CN113715644A - Electric automobile direct current interface and charging system that charges - Google Patents
Electric automobile direct current interface and charging system that charges Download PDFInfo
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- CN113715644A CN113715644A CN202111073342.2A CN202111073342A CN113715644A CN 113715644 A CN113715644 A CN 113715644A CN 202111073342 A CN202111073342 A CN 202111073342A CN 113715644 A CN113715644 A CN 113715644A
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- Prior art keywords
- charging
- power supply
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- vehicle
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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
- B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a charging interface of an electric automobile, which comprises a power supply positive terminal, a power supply negative terminal, a protection grounding terminal, a first communication terminal, a second communication terminal, a charging confirmation terminal, a low-voltage auxiliary power supply positive terminal and a low-voltage auxiliary power supply negative terminal; the invention also discloses an electric vehicle charging system based on the charging interface, which comprises a charging loop, a communication loop and a low-voltage auxiliary power supply loop, wherein a first detection point and a second detection point are arranged in the system, and in the charging process, the vehicle judges whether the low-voltage power supply of the vehicle is normal or not according to the voltage of the second detection point and controls the communication between the vehicle and a charging device. Compared with the direct current interface widely used at present, the direct current charging system has the advantages that one mechanical jack and one energy consumption resistor are reduced, the energy consumption is lower, the heating value is lower, the safety is higher, and the structure and the control process of the charging system are simpler.
Description
Technical Field
The invention relates to a charging interface and a charging system, in particular to a charging interface and a charging system for direct-current charging of an electric automobile.
Background
New energy automobile uses the direct current to fill electric pile usually and charges, and the direct current of present widely used charges the interface and includes 9 jacks altogether, wherein has two to connect and confirms the jack, is used for confirming the connection of car end and stake end respectively, then issues the instruction, starts procedure on next step, and this jack is owing to connect the safety in order furthest's assurance high pressure, and two connection are confirmed the jack to the symmetry design, connect detection, affirmation, give-out command to car end and stake end respectively, and structure and control process are too redundant.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a direct current charging interface and a charging system with lower energy consumption.
The technical scheme is as follows: the direct-current charging interface of the electric automobile is used for connecting non-vehicle-mounted charging equipment and the electric automobile to be charged, the charging interface comprises a plug arranged on a charging gun of the non-vehicle-mounted charging equipment and a socket arranged on the side of the electric automobile, and the plug and the socket of the charging interface respectively comprise a power supply positive terminal, a power supply negative terminal, a protection grounding terminal, a first communication terminal, a second communication terminal, a charging confirmation terminal, a low-voltage auxiliary power supply positive terminal and a low-voltage auxiliary power supply negative terminal.
The electric vehicle charging system comprises the off-board charging equipment and the electric vehicle, wherein the off-board charging equipment is connected with the electric vehicle through the direct-current charging interface, the positive terminal of the power supply is connected with the positive terminal of the power supply of the off-board charging equipment and the positive terminal of the battery of the electric vehicle, and the negative terminal of the power supply is connected with the negative terminal of the power supply of the off-board charging equipment and the negative terminal of the battery of the electric vehicle; a first control switch is arranged between the positive terminal of the power supply and the positive terminal of the power supply of the non-vehicle-mounted charging equipment, and a fifth control switch is arranged between the positive terminal of the power supply and the positive terminal of the battery of the electric automobile; and a second control switch is arranged between the negative electrode end of the power supply and the negative electrode of the power supply of the non-vehicle-mounted charging equipment, and a sixth control switch is arranged between the negative electrode end of the power supply and the positive electrode of the battery of the electric automobile, so that a charging loop is formed.
The protective grounding end is connected with the power supply equipment grounding end and the vehicle chassis grounding end.
The first communication end is connected with the control device of the vehicle-mounted charging equipment and the vehicle control device through a CAN-H line, and the second communication end is connected with the control device of the off-board charging equipment and the vehicle control device through a CAN-L line to form a communication loop.
The charging confirmation end is electrically connected with a control device of the vehicle-mounted charging equipment, the connection confirmation end is also connected with a first resistor, and the other end of the first resistor unit is connected with a detection power supply to form a first detection point.
The vehicle control device is connected with a second detection power supply to form a second detection point; a second resistor and a normally closed switch are connected in series between the charging confirmation end and the grounding end of the power supply equipment; a third resistor is connected in series between the charging confirmation end and the grounding end of the power supply equipment; and a fourth resistor is connected in series between the charging confirmation terminal and the vehicle chassis grounding terminal.
The positive end of the low-voltage auxiliary power supply is connected with the positive electrode of the low-voltage auxiliary power supply of the off-board charging equipment and the vehicle control device, and the negative end of the low-voltage auxiliary power supply is connected with the negative electrode of the low-voltage auxiliary power supply of the off-board charging equipment and the vehicle control device, so that a low-voltage auxiliary power supply loop is formed.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: compared with a general direct current charging interface, the direct current charging interface has the advantages that a mechanical jack and an energy consumption resistor are reduced, the structure is simple, the energy consumption is lower, the heat productivity is lower, the safety is higher, and the structure and the control process of the electric automobile charging system are simplified.
Drawings
FIG. 1 is a schematic structural diagram of a charging interface according to the present invention;
fig. 2 is a circuit diagram of the charging system of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
As shown in fig. 1, the charging interface described in this embodiment includes 8 terminals: 1CC, 2S +, 3S-, 4DC +, 5DC-, 6A +, 7A-and 8PE, each terminal defined as follows:
TABLE 1 function and parameter table of each terminal
In the dc charging system of the electric vehicle according to the embodiment, as shown in fig. 2, the off-board charging device is connected to the electric vehicle via a charging interface,
in this embodiment, the resistance and voltage parameters in the control circuit are as follows: r1 ═ R2 ═ R3 ═ R4 ═ 1000 Ω, and pull-up voltage U1 ═ U2 ═ 12V.
The working process of the direct-current charging interface is as follows:
vehicle interface connection confirmation phase: when the operator presses the gun head button, the gun head button is inserted into the vehicle socket and then released. The charging pile at detection point 1 detects the level change of 12V-6V-4V. When detecting 4V, fill electric pile and will judge that the rifle that charges inserts successfully, the vehicle interface is connected completely to lock the electronic lock in the rifle that will charge, prevent that the rifle head from droing.
Direct current fills electric pile self-checking stage: after the vehicle interfaces are completely connected, the charging pile closes K3 and K4, so that the low-voltage auxiliary power supply loop is conducted to supply power for the electric vehicle control device (some vehicles do not need to supply power). And judging that the low-voltage power supply of the vehicle is normal according to the voltage of the monitoring point 2, and if the voltage value is 12V, starting to periodically send a communication handshake message by the vehicle device. And then closing the K1 and the K2, carrying out DC line insulation detection, after the insulation detection is finished, putting in a leakage loop to release energy, disconnecting the K1 and the K2, and simultaneously starting to periodically send communication handshake messages.
Charging ready phase: at this stage, the electric automobile and the direct-current charging pile are mutually configured, the vehicle controls K5 and K6 are closed, a charging loop is conducted, and when the charging pile detects that the voltage of the battery at the vehicle end is normal, namely the error of the voltage and the battery voltage described by the communication message is less than or equal to +/-5%, and the error is within the range of the maximum voltage and the minimum voltage output by the charging pile; and closing K1 and K2, and starting charging the electric automobile.
A charging stage: in the charging stage, the vehicle sends parameters of the battery charging demand to the charging pile in real time, the charging pile adjusts the charging voltage and current in real time according to the parameters, and sends respective state information including the output voltage and current of the charging pile, the voltage and current of the vehicle battery, the SOC and the like.
Claims (7)
1. The utility model provides an electric automobile direct current interface that charges for connect the off-board battery charging outfit and wait the electric automobile who charges, a serial communication port, the interface is including setting up the plug on the rifle that charges of off-board battery charging outfit and setting up the socket in the electric automobile side, the plug and the socket of the interface that charges all include power positive pole end (DC +), power negative pole end (DC-), protection earthing terminal (PE), first communication terminal (S +), second communication terminal (S-), charge affirmation end (CC), low pressure auxiliary power source positive pole end (A +) and low pressure auxiliary power source negative pole end (A-).
2. An electric vehicle charging system, which comprises an off-board charging device and an electric vehicle, wherein the off-board charging device is connected with the electric vehicle through a direct current charging interface according to claim 1, a positive power terminal (DC +) is connected with a positive power terminal of the off-board charging device and a positive battery terminal of the electric vehicle, and a negative power terminal (DC-) is connected with a negative power terminal of the off-board charging device and a negative battery terminal of the electric vehicle; a first control switch (K1) is arranged between the positive electrode end (DC +) of the power supply and the positive electrode of the power supply of the non-vehicle-mounted charging equipment, and a fifth control switch (K5) is arranged between the positive electrode end (DC +) of the power supply and the positive electrode of the battery of the electric vehicle; and a second control switch (K2) is arranged between the power supply negative electrode end (DC-) and the power supply negative electrode of the non-vehicle-mounted charging equipment, and a sixth control switch (K6) is arranged between the power supply negative electrode end (DC-) and the battery positive electrode of the electric automobile, so that a charging loop is formed.
3. The electric vehicle charging system according to claim 2, characterized in that the protection ground (PE) is connected to the power supply equipment ground and the vehicle chassis ground.
4. The electric vehicle charging system according to claim 2, wherein the first communication terminal (S +) is connected to the control device of the on-board charging device and the vehicle control device via a CAN-H line, and the second communication terminal (S-) is connected to the control device of the off-board charging device and the vehicle control device via a CAN-L line to form a communication loop.
5. The charging system of claim 2, wherein the charging confirmation terminal (CC) is electrically connected to the control device of the vehicle-mounted charging device, the connection confirmation terminal is further connected to a first resistor R1, and the other end of the first resistor unit is connected to a detection power source U1 to form a first detection point;
the vehicle control device is connected with a second detection power supply (U2) to form a second detection point;
a second resistor (R2) and a normally closed switch (S) are connected in series between the charging confirmation terminal (CC) and the ground terminal of the power supply equipment;
a third resistor (R3) is connected in series between the charging confirmation terminal (CC) and the ground terminal of the power supply equipment;
and a fourth resistor (R4) is connected in series between the charging confirmation terminal (CC) and the vehicle chassis ground terminal.
6. The electric vehicle charging system according to claim 2, wherein the positive terminal (a +) of the low-voltage auxiliary power supply is connected with a positive terminal of the low-voltage auxiliary power supply of the off-board charging equipment and a vehicle control device, and the negative terminal (a-) of the low-voltage auxiliary power supply is connected with a negative terminal of the low-voltage auxiliary power supply of the off-board charging equipment and the vehicle control device, so as to form a low-voltage auxiliary power supply loop.
7. The electric vehicle charging system of claim 5, wherein during charging, the vehicle determines whether the low-voltage power supply of the vehicle is normal according to the voltage of the second detection point, and the vehicle periodically sends a communication handshake message when the low-voltage power supply is normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111073342.2A CN113715644A (en) | 2021-09-14 | 2021-09-14 | Electric automobile direct current interface and charging system that charges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111073342.2A CN113715644A (en) | 2021-09-14 | 2021-09-14 | Electric automobile direct current interface and charging system that charges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113715644A true CN113715644A (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111073342.2A Pending CN113715644A (en) | 2021-09-14 | 2021-09-14 | Electric automobile direct current interface and charging system that charges |
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| Country | Link |
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| CN (1) | CN113715644A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105691223A (en) * | 2015-12-24 | 2016-06-22 | 中能易电新能源技术有限公司 | Charging device for automatically identifying electric vehicle charging voltage by charger |
| CN109765494A (en) * | 2017-11-05 | 2019-05-17 | 王正权 | A kind of electric automobile power battery rapid detection method and detection system |
| CN111697403A (en) * | 2019-07-31 | 2020-09-22 | 比亚迪股份有限公司 | Cable assembly and vehicle charging system |
| CN113246780A (en) * | 2021-02-02 | 2021-08-13 | 车库七号新能源科技(深圳)有限公司 | Direct current charging pile control system and method |
-
2021
- 2021-09-14 CN CN202111073342.2A patent/CN113715644A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105691223A (en) * | 2015-12-24 | 2016-06-22 | 中能易电新能源技术有限公司 | Charging device for automatically identifying electric vehicle charging voltage by charger |
| CN109765494A (en) * | 2017-11-05 | 2019-05-17 | 王正权 | A kind of electric automobile power battery rapid detection method and detection system |
| CN111697403A (en) * | 2019-07-31 | 2020-09-22 | 比亚迪股份有限公司 | Cable assembly and vehicle charging system |
| CN113246780A (en) * | 2021-02-02 | 2021-08-13 | 车库七号新能源科技(深圳)有限公司 | Direct current charging pile control system and method |
Non-Patent Citations (1)
| Title |
|---|
| 陈华超: "浅析吉利EV450车充电系统的功能及故障排除", 汽车维护与修理, pages 72 - 75 * |
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