CN215097044U

CN215097044U - Vehicle control unit and vehicle

Info

Publication number: CN215097044U
Application number: CN202120856795.1U
Authority: CN
Inventors: 李娟�; 应翔; 邵赓华; 熊建; 孟凡坤; 王新宇; 刘丛林
Original assignee: Beiqi Foton Motor Co Ltd
Current assignee: Beiqi Foton Motor Co Ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-12-10
Anticipated expiration: 2031-04-23

Abstract

The utility model relates to a vehicle control unit and vehicle, relate to vehicle control technical field, this vehicle control unit includes the control unit, predriver, and drive circuit, the control unit is connected with the predriver, the predriver is connected with drive circuit, drive circuit is connected with the motor, the control unit, be used for according to the status information of vehicle, confirm control signal, and send control signal to the predriver, be used for according to control signal, confirm the drive signal that control signal corresponds, and send drive signal to drive circuit, be used for according to drive signal, the control motor rotates. This openly can rotate through vehicle control unit direct control motor, need not set up extra machine controller and control the motor, the complexity of the whole pencil overall arrangement of vehicle is lower, has reduced the cost of vehicle simultaneously.

Description

Vehicle control unit and vehicle

Technical Field

The disclosure relates to the technical field of vehicle control, in particular to a vehicle control unit and a vehicle.

Background

With the increasing automobile reserves in China, green and environment-friendly new energy automobiles are widely applied while paying attention to sustainable development. The VCU (English Vehicle Control Unit, Chinese) is used as a core component of the new energy automobile and can Control various types of small motors. Currently, the VCU mainly sends an enable signal to the motor controller, and the motor controller controls the motor to work or stop working, so as to achieve the purpose that the VCU controls the motor. However, in such a manner, an additional motor controller needs to be arranged, the complexity of the overall wiring harness layout is high, and the cost of the entire vehicle is increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the related art, the present disclosure provides a vehicle control unit and a vehicle.

In order to achieve the above object, according to a first aspect of the embodiments of the present disclosure, a vehicle control unit is provided, which includes a control unit, a pre-driver, and a driving circuit, wherein the control unit is connected to the pre-driver, the pre-driver is connected to the driving circuit, and the driving circuit is connected to a motor;

the control unit is used for determining a control signal according to the state information of the vehicle and sending the control signal to the pre-driver;

the pre-driver is used for determining a driving signal corresponding to the control signal according to the control signal and sending the driving signal to the driving circuit;

and the drive circuit is used for controlling the motor to rotate according to the drive signal.

Optionally, the driving circuit comprises a first control switch, a second control switch, a third control switch and a fourth control switch;

the first control switch, the second control switch, the third control switch and the fourth control switch's control end all with the predriver is connected, the first control switch's first end with the first end of second control switch all is connected with the power, the first control switch's second end with the first end of third control switch all with the anodal of motor is connected, the second control switch's second end with the first end of fourth control switch all with the negative pole of motor is connected, the third control switch with the second end of fourth control switch all is ground connection.

Optionally, the first control switch, the second control switch, the third control switch, and the fourth control switch are all P-channel field effect transistors PMOS;

the gate of the PMOS is used as the control terminal of a target control switch, the source of the PMOS is used as the first terminal of the target control switch, the drain of the PMOS is used as the second terminal of the target control switch, and the target control switch is any one of the first control switch, the second control switch, the third control switch and the fourth control switch.

Optionally, the control signal includes a Pulse Width Modulation (PWM) signal, a direction signal, and an on-off signal;

the PWM signal is used for controlling the turn-on duration of the first control switch, the second control switch, the third control switch and the fourth control switch, the direction signal is used for controlling the rotation direction of the motor, and the on-off signal is used for controlling the turn-on or turn-off of the first control switch, the second control switch, the third control switch and the fourth control switch.

Optionally, the pre-driver includes a first control pin, a second control pin, and a third control pin, and the control unit is connected to the first control pin, the second control pin, and the third control pin respectively;

the control unit is used for sending the PWM signal to the pre-driver through the first control pin;

the control unit is used for sending the direction signal to the pre-driver through the second control pin;

and the control unit is used for sending the on-off signal to the pre-driver through the third control pin.

Optionally, the control signal further includes a brake signal, and the brake signal is used for controlling the motor to brake; the pre-driver further comprises a communication pin, and the control unit is connected with the communication pin;

the control unit is used for sending the brake signal to the pre-driver through the communication pin.

Optionally, the vehicle control unit further includes a power management unit, the power management unit is respectively connected to the control unit, the pre-driver and the power supply, and the pre-driver is connected to the power supply.

Optionally, the control unit is a micro control unit MCU, and the pre-driver is an L9945 chip.

According to a second aspect of the embodiments of the present disclosure, a vehicle is provided, where the vehicle control unit and the motor of the first aspect are provided.

Through the technical scheme, the vehicle control unit in this disclosure includes the control unit, the predriver, and drive circuit, wherein, the control unit is connected with the predriver, the predriver is connected with drive circuit, drive circuit is connected with the motor, the control unit for according to the status information of vehicle, confirm control signal, and send control signal to the predriver, the predriver is used for according to control signal, confirm the drive signal that control signal corresponds, and send drive signal to drive circuit, drive circuit is used for according to drive signal, the control motor rotates. This openly can rotate through vehicle control unit direct control motor, need not set up extra machine controller and control the motor, the complexity of the whole pencil overall arrangement of vehicle is lower, has reduced the cost of vehicle simultaneously.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a block diagram illustrating a vehicle control unit in accordance with an exemplary embodiment;

FIG. 2 is a block diagram illustrating another hybrid vehicle controller in accordance with an exemplary embodiment;

FIG. 3 is a block diagram illustrating another hybrid vehicle controller in accordance with an exemplary embodiment;

FIG. 4 is a block diagram illustrating another hybrid vehicle controller in accordance with an exemplary embodiment;

FIG. 5 is a block diagram illustrating another hybrid vehicle controller in accordance with an exemplary embodiment;

FIG. 6 is a block diagram illustrating yet another hybrid vehicle controller in accordance with an exemplary embodiment;

FIG. 7 is a block diagram of a vehicle shown in accordance with an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Before the vehicle control unit and the vehicle provided by the present disclosure are introduced, an application scenario related to various embodiments of the present disclosure is first introduced. The application scenario may include a vehicle equipped with the hybrid vehicle controller 10 and the motor 20. The vehicle can be a new energy vehicle, such as a pure electric vehicle or a hybrid vehicle, and can also be other types of motor vehicles or non-motor vehicles. The motor 20 may be any type of small motor, such as a high speed fan, a low speed fan, an air pump cooling fan, a battery cooling fan, a cooling water pump, a battery water cooling pump, a motor on a vacuum pump.

Fig. 1 is a block diagram illustrating a vehicle control unit in accordance with an exemplary embodiment. As shown in fig. 1, the vehicle control unit 10 includes a control unit 11, a pre-driver 12, and a driving circuit 13, wherein the control unit 11 is connected to the pre-driver 12, the pre-driver 12 is connected to the driving circuit 13, and the driving circuit 13 is connected to a motor 20.

A control unit 11 for determining a control signal according to the state information of the vehicle and sending the control signal to the pre-driver 12.

For example, in order to enable the vehicle control unit 10 to directly control the rotation of the motor 20, the driving circuit 13 may be incorporated in the vehicle control unit 10, and the driving circuit 13 may control the rotation of the motor 20, so as to achieve the purpose that the vehicle control unit 10 directly controls the rotation of the motor 20.

Specifically, the vehicle control unit 10 may be composed of a control unit 11, a pre-driver 12, and a driving circuit 13. The control Unit 11 may be an MCU (micro controller Unit, chinese) and the pre-driver 12 may be an L9945 chip. First, the control signal may be determined by the control unit 11 according to the state information of the vehicle. The state information is information capable of reflecting the vehicle's requirement for the motor, and the control signal is used for indicating at least one of a rotation direction, a rotation mode and a motor rotation speed of the motor 20. For example, in the case where the motor 20 is a power battery cooling fan, the status information may be the temperature of the power battery, and when the temperature of the power battery is high, the battery cooling fan is required to increase the rotation speed to decrease the temperature of the power battery, and at this time, a control signal for indicating the rotation speed of the motor may be generated. The control unit 11 may then send a control signal to the pre-driver 12.

And the pre-driver 12 is configured to determine a driving signal corresponding to the control signal according to the control signal, and send the driving signal to the driving circuit 13.

And the driving circuit 13 is used for controlling the motor 20 to rotate according to the driving signal.

For example, after receiving the control signal, the pre-driver 12 may determine a driving signal corresponding to the control signal according to the control signal. For example, the predriver 12 may generate a corresponding PWM (Pulse width modulation, chinese) signal as the driving signal according to the rotation direction, the rotation mode, and the motor rotation speed indicated by the control signal. Then, the pre-driver 12 may send a driving signal to the driving circuit 13, so that the driving circuit 13 controls the motor 20 to rotate according to the driving signal.

It should be noted that, by the vehicle control unit 10 integrated with the control unit 11, the pre-driver 12, and the driving circuit 13, the rotation direction, the rotation mode, and the motor rotation speed of the motor 20 can be directly controlled according to the state information of the vehicle. By adopting the mode, the overall function of the vehicle controller 10 is enhanced, the power consumption of the vehicle can be reduced, an additional motor controller is saved, and the cost of the vehicle is reduced. In addition, since an additional motor controller is not required, the overall wiring harness layout of the vehicle can also be simplified.

In summary, the vehicle control unit in the present disclosure includes a control unit, a pre-driver, and a driving circuit, where the control unit is connected to the pre-driver, the pre-driver is connected to the driving circuit, the driving circuit is connected to the motor, the control unit is configured to determine a control signal according to status information of the vehicle and send the control signal to the pre-driver, the pre-driver is configured to determine a driving signal corresponding to the control signal according to the control signal and send the driving signal to the driving circuit, and the driving circuit is configured to control the motor to rotate according to the driving signal. This openly can rotate through vehicle control unit direct control motor, need not set up extra machine controller and control the motor, the complexity of the whole pencil overall arrangement of vehicle is lower, has reduced the cost of vehicle simultaneously.

In one scenario, the driving circuit 13 may employ an H-bridge circuit. As shown in fig. 2, the driving circuit 13 may include a first control switch 131, a second control switch 132, a third control switch 133, and a fourth control switch 134. The control ends of the first control switch 131, the second control switch 132, the third control switch 133 and the fourth control switch 134 are all connected to the pre-driver 12, the first end of the first control switch 131 and the first end of the second control switch 132 are all connected to the power supply 30, the second end of the first control switch 131 and the first end of the third control switch 133 are all connected to the positive pole of the motor 20, the second end of the second control switch 132 and the first end of the fourth control switch 134 are all connected to the negative pole of the motor 20, and the second ends of the third control switch 133 and the fourth control switch 134 are all grounded. At this time, the driving signal may include a signal that controls each of the control switches (i.e., the first control switch 131, the second control switch 132, the third control switch 133, and the fourth control switch 134) to be turned on and off, respectively. The driving signal can control the on and off of each control switch respectively to control the rotation direction, the rotation mode and the motor rotation speed of the motor 20.

Further, the control switches may be field effect transistors, for example, as shown in fig. 3, the first control switch 131, the second control switch 132, the third control switch 133 and the fourth control switch 134 may all be PMOS (Q1-Q4 in fig. 3 represent the first control switch 131, the second control switch 132, the third control switch 133 and the fourth control switch 134, respectively). Wherein, the gate of the PMOS is used as the control terminal of the target control switch, the source of the PMOS is used as the first terminal of the target control switch, the drain of the PMOS is used as the second terminal of the target control switch, and the target control switch is any one of the first control switch 131, the second control switch 132, the third control switch 133 and the fourth control switch 134. At this time, the driving signal may include signals that respectively control on and off of each PMOS.

Optionally, the control signal includes a PWM signal, a direction signal, and an on-off signal.

The PWM signal is used to control the on-time of the first control switch 131, the second control switch 132, the third control switch 133, and the fourth control switch 134, the direction signal is used to control the rotation direction of the motor 20, and the on-off signal is used to control the on-off of the first control switch 131, the second control switch 132, the third control switch 133, and the fourth control switch 134.

The control signals may include, for example, PWM signals, direction signals, on-off signals. When acquiring the control signal, the pre-driver 12 may generate a corresponding driving signal according to the PWM signal, the direction signal, and the on-off signal, so as to steer the motor 20 in different rotation directions, rotation modes, and motor rotation speeds. The manner of generating the driving signal may refer to the description in the related art, and is not described in detail here.

Fig. 4 is a block diagram illustrating another hybrid vehicle controller in accordance with an exemplary embodiment. As shown in fig. 4, the pre-driver 12 includes a first control pin 121, a second control pin 122 and a third control pin 123, and the control unit 11 is connected to the first control pin 121, the second control pin 122 and the third control pin 123, respectively.

A control unit 11 for sending a PWM signal to the pre-driver 12 through the first control pin 121.

A control unit 11 for sending a direction signal to the pre-driver 12 through the second control pin 122.

And the control unit 11 is used for sending an on-off signal to the pre-driver 12 through the third control pin 123.

For example, the pre-driver 12 may include a first control pin 121, a second control pin 122, and a third control pin 123, for example, in a case where the pre-driver 12 is an L9945 chip, the NON1 pin of the L9945 chip may be used as the first control pin 121, the NON2 pin may be used as the second control pin 122, and the NON3 pin may be used as the third control pin 123. At this time, the control unit 11 may transmit the PWM signal to the pre-driver 12 through the NON1 pin, may transmit the direction signal to the pre-driver 12 through the NON2 pin, and may transmit the on/off signal to the pre-driver 12 through the NON3 pin. Alternatively, the NON5 pin of the L9945 chip may be used as the first control pin 121, the NON6 pin as the second control pin 122, and the NON7 pin as the third control pin 123. At this time, the control unit 11 may transmit the PWM signal to the pre-driver 12 through the NON5 pin, may transmit the direction signal to the pre-driver 12 through the NON6 pin, and may transmit the on/off signal to the pre-driver 12 through the NON7 pin.

Further, the control signal may further include a brake signal, and the pre-driver 12 may further include a communication pin 124, as shown in fig. 5, and the control unit 11 is connected to the communication pin 124.

Wherein the braking signal is used to control the motor 20 to brake. A control unit 11 for sending a brake signal to the pre-driver 12 via the communication pin 124.

For example, the communication pin 124 may be an SPI (Serial Peripheral Interface), for example, in the case that the pre-driver 12 is an L9945 chip, the SCK, NCS, SDI, and SDO pins of the L9945 chip may be used as the communication pin 124. At this time, the control unit 11 may transmit the brake signal to the pre-driver 12 through the SCK, NCS, SDI, SDO pins. In addition, the pre-driver 12 may further include a reset pin for controlling the pre-driver 12 to be reset, and an enable pin for controlling signal input/output.

It should be noted that different PWM signals, direction signals, on-off signals, and braking signals may correspond to different rotation modes of the motor 20, that is, the rotation mode of the motor 20 may be controlled by the PWM signals, the direction signals, the on-off signals, and the braking signals. For example, the correspondence relationship between the PWM signal, the direction signal, the ON-OFF signal, and the braking signal and the rotation mode may be as shown in table 1, where NPWM is the PWM signal, DIR is the direction signal, HiZ is the ON-OFF signal, HBx _ AFW is the braking signal, 0 is a low level signal, 1 is a high level signal, X is used to indicate that the motor 20 is not concerned (i.e., the signal can be ignored), high impedance is used to indicate that the motor 20 is not rotating, OFF is used to indicate that the control switch is in the OFF state, and ON is used to indicate that the control switch is in the ON state.

TABLE 1

HiZ

DIR

NPWM

HBx_AFW

Q1

Q2

Q3

Q4

Rotation mode

0

X

OFF

ON

OFF

Rotate in opposite directions

0

1

0

OFF

ON

OFF

Free rotation (reverse)

0

1

OFF

ON

Active free rotation (reverse)

0

1

0

X

ON

OFF

ON

Rotate in the positive direction

0

1

0

OFF

ON

Free rotation (Forward)

0

1

OFF

ON

Active free rotation (Forward)

1

X

OFF

High impedance

FIG. 6 is a block diagram illustrating yet another hybrid vehicle controller in accordance with an exemplary embodiment. As shown in fig. 6, the vehicle control unit 10 further includes a power management unit 14, the power management unit 14 is connected to the control unit 11, the pre-driver 12 and the power supply 30, respectively, and the pre-driver 12 is connected to the power supply 30.

In another scenario, the vehicle control unit 10 may further include a power management unit 14, the power management unit 14 may employ an SBC (System base chip), the power management unit 14 may provide a driving voltage (e.g., 1.3V, 3.3V, and 5V) for operating the control unit 11 to the control unit 11, and provide an operating voltage (e.g., 5V) for operating the pre-driver 12 to the pre-driver 12, and the pre-driver 12 may ensure that the pre-driver 12 operates normally by the operating voltage provided by the pre-driver 12 and the battery voltage provided by the power supply 30.

The present disclosure also relates to a vehicle, as shown in fig. 7, in which any one of the vehicle controllers 10 and the motor 20 described above is provided on the vehicle 40.

With regard to the vehicle 40 in the above-described embodiment, the specific manner in which the vehicle control unit 10 performs the operation has been described in detail in the embodiment related to the apparatus, and will not be elaborated here.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A vehicle control unit, characterized in that the vehicle control unit (10) comprises a control unit (11), a pre-driver (12), and a driving circuit (13), the control unit (11) is connected with the pre-driver (12), the pre-driver (12) is connected with the driving circuit (13), and the driving circuit (13) is connected with a motor (20);

the control unit (11) is used for determining a control signal according to the state information of the vehicle and sending the control signal to the pre-driver (12);

the pre-driver (12) is used for determining a driving signal corresponding to the control signal according to the control signal and sending the driving signal to the driving circuit (13);

the drive circuit (13) is used for controlling the motor (20) to rotate according to the drive signal.

2. Vehicle control unit according to claim 1, characterized in that the drive circuit (13) comprises a first control switch (131), a second control switch (132), a third control switch (133) and a fourth control switch (134);

the control ends of the first control switch (131), the second control switch (132), the third control switch (133) and the fourth control switch (134) are connected with the pre-driver (12), the first end of the first control switch (131) and the first end of the second control switch (132) are connected with the power supply (30), the second end of the first control switch (131) and the first end of the third control switch (133) are connected with the positive pole of the motor (20), the second end of the second control switch (132) and the first end of the fourth control switch (134) are connected with the negative pole of the motor (20), and the second ends of the third control switch (133) and the fourth control switch (134) are connected with the ground.

3. The vehicle control unit according to claim 2, wherein the first control switch (131), the second control switch (132), the third control switch (133) and the fourth control switch (134) are P-channel field effect transistors (PMOS);

the gate of the PMOS is used as the control end of a target control switch, the source of the PMOS is used as the first end of the target control switch, the drain of the PMOS is used as the second end of the target control switch, and the target control switch is any one of the first control switch (131), the second control switch (132), the third control switch (133) and the fourth control switch (134).

4. The vehicle control unit according to claim 2, wherein the control signals include Pulse Width Modulation (PWM) signals, direction signals, on-off signals;

the PWM signals are used for controlling the turn-on duration of the first control switch (131), the second control switch (132), the third control switch (133) and the fourth control switch (134), the direction signals are used for controlling the rotation direction of the motor (20), and the on-off signals are used for controlling the turn-on or turn-off of the first control switch (131), the second control switch (132), the third control switch (133) and the fourth control switch (134).

5. The vehicle control unit according to claim 4, characterized in that the pre-driver (12) comprises a first control pin (121), a second control pin (122) and a third control pin (123), and the control unit (11) is connected with the first control pin (121), the second control pin (122) and the third control pin (123), respectively;

the control unit (11) is configured to send the PWM signal to the pre-driver (12) through the first control pin (121);

the control unit (11) is configured to send the direction signal to the pre-driver (12) through the second control pin (122);

the control unit (11) is configured to send the on-off signal to the pre-driver (12) through the third control pin (123).

6. The vehicle control unit according to claim 5, wherein the control signals further include a braking signal for controlling braking of the motor (20); the pre-driver (12) further comprises a communication pin (124), the control unit (11) being connected with the communication pin (124);

the control unit (11) is used for sending the brake signal to the pre-driver (12) through the communication pin (124).

7. Vehicle control unit according to claim 1, characterized in that the vehicle control unit (10) further comprises a power management unit (14), the power management unit (14) being connected to the control unit (11), the pre-driver (12) and the power source (30), respectively, the pre-driver (12) being connected to the power source (30).

8. Vehicle control unit according to any of claims 1-7, characterized in that the control unit (11) is a Micro Control Unit (MCU) and the pre-driver (12) is an L9945 chip.

9. A vehicle, characterized in that the vehicle (40) is provided with a vehicle control unit (10) according to any one of claims 1-8 and an electric machine (20).