CN112649682A - Detection system and method for battery distribution box of electric vehicle - Google Patents
Detection system and method for battery distribution box of electric vehicle Download PDFInfo
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- CN112649682A CN112649682A CN202010933028.6A CN202010933028A CN112649682A CN 112649682 A CN112649682 A CN 112649682A CN 202010933028 A CN202010933028 A CN 202010933028A CN 112649682 A CN112649682 A CN 112649682A
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Abstract
The invention discloses a system and a method for detecting a battery distribution box of an electric automobile, relates to the technical field of detection of the battery distribution box of the electric automobile, and aims to solve the problems that the existing battery system distribution box is mostly manually or semi-automatically detected when leaving a factory, the detection time is long, the detection reliability is low, and the traceability is poor. The invention uses the program control voltage source module to simulate the battery system, uses the program control current source module to simulate the driving current, uses the detection circuit board module to carry out simulation control and feedback detection on each electrical unit of the distribution box, and uses the PC upper computer to carry out communication interaction and detection flow control with each module.
Description
Technical Field
The invention relates to the technical field of detection of a distribution box of an electric vehicle battery system, in particular to a system and a method for detecting a distribution box of an electric vehicle battery.
Background
The battery system provides a power source for the electric automobile, and the battery system distribution box is a distribution and switching unit of the power output of the battery system and plays an important role in the whole battery system.
Once a distribution box breaks down, safety risks are caused to a finished automobile, so that the battery system distribution box needs to be subjected to strict test and inspection when leaving a factory, the conventional detection method is mostly manual or semi-automatic detection, the detection time is long, the detection reliability is low, and the traceability is poor, and therefore the system and the method for detecting the battery distribution box of the electric automobile are provided.
Disclosure of Invention
The invention provides a detection system and a detection method for a battery distribution box of an electric automobile, which solve the problems that the existing battery distribution box of the battery system is mostly detected manually or semi-automatically when leaving a factory, the detection time is long, the detection reliability is low, and the traceability is poor.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an electric automobile battery block terminal detecting system, includes a battery system block terminal, a programme-controlled voltage source, a programme-controlled current source, a detection circuitry and a set of PC host computer communication system, battery system block terminal includes pre-charge relay, pre-charge resistance, total positive relay, heating fuse, quick charge relay, total negative relay and current hall sensor, all be equipped with test point 1, test point 2, test point 3, test point 4, test point 5, test point 6, test point 7, test point 8, test point 9, current acquisition point, pre-charge relay control, total positive relay control, heating relay control, quick charge relay control and total negative relay control on battery system block terminal and the detection circuitry, the detection circuitry includes resistance voltage division module, pre-charge resistance voltage division module, The device comprises an ADC1 voltage sampling module, an ADC2 voltage sampling module, a current conditioning module, a relay control module, a CAN communication module and an MCU module.
Preferably, the heating relay is electrically connected with the heating fuse through a wire, and the total negative relay is also electrically connected with the current hall sensor through a wire.
A detection method for a battery distribution box of an electric automobile comprises the following steps:
s1: the testing point 1 of the input end of the distribution box detection system is connected with the positive pole of a program-controlled voltage source, the testing point 7 is connected with the negative pole of the program-controlled voltage source, the testing point 8 on the left side of the current Hall sensor is connected with the negative pole of the program-controlled current source, and the testing point 9 on the right side is connected with the positive pole of the program-controlled current source;
s2: the distribution box test point 1 is connected with the detection circuit board test point 1, the distribution box test point 2 is connected with the detection circuit board test point 2, the distribution box test point 3 is connected with the detection circuit board test point 3, the distribution box test point 4 is connected with the detection circuit board test point 4, the distribution box test point 5 is connected with the detection circuit board test point 5, the distribution box test point 6 is connected with the detection circuit board test point 6, the distribution box test point 7 is connected with the detection circuit board test point 7, the distribution box test point 8 is connected with the detection circuit board test point 8, the distribution box current collection point is connected with the detection circuit board current collection point, the distribution box pre-charging relay is controlled to be connected with the detection circuit board pre-charging relay control, the distribution box is controlled to be connected with the detection circuit board heating relay control, the distribution box, the distribution box total negative relay control is connected with the detection circuit board total negative relay control;
s3: starting an upper computer, controlling the program-controlled voltage source to output 100V, and measuring the input voltage Vbat of the test point 1 to the test point 7 through the detection circuit board;
s4: measuring the voltage Vpre of the test point 2 to the test point 7, measuring the voltage Vpos of the test point 3 to the test point 7, reporting the adhesion fault of the pre-charging or total positive relay if the Vpre is more than or equal to 0.9Vbat or the Vpos is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, go to S5;
s5: measuring the voltage Vheat of the test point 4 to the test point 7, if the voltage Vheat is more than or equal to 0.9Vbat, reporting the adhesion fault of the heating relay, recording the fault, and ending the test; otherwise, go to S6;
s6: measuring the voltage Vqchg of the test point 6 to the test point 7, reporting the adhesion fault of the quick charging relay if the Vqchg is more than or equal to 0.9Vbat, recording the fault, and finishing the test; otherwise, go to S7;
s7: measuring the voltage Vneg of the test point 1 to the test point 8, if the Vneg is more than or equal to 0.9Vbat, reporting the adhesion fault of the total negative relay, recording the fault, and ending the test; otherwise, go to S8;
s8: closing the pre-charging relay, measuring Vpre, reporting the closing fault of the pre-charging relay if the Vpre is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, measuring Vpos, reporting a pre-charging resistance fault if Vpos is less than or equal to 0.45Vbat or Vpos is more than or equal to 0.55Vbat, recording the fault, and ending the test; otherwise, disconnecting the pre-charging relay, measuring Vpre, reporting the disconnection fault of the pre-charging relay if the Vpre is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, go to S9;
s9: closing the total positive relay, measuring Vpos, reporting the closing fault of the total positive relay if the Vpos is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, disconnecting the main positive relay, measuring Vpos, reporting the disconnection fault of the main positive relay if the Vpos is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, go to S10;
s10: closing the heating relay, measuring Vheat, reporting the closing fault of the heating relay if Vheat is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, measuring the voltage Vuse of the test point 5 to the test point 7, if the Vuse is less than or equal to 0.6Vbat, reporting the fault of the heating fuse, recording the fault, and ending the test; otherwise, the heating relay is disconnected, Vheat is measured, if Vheat is more than or equal to 0.9Vbat, the disconnection fault of the heating relay is reported, the fault is recorded, and the test is finished; otherwise, go to S11;
s11: closing the quick charging relay, measuring Vqchg, reporting a closing fault of the quick charging relay if the Vqchg is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, disconnecting the quick charge relay, measuring Vqchg, reporting the disconnection fault of the quick charge relay if the Vqchg is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, entering 12;
s12: closing the total negative relay, measuring Vneg, reporting the closing fault of the total negative relay if the Vneg is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, disconnecting the total negative relay, measuring Vneg, reporting the disconnection fault of the total negative relay if the Vneg is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, go to S13;
s13: setting the program-controlled current source output 100A, measuring loop current Icur of a test point 8 and a test point 9, reporting a fault of the current Hall sensor if the Icur is more than or equal to 101A or the Icur is less than or equal to 99A, recording the fault, and ending the test; otherwise, the test is finished.
Preferably, the current collecting point feeds back a signal to the MCU module through the current conditioning module.
Preferably, the test point 1, the test point 2, the test point 3, the test point 4, the test point 5, the test point 6 and the test point 7 feed back signals to the MCU module through the ADC1 voltage sampling module.
Preferably, the test point 1 and the test point 8 feed back signals to the MCU module through the ADC2 voltage sampling module.
Compared with the prior art, the invention has the beneficial effects that: according to the characteristics of the distribution box of the electric automobile, the battery system is simulated by using the program-controlled voltage source module, the driving current is simulated by using the program-controlled current source module, the simulation control and feedback detection are performed on each electric unit of the distribution box by using the detection circuit board module, and the communication interaction and detection flow control are performed between the PC upper computer and each module.
Drawings
FIG. 1 is an electrical schematic of the battery system distribution box of the present invention;
FIG. 2 is a schematic diagram of test point locations for a battery system distribution box detection system of the present invention;
FIG. 3 is a schematic diagram of the voltage source and current source access of the battery system distribution box detection system of the present invention;
FIG. 4 is a schematic diagram illustrating the testing principle of the testing system of the battery system distribution box of the present invention;
fig. 5 is a schematic diagram of a detection process of the detection system of the battery system distribution box according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-5, a detection system for a battery distribution box of an electric vehicle comprises a battery system distribution box, a programmable voltage source, a programmable current source, a detection circuit board and a set of PC upper computer communication system, wherein the battery system distribution box comprises a pre-charging relay, a pre-charging resistor, a total positive relay, a heating fuse, a fast-charging relay, a total negative relay and a current Hall sensor, the battery system distribution box and the detection circuit board are respectively provided with a test point 1, a test point 2, a test point 3, a test point 4, a test point 5, a test point 6, a test point 7, a test point 8, a test point 9, a current collection point, a pre-charging relay control, a total positive relay control, a heating relay control, a fast-charging relay control and a total negative relay control, and the detection circuit board comprises, The device comprises a pre-charging resistor voltage division module, an ADC1 voltage sampling module, an ADC2 voltage sampling module, a current conditioning module, a relay control module, a CAN communication module and an MCU module.
In this embodiment, the heating relay and the heating fuse are electrically connected through a wire, and the total negative relay and the current hall sensor are also electrically connected through a wire.
A detection method for a battery distribution box of an electric automobile comprises the following steps:
s1: the testing point 1 of the input end of the distribution box detection system is connected with the positive pole of a program-controlled voltage source, the testing point 7 is connected with the negative pole of the program-controlled voltage source, the testing point 8 on the left side of the current Hall sensor is connected with the negative pole of the program-controlled current source, and the testing point 9 on the right side is connected with the positive pole of the program-controlled current source;
s2: the distribution box test point 1 is connected with the detection circuit board test point 1, the distribution box test point 2 is connected with the detection circuit board test point 2, the distribution box test point 3 is connected with the detection circuit board test point 3, the distribution box test point 4 is connected with the detection circuit board test point 4, the distribution box test point 5 is connected with the detection circuit board test point 5, the distribution box test point 6 is connected with the detection circuit board test point 6, the distribution box test point 7 is connected with the detection circuit board test point 7, the distribution box test point 8 is connected with the detection circuit board test point 8, the distribution box current collection point is connected with the detection circuit board current collection point, the distribution box pre-charging relay is controlled to be connected with the detection circuit board pre-charging relay control, the distribution box is controlled to be connected with the detection circuit board heating relay control, the distribution box, the distribution box total negative relay control is connected with the detection circuit board total negative relay control;
s3: starting an upper computer, controlling the program-controlled voltage source to output 100V, and measuring the input voltage Vbat of the test point 1 to the test point 7 through the detection circuit board;
s4: measuring the voltage Vpre of the test point 2 to the test point 7, measuring the voltage Vpos of the test point 3 to the test point 7, reporting the adhesion fault of the pre-charging or total positive relay if the Vpre is more than or equal to 0.9Vbat or the Vpos is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, go to S5;
s5: measuring the voltage Vheat of the test point 4 to the test point 7, if the voltage Vheat is more than or equal to 0.9Vbat, reporting the adhesion fault of the heating relay, recording the fault, and ending the test; otherwise, go to S6;
s6: measuring the voltage Vqchg of the test point 6 to the test point 7, reporting the adhesion fault of the quick charging relay if the Vqchg is more than or equal to 0.9Vbat, recording the fault, and finishing the test; otherwise, go to S7;
s7: measuring the voltage Vneg of the test point 1 to the test point 8, if the Vneg is more than or equal to 0.9Vbat, reporting the adhesion fault of the total negative relay, recording the fault, and ending the test; otherwise, go to S8;
s8: closing the pre-charging relay, measuring Vpre, reporting the closing fault of the pre-charging relay if the Vpre is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, measuring Vpos, reporting a pre-charging resistance fault if Vpos is less than or equal to 0.45Vbat or Vpos is more than or equal to 0.55Vbat, recording the fault, and ending the test; otherwise, disconnecting the pre-charging relay, measuring Vpre, reporting the disconnection fault of the pre-charging relay if the Vpre is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, go to S9;
s9: closing the total positive relay, measuring Vpos, reporting the closing fault of the total positive relay if the Vpos is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, disconnecting the main positive relay, measuring Vpos, reporting the disconnection fault of the main positive relay if the Vpos is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, go to S10;
s10: closing the heating relay, measuring Vheat, reporting the closing fault of the heating relay if Vheat is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, measuring the voltage Vuse of the test point 5 to the test point 7, if the Vuse is less than or equal to 0.6Vbat, reporting the fault of the heating fuse, recording the fault, and ending the test; otherwise, the heating relay is disconnected, Vheat is measured, if Vheat is more than or equal to 0.9Vbat, the disconnection fault of the heating relay is reported, the fault is recorded, and the test is finished; otherwise, go to S11;
s11: closing the quick charging relay, measuring Vqchg, reporting a closing fault of the quick charging relay if the Vqchg is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, disconnecting the quick charge relay, measuring Vqchg, reporting the disconnection fault of the quick charge relay if the Vqchg is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, entering 12;
s12: closing the total negative relay, measuring Vneg, reporting the closing fault of the total negative relay if the Vneg is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, disconnecting the total negative relay, measuring Vneg, reporting the disconnection fault of the total negative relay if the Vneg is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, go to S13;
s13: setting the program-controlled current source output 100A, measuring loop current Icur of a test point 8 and a test point 9, reporting a fault of the current Hall sensor if the Icur is more than or equal to 101A or the Icur is less than or equal to 99A, recording the fault, and ending the test; otherwise, the test is finished.
In this embodiment, the current collection point feeds back a signal to the MCU module through the current conditioning module.
In this embodiment, the test point 1, the test point 2, the test point 3, the test point 4, the test point 5, the test point 6, and the test point 7 feed back signals to the MCU module through the ADC1 voltage sampling module.
In this embodiment, the test point 1 and the test point 8 feed back signals to the MCU module through the ADC2 voltage sampling module.
The working principle is that as shown in fig. 1, the electrical principle schematic diagram of the battery system distribution box comprises a pre-charging relay, a pre-charging resistor, a total positive relay, a heating fuse, a quick-charging relay, a total negative relay and a current hall sensor.
As shown in fig. 2, the schematic diagram of the test point position of the battery system distribution box detection system includes a schematic diagram of an electrical principle of a distribution box, a test point 1, a test point 2, a test point 3, a test point 4, a test point 5, a test point 6, a test point 7, a test point 8, a test point 9, a current collection point, a pre-charge relay control, a total positive relay control, a heating relay control, a quick-charge relay control and a total negative relay control.
As shown in fig. 4, the schematic diagram of the detection principle of the detection system of the battery system distribution box includes a detection circuit board, a PC upper computer, a program-controlled voltage source and a program-controlled current source, wherein the detection circuit board includes a resistance voltage dividing module, a pre-charging resistance voltage dividing module, an ADC1 voltage sampling module, an ADC2 voltage sampling module, a current conditioning module, a relay control module, a CAN communication module and an MCU module.
S1: as shown in fig. 3, a test point 1 at an input end of the distribution box detection system is connected to a positive pole of a programmable voltage source, a test point 7 is connected to a negative pole of the programmable voltage source, a test point 8 at the left side of the current hall sensor is connected to a negative pole of the programmable current source, and a test point 9 at the right side is connected to a positive pole of the programmable current source.
S2: as shown in FIG. 2 and FIG. 4, a distribution box test point 1 is connected with a detection circuit board test point 1, a distribution box test point 2 is connected with a detection circuit board test point 2, a distribution box test point 3 is connected with a detection circuit board test point 3, a distribution box test point 4 is connected with a detection circuit board test point 4, a distribution box test point 5 is connected with a detection circuit board test point 5, a distribution box test point 6 is connected with a detection circuit board test point 6, a distribution box test point 7 is connected with a detection circuit board test point 7, a distribution box test point 8 is connected with a detection circuit board test point 8, a distribution box current collection point is connected with a detection circuit board current collection point, a distribution box pre-charge relay control is connected with a detection circuit board pre-charge relay control, a distribution box total positive, the distribution box quick-charging relay is connected with the detection circuit board quick-charging relay for control, and the distribution box total negative relay is connected with the detection circuit board total negative relay for control.
S3: as shown in fig. 5, the upper computer is started to control the programmable voltage source to output 100V, and the input voltage Vbat of the test point 1 to the test point 7 is measured through the detection circuit board.
S4: measuring the voltage Vpre of the test point 2 to the test point 7, measuring the voltage Vpos of the test point 3 to the test point 7, reporting the adhesion fault of the pre-charging or total positive relay if the Vpre is more than or equal to 0.9Vbat or the Vpos is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, the process proceeds to S5.
S5: measuring the voltage Vheat of the test point 4 to the test point 7, if the voltage Vheat is more than or equal to 0.9Vbat, reporting the adhesion fault of the heating relay, recording the fault, and ending the test; otherwise, the process proceeds to S6.
S6: measuring the voltage Vqchg of the test point 6 to the test point 7, reporting the adhesion fault of the quick charging relay if the Vqchg is more than or equal to 0.9Vbat, recording the fault, and finishing the test; otherwise, the process proceeds to S7.
S7: measuring the voltage Vneg of the test point 1 to the test point 8, if the Vneg is more than or equal to 0.9Vbat, reporting the adhesion fault of the total negative relay, recording the fault, and ending the test; otherwise, the process proceeds to S8.
S8: closing the pre-charging relay, measuring Vpre, reporting the closing fault of the pre-charging relay if the Vpre is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, measuring Vpos, reporting a pre-charging resistance fault if Vpos is less than or equal to 0.45Vbat or Vpos is more than or equal to 0.55Vbat, recording the fault, and ending the test; otherwise, disconnecting the pre-charging relay, measuring Vpre, reporting the disconnection fault of the pre-charging relay if the Vpre is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, the process proceeds to S9.
S9: closing the total positive relay, measuring Vpos, reporting the closing fault of the total positive relay if the Vpos is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, disconnecting the main positive relay, measuring Vpos, reporting the disconnection fault of the main positive relay if the Vpos is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, the process proceeds to S10.
S10: closing the heating relay, measuring Vheat, reporting the closing fault of the heating relay if Vheat is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, measuring the voltage Vuse of the test point 5 to the test point 7, if the Vuse is less than or equal to 0.6Vbat, reporting the fault of the heating fuse, recording the fault, and ending the test; otherwise, the heating relay is disconnected, Vheat is measured, if Vheat is more than or equal to 0.9Vbat, the disconnection fault of the heating relay is reported, the fault is recorded, and the test is finished; otherwise, the process proceeds to S11.
S11: closing the quick charging relay, measuring Vqchg, reporting a closing fault of the quick charging relay if the Vqchg is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, disconnecting the quick charge relay, measuring Vqchg, reporting the disconnection fault of the quick charge relay if the Vqchg is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, the process proceeds to S12.
S12: closing the total negative relay, measuring Vneg, reporting the closing fault of the total negative relay if the Vneg is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, disconnecting the total negative relay, measuring Vneg, reporting the disconnection fault of the total negative relay if the Vneg is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, the process proceeds to S13.
S13: setting the program-controlled current source output 100A, measuring loop current Icur of a test point 8 and a test point 9, reporting a fault of the current Hall sensor if the Icur is more than or equal to 101A or the Icur is less than or equal to 99A, recording the fault, and ending the test; otherwise, the test is finished.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The detection system for the battery distribution box of the electric automobile comprises a battery system distribution box, a program-controlled voltage source, a program-controlled current source, a detection circuit board and a set of PC upper computer communication system and is characterized in that the battery system distribution box comprises a pre-charging relay, a pre-charging resistor, a total positive relay, a heating fuse, a quick-charging relay, a total negative relay and a current Hall sensor, wherein the battery system distribution box and the detection circuit board are respectively provided with a test point 1, a test point 2, a test point 3, a test point 4, a test point 5, a test point 6, a test point 7, a test point 8, a test point 9, a current collection point, a pre-charging relay control, a total positive relay control, a heating relay control, a quick-charging relay control and a total negative relay control, and the detection circuit board, The device comprises a pre-charging resistor voltage division module, an ADC1 voltage sampling module, an ADC2 voltage sampling module, a current conditioning module, a relay control module, a CAN communication module and an MCU module.
2. The system for detecting the battery distribution box of the electric automobile according to claim 1, wherein the heating relay and the heating fuse are electrically connected through a conducting wire, and the total negative relay and the current hall sensor are also electrically connected through a conducting wire.
3. A detection method for a battery distribution box of an electric automobile comprises the following steps:
s1: the testing point 1 of the input end of the distribution box detection system is connected with the positive pole of a program-controlled voltage source, the testing point 7 is connected with the negative pole of the program-controlled voltage source, the testing point 8 on the left side of the current Hall sensor is connected with the negative pole of the program-controlled current source, and the testing point 9 on the right side is connected with the positive pole of the program-controlled current source;
s2: the distribution box test point 1 is connected with the detection circuit board test point 1, the distribution box test point 2 is connected with the detection circuit board test point 2, the distribution box test point 3 is connected with the detection circuit board test point 3, the distribution box test point 4 is connected with the detection circuit board test point 4, the distribution box test point 5 is connected with the detection circuit board test point 5, the distribution box test point 6 is connected with the detection circuit board test point 6, the distribution box test point 7 is connected with the detection circuit board test point 7, the distribution box test point 8 is connected with the detection circuit board test point 8, the distribution box current collection point is connected with the detection circuit board current collection point, the distribution box pre-charging relay is controlled to be connected with the detection circuit board pre-charging relay control, the distribution box is controlled to be connected with the detection circuit board heating relay control, the distribution box, the distribution box total negative relay control is connected with the detection circuit board total negative relay control;
s3: starting an upper computer, controlling the program-controlled voltage source to output 100V, and measuring the input voltage Vbat of the test point 1 to the test point 7 through the detection circuit board;
s4: measuring the voltage Vpre of the test point 2 to the test point 7, measuring the voltage Vpos of the test point 3 to the test point 7, reporting the adhesion fault of the pre-charging or total positive relay if the Vpre is more than or equal to 0.9Vbat or the Vpos is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, go to S5;
s5: measuring the voltage Vheat of the test point 4 to the test point 7, if the voltage Vheat is more than or equal to 0.9Vbat, reporting the adhesion fault of the heating relay, recording the fault, and ending the test; otherwise, go to S6;
s6: measuring the voltage Vqchg of the test point 6 to the test point 7, reporting the adhesion fault of the quick charging relay if the Vqchg is more than or equal to 0.9Vbat, recording the fault, and finishing the test; otherwise, go to S7;
s7: measuring the voltage Vneg of the test point 1 to the test point 8, if the Vneg is more than or equal to 0.9Vbat, reporting the adhesion fault of the total negative relay, recording the fault, and ending the test; otherwise, go to S8;
s8: closing the pre-charging relay, measuring Vpre, reporting the closing fault of the pre-charging relay if the Vpre is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, measuring Vpos, reporting a pre-charging resistance fault if Vpos is less than or equal to 0.45Vbat or Vpos is more than or equal to 0.55Vbat, recording the fault, and ending the test; otherwise, disconnecting the pre-charging relay, measuring Vpre, reporting the disconnection fault of the pre-charging relay if the Vpre is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, go to S9;
s9: closing the total positive relay, measuring Vpos, reporting the closing fault of the total positive relay if the Vpos is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, disconnecting the main positive relay, measuring Vpos, reporting the disconnection fault of the main positive relay if the Vpos is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, go to S10;
s10: closing the heating relay, measuring Vheat, reporting the closing fault of the heating relay if Vheat is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, measuring the voltage Vuse of the test point 5 to the test point 7, if the Vuse is less than or equal to 0.6Vbat, reporting the fault of the heating fuse, recording the fault, and ending the test; otherwise, the heating relay is disconnected, Vheat is measured, if Vheat is more than or equal to 0.9Vbat, the disconnection fault of the heating relay is reported, the fault is recorded, and the test is finished; otherwise, go to S11;
s11: closing the quick charging relay, measuring Vqchg, reporting a closing fault of the quick charging relay if the Vqchg is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, disconnecting the quick charge relay, measuring Vqchg, reporting the disconnection fault of the quick charge relay if the Vqchg is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, entering 12;
s12: closing the total negative relay, measuring Vneg, reporting the closing fault of the total negative relay if the Vneg is less than or equal to 0.6Vbat, recording the fault, and ending the test; otherwise, disconnecting the total negative relay, measuring Vneg, reporting the disconnection fault of the total negative relay if the Vneg is more than or equal to 0.9Vbat, recording the fault, and ending the test; otherwise, go to S13;
s13: setting the program-controlled current source output 100A, measuring loop current Icur of a test point 8 and a test point 9, reporting a fault of the current Hall sensor if the Icur is more than or equal to 101A or the Icur is less than or equal to 99A, recording the fault, and ending the test; otherwise, the test is finished.
4. The method for detecting the battery distribution box of the electric automobile according to claim 3, wherein the current collection point feeds back a signal to the MCU module through the current conditioning module.
5. The detection method of the battery distribution box of the electric automobile according to claim 3, characterized in that the test point 1, the test point 2, the test point 3, the test point 4, the test point 5, the test point 6 and the test point 7 feed back signals to the MCU module through the ADC1 voltage sampling module.
6. The detection method of the battery distribution box of the electric automobile according to claim 3, characterized in that the test point 1 and the test point 8 feed back signals to the MCU module through the ADC2 voltage sampling module.
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Application publication date: 20210413 |