherein as shown in fig. 5, the apparatus includes:
the acquiring module 110 is configured to acquire historical operating state data of the new energy vehicle in an annual inspection period;
the screening module 120 is configured to screen the historical operating state data according to a preset screening condition to obtain charge and discharge data of the new energy vehicle;
the determining module 130 is configured to determine a fast inspection working condition of the new energy vehicle according to the charge and discharge data of the new energy vehicle;
the simulation experiment module 140 is used for performing a simulation experiment according to the rapid inspection working condition of the new energy automobile to obtain a working condition output result of the new energy automobile;
and the judging module 150 is used for judging the power battery performance and the whole vehicle electrical safety performance of the new energy vehicle according to the working condition output result of the new energy vehicle.
It should be noted that, the specific working principle of the new energy vehicle operation safety performance inspection device may refer to the description of the new energy vehicle operation safety performance inspection method in the foregoing, and details are not described herein again.
As another embodiment of the present invention, there is provided a new energy vehicle operation safety performance verification system, including: the system comprises a data acquisition device and the new energy automobile operation safety performance inspection device, wherein the data acquisition device is in communication connection with the new energy automobile operation safety performance inspection device;
the data acquisition device is used for acquiring historical running state data of the new energy automobile in an annual inspection period;
and the new energy automobile operation safety performance inspection device is used for screening and processing the historical operation state data and then judging the power battery performance and the whole automobile electrical safety performance of the new energy automobile.
As shown in fig. 2, the data acquisition device is in communication connection with a data acquisition platform, and the data acquisition platform includes a national new energy vehicle operation monitoring and management platform, a national public security traffic integrated command platform, and a national defect vehicle product recall integrated management information platform. The data acquisition device can gather new energy automobile's vehicle running state data in the annual check period for found the new energy automobile short-term test operating mode, mainly through national new energy automobile operation monitoring and management platform, national public security traffic integration command platform, national defect car product recall integrated management information platform, according to "electric automobile remote service and management system technical specification part 3: the communication protocol and data format (GB/T32960.3-2016) and the enterprise proprietary protocol collect vehicle running state data of vehicles in an annual inspection period according to vehicle brands, running weather environments, running road environments and the like, wherein the vehicle running state data comprises but is not limited to vehicle running speed, power battery output voltage and power battery output current. Specifically, reference may be made to the description of the new energy vehicle operation safety performance testing method, and details are not repeated here.
As shown in fig. 4, the new energy vehicle operation safety performance inspection system provided in the embodiment of the present invention further includes a vehicle-mounted data acquisition terminal, which is in communication connection with the new energy vehicle operation safety performance inspection device and is configured to acquire power battery output characteristics of the new energy vehicle, where the power battery output characteristics include power battery output voltage data and power battery output current data.
To sum up, the new energy automobile operation safety performance inspection system provided by the embodiment of the invention screens out the new energy automobile operation big data under typical driving behaviors, typical road environments and typical climate environments by using the operation big data in the whole life cycle of the new energy automobile, and establishes inspection working conditions according to classification; the hub test bed is used for simulating a real road driving environment, the performance of the power battery of the new energy automobile is detected under the condition of no disassembly, and the detected vehicle and the power battery are not damaged; compared with the traditional battery charging and discharging detection method, the method is short in test period, more efficient and intelligent, and meets the requirement of regular inspection of the new energy automobile.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (11)
1. A new energy automobile operation safety performance inspection method is characterized by comprising the following steps:
acquiring historical running state data of the new energy automobile in an annual inspection period;
screening the historical running state data according to preset screening conditions to obtain charge and discharge data of the new energy automobile;
determining a rapid inspection working condition of the new energy automobile according to the charge and discharge data of the new energy automobile;
performing a simulation experiment according to the rapid inspection working condition of the new energy automobile to obtain a working condition output result of the new energy automobile;
judging the power battery performance and the whole vehicle electrical safety performance of the new energy vehicle according to the working condition output result of the new energy vehicle;
according to the quick inspection operating mode of new energy automobile carries out the simulation experiment, obtains new energy automobile's operating mode output result, includes:
the rapid inspection working condition of the new energy automobile is used for the hub rotating test bed to simulate the running state of the new energy automobile in a specific running scene;
acquiring power battery output characteristics of a new energy automobile, wherein the power battery output characteristics comprise power battery output voltage data and power battery output current data;
taking the output characteristic of the power battery as a working condition output result of the new energy automobile;
the whole vehicle electrical safety performance of the new energy vehicle is judged according to the working condition output result of the new energy vehicle, and the method comprises the following steps:
calculating the output power of the new energy automobile under a plurality of short-stroke working conditions according to the whole vehicle servicing quality and the vehicle running speed of the new energy automobile;
calculating the output power of the power battery under a circulation working condition according to the output voltage data and the output current data of the power battery;
calculating the decline state of the electric power and mechanical system of the new energy automobile according to the output power of the new energy automobile under the short-stroke working conditions and the output power of the power battery under the circulation working condition;
and comparing the decline state with an electric safety performance threshold value to obtain an electric safety performance output result of the whole vehicle.
2. The method for checking the running safety performance of the new energy automobile according to claim 1, wherein the acquiring historical running state data of the new energy automobile in an annual inspection period comprises the following steps:
establishing communication connection with a data acquisition platform, wherein the data acquisition platform comprises a national new energy automobile operation monitoring and management platform, a national public security traffic integrated command platform and a national defect automobile product recall comprehensive management information platform;
historical running state data of the new energy automobile in the national new energy automobile running monitoring and management platform in an annual inspection period are obtained, wherein the historical running state data comprise vehicle running speed, power battery output voltage and power battery output current.
3. The method for inspecting the running safety performance of the new energy automobile according to claim 1, wherein the step of screening the historical running state data according to a preset screening condition to obtain the charging and discharging data of the new energy automobile comprises the following steps:
screening the historical operating state data categories according to brand categories, driving weather environments and driving road environment categories of the new energy vehicles to respectively obtain historical operating state data in the same category;
and carrying out statistical analysis on the historical running state data in the same category to obtain the charge and discharge data of the new energy automobile.
4. The method for checking the running safety performance of the new energy automobile according to claim 1, wherein the determining of the rapid checking working condition of the new energy automobile according to the charging and discharging data of the new energy automobile comprises the following steps:
determining a speed-time working condition diagram of the new energy automobile according to the charge and discharge data of the new energy automobile;
and carrying out cluster analysis on the speed-time working condition diagram of the new energy automobile to obtain the quick inspection working condition of the new energy automobile.
5. The method for checking the running safety performance of the new energy automobile according to claim 4, wherein the step of determining the speed-time working condition map of the new energy automobile according to the charging and discharging data of the new energy automobile comprises the following steps:
determining the output power of the new energy automobile according to the output current of the power battery of the new energy automobile and the running speed of the automobile;
setting the power change rate of the power battery;
determining a vehicle running speed and running time sequence of a power battery of the new energy battery under the harsh running environment according to the output power of the new energy vehicle;
forming a running working condition short-stroke segment according to a sequence of the running speed and the running time of the power battery of the new energy battery in the harsh running environment;
and taking the running condition short-stroke segment as a speed-time working condition diagram of the new energy automobile.
6. The method for inspecting the running safety performance of the new energy automobile according to claim 5, wherein the step of performing cluster analysis on the speed-time working condition diagram of the new energy automobile to obtain the rapid inspection working condition of the new energy automobile comprises the following steps:
comparing the battery output power change rate of the new energy automobile with a preset power battery power change rate;
and carrying out cluster analysis on the running condition short-stroke segments of which the battery output power change rate of the new energy automobile is greater than the preset power battery power change rate, screening and splicing to form the rapid inspection working condition of the new energy automobile.
7. The method for checking running safety of the new energy automobile according to claim 5, wherein the severe running environment comprises climbing, rapid acceleration and air conditioning.
8. The method for inspecting the running safety performance of the new energy automobile according to claim 1, wherein the step of judging the performance of the power battery of the new energy automobile according to the working condition output result of the new energy automobile comprises the following steps:
calculating the output power of the power battery under a circulation working condition according to the output voltage data and the output current data of the power battery;
calculating the SOC conversion quantity of the power battery when one cycle working condition is finished;
calculating the health coefficient of the power battery according to the output power of the power battery and the SOC conversion quantity of the power battery;
comparing the health coefficient of the power battery with a battery health threshold;
if the health coefficient of the power battery is larger than the battery health threshold value, determining that the performance of the power battery of the new energy automobile is in a good health state;
and if the health coefficient of the power battery is not greater than the battery health threshold value, determining the performance of the power battery of the new energy automobile as that the battery needs to be replaced.
9. A new energy automobile operation safety performance inspection device for realizing the new energy automobile operation safety performance inspection method of any one of claims 1 to 8, characterized by comprising:
the acquisition module is used for acquiring historical running state data of the new energy automobile in an annual inspection period;
the screening module is used for screening the historical running state data according to preset screening conditions to obtain charge and discharge data of the new energy automobile;
the determining module is used for determining the rapid inspection working condition of the new energy automobile according to the charge and discharge data of the new energy automobile;
the simulation experiment module is used for carrying out simulation experiments according to the quick test working conditions of the new energy automobile to obtain working condition output results of the new energy automobile;
and the judging module is used for judging the power battery performance and the whole vehicle electrical safety performance of the new energy vehicle according to the working condition output result of the new energy vehicle.
10. The utility model provides a new energy automobile operation safety performance test system which characterized in that includes: the new energy automobile operation safety performance inspection device comprises a data acquisition device and the new energy automobile operation safety performance inspection device of claim 9, wherein the data acquisition device is in communication connection with the new energy automobile operation safety performance inspection device;
the data acquisition device is used for acquiring historical running state data of the new energy automobile in an annual inspection period;
and the new energy automobile operation safety performance inspection device is used for screening and processing the historical operation state data and then judging the power battery performance and the whole automobile electrical safety performance of the new energy automobile.
11. The system for checking running safety of the new energy automobile according to claim 10, further comprising: and the vehicle-mounted data acquisition terminal is in communication connection with the new energy automobile operation safety performance inspection device and is used for acquiring the power battery output characteristics of the new energy automobile, and the power battery output characteristics comprise power battery output voltage data and power battery output current data.
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| CN104965180A (en) * | 2015-07-10 | 2015-10-07 | 国网冀北电力有限公司电力科学研究院 | Power battery life detection method and device |
| CN105631163A (en) * | 2016-01-30 | 2016-06-01 | 华南理工大学 | Electric vehicle power battery energy consumption hardware online simulation method and device |
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| CN104965180A (en) * | 2015-07-10 | 2015-10-07 | 国网冀北电力有限公司电力科学研究院 | Power battery life detection method and device |
| CN105631163A (en) * | 2016-01-30 | 2016-06-01 | 华南理工大学 | Electric vehicle power battery energy consumption hardware online simulation method and device |
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