CN112440775A - Charging awakening system and method of electric automobile - Google Patents
Charging awakening system and method of electric automobile Download PDFInfo
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- CN112440775A CN112440775A CN201910833184.2A CN201910833184A CN112440775A CN 112440775 A CN112440775 A CN 112440775A CN 201910833184 A CN201910833184 A CN 201910833184A CN 112440775 A CN112440775 A CN 112440775A
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
- B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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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
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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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a charging wake-up system and a charging wake-up method for an electric automobile. According to the invention, through the design of gun insertion awakening and scheduled awakening, the mode of charging awakening is effectively improved, and the charging is more convenient; the charging opportunity is selectable, the vehicle controller enters a dormant state when charging is reserved, the charging cost is saved, the load of a power grid is reduced, the electric vehicle is more environment-friendly, and the charging efficiency and the customer experience satisfaction degree are effectively improved.
Description
Technical Field
The invention relates to the technical field of electric automobile charging, in particular to a charging awakening system and method of an electric automobile.
Background
With the rapid development of new energy vehicles, charging technology and charging safety of electric vehicles are also paid more and more attention by people. Fig. 1 is a topological diagram of a dc charging interface of an electric vehicle, in which an off-board charger is connected to the electric vehicle via a cable and a vehicle interface: DC + and DC-are interfaces for transferring direct current heavy current in a direct current charging path and are controlled by high-voltage relays on electric vehicles and off-board chargers, S + and S-are CAN channels for information interaction, CC1 and CC2 are used for connection confirmation, and A + and A-CAN be used for supplying power to a vehicle controller.
In the charging control process, a vehicle plug and a vehicle socket in a vehicle interface are connected, the overall scheme of the electric vehicle can automatically start a certain trigger mechanism (such as opening a charging door, connecting the vehicle plug and the vehicle socket or performing function trigger setting on a charging button, a switch and the like of the vehicle), and the electric vehicle is in a non-driving state through interlocking or other control measures. After the vehicle interface is connected with the electric vehicle, the off-board charger judges the connection state through the voltage of the detection point 1, and when the voltage of the detection point 1 reaches a set value, the off-board charger controller is judged to be completely connected with the vehicle interface. At the moment, the vehicle controller detects the voltage of the detection point 2, and when the voltage of the detection point 2 reaches a set value, the vehicle interface is judged to be completely connected with the electric automobile. And the vehicle controller and the non-vehicle charger controller which completes insulation detection are in periodic handshake communication through S + and S-.
There is no provision in GB/T18487.1 for the vehicle to wake up, but if the vehicle controller is in a sleep state when the gun is plugged in, the vehicle controller cannot know the connection state, cannot know the charging request, and CAN communication cannot be connected, so the controller is in a wake up state after the gun is plugged in. One way is to insert the charging gun when the key is not pulled out, or to unlock the key after inserting the gun, which is inconvenient for the driver and the customer experience is not friendly.
In addition, in life, a driver has a need to control the charging start time, or a charger has a need to distribute electric energy, which requires that a vehicle controller has a function of reserving charging. However, many electric vehicles in the market do not support the scheduled charging, only support the gun insertion to charge, and do not have the scheduled wake-up function, so that the charging time cannot be controlled by a client, and the electric energy distribution cannot be adjusted by a power grid. Even if some vehicles support the reserved charging, the vehicle controller is in the awakening state when the reserved charging is awakened, and the vehicle controller is also in the awakening state after the charging is finished, so that the electric energy is wasted, and the charging cost is improved.
Disclosure of Invention
In order to solve the problems, the invention provides a charging awakening system and a charging awakening method for an electric vehicle, which realize gun insertion awakening and scheduled awakening, save charging cost and improve customer experience satisfaction.
The invention provides a charging wake-up system of an electric automobile, which comprises:
the connection confirmation module is used for receiving the connection confirmation signal, confirming the connection state of the electric automobile and the power supply equipment and sending the connection confirmation signal;
the first wake-up signal generation module is used for receiving the connection confirmation signal and generating a first wake-up signal so as to trigger the vehicle controller to enter a wake-up state, and when the charging mode is set to be a direct charging mode, the vehicle controller sends a charging signal to control the charging process;
the sleep signal generation module is used for generating a sleep signal to trigger the vehicle controller to enter a sleep state when the current charging mode is set as a reserved charging mode and the reserved wakeup condition is not met or the charging is finished;
and the second wake-up signal generation module is used for receiving the connection confirmation signal, generating a second wake-up signal when the charging mode is set to be the reserved charging mode and the reserved wake-up condition is met, and triggering the vehicle controller to enter a wake-up state and send a charging signal to control the charging process.
Optionally, the connection confirmation module is connected to the CC2 interface and the ADC sampling interface, and includes: the ADC sampling interface is connected with the CC2 interface through the first RC circuit, one end of the fifth resistor is connected with the CC2 interface, and the other end of the fifth resistor is connected with the first power supply.
Optionally, the first RC circuit includes an eleventh resistor, a twelfth resistor, and a fourth capacitor, where one end of the eleventh resistor is connected to the CC2 interface, and the other end of the eleventh resistor is connected to the ADC sampling interface; one end of the twelfth resistor is connected with the ADC sampling interface, and the other end of the twelfth resistor is grounded; the fourth capacitor is connected with the twelfth resistor in parallel.
Optionally, the connection state of the connection confirmation module is determined by judging the voltage collected by the ADC sampling interface.
Optionally, the electric vehicle is connected with the power supply device by inserting a charging gun into a charging interface, and when the charging gun is not inserted into the charging interface, the voltage acquired by the ADC sampling interface is the voltage of the first power supply divided by the fifth resistor, the eleventh resistor, and the twelfth resistor; when the charging gun is inserted into the charging interface, the pull-down resistor of the charging gun is connected into the charging wake-up system and forms voltage division with the fifth resistor, the eleventh resistor and the twelfth resistor of the connection confirmation module, and the voltage acquired by the ADC sampling interface is the voltage of the first power supply divided by the pull-down resistor, the fifth resistor, the eleventh resistor and the twelfth resistor.
Optionally, the first power supply is a battery power supply.
Optionally, the first wake-up signal generating module is connected to the CC2 interface and a wake-up interface of a power chip of the vehicle controller, and includes: a first transistor, a second RC circuit, a first capacitor, a second capacitor and a first diode,
one end of the first capacitor is connected with the CC2 interface, and the other end of the first capacitor is grounded;
the second RC circuit includes: the circuit comprises a sixth resistor, a seventh resistor, an eighth resistor and a second capacitor, wherein the sixth resistor, the seventh resistor and the eighth resistor are connected in series, and the second capacitor is connected with the seventh resistor in parallel;
the first transistor is a PMOS transistor, a gate of the first transistor is connected to the CC2 interface, a source of the first transistor is connected to the first power supply, and a drain of the first transistor is connected to one end of the sixth resistor;
the second transistor comprises an NPN-PNP double-channel triode, wherein the base electrode of the NPN triode is connected between the seventh resistor and the eighth resistor, the emitting electrode of the NPN triode is grounded, the collecting electrode of the NPN triode is connected with the base electrode of the PNP triode, and the emitting electrode of the PNP triode is connected with the first power supply; the collector of PNP triode connects the positive pole of the first diode, the said first diode and power chip of the vehicle controller awaken the interface connection.
Optionally, when the connection is confirmed, the CC2 interface generates a falling edge signal, and the falling edge signal is converted into a rising edge signal through the PMOS transistor.
Optionally, the rising edge signal is converted into a positive pulse signal through the second RC circuit, and a duration of the pulse signal is longer than a filtering time for waking up the power chip.
Optionally, the duration of the positive pulse signal is controlled by controlling a charging time constant of the second capacitor, the charging time constant of the second capacitor being C2 ((R8+ R6)// R7),
wherein, C2 is the capacitance of the second capacitor, R6 is the resistance of the sixth resistor, R7 is the resistance of the seventh resistor, and R8 is the resistance of the eighth resistor.
Optionally, the second wake-up signal generating module is connected to the CAN wake-up interface, and includes: and the anode of the second diode is connected with the CAN awakening interface, and the cathode of the second diode is connected with the cathode of the first diode.
Optionally, the first wake-up signal generating module and the second wake-up signal generating module form an or logic through a first diode and a second diode, and are connected to a wake-up interface of a power chip of the vehicle controller through a third RC circuit.
Optionally, the first diode and the second diode are connected to a wake-up interface of the power chip through a third RC circuit.
Optionally, the third RC circuit includes: one end of the ninth resistor is connected with the cathode of the first diode, and the other end of the ninth resistor is grounded; one end of the tenth resistor is connected with the cathode of the first diode, and the other end of the tenth resistor is connected with the awakening interface of the power chip; and one end of the third capacitor is connected with the awakening interface of the power chip, and the other end of the third capacitor is grounded.
Optionally, the wake-up interface of the power chip of the vehicle controller is a rising edge wake-up interface.
Optionally, the sleep signal generation module is a software-controlled module.
The invention also provides a charging awakening method of the electric automobile, which comprises the following steps:
confirming the connection state of the electric automobile and sending a connection confirmation signal;
generating a first wake-up signal to trigger a vehicle controller to enter a wake-up state;
detecting the charging mode of the current vehicle, and when the charging mode is a direct charging mode, sending a charging signal by a vehicle controller and controlling the charging process;
when the charging mode is a reserved charging mode and does not reach a reserved awakening condition, generating a sleep signal and triggering the vehicle controller to enter a sleep state;
when the charging mode is the reserved charging mode and the reserved awakening condition is met, generating a second awakening signal, triggering the vehicle controller to enter an awakening state and sending a charging signal to control the charging process;
when charging is detected to be completed, a sleep signal is generated to trigger the vehicle controller to enter a sleep state.
In summary, the present invention provides a charging wake-up system and method for an electric vehicle, wherein on the basis of connection confirmation, a first wake-up signal generation module generates a first wake-up signal to implement gun insertion wake-up, when a detection module detects a scheduled wake-up mode, a sleep signal generation module generates a sleep signal to enable a vehicle controller to sleep, and when a scheduled wake-up condition is reached, a second wake-up signal is generated by a second wake-up signal generation module to implement scheduled wake-up. According to the invention, through the design of gun insertion awakening and scheduled awakening, the mode of charging awakening is effectively improved, and the charging is more convenient; the charging opportunity is selectable, the vehicle controller enters a dormant state when charging is reserved, the charging cost is saved, the load of a power grid is reduced, the electric vehicle is more environment-friendly, and the charging efficiency and the customer experience satisfaction degree are effectively improved.
Drawings
FIG. 1 is a topological diagram of a DC charging interface of an electric vehicle;
fig. 2 is a structural diagram of a charging wake-up system of an electric vehicle according to a first embodiment of the present invention;
fig. 3 is a circuit diagram of a charging wake-up system of an electric vehicle according to a first embodiment of the present invention;
fig. 4 is a charging control timing diagram of a charging wake-up system of an electric vehicle according to a first embodiment of the invention;
fig. 5A, fig. 6A, fig. 7A and fig. 8A are simulation circuits of the charge wake-up system according to the second and third embodiments of the present invention;
FIGS. 5B, 6B, 7B and 8B are simulated waveforms of the voltage signals in FIGS. 5A, 6A, 7A and 8A, respectively;
fig. 9 is a flowchart of a charging wake-up method for an electric vehicle according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings in order to make the objects and features of the present invention more comprehensible, however, the present invention may be realized in various forms and should not be limited to the embodiments described above. Furthermore, it will be understood that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer program instructions. It is well known to those skilled in the art that implementation by hardware, by software, and by a combination of software and hardware are equivalent.
Example one
Fig. 2 is a structural diagram of a charging wake-up system of an electric vehicle according to this embodiment. Referring to fig. 2, the present embodiment provides a charging wake-up system for an electric vehicle, including: a connection confirmation module 100, a first wake-up signal generation module 110, a second wake-up signal generation module 120, and a sleep signal generation module 130. The connection confirmation module 100 is configured to confirm a connection state between the electric vehicle and the power supply device, and send a connection confirmation signal; the first wake-up signal generating module 110 is configured to receive the connection confirmation signal and generate a first wake-up signal to trigger the vehicle controller 140 to enter a wake-up state, and when the charging mode is set to the direct charging mode, the vehicle controller 140 sends a charging signal to control the charging process; the sleep signal generation module 130 is configured to generate a sleep signal to trigger the vehicle controller 140 to enter a sleep state when the current charging mode is set as the reserved charging mode and the reserved wakeup condition is not met or the charging is completed; the second wake-up signal generating module 120 is configured to receive the connection confirmation signal, and generate a second wake-up signal to trigger the vehicle controller 140 to enter a wake-up state and send a charging signal to control a charging process when the current charging mode is set as the reserved charging mode and a reserved wake-up condition is met.
Fig. 3 is a circuit diagram of an implementation of the electric vehicle charging wake-up system in this embodiment, as shown in fig. 3, the connection confirmation module 110 is connected to a CC2 interface (CC2PIN) and an ADC sampling interface (ADC sample PIN), and includes: the sampling circuit comprises a first RC circuit, a fifth resistor R5 and a first power supply, wherein the CC2 interface is connected with the ADC sampling interface through the first RC circuit; one end of the fifth resistor R5 is connected with the CC2 interface, and the other end is connected with the first power supply. The first RC circuit comprises an eleventh resistor R11, a twelfth resistor R12 and a fourth capacitor C4, wherein one end of the eleventh resistor R11 is connected with the CC2 interface, and the other end of the eleventh resistor R11 is connected with the ADC sampling interface; one end of the twelfth resistor R12 is connected with the ADC sampling interface, and the other end of the twelfth resistor R12 is grounded; the fourth capacitor C4 is connected in parallel with the twelfth resistor R12. The first power source is a dc power source, such as a battery power source (battery).
The CC2 interface (CC2PIN), i.e. CC2 in fig. 1, corresponds to an interface on the vehicle controller, the connection between the electric vehicle and the power supply device includes that a charging gun is inserted into a charging interface of the electric vehicle, a vehicle plug is connected with a socket, and the like, when an external charging gun is not inserted into the charging interface, the CC2PIN is in a suspended state, and after the gun is inserted, the CC2 interface is connected to the ground through a pull-down resistor R3 in the charging gun. The ADC sampling interface (ADC sample PIN) is an ADC sampling channel of a Micro Control Unit (MCU) of a vehicle controller, and is used for acquiring the connection state of the CC2PIN, the ADC acquires the voltage of a battery (Vbattery) through the voltage division of R5, R12 and R11 when the ADC is not connected, the voltage acquired after connection is the voltage of the battery after the voltage division of the battery by R3, R5, R11 and R12 resistor networks, and the connection state of the CC2 is distinguished by comparing the two voltages.
The first wake-up signal generating module 110 is connected to a connection confirmation interface 2(CC2PIN), and includes: a first transistor Q1, a second transistor Q2, a second RC circuit, a first capacitor C1, and a first diode D1; one end of the first capacitor C1 is connected with the CC2 interface, and the other end is grounded; the RC circuit includes: a sixth resistor R6, a seventh resistor R7, an eighth resistor R8 and a second capacitor C2, wherein the sixth resistor R6, the seventh resistor R7 and the eighth resistor are connected in series with R8, and the second capacitor C2 is connected in parallel with the seventh resistor R7; the first transistor Q1 is a PMOS transistor, the gate of the first transistor Q1 is connected to the CC2 interface, the source of the first transistor Q1 is connected to the first power supply, and the drain of the first transistor Q1 is connected to one end of the sixth resistor R6; the second transistor Q2 includes an NPN-PNP dual-channel transistor, wherein a base of the NPN transistor is connected between the seventh resistor R7 and the eighth resistor R8, an emitter of the NPN transistor is grounded, a collector of the NPN transistor is connected to a base of the PNP transistor, and an emitter of the PNP transistor is connected to the first power supply; the collector of the PNP triode is connected with the anode of a first diode D1, and the first diode D1 is connected with the awakening interface of the power chip of the vehicle controller 140.
The wake-up interface of the power Chip of the vehicle controller 140 is a rising edge wake-up interface (Chip edge wake PIN), that is, when the power Chip is in a sleep state, once the rising edge exceeding a certain voltage threshold and exceeding a certain time exists on the interface, the power Chip is woken up to generate a voltage (e.g., 5V), and then the vehicle controller 140 is woken up. It should be noted that the power down of the vehicle controller is not related to the state of the interface, and the power down of the vehicle controller 140 can be controlled by the sleep signal generation module 130 when the charging is finished, where the sleep signal generation module 130 can be, for example, a software control module, that is, the power down is performed by software.
The second Wake-up signal generating module 120 is connected to a CAN Wake-up interface (CAN Wake), and includes: a second diode D2, an anode of the second diode D2 is connected with the CAN wake-up interface, and a cathode of the second diode D2 is connected with a cathode of the first diode D1.
The CAN Wake-up interface (CAN Wake PIN) is used for an interface of a CAN transceiver for supporting a CAN Wake-up function in a vehicle controller to output signals, the interface is in a suspended state when no CAN Wake-up requirement exists, and the interface outputs high level when the CAN Wake-up requirement exists.
The first diode D1 and the second diode D2 are connected with the power chip wake-up interface through a third RC circuit. The third RC circuit includes: a ninth resistor R9, a tenth resistor R10 and a third capacitor C3, wherein one end of the ninth resistor R9 is connected with the cathode of the first diode D1, and the other end is grounded; one end of the tenth resistor R10 is connected with the cathode of the first diode D1, and the other end of the tenth resistor R10 is connected with the awakening interface of the power chip; one end of the third capacitor C3 is connected with the awakening interface of the power chip, and the other end is grounded. The first wake-up signal generating module 110 and the second wake-up signal generating module 120 form an or logic through a first diode D1 and a second diode D2, and are connected to a wake-up interface of a power Chip (Chip) of the vehicle controller 140. Namely, the vehicle controller 140 can be awakened by the first awakening signal and the second awakening signal, and in the direct awakening mode, the vehicle controller 140 is awakened by the first awakening signal and a charging signal is sent out to control the charging process, so that the gun insertion charging is realized; in the scheduled wake-up mode, the vehicle controller 140 is waken up by the second wake-up signal and sends a charging signal to control the charging process, so as to realize scheduled wake-up charging.
The invention further provides a charging wake-up method for an electric vehicle, as shown in fig. 9, including:
s01: confirming the connection state of the electric automobile and sending a connection confirmation signal;
s02: generating a first wake-up signal to trigger a vehicle controller to enter a wake-up state;
s03: detecting a charging mode of the vehicle, and when the charging mode is a direct charging mode, sending a charging signal to control a charging process by a vehicle controller;
when the charging mode is a reserved charging mode and does not reach a reserved awakening condition, generating a sleep signal and triggering the vehicle controller to enter a sleep state;
s04: when the charging mode is the reserved charging mode and the reserved awakening condition is met, generating a second awakening signal, triggering the vehicle controller to enter an awakening state and sending a charging signal to control the charging process;
s05: and when the charging is finished, generating a sleep signal to trigger the vehicle controller to enter a sleep state.
Fig. 4 is a charging control timing diagram of the charging wake-up system of the electric vehicle according to the present embodiment, and the charging wake-up method of the electric vehicle according to the present embodiment is described below with reference to fig. 3, fig. 4 and fig. 9. First, referring to fig. 3, the electric vehicle charging Wake-up system in this embodiment is implemented by converting a falling edge signal of the CC2PIN into a rising edge through a negative voltage turn-on characteristic of the first transistor Q1, and then generating a high-level pulse at an input terminal of the second transistor Q2 due to a voltage division of the resistors R6 and R8 and a charging of the capacitor C2, but the pulse level is not enough to Wake up the vehicle controller power chip, so that a battery voltage is introduced, and a CAN Wake signal is introduced into the Wake PIN of the power chip through a logic formed by the first diode D1 and the second diode D2, so that when the charging gun is in a plugged-in state, but the vehicle controller is in a sleep state, a scheduled Wake-up CAN Wake-up the vehicle controller through the CAN Wake-up signal inside the vehicle controller.
Specifically, first, the connection state of the electric vehicle is confirmed, and a connection confirmation signal is issued. After the gun is inserted into the charging gun, the connection state of the CC2PIN is collected by the ADC Sample PIN, and after connection confirmation, a confirmation signal is connected.
Then, the first wake-up signal generating module 110 receives the connection confirmation signal, and outputs the first wake-up signal to trigger the vehicle controller 140 to enter a wake-up state, specifically, the CC2PIN is at T0A falling edge signal is generated, the falling edge signal of the CC2PIN is converted to a rising edge by the negative voltage turn-on characteristic of the first transistor Q1, and then due to the voltage division of the resistors R6, R8 and the charging of the capacitor C2, the voltage at T of the second transistor Q2 is caused to rise0Moment on T1Is turned off at time T0To T1The battery voltage (battery) is introduced to generate a pulse level which is enough to wake up the power chip of the vehicle controller, the pulse level is transmitted to the rising edge wake-up interface of the power chip of the vehicle controller through the first diode D1, and the power chip wakes up to wake up the vehicle controller.
Then, checking the charging mode of the vehicle, and when the charging mode is set to be the direct charging mode, sending a charging signal to the awakened vehicle controller to control the charging process, namely realizing the gun insertion charging, which is the same as the prior art and is not shown in fig. 4; when the charging mode is set to the scheduled wake-up mode and the scheduled wake-up condition is not met, the sleep signal generation module 130 sends a sleep signal to the vehicle controller 140, so that the power chip of the vehicle controller 140 is at T2Powering down, i.e., the vehicle controller is in a sleep state during scheduled wake-up.
When the scheduled wake-up condition is met, for example, a certain set time is reached, a second wake-up signal is generated, the vehicle controller 140 is triggered to enter a wake-up state and a charging signal is sent out to control the charging process. Continuing with FIG. 4, at T3The second Wake-up signal generating module 120 outputs a high level to the power chip Wake-up interface through the CAN Wake-up interface, wakes up the power chip to Wake up the vehicle controller, and the vehicle controller wakened up by the second Wake-up signal directly sends a charging signal to control the charging process, so that the scheduled Wake-up is realized.
When the charging is finished, the sleep signal generation module 130 sends a sleep signal to the vehicle controller 140, so that the power chip of the vehicle controller is at T4Vehicle controller 140 auto-enter upon power-off, i.e. charging is completeAnd entering a sleep mode. Then, at T5And the charging gun is pulled out of the charging interface to finish the whole charging process.
Example two
The embodiment provides a rifle of inserting of electric automobile awakens system, and the rifle of inserting awakens to change the mechanical action that charges rifle and insert into finally into a rising edge signal and awaken the power chip promptly to awaken the vehicle controller, make the system get into the flow of charging. Fig. 5A is a simulation circuit of a charge wake-up system, and fig. 5B is a simulation waveform of the voltage signal in fig. 5A. As shown in fig. 5A, the CC2PIN is a resistor R3 (refer to fig. 1) that is pulled down to ground for the vehicle plug, and in order to identify the change of the vehicle connection state, a resistor R5 is required inside the vehicle controller to be pulled up to the battery voltage, so that when the vehicle plug and the vehicle socket are not connected, the level of the vehicle socket end is the battery voltage, and the plug end is a pull-down resistor to ground, and a reasonable R5 resistance value is selected so that when the plug and the socket are connected, the socket end generates a falling edge signal. The power chip needs a rising edge for waking up, and a small-package low-leakage-current first transistor Q1(PMOS) is selected to implement the function of turning the falling edge into the rising edge. In fig. 5A, U1 represents the process of connecting the vehicle plug and socket, the probe V2 detects the level of the CC2 vehicle socket, the probe V1 detects the level of the PMOS output, as shown in fig. 5B, when the charging gun is inserted for 5ms, the level of the CC2 vehicle socket changes from high to low, and the level of the PMOS output changes from low to high, and the rising edge signal is sent to the wake-up port of the power chip, so that the gun-plugging wake-up function is theoretically realized.
EXAMPLE III
The embodiment provides a reservation awakening system of an electric vehicle, wherein the reservation awakening means that the electric vehicle automatically enters a charging state under the condition of manual setting or power grid control, in general, the electric vehicle does not want to be charged immediately when a charging gun is plugged in, the system enters the charging state when a manually set time point is reached or an instruction sent by a charger S + and S-is received, and the electric vehicle is kept dormant in a non-charging time period without generating electric energy waste. However, in the existing electric vehicle charging process, after the gun is plugged, the CC2 interface is always in a connected state, so that the Wake PIN of the power chip is always in a high level state to shield other rising edge Wake-up signals, and once the power is turned off, the vehicle controller always keeps a sleep state unless the charging gun is unplugged again or the controller can be awakened again by an ignition signal. Therefore, the controller is required to be in the wake-up state all the time after the charging gun is plugged in, and a large amount of power consumption is caused in the reservation waiting process. In order to solve the above problem, the scheduled wakeup of the scheduled wakeup system of the electric vehicle provided in this embodiment has two requirements: if a charging reservation request exists after the gun is awakened, controlling the power supply chip to be powered off by software; when the charging time is reached, the whole system is awakened by the CAN.
In order to wake up the power chip by both CC2 and CAN without interfering with each other, the present embodiment uses two diodes (the first diode D1 and the second diode D2) to form an OR logic output to the wake-up interface of the power chip. Fig. 6A is a simulation circuit of another charge wake-up system, and fig. 6B is a simulation waveform of the voltage signal in fig. 6A. As shown in fig. 6A, U1 represents a process of connection of the vehicle to an external power supply, and U2 represents a process of connection of CAN Wake. The first transistor Q1(PMOS) always outputs high level after the charging gun is plugged in, and the state is still maintained even if the power chip is powered down by receiving a sleep signal, so that even if the CAN Wake outputs a rising edge, the Wake-up interface of the power chip cannot respond. Referring to fig. 6B, it CAN be seen that the level of the power chip Wake-up interface generates a rising edge at 5ms, but cannot generate a rising edge signal again at 7ms because the level is already high level, the level at the CC2 interface is detected by the probe V4, the level at the PMOS output is detected by the probe V3, the voltage at the power chip Wake-up interface is detected by the probe V6, and the voltage at the CAN Wake-up interface is detected by the probe V5. That is, the first wake-up signal is triggered by a rising edge, so that short-time triggering can be realized, but when the second wake-up signal is input, the first wake-up signal is always at a high level, so that the rising edge cannot be generated when the second wake-up signal is generated, and the vehicle controller cannot be triggered to enter a wake-up state to control the charging process.
In order to enable the power chip to respond to the CAN wake-up request, after the charging gun is awakened, the voltage before the CC2 signal is transmitted to the diode (D1) is changed into low level, so that the rising edge of CAN wake-up is transmitted to the wake-up interface of the power chip, and the reserved wake-up function is realized. Generally speaking, the rising edge of the output of the PMOS when the gun is inserted is converted into a positive pulse, and it is enough that the duration time of the pulse is longer than the filter time for awakening the power chip. Fig. 7A is a simulation circuit of another charge wake-up system, and fig. 7B is a simulation waveform of the voltage signal in fig. 7A. As shown in fig. 7A, U1 represents the connection process of the vehicle to the external power supply, U2 represents the connection process of the CAN Wake, probe V8 detects the level on the CC2 interface, probe V11 detects the level of the PMOS output, probe V7 detects the level of the first diode anode, probe V10 detects the level of the power chip Wake-up interface, and probe V9 detects the level of the CAN Wake-up. As shown in fig. 7B, at the moment when Q1 is turned on, the voltage on the capacitor C2 cannot suddenly change to 0V, so that a higher voltage level is generated to the power chip wake-up interface, referring to the waveform of V10 at 5ms, and then the capacitor C2 starts to charge with a charging time constant of C2 × (R8+ R6)// R7), and the pulse width is controlled by the charging time constant to realize wake-up.
As shown in fig. 7B, the level transmitted to the power chip wake-up interface during gun insertion is relatively low, and when the battery voltage is relatively low, the wake-up voltage threshold of the power chip may not be reached, so that the signal is used to drive a NPN + PNP dual-channel transistor Q2, and the battery voltage is transmitted to the front end of the first diode D1. Fig. 8A is a simulation circuit of the improved charge wake-up system, and fig. 8B is a simulation waveform of the voltage signal in fig. 8A. As shown in fig. 8A, U1 represents the connection process of the vehicle to the external power supply, U2 represents the connection process of the CAN Wake, probe V13 detects the level on the CC2 interface, probe V12 detects the level on the capacitor C2, probe V14 detects the level on the power chip Wake-up interface, and probe V15 detects the level on the CAN Wake-up interface. Fig. 8B demonstrates the gun insertion wakeup and scheduled wakeup processes, where the gun insertion wakeup is started at 5ms, a pulse with a pulse width of 12ms reaches the wakeup interface of the power chip to wake up the vehicle controller, and then enters a sleep state, and then 25ms later (actual time will be later), the power chip receives the rising edge sent by the CAN wakeup, and the vehicle controller is awakened again, and formally enters a charging process.
In other embodiments of the present invention, similar effects CAN be achieved by changing the way of waking up the CAN as a reserved wake-up way to another way of waking up the CAN by LIN, FlexRAY, ethernet, etc. In addition, the same function can be realized by replacing Q2 with an NPN + PNP double-channel MOS tube and adding an external resistor network. Or the existing button controller chip is used for realizing gun insertion wakeup, then the wakeup signal is pulled down in a mode that the MCU sends out disable signals, and then the power supply chip is awakened again in a mode of CAN and the like, although the integration level is high and the cost is not advantageous, similar functions CAN also be realized.
In summary, the present invention provides a charging wake-up system and method for an electric vehicle, wherein on the basis of connection confirmation, a first wake-up signal generation module generates a first wake-up signal to implement gun insertion wake-up, and in a scheduled wake-up mode, a sleep signal generation module generates a sleep signal to enable a vehicle controller to sleep, and in a scheduled wake-up condition, a second wake-up signal generation module generates a second wake-up signal to implement scheduled wake-up. According to the invention, through the design of gun insertion awakening and scheduled awakening, the mode of charging awakening is effectively improved, and the charging is more convenient; the charging opportunity is selectable, the vehicle controller enters a dormant state when charging is reserved, the charging cost is saved, the load of a power grid is reduced, the electric vehicle is more environment-friendly, and the charging efficiency and the customer experience satisfaction degree are effectively improved.
It should be noted that, in the present specification, all the embodiments are described in a related manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the structural embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (16)
1. A charge wake-up system of an electric vehicle, comprising:
the connection confirmation module is used for confirming the connection state of the electric automobile and the power supply equipment and sending a connection confirmation signal;
the first wake-up signal generation module is used for receiving the connection confirmation signal and generating a first wake-up signal so as to trigger the vehicle controller to enter a wake-up state, and when the charging mode is set to be a direct charging mode, the vehicle controller sends a charging signal to control the charging process;
the sleep signal generation module is used for generating a sleep signal to trigger the vehicle controller to enter a sleep state when the charging mode is set to be the reserved charging mode and the reserved awakening condition is not met or the charging is finished;
and the second wake-up signal generation module is used for receiving the connection confirmation signal, generating a second wake-up signal when the charging mode is set to be the reserved charging mode and the reserved wake-up condition is met, triggering the vehicle controller to enter a wake-up state and sending a charging signal to control the charging process.
2. The charging wake-up system of the electric vehicle according to claim 1, wherein the connection confirmation module is connected to the CC2 interface and the ADC sampling interface, and comprises: the ADC sampling interface is connected with the CC2 interface through the first RC circuit, one end of the fifth resistor is connected with the CC2 interface, and the other end of the fifth resistor is connected with the first power supply.
3. The charging wake-up system of the electric vehicle according to claim 2, wherein the first RC circuit comprises an eleventh resistor, a twelfth resistor and a fourth capacitor, one end of the eleventh resistor is connected to the CC2 interface, and the other end of the eleventh resistor is connected to the ADC sampling interface; one end of the twelfth resistor is connected with the ADC sampling interface, and the other end of the twelfth resistor is grounded; the fourth capacitor is connected with the twelfth resistor in parallel.
4. The charging wake-up system of the electric vehicle according to claim 3, wherein the connection status of the connection confirmation module is determined by judging the voltage collected by the ADC sampling interface.
5. The charging wake-up system of the electric automobile according to claim 4, wherein the electric automobile is connected with the power supply device by inserting a charging gun into a charging interface, and when the charging gun is not inserted into the charging interface, the voltage collected by the ADC sampling interface is the voltage of the first power supply divided by a fifth resistor, an eleventh resistor and a twelfth resistor; when the charging gun is inserted into the charging interface, the pull-down resistor of the charging gun is connected into the charging wake-up system and forms voltage division with the fifth resistor, the eleventh resistor and the twelfth resistor of the connection confirmation module, and the voltage acquired by the ADC sampling interface is the voltage of the first power supply divided by the pull-down resistor, the fifth resistor, the eleventh resistor and the twelfth resistor.
6. The charge wake-up system of an electric vehicle of claim 2, wherein the first power source is a battery power source.
7. The charging wake-up system of an electric vehicle according to claim 2, wherein the first wake-up signal generating module is connected to a CC2 interface and a wake-up interface of a power chip of a vehicle controller, and comprises: a first transistor, a second RC circuit, a first capacitor, a second capacitor and a first diode,
one end of the first capacitor is connected with the CC2 interface, and the other end of the first capacitor is grounded;
the second RC circuit includes: the circuit comprises a sixth resistor, a seventh resistor, an eighth resistor and a second capacitor, wherein the sixth resistor, the seventh resistor and the eighth resistor are connected in series, and the second capacitor is connected with the seventh resistor in parallel;
the first transistor is a PMOS transistor, a gate of the first transistor is connected to the CC2 interface, a source of the first transistor is connected to the first power supply, and a drain of the first transistor is connected to one end of the sixth resistor;
the second transistor comprises an NPN-PNP double-channel triode, wherein the base electrode of the NPN triode is connected between the seventh resistor and the eighth resistor, the emitting electrode of the NPN triode is grounded, the collecting electrode of the NPN triode is connected with the base electrode of the PNP triode, and the emitting electrode of the PNP triode is connected with the first power supply; the collector of the PNP triode is connected with the anode of the first diode;
the first diode is connected with a wake-up interface of a power chip of the vehicle controller.
8. The charging wake-up system of claim 7, wherein the CC2 interface generates a falling edge signal when the connection is confirmed, and the falling edge signal is converted into a rising edge signal through the PMOS transistor.
9. The charging wake-up system of the electric vehicle as claimed in claim 8, wherein the rising edge signal is converted into a positive pulse signal by the second RC circuit, and the duration of the pulse signal is longer than the filtering time for the power chip to wake up.
10. The charging wake-up system of an electric vehicle according to claim 9, wherein the duration of the positive pulse signal is controlled by controlling a charging time constant of the second capacitor, the charging time constant of the second capacitor being C2 ((R8+ R6)/R7),
wherein, C2 is the capacitance of the second capacitor, R6 is the resistance of the sixth resistor, R7 is the resistance of the seventh resistor, and R8 is the resistance of the eighth resistor.
11. The charging wake-up system of an electric vehicle according to claim 7, wherein the second wake-up signal generating module is connected to a CAN wake-up interface, and comprises: and the anode of the second diode is connected with the CAN awakening interface, and the cathode of the second diode is connected with the cathode of the first diode.
12. The charging wake-up system of an electric vehicle according to claim 11, wherein the first wake-up signal generating module and the second wake-up signal generating module form an or logic through a first diode and a second diode, and are connected to a wake-up interface of a power chip of a vehicle controller through a third RC circuit.
13. The charge wakeup system of claim 12, wherein the third RC circuit comprises: one end of the ninth resistor is connected with the cathode of the first diode, and the other end of the ninth resistor is grounded; one end of the tenth resistor is connected with the cathode of the first diode, and the other end of the tenth resistor is connected with the awakening interface of the power chip; and one end of the third capacitor is connected with the awakening interface of the power chip, and the other end of the third capacitor is grounded.
14. The charging wake-up system of an electric vehicle of claim 12, wherein the wake-up interface of the power chip of the vehicle controller is a rising edge wake-up interface.
15. The charging wake-up system of an electric vehicle according to claim 1, wherein the sleep signal generating module is a software-controlled module.
16. A charging wake-up method of an electric vehicle is characterized by comprising the following steps:
confirming the connection state of the electric automobile and sending a connection confirmation signal;
generating a first wake-up signal to trigger a vehicle controller to enter a wake-up state;
detecting the charging mode of the current vehicle, and when the charging mode is a direct charging mode, sending a charging signal by a vehicle controller and controlling the charging process;
when the charging mode is a reserved charging mode and does not reach a reserved awakening condition, generating a sleep signal and triggering the vehicle controller to enter a sleep state;
when the charging mode is the reserved charging mode and the reserved awakening condition is met, generating a second awakening signal, triggering the vehicle controller to enter an awakening state and sending a charging signal to control the charging process;
and when the charging is detected to be finished, generating a dormancy signal, triggering the vehicle controller to enter a dormancy state, and finishing the charging process.
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