CN112895959A - Direct current charging control system and control method for electric vehicle - Google Patents

Direct current charging control system and control method for electric vehicle Download PDF

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Publication number
CN112895959A
CN112895959A CN201911228801.2A CN201911228801A CN112895959A CN 112895959 A CN112895959 A CN 112895959A CN 201911228801 A CN201911228801 A CN 201911228801A CN 112895959 A CN112895959 A CN 112895959A
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cooling
charging
control system
direct current
temperature
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刘方勇
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Qoros Automotive Co Ltd
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Qoros Automotive Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/302—Cooling of charging equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

Abstract

According to the direct current charging control system and the control method for an electric vehicle of the embodiment of the present invention, the direct current charging control system includes: a cooling assembly, a battery management system, a temperature sensor, and a controller; the cooling assembly is suitable for cooling a charging socket of the electric vehicle, and the cooling strength of the cooling assembly can be adjusted; the battery management system interacts with the charging pile to acquire current information of the charging pile; the temperature sensor is arranged in the charging socket to acquire the temperature of the charging socket; the controller is in signal connection with the temperature sensor and the battery management system, and the controller is suitable for adjusting the cooling strength of the cooling assembly according to the current information and the temperature of the charging socket. Therefore, on one hand, the charging socket can be prevented from being overheated, and the charging safety is improved; on the other hand, the cooling intensity of the cooling assembly is more reasonable, so that the power consumption of the cooling assembly is more reasonable, and the energy consumption of the direct current charging control system can be effectively reduced.

Description

Direct current charging control system and control method for electric vehicle
Technical Field
The present invention relates to the field of vehicle technologies, and in particular, to a dc charging control system and a dc charging control method for an electric vehicle.
Background
In the related art, the existing electric vehicles are basically configured with a direct current charging function (fast charging), the charging time is longer and longer along with the increase of the capacity of the battery carried by the electric vehicle, the demand of a user for increasing the charging power is larger and larger, and the increase of the charging power inevitably increases the heat productivity.
Mention has already been made in GB/T18487-2015 of: in an application occasion with the rated charging current larger than 16A, the power supply socket and the vehicle socket are provided with temperature monitoring devices, and the power supply equipment and the electric vehicle have the functions of temperature detection and over-temperature protection.
The need for a cooling system is not mentioned, but the temperature monitoring is mentioned in the national standard, mainly because the charging power of domestic electric vehicles is still generally low when the national standard is regulated. With the rapid development of electric vehicles, the charging power has been rapidly increased, and when the charging power is larger and larger (e.g. above 300 kw), the safety requirement cannot be met by natural air cooling.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to provide a dc charging control system for an electric vehicle, which can efficiently cool a charging socket to improve charging safety.
The invention further provides a control method suitable for the direct current charging control system.
A direct current charging control system for an electric vehicle according to an embodiment of the present invention includes: a cooling assembly, a battery management system, a temperature sensor, and a controller; the cooling assembly is suitable for cooling a charging socket of the electric vehicle, and the cooling strength of the cooling assembly can be adjusted; the battery management system interacts with a charging pile to acquire current information of the charging pile; the temperature sensor is arranged in the charging socket to acquire the temperature of the charging socket; the controller is in signal connection with the temperature sensor and the battery management system, and the controller is suitable for adjusting the cooling strength of the cooling assembly according to the current information and the temperature of the charging socket.
According to the direct-current charging control system provided by the embodiment of the invention, the cooling strength of the cooling assembly is adjusted in real time according to the temperature of the charging socket, so that on the premise of meeting the requirement of quick charging, on one hand, the overheating of the charging socket can be avoided, and the charging safety is improved; on the other hand, the cooling intensity of the cooling assembly is more reasonable, so that the power consumption of the cooling assembly is more reasonable, and the energy consumption of the direct current charging control system can be effectively reduced.
According to some embodiments of the invention, the cooling assembly comprises: the cooling pipeline is at least partially embedded in the charging socket, and the speed regulating pump, the cooling liquid tank and the radiator are sequentially communicated through the cooling pipeline; wherein the cooling liquid is stored in the cooling liquid box, the radiator is suitable for cooling the cooling liquid after heat exchange, and the speed regulating pump is suitable for regulating the flow rate of the cooling liquid in the cooling pipeline.
In some embodiments, the governor pump includes a plurality of speed steps, and the controller is adapted to control the governor pump to switch the speed steps.
In some embodiments, the cooling assembly further comprises: a heat dissipation fan disposed opposite the heat sink to provide a cooling airflow toward the heat sink.
Further, the cooling fan comprises a plurality of rotating speed gears, and the controller is suitable for controlling the cooling fan to switch the rotating speed gears.
According to some embodiments of the invention, the temperature sensor comprises: a first sensor adapted to measure a temperature of a positive terminal of the charging receptacle and a second sensor adapted to measure a temperature of a negative terminal of the charging receptacle.
In some embodiments, the charging pile, the battery management system and the controller are connected through a CAN bus, and the temperature sensor and the cooling assembly are electrically connected with the controller.
According to the control method of the dc charging control system according to the embodiment of the second aspect of the present invention, the control method of the dc charging control system is applied to the dc charging control system for an electric vehicle described in the above embodiment, and includes:
s1: acquiring a positive electrode temperature T of the positive electrode terminal detected by the temperature sensorposNegative temperature T of negative terminalnegThe charging pileCharging current Ichrg；
S2: comparison TposAnd TnegObtaining the maximum value T of the charging temperaturemax；
S3: the controller will TmaxAnd IchrgComparing with the calibration value to generate XpwmA target PWM signal is generated to control a speed gear of a speed regulating pump of the cooling assembly.
Further, the control method further includes:
A1：55＞Xpwmif the speed is more than 50, a cooling fan of the cooling assembly starts a low-speed gear;
A2：Xpwmif the speed is more than 65, starting a high-speed gear by the cooling fan;
A3：Xpwm< 40, the cooling fan is turned off.
Optionally, after charging, the speed regulating pump is turned off in a delayed manner, and the delay time is equal to TmaxCorresponding, and the time delay is less than or equal to Ymax，3min≤Ymax≤5min。
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a DC charging control system according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method of the dc charging control system according to the embodiment of the invention;
fig. 3 is a control flowchart of a cooling fan of the dc charging control system according to an embodiment of the present invention;
fig. 4 is a control curve table of the cooling fan of the dc charging control system according to the embodiment of the invention.
Reference numerals:
a dc charging control system 100, a charging socket 200, a charging post 300,
a cooling assembly 10, a speed regulating pump 11, a cooling liquid tank 12, a radiator 13, a radiator fan 14, a cooling pipeline 15,
the battery management system 20 is provided with a battery management system,
the temperature of the liquid in the liquid tank is measured by a temperature sensor 30,
controller 40, CAN bus 50, wiring harness 60.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A dc charging control system 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 3.
As shown in fig. 1, a direct current charging control system 100 for an electric vehicle according to an embodiment of the present invention includes: cooling assembly 10, battery management system 20, temperature sensor 30, and controller 40.
Wherein the cooling module 10 is adapted to cool the charging inlet 200 of the electric vehicle, and the cooling intensity of the cooling module 10 can be adjusted; the battery management system 20 interacts with the charging pile 300 to acquire current information of the charging pile 300; the temperature sensor 30 is provided in the charging inlet 200 to acquire the temperature of the charging inlet 200; the controller 40 is in signal connection with the temperature sensor 30 and the battery management system 20, and the controller 40 is adapted to adjust the cooling intensity of the cooling assembly 10 according to the current information and the temperature of the charging socket 200.
Specifically, the battery management system 20(BMS) is adapted to monitor the output current of the charging pile 300 and the temperature of the charging socket 200 in real time, and then determines the cooling intensity required for heat dissipation of the charging socket 200 according to the temperature of the charging socket 200 and the output current of the charging pile 300, and adjusts the cooling module 10 to the cooling intensity, so as to avoid overheating of the charging socket 200, and improve the charging safety on the premise of satisfying the charging efficiency.
The cooling strength means a heat exchange capability of the cooling module 10 in a unit time, and the higher the cooling strength is, the stronger the heat exchange capability is, and further, the cooling strength of the cooling module 10 is adjusted, so that the heat dissipation efficiency of the charging socket 200 can be improved.
According to the direct-current charging control system 100 provided by the embodiment of the invention, the cooling strength of the cooling assembly 10 is adjusted in real time according to the temperature of the charging socket 200, so that on the premise of meeting the requirement of quick charging, on one hand, the charging socket 200 can be prevented from being overheated, and the charging safety is improved; on the other hand, the cooling strength of the cooling module 10 is more reasonable, so that the power consumption of the cooling module 10 is more reasonable, and the energy consumption of the dc charging control system 100 can be effectively reduced.
In the particular embodiment shown in fig. 1, the cooling assembly 10 includes: a cooling pipeline 15 at least partially embedded in the charging socket 200, and a speed regulating pump 11, a cooling liquid tank 12 and a radiator 13 which are sequentially communicated through the cooling pipeline 15; wherein, the cooling liquid is stored in the cooling liquid tank 12, the radiator 13 is suitable for cooling the cooling liquid after heat exchange, and the speed regulating pump 11 is suitable for regulating the flow rate of the cooling liquid in the cooling pipeline 15.
In other words, the cooling pipeline 15 connects the speed regulating pump 11, the coolant tank 12, the radiator 13, and the charging socket 200 in sequence to form a cooling flow path, and further pumps the coolant in the cooling tank into the charging socket 200 through the speed regulating pump 11 to cool the charging socket 200, and the coolant flowing out of the charging socket 200 enters the radiator 13 and flows back to the coolant tank 12 after sufficient heat exchange in the radiator 13, so that uninterrupted, stable, and reliable heat dissipation is achieved for the charging socket 200 through the cooling circulation loop.
Further, the controller 40 determines the cooling intensity of the cooling module 10 according to the current information of the charging pile 300 and the temperature information of the charging socket 200, and further generates a PWM signal, and controls the flow rate of the cooling liquid of the speed regulating pump 11 through the PWM signal to adjust the cooling intensity.
See table below:
Figure BDA0002302960950000041
Figure BDA0002302960950000051
specifically, the abscissa in the table is the charging current of the charging pile 300, the ordinate is the temperature of the charging socket 200, the data in the table is corresponding PWM signals, and the controller 40 is internally calibrated with related quantities, so that after receiving the charging current of the charging pile 300 and the temperature of the charging socket, the controller 40 compares the charging current with the data in the table to determine the corresponding PWM signals, so as to control the speed regulating pump 11 to adjust the flow rate of the cooling liquid, thereby adjusting the cooling intensity.
It should be noted that, in a pulse cycle of the speed regulating pump 11, the proportion of the energization time to the total time is between 0 and 100, and the corresponding duty ratio is 0% to 100%, where the PWM signal refers to the pulse signal sent toward the speed regulating pump 11 and includes a duty ratio value to adjust the energization time of the speed regulating pump 11 in a pulse cycle, so as to adjust the output power of the speed regulating pump 11 to change the flow rate of the cooling liquid.
It will be understood that X in the above tablepwmThe lower corner marks of the values correspond to a duty ratio value, which is not explicitly shown in the table, and the duty ratio values of the vehicles with different charging powers need to be calibrated before leaving the factory.
In summary, on the premise of improving the cooling effect of the cooling module 10, the PWM signal received by the speed regulating pump 11 is more reasonable, so as to improve the working environment of the speed regulating pump 11 and improve the working stability of the cooling module 10.
Of course, the invention is not limited in this regard and in other embodiments, the governor pump 11 includes a plurality of speed steps and the controller 40 is adapted to control the governor pump 11 to switch speed steps. That is to say, in other embodiments, the rotation speed of the speed regulating pump 11 can be adjusted, and then can be switched among a plurality of speed gears according to the use requirement, so as to achieve the adjustment of the flow rate of the cooling liquid.
In the particular embodiment shown in fig. 1, the cooling assembly 10 further comprises: a heat radiation fan 14, the heat radiation fan 14 being disposed opposite to the heat sink 13 to provide a cooling air flow toward the heat sink 13. By providing the heat dissipation fan 14, the cooling rate of the heat sink 13 can be increased, so that the cooling liquid in the heat sink 13 can be dissipated more quickly, thereby reducing the average temperature of the cooling liquid and further improving the cooling effect.
It is understood that the radiator fan 14 includes a plurality of speed steps, and the controller 40 is adapted to control the radiator fan 14 to switch the speed steps. Therefore, the heat radiation fan 14 is adjusted to work under a reasonable gear according to the use requirement, and the energy consumption can be further reduced.
Wherein, the rotational speed gear includes at least: high gear and low gear.
According to some embodiments of the invention, the temperature sensor 30 comprises: a first sensor adapted to measure a temperature of the positive terminal of the charging jack 200 and a second sensor adapted to measure a temperature of the negative terminal of the charging jack 200. In this way, the temperature of the positive terminal and the temperature of the negative terminal are measured by the first sensor and the second sensor respectively, and the measurement result is more accurate, so that the working stability and the reliability of the direct current charging control system 100 can be improved.
Wherein, fill electric pile 300, battery management system 20, controller 40 and pass through CAN bus 50 and connect, and temperature sensor 30, cooling module 10 are connected with controller 40 through pencil 60 electricity.
As shown in fig. 2, according to the control method of the dc charging control system 100 according to the embodiment of the second aspect of the present invention, the control method of the dc charging control system 100 is applied to the dc charging control system 100 for an electric vehicle in the above-described embodiment, and includes:
s1: the positive electrode temperature T of the positive electrode terminal detected by the temperature sensor 30 is acquiredposNegative temperature T of negative terminalnegCharging current I of charging pile 300chrg；
S2: comparison TposAnd TnegObtaining the maximum value T of the charging temperaturemax；
S3: the controller 40 will TmaxAnd IchrgComparing with the calibration value to generateXpwmValue, a target PWM signal is generated to control the speed gear of the governor pump 11 of the cooling package 10.
Thus, the temperature of the charging socket 200 can be obtained more accurately, and the output power of the speed regulating pump 11 can be adjusted reasonably, so that the cooling assembly 10 can work reasonably and stably.
As shown in fig. 2, the control method further includes:
A1：55＞Xpwmthe cooling fan 14 of the cooling assembly 10 is started to be in a low-speed gear position more than 50 deg;
A2：Xpwmif the speed is more than 65, the heat radiation fan 14 starts a high-speed gear;
A3：Xpwm< 40, the radiator fan 14 is turned off.
Therefore, the gear of the cooling fan 14 can be reasonably adjusted according to the use requirement, and the energy consumption can be further reduced on the premise of meeting the cooling requirement.
As shown in fig. 3 and 4, the controller 40 controls the radiator fan 14 to switch between the high gear and the low gear while generating the PWM signal.
Specifically, in XpwmWhen the heat radiation is less than 40 hours, the heat radiation fan 14 is closed, and the independent heat radiation of the heat radiator 13 can meet the cooling requirement at XpwmBetween 40-65, the cooling fan 14 is maintained at the low gear position, XpwmAfter the speed exceeds 65, the radiator fan 14 is turned on.
The hysteresis control loop is shown in FIG. 4 at XpwmWhen the temperature drops below 55, the cooling fan 14 is switched to the low-speed gear and maintains the low-speed gear at XpwmWhen the temperature drops below 40, the radiator fan 14 is turned off.
It can be understood that after the charging is finished, the speed regulating pump 11 is turned off in a delayed way, and the time length of the delayed way is TmaxCorresponding, and the time delay is less than or equal to Ymax，3min≤YmaxLess than or equal to 5 min. Thus, after the charging is finished, the speed regulating pump 11 continues to work for a period of time, so that the temperature is sufficiently reduced, and the charging safety can be further improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A direct current charge control system for an electric vehicle, comprising:
a cooling assembly adapted to cool a charging socket of the electric vehicle, and a cooling intensity of the cooling assembly can be adjusted;
the battery management system interacts with the charging pile to acquire current information of the charging pile;
a temperature sensor disposed within the charging socket to obtain a temperature of the charging socket;
the controller is in signal connection with the temperature sensor and the battery management system, and the controller is suitable for adjusting the cooling strength of the cooling assembly according to the current information and the temperature of the charging socket.
2. The direct current charge control system for an electric vehicle according to claim 1, characterized in that the cooling assembly comprises: the cooling pipeline is at least partially embedded in the charging socket, and the speed regulating pump, the cooling liquid tank and the radiator are sequentially communicated through the cooling pipeline; wherein
The cooling liquid is stored in the cooling liquid box, the radiator is suitable for cooling the cooling liquid after heat exchange, and the speed regulating pump is suitable for regulating the flow speed of the cooling liquid in the cooling pipeline.
3. The direct current charge control system for an electric vehicle according to claim 2, wherein the governor pump includes a plurality of speed steps, and the controller is adapted to control the governor pump to switch the speed steps.
4. The direct current charge control system for an electric vehicle according to claim 2, characterized in that the cooling assembly further comprises: a heat dissipation fan disposed opposite the heat sink to provide a cooling airflow toward the heat sink.
5. The direct current charging control system for an electric vehicle according to claim 4, wherein the radiator fan includes a plurality of speed steps, and the controller is adapted to control the radiator fan to switch the speed steps.
6. The direct current charge control system for an electric vehicle according to claim 1, characterized in that the temperature sensor includes: a first sensor adapted to measure a temperature of a positive terminal of the charging receptacle and a second sensor adapted to measure a temperature of a negative terminal of the charging receptacle.
7. The direct current charge control system for an electric vehicle according to any one of claims 1 to 6, wherein the charging pile, the battery management system, and the controller are connected by a CAN bus, and the temperature sensor and the cooling module are electrically connected to the controller by a wire harness.
8. A control method of a direct current charge control system, characterized in that the control method of the direct current charge control system is applied to the direct current charge control system for an electric vehicle according to any one of claims 1 to 7, comprising:
s1: acquiring a positive electrode temperature T of the positive electrode terminal detected by the temperature sensorposNegative temperature T of negative terminalnegCharging current I of charging pilechrg；
S2: comparison TposAnd TnegObtaining the maximum value T of the charging temperaturemax；
S3: the controller will TmaxAnd IchrgComparing with the calibration value to generate XpwmA target PWM signal is generated to control a speed gear of a speed regulating pump of the cooling assembly.
9. The control method of the dc charging control system according to claim 8, characterized by further comprising:
A1：55＞Xpwmif the speed is more than 50, a cooling fan of the cooling assembly starts a low-speed gear;
A2：Xpwmif the speed is more than 65, starting a high-speed gear by the cooling fan;
A3：Xpwm< 40, the cooling fan is turned off.
10. The control method of the dc charging control system according to claim 9, wherein the speed-adjusting pump is turned off in a delayed manner after the charging is completed, and the delay time is equal to TmaxCorresponding, and the time delay is less than or equal to Ymax，3min≤Ymax≤5min。
CN201911228801.2A 2019-12-04 2019-12-04 Direct current charging control system and control method for electric vehicle Pending CN112895959A (en)

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CN116546799A (en) * 2023-07-04 2023-08-04 天津广瑞达汽车电子有限公司 Charging pile heat treatment method and system based on real-time infrared image data
CN116546799B (en) * 2023-07-04 2023-09-01 天津广瑞达汽车电子有限公司 Charging pile heat treatment method and system based on real-time infrared image data

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