CN217672173U - Whole car insulation circuit of electric automobile, system and electric automobile - Google Patents
Whole car insulation circuit of electric automobile, system and electric automobile Download PDFInfo
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- CN217672173U CN217672173U CN202221707532.5U CN202221707532U CN217672173U CN 217672173 U CN217672173 U CN 217672173U CN 202221707532 U CN202221707532 U CN 202221707532U CN 217672173 U CN217672173 U CN 217672173U
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- 238000009413 insulation Methods 0.000 title claims abstract description 105
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
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- 230000005611 electricity Effects 0.000 claims description 4
- 238000004378 air conditioning Methods 0.000 description 4
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- 238000005485 electric heating Methods 0.000 description 2
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Abstract
The utility model provides a whole car of electric automobile insulating circuit, system and electric automobile belongs to electric automobile technical field, and the first end of first relay is used for being connected with anodal generating line, and the second end of first relay is connected with the first end of third relay and the first end of fourth relay respectively; the second end of the third relay is connected with the first positive end of the high-voltage heating resistance module, the second end of the fourth relay is connected with the second positive end of the high-voltage heating resistance module, and the second end of the first relay is connected with the positive end of the compressor; the first end of the second relay is used for being connected with the negative bus, and the second end of the second relay is respectively connected with the negative end of the high-voltage heating resistance module and the negative end of the compressor; the utility model discloses a quick trouble self-checking in electric automobile annex return circuit has prevented that electric automobile from going the time high-pressure annex return circuit and taking place insulation fault.
Description
Technical Field
The utility model relates to an electric automobile technical field, in particular to whole car insulating circuit of electric automobile, system and electric automobile.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The current situation of high-voltage architecture of electric automobiles in the industry at present: the circuits of the whole vehicle high-voltage system are connected in parallel, the high-voltage modules are subjected to common negative treatment, the Battery Management System (BMS) is used for carrying out insulation monitoring on the whole vehicle high-voltage system, when the whole vehicle high-voltage circuit has insulation faults, specific insulation fault points cannot be distinguished, and when the accessory circuits (the compressor (AC) and the high-voltage heating resistor module (PTC)) have insulation faults, the accessory circuits cannot be isolated because the whole vehicle circuits are common positive and common negative, so that the safety and throw problems of the whole vehicle are caused, and further the potential safety hazard is caused.
The inventor finds that patent number CN114103646a discloses an insulation fault detection method, device, whole vehicle high-voltage loop and electric vehicle, which judges whether the compressor has a fault or not through the on-off of a first relay and a second relay; the technology can only realize the identification of the insulation fault of a single part of a compressor, an accessory circuit of the electric automobile also comprises a high-voltage electric heating resistor module, and the insulation fault of the whole automobile can be caused by the fault of the high-voltage electric heating resistor module; and if the compressor and the high-voltage heating resistance module are respectively provided with a detection circuit for independent testing, the detection efficiency is lower, the vehicle self-checking time is longer, and the use experience is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the not enough of prior art, the utility model provides a whole car of electric automobile insulating circuit, system and electric automobile has realized the quick trouble self-checking in electric automobile annex return circuit, and high-pressure annex (compressor and high-tension electricity heating resistance module) return circuit takes place insulation failure when preventing that electric automobile from traveling, has guaranteed that the vehicle normally travels, avoids causing the safe problem of traveling that whole car can't travel and bring because high-pressure annex appears insulating problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses the first aspect provides a whole car insulation circuit of electric automobile.
The utility model provides a whole car insulating circuit of electric automobile, includes: a first relay, a second relay, a third relay and a fourth relay;
the first end of the first relay is used for being connected with the positive bus, and the second end of the first relay is respectively connected with the first end of the third relay and the first end of the fourth relay;
the second end of the third relay is connected with the first positive end of the high-voltage heating resistance module, the second end of the fourth relay is connected with the second positive end of the high-voltage heating resistance module, and the second end of the first relay is connected with the positive end of the compressor;
the first end of the second relay is used for being connected with the negative bus, and the second end of the second relay is respectively connected with the negative end of the high-voltage heating resistance module and the negative end of the compressor;
first enabling ends of the first relay, the second relay, the third relay and the fourth relay are respectively used for being connected with a control port of the vehicle controller, and second enabling ends of the first relay, the second relay, the third relay and the fourth relay are all used for being connected with the whole vehicle.
As an optional implementation manner, a second end of the second relay is connected to a first end of the first fuse, and a second end of the first fuse is connected to a negative end of the high-voltage heating resistor module and a negative end of the compressor, respectively.
As an optional implementation manner, the second end of the first relay is connected to the first end of the third relay through the second fuse, and the second end of the first relay is connected to the first end of the fourth relay through the third fuse.
As an optional implementation manner, the second terminal of the first relay is connected to the positive terminal of the compressor through a fourth fuse.
As an optional implementation manner, the compressor further includes a fifth relay, a first end of the fourth fuse is connected to a second end of the first relay, a second end of the fourth fuse is connected to a first end of the fifth relay, and a second end of the fifth relay is connected to a positive end of the compressor;
and a first enabling end of the fifth relay is respectively used for being connected with a control port of the vehicle controller, and a second enabling end of the fifth relay is used for being connected with the vehicle ground.
As an optional implementation manner, the compressor further includes a sixth relay, a first end of the first fuse is connected to a second end of the second relay, a second end of the first fuse is connected to a first end of the sixth relay, and a second end of the sixth relay is connected to a negative end of the compressor;
and a first enabling end of the sixth relay is respectively used for being connected with a control port of the vehicle controller, and a second enabling end of the sixth relay is used for being connected with the vehicle ground.
The utility model discloses the second aspect provides a whole car insulation circuit system of electric automobile.
The utility model provides an electric automobile whole car insulation circuit system, includes: the system comprises a vehicle control unit, a first relay, a second relay, a third relay and a fourth relay;
the first end of the first relay is connected with the positive bus, and the second end of the first relay is respectively connected with the first end of the third relay and the first end of the fourth relay;
the second end of the third relay is connected with the first positive end of the high-voltage heating resistance module, the second end of the fourth relay is connected with the second positive end of the high-voltage heating resistance module, and the second end of the first relay is connected with the positive end of the compressor;
the first end of the second relay is used for being connected with the negative bus, and the second end of the second relay is respectively connected with the negative end of the high-voltage heating resistance module and the negative end of the compressor;
first enabling ends of the first relay, the second relay, the third relay and the fourth relay are respectively connected with a control port of the vehicle control unit, and second enabling ends of the first relay, the second relay, the third relay and the fourth relay are all connected with the whole vehicle.
As an optional implementation manner, a second end of the second relay is connected to a first end of the first fuse, and a second end of the first fuse is connected to a negative end of the high-voltage heating resistor module and a negative end of the compressor, respectively.
As an optional implementation manner, the second end of the first relay is connected to the first end of the third relay through the second fuse, and the second end of the first relay is connected to the first end of the fourth relay through the third fuse.
As an optional implementation manner, the second end of the first relay is connected to the positive terminal of the compressor through a fourth fuse;
as an optional implementation manner, the compressor further comprises a fifth relay, wherein the first end of the fourth fuse is connected with the second end of the first relay, the second end of the fourth fuse is connected with the first end of the fifth relay, and the second end of the fifth relay is connected with the positive end of the compressor;
and a first enabling end of the fifth relay is respectively connected with a control port of the vehicle controller, and a second enabling end of the fifth relay is connected with the vehicle ground.
As an optional implementation manner, the compressor further includes a sixth relay, a first end of the first fuse is connected to a second end of the second relay, a second end of the first fuse is connected to a first end of the sixth relay, and a second end of the sixth relay is connected to a negative end of the compressor;
and a first enabling end of the sixth relay is respectively used for being connected with a control port of the vehicle controller, and a second enabling end of the sixth relay is used for being connected with the vehicle ground.
The utility model discloses the third aspect provides an electric automobile, include: the utility model discloses first aspect the whole car of electric automobile insulating circuit.
The utility model discloses a fourth aspect provides an electric automobile, include: including the utility model discloses the second aspect whole car insulation circuit system of electric automobile.
Compared with the prior art, the beneficial effects of the utility model are that:
1. whole car of electric automobile insulating circuit, system and electric automobile, realized the quick trouble self-checking in electric automobile annex return circuit, high-pressure annex (compressor and high-tension electricity heating resistance module) return circuit takes place insulation fault when preventing that electric automobile from traveling, has guaranteed that the vehicle normally travels, avoids causing the safe problem of traveling that can't travel and bring of whole car because high-pressure annex appears insulating problem.
2. Whole car insulating circuit of electric automobile, system and electric automobile, break-make cooperation through first relay and second relay, positive terminal trouble or the negative pole end trouble that can effectual discernment high-pressure annex return circuit can more accurate realization insulating fault discernment.
3. Whole car insulating circuit of electric automobile, system and electric automobile, through the cooperation of third relay, fourth relay, fifth relay and sixth relay, the insulating fault discernment of carrying out compressor and high-tension electricity heating resistance module that can be quick only breaks off the module of trouble, the travelling comfort of assurance vehicle operation that can the at utmost.
4. Whole car insulating circuit of electric automobile, system and electric automobile, through first fuse, second fuse, third fuse and fourth fuse, can effectually carry out the safety protection in each relay return circuit.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic connection diagram of an insulation circuit of an electric vehicle provided in embodiment 1 of the present invention.
Fig. 2 is a schematic connection diagram of an insulating circuit of a whole electric vehicle provided by the embodiment of the utility model 2.
Description of reference numerals:
1. the high-voltage heating system comprises a first relay, 2, a second relay, 3, a third relay, 4, a fourth relay, 5, a fifth relay, 6, a sixth relay, 7, a first fuse, 8, a second fuse, 9, a third fuse, 10, a fourth fuse, 11, an ignition control module, 12, a battery management module, 13, an air conditioner assembly, 14, a vehicle control unit, 15, a compressor, 16, a CAN bus and 17, and a high-voltage heating resistor module.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the case of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.
Example 1:
as shown in fig. 1, embodiment 1 of the present invention provides an entire electric vehicle insulation circuit, including: a first relay (i.e., relay 1), a second relay (i.e., relay 2), a third relay (i.e., relay 3), and a fourth relay (i.e., relay 4);
the first end of the first relay is used for being connected with the positive bus, and the second end of the first relay is respectively connected with the first end of the third relay and the first end of the fourth relay;
the second end of the third relay is connected with the first positive end of the high-voltage heating resistance module, the second end of the fourth relay is connected with the second positive end of the high-voltage heating resistance module, and the second end of the first relay is connected with the positive end of the compressor;
the first end of the second relay is used for being connected with the negative bus, and the second end of the second relay is respectively connected with the negative end of the high-voltage heating resistance module and the negative end of the compressor;
first enabling ends of the first relay, the second relay, the third relay and the fourth relay are respectively used for being connected with a control port of the vehicle controller, and second enabling ends of the first relay, the second relay, the third relay and the fourth relay are all used for being connected with the whole vehicle.
In this embodiment, the second terminal of the second relay is connected to the first terminal of the first fuse (i.e., fuse 1), and the second terminals of the first fuse are connected to the negative terminal of the high-voltage heating resistor module (i.e., PTC) and the negative terminal of the compressor (i.e., AC), respectively.
In this embodiment, the second end of the first relay is connected to the first end of the third relay through the second fuse (i.e., fuse 2), and the second end of the first relay is connected to the first end of the fourth relay through the third fuse (i.e., fuse 3).
In this embodiment, the second terminal of the first relay is connected to the positive terminal of the compressor through the fourth fuse (i.e., fuse 4).
Example 2:
as shown in fig. 2, embodiment 2 of the present invention provides an entire electric vehicle insulation circuit, including: a first relay (i.e., relay 1), a second relay (i.e., relay 2), a third relay (i.e., relay 3), a fourth relay (i.e., relay 4), a fifth relay, and a sixth relay;
the first end of the first relay is used for being connected with the positive bus, and the second end of the first relay is respectively connected with the first end of the third relay and the first end of the fourth relay;
the second end of the third relay is connected with the first positive end of the high-voltage heating resistance module, the second end of the fourth relay is connected with the second positive end of the high-voltage heating resistance module, and the second end of the first relay is connected with the positive end of the compressor;
the first end of the second relay is used for being connected with the negative bus, and the second end of the second relay is respectively connected with the negative end of the high-voltage heating resistance module and the negative end of the compressor;
first enabling ends of the first relay, the second relay, the third relay and the fourth relay are respectively used for being connected with a control port of the vehicle controller, and second enabling ends of the first relay, the second relay, the third relay and the fourth relay are all used for being connected with the whole vehicle.
In this embodiment, the second terminal of the second relay is connected to the first terminal of the first fuse (i.e., fuse 1), and the second terminals of the first fuse are connected to the negative terminal of the high-voltage heating resistor module (i.e., PTC) and the negative terminal of the compressor (i.e., AC), respectively.
In this embodiment, the second end of the first relay is connected to the first end of the third relay through the second fuse (i.e., fuse 2), and the second end of the first relay is connected to the first end of the fourth relay through the third fuse (i.e., fuse 3).
In this embodiment, the second terminal of the first relay is connected to the positive terminal of the compressor through the fourth fuse (i.e., fuse 4).
In this embodiment, the compressor further includes a fifth relay (i.e., the relay 5), a first end of the fourth fuse is connected to a second end of the first relay, a second end of the fourth fuse is connected to a first end of the fifth relay, and a second end of the fifth relay is connected to a positive terminal of the compressor;
and a first enabling end of the fifth relay is respectively used for being connected with a control port of the vehicle controller, and a second enabling end of the fifth relay is used for being connected with the vehicle ground.
In this embodiment, the compressor further includes a sixth relay (i.e., the relay 6), the first end of the first fuse is connected to the second end of the second relay, the second end of the first fuse is connected to the first end of the sixth relay, and the second end of the sixth relay is connected to the negative terminal of the compressor;
and a first enabling end of the sixth relay is respectively used for being connected with a control port of the whole vehicle controller, and a second enabling end of the sixth relay is respectively used for being connected with the whole vehicle.
Example 3:
the embodiment 3 of the utility model provides a whole car insulating circuit of electric automobile, include: the relay comprises a first relay, a second relay, a third relay and a fourth relay;
the first end of the first relay is connected with the positive bus, and the second end of the first relay is respectively connected with the first end of the third relay and the first end of the fourth relay;
the second end of the third relay is connected with the first positive end of the high-voltage heating resistance module, the second end of the fourth relay is connected with the second positive end of the high-voltage heating resistance module, and the second end of the first relay is connected with the positive end of the compressor;
the first end of the second relay is used for being connected with the negative bus, and the second end of the second relay is respectively connected with the negative end of the high-voltage heating resistance module and the negative end of the compressor;
first enabling ends of the first relay, the second relay, the third relay and the fourth relay are respectively connected with a control port of the vehicle control unit, and second enabling ends of the first relay, the second relay, the third relay and the fourth relay are all connected with the whole vehicle.
In this embodiment, the second end of the second relay is connected to the first end of the first fuse, and the second end of the first fuse is connected to the negative terminal of the high-voltage heating resistor module and the negative terminal of the compressor respectively.
In this embodiment, the second end of first relay passes through the second fuse to be connected with the first end of third relay, and the second end of first relay passes through the third fuse to be connected with the first end of fourth relay.
In this embodiment, the second terminal of the first relay is connected to the positive terminal of the compressor through the fourth fuse.
The intelligent control system also comprises an ICM (ignition control module), a BMS (battery management module) and an HVAC (air conditioning assembly), wherein the whole Vehicle Controller (VCU), the ICM (ignition control module), the BMS (battery management module) and the HVAC (air conditioning assembly) are respectively in communication connection with the CAN bus.
Specifically, the working method of the system has the following modes:
(1) And (3) cutting off the compressor and the PTC of the whole vehicle:
when the BMS detects that the whole vehicle has insulation faults, an insulation fault signal is sent, the VCU reads the insulation faults through the CAN bus, the VCU judges the AC or PTC closed state, when the AC and the PTC are disconnected, the VCU sends the insulation faults to the ICM, the ICM receives insulation fault alarm and lights an insulation fault lamp, meanwhile, the VCU forwards an MCU (power electronic unit) and high-voltage accessory high-voltage unloading instruction, the MCU and the high-voltage accessory unload after receiving the closing instruction, and the unloading is finished and an unloading completion state is sent.
(2) Complete vehicle closing or closing high-voltage accessory loop
When the BMS detects that the whole vehicle has insulation faults, an insulation fault signal is sent, the VCU reads the insulation faults through a CAN signal, the VCU judges the closing state of the AC and the PTC, when the AC and the PTC are closed, the VCU controls a first relay (at the moment, a second relay, a third relay and a fourth relay are closed) to be switched off, the BMS continuously detects the insulation faults of the whole vehicle, and if no insulation faults are detected after the continuous preset time, the BMS judges that the high-voltage accessories are in positive (AC and PTC) insulation faults, and the whole vehicle normally runs; if the insulation fault of the whole vehicle is detected after the preset time, the VCU controls the second relay to be disconnected, the BMS continuously detects the insulation fault of the whole vehicle, and if no insulation fault is detected after the preset time, the negative (AC and PTC) insulation fault of the high-voltage accessory is judged, and the whole vehicle normally runs; if the insulation fault of the whole vehicle is detected after the continuous preset time, the insulation fault exists at other high-voltage positions of the whole vehicle, the VCU sends the insulation fault to the ICM, the ICM receives the insulation fault alarm and lights an insulation fault lamp, meanwhile, the VCU forwards an MCU and high-voltage accessory high-voltage unloading instruction, the MCU and the high-voltage accessory unload after receiving a closing instruction, and the unloading is finished and an unloading completion state is sent out.
(3) Complete vehicle closure or shutdown AC
When the BMS detects that the whole vehicle has insulation faults, an insulation fault signal is sent, the VCU reads the insulation faults through the CAN signal, the VCU judges the closing state of the AC and the PTC, when the AC and the PTC are closed, the VCU controls the first relay to be opened (at the moment, the second relay, the third relay and the fourth relay are closed), the BMS continuously detects the insulation faults of the whole vehicle, and if no insulation faults are detected after the continuous preset time, the positive (AC and PTC) insulation faults of the high-voltage accessory are judged;
the first relay is closed again, the VCU controls the third relay and the fourth relay to be simultaneously opened (the second relay is closed), the BMS continuously detects the insulation fault of the whole vehicle, and if no insulation fault is detected after the BMS continuously detects the preset time, the AC positive insulation fault is judged, and the whole vehicle normally runs; otherwise, the PTC positive insulation fault is detected, the first relay is disconnected again, and the whole vehicle runs normally.
Example 4:
the embodiment 4 of the utility model provides a whole car insulation circuit system of electric automobile, include: the relay comprises a first relay, a second relay, a third relay, a fourth relay, a fifth relay and a sixth relay;
the first end of the first relay is used for being connected with the positive bus, and the second end of the first relay is respectively connected with the first end of the third relay and the first end of the fourth relay;
the second end of the third relay is connected with the first positive end of the high-voltage heating resistance module, the second end of the fourth relay is connected with the second positive end of the high-voltage heating resistance module, and the second end of the first relay is connected with the positive end of the compressor;
the first end of the second relay is used for being connected with the negative bus, and the second end of the second relay is respectively connected with the negative end of the high-voltage heating resistance module and the negative end of the compressor;
first enabling ends of the first relay, the second relay, the third relay and the fourth relay are respectively used for being connected with a control port of the vehicle controller, and second enabling ends of the first relay, the second relay, the third relay and the fourth relay are all used for being connected with the whole vehicle.
In this embodiment, the second end of the second relay is connected with the first end of the first fuse, and the second end of the first fuse is connected with the negative electrode end of the high-voltage heating resistance module and the negative electrode end of the compressor respectively.
In this embodiment, the second end of first relay passes through the second fuse to be connected with the first end of third relay, and the second end of first relay passes through the third fuse to be connected with the first end of fourth relay.
In this embodiment, the second terminal of the first relay is connected to the positive terminal of the compressor through the fourth fuse.
In this embodiment, the compressor further comprises a fifth relay, wherein the first end of the fourth fuse is connected with the second end of the first relay, the second end of the fourth fuse is connected with the first end of the fifth relay, and the second end of the fifth relay is connected with the positive end of the compressor;
and a first enabling end of the fifth relay is respectively used for being connected with a control port of the vehicle controller, and a second enabling end of the fifth relay is used for being connected with the vehicle ground.
In this embodiment, the compressor further includes a sixth relay (i.e., the relay 6), the first end of the first fuse is connected to the second end of the second relay, the second end of the first fuse is connected to the first end of the sixth relay, and the second end of the sixth relay is connected to the negative terminal of the compressor;
and a first enabling end of the sixth relay is respectively used for being connected with a control port of the vehicle controller, and a second enabling end of the sixth relay is used for being connected with the vehicle ground.
The vehicle control system further comprises an ICM (ignition control module), a BMS (battery management module) and an HVAC (air conditioning assembly), wherein the whole Vehicle Controller (VCU), the ICM (ignition control module), the BMS (battery management module) and the HVAC (air conditioning assembly) are respectively in communication connection with the CAN bus.
Specifically, the working method of the system has the following modes:
(1) When the BMS detects that the whole vehicle has insulation faults, an insulation fault signal is sent, the VCU reads the insulation faults through the CAN bus, the VCU judges the closing state of the AC and the PTC, when the AC and the PTC are disconnected, the VCU sends the insulation faults to the ICM, the ICM receives insulation fault alarm and lights an insulation fault lamp, meanwhile, the VCU forwards an MCU (power electronic unit) and high-voltage accessory high-voltage unloading instruction, the MCU and the high-voltage accessory unload after receiving the closing instruction, and the unloading is finished and sends an unloading finishing state.
(2) When the BMS detects that the whole vehicle has insulation faults, an insulation fault signal is sent, the VCU reads the insulation faults through a CAN signal, the VCU judges the closing state of the AC and the PTC, when the AC and the PTC are closed, the VCU controls the first relay to be disconnected (at the moment, the second relay, the third relay, the fourth relay, the fifth relay and the sixth relay are all closed), the BMS continuously detects the insulation faults of the whole vehicle, and if no insulation faults are detected after the BMS continuously detects the preset time, the insulation faults of high-voltage accessories (the AC and the PTC) are judged, and the whole vehicle normally runs;
if the insulation fault of the whole vehicle is detected after the preset time, the VCU controls the second relay to be disconnected, the BMS continuously detects the insulation fault of the whole vehicle, and if no insulation fault is detected after the preset time, the negative (AC and PTC) insulation fault of the high-voltage accessory is judged, and the whole vehicle normally runs; if the insulation fault of the whole vehicle is detected after the continuous preset time, the insulation fault exists at other high-voltage positions of the whole vehicle, the VCU sends the insulation fault to the ICM, the ICM receives the insulation fault alarm and lights an insulation fault lamp, meanwhile, the VCU forwards an MCU and high-voltage accessory high-voltage unloading instruction, the MCU and the high-voltage accessory unload after receiving a closing instruction, and the unloading is finished and an unloading completion state is sent out.
(3) Complete vehicle closure or shutdown AC
When the BMS detects that the whole vehicle has insulation faults, an insulation fault signal is sent, the VCU reads the insulation faults through a CAN signal, the VCU judges the closing state of the AC and the PTC, when the AC and the PTC are closed, the VCU controls the first relay to be opened (at the moment, the second relay, the third relay, the fourth relay, the fifth relay and the sixth relay are all closed), the BMS continuously detects the insulation faults of the whole vehicle, and if no insulation faults are detected after the BMS continuously detects the preset time, the positive (AC and PTC) insulation faults of the high-voltage accessory are judged; the first relay is closed again, the VCU controls the third relay and the fourth relay to be simultaneously opened, the BMS continuously detects the insulation fault of the whole vehicle, and if no insulation fault is detected after the BMS continuously detects the preset time, the AC positive insulation fault is judged, and the whole vehicle normally runs; or the first relay is closed again, the VCU controls the fifth relay to be switched off, the BMS continuously detects the insulation fault of the whole vehicle, and after the preset time, if no insulation fault is detected, the PTC positive insulation fault is judged, and the whole vehicle normally runs;
or when the BMS detects that the whole vehicle has insulation faults, an insulation fault signal is sent, the VCU reads the insulation faults through the CAN signal, the VCU judges the closing state of the AC and the PTC, when the AC and the PTC are closed, the VCU controls the second relay to be opened (at the moment, the first relay, the third relay, the fourth relay, the fifth relay and the sixth relay are all closed), the BMS continuously detects the insulation faults of the whole vehicle, and if no insulation faults are detected after the BMS continuously detects the preset time, the negative (AC and PTC) insulation faults of the high-voltage accessories are judged; and closing the second relay again, controlling the sixth relay to be disconnected by the VCU, continuously detecting the insulation fault of the whole vehicle by the BMS, judging the PTC negative insulation fault if no insulation fault is detected after the preset time is continuously carried out, and normally driving the whole vehicle.
Example 5:
the embodiment 5 of the utility model provides an electric automobile, include: the utility model discloses embodiment 1 or embodiment 2 whole car insulation circuit of electric automobile.
Example 6:
the embodiment 6 of the utility model provides an electric automobile, include: including the utility model discloses embodiment 3 or embodiment 4 whole car insulation circuit system of electric automobile.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a whole car insulating circuit of electric automobile which characterized in that:
the method comprises the following steps: the relay comprises a first relay, a second relay, a third relay and a fourth relay;
the first end of the first relay is used for being connected with the positive bus, and the second end of the first relay is respectively connected with the first end of the third relay and the first end of the fourth relay;
the second end of the third relay is connected with the first positive end of the high-voltage heating resistance module, the second end of the fourth relay is connected with the second positive end of the high-voltage heating resistance module, and the second end of the first relay is connected with the positive end of the compressor;
the first end of the second relay is used for being connected with the negative bus, and the second end of the second relay is respectively connected with the negative end of the high-voltage heating resistance module and the negative end of the compressor;
first enabling ends of the first relay, the second relay, the third relay and the fourth relay are respectively used for being connected with a control port of the vehicle controller, and second enabling ends of the first relay, the second relay, the third relay and the fourth relay are all used for being connected with the whole vehicle.
2. The whole electric vehicle insulation circuit of claim 1, characterized in that:
the second end of second relay is connected with the first end of first fuse, and the second end of first fuse is connected with the negative pole end of high tension electricity heating resistance module and the negative pole end of compressor respectively.
3. The whole electric vehicle insulation circuit of claim 1, characterized in that:
the second end of first relay passes through the second fuse to be connected with the first end of third relay, and the second end of first relay passes through the third fuse to be connected with the first end of fourth relay.
4. The whole electric vehicle insulation circuit of claim 1, characterized in that:
the second end of the first relay is connected with the positive end of the compressor through a fourth fuse.
5. The whole electric vehicle insulation circuit of claim 1, characterized in that:
the first end of the fourth fuse is connected with the second end of the first relay, the second end of the fourth fuse is connected with the first end of the fifth relay, and the second end of the fifth relay is connected with the positive end of the compressor;
and a first enabling end of the fifth relay is respectively used for being connected with a control port of the vehicle controller, and a second enabling end of the fifth relay is used for being connected with the vehicle ground.
6. The whole electric vehicle insulation circuit of claim 1, characterized in that:
the first end of the first fuse is connected with the second end of the second relay, the second end of the first fuse is connected with the first end of the sixth relay, and the second end of the sixth relay is connected with the negative pole end of the compressor;
and a first enabling end of the sixth relay is respectively used for being connected with a control port of the vehicle controller, and a second enabling end of the sixth relay is used for being connected with the vehicle ground.
7. The utility model provides a whole car insulation circuit system of electric automobile which characterized in that:
the method comprises the following steps: the system comprises a vehicle control unit, a first relay, a second relay, a third relay and a fourth relay;
the first end of the first relay is connected with the positive bus, and the second end of the first relay is respectively connected with the first end of the third relay and the first end of the fourth relay;
the second end of the third relay is connected with the first positive end of the high-voltage heating resistance module, the second end of the fourth relay is connected with the second positive end of the high-voltage heating resistance module, and the second end of the first relay is connected with the positive end of the compressor;
the first end of the second relay is used for being connected with the negative bus, and the second end of the second relay is respectively connected with the negative end of the high-voltage heating resistance module and the negative end of the compressor;
first enabling ends of the first relay, the second relay, the third relay and the fourth relay are respectively connected with a control port of the vehicle controller, and second enabling ends of the first relay, the second relay, the third relay and the fourth relay are all connected with the vehicle ground.
8. The whole electric vehicle insulation circuit system of claim 7, characterized in that:
the second end of the second relay is connected with the first end of the first fuse, and the second end of the first fuse is respectively connected with the negative end of the high-voltage heating resistance module and the negative end of the compressor;
or,
the second end of the first relay is connected with the first end of the third relay through the second fuse, and the second end of the first relay is connected with the first end of the fourth relay through the third fuse;
or,
the second end of the first relay is connected with the positive end of the compressor through a fourth fuse.
9. The whole electric vehicle insulation circuit system of claim 7, characterized in that:
the first end of the fourth fuse is connected with the second end of the first relay, the second end of the fourth fuse is connected with the first end of the fifth relay, and the second end of the fifth relay is connected with the positive end of the compressor;
a first enabling end of a fifth relay is respectively connected with a control port of the vehicle controller, and second enabling ends of the fifth relay are respectively connected with a vehicle ground;
or,
the first end of the first fuse is connected with the second end of the second relay, the second end of the first fuse is connected with the first end of the sixth relay, and the second end of the sixth relay is connected with the negative pole end of the compressor;
and a first enabling end of the sixth relay is respectively used for being connected with a control port of the vehicle controller, and a second enabling end of the sixth relay is used for being connected with the vehicle ground.
10. An electric vehicle, characterized in that:
the method comprises the following steps: the whole electric vehicle insulation circuit of any one of claims 1 to 6;
or,
the method comprises the following steps: the electric vehicle complete insulation circuit system of any one of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221707532.5U CN217672173U (en) | 2022-07-01 | 2022-07-01 | Whole car insulation circuit of electric automobile, system and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221707532.5U CN217672173U (en) | 2022-07-01 | 2022-07-01 | Whole car insulation circuit of electric automobile, system and electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217672173U true CN217672173U (en) | 2022-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221707532.5U Active CN217672173U (en) | 2022-07-01 | 2022-07-01 | Whole car insulation circuit of electric automobile, system and electric automobile |
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| Country | Link |
|---|---|
| CN (1) | CN217672173U (en) |
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2022
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