CN111830415A - Fault early warning system and method for train storage battery pack - Google Patents

Fault early warning system and method for train storage battery pack Download PDF

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CN111830415A
CN111830415A CN201910313889.1A CN201910313889A CN111830415A CN 111830415 A CN111830415 A CN 111830415A CN 201910313889 A CN201910313889 A CN 201910313889A CN 111830415 A CN111830415 A CN 111830415A
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battery pack
storage battery
train
early warning
real
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CN111830415B (en
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徐勇
刘勇
戴计生
许为
张红光
江平
钟源
朱文龙
詹彦豪
唐黎哲
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Zhuzhou CRRC Times Electric Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/371Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with remote indication, e.g. on external chargers
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/392Determining battery ageing or deterioration, e.g. state of health
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4278Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a fault early warning system and a method for a train storage battery pack, wherein the system comprises the following steps: the system comprises a storage battery pack, a charger, a train control and management system, a data processing unit and a fault early warning unit. And the charger uploads the real-time state data of the storage battery pack to a train control and management system. The train control and management system sends real-time network data to the data processing unit. The data processing unit analyzes the received real-time network data and extracts the real-time state data of the storage battery pack from the received real-time network data. And the fault early warning unit analyzes the extracted real-time state data of the storage battery pack to obtain the state of the storage battery pack and output fault early warning prompt information. The method can solve the technical problems that the existing fault early warning method for the train storage battery pack has insufficient coverage, is difficult to find early fault symptoms and cannot realize early fault early warning.

Description

Fault early warning system and method for train storage battery pack
Technical Field
The invention relates to the technical field of electrical equipment fault early warning and health management, in particular to a train storage battery pack fault early warning system and method based on real-time network data, which are applied to the field of rail transit.
Background
The lead-acid/nickel-chromium storage battery pack is one of key power supply devices of a train, and has the functions of: providing a 110V direct-current voltage power supply for pantograph rising, voltage testing and illumination for the electric locomotive when the electric locomotive is started; when the 110V switching power supply is cut off due to faults in the running process of the electric locomotive, a control power supply for maintaining the running of related direct-current loads is provided; and the power supply is connected with a 110V switching power supply in parallel, and plays a role in filtering and stabilizing the control power supply when the electric locomotive runs. Therefore, the storage battery group plays an important role in the safe and reliable operation of the electric locomotive. As important parts of a train, the failure problem of the battery pack mainly includes: loss of electricity (water loss, sulfation, plate softening, grid corrosion, short circuit, thermal runaway), expansion, dielectric breakdown, and the like. The reasons for the aforementioned failures are typically: the floating charge has over-high/over-low operating voltage, over-high charging current, over-charge, deep discharge, over-high ambient temperature, over-long open circuit shelf time after the discharge of the storage battery, mixed loading of new and old batteries, design defects of the storage battery, and the like. In order to prevent the occurrence of faults such as mechanical breakdown and the like caused by the insufficient electricity of the storage battery, besides the charging strategy and the maintenance strategy of the storage battery are optimized, the health state of the storage battery can be evaluated in real time and early warning can be carried out on the failure of the storage battery in a bad state by designing an on-board storage battery online fault early warning system, so that predictive maintenance is realized.
At present, the method for early warning the faults of the storage battery pack mainly comprises two major categories of expert rules and data driving. The data driving method does not need to deeply research related professional knowledge of the storage battery, the degradation factor capable of representing the health state of the storage battery is constructed by the methods of feature selection, feature extraction and the like, and then the prediction of the evolution trend of the degradation factor is realized by adopting a data-driven fault prediction method. However, such methods require relatively comprehensive long-term state monitoring data for training of data-driven models, often require additional sensors and data analysis and storage equipment, increase investment costs, and are difficult to apply to old and running vehicle models. The expert rule method needs to analyze the relevance between the running state of the storage battery pack and each monitoring parameter, and then judges the state of the storage battery according to whether the monitoring parameter exceeds a normal range. However, the operation condition of the storage battery pack is complex in the practical application process, so that the expert rule method has the problems of insufficient coverage, difficulty in finding early fault symptoms, incapability of realizing early fault early warning and the like.
In the prior art, the following technical solutions are mainly related to the present invention:
the prior art1 is a paper "research and development of a parameter online detection system for a train vehicle-mounted storage battery pack", which is published by li ning et al in "chinese test" vol.40 No.1 in 2014 01. The test system provided by the scheme is used for monitoring, storing and replaying parameters such as temperature, voltage and current of the storage battery pack. However, in the scheme, a voltage-current transmitter and a multifunctional signal acquisition instrument need to be additionally installed, and the fault early warning of the storage battery pack cannot be realized.
The prior art2 is a paper "estimation method of residual capacity of vehicle-mounted storage battery of urban rail transit vehicle" published by "research on urban rail transit" vol.19No.12 in 2016 (12 months) by Jiangfang and Lixiaming. The scheme adopts an ampere-hour integration method as a basic calculation method for the electric quantity variation of the storage battery, comprehensively considers the initial error and the accumulated error which influence the capacity of the storage battery, takes the aging degree, the temperature variation and the discharge multiplying power as error compensation factors, and establishes a mathematical model for estimating the residual capacity of the storage battery. However, the scheme only provides a vehicle-mounted storage battery residual capacity estimation method for providing reliable storage battery capacity state information for train debugging or operation management, and does not provide a concrete implementation method for acquiring storage battery pack state parameters and performing fault early warning.
Prior art 3 is a paper "capacity accounting method for storage battery electric locomotive traction storage battery pack" published in vol.37no.5 of "electric locomotive and urban rail vehicle" by zhang tree gao, gao in 9 months 2014. The scheme analyzes factors and mechanisms influencing the capacity of the traction storage battery, considers the influence of discharge time rate and temperature on the capacity of the storage battery, and provides a process and a method for accounting the capacity of the storage battery electric locomotive. However, the scheme only provides an accounting method for selecting the capacity of the storage battery pack of the storage battery electric locomotive, and does not provide a concrete implementation method for obtaining the state parameters of the storage battery pack and early warning of faults.
Prior art 4 is a chinese invention patent "storage battery monitoring apparatus for rail train and storage battery state evaluation method" published as CN104898067A by qingdao asia tongda railway equipment limited company, and a middle electric department twenty-two institute (qingdao) sky-bo information technology company, which are applied for 16 days in 2015 at 06 months and 16 days in 2017 at 10 months and 17 days in 2017. This scheme passes through the electric current, voltage and the temperature value of detection battery that current detector, voltage detector and thermodetector can correspond, and all have many sampling line data collection that correspond to electric current, voltage and temperature value, can realize carrying out independent detection and simultaneously detecting the battery is whole to a plurality of battery cells in the battery, realizes the state of real-time supervision analysis battery. In addition, in the process of evaluating the state of the storage battery, the SOC is corrected in time, so that the calculation of the SOC value is more accurate, and the state of the storage battery is more accurately monitored and analyzed. However, this application has designed a set of independent battery monitoring devices, need install additional to the train through the transformation on, increased extra cost and monitoring devices reliability risk, difficult implementation in practical application. Meanwhile, the State Of Charge (SOC) evaluation Of the storage battery is realized by collecting the voltage, the current and the temperature Of the single storage battery and adopting a corrected ampere-hour integration method, the residual capacity Of the storage battery can only be evaluated, the health State and the degradation level in the life cycle Of the storage battery cannot be evaluated, and the fault early warning cannot be realized.
Disclosure of Invention
In view of the above, the present invention aims to provide a train storage battery pack fault early warning system and method, so as to solve the technical problems that the existing train storage battery pack fault early warning method has insufficient coverage, is difficult to find early fault symptoms, and cannot realize early fault early warning.
In order to achieve the above object, the present invention specifically provides a technical implementation scheme of a train storage battery fault early warning system and method, wherein the train storage battery fault early warning system comprises: the system comprises a storage battery pack, a charger, a train control and management system, a data processing unit and a fault early warning unit. And the charger uploads the real-time state data of the storage battery pack to a train control and management system. And the train control and management system sends the real-time network data to the data processing unit. The data processing unit analyzes the received real-time network data and extracts the real-time state data of the storage battery pack from the received real-time network data. And the fault early warning unit analyzes the extracted real-time state data of the storage battery pack to obtain the state of the storage battery pack and output fault early warning prompt information.
Further, the charger uploads the relevant real-time state information of the storage battery to a train control and management system through a train bus. And the data processing unit receives and stores real-time network data in the train control and management system through a train bus.
Furthermore, the data processing unit analyzes the received real-time network data according to a data communication protocol, and extracts the real-time state data of the storage battery pack from the received real-time network data.
Further, the real-time network data includes but is not limited to: train operation information, whole-train equipment state information and whole-train real-time fault information.
Further, the battery pack real-time status data includes but is not limited to: the device comprises an environment temperature, a storage battery pack voltage, a storage battery pack charging current, a charger output current, a charger charging overcurrent flag bit and a charger output overcurrent flag bit.
Further, the charger acquires the voltage, the charging current and the temperature information of the storage battery through a voltage sensor, a current sensor and a temperature sensor respectively, combines the output current, the charging overcurrent flag bit and the output overcurrent flag bit of the charger, and uploads the output overcurrent flag bit to a train control and management system through a train bus. The train control and management system packs real-time network data including train operation information, whole-train equipment state information and whole-train real-time fault information according to a set message format and then transmits the real-time network data to the data processing unit through a train bus.
Further, after receiving the real-time network data transmitted by the train control and management system, the data processing unit stores the real-time network data, formats the real-time network data by adopting a message format of train-ground communication, and waits for wireless transmission according to a train-ground communication protocol. The data processing unit analyzes the real-time network data according to a set message format, reads and caches the vehicle number, time and environment temperature data, the voltage, charging current and temperature data of the storage battery pack, the output current, charging overcurrent flag bit and output overcurrent flag bit data of the charger, and transmits the analyzed data to the fault early warning unit in a specified format according to requirements.
Further, the fault early warning unit analyzes the extracted real-time state data of the storage battery pack by using an expert rule. And after the analyzed real-time state data of the storage battery pack is transmitted to the fault early warning unit, the storage battery pack enters different storage battery pack early warning item points according to requirements, the deviation degree between the real-time state data and the normal state data of the storage battery pack is evaluated through a coded expert rule, and if the deviation degree exceeds a preset threshold value obtained through statistical analysis, fault early warning information is sent out.
Further, the system further comprises a wireless transmission module and a ground server, and the data processing unit, the fault early warning unit and the wireless transmission module are based on a vehicle-mounted cloud platform. The wireless transmission module and the ground server perform wireless data transmission through a vehicle-ground communication protocol, and the wireless transmission module is respectively communicated with the data processing unit, the fault early warning unit and the ground server. And the storage battery state data and the fault early warning information are respectively transmitted to the wireless transmission module from the data processing unit and the fault early warning unit and then transmitted to the ground server by the wireless transmission module. The system also comprises a train display device, the wireless transmission module receives the information transmitted by the ground server, and the train display device interacts with the train control and management system to guide drivers and passengers to take corresponding fault handling measures.
Furthermore, real-time network data including real-time state data of the storage battery pack is stored in the data processing unit, and the real-time network data is transmitted to the ground server through the wireless transmission module in a WLAN (wireless local area network) mode after the train enters or returns to the depot. And the wireless transmission module transmits the data request instruction sent by the ground server to the data processing unit.
Further, if the real-time state data of the storage battery pack is judged by expert rules and then sends out fault early warning information, the fault early warning unit sends the fault early warning information to the wireless transmission module, and the wireless transmission module transmits the fault early warning information to the ground server in real time in a mode including GSM-R or LTE-R, so that the ground server analyzes reasons and generates fault handling measures.
Further, the ground server information received by the wireless communication module includes, but is not limited to: and checking whether the connection is interrupted by heartbeat data packets, wireless transmission performance configuration instructions and storage battery pack fault handling instructions.
Further, the fault early warning unit judges whether the storage battery pack is charged overtime by constant current according to time, train number, storage battery pack charging voltage and storage battery pack charging current. And if the constant-current charging duration time exceeds a set threshold value, transmitting the constant-current charging overtime information of the storage battery pack to the train display device and simultaneously transmitting the constant-current charging overtime information to the ground server so as to prompt a maintainer to return to a warehouse to check whether the current sensor is normal or not and whether the storage battery pack is normal or not.
Further, when the system comprises two storage battery packs, namely a first storage battery pack and a second storage battery pack, the fault early warning unit judges whether the temperature signals of the storage battery packs are abnormal or not according to time, train number, environment temperature, temperature of the first storage battery pack and temperature of the second storage battery pack, and judges by comparing temperature deviation between the first storage battery pack and the second storage battery pack which are in the same working condition on the same train. And if the temperature deviation between the first storage battery pack and the second storage battery pack exceeds a set threshold value, transmitting the abnormal temperature signal information of the storage battery packs to a train display device and simultaneously transmitting the abnormal temperature signal information to a ground server so as to prompt a maintainer to return to a warehouse to check whether the temperature sensor is normal or not and whether the storage battery packs are normal or not.
Further, the fault early warning unit judges whether the fixed load of the storage battery pack is short-circuited or not according to time, the train number, the output current of the charger, the charging overcurrent flag bit of the charger, the voltage of the storage battery pack and the charging current of the storage battery pack, analyzes received real-time state data of the storage battery pack, and transmits short-circuit information of the fixed load of the storage battery pack to a train display device and simultaneously transmits the short-circuit information to a ground server to prompt a maintainer to return to a warehouse to check whether a voltage sensor is normal, whether a current sensor is normal and whether the storage battery pack is normal or not if the charging battery pack is in a current limiting output or overcurrent protection working condition and.
Further, the fault early warning unit judges whether the capacity of the storage battery pack is degraded or not according to the time, the train number, the charging voltage of the storage battery pack, the charging current of the storage battery pack and the temperature of the storage battery pack, and analyzes the received real-time state data of the storage battery pack. And if the electric quantity acquired by the storage battery pack in the constant-voltage charging continuous stage is less than a set threshold value, transmitting the capacity degradation information of the storage battery pack to a train display device and simultaneously transmitting the capacity degradation information to a ground server to prompt a maintainer to return to a warehouse to check whether the storage battery pack is normal or not.
The invention also provides a technical implementation scheme of the fault early warning method for the train storage battery pack, and the fault early warning method for the train storage battery pack comprises the following steps:
s101) the charger uploads the real-time state data of the storage battery pack to a train control and management system, and the vehicle-mounted cloud platform acquires and stores real-time network data in the train control and management system;
s102) the vehicle-mounted cloud platform analyzes the received real-time network data and extracts storage battery pack real-time state data from the received real-time network data;
s103) the vehicle-mounted cloud platform analyzes the extracted real-time state data of the storage battery pack to obtain the state of the storage battery pack and perform fault early warning prompt.
Further, the vehicle-mounted cloud platform includes a data processing unit, and the step S101) further includes:
the charging machine acquires voltage, charging current and temperature information of the storage battery pack through a voltage sensor, a current sensor and a temperature sensor respectively, combines the output current, the charging overcurrent zone bit and the output overcurrent zone bit of the charging machine, and uploads the output overcurrent zone bit to a train control and management system through a train bus. The train control and management system packs real-time network data including train operation information, whole-train equipment state information and whole-train real-time fault information according to a set message format and then transmits the real-time network data to the data processing unit through a train bus.
Further, the vehicle-mounted cloud platform further includes a fault early warning unit, and the step S102) further includes:
and after receiving the real-time network data transmitted by the train control and management system, the data processing unit stores the real-time network data, formats the real-time network data by adopting a message format of train-ground communication, and waits for wireless transmission according to a train-ground communication protocol. The data processing unit analyzes the real-time network data according to a set message format, reads and caches the vehicle number, time and environment temperature data, the voltage, charging current and temperature data of the storage battery pack, the output current, charging overcurrent flag bit and output overcurrent flag bit data of the charger, and transmits the analyzed data to the fault early warning unit in a specified format according to requirements.
Further, the step S103) further includes:
and after the analyzed real-time state data of the storage battery pack is transmitted to the fault early warning unit, the storage battery pack enters different storage battery pack early warning item points according to requirements, the deviation degree between the real-time state data and the normal state data of the storage battery pack is evaluated through a coded expert rule, and if the deviation degree exceeds a preset threshold value obtained through statistical analysis, fault early warning information is sent out.
Further, the vehicle-mounted cloud platform further comprises a wireless transmission module, and the method further comprises:
s104) the wireless transmission module carries out wireless data transmission with a ground server through a vehicle-ground communication protocol, and the wireless transmission module is respectively communicated with the data processing unit, the fault early warning unit and the ground server. And the storage battery state data and the fault early warning information are respectively transmitted to the wireless transmission module from the data processing unit and the fault early warning unit and then transmitted to the ground server by the wireless transmission module. The system also comprises a train display device, the wireless transmission module receives the information transmitted by the ground server, and the train display device interacts with the train control and management system to guide drivers and passengers to take corresponding fault handling measures.
Further, the step S104) further includes:
real-time network data including real-time state data of the storage battery pack are stored in the data processing unit, and the real-time network data are transmitted to the ground server through the wireless transmission module in a WLAN (wireless local area network) mode after a train enters a station or returns to the base. And the wireless transmission module transmits the data request instruction sent by the ground server to the data processing unit.
Further, the step S104) further includes:
if the real-time state data of the storage battery pack sends out fault early warning information after being judged by expert rules, the fault early warning unit sends the fault early warning information to the wireless transmission module, and the wireless transmission module transmits the fault early warning information to the ground server in real time in a mode including GSM-R or LTE-R, so that the ground server analyzes reasons and generates fault handling measures.
Further, the ground server information received by the wireless communication module includes, but is not limited to: and checking whether the connection is interrupted by heartbeat data packets, wireless transmission performance configuration instructions and storage battery pack fault handling instructions.
Further, when the system comprises two storage battery packs, namely a first storage battery pack and a second storage battery pack, if the fault early warning unit judges that the three conditions of no fault of the charger, no fault of the storage battery packs and the storage battery packs in a constant-current charging working condition are met simultaneously, calculation and processing are carried out according to the following steps so as to realize fault early warning:
s11) collecting the voltage of the first storage battery pack as the initial voltage U1i of the first storage battery pack and the voltage of the second storage battery pack as the initial voltage U2i of the second storage battery pack when the charger is in a standby working condition;
s12) dividing the initial voltage of the first storage battery pack and the second storage battery pack into three intervals of [ U11, U12 ], [ U12, U13 ], [ U13 and U1m ], wherein U1m is the voltage charged by a charger to the storage battery packs; when the actual initial voltage of the storage battery pack is in the three intervals, the corresponding charging overtime thresholds are respectively T11, T12 and T13;
s13), calculating the actual constant current charging time T1i of the first storage battery pack, and if U1i belongs to [ U11, U12) and T1i is greater than T11, or U1i belongs to [ U12, U13) and T1i is greater than T12, or U1i belongs to [ U13, U1m ] and T1i is greater than T12, the fault early warning unit sends charging overtime fault early warning information of the first storage battery pack (E1) to a train display device and a ground server. And calculating the actual constant current charging time T2i of the second storage battery pack, and if U2i belongs to [ U11, U12 ] and T2i is greater than T11, or U2i belongs to [ U12, U13) and T2i is greater than T12, or U2i belongs to [ U13, U1m ] and T2i is greater than T12, sending the charging overtime fault early warning information of the second storage battery pack to the fault early warning unit, the train display device and the ground server.
Further, when the system includes two storage battery packs, which are respectively a first storage battery pack and a second storage battery pack, if the fault early warning unit determines that the charger is out of fault and the storage battery packs are out of fault, the fault early warning system performs calculation and processing according to the following steps to realize fault early warning:
s21) calculating the difference between the temperature Tbat1 of the first battery pack and the temperature Tbat2 of the second battery pack as Tdiff, the duration as Ttime, the temperature deviation early warning threshold as Ttemp, and the duration threshold as Ttmax;
s22) if the difference Tdiff is larger than Ttemp and the duration Ttime is larger than Ttmax, the failure early warning unit reports the abnormal failure early warning information of the temperature signal of the storage battery pack to the train display device and the ground server;
s23) if the temperature Tbat1 of the first battery pack is lower than the ambient temperature Tenv and exceeds the set threshold on the premise that the battery pack temperature signal is abnormal, the failure warning unit transmits the abnormality of the temperature sensor of the first battery pack to the train display device and the ground server. If the temperature Tbat2 of the second battery pack is lower than the ambient temperature Tenv and exceeds a set threshold, the failure warning unit transmits that the temperature sensor of the second battery pack is abnormal to the train display device and the ground server.
Further, when the system comprises two storage battery packs, namely a first storage battery pack and a second storage battery pack, if the fault early warning unit judges that any one of the three conditions of current-limiting output of the charger, output overcurrent of the charger and charging overcurrent of the charger is met,
then the calculation and processing are carried out according to the following steps to realize the fault early warning:
s31) if the charging current of the first storage battery pack is larger than 0, calculating the actual descending speed of the voltage U1bat of the first storage battery pack to be V1bat V/min; if the charging current of the second storage battery pack is larger than 0, calculating the actual descending speed of the voltage U2bat of the second storage battery pack to be V2bat V/min; setting an early warning threshold value of the voltage reduction rate of the storage battery as Vmax V/min;
s32) if the voltage drop rate V1bat of the first storage battery pack is larger than Vmax, the fault early warning unit sends short circuit fault early warning information of the first storage battery pack fixed load to a train display device and a ground server; and if the voltage drop rate V2bat of the second storage battery pack is greater than Vmax, the fault early warning unit sends short circuit fault early warning information of the fixed load of the second storage battery pack to a train display device and a ground server.
Further, when the system comprises two storage battery packs, namely a first storage battery pack and a second storage battery pack, if the fault early warning unit judges that the three conditions of no fault of the charger, no fault of the storage battery packs and the storage battery packs in a constant voltage charging working condition are met simultaneously, calculation and processing are carried out according to the following steps so as to realize fault early warning:
s41) in the constant voltage charging stage, the charging current of the first storage battery pack is Icv1, the charging current of the second storage battery pack is Icv2, the constant voltage charging starting time of the first storage battery pack is Tstart1, the ending time of the first storage battery pack is Tend1, the constant voltage charging starting time of the second storage battery pack is Tstart2, and the ending time of the second storage battery pack is Tend 2;
s42) dividing the average temperature of the first battery pack and the second battery pack in the constant voltage charging continuous stage into three intervals of [ Tbat11, Tbat12 ], [ Tbat12, Tbat13 ], [ Tbat13, Tbat1m ], wherein Tbat1m is the corresponding temperature alarm threshold of the battery pack; when the actual temperature of the storage battery pack is in the three intervals, the corresponding charging electric quantity thresholds are Q11, Q12 and Q13 respectively;
s43) calculating the whole constant voltage charging duration periodAverage temperature T1bat _ ave and charge capacity of first battery pack
Figure RE-GDA0002155971730000081
If T1bat _ ave e [ Tbat11, Tbat12) and Q1<Q11, or T1bat _ ave e [ Tbat12, Tbat13) and Q1<Q12, or T1bat _ ave e [ Tbat13, Tbat1m]And Q1<Q13, the fault early warning unit sends first storage battery capacity degradation fault early warning information to a train display device and a ground server; calculating the average temperature T2bat _ ave and the charge capacity of the second storage battery pack in the whole constant voltage charge continuous stage
Figure RE-GDA0002155971730000082
If T2bat _ ave e [ Tbat11, Tbat12) and Q2<Q11, or T2bat _ ave e [ Tbat12, Tbat13) and Q2<Q12, or T2bat _ ave e [ Tbat13, Tbat1m]And Q2<And Q13, the fault early warning unit sends the capacity degradation fault early warning information of the second storage battery pack to a train display device and a ground server.
By implementing the technical scheme of the train storage battery pack fault early warning system and the train storage battery pack fault early warning method provided by the invention, the following beneficial effects are achieved:
(1) according to the train storage battery pack fault early warning system and method, the fault early warning of the train storage battery pack is realized under the condition that a sensor and other equipment are not additionally arranged, the relevant state parameters of the storage battery in the existing network data of the train are processed and analyzed by constructing the data processing unit and the fault early warning unit, the real-time fault early warning function of the storage battery pack is realized by only utilizing the existing real-time network data, any sensor is not required to be additionally arranged, and the original equipment is not required to be changed;
(2) the invention discloses a fault early warning system and a fault early warning method for a train storage battery pack based on expert rules, which can complete the early warning of various faults of overtime constant-current charging, abnormal temperature signals, short circuit of a fixed load and capacity degradation of the storage battery pack by evaluating the deviation degree of real-time state data and normal state data of the storage battery pack, can realize the predictive maintenance of the storage battery pack, and greatly improve the safety of train operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, from which other embodiments can be derived by a person skilled in the art without inventive effort.
FIG. 1 is a schematic diagram of a configuration of a battery pack on a train in an embodiment of the train battery pack fault warning system of the present invention;
FIG. 2 is a schematic diagram of an electrical connection topology of a battery charging circuit in an embodiment of the train battery fault warning system of the present invention;
FIG. 3 is a block diagram of a system configuration of an embodiment of the train battery pack fault warning system of the present invention;
FIG. 4 is a schematic diagram of a battery status data acquisition circuit in an embodiment of the train battery fault warning system of the present invention;
FIG. 5 is a flowchart of a main routine of a train storage battery pack fault warning method according to an embodiment of the present invention;
FIG. 6 is a flowchart of a detailed procedure of one embodiment of the train storage battery pack fault warning method of the present invention;
in the figure: the method comprises the following steps of 1-a train real-time network data transmission module, 2-a vehicle-mounted cloud platform, 3-a ground server, 10-a storage battery pack, 11-a charger, 12-TCMS, 13-a train display device, 14-a voltage sensor, 15-a current sensor, 16-a temperature sensor, 21-a data processing unit, 22-a fault early warning unit, 23-a wireless transmission module and 100-a train.
Detailed Description
For reference and clarity, the terms, abbreviations or abbreviations used hereinafter are as follows:
TCMS: train Control and Management System, short for Train Control and Management System;
an OCS: an on board Cloud System, short for an on-board Cloud platform;
MVB: multifunction Vehicle Bus, short for Multifunction Vehicle Bus;
CAN: controller Area Network, short for Controller Area Network;
GSM-R: global System for Mobile Communications-Railway, an international wireless communication standard for Railway communication and applications;
LTE-R: long Term Evolution for Railway, a general mobile communication technology applied to the Railway field;
WLAN: wireless Local Area Networks, short for Wireless Local Area Networks.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all 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.
Fig. 1 to fig. 6 show specific embodiments of a train storage battery pack fault early warning system and method according to the present invention, and the present invention is further described below with reference to the drawings and the specific embodiments.
As shown in fig. 1 and 2, each train 100 is a 6-car unit consist, where Tc represents a trailer with cab, Mp represents a railcar with pantograph, and M represents a railcar without pantograph. Two vehicles at the head and the tail are provided with 1 charger (a first charger C1 and a second charger C2 respectively), and each train is provided with two chargers. The load of the charger 11 is the load (i.e. L1-L6 shown in figure 2) for controlling power supply, lighting and the like and the battery pack 10, and two vehicles at the head and the tail are respectively provided with one battery pack 10 of DC 110V. More than three storage battery packs 10 can be arranged on each train according to the specific type of the train.
The total output power capacity of each charger 11 is 30KW, and the maximum total power provided by the two chargers 11 to the train 100 is 60 KW. In normal operation (i.e., 2 chargers 11 supplying power), they together supply power to the loads L1-L6 of six consist trains. At the same time, the charger 11 charges the battery pack 10 of the vehicle. If one charger 11 fails, the output of this charger 11 is blocked, and the chargers 11 of other vehicles can supply power to the basic load of the failed vehicle through the DC110V main line, and since the DC110V storage battery 10 of the vehicle is connected with the main line through an isolation diode (such as D1 or D2 shown in FIG. 2), the DC110V power of other vehicles cannot charge the DC110V storage battery 10 of the vehicle.
The train communication network of the chargers 11 is composed of two MVB communication modules, each charger 11 is assigned one MVB communication module, and each vehicle is assigned one MVB communication module for communication of the chargers 11, display data, fault information display, and the like. The following embodiments 1 and 2 provide a system and a method for implementing a battery fault early warning by using the existing real-time train network data without installing a sensor, and if the battery state index has a large deviation and a long duration, the battery fault early warning is performed.
Example 1
As shown in fig. 3, an embodiment of the train storage battery pack fault early warning system of the present invention specifically includes: the train real-time network data transmission system comprises a train real-time network data transmission module 1 and a vehicle-mounted cloud platform 2. The train real-time network data transmission module 1 further comprises a storage battery pack 10 and a charger 11, and the vehicle-mounted cloud platform 2 further comprises a train control and management system 12, a data processing unit 21 and a fault early warning unit 22. The charger 11 uploads the real-time state data of the storage battery pack to the train control and management system 12. The train control and management system 12 sends real-time network data to the data processing unit 21. The data processing unit 21 analyzes the received real-time network data and extracts the storage battery pack real-time state data from the received real-time network data. The fault early warning unit 22 analyzes the extracted real-time state data of the storage battery pack to obtain the state of the storage battery pack 10 and outputs fault early warning prompt information. Therefore, the specific embodiment of the invention provides a system and a method for performing fault early warning on a storage battery by using the existing real-time network data of a train under the condition that a sensor is not additionally arranged, and if the state index deviation of the storage battery is large and the duration is long, the fault early warning is performed.
The train storage battery pack fault early warning system further comprises a wireless transmission module 23 and a ground server 3, and the data processing unit 21, the fault early warning unit 22 and the wireless transmission module 23 are based on a vehicle-mounted cloud platform (OCS) 2. The wireless transmission module 23 and the ground server 3 perform wireless data transmission through a vehicle-ground communication protocol, and the wireless transmission module 23 communicates with the data processing unit 21, the fault early warning unit 22 and the ground server 3 respectively. The real-time state data and the fault early warning information of the storage battery are respectively transmitted to the wireless transmission module 23 from the data processing unit 21 and the fault early warning unit 22, and then transmitted to the ground server 3 by the wireless transmission module 23. The train storage battery pack fault early warning system further comprises a train display device 13, the wireless transmission module 23 receives information transmitted by the ground server 3, and the information is interacted with the train display device 13 through the train control and management system 12 to guide drivers and passengers to take corresponding fault handling measures.
The charger 11 uploads the real-time state data of the storage battery to the train control and management system 12 through a train bus (such as MVB, CAN or Ethernet). The data processing unit 21 receives and stores real-time network data in the train control and management system 12 through a train bus (e.g., MVB or ethernet, etc.). Real-time network data includes, but is not limited to: the system comprises train running information, full-train equipment state information and full-train real-time fault information, wherein the full-train equipment state information comprises storage battery pack related state data.
The data processing unit 21 analyzes the received real-time network data according to a data communication protocol, and extracts storage battery pack real-time state data from the received real-time network data. Battery pack real time status data includes, but is not limited to: the device comprises an environment temperature, a storage battery pack voltage, a storage battery pack charging current, a charger output current, a charger charging overcurrent flag bit and a charger output overcurrent flag bit.
As shown in fig. 4, the charger 11 acquires the voltage, the charging current and the temperature information of the storage battery 10 through the existing voltage sensor 14, the current sensor 15 and the temperature sensor 16, combines the output current, the charging overcurrent flag bit and the output overcurrent flag bit of the charger 11, and uploads the output overcurrent flag bit to the train control and management system 12 through the train bus. The train control and management system 12 packages real-time network data including train operation information, full-train device status information (including storage battery pack real-time status data) and full-train real-time fault information according to a set message format, and then transmits the packaged real-time network data to the data processing unit 21 through a train bus.
After receiving the real-time network data transmitted by the train control and management system 12, the data processing unit 21 stores the real-time network data, formats the real-time network data in a message format of train-ground communication, and waits for wireless transmission according to a train-ground communication protocol. The data processing unit 21 analyzes the real-time network data according to a set message format, reads and caches the car number, time, and ambient temperature data, the voltage, charging current, and temperature data of the storage battery 10, and the output current, charging overcurrent flag bit, and output overcurrent flag bit data of the charger 11, and transmits the analyzed data to the fault early warning unit 22 in a specified format as required.
The fault pre-warning unit 22 analyzes the extracted real-time status data of the battery pack using expert rules. The analyzed real-time state data of the storage battery pack are transmitted to the fault early warning unit 22, then the storage battery pack enters different storage battery pack fault early warning item points according to requirements, deviation degree between the real-time state data and normal state data of the storage battery pack is evaluated through coded expert rules, and if the deviation degree exceeds a preset threshold value obtained through statistical analysis, fault early warning information is sent out.
Communicating with the data processing unit 21: the data processing unit 21 stores real-time network data including real-time status data of the storage battery pack, and the real-time network data is transmitted to the ground server 3 through the wireless transmission module 23 in a WLAN mode after the train enters or returns to the depot due to large data volume and no real-time transmission requirement. In addition, the wireless transmission module 23 may transmit a data request command sent by the ground server 3 to the data processing unit 21.
Communicating with the fault pre-warning unit 22: if the real-time state data of the storage battery pack is judged by the expert rules and then sends out fault early warning information, the fault early warning unit 22 sends the fault early warning information to the wireless transmission module 23, and then the wireless transmission module 23 transmits the fault early warning information to the ground server 3 in real time in a mode including GSM-R or LTE-R, so that the ground server 3 can analyze reasons and generate fault treatment measures.
Communicating with the ground server 3: and different communication modes are adopted according to different data types, and if the data is train network data, the data is transmitted to a ground server by adopting a WLAN (wireless local area network) after the train enters a station or returns to a base. If the data is storage battery failure early warning information, the data is transmitted to the ground server 3 in real time in a GSM-R or LTE-R mode and the like. The terrestrial server information received by the wireless communication module 23 includes, but is not limited to: and checking whether the connection is interrupted by heartbeat data packets, wireless transmission performance configuration instructions and storage battery pack fault handling instructions.
The fault early warning unit 22 judges whether the storage battery pack 10 is charged overtime by the constant current according to the time, the train number, the charging voltage of the storage battery pack and the charging current of the storage battery pack. If the constant-current charging duration time exceeds a set threshold value, the constant-current charging overtime information of the storage battery pack is transmitted to a train display device 13 and is simultaneously transmitted to a ground server 3, so that a maintainer is prompted to return to a warehouse to check whether a current sensor 15 is normal or not and whether the storage battery pack 10 is normal or not.
When the train battery pack fault early warning system includes two battery packs 10, which are a first battery pack E1 and a second battery pack E2, respectively, the fault early warning unit 22 determines whether the battery pack temperature signal is abnormal according to time, train number, ambient temperature, first battery pack temperature, and second battery pack temperature, and determines by comparing the temperature deviation between the first battery pack E1 and the second battery pack E2 which are in the same working condition on the same train. If the temperature deviation between the first battery pack E1 and the second battery pack E2 exceeds a set threshold, the abnormal information of the temperature signals of the battery packs is transmitted to the train display device 13 and is simultaneously transmitted to the ground server 3, so that a maintainer is prompted to return to a warehouse to check whether the temperature sensor 16 is normal or not and whether the battery pack 10 is normal or not.
The fault early warning unit 22 judges whether the fixed load of the storage battery pack is short-circuited according to the time, the train number, the output current of the charger, the charging overcurrent flag bit of the charger, the output overcurrent flag bit of the charger, the voltage of the storage battery pack and the charging current of the storage battery pack, and analyzes the received real-time state data of the storage battery pack. If the charger 11 is in a current-limiting output or overcurrent protection working condition and the voltage of the storage battery pack drops at a rate exceeding a set threshold value in a short time, transmitting the short-circuit information of the fixed load of the storage battery pack to the train display device 13 and simultaneously transmitting the short-circuit information to the ground server 3 so as to prompt a maintainer to return to a warehouse to check whether the voltage sensor 14 is normal, whether the current sensor 15 is normal and whether the storage battery pack 10 is normal.
The fault early warning unit 22 judges whether the capacity of the storage battery pack is degraded or not according to the time, the train number, the charging voltage of the storage battery pack, the charging current of the storage battery pack and the temperature of the storage battery pack, and analyzes the received real-time state data of the storage battery pack. If the time when the constant-current charging of the storage battery pack is converted into the constant-voltage charging is set as an initial time and the time when the constant-voltage charging of the storage battery pack is converted into the floating charging is set as a termination time, and if the electric quantity acquired by the storage battery pack 10 is less than a set threshold value in a constant-voltage charging continuous stage, the capacity degradation information of the storage battery pack is transmitted to a train display device 13 and is simultaneously transmitted to a ground server 3 so as to prompt a maintainer to check whether the storage battery pack 10 is normal or.
The embodiment 1 provides an electric locomotive storage battery pack fault early warning System based on vehicle-mounted real-time network data, which can be applied to a train 100 equipped with a vehicle-mounted Cloud platform (OCS) to solve the technical problem that storage battery pack fault early warning is only performed by using the existing real-time network data on the premise that no sensor is additionally arranged and no additional equipment transformation is performed on the train, and the problem of predictive maintenance of the storage battery pack is solved.
Example 2
As shown in fig. 5 and fig. 6, an embodiment of the train storage battery pack fault early warning method of the invention specifically includes the following steps:
s101) train real-time network data transmission: the charger 11 uploads the real-time state data of the storage battery pack to the train control and management system 12, and the vehicle-mounted cloud platform 2 acquires and stores the real-time network data in the train control and management system 12;
s102) train real-time network data processing step: the vehicle-mounted cloud platform 2 analyzes the received real-time network data and extracts storage battery pack real-time state data from the received real-time network data;
s103) train storage battery pack fault early warning step: and the vehicle-mounted cloud platform 2 analyzes the extracted real-time state data of the storage battery pack to obtain the state of the storage battery pack 10 and carries out fault early warning prompt.
The vehicle-mounted cloud platform 2 includes a data processing unit 21, and the step S101) further includes:
the charger 11 acquires the voltage, charging current and temperature information of the storage battery 10 through the existing voltage sensor 14, current sensor 15 and temperature sensor 16, combines the output current, charging overcurrent flag bit and output overcurrent flag bit of the charger 11, and uploads the information to the train control and management system 12 through train buses such as MVB/CAN/ethernet. The train control and management system 12 packages real-time network data including train operation information, full-train device status information (including storage battery pack real-time status data) and full-train real-time fault information according to a set message format, and then transmits the packaged real-time network data to the data processing unit 21 through train buses such as MVB/ethernet.
The vehicle-mounted cloud platform 2 further includes a fault early warning unit 22, and step S102) further includes:
after the vehicle-mounted cloud platform 2 receives the real-time network data transmitted by the train control and management system 12, on one hand, the data processing unit 21 of the vehicle-mounted cloud platform 2 stores the real-time network data, formats the real-time network data by using a message format of train-ground communication, and waits for wireless transmission according to a train-ground communication protocol. On the other hand, the data processing unit 21 analyzes the real-time network data according to a set message format, reads and caches the vehicle number, time, and ambient temperature data, the voltage, charging current, and temperature data of the storage battery pack 10, and the output current, charging overcurrent flag bit, and output overcurrent flag bit data of the charger 11, and transmits the analyzed data to the fault early warning unit 22 in a specified format as required.
Step S103) further includes:
the fault early warning unit 22 in the vehicle-mounted cloud platform 2 is a carrier for realizing a storage battery pack fault early warning function, analyzed storage battery pack real-time state data are transmitted to the fault early warning unit 22 and then respectively enter different storage battery pack fault early warning item points according to requirements, a coded expert rule is used for evaluating the deviation degree between the storage battery pack real-time state data and normal state data, and if the deviation degree exceeds a preset threshold value obtained through statistical analysis, fault early warning information is sent out.
The train storage battery pack fault early warning system further comprises a train display device 13, the vehicle-mounted cloud platform 2 further comprises a wireless transmission module 23, and the train storage battery pack fault early warning method further comprises the following steps:
s104) vehicle-ground wireless data transmission step: the wireless transmission module 23 performs wireless data transmission with the ground server 3 through a vehicle-ground communication protocol, and the transmission modes include, but are not limited to, GSM-R, LTE-R, WLAN, and the like. The wireless transmission module 23 communicates with the data processing unit 21, the failure early warning unit 22 and the ground server 3, respectively. The working process comprises the following steps: the real-time state data and the fault early warning information of the storage battery pack are respectively transmitted to the wireless transmission module 23 from the data processing unit 21 and the fault early warning unit 22, and then transmitted to the ground server 3 by the wireless transmission module 23. On the other hand: the wireless transmission module 23 receives the information transmitted by the ground server 3, and interacts with the train display device 13 through the train control and management system 12 to guide drivers and passengers to take corresponding fault handling measures.
Step S104) further includes:
the data processing unit 21 stores real-time network data including real-time status data of the storage battery pack, and the real-time network data is transmitted to the ground server 3 through the wireless transmission module 23 in a WLAN mode after the train enters or returns to the depot due to large data volume and no real-time transmission requirement. In addition, the wireless transmission module 23 may transmit a data request command sent by the ground server 3 to the data processing unit 21.
Step S104) further includes:
if the real-time state data of the storage battery pack is judged by the expert rules and then sends out fault early warning information, the fault early warning unit 22 sends the fault early warning information to the wireless transmission module 23, and then the wireless transmission module 23 transmits the fault early warning information to the ground server 3 in real time in a mode including GSM-R or LTE-R, so that the ground server 3 can analyze reasons and generate fault treatment measures.
The information of the ground server 3 received by the wireless communication module 23 includes but is not limited to: and checking whether the connection is interrupted by heartbeat data packets, wireless transmission performance configuration instructions and storage battery pack fault handling instructions.
The fault early warning module 22 in the vehicle-mounted cloud platform 2 receives the real-time state data of the storage battery pack, and estimates the degree of deviation from the normal state by using different expert rules according to different fault early warning item requirements. The fault early warning expert rules provided by the embodiment include storage battery pack constant current charging overtime, storage battery pack temperature signal abnormality, storage battery pack fixed load short circuit and storage battery pack capacity degradation, and the scheme will be explained in detail by taking an example that each train 100 includes two storage battery packs 10. However, it should be noted that in the embodiment of the present invention, three or more battery packs 10 may be arranged per train according to the type of the train, and in this case, similar calculation of the related data may be performed for each battery pack 10.
1) Storage battery pack constant-current charging overtime fault early warning
In the present embodiment, the train battery pack fault warning system includes two battery packs 10, which are a first battery pack E1 and a second battery pack E2. Whether the battery pack 10 is in constant current charge over time can be analyzed by analyzing the received real-time status data of the battery pack, and the associated real-time (operating) status data of the battery pack is shown in table 1 below. If the constant current charging lasts for a long time and exceeds a set threshold (different thresholds are set according to the initial voltage of the storage battery), the constant current charging overtime information of the storage battery is transmitted to a train display device 13 and simultaneously transmitted to the ground server 3, and a maintainer is reminded to return to a warehouse to check whether a current sensor 15 of the storage battery 10 is normal or not and whether the storage battery 10 is normal or not.
TABLE 1 storage battery pack constant-current charging overtime associated data information
Figure RE-GDA0002155971730000151
Constraint 1: the charger 11 has no fault;
constraint 2: the battery pack 10 is failure-free;
constraint 3: the battery pack 10 is in a constant current charging condition.
If the fault early warning unit 22 determines that the three constraint conditions are simultaneously satisfied, the calculation and processing of the associated data are performed according to the following steps to implement fault early warning:
s11) collecting the voltage of the first storage battery pack E1 as the initial voltage U1i of the first storage battery pack E1 and the voltage of the second storage battery pack E2 as the initial voltage U2i of the second storage battery pack E2 when the charger 11 is in a standby working condition;
s12) dividing the initial voltage of the first battery pack E1 and the second battery pack E2 into three sections [ U11, U12 ], [ U12, U13 ], [ U13, U1m ], wherein U1m is the voltage charged by the charger 11 to the battery pack 10; when the actual initial voltage of the secondary battery pack 10 is in these three intervals, the corresponding charging timeout thresholds are T11, T12, and T13, respectively;
the interval division of the initial voltage can be combined with actual collected data, and is determined specifically after statistical analysis, wherein the more the interval division, the better, but the more the interval division, the more false alarm is easy to occur. As a preferred embodiment of the present invention, the initial voltage can be divided into three intervals, namely: the interval between the lowest voltage U11 (voltage alarm value) of the storage battery and the constant voltage charging voltage U1m is divided into three sections, the first section is a voltage rapid rising stage, the second section is a voltage gradual rising stage, and the third section is a near constant voltage stage, so that the charging curve of the storage battery can be simulated as accurately as possible by the division, meanwhile, the interval division is not too much, and the three intervals are reasonably divided.
S13), calculating the actual constant current charging time T1i of the first battery pack E1, if U1i ∈ [ U11, U12) and T1i > T11, or U1i ∈ [ U12, U13) and T1i > T12, or U1i ∈ [ U13, U1m ] and T1i > T12, the fault pre-warning unit 22 sends the first battery pack charging timeout fault pre-warning information to the train display device 13 and the ground server 3; and calculating the actual constant current charging time T2i of the second storage battery pack E2, and if U2i belongs to [ U11, U12) and T2i > T11, or U2i belongs to [ U12, U13) and T2i > T12, or U2i belongs to [ U13, U1m ] and T2i > T12, sending charging overtime fault early warning information of the second storage battery pack to the fault early warning unit 22, the train display device 13 and the ground server 3.
2) Storage battery pack temperature signal abnormal fault early warning
In the present embodiment, the train battery pack fault warning system includes two battery packs 10, which are a first battery pack E1 and a second battery pack E2. Whether the temperature signal of the storage battery pack is abnormal or not can be judged by comparing the temperature deviation between the first storage battery pack E1 and the second storage battery pack E2 which are in the same working condition on the same train. If the temperature deviation between the first storage battery pack E1 and the second storage battery pack E2 is too large and exceeds a set threshold value, the abnormal storage battery pack temperature signal information is transmitted to the train display device 13 and simultaneously transmitted to the ground server 3, and a maintainer is reminded to return to a warehouse to check whether the temperature sensor 16 of the storage battery pack 10 is normal or not and whether the storage battery pack 10 is normal or not. The pack real-time (operating) status data associated with the temperature signal abnormality determination is shown in table 2 below.
TABLE 2 storage battery pack temperature signal anomaly associated data information
Figure RE-GDA0002155971730000171
Constraint 1: the charger 11 has no fault;
constraint 2; the battery pack 10 is failure-free.
If the two constraint conditions are simultaneously met, the following calculation is carried out on the associated data:
if the fault early warning unit 22 determines that the two constraint conditions are simultaneously satisfied, the associated data is calculated and processed according to the following steps to implement fault early warning:
s21) calculating a difference value of the temperature Tbat1 of the first battery pack E1 and the temperature Tbat2 of the second battery pack E2 as Tdiff, a duration time as Ttime, a temperature deviation early warning threshold value as Ttemp, and a duration time threshold value as Ttmax;
s22) if the difference Tdiff is greater than Ttemp and the duration Ttime is greater than Ttmax, the fault early warning unit 22 reports the abnormal fault early warning information of the temperature signal of the storage battery pack to the train display device 13 and the ground server 3;
s23) if the temperature Tbat1 of the first battery pack E1 is lower than the ambient temperature Tenv and exceeds the set threshold value (for example: 10 ℃), the fault early warning unit 22 sends the abnormality of the temperature sensor 16 of the first storage battery pack E1 to the train display device 13 and the ground server 3; if the temperature Tbat2 of the second battery pack E2 is lower than the ambient temperature Tenv and exceeds a predetermined threshold (e.g., 10 ℃), the malfunction early warning unit 22 transmits an abnormality to the train display device 13 and the ground server 3 that the temperature sensor 16 of the second battery pack E2 is abnormal.
3) Storage battery pack fixed load short circuit fault early warning
In the present embodiment, the train battery pack fault warning system includes two battery packs 10, which are a first battery pack E1 and a second battery pack E2. Whether the battery pack fixed load is short-circuited or not can be analyzed by receiving the real-time status data of the battery pack, and the associated real-time (operating) status data of the battery pack is shown in the following table 3. If the charger 11 is in a current-limiting output or overcurrent protection working condition, if the reduction rate of the voltage of the storage battery pack in a short time exceeds a set threshold, transmitting the short-circuit information of the fixed load of the storage battery pack to a train display device 13 and simultaneously transmitting the short-circuit information to the ground server 3, and reminding a maintainer to return to a warehouse to check whether a voltage sensor 14 of the storage battery pack 10 is normal, whether a current sensor 15 of the storage battery pack 10 is normal and whether the storage battery pack 10 is normal.
TABLE 3 Battery pack fixed load short circuit associated data information
Figure RE-GDA0002155971730000181
Constraint 1: the current limiting output of the charger 11;
constraint 2: the charger 11 outputs overcurrent;
constraint 3: the charger 11 charges an overcurrent.
If the fault early warning unit 22 determines that any one of the three constraint conditions is satisfied, the associated data is calculated and processed according to the following steps to implement fault early warning:
s31) calculating the actual rate of decrease in the voltage U1bat of the first battery pack E1 to be V1bat V/min if the charging current of the first battery pack E1 is greater than 0; if the charging current of second battery pack E2 is greater than 0, calculating the actual rate of decrease in voltage U2bat of second battery pack E2 as V2bat V/min; setting the early warning threshold value of the voltage reduction rate of the storage battery 10 as Vmax V/min;
s32) if the voltage drop rate V1bat of the first battery pack E1 is greater than Vmax, the failure early warning unit 22 sends the first battery pack fixed load short circuit failure early warning information to the train display device 13 and the ground server 3; if the voltage drop rate V2bat of the second battery pack E2 is greater than Vmax, the failure warning unit 22 transmits second battery pack fixed-load short-circuit failure warning information to the train display device 13 and the ground server 3.
4) Storage battery pack capacity degradation fault early warning
In the present embodiment, the train battery pack fault warning system includes two battery packs 10, which are a first battery pack E1 and a second battery pack E2. Whether the battery pack capacity is degraded or not can be determined by analyzing the received battery pack real-time status data, and the associated battery pack real-time (operating) status data is shown in table 4 below. If the electric quantity acquired by the storage battery pack is less than a set threshold value in the constant voltage charging continuous stage, which indicates that the capacity of the storage battery pack is possibly degraded, the capacity degradation information of the storage battery is transmitted to a train display device 13 and is simultaneously transmitted to a ground server 3, and a maintainer is reminded to return to a warehouse to check whether the storage battery pack 10 is normal or not.
TABLE 4 storage battery capacity degradation associated data information
Figure RE-GDA0002155971730000191
Constraint 1: the charger 11 has no fault;
constraint 2: the battery pack 10 is failure-free;
constraint 3: the battery pack 10 is in a constant voltage charging condition.
If the fault early warning unit 22 determines that the three constraint conditions are simultaneously satisfied, the associated data is calculated and processed according to the following steps to implement fault early warning:
s41) during the constant voltage charging phase, the charging current of the first battery pack E1 is Icv1, the charging current of the second battery pack E2 is Icv2, the constant voltage charging start time of the first battery pack E1 is Tstart1, the end time is Tend1, the constant voltage charging start time of the second battery pack E2 is Tstart2, and the end time is Tend 2;
s42) dividing the average temperature of the first battery pack E1 and the second battery pack E2 in the constant voltage charging continuous stage into three intervals of [ Tbat11, Tbat12 ], [ Tbat12, Tbat13 ], [ Tbat13, Tbat1m ], wherein Tbat1m is the temperature alarm threshold corresponding to the battery pack 10; when the actual temperature of the battery pack 10 is in the three intervals, the corresponding charging electric quantity thresholds are Q11, Q12, Q13, respectively;
s43) calculating the average temperature T1bat _ ave and the charged capacity of the first secondary battery pack E1 throughout the constant-voltage charging continuation period
Figure RE-GDA0002155971730000192
If T1bat _ ave e [ Tbat11, Tbat12) and Q1<Q11, or T1bat _ ave e [ Tbat12, Tbat13) and Q1<Q12, or T1bat _ ave e [ Tbat ∈ [ ]13,Tbat1m]And Q1<Q13, the fault early warning unit 22 sends the capacity degradation fault early warning information of the first storage battery pack to the train display device 13 and the ground server 3; calculating average temperature T2bat _ ave and charge capacity of second battery pack E2 throughout the constant-voltage charge continuation period
Figure RE-GDA0002155971730000193
If T2bat _ ave e [ Tbat11, Tbat12) and Q2<Q11, or T2bat _ ave e [ Tbat12, Tbat13) and Q2<Q12, or T2bat _ ave e [ Tbat13, Tbat1m]And Q2<Q13, the failure warning unit 22 sends the capacity degradation failure warning information of the second battery pack to the train display device 13 and the ground server 3.
By implementing the technical scheme of the train storage battery pack fault early warning system and the train storage battery pack fault early warning method described in the specific embodiment of the invention, the following technical effects can be achieved:
(1) according to the train storage battery pack fault early warning system and method, the fault early warning of the train storage battery pack is realized under the condition that a sensor and other equipment are not additionally arranged, the state parameters related to the storage battery in the existing network data of the train are processed and analyzed by constructing the data processing unit and the fault early warning unit, the real-time fault early warning function of the storage battery pack is realized by only utilizing the existing real-time network data, any sensor is not required to be additionally arranged, and any change is not required to be carried out on the original equipment;
(2) the fault early warning system and the fault early warning method for the train storage battery pack are described in the specific embodiment of the invention, and the fault early warning method for the vehicle-mounted storage battery pack based on expert rules is provided, so that the early warning of various faults of constant-current charging overtime, temperature signal abnormity, fixed load short circuit and capacity degradation of the storage battery pack is completed by evaluating the deviation degree of real-time state data and normal state data of the storage battery pack, the predictive maintenance of the storage battery pack can be realized, and the running safety of a train is greatly improved.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the spirit and scope of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the protection scope of the technical solution of the present invention.

Claims (28)

1. A train storage battery pack fault early warning system is characterized by comprising: the system comprises a storage battery pack (10), a charger (11), a train control and management system (12), a data processing unit (21) and a fault early warning unit (22); the charger (11) uploads the real-time state data of the storage battery pack to a train control and management system (12); the train control and management system (12) sends real-time network data containing storage battery pack real-time status data to the data processing unit (21); the data processing unit (21) analyzes the received real-time network data and extracts the real-time state data of the storage battery pack from the received real-time network data; the fault early warning unit (22) analyzes the extracted real-time state data of the storage battery pack to obtain the state of the storage battery pack (10) and outputs fault early warning prompt information.
2. The train battery pack fault early warning system of claim 1, wherein: the charger (11) uploads the relevant state information of the storage battery to a train control and management system (12) through a train bus; the data processing unit (21) receives and stores real-time network data in the train control and management system (12) through a train bus.
3. The train battery pack fault early warning system according to claim 1 or 2, characterized in that: the data processing unit (21) analyzes the received real-time network data according to a data communication protocol and extracts the real-time state data of the storage battery pack from the received real-time network data.
4. The train battery pack fault warning system of claim 3, wherein the real-time network data includes, but is not limited to: the system comprises train running information, full-train equipment state information and full-train real-time fault information, wherein the full-train equipment state information comprises storage battery pack real-time state data.
5. The train battery pack fault warning system of claim 4, wherein the battery pack real-time status data includes, but is not limited to: the device comprises an environment temperature, a storage battery pack voltage, a storage battery pack charging current, a charger output current, a charger charging overcurrent flag bit and a charger output overcurrent flag bit.
6. The train battery pack fault early warning system of claim 1, 2, 4 or 5, wherein: the charging machine (11) acquires voltage, charging current and temperature information of the storage battery pack (10) through a voltage sensor (14), a current sensor (15) and a temperature sensor (16), combines an output current, a charging overcurrent flag bit and an output overcurrent flag bit of the charging machine (11), and uploads the output overcurrent flag bit to a train control and management system (12) through a train bus; the train control and management system (12) packs real-time network data including train operation information, whole-train equipment state information and whole-train real-time fault information according to a set message format and then transmits the real-time network data to the data processing unit (21) through a train bus.
7. The train battery pack fault early warning system of claim 6, wherein: after receiving the real-time network data transmitted by the train control and management system (12), the data processing unit (21) stores the real-time network data, formats the real-time network data by adopting a message format of train-ground communication, and waits for wireless transmission according to a train-ground communication protocol; the data processing unit (21) analyzes the real-time network data according to a set message format, reads and caches the vehicle number, time and environment temperature data, the voltage, charging current and temperature data of the storage battery pack (10), the output current, charging overcurrent flag bit and output overcurrent flag bit data of the charger (11), and transmits the analyzed data to the fault early warning unit (22) in a specified format according to requirements.
8. The train battery pack fault warning system of claim 1, 2, 4, 5 or 7, wherein: the fault early warning unit (22) analyzes the extracted real-time state data of the storage battery pack by using an expert rule; and after the analyzed real-time state data of the storage battery pack is transmitted to the fault early warning unit (22), the storage battery pack enters different storage battery pack fault early warning item points according to requirements, the deviation degree between the real-time state data and the normal state data of the storage battery pack is evaluated through a coded expert rule, and if the deviation degree exceeds a preset threshold value obtained through statistical analysis, fault early warning information is sent.
9. The train battery pack fault early warning system of claim 8, wherein: the system further comprises a wireless transmission module (23) and a ground server (3), wherein the data processing unit (21), the fault early warning unit (22) and the wireless transmission module (23) are based on a vehicle-mounted cloud platform; the wireless transmission module (23) and the ground server (3) perform wireless data transmission through a vehicle-ground communication protocol, and the wireless transmission module (23) is respectively communicated with the data processing unit (21), the fault early warning unit (22) and the ground server (3); the real-time state data and the fault early warning information of the storage battery pack are respectively transmitted to a wireless transmission module (23) from the data processing unit (21) and the fault early warning unit (22), and then are transmitted to a ground server (3) by the wireless transmission module (23); the system also comprises a train display device (13), the wireless transmission module (23) receives the information transmitted by the ground server (3), and the information is interacted with the train display device (13) through the train control and management system (12) to guide drivers and passengers to take corresponding fault handling measures.
10. The train battery pack fault early warning system of claim 9, wherein: real-time network data including real-time state data of the storage battery pack are stored in the data processing unit (21), and the real-time network data are transmitted to the ground server (3) through the wireless transmission module (23) in a WLAN (wireless local area network) mode after a train enters a station or returns to a depot; the wireless transmission module (23) transmits the data request instruction sent by the ground server (3) to the data processing unit (21).
11. The train battery pack fault warning system according to claim 9 or 10, wherein: if the real-time state data of the storage battery pack sends out fault early warning information after being judged by expert rules, the fault early warning unit (22) sends the fault early warning information to the wireless transmission module (23), and the wireless transmission module (23) transmits the fault early warning information to the ground server (3) in real time in a mode including GSM-R or LTE-R, so that the ground server (3) analyzes reasons and generates fault handling measures.
12. The train battery pack fault warning system of claim 11, wherein the ground server information received by the wireless communication module (23) includes but is not limited to: and checking whether the connection is interrupted by heartbeat data packets, wireless transmission performance configuration instructions and storage battery pack fault handling instructions.
13. The train battery pack fault warning system according to claim 1, 2, 4, 5, 7, 9, 10 or 12, wherein: the fault early warning unit (22) judges whether the storage battery pack (10) is subjected to constant current charging overtime according to time, train number, storage battery pack charging voltage and storage battery pack charging current; and if the constant-current charging duration time exceeds a set threshold value, transmitting the overtime constant-current charging information of the storage battery pack to the train display device (13) and simultaneously transmitting the overtime constant-current charging information to the ground server (3) so as to prompt a maintainer to return to a warehouse to check whether the current sensor (15) is normal or not and whether the storage battery pack (10) is normal or not.
14. The train battery pack fault warning system according to claim 1, 2, 4, 5, 7, 9, 10 or 12, wherein: when the system comprises two storage battery packs (10) which are respectively a first storage battery pack (E1) and a second storage battery pack (E2), the fault early warning unit (22) judges whether a storage battery pack temperature signal is abnormal or not according to time, train number, environment temperature, first storage battery pack temperature and second storage battery pack temperature, and judges by comparing temperature deviation between the first storage battery pack (E1) and the second storage battery pack (E2) which are in the same working condition on the same train; if the temperature deviation between the first storage battery pack (E1) and the second storage battery pack (E2) exceeds a set threshold value, transmitting the abnormal storage battery pack temperature signal information to a train display device (13) and simultaneously transmitting the abnormal storage battery pack temperature signal information to a ground server (3) so as to prompt a maintainer to check whether the temperature sensor (16) is normal or not and whether the storage battery pack (10) is normal or not.
15. The train battery pack fault warning system according to claim 1, 2, 4, 5, 7, 9, 10 or 12, wherein: the fault early warning unit (22) judges whether the fixed load of the storage battery pack is short-circuited or not according to time, train number, output current of the charger, charging overcurrent flag bit of the charger, output overcurrent flag bit of the charger, voltage of the storage battery pack and charging current of the storage battery pack, and analyzes received real-time state data of the storage battery pack, if the charger (11) is in a current limiting output or overcurrent protection working condition and the voltage of the storage battery pack drops at a rate exceeding a set threshold value in a short time, the short-circuit information of the fixed load of the storage battery pack is transmitted to a train display device (13) and simultaneously transmitted to a ground server (3) so as to prompt a maintainer to check whether a voltage sensor (14) is normal or not, whether a current sensor (15) is normal.
16. The train battery pack fault warning system according to claim 1, 2, 4, 5, 7, 9, 10 or 12, wherein: the fault early warning unit (22) judges whether the capacity of the storage battery pack is degraded or not according to time, train number, charging voltage of the storage battery pack, charging current of the storage battery pack and temperature of the storage battery pack, and analyzes received real-time state data of the storage battery pack; and if the electric quantity acquired by the storage battery pack (10) is less than a set threshold value in the constant voltage charging continuous stage, transmitting the capacity degradation information of the storage battery pack to a train display device (13) and simultaneously transmitting the capacity degradation information to a ground server (3) so as to prompt a maintainer to return to a warehouse to check whether the storage battery pack (10) is normal or not.
17. A fault early warning method for a train storage battery pack is characterized by comprising the following steps:
s101), a charger (11) uploads the real-time state data of the storage battery pack to a train control and management system (12), and a vehicle-mounted cloud platform (2) acquires and stores real-time network data in the train control and management system (12);
s102) the vehicle-mounted cloud platform (2) analyzes the received real-time network data and extracts storage battery pack real-time state data from the received real-time network data;
s103) the vehicle-mounted cloud platform (2) analyzes the extracted real-time state data of the storage battery pack to obtain the state of the storage battery pack (10) and carries out fault early warning prompt.
18. The train storage battery pack fault early warning method according to claim 17, wherein the vehicle-mounted cloud platform (2) comprises a data processing unit (21), and the step S101) further comprises:
the charging machine (11) acquires voltage, charging current and temperature information of the storage battery pack (10) through a voltage sensor (14), a current sensor (15) and a temperature sensor (16), combines an output current, a charging overcurrent flag bit and an output overcurrent flag bit of the charging machine (11), and uploads the output overcurrent flag bit to a train control and management system (12) through a train bus; the train control and management system (12) packs real-time network data including train operation information, whole-train equipment state information and whole-train real-time fault information according to a set message format and then transmits the real-time network data to the data processing unit (21) through a train bus.
19. The train storage battery pack fault early warning method according to claim 18, wherein the vehicle-mounted cloud platform (2) further comprises a fault early warning unit (22), and the step S102) further comprises:
after receiving the real-time network data transmitted by the train control and management system (12), the data processing unit (21) stores the real-time network data, formats the real-time network data by adopting a message format of train-ground communication, and waits for wireless transmission according to a train-ground communication protocol; the data processing unit (21) analyzes the real-time network data according to a set message format, reads and caches the vehicle number, time and environment temperature data, the voltage, charging current and temperature data of the storage battery pack (10), the output current, charging overcurrent flag bit and output overcurrent flag bit data of the charger (11), and transmits the analyzed data to the fault early warning unit (22) in a specified format according to requirements.
20. The train battery pack fault pre-warning method according to claim 17, 18 or 19, wherein the step S103) further comprises:
and after the analyzed real-time state data of the storage battery pack is transmitted to the fault early warning unit (22), the storage battery pack enters different storage battery pack fault early warning item points according to requirements, the deviation degree between the real-time state data and the normal state data of the storage battery pack is evaluated through a coded expert rule, and if the deviation degree exceeds a preset threshold value obtained through statistical analysis, fault early warning information is sent out.
21. The train battery pack fault warning method according to claim 20, wherein the vehicle-mounted cloud platform (2) further comprises a wireless transmission module (23), and the method further comprises:
s104) the wireless transmission module (23) performs wireless data transmission with the ground server (3) through a vehicle-ground communication protocol, and the wireless transmission module (23) is respectively communicated with the data processing unit (21), the fault early warning unit (22) and the ground server (3); the real-time state data and the fault early warning information of the storage battery are respectively transmitted to a wireless transmission module (23) from the data processing unit (21) and the fault early warning unit (22), and then are transmitted to a ground server (3) by the wireless transmission module (23); the system also comprises a train display device (13), the wireless transmission module (23) receives the information transmitted by the ground server (3), and the information is interacted with the train display device (13) through the train control and management system (12) to guide drivers and passengers to take corresponding fault handling measures.
22. The train battery pack fault pre-warning method according to claim 21, wherein the step S104) further comprises:
real-time network data including real-time state data of the storage battery pack are stored in the data processing unit (21), and the real-time network data are transmitted to the ground server (3) through the wireless transmission module (23) in a WLAN (wireless local area network) mode after a train enters a station or returns to a depot; the wireless transmission module (23) transmits the data request instruction sent by the ground server (3) to the data processing unit (21).
23. The train battery pack fault pre-warning method according to claim 21 or 22, wherein the step S104) further comprises:
if the real-time state data of the storage battery pack sends out fault early warning information after being judged by expert rules, the fault early warning unit (22) sends the fault early warning information to the wireless transmission module (23), and the wireless transmission module (23) transmits the fault early warning information to the ground server (3) in real time in a mode including GSM-R or LTE-R, so that the ground server (3) analyzes reasons and generates fault handling measures.
24. The train storage battery pack fault early warning method according to claim 23, wherein: the information of the ground server (3) received by the wireless communication module (23) includes but is not limited to: and checking whether the connection is interrupted by heartbeat data packets, wireless transmission performance configuration instructions and storage battery pack fault handling instructions.
25. The train battery pack fault early warning method according to claim 17, 18, 19, 21, 22 or 24, wherein: when the system comprises two storage battery packs (10) which are respectively a first storage battery pack (E1) and a second storage battery pack (E2), if the fault early warning unit (22) judges that three conditions of no fault of a charger (11), no fault of the storage battery packs (10) and the storage battery packs (10) in a constant-current charging working condition are met simultaneously, calculation and processing are carried out according to the following steps so as to realize fault early warning:
s11) acquiring the voltage of a first storage battery pack (E1) as the initial voltage U1i of the first storage battery pack (E1) and the voltage of a second storage battery pack (E2) as the initial voltage U2i of the second storage battery pack (E2) when a charger (11) is in a standby working condition;
s12) dividing the initial voltage of the first storage battery pack (E1) and the second storage battery pack (E2) into three sections of [ U11, U12 ], [ U12, U13 ], [ U13, U1m ], wherein U1m is the voltage for the charger (11) to charge the storage battery pack (10); when the actual initial voltage of the storage battery pack (10) is in the three intervals, the corresponding charging overtime thresholds are respectively T11, T12 and T13;
s13) calculating the actual constant current charging time T1i of the first storage battery pack (E1), if U1i belongs to [ U11, U12) and T1i > T11, or U1i belongs to [ U12, U13) and T1i > T12, or U1i belongs to [ U13, U1m ] and T1i > T12, the fault early warning unit (22) sends the first storage battery pack charging overtime fault early warning information to the train display device (13) and the ground server (3); and calculating the actual constant current charging time T2i of the second storage battery pack (E2), and if U2i belongs to [ U11, U12 ] and T2i > T11, or U2i belongs to [ U12, U13 ] and T2i > T12, or U2i belongs to [ U13, U1m ] and T2i > T12, sending second storage battery pack overtime charging fault early warning information to the fault early warning unit (22), the train display device (13) and the ground server (3).
26. The train battery pack fault early warning method according to claim 17, 18, 19, 21, 22 or 24, wherein: when the system comprises two storage battery packs (10) which are respectively a first storage battery pack (E1) and a second storage battery pack (E2), if the fault early warning unit (22) judges that two conditions of no fault of the charger (11) and no fault of the storage battery pack (10) are simultaneously met, calculation and processing are carried out according to the following steps so as to realize fault early warning:
s21) calculating a difference value of the temperature Tbat1 of the first battery pack (E1) and the temperature Tbat2 of the second battery pack (E2) as Tdiff, the duration as Ttime, the temperature deviation warning threshold value as Ttemp, and the duration threshold value as Ttmax;
s22) if the difference Tdiff is greater than Ttemp and the duration Ttime is greater than Ttmax, the fault early warning unit (22) reports the abnormal fault early warning information of the temperature signal of the storage battery pack to the train display device (13) and the ground server (3);
s23) if the temperature Tbat1 of the first battery pack (E1) is lower than the ambient temperature Tenv and exceeds the set threshold value on the premise that the battery pack temperature signal is abnormal, the failure warning unit (22) sends the abnormality of the temperature sensor (16) of the first battery pack (E1) to the train display device (13) and the ground server (3); if the temperature Tbat2 of the second battery pack (E2) is lower than the ambient temperature Tenv and exceeds a set threshold value, the fault early warning unit (22) sends the abnormality of the temperature sensor (16) of the second battery pack (E2) to the train display device (13) and the ground server (3).
27. The train battery pack fault early warning method according to claim 17, 18, 19, 21, 22 or 24, wherein: when the system comprises two storage battery packs (10) which are respectively a first storage battery pack (E1) and a second storage battery pack (E2), if the fault early warning unit (22) judges that any one of the three conditions of current-limiting output of the charger (11), output overcurrent of the charger (11) and charging overcurrent of the charger (11) is met,
then the calculation and processing are carried out according to the following steps to realize the fault early warning:
s31) calculating the actual rate of decrease in the voltage U1bat of the first battery pack (E1) to be V1bat V/min if the first battery pack (E1) charge current is greater than 0; if the second battery pack (E2) charging current is greater than 0, calculating the actual rate of decrease in voltage U2bat of the second battery pack (E2) to be V2bat V/min; setting an early warning threshold value of the voltage reduction rate of the storage battery (10) as Vmax V/min;
s32) if the voltage drop rate V1bat of the first storage battery pack (E1) is larger than Vmax, the fault early warning unit (22) sends first storage battery pack fixed load short circuit fault early warning information to the train display device (13) and the ground server (3); if the voltage drop rate V2bat of the second storage battery pack (E2) is larger than Vmax, the fault early warning unit (22) sends second storage battery pack fixed load short circuit fault early warning information to the train display device (13) and the ground server (3).
28. The train battery pack fault early warning method according to claim 17, 18, 19, 21, 22 or 24, wherein: when the system comprises two storage battery packs (10) which are respectively a first storage battery pack (E1) and a second storage battery pack (E2), if the fault early warning unit (22) judges that three conditions of no fault of a charger (11), no fault of the storage battery packs (10) and constant-voltage charging working condition of the storage battery packs (10) are met simultaneously, calculation and processing are carried out according to the following steps so as to realize fault early warning:
s41) during the constant voltage charging phase, the charging current of the first battery pack (E1) is Icv1, the charging current of the second battery pack (E2) is Icv2, the constant voltage charging start time of the first battery pack (E1) is Tstart1, the end time is Tend1, the constant voltage charging start time of the second battery pack (E2) is Tstart2, and the end time is Tend 2;
s42) dividing the average temperature of the first storage battery pack (E1) and the second storage battery pack (E2) in the constant voltage charging continuous stage into three intervals of [ Tbat11, Tbat12 ], [ Tbat12, Tbat13 ], [ Tbat13, Tbat1m ], wherein Tbat1m is the temperature alarm threshold corresponding to the storage battery pack (10); when the actual temperature of the storage battery pack (10) is in the three intervals, the corresponding charging electric quantity thresholds are Q11, Q12 and Q13 respectively;
s43) calculating an average temperature T1bat _ ave and a charged capacity of the first secondary battery pack (E1) throughout the constant voltage charging continuation period
Figure FDA0002032444410000071
If T1bat _ ave e [ Tbat11, Tbat12) and Q1<Q11, or T1bat _ ave e [ Tbat12, Tbat13) and Q1<Q12, or T1bat _ ave e [ Tbat13, Tbat1m]And Q1<Q13, the fault early warning unit (22) sends first storage battery pack capacity degradation fault early warning information to the train display device (13) and the ground server (3); calculating the average temperature T2bat _ ave and the charge capacity of the second battery pack (E2) in the whole constant voltage charge continuous period
Figure FDA0002032444410000081
If T2bat _ ave e [ Tbat11, Tbat12) and Q2<Q11, or T2bat _ ave e [ Tbat12, Tbat13) and Q2<Q12, or T2bat _ ave e [ Tbat13, Tbat1m]And Q2<And Q13, the fault early warning unit (22) sends the capacity degradation fault early warning information of the second storage battery pack to the train display device (13) and the ground server (3).
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