CN114013283B - High-voltage power distribution system and system detection method for electric automobile and electric automobile - Google Patents

High-voltage power distribution system and system detection method for electric automobile and electric automobile Download PDF

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CN114013283B
CN114013283B CN202111521033.7A CN202111521033A CN114013283B CN 114013283 B CN114013283 B CN 114013283B CN 202111521033 A CN202111521033 A CN 202111521033A CN 114013283 B CN114013283 B CN 114013283B
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control module
module
voltage
power distribution
charge
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CN114013283A (en
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曹灵云
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Hubei Eve Power Co Ltd
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Hubei Eve Power Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0084—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to control modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • B60R16/0238—Electrical distribution centers
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The embodiment of the invention discloses an electric automobile high-voltage power distribution system, a system detection method and an electric automobile. This electric automobile high voltage distribution system includes: the power distribution system comprises a power distribution module, a high-voltage detection module, a power distribution control module and a high-voltage battery; the power distribution module is respectively connected with the high-voltage detection module, the power distribution control module and the high-voltage battery, and the power distribution control module is connected with the high-voltage detection module; the power distribution control module is used for receiving the control signal sent by the high-voltage detection module and controlling the power distribution module to gate different connecting loops according to the control signal; the high-voltage detection module is used for detecting the voltage of the connecting loop of the power distribution module and confirming the fault state of the power distribution module according to the voltage of the connecting loop of the power distribution module. The scheme can realize fault detection of the power distribution module, so that comprehensiveness and safety of power-on fault self-detection of the high-voltage power distribution system of the electric automobile are improved.

Description

High-voltage power distribution system and system detection method for electric automobile and electric automobile
Technical Field
The embodiment of the invention relates to the technical field of high-voltage power distribution, in particular to an electric automobile high-voltage power distribution system, a system detection method and an electric automobile.
Background
The high-voltage distribution system of the electric automobile is a high-voltage distribution unit of all pure electric automobiles and plug-in hybrid electric automobiles, adopts a centralized distribution scheme, and has the characteristics of compact design structure, convenience in wiring layout, easiness in maintenance and the like. In addition, aiming at the system architecture requirements of different clients, the electric automobile high-voltage power distribution system also integrates part of intelligent control management units of the battery management system so as to simplify the complexity of the power distribution of the whole automobile system architecture.
However, most charging relays and discharging relays in the high-voltage distribution systems of electric automobiles in the market at present are in parallel connection, and once the charging relays have adhesion failure faults, the high-voltage batteries can be overcharged and damaged, and even accidents such as fire and explosion can be caused. At present, most of the methods for detecting adhesion of the relay adopt a voltage comparison method, namely, voltages at the front end and the rear end of the relay are compared, so that whether the relay is in adhesion failure or not is judged. However, the comparative voltage method cannot determine an open circuit failure of the relay or an open circuit failure of the precharge resistor.
Disclosure of Invention
The embodiment of the invention provides an electric automobile high-voltage power distribution system, a system detection method and an electric automobile, so that fault detection is carried out when the high-voltage power distribution system is electrified, and the comprehensiveness and safety of the self-detection of the electrified fault of the electric automobile high-voltage power distribution system are improved.
In a first aspect, an embodiment of the present invention provides an electric vehicle high voltage power distribution system, including: the power distribution system comprises a power distribution module, a high-voltage detection module, a power distribution control module and a high-voltage battery;
the power distribution module is respectively connected with the high-voltage detection module, the power distribution control module and the high-voltage battery, and the power distribution control module is connected with the high-voltage detection module;
the power distribution control module is used for receiving the control signal sent by the high-voltage detection module and controlling the power distribution module to gate different connecting loops according to the control signal;
the high-voltage detection module is used for detecting the voltage of the connecting loop of the power distribution module and confirming the fault state of the power distribution module according to the voltage of the connecting loop of the power distribution module.
Optionally, the power distribution module includes: the device comprises a first charging control module, a second charging control module, a first total control module, a second total control module, a pre-charging control module and a pre-charging current limiting module;
the second end of the first charge control module is connected with the negative end of the external driving device and the first end of the first total control module, the second end of the first total control module is connected with the negative end of the high-voltage battery, the positive end of the high-voltage battery is connected with the second end of the second total control module and the second end of the pre-charge control module, the first end of the second total control module is connected with the second end of the second charge control module, the first end of the pre-charge current limiting module and the positive end of the external driving device, and the second end of the pre-charge current limiting module is connected with the first end of the pre-charge control module; wherein the external driving device comprises two front drivers and two rear drivers;
The high-voltage detection module is connected with the second end of the pre-charging control module, the first end of the second general control module, the first end of the second charging control module, the first end of the first charging control module and the second end of the first general control module
The power distribution control module is connected with the high-voltage detection module, the first charging control module, the second charging control module, the first total control module, the second total control module and the pre-charging control module;
the power distribution control module is used for receiving the control signal sent by the high-voltage detection module and controlling the conduction states of the first charging control module, the second charging control module, the first total control module, the second total control module and the pre-charging control module according to the control signal;
the high-voltage detection module is used for detecting a voltage difference between a first end of the pre-charge control module, a second end of the pre-charge control module, a first end of the second total control module or a second end of the first total control module and the first end of the first total control module according to the conducting states of the first charge control module, the second charge control module, the first total control module and the pre-charge control module, and a voltage difference between the first end of the second charge control module and the first end of the first charge control module, and determining fault states of the first charge control module, the second charge control module, the first total control module, the second total control module, the pre-charge control module and the pre-charge current limiting module according to the voltage difference.
Optionally, the power distribution control module is configured to receive a first control signal of the high voltage detection module, and control the first charging control module, the second charging control module, the first total control module, the second total control module and the pre-charging control module to be disconnected according to the first control signal;
the high-voltage detection module is used for detecting the voltage difference between the first end of the pre-charge control module and the second end of the second total control module, and judging whether the pre-charge control module and the second total control module have adhesion faults or not according to the voltage difference between the first end of the pre-charge control module and the first end of the second total control module and the second end of the first total control module.
Optionally, the high-voltage detection module is used for sending a second control signal to the power distribution control module when the pre-charge control module and the second general control module have no adhesion fault, and the power distribution control module is used for controlling the pre-charge control module to be conducted according to the second control signal;
the high-voltage detection module is used for detecting the voltage difference between the first end of the pre-charge control module and the second end of the second total control module, and judging whether the pre-charge control module and the pre-charge current limiting module have an open circuit fault or not according to the voltage difference between the first end of the pre-charge control module and the second end of the second total control module.
Optionally, when the pre-charging control module and the pre-charging current limiting module do not have an open-circuit fault, the high voltage detection module is further configured to determine whether the first main control module has an adhesion fault according to a voltage change between the first end of the pre-charging control module and the second end of the first main control module.
Optionally, the high-voltage detection module is used for sending a third control signal to the power distribution control module when the first total control module has no adhesion fault, and the power distribution control module is used for controlling the first total control module to be turned on and the pre-charging control module to be turned off according to the third control signal;
the high-voltage detection module is used for detecting the voltage difference between the first end of the second total control module and the second end of the first total control module, and judging whether the second total control module has adhesion failure or not according to the voltage difference between the first end of the second total control module and the second end of the first total control module.
Optionally, the high-voltage detection module is used for sending a fourth control signal to the power distribution control module when the second total control module has no adhesion fault, and the power distribution control module is used for controlling the second total control module to be conducted according to the fourth control signal;
the high-voltage detection module is used for detecting the voltage difference between the first end of the second charging control module and the second end of the first total control module, and judging whether the second charging control module has adhesion failure or not according to the voltage difference between the first end of the second charging control module and the second end of the first total control module.
Optionally, the high-voltage detection module is used for sending a fifth control signal to the power distribution control module when the second charging control module has no adhesion fault, and the power distribution control module is used for controlling the second charging control module to be conducted according to the fifth control signal;
the high-voltage detection module is used for detecting the voltage difference between the first end of the second charging control module and the first end of the first charging control module, and judging whether the first charging control module has adhesion failure or not according to the voltage difference between the first end of the second charging control module and the first end of the first charging control module.
Optionally, the first charging control module includes a first switch, the second charging control module includes a second switch, the first total control module includes a third switch, the second total control module includes a fourth switch, the pre-charging control module includes a fifth switch, and the pre-charging current limiting module includes a resistor.
Optionally, the first switch, the second switch, the third switch, the fourth switch and the fifth switch all use relays.
In a second aspect, an embodiment of the present invention further provides a method for detecting a high-voltage power distribution system of an electric automobile, where the method is used for detecting the high-voltage power distribution system of the electric automobile in any one of the foregoing embodiments, and the method includes:
The power distribution control module receives the control signal sent by the high-voltage detection module and controls the power distribution module to gate different connecting loops according to the control signal;
the high-voltage detection module detects the voltage of the connecting loop of the power distribution module and confirms the fault state of the power distribution module according to the voltage of the connecting loop of the power distribution module.
Optionally, the power distribution module includes a first charging control module, a second charging control module, a first total control module, a second total control module, a pre-charging control module, and a pre-charging current limiting module;
the second end of the first charge control module is connected with the negative end of the external driving device and the first end of the first total control module, the second end of the first total control module is connected with the negative end of the high-voltage battery, the positive end of the high-voltage battery is connected with the second end of the second total control module and the second end of the pre-charge control module, the first end of the second total control module is connected with the second end of the second charge control module, the first end of the pre-charge current limiting module and the positive end of the external driving device, and the second end of the pre-charge current limiting module is connected with the first end of the pre-charge control module; wherein the external driving device comprises two front drivers and two rear drivers;
the high-voltage detection module is connected with the second end of the pre-charge control module, the first end of the second general control module, the first end of the second charge control module, the first end of the first charge control module and the second end of the first general control module;
The power distribution control module is connected with the high-voltage detection module, the first charging control module, the second charging control module, the first total control module, the second total control module and the pre-charging control module;
the power distribution control module receives the control signal sent by the high-voltage detection module and controls the conduction states of the first charging control module, the second charging control module, the first total control module, the second total control module and the pre-charging control module according to the control signal;
the high-voltage detection module detects the voltage difference between the first end of the pre-charge control module, the second end of the pre-charge control module, the first end of the second total control module or the first end of the second charge control module and the second end of the first total control module according to the conducting states of the first charge control module, the second charge control module, the first total control module and the pre-charge control module, and the voltage difference between the first end of the second charge control module and the first end of the first charge control module, and determines the fault states of the first charge control module, the second charge control module, the first total control module, the second total control module, the pre-charge control module and the pre-charge current limiting module according to the voltage difference.
In a third aspect, an embodiment of the present invention further provides an electric vehicle, including the electric vehicle high-voltage power distribution system of any one of the above embodiments, two front drivers, and two rear drivers;
The power distribution module in the high-voltage power distribution system of the electric automobile is respectively connected with the two front drivers and the two rear drivers; the electric automobile high-voltage distribution system is used for supplying power to the front driver and the rear driver.
According to the embodiment of the invention, the power distribution control module can receive the control signal sent by the high-voltage detection module and control the power distribution module to gate different connection loops according to the control signal; the high-voltage detection module can detect the voltage of the power distribution module connection loop and confirm the fault state of the power distribution module according to the voltage of the power distribution module connection loop. Therefore, fault detection of the power distribution module can be realized, and the comprehensiveness and safety of power-on fault self-detection of the high-voltage power distribution system of the electric automobile are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, a brief description will be given below of the drawings required for the embodiments or the description of the prior art, and it is obvious that although the drawings in the following description are specific embodiments of the present invention, it is obvious to those skilled in the art that the basic concepts of the device structure, the driving method and the manufacturing method, which are disclosed and suggested according to the various embodiments of the present invention, are extended and extended to other structures and drawings, and it is needless to say that these should be within the scope of the claims of the present invention.
Fig. 1 is a schematic structural diagram of an electric automobile high-voltage distribution system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another high-voltage distribution system of an electric automobile according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another high-voltage distribution system of an electric automobile according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a method for detecting high-voltage power distribution of an electric automobile according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of another method for detecting high-voltage power distribution of an electric automobile according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electric vehicle according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a high-voltage power distribution system of an electric automobile, and fig. 1 is a schematic structural diagram of the high-voltage power distribution system of the electric automobile. As shown in fig. 1, the electric car high voltage power distribution system includes: a power distribution module 100, a high voltage detection module 200, a power distribution control module 300, and a high voltage battery 400; the power distribution module 100 is respectively connected with the high-voltage detection module 200, the power distribution control module 300 and the high-voltage battery 400, and the power distribution control module 300 is connected with the high-voltage detection module 200; the power distribution control module 300 is configured to receive the control signal sent by the high voltage detection module 200, and control the power distribution module 100 to gate different connection loops according to the control signal; the high voltage detection module 200 is configured to detect a voltage of a connection loop of the power distribution module 100, and confirm a fault state of the power distribution module 100 according to the voltage of the connection loop of the power distribution module 100.
Specifically, the power distribution module 100 has a plurality of different connection loops, the power distribution module 100 is connected with the power distribution control module 300, and the power distribution module 100 can gate different conduction loops under the control of the power distribution control module 300, so as to realize different functional power distribution. The power distribution module 100 is connected with the high voltage detection module 200, and the high voltage detection module 200 can perform voltage detection on the line connected inside the power distribution module 100 in the process of gating the connection loop of the power distribution module 100, so as to confirm whether the line inside the power distribution module 100 fails. The power distribution control module 300 is connected to the high voltage detection module 200, and if the high voltage detection module 200 confirms that the circuit inside the power distribution module 100 has not failed, the high voltage detection module 200 also sends a control signal to the power distribution control module 300, so that it controls the power distribution module 100 to continuously control the power distribution module 100 to gate different connection loops.
According to the embodiment of the invention, the power distribution control module can receive the control signal sent by the high-voltage detection module and control the power distribution module to gate different connection loops according to the control signal; the high-voltage detection module can detect the voltage of the power distribution module connection loop and confirm the fault state of the power distribution module according to the voltage of the power distribution module connection loop. Therefore, fault detection of the power distribution module can be realized, and the comprehensiveness and safety of power-on fault self-detection of the high-voltage power distribution system of the electric automobile are improved.
Fig. 2 is a schematic structural diagram of another high-voltage distribution system for an electric automobile according to an embodiment of the present invention. As shown in fig. 2, the power distribution module includes: the first charge control module 110, the second charge control module 120, the first master control module 130, the second master control module 140, the precharge control module 150, and the precharge current limiting module 160;
the second end of the first charge control module 110 is connected to the negative end of the external driving device 210 and the first end of the first total control module 130, the second end A2 of the first total control module 130 is connected to the negative end of the high-voltage battery 400, the positive end of the high-voltage battery 400 is connected to the second end of the second total control module 140 and the second end B4 of the pre-charge control module 150, the first end B2 of the second total control module 140 is connected to the second end of the second charge control module 120, the first end of the pre-charge current limiting module 160 and the positive end of the external driving device 210, and the second end of the pre-charge current limiting module 160 is connected to the first end B3 of the pre-charge control module 150; wherein the external driving device 210 includes two front drivers and two rear drivers; the high voltage detection module 200 is connected to the second end B4 of the pre-charge control module 150, the first end B3 of the pre-charge control module 150, the first end B2 of the second master control module 140, the first end B1 of the second charge control module 120, the first end A1 of the first charge control module 110, and the second end A2 of the first master control module 130; the power distribution control module 300 is connected with the high voltage detection module 200, the first charging control module 110, the second charging control module 120, the first total control module 130, the second total control module 140 and the pre-charging control module 150;
The power distribution control module 300 is configured to receive the control signal sent by the high voltage detection module 200, and control the conductive states of the first charging control module 110, the second charging control module 120, the first total control module 130, the second total control module 140, and the pre-charging control module 150 according to the control signal; the high voltage detection module 200 is configured to detect a voltage difference between the first terminal B3 of the pre-charge control module 150, the second terminal B4 of the pre-charge control module 150, the first terminal B2 of the second total control module 140 or the first terminal B1 of the second charge control module 120 and the second terminal A2 of the first total control module 130, and a voltage difference between the first terminal B1 of the second charge control module 120 and the first terminal A1 of the first charge control module 110 according to the conductive states of the first charge control module 110, the second charge control module 130, the second total control module 140, the pre-charge control module 150 and the pre-charge current limiting module 150, and determine fault states of the first charge control module 110, the second charge control module 120, the first total control module 130, the second total control module 140, the pre-charge control module 150 and the pre-charge current limiting module 160 according to the voltage differences.
The high-voltage distribution system of the electric automobile is a control system for distributing electric energy distribution of the electric automobile, and different functional loops can be communicated by conducting different circuits. Specifically, according to the connection relationship and the functions of the functional modules, when the power distribution control module 300 of the electric vehicle high voltage system controls the pre-charge control module 150 and the first general control module 130 to be conducted, the pre-charge circuit between the high voltage battery 400 and the external driving device 210 can be conducted, and the pre-charge of the external driving device 210 can be achieved. The pre-charge current limiting module 160 on the pre-charge circuit can limit the effect of the high voltage battery 400 on the capacitor charging current in the external driving device 210 instantaneously so as to protect other devices in the external driving device 210 from being damaged by the short circuit current instantaneously applied to the capacitor. When the power distribution control module 300 of the high-voltage system of the electric automobile controls the first total control module 130 and the second total control module 140 to be conducted, the high-voltage battery 400 can be conducted with the discharge loop of the external driving device 210, so that the external driving device 210 can work normally under the working voltage. When the power distribution control module 300 of the high-voltage system of the electric automobile controls the first overall control module 130, the second overall control module 140, the first charging control module 110 and the second charging control module 120 to be turned on, the first end A1 of the first charging control module 110 and the first end B1 of the second charging control module 120 may be connected with an external power source, so as to realize the conduction of the high-voltage battery 400 and the charging circuit of the external power source, and charge the high-voltage battery 400. Therefore, whether the first master control module 130, the second master control module 140, the pre-charge control module 150 and the pre-charge current limiting module 160 in the high-voltage power distribution system of the electric automobile can work normally is directly related to whether the electric automobile can be used normally. Whether the first charging control module 110, the second charging control module 120, the first general control module 130 and the second general control module 140 in the electric automobile high-voltage power distribution system can work normally or not directly relates to the charging safety of the electric automobile. In this scheme, when the high-voltage power distribution system of the electric automobile is powered on, the high-voltage detection module 200 is used to send a control signal to the power distribution control module 300, so that the power distribution control module 300 is connected to different lines, and the high-voltage detection module 200 selectively detects the voltage difference between the first end B3 of the pre-charge control module 150, the second end B4 of the pre-charge control module 150, the first end B2 of the second main control module 140 or the first end B1 of the second charge control module 120 and the second end A2 of the first main control module 130 in different connecting lines, and the voltage difference between the first end B1 of the second charge control module 120 and the first end A1 of the first charge control module 110, so as to implement fault checking on the first charge control module 110, the second charge control module 120, the first main control module 130, the second main control module 140, the pre-charge control module 150 and the pre-charge current limiting module 160 one by one, thereby ensuring the comprehensiveness of the detection of the high-voltage detection module 200 and further increasing the safety of the use of the electric automobile.
In summary, when the high-voltage power distribution system of the electric automobile is powered on, the high-voltage detection module is utilized to send control signals to the power distribution control module, so that the power distribution control module is communicated with different lines, the high-voltage detection module can selectively detect the voltage difference between the first end of the pre-charge control module, the second end of the pre-charge control module, the first end of the second general control module or the first end of the second charge control module and the second end of the first general control module in different connecting lines, and the voltage difference between the first end of the second charge control module and the first end of the first charge control module can realize fault checking of the first charge control module, the second charge control module, the first general control module, the second general control module, the pre-charge control module and the pre-charge current limiting module one by one, so that all modules of the high-voltage power distribution system of the electric automobile can realize pre-charge of an external driving device, power supply of the external driving device and charge of the high-voltage battery through connection with an external power supply under the condition of no faults, and the safety of the high-voltage power distribution system of the electric automobile is improved. In addition, when the high-voltage power distribution system of the electric automobile is connected with an external power supply to charge a high-voltage battery, the high-voltage battery needs to be charged under the control of the first charging control module, the second charging control module, the first total control module and the second total control module.
When the high-voltage distribution system of the electric automobile is electrified, the first charging control module, the second charging control module, the first total control module, the second total control module, the pre-charging control module and the pre-charging current limiting module are subjected to comprehensive fault detection under the cooperation of the high-voltage detection module and the distribution control module, and the comprehensive fault detection is specifically as follows:
optionally, with continued reference to fig. 2, the power distribution control module 300 is configured to receive a first control signal of the high voltage detection module 200, and control the first charging control module 110, the second charging control module 120, the first total control module 130, the second total control module 140, and the pre-charging control module 150 to be disconnected according to the first control signal; the high voltage detection module 200 is configured to detect voltage differences between the first end B3 of the pre-charge control module 150 and the first end B2 of the second main control module 140 and the second end A2 of the first main control module 130, and determine whether the pre-charge control module 150 and the second main control module 140 have adhesion failure according to the voltage differences between the first end B3 of the pre-charge control module 150 and the first end B2 of the second main control module 140 and the second end A2 of the first main control module 130.
Specifically, when the electric vehicle high voltage power distribution system is powered on, the power distribution control module 300 receives the first control signal sent by the high voltage detection module 200, and the power distribution control module 300 controls all of the first charging control module 110, the second charging control module 120, the first total control module 130, the second total control module 140 and the pre-charging control module 150 to be disconnected, so that all functional circuits of the electric vehicle high voltage power distribution system are not turned on. The voltage difference between the first end B3 of the pre-charge control module 150 and the first end B2 of the second main control module 140 and the second end A2 of the first main control module 130 is detected by the high voltage detection module 200. If the voltage difference between the first end B3 of the pre-charge control module 150 and the second end A2 of the first main control module 130 is equal to the voltage of the high-voltage battery 400, and the voltage difference between the first end B2 of the second main control module 140 and the second end A2 of the first main control module 130 is equal to the voltage of the high-voltage battery 400, the high-voltage detection module 200 determines that at least one of the pre-charge control module 150 and the second main control module 140 has an adhesion fault; if the voltage difference between the first end B3 of the pre-charge control module 150 and the second end A2 of the first total control module 130 is equal to 0V, and the voltage difference between the first end B2 of the second total control module 140 and the second end A2 of the first total control module 130 is equal to 0V, the high voltage detection module 200 determines that no adhesion failure occurs between the pre-charge control module 150 and the second total control module 140.
Optionally, with continued reference to fig. 2, the high voltage detection module 200 is configured to send a second control signal to the power distribution control module 300 when no adhesion failure occurs in both the pre-charging control module 150 and the second master control module 140, and the power distribution control module 300 is configured to control the pre-charging control module 150 to be turned on according to the second control signal; the high voltage detection module 200 is configured to detect voltage differences between the first end B3 of the pre-charge control module 150 and the first end B2 of the second total control module 140 and the second end A2 of the first total control module 130, and determine whether the pre-charge control module 150 and the pre-charge current limiting module 160 have an open circuit fault according to the voltage differences between the first end B3 of the pre-charge control module 150 and the first end B2 of the second total control module 140 and the second end A2 of the first total control module 130.
When the high voltage detection module 200 determines that the pre-charge control module 150 and the second master control module 140 are not in failure, the power distribution control module 300 receives the second control signal sent by the high voltage detection module 200, and the power distribution control module 300 controls the pre-charge control module 150 to be turned on. At this time, the high voltage detection module 200 detects voltage differences between the first terminal B3 of the pre-charge control module 150 and the first terminal B2 of the second main control module 140 and the second terminal A2 of the first main control module 130, respectively. If the voltage difference between the first end B3 of the pre-charge control module 150 and the second end A2 of the first total control module 130 is equal to 0V, and the voltage difference between the first end B2 of the second total control module 140 and the second end A2 of the first total control module 130 is equal to 0V, the high voltage detection module 200 determines that the pre-charge control module 150 has an open circuit fault; if the voltage difference between the first end B3 of the pre-charge control module 150 and the second end A2 of the first total control module 130 is equal to the voltage of the high-voltage battery 400, and the voltage difference between the first end B2 of the second total control module 140 and the second end A2 of the first total control module 130 is equal to 0V, the high-voltage detection module 200 determines that the pre-charge current limiting module 160 has an open circuit fault; if neither of the above two conditions occurs, the high voltage detection module 200 determines that the open circuit fault does not occur in both the precharge control module 150 and the precharge current limiting module 160.
Optionally, with continued reference to fig. 2, when the pre-charge control module 150 and the pre-charge current limiting module 160 have no open-circuit fault, the high voltage detection module 200 is further configured to determine whether the first general control module 130 has an adhesion fault according to a voltage change between the first end B3 of the pre-charge control module 150 and the second end A2 of the first general control module 130.
When the high voltage detection module 200 determines that the pre-charge control module 150 and the pre-charge current limiting module 160 have no open-circuit fault, the high voltage detection module 200 further determines whether the first general control module 130 has an adhesion fault according to the voltage change between the first end B3 of the pre-charge control module 150 and the second end A2 of the first general control module 130. If the voltage difference between the first end B3 of the precharge control module 150 and the second end A2 of the first main control module 130 is not equal to 0V and is not equal to the voltage of the high-voltage battery 400, and the voltage difference between the first end B2 of the second main control module 140 and the second end A2 of the first main control module 130 is not equal to 0V and is not equal to the voltage of the high-voltage battery 400, the high-voltage detection module 200 determines that the first main control module 130 has an adhesion fault; if the voltage difference between the first end B3 of the pre-charge control module 150 and the second end A2 of the first total control module 130 is equal to the voltage of the high-voltage battery 400, the voltage difference between the first end B2 of the second total control module 140 and the second end A2 of the first total control module 130 is equal to the voltage of the high-voltage battery 400, the high-voltage detection module 200 determines that the first total control module 130 has no adhesion fault.
Optionally, with continued reference to fig. 2, the high voltage detection module 200 is configured to send a third control signal to the power distribution control module 300 when the first total control module 130 has no adhesion fault, and the power distribution control module 300 is configured to control the first total control module 130 to be turned on and the pre-charge control module 150 to be turned off according to the third control signal; the high voltage detection module 200 is configured to detect a voltage difference between the first end B1 of the second main control module 140 and the second end A2 of the first main control module 130, and determine whether the second main control module 140 has an adhesion failure according to the voltage difference between the first end B2 of the second main control module 140 and the second end A2 of the first main control module 130.
When the high voltage detection module 200 determines that the first total control module 130 has no adhesion fault, the power distribution control module 300 receives the third control signal sent by the high voltage detection module 200, and the power distribution control module 300 controls the first total control module 130 to be turned on and the pre-charge control module 150 to be turned off. At this time, the high voltage detection module 200 detects a voltage difference between the first end B2 of the second main control module 140 and the second end A2 of the first main control module 130. If the voltage difference between the first end B2 of the second master control module 140 and the second end A2 of the first master control module 130 is equal to the voltage of the high-voltage battery 400, the high-voltage detection module 200 determines that the second master control module 140 has an adhesion fault; if the voltage difference between the first end B2 of the second master control module 140 and the second end A2 of the first master control module 130 is equal to 0V, the high voltage detection module 200 determines that the second master control module 140 has no adhesion failure.
Optionally, with continued reference to fig. 2, the high voltage detection module 200 is configured to send a fourth control signal to the power distribution control module 300 when the second master control module 140 has no adhesion fault, and the power distribution control module 300 is configured to control the second master control module 140 to be turned on according to the fourth control signal; the high voltage detection module 200 is configured to detect a voltage difference between the first end B1 of the second charge control module 120 and the second end A2 of the first total control module 130, and determine whether the second charge control module 120 has an adhesion failure according to the voltage difference between the first end B1 of the second charge control module 120 and the second end A2 of the first total control module 130.
When the high voltage detection module 200 determines that the second master control module 140 has no adhesion fault, the power distribution control module 300 receives the fourth control signal sent by the high voltage detection module 200, and the power distribution control module 300 controls the second master control module 140 to be turned on. At this time, the high voltage detection module 200 detects a voltage difference between the first terminal B1 of the second charge control module 120 and the second terminal of the first general control module 130. If the voltage difference between the first end of the second charge control module 120 and the second end A2 of the first total control module 130 is equal to the voltage of the high-voltage battery 400, the high-voltage detection module 200 determines that the second charge control module 120 has an adhesion failure; if the voltage difference between the first end B1 of the second charge control module 120 and the second end A2 of the first total control module 130 is equal to 0V, the high voltage detection module 200 determines that the second charge control module 120 has no adhesion failure.
Optionally, with continued reference to fig. 2, the high voltage detection module 200 is configured to send a fifth control signal to the power distribution control module 300 when the second charging control module 120 has no adhesion fault, and the power distribution control module 300 is configured to control the second charging control module 120 to be turned on according to the fifth control signal; the high voltage detection module 200 is configured to detect a voltage difference between the first end B1 of the second charge control module 120 and the first end A1 of the first charge control module 110, and determine whether the first charge control module 110 has an adhesion failure according to the voltage difference between the first end B1 of the second charge control module 120 and the first end A1 of the first charge control module 110.
When the high voltage detection module 200 determines that the second charging control module 120 has no adhesion fault, the power distribution control module 300 receives the fifth control signal sent by the high voltage detection module 200, and the power distribution control module 300 controls the second charging control module 120 to be turned on. At this time, the high voltage detection module 200 detects a voltage difference between the first terminal B1 of the second charge control module 120 and the first terminal A1 of the first charge control module 110. If the voltage difference between the first end B1 of the second charge control module 120 and the first end A1 of the first charge control module 110 is equal to the voltage of the high-voltage battery 400, the high-voltage detection module 200 determines that the first charge control module 110 has an adhesion failure; if the voltage difference between the first end B1 of the second charge control module 120 and the first end A1 of the first charge control module 110 is equal to 0V, the high voltage detection module 200 determines that the first charge control module 110 has no adhesion failure.
Fig. 3 is a schematic structural diagram of another high-voltage power distribution system for an electric vehicle according to an embodiment of the present invention, as shown in fig. 3, the first charging control module 110 includes a first switch K1, the second charging control module 120 includes a second switch K2, the first total control module 130 includes a third switch K3, the second total control module 140 includes a fourth switch K4, the pre-charging control module 150 includes a fifth switch K5, and the pre-charging current limiting module 160 includes a resistor R.
Specifically, the power distribution control module 300 may enable different functional circuits inside the electric vehicle high-voltage power distribution system to be communicated by controlling the conducting states of the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5. For example, when the power distribution control module 300 of the high-voltage system of the electric automobile controls the fifth switch K5 and the third switch K3 to be turned on, the high-voltage battery 400 may be turned on to the pre-charge circuit of the external driving device 210, so as to implement the pre-charge of the external driving device 210. The pre-charge current limiting module 160 is a resistor R, which can limit the effect of the high-voltage battery 400 on the capacitor charging current in the external driving device 210 instantaneously, so as to protect other devices in the external driving device 210 from being damaged by the short-circuit current instantaneously applied to the capacitor. When the power distribution control module 300 of the high-voltage system of the electric automobile controls the third switch K3 and the fourth switch K4 to be turned on, the high-voltage battery 400 can be turned on with the discharge loop of the external driving device 210, so that the external driving device 210 can work normally under the working voltage. When the power distribution control module 300 of the high-voltage system of the electric automobile controls the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4 to be turned on, and the first switch K1 and the second switch K2 are connected with an external power supply, the high-voltage battery 400 can be turned on with a charging loop of the external power supply, and the high-voltage battery 400 is charged. Therefore, the high-voltage distribution system of the electric automobile can enable different functional loops to be communicated by conducting different switches.
Optionally, with continued reference to fig. 3, the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, and the fifth switch K5 all employ relays.
The relay is an electric control device, when the relay is electrified, the switch can be controlled to be closed or opened, and when the relay is deenergized, the switch can be controlled to be opened or closed. For example, if the relay is a normally open switch, the relay power-on switch is closed and the relay power-off switch is opened; if the relay is a normally closed switch, the relay power-on switch is opened, and the relay power-off switch is closed. Specifically, the relays adopted by the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5 are all normally open switches. The on-state of the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5 can thereby be controlled by powering on or off the relay.
The embodiment of the invention also provides a detection method for the high-voltage power distribution of the electric automobile, which is used for detecting the high-voltage power distribution system of the electric automobile in any one of the above embodiments. Fig. 4 is a schematic flow chart of a high-voltage power distribution detection method for an electric automobile, which is provided by the embodiment of the invention, as shown in fig. 4, and specifically includes the following steps:
S410, the power distribution control module receives the control signal sent by the high-voltage detection module and controls the power distribution module to gate different connection loops according to the control signal.
S420, the high-voltage detection module detects the voltage of the power distribution module connection loop and confirms the fault state of the power distribution module according to the voltage of the power distribution module connection loop.
According to the embodiment of the invention, the power distribution control module can receive the control signal sent by the high-voltage detection module and control the power distribution module to gate different connection loops according to the control signal; the high-voltage detection module can detect the voltage of the power distribution module connection loop and confirm the fault state of the power distribution module according to the voltage of the power distribution module connection loop. Therefore, fault detection of the power distribution module can be realized, and the comprehensiveness and safety of power-on fault self-detection of the high-voltage power distribution system of the electric automobile are improved.
Optionally, the power distribution module includes a first charging control module, a second charging control module, a first total control module, a second total control module, a pre-charging control module, and a pre-charging current limiting module;
the second end of the first charge control module is connected with the negative end of the external driving device and the first end of the first total control module, the second end of the first total control module is connected with the negative end of the high-voltage battery, the positive end of the high-voltage battery is connected with the second end of the second total control module and the second end of the pre-charge control module, the first end of the second total control module is connected with the second end of the second charge control module, the first end of the pre-charge current limiting module and the positive end of the external driving device, and the second end of the pre-charge current limiting module is connected with the first end of the pre-charge control module; wherein the external driving device comprises two front drivers and two rear drivers;
The high-voltage detection module is connected with the second end of the pre-charge control module, the first end of the second general control module, the first end of the second charge control module, the first end of the first charge control module and the second end of the first general control module;
the power distribution control module is connected with the high-voltage detection module, the first charging control module, the second charging control module, the first total control module, the second total control module and the pre-charging control module;
the power distribution control module receives the control signal sent by the high-voltage detection module and controls the conduction states of the first charging control module, the second charging control module, the first total control module, the second total control module and the pre-charging control module according to the control signal;
the high-voltage detection module detects the voltage difference between the first end of the pre-charge control module, the second end of the pre-charge control module, the first end of the second total control module or the first end of the second charge control module and the second end of the first total control module according to the conducting states of the first charge control module, the second charge control module, the first total control module and the pre-charge control module, and the voltage difference between the first end of the second charge control module and the first end of the first charge control module, and determines the fault states of the first charge control module, the second charge control module, the first total control module, the second total control module, the pre-charge control module and the pre-charge current limiting module according to the voltage difference.
Specifically, fig. 5 is a schematic flow chart of another method for detecting high-voltage power distribution of an electric automobile according to an embodiment of the present invention. When the high-voltage distribution system of the electric automobile is electrified, the specific method for comprehensively detecting faults of the first charging control module, the second charging control module, the first total control module, the second total control module, the pre-charging control module and the pre-charging current limiting module under the cooperation of the high-voltage detection module and the distribution control module comprises the following steps:
s510, the power distribution control module receives a first control signal of the high-voltage detection module and controls the first charging control module, the second charging control module, the first total control module, the second total control module and the pre-charging control module to be disconnected according to the first control signal;
s520, the high-voltage detection module detects voltage differences between the first end of the pre-charge control module and the second end of the second total control module, and judges whether the pre-charge control module and the second total control module have adhesion faults or not according to the voltage differences between the first end of the pre-charge control module and the first end of the second total control module and the second end of the first total control module.
S530, when the high-voltage detection module does not have adhesion faults in the pre-charge control module and the second main control module, a second control signal is sent to the power distribution control module, and the power distribution control module controls the pre-charge control module to be conducted according to the second control signal;
S540, the high-voltage detection module detects voltage differences between the first end of the pre-charge control module and the second end of the second total control module and the second end of the first total control module respectively, and judges whether the pre-charge control module and the pre-charge current limiting module have open-circuit faults or not according to the voltage differences between the first end of the pre-charge control module and the first end of the second total control module and the second end of the first total control module respectively.
S550, when the pre-charging control module and the pre-charging current limiting module do not have the open-circuit fault, the high-voltage detection module judges whether the first main control module has the adhesion fault or not according to the voltage change of the first end of the pre-charging control module and the second end of the first main control module.
S560, when the first total control module does not have adhesion fault, the high-voltage detection module sends a third control signal to the power distribution control module, and the power distribution control module controls the first total control module to be conducted and the pre-charging control module to be disconnected according to the third control signal;
s570, the high-voltage detection module detects a voltage difference between the first end of the second total control module and the second end of the first total control module, and judges whether the second total control module has adhesion failure according to the voltage difference between the first end of the second total control module and the second end of the first total control module.
S580, when the second main control module does not have adhesion fault, the high-voltage detection module sends a fourth control signal to the power distribution control module, and the power distribution control module controls the second main control module to be conducted according to the fourth control signal;
s590, the high-voltage detection module detects a voltage difference between the first end of the second charge control module and the second end of the first total control module, and judges whether the second charge control module has adhesion failure according to the voltage difference between the first end of the second charge control module and the second end of the first total control module.
S600, when the second charging control module does not have adhesion failure, the high-voltage detection module sends a fifth control signal to the power distribution control module, and the power distribution control module controls the second charging control module to be conducted according to the fifth control signal;
s610, the high-voltage detection module detects a voltage difference between the first end of the second charging control module and the first end of the first charging control module, and judges whether the first charging control module has adhesion failure or not according to the voltage difference between the first end of the second charging control module and the first end of the first charging control module.
The embodiment of the invention also provides an electric automobile, and fig. 6 is a schematic structural diagram of the electric automobile. As shown in fig. 6, the electric vehicle includes the electric vehicle high-voltage distribution system 001, the two front drivers 002, and the two rear drivers 003 of any of the above embodiments; the power distribution module in the high-voltage power distribution system 001 of the electric automobile is respectively connected with two front drivers 002 and two rear drivers 003; an electric car high voltage power distribution system 001 is used to power the front and rear drives 002, 003.
Specifically, the external driving device includes two front drivers 002 and two rear drivers 003, that is, the negative ends of the two front drivers 002 and the negative ends of the two rear drivers 003 are both connected to the first end of the first general control module 130 in the electric vehicle high voltage distribution system 001, and the positive ends of the two front drivers 002 and the positive ends of the two rear drivers 003 are both connected to the first end of the second general control module 140 in the electric vehicle high voltage distribution system 001. Thus, when the first and second total control modules 130 and 140 are in the on state, the high-voltage battery 400 in the electric automobile high-voltage distribution system 001 forms a conductive loop with the two front drivers 002 and the two rear drivers 003 respectively, so that the high-voltage battery 400 is implemented to supply power to the two front drivers 002 and the two rear drivers 003. In addition, the electric automobile comprises the electric automobile high-voltage power distribution system 001 provided by any embodiment of the invention, so that the electric automobile high-voltage power distribution system 001 provided by the embodiment of the invention has the beneficial effects and is not described herein.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (11)

1. An electric vehicle high voltage power distribution system, comprising: the power distribution system comprises a power distribution module, a high-voltage detection module, a power distribution control module and a high-voltage battery;
the power distribution module is respectively connected with the high-voltage detection module, the power distribution control module and the high-voltage battery, and the power distribution control module is connected with the high-voltage detection module;
the power distribution control module is used for receiving the control signal sent by the high-voltage detection module and controlling the power distribution module to gate different connection loops according to the control signal;
the high-voltage detection module is used for detecting the voltage of the power distribution module connecting loop and confirming the fault state of the power distribution module according to the voltage of the power distribution module connecting loop;
the power distribution module comprises a first charging control module, a second charging control module, a first total control module, a second total control module, a pre-charging control module and a pre-charging current limiting module;
the second end of the first charge control module is connected with the negative end of the external driving device and the first end of the first total control module, the second end of the first total control module is connected with the negative end of the high-voltage battery, the positive end of the high-voltage battery is connected with the second end of the second total control module and the second end of the pre-charge control module, the first end of the second total control module is connected with the second end of the second charge control module, the first end of the pre-charge current limiting module and the positive end of the external driving device, and the second end of the pre-charge current limiting module is connected with the first end of the pre-charge control module; wherein the external driving device comprises two front drivers and two rear drivers; the high-voltage detection module is connected with the second end of the pre-charging control module, the first end of the second general control module, the first end of the second charging control module, the first end of the first charging control module and the second end of the first general control module;
The power distribution control module is connected with the high-voltage detection module, the first charging control module, the second charging control module, the first total control module, the second total control module and the pre-charging control module;
the power distribution control module is used for receiving the control signal sent by the high-voltage detection module and controlling the conduction states of the first charging control module, the second charging control module, the first total control module, the second total control module and the pre-charging control module according to the control signal;
the high voltage detection module is configured to detect a voltage difference between a first end of the pre-charge control module, a second end of the pre-charge control module, or a first end of the second charge control module and a second end of the first total control module, and a voltage difference between a first end of the second charge control module and a first end of the first charge control module according to a conduction state of the first charge control module, the second total control module, and the pre-charge control module, and a fault state of the first charge control module, the second charge control module, the first total control module, the second total control module, the pre-charge control module, and the pre-charge current limiting module according to the voltage difference.
2. The electric vehicle high-voltage power distribution system of claim 1, wherein the power distribution control module is configured to receive a first control signal of the high-voltage detection module, and control the first charging control module, the second charging control module, the first overall control module, the second overall control module, and the pre-charging control module to be disconnected according to the first control signal;
the high-voltage detection module is used for detecting the voltage difference between the first end of the pre-charge control module and the first end of the second total control module and the second end of the first total control module, and judging whether the pre-charge control module and the second total control module have adhesion faults or not according to the voltage difference between the first end of the pre-charge control module and the first end of the second total control module and the second end of the first total control module.
3. The electric automobile high-voltage distribution system according to claim 2, wherein the high-voltage detection module is configured to send a second control signal to the distribution control module when no adhesion failure occurs in both the pre-charging control module and the second master control module, and the distribution control module is configured to control the pre-charging control module to be turned on according to the second control signal;
The high-voltage detection module is used for detecting the voltage difference between the first end of the pre-charge control module and the first end of the second total control module and the second end of the first total control module, and judging whether the pre-charge control module and the pre-charge current limiting module have circuit breaking faults or not according to the voltage difference between the first end of the pre-charge control module and the first end of the second total control module and the second end of the first total control module.
4. The electric vehicle high-voltage distribution system of claim 3, wherein when the pre-charge control module and the pre-charge current limiting module do not have an open circuit fault, the high-voltage detection module is further configured to determine whether the first total control module has an adhesion fault according to a voltage change between the first end of the pre-charge control module and the second end of the first total control module.
5. The electric automobile high-voltage distribution system of claim 4, wherein the high-voltage detection module is configured to send a third control signal to the distribution control module when the first main control module has no adhesion fault, the distribution control module is configured to control the first main control module to be turned on and the pre-charge control module to be turned off according to the third control signal;
The high-voltage detection module is used for detecting the voltage difference between the first end of the second total control module and the second end of the first total control module, and judging whether the second total control module has adhesion failure or not according to the voltage difference between the first end of the second total control module and the second end of the first total control module.
6. The electric automobile high-voltage distribution system of claim 5, wherein the high-voltage detection module is configured to send a fourth control signal to the distribution control module when the second master control module has no adhesion fault, and the distribution control module is configured to control the second master control module to be turned on according to the fourth control signal;
the high-voltage detection module is used for detecting the voltage difference between the first end of the second charging control module and the second end of the first total control module, and judging whether the second charging control module has adhesion failure or not according to the voltage difference between the first end of the second charging control module and the second end of the first total control module.
7. The electric automobile high voltage distribution system of claim 6, wherein the high voltage detection module is configured to send a fifth control signal to the distribution control module when the second charging control module has no adhesion fault, and the distribution control module is configured to control the second charging control module to be turned on according to the fifth control signal;
The high-voltage detection module is used for detecting the voltage difference between the first end of the second charging control module and the first end of the first charging control module, and judging whether the first charging control module has adhesion failure or not according to the voltage difference between the first end of the second charging control module and the first end of the first charging control module.
8. The electric vehicle high voltage power distribution system of claim 1, wherein the first charge control module comprises a first switch, the second charge control module comprises a second switch, the first total control module comprises a third switch, the second total control module comprises a fourth switch, the precharge control module comprises a fifth switch, and the precharge current limiting module comprises a resistor.
9. The electric vehicle high voltage power distribution system of claim 8, wherein the first switch, the second switch, the third switch, the fourth switch, and the fifth switch each employ a relay.
10. A method for detecting a high voltage power distribution system of an electric vehicle, performed by the high voltage power distribution system of an electric vehicle according to any one of claims 1 to 9, comprising:
The power distribution control module receives the control signal sent by the high-voltage detection module and controls the power distribution module to gate different connection loops according to the control signal;
the high-voltage detection module detects the voltage of the power distribution module connecting loop and confirms the fault state of the power distribution module according to the voltage of the power distribution module connecting loop;
the power distribution module comprises a first charging control module, a second charging control module, a first total control module, a second total control module, a pre-charging control module and a pre-charging current limiting module;
the second end of the first charge control module is connected with the negative end of the external driving device and the first end of the first total control module, the second end of the first total control module is connected with the negative end of the high-voltage battery, the positive end of the high-voltage battery is connected with the second end of the second total control module and the second end of the pre-charge control module, the first end of the second total control module is connected with the second end of the second charge control module, the first end of the pre-charge current limiting module and the positive end of the external driving device, and the second end of the pre-charge current limiting module is connected with the first end of the pre-charge control module; wherein the external driving device comprises two front drivers and two rear drivers;
The high-voltage detection module is connected with the second end of the pre-charging control module, the first end of the second general control module, the first end of the second charging control module, the first end of the first charging control module and the second end of the first general control module;
the power distribution control module is connected with the high-voltage detection module, the first charging control module, the second charging control module, the first total control module, the second total control module and the pre-charging control module;
the power distribution control module receives the control signal sent by the high-voltage detection module and controls the conduction states of the first charging control module, the second charging control module, the first total control module, the second total control module and the pre-charging control module according to the control signal;
the high-voltage detection module detects a voltage difference between a first end of the pre-charge control module, a second end of the pre-charge control module, or a first end of the second charge control module and a second end of the first total control module, and a voltage difference between a first end of the second charge control module and a first end of the first charge control module according to a conduction state of the first charge control module, the second total control module and the pre-charge control module, and determines fault states of the first charge control module, the second charge control module, the first total control module, the second total control module, the pre-charge control module and the pre-charge current limiting module according to the voltage difference.
11. An electric vehicle, characterized by comprising an electric vehicle high voltage power distribution system according to any one of claims 1-9, two front drives and two rear drives;
the power distribution module in the electric automobile high-voltage power distribution system is respectively connected with the two front drivers and the two rear drivers; the electric automobile high-voltage distribution system is used for supplying power to the front driver and the rear driver.
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