CN118818197B - An intelligent charging and discharging test device and method for electric vehicles - Google Patents
An intelligent charging and discharging test device and method for electric vehicles Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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Abstract
The invention relates to the technical field of electric automobile testing, and discloses an intelligent charging and discharging testing device and method for an electric automobile, which are suitable for charging and discharging accurate control testing, charging and discharging compatibility evaluation testing, power battery state evaluation testing and direct current charging electromagnetic compatibility testing items; the device comprises a charge-discharge control unit, a charge-discharge metering unit, a bidirectional AC/DC electric energy conversion unit, an insulation monitoring unit, a switch unit, a charge-discharge connection unit, a message reading unit, a wireless communication unit, a temperature acquisition unit and an industrial control unit, wherein the insulation monitoring unit is connected with the switch unit and the bidirectional AC/DC electric energy conversion unit, the message reading unit is connected with the charge-discharge connection unit and the industrial control unit, and the cloud platform is connected with the wireless communication unit and the industrial control unit. The invention can actively control whether the insulation monitoring function is started or not, realize accurate control of charge and discharge current and improve the accuracy, controllability and reliability of charge and discharge test.
Description
Technical Field
The invention relates to the technical field of electric automobile testing, in particular to an intelligent charging and discharging testing device and method for an electric automobile.
Background
The existing charging pile technology gradually integrates more intelligent functions such as wireless communication, remote monitoring and control, data analysis and the like, so that the charging pile can be better integrated into a smart grid system. The EMC test is an important test for ensuring the safety of the charging pile, and the EMC test technology mainly focuses on the electromagnetic compatibility of the product and comprises an EMI test for evaluating the electromagnetic interference (Electromagnetic Interference, EMI) level generated by the product and ensuring that the product cannot cause interference to other electronic equipment. And (3) EMS test, namely evaluating the immunity (Electromagnetic Susceptibility, EMS) of the product to electromagnetic interference, and ensuring that the product can work normally in an electromagnetic environment. Special tests include surge tests, voltage variations and flicker tests, etc., which are performed according to international or regional standards, such as VDE 0843, etc.
In the prior art, the existing test equipment cannot meet the requirements of future electromagnetic compatibility (EMC) tests, and particularly, the current adjustable requirements cannot accurately control the charge and discharge current. And the insulation monitoring function in the existing charging pile equipment always keeps on, so that the problem that false alarm is caused under a specific test environment (such as EMC test) and the test process is influenced is caused.
Therefore, an intelligent charge-discharge testing device and method for an electric automobile are needed, which can actively control whether an insulation monitoring function is started, realize accurate control of charge-discharge current and improve the accuracy, controllability and reliability of charge-discharge testing.
Disclosure of Invention
In order to solve the technical problems, the invention provides an intelligent charge and discharge testing device and method for an electric automobile, which can actively control whether an insulation monitoring function is started, realize accurate control of charge and discharge current and improve the accuracy, controllability and reliability of charge and discharge testing.
The invention provides an intelligent charge-discharge testing device of an electric automobile, which is suitable for charge-discharge accurate control tests, charge-discharge compatibility evaluation tests, power battery state evaluation tests and direct current charge electromagnetic compatibility test items, and comprises a charge-discharge control unit, a low-voltage power supply unit, a charge-discharge metering unit, a bidirectional AC/DC electric energy conversion unit, an insulation monitoring unit, a switch unit, a charge-discharge connection unit, a message reading unit, a wireless communication unit, an industrial control unit and a cloud platform;
The system comprises an industrial control unit, a charge-discharge control unit, a wireless communication unit, a control unit and a control unit, wherein the charge-discharge control unit is used for receiving an instruction issued by the industrial control unit or receiving an instruction issued by the cloud platform through the wireless communication unit;
The low-voltage power supply unit is connected with the charge-discharge control unit and is used for converting the energy of the alternating-current power supply into low-voltage direct-current energy required by the normal operation of the charge-discharge control unit;
the charge-discharge metering unit is connected with the charge-discharge control unit and is used for collecting alternating current input and direct current output electric energy parameters and uploading information to the charge-discharge control unit so as to control the output voltage and current;
The bidirectional AC/DC electric energy conversion unit is connected with the charge and discharge control unit and the low-voltage power supply unit and is used for realizing bidirectional AC/DC conversion and charging and discharging;
The insulation monitoring unit is connected with the charge-discharge control unit and the bidirectional AC/DC electric energy conversion unit and is used for realizing insulation monitoring in a charge-discharge process, and a switch or a relay is integrated in the insulation monitoring unit and can be turned on or turned off according to an instruction of the charge-discharge control unit so as to control the insulation monitoring unit to be enabled or turned off;
The switch unit is connected with the charge and discharge control unit and the insulation monitoring unit and is used for communicating or switching off energy transmission;
the charging and discharging connection unit is connected with the charging and discharging control unit and the switch unit and is used for being matched with a charging interface of the electric automobile to realize charging and discharging of the electric automobile;
The message reading unit is connected with the charge-discharge connection unit and the industrial control unit and is used for reading and analyzing the communication message in the charge-discharge process and obtaining the parameters in the charge-discharge process and the state quantity of the power battery;
The wireless communication unit is connected with the charge and discharge control unit and the cloud platform and is used for realizing the communication between the charge and discharge control unit and the cloud platform;
The industrial control unit is connected with the charge and discharge control unit and the cloud platform, and is used for realizing charge and discharge, displaying charge and discharge process information, and collecting, recording and analyzing charge and discharge communication messages in real time;
The cloud platform is connected with the wireless communication unit and the industrial control unit and is used for acquiring all information in the charging and discharging process and acquiring all information acquired by the charging and discharging control unit.
Further, the industrial control unit comprises a charge-discharge control module, a charge-discharge electromagnetic compatibility test control module, a charge-discharge compatibility diagnosis module and a power battery state evaluation module;
the charge-discharge control module is used for receiving a preset charge-discharge current value, controlling charge and discharge and displaying charge-discharge information;
The charge-discharge electromagnetic compatibility test control module is used for controlling charge-discharge and charge-discharge current, controlling the enabling or closing of the insulation monitoring unit and displaying charge-discharge information;
The system comprises a charge-discharge compatibility diagnosis module, a charge-discharge compatibility diagnosis module and a charge-discharge diagnosis module, wherein the charge-discharge compatibility diagnosis module is used for automatically recording communication messages in the charge-discharge process and giving compatibility diagnosis results according to the communication messages;
the power battery state evaluation module is used for automatically recording the characterization parameters of the power battery and analyzing the power battery state according to the characterization parameters of the power battery.
Further, the charge and discharge control module includes:
The charge and discharge parameter setting submodule is used for setting charge and discharge parameters including a charge and discharge current value and a charge and discharge cut-off SOC;
And the charge and discharge information display sub-module is used for displaying parameters in the charge and discharge process, including charge and discharge voltage, charge and discharge current, battery SOC and power terminal temperature in the charge and discharge connection unit.
Further, the charge-discharge electromagnetic compatibility test control module includes:
the test parameter setting submodule is used for setting charge and discharge current values according to test requirements;
the function control submodule is used for closing or enabling the insulation monitoring unit according to the test requirement;
and the charge and discharge information display sub-module is used for displaying parameters in the charge and discharge process.
Further, the charge-discharge compatibility diagnosis module includes:
The charge and discharge data processing sub-module is connected with the charge and discharge connection unit through the message reading unit and is used for collecting, recording and analyzing charge and discharge communication messages in real time;
The compatibility analysis submodule is used for analyzing whether the time sequence of the charge-discharge communication message and the message filling content have problems or not and carrying out charge-discharge compatibility analysis;
and the charge and discharge information display sub-module is used for displaying parameters in the charge and discharge process.
Further, the power battery state evaluation module includes:
the data processing sub-module is connected with the charge-discharge connection unit through the message reading unit and is used for collecting, recording, analyzing and extracting the characterization parameters of the power battery in the charge-discharge communication message in real time and collecting the charge-discharge environment temperature in real time by the temperature collecting unit;
And the state analysis sub-module is embedded with a power battery state analysis model and an algorithm and used for carrying out battery state analysis according to the data acquired by the data processing sub-module.
Further, the insulation monitoring unit is kept in an on state in a normal charge and discharge process, and is kept in an off state in a direct current charge electromagnetic compatibility test process.
Further, the intelligent charge and discharge testing device of the electric automobile further comprises a temperature acquisition unit, wherein the temperature acquisition unit is connected with the charge and discharge control unit and used for acquiring the charge and discharge environment temperature working conditions in real time.
The invention also provides an intelligent charging and discharging test method for the electric automobile, which is used for executing the intelligent charging and discharging test device for the electric automobile, and specifically comprises the following steps:
The accurate control test of charge and discharge specifically comprises the following steps:
Inputting a preset charging current value or a preset discharging current value through a charging and discharging control module in the industrial control unit;
The charge-discharge control module determines an actual lower power generation value according to a preset charge current value or a preset discharge current value and a protection strategy, wherein the protection strategy is to select the minimum value of the preset charge current value or the preset discharge current value, a power battery charge-discharge current demand value and a power battery 1C charge-discharge current value as the actual lower power generation value according to the preset charge current value or the preset discharge current value and the power battery charge-discharge current demand value;
the charge and discharge control unit sends the current value to the bidirectional AC/DC electric energy conversion unit according to the actual current value to realize accurate charge and discharge;
The charge-discharge compatibility evaluation test specifically comprises the following steps:
Inserting a charging and discharging connection unit into the vehicle to be tested, and charging or discharging the vehicle to be tested;
the communication message in the charge-discharge process is automatically recorded through a charge-discharge compatibility diagnosis module in the industrial control unit;
Comparing the communication message recorded in the current charge and discharge process with a charge and discharge compatibility database built in the industrial control unit to obtain a compatibility diagnosis result;
The power battery state evaluation test specifically comprises the following steps:
inserting a charge-discharge connection unit into the vehicle to be tested;
recording an initial SOC value before starting charging or discharging by a power battery state evaluation module in the industrial control unit;
charging or discharging the vehicle to be tested for preset time according to the current SOC state of the vehicle to be tested, and recording a cut-off SOC value after stopping charging or discharging;
calculating the health state of the power battery;
the direct current charging electromagnetic compatibility test specifically comprises the following steps:
the insulation monitoring unit is controlled to be closed by a charge-discharge electromagnetic compatibility test control module in the industrial control unit;
inputting a preset charging current value or a preset discharging current value through a charging and discharging electromagnetic compatibility test control module in the industrial control unit;
the charge-discharge electromagnetic compatibility test control module determines an actual lower power generation value according to a preset charge current value or a preset discharge current value and a protection strategy;
and the charge and discharge control unit sends the current value to the bidirectional AC/DC electric energy conversion unit according to the actual current value, realizes accurate charge and discharge, and performs direct current charge electromagnetic compatibility test.
The embodiment of the invention has the following technical effects:
The invention realizes accurate and safe charge and discharge control through the mutual coordination of the industrial control unit, the charge and discharge control unit and the insulation monitoring unit, ensures that the actual charge and discharge current cannot be excessively damaged to the battery by setting a protection strategy for charge and discharge, realizes automatic recording of communication messages in the charge and discharge process, compares the communication messages with a database to evaluate the communication compatibility between a vehicle and a charging pile, can judge whether a communication flow meets standard regulation and check the accuracy and stability of data transmission, provides a simple and convenient method for estimating the health state of the power battery by analyzing relevant parameters in the charge and discharge communication messages, realizes the accurate control of the charge and discharge current, can meet the requirement of the future EMC standard on current adjustability, can close the insulation monitoring function of the charging pile in EMC test, avoids error messages caused by a filter and ensures the smooth proceeding of the test;
in addition, through the cloud platform, remote monitoring, data analysis and control on the charging and discharging process can be realized, and management and maintenance efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an intelligent charge-discharge testing device for an electric vehicle according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a charge-discharge control module according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of a charge-discharge electromagnetic compatibility test control module according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a charge-discharge compatibility diagnosis module according to an embodiment of the present invention;
Fig. 5 is a schematic structural diagram of a power battery state evaluation module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the invention, are within the scope of the invention.
The invention provides an intelligent charging and discharging test device for an electric automobile, wherein fig. 1 is a schematic structural diagram of the intelligent charging and discharging test device for the electric automobile, which is shown in fig. 1, and is suitable for charging and discharging accurate control test, charging and discharging compatibility evaluation test, power battery state evaluation test and direct current charging electromagnetic compatibility test items, and the device comprises:
The device comprises a charge-discharge control unit, a low-voltage power supply unit, a charge-discharge metering unit, a bidirectional AC/DC electric energy conversion unit, an insulation monitoring unit, a switch unit, a charge-discharge connection unit, a message reading unit, a wireless communication unit, a temperature acquisition unit, an industrial control unit and a cloud platform.
Furthermore, a liquid cooling cold source can be added according to the requirement of the charge and discharge power, and meanwhile, the charge and discharge connection unit is also required to be configured as a charge and discharge connection unit with liquid cooling.
The charging and discharging control unit is used for receiving the instruction issued by the industrial control unit or the instruction issued by the cloud platform through the wireless communication unit, uploading information to the industrial control unit or uploading information to the cloud platform through the wireless communication unit, and collecting and controlling information of other units (except the industrial control unit and the power supply unit) connected with the charging and discharging control unit.
The low-voltage power supply unit is connected with the charge-discharge control unit and is used for converting the energy of the alternating-current power supply into low-voltage direct-current energy required by the normal operation of the charge-discharge control unit.
And the charge and discharge metering unit is connected with the charge and discharge control unit and used for collecting the alternating current input and direct current output electric energy parameters and uploading information to the charge and discharge control unit so as to control the output voltage and current.
The alternating current input comprises the voltage and the current of three-phase alternating current, and the direct current output comprises the output voltage and the current of the charging and discharging connection unit.
And the bidirectional AC/DC electric energy conversion unit is connected with the charge and discharge control unit and the low-voltage power supply unit and is used for realizing bidirectional AC/DC conversion and realizing charge and discharge.
The insulation monitoring unit is connected with the charge-discharge control unit and the bidirectional AC/DC electric energy conversion unit and is used for realizing insulation monitoring in a charge-discharge process, and a switch or a relay is integrated in the insulation monitoring unit and can be turned on or turned off according to instructions of the charge-discharge control unit, so that the insulation monitoring unit is controlled to be enabled or turned off.
Specifically, a switch or a relay is integrated in the insulation monitoring unit, a charge-discharge electromagnetic compatibility test control module (charge-discharge EMC test control module) in the industrial control unit transmits a command to the charge-discharge control unit, and the charge-discharge control unit controls the switch or the relay integrated in the insulation monitoring unit to be turned on or turned off according to the command, so that the insulation monitoring unit is controlled to be enabled or turned off.
Further, the insulation monitoring unit keeps an on state in a normal charge and discharge process, so that safety risks are avoided, and can keep an off state in a direct current charge electromagnetic compatibility test process, so that interference to an experiment process is avoided.
The switch unit is connected with the charge and discharge control unit and the insulation monitoring unit and is used for communicating or switching off energy transmission.
The charging and discharging connection unit is connected with the charging and discharging control unit and the switch unit and is used for being matched with a charging interface of the electric automobile to realize charging and discharging of the electric automobile, and a temperature sensor is arranged in the charging and discharging connection unit and is used for monitoring temperature rise of the power terminal.
For example, because different national standards are different, the charging and discharging interfaces are also different, and the charging and discharging connection unit in the embodiment can replace muzzle of different standards to adapt to automobiles of different national standards, so as to realize charging and discharging.
The message reading unit is connected with the charge-discharge connection unit and the industrial control unit and is used for reading and analyzing the communication message in the charge-discharge process and obtaining the parameters in the charge-discharge process and the state quantity of the power battery.
By way of example, the parameters of the charge-discharge process and the state quantity of the power battery may include a charge voltage measurement, a charge current measurement, a maximum power battery temperature, a state of charge, SOC, a power battery cell minimum voltage, a power battery cell maximum voltage, etc., as specified in the GB/T27930 standard.
Further, for the vehicle to be tested meeting the Chinese standard, a CAN box CAN be selected as the message reading unit, and for the vehicle to be tested meeting the European standard, a VH5110 of a Vector CAN be selected as the message reading unit.
And the wireless communication unit is connected with the charge and discharge control unit and the cloud platform and is used for realizing the communication between the charge and discharge control unit and the cloud platform.
The temperature acquisition unit is connected with the charge-discharge control unit and is used for acquiring the charge-discharge environment temperature working conditions in real time.
The industrial control unit is connected with the charge and discharge control unit and the cloud platform, is used for realizing charge and discharge, displaying charge and discharge process information and is used for collecting, recording and analyzing charge and discharge communication messages in real time.
Specifically, the industrial control unit may be connected to the charge and discharge control unit through RS232 (one of serial communication interface standards) or CAN, etc. The industrial control unit comprises a charge-discharge control module, a charge-discharge electromagnetic compatibility test control module, a charge-discharge compatibility diagnosis module and a power battery state evaluation module.
Fig. 2 is a schematic structural diagram of a charge/discharge control module according to an embodiment of the present invention, and referring to fig. 2, the charge/discharge control module is configured to receive a preset charge/discharge current value, control charge and discharge, and display charge/discharge information. The charge-discharge control module includes:
the charge and discharge parameter setting submodule is used for setting charge and discharge parameters including charge and discharge current values, charge and discharge cut-off SOC and the like;
and the charge and discharge information display sub-module is used for displaying parameters in the charge and discharge process, including charge and discharge voltage, charge and discharge current, battery SOC, power terminal temperature in the charge and discharge connection unit and the like.
Fig. 3 is a schematic structural diagram of a charge-discharge electromagnetic compatibility test control module provided in an embodiment of the present invention, referring to fig. 3, and the charge-discharge electromagnetic compatibility test control module is configured to implement charge-discharge and control of charge-discharge current, control enabling or disabling of an insulation monitoring unit, and display charge-discharge information. The charge-discharge electromagnetic compatibility test control module comprises:
the test parameter setting submodule is used for setting charge and discharge current values according to test requirements;
the function control submodule is used for closing or enabling the insulation monitoring unit according to the test requirement;
and the charge and discharge information display sub-module is used for displaying parameters in the charge and discharge process.
Fig. 4 is a schematic structural diagram of a charge-discharge compatibility diagnosis module provided in an embodiment of the present invention, referring to fig. 4, and the charge-discharge compatibility diagnosis module is configured to automatically record a communication message in a charge-discharge process, and provide a compatibility diagnosis result according to the communication message. The charge-discharge compatibility diagnosis module includes:
The charge and discharge data processing sub-module is connected with the charge and discharge connection unit through the message reading unit and is used for collecting, recording and analyzing charge and discharge communication messages in real time;
The compatibility analysis submodule is used for analyzing whether the time sequence of the charge-discharge communication message, the message filling content and the like have problems or not and carrying out charge-discharge compatibility analysis;
and the charge and discharge information display sub-module is used for displaying parameters in the charge and discharge process.
Fig. 5 is a schematic structural diagram of a power battery state evaluation module provided by an embodiment of the present invention, referring to fig. 5, the power battery state evaluation module is configured to automatically record a characterization parameter of a power battery, and perform power battery state analysis according to the characterization parameter of the power battery. The characterization parameters of the power battery can include the highest single power storage battery voltage and the group number thereof, the current state of charge (SOC), the highest power storage battery temperature and the like. The power battery state evaluation module includes:
the data processing sub-module is connected with the charge-discharge connection unit through the message reading unit and is used for collecting, recording, analyzing and extracting the characterization parameters of the power battery in the charge-discharge communication message in real time and collecting the charge-discharge environment temperature in real time by the temperature collecting unit;
And the state analysis sub-module is embedded with a power battery state analysis model and an algorithm and used for carrying out battery state analysis according to the data acquired by the data processing sub-module.
The cloud platform is connected with the wireless communication unit and the industrial control unit and is used for acquiring all information in the charging and discharging process and acquiring all information acquired by the charging and discharging control unit.
By way of example, the wireless communication unit may also issue a charge and discharge control instruction, a charge and discharge EMC test control instruction, and the like, so as to realize the control of the local hardware function through the cloud.
The embodiment of the invention also provides an intelligent charging and discharging test method for the electric automobile, which is executed by the intelligent charging and discharging test device for the electric automobile, and specifically comprises the following steps:
The accurate control test of charge and discharge specifically comprises the following steps:
a1, inputting a preset charging current value or a preset discharging current value through a charging and discharging control module in the industrial control unit.
And a2, the charge-discharge control module determines an actual lower power generation value according to a preset charge current value or a preset discharge current value and a protection strategy.
The protection strategy is that the minimum value is selected as the actual lower power generation current value according to the preset charging current value or the preset discharging current value, the charging and discharging current required value of the power battery, and the charging and discharging current value of the power battery 1C, namely the actual lower power generation current value=min (the preset charging current value or the preset discharging current value, the charging and discharging current required value of the power battery, and the charging and discharging current value of the power battery 1C). C is a multiplying factor for representing the charge-discharge capacity of the battery. 1C represents the current intensity when the battery is fully discharged for one hour. For example, a 18650 battery, nominally 2200ma·h, is discharged at 1C intensity for 1 hour to complete the discharge, at which time the discharge current is 2200mA.
And a3, the charge and discharge control unit sends the current value to the bidirectional AC/DC electric energy conversion unit according to the actual current value of the generated electricity, so that accurate charge and discharge are realized.
The charge-discharge compatibility evaluation test specifically comprises the following steps:
b1, inserting a charging and discharging connection unit into the vehicle to be tested, and charging or discharging the vehicle to be tested.
B2, automatically recording communication messages in the charging and discharging process through a charging and discharging compatibility diagnosis module in the industrial control unit.
And b3, comparing the communication message recorded in the current charge and discharge process with a charge and discharge compatibility database built in the industrial control unit to obtain a compatibility diagnosis result.
Illustratively, the compatibility diagnostic result includes:
① And judging whether the communication flow between the vehicle to be tested and the charging pile accords with a communication protocol regulated by a standard, for example, whether handshake, authentication, data exchange and other processes can be completed correctly.
② And checking the accuracy and stability of data transmission, and ensuring the correct exchange of information in the charging and discharging processes.
The power battery state evaluation test specifically comprises the following steps:
c1, inserting a charge-discharge connection unit into the vehicle to be tested.
Specifically, the vehicle to be tested is driven into the operation area of the intelligent charge-discharge testing device, and the charge-discharge connecting unit is inserted.
And c2, recording an initial SOC value before starting charging or discharging by a power battery state evaluation module in the industrial control unit.
And c3, charging or discharging the vehicle to be tested for preset time according to the current SOC state of the vehicle to be tested, and recording a cut-off SOC value after stopping charging or discharging.
Illustratively, the preset time is typically set to be greater than 10 minutes.
And c4, calculating the health state of the power battery, wherein the calculation formula is as follows:
;
;
Wherein SOH represents the state of health of the battery, Q Currently, the method is that represents the current SOC value of the battery, Q Initial initiation represents the initial SOC value of the battery, Δsoc represents the amount of change in SOC during one charge, i.e., the SOC value at the end of charge minus the SOC value at the start of charge, C Electric quantity charged by one-time charging represents the amount of charge during one charge, t represents the charge/discharge start time, t 0 represents the charge/discharge end time, and I (t) represents the discharge current at time t.
The direct current charging electromagnetic compatibility test specifically comprises the following steps:
d1, controlling the insulation monitoring unit to be closed through a charge-discharge electromagnetic compatibility test control module in the industrial control unit.
Specifically, the insulation detection function of the charging pile in the EMC test can be closed by closing the insulation monitoring module through the industrial control unit according to the requirement, so that insulation detection false alarm can be caused by a filter of an EMC darkroom, the charging and discharging are stopped, and the subsequent EMC test cannot be carried out.
D2, inputting a preset charging current value or a preset discharging current value through a charging and discharging electromagnetic compatibility test control module in the industrial control unit.
D3, the charging and discharging electromagnetic compatibility test control module determines an actual power generation value according to a preset charging current value or a preset discharging current value and a protection strategy.
And d4, the charge-discharge control unit sends the current value to the bidirectional AC/DC electric energy conversion unit according to the actual current value, realizes accurate charge-discharge, and performs direct current charge electromagnetic compatibility test.
The invention realizes accurate and safe charge and discharge control through the mutual coordination of the industrial control unit, the charge and discharge control unit and the insulation monitoring unit, ensures that the actual charge and discharge current cannot be excessively damaged to the battery by setting a protection strategy for charge and discharge, realizes automatic recording of communication messages in the charge and discharge process, compares the communication messages with a database to evaluate the communication compatibility between a vehicle and a charging pile, can judge whether a communication flow meets standard regulation and check the accuracy and stability of data transmission, provides a simple and convenient method for estimating the health state of the power battery by analyzing relevant parameters in the charge and discharge communication messages, realizes the accurate control of the charge and discharge current, can meet the requirement of the future EMC standard on current adjustability, can close the insulation monitoring function of the charging pile in EMC test, avoids error messages caused by a filter and ensures the smooth proceeding of the test;
in addition, through the cloud platform, remote monitoring, data analysis and control on the charging and discharging process can be realized, and management and maintenance efficiency is improved.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present application. As used in this specification, the terms "a," "an," "the," and/or "the" are not intended to be limiting, but rather are to be construed as covering the singular and the plural, unless the context clearly dictates otherwise. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method or apparatus comprising such elements.
It should also be noted that the positional or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and the like should be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, or indirectly connected through an intermediary, or may be in communication with the interior of two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not deviate the essence of the corresponding technical solution from the technical solution of the embodiments of the present invention.
Claims (9)
1. The intelligent charge-discharge testing device for the electric automobile is characterized by being suitable for charge-discharge accurate control tests, charge-discharge compatibility evaluation tests, power battery state evaluation tests and direct current charge electromagnetic compatibility test items, and comprises a charge-discharge control unit, a low-voltage power supply unit, a charge-discharge metering unit, a bidirectional AC/DC electric energy conversion unit, an insulation monitoring unit, a switch unit, a charge-discharge connection unit, a message reading unit, a wireless communication unit, an industrial control unit and a cloud platform;
the charging and discharging control unit is used for receiving an instruction issued by the industrial control unit or receiving an instruction issued by the cloud platform through the wireless communication unit, uploading information to the industrial control unit or uploading information to the cloud platform through the wireless communication unit, and acquiring and controlling information of other units connected with the charging and discharging control unit;
the low-voltage power supply unit is connected with the charge-discharge control unit and used for converting the energy of the alternating-current power supply into low-voltage direct-current energy required by the normal operation of the charge-discharge control unit;
the charging and discharging metering unit is connected with the charging and discharging control unit and is used for collecting alternating current input and direct current output electric energy parameters and uploading information to the charging and discharging control unit so as to control output voltage and current;
the bidirectional AC/DC electric energy conversion unit is connected with the charge and discharge control unit and the low-voltage power supply unit and is used for realizing bidirectional AC/DC conversion and realizing charge and discharge;
the insulation monitoring unit is connected with the charge-discharge control unit and the bidirectional AC/DC electric energy conversion unit and is used for realizing insulation monitoring in a charge-discharge process, and a switch or a relay is integrated in the insulation monitoring unit and can be turned on or turned off according to an instruction of the charge-discharge control unit so as to control the insulation monitoring unit to be enabled or turned off;
the switch unit is connected with the charge and discharge control unit and the insulation monitoring unit and is used for communicating or switching off energy transmission;
The charging and discharging connection unit is connected with the charging and discharging control unit and the switch unit and is used for being matched with a charging interface of the electric automobile to realize charging and discharging of the electric automobile;
The message reading unit is connected with the charge-discharge connection unit and the industrial control unit and is used for reading and analyzing the communication message in the charge-discharge process and obtaining parameters in the charge-discharge process and state quantity of the power battery;
the wireless communication unit is connected with the charge and discharge control unit and the cloud platform and is used for realizing communication between the charge and discharge control unit and the cloud platform;
the industrial control unit is connected with the charge and discharge control unit and the cloud platform, and is used for realizing charge and discharge and displaying charge and discharge process information;
The cloud platform is connected with the wireless communication unit and the industrial control unit and is used for acquiring all information in the charging and discharging process and all information acquired by the charging and discharging control unit.
2. The intelligent charge and discharge testing device for the electric automobile according to claim 1, wherein the industrial control unit comprises a charge and discharge control module, a charge and discharge electromagnetic compatibility testing control module, a charge and discharge compatibility diagnosis module and a power battery state evaluation module;
the charging and discharging control module is used for receiving a preset charging and discharging current value, controlling charging and discharging and displaying charging and discharging information;
The charge-discharge electromagnetic compatibility test control module is used for controlling charge-discharge and charge-discharge current, controlling the enabling or closing of the insulation monitoring unit and displaying charge-discharge information;
The charge-discharge compatibility diagnosis module is used for automatically recording communication messages in the charge-discharge process and giving a compatibility diagnosis result according to the communication messages;
And the power battery state evaluation module is used for automatically recording the characterization parameters of the power battery and analyzing the power battery state according to the characterization parameters of the power battery.
3. The intelligent charge and discharge testing device of an electric vehicle according to claim 2, wherein the charge and discharge control module comprises:
The charge and discharge parameter setting submodule is used for setting charge and discharge parameters including a charge and discharge current value and a charge and discharge cut-off SOC;
And the charge and discharge information display sub-module is used for displaying parameters in the charge and discharge process, including charge and discharge voltage, charge and discharge current, battery SOC and power terminal temperature in the charge and discharge connection unit.
4. The intelligent charge-discharge testing device for an electric vehicle according to claim 3, wherein the charge-discharge electromagnetic compatibility testing control module comprises:
the test parameter setting submodule is used for setting charge and discharge current values according to test requirements;
the function control submodule is used for closing or enabling the insulation monitoring unit according to test requirements;
and the charge and discharge information display sub-module is used for displaying parameters in the charge and discharge process.
5. The intelligent charge-discharge testing device of claim 4, wherein the charge-discharge compatibility diagnostic module comprises:
the charge-discharge data processing sub-module is connected with the charge-discharge connection unit through the message reading unit and is used for collecting, recording and analyzing charge-discharge communication messages in real time;
The compatibility analysis submodule is used for analyzing whether the time sequence of the charge-discharge communication message and the message filling content have problems or not and carrying out charge-discharge compatibility analysis;
and the charge and discharge information display sub-module is used for displaying parameters in the charge and discharge process.
6. The intelligent charge and discharge test device for an electric vehicle according to claim 5, wherein the power battery state evaluation module comprises:
the data processing sub-module is connected with the charge-discharge connection unit through the message reading unit and is used for collecting, recording, analyzing and extracting the characterization parameters of the power battery in the charge-discharge communication message in real time and collecting the charge-discharge environment temperature in real time by the temperature collecting unit;
And the state analysis sub-module is embedded with a power battery state analysis model and an algorithm, and performs battery state analysis according to the data acquired by the data processing sub-module.
7. The intelligent charging and discharging test device for the electric automobile according to claim 1, wherein the insulation monitoring unit is kept in an on state in a normal charging and discharging process and is kept in an off state in a direct current charging electromagnetic compatibility test process.
8. The intelligent charging and discharging test device for the electric automobile according to claim 1 is characterized by further comprising a temperature acquisition unit;
the temperature acquisition unit is connected with the charge-discharge control unit and is used for acquiring the charge-discharge ambient temperature working conditions in real time.
9. An intelligent charge and discharge test method for an electric automobile, which is executed by the intelligent charge and discharge test device for an electric automobile according to any one of claims 1 to 8, and is characterized by comprising the following steps:
The accurate control test of charge and discharge specifically comprises the following steps:
Inputting a preset charging current value or a preset discharging current value through a charging and discharging control module in the industrial control unit;
The charge-discharge control module determines an actual lower power generation value according to a preset charge current value or a preset discharge current value and a protection strategy, wherein the protection strategy is to select the minimum value of the preset charge current value or the preset discharge current value, a power battery charge-discharge current demand value and a power battery 1C charge-discharge current value as the actual lower power generation value according to the preset charge current value or the preset discharge current value and the power battery charge-discharge current demand value;
The charge and discharge control unit sends the actual current value to the bidirectional AC/DC electric energy conversion unit according to the actual current value, so as to realize accurate charge and discharge;
The charge-discharge compatibility evaluation test specifically comprises the following steps:
Inserting a charging and discharging connection unit into the vehicle to be tested, and charging or discharging the vehicle to be tested;
the communication message in the charge-discharge process is automatically recorded through a charge-discharge compatibility diagnosis module in the industrial control unit;
Comparing the communication message recorded in the current charge and discharge process with a charge and discharge compatibility database built in the industrial control unit to obtain a compatibility diagnosis result;
The power battery state evaluation test specifically comprises the following steps:
inserting a charge-discharge connection unit into the vehicle to be tested;
recording an initial SOC value before starting charging or discharging by a power battery state evaluation module in the industrial control unit;
charging or discharging the vehicle to be tested for preset time according to the current SOC state of the vehicle to be tested, and recording a cut-off SOC value after stopping charging or discharging;
calculating the health state of the power battery;
the direct current charging electromagnetic compatibility test specifically comprises the following steps:
the insulation monitoring unit is controlled to be closed by a charge-discharge electromagnetic compatibility test control module in the industrial control unit;
inputting a preset charging current value or a preset discharging current value through a charging and discharging electromagnetic compatibility test control module in the industrial control unit;
the charge-discharge electromagnetic compatibility test control module determines an actual lower power generation value according to a preset charge current value or a preset discharge current value and a protection strategy;
And the charge-discharge control unit sends the actual current value to the bidirectional AC/DC electric energy conversion unit according to the actual current value, realizes accurate charge-discharge, and performs direct current charge electromagnetic compatibility test.
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| CN202411303212.7A CN118818197B (en) | 2024-09-19 | 2024-09-19 | An intelligent charging and discharging test device and method for electric vehicles |
| JP2025028863A JP7734292B1 (en) | 2024-09-19 | 2025-02-26 | Intelligent charging/discharging test device and method for electric vehicles |
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|---|---|---|---|---|
| CN110058172A (en) * | 2019-05-08 | 2019-07-26 | 广西城市职业学院 | New-energy automobile power battery electromagnetic compatibility detection method |
| CN110661441A (en) * | 2018-06-28 | 2020-01-07 | 比亚迪汽车工业有限公司 | Electric automobile and motor controller for electric automobile |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2005026C2 (en) * | 2010-07-05 | 2012-01-09 | Epyon B V | Charger for a battery, plurality of coupled chargers and method of operating. |
| JP5498414B2 (en) * | 2011-02-28 | 2014-05-21 | 株式会社東芝 | Test apparatus and battery pack test method |
| CN104253471B (en) * | 2013-06-28 | 2017-02-22 | 比亚迪股份有限公司 | Charging system and charging control method of electric vehicle |
| WO2017155260A1 (en) * | 2016-03-07 | 2017-09-14 | 주식회사 엘지화학 | Charging/discharging current estimation device |
| US10705152B1 (en) * | 2019-06-05 | 2020-07-07 | Xilectric, Inc. | Systems and apparatus of cyclic coulometry |
| JP2021040401A (en) * | 2019-09-02 | 2021-03-11 | パナソニックＩｐマネジメント株式会社 | Power conversion systems, cable supports, and power converters |
| CN213813807U (en) * | 2020-11-27 | 2021-07-27 | 一汽解放汽车有限公司 | An electromagnetic compatibility test system for high-voltage system components in automobiles |
| JP2022146593A (en) * | 2021-03-22 | 2022-10-05 | パナソニックＩｐマネジメント株式会社 | Power conversion system and vehicle connection device |
| KR20230093475A (en) * | 2021-09-08 | 2023-06-27 | 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 | Power battery charging method and battery management system |
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|---|---|---|---|---|
| CN110661441A (en) * | 2018-06-28 | 2020-01-07 | 比亚迪汽车工业有限公司 | Electric automobile and motor controller for electric automobile |
| CN110058172A (en) * | 2019-05-08 | 2019-07-26 | 广西城市职业学院 | New-energy automobile power battery electromagnetic compatibility detection method |
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