CN112550023A

CN112550023A - Electric automobile electric integration device and method and electric automobile

Info

Publication number: CN112550023A
Application number: CN202011328897.2A
Authority: CN
Inventors: 韦敏刚
Original assignee: Guangzhou Xiaopeng Motors Technology Co Ltd; Guangzhou Chengxingzhidong Automotive Technology Co., Ltd
Current assignee: Guangzhou Xiaopeng Motors Technology Co Ltd; Guangzhou Chengxingzhidong Automotive Technology Co., Ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-03-26
Anticipated expiration: 2040-11-24
Also published as: CN112550023B

Abstract

The application relates to an electric automobile electrical integration device and method and an electric automobile. The electric integrated device comprises a direct current input port and an alternating current input port, and is used for charging a battery pack of the electric automobile through a direct current power supply and an alternating current power supply respectively; the first driving module and the second driving module are used for respectively driving a first motor and a second motor of the electric automobile; the device is still including connecting in the switch module of first drive module and second drive module, the switch module will respectively at different on-off state the circuit that electric integrated device switched into different mode, wherein, different mode's circuit includes OBC charging circuit, fills boost circuit soon and V2V circuit. The scheme that this application provided has avoided the quick charge stake among the correlation technique to be difficult to the electric automobile of high voltage battery framework to charge or the problem of full charge, can realize multiple functions, has reduced electric automobile's cost.

Description

Electric automobile electric integration device and method and electric automobile

Technical Field

The application relates to the technical field of new energy automobiles, in particular to an electric automobile electrical integration device and method and an electric automobile.

Background

With the development of electric vehicles, in order to improve the endurance mileage, power performance and other indexes of the electric vehicles, the electric vehicles with high-voltage battery architecture have become the development direction of the whole vehicles.

Because the maximum output voltage of the charging pile in the related technology is lower, the battery pack of the electric automobile with the high-voltage battery framework cannot be charged or fully charged. For example, in the charging piles of two specifications in the related art, the maximum output voltage is 500V and 750V, the 500V fast charging pile cannot charge the 800V power battery, the 750V fast charging pile cannot fully charge the 800V electric vehicle, and during charging, the slow charging pile needs to be manually replaced to finally fully charge the electric vehicle. In the related art, a way to solve the above problem is to add a set of boosting device on the fast charging loop, where the boosting device is used to boost the voltage of 500V or 750V to 800V, so as to fully charge the power battery of the 800V platform. The defect of the mode is that high-power equipment including an electric drive module, an alternating current charging module or a direct current charging module and the like is required to be assembled for the electric automobile, so that the manufacturing cost of the electric automobile is increased, and the space design of the whole automobile and the EMC of the whole automobile are greatly tested.

Disclosure of Invention

In order to solve or partially solve the problems in the related art, the application provides an electric automobile electrical integration device, a method and an electric automobile, wherein the electric automobile electrical integration device can charge or fully charge a battery pack of a high-voltage platform.

This application first aspect provides an electric automobile electrical integrated device, includes:

the direct current input port and the alternating current input port are used for charging a battery pack of the electric automobile through a direct current power supply and an alternating current power supply respectively;

the first driving module and the second driving module are used for respectively driving a first motor and a second motor of the electric automobile;

the device is still including connecting in the switch module of first drive module and second drive module, the switch module is used for will at different on-off state the electric integrated device of electric automobile switches into the circuit of different mode, wherein, the circuit of different mode includes OBC charging circuit, fills boost circuit and V2V circuit soon.

In one embodiment, the different operating modes of the electrical integration device comprise an OBC charging mode, a fast charge boost mode and a V2V mode;

when the switch module is in different on-off states, the electric automobile electrical integration device is switched to the OBC charging mode, the fast charging and boosting mode or the V2V mode;

the OBC charging mode comprises the OBC charging circuit, the fast boost mode comprises the fast boost circuit, and the V2V circuit comprises the V2V circuit.

In one of the embodiments, the first and second electrodes are,

the OBC charging circuit is provided with a PFC circuit comprising the second driving module and a Buck circuit comprising the first driving module, the PFC circuit comprises an inductance module connected to the input end of the second driving module and the alternating current input port, the output end of the PFC circuit is connected with the input end of the Buck circuit, and the Buck circuit is used for adjusting the voltage output by the PFC circuit to be adapted to the charging voltage of the battery pack; or

The OBC charging circuit is provided with a PFC circuit comprising the second driving module and an inverter circuit comprising the first driving module; the OBC charging circuit further comprises an isolation rectification circuit, the output end of the inverter circuit is connected with the input end of the isolation rectification circuit, and the output end of the isolation rectification circuit is connected to the battery pack.

In one embodiment, the fast charge and Boost circuit comprises a Boost circuit including the first driving module, an input end of the Boost circuit is connected with the direct current input port, an input end of the Boost circuit is connected with a positive electrode and a negative electrode of the battery pack, and the Boost circuit is used for charging the battery pack after boosting the voltage input by the direct current input port; or

The V2V circuit has and includes the Buck step-down circuit of first drive module, Buck step-down circuit's output is connected the positive negative pole of battery package, Buck step-down circuit's output is connected direct current input port, Buck step-down circuit is used for passing through direct current input port is to outer output electric quantity.

In one embodiment, the plurality of switches of the switch module comprises at least a first switch, a second switch, a third switch, a fourth switch, a fifth switch, and a sixth switch;

the first motor and the second motor are three-phase alternating current motors, the first driving module and the second driving module comprise three-phase bridge arms, and a first capacitor is connected in parallel between the three-phase bridge arm of the first driving module and the three-phase bridge arm of the second driving module;

the positive electrode of the battery pack is connected to a first bus end of a three-phase bridge arm of the first driving module through the second switch, is connected to a connection point of a three-phase coil in the first motor through the first switch and the third switch, and is connected to the direct current input port through the third switch and the fourth switch;

the midpoint of each of the three-phase arms of the second driving module is connected to the three-phase coil of the second motor through the fifth switch, the sixth switch and the seventh switch, respectively.

In one embodiment, the plurality of switches of the switch module further includes a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, and a thirteenth switch;

the middle point of each bridge arm of the three-phase bridge arms of the first driving module is connected to the three-phase input end of the isolation rectification circuit through the seventh switch, the eighth switch and the ninth switch respectively;

the middle point of each of the three-phase bridge arms of the first driving module is connected to the three-phase coil of the first motor through the tenth switch, the eleventh switch and the twelfth switch respectively;

and the negative electrode of the battery pack is connected to the second bus end of the three-phase bridge arm of the first driving module through the fourteenth switch.

In one embodiment, when the first switch and the third switch are closed and the second switch, the fourth switch, the fifth switch, the sixth switch and the seventh switch are opened, the electric vehicle electrical integration device is switched to the OBC charging circuit; or

The seventh switch, the eighth switch, and the ninth switch are closed, and when the first switch, the second switch, the third switch, the fourth switch, the fifth switch, the sixth switch, the tenth switch, the eleventh switch, and the twelfth switch are opened, the electric vehicle electrical integration device is switched to the OBC charging circuit.

In one embodiment, when the first switch, the second switch and the fourth switch are closed and the third switch, the fifth switch, the sixth switch and the seventh switch are opened, the electric automobile electric integrated device is switched to the fast charging and boosting circuit; or

When the first switch, the second switch and the fourth switch are closed, and simultaneously the third switch, the fifth switch, the sixth switch and the seventh switch are opened, the electric vehicle electric integrated device is switched to the V2V circuit.

In one embodiment, the isolation rectification circuit comprises an isolation module connected to the output end of the first driving module and a rectification module connected to the output end of the isolation module.

The second aspect of the application provides an electric automobile, which comprises the electric automobile electric integrated device.

A third aspect of the present application provides an electrical integration method, comprising:

acquiring control information of a switch module in an electrical integrated device; the electric integrated device comprises a direct current input port, an alternating current input port, a first driving module and a second driving module;

controlling the switch module to be in different on-off states according to the control information of the switch module, and switching the electrical integrated device into circuits with different working modes according to the different on-off states; the circuits in different working modes comprise an OBC charging circuit, a quick charging and boosting circuit and a V2V circuit.

In one embodiment, the circuit for controlling the switch module to be in different on-off states according to the control information of the switch module and switching the electrical integrated device into different operating modes according to the different on-off states includes:

and controlling the switch module to be in different on-off states according to the control information of the switch module, and switching the electrical integration device into an OBC charging mode, a quick charging and boosting mode or a V2V mode according to the different on-off states.

In one embodiment, the controlling the switch module to be in different on-off states according to the control information of the switch module, and switching the electrical integration apparatus to be in the OBC charging mode, the fast charging and boosting mode, or the V2V mode according to the different on-off states includes:

respectively controlling the switch modules to be in different on-off states according to the control information of the switch modules; and controlling the three-phase bridge arm of the first driving module and the three-phase bridge arm of the second driving module to be in different conduction states according to different on-off states of a switch module, and switching the electrical integration device into the OBC charging mode, the fast charging and boosting mode or the V2V mode according to different conduction states.

In one embodiment, a PFC circuit and a Buck circuit in the OBC charging mode are formed according to a first on-off state of the switch module and a first on-state of the three-phase bridge arm, and the Buck circuit is used for adjusting voltage output by the PFC circuit to be adaptive to charging voltage of a battery pack; or

And forming an isolation rectification circuit in the OBC charging mode according to the second on-off state of the switch module and the second conduction state of the three-phase bridge arm, wherein the isolation rectification circuit is used for electrical isolation of the OBC charging mode.

In one embodiment, a Boost circuit in the fast charge and Boost mode is formed according to a third on-off state of the switch module and a third on-state of the three-phase bridge arm, and the Boost circuit is used for boosting the voltage input by the direct current input port and then charging the battery pack; or

And forming a Buck voltage reduction circuit in the V2V mode according to a fourth on-off state of the switch module and a fourth on-state of the three-phase bridge arm, wherein the Buck voltage reduction circuit is used for outputting electric quantity to the outside through the direct current input port.

The technical scheme provided by the application can comprise the following beneficial effects:

the electric integrated device of the electric automobile comprises a direct current input port and an alternating current input port, wherein the direct current input port and the alternating current input port are used for charging a battery pack of the electric automobile through a direct current power supply and an alternating current power supply respectively; the first driving module and the second driving module are used for respectively driving a first motor and a second motor of the electric automobile; the electric automobile electric integrated device is characterized by further comprising a switch module connected to the first electric driving module and the second electric driving module, wherein the switch module is used for switching the electric automobile electric integrated device into circuits with different working modes according to preset conditions, and the circuits with different working modes comprise an OBC charging circuit, a quick charging and boosting circuit and a V2V circuit. The scheme of this embodiment, the drive circuit integration multiplexing with two motor drive makes the circuit can switch into different mode's circuit respectively under the condition of difference, and then realizes different functions, has not only avoided the quick electric pile that fills among the correlation technique to be difficult to the electric automobile that is the high-voltage battery framework to charge or the problem of full charge, can realize multiple functions under the condition that does not increase extra high-power equipment moreover, has reduced whole car cost.

The electric automobile electric integration method comprises the steps of obtaining control information of a switch module in an electric integration device, wherein the electric integration device comprises a direct current input port, an alternating current input port, a first driving module and a second driving module; the switch module is controlled to be in different on-off states according to the control information of the switch module, the electric integrated device is switched to circuits of different working modes through the different on-off states, and the circuits of the different working modes comprise an OBC charging circuit, a quick charging and boosting circuit and a V2V circuit. Through the processing, three-phase bridge arms of the first driving module IPU1 and the second driving module IPU2 can be integrated and reused, so that circuits with different working modes are formed, different working modes can be flexibly switched and selected according to actual use requirements, the integration level of the circuits is improved, multiple functions can be realized, not only can the battery pack of a high-voltage platform be charged or fully charged, but also the cost of the whole vehicle is reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.

Fig. 1 is a circuit diagram of an electric vehicle electrical integrated device according to an embodiment of the present application;

fig. 2 is a circuit diagram of an OBC charging circuit according to an embodiment of the present application;

fig. 3 is a circuit diagram of a fast charge/boost circuit according to an embodiment of the present application;

FIG. 4 is a circuit diagram of a V2V circuit according to an embodiment of the present application;

FIG. 5 is a circuit diagram of an OBC charging circuit according to another embodiment of the present application;

FIG. 6 is a circuit diagram of a fast charge boost circuit according to another embodiment of the present application;

FIG. 7 is a circuit diagram of a V2V circuit shown in another embodiment of the present application;

FIG. 8 is a schematic diagram illustrating a method for electrical integration of an electric vehicle according to an embodiment of the present application;

fig. 9 is another schematic diagram of an electric vehicle electrical integration method according to an embodiment of the present application.

Detailed Description

Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the present application.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The maximum output voltage of a charging pile in the related art is low, generally, boosting equipment needs to be additionally arranged on a quick charging loop to fully charge a battery pack of a high-voltage platform, so that the manufacturing cost of an electric automobile can be improved, and aiming at the problems, the embodiment of the application provides an electric integration device and method of the electric automobile, so that the full charge of the battery pack of the high-voltage platform can be effectively realized while the cost of the whole automobile is reduced.

The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Fig. 1 is a circuit diagram of an electric integrated device of an electric vehicle according to an embodiment of the present application.

Referring to fig. 1, the electric integrated device for an electric vehicle of the present embodiment includes a dc input port E1 and an ac input port E2, which are used for charging a battery pack BAT of the electric vehicle through a dc power supply and an ac power supply, respectively; the first drive module IPU1 and the second drive module IPU2 are used for driving a first motor V1 and a second motor V2 of the electric automobile respectively; the electric automobile electric integrated device switching circuit comprises an electric first driving module IPU1 and an electric second driving module IPU2, and further comprises a switch module connected with the electric first driving module IPU1 and the electric second driving module IPU2, wherein the switch module is used for switching the electric automobile electric integrated device into circuits with different working modes in different on-off states, and the circuits with the different working modes comprise an OBC charging circuit, a quick charging and boosting circuit and a V2V circuit. The scheme of this embodiment has utilized two motor drive of electric automobile, integrates the reconsitution with two motor drive's drive module, makes electric integrated device can get into different mode respectively under the condition of difference, and then realizes different functions, has not only avoided the problem that quick charging pile among the correlation technique is difficult to charge or is full of the electricity for the electric automobile of high-voltage battery framework, can realize multiple functions under the condition that does not increase extra high-power equipment moreover, has reduced electric automobile's cost.

The battery pack BAT of this embodiment may be a high-voltage platform battery pack, for example, an 800V platform battery pack, the first motor V1 and the second motor V2 may be three-phase ac motors, and the first drive module IPU1, the second drive module IPU2, and the three-phase ac motors driven correspondingly together constitute a power system of the four-wheel drive electric vehicle. In this embodiment, on the basis of the second driving module IPU2, the first inductor L1, the second inductor L2, and the third inductor L3 are added to the ac input port E2, and the second driving module IPU2 is combined to form a PFC (Power Factor Correction) circuit, and by setting a switch module and modifying the driving logic of the first driving module IPU1, circuits in different operating modes can be formed.

The different working modes of the electric automobile electric integrated device can comprise an OBC charging mode, a quick charging and boosting mode and a V2V mode. When the switch module is in different on-off states, the electrical integration device can be in a DC-AC (direct current-alternating current conversion) inversion mode, an AC-DC (alternating current-direct current conversion) alternating current charging mode and a high-voltage DC-DC (direct current-direct current conversion) mode respectively. In one implementation, a motor drive circuit or alternating current V2V (vehicle-to-vehicle charging) circuit may be included in the DC-AC inverter mode; the AC-DC alternating current charging mode can comprise an OBC (On-board charger) charging circuit; the high voltage DC-DC mode may include a fast charge boost circuit or V2V circuit.

With continued reference to fig. 1, in one implementation, the switch module includes a first switch S1, a second switch S2, a third switch S3, a fourth switch S4, a fifth switch S5, a sixth switch S6, and a seventh switch S7.

The first drive module IPU1 and the second drive module IPU2 include a three-phase bridge arm formed by a plurality of power tubes, and a first capacitor C1 is connected in parallel between the three-phase bridge arm of the first drive module IPU1 and the three-phase bridge arm of the second drive module IPU 2; the positive electrode of the battery pack BAT is connected to a first bus end of a three-phase bridge arm of the first drive module IPU1 through a second switch S2, and the first bus end can be a common drain end of a power tube in the three-phase bridge arm; the positive electrode of the battery pack BAT is also connected to a connection point of a three-phase coil in the first motor V1 through a first switch S1 and a third switch S3, and the connection point is an N-wire of the three-phase alternating current motor; the positive electrode of the battery pack BAT is also connected to the dc input port E1 through the third switch S3 and the fourth switch S4; the midpoint of each of the three-phase arms of the second drive module IPU2 is connected to the three-phase coil of the second motor V2 through the fifth switch S5, the sixth switch S6, and the seventh switch S7, respectively, and the midpoint of each arm is a connection point of the drain and the source of the two power tubes connected in series.

In this embodiment, the three-phase bridge arm of the first driving module IPU1 includes a first power tube Q1, a second power tube Q2, a third power tube Q3, a fourth power tube Q4, a fifth power tube Q5, and a sixth power tube Q6; the three-phase bridge arm of the second drive module IPU2 includes a seventh power tube Q7, an eighth power tube Q8, a ninth power tube Q9, a tenth power tube Q10, an eleventh power tube Q11, and a twelfth power tube Q12. The first power tube Q1, the third power tube Q3 and the fifth power tube Q5 have a first common drain end, and the second power tube Q2, the fourth power tube Q4 and the sixth power tube Q6 have a first common source end; the seventh power transistor Q7, the ninth power transistor Q9, and the eleventh power transistor Q11 have a second common drain terminal, and the eighth power transistor Q8, the tenth power transistor Q10, and the twelfth power transistor Q12 have a second common source terminal, where the first common drain terminal may be a first sink terminal, and the first common source terminal may be a second sink terminal.

The source of the first power tube Q1 is connected to the drain of the second power tube Q2 and then connected to the first phase coil of the first motor V1, the source of the third power tube Q3 is connected to the drain of the fourth power tube Q4 and then connected to the second phase coil of the first motor V1, and the source of the fifth power tube Q5 is connected to the drain of the sixth power tube Q6 and then connected to the third phase coil of the first motor V1. The source of the seventh power transistor Q7 and the drain of the eighth power transistor Q8 are connected in series with the first inductor L1 and then connected to the first phase interface of the ac charging port E2, the source of the ninth power transistor Q9 and the drain of the tenth power transistor Q10 are connected in series with the second inductor L2 and then connected to the second phase interface of the ac input port E2, and the source of the eleventh power transistor Q10 and the drain of the twelfth power transistor Q12 are connected in series with the third inductor L3 and then connected to the third phase interface of the ac input port E2. In this embodiment, the conduction states of the power transistors in the first driving module IPU1 and the second driving module IPU2 can be controlled by PWM (Pulse Width Modulation), so as to realize the functions of different mode circuits.

In this embodiment, when the plurality of switches are in different on/off states, the electric vehicle electrical integrated device is switched to the OBC charging circuit, the fast charging/boosting circuit, and the ac/dc V2V circuit.

The following describes technical solutions of circuits in different operating modes of this embodiment with reference to on/off states of switches in the switch module.

Fig. 2 is a circuit diagram of an OBC charging circuit according to an embodiment of the present application.

Referring to fig. 2, when the battery pack BAT is charged slowly, the first switch S1 and the third switch S3 are controlled to be closed, and the second switch S2, the fourth switch S4, the fifth switch S5, the sixth switch S6 and the seventh switch S7 are controlled to be opened, at which time the electric vehicle electric integrated device is switched to the OBC charging circuit. When electric automobile electrical integrated device is switched into OBC charging circuit, OBC charging circuit can be for battery package BAT charges after changing into DC power supply with the alternating current power supply of filling electric pile output among the correlation technique.

The OBC charging circuit is provided with a PFC circuit comprising a second driving module IPU1 and a Buck circuit comprising a first driving module IPU1, the PFC circuit comprises an inductance module connected to the input end of the second driving module IPU2 and an alternating current input port E2, the output end of the PFC circuit is connected with the input end of the Buck circuit, and the Buck circuit is used for adjusting the voltage output by the PFC circuit to be adaptive to the charging voltage of the battery pack BAT.

In one implementation, the inductance module includes a first inductance L1, a second inductance L2, and a third inductance L3 connected in series between the three-phase interface of the ac input port E2 and the input end of the second drive module IPU2, and a first capacitance C1 connected in parallel to the output end of the second drive module IPU 2; the Buck circuit comprises a first motor V1 connected to the output end of the first drive module IPU1 and a second capacitor C2 connected in parallel to the first motor V1, and two ends of the second capacitor C2 are connected to the positive electrode and the negative electrode of the battery pack BAT respectively.

The solid arrows in fig. 2 indicate the current flow direction when the first power tube Q1, the third power tube Q3 and the fifth power tube Q5 are turned on, the three-phase arm of the second drive module IPU2 rectifies the ac power input from the ac input port E2 to form a dc voltage across the first capacitor C1, the dc voltage across the first capacitor C1 charges the battery pack BAT and the inductor formed by the three-phase coil winding in the first motor V1, the dashed arrows indicate the current flow direction when the first power tube Q1, the third power tube Q3 and the fifth power tube Q5 are turned off, the inductor formed by the three-phase coil winding in the first motor V1 is in an energy release state, the parasitic body diodes of the second power tube Q2, the fourth power tube Q4 and the sixth power tube Q6 function as follow current tubes, the current keeps the original direction, and the battery is charged by the continuous inductor formed by the three-phase coil winding in the first motor V1, with such a circuit configuration, the BUCK circuit can reduce the voltage of the high voltage formed across the first capacitor C1 by the former-stage PFC circuit through the inductance formed by the three-phase coil winding in the first motor V1, so as to adjust the high voltage to the charging voltage required by the battery pack BAT. The OBC charging circuit of this embodiment can improve the output power of the vehicle-mounted charger, for example, the output power of the vehicle-mounted charger can be improved to 11KW to 150KW at the level of 7KW or 11KW of the related art, so that the high-voltage battery pack can be charged or fully charged more effectively in a slow charging state.

Fig. 3 is a circuit diagram of a fast charge/boost circuit according to an embodiment of the present application.

Referring to fig. 3, when the battery pack BAT is rapidly charged, the first switch S1, the second switch S2, and the fourth switch S4 are controlled to be closed, and the third switch S3, the fifth switch S5, the sixth switch S6, and the seventh switch S7 are controlled to be opened, at which time the electric vehicle electric integration device is switched to the rapid charging boost circuit.

After switching into quick charge boost circuit, can charge for battery package BAT after stepping up the direct current power supply voltage of filling electric pile output among the correlation technique. The fast charging and boosting circuit comprises a Boost boosting circuit with a first driving module IPU1, and the Boost boosting circuit is used for boosting the power supply voltage input by the direct current charging port E1 and then charging the battery pack BAT. In one implementation, the Boost voltage Boost circuit includes a second capacitor C2 connected in parallel to the dc input port E1, a first motor V1 connected in parallel to the second capacitor C2, and a first capacitor C1 connected in parallel to the first drive module IPU1, and two ends of the first capacitor C1 are connected to the positive electrode and the negative electrode of the battery pack BAT, respectively. The Boost circuit multiplexes an inductor in the first motor V1 as a Boost inductor, boosts the voltage of the DC power input from the DC input port E1, and charges the battery pack BAT through the second switch S2. When the boost circuit that fills in this embodiment avoids filling electric pile direct current output among the correlation technique, because output voltage is not enough to lead to the defect that high-voltage platform battery package can not be full of, also avoided among the correlation technique to lead to the higher defect of cost at the boost equipment that fills the return circuit increase soon, the inductance in multiplexing first motor V1 has been as the inductance that steps up, the cost is reduced.

The solid arrows in fig. 3 indicate the current flowing when the second power transistor Q2, the fourth power transistor Q4, and the sixth power transistor Q6 are turned on, and at this time, the dc power source output from the dc input port E1 charges the inductance formed by the three-phase coil winding in the first motor V1. The dashed arrows indicate the current flowing direction when the second power transistor Q2, the fourth power transistor Q4, and the sixth power transistor Q6 are turned off, at this time, the diodes in the parasitic body of the first power transistor Q1, the third power transistor Q3, and the fifth power transistor Q5 serve as a follow current transistor, the inductor formed by the three-phase coil winding in the first motor V1 releases energy, and the energy charges the battery pack BAT through the second switch S2.

Fig. 4 is a circuit diagram of a V2V circuit according to an embodiment of the present application.

Referring to fig. 4, when the battery pack of this embodiment needs to be charged externally, that is, when the V2V function is implemented, the first switch S1, the second switch S2, and the fourth switch S4 may be controlled to be closed, and the third switch S3, the fifth switch S5, the sixth switch S6, and the seventh switch S7 may be controlled to be opened, at which time the electric vehicle electric integrated device is switched to the dc V2V circuit. This direct current V2V circuit can be Buck circuit, and Buck circuit multiplexing three-phase coil winding in first motor V1 forms stable high voltage at second electric capacity C2 both ends as step-down inductance, adjusts to direct current power supply back and exports from direct current input port E1 to charge for external consumer.

It can be seen that the V2V circuit of this embodiment also multiplexes the three-phase coil winding in the first motor V1 as a step-down inductor, which further reduces cost.

It should be noted that the dc input port E1 of this embodiment may be used for dc input in the fast charging and boosting circuit, and may also be used for dc output in the V2V circuit, so that the dc input port E1 is multiplexed, the circuit structure is simplified, and the cost is reduced.

The V2V circuit of this embodiment includes a first driving module IPU1 and a first capacitor C1 connected in parallel to the battery pack BAT, and the first driving module IPU1 is connected in series with the first motor V1 and then connected in parallel with the second capacitor C2 and then connected to the dc input port E1. In fig. 4, solid arrows indicate current flowing directions when the first power tube Q1, the third power tube Q3, and the fifth power tube Q5 are turned on, and at this time, the battery pack BAT is in an external discharge state, and dashed arrows indicate that when the first power tube Q1, the third power tube Q3, and the fifth power tube Q5 are turned off, since the three-phase coil winding in the first motor V1 is used as a step-down inductor, and the parasitic body diodes of the second power tube Q2, the fourth power tube Q4, and the sixth power tube Q6 are used as a follow current tube, current can be kept in the original direction, and electric quantity is continuously output to the outside. Such a circuit configuration can increase the output power of V2V, for example, increase the output power of V2V from the current 7KW or 11KW level to 11KW to 150KW, and can more effectively charge the high-power electric equipment.

In the three-phase bridge arm of the first drive module IPU1, the on and off states of the second power tube Q2, the fourth power tube Q4, and the sixth power tube Q6 are complementary to the first power tube Q1, the third power tube Q3, and the fifth power tube Q5, that is, when the second power tube Q2, the fourth power tube Q4, and the sixth power tube Q6 are on, the first power tube Q1, the third power tube Q3, and the fifth power tube Q5 are off; alternatively, when the second power transistor Q2, the fourth power transistor Q4 and the sixth power transistor Q6 are turned off, the first power transistor Q1, the third power transistor Q3 and the fifth power transistor Q5 are turned on, that is, the three-phase bridge arm of the first driving module IPU1 does not form the bridge arm through mode, because the parasitic body diodes of the second power tube Q2, the fourth power tube Q4 and the sixth power tube Q6 can not be conducted, the body diodes can be conducted in a current conversion manner, and after the arrangement, by controlling different on-off modes of power tubes in the first drive module IPU1, a three-phase coil winding in the first motor V1 is multiplexed as an inductor, and the three-phase coil winding in the first motor V1 is respectively used as a buck inductor, a boost inductor and a buck inductor in an OBC charging circuit, a fast charging and boosting circuit and a V2V circuit, so that the circuit structure is simplified, original circuit elements are multiplexed to a greater extent, and the functions of circuits in different modes are realized.

Fig. 5 is a circuit diagram of an OBC charging circuit according to another embodiment of the present application.

Referring to fig. 5, in another embodiment, the apparatus further includes an isolation rectification circuit a connected to the first driver module IPU1, an input end of the isolation rectification circuit a is connected to an output end of the first driver module IPU, an output end of the isolation rectification circuit a is connected to the battery pack BAT, and the isolation rectification circuit a is configured to isolate and rectify a voltage output by the previous stage PFC circuit and then charge the battery pack BAT when the circuit is switched to the OBC charging circuit.

The isolation rectification circuit A comprises an isolation module U and a rectification module, the isolation module comprises three transformers connected with the output end of the first drive module IPU1, and the input ends of the three transformers are respectively connected with a fourth capacitor C4, a fifth capacitor C5 and a sixth capacitor C6 in series and then connected with a three-phase bridge arm of the first drive module IPU 1. The rectifying module comprises a three-phase rectifying bridge formed by diodes D1, D2, D3, D4, D5 and D6, the output ends of three transformers are respectively connected to the three-phase rectifying bridge, the output end of the three-phase rectifying bridge is connected with a third capacitor C3 in parallel, one end of the third capacitor C3 is connected with an inductor in series and then connected to the positive electrode of the battery pack BAT, and the other end of the third capacitor C3 is connected to the negative electrode of the battery pack BAT.

In this embodiment, on the basis of the switch module in the embodiment shown in fig. 1 to 4, an eighth switch S8, a ninth switch S9, a tenth switch S10, an eleventh switch S11, a twelfth switch S12, a thirteenth switch S13 and a fourteenth switch S14 are added. The middle point of each of the three-phase bridge arms of the first drive module IPU1 is connected to the input end of the isolation rectification circuit a through an eighth switch S8, a ninth switch S9 and a tenth switch S10; the middle point of each of the three-phase legs of the first drive module IPU1 is connected to the three-phase coil winding of the first motor V1 through an eleventh switch S11, a twelfth switch S12, and a thirteenth switch S13, respectively; the positive electrode of the battery pack BAT is connected to the common drain terminal of the three-phase arm of the first drive module IPU1 through the second switch S2, and the negative electrode of the battery pack BAT is connected to the second bus terminal of the three-phase arm of the first drive module IPU1 through the fourteenth switch S14.

When the eighth switch S8, the ninth switch S9, and the tenth switch S10 are controlled to be closed while the first switch S1, the second switch S2, the third switch S3, the fourth switch S4, the fifth switch S5, the sixth switch S6, the seventh switch S7, the eleventh switch S11, the twelfth switch S12, the thirteenth switch S13, and the fourteenth switch S14 are controlled to be open, the circuit is switched to the OBC charging circuit. In the OBC charging circuit, an ac power input from the ac input port E2 is rectified by the three-phase arm of the second driving module IPU2 to form a stable HV voltage across the first capacitor C1, which is then provided to the subsequent circuit. When the three-phase bridge arm of the first driving module IPU is controlled to be alternately opened, alternating current is generated on a transformer coil of the isolation module U to form an alternating magnetic field, energy is transmitted to a secondary coil of a transformer of the isolation module U through a magnetic core, and is rectified by rectifier diodes D1, D2, D3, D4, D5 and D6 to finally form a stable direct-current high-voltage power supply to charge the battery pack BAT, the circuit structure not only can fully charge the battery pack of the high-voltage platform by utilizing the charging pile in the related technology when the OBC is charged, moreover, the isolation rectification circuit can realize the electrical isolation in the charging process, avoid the electrostatic interference between the circuits at the two sides of the isolation module U, therefore, the charging safety of the electric automobile is improved, and meanwhile, the three-phase bridge arm of the first driving module IPU1 is multiplexed, so that the circuit structure is simplified, and the purposes of reducing the size and the cost are achieved.

Fig. 6 is a circuit diagram of a fast charge boost circuit according to another embodiment of the present application.

Referring to fig. 6, after the first switch S1, the third switch S3, the eighth switch S8, the ninth switch S9 and the tenth switch S10 are controlled to be opened, and the eleventh switch S11, the twelfth switch S12 and the thirteenth switch S13 are controlled to be closed, at this time, the connection of the isolation rectification circuit a is cut off by the eighth switch S8, the ninth switch S9 and the tenth switch S10, and the circuit is switched to the fast charge and boost circuit, and the description of the fast charge and boost circuit can refer to the description of fig. 3, and will not be repeated herein.

Fig. 7 is a circuit diagram of a V2V circuit according to another embodiment of the present application.

Referring to fig. 7, after the third switch S3, the eighth switch S8, the ninth switch S9 and the tenth switch S10 are controlled to be opened, and the first switch S1, the second switch S2, the eleventh switch S11, the twelfth switch S12 and the thirteenth switch S13 are controlled to be closed, the connection of the isolation rectification circuit a is cut off by the eighth switch S8, the ninth switch S9 and the tenth switch S10, and the circuit is switched to the V2V circuit, and the description of the V2V circuit can refer to the description of fig. 4, and will not be repeated here.

In this embodiment, the isolation rectification circuit a is mainly used in the OBC charging mode, and in the fast charging boost mode and the V2V mode, the eighth switch S8, the ninth switch S9, and the tenth switch S10 may be turned off to turn off the isolation rectification circuit a.

By combining the above embodiments, it can be found that, in the scheme of this embodiment, by setting the plurality of switches of the switch module to different connection modes and switching the plurality of switches to different on-off modes, the three-phase bridge arms of the first drive module IPU1 and the second drive module IPU2 can be integrated and multiplexed, so that different circuits, such as an OBC charging circuit, a fast charge and boost circuit, and a V2V circuit, can be respectively formed. By adjusting the driving logic of each power tube in the first driving module IPU1, different working modes can be flexibly switched and selected according to actual use requirements, and this embodiment performs an optimized design on two electrical integration devices of the four-wheel drive electric vehicle, thereby improving the integration level of the circuit, effectively optimizing the spatial arrangement of the whole vehicle as a whole, and reducing the cost of the whole vehicle.

The above embodiments describe an electric integrated device of an electric vehicle provided by the present application, and accordingly, the present application also provides an electric vehicle including the electric integrated device of an electric vehicle as shown in fig. 1 to fig. 4.

The electric integrated device of the electric automobile of the embodiment comprises a direct current input port E1 and an alternating current input port E2, which are used for charging a battery pack BAT of the electric automobile through a direct current power supply and an alternating current power supply respectively; the first drive module IPU1 and the second drive module IPU2 are used for driving a first motor V1 and a second motor V2 of the electric automobile respectively; the electric automobile electric integrated device further comprises a switch module connected with the first drive module IPU1 and the second drive module IPU2, and the switch module is used for switching the electric automobile electric integrated device into different working modes according to different on-off states. The scheme of this embodiment, two motor drive that can make full use of four-wheel drive electric automobile, with the drive circuit integration reconfiguration of two motor drive, make electric integrated device can switch to different mode's circuit respectively under the condition of difference, and then realize multiple different functions, not only avoided the quick electric pile of filling among the correlation technique to be difficult to the electric automobile that is the high-voltage battery framework charge or be full of the problem of electricity, can reduce whole car cost simultaneously.

The above embodiment introduces an electric automobile and an electric integrated device provided by the present application, and correspondingly, the present application further provides an electric integration method, which can be implemented based on the electric integrated device of the above embodiment.

Fig. 8 is a schematic diagram illustrating an electric vehicle electrical integration method according to an embodiment of the present application.

Referring to fig. 8, the scheme of the present embodiment includes:

step 101, acquiring control information of a switch module in an electrical integrated device; the electric integrated device comprises a direct current input port, an alternating current input port, a first driving module and a second driving module.

In this step, the control information of the switch module may be control information in which a plurality of switches are combined to be switched on and off differently, and the control information may be acquired according to an external trigger condition, where the external trigger condition includes a control instruction sent by the vehicle controller or a voltage value corresponding to the charging pile or the battery pack.

And step 102, controlling the switch module to be in different on-off states according to the control information of the switch module, and switching the electrical integrated device into circuits with different working modes through the different on-off states, wherein the circuits with different working modes comprise an OBC charging circuit, a quick charging and boosting circuit and a V2V circuit.

In this step, after the control information of the switch module is acquired, the plurality of switches of the switch module can be controlled to be in different on-off states, the plurality of switches form different on-off combinations according to the different on-off states, the different on-off combinations correspond to different working modes of the electrical integration device, and the electrical integration device is switched to the different working modes through the different on-off combinations of the plurality of switches. For example, the electric integrated device is switched into an OBC charging mode, a fast charging and boosting mode and a V2V mode through different on-off combinations of a plurality of switches, wherein the OBC charging mode comprises an OBC charging circuit, the fast charging and boosting mode comprises a fast charging and boosting circuit, and the V2V circuit comprises the V2V circuit. The detailed description of the OBC charging circuit, the fast charge boost circuit and the V2V circuit can refer to the description in the electrical integrated device, and the detailed description thereof is omitted here.

The method provided by the embodiment comprises the steps of acquiring control information of a switch module in an electrical integrated device; the electric integrated device comprises a direct current input port, an alternating current input port, a first driving module and a second driving module; and controlling the switch module to be in different on-off states according to the control information of the switch module, and switching the electrical integration device into different working modes according to the different on-off states. After the electric integrated device is processed in the way, the electric integrated device can be respectively switched to circuits of different working modes under different conditions, different functions can be further realized, the problem that a quick charging pile in the related technology is difficult to charge or fully charge an electric automobile with a high-voltage battery framework is avoided, multiple functions can be realized under the condition that extra high-power equipment is not added, and the cost of the electric automobile is reduced.

Step 201, acquiring control information of a switch module in an electrical integrated device; the electric integrated device comprises a direct current input port, an alternating current input port, a first driving module and a second driving module.

In this step, the control information of the switch module may be control information of different on-off combinations of the plurality of switches, and the control information may be acquired according to an external trigger condition, where the external trigger condition includes a control instruction sent by the vehicle controller or a voltage value corresponding to the charging pile.

Step 202, controlling the switch module to be in different on-off states according to the control information of the switch module; and controlling the three-phase bridge arm of the first drive module IPU1 and the three-phase bridge arm of the second drive module IPU2 to be in different conduction states according to different on-off states, and switching the electric integrated device into an OBC charging mode, a fast charging and boosting mode or a V2V mode according to the different conduction states.

In this step, the first drive module IPU1 and the second drive module IPU2 include a three-phase bridge arm formed by a plurality of power tubes, and the circuit structures of the three-phase bridge arm in the first drive module IPU1 and the second drive module IPU2 may refer to the description of the above embodiment for the electrical integrated device, and are not described herein again. In the circuits with different operation modes, the conduction states of the power tubes in the three-phase bridge arms of the first drive module IPU1 and the second drive module IPU2D are controlled by a control device, such as PWM (Pulse Width Modulation), and the electric integrated device realizes corresponding circuits with different operation modes through different conduction states.

And 203, forming a PFC circuit and a Buck circuit in an OBC charging mode according to the first on-off state of the switch module and the first on-state of the three-phase bridge arm, wherein the Buck circuit is used for adjusting the voltage output by the PFC circuit to be adapted to the charging voltage of the battery pack.

Referring to fig. 2, in this step, when the switch module is in the first on-off state, the first switch S1 and the third switch S2 are closed, and the second switch S2, the fourth switch S4, the fifth switch S5, the sixth switch S6 and the seventh switch S7 are opened. When the three-phase arm of the first drive module IPU1 and the three-phase arm of the second drive module IPU2 are in the first on state, a PFC circuit and a Buck circuit in an OBC charging mode are formed, solid arrows indicate current flowing directions when the first power tube Q1, the third power tube Q3 and the fifth power tube Q5 are turned on, the three-phase arm of the second drive module IPU2 rectifies an ac power input from the ac input port E2, a dc voltage is formed at both ends of the first capacitor C1, an inductance formed by the battery pack BAT and the three-phase coil winding in the first motor V1 is charged by the dc voltage at both ends of the first capacitor C1, dashed arrows indicate current flowing directions when the first power tube Q1, the third power tube Q3 and the fifth power tube Q5 are turned off, at this time, the inductance formed by the three-phase coil winding in the first motor V1 is in an energy release state, and the second power tube Q2, the fourth power tube Q4 and the sixth power tube Q6 function as parasitic diodes 6, the current keeps original direction, and the inductance that forms through the three-phase coil winding in the first motor V1 lasts to battery package BAT charges, through such processing, can improve the output of on-vehicle machine that charges, can for example improve to the output of 11KW ~ 150KW at the 7KW of correlation technique, 11KW rank for can be more effectively when slowly charging the state for high-voltage battery package charges or full charge.

And 204, forming an isolation rectification circuit in the OBC charging mode according to the second on-off state of the switch module and the second conduction state of the three-phase bridge arm, wherein the isolation rectification circuit is used for electrical isolation of the OBC charging mode.

Referring to fig. 5, in this step, when the switch module is in the second on-off state, the eighth switch S8, the ninth switch S9, and the tenth switch S10 are closed, and the first switch S1, the second switch S2, the third switch S3, the fourth switch S4, the fifth switch S5, the sixth switch S6, the seventh switch S7, the eleventh switch S11, the twelfth switch S12, the thirteenth switch S13, and the fourteenth switch S14 are opened. When the three-phase bridge arm of the first drive module IPU1 and the three-phase bridge arm of the second drive module IPU2 are in the second conduction state, an isolation rectification circuit in the OBC charging mode is formed, the isolation rectification circuit is used for electrical isolation of the OBC charging mode, the three-phase bridge arm of the first drive module IPU is in an alternate opening state at the moment, the three-phase bridge arm of the second drive module IPU2 is in a rectification state, the electrical integration device is switched to the OBC charging mode at the moment, and the isolation rectification circuit is used for electrical isolation of the OBC charging mode, so that the OBC charging safety can be improved.

And step 205, forming a Boost circuit in a fast charging and boosting mode according to the third on-off state of the switch module and the third conduction state of the three-phase bridge arm, wherein the Boost circuit is used for boosting the voltage input by the direct current input port and then charging the battery pack.

Referring to fig. 3, in this step, when the switch module is in the third on-off state, the first switch S1, the second switch S2, and the fourth switch S4 are closed, and the third switch S3, the fifth switch S5, the sixth switch S6, and the seventh switch S7 are opened. When the three-phase bridge arm of the first drive module IPU1 and the three-phase bridge arm of the second drive module IPU2 are in the third conduction state, a Boost circuit in a fast charge and Boost mode can be formed, and the Boost circuit is used for boosting the voltage input by the direct current input port and then charging the battery pack. The solid arrows indicate the current flowing when the second power transistor Q2, the fourth power transistor Q4, and the sixth power transistor Q6 are turned on, and at this time, the dc power output from the dc input port E1 charges the inductance formed by the three-phase coil winding in the first motor V1. The dashed arrows indicate the current flowing direction when the second power transistor Q2, the fourth power transistor Q4, and the sixth power transistor Q6 are turned off, at this time, the diodes in the parasitic body of the first power transistor Q1, the third power transistor Q3, and the fifth power transistor Q5 serve as a follow current transistor, the inductor formed by the three-phase coil winding in the first motor V1 releases energy, and the energy charges the battery pack BAT through the second switch S2.

And step 206, forming a Buck circuit in a V2V mode according to the fourth on-off state of the switch module and the fourth on-state of the three-phase bridge arm, wherein the Buck circuit is used for outputting electric quantity to the outside through the direct current input port.

Referring to fig. 4, in this step, when the switch module is in the fourth on-off state, the first switch S1, the second switch S2, and the fourth switch S4 are closed, and the third switch S3, the fifth switch S5, the sixth switch S6, and the seventh switch S7 are opened. When the three-phase bridge arm of the first drive module IPU1 and the three-phase bridge arm of the second drive module IPU2 are in the fourth conduction state, a Buck voltage reduction circuit in the V2V mode is formed, and the Buck voltage reduction circuit is used for outputting electric quantity to the outside through the direct current input port. Solid arrows indicate current flowing directions when the first power tube Q1, the third power tube Q3 and the fifth power tube Q5 are turned on, at this time, the battery pack BAT is in an external discharge state, dashed arrows indicate that when the first power tube Q1, the third power tube Q3 and the fifth power tube Q5 are turned off, since a three-phase coil winding in the first motor V1 is used as a step-down inductor, and parasitic body diodes in the second power tube Q2, the fourth power tube Q4 and the sixth power tube Q6 are used as a follow current tube, current can keep the original direction and continuously output electric quantity to the outside. The circuit structure can improve the power output by V2V, for example, the output power of V2V is improved from the prior level of 7KW and 11KW to 11 KW-150 KW.

It can be found that in the solution of this embodiment, the three-phase bridge arms of the first drive module IPU1 and the second drive module IPU2 can be integrated and multiplexed to form circuits with different operation modes, such as an OBC charging circuit, a fast charging and boosting circuit, and a V2V circuit. Different working modes can be flexibly switched and selected according to actual use requirements, the two driving circuits of the four-wheel drive electric automobile are optimally designed, the integration level of the circuits is improved, the whole automobile space arrangement is effectively optimized on the whole, and the whole automobile cost is reduced.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An electric automobile electrical integrated device, characterized by comprising:

the device is still including connecting in the switch module of first drive module and second drive module, the switch module is used for will at different on-off state the circuit that electric integrated device switched into different mode, wherein, the circuit of different mode includes OBC charging circuit, fast charge boost circuit and V2V circuit.

2. The electric vehicle electrical integration device according to claim 1, wherein:

different working modes of the electric integrated device comprise an OBC charging mode, a quick charging and boosting mode and a V2V mode;

when the switch module is in different on-off states, the electrical integration device is switched to the OBC charging mode, the fast charging and boosting mode or the V2V mode;

3. The electric vehicle electrical integration device according to claim 2, wherein:

4. The electric vehicle electrical integration device according to claim 2, wherein:

the fast charging and boosting circuit is provided with a Boost circuit comprising the first driving module, the input end of the Boost circuit is connected with the direct current input port, the output end of the Boost circuit is connected with the positive electrode and the negative electrode of the battery pack, and the Boost circuit is used for charging the battery pack after boosting the voltage input by the direct current input port; or

The V2V circuit has and includes the Buck step-down circuit of first drive module, Buck step-down circuit's input is connected the positive negative pole of battery package, Buck step-down circuit's output is connected direct current input port, Buck step-down circuit is used for passing through direct current input port is to outer output electric quantity.

5. The electric vehicle electrical integration device according to claim 3, wherein:

the switch module at least comprises a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch and a seventh switch;

6. The electric vehicle electrical integration device according to claim 5, wherein:

the switch module further comprises an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch and a fourteenth switch;

the middle point of each bridge arm of the three-phase bridge arms of the first driving module is connected to the input end of the isolation rectification circuit through the eighth switch, the ninth switch and the tenth switch respectively;

the middle point of each of the three-phase bridge arms of the first driving module is connected to the three-phase coil of the first motor through the eleventh switch, the twelfth switch and the thirteenth switch respectively;

7. The electric vehicle electrical integration device according to claim 6, wherein:

the first switch and the third switch are closed, and simultaneously when the second switch, the fourth switch, the fifth switch, the sixth switch and the seventh switch are opened, the electric integrated device is switched to the OBC charging circuit; or

The eighth switch, the ninth switch, and the tenth switch are closed, and when the first switch, the second switch, the third switch, the fourth switch, the fifth switch, the sixth switch, the seventh switch, the eleventh switch, the twelfth switch, the thirteenth switch, and the fourteenth switch are open, the electrical integration device is switched to the OBC charging circuit.

8. The electrical integration apparatus of claim 5, wherein:

the first switch, the second switch and the fourth switch are closed, and when the third switch, the fifth switch, the sixth switch and the seventh switch are opened, the electric integrated device is switched to the quick charging and boosting circuit; or

The first switch, the second switch, and the fourth switch are closed, and the third switch, the fifth switch, the sixth switch, and the seventh switch are open, the electrically integrated device is switched to the V2V circuit.

9. The electric vehicle electrical integration device according to claim 3, wherein:

the isolation rectification circuit comprises an isolation module connected with the output end of the first driving module and a rectification module connected with the output end of the isolation module.

10. An electric vehicle characterized by comprising the electric vehicle electrical integration device according to any one of claims 1 to 9.

11. An electrical integration method, comprising:

the method comprises the steps of obtaining control information of a switch module in an electrical integrated device, wherein the electrical integrated device comprises a direct current input port, an alternating current input port, a first driving module and a second driving module;

12. The method according to claim 11, wherein the circuit for controlling the switch module to be in different on-off states according to the control information of the switch module, and switching the electrical integrated device into different operation modes according to the different on-off states comprises:

13. The method according to claim 12, wherein the controlling the switch module to be in different on-off states according to the control information of the switch module, and switching the electrical integration device to be in an OBC charging mode, a fast charging and boosting mode or a V2V mode according to the different on-off states comprises:

controlling the switch module to be in different on-off states according to the control information of the switch module; and controlling the three-phase bridge arm of the first driving module and the three-phase bridge arm of the second driving module to be in different conduction states according to different on-off states of the switch module, and switching the electrical integration device into the OBC charging mode, the fast charging and boosting mode or the V2V mode according to different conduction states.

14. The method of claim 13, wherein:

forming a PFC circuit and a Buck circuit in the OBC charging mode according to a first on-off state of the switch module and a first on-off state of the three-phase bridge arm, wherein the Buck circuit is used for adjusting the voltage output by the PFC circuit to be adapted to the charging voltage of a battery pack; or

15. The method of claim 13, wherein:

a Boost circuit in the fast charge and Boost mode is formed according to a third on-off state of the switch module and a third conduction state of the three-phase bridge arm, and the Boost circuit is used for boosting the voltage input by the direct current input port and then charging the battery pack; or