CN110901429A - Adjustable charging device with abnormal connection detection function and control method - Google Patents
Adjustable charging device with abnormal connection detection function and control method Download PDFInfo
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- CN110901429A CN110901429A CN201911198185.0A CN201911198185A CN110901429A CN 110901429 A CN110901429 A CN 110901429A CN 201911198185 A CN201911198185 A CN 201911198185A CN 110901429 A CN110901429 A CN 110901429A
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- power supply
- charging
- temperature
- sensitive
- control box
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
- B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
-
- 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
- Y02T90/12—Electric charging stations
-
- 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 adjustable charging device with an abnormal connection detection function and a control method, wherein the adjustable charging device comprises a power supply plug, a control box and a vehicle charging connector, wherein a temperature-sensitive on-off device is arranged in the power supply plug and is used for sensing the internal temperature of the power supply plug and switching off the power supply plug when the temperature is abnormal; the control box is used for calculating the cutting-off times of the temperature-sensitive on-off device, adjusting the pulse width of a guide signal which can be identified by the electric automobile, and receiving and adjusting the charging current by the electric automobile; the vehicle charging connector is used for transmitting an abnormal connection signal to the electric automobile and transmitting a signal fed back by the electric automobile to the control box. The invention overcomes the defect that the temperature-sensitive on-off device is frequently switched when the power supply plug is badly plugged, can realize continuous charging under the allowable condition, and can cut off the circuit when the condition can not be improved, thereby effectively ensuring the safety of charging facilities.
Description
Technical Field
The present invention relates to an electric vehicle charging device and a control method thereof, and more particularly, to an adjustable charging device with an abnormal connection detection function and a control method thereof.
Background
Domestic electric automobile exchanges charging device because of its convenient to carry, can charge at any time and anywhere and be prepared for favour, including power supply plug, charging cable, control box, charging connector and annex, on domestic power supply socket was received to the power supply plug, charging connector received electric automobile's whole car charge controller. The charging principle of the household electric automobile alternating current charging device is as follows: when the vehicle connector is connected with the electric vehicle (the signal of the vehicle connection signal port in the vehicle connector is normal), and the power supply plug is connected with the power supply side power grid to complete power supply, the control box can generate a rectangular pulse signal specified in normal charging, the rectangular pulse signal is coupled to a vehicle-mounted charger inside the electric vehicle through a cable and the power supply connection signal port in the vehicle charging connector, and the vehicle-mounted charger determines whether to charge and the magnitude of charging current according to the magnitude and the pulse width of the rectangular pulse signal. There is the uncertain safety risk of connection state in the charging process, mainly include:
(1) the standard of execution for domestic power supply sockets is GB 2099.1. The three-hole charging socket in the standard range adopts a reed structure, and multiple times of plugging easily cause deformation of reeds, so that contact resistance at the plugging position of the plug is increased, temperature rise is too fast, and ablation risk is caused;
(2) in the case of a vehicle connector, connection abnormality may be caused by environmental influences such as dust, rain, and the like.
At present, a temperature-sensitive on-off device is arranged in a plug to control the risk of overhigh temperature, but the service life of the temperature-sensitive on-off device is limited (generally about 10000 times), under specific conditions, for example, the plug and the socket are badly plugged due to the environmental influences of sand, dust, rain and the like, when a large charging current is not loaded, the temperature-sensitive on-off device can be always in a state of switching on and off continuously, when nobody is in time, the frequent switching of the temperature-sensitive on-off device causes the reduction of the service life of the temperature-sensitive on-off device, and a charging circuit is frequently in a state of switching on and off, so that a large safety. Therefore, a charging device capable of avoiding frequent switching of the temperature-sensitive on-off device and ensuring charging safety is needed.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide an adjustable charging device with an abnormal connection detection function and a control method, which solve the problem that a temperature-sensitive on-off device is frequently switched when a plug and a socket are plugged badly at present and effectively ensure the safety of a charging facility.
The technical scheme is as follows: the invention relates to an adjustable charging device with an abnormal connection detection function, which comprises a power supply plug connected with an alternating current power supply, a control box and a vehicle charging connector connected with an electric automobile;
the power supply plug is used for transmitting electric energy when the electric automobile is charged and providing power for the control box, and the temperature-sensitive on-off device is arranged in the power supply plug and used for sensing the internal temperature of the power supply plug and cutting off the power supply plug when the temperature is abnormal;
the control box is used for calculating the cut-off times of the temperature-sensitive on-off device and transmitting the cut-off times to the control unit, generating a power supply connection signal sent to the electric automobile, and adjusting the positive half-cycle pulse width of the power supply connection signal according to the cut-off times so as to reduce the charging current;
and the vehicle charging connector is used for transmitting the abnormal signal sent by the control box to the electric automobile and transmitting a signal fed back by the electric automobile to the control box.
Furthermore, the control box comprises a control unit, a counting module, a power supply connection signal regulator and a contactor, wherein the power supply connection signal regulator adjusts the positive half-cycle pulse width of the power supply connection signal under the control of the control unit, and the contactor is arranged in the charging loop and is controlled by the control unit and can cut off the charging loop.
Furthermore, the counting module comprises a counter and a comparator, the counter is used for calculating the cutting-off times of the temperature-sensitive on-off device, and the comparator is used for comparing the value of the counter with the value of a set value and outputting the result to the control unit.
Furthermore, the temperature-sensitive on-off device in the power supply plug is arranged in a live wire and zero line loop of the power supply plug, an independent circuit is arranged in the power supply plug to supply power to the control box, and when the temperature-sensitive on-off device is switched off, continuous power supply of an internal power supply of the control box is not influenced.
Furthermore, the temperature-sensitive on-off device in the power supply plug is arranged outside a live wire and zero line loop of the power supply plug, the control box supplies power through the charging loop, and when the temperature-sensitive on-off device is disconnected, continuous power supply of an internal power supply of the control box is not influenced.
The control method of the adjustable charging device is based on the device and comprises the following steps:
(1) the counting module calculates the cutting times of the temperature-sensitive on-off device and sends the cutting times to the control unit;
(2) the control unit controls the power supply connection signal regulator, the power supply connection signal regulator reduces the positive half-cycle pulse width of the generated square wave signal along with the increase of the cutting-off times, and transmits the square wave signal to the whole vehicle charging controller through the vehicle charging connector, so that the current of the charging loop is gradually reduced.
Further, the method also comprises the following steps: when the positive half-cycle pulse width of the square wave signal is reduced to a set value, the whole vehicle charging controller sends a charging stopping instruction, and the contactor is switched off after the control unit receives the instruction.
Has the advantages that: the invention can ensure the continuous work of the control box when the power supply plug is plugged badly, and the control box adjusts the positive half-cycle pulse width of the sent square wave signal by judging the switching times of the temperature-sensitive on-off device, so that the electric automobile automatically adjusts the current of the charging loop, and the smaller the pulse width is, the smaller the current is until the balance of the current and the temperature rise is maintained, thereby realizing the continuous charging. If the positive half-cycle pulse width of the square wave signal is small enough, namely, when the condition can not be improved, the charging circuit is cut off, the service life of the temperature-sensitive on-off device is prolonged, and meanwhile, the charging risk is reduced.
Drawings
FIG. 1 is a view showing a construction of a connection in embodiment 1;
FIG. 2 is a connection structural view of embodiment 2;
fig. 3 is a schematic diagram of a power supply connection confirmation signal at the time of temperature abnormality.
Detailed Description
The device of the invention provides 2 embodiments, which comprise a power supply plug, a control box and a vehicle charging connector. The power supply plug, the control box and the vehicle charging connector are connected through a cable, and the vehicle charging connector is connected to a whole vehicle charging controller of the electric automobile in a coupling mode. The vehicle charging connector comprises a vehicle connection signal port (CC) and a power supply connection signal port (CP). The power supply plug, the power supply connection signal regulator in the control box, the vehicle connection signal port (CC) and the power supply connection signal port (CP) in the vehicle charging connector and the whole vehicle charging connector on the electric automobile all conform to the regulations in GB/T18487.1-2015. In fig. 1 to 2, L denotes a live wire, N denotes a neutral wire, and PE denotes a ground wire.
Example 1:
the connection mode of embodiment 1 is as shown in fig. 1, and includes a power supply plug, a control box, a vehicle charging connector and a connected cable, where the power supply plug is connected to an ac socket, the vehicle charging connector is coupled to a vehicle charging controller of an electric vehicle, and the vehicle charging connector includes a vehicle connection signal port (CC) and a power supply connection signal port (CP) in a standard configuration. The temperature-sensitive on-off device is arranged in the power supply plug, belongs to a mechanical change-over switch along with temperature change, and is switched off when the temperature is abnormal and switched on when the temperature is recovered to be normal. The temperature-sensitive on-off device is connected in the charging loop in series, and when the temperature rise is abnormal due to the fact that the power supply plug and the socket are abnormally plugged in the charging process of the electric automobile, the power supply loop is actively cut off to interrupt or stop charging. And a circuit connected with the control box is arranged on one side of the temperature-sensitive on-off device close to the socket and is used for independently supplying power to the control box. That is, if the power supply plug is connected with the power supply, the control box keeps the working state all the time. The control box is a control unit of the whole alternating current charging device and comprises a control unit, a counting module, a power supply connection signal regulator and a contactor. The counting module is connected with the temperature-sensitive on-off device and comprises a comparator and a counter, the comparator is connected with the control unit and used for counting the cutting-off times of the temperature-sensitive on-off device, and the comparator is used for comparing the value of the counter with the set value and outputting the result to the control unit. The counting module is connected with the control unit, and the control unit is connected with the power supply connection signal regulator and the vehicle connection signal port through a resistor. The power supply connection signal regulator is connected with the power supply connection signal port and used for generating and regulating a power supply connection confirmation signal, the power supply connection confirmation signal is a standard square wave signal, the power supply connection signal regulator is controlled by the control unit and regulates the power supply connection confirmation signal according to the counting value, the more the temperature-sensitive on-off device is cut off due to abnormal temperature, the larger the counting value is, the smaller the positive half-cycle pulse width of the corresponding power supply connection square wave signal is, and the power supply connection confirmation signal is shown in figure 3. The signal is transmitted to a whole vehicle charging controller of the electric vehicle through a power supply connection signal port of the charging connector, the electric vehicle automatically adjusts the current of the charging loop according to the pulse width of the received square wave signal, and the smaller the pulse width is, the smaller the charging current is, and the charging is continued until the balance of the current and the temperature rise is maintained. When the temperature of the power supply plug/socket is abnormal continuously and the positive half-cycle pulse width of the square wave signal is reduced to a set value, the whole vehicle charging controller sends a charging stopping instruction, and the control unit cuts off the contactor after receiving the instruction and stops charging.
Embodiment 2 is different from embodiment 1 in that the temperature-sensitive on-off device is not connected in series in the charging circuit and is connected to the counting module through a control line, as shown in fig. 2. The temperature-sensitive on-off device does not control the on-off of the charging loop, and independently provides a switching value signal generated due to temperature abnormity for the counting module. The control box supplies power through the charging loop, and when the temperature-sensitive on-off device is disconnected, the power supply of an internal power supply of the control box is not influenced. Other connection modes and working principles are the same as those of embodiment 1, and are not described again.
The control method of the present embodiment is based on embodiment 1 or 2, and specifically includes:
(1) when the temperature is abnormal, the temperature-sensitive on-off device starts to switch on and off. The counting module calculates the cutting times of the temperature-sensitive on-off device and sends the cutting times to the control unit;
(2) the control unit controls the connection signal regulator, the positive half-cycle pulse width of the generated square wave signal is reduced along with the increase of the cutting-off times by the connection signal regulator, and the square wave signal is sent to the whole vehicle charging controller.
The whole vehicle charging controller is positioned on the electric vehicle, the charging current is reduced according to the square wave signal for reducing the positive half-cycle pulse width, after the charging current is reduced to a certain amount and reaches balance, the temperature of the plug is not increased, the temperature-sensitive on-off device is not cut off, and the charging device can keep small current to continuously charge the vehicle. When the positive half-cycle pulse width of the square wave signal is reduced to a set value, the whole vehicle charging controller sends a charging stopping instruction, and the contactor is switched off after the control unit receives the instruction.
Claims (7)
1. The utility model provides an adjustable charging device with abnormal connection detects function which characterized in that: the charging device comprises a power supply plug connected with an alternating current power supply, a control box and a vehicle charging connector connected with an electric automobile;
the power supply plug is used for transmitting electric energy when the electric automobile is charged and providing power for the control box, and the temperature-sensitive on-off device is arranged in the power supply plug and used for sensing the internal temperature of the power supply plug and cutting off the power supply plug when the temperature is abnormal;
the control box is used for calculating the cut-off times of the temperature-sensitive on-off device and transmitting the cut-off times to the control unit, generating a power supply connection signal sent to the electric automobile, and adjusting the positive half-cycle pulse width of the power supply connection signal according to the cut-off times so as to reduce the charging current;
and the vehicle charging connector is used for transmitting the abnormal signal sent by the control box to the electric automobile and transmitting a signal fed back by the electric automobile to the control box.
2. The adjustable charging device with an abnormal connection detection function according to claim 1, wherein: the control box comprises a control unit, a counting module, a power supply connection signal regulator and a contactor, wherein the power supply connection signal regulator adjusts the positive half-cycle pulse width of the power supply connection signal under the control of the control unit, and the contactor is arranged in a charging loop and is controlled by the control unit and can cut off the charging loop.
3. The adjustable charging device with an abnormal connection detection function according to claim 2, wherein: the counting module comprises a counter and a comparator, the counter is used for calculating the cutting-off times of the temperature-sensitive on-off device, and the comparator is used for comparing the value of the counter with the set value and outputting the result to the control unit.
4. The charging device with an abnormal connection detecting function according to claim 1, characterized in that: the temperature-sensitive on-off device in the power supply plug is connected in series in a live wire and zero line loop of the power supply plug, an independent circuit is arranged in the power supply plug to supply power to the control box, and when the temperature-sensitive on-off device is disconnected, continuous power supply to the control box is not influenced.
5. The charging device with an abnormal connection detecting function according to claim 1, characterized in that: the temperature-sensitive on-off device in the power supply plug is arranged outside a live wire and zero line loop of the power supply plug, and when the temperature-sensitive on-off device is disconnected, the control box is not influenced to continuously supply power.
6. A control method of an adjustable charging device, based on the device of any one of claims 1 to 5, characterized by comprising the following steps:
(1) the counting module calculates the cutting times of the temperature-sensitive on-off device and sends the cutting times to the control unit;
(2) the control unit controls the power supply connection signal regulator, the power supply connection signal regulator reduces the positive half-cycle pulse width of the generated square wave signal along with the increase of the cutting-off times, and transmits the square wave signal to the whole vehicle charging controller of the electric vehicle through the vehicle charging connector, so that the current of the charging loop is gradually reduced.
7. The method of controlling an adjustable charging device according to claim 6, further comprising the steps of: when the positive half-cycle pulse width of the square wave signal is reduced to a set value, the whole vehicle charging controller of the electric vehicle sends a charging stopping instruction, and the contactor is switched off after the control unit receives the instruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911198185.0A CN110901429A (en) | 2019-11-29 | 2019-11-29 | Adjustable charging device with abnormal connection detection function and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911198185.0A CN110901429A (en) | 2019-11-29 | 2019-11-29 | Adjustable charging device with abnormal connection detection function and control method |
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| CN110901429A true CN110901429A (en) | 2020-03-24 |
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| CN201911198185.0A Pending CN110901429A (en) | 2019-11-29 | 2019-11-29 | Adjustable charging device with abnormal connection detection function and control method |
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| CN108649668A (en) * | 2018-06-04 | 2018-10-12 | 南京康尼新能源汽车零部件有限公司 | The temperature control system and its temperature control method of charging device of electric automobile |
| CN110481358A (en) * | 2019-09-16 | 2019-11-22 | 浙江致威电子科技有限公司 | A kind of charging gun assembly and charging method |
| CN211567693U (en) * | 2019-11-29 | 2020-09-25 | 南京康尼新能源汽车零部件有限公司 | Adjustable charging device with abnormal connection detection function |
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2019
- 2019-11-29 CN CN201911198185.0A patent/CN110901429A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08234621A (en) * | 1994-12-28 | 1996-09-13 | Canon Inc | Image heating device using electromagnetic induction |
| CN103977946A (en) * | 2014-05-27 | 2014-08-13 | 深圳市浩能科技有限公司 | Energy-saving heating control method for drying oven of coating machine |
| CN204497757U (en) * | 2014-12-04 | 2015-07-22 | 普天新能源（深圳）有限公司 | Charging circuit and charging system |
| CN104734120A (en) * | 2015-03-12 | 2015-06-24 | 株洲南车时代电气股份有限公司 | Protection and fault detection system and method for fan motor |
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