Driving circuit control method and system and vehicle

Abstract

The invention provides a driving circuit control method and system and a vehicle, and the method comprises the steps: responding to a driving circuit control instruction, and entering a vehicle window driving mode or a wireless charging mode; under the condition of the vehicle window driving mode, the battery voltage is adjusted to be first voltage through the voltage converter and then output to the driving circuit, the driving circuit drives the motor to rotate, and the vehicle window is controlled to ascend or descend; under the condition of a wireless charging mode, the voltage converter adjusts the battery voltage into a second voltage and outputs the second voltage to the driving circuit, and the driving circuit activates the resonance circuit to generate resonance to transmit electric energy. The driving circuit for controlling the vehicle window can be reused for wireless charging, the problem that repeated components cannot be reused due to the fact that the vehicle window driving circuit and the wireless charging module are designed separately is solved, and the circuit cost is reduced. By sharing the voltage converter, the problem of large space occupation caused by discrete design between the vehicle window driving circuit and the wireless charging module is solved.

Description

Technical Field

[0001] This application relates to the field of circuit technologies, and particularly to a method and system for controlling a drive circuit, and a vehicle. Background Art

[0002] When designing the power supply system for some vehicles, the window drive circuit and the wireless charging module are designed separately. The window drive circuit is used to control the movement of the window, and the wireless charging module is used for wireless charging. Since the window drive circuit and the wireless charging module are designed separately, it results in a large occupied space, and there are duplicate components, and component reuse cannot be carried out, which increases the cost. In addition, the vehicle power supply system is difficult to effectively meet the requirements for multiple voltage levels and lacks intelligent control. Summary of the Invention

[0003] In view of the above-mentioned disadvantages of the prior art, the purpose of this application is to provide a method and system for controlling a drive circuit, and a vehicle, which are used to solve the technical problems existing in the prior art.

[0004] To achieve the above object and other related objects, this application provides a method for controlling a drive circuit, including the following steps: In response to a drive circuit control instruction, enter the window drive mode or the wireless charging mode; Under the condition of the window drive mode, adjust the battery voltage to a first voltage through a voltage converter and output it to the drive circuit, and drive the motor to rotate through the drive circuit to control the window to rise or fall; Under the condition of the wireless charging mode, adjust the battery voltage to a second voltage through the voltage converter and output it to the drive circuit, and activate a resonant circuit through the drive circuit to generate resonance and transmit electric energy; wherein, the resonant circuit includes a coil.

[0005] In an embodiment of this application, the process of entering the window drive mode or the wireless charging mode in response to a drive circuit control instruction includes: Under the condition that the window control button is triggered, generate a drive circuit control instruction for controlling the window according to a preset communication protocol; and transmit the drive circuit control instruction for controlling the window to a microcontroller for response, so that the microcontroller enters the window drive mode; wherein, the preset communication protocol includes the Controller Area Network protocol, and the voltage converter is controlled by the microcontroller; Alternatively, under the condition that a wireless charging device is placed in a preset area, a driving circuit control instruction for generating resonance is generated according to the preset communication protocol, and the driving circuit control instruction for generating resonance is transmitted to a microcontroller for response, so that the microcontroller enters the wireless charging mode; wherein, the preset area is determined according to the positions of the coil and the window.

[0006] In an embodiment of the present application, the process of entering the window driving mode or the wireless charging mode in response to the driving circuit control instruction further includes: If a wireless charging device is placed in the preset area when the microcontroller enters the window driving mode, the microcontroller continues to maintain the window driving mode, and after the window is raised or lowered, it switches to the wireless charging mode; If the window control button is triggered when the microcontroller enters the wireless charging mode, the microcontroller directly switches from the wireless charging mode to the window driving mode.

[0007] In an embodiment of the present application, the process of driving the motor to rotate through the driving circuit to control the window to rise or fall includes: The driving circuit drives the motor to rotate forward according to the first voltage and the first pulse width modulation parameter to control the window to rise; Alternatively, the driving circuit drives the motor to rotate reversely according to the first voltage and the first pulse width modulation parameter to control the window to fall; Wherein, the first pulse width modulation parameter is transmitted from the microcontroller to the driving circuit.

[0008] In an embodiment of the present application, the method further includes: Under the condition that the second voltage is less than the first voltage threshold, after reducing the output power of the driving circuit, the resonance circuit is activated by the driving circuit to generate resonance; Under the condition that the second voltage is greater than the second voltage threshold, the frequency of resonance generated by the resonance circuit is increased; Wherein, the first voltage threshold and the second voltage threshold are obtained based on the second voltage, and the second voltage threshold is greater than the first voltage threshold.

[0009] In an embodiment of the present application, if the driving circuit includes a switching component, the method further includes: Performing an abnormal state detection on the switching component in the driving circuit, where the abnormal state includes overcurrent or overheating; Under the condition that the switching component is overcurrent, disconnect the switching component or blow the fuse of the battery; wherein, the battery is used to provide the battery voltage. Under the condition that the switching component is overheated, disconnect the switching component. Wherein, the switching component includes an N-channel MOS field effect transistor or a P-channel MOS field effect transistor.

[0010] This application also provides a drive circuit control system, which is applied to the drive circuit control method described in any one of the above, and the drive circuit control system includes: A microcontroller, which is used to respond to the drive circuit control instruction for controlling the window and enter the window drive mode; or respond to the drive circuit control instruction for generating resonance and enter the wireless charging mode. A voltage converter, which is connected to the battery and the microcontroller, and is used to adjust the battery voltage to a first voltage and output it to the drive circuit under the condition that the microcontroller enters the window drive mode, or adjust the battery voltage to a second voltage and output it to the drive circuit under the condition that the microcontroller enters the wireless charging mode; wherein, the battery voltage is provided by the battery, and the first voltage is less than the second voltage. A drive circuit, which is used to drive the motor to rotate according to the first voltage to control the window to rise or fall; or activate the resonance circuit to generate resonance according to the second voltage to transmit electric energy; wherein, the resonance circuit includes a coil.

[0011] In an embodiment of this application, the drive circuit includes four field effect transistors and a driver for controlling the conduction or cut-off of the four field effect transistors. The driver is respectively connected to the microcontroller, the voltage converter and the gates of the four field effect transistors; if the four field effect transistors are respectively denoted as the first field effect transistor, the second field effect transistor, the third field effect transistor and the fourth field effect transistor, then the drains of the first field effect transistor and the third field effect transistor are both connected to the voltage converter, the sources of the second field effect transistor and the fourth field effect transistor are both grounded, the source of the first field effect transistor is connected to the drain of the second field effect transistor, the source of the third field effect transistor is connected to the drain of the fourth field effect transistor, there is a first drive output between the source of the first field effect transistor and the drain of the second field effect transistor, there is a second drive output between the source of the third field effect transistor and the drain of the fourth field effect transistor, and the motor or the coil is connected between the first drive output and the second drive output.

[0012] In an embodiment of the present application, the drive circuit control system further includes a switch selection circuit disposed between the first drive output and the second drive output. The switch selection circuit includes a Darlington transistor and a relay. The Darlington transistor is respectively connected to the microcontroller and the relay, and the relay is also connected to the first drive output and the second drive output. Wherein, the Darlington transistor controls the relay to be attracted or disconnected according to the signal instruction of the microcontroller, and selects the motor or the coil to conduct.

[0013] The present application also provides a vehicle, which includes the drive circuit control system as described in any one of the above.

[0014] As described above, the present application provides a drive circuit control method, system and vehicle, which have the following beneficial effects: The present application enters the window drive mode by responding to the drive circuit control instruction for controlling the window; or enters the wireless charging mode by responding to the drive circuit control instruction for generating resonance. Under the condition of the window drive mode, the battery voltage is adjusted to a first voltage by a voltage converter and then output to the drive circuit, and the drive circuit drives the motor to rotate to control the window to rise or fall. Under the condition of the wireless charging mode, the battery voltage is adjusted to a second voltage by a voltage converter and then output to the drive circuit, and the drive circuit activates the resonance circuit to generate resonance and transmit electric energy, so that the wireless charging device performs wireless charging according to the electric energy transmitted by the resonance circuit. It can be seen that the present application can reuse the drive circuit for controlling the window lifting movement for wireless charging, which not only solves the problem that the window drive circuit and the wireless charging module are separately designed and cannot reuse redundant components, but also reduces the circuit cost. At the same time, by sharing the voltage converter, the problem of large space occupation caused by the separate design of the window drive circuit and the wireless charging module is solved. Moreover, under the condition of being compatible with the existing electronic and electrical architecture, by switching between the window drive mode and the wireless charging mode, more scenario requirements can be met according to the intelligent control method. Description of the Drawings

[0015] Figure 1 It is a schematic flow chart of the drive circuit control method provided by an embodiment of the present application; Figure 2 It is a schematic circuit connection diagram of the drive circuit control system provided by an embodiment of the present application; Figure 3 It is a schematic connection diagram of the switch selection circuit provided by an embodiment of the present application; Figure 4 It is a schematic control flow chart of the drive circuit control system provided by an embodiment of the present application. Detailed Embodiments

[0016] The following describes the implementation manners of the present application through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It can be understood that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. In addition, it can be understood that the drawings provided in the following embodiments only illustrate the basic concept of the present application schematically. Therefore, only the components related to the present application are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0017] Figure 1 The flowchart of a driving circuit control method is shown. Specifically, in an exemplary embodiment, as Figure 1 shown, this embodiment provides a driving circuit control method, and the method includes the following steps: S110, in response to a driving circuit control instruction, enter a window driving mode or a wireless charging mode; S120-1, under the condition of the window driving mode, adjust the battery voltage to a first voltage through a voltage converter and then output it to the driving circuit, and drive the motor to rotate through the driving circuit to control the window to rise or fall; S120-2, under the condition of the wireless charging mode, adjust the battery voltage to a second voltage through a voltage converter and then output it to the driving circuit, and activate a resonant circuit through the driving circuit to generate resonance and transmit electric energy; wherein, the resonant circuit includes a coil.

[0018] In some exemplary embodiments, the coil in the resonant circuit can be embedded in the left front door panel, right front door panel, left rear door panel, and / or right rear door panel of the vehicle. Among them, the type of the coil in the resonant circuit can be selected or set according to the actual application scenario, and no specific limitation is made here. For example, as some examples, the coil in the resonant circuit can be an FOD (Foreign Object Detection) type coil. As some other examples, the coil in the resonant circuit can also be a planar spiral coil, and the wire diameter of the planar spiral coil can be 0.5 mm Litz wire, and the quality factor Q value is greater than 200.

[0019] In some exemplary embodiments, the driving circuit control instruction can be generated by other controllers (such as the cockpit domain controller, etc.) and transmitted to the microcontroller through the Controller Area Network (CAN) communication protocol, and then the microcontroller (Microcontroller Unit, MCU) responds to enter the window driving mode or the wireless charging mode. As some examples, the ways for other controllers to generate the driving circuit control instruction can include: under the condition that the window control button is triggered, the cockpit domain controller generates a first driving circuit control instruction for controlling the window according to the CAN communication protocol, and at the same time, the cockpit domain controller transmits the first driving circuit control instruction to the microcontroller for response, so that the microcontroller enters the window driving mode. Among them, the window control button can be a mechanical physical button or a virtual button set on the display screen. The type of the window control button is not limited here and can be selected or set according to the actual application scenario. As some other examples, the ways for other controllers to generate the driving circuit control instruction can also include: under the condition that a wireless charging device is placed in a preset area, the cockpit domain controller generates a second driving circuit control instruction for generating resonance according to the CAN communication protocol, and at the same time, the cockpit domain controller transmits the second driving circuit control instruction to the microcontroller for response, so that the microcontroller enters the window driving mode. Among them, the preset area can be determined according to the positions of the coil and the window in the resonance circuit. For example, the surface area of the vehicle left front door panel, right front door panel, left rear door panel and / or right rear door panel mapped by the coil can be used as the corresponding preset area. For another example, one or more grooves can be designed in the corresponding mechanical structures of the vehicle left front door panel, right front door panel, left rear door panel and / or right rear door panel as the foregoing preset area. Among them, the position where the groove is located needs to be able to receive the electric energy transmitted by the resonance circuit.

[0020] In some exemplary embodiments, the voltage converter may be constituted by a buck-boost converter (hereinafter referred to as a Buck-Boost converter). Among them, the Buck-Boost converter is a direct current-direct current (DC-DC) converter. The Buck-Boost converter can convert the input DC voltage and output it. The output DC voltage can be higher or lower than the input DC voltage. As some examples, the Buck-Boost converter can be controlled by a microcontroller. In addition, the Buck-Boost converter can also directly receive the pulse width modulation (Pulse Width Modulation, hereinafter referred to as PWM) parameters transmitted by the microcontroller. For example, the pulse width modulation parameters received by the Buck-Boost converter can be denoted as PWM1 parameters, hereinafter referred to as PWM1. Among them, the PWM1 parameters can be used to control the rotational speed when the motor rotates. As some other examples, the Buck-Boost converter can be a four-phase interleaved Buck-Boost circuit composed of four groups of parallel Buck-Boost units. Each group of Buck-Boost units includes two complementary controlled switching tubes (such as field effect tubes), an inductor, a capacitor, and a freewheeling diode. The four groups of Buck-Boost units work alternately with a 90° phase difference to form an interleaved parallel structure. In addition, as some examples, the output range of the voltage converter can be set or selected according to the actual application scenario. For example, the output range of the voltage converter can be 5V to 48V to assist in solving the problem of multi-voltage requirements for new energy vehicles in the related art.

[0021] In some exemplary embodiments, the battery voltage may be the DC voltage provided by the storage battery in the vehicle. Among them, the magnitude of the DC voltage provided by the storage battery can be selected or set according to the actual application scenario, and no specific numerical limit is imposed on the battery voltage here. In addition, the specific numerical values of the first voltage and the second voltage can be selected or set according to the actual application scenario, and no specific numerical limit is imposed on the first voltage and the second voltage here. Among them, the first voltage can be less than the second voltage. For example, as some examples, the 10V DC voltage provided by the storage battery can be used as the battery voltage. The voltage converter can also boost and adjust the 10V DC voltage provided by the storage battery to 12V DC voltage and output it as the first voltage. The voltage converter can also boost and adjust the 10V DC voltage provided by the storage battery to 15V DC voltage and output it as the second voltage. That is, the first voltage can be 12V DC voltage, and the second voltage can be 15V DC voltage.

[0022] In some exemplary embodiments, the drive circuit may be a window motor drive circuit in a vehicle for controlling the raising and lowering of a window, and the motor may be a window motor for controlling the window to rise or fall. For example, the aforementioned motor may be a window motor provided in the left front door panel, right front door panel, left rear door panel, and / or right rear door panel of the vehicle. In addition, the drive circuit may directly receive the pulse width modulation parameters transmitted by the microcontroller. For example, the pulse width modulation parameters received by the drive circuit may be denoted as PWM2 parameters, abbreviated as PWM2. Among them, the PWM2 parameters can be used for circuit protection of the drive circuit. As some examples, the drive circuit may include four MOS field effect transistors (Metal-Oxide-Semiconductor Field-Effect Transistor, abbreviated as MOSFET or MOS field effect transistor), and a driver for controlling the conduction or cutoff of these four MOS field effect transistors. Among them, the driver is respectively connected to the microcontroller, the voltage converter, and the gates of the four MOS field effect transistors; if these four MOS field effect transistors are respectively denoted as the first MOS field effect transistor, the second MOS field effect transistor, the third MOS field effect transistor, and the fourth MOS field effect transistor, then the driver is respectively connected to the gate of the first MOS field effect transistor, the gate of the second MOS field effect transistor, the gate of the third MOS field effect transistor, and the gate of the fourth MOS field effect transistor, and the drains of the first MOS field effect transistor and the third MOS field effect transistor are both connected to the voltage converter, the sources of the second MOS field effect transistor and the fourth MOS field effect transistor are both grounded, the source of the first MOS field effect transistor is connected to the drain of the second MOS field effect transistor, the source of the third MOS field effect transistor is connected to the drain of the fourth MOS field effect transistor, there is a first drive output between the source of the first MOS field effect transistor and the drain of the second MOS field effect transistor, there is a second drive output between the source of the third MOS field effect transistor and the drain of the fourth MOS field effect transistor, and a motor or a coil is connected between the first drive output and the second drive output. Among them, the four MOS field effect transistors in the aforementioned drive circuit may be N-channel MOS field effect transistors or P-channel MOS field effect transistors, and the driver may be a gate driver. As some examples, if the four MOS field effect transistors in the aforementioned drive circuit are all N-channel MOS field effect transistors, then when the first MOS field effect transistor and the fourth MOS field effect transistor are conducting and the second MOS field effect transistor and the third MOS field effect transistor are cutoff, the motor rotates normally, and this rotation direction is denoted as the forward direction. When the second MOS field effect transistor and the third MOS field effect transistor are conducting and the first MOS field effect transistor and the fourth MOS field effect transistor are cutoff, the motor rotates normally, and this rotation direction is denoted as the reverse direction.When the first MOS field-effect transistor and the third MOS field-effect transistor are turned on and the second MOS field-effect transistor and the fourth MOS field-effect transistor are turned off, the motor does not rotate. When the second MOS field-effect transistor and the fourth MOS field-effect transistor are turned on and the first MOS field-effect transistor and the third MOS field-effect transistor are turned off, the motor does not rotate.

[0023] In some exemplary embodiments, a common-mode choke coil can also be added to the drive circuit to reduce the radiated EMI in the drive circuit through the common-mode choke coil. Among them, the impedance of the common-mode choke coil can be greater than 1 KΩ.

[0024] In some exemplary embodiments, in response to a drive circuit control instruction, the process of entering the window drive mode or the wireless charging mode may further include: if a wireless charging device is placed in a preset area when the microcontroller enters the window drive mode, the microcontroller continues to maintain the window drive mode, and after the window is raised or lowered, it switches to the wireless charging mode. If the window control button is triggered when the microcontroller enters the wireless charging mode, the microcontroller directly switches from the wireless charging mode to the window drive mode. It can be seen from this that for the window drive mode and the wireless charging mode, the priority of the window drive mode is higher than that of the wireless charging mode. Therefore, after the microcontroller enters the wireless charging mode, if the driver or passenger raises or lowers the window, the microcontroller will directly cut off the wireless charging mode and then enter the window drive mode to drive the window motor to control the window to raise or lower. After the microcontroller enters the window drive mode or when the window is being raised or lowered, even if a wireless charging device is placed in the preset area, it is still necessary to switch to the wireless charging mode after the window is raised or lowered.

[0025] In some exemplary embodiments, the process of driving the motor to rotate through the drive circuit to control the window to rise or fall includes: driving the motor to rotate forward through the drive circuit according to the first voltage and the first pulse width modulation parameter to control the window to rise; or driving the motor to rotate backward through the drive circuit according to the first voltage and the first pulse width modulation parameter to control the window to fall; where the first pulse width modulation parameter is transmitted from the microcontroller to the drive circuit, and the first pulse width modulation parameter can be used to control the rotation speed of the motor when it rotates. As some examples, when the motor rotates clockwise, it is recorded as the motor rotating forward; when the motor rotates counterclockwise, it is recorded as the motor rotating backward. As some other examples, when the motor rotates clockwise, it can also be recorded as the motor rotating backward; when the motor rotates counterclockwise, it can be recorded as the motor rotating forward. As some other examples, the forward rotation and backward rotation of the motor can also be defined according to the direction of the current flowing through the motor, and the corresponding current directions when the motor rotates forward and backward can be set or selected according to the actual application scenario, and the current direction is not specifically limited here.

[0026] In some exemplary embodiments, the driving circuit control method may further include: under the condition that the second voltage is less than the first voltage threshold, reducing the output power of the driving circuit and then activating the resonant circuit through the driving circuit to generate resonance; under the condition that the second voltage is greater than the second voltage threshold, increasing the frequency of resonance generated by the resonant circuit; wherein, the first voltage threshold and the second voltage threshold are obtained based on the second voltage, and the second voltage threshold is greater than the first voltage threshold. For example, the first voltage threshold and the second voltage threshold can be set according to multiples of the second voltage, so the specific values of the first voltage threshold and the second voltage threshold are not limited herein. As some examples, 0.9 times the corresponding value of the second voltage can be used as the first voltage threshold, and 1.05 times the corresponding value of the second voltage can be used as the second voltage threshold. Therefore, when activating the resonant circuit to generate resonance according to the second voltage, by comparing the second voltage with the first voltage threshold and the second voltage threshold, low-power derating output can be performed when the second voltage is less than the first voltage threshold, and high-power charging speed can be increased when the second voltage is greater than the second voltage threshold.

[0027] In some exemplary embodiments, if the driving circuit includes switching components, the driving circuit control method may further include: detecting an abnormal state of the switching components in the driving circuit, where the abnormal state includes overcurrent or overheating; under the condition that the switching component is in overcurrent, disconnecting the switching component or blowing a fuse for the battery; wherein, the battery is used to provide the battery voltage; under the condition that the switching component is in overheating, disconnecting the switching component; wherein, the switching component includes an N-channel MOS field-effect transistor or a P-channel MOS field-effect transistor. Specifically, as some examples, when detecting the abnormal state of the switching components in the driving circuit, it can be detected by the chip constituting the switching component, or by adding a sampling circuit. Herein, the chip model of the switching component and the specific circuit connection of the sampling circuit are not specifically limited, and relevant technologies can be referred to in actual application scenarios. Therefore, by detecting the abnormal state of the switching components in the driving circuit, primary protection and secondary protection can be performed on the driving circuit, that is, under the condition that the switching component is in overcurrent or overcurrent, the driving circuit is primarily protected by disconnecting the switching component; under the condition that the switching component is in overcurrent, secondary protection is performed by blowing a fuse for the battery, so that dual-channel redundant protection can be performed, increasing the safety of the driving circuit.

[0028] In some exemplary embodiments, the driving circuit control method may further include performing multi-modal switching. Specifically, if the pressing of the window control button is used as a trigger condition, the action sequence of the microcontroller at this time may be to immediately cut off the charging, and softly drive the motor according to the pulse width modulation parameters corresponding to the window driving mode, and the response time of the current trigger condition is less than 50 ms. If the controller area network sleep instruction is used as a trigger condition, the action sequence of the microcontroller at this time may be to maintain charging until the state of charge (SOC) of the battery reaches 80%, and then enter the low power consumption mode, and the response time of the current trigger condition can be set or configured by itself. If the triggering of the vehicle collision signal is used as a trigger condition, the action sequence of the microcontroller at this time may be to forcibly cut off all outputs and activate the safety power supply in the vehicle, and the response time of the current trigger condition is less than 10 ms. It can be seen that through multi-mode intelligent switching, seamless switching between the window driving mode and the wireless charging mode can be achieved under the condition of being compatible with the existing electronic and electrical architecture, and the switching time is <100 ms, which can meet more scenario requirements under the condition of dynamic energy management.

[0029] In summary, the present application provides a driving circuit control method. By responding to the driving circuit control instruction for controlling the window, it enters the window driving mode; or by responding to the driving circuit control instruction for generating resonance, it enters the wireless charging mode. Under the condition of the window driving mode, the battery voltage is adjusted to a first voltage by a voltage converter and then output to the driving circuit, and the driving circuit drives the motor to rotate to control the window to rise or fall. Under the condition of the wireless charging mode, the battery voltage is adjusted to a second voltage by a voltage converter and then output to the driving circuit, and the driving circuit activates the resonance circuit to generate resonance and transmit electric energy, so that the wireless charging device performs wireless charging according to the electric energy transmitted by the resonance circuit. It can be seen that this method can reuse the driving circuit for controlling the window lifting movement to perform wireless charging, which not only solves the problem that the window driving circuit and the wireless charging module are separately designed and cannot reuse redundant components, but also reduces the circuit cost. At the same time, by sharing the voltage converter, the problem of large space occupation caused by the separate design of the window driving circuit and the wireless charging module is solved. Moreover, under the condition of being compatible with the existing electronic and electrical architecture, through the switching between the window driving mode and the wireless charging mode, more scenario requirements can be met in an intelligent control manner.

[0030] In another exemplary embodiment of the present application, there is also provided a driving circuit control system, which can be applied to the driving circuit control method described in the above exemplary embodiments. As Figure 2 shown, the control system includes: A microcontroller, which responds to a drive circuit control instruction for controlling a window to enter a window drive mode; or responds to a drive circuit control instruction for generating resonance to enter a wireless charging mode; A voltage converter, connected to a battery and the microcontroller, is configured to adjust the battery voltage to a first voltage and output it to the drive circuit under the condition that the microcontroller enters the window drive mode, or adjust the battery voltage to a second voltage and output it to the drive circuit under the condition that the microcontroller enters the wireless charging mode; wherein, the battery voltage is provided by the battery, and the first voltage is less than the second voltage; A drive circuit, which is configured to drive a motor to rotate according to the first voltage to control the window to rise or fall; or activate a resonance circuit to generate resonance according to the second voltage to transmit electric energy; wherein, the resonance circuit includes a coil.

[0031] According to the above description, as Figure 2 shown, the battery voltage can be provided by a storage battery in the vehicle, the voltage converter can be composed of a Buck-Boost converter, and the Buck-Boost converter is connected to the VBAT (Voltage of Battery) terminal of the storage battery. At the same time, the drive circuit control instruction for controlling the window and / or the drive circuit control instruction for generating resonance can be generated by another controller (such as a cockpit domain controller, etc.) and transmitted to the microcontroller through the Controller Area Network communication protocol, and then the microcontroller responds to enter the window drive mode or the wireless charging mode. In addition, the microcontroller can also transmit the pulse width modulation parameter corresponding to the rotation speed when controlling the motor rotation to the Buck-Boost converter, denoted as PWM1 parameter or PWM1; the microcontroller can also transmit the pulse width modulation parameter for circuit protection of the drive circuit to the drive circuit, denoted as PWM2 parameter or PWM2. In Figure 2 , the drive circuit can be an H-Bridge Driver drive circuit (abbreviated as H-bridge drive circuit), wherein, Q1 can be represented as the first MOS field effect transistor, Q2 can be represented as the second MOS field effect transistor, Q3 can be represented as the third MOS field effect transistor, and Q4 can be represented as the fourth MOS field effect transistor. In Figure 2 , Q1, Q2, Q3, and Q4 are all N-channel MOS field effect transistors. At the same time, data transmission or communication can also be carried out between the microcontroller and the H-bridge drive circuit through SPI (Serial Peripheral Interface, abbreviated as SPI). Among them, the H-bridge drive circuit can be a window motor drive circuit in the vehicle for controlling the window to rise and fall, and the motor can be a window motor for controlling the window to rise or fall. For example, Figure 2The motor M therein may be a window motor provided in the left front door panel, right front door panel, left rear door panel, and / or right rear door panel of the vehicle. The coil in the resonant circuit may be embedded in the left front door panel, right front door panel, left rear door panel, and / or right rear door panel of the vehicle. In addition, Figure 2 The coil and capacitor therein may form an LC resonant circuit, and the corresponding coil may be an FOD type coil or a planar spiral coil.

[0032] In some exemplary embodiments, the aforementioned drive circuit or H-bridge drive circuit may include four field effect transistors and a driver for controlling the conduction or cutoff of the four field effect transistors. Among them, the driver is respectively connected to the microcontroller, the voltage converter, and the gates of the four field effect transistors; if the four field effect transistors are respectively denoted as the first field effect transistor, the second field effect transistor, the third field effect transistor, and the fourth field effect transistor, then the driver is respectively connected to the gate of the first field effect transistor, the gate of the second field effect transistor, the gate of the third field effect transistor, and the gate of the fourth field effect transistor, and the drains of the first field effect transistor and the third field effect transistor are both connected to the voltage converter, the sources of the second field effect transistor and the fourth field effect transistor are both grounded, the source of the first field effect transistor is connected to the drain of the second field effect transistor, the source of the third field effect transistor is connected to the drain of the fourth field effect transistor, there is a first drive output between the source of the first field effect transistor and the drain of the second field effect transistor, there is a second drive output between the source of the third field effect transistor and the drain of the fourth field effect transistor, and a motor or a coil is connected between the first drive output and the second drive output. Among them, the four MOS field effect transistors in the drive circuit or H-bridge drive circuit may be N-channel MOS field effect transistors or P-channel MOS field effect transistors, and the driver may be a gate driver. As some examples, if the four MOS field effect transistors in the drive circuit or H-bridge drive circuit are all N-channel MOS field effect transistors, then when the first field effect transistor and the fourth field effect transistor are conducting and the second field effect transistor and the third field effect transistor are cutoff, the motor rotates normally, and this rotation direction is denoted as the forward direction. When the second field effect transistor and the third field effect transistor are conducting and the first field effect transistor and the fourth field effect transistor are cutoff, the motor rotates normally, and this rotation direction is denoted as the reverse direction. When the first field effect transistor and the third field effect transistor are conducting and the second field effect transistor and the fourth field effect transistor are cutoff, the motor does not rotate. When the second field effect transistor and the fourth field effect transistor are conducting and the first field effect transistor and the third field effect transistor are cutoff, the motor does not rotate.

[0033] In some exemplary embodiments, the drive circuit control system further includes a switch selection circuit disposed between the first drive output and the second drive output. The switch selection circuit includes a Darlington transistor and a relay. The Darlington transistor is respectively connected to the microcontroller and the relay, and the relay is also connected to the first drive output and the second drive output. Among them, the Darlington transistor controls the relay to be attracted or disconnected according to the signal instruction of the microcontroller, and selects the motor or the coil to conduct, as Figure 2 shown, the switch selection circuit is connected between the H-bridge drive circuit and the motor or the coil, and can select to conduct the H-bridge drive circuit and the motor, or select to conduct the H-bridge drive circuit and the coil. At the same time, as Figure 3 shown, the output terminal of the H-bridge drive circuit is connected to the relay in the switch selection circuit, and the Darlington transistor in the switch selection circuit is connected to the microcontroller. The Darlington transistor receives the enable signal transmitted by the microcontroller, controls the relay to be attracted or disconnected, and selects to conduct the motor and disconnect the coil, or select to disconnect the motor and conduct the coil. As some examples, when the microcontroller enters the window drive mode, the relay selects to conduct the motor and disconnect the coil, so that the motor rotates after being driven by the first voltage to control the window to rise or fall. When the microcontroller enters the wireless charging mode, the relay selects to conduct the coil and disconnect the motor, so that the LC resonance circuit is activated to generate resonance according to the second voltage, and wirelessly charges the wireless charging device by transmitting electric energy.

[0034] According to the above description, in some exemplary embodiments, the control flow of the foregoing drive circuit control system is as Figure 4As shown. Specifically, the drive circuit control system is initialized after power-on. The microcontroller detects the Controller Area Network (CAN) bus instructions to determine whether the CAN bus instructions belong to the drive circuit control instructions for controlling the window or the drive circuit control instructions for generating resonance. Among them, the drive circuit control instructions for controlling the window can be generated when controlling according to the window control button, and the drive circuit control instructions for generating resonance can be generated when the wireless charging device is placed in the preset area. If the CAN bus instructions belong to the drive circuit control instructions for controlling the window, the microcontroller enters the window drive mode after responding to the corresponding drive circuit control instructions. If the CAN bus instructions belong to the drive circuit control instructions for generating resonance, the microcontroller enters the wireless charging mode after responding to the corresponding drive circuit control instructions. In the window drive mode, the relay in the switch selection circuit closes switches K1 and K2 according to the enable signal of the microcontroller. At the same time, the Buck-Boost converter boosts and adjusts the 10V DC battery voltage provided by the battery to 12V DC voltage and outputs it to the H-bridge drive circuit. And the microcontroller outputs the PWM1 parameter to the Buck-Boost converter, and then the H-bridge drive circuit controls the motor to rotate to raise or lower the window. In the wireless charging mode, the relay in the switch selection circuit closes switches K3 and K4 according to the enable signal of the microcontroller. At the same time, the Buck-Boost converter boosts and adjusts the 10V DC battery voltage provided by the battery to 15V DC voltage and outputs it to the H-bridge drive circuit. And the microcontroller outputs the PWM2 parameter to the H-bridge drive circuit, and then the H-bridge drive circuit activates the LC resonance circuit to generate a resonance of 1MHz to transmit electrical energy and wirelessly charge the wireless charging device located in the preset area. In addition, if a wireless charging device is placed in the preset area under the condition that the microcontroller enters the window drive mode, the microcontroller continues to maintain the window drive mode and switches to the wireless charging mode after the window is raised or lowered. If the window control button is triggered under the condition that the microcontroller enters the wireless charging mode, the microcontroller directly switches from the wireless charging mode to the window drive mode to control the window. After the microcontroller enters the window drive mode or the wireless charging mode, it also detects the abnormal state of the MOS field-effect transistors in the H-bridge drive circuit, including overcurrent or over-temperature detection; under the condition that the MOS field-effect transistor is in overcurrent, disconnect the MOS field-effect transistor or fuse the battery; under the condition that the MOS field-effect transistor is in over-temperature, disconnect the MOS field-effect transistor; among them, the MOS field-effect transistor can be N-channel type or P-channel type.

[0035] It can be understood that the drive circuit control system provided in the above embodiments and the drive circuit control method provided in the above embodiments belong to the same concept. The specific manner of performing operations in the drive circuit control method has been described in detail in the above embodiments and will not be elaborated here. In practical applications, the drive circuit control system provided in the above embodiments can, as needed, allocate the above functions to be completed by different functional modules, that is, divide the internal structure of the drive circuit control system into different functional modules, and then implement all or part of the functions of the corresponding functional modules through the drive circuit control method described in the above embodiments, which will not be specifically elaborated here.

[0036] In summary, the present application provides a drive circuit control system. The microcontroller responds to the drive circuit control instruction for controlling the window to enter the window drive mode; or the microcontroller responds to the drive circuit control instruction for generating resonance to enter the wireless charging mode. The voltage converter is connected to the battery and the microcontroller. Under the condition that the microcontroller enters the window drive mode, the battery voltage is adjusted to a first voltage and then output to the drive circuit. Or, under the condition that the microcontroller enters the wireless charging mode, the battery voltage is adjusted to a second voltage and then output to the drive circuit. The drive circuit drives the motor to rotate according to the first voltage to control the window to rise or fall; or the drive circuit activates the resonance circuit to generate resonance according to the second voltage to transmit electric energy; wherein, the resonance circuit includes a coil. It can be seen that this system can reuse the drive circuit for controlling the window lifting movement for wireless charging, which not only solves the problem that the window drive circuit and the wireless charging module are separately designed and cannot reuse redundant components, but also reduces the circuit cost. At the same time, by sharing the voltage converter, the problem of large space occupation caused by the separate design of the window drive circuit and the wireless charging module is solved. Moreover, under the condition of being compatible with the existing electronic and electrical architecture, through the switching between the window drive mode and the wireless charging mode, more scenario requirements can be met in an intelligent control manner.

[0037] In another exemplary embodiment of the present application, a vehicle is further provided, and the vehicle includes the drive circuit control system described in the above embodiments. It can be understood that since the specific manner of performing operations in the drive circuit control system has been described in detail in some of the above embodiments, the technical functions and effects of the vehicle provided here can be referred to the above embodiments and will not be elaborated here.

[0038] It can be understood that although terms such as first and second may be used to describe voltages in the embodiments of the present application, these terms are only used to distinguish voltages from each other. For example, without departing from the scope of the embodiments of the present application, the first voltage may also be referred to as the second voltage, and similarly, the second voltage may also be referred to as the first voltage.

[0039] The above embodiments are only illustrative of the principles and effects of the present application and are not intended to limit the present application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed in the present application should still be covered by the claims of the present application.

Claims

1. A driving circuit control method, characterized in that, The method includes the following steps: In response to a driving circuit control instruction, enter a window driving mode or a wireless charging mode; Under the condition of the window driving mode, adjust the battery voltage to a first voltage through a voltage converter and output it to the driving circuit, and drive the motor to rotate through the driving circuit to control the window to rise or fall; Under the condition of the wireless charging mode, adjust the battery voltage to a second voltage through the voltage converter and output it to the driving circuit, and activate a resonant circuit through the driving circuit to generate resonance and transmit electric energy; wherein, the resonant circuit includes a coil.

2. The driving circuit control method according to claim 1, wherein The process of entering the window driving mode or the wireless charging mode in response to a driving circuit control instruction includes: Under the condition that a window control button is triggered, generate a driving circuit control instruction for controlling the window according to a preset communication protocol; and transmit the driving circuit control instruction for controlling the window to a microcontroller for response, so that the microcontroller enters the window driving mode; wherein, the preset communication protocol includes a controller area network protocol, and the voltage converter is controlled by the microcontroller; Or, under the condition that a wireless charging device is placed in a preset area, generate a driving circuit control instruction for generating resonance according to the preset communication protocol, and transmit the driving circuit control instruction for generating resonance to the microcontroller for response, so that the microcontroller enters the wireless charging mode; wherein, the preset area is determined according to the position of the coil and the window.

3. The drive circuit control method according to claim 2, wherein The process of entering the window driving mode or the wireless charging mode in response to a driving circuit control instruction further includes: If a wireless charging device is placed in the preset area under the condition that the microcontroller enters the window driving mode, the microcontroller continues to maintain the window driving mode, and after the window rises or falls, switches to the wireless charging mode; If the window control button is triggered under the condition that the microcontroller enters the wireless charging mode, the microcontroller directly switches from the wireless charging mode to the window driving mode.

4. The drive circuit control method according to any one of claims 1 to 3, characterized in that, The process of driving the motor to rotate through the driving circuit to control the window to rise or fall includes: Drive the motor to rotate forward through the driving circuit according to the first voltage and a first pulse width modulation parameter to control the window to rise; Or, drive the motor to rotate reversely through the driving circuit according to the first voltage and the first pulse width modulation parameter to control the window to fall; Wherein, the first pulse width modulation parameter is transmitted from the microcontroller to the driving circuit.

5. The driving circuit control method according to claim 1, wherein The method further includes: Under the condition that the second voltage is less than a first voltage threshold, reduce the output power of the driving circuit and then activate the resonant circuit through the driving circuit to generate resonance; Under the condition that the second voltage is greater than a second voltage threshold, increase the frequency of resonance generated by the resonant circuit; Wherein, the first voltage threshold and the second voltage threshold are obtained based on the second voltage, and the second voltage threshold is greater than the first voltage threshold.

6. The drive circuit control method according to claim 1, characterized in that If the drive circuit includes a switching component, the method further includes: Detecting an abnormal state of the switching component in the drive circuit, where the abnormal state includes overcurrent or overtemperature; Under the condition that the switching component is in an overcurrent state, disconnecting the switching component or blowing a fuse of the battery; where the battery is used to provide the battery voltage; Under the condition that the switching component is in an overtemperature state, disconnecting the switching component; Wherein, the switching component includes an N-channel MOS field effect transistor or a P-channel MOS field effect transistor.

7. A drive circuit control system is applied to the drive circuit control method described in any one of the above claims 1 to 6, and is characterized in that, The drive circuit control system includes: A microcontroller, configured to enter a window drive mode in response to a drive circuit control instruction for controlling a window; or enter a wireless charging mode in response to a drive circuit control instruction for generating resonance; A voltage converter, connected to the battery and the microcontroller, configured to adjust the battery voltage to a first voltage and output it to the drive circuit under the condition that the microcontroller enters the window drive mode, or adjust the battery voltage to a second voltage and output it to the drive circuit under the condition that the microcontroller enters the wireless charging mode; where the battery voltage is provided by the battery, and the first voltage is less than the second voltage; A drive circuit, configured to drive a motor to rotate according to the first voltage to control the window to rise or fall; or activate a resonance circuit to generate resonance and transmit electric energy according to the second voltage; where the resonance circuit includes a coil.

8. The drive circuit control system according to claim 7, wherein The drive circuit includes four field effect transistors and a driver for controlling the four field effect transistors to conduct or cut off. The driver is respectively connected to the microcontroller, the voltage converter, and the gates of the four field effect transistors; if the four field effect transistors are respectively denoted as the first field effect transistor, the second field effect transistor, the third field effect transistor, and the fourth field effect transistor, the drains of the first field effect transistor and the third field effect transistor are both connected to the voltage converter, the sources of the second field effect transistor and the fourth field effect transistor are both grounded, the source of the first field effect transistor is connected to the drain of the second field effect transistor, the source of the third field effect transistor is connected to the drain of the fourth field effect transistor, there is a first drive output between the source of the first field effect transistor and the drain of the second field effect transistor, there is a second drive output between the source of the third field effect transistor and the drain of the fourth field effect transistor, and the motor or the coil is connected between the first drive output and the second drive output.

9. The drive circuit control system according to claim 8, wherein, The drive circuit control system further includes a switch selection circuit disposed between the first drive output and the second drive output. The switch selection circuit includes a Darlington transistor and a relay. The Darlington transistor is respectively connected to the microcontroller and the relay, and the relay is also connected to the first drive output and the second drive output; where the Darlington transistor controls the relay to be attracted or disconnected according to a signal instruction of the microcontroller to select the motor or the coil to conduct.

10. A vehicle, characterized in that, The vehicle includes a drive circuit control system as described in any one of claims 7 to 9.

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