CN113381460A - Charging control method and device and electric automobile - Google Patents
Charging control method and device and electric automobile Download PDFInfo
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- CN113381460A CN113381460A CN202010115475.0A CN202010115475A CN113381460A CN 113381460 A CN113381460 A CN 113381460A CN 202010115475 A CN202010115475 A CN 202010115475A CN 113381460 A CN113381460 A CN 113381460A
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- 238000007599 discharging Methods 0.000 claims abstract description 24
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- 238000001514 detection method Methods 0.000 claims description 3
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using 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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- General Chemical & Material Sciences (AREA)
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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a charging control method, a charging control device and an electric automobile, and relates to the technical field of electric automobiles, wherein the charging control method is applied to the electric automobile, the electric automobile comprises a power battery, a vehicle-mounted charger and a direct-current quick charging interface connected with the vehicle-mounted charger, a first switch unit is connected between the vehicle-mounted charger and the direct-current quick charging interface, and the charging control method comprises the following steps: identifying the connection confirmation signal voltage at the direct current quick charging interface; detecting a discharge switch signal when the connection confirmation signal voltage is a preset voltage; when the discharging switch signal is detected to be the first state information, the first switch unit is controlled to be in a closed state, and a direct current vehicle-to-vehicle charging instruction is sent to the battery management system BMS, so that the power battery can charge the charged vehicle connected to the direct current quick charging interface through the vehicle-mounted charger and the direct current quick charging interface. The scheme of the invention provides a direct current vehicle-to-vehicle charging mode so as to improve the charging efficiency and realize direct current high-power charging.
Description
Technical Field
The invention belongs to the technical field of electric automobiles, and particularly relates to a charging control method and device and an electric automobile.
Background
The charging modes of the electric automobile on the market at present are divided into two types: alternating current slow charging and direct current fast charging, which are called slow charging and fast charging for short:
slow charging: alternating current of a power grid passes through an alternating current slow charging port of a vehicle, the alternating current is converted into direct current by a vehicle-mounted charger to charge a power battery of the whole vehicle, the charging power is low, and the charging time is long;
and (3) quick charging: the alternating current of the power grid is converted into direct current by using an off-board charger, namely a direct current quick charging pile, and then the high-power charging is directly realized for the power battery of the whole vehicle through a vehicle direct current quick charging interface, so that the charging speed is high.
Due to successful research and development and industrialized popularization and application of the bidirectional vehicle-mounted charger, the energy of the power battery can be transferred out through the vehicle alternating-current slow charging port, and vehicle-to-vehicle charging is realized, namely, the third mode is an electric vehicle charging mode.
In the vehicle-to-vehicle charging process, energy from a discharged vehicle high-voltage power battery to a charged vehicle high-voltage power battery needs to pass through two vehicle-mounted chargers, the full-power charging efficiency of the vehicle-mounted chargers in the existing market is about 94% on average, and after the vehicle-to-vehicle charging passes through the two vehicle-mounted chargers, the charging efficiency is greatly reduced, namely the actual vehicle-to-vehicle charging efficiency is only about 94% multiplied by 94% or 88%.
Disclosure of Invention
The embodiment of the invention aims to provide a charging control method and device and an electric automobile, so that the problem of low charging efficiency of charging the automobile by an alternating current automobile in the prior art is solved.
In order to achieve the above object, the present invention provides a charging control method, which is applied to an electric vehicle, where the electric vehicle includes a power battery, a vehicle-mounted charger, and a dc fast charging interface connected to the vehicle-mounted charger, where a first switch unit is connected between the vehicle-mounted charger and the dc fast charging interface, and the charging control method includes:
identifying the connection confirmation signal voltage at the direct current quick charging interface;
detecting a discharge switch signal when the connection confirmation signal voltage is a preset voltage;
when the discharging switch signal is detected to be first state information, the first switch unit is controlled to be in a closed state, and a direct current vehicle-to-vehicle charging instruction is sent to a battery management system BMS, so that the power battery can charge a charged vehicle connected to the direct current quick charging interface through the vehicle-mounted charger and the direct current quick charging interface.
Optionally, the power battery is directly connected to the dc fast charging interface through a second switch unit, and when the discharging switch signal is detected to be the first state information and the first switch unit is controlled to be in the closed state, the method further includes:
and controlling the second switch unit to be in an off state.
Optionally, the method further comprises:
when the discharging switch signal is not detected, the first switch unit is controlled to be in a disconnected state, and a whole vehicle direct current quick charging instruction is sent to the BMS, so that the quick charging pile connected to the direct current quick charging interface can charge the power battery through the direct current quick charging interface.
Optionally, the method further comprises:
and when the discharging switch signal is detected to be the second state information, controlling the process of charging the charged vehicle to be finished.
The invention also provides a charging control method, which is applied to an electric automobile, wherein the electric automobile comprises a vehicle control unit VCU and a direct-current quick charging interface, and the charging control method comprises the following steps:
acquiring a direct current vehicle-to-vehicle charging instruction sent by the vehicle control unit VCU;
and responding the direct current vehicle-to-vehicle charging instruction, and performing direct current quick charging protocol interaction with a charged vehicle connected at the direct current quick charging interface.
Optionally, the method further comprises:
acquiring a direct-current quick charging instruction of the whole vehicle sent by the vehicle control unit VCU;
and responding the direct-current quick-charging instruction of the whole vehicle, and performing direct-current quick-charging protocol interaction with a quick-charging pile connected at the direct-current quick-charging interface.
The invention also provides a charging control device, which is applied to an electric automobile, wherein the electric automobile comprises a power battery, a vehicle-mounted charger and a direct-current quick charging interface connected with the vehicle-mounted charger, a first switch unit is connected between the vehicle-mounted charger and the direct-current quick charging interface, and the charging control device comprises:
the identification module is used for identifying the connection confirmation signal voltage at the direct-current quick-charging interface;
the detection module is used for detecting a discharge switch signal when the voltage of the connection confirmation signal is a preset voltage;
the first control module is used for controlling the first switch unit to be in a closed state when the discharging switch signal is detected to be first state information, and sending a direct current vehicle-to-vehicle charging instruction to a battery management system BMS, so that the power battery can charge a charged vehicle connected at the direct current quick charging interface through the vehicle-mounted charger and the direct current quick charging interface.
Optionally, the power battery is further directly connected to the dc fast charging interface through a second switch unit, and when the first control module detects that the discharge switch signal is the first state information and controls the first switch unit to be in the closed state, the apparatus further includes:
and the second control module is used for controlling the second switch unit to be in an off state.
Optionally, the apparatus further comprises:
and the third control module is used for controlling the first switch unit to be in a disconnected state when the discharging switch signal is not detected, and sending a whole vehicle direct-current quick-charging instruction to the BMS, so that the direct-current quick-charging interface is connected, and a quick-charging pile at the direct-current quick-charging interface can charge the power battery.
Optionally, the apparatus further comprises:
and the fourth control module is used for controlling the end of the process of charging the charged vehicle when the discharging switch signal is detected to be the second state information.
The invention also provides a charging control device, which is applied to an electric automobile, wherein the electric automobile comprises a vehicle control unit VCU and a direct-current quick charging interface, and the charging control device comprises:
the first acquisition module is used for acquiring a direct current vehicle-to-vehicle charging instruction sent by the vehicle control unit VCU;
and the first interaction module is used for responding to the direct current vehicle-to-vehicle charging instruction and carrying out direct current quick charging protocol interaction with a charged vehicle connected at the direct current quick charging interface.
Optionally, the apparatus further comprises:
the second acquisition module is used for acquiring a direct-current quick charging instruction of the whole vehicle, which is sent by the vehicle control unit VCU;
and the second interaction module is used for responding the direct-current quick-charging instruction of the whole vehicle and carrying out direct-current quick-charging protocol interaction with the quick-charging pile connected at the direct-current quick-charging interface.
The invention also provides an electric automobile which comprises a power battery, a vehicle-mounted charger, a vehicle control unit VCU, a battery management system BMS and the charging control device.
The technical scheme of the invention at least has the following beneficial effects:
in the above scheme of the embodiment of the present invention, the charging control method is applied to an electric vehicle, the electric vehicle includes a power battery, a vehicle-mounted charger, and a dc quick charging interface connected to the vehicle-mounted charger, wherein a first switch unit is connected between the vehicle-mounted charger and the dc quick charging interface, and the charging control method includes: identifying the connection confirmation signal voltage at the direct current quick charging interface; detecting a discharge switch signal when the connection confirmation signal voltage is a preset voltage; when the discharging switch signal is detected to be first state information, the first switch unit is controlled to be in a closed state, and a direct current vehicle-to-vehicle charging instruction is sent to a battery management system BMS, so that the power battery can charge a charged vehicle connected to the direct current quick charging interface through the vehicle-mounted charger and the direct current quick charging interface. According to the scheme, on the basis of considering the three charging modes of the existing direct-current quick-charging mode, the existing alternating-current slow-charging mode and the existing vehicle-to-vehicle charging mode realized by utilizing the bidirectional vehicle-mounted charger through the vehicle alternating-current slow-charging port, the charging mode of the vehicle-to-vehicle charging through the direct-current quick-charging port is added, so that the charging efficiency is improved, and the direct-current high-power charging is realized.
Drawings
Fig. 1 is a flowchart of a charging control method according to an embodiment of the present invention;
FIG. 2 is a charging diagram illustrating a charging control method according to an embodiment of the present invention;
fig. 3 is a flowchart of a charging control method according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention provides a charging control method and device and an electric automobile, aiming at the problem that in the prior art, the charging efficiency of a discharging vehicle for charging a charged vehicle by an alternating current vehicle is low by a bidirectional vehicle-mounted charger and an alternating current slow charging port.
As shown in fig. 1, an embodiment of the present invention provides a charging control method, which is applied to an electric vehicle, where the electric vehicle includes a power battery, a vehicle-mounted charger, and a dc fast charging interface connected to the vehicle-mounted charger, where a first switch unit is connected between the vehicle-mounted charger and the dc fast charging interface, and the charging control method includes:
step S11, identifying the connection confirmation signal voltage at the direct current quick charging interface;
step S12, when the voltage of the connection confirmation signal is a preset voltage, detecting a discharge switch signal;
and step S13, when the discharging switch signal is detected to be first state information, controlling the first switch unit to be in a closed state, and sending a direct current vehicle-to-vehicle charging instruction to a battery management system BMS, so that the power battery can charge a charged vehicle connected at the direct current quick charging interface through the vehicle-mounted charger and the direct current quick charging interface.
Specifically, the power battery is directly connected to the dc fast charging interface through a second switch unit, and when the discharging switch signal is detected to be the first state information and the first switch unit is controlled to be in the closed state, the method further includes:
and controlling the second switch unit to be in an off state.
In the embodiment of the present invention, as shown in fig. 2, one end of the vehicle-mounted charger is connected to the ac slow charging port, and the other end of the vehicle-mounted charger is connected to the Power battery, and the vehicle-mounted charger includes a PFC unit (Power Factor Correction) and a DC conversion unit connected to the PFC unit, and is connected to the DC fast charging interface through the first switch unit. The first switch unit comprises two direct current quick charging relays, one ends of the two direct current quick charging relays are respectively connected with the PFC unit and the DC conversion unit, and the other ends of the two direct current quick charging relays are respectively connected with the direct current quick charging interface. The second switch unit comprises two whole vehicle quick-charging relays, one end of each second switch unit is connected with a power battery, and the other end of each second switch unit is connected with a quick-charging interface. The vehicle control unit VCU is connected to a CAN bus through a Controller Area Network (CAN) line of the whole vehicle to communicate with the vehicle-mounted charger and the BMS.
The VCU identifies the connection confirmation signal voltage at the direct current quick charging interface; when the connection confirmation signal voltage is a preset voltage, the VCU detects a signal of a discharge switch connected thereto, and optionally, the preset voltage is 6V; when the VCU detects that the electric switch signal is the first state information, optionally, the first state information is a single-time discharge switch signal, the first switch unit is controlled to be in a closed state, the second switch unit is controlled to be in an open state, and a direct-current vehicle-to-vehicle charging instruction is sent to the BMS.
The discharge switch for charging the dc vehicle-to-vehicle is multiplexed with the discharge switch for charging the ac vehicle-to-vehicle.
Specifically, the charge control method further includes:
and when the VCU does not detect the discharge switch signal, the VCU controls the first switch unit to be in a disconnected state and sends a whole vehicle direct-current quick-charging instruction to the BMS, so that the quick-charging pile connected to the direct-current quick-charging interface can charge the power battery through the direct-current quick-charging interface.
Further, the charge control method further includes:
when detecting that the discharge switch signal is the second state information, the VCU optionally controls the end of the process of charging the charged vehicle, where the second state information is a discharge switch signal of double times.
In the embodiment of the invention, when detecting the discharge switch signal of the alternating current slow charging port, the VCU controls the first switch unit to be in the off state, and the VCU of the discharging vehicle controls the power battery to charge the charged vehicle with alternating current through the alternating current slow charging port and the vehicle-mounted charger.
As shown in fig. 3, an embodiment of the present invention further provides a charging control method, which is applied to an electric vehicle, where the electric vehicle includes a vehicle control unit VCU and a dc fast charging interface, where the charging control method includes:
step S31, acquiring a dc vehicle-to-vehicle charging instruction sent by the vehicle control unit VCU;
and step S32, responding to the direct current vehicle-to-vehicle charging instruction, and performing direct current quick charging protocol interaction with the vehicle to be charged connected at the direct current quick charging interface.
Further, the charge control method further includes:
acquiring a direct-current quick charging instruction of the whole vehicle sent by the vehicle control unit VCU;
and responding the whole vehicle quick-charging instruction, and performing direct-current quick-charging protocol interaction with a quick-charging pile connected at the direct-current quick-charging interface.
In the embodiment of the invention, the BMS acquires and responds to a direct-current vehicle-to-vehicle charging instruction sent by the VCU, the analog quick-charging pile performs direct-current quick-charging protocol interaction with a charged vehicle connected at the direct-current quick-charging interface through the quick-charging CAN, and controls the DC conversion unit in the vehicle-mounted charger to output the electricity of the power battery to charge the charged vehicle through the direct-current quick-charging interface.
And the BMS acquires and responds to a finished automobile direct-current quick-charging instruction sent by the VCU, and performs direct-current quick-charging protocol interaction with a quick-charging pile connected at the direct-current quick-charging interface through the quick-charging CAN to complete the finished automobile direct-current quick-charging process.
The embodiment of the invention also provides a charging control device, which is applied to an electric automobile, wherein the electric automobile comprises a power battery, a vehicle-mounted charger and a direct-current quick charging interface connected with the vehicle-mounted charger, a first switch unit is connected between the vehicle-mounted charger and the direct-current quick charging interface, and the charging control device comprises:
the identification module is used for identifying the connection confirmation signal voltage at the direct-current quick-charging interface;
the detection module is used for detecting a discharge switch signal when the voltage of the connection confirmation signal is a preset voltage;
the first control module is used for controlling the first switch unit to be in a closed state when the discharging switch signal is detected to be first state information, and sending a direct current vehicle-to-vehicle charging instruction to a battery management system BMS, so that the power battery can charge a charged vehicle connected at the direct current quick charging interface through the vehicle-mounted charger and the direct current quick charging interface.
Specifically, power battery still through the second switch unit directly with the interface connection is filled soon to the direct current, detects at first control module the switching signal that discharges is first state information, control when first switch unit is the closure state, the device still includes:
and the second control module is used for controlling the second switch unit to be in an off state.
Further, the apparatus further comprises:
and the third control module is used for controlling the first switch unit to be in a disconnected state when the discharging switch signal is not detected, and sending a whole vehicle direct-current quick-charging instruction to the BMS, so that the direct-current quick-charging interface is connected, and a quick-charging pile at the direct-current quick-charging interface can charge the power battery.
Still further, the apparatus further comprises:
and the fourth control module is used for controlling the end of the process of charging the charged vehicle when the discharging switch signal is detected to be the second state information.
The embodiment of the present invention further provides a charging control device, which is applied to an electric vehicle, where the electric vehicle includes a vehicle control unit VCU and a direct current quick charging interface, and the charging control device includes:
the first acquisition module is used for acquiring a direct current vehicle-to-vehicle charging instruction sent by the vehicle control unit VCU;
and the first interaction module is used for responding to the direct current vehicle-to-vehicle charging instruction and carrying out direct current quick charging protocol interaction with a charged vehicle connected at the direct current quick charging interface.
Specifically, the apparatus further comprises:
the second acquisition module is used for acquiring a direct-current quick charging instruction of the whole vehicle, which is sent by the vehicle control unit VCU;
and the second interaction module is used for responding the direct-current quick-charging instruction of the whole vehicle and carrying out direct-current quick-charging protocol interaction with the quick-charging pile connected at the direct-current quick-charging interface.
In this embodiment of the present invention, the charging control apparatus applies the charging control method as described above, and details thereof are not repeated here.
The embodiment of the invention also provides an electric automobile which comprises a power battery, a vehicle-mounted charger, a vehicle control unit VCU, a battery management system BMS and the charging control device.
In the embodiment of the invention, the electric automobile is additionally provided with a direct-current vehicle-to-vehicle charging mode realized through the direct-current quick charging interface on the basis of three charging modes, namely a direct-current quick charging mode, an alternating-current slow charging mode and an alternating-current vehicle-to-vehicle charging mode realized through the alternating-current slow charging port and the vehicle-mounted motor, so that the charging efficiency is improved; the direct current vehicle-to-vehicle charging can be realized by the combined judgment of the discharging switch for the vehicle-to-vehicle charging of the multiplexing alternating current vehicle and the voltage of the connection confirmation signal so as to distinguish a direct current quick charging mode and a direct current mode of the whole vehicle; meanwhile, the high-power charging of the direct-current vehicle can be realized, and the low-power alternating-current vehicle charging is also considered; the electric automobile can charge the electric automobile with the direct current automobile-to-automobile charging function and can also charge the existing electric automobile without the direct current automobile-to-automobile charging function, and the electric automobile has better compatibility.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (13)
1. The charging control method is characterized by being applied to an electric automobile, wherein the electric automobile comprises a power battery, a vehicle-mounted charger and a direct-current quick-charging interface connected with the vehicle-mounted charger, a first switch unit is connected between the vehicle-mounted charger and the direct-current quick-charging interface, and the charging control method comprises the following steps:
identifying the connection confirmation signal voltage at the direct current quick charging interface;
detecting a discharge switch signal when the connection confirmation signal voltage is a preset voltage;
when the discharging switch signal is detected to be first state information, the first switch unit is controlled to be in a closed state, and a direct current vehicle-to-vehicle charging instruction is sent to a battery management system BMS, so that the power battery can charge a charged vehicle connected to the direct current quick charging interface through the vehicle-mounted charger and the direct current quick charging interface.
2. The charge control method according to claim 1, wherein the power battery is further directly connected to the dc fast charge interface through a second switch unit, and when the discharge switch signal is detected as the first state information and the first switch unit is controlled to be in the closed state, the method further comprises:
and controlling the second switch unit to be in an off state.
3. The charge control method according to claim 1, characterized by further comprising:
when the discharging switch signal is not detected, the first switch unit is controlled to be in a disconnected state, and a whole vehicle direct current quick charging instruction is sent to the BMS, so that the quick charging pile connected to the direct current quick charging interface can charge the power battery through the direct current quick charging interface.
4. The charge control method according to claim 1, characterized by further comprising:
and when the discharging switch signal is detected to be the second state information, controlling the process of charging the charged vehicle to be finished.
5. A charging control method is applied to an electric vehicle, wherein the electric vehicle comprises a Vehicle Control Unit (VCU) and a direct-current quick charging interface, and the charging control method comprises the following steps:
acquiring a direct current vehicle-to-vehicle charging instruction sent by the VCU;
and responding the direct current vehicle-to-vehicle charging instruction, and performing direct current quick charging protocol interaction with a charged vehicle connected at the direct current quick charging interface.
6. The charge control method according to claim 5, characterized by further comprising:
acquiring a direct current quick charging instruction of the whole vehicle sent by the VCU;
and responding the direct-current quick-charging instruction of the whole vehicle, and performing direct-current quick-charging protocol interaction with a quick-charging pile connected at the direct-current quick-charging interface.
7. The utility model provides a charge control device, its characterized in that is applied to electric automobile, electric automobile include power battery, on-vehicle machine that charges and with the direct current that on-vehicle machine that charges is connected fills the interface soon, wherein on-vehicle machine that charges with the direct current fills and is connected with first switch unit between the interface soon, charge control device includes:
the identification module is used for identifying the connection confirmation signal voltage at the direct-current quick-charging interface;
the detection module is used for detecting a discharge switch signal when the voltage of the connection confirmation signal is a preset voltage;
and the first control module is used for controlling the first switch unit to be in a closed state when the discharging switch signal is detected to be the first state information, and sending a direct current vehicle-to-vehicle charging instruction to a Battery Management System (BMS), so that the power battery can charge the charged vehicle connected at the direct current quick charging interface through the vehicle-mounted charger and the direct current quick charging interface.
8. The charging control device according to claim 7, wherein the power battery is further directly connected to the dc fast charging interface through a second switch unit, and when the first control module detects that the discharging switch signal is the first state information and controls the first switch unit to be in the closed state, the device further comprises:
and the second control module is used for controlling the second switch unit to be in an off state.
9. The charge control device according to claim 7, characterized by further comprising:
and the third control module is used for controlling the first switch unit to be in a disconnected state when the discharging switch signal is not detected, and sending a whole vehicle direct-current quick-charging instruction to the BMS, so that the direct-current quick-charging interface is connected, and a quick-charging pile at the direct-current quick-charging interface can charge the power battery.
10. The charge control device according to claim 7, characterized by further comprising:
and the fourth control module is used for controlling the end of the process of charging the charged vehicle when the discharging switch signal is detected to be the second state information.
11. A charging control device is applied to an electric automobile which comprises a Vehicle Control Unit (VCU) and a direct current quick charging interface, wherein the charging control device comprises:
the first acquisition module is used for acquiring a direct current vehicle-to-vehicle charging instruction sent by the vehicle control unit VCU;
and the first interaction module is used for responding to the direct current vehicle-to-vehicle charging instruction and carrying out direct current quick charging protocol interaction with a charged vehicle connected at the direct current quick charging interface.
12. The charge control device according to claim 11, characterized by further comprising:
the second acquisition module is used for acquiring a finished vehicle quick charging instruction sent by the vehicle control unit VCU;
and the second interaction module is used for responding the direct-current quick-charging instruction of the whole vehicle and carrying out direct-current quick-charging protocol interaction with the quick-charging pile connected at the direct-current quick-charging interface.
13. An electric vehicle, characterized in that it comprises a power battery, an on-board charger, a vehicle control unit VCU, a battery management system BMS, a charge control device according to any of claims 7 to 10 and a charge control device according to any of claims 11 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010115475.0A CN113381460A (en) | 2020-02-25 | 2020-02-25 | Charging control method and device and electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010115475.0A CN113381460A (en) | 2020-02-25 | 2020-02-25 | Charging control method and device and electric automobile |
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| CN113381460A true CN113381460A (en) | 2021-09-10 |
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| CN202010115475.0A Pending CN113381460A (en) | 2020-02-25 | 2020-02-25 | Charging control method and device and electric automobile |
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