阅读说明：本技术 车辆供电电路，系统及车辆 (Vehicle power supply circuit, system and vehicle ) 是由 韩冰 李穹 钟路平 于 2020-05-29 设计创作，主要内容包括：本公开涉及一种车辆供电电路,系统及车辆,该车辆供电电路通过控制组件在接收到整车下电信号的情况下计时,在记录的时长小于或者等于预设时长的情况下,控制所述用电组件处于供电状态；在记录的时长大于预设时长的情况下,控制所述用电组件断电,这样,能够在接收到整车下电信号之后,实现延时断电,能够为用电组件的软断电提供时间,能够避免瞬时断电对用电组件造成的损害,从而能够提高车辆供电系统的可靠性。(The utility model relates to a vehicle power supply circuit, system and vehicle, this vehicle power supply circuit through the control assembly under the condition of receiving under-the-vehicle electric signal timing, under the condition that the duration of record is less than or equal to the duration of presetting, control the power consumption subassembly to be in the power supply state; when the recorded duration is greater than the preset duration, the power utilization assembly is controlled to be powered off, so that delayed power-off can be realized after the electric signal under the whole vehicle is received, time can be provided for soft power-off of the power utilization assembly, damage to the power utilization assembly caused by instantaneous power-off can be avoided, and reliability of a vehicle power supply system can be improved.)

1. A vehicle power supply circuit, comprising: the control assembly is connected with the electricity utilization assembly;

the control assembly is used for timing under the condition that an electric signal under the whole vehicle is received, and controlling the power utilization assembly to be in a power supply state under the condition that the recorded duration is less than or equal to the preset duration; and controlling the power-off of the power utilization assembly under the condition that the recorded duration is greater than the preset duration.

2. The circuit of claim 1, wherein the control component comprises a control module and a delay component, the delay component coupled between the control module and the powered component;

the control module is used for triggering the time delay assembly to time under the condition of receiving an electric signal under the whole vehicle;

the time delay assembly is used for timing, controlling the power utilization assembly to be in a power supply state under the condition that the recorded time length is less than or equal to the preset time length, and controlling the power utilization assembly to be powered off under the condition that the recorded time length is greater than the preset time length.

3. The circuit of claim 2, wherein the vehicle supply circuit further comprises a first relay connected between the control module and the time delay assembly,

the control module is used for controlling the first relay to be switched off under the condition of receiving the electric signal under the whole vehicle;

and the first relay is used for generating a timing trigger signal after being switched off so as to trigger the time delay component to start timing.

4. The circuit of claim 3, wherein the delay assembly comprises a clock signal generator and a timer, wherein a control terminal of the clock signal generator is connected with the first relay, and an output terminal of the clock signal generator is connected with the timer;

the clock signal generator is used for outputting a clock signal to the timer to trigger the timer to time under the condition of receiving the timing trigger signal;

the timer is used for outputting a power supply maintaining signal to the power utilization assembly under the condition that the recorded duration is less than or equal to the preset duration so as to control the power utilization assembly to be in a power supply state; and the power-off control circuit is also used for outputting a power-off control signal to the power utilization assembly to control the power-off of the power utilization assembly under the condition that the recorded duration is greater than the preset duration.

5. The circuit of claim 4, wherein the time delay assembly further comprises a switching circuit for maintaining a connection between the powered assembly and a normally powered module of a vehicle upon receiving the power supply maintenance signal; and the power utilization assembly is also used for disconnecting the electric utilization assembly from a normal electric module of the vehicle under the condition of receiving the power failure control signal.

6. The circuit of claim 5, wherein the switching circuit comprises a first backward diode, a triode and a second relay, the output terminal of the timer is connected to the base terminal of the triode through the first backward diode, the emitter terminal of the triode is grounded, the collector terminal of the triode is connected to the normally-powered module through the control coil of the second relay, and the control switch of the second relay is connected to the normally-powered module at one end and to the power-consuming component at the other end.

7. The circuit of claim 6, wherein the timer is configured to output the power supply maintaining signal to the triode when the recorded duration is less than or equal to the preset duration;

the triode is used for being conducted after the power supply maintaining signal is received, and the second relay is closed under the condition that the triode is conducted, so that the power utilization assembly is in a power supply state;

the timer is also used for outputting the power-off control signal to the triode under the condition that the recorded duration is longer than the preset duration,

the triode is also used for being cut off after receiving the power-off control signal, and the second relay is disconnected under the condition that the triode is cut off, so that the power utilization assembly is powered off.

8. The circuit of claim 6 or 7, wherein the delay component further comprises a second backward diode, an input terminal of the second backward diode is connected with an output terminal of the first backward diode, and an output terminal of the second backward diode is connected with the timer;

and the second backward diode is used for controlling the timer to stop timing when the recorded duration is longer than the preset duration.

9. A vehicle power supply system characterized by comprising the vehicle power supply circuit according to any one of claims 1 to 8.

10. A vehicle characterized by comprising the vehicle power supply system of the above claim 9.

Technical Field

The present disclosure relates to the field of vehicle technologies, and in particular, to a vehicle power supply circuit, system, and vehicle.

Background

At present, in a low-voltage power supply system of a vehicle, an unloading relay IG is generally used₃/IG₄Power is supplied to low-voltage Power-consuming components such as a VCU (Vehicle Control Unit), an ECU (Electronic Control Unit), and a PCU (Power Control Unit), and when a Vehicle Power switch of a Vehicle is turned OFF from ON, an unloading relay IG is provided₃/IG₄Is disconnected to make the load-off relay IG₃/IG₄Connected low-voltage power utilization assemblyIn power failure, when the power switch of the whole vehicle is turned ON from OFF, the unloading relay IG₃/IG₄Closed to make contact with the unloading relay IG₃/IG₄And powering down and powering up the connected low-voltage power utilization components.

However, when the power switch of the whole vehicle is turned OFF from ON, the unloading relay IG₃/IG₄When the low-voltage power utilization assembly is disconnected, the low-voltage power utilization assembly may still be in a loaded state, and a large number of inductive loads (such as a motor, a pump, an electromagnetic valve and the like) exist in the low-voltage power utilization assembly, so that the current change of the inductive loads is large due to instantaneous power failure, transient voltage impact can occur in a low-voltage power supply system due to the electromagnetic induction phenomenon, and the low-voltage power utilization assembly is easily damaged.

Disclosure of Invention

The purpose of this disclosure is to provide a vehicle supply circuit, system and vehicle.

In order to achieve the above object, a first aspect of the present disclosure provides a vehicle power supply circuit including: the control assembly is connected with the electricity utilization assembly;

the control assembly is used for timing under the condition that an electric signal under the whole vehicle is received, and controlling the power utilization assembly to be in a power supply state under the condition that the recorded duration is less than or equal to the preset duration; and controlling the power-off of the power utilization assembly under the condition that the recorded duration is greater than the preset duration.

Optionally, the control assembly comprises a control module and a time delay assembly, and the time delay assembly is connected between the control module and the power utilization assembly;

the control module is used for triggering the time delay assembly to time under the condition of receiving an electric signal under the whole vehicle;

the time delay assembly is used for timing, controlling the power utilization assembly to be in a power supply state under the condition that the recorded time length is less than or equal to the preset time length, and controlling the power utilization assembly to be powered off under the condition that the recorded time length is greater than the preset time length.

Optionally, the vehicle power supply circuit further comprises a first relay connected between the control module and the time delay assembly,

the control module is used for controlling the first relay to be switched off under the condition of receiving the electric signal under the whole vehicle;

and the first relay is used for generating a timing trigger signal after being switched off so as to trigger the time delay component to start timing.

Optionally, the delay component includes a clock signal generator and a timer, a control end of the clock signal generator is connected to the first relay, and an output end of the clock signal generator is connected to the timer;

the clock signal generator is used for outputting a clock signal to the timer to trigger the timer to time under the condition of receiving the timing trigger signal;

the timer is used for outputting a power supply maintaining signal to the power utilization assembly under the condition that the recorded duration is less than or equal to the preset duration so as to control the power utilization assembly to be in a power supply state; and the power-off control circuit is also used for outputting a power-off control signal to the power utilization assembly to control the power-off of the power utilization assembly under the condition that the recorded duration is greater than the preset duration.

Optionally, the time delay assembly further comprises a switch circuit for maintaining a connection between the electricity consuming assembly and a normal electricity module of a vehicle in case of receiving the power supply maintaining signal; and the power utilization assembly is also used for disconnecting the electric utilization assembly from a normal electric module of the vehicle under the condition of receiving the power failure control signal.

Optionally, the switch circuit includes a first backward diode, a triode and a second relay, the output end of the timer is connected to the base of the triode through the first backward diode, the emitter of the triode is grounded, the collector of the triode is connected to the normal electric module through the control coil of the second relay, one end of the control switch of the second relay is connected to the normal electric module, and the other end of the control switch of the second relay is connected to the electricity utilization assembly.

Optionally, the timer is configured to output the power supply maintaining signal to the triode when the recorded duration is less than or equal to the preset duration;

the triode is used for being conducted after the power supply maintaining signal is received, and the second relay is closed under the condition that the triode is conducted, so that the power utilization assembly is in a power supply state;

the timer is also used for outputting the power-off control signal to the triode under the condition that the recorded duration is longer than the preset duration,

the triode is also used for being cut off after receiving the power-off control signal, and the second relay is disconnected under the condition that the triode is cut off, so that the power utilization assembly is powered off.

Optionally, the delay assembly further includes a second backward diode, an input end of the second backward diode is connected to an output end of the first backward diode, and an output end of the second backward diode is connected to the timer;

and the second backward diode is used for controlling the timer to stop timing when the recorded duration is longer than the preset duration.

In a second aspect of the present disclosure, there is provided a vehicle power supply system including the vehicle power supply circuit described above in the first aspect.

In a third aspect of the present disclosure, there is provided a vehicle including the vehicle power supply system described in the second aspect above.

According to the technical scheme, the control assembly is used for timing under the condition that an electric signal under the whole vehicle is received, and the power utilization assembly is controlled to be in a power supply state under the condition that the recorded duration is less than or equal to the preset duration; when the recorded duration is greater than the preset duration, the power utilization assembly is controlled to be powered off, so that delayed power-off can be realized after the electric signal under the whole vehicle is received, time can be provided for soft power-off of the power utilization assembly, damage to the power utilization assembly caused by instantaneous power-off can be avoided, and reliability of a vehicle power supply system can be improved.

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

Drawings

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

FIG. 1 is a block diagram of a vehicle supply circuit shown in an exemplary embodiment of the present disclosure;

FIG. 2 is a circuit diagram of a vehicle power supply circuit shown in the embodiment of FIG. 1 according to the present disclosure.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

Before describing the embodiments of the present disclosure in detail, the following description is first made on an application scenario of the present disclosure, and the present disclosure may be applied to a power supply system of a vehicle, where the vehicle may be a pure electric vehicle, a fuel-powered vehicle, or a hybrid vehicle, and is described here by taking a pure electric vehicle as an example₃/IG₄(unloading Relay IG)₃Or unloading relay IG₄) Is connected with a low-voltage power supply, and when a power switch of the whole vehicle is turned ON from OFF, the unloading relay IG₃/IG₄When the low-voltage power utilization assembly is closed, the low-voltage power utilization assembly is connected with a low-voltage power supply, the low-voltage power utilization assembly is in a power supply state, and when a power switch of the whole vehicle is turned from ON to OFF, the unloading relay IG is used for unloading the power supply of the whole vehicle₃/IG₄And when the low-voltage power utilization assembly is disconnected with the low-voltage power supply, the low-voltage power utilization assembly is in a power supply state and is powered off. Considering the existence of a large number of inductances in low-voltage power componentsThe load (such as an electric motor, a pump, an electromagnetic valve and the like) is unloaded by the relay IG when the power switch of the whole vehicle is turned OFF from ON₃/IG₄When the low-voltage power utilization assembly is disconnected, the low-voltage power utilization assembly may still be in a loaded state until the current change of an inductive load is large due to instantaneous power failure, transient voltage impact can occur in a low-voltage power supply system due to the electromagnetic induction phenomenon, so that the low-voltage power utilization assembly is easily damaged, and under the condition that the low-voltage power utilization assembly is in a fault reporting state, if the low-voltage power utilization assembly is directly instantaneously powered off, fault data reporting is easily abnormal, and fault information is lost. That is to say, the low-voltage power supply system in the current vehicle is due to the instantaneous outage, so the low-voltage power utilization component is easily damaged, the data reporting is abnormal, and the vehicle reliability is low.

In order to solve the technical problems, the present disclosure provides a vehicle power supply circuit, a system and a vehicle, wherein the vehicle power supply circuit counts time when receiving an electrical signal under the whole vehicle through a control assembly, and controls an electricity utilization assembly to be in a power supply state when a recorded duration is less than or equal to a preset duration; when the recorded duration is greater than the preset duration, the power utilization assembly is controlled to be powered off, so that delayed power-off can be realized after the electric signal under the whole vehicle is received, time can be provided for soft power-off of the power utilization assembly, damage to the power utilization assembly caused by instantaneous power-off can be avoided, and reliability of a vehicle power supply system can be improved.

FIG. 1 is a block diagram of a vehicle supply circuit shown in an exemplary embodiment of the present disclosure; referring to fig. 1, the vehicle power supply circuit includes: a control component 101 and an electricity utilization component 102, wherein the control component 101 is connected with the electricity utilization component 102;

the control component 101 is used for timing under the condition that an electric signal under the whole vehicle is received, and controlling the electric component 102 to be in a power supply state under the condition that the recorded duration is less than or equal to the preset duration; and controlling the power utilization assembly 102 to be powered off under the condition that the recorded duration is greater than the preset duration.

The control component 101 may include a control module 1011 and a delay component 1012, and the delay component 1012 is connected between the control module 1011 and the electric component 102; the control module 1011 is used for triggering the time delay assembly to time under the condition of receiving an electric signal under the whole vehicle; the delay component 1012 is configured to time, control the electrical component 102 to be in a power supply state when the recorded duration is less than or equal to the preset duration, and control the electrical component 102 to be powered off when the recorded duration is greater than the preset duration.

The Control Module 101 may include a BCM (Body Control Module) in a vehicle, and the power utilization Module 102 may include Control devices such as a VCU, an ECU, and a PCU of the vehicle, or may include actuators such as a pump, a motor, an electromagnetic valve, and a relay. The electric signal under the whole vehicle can be triggered when a power switch of the whole vehicle is turned OFF by ON, and can trigger the electric signal ON the whole vehicle when the power switch of the whole vehicle is turned ON by OFF, and the control module 1011 is also used for directly controlling the electric component to enter a power supply state without timing when receiving the electric signal ON the whole vehicle.

Therefore, after the electric signal under the whole vehicle is received, the delayed power-off is realized, the time can be provided for the soft power-off of the power utilization assembly, the damage of the instantaneous power-off to the power utilization assembly can be avoided, and the reliability of a vehicle power supply system can be improved.

Optionally, the vehicle power supply circuit further includes a first relay 103, the first relay 103 is connected between the control module 1011 and the delay component 1012, and the control module 1011 is configured to control the first relay 103 to be turned off when receiving an electrical signal under the whole vehicle;

the first relay 103 is configured to generate a timing trigger signal after being turned off, so as to trigger the delay component 1012 to start timing.

Wherein the first relay 103 may be an unloading relay IG in a vehicle_x(e.g., IG₃，IG₄) One end of the control coil of the first relay 103 may be connected to the control module 1011, and the other end may be grounded, so that high power is output from the control module 1011When the signal is flat, the control coil of the first relay 103 is powered on, so that the control switch of the first relay 103 is closed, and when the control module 1011 outputs a low-level signal, the control coil of the first relay 103 is powered off, so that the control switch of the first relay 103 is opened.

Optionally, the delay component 1012 includes a clock signal generator 10121 and a timer 10122, a control terminal of the clock signal generator 10121 is connected to the first relay 103, and an output terminal of the clock signal generator 10121 is connected to the timer 10122;

the clock signal generator 10121 is configured to output a clock signal to the timer 10122 to trigger the timer 10122 to time when the timing trigger signal is received;

the timer 10122 is configured to output a power supply maintaining signal to the power consumption component 102 to control the power consumption component 102 to be in a power supply state when the recorded duration is less than or equal to the preset duration; and the power supply module is further configured to output a power-off control signal to the power consumption module 102 to control the power consumption module 102 to be powered off when the recorded duration is greater than the preset duration.

The power supply maintaining signal may be a switching signal for controlling the power consuming component 102 to be switched on with the normal power module 104 in the vehicle, and the power cut control signal may be a switching signal for controlling the power consuming component 102 to be switched off with the normal power module 104 in the vehicle.

For example, the clock signal generator 10121 may include a CD4060 chip, and the timer 10122 may include a CD4518 chip, and it should be noted that the clock signal generator 10121 and the timer 10122 may also be other devices having functions of triggering a clock signal and implementing timing in the prior art, and the types and models of the clock signal generator and the timer in the prior art are many, and the disclosure is not limited thereto.

Optionally, the time delay component 1012 further includes a switch circuit 10123, the switch circuit 10123 is configured to maintain the connection between the powered component 102 and the normal power module 104 of the vehicle when receiving the power supply maintaining signal; and is further used for disconnecting the electricity utilization assembly 102 from the vehicle's normal electricity module 104 when the power failure control signal is received.

The switch circuit 10123 may be a circuit formed by a diode and a triode, or may be a control switch formed by one or more electromagnetic switches, and the constant current module 104 is a low-voltage power supply always in a power supply state in the vehicle.

For example, as shown in fig. 2, fig. 2 is a circuit diagram of a vehicle power supply circuit according to the embodiment shown in fig. 1 of the present disclosure, the switch circuit 10123 may include a first backward diode F1, a transistor Q1 and a second relay K2, an output terminal of the timer 10122 is connected to a base of the transistor Q1 through the first backward diode F1, an emitter of the transistor Q1 is grounded, a collector of the transistor Q1 is connected to the normal power module 104 through a control coil of the second relay K2, and a control switch of the second relay K2 is connected to the normal power module 104 at one end and to the power consuming component 102 at the other end.

The timer 10122 is configured to output the power supply maintaining signal to the transistor Q1 when a recorded time length is less than or equal to the preset time length;

the transistor Q1 is turned on after receiving the power supply maintaining signal, and when the transistor Q1 is turned on, the second relay K2 is closed to enable the power consuming component 102 to be in a power supply state;

the timer 10122 is further configured to output the power-off control signal to the triode Q1 when the recorded duration is greater than the preset duration;

the transistor Q1 is further configured to turn off after receiving the power-off control signal, and the second relay K2 is turned off to power off the power-consuming component 102 when the transistor Q1 is turned off.

In addition, optionally, the time delay component 1012 further includes a second backward diode F2, an input terminal of the second backward diode F2 is connected to an output terminal of the first backward diode F1, and an output terminal of the second backward diode F2 is connected to the timer 10122;

the second backward diode F2 is configured to control the timer 10122 to stop timing when the recorded duration is greater than the preset duration.

In fig. 2, the control module 1011 is a BCM in a vehicle, a first relay K1 is connected between the BCM and the clock signal generator 10121, and the first relay K1 may be an unloading relay IG in the vehicle_x(e.g., IG₃，IG₄) The unloading relay IG_xThe control coil of the first relay K1 has one end connected to the BCM and the other end grounded, one end of the control switch of the first relay K1 is connected to the constant current module 104, the other end is connected to the Reset port of the CD4060 chip, the Reset port of the CD4060 chip is also connected to a first power-on Reset circuit, the first power-on Reset circuit is used for resetting the CD4060 chip when the delay assembly is powered on for the first time, the first power-on Reset circuit includes a capacitor C1 and a resistor R1, one end of the capacitor C1 is connected to the Reset port of the CD4060 chip, the other end is connected to the constant current module 104, one end of the resistor R1 is connected to the Reset port of the CD4060 chip, and the other end is grounded; a time-base oscillator circuit formed by a resistor R2, a crystal oscillator Y1, a capacitor C2 and a capacitor C3 is connected between the phi 0 port and the phi 1 port of the CD4060 chip, wherein the resistor R2 is connected with the crystal oscillator Y1 in parallel, one end of the resistor R2 is connected with the phi 0 port, the other end of the resistor R2 is connected with the phi 1 port, one end of the capacitor C2 is connected with the phi 0 port, the other end of the capacitor C2 is grounded, one end of the capacitor C3 is connected with the phi 1 port, the other end of the capacitor C3 is grounded, the Q14 port of the CD4060 chip is connected with the EN port of the CD4518 chip, the Reset port of the CD4518 chip is provided with a second power-on Reset circuit, the second power-on Reset circuit is used for resetting the CD4518 chip when the time delay assembly is powered on for the first time, the second power-on Reset circuit is composed of the capacitor C4 and the resistor R3, one end of the capacitor C4 is connected with the Reset port of the CD4518 chip of the constant current module 104, one end of the resistor R3 is connected with the Reset port of the constant current module 18, the other end is grounded, the input end of a first reverse diode F1 is connected with the Q4 port of the CD4518 chip, and the output end is connected with the triode Q1 through a resistor R4The base is connected, the input end of the second backward diode F2 is connected with the output end of the first backward diode F1, the output end of the second backward diode F2 is connected with the Clock port of the CD4518, one end of the resistor R5 is connected with the base of the triode Q1, and the other end is grounded.

In actual operation, when the vehicle power switch is turned ON from OFF, the BCM detects an ON signal (for example, a voltage signal of 12V), outputs a high signal to energize the control coil of the first relay K1, the control switch of the first relay K1 is closed, and when the control switch of the first relay K1 is closed, the Reset terminal of the CD4060 chip is high, at this time, the CD4060 chip is in a Reset state, the time-base oscillator between the Φ 0 port and the Φ 1 port of the CD4060 chip is disabled, the output port Q14 of the CD4060 chip does not output a clock signal, i.e., the EN port of the CD4518 does not receive a clock signal, so that the Q4 port of the CD4518 outputs a low signal, which, under the reverse action of the first reverse diode F1, brings the base of the transistor Q1 into a high state, so that the transistor Q1 is turned ON, and the control coil 2 of the second relay K1 at the transistor Q1 is turned ON, the control switch of the second relay K2 is closed, the electric component 102 is connected with the normal electric module 104, and the electric component 102 is in a power supply state.

When the power switch of the whole vehicle is turned OFF from ON, the BCM cannot detect an ON signal (or detects that a voltage signal is 0), the BCM outputs a low level signal to make the control coil of the first relay K1 lose power, the control switch of the first relay K1 is turned OFF, when the control switch of the first relay K1 is turned OFF, the Reset port of the CD4060 chip is at a low level, at the moment, the CD4060 chip is in a normal working state, that is, the Q14 port of the CD4060 chip outputs a clock signal of 14 frequency division (namely, every 2 th of clock signal)¹⁴Making a level inversion), the EN port of the CD4518 chip receives a Clock signal, the Clock terminal of the CD4518 chip is set to 0, that is, the CD4518 chip is triggered to count by the falling edge of the EN port (from high level to low level), when the time length recorded by the CD4518 chip is less than or equal to the preset time length, the Q4 port outputs a low level signal, and the low level signal is in the first reverse direction and in the second reverse directionUnder the reverse action of the transistor F1, the base of the transistor Q1 is in a high level state, so that the transistor Q1 is turned on, the control coil of the second relay K2 at the collector of the transistor Q1 is powered, the control switch of the second relay K2 is closed, the electricity utilization component 102 is connected with the normal power module 104, and the electricity utilization component 102 is in a time-delay power supply state; when the time length recorded by the CD4518 chip is longer than the preset time length, the Q4 port outputs a high level signal, the high level signal makes the base of the triode Q1 be in a low level state under the reverse action of the first reverse diode F1, so that the triode Q1 is cut off, the control coil of the second relay K2 at the collector of the triode Q1 is de-energized, the control switch of the second relay K2 is opened, the electric component 102 is disconnected with the normal power module, and the electric component 102 is de-energized. The power supply system can realize delayed power-OFF after receiving an electric signal (which is turned OFF by ON) under the whole vehicle, can provide time for soft power-OFF of the power utilization assembly, can avoid damage to the power utilization assembly caused by instantaneous power-OFF, and can improve the reliability of the vehicle power supply system.

In addition, when the time length recorded by the CD4518 chip is longer than the preset time length and the Q4 port outputs a high level signal, the high level signal firstly passes through the reverse action of the first backward diode F1 and then passes through the action of the second backward diode F2, and the Clock port of the CD4518 chip is set to 1, so that the CD4518 chip stops timing. Therefore, the problem that unnecessary energy loss is caused because the timer is still in a timing state after the delay time can be solved, and the electric quantity loss can be effectively reduced.

Another exemplary embodiment of the present disclosure shows a vehicle power supply system including the vehicle power supply circuit shown in fig. 1 or fig. 2 above.

Yet another exemplary embodiment of the present disclosure shows a vehicle including the above vehicle power supply system.

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

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

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