CN114013283A - 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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Publication number
CN114013283A
CN114013283A CN202111521033.7A CN202111521033A CN114013283A CN 114013283 A CN114013283 A CN 114013283A CN 202111521033 A CN202111521033 A CN 202111521033A CN 114013283 A CN114013283 A CN 114013283A
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control module
module
voltage
charging
power distribution
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CN114013283B (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

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 device 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 scheme can realize fault detection of the power distribution module, thereby improving the comprehensiveness and safety of power-on fault self-detection of the high-voltage power distribution system of the electric automobile.

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 power distribution system of the electric automobile is a high-voltage power distribution unit of all pure electric automobiles and plug-in hybrid electric automobiles, adopts a centralized power distribution scheme, and has the characteristics of compact design structure, convenient wiring layout, easy maintenance and the like. In addition, aiming at the system architecture requirements of different customers, the high-voltage power distribution system of the electric automobile can integrate 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, in most high-voltage distribution systems of electric vehicles in the market, the charging relay and the discharging relay are in parallel connection, once the charging relay is adhered and fails, the high-voltage battery is overcharged and damaged, and even accidents such as fire and explosion can be caused. At present, most methods for detecting the adhesion of the relay adopt a voltage comparison method, namely, voltages of the front end and the rear end of the relay are compared, so that whether the relay is adhered or failed is judged. However, the comparative voltage method cannot determine an open-circuit fault of the relay or an open-circuit fault of the pre-charging 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, which are used for realizing fault detection when the high-voltage power distribution system is electrified, so that the comprehensiveness and safety of the electric automobile high-voltage power distribution system electrification fault self-detection are improved.
In a first aspect, an embodiment of the present invention provides an electric vehicle high voltage power distribution system, which includes: the device 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.
Optionally, the power distribution module comprises: the device comprises a first charging control module, a second charging control module, a first master control module, a second master control module, a pre-charging control module and a pre-charging current-limiting module;
the second end of the first charging control module is connected with the negative end of an external driving device and the first end of the first master control module, the second end of the first master control module is connected with the negative end of a high-voltage battery, the positive end of the high-voltage battery is connected with the second end of the second master control module and the second end of the pre-charging control module, the first end of the second master control module is connected with the second end of the second charging control module, the first end of the pre-charging current-limiting module and the positive end of the external driving device, and the second end of the pre-charging current-limiting module is connected with the first end of the pre-charging 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 master 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 master 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 master control module, the second master 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 master control module, the second master control module and the pre-charging control module according to the control signal;
the high-voltage detection module is used for detecting the voltage difference between the first end of the pre-charging control module, the second end of the pre-charging control module, the first end of the second main control module or between the first end of the second main control module and the second end of the first main control module and the voltage difference between the first end of the second charging control module and the first end of the first charging control module according to the conduction states of the first charging control module, the second charging control module, the first main control module, the second main control module, the pre-charging control module and the pre-charging current-limiting module.
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 general control module, the second general 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-charging control module and the first end of the second master control module and the second end of the first master control module respectively, and judging whether the pre-charging control module and the second master control module have adhesion faults or not according to the voltage difference between the first end of the pre-charging control module and the first end of the second master control module and the second end of the first master control module respectively.
Optionally, the high-voltage detection module is configured to send a second control signal to the power distribution control module when neither the pre-charging control module nor the second general control module has an adhesion fault, and the power 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-charging control module and the first end of the second master control module and the second end of the first master control module respectively, and judging whether the pre-charging control module and the pre-charging current-limiting module break or not according to the voltage difference between the first end of the pre-charging control module and the first end of the second master control module and the second end of the first master control module respectively.
Optionally, when the open-circuit fault does not occur in the pre-charge control module and the pre-charge current-limiting module, the high-voltage detection module is further configured to determine whether the first master control module has the adhesion fault according to a voltage change between the first end of the pre-charge control module and the second end of the first master control module.
Optionally, the high-voltage detection module is configured to send a third control signal to the power distribution control module when the first main control module has no adhesion fault, the power distribution control module is configured to control the first main control module to be turned on according to the third control signal, and the pre-charging control module is turned off;
the high-voltage detection module is used for detecting the voltage difference between the first end of the second master control module and the second end of the first master control module, and judging whether the second master control module has adhesion faults or not according to the voltage difference between the first end of the second master control module and the second end of the first master control module.
Optionally, the high-voltage detection module is configured to send a fourth control signal to the power distribution control module when the second master control module has no adhesion fault, and the power distribution control module is configured to control the second master 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 master control module, and judging whether the second charging control module has adhesion faults or not according to the voltage difference between the first end of the second charging control module and the second end of the first master control module.
Optionally, the high-voltage detection module is configured to send a fifth control signal to the power distribution control module when the second charging control module does not generate an adhesion fault, and the power 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 fault 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 adopt 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 vehicle, for detecting the high-voltage power distribution detection system of the electric vehicle in any one of the above embodiments, where 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 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.
Optionally, the power distribution module includes a first charging control module, a second charging control module, a first general control module, a second general control module, a pre-charging control module, and a pre-charging current-limiting module;
the second end of the first charging control module is connected with the negative end of an external driving device and the first end of the first master control module, the second end of the first master control module is connected with the negative end of a high-voltage battery, the positive end of the high-voltage battery is connected with the second end of the second master control module and the second end of the pre-charging control module, the first end of the second master control module is connected with the second end of the second charging control module, the first end of the pre-charging current-limiting module and the positive end of the external driving device, and the second end of the pre-charging current-limiting module is connected with the first end of the pre-charging 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 master 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 master 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 master control module, the second master 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 master control module, the second master 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-charging control module, a second end of the pre-charging control module, a first end of the second master control module or between the first end of the second master control module and a second end of the first master control module, and a voltage difference between the first end of the second charging control module and a first end of the first charging control module according to the conduction states of the first charging control module, the second charging control module, the first master control module, the second master control module, the pre-charging control module and the pre-charging current-limiting module, and determines a fault state of the first charging control module, the second charging control module, the first master control module, the second master control module, the pre-charging control module and the pre-charging current-limiting module according to the voltage difference.
In a third aspect, an embodiment of the present invention further provides an electric vehicle, which includes the electric vehicle high-voltage power distribution system in any one of the above embodiments, two front drivers, and two rear drivers;
a 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 high-voltage power distribution system of the electric automobile 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 connecting loop and confirm the fault state of the power distribution module according to the voltage of the power distribution module connecting loop. Therefore, the fault detection of the power distribution module can be realized, and the comprehensiveness and safety of the power-on fault self-detection of the high-voltage power distribution system of the electric automobile are improved.
Drawings
To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description, although being some specific embodiments of the present invention, can be extended and extended to other structures and drawings by those skilled in the art according to the basic concepts of the device structure, the driving method and the manufacturing method disclosed and suggested by the various embodiments of the present invention, without making sure that these should be within the scope of the claims of the present invention.
Fig. 1 is a schematic structural diagram of an electric vehicle high-voltage power distribution system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another electric vehicle high-voltage power distribution system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another electric vehicle high-voltage power distribution system 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 vehicle according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of another method for detecting high-voltage distribution of an electric vehicle 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
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides an electric automobile high-voltage power distribution system, and fig. 1 is a schematic structural diagram of the electric automobile high-voltage power distribution system provided by the embodiment of the invention. As shown in fig. 1, the high-voltage distribution system of the electric vehicle 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 used for detecting the voltage of the connection loop of the power distribution module 100 and confirming the 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 to 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 power distribution with different functions. The power distribution module 100 is connected to the high voltage detection module 200, and the high voltage detection module 200 can perform voltage detection on the lines connected to the inside of the power distribution module 100 during the process of gating the connection loop of the power distribution module 100, so as to determine whether the lines inside the power distribution module 100 are faulty or not. The power distribution control module 300 is connected to the high voltage detection module 200, and if the high voltage detection module 200 determines that the line inside the power distribution module 100 is not faulty, the high voltage detection module 200 also sends a control signal to the power distribution control module 300, so that the power distribution control module 100 is controlled to continue to 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 connecting loop and confirm the fault state of the power distribution module according to the voltage of the power distribution module connecting loop. Therefore, the fault detection of the power distribution module can be realized, and the comprehensiveness and safety of the 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 electric vehicle high-voltage power distribution system according to an embodiment of the present invention. As shown in fig. 2, the power distribution module includes: the charging control system comprises a first charging control module 110, a second charging control module 120, a first general control module 130, a second general control module 140, a pre-charging control module 150 and a pre-charging current-limiting module 160;
the second end of the first charging control module 110 is connected with the negative end of the external driving device 210 and the first end of the first general control module 130, the second end a2 of the first general control module 130 is connected with the negative end of the high voltage battery 400, the positive end of the high voltage battery 400 is connected with the second end of the second general control module 140 and the second end B4 of the pre-charging control module 150, the first end B2 of the second general control module 140 is connected with the second end of the second charging control module 120, the first end of the pre-charging current-limiting module 160 and the positive end of the external driving device 210, and the second end of the pre-charging current-limiting module 160 is connected with the first end B3 of the pre-charging 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 with the second end B4 of the pre-charging control module 150, the first end B3 of the pre-charging control module 150, the first end B2 of the second general control module 140, the first end B1 of the second charging control module 120, the first end a1 of the first charging control module 110, and the second end a2 of the first general 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 general control module 130, the second general control module 140 and the pre-charging control module 150;
the power distribution control module 300 is configured to receive a control signal sent by the high voltage detection module 200, and control the conduction states of the first charging control module 110, the second charging control module 120, the first master control module 130, the second master control module 140, and the precharge 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 precharge control module 150, the second terminal B4 of the precharge control module 150, the first terminal B2 of the second general control module 140, or the first terminal B1 of the second charge control module 120 and the second terminal a2 of the first general 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 conduction states of the first charge control module 110, the second charge control module 120, the first general control module 130, the second general control module 140, the precharge control module 150, and the precharge current limiting module 150, and determine a fault state of the first charge control module 110, the second charge control module 120, the first general control module 130, the second general control module 140, the precharge control module 150, and the precharge current limiting module 160 according to the voltage differences.
The high-voltage power 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 above connection relationship and the functions of the functional modules, when the power distribution control module 300 of the high voltage system of the electric vehicle controls the pre-charge control module 150 and the first master control module 130 to be conducted, the high voltage battery 400 can be conducted with the pre-charge circuit of the external driving device 210, so as to pre-charge the external driving device 210. The pre-charging current limiting module 160 on the pre-charging loop 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 capacitor instantaneous short-circuit current. When the power distribution control module 300 of the high-voltage system of the electric vehicle controls the first master control module 130 and the second master control module 140 to be conducted, the discharge circuit of the high-voltage battery 400 and the external driving device 210 can be conducted, so that the external driving device 210 can normally work under the working voltage. When the power distribution control module 300 of the high-voltage system of the electric vehicle controls the first master control module 130, the second master control module 140, the first charging control module 110 and the second charging control module 120 to be conducted, 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 to an external power source, so that the high-voltage battery 400 is conducted with a charging loop of the external power source to charge the high-voltage battery 400. Therefore, whether the first master control module 130, the second master control module 140, the pre-charging control module 150 and the pre-charging current-limiting module 160 in the high-voltage distribution system of the electric vehicle can work normally is directly related to whether the electric vehicle can be used normally. Whether the first charging control module 110, the second charging control module 120, the first master control module 130 and the second master control module 140 in the high-voltage distribution system of the electric vehicle can work normally or not is directly related to the charging safety of the electric vehicle. According to the scheme, when the high-voltage distribution system of the electric automobile is powered on, the high-voltage detection module 200 is used for sending a control signal to the distribution control module 300, so that the distribution control module 300 is communicated with different lines, the high-voltage detection module 200 selectively detects the voltage difference between the first end B3 of the pre-charging control module 150, the second end B4 of the pre-charging control module 150, the first end B2 of the second general control module 140 or the first end B1 of the second charging control module 120 and the second end A2 of the first general control module 130, and the voltage difference between the first end B1 of the second charging control module 120 and the first end A1 of the first charging control module 110 in different connection lines, so that the first charging control module 110, the second charging control module 120, the first general control module 130, the second general control module 140, the pre-charging control module 150 and the pre-charging current-limiting module 160 are subjected to fault troubleshooting one by one, and the detection comprehensiveness of the detection of the high-voltage detection module 200 is ensured, thereby increasing the safety of the electric automobile.
In summary, when the high voltage distribution system of the electric vehicle is powered on, the high voltage detection module is used to send a control signal to the distribution control module, so that the distribution control module is connected to different lines, and 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, and the voltage difference between the first end of the second charge control module and the first end of the first charge control module in different connection lines, so as to implement one-by-one fault troubleshooting on 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, so that each module of the high voltage distribution system of the electric vehicle is in a fault-free condition, the realization is carried out the preliminary filling to external drive arrangement, is supplied power and is charged high voltage battery through being connected with external power source to external drive arrangement, has improved the security that electric automobile high voltage power distribution system used. In addition, when the high-voltage distribution system of the electric automobile is connected with an external power supply to charge the 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 master control module and the second master control module.
When electric automobile high voltage distribution system goes up the electricity, carry out comprehensive fault detection to first charging control module, second charging control module, first total control module, the total control module of second, pre-charge control module, pre-charge current-limiting module under the cooperation of high pressure detection module and distribution control module, specifically do:
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 general control module 130, the second general 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 a first end B3 of the precharge control module 150 and a first end B2 of the second master control module 140 and a second end a2 of the first master control module 130, and determine whether an adhesion fault occurs between the precharge control module 150 and the second master control module 140 according to voltage differences between a first end B3 of the precharge control module 150 and a first end B2 of the second master control module 140 and a second end a2 of the first master control module 130.
Specifically, when the electric vehicle high-voltage power distribution system is powered on, the power distribution control module 300 may receive the first control signal sent by the high-voltage detection module 200, and the power distribution control module 300 may 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 precharge control module 150 to be all turned off, and at this time, all functional loops of the electric vehicle high-voltage power distribution system are not turned on. The voltage difference between the first terminal B3 of the precharge control module 150 and the first terminal B2 of the second general control module 140 and the second terminal a2 of the first general 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 master 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 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 will determine that at least one of the pre-charge control module 150 and the second master 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 general control module 130 is equal to 0V, and the voltage difference between the first end B2 of the second general control module 140 and the second end a2 of the first general control module 130 is equal to 0V, the high voltage detection module 200 determines that neither the pre-charge control module 150 nor the second general control module 140 has adhesion failure.
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 neither the pre-charge control module 150 nor the second general control module 140 has an adhesion fault, where the power distribution control module 300 is configured to control the pre-charge 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 precharge control module 150 and the first end B2 of the second general control module 140 and the second end a2 of the first general control module 130, and determine whether an open circuit fault occurs in the precharge control module 150 and the precharge current-limiting module 160 according to voltage differences between the first end B3 of the precharge control module 150 and the first end B2 of the second general control module 140 and the second end a2 of the first general control module 130.
When the high voltage detection module 200 determines that neither the pre-charge control module 150 nor the second general control module 140 has a fault, the power distribution control module 300 receives a 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 a voltage difference between the first terminal B3 of the precharge control module 150 and the first terminal B2 of the second general control module 140 and the second terminal a2 of the first general 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 bus control module 130 is equal to 0V, and the voltage difference between the first end B2 of the second bus control module 140 and the second end a2 of the first bus control module 130 is equal to 0V, the high voltage detection module 200 will determine that the pre-charge control module 150 has an open circuit fault; if the voltage difference between the first terminal B3 of the pre-charge control module 150 and the second terminal a2 of the first bus control module 130 is equal to the voltage of the high voltage battery 400, and the voltage difference between the first terminal B2 of the second bus control module 140 and the second terminal a2 of the first bus control module 130 is equal to 0V, the high voltage detection module 200 will determine 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 neither the pre-charge control module 150 nor the pre-charge current limiting module 160 has an open circuit fault.
Optionally, with continued reference to fig. 2, when the open-circuit fault does not occur in the pre-charge control module 150 and the pre-charge current-limiting module 160, the high voltage detection module 200 is further configured to determine whether the first general control module 130 has the adhesion fault according to the voltage variation 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 neither the pre-charge control module 150 nor the pre-charge current-limiting module 160 has the open-circuit fault, the high voltage detection module 200 also determines whether the first general control module 130 has the adhesion fault according to the voltage changes of 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 general control module 130 is not equal to 0V nor equal to the voltage of the high-voltage battery 400, and the voltage difference between the first end B2 of the second general control module 140 and the second end a2 of the first general control module 130 is not equal to 0V nor equal to the voltage of the high-voltage battery 400, the high-voltage detection module 200 may determine that the first general control module 130 has an adhesion fault; if the voltage difference between the first end B3 of the precharge control module 150 and the second end a2 of the first master 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 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 will determine that the first master control module 130 has no adhesion fault.
Optionally, with 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 main control module 130 does not have an adhesion fault, where the power distribution control module 300 is configured to control the first main control module 130 to be turned on according to the third control signal, and the pre-charging control module 150 is turned off; the high voltage detection module 200 is configured to detect a voltage difference between the first end B1 of the second master control module 140 and the second end a2 of the first master control module 130, and determine whether an adhesion fault occurs in the second master control module 140 according to a 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.
When the high voltage detection module 200 determines that the first master control module 130 is not in the adhesion fault, the power distribution control module 300 receives a third control signal sent by the high voltage detection module 200, and the power distribution control module 300 controls the first master control module 130 to be turned on and the pre-charging control module 150 to be turned off. At this time, the high voltage detecting module 200 detects a voltage difference between the first terminal B2 of the second general control module 140 and the second terminal a2 of the first general control module 130. If the voltage difference between the first end B2 of the second general control module 140 and the second end a2 of the first general control module 130 is equal to the voltage of the high voltage battery 400, the high voltage detection module 200 will determine that the second general control module 140 has an adhesion fault; if the voltage difference between the first end B2 of the second general control module 140 and the second end a2 of the first general control module 130 is equal to 0V, the high voltage detection module 200 will determine that the second general control module 140 has no adhesion fault.
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 general control module 140 does not have an adhesion fault, and the power distribution control module 300 is configured to control the second general control module 140 to be turned on according to the fourth control signal; the high voltage detecting module 200 is configured to detect a voltage difference between the first terminal B1 of the second charging control module 120 and the second terminal a2 of the first bus control module 130, and determine whether an adhesion fault occurs in the second charging control module 120 according to a voltage difference between the first terminal B1 of the second charging control module 120 and the second terminal a2 of the first bus control module 130.
When the high voltage detection module 200 determines that the second general control module 140 does not have an adhesion fault, the power distribution control module 300 receives a fourth control signal sent by the high voltage detection module 200, and the power distribution control module 300 controls the second general control module 140 to be conducted. At this time, the high voltage detecting module 200 detects a voltage difference between the first terminal B1 of the second charging control module 120 and the second terminal of the first bus control module 130. If the voltage difference between the first end of the second charging control module 120 and the second end a2 of the first bus control module 130 is equal to the voltage of the high voltage battery 400, the high voltage detection module 200 may determine that the second charging control module 120 has an adhesion fault; if the voltage difference between the first terminal B1 of the second charging control module 120 and the second terminal a2 of the first bus control module 130 is equal to 0V, the high voltage detection module 200 determines that the second charging control module 120 has no adhesion fault.
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 does not generate the adhesion fault, and the power distribution control module 300 is configured to control the second charging control module 120 to conduct according to the fifth control signal; the high voltage detection module 200 is configured to detect a voltage difference between the first terminal B1 of the second charging control module 120 and the first terminal a1 of the first charging control module 110, and determine whether a sticking fault occurs in the first charging control module 110 according to a voltage difference between the first terminal B1 of the second charging control module 120 and the first terminal a1 of the first charging control module 110.
When the high-voltage detection module 200 determines that the second charging control module 120 does not have the adhesion fault, the power distribution control module 300 may receive a fifth control signal sent by the high-voltage detection module 200, and the power distribution control module 300 may control 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 charging control module 120 and the first terminal a1 of the first charging control module 110. If the voltage difference between the first terminal B1 of the second charging control module 120 and the first terminal a1 of the first charging control module 110 is equal to the voltage of the high voltage battery 400, the high voltage detection module 200 may determine that the first charging control module 110 has the adhesion fault; if the voltage difference between the first terminal B1 of the second charging control module 120 and the first terminal a1 of the first charging control module 110 is equal to 0V, the high voltage detection module 200 determines that the first charging control module 110 has no adhesion fault.
Fig. 3 is a schematic structural diagram of another high-voltage power distribution system of an electric vehicle according to an embodiment of the present invention, as shown in fig. 3, a first charging control module 110 includes a first switch K1, a second charging control module 120 includes a second switch K2, a first general control module 130 includes a third switch K3, a second general control module 140 includes a fourth switch K4, a precharge control module 150 includes a fifth switch K5, and a precharge 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 connected by controlling the conduction 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 vehicle controls the fifth switch K5 and the third switch K3 to be turned on, the high voltage battery 400 may be turned on with the pre-charging circuit of the external driving device 210, so as to pre-charge 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 capacitor instantaneous short-circuit current. When the power distribution control module 300 of the high voltage system of the electric vehicle controls the third switch K3 and the fourth switch K4 to be turned on, the high voltage battery 400 and the discharge circuit of the external driving device 210 can be turned on, so that the external driving device 210 normally operates at the operating voltage. When the power distribution control module 300 of the high-voltage system of the electric vehicle controls the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4 to be switched on and the first switch K1 and the second switch K2 are connected with the external power supply, the high-voltage battery 400 can be switched on with a charging loop of the external power supply to charge the high-voltage battery 400. Therefore, the high-voltage power distribution system of the electric automobile can be communicated with different functional circuits 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, and when the relay is powered on, the switch can be controlled to be closed or opened, and when the relay is powered off, the switch can be controlled to be opened or closed. For example, if the relay is a normally open switch, the power-on switch of the relay is closed, and the power-off switch of the relay is opened; if the relay is a normally closed switch, the power-on switch of the relay is switched off, and the power-off switch of the relay is switched on. Specifically, the relays used for 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 states of the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, and the fifth switch K5 can thus be controlled by powering the relay on or off.
The embodiment of the invention also provides a high-voltage power distribution detection method for the electric automobile, which is used for detecting the high-voltage power distribution system of the electric automobile in any one of the embodiments. Fig. 4 is a schematic flow chart of a method for detecting high-voltage power distribution of an electric vehicle according to an embodiment of the present invention, and as shown in fig. 4, the method for detecting high-voltage power distribution of an electric vehicle specifically includes the following steps:
and 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.
And S420, detecting the voltage of the power distribution module connecting loop by the high-voltage detection module, and confirming the fault state of the power distribution module according to the voltage of the power distribution module connecting 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 connecting loop and confirm the fault state of the power distribution module according to the voltage of the power distribution module connecting loop. Therefore, the fault detection of the power distribution module can be realized, and the comprehensiveness and safety of the 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 general control module, a second general control module, a pre-charging control module, and a pre-charging current-limiting module;
the second end of the first charging control module is connected with the negative end of an external driving device and the first end of the first master control module, the second end of the first master control module is connected with the negative end of a high-voltage battery, the positive end of the high-voltage battery is connected with the second end of the second master control module and the second end of the pre-charging control module, the first end of the second master control module is connected with the second end of the second charging control module, the first end of the pre-charging current-limiting module and the positive end of the external driving device, and the second end of the pre-charging current-limiting module is connected with the first end of the pre-charging 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 master 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 master 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 master control module, the second master 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 master control module, the second master 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-charging control module, a second end of the pre-charging control module, a first end of the second master control module or between the first end of the second master control module and a second end of the first master control module, and a voltage difference between the first end of the second charging control module and a first end of the first charging control module according to the conduction states of the first charging control module, the second charging control module, the first master control module, the second master control module, the pre-charging control module and the pre-charging current-limiting module, and determines a fault state of the first charging control module, the second charging control module, the first master control module, the second master control module, the pre-charging control module and the pre-charging 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 vehicle according to an embodiment of the present invention. When an electric automobile high-voltage distribution system is powered on, a specific method for comprehensively detecting faults of a first charging control module, a second charging control module, a first master control module, a second master control module, a pre-charging control module and a pre-charging current-limiting module under the coordination of a high-voltage detection module and a distribution control module is as follows:
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 master control module, the second master control module and the pre-charging control module to be disconnected according to the first control signal;
s520, the high-voltage detection module detects the voltage difference between the first end of the pre-charging control module and the first end of the second master control module and the second end of the first master control module respectively, and judges whether the pre-charging control module and the second master control module have adhesion faults or not according to the voltage difference between the first end of the pre-charging control module and the first end of the second master control module and the second end of the first master control module respectively.
S530, when the pre-charging control module and the second master control module are not in adhesion fault, the high-voltage detection module sends a second control signal to the power distribution control module, and the power distribution control module controls the pre-charging control module to be conducted according to the second control signal;
s540, the high voltage detection module detects the voltage difference between the first end of the pre-charging control module and the first end of the second master control module and the second end of the first master control module respectively, and judges whether the pre-charging control module and the pre-charging current-limiting module break or not according to the voltage difference between the first end of the pre-charging control module and the first end of the second master control module and the second end of the first master control module respectively.
And S550, when the pre-charging control module and the pre-charging current-limiting module are not in open circuit fault, the high-voltage detection module further judges whether the first master control module is in adhesion fault according to the voltage change of the first end of the pre-charging control module and the second end of the first master control module.
S560, when the first master control module has no adhesion fault, the high-voltage detection module sends a third control signal to the power distribution control module, the power distribution control module controls the first master control module to be connected according to the third control signal, and the pre-charging control module is disconnected;
s570, the high-voltage detection module detects the voltage difference between the first end of the second master control module and the second end of the first master control module, and judges whether the second master control module has adhesion faults or not according to the voltage difference between the first end of the second master control module and the second end of the first master control module.
S580, when the second master control module is not in 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 master control module to be conducted according to the fourth control signal;
s590, the high voltage detection module detects a voltage difference between a first end of the second charging control module and a second end of the first master control module, and judges whether the second charging control module has an adhesion fault according to the voltage difference between the first end of the second charging control module and the second end of the first master control module.
S600, the high-voltage detection module sends a fifth control signal to the power distribution control module when the second charging control module is not in adhesion fault, 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 an adhesion fault 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 provided by the embodiment of the invention. As shown in fig. 6, the electric vehicle includes an electric vehicle high-voltage power distribution system 001, two front drivers 002, and two rear drivers 003 in any one of the above embodiments; a 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; the electric vehicle high-voltage power distribution system 001 is used for supplying power to the front driver 002 and the rear driver 003.
Specifically, the external driving device includes two front drivers 002 and two rear drivers 003, that is, the negative terminals of the two front drivers 002 and the negative terminals of the two rear drivers 003 are both connected to the first end of the first total control module 130 in the electric vehicle high-voltage distribution system 001, and the positive terminals of the two front drivers 002 and the positive terminals of the two rear drivers 003 are both connected to the first end of the second total control module 140 in the electric vehicle high-voltage distribution system 001. Therefore, when the first master control module 130 and the second master control module 140 are both in a conducting state, the high-voltage battery 400 in the high-voltage power distribution system 001 of the electric vehicle forms a conducting loop with the two front drivers 002 and the two rear drivers 003, so that the high-voltage battery 400 supplies power to the two front drivers 002 and the two rear drivers 003. In addition, the electric vehicle includes the electric vehicle high-voltage power distribution system 001 provided in any embodiment of the present invention, and therefore has the beneficial effects of the electric vehicle high-voltage power distribution system 001 provided in the embodiment of the present invention, and details are not repeated herein.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (13)

1. An electric vehicle high voltage power distribution system, comprising: the device 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.
2. The high-voltage power distribution system of the electric automobile according to claim 1, wherein the power distribution module comprises a first charging control module, a second charging control module, a first general control module, a second general control module, a pre-charging control module and a pre-charging current limiting module;
the second end of the first charging control module is connected with the negative end of an external driving device and the first end of the first master control module, the second end of the first master 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 master control module and the second end of the pre-charging control module, the first end of the second master control module is connected with the second end of the second charging control module, the first end of the pre-charging current-limiting module and the positive end of the external driving device, and the second end of the pre-charging current-limiting module is connected with the first end of the pre-charging control module; wherein the external drive means comprises two front drives and two rear drives; the high-voltage detection module is connected with the second end of the pre-charging control module, the first end of the second master 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 master 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 master control module, the second master 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 master control module, the second master 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-charging control module, a second end of the pre-charging control module, a first end of the second general control module or a first end of the second charging control module and a second end of the first general control module and a voltage difference between a first end of the second charging control module and a first end of the first charging control module according to the conduction states of the first charging control module, the second charging control module, the first general control module, the second general control module and the pre-charging current-limiting module, and determining a fault state of the first charging control module, the second charging control module, the first general control module, the second general control module, the pre-charging control module and the pre-charging current-limiting module according to the voltage differences.
3. The high-voltage distribution system of the electric vehicle as claimed in claim 2, wherein the distribution control module is configured to receive a first control signal from the high-voltage detection module, and control the first charging control module, the second charging control module, the first general control module, the second general control module, and the pre-charging control module to be turned off 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-charging control module and the first end of the second master control module and the second end of the first master control module respectively, and judging whether the pre-charging control module and the second master control module have adhesion faults or not according to the voltage difference between the first end of the pre-charging control module and the first end of the second master control module and the second end of the first master control module respectively.
4. The high-voltage distribution system of the electric vehicle as claimed in claim 3, wherein the high-voltage detection module is configured to send a second control signal to the distribution control module when neither the pre-charge control module nor the second general control module has an adhesion fault, and the distribution control module is configured to control the pre-charge control module to be turned on according to the second control signal;
the high-voltage detection module is used for detecting voltage differences between a first end of the pre-charging control module and a first end of the second master control module and a second end of the first master control module respectively, and judging whether the pre-charging control module and the pre-charging current-limiting module break or not according to the voltage differences between the first end of the pre-charging control module and the first end of the second master control module and the second end of the first master control module respectively.
5. The high-voltage distribution system of the electric vehicle as claimed in claim 4, wherein when the pre-charge control module and the pre-charge current-limiting module are not in open circuit fault, the high-voltage detection module is further configured to determine whether the first master control module is in adhesion fault according to a voltage change between the first end of the pre-charge control module and the second end of the first master control module.
6. The high-voltage power distribution system of the electric automobile as claimed in claim 5, wherein the high-voltage detection module is configured to send a third control signal to the power distribution control module when the first general control module has no adhesion fault, the power distribution control module is configured to control the first general control module to be turned on according to the third control signal, and the pre-charging control module is turned off;
the high-voltage detection module is used for detecting the voltage difference between the first end of the second master control module and the second end of the first master control module, and judging whether the second master control module has adhesion faults or not according to the voltage difference between the first end of the second master control module and the second end of the first master control module.
7. The high-voltage distribution system of the electric automobile according to claim 6, wherein the high-voltage detection module is configured to send a fourth control signal to the distribution control module when the second general control module has no adhesion fault, and the distribution control module is configured to control the second general 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 master control module, and judging whether the second charging control module has an adhesion fault or not according to the voltage difference between the first end of the second charging control module and the second end of the first master control module.
8. The high-voltage distribution system of the electric vehicle as claimed in claim 7, 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 conduct according to the fifth control signal;
the high-voltage detection module is used for detecting a 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 an adhesion fault 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.
9. The high voltage power distribution system of claim 2, wherein the first charging control module comprises a first switch, the second charging control module comprises a second switch, the first bus control module comprises a third switch, the second bus control module comprises a fourth switch, the pre-charging control module comprises a fifth switch, and the pre-charging current limiting module comprises a resistor.
10. The high voltage electric power distribution system of claim 9, wherein the first switch, the second switch, the third switch, the fourth switch, and the fifth switch are relays.
11. An electric vehicle high voltage power distribution system detection method, which is executed by the electric vehicle high voltage power distribution system of any one of claims 1 to 10, and is characterized by comprising the following steps:
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 connection loop and confirms the fault state of the power distribution module according to the voltage of the power distribution module connection loop.
12. The method for detecting the high-voltage distribution system of the electric automobile according to claim 11, wherein the distribution module comprises a first charging control module, a second charging control module, a first general control module, a second general control module, a pre-charging control module and a pre-charging current limiting module;
the second end of the first charging control module is connected with the negative end of an external driving device and the first end of the first master control module, the second end of the first master 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 master control module and the second end of the pre-charging control module, the first end of the second master control module is connected with the second end of the second charging control module, the first end of the pre-charging current-limiting module and the positive end of the external driving device, and the second end of the pre-charging current-limiting module is connected with the first end of the pre-charging control module; wherein the external drive means comprises two front drives and two rear drives;
the high-voltage detection module is connected with the second end of the pre-charging control module, the first end of the second master 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 master 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 master control module, the second master control module and the pre-charging control module;
the power distribution control module receives a 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 master control module, the second master 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-charging control module, a second end of the pre-charging control module, a first end of the second general control module or a first end of the second charging control module and a second end of the first general control module and a voltage difference between a first end of the second charging control module and a first end of the first charging control module according to the conduction states of the first charging control module, the second charging control module, the first general control module, the second general control module and the pre-charging current limiting module, and determines a fault state of the first charging control module, the second charging control module, the first general control module, the second general control module, the pre-charging control module and the pre-charging current limiting module according to the voltage differences.
13. An electric vehicle comprising an electric vehicle high voltage power distribution system of any of claims 1-10, two front drives and two rear drives;
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 for the front driver and the rear driver.
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