CN114216505A - Monitoring system and method for electric vehicle - Google Patents
Monitoring system and method for electric vehicle Download PDFInfo
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- CN114216505A CN114216505A CN202111521083.5A CN202111521083A CN114216505A CN 114216505 A CN114216505 A CN 114216505A CN 202111521083 A CN202111521083 A CN 202111521083A CN 114216505 A CN114216505 A CN 114216505A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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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
- 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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- Life Sciences & Earth Sciences (AREA)
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- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a monitoring system and a monitoring method of an electric vehicle, wherein the system comprises a monitoring module, a communication module, a display module and a control module, the monitoring module, the control module and the display module are in communication connection through the communication module, the monitoring module comprises a monitoring device and a microprocessor, and the monitoring device comprises an infrared temperature measurement detection module for measuring the temperature of an electric device of the electric vehicle, a current and voltage monitoring module for monitoring a power transmission line in the electric vehicle and a gas detection module for detecting the inside and the outside of the electric vehicle. The invention can timely find out the fault or potential safety hazard of the electric vehicle in the using process by carrying out real-time safety monitoring on the electric vehicle through the monitoring system, and can carry out corresponding preset operation through the control module when confirming the potential safety hazard, thereby reducing the vehicle fault and the injury of personnel.
Description
Technical Field
The present invention relates to safety monitoring of an electric vehicle, and more particularly, to a monitoring system and method for an electric vehicle.
Background
With the progress of scientific technology, the amount of electric vehicles used is rapidly increasing. In the use process of the current electric vehicle, for example, in the charging or running process, the conditions of spontaneous combustion, explosion and the like of the vehicle usually occur, and a great safety hazard exists.
In order to reduce potential safety hazards, a scheme of measuring the temperature of the battery pack is mainly adopted at present. The temperature of the battery component of most electric vehicles is distributed and installed by thermocouples or semiconductors and then is transmitted to a console after being integrated on the basis of a bus.
However, in practice, various potential safety hazards of the electric vehicle are not only the cause of the battery assembly, and a problem cannot be found very timely by simple temperature measurement, so that it is necessary to perform global monitoring of the operation of the power equipment and the charging and discharging process of the battery, and develop a more comprehensive monitoring scheme, such as monitoring of the potential hazards of the battery, the battery connector, the cable or the whole electric complete energy storage device.
Therefore, there is a need to improve the prior art, and especially in the charging and discharging or running process of the electric vehicle, the data should be comprehensively detected and analyzed, the state of the electric vehicle can be known in real time, the accident probability of the electric vehicle can be reduced, and the safety can be improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a monitoring system and a monitoring method of an electric vehicle.
In one aspect, the present invention provides a monitoring system for an electric vehicle, comprising: the monitoring module, the control module and the display module are in communication connection through the communication module, wherein: the monitoring module comprises a microprocessor and a monitoring device connected with the microprocessor, and the monitoring device comprises an infrared temperature measurement detection module for measuring the temperature of a power device of the electric vehicle, a current and voltage monitoring module for monitoring a power transmission line in the electric vehicle and a gas detection module for detecting the inside and the outside of the electric vehicle;
the microprocessor is used for analyzing and processing the data detected by the monitoring device and generating at least one piece of indication information according to the analysis and processing result, and the at least one piece of indication information is sent to the connected display module and/or the control module through the communication module;
the display module is used for outputting output information corresponding to the at least one piece of indication information, and the control module executes preset operation according to the at least one piece of indication information.
Further, the communication module is one or more of WIFI, Bluetooth, zigbee, LORA, GPRS, a 4G/5G/6G module, a 2.5G communication module, RS232 and RS 485.
Furthermore, the current and voltage monitoring module is connected with the microprocessor in a serial port connection mode.
Furthermore, the monitoring device also comprises one or more of an image video monitoring module, a temperature and humidity monitoring module, a three-dimensional attitude monitoring module and a positioning module which are connected with the microprocessor; the image video monitoring module and the temperature and humidity monitoring module are respectively arranged inside and/or outside the electric vehicle.
Further, the control module comprises a control switch, and the control switch is connected with one or more of a load circuit, a charging power supply circuit and an emergency alarm device in series.
Furthermore, the control switch is one or more of an LORA switch, a WIFI switch, a Bluetooth switch, a zigbee switch, a transparent serial port switch and an RS485 switch.
Furthermore, the infrared temperature measurement module is an infrared point temperature measurement sensor or an infrared thermal imaging sensor.
Further, the display module is provided with a local communication port and a wireless communication port.
In another aspect, the present invention provides a monitoring method for an electric vehicle, applied to the foregoing monitoring system, the method including:
detecting the electric vehicle through the monitoring device to obtain at least one monitoring data, wherein the monitoring data comprises infrared temperature measurement data corresponding to a power device in the electric vehicle, current and voltage data of a power transmission line in the electric vehicle and gas monitoring data in the electric vehicle;
judging whether various monitoring data are in corresponding safety range values;
and if the abnormal monitoring data which are not in the corresponding safety range exist, controlling the display module to output at least one prompt message corresponding to the abnormal monitoring data, and executing at least one preset operation by the control module.
Further, the control module controls the display module to output at least one prompt message corresponding to the abnormal monitoring data, and the control module executes at least one predetermined operation, including: controlling the display module to display the abnormal monitoring data or at least one piece of early warning information corresponding to the abnormal monitoring data according to a preset display mode; and controlling a power transmission line or a charging power supply loop of at least one piece of electric equipment connected with the control module in series to be in a power-off state, or sending an early warning instruction to a preset terminal, wherein the early warning instruction at least comprises position information of the electric vehicle.
Further, the method further comprises: determining the environmental state of the electric vehicle and the current vehicle state; and opening or closing the image video monitoring module or the temperature and humidity monitoring module according to the environment state and the vehicle state.
The invention has the beneficial effects that: the invention monitors various data of the temperature, the current and the voltage of the electric vehicle, the released gas and the like in real time, can find the abnormal condition of the electric vehicle in time through the interconnection and the summarization analysis of the data, and adopts corresponding control measures through the display module and the control module, such as displaying and outputting abnormal prompt information, controlling the power failure of related load circuits and the like, thereby reducing the vehicle fault risk and the injury of personnel and improving the safety of the electric vehicle.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a monitoring system according to the present invention;
FIG. 2 is a schematic structural diagram of a monitoring module according to the present invention;
FIG. 3 is a schematic flow chart of the monitoring method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides an electric vehicle monitoring system, which is used for comprehensively carrying out real-time safety monitoring on an electric vehicle and effectively reducing the risk of the electric vehicle breaking down. The system can be applied to electric vehicle equipment with a power device, such as private electric vehicles and private hybrid vehicles, and can also be used for indoor and outdoor charging facilities, passenger vehicles and public service vehicles, such as buses, electric trains, electric toy vehicles, electric airplanes, electric trailers/forklifts and the like.
As shown in fig. 1, the electric vehicle monitoring system includes a monitoring module, a communication module, a display module, and a control module, wherein the monitoring module, the display module, and the control module are connected via the communication module in a wired or wireless manner. The communication connection mode of the communication module can adopt wired and wireless modes, such as WIFI, Bluetooth, zigbee, LORA, GPRS, 4G/5G/6G module, 2.5G communication module, RS232 and RS485 and the like. The communication module comprises an internal communication module and an external communication module, wherein the internal communication module is used for communication connection among the monitoring module, the control module and the display module; the external communication module is mainly used for communication connection between the monitoring module and the user terminal.
Fig. 2 is a schematic structural diagram of a monitoring module according to an embodiment of the present invention. The monitoring module comprises a plurality of monitoring devices and a Microcontroller (MCU) connected with the monitoring devices, and the monitoring devices comprise an infrared temperature measurement detection module for measuring the temperature of an electric device of the electric vehicle, a voltage and current detection module for detecting a power transmission line in the electric device and a gas detection module for detecting the inside and the outside of the electric vehicle. Preferably, the monitoring module further comprises a temperature and humidity sensor, a video image sensor, a three-dimensional attitude sensor or a positioning module and the like, and the temperature and humidity sensor can be arranged inside the electric vehicle and outside the vehicle body; the video image sensor may include multiple cameras; the positioning module is a vehicle-mounted GPS positioning device or other positioning devices. In practical application, each monitoring device and the number thereof may be configured according to actual monitoring requirements, cost, field environment or management conditions, and other monitoring devices may be added for monitoring, which is not specifically limited in the embodiment of the present invention.
In the embodiment of the invention, the infrared temperature measurement detection module can be an infrared point temperature measurement or infrared thermal imaging sensor, and can be arranged inside and outside the electric vehicle according to the monitoring requirement. For example, an infrared temperature sensor disposed inside is used for temperature monitoring of the electric vehicle itself, and an infrared thermal imaging sensor disposed outside the vehicle can monitor whether human bodies, animals, and the like are present around the electric vehicle. The scheme of infrared monitoring is based on infrared ray is caught, especially infrared thermal imaging monitoring can realize the monitoring in big region, can discover by the object, need not contact by the object that is monitored. The battery pack in the electric vehicle has a plurality of branch batteries, connecting points between the battery units may have poor contact or generate high contact temperature, and the like, and the arrangement of a single sensor influences the reliability and the data communication is complex, so that the detection comprehensiveness and accuracy can be effectively improved by adopting an infrared point temperature measurement mode.
According to the invention, the infrared monitoring module can be used for monitoring the temperature of the battery pack or the whole power system during operation, and can also be used for maintenance and inspection, so that the hidden danger positions can be locked quickly, and the time for checking one by one is shortened. For example, if a battery pack of an electric vehicle includes thousands of battery cells, if the capacity of only 10 battery cells is reduced, the temperature of the battery pack may be high, or the temperature is severely low due to no operating current, and the location area where the fault point is located in the battery pack can be accurately located through infrared temperature measurement.
In one embodiment, it is considered that when a cable in an electric vehicle is in a short circuit or an intermittent short circuit, the temperature of the cable does not rise remarkably, but part of nodes can age rapidly due to accumulated discharge and the like, so that materials are gradually degraded under the action of current, and a release substance harmful to gas is generated; and after the vehicle has a fault or secondary faults occur due to the fault, for example, the control system fails to open the door, and oxygen in the vehicle is lack or harmful gas exceeds the standard due to high temperature. Therefore, the monitoring system can assist in gas monitoring of the electric vehicle by adopting the gas monitoring module while using the infrared temperature measurement monitoring module.
The gas monitoring module can be a gas sensor, the number of the gas sensors can be set as many as required, and the plurality of gas sensors can be connected with the microprocessor MCU in a wired or wireless mode, SO that combustible gas and harmful gas such as sulfur dioxide (SO) in the electric vehicle can be monitored2) Carbon dioxide (CO)2) Carbon monoxide (CO), formaldehyde (HCHO or CH)2O), and oxygen (O)2) And the contents are equal, and data of environmental safety and vehicle running safety are provided for field workers, drivers and passengers.
In another embodiment, consider the cable to have dielectric degradation such as heating due to long term high current charging, generation of voids, or generation of cracks due to wetting, crushing, etc., which, once suddenly gushed at some stage into a fouling corrosive or the like, would rapidly break down and induce combustion of the cable dielectric. Therefore, the monitoring system assists in monitoring leakage current of the power transmission line in the electric vehicle by adopting the current and voltage monitoring module. The current voltage monitoring module may be a voltage current sensor. Preferably, the voltage and current monitoring module is a digital independent module and is connected with the MCU through an RS485/232 communication interface, so that additional potential safety hazards are avoided, and the reliability and the safety of the monitoring system are improved.
Therefore, the monitoring module of the monitoring system has a multifunctional safety monitoring function, and the potential hazards of the battery, the battery connector, the cable or the whole electric complete energy storage device can be monitored according to the indexes of temperature, gas release and leakage current from the safety point of view. That is to say, the monitoring system in the invention not only considers the temperature of the battery assembly or the cable, but also considers the electric indexes of the leakage current of the cable and the battery, when the leakage occurs on the output cable or the interface of the battery, the subsequent hidden dangers such as high temperature, short circuit spark and the like are easily caused, and the monitoring module has the function of accessing the current and voltage monitoring module.
In addition, as shown in fig. 2, if the monitoring module is further configured with a temperature and humidity sensor or a video image sensor. In the monitoring process, the monitoring system can start the corresponding sensors under the authorization of a user, or can automatically trigger each sensor to acquire related data by combining the analysis results of other detection devices. For example, in the process of charging or driving a vehicle, besides basic infrared temperature measurement and gas and current and voltage monitoring, video image acquisition can be selectively carried out through user setting; however, when infrared thermal imaging detects that living bodies exist around the vehicle or detects that the temperature reaches a combustion point and special conditions such as combustion occur, the video image acquisition function of the monitoring module can be automatically triggered.
The microprocessor MCU is used for analyzing and processing the detection data transmitted by the monitoring device, controlling the display module to output corresponding indication information when the detection data are determined to be abnormal, and controlling the control module to execute preset operation. The microprocessor carries out interconnection summary analysis by processing detection data transmitted by the monitoring device, such as infrared temperature data, voltage and current data of a power transmission line, gas release data of the environment where the vehicle is located, three-dimensional attitude data, temperature and humidity data and the like, and judges whether the detection data are normal or not. For example, it is determined whether the temperature obtained by infrared temperature measurement is within a preset temperature range. The preset temperature range can be set to different temperature times according to different monitoring objects or different states of the same monitoring object. For example, for a battery pack, when it is in a charged state, the temperature of the battery pack is typically in the range of 0 ℃ to 52 ℃, and then [0 ℃, 52 ℃) can be set as the preset temperature range for the charged state; when the battery pack is in a discharge state, the temperature range is usually in the range of-20 ℃ to 66 ℃, and then [ -20 ℃, 66 ℃) can be set as the preset temperature range of the discharge state, so that whether the detected data are in a normal range can be judged, and if the detected data are not in the corresponding range, the monitored object corresponding to the detected data can be considered to have abnormality.
In the embodiment of the invention, if the relevant data monitored by the detection module is confirmed to be abnormal, the control module can control the relevant devices in the electric vehicle to execute the preset operation. The control module includes a controller and a control switch. Preferably, the control switch is a wireless switch, such as an LORA switch, a WIFI switch, a Bluetooth switch, a zigbee switch, a transparent serial port switch, an RS485 switch, and the like. The control switch can be connected in series with a charging power supply or a battery load and the like, wherein the battery load comprises electric equipment such as a vehicle-mounted refrigerator, an air conditioner, an electric appliance and auxiliary charging. The connection mode of the control module and the monitoring module is a wireless or wired mode, and the connection mode of the control module and the control switch is a wired or wireless mode.
When the monitoring module determines that the detection data is abnormal, the connected control module can be controlled to change the power utilization state of the corresponding equipment. For example, when the monitoring module determines that the temperature of the battery pack is abnormal, the relay switch can be controlled in a wireless or wired mode to disconnect the corresponding battery load loop or the corresponding charging power supply loop, and the MCU sends out a control signal again to close the charging power supply or the battery load loop until the maximum temperature value of the infrared temperature measurement is rapidly reduced to the ambient temperature or the set temperature. Under the condition of emergency, such as spontaneous combustion, flooding, casualties and the like of the vehicle, the monitoring module can also automatically send out an early warning instruction to the monitoring mechanism or the rescue mechanism through the control module, and the early warning instruction can comprise position information, license plate information, running track and the like of a fault vehicle, so that the monitoring mechanism can quickly position the vehicle and the fault condition of the vehicle, and corresponding rescue is carried out.
In the embodiment of the present invention, the display module may be a display terminal, such as a local display, disposed in the electric vehicle. Or, the display module may also be a mobile display terminal connected with the monitoring module in a wireless communication manner, such as a smart phone, a smart tablet, an intelligent terminal, an industrial personal computer, a PC, an integrated MCU, a display of a storage and communication module, and the like. Preferably, the display module may adopt a local display, which may be used for displaying simple data such as simple indication of temperature, leakage current, control state of gas or control switch, etc.
The communication module of the display terminal at least comprises a local communication port and a wireless communication port, wherein the wireless communication port is at least one of LORA, a transparent serial port, ZIGBEE, 4G/5G, WIFI and Bluetooth. During the monitoring process, the display module can share networked data through the wireless communication port, for example, the data is sent to a remote mobile device or a sharing platform; and in tasks such as detection, maintenance, verification and the like, data sharing with intelligent terminals of field maintenance and detection personnel through WIFI or transparent serial ports or LORA communication can be realized through local communication ports of the display modules.
Furthermore, the display terminal can be communicated and interconnected with the monitoring modules in a wired or wireless mode, so that observation and data communication in a large area are realized. Preferably, under the condition that the installation environment or the safety environment has high requirements, the monitoring module and the display terminal can be wirelessly connected, so that the mobility and the installation flexibility of the monitoring module and the display terminal are improved. The display module can display various types of monitoring data according to a preset mode, for example, the display module can display data of one or more monitoring modules, or the display module can realize regional visual monitoring data gathering display and display warning information according to the layout of a plurality of monitoring modules.
For example, when the monitoring data is normal, "the monitoring module 1, the maximum temperature of the vehicle battery is 50 ℃, and normal" is displayed in the display area in the display module; monitoring Module 2, oxygen (0)2) The content is 21 percent, and is excellent. Or, when the monitoring data is abnormal, the display module can display that the content of the toxic gas SO2 (sulfur dioxide) in the monitoring module 3 (or the monitoring in front of the vehicle) exceeds a set value; the monitoring module 4 (or the monitoring position at the rear right side of the vehicle) has a maximum temperature of over 100 ℃ and a high temperature area of over 80 ℃ of over 85% ", and the display module also outputs at least one prompt message, such as an alarm sound prompt, screen flashing or warning lamp lighting, for prompting a driver to pay attention or check parking.
It should be noted that, in the monitoring process, it is not necessary that each monitoring point satisfies the determination condition, but data of multiple monitoring points need to be interconnected, summarized and displayed, and the like. Once indexes similar to potential safety hazards exceed the limit, such as high temperature and the like, except that a driver can perform related measure defense (such as parking), in order to further improve the safety, partial power utilization devices, such as an on-vehicle refrigerator, an air conditioner, an electric appliance, auxiliary charging and the like, can be automatically cut off, and the power utilization of the devices can be cut off, so that the load current of a battery and a cable can be rapidly reduced, the temperature rising speed can be restrained, potential hazard sources can be reduced, and the accident spreading can be relieved.
As shown in fig. 3, an embodiment of the present invention further provides a monitoring method for an electric vehicle, which can be applied to the monitoring system. The method comprises the following steps:
s11: detecting the electric vehicle through the monitoring device to obtain at least one type of monitoring data, wherein the monitoring data comprises infrared temperature measurement data corresponding to a power device in the electric vehicle, current and voltage data of a power transmission line in the electric vehicle and gas monitoring data in the electric vehicle.
In this step, battery pack, battery and transmission line in the electric vehicle can be measured the temperature through infrared temperature measurement module, obtain temperature data, also can detect transmission line's current-voltage data through current-voltage sensor, can also detect in the electric vehicle through gas sensor simultaneously. Wherein, if infrared temperature measurement module still includes infrared thermal imaging sensor, then still can be through the inside and outside corresponding infrared picture data of infrared thermal imaging sensor monitoring electric vehicle to whether can monitor whether the inside condition of a fire takes place of vehicle and whether the vehicle outside has human, animal etc. that are close to. Of course, for the purpose of detection comprehensiveness, an environmental image of an environmental state where the electric vehicle is located may be monitored through the image video sensor, and temperature and humidity parameters of the electric vehicle may be monitored through the temperature and humidity sensor.
In order to improve the monitoring accuracy and reduce the monitoring cost, the monitoring system can also turn on or off part of monitoring devices, such as an image video sensor, a temperature and humidity sensor or other sensors, according to the current vehicle state and the environment state of the electric vehicle. For example, when the infrared temperature measurement sensor and the infrared thermal imaging sensor monitor that the vehicle burns, if the video image sensor is in a power-off closing state, the video image sensor can be automatically started to record videos; or, in the outdoor charging facility monitoring mode, the monitoring module is controlled to turn off the humidity measurement function or the local display function. Therefore, in practical applications, the monitoring system may select an existing monitoring module or add an additional monitoring device to monitor the relevant data according to actual requirements, which is not specifically limited in the embodiment of the present invention.
S12: and judging whether the various monitoring data are in the corresponding safety range values.
After the monitoring module in the monitoring system obtains the monitoring data of each sensor, the data are summarized and analyzed, and whether the highest value of each monitoring data is within the safety range value or not is judged. The normal state of the invention means that the value of each detection data is in the respective safe range value on one hand, and the overall condition presented by the interconnection and summarization of a plurality of detection data is normal on the other hand. The safety range value may be a numerical range or a limit threshold preset in the system in advance according to the electric vehicle safety standard, for example, a safe operating temperature range of the battery pack of the electric vehicle is set to [ -20 ℃, 60 ℃), a concentration limit threshold of the combustible gas is set to 25%, and the like. The safety range values corresponding to various types of monitoring data can be set respectively according to safety standards related to vehicle safety, and the invention is not particularly limited to this.
S13: and if the abnormal monitoring data which are not in the corresponding safety range exist, controlling the display module to output at least one prompt message corresponding to the abnormal monitoring data, and executing at least one preset operation by the control module.
In the embodiment of the invention, the monitoring system determines one or more data abnormalities in the electric vehicle according to the monitoring data, such as the detection of the sudden temperature rise of the power device and the harmful gas S02The concentration of (a) rises above a concentration limit threshold, etc., indicating that the battery pack and associated route of the electric vehicle may present a safety hazard. At this time, the monitoring system can control the wireless switch to perform a predetermined operation through the control module, such as the wireless switch, for example, to disconnect a power line of a partial load, or to send an early warning instruction to a relevant monitoring department or a rescue organization.
Meanwhile, the monitoring system can also control the display module, such as a local display or a mobile user terminal, to display the detection data according to a preset display mode, such as the summary display of the monitoring data; or, the display terminal can be controlled to output at least one early warning prompt message corresponding to the abnormal monitoring data, for example, the condition that the abnormality exists is prompted, and a driver is required to stop for checking, and the like. For the display and warning functions of the display module, please refer to the related contents in the foregoing system, which is not described herein again.
The monitoring system and method of the present invention are further described below in several exemplary application scenarios:
application scenario 1:
the monitoring device connected with the microprocessor in the monitoring system comprises an infrared temperature measuring sensor, a gas sensor and a current-voltage sensor, the microprocessor is connected with a local display and a controller through a communication module, and the current-voltage sensor is connected with the MCU through an RS485 port. The infrared temperature measurement sensor is configured to measure temperature in real time in the charging and using processes, the gas sensor can be used for real-time monitoring, periodic timing monitoring or trigger monitoring, and the trigger monitoring can be that a corresponding detection function is started by a trigger system such as the environment state, the vehicle state or abnormal monitoring data. For example, when the temperature in the air in the vehicle cabin is too high, the gas detection module is triggered to detect oxygen, carbon dioxide or other gases in the vehicle cabin.
In the charging or using process of the electric vehicle, the monitoring system adopts an infrared point temperature measuring sensor to monitor the temperature change of the electric vehicle, comprises a battery pack, a branch battery, a relevant line and the like, and simultaneously carries out corresponding detection on the electric vehicle through a gas sensor and a current-voltage sensor.
If the infrared temperature measuring point sensor monitors that the maximum temperature value of a certain area of the vehicle exceeds a safety limit value, the MCU can send a control signal in a wired or wireless mode to disconnect the charging power supply or the battery load, and when the maximum temperature value of infrared temperature measurement is rapidly reduced to the environment temperature or the set temperature, the MCU sends the control signal again to close the charging power supply or the battery load loop.
Or if the gas sensor monitors that the oxygen concentration in the electric vehicle is lower or the harmful gas exceeds the standard, the MCU controls the wireless switch to open the vehicle window and the vehicle door or start the fan to ventilate and the like, so that the injury to people in the vehicle is reduced.
Or, if the current-voltage sensor monitors that the leakage current of the transmission line is too large, the charging loop and the transmission line of the related electric equipment can be cut off, and continuous heating caused by large-current charging is avoided.
When the relevant measures are taken, corresponding early warning information such as characters, voice or indicator lights can be output in the display terminal to prompt the driver. When one or more indexes seriously exceed the warning value, an early warning instruction can be sent out through WIFI or 4G/5G and the like, and the rescue organization can perform related rescue, such as door opening, fire extinguishing or other rescue, according to the fault vehicle information in the early warning instruction, such as vehicle license plate information, vehicle fault type, vehicle position information and the like.
Obviously, the application scenario considers several indexes of temperature, gas release and leakage current from the safety perspective, and can consider hidden danger monitoring of a battery, a battery joint, a cable or the whole electric complete energy storage device.
Application scenario 2:
the infrared temperature measurement module in the monitoring system comprises an infrared thermal imaging sensor, if the infrared thermal imaging sensor is arranged on the right side of a front windshield or the right side of a rear windshield of a vehicle, a probe of the infrared thermal imaging sensor is aligned with an external area to detect. The monitoring system can judge whether living objects such as human bodies, animals and the like exist around the vehicle through the analysis of the infrared thermal imaging spectrum, so that the monitoring system can prompt the human bodies or the animals to approach at night or in the daytime and provide safety early warning when special conditions such as turning, crossing of a shady road, backing or intrusion of sudden personnel crossing the street in the running process are met. Or if the temperature of the high-temperature area or the high-temperature density of the infrared thermal imaging is over limit, the microprocessor triggers a control signal to disconnect the charging power supply and the load if the high-temperature area or the high-temperature density is considered to have high-temperature or explosion risks.
Of course, the display terminal can display the infrared thermal imaging map in real time, so that a vehicle driver can conveniently check the map, and the display terminal can also output corresponding voice prompts.
Application scenario 3:
the difference from the application scenarios 1 and 2 is that the monitoring device in the monitoring system further comprises a video image sensor, a three-dimensional attitude sensor, a temperature and humidity sensor, a GPS positioning sensor and the like.
When the three-dimensional attitude sensor monitors that the vehicle is turned over or the temperature and humidity sensor monitors that the vehicle wades in the vehicle and other emergency situations, the voice control or emergency button is started, and recording and automatic alarming of the internal environment and the external environment of the vehicle are achieved. The alarm can be used under the condition that the mobile phone cannot work or is lost, for example, the display terminal automatically starts a voice recording function or automatically dials a set rescue phone to send out an early warning and help seeking instruction or a recorded voice signal, the early warning and help seeking instruction comprises GPS positioning information, vehicle track information, vehicle license plate information and the like, and the rescue mechanism rapidly locks the position of the vehicle according to the GPS positioning information, the vehicle license plate and other information to perform related rescue.
In the application scene, the monitoring system also has the functions of attitude monitoring and GPS monitoring, so that the condition of the vehicle in the running process can be monitored more comprehensively, and particularly, the track monitoring of trains, motor cars, rental vehicles and trucks, whether a rollover accident occurs or not and the like can be completed.
While the foregoing description shows and describes a preferred embodiment of the invention, it is to be understood, as noted above, that the invention is not limited to the form disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and may be modified within the scope of the inventive concept described herein by the above teachings or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A monitoring system for an electric vehicle, the system comprising: monitoring module, communication module, display module and control module, monitoring module, control module with through communication module carries out communication connection between the display module, wherein: the monitoring module comprises a microprocessor and a monitoring device connected with the microprocessor, and the monitoring device comprises an infrared temperature measurement detection module for measuring the temperature of a power device of the electric vehicle, a current and voltage monitoring module for monitoring a power transmission line in the electric vehicle and a gas detection module for detecting the inside and the outside of the electric vehicle;
the microprocessor is used for analyzing and processing the data detected by the monitoring device and generating at least one piece of indication information according to the analysis and processing result, and the at least one piece of indication information is sent to the connected display module and/or the control module through the communication module;
the display module is used for outputting output information corresponding to the at least one piece of indication information, and the control module executes preset operation according to the at least one piece of indication information.
2. The protection system based on infrared monitoring and explosion-proof and flame-retardant of power equipment as claimed in claim 1, wherein: the communication module is one or more of WIFI, Bluetooth, zigbee, LORA, GPRS, a 4G/5G/6G module, a 2.5G communication module, RS232 and RS 485.
3. The electric vehicle monitoring system of claim 2, wherein the current voltage monitoring module is coupled to the microprocessor via a serial port connection.
4. The electric vehicle monitoring system of claim 3, wherein the monitoring device further comprises one or more of an image video monitoring module, a temperature and humidity monitoring module, a three-dimensional attitude monitoring module, and a positioning module connected to the microprocessor; the image video monitoring module and the temperature and humidity monitoring module are respectively arranged inside and/or outside the electric vehicle.
5. The electric vehicle monitoring system of claim 4, wherein the control module comprises a control switch, the control switch being one or more of a LORA switch, a WIFI switch, a Bluetooth switch, a zigbee switch, a transparent serial port switch, and an RS485 switch; the control switch is connected in series with one or more of a load circuit, a charging power supply circuit and an emergency alarm device.
6. The electric vehicle monitoring system of claim 1, wherein the infrared thermometry module is an infrared spot thermometry sensor or an infrared thermal imaging sensor.
7. The electric vehicle monitoring system of claim 1, wherein the display module is provided with a local communication port and a wireless communication port.
8. A monitoring method of an electric vehicle, applied to the monitoring system of any one of claims 1 to 8, characterized by comprising:
detecting the electric vehicle through the monitoring device to obtain at least one monitoring data, wherein the monitoring data comprises infrared temperature measurement data corresponding to a power device in the electric vehicle, current and voltage data of a power transmission line in the electric vehicle and gas monitoring data in the electric vehicle;
judging whether various monitoring data are in corresponding safety range values;
and if the abnormal monitoring data which are not in the corresponding safety range value exist, controlling the display module to output at least one prompt message corresponding to the abnormal monitoring data, and executing at least one preset operation by the control module.
9. The monitoring method of an electric vehicle according to claim 8, wherein the display module is controlled to output at least one prompt message corresponding to abnormality monitoring data, and the control module performs at least one predetermined operation including:
controlling the display module to display the abnormal monitoring data or at least one warning message corresponding to the abnormal monitoring data according to a preset display mode;
and controlling a power transmission line or a charging power supply loop of at least one piece of electric equipment connected with the control module in series to be in a power-off state, or sending an early warning instruction to a preset terminal, wherein the early warning instruction at least comprises position information of the electric vehicle.
10. The method of monitoring an electric vehicle of claim 9, further comprising:
determining the environmental state of the electric vehicle and the current vehicle state;
and opening or closing the image video monitoring module or the temperature and humidity monitoring module according to the environment state and the vehicle state.
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