CN114030358A - High-voltage interlocking control system of pure electric vehicle - Google Patents
High-voltage interlocking control system of pure electric vehicle Download PDFInfo
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- CN114030358A CN114030358A CN202111459986.5A CN202111459986A CN114030358A CN 114030358 A CN114030358 A CN 114030358A CN 202111459986 A CN202111459986 A CN 202111459986A CN 114030358 A CN114030358 A CN 114030358A
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- interlocking
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Abstract
The invention discloses a high-voltage interlocking control system of a pure electric vehicle, which comprises a plurality of high-voltage devices and control units thereof, wherein the control unit of each high-voltage device correspondingly detects the interlocking connection fault through a detection circuit and judges whether the interlocking fault exists or not according to the detected state, the output end of each high-voltage device is connected to a VCU, and the VCU sends out a warning alarm according to a fault signal transmitted by the control unit of each high-voltage device. The invention has the advantages that: the control unit of each high-voltage device is adopted to detect respective interlocking state data, detect and upload the interlocking state data to the VCU, and the VCU judges, alarms and reminds in a unified manner, so that the cost of the whole vehicle can be saved, the increase of wiring is reduced, the space of the whole vehicle is saved, and the position of a fault can be quickly determined by the VCU.
Description
Technical Field
The invention relates to an electric vehicle interlocking detection circuit, in particular to a pure electric vehicle high-voltage interlocking control system.
Background
The high-voltage interlocking is an important function in the pure electric vehicle and is used for realizing connection detection and alarm among all high-voltage components, so that safe and reliable operation of the electric vehicle is ensured, alarm is given in time after interlocking faults are detected, and the safety of the whole vehicle can be ensured to a great extent. In the prior art, an interlock detection method generally detects voltage, an interlock state is judged according to the voltage, in order to determine a fault position, some circuit devices are required to be additionally arranged to detect the position, so that rapid positioning is achieved, the application causes the increase of circuits on a vehicle, the cost is increased, the complexity is increased in design, a control device is added, and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-voltage interlocking control system of a pure electric vehicle, which is used for detecting respective interlocking connection states by using respective high-voltage devices.
In order to achieve the purpose, the invention adopts the technical scheme that: a high-voltage interlocking control system of a pure electric vehicle comprises a plurality of high-voltage devices and control units thereof, wherein the control unit of each high-voltage device correspondingly detects the interlocking connection fault through a detection circuit and judges whether the interlocking fault exists or not according to the detected state, the output end of each high-voltage device is connected to a VCU, and the VCU sends out a warning alarm according to a fault signal transmitted by the control unit of each high-voltage device.
And the control unit of each high-voltage device is transmitted to the VCU through the whole vehicle CAN network, read by the VCU and perform uniform whole vehicle fault judgment.
And the VCU receives the detection result signals of the control units of the high-voltage devices, identifies the high-voltage devices, positions the high-voltage devices with the interlocking faults and sends out alarm reminding signals.
The control unit of the high-voltage device adopts a PWM square wave detection loop or a direct current source detection loop to realize the detection of the high-voltage interlocking fault state.
The control unit of the high-voltage device judges the interlocking fault state by collecting the voltages at two ends of the interlocking connector in the PWM square wave detection circuit or the direct current source detection circuit.
A detection circuit for detecting an interlock fault is integrated on a PCB circuit board, and a connector for two high-voltage devices for interlock connection is integrated on the PCB circuit board.
And the VCU adopts the identification marks in the communication protocol to identify each high-voltage device corresponding to the received detection result, so as to locate the interlocking fault position.
The invention has the advantages that: the control unit of each high-voltage device is adopted to detect respective interlocking state data, detect and upload the interlocking state data to the VCU, and the VCU judges, alarms and reminds in a unified manner, so that the cost of the whole vehicle can be saved, the increase of wiring is reduced, the space of the whole vehicle is saved, and the position of a fault can be quickly determined by the VCU.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic view of the interlocking principle of the present invention;
FIG. 2 is a schematic diagram of PWM square wave and DC source detection in interlock detection according to the present invention;
FIG. 3 is a schematic view of a PCB board of the present invention;
FIG. 4 is a schematic diagram of the uploading of fault data according to the present invention;
fig. 5 is a schematic diagram of the transmission of each high voltage device of the present invention through CAN.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
Aiming at the condition that a circuit, a controller and the like are required to be added during acquisition and identification in the prior art, the control unit in each high-voltage device in the prior art is adopted to detect and judge each high-voltage device and upload the detected and judged high-voltage devices to vcu for unified comprehensive judgment, so that the positioning and judgment of the interlocking fault are realized.
As shown in fig. 1, the Interlock refers to a detection function for detecting a connection state of a plurality of High-Voltage devices after the High-Voltage devices are connected by the High-Voltage connectors, a High Voltage Interlock Loop (High Voltage Interlock Loop) function is an important function on the BMS, and other High-Voltage controllers also have the function, such as an EAC and the like; the high-voltage circuit fault detection device has the functions of detecting the connection state of a high-voltage connector in a high-voltage circuit and identifying the fault that the high-voltage connector is not connected or is accidentally disconnected; referring to fig. 1, the high voltage interlock loop, which connects the associated high voltage connectors in series in the system and detects their connection status, is shown connected in series by the low voltage line loop. The high-voltage devices in the high-voltage interlock include, but are not limited to, a compressor, a BMS, a DCDC, a MCU and a motor two-in-one controller, a PDU and an OBC.
As shown in fig. 4, a pure electric vehicle high-voltage interlock control system includes a plurality of high-voltage devices and control units thereof, the control unit of each high-voltage device detects an interlock connection fault thereof through a detection circuit, and determines whether the interlock fault is detected according to a detected state, an output end of each high-voltage device is connected to a VCU, and the VCU sends out a warning alarm according to a fault signal transmitted from the control unit of each high-voltage device. And the control unit of each high-voltage device is transmitted to the VCU through the whole vehicle CAN network, read by the VCU and perform uniform whole vehicle fault judgment.
The VCU receives the detection result signals of the control units of the high-voltage devices, identifies the high-voltage devices, then positions the high-voltage devices with the interlocking faults and sends out alarm reminding signals.
The control unit corresponding to each high-voltage device is adopted to detect respective interlocking state information, and the mode can save cost and avoid the cost generated by a new controller and the like; meanwhile, the wiring cost can be greatly reduced, so that the whole vehicle wiring space occupied during implementation is reduced. The control units of the high-voltage devices upload fault signals of whether interlocking is detected or not to the VCU, the VCU judges whether interlocking is in fault or not according to the detected signals, the VCU does not perform alarm processing when the uploading signals of all the control units are normal, and when any fault signal occurs in the uploaded interlocking fault detection data, the VCU sends out interlocking fault reminding through vehicle-mounted reminding signals, wherein the interlocking fault reminding comprises but is not limited to sending out alarm interlocking fault signals through instruments, display screens, alarm indicating lamps, alarm sounds and the like.
Take two controller in one of MCU and motor, DCDC, PDU two as examples, PDU's the control unit is used for detecting whether interlock between PDU and the DCDC has the trouble, and DCDC control unit is used for detecting whether the connection between DCDC and two controller in one of MCU and motor has the trouble, and two controller in one of MCU detect two controller in one of MCU and other high pressure interlock device's relation of connection, as shown in figure 1, can be the interlock information between the compressor. Then, after the respective control units detect the corresponding information, the information is uploaded to the VCU, and the VCU sends out an interlocking detection alarm signal according to the detection result of each control unit, namely the uploaded information.
The cost of controller can be saved to the control unit who adopts each high-voltage device, reduces the cost that realizes the interlocking and detect, and each high-voltage device all has the setting then can reduce the wiring cost in the car simultaneously, uploads to VCU simultaneously in, also can reduce cost and wiring, can also utilize current instrument or display screen of whole car to report to the police, can accomplish the significantly reduced who realizes the cost.
In the detection process, a voltage signal in a high-voltage interlocking loop can be detected through a detection circuit, whether an interlocking fault exists is judged from any person, and the detection circuit generally adopts a voltage transformer or a resistance voltage-dividing type voltage acquisition unit. As shown in fig. 2, the detection circuit includes a PWM square wave detection circuit or a dc source detection circuit to detect the high-voltage interlock fault state, and the control unit of the high-voltage device adopts a voltage acquisition mode to acquire the voltages V1 and V2 in the circuit, and as shown in fig. 2, there are two detection insulation modes: one is PWM square wave detection and the other is dc source detection. The two detection connection modes are the same, as shown in fig. 2, the left side is a dc source detection schematic diagram, and the right side is a PWM square wave detection schematic diagram. In the left figure, a direct current source is externally applied on the whole HVIL loop, and the high-voltage connector state is diagnosed by detecting the voltage at V1\ V2; similarly, in the right diagram, a controllable switch is introduced to also sense the voltage at V1\ V2, but by controlling the switch, two sets of values are available to identify more states. The voltage detection circuit can be arranged in any mode, and only the voltage detection circuit needs to be introduced into the control unit of the corresponding high-voltage device. The control unit of the high-voltage device judges the interlocking fault state by collecting the voltages at two ends of the interlocking connector in the PWM square wave detection circuit or the direct current source detection circuit.
The VCU adopts the identification mark in the communication protocol to identify each high-voltage device corresponding to the received detection result, thereby positioning the interlocking fault position. Because the control units of the high-voltage devices upload respective detection results, if all the control units are failure-free, the VCU does not perform control alarm, when any failure occurs, the VCU sends an alarm signal, and the VCU needs to identify and analyze the failure position.
As shown in fig. 3, a detection circuit for detecting an interlock failure is integrated on a PCB circuit board and connectors for two high-voltage devices for interlock connection are integrated on the PCB circuit board. In order to realize the convenient and reliable realization of the circuit, a newly added pwm detection circuit, a direct current source detection circuit and a voltage acquisition circuit are arranged on a PCB circuit board to facilitate the fault and the realization. Data acquisition is realized through a voltage detection and interlocking loop on the PCB, then a leading-out terminal enters a control unit for judgment, and then the data is uploaded to a VCU by the control unit. Fig. 5 shows a network topology diagram of each high-voltage device connected to the VCU through the CAN network, for uploading to the VCU through the vehicle-mounted CAN network.
The scheme mainly solves the problem of difficulty in troubleshooting when the high-voltage interlocking occurs in the pure electric vehicle; the high-voltage components of the whole vehicle independently control respective high-voltage interlocking, and the socket is connected by using the PCB. Each high-voltage component is used for detecting the interlocking problem of each single piece after connecting the high-voltage interlocking of the high-voltage component with the PCB, then transmitting the detection result from the bottom layer to the application layer and transmitting the detection result to the VCU end through the CAN network, and the VCU is used for performing unified fault judgment on the whole vehicle. The design is simpler, the length of the wire harness is shortened, and the development cost of a single vehicle is reduced.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (7)
1. The utility model provides a pure electric vehicles high pressure interlocking control system which characterized in that: the interlocking device comprises a plurality of high-voltage devices and control units thereof, wherein the control unit of each high-voltage device correspondingly detects the interlocking connection fault through a detection circuit and judges whether the interlocking fault exists or not according to the detected state, the output end of each high-voltage device is connected to a VCU, and the VCU sends out a warning alarm according to a fault signal transmitted by the control unit of each high-voltage device.
2. The pure electric vehicle high-voltage interlocking control system according to claim 1, characterized in that: and the control unit of each high-voltage device is transmitted to the VCU through the whole vehicle CAN network, read by the VCU and perform uniform whole vehicle fault judgment.
3. The pure electric vehicle high-voltage interlocking control system according to claim 1 or 2, characterized in that the VCU receives detection result signals of the control units of the high-voltage devices, identifies the high-voltage devices, then positions the high-voltage devices with interlocking faults and sends out alarm reminding signals.
4. The pure electric vehicle high-voltage interlocking control system as claimed in claim 1 or 2, characterized in that: the control unit of the high-voltage device adopts a PWM square wave detection loop or a direct current source detection loop to realize the detection of the high-voltage interlocking fault state.
5. The pure electric vehicle high-voltage interlocking control system according to claim 4, characterized in that: the control unit of the high-voltage device judges the interlocking fault state by collecting the voltages at two ends of the interlocking connector in the PWM square wave detection circuit or the direct current source detection circuit.
6. The pure electric vehicle high-voltage interlocking control system as claimed in any one of claims 1 to 4, characterized in that: a detection circuit for detecting an interlock fault is integrated on a PCB circuit board, and a connector for two high-voltage devices for interlock connection is integrated on the PCB circuit board.
7. The pure electric vehicle high-voltage interlocking control system as claimed in claim 1 or 2, characterized in that: and the VCU adopts the identification marks in the communication protocol to identify each high-voltage device corresponding to the received detection result, so as to locate the interlocking fault position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111459986.5A CN114030358A (en) | 2021-12-02 | 2021-12-02 | High-voltage interlocking control system of pure electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111459986.5A CN114030358A (en) | 2021-12-02 | 2021-12-02 | High-voltage interlocking control system of pure electric vehicle |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015139349A (en) * | 2014-01-24 | 2015-07-30 | シャープ株式会社 | connection system |
| CN105150856A (en) * | 2015-09-11 | 2015-12-16 | 安徽江淮汽车股份有限公司 | Fault diagnosis device and method of high-voltage system |
| CN108790827A (en) * | 2018-05-17 | 2018-11-13 | 铠龙东方汽车有限公司 | A kind of pure electric vehicle vehicle high-voltage interlocking control method |
| DE102019203209A1 (en) * | 2019-03-08 | 2020-09-10 | Zf Friedrichshafen Ag | Method and control device for switching a logging operating mode |
| CN113071320A (en) * | 2021-05-14 | 2021-07-06 | 奇瑞商用车（安徽）有限公司 | High-voltage interlocking system of electric automobile |
-
2021
- 2021-12-02 CN CN202111459986.5A patent/CN114030358A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015139349A (en) * | 2014-01-24 | 2015-07-30 | シャープ株式会社 | connection system |
| CN105150856A (en) * | 2015-09-11 | 2015-12-16 | 安徽江淮汽车股份有限公司 | Fault diagnosis device and method of high-voltage system |
| CN108790827A (en) * | 2018-05-17 | 2018-11-13 | 铠龙东方汽车有限公司 | A kind of pure electric vehicle vehicle high-voltage interlocking control method |
| DE102019203209A1 (en) * | 2019-03-08 | 2020-09-10 | Zf Friedrichshafen Ag | Method and control device for switching a logging operating mode |
| CN113071320A (en) * | 2021-05-14 | 2021-07-06 | 奇瑞商用车（安徽）有限公司 | High-voltage interlocking system of electric automobile |
Non-Patent Citations (1)
| Title |
|---|
| 李敬福，王洪佩, 北京理工大学出版社 * |
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