CN112693340B - Function integrated vehicle-mounted charger and working method thereof - Google Patents
Function integrated vehicle-mounted charger and working method thereof Download PDFInfo
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- CN112693340B CN112693340B CN202011383571.XA CN202011383571A CN112693340B CN 112693340 B CN112693340 B CN 112693340B CN 202011383571 A CN202011383571 A CN 202011383571A CN 112693340 B CN112693340 B CN 112693340B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
The invention discloses a function integrated vehicle-mounted charger and a working method thereof, wherein the function integrated vehicle-mounted charger comprises an alternating current-direct current switching circuit, an EMI filter circuit, a rectifier bridge switching circuit, a Boost circuit, a full-bridge LLC high-voltage direct current conversion circuit and a half-bridge LLC low-voltage direct current conversion circuit which are sequentially connected, the full-bridge LLC high-voltage direct-current conversion circuit is respectively connected with the alternating-current and direct-current switching circuit and the Boost voltage-boosting circuit, the half-bridge LLC low-voltage direct-current conversion circuit is connected with the Boost voltage-boosting circuit, the power battery E1 is connected with the full-bridge LLC high-voltage direct-current conversion circuit, and the low-voltage end E2 is connected with the half-bridge LLC low-voltage direct-current conversion circuit; the invention has the advantages that: the power conversion control of multiple working modes is realized, the integration level is high, and the volume and the cost are relatively low.
Description
Technical Field
The invention relates to the field of electric automobiles, in particular to a function integrated vehicle-mounted charger and a working method thereof.
Background
In recent years, new energy automobiles have become an important development direction of the future automobile industry, and through years of development, vehicle-mounted power supply equipment has a development trend of miniaturization, integration and high power. The vehicle-mounted power supply comprises a vehicle-mounted charger and a vehicle-mounted DC converter, as shown in a vehicle-mounted power supply control schematic diagram in FIG. 1, when the electric automobile is in an alternating current charging mode, an alternating current source and a direct current source switching circuit are switched into an alternating current input mode, alternating current is converted into direct current and is transmitted to a high-voltage direct current conversion circuit, and at the moment, a Boost conversion circuit plays a role of a power factor correction circuit, namely, the Boost conversion circuit plays a role of the power factor correction circuit, so that alternating current-direct current conversion is realized; and when the electric automobile is in a driving mode, the alternating current source and direct current source switching circuit is switched into a direct current input mode, the obtained direct current is subjected to direct current conversion and then is provided for a low-voltage system, and the Boost conversion circuit plays a role of a DC-DC conversion circuit. When the electric automobile is in a driving mode, the low-voltage system is powered by the power battery pack.
The vehicle-mounted charger and the vehicle-mounted DC converter are used as electric energy conversion core components of the electric automobile, at present, a vehicle-mounted power supply is mainly operated in a discrete module or physical integration mode, the volume is large, the cost is high, the functions of the vehicle-mounted charger and the vehicle-mounted DC converter are integrated, the cost and the volume are reduced, and the reliability of the system is improved and is important for the development of new energy electric automobiles in the future.
The Chinese patent application No. CN201811509577.X discloses an EV vehicle-mounted charger based on a SiC power device, which comprises a main circuit and a control circuit, wherein the main circuit comprises a rectifying and filtering module and an LLC resonant DC-DC circuit; the rectification filter module adopts a totem pole bridgeless power factor correction circuit structure and is directly connected with a three-phase alternating current input power supply; the LLC resonant DC-DC circuit consists of a first half-bridge LLC converter and a second half-bridge LLC converter which have the same topological structure, and the first half-bridge LLC converter and the second half-bridge LLC converter are connected in parallel and then connected in series between the rectifying and filtering module and the output side; the first half-bridge LLC converter and the second half-bridge LLC converter respectively comprise a half-bridge inversion module, a high-frequency transformation module and a passive rectifying and filtering module; the rectification filter module and the LLC resonant DC-DC circuit are respectively connected with a control circuit, and the control circuit adopts an average current control mode and a PFM control mode to realize the output of the digital control circuit. The power supply has the advantages of high power output precision, high power density, high reliability and small occupied space. But it does not enable power conversion control for multiple modes of operation and is low in integration and relatively high in volume and cost.
Disclosure of Invention
The invention aims to solve the technical problems that the existing vehicle-mounted charger cannot realize power conversion control of various working modes, and has low integration level, relatively high volume and relatively high cost.
The invention solves the technical problems by the following technical means: the function integrated vehicle-mounted charger comprises an alternating current-direct current switching circuit, an EMI filter circuit, a rectifier bridge switching circuit, a Boost voltage-boosting circuit, a full-bridge LLC high-voltage direct current conversion circuit and a half-bridge LLC low-voltage direct current conversion circuit, wherein the alternating current-direct current switching circuit, the EMI filter circuit, the rectifier bridge switching circuit and the Boost voltage-boosting circuit are sequentially connected, the full-bridge LLC high-voltage direct current conversion circuit is respectively connected with the alternating current-direct current switching circuit and the Boost voltage-boosting circuit, the half-bridge LLC low-voltage direct current conversion circuit is connected with the Boost voltage-boosting circuit, a power battery E1 is connected with the full-bridge LLC high-voltage direct current conversion circuit, and a low-voltage end E2 is connected with the half-bridge LLC low-voltage direct current conversion circuit;
when the electric automobile is in an alternating current charging mode, the power grid supplies power to the power battery E1 and the low-voltage end E2, the Boost circuit plays a role of a power factor correction circuit, and alternating current-direct current conversion is realized; when the electric automobile is in a driving mode, the power battery E1 is used for supplying power to the low-voltage end E2, and the Boost converting circuit plays a role of a DC-DC converting circuit to realize direct-current Boost.
According to the electric topological structure characteristics of the vehicle-mounted charger and the vehicle-mounted direct current converter, the front-stage Boost circuit of the vehicle-mounted power supply is multiplexed to realize the functions of the active power factor correction circuit and the DC-DC conversion circuit, the front-stage circuit of the Boost circuit is multiplexed, the full-bridge LLC high-voltage direct current conversion circuit and the half-bridge LLC low-voltage direct current conversion circuit of the rear stage are also multiplexed to the Boost circuit, and the power conversion control functions of two working modes are realized under the condition of multiplexing devices.
Further, the AC/DC switching circuit comprises a switch S1-1, a switch S1-2, a switch S2-1 and a switch S2-2, wherein one end of the switch S1-1 is connected with one end of an AC source VS, one end of the switch S1-2 is connected with the other end of the AC source VS, one end of the switch S2-1 and one end of the switch S2-2 are both connected with the full-bridge LLC high-voltage DC conversion circuit, one contact A is shared by the other end of the switch S1-1 and the other end of the switch S2-1, and one contact B is shared by the other end of the switch S1-2 and the other end of the switch S2-2.
Further, the EMI filter circuit includes a capacitor X1, a capacitor X2, and an inductor T3, where the inductor T3 includes a primary winding T31 and a secondary winding T32, one end of the capacitor X1 is connected to one end of the contact a and one end of the primary winding T31, and the other end of the capacitor X1 is connected to one end of the contact B and one end of the secondary winding T32; one end of the capacitor X2 is connected with the rectifier bridge switching circuit and the other end of the primary winding T31 respectively, and the other end of the capacitor X2 is connected with the rectifier bridge switching circuit and the other end of the secondary winding T32 respectively.
Still further, the rectifier bridge switching circuit comprises a switch S3-1, a switch S3-2 and a rectifier bridge cone Br, one AC input end of the rectifier bridge cone Br is used as a first contact of the switch S3-1, the output positive end of the rectifier bridge cone Br is used as a second contact of the switch S3-1, the other AC input end of the rectifier bridge cone Br is used as a first contact of the switch S3-2, the output negative end of the rectifier bridge cone Br is used as a second contact of the switch S3-2, one end of a capacitor X2 is connected with a third contact of the switch S3-1, and the other end of the capacitor X2 is connected with the third contact of the switch S3-2.
Furthermore, the Boost circuit comprises an inductor L1, an inductor L2, a MOS transistor Q1, a MOS transistor Q2, a capacitor C1, a diode D1 and a diode D2, wherein one end of the inductor L1 and one end of the inductor L2 are connected with the output positive end of the rectifier bridge cone Br, one end of the capacitor C1, the drain electrode of the MOS transistor Q1 and the drain electrode of the MOS transistor Q2 are connected with the output negative end of the rectifier bridge cone Br, the other end of the inductor L1 is connected with the positive electrode of the diode D1 and the source electrode of the MOS transistor Q2, and the other end of the inductor L2 is connected with the positive electrode of the diode D2 and the source electrode of the MOS transistor Q1; the other end of the capacitor C1 is connected to the negative electrode of the diode D1 and the negative electrode of the diode D2, respectively.
Still further, the full-bridge LLC high-voltage direct-current conversion circuit includes a MOS transistor Q3, a MOS transistor Q4, a MOS transistor Q5, a MOS transistor Q6, a resonant inductor Lr1, a resonant capacitor Cr1, a converter T1, a capacitor C2, a diode D3, and a diode D4, the converter T1 includes a primary winding T11, a secondary winding T12, and a secondary winding T13, the source of the MOS transistor Q3 and the source of the MOS transistor Q5 are both connected to the negative electrode of the diode D1, the drain of the MOS transistor Q4 and the drain of the MOS transistor Q6 are both connected to one end of the capacitor C1, the drain of the MOS transistor Q3, the source of the MOS transistor Q4, and one end of the resonant inductor Lr1 are connected, the drain of the MOS transistor Q6, the other end of the resonant inductor Lr1, one end of the resonant capacitor Cr1, and one end of the primary winding T11 are connected to the other end of the resonant capacitor Cr1 and the other end of the primary winding T11; the same name end of the secondary winding T12 is connected with the positive electrode of the diode D3, the different name end of the secondary winding T12 is connected with the same name end of the secondary winding T13, the different name end of the secondary winding T13 is connected with the positive electrode of the diode D4, one end of the capacitor C2 is respectively connected with the negative electrode of the diode D3, one end of the switch S2-1 and the negative electrode of the diode D4, the other end of the capacitor C2 is respectively connected with the different name end of the secondary winding T12 and one end of the switch S2-2, one end of the capacitor C2 is connected with the positive electrode of the power battery E1, and the other end of the capacitor C2 is connected with the negative electrode of the power battery E1.
Further, the half-bridge LLC low-voltage dc conversion circuit includes a capacitor C3, a capacitor C4, a MOS transistor Q7, a MOS transistor Q8, a resonant inductor Lr2, a resonant capacitor Cr3, a transformer T2, a MOS transistor Q9, and a MOS transistor Q10, where the transformer T2 includes a primary coil T21, a secondary coil T22, and a secondary coil T23, one end of the capacitor C3 is connected to the negative electrode of the diode D1, the source of the MOS transistor Q7, and one end of the resonant capacitor Cr2, the other end of the capacitor C3 is connected to one end of the capacitor C1, the drain of the MOS transistor Q8, and one end of the resonant capacitor Cr3, the drain of the MOS transistor Q7, the source of the MOS transistor Q8, one end of the resonant inductor Lr2, the other end of the capacitor Cr3, and one end of the primary coil T21, and the other end of the resonant inductor Lr2 are connected to the other end of the primary coil T21; the same name end of the secondary coil T22 is connected with the source electrode of the MOS tube Q9, the different name end of the secondary coil T22 is connected with the same name end of the secondary coil T23, the different name end of the secondary coil T23 is connected with the source electrode of the MOS tube Q10, one end of the capacitor C4 is connected with the drain electrode of the MOS tube Q9 and the drain electrode of the MOS tube Q10, and the other end of the capacitor C4 is connected with the different name end of the secondary coil T22; one end of the capacitor C4 is connected with the positive electrode of the low-voltage end E2, and the other end of the capacitor C4 is connected with the negative electrode of the low-voltage end E2.
The invention also provides a working method of the function integrated vehicle-mounted charger, when the power grid is adopted to supply power to the power battery E1 and the low-voltage end E2, when the electric automobile is in an alternating current charging mode, the alternating current-direct current switching circuit is switched into an alternating current input mode, alternating current is converted into direct current through the alternating current-direct current switching circuit, the direct current is transmitted to the full-bridge LLC high-voltage direct current conversion circuit through the EMI filter circuit, the rectifier bridge switching circuit and the Boost circuit, the Boost circuit plays a role of the power factor correction circuit at the moment, alternating current-direct current conversion is realized, the rear-stage full-bridge LLC high-voltage direct current conversion circuit converts the direct current into a variable direct current power supply to charge the power battery E1, and the half-bridge LLC low-voltage direct current conversion circuit converts the high-voltage direct current into the low-voltage direct current to supply the low-voltage end E2 after synchronous rectification.
Further, when the power battery E1 is used for supplying power to the low-voltage end E2, when the electric automobile is in a driving mode, the ac/DC switching circuit is switched to a DC input mode, the DC obtained from the power battery E1 is subjected to DC conversion by the EMI filter circuit, the rectifier bridge switching circuit and the Boost circuit and then is supplied to the half-bridge LLC low-voltage DC conversion circuit, at this time, the Boost conversion circuit plays a role of the DC-DC conversion circuit, the half-bridge LLC low-voltage DC conversion circuit converts high-voltage DC into low-voltage DC, and supplies power to the low-voltage end E2 after synchronous rectification, and at this time, the half-bridge LLC low-voltage DC conversion circuit is supplied with power by the power battery E1.
Further, when the power grid is adopted to charge the power battery E1 or the low-voltage end E2 independently, when the electric automobile is in an alternating current charging mode, the alternating current-direct current switching circuit is switched to an alternating current input mode, and only the full-bridge LLC high-voltage direct current conversion circuit is started, the half-bridge LLC low-voltage direct current conversion circuit is not started, so that the power battery E1 is charged independently;
or when the electric automobile is in the alternating current charging mode, the alternating current-direct current switching circuit is switched into the alternating current input mode, and the low-voltage end E2 is charged independently by only starting the half-bridge LLC low-voltage direct current conversion circuit and not starting the full-bridge LLC high-voltage direct current conversion circuit.
The invention has the advantages that:
(1) According to the electric topological structure characteristics of the vehicle-mounted charger and the vehicle-mounted direct current converter, the front-stage Boost circuit of the vehicle-mounted power supply is multiplexed to realize the functions of the active power factor correction circuit and the DC-DC conversion circuit, the front-stage circuit of the Boost circuit is multiplexed, the full-bridge LLC high-voltage direct current conversion circuit and the half-bridge LLC low-voltage direct current conversion circuit of the rear stage are also multiplexed to the Boost circuit, and the power conversion control functions of two working modes are realized under the condition of multiplexing devices.
(2) The existing vehicle-mounted charger and the vehicle-mounted direct current converter are integrated in electrical function, original electrical functions of the vehicle-mounted charger and the vehicle-mounted direct current converter are achieved, and the function of simultaneously supplying power to the low-voltage end E2 when the power battery E1 is charged is additionally added.
Drawings
FIG. 1 is a schematic diagram of a prior art vehicle power control;
fig. 2 is a schematic block diagram of a function-integrated vehicle-mounted charger according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a function integrated vehicle-mounted charger according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a function-integrated vehicle-mounted charger according to an embodiment of the present invention when a power grid is used to supply power to a power battery E1 and a low-voltage end E2;
fig. 5 is a schematic circuit diagram of a function-integrated vehicle-mounted charger according to an embodiment of the present invention when a power battery E1 is used to supply power to a low-voltage end E2;
fig. 6 is a schematic circuit diagram of a function-integrated vehicle-mounted charger according to an embodiment of the present invention when a power grid is used to charge a power battery E1 or a low-voltage terminal E2 separately.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 2, the function integrated vehicle-mounted charger comprises an ac/dc switching circuit 1, an EMI filter circuit 2, a rectifier bridge switching circuit 3, a Boost circuit 4, a full-bridge LLC high-voltage direct-current conversion circuit 5, and a half-bridge LLC low-voltage direct-current conversion circuit 6, wherein the ac/dc switching circuit 1, the EMI filter circuit 2, the rectifier bridge switching circuit 3, and the Boost circuit 4 are sequentially connected, the full-bridge LLC high-voltage direct-current conversion circuit 5 is respectively connected with the ac/dc switching circuit 1 and the Boost circuit 4, the half-bridge LLC low-voltage direct-current conversion circuit 6 is connected with the Boost circuit 4, the power battery E1 is connected with the full-bridge LLC high-voltage direct-current conversion circuit 5, and the low-voltage end E2 is connected with the half-bridge LLC low-voltage direct-current conversion circuit 6; the low voltage end E2 is a low voltage storage battery and a low voltage load.
When the electric automobile is in an alternating current charging mode, the power grid supplies power to the power battery E1 and the low-voltage end E2, the Boost circuit 4 plays a role of a power factor correction circuit, and alternating current-direct current conversion is realized; when the electric automobile is in a driving mode, the power battery E1 is used for supplying power to the low-voltage end E2, and the Boost converting circuit plays a role of a DC-DC converting circuit to realize direct-current Boost.
The specific structure of each circuit will be described in detail below, as shown in fig. 3, the ac/dc switching circuit 1 includes a switch S1-1, a switch S1-2, a switch S2-1, and a switch S2-2, one end of the switch S1-1 is connected to one end of the ac source VS, one end of the switch S1-2 is connected to the other end of the ac source VS, one end of the switch S2-1 and one end of the switch S2-2 are both connected to the full bridge LLC dc-dc converter circuit 5, the other end of the switch S1-1 and the other end of the switch S2-1 share a contact a, and the other end of the switch S1-2 and the other end of the switch S2-2 share a contact B.
With continued reference to fig. 3, the EMI filter circuit 2 includes a capacitor X1, a capacitor X2, and an inductor T3, where the inductor T3 includes a primary winding T31 and a secondary winding T32, one end of the capacitor X1 is connected to one end of the contact a and one end of the primary winding T31, and the other end of the capacitor X1 is connected to one end of the contact B and one end of the secondary winding T32; one end of the capacitor X2 is connected to the rectifier bridge switching circuit 3 and the other end of the primary winding T31, respectively, and the other end of the capacitor X2 is connected to the rectifier bridge switching circuit 3 and the other end of the secondary winding T32, respectively.
With continued reference to fig. 3, the rectifier bridge switching circuit 3 includes a switch S3-1, a switch S3-2, and a rectifier bridge cone Br, wherein one ac input end of the rectifier bridge cone Br is used as a first contact of the switch S3-1, an output positive end of the rectifier bridge cone Br is used as a second contact of the switch S3-1, another ac input end of the rectifier bridge cone Br is used as a first contact of the switch S3-2, an output negative end of the rectifier bridge cone Br is used as a second contact of the switch S3-2, one end of the capacitor X2 is connected with a third contact of the switch S3-1, and the other end of the capacitor X2 is connected with the third contact of the switch S3-2.
With continued reference to fig. 3, the Boost circuit 4 includes an inductor L1, an inductor L2, a MOS transistor Q1, a MOS transistor Q2, a capacitor C1, a diode D1, and a diode D2, where one end of the inductor L1 and one end of the inductor L2 are connected to the output positive end of the rectifier bridge Br, one end of the capacitor C1, the drain of the MOS transistor Q1, and the drain of the MOS transistor Q2 are connected to the output negative end of the rectifier bridge Br, the other end of the inductor L1 is connected to the positive electrode of the diode D1 and the source of the MOS transistor Q2, and the other end of the inductor L2 is connected to the positive electrode of the diode D2 and the source of the MOS transistor Q1; the other end of the capacitor C1 is connected to the negative electrode of the diode D1 and the negative electrode of the diode D2, respectively.
With continued reference to fig. 3, the full-bridge LLC high-voltage dc conversion circuit 5 includes a MOS transistor Q3, a MOS transistor Q4, a MOS transistor Q5, a MOS transistor Q6, a resonant inductor Lr1, a resonant capacitor Cr1, a converter T1, a capacitor C2, a diode D3, and a diode D4, where the converter T1 includes a primary winding T11, a secondary winding T12, and a secondary winding T13, the source of the MOS transistor Q3 and the source of the MOS transistor Q5 are both connected to the negative electrode of the diode D1, the drain of the MOS transistor Q4 and the drain of the MOS transistor Q6 are both connected to one end of the capacitor C1, the drain of the MOS transistor Q3, the source of the MOS transistor Q4, and one end of the resonant inductor Lr1, one end of the resonant capacitor Cr1, and one end of the primary winding T11, and the other end of the resonant capacitor Cr1 is connected to the other end of the primary winding T11; the same name end of the secondary winding T12 is connected with the positive electrode of the diode D3, the different name end of the secondary winding T12 is connected with the same name end of the secondary winding T13, the different name end of the secondary winding T13 is connected with the positive electrode of the diode D4, one end of the capacitor C2 is respectively connected with the negative electrode of the diode D3, one end of the switch S2-1 and the negative electrode of the diode D4, the other end of the capacitor C2 is respectively connected with the different name end of the secondary winding T12 and one end of the switch S2-2, one end of the capacitor C2 is connected with the positive electrode of the power battery E1, and the other end of the capacitor C2 is connected with the negative electrode of the power battery E1.
With continued reference to fig. 3, the half-bridge LLC low-voltage dc conversion circuit 6 includes a capacitor C3, a capacitor C4, a MOS transistor Q7, a MOS transistor Q8, a resonant inductor Lr2, a resonant capacitor Cr3, a transformer T2, a MOS transistor Q9, and a MOS transistor Q10, where the transformer T2 includes a primary coil T21, a secondary coil T22, and a secondary coil T23, one end of the capacitor C3 is connected to the negative electrode of the diode D1, the source electrode of the MOS transistor Q7, and one end of the resonant capacitor Cr2, the other end of the capacitor C3 is connected to one end of the capacitor C1, the drain electrode of the MOS transistor Q8, and one end of the resonant capacitor Cr3, the drain electrode of the MOS transistor Q7, the source electrode of the resonant inductor Lr2, the other end of the capacitor Cr3, and one end of the primary coil T21, and the other end of the resonant inductor Lr2 are connected to the other end of the primary coil T21; the same name end of the secondary coil T22 is connected with the source electrode of the MOS tube Q9, the different name end of the secondary coil T22 is connected with the same name end of the secondary coil T23, the different name end of the secondary coil T23 is connected with the source electrode of the MOS tube Q10, one end of the capacitor C4 is connected with the drain electrode of the MOS tube Q9 and the drain electrode of the MOS tube Q10, and the other end of the capacitor C4 is connected with the different name end of the secondary coil T22; one end of the capacitor C4 is connected with the positive electrode of the low-voltage end E2, and the other end of the capacitor C4 is connected with the negative electrode of the low-voltage end E2.
As shown in fig. 4, the invention further provides a working method of the function integrated vehicle-mounted charger, when the power grid is adopted to supply power to the power battery E1 and the low-voltage end E2, when the electric automobile is in an alternating current charging mode, one end of the switch S2-1 is not contacted with the contact a, one end of the switch S1-1 is conducted with the contact a, one end of the switch S1-2 is conducted with the contact B, one end of the switch S2-2 is not contacted with the contact B, the third contact of the switch S3-1 is communicated with one alternating current input end of the rectifier bridge cone Br, at this time, the alternating current-direct current switching circuit 1 is switched into an alternating current input mode, the alternating current is converted into direct current by the alternating current-direct current switching circuit 1, and is transmitted to the full-bridge LLC high-voltage direct current conversion circuit 5 by the LLC filter circuit 2, the rectifier bridge switching circuit 3 and the Boost circuit 4, at this time, the Boost circuit 4 plays a role of a power factor correction circuit, the alternating current-direct current conversion is realized, the first contact of the switch S3-2 is communicated with the other alternating current input end of the rectifier bridge cone Br, at this time, the alternating current-direct current switching circuit 1 is switched into direct current power by the alternating current voltage output end of the full-direct current voltage bridge 6, and the direct current voltage conversion circuit 6 is converted into direct current power voltage power source 6, and the direct current voltage power source is converted into low voltage power source.
As shown in fig. 5, when the power battery E1 is used to supply power to the low voltage end E2, when the electric automobile is in a driving mode, one end of the switch S2-1 is conducted with the contact a, one end of the switch S1-1 is not contacted with the contact a, one end of the switch S1-2 is not contacted with the contact B, one end of the switch S2-2 is conducted with the contact B, the third contact of the switch S3-1 is connected with the positive end of the output of the rectifier bridge cone Br, the first contact of the switch S3-2 is connected with the negative end of the output of the rectifier bridge cone Br, at this time, the ac/DC switching circuit 1 is switched to a DC input mode, and DC power obtained from the power battery E1 is supplied to the half-bridge LLC low voltage DC conversion circuit 6 after DC conversion by the EMI filter circuit 2, the rectifier bridge switching circuit 3 and the Boost circuit 4, at this time, the half-bridge LLC low voltage DC conversion circuit 6 converts high voltage DC power to low voltage DC power to power supply the low voltage end E2 after synchronous rectification.
As shown in fig. 6, when the power battery E1 or the low-voltage end E2 is charged independently by using the power grid, when the electric automobile is in the ac charging mode, one end of the switch S2-1 is conducted with the contact a, one end of the switch S1-1 is not contacted with the contact a, one end of the switch S1-2 is not contacted with the contact B, one end of the switch S2-2 is conducted with the contact B, the third contact of the switch S3-1 is connected with the output positive end of the rectifier bridge cone Br, the first contact of the switch S3-2 is connected with the output negative end of the rectifier bridge cone Br, at this time, the ac/dc switching circuit 1 is switched to the ac input mode, and the power battery E1 is charged independently by only enabling the full bridge LLC high-voltage dc conversion circuit 5 and not enabling the half bridge LLC low-voltage dc conversion circuit 6;
or when the electric automobile is in the alternating current charging mode, the alternating current-direct current switching circuit 1 is switched into the alternating current input mode, and the full-bridge LLC high-voltage direct current conversion circuit 5 is not started by starting only the half-bridge LLC low-voltage direct current conversion circuit 6, so that the low-voltage end E2 is charged independently.
According to the technical scheme, the function integrated vehicle-mounted charger and the working method thereof provided by the invention have the advantages that according to the electric topological structure characteristics of the vehicle-mounted charger and the vehicle-mounted direct current converter, the front-stage Boost circuit 4 of the vehicle-mounted power supply is multiplexed to realize the functions of an active power factor correction circuit and a DC-DC conversion circuit, the front-stage circuit of the Boost circuit 4 is multiplexed, the rear-stage full-bridge LLC high-voltage direct current conversion circuit 5 and the half-bridge LLC low-voltage direct current conversion circuit 6 are multiplexed to also multiplex the Boost circuit 4, and the power conversion control functions of two working modes are realized under the condition that devices are multiplexed.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. The function integrated vehicle-mounted charger is characterized by comprising an alternating current-direct current switching circuit, an EMI filter circuit, a rectifier bridge switching circuit, a Boost voltage-boosting circuit, a full-bridge LLC high-voltage direct current conversion circuit and a half-bridge LLC low-voltage direct current conversion circuit, wherein the alternating current-direct current switching circuit, the EMI filter circuit, the rectifier bridge switching circuit and the Boost voltage-boosting circuit are sequentially connected, the full-bridge LLC high-voltage direct current conversion circuit is respectively connected with the alternating current-direct current switching circuit and the Boost voltage-boosting circuit, the half-bridge LLC low-voltage direct current conversion circuit is connected with the Boost voltage-boosting circuit, a power battery E1 is connected with the full-bridge LLC high-voltage direct current conversion circuit, and a low-voltage end E2 is connected with the half-bridge LLC low-voltage direct current conversion circuit;
the alternating current-direct current switching circuit comprises a switch S1-1, a switch S1-2, a switch S2-1 and a switch S2-2, wherein one end of the switch S1-1 is connected with one end of an alternating current source VS, one end of the switch S1-2 is connected with the other end of the alternating current source VS, one end of the switch S2-1 and one end of the switch S2-2 are both connected with the full-bridge LLC high-voltage direct current conversion circuit, one contact A is shared by the other end of the switch S1-1 and the other end of the switch S2-1, and one contact B is shared by the other end of the switch S1-2 and the other end of the switch S2-2;
when the electric automobile is in an alternating current charging mode, the power grid supplies power to the power battery E1 and the low-voltage end E2, the Boost circuit plays a role of a power factor correction circuit, and alternating current-direct current conversion is realized; when the electric automobile is in a driving mode, a power battery E1 is adopted to supply power to a low-voltage end E2, and the Boost converting circuit plays a role of a DC-DC converting circuit to realize DC Boost; when the electric automobile is in an alternating current charging mode, the alternating current-direct current switching circuit is switched into an alternating current input mode, and the low-voltage end E2 is charged independently by only starting the half-bridge LLC low-voltage direct current conversion circuit and not starting the full-bridge LLC high-voltage direct current conversion circuit;
the EMI filter circuit comprises a capacitor X1, a capacitor X2 and an inductor T3, wherein the inductor T3 comprises a primary winding T31 and a secondary winding T32, one end of the capacitor X1 is respectively connected with one end of a contact A and one end of the primary winding T31, and the other end of the capacitor X1 is respectively connected with one end of a contact B and one end of the secondary winding T32; one end of a capacitor X2 is respectively connected with the rectifier bridge switching circuit and the other end of the primary winding T31, and the other end of the capacitor X2 is respectively connected with the rectifier bridge switching circuit and the other end of the secondary winding T32;
the rectifier bridge switching circuit comprises a switch S3-1, a switch S3-2 and a rectifier bridge cone Br, wherein one alternating current input end of the rectifier bridge cone Br is used as a first contact of the switch S3-1, the output positive end of the rectifier bridge cone Br is used as a second contact of the switch S3-1, the other alternating current input end of the rectifier bridge cone Br is used as a first contact of the switch S3-2, the output negative end of the rectifier bridge cone Br is used as a second contact of the switch S3-2, one end of a capacitor X2 is connected with a third contact of the switch S3-1, and the other end of the capacitor X2 is connected with the third contact of the switch S3-2;
the Boost circuit comprises an inductor L1, an inductor L2, a MOS tube Q1, a MOS tube Q2, a capacitor C1, a diode D1 and a diode D2, wherein one end of the inductor L1 and one end of the inductor L2 are connected with the positive output end of a rectifier bridge cone Br, one end of the capacitor C1, the drain electrode of the MOS tube Q1 and the drain electrode of the MOS tube Q2 are connected with the negative output end of the rectifier bridge cone Br, the other end of the inductor L1 is connected with the positive electrode of the diode D1 and the source electrode of the MOS tube Q2 respectively, and the other end of the inductor L2 is connected with the positive electrode of the diode D2 and the source electrode of the MOS tube Q1 respectively; the other end of the capacitor C1 is connected with the cathode of the diode D1 and the cathode of the diode D2 respectively;
the full-bridge LLC high-voltage direct-current conversion circuit comprises an MOS tube Q3, an MOS tube Q4, an MOS tube Q5, an MOS tube Q6, a resonant inductor Lr1, a resonant capacitor Cr1, a converter T1, a capacitor C2, a diode D3 and a diode D4, wherein the converter T1 comprises a primary winding T11, a secondary winding T12 and a secondary winding T13, the source electrode of the MOS tube Q3 and the source electrode of the MOS tube Q5 are both connected with the negative electrode of the diode D1, the drain electrode of the MOS tube Q4 and the drain electrode of the MOS tube Q6 are both connected with one end of the capacitor C1, the drain electrode of the MOS tube Q3, the source electrode of the MOS tube Q4 and one end of the resonant inductor Lr1 are connected, one end of the resonant capacitor Cr1 and one end of the primary winding T11 are connected, and the other end of the resonant capacitor Cr1 is connected with the other end of the primary winding T11; the same name end of the secondary winding T12 is connected with the positive electrode of the diode D3, the different name end of the secondary winding T12 is connected with the same name end of the secondary winding T13, the different name end of the secondary winding T13 is connected with the positive electrode of the diode D4, one end of the capacitor C2 is respectively connected with the negative electrode of the diode D3, one end of the switch S2-1 and the negative electrode of the diode D4, the other end of the capacitor C2 is respectively connected with the different name end of the secondary winding T12 and one end of the switch S2-2, one end of the capacitor C2 is connected with the positive electrode of the power battery E1, and the other end of the capacitor C2 is connected with the negative electrode of the power battery E1;
the half-bridge LLC low-voltage direct current conversion circuit comprises a capacitor C3, a capacitor C4, a MOS tube Q7, a MOS tube Q8, a resonant inductor Lr2, a resonant capacitor Cr3, a converter T2, a MOS tube Q9 and a MOS tube Q10, wherein the converter T2 comprises a primary coil T21, a secondary coil T22 and a secondary coil T23, one end of the capacitor C3 is respectively connected with the cathode of a diode D1, the source of the MOS tube Q7 and one end of the resonant capacitor Cr2, the other end of the capacitor C3 is respectively connected with one end of the capacitor C1, the drain of the MOS tube Q8 and one end of the resonant capacitor Cr3, the drain of the MOS tube Q7, the source of the MOS tube Q8 and one end of the resonant inductor Lr2 are connected, the other end of the capacitor Cr2, the other end of the capacitor Cr3 and one end of the primary coil T21 are connected, and the other end of the resonant inductor Lr2 is connected with the other end of the primary coil T21; the same name end of the secondary coil T22 is connected with the source electrode of the MOS tube Q9, the different name end of the secondary coil T22 is connected with the same name end of the secondary coil T23, the different name end of the secondary coil T23 is connected with the source electrode of the MOS tube Q10, one end of the capacitor C4 is connected with the drain electrode of the MOS tube Q9 and the drain electrode of the MOS tube Q10, and the other end of the capacitor C4 is connected with the different name end of the secondary coil T22; one end of the capacitor C4 is connected with the positive electrode of the low-voltage end E2, and the other end of the capacitor C4 is connected with the negative electrode of the low-voltage end E2.
2. The working method of the function integrated vehicle-mounted charger according to claim 1 is characterized in that when a power grid is adopted to supply power to a power battery E1 and a low-voltage end E2, when an electric automobile is in an alternating current charging mode, an alternating current-direct current switching circuit is switched into an alternating current input mode, alternating current is converted into direct current through the alternating current-direct current switching circuit, the direct current is transmitted to a full-bridge LLC high-voltage direct current conversion circuit through an EMI filter circuit, a rectifier bridge switching circuit and a Boost circuit, the Boost circuit plays a role of a power factor correction circuit at the moment, alternating current-direct current conversion is achieved, the direct current is converted into a variable direct current power supply by a full-bridge LLC high-voltage direct current conversion circuit at a later stage, the variable direct current power supply is used for charging the power battery E1, and the low-voltage end E2 is supplied with power after synchronous rectification by a half-bridge LLC low-voltage direct current conversion circuit.
3. The method according to claim 2, wherein when the power battery E1 is used to supply power to the low voltage terminal E2, when the electric vehicle is in a driving mode, the ac/DC switching circuit is switched to a DC input mode, the DC power obtained from the power battery E1 is DC-converted by the EMI filter circuit, the rectifier bridge switching circuit and the Boost circuit and then supplied to the half-bridge LLC low voltage DC conversion circuit, and the Boost conversion circuit plays a role of the DC-DC conversion circuit, and the half-bridge LLC low voltage DC conversion circuit converts the high voltage DC power into the low voltage DC power and supplies power to the low voltage terminal E2 after synchronous rectification, and the half-bridge LLC low voltage DC conversion circuit is supplied by the power battery E1.
4. The method for operating a vehicle-mounted battery charger with integrated functions according to claim 3, wherein when the power grid is used to charge the power battery E1 or the low-voltage terminal E2 separately, the ac-dc switching circuit is switched to the ac input mode when the electric vehicle is in the ac charging mode, and the power battery E1 is charged separately by only enabling the full-bridge LLC high-voltage dc conversion circuit and not enabling the half-bridge LLC low-voltage dc conversion circuit.
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| CN113335084A (en) * | 2021-07-21 | 2021-09-03 | 东蒲联合科技(福建)有限责任公司 | Integrated power distribution system of range-extended electric cold-chain logistics vehicle and logistics vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009046501A1 (en) * | 2009-11-06 | 2011-05-12 | SB LiMotive Company Ltd., Suwon | Battery system with DC / DC converters |
| CN104670040A (en) * | 2015-02-11 | 2015-06-03 | 南京航空航天大学 | Charging and driving integration topology structure of electric automobile |
| CN107650729A (en) * | 2017-10-26 | 2018-02-02 | 科博达技术股份有限公司 | The pre-charging device of the High-Voltage Electrical Appliances of new-energy automobile |
| JP2019058035A (en) * | 2017-09-22 | 2019-04-11 | 矢崎総業株式会社 | Power-receiving device |
| CN111645544A (en) * | 2020-06-10 | 2020-09-11 | 中国矿业大学 | Plug-in electric automobile integrated charging system with active filtering function |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2290967Y (en) * | 1995-02-07 | 1998-09-09 | 杜荣久 | Electronic ballast |
| US6744643B2 (en) * | 2002-09-06 | 2004-06-01 | Phoenixtec Power Co., Ltd. | Push-pull booster circuit with a pair of inductors for coupling |
| US8581147B2 (en) * | 2005-03-24 | 2013-11-12 | Lincoln Global, Inc. | Three stage power source for electric ARC welding |
| CN107662498A (en) * | 2016-07-28 | 2018-02-06 | 比亚迪股份有限公司 | Electric automobile, the multifunctional vehicle mounted charger of electric automobile and its control method |
| CN207410089U (en) * | 2017-10-31 | 2018-05-25 | 北京新能源汽车股份有限公司 | A kind of Vehicular power system and electric vehicle |
| CN108233720B (en) * | 2018-03-13 | 2019-07-02 | 厦门大学 | Fault tolerant based on half bridge redundancy runs full-bridge LLC resonant converter |
| CN108667325A (en) * | 2018-06-05 | 2018-10-16 | 浙江大学 | A kind of high-gain isolated form three-level formula multiple-channel output DC-AC converters of no duty-cycle loss |
| CN109728624A (en) * | 2018-12-27 | 2019-05-07 | 台达电子企业管理（上海）有限公司 | Vehicle-mounted charge-discharge system |
-
2020
- 2020-12-01 CN CN202011383571.XA patent/CN112693340B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009046501A1 (en) * | 2009-11-06 | 2011-05-12 | SB LiMotive Company Ltd., Suwon | Battery system with DC / DC converters |
| CN104670040A (en) * | 2015-02-11 | 2015-06-03 | 南京航空航天大学 | Charging and driving integration topology structure of electric automobile |
| JP2019058035A (en) * | 2017-09-22 | 2019-04-11 | 矢崎総業株式会社 | Power-receiving device |
| CN107650729A (en) * | 2017-10-26 | 2018-02-02 | 科博达技术股份有限公司 | The pre-charging device of the High-Voltage Electrical Appliances of new-energy automobile |
| CN111645544A (en) * | 2020-06-10 | 2020-09-11 | 中国矿业大学 | Plug-in electric automobile integrated charging system with active filtering function |
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