Charging driving integrated system and vehicle

Abstract

The invention is suitable for the technical field of vehicles, and provides a charging drive integrated system and a vehicle. The charging driving integrated system comprises a battery unit, a first switching unit, a direct current conversion unit, a power unit, a driving motor and a second switching unit, the direct current conversion unit is electrically connected with the battery unit, the power unit and the first switching unit, and the power unit is electrically connected with the first ends of all windings in the driving motor. The second switching unit is electrically connected with the charging port and the second ends of all windings in the driving motor. Compared with two sets of systems for battery charging and motor driving of a traditional vehicle, the charging and driving integrated system provided by the embodiment of the invention can realize charging of the battery unit and driving of the driving motor, and the battery charging function and the motor driving function can be completed only by using one set of system; the use of electric devices is reduced, the size and weight of the vehicle are reduced, and the effect of reducing the production cost of the vehicle is achieved.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and in particular, relates to a charging drive integrated system and a vehicle. Background Art

[0002] The on-board charging system can make electric vehicles no longer dependent on charging piles, making charging more convenient. After years of development, traditional on-board charging technology has gradually matured, but the driving and charging systems in most electric vehicles currently operate independently of each other. Components such as inverters, motors, and controllers are only used for driving. When the battery cell energy is insufficient, the battery is charged through another on-board charging system. This will cause problems such as increased size, weight, and cost of electric vehicles, as well as low power density levels, and cannot meet the increasing demand for high-power fast charging and low cost. Summary of the invention

[0003] The embodiments of the present application provide a charging and driving integrated system and a vehicle, which can solve the problem that two systems are required for battery charging and motor driving of the vehicle, resulting in increased vehicle costs.

[0004] In a first aspect, an embodiment of the present application provides a charging drive integrated system, including a battery unit, a first switching unit, a DC conversion unit, a power unit, a drive motor, and a second switching unit, wherein the DC conversion unit is electrically connected to the battery unit, the power unit, and the first switching unit, respectively, the power unit is electrically connected to the first ends of all windings in the drive motor, and the second switching unit is electrically connected to the charging port and the second ends of all windings in the drive motor, respectively;

[0005] When the vehicle is in a charging state, the second switching unit switches to a third state, so that the second ends of all windings in the drive motor are connected to the charging port, and the first switching unit switches to a first state, so that the DC conversion unit is connected in series between the power unit and the battery unit, and the charging device charges the battery unit through the charging port, the second switching unit, the drive motor, the power unit and the DC conversion unit;

[0006] When the vehicle is in a driving condition, the second switching unit switches to the fourth state, interconnecting the second ends of all windings in the drive motor, and the first switching unit switches to the second state, bypassing the DC conversion unit, and the battery unit drives the drive motor through the first switching unit and the power unit.

[0007] In a possible implementation manner of the first aspect, the first switching unit includes a first switch, a first end of the first switch is electrically connected to a first end of the DC conversion unit, and a second end of the first switch is electrically connected to a second end of the DC conversion unit;

[0008] When the first switch is disconnected, the DC conversion unit is connected in series between the power unit and the battery unit; when the first switch is closed, the DC conversion unit is bypassed.

[0009] In a possible implementation manner of the first aspect, the second switching unit includes a plurality of first terminals, a plurality of second terminals, and a plurality of third terminals, all of the first terminals are electrically connected to the second ends of all windings in the drive motor in a one-to-one correspondence, all of the second terminals are electrically connected to the charging port, and all of the third terminals are interconnected;

[0010] When the second switching unit is switched to the third state, all the first terminals and all the second terminals are electrically connected in a one-to-one correspondence; when the second switching unit is switched to the fourth state, all the first terminals and all the third terminals are electrically connected in a one-to-one correspondence.

[0011] In a possible implementation manner of the first aspect, the charging drive integrated system further includes a pre-charging unit and a third switching unit, and the third switching unit is electrically connected to the DC conversion unit, the battery unit, and the pre-charging unit respectively;

[0012] When the third switching unit is switched to the fifth state, the battery unit charges the pre-charging unit; when the third switching unit is switched to the sixth state, the pre-charging unit and the battery unit are connected in parallel.

[0013] In a possible implementation of the first aspect, the third switching unit includes a second switch, a third switch and a first resistor, the first end of the second switch is electrically connected to the first end of the first resistor and the positive electrode of the battery unit, respectively, the second end of the first resistor is electrically connected to the first end of the third switch, and the second end of the third switch is electrically connected to the second end of the second switch, the pre-charging unit, the first switching unit and the DC conversion unit, respectively.

[0014] In a possible implementation of the first aspect, the pre-charging unit includes a first capacitor, a first end of the first capacitor is electrically connected to the second end of the second switch and the second end of the third switch, respectively, and a second end of the first capacitor is electrically connected to the negative electrode of the battery cell.

[0015] In a possible implementation manner of the first aspect, the charging drive integrated system further includes a filtering unit, which is connected in series between the second switching unit and the charging port; and the filtering unit is used to filter the charging signal.

[0016] In a possible implementation manner of the first aspect, the charging drive integrated system further includes a charging detection unit and a control unit, the charging detection unit is used to be electrically connected to the charging port, and the control unit is electrically connected to the charging detection unit, the first switching unit, the second switching unit, the DC conversion unit, and the power unit respectively;

[0017] The charging detection unit is used to detect the operating condition information of the vehicle and transmit the operating condition information to the control unit; the control unit is used to control the first switching unit to switch to the first state and the second switching unit to switch to the third state when the vehicle is identified as being in a charging condition through the operating condition information; the control unit is also used to control the first switching unit to switch to the second state and the second switching unit to switch to the fourth state when the vehicle is identified as being in a driving condition through the operating condition information.

[0018] In a possible implementation of the first aspect, the control unit includes a controller, a first driver, a second driver, a third driver and a fourth driver, the controller is electrically connected to the first driver, the second driver, the third driver and the fourth driver, respectively, the first driver is electrically connected to the first switching unit, the second driver is electrically connected to the DC conversion unit, the third driver is electrically connected to the power unit, and the fourth driver is electrically connected to the second switching unit.

[0019] In a second aspect, an embodiment of the present application provides a vehicle, comprising the charging drive integrated system described in any one of the first aspects.

[0020] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0021] The present application provides a charging drive integrated system, including a battery unit, a first switching unit, a DC conversion unit, a power unit, a drive motor, and a second switching unit. The DC conversion unit is electrically connected to the battery unit, the power unit, and the first switching unit, respectively. The power unit is electrically connected to the first end of all windings in the drive motor, and the second switching unit is electrically connected to the charging port and the second end of all windings in the drive motor, respectively. When the vehicle is in a charging condition, the second switching unit switches to a third state, so that the second ends of all windings in the drive motor are connected to the charging port, and the windings in the drive motor act as inductors and are connected in series in the charging circuit. The first switching unit switches to a first state, so that the DC conversion unit is connected in series between the power unit and the battery unit, and the DC conversion unit is in a charging mode. At this time, the charging signal of the charging device passes through the charging port, the second switching unit, the drive motor, the power unit, and the DC conversion unit in sequence to charge the battery unit. When the charging device is charging the battery cell, the winding of the drive motor and the power unit form a power factor correction circuit to perform power correction on the charging signal output by the charging device. The DC conversion unit transforms the charging signal after power correction so that the voltage of the charging signal matches the voltage of the battery cell, thereby charging the battery cell.

[0022] When the vehicle is in the driving condition, the second switching unit switches to the fourth state, so that the second ends of all windings in the drive motor are interconnected, that is, the second ends of all windings in the drive motor are connected together to form the common end of the drive motor. The first switching unit switches to the second state, bypassing the DC conversion unit, and the DC conversion unit no longer plays a role in voltage conversion. At this time, the DC power output by the battery unit passes through the first switching unit to the power unit, and the power unit converts the DC power into AC power to drive the drive motor according to the requirements of the controller.

[0023] Therefore, compared with traditional vehicles that require the use of two systems for battery charging and motor driving, the charging and driving integrated system provided in the embodiment of the present application can not only charge the battery unit but also drive the drive motor. Only one system is needed to complete the battery charging function and the motor driving function, which reduces the use of electrical components, helps to reduce the size and weight of the vehicle, and thus achieves the effect of reducing the production cost of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1is a principle block diagram of a charging drive integrated system provided by an embodiment of the present application;

[0026] Figure 2 is a circuit connection diagram of a charging drive integrated system provided by an embodiment of the present application;

[0027] Figure 3 is a principle block diagram of a charging drive integrated system provided by another embodiment of the present application;

[0028] Figure 4 is a circuit connection diagram of a charging drive integrated system provided by another embodiment of the present application;

[0029] Figure 5 is a principle block diagram of a charging drive integrated system provided by another embodiment of the present application;

[0030] Figure 6 This is a circuit connection diagram of a charging drive integrated system provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0031] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0032] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0033] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0034] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0035] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0036] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0037] As a new energy vehicle, electric vehicles are becoming increasingly popular and are favored by consumers for their energy conservation, environmental protection, intelligence, low noise and superior power performance. Unlike fuel vehicles, electric vehicles are powered by battery cells, and the motor controller converts direct current into three-phase alternating current to drive the motor according to the target torque and speed sent by the vehicle controller, controlling the motor to complete functions such as starting, acceleration and deceleration, braking, and energy recovery.

[0038] As an important link in providing energy replenishment during the operation of electric vehicles, the charging system is an important basic support system. Whether the on-board power supply can be charged conveniently and efficiently has become one of the key factors restricting the industrial development of electric vehicles. At present, there are two main types of electric vehicle charging systems, namely off-board charging systems and on-board charging systems. Off-board charging systems are usually integrated into charging piles and large chargers, installed in fixed places such as parking lots and garages, mainly in the form of DC output, with fast charging speed; on-board charging systems are usually installed directly on electric vehicles. When electric vehicles are connected to three-phase or single-phase AC power, the on-board charging system converts AC power into DC power. The charging power level is low and the charging time is long. It is generally suitable for charging when the car is idle.

[0039] The on-board charging system can make electric vehicles no longer dependent on charging piles, making charging more convenient. After years of development, traditional on-board charging technology has gradually matured, but the driving and charging systems in most electric vehicles currently operate independently of each other. Components such as inverters, motors, and controllers are only used for driving. When the battery cell energy is insufficient, the battery is charged through another on-board charging system. This will cause problems such as increased size, weight, and cost of electric vehicles, as well as low power density levels, and cannot meet the increasing demand for high-power fast charging and low cost.

[0040] Based on the above problems, Figure 1 As shown, an embodiment of the present application provides a charging drive integrated system, including a battery unit 100, a first switching unit 200, a DC conversion unit 300, a power unit 400, a drive motor 500 and a second switching unit 600, the DC conversion unit 300 is electrically connected to the battery unit 100, the power unit 400 and the first switching unit 200 respectively, the power unit 400 is electrically connected to the first ends of all windings in the drive motor 500, and the second switching unit 600 is electrically connected to the charging port 700 and the second ends of all windings in the drive motor 500 respectively.

[0041] Specifically, when the vehicle is in a charging condition, the second switching unit 600 switches to the third state, so that the second ends of all windings in the drive motor 500 are connected to the charging port 700, and the windings in the drive motor 500 act as inductors and are connected in series in the charging circuit. The first switching unit 200 switches to the first state, so that the DC conversion unit 300 is connected in series between the power unit 400 and the battery unit 100, and the DC conversion unit 300 is in charging mode. At this time, the charging signal of the charging device passes through the charging port 700, the second switching unit 600, the drive motor 500, the power unit 400 and the DC conversion unit 300 in sequence to charge the battery unit 100. In the process of charging the battery unit 100 by the charging device, the windings of the drive motor 500 and the power unit 400 form a power factor correction circuit, and the charging signal output by the charging device is power corrected. The DC conversion unit 300 transforms the charging signal after power correction so that the voltage of the charging signal matches the voltage of the battery unit 100, so that the battery unit 100 can be charged.

[0042] When the vehicle is in a driving condition, the second switching unit 600 switches to the fourth state, so that the second ends of all windings in the drive motor 500 are interconnected, that is, the second ends of all windings in the drive motor 500 are connected together to form a common end of the drive motor 500. The first switching unit 200 switches to the second state, bypassing the DC conversion unit 300, and the DC conversion unit 300 no longer plays a role in voltage conversion. At this time, the battery unit 100 outputs DC power through the first switching unit 200 to the power unit 400, and the power unit 400 converts DC power into AC power according to the requirements of the controller to drive the drive motor 500.

[0043] Therefore, compared with traditional vehicles that require the use of two systems for battery charging and motor driving, the charging and driving integrated system provided in the embodiment of the present application can both charge the battery unit 100 and drive the drive motor 500. Only one system is needed to complete the battery charging function and the motor driving function, which reduces the use of electrical components, helps to reduce the size and weight of the vehicle, and thereby achieves the effect of reducing the production cost of the vehicle.

[0044] In some embodiments, Figure 2 As shown, the first switching unit 200 includes a first switch SW1 , a first end of the first switch SW1 is electrically connected to a first end of the DC conversion unit 300 , and a second end of the first switch SW1 is electrically connected to a second end of the DC conversion unit 300 .

[0045] Specifically, the first switch SW1 is electrically connected to the DC conversion unit 300, and the working state of the DC conversion unit 300 can be switched by controlling the state of the first switch SW1. When the vehicle is in a charging state, the first switch SW1 is switched to a disconnected state (i.e., the first switching unit 200 is switched to a first state). At this time, the DC conversion unit 300 is connected in series between the power unit 400 and the battery unit 100, and the DC conversion unit 300 switches to a charging mode. When the charging device is charging the battery unit 100, the winding of the drive motor 500 and the power unit 400 form a power factor correction circuit, and the charging signal output by the charging device is power corrected. The DC conversion unit 300 transforms the charging signal after power correction so that the voltage of the charging signal matches the voltage of the battery unit 100, thereby being able to charge the battery unit 100.

[0046] When the vehicle is in a driving condition, the first switch SW1 is switched to a closed state (i.e., the first switching unit 200 is switched to the second state), at which time the DC conversion unit 300 is bypassed, and the DC conversion unit 300 no longer plays a role in voltage conversion. The second switching unit 600 is switched to a fourth state, so that the second ends of all windings in the drive motor 500 are interconnected, that is, the second ends of all windings in the drive motor 500 are connected together to form a common end of the drive motor 500. At this time, the battery unit 100 outputs direct current through the first switching unit 200 to the power unit 400, and the power unit 400 converts direct current into alternating current to drive the drive motor 500 according to the requirements of the controller.

[0047] In some embodiments, Figure 2 As shown, the second switching unit 600 includes multiple first terminals A, multiple second terminals C and multiple third terminals B, all first terminals A are electrically connected to the second ends of all windings in the drive motor 500 one by one, all second terminals C are electrically connected to the charging port 700, and all third terminals B are interconnected.

[0048] Specifically, when the vehicle is in a charging condition, the second switching unit 600 is switched to the third state, and all the first terminals A and all the second terminals C are electrically connected one by one. At this time, the windings in the drive motor 500 act as inductors (inductors L1, L2, and L3) and are connected in series between the charging port 700 and the power unit 400. The windings of the drive motor 500 and the power unit 400 form a power factor correction circuit, which can perform power correction on the charging signal output by the charging device. The DC conversion unit 300 transforms the charging signal after power correction so that the voltage of the charging signal matches the voltage of the battery cell 100, thereby charging the battery cell 100.

[0049] When the vehicle is in a driving condition, the second switching unit 600 is switched to the fourth state, all the first terminals A and all the third terminals B are electrically connected one by one, and the second ends of all the windings in the drive motor 500 are interconnected, that is, the second ends of all the windings in the drive motor 500 are connected together to form a common end of the drive motor 500. At this time, the battery unit 100 outputs direct current through the first switching unit 200 to the power unit 400, and the power unit 400 converts the direct current into alternating current according to the requirements of the controller to drive the drive motor 500.

[0050] Therefore, the present application can realize the switching of the drive motor 500 mode through the structural design of the second switching unit 600, that is, it can realize the driving of the drive motor 500 and the charging of the battery unit 100, that is, the battery charging system and the motor drive system are integrated into one system, which reduces the use of electrical components, helps to reduce the size and weight of the vehicle, and further achieves the effect of reducing the production cost of the vehicle.

[0051] In some embodiments, Figure 3 As shown, the charging drive integrated system further includes a pre-charging unit 800 and a third switching unit 900, and the third switching unit 900 is electrically connected to the DC conversion unit 300, the battery unit 100 and the pre-charging unit 800 respectively.

[0052] Specifically, when the third switching unit 900 switches to the fifth state, the battery unit 100 charges the pre-charging unit 800; when the third switching unit 900 switches to the sixth state, the pre-charging unit 800 and the battery unit 100 are connected in parallel.

[0053] When charging the battery cell 100 of the vehicle, first switch the second switching unit 600 to the third state, so that the second ends of all windings in the drive motor 500 are connected to the charging port 700, and the windings in the drive motor 500 act as inductors and are connected in series in the charging circuit. Then switch the third switching unit 900 to the fifth state, so that the battery cell 100 charges the pre-charging unit 800. When the pre-charging unit 800 completes the pre-charging, switch the third switching unit 900 to the sixth state, and the pre-charging unit 800 and the battery cell 100 are connected in parallel. Finally, switch the first switching unit 200 to the first state, so that the DC conversion unit 300 is connected in series between the power unit 400 and the battery cell 100, and the DC conversion unit 300 is in charging mode. The charging signal of the charging device passes through the charging port 700, the second switching unit 600, the drive motor 500, the power unit 400 and the DC conversion unit 300 in sequence to charge the battery cell 100. When the charging device is charging the battery cell 100, the winding of the drive motor 500 and the power unit 400 form a power factor correction circuit to perform power correction on the charging signal output by the charging device. The DC conversion unit 300 transforms the charging signal after power correction so that the voltage of the charging signal matches the voltage of the battery cell 100, thereby charging the battery cell 100.

[0054] When driving the drive motor 500, first switch the second switching unit 600 to the fourth state so that the second ends of all windings in the drive motor 500 are interconnected, that is, the second ends of all windings in the drive motor 500 are connected together to form a common end of the drive motor 500. Then switch the third switching unit 900 to the fifth state so that the battery unit 100 charges the pre-charging unit 800. When the pre-charging unit 800 is fully charged, switch the third switching unit 900 to the sixth state, and the pre-charging unit 800 and the battery unit 100 are connected in parallel. Then switch the first switching unit 200 to the second state, bypass the DC conversion unit 300, and the DC conversion unit 300 no longer plays a role in voltage conversion. The battery unit 100 outputs DC power through the first switching unit 200 to the power unit 400, and the power unit 400 converts DC power into AC power to drive the drive motor 500 according to the requirements of the controller.

[0055] The present application sets a pre-charging unit 800 and a third switching unit 900 in the charging drive integrated system. The pre-charging unit 800 is pre-charged at the initial stage of driving the drive motor 500. The voltage at both ends of the pre-charging unit 800 increases slowly, so that the voltage of the power unit 400 increases slowly, and the voltage at both ends of the battery unit 100 is prevented from being directly loaded on the power unit 400, causing damage to the devices in the power unit 400. The pre-charging unit 800 is pre-charged at the initial stage of charging the battery unit 100 of the vehicle. The voltage at both ends of the pre-charging unit 800 increases slowly, so that the voltage of the DC conversion unit 300 increases slowly, and the voltage at both ends of the battery unit 100 is prevented from being directly loaded on the DC conversion unit 300, causing damage to the devices in the DC conversion unit 300. By setting the pre-charging unit 800 and the third switching unit 900, the electronic devices can be protected, thereby improving the stability of the charging drive integrated system.

[0056] In some embodiments, Figure 4 As shown, the third switching unit 900 includes a second switch SW2, a third switch SW3 and a first resistor R1, the first end of the second switch SW2 is electrically connected to the first end of the first resistor R1 and the positive electrode of the battery cell 100, respectively, the second end of the first resistor R1 is electrically connected to the first end of the third switch SW3, and the second end of the third switch SW3 is electrically connected to the second end of the second switch SW2, the pre-charging unit 800, the first switching unit 200 and the DC conversion unit 300, respectively.

[0057] Specifically, when charging the battery cell 100 of the vehicle, first switch the second switching unit 600 to the third state, so that the second ends of all windings in the drive motor 500 are connected to the charging port 700, and the windings in the drive motor 500 act as inductors and are connected in series in the charging circuit. Then control the third switch SW3 to close, control the second switch SW2 to open (that is, the third switching unit 900 is switched to the fifth state), so that the battery cell 100 charges the pre-charging unit 800 through the first resistor R1. When the pre-charging unit 800 completes the pre-charging, control the third switch SW3 to open, control the second switch SW2 to close (that is, the third switching unit 900 is switched to the sixth state), and the pre-charging unit 800 and the battery cell 100 are connected in parallel. Then switch the first switching unit 200 to the first state, so that the DC conversion unit 300 is connected in series between the power unit 400 and the battery cell 100, and the DC conversion unit 300 is in charging mode. The charging signal of the charging device sequentially passes through the charging port 700, the second switching unit 600, the drive motor 500, the power unit 400, the DC conversion unit 300 and the second switch SW2 to charge the battery unit 100. When the charging device is charging the battery unit 100, the winding of the drive motor 500 and the power unit 400 form a power factor correction circuit to perform power correction on the charging signal output by the charging device, and the DC conversion unit 300 transforms the charging signal after power correction so that the voltage of the charging signal matches the voltage of the battery unit 100, thereby charging the battery unit 100.

[0058] When driving the drive motor 500, first switch the second switching unit 600 to the fourth state, so that the second ends of all windings in the drive motor 500 are interconnected, that is, the second ends of all windings in the drive motor 500 are connected together to form a common end of the drive motor 500. Then control the third switch SW3 to close, control the second switch SW2 to open (that is, the third switching unit 900 is switched to the fifth state), so that the battery unit 100 charges the pre-charge unit 800 through the first resistor R1. When the pre-charge unit 800 completes pre-charging, control the third switch SW3 to open, control the second switch SW2 to close (that is, the third switching unit 900 is switched to the sixth state), and the pre-charge unit 800 and the battery unit 100 are connected in parallel. Then switch the first switching unit 200 to the second state, bypass the DC conversion unit 300, and the DC conversion unit 300 no longer plays a role in voltage conversion. The battery unit 100 outputs direct current through the second switch SW2 and the first switching unit 200 to the power unit 400. The power unit 400 converts the direct current into alternating current to drive the drive motor 500 according to the requirements of the controller.

[0059] For example, Figure 4As shown, the pre-charge unit 800 includes a first capacitor C1, a first end of the first capacitor C1 is electrically connected to a second end of the second switch SW2 and a second end of the third switch SW3, respectively, and a second end of the first capacitor C1 is electrically connected to the negative electrode of the battery unit 100. The first switch SW1, the second switch SW2 and the third switch SW3 can be contactor switches.

[0060] In some embodiments, the charging drive integrated system further includes a filter unit 10 , which is connected in series between the second switching unit 600 and the charging port 700 , and is used to filter the charging signal.

[0061] Specifically, when the battery unit 100 of the vehicle is charged, the filter unit 10 can filter the charging signal output by the charging device to play a role in protecting the circuit.

[0062] In some embodiments, Figure 5 As shown, the charging drive integrated system also includes a charging detection unit 30 and a control unit 20. The charging detection unit 30 is used to be electrically connected to the charging port 700, and the control unit 20 is electrically connected to the charging detection unit 30, the first switching unit 200, the second switching unit 600, the DC conversion unit 300 and the power unit 400 respectively.

[0063] Specifically, the charging detection unit 30 is used to be electrically connected to the charging port 700. When the charging device is connected to the charging port 700, the charging detection unit 30 can detect the charging signal of the charging port 700. If the charging detection unit 30 detects that the charging port 700 has a charging signal, it means that the charging device is connected to the charging port 700, and the vehicle is in a charging condition. At this time, the charging detection unit 30 outputs the condition information used to characterize that the vehicle is in a charging condition. If the charging detection unit 30 does not detect that the charging port 700 has a charging signal, it means that the charging device is not connected to the charging port 700, and the vehicle is not in a charging condition. At this time, the vehicle is in a driving condition. At this time, the charging detection unit 30 outputs the condition information used to characterize that the vehicle is in a driving condition.

[0064] The control unit 20 is used to control the second switching unit 600 to switch to the third state when the vehicle is in a charging state through the working condition information, so that the second ends of all windings in the drive motor 500 are connected to the charging port 700, and the windings in the drive motor 500 act as inductors and are connected in series in the charging circuit. Then the control unit 20 controls the third switching unit 900 to switch to the fifth state so that the battery unit 100 charges the pre-charging unit 800. When the pre-charging unit 800 completes the pre-charging, the control unit 20 controls the third switching unit 900 to switch to the sixth state, and the pre-charging unit 800 and the battery unit 100 are connected in parallel. The control unit 20 controls the first switching unit 200 to switch to the first state, so that the DC conversion unit 300 is connected in series between the power unit 400 and the battery unit 100, and the DC conversion unit 300 is in charging mode. The charging signal of the charging device passes through the charging port 700, the second switching unit 600, the drive motor 500, the power unit 400 and the DC conversion unit 300 in sequence to charge the battery unit 100. When the charging device is charging the battery cell 100, the winding of the drive motor 500 and the power unit 400 form a power factor correction circuit. The control unit 20 controls the power unit 400 to perform power correction on the charging signal output by the charging device. The control unit 20 controls the DC conversion unit 300 to transform the charging signal after power correction so that the voltage of the charging signal matches the voltage of the battery cell 100, thereby charging the battery cell 100.

[0065] The control unit 20 is also used to control the second switching unit 600 to switch to the fourth state when the vehicle is identified to be in a driving state through the working condition information, so that the second ends of all windings in the drive motor 500 are interconnected, that is, the second ends of all windings in the drive motor 500 are connected together to form a common end of the drive motor 500. Then the control unit 20 controls the third switching unit 900 to switch to the fifth state, so that the battery unit 100 charges the pre-charge unit 800. When the pre-charge unit 800 is fully charged, the control unit 20 controls the third switching unit 900 to switch to the sixth state, and the pre-charge unit 800 and the battery unit 100 are connected in parallel. The control unit 20 then switches the first switching unit 200 to the second state, bypasses the DC conversion unit 300, and the DC conversion unit 300 no longer plays a role in voltage conversion. The battery unit 100 outputs DC power through the first switching unit 200 to the power unit 400, and the control unit 20 controls the power unit 400 to convert DC power into AC power to drive the drive motor 500.

[0066] Therefore, compared with traditional vehicles that require the use of two systems for battery charging and motor driving, the charging and driving integrated system provided in the embodiment of the present application can both charge the battery unit 100 and drive the drive motor 500. Only one system is needed to complete the battery charging function and the motor driving function, which reduces the use of electrical components, helps to reduce the size and weight of the vehicle, and thereby achieves the effect of reducing the production cost of the vehicle.

[0067] In some embodiments, Figure 6 As shown, the control unit 20 includes a controller 201, a first driver 202, a second driver 203, a third driver 204 and a fourth driver 205. The controller 201 is electrically connected to the first driver 202, the second driver 203, the third driver 204 and the fourth driver 205 respectively. The first driver 202 is electrically connected to the first switching unit 200, the second driver 203 is electrically connected to the DC conversion unit 300, the third driver 204 is electrically connected to the power unit 400, and the fourth driver 205 is electrically connected to the second switching unit 600.

[0068] Specifically, the controller 201 drives the first switching unit 200 to operate by controlling the first driver 202, so that the first switching unit 200 switches to the first state or the second state. The controller 201 drives the DC conversion unit 300 to operate by controlling the second driver 203, so that the DC conversion unit 300 performs voltage conversion. The controller 201 drives the power unit 400 to operate by controlling the third driver 204, so that the power unit 400 performs power regulation. The controller 201 drives the second switching unit 600 to operate by controlling the fourth driver 205, so that the second switching unit 600 switches to the third state or the fourth state.

[0069] In some embodiments, Figure 6 As shown, the charging port in the present application may include a three-phase charging port 701 and a single-phase charging port 702. When the vehicle is charged with three-phase alternating current, the three-phase alternating current charging device is connected to the three-phase charging port 701, and the three windings (L1, L2 and L3) in the drive motor 500 and the power unit 400 together constitute a power factor correction circuit. When the vehicle is charged with single-phase alternating current, the single-phase alternating current charging device is connected to the single-phase charging port 702, and the two windings (L1 and L2) in the drive motor and the power unit 400 together constitute a power factor correction circuit.

[0070] In order to clearly explain the working principle of the charging drive integrated system, the following Figure 6 The charging and driving conditions of the charging and driving integrated system are described.

[0071] The driving motor is a three-phase motor, and includes three windings L1, L2 and L3.

[0072] When the vehicle is in the charging state, the controller 201 drives the second switching unit 600 to switch to the third state through the fourth driver 205, so that the second ends of all windings (L1, L2 and L3) in the drive motor 500 are connected to the charging port 700, and the windings in the drive motor 500 act as inductors and are connected in series in the charging circuit. Then the controller 201 drives the third switch SW3 to close through the fifth driver 206, and drives the second switch SW2 to open (that is, drives the third switching unit 900 to switch to the fifth state), so that the battery unit 100 charges the pre-charging unit 800 through the first resistor R1. When the pre-charging unit 800 completes pre-charging, the controller 201 drives the third switch SW3 to open through the fifth driver 206, drives the second switch SW2 to close (that is, drives the third switching unit 900 to switch to the sixth state), and the pre-charging unit 800 and the battery unit 100 are connected in parallel. The controller 201 drives the first switch SW1 to be disconnected through the first driver 202 at the same time, so that the DC conversion unit 300 is connected in series between the power unit 400 and the battery unit 100, and the DC conversion unit 300 is in charging mode. The charging signal of the charging device passes through the charging port 700, the filter unit 10, the second switching unit 600, the drive motor 500, the power unit 400, the DC conversion unit 300 and the second switch SW2 in sequence to charge the battery unit 100. When the charging device is charging the battery unit 100, the controller 201 drives the power unit 400 to work by controlling the third driver 204, so that the power unit 400 performs power regulation. The controller 201 drives the DC conversion unit 300 to work by controlling the second driver 203, so that the DC conversion unit 300 performs voltage conversion, so that the voltage of the charging signal matches the voltage of the battery unit 100, so that the battery unit 100 can be charged.

[0073] When the vehicle is in a driving condition, the controller 201 drives the second switching unit 600 to switch to the fourth state through the fourth driver 205, so that the second ends of all windings in the drive motor 500 are interconnected, that is, the second ends of all windings in the drive motor 500 are connected together to form a common end of the drive motor 500. Then the controller 201 drives the third switch SW3 to close through the fifth driver 206, drives the second switch SW2 to open (that is, drives the third switching unit 900 to switch to the fifth state), so that the battery unit 100 charges the pre-charge unit 800 through the first resistor R1. When the pre-charge unit 800 completes pre-charging, the controller 201 drives the third switch SW3 to open through the fifth driver 206, drives the second switch SW2 to close (that is, drives the third switching unit 900 to switch to the sixth state), and the pre-charge unit 800 and the battery unit 100 are connected in parallel. At the same time, the controller 201 drives the first switch SW1 to close through the first driver 202, bypasses the DC conversion unit 300, and the DC conversion unit 300 no longer plays a role in voltage conversion. The battery unit 100 outputs direct current through the second switch SW2 and the first switching unit 200 to reach the power unit 400. The controller 201 drives the power unit 400 to work through the third driver 204, so that the power unit 400 performs power regulation to drive the drive motor 500.

[0074] Therefore, compared with traditional vehicles that require the use of two systems for battery charging and motor driving, the charging and driving integrated system provided in the embodiment of the present application can both charge the battery unit 100 and drive the drive motor 500. Only one system is needed to complete the battery charging function and the motor driving function, which reduces the use of electrical components, helps to reduce the size and weight of the vehicle, and thereby achieves the effect of reducing the production cost of the vehicle.

[0075] The present application also provides a vehicle, including the charging drive integrated system described above. When the vehicle is in a charging condition, the first switching unit switches to a first state, so that the DC conversion unit is connected in series between the power unit and the battery unit, and the DC conversion unit is in a charging mode. The second switching unit switches to a third state, so that the second ends of all windings in the drive motor are connected to the charging port, and the windings in the drive motor act as inductors and are connected in series in the charging circuit. At this time, the charging signal of the charging device passes through the charging port, the second switching unit, the drive motor, the power unit, and the DC conversion unit in sequence to charge the battery unit. In the process of the charging device charging the battery unit, the windings of the drive motor and the power unit form a power factor correction circuit, and the charging signal output by the charging device is power corrected. The DC conversion unit transforms the charging signal after power correction so that the voltage of the charging signal matches the voltage of the battery unit, thereby being able to charge the battery unit.

[0076] When the vehicle is in a driving condition, the first switching unit switches to the second state, bypassing the DC conversion unit, and the DC conversion unit no longer plays a role in voltage conversion. The second switching unit switches to the fourth state, interconnecting the second ends of all windings in the drive motor, that is, the second ends of all windings in the drive motor are connected together to form a common end of the drive motor. At this time, the DC power output by the battery unit passes through the first switching unit to the power unit, and the power unit converts the DC power into AC power to drive the drive motor according to the requirements of the controller.

[0077] Therefore, compared with traditional vehicles that require the use of two systems for battery charging and motor driving, the charging and driving integrated system provided in the embodiment of the present application can not only charge the battery unit but also drive the drive motor. Only one system is needed to complete the battery charging function and the motor driving function, which reduces the use of electrical components, helps to reduce the size and weight of the vehicle, and thus achieves the effect of reducing the production cost of the vehicle.

[0078] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A charging drive integrated system, characterized in that: The device comprises a battery unit, a first switching unit, a DC conversion unit, a power unit, a drive motor, and a second switching unit, wherein the DC conversion unit is electrically connected to the battery unit, the power unit, and the first switching unit, respectively, the power unit is electrically connected to the first ends of all windings in the drive motor, and the second switching unit is electrically connected to the charging port and the second ends of all windings in the drive motor, respectively; When the vehicle is in a charging state, the second switching unit switches to a third state, so that the second ends of all windings in the drive motor are connected to the charging port, and the first switching unit switches to a first state, so that the DC conversion unit is connected in series between the power unit and the battery unit, and the charging device charges the battery unit through the charging port, the second switching unit, the drive motor, the power unit and the DC conversion unit; When the vehicle is in a driving condition, the second switching unit switches to the fourth state, interconnecting the second ends of all windings in the drive motor, and the first switching unit switches to the second state, bypassing the DC conversion unit, and the battery unit drives the drive motor through the first switching unit and the power unit.

2. The charging drive integrated system according to claim 1, characterized in that: The first switching unit includes a first switch, a first end of the first switch is electrically connected to a first end of the DC conversion unit, and a second end of the first switch is electrically connected to a second end of the DC conversion unit; When the first switch is disconnected, the DC conversion unit is connected in series between the power unit and the battery unit; when the first switch is closed, the DC conversion unit is bypassed.

3. The charging drive integrated system according to claim 1, characterized in that: The second switching unit includes a plurality of first terminals, a plurality of second terminals and a plurality of third terminals, all of the first terminals are electrically connected to the second ends of all windings in the drive motor in a one-to-one correspondence, all of the second terminals are electrically connected to the charging port, and all of the third terminals are interconnected; When the second switching unit is switched to the third state, all the first terminals and all the second terminals are electrically connected in a one-to-one correspondence; when the second switching unit is switched to the fourth state, all the first terminals and all the third terminals are electrically connected in a one-to-one correspondence.

4. The charging drive integrated system according to claim 1, characterized in that: The charging drive integrated system further includes a pre-charging unit and a third switching unit, wherein the third switching unit is electrically connected to the DC conversion unit, the battery unit and the pre-charging unit respectively; When the third switching unit is switched to the fifth state, the battery unit charges the pre-charging unit; when the third switching unit is switched to the sixth state, the pre-charging unit and the battery unit are connected in parallel.

5. The charging drive integrated system according to claim 4, characterized in that: The third switching unit includes a second switch, a third switch and a first resistor, the first end of the second switch is electrically connected to the first end of the first resistor and the positive electrode of the battery unit, respectively, the second end of the first resistor is electrically connected to the first end of the third switch, and the second end of the third switch is electrically connected to the second end of the second switch, the pre-charging unit, the first switching unit and the DC conversion unit, respectively.

6. The charging drive integrated system according to claim 5, characterized in that: The pre-charging unit includes a first capacitor, a first end of the first capacitor is electrically connected to the second end of the second switch and the second end of the third switch respectively, and a second end of the first capacitor is electrically connected to the negative electrode of the battery unit.

7. The charging drive integrated system according to claim 1, characterized in that: The charging drive integrated system further includes a filtering unit, which is connected in series between the second switching unit and the charging port; the filtering unit is used to filter the charging signal.

8. The charging drive integrated system according to any one of claims 1 to 7, characterized in that: The charging drive integrated system further includes a charging detection unit and a control unit, wherein the charging detection unit is used to be electrically connected to the charging port, and the control unit is electrically connected to the charging detection unit, the first switching unit, the second switching unit, the DC conversion unit and the power unit respectively; The charging detection unit is used to detect the operating condition information of the vehicle and transmit the operating condition information to the control unit; the control unit is used to control the first switching unit to switch to the first state and the second switching unit to switch to the third state when the vehicle is identified as being in a charging condition through the operating condition information; the control unit is also used to control the first switching unit to switch to the second state and the second switching unit to switch to the fourth state when the vehicle is identified as being in a driving condition through the operating condition information.

9. The charging drive integrated system according to claim 8, characterized in that: The control unit includes a controller, a first driver, a second driver, a third driver and a fourth driver. The controller is electrically connected to the first driver, the second driver, the third driver and the fourth driver respectively. The first driver is electrically connected to the first switching unit, the second driver is electrically connected to the DC conversion unit, the third driver is electrically connected to the power unit, and the fourth driver is electrically connected to the second switching unit.

10. A vehicle, characterized in that: A charging drive integrated system comprising any one of claims 1-9.

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