CN107065972B - Direct current charger with charging gun temperature monitoring module - Google Patents
Direct current charger with charging gun temperature monitoring module Download PDFInfo
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- CN107065972B CN107065972B CN201710495755.7A CN201710495755A CN107065972B CN 107065972 B CN107065972 B CN 107065972B CN 201710495755 A CN201710495755 A CN 201710495755A CN 107065972 B CN107065972 B CN 107065972B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/66—Data transfer between charging stations and vehicles
- B60L53/665—Methods related to measuring, billing or payment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
A direct current charger with a charging gun temperature monitoring module comprises a main controller, a man-machine interaction display screen, a card swiping module, a power module, the charging gun temperature monitoring module, a power module, an insulation detection and discharge module and a direct current electric energy meter, wherein the man-machine interaction display screen, the card swiping module, the power module, the charging gun temperature monitoring module, the power module, the insulation detection and discharge module and the direct current electric energy meter are connected with the main controller, the charging gun temperature monitoring module comprises a single chip microcomputer, a debugging and downloading unit, an acquisition control unit, a power conversion unit, a CAN1 bus and a CAN2 bus, the debugging and downloading unit, the acquisition control unit, the power conversion unit, the CAN1 bus and the CAN2 bus are connected with the single chip microcomputer, the single chip microcomputer is connected with a charging gun through the CAN1 bus and is connected with the main controller through the CAN2 bus, the power conversion unit is connected with the power module, and the acquisition control unit is respectively connected with a K1 contactor, a K2 contactor and the charging gun. This rifle temperature monitoring module that charges can upgrade the transformation to the rifle that charges of present electric pile, and can realize a control by temperature change method through above-mentioned technical scheme, thereby can effectively monitor the rifle operating temperature that charges and ensure that the user has a safe intelligent service environment.
Description
Technical Field
The invention belongs to the field of charging gun temperature control of a charger, and particularly relates to a direct-current charger with a charging gun temperature monitoring module and a temperature control method.
Background
With the continuous improvement of the battery capacity and the production process of the electric vehicle, the advantages of low-carbon, environment-friendly and green travel of the electric vehicle are more and more obvious, the output of the electric vehicle is increased rapidly, and the requirement of a charger of the electric vehicle is increased more and more. However, the charging gun of the prior charger is not provided with a temperature detection device, if the charging gun is aged or the quality of the charging gun is damaged after long-time use, the gun body is overheated and melted, and even if the gun body is on fire, great potential safety hazards are brought to the personal property.
The standard of an off-board conductive charger for electric automobiles issued by 2016 puts requirements on temperature control, but specific temperature control parameters and control logic are not refined. In order to guarantee the safety of the charging time of the electric vehicle and meet the new national standard, a temperature control function needs to be added for upgrading and reconstruction. The service life of the electric vehicle charger produced in two days is far from the scrapping time, the cost of replacing the original main control system is high, the modification is complicated, and the realization is difficult.
Therefore, the charging cabinet that does not meet the new national standard obviously still has inconvenience and defects in function and safety of use, and needs to be further improved. In order to solve the above problems, related manufacturers have tried to solve the problems without worry, but it has not been found that suitable designs are developed and completed for a long time, and general products have no suitable structure to solve the above problems, which is obviously a problem to be solved by related manufacturers.
Disclosure of Invention
The invention aims to overcome the defects that a charging gun of the conventional direct current charger for the electric automobile has no temperature control function, is not intelligent, has low safety performance and does not meet the standard, provides the direct current charger with the charging gun temperature monitoring module, and provides a temperature control method thereof.
The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. The direct-current charger with the charging gun temperature monitoring module comprises a main controller, a human-computer interaction display screen, a card swiping module, a power module, the charging gun temperature monitoring module, a power module group, an insulation detection and discharge module, a direct-current electric energy meter and an alternating-current input end, wherein the human-computer interaction display screen, the card swiping module, the power module, the charging gun temperature monitoring module, the power module group, the insulation detection and discharge module and the direct-current electric energy meter are connected with the main controller, the alternating-current input end is connected with the power module, an auxiliary power supply and the power module group, and the auxiliary power supply is connected with a charging gun through a K2 contactor group; a temperature sensor is arranged in the charging gun and used for acquiring temperature signals of a direct current power supply positive electrode and a direct current power supply negative electrode in the charging gun; and the direct current output end of the power module group is connected with the charging gun sequentially through the insulation detection discharge module, the direct current electric energy meter and the K1 contactor group.
The rifle temperature monitoring module that charges includes the singlechip and the debugging that is connected with this singlechip download unit, acquisition control unit, power conversion unit, CAN1 bus and CAN2 bus, and wherein the singlechip passes through the CAN1 bus and is connected with main control unit, is connected with the rifle that charges through the CAN2 bus, power conversion unit is connected with power module, acquisition control unit is connected with K1 contactor group, K2 contactor group and the rifle that charges respectively.
The preferred, main control unit passes through UART1 bus and human-computer interaction display screen communication, and main control unit passes through UART2 bus and the module communication of punching the card, and main control unit passes through CAN3 bus and power module group communication, and main control unit passes through CAN4 bus and insulating detection bleeder module communication, and main control unit communicates through RS485 bus and direct current electric energy meter.
The invention also provides a method for controlling the temperature of the direct current charger with the charging gun temperature monitoring module, which comprises the following steps:
step 1: the charging gun temperature monitoring module converts a temperature signal acquired by a temperature sensor in the charging gun into a temperature value and reports the temperature value to the main controller of the charging machine.
Step 2: and the main controller compares the acquired temperature value with the temperature control parameters set by the main controller.
And step 3: and the main controller controls the charger to output current according to the compared result and the control logic set in the main controller.
And 4, step 4: and displaying the current working state information of a charging gun of the charger on a man-machine interaction display screen for a user to refer to.
Preferably, the setting of the temperature control parameters in step 2 includes: the "charger limited output power formula" is output power = (output current X64%) X output voltage; the over-temperature alarm temperature of the charging gun is 100 ℃; the charging gun over-temperature stopping charging temperature is 110 ℃; the lower limit of the temperature of the charging gun is displayed by a human-computer interaction display screen to be 60 ℃; the upper limit of the temperature of the charging gun is displayed by a human-computer interaction display screen to be 120 ℃; the over-temperature recovery temperature threshold of the charging gun is-10 ℃.
Preferably, the control logic in step 3 is: the charging gun temperature monitoring module monitors the positive working temperature and the negative working temperature of a direct-current power supply of a charging gun in real time, and when the positive temperature of the direct-current power supply is higher than the negative temperature of the direct-current power supply, the charger takes the positive temperature of the direct-current power supply as the current charging gun temperature; when the negative temperature of the direct-current power supply is higher than the positive temperature of the direct-current power supply, the charger takes the negative temperature of the direct-current power supply as the current temperature of the charging gun; when the positive temperature of the direct-current power supply is equal to the negative temperature of the direct-current power supply, the charger takes the positive temperature of the direct-current power supply as the current temperature of the charging gun.
The control logic further comprises: when the temperature of the charging gun is greater than or equal to the lower limit of the temperature of the charging gun displayed by the human-computer interaction display screen, the temperature of the charging gun currently used is displayed by the human-computer interaction display screen; when the temperature of the charging gun is greater than the upper limit of the temperature of the charging gun displayed by the human-computer interaction display screen, the temperature of the charging gun currently used is displayed by the human-computer interaction display screen to be the upper limit of the temperature of the charging gun displayed by the human-computer interaction display screen; and when the temperature of the charging gun is lower than the lower limit of the temperature of the charging gun displayed by the human-computer interaction display screen, the temperature of the charging gun currently used is not displayed by the human-computer interaction display screen.
The control logic further comprises: in the process of charging the electric automobile, when the temperature of a charging gun is greater than or equal to the over-temperature alarm temperature of the charging gun, the charger generates a charging gun temperature fault event record and lights a fault lamp, and simultaneously the charger limits the output power according to a charger output power limiting formula; after the temperature of the charging gun is reduced in a period of time and the accumulated temperature rise reaches the 'over-temperature recovery temperature threshold of the charging gun', the charger cancels power limitation, outputs according to the power requested by the battery management system of the electric automobile, and simultaneously turns off the fault lamp.
The control logic further comprises: in the process of charging the electric automobile, when the temperature of the charging gun is greater than or equal to the charging gun over-temperature charging stop temperature, the charger stops charging actively and generates a charging gun over-temperature protection charging record.
The control logic further comprises: when charging is started through the operation of the human-computer interaction display screen, if the temperature of the charging gun is displayed to be greater than or equal to the over-temperature alarm temperature of the charging gun on the charging gun selection interface, the user is prohibited from operating and selecting the charging gun through the human-computer interaction display screen, and meanwhile, the user is prompted by red characters on the human-computer interaction display screen to select the charging gun with normal temperature for charging; if the temperature of the charging gun is lower than minus 40 ℃, the charging gun is forbidden to be used for charging, the charger generates charging gun temperature fault event record and lights a fault lamp, and meanwhile, a user is prompted by red characters on the man-machine interaction display screen to select the charging gun with normal temperature for charging.
By means of the technical scheme, compared with the prior art, the invention has obvious advantages and beneficial effects. It has at least the following advantages:
1. the direct current charger with the charging gun temperature monitoring module can monitor the temperature of the charging gun head in real time and perform current-limiting cooling in time when an over-temperature condition occurs.
2. The charging gun temperature monitoring module in the direct current charger has the advantages of simple and reliable internal circuit, low cost of a micro control chip of the acquisition control circuit, adoption of a modular design, reconfigurability, expandability and the like.
3. The charging gun temperature monitoring module is communicated with an internal main control system in a CAN bus mode, is flexible and easy to expand, only needs to be additionally provided with one charging gun temperature monitoring module to be hung on a CAN bus which is communicated with a main controller, and CAN control the opening and closing of the charging gun in real time and collect the real-time temperature of the charging gun. Therefore, different temperature control strategies are started according to different temperature ranges of the charging gun in the operation process of the charger, and the safety of the charging process of the charger is guaranteed.
4. For the existing charger, if the charger is not provided with the charging gun temperature detection module, the charging gun temperature monitoring module provided by the invention can be directly installed and debugged on the existing charger, and the charger is very suitable for upgrading and reconstruction of the charger because the charger is low in cost, universal in interface and strong in expansibility and does not need to be replaced by a main control system of the existing charging pile.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are specifically described below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of the general architecture of the dc charger of the present invention.
Fig. 2 is a schematic diagram of a connection structure of the charging gun temperature monitoring module according to the present invention.
Fig. 3 is a schematic diagram of an external interface of the charging gun temperature monitoring module according to the present invention.
Fig. 4 is a communication interaction relationship diagram of the main controller of the direct current charger and the charging gun temperature monitoring module according to the invention.
Fig. 5 is a processing flow chart of the charging gun temperature monitoring module of the dc charger of the present invention.
Fig. 6 is a logic flow chart of the charging gun temperature monitoring module controlled by the main controller of the dc charger according to the present invention to perform temperature control.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given to specific embodiments, structures, features and effects of a dc charger with a charging gun temperature monitoring module and a temperature control method according to the present invention with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1 to 2, a dc charger with a charging gun temperature monitoring module includes a main controller, a man-machine interaction display screen, a card swiping module, a power module, a charging gun temperature monitoring module, a power module group, an insulation detection and discharge module, a dc electric energy meter, and an ac input terminal connected with the power module, an auxiliary power supply, and the power module and supplying power to the power module. The auxiliary power supply is connected with the charging gun through a K2 contactor group; the charging gun is a direct current charging gun, two paths of temperature sensors are arranged in the charging gun and are respectively used for acquiring temperature signals of a direct current power supply positive (DC +) and a direct current power supply negative (DC-) in the charging gun, and an electronic lock is further arranged in the charging gun, so that the charging gun can be prevented from falling off under the normal charging condition; and the direct current output end of the power module group is connected with the charging gun through the insulation detection discharge module, the direct current electric energy meter and the K1 contactor group in sequence, so that the charging gun can output direct current to the electric automobile. Specifically, the effect of K1 contactor group is that control direct current charger exports the direct current to electric automobile, and the effect of K2 contactor group is that control auxiliary power supply supplies power to electric automobile BMS to K1 contactor group, K2 contactor group all comprise two contactors, because direct current's transport includes direct current power supply just with direct current power supply burden two tunnel, therefore the positive break-make of a contactor control direct current power supply, another contactor control direct current power supply burden break-make. The direct current power supply is generally marked by DC + and is used for being connected with the positive electrode of a battery of the electric automobile; the DC power supply is generally identified by DC and is used for being connected with the negative electrode of the battery of the electric automobile.
This rifle temperature monitoring module that charges includes the singlechip and the debugging download unit that is connected with this singlechip, acquisition control unit, power conversion unit, CAN1 bus and CAN2 bus, and wherein the singlechip passes through the CAN1 bus to be connected with main control unit, is connected with the rifle that charges through the CAN2 bus, power conversion unit is connected with power module, acquisition control unit is connected with K1 contactor, K2 contactor and the rifle that charges respectively. The model of a singlechip used by the charging gun temperature monitoring module is an STM32F103C8T6 chip; the model of a chip used by the charger main controller is STM32F103ZET6; the model of the single chip microcomputer used by the debugging and downloading unit is STC89C54RD, and the unit can be connected to a serial port of a computer after being subjected to level conversion through an external RS-232 chip and is used for programming a program and online debugging and outputting; the acquisition control unit is composed of an ULN2003AD chip, the ULN2003AD chip is a high-voltage-withstanding large-current Darlington array and is composed of 7 silicon NPN Darlington chips, the current gain is high, the load carrying capacity is high, and the acquisition control unit is used for driving a contactor and electromagnets in a charging gun electronic lock so as to control opening and closing.
Furthermore, the alternating current input end supplies power to the power supply module, the auxiliary power supply and the power module group, and the power supply module converts alternating current voltage into 24V direct current to supply power to the main controller. The power module is also connected with a power conversion unit in the charging gun temperature monitoring module, the power conversion unit can further convert the input 24V direct current into 3.3V direct current voltage required by the normal work of a single chip microcomputer of the charging gun temperature monitoring module, concretely, the power conversion unit comprises a 7805 voltage adaptation chip which is mainly used for converting a system power supply, the 7805 voltage adaptation chip is connected to the single chip microcomputer of the charging gun temperature monitoring module, and the 24V direct current is converted into the 3.3V direct current voltage for use.
Furthermore, the main controller is connected with a human-computer interaction display screen through a URAT1 bus to carry out communication, and human-computer interaction and information display functions in the charging process are completed. The main controller is connected with the card swiping module through the URAT2 bus for communication, and the card swiping settlement function before charging and after charging are completed is completed.
Furthermore, the main controller is connected with the power module group through a CAN3 bus for communication, controls the opening and closing of the power module group, and controls the output current and voltage of each module in the charging process. The specific power module group is composed of a plurality of power modules, the power of each power module is 15KW, three-phase alternating current provided by an alternating current input end CAN be converted into direct current to be output by a charging gun, the main controller CAN control the starting number of the power modules according to actual requirements, if the charger outputs 60KW of power, the main controller sends information to the power module group through a CAN3 bus and starts the four power modules, and the purpose CAN be achieved.
Furthermore, the main controller is connected with an insulation detection and discharge module through a CAN4 bus for communication, the insulation detection and discharge module consists of an insulation detection module and a discharge module, wherein the insulation detection module CAN detect the insulation impedance of the positive electrode and the negative electrode of the direct current wire to the ground, so that the charging machine is protected in real time in a charging handshake stage; the discharge module is connected with the power module group, residual voltage of a direct current output circuit of the charger can be discharged after insulation detection and a charging process are finished, the specific measure is that the discharge resistor is connected to the output side of the power module to discharge, and the connection of the discharge resistor is disconnected after the discharge is finished.
Furthermore, the main controller is connected with the direct current electric energy meter through an RS485 bus to realize communication, and electric energy metering of direct current output of the charger is completed.
Further, the singlechip of the charging monitoring module is connected with the charging gun through the CAN2 bus, and when charging, the charging gun is connected with the charging socket of the electric automobile and then the singlechip is interacted with the BMS of the electric automobile, so that the CAN2 bus CAN realize the BMS communication between the charging gun temperature monitoring module and the electric automobile under the condition of automobile charging. The single chip microcomputer of the charging gun temperature monitoring module is connected with the main controller through the CAN1 bus for communication, in practical application, a plurality of charging guns CAN be arranged on the charger to realize the simultaneous output of electric energy of a plurality of charging guns, the charging gun temperature monitoring modules with corresponding quantity need to be arranged, the newly added charging gun temperature monitoring modules are hung on the CAN1 bus for communication with the main controller, and then the acquisition control unit, the CAN2 bus and the power supply conversion unit of the newly added charging gun temperature monitoring modules are connected into each module of the charger in the same mode to monitor the real-time temperature of each charging gun. The communication content of the charging gun temperature monitoring module comprises the steps of forwarding BMS messages of the electric vehicle, acquiring the state of a contactor, the temperature state of the charging gun and the like, and the charging gun temperature monitoring module can also receive and process commands such as controlling a direct current output contactor group K1 and controlling an electronic lock of the charging gun and the like sent by the main controller. Because the CAN bus CAN be articulated with a plurality of nodes, the communication and the control with the BMS of one electric automobile CAN be realized when a new charging gun temperature monitoring module is articulated, so that the one-to-many charging function of the charger is realized, and the service efficiency of the charger is greatly improved.
Furthermore, in the charging gun temperature monitoring module, an acquisition control unit is connected with a K1 contactor group to realize the control of the on-off of direct current; the acquisition control unit is also connected with the K2 contactor set and can control the connection and disconnection of an auxiliary power supply, the auxiliary power supply is a rectifier and can convert three-phase alternating current provided by an alternating current input end into direct current to be used by an electric vehicle BMS when a charger charges the electric vehicle; the acquisition control unit is also connected with the charging gun, can acquire the temperature measured by a temperature sensor in the charging gun and control the opening and closing of an electronic lock of the charging gun, and can also acquire state feedback signals of the electronic lock, state feedback signals of various contactors, in-place voltage signals of the charging gun and the like. As shown in fig. 1, the charging gun temperature monitoring module has two lines connected to the charging gun, wherein one line represents that the single chip of the charging gun temperature monitoring module is connected to the charging gun through the CAN2 bus, and the other line represents that the acquisition control unit is connected to the charging gun.
Based on the same inventive concept, the embodiment of the invention provides a method for controlling the temperature of the direct current charger with the charging gun temperature monitoring module, which comprises the following steps:
step 1: the charging gun temperature monitoring module converts a temperature signal acquired by a temperature sensor in the charging gun into a temperature value and reports the temperature value to the charger main controller.
Step 2: and the main controller compares the acquired temperature value with the temperature control parameters set by the main controller.
And step 3: and the main controller controls the output current of the charger according to the compared result and the control logic set in the main controller.
And 4, step 4: and displaying the current working state information of a charging gun of the charger on a man-machine interaction display screen for a user to refer to. The specific content of the step comprises displaying the temperature value in the step 1 on a man-machine interactive display screen; displaying the result after being compared with the set temperature control parameter in the step 2 on a man-machine interaction display screen; and (4) displaying the compared result in the step (3) on a man-machine interaction display screen according to the state information of the control logic output current.
Further, the temperature control parameters in step 2 are specifically set as: the "charger limited output power formula" is output power = (output current X64%) X output voltage; the over-temperature alarm temperature of the charging gun is 100 ℃; the charging gun over-temperature stopping charging temperature is 110 ℃; the lower limit of the temperature of the charging gun is displayed by a human-computer interaction display screen to be 60 ℃; the upper limit of the temperature of the charging gun is displayed by a human-computer interaction display screen to be 120 ℃; the over-temperature recovery temperature threshold of the charging gun is-10 ℃. Specifically, the specific meaning of the "the lower limit of the temperature of the charging gun displayed by the man-machine interaction display screen is 60 ℃" is that: only when the temperature of the charging gun reaches above 60 ℃, the temperature value of the charging gun can be displayed on the man-machine interaction display screen to remind an operator of beginning to be alert about the temperature of the charging gun, so that the gun is prevented from being too high in temperature and causing adverse consequences; if the gun temperature is lower than 60 ℃, the human-computer interaction display screen does not display the temperature of the charging gun, and the temperature of the charging gun does not reach the degree of vigilance as the temperature is lower than 60 ℃, namely the charging gun is in a safe use environment. The charging gun over-temperature recovery temperature threshold is-10 ℃, wherein the temperature is "-10 ℃, the temperature does not refer to 10 ℃ below zero, and the parameter setting specific meaning is as follows: when the over-temperature of the charging gun reaches 100 ℃, the charging gun limits the power output of the charging gun according to a charger output power limiting formula, and when the accumulated temperature is reduced by 10 ℃, namely, the accumulated temperature is reduced to 90 ℃, the charger can output current normally according to the request of the BMS under the normal condition.
Further, the control logic in step 3 is: the charging gun temperature monitoring module monitors the current working temperatures of a direct current power supply positive (namely DC +) and a direct current power supply negative (namely DC-) of a charging gun in real time, and when the direct current power supply positive temperature of the charging gun is higher than the direct current power supply negative temperature, the charger takes the direct current power supply positive temperature as the current charging gun temperature; when the negative temperature of the direct-current power supply is higher than the positive temperature of the direct-current power supply, the charger takes the negative temperature of the direct-current power supply as the current temperature of the charging gun; when the positive temperature of the direct-current power supply is equal to the negative temperature of the direct-current power supply, the charger takes the positive temperature of the direct-current power supply as the temperature of the current charging gun.
Further, the control logic further comprises: when the temperature of the charging gun is greater than or equal to the lower limit of the temperature of the charging gun displayed by the human-computer interaction display screen, the temperature of the charging gun currently used is displayed by the human-computer interaction display screen; when the temperature of the charging gun is greater than the upper limit of the temperature of the charging gun displayed by the human-computer interaction display screen, the temperature of the charging gun currently used is displayed by the human-computer interaction display screen to be the upper limit of the temperature of the charging gun displayed by the human-computer interaction display screen; and when the temperature of the charging gun is lower than the lower limit of the temperature of the charging gun displayed by the man-machine interaction display screen, the temperature of the charging gun currently used is not displayed by the man-machine interaction display screen.
Further, the control logic further comprises: in the process of charging the electric automobile, when the temperature of a charging gun is greater than or equal to the over-temperature alarm temperature of the charging gun, the charger generates a charging gun temperature fault event record and lights a fault lamp, and simultaneously limits the output power according to a charger output power limiting formula; after the temperature of the charging gun is reduced in a period of time and the accumulated temperature rise reaches the 'over-temperature recovery temperature threshold of the charging gun', the charger cancels power limitation, outputs according to the power requested by the battery management system of the electric automobile, and simultaneously turns off the fault lamp.
Further, the control logic further comprises: in the process of charging the electric automobile, when the temperature of the charging gun is greater than or equal to the charging gun over-temperature charging stop temperature, the charger stops charging actively and generates a charging gun over-temperature protection charging record.
Further, the control logic further comprises: when charging is started through the operation of the human-computer interaction display screen, on a charging gun selection interface, if the temperature of the charging gun is displayed to be greater than or equal to the charging gun over-temperature alarm temperature, a user is prohibited from operating and selecting the charging gun through the human-computer interaction display screen, and the user is prompted by red characters on the human-computer interaction display screen to select the charging gun with normal temperature for charging; if the temperature of the charging gun is lower than minus 40 ℃, the charging gun is forbidden to be used for charging, the charger generates charging gun temperature fault event record and lights a fault lamp, and meanwhile, a user is prompted by red characters on the man-machine interaction display screen to select the charging gun with normal temperature for charging.
As shown in fig. 3, it is an external interface diagram of the charging gun temperature monitoring module. Wherein XS5 is a power supply interface, VIN is a +24V power supply input, and IGND is an input ground. XS6 is a charging gun electronic LOCK interface, DJ + and DJ-control the opening, closing and output signals of an electronic LOCK, and LOCK is an input signal for detecting the state of the electronic LOCK. AD0 of XS2 is a charging gun on-position voltage value input signal, ADT1 and ADT2 are charging gun temperature detection input signals, and the two paths of temperature sensors are respectively connected with ADT1 and ADT2; the charging gun temperature monitoring module obtains a charging gun voltage value and a charging gun temperature value through AD conversion calculation; CAN2H and CAN2L are CAN interfaces that communicate with the electric vehicle BMS. XS7 is a control output interface of the auxiliary power supply and is used for controlling the K2 contact group. IN1 and IN2 of XS1 are feedback signal input pins of DC +/DC-, and CAN1H and CAN2L are communication interfaces between a charging gun temperature monitoring module and a master control system CAN. And a DC + pin of the XS4 is an output control interface of the K1 contact group for controlling the on-off of the direct current circuit.
As shown in fig. 4, it is an interactive relationship diagram of the main controller of the dc charger and the charging gun temperature monitoring module. And initializing and opening the charging gun temperature monitoring module after the direct current charger main controller is electrified, and initializing the charging gun temperature monitoring module to respond to a command of the main controller. And the main controller is communicated with the charging gun temperature monitoring module in real time through CAN in the operation process. And the charging gun temperature monitoring module executes response action according to a command sent by the main controller. And when the main controller finishes running, sending a module closing command to terminate the running of the charging gun temperature monitoring module.
Fig. 5 is a flow chart of the processing of the charging gun temperature monitoring module of the dc charger according to the present invention. The charging gun temperature monitoring module is initialized after being electrified, then the temperature of the charging gun is detected in real time, and the gun position voltage value of the charging gun is detected in real time. And the charging gun temperature monitoring module acquires that the normal gun position voltage of the charging gun is 4V,6V and 12V. And the charging gun temperature monitoring module responds to the command of the main controller for acquiring the charging gun temperature and the gun position voltage in real time. And the charging gun temperature monitoring module controls the electronic lock of the charging gun to be opened or closed according to a control signal sent by the charger main controller, and detects a feedback signal of the electronic lock in real time. The charging gun temperature monitoring module controls the on-off of direct current DC +/DC-in a mode of closing or opening the K1 contact group according to a signal sent by the charger main controller, and detects a feedback signal of the K1 contact group in real time.
As shown in fig. 6, it is a flow chart of the process of controlling the temperature of the charging gun by the main controller of the dc charger, which directly describes the temperature control logic of the dc charger. After the direct current charger is powered on, the main controller initializes each module, including initializing an insulation detection and discharge module, a direct current electric energy meter, a power module group and the like, so that the charger is in a working state and responds to a charging demand in real time. As shown in the right flow chart in fig. 6, a timing task of 10ms is run in the main controller, which obtains the temperature of the charging gun from the charging gun temperature monitoring module of the dc charger in real time, and if the temperature of the charging gun is within the effective range, the temperature of the charging gun is immediately updated and stored. As shown in the main flow chart on the left side of fig. 6, the main controller judges whether the temperature of the charging gun reaches the lower limit of the temperature of the charging gun displayed on the man-machine interaction display screen, namely 60 ℃, according to the temperature value updated and stored in the effective range, if the temperature reaches the lower limit, the current value is displayed on the man-machine interaction display screen, so that the temperature of the charging gun of the charging personnel is monitored and prompted in real time, and if the temperature does not reach the lower limit, the charging gun jumps directly to an operation interface of the man-machine interaction display screen to start charging. When a charging person clicks a charging button on a human-computer interaction interface, the system can judge whether the temperature of a charging gun currently inserted into the electric automobile is within a usable range, if the charging gun is over-temperature, the over-temperature is 100 ℃ higher than the over-temperature alarm temperature of the charging gun, the charging gun is prompted to be over-high in temperature and cannot be charged, and other charging guns with normal temperatures are manually selected to be replaced for charging. If the gun temperature is normal, the gun begins charging. In the charging process, whether the charging gun temperature that main control unit is charging is too warm is judged in real time, if the temperature is normal, just charge according to the voltage electric current that electric automobile BMS requested. Otherwise, if the charging gun temperature reaches the alarm threshold (namely the charging gun over-temperature alarm temperature) but does not reach the control threshold (namely the charging gun over-temperature stop charging temperature), the charger carries out power-limited charging on the electric vehicle according to a charger output power limiting formula. Under the condition of limiting power output, the temperature can be slowly reduced after a period of time, once the temperature of the charging gun is recovered to the normal temperature, namely the over-temperature recovery temperature threshold of the charging gun reaches-10 ℃, the charger normally charges the electric automobile according to the current requested by the BMS of the electric automobile. If the charging gun temperature reaches the control threshold (i.e., "charging gun over-temperature stop charging temperature"), the charging is immediately suspended.
The above description is only a preferred embodiment of the present invention, and any simple modification, equivalent change and modification made by those skilled in the art according to the technical essence of the present invention are within the technical scope of the present invention.
Claims (2)
1. The utility model provides a direct current charger of rifle temperature monitoring module charges in area which characterized in that: comprises a main controller, a man-machine interaction display screen, a card swiping module, a power supply module, a charging gun temperature monitoring module, a power module group, an insulation detection and discharge module, a direct current electric energy meter and an alternating current input end, wherein the man-machine interaction display screen, the card swiping module, the power supply module, the charging gun temperature monitoring module, the power module group, the insulation detection and discharge module and the direct current electric energy meter are connected with the main controller, the alternating current input end is connected with the power supply module, an auxiliary power supply and the power module group,
the auxiliary power supply is connected with the charging gun through a K2 contactor group;
a temperature sensor is arranged in the charging gun and used for acquiring temperature signals of a direct current power supply positive electrode and a direct current power supply negative electrode in the charging gun;
the output end of the power module group is connected with the charging gun through the insulation detection discharge module, the direct current electric energy meter and the K1 contactor group in sequence;
the charging gun temperature monitoring module comprises a single chip microcomputer, a debugging and downloading unit, an acquisition control unit, a power supply conversion unit, a CAN1 bus and a CAN2 bus, wherein the debugging and downloading unit, the acquisition control unit, the power supply conversion unit, the CAN1 bus and the CAN2 bus are connected with the single chip microcomputer;
the temperature control method of the direct current charger with the charging gun temperature monitoring module comprises the following steps:
step 1: the charging gun temperature monitoring module converts a temperature signal acquired by a temperature sensor in a charging gun into a temperature value and reports the temperature value to a main controller of a charger in real time;
and 2, step: the main controller compares the acquired temperature value with the temperature control parameters set by the main controller;
and step 3: the main controller controls the magnitude of the output current of the charger according to the compared result and control logic set in the main controller;
and 4, step 4: displaying the current working state information of a charging gun of the charger on a man-machine interaction display screen for a user to refer to;
wherein, the setting of the temperature control parameters in the step 2 comprises:
the "charger limited output power formula" is output power = (output current X64%) X output voltage;
the over-temperature alarm temperature of the charging gun is 100 ℃;
the charging gun over-temperature stopping charging temperature is 110 ℃;
the lower limit of the temperature of the charging gun is displayed by a human-computer interaction display screen to be 60 ℃;
the upper limit of the temperature of the charging gun is displayed by a human-computer interaction display screen to be 120 ℃;
the over-temperature recovery temperature threshold of the charging gun is-10 ℃;
the control logic in step 3 is: the charging gun temperature monitoring module monitors the positive working temperature and the negative working temperature of a direct-current power supply of a charging gun in real time, and when the positive temperature of the direct-current power supply is higher than the negative temperature of the direct-current power supply, the charger takes the positive temperature of the direct-current power supply as the current charging gun temperature; when the negative temperature of the direct-current power supply is higher than the positive temperature of the direct-current power supply, the charger takes the negative temperature of the direct-current power supply as the current temperature of the charging gun; when the positive temperature of the direct-current power supply is equal to the negative temperature of the direct-current power supply, the charger takes the positive temperature of the direct-current power supply as the current temperature of the charging gun; the control logic further comprises: when the temperature of the charging gun is greater than or equal to the lower limit of the temperature of the charging gun displayed by the human-computer interaction display screen, the temperature of the charging gun currently used is displayed by the human-computer interaction display screen; when the temperature of the charging gun is greater than the upper limit of the temperature of the charging gun displayed by the human-computer interaction display screen, the temperature of the charging gun currently used is displayed by the human-computer interaction display screen to be the upper limit of the temperature of the charging gun displayed by the human-computer interaction display screen; when the temperature of the charging gun is lower than the lower limit of the temperature of the charging gun displayed by the human-computer interaction display screen, the temperature of the charging gun currently used is not displayed by the human-computer interaction display screen; in the process of charging the electric automobile, when the temperature of the charging gun is greater than or equal to the charging gun over-temperature charging stop temperature, the charger actively stops charging and generates a charging gun over-temperature protection charging record; when charging is started through the operation of the human-computer interaction display screen, if the temperature of the charging gun is displayed to be greater than or equal to the over-temperature alarm temperature of the charging gun on the charging gun selection interface, the user is prohibited from operating and selecting the charging gun through the human-computer interaction display screen, and meanwhile, the user is prompted by red characters on the human-computer interaction display screen to select the charging gun with normal temperature for charging; if the temperature of the charging gun is lower than minus 40 ℃, the charging gun is forbidden to be used for charging, the charger generates charging gun temperature fault event record and lights a fault lamp, and meanwhile, a user is prompted by red characters on the man-machine interaction display screen to select the charging gun with normal temperature for charging.
2. The direct-current charger with the charging gun temperature monitoring module according to claim 1, wherein the main controller communicates with the human-computer interaction display screen through a UART1 bus, communicates with the card swiping module through a UART2 bus, communicates with the power module group through a CAN3 bus, communicates with the insulation detection and discharge module through a CAN4 bus, and communicates with the direct-current electric energy meter through an RS485 bus.
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| CN109460087A (en) * | 2017-09-06 | 2019-03-12 | 比亚迪股份有限公司 | A kind of AC/DC integrated temperature control charging unit |
| CN107825969B (en) * | 2017-09-22 | 2020-02-14 | 许继电源有限公司 | Electronic lock control method and device for charging gun head of electric vehicle and electronic lock device |
| CN107546824A (en) * | 2017-10-18 | 2018-01-05 | 北京科佳同创新能源科技有限公司 | A kind of highly integrated charger controller and charger |
| CN108162783A (en) * | 2017-12-29 | 2018-06-15 | 上海鼎充新能源技术有限公司 | A kind of three-level structure control system of DC charging motor |
| CN110103752A (en) * | 2018-01-04 | 2019-08-09 | 厦门新页科技有限公司 | A kind of wire and wireless integrated pile and its charge control method |
| CN108365656A (en) * | 2018-03-20 | 2018-08-03 | 孟增丽 | A kind of automobile charging pile security protection system |
| CN109159689A (en) * | 2018-09-28 | 2019-01-08 | 广州万城万充新能源科技有限公司 | A kind of DC charging terminal of new intelligent |
| CN109606196B (en) * | 2019-01-18 | 2023-11-17 | 四川瑞可达连接系统有限公司 | Electric automobile rifle that charges of area control by temperature change function |
| CN109733243B (en) * | 2019-02-15 | 2022-04-26 | 上海蔚来汽车有限公司 | Charge control between powered vehicle and charging apparatus |
| CN109795363A (en) * | 2019-02-19 | 2019-05-24 | 上海韧思能源科技有限公司 | A kind of electric car charge monitoring device |
| CN109885111B (en) * | 2019-04-24 | 2021-03-19 | 宁波三星智能电气有限公司 | Heat dissipation control method and device and charging pile |
| CN110239378B (en) * | 2019-07-04 | 2022-03-25 | 广州顺充新能源有限公司 | Control method for self-adaptive current output of alternating current charging pile |
| CN113479083A (en) * | 2021-08-18 | 2021-10-08 | 绿能慧充数字技术有限公司 | Protection device and method for safe use of direct current charging gun |
| CN113815467B (en) * | 2021-11-24 | 2022-02-08 | 深圳市永联科技股份有限公司 | Charging pile current control method and related device |
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| CN103427458B (en) * | 2013-07-26 | 2015-08-19 | 国家电网公司 | A kind of charging pile with multi output function |
| CN105182854B (en) * | 2015-09-21 | 2018-05-29 | 许继电源有限公司 | A kind of charging pile distributed director |
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| CN105553028A (en) * | 2016-02-01 | 2016-05-04 | 凯迈(洛阳)电子有限公司 | DC charging pile capable of simultaneous output from multiple pistols |
| CN206171215U (en) * | 2016-09-30 | 2017-05-17 | 深圳市沃特玛电池有限公司 | Charging system and electric automobile and socket that charges thereof |
| CN207488848U (en) * | 2017-06-26 | 2018-06-12 | 凯迈(洛阳)电子有限公司 | A kind of DC charging motor with charging gun temperature monitoring module |
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