CN110920453A - Monitoring system for automobile charging device - Google Patents
Monitoring system for automobile charging device Download PDFInfo
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- CN110920453A CN110920453A CN201911241440.5A CN201911241440A CN110920453A CN 110920453 A CN110920453 A CN 110920453A CN 201911241440 A CN201911241440 A CN 201911241440A CN 110920453 A CN110920453 A CN 110920453A
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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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- 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
- B60L53/66—Data transfer between charging stations and vehicles
- B60L53/665—Methods related to measuring, billing or payment
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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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- 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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a monitoring system of an automobile charging device, which comprises an automobile information acquisition unit, an environment information acquisition unit, a gun head temperature acquisition unit, an electronic lock detection unit, an alternating current information acquisition unit, an output information acquisition unit, an insulation detection unit, a control processing unit, a display unit, an alarm unit and a communication unit, wherein the automobile information acquisition unit is used for acquiring the temperature of a gun head; the monitoring system monitors the working state information of the charging device and ensures the safe and reliable work of the charging device. The invention provides a monitoring system for an automobile charging device, which can improve the safety and controllability of the charging device.
Description
Technical Field
The invention belongs to the technical field of charging detection, and particularly relates to a monitoring system for an automobile charging device.
Background
The traditional automobile industry consumes a large amount of fossil energy through years of development. Fossil energy is a non-renewable resource that must be depleted with the mass production of human beings. Meanwhile, the environmental pollution problem is more and more serious due to the large use of fossil energy. In order to weaken excessive dependence on fossil energy and solve the problem of environmental pollution, more and more countries and regions begin to pay attention to the electric automobile industry.
The charging device is an important device for charging an electric automobile, and at present, a fault removing method for the charging device is mainly used for judging the fault reason of the charging device by checking the state of the charging device and analyzing communication data with a vehicle in the charging process on site. This approach is very time and labor intensive. Therefore, by detecting the key data in the operation process of the charging device in real time and giving corresponding measures according to the experience threshold, such as cutting off the output power supply, the safety of the charging equipment can be ensured. And the data uploaded to the background system can also provide reference for judging the state of the charging device through analysis.
The invention provides a monitoring system for an automobile charging device, which is used for collecting various working information and environmental information of the charging device, giving corresponding measures according to experience thresholds, and giving an alarm in time and transparentizing the charging process when the charging device is in an abnormal state.
Disclosure of Invention
The invention provides a monitoring system for an automobile charging device, which can improve the safety and controllability of the charging device.
The invention particularly relates to a monitoring system of an automobile charging device, which comprises an automobile information acquisition unit, an environment information acquisition unit, a gun head temperature acquisition unit, an electronic lock detection unit, an alternating current information acquisition unit, an output information acquisition unit, an insulation detection unit, a control processing unit, a display unit, an alarm unit and a communication unit, wherein the control processing unit is respectively connected with the automobile information acquisition unit, the environment information acquisition unit, the gun head temperature acquisition unit, the electronic lock detection unit, the alternating current information acquisition unit, the output information acquisition unit, the insulation detection unit, the display unit, the alarm unit and the communication unit; the monitoring system monitors the working state information of the charging device and ensures the safe and reliable work of the charging device.
The automobile information acquisition unit acquires automobile battery information, including total battery voltage, battery current, required voltage, highest single battery voltage and battery pack temperature.
The environment information acquisition unit adopts a temperature and humidity integrated sensor to acquire temperature signals and humidity signals of the environment.
And the gun head temperature acquisition unit acquires the temperature of the gun head by adopting a temperature sensor.
The electronic lock detection unit acquires whether the electronic lock is reliably locked or not and acquires feedback signals of locking positions of the power supply interface of the charging device and the vehicle interface.
The power supply interface and the vehicle interface have a locking function, so that accidental disconnection of a charging process is prevented, and when the electronic lock is not reliably locked, the electric automobile or the charging equipment stops charging or does not start charging.
The alternating current information acquisition unit acquires alternating current information comprising alternating current voltage, alternating current and frequency through an alternating current meter.
The output information acquisition unit acquires the output signals of the charging device through a sensor, and the output signals comprise output voltage and output current.
The insulation detection unit collects the insulation resistance between the positive electrode and the ground wire of the charging loop and the insulation resistance between the negative electrode and the ground wire, and takes the smaller value of the two (set as R). When R is more than 500 omega/V, the charging device is in a normal state and can be charged; when R is more than 100 omega/V and less than or equal to 500 omega/V, the charging device is in an abnormal state but can be charged; when R is less than or equal to 100 omega/V, the charging device is in a fault state and charging is not allowed.
The control processing unit adopts a microprocessor, analyzes and judges input information, and controls the working state of the charging device:
judging whether the total voltage of the battery is greater than the lowest output voltage of the charging device and less than the highest output voltage, if so, charging, and if not, not allowing charging;
judging whether the temperature of the battery pack is greater than a battery pack temperature reference value or not, if so, controlling the alarm unit to give an alarm, and displaying that the temperature of the battery pack is high through the display unit;
the method comprises the steps that feedback signals of a power supply interface of a charging device and a locking position of a vehicle interface are acquired by an electronic lock detection unit to judge whether the electronic lock is locked reliably, when the electronic lock is not locked reliably, an electric vehicle or charging equipment should stop charging or not start charging, an alarm unit is controlled to give an alarm, and the display unit displays that the electronic lock is not locked reliably;
judging whether the environment temperature signal acquired by the environment information acquisition unit is greater than an environment temperature alarm value, if so, controlling the alarm unit to give an alarm, and displaying that the environment temperature is high through the display unit; calculating the change rate of the environment temperature signal, judging whether the change rate of the environment temperature signal is greater than the change rate alarm value of the environment temperature signal, if so, controlling the alarm unit to give an alarm, and displaying that the change of the environment temperature is abnormal through the display unit; judging whether the environment humidity signal acquired by the environment information acquisition unit is greater than an environment humidity alarm value, if so, controlling the alarm unit to give an alarm, and displaying that the environment humidity is high through the display unit; calculating the change rate of the environment humidity signal, judging whether the change rate of the environment humidity signal is greater than the change rate alarm value of the environment humidity signal, if so, controlling the alarm unit to give an alarm, and displaying that the environment humidity changes abnormally through the display unit;
judging whether the temperature of the gun head is greater than a gun head temperature alarm value, if so, controlling the alarm unit to give an alarm, and displaying that the temperature of the gun head is high through the display unit; calculating the temperature change rate of the gun head, judging whether the temperature change rate of the gun head is greater than a temperature change rate alarm value of the gun head, if so, controlling the alarm unit to give an alarm, and displaying that the temperature change of the gun head is abnormal through the display unit;
calculating the difference value between the alternating voltage and the alternating rated voltage, judging whether the difference value between the alternating voltage and the alternating rated voltage is greater than the reference value of the difference value between the alternating voltage and the alternating rated voltage, if so, judging whether the difference value between the alternating voltage and the alternating rated voltage is greater than zero, if so, controlling the alarm unit to give an alarm, and displaying the alternating voltage overvoltage through the display unit; if the alternating voltage is not more than zero, the alarm unit is controlled to give an alarm, and the alternating voltage is displayed through the display unit; if the difference value is not greater than the reference value of the alternating voltage difference value, the alternating voltage is normal;
judging whether the alternating current is larger than an alternating current reference value or not, if so, controlling the alarm unit to give an alarm, and displaying the overcurrent of the alternating current through the display unit;
judging whether the output voltage is greater than an output voltage reference value, if so, controlling the alarm unit to give an alarm, and displaying the overvoltage of the output voltage through the display unit;
judging whether the output current is larger than an output current reference value or not, if so, controlling the alarm unit to give an alarm, and displaying the output current overcurrent through the display unit;
taking the smaller value of the insulation resistance between the anode and the ground wire and the insulation resistance between the cathode and the ground wire as an insulation resistance value, judging whether the insulation resistance value is greater than 500 omega/V, and if the insulation resistance value is greater than 500 omega/V, keeping the charging device in a normal state; if the insulation resistance value is not more than 500 omega/V, judging whether the insulation resistance value is less than 100 omega/V, if the insulation resistance value is less than 100 omega/V, the charging device is in a fault state, and charging is not allowed; if not less than 100 Ω/V, the charging device is in an abnormal state, but charging is still possible.
The control processing unit further comprises a storage module and an external input/output interface, the storage module stores information of the monitoring system, the external input/output interface adopts a serial interface, and the monitoring system is connected with external equipment through the serial interface to complete parameter setting and information export of the monitoring system.
The display unit adopts an LCD display screen, and the alarm unit adopts an audible and visual alarm; and the communication unit uploads the information of the monitoring system to a monitoring center and mobile equipment by adopting a wireless communication technology.
Compared with the prior art, the beneficial effects are: the monitoring system collects various working information and environmental information of the charging device, finds abnormal conditions of the charging device in time and gives an alarm, so that the charging process is transparent, and the safety and the reliability of the charging device are improved.
Drawings
Fig. 1 is a schematic structural diagram of a monitoring system of an automobile charging device according to the present invention.
Detailed Description
The following describes in detail a specific embodiment of a monitoring system for a vehicle charging device according to the present invention with reference to the accompanying drawings.
As shown in fig. 1, the monitoring system of the present invention includes an automobile information acquisition unit, an environment information acquisition unit, a gun head temperature acquisition unit, an electronic lock detection unit, an alternating current information acquisition unit, an output information acquisition unit, an insulation detection unit, a control processing unit, a display unit, an alarm unit, and a communication unit, wherein the control processing unit is respectively connected to the automobile information acquisition unit, the environment information acquisition unit, the gun head temperature acquisition unit, the electronic lock detection unit, the alternating current information acquisition unit, the output information acquisition unit, the insulation detection unit, the display unit, the alarm unit, and the communication unit; the monitoring system monitors the working state information of the charging device and ensures the safe and reliable work of the charging device.
The automobile information acquisition unit acquires automobile battery information, including total battery voltage, battery current, required voltage, highest single battery voltage and battery pack temperature.
The environment information acquisition unit adopts a temperature and humidity integrated sensor to acquire temperature signals and humidity signals of the environment.
Along with the increase of the number of times of inserting and pulling the gun head, the looseness of a connecting interface can be caused, poor contact is caused, an electric spark phenomenon is caused during charging, and therefore charging safety accidents are caused. Consequently, need detect the rifle head temperature that charges, ensure when charging that the rifle head temperature that charges appears unusually can detect to the output is charged in the disconnection, guarantees operating personnel safety: and the gun head temperature acquisition unit acquires the temperature of the gun head by adopting a temperature sensor.
The power supply interface and the vehicle interface have a locking function, accidental disconnection in the charging process is prevented, when the electronic lock is not locked reliably, the electric automobile or the charging equipment should stop charging or not start charging, the electronic lock detection unit acquires whether the electronic lock is locked reliably or not, and acquires feedback signals of the locking positions of the power supply interface and the vehicle interface of the charging device.
The alternating current information acquisition unit acquires alternating current information comprising alternating current voltage, alternating current and frequency through an alternating current meter.
The output information acquisition unit acquires the output signals of the charging device through a sensor, and the output signals comprise output voltage and output current.
The insulation detection unit collects insulation resistance between the positive electrode of the charging loop and the ground wire and insulation resistance between the negative electrode of the charging loop and the ground wire.
The control processing unit adopts a microprocessor, analyzes and judges input information, and controls the working state of the charging device:
judging whether the total voltage of the battery is greater than the lowest output voltage of the charging device and less than the highest output voltage, if so, charging, and if not, not allowing charging;
judging whether the temperature of the battery pack is greater than a battery pack temperature reference value or not, if so, controlling the alarm unit to give an alarm, and displaying that the temperature of the battery pack is high through the display unit;
the method comprises the steps that feedback signals of a power supply interface of a charging device and a locking position of a vehicle interface are acquired by an electronic lock detection unit to judge whether the electronic lock is locked reliably, when the electronic lock is not locked reliably, an electric vehicle or charging equipment should stop charging or not start charging, an alarm unit is controlled to give an alarm, and the display unit displays that the electronic lock is not locked reliably;
judging whether the environment temperature signal acquired by the environment information acquisition unit is greater than an environment temperature alarm value, if so, controlling the alarm unit to give an alarm, and displaying that the environment temperature is high through the display unit; calculating the change rate of the environment temperature signal, judging whether the change rate of the environment temperature signal is greater than the change rate alarm value of the environment temperature signal, if so, controlling the alarm unit to give an alarm, and displaying that the change of the environment temperature is abnormal through the display unit; judging whether the environment humidity signal acquired by the environment information acquisition unit is greater than an environment humidity alarm value, if so, controlling the alarm unit to give an alarm, and displaying that the environment humidity is high through the display unit; calculating the change rate of the environment humidity signal, judging whether the change rate of the environment humidity signal is greater than the change rate alarm value of the environment humidity signal, if so, controlling the alarm unit to give an alarm, and displaying that the environment humidity changes abnormally through the display unit; the alarm value of the environment temperature is +50 ℃, and the alarm value of the environment humidity is 95%;
judging whether the temperature of the gun head is greater than a gun head temperature alarm value, if so, controlling the alarm unit to give an alarm, and displaying that the temperature of the gun head is high through the display unit; calculating the temperature change rate of the gun head, judging whether the temperature change rate of the gun head is greater than a temperature change rate alarm value of the gun head, if so, controlling the alarm unit to give an alarm, and displaying that the temperature change of the gun head is abnormal through the display unit;
calculating the difference value between the alternating voltage and the alternating rated voltage, judging whether the difference value between the alternating voltage and the alternating rated voltage is greater than the reference value of the difference value between the alternating voltage and the alternating rated voltage, if so, judging whether the difference value between the alternating voltage and the alternating rated voltage is greater than zero, if so, controlling the alarm unit to give an alarm, and displaying the alternating voltage overvoltage through the display unit; if the alternating voltage is not more than zero, the alarm unit is controlled to give an alarm, and the alternating voltage is displayed through the display unit; if the difference value is not greater than the reference value of the alternating voltage difference value, the alternating voltage is normal;
judging whether the alternating current is larger than an alternating current reference value or not, if so, controlling the alarm unit to give an alarm, and displaying the overcurrent of the alternating current through the display unit;
judging whether the output voltage is greater than an output voltage reference value, if so, controlling the alarm unit to give an alarm, and displaying the overvoltage of the output voltage through the display unit;
and judging whether the output current is greater than the output current reference value, if so, controlling the alarm unit to give an alarm, and displaying the output current overcurrent through the display unit.
Taking the smaller value of the insulation resistance between the anode and the ground wire and the insulation resistance between the cathode and the ground wire as an insulation resistance value, judging whether the insulation resistance value is greater than 500 omega/V, and if the insulation resistance value is greater than 500 omega/V, keeping the charging device in a normal state; if the insulation resistance value is not more than 500 omega/V, judging whether the insulation resistance value is less than 100 omega/V, if the insulation resistance value is less than 100 omega/V, the charging device is in a fault state, and charging is not allowed; if not less than 100 omega/V, the charging device is in an abnormal state, but can be charged;
the control processing unit further comprises a storage module and an external input/output interface, the storage module stores information of the monitoring system, the external input/output interface adopts a serial interface, and the monitoring system is connected with external equipment through the serial interface to complete parameter setting and information export of the monitoring system.
The display unit adopts an LCD display screen, and the alarm unit adopts an audible and visual alarm.
The communication unit adopts wireless communication technology will monitored control system's information upload to surveillance center and mobile device, relevant APP need be installed to the mobile device, the car owner can pass through APP knows the charging process, when charging the appearance unusual, also can in time know to further processing.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A monitoring system of an automobile charging device is characterized by comprising an automobile information acquisition unit, an environment information acquisition unit, a gun head temperature acquisition unit, an electronic lock detection unit, an alternating current information acquisition unit, an output information acquisition unit, an insulation detection unit, a control processing unit, a display unit, an alarm unit and a communication unit, wherein the control processing unit is respectively connected with the automobile information acquisition unit, the environment information acquisition unit, the gun head temperature acquisition unit, the electronic lock detection unit, the alternating current information acquisition unit, the output information acquisition unit, the insulation detection unit, the display unit, the alarm unit and the communication unit; the monitoring system monitors the working state information of the charging device and ensures the safe and reliable work of the charging device.
2. The vehicle charging device monitoring system according to claim 1, wherein the vehicle information acquisition unit acquires vehicle battery information including total battery voltage, battery current, required voltage, maximum cell voltage, and battery pack temperature.
3. The monitoring system of claim 2, wherein the environmental information collection unit collects temperature signals and humidity signals of an environment by using a temperature and humidity integrated sensor; and the gun head temperature acquisition unit acquires the temperature of the gun head by adopting a temperature sensor.
4. The monitoring system for the automobile charging device according to claim 3, wherein the electronic lock detection unit collects whether the electronic lock is locked reliably, and collects feedback signals of locking positions of the charging device power supply interface and the vehicle interface.
5. The monitoring system of claim 4, wherein the ac information acquisition unit acquires ac information including ac voltage, ac current, and frequency via an ac meter; the output information acquisition unit acquires the output signals of the charging device through a sensor, and the output signals comprise output voltage and output current.
6. The monitoring system of claim 5, wherein the insulation detection unit collects insulation resistance between the positive pole and the ground wire and insulation resistance between the negative pole and the ground wire of the charging loop.
7. The monitoring system of claim 6, wherein the control processing unit uses a microprocessor to analyze and judge the input information, and controls the operating state of the charging device to:
judging whether the total voltage of the battery is greater than the lowest output voltage of the charging device and less than the highest output voltage, if so, charging, and if not, not allowing charging;
judging whether the temperature of the battery pack is greater than a battery pack temperature reference value or not, if so, controlling the alarm unit to give an alarm, and displaying that the temperature of the battery pack is high through the display unit;
the method comprises the steps that feedback signals of a power supply interface of a charging device and a locking position of a vehicle interface are acquired by an electronic lock detection unit to judge whether the electronic lock is locked reliably, when the electronic lock is not locked reliably, an electric vehicle or charging equipment should stop charging or not start charging, an alarm unit is controlled to give an alarm, and the display unit displays that the electronic lock is not locked reliably;
judging whether the environment temperature signal acquired by the environment information acquisition unit is greater than an environment temperature alarm value, if so, controlling the alarm unit to give an alarm, and displaying that the environment temperature is high through the display unit; calculating the change rate of the environment temperature signal, judging whether the change rate of the environment temperature signal is greater than the change rate alarm value of the environment temperature signal, if so, controlling the alarm unit to give an alarm, and displaying that the change of the environment temperature is abnormal through the display unit; judging whether the environment humidity signal acquired by the environment information acquisition unit is greater than an environment humidity alarm value, if so, controlling the alarm unit to give an alarm, and displaying that the environment humidity is high through the display unit; calculating the change rate of the environment humidity signal, judging whether the change rate of the environment humidity signal is greater than the change rate alarm value of the environment humidity signal, if so, controlling the alarm unit to give an alarm, and displaying that the environment humidity changes abnormally through the display unit;
judging whether the temperature of the gun head is greater than a gun head temperature alarm value, if so, controlling the alarm unit to give an alarm, and displaying that the temperature of the gun head is high through the display unit; calculating the temperature change rate of the gun head, judging whether the temperature change rate of the gun head is greater than a temperature change rate alarm value of the gun head, if so, controlling the alarm unit to give an alarm, and displaying that the temperature change of the gun head is abnormal through the display unit;
calculating the difference value between the alternating voltage and the alternating rated voltage, judging whether the difference value between the alternating voltage and the alternating rated voltage is greater than the reference value of the difference value between the alternating voltage and the alternating rated voltage, if so, judging whether the difference value between the alternating voltage and the alternating rated voltage is greater than zero, if so, controlling the alarm unit to give an alarm, and displaying the alternating voltage overvoltage through the display unit; if the alternating voltage is not more than zero, the alarm unit is controlled to give an alarm, and the alternating voltage is displayed through the display unit; if the difference value is not greater than the reference value of the alternating voltage difference value, the alternating voltage is normal;
judging whether the alternating current is larger than an alternating current reference value or not, if so, controlling the alarm unit to give an alarm, and displaying the overcurrent of the alternating current through the display unit;
judging whether the output voltage is greater than an output voltage reference value, if so, controlling the alarm unit to give an alarm, and displaying the overvoltage of the output voltage through the display unit;
judging whether the output current is larger than an output current reference value or not, if so, controlling the alarm unit to give an alarm, and displaying the output current overcurrent through the display unit;
taking the smaller value of the insulation resistance between the anode and the ground wire and the insulation resistance between the cathode and the ground wire as an insulation resistance value, judging whether the insulation resistance value is greater than 500 omega/V, and if the insulation resistance value is greater than 500 omega/V, keeping the charging device in a normal state; if the insulation resistance value is not more than 500 omega/V, judging whether the insulation resistance value is less than 100 omega/V, if the insulation resistance value is less than 100 omega/V, the charging device is in a fault state, and charging is not allowed; if not less than 100 Ω/V, the charging device is in an abnormal state, but charging is still possible.
8. The monitoring system of claim 7, wherein the control processing unit further comprises a storage module and an external input/output interface, the storage module stores information of the monitoring system, the external input/output interface adopts a serial interface, and the serial interface is connected with an external device to complete parameter setting and information export of the monitoring system.
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| CN201911241440.5A CN110920453A (en) | 2019-12-06 | 2019-12-06 | Monitoring system for automobile charging device |
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Application publication date: 20200327 |