CN108482152B - Portable charger and controller thereof - Google Patents
Portable charger and controller thereof Download PDFInfo
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- CN108482152B CN108482152B CN201810254704.XA CN201810254704A CN108482152B CN 108482152 B CN108482152 B CN 108482152B CN 201810254704 A CN201810254704 A CN 201810254704A CN 108482152 B CN108482152 B CN 108482152B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H02J7/0077—
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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
- Y02T90/14—Plug-in electric vehicles
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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)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a portable charger and a controller thereof, wherein the portable charger is provided with the controller, the controller comprises a control chip, a temperature detection module, a power supply voltage detection module, a current detection module, a power supply phase sequence detection module, a pulse modulation circuit and a relay protection circuit, and the control chip is respectively and electrically connected with the temperature detection module, the power supply voltage detection module, the current detection module, the power supply phase sequence detection module, the pulse modulation circuit and the relay protection circuit. The portable charger can generate different PWM signals to establish connection with the electric automobile and communicate with the electric automobile to realize a basic charging function, can be compatible with charging protocols of the electric automobiles in different countries and regions, and simultaneously has the protection functions of over-temperature protection, over-current protection, leakage protection, phase sequence protection, power supply voltage protection, relay protection and the like.
Description
Technical Field
The invention relates to the field of electric automobile charging equipment, in particular to a portable charger for providing electric energy for an electric automobile and a controller thereof.
Background
Along with the increasing popularization of electric vehicles, electric vehicle charging modes are gradually concerned by more people, electric vehicle charging facilities mainly use charging piles at present, the charging piles can be fixed on the ground or on the wall, and the electric vehicle charging facilities are installed in public buildings (public buildings, markets, public parking lots and the like) and residential area parking lots or charging stations and can charge various types of electric vehicles according to different voltage levels.
The electric automobile charger is a charging equipment specially configured for electric automobile, and current electric automobile charger mostly joins in marriage on-vehicle label, and the producer all can be equipped with a section on-vehicle and be used for the electric automobile charger of charging connection when the electric automobile dispatches from the factory, but the charger that the producer joined in marriage mostly is special car special use, only matches the electric motor car of this brand and uses to the portable charger that most of matches on-vehicle only supports an electric power specification mode, difficult accomplishing comprehensive matching. As is known, different charging standards exist in the world of electric vehicles, and manufacturers need to independently match chargers aiming at different standards, and chargers sold in china cannot be used in europe, the united states and the like, and need to be matched aiming at different countries and regions. And because the functions of current and voltage detection and the like are lacked, the charging can not be completely matched with different manufacturers and electric automobiles with different models of the same standard.
Therefore, a charger capable of being matched with various different communication standards is provided, the charger is provided with a control chip, the control chip identifies information of a connected charging gun, for example, identifies whether the charging gun is a national standard charging gun or a American standard charging gun, and automatically matches with automobiles with the same interface at home and abroad, so that the charger is compatible with electric automobiles with European standard and American standard interfaces in software and hardware, and simultaneously supports different charging modes.
However, in order to improve the dynamic performance and energy utilization rate of the electric vehicle, the voltage of the power storage battery is higher and higher, the potential safety hazard of the electric vehicle in the charging process is higher and higher, most of the existing electric vehicle chargers have a charging protection function, namely, the chargers control the charger switches by detecting the voltage value of the electric vehicle storage battery, but the product quality of a plurality of charger manufacturers is uneven or the protection function of the chargers is not comprehensive enough, the condition that the electric vehicle storage battery is damaged or the chargers cannot be normally charged due to overlong charging time often occurs, meanwhile, because the protection function of the chargers is not comprehensive enough, certain potential safety hazard exists, accidents can be caused, the vehicle damage and the personal safety are caused, and great inconvenience is brought to users.
Disclosure of Invention
The invention mainly aims to provide a controller for a portable charger, which has compatibility and low potential safety hazard.
Another object of the present invention is to provide a portable charger with compatibility and low potential safety hazard.
In order to achieve the above-mentioned main object, the controller provided by the present invention comprises a control chip, a temperature detection module, a power voltage detection module, a current detection module, a power phase sequence detection module, a pulse modulation circuit and a relay protection circuit, wherein the control chip is respectively electrically connected to the temperature detection module, the power voltage detection module, the current detection module, the power phase sequence detection module, the pulse modulation circuit and the relay protection circuit, the control chip receives the charging gun type information connected to the controller, the temperature detection module sends a temperature control signal to the control chip, the control chip receives the power voltage value of the power voltage detection module, the control chip detects the current voltage value of the current detection module, the control chip receives the level value output by the power phase sequence detection module and outputs a matched PWM signal to the pulse modulation circuit according to the received power voltage value of the power voltage detection module and the charging gun type information, the control chip outputs a control on-off signal to the relay protection circuit.
According to the scheme, the controller comprises a control chip, a temperature detection module, a power supply voltage detection module, a current detection module, a power supply phase sequence detection module, a pulse modulation circuit and a relay protection module, the controller firstly carries out self-checking after receiving a power supply signal, and after the controller finishes self-checking and judges that the controller is qualified, the controller can communicate with the electric automobile and charge the electric automobile. In the charging process, the controller can also detect the ambient temperature, the power supply voltage, the leakage current and the working current in real time, once abnormity is found, the controller can send an interrupt signal to the relay protection module, so that the output is stopped, the safety of vehicles and personnel is protected, meanwhile, the relay protection device has the protection functions of over-temperature protection, over-current protection, leakage protection, power supply voltage protection, power supply phase sequence protection, relay protection and the like, and the safety of the personnel and the vehicles can be ensured.
The pulse modulation circuit comprises a double operational amplifier, a filter circuit and a voltage output circuit, wherein the filter circuit is electrically connected with the control chip, the first end of the double operational amplifier is electrically connected with the filter circuit, and the second end of the double operational amplifier is electrically connected with the voltage conversion circuit.
Therefore, the control chip is internally provided with the PWM signal generating circuit, the PWM signal can be output at the corresponding port, the pulse modulation circuit is used for receiving the PWM signal, and the filtering circuit carries out filtering or amplification processing and backflow prevention processing on the PWM signal, so that the capability of the control chip for dealing with abnormal signals is ensured.
The relay protection circuit comprises a triode and a relay, wherein the base electrode of the triode is electrically connected with the control chip, and the collector electrode of the triode is electrically connected with the relay.
Therefore, the relay serves as a load and is electrically connected with the collector of the triode, when the triode is saturated, the relay can have certain current to pass through, the relay is attracted at the moment, when the triode is cut off, no current passes through the relay, and the relay is released at the moment.
The temperature detection module comprises a temperature sensor and a first voltage-dividing resistor, the temperature sensor is electrically connected with the first voltage-dividing resistor, and the control chip detects a voltage value on the first voltage-dividing resistor.
Therefore, the temperature sensor and the first voltage dividing resistor form a voltage dividing circuit, and the change of the voltage can be measured through the change of the temperature sensor because the temperature sensor changes along with the change of the temperature, so that the upper limit and the lower limit of the voltage can be obtained, and the portable charger can be ensured to work in a normal temperature range.
The power supply voltage detection module comprises a voltage transformer, the voltage transformer is connected with the control chip and used for receiving a power supply voltage signal and converting the power supply voltage signal into a control voltage signal, and the voltage transformer sends the control voltage signal to the control chip.
Therefore, the voltage sensor outputs a voltage signal to the control chip, the control chip monitors the voltage output value in real time, and if the voltage output value exceeds a specified range, the control chip sends an interrupt signal to the relay, so that the output of the relay is stopped.
The current detection module comprises a leakage current detection circuit and a current detection circuit, wherein the leakage current detection circuit sends a leakage current detection signal to the control chip, and the current detection circuit sends a current detection signal to the control chip.
Preferably, the leakage current detection circuit includes a leakage current sensor, an output end of the leakage current sensor is connected to a first load resistor, and the first load resistor outputs a first voltage signal to the control chip.
It can be seen that if no leakage occurs, the control chip will not detect the output voltage of the first load resistor, once the leakage occurs, the control chip will detect the output voltage of the first load resistor, the control chip will detect whether the voltage value of the first load is within the set range in real time, and if the voltage value exceeds the set range, the control chip sends an interrupt signal to the relay, so that the output of the relay is terminated.
Preferably, the current detection circuit includes a current sensor, an output terminal of the current sensor is connected to a second load resistor, and the second load resistor outputs a second voltage signal to the control chip.
Therefore, the control chip detects whether the voltage value of the second load is within the set range in real time, and if the voltage value exceeds the set range, the control chip sends an interrupt signal to the relay to stop the output of the relay.
The controller further comprises a display module, the display module is electrically connected with the control chip, and the control chip sends a display signal to the display module.
Therefore, the display module is arranged, so that the fault information of the portable charger can be displayed in real time.
In order to achieve another object of the present invention, the present invention provides a portable charger including a charging gun, an interface socket, a cable, a power line, and a power plug, wherein the charging gun is detachably connected to the interface socket, the interface socket is fixedly connected to the cable, the power line is fixedly connected to the power plug, the charger further includes a controller, the controller is respectively fixedly connected to the cable and the power line, the controller includes a control chip, a temperature detection module, a power voltage detection module, a current detection module, a power phase sequence detection module, a pulse modulation circuit, and a relay protection circuit, the control chip is respectively electrically connected to the temperature detection module, the power voltage detection module, the current detection module, the power phase sequence detection module, the pulse modulation circuit, and the relay protection circuit, the control chip receives the type information of the charging gun connected to the controller, and the temperature detection module sends a temperature control signal to the control chip, the control chip receives a power supply voltage value of the power supply voltage detection module, detects a current voltage value on the current detection module, receives a level value output by the power supply phase sequence detection module, outputs a matched PWM signal to the pulse modulation circuit according to the received power supply voltage value of the power supply voltage detection module and the type information of the charging gun, and outputs a control on-off signal to the relay protection circuit.
According to the scheme, the portable charger further comprises a controller, the controller is respectively fixedly connected with the cable and the power line, the controller comprises a control chip, the temperature detection module, the power voltage detection module, the current detection module, the power phase sequence detection module, the pulse modulation circuit and the relay protection module, the portable charger firstly performs self-checking after receiving a power signal, after the self-checking is completed and the judgment is qualified, a user can connect the charging gun into a charging port of the electric automobile, and the communication and the charging of the charger and the electric automobile are realized through the charging gun. In the charging process, the charger can also detect the ambient temperature, the power supply voltage, the leakage current and the working current in real time, once abnormity is found, the controller can send an interrupt signal to the relay protection module, so that the output is stopped, the safety of vehicles and personnel is protected, and meanwhile, the charger has the protection functions of over-temperature protection, over-current protection, leakage protection, power supply voltage protection, power supply phase sequence protection, relay protection and the like, and the safety of the personnel and the vehicles can be ensured.
According to the scheme of the invention, the PWM generating circuit is arranged in the control chip and can output PWM signals to the pulse modulation circuit, the PWM signals are modulated by the pulse modulation circuit and then converted into modulated PWM signals, the modulated PWM signals are output to the charging gun through the voltage output circuit, a user can use the charging gun to access the charging port of the electric automobile, the modulated PWM signals are received by the vehicle-mounted charger of the electric automobile, and finally the charging mode to be carried out is obtained, so that the charger is connected with the electric automobile and communicates with the electric automobile to realize a basic charging function, the charger outputs different PWM signals through the controller, and the charger can be automatically matched with automobiles with the same interface at home and abroad so as to be compatible with charging protocols of electric automobiles in different countries and regions.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the portable charger of the present invention.
Fig. 2 is a functional block diagram of a controller in an embodiment of the portable charger of the present invention.
Fig. 3 is a schematic circuit diagram of a relay protection circuit of the controller in an embodiment of the portable charger of the present invention.
Fig. 4 is a schematic circuit diagram of a temperature detection module of the controller in an embodiment of the portable charger of the present invention.
Fig. 5 is a schematic circuit diagram of the power supply voltage detection module of the controller in an embodiment of the portable charger of the present invention.
Fig. 6 is a schematic circuit diagram of a leakage current detection circuit of the controller in an embodiment of the portable charger of the present invention.
Fig. 7 is a circuit schematic of the current sense circuit of the controller in an embodiment of the portable charger of the present invention.
Fig. 8 is a circuit schematic of the lightning protection circuit of the controller in an embodiment of the portable charger of the present invention.
Fig. 9 is a schematic circuit diagram of the power phase sequence detection module of the controller in an embodiment of the portable charger of the present invention.
Fig. 10 is a circuit schematic of the pulse modulation circuit of the controller in an embodiment of the portable charger of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
The portable charger is used for charging the electric automobile, and is used for realizing compatibility of different charging standards of the electric automobile and various protection functions in communication or charging processes with the electric automobile, and particularly has protection functions of over-temperature protection, overcurrent protection, leakage protection, phase sequence protection, power supply voltage protection, relay protection and the like. The portable charger comprises a controller, wherein the controller identifies charging modes of different standards by outputting different PWM signals and is provided with a plurality of protection modules, so that the compatibility of the electric automobile with different charging standards and a plurality of protection functions in the communication or charging process with the electric automobile are realized.
Referring to fig. 1, the portable charger of this embodiment includes charging gun 2, interface socket 6, cable 4, power cord 5, power plug 3 and controller 1, and charging gun 2 can be dismantled with interface socket 6 and be connected, and interface socket 6 and cable 4 fixed connection, power cord 5 and power plug 3 fixed connection, controller 1 respectively with cable 4 and power cord 5 fixed connection. Referring to fig. 2, the controller 1 includes a control chip 10, a temperature detection module 20, a power voltage detection module 30, a current detection module 40, a power phase sequence detection module 70, a pulse modulation circuit 80, and a relay protection circuit 60, where the control chip 10 is electrically connected to the temperature detection module 20, the power voltage detection module 30, the current detection module 40, the power phase sequence detection module 70, the pulse modulation circuit 80, and the relay protection circuit 60, respectively.
The temperature detection module 20 sends a temperature control signal to the control chip 10, the control chip 10 obtains a power supply voltage value of the power supply voltage detection module 30, the control chip 10 detects a current voltage value on the current detection module 40, the control chip 10 detects a level output signal on the power supply phase sequence detection module 70, and the control chip 10 outputs a control on-off signal to the relay protection circuit 60, so that the portable charger has protection functions such as over-temperature protection, over-current protection, leakage protection, power supply voltage protection, power supply phase sequence protection, relay protection and the like.
In this embodiment, when the user plugs the power plug 3 into the power source, that is, the portable charger accesses the power source, the portable charger performs self-checking on the environment where the portable charger is located, and at this time, the power source may be a 220V ac power source provided through a power socket. The self-checking content comprises an environment temperature detection mode, a power supply voltage detection mode, a power supply phase sequence detection mode, a current detection mode and a working mode, wherein the working mode is two charging modes of 220V 8A and 220V 16A. After the self-checking is finished and the judgment is qualified, the user can connect the charging gun 2 into the charging port of the electric automobile, and the communication and charging between the charger and the electric automobile are realized through the guiding circuit of the charging gun 2 and the corresponding signal line.
The charger can also detect the ambient temperature, the power supply voltage, the leakage current and the working current in real time in the charging process, and once any one of the above is detected to be abnormal, the controller 1 sends an interrupt signal to the relay protection module 60, so that the output is stopped, and the safety of vehicles and personnel is further protected.
Referring to fig. 3, the relay protection circuit 60 includes a transistor Q1 and a relay K1, a base of the transistor Q1 is electrically connected to the control chip 10, a collector of the transistor Q1 is electrically connected to the relay K1, a radiation electrode of the transistor Q1 is grounded, an input end of the relay K1 is electrically connected to the voltage input interface 7, an output end of the relay K1 is electrically connected to the voltage output interface 8, the relay K1 functions as a protection circuit, the relay K1 is turned on or off according to a voltage value output by the control chip 10, for example, when the voltage value output by the control chip 10 exceeds a set range, the control chip 10 sends an interrupt signal to the relay, the transistor Q1 is turned off, no current flows through the relay K1, and the relay K1 is in an off state. When the voltage value output by the control chip 10 is in a set range, the triode Q1 is saturated, current passes through the relay K1, and the relay K1 is closed to protect the safety of vehicles and personnel.
Referring to fig. 4, the temperature detecting module 20 includes a temperature sensor and a first voltage dividing resistor R2, the temperature sensor is electrically connected to the first voltage dividing resistor R2, the control chip 10 is configured to detect a voltage value of the first voltage dividing resistor R2, preferably, the temperature sensor is a thermistor RT1, it can be seen that the thermistor RT1 and the first voltage dividing resistor R2 form a voltage dividing circuit, since the thermistor RT1 changes with a change of temperature, the change of voltage can be detected by a change of the thermistor RT1, for example, when the temperature rises, the resistance of the thermistor RT1 decreases, and in contrast, the voltage in the voltage dividing circuit increases, when the temperature falls, the resistance of the thermistor RT1 increases, and in contrast, the voltage in the voltage dividing circuit decreases, the control chip 10 detects a change of voltage in the circuit, and thus, an upper and a lower limit of voltage under normal operation of the charger can be obtained, if the voltage variation exceeds the specified range, the control chip 10 will send an interrupt signal to the relay K1 to terminate the output of the relay K1, thereby ensuring that the portable charger operates in the normal temperature range.
Referring to fig. 5, the power supply voltage detection module 30 includes a voltage transformer 31, the voltage transformer 31 is electrically connected to the control chip 10 and the power supply phase sequence module 70, the power supply voltage detection module 30 increases a resistance value in a serial connection manner by providing a resistor R5, a resistor R6, and a resistor R7, so as to increase a withstand voltage value of the circuit, the voltage transformer 31 is configured to receive a power supply voltage signal, convert the power supply voltage signal into a voltage signal within an acceptable range of the control chip 10, and then send the voltage signal to the control chip 10, and as a result, the control chip 10 monitors the voltage output value of the power supply voltage detection module 30 in real time, and if the voltage output value exceeds the specified range, the control chip 10 sends an interrupt signal to the relay K1, so that the output of the relay K1 is terminated.
Referring to fig. 6 and 7, the current detection module 40 includes a leakage current detection circuit and a current detection circuit, the leakage current detection circuit sends a leakage current detection signal to the control chip 10, and the current detection circuit sends a current detection signal to the control chip 10. Preferably, the leakage current detection circuit includes a leakage current sensor 41, the output end of the leakage current sensor 41 is connected to a first load resistor R8, the first load resistor R8 outputs a first voltage signal to the control chip 10, the direction or phase of the current flowing through the zero line and the live line of the power supply is opposite, and the current flows through the leakage current sensor 41 to cancel each other out, so that if no leakage occurs, the control chip 10 cannot detect the output voltage of the first load resistor R8, once the leakage occurs, the control chip 10 detects the output voltage of the first load resistor R8, the control chip 10 detects whether the voltage value across the first load resistor R8 is within a set range in real time, and if the voltage value exceeds the set range, the control chip 10 sends an interrupt signal to the relay K1, thereby terminating the output of the relay K1. Preferably, the current detection circuit includes a current sensor 42, an output terminal of the current sensor 42 is connected to a second load resistor R9, and the second load resistor R9 outputs a second voltage signal to the control chip 10. It can be seen that the live wire of the power supply passes through the current sensor 42, the charging current is output according to a certain proportion by using the current sensor 42, a voltage signal is generated on the second load resistor R9, the control chip 10 detects whether the voltage value on the second load resistor R8 is within a set range in real time, and if the voltage value exceeds the set range, the control chip 10 sends an interrupt signal to the relay K1, so that the output of the relay K1 is terminated.
Referring to fig. 8, the controller further includes a lightning protection circuit, a first end of the lightning protection circuit 50 is electrically connected to the live wire, a second end of the lightning protection circuit 50 is connected to the zero line, and the lightning protection circuit 50 is provided to prevent the portable charger from being damaged and ensure personal safety and vehicle safety when the input power is abnormally impacted. The lightning protection circuit 50 comprises a piezoresistor RV1, a piezoresistor RV2, a thermistor RT2, an anti-detonator 53, a bidirectional filter 51, a fuse F1 and an AC/DC power supply module 52, wherein the first end of the thermistor RT2 is connected with a live wire, the second end of the thermistor RT2 is connected with the bidirectional filter 51, the piezoresistor RV1 and the piezoresistor RV2 are electrically connected with the anti-detonator 53 after being connected in series, the bidirectional filter 51 is electrically connected with the fuse F1, and the protection circuit consists of the piezoresistor, the thermistor, the anti-detonator 53, the bidirectional filter 51 and the fuse F1, the AC/DC power module 52 is protected when lightning surge occurs, and meanwhile, the AC/DC power module 52 has the functions of overcurrent protection and short-circuit protection, has strong self-recovery capability, when overvoltage occurs, the output can be automatically cut off, and after the overvoltage disappears for a certain time, the normal state can be automatically recovered.
Referring to fig. 9, the controller further includes a power phase sequence detection module 70, the power phase sequence detection module 70 is respectively connected to the power voltage detection module 30 and the control chip 10, the power phase sequence detection module 70 includes two bridge rectifier circuits, each bridge rectifier circuit includes a bridge diode group, a photocoupler 71, and a resistive load, the bridge rectifier circuit uses the single-phase conductivity of the bridge diode group to convert ac power into dc power, when the power is normally connected, the level of the output end of the rectifier circuit is a high voltage and a low level, when the power is in a wrong phase sequence or has a poor ground connection, the level output value of the output end of the rectifier circuit changes, and the control chip 10 detects whether the level output value of the output end of the rectifier circuit changes to determine whether the phase sequence and the ground connection of the power are good. In addition, the input and the output of the photoelectric coupler 71 are isolated from each other, and the electric signal transmission has the characteristics of unidirectionality and the like, so that the photoelectric coupler has good electric insulation capacity and interference resistance.
In this embodiment, the portable charger further includes a display module 90, the display module 90 is electrically connected to the control chip 10, the control chip 10 sends a display signal to the display module 90, the display module 90 includes an LED display lamp, and can display fault information of the portable charger in real time to remind a user of fault information of the current device, for example, the charger can detect power voltage, power phase sequence, self and ambient temperature, leakage current and working current in the self-test or charging process in real time, when an abnormality is found, the control chip 10 sends an interrupt signal to the relay protection module 60 to terminate the output of the relay K1, thereby protecting the safety of vehicles and personnel, meanwhile, the control chip 10 also sends a display signal to the display module 90, the display module 90 displays fault information of the portable charger in real time, so that the user can clearly understand the cause of the fault, and further troubleshoot the fault according to the cause of the fault.
In addition, referring to fig. 10, the pulse modulation circuit 80 is electrically connected to the control chip 10, the control chip 10 outputs the PWM signal to the pulse modulation circuit 80, the pulse modulation circuit 80 includes a dual operational amplifier 82, a filter circuit 100, a voltage output circuit 81, and a voltage comparator 83, the filter circuit 100 includes a diode D2, a diode D3, a diode D4, and a second voltage-dividing resistor R10, a first terminal of the dual operational amplifier 82 is electrically connected to an input terminal of the diode D3, a second terminal of the dual operational amplifier 82 is electrically connected to the second voltage-dividing resistor R10, and the voltage comparator 83 is electrically connected to the control chip 10.
The control chip 10 is internally provided with a PWM generating circuit, the PWM generating circuit can output PWM signals to a pulse modulation circuit 80, the PWM signals are modulated by the pulse modulation circuit 80 and then converted into modulated PWM signals, the output end of the pulse modulation circuit 80 is electrically connected with the input end of a voltage output circuit 81, the pulse modulation circuit 80 sends the modulated PWM signals to the voltage output circuit 81, the voltage output circuit 81 converts the modulated PWM signals into voltage output signals and outputs the voltage output signals to a charging gun 6, a user can access a charging port of an electric automobile by using the charging gun 2, and a vehicle-mounted charger of the electric automobile finally obtains a charging mode to be carried out after receiving the voltage output signals, so that the charger is connected with the electric automobile and communicates with the electric automobile to realize a basic charging function.
Meanwhile, the method for dealing with different standard protocols in different regions can match three charging guns with different standards for chargers to cater for electric vehicles with different standards in different countries, for example, a 0301 GB/T20234 national standard charging gun head, a 0302SAE J1772 American standard charging gun head and a 0303 IEC 62196 European standard charging gun head, wherein the three charging guns respectively correspond to three different charging standards of GB/T20234 national standard, SAE J1772 and IEC 62196, and can communicate and charge the electric vehicles meeting the standards.
Because the memory of the controller 1 stores communication data matched with charging protocols of electric vehicles in different countries and regions, and the controller 1 outputs a PWM signal matched with a charging gun to the pulse modulation circuit 80 according to the received power voltage value of the power voltage detection module 30 and the charging gun type information, the controller 1 can judge which charging mode the electric vehicle belongs to according to the charging gun type information, and generates a corresponding PWM signal according to a determined charging mode, the PWM signal is modulated by the pulse modulation circuit 80 and then is sent to the voltage output circuit 81, the voltage output circuit 81 converts the modulated PWM signal into a voltage output signal and outputs the voltage output signal to the charging gun 6, a user can access a charging port of the electric vehicle by using the charging gun 2, and a vehicle-mounted charger of the electric vehicle receives the voltage output signal and finally obtains the charging mode to be carried out, therefore, the electric automobile is communicated or charged, the charger is automatically matched with automobiles with the same interface at home and abroad, and the charging protocols of the electric automobiles in different countries and regions are compatible.
Similarly, the charger is matched with power plugs of different international standards, such as 0101 Chinese standard 220V plug, 0102 US standard 240V plug and 0103 European 3-pin plug, according to the use conditions of different countries and regions.
However, most of the input signals are filtered or amplified and anti-backflow processed by the filter circuit 100 before entering the control chip 10, and meanwhile, the filter circuit 100 is also provided with a large number of clamp circuits to ensure the capability of the control chip 10 to cope with abnormal signals, for example, referring to fig. 10, the diode D2 positions the voltage clamp of the AD pin of the control chip 10 below 3.3V, the diode D4 positions the voltage clamp of the AD pin of the control chip 10 above 0.7V, the diode D3 utilizes the anti-backflow processing designed by the unidirectional conductivity of the diode, R10 is a voltage dividing resistor, and C22 is a filter capacitor, which can filter high-frequency noise in the signals. When the AD pin of the control chip 10 is in signal abnormality, the filter circuit 100 can ensure that the signal strength input to the controller 1 is within the tolerable range of the controller 1.
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept also fall within the protection scope of the present invention.
Claims (10)
1. A controller for a portable charger, comprising:
the control chip is respectively electrically connected with the temperature detection module, the power supply voltage detection module, the current detection module, the pulse modulation circuit and the relay protection circuit;
the control chip receive with the type information of the rifle that charges that the controller is connected, just temperature detection module sends temperature control signal extremely control chip, control chip receives mains voltage value of mains voltage detection module, control chip detects the current voltage value in the current detection module, control chip receives the level value of power phase sequence detection module output to according to receiving mains voltage value of mains voltage detection module and the type information output matched PWM signal of the rifle extremely pulse modulation circuit, control chip output control break-make signal extremely relay protection circuit.
2. The controller according to claim 1, wherein:
the pulse modulation circuit comprises a double operational amplifier, a filter circuit and a voltage conversion circuit, wherein the filter circuit is electrically connected with the control chip, the first end of the double operational amplifier is electrically connected with the filter circuit, and the second end of the double operational amplifier is electrically connected with the voltage conversion circuit.
3. The controller according to claim 1 or 2, characterized in that:
the relay protection circuit comprises a triode and a relay, the base electrode of the triode is electrically connected with the control chip, and the collector electrode of the triode is electrically connected with the relay.
4. The controller according to claim 1 or 2, characterized in that:
the temperature detection module comprises a temperature sensor and a first voltage-dividing resistor, the temperature sensor is electrically connected with the first voltage-dividing resistor, and the control chip detects a voltage value on the first voltage-dividing resistor.
5. The controller according to claim 1 or 2, characterized in that:
the power supply voltage detection module comprises a voltage transformer, the voltage transformer is connected with the control chip, the voltage transformer is used for receiving a power supply voltage signal and converting the power supply voltage signal into a control voltage signal, and the voltage transformer sends the control voltage signal to the control chip.
6. The controller according to claim 1 or 2, characterized in that:
the current detection module comprises a leakage detection circuit and a current detection circuit, the leakage detection circuit sends a leakage detection signal to the control chip, and the current detection circuit sends a current detection signal to the control chip.
7. The controller of claim 6, wherein:
the electric leakage detection circuit comprises an electric leakage sensor, the output end of the electric leakage sensor is connected with a first load resistor, and the first load resistor outputs a first voltage signal to the control chip.
8. The controller of claim 6, wherein:
the current detection circuit comprises a current sensor, the output end of the current sensor is connected with a second load resistor, and the second load resistor outputs a second voltage signal to the control chip.
9. The controller according to claim 1 or 2, characterized in that:
the controller also comprises a display module, the display module is electrically connected with the control chip, and the control chip sends a display signal to the display module.
10. Portable charger, including rifle, interface socket, cable, power cord and power plug of charging, the rifle of charging with the connection can be dismantled to the interface socket, the interface socket with cable fixed connection, power cord and power plug fixed connection, its characterized in that:
the charger further comprises a controller, the controller is respectively and fixedly connected with the cable and the power line, the controller comprises a control chip, a temperature detection module, a power voltage detection module, a current detection module, a power phase sequence detection module, a pulse modulation circuit and a relay protection circuit, and the control chip is respectively and electrically connected with the temperature detection module, the power voltage detection module, the current detection module, the power phase sequence detection module, the pulse modulation circuit and the relay protection circuit;
the control chip receive with the type information of the rifle that charges that the controller is connected, just temperature detection module sends temperature control signal extremely control chip, control chip receives mains voltage value of mains voltage detection module, control chip detects the current voltage value in the current detection module, control chip receives the level value of power phase sequence detection module output to according to receiving mains voltage value of mains voltage detection module and the type information output matched PWM signal of the rifle extremely pulse modulation circuit, control chip output control break-make signal extremely relay protection circuit.
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| CN201810254704.XA CN108482152B (en) | 2018-03-26 | 2018-03-26 | Portable charger and controller thereof |
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| CN109193832A (en) * | 2018-09-12 | 2019-01-11 | 西安飞机工业（集团）有限责任公司 | A kind of method for security protection of charging system |
| WO2020056709A1 (en) * | 2018-09-21 | 2020-03-26 | 深圳市德品通电子有限公司 | Portable power supply device and power supply management method thereof |
| CN109738834B (en) * | 2019-01-31 | 2024-10-01 | 苏州经贸职业技术学院 | Detection device for server power supply |
| CN110040024A (en) * | 2019-05-10 | 2019-07-23 | 南通大地新能源汽车电控与连接技术研究院有限公司 | A kind of electric car charger |
| CN110723022A (en) * | 2019-10-22 | 2020-01-24 | 中国计量大学 | Portable alternating-current charging stake controller |
| CN111162582A (en) * | 2020-01-10 | 2020-05-15 | 张宏宾 | Portable 7KW alternating-current charging pile |
| CN112737336B (en) * | 2020-12-28 | 2022-11-22 | 格力博(江苏)股份有限公司 | Voltage transformation module, charger, charging system and voltage transformation control method |
| CN112810474A (en) * | 2021-02-10 | 2021-05-18 | 惠州市乐亿通科技有限公司 | Intelligent temperature control charging device and control method thereof |
| CN112937331B (en) * | 2021-05-11 | 2021-10-01 | 浙江富特科技股份有限公司 | Portable electric automobile charger |
| CN114572044A (en) * | 2022-03-09 | 2022-06-03 | 深圳市南霸科技有限公司 | Alternating current charging gun |
| GB2621670A (en) * | 2022-06-10 | 2024-02-21 | Ing H C F Porsche Ag | Method and control device for operating a charger for electrically driven vehicles and charger |
| CN115503532B (en) * | 2022-08-29 | 2024-04-12 | 赛力斯集团股份有限公司 | Charging control device and method applied to electric automobile |
| CN116231403B (en) * | 2023-03-14 | 2024-01-19 | 湘元宇控股有限公司 | USB data line with performance detection function |
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Application publication date: 20180904 Assignee: Hengqin Financial Investment International Finance Leasing Co.,Ltd. Assignor: ZHUHAI LCOLA TECHNOLOGY Co.,Ltd. Contract record no.: X2022980020356 Denomination of invention: Portable charger and its controller Granted publication date: 20200818 License type: Exclusive License Record date: 20221108 |
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