CN107264308B - Vehicle-mounted power supply system and automobile - Google Patents

Vehicle-mounted power supply system and automobile Download PDF

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Publication number
CN107264308B
CN107264308B CN201710399292.4A CN201710399292A CN107264308B CN 107264308 B CN107264308 B CN 107264308B CN 201710399292 A CN201710399292 A CN 201710399292A CN 107264308 B CN107264308 B CN 107264308B
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China
Prior art keywords
bidirectional
vehicle
control switch
power
module
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CN201710399292.4A
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Chinese (zh)
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CN107264308A (en
Inventor
鲁卫申
肖胜然
庄启超
蒋荣勋
苏伟
杨子发
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Beijing Electric Vehicle Co Ltd
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Beijing Electric Vehicle Co Ltd
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Priority to CN201710399292.4A priority Critical patent/CN107264308B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30Constructional details of charging stations
    • B60L53/31Charging columns specially adapted for electric vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0027Stations for charging mobile units, e.g. of electric vehicles, of mobile telephones
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0036Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/12Electric charging stations
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/14Plug-in electric vehicles

Abstract

The invention provides a vehicle-mounted power supply system and an automobile, wherein the vehicle-mounted power supply system comprises: a vehicle-mounted bidirectional charger; the power battery, the slow charging port and the electric socket are connected with the vehicle-mounted bidirectional charger; the vehicle-mounted bidirectional charger controls a charging pile connected with the slow charging port to supply power to the electric socket through the slow charging port or controls the power battery to supply power to the electric socket through the vehicle-mounted bidirectional charger through a first control switch and a second control switch which are connected with the vehicle-mounted bidirectional charger. By means of the power supply method for the electric socket, the charging power of the electric socket is improved, more high-power electric appliances in the vehicle can work, and meanwhile, the cost of the whole vehicle is reduced.

Description

Vehicle-mounted power supply system and automobile
Technical Field
The invention relates to the field of automobile charging, in particular to a vehicle-mounted power supply system and an automobile.
Background
The vehicle-mounted 220VAC power supply device mounted in a medium-high-end passenger vehicle, a commercial vehicle and a part of SUV vehicle types generally gets power from a 12V or 24V low-voltage storage battery and converts the power into 220VAC power through a special inverter unit, and the problems existing in the power supply mode of an electric socket in the prior art comprise that:
1. because the capacity of the 12V or 24V low-voltage storage battery is small, the electric power of 220VAC converted by the inverter unit is low, generally within 200W, and the use requirement of a user on a higher-power electric appliance cannot be met.
2. To function as a 220VAC electrical outlet, a dedicated inverter unit is required, adding to overall vehicle cost.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a vehicle-mounted power supply system and a vehicle, which are used for improving the power supply power of a 220VAC electric socket and reducing the cost of the whole vehicle.
In order to solve the above technical problem, an embodiment of the present invention provides a vehicle-mounted power supply system, including:
a vehicle-mounted bidirectional charger;
the power battery, the slow charging port and the electric socket are connected with the vehicle-mounted bidirectional charger;
the vehicle-mounted bidirectional charger controls a charging pile connected with the slow charging port to supply power to the electric socket through the slow charging port or controls the power battery to supply power to the electric socket through the vehicle-mounted bidirectional charger through a first control switch and a second control switch which are connected with the vehicle-mounted bidirectional charger.
Preferably, the vehicle-mounted bidirectional charger includes:
a vehicle-mounted bidirectional charging circuit;
the first end of the vehicle-mounted bidirectional charging circuit is connected with the slow charging port through the first control switch;
the first end of the vehicle-mounted bidirectional charging circuit is connected with the electric socket through the second control switch;
the second end of the vehicle-mounted bidirectional charging circuit is connected with the power battery, the third end of the vehicle-mounted bidirectional charging circuit is directly connected with the slow charging port, and the first control switch is connected with the second control switch;
the vehicle-mounted bidirectional charging circuit controls a charging pile connected with the slow charging port to supply power to the electric socket through the slow charging port or controls the power battery to supply power to the electric socket through the vehicle-mounted bidirectional charging circuit per se by controlling the on-off state of the first control switch and the second control switch according to a resistance value detected from the position of the slow charging port.
Preferably, the slow fill port comprises: the resistance detection interface and the power supply interface;
the first end of the vehicle-mounted bidirectional charging circuit is connected with the power supply interface through the first control switch;
and the third end of the vehicle-mounted bidirectional charging circuit is directly connected with the resistance detection interface.
Preferably, the on-vehicle bidirectional charging circuit includes:
the controller is respectively connected with the first control switch and the second control switch and is connected with the resistance detection interface;
a bidirectional AC/DC module respectively connected with the first control switch, the second control switch and the controller;
a bidirectional DC/DC module respectively connected with the bidirectional AC/DC module and the controller, wherein the bidirectional DC/DC module is connected with the power battery;
the controller is used for controlling the first control switch and the second control switch to be in a closed state when the resistance value of the resistance detection interface is a first resistance value and a discharging instruction is not received, so that the charging pile connected with the slow charging port supplies power to the electric socket through the power supply interface, and controls the bidirectional AC/DC module and the bidirectional DC/DC module, so that the charging pile connected with the slow charging port supplies power to the power battery through the power supply interface and the bidirectional AC/DC module; or the like, or, alternatively,
when the resistance value of the resistance detection interface is a second resistance value and a discharging instruction is received, controlling the first control switch and the second control switch to be in a closed state, and controlling the bidirectional AC/DC module and the bidirectional DC/DC module, so that the power battery supplies power to the electric socket through the bidirectional DC/DC module, and the power battery supplies power to an automobile to be charged connected with the slow charging port through the bidirectional DC/DC module and the power supply interface; or the like, or, alternatively,
when the resistance value of the resistance detection interface is a third resistance value, controlling the first control switch and the second control switch to be in a closed state, and controlling the bidirectional AC/DC module and the bidirectional DC/DC module, so that the power battery supplies power to the electrical socket through the bidirectional DC/DC module, and the power battery supplies power to an external alternating current load connected with the slow charging port through the bidirectional DC/DC module and the power supply interface; or
And when the resistance value of the resistance detection interface is a fourth resistance value, controlling the first control switch to be in an off state, controlling the second control switch to be in an on state, and controlling the bidirectional AC/DC module and the bidirectional DC/DC module to enable the power battery to supply power to the electric socket through the bidirectional DC/DC module.
Preferably, the second control switch is connected to the bidirectional AC/DC module and the first control switch through a current sensor, and the current sensor is connected to the controller;
the controller is used for controlling the second control switch in the closed state to be switched to the open state when the current value detected by the current sensor is a preset current value.
Preferably, the slow charging port further comprises: the controller is connected with the control guide interface through a control guide circuit;
the controller is used for determining whether the slow charging opening is successfully connected with the automobile to be charged or the charging pile according to the voltage value of the control guide interface.
Preferably, the control steering circuit includes:
a diode having a first end connected to the control pilot interface;
the diode comprises a first resistor and a second resistor which are connected with the second end of the diode, the first resistor is connected with the second resistor in parallel, the other end of the first resistor is grounded, the second resistor is grounded through a first switch, and the first switch is connected with the controller.
Preferably, the vehicle-mounted power supply system further includes:
the instrument is connected with the controller through a CAN bus;
the controller is used for sending information corresponding to the current working state of the second control switch to the instrument after the second control switch in the closed state is controlled to be switched to the open state according to the current value detected by the current sensor.
Preferably, the first control switch and the second control switch are integrated in the vehicle-mounted bidirectional charger or are both located outside the vehicle-mounted bidirectional charger.
According to another aspect of the embodiment of the invention, the embodiment of the invention further provides an automobile which comprises the vehicle-mounted power supply system.
Compared with the prior art, the vehicle-mounted power supply system and the automobile provided by the embodiment of the invention at least have the following beneficial effects:
in the embodiment of the invention, when the slow charging port is connected with the external charging pile through the charging gun, the external charging pile is used as a power supply mode to supply power to the electric socket, and the charging power provided to the electric socket by the external charging pile after conversion reaches 3300W; when the slow charging port is not connected with an external charging pile through a charging gun, the power battery supplies power to the electric socket, and the charging power provided by the power battery to the electric socket after conversion reaches 3300W; the charging power provided by the two power supply modes for the electric socket is far higher than the power provided by the prior art and lower than 200w, so that the electric socket can be used for more high-power electric appliances in a vehicle to work.
Meanwhile, the bidirectional power supply mode removes the arrangement of a special inverter unit in the prior art, and the cost of the whole vehicle is reduced due to the reduction of the arrangement of parts.
Drawings
FIG. 1 is a flow chart of a prior art manner of powering a 220VAC electrical outlet;
fig. 2 is a schematic structural diagram of a vehicle-mounted power supply system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a vehicle-mounted bidirectional charger according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a control pilot circuit 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. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion.
Referring to fig. 2 to 4, an embodiment of the present invention provides a vehicle-mounted power supply system, including: a vehicle-mounted bidirectional charger 1; the power battery 2, the slow charging port 3 and the electric socket 4 are connected with the vehicle-mounted bidirectional charger 1; the vehicle-mounted bidirectional charger 1 controls a charging pile connected with the slow charging port 3 to supply power to the electric socket 4 through the slow charging port 3 or controls the power battery 2 to supply power to the electric socket 4 through the vehicle-mounted bidirectional charger 1 by itself through a first control switch K1 and a second control switch K2 connected with the vehicle-mounted bidirectional charger 1.
In the embodiment of the invention, when the slow charging port 3 is connected with the charging pile through the charging gun, the charging pile is used as a power supply source to supply power to the electric socket 4, and the electric quantity provided by the charging pile is rectified by the vehicle-mounted bidirectional charger 1 and then provided for the electric socket 4, so that the charging power reaches 3300W; when the slow charging port 3 is not connected with the charging pile through the charging gun, the power battery 2 supplies power to the electric socket 4, and the electric quantity provided by the power battery 2 is inverted by the vehicle-mounted bidirectional charger 1, so that the charging power provided to the electric socket 4 reaches 3300W; the charging power provided by the two power supply modes for the electrical socket 4 is far higher than the power provided by the prior art and lower than 200w, so that the electrical socket 4 can meet more high-power loads in a vehicle to work.
Meanwhile, the bidirectional power supply mode removes the arrangement of a special inverter unit in the prior art, and the cost of the whole vehicle is reduced due to the reduction of the arrangement of parts.
Further, in the embodiment of the present invention, referring to fig. 2, the vehicle-mounted bidirectional charger 1 includes: an in-vehicle bidirectional charging circuit 11; the first end of the vehicle-mounted bidirectional charging circuit 11 is connected with the slow charging port 3 through the first control switch K1; a first end of the vehicle-mounted bidirectional charging circuit 11 is connected with the electric socket 4 through the second control switch K2; the second end of the vehicle-mounted bidirectional charging circuit 11 is connected with the power battery 2, the third end of the vehicle-mounted bidirectional charging circuit 11 is directly connected with the slow charging port 3, and the first control switch K1 is connected with the second control switch K2; the vehicle-mounted bidirectional charging circuit 11 controls the charging pile connected with the slow charging port 3 to supply power to the electrical socket 4 through the slow charging port 3 or controls the power battery 2 to supply power to the electrical socket 4 through the vehicle-mounted bidirectional charging circuit 11 by controlling the on-off state of the first control switch K1 and the second control switch K2 according to the resistance value detected from the position of the slow charging port 3.
Specifically, the on-vehicle bidirectional charging circuit 11 acquires the resistance value of the slow charging port 3 through the third terminal. The on-vehicle bidirectional charging circuit 11 stores in advance resistance values when the slow charging port 3 is connected to different components and when no component is connected, and determines a specific component to which the slow charging port 3 is connected by comparing and determining the detected actual resistance value with the prestored resistance value.
And further, in the present embodiment, the slow charging port 3 includes: the resistance detection interface CC and the power supply interface; the first end of the vehicle-mounted bidirectional charging circuit 11 is connected with the power supply interface through the first control switch K1; and the third end of the vehicle-mounted bidirectional charging circuit 11 is directly connected with the resistance detection interface CC.
Referring to fig. 1, in the embodiment of the present invention, the power supply interface includes L, N and PE three interfaces, which are interfaces for transmitting ac power, where the PE interface is a ground interface, the PE interface is connected to a vehicle body ground of the vehicle-mounted bidirectional charger 1 through a wire harness, and the first control switch K1 is connected to the L interface. Correspondingly, a power supply interface corresponding to the power supply interface of the slow charging port 3 is also respectively arranged on the vehicle-mounted bidirectional charging circuit 11 and the electric socket 4.
The third end of the vehicle-mounted bidirectional charging circuit 11 is provided with a direct current supply interface HV, the direct current supply interface HV comprises a positive direct current supply interface HV + and a negative direct current supply interface HV-, when the charging port 3 is connected with the charging pile through the charging gun, the alternating current provided by the charging pile is transmitted to the vehicle-mounted bidirectional charging circuit 11 through the power supply interface of the charging port 3, and the vehicle-mounted bidirectional charging circuit 11 is transmitted to the power battery 2 through the direct current supply interface HV after conversion.
Correspondingly, when the slow charging port 3 is not connected with a charging gun or a discharging gun, the power battery 2 is transmitted to the vehicle-mounted bidirectional charging circuit 11 through the direct current power supply interface HV, and after the vehicle-mounted bidirectional charging circuit 11 carries out inversion processing on the direct current transmitted by the power battery 2, the direct current is transmitted to the electric socket 4 through the power supply interface at the first end of the vehicle-mounted bidirectional charging circuit; when the slow charging port 3 is connected with the discharging gun, the vehicle-mounted bidirectional charging circuit 11 can transmit the direct current transmitted by the power battery 2 to the electric socket 4 after inversion processing and to an external alternating current load connected with the discharging gun or an automobile to be charged through the slow charging port 3.
In the embodiment of the present invention, the first control switch K1 and the second control switch K2 are both relays.
And further, in the embodiment of the present invention, referring to fig. 3, the on-vehicle bidirectional charging circuit 11 includes: a controller 111 connected to the first control switch K1 and the second control switch K2, respectively, and the controller 111 connected to the resistance detection interface CC; a bidirectional AC/DC module 112 respectively connected to the first control switch K1, the second control switch K2 and the controller 111; a bidirectional DC/DC module 113 connected to the bidirectional AC/DC module 112 and the controller 111, respectively, the bidirectional DC/DC module 113 being connected to the power battery 2; the controller 111 is configured to control both the first control switch K1 and the second control switch K2 to be in a closed state when the resistance value of the resistance detection interface CC is a first resistance value and a discharge instruction is not received, so that the charging pile connected to the slow charging port 3 supplies power to the electrical socket 4 through the power supply interface, and control the bidirectional AC/DC module 112 and the bidirectional DC/DC module 113, so that the charging pile connected to the slow charging port 3 supplies power to the power battery 2 through the power supply interface and the bidirectional AC/DC module 112; or the like, or, alternatively,
when the resistance value of the resistance detection interface CC is a second resistance value and a discharging instruction is received, controlling both the first control switch K1 and the second control switch K2 to be in a closed state, and controlling the bidirectional AC/DC module 112 and the bidirectional DC/DC module 113, so that the power battery 2 supplies power to the electrical socket 4 through the bidirectional DC/DC module 113, and the power battery 2 supplies power to the vehicle to be charged connected with the slow charging port 3 through the bidirectional DC/DC module 113 and the power supply interface; or the like, or, alternatively,
when the resistance value of the resistance detection interface CC is a third resistance value, controlling both the first control switch K1 and the second control switch K2 to be in a closed state, and controlling the bidirectional AC/DC module 112 and the bidirectional DC/DC module 113, so that the power battery 2 supplies power to the electrical socket 4 through the bidirectional DC/DC module 113, and the power battery 2 supplies power to an external alternating current load connected to the slow charging port 3 through the bidirectional DC/DC module 113 and the power supply interface; or
When the resistance value of the resistance detection interface CC is a fourth resistance value, the first control switch K1 is controlled to be in an off state, the second control switch K2 is controlled to be in an on state, and the bidirectional AC/DC module 112 and the bidirectional DC/DC module 113 are controlled, so that the power battery 2 supplies power to the electrical socket 4 through the bidirectional DC/DC module 113.
In the embodiment of the present invention, the first resistance value is equal to the second resistance value, the third resistance value is not equal to the first resistance value, and the fourth resistance value is an infinite resistance value.
The controller prompts information to a user after receiving the first resistance value or the second resistance value, so that the user can confirm whether to perform the discharging operation, and if the user performs the discharging operation within a preset time period, the controller judges that the discharging instruction is received; if the discharge command is not received within the preset time period, the discharge command is judged to be not received.
The controller 111 is connected to the first control switch K1 and the second control switch K2 for the purpose of controlling the open and closed states of the first control switch K1 and the second control switch K2. The control of the circuits inside the vehicle-mounted power supply system is realized by controlling the open/close states of the first control switch K1 and the second control switch K2. The controller 111 is connected to the resistance detection interface CC to obtain the resistance value of the slow charging port 3 after connecting different components.
In the embodiment of the invention, the vehicle which is charged by the vehicle-mounted bidirectional power supply system through the slow charging port is called as a to-be-charged automobile.
When the resistance value of the resistance detection interface CC is a first resistance value and a discharging instruction is not received, it indicates that the slow charging port 3 is connected to the charging pile through the charging gun, the vehicle-mounted bidirectional charging machine is in a charging mode, the controller controls the first control switch K1 and the second control switch K2 to be both in a closed state, a first phase of current provided by the charging pile is respectively transmitted to the electric socket 4 and the bidirectional AC/DC module 112 through an N interface of the slow charging port 3, a second phase of current is respectively transmitted to the electric socket 4 and the bidirectional AC/DC module 112 through an L interface of the slow charging port 3, and the bidirectional AC/DC module 112 rectifies the current and converts the current through the bidirectional DC/DC module 113 to transmit direct current meeting the charging requirement of the power battery 2 to the power battery 2.
When the resistance value of the resistance detection interface CC is the second resistance value and the discharging instruction is received, it indicates that the slow charging port 3 is connected with the vehicle to be charged through the first type of discharging gun, and at this time, the vehicle-mounted bidirectional charger 1 is in the inversion mode. At this time, after the electric quantity transmitted by the power battery 2 is converted by the bidirectional DC/DC module 113, the electric quantity is inverted into alternating current by the bidirectional AC/DC module 112 and then transmitted to the slow charging port 3 and the electrical outlet 4, so as to achieve the effects of charging the vehicle to be charged and supplying power to the electrical outlet 4.
When the resistance value of the resistance detection interface CC is the third resistance value, it indicates that the slow charging port 3 is connected to the external ac load through the second type of discharge gun. At this time, after the electric quantity transmitted by the power battery 2 is converted by the bidirectional DC/DC module 113, the electric quantity is inverted into alternating current by the bidirectional AC/DC module 112 and then transmitted to the slow charging port 3 and the electrical outlet 4, so as to realize the effects of charging an external alternating current load and supplying power to the electrical outlet 4.
When the resistance value of the resistance detection interface CC is the fourth resistance value, it indicates that the charging gun or the discharging gun is not connected to the slow charging port 3, and at this time, the power supply to the slow charging port 3 is not needed, so the controller 111 controls the first control switch K1 to be in the off state and controls the second control switch K2 to be in the on state, so as to implement the function of supplying power to the electrical outlet 4 through the power battery 2. In the process, the electric quantity transmitted by the power battery 2 is converted by the bidirectional DC/DC module 113, and then is inverted into alternating current by the bidirectional AC/DC module 112 and transmitted to the electrical outlet 4.
And further, in the embodiment of the present invention, referring to fig. 1, the second control switch K2 is connected to the bidirectional AC/DC module 112 and the first control switch K1 through a current sensor 12, respectively, and the current sensor 12 is connected to the controller 111; the controller 111 is configured to control the second control switch K2 in the closed state to switch to the open state when the current value detected by the current sensor 12 is a preset current value.
The setting function of the current sensor 12 is used for determining whether a circuit has a fault in the process of supplying power to the electrical socket 4, the controller 111 compares the current value detected by the current sensor 12 with a preset current value, and if the current value detected by the current sensor 12 is greater than the preset current value, the circuit is considered to have a fault, at this time, in order to ensure safety, the controller 111 controls the second control switch K2 to be switched from a closed state to an open state, and the power supply to the electrical socket 4 is stopped.
If the current value detected by the current sensor 12 is less than or equal to the preset current value, the circuit is considered to be good, and at this time, the second control switch K2 is not controlled, that is, the second control switch K2 is kept in a closed state.
And further, in the embodiment of the present invention, the slow charging port 3 further includes: a control pilot interface CP, to which the controller 111 is connected through a control pilot circuit 5; the controller 111 is configured to determine whether the slow charging port 3 is successfully connected to the vehicle to be charged or the charging pile according to the voltage value of the control pilot interface CP.
In order to prevent the loss of manpower and property caused by high-voltage electric leakage, the external charging pile must ensure the complete connection (i.e. successful connection) among the slow charging opening 3, the charging gun and the charging pile before charging the vehicle; under the two states of complete connection and incomplete connection, the voltage values corresponding to the control guidance interface CP are different, and whether the slow charging port 3 is completely connected with the charging pile or not is judged according to the voltage value corresponding to the control guidance interface CP.
Before the vehicle to be charged is charged, the power battery 2 must ensure the complete connection among the slow charging port 3, the discharging gun and the vehicle to be charged. Its principle is unanimous with the above-mentioned principle of charging power battery 2 through outside electric pile that fills, here, no longer explains.
And further, in the embodiment of the present invention, referring to fig. 4, the control steering circuit 5 includes: a diode D having a first end connected to the control pilot interface CP; a first resistor R1 and a second resistor R2 connected to the second end of the diode D, the first resistor R1 is connected in parallel to the second resistor R2, the other end of the first resistor R1 is grounded, the second resistor R2 is grounded through a first switch S1, and the first switch S1 is connected to the controller 111.
When the charging pile is completely connected, the controller 111 controls the first switch S to be in a closed state; when the connection with the charging pile is not completed, the controller 111 controls the first switch S1 to be in the open state. By controlling the closing or opening of the first switch S1, a change in the voltage value at the location of the control pilot interface CP is caused. According to the opening and closing of the first switch S1, the voltage value at the position of the guide interface CP is controlled under the two states of opening and closing of the first switch S1, so that whether the charging pile, the charging gun and the slow charging opening are completely connected or not is determined. When the first switch S1 is turned off, the voltage value detected at the location of the control pilot interface CP is the first preset voltage value, and when the voltage value detected at the location of the control pilot interface CP is the second preset voltage value after the first switch S2 is turned on, it indicates that the three are completely connected.
In the embodiment of the present invention, the control pilot circuit 5 further includes another set of circuits, and the voltage value at the position of the control pilot interface CP is detected by switching the set of circuits, so as to determine whether the slow charging port, the discharging gun and the external ac load are completely connected. The controller comprises a third resistor R3 and a second switch S2, wherein a first end of the third resistor R3 is connected with the control guide interface CP, a second end of the third resistor R3526 is connected with the second switch S2, the second switch S2 is connected with the controller, and the second switch S2 is a single-pole double-throw switch and is used for being connected with a 12V low-voltage storage battery or a pulse modulator PWM inside an automobile. If the voltage value detected at the position of the CP is converted from the third preset voltage value to the fourth preset voltage value within a preset time period, the fact that the automobile to be charged, the discharging gun and the slow charging port are completely connected is indicated.
And further, in an embodiment of the present invention, referring to fig. 2, the vehicle-mounted power supply system further includes: the instrument 6 is connected with the controller 111 through a CAN bus; wherein the controller 111 is configured to send information corresponding to the current operating state of the second control switch K2 to the meter 6 after controlling the second control switch K2 in the closed state to switch to the open state according to the current value detected by the current sensor 12.
After the controller 111 controls the second control switch K2 in the closed state to switch to the open state, the information corresponding to the current working state of the second control switch K2 is sent to the meter 6 as overcurrent fault information.
The meter 6 is provided to feed back circuit information to the driver, and when the current value detected by the current sensor 12 is less than or equal to the preset current value, the controller 111 sends current information detected by the current sensor 12 to the meter 6, wherein the current information is current information loaded on the electrical outlet 4 or current information not loaded on the electrical outlet 4.
Furthermore, in the embodiment of the present invention, the first control switch K1 and the second control switch K2 are both integrated in the vehicle-mounted bidirectional charger 1 or both located outside the vehicle-mounted bidirectional charger 1.
In the embodiment of the invention, the first control switch K1, the second control switch K2, the current sensor 12 and the vehicle-mounted bidirectional charger 1 form a high-voltage integrated control unit PEU.
According to the vehicle-mounted power supply system provided by the embodiment of the invention, when the power battery 2 is charged by the charging pile, 3300w of high-power electric quantity is provided for the electric socket 4 through the charging pile; when the charging pile is not connected, 3300w of high-power electric quantity is provided for the electric socket 4 by the vehicle-mounted bidirectional charger 1, so that the power supply of more loads in a vehicle can be met; in addition, an inverter unit is omitted, and the cost of the whole vehicle is reduced.
According to another aspect of the embodiment of the invention, the embodiment of the invention further provides an automobile which comprises the vehicle-mounted power supply system.
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 (9)

1. An on-vehicle power supply system, characterized by comprising:
a vehicle-mounted bidirectional charger (1);
the power battery (2), the slow charging port (3) and the electric socket (4) are connected with the vehicle-mounted bidirectional charger (1);
the vehicle-mounted bidirectional charger (1) controls a charging pile connected with the slow charging port (3) to supply power to the electric socket (4) through the slow charging port (3) through a first control switch (K1) and a second control switch (K2) connected with the vehicle-mounted bidirectional charger (1), and electric quantity provided by the charging pile is provided for the electric socket (4) after being rectified by the vehicle-mounted bidirectional charger (1); or the power battery (2) is controlled to supply power to the electric socket (4) through the vehicle-mounted bidirectional charger (1), and the electric quantity provided by the power battery (2) is provided to the electric socket (4) after inversion processing of the vehicle-mounted bidirectional charger (1);
wherein, on-vehicle bidirectional charging machine (1) includes:
an onboard bidirectional charging circuit (11); the on-vehicle bidirectional charging circuit (11) includes:
a controller (111) connected to the first control switch (K1) and the second control switch (K2), respectively;
a bidirectional AC/DC module (112) connected with the first control switch (K1), the second control switch (K2) and the controller (111), respectively;
a bidirectional DC/DC module (113) respectively connected with the bidirectional AC/DC module (112) and the controller (111), wherein the bidirectional DC/DC module (113) is connected with the power battery (2);
the first end of the vehicle-mounted bidirectional charging circuit (11) is connected with the slow charging port (3) through the first control switch (K1);
the first end of the vehicle-mounted bidirectional charging circuit (11) is connected with the electric socket (4) through the second control switch (K2);
the second end of the vehicle-mounted bidirectional charging circuit (11) is connected with the power battery (2), the third end of the vehicle-mounted bidirectional charging circuit (11) is directly connected with the slow charging port (3), and the first control switch (K1) is connected with the second control switch (K2);
the vehicle-mounted bidirectional charging circuit (11) controls a charging pile connected with the slow charging port (3) to supply power to the electric socket (4) through the slow charging port (3) or controls the power battery (2) to supply power to the electric socket (4) through the vehicle-mounted bidirectional charging circuit (11) by controlling the opening and closing states of the first control switch (K1) and the second control switch (K2) according to a resistance value detected from the position of the slow charging port (3);
the vehicle-mounted bidirectional charging circuit (11) acquires the resistance value of the slow charging port (3) through a third end, the vehicle-mounted bidirectional charging circuit (11) stores the resistance values of the slow charging port (3) when the slow charging port is connected with different components and when the components are not connected, and the specific components connected with the slow charging port (3) are determined according to the comparison and judgment of the detected actual resistance value and the prestored resistance value.
2. The onboard power supply system according to claim 1, wherein the slow charging port (3) comprises: a resistance detection interface (CC) and a power supply interface;
the first end of the vehicle-mounted bidirectional charging circuit (11) is connected with the power supply interface through the first control switch (K1);
and the third end of the vehicle-mounted bidirectional charging circuit (11) is directly connected with the resistance detection interface (CC).
3. The onboard power supply system according to claim 2, characterized in that the controller (111) is connected to the resistance detection interface (CC);
the controller (111) is used for controlling the first control switch (K1) and the second control switch (K2) to be in a closed state when the resistance value of the resistance detection interface (CC) is a first resistance value and a discharging instruction is not received, so that the charging pile connected with the slow charging port (3) supplies power to the electric socket (4) through the power supply interface, and controlling the bidirectional AC/DC module (112) and the bidirectional DC/DC module (113) so that the charging pile connected with the slow charging port (3) supplies power to the power battery (2) through the power supply interface and the bidirectional AC/DC module (112); or the like, or, alternatively,
when the resistance value of the resistance detection interface (CC) is a second resistance value and a discharging instruction is received, controlling the first control switch (K1) and the second control switch (K2) to be in a closed state, controlling the bidirectional AC/DC module (112) and the bidirectional DC/DC module (113), enabling the power battery (2) to supply power to the electric socket (4) through the bidirectional DC/DC module (113), and enabling the power battery (2) to supply power to a vehicle to be charged connected with the slow charging port (3) through the bidirectional DC/DC module (113) and the power supply interface; or the like, or, alternatively,
when the resistance value of the resistance detection interface (CC) is a third resistance value, controlling the first control switch (K1) and the second control switch (K2) to be in a closed state, controlling the bidirectional AC/DC module (112) and the bidirectional DC/DC module (113), enabling the power battery (2) to supply power to the electric socket (4) through the bidirectional DC/DC module (113), and enabling the power battery (2) to supply power to an external alternating current load connected with the slow charging port (3) through the bidirectional DC/DC module (113) and the power supply interface; or
When the resistance value of the resistance detection interface (CC) is a fourth resistance value, the first control switch (K1) is controlled to be in an open state, the second control switch (K2) is controlled to be in a closed state, and the bidirectional AC/DC module (112) and the bidirectional DC/DC module (113) are controlled, so that the power battery (2) supplies power to the electric socket (4) through the bidirectional DC/DC module (113).
4. The on-vehicle power supply system according to claim 3, characterized in that the second control switch (K2) is connected with the bidirectional AC/DC module (112) and the first control switch (K1) respectively through a current sensor (12), and the current sensor (12) is connected with the controller (111);
the controller (111) is used for controlling the second control switch (K2) in the closed state to be switched to the open state when the current value detected by the current sensor (12) is a preset current value.
5. The on-vehicle power supply system according to claim 4, wherein the slow charging port (3) further includes: a control pilot interface (CP), to which the controller (111) is connected via a control pilot circuit (5);
the controller (111) is used for determining whether the slow charging opening (3) is successfully connected with the automobile to be charged or the charging pile according to the voltage value of the control guide interface (CP).
6. The onboard power supply system according to claim 5, characterized in that the control pilot circuit (5) comprises:
a diode (D) having a first end connected to the control pilot interface (CP);
a first resistor (R1) and a second resistor (R2) connected to a second terminal of the diode (D), wherein the first resistor (R1) is connected in parallel to the second resistor (R2), the other terminal of the first resistor (R1) is grounded, the second resistor (R2) is grounded through a first switch (S1), and the first switch (S1) is connected to the controller (111).
7. The vehicle power supply system according to claim 6, further comprising:
the instrument (6) is connected with the controller (111) through a CAN bus;
wherein the controller (111) is used for sending information corresponding to the current working state of the second control switch (K2) to the instrument (6) after controlling the second control switch (K2) in the closed state to be switched to the open state according to the current value detected by the current sensor (12).
8. The vehicle power supply system according to claim 1, characterized in that the first control switch (K1) and the second control switch (K2) are both integrated within the vehicle-mounted bidirectional charger (1) or both located outside the vehicle-mounted bidirectional charger (1).
9. An automobile characterized by comprising the on-board power supply system of any one of claims 1 to 8.
CN201710399292.4A 2017-05-31 2017-05-31 Vehicle-mounted power supply system and automobile Active CN107264308B (en)

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CN109177778A (en) * 2018-09-13 2019-01-11 安徽江淮汽车集团股份有限公司 A kind of electric car inversion is for arrangements of electric connection

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CN102574470A (en) * 2009-09-25 2012-07-11 丰田自动车株式会社 Vehicle charging system and electric vehicle equipped with same
CN104201736A (en) * 2014-08-18 2014-12-10 苏州克兰兹电子科技有限公司 Control and guide circuit for alternating current charging pile of vehicle
CN204103532U (en) * 2014-08-01 2015-01-14 比亚迪股份有限公司 A kind of two-way charger

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Publication number Priority date Publication date Assignee Title
CN102574470A (en) * 2009-09-25 2012-07-11 丰田自动车株式会社 Vehicle charging system and electric vehicle equipped with same
WO2012055311A1 (en) * 2010-10-29 2012-05-03 皆盈绿动能科技股份有限公司 Vehicle power supply system and power supply management method thereof
CN204103532U (en) * 2014-08-01 2015-01-14 比亚迪股份有限公司 A kind of two-way charger
CN104201736A (en) * 2014-08-18 2014-12-10 苏州克兰兹电子科技有限公司 Control and guide circuit for alternating current charging pile of vehicle

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