A switch control circuit for a vehicle controller

Abstract

The application discloses a kind of switch control circuit of vehicle controller, and the application is related to the field of diesel engine controller, including: circuit controller, precharge circuit and switching circuit, precharge circuit is parallel with switching circuit, and the first output port and the second output port of circuit controller are connected with precharge circuit and switching circuit respectively;Circuit controller is used to receive vehicle controller opening instruction;Based on opening instruction, the pre-charge time of capacitive load is determined;In pre-charge time, first voltage signal is sent to precharge circuit;Precharge circuit is used to charge capacitive load according to first voltage signal;After pre-charge time, circuit controller sends second voltage signal to switching circuit;Switching circuit is used to control vehicle controller to open according to second voltage signal.By applying the technical solution of the present application, the pre-charge circuit can be integrated into the vehicle controller, improving the integration of the vehicle controller.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of diesel engine controller, in particular to a switch control circuit of vehicle controller. BACKGROUND

[0002] With the increasing integration, the vehicle controller needs to provide more and more capacitors. During the power-on process of the vehicle controller, the capacitive load is easy to cause current impact, which will cause the related relay or contactor contact in the system loop to stick, damage the high-voltage device, and instantaneously pull down the controller voltage, resulting in that the controller cannot be normally reset. Therefore, the capacitive load needs to be pre-charged.

[0003] At present, in order to realize the pre-charging of the capacitive load, a suitable relay and a pre-charging resistor are usually selected to design an external pre-charging circuit. However, the external pre-charging circuit cannot be built-in in the vehicle controller, and the integration is low, and when not in use, the relay will be standby consumption, thereby increasing the overall power consumption of the device. SUMMARY

[0004] The present application provides a switch control circuit of vehicle controller, which can integrate the pre-charging circuit into the vehicle controller, so that the pre-charging circuit and the controller switch circuit become a whole control circuit, thereby improving the integration of the vehicle controller and avoiding increasing the overall power consumption of the device.

[0005] According to a first aspect of the embodiment of the present application, a switch control circuit of vehicle controller is provided, comprising: a circuit controller, a pre-charging circuit and a switch circuit, the pre-charging circuit is connected in parallel with the switch circuit, and the first output port and the second output port of the circuit controller are connected with the pre-charging circuit and the switch circuit respectively.

[0006] The circuit controller is configured to receive a vehicle controller opening instruction, determine a pre-charging time of a capacitive load based on the opening instruction, and send a first voltage signal to the pre-charging circuit within the pre-charging time.

[0007] The pre-charging circuit is configured to charge the capacitive load according to the first voltage signal.

[0008] After the pre-charging time, the circuit controller sends a second voltage signal to the switch circuit.

[0009] The switch circuit is configured to control the vehicle controller to open according to the second voltage signal.

[0010] According to a second aspect of the embodiment of the present application, a switch control method of vehicle controller is provided, comprising:

[0011] determining, by the circuit controller, a pre-charge time of the capacitive load in response to the vehicle controller opening instruction;

[0012] sending, by a sending unit, a first voltage signal to a pre-charge circuit within the pre-charge time;

[0013] charging, by a pre-charge unit, the capacitive load by the pre-charge circuit based on the first voltage signal;

[0014] sending, by the sending unit, a second voltage signal to a switch circuit by the circuit controller after the pre-charge time;

[0015] controlling, by a turning-on unit, the vehicle controller to turn on by the switch circuit according to the second voltage signal.

[0016] According to a third aspect of the embodiments of the present application, a switch circuit control device of a vehicle controller is provided, comprising:

[0017] a determining unit configured to determine, by a circuit controller, a pre-charge time of a capacitive load in response to a vehicle controller opening instruction;

[0018] a sending unit configured to send, within the pre-charge time, a first voltage signal to a pre-charge circuit;

[0019] a pre-charge unit configured to charge, by the pre-charge circuit, the capacitive load based on the first voltage signal;

[0020] the sending unit is further configured to send, by the circuit controller, a second voltage signal to a switch circuit after the pre-charge time;

[0021] a turning-on unit configured to control, by the switch circuit, the vehicle controller to turn on according to the second voltage signal.

[0022] According to a fourth aspect of the embodiments of the present application, a computer readable storage medium is provided, which stores a computer program, and the program is executed by a processor to implement the following steps:

[0023] determining, by the circuit controller, a pre-charge time of the capacitive load in response to the vehicle controller opening instruction;

[0024] sending, within the pre-charge time, a first voltage signal to a pre-charge circuit;

[0025] charging, by the pre-charge circuit, the capacitive load based on the first voltage signal;

[0026] sending, by the circuit controller, a second voltage signal to a switch circuit after the pre-charge time;

[0027] According to the second voltage signal, the switch circuit is controlled to turn on the vehicle controller.

[0028] According to a fifth aspect of the embodiments of the present application, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the following steps when executing the program:

[0029] In response to the vehicle controller turning-on instruction, the circuit controller is used to determine a pre-charge time of the capacitive load;

[0030] During the pre-charge time, a first voltage signal is sent to the pre-charge circuit;

[0031] Based on the first voltage signal, the pre-charge circuit is used to charge the capacitive load;

[0032] After the pre-charge time, the circuit controller is used to send a second voltage signal to the switch circuit;

[0033] According to the second voltage signal, the switch circuit is controlled to turn on the vehicle controller.

[0034] The innovations of the embodiments of the present application include:

[0035] 1. Integrating the pre-charge circuit into the vehicle controller, so that the pre-charge circuit and the controller switch circuit become a whole control circuit, thereby improving the integration of the vehicle controller and reducing the overall power consumption of the device, which is one of the innovations of the embodiments of the present application.

[0036] 2. The pre-charge circuit can work in a wide voltage range of 8-36V, which is one of the innovations of the embodiments of the present application.

[0037] The switch control circuit of the vehicle controller provided by the present application can integrate the pre-charge circuit into the vehicle controller compared with the prior art using an external pre-charge circuit, so that the pre-charge circuit and the controller switch circuit become a whole control circuit, thereby improving the integration of the vehicle controller, making it more convenient to control, and avoiding increasing the overall power consumption of the device.

[0038] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to make the technical solutions of the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only aim to some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the premise of not paying any creative effort.

[0040] Figure 1 A switch control circuit block diagram of a vehicle controller provided by the embodiment of the present application is shown;

[0041] Figure 2 A precharge circuit schematic diagram provided by the embodiment of the present application is shown;

[0042] Figure 3 A switch circuit schematic diagram provided by the embodiment of the present application is shown;

[0043] Figure 4 A switch circuit control method flow chart of a vehicle controller provided by the embodiment of the present application is shown;

[0044] Figure 5 A structure schematic diagram of a switch circuit control device of a vehicle controller provided by the embodiment of the present application is shown. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely below with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present application.

[0046] It should be noted that the terms “include” and “have” and any variations thereof in the embodiments of the present application and the accompanying drawings are intended to cover the inclusions without the exclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed or optionally further includes other steps or units inherent to the process, method, product or device.

[0047] The existing external precharge circuit cannot be built into the vehicle controller, and the integration degree is low. Moreover, when not in use, the relay will standby and consume, thereby increasing the overall power consumption of the device.

[0048] In order to overcome the above defects, the embodiment of the present application provides a switch control circuit of a vehicle controller, as shown in Figure 1As shown, the circuit includes: a circuit controller 1, a pre-charge circuit 2 and a switch circuit 3, the pre-charge circuit 2 is connected with the switch circuit 3 in parallel, the first output port and the second output port of the circuit controller 1 are connected with the pre-charge circuit 2 and the switch circuit 3 respectively; the circuit controller 1 is used for receiving a vehicle controller opening instruction; based on the opening instruction, the pre-charge time of the capacitive load is determined; within the pre-charge time, the first voltage signal is sent to the pre-charge circuit 2; the pre-charge circuit 2 is used for charging the capacitive load according to the first voltage signal; after the pre-charge time, the circuit controller 1 sends the second voltage signal to the switch circuit 3; the switch circuit 3 is used for controlling the vehicle controller to open according to the second voltage signal.

[0049] Wherein, the circuit controller can be a single-chip microcomputer, or other types of controllers, the embodiments of the application do not make specific limitation. In addition, the pre-charge circuit is connected with the capacitive load, and the switch circuit is connected with the vehicle controller.

[0050] Specifically, before formally opening the vehicle controller, the capacitive load needs to be pre-charged, at this time, the circuit controller 1 will set the first output port P10.1 to high potential according to the pre-charge time calculated in real time or the pre-charge time set in advance, that is, output the first voltage signal to the pre-charge circuit 2 within the pre-charge time, the pre-charge circuit 2 will be in the conduction state after receiving the first voltage signal, at this time, the capacitive load starts to be charged. When the capacitive load is fully charged, the first output port P10.1 of the circuit controller 1 is set to low potential, at this time, the pre-charge circuit 2 is in the non-conduction state, and the capacitive load is no longer charged.

[0051] In order to prevent the existence of current fluctuation, the circuit controller 1 can wait for tens of microseconds, and then set the second output port P10.7 to high potential, that is, output the second voltage signal to the switch circuit 3, the switch circuit 3 will be in the conduction state after receiving the second voltage signal, at this time, the vehicle controller is opened.

[0052] Further, the circuit controller 1 is also used for calculating the pre-charge time of the capacitive load according to the supply voltage, and the target voltage and the capacitance corresponding to the capacitive load.

[0053] Wherein, the supply voltage and the target voltage can be set according to the actual business demand. The specific calculation formula of the pre-charge time of the capacitive load is as follows:

[0054] Vt=Vu*[1–exp(-t / RC)]

[0055] Where Vu is the supply voltage (battery voltage), for example, the supply voltage is set to 24V, Vt is the target voltage corresponding to the capacitive load, t is the pre-charge time of the capacitive load, R and C are the resistance and inductance of the capacitive load, for example, the pre-charge time is determined to be 3RC.

[0056] It should be noted that, in this embodiment of the invention, the circuit controller 1 can not only calculate the pre-charge time of the capacitive load in real time according to the above formula, but also calculate the pre-charge time of the capacitive load in advance and configure it in the circuit controller 1.

[0057] Furthermore, such as Figure 2 As shown, the pre-charging circuit 2 includes: a first pre-charging MOSFET Q5 / Q7, a second pre-charging MOSFET Q53, a first voltage divider resistor R329, and a second voltage divider resistor R332; the power input terminal BAT_IN of the vehicle controller 1 is connected to the input terminal of the first voltage divider resistor R329 and the source of the first pre-charging MOSFET Q5 / Q7, respectively; the output terminal of the first voltage divider resistor R329 is connected to the gate of the first pre-charging MOSFET Q5 / Q7 and the input terminal of the second voltage divider resistor R332, respectively; the drain of the first pre-charging MOSFET Q5 / Q7 is connected to the capacitive load; the output terminal of the second voltage divider resistor R332 is connected to the drain of the second pre-charging MOSFET Q53; and the gate and source of the second pre-charging MOSFET Q53 are connected to the first output port P10.1 of the circuit controller 1 and grounded, respectively.

[0058] Specifically, the first pre-charge MOSFET Q5 / Q7 and the second pre-charge MOSFET Q53 can be MOSFETs. R329 provides a bias voltage for the first pre-charge MOSFET Q5 / Q7 so that it can be turned on in a controlled manner. The first voltage divider resistor R329 and the second voltage divider resistor R332 form a voltage divider circuit to ensure that the first pre-charge MOSFET Q5 / Q7 can work normally.

[0059] For the embodiment of the application, the circuit controller 1 can control the second pre-charge field effect tube Q53 to be turned on or turned off by controlling the voltage value between the gate and the source of the second pre-charge field effect tube Q53, and further control the first pre-charge field effect tube Q5 / Q7 to be turned on or turned off. Specifically, when the first output port P10.1 of the circuit controller 1 is set to high potential, the second pre-charge field effect tube Q53 is turned on, at this time, the first voltage dividing resistor R329 and the second voltage dividing resistor R332 are connected in series to the ground, the first voltage dividing resistor R329 between the gate and the drain of the first pre-charge field effect tube Q5 / Q7 will be voltage-divided, so that the first pre-charge field effect tube Q5 / Q7 changes from the off state to the on state, after being turned on, the voltage of BAT_HS is close to the voltage of the power input end BAT_IN of the vehicle controller, at this time, the power input end BAT_IN of the vehicle controller will charge the capacitive load on the BAT_HS side. After a pre-charge time, the capacitive load is fully charged, the first output port P10.1 of the circuit controller 1 is set to low potential, the second pre-charge field effect tube Q53 is turned off, at this time, there is no pressure difference between the gate and the source of the first pre-charge field effect tube Q5 / Q7, the first pre-charge field effect tube Q5 / Q7 is turned off, and the power input end BAT_IN of the vehicle controller no longer charges the capacitive load.

[0060] Further, the pre-charge circuit 2 further comprises a pre-charge current limiting resistor R335 and a pre-charge bias resistor R336; the two ends of the pre-charge current limiting resistor R335 are respectively connected with the first output port P10.1 of the circuit controller 1 and the gate of the second pre-charge field effect tube Q53, and the two ends of the pre-charge bias resistor R336 are respectively connected with the gate of the second pre-charge field effect tube Q53 and the ground.

[0061] Among them, the pre-charge current limiting resistor R335 functions to limit current and adjust the switching rate of the second pre-charge field effect tube Q53. The pre-charge bias resistor R336 functions to provide a bias voltage and provide a discharge circuit for static electricity, so as to protect the second pre-charge field effect tube Q53 from being mis-triggered and static breakdown.

[0062] Further, the pre-charge circuit 2 further comprises a pre-charge current limiting resistor R335 and a pre-charge bias resistor R336; the two ends of the pre-charge current limiting resistor R335 are respectively connected with the first output port P10.1 of the circuit controller 1 and the gate of the second pre-charge field effect tube Q53, and the two ends of the pre-charge bias resistor R336 are respectively connected with the gate of the second pre-charge field effect tube Q53 and the ground.

[0063] Among them, the pre-charge current limiting resistor R335 functions to limit current and adjust the switching rate of the second pre-charge field effect tube Q53. The pre-charge bias resistor R336 functions to provide a bias voltage and provide a discharge circuit for static electricity, so as to protect the second pre-charge field effect tube Q53 from being mis-triggered and static breakdown.

[0064] Further, the pre-charge circuit 2 further comprises a pre-charge current limiting resistor R335 and a pre-charge bias resistor R336; the two ends of the pre-charge current limiting resistor R335 are respectively connected with the first output port P10.1 of the circuit controller 1 and the gate of the second pre-charge field effect tube Q53, and the two ends of the pre-charge bias resistor R336 are respectively connected with the gate of the second pre-charge field effect tube Q53 and the ground.

[0065] Wherein, when encountering a surge voltage, D8 can protect the voltage between the gate and the source of the first pre-charge field effect tube Q5 / Q7 from exceeding the maximum value.

[0066] Further, as shown in Figure 3 The switch circuit 3 includes a first switch field effect tube Q4, a second switch field effect tube Q10, a triode Q6 / Q8, a third voltage dividing resistor R333 and a fourth voltage dividing resistor R337. The input end of the third voltage dividing resistor R333 is connected with the emitter of the triode Q6 / Q8, the output end of the third voltage dividing resistor R333 is connected with the base of the triode Q6 / Q8 and the input end of the fourth voltage dividing resistor R337 respectively, the output end of the fourth voltage dividing resistor R337 is connected with the drain of the second switch field effect tube Q10, the gate and the source of the second switch field effect tube Q10 are connected with the second output port P10.7 of the circuit controller 1 and the ground respectively, the collector of the triode Q6 / Q8 is connected with the gate of the first switch field effect tube Q4, the drain and the source of the first switch field effect tube Q4 are connected with the power input end BAT_IN of the vehicle controller and the vehicle controller respectively.

[0067] Wherein, the first switch field effect tube Q4 and the second switch field effect tube Q10 can be MOS tubes, the second switch field effect tube Q10 controls the conduction loop, the third voltage dividing resistor R333 and the fourth voltage dividing resistor R337 form a voltage dividing circuit to ensure that the triode Q6 / Q8 can work normally, when encountering a surge voltage, D11 can protect the voltage between the gate and the source of the first switch field effect tube Q4 from exceeding the maximum value.

[0068] Specifically, after the pre-charge circuit is turned off, the second output port P10.7 of the circuit controller 1 is set to high level, the second switch field effect transistor Q10 is turned on, and the third voltage dividing resistor R333 and the fourth voltage dividing resistor R337 are connected in series to the ground. Since V_BOOST has a high voltage, which is higher than the supply voltage 11V or 12V, the third voltage dividing resistor R333 can divide the voltage, so that there is a voltage difference between the base and the emitter of the triode Q6 / Q8, the triode Q6 / Q8 is turned on, at this time, the gate of the first switch field effect transistor Q4 has a voltage, the voltage of BAT_HS is equivalent to 0, the first switch field effect transistor Q4 is turned from the off state to the on state, after being turned on, the voltage of BAT_HS is close to the voltage of the power input end BAT_IN of the vehicle controller, at this time, the vehicle controller on the BAT_HS side is powered on. Conversely, when the second output port P10.7 of the circuit controller is set to low level, the second switch field effect transistor Q10 is turned off, there is no voltage difference between the base and the emitter of the triode Q6 / Q8, the triode Q6 / Q8 is turned off, at this time, the gate of the first switch field effect transistor Q4 has no voltage, the first switch field effect transistor Q4 is in the off state, and the vehicle controller is turned off.

[0069] It should be noted that, in order to prevent current fluctuation caused by turning on the first switch field effect transistor Q4 when the first pre-charge field effect transistor Q5 / Q7 is not turned off, the embodiment of the present application can wait for tens of microseconds after the pre-charge circuit 2 is turned off, and then control the first field effect transistor Q4 to be turned on, so that the vehicle controller starts to work normally.

[0070] Further, the switch circuit 3 further comprises a first switch current limiting resistor R339, a first switch bias resistor R341 and a second switch bias resistor R328; the two ends of the first switch current limiting resistor R339 are respectively connected with the second output port P10.7 of the circuit controller 1 and the gate of the second field effect transistor Q10, the two ends of the first switch bias resistor R341 are respectively connected with the gate and the source of the second field effect transistor Q10, and the two ends of the second switch bias resistor R328 are respectively connected with the gate and the source of the first switch field effect transistor Q4.

[0071] Among them, the first switch current limiting resistor R339 functions to limit current, the first switch bias resistor R341 functions to provide a bias voltage to provide a discharge circuit for static electricity, so as to protect the second switch field effect transistor Q10 from being mis-triggered and electrostatic breakdown, and the second switch bias resistor R328 functions to provide a bias voltage to provide a discharge circuit for static electricity, so as to protect the first switch field effect transistor Q4 from being mis-triggered and electrostatic breakdown.

[0072] Further, the switch circuit 3 further comprises a bypass capacitor C364, a pull-down resistor R340 and a first filter capacitor C365; two ends of the pull-down resistor R340 are connected with a second output port P10.7 of the circuit controller and grounded respectively, the bypass capacitor C364 is connected with the pull-down resistor R340 in parallel, and two ends of the first filter capacitor C365 are connected with a gate and a source of the second field effect tube Q10 respectively.

[0073] Wherein, the C364 is a bypass capacitor, the R340 is a pull-down resistor, the R339 is a current limiting resistor, and the C365 is a filter.

[0074] Further, the switch circuit 3 further comprises a second switch current limiting resistor R326, a diode D9, a first clamping diode D13 and a second clamping diode D11; two ends of the second switch current limiting resistor R326 are connected with the diode D9 and an input end of the third voltage dividing resistor R333 respectively, the first clamping diode D13 is connected with the third voltage dividing resistor R333 in parallel, and two ends of the second clamping diode D11 are connected with a gate and a source of the first switch field effect tube Q4 respectively.

[0075] Wherein, the first clamping diode D13 is used for protecting a voltage difference between the two ends of the triode Q6 / Q8 from exceeding a maximum value, the R326 is used for current limiting, the diode D9 is mainly used for guiding conduction, and the second clamping diode D11 is used for protecting a voltage between the two ends of the first switch field effect tube Q4 from exceeding a maximum value.

[0076] Further, the switch circuit 3 further comprises a second filter capacitor C354 connected with the third voltage dividing resistor R333 in parallel.

[0077] The switch control circuit of the vehicle controller provided by the embodiment of the application can integrate the pre-charge circuit into the vehicle controller, so that the pre-charge circuit and the switch circuit of the controller become a whole control circuit, thereby improving the integration of the vehicle controller, making the control more convenient, and avoiding increasing the overall power consumption of the equipment.

[0078] The embodiment of the application provides a switch circuit control method of a vehicle controller, as shown in the method. Figure 4 The method comprises the following steps.

[0079] In step 101, in response to a vehicle controller start instruction, a pre-charge time of a capacitive load is determined by using a circuit controller.

[0080] For the embodiment of the present application, the capacitive load needs to be pre-charged before the vehicle controller is formally started, at this time, the pre-charge time of the capacitive load needs to be determined. Specifically, the pre-charge time of the capacitive load can be calculated according to the supply voltage, and the target voltage and the capacitance corresponding to the capacitive load. The supply voltage and the target voltage can be set according to the actual business needs. The specific calculation formula of the pre-charge time of the capacitive load is as follows:

[0081] Vt=Vu*[1–exp(-t / RC)]

[0082] Wherein, Vu is the supply voltage (battery voltage), for example, the supply voltage is set to 24V, Vt is the target voltage corresponding to the capacitive load, t is the pre-charge time of the capacitive load, and R and C are the resistance and inductance of the capacitive load, respectively, for example, the pre-charge time is determined to be 3RC.

[0083] It should be noted that in the embodiment of the present application, the circuit controller 1 can not only calculate the pre-charge time of the capacitive load in real time according to the above formula, but also can calculate the pre-charge time of the capacitive load in advance and configure it in the circuit controller 1.

[0084] Step 102, sending a first voltage signal to the pre-charge circuit within the pre-charge time.

[0085] For the embodiment of the present application, before the vehicle controller is formally started, the circuit controller 1 will set the first output port P10.1 to high potential according to the real-time calculated pre-charge time or the pre-set pre-charge time, that is, output the first voltage signal to the pre-charge circuit 2 within the pre-charge time.

[0086] Step 103, charging the capacitive load by using the pre-charge circuit based on the first voltage signal.

[0087] For the embodiment of the present application, after receiving the first voltage signal, the pre-charge circuit 2 will be in the conducting state, at this time, the capacitive load starts to be charged. Specifically, when the first output port P10.1 of the circuit controller 1 is set to high potential, the second pre-charge field effect tube Q53 in the pre-charge circuit is turned on, at this time, the first voltage dividing resistor R329 and the second voltage dividing resistor R332 are connected in series to the ground, the first voltage dividing resistor R329 between the gate and the drain of the first pre-charge field effect tube Q5 / Q7 will divide the voltage, so that the first pre-charge field effect tube Q5 / Q7 changes from the cut-off state to the conducting state, after being turned on, the voltage of BAT_HS is close to the voltage of the power input end BAT_IN of the vehicle controller 1, at this time, the power input end BAT_IN of the vehicle controller charges the capacitive load on the BAT_HS side.

[0088] When the capacitive load is fully charged, the first output port P10.1 of the circuit controller 1 is set to low voltage, the second pre-charge field effect transistor Q53 is turned off, at this time, there is no voltage difference between the gate and the source of the first pre-charge field effect transistor Q5 / Q7, the first pre-charge field effect transistor Q5 / Q7 is turned off, and the power input end BAT_IN of the vehicle controller no longer charges the capacitive load.

[0089] In step 104, after the pre-charge time, the circuit controller sends a second voltage signal to the switching circuit.

[0090] For the embodiment of the present application, in order to prevent the existence of current fluctuation, the circuit controller 1 can wait for tens of microseconds and then set the second output port P10.7 to high voltage, that is, output the second voltage signal to the switching circuit 3.

[0091] In step 105, according to the second voltage signal, the switching circuit controls the vehicle controller to be turned on.

[0092] For the embodiment of the present application, after receiving the second voltage signal, the switching circuit 3 is in a conducting state, and at this time, the vehicle controller is turned on. Specifically, after the pre-charge circuit is turned off, the second output port P10.7 of the circuit controller is set to high voltage, the second switch field effect transistor Q10 in the switching circuit is turned on, at this time, the third voltage dividing resistor R333 and the fourth voltage dividing resistor R337 are connected in series to the ground. Since V_BOOST has a high voltage, which is higher than the supply voltage 11V or 12V, the third voltage dividing resistor R333 can divide the voltage, so that there is a voltage difference between the base and the emitter of the transistor Q6 / Q8, the transistor Q6 / Q8 is turned on, at this time, there is a voltage at the gate of the first switch field effect transistor Q4, the voltage of BAT_HS is equivalent to 0, the first switch field effect transistor Q4 changes from the off state to the on state, after being turned on, the voltage of BAT_HS is close to the voltage of the power input end BAT_IN of the vehicle controller, at this time, the vehicle controller on the BAT_HS side is powered on and turned on.

[0093] On the contrary, when the second output port P10.7 of the circuit controller is set to low voltage, the second switch field effect transistor Q10 is turned off, there is no voltage difference between the base and the emitter of the transistor Q6 / Q8, the transistor Q6 / Q8 is turned off, at this time, there is no voltage at the gate of the first switch field effect transistor Q4, the first switch field effect transistor Q4 is in the off state, and the vehicle controller is turned off.

[0094] The switching circuit control method for the vehicle controller provided by the embodiment of the present application can integrate the pre-charge circuit into the vehicle controller, so that the pre-charge circuit and the controller switching circuit as a whole become a control circuit, thereby improving the integration of the vehicle controller and making it more convenient to control, and at the same time, the overall power consumption of the device can be avoided.

[0095] Further, as a specific implementation of Figure 4 , the embodiment of the present application provides a switching circuit control device of a vehicle controller, as shown in Figure 5 , the device comprises a determination unit 31, a sending unit 32, a pre-charging unit 33 and an opening unit 34.

[0096] The determination unit 31 can be used to determine a pre-charging time of a capacitive load by using a circuit controller in response to a vehicle controller opening instruction.

[0097] The sending unit 32 can be used to send a first voltage signal to a pre-charging circuit within the pre-charging time.

[0098] The pre-charging unit 33 can be used to charge the capacitive load by using the pre-charging circuit based on the first voltage signal.

[0099] The sending unit 32 can also be used to send a second voltage signal to a switching circuit by using the circuit controller after the pre-charging time.

[0100] The opening unit 34 can be used to control the vehicle controller to open by using the switching circuit according to the second voltage signal.

[0101] It should be noted that other corresponding descriptions of the functions of the switching circuit control device of the vehicle controller provided by the embodiment of the present application can refer to the corresponding descriptions of the method shown in Figure 4 , which will not be described here.

[0102] Based on the above method shown in Figure 4 , accordingly, the embodiment of the present application also provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to implement the following steps: determining a pre-charging time of a capacitive load by using a circuit controller in response to a vehicle controller opening instruction; sending a first voltage signal to a pre-charging circuit within the pre-charging time; charging the capacitive load by using the pre-charging circuit based on the first voltage signal; sending a second voltage signal to a switching circuit by using the circuit controller after the pre-charging time; and controlling the vehicle controller to open by using the switching circuit according to the second voltage signal.

[0103] Based on the above method shown in Figure 4 and the computer readable storage medium shown in Figure 5The embodiment of the device also provides an entity structure diagram of an electronic device, which comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein the memory and the processor are arranged on a bus, and the processor implements the following steps when executing the program: determining a pre-charge time of a capacitive load by using a circuit controller in response to a vehicle controller opening instruction; sending a first voltage signal to a pre-charge circuit within the pre-charge time; charging the capacitive load by using the pre-charge circuit based on the first voltage signal; sending a second voltage signal to a switch circuit by using the circuit controller after the pre-charge time; and controlling the vehicle controller to open by using the switch circuit according to the second voltage signal.

[0104] The embodiment of the application can integrate the pre-charge circuit into the vehicle controller, so that the pre-charge circuit and the controller switch circuit become a whole control circuit, thereby improving the integration of the vehicle controller and making the control more convenient, and meanwhile avoiding increasing the overall power consumption of the device.

[0105] Those skilled in the art can understand that the drawings are only schematic diagrams of the embodiment, and the modules or flows in the drawings are not necessarily necessary for implementing the application.

[0106] Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description of the embodiment, or can be changed and located in one or more devices different from the embodiment. The modules in the above embodiment can be combined into one module, or can be further split into multiple sub-modules.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application, rather than limit the same; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. A switch control circuit of a vehicle controller, characterized by, The circuit comprises: a circuit controller, a pre-charge circuit and a switch circuit, the pre-charge circuit being connected in parallel with the switch circuit, and a first output port and a second output port of the circuit controller being connected with the pre-charge circuit and the switch circuit respectively; the circuit controller is configured to receive a start-up instruction of a vehicle controller, and determine a pre-charge time of a capacitive load based on the start-up instruction; in the pre-charge time, the circuit controller sends a first voltage signal to the pre-charge circuit; the pre-charge circuit is configured to charge the capacitive load according to the first voltage signal; after the pre-charge time, the circuit controller sends a second voltage signal to the switch circuit; the switch circuit is configured to control the start-up of the vehicle controller according to the second voltage signal; wherein the switch circuit comprises a first switch field effect transistor, a second switch field effect transistor, a triode, a third voltage dividing resistor, a fourth voltage dividing resistor, a first switch current limiting resistor, a first switch bias resistor and a second switch bias resistor; an input end of the third voltage dividing resistor is connected with an emitter of the triode, output ends of the third voltage dividing resistor are connected with a base of the triode and an input end of the fourth voltage dividing resistor respectively, an output end of the fourth voltage dividing resistor is connected with a drain of the second switch field effect transistor, a gate and a source of the second switch field effect transistor are connected with the second output port of the circuit controller and the ground respectively, a collector of the triode is connected with a gate of the first switch field effect transistor, a drain and a source of the first switch field effect transistor are connected with a power input end of the vehicle controller and the vehicle controller respectively, two ends of the first switch current limiting resistor are connected with the second output port of the circuit controller and the gate of the second switch field effect transistor respectively, two ends of the first switch bias resistor are connected with the gate and the source of the second switch field effect transistor respectively, and two ends of the second switch bias resistor are connected with the gate and the source of the first switch field effect transistor respectively.

2. The circuit according to claim 1, wherein the circuit controller is further configured to calculate the pre-charge time of the capacitive load according to a supply voltage, a target voltage and a capacitance corresponding to the capacitive load.

3. The circuit according to any one of claims 1 or 2, characterized in that, the pre-charge circuit comprises a first pre-charge field effect transistor, a second pre-charge field effect transistor, a first voltage dividing resistor and a second voltage dividing resistor; the power input end of the vehicle controller is connected with an input end of the first voltage dividing resistor and a source of the first pre-charge field effect transistor respectively, output ends of the first voltage dividing resistor are connected with a gate of the first pre-charge field effect transistor and an input end of the second voltage dividing resistor respectively, a drain of the first pre-charge field effect transistor is connected with the capacitive load, an output end of the second voltage dividing resistor is connected with a drain of the second pre-charge field effect transistor, a gate and a source of the second pre-charge field effect transistor are connected with the first output port of the circuit controller and the ground respectively.

4. The circuit of claim 3, wherein, the pre-charge circuit further comprises a pre-charge current limiting resistor and a pre-charge bias resistor. The two ends of the pre-charge current-limiting resistor are connected with the first output port of the circuit controller and the gate of the second pre-charge field effect tube, respectively, and the two ends of the pre-charge bias resistor are connected with the gate of the second pre-charge field effect tube and the ground, respectively.

5. A circuit according to claim 3 or 4, characterised in that, The pre-charge circuit further comprises a pre-charge slow current resistor, and the two ends of the pre-charge slow current resistor are connected with the power input end of the vehicle controller and the source of the first pre-charge field effect tube, respectively.

6. A switching circuit control method of a vehicle controller, characterized by, Comprise: In response to a vehicle controller opening instruction, a circuit controller is used to determine a pre-charge time of a capacitive load; In the pre-charge time, a first voltage signal is sent to a pre-charge circuit; Based on the first voltage signal, the pre-charge circuit is used to charge the capacitive load; After the pre-charge time, the circuit controller is used to send a second voltage signal to a switching circuit; According to the second voltage signal, the switching circuit is used to control the vehicle controller to open; Wherein, the switching circuit comprises: a first switch field effect tube, a second switch field effect tube, a triode, a third voltage dividing resistor, a fourth voltage dividing resistor, a first switch current-limiting resistor, a first switch bias resistor and a second switch bias resistor; The input end of the third voltage dividing resistor is connected with the emitter of the triode, the output end of the third voltage dividing resistor is connected with the base of the triode and the input end of the fourth voltage dividing resistor, respectively, the output end of the fourth voltage dividing resistor is connected with the drain of the second switch field effect tube, the gate and the source of the second switch field effect tube are connected with the second output port of the circuit controller and the ground, respectively, the collector of the triode is connected with the gate of the first switch field effect tube, the drain and the source of the first switch field effect tube are connected with the power input end of the vehicle controller and the vehicle controller, respectively, the two ends of the first switch current-limiting resistor are connected with the second output port of the circuit controller and the gate of the second switch field effect tube, respectively, the two ends of the first switch bias resistor are connected with the gate and the source of the second switch field effect tube, respectively, and the two ends of the second switch bias resistor are connected with the gate and the source of the first switch field effect tube, respectively.

7. A switching circuit control device of a vehicle controller, characterized by Comprise: A determination unit is configured to determine, in response to a vehicle controller opening instruction, a pre-charge time of a capacitive load by using a circuit controller; A sending unit is configured to send a first voltage signal to a pre-charge circuit in the pre-charge time; A pre-charge unit is configured to charge the capacitive load by using the pre-charge circuit based on the first voltage signal; The sending unit is further configured to send, after the pre-charge time, a second voltage signal to a switching circuit by using the circuit controller; An opening unit is configured to control the vehicle controller to open by using the switching circuit according to the second voltage signal; The switch circuit comprises a first switch field effect transistor, a second switch field effect transistor, a triode, a third voltage dividing resistor, a fourth voltage dividing resistor, a first switch current limiting resistor, a first switch bias resistor and a second switch bias resistor; an input end of the third voltage dividing resistor is connected with an emitter of the triode, output ends of the third voltage dividing resistor are respectively connected with a base of the triode and an input end of the fourth voltage dividing resistor, an output end of the fourth voltage dividing resistor is connected with a drain of the second switch field effect transistor, a gate of the second switch field effect transistor is connected with a second output port of the circuit controller and a source of the second switch field effect transistor is grounded, a collector of the triode is connected with a gate of the first switch field effect transistor, a drain of the first switch field effect transistor is connected with a power input end of the vehicle controller and a source of the first switch field effect transistor is connected with the vehicle controller, two ends of the first switch current limiting resistor are respectively connected with the second output port of the circuit controller and the gate of the second switch field effect transistor, two ends of the first switch bias resistor are respectively connected with the gate and the source of the second switch field effect transistor, and two ends of the second switch bias resistor are respectively connected with the gate and the source of the first switch field effect transistor.

8. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program, when executed by a processor, implements the steps of the method of claim 6.

9. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The computer program, when executed by a processor, implements the steps of the method of claim 6.

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