CN108128175B - Power supply method and circuit for alternating-current charging vehicle control device of electric vehicle - Google Patents
Power supply method and circuit for alternating-current charging vehicle control device of electric vehicle Download PDFInfo
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- CN108128175B CN108128175B CN201611093080.5A CN201611093080A CN108128175B CN 108128175 B CN108128175 B CN 108128175B CN 201611093080 A CN201611093080 A CN 201611093080A CN 108128175 B CN108128175 B CN 108128175B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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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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- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- 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 relates to a power supply method and a circuit of an electric vehicle alternating-current charging vehicle control device, wherein the power supply method comprises the following steps: before charging starts, the connection confirmation terminal is communicated with a power supply control circuit of the vehicle control device; after the charging is started, the connection confirmation terminal is disconnected from the power supply control circuit of the vehicle control device, and the disconnected state is maintained after the charging is completed; when the vehicle starts, the state that the connection confirmation terminal is communicated with the power supply control circuit of the vehicle control device is restored; the connection confirmation terminal is a terminal for connecting a charge confirmation signal (PP), and the power supply control circuit is a circuit for supplying power to the vehicle control device. The invention effectively avoids the situation that the vehicle control device can recharge after the charging of the vehicle control device is completed and the charging plug is plugged in again after being pulled out, so that the charging cannot be completely disconnected and repeated charging is realized.
Description
Technical Field
The invention relates to a power supply method and a circuit of an electric vehicle alternating-current charging vehicle control device, and belongs to the technical field of electronic control.
Background
In IEC 61851-23-2014 electric automobile conduction charging System part 23: in the schematic diagram of the combined direct current charging system of the direct current electric automobile charging station, as the charger does not provide a low-voltage power supply, the vehicle control device needs to automatically detect the connection condition of the charging plug, and when the charging plug is inserted, the vehicle control device is electrified and communicated with the charger; after the charging is finished, the charging plug is pulled out to disconnect the power supply.
The Chinese patent document with publication number CN 103701166A discloses an electric automobile and a power supply circuit of an alternating-current charging vehicle control device, wherein the working principle of the power supply circuit of the alternating-current charging vehicle control device is as follows: in a normal working state, a control end Ctrl of the vehicle control device is in a high-resistance state, after the charging plug is inserted, a CC terminal signal pulls down a base electrode of a triode Q1 through a resistor R22, Q1 is conducted, a relay KM1 is controlled to be attracted, a power supply end Vpw is electrified after the attraction, the relay KM1 is self-locking and can continuously supply power to the vehicle control unit, no voltage and current exist on R21, R22 and Q1 after the relay is attracted, but CC signal sampling is not influenced, after the vehicle plug is pulled down, the vehicle control device detects that the CC terminal is disconnected, the control end Ctrl outputs a low-side signal, the triode Q2 is cut off, a contact of the relay KM1 is released, the Vpw is powered down, and the vehicle control device stops working.
The power supply circuit realizes automatic power supply control of the vehicle control device, reduces manual operation, and improves working efficiency and safety during charging. However, after the charging is completed, since the relay KM1 needs to be turned off by the transistor Q2, the control reliability is not high; and when the charging plug is plugged in again after being pulled out after the charging is completed, the vehicle control device can recharge, and the situation that the charging cannot be completely disconnected and repeated charging is caused.
Disclosure of Invention
The invention aims to provide a power supply method and a circuit of an alternating-current charging vehicle control device of an electric vehicle, which are used for solving the technical problem that the vehicle control device can recharge after the charging of the electric vehicle is completed and when a charging plug is plugged in again after the charging plug is pulled out, so that the charging cannot be completely disconnected and repeated charging is caused.
In order to solve the technical problems, the invention provides a power supply method of an electric automobile alternating-current charging vehicle control device, which comprises the following steps:
the method comprises the following steps: the method comprises the following steps:
before charging starts, the connection confirmation terminal is communicated with a power supply control circuit of the vehicle control device;
after the charging is started, the connection confirmation terminal is disconnected from the power supply control circuit of the vehicle control device, and the disconnected state is maintained after the charging is completed;
when the vehicle starts, the state that the connection confirmation terminal is communicated with the power supply control circuit of the vehicle control device is restored;
the connection confirmation terminal is a terminal for connecting a charge confirmation signal (PP), and the power supply control circuit is a circuit for supplying power to the vehicle control device.
The method scheme II is as follows: on the basis of the first method, the vehicle control device controls the connection confirmation terminal to be connected or disconnected with a power supply control circuit of the vehicle control device through a magnetic latching relay.
The invention also provides a power supply circuit of the control device of the alternating-current charging vehicle of the electric automobile, which comprises the following schemes:
circuit scheme one: the circuit includes a gating switch and a power supply control circuit for supplying power to a vehicle control device; the connection confirmation terminal is connected with the power supply control circuit through the gating switch; the vehicle control device controls the gate switch:
before charging starts, the vehicle control device controls the gating switch to communicate the connection confirmation terminal with the power supply control circuit;
after the charging is started, the vehicle control device controls the gating switch to disconnect the connection confirmation terminal from the power supply control circuit, and the gating switch is still kept in a disconnected state after the charging is completed;
when the vehicle starts, the vehicle control device controls the gating switch to be restored to be communicated with the connection confirmation terminal and the power supply control circuit;
the connection confirmation terminal is a terminal for connecting a charge confirmation signal (PP).
Circuit scheme II: on the basis of a first circuit scheme, the gating switch is a magnetic latching relay (K1), and a first control signal (Ctr 1) and a second control signal (Ctr 2) of a vehicle control device are connected with the magnetic latching relay (K1); after the start of charging, the first control signal (Ctr 1) is active and the second control signal (Ctr 2) is inactive; after the charging is completed, the first control signal (Ctr 1) is invalid, and the second control signal (Ctr 2) is invalid; when the vehicle starts, the first control signal (Ctr 1) is inactive, and the second control signal (Ctr 2) is active; the power supply control circuit comprises a switching tube and a relay (K2), wherein the switching tube is connected with a coil of the relay (K2) in series, and a contact of the relay (K2) is connected between a power end of the vehicle control device and a charging power supply in series; normally closed contacts (9, 10) of the magnetic latching relay (K1) are connected with the connection confirmation terminal and a trigger control end of the switching tube, and normally open contacts (9, 8) are connected with the connection confirmation terminal and a corresponding acquisition port of a vehicle control device; the vehicle control device controls the potential of the series point of the switching tube and the coil of the relay (K2) and is used for keeping the coil of the relay (K2) charged after the normally closed contacts (9, 10) of the magnetic latching relay (K1) are disconnected and switching off the coil of the relay (K2) after the charging is completed.
And a circuit scheme III: on the basis of a second circuit scheme, a first control signal (Ctr 1) of the vehicle control device is connected with a series point of the switching tube and the coil of the relay (K2).
Circuit schemes four and five: on the basis of a second or third circuit scheme, the switching tube is a triode (Q1), normally closed contacts (9, 10) of the magnetic latching relay (K1) are connected with the connection confirmation terminal and a base electrode of the triode (Q1), a collector electrode of the triode (Q1) is connected with a coil of the relay (K2), and an emitter electrode of the triode (Q1) is connected with the charging power supply.
Circuit scheme six, seven: on the basis of the second or third circuit scheme, a free-wheeling diode (D3) is connected between two ends of the relay (K2) coil.
Circuit scheme eight, nine: on the basis of a circuit scheme IV or V, a first control signal (Ctr 1) of the vehicle control device is connected with a series connection point of a triode (Q1) and a coil of a relay (K2) through a diode (D2), and a collector of the triode (Q1) is connected with the coil of the relay (K2) through the diode (D1).
The beneficial effects of the invention are as follows:
after the vehicle control device starts to charge, the connection between the confirmation terminal and the power supply control circuit of the vehicle control device is disconnected, and the state of disconnection is still kept after the charging is completed, so that the situation that the vehicle control device can recharge after the charging plug is pulled out and then plugged in again after the charging is completed, and the charging cannot be completely disconnected and repeated charging is avoided.
The power supply circuit comprises a gating switch and a power supply control circuit for supplying power to the vehicle control device, wherein after the charging plug is inserted into the vehicle control device to start charging, the vehicle control device controls the gating switch to disconnect the connection confirmation terminal from the power supply control circuit, and after the charging plug is pulled out to finish charging, the connection confirmation terminal and the power supply control circuit still keep a disconnected state, and at the moment, even if the charging plug is reinserted, the charging plug still cannot be charged. The circuit is connected with the power supply control circuit by disconnecting the connection confirmation terminal in the process of starting charging by inserting the charging plug for the first time, and the connection can be restored to be connected with the power supply control circuit until the connection confirmation terminal is started up, so that the situation that the vehicle control device can recharge after the charging plug is pulled out and then is plugged in again during the period, and the charging cannot be completely disconnected and repeated charging is caused.
Further, after the charging is completed, the relay coil is directly controlled to be disconnected by a control signal of the vehicle control device, and the vehicle control device stops the charging, so that the control reliability is correspondingly improved.
Drawings
Fig. 1 is a schematic diagram of a power supply circuit of an electric vehicle ac charging vehicle control device.
Detailed Description
The invention will now be described in detail with reference to the accompanying drawings and specific examples.
An embodiment of a power supply circuit of an alternating-current charging vehicle control device of an electric vehicle:
the power supply circuit comprises a gating switch and a power supply control circuit for supplying power to a vehicle control device, wherein a connection confirmation terminal is defined as a terminal for connecting a charging confirmation signal (PP), the connection confirmation terminal is connected with the power supply control circuit through the gating switch, the vehicle control device controls the gating switch, and the specific control process is as follows in the process of charging a vehicle:
before charging starts, the vehicle control device controls the gating switch to communicate the connection confirmation terminal with the power supply control circuit;
after the charging plug is inserted into the charging device, the vehicle control device controls the gating switch to disconnect the connection confirmation terminal from the power supply control circuit, and the vehicle control device still maintains the disconnected state after the charging is completed;
when the vehicle starts, the vehicle control device controls the gating switch to be restored to be connected with the connection confirmation terminal and the power supply control circuit.
Specifically, as shown in fig. 1, the gating switch is selected as a magnetic latching relay K1, a first control signal Ctr1 and a second control signal Ctr2 of the vehicle control device are respectively connected with input ports 1 and 6 of a coil of the magnetic latching relay K1, wiring ports 7 and 12 of the magnetic latching relay K1 are grounded, and normally closed contacts 9 and 10 of the magnetic latching relay K1 are used for realizing connection between a connection confirmation terminal and a power supply control circuit. Before the vehicle control device starts to charge, the connection confirmation terminal is connected with a power supply control circuit through normally closed contacts 9 and 10 of a magnetic latching relay K1; after the vehicle control device starts to charge, the first control signal Ctr1 of the vehicle control device is valid, the second control signal Ctr2 is invalid, the coil of the magnetic latching relay K1 is conducted and electrified, the normally closed contacts 9 and 10 of the magnetic latching relay K1 are disconnected, and the connection confirmation terminal is disconnected from the power supply control circuit; after the vehicle control device is charged, namely the battery is full or the charging plug is detected to be pulled out, the first control signal Ctr1 of the vehicle control device is invalid, and the second control signal Ctr2 is invalid, at the moment, the coil of the magnetic latching relay K1 is continuously conducted and electrified due to the relay characteristic of the magnetic latching relay, and the connection confirmation terminal and the power supply control circuit are kept in a disconnected state; when the vehicle starts, the first control signal Ctr1 of the vehicle control device is invalid, the second control signal Ctr2 is valid, the coil of the magnetic latching relay K1 is disconnected and uncharged, the normally closed contacts 9 and 10 of the magnetic latching relay K1 are switched on, and the confirmation terminal is connected with the power supply control circuit in a restoration mode.
The power supply control circuit in this embodiment specifically includes a switching tube and a relay K2, the coils of the switching tube and the relay K2 are connected in series, a normally open contact of the relay K2 is connected in series between a power supply end Vcc of the vehicle control device and a charging power supply Vbat, normally closed contacts 9 and 10 of the magnetic latching relay K1 are used for realizing connection between a connection confirmation terminal and the switching tube, and normally open contacts 9 and 8 of the magnetic latching relay K1 are used for realizing connection between the connection confirmation terminal and a corresponding collection port PPSign of the vehicle control device. The vehicle control device is also responsible for controlling the potential of the series point of the switching tube and the relay coil, and the control purpose is as follows: under the condition that normally closed contacts 9 and 10 of a magnetic latching relay K1 are disconnected, a coil of a latching relay K2 is continuously electrified, and a power end Vcc of a vehicle control device is kept connected with a charging power source Vbat, so that the vehicle control device is ensured to continuously and normally charge; and after the vehicle control device is charged, the coil of the control relay K2 is powered off, the power end Vcc of the vehicle control device is disconnected from the charging power source Vbat, and the vehicle control device is charged.
As a specific embodiment, the first control signal Ctr1 of the vehicle control device is directly connected to the series point of the switching tube and the relay coil, so as to realize the potential control of the series point. When normally closed contacts 9 and 10 of the magnetic latching relay K1 are disconnected, a first control signal Ctr1 of the vehicle control device is effective, the potential of a series point is high, a coil of the relay K2 is conducted and electrified, a power end Vcc of the vehicle control device is kept connected with a charging power source Vbat, and the vehicle control device continuously charges normally; when the charging is completed, the first control signal Ctr1 of the vehicle control device is disabled, the potential of the series point is low, the coil of the relay K2 is not electrified, the connection between the power supply terminal Vcc of the vehicle control device and the charging power supply Vbat is disconnected, and the charging of the vehicle control device is completed. Of course, in the case of implementing the control function, other specific circuits in the prior art may be used to control the potential change of the series point.
The switch tube selects triode Q1, normally closed contacts 9 and 10 of the magnetic latching relay K1 are used for realizing connection between a connection confirmation terminal and a base electrode of the triode Q1, a collector electrode of the triode Q1 is connected with one end of a relay coil, and an emitter electrode of the triode Q1 is connected with a charging power supply Vbat.
In addition, a freewheeling diode D3 is connected between two ends of the relay coil, a first control signal Ctr1 of the vehicle control device is connected with a series point of the triode Q1 and the relay coil through a diode D2, the diode D1 is connected in series between a collector of the triode Q1 and the relay coil, a resistor R2 is connected in series between a base of the triode Q1 and normally closed contacts 9 and 10 of the magnetic latching relay K1, a resistor R1 is connected between the base of the triode Q1 and the emitter of the triode Q1, and a group of contacts of the magnetic latching relay K1 are further connected in series between the emitter of the triode Q1 and the charging power source Vbat, wherein the normally closed contacts 4 and 3 are used for connecting the emitter of the triode Q1 and the charging power source Vbat.
The working principle of the power supply circuit in fig. 1 is as follows: after the electric automobile is powered down after being stopped, the magnetic latching relay K1 and the relay K2 are both in an off state, after a charging plug is inserted, a PP signal is used for pulling down the base potential of the triode Q1 through a resistor R2, the triode Q1 is conducted, the relay K2 is attracted, the vehicle-mounted charging power supply Vbat supplies power to a vehicle control device through a normally open contact of the relay K2, the vehicle control device controls the Ctr1 to be effective and the Ctr2 to be invalid, the magnetic latching relay K1 is attracted, normally closed contacts 4 and 3 of the magnetic latching relay K1 are disconnected, normally open contacts 4 and 5 are conducted and suspended, normally closed contacts 9 and 10 are disconnected, normally open contacts 9 and 8 are conducted, the triode Q1 is cut off, a coil of the relay K2 is kept in a conducting state under the control of the Ctr1, a power end Vcc of the vehicle control device is connected with the charging power supply Vbat, the vehicle control device continuously charges normally, and an acquisition port PPSign of the vehicle control device samples PP signals through normally open contacts 9 and 8 of the magnetic latching relay K1, and the cut-off of the triode Q1 has no influence on signal sampling; after the vehicle control device is charged, the vehicle control device controls that the Ctr1 is invalid, the Ctr2 is invalid, the coil of the relay K2 is controlled by the Ctr1 to be powered off, the vehicle control device is powered off, the magnetic latching relay K1 keeps on keeping the attraction state, and the triode Q1 continuously stops; when the vehicle starts, the vehicle control device controls the Ctr1 to be invalid and the Ctr2 to be valid, the coil of the magnetic latching relay K1 is controlled to be powered off, and normally closed contacts 9 and 10 of the magnetic latching relay K1 are restored to be communicated with the connection confirmation terminal and the power supply control circuit, so that preparation is made for the next charging.
It should be noted that, when the vehicle starts, the vehicle control device gets power, the vehicle control device first controls Ctr1 to be active and Ctr2 to be inactive, the collection port PPSign of the vehicle control device samples PP signals through the normally open contacts 9 and 8 of the magnetic latching relay K1, and since the charging plug is pulled out at this time, the PP signals are inactive, which means that the vehicle is in a starting state, and then the control Ctr1 becomes inactive and Ctr2 becomes active. When the charging plug is inserted into the vehicle to be charged, the vehicle control device is electrified, and the vehicle control device firstly controls the Ctr1 to be effective and the Ctr2 to be ineffective, and the acquisition port PPSign of the vehicle control device samples PP signals through the normally open contacts 9 and 8 of the magnetic latching relay K1, so that the charging plug is inserted at the moment, the PP signals are effective, and the fact that the vehicle is in a charging state rather than a starting state is indicated, and the output of the vehicle control device is unchanged, namely the Ctr1 is continuously effective and the Ctr2 is continuously ineffective.
In the above power supply circuit of the control device for an ac charging vehicle for an electric vehicle, the core is a power supply method comprising:
first, a connection confirmation terminal is defined as a terminal for connecting a charge confirmation signal (PP), a power supply control circuit is a circuit for supplying power to a vehicle control device, and a power supply method of an electric vehicle alternating-current charging vehicle control device mainly includes the steps of:
before charging starts, the connection confirmation terminal is communicated with a power supply control circuit of the vehicle control device;
after the charging is started, the connection confirmation terminal is disconnected from the power supply control circuit of the vehicle control device, and the disconnected state is maintained after the charging is completed;
when the vehicle starts, the connection confirmation terminal is restored to be in communication with the power supply control circuit of the vehicle control device.
The specific circuit described above is one specific circuit configuration for realizing this method, and it should be noted that the method is not limited to the specific circuit described above for realizing the method. For example, in the above method, the connection confirmation terminal is connected to or disconnected from the power supply control circuit of the vehicle control device by controlling one of the magnetic latching relays. After the charging starts, the first control signal Ctr1 of the vehicle control device is effective, the second control signal Ctr2 is ineffective, the coil of the magnetic latching relay is conducted and electrified, and the connection confirmation terminal is disconnected with the power supply control circuit of the vehicle control device; after the charging is completed, the first control signal Ctr1 of the vehicle control device is changed from valid to invalid, and when the second control signal Ctr2 is continuously invalid, the coil of the magnetic latching relay is continuously conducted and electrified, and the connection confirmation terminal and the power supply control circuit of the vehicle control device are continuously kept in a disconnected state; when the vehicle starts, the first control signal Ctr1 of the vehicle control device continuously outputs invalidity, the second control signal Ctr2 is output from invalidity to invalidity, the coil of the magnetic latching relay is powered off according to the working principle of the magnetic latching relay, and the connection confirmation terminal is in recovery connection with the power supply control circuit of the vehicle control device and is ready for the next charging.
Claims (8)
1. The power supply method of the control device of the alternating-current charging vehicle of the electric automobile is characterized by comprising the following steps of:
before charging starts, the connection confirmation terminal is communicated with a power supply control circuit of the vehicle control device;
after the charging is started, the connection confirmation terminal is disconnected from the power supply control circuit of the vehicle control device, and the disconnected state is maintained after the charging is completed;
when the vehicle starts, the state that the connection confirmation terminal is communicated with the power supply control circuit of the vehicle control device is restored;
the connection confirmation terminal is a terminal for connecting a charge confirmation signal (PP), and the power supply control circuit is a circuit for supplying power to the vehicle control device.
2. The method for supplying power to an electric vehicle ac charge vehicle control device according to claim 1, wherein said vehicle control device controls said connection confirmation terminal to be connected to or disconnected from a power supply control circuit of the vehicle control device via a magnetic latching relay.
3. The power supply circuit of the alternating-current charging vehicle control device of the electric vehicle is characterized by comprising a gating switch and a power supply control circuit for supplying power to the vehicle control device; the connection confirmation terminal is connected with the power supply control circuit through the gating switch, and the vehicle control device controls the gating switch:
before charging starts, the vehicle control device controls the gating switch to communicate the connection confirmation terminal with the power supply control circuit;
after the charging is started, the vehicle control device controls the gating switch to disconnect the connection confirmation terminal from the power supply control circuit, and the gating switch is still kept in a disconnected state after the charging is completed;
when the vehicle starts, the vehicle control device controls the gating switch to be restored to be communicated with the connection confirmation terminal and the power supply control circuit;
the connection confirmation terminal is a terminal for connecting a charge confirmation signal (PP).
4. The electric vehicle ac charging vehicle control device power supply circuit according to claim 3, characterized in that the gate switch is a magnetic latching relay (K1), and the first control signal (Ctr 1) and the second control signal (Ctr 2) of the vehicle control device are connected to the magnetic latching relay (K1); after the start of charging, the first control signal (Ctr 1) is active and the second control signal (Ctr 2) is inactive; after the charging is completed, the first control signal (Ctr 1) is invalid, and the second control signal (Ctr 2) is invalid; when the vehicle starts, the first control signal (Ctr 1) is inactive, and the second control signal (Ctr 2) is active; the power supply control circuit comprises a switching tube and a relay (K2), wherein the switching tube is connected with a coil of the relay (K2) in series, and a contact of the relay (K2) is connected between a power end of the vehicle control device and a charging power supply in series; normally closed contacts (9, 10) of the magnetic latching relay (K1) are connected with the connection confirmation terminal and a trigger control end of the switching tube, and normally open contacts (9, 8) are connected with the connection confirmation terminal and a corresponding acquisition port of a vehicle control device; the vehicle control device controls the potential of the series point of the switching tube and the coil of the relay (K2) and is used for keeping the coil of the relay (K2) charged after the normally closed contacts (9, 10) of the magnetic latching relay (K1) are disconnected and switching off the coil of the relay (K2) after the charging is completed.
5. The electric vehicle ac charging vehicle control device power supply circuit according to claim 4, characterized in that a first control signal (Ctr 1) of the vehicle control device connects a series point of the switching tube and a coil of the relay (K2).
6. The electric vehicle ac charging vehicle control device power supply circuit according to claim 4 or 5, characterized in that the switching tube is a transistor (Q1), normally closed contacts (9, 10) of the magnetic latching relay (K1) are connected to the connection confirmation terminal and a base of the transistor (Q1), a collector of the transistor (Q1) is connected to a coil of the relay (K2), and an emitter of the transistor (Q1) is connected to the charging power supply.
7. The electric vehicle ac charging vehicle control device power supply circuit according to claim 4 or 5, characterized in that a freewheel diode (D3) is connected between both ends of the relay (K2) coil.
8. The electric vehicle ac charge vehicle control device power supply circuit according to claim 6, characterized in that a first control signal (Ctr 1) of the vehicle control device is connected to a series point of the transistor (Q1) and a coil of the relay (K2) through a diode (D2), and a collector of the transistor (Q1) is connected to the coil of the relay (K2) through the diode (D1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611093080.5A CN108128175B (en) | 2016-12-01 | 2016-12-01 | Power supply method and circuit for alternating-current charging vehicle control device of electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611093080.5A CN108128175B (en) | 2016-12-01 | 2016-12-01 | Power supply method and circuit for alternating-current charging vehicle control device of electric vehicle |
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| CN108128175A CN108128175A (en) | 2018-06-08 |
| CN108128175B true CN108128175B (en) | 2023-08-22 |
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