CN112224079A - Charging management method and system for pure electric vehicle - Google Patents
Charging management method and system for pure electric vehicle Download PDFInfo
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- CN112224079A CN112224079A CN202010965237.9A CN202010965237A CN112224079A CN 112224079 A CN112224079 A CN 112224079A CN 202010965237 A CN202010965237 A CN 202010965237A CN 112224079 A CN112224079 A CN 112224079A
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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
- B60L53/60—Monitoring or controlling charging stations
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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
- B60L53/30—Constructional details of charging stations
- B60L53/31—Charging columns specially adapted for 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
- 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
- B60L53/60—Monitoring or controlling charging stations
- B60L53/66—Data transfer between charging stations and vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T90/12—Electric charging stations
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a charging management method and a charging management system for a pure electric vehicle, wherein the method comprises the following steps: receiving a first awakening instruction sent by a charging pile by using a vehicle-mounted charger; sending a second awakening instruction to the battery management system, the whole vehicle control unit and the motor control unit by using the vehicle-mounted charger; sending a third awakening instruction to the gateway by using the whole vehicle control unit; sending a fourth awakening instruction to the instrument by using the gateway; when the vehicle control unit receives a high-voltage power-on permission instruction sent by the vehicle-mounted charger, the motor control unit and the battery management system, the vehicle control unit sends a high-voltage power-on instruction to enable the vehicle to enter a charging mode. Therefore, whether the battery is charged slowly or quickly, the battery can be awakened by using the same awakening mechanism so as to charge the vehicle, so that hardware interface resources are saved; in addition, the invention utilizes the cooperation of the hard wire and the CAN bus to transmit the corresponding awakening instruction, thereby further reducing the occupation of hardware interface resources and further reducing the charging management cost.
Description
Technical Field
The invention belongs to the technical field of electric vehicle charging, and particularly relates to a charging management method and system for a pure electric vehicle.
Background
The controller awakening and sleeping mechanism influences the charging efficiency and the charging safety in the charging process of the pure electric vehicle. The awakening mechanism in the charging process comprises: a component that needs to wake up, a wake up mode, etc. The awakening mode mainly comprises a hard wire awakening mode and a CAN awakening mode.
Because the charging mode of the pure electric vehicle comprises fast charging and slow charging, in the prior art, when the pure electric vehicle is subjected to charging Management, one mode is to adopt different wake-up modes for the slow charging and the fast charging processes, two control hardware interface resources need to be designed for a vehicle-mounted Charger (OBC, On-board Charger) and a Battery Management System (BMS) to respectively correspond to the fast charging and the slow charging, so that the hardware interface resources occupy too much; the other method is to adopt a hard-line wake-up mode for both slow charging and fast charging, but when all the methods adopt the hard-line wake-up mode, more hardware interface resources are occupied, and therefore the overall charging management cost is increased.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a charging management method and a charging management system for a pure electric vehicle, which are used for solving the technical problem that when the pure electric vehicle is charged in the prior art, the cost of charging management is increased due to more occupied hardware interface resources caused by an awakening mechanism.
The invention provides a charging management method of a pure electric vehicle, which comprises the following steps:
when the charging gun is detected to be inserted into a charging port of a vehicle, a first awakening instruction sent by a charging pile is received by using a vehicle-mounted charger; fill electric pile includes: slowly filling or quickly filling piles;
when the vehicle-mounted charger is in an awakening state, the vehicle-mounted charger is used for sending a second awakening instruction to a battery management system, a whole vehicle control unit and a motor control unit; the first awakening instruction and the second awakening instruction are transmitted through a hard wire;
when the whole vehicle control unit is in an awakening state, sending a third awakening instruction to a gateway by using the whole vehicle control unit;
when the gateway is in an awakening state, sending a fourth awakening instruction to the instrument by using the gateway; the third wake-up instruction and the fourth wake-up instruction are transmitted through a CAN bus;
when the vehicle control unit receives high-voltage power-on permission instructions respectively sent by the vehicle-mounted charger, the motor control unit and the battery management system, the vehicle control unit sends a high-voltage power-on instruction to enable the vehicle to enter a charging mode.
Optionally, the method further includes:
when the fact that the vehicle meets the charging stopping condition is detected by the whole vehicle control unit, whether the temperature of a battery pack of the vehicle is within a preset temperature range is judged;
if the temperature of the battery pack is determined to be within the preset temperature range, sending an instruction for controlling the disconnection of a high-voltage loop by using the whole vehicle control unit;
and when the high-voltage loop is determined to be in a disconnected state, sending a sleep instruction by using the whole vehicle control unit.
Optionally, the method further includes:
when the vehicle-mounted charger determines that the high-voltage loop is in a disconnected state and detects that the vehicle meets the condition of stopping charging and receives the sleep instruction, the vehicle-mounted charger enters a sleep state; when the vehicle-mounted charger enters a sleep state, stopping sending the second awakening instruction;
and when the whole vehicle control unit detects that the high-voltage loop is in a disconnected state and the second awakening instruction is lost, the whole vehicle control unit enters a dormant state.
Optionally, the method further includes:
and when the motor control unit detects that the second awakening instruction is lost and receives the sleeping instruction, the motor control unit enters a sleeping state.
Optionally, the method further includes:
and entering a dormant state when the battery management system detects that the vehicle meets the condition of stopping charging, determines that the high-voltage loop is in a disconnected state, receives the dormant instruction and detects that the vehicle meets the condition of stopping charging.
Optionally, the time length from the state of being in the awakening state to the time of sending the second awakening instruction by the vehicle-mounted charger is less than a preset first time length; the time length from the state of awakening to the time of sending the corresponding high-voltage electrifying permission instruction by the vehicle-mounted charger is less than a preset second time length;
the time from the state of awakening to the time of sending the corresponding high-voltage electrifying permission instruction by the motor control unit is shorter than a preset third time;
the time length of the battery management system for sending the corresponding high-voltage power-on allowing instruction from the received second awakening instruction is less than a preset fourth time length;
and the time from the receiving of the second awakening instruction to the sending of the corresponding high-voltage electrifying permission instruction by the whole vehicle control unit is less than a preset fifth time.
Optionally, when the charging pile is a slow charging pile, the method further includes:
when the temperature of the battery pack is determined to exceed the preset temperature range, sending a high-voltage power-on disconnection instruction by using the whole vehicle control unit, and sending a delayed dormancy instruction to a vehicle-mounted charger, the motor control unit and the battery management system; determining a cooling power based on a current temperature of the battery pack;
converting the cooling power to charging power with the battery management system;
based on the charging power, sending a charging request to the charging pile by using the vehicle-mounted charger so as to enable the charging pile to provide electric energy for a cooling system;
and cooling the battery pack based on the cooling system.
Optionally, when the charging pile is a quick charging pile, the method further includes:
when the temperature of the battery pack is determined to exceed the preset temperature range, sending a high-voltage power-on disconnection instruction by using the whole vehicle control unit, and sending a delayed dormancy instruction to a vehicle-mounted charger, the motor control unit and the battery management system; determining a cooling power based on a current temperature of the battery pack;
converting the cooling power into charging power by using the battery management system, and providing electric energy for a cooling system based on the charging power;
and cooling the battery pack based on the cooling system.
The invention also provides a charging management system of the pure electric vehicle, which comprises the following components: the vehicle-mounted battery management system comprises a vehicle-mounted charger, a battery management system, a whole vehicle control unit and a motor control unit; wherein the content of the first and second substances,
the vehicle-mounted charger is used for receiving a first awakening instruction sent by the charging pile when the charging gun is detected to be inserted into a charging port of a vehicle; fill electric pile includes: slowly filling or quickly filling piles; when the vehicle is in the awakening state, sending the second awakening instruction to a battery management system, a vehicle control unit and a motor control unit; the first awakening instruction and the second awakening instruction are transmitted through a hard wire;
the vehicle control unit is used for sending a third awakening instruction to the gateway when the vehicle control unit is in the awakening state;
the gateway is used for sending a fourth wake-up instruction to the instrument when the gateway is in the wake-up state; the third wake-up instruction and the fourth wake-up instruction are transmitted through a CAN bus;
the vehicle control unit is further configured to send a high-voltage power-on instruction when receiving high-voltage power-on permission instructions respectively sent by the vehicle-mounted charger, the motor control unit and the battery management system, so that the vehicle enters a charging mode.
Optionally, the vehicle control unit is further configured to:
when the fact that the vehicle meets the condition of stopping charging is detected, whether the temperature of a battery pack of the vehicle is within a preset temperature range is judged;
if the temperature of the battery pack is determined to be within the preset temperature range, sending a command for controlling the high-voltage loop to be disconnected;
and sending a sleep command when the high-voltage loop is determined to be in the disconnected state.
The invention provides a charging management method and a charging management system for a pure electric vehicle, wherein the method comprises the following steps: when the charging gun is detected to be inserted into a charging port of a vehicle, a first awakening instruction sent by a charging pile is received by using a vehicle-mounted charger; fill electric pile includes: slowly filling or quickly filling piles; when the vehicle-mounted charger is in an awakening state, the vehicle-mounted charger is used for sending a second awakening instruction to a battery management system, a whole vehicle control unit and a motor control unit; the first awakening instruction and the second awakening instruction are transmitted through a hard wire; when the whole vehicle control unit is in an awakening state, sending a third awakening instruction to a gateway by using the whole vehicle control unit; when the gateway is in an awakening state, sending a fourth awakening instruction to the instrument by using the gateway; the third wake-up instruction and the fourth wake-up instruction are transmitted through a CAN bus; when the vehicle control unit receives high-voltage power-on permission instructions respectively sent by the vehicle-mounted charger, the motor control unit and the battery management system, the vehicle control unit sends a high-voltage power-on instruction to enable the vehicle to enter a charging mode. Therefore, whether slow charging or fast charging is carried out, the vehicle-mounted charger, the battery management system, the whole vehicle control unit and the motor control unit can be awakened by using the same awakening mechanism, so that the vehicle is charged, and hardware interface resources are saved; in addition, the invention utilizes the cooperation of the hard wire and the CAN bus to transmit the corresponding awakening instruction, thereby further reducing the occupation of hardware interface resources and further reducing the charging management cost.
Drawings
Fig. 1 is a schematic flow chart of a charging management method for a pure electric vehicle according to an embodiment of the present invention;
fig. 2 is a timing diagram illustrating a wakeup process of each controller in the charging process according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a charging management system of a pure electric vehicle according to an embodiment of the present invention.
Detailed Description
The invention provides a charging management method and system for a pure electric vehicle, and aims to solve the technical problem that when the pure electric vehicle is charged in the prior art, the cost of charging management is increased due to the fact that a wakeup mechanism occupies more hardware interface resources.
The technical solution of the present invention is further described in detail by the accompanying drawings and the specific embodiments.
Example one
The embodiment provides a charging management method for a pure electric vehicle, as shown in fig. 1, the method includes:
s110, when the charging gun is detected to be inserted into a charging port of a vehicle, a first awakening instruction sent by a charging pile is received by a vehicle-mounted charger; fill electric pile includes: slowly filling or quickly filling piles;
here, the charging mode of the pure electric vehicle includes slow charging and fast charging, and in order to reduce the occupation of the hardware resource interface, the same wake-up mechanism may be used for the wake-up mechanisms of the slow charging and the fast charging.
Specifically, when the charging gun is detected to be inserted into a charging port of a vehicle, a first awakening instruction sent by the charging pile is received by using an OBC (on-board battery charger); fill electric pile includes: and (4) slow filling piles or quick filling piles. Wherein the first wake-up command is transmitted via a hard wire.
S111, when the vehicle-mounted charger is in an awakening state, the vehicle-mounted charger is used for sending a second awakening instruction to a battery management system, a whole vehicle control unit and a motor control unit; the first awakening instruction and the second awakening instruction are transmitted through a hard wire;
when the vehicle-mounted charger is in an awakening state (after being awakened), the vehicle-mounted charger is used for simultaneously sending a second awakening instruction to the battery management system, the whole vehicle control unit and the motor control unit; the second wake-up command is also transmitted via hard-wire.
Therefore, the main controllers (the vehicle-mounted charger, the battery management system, the whole vehicle control unit and the motor control unit) participating in high-voltage connection send the awakening instruction by adopting hard wires, so that the awakening time of each controller can be reduced, and the charging efficiency is improved.
S112, when the whole vehicle control unit is in an awakening state, sending a third awakening instruction to a gateway by using the whole vehicle control unit;
when the whole vehicle control unit is in an awakening state, sending a third awakening instruction to the gateway by using the whole vehicle control unit; the third wake-up command is transmitted through the CAN bus.
S113, when the gateway is in an awakening state, sending a fourth awakening instruction to the instrument by using the gateway; the third wake-up instruction and the fourth wake-up instruction are transmitted through a CAN bus;
when the gateway is in the awakening state, sending a fourth awakening instruction to the instrument by using the gateway; the fourth wake-up command is transmitted through the CAN bus. Therefore, non-key components such as the gateway and the instrument are awakened by the CAN bus, and occupation of hardware interface resources CAN be reduced.
And S114, when the vehicle control unit receives high-voltage electrifying permission instructions respectively sent by the vehicle-mounted charger, the motor control unit and the battery management system, sending a high-voltage electrifying instruction to enable the vehicle to enter a charging mode.
After the vehicle-mounted charger, the battery management system, the whole vehicle control unit and the motor control unit are awakened, the vehicle-mounted charger, the battery management system, the whole vehicle control unit and the motor control unit enter a self-checking state to judge whether the vehicle-mounted charger, the battery management system, the whole vehicle control unit and the motor control unit allow high voltage supply or not, and if the vehicle-mounted charger, the battery management system and the motor control unit allow high voltage supply, the vehicle-mounted charger, the battery management system and the motor control unit respectively send high voltage supply allowing; when the vehicle control unit receives high-voltage electrifying permission instructions respectively sent by the vehicle-mounted charger, the motor control unit and the battery management system, the vehicle control unit sends the high-voltage electrifying instructions to close the high-voltage loop, so that the vehicle enters a charging mode.
As an optional embodiment, in order to avoid charging failure or charging delay and other faults caused by time sequence disorder and improve charging efficiency, referring to fig. 2, the implementation further sets a wakeup time sequence of a vehicle-mounted charger, a motor control unit, a battery management system and a vehicle control unit, specifically:
after the vehicle-mounted charger is awakened from the gun insertion, the time length from the state of awakening to the sending of a second awakening instruction (awakening output) by the vehicle-mounted charger is less than a preset first time length t 1; the time length from the state of awakening to the state of sending the corresponding high-voltage electrifying permission instruction by the vehicle-mounted charger is less than a preset second time length t 2; wherein t1 is less than 100ms, and t2 is less than 300 ms.
The time length from the state of awakening to the time when the corresponding high-voltage electrifying permission instruction is sent by the motor control unit is less than a preset third time length t3, wherein t3 is less than 210 ms;
the time length of the battery management system for sending the corresponding high-voltage power-on allowing instruction after receiving the second awakening instruction is less than a preset fourth time length t4, wherein t4 is less than 600 ms;
and the time length from the time when the whole vehicle control unit receives the second awakening instruction to the time when the corresponding high-voltage electrifying permission instruction is sent is less than a preset fifth time length t5, wherein t5 is less than 1000 ms.
As an alternative embodiment, the method further comprises:
when the vehicle control unit detects that the vehicle meets the condition of stopping charging, judging whether the temperature of a battery pack of the vehicle is within a preset temperature range; the condition for stopping charging may include: the charging gun pulls out the gun or the vehicle-mounted charger, the battery management system, the whole vehicle control unit and the motor control unit are in failure, and the like; the preset temperature range can be 0-45 ℃, and preferably 30 ℃;
if the temperature of the battery pack is determined to be within a preset temperature range, sending an instruction for controlling the high-voltage loop to be disconnected by using the whole vehicle control unit so as to disconnect the high-voltage loop;
and when the high-voltage loop is determined to be in the disconnected state, sending a sleep instruction by using the whole vehicle control unit.
When the vehicle-mounted charger determines that the high-voltage loop is in a disconnected state and detects that the vehicle meets the condition of stopping charging and receives a sleep instruction, entering a sleep state; when the vehicle-mounted charger enters a dormant state, stopping sending a second awakening instruction;
and when the whole vehicle control unit detects that the high-voltage loop is determined to be in the disconnected state and the second awakening instruction is determined to be lost, the whole vehicle control unit enters the dormant state.
And when the motor control unit detects that the second awakening instruction is lost and receives the sleeping instruction, the motor control unit enters a sleeping state.
And entering a dormant state when the battery management system detects that the vehicle meets the charging stopping condition, determines that the high-voltage loop is in a disconnected state, receives a dormant instruction and detects that the vehicle meets the charging stopping condition.
As an alternative embodiment, when the charging pile is a slow charging pile, the method further comprises:
when the temperature of the battery pack is determined to exceed a preset temperature range, a whole vehicle control unit is used for sending a high-voltage power-on disconnection instruction, and a delayed dormancy instruction is sent to a vehicle-mounted charger, a motor control unit and a battery management system; determining a cooling power based on a current temperature of the battery pack;
converting the cooling power into charging power by using the battery management system, and sending a charging request to a charging pile based on the charging power so as to enable the charging pile to provide electric energy for the cooling system;
cooling the battery pack based on a cooling system;
and entering a dormancy process when the temperature reaches a preset temperature range.
Specifically, the whole vehicle control unit determines cooling power based on the current temperature of the battery pack and sends the cooling power to the battery management system, the battery management system converts the cooling power into charging power and sends the charging power to the vehicle-mounted charger, and the vehicle-mounted charger sends a charging request to the charging pile based on the charging power so that the charging pile can provide electric energy for the cooling system. Like this, the used electric energy of cooling is provided by filling electric pile, does not consume the electric energy in the battery package.
As an optional embodiment, when the charging pile is a quick charging pile, the method further includes:
when the temperature of the battery pack is determined to exceed the preset temperature range, sending a high-voltage power-on disconnection instruction by using a whole vehicle control unit, and sending a delayed dormancy instruction to a vehicle-mounted charger, a motor control unit and a battery management system; determining a cooling power based on a current temperature of the battery pack;
converting the cooling power into charging power by using a battery management system, wherein the battery management system provides electric energy for the cooling system based on the charging power;
cooling the battery pack based on a cooling system;
and entering a dormancy process when the temperature reaches a preset temperature range.
Here, the cooling system includes: if the temperature of the battery pack is detected to be overhigh, the whole vehicle control unit can control the rotating speed of the water pump and the fan and increase the heat dissipation capacity; or the compressor is controlled to work, the refrigerating capacity is increased, and the temperature of the battery pack is reduced.
In the invention, no matter slow charging or fast charging is carried out, the same awakening mechanism can be used for awakening the vehicle-mounted charger, the battery management system, the whole vehicle control unit and the motor control unit so as to charge the vehicle, thus simplifying the awakening structure and saving hardware interface resources and vehicle body space; in addition, the invention utilizes the cooperation of the hard wire and the CAN bus to transmit the corresponding awakening instruction, thereby further reducing the occupation of hardware interface resources and further reducing the charging management cost. And the sleep strategy detects whether the corresponding wake-up command is lost or not and also adds conditions of judging whether the high-voltage loop is disconnected or not, whether charging is stopped or not and the like, so that the phenomena of unexpected charging stop are avoided, and the charging efficiency is improved.
Based on the same inventive concept, the invention further provides a charging management system of the pure electric vehicle, which is detailed in embodiment two.
Example two
The present embodiment provides a charging management system for a pure electric vehicle, as shown in fig. 3, the system includes: the system comprises a vehicle-mounted charger 1, a battery management system 2, a whole vehicle control unit 3 and a motor control unit 4;
the vehicle-mounted charger 1 is used for receiving a first awakening instruction sent by the charging pile when the charging gun is detected to be inserted into a charging port of a vehicle; fill electric pile includes: a slow filling pile 5 or a fast filling pile 6; when the vehicle is in the awakening state, sending a second awakening instruction to the battery management system 2, the vehicle control unit 3 and the motor control unit 4; the first awakening instruction and the second awakening instruction are transmitted through a hard wire;
the vehicle control unit 3 is used for sending a third wake-up instruction to the gateway 7 when the vehicle control unit is in the wake-up state;
the gateway 7 is used for sending a fourth wake-up instruction to the instrument 8 when the gateway is in the wake-up state; the third awakening instruction and the fourth awakening instruction are transmitted through a CAN bus;
the vehicle control unit 3 is further configured to send a high-voltage power-on instruction when receiving the high-voltage power-on permission instruction sent by the vehicle-mounted charger 1, the motor control unit 4, and the battery management system 2, respectively, so that the vehicle enters a charging mode.
Specifically, the charging mode of the pure electric vehicle includes slow charging and fast charging, and in order to reduce the occupation of the hardware resource interface, the wake-up mechanisms of the slow charging and the fast charging may use the same wake-up mechanism.
Specifically, when the charging gun is detected to be inserted into a charging port of a vehicle, the vehicle-mounted charger 1 receives a first awakening instruction sent by the charging pile; wherein the first wake-up command is transmitted via a hard wire.
When the vehicle-mounted charger is in an awakening state (after being awakened), the vehicle-mounted charger simultaneously sends a second awakening instruction to the battery management system 2, the whole vehicle control unit 3 and the motor control unit 4; the second wake-up command is also transmitted via hard-wire.
Therefore, the main controllers (the vehicle-mounted charger 1, the battery management system 2, the whole vehicle control unit 3 and the motor control unit 4) participating in high-voltage connection send the awakening instruction by adopting hard wires, so that the awakening time of each controller can be reduced, and the charging efficiency is improved.
When the vehicle control unit 3 is in the wake-up state, the vehicle control unit is configured to send a third wake-up instruction to the gateway 7; the third wake-up command is transmitted through the CAN bus.
When the gateway 7 is in the awakening state, sending a fourth awakening instruction to the instrument 8 by using the gateway 7; the fourth wake-up command is transmitted through the CAN bus. Therefore, non-critical components such as the gateway 7, the instrument 8 and the like are awakened by the CAN bus, and occupation of hardware interface resources CAN be reduced.
After the vehicle-mounted charger 1, the battery management system 2, the whole vehicle control unit 3 and the motor control unit 4 are awakened, the vehicle-mounted charger 1, the battery management system 2, the whole vehicle control unit 3 and the motor control unit 4 enter a self-checking state to judge whether the vehicle-mounted charger 1, the battery management system 2, the whole vehicle control unit 3 and the motor control unit 4 allow high voltage supply, and if the vehicle-mounted charger 1, the battery management system 2 and the motor control unit 4 allow high voltage supply, the vehicle-mounted charger 1, the battery management system 2 and the motor control unit 4 respectively send high voltage; when the vehicle control unit 3 receives high-voltage power-on permission instructions respectively sent by the vehicle-mounted charger 1, the motor control unit 4 and the battery management system 2, the vehicle control unit sends a high-voltage power-on instruction, closes a high-voltage loop and enables the vehicle to enter a charging mode.
As an optional embodiment, in order to avoid charging failure or charging delay and other faults caused by time sequence disorder and improve charging efficiency, referring to fig. 2, the implementation further sets wakeup time sequences of a vehicle-mounted charger 1, a motor control unit 4, a battery management system 2 and a vehicle control unit 3, specifically:
after the vehicle-mounted charger is awakened from the gun insertion, the time length from the awakening state of the vehicle-mounted charger to the sending of the second awakening instruction is shorter than a preset first time length t 1; the time length from the state of awakening to the state of sending the corresponding high-voltage electrifying permission instruction by the vehicle-mounted charger is less than a preset second time length t 2; wherein t1 is less than 100ms, and t2 is less than 300 ms.
The time length from the state of awakening to the time when the corresponding high-voltage electrifying permission instruction is sent by the motor control unit is less than a preset third time length t3, wherein t3 is less than 210 ms;
the time length of the battery management system for sending the corresponding high-voltage power-on allowing instruction after receiving the second awakening instruction is less than a preset fourth time length t4, wherein t4 is less than 600 ms;
and the time length from the time when the whole vehicle control unit receives the second awakening instruction to the time when the corresponding high-voltage electrifying permission instruction is sent is less than a preset fifth time length t5, wherein t5 is less than 1000 ms.
As an alternative embodiment, when the vehicle control unit 3 detects that the vehicle meets the condition of stopping charging, it is further configured to: judging whether the temperature of a battery pack of the vehicle is within a preset temperature range or not; the condition for stopping charging may include: the charging gun is pulled out or the vehicle-mounted charger 1, the battery management system 2, the whole vehicle control unit 3 and the motor control unit 4 are in fault, and the like; the preset temperature range can be 0-45 ℃, and preferably 30 ℃;
if the temperature of the battery pack is determined to be within the preset temperature range, the whole vehicle control unit 3 sends an instruction for controlling the high-voltage loop to be disconnected so as to disconnect the high-voltage loop;
when the high-voltage loop is determined to be in the off state, the whole vehicle control unit 3 sends a sleep instruction.
When the vehicle-mounted charger 1 determines that the high-voltage loop is in a disconnected state and detects that the vehicle meets the condition of stopping charging and receives a sleep instruction, the vehicle-mounted charger enters a sleep state; when the vehicle-mounted charger 1 enters a sleep state, stopping sending a second awakening instruction;
and when the vehicle control unit 3 detects that the high-voltage loop is in the disconnected state and the second wake-up instruction is lost, the vehicle enters the dormant state.
And when the motor control unit 4 detects that the second wake-up instruction is lost and receives the sleep instruction, entering a sleep state.
The sleep state is entered when the battery management system 2 detects that the vehicle satisfies the condition for stopping charging, determines that the high-voltage circuit is in the off state, receives the sleep instruction, and detects that the vehicle satisfies the condition for stopping charging.
When it is determined that the temperature of the battery pack exceeds the preset temperature range, the vehicle control unit 3 is further configured to: sending a high-voltage power-on disconnection instruction, and sending a delayed dormancy instruction to the vehicle-mounted charger 1, the motor control unit 4 and the battery management system 2; determining a cooling power based on a current temperature of the battery pack;
the battery management system 2 converts the cooling power into charging power, and sends a charging request to the charging pile based on the charging power so that the charging pile can provide electric energy for the cooling system;
cooling the battery pack based on a cooling system;
and entering a dormancy process when the temperature reaches a preset temperature range.
Specifically, the vehicle control unit 3 determines cooling power based on the current temperature of the battery pack, and sends the cooling power to the battery management system 2, the battery management system 2 converts the cooling power into charging power, and sends the charging power to the vehicle-mounted charger 1, and the vehicle-mounted charger 1 sends a charging request to the charging pile based on the charging power, so that the charging pile can provide electric energy for the cooling system. Like this, the used electric energy of cooling is provided by filling electric pile, does not consume the electric energy in the battery package.
As an optional embodiment, when the charging pile is a quick charging pile, the vehicle control unit 3 is further configured to:
when the temperature of the battery pack is determined to exceed the preset temperature range, sending a high-voltage power-on disconnection instruction, and sending a sleep delay instruction to the vehicle-mounted charger 1, the motor control unit 4 and the battery management system 2; determining a cooling power based on a current temperature of the battery pack;
the battery management system 2 converts the cooling power into charging power, and the battery management system 2 provides electric energy for the cooling system based on the charging power;
cooling the battery pack based on a cooling system;
and entering a dormancy process when the temperature reaches a preset temperature range.
Here, the cooling system includes: if the temperature of the battery pack is detected to be overhigh, the whole vehicle control unit can control the rotating speed of the water pump and the fan and increase the heat dissipation capacity; or the compressor is controlled to work, the refrigerating capacity is increased, and the temperature of the battery pack is reduced.
In the invention, no matter slow charging or fast charging is carried out, the same awakening mechanism can be used for awakening the vehicle-mounted charger, the battery management system, the whole vehicle control unit and the motor control unit so as to charge the vehicle, thus simplifying the awakening structure and saving hardware interface resources and vehicle body space; in addition, the invention utilizes the cooperation of the hard wire and the CAN bus to transmit the corresponding awakening instruction, thereby further reducing the occupation of hardware interface resources and further reducing the charging management cost. And the sleep strategy detects whether the corresponding wake-up command is lost or not and also adds conditions of judging whether the high-voltage loop is disconnected or not, whether charging is stopped or not and the like, so that the phenomena of unexpected charging stop are avoided, and the charging efficiency is improved.
The charging management method and the charging management system for the pure electric vehicle provided by the invention have the beneficial effects that at least:
the invention provides a charging management method and a charging management system for a pure electric vehicle, wherein the method comprises the following steps: when the charging gun is detected to be inserted into a charging port of a vehicle, a first awakening instruction sent by a charging pile is received by using a vehicle-mounted charger; fill electric pile includes: slowly filling or quickly filling piles; when the vehicle-mounted charger is in an awakening state, the vehicle-mounted charger is used for sending a second awakening instruction to a battery management system, a whole vehicle control unit and a motor control unit; the first awakening instruction and the second awakening instruction are transmitted through a hard wire; when the whole vehicle control unit is in an awakening state, sending a third awakening instruction to a gateway by using the whole vehicle control unit; when the gateway is in an awakening state, sending a fourth awakening instruction to the instrument by using the gateway; the third wake-up instruction and the fourth wake-up instruction are transmitted through a CAN bus; when the vehicle control unit receives high-voltage power-on permission instructions respectively sent by the vehicle-mounted charger, the motor control unit and the battery management system, the vehicle control unit sends a high-voltage power-on instruction to enable the vehicle to enter a charging mode. Therefore, whether slow charging or fast charging is carried out, the vehicle-mounted charger, the battery management system, the whole vehicle control unit and the motor control unit can be awakened by using the same awakening mechanism, so that the vehicle is charged, and hardware interface resources are saved; in addition, the corresponding wake-up instruction is transmitted by matching the hard wire and the CAN bus, so that the occupation of hardware interface resources is further reduced, and the charging management cost is further reduced; and the sleep strategy detects whether the corresponding wake-up command is lost or not and also adds conditions of judging whether the high-voltage loop is disconnected or not, whether charging is stopped or not and the like, so that the phenomena of unexpected charging stop are avoided, and the charging efficiency is improved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (10)
1. A charging management method of a pure electric vehicle is characterized by comprising the following steps:
when the charging gun is detected to be inserted into a charging port of a vehicle, a first awakening instruction sent by a charging pile is received by using a vehicle-mounted charger; fill electric pile includes: slowly filling or quickly filling piles;
when the vehicle-mounted charger is in an awakening state, the vehicle-mounted charger is used for sending a second awakening instruction to a battery management system, a whole vehicle control unit and a motor control unit; the first awakening instruction and the second awakening instruction are transmitted through a hard wire;
when the whole vehicle control unit is in an awakening state, sending a third awakening instruction to a gateway by using the whole vehicle control unit;
when the gateway is in an awakening state, sending a fourth awakening instruction to the instrument by using the gateway; the third wake-up instruction and the fourth wake-up instruction are transmitted through a CAN bus;
when the vehicle control unit receives high-voltage power-on permission instructions respectively sent by the vehicle-mounted charger, the motor control unit and the battery management system, the vehicle control unit sends a high-voltage power-on instruction to enable the vehicle to enter a charging mode.
2. The method of claim 1, wherein the method further comprises:
when the fact that the vehicle meets the charging stopping condition is detected by the whole vehicle control unit, whether the temperature of a battery pack of the vehicle is within a preset temperature range is judged;
if the temperature of the battery pack is determined to be within the preset temperature range, sending an instruction for controlling the disconnection of a high-voltage loop by using the whole vehicle control unit;
and when the high-voltage loop is determined to be in a disconnected state, sending a sleep instruction by using the whole vehicle control unit.
3. The method of claim 2, wherein the method further comprises:
when the vehicle-mounted charger determines that the high-voltage loop is in a disconnected state and detects that the vehicle meets the condition of stopping charging and receives the sleep instruction, the vehicle-mounted charger enters a sleep state; when the vehicle-mounted charger enters a sleep state, stopping sending the second awakening instruction;
and when the whole vehicle control unit detects that the high-voltage loop is in a disconnected state and the second awakening instruction is lost, the whole vehicle control unit enters a dormant state.
4. The method of claim 3, wherein the method further comprises:
and when the motor control unit detects that the second awakening instruction is lost and receives the sleeping instruction, the motor control unit enters a sleeping state.
5. The method of claim 3, wherein the method further comprises:
and entering a dormant state when the battery management system detects that the vehicle meets the condition of stopping charging, determines that the high-voltage loop is in a disconnected state, receives the dormant instruction and detects that the vehicle meets the condition of stopping charging.
6. The method according to claim 1, characterized in that the time length from the time when the vehicle-mounted charger is in the wake-up state to the time when the vehicle-mounted charger sends the second wake-up instruction is less than a preset first time length; the time length from the state of awakening to the time of sending the corresponding high-voltage electrifying permission instruction by the vehicle-mounted charger is less than a preset second time length;
the time from the state of awakening to the time of sending the corresponding high-voltage electrifying permission instruction by the motor control unit is shorter than a preset third time;
the time length of the battery management system for sending the corresponding high-voltage power-on allowing instruction from the received second awakening instruction is less than a preset fourth time length;
and the time from the receiving of the second awakening instruction to the sending of the corresponding high-voltage electrifying permission instruction by the whole vehicle control unit is less than a preset fifth time.
7. The method of claim 2, wherein when the charging post is a slow charging post, the method further comprises:
when the temperature of the battery pack is determined to exceed the preset temperature range, sending a high-voltage power-on disconnection instruction by using the whole vehicle control unit, and sending a delayed dormancy instruction to a vehicle-mounted charger, the motor control unit and the battery management system; determining a cooling power based on a current temperature of the battery pack;
converting the cooling power to charging power with the battery management system;
based on the charging power, sending a charging request to the charging pile by using the vehicle-mounted charger so as to enable the charging pile to provide electric energy for a cooling system;
and cooling the battery pack based on the cooling system.
8. The method of claim 2, wherein when the charging post is a quick charging post, the method further comprises:
when the temperature of the battery pack is determined to exceed the preset temperature range, sending a high-voltage power-on disconnection instruction by using the whole vehicle control unit, and sending a delayed dormancy instruction to a vehicle-mounted charger, the motor control unit and the battery management system; determining a cooling power based on a current temperature of the battery pack;
converting the cooling power into charging power by using the battery management system, and providing electric energy for a cooling system based on the charging power;
and cooling the battery pack based on the cooling system.
9. A charging management system of a pure electric vehicle, the system comprising: the vehicle-mounted battery management system comprises a vehicle-mounted charger, a battery management system, a whole vehicle control unit and a motor control unit; wherein the content of the first and second substances,
the vehicle-mounted charger is used for receiving a first awakening instruction sent by the charging pile when the charging gun is detected to be inserted into a charging port of a vehicle; fill electric pile includes: slowly filling or quickly filling piles; when the vehicle is in the awakening state, sending the second awakening instruction to a battery management system, a vehicle control unit and a motor control unit; the first awakening instruction and the second awakening instruction are transmitted through a hard wire;
the vehicle control unit is used for sending a third awakening instruction to the gateway when the vehicle control unit is in the awakening state;
the gateway is used for sending a fourth wake-up instruction to the instrument when the gateway is in the wake-up state; the third wake-up instruction and the fourth wake-up instruction are transmitted through a CAN bus;
the vehicle control unit is further configured to send a high-voltage power-on instruction when receiving high-voltage power-on permission instructions respectively sent by the vehicle-mounted charger, the motor control unit and the battery management system, so that the vehicle enters a charging mode.
10. The system of claim 9, wherein the vehicle control unit is further configured to:
when the fact that the vehicle meets the condition of stopping charging is detected, whether the temperature of a battery pack of the vehicle is within a preset temperature range is judged;
if the temperature of the battery pack is determined to be within the preset temperature range, sending a command for controlling the high-voltage loop to be disconnected;
and sending a sleep command when the high-voltage loop is determined to be in the disconnected state.
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