CN113043859A - Electric automobile awakening system, electric automobile and electric automobile awakening method - Google Patents
Electric automobile awakening system, electric automobile and electric automobile awakening method Download PDFInfo
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- CN113043859A CN113043859A CN202110517213.1A CN202110517213A CN113043859A CN 113043859 A CN113043859 A CN 113043859A CN 202110517213 A CN202110517213 A CN 202110517213A CN 113043859 A CN113043859 A CN 113043859A
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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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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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
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention provides an electric automobile awakening system, an electric automobile and an electric automobile awakening method, relates to the technical field of automobiles, and aims to solve the technical problem that the electric automobile awakening system is poor in stability. The electric automobile awakening system comprises a plurality of control units, wherein the input port and the output port of each control unit are connected with a hard wire and are in communication connection with all the hard wires, and the bus port of each control unit is connected with a CAN bus and is in communication connection with all the CAN buses. The control unit receives a first wake-up signal, and the first control unit receiving the first wake-up signal is awakened; the first awakened control unit awakens other control units through the CAN bus. When one or more of the other control units are not woken up, the first woken-up control unit wakes up the non-woken-up control unit through the hard wire. Each control unit can receive a first awakening signal, and the first awakening signal and the control unit are discretized, so that the stability of the electric automobile awakening system is improved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an electric automobile awakening system, an electric automobile and an electric automobile awakening method.
Background
The electric automobile has the advantages of high efficiency, energy conservation and low pollution, and gradually becomes the main development direction of the modern automobile. In an electric vehicle, a power system is an essential component, and a plurality of parts of the power system are usually equipped with control units respectively, and the control units interact with each other through information, so that the whole power system is formed.
With the trend of diversified and complicated functions of electric vehicles, different functions are often coordinated by different single or multiple control units. In the electric vehicle wake-up system, wake-up sources corresponding to different functions are also various, and the wake-up source sends a first wake-up signal when being triggered, for example, a common vehicle key wake-up signal, a fast charging gun insertion signal when performing direct current fast charging, a slow charging gun insertion signal when performing alternating current slow charging, and the like.
In the related art, a Vehicle Control Unit (VCU) generally receives a first wake-up signal and wakes up other Control units. However, when the whole vehicle controller has a function or performance defect, other control units cannot be waken up, and the stability of the electric vehicle wakening-up system is poor.
Disclosure of Invention
In view of the foregoing problems, embodiments of the present invention provide an electric vehicle wake-up system, an electric vehicle, and an electric vehicle wake-up method, which are used to improve the stability of the electric vehicle wake-up system.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
in a first aspect, an embodiment of the present invention provides an electric vehicle wake-up system, which includes: each control unit comprises an input port, an output port and a bus port, each input port and each output port are connected with a hard wire, all the hard wires are in communication connection, each bus port is connected with a CAN bus, and all the CAN buses are in communication connection; the control unit is used for receiving a first wake-up signal of a wake-up source, and the first control unit receiving the first wake-up signal is woken up; the first awakened control unit awakens other control units through the CAN bus; when one or more of the other control units are not woken up, the first woken up control unit can wake up the control unit which is not woken up through the hard wire.
The electric automobile awakening system provided by the embodiment of the invention has the following advantages:
the electric vehicle awakening system provided by the embodiment of the invention comprises a plurality of control units, wherein each control unit comprises an input port, an output port and a bus port, each input port and each output port are connected with a hard wire, and all the hard wires are in communication connection so that each control unit can communicate with each other through the hard wires; each bus port is connected with one CAN bus, and all the CAN buses are in communication connection, so that each control unit CAN communicate through the CAN buses. The control unit is used for receiving a first wake-up signal of a wake-up source, and the first control unit receiving the first wake-up signal is awakened; the first awakened control unit awakens other control units through the CAN bus. Compared with the prior art in which one control unit receives the first wake-up signal and wakes up other control units, the electric vehicle wake-up system in the embodiment of the invention has the advantages that the plurality of control units can receive the first wake-up signal and wake up other control units, so that the control units and the wake-up signal are discretized, the positions of the control units are equal, and the stability of the power control system is improved. In addition, through setting up the redundant hard wire, when one or more in other control unit are not awaken up, the control unit that the first control unit that awakens up through the hard wire, namely when CAN bus part is failed even totally fails, other control unit still CAN be awaken up, has further improved the reliability of power control unit.
According to the electric vehicle awakening system, the number of the control units is three, and the three control units are respectively a vehicle control unit, a battery management system and a charging and distributing unit.
According to the electric automobile awakening system, the awakening source comprises a plurality of groups, and the plurality of groups of awakening sources are in one-to-one correspondence with the plurality of control units and are connected with the plurality of control units.
According to the electric vehicle wake-up system, the first wake-up signal is one of a remote control wake-up signal, a key wake-up signal, a direct current charge wake-up signal, an alternating current charge wake-up signal and a timing wake-up signal.
The electric vehicle awakening system comprises network management based on CAN communication.
In a second aspect, the embodiment of the invention provides an electric vehicle, which includes the electric vehicle wake-up system as described above. The electric vehicle in the embodiment of the invention comprises the electric vehicle wake-up system, so that the electric vehicle wake-up system has the advantage of better stability, and specific description is referred to above and is not repeated herein.
In a third aspect, an embodiment of the present invention provides an electric vehicle wake-up method, where the electric vehicle includes a plurality of control units, and the electric vehicle wake-up method includes: when any one of the control units receives a first wake-up signal of a wake-up source, the first wake-up control unit wakes up other control units through a CAN bus; when one or more of the other control units are not woken up, the first woken up control unit can wake up the control unit which is not woken up through the hard wire.
The electric automobile awakening method provided by the embodiment of the invention has the following advantages:
in the electric vehicle awakening method provided by the embodiment of the invention, the electric vehicle comprises a plurality of control units, when any one of the control units receives a first awakening signal of an awakening source, the first awakened control unit awakens other control units through a CAN bus; when one or more of the other control units are not woken up, the first woken up control unit wakes up the non-woken up control unit through hard wire. In the embodiment of the invention, a plurality of control units are arranged, and each control unit can receive the first wake-up signal and wake up other control units, so that the control units and the wake-up signals are discretized, the status of each control unit is equal, and the stability of waking up the electric automobile is improved. In addition, when one or more of the other control units are not awakened, the first awakened control unit CAN also awaken the control unit which is not awakened through a hard wire, namely when the CAN bus is partially or completely failed, the other control units CAN still be awakened, and the reliability of awakening the electric automobile is further improved.
According to the electric vehicle awakening system, the awakening of the first awakened control unit to other control units through the CAN bus comprises the following steps: the first awakened control unit sends a second awakening signal to other control units through the CAN bus; and the control unit receiving the second wake-up signal sends a feedback signal to the first awakened control unit through the CAN bus.
According to the electric vehicle awakening system, when the first awakened control unit does not receive all the feedback signals within the preset time, the first awakened control unit sends the third awakening signals to other control units through the hard wire.
According to the electric vehicle awakening system, when the first awakened control unit does not receive all the feedback signals within the preset time, the first awakened control unit sends the third awakening signal to the control unit which does not send the feedback signals through the hard wire.
In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions described above, other technical problems that can be solved by the electric vehicle wake-up system, the electric vehicle, and the electric vehicle wake-up method provided by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be further described in detail in specific embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a first electric vehicle wake-up system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a second electric vehicle wake-up system according to an embodiment of the invention;
fig. 3 is a schematic diagram of a third electric vehicle wake-up system according to an embodiment of the invention.
Description of reference numerals:
100-a control unit; 110-vehicle control unit;
111-a first input port; 112-a first output port;
113 — a first bus port; 120-a battery management system;
121-a second input port; 122-a second output port;
123-a second bus port; 130-a charging and distribution unit;
131-a third input port; 132-a third output port;
200-CAN bus; 300-hard wire.
Detailed Description
In the related art, an electric vehicle wake-up system generally includes a plurality of control units, and each control unit is communicatively connected to each other through a CAN bus (Controller Area Network). Only one of the plurality of control units is configured to receive a first wake-up signal of a wake-up source. The control unit receives the first wake-up signal and then wakes up the first wake-up signal, and the woken-up control unit wakes up other control units through the CAN bus. However, the control unit receives the first wake-up signals of all wake-up sources, so that a fault is likely to occur, and the stability of the electric vehicle wake-up system is poor.
In view of this, an embodiment of the present invention provides an electric vehicle wake-up system, where the electric vehicle wake-up system includes a plurality of control units, the plurality of control units are in communication connection with each other through a CAN bus, and each control unit is configured to receive a first wake-up signal of a wake-up source and wake up other control units through the CAN bus, so that the control units and the wake-up signals are discretized, and the statuses of the control units are equal, thereby improving the stability of the electric vehicle wake-up system. In addition, a plurality of control units are connected through hard-line communication, when the CAN bus is partially or completely failed, other control units CAN still be awakened, and the reliability of the electric automobile awakening system is further improved.
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. 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.
Example one
The electric vehicle generally includes an electric vehicle wake-up system, which is configured to wake up a plurality of control units in the electric vehicle, so that the control units are switched from a sleep mode to an operating mode to implement normal driving of the electric vehicle.
It can be understood that when the control unit is in the sleep mode, the power consumption of the electric vehicle is small; when the control unit is in a working mode, the control unit controls the corresponding modules to complete respective targets and functions. For example, the vehicle controller controls a power system to realize driving, parking, cruising, and the like.
Referring to fig. 1, an electric vehicle wake-up system generally includes a plurality of control units 100. The electric vehicle wake-up System includes at least two of a Body Control Module (BCU), a Cruise Control System (CCS), a Vehicle Control Unit (VCU), a Battery Management System (BMS), a charging and distribution unit (On board charger (OBC), a gateway (CGW), a high-voltage to low-voltage direct current converter (DC/DC), and the like.
As shown IN fig. 1, each control unit 100 includes an input port at IN shown IN fig. 1, an output port at OUT shown IN fig. 1, and a bus port at CAN shown IN fig. 1.
Both the input port and the output port may be digital ports, the output port of the control unit 100 is used for outputting signals, for example, the output port of the control unit 100 outputs high level signals, and the input port of the control unit 100 is used for receiving signals, for example, the input port of the control unit 100 reads in high level signals.
One hard wire 300 is connected to each input port of the control unit 100 and each output port of the control unit 100, and all the hard wires 300 are connected in communication. The hard wire 300 is a transmission line for transmitting a logic level, and the control units 100 can perform bidirectional communication via the hard wire 300.
Illustratively, the hard wire includes a plurality of first hard wires, the input port of each control unit 100 and the output port of each control unit 100 are electrically connected to one end of one first hard wire, and the other end of each first hard wire is electrically connected to the second hard wire. Or, the input unit of each control unit 100 or the output unit of each control unit 100 is connected to one end of a first hard wire, and the other ends of the first hard wires converge to a point, that is, the input port of each control unit 100 and the output port of each control unit 100 are connected in a star shape.
One CAN bus 200 is connected to each bus port of the control unit 100, and all the CAN buses 200 are communicatively connected. Illustratively, the CAN bus 200 includes a plurality of first CAN buses. The bus port of each control unit 100 is electrically connected to one end of a first CAN bus, the other end of each first CAN bus is electrically connected to a second CAN bus, and each control unit 100 CAN communicate with each other through the CAN bus 200.
The control unit 100 is configured to receive a first wake-up signal of a wake-up source, where the control unit 100 that receives the first wake-up signal is first awakened; the first awakened control unit 100 wakes up the other control units 100 through the CAN bus 200. The wake-up sources may include multiple groups, and the multiple groups of wake-up sources correspond to the multiple control units 100 one to one.
The wake-up source causing the control unit 100 to wake up may comprise a plurality of wake-up sources, each of which transmits a first wake-up signal. For example, the first wake-up signal may be one of a key wake-up signal sent when a key is plugged in and powered on, a remote control wake-up signal sent when a vehicle is powered on by remote control, a direct current charge wake-up signal (fast charge gun plugging signal) or an alternating current charge wake-up signal (slow charge gun plugging signal) sent when a charging pile is connected, and a timing wake-up signal sent by a timing chip.
The plurality of wake-up sources (e.g., M) may be divided into a plurality of groups (e.g., N groups, and N is less than or equal to M), the number of the control unit 100 may be greater than or equal to the number of groups of wake-up sources, and the control unit 100 receives at most the first wake-up signal of one group of wake-up sources. Illustratively, the wake-up sources are divided into three groups according to the function and/or position relationship, and the control unit 100 includes three wake-up sources, and each control unit 100 corresponds to one group of wake-up sources.
When the wake-up sources are divided into three groups, the first wake-up signals triggered and sent by the wake-up sources are also divided into three groups, that is, the first wake-up signals corresponding to different wake-up sources are divided into three signal groups. For example, the key wake-up signal, remote control wake-up signal, dc charging wake-up signal, ac charging wake-up signal, and timing wake-up signal are divided into three groups. Specifically, the key wake-up signal and the remote control wake-up signal are a first group of signals, the direct current charge wake-up signal and the alternating current charge wake-up signal are a second group of signals, and the timing wake-up signal is a third group of signals.
The number of control units 100 is three, one of the three control units 100 receiving the first set of signals, another one of the three control units 100 receiving the second set of signals, and the last one of the three control units 100 receiving the third set of signals.
Referring to fig. 2 and 3, the three control units 100 may be the vehicle control unit 110, the battery management system, and the charging and distributing unit, respectively, and hereinafter, the electric vehicle wake-up system and the working process thereof will be described in detail by taking the three control units 100 as the vehicle control unit 110, the battery management system 120, and the charging and distributing unit 130, respectively, as an example. Of course, the embodiment of the present invention is not limited, and the three control units 100 may be other controllers, and the number of the control units 100 may be two, four, or more than four.
The vehicle control unit 110 receives the first set of signals, the battery management system 120 receives the second set of signals, and the charging and distribution unit 130 receives the third set of signals. As shown in fig. 2 and 3, the vehicle control unit 110 includes a first input port 111, a first output port 112, and a first bus port 113, where the first input port 111 and the first output port 112 are respectively connected to one end of a hard wire 300, and the first bus port 113 is connected to one end of a CAN bus 200.
The battery management system 120 includes a second input port 121, a second output port 122 and a second bus port 123, wherein the second input port 121 and the second output port 122 are respectively connected to one end of a hard wire 300, and the second bus port 123 is connected to one end of a CAN bus 200.
The charging power distribution unit 130 includes a third input port 131, a third output port 132, and a third bus port 133, where the third input port 131 and the third output port 132 are respectively connected to one end of a hard wire 300, and the third bus port 133 is connected to one end of a CAN bus 200.
Referring to fig. 2, the other end of the hard wire 300 may be connected to another hard wire 300 so that all of the hard wires 300 are communicatively connected; alternatively, referring to FIG. 3, the other ends of the hard-wires 300 may converge to allow all of the hard-wires 300 to be communicatively coupled.
With continued reference to fig. 2 and 3, the other end of the CAN bus 200 is connected to another CAN bus 200; alternatively, the other end of the CAN bus 200 may converge. When the number of the control units 100 is three as shown in fig. 2 and 3, there is no difference in the connection manner of the two CAN buses 200.
When a certain wake-up source is triggered, the wake-up source sends a first wake-up signal, where the first wake-up signal is a first group of signals, a second group of signals, or a third group of signals, the control unit 100 corresponding to the signal group including the first wake-up signal receives the first wake-up signal, the control unit 100 receiving the first wake-up signal is first woken up, and the first woken-up control unit 100 wakes up other control units 100 through the CAN bus 200.
For example, when the key is plugged, a key wake-up signal is sent, where the key wake-up signal is a first group of signals, the first group of signals is directly connected to the vehicle controller 110, the vehicle controller 110 is woken up first, and after the vehicle controller 110 is woken up, the battery management system 120 and the charging and distribution unit 130 are woken up through the CAN bus 200.
Or, when the charging pile is connected, a direct current charging wake-up signal is sent, the direct current charging wake-up signal is a second group of signals, the second group of signals are directly connected with the battery management system 120, the battery management system 120 is waken up by a first one, and after the battery management system 120 is waken up, the vehicle control unit 110 and the charging and distributing unit 130 are waken up through the CAN bus 200.
The electric vehicle wake-up system includes network management based on CAN communication to control the operation of each control unit 100. The network management based on CAN communication may include Automotive Open System Architecture (AUTOSAR) network management.
When all other control units 100 are awakened, the electric vehicle enters the next working process. When one or more of the other control units 100 are not woken up, the first woken up control unit 100 wakes up the non-woken up control unit 100 via the hard wire 300.
In some possible examples, the vehicle controller 110 is woken up by the first, the vehicle controller 110 sends a second wake-up signal to other control units 100 through the CAN bus 200 and according to the network management based on CAN communication, and the control unit 100 receiving the second wake-up signal sends a feedback signal (e.g., handshake packet) through the CAN bus 200. When the vehicle control unit 110 does not receive all the feedback signals within the preset time, the vehicle control unit 110 sends a third wake-up signal, for example, a high-level signal, to the other control units 100 or to the control units 100 that do not send the feedback signals through the hard wire 300, and the control units 100 that receive the third wake-up signal are woken up.
For example, the vehicle control unit 110 sends a second wake-up signal to the battery management system 120 and the charging and distributing unit 130 through the CAN bus 200, and the battery management system 120 and/or the charging and distributing unit 130 sends a feedback signal through the CAN bus 200 when receiving the second wake-up signal.
When the vehicle control unit 110 does not receive the feedback signal of the battery management system 120 and/or the charging and distributing unit 130 within the preset time, the first output port 112 of the vehicle control unit 110 sends a high level signal to the second input port 121 of the battery management system 120 and the third input port 131 of the charging and distributing unit 130 through the hard wire 300, and the input ports of the second input port 121 of the battery management system 120 and the third input port 131 of the charging and distributing unit 130 read the high level signal and are awakened by the high level signal. When the CAN bus 200 is partially or completely failed, the redundant hard wire 300 CAN improve the stability of the electric automobile awakening system.
It is understood that the battery management system 120 or the charging and power distribution unit 130 is awakened first, and the awakening process of the electric vehicle may refer to the awakening process when the vehicle controller 110 is awakened first, which is not described herein again.
The electric vehicle awakening system provided by the embodiment of the invention comprises a plurality of control units 100, wherein each control unit 100 comprises an input port, an output port and a bus port, each input port and each output port are connected with one hard wire 300, and all the hard wires 300 are in communication connection, so that the control units 100 can communicate with each other through the hard wires 300; each bus port is connected with one CAN bus 200, and all the CAN buses 200 are connected in a communication way, so that the control units 100 CAN communicate with each other through the CAN buses 200. The control unit 100 is configured to receive a first wake-up signal of a wake-up source, where the control unit 100 that receives the first wake-up signal is first awakened; the first awakened control unit 100 wakes up the other control units 100 through the CAN bus 200. In the electric vehicle wake-up system in the embodiment of the present invention, the plurality of control units 100 may receive the first wake-up signal and wake up other control units 100, so that the control units 100 are discretized from the wake-up signal, the status of each control unit 100 is equal, and the stability of the power control system is improved. In addition, by providing the redundant hard wire 300, when one or more of the other control units 100 are not woken up, the first woken-up control unit 100 wakes up the non-woken-up control unit 100 through the hard wire 300, further improving the reliability of the power control unit 100.
Example two
Referring to fig. 1, the electric vehicle includes a plurality of control units 100. For example, an electric vehicle may include at least two of a body control module (BCU), a constant speed Cruise Control System (CCS), a Vehicle Control Unit (VCU), a Battery Management System (BMS), a charging and distribution unit (OBC), a gateway (CGW), a high voltage direct current to low voltage direct current converter (DC/DC).
The electric automobile awakening method comprises the following steps: when any control unit 100 in the plurality of control units 100 receives a first wake-up signal of a wake-up source, the first wake-up control unit 100 wakes up other control units 100 through the CAN bus 200; when one or more of the other control units 100 are not woken up, the first woken up control unit 100 wakes up the non-woken up control unit 100 via the hard wire 300.
Any one control unit 100 of the plurality of control units 100 can receive the first wake-up signal, and the status between the control units 100 is approximately equal, for example, each control unit 100 can receive the first wake-up signal with the same probability, so that the control unit 100 and the first wake-up signal are discretized, all the first wake-up signals are prevented from being concentrated by one control unit 100, the dependence degree of the electric vehicle on the control unit 100 is reduced, and the stability of the power control system is improved.
The wake-up source can be various, different wake-up sources send different first wake-up signals, and the first wake-up signal can be one of a key wake-up signal, a remote control wake-up signal, a direct current charge wake-up signal, an alternating current charge wake-up signal and a timing wake-up signal. For example, the wake-up sources may be divided into a plurality of groups, and each control unit 100 may receive at most the first wake-up signal of one group of wake-up sources.
When the wake-up source is triggered, the wake-up source sends a first wake-up signal to the control unit 100 corresponding to the group in which the wake-up source is located, the first wake-up signal is received, the first wake-up signal is woken up, and the first woken-up control unit 100 sends a second wake-up signal to other control units 100 through the CAN bus 200; the control unit 100 receiving the second wake-up signal sends a feedback signal to the first wake-up control unit 100 through the CAN bus 200. When the first awakened control unit 100 does not receive all feedback signals within the preset time, the first awakened control unit 100 awakens the control unit 100 which is not awakened through the hard wire 300.
For example, when the first awakened control unit 100 does not receive all feedback signals within the preset time, the first awakened control unit 100 sends a third awakening signal to the other control units 100 through the hard wire 300. Or, when the first awakened control unit 100 does not receive all feedback signals within the preset time, the first awakened control unit 100 sends a third awakening signal to the control unit 100 which does not send the feedback signals through the hard wire 300.
Referring to fig. 2, taking an example that an electric vehicle includes three control units 100, and the three control units 100 are a vehicle control unit 110, a battery management system 120, and a charging and power distribution unit 130, an electric vehicle wake-up method is described in detail.
The vehicle control unit 110 includes a first input port 111, a first output port 112, and a first bus port 113, where the first input port 111 and the first output port 112 are respectively connected to one end of a hard wire 300, and the first bus port 113 is connected to one end of a CAN bus 200.
The battery management system 120 includes a second input port 121, a second output port 122 and a second bus port 123, wherein the second input port 121 and the second output port 122 are respectively connected to one end of a hard wire 300, and the second bus port 123 is connected to one end of a CAN bus 200.
The charging power distribution unit 130 includes a third input port 131, a third output port 132, and a third bus port 133, where the third input port 131 and the third output port 132 are respectively connected to one end of a hard wire 300, and the third bus port 133 is connected to one end of a CAN bus 200.
Referring to fig. 2 and 3, the other end of the hard wire 300 may be connected to another hard wire 300 so that all of the hard wires 300 are communicatively connected, or the other ends of the hard wires 300 may converge to a point so that all of the hard wires 300 are communicatively connected. As shown in fig. 2 and 3, the other end of the CAN bus 200 is connected to another CAN bus 200, or the other ends of the CAN buses 200 may converge. When the number of the control units 100 is three, there is no difference in the connection manner of the two kinds of CAN buses 200.
When any one of the vehicle control unit 110, the battery management system 120 and the charging and distributing unit 130 receives the first wake-up signal, for example, the vehicle control unit 110 is first woken up, and after the vehicle control unit 110 is woken up, the vehicle control unit 110 sends a second wake-up signal to the battery management system 120 and the charging and distributing unit 130 through the CAN bus 200. The battery management system 120 sends a first feedback signal to the vehicle control unit 110 through the CAN bus 200 after receiving the second wake-up signal, and the charging and distributing unit 130 sends a second feedback signal to the vehicle control unit 110 through the CAN bus 200 when receiving the second wake-up signal.
When the vehicle control unit 110 receives the first feedback signal and the second feedback signal, the vehicle control unit 110, the battery management system 120, and the charging and distributing unit 130 are all awakened, and the electric vehicle performs the next working process. If the vehicle control unit 110 does not receive the first feedback signal and/or the second feedback signal within the preset time, the output port of the vehicle control unit 110 at least sends a third wake-up signal to the control unit 100 that does not send the feedback signal through the hard wire 300.
In one possible example, the vehicle control unit 110 does not receive the first feedback signal within the preset time, that is, the vehicle control unit 110 wakes up the charging and power distribution unit 130 through the CAN bus 200. The first output port 112 of the hybrid controller 110 outputs a high level through the hard wire 300, the second input port 121 of the battery management system 120 and the third input port 131 of the charging and power distribution unit 130 read the high level and are activated by the high level, and the battery management system 120 and the charging and power distribution unit 130 are awakened.
In another possible example, the vehicle control unit 110 does not receive the first feedback signal within the preset time, that is, the vehicle control unit 110 wakes up the charging and power distribution unit 130 through the CAN bus 200. The first output port 112 of the vehicle control unit 110 outputs a high level through the hard wire 300, the second input port 121 of the battery management system 120 reads the high level, and is activated by the high level, and the battery management system 120 is awakened.
The electric vehicle awakening method provided by the embodiment of the invention comprises a plurality of control units 100, wherein when any control unit 100 in the plurality of control units 100 receives a first awakening signal of an awakening source, the first awakened control unit 100 awakens other control units 100 through a CAN bus 200; when one or more of the other control units 100 are not woken up, the first woken up control unit 100 wakes up the non-woken up control unit 100 via the hard wire 300. In the embodiment of the invention, the plurality of control units 100 are arranged, and each control unit 100 can receive the first wake-up signal and wake up other control units 100, so that the control units 100 and the wake-up signals are discretized, the status of each control unit 100 is equal, and the stability of the power control system is improved. In addition, when one or more of the other control units 100 are not woken up, the first woken-up control unit 100 CAN also wake up the control unit 100 which is not woken up through the hard wire 300, that is, when the CAN bus 200 is partially or completely failed, the other control units 100 CAN still be woken up, thereby further improving the reliability of the power control unit 100.
The embodiments or implementation modes in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
In the description of the present specification, references to "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The electric automobile awakening system is characterized by comprising a plurality of control units, wherein each control unit comprises an input port, an output port and a bus port, each input port and each output port are connected with a hard wire, all the hard wires are in communication connection, each bus port is connected with a CAN bus, and all the CAN buses are in communication connection;
the control unit is used for receiving a first wake-up signal of a wake-up source, and the first control unit receiving the first wake-up signal is woken up; the first awakened control unit awakens other control units through the CAN bus; when one or more of the other control units are not woken up, the first woken up control unit can wake up the control unit which is not woken up through the hard wire.
2. The electric vehicle wake-up system according to claim 1, wherein the number of the control units is three, and the three control units are respectively a vehicle control unit, a battery management system and a charging and power distribution unit.
3. The electric vehicle wake-up system according to claim 1, wherein the wake-up sources comprise a plurality of groups, and the plurality of groups of wake-up sources are in one-to-one correspondence with and connected to the plurality of control units.
4. The electric vehicle wake-up system according to any one of claims 1 to 3, wherein the first wake-up signal is one of a remote control wake-up signal, a key wake-up signal, a DC charging wake-up signal, an AC charging wake-up signal and a timed wake-up signal.
5. The electric vehicle wake-up system according to any of the claims 1 to 3, characterized in that it comprises a network management based on CAN communication.
6. An electric vehicle, characterized in that it comprises an electric vehicle wake-up system according to any one of claims 1 to 5.
7. An electric vehicle awakening method is characterized in that an electric vehicle comprises a plurality of control units, and the electric vehicle awakening method comprises the following steps:
when any one of the control units receives a first wake-up signal of a wake-up source, the first wake-up control unit wakes up other control units through a CAN bus;
when one or more of the other control units are not woken up, the first woken up control unit can wake up the control unit which is not woken up through a hard wire.
8. The electric vehicle wake-up method according to claim 7, wherein the first awakened control unit awakens other control units through the CAN bus comprises:
the first awakened control unit sends a second awakening signal to other control units through the CAN bus;
and the control unit receiving the second wake-up signal sends a feedback signal to the first awakened control unit through the CAN bus.
9. The electric vehicle awakening method according to claim 8, wherein when the first awakened control unit does not receive all the feedback signals within a preset time, the first awakened control unit sends a third awakening signal to the other control units through the hard wire.
10. The electric vehicle wake-up method according to claim 8, wherein when the first awakened control unit does not receive all the feedback signals within a preset time, the first awakened control unit sends a third wake-up signal to the control unit which does not send the feedback signals through the hard wire.
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