CN114211994B - Charging detection circuit, charging detection method and vehicle - Google Patents
Charging detection circuit, charging detection method and vehicle Download PDFInfo
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- CN114211994B CN114211994B CN202111271377.7A CN202111271377A CN114211994B CN 114211994 B CN114211994 B CN 114211994B CN 202111271377 A CN202111271377 A CN 202111271377A CN 114211994 B CN114211994 B CN 114211994B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/66—Data transfer between charging stations and vehicles
- B60L53/665—Methods related to measuring, billing or payment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—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)
- Secondary Cells (AREA)
Abstract
The application discloses a charge detection circuit, a charge detection method and a vehicle, relates to the technical field of vehicles, and can reduce the cost of a charge circuit under the condition of being compatible with European standard charge and national standard charge. A charge detection circuit comprising: the micro-control unit comprises an European standard charging detection end and a national standard charging detection end; the European standard detection circuit is characterized in that one end of the European standard detection circuit is used for being connected with a European standard charging gun, and the other end of the European standard detection circuit is electrically connected with the European standard charging detection end; and one end of the national standard detection circuit is used for being connected with a national standard charging gun, and the other end of the national standard detection circuit is electrically connected with the national standard charging detection end.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to a charging detection circuit, a charging detection method and a vehicle.
Background
At present, in the market of electric automobile, satisfy the vehicle that compatible national standard charges and European standard charges and need set up converter EVCC (Electric Vehicle Communication Controller), through EVCC and European standard electric pile that fills carry out the communication, conversion CAN communication and BMS (Battery Management System ) realize data interaction simultaneously, realize the charging of quick charge mode. However, EVCC is costly and consumes significant power in operation.
Disclosure of Invention
The embodiment of the application provides a charging detection circuit, a charging detection method and a vehicle, which can reduce the cost of the charging circuit under the condition of being compatible with European standard charging and national standard charging.
In a first aspect of embodiments of the present application, there is provided a charge detection circuit, including:
the micro-control unit comprises an European standard charging detection end and a national standard charging detection end;
the European standard detection circuit is characterized in that one end of the European standard detection circuit is used for being connected with a European standard charging gun, and the other end of the European standard detection circuit is electrically connected with the European standard charging detection end;
and one end of the national standard detection circuit is used for being connected with a national standard charging gun, and the other end of the national standard detection circuit is electrically connected with the national standard charging detection end.
In some implementations, the charge detection circuit provided in the embodiments of the present application further includes:
a fast charge detection circuit;
a slow charge detection circuit;
the micro control unit further comprises a fast charge enabling end and a slow charge enabling end, the fast charge enabling end is electrically connected with the fast charge detection circuit, and the slow charge enabling end is electrically connected with the slow charge detection circuit.
In some embodiments, the euro-standard charge detection terminal comprises a euro-standard signal detection terminal and a euro-standard charge mode detection terminal, and the euro-standard detection circuit comprises a euro-standard signal detection unit, and the euro-standard signal detection unit is electrically connected with the euro-standard signal detection terminal.
In some embodiments, the euro-javelin signal detection unit comprises at least two voltage dividing resistors, wherein at least one voltage dividing resistor is used for being electrically connected with a fixed potential, at least one voltage dividing resistor is used for being grounded, and the euro-javelin charging mode detection end is connected between at least two voltage dividing resistors.
In some embodiments, the slow charge enabling terminal comprises a first enabling terminal and a second enabling terminal, the slow charge detection circuit comprises a full-connection detection unit and a half-connection detection unit, the half-connection detection unit is electrically connected with the first enabling terminal, and the full-connection detection unit is electrically connected with the second enabling terminal;
the fast charge detection circuit is electrically connected with the fast charge enabling end.
In some embodiments, the full-connection detection unit comprises a first switching device and a first detection resistor, the half-connection detection unit comprises a second switching device and a second detection resistor, the first switching device is connected in series with the first detection resistor, the second switching device is connected in series with the second detection resistor, and the resistance value of the first detection resistor is different from the resistance value of the second detection resistor; and/or the number of the groups of groups,
the quick charge connection detection circuit comprises a third switching device and a third detection resistor, and the third switching device is connected with the third detection resistor in series.
In some embodiments, the first switching device comprises a MOS transistor, and/or the second switching device comprises a MOS transistor, and/or the third switching device comprises a MOS transistor.
In a second aspect of the embodiments of the present application, a charging detection method is provided, including:
the charging detection circuit according to the first aspect is used to determine a type of a charging gun inserted into a vehicle, wherein if the euro charging detection end detects a voltage signal, the type of the charging gun is determined to be an euro charging gun, and if the national charging detection end detects a voltage signal, the type of the charging gun is determined to be a national charging gun.
In some embodiments, where the charge detection circuit includes a fast charge detection circuit and a slow charge detection circuit, the method further includes:
and determining a charging mode by using the fast charging detection circuit and the slow charging detection circuit, wherein the charging mode comprises a fast charging mode and a slow charging mode.
In a third aspect of the embodiments of the present application, there is provided a vehicle including:
the charge detection circuit according to the first aspect;
and the battery management system is electrically connected with the charging detection circuit.
The charging detection circuit, the charging detection method and the vehicle provided by the embodiment of the application can be compatible with detection of European standard charging guns and detection of national standard charging guns, and can save the component cost generated by setting the EVCC without confirming the type of the charging guns by means of the EVCC, and can also avoid extra power consumption generated by adopting the EVCC, save the circuit component cost of the charging detection circuit and reduce the running power consumption of the charging detection circuit.
Drawings
Fig. 1 is a schematic block diagram of a charge detection circuit according to an embodiment of the present application;
fig. 2 is a schematic block diagram of another charge detection circuit according to an embodiment of the present application;
fig. 3 is a schematic block diagram of still another charge detection circuit according to an embodiment of the present application;
fig. 4 is a schematic flowchart of a charging detection method according to an embodiment of the present application.
Detailed Description
In order to better understand the technical solutions provided by the embodiments of the present specification, the following detailed description of the technical solutions of the embodiments of the present specification is made through the accompanying drawings and the specific embodiments, and it should be understood that the specific features of the embodiments of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and not limit the technical solutions of the present specification, and the technical features of the embodiments of the present specification may be combined with each other without conflict.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. The term "two or more" includes two or more cases.
At present, in electric automobile's market, satisfy the vehicle that compatible national standard charges and European standard charges and need set up converter EVCC, through EVCC and European standard electric pile that fills carry out the communication, conversion CAN communication and BMS realize data interaction simultaneously, realize charging of quick charge mode. However, EVCC is costly and consumes significant power in operation.
In view of this, the embodiments of the present application provide a charging detection circuit, a charging detection method, and a vehicle, which can reduce the cost of the charging circuit under the condition of being compatible with the euro standard charging and the national standard charging.
In a first aspect of the embodiments of the present application, a charge detection circuit is provided, and fig. 1 is a schematic block diagram of the charge detection circuit provided in the embodiments of the present application. As shown in fig. 1, a charge detection circuit provided in an embodiment of the present application includes: the micro-control unit 100, the micro-control unit 100 comprises an European standard charging detection end 110 and a national standard charging detection end 120; the European standard detection circuit 200, one end of the European standard detection circuit 200 is used for being connected with a European standard charging gun, and the other end of the European standard detection circuit 200 is electrically connected with the European standard charging detection end 110; the national standard detection circuit 300, one end of the national standard detection circuit 300 is used for accessing the national standard charging gun, and the other end is electrically connected with the national standard charging detection end 120.
For example, the micro control unit 100 may determine whether the euro standard charging gun is connected to the euro standard detecting circuit 200 electrically connected to the euro standard charging detecting terminal 110 by detecting whether the euro standard charging detecting terminal 110 has an electrical signal, and if the electrical signal is detected, it may determine that the inserted charging gun is the euro standard charging gun, otherwise, it is not the euro standard charging gun. The micro control unit 100 may further determine whether the national standard detection circuit 300 electrically connected to the national standard charging detection terminal 120 is connected to the national standard charging gun by detecting whether the national standard charging detection terminal 120 has an electrical signal, if the electrical signal is detected, it may be determined that the inserted charging gun is the national standard charging gun, otherwise, it is not the national standard charging gun. Aiming at the prior art, an EVCC needs to be added for a charging circuit meeting national standard charging and European standard charging modes, however, the EVCC needs to be awakened through a whole vehicle key or a European standard gun, and a charging controller of the whole vehicle, such as BMS (battery management system) and OBC (on Board charger), is awakened through the EVCC to realize the whole vehicle awakening; in addition, a PLC (programmable logic controller) module is added on the EVCC, communication is carried out between the PLC module and the European standard charging pile, and meanwhile CAN communication and BMS interaction are converted, so that quick charging is realized; the mode wakes the EVCC by using the whole vehicle key, so that the EVCC is in a wake-up state when not charged, and the power consumption of the whole vehicle is increased. Waking up the EVCC using the europaea charging gun increases the circuit construction cost of the EVCC. The EVCC and PLC communication is required in the euro-standard charging mode, and the connection of the hardware lines is increased and the failure risk is increased when the communication is transferred to the BMS through the CAN communication. To the problem that prior art exists, the detection circuitry that charges that this application embodiment provided can compatible European standard charge the detection of rifle and national standard charge the detection of rifle, need not to carry out the conversion that European standard charges the rifle with the help of EVCC, can save the produced assembly cost of setting up EVCC, can also avoid because the extra consumption that adopts EVCC to produce, can practice thrift the circuit assembly cost of detection circuitry that charges to and the running power consumption of whole charging system.
The charging detection circuit provided by the embodiment of the application can be compatible with the detection of the European standard charging gun and the detection of the national standard charging gun, the conversion of European standard charging is not needed by means of the EVCC, the component cost generated by the EVCC can be saved, the extra power consumption generated by adopting the EVCC can be avoided, the circuit component cost of the charging detection circuit can be saved, the running power consumption of the whole charging system can be reduced, and the failure risk of the charging system can be reduced.
In some implementations, fig. 2 is a schematic block diagram of another charge detection circuit provided in an embodiment of the present application, where the charge detection circuit provided in the embodiment of the present application further includes: a fast charge detection circuit 400; a slow charge detection circuit 500; the micro control unit 100 further includes a fast charge enable terminal 130 and a slow charge enable terminal 140, the fast charge enable terminal 130 is electrically connected to the fast charge detection circuit 400, and the slow charge enable terminal 140 is electrically connected to the slow charge detection circuit 500.
For example, if it is determined that the inserted charging gun is the euro standard charging gun, the control of the fast charge detection circuit 400 and the slow charge detection circuit 500 to detect whether the euro standard slow charge mode or the euro standard fast charge mode is implemented by controlling the output voltages of the fast charge enable terminal 130 and the slow charge enable terminal 140, respectively, through the micro control unit 100. If it is determined that the inserted charging gun is the national standard charging gun, the micro control unit 100 controls the output voltages of the fast charge enable terminal 130 and the slow charge enable terminal 140 to realize the control of the fast charge detection circuit 400 and the slow charge detection circuit 500 to detect whether the national standard slow charge mode or the national standard fast charge mode, respectively. The battery charging device can be charged after the charging mode is detected, the fast charging detection circuit 400 and the slow charging detection circuit 500 can be connected into the BMS, the BMS can detect the charging mode through the fast charging detection circuit 400 and the slow charging detection circuit 500, and after the detection is completed, the BMS can continue to complete charging.
The charge detection circuit provided in this embodiment of the present application sets up the fast charge detection circuit 400 and the slow charge detection circuit 500, and respectively controls the output voltages of the fast charge enabling terminal 130 and the slow charge enabling terminal 140 through the micro control unit 100 to realize controlling the fast charge detection circuit 400 and the slow charge detection circuit 500 to detect whether to be in a slow charge mode or a fast charge mode, and can continue to detect the charge mode after determining the type of the charging gun, and can continue to complete charging after confirming the charge mode. The conversion of charging communication is not needed by means of the EVCC, so that the component cost generated by setting the EVCC can be saved, the additional power consumption generated by adopting the EVCC can be avoided, the circuit component cost of the charging detection circuit can be saved, and the running power consumption of the charging detection circuit can be reduced.
In some implementations, fig. 3 is a schematic block diagram of still another charging detection circuit provided in the embodiment of the present application, as shown in fig. 3, where the euro-standard charging detection end includes a euro-javelin signal detection end f and an euro-standard charging mode detection end g, and the euro-javelin detection circuit includes a euro-javelin signal detection unit 210, where the euro-javelin signal detection unit 210 is electrically connected to the euro-javelin signal detection end f; the national standard charging detection end comprises a first national standard gun signal detection end p1, a second national standard gun signal detection end p2, a third national standard gun signal detection end p3 and a fourth national standard gun signal detection end p4. Illustratively, the national standard gun signal circuit 310 may further include a first slow charge signal terminal cc and a second slow charge signal terminal cp2 for detecting a slow charge signal, which are respectively and correspondingly connected to the first national standard gun signal detection terminal p1 and the second national standard gun signal detection terminal p2 of the micro control unit 100. The national javelin signal circuit 310 may further include a first fast charge signal terminal a+ and a second fast charge signal terminal cc2 for detecting a fast charge signal, respectively connected to the third national javelin signal detection terminal p3 and the fourth national javelin signal detection terminal p4 of the micro control unit 100. The javelin signal circuit 310 may further include a ground GND correspondingly connected to the ground of the micro control unit 100.
For example, the euro-javelin signal detecting terminal f may detect a voltage signal of the charging gun through the euro-javelin signal detecting unit 210, and if it is detected that the voltage is within the euro-javelin connection voltage range, it is determined that the inserted charging gun is the euro-javelin, and otherwise, it is not the euro-javelin. The national standard charging detection end can detect a voltage signal of the charging gun, if the voltage can be detected to be in the connection voltage range of the national standard charging gun, the national standard charging gun is connected, the insertion of the national standard charging gun is confirmed, and otherwise, the national standard charging gun is not inserted. The europaea charging mode detection end g can be used for detecting a charging mode signal of the europaea charging gun, and if a PWM waveform signal can be detected, and the PWM waveform duty ratio is 5%, the charging is fast, and the duty ratio is 9.5% -96.5%, and the charging is slow. If the first national standard gun signal detection end p1 and the second national standard gun signal detection end p2 detect that the electric signals of the first slow charge signal end cc and the second slow charge signal end cp2 are in the national standard slow charge signal range, judging that the national standard slow charge is carried out; if the third and fourth javelin signal detection terminals p3 and p4 detect that the electric signals of the first and second quick charge signal terminals a+ and cc2 are within the national standard signal range, the national standard quick charge is determined.
The charging detection circuit provided by the embodiment of the application sets up the European standard rifle signal detection end f, the European standard charging mode detection end g and the national standard charging detection end on the micro control unit 100, can determine the type and the corresponding charging mode of the inserted charging gun through detecting corresponding signals, can replace the function of EVCC, and is compatible with European standard charging and national standard charging.
In some embodiments, the dart signal detection unit comprises at least two voltage dividing resistors, wherein at least one voltage dividing resistor is used for electrically connecting a fixed potential, at least one voltage dividing resistor is used for grounding, and the dart charging mode detection terminal is connected between the at least two voltage dividing resistors.
For example, with continued reference to fig. 3, the javelin signal detection unit 210 includes a first voltage dividing resistor R1 and a second voltage dividing resistor R2, where the first voltage dividing resistor R1 is connected in series with the second voltage dividing resistor R2, the first voltage dividing resistor R1 is connected to a fixed potential V1, the fixed potential V1 may have a value of 5V, and the second voltage dividing resistor R2 is grounded. The dart signal generating terminal pp and the dart signal detecting terminal f of the dart signal circuit 220 can be connected between the first voltage dividing resistor R1 and the second voltage dividing resistor R2. If the euro-javelin signal circuit 220 inserts the euro-javelin, a euro-javelin signal is generated, the euro-javelin signal detecting terminal f of the micro control unit 100 can detect a voltage signal, and the detected voltage signal is within the range of the euro-javelin connection voltage signal, so that the inserted charging gun can be determined as the euro-javelin. The euro standard charging mode detection terminal g is electrically connected with the euro standard gun charging waveform generation terminal cp1, and the euro standard fast charging or the euro standard slow charging is judged by detecting the PWM waveform and the PWM waveform duty ratio by the euro standard charging mode detection terminal g of the micro control unit 100.
For example, the resistance of the first voltage dividing resistor R1 may be 330 Ω and the resistance of the second voltage dividing resistor R2 may be 2.7kΩ. The European javelin signal generating end pp is connected with the second voltage dividing resistor R2 in parallel and then connected with the first voltage dividing resistor R1 in series.
In some embodiments, with continued reference to fig. 3, the slow charge enable terminal includes a first enable terminal a and a second enable terminal b, the slow charge detection circuit includes a full connection detection unit and a half connection detection unit, the half connection detection unit is electrically connected with the first enable terminal a, and the full connection detection unit is electrically connected with the second enable terminal b; the fast charge detection circuit is electrically connected with the fast charge enabling end e.
In some embodiments, with continued reference to fig. 3, the fully-connected detection unit includes a first switching device M1 and a first detection resistor R8, the half-connected detection unit includes a second switching device M2 and a second detection resistor R7, the first switching device M1 is connected in series with the first detection resistor R8, the second switching device M2 is connected in series with the second detection resistor R7, and the resistance value of the first detection resistor R8 is different from the resistance value of the second detection resistor R7;
the fast charge connection detection circuit comprises a third switching device M3 and a third detection resistor R9, and the third switching device M3 is connected with the third detection resistor R9 in series.
In some embodiments, with continued reference to fig. 3, the first switching device M1 comprises a MOS transistor, and/or the second switching device M2 comprises a MOS transistor, and/or the third switching device M3 comprises a MOS transistor. For example, the gate G of the first switching device M1 may be connected to the second enable terminal b, and the drain d is connected to the first detection resistor R8; the grid electrode G of the second switching device M2 can be connected with the first enabling end a, and the drain electrode d is connected with the second detection resistor R7; the gate G of the third switching device M3 may be connected to the fast charge enable terminal e, and the drain d is connected to the third detection resistor R9.
For example, when the low-speed charging of the euro standard is detected, if the euro standard charging gun is completely connected with the euro standard detection circuit, and the resistance of the first voltage dividing resistor R1 may be 330 Ω, and the resistance of the second voltage dividing resistor R2 may be 2.7kΩ, the resistance to ground of the euro standard signal generating end pp detected by the euro standard signal detecting end f is 150 Ω, the euro standard signal generating end pp is connected in parallel with the second voltage dividing resistor R2 and then connected in series with the first voltage dividing resistor R1, and the fixed potential V1 provides power for the micro control unit 100 and the euro standard detection circuit, so as to realize the charging connection judgment by using the voltage detected by the euro standard signal detecting end f. Under the condition that the MOS tube is NMOS, the detection voltage of the detection end f of the Euro javelin signal is about 1.56V, the Euro javelin is judged to be completely connected at the moment, the first enabling end a and the second enabling end b are controlled to enable the first enabling end a to be output into a low level, the second enabling end b to be output into a high level, the MOS of the corresponding branch of the second enabling end b is enabled to be started through the first current limiting resistor R3 and the second current limiting resistor R4, the source S and the drain d are conducted, the MOS of the corresponding branch of the first enabling end a is closed, the ground resistance of the slow charging detection signal end CC is the first detection resistor R8, the resistance of the first detection resistor R8 can be 220 omega, when the ground resistance of the slow charging detection signal end CC is detected to be the resistance of the first detection resistor R8, the Euro javelin is judged to be a full-connection condition of Euro javelin quick charging, the detection result can be transmitted to the BMS, and the Euro javelin quick charging mode can be controlled to be charged.
It should be noted that, the resistors R5, R6 and R10 in fig. 3 can play a role in protecting the MOS transistor, so as to avoid the MOS transistor from being damaged by the instantaneous high voltage, and the capacitor C1 and the capacitor C2 can play a role in protecting the circuit, so as to avoid the circuit from being damaged by the instantaneous high voltage. The first enabling end a and the second enabling end b are connected to the grid electrode G of the MOS tube on the corresponding branch, the source electrode S of the MOS tube is grounded, the drain electrode d of the MOS tube of the corresponding branch of the first enabling end a is electrically connected with the second detection resistor R7, and the drain electrode d of the MOS tube of the corresponding branch of the second enabling end b is electrically connected with the first detection resistor R8.
When the euro-standard charging gun is in semi-connection, the euro-standard charging gun is determined to be in semi-connection when the euro-standard charging gun is in semi-connection, the resistance to ground of the euro-standard gun signal generating end pp detected by the euro-standard gun signal detecting end f is 480 Ω, the euro-standard gun signal generating end pp is connected with the second voltage dividing resistor R2 in parallel and then connected with the first voltage dividing resistor R1 in series, the euro-standard charging gun is determined to be in semi-connection when the euro-standard charging gun detecting end f detects voltage about 2.96V, the first enabling end a and the second enabling end b are controlled to output high level, the second enabling end b is output low level, the MOS of the branch corresponding to the first enabling end a is turned on through the first current limiting resistor R3 and the second current limiting resistor R4, the MOS of the branch corresponding to the source electrode S and the drain electrode d is turned off, the resistance of the slow charging detecting signal end CC to ground is the second detecting resistor R7, and the resistance of the second detecting resistor R7 can be 3.3kΩ. When the resistance of the slow charging detection signal end CC to the ground is detected to be the resistance value of the second detection resistor R7, the European standard charging gun is judged to be semi-connected, and the detection result can be transmitted to the BMS so as to control to stop charging, so that the conditions of damage of the charging gun or heating of a charging circuit and the like can be avoided, and the service life of the battery pack can be prolonged.
When the European standard charging gun is not accessed, the European standard gun signal generating end pp detected by the European standard gun signal detecting end f has infinite impedance to the ground, the European standard charging gun is judged to be not connected at the moment when the European standard gun signal detecting end f detects the voltage of about 0.55V, the first enabling end a and the second enabling end b are controlled to enable the first enabling end a to be output into a low level, the second enabling end b to be output into a low level, MOS of a branch corresponding to the first enabling end a is closed through the first current limiting resistor R3 and the second current limiting resistor R4, MOS of a branch corresponding to the second enabling end b is closed, impedance of a slow charging detecting signal end CC to the ground is judged to be infinite, and the European standard charging gun is judged to be not connected and is not charged.
When the euro standard charging gun is in the fast charging mode, the fast charging enabling end e is controlled to output a high level, after passing through the third current limiting resistor R11, the fast charging enabling end e is enabled to be opened corresponding to the MOS on the branch, the resistance of the fast charging detection signal end CC2 to the ground is enabled to be the third detection resistor R9, the resistance of the third detection resistor R9 can be 1kΩ, and when the resistance of the fast charging detection signal end CC2 to the ground is detected to be the third detection resistor R9, the euro standard fast charging gun is judged to be completely connected, and the euro standard fast charging is continued.
When the European standard charging gun is not connected, the European standard charging gun is similar to the slow charging detection circuit, the fast charging enabling end e is controlled to output low level, after the fast charging enabling end e passes through the third current limiting resistor R11, MOS on a corresponding branch of the fast charging enabling end e is closed, the resistance of the fast charging detection signal end CC2 to the ground is infinite, when the resistance of the fast charging detection signal end CC2 to the ground is infinite, the European standard fast charging gun is judged to be completely unconnected, and charging operation is not carried out.
For example, when performing the euro standard slow charging, the BMS detects the connection of the charging gun, controls the electronic lock to be closed, and realizes the charging; when carrying out the Europe standard and fill soon, BMS detects and charges the rifle and connect, and fill electric pile through PLC module and Europe standard and exchange, will fill electric pile mutual information conversion CAN information and inside charge the module and exchange, realize charging handshake, discern, flow such as charge.
For example, when the national standard charging gun is connected, the BMS detects whether the national standard charging gun is connected through the slow charging detection signal end CC, so that the national standard slow charging is realized. The BMS detects whether the national standard charging gun is connected or not through the quick charging detection signal end CC2, so that the national standard quick charging is realized.
The above exemplary descriptions are illustrative only and are not intended to be a specific limitation on the embodiments of the present application.
In a second aspect of the embodiments of the present application, a charging detection method is provided, and fig. 4 is a schematic flowchart of the charging detection method provided in the embodiments of the present application. As shown in fig. 4, a charge detection method provided in an embodiment of the present application includes:
s100, performing S100; with the charge detection circuit as described in the first aspect, the type of the charge gun inserted into the vehicle is determined, wherein if the euro charge detection end detects the voltage signal, the type of the charge gun is determined to be the euro charge gun, and if the national charge detection end detects the voltage signal, the type of the charge gun is determined to be the national charge gun.
The charging detection method provided by the embodiment of the application can be compatible with detection of European standard charging guns and detection of national standard charging guns, does not need to confirm the types of the charging guns by means of EVCC, can save the component cost generated by setting the EVCC, can also avoid extra power consumption generated by adopting the EVCC, can save the circuit component cost of a charging detection circuit, and reduces the running power consumption of the charging detection circuit.
In some embodiments, where the charge detection circuit includes a fast charge detection circuit and a slow charge detection circuit, the method further includes:
and determining a charging mode by using the fast charging detection circuit and the slow charging detection circuit, wherein the charging mode comprises a fast charging mode and a slow charging mode.
In a third aspect of the embodiments of the present application, there is provided a vehicle including:
the charge detection circuit according to the first aspect; and the battery management system is electrically connected with the charging detection circuit.
For example, referring to fig. 3, the battery management system may be electrically connected to the slow charge detection signal terminal CC and the fast charge detection signal terminal CC2, and receive an electrical signal of the detection result.
The vehicle provided by the embodiment of the application can be compatible with the detection of the European standard charging gun and the detection of the national standard charging gun, the type of the charging gun is not required to be confirmed by means of the EVCC, the assembly cost generated by the EVCC can be saved, the extra power consumption generated by adopting the EVCC can be avoided, the circuit assembly cost of the charging detection circuit can be saved, and the running power consumption of the charging detection circuit is reduced.
While preferred embodiments of the present description have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the disclosure.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present specification without departing from the spirit or scope of the specification. Thus, if such modifications and variations of the present specification fall within the scope of the claims and the equivalents thereof, the present specification is also intended to include such modifications and variations.
Claims (10)
1. A charge detection circuit, characterized by comprising:
the micro-control unit comprises an European standard charging detection end and a national standard charging detection end;
the European standard detection circuit is characterized in that one end of the European standard detection circuit is used for being connected with a European standard charging gun, and the other end of the European standard detection circuit is electrically connected with the European standard charging detection end;
the national standard detection circuit, one end of the national standard detection circuit is used for being connected with the national standard charging gun, and the other end of the national standard detection circuit is electrically connected with the national standard charging detection end;
a slow charge detection circuit;
the micro control unit comprises a slow charge enabling end, and the slow charge enabling end is electrically connected with the slow charge detection circuit;
the slow charge enabling end comprises a first enabling end and a second enabling end, the slow charge detecting circuit comprises a full-connection detecting unit and a half-connection detecting unit, the half-connection detecting unit is electrically connected with the first enabling end, and the full-connection detecting unit is electrically connected with the second enabling end;
the full-connection detection unit comprises a first switching device and a first detection resistor, the half-connection detection unit comprises a second switching device and a second detection resistor, the first switching device is connected with the first detection resistor in series, the second switching device is connected with the second detection resistor in series, and the resistance value of the first detection resistor is different from that of the second detection resistor.
2. The charge detection circuit of claim 1, further comprising:
a fast charge detection circuit;
the micro control unit further comprises a quick charge enabling end, and the quick charge enabling end is electrically connected with the quick charge detection circuit.
3. The charge detection circuit of claim 1, wherein the euro-standard charge detection terminal comprises a euro-standard signal detection terminal and an euro-standard charge mode detection terminal, the euro-standard detection circuit comprises a euro-standard signal detection unit, and the euro-standard signal detection unit is electrically connected with the euro-standard signal detection terminal.
4. The charge detection circuit of claim 3, wherein the euro-dart signal detection unit comprises at least two voltage dividing resistors, wherein at least one of the voltage dividing resistors is configured to be electrically connected to a fixed potential, at least one of the voltage dividing resistors is configured to be grounded, and the euro-dart charge mode detection terminal is connected between at least two of the voltage dividing resistors.
5. The charge detection circuit of claim 2, wherein,
the fast charge detection circuit is electrically connected with the fast charge enabling end.
6. The charge detection circuit of claim 5, wherein the charge detection circuit comprises a charge detector,
the quick charge connection detection circuit comprises a third switching device and a third detection resistor, and the third switching device is connected with the third detection resistor in series.
7. The charge detection circuit of claim 6, wherein the first switching device comprises a MOS transistor and/or the second switching device comprises a MOS transistor and/or the third switching device comprises a MOS transistor.
8. A charging detection method, characterized by comprising:
determining a type of a charging gun inserted into a vehicle by using the charging detection circuit according to any one of claims 1 to 7, wherein the type of the charging gun is determined to be an euro charging gun if the euro charging detection end detects a voltage signal, and the type of the charging gun is determined to be a national charging gun if the national charging detection end detects a voltage signal;
in the case where the charge detection circuit includes a slow charge detection circuit, a charge mode is determined using the slow charge detection circuit, wherein the charge mode includes a slow charge mode.
9. The charge detection method according to claim 8, wherein in a case where the charge detection circuit includes a quick charge detection circuit, the method further comprises:
and determining a charging mode by using the fast charging detection circuit and the slow charging detection circuit, wherein the charging mode comprises a fast charging mode.
10. A vehicle, characterized by comprising:
the charge detection circuit according to any one of claims 1 to 7;
and the battery management system is electrically connected with the charging detection circuit.
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| CN202111271377.7A CN114211994B (en) | 2021-10-29 | 2021-10-29 | Charging detection circuit, charging detection method and vehicle |
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| CN202111271377.7A CN114211994B (en) | 2021-10-29 | 2021-10-29 | Charging detection circuit, charging detection method and vehicle |
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| CN114987235B (en) * | 2022-07-19 | 2022-11-11 | 中国重汽集团济南动力有限公司 | European and national standard dual-purpose charging device and method |
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| CN104950204A (en) * | 2015-06-30 | 2015-09-30 | 郑州日产汽车有限公司 | Signal detection device for national standard charging gun |
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| CN103259299A (en) * | 2012-02-20 | 2013-08-21 | 伊顿公司 | Multi-standard compatible charger |
| CN205941731U (en) * | 2016-07-27 | 2017-02-08 | 东软集团股份有限公司 | Rifle detection device and electric automobile charge |
| CN206812826U (en) * | 2017-06-01 | 2017-12-29 | 凯迈(洛阳)电子有限公司 | A kind of Europe superscript national standard compatible type DC charging motor |
| CN107336632B (en) * | 2017-07-21 | 2023-06-30 | 厦门金龙旅行车有限公司 | Control method of electric vehicle combined charging system |
| CN207345508U (en) * | 2017-09-25 | 2018-05-11 | 合肥创宇新能源科技有限公司 | A kind of pure electric automobile high voltage control box device |
| CN110696666B (en) * | 2019-10-15 | 2021-08-20 | 爱驰汽车有限公司 | Charging control system and method for electric vehicle |
| CN112977143B (en) * | 2019-12-02 | 2022-08-30 | 北京新能源汽车股份有限公司 | Switching control box and charging parameter confirmation method |
| CN113212199B (en) * | 2020-01-21 | 2023-08-22 | 上海汽车集团股份有限公司 | Electric automobile communication controller, charging control system and method |
| TW202130527A (en) * | 2020-02-04 | 2021-08-16 | 飛宏科技股份有限公司 | Circuit and method for detecting control point abnormality of a dc charging pile |
| CN113103889A (en) * | 2021-05-17 | 2021-07-13 | 东风柳州汽车有限公司 | Automobile charging assembly and automobile |
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