CN218805270U - Vehicle-mounted charging device and electric automobile - Google Patents
Vehicle-mounted charging device and electric automobile Download PDFInfo
- Publication number
- CN218805270U CN218805270U CN202222928607.9U CN202222928607U CN218805270U CN 218805270 U CN218805270 U CN 218805270U CN 202222928607 U CN202222928607 U CN 202222928607U CN 218805270 U CN218805270 U CN 218805270U
- Authority
- CN
- China
- Prior art keywords
- circuit
- switch
- voltage
- vehicle
- charging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the application provides a vehicle-mounted charging device and an electric automobile, the vehicle-mounted charging device comprises an alternating current-to-direct current conversion module and a direct current conversion module, the direct current conversion module comprises a first power conversion circuit, a multiplexing circuit and an isolation transformation circuit, the multiplexing circuit comprises a first switch module, a second power conversion circuit and a boosting element, and the first switch module comprises a first switch device and a second switch device. The embodiment of the application can enable the automobile only supporting high-voltage quick charging to use the quick charging pile at the low-voltage level for charging.
Description
Technical Field
The application relates to the technical field of electronic circuits, in particular to a vehicle-mounted charging device and an electric automobile.
Background
In recent years, with the continuous mileage and the charging speed of the electric vehicle increasing, the vehicle enterprises gradually push out the high-voltage platform, and the voltage level of the power battery is increased from a low-voltage level (for example, 400V level) to a high-voltage level (for example, 800V level). Because of historical reasons, a large number of low-voltage-level quick-charging piles exist in the market, and therefore an automobile which only supports high-voltage quick charging cannot be charged when facing the low-voltage-level quick-charging pile, and user experience is influenced.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides an on-vehicle charging device and electric automobile for only support the car that high pressure was filled soon and also can use the quick electric pile that fills of low pressure level to charge.
A first aspect of the embodiments of the present application provides a vehicle-mounted charging apparatus, including an ac-to-dc conversion module and a dc conversion module, where the dc conversion module includes a first power conversion circuit, a multiplexing circuit, and an isolation transformer circuit, the multiplexing circuit includes a first switch module, a second power conversion circuit, and a boost element, and the first switch module includes a first switch device and a second switch device;
the first input end of the AC-DC conversion module is connected with a live wire of an AC charging interface, the second input end of the AC-DC conversion module is connected with a zero wire of the AC charging interface, the first output end of the AC-DC conversion module is connected with the first input end of the first power conversion circuit, the second output end of the AC-DC conversion module is connected with the second input end of the first power conversion circuit, the first output end of the first power conversion circuit is connected with the first output end of the isolation transformation circuit, the second output end of the first power conversion circuit is connected with the second input end of the isolation transformation circuit, the first output end of the isolation transformation circuit is communicated with the first input end of the second power conversion circuit through a first switch device, the second output end of the isolation transformation circuit is communicated with the second input end of the second power conversion circuit, the first output end of the second power conversion circuit is connected with the positive electrode of a power battery, and the second output end of the second power conversion circuit is connected with the negative electrode of the power battery; the first end of the boosting element is connected with the anode of the direct-current charging interface, and the second end of the boosting element is connected with the first input end of the second power conversion circuit through the second switching device; and the negative electrode of the direct current charging interface is connected with the negative electrode of the power battery.
Optionally, the first power conversion circuit is configured to convert an input first direct current voltage into a first alternating current voltage, where the first direct current voltage is a direct current voltage output by a first output end of the ac-to-dc conversion module;
the isolation transformation circuit is used for converting the first alternating voltage into a second alternating voltage;
the multiplexing circuit is configured to convert the second ac voltage into a second dc voltage when the first switching device is turned on and the second switching device is turned off, where the second dc voltage is output to the positive electrode of the power battery.
Optionally, the multiplexing circuit is further configured to convert a third dc voltage into a fourth dc voltage when the first switch device is turned off and the second switch device is turned on, where the fourth dc voltage is used to be output to the anode of the power battery, the fourth dc voltage is greater than the second dc voltage, the third dc voltage is smaller than the fourth dc voltage, and the third dc voltage is a dc voltage output by the anode of the dc charging interface.
Optionally, the multiplexing circuit is further configured to convert the positive voltage of the power battery into a fifth direct-current voltage under the condition that the first switch device is turned off and the second switch device is turned on, where the fifth direct-current voltage is used for being output to the direct-current charging interface, and the fifth direct-current voltage is smaller than the positive voltage of the power battery.
Optionally, the first switching module further includes a third switching device; and the third end of the boosting element is connected with the second input end of the second power conversion circuit through the third switching device.
Optionally, the second power conversion circuit includes a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, and a first capacitor; the boosting element comprises a first inductor and a second inductor;
the first end of the first switch device is connected with the first output end of the isolation transformer circuit, the second end of the first switch device is connected with the first end of the first switch tube, the first end of the second switch tube and the first end of the second switch device, the second end of the second switch device is connected with the first end of the first inductor, the second end of the first inductor is connected with the positive electrode of the direct-current charging interface and the first end of the second inductor, the second end of the second inductor is connected with the first end of the third switch device, the second end of the third switch device is connected with the second output end of the isolation transformer circuit, the first end of the third switch tube and the first end of the fourth switch tube, the second end of the first switch tube is connected with the second end of the third switch tube, the first end of the first capacitor and the positive electrode of the power battery, and the second end of the second switch tube is connected with the second end of the fourth switch tube, the second end of the first capacitor and the negative electrode of the power battery.
Optionally, when the vehicle-mounted charging device is in a slow charging mode, the first switching device is turned on, the second switching device and the third switching device are turned off, and the first switching tube, the second switching tube, the third switching tube and the fourth switching tube are in a rectifying mode;
when the vehicle-mounted charging device is in a fast charging and boosting mode, the first switching element is turned off, the second switching element and the third switching element are turned on, the first switching tube, the second switching tube and the first inductor form a first boosting circuit, and the third switching tube, the fourth switching tube and the second inductor form a second boosting circuit;
when the vehicle-mounted charging device is in a reverse charging mode, the first switch device is turned off, the second switch device and the third switch device are turned on, the first switch tube, the second switch tube and the first inductor form a first voltage reduction circuit, and the third switch tube, the fourth switch tube and the second inductor form a second voltage reduction circuit.
Optionally, the vehicle-mounted charging device further includes a second switch module, and the positive electrode of the dc charging interface is connected to the positive electrode of the power battery through the second switch module.
Optionally, when the second switch module is turned on and the first switch module is turned off, the positive electrode of the dc charging interface charges the positive electrode of the power battery.
Optionally, when the second switch module is turned on and the first switch module is turned off, the positive electrode of the power battery charges the positive electrode of the dc charging interface.
A second aspect of the embodiments of the present application provides an electric vehicle, including the vehicle-mounted charging device described in any one of the first aspects of the embodiments of the present application.
The vehicle-mounted charging device comprises an alternating current-to-direct current conversion module and a direct current conversion module, wherein the direct current conversion module comprises a first power conversion circuit, a multiplexing circuit and an isolation transformation circuit, the multiplexing circuit comprises a first switch module, a second power conversion circuit and a boosting element, and the first switch module comprises a first switch device and a second switch device; a first input end of the alternating current-to-direct current module is connected with a live wire of an alternating current charging interface, a second input end of the alternating current-to-direct current module is connected with a zero wire of the alternating current charging interface, a first output end of the alternating current-to-direct current module is connected with a first input end of the first power conversion circuit, a second output end of the alternating current-to-direct current module is connected with a second input end of the first power conversion circuit, a first output end of the first power conversion circuit is connected with a first output end of the isolation transformation circuit, a second output end of the first power conversion circuit is connected with a second input end of the isolation transformation circuit, a first output end of the isolation transformation circuit is communicated with a first input end of the second power conversion circuit through a first switch device, a second output end of the isolation transformation circuit is communicated with a second input end of the second power conversion circuit, a first output end of the second power conversion circuit is connected with an anode of a power battery, and a second output end of the second power conversion circuit is connected with a cathode of the power battery; the first end of the boosting element is connected with the anode of the direct-current charging interface, and the second end of the boosting element is connected with the first input end of the second power conversion circuit through the second switching device; and the negative electrode of the direct current charging interface is connected with the negative electrode of the power battery.
In the embodiment of the application, in the vehicle-mounted charging apparatus, by providing the voltage boosting element, the first switching device and the second switching device, the vehicle-mounted charging apparatus can operate in a slow charging mode (alternating current charging) when the first switching device is turned on and the second switching device is turned off; under the condition that the first switching device is turned off and the second switching device is turned on, the vehicle-mounted charging device can work in a fast charging and boosting mode (direct current charging), and when the voltage of the direct current charging interface is smaller than the charging voltage of the power battery, the voltage of the direct current charging interface can be boosted through the multiplexing circuit to charge the power battery. This on-vehicle charging device can work and fill the mode slowly, also can work and fill the mode that steps up soon for only supporting the car that the high pressure was filled soon and also can use the quick electric pile that fills of low pressure level to charge, provide user experience.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an in-vehicle charging device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another vehicle-mounted charging device provided in an embodiment of the present application;
FIG. 3 is a schematic structural diagram of another vehicle-mounted charging device provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of another vehicle-mounted charging device provided in the embodiment of the present application;
fig. 5 is a schematic structural diagram of another vehicle-mounted charging device provided in the embodiment of the present application;
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, system, article, or apparatus.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by a person skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle-mounted charging device according to an embodiment of the present disclosure. As shown in fig. 1, the vehicle-mounted charging device 100 includes an ac-to-dc conversion module 10 and a dc conversion module 20, the dc conversion module 20 includes a first power conversion circuit 21, a multiplexing circuit 22 and an isolation transformer circuit 23, the multiplexing circuit 22 includes a first switching module, a second power conversion circuit 221 and a boost element 222, the first switching module includes a first switching device K1 and a second switching device K2;
a first input end of the ac-to-dc module 10 is connected to a live wire of an ac charging interface, a second input end of the ac-to-dc module 10 is connected to a zero wire of the ac charging interface, a first output end of the ac-to-dc module 10 is connected to a first input end of the first power conversion circuit 21, a second output end of the ac-to-dc module 10 is connected to a second input end of the first power conversion circuit 21, a first output end of the first power conversion circuit 21 is connected to a first output end of the isolation transformer circuit 23, a second output end of the first power conversion circuit 21 is connected to a second input end of the isolation transformer circuit 23, a first output end of the isolation transformer circuit 23 is communicated with a first input end of the second power conversion circuit 221 through a first switching device K1, a second output end of the isolation transformer circuit 23 is communicated with a second input end of the second power conversion circuit 221, a first output end of the second power conversion circuit 221 is connected to a positive electrode of a power battery, and a second output end of the second power conversion circuit 221 is connected to a negative electrode of the power battery; a first end of the boosting element 222 is connected to the positive electrode of the dc charging interface, and a second end of the boosting element 222 is connected to the first input end of the second power conversion circuit 221 through the second switching device K2; and the negative electrode of the direct current charging interface is connected with the negative electrode of the power battery.
The in-vehicle charging device 100 may be an On Board Charger (OBC). The in-vehicle charging device 100 may be applied to an electric vehicle. At present, a vehicle-mounted charger is generally placed on an electric automobile, and the vehicle-mounted charger can convert alternating current provided by a slow charging pile into direct current to charge a power battery, so that the slow charging function is achieved. In the embodiment of the application, a part of circuits (the first switch module and the boost element 222) are added to the vehicle-mounted charging device 100, so that the vehicle-mounted charging device 100 has both an original slow charging function and a fast charging and boost function. In other words, the vehicle-mounted charging device 100 and the fast charging and boosting device are combined into one, the vehicle-mounted charging device 100 can multiplex most circuits in the second power conversion circuit 221, and compared with the discrete OBC and the fast charging and boosting device, the vehicle-mounted charging device 100 according to the embodiment of the present application has the advantages that the cost and the volume are greatly reduced, and good economic benefits are generated.
The ac-dc module 10 may include a rectifying circuit and a filtering circuit, and may convert ac power (e.g., 220V ac power) into stable dc power. The rectifier circuit may include any one of a diode rectifier circuit (e.g., a diode full-bridge rectifier circuit) and a MOS transistor rectifier circuit (e.g., a MOS transistor full-bridge rectifier circuit).
The first power conversion circuit 21 may include a plurality of switching tubes and capacitors, and may convert the dc voltage output by the ac-dc conversion module 10 into ac power (e.g., a square wave signal).
The second power conversion circuit 221 may include a plurality of switching tubes and capacitors, and may convert the ac power output from the isolation transformer circuit 23 into a stable dc voltage.
The isolation transformer circuit 23 may convert the alternating current output from the first power conversion circuit 21 into another alternating current. The isolation transformer circuit 23 may include an isolation transformer that may be stepped up or down by controlling the turn ratio of the winding to achieve conversion between alternating voltages. The isolation transformer circuit 23 can perform a boosting function of converting an ac voltage having a low effective value (the ac voltage output from the first power conversion circuit 21) into an ac voltage having a high effective value (the ac voltage output from the isolation transformer circuit 23). The isolation transformer circuit 23 can isolate the voltages at the input side and the output side of the isolation transformer circuit 23, so that the interference of the voltages at the two sides is avoided, and the isolation transformer circuit can be suitable for high-voltage use scenes.
The multiplexing circuit 22 can convert the alternating current output by the isolation transformer circuit 23 into direct current to charge the power battery.
The multiplexing circuit 22 may also boost the dc voltage output by the positive electrode of the dc charging interface to charge the power battery.
The alternating current charging interface can be connected with an alternating current charging pile (slow charging pile), and the alternating current charging interface can be connected with a zero line and a live wire of commercial power at the moment. When the ac charging interface is connected to the ac charging pile, ac power can be supplied to the ac-to-dc conversion module 10.
The dc charging interface may be connected to a dc charging pile (fast charging pile), and when the dc charging interface is connected to the dc charging pile, a dc voltage output from the dc charging interface is boosted by the boosting component 222 and the two-power conversion circuit 221, and then charges the power battery. If the fast-charging dc voltage supported by the power battery is 800V, and the dc charging pile can only provide 400V dc voltage, the voltage of 400V dc voltage provided by the dc charging pile can be boosted to 800V by the voltage boost element 222 and the two power conversion circuits 221 in the vehicle-mounted charging device 100 according to the embodiment of the present application, and then the power battery is charged.
The first and second switching devices K1 and K2 may be any one of a relay, an Insulated Gate Bipolar Transistor (IGBT), and a Metal-Oxide-Semiconductor (MOS) Transistor.
The boost element 222 may include at least one inductor. The Boost element 222 may form a Boost circuit (e.g., a Boost circuit) with a switching tube and a capacitor in the second power conversion circuit 221, so as to implement a fast charging and boosting function of the vehicle-mounted charging device 100.
In the embodiment of the application, in the vehicle-mounted charging apparatus, by providing the voltage boosting element, the first switching device and the second switching device, the vehicle-mounted charging apparatus can operate in a slow charging mode (alternating current charging) when the first switching device is turned on and the second switching device is turned off; under the condition that the first switching device is turned off and the second switching device is turned on, the vehicle-mounted charging device can work in a fast charging and boosting mode (direct current charging), and when the voltage of the direct current charging interface is smaller than the charging voltage of the power battery, the voltage of the direct current charging interface can be boosted through the multiplexing circuit to charge the power battery. The vehicle-mounted charging device can work in a slow charging mode and can also work in a fast charging and boosting mode, so that an automobile which only supports high-voltage fast charging can also use the fast charging pile of a low-voltage grade for charging.
Optionally, the first power conversion circuit 21 is configured to convert an input first direct current voltage into a first alternating current voltage, where the first direct current voltage is a direct current voltage output by a first output end of the ac-to-dc module 10;
the isolation transformer circuit 23 is configured to convert the first ac voltage into a second ac voltage;
the multiplexing circuit 22 is configured to convert the second ac voltage into a second dc voltage when the first switching device K1 is turned on and the second switching device K2 is turned off, where the second dc voltage is output to the anode of the power battery.
In the embodiment of the present application, under the condition that the first switching device K1 is turned on, the vehicle-mounted charging device 100 operates in the slow charging mode, and the power battery is charged through an ac charging pile (slow charging pile) connected to the ac charging interface. Meanwhile, the second switch device K2 is turned off, so that the power battery cannot be charged through a direct-current charging pile (quick-charging pile) connected with the direct-current charging interface.
The first switching device K1 is turned on, and the first switching device K1 may be closed. The second switching device K2 is turned off, and the second switching device K2 may be turned off.
Optionally, the multiplexing circuit 22 is further configured to convert a third dc voltage into a fourth dc voltage when the first switching device K1 is turned off and the second switching device K2 is turned on, where the fourth dc voltage is used to be output to the positive electrode of the power battery, the fourth dc voltage is greater than the second dc voltage, the third dc voltage is smaller than the fourth dc voltage, and the third dc voltage is a dc voltage output by the positive electrode of the dc charging interface.
In the embodiment of the application, the positive electrode of the direct current charging interface is connected with the quick charging pile, wherein the voltage provided by the quick charging pile is smaller than the charging voltage of the power battery.
Under the condition that the first switch device K1 is turned off and the second switch device K2 is turned on, the vehicle-mounted charging device 100 works in a boosting and quick charging mode, and the power battery is charged through a direct current charging pile (quick charging pile) connected with a direct current charging interface. Meanwhile, as the first switching device K1 is turned off, the power battery cannot be charged through an alternating-current charging pile (slow charging pile) connected with an alternating-current charging interface.
When the direct-current charging interface is connected with the quick charging pile, the power battery is on the power receiving side, and the quick charging pile connected with the direct-current charging interface is on the power transmitting side.
The in-vehicle charging device 100 may operate in the boost quick-charge mode. When the direct-current voltage (third direct-current voltage) output by the positive electrode of the direct-current charging interface is less than the charging voltage (fourth direct-current voltage) supported by the power battery, the vehicle-mounted charging device 100 can work in the boosting quick-charging mode, so that the power battery of the vehicle only supporting high-voltage quick-charging is charged by the quick-charging pile at the low-voltage level.
Optionally, the multiplexing circuit 22 is further configured to convert the positive voltage of the power battery into a fifth direct-current voltage under the condition that the first switch device K1 is turned off and the second switch device K2 is turned on, where the fifth direct-current voltage is used for being output to the direct-current charging interface, and the fifth direct-current voltage is smaller than the positive voltage of the power battery.
In this embodiment, the positive electrode of the dc charging interface may be connected to an electric device, the power battery is a power transmission side, the electric device connected to the dc charging interface is a power reception side, and the electric device may be a power battery of another electric vehicle or may be another type of load (for example, a load including at least one of a capacitor, a resistor, and an inductor).
When the first switch device K1 is turned off, the second switch device K2 is turned on, and the dc charging interface is connected to the power battery of another electric vehicle, the vehicle-mounted charging apparatus 100 may operate in the reverse charging mode. The reverse charging mode is a V2V (vehicle to vehicle) mode, i.e., a mode in which one electric vehicle charges another electric vehicle. Meanwhile, as the first switching device K1 is turned off, the power battery cannot be charged through an alternating-current charging pile (slow charging pile) connected with an alternating-current charging interface.
Referring to fig. 2, fig. 2 is a schematic structural diagram of another vehicle-mounted charging device according to an embodiment of the present disclosure. Fig. 2 is further obtained on the basis of fig. 1, and as shown in fig. 2, on the basis of fig. 1, the first switching module further includes a third switching device K3; a third terminal of the boosting element 222 is connected to a second input terminal of the second power conversion circuit 221 through the third switching device K3.
In the embodiment of the present application, the voltage boosting element 222 may include at least two inductors. The Boost element 222 may form two Boost circuits (for example, a Boost circuit) with a switching tube and a capacitor in the second power conversion circuit 221, so as to implement a fast charging and boosting function of the vehicle-mounted charging device 100.
Referring to fig. 3, fig. 3 is a schematic structural diagram of another vehicle-mounted charging device according to an embodiment of the present disclosure. Fig. 3 is further obtained based on fig. 2, and as shown in fig. 3, based on fig. 2, the second power conversion circuit 221 includes a first switch tube S1, a second switch tube S2, a third switch tube S3, a fourth switch tube S4, and a first capacitor C1; the boosting element 222 includes a first inductor L1 and a second inductor L2;
the first end of the first switch device K1 is connected to the first output end of the isolation transformer circuit 23, the second end of the first switch device K1 is connected to the first end of the first switch tube S1, the first end of the second switch tube S2 and the first end of the second switch device K2, the second end of the second switch device K2 is connected to the first end of the first inductor L1, the second end of the first inductor L1 is connected to the positive electrode of the dc charging interface and the first end of the second inductor L2, the second end of the second inductor L2 is connected to the first end of the third switch device K3, the second end of the third switch device K3 is connected to the second output end of the isolation transformer circuit 23, the first end of the third switch tube S3 and the first end of the fourth switch tube S4, the second end of the first switch tube S1 is connected to the second end of the third switch tube S3, the first end of the first capacitor C1 and the positive electrode of the power battery, and the second end of the second switch tube S2 is connected to the negative electrode of the second capacitor C1 and the power battery.
The first inductance L1 may comprise one inductive element or at least two parallel inductive elements. The second inductance L2 may comprise one inductive element or at least two parallel inductive elements.
In this embodiment, the first switching tube S1, the second switching tube S2, the third switching tube S3, and the fourth switching tube S4 may be MOS transistors. The switch tube in fig. 3 is an N-type Metal-Oxide-Semiconductor (N-Metal-Oxide-Semiconductor NMOS) transistor as an example. As can be seen from fig. 3, each switching tube is connected in parallel with a parasitic diode. The parasitic diode is due to the manufacturing process. In fig. 3, a parasitic diode is connected in parallel between the drain (D pole) and the source (S pole) of the NMOS transistor, the anode of the parasitic diode is connected to the source of the NMOS transistor, and the cathode of the parasitic diode is connected to the drain of the NMOS transistor. The gate (G pole) of the NMOS transistor in fig. 3 may be controlled by a controller, for example, the controller may control each NMOS transistor by a Pulse Width Modulation (PWM) signal, so as to adjust the magnitude of the dc voltage output by the second power conversion circuit 221.
Optionally, when the vehicle-mounted charging apparatus 100 is in a slow charging mode, the first switching device K1 is turned on, the second switching device K2 and the third switching device K3 are turned off, and the first switching tube S1, the second switching tube S2, the third switching tube S3 and the fourth switching tube S4 are in a rectifying mode;
when the vehicle-mounted charging device 100 is in a fast charging and boosting mode, the first switching device K1 is turned off, the second switching device K2 and the third switching device K3 are turned on, the first switching tube S1, the second switching tube S2 and the first inductor L1 form a first boosting circuit, and the third switching tube S3, the fourth switching tube S4 and the second inductor L2 form a second boosting circuit;
when the vehicle-mounted charging device 100 is in a first reverse charging mode, the first switching device K1 is turned off, the second switching device K2 and the third switching device K3 are turned on, the first switching tube S1, the second switching tube S2 and the first inductor L1 form a first voltage reduction circuit, and the third switching tube S3, the fourth switching tube S4 and the second inductor L2 form a second voltage reduction circuit.
When the vehicle-mounted charging device 100 works in the slow charging mode, the first switching device K1 is closed, the second switching device K2 and the third switching device K3 are disconnected, and S1-S4 work in the rectifying mode, so that the square wave voltage output by the isolation transformer circuit 23 is rectified into direct current, and the direct current is filtered by the C1 circuit to charge the power battery.
When the vehicle-mounted charging device 100 works in the fast charging and boosting mode, the first switching device K1 is disconnected, the second switching device K2 and the third switching device K3 are closed, the isolation transformation circuit 23 is disconnected from the power battery, S1, S2 and L1 form a first BOOST (BOOST) circuit, S3, S4 and L form a second BOOST circuit, and the first BOOST circuit and the second BOOST circuit are connected in parallel, namely two bridge arms are connected in parallel in a staggered mode. And S2 and S4 are switching tubes, S1 and S3 are follow current tubes, and the voltage output by the quick charging pile is boosted through the first BOOST circuit and the second BOOST circuit to charge the power battery. For example, at this time, the direct-current charging interface is connected with the quick-charging pile, the voltage of the quick-charging pile is 400V, the charging voltage of the power battery is 800V, and the voltage output by the quick-charging pile is boosted to 800V from 400V through the first BOOST circuit and the second BOOST circuit to charge the power battery.
When the vehicle-mounted charging device 100 works in a first reverse charging mode (the first reverse charging mode can be a voltage-reduced reverse charging mode), the first switching device K1 is disconnected, the second switching device K2 and the third switching device K3 are closed, the isolation transformation circuit 23 is disconnected from the power battery, S1, S2 and L2 form a first voltage-reduced (BUCK) circuit, and S3, S4 and L3 form a second BUCK circuit, namely, two bridge arms are connected in parallel in a staggered mode. And S1 and S3 are switching tubes, S2 and S4 are follow current tubes, and the voltage of the power battery is reduced through the first BUCK circuit and the second BUCK circuit, and then the other vehicle is charged (the fast charging port of the vehicle is connected with the fast charging port of the other vehicle). For example, the voltage of the power battery is 800V, at this time, the dc charging interface is connected to a fast charging interface of another vehicle, the charging voltage supported by the fast charging interface of another vehicle is 400V, and when the vehicle-mounted charging device 100 operates in the first reverse charging mode, the voltage output by the power battery is reduced from 800V to 400V through the first BUCK circuit and the second BUCK circuit, and then the voltage is output to the dc charging interface to charge another vehicle.
Referring to fig. 4, fig. 4 is a schematic structural diagram of another vehicle-mounted charging device according to an embodiment of the present disclosure. Fig. 4 is further obtained from fig. 3, and as shown in fig. 4, in addition to fig. 3, the vehicle-mounted charging device 100 further includes a second switch module K4, and the positive electrode of the dc charging interface is connected to the positive electrode of the power battery through the second switch module K4.
The second switch module K4 may be any one of a relay, an Insulated Gate Bipolar Transistor (IGBT), and a Metal-Oxide-Semiconductor (MOS) Transistor.
Optionally, when the second switch module K4 is turned on and the first switch module is turned off, the positive electrode of the dc charging interface charges the positive electrode of the power battery.
The first switch module is turned off, which means that all the switch devices included in the first switch module are turned off. For example, the first switch module includes a first switch device K1, a second switch device K2, and a third switch device K3, and the first switch module is turned off, which means that the first switch device K1, the second switch device K2, and the third switch device K3 are all turned off.
In this embodiment, the vehicle-mounted charging device 100 can work in a fast charging mode, and can directly charge the power battery through the fast charging pile connected with the direct-current charging interface. For example, at this time, the dc charging interface is connected to the fast charging pile, the voltage of the fast charging pile is 800V, the charging voltage of the power battery is 800V, at this time, the first switching device K1, the second switching device K2, and the third switching device K3 may all be turned off, the isolation transformer circuit 23 is disconnected from the power battery, the boosting element 222 is disconnected from the power battery, the second switching module K4 is closed, and the voltage output by the fast charging pile may be directly charged to the power battery.
Optionally, when the second switch module K4 is turned on and the first switch module is turned off, the positive electrode of the power battery charges the positive electrode of the dc charging interface.
The first switch module is turned off, which means that all the switch devices included in the first switch module are turned off. For example, the first switch module includes a first switch device K1, a second switch device K2, and a third switch device K3, and the first switch module is turned off, which means that the first switch device K1, the second switch device K2, and the third switch device K3 are all turned off.
In the embodiment of the present application, the vehicle-mounted charging device 100 may operate in the second reverse charging mode (the second reverse charging mode may be a direct reverse charging mode), and may directly charge the fast charging port of another vehicle connected to the dc charging port through the power battery. For example, at this time, the dc charging interface is connected to a fast charging interface of another vehicle, the charging voltage of the power battery is 800V, and the charging voltage supported by the fast charging interface of another vehicle is 800V, and when the vehicle-mounted charging device 100 operates in the second reverse charging mode, the voltage output by the power battery is output from 800V to the dc charging interface to charge another vehicle.
At this moment, can all turn off first switching device K1, second switching device K2 and third switching device K3, keep apart vary voltage circuit 23 and power battery disconnection, boost component 222 and power battery disconnection, close second switch module K4, can directly charge for power battery with the voltage that fills electric pile output soon.
When the vehicle-mounted charging device 100 works in the slow charging mode, the first switching device K1 is closed, the second switching device K2, the third switching device K3 and the second switching module K4 are disconnected, and S1-S4 work in the rectifying mode, rectify the square wave voltage output by the isolation transformer circuit 23 into direct current, and charge the power battery after being filtered by the C1.
When the vehicle-mounted charging device 100 works in the fast charging and boosting mode, the first switch device K1 and the second switch module K4 are disconnected, the second switch device K2 and the third switch device K3 are closed, the isolation transformation circuit 23 is disconnected from the power battery, the first BOOST (BOOST) circuit is formed by the first switch device K1, the second switch device K2 and the third switch device K3 (the first BOOST circuit multiplexes S1 and S2, so that the size of the vehicle-mounted charging device is reduced, and the cost is saved), the second BOOST (BOOST) circuit is formed by the second switch device S3, the second switch device S4 and the second switch device L2 (the second BOOST circuit multiplexes S3 and S4, so that the size of the vehicle-mounted charging device is reduced, and the cost is saved), and the first BOOST circuit and the second BOOST circuit are connected in parallel, that two bridge arms are connected in parallel in a staggered mode. And S2 and S4 are switching tubes, S1 and S3 are follow current tubes, and the voltage output by the quick charging pile is boosted through the first BOOST circuit and the second BOOST circuit to charge the power battery. For example, at this time, the direct-current charging interface is connected with the quick-charging pile, the voltage of the quick-charging pile is 400V, the charging voltage of the power battery is 800V, and the voltage output by the quick-charging pile is boosted to 800V from 400V through the first BOOST circuit and the second BOOST circuit to charge the power battery.
When the vehicle-mounted charging device 100 works in a first reverse charging mode (the first reverse charging mode can be a BUCK-boost reverse charging mode), the first switch device K1 and the second switch module K4 are disconnected, the second switch device K2 and the third switch device K3 are closed, the isolation transformation circuit 23 is disconnected from the power battery, the first BUCK (BUCK) circuit is formed by the S1, the S2 and the L2, the second BUCK (BUCK) circuit is formed by the S3, the S4 and the L3, and two bridge arms are connected in parallel in a staggered mode. And S1 and S3 are switching tubes, S2 and S4 are follow current tubes, and the voltage of the power battery is reduced through the first BUCK circuit and the second BUCK circuit, and then the other vehicle is charged (the fast charging port of the vehicle is connected with the fast charging port of the other vehicle). For example, the voltage of the power battery is 800V, at this time, the dc charging interface is connected to a fast charging port of another vehicle, the charging voltage supported by the fast charging port of another vehicle is 400V, and when the vehicle-mounted charging device 100 operates in the first reverse charging mode, the voltage output by the power battery is reduced from 800V to 400V by the first BUCK circuit and the second BUCK circuit, and then the reduced voltage is output to the dc charging interface to charge another vehicle.
Referring to fig. 5, fig. 5 is a schematic structural diagram of another vehicle-mounted charging device according to an embodiment of the present disclosure. Fig. 5 is further derived from fig. 4, and as shown in fig. 5, on the basis of fig. 4, the ac-to-dc conversion module 10 in the vehicle-mounted charging device 100 may include a fifth switching tube S5, a sixth switching tube S6, a seventh switching tube S7, an eighth switching tube S8 and a second capacitor C2; the first power conversion circuit 21 may include a ninth switching tube S9, a tenth switching tube S10, an eleventh switching tube S11, a twelfth switching tube S12, and a third capacitor C3; the isolation transformer circuit may include a third inductor L3 and an isolation transformer T1. Specific connection relationships of the components can be seen in fig. 5, and details are not described here.
In one possible embodiment, the boosting element 222 in fig. 5 may include only L1, and the first switching module may include only the first switching device K1 and the second switching device K2.
In one possible embodiment, the boosting element 222 in fig. 5 may include only L2, and the first switching module may include only the first switching device K1 and the third switching device K3.
In one possible embodiment, an inductor may be connected to the hot wire of the ac charging interface, which may be used to improve electromagnetic compatibility and prevent interference of high frequency current to the vehicle-mounted charging device.
The positive pole of the direct current charging interface can be connected with an inductor, the positive pole of the power battery can be connected with an inductor, and the negative pole of the power battery can be connected with an inductor, so that alternating current can be isolated, and the electromagnetic compatibility is improved.
The embodiment of the application can also provide an electric automobile which can comprise the vehicle-mounted charging device shown in any one of the figures 1 to 5.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed vehicle charging device may be implemented in other manners. For example, the above-described embodiments of the vehicle charging apparatus are merely illustrative, and for example, the division of the units is only one logical function division, and other division manners may be available in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted or not executed.
Claims (10)
1. A vehicle-mounted charging device is characterized by comprising an AC-to-DC conversion module and a DC conversion module, wherein the DC conversion module comprises a first power conversion circuit, a multiplexing circuit and an isolation transformation circuit, the multiplexing circuit comprises a first switch module, a second power conversion circuit and a boosting element, and the first switch module comprises a first switch device and a second switch device;
the first input end of the AC-DC conversion module is connected with a live wire of an AC charging interface, the second input end of the AC-DC conversion module is connected with a zero wire of the AC charging interface, the first output end of the AC-DC conversion module is connected with the first input end of the first power conversion circuit, the second output end of the AC-DC conversion module is connected with the second input end of the first power conversion circuit, the first output end of the first power conversion circuit is connected with the first output end of the isolation transformation circuit, the second output end of the first power conversion circuit is connected with the second input end of the isolation transformation circuit, the first output end of the isolation transformation circuit is communicated with the first input end of the second power conversion circuit through a first switch device, the second output end of the isolation transformation circuit is communicated with the second input end of the second power conversion circuit, the first output end of the second power conversion circuit is connected with the positive electrode of a power battery, and the second output end of the second power conversion circuit is connected with the negative electrode of the power battery; the first end of the boosting element is connected with the anode of the direct-current charging interface, and the second end of the boosting element is connected with the first input end of the second power conversion circuit through the second switching device; and the negative electrode of the direct current charging interface is connected with the negative electrode of the power battery.
2. The vehicle-mounted charging apparatus according to claim 1,
the first power conversion circuit is used for converting an input first direct current voltage into a first alternating current voltage, wherein the first direct current voltage is a direct current voltage output by a first output end of the alternating current-to-direct current module;
the isolation transformation circuit is used for converting the first alternating voltage into a second alternating voltage;
the multiplexing circuit is configured to convert the second ac voltage into a second dc voltage when the first switching device is turned on and the second switching device is turned off, where the second dc voltage is output to the positive electrode of the power battery.
3. The vehicle-mounted charging device according to claim 2,
the multiplexing circuit is further configured to convert a third direct current voltage into a fourth direct current voltage when the first switch device is turned off and the second switch device is turned on, where the fourth direct current voltage is used for being output to the anode of the power battery, the fourth direct current voltage is greater than the second direct current voltage, the third direct current voltage is smaller than the fourth direct current voltage, and the third direct current voltage is a direct current voltage output by the anode of the direct current charging interface.
4. The vehicle-mounted charging device according to claim 2,
the multiplexing circuit is further configured to convert the positive voltage of the power battery into a fifth direct-current voltage under the condition that the first switch device is turned off and the second switch device is turned on, where the fifth direct-current voltage is output to the direct-current charging interface and is smaller than the positive voltage of the power battery.
5. The vehicle-mounted charging apparatus according to any one of claims 1 to 4, wherein the first switching module further includes a third switching device; and the third end of the boosting element is connected with the second input end of the second power conversion circuit through the third switching device.
6. The vehicle-mounted charging device according to claim 5, wherein the second power conversion circuit comprises a first switching tube, a second switching tube, a third switching tube, a fourth switching tube and a first capacitor; the boosting element comprises a first inductor and a second inductor;
the first end of the first switch device is connected with the first output end of the isolation transformer circuit, the second end of the first switch device is connected with the first end of the first switch tube, the first end of the second switch tube and the first end of the second switch device, the second end of the second switch device is connected with the first end of the first inductor, the second end of the first inductor is connected with the positive electrode of the direct-current charging interface and the first end of the second inductor, the second end of the second inductor is connected with the first end of the third switch device, the second end of the third switch device is connected with the second output end of the isolation transformer circuit, the first end of the third switch tube and the first end of the fourth switch tube, the second end of the first switch tube is connected with the second end of the third switch tube, the first end of the first capacitor and the positive electrode of the power battery, and the second end of the second switch tube is connected with the second end of the fourth switch tube, the second end of the first capacitor and the negative electrode of the power battery.
7. The vehicle-mounted charging device according to claim 6,
when the vehicle-mounted charging device is in a slow charging mode, the first switching element is switched on, the second switching element and the third switching element are switched off, and the first switching tube, the second switching tube, the third switching tube and the fourth switching tube are in a rectification mode;
when the vehicle-mounted charging device is in a fast charging and boosting mode, the first switching element is turned off, the second switching element and the third switching element are turned on, the first switching tube, the second switching tube and the first inductor form a first boosting circuit, and the third switching tube, the fourth switching tube and the second inductor form a second boosting circuit;
when the vehicle-mounted charging device is in a first reverse charging mode, the first switch device is turned off, the second switch device and the third switch device are turned on, the first switch tube, the second switch tube and the first inductor form a first voltage reduction circuit, and the third switch tube, the fourth switch tube and the second inductor form a second voltage reduction circuit.
8. The vehicle-mounted charging device according to claim 1, further comprising a second switch module, wherein the positive electrode of the direct current charging interface is connected with the positive electrode of the power battery through the second switch module.
9. The vehicle-mounted charging device according to claim 8, wherein when the second switching module is turned on and the first switching module is turned off, a positive electrode of the dc charging interface charges a positive electrode of the power battery.
10. An electric vehicle comprising the vehicle-mounted charging device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222928607.9U CN218805270U (en) | 2022-11-02 | 2022-11-02 | Vehicle-mounted charging device and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222928607.9U CN218805270U (en) | 2022-11-02 | 2022-11-02 | Vehicle-mounted charging device and electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218805270U true CN218805270U (en) | 2023-04-07 |
Family
ID=87264458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222928607.9U Active CN218805270U (en) | 2022-11-02 | 2022-11-02 | Vehicle-mounted charging device and electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218805270U (en) |
-
2022
- 2022-11-02 CN CN202222928607.9U patent/CN218805270U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106564392B (en) | Automobile wireless charging system and automobile wireless charging unit | |
| EP3018812B1 (en) | Bidirectional dc/dc converter, and bidirectional power converter | |
| US20200099311A1 (en) | Bridgeless single-stage ac/dc converter | |
| US9425641B2 (en) | Battery charging apparatus | |
| CN109874385B (en) | Power conversion system | |
| US11349386B2 (en) | Apparatus and method for charging battery of vehicle | |
| CN110774909A (en) | OBC circuit, OBC charger, new energy automobile and fill electric pile | |
| CN105981278A (en) | In-vehicle charger and surge-suppression method for in-vehicle charger | |
| CN203774850U (en) | Multifunctional integrated electric vehicle-mounted charger with mode switch function | |
| CN114301298B (en) | Energy conversion system, energy conversion method and power system | |
| KR20160122441A (en) | Charging device of vehicle | |
| CN110235336B (en) | Integrated vehicle-mounted charger circuit, manufacturing method thereof and integrated vehicle-mounted charger | |
| CN218805270U (en) | Vehicle-mounted charging device and electric automobile | |
| CN214689074U (en) | Vehicle-mounted charging equipment and vehicle | |
| CN112572189B (en) | Vehicle-mounted charging and discharging system and vehicle with same | |
| CN107612352A (en) | One kind is segmented efficient phase shift power supply | |
| CN113346755A (en) | Vehicle-mounted isolated bidirectional DCDC converter | |
| CN202406057U (en) | Three-phase alternating current and direct-current bidirectional transducer | |
| CN219351306U (en) | Vehicle-mounted power supply circuit and vehicle | |
| CN112583094A (en) | Vehicle-mounted charging system and vehicle with same | |
| CN112583061A (en) | Vehicle-mounted charging system and vehicle with same | |
| CN220359039U (en) | Magnetic integrated circuit and electric automobile | |
| CN210617830U (en) | Integrated electric drive device and electric vehicle comprising same | |
| CN112583093B (en) | Vehicle-mounted charging system and vehicle with same | |
| CN215436029U (en) | Vehicle charging device and vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |