Single-electric-drive high-voltage framework and vehicle

Abstract

According to the single-electric-drive high-voltage framework and the vehicle, a main control circuit controls the on-off states of a main positive switching circuit, a main negative switching circuit, a winding switching circuit and a bridge type inverter circuit, so that a high-voltage battery supplies power to the bridge type inverter circuit through the main positive switching circuit and the main negative switching circuit; and the bridge type inverter circuit outputs corresponding current to a motor winding so as to drive the motor to work. Moreover, the main control circuit controls the on-off states of the main positive switching circuit, the main negative switching circuit, the winding switching circuit and the bridge type inverter circuit, so that an external high-voltage load and a motor winding can be reused to enable an external charging circuit to select a corresponding charging mode to charge a high-voltage battery, and the motor winding can be reused to realize the self-heating function of the battery. Therefore, various functional requirements of the vehicle are met by controlling the on-off state of each switching circuit, and the problem that the function is single due to the fact that the battery charging circuit and the motor driving circuit are independent in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a single electric drive high-voltage architecture and a vehicle. BACKGROUND

[0002] In an electric vehicle, a motor is used as a driving device to drive vehicle movement. A power battery pack in the electric vehicle can provide power for the motor. Therefore, in the electric vehicle, a battery charging circuit is needed to charge the power battery pack of the electric vehicle, and a motor driving circuit is used to drive the motor of the electric vehicle.

[0003] In the related art, the battery charging circuit and the motor driving circuit in the electric vehicle are separate, and the two circuits do not interfere with each other and are independent of each other. Not only does this require a more complex circuit structure, but it also has the problem of single function. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the present application provides a single electric drive high-voltage architecture and a vehicle, which aims to solve the problem of single function caused by the independent battery charging circuit and motor driving circuit in the related art.

[0005] The first aspect of the embodiment of the present application provides a single electric drive high-voltage architecture, which comprises a first battery, a second battery, a main positive switch circuit, a main negative switch circuit, a winding switch circuit, a bridge inverter circuit, a motor winding and a main control circuit.

[0006] The first battery and the second battery are connected in series to form a high-voltage battery, and the electric drive neutral line of the motor winding is connected to the common node of the first battery and the second battery through the winding switch circuit.

[0007] The positive electrode of the high-voltage battery is connected to the first end of the bridge inverter circuit through the main positive switch circuit, and the negative electrode of the high-voltage battery is connected to the second end of the bridge inverter circuit through the main negative switch circuit.

[0008] The working states of the main positive switch circuit, the main negative switch circuit, the winding switch circuit and the bridge inverter circuit are controlled by the main control circuit.

[0009] In the technical solution of the embodiment of the application, the working states of the main positive switch circuit, the main negative switch circuit, the winding switch circuit and the bridge inverter circuit are controlled by the master control circuit. The master control circuit can control the switching states of the main positive switch circuit, the main negative switch circuit, the winding switch circuit and the bridge inverter circuit, so that the high-voltage battery provides power to the bridge inverter circuit through the main positive switch circuit and the main negative switch circuit, and the bridge inverter circuit outputs corresponding current to the motor winding, thereby driving the motor to work. Moreover, the master control circuit controls the switching states of the main positive switch circuit, the main negative switch circuit, the winding switch circuit and the bridge inverter circuit, which can not only reuse the external high-voltage load and the motor winding to enable the external charging circuit to select a corresponding charging mode to charge the high-voltage battery, but also can reuse the motor winding to realize the self-heating function of the battery, thereby realizing various functional requirements of the vehicle by controlling the switching states of the respective switch circuits, and solving the problem of single function caused by the independent battery charging circuit and motor driving circuit in the related art.

[0010] In some embodiments, the single motor high-voltage architecture further includes: a direct-current charging circuit, a direct-charge positive switch circuit and a direct-charge negative switch circuit.

[0011] The positive electrode of the direct-current charging circuit is connected to the positive electrode of the high-voltage battery through the direct-charge positive switch circuit, and the negative electrode of the direct-current charging circuit is connected to the negative electrode of the high-voltage battery through the direct-charge negative switch circuit.

[0012] In the technical solution of the embodiment of the application, the positive electrode of the direct-current charging circuit is connected to the positive electrode of the high-voltage battery through the direct-charge positive switch circuit, and the negative electrode of the direct-current charging circuit is connected to the negative electrode of the high-voltage battery through the direct-charge negative switch circuit, which can realize charging of the high-voltage battery. Moreover, the master control circuit controls the switching states of the main positive switch circuit, the main negative switch circuit, the direct-charge positive switch circuit, the direct-charge negative switch circuit, the winding switch circuit and the bridge inverter circuit, which can realize charging of the high-voltage battery in the direct-current fast charging mode, can enable the direct-current charging circuit to select the current-boosting charging mode or the voltage-boosting charging mode to charge the high-voltage battery by reusing the motor winding, and can realize the self-heating function of the battery by reusing the motor winding, thereby realizing various functional requirements of the high-voltage battery of the vehicle by the master control circuit controlling the switching states of the respective switch circuits, and solving the problem of single function caused by the independent battery charging circuit and motor driving circuit in the related art.

[0013] In some embodiments, the master control circuit is configured to, when working in the direct-current fast charging mode, control the main positive switch circuit, the main negative switch circuit and the winding switch circuit to be turned off, and control the direct-current charging circuit to charge the high-voltage battery through the direct-charge positive switch circuit and the direct-charge negative switch circuit.

[0014] In the technical solution of the embodiment of the application, the main control circuit controls the main positive switch circuit, the main negative switch circuit and the winding switch circuit to be turned off, and controls the direct-current charging circuit to charge the high-voltage battery through the direct-charge positive switch circuit and the direct-charge negative switch circuit, so that the single motor drive high-voltage architecture can work in a direct-current fast charging mode, and the direct-current charging circuit can quickly charge the high-voltage battery.

[0015] In some embodiments, the single motor drive high-voltage architecture further comprises:

[0016] The anti-reverse circuit is connected between the motor winding neutral line and the main positive switch circuit, and is used to prevent the output current of the main positive switch circuit from flowing back to the motor winding.

[0017] In the technical solution of the embodiment of the application, the anti-reverse circuit is arranged between the motor winding neutral line and the main positive switch circuit, so that the freewheeling and discharging of the motor winding can be flexibly controlled, the motor winding can be reused during the charging of the high-voltage battery by the direct-current charging circuit, the current boosting charging function of the single motor drive high-voltage architecture is realized, the charging current of the direct-current charging circuit to the high-voltage battery is improved, and the charging capability of the single motor drive high-voltage architecture is enhanced. Moreover, since the motor winding is reused, the complexity and size of the single motor drive high-voltage architecture are reduced.

[0018] In some embodiments, the single motor drive high-voltage architecture further comprises:

[0019] The first switch circuit is connected between the bridge inverter circuit and the main positive switch circuit.

[0020] The second switch circuit is connected between the common node of the first switch circuit and the bridge inverter circuit and the positive electrode of the direct-current charging circuit.

[0021] The switching states of the first switch circuit and the second switch circuit are controlled by the main control circuit.

[0022] In the technical solution of the embodiment of the application, the first switch circuit and the second circuit are arranged between the direct-current charging circuit and the main positive switch circuit, and the anti-reverse circuit is arranged between the motor winding neutral line and the main positive switch circuit, so that the current path of the direct current output by the direct-current charging circuit can be flexibly controlled, the motor winding can be used for freewheeling and discharging in different current paths, and the motor winding can be reused during the charging of the high-voltage battery by the direct-current charging circuit. In this way, the current boosting charging function of the single motor drive high-voltage architecture can be realized, the charging current of the direct-current charging circuit to the high-voltage battery is improved, and the charging capability of the single motor drive high-voltage architecture is enhanced. Moreover, since the motor winding is reused, no additional inductor component needs to be arranged, the vehicle strategy is simplified, the charging strategy of the high-voltage battery is diversified, the complexity and size of the single motor drive high-voltage architecture are reduced, and the weight and cost of the vehicle are also reduced.

[0023] In some embodiments, the main control circuit is configured to control the motor winding to alternately operate in the freewheeling charging mode and the step-down discharging mode when operating in the boost charging mode.

[0024] In the technical solution of the embodiments of the present application, the current output by the direct current charging circuit is controlled to flow through the motor winding and then form a BUCK step-down circuit in series with an external charger (connected to the direct current charging circuit) to form a freewheeling charging mode. Then, the upper bridge arm of the bridge inverter circuit is controlled to be turned off, and the main control circuit controls the motor winding to alternately operate in the freewheeling charging mode and the step-down discharging mode. Thus, in the boost charging mode, the motor winding is reused by the direct current charging circuit to charge the high-voltage battery in the boost mode, thereby achieving multiple functional requirements of the high-voltage battery of the vehicle and solving the problem of single function caused by the independent battery charging circuit and motor driving circuit in the related art.

[0025] In some embodiments, when the main control circuit controls the motor winding to operate in the freewheeling charging mode, the first switch circuit, the main negative switch circuit, and the winding switch circuit are controlled to be turned off, and the direct current output by the direct current charging circuit is controlled to flow through the second switch circuit, the bridge inverter circuit, the motor winding, the anti-reverse circuit, the main positive switch circuit, the high-voltage battery, and the direct charging negative switch circuit to form a charging loop for freewheeling of the motor winding.

[0026] In the technical solution of the embodiments of the present application, the current output by the direct current charging circuit is controlled to flow through the second switch circuit, the bridge inverter circuit, the motor winding, the anti-reverse circuit, the main positive switch circuit, the high-voltage battery, and the direct charging negative switch circuit to form a charging loop. The charging loop includes an external charger (connected to the direct current charging circuit). In this way, a BUCK step-down circuit can be formed in series to form a freewheeling charging mode. Then, the upper bridge arm of the bridge inverter circuit is controlled to be turned off, and the main control circuit controls the motor winding to alternately operate in the freewheeling charging mode and the step-down discharging mode. Thus, in the boost charging mode, the motor winding is reused by the direct current charging circuit to charge the high-voltage battery in the boost mode, thereby achieving multiple functional requirements of the high-voltage battery of the vehicle and solving the problem of single function caused by the independent battery charging circuit and motor driving circuit in the related art.

[0027] In some embodiments, when the main control circuit controls the motor winding to operate in the step-down discharging mode, the first switch circuit, the second switch circuit, and the winding switch circuit are controlled to be turned off, and the motor winding is controlled to flow through the anti-reverse circuit, the main positive switch circuit, the high-voltage battery, the direct charging negative switch circuit, and the bridge inverter circuit to form a discharging loop for charging the high-voltage battery.

[0028] In the technical solution of the embodiment of the application, the current output by the direct-current charging circuit is made to continue to flow through the motor winding, and then, in series with the charger (connected with the direct-current charging circuit) externally connected, a BUCK step-down circuit is formed, a current-continuing charging condition is formed, then the upper bridge arm of the bridge inverter circuit is controlled to be turned off, the first switch circuit, the second switch circuit and the winding switch circuit are controlled to be turned off, and the motor winding is controlled to charge the high-voltage battery through the anti-reverse circuit, the main positive switch circuit, the high-voltage battery, the direct-charging negative switch circuit and the bridge inverter circuit to form a discharging loop. The main control circuit can control the motor winding to alternately work in the current-continuing charging condition and the step-down discharging condition, so that in the current-boosting charging mode, the motor winding is reused by the direct-current charging circuit to charge the high-voltage battery, multiple functional requirements of the high-voltage battery of the vehicle are realized, and the problem of single function caused by independent battery charging circuit and motor driving circuit in the related art is solved.

[0029] In some embodiments, the single-motor-drive high-voltage architecture further includes:

[0030] The third switch circuit is connected between the positive electrode of the direct-current charging circuit and the motor winding.

[0031] In the technical solution of the embodiment of the application, the third switch circuit is arranged between the positive electrode of the direct-current charging circuit and the motor winding, so as to provide a current path between the positive electrode of the direct-current charging circuit and the motor winding. The main control circuit can control the switching state of the third switch circuit, so that the motor winding is connected in series with the charger to form a BOOST step-up loop after current continuation, and a working condition of the step-up charging mode is provided for the single-motor-drive high-voltage architecture. In the step-up charging mode, the motor winding is reused by the direct-current charging circuit to charge the high-voltage battery, multiple functional requirements of the high-voltage battery of the vehicle are realized, and the problem of single function caused by independent battery charging circuit and motor driving circuit in the related art is solved.

[0032] In some embodiments, the main control circuit is configured to control the motor winding to alternately work in the step-up current-continuing condition and the step-up discharging condition when working in the step-up charging mode.

[0033] In the technical solution of the embodiment of the application, the third switch circuit is arranged between the positive electrode of the direct-current charging circuit and the electric drive neutral line of the motor winding, so as to provide a current path between the positive electrode of the direct-current charging circuit and the electric drive neutral line of the motor winding. The main control circuit can control the switching state of the third switch circuit, so that the motor winding is in series with the charger to form a BOOST boost circuit after the motor winding is in continuous current. When the single electric drive high-voltage architecture works in the boost charging mode, the main positive switch circuit, the main negative switch circuit, the anti-reverse circuit, the bridge inverter circuit and the motor winding are alternately controlled by the main control circuit to work in the boost continuous current condition and the boost discharge condition. In the boost charging mode, the motor winding is used to boost charge the high-voltage battery through the direct-current charging circuit, so as to realize multiple function requirements of the high-voltage battery of the vehicle, and solve the problem of single function caused by independent battery charging circuit and motor driving circuit in the related art.

[0034] In some embodiments, when the main control circuit controls the motor winding to work in the boost continuous current condition, the main control circuit controls the direct charging positive electrode switch circuit, the main positive switch circuit and the winding switch circuit to be turned off, and controls the direct current output by the direct-current charging circuit to pass through the third switch circuit, the motor winding, the bridge inverter circuit, the main negative switch circuit and the direct charging negative electrode switch circuit to form a charging circuit, so as to perform continuous current on the motor winding.

[0035] In the technical solution of the embodiment of the application, the third switch circuit is arranged between the positive electrode of the direct-current charging circuit and the electric drive neutral line of the motor winding, so as to provide a current path between the positive electrode of the direct-current charging circuit and the electric drive neutral line of the motor winding. The main control circuit can control the switching state of the third switch circuit, so that the motor winding is in series with the charger to form a BOOST boost circuit after the motor winding is in continuous current. When the single electric drive high-voltage architecture works in the boost charging mode, the main positive switch circuit, the main negative switch circuit, the anti-reverse circuit, the bridge inverter circuit and the motor winding are alternately controlled by the main control circuit to work in the boost continuous current condition and the boost discharge condition. In the boost charging mode, the motor winding is used to boost charge the high-voltage battery through the direct-current charging circuit, so as to realize multiple function requirements of the high-voltage battery of the vehicle, and solve the problem of single function caused by independent battery charging circuit and motor driving circuit in the related art.

[0036] In some embodiments, when the main control circuit controls the motor winding to work in the boost discharge condition, the main control circuit controls the direct charging positive electrode switch circuit, the main negative switch circuit and the winding switch circuit to be turned off, and controls the motor winding to pass through the bridge inverter circuit, the main positive switch circuit, the high-voltage battery, the direct charging negative electrode switch circuit, the direct-current charging circuit and the third switch circuit to form a discharge circuit, so as to charge the high-voltage battery.

[0037] In the technical solution of the embodiment of the application, the main control circuit controls the direct charging positive electrode switch circuit, the main negative electrode switch circuit and the winding switch circuit to be turned off, and controls the motor winding to work in a discharging loop composed of the bridge inverter circuit, the main positive electrode switch circuit, the high-voltage battery, the direct charging negative electrode switch circuit, the direct current charging circuit and the third switch circuit, so that the motor winding works in a boosting discharging working condition. The main control circuit controls the main positive electrode switch circuit, the main negative electrode switch circuit, the anti-reverse circuit, the bridge inverter circuit and the motor winding to alternately work in a boosting continuous current working condition and a boosting discharging working condition. In the boosting charging mode, the motor winding is reused to boost charge the high-voltage battery through the direct current charging circuit, multiple function requirements of the high-voltage battery of the vehicle are realized, and the problem of single function caused by the independent battery charging circuit and the motor driving circuit in the related art is solved.

[0038] In some embodiments, the main control circuit is configured to control the motor winding to alternately work in the self-heating continuous current working condition and the self-heating discharging working condition when working in the self-heating mode.

[0039] In the technical solution of the embodiment of the application, the main control circuit can control the first battery and the second battery to store energy and discharge energy with the motor winding through the bridge inverter circuit, the main positive electrode switch circuit, the main negative electrode switch circuit and the winding switch circuit. In the self-heating mode, the motor winding is reused to alternately work in the self-heating continuous current working condition and the self-heating discharging working condition, so that the self-heating function is realized by relying on the internal resistance of the first battery and the second battery, multiple function requirements of the high-voltage battery of the vehicle are realized, and the problem of single function caused by the independent battery charging circuit and the motor driving circuit in the related art is solved.

[0040] In some embodiments, when the main control circuit controls the motor winding to work in the self-heating continuous current working condition, the main control circuit controls the direct charging positive electrode switch circuit, the direct charging negative electrode switch circuit and the main negative electrode switch circuit to be turned off, and controls the direct current output by the first battery to form a charging loop composed of the main positive electrode switch circuit, the bridge inverter circuit, the motor winding and the winding switch circuit, so as to continuously flow the motor winding.

[0041] In the technical solution of the embodiment of the application, the main control circuit can control the first battery and the second battery to store and discharge energy with the motor winding by controlling the bridge inverter circuit, the main positive switch circuit, the main negative switch circuit and the winding switch circuit. In the self-heating mode, the motor winding is controlled to alternately work in the self-heating freewheeling condition and the self-heating discharging condition. When the main control circuit controls the motor winding to work in the self-heating discharging condition, the direct charging positive switch circuit, the direct charging negative switch circuit and the main positive switch circuit are controlled to be turned off, and the motor winding is controlled to form a discharging loop composed of the winding switch circuit, the second battery, the main negative switch circuit and the bridge inverter circuit to heat the second battery. Thus, the self-heating function is realized by relying on the internal resistance of the first battery and the second battery, and various functional requirements of the high-voltage battery of the vehicle are realized, thereby solving the problem of single function caused by the independent battery charging circuit and the motor driving circuit in the related art.

[0042] In some embodiments, when the main control circuit controls the motor winding to work in the self-heating discharging condition, the direct charging positive switch circuit, the direct charging negative switch circuit and the main positive switch circuit are controlled to be turned off, and the motor winding is controlled to form a discharging loop composed of the winding switch circuit, the second battery, the main negative switch circuit and the bridge inverter circuit to heat the second battery.

[0043] In the technical solution of the embodiment of the application, the main control circuit can control the first battery and the second battery to store and discharge energy with the motor winding by controlling the bridge inverter circuit, the main positive switch circuit, the main negative switch circuit and the winding switch circuit. In the self-heating mode, the motor winding is controlled to alternately work in the self-heating freewheeling condition and the self-heating discharging condition. When the main control circuit controls the motor winding to work in the self-heating discharging condition, the direct charging positive switch circuit, the direct charging negative switch circuit and the main positive switch circuit are controlled to be turned off, and the motor winding is controlled to form a discharging loop composed of the winding switch circuit, the second battery, the main negative switch circuit and the bridge inverter circuit to heat the second battery. Thus, the self-heating function is realized by relying on the internal resistance of the first battery and the second battery, and various functional requirements of the high-voltage battery of the vehicle are realized, thereby solving the problem of single function caused by the independent battery charging circuit and the motor driving circuit in the related art.

[0044] In some embodiments, the single motor drive high-voltage architecture further comprises:

[0045] The pre-charging switch circuit is connected in parallel with the main positive switch circuit.

[0046] In the technical solution of the embodiment of the application, the pre-charging switch circuit is connected in parallel with the main positive switch circuit, so that the high-voltage battery can be pre-charged by the pre-charging switch circuit before formal charging, thereby realizing various functional requirements of the high-voltage battery of the vehicle.

[0047] In some embodiments, the single motor drive high-voltage architecture further comprises:

[0048] The vehicle-mounted charging circuit is connected with the main positive switch circuit and the main negative switch circuit, and is used for charging the high-voltage battery under the control of the master control circuit.

[0049] In the technical solution of the embodiment of the application, the vehicle-mounted charging circuit is controlled by the master control circuit, and can charge the high-voltage battery through the main positive switch circuit and the main negative switch circuit, or can realize various functional requirements of the high-voltage battery of the vehicle by multiplexing the bridge inverter circuit and the motor winding through the vehicle-mounted charging circuit, thereby solving the problem of single function caused by the independent battery charging circuit and motor driving circuit in the related art.

[0050] The third aspect of the embodiment of the application further provides a vehicle, which comprises the single-motor high-voltage architecture according to any one of the above embodiments.

[0051] In the technical solution of the embodiment of the application, the vehicle comprises a high-voltage battery, and the switching states of the main positive switch circuit, the main negative switch circuit, the winding switch circuit and the bridge inverter circuit are controlled by the master control circuit, so that the high-voltage battery provides power to the bridge inverter circuit through the main positive switch circuit and the main negative switch circuit, and the bridge inverter circuit outputs corresponding current to the motor winding, thereby driving the motor to work. Moreover, the switching states of the main positive switch circuit, the main negative switch circuit, the winding switch circuit and the bridge inverter circuit are controlled by the master control circuit, so that the external charging circuit can select a corresponding charging mode to charge the high-voltage battery by multiplexing the external high-voltage load and the motor winding, or the battery self-heating function can be realized by multiplexing the motor winding, thereby realizing various functional requirements of the vehicle by controlling the switching states of the switch circuits, and solving the problem of single function caused by the independent battery charging circuit and motor driving circuit in the related art.

[0052] The above description is only a summary of the technical solution of the application, in order to enable the technical means of the application to be more clearly understood, the specific embodiments of the application can be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the application to be more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0053] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the scope of the application. Moreover, the same reference numerals in the attached drawings refer to the same or similar components. In the drawings:

[0054] Figure 1 The first schematic diagram of the single-motor high-voltage architecture provided by the embodiment of the application;

[0055] Figure 2a The second schematic diagram of the single-motor high-voltage architecture provided by the embodiment of the application;

[0056] Figure 2b The current schematic diagram of the single electric drive high-voltage architecture provided by the embodiment of the present application when working in the direct current fast charging mode is shown in FIG. 1;

[0057] Figure 3 The third schematic diagram of the single electric drive high-voltage architecture provided by the embodiment of the present application is shown in FIG. 2;

[0058] Figure 4a The fourth schematic diagram of the single electric drive high-voltage architecture provided by the embodiment of the present application is shown in FIG. 3;

[0059] Figure 4b The current schematic diagram of the single electric drive high-voltage architecture provided by the embodiment of the present application when working in the direct current fast charging mode is shown in FIG. 1; Figure 4c

[0060] The fifth schematic diagram of the single electric drive high-voltage architecture provided by the embodiment of the present application is shown in FIG. 4; Figure 5a

[0061] The current schematic diagram of the single electric drive high-voltage architecture provided by the embodiment of the present application when working in the direct current fast charging mode is shown in FIG. 1; Figure 5b Figure 5c The current schematic diagram of the single electric drive high-voltage architecture provided by the embodiment of the present application when working in the direct current fast charging mode is shown in FIG. 1;

[0062] Figure 5d Figure 5e The current schematic diagram of the single electric drive high-voltage architecture provided by the embodiment of the present application when working in the direct current fast charging mode is shown in FIG. 1;

[0063] Figure 6 The sixth schematic diagram of the single electric drive high-voltage architecture provided by the embodiment of the present application is shown in FIG. 5;

[0064] Figure 7 The seventh schematic diagram of the single electric drive high-voltage architecture provided by the embodiment of the present application is shown in FIG. 6;

[0065] Figure 8 The eighth schematic diagram of the single electric drive high-voltage architecture provided by the embodiment of the present application is shown in FIG. 7. DETAILED DESCRIPTION

[0066] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore cannot be used to limit the protection scope of the present application.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. ​​

[0068] In the description of the embodiments of the present application, the technical terms "first", "second" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0069] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The phrase is not necessarily referring to the same embodiment at different places in the specification, nor is it necessarily referring to a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0070] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0071] In the related art, the battery charging circuit and the motor driving circuit in the electric vehicle are separated, and the two circuits do not interfere with each other and are independent of each other, which not only requires a more complex circuit structure, but also has the problem of single function.

[0072] To solve the above technical problems, the embodiments of the present application provide a single motor drive high-voltage architecture, as shown in Figure 1 As shown, the single motor drive high-voltage architecture includes: a first battery 110, a second battery 120, a main positive switch circuit 210, a main negative switch circuit 220, a winding switch circuit 230, a bridge inverter circuit 310, a motor winding 320 and a main control circuit 800; the first battery 110 and the second battery 120 are connected in series to form a high-voltage battery, and the electric drive neutral line of the motor winding 320 is connected to the common node of the first battery 110 and the second battery 120 through the winding switch circuit 230; the positive electrode of the high-voltage battery is connected to the first end of the bridge inverter circuit 310 through the main positive switch circuit 210, and the negative electrode of the high-voltage battery is connected to the second end of the bridge inverter circuit 310 through the main negative switch circuit 220; the working states of the main positive switch circuit 210, the main negative switch circuit 220, the winding switch circuit 230 and the bridge inverter circuit 310 are controlled by the main control circuit 800.

[0073] In this embodiment, the operating states of the main positive switch circuit 210, the main negative switch circuit 220, the winding switch circuit 230, and the bridge inverter circuit 310 are controlled by the main control circuit 800. The main control circuit 800 can control the switching states of the main positive switch circuit 210, the main negative switch circuit 220, the winding switch circuit 230, and the bridge inverter circuit 310 so that the high-voltage battery provides power to the bridge inverter circuit 310 through the main positive switch circuit 210 and the main negative switch circuit 220, and the bridge inverter circuit 310 outputs a corresponding current to the motor winding 320, thereby driving the motor to work. Furthermore, the main control circuit 800 controls the switching states of the main positive switch circuit 210, the main negative switch circuit 220, the winding switch circuit 230, and the bridge inverter circuit 310. This allows the external high-voltage load and the motor winding 320 to be reused so that the external charging circuit can select the appropriate charging mode to charge the high-voltage battery. It also allows the motor winding 320 to be reused to achieve the battery's self-heating function. Thus, by controlling the switching states of each switch circuit, the vehicle's multiple functional requirements can be met, solving the problem of the battery charging circuit and the motor drive circuit being independent and resulting in limited functionality in related technologies.

[0074] In some embodiments, the first battery 110 may be a battery pack, which may include multiple battery cells.

[0075] In some embodiments, the second battery 120 may be a battery pack, which may include multiple battery cells.

[0076] In some embodiments, the voltages of the first battery 110 and the second battery 120 may be the same.

[0077] In some embodiments, the voltage range of the first battery 110 and the second battery 120 can be 100V-1200V.

[0078] In some embodiments, the voltage of the first battery 110 and the second battery 120 can be 400V, and the high-voltage battery formed by the first battery 110 and the second battery 120 connected in series can be an 800V battery.

[0079] In some embodiments, the first battery 110 and the second battery 120 may be lithium batteries.

[0080] In some embodiments, see Figure 2a As shown, the single-electric-drive high-voltage architecture also includes: a DC charging circuit 400, a direct charging positive switch circuit 410, and a direct charging negative switch circuit 420; the positive terminal of the DC charging circuit 400 is connected to the positive terminal of the high-voltage battery via the direct charging positive switch circuit 410, and the negative terminal of the DC charging circuit 400 is connected to the negative terminal of the high-voltage battery via the direct charging negative switch circuit 420.

[0081] In the embodiment of the present application, the positive electrode of the direct current charging circuit 400 is connected to the positive electrode of the high-voltage battery through the direct charging positive electrode switch circuit 410, and the negative electrode of the direct current charging circuit 400 is connected to the negative electrode of the high-voltage battery through the direct charging negative electrode switch circuit 420, so that the charging of the high-voltage battery can be realized. In addition, the switch states of the main positive switch circuit 210, the main negative switch circuit 220, the direct charging positive electrode switch circuit 410, the direct charging negative electrode switch circuit 420, the winding switch circuit 230 and the bridge inverter circuit 310 are controlled by the main control circuit 800, so that the charging of the high-voltage battery in the direct current fast charging mode can be realized, and the motor winding 320 can be multiplexed to select the current boosting charging mode or the voltage boosting charging mode for the high-voltage battery. In addition, the motor winding 320 can be multiplexed to realize the self-heating function of the battery. The switch states of each switch circuit are controlled by the main control circuit 800 to realize the multiple function requirements of the high-voltage battery of the vehicle, and solve the problem of single function caused by the independent battery charging circuit and motor driving circuit in the related art.

[0082] In some embodiments, the main control circuit 800 is configured to control the main positive switch circuit 210, the main negative switch circuit 220 and the winding switch circuit 230 to be turned off, and control the direct current charging circuit 400 to charge the high-voltage battery through the direct charging positive electrode switch circuit 410 and the direct charging negative electrode switch circuit 420 when working in the direct current fast charging mode.

[0083] In the embodiment of the present application, in combination with Figure 2b As shown in FIG. 8, the main control circuit 800 controls the main positive switch circuit 210, the main negative switch circuit 220 and the winding switch circuit 230 to be turned off, and the direct charging positive electrode switch circuit 410 and the direct charging negative electrode switch circuit 420 to be turned on, so as to control the direct current charging circuit 400 to charge the high-voltage battery through the direct charging positive electrode switch circuit 410 and the direct charging negative electrode switch circuit 420. The single motor drive high-voltage architecture can work in the direct current fast charging mode, and the direct current charging circuit 400 can realize the fast charging of the high-voltage battery.

[0084] In some embodiments, referring to Figure 3 As shown in FIG. 8, the single motor drive high-voltage architecture further includes an anti-reverse circuit 510 connected between the motor winding 320 and the main positive switch circuit 210, and the anti-reverse circuit 510 is configured to prevent the output current of the main positive switch circuit 210 from flowing back to the motor winding 320.

[0085] In the embodiment of the present application, by setting the anti-reverse circuit 510 between the electric drive neutral line of the motor winding 320 and the main positive switch circuit 210, the freewheeling and discharging of the motor winding 320 can be flexibly controlled, so that the DC charging circuit 400 can reuse the motor winding 320 during the charging process of the high-voltage battery, realize the current boosting charging function of the single electric drive high-voltage architecture, improve the charging current of the DC charging circuit 400 to the high-voltage battery, enhance the charging capability of the single electric drive high-voltage architecture, and because the motor winding 320 is reused, the complexity and volume of the single electric drive high-voltage architecture are reduced.

[0086] In some embodiments, referring to Figure 4a As shown, the single electric drive high-voltage architecture further includes: a first switch circuit 610 and a second switch circuit 620, the first switch circuit 610 is connected between the bridge inverter circuit 310 and the main positive switch circuit 210; the second switch circuit 620 is connected between the common node of the first switch circuit 610 and the bridge inverter circuit 310 and the positive electrode of the DC charging circuit 400; and the switch states of the first switch circuit 610 and the second switch circuit 620 are controlled by the master control circuit 800.

[0087] In the embodiment of the present application, by setting the first switch circuit 610 and the second circuit between the DC charging circuit 400 and the main positive switch circuit 210, and setting the anti-reverse circuit 510 between the electric drive neutral line of the motor winding 320 and the main positive switch circuit 210, the current path of the DC current output by the DC charging circuit 400 can be flexibly controlled, so that the motor winding 320 performs freewheeling and discharging in different current paths, and the DC charging circuit 400 can reuse the motor winding 320 during the charging process of the high-voltage battery. In this way, the current boosting charging function of the single electric drive high-voltage architecture can be realized, the charging current of the DC charging circuit 400 to the high-voltage battery can be improved, the charging capability of the single electric drive high-voltage architecture can be enhanced, and because the motor winding 320 is reused, no additional inductor component needs to be set, the vehicle strategy is simplified, the charging strategy of the high-voltage battery is more diversified, the complexity and volume of the single electric drive high-voltage architecture are reduced, and the weight and cost of the vehicle are also reduced.

[0088] In some embodiments, the master control circuit 800 is configured to control the motor winding 320 to alternately work in the freewheeling charging condition and the step-down discharging condition when working in the current boosting charging mode.

[0089] In the embodiment of the application, the current output by the direct current charging circuit 400 can be controlled to pass through the motor winding 320 and then form a BUCK step-down circuit in series with an external charging machine (connected with the direct current charging circuit 400) to form a freewheeling charging working condition. Then, the upper bridge arm of the bridge inverter circuit 310 is controlled to be turned off, and the motor winding 320 is controlled to alternately work in the freewheeling charging working condition and the step-down discharging working condition by the main control circuit 800. Thus, in the boost charging mode, the motor winding 320 is reused to charge the high-voltage battery by the direct current charging circuit 400, multiple function requirements of the high-voltage battery of the vehicle are realized, and the problem of single function caused by independent battery charging circuit and motor driving circuit in the related art is solved.

[0090] In some embodiments, in combination with Figure 4b As shown in FIG. 6, when the main control circuit 800 controls the motor winding 320 to work in the freewheeling charging working condition, the first switch circuit 610, the main negative switch circuit 220 and the winding switch circuit 230 are controlled to be turned off, and the direct current output by the direct current charging circuit 400 is controlled to pass through the second switch circuit 620, the bridge inverter circuit 310, the motor winding 320, the anti-reverse circuit 510, the main positive switch circuit 210, the high-voltage battery and the direct charging negative switch circuit 420 to form a charging loop, and the motor winding 320 is charged in freewheeling.

[0091] In the embodiment of the application, the main control circuit 800 can control the upper bridge arm of the bridge inverter circuit 310 to be turned on, the lower bridge arm of the bridge inverter circuit 310 to be turned off, and the second switch circuit 620, the anti-reverse circuit 510 and the direct charging negative switch circuit 420 to be turned on. The current output by the direct current charging circuit 400 can be controlled to pass through the second switch circuit 620, the bridge inverter circuit 310, the motor winding 320, the anti-reverse circuit 510, the main positive switch circuit 210, the high-voltage battery and the direct charging negative switch circuit 420 to form a charging loop, and the charging loop includes an external charging machine (connected with the direct current charging circuit 400). Thus, a BUCK step-down circuit can be formed in series to form a freewheeling charging working condition. Then, the upper bridge arm of the bridge inverter circuit 310 is controlled to be turned off, and the motor winding 320 is controlled to alternately work in the freewheeling charging working condition and the step-down discharging working condition by the main control circuit 800. Thus, in the boost charging mode, the motor winding 320 is reused to charge the high-voltage battery by the direct current charging circuit 400, multiple function requirements of the high-voltage battery of the vehicle are realized, and the problem of single function caused by independent battery charging circuit and motor driving circuit in the related art is solved.

[0092] In some embodiments, in combination with Figure 4cAs shown, when the motor winding 320 is controlled by the main control circuit 800 to work in the discharging mode, the first switch circuit 610, the second switch circuit 620 and the winding switch circuit 230 are controlled to be turned off, and the motor winding 320 is controlled to charge the high-voltage battery through the anti-reverse circuit 510, the main positive switch circuit 210, the high-voltage battery, the direct charging negative switch circuit 420 and the bridge inverter circuit 310.

[0093] In the embodiment of the application, the current output by the direct current charging circuit 400 is formed into a BUCK step-down circuit in series with the charger connected to the direct current charging circuit 400 after the current is freewheeled through the motor winding 320, a freewheeling charging mode is formed, then the upper arm of the bridge inverter circuit 310 is controlled to be turned off, the first switch circuit 610, the second switch circuit 620 and the winding switch circuit 230 are controlled to be turned off, and the motor winding 320 is controlled to charge the high-voltage battery through the anti-reverse circuit 510, the main positive switch circuit 210, the high-voltage battery, the direct charging negative switch circuit 420 and the bridge inverter circuit 310, the main control circuit 800 can control the motor winding 320 to alternately work in the freewheeling charging mode and the discharging mode, so that the motor winding 320 is reused to charge the high-voltage battery in the boost charging mode, multiple functional requirements of the high-voltage battery of the vehicle are achieved, and the problem of single function caused by independent battery charging circuit and motor driving circuit in the related art is solved.

[0094] In some embodiments, referring to Figure 5a As shown, the single motor driving high-voltage architecture further includes a third switch circuit 630 connected between the positive electrode of the direct current charging circuit 400 and the motor driving neutral line of the motor winding 320.

[0095] In the embodiment of the application, the third switch circuit 630 is arranged between the positive electrode of the direct current charging circuit 400 and the motor driving neutral line of the motor winding 320, so as to provide a current path between the positive electrode of the direct current charging circuit 400 and the motor driving neutral line of the motor winding 320, the main control circuit 800 can control the third switch circuit 630 to form a BOOST step-up circuit in series with the motor winding 320 after the current is freewheeled, so as to provide a boost charging mode for the single motor driving high-voltage architecture, the motor winding 320 is reused to charge the high-voltage battery in the boost charging mode, multiple functional requirements of the high-voltage battery of the vehicle are achieved, and the problem of single function caused by independent battery charging circuit and motor driving circuit in the related art is solved.

[0096] In some embodiments, the main control circuit 800 is configured to control the motor winding 320 to alternately work in the step-up freewheeling mode and the step-up discharging mode when working in the boost charging mode.

[0097] In the embodiment of the present application, by setting the third switch circuit 630 between the positive electrode of the direct current charging circuit 400 and the electric drive neutral line of the motor winding 320, a current path is provided between the positive electrode of the direct current charging circuit 400 and the electric drive neutral line of the motor winding 320. The main control circuit 800 can control the switching state of the third switch circuit 630, so that the motor winding 320 forms a BOOST boost circuit in series with the charger after continuous current. When the single electric drive high-voltage architecture works in the boost charging mode, the main positive switch circuit 210, the main negative switch circuit 220, the anti-reverse circuit 510, the bridge inverter circuit 310 and the motor winding 320 are alternately controlled by the main control circuit 800 to work in the boost continuous current working condition and the boost discharge working condition. In the boost charging mode, the motor winding 320 is multiplexed by the direct current charging circuit 400 to boost charge the high-voltage battery, realize the multiple function requirements of the high-voltage battery of the vehicle, and solve the problem of single function caused by the independent battery charging circuit and motor driving circuit in the related art.

[0098] In some embodiments, in combination with Figure 5b As shown, when the main control circuit 800 controls the motor winding 320 to work in the boost continuous current working condition, the direct charging positive electrode switch circuit 410, the main positive switch circuit 210 and the winding switch circuit 230 are turned off, and the direct current output by the direct current charging circuit 400 is controlled to pass through the third switch circuit 630, the motor winding 320, the bridge inverter circuit 310, the main negative switch circuit 220 and the direct charging negative electrode switch circuit 420 to form a charging loop, and the motor winding 320 is continuously current.

[0099] In the embodiment of the present application, the third switch circuit 630 is arranged between the positive electrode of the direct current charging circuit 400 and the electric drive neutral line of the motor winding 320, and can provide a current path between the positive electrode of the direct current charging circuit 400 and the electric drive neutral line of the motor winding 320. The main control circuit 800 can control the switching state of the third switch circuit 630, so that the motor winding 320 is in series with the charger to form a BOOST boost circuit after current continuation. The main control circuit 800 controls the direct charging positive electrode switch circuit 410, the main positive switch circuit 210, and the winding switch circuit 230 to be turned off, and controls the direct current output by the direct current charging circuit 400 to pass through the third switch circuit 630, the motor winding 320, the bridge inverter circuit 310, the main negative switch circuit 220, and the direct charging negative electrode switch circuit 420 to form a charging circuit, so that the motor winding 320 works in a boost current continuation condition. The main positive switch circuit 210, the main negative switch circuit 220, the anti-reverse circuit 510, the bridge inverter circuit 310, and the motor winding 320 are alternately controlled by the main control circuit 800 to work in a boost current continuation condition and a boost discharge condition. In the boost charging mode, the motor winding 320 is used to boost charge the high-voltage battery through the direct current charging circuit 400, to realize multiple functional requirements of the high-voltage battery of the vehicle, and solve the problem of single function caused by independent battery charging circuit and motor driving circuit in the related art.

[0100] In some embodiments, in combination with Figure 5c As shown, when the main control circuit 800 controls the motor winding 320 to work in a boost discharge condition, the direct charging positive electrode switch circuit 410, the main negative switch circuit 220, and the winding switch circuit 230 are turned off, and the motor winding 320 is controlled to pass through the bridge inverter circuit 310, the main positive switch circuit 210, the high-voltage battery, the direct charging negative electrode switch circuit 420, the direct current charging circuit 400, and the third switch circuit 630 to form a discharge circuit to charge the high-voltage battery.

[0101] In the embodiment of the present application, the main control circuit 800 controls the direct charging positive electrode switch circuit 410, the main negative switch circuit 220, and the winding switch circuit 230 to be turned off, and controls the motor winding 320 to pass through the bridge inverter circuit 310, the main positive switch circuit 210, the high-voltage battery, the direct charging negative electrode switch circuit 420, the direct current charging circuit 400, and the third switch circuit 630 to form a discharge circuit, so that the motor winding 320 works in a boost discharge condition. The main positive switch circuit 210, the main negative switch circuit 220, the anti-reverse circuit 510, the bridge inverter circuit 310, and the motor winding 320 are alternately controlled by the main control circuit 800 to work in a boost current continuation condition and a boost discharge condition. In the boost charging mode, the motor winding 320 is used to boost charge the high-voltage battery through the direct current charging circuit 400, to realize multiple functional requirements of the high-voltage battery of the vehicle, and solve the problem of single function caused by independent battery charging circuit and motor driving circuit in the related art.

[0102] In some embodiments, the main control circuit 800 is configured to control the motor winding 320 to alternately operate in the self-heating freewheeling condition and the self-heating discharging condition when operating in the self-heating mode.

[0103] In the technical solution of the embodiments of the present application, the main control circuit 800 can control the first battery 110 and the second battery 120 to store and discharge energy with the motor winding 320 by controlling the bridge inverter circuit 310, the main positive switch circuit 210, the main negative switch circuit 220, and the winding switch circuit 230. In the self-heating mode, the motor winding 320 is controlled to alternately operate in the self-heating freewheeling condition and the self-heating discharging condition by multiplexing the motor winding 320. Thus, the self-heating function is realized by relying on the internal resistance of the first battery 110 and the second battery 120, various functional requirements of the high-voltage battery of the vehicle are realized, and the problem of single function caused by independent battery charging circuit and motor driving circuit in the related art is solved.

[0104] In some embodiments, in combination with Figure 5d As shown in FIG. 7, when the main control circuit 800 controls the motor winding 320 to operate in the self-heating freewheeling condition, the main control circuit 800 controls the direct charging positive switch circuit 410, the direct charging negative switch circuit 420, and the main negative switch circuit 220 to be turned off, and controls the direct current output by the first battery 110 to form a charging loop through the main positive switch circuit 210, the bridge inverter circuit 310, the motor winding 320, and the winding switch circuit 230, so as to perform freewheeling on the motor winding 320.

[0105] In the embodiments of the present application, the main control circuit 800 can control the first battery 110 and the second battery 120 to store and discharge energy with the motor winding 320 by controlling the bridge inverter circuit 310, the main positive switch circuit 210, the main negative switch circuit 220, and the winding switch circuit 230. In the self-heating mode, the motor winding 320 is controlled to alternately operate in the self-heating freewheeling condition and the self-heating discharging condition by multiplexing the motor winding 320. In this way, the main control circuit 800 can control the direct current output by the first battery 110 to form a charging loop through the main positive switch circuit 210, the bridge inverter circuit 310, the motor winding 320, and the winding switch circuit 230, so as to perform freewheeling on the motor winding 320, and then control the motor winding 320 to discharge. Thus, the self-heating function is realized by relying on the internal resistance of the first battery 110 and the second battery 120, various functional requirements of the high-voltage battery of the vehicle are realized, and the problem of single function caused by independent battery charging circuit and motor driving circuit in the related art is solved.

[0106] In some embodiments, in combination with Figure 5eAs shown, when the main control circuit 800 controls the motor winding 320 to work in the self-heating discharge working condition, the control of the direct charging positive electrode switch circuit 410, the direct charging negative electrode switch circuit 420 and the main positive switch circuit 210 is turned off, and the motor winding 320 is controlled to pass through the winding switch circuit 230, the second battery 120, the main negative switch circuit 220 and the bridge inverter circuit 310 to form a discharge loop, so as to heat the second battery 120.

[0107] In the embodiment of the application, the main control circuit 800 can control the bridge inverter circuit 310, the main positive switch circuit 210, the main negative switch circuit 220 and the winding switch circuit 230 to store energy and discharge among the first battery 110, the second battery 120 and the motor winding 320. In the self-heating mode, the motor winding 320 is controlled to alternately work in the self-heating freewheeling working condition and the self-heating discharge working condition. The control of the direct charging positive electrode switch circuit 410, the direct charging negative electrode switch circuit 420 and the main positive switch circuit 210 can be turned off by the main control circuit 800, and the motor winding 320 is controlled to pass through the winding switch circuit 230, the second battery 120, the main negative switch circuit 220 and the bridge inverter circuit 310 to form a discharge loop, so as to heat the second battery 120. Thus, the self-heating function is realized by relying on the internal resistance of the first battery 110 and the second battery 120, the multiple functional requirements of the high-voltage battery of the vehicle are realized, and the problem of single function caused by the independent battery charging circuit and the motor driving circuit in the related art is solved.

[0108] In some embodiments, referring to Figure 6 As shown, the single motor drive high-voltage architecture further includes a pre-charging switch circuit 710, which is connected in parallel with the main positive switch circuit 210.

[0109] In the embodiment of the application, by connecting the pre-charging switch circuit 710 in parallel with the main positive switch circuit 210, the high-voltage battery can be pre-charged by the pre-charging switch circuit 710 before formal charging, and the multiple functional requirements of the high-voltage battery of the vehicle are realized.

[0110] In some embodiments, referring to Figure 7 As shown, the single motor drive high-voltage architecture further includes a vehicle-mounted charging circuit 720, which is connected with the main positive switch circuit 210 and the main negative switch circuit 220, and is used for charging the high-voltage battery under the control of the main control circuit 800.

[0111] In this embodiment, the on-board charging circuit 720 is controlled by the main control circuit 800. It can charge the high-voltage battery through the main positive switch circuit 210 and the main negative switch circuit 220. It can also use the on-board charging circuit 720 to reuse the bridge inverter circuit 310 and the motor winding 320 to realize the multiple functional requirements of the vehicle's high-voltage battery. This solves the problem in related technologies where the battery charging circuit and the motor drive circuit are independent, resulting in a single function.

[0112] In some embodiments, see Figure 8 As shown, the main positive switch circuit 210 includes a main positive relay K1, and the two ends of the main positive relay K1 are connected to the positive terminal of the high voltage battery and the positive terminal of the on-board charging circuit 720, respectively.

[0113] In some embodiments, see Figure 8 As shown, a first fuse F1 and a Hall current sensor H1 are also provided between the main positive switch circuit 210 and the high-voltage battery. The main positive switch circuit 210, the first fuse F1, and the Hall current sensor H1 are connected in series to the positive terminal of the high-voltage battery. The Hall current sensor H1 is used to detect the current flowing through the positive terminal of the high-voltage battery and send the sampling signal to the main control circuit 800.

[0114] In some embodiments, see Figure 8 As shown, the main negative switch circuit 220 includes a main negative relay K2, which is connected between the negative terminal of the high-voltage battery and the bridge inverter circuit 310.

[0115] In some embodiments, see Figure 8 As shown, the direct charging positive switch circuit 410 includes a direct charging positive relay Kc1, and the two ends of the direct charging positive relay Kc1 are respectively connected to the positive terminal of the DC charging circuit 400 and the positive terminal of the high-voltage battery.

[0116] In some embodiments, see Figure 8 As shown, the direct charging negative switch circuit 420 includes a direct charging negative relay Kc2, and the two ends of the direct charging negative relay Kc2 are respectively connected to the negative terminal of the DC charging circuit 400 and the negative terminal of the high-voltage battery.

[0117] In some embodiments, see Figure 8 As shown, a shunt resistor Ks1 is also provided between the main negative switch circuit 220 and the negative terminal of the high-voltage battery. The two ends of the shunt resistor Ks1 are connected to the main negative switch circuit 220 and the negative terminal of the high-voltage battery, respectively.

[0118] In some embodiments, see Figure 8 As shown, the first switching circuit 610 includes a first relay Ku1, which is connected in series with the main positive switching circuit 210.

[0119] In some embodiments, seeFigure 8 As shown, the second switch circuit 620 comprises a second relay Ku2, two ends of the second relay Ku2 are connected with the first relay Ku1 and the positive pole of the direct current charging circuit 400 respectively.

[0120] In some embodiments, referring to Figure 8 As shown, the third switch circuit 630 comprises a third relay Ku3, two ends of the third relay Ku3 are connected with the winding neutral line of the motor winding 320 and the positive pole of the direct current charging circuit 400 respectively.

[0121] In some embodiments, the switch states of the first relay Ku1, the second relay Ku2 and the third relay Ku3 are controlled by the master control circuit 800.

[0122] In some embodiments, referring to Figure 8 As shown, the positive pole of the vehicle-mounted charging circuit 720 and the second switch circuit 620 are further connected with a second fuse F2, two ends of the second fuse F2 are connected with the positive pole of the vehicle-mounted charging circuit 720 and the second switch circuit 620 respectively.

[0123] In some embodiments, referring to Figure 8 As shown, the bridge inverter circuit 310 comprises a first upper bridge arm Q11, a first lower bridge arm Q12, a second upper bridge arm Q21, a second lower bridge arm Q22, a third upper bridge arm Q31, a third lower bridge arm Q32, the motor winding 320 comprises a first winding L1, a second winding L2, a third winding L3, the first upper bridge arm Q11 and the first lower bridge arm Q12 constitute a half bridge circuit, a common node of the first upper bridge arm Q11 and the first lower bridge arm Q12 is connected with a first end of the first winding L1, the second upper bridge arm Q21 and the second lower bridge arm Q22 constitute a half bridge circuit, a common node of the second upper bridge arm Q21 and the second lower bridge arm Q22 is connected with a first end of the second winding L2, the third upper bridge arm Q31 and the third lower bridge arm Q32 constitute a half bridge circuit, a common node of the third upper bridge arm Q31 and the third lower bridge arm Q32 is connected with a first end of the third winding L3, second ends of the first winding L1, the second winding L2 and the third winding L3 are connected with the winding neutral line of the motor winding 320.

[0124] In some embodiments, the switch states of the first upper bridge arm Q11, the first lower bridge arm Q12, the second upper bridge arm Q21, the second lower bridge arm Q22, the third upper bridge arm Q31 and the third lower bridge arm Q32 are controlled by the master control circuit 800.

[0125] In some embodiments, the first upper bridge arm Q11, the first lower bridge arm Q12, the second upper bridge arm Q21, the second lower bridge arm Q22, the third upper bridge arm Q31 and the third lower bridge arm Q32 can be any one of a triode, a MOS tube or an IGBT.

[0126] In some embodiments, referring to Figure 8 As shown in the figure, the winding neutral line of the motor winding 320 and the winding switch circuit 230 are further provided with a main-passive integrated fuse F3, which can prevent the problem of battery or component damage caused by excessive discharge current of the motor winding 320 in the boost charging mode.

[0127] In some embodiments, referring to Figure 8 As shown in the figure, the anti-reverse circuit 510 includes a first diode D1 and a first switch Ks1, the first diode D1 and the first switch Ks1 are connected in series, the cathode of the first diode D1 is connected to the main positive switch circuit 210 through the first switch Ks1, and the anode of the first diode D1 is connected to the winding neutral line of the motor winding 320.

[0128] In this embodiment, the switching state of the first switch Ks1 is controlled by the master control circuit 800, which can provide a corresponding current path between the winding neutral line of the motor winding 320 and the main positive switch circuit 210, and can prevent the positive current of the high-voltage battery from charging the motor winding 320 through the current path, and can also avoid the short circuit of the high-voltage battery. By controlling the switching state of each switch circuit through the master control circuit 800, various functional requirements of the vehicle can be realized, solving the problem of single function caused by independent battery charging circuit and motor driving circuit in the related art.

[0129] In some embodiments, referring to Figure 8 As shown in the figure, the common node of the second switch circuit 620 and the third switch circuit 630 and the negative electrode of the high-voltage battery are further connected with a second switch Ks2 and a first capacitor C1, and the second switch Ks2 and the first capacitor C1 are connected in series.

[0130] In this embodiment, the switching state of the second switch Ks2 is controlled by the master control circuit 800, which can provide a current path between the second switch circuit 620 and the negative electrode of the high-voltage battery, and can also provide a current path between the third switch circuit 630 and the negative electrode of the high-voltage battery, so as to realize various functional requirements of the vehicle by controlling the switching state of each switch circuit, solving the problem of single function caused by independent battery charging circuit and motor driving circuit in the related art.

[0131] The embodiments of the present application also provide a vehicle, which comprises the single-motor high-voltage architecture according to any one of the above embodiments.

[0132] In the embodiments of the present application, the vehicle includes a high-voltage battery, and the main control circuit 800 controls the switching states of the main positive switch circuit 210, the main negative switch circuit 220, the winding switch circuit 230 and the bridge inverter circuit 310, so that the high-voltage battery provides power to the bridge inverter circuit 310 through the main positive switch circuit 210 and the main negative switch circuit 220, and the bridge inverter circuit 310 outputs corresponding current to the motor winding 320, thereby driving the motor to work. Moreover, the main control circuit 800 controls the switching states of the main positive switch circuit 210, the main negative switch circuit 220, the winding switch circuit 230 and the bridge inverter circuit 310, which can not only reuse the external high-voltage load and the motor winding 320 to make the external charging circuit select the corresponding charging mode to charge the high-voltage battery, but also reuse the motor winding 320 to realize the self-heating function of the battery, thereby realizing various functional requirements of the vehicle by controlling the switching states of the various switch circuits, and solving the problem of single function caused by the independent battery charging circuit and motor driving circuit in the related art.

[0133] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0134] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0135] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the electronic device embodiments described above are only schematic. For example, the division of modules or units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0136] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0137] In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, or each unit can exist physically, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0138] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A single electric drive high voltage architecture, characterized in that, The single-motor high-voltage architecture comprises a first battery, a second battery, a main positive switch circuit, a main negative switch circuit, a winding switch circuit, a bridge inverter circuit, a motor winding, and a main control circuit. The first battery and the second battery are connected in series to form a high-voltage battery, and a motor neutral line of the motor winding is connected to a common node of the first battery and the second battery through the winding switch circuit. A positive electrode of the high-voltage battery is connected to a first end of the bridge inverter circuit through the main positive switch circuit, and a negative electrode of the high-voltage battery is connected to a second end of the bridge inverter circuit through the main negative switch circuit. Working states of the main positive switch circuit, the main negative switch circuit, the winding switch circuit, and the bridge inverter circuit are controlled by the main control circuit.

2. The single electric drive high voltage architecture of claim 1, wherein, The single-motor high-voltage architecture further comprises a direct-current charging circuit, a direct-charge positive electrode switch circuit, and a direct-charge negative electrode switch circuit. A positive electrode of the direct-current charging circuit is connected to a positive electrode of the high-voltage battery through the direct-charge positive electrode switch circuit, and a negative electrode of the direct-current charging circuit is connected to a negative electrode of the high-voltage battery through the direct-charge negative electrode switch circuit.

3. The single electric drive high voltage architecture of claim 2, wherein, When working in a direct-current fast charging mode, the main control circuit controls the main positive switch circuit, the main negative switch circuit, and the winding switch circuit to be turned off, and controls the direct-current charging circuit to charge the high-voltage battery through the direct-charge positive electrode switch circuit and the direct-charge negative electrode switch circuit.

4. The single electric drive high voltage architecture of claim 2, wherein, The single-motor high-voltage architecture further comprises: A reverse prevention circuit connected between the motor neutral line and the main positive switch circuit, for preventing output current of the main positive switch circuit from flowing back to the motor winding.

5. The single electric drive high voltage architecture of claim 4, wherein, The single-motor high-voltage architecture further comprises: A first switch circuit connected between the bridge inverter circuit and the main positive switch circuit; A second switch circuit connected between a common node of the first switch circuit and the bridge inverter circuit and a positive electrode of the direct-current charging circuit; Switching states of the first switch circuit and the second switch circuit are controlled by the main control circuit, for providing a current path between the positive electrode of the direct-current charging circuit and the bridge inverter circuit, and providing a current path between the positive electrode of the direct-current charging circuit and the main positive switch circuit.

6. The single electric drive high voltage architecture of claim 5, wherein, When working in a boost current charging mode, the main control circuit controls the motor winding to alternately work in a freewheeling charging condition and a step-down discharging condition.

7. The single electric drive high voltage architecture of claim 6, wherein, When the main control circuit controls the motor winding to work in the freewheeling charging condition, the main control circuit controls the first switch circuit, the main negative switch circuit, and the winding switch circuit to be turned off, and controls direct-current electricity output by the direct-current charging circuit to form a charging loop through the second switch circuit, the bridge inverter circuit, the motor winding, the reverse prevention circuit, the main positive switch circuit, the high-voltage battery, and the direct-charge negative electrode switch circuit, for freewheeling of the motor winding.

8. The single electric drive high voltage architecture of claim 6, wherein, The main control circuit controls the motor winding to work in the step-down discharging mode, controls the first switch circuit, the second switch circuit and the winding switch circuit to be off, and controls the motor winding to form a discharging loop through the anti-reverse circuit, the main positive switch circuit, the high-voltage battery, the direct-charging negative switch circuit and the bridge inverter circuit to charge the high-voltage battery.

9. The single electric drive high voltage architecture of claim 2, wherein, The single-motor high-voltage architecture further comprises: A third switch circuit connected between the positive electrode of the direct-current charging circuit and the motor winding electric drive neutral line; The third switch circuit is controlled by the main control circuit and is used to provide a current path between the positive electrode of the direct-current charging circuit and the motor winding electric drive neutral line.

10. The single electric drive high voltage architecture of claim 9, wherein, The main control circuit is used to control the motor winding to alternately work in the step-up freewheeling mode and the step-up discharging mode when working in the step-up charging mode.

11. The single electric drive high voltage architecture of claim 10, wherein, The main control circuit controls the motor winding to work in the step-up freewheeling mode, controls the direct-charging positive switch circuit, the main positive switch circuit and the winding switch circuit to be off, and controls the direct-current power output by the direct-current charging circuit to form a charging loop through the third switch circuit, the motor winding, the bridge inverter circuit, the main negative switch circuit and the direct-charging negative switch circuit to freewheel the motor winding.

12. The single electric drive high voltage architecture of claim 10, wherein, The main control circuit controls the motor winding to work in the step-up discharging mode, controls the direct-charging positive switch circuit, the main negative switch circuit and the winding switch circuit to be off, and controls the motor winding to form a discharging loop through the bridge inverter circuit, the main positive switch circuit, the high-voltage battery, the direct-charging negative switch circuit and the direct-current charging circuit and the third switch circuit to charge the high-voltage battery.

13. The single electric drive high voltage architecture of any of claims 2-12, wherein, The main control circuit is used to control the motor winding to alternately work in the self-heating freewheeling mode and the self-heating discharging mode when working in the self-heating mode.

14. The single electric drive high voltage architecture of claim 13, wherein, The main control circuit controls the motor winding to work in the self-heating freewheeling mode, controls the direct-charging positive switch circuit, the direct-charging negative switch circuit and the main negative switch circuit to be off, and controls the direct-current power output by the first battery to form a charging loop through the main positive switch circuit, the bridge inverter circuit, the motor winding and the winding switch circuit to freewheel the motor winding.

15. The single electric drive high voltage architecture of claim 13, wherein, The main control circuit controls the motor winding to work in the self-heating discharging mode, controls the direct-charging positive switch circuit, the direct-charging negative switch circuit and the main positive switch circuit to be off, and controls the motor winding to form a discharging loop through the winding switch circuit, the second battery and the main negative switch circuit and the bridge inverter circuit to heat the second battery.

16. The single electric drive high voltage architecture of any one of claims 1-12, wherein, The single-motor high-voltage architecture further comprises: A pre-charging switch circuit connected in parallel with the main positive switch circuit.

17. The single electric drive high voltage architecture of any one of claims 1-12, wherein, The single-motor high-voltage architecture further comprises: A vehicle-mounted charging circuit connected with the main positive switch circuit and the main negative switch circuit and used to be controlled by the main control circuit to charge the high-voltage battery.

18. A vehicle characterized by comprising: The single-motor high-voltage architecture comprises: The single-motor high-voltage architecture according to any one of claims 1-17.

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