CN214001351U - Range-extended pure electric vehicle safety interlocking loop signal detection loop - Google Patents
Range-extended pure electric vehicle safety interlocking loop signal detection loop Download PDFInfo
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- CN214001351U CN214001351U CN202021560761.XU CN202021560761U CN214001351U CN 214001351 U CN214001351 U CN 214001351U CN 202021560761 U CN202021560761 U CN 202021560761U CN 214001351 U CN214001351 U CN 214001351U
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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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
- 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 utility model relates to an increase pure electric vehicle safety interlocking return circuit signal detection return circuit of form belongs to increase electric vehicle safety detection technical field, including vehicle control unit, its characterized in that, vehicle control unit as the center, be connected with discharge high pressure interlocking return circuit, the high pressure interlocking return circuit and the engine monitoring return circuit of charging respectively, vehicle control unit with discharge high pressure interlocking return circuit charge high pressure interlocking return circuit with the connection of engine monitoring return circuit is on-off control and connects, through the high level signal on the safety interlocking return circuit, just can detect the integrality and the continuity in entire system return circuit, unusual disconnection in the identification system return circuit. Therefore, the function of the whole vehicle can be guaranteed to be realized on the premise that the high-voltage electric system of the whole vehicle is complete through the design, and the driving safety and the high-voltage safety of the whole vehicle can be guaranteed on the premise that the high-voltage electric system of the whole vehicle is incomplete.
Description
Technical Field
The utility model belongs to the technical field of increase form electric motor car safety inspection, a detection return circuit is related to, specifically be increase form pure electric vehicle safety interlocking return circuit signal detection return circuit.
Background
In a range-extended pure electric vehicle, a whole vehicle high-voltage system comprises high-voltage components such as a power battery pack, a driving motor controller, a DC/DC converter, a generator controller and the like. In a conventional extended range electric vehicle system, a power battery pack is used as a power source, so that an interlock signal forms a single loop along other high-voltage components. If other high-voltage components are not connected or are abnormally disconnected, the battery management system can control the power battery pack to directly disconnect the high voltage. However, in the driving process, the driving safety can be seriously threatened when the situation occurs. When the vehicle is at rest, although the power battery is disconnected, the residual high-voltage current on the bus still has high-voltage safety hazards. Meanwhile, if the system fails, the range extender system charges the battery pack, and the damage is more serious.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned problem, designed an increase pure electric vehicle safety interlocking return circuit signal detection return circuit of form, can guarantee whole car driving safety and high-pressure safety when whole car high-voltage electrical system is incomplete.
The utility model discloses a concrete technical scheme is:
the signal detection circuit of the safety interlocking loop of the extended range type pure electric vehicle comprises a vehicle control unit, wherein the vehicle control unit is used as a center and is respectively connected with a discharging high-voltage interlocking loop, a charging high-voltage interlocking loop and an engine monitoring loop, and the vehicle control unit is in on-off control connection with the discharging high-voltage interlocking loop, the charging high-voltage interlocking loop and the engine monitoring loop.
The discharging high-voltage interlocking loop comprises a driving motor controller connected with the output end of the vehicle control unit, the driving motor controller is in control connection with a driving motor, the discharging high-voltage interlocking loop further comprises a battery management system, the battery management system is in control connection with a power battery pack, the power battery pack is in power supply connection with the driving motor, the battery management system is further in control connection with a DC/DC converter, and the output end of the DC/DC converter is connected with the signal input end of the vehicle control unit through a high-voltage part.
The charging high-voltage interlocking circuit comprises a generator and a generator controller in control connection with the generator, and further comprises a range extender controller, and the range extender controller and the vehicle control unit switch are in control connection with the generator.
The engine monitoring circuit comprises a generator controller, and the vehicle control unit, the generator controller and the range extender controller are jointly connected with the engine in a switch control mode.
The engine monitoring circuit further comprises a manual switch, and the manual switch is connected with the vehicle control unit, the engine controller and the range extender controller in a switch control mode.
The utility model has the advantages that:
the safety interlock loop design is composed of three paths of interlock loop signals. The signal of the discharging high-voltage interlocking loop connects the whole vehicle controller, the driving motor controller, the power battery pack, the battery management system, the DCDC and other high-voltage accessories in series to form a loop. The signal of the charging high-voltage interlocking loop connects the vehicle control unit, the generator controller and the range extender controller in series to form a loop. The signal of the engine monitoring circuit is a circuit formed by connecting the vehicle controller, the range extender controller and the engine controller in series, and a manual switch is connected in series in the third circuit and is provided with a locking device.
Through the high level signal on the safety interlocking loop, the integrity and the continuity of the whole system loop can be detected, and the abnormal disconnection in the system loop can be identified. Therefore, the function of the whole vehicle can be guaranteed to be realized on the premise that the high-voltage electric system of the whole vehicle is complete through the design, and the driving safety and the high-voltage safety of the whole vehicle can be guaranteed on the premise that the high-voltage electric system of the whole vehicle is incomplete.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the following specific embodiments and accompanying drawings, but the scope of protection and the implementation of the present invention are not limited thereto.
In a specific embodiment, as shown in fig. 1 of the specification, the extended range pure electric vehicle safety interlocking loop signal detection circuit comprises a vehicle control unit, wherein the vehicle control unit is used as a center and is respectively connected with a discharging high-voltage interlocking loop, a charging high-voltage interlocking loop and an engine monitoring loop, and the vehicle control unit is in on-off control connection with the discharging high-voltage interlocking loop, the charging high-voltage interlocking loop and the engine monitoring loop.
The discharging high-voltage interlocking loop comprises a driving motor controller connected with the output end of the vehicle control unit, the driving motor controller is in control connection with a driving motor, the discharging high-voltage interlocking loop further comprises a battery management system, the battery management system is in control connection with a power battery pack, the power battery pack is in power supply connection with the driving motor, the battery management system is further in control connection with a DC/DC converter, and the output end of the DC/DC converter is connected with the signal input end of the vehicle control unit through a high-voltage part.
The charging high-voltage interlocking circuit comprises a generator and a generator controller in control connection with the generator, and further comprises a range extender controller, and the range extender controller and the vehicle control unit switch are in control connection with the generator.
The engine monitoring circuit comprises an engine controller, and the whole vehicle controller, the engine controller and the range extender controller are connected with the engine in a switching control mode.
The engine monitoring circuit further comprises a manual switch, and the manual switch is connected with the vehicle control unit, the engine controller and the range extender controller in a switch control mode.
In the use process of the utility model,
in the three safety interlock loops of the present design, the first loop: the VCU of the whole vehicle controller serves as a source, a high-level signal is output, flows through a driving motor, a driving motor controller, a power battery pack, a battery management system, a DCDC and other high-voltage accessories through a high-voltage (bus) cable and a high-voltage connector, and finally returns to the whole vehicle controller, and the circuit is called a discharging high-voltage interlocking circuit.
The second loop is as follows: the vehicle control unit is also used as a source, a high-level signal is output, and the high-level signal flows through a generator, a generator controller, a range extender controller and other components through a high-voltage (bus) cable and a high-voltage connector and finally returns to the vehicle control unit, wherein the circuit is called a charging high-voltage interlocking circuit.
A third loop: the vehicle control unit is also used as a source, a high-level signal is output, flows through a range extender controller, an engine controller, a manual switch and other components, and finally returns to the vehicle control unit, and the circuit is called an engine monitoring circuit.
The first loop and the second loop are interlocking loops established by immediately outputting stable high-level signals after the whole vehicle controller is electrified at low voltage. And the third loop is a loop established by outputting a stable high-level signal only after the finished automobile controller is electrified on Ready at high voltage.
Typically, when the controller does not monitor the safety interlock signal, the system loop in the safety interlock loop is considered to be incomplete.
In the discharging high-voltage interlock loop, the battery management system is required to continuously monitor the high-voltage interlock signal in real time together with the vehicle controller. When a certain high-voltage component is not connected or abnormally disconnected, the battery management system can disconnect the high-voltage bus from the main control braking force battery pack, so that high-voltage safety is guaranteed.
In the charging high-voltage interlock loop, the range extender controller is required to continuously monitor the high-voltage interlock signal in real time together with the vehicle controller. When a certain high-voltage component is not connected or abnormally disconnected, the range extender controller can shut down the range extender before the vehicle controller, and the power generation control is stopped.
In the engine monitoring loop, an engine controller, a range extender controller and a vehicle control unit are required to continuously monitor the interlocking signal in real time. When the signal is low level or some component is not connected or abnormally disconnected, the engine controller can control the engine to stop according to the signal and send an instruction for not allowing the engine to start to the range extender controller. The range extender controller may also force the range extender system to shut down or not allow the range extender system to start up based on the signal. In special cases, the engine monitoring circuit can be disconnected through a manual switch so as to achieve the purpose of forcibly stopping the engine or not allowing the engine to start.
Under normal conditions, the vehicle control unit, the battery management system, the range extender controller and the engine controller can continuously monitor the level signal of the interlocking loop in real time.
When the discharge high-voltage interlocking signal detects abnormality:
when the vehicle is in a parking state, the vehicle controller immediately controls the high voltage of the whole vehicle or forbids the high voltage of the whole vehicle.
When the vehicle is in a driving state, the vehicle controller cannot immediately control the high voltage under the whole vehicle, so that the power interruption of the vehicle is avoided, the vehicle controller enters the time-delay high voltage control, and meanwhile, the fault alarm requires that a driver immediately stops by the side.
If the whole vehicle controller does not take measures within a certain time, the battery management system controls the low voltage automatically.
When the charging high-voltage interlocking signal detects abnormality:
when the vehicle is in a parking state, the range extender controller immediately controls the range extender to be closed, stops charging or forbids the range extender to be started. And then the vehicle controller enters high-voltage control under time delay and gives a fault alarm.
When the vehicle is in a running state, the range extender controller immediately controls the range extender to be closed, stops charging or forbids the range extender to be started. Meanwhile, the whole vehicle controller enters high-voltage control under time delay, gives a fault alarm and requires a driver to stop at the same time. The low-voltage command is issued after the range extender system is stopped.
If no measures are taken by the range extender controller within a certain time, the whole vehicle controller can directly control the high voltage under the whole vehicle.
If the charging high-voltage loop and the discharging loop are two relatively independent high-voltage loops and the charging high-voltage interlocking signal is abnormal, the vehicle controller can only control to cut off the high voltage in the charging high-voltage loop, keep the high voltage in the discharging loop and control the vehicle to enter a limping state.
When the engine monitoring interlocking signal detects an abnormality:
when the vehicle is in a parking state, the vehicle control unit and the range extender control unit immediately control the engine to stop or prohibit the engine from starting.
When the vehicle is in a running state, the vehicle control unit and the range extender control unit immediately control the engine to stop or prohibit the engine from starting. Meanwhile, the vehicle controller needs to control the vehicle to enter a limping state and give a fault alarm.
If the whole vehicle controller and the range extender controller do not take measures within a certain time, the engine controller automatically controls the stop.
Claims (5)
1. The signal detection circuit of the safety interlocking loop of the extended-range pure electric vehicle comprises a vehicle controller and is characterized in that the vehicle controller is used as a center and is respectively connected with a discharging high-voltage interlocking loop, a charging high-voltage interlocking loop and an engine monitoring loop, and the vehicle controller is connected with the discharging high-voltage interlocking loop, the charging high-voltage interlocking loop and the engine monitoring loop in a switch control manner.
2. The extended range electric vehicle safety interlock loop signal detection circuit of claim 1, wherein: the discharging high-voltage interlocking loop comprises a driving motor controller connected with the output end of the vehicle control unit, the driving motor controller is in control connection with a driving motor, the discharging high-voltage interlocking loop further comprises a battery management system, the battery management system is in control connection with a power battery pack, the power battery pack is in power supply connection with the driving motor, the battery management system is further in control connection with a DC/DC converter, and the output end of the DC/DC converter is connected with the signal input end of the vehicle control unit through a high-voltage part.
3. The extended range electric vehicle safety interlock loop signal detection circuit of claim 1, wherein: the charging high-voltage interlocking circuit comprises a generator and a generator controller in control connection with the generator, and further comprises a range extender controller, and the range extender controller and the vehicle control unit switch are in control connection with the generator.
4. The extended range electric vehicle safety interlock loop signal detection circuit of claim 1, wherein: the engine monitoring circuit comprises an engine controller, and the whole vehicle controller, the engine controller and the range extender controller are connected with the engine in a switching control mode.
5. The extended range electric vehicle safety interlock loop signal detection circuit of claim 4, wherein: the engine monitoring circuit further comprises a manual switch, and the manual switch is connected with the vehicle control unit, the engine controller and the range extender controller in a switch control mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021560761.XU CN214001351U (en) | 2020-07-31 | 2020-07-31 | Range-extended pure electric vehicle safety interlocking loop signal detection loop |
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| CN202021560761.XU CN214001351U (en) | 2020-07-31 | 2020-07-31 | Range-extended pure electric vehicle safety interlocking loop signal detection loop |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114506218A (en) * | 2022-01-06 | 2022-05-17 | 山东汽车制造有限公司 | Limping control method of electric automobile |
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- 2020-07-31 CN CN202021560761.XU patent/CN214001351U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114506218A (en) * | 2022-01-06 | 2022-05-17 | 山东汽车制造有限公司 | Limping control method of electric automobile |
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