CN114454742B - Intelligent charging system and charging method for electric automobile - Google Patents

Intelligent charging system and charging method for electric automobile Download PDF

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Publication number
CN114454742B
CN114454742B CN202210058073.0A CN202210058073A CN114454742B CN 114454742 B CN114454742 B CN 114454742B CN 202210058073 A CN202210058073 A CN 202210058073A CN 114454742 B CN114454742 B CN 114454742B
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China
Prior art keywords
charging
management system
battery management
contactor
socket
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CN202210058073.0A
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CN114454742A (en
Inventor
张成庆
马洪彦
孙希
刘磊
王贵山
王家雁
吴朝
王琪
张洪儒
李乐怡
沈振方
张卫兵
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Dongfeng Automobile Co Ltd
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Dongfeng Automobile 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
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • 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
    • B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
    • 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
    • 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
    • B60L2260/00—Operating Modes
    • B60L2260/40—Control modes
    • B60L2260/44—Control modes by parameter estimation
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The utility model provides an electric automobile intelligent charging system, including battery management system, many unification contactors, direct current fills electric pile with charging socket, charging robot is with charging socket, many unification contactors include a charging contactor, no. two charging contactor, battery management system's anodal is connected with the anodal that charges electric pile with charging socket through a charging contactor, be connected with charging robot's anodal through No. two charging contactor, battery management system's negative pole is connected with direct current charging pile with charging socket's negative pole, charging robot is with charging socket's negative pole, direct current charging pile is with charging socket, charging robot is with charging socket's signal output part is connected with battery management system's signal input part, battery management system's signal output part is connected with a charging contactor, no. two charging contactor's signal input part. The system can realize compatibility of the traditional direct-current charging pile and the intelligent charging robot, and charging is more convenient.

Description

Intelligent charging system and charging method for electric automobile
Technical Field
The invention belongs to the technical field of electric automobile charging, and particularly relates to an intelligent charging system and a charging method for an electric automobile, which are suitable for being compatible with two charging modes of a traditional direct-current charging pile and an intelligent charging robot, and improve charging convenience.
Background
At present, the charging mode of the electric automobile is mainly to manually insert a charging gun of a traditional direct-current charging pile into a charging socket, and along with popularization and application of the unmanned electric automobile, the charging mode is difficult to meet new charging requirements. To unmanned electric automobile evolution gradually goes out a portable intelligent charging robot, when unmanned electric automobile goes and has the demand of charging, intelligent charging robot can look for the vehicle position automatically, with the accurate pairing of corresponding socket on the car, accomplish automatic rifle charging. At present, an electric automobile which can be charged by adopting a traditional direct current charging pile and can be charged by adopting an intelligent charging robot is lacking in the market.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide an intelligent charging system and an intelligent charging method for an electric automobile, which are compatible with a traditional direct-current charging pile and an intelligent charging robot.
In order to achieve the above object, the present invention provides the following technical solutions:
the intelligent charging system comprises a battery management system, an all-in-one contactor, a charging socket for a direct current charging pile and a charging socket for a charging robot, wherein the all-in-one contactor comprises a first charging contactor and a second charging contactor, the positive electrode of the battery management system is connected with one end of the first charging contactor and one end of the second charging contactor, the other end of the first charging contactor and the other end of the second charging contactor are respectively connected with the positive electrode of the charging socket for the direct current charging pile and the positive electrode of the charging socket for the charging robot, and the negative electrode of the battery management system is connected with the negative electrode of the charging socket for the direct current charging pile and the negative electrode of the charging socket for the charging robot;
the signal output ends of the charging socket for the direct-current charging pile and the charging socket for the charging robot are connected with the signal input end of the battery management system, and the signal output end of the battery management system is connected with the signal input ends of the first charging contactor and the second charging contactor.
The positive electrode and the negative electrode of the charging socket for the direct-current charging pile are respectively provided with a first temperature sensor and a second temperature sensor, and signal output ends of the first temperature sensor and the second temperature sensor are connected with a signal input end of a battery management system.
The positive electrode and the negative electrode of the charging socket for the charging robot are respectively provided with a third temperature sensor and a fourth temperature sensor, and the signal output ends of the third temperature sensor and the fourth temperature sensor are connected with the signal input end of the battery management system.
The signal input end of the battery management system is connected with the signal output ends of the charging socket for the direct-current charging pile, the charging socket for the charging robot, the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor through the charging CAN wire, and the signal output end of the battery management system is connected with the signal input ends of the first charging contactor and the second charging contactor through the new energy CAN wire.
The charging method of the intelligent charging system of the electric automobile specifically comprises the following steps:
s1, when a charging gun of a direct current charging pile is inserted into a charging socket for the direct current charging pile or a charging gun of a charging robot is inserted into the charging socket for the charging robot, the direct current charging pile or the charging robot continuously outputs an A+ signal to wake up a battery management system, the battery management system is waken up and judges whether a charging mode admittance condition is met, if yes, a step S2 is entered, if not, a waking abnormality is reported, wherein the charging mode admittance condition is that one of a charging waking signal A+ 1 from the charging socket for the direct current charging pile and a charging waking signal A+ 2 from the charging socket for the charging robot is valid;
s2, when the charging wake-up signal A+1 is effective and the charging wake-up signal A+2 is ineffective, the battery management system enters a direct current charging pile charging mode, then enters a step S3, and when the charging wake-up signal A+1 is ineffective and the charging wake-up signal A+2 is effective, the battery management system enters a charging robot charging mode, then enters a step S4;
s3, the battery management system judges whether a charging connection confirmation signal CC2_1 from a charging socket for the direct-current charging pile is valid and a charging connection confirmation signal CC2_2 from a charging socket for the charging robot is invalid, if so, a first charging contactor is sucked until charging is completed, and if not, a charging connection abnormality is reported;
and S4, the battery management system judges whether a charging connection confirmation signal CC2_1 from a charging socket for the direct-current charging pile is invalid and a charging connection confirmation signal CC2_2 from a charging socket for the charging robot is valid, if so, the second charging contactor is attracted until the charging is completed, and if not, the abnormal charging connection is reported.
The positive electrode and the negative electrode of the charging socket for the direct-current charging pile are respectively provided with a first temperature sensor and a second temperature sensor, and the signal output ends of the first temperature sensor and the second temperature sensor are connected with the signal input end of the battery management system;
in step S3, after the battery management system enters the charging mode of the direct current charging pile, if it is detected that the T1+ signal from the first temperature sensor or the T1-signal from the second temperature sensor exceeds the design value, a fault alarm is sent.
The positive electrode and the negative electrode of the charging socket for the charging robot are respectively provided with a third temperature sensor and a fourth temperature sensor, and the signal output ends of the third temperature sensor and the fourth temperature sensor are connected with the signal input end of the battery management system;
in step S4, after the battery management system enters the charging mode of the charging robot, if it is detected that the T2+ signal from the third temperature sensor or the T2-signal from the fourth temperature sensor exceeds the design value, a fault alarm is sent.
In step S3, the direct current charging pile stops outputting an A+ signal after the charging is finished, the battery management system controls the first charging contactor to be disconnected, the charging is finished, and the charging gun is pulled out;
in step S4, the charging robot stops outputting the a+ signal after the charging is completed, the battery management system controls the second charging contactor to be disconnected, the charging is completed, and the charging gun is pulled out.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention discloses an intelligent charging system of an electric automobile, which comprises a battery management system, an all-in-one contactor, a charging socket for a direct current charging pile and a charging socket for a charging robot, wherein the all-in-one contactor comprises a first charging contactor and a second charging contactor, the positive electrode of the battery management system is connected with the positive electrode of the charging socket for the direct current charging pile through the first charging contactor, the positive electrode of the charging socket for the charging robot through the second charging contactor, the negative electrode of the battery management system is connected with the negative electrode of the charging socket for the direct current charging pile and the negative electrode of the charging socket for the charging robot, the signal output end of the charging socket for the direct current charging pile is connected with the signal input end of the battery management system, the signal output end of the battery management system is connected with the first charging contactor and the signal input end of the second charging contactor, the system can be compatible with the traditional direct current charging pile and the intelligent charging robot to charge the electric automobile, when charging is required, the battery management system judges whether a charging mode condition is met, and when the charging condition is met, the charging mode is confirmed through a method that the charging mode is carried out by a direct current charging pile is enabled, and a signal from a charging pile is enabled to be well, and a charging mode is enabled to be confirmed by a charging mode of a 2-CC2, and a 2 is enabled to be well through a method of confirming that a charging mode is enabled by a charging mode, and a charging mode is enabled by a 2-charging signal from a charging machine, and a charging mode is enabled by a charging device. Therefore, the invention not only can be compatible with the traditional direct-current charging pile and the intelligent charging robot to charge the electric automobile, but also has high charging safety.
2. In the intelligent charging system of the electric automobile, the positive electrode and the negative electrode of the charging socket for the direct-current charging pile are respectively provided with the first temperature sensor and the second temperature sensor, the signal output ends of the first temperature sensor and the second temperature sensor are connected with the signal input end of the battery management system, and after the battery management system enters a charging mode of the direct-current charging pile, if the T1 < + > signal from the first temperature sensor or the T1 < + > signal from the second temperature sensor is detected to exceed a design value, a fault alarm is sent out, and the design can prevent the safety problem caused by overhigh charging temperature, so that the charging safety is further improved. Therefore, the present invention further improves the charging safety.
Drawings
Fig. 1 is a schematic structural diagram of an intelligent charging system according to the present invention.
Fig. 2 is a schematic diagram of the intelligent charging system according to the present invention.
Fig. 3 is a flowchart of a charging method according to the present invention.
In the figure, a battery management system 1, an all-in-one contactor 2, a first charging contactor 21, a second charging contactor 22, a charging socket 3 for a direct current charging pile, a first temperature sensor 31, a second temperature sensor 32, a charging socket 4 for a charging robot, a third temperature sensor 41, and a fourth temperature sensor 42.
Detailed Description
The invention is further described below in connection with the following detailed description.
Referring to fig. 1 to 3, an intelligent charging system for an electric automobile comprises a battery management system 1, an all-in-one contactor 2, a charging socket 3 for a direct current charging pile and a charging socket 4 for a charging robot, wherein the all-in-one contactor 2 comprises a first charging contactor 21 and a second charging contactor 22, the positive electrode of the battery management system 1 is connected with one end of the first charging contactor 21 and one end of the second charging contactor 22, the other end of the first charging contactor 21 and the other end of the second charging contactor 22 are respectively connected with the positive electrode of the charging socket 3 for the direct current charging pile and the positive electrode of the charging socket 4 for the charging robot, and the negative electrode of the battery management system 1 is connected with the negative electrode of the charging socket 3 for the direct current charging pile and the negative electrode of the charging socket 4 for the charging robot;
the signal output ends of the charging socket 3 for the direct-current charging pile and the charging socket 4 for the charging robot are connected with the signal input end of the battery management system 1, and the signal output end of the battery management system 1 is connected with the signal input ends of the first charging contactor 21 and the second charging contactor 22.
The positive electrode and the negative electrode of the charging socket 3 for the direct current charging pile are respectively provided with a first temperature sensor 31 and a second temperature sensor 32, and the signal output ends of the first temperature sensor 31 and the second temperature sensor 32 are connected with the signal input end of the battery management system 1.
The positive electrode and the negative electrode of the charging socket 4 for the charging robot are respectively provided with a third temperature sensor 41 and a fourth temperature sensor 42, and the signal output ends of the third temperature sensor 41 and the fourth temperature sensor 42 are connected with the signal input end of the battery management system 1.
The signal input end of the battery management system 1 is connected with the signal output ends of the charging socket 3 for the direct-current charging pile, the charging socket 4 for the charging robot, the first temperature sensor 31, the second temperature sensor 32, the third temperature sensor 41 and the fourth temperature sensor 42 through a charging CAN wire, and the signal output end of the battery management system 1 is connected with the signal input ends of the first charging contactor 21 and the second charging contactor 22 through a new energy CAN wire.
The charging method of the intelligent charging system of the electric automobile specifically comprises the following steps:
s1, when a charging gun of a direct current charging pile is inserted into a charging socket 3 for the direct current charging pile or a charging gun of a charging robot is inserted into a charging socket 4 for the charging robot, the direct current charging pile or the charging robot continuously outputs an A+ signal to wake up a battery management system 1, the battery management system 1 is wakened up and judges whether a charging mode admittance condition is met, if yes, a step S2 is entered, if not, a wake-up abnormality is reported, wherein the charging mode admittance condition is that one of a charging wake-up signal A+ 1 from the charging socket 3 for the direct current charging pile and a charging wake-up signal A+ 2 from the charging socket 4 for the charging robot is valid;
s2, when the charging wake-up signal A+1 is effective and the charging wake-up signal A+2 is ineffective, the battery management system 1 enters a direct current charging pile charging mode, then enters a step S3, and when the charging wake-up signal A+1 is ineffective and the charging wake-up signal A+2 is effective, the battery management system 1 enters a charging robot charging mode, then enters a step S4;
s3, the battery management system 1 judges whether a charging connection confirmation signal CC2_1 from the charging socket 3 for the direct current charging pile is valid and a charging connection confirmation signal CC2_2 from the charging socket 4 for the charging robot is invalid, if yes, the first charging contactor 21 is sucked until the charging is completed, and if not, the abnormal charging connection is reported;
and S4, the battery management system 1 judges whether the charging connection confirmation signal CC2_1 from the charging socket 3 for the direct current charging pile is invalid and the charging connection confirmation signal CC2_2 from the charging socket 4 for the charging robot is valid, if yes, the second charging contactor 22 is attracted until the charging is completed, and if not, the abnormal charging connection is reported.
The positive electrode and the negative electrode of the charging socket 3 for the direct-current charging pile are respectively provided with a first temperature sensor 31 and a second temperature sensor 32, and the signal output ends of the first temperature sensor 31 and the second temperature sensor 32 are connected with the signal input end of the battery management system 1;
in step S3, after the battery management system 1 enters the dc charging pile charging mode, if it detects that the T1+ signal from the first temperature sensor 31 or the T1-signal from the second temperature sensor 32 exceeds the design value, a fault alarm is sent.
The positive electrode and the negative electrode of the charging socket 4 for the charging robot are respectively provided with a third temperature sensor 41 and a fourth temperature sensor 42, and the signal output ends of the third temperature sensor 41 and the fourth temperature sensor 42 are connected with the signal input end of the battery management system 1;
in step S4, after the battery management system 1 enters the charging mode of the charging robot, if it detects that the T2+ signal from the third temperature sensor 41 or the T2-signal from the fourth temperature sensor 42 exceeds the design value, a fault alarm is sent.
In step S3, after the charging is completed, the dc charging pile stops outputting the a+ signal, the battery management system 1 controls the first charging contactor 21 to be disconnected, the charging is completed, and the charging gun is pulled out;
in step S4, the charging robot stops outputting the a+ signal after the charging is completed, the battery management system 1 controls the second charging contactor 22 to be opened, the charging is completed, and the charging gun is pulled out.
The principle of the invention is explained as follows:
in the intelligent charging system of the electric automobile, the new energy CAN line is used for sending signals to the battery management system 1 to control the first charging contactor 21 and the second charging contactor 22 and transmitting the current charging mode to the whole automobile VCU, and the charging CAN line is used for carrying out communication interaction between the battery management system 1 and the charging socket 3 for the direct-current charging pile and the charging socket 4 for the charging robot based on the communication protocol between the GBT 27930-2015 electric automobile non-vehicle-mounted conductive charger and the battery management system.
In the intelligent charging system of the electric automobile, the temperature detection principle of the charging socket 3 for the direct current charging pile and the charging socket 4 for the charging robot is as follows: the positive pole and the negative pole of the charging socket 3 for the direct current charging pile and the charging socket 4 for the charging robot are embedded with NTC thermistors, the resistance of the NTC thermistors changes along with the temperature of the poles, and the battery management system judges the temperature of the positive pole and the negative pole by detecting the resistance of the NTC thermistors;
the detection principle of the charging connection confirmation is as follows: a specific detection circuit is designed among the charging socket 3 for the direct-current charging pile, the charging socket 4 for the charging robot and the charging gun, whether the charging gun is fully connected with the charging socket 3 for the direct-current charging pile or the charging socket 4 for the charging robot is judged by detecting the voltage of a specific measurement point, and a charging connection confirmation signal is generated in the part 1 of a GBT 18487.1-2015 electric automobile conduction charging system: the general requirements have clear requirements.
Example 1:
referring to fig. 1 to 3, an intelligent charging system for an electric automobile includes a battery management system 1, an all-in-one contactor 2, a charging socket 3 for a direct current charging pile, and a charging socket 4 for a charging robot, wherein the all-in-one contactor 2 includes a first charging contactor 21 and a second charging contactor 22, the positive electrode of the battery management system 1 is connected with one end of the first charging contactor 21 and one end of the second charging contactor 22, the other end of the first charging contactor 21 and the other end of the second charging contactor 22 are respectively connected with the positive electrode of the charging socket 3 for the direct current charging pile and the positive electrode of the charging socket 4 for the charging robot, the negative electrode of the battery management system 1 is connected with the negative electrode of the charging socket 3 for the direct current charging pile and the negative electrode of the charging socket 4 for the charging robot, the signal output end of the charging socket 3 for the direct current charging pile and the signal output end of the charging socket 4 for the charging robot are connected with the signal input end of the battery management system 1, and the signal output end of the battery management system 1 and the signal input end of the first charging contactor 21 and the second charging contactor 22 are respectively connected.
The charging method of the intelligent charging system of the electric automobile is sequentially carried out according to the following steps:
s1, when a charging gun of a direct current charging pile is inserted into a charging socket 3 for the direct current charging pile or a charging gun of a charging robot is inserted into a charging socket 4 for the charging robot, the direct current charging pile or the charging robot continuously outputs an A+ signal to wake up a battery management system 1, the battery management system 1 is wakened up and judges whether a charging mode admittance condition is met, if yes, a step S2 is entered, if not, a wake-up abnormality is reported, wherein the charging mode admittance condition is that one of a charging wake-up signal A+ 1 from the charging socket 3 for the direct current charging pile and a charging wake-up signal A+ 2 from the charging socket 4 for the charging robot is valid;
s2, when the charging wake-up signal A+1 is effective and the charging wake-up signal A+2 is ineffective, the battery management system 1 enters a direct current charging pile charging mode, then enters a step S3, and when the charging wake-up signal A+1 is ineffective and the charging wake-up signal A+2 is effective, the battery management system 1 enters a charging robot charging mode, then enters a step S4;
s3, the battery management system 1 judges whether a charging connection confirmation signal CC2_1 from a charging socket 3 for the direct current charging pile is valid and a charging connection confirmation signal CC2_2 from a charging socket 4 for the charging robot is invalid, if yes, a first charging contactor 21 is firstly sucked until charging is completed, then the direct current charging pile or the charging robot stops outputting an A+ signal, the battery management system 1 controls the first charging contactor 21 to be disconnected, charging is completed, a charging gun is pulled out, and if not, a charging connection abnormality is reported;
s4, the battery management system 1 judges whether a charging connection confirmation signal CC2_1 from the charging socket 3 for the direct current charging pile is invalid and a charging connection confirmation signal CC2_2 from the charging socket 4 for the charging robot is valid, if yes, the second charging contactor 22 is firstly attracted until the charging is completed, then the direct current charging pile or the charging robot stops outputting an A+ signal, the battery management system 1 controls the second charging contactor 22 to be disconnected, the charging is completed, the charging gun is pulled out, and if not, the charging connection abnormality is reported.
Example 2:
the difference from example 1 is that:
the positive electrode and the negative electrode of the charging socket 3 for the direct current charging pile are respectively provided with a first temperature sensor 31 and a second temperature sensor 32, the positive electrode and the negative electrode of the charging socket 4 for the charging robot are respectively provided with a third temperature sensor 41 and a fourth temperature sensor 42, and the signal input end of the battery management system 1 is connected with the signal output ends of the charging socket 3 for the direct current charging pile, the charging socket 4 for the charging robot, the first temperature sensor 31, the second temperature sensor 32, the third temperature sensor 41 and the fourth temperature sensor 42 through a charging CAN wire, and the signal output end of the battery management system 1 is connected with the signal input ends of the first charging contactor 21 and the second charging contactor 22 through a new energy CAN wire;
in step S3, after the battery management system 1 enters the dc charging pile charging mode, if it detects that the T1+ signal from the first temperature sensor 31 or the T1-signal from the second temperature sensor 32 exceeds the design value, a fault alarm is sent;
in step S4, after the battery management system 1 enters the charging mode of the charging robot, if it detects that the T2+ signal from the third temperature sensor 41 or the T2-signal from the fourth temperature sensor 42 exceeds the design value, a fault alarm is sent.

Claims (3)

1. An electric automobile intelligent charging system which characterized in that:
the intelligent charging system comprises a battery management system (1), an all-in-one contactor (2), a charging socket (3) for a direct current charging pile and a charging socket (4) for a charging robot, wherein the all-in-one contactor (2) comprises a first charging contactor (21) and a second charging contactor (22), the positive electrode of the battery management system (1) is connected with one end of the first charging contactor (21) and one end of the second charging contactor (22), the other end of the first charging contactor (21) and the other end of the second charging contactor (22) are respectively connected with the positive electrode of the charging socket (3) for the direct current charging pile and the positive electrode of the charging socket (4) for the charging robot, the negative electrode of the battery management system (1) is connected with the negative electrode of the charging socket (3) for the direct current charging pile, a first temperature sensor (31) and a second temperature sensor (32) are respectively arranged at the positive electrode and the negative electrode of the charging socket (3) for the direct current charging pile, and a fourth temperature sensor (41) are respectively arranged at the negative electrode and the fourth temperature sensor (42) of the charging robot;
the direct-current charging pile charging socket (3), the charging robot charging socket (4), the first temperature sensor (31), the second temperature sensor (32), the third temperature sensor (41) and the fourth temperature sensor (42) are connected with the signal input end of the battery management system (1), and the signal output end of the battery management system (1) is connected with the signal input ends of the first charging contactor (21) and the second charging contactor (22);
the charging method of the intelligent charging system specifically comprises the following steps:
s1, when a charging gun of a direct current charging pile is inserted into a charging socket (3) for the direct current charging pile or a charging gun of a charging robot is inserted into a charging socket (4) for the charging robot, the direct current charging pile or the charging robot continuously outputs an A+ signal to wake up a battery management system (1), the battery management system (1) is waken up and judges whether a charging mode admittance condition is met, if yes, a step S2 is entered, if not, a waking abnormality is reported, wherein the charging mode admittance condition is that one of a charging waking signal A+ 1 from the charging socket (3) for the direct current charging pile and a charging waking signal A+ 2 from the charging socket (4) for the charging robot is valid;
s2, when a charging wake-up signal A+1 is effective and A+2 is ineffective, the battery management system (1) enters a direct current charging pile charging mode, then enters a step S3, and when the charging wake-up signal A+1 is ineffective and A+2 is effective, the battery management system (1) enters a charging robot charging mode, then enters a step S4;
s3, the battery management system (1) judges whether a charging connection confirmation signal CC2_1 from a charging socket (3) for the direct-current charging pile is valid and a charging connection confirmation signal CC2_2 from a charging socket (4) for the charging robot is invalid, if so, a first charging contactor (21) is sucked until charging is completed, and if not, a charging connection abnormality is reported;
after the battery management system (1) enters a direct current charging pile charging mode, if a T1+ signal from a first temperature sensor (31) or a T1-signal from a second temperature sensor (32) is detected to exceed a design value, a fault alarm is sent;
s4, the battery management system (1) judges whether a charging connection confirmation signal CC2_1 from a charging socket (3) for the direct-current charging pile is invalid and a charging connection confirmation signal CC2_2 from a charging socket (4) for the charging robot is valid, if so, a second charging contactor (22) is sucked until the charging is completed, and if not, a charging connection abnormality is reported;
after the battery management system (1) enters a charging mode of the charging robot, if a T2+ signal from a third temperature sensor (41) or a T2-signal from a fourth temperature sensor (42) is detected to exceed a design value, a fault alarm is sent.
2. The intelligent charging system of an electric vehicle according to claim 1, wherein:
the signal input part of the battery management system (1) is connected with the signal output parts of the charging socket (3) for the direct-current charging pile, the charging socket (4) for the charging robot, the first temperature sensor (31), the second temperature sensor (32), the third temperature sensor (41) and the fourth temperature sensor (42) through a charging CAN wire, and the signal output part of the battery management system (1) is connected with the signal input parts of the first charging contactor (21) and the second charging contactor (22) through a new energy CAN wire.
3. The intelligent charging system of an electric vehicle according to claim 1, wherein:
in step S3, after the charging is completed, the dc charging pile stops outputting the a+ signal, the battery management system (1) controls the first charging contactor (21) to be disconnected, the charging is completed, and the charging gun is pulled out;
in step S4, the charging robot stops outputting the a+ signal after the charging is completed, the battery management system (1) controls the second charging contactor (22) to be disconnected, the charging is completed, and the charging gun is pulled out.
CN202210058073.0A 2022-01-19 2022-01-19 Intelligent charging system and charging method for electric automobile Active CN114454742B (en)

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