A control circuit for low-voltage power supply of an all-in-one controller

Abstract

The present invention discloses a low-voltage power control circuit for an all-in-one controller, comprising a wake-up circuit for outputting a high-level signal after receiving the vehicle's ON-speed power or charging power; a conduction circuit for receiving the high-level signal and performing hierarchical wake-up; and a software control circuit for receiving the high-level signal and controlling the conduction circuit's wake-up time and power-off signal. The present invention uses the high-level signal as the wake-up signal, not as the power source, thereby reducing the current on the low-voltage distribution cables for the ON-speed power and the charging wake-up power. The use of MOS transistors instead of relays effectively improves the lifespan and reliability of the circuit. The use of a primary conduction circuit and a secondary conduction circuit fully utilizes the low-voltage power source, providing power to each component only when it is needed and not when it is not, thereby improving the utilization rate of the low-voltage power source.

Description

Technical Field

[0001] The present invention relates to the technical field of all-in-one controllers, and in particular to a low-voltage control circuit of an all-in-one controller. Background Art

[0002] In new energy vehicles, all-in-one controllers control motor operation and distribute voltage. To function properly, these controllers require low-voltage control power from the vehicle's battery. Only after receiving this power can the controller activate the corresponding low-voltage circuits, achieving motor control and voltage distribution. Once the battery's low-voltage control power reaches the controller, how to effectively and efficiently utilize it is a key consideration during its design.

[0003] Low-voltage power-on refers to the vehicle distributing the low-voltage power of the battery to the multi-in-one controller through an external control switch. Low-voltage power-off refers to the vehicle disconnecting the low-voltage power distributed to the multi-in-one controller through an external control switch. The overall internal functions of a general multi-in-one controller are divided into four parts:

[0004] The motor controller (MCU) controls the operation of the main motor of the new energy vehicle.

[0005] Direct current-alternating current converter (DCAC), which controls the auxiliary motor of new energy vehicles;

[0006] Direct current-direct current converter (DCDC), which charges the vehicle battery and supplies power to other low-voltage components;

[0007] The Power Distribution Unit (PDU) provides power to the power distribution unit on the vehicle.

[0008] There are generally two ways to power up the all-in-one controller of a new energy vehicle at low voltage. The first is to turn the car key to the ON position, which wakes up the all-in-one controller. Turning the car key to the ON position indicates that the vehicle is ready to drive, and at this time, the MCU, DCAC, DCDC, and PDU components all need to be powered and operate. The second is when the car is DC charging, and the DC charging gun sends a charging wake-up signal to the all-in-one motor controller to wake it up. At this time, because the vehicle is in the charging state and cannot drive, the MCU and DCAC components do not need to work and do not need to be powered. Only the DCDC and PDU components need to be powered and operate. Currently, the low-voltage power-up of the all-in-one controller of a new energy vehicle has the following disadvantages:

[0009] 1. The external ON-speed power and charging wake-up signal are directly used as the low-voltage control power supply. The all-in-one controller directly consumes the ON-speed power and charging wake-up power. This will cause the current consumed by the ON-speed power and charging wake-up power to be large, and the matching low-voltage cables and low-voltage protection devices must have high overcurrent capacity.

[0010] 2. Relays are used to control the on and off of low-voltage electricity. A large current will flow through the relay at the moment of closing. When the multi-in-one device works for a long time, the relay has the disadvantages of short life and easy failure due to the existence of large current and repeated on and off.

[0011] 3. No distinction is made between the MCU, DCAC, DCDC and PDU parts, and all four parts are powered. When the new energy vehicle is in the charging state, the MCU and DCAC parts are not working, and low-voltage power is supplied to these two parts, which will consume excess electricity. Summary of the Invention

[0012] The object of the present invention is to provide a low-voltage control circuit for an all-in-one controller.

[0013] To achieve the above objectives, the present invention provides the following technical solutions: a low-voltage control circuit for an all-in-one controller, comprising:

[0014] Wake-up circuit, used to output a high-level signal after obtaining the car's ON power or charging power;

[0015] A conduction circuit for obtaining a high-level signal and performing hierarchical wake-up; and

[0016] A software control circuit for obtaining a high-level signal and controlling the wake-up time of the conduction circuit and the power-off signal;

[0017] The conducting circuit comprises:

[0018] A primary conduction circuit for conducting DCDC and PDU; and

[0019] A secondary conduction circuit is used for conducting between the MCU and the DCAC, wherein the secondary conduction circuit is conducted through the primary conduction circuit.

[0020] Furthermore, the wake-up circuit includes resistors R7, R8, capacitor C4, diode D1, Zener diode D2, and transistor Q3, the cathode of the diode D1 is connected to the cathode of the Zener diode D2, the anode of the Zener diode D2 is connected to the base of the transistor Q3 through the resistor R7, one end of the capacitor C4 and the resistor R8 is connected between the resistor R7 and the transistor Q3, and the other end of the capacitor C4 and the resistor R8 is connected to the emitter of the transistor Q3, and the capacitor C4 and the resistor R8 are connected in parallel.

[0021] Furthermore, the primary conduction circuit includes resistors R14, R15, R17, a capacitor C7, and a MOS transistor Q6. One end of the resistor R15 is connected to the drain of the MOS transistor Q6, and the other end of the resistor R15 is connected to the resistor R14. One end of the resistor R17 is connected to the base of the MOS transistor Q6. One end of the capacitor C7 is connected between the resistor R15 and the MOS transistor Q6, and the other end of the capacitor C7 is connected between the resistor R15 and the resistor R14 through the other end of the resistor R17.

[0022] The secondary conduction circuit includes resistors R16, R18, R19, a capacitor C8, and a MOS transistor Q5. One end of the resistor R16 is connected to the drain of the MOS transistor Q5, and the other end of the resistor R16 is connected to the resistor R19. One end of the resistor R18 is connected to the base of the MOS transistor Q5. One end of the capacitor C8 is connected between the resistor R16 and the MOS transistor Q5, and the other end of the capacitor C8 is connected between the resistor R16 and the resistor R19 through the other end of the resistor R18.

[0023] Furthermore, the software control circuit includes resistors R1, R2, R3, R4, R5, R6, R20, capacitors C1, C2, C3, transistors Q1, Q2, and an optocoupler U1. The resistor R4 is connected to the base of the transistor Q1, and the emitter of the transistor Q1 is connected between the resistor R4 and the transistor Q1 through the resistor R3. The capacitor C1 is connected in parallel with the resistor R3. The collector of the transistor Q1 is connected to pin 2 of the optocoupler U1. The capacitor C2 is connected to the resistor R20 and then to the The first pin of the optocoupler U1 is connected to the first pin of the optocoupler U1, one end of the resistor R1 is connected between the resistor R20 and the optocoupler U1, and the other end of the resistor R1 is connected between the transistor Q1 and the optocoupler U1. The fourth pin of the optocoupler U1 is connected to the resistor R6, and the third pin of the optocoupler U1 is connected to the base of the transistor Q2 through the resistor R2. The emitter of the transistor Q2 is connected between the resistor R2 and the transistor Q2 through the resistor R5. The capacitor C3 is connected in parallel with the resistor R5, and the collector of the transistor Q2 is connected to the resistor R14.

[0024] Furthermore, it also includes a secondary wake-up lock circuit that controls the wake-up state of the conduction circuit after obtaining the power-off signal.

[0025] Furthermore, the secondary wake-up lock circuit includes resistors R9, R10, R11, R12, R13, capacitors C5, C6, transistors Q4, Q7, and a Zener diode D3. One end of the resistor R10 is connected to the resistor R11 and then connected to the collector of the transistor Q7. The emitter of the transistor Q7 is connected to one end of R13 through the capacitor C6, and the other end of R13 is connected to the collector of the transistor Q4. The resistor R12 is connected in parallel with the capacitor C6, and the emitter of the transistor Q4 is connected to the other end of the resistor R10. The capacitor C5 is connected in parallel with the resistor R10 and then connected to the base of the transistor Q4. The positive pole of the Zener diode is connected to the resistor R9 and then connected between the resistor R10 and the resistor R11.

[0026] It can be seen from the above technical solution that the present invention has the following beneficial effects:

[0027] 1. Using the high-level signal as a wake-up signal instead of a power source can reduce the current on the low-voltage distribution cables for the ON position and the charging wake-up position, reduce the wire diameter, and reduce the overcurrent requirements for low-voltage protection devices, thereby reducing costs.

[0028] 2. Use MOS tubes to replace relays to control the on and off of low-voltage electricity. The number of switching times of MOS tubes is much higher than that of relays, and the current carrying capacity of MOS tubes is also higher than that of relays. Using MOS tubes for low-voltage on-off control can effectively improve the life and reliability of the circuit;

[0029] 3. A primary conduction circuit and a secondary conduction circuit are used. The primary conduction circuit wakes up the DCDC and PDU parts, and the secondary conduction circuit wakes up the MCU and DCAC parts. When the ON power comes in, both the primary and secondary levels are awakened, and the four parts of MCU, DCAC, DCDC and PDU are all powered. When the charging wake-up power comes in, only the primary DCDC and PDU are awakened, and the MCU and DCAC do not work and do not need to be powered. The primary and secondary conduction circuits make full use of the low-voltage power supply. Each part is powered only when it needs to work, and is not powered when it does not need to work, thereby improving the utilization rate of the low-voltage power supply.

[0030] 4. The software control circuit is used to realize software control to control the power on and off time of the low voltage power of the all-in-one controller, realizing the intelligent application of the all-in-one controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the overall circuit diagram of the present invention;

[0032] Figure 2 This is the wake-up circuit diagram of the present invention;

[0033] Figure 3 This is the software control circuit diagram of the present invention;

[0034] Figure 4 This is a conducting circuit diagram of the present invention;

[0035] Figure 5 This is a secondary wake-up lock circuit diagram of the present invention. DETAILED DESCRIPTION

[0036] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] See also Figure 1 The present invention provides a low-voltage control circuit for an all-in-one controller, including a wake-up circuit, a conduction circuit, a software control circuit and a secondary wake-up lock circuit. Figure 2As shown, the wake-up circuit includes resistors R7, R8, capacitor C4, diode D1, Zener diode D2, and transistor Q3. The cathode of the diode D1 is connected to the cathode of the Zener diode D2, and the anode of the Zener diode D2 is connected to the base of the transistor Q3 through the resistor R7. One end of the capacitor C4 and the resistor R8 is connected between the resistor R7 and the transistor Q3, and the other end of the capacitor C4 and the resistor R8 is connected to the emitter of the transistor Q3. The capacitor C4 and the resistor R8 are connected in parallel.

[0040] Resistors R7 and R8 act as voltage dividers, capacitor C4 acts as a filter, D1 acts as an anti-reverse polarity resistor, D2 is a voltage regulator, which acts to reduce the voltage. Q3 is an NPN transistor. When the base voltage is high, Q3 is turned on.

[0041] +24V_ON is the ON position power provided by the vehicle to the multi-in-one controller. When the key on the vehicle is turned to the ON position, +24V_ON is a high level 24V. After the voltage of D2 is reduced, the voltage divider value of R7 and R8 is greater than 0.7V, and the transistor Q3 is turned on. Figure 2 When the driving end of Q6 is pulled to a low level, Q6 is turned on, and the +24V voltage passes through Q6 to reach +24V_DC_ON, waking up the first-level DCDC and PDU parts; similarly, when the vehicle is DC charging, QC_CTL is a high level of 24V. Through the action of D1, the Q3 transistor is also turned on, that is, Q6 can also be turned on, and the first-level DCDC and PDU parts can also be woken up at this time, that is, +24V_ON and QC_CTL are in a logical OR relationship with each other. If either one becomes a high level, the first-level DCDC and PDU parts can be woken up.

[0042] like Figure 3 As shown, the software control circuit includes resistors R1, R2, R3, R4, R5, R6, R20, capacitors C1, C2, C3, transistors Q1, Q2, and an optocoupler U1. The resistor R4 is connected to the base of the transistor Q1, and the emitter of the transistor Q1 is connected between the resistor R4 and the transistor Q1 through the resistor R3. The capacitor C1 is connected in parallel with the resistor R3. The collector of the transistor Q1 is connected to the 2nd pin of the optocoupler U1. The capacitor C2 is connected to the resistor R20 and then connected to the optocoupler U1. Pin 1 of the optocoupler U1, one end of the resistor R1 is connected between the resistor R20 and the optocoupler U1, and the other end of the resistor R1 is connected between the transistor Q1 and the optocoupler U1, pin 4 of the optocoupler U1 is connected to the resistor R6, and pin 3 of the optocoupler U1 is connected to the base of the transistor Q2 through the resistor R2, and the emitter of the transistor Q2 is connected between the resistor R2 and the transistor Q2 through the resistor R5, the capacitor C3 is connected in parallel with the resistor R5, and the collector of the transistor Q2 is connected to the resistor R14;

[0043] Resistors R2, R3, R4, and R5 act as voltage dividers, and R1, R6, and R20 act as current limiters, limiting the current flowing through the circuit and protecting the device.

[0044] The working principle of this software control circuit is as follows: the DSP_IO_CLT signal is controlled by the software. When it is detected that the +24V_ON or QC_CTL in the wake-up circuit is at a high level of 24V, the software sets the DSP_IO_CLT signal to a high level. After the voltage is divided by R3 and R4, the Q1 transistor is turned on, and the current flows from +3.3V through the primary side of the optocoupler U1 to GND, then the primary side of the optocoupler U1 is turned on. After the primary side of U1 is turned on, the secondary side of U1 is also turned on through the action of the light-emitting diode, then +24V drives the transistor Q2 to turn on through the action of R6, R2 and R5. After Q2 is turned on, the driving end of Q6 is pulled to a low level, then Q6 is turned on, and the +24V voltage reaches +24V_DC_ON through Q6, waking up the first-level DCDC and PDU parts.

[0045] At this time, due to the conduction effect of Q2, Q6 can still remain on even if the hardware wake-up signals +24V_ON and QC_CTL are removed. The duration of Q6 remaining on can be flexibly set through the software control circuit. The software control circuit can adapt to the needs of different vehicle logic according to actual conditions. After this solution is finalized, it can be adapted to the needs of different vehicle models by changing the software configuration. After the hardware signal is removed, the power-off time can be completely controlled by software. The software can also determine whether to delay power-off based on the status of the high-voltage relay as needed. Therefore, the existence of the software control circuit realizes the diversification and intelligence of the power-on and power-off of the all-in-one controller.

[0046] like Figure 4 As shown, the conduction circuit includes a primary conduction circuit and a secondary conduction circuit, wherein the primary conduction circuit includes resistors R14, R15, R17, a capacitor C7, and a MOS transistor Q6. One end of the resistor R15 is connected to the drain of the MOS transistor Q6, and the other end of the resistor R15 is connected to the resistor R14. One end of the resistor R17 is connected to the base of the MOS transistor Q6. One end of the capacitor C7 is connected between the resistor R15 and the MOS transistor Q6, and the other end of the capacitor C7 is connected between the resistor R15 and the resistor R14 through the other end of the resistor R17.

[0047] The secondary conduction circuit includes resistors R16, R18, R19, a capacitor C8, and a MOS transistor Q5. One end of the resistor R16 is connected to the drain of the MOS transistor Q5, and the other end of the resistor R16 is connected to the resistor R19. One end of the resistor R18 is connected to the base of the MOS transistor Q5. One end of the capacitor C8 is connected between the resistor R16 and the MOS transistor Q5, and the other end of the capacitor C8 is connected between the resistor R16 and the resistor R19 through the other end of the resistor R18.

[0048] Q5 and Q6 are two MOS tubes in the 24V main circuit, which control the on and off of the 24V voltage. The four resistors R14, R15, R16, and R19 act as a resistor voltage divider. When the voltage divided by R14 is less than 24V, the MOS tube Q6 is turned on; when the voltage divided by R19 is less than 24V, the MOS tube Q5 is turned on. R17 and R18 are similar and act as current limiters to limit the current flowing through the MOS tube. C7 and C8 act as filters, which can effectively filter out interference at the driving end of the MOS tube and prevent the MOS tube from being mis-turned on during operation.

[0049] +24V is the low-voltage power supply provided by the vehicle to the all-in-one controller. This current flows through some of the low-voltage circuitry. The two MOSFETs are controlled by both software and hardware. The software is controlled by the all-in-one controller's microcontroller and software control circuitry, while the hardware is controlled by an external ON-position power supply and a high-level signal from the charging power supply. MOSFET Q6 is the main switch for the first-stage wakeup. When Q6 is turned on, the +24V voltage passes through Q6 to +24V_DC_ON, energizing the DC-DC and PDU components, enabling DC charging of the all-in-one controller. MOSFET Q5 is the main switch for the second-stage wakeup. Only when the first-stage wakeup is turned on first can the second-stage wakeup be activated. When Q5 is turned on, the +24V voltage passes through Q5 to +24V_AC_ON, energizing the MCU and DC-AC components, enabling the all-in-one controller to control the operation of the main and auxiliary motors.

[0050] By turning on and off the two MOS transistors Q5 and Q6 in the 24V low-voltage power supply main circuit, the first-level and second-level wake-up functions of the all-in-one controller's low-voltage circuit can be achieved, improving the efficiency of the 24V low-voltage power supply and reducing the power consumption of the entire vehicle. MOS transistors Q5 and Q6 have a high switching frequency and strong ability to pass instantaneous current. MOS transistors are used to replace relays to control the on and off of low-voltage power. MOS transistors have a much higher switching frequency and current-carrying capacity than relays. Using MOS transistors for low-voltage on-off control can effectively improve the lifespan and reliability of the circuit.

[0051] like Figure 5As shown, the secondary wake-up lock circuit includes resistors R9, R10, R11, R12, R13, capacitors C5, C6, transistors Q4, Q7, and a Zener diode D3. One end of the resistor R10 is connected to the resistor R11 and then connected to the collector of the transistor Q7. The emitter of the transistor Q7 is connected to one end of R13 through the capacitor C6, and the other end of R13 is connected to the collector of the transistor Q4. The resistor R12 is connected in parallel with the capacitor C6, and the emitter of the transistor Q4 is connected to the other end of the resistor R10. The capacitor C5 is connected in parallel with the resistor R10 and then connected to the base of the transistor Q4. The positive pole of the Zener diode is connected to the resistor R9 and then connected between the resistor R10 and the resistor R11.

[0052] Resistors R9, R10, R11, R12, and R13 all act as voltage dividers. Q4 is an NPN transistor, and Q7 is a PNP transistor, both acting as switches. D3 acts as a voltage reducer, reducing the external +24V_ON voltage before transmitting it to Q4.

[0053] The working principle of this circuit is as follows: when the vehicle key is turned to the ON position, the external +24V_ON signal becomes a high level 24V. After the voltage is reduced by D3, the voltage divider value of R9 and R10 is greater than 0.7V, then the Q4 transistor is turned on, pulling the +24V_AC_CTL to a low level. Then, through the voltage divider effect of R16 and R19 in the conduction circuit, the driving end of Q5 is pulled to a low level, and the MOS tube Q5 is turned on. From the principle of the wake-up circuit 4, we can know that at this time Q6 is turned on, +24V power has reached +24V_DC_ON, and the conduction of Q5 allows +24V power to reach +24V_AC_ON, waking up the secondary MCU and DCAC parts. That is, this circuit also plays the role of secondary wake-up. At the same time, +24V_DC_ON is divided by R12 and R13, causing the driving end of Q7 to become low. The PNP transistor Q7 is turned on, and the +24V_DC_ON voltage enters the lower end of Q7. After the voltage divider of R10 and R11, the driving end of the NPN transistor Q4 is clamped at a high level, and Q4 remains on. Even if the +24V_ON high-level signal is eliminated and Q4 cannot be driven by D3, this circuit can still turn on Q4 through Q7, that is, +24V_AC_CTL remains low, forming a locked effect of this circuit. The special feature of this hardware locking circuit is that it only needs to send a high level from +24V_ON once to keep the MOS tube Q5 turned on. To unlock this circuit and restore Q4 to the off state, the +24V_DC_ON power must be cut off. From the software control circuit, it can be seen that whether the +24V_DC_ON power is cut off or not is controlled by the DSP_IO_CLT signal sent by the software. The whole circuit thus forms a closed loop. The operation of the 24V low-voltage power supply main circuit only needs to be triggered once by the hardware signal +24V_ON. After that, it is completely controlled by the software, thus realizing the software controllability and intelligence of the entire circuit.

[0054] The present invention obtains the car's ON gear power or charging power supply through the wake-up circuit and outputs a high-level signal. The high-level signal is only used as a wake-up signal and not as a power supply. In this way, the current on the two low-voltage distribution cables of the ON gear power and the charging wake-up power can be reduced, the wire diameter is reduced, and the overcurrent requirements for low-voltage protection devices are reduced, thereby reducing costs; the conduction circuit obtains the high-level signal and realizes hierarchical wake-up, with the DCDC and PDU parts as the first-level wake-up and the MCU and DCAC parts as the second-level wake-up. When the ON gear power comes in, both the first and second levels are awakened, and the MCU and DCAC All four parts, C, DCDC, and PDU, require power. When the charging wake-up power comes in, only the first-level DCDC and PDU are awakened. The MCU and DCAC do not work and do not need power. Through the first-level and second-level wake-up methods, the low-voltage power supply can be fully utilized. Each part is powered only when it needs to work, and not powered when it does not need to work, thereby improving the utilization rate of the low-voltage power supply. The software control circuit obtains the high-level signal and controls the wake-up time of the conduction circuit and the power-off signal. Through software control, the low-voltage power on and off time of the multi-in-one controller is controlled, realizing the intelligent application of the multi-in-one controller.

[0055] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A low voltage control circuit for an all-in-one controller, characterized in that: include: Wake-up circuit, used to output a high-level signal after obtaining the car's ON power or charging power; The conduction circuit is used to obtain high-level signals and perform hierarchical wake-up; as well as A software control circuit for obtaining a high-level signal and controlling the wake-up time of the conduction circuit and the power-off signal; The conducting circuit comprises: Used to conduct the primary conduction circuit of DCDC and PDU; as well as A secondary conduction circuit for conducting between the MCU and the DCAC, wherein the secondary conduction circuit is conducted through the primary conduction circuit; The wake-up circuit includes resistors R7, R8, capacitor C4, diode D1, voltage-stabilizing diode D2, and transistor Q3. The cathode of the diode D1 is connected to the cathode of the voltage-stabilizing diode D2, and the anode of the voltage-stabilizing diode D2 is connected to the base of the transistor Q3 through the resistor R7. One end of the capacitor C4 and the resistor R8 is connected between the resistor R7 and the transistor Q3, and the other end of the capacitor C4 and the resistor R8 is connected to the emitter of the transistor Q3. The capacitor C4 and the resistor R8 are connected in parallel. The primary conduction circuit includes resistors R14, R15, R17, capacitor C7, and MOS transistor Q6. One end of the resistor R15 is connected to the drain of the MOS transistor Q6, and the other end of the resistor R15 is connected to the resistor R14. One end of the resistor R17 is connected to the base of the MOS transistor Q6. One end of the capacitor C7 is connected between the resistor R15 and the MOS transistor Q6, and the other end of the capacitor C7 is connected between the resistor R15 and the resistor R14 through the other end of the resistor R17. The secondary conduction circuit includes resistors R16, R18, R19, a capacitor C8, and a MOS transistor Q5. One end of the resistor R16 is connected to the drain of the MOS transistor Q5, and the other end of the resistor R16 is connected to the resistor R19. One end of the resistor R18 is connected to the base of the MOS transistor Q5. One end of the capacitor C8 is connected between the resistor R16 and the MOS transistor Q5, and the other end of the capacitor C8 is connected between the resistor R16 and the resistor R19 through the other end of the resistor R18. The software control circuit includes resistors R1, R2, R3, R4, R5, R6, R20, capacitors C1, C2, C3, transistors Q1, Q2, and an optocoupler U1. The resistor R4 is connected to the base of the transistor Q1, and the emitter of the transistor Q1 is connected between the resistor R4 and the transistor Q1 through the resistor R3. The capacitor C1 is connected in parallel with the resistor R3. The collector of the transistor Q1 is connected to the 2nd pin of the optocoupler U1. The capacitor C2 is connected to the resistor R20 and then connected to the base of the transistor Q1. Pin 1 of the optocoupler U1, one end of the resistor R1 is connected between the resistor R20 and the optocoupler U1, and the other end of the resistor R1 is connected between the transistor Q1 and the optocoupler U1, pin 4 of the optocoupler U1 is connected to the resistor R6, and pin 3 of the optocoupler U1 is connected to the base of the transistor Q2 through the resistor R2, the emitter of the transistor Q2 is connected between the resistor R2 and the transistor Q2 through the resistor R5, the capacitor C3 is connected in parallel with the resistor R5, and the collector of the transistor Q2 is connected to the resistor R14.

2. The all-in-one controller low-voltage control circuit according to claim 1, characterized in that: It also includes a secondary wake-up lock circuit that controls the wake-up state of the conduction circuit after obtaining the power-off signal.

3. The all-in-one controller low-voltage control circuit according to claim 2, characterized in that: The secondary wake-up lock circuit includes resistors R9, R10, R11, R12, R13, capacitors C5, C6, transistors Q4, Q7, and a Zener diode D3. One end of the resistor R10 is connected to the resistor R11 and then connected to the collector of the transistor Q7. The emitter of the transistor Q7 is connected to one end of R13 through the capacitor C6, and the other end of R13 is connected to the collector of the transistor Q4. The resistor R12 is connected in parallel with the capacitor C6, and the emitter of the transistor Q4 is connected to the other end of the resistor R10. The capacitor C5 is connected in parallel with the resistor R10 and then connected to the base of the transistor Q4. The positive pole of the Zener diode is connected to the resistor R9 and then connected between the resistor R10 and the resistor R11.

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