CN110843592B - Alternating current charging signal control guiding device for electric automobile - Google Patents
Alternating current charging signal control guiding device for electric automobile Download PDFInfo
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- CN110843592B CN110843592B CN201911208260.7A CN201911208260A CN110843592B CN 110843592 B CN110843592 B CN 110843592B CN 201911208260 A CN201911208260 A CN 201911208260A CN 110843592 B CN110843592 B CN 110843592B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
Abstract
The invention provides an alternating current charging signal control guiding device for an electric automobile, which comprises: the MCU is connected with the detection circuit and the charging control circuit; the connection detection circuit is used for changing a CC potential value according to the capacity of a charging cable when the CC signal is received; the charging control circuit is used for changing the CP potential value into a preset CP high potential value when the CP signal is received, and changing the CP potential value according to the control of the MCU; the MCU is used for identifying CC and CP signals, judging whether a vehicle end charging interface is connected or not according to the potential of the CC signals and judging the capacity of a charging cable; judging whether the charging gun is connected or not and judging whether charging is possible or not according to the CP signal potential; after receiving the CC and CP signals, controlling the CP level to reach a preset CP potential value according to the received control signal; and controlling the charging gun to charge. The device has simpler structure and lower cost.
Description
Technical Field
The invention relates to the technical field of new energy automobile charging, in particular to an alternating current charging signal control guiding device for an electric automobile.
Background
The pure electric vehicle rapidly becomes the development direction of the new energy vehicle with the advantages of low energy consumption, low noise and zero emission, and has higher requirements on charging along with the development of the new energy vehicle industry. At present, alternating current charging of a new energy automobile is a main charging mode, and during alternating current charging, a charging gun needs to be connected and confirmed with a controller of the automobile in a charging mode so as to ensure that the charging gun is firmly connected and avoid the danger of electric leakage. The current controller has a relatively complex structure and relatively high cost.
Disclosure of Invention
Based on the above, the invention provides the alternating current charging signal control guiding device for the electric automobile, which has a simpler structure and lower cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
an alternating current charging signal control guiding device for an electric vehicle comprises:
the MCU is connected with the detection circuit and the charging control circuit; the MCU is respectively connected with the connection detection circuit and the charging control circuit;
the connection detection circuit is used for keeping the CC potential at a preset CC high level value when the CC signal is not received; changing a value of the CC potential according to a capacity of a charging cable upon receiving the CC signal;
the charging control circuit is used for keeping the CP potential at a preset CP low level value when the CP signal is not received; when the CP signal is received, changing the potential value of the CP into a preset high potential value of the CP, and changing the potential value of the CP according to the control of the MCU;
the MCU is used for identifying CC and CP signals, judging whether a vehicle end charging interface is connected or not according to the potential of the CC signals and judging the capacity of a charging cable; judging whether the charging gun is connected or not and judging whether charging is possible or not according to the CP signal potential; after receiving the CC and CP signals, controlling the CP level to reach a preset CP potential value according to the received control signal; and controlling the charging gun to charge.
The further improvement of the scheme is as follows: the charge control circuit includes:
CP signal filtering, including capacitance C1; the capacitor C1 is respectively connected with a CP signal and the ground;
an anti-reverse voltage circuit including a diode; the anode of the diode is connected with a CP signal, and the cathode of the diode is respectively connected with a resistor R1, a resistor R2 and a resistor R3;
the pull-down circuit comprises a resistor R1, a resistor R2 and a triode; the resistor R1 is respectively connected with the cathode of the diode and the ground; the resistor R2 is connected with the triode in series; the base level of the triode is connected with the MCU, and the emitter level of the triode is grounded;
the voltage division circuit comprises a resistor R3 and a resistor R4 which are connected in series; one end of the R4 is grounded;
CP potential signal filtering, including capacitance C2; the capacitor C2 is connected in parallel with the R4;
the MCU is connected with the other end of the R4.
In the foregoing aspect, preferably, the connection detection circuit includes:
CC signal filtering, including capacitance C3; the capacitor C3 is respectively connected with a CC signal and the ground;
a pull-up circuit including a resistor R5; the resistor R5 is respectively connected with a CC signal and an input power supply;
the voltage dividing and current limiting circuit comprises a resistor R6 and a resistor R7 which are connected in series; the resistor R6 is connected with a CC signal, and one end of the resistor R7 is grounded;
CC potential signal filtering, including capacitance C4; the capacitor C4 is connected with the resistor R7 in parallel;
the MCU is connected with the other end of the R7.
In the above scheme, preferably, the MCU judges according to the CP signal potential, and when the CP signal potential is 0, the charging gun is not connected; and when the CP signal potential is 9V, the charging gun is connected.
In the above scheme, preferably, the MCU judges according to the CC signal potential, and when the CC signal potential is 12V, the vehicle end is not connected to the charging gun; and when the CC signal potential is 4.9V, the charging cable capacity is 16A.
In the foregoing scheme, preferably, the MCU determines, according to the CC signal potential, that when the CC signal potential is 2.2V, the charging cable has a charging pile capacity of 32A.
In the foregoing scheme, preferably, the preset CP potential value is 6V.
In the above scheme, preferably, the resistance ratio of the resistor R3 to the resistor R4 is 1 to 2.
According to the scheme, the control and guidance function of the new energy automobile in the charging process is realized through the MCU (micro control unit), the connection detection circuit and the charging control circuit, the structure is simple while various identification control functions are realized, only corresponding functions need to be realized, fewer required elements are needed, and the cost is lower.
Drawings
Fig. 1 is a schematic block diagram of an ac charging signal control and guidance apparatus for an electric vehicle according to an embodiment of the present invention;
fig. 2 is a circuit structure diagram of an ac charging signal control guidance device for an electric vehicle according to an embodiment of the present invention.
Wherein: c1, C2, C3 and C4 are capacitors; q1 is a triode; d1 is a reverse voltage prevention diode; r1, R2, R3, R4, R5, R6, R7 are resistors; IDN _ CP is CP potential; IDN _ CC is CC potential; VB is the input power.
Detailed Description
The technical solution of the present invention is further described with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 2, the embodiment of the present invention first illustrates the circuit structure and principle of the device of the present invention in a specific preferred embodiment.
The existing control is mostly composed of an operational amplifier, a field effect transistor, a diode, a large number of resistors and capacitors. The number of elements is large, the structure is complex and the cost is high.
The embodiment of the invention has simple structure and only needs a MCU (single chip microcomputer, namely a micro control unit) and two guide control circuits. As shown in fig. 1.
As shown in fig. 2. The embodiment of the invention is composed of an MCU, a diode, a triode, and a small amount of resistors and capacitors.
The CC and CP signals are signals of the new energy automobile charging pile. The capacitor C1 plays a role in filtering at the CP signal; d1 is a reverse voltage prevention diode; r1 is a pull-down resistor for CP signal voltage division; when the triode Q1 is opened, R2 is used as a pull-down resistor for pulling down the CP voltage; r3 and R4 form a voltage division circuit, and the divided signals are used for the single chip microcomputer to identify the CP state; c2 is used for eliminating electromagnetic interference and ensuring the stability of signals entering the singlechip.
The CC signal removing capacitor C3 plays a role in filtering; r5 is the voltage that is pulled high by default, ensuring that the port voltage is high in the absence of the CC signal; r6, R7 constitute the bleeder circuit, divide cc signal into MCU recognizable scope; c4 is used for eliminating electromagnetic interference and ensuring the stability of signals entering the singlechip.
Judging whether the vehicle end charging interface is connected or not and the capacity of a charging cable through the CC signal voltage; if the cc voltage is 12V, which means that the charging gun is not connected to the vehicle side, the voltage is affected by the external input power VB and remains high. If the cc voltage is 4.9V, it means a charging post having a charging cable capacity of 16A, and if the cc voltage is 2.2V, it means a charging post having a charging cable capacity of 32A.
The CC guide circuit mainly comprises four parts:
1. CC signal filtering, consisting of a capacitor C3;
2. the pull-up circuit is composed of a resistor R5;
3. a voltage dividing and current limiting circuit composed of R6 and R7;
4. the IND _ CC signal is filtered and consists of a capacitor C4.
Judging whether the charging gun is connected and can be charged or not through the CP signal;
| status of state | Whether the charging connection device is connected or not | Whether or not the vehicle can be charged | CP Signal |
| State 1 | Whether or not | Whether or not | The voltage is 0V |
| State 2 | Is that | Whether or not | The voltage is 9V |
| State 3 | Is that | Is that | The voltage is 6V |
The CP pilot circuit consists of five parts:
1. CP signal filtering, consisting of a capacitor C1;
2. the anti-reverse voltage circuit is composed of a diode D1;
3. the pull-down circuit consists of R1, R2 and Q1, in the table, Q1 is closed when the state is 1 and the state is 2,
q1 on state 3;
4. a voltage divider circuit including resistors R3 and R4;
5. the IDN _ CP signal is filtered and is formed by capacitor C2.
The MCU is mainly used for identifying CC and CP signals, corresponding control is carried out, the CP level is reduced from 9V to 6V aiming at the CP control triode Q1, and therefore the charging gun is controlled to realize charging.
According to the scheme, the control and guidance function of the new energy automobile in the charging process is realized through the MCU (micro control unit), the connection detection circuit and the charging control circuit, the structure is simple while various identification control functions are realized, only corresponding functions need to be realized, fewer required elements are needed, and the cost is lower.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. An alternating current charging signal control guiding device for an electric automobile is characterized by comprising:
the MCU is connected with the detection circuit and the charging control circuit; the MCU is respectively connected with the connection detection circuit and the charging control circuit;
the connection detection circuit is used for keeping the CC potential at a preset CC high level value when the CC signal is not received; changing a value of the CC potential according to a capacity of a charging cable upon receiving the CC signal;
the charging control circuit is used for keeping the CP potential at a preset CP low level value when the CP signal is not received; when the CP signal is received, changing the potential value of the CP into a preset high potential value of the CP, and changing the potential value of the CP according to the control of the MCU;
the MCU is used for identifying CC and CP signals, judging whether a vehicle end charging interface is connected or not according to the potential of the CC signals and judging the capacity of a charging cable; judging whether the charging gun is connected or not and judging whether charging is possible or not according to the CP signal potential; after receiving the CC and CP signals, controlling the CP level to reach a preset CP potential value according to the received control signal; controlling a charging gun to charge;
the charge control circuit includes:
CP signal filtering, including capacitance C1; the capacitor C1 is respectively connected with a CP signal and the ground;
an anti-reverse voltage circuit including a diode; the anode of the diode is connected with a CP signal, and the cathode of the diode is respectively connected with a resistor R1, a resistor R2 and a resistor R3;
the pull-down circuit comprises a resistor R1, a resistor R2 and a triode; the resistor R1 is respectively connected with the cathode of the diode and the ground; the resistor R2 is connected with the triode in series; the base electrode of the triode is connected with the MCU, and the emitting electrode of the triode is grounded;
the voltage division circuit comprises a resistor R3 and a resistor R4 which are connected in series; one end of the R4 is grounded;
CP potential signal filtering, including capacitance C2; the capacitor C2 is connected in parallel with the R4;
the MCU is connected with the other end of the R4;
the connection detection circuit includes:
CC signal filtering, including capacitance C3; the capacitor C3 is respectively connected with a CC signal and the ground;
a pull-up circuit including a resistor R5; the resistor R5 is respectively connected with a CC signal and an input power supply;
the voltage dividing and current limiting circuit comprises a resistor R6 and a resistor R7 which are connected in series; the resistor R6 is connected with a CC signal, and one end of the resistor R7 is grounded;
CC potential signal filtering, including capacitance C4; the capacitor C4 is connected with the resistor R7 in parallel;
the MCU is connected with the other end of the R7.
2. The alternating current charging signal control guiding device for the electric automobile according to claim 1, wherein the MCU judges according to CP signal potential that when the CP signal potential is 0, a charging gun is not connected; and when the CP signal potential is 9V, the charging gun is connected.
3. The alternating current charging signal control guiding device for the electric automobile according to claim 1, wherein the MCU judges according to CC signal potential that when the CC signal potential is 12V, a charging gun is not connected to a vehicle end; and when the CC signal potential is 4.9V, the charging cable capacity is 16A.
4. The alternating current charging signal control guiding device for the electric automobile as claimed in claim 1, wherein the MCU judges according to CC signal potential that when the CC signal potential is 2.2V, the charging pile with 32A charging cable capacity is charged.
5. The ac charging signal control guide device for electric vehicle according to claim 1, wherein the preset CP potential value is 6V.
6. The AC charging signal control guide device for the electric vehicle as claimed in claim 1, wherein the resistance ratio of the resistor R3 to the resistor R4 is 1 to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911208260.7A CN110843592B (en) | 2019-11-30 | 2019-11-30 | Alternating current charging signal control guiding device for electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911208260.7A CN110843592B (en) | 2019-11-30 | 2019-11-30 | Alternating current charging signal control guiding device for electric automobile |
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| CN110843592A CN110843592A (en) | 2020-02-28 |
| CN110843592B true CN110843592B (en) | 2021-04-02 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008123868A (en) * | 2006-11-13 | 2008-05-29 | Gs Yuasa Corporation:Kk | Cell voltage balancing device of secondary battery |
| CN102916464A (en) * | 2012-09-26 | 2013-02-06 | 中国电力科学研究院 | System for realizing communication between alternating-current charging device and electric vehicle |
| CN105922879A (en) * | 2016-04-28 | 2016-09-07 | 江苏吾度新能源科技有限公司 | Charging guide device and method for alternating current charging pile |
| CN107478936A (en) * | 2017-09-01 | 2017-12-15 | 深圳市昭恒新能源技术有限公司 | A kind of electric vehicle alternating-current charging equipment detects circuit |
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2019
- 2019-11-30 CN CN201911208260.7A patent/CN110843592B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008123868A (en) * | 2006-11-13 | 2008-05-29 | Gs Yuasa Corporation:Kk | Cell voltage balancing device of secondary battery |
| CN102916464A (en) * | 2012-09-26 | 2013-02-06 | 中国电力科学研究院 | System for realizing communication between alternating-current charging device and electric vehicle |
| CN105922879A (en) * | 2016-04-28 | 2016-09-07 | 江苏吾度新能源科技有限公司 | Charging guide device and method for alternating current charging pile |
| CN107478936A (en) * | 2017-09-01 | 2017-12-15 | 深圳市昭恒新能源技术有限公司 | A kind of electric vehicle alternating-current charging equipment detects circuit |
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| CN110843592A (en) | 2020-02-28 |
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