Single‑electric drive high‑voltage architecture and vehicle

Abstract

The present application discloses a single-electric drive high-voltage architecture and a vehicle. A main control circuit controls the switching states of a main positive switch circuit, a main negative switch circuit, a winding switch circuit and a bridge inverter circuit, such that a high-voltage battery supplies power to the bridge inverter circuit by means of the main positive switch circuit and the main negative switch circuit, and the bridge inverter circuit outputs a corresponding current to a motor winding, thereby driving a motor to operate. In addition, by controlling the switching states of the main positive switch circuit, the main negative switch circuit, the winding switch circuit, and the bridge inverter circuit by the main control circuit, an external high-voltage load and the motor winding can be reused to enable an external charging circuit to select a corresponding charging mode to charge the high‑voltage battery, and the motor winding can also be reused to implement a self-heating function of the battery. Thus, by controlling the switching states of the switch circuits, multiple functional requirements of a vehicle can be met, thereby solving the problem in the prior art of limited functionality caused by the battery charging circuit and the motor drive circuit being independent of each other.

Description

Single electric drive high-voltage architecture, vehicle

[0001] This application incorporates Chinese Patent Application No. 202520138651.0, filed on January 20, 2025, entitled “Single Electric Drive High Voltage Architecture, Vehicle”, which is incorporated herein by reference in its entirety. Technical Field

[0002] This application relates to the field of vehicle technology, specifically to a single electric drive high-voltage architecture and a vehicle. Background Technology

[0003] Electric vehicles use electric motors as drive devices to move the vehicle. The power battery pack in an electric vehicle can provide power to the electric motor. Therefore, an electric vehicle needs a battery charging circuit to charge the power battery pack and a motor drive circuit to drive the electric motor. Technical issues

[0004] In related technologies, the battery charging circuit and the motor drive circuit in electric vehicles are separate. The two circuits do not interfere with each other and are independent of each other. This not only requires a more complex circuit structure, but also has the problem of limited functionality. Technical solutions

[0005] In view of the above problems, this application provides a single electric drive high-voltage architecture and vehicle, which aims to solve the problem that the battery charging circuit and the motor drive circuit are independent of each other in the related technology, resulting in limited functionality.

[0006] The first aspect of this application provides a single-electric-drive high-voltage architecture, which includes: 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.

[0007] The first battery and the second battery are connected in series to form a high-voltage battery. 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 switching circuit.

[0008] The positive terminal of the high-voltage battery is connected to the first terminal of the bridge inverter circuit via the main positive switch circuit, and the negative terminal of the high-voltage battery is connected to the second terminal of the bridge inverter circuit via the main negative switch circuit.

[0009] The operating 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.

[0010] In the technical solution of this application embodiment, the operating 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. The main 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. The bridge inverter circuit outputs a corresponding current to the motor winding, thereby driving the motor to work. Furthermore, by controlling the switching states of the main positive switch circuit, the main negative switch circuit, the winding switch circuit, and the bridge inverter circuit by the main control circuit, it is possible to reuse the external high-voltage load and the motor winding to allow the external charging circuit to select the appropriate charging mode to charge the high-voltage battery. It is also possible to reuse the motor winding to realize the self-heating function of the battery. Thus, by controlling the switching states of each switch circuit, multiple functional requirements of the vehicle can be met, solving the problem of the battery charging circuit and the motor drive circuit being independent and resulting in single function in related technologies.

[0011] In some embodiments, the single-electric-drive high-voltage architecture further includes: a DC charging circuit, a direct-charge positive terminal switch circuit, and a direct-charge negative terminal switch circuit;

[0012] The positive terminal of the DC charging circuit is connected to the positive terminal of the high-voltage battery via a direct charging positive terminal switch circuit, and the negative terminal of the DC charging circuit is connected to the negative terminal of the high-voltage battery via a direct charging negative terminal switch circuit.

[0013] In the technical solution of this application embodiment, the positive terminal of the DC charging circuit is connected to the positive terminal of the high-voltage battery via a direct charging positive terminal switch circuit, and the negative terminal of the DC charging circuit is connected to the negative terminal of the high-voltage battery via a direct charging negative terminal switch circuit, thus enabling the charging of the high-voltage battery. Furthermore, the main control circuit controls the switching states of the main positive switch circuit, the main negative switch circuit, the direct charging positive terminal switch circuit, the direct charging negative terminal switch circuit, the winding switch circuit, and the bridge inverter circuit. This allows for charging of the high-voltage battery in DC fast charging mode. It also allows the DC charging circuit to select either a boost charging mode or a boost charging mode for charging the high-voltage battery by reusing the motor windings. Furthermore, the motor windings can be reused to achieve a self-heating function for the battery. By controlling the switching states of each switch circuit through the main control circuit, multiple functional requirements of the vehicle's high-voltage battery are met, solving the problem of the independent battery charging circuit and motor drive circuit in related technologies, which resulted in limited functionality.

[0014] In some embodiments, the main control circuit is used to control the main positive switch circuit, the main negative switch circuit, and the winding switch circuit to turn off when operating in DC fast charging mode, and to control the DC charging circuit to charge the high-voltage battery through the direct charging positive switch circuit and the direct charging negative switch circuit.

[0015] In the technical solution of this application embodiment, the main control circuit controls the main positive switch circuit, the main negative switch circuit and the winding switch circuit to turn off, and controls the DC charging circuit to charge the high-voltage battery through the direct charging positive switch circuit and the direct charging negative switch circuit, which can enable the single electric drive high-voltage architecture to work in DC fast charging mode, and realize the DC charging circuit to quickly charge the high-voltage battery.

[0016] In some embodiments, the single-electric-drive high-voltage architecture further includes:

[0017] The anti-reverse circuit is connected between the electric drive neutral line of the motor winding and the main positive switch circuit to prevent the output current of the main positive switch circuit from flowing back into the motor winding.

[0018] In the technical solution of this application embodiment, by setting an anti-reverse circuit between the electric drive neutral line of the motor winding and the main positive switch circuit, the freewheeling current and discharge of the motor winding can be flexibly controlled, so that the DC charging circuit can reuse the motor winding during the charging process of the high-voltage battery, realize the boost charging function of the single electric drive high-voltage architecture, increase the charging current of the DC charging circuit to the high-voltage battery, enhance the charging capability of the single electric drive high-voltage architecture, and reduce the complexity and volume of the single electric drive high-voltage architecture due to the reuse of the motor winding.

[0019] In some embodiments, the single-electric-drive high-voltage architecture further includes:

[0020] The first switching circuit is connected between the bridge inverter circuit and the main positive switching circuit;

[0021] The second switching circuit is connected between the common node of the first switching circuit and the bridge inverter circuit and the positive terminal of the DC charging circuit.

[0022] The switching states of the first and second switching circuits are controlled by the main control circuit.

[0023] In the technical solution of this application embodiment, by setting a first switching circuit and a second circuit between the DC charging circuit and the main positive switching circuit, and setting an anti-reverse circuit between the electric drive neutral line of the motor winding and the main positive switching circuit, the current path of the DC power output by the DC charging circuit can be flexibly controlled, so that the motor winding can perform freewheeling and discharging in different current paths. Furthermore, the DC charging circuit can reuse the motor winding during the charging process of the high-voltage battery. In this way, the current boosting function of the single electric drive high-voltage architecture can be realized, the charging current of the DC charging circuit to the high-voltage battery can be increased, the charging capability of the single electric drive high-voltage architecture can be enhanced, and since the motor winding is reused, there is no need to set up additional inductor components, simplifying the overall vehicle strategy, making the charging strategy of the high-voltage battery more diversified, reducing the complexity and volume of the single electric drive high-voltage architecture, and also reducing the weight and cost of the vehicle.

[0024] In some embodiments, the main control circuit is used to control the motor windings to alternately operate in freewheeling charging mode and buck discharge mode when operating in boost charging mode.

[0025] In the technical solution of this application embodiment, the current output by the DC charging circuit can be controlled to continue through the motor winding and then connected in series with an externally connected charger (the charger is connected to the DC charging circuit) to form a BUCK step-down circuit, forming a continuous charging condition. Then, the upper arm of the bridge inverter circuit is controlled to turn off, and the main control circuit controls the motor winding to work alternately in the continuous charging condition and the step-down discharge condition. Thus, in the boost charging mode, the DC charging circuit reuses the motor winding to boost the charging of the high-voltage battery, realizing the multiple functional requirements of the vehicle's high-voltage battery and solving the problem of the battery charging circuit and motor drive circuit being independent and resulting in single function in related technologies.

[0026] In some embodiments, when the main control circuit controls the motor winding to operate in the freewheeling charging mode, it controls the first switching circuit, the main negative switching circuit, and the winding switching circuit to turn off, and controls the DC power output by the DC charging circuit to form a charging circuit through the second switching circuit, the bridge inverter circuit, the motor winding, the anti-reverse circuit, the main positive switching circuit, the high voltage battery, and the direct charging negative switch circuit to provide freewheeling power to the motor winding.

[0027] In the technical solution of this application embodiment, the current output by the DC charging circuit can be controlled to form a charging circuit through a second switching circuit, a bridge inverter circuit, a motor winding, an anti-reverse circuit, a main positive switching circuit, a high-voltage battery, and a direct charging negative switch circuit. This charging circuit includes an externally connected charger (the charger is connected to the DC charging circuit). In this way, a BUCK step-down circuit can be formed in series to form a freewheeling charging condition. Then, the upper bridge arm of the bridge inverter circuit is controlled to turn off, and the main control circuit controls the motor winding to work alternately in the freewheeling charging condition and the step-down discharging condition. Thus, in the boost charging mode, the DC charging circuit reuses the motor winding to boost charge the high-voltage battery, realizing 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.

[0028] In some embodiments, when the main control circuit controls the motor winding to operate in the step-down discharge mode, it controls the first switch circuit, the second switch circuit, and the winding switch circuit to turn off, and controls the motor winding to charge the high-voltage battery through a discharge circuit composed of the anti-reverse circuit, the main positive switch circuit, the high-voltage battery, the direct charging negative switch circuit, and the bridge inverter circuit.

[0029] In the technical solution of this application embodiment, the current output by the DC charging circuit is controlled to continue flowing through the motor windings and then connected in series with an externally connected charger (the charger is connected to the DC charging circuit) to form a BUCK step-down circuit, thus forming a continuous charging condition. Then, the upper arm of the bridge inverter circuit is controlled to turn off, and the first switch circuit, the second switch circuit, and the winding switch circuit are controlled to turn off. The motor windings are controlled to form a discharge circuit 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. The main control circuit can control the motor windings to work alternately in the continuous charging condition and the step-down discharge condition. Thus, in the boost charging mode, the DC charging circuit reuses the motor windings to boost the current of the high-voltage battery, realizing the multiple functional requirements of the vehicle's high-voltage battery and solving the problem of the battery charging circuit and the motor drive circuit being independent and resulting in a single function in the related technology.

[0030] In some embodiments, the single-electric-drive high-voltage architecture further includes:

[0031] The third switching circuit is connected between the positive terminal of the DC charging circuit and the electric drive neutral line of the motor winding.

[0032] In the technical solution of this application embodiment, by setting a third switching circuit between the positive terminal of the DC charging circuit and the electric drive neutral line of the motor winding, a current path can be provided between the positive terminal of the DC charging circuit and the electric drive center line of the motor winding. The main control circuit can control the switching state of the third switching circuit so that the motor winding freewheeling current is connected in series with the charger to form a BOOST boost circuit, providing a boost charging mode for the single electric drive high-voltage architecture. In the boost charging mode, the DC charging circuit reuses the motor winding to boost charge the high-voltage battery, realizing the multiple functional requirements of the vehicle's high-voltage battery, and solving the problem of the battery charging circuit and motor drive circuit being independent and resulting in single function in related technologies.

[0033] In some embodiments, the main control circuit is used to control the motor windings to alternately operate in boost freewheeling mode and boost discharge mode when operating in boost charging mode.

[0034] In the technical solution of this application embodiment, by setting a third switching circuit between the positive terminal of the DC charging circuit and the electric drive neutral line of the motor winding, a current path can be provided between the positive terminal of the DC charging circuit and the electric drive center line of the motor winding. The main control circuit can control the switching state of the third switching circuit so that the motor winding freewheeling current is connected in series with the charger to form a BOOST boost circuit. When the single electric drive high-voltage architecture works in boost charging mode, the main control circuit controls the main positive switching circuit, the main negative switching circuit, the anti-reverse circuit, the bridge inverter circuit, and the motor winding to work alternately in boost freewheeling mode and boost discharging mode. In boost charging mode, the DC charging circuit reuses the motor winding to boost charge the high-voltage battery, realizing the multiple functional requirements of the vehicle's high-voltage battery, and solving the problem of the battery charging circuit and the motor drive circuit being independent and resulting in single function in related technologies.

[0035] In some embodiments, when the main control circuit controls the motor winding to operate in the boost freewheeling mode, it controls the direct charging positive switch circuit, the main positive switch circuit, and the winding switch circuit to turn off, and controls the DC power output by the DC charging circuit to form a charging circuit 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 provide freewheeling current to the motor winding.

[0036] In the technical solution of this application embodiment, the third switching circuit is disposed between the positive terminal of the DC charging circuit and the electric drive neutral line of the motor winding. It can provide a current path between the positive terminal of the DC charging circuit and the electric drive center line of the motor winding. The main control circuit can control the switching state of the third switching circuit so that the motor winding freewheeling current is connected in series with the charger to form a BOOST boost circuit. The main control circuit controls the direct charging positive terminal switching circuit, the main positive switching circuit, and the winding switching circuit to turn off, and controls the DC power output by the DC charging circuit to pass through the third switching circuit, the motor winding, and the bridge. The charging circuit consists of a inverter circuit, a main negative switch circuit, and a direct charging negative switch circuit, which enables the motor windings to operate in boost freewheeling mode. The main control circuit controls the main positive switch circuit, the main negative switch circuit, the anti-reverse circuit, the bridge inverter circuit, and the motor windings to alternately operate in boost freewheeling mode and boost discharging mode. In boost charging mode, the high-voltage battery is boosted and charged by the motor windings through the DC charging circuit, realizing the multiple functional requirements of the vehicle's high-voltage battery. This solves the problem of the battery charging circuit and the motor drive circuit being independent and resulting in single function in related technologies.

[0037] In some embodiments, when the main control circuit controls the motor winding to operate in the boost discharge mode, it controls the direct charging positive switch circuit, the main negative switch circuit and the winding switch circuit to turn off, and controls the motor winding to charge the high-voltage battery through the discharge circuit composed of the bridge inverter circuit, the main positive switch circuit, the high-voltage battery, the direct charging negative switch circuit, the DC charging circuit and the third switch circuit.

[0038] In the technical solution of this application embodiment, the main control circuit controls the direct charging positive switch circuit, the main negative switch circuit, and the winding switch circuit to turn off, and controls the motor winding to discharge through the bridge inverter circuit, the main positive switch circuit, the high-voltage battery, the direct charging negative switch circuit, the DC charging circuit, and the third switch circuit, so that the motor winding works in the boost discharge condition. The main control circuit controls the main positive switch circuit, the main negative switch circuit, the anti-reverse circuit, the bridge inverter circuit, and the motor winding to work alternately in the boost freewheeling condition and the boost discharge condition. In the boost charging mode, the DC charging circuit reuses the motor winding to boost charge the high-voltage battery, realizing the multiple functional requirements of the vehicle's high-voltage battery, and solving the problem of the battery charging circuit and the motor drive circuit being independent and resulting in single function in related technologies.

[0039] In some embodiments, the main control circuit is used to control the motor windings to alternately operate in self-heating freewheeling mode and self-heating discharge mode when operating in self-heating mode.

[0040] In the technical solution of this application embodiment, the main control circuit can control the bridge inverter circuit, the main positive switch circuit, the main negative switch circuit, and the winding switch circuit to enable the first battery, the second battery, and the motor winding to mutually store and discharge energy. In the self-heating mode, the motor winding is controlled to alternately work in the self-heating freewheeling mode and the self-heating discharge mode by reusing the motor winding. Thus, the self-heating function is achieved by relying on the internal resistance of the first battery and the second battery, realizing the multiple functional requirements of the vehicle's high-voltage battery. This solves the problem of the battery charging circuit and the motor drive circuit being independent and resulting in a single function in the related technology.

[0041] In some embodiments, when the main control circuit controls the motor winding to operate in the self-heating freewheeling mode, it controls the direct charging positive switch circuit, the direct charging negative switch circuit, and the main negative switch circuit to turn off, and controls the DC power output from the first battery to form a charging circuit through the main positive switch circuit, the bridge inverter circuit, the motor winding, and the winding switch circuit to provide freewheeling current to the motor winding.

[0042] In the technical solution of this application embodiment, the main control circuit can control the bridge inverter circuit, the main positive switch circuit, the main negative switch circuit, and the winding switch circuit to enable the first battery, the second battery, and the motor winding to mutually store and discharge energy. In the self-heating mode, the motor winding is controlled to alternately work in the self-heating freewheeling mode and the self-heating discharge mode by reusing the motor winding. The main control circuit can control the DC power output from the first battery to form a charging circuit through the main positive switch circuit, the bridge inverter circuit, the motor winding, and the winding switch circuit to provide freewheeling current to the motor winding. Then, the motor winding is controlled to discharge, thereby achieving the self-heating function by relying on the internal resistance of the first battery and the second battery. This fulfills the multiple functional requirements of the vehicle's high-voltage battery and solves the problem of the battery charging circuit and the motor drive circuit being independent and resulting in a single function in related technologies.

[0043] In some embodiments, when the main control circuit controls the motor winding to operate in the self-heating discharge mode, it controls the direct charging positive switch circuit, the direct charging negative switch circuit, and the main positive switch circuit to turn off, and controls the motor winding to heat the second battery through the discharge circuit composed of the winding switch circuit, the second battery, the main negative switch circuit, and the bridge inverter circuit.

[0044] In the technical solution of this application embodiment, the main control circuit can control the bridge inverter circuit, the main positive switch circuit, the main negative switch circuit, and the winding switch circuit to enable the first battery, the second battery, and the motor winding to mutually store and discharge energy. In the self-heating mode, the motor winding is controlled to alternately operate in the self-heating freewheeling mode and the self-heating discharge mode by reusing the motor winding. The main control circuit can control the direct charging positive switch circuit, the direct charging negative switch circuit, and the main positive switch circuit to turn off, and control the motor winding to heat the second battery through the discharge circuit composed of the winding switch circuit, the second battery, the main negative switch circuit, and the bridge inverter circuit. Thus, the self-heating function is achieved by relying on the internal resistance of the first battery and the second battery, realizing the multiple functional requirements of the vehicle's high-voltage battery, and solving the problem of the battery charging circuit and the motor drive circuit being independent and resulting in single function in related technologies.

[0045] In some embodiments, the single-electric-drive high-voltage architecture further includes:

[0046] The pre-charge switch circuit is connected in parallel with the main positive switch circuit.

[0047] In the technical solution of this application embodiment, by setting the pre-charge switch circuit and the main positive switch circuit in parallel, the high-voltage battery can be pre-charged through the pre-charge switch circuit before formal charging, thereby realizing the multiple functional requirements of the vehicle's high-voltage battery.

[0048] In some embodiments, the single-electric-drive high-voltage architecture further includes:

[0049] The on-board charging circuit, connected to the main positive switch circuit and the main negative switch circuit, is used to charge the high-voltage battery under the control of the main control circuit.

[0050] In the technical solution of this application embodiment, the on-board charging circuit is controlled by the main control circuit. It can charge the high-voltage battery through the main positive switch circuit and the main negative switch circuit. It can also use the on-board charging circuit to reuse the bridge inverter circuit and the motor winding to realize the multiple functional requirements of the vehicle's high-voltage battery. This solves the problem that the battery charging circuit and the motor drive circuit are independent of each other in the related technology, resulting in a single function.

[0051] A third aspect of this application also provides a vehicle, including: a single electric drive high-voltage architecture as described in any of the above embodiments.

[0052] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Beneficial effects

[0053] In the technical solution of this application embodiment, the vehicle includes a high-voltage battery. A main 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. This allows the high-voltage battery to supply power to the bridge inverter circuit via the main positive and main negative switch circuits. The bridge inverter circuit then outputs a corresponding current to the motor windings, thereby driving the motor. Furthermore, by controlling the switching states of the main positive switch circuit, the main negative switch circuit, the winding switch circuit, and the bridge inverter circuit, the main control circuit can reuse external high-voltage loads and motor windings to allow the external charging circuit to select the appropriate charging mode to charge the high-voltage battery. It can also reuse the motor windings to achieve the battery's self-heating function. Thus, by controlling the switching states of each switch circuit, multiple functional requirements of the vehicle can be met, solving the problem of single-function batteries caused by independent battery charging circuits and motor drive circuits in related technologies. Attached Figure Description

[0054] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0055] Figure 1 is a schematic diagram of a first type of single-electric-drive high-voltage architecture provided in an embodiment of this application;

[0056] Figure 2a is a second schematic diagram of a single electric drive high-voltage architecture provided in an embodiment of this application;

[0057] Figure 2b is a schematic diagram of the current when the single electric drive high voltage architecture provided in the embodiment of this application is working in DC fast charging mode;

[0058] Figure 3 is a third schematic diagram of the single electric drive high-voltage architecture provided in the embodiments of this application;

[0059] Figure 4a is a fourth schematic diagram of a single electric drive high-voltage architecture provided in an embodiment of this application;

[0060] Figures 4b and 4c are schematic diagrams of the current when the single electric drive high voltage architecture provided in the embodiment of this application is operating in the current boost charging mode.

[0061] Figure 5a is a fifth schematic diagram of a single electric drive high-voltage architecture provided in an embodiment of this application;

[0062] Figures 5b and 5c are schematic diagrams of the current when the single electric drive high voltage architecture provided in the embodiment of this application is working in boost charging mode.

[0063] Figures 5d and 5e are schematic diagrams of the current when the single electric drive high voltage architecture provided in the embodiment of this application is working in self-heating mode;

[0064] Figure 6 is a sixth schematic diagram of a single electric drive high-voltage architecture provided in the embodiments of this application;

[0065] Figure 7 is a seventh schematic diagram of a single electric drive high-voltage architecture provided in the embodiments of this application;

[0066] Figure 8 is an eighth schematic diagram of a single electric drive high-voltage architecture provided in the embodiments of this application. Embodiments of the present invention

[0067] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0068] 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 this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0069] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0070] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The phrase "second connection port" at various locations in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0071] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0072] In related technologies, the battery charging circuit and the motor drive circuit in electric vehicles are separate. The two circuits do not interfere with each other and are independent of each other. This not only requires a more complex circuit structure, but also has the problem of limited functionality.

[0073] To address the aforementioned technical problems, this application provides a single-electric-drive high-voltage architecture, as shown in Figure 1. The single-electric-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. 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 via the winding switch circuit 230. The positive terminal of the high-voltage battery is connected to the first terminal of the bridge inverter circuit 310 via the main positive switch circuit 210, and the negative terminal of the high-voltage battery is connected to the second terminal of the bridge inverter circuit 310 via the main negative switch circuit 220. 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.

[0074] 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.

[0075] In some embodiments, the first battery 110 may be a battery pack, which may include multiple battery cells.

[0076] In some embodiments, the second battery 120 may be a battery pack, which may include multiple battery cells.

[0077] In some embodiments, the voltages of the first battery 110 and the second battery 120 may be the same.

[0078] In some embodiments, the voltage range of the first battery 110 and the second battery 120 can be 100V-1200V.

[0079] 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.

[0080] In some embodiments, the first battery 110 and the second battery 120 may be lithium batteries.

[0081] In some embodiments, referring to FIG2a, the single-electric-drive high-voltage architecture further includes: a DC charging circuit 400, a direct-charge positive switch circuit 410, and a direct-charge 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-charge 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-charge negative switch circuit 420.

[0082] In this embodiment, the positive terminal of the DC charging circuit 400 is connected to the positive terminal of the high-voltage battery via a direct charging positive terminal 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 a direct charging negative terminal switch circuit 420, thus enabling charging of the high-voltage battery. Furthermore, the main control circuit 800 controls the switching states of the main positive switch circuit 210, the main negative switch circuit 220, the direct charging positive terminal switch circuit 410, the direct charging negative terminal switch circuit 420, the winding switch circuit 230, and the bridge inverter circuit 310. This allows charging of the high-voltage battery in DC fast charging mode. It also allows the DC charging circuit 400 to select either a boost charging mode or a boost charging mode for charging the high-voltage battery by reusing the motor winding 320. Furthermore, the motor winding 320 can be reused to achieve a self-heating function for the battery. By controlling the switching states of each switch circuit through the main control circuit 800, multiple functional requirements of the vehicle's high-voltage battery are met, solving the problem of single functionality caused by the independent operation of the battery charging circuit and the motor drive circuit in related technologies.

[0083] In some embodiments, the main control circuit 800 is used to control the main positive switch circuit 210, the main negative switch circuit 220 and the winding switch circuit 230 to turn off when operating in DC fast charging mode, and to control the DC charging circuit 400 to charge the high-voltage battery through the direct charging positive switch circuit 410 and the direct charging negative switch circuit 420.

[0084] In this embodiment of the application, as shown in Figure 2b, 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 turn off, while the direct charging positive switch circuit 410 and the direct charging negative switch circuit 420 are turned on. This controls the DC charging circuit 400 to charge the high-voltage battery through the direct charging positive switch circuit 410 and the direct charging negative switch circuit 420, which enables the single-electric drive high-voltage architecture to work in DC fast charging mode, realizing the rapid charging of the high-voltage battery by the DC charging circuit 400.

[0085] In some embodiments, as shown in FIG3, the single electric drive high voltage architecture further includes: an anti-reverse circuit 510, which is connected between the electric drive neutral line of the motor winding 320 and the main positive switch circuit 210. The anti-reverse circuit 510 is used to prevent the output current of the main positive switch circuit 210 from flowing back into the motor winding 320.

[0086] In this embodiment, by setting an 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. This allows the DC charging circuit 400 to reuse the motor winding 320 during the charging of the high-voltage battery, thereby realizing the boost charging function of the single electric drive high-voltage architecture, increasing the charging current of the DC charging circuit 400 to the high-voltage battery, enhancing the charging capability of the single electric drive high-voltage architecture, and reducing the complexity and size of the single electric drive high-voltage architecture due to the reuse of the motor winding 320.

[0087] In some embodiments, referring to FIG4a, the single-electric-drive high-voltage architecture further includes: a first switching circuit 610 and a second switching circuit 620. The first switching circuit 610 is connected between the bridge inverter circuit 310 and the main positive switching circuit 210; the second switching circuit 620 is connected between the common node of the first switching circuit 610 and the bridge inverter circuit 310 and the positive terminal of the DC charging circuit 400; the switching states of the first switching circuit 610 and the second switching circuit 620 are controlled by the main control circuit 800.

[0088] In this embodiment, by setting a first switching circuit 610 and a second circuit between the DC charging circuit 400 and the main positive switching circuit 210, and by setting an anti-reverse circuit 510 between the electric drive neutral line of the motor winding 320 and the main positive switching circuit 210, the current path of the DC output of the DC charging circuit 400 can be flexibly controlled, allowing the motor winding 320 to freewheel and discharge in different current paths. Furthermore, 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 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 increased, the charging capability of the single electric drive high-voltage architecture can be enhanced, and since the motor winding 320 is reused, there is no need to set up additional inductor components, simplifying the overall vehicle strategy, making the charging strategy of the high-voltage battery more diversified, reducing the complexity and volume of the single electric drive high-voltage architecture, and also reducing the weight and cost of the vehicle.

[0089] In some embodiments, the main control circuit 800 is used to control the motor winding 320 to alternately operate in the freewheeling charging mode and the buck discharge mode when operating in the boost charging mode.

[0090] In this embodiment, the current output by the DC charging circuit 400 can be controlled to freewheel through the motor winding 320 and then connected in series with an externally connected charger (connected to the DC charging circuit 400) to form a BUCK step-down circuit, thus forming a freewheeling charging condition. Then, the upper arm of the bridge inverter circuit 310 is controlled to turn off, and the main control circuit 800 controls the motor winding 320 to alternately operate in the freewheeling charging condition and the step-down discharging condition. Thus, in the boost charging mode, the DC charging circuit 400 reuses the motor winding 320 to boost charge the high-voltage battery, realizing multiple functional requirements of the vehicle's high-voltage battery and solving the problem of the battery charging circuit and motor drive circuit being independent and resulting in single function in related technologies.

[0091] In some embodiments, as shown in FIG4b, when the main control circuit 800 controls the motor winding 320 to operate in the freewheeling charging mode, it controls the first switch circuit 610, the main negative switch circuit 220 and the winding switch circuit 230 to be turned off, and controls the DC power output by the DC charging circuit 400 to form a charging circuit 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 provide freewheeling current to the motor winding 320.

[0092] In this embodiment, the main control circuit 800 can control the upper arm of the bridge inverter circuit 310 to be turned on and the lower arm of the bridge inverter circuit 310 to be turned off, while the second switching circuit 620, the anti-reverse circuit 510, and the direct charging negative switch circuit 420 are turned on. The current output from the DC charging circuit 400 can be controlled to form a charging circuit via the second switching 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. This charging circuit includes an externally connected charger (charging...). (The motor is connected to the DC charging circuit 400), thus forming a BUCK step-down circuit in series to achieve a freewheeling charging mode. Then, the upper arm of the bridge inverter circuit 310 is turned off, and the main control circuit 800 controls the motor winding 320 to alternately operate in the freewheeling charging mode and the step-down discharging mode. In the boost charging mode, the DC charging circuit 400 reuses the motor winding 320 to boost charge the high-voltage battery, realizing the multiple functional requirements of the vehicle's high-voltage battery and solving the problem of the battery charging circuit and motor drive circuit being independent and resulting in a single function in related technologies.

[0093] In some embodiments, as shown in FIG4c, when the main control circuit 800 controls the motor winding 320 to operate in the step-down discharge condition, it controls the first switch circuit 610, the second switch circuit 620 and the winding switch circuit 230 to turn off, and controls the motor winding 320 to charge the high-voltage battery through the discharge circuit formed by 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.

[0094] In this embodiment, the current output by the DC charging circuit 400 is controlled to continue through the motor winding 320 and then connected in series with an externally connected charger (connected to the DC charging circuit 400) to form a BUCK step-down circuit, thus forming a continuous charging condition. Then, the upper arm of the bridge inverter circuit 310 is controlled to turn off, and the first switch circuit 610, the second switch circuit 620, and the winding switch circuit 230 are controlled to turn off. The motor winding 320 is controlled to form a discharge circuit 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 to charge the high-voltage battery. The main control circuit 800 can control the motor winding 320 to alternately work in the continuous charging condition and the step-down discharge condition. Thus, in the boost charging mode, the DC charging circuit 400 reuses the motor winding 320 to boost the current of the high-voltage battery, realizing the multiple functional requirements of the vehicle's high-voltage battery and solving the problem of the battery charging circuit and the motor drive circuit being independent and resulting in a single function in related technologies.

[0095] In some embodiments, referring to FIG5a, the single electric drive high voltage architecture further includes a third switching circuit 630, which is connected between the positive terminal of the DC charging circuit 400 and the electric drive neutral line of the motor winding 320.

[0096] In this embodiment, by setting a third switching circuit 630 between the positive terminal of the DC charging circuit 400 and the electric drive neutral line of the motor winding 320, a current path can be provided between the positive terminal of the DC charging circuit 400 and the electric drive center line of the motor winding 320. The main control circuit 800 can control the switching state of the third switching circuit 630 so that the motor winding 320, after freewheeling, is connected in series with the charger to form a BOOST boost circuit, providing a boost charging mode for the single electric drive high-voltage architecture. In the boost charging mode, the DC charging circuit 400 reuses the motor winding 320 to boost charge the high-voltage battery, realizing multiple functional requirements of the vehicle's high-voltage battery, and solving the problem of the battery charging circuit and motor drive circuit being independent and resulting in single function in related technologies.

[0097] In some embodiments, the main control circuit 800 is used to control the motor winding 320 to alternately operate in boost freewheeling mode and boost discharge mode when operating in boost charging mode.

[0098] In this embodiment, by setting a third switching circuit 630 between the positive terminal of the DC charging circuit 400 and the electric drive neutral line of the motor winding 320, a current path can be provided between the positive terminal of the DC charging circuit 400 and the electric drive center line of the motor winding 320. The main control circuit 800 can control the switching state of the third switching circuit 630 so that the motor winding 320, after freewheeling, is connected in series with the charger to form a BOOST boost circuit. When the single electric drive high-voltage architecture is working in boost charging mode, the main control circuit 800 controls the main positive switching circuit 210, the main negative switching circuit 220, the anti-reverse circuit 510, the bridge inverter circuit 310, and the motor winding 320 to work alternately in boost freewheeling mode and boost discharging mode. In boost charging mode, the DC charging circuit 400 reuses the motor winding 320 to boost charge the high-voltage battery, realizing the multiple functional requirements of the vehicle's high-voltage battery and solving the problem of the battery charging circuit and motor drive circuit being independent and resulting in single function in related technologies.

[0099] In some embodiments, as shown in FIG5b, when the main control circuit 800 controls the motor winding 320 to operate in the boost freewheeling mode, it controls the direct charging positive switch circuit 410, the main positive switch circuit 210, and the winding switch circuit 230 to be turned off, and controls the DC power output by the DC charging circuit 400 to form a charging circuit 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 switch circuit 420 to provide freewheeling current to the motor winding 320.

[0100] In this embodiment, the third switch circuit 630 is located between the positive terminal of the DC charging circuit 400 and the electric drive neutral line of the motor winding 320. It provides a current path between the positive terminal of the DC charging circuit 400 and the electric drive center line of the motor winding 320. The main control circuit 800 can control the switching state of the third switch circuit 630 to allow the motor winding 320 to continue flowing and form a BOOST boost circuit in series with the charger. The main control circuit 800 controls the direct charging positive terminal switch circuit 410, the main positive switch circuit 210, and the winding switch circuit 230 to turn off, and controls the DC power output from the DC charging circuit 400 to pass through the third switch circuit 630 and the motor winding 320. The charging circuit consists of a bridge inverter circuit 310, a main negative switch circuit 220, and a direct charging negative switch circuit 420, which enables the motor winding 320 to operate in boost freewheeling mode. The main control circuit 800 controls 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 to alternately operate in boost freewheeling mode and boost discharging mode. In boost charging mode, the DC charging circuit 400 reuses the motor winding 320 to boost charge the high-voltage battery, realizing the multiple functional requirements of the vehicle's high-voltage battery and solving the problem of the battery charging circuit and motor drive circuit being independent and resulting in single function in related technologies.

[0101] In some embodiments, as shown in FIG5c, when the main control circuit 800 controls the motor winding 320 to operate in the boost discharge condition, it controls the direct charging positive switch circuit 410, the main negative switch circuit 220 and the winding switch circuit 230 to turn off, and controls the motor winding 320 to charge the high-voltage battery through the discharge circuit composed of the bridge inverter circuit 310, the main positive switch circuit 210, the high-voltage battery, the direct charging negative switch circuit 420, the DC charging circuit 400 and the third switch circuit 630.

[0102] In this embodiment, the main control circuit 800 controls the direct charging positive switch circuit 410, the main negative switch circuit 220, and the winding switch circuit 230 to turn off, and controls the motor winding 320 to operate in a discharge circuit composed of the bridge inverter circuit 310, the main positive switch circuit 210, the high-voltage battery, the direct charging negative switch circuit 420, the DC charging circuit 400, and the third switch circuit 630. This allows the motor winding 320 to operate in a boost discharge mode. The main control circuit 800 controls 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 to alternately operate in boost freewheeling mode and boost discharge mode. In boost charging mode, the DC charging circuit 400 reuses the motor winding 320 to boost charge the high-voltage battery, realizing the multiple functional requirements of the vehicle's high-voltage battery and solving the problem of the battery charging circuit and motor drive circuit being independent and resulting in single function in related technologies.

[0103] In some embodiments, the main control circuit 800 is used to control the motor winding 320 to alternately operate in self-heating continuous current mode and self-heating discharge mode when operating in self-heating mode.

[0104] In the technical solution of this application embodiment, 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 mutually store and discharge energy from 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 mode and the self-heating discharge mode by reusing the motor winding 320. Thus, the self-heating function is achieved by relying on the internal resistance of the first battery 110 and the second battery 120, realizing the multiple functional requirements of the vehicle's high-voltage battery, and solving the problem of the battery charging circuit and the motor drive circuit being independent and resulting in a single function in the related technology.

[0105] In some embodiments, as shown in FIG5d, when the main control circuit 800 controls the motor winding 320 to operate in the self-heating freewheeling mode, it 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 DC power output by the first battery 110 to form a charging circuit through the main positive switch circuit 210, the bridge inverter circuit 310, the motor winding 320, and the winding switch circuit 230 to provide freewheeling current to the motor winding 320.

[0106] In this embodiment, 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 allow the first battery 110, the second battery 120, and the motor winding 320 to mutually store and discharge energy. In self-heating mode, the motor winding 320 is controlled to alternately operate in self-heating freewheeling mode and self-heating discharge mode by reusing the motor winding 320. The main control circuit 800 can control the DC power output from the first battery 110 to form a charging circuit through the main positive switch circuit 210, the bridge inverter circuit 310, the motor winding 320, and the winding switch circuit 230 to provide freewheeling current to the motor winding 320. Then, the main control circuit 800 controls the motor winding 320 to discharge, thereby achieving the self-heating function by relying on the internal resistance of the first battery 110 and the second battery 120. This fulfills the multiple functional requirements of the vehicle's high-voltage battery and solves the problem of the battery charging circuit and motor drive circuit being independent and resulting in single function in related technologies.

[0107] In some embodiments, as shown in FIG5e, when the main control circuit 800 controls the motor winding 320 to operate in the self-heating discharge mode, it controls the direct charging positive switch circuit 410, the direct charging negative switch circuit 420 and the main positive switch circuit 210 to turn off, and controls the motor winding 320 to heat the second battery 120 through the discharge circuit composed of the winding switch circuit 230, the second battery 120, the main negative switch circuit 220 and the bridge inverter circuit 310.

[0108] In this embodiment, 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 allow the first battery 110, the second battery 120, and the motor winding 320 to mutually store and discharge energy. In self-heating mode, the motor winding 320 is controlled to alternately operate in self-heating freewheeling mode and self-heating discharge mode by reusing the motor winding 320. The main control circuit 800 can also control the direct charging positive switch circuit 410 and the direct charging negative switch circuit 230. The polarity switch circuit 420 and the main positive switch circuit 210 are turned off, and the motor winding 320 is controlled to heat the second battery 120 through the discharge circuit composed of the winding switch circuit 230, the second battery 120, the main negative switch circuit 220, and the bridge inverter circuit 310. This heats the second battery 120, thereby achieving self-heating function by relying on the internal resistance of the first battery 110 and the second battery 120. This fulfills the multiple functional requirements of the vehicle's high-voltage battery and solves the problem of the battery charging circuit and motor drive circuit being independent and resulting in single function in related technologies.

[0109] In some embodiments, as shown in FIG6, the single electric drive high voltage architecture further includes a precharge switch circuit 710, which is connected in parallel with the main positive switch circuit 210.

[0110] In this embodiment, by setting the pre-charge switch circuit 710 and the main positive switch circuit 210 in parallel, the high-voltage battery can be pre-charged through the pre-charge switch circuit 710 before formal charging, thereby fulfilling the various functional requirements of the vehicle's high-voltage battery.

[0111] In some embodiments, as shown in FIG7, the single electric drive high-voltage architecture further includes: an on-board charging circuit 720, which is connected to the main positive switch circuit 210 and the main negative switch circuit 220, and is controlled by the main control circuit 800 to charge the high-voltage battery.

[0112] 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.

[0113] In some embodiments, as shown in FIG8, the main positive switch circuit 210 includes a main positive relay K1, the two ends of which are connected to the positive terminal of the high voltage battery and the positive terminal of the on-board charging circuit 720, respectively.

[0114] In some embodiments, as shown in FIG8, 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.

[0115] In some embodiments, as shown in FIG8, 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.

[0116] In some embodiments, as shown in FIG8, the direct charging positive switch circuit 410 includes a direct charging positive relay Kc1, the two ends of which are connected to the positive terminal of the DC charging circuit 400 and the positive terminal of the high-voltage battery, respectively.

[0117] In some embodiments, as shown in FIG8, the direct charging negative switch circuit 420 includes a direct charging negative relay Kc2, the two ends of which are connected to the negative terminal of the DC charging circuit 400 and the negative terminal of the high-voltage battery, respectively.

[0118] In some embodiments, as shown in FIG8, 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 respectively connected to the main negative switch circuit 220 and the negative terminal of the high voltage battery.

[0119] In some embodiments, as shown in FIG8, the first switching circuit 610 includes a first relay Ku1, which is connected in series with the main positive switching circuit 210.

[0120] In some embodiments, as shown in FIG8, the second switching circuit 620 includes a second relay Ku2, the two ends of which are respectively connected to the first relay Ku1 and the positive terminal of the DC charging circuit 400.

[0121] In some embodiments, as shown in FIG8, the third switching circuit 630 includes a third relay Ku3, the two ends of which are connected to the neutral line of the motor winding 320 and the positive terminal of the DC charging circuit 400, respectively.

[0122] In some embodiments, the switching states of the first relay Ku1, the second relay Ku2, and the third relay Ku3 are controlled by the main control circuit 800.

[0123] In some embodiments, as shown in FIG8, a second fuse F2 is provided between the positive terminal of the on-board charging circuit 720 and the second switching circuit 620, and the two ends of the second fuse F2 are respectively connected to the positive terminal of the on-board charging circuit 720 and the second switching circuit 620.

[0124] In some embodiments, referring to FIG8, the bridge inverter circuit 310 includes 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, and a third lower bridge arm Q32. The motor winding 320 includes a first winding L1, a second winding L2, and a third winding L3. The first upper bridge arm Q11 and the first lower bridge arm Q12 form a half-bridge circuit. The common node of the first upper bridge arm Q11 and the first lower bridge arm Q12 is connected to the first winding L1. The first end, the second upper bridge arm Q21 and the second lower bridge arm Q22 form a half-bridge circuit. The common node of the second upper bridge arm Q21 and the second lower bridge arm Q22 is connected to the first end of the second winding L2. The third upper bridge arm Q31 and the third lower bridge arm Q32 form a half-bridge circuit. The common node of the third upper bridge arm Q31 and the third lower bridge arm Q32 is connected to the first end of the third winding L3. The second ends of the first winding L1, the second winding L2 and the third winding L3 are connected to the neutral line of the motor winding 320.

[0125] In some embodiments, the switching 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 main control circuit 800.

[0126] 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 transistor, a MOSFET, or an IGBT.

[0127] In some embodiments, as shown in FIG8, an integrated active and passive fuse F3 is provided between the neutral line of the motor winding 320 and the winding switch circuit 230 to prevent the problem of excessive discharge current of the motor winding 320 causing damage to the battery or components in the current boost charging mode.

[0128] In some embodiments, as shown in FIG8, the anti-reverse circuit 510 includes a first diode D1 and a first switch Ks1 connected in series. The cathode of the first diode D1 is connected to the main positive switch circuit 210 via the first switch Ks1, and the anode of the first diode D1 is connected to the neutral line of the motor winding 320.

[0129] In this embodiment, the switching state of the first switch Ks1 is controlled by the main control circuit 800, which can provide a corresponding current path between the neutral line of the motor winding 320 and the main positive switch circuit 210. In addition, it 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 high-voltage battery from short-circuiting. By controlling the switching state of each switch circuit through the main control circuit 800, multiple functional requirements of the vehicle can be realized, which solves the problem of the battery charging circuit and the motor drive circuit being independent and resulting in single function in related technologies.

[0130] In some embodiments, as shown in FIG8, a second switch Ks2 and a first capacitor C1 are connected between the common node of the second switch circuit 620 and the third switch circuit 630 and the negative terminal of the high-voltage battery, and the second switch Ks2 and the first capacitor C1 are connected in series.

[0131] In this embodiment, the switching state of the second switch Ks2 is controlled by the main control circuit 800, which can provide a current path between the second switch circuit 620 and the negative terminal of the high-voltage battery, and also provide a current path between the third switch circuit 630 and the negative terminal of the high-voltage battery. Thus, by controlling the switching state of each switch circuit, the vehicle's multiple functional requirements can be achieved, solving the problem of the battery charging circuit and motor drive circuit being independent and resulting in single function in related technologies.

[0132] This application also provides a vehicle, including: a single electric drive high-voltage architecture as described in any of the above embodiments.

[0133] In this embodiment, the vehicle includes a high-voltage battery. A 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 high-voltage battery to supply power to the bridge inverter circuit 310 via the main positive and negative switch circuits 210 and 220. The bridge inverter circuit 310 then outputs a corresponding current to the motor windings 320, thereby driving the motor. Furthermore, by controlling 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, the main control circuit 800 can reuse the external high-voltage load and the motor windings 320 to allow the external charging circuit to select the appropriate charging mode to charge the high-voltage battery. It can also reuse the motor windings 320 to achieve the battery's self-heating function. By controlling the switching states of each switch circuit, multiple functional requirements of the vehicle can be met, solving the problem of the independent battery charging circuit and motor drive circuit leading to limited functionality in related technologies.

[0134] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0135] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0136] In the embodiments provided in this 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 merely illustrative. For example, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0137] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0138] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0139] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A single-electric-drive high-voltage architecture, wherein, The single-electric-drive high-voltage architecture includes: a first battery, a second battery, a main positive switch circuit, a main negative switch circuit, a winding switch circuit, a bridge inverter circuit, motor windings, and a main control circuit. 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 switching circuit; The positive terminal of the high-voltage battery is connected to the first terminal of the bridge inverter circuit via the main positive switch circuit, and the negative terminal of the high-voltage battery is connected to the second terminal of the bridge inverter circuit via the main negative switch circuit. The operating 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 as described in claim 1, wherein, The single-electric-drive high-voltage architecture also includes: a DC charging circuit, a direct charging positive switch circuit, and a direct charging negative switch circuit. The positive terminal of the DC charging circuit is connected to the positive terminal of the high-voltage battery via the direct charging positive terminal switch circuit, and the negative terminal of the DC charging circuit is connected to the negative terminal of the high-voltage battery via the direct charging negative terminal switch circuit.

3. The single-electric-drive high-voltage architecture as described in claim 2, wherein, The main control circuit is used to control the main positive switch circuit, the main negative switch circuit, and the winding switch circuit to turn off when operating in DC fast charging mode, and to control the DC charging circuit to charge the high-voltage battery through the direct charging positive switch circuit and the direct charging negative switch circuit.

4. The single-electric-drive high-voltage architecture as described in claim 2, wherein, The single-electric-drive high-voltage architecture also includes: An anti-reverse circuit is connected between the electric drive neutral line of the motor winding and the main positive switch circuit to prevent the output current of the main positive switch circuit from flowing back into the motor winding.

5. The single-electric-drive high-voltage architecture as described in claim 4, wherein, The single-electric-drive high-voltage architecture also includes: The first switching circuit is connected between the bridge inverter circuit and the main positive switching circuit; The second switching circuit is connected between the common node of the first switching circuit and the bridge inverter circuit and the positive terminal of the DC charging circuit. The switching states of the first and second switching circuits are controlled by the main control circuit, which provides a current path between the positive terminal of the DC charging circuit and the bridge inverter circuit, and between the positive terminal of the DC charging circuit and the main positive switching circuit.

6. The single-electric-drive high-voltage architecture as described in claim 5, wherein, The main control circuit is used to control the motor windings to alternately operate in freewheeling charging mode and buck discharge mode when operating in boost charging mode.

7. The single-electric-drive high-voltage architecture as described in claim 6, wherein, When the main control circuit controls the motor winding to operate in freewheeling charging mode, it controls the first switching circuit, the main negative switching circuit, and the winding switching circuit to turn off, and controls the DC power output by the DC charging circuit to form a charging circuit through the second switching circuit, the bridge inverter circuit, the motor winding, the anti-reverse circuit, the main positive switching circuit, the high-voltage battery, and the direct charging negative switch circuit to provide freewheeling power to the motor winding.

8. The single-electric-drive high-voltage architecture as described in claim 6, wherein, When the main control circuit controls the motor winding to operate in the step-down discharge mode, it controls the first switch circuit, the second switch circuit, and the winding switch circuit to turn off, and controls the motor winding to charge the high-voltage battery through the discharge circuit formed by the anti-reverse circuit, the main positive switch circuit, the high-voltage battery, the direct charging negative switch circuit, and the bridge inverter circuit.

9. The single-electric-drive high-voltage architecture as described in claim 2, wherein, The single-electric-drive high-voltage architecture also includes: The third switching circuit is connected between the positive terminal of the DC charging circuit and the electric drive neutral line of the motor winding; The third switching circuit is controlled by the main control circuit and is used to provide a current path between the positive terminal of the DC charging circuit and the electric drive neutral line of the motor winding.

10. The single-electric-drive high-voltage architecture as described in claim 9, wherein, The main control circuit is used to control the motor windings to alternately operate in boost charging mode and boost discharge mode when operating in boost charging mode.

11. The single-electric-drive high-voltage architecture as described in claim 10, wherein, When the main control circuit controls the motor winding to operate in boost freewheeling mode, it controls the direct charging positive switch circuit, the main positive switch circuit, and the winding switch circuit to turn off, and controls the DC power output by the DC charging circuit to form a charging circuit 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 provide freewheeling current to the motor winding.

12. The single-electric-drive high-voltage architecture as described in claim 10, wherein, When the main control circuit controls the motor winding to operate in the boost discharge mode, it controls the direct charging positive switch circuit, the main negative switch circuit, and the winding switch circuit to turn off, and controls the motor winding to charge the high-voltage battery through the discharge circuit composed of the bridge inverter circuit, the main positive switch circuit, the high-voltage battery, the direct charging negative switch circuit, the DC charging circuit, and the third switch circuit.

13. The single-electric-drive high-voltage architecture as described in any one of claims 1-12, wherein, The main control circuit is used to control the motor windings to alternately operate in self-heating continuous current mode and self-heating discharge mode when operating in self-heating mode.

14. The single-electric-drive high-voltage architecture as described in claim 13, wherein, When the main control circuit controls the motor winding to work in the self-heating freewheeling mode, it controls the direct charging positive switch circuit, the direct charging negative switch circuit, and the main negative switch circuit to turn off, and controls the DC power output from the first battery to form a charging circuit through the main positive switch circuit, the bridge inverter circuit, the motor winding, and the winding switch circuit to provide freewheeling current to the motor winding.

15. The single-electric-drive high-voltage architecture as described in claim 13, wherein, When the main control circuit controls the motor winding to operate in the self-heating discharge mode, it controls the direct charging positive switch circuit, the direct charging negative switch circuit, and the main positive switch circuit to turn off, and controls the motor winding to heat the second battery through the discharge circuit composed of the winding switch circuit, the second battery, the main negative switch circuit, and the bridge inverter circuit.

16. The single-electric-drive high-voltage architecture as described in any one of claims 1-12, wherein, The single-electric-drive high-voltage architecture also includes: The pre-charge switch circuit is connected in parallel with the main positive switch circuit.

17. The single-electric-drive high-voltage architecture as described in any one of claims 1-12, wherein, The single-electric-drive high-voltage architecture also includes: The on-board charging circuit is connected to the main positive switch circuit and the main negative switch circuit, and is used to charge the high-voltage battery under the control of the main control circuit.

18. A vehicle, wherein, include: The single-electric-drive high-voltage architecture as described in any one of claims 1-17.

Images