CN110736950A - Online testing system and method for battery management system - Google Patents
Online testing system and method for battery management system Download PDFInfo
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- CN110736950A CN110736950A CN201910999123.3A CN201910999123A CN110736950A CN 110736950 A CN110736950 A CN 110736950A CN 201910999123 A CN201910999123 A CN 201910999123A CN 110736950 A CN110736950 A CN 110736950A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
- Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
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- Y—GENERAL 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
- Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
- Y04S30/12—Remote or cooperative charging
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Abstract
The invention discloses an battery management system online test system and a method thereof, the system comprises a battery management system test tool used for being in test connection with a battery management system, a direct current stabilized voltage power supply used for providing charging current for the battery management system, an electronic load used for supplying discharge for the battery management system, a burner used for programming a program for the battery management system, an electric heating jacket used for heating a temperature sensing module in the battery management system, an upper computer connected with the battery management system test tool through a serial port module, and the upper computer sending a test instruction to the battery management system test tool so that the battery management system reports parameter information collected by the battery management system to the upper computer according to a preset period, and after receiving the parameter information, the upper computer displays the parameter information in real time and determines abnormal parameter information, sends a corresponding calibration instruction to the battery management system test tool so as to calibrate the battery management system.
Description
Technical Field
The invention relates to the technical field of battery management system testing, in particular to an battery management system online testing system and method.
Background
The battery management system detects parameters such as voltage, total voltage, temperature, charging current, discharging current, SOC (state of charge) and the like of each string of the power battery, and when parameters are abnormal, the battery management system protects and balances to ensure the service life and normal use of a battery cell.
At present, the test of the power management system is to display the collected data of the battery management system through an upper computer to determine whether the battery management system works normally, however, when the battery management system is abnormal, the collected data is not accurate, and thus the test output result is not accurate.
Disclosure of Invention
The invention mainly aims to provide an battery management system online test method, aiming at improving the test accuracy.
In order to achieve the above object, the present invention provides kinds of online testing systems for battery management systems, including:
the battery management system testing tool is used for testing connection with a battery management system, and the battery management system is connected with a battery;
the direct-current stabilized voltage supply is connected with the battery management system testing tool and used for providing charging current for the battery management system so as to charge the battery;
the electronic load is connected with the battery management system testing tool and used for discharging the battery connected with the battery management system;
the recorder is connected with the battery management system test tool and used for programming a program for the battery management system;
the electric heating sleeve is connected with the battery management system testing tool and used for heating a temperature sensing module in the battery management system;
the upper computer is connected with the battery management system testing tool through a serial port module;
the upper computer is used for sending a test instruction to the battery management system test tool so that the battery management system reports the parameter information acquired by the battery management system to the upper computer according to a preset period, the upper computer displays the parameter information in real time after receiving the parameter information, and sends a corresponding calibration instruction to the battery management system test tool after determining abnormal parameter information so as to calibrate the battery management system; the parameter information comprises the voltage of a single battery, the total voltage of the battery, the charging current of the battery, the discharging current of the battery, the temperature of the battery, the capacity of the battery, the health information of the battery and the equipment number of a battery management system.
In an embodiment, the upper computer is configured to send an equipment number change command to the battery management system test fixture, so as to change a built-in number of the battery management system.
In an embodiment, the upper computer is configured to obtain a total battery voltage collected by the battery management system and received by the battery management system test fixture, perform a difference calculation on the total battery voltage and a preset voltage value, and send a total voltage calibration command to the battery management system test fixture when a calculated difference result is greater than a preset value.
In an embodiment, the upper computer is configured to obtain a battery temperature collected by a temperature sensing module in the battery management system, which is received by the battery management system test fixture, perform difference calculation on the battery temperature and a preset temperature value, and send a temperature calibration command to the battery management system test fixture when a difference result obtained by the difference calculation is greater than a preset value.
In an embodiment, the upper computer is configured to obtain a battery current collected by the battery management system through the battery management system test fixture, determine that the collected battery current is a battery charging current when the battery current is positive, determine that the collected battery current is a battery discharging current when the battery current is negative, perform difference calculation on the battery charging current or the battery discharging current and a preset current threshold, and send a current calibration command to the battery management system test fixture when the difference between the battery charging current or the battery discharging current and the preset current threshold is greater than a preset current value.
In an embodiment, the upper computer has an input interface, the input interface has a balancing input instruction unit and a battery string number setting unit, and the upper computer is configured to set a battery string number to be balanced through the battery string number setting unit, trigger a balancing start command through the balancing input instruction unit, and send the command to the battery management system through the battery management system test tool to perform balancing adjustment on the battery.
In an embodiment, the upper computer is configured to output a control signal to the battery management system testing tool, control the electric jacket to heat the temperature sensing module in the battery management system, and detect whether the battery management system performs a protection operation and whether the temperature sensing module is normal when the temperature detected by the temperature sensing module reaches a set temperature.
In addition, the invention also provides battery management system online test methods, which are applied to a battery management system online test system, the battery management system online test system comprises a battery management system test tool for test connection with the battery management system, a direct current stabilized voltage power supply, an electronic load, a burner, an electric heating jacket, a serial port module and an upper computer connected with the serial port module, the direct current stabilized voltage power supply is used for providing charging current for a battery connected with the battery management system, the electronic load is used for discharging the battery connected with the battery management system, the electric heating jacket is used for heating a temperature sensing module in the battery management system, and the battery management system online test method comprises the following steps:
accessing a battery management system to be tested into a battery tool and a battery management system testing tool;
the upper computer sends a test instruction to the battery management system test tool, so that the battery management system reports the parameter information acquired by the battery management system to the upper computer according to a preset period;
after receiving the parameter information, the upper computer displays the parameter information in real time; the parameter information comprises single battery voltage, total battery voltage, battery charging current, battery discharging current, battery temperature, battery capacity, battery health information and equipment number of a battery management system;
the upper computer sends an equipment number changing command to the battery management system testing tool to change the built-in number of the battery management system;
the upper computer obtains the total voltage of the battery collected by the battery management system and received by the battery management system testing tool, calculates the difference between the total voltage of the battery and a preset voltage value, and sends a total voltage calibration command to the battery management system testing tool when the calculated difference result is greater than the preset value;
the upper computer obtains the battery temperature collected by a temperature sensing module in the battery management system received by the battery management system testing tool, calculates the difference between the battery temperature and a preset temperature value, and sends a temperature calibration command to the battery management system testing tool when the calculated difference result is greater than the preset value;
the upper computer obtains battery current collected by a battery management system through a battery management system testing tool, determines the collected battery current as battery charging current when the battery current is positive, determines the collected battery current as battery discharging current when the battery current is negative, calculates the difference value between the battery charging current or the battery discharging current and a preset current threshold value, and sends a current calibration command to the battery management system testing tool when the difference value between the battery charging current or the battery discharging current and the preset current threshold value is larger than the preset current value;
the upper computer sets the number of the battery strings to be balanced, triggers a balance starting command, and sends the command to a battery management system through a battery management system test tool to perform balance adjustment on the battery;
the upper computer is used for setting the number of the battery strings to be balanced through the battery string number setting unit, triggering a balance starting command through the balance input instruction unit, sending the command to the battery management system through the battery management system testing tool and carrying out balance adjustment on the battery;
and the upper computer sends a test ending command to the battery management system test tool so that the battery management system stops sending the acquired data periodically.
In the technical scheme of the invention, the upper computer can send the test instruction to the battery management system test tool, so that the battery management system reports the parameter information acquired by the battery management system to the upper computer according to a preset period, the upper computer displays the parameter information in real time after receiving the parameter information, determines abnormal parameter information, and sends the corresponding calibration instruction to the battery management system test tool to calibrate the battery management system, the battery management system automatically calibrates, and the parameter information output after calibration is more accurate, so that the test accuracy is improved, and the system reliability 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 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a functional block diagram of an on-line test of a battery management system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an on-line testing method of the battery management system according to an embodiment of the present invention.
The objects, features, and advantages of the present invention are further described in with reference to the accompanying drawings.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The invention provides an battery management system online test system.
Referring to fig. 1, in an embodiment of the present invention, an online testing system for a battery management system includes:
the battery management system testing tool 10 is used for testing connection with a battery management system, and the battery management system is connected with a battery; the battery management system test tool 10 specifically leads out each test point of the battery management system, is convenient for testing, and can be internally provided with a high-precision resistor in series connection for connecting each string of voltage of the battery management system simulation battery;
the direct-current stabilized voltage power supply 20 is connected with the battery management system testing tool 10 and used for providing charging current for the battery management system so as to charge the battery;
the electronic load 30 is connected with the battery management system testing tool 10 and used for discharging the battery connected with the battery management system;
the burner 40 is connected with the battery management system testing tool 10 and used for programming a program for the battery management system; during testing, the battery management system can be put into the battery tool, and the MCU control module of the battery management system is connected with the programming device 40 to program.
The electric heating jacket 50 is connected with the battery management system testing tool 10 and used for heating a temperature sensing module in the battery management system;
the upper computer 60 is connected with the battery management system testing tool 10 through a serial port module 70;
the upper computer 60 is configured to send a test instruction to the battery management system test tool 10, so that the battery management system reports parameter information acquired by the battery management system to the upper computer 60 according to a preset period, the upper computer 60 displays the parameter information in real time after receiving the parameter information, and sends a corresponding calibration instruction to the battery management system test tool 10 after determining abnormal parameter information, so as to calibrate the battery management system; in this embodiment, the upper computer 60 has a display screen and a display interface to display parameter information, so as to conveniently monitor and confirm whether the battery management system is normal. The parameter information comprises single battery voltage, total battery voltage, battery charging current, battery discharging current, battery temperature, battery capacity, battery health information and equipment number of a battery management system.
The upper computer 60 sends a test starting command, after the battery management system MCU control module receives the test starting command, the cell voltage, the total voltage, the current, the temperature, the SOC (battery capacity), the SOH (battery health) and the equipment number of the battery management system collected by each module of the battery management system are periodically sent, the data sent by the battery management system are received by the upper computer 60 to be analyzed and converted, and the data can be displayed in a fixed area of the upper computer 60, so that various collected parameter information of the battery management system can be monitored in real time.
In this embodiment, after the upper computer 60 receives the parameter information, the parameter information is displayed in real time, abnormal parameter information is determined, and then a corresponding calibration instruction is sent to the battery management system test tool 10, so as to calibrate the battery management system, the battery management system performs automatic calibration, and the parameter information output after calibration is more accurate, so that the accuracy of the test is improved, the reliability of the system is improved, and the test of the relevant performance of the battery management system is realized through the operation of the upper computer 60, which is very convenient and fast.
In the embodiment, the host computer 60 is configured to send a device number change command to the battery management system test tool 10 to change the internal number of the battery management system, send a device number change command to change the internal number of the battery management system, where each battery management system has a fixed number and can change the name of the battery management system device with a wireless connection for distinguishing, searching and connecting.
In embodiment, the upper computer 60 is configured to obtain a total battery voltage collected by the battery management system and received by the battery management system test fixture 10, perform a difference calculation between the total battery voltage and a preset voltage value, and send a total voltage calibration command to the battery management system test fixture 10 when a difference result obtained by the difference calculation is greater than a preset value, where the battery management system test fixture 10 provides fixed voltage values for the battery management system to supply power to the battery management system and sample the battery management system, the upper computer 60 may input a preset voltage value in advance, compare the preset voltage value with the preset voltage value when the upper computer 60 receives and displays data of the battery management system, send the total voltage calibration command when a difference between the preset voltage value and the preset voltage value is exceeded, and not send the total voltage calibration command if the difference is smaller than the preset value.
In an embodiment, the upper computer 60 is configured to obtain a battery temperature collected by a temperature sensing module in the battery management system, which is received by the battery management system testing tool 10, perform difference calculation on the battery temperature and a preset temperature value, and send a temperature calibration command to the battery management system testing tool 10 when a calculated difference result is greater than a preset value, so that the battery management system can perform self-calibration on temperature detection, and a final output detection result is accurate.
In an embodiment, the upper computer 60 is configured to obtain a battery current collected by the battery management system through the battery management system test fixture 10, determine that the collected battery current is a battery charging current when the battery current is positive, determine that the collected battery current is a battery discharging current when the battery current is negative, perform difference calculation on the battery charging current or the battery discharging current and a preset current threshold, and send a current calibration command to the battery management system test fixture 10 when the difference between the battery charging current or the battery discharging current and the preset current threshold is greater than a preset current value.
Two current input areas are arranged beside a current display area on a display interface of the upper computer 60, charging currents are discharging currents, the direct current stabilized power supply 20, the electronic load 30 and the upper computer 60 input well-defined values in a charging and discharging mode, when the direct current stabilized power supply 20 or the electronic load 30 is turned on, the battery management system collects the currents and transmits the currents to the upper computer 60, the upper computer 60 displays the currents, the difference value of the positive and negative currents (positive charging and negative discharging) is judged, the upper computer 60 sends a current calibration command when the difference value of the two input currents exceeds an expected value, and the current calibration command is not sent if the difference value is smaller than an expected value.
In the embodiment, the upper computer 60 has an input interface, the input interface has a balancing input instruction unit and a battery string number setting unit, the upper computer 60 is configured to set the number of battery strings to be balanced through the battery string number setting unit, trigger a balancing start command through the balancing input instruction unit, send the balancing start command to the battery management system through the battery management system test tool 10, and perform balancing adjustment on the battery, the upper computer 60 can input numbers at a balancing command position of the display interface, so as to correspond to the number of the relevant battery strings, and after sending the balancing command, it can be observed that a corresponding string number balancing start indicator lamp in a balancing module of the battery management system is turned on, where the command is to set the balancing start command for detecting whether the balancing function is normal or not because the balancing function condition is difficult to achieve.
In embodiment, the host computer 60 is configured to output a control signal to the battery management system testing tool 10, control the electric heating jacket 50 to heat the temperature sensing module in the battery management system, detect whether the battery management system performs a protection operation and detect whether the temperature sensing module is normal when the temperature detected by the temperature sensing module reaches a set temperature, heat the temperature sensing module in the battery management system using the electric heating jacket 50, observe the temperature displayed by the host computer 60, check whether the dc voltage regulator 20 is disconnected from charging or the electronic load 30 is disconnected from discharging when the temperature reaches a programmed set temperature, and detect whether the battery management system has a protection operation and whether the temperature sensing module is normal when the battery management system detects data abnormality, so as to ensure normal use and safety of the battery pack.
In addition, referring to fig. 1 and 2, the invention further provides online testing methods for a battery management system, which are applied to an online testing system for the battery management system, and the online testing system for the battery management system comprises a battery management system testing tool 10 for testing connection with the battery management system, a direct current stabilized power supply 20, an electronic load 30, a burner 40, an electric heating jacket 50, a serial port module 70 and an upper computer 60 connected with the serial port module 70, wherein the battery management system is connected with a battery, the direct current stabilized power supply 20 is connected with the battery management system testing tool 10 and used for supplying charging current to the battery management system to charge the battery, the electronic load 30 is connected with the battery management system testing tool 10 and used for discharging the battery connected with the battery management system, the burner 40 is connected with the battery management system testing tool 10 and used for programming a program for the battery management system, and during testing, the battery management system can be put into the battery tool and connected with an MCU control module of the battery management system through the burner 40 to program the electric heating jacket 50 and used for heating the battery management system.
In an embodiment of the present invention, the method for online testing of a battery management system includes:
step S10, a battery management system to be tested is accessed into a battery tool and a battery management system test tool; in this embodiment, the battery management system test fixture specifically draws out each test point of the battery management system, facilitates the test, and may have a high-precision resistor connected in series for connecting to each string voltage of the battery management system simulation battery.
Step S20, the upper computer sends a test instruction to the battery management system test tool, so that the battery management system reports the parameter information acquired by the battery management system to the upper computer according to a preset period;
step S30, after the upper computer receives the parameter information, the parameter information is displayed in real time; the parameter information comprises single battery voltage, total battery voltage, battery charging current, battery discharging current, battery temperature, battery capacity, battery health information and equipment number of a battery management system;
in this embodiment, the host computer has display screen and display interface, shows parameter information to whether convenient control and affirmation battery management system is normal. The parameter information comprises single battery voltage, total battery voltage, battery charging current, battery discharging current, battery temperature, battery capacity, battery health information and equipment number of a battery management system. The upper computer sends a test starting command, after the battery management system MCU control module receives the test starting command, the MCU control module can periodically send the monomer voltage, the total voltage, the current, the temperature, the SOC (battery capacity), the SOH (battery health) and the equipment number of the battery management system, the upper computer receives the data sent by the battery management system to analyze and convert, and the data can be displayed in a fixed area of the upper computer, so that various collected parameter information of the battery management system can be monitored in real time.
S40, the upper computer sends an equipment number changing command to the battery management system testing tool to change the built-in number of the battery management system; and sending an equipment number change command, changing the built-in number of the battery management system, wherein each battery management system has a fixed number, and can change the name of the battery management system equipment with wireless connection for distinguishing, searching and connecting.
And S50, the upper computer obtains the total voltage of the battery collected by the battery management system and received by the battery management system test tool, calculates the difference between the total voltage of the battery and a preset voltage value, and sends a total voltage calibration command to the battery management system test tool when the calculated difference result is greater than the preset value, the battery management system test tool provides fixed voltage values for the battery management system to supply power and sample the battery management system, the upper computer can input the set voltage value in advance, compares the set voltage value after receiving and displaying the data of the battery management system, sends the total voltage calibration command when the difference value exceeds the expected value, and does not send the total voltage calibration command if the difference value is smaller than the expected value.
Step S60, the upper computer obtains the battery temperature collected by a temperature sensing module in the battery management system and received by the battery management system testing tool, calculates the difference between the battery temperature and a preset temperature value, and sends a temperature calibration command to the battery management system testing tool when the calculated difference result is larger than the preset value; therefore, the battery management system can automatically calibrate the temperature detection, so that the finally output detection result is accurate.
The method comprises the steps that S70, an upper computer obtains battery current collected by a battery management system through a battery management system testing tool, when the battery current is positive, the collected battery current is determined to be battery charging current, when the battery current is negative, the collected battery current is determined to be battery discharging current, difference calculation is conducted on the battery charging current or the battery discharging current and a preset current threshold, when the difference between the battery charging current or the battery discharging current and the preset current threshold is larger than the preset current value, a current calibration command is sent to the battery management system testing tool, two current input areas are arranged beside a current display area on a display interface of the upper computer, charging currents are discharging currents, the charging and discharging of a direct current stabilized power supply, an electronic load and the upper computer input well-defined values, when the direct current stabilized power supply or the electronic load is opened, the battery management system collects the current to be transmitted to the upper computer, the upper computer displays the current, after the comparison of the input difference values is judged, when the difference exceeds the expected value, the upper computer sends the current calibration command, and if the difference is smaller than the expected current calibration command is not sent.
Step S80, the upper computer sets the number of battery strings to be balanced, triggers a balance starting command, sends the command to a battery management system through a battery management system test tool, and performs current balance adjustment on the battery; the balancing command of the upper computer display interface can input numbers corresponding to the number of the related battery strings, and after the balancing command is sent, the balancing start indicating lamp of the battery corresponding to the number of the battery strings in the balancing module of the battery management system can be observed to be turned on.
And S90, outputting a control signal to a battery management system testing tool by the upper computer, controlling the electric heating jacket to heat the temperature sensing module in the battery management system, and detecting whether the battery management system executes a protection action and whether the temperature sensing module is normal or not when the temperature detected by the temperature sensing module reaches a set temperature. The temperature sensing module in the battery management system is heated by the electric heating sleeve, the temperature displayed by the upper computer is observed, when the temperature reaches the program set temperature, whether the direct-current voltage-stabilized power supply is disconnected for charging or whether the electronic load is disconnected for discharging is checked, and when the battery management system detects that the data is abnormal, no protection action exists and the temperature sensing module is normal, so that the normal use and the safety of the battery pack are ensured.
The temperature sensing module in the battery management system is heated by the electric heating sleeve, the temperature displayed by the upper computer is observed, when the temperature reaches the program set temperature, whether the direct-current voltage-stabilized power supply is disconnected for charging or whether the electronic load is disconnected for discharging is checked, and when the battery management system detects that the data is abnormal, no protection action exists and the temperature sensing module is normal, so that the normal use and the safety of the battery pack are ensured.
And S100, the upper computer sends a test ending command to the battery management system test tool, and the battery management system stops sending the collected data periodically. After the test, can through host computer control battery management system test fixture and battery management system stop work, it is very convenient, swift, save the power moreover, avoid direct disconnection power to cause the program to run away the scheduling problem.
In the embodiment, after the upper computer receives the parameter information, the parameter information is displayed in real time, abnormal parameter information is determined, and then a corresponding calibration instruction is sent to the battery management system test tool to calibrate the battery management system, the battery management system performs automatic calibration, and the parameter information output after calibration is more accurate, so that the test accuracy is improved, and the system reliability is improved.
Claims (8)
1, kinds of battery management system online test system, characterized in that, the battery management system online test system includes:
the battery management system testing tool is used for testing connection with a battery management system, and the battery management system is connected with a battery;
the direct-current stabilized voltage supply is connected with the battery management system testing tool and used for providing charging current for the battery management system so as to charge the battery;
the electronic load is connected with the battery management system testing tool and used for discharging the battery connected with the battery management system;
the recorder is connected with the battery management system test tool and used for programming a program for the battery management system;
the electric heating sleeve is connected with the battery management system testing tool and used for heating a temperature sensing module in the battery management system;
the upper computer is connected with the battery management system testing tool through a serial port module;
the upper computer is used for sending a test instruction to the battery management system test tool so that the battery management system reports the parameter information acquired by the battery management system to the upper computer according to a preset period, the upper computer displays the parameter information in real time after receiving the parameter information, and sends a corresponding calibration instruction to the battery management system test tool after determining abnormal parameter information so as to calibrate the battery management system; the parameter information comprises the voltage of a single battery, the total voltage of the battery, the charging current of the battery, the discharging current of the battery, the temperature of the battery, the capacity of the battery, the health information of the battery and the equipment number of a battery management system.
2. The online battery management system testing system of claim 1, wherein the host computer is configured to send an equipment number change command to the battery management system testing tool to change a built-in number of the battery management system.
3. The online testing system of claim 1, wherein the upper computer is configured to obtain a total battery voltage collected by the battery management system and received by the battery management system testing tool, perform a difference calculation between the total battery voltage and a preset voltage value, and send a total voltage calibration command to the battery management system testing tool when the calculated difference result is greater than the preset value.
4. The online testing system of claim 1, wherein the upper computer is configured to obtain a battery temperature collected by a temperature sensing module in the battery management system, the battery temperature being received by the battery management system testing tool, calculate a difference between the battery temperature and a preset temperature value, and send a temperature calibration command to the battery management system testing tool when the calculated difference is greater than the preset value.
5. The online testing system of claim 1, wherein the upper computer is configured to obtain a battery current collected by the battery management system through the testing tool of the battery management system, determine that the collected battery current is a battery charging current when the battery current is positive, determine that the collected battery current is a battery discharging current when the battery current is negative, perform difference calculation on the battery charging current or the battery discharging current and a preset current threshold, and send a current calibration command to the testing tool of the battery management system when a difference between the battery charging current or the battery discharging current and the preset current threshold is greater than a preset current value.
6. The online test system for the battery management system according to claim 1, wherein the upper computer is provided with an input interface, the input interface is provided with a balance input instruction unit and a battery string number setting unit, and the upper computer is configured to set a battery string number to be balanced through the battery string number setting unit, trigger a balance start command through the balance input instruction unit, and send the command to the battery management system through a battery management system test tool to perform balance adjustment on the battery.
7. The online testing system of claim 1, wherein the upper computer is configured to output a control signal to the testing tool of the battery management system, control the electric heating jacket to heat the temperature sensing module in the battery management system, and detect whether the battery management system performs a protection operation and whether the temperature sensing module is normal when the temperature detected by the temperature sensing module reaches a set temperature.
The battery management system online test method is applied to a battery management system online test system, and is characterized in that the battery management system online test system comprises a battery management system test tool for test connection with a battery management system, a direct current stabilized voltage power supply, an electronic load, a burner, an electric heating jacket, a serial port module and an upper computer connected with the serial port module, wherein the direct current stabilized voltage power supply is used for providing charging current for a battery connected with the battery management system, the electronic load is used for discharging the battery connected with the battery management system, the electric heating jacket is used for heating a temperature sensing module in the battery management system, and the battery management system online test method comprises the following steps:
accessing a battery management system to be tested into a battery tool and a battery management system testing tool;
the upper computer sends a test instruction to the battery management system test tool, so that the battery management system reports the parameter information acquired by the battery management system to the upper computer according to a preset period;
after receiving the parameter information, the upper computer displays the parameter information in real time; the parameter information comprises single battery voltage, total battery voltage, battery charging current, battery discharging current, battery temperature, battery capacity, battery health information and equipment number of a battery management system;
the upper computer sends an equipment number changing command to the battery management system testing tool to change the built-in number of the battery management system;
the upper computer obtains the total voltage of the battery collected by the battery management system and received by the battery management system testing tool, calculates the difference between the total voltage of the battery and a preset voltage value, and sends a total voltage calibration command to the battery management system testing tool when the calculated difference result is greater than the preset value;
the upper computer obtains the battery temperature collected by a temperature sensing module in the battery management system received by the battery management system testing tool, calculates the difference between the battery temperature and a preset temperature value, and sends a temperature calibration command to the battery management system testing tool when the calculated difference result is greater than the preset value;
the upper computer obtains battery current collected by a battery management system through a battery management system testing tool, determines the collected battery current as battery charging current when the battery current is positive, determines the collected battery current as battery discharging current when the battery current is negative, calculates the difference value between the battery charging current or the battery discharging current and a preset current threshold value, and sends a current calibration command to the battery management system testing tool when the difference value between the battery charging current or the battery discharging current and the preset current threshold value is larger than the preset current value;
the upper computer sets the number of the battery strings to be balanced, triggers a balance starting command, and sends the command to a battery management system through a battery management system test tool to perform balance adjustment on the battery;
the upper computer is used for setting the number of the battery strings to be balanced through the battery string number setting unit, triggering a balance starting command through the balance input instruction unit, sending the command to the battery management system through the battery management system testing tool and carrying out balance adjustment on the battery;
and the upper computer sends a test ending command to the battery management system test tool so that the battery management system stops sending the acquired data periodically.
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