CN112389253A - Charging pile plug self-adaption and charging safety protection circuit and application method thereof - Google Patents
Charging pile plug self-adaption and charging safety protection circuit and application method thereof Download PDFInfo
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- CN112389253A CN112389253A CN202011383072.0A CN202011383072A CN112389253A CN 112389253 A CN112389253 A CN 112389253A CN 202011383072 A CN202011383072 A CN 202011383072A CN 112389253 A CN112389253 A CN 112389253A
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- voltage
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- main control
- plug
- control module
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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
-
- 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
-
- 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
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/047—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using a temperature responsive switch
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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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Protection Of Static Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A charging pile plug self-adaption and charging safety protection circuit and an application method thereof comprise an identification circuit arranged on a charging pile and an interface circuit arranged on a charging adapter plug; the interface circuit comprises a temperature sensor NTC and a capacitor or a voltage stabilizing diode connected with the temperature sensor NTC in parallel; the voltage output by the first output module is output to the NTC, the main control module collects initial voltage through the ADC, automatically identifies the type of the charging adapter plug and outputs correct charging current information which can be provided to a vehicle end, so that the charging plug is prevented from being overloaded, and charging safety is ensured; the second output module outputs a second voltage to the voltage stabilizing diode, and the temperature rise range of the charging adapter plug is monitored by detecting the change of the voltage value, so that the working temperature during charging is ensured to be within a safety range, and the charging safety is ensured.
Description
Technical Field
The invention relates to the field of charging piles, in particular to a charging pile plug self-adaption and charging safety protection circuit and an application method thereof.
Background
With the development of society and the popularization of national policies, a charging device of an electric vehicle is equipment for charging a battery of the electric vehicle, the electric vehicle can be charged by a fixed charging pile or a portable charging device at present, specifications of a charging adapter plug are various according to the current situation, and if the charging adapter plug is connected for charging under the condition that the specification of the charging adapter plug is not matched with that of the charging pile, the problem of overload of charging current is caused, and the problem of charging safety is caused; in addition, because the charging adapter plug is not inserted well or the contact is poor, heating can be generated during charging, and if the charging adapter plug is not controlled, adverse consequences such as damage of a charging product can be caused.
Disclosure of Invention
In order to solve the problems, the technical scheme provides a charging pile plug self-adaptation and charging safety protection circuit, which prevents the problem of damage to a charging product caused by overload or heating.
In order to achieve the purpose, the technical scheme is as follows:
a charging pile plug self-adaption and charging safety protection circuit comprises an identification circuit arranged on a charging gun and an interface circuit arranged on a charging adapter plug;
the interface circuit comprises a temperature sensor NTC and a capacitor or a voltage stabilizing diode connected with the temperature sensor NTC in parallel;
when the temperature sensor NTC is connected with the voltage stabilizing diode in parallel, the identification circuit comprises a main control module, a first output module, a second output module and a switch module, wherein the first output module is connected to the temperature sensor NTC and the main control module so as to calculate the resistance value of the temperature sensor NTC according to the voltage value output by the first output module, the second output module is connected with the voltage stabilizing diode through the switch module, and the voltage stabilizing diode is also connected with the main control module;
or when the temperature sensor NTC is connected with the capacitor in parallel, the identification circuit comprises a main control module which is connected with the capacitor to output pulse signals to test the charging time of the capacitor and then output voltage to calculate the resistance value of the temperature sensor NTC.
The beneficial effect of this application does:
1. the automatic adapting plug prevents the plug from overloading, in the initial state of electrification work, the main control module automatically identifies the type of the connected charging adapting plug through the voltage value input by the detection circuit, and the main control module outputs correct available charging current information to the vehicle end so as to prevent the charging adapting plug from overloading and ensure the charging safety.
2. The automatic adapting plug prevents the plug from overheating: under the condition that the temperature is abnormally increased due to the fact that the plug is not inserted well or due to poor contact of the plug and the like, the temperature control switch is started to work, the voltage collected by the main control module changes at the moment, and therefore the fact that the temperature of the current charging adapter plug is too high is judged, and load output is cut off. Therefore, the problems of damage of the charging product and the like caused by overload or heating are avoided.
In some embodiments, the first output module comprises a first voltage, the second output module comprises a second voltage, and the switching module comprises MOS transistors Q1, Q2, and Q3;
the first voltage with MOS pipe Q1's source electrode and gate connection, the drain electrode with interface circuit connects, first voltage still with MOS pipe Q2's source electrode is connected, drain electrode ground connection, the second voltage with MOS pipe Q3's source electrode is connected, drain electrode ground connection, MOS pipe Q1's drain electrode, MOS pipe Q2's gate and MOS pipe Q3's gate all with main control module connects.
In some embodiments, the voltage value of the first voltage is less than the load voltage value of the zener diode, and the voltage value of the second voltage is greater than the load voltage value of the zener diode.
In some embodiments, the master control module is connected to the capacitor through a resistor R8, and the master control module is further connected to the capacitor through a resistor R9.
The application also provides a charging gun plug identification method, based on the charging pile plug self-adaption and charging safety protection circuit, the detection method comprises the following steps:
connecting the charging adapter plug with the charging pile;
after connection, the first voltage is grounded through the temperature sensor, the main control module detects the initial voltage value of the NTC through the signal ADC according to the ohm law, and the type of the charging adapter plug is automatically identified;
identifying the maximum load current which can be borne by the charging adapter plug;
the charging pile outputs correct available charging current information to a vehicle end;
the main control module outputs a control signal, the second voltage switches on the voltage stabilizing diode, the main control module detects the current voltage value of the voltage stabilizing diode through the signal ADC according to the ohm's law, and the temperature rise range of the temperature sensor NTC is confirmed through the difference change of the current voltage value and the initial voltage value;
and if the working temperature value exceeds the temperature rise range, stopping charging, and otherwise, normally charging.
In some embodiments, the voltage value of the first voltage is less than the load voltage value of the zener diode, and the voltage value of the second voltage is greater than the load voltage value of the zener diode.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a schematic flow diagram of an embodiment of the present invention;
FIG. 2 is a first schematic circuit diagram according to an embodiment of the present invention;
FIG. 3 is a first equivalent circuit diagram of the non-conductive switch module of FIG. 2;
FIG. 4 is a second equivalent circuit diagram of the switch module of FIG. 2;
fig. 5 is a circuit structure diagram of the second embodiment of the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 5, in a first embodiment, a charging pile plug self-adapting and charging safety protection circuit includes an identification circuit disposed on a charging gun and an interface circuit disposed on a charging adapter plug;
the interface circuit comprises a temperature sensor NTC and a voltage stabilizing diode connected with the temperature sensor NTC in parallel;
when the temperature sensor NTC is connected with the voltage stabilizing diode in parallel, the identification circuit comprises a main control module, a first output module, a second output module and a switch module, wherein the first output module is connected to the temperature sensor NTC and the main control module so as to calculate the resistance value of the temperature sensor NTC according to the voltage value output by the first output module, the second output module is connected with the voltage stabilizing diode through the switch module, and the voltage stabilizing diode is also connected with the main control module;
the design of the application is as follows, when the first output module outputs, the second output module does not output at the moment, and therefore the voltage output by the first output module is output to the NTC (negative temperature coefficient) of the temperature sensor, and the formula can be known according to ohm's law
Therefore, the main control module collects the initial voltage value V1 of the NTC, automatically identifies the type of the charging adapter plug, identifies the maximum load current borne by the charging adapter plug and outputs correct available charging current information to the vehicle end; under the condition that the switch module is conducted, the first output module is grounded, the second output module outputs to the voltage stabilizing diode, and the formula can be known according to ohm's law
Therefore, the main control module can detect the voltage value V2 of the voltage-stabilizing diode, the change of the voltage value V2 and the initial voltage value V1 to detect the temperature rise range of the charging adapter plug, and when the working temperature exceeds the range, the charging is stopped, so that the temperature reliability is ensured.
In the first embodiment, the first output module includes a first voltage VCC1, the second output module includes a second voltage VCC2, and the switch module includes a MOS transistor Q1, a MOS transistor Q2, and a MOS transistor Q3;
the first voltage is connected with the source and the gate of the MOS transistor Q1, the drain is connected with the interface circuit, the first voltage is further connected with the source of the MOS transistor Q2, the drain is grounded, the second voltage is connected with the source of the MOS transistor Q3, the drain is grounded, and the drain of the MOS transistor Q1, the gate of the MOS transistor Q2 and the gate of the MOS transistor Q3 are all connected with the main control module;
specifically, in the case that the switch module is not conductive, as shown in fig. 3, the first voltage VCC1 is preferably 3.3V, and the zener diode D1 is preferably 3.6V, such that the voltage of the first voltage VCC1 is not sufficient to turn on the zener diode D1, and thus the first voltage VCC1 supplies power to the temperature sensor NTC through the resistors R5, R6, and R4, and the main control module can detect the initial voltage value V1 of the temperature sensor NTC through the signal ADC.
Specifically, when the main control module sends a signal at an IO port, each MOS transistor is turned on, as shown in fig. 2 and fig. 4, which are equivalent, as shown in fig. 4, the first voltage VCC1 is grounded through the resistor R5, the voltage of the second voltage VCC2 is preferably 5V, and the zener diode D2 can be turned on, the main control module detects the voltage value V2 of the zener diode D2 through the signal ADC, detects the temperature rise range of the charging adaptor plug through the change of the voltage value, and ensures that the working temperature during charging is within a safe range, so as to ensure the charging safety.
In some embodiments, the voltage value of the first voltage is smaller than the load voltage value of the zener diode, the voltage value of the second voltage is larger than the load voltage value of the zener diode, and the test index needs to be separately tested by two different voltage values.
In a second embodiment, when the NTC is connected in parallel with the capacitor, the identification circuit includes a main control module, and the main control module is connected to the capacitor to output a pulse signal to test the charging time of the capacitor and then output a voltage to calculate the resistance of the NTC.
In some embodiments, the main control module is connected to the capacitor through a resistor R8, and is further connected to the capacitor through a resistor R9, and the main control module outputs a pulse signal to test the charging time of the capacitor, determine the capacity of the capacitor, and then outputs a stable voltage to measure the resistance of the NTC, thereby determining the type of the charging adaptor plug.
The application also provides a charging gun plug identification method, based on the charging pile plug self-adaption and charging safety protection circuit, the detection method comprises the following steps:
s1, connecting the charging adapter plug with the charging pile;
s2, after connection, the first voltage is grounded through the temperature sensor, and the main control module is according to the formula
The initial voltage value V1 of the NTC of the temperature sensor is detected through the signal ADC, the type of the charging adapter plug is automatically identified, the maximum load current borne by the charging adapter plug is identified, and correct available charging current information is output to a vehicle end;
s3, the main control module outputs control signal, the second voltage conducts the voltage stabilizing diode, the main control module according to formula
Detecting the voltage value V2 of the voltage-stabilizing diode, the voltage value V2 and the change of the initial voltage value V1 through the signal ADC to detect the temperature rise range of the charging adapter plug;
and S4, if the working temperature value exceeds the temperature rise range, disconnecting and stopping charging, otherwise, normally charging.
In some embodiments, the voltage value of the first voltage is less than the load voltage value of the zener diode, and the voltage value of the second voltage is greater than the load voltage value of the zener diode.
The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not intended to limit the scope of the present application, which is within the scope of the present application, except that the same or similar principles and basic structures as the present application may be used.
Claims (6)
1. The utility model provides a fill electric pile plug self-adaptation and charging safety protection circuit which characterized in that: the charging adapter plug comprises an identification circuit arranged on a charging pile and an interface circuit arranged on the charging adapter plug;
the interface circuit comprises a temperature sensor NTC and a capacitor or a voltage stabilizing diode connected with the temperature sensor NTC in parallel;
when the temperature sensor NTC is connected with the voltage-stabilizing diode in parallel, the identification circuit comprises a main control module, a first output module, a second output module and a switch module, wherein the first output module is connected to the temperature sensor NTC and the main control module, the second output module is connected with the voltage-stabilizing diode through the switch module, and the voltage-stabilizing diode is also connected with the main control module;
or when the temperature sensor NTC is connected with the capacitor in parallel, the identification circuit comprises a main control module which is connected with the capacitor.
2. The charging pile plug self-adaption and charging safety protection circuit of claim 1, characterized in that: the first output module comprises a first voltage, the second output module comprises a second voltage, and the switch module comprises a MOS transistor Q1, a MOS transistor Q2 and a MOS transistor Q3;
the first voltage with MOS pipe Q1's source electrode and gate connection, the drain electrode with interface circuit connects, first voltage still with MOS pipe Q2's source electrode is connected, drain electrode ground connection, the second voltage with MOS pipe Q3's source electrode is connected, drain electrode ground connection, MOS pipe Q1's drain electrode, MOS pipe Q2's gate and MOS pipe Q3's gate all with main control module connects.
3. The charging pile plug self-adaption and charging safety protection circuit of claim 2, characterized in that: the voltage value of the first voltage is smaller than the load voltage value of the voltage stabilizing diode, and the voltage value of the second voltage is larger than the load voltage value of the voltage stabilizing diode.
4. The charging pile plug self-adaption and charging safety protection circuit of claim 1, characterized in that: the main control module is connected with the capacitor through a resistor R8, and is also connected with the capacitor through a resistor R9.
5. A charging pile plug self-adaption method is characterized by comprising the following steps: the charging pile plug self-adaption and charging safety protection circuit based on any one of claims 1 to 4, wherein the detection method comprises the following steps:
connecting the charging adapter plug with the charging pile;
after connection, the main control module acquires the initial voltage of the NTC of the charging adapter plug temperature sensor and automatically identifies the type of the charging adapter plug;
identifying the maximum load current which can be borne by the charging adapter plug;
the charging pile outputs correct available charging current information to a vehicle end;
the main control module outputs a control signal, the second voltage switches on the voltage stabilizing diode, the main control module acquires the current voltage of the voltage stabilizing diode, and the temperature rise range of the temperature sensor NTC is confirmed by the difference change of the current voltage and the initial voltage;
and if the working temperature value exceeds the temperature rise range, disconnecting and stopping charging, otherwise, normally charging.
6. The charging gun plug identification method according to claim 5, wherein: the voltage value of the first voltage is smaller than the load voltage value of the voltage stabilizing diode, and the voltage value of the second voltage is larger than the load voltage value of the voltage stabilizing diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011383072.0A CN112389253A (en) | 2020-12-01 | 2020-12-01 | Charging pile plug self-adaption and charging safety protection circuit and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011383072.0A CN112389253A (en) | 2020-12-01 | 2020-12-01 | Charging pile plug self-adaption and charging safety protection circuit and application method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112389253A true CN112389253A (en) | 2021-02-23 |
Family
ID=74604018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011383072.0A Pending CN112389253A (en) | 2020-12-01 | 2020-12-01 | Charging pile plug self-adaption and charging safety protection circuit and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112389253A (en) |
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2020
- 2020-12-01 CN CN202011383072.0A patent/CN112389253A/en active Pending
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Inventor after: Hong Dengyue Inventor after: Huang Xingjian Inventor before: Huang Xingjian Inventor before: Hong Dengyue |
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