CN106799972B - Electric automobile charging box - Google Patents

Electric automobile charging box Download PDF

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Publication number
CN106799972B
CN106799972B CN201710112831.1A CN201710112831A CN106799972B CN 106799972 B CN106799972 B CN 106799972B CN 201710112831 A CN201710112831 A CN 201710112831A CN 106799972 B CN106799972 B CN 106799972B
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China
Prior art keywords
circuit
relay
resistor
coil
switch circuit
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CN201710112831.1A
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Chinese (zh)
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CN106799972A (en
Inventor
胡清
令狐云波
林国军
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Shenzhen Busbar Sci Tech Development Co Ltd
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Shenzhen Busbar Sci Tech Development Co Ltd
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    • H02J7/045—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses an electric automobile charging box, which comprises a power input end, a power output end, an execution driving circuit connected between the power input end and the power output end and a control circuit connected with the execution driving circuit to output a control signal to the execution driving circuit, wherein the execution driving circuit comprises a relay circuit, a voltage dividing and current limiting circuit, a first switching circuit and a second switching circuit, and the control circuit respectively controls the closing of the first switching circuit and the second switching circuit; when the first switch circuit is conducted, the voltages at the two ends of the first relay and the second relay coil are in a higher level; when the first switch circuit is turned off and the second switch circuit is turned on, the voltage at two ends of the first relay and the second relay coil is in a lower level due to the action of the voltage dividing and current limiting circuit. The invention can reduce the power consumption of the relay coil and improve the reliability and stability of the product while ensuring the normal function of the charging box of the electric automobile.

Description

Electric automobile charging box
Technical Field
The invention relates to the technical field of electric automobiles, in particular to an electric automobile charging box.
Background
Electric vehicles are strategically emerging industries, and play an important role in improving energy safety, coping with climate change and improving environmental protection, and in recent years, development of electric vehicles is continuously increased.
The electric automobile charges and is the essential link in the electric automobile use, charges fast slow the rule that influences electric automobile user's trip. According to the technical characteristics and the use properties of the electric vehicle power battery pack, different charging modes can exist, including a slow charging mode, a quick charging mode, a mechanical charging mode and a wireless charging mode, wherein the slow charging mode is to charge by adopting an electric vehicle charging box equipped with a vehicle, so that a household power supply or a special charging pile power supply can be used, although the defects of the conventional charging mode are obvious, the charging time is long, the requirement on charging is not high, and the charging and mounting cost is low; the electric power valley period can be fully utilized for charging, so that the charging cost is reduced; the method has the advantages that the method can be used for deeply charging the battery, improves the charging and discharging efficiency of the battery and prolongs the service life of the battery, so that the slow charging mode is very widely applicable and can be set up in places such as families, public parking lots, public charging stations and the like which can be parked for a long time.
However, the current electric automobile charging box has the problems that the power consumption of the relay coil used as an alternating current switch is large, the heating temperature is increased, and the reliability and stability of the product are affected, so that how to reduce the power consumption of the relay coil and improve the reliability and stability of the product is a technical problem which needs to be solved.
Disclosure of Invention
The invention aims to solve the technical problem of providing the electric automobile charging box, which can reduce the power consumption of a relay coil and improve the reliability and stability of a product while ensuring the normal function of the electric automobile charging box.
To achieve the purpose, the invention adopts the following technical scheme:
an electric automobile charging box comprises a power input end, a power output end, an execution driving circuit connected between the power input end and the power output end, and a control circuit connected with the execution driving circuit to output a control signal to the execution driving circuit; the execution driving circuit comprises a relay circuit, a voltage-dividing and current-limiting circuit, a first switching circuit and a second switching circuit, wherein the relay circuit comprises a first relay and a second relay, a contact group of the first relay and a contact group of the second relay are connected between the power input end and the power output end, one ends of coils of the first relay and the second relay are connected with the input end of the voltage-dividing and current-limiting circuit and the first switching circuit, and the other ends of coils of the first relay and the second relay are connected with a direct current power supply; the output end of the voltage-dividing and current-limiting circuit is connected with a second switch circuit;
the control circuit is used for outputting control signals to the first switch circuit and the second switch circuit and controlling the first switch circuit and the second switch circuit to be closed respectively; when the first switch circuit is conducted, the voltages at the two ends of the first relay and the second relay coil are in a higher level; when the first switch circuit is turned off and the second switch circuit is turned on, the voltage at two ends of the first relay and the second relay coil is in a lower level due to the action of the voltage dividing and current limiting circuit.
The voltage-dividing and current-limiting circuit comprises a resistor R1 and a resistor R2, wherein one end of the resistor R1 is connected with one end of a coil of the first relay, and the other end of the resistor R1 is connected with the second switching circuit; one end of the resistor R2 is connected with one end of the coil of the second relay, and the other end of the resistor R2 is connected with the second switch circuit.
The first switch circuit comprises an enhanced NMOS tube Q1, the drain electrode of the enhanced NMOS tube Q1 is connected with one end of a coil of the first relay and one end of a coil of the second relay, the source electrode is connected with the GND end, and the grid electrode is a control signal input end and is connected with the control circuit;
the second switch circuit comprises an enhanced NMOS tube Q2, the drain electrode of the enhanced NMOS tube Q2 is connected with the other end of the resistor R1 and the other end of the resistor R2, the source electrode is connected with the GND end, and the grid electrode is a control signal input end and is connected with the control circuit.
Wherein, the grid electrode of the enhanced NMOS tube Q1 is connected with a control circuit through a current limiting resistor R4;
the grid electrode of the enhanced NMOS tube Q2 is connected with a control circuit through a current limiting resistor R3.
A resistor R6 is connected between the gate and the source of the enhanced NMOS transistor Q1, and a resistor R5 is connected between the gate and the source of the enhanced NMOS transistor Q2.
Wherein, the resistance values of the resistor R1 and the resistor R2 are both 51Ω.
One end of a coil of the first relay is connected with a rectifying diode D3 before being connected with a first switching circuit; one end of the coil of the second relay is also connected with a rectifier diode D4 before being connected with the first switch circuit.
The power supply system comprises an execution driving circuit, a DC/DC conversion circuit, an auxiliary power supply circuit, an electromagnetic interference (EMI) filter circuit, an AC/DC conversion circuit and a DC/DC conversion circuit, wherein the auxiliary power supply circuit comprises the EMI filter circuit, the AC/DC conversion circuit and the DC/DC conversion circuit, the EMI filter circuit is connected with a power input end, current transmitted by the power input end is subjected to filter processing and is transmitted to the AC/DC conversion circuit to output 12V direct current to the execution driving circuit and the DC/DC conversion circuit, and the DC/DC conversion circuit continuously converts the 12V direct current into 5V/3.3V direct current and outputs the 5V/3.3V direct current to a control circuit.
The power supply input end is connected with the execution driving circuit, the auxiliary power supply circuit and the control circuit through the A-type leakage sensor.
Wherein, the coil of the first relay is connected with a diode D1 in parallel; the coil of the second relay is connected with a diode D2 in parallel.
Compared with the prior art, the invention has the technical effects that: according to the invention, the first switch circuit and the second switch circuit are controlled to be closed by the control circuit, when a vehicle has a charging requirement, the control relay firstly controls the first switch circuit to be conducted, and the voltages at the two ends of the relay coil are in a higher level, so that the voltages at the two ends of the relay coil reach a starting requirement; after a certain time, the second switch is controlled to be turned on, and then the first switch is controlled to be turned on for the action of the voltage-dividing and current-limiting circuit, and the voltage at the two ends of the relay coil is in a lower level and still can normally work, so that the power consumption of the relay coil is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.
Fig. 1 is a circuit block diagram of an electric vehicle charging box according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of a driving circuit according to an embodiment of the present invention.
Fig. 3 is a circuit block diagram of an auxiliary power supply circuit according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
Fig. 1 is a schematic structural diagram of an electric vehicle charging box according to embodiment 1 of the present invention. Fig. 2 is a circuit diagram of a driving circuit according to an embodiment of the present invention. As shown in fig. 1 and 2, the electric vehicle charging box comprises a power input end 10, a power output end 15, an execution driving circuit 11 connected between the power input end 10 and the power output end 15, and a control circuit 12 connected with the execution driving circuit 11 to output a control signal to the execution driving circuit 11; the execution driving circuit 11 comprises a relay circuit, a voltage-dividing and current-limiting circuit, a first switch circuit and a second switch circuit, wherein the relay circuit 11 comprises a first relay K1 and a second relay K2, a contact group of the first relay K1 and a contact group of the second relay K2 are connected between the power input end 10 and the power output end 15, one ends of coils of the first relay K1 and the second relay K2 are connected with an input end of the voltage-dividing and current-limiting circuit 112 and the first switch circuit 113, and the other ends of coils of the first relay K1 and the second relay K2 are connected with a direct current power supply; the output end of the voltage-dividing and current-limiting circuit 112 is connected with a second switch circuit 114;
the control circuit 12 is configured to output a control signal to the first switch circuit 113 and the second switch circuit 114, and control the first switch circuit 113 and the second switch circuit 114 to be closed respectively; when the first switch circuit 113 is turned on, the voltages at the two ends of the coils of the first relay K1 and the second relay K2 are at a higher level; when the first switch circuit 113 is turned off and the second switch circuit 114 is turned on, the voltages across the coils of the first relay K1 and the second relay K2 are at a lower level due to the voltage dividing and current limiting circuit 112.
When the control circuit 12 detects that the vehicle has a charging requirement, a control signal is output to enable the first switch circuit 113 to be conducted, and when the first switch circuit 113 is conducted, the voltages at two ends of the coil of the first relay K1 and the second relay K2 reach the starting voltage, and the relay starts to work; the working voltage of the relay coil is lower than the starting voltage, after the relay is started, the voltage at the two ends of the relay coil can be reduced to the working voltage, so that the relay can continue to work normally under lower voltage drop, and the power consumption of the relay coil is reduced, so that after the first switch circuit 113 is conducted for a preset time, a control signal is output to enable the second switch circuit 114 to be conducted, and then the control signal is output to enable the first switch circuit 113 to be closed, and the voltage at the two ends of the first relay K1 and the second relay K2 coil is reduced to the working voltage due to the action of the voltage dividing and current limiting circuit 112, so that the power consumption of the relay is reduced. The control circuit 12 has two control signals for controlling the closing of the first switch circuit 113 and the second switch circuit 114, respectively. The relay of the electric automobile charging box provided by the embodiment adopts sectional driving, so that normal operation of the relay is ensured, and circuit power consumption can be reduced. The direct current power supply connected with the first relay K1 and the second relay K2 is a +12V direct current power supply.
In some preferred embodiments, as shown in fig. 2, the contact set (pin 4 and pin 3, pin 3 is an output) of the first relay K1 is connected to a live wire (L) of the power supply, and the contact set (pin 4 and pin 3, pin 3 is an output) of the second relay K2 is connected to a neutral wire (N) of the power supply. Two ends of a coil of the first relay K1 are respectively provided with a pin 1 and a pin 2, and the pin 2 is connected with a +12V direct current power supply; two ends of a coil of the second relay K2 are respectively provided with a pin 1 and a pin 2, and the pin 2 is connected with a +12V direct current power supply.
As shown in fig. 2, in some preferred embodiments, the voltage-dividing and current-limiting circuit 112 includes a resistor R1 and a resistor R2, where one end of the resistor R1 is connected to one end of the coil of the first relay K1, and the other end of the resistor R1 is connected to the second switch circuit 114; one end of the resistor R2 is connected to one end of the coil of the second relay K2, and the other end of the resistor R2 is connected to the second switch circuit 114. The resistor R1 and the resistor R2 can respectively enable the voltages at the two ends of the coil of the second relay K2 and the coil of the first relay K1 to be in a lower working level when the first switch circuit 113 is turned off and the second switch circuit 114 is turned on, so that the power consumption of the coil of the first relay K1 and the coil of the second relay K2 is reduced while the normal working of the first relay K1 and the second relay K2 is kept, and energy is saved. As a preferred embodiment, the resistances of the resistor R1 and the resistor R2 are both 51Ω, and the user may select the resistors R1 and R2 with other resistances according to the actual requirement, which is not limited herein.
As shown in fig. 2, in some preferred embodiments, the first switch circuit 113 includes an enhancement NMOS transistor Q1, where a drain (pin 3) of the enhancement NMOS transistor Q1 is connected to one end of the coil of the first relay K1 and one end of the coil of the second relay K2, a source (pin 2) is connected to the GND terminal, and a gate (pin 1) is a control signal input terminal and is connected to the control circuit 12; the second switch circuit 114 includes an enhancement NMOS Q2, where a drain (pin 3) of the enhancement NMOS Q2 is connected to the other end of the resistor R1 and the other end of the resistor R2, a source (pin 2) is connected to the GND end, and a gate (pin 1) is a control signal input end and connected to the control circuit. The first switch circuit 113 and the second switch circuit 114 are controlled to be turned on and off by controlling the on and off of the enhancement NMOS transistors Q1 and Q2, functioning as one switch.
In some preferred embodiments, the gate of the enhanced NMOS transistor Q1 is connected to the control circuit 12 through the current limiting resistor R4; the grid electrode of the enhanced NMOS tube Q2 is connected with the control circuit 12 through a current limiting resistor R3. In some preferred embodiments, a resistor R6 is connected between the gate and the source of the enhanced NMOS Q1, and a resistor R5 is connected between the gate and the source of the enhanced NMOS Q2, where the resistors R5 and R6 can avoid the influence of malfunction in the circuit on the relay, and also play a role of voltage division bias.
In some preferred embodiments, one end of the coil of the first relay K1 is connected with a rectifying diode D3 before the first switch circuit 113 is connected; one end of the coil of the second relay K2 is further connected with a rectifying diode D4 before being connected with the first switch circuit 113, so as to control current to flow from the relay to the first switch circuit when the first switch circuit is turned on, and play a role in drainage.
In some preferred embodiments, the electric vehicle charging box further includes an auxiliary power supply circuit 13, where the auxiliary power supply circuit 13 includes an EMI filter circuit 131, an AC/DC conversion circuit 132, and a DC/DC conversion circuit 133, and the EMI filter circuit 131 is connected to the power input terminal 10, and filters the current transmitted through the power input terminal 10 and transmits the filtered current to the AC/DC conversion circuit 132 to output a 12V direct current to the execution driving circuit 11 and the DC/DC conversion circuit 133, and the DC/DC conversion circuit 133 continues to convert the 12V direct current into a 5V/3.3V direct current and outputs the 5V/3.3V direct current to the control circuit 12. The AC/DC conversion circuit 132 outputs a direct current of 12V to the execution driving circuit 11 and the DC/DC conversion circuit 133, supplies power to the first relay K1 and the second relay K2 in the execution driving circuit 11, and the DC/DC conversion circuit 133 outputs a direct current of 5V/3.3V to the control circuit 12 to ensure the normal operation of the control circuit 12.
In some preferred embodiments, the electric vehicle charging box further comprises an a-type leakage sensor 14, and the power supply input terminal 10 is connected with the execution driving circuit 11, the auxiliary power supply circuit 13 and the control circuit 12 through the a-type leakage sensor 14. In some preferred embodiments, the control circuit comprises a control guiding circuit, a data acquisition circuit, a man-machine interface and an action protection circuit, wherein the control guiding circuit is powered by the AC/DC conversion circuit, and the man-machine interface is powered by the DC/DC conversion circuit, so that the normal operation of the control circuit is ensured; the data acquisition circuit is connected with the A-type leakage transformer and the execution driving circuit, and when the A-type leakage transformer detects that the circuit has leakage, signals are sent to the data acquisition circuit in the control circuit, so that the control circuit controls the execution driving circuit to be turned off, and charging is stopped.
As shown in fig. 3, in some preferred embodiments, a diode D1 is connected in parallel to the coil of the first relay K1, where the anode of the diode D1 is connected to the 1 st pin and the cathode is connected to the 2 nd pin; and a diode D2 is connected in parallel with the coil of the second relay K2, and the positive electrode of the diode D2 is connected with the 1 st pin and the negative electrode is connected with the 2 nd pin. Diodes D1 and D2 protect the first and second relays.
The control circuit is used for controlling the first switch circuit and the second switch circuit to be closed, and when a vehicle has a charging requirement, the control relay firstly controls the first switch circuit to be conducted so that the voltage at two ends of the relay coil reaches a starting requirement; after a certain time, the second switch is controlled to be turned on, and then the first switch is controlled to be turned on, so that the voltage at two ends of the relay coil is reduced, and the relay coil can still work normally, so that the power consumption of the relay coil is reduced.
The technical principle of the present invention is described above in connection with the specific embodiments. The description is only intended to explain the principles of the invention and should not be construed in any way as limiting the scope of the invention, but rather as merely one of the embodiments of the invention shown in the drawings, without being limited to the actual construction. Other embodiments of the invention will be apparent to those skilled in the art from consideration of this specification without undue burden.

Claims (8)

1. The utility model provides an electric automobile charging box, includes a power input end, a power output end, one connect in the execution drive circuit between shown power input end and the power output end and one with execution drive circuit connects in order to output control signal to execution drive circuit's control circuit, its characterized in that:
the execution driving circuit comprises a relay circuit, a voltage-dividing and current-limiting circuit, a first switching circuit and a second switching circuit, wherein the relay circuit comprises a first relay and a second relay, a contact group of the first relay and a contact group of the second relay are connected between the power input end and the power output end, one ends of coils of the first relay and the second relay are connected with the input end of the voltage-dividing and current-limiting circuit and the first switching circuit, and the other ends of coils of the first relay and the second relay are connected with a direct current power supply; the output end of the voltage-dividing and current-limiting circuit is connected with a second switch circuit;
the voltage-dividing and current-limiting circuit comprises a resistor R1 and a resistor R2, wherein one end of the resistor R1 is connected with one end of a coil of the first relay, and the other end of the resistor R1 is connected with the second switching circuit; one end of the resistor R2 is connected with one end of a coil of the second relay, and the other end of the resistor R2 is connected with the second switch circuit;
one end of the coil of the first relay is connected with a rectifying diode D3 before being connected with the first switching circuit; one end of the coil of the second relay is also connected with a rectifier diode D4 before being connected with the first switch circuit;
the control circuit is used for outputting control signals to the first switch circuit and the second switch circuit and controlling the first switch circuit and the second switch circuit to be closed respectively; when the first switch circuit is conducted, the voltages at the two ends of the first relay and the second relay coil are in a higher level; when the first switch circuit is turned off and the second switch circuit is turned on, the voltage at two ends of the first relay and the second relay coil is in a lower level due to the action of the voltage dividing and current limiting circuit.
2. The electric vehicle charging box according to claim 1, wherein the first switch circuit comprises an enhanced NMOS transistor Q1, a drain electrode of the enhanced NMOS transistor Q1 is connected to one end of the coil of the first relay and one end of the coil of the second relay, a source electrode is connected to the GND terminal, and a gate electrode is a control signal input terminal and connected to the control circuit;
the second switch circuit comprises an enhanced NMOS tube Q2, the drain electrode of the enhanced NMOS tube Q2 is connected with the other end of the resistor R1 and the other end of the resistor R2, the source electrode is connected with the GND end, and the grid electrode is a control signal input end and is connected with the control circuit.
3. The electric vehicle charging box according to claim 2, wherein the gate of the enhanced NMOS Q1 is connected to the control circuit through a current limiting resistor R4; the grid electrode of the enhanced NMOS tube Q2 is connected with a control circuit through a current limiting resistor R3.
4. The electric vehicle charging box according to claim 3, wherein a resistor R6 is connected between the gate and the source of the enhanced NMOS Q1, and a resistor R5 is connected between the gate and the source of the enhanced NMOS Q2.
5. The electric vehicle charging box according to claim 1, wherein the resistances of the resistor R1 and the resistor R2 are each 51Ω.
6. The electric vehicle charging box according to claim 1, further comprising an auxiliary power supply circuit, wherein the auxiliary power supply circuit comprises an EMI filter circuit, an AC/DC converter circuit, and a DC/DC converter circuit, the EMI filter circuit is connected to the power input terminal, and filters the current transmitted from the power input terminal and transmits the filtered current to the AC/DC converter circuit to output 12V direct current to the execution drive circuit and the DC/DC converter circuit, and the DC/DC converter circuit continues to convert the 12V direct current into 5V/3.3V direct current and outputs the 5V/3.3V direct current to the control circuit.
7. The electric vehicle charging box of claim 6, further comprising an a-type leakage sensor, wherein a power input terminal is connected with the execution driving circuit, the auxiliary power supply circuit and the control circuit through the a-type leakage sensor.
8. The electric vehicle charging box according to claim 1, wherein a diode D1 is connected in parallel to the coil of the first relay; the coil of the second relay is connected with a diode D2 in parallel.
CN201710112831.1A 2017-02-28 2017-02-28 Electric automobile charging box Active CN106799972B (en)

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CN106799972B true CN106799972B (en) 2023-06-27

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CN113611223A (en) * 2021-08-16 2021-11-05 珠海锐拓显示技术有限公司 Display device

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Publication number Priority date Publication date Assignee Title
WO2008142824A1 (en) * 2007-05-18 2008-11-27 Panasonic Corporation Relay driving circuit and battery pack using same
JP2014007824A (en) * 2012-06-22 2014-01-16 Suzuki Motor Corp Power supply device for vehicle
CN103825146A (en) * 2012-11-19 2014-05-28 重庆盾之王实业有限公司 Household electric appliance electric leakage protection socket
CN204578184U (en) * 2015-02-06 2015-08-19 北京极联客科技有限公司 A kind of AC adapter
CN205304229U (en) * 2015-12-24 2016-06-08 芜湖美智空调设备有限公司 Relay control protection electric circuit and tame electric installation
CN206615084U (en) * 2017-02-28 2017-11-07 深圳巴斯巴科技发展有限公司 A kind of charging electric vehicle box

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