CN111038300A - Vehicle-mounted power electronic integrated device - Google Patents

Vehicle-mounted power electronic integrated device Download PDF

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Publication number
CN111038300A
CN111038300A CN201811196595.7A CN201811196595A CN111038300A CN 111038300 A CN111038300 A CN 111038300A CN 201811196595 A CN201811196595 A CN 201811196595A CN 111038300 A CN111038300 A CN 111038300A
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China
Prior art keywords
power
vehicle
frequency
contactor
bridge
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CN201811196595.7A
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Chinese (zh)
Inventor
沈杰
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LG Electronics Shanghai Research and Development Center Co Ltd
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LG Electronics Shanghai Research and Development Center Co Ltd
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Priority to CN201811196595.7A priority Critical patent/CN111038300A/en
Publication of CN111038300A publication Critical patent/CN111038300A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/30—AC to DC converters
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention provides a vehicle-mounted power electronic integration device which comprises power modules, a first contactor, an alternating current power supply and a vehicle-mounted high-voltage storage battery, wherein the number of the power modules is positive integer times of 3; the power modules comprise an AC/DC power full-bridge unit and a DC/DC conversion unit which are connected with each other, the AC/DC power full-bridge unit in each power module is connected to the alternating current power supply, and the DC/DC conversion unit in each power module is connected to the vehicle-mounted high-voltage storage battery; and the AC/DC power full-bridge unit in each power module is connected to the first contactor, and vehicle-mounted electric integrated control is carried out through the first contactor. The invention can effectively reduce the volume of the vehicle-mounted power electronic integrated device and realize the multifunctional integrated control of the vehicle-mounted power electronic integrated device on the vehicle-mounted equipment.

Description

Vehicle-mounted power electronic integrated device
Technical Field
The invention relates to the technical field of power electronics, in particular to a vehicle-mounted power electronic integrated device.
Background
The phenomenon that various power supplies are used simultaneously generally exists in the existing automobile, and different functions in the automobile can exert self effects to the maximum extent through a power electronic technology. The vehicle-mounted power electronic devices involved in the power chain of the electric automobile and the hybrid electric automobile can integrate a plurality of vehicle-mounted power electronic devices into a whole due to the consideration of the internal space and the control requirement of the automobile, so that the system volume is reduced, the wiring harness is saved, and the cost is reduced.
In the existing integration scheme of the vehicle-mounted power electronic device, two or more power electronic devices are usually installed in the same casing or cooler, and there is no direct coupling and association in control between the power electronic devices, that is, since the existing integration scheme of the vehicle-mounted power electronic device is only a single integration among a plurality of power electronic devices, the electrical control is still controlled independently basically according to the control mode before the integration.
However, the conventional vehicle-mounted power electronic device has a simple integration manner, and cannot effectively optimize the physical volume and the control logic of the integrated system, that is, the conventional vehicle-mounted power electronic device cannot effectively reduce the physical volume and has a complicated control manner.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a vehicle-mounted power electronic integrated device which can effectively reduce the volume of the vehicle-mounted power electronic integrated device and can realize the multifunctional integrated control of the vehicle-mounted power electronic integrated device on vehicle-mounted equipment.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention provides a vehicle-mounted power electronic integrated device, which comprises: the device comprises power modules, a first contactor, an alternating current power supply and a vehicle-mounted high-voltage storage battery, wherein the number of the power modules is positive integral multiple of 3;
the power modules comprise an AC/DC power full-bridge unit and a DC/DC conversion unit which are connected with each other, the AC/DC power full-bridge unit in each power module is connected to the alternating current power supply, and the DC/DC conversion unit in each power module is connected to the vehicle-mounted high-voltage storage battery;
and the AC/DC power full-bridge unit in each power module is connected to the first contactor, and vehicle-mounted electric integrated control is carried out through the first contactor.
Further, still include: a second contactor;
the DC/DC conversion units in the respective power modules are connected to the second contactors, respectively, and perform on-vehicle bypass control via the second contactors.
Further, the AC/DC power full-bridge unit comprises a high-frequency half-bridge branch and a power-frequency half-bridge branch which are connected in parallel;
the high-frequency half-bridge branch circuit is connected with the alternating current power supply, and an inductor is connected between the high-frequency half-bridge branch circuit and the alternating current power supply;
and the power frequency half-bridge branch is connected with the first contactor.
Further, the high frequency half-bridge branch comprises: the high-frequency power tube comprises two high-frequency power tubes which are mutually connected, wherein the source electrode of one high-frequency power tube is connected with the drain electrode of the other high-frequency power tube;
the center of the high-frequency half-bridge branch is connected with the inductor;
wherein, the center of the high-frequency half-bridge branch is positioned between the two high-frequency power tubes.
Further, the power frequency half-bridge branch circuit comprises: the power frequency power tube comprises two power frequency power tubes which are mutually connected, wherein the source electrode of one power frequency power tube is connected with the drain electrode of the other power frequency power tube;
the center of the power frequency half-bridge branch is connected with the first contactor;
and the center of the power frequency half-bridge branch is positioned between the two power frequency power tubes.
Further, the AC/DC power full-bridge unit comprises a plurality of high-frequency half-bridge branches;
each high-frequency half-bridge branch is connected to the alternating current power supply through one inductor.
Furthermore, the AC/DC power full-bridge unit comprises a plurality of power frequency half-bridge branches;
each high-frequency half-bridge branch is connected to the first contactor.
Further, the first contactor is a three-phase contactor.
Further, the second contactor is a two-phase contactor.
Further, the inductor is a PFC inductor.
According to the technical scheme, the invention provides a vehicle-mounted power electronic integrated device, which comprises power modules, a first contactor, an alternating current power supply and a vehicle-mounted high-voltage storage battery, wherein the number of the power modules is positive integer times of 3; the power modules comprise an AC/DC power full-bridge unit and a DC/DC conversion unit which are connected with each other, the AC/DC power full-bridge unit in each power module is connected to the alternating current power supply, and the DC/DC conversion unit in each power module is connected to the vehicle-mounted high-voltage storage battery; each AC/DC power full-bridge unit in the power module is connected to the first contactor, vehicle-mounted electric integrated control is carried out through the first contactor, function multiplexing of the vehicle-mounted electric electronic integrated device can be achieved through arrangement of a vehicle-mounted electric electronic integrated device structure, and multifunctional integrated control of the vehicle-mounted electric electronic integrated device on vehicle-mounted equipment can be achieved while the size of the vehicle-mounted electric electronic integrated device is effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a vehicle-mounted power electronic integrated device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a vehicle-mounted power electronic integrated device including a second contactor according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an AC/DC power full bridge unit in the vehicle-mounted power electronic integrated device in the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a high-frequency half-bridge branch in the vehicle-mounted power electronic integrated device according to the embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a power frequency half-bridge branch in the vehicle-mounted power electronic integrated device in the embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a vehicle-mounted power electronic integrated device in an embodiment of the invention.
Fig. 7 is a schematic diagram of an AC/DC power full bridge unit interleaving parallel structure in an embodiment of the present invention.
Fig. 8 is a schematic diagram of a parallel structure of an AC/DC power full bridge unit in an embodiment of the invention.
Fig. 9 is a schematic diagram of a connection mode of a single-phase ac power supply in an embodiment of the present invention.
Fig. 10 is a schematic diagram of a three-phase ac power connection in an embodiment of the present invention.
Fig. 11 is a flowchart illustrating a control method of a vehicle-mounted power electronic integrated device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.
In order to integrate two or more vehicle-mounted power electronic devices into a whole and achieve the purpose that a single device realizes multiple functions, an embodiment of the present invention provides a specific implementation manner of a vehicle-mounted power electronic integrated device, and referring to fig. 1, the vehicle-mounted power electronic integrated device specifically includes the following contents:
the device comprises power modules 2, a first contactor S1, an alternating current power supply 1 and a vehicle-mounted high-voltage storage battery 3, wherein the number of the power modules 2 is positive integral multiple of 3.
The vehicle-mounted power electronic integrated device can be fixedly installed in a vehicle cab.
Wherein the first contactor S1 may be a three-phase contactor.
It is understood that the compatibility of the ac input/output with respect to single phase and three phase can be satisfied by setting the number of the power modules 2 to a positive integer multiple of 3. If the value of the positive integer multiple is greater than 1, the number of the power modules 2 can also meet the requirement of a plurality of three-phase outputs. Wherein, the three phases can be three-phase three-wire and three-phase four-wire.
The power module 2 comprises an AC/DC power full-bridge unit 21 and a DC/DC conversion unit 22 which are connected with each other, the AC/DC power full-bridge unit 21 in each power module 2 is connected to the alternating current power supply 1, and the DC/DC conversion unit 22 in each power module 2 is connected to the vehicle-mounted high-voltage storage battery 3.
It will be appreciated that the AC/DC power full bridge unit 21 is used to convert AC to DC, and the power flow may be bi-directional, with power flow from the source to the load referred to as "rectification" and power flow from the load back to the source referred to as "active inversion". The DC/DC conversion unit 22 is used to convert a fixed DC voltage into a variable DC voltage. And the topological structure of the DC/DC conversion unit 22, such as Buck, Boost, phase-shifted full bridge, LLC, DAB, etc., is applicable.
The AC/DC power full bridge unit 21 in each of the power modules 2 is connected to the first contactor S1, and performs vehicle-mounted electrical integrated control via the first contactor S1.
It can be understood that the DC/DC conversion units 22 are all connected to the vehicle-mounted high-voltage battery 3 and the AC/DC power full-bridge unit 21 is all connected to the first contactor S1, so that the circuit topology can be shared and reused, and further, the power electronic devices can be effectively saved and the system cost can be reduced.
Based on the above structure, when the first contactor S1 is connected to the ac power supply 1, the power module 2 and the vehicle-mounted high-voltage battery 3 convert ac power into dc power to supply power to the vehicle-mounted charging device; when the first contactor S1 is connected to the vehicle-mounted high-voltage battery 3, the vehicle-mounted high-voltage battery 3 and the power module 2 convert the direct current into alternating current to supply power to the vehicle-mounted control equipment.
It is understood that the vehicle-mounted charging device may be a vehicle-mounted charger, and the vehicle-mounted control device may be an air conditioner, a water pump, a power steering, a power motor controller, and the like.
In the above description, the core multiplexing structure of the vehicle-mounted power electronic integrated device is composed of 3 times of sets of the AC/DC power full-bridge unit 21 and the DC/DC conversion unit 22. Based on this structure, the on-vehicle power electronics integrated device of this application can realize following basic function:
(1) the input power can be (three-phase three-wire and three-phase four-wire).
(2) The inversion from direct current to alternating current can output a single-phase or three-phase power device.
As can be seen from the above description, the vehicle-mounted power electronic integrated device provided in the embodiment of the present invention can implement function multiplexing of the vehicle-mounted power electronic integrated device through the arrangement of the vehicle-mounted power electronic integrated device structure, and can implement multifunctional integrated control of the vehicle-mounted power electronic integrated device for the vehicle-mounted device while effectively reducing the volume of the vehicle-mounted power electronic integrated device.
In order to further improve the multifunctional integrated control of the vehicle-mounted device, so that the vehicle-mounted power electronic integrated device can also implement bypass control, in a specific implementation manner, the vehicle-mounted power electronic integrated device provided in the embodiment of the present invention further specifically includes a second contactor S2, referring to fig. 2, where the second contactor S2 specifically includes the following contents:
the DC/DC conversion units 22 in the power modules 2 are connected to the second contactor S2, respectively, and are subjected to on-vehicle bypass control via the second contactor S2.
It is understood that the second contactor S2 may be a two-phase contactor. The second contactor S2 may bypass the DC/DC sub-module and connect the bus capacitor directly to the high voltage battery.
When the first contactor S1 is connected with the alternating current power supply 1, the second contactor S2 is determined to be opened or closed according to the voltage of the high-voltage battery, and the system works in a vehicle-mounted charging mode; when the first contactor S1 is connected with the vehicle control device, the second contactor S2 can be selectively closed or opened according to the voltage of the high-voltage battery (normally closed is selected to improve the efficiency of the system), and the system works in the vehicle control device running mode.
In order to improve the reliability and performance of the AC/DC power full-bridge unit 21, an embodiment of the present invention further provides a specific implementation manner of the AC/DC power full-bridge unit 21 in the vehicle-mounted power electronic integrated device, and referring to fig. 3, the AC/DC power full-bridge unit 21 specifically includes the following contents:
each AC/DC power full-bridge unit 21 comprises a high-frequency half-bridge branch 211 and a power-frequency half-bridge branch 212 which are connected in parallel; high frequency half-bridge branch road 211 with alternating current power supply 1 connects, and high frequency half-bridge branch road 211 with be connected with inductance L between the alternating current power supply 1, power frequency half-bridge branch road 212 with first contactor S1 is connected.
It can be understood that the high-frequency half-bridge branch 211 may be a branch where a high-frequency power electronic switch is located, and the power-frequency half-bridge branch 212 may be a branch where a power-frequency power electronic switch is located. The inductor L may be a power Factor correction pfc (power Factor correction) inductor L.
Based on the foregoing specific implementation of the AC/DC power full-bridge unit 21, referring to fig. 4, the present invention further provides a specific implementation of the high-frequency half-bridge branch 211 in the AC/DC power full-bridge unit 21, which specifically includes the following steps:
two high-frequency power tubes S connected to each otherHAnd one of the high-frequency power tubes SHWith another said high-frequency power tube SHThe drain connection of (1); the center of the high-frequency half-bridge branch 211 is connected with the inductor L; wherein the center of the high-frequency half-bridge branch 211 is located at two high-frequency power tubes SHIn the meantime.
Based on the foregoing specific implementation of the AC/DC power full-bridge unit 21, referring to fig. 5, the present invention further provides a specific implementation of the power frequency half-bridge branch 212 in the AC/DC power full-bridge unit 21, which specifically includes the following contents:
the power frequency half-bridge branch 212 includes: two power frequency power tubes S connected with each otherLAnd one of the power frequency power tubes SLSource electrode of and another power frequency power tube SLThe drain connection of (1); the center of the power frequency half-bridge branch 212 is connected with the first contactor S1; wherein, the center of the power frequency half-bridge branch 212 is located at two power frequency power tubes SLIn the meantime.
In order to further improve the applicability of the vehicle-mounted power electronic integrated device and the application universality of the vehicle-mounted power electronic integrated device, the invention further provides three specific embodiments of the AC/DC power full-bridge unit 21, and the staggered parallel structure of the AC/DC power full-bridge unit 21 specifically includes the following contents:
in the first embodiment of the AC/DC power full-bridge unit 21, the AC/DC power full-bridge unit 21 includes a plurality of high-frequency half- bridge branches 211 and 1 power-frequency half-bridge branch 212, in this example, three high-frequency half-bridge branches 211 are taken as an example, each high-frequency half-bridge branch 211 is connected to the AC power supply 1 through one inductor L, and the power-frequency half-bridge branch 212 is connected to the first contactor S1.
In a second embodiment of the first AC/DC power full-bridge unit 21, the AC/DC power full-bridge unit 21 includes 1 high-frequency half-bridge branch 211 and a plurality of power-frequency half-bridge branches 212, in this example, three power-frequency half-bridge branches 212 are taken as an example, the high-frequency half-bridge branch 211 is connected to the AC power supply 1 through one inductor L, and the three power-frequency half-bridge branches 212 are all connected to the first contactor S1.
In the third embodiment of the first AC/DC power full-bridge unit 21, the AC/DC power full-bridge unit 21 includes a plurality of high-frequency half-bridge branches 211 and a plurality of power-frequency half-bridge branches 212, in this example, three high-frequency half-bridge branches 211 and three power-frequency half-bridge branches 212 are taken as an example, each high-frequency half-bridge branch 211 is connected to the AC power supply 1 through one inductor L, and each power-frequency half-bridge branch 212 is connected to the first contactor S1.
To further explain the scheme, the invention further provides a specific application example of the vehicle-mounted power electronic integrated device, taking a vehicle-mounted charger and a vehicle-mounted air conditioner variable frequency controller as examples, and referring to fig. 6, fig. 6 shows an integrated scheme system of the vehicle-mounted charger and the vehicle-mounted air conditioner controller used in the invention. The vehicle-mounted power electronic integrated device specifically comprises the following contents:
the vehicle-mounted power electronic integrated device mainly comprises three power modules 2, namely a module I, a module II and a module III. Each power module 2 has two sub-modules, an AC/DC power full bridge unit 21 and a DC/DC conversion unit 22.
Generally, according to the totem-pole PFC control method, the first high-frequency power tube SH1-xAnd a second high-frequency power tube SH2-xBy using high-frequency complementary switch, the first power-frequency power tube SL1-xAnd a second power frequency power tube SL2-xAnd a power frequency complementary switch is adopted, and other feasible control methods can be adopted. The DC/DC conversion unit 22 may use various circuit topologies, such as Buck, boost, phase-shifted full bridge, LLC, other feasible DC/DC conversion circuits, and the like. First high frequency power tube S in each AC/DC power full bridge unit 21H1-xAnd a second high-frequency power tube SH2-xComposed half-bridge middle point connection PFC inductance LxPFC inductance LxThe outlet wire at the other end is connected with the live wire of the alternating current power supply 1; first power frequency power tube SL1-xAnd a second power frequency power tube SL2-xThe half bridge is formed with a midpoint connected to a first contact S1. The first contactor S1 is a three-phase contactor and has two contact states, one is a first industrial frequency power tube SL1-xAnd a second power frequency power tube SL2-xThe middle point of the formed half bridge is connected to the N line of the alternating current power supply 1, and the other is that the first power frequency power tube SL1-xAnd a second power frequency power tube SL2-xThe middle point of the half bridge is connected to the three-phase terminal of the air conditioner motor. The second contactor S2 is a two-phase contactor that can bypass the DC/DC conversion unit 22 and connect the bus capacitor directly to the high voltage battery. When it comes toWhen one contactor S1 is connected with the alternating current power supply 1, the second contactor S2 is determined to be opened or closed according to the voltage of the high-voltage battery, and the system works in a vehicle-mounted charging mode; when the first contactor S1 is connected with the vehicle air conditioner motor, the second contactor S2 can be selectively closed or opened according to the voltage of the high-voltage battery (normally closed is selected to improve the efficiency of the system), and the system works in a vehicle air conditioner running mode.
Referring to fig. 7, according to the totem-pole PFC control method, a first high-frequency power transistor SH1-xAnd a second high-frequency power tube SH2-xAdopts high-frequency complementary switches, n groups of half-bridge structures are connected in parallel, and a point outgoing line in each group of half-bridge is connected with a PFC inductorL1.x. The partial n groups of parallel half-bridge structures are equivalent to the first high-frequency power tube SHS in the AC/DC power full-bridge unit 21 shown in FIG. 6H1-xAnd a second high frequency power tube SHSH2-xForming a half-bridge structure.
Referring to fig. 8, n high frequency power transistors SH1-xHigh frequency power tube SHS in parallel constituting AC/DC power full bridge unit 21 shown in FIG. 6H1-x. N high-frequency power transistors SH2-xParallel connection to form the high frequency power tube S in the AC/DC power full bridge unit 21 shown in FIG. 6H2-xN power frequency power tubes SL1-xThe power frequency power tube S in the AC/DC power full bridge unit 21 shown in FIG. 6 is formed by parallel connectionL1-xN power frequency power tubes SL2-xThe power frequency power tube S in the AC/DC power full bridge unit 21 shown in FIG. 6 is formed by parallel connectionL2-x。
In the above description, x represents different variations of each identical device, and x is a positive integer of 1 to n. For example, a high-frequency power tube SH2-xRepresenting a high-frequency power tube SH2The xth one of (1).
Wherein S in FIG. 6H1-1、SH1-2And SH1-3All are first high-frequency power tubes; sH2-1、SH2-2And SH2-3All are second high-frequency power tubes; sL1-1、SL1-2And SL1-3All are first power frequency power tubes; sL2-1、SL2-2And SL2-3All are second power frequency power tubes; u, V, W of AC power supply 1 are respectively in AC power supply 1Three phases, N representing the hot line of the ac power supply 1. L is1To L3Are all inductors L.
In addition, the interleaved parallel structure shown in fig. 7 may be used in combination with the device parallel structure shown in fig. 8 in practical use.
The input of the alternating current power supply 1 of the integrated power electronic integrated device is a single-phase/three-phase power supply compatible scheme. Fig. 9 shows a method for connecting the integrated power electronic integrated device to the single-phase ac power supply 1; fig. 10 shows a method for connecting the integrated power electronic integrated device to the three-phase ac power supply 1. When the single-phase alternating current power supply 1 is switched on, three PFC inductors L shown in FIG. 61、L2And L3The leading-out terminals of the three-phase contactor are connected with a phase line (L line) of a single-phase alternating current power supply 1, and the three-phase terminals of the three-phase contactor are connected with a zero line (N line). When the three-phase AC power supply 1 is switched on, three PFC inductors L shown in FIG. 61、L2And L3The outlet ends are respectively connected with three phase lines (U, V, W) of a three-phase alternating current power supply 1, and the three-phase terminals of the three-phase contactor are connected with a zero line (N line). If the three-phase AC power supply 1 is a three-phase three-wire system power supply without a zero line (N line), the power electronic device can still normally operate, and the three-phase contactor is only connected with the vehicle-mounted air conditioner motor and is not connected with the zero line (N line) of the AC power supply 1 any more.
In the above description, the vehicle-mounted power electronic integrated device in the application example of the present invention is composed of three power modules 2, each power module 2 includes an AC/DC power full bridge unit 21 and a DC/DC conversion unit 22, and the inputs of the three power modules 2 can be connected to a single-phase or three-phase AC power supply 1, and also can be connected to a vehicle-mounted air conditioner motor through the first contactor S1. The output of the DC/DC conversion unit 22 is connected to the vehicle-mounted high-voltage battery pack. Meanwhile, the DC/DC conversion unit 22 may be bypass-controlled through the second contactor S2.
As can be seen from the above description, the vehicle-mounted power electronic integrated device provided in the application example of the present invention integrates two or more vehicle-mounted power electronic devices to realize diversified functions of the vehicle-mounted power electronic devices, and simultaneously, by multiplexing the power electronic devices in the circuit topology, the system size is greatly reduced, the wiring harness is saved, and the system cost is reduced. In addition, the overall performance of the system is improved through the overall control optimization of the system.
Based on this, the vehicle-mounted power electronic integrated device provided in one or more embodiments of the present application includes at least the following beneficial effects:
1) and the circuit topology structure is shared, so that power electronic devices are saved, and the system cost is reduced.
2) The heat dissipation mechanism and the machine shell are shared, so that the volume and the weight of the system are greatly reduced.
3) The circuits are coupled to each other, reducing interconnections and saving wiring harnesses and connectors.
4) The overall performance of the system is conveniently optimized and controlled.
In order to integrate two or more vehicle-mounted power electronic devices into a whole and achieve the purpose that a single device realizes multiple functions, an embodiment of the present invention further provides a specific implementation manner of a control method of a vehicle-mounted power electronic integrated device, and referring to fig. 11, the control method of the vehicle-mounted power electronic integrated device specifically includes the following contents:
step 100: when the first contactor S1 is connected to the ac power supply 1, the power module 2 and the vehicle-mounted high-voltage battery 3 convert ac power into dc power to supply power to the vehicle-mounted charging device.
Step 200: when the first contactor S1 is connected to the vehicle-mounted high-voltage battery 3, the vehicle-mounted high-voltage battery 3 and the power module 2 convert the direct current into alternating current to supply power to the vehicle-mounted control equipment.
As can be seen from the above description, the control method of the vehicle-mounted power electronic integrated device according to the embodiment of the present invention can implement function multiplexing of the vehicle-mounted power electronic integrated device through the configuration of the vehicle-mounted power electronic integrated device structure, and can further implement multifunctional integrated control of the vehicle-mounted power electronic integrated device for the vehicle-mounted device while effectively reducing the size of the vehicle-mounted power electronic integrated device.
In one embodiment, the vehicle-mounted power electronic integrated device further includes a second contactor S2 connected to the DC/DC conversion unit 22 of each power module 2, and the control method of the vehicle-mounted power electronic integrated device further includes the following steps:
step 300: when the first contactor S1 is connected with the AC power supply 1, the second contactor S2 judges whether to disconnect the second contactor S2 according to the voltage of the vehicle-mounted high-voltage storage battery 3 and the power consumption condition of the vehicle-mounted charging equipment;
if yes, go to step 400; otherwise, step 500 is performed.
Step 400: the second contactor S2 is opened, and the vehicle-mounted bypass control is performed while the vehicle-mounted charging device is supplied with power.
Step 500: closing the second contactor S2.
In one embodiment, the vehicle-mounted power electronic integrated device further includes a second contactor S2 connected to the DC/DC conversion unit 22 of each power module 2, and the control method of the vehicle-mounted power electronic integrated device further includes the following steps:
step 600: when the first contactor S1 is turned on the vehicle-mounted high-voltage storage battery 3, the second contactor S2 judges whether to close the second contactor S2 according to the voltage of the vehicle-mounted high-voltage storage battery 3 and the power utilization condition of vehicle-mounted control equipment;
if yes, go to step 700; otherwise, step 800 is performed.
Step 700: closing the second contactor S2.
Step 800: and opening the second contactor S2, so that the vehicle-mounted power electronic integrated device can realize bypass control.
As can be seen from the above description, the control method for the vehicle-mounted power electronic integrated device according to the embodiment of the present invention can implement function multiplexing of the vehicle-mounted power electronic integrated device, and can further implement multifunctional integrated control of the vehicle-mounted power electronic integrated device for the vehicle-mounted device while effectively reducing the size of the vehicle-mounted power electronic integrated device.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the hardware + program class embodiment, since it is substantially similar to the method embodiment, the description is simple, and the relevant points can be referred to the partial description of the method embodiment.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Although the present application provides method steps as described in an embodiment or flowchart, additional or fewer steps may be included based on conventional or non-inventive efforts. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an actual apparatus or client product executes, it may execute sequentially or in parallel (e.g., in the context of parallel processors or multi-threaded processing) according to the embodiments or methods shown in the figures.
Although embodiments of the present description provide method steps as described in embodiments or flowcharts, more or fewer steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an actual apparatus or end product executes, it may execute sequentially or in parallel (e.g., parallel processors or multi-threaded environments, or even distributed data processing environments) according to the method shown in the embodiment or the figures. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the presence of additional identical or equivalent elements in a process, method, article, or apparatus that comprises the recited elements is not excluded.
For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, in implementing the embodiments of the present description, the functions of each module may be implemented in one or more software and/or hardware, or a module implementing the same function may be implemented by a combination of multiple sub-modules or sub-units, and the like. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, 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. In addition, the shown or discussed couplings or direct couplings or communication connections between each other may be through interfaces, devices or units
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the specification. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only an example of the embodiments of the present disclosure, and is not intended to limit the embodiments of the present disclosure. Various modifications and variations to the embodiments described herein will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present specification should be included in the scope of the claims of the embodiments of the present specification.

Claims (10)

1. An on-vehicle power electronics integrated device, comprising: the device comprises power modules, a first contactor, an alternating current power supply and a vehicle-mounted high-voltage storage battery, wherein the number of the power modules is positive integral multiple of 3;
the power modules comprise an AC/DC power full-bridge unit and a DC/DC conversion unit which are connected with each other, the AC/DC power full-bridge unit in each power module is connected to the alternating current power supply, and the DC/DC conversion unit in each power module is connected to the vehicle-mounted high-voltage storage battery;
and the AC/DC power full-bridge unit in each power module is connected to the first contactor, and vehicle-mounted electric integrated control is carried out through the first contactor.
2. The vehicle-mounted power electronic integration device according to claim 1, further comprising: a second contactor;
the DC/DC conversion units in the respective power modules are connected to the second contactors, respectively, and perform on-vehicle bypass control via the second contactors.
3. The vehicle-mounted power electronic integrated device according to claim 1, wherein the AC/DC power full-bridge unit comprises a high-frequency half-bridge branch and a power-frequency half-bridge branch which are connected in parallel;
the high-frequency half-bridge branch circuit is connected with the alternating current power supply, and an inductor is connected between the high-frequency half-bridge branch circuit and the alternating current power supply;
and the power frequency half-bridge branch is connected with the first contactor.
4. The on-vehicle power electronics integrated device of claim 3, characterized in that the high-frequency half-bridge branch comprises: the high-frequency power tube comprises two high-frequency power tubes which are mutually connected, wherein the source electrode of one high-frequency power tube is connected with the drain electrode of the other high-frequency power tube;
the center of the high-frequency half-bridge branch is connected with the inductor;
wherein, the center of the high-frequency half-bridge branch is positioned between the two high-frequency power tubes.
5. The vehicle-mounted power electronic integration device according to claim 3, wherein the power frequency half-bridge branch comprises: the power frequency power tube comprises two power frequency power tubes which are mutually connected, wherein the source electrode of one power frequency power tube is connected with the drain electrode of the other power frequency power tube;
the center of the power frequency half-bridge branch is connected with the first contactor;
and the center of the power frequency half-bridge branch is positioned between the two power frequency power tubes.
6. The on-vehicle power electronics integrated device of claim 3, characterized in that a plurality of said high frequency half bridge branches are included in said AC/DC power full bridge unit;
each high-frequency half-bridge branch is connected to the alternating current power supply through one inductor.
7. The vehicle-mounted power electronic integrated device according to claim 3 or 6, wherein the AC/DC power full-bridge unit comprises a plurality of power frequency half-bridge branches;
each high-frequency half-bridge branch is connected to the first contactor.
8. The on-vehicle power electronic integration device according to claim 1, wherein the first contactor is a three-phase contactor.
9. The on-vehicle power electronic integration device according to claim 2, wherein the second contactor is a two-phase contactor.
10. The on-board power electronics integration device of claim 4, wherein the inductor is a PFC inductor.
CN201811196595.7A 2018-10-15 2018-10-15 Vehicle-mounted power electronic integrated device Withdrawn CN111038300A (en)

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JPH0739014A (en) * 1993-07-23 1995-02-07 Hitachi Ltd Charging device for vehicle
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CN106452279A (en) * 2016-09-21 2017-02-22 渤海大学 Electric vehicle driving motor controller with charging function and control method thereof
CN206155213U (en) * 2016-11-17 2017-05-10 安徽工程大学 Based on V2G function motor drive integrated device that charges that charges
CN207039262U (en) * 2017-06-07 2018-02-23 上海蔚来汽车有限公司 Power supply change-over device, charging equipment and electrical changing station
CN107791875A (en) * 2017-11-09 2018-03-13 南通大学 A kind of nine phases Permanent Magnet and Electric used for electric vehicle drives Reconstructed on-board charging system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0739014A (en) * 1993-07-23 1995-02-07 Hitachi Ltd Charging device for vehicle
CN103368239A (en) * 2012-04-04 2013-10-23 沃尔沃汽车公司 A circuit for charging a battery and for driving a three-phase electrical machine
CN106452279A (en) * 2016-09-21 2017-02-22 渤海大学 Electric vehicle driving motor controller with charging function and control method thereof
CN206155213U (en) * 2016-11-17 2017-05-10 安徽工程大学 Based on V2G function motor drive integrated device that charges that charges
CN207039262U (en) * 2017-06-07 2018-02-23 上海蔚来汽车有限公司 Power supply change-over device, charging equipment and electrical changing station
CN107791875A (en) * 2017-11-09 2018-03-13 南通大学 A kind of nine phases Permanent Magnet and Electric used for electric vehicle drives Reconstructed on-board charging system

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Application publication date: 20200421