WO2025086610A1 - Power supply circuit and emergency equipment - Google Patents

Abstract

A power supply circuit (1) and emergency equipment. The power supply circuit (1) comprises: a load interface circuit (10) used for connecting a load (3); a power supply switch circuit (20), used for connecting an energy storage assembly (2) and the load interface circuit (10); an air pump switch circuit (30), the air pump switch circuit (30) being arranged in a power supply path formed by the energy storage assembly (2) and an air pump body (4); and a main control circuit (40) connected to the power supply switch circuit (20) and the air pump body (4), wherein the main control circuit (40) is used for controlling the power supply switch circuit (20) to close or open a power supply path between the energy storage assembly (2) and a load (3), and controlling the air pump switch circuit (30) to close or open the power supply path between the energy storage assembly (2) and the air pump body (4), and the load (3) comprises at least one of a starter and a vehicle battery.

Description

Power supply circuits and emergency equipment Technical Field

The present application relates to the field of power supply technology, and in particular to a power supply circuit and emergency equipment.

Background Art

In the use scenario of motor vehicles, when starting the vehicle engine, the battery is required to provide starting current for ignition starting, but the battery cannot provide starting current for the vehicle when the power is insufficient. On the other hand, when the tire pressure of the vehicle is insufficient, the driving of the vehicle will be greatly affected.

Therefore, in order to ensure the smooth driving of the vehicle, the owner often needs to prepare a starting power supply or battery clamp for emergency power supply to the battery and an air pump for inflating the tires. However, carrying a starting power supply and an air pump at the same time will take up a large space, and the process of inflating with an air pump also requires power support.

Moreover, there are some problems with the current starting power supplies on the market. For example, the existing starting power supplies need to be manually operated to control the starting power supply to start outputting power, which is not convenient and intelligent enough. For another example, when the starting power supply is reversely connected to the battery, ignition of the vehicle may easily cause damage to the battery or cause fire.

Summary of the invention

The main purpose of the present application is to provide a power supply circuit and emergency equipment, aiming to realize the functions of emergency ignition for automobiles and inflating tires in the same emergency equipment, centrally and flexibly control the operation of the two functions, reduce the size of the emergency equipment to make the product easy to carry, and improve the safety of emergency ignition.

In a first aspect, the present application provides a power supply circuit, the power supply circuit comprising:

A load interface circuit, used for connecting a load;

A power switch circuit, used to connect the energy storage component and the load interface circuit;

An air pump switch circuit, which is arranged in a power supply path formed by the energy storage component and the air pump body;

A main control circuit is connected to the power supply switch circuit and the air pump body;

The main control circuit is used to control the power supply switch circuit to turn on or off the power supply path between the energy storage component and the load, and is also used to control the air pump switch circuit to turn on or off the power supply path between the energy storage component and the air pump body;

The load includes at least one of a starter and a vehicle battery.

In a second aspect, the present application further provides an emergency device, which includes a shell, an energy storage component and any one of the power supply circuits provided in the application embodiments, wherein at least part of the energy storage component and the power supply circuit are arranged in the shell.

In summary, the present application provides a power supply circuit and emergency equipment, the power supply circuit includes: a load interface circuit, used to connect the load; a power supply switch circuit, used to connect the energy storage component and the load interface circuit; an air pump switch circuit, the air pump switch circuit is arranged in the power supply path formed by the energy storage component and the air pump body; a main control circuit, connected to the power supply switch circuit and the air pump body; the main control circuit is used to control the power supply switch circuit to turn on or off the power supply path between the energy storage component and the load, and is also used to control the air pump switch circuit to turn on or off the power supply path between the energy storage component and the air pump body; wherein the load includes at least one of a starter and a vehicle battery. The power supply circuit and emergency equipment provided in the embodiments of the present application are compatible with the functions of emergency ignition for automobiles and inflating tires, and can flexibly control the circuit operations corresponding to the two functions, while reducing the size of the emergency equipment to make the product easy to carry, and improving the safety of emergency ignition.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a schematic diagram of a module of a power supply circuit according to an embodiment of the present application;

FIG2 is a schematic diagram of a module structure of another embodiment of a power supply circuit provided in an embodiment of the present application;

FIG3 is a schematic diagram of a circuit structure of a power supply circuit provided in an embodiment of the present application;

FIG4 is a schematic diagram of a circuit structure of an implementation manner of a first detection circuit in a power supply circuit provided in an embodiment of the present application;

[Corrected 24.05.2024 in accordance with Article 91]
FIG5 is a schematic diagram of a circuit structure of another implementation of a first detection circuit in a power supply circuit provided in an embodiment of the present application;

FIG6 is a schematic diagram of a circuit structure of an implementation manner of a second detection circuit in a power supply circuit provided in an embodiment of the present application;

FIG7 is a schematic diagram of a module structure of another implementation of a power supply circuit provided in an embodiment of the present application;

FIG8 is a schematic diagram of the circuit structure of an air pump switch circuit in an embodiment of a power supply circuit provided in an embodiment of the present application;

FIG9 is a schematic diagram of a module of an emergency device according to an embodiment of the present application;

FIG. 10 is a module diagram of another implementation of the emergency equipment provided in an embodiment of the present application.

Description of the accompanying drawings: 1. power supply circuit; 2. energy storage component; 3. load; 4. air pump body; 5. housing; 6. emergency equipment; 10. load interface circuit; 20. power supply switch circuit; 30. air pump switch circuit; 40. main control circuit; 50. first detection circuit; 60. second detection circuit; 70. alarm circuit; 80. conversion circuit; 91. first trigger module; 92. second trigger module; 93. third trigger module; 94. fourth trigger module; B1, Positive input terminal; B2, negative input terminal; P1, positive output terminal; P2, negative output terminal; K1, third switch; Q1, switch tube; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; R6, sixth resistor; R7, seventh resistor; R8, eighth resistor; R9, ninth resistor; C1, first capacitor; C2, second capacitor; V1, regulated power supply; D1, light source; D2, light receiver; K1, first switch.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations/steps, nor must they be executed in the order described. For example, some operations/steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

Please refer to FIG. 1 , which is a module diagram of an implementation of a power supply circuit provided in an embodiment of the present application.

As shown in FIG. 1 , the power supply circuit 1 at least includes the following circuit components: a load interface circuit 10 , a power supply switch circuit 20 , an air pump switch circuit 30 and the main control circuit 40 . Each component is described in detail below.

Specifically, the load interface circuit 10 is used to connect the load 3, the power switch circuit 20 is used to connect the energy storage component 2 and the load interface circuit 10, and the air pump switch circuit 30 is provided in the power supply path formed by the energy storage component 2 and the air pump body 4. Then, when the load 3 is connected to the load interface circuit 10 of the power supply circuit 1, the air pump body 4 is connected to the air pump switch circuit 30, and the energy storage component 2 is connected to the power supply circuit 1, the energy storage component 2 is connected to the load 3 through the power switch circuit 20 and the load interface circuit 10, and the energy storage component 2, the air pump body 4 and the air pump switch circuit 30 form a power supply path.

The load 3 includes at least one of a starter and a vehicle battery.

The air pump body 4 is used to perform an inflating operation under the condition of power input, for example, to inflate the tire of a vehicle.

Specifically, the main control circuit 40 is used to control the power supply switch circuit 20 to turn on or off the power supply path between the energy storage component 2 and the load 3, and is also used to control the air pump switch circuit 30 to turn on or off the power supply path between the energy storage component 2 and the air pump body 4.

It should be noted that the power switch circuit 20 has a switchable on state and an off state, and the main control circuit 40 can output to the power switch circuit 20: a first signal for indicating that the power switch circuit 20 is on and a second signal for indicating that the power switch circuit 20 is off.

Under the condition that the main control circuit 40 outputs a first signal to the power switch circuit 20, the power switch circuit 20 switches to the on state in response to the first signal, so that the power supply path formed by the energy storage component 2, the power switch circuit 20, the load interface circuit 10 and the load 3 is turned on, and the energy storage component 2 can supply power to the load 3. On the other hand, under the condition that the main control circuit 40 outputs a second signal to the power switch circuit 20, when the power switch circuit 20 switches to the off state in response to the second signal, the power supply path formed by the energy storage component 2, the power switch circuit 20, the load interface circuit 10 and the load 3 is turned off, and the energy storage component 2 stops supplying power to the load 3.

Taking load 3 as at least one of a starter and a vehicle battery as an example, when the vehicle cannot ignite normally due to insufficient battery power, the energy storage component 2 supplies power to load 3 to assist the vehicle in emergency ignition.

It should also be noted that the air pump switch circuit 30 also has a switchable on state and off state, and the main control circuit 40 can output to the air pump switch circuit 30: a third signal for indicating that the air pump switch circuit 30 is on and a fourth signal for indicating that the air pump switch circuit 30 is off.

Under the condition that the main control circuit 40 outputs the third signal to the air pump switch circuit 30, the air pump switch circuit 30 switches to the on state in response to the third signal, so that the energy storage component 2, the air pump body 4 and the air pump switch circuit 30 form a conductive power supply circuit 1, and the energy storage component 2 supplies power to the air pump body 4 to support the air pump body 4 to perform the pumping operation. On the other hand, under the condition that the main control circuit 40 outputs the third signal to the air pump switch circuit 30, the air pump switch circuit 30 switches to the off state, and the energy storage component 2 cannot supply power to the air pump body 4.

The power supply circuit 1 provided in the embodiment of the present application is compatible with the functions of emergency ignition for a car and inflating tires, and can centrally control the power-on or power-off of the circuits corresponding to the two functions, thereby flexibly controlling the two functions of the power supply circuit 1, while optimizing the circuit structure of the power supply circuit 1 and reducing the circuit size.

Please refer to FIG. 2 , which is a schematic diagram of a module structure of another implementation of a power supply circuit provided in an embodiment of the present application.

As shown in FIG. 2 , in some embodiments, the power supply circuit 1 further includes an energy storage component 2 , and the energy storage component 2 is connected to the power supply switch circuit 20 , that is, the energy storage component 2 is a component of the power supply circuit 1 .

As shown in FIG. 2 , in some embodiments, the power supply circuit 1 further includes an air pump body 4 , and the energy storage component 2 , the air pump body 4 and the air pump switch circuit 30 form a power supply path, that is, the air pump body 4 is an integral part of the power supply circuit 1 .

It should be noted that the above two implementations can be implemented in combination, that is, the energy storage component 2 and the air pump body 4 are simultaneously provided in the power supply circuit 1 .

As shown in FIG. 1 and FIG. 2 , in some embodiments, the main control circuit is used to control the power supply switch circuit 20 to disconnect the power supply path between the energy storage component 2 and the load 3 when it is detected that the load 3 is reversely connected to the load interface circuit 10 .

Specifically, when the main control circuit 40 detects that the load 3 is reversely connected to the load interface circuit 10 , the main control circuit 40 outputs a second signal to the power supply switch circuit 20 to disconnect the power supply path between the energy storage component 2 and the load 3 .

Furthermore, when the load 3 is reversely connected to the load interface circuit 10, even if the user instructs the main control circuit 40 to control the power switch circuit 20 to turn on, the main control circuit 40 continues to output a second signal to the power switch circuit 20, so that the power switch circuit 20 remains in the off state, thereby improving power supply safety.

Therefore, the power supply circuit 1 provided in the embodiment of the present application can sensitively detect whether there is any abnormality in the access of the load 3 to avoid emergency power supply to the abnormally connected load 3, thereby improving power supply safety.

As shown in Figures 1 and 2, in some embodiments, the main control circuit 40 is also used to output a third signal to the air pump switch circuit 30 under the condition of receiving an air pump trigger signal to open the power supply path between the energy storage component 2 and the air pump body 4 to enable the air pump body 4 to work.

It should be noted that the air pump trigger signal can be an external input trigger signal or a trigger signal generated by the power supply circuit 1 in response to a user operation, for example, when a preset button in the power supply circuit 1 is triggered by an operation.

Please refer to Figures 3 and 4. Figure 3 is a schematic diagram of the circuit structure of the power supply circuit provided in an embodiment of the present application, and Figure 4 is a schematic diagram of the circuit structure of an implementation of the first detection circuit in the power supply circuit provided in an embodiment of the present application.

As shown in FIGS. 1 to 4 , in some embodiments, the power supply circuit 1 further includes a first detection circuit 50, which is connected to the load interface circuit 10 and the main control circuit 40, and is used to detect the strength of the electrical signal at the load interface circuit 10, and output the detection result to the main control circuit 40;

The main control circuit 40 is used to determine that the load 3 is reversely connected to the load interface circuit 10 under the condition that the strength of the electrical signal at the load interface circuit 10 does not exceed the second strength threshold.

Exemplarily, the electrical signal strength at the load interface circuit 10 may be a voltage value or a current value at a connection point of the load interface circuit 10 , and the detection result may be a specific value of the voltage or current, or a high or low level.

In some implementations, a positive output terminal P1 and a negative output terminal P2 are provided in the load interface circuit 10 , and the electrical signal strength at the load interface circuit 10 includes a voltage value at the positive output terminal P1 of the load interface circuit 10 .

Specifically, the positive output terminal P1 and the negative output terminal P2 in the load interface circuit 10 are used to be connected one by one with the positive pole and the negative pole of the load 3, wherein, when the load 3 is correctly connected to the load interface circuit 10, the positive pole of the load 3 is connected to the positive output terminal P1, and the negative pole of the load 3 is connected to the negative output terminal P2.

Accordingly, the first detection circuit 50 is specifically used to detect the voltage of the positive output terminal P1 as the electrical signal strength at the load interface circuit 10. Thus, the main control circuit 40 can sensitively detect whether there is an abnormality in the access of the load 3 to avoid emergency power supply to the abnormally connected load 3, thereby improving power supply safety.

As shown in Figure 4, in some embodiments, the first detection circuit 50 includes an optocoupler 51, which includes a light source D1 for outputting a light signal under the drive of an input voltage and a light receiver D2 having an on state and an off state, wherein the light receiver D2 switches to the on state under the condition of an optical signal input.

Specifically, one end of the light source D1 is connected to the positive output terminal P1 of the load interface circuit 10, and the other end of the light source D1 is grounded. One end of the light receiver D2 of the optocoupler 51 is connected to the main control circuit 40 and the preset voltage-stabilized power supply V1, and the other end is grounded. The light source D1 is used to emit an optical signal to the light receiver D2 when the positive output terminal P1 of the load interface circuit 10 is connected to the negative pole of the load 3, so as to turn on the light receiver D2.

Specifically, the anode of the light source D1 is grounded, and the cathode of the light source D1 is connected to the positive output terminal P1 of the load interface circuit 10. When the anode voltage of the light source D1 exceeds the preset difference of the cathode voltage, the light source D1 emits a light signal to the light receiver D2 to turn on the light receiver D2.

Furthermore, the first detection circuit 50 also includes a first resistor R1, a second resistor R2 and a third resistor R3, wherein the first end of the first resistor R1 is connected to the positive output end P1 of the load interface circuit 10, the second end of the first resistor R1 is connected to the light source D1 of the optocoupler 51, the first end of the second resistor R2 is connected to the second end of the first resistor R1, the second end of the second resistor R2 is grounded, the first end of the third resistor R3 is connected to the regulated power supply V1, and the second end of the third resistor R3 is connected to the light receiver D2 of the optocoupler 51 and the main control circuit 40.

The working principle of the above-mentioned first detection circuit 50 is explained as follows: when the load 3 is reversely connected to the load interface circuit 10, the negative pole of the load 3 is connected to the positive output terminal P1 of the load interface circuit 10, then the cathode voltage of the light source D1 is less than 0, and the anode voltage of the light source D1 exceeds the preset difference of the cathode voltage, and a light signal is emitted to the photoreceiver D2 to turn on the photoreceiver D2, and the main control circuit 40 detects that the voltage at the connection between the main control circuit 40 and the photoreceiver D2 is pulled down, and determines that the load 3 and the load interface circuit 10 are reversely connected.

On the contrary, when the load 3 is correctly connected to the load interface circuit 10, the positive pole of the load 3 is connected to the positive output terminal P1 of the load interface circuit 10, the electrical signal at the positive output terminal P1 of the load interface circuit 10 is a high-level signal, and the anode voltage of the light source D1 is less than the cathode voltage, then the light source D1 does not emit a light signal, the photoreceiver D2 remains in the off state, and the main control circuit 40 detects that the voltage at the connection between the main control circuit 40 and the photoreceiver D2 is stable.

On the other hand, when the load 3 is not connected to the load interface circuit 10, the electrical signal at the positive output terminal P1 of the load interface circuit 10 is 0, the light source D1 also does not emit a light signal, the photoreceiver D2 remains in the off state, and the main control circuit 40 detects that the voltage at the connection between the main control circuit 40 and the photoreceiver D2 is stable.

Therefore, when the main control circuit 40 detects that the voltage at the connection between the main control circuit 40 and the photoreceiver D2 is stable, it is determined that the load 3 is correctly connected to the load interface circuit 10 or is not connected to the load interface circuit 10; when it is detected that the voltage at the connection between the main control circuit 40 and the photoreceiver D2 is pulled down, it is determined that the load 3 and the load interface circuit 10 are reversely connected, thereby sensitively detecting whether there is any abnormality in the connection of the load 3 to avoid emergency power supply to the abnormally connected load 3, thereby improving power supply safety.

In some other embodiments, the first detection circuit 50 includes a comparator, an input end of the comparator is connected to the load interface circuit 10 , and an output end of the comparator is connected to the main control circuit 40 .

Specifically, the comparator has a positive input terminal, a negative input terminal and an output terminal, wherein the comparator is used to compare the signal strength of the signal input to the positive input terminal of the comparator with the signal input to the negative input terminal of the comparator, and output a signal matching the comparison result from the output terminal of the comparator as a detection result.

Exemplarily, the positive input terminal of the comparator is connected to the positive output terminal P1 of the load interface circuit 10 to obtain the electrical signal strength at the load interface circuit 10, and the negative input terminal of the comparator is connected to a preset reference power supply.

When the load 3 is correctly connected to the load interface circuit 10, the positive pole of the load 3 is connected to the positive output terminal P1 of the load interface circuit 10, and the negative pole of the load 3 is connected to the negative output terminal P2 of the load interface circuit 10, then the signal strength at the positive input terminal of the comparator is greater than the signal strength at the negative input terminal of the comparator, and the comparator outputs a corresponding high-level signal from the output terminal, so that the main control circuit 40 determines that the load 3 is correctly connected to the load interface circuit 10.

On the contrary, when the load 3 is reversely connected to the load interface circuit 10, the positive pole of the load 3 is connected to the negative output terminal P2 of the load interface circuit 10, and the negative pole of the load 3 is connected to the positive output terminal P1 of the load interface circuit 10, then the signal strength at the positive input terminal of the comparator is less than the signal strength at the negative input terminal of the comparator, and the comparator outputs a corresponding low-level signal from the output terminal, so that the main control circuit 40 determines that the load 3 is reversely connected to the load interface circuit 10.

In some other embodiments, the first detection circuit 50 includes a transistor, a first end of the transistor is connected to the positive output terminal P1 of the load interface circuit 10 to obtain the electrical signal strength at the load interface circuit 10, a second end of the transistor is connected to the negative output terminal P2 of the load interface circuit 10, and a third end of the transistor is connected to the main control circuit 40.

Specifically, if the signal strength of the third end of the transistor matches the difference between the signal strengths of the first end and the second end, the main control circuit 40 can detect the signal at the third end of the transistor to determine whether the electrical signal strength at the load interface circuit 10 exceeds the second strength threshold, and whether the load 3 is reversely connected to the load interface circuit 10.

Please refer to FIG. 5 , which is a schematic diagram of a circuit structure of an implementation of a first detection circuit in a power supply circuit provided in an embodiment of the present application.

As shown in Figures 3 and 5, in other embodiments, the first detection circuit 50 includes a fourth resistor R4, a fifth resistor R5 and a first capacitor C1, wherein the first end of the fourth resistor R4 is connected to the positive input terminal B1, the second end of the fourth resistor R4 is connected to the first end of the fifth resistor R5, the second end of the fifth resistor R5 is grounded, the main control circuit 40 is connected to the second end of the fourth resistor R4 and the first end of the fifth resistor R5; and the first end of the first capacitor C1 is connected to the first end of the fifth resistor R5, and the second end of the first capacitor C1 is connected to the second end of the fifth resistor R5.

The working principle of the above-mentioned first detection circuit 50 is explained: when the energy storage component 2 is correctly connected to the power supply switch circuit 20, the positive electrode of the energy storage component 2 is connected to the positive input terminal B1, and is grounded through the positive input terminal B1, the fourth resistor R4 and the fifth resistor R5 in sequence. The fourth resistor R4 and the fifth resistor R5 cooperate to divide the voltage of the positive electrode of the energy storage component 2 to obtain the voltage division of the energy storage component 2, and use the voltage division as an output to the detection result main control circuit 40, so that the main control circuit 40 obtains the voltage size of the energy storage component 2 according to the detection result.

The first capacitor C1 and the fifth resistor R5 are designed to be connected in parallel to absorb the voltage fluctuations that may occur in the voltage of the energy storage component 2 and its voltage division, thereby buffering the voltage division and protecting the electronic devices.

In some embodiments, the main control circuit 40 is used to cause the power supply switch circuit 20 to conduct the power supply path between the energy storage component 2 and the load 3 when it is detected that the load 3 performs a preset operation.

Specifically, when the main control circuit 40 detects that the load 3 performs a preset operation, the main control circuit 40 outputs a first signal to the power supply switch circuit 20 so that the power supply switch circuit 20 turns on the power supply path between the energy storage component 2 and the load 3 .

Illustratively, in this embodiment, the preset operation includes but is not limited to: load 3 performs an ignition operation.

Taking load 3 as at least one of a starter and a vehicle battery as an example, when load 3 is connected to the load interface circuit 10 and the vehicle performs an ignition operation, the electrical signal strength at the connection between the load interface circuit 10 and the load 3 will fluctuate greatly in a short period of time. Therefore, the main control circuit 40 can detect that the load 3 performs a preset operation such as an ignition operation based on the electrical signal strength at the load interface circuit 10.

Furthermore, when the load 3 is reversely connected to the load interface circuit 10, even if the load 3 performs a preset operation, the main control circuit 40 continues to output the second signal to the power switch circuit 20, so that the power switch circuit 20 remains in the off state, thereby improving power supply safety.

Therefore, the power supply circuit 1 provided in the embodiment of the present application can automatically control the power supply path between the energy storage component 2 and the load 3 when it is detected that the load 3 performs a preset operation, so that it can sensitively respond to the operation of the load 3 to control the power supply circuit 1 to supply power to the load 3, thereby improving the user experience of using the power supply circuit to provide emergency power supply for the starter or vehicle battery.

In some embodiments, the main control circuit is used to determine that the load performs a preset operation when it is detected that the decrease amplitude of the electrical signal strength at the load interface circuit exceeds a preset amplitude threshold within a first preset time period.

Taking load 3 as at least one of a starter and a vehicle battery as an example, when load 3 is connected to load interface circuit 10 and the vehicle is ignited, the electrical signal strength at the connection between load 3 and load interface circuit 10 will drop in a short time.

Therefore, if the electrical signal strength at the load interface circuit 10 decreases by more than the preset amplitude threshold within the first preset time period, it can be indicated that the vehicle is undergoing an ignition operation, and the main control circuit 40 can determine that the load 3 performs a preset operation.

Exemplarily, the electrical signal strength at the load interface circuit 10 may be a voltage value or a current value at the connection point of the load interface circuit 10. For example, the first preset time length is 2ms, and the second electrical signal strength is 1V. That is, when the voltage strength at the connection point between the load 3 and the load interface circuit 10 drops by more than 1V within 2ms, it is determined that the vehicle is performing an ignition operation, and the main control circuit 40 may determine that the load 3 performs a preset operation.

Therefore, the main control circuit 40 can sensitively detect whether the load 3 performs an ignition operation, and promptly respond to the ignition operation of the load 3 to automatically control the power supply circuit 1 to supply power to the load 3.

In some embodiments, the main control circuit is further configured to not control the power supply switch circuit 20 to conduct the power supply path between the energy storage component 2 and the load 3 when the voltage of the energy storage component 2 does not exceed the first preset voltage threshold; and/or,

The main control circuit is also used to control the power supply switch circuit 20 to conduct the power supply path between the energy storage component 2 and the load 3 when the voltage of the energy storage component 2 exceeds a first preset voltage threshold.

It should be noted that the above two implementation modes can be implemented separately or in combination.

The specific method of combining the above two implementation modes is described by way of example:

The main control circuit 40 obtains the voltage of the energy storage component 2. When the voltage of the energy storage component 2 does not exceed the first preset voltage threshold, even if the main control circuit 40 detects that the load 3 performs a preset operation or other operations input from the outside, it does not output the first signal to the power supply switch circuit 20, so that the power supply switch circuit 20 remains turned off; and when the voltage of the energy storage component 2 exceeds the first preset voltage threshold, the power supply switch circuit 20 is allowed to be controlled to turn on the power supply path between the energy storage component 2 and the load 3.

In some embodiments, the main control circuit is further configured to not control the air pump switch circuit 30 to conduct the power supply path between the energy storage component 2 and the air pump body 4 when the voltage of the energy storage component 2 does not exceed the second preset voltage threshold; and/or,

The main control circuit is also used to control the air pump switch circuit 30 to conduct the power supply path between the energy storage component 2 and the air pump when the voltage of the energy storage component 2 exceeds the second preset voltage threshold.

It should be noted that the above two implementation modes can be implemented separately or in combination.

The specific method of combining the above two implementation modes is described by way of example:

The main control circuit 40 obtains the voltage of the energy storage component 2. When the voltage of the energy storage component 2 does not exceed the second preset voltage threshold, even if the main control circuit 40 detects that the load 3 performs a preset operation or other operations input from the outside, it does not output the third signal to the air pump switch circuit 30, so that the air pump switch circuit 30 remains turned off; and when the voltage of the energy storage component 2 exceeds the second preset voltage threshold, it is allowed to control the air pump switch circuit 30 to turn on.

It should also be noted that the first preset voltage threshold and the second preset voltage threshold can be set to the same value, or can be set to different values, which is not specifically limited here.

It should be understood that if the voltage of the energy storage component 2 does not exceed the first preset voltage threshold/the second preset voltage threshold, it may be that an abnormal state occurs, such as insufficient power of the energy storage component 2, the energy storage component 2 is not properly connected to the power supply circuit 1, or the positive and negative poles of the energy storage component 2 are short-circuited. In this case, the main control circuit 40 controls the power supply switch circuit 20 and/or the air pump switch circuit 30 to remain turned off to avoid invalid conduction of the power supply switch circuit 20 and/or the air pump switch circuit 30, and further avoids the abnormal state of the energy storage component 2 causing damage to at least one of the energy storage component 2, the power supply circuit 1, the load 3 and the air pump body 4.

Furthermore, when the voltage of the energy storage component 2 does not exceed the first preset voltage threshold/the second preset voltage threshold, the main control circuit 40 also controls the corresponding alarm circuit to output an alarm signal to inform the user that the energy storage component 2 is low on power, and remind the user to promptly replace the energy storage component 2, correctly reconnect the energy storage component 2, or charge the energy storage component 2, thereby protecting the energy storage component 2, the power supply circuit 1, the load 3, and the air pump body 4.

Please refer to FIG. 6 , which is a schematic diagram of a circuit structure of an implementation of a second detection circuit in a power supply circuit provided in an embodiment of the present application.

As shown in Figures 3 and 6, in some embodiments, the power supply circuit 1 also includes a second detection circuit 60, which is used to connect the energy storage component 2 and the main control circuit to detect the voltage of the energy storage component 2, and output the detection result to the main control circuit, so that the main control circuit 40 obtains the voltage of the energy storage component 2 according to the detection result.

Specifically, a positive input terminal B1 and a negative input terminal B2 are provided in the power supply switch circuit 20, which are used to be connected one by one with the positive pole and the negative pole of the energy storage component 2. When the energy storage component 2 is correctly connected to the power supply switch circuit 20, the positive pole of the energy storage component 2 is connected to the positive input terminal B1, and the negative pole of the energy storage component 2 is connected to the negative input terminal B2.

Correspondingly, the second detection circuit 60 is specifically used to detect the voltage of the positive input terminal B1 to obtain the voltage of the energy storage component 2 .

Specifically, the second detection circuit 60 includes a sixth resistor R6, a seventh resistor R7 and a second capacitor C2, wherein the first end of the sixth resistor R6 is connected to the positive input terminal B1, the second end of the sixth resistor R6 is connected to the first end of the seventh resistor R7, the second end of the seventh resistor R7 is grounded, the main control circuit 40 is connected to the second end of the sixth resistor R6 and the first end of the seventh resistor R7; and the first end of the second capacitor C2 is connected to the first end of the seventh resistor R7, and the second end of the second capacitor C2 is connected to the second end of the seventh resistor R7.

The working principle of the above-mentioned second detection circuit 60 is explained: when the energy storage component 2 is correctly connected to the power supply switch circuit 20, the positive electrode of the energy storage component 2 is connected to the positive input terminal B1, and is grounded in sequence through the positive input terminal B1, the sixth resistor R6 and the seventh resistor R7. The sixth resistor R6 and the seventh resistor R7 cooperate to divide the voltage of the positive electrode of the energy storage component 2 to obtain the voltage division of the energy storage component 2, and use the voltage division as an output to the detection result main control circuit 40, so that the main control circuit 40 obtains the voltage size of the energy storage component 2 according to the detection result.

The second capacitor C2 and the seventh resistor R7 are designed to be connected in parallel to absorb the voltage fluctuations that may occur in the voltage of the energy storage component 2 and its voltage division, thereby buffering the voltage division and protecting the electronic devices.

Please refer to FIG. 7 , which is a schematic diagram of a module structure of another implementation of a power supply circuit provided in an embodiment of the present application.

As shown in Figure 7, in some embodiments, the power supply circuit 1 provided in the embodiment of the present application also includes at least one trigger module, wherein the trigger module specifically includes a first trigger module, a second trigger module, a third trigger module and a fourth trigger module electrically connected to the main control circuit 40, the first trigger module, the second trigger module, the third trigger module and the fourth trigger module can be triggered by manual operation, and the main control circuit 40 can be used to detect whether each trigger module is triggered. When any trigger module is triggered, the main control circuit 40 controls the power supply circuit 1 to perform the function corresponding to the trigger module.

The first trigger module, the second trigger module, the third trigger module and the fourth trigger module are, for example, buttons.

In some embodiments, the main control circuit is used to control the power supply switch circuit 20 to conduct the power supply path between the energy storage component 2 and the load 3 in response to a first start signal; and/or, the main control circuit is provided with a first trigger module, and the main control circuit is used to control the power supply switch circuit 20 to conduct the power supply path between the energy storage component 2 and the load 3 when the first trigger module is triggered by external operation.

Specifically, the user can operate to trigger the first trigger module or manually input the first start signal to the main control circuit to enable the main control circuit 40 to turn on the power supply path between the energy storage component 2 and the load 3, so as to realize the function of manually starting the energy storage component 2 to provide emergency power supply to the load 3.

In some embodiments, the main control circuit is used to control the power switch circuit 20 to conduct the power supply path between the energy storage component 2 and the load 3 in response to the first shutdown signal; and/or,

The main control circuit is provided with a second trigger module, and the main control circuit is used to control the power supply switch circuit 20 to cut off the power supply path between the energy storage component 2 and the load 3 when the second trigger module is triggered by external operation.

Specifically, when the power switch circuit 20 is turned on, the user can operate to trigger the second trigger module or manually input the first shutdown signal to the main control circuit to make the main control circuit 40 shut off the power supply path between the energy storage component 2 and the load 3, so as to realize the function of manually shutting off the emergency power supply of the energy storage component 2 to the load 3. In this way, the user can conveniently interrupt the power supply process of the power supply circuit 1 to the energy storage component 2, further improving the working safety of the power supply circuit 1.

It should be understood that the first trigger module and the second trigger module can be the same trigger module, for example, the same button.

In some embodiments, the main control circuit is used to control the air pump switch circuit 30 to conduct the power supply path between the energy storage component 2 and the air pump body 4 in response to the second start signal; and/or,

The main control circuit is provided with a third trigger module, and the main control circuit is used to control the air pump switch circuit 30 to conduct the power supply path between the energy storage component 2 and the air pump body 4 when the third trigger module is triggered by external operation.

Specifically, the user can operate to trigger the third trigger module or manually input the second start signal to the main control circuit to enable the main control circuit 40 to open the power supply path between the energy storage component 2 and the air pump body 4, so as to realize the function of manually starting the energy storage component 2 to supply power to the air pump body 4.

In some embodiments, the main control circuit is used to control the air pump switch circuit 30 to disconnect the power supply path between the energy storage component 2 and the air pump body 4 in response to the second shutdown signal; and/or,

The main control circuit is provided with a fourth trigger module, and the main control circuit is used to control the air pump switch circuit 30 to disconnect the power supply path between the energy storage component 2 and the air pump body 4 when the fourth trigger module is triggered by external operation.

Specifically, when the air pump switch circuit 30 is turned on, the user can operate to trigger the fourth trigger module or manually input the second shutdown signal to the main control circuit to make the main control circuit 40 shut off the power supply path between the energy storage component 2 and the air pump body 4, so as to realize the function of manually shutting off the power supply from the energy storage component 2 to the air pump body 4. In this way, the user can conveniently interrupt the power supply process from the power supply circuit 1 to the air pump body 4, further improving the working safety of the power supply circuit 1.

It should be understood that the third trigger module and the fourth trigger module can be the same trigger module, for example, the same button.

In some embodiments, the main control circuit is further configured to control the power switch circuit 20 to cut off the power supply path between the energy storage component 2 and the load 3 after the power switch circuit 20 is turned on for a second preset time period.

Specifically, when the main control circuit 40 outputs the third signal to the power switch circuit 20, the power switch circuit 20 controls the first switch to switch to the off state to disconnect the power supply circuit between the energy storage component 2, the power switch circuit 20, the load interface circuit 10 and the load 3.

It should be understood that when the car battery is low on power, the load 3 needs power support from the energy storage component 2 for ignition, and the connection between the energy storage component 2 and the load 3 can be disconnected after the load 3 completes ignition. Therefore, the main control circuit 40 is also used to output a third signal to the power supply switch circuit 20 after the power supply switch circuit 20 is turned on for a second preset time, so that the power supply switch circuit 20 automatically cuts off the conductive path between the energy storage component 2 and the load interface circuit 10, so as to save power of the energy storage component 2 and improve the power supply safety of the energy storage component 2, and no manual operation by the user is required.

As shown in Figure 7, in some embodiments, the power supply circuit 1 also includes an alarm circuit 70, which is connected to the main control circuit. The main control circuit is also used to control the alarm circuit 70 to output an alarm signal when it is detected that the energy storage component 2 is not correctly connected to the power supply switch circuit 20, or the voltage of the energy storage component 2 connected to the power supply switch circuit 20 does not exceed the preset voltage threshold, or the load 3 is reversely connected to the load interface circuit 10.

It should be noted that the preset voltage threshold may be a first preset voltage threshold or a second preset voltage threshold.

It should also be noted that when the energy storage component 2 is correctly connected to the power supply switch circuit 20, the positive pole of the energy storage component 2 is connected to the positive input terminal B1, and the negative pole of the energy storage component 2 is connected to the negative input terminal B2; conversely, if the positive pole of the energy storage component 2 is connected to the negative input terminal B2, and the negative pole of the energy storage component 2 is connected to the positive input terminal B1, the energy storage component 2 is in a reverse connection state and is not correctly connected.

It should be understood that when the energy storage component 2 is not correctly connected to the power supply switch circuit 20, or the voltage of the energy storage component 2 connected to the power supply switch circuit 20 does not exceed the preset voltage threshold, the main control circuit 40 detects through the first detection circuit 50 that the voltage of the energy storage component 2 is less than or equal to the preset voltage threshold, and then controls the alarm circuit 70 to output an alarm signal to inform the user that the energy storage component 2 connected to the power supply switch circuit 20 is in an abnormal state, and remind the user to replace the energy storage component 2 in time, reconnect the energy storage component 2 correctly, or charge the energy storage component 2.

As shown in FIG. 2 and FIG. 7 , in some embodiments, the air pump body 4 is integrated into the power supply circuit 1 ;

When the air pump switch circuit 30 turns on the power supply path between the energy storage component 2 and the air pump body 4 , the air pump body 4 works under the power supply of the energy storage component 2 .

Please refer to FIG. 8 , which is a schematic diagram of the circuit structure of an air pump switch circuit in an implementation manner of a power supply circuit provided in an embodiment of the present application.

As shown in FIG8 , in some embodiments, the air pump switch circuit 30 includes a switch tube Q1, one end of the air pump body 4 is connected to the first end of the switch tube Q1, the other end of the air pump body 4 is used to connect to the energy storage component 2, the second end of the switch tube Q1 is grounded, and the controlled end of the switch tube Q1 is connected to the main control circuit;

When the controlled end of the switch tube Q1 receives the second signal, the energy storage component 2, the air pump body 4 and the switch tube Q1 form a power supply path.

Specifically, the switch tube Q1 has a first end, a second end and a controlled end, and the switch tube Q1 has a switchable on state and an off state, and the main control circuit 40 can control the switch tube Q1 to switch the on state or the off state by outputting a control signal to the controlled end of the switch tube Q1.

Among them, when the energy storage component 2 and the air pump body 4 are correctly connected to the power supply circuit 1, one end of the air pump body 4 is connected to the first end of the switch tube Q1, and the other end of the air pump body 4 is used to connect to the energy storage component 2, the second end of the switch tube Q1 is grounded, and the controlled end of the switch tube Q1 is connected to the main control circuit 40.

Illustratively, when the controlled end of the switch tube Q1 receives the third signal, the switch tube Q1 switches to the on state, and the energy storage component 2, the air pump body 4 and the switch tube Q1 form a power supply path; when the controlled end of the switch tube Q1 receives the fourth signal, the switch tube Q1 switches to the off state, and the power supply path formed by the energy storage component 2, the air pump body 4 and the switch tube Q1 is disconnected.

Exemplarily, the switch tube Q1 is one of an N-channel MOS tube, a P-channel MOS tube, a PNP-type transistor and an NPN-type transistor.

In some embodiments, the air pump switch circuit 30 also includes an eighth resistor R8 and a ninth resistor R9, wherein one end of the eighth resistor R8 is connected to the controlled end of the switch tube Q1, and the other end is grounded, and the ninth resistor R9 is connected between the main control circuit 40 and the controlled end of the switch tube Q1, and the eighth resistor R8 and the ninth resistor R9 are used to protect the switch tube Q1.

In some embodiments, the power supply circuit 1 further includes a conversion circuit 80;

The conversion circuit 80 is used to connect the energy storage component 2 and the main control circuit, convert the power supply voltage output by the energy storage component 2 into a working voltage, and output the working voltage to the main control circuit.

Specifically, the power supply voltage output by the energy storage component 2 is greater than the working voltage corresponding to the main control circuit 40. Exemplarily, the power supply voltage output by the energy storage component 2 is greater than 5V, while the working voltage corresponding to the main control circuit 40 is 5V.

Therefore, the power supply voltage output by the energy storage component 2 cannot be directly supplied to the main control circuit 40 to make the main control circuit 40 work, and may also cause overvoltage damage to the main control circuit 40. Based on this, a conversion circuit 80 is provided to connect the energy storage component 2 and the main control circuit 40 to convert the power supply voltage output by the energy storage component 2 into a working voltage, and then output the working voltage to the main control circuit 40, so that the main control circuit 40 can work normally and protect the main control circuit 40.

Please refer to FIG. 9 , which is a module diagram of an implementation scheme of an emergency device 6 provided in an embodiment of the present application.

As shown in Figure 9, the present application also provides an emergency device 6, which includes a shell 5, an energy storage component 2 and any power supply circuit 1 provided in the application embodiment, and at least part of the structure of the energy storage component 2 and the power supply circuit 1 is arranged in the shell 5.

Exemplarily, the emergency equipment 6 includes a vehicle emergency starting power supply and/or a battery clamp.

Specifically, in the emergency device 6, the energy storage component 2 is connected to the power supply circuit 1 or is directly arranged in the power supply circuit 1. The power supply circuit 1 is used to connect to the load 3 outside the emergency device 6 so that the energy storage component 2 can provide emergency power to the load 3 through the power supply circuit 1. Exemplarily, the load 3 includes at least one of a starter and a vehicle battery.

The power supply circuit 1 is also used to connect to the air pump body 4, so that the energy storage component 2 provides power support to the air pump body 4 through the power supply circuit 1, so that the air pump body 4 can inflate the vehicle tires.

Please refer to FIG. 10 , which is a module diagram of another implementation of the emergency device 6 provided in an embodiment of the present application.

As shown in Fig. 10, the emergency device 6 also includes an air pump body 4, that is, the air pump body 4 is arranged inside the emergency device 6, and the energy storage component 2 provides power supply support for the air pump body 4 through the power supply circuit 1. The emergency device 6 is also used to inflate the tires of the vehicle.

It should be understood that the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise. The terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be internal communication between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

It should also be understood that the term "and/or" used in the specification of this application and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, including these combinations. It should be noted that, in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "including a..." does not exclude the presence of other identical elements in the process, method, article or system including the element.

The serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above description is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto, and any easily conceivable equivalent modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims (17)

A power supply circuit, comprising: A load interface circuit, used for connecting a load; A power supply switch circuit, used to connect the energy storage component and the load interface circuit; An air pump switch circuit, the air pump switch circuit being arranged in a power supply path formed by the energy storage component and the air pump body; A main control circuit connected to the power supply switch circuit and the air pump body; The main control circuit is used to control the power supply switch circuit to turn on or off the power supply path between the energy storage component and the load, and is also used to control the air pump switch circuit to turn on or off the power supply path between the energy storage component and the air pump body; Wherein, the load includes at least one of a starter and a vehicle battery. The power supply circuit according to claim 1, wherein the main control circuit is used to control the power supply switch circuit to disconnect the power supply path between the energy storage component and the load under the condition that it is detected that the load is reversely connected to the load interface circuit. The power supply circuit according to claim 2, wherein the power supply circuit comprises a first detection circuit, the first detection circuit is connected to the load interface circuit and the main control circuit, and is used to detect the strength of the electrical signal at the load interface circuit and output the detection result to the main control circuit; The main control circuit is used to determine that the load is reversely connected to the load interface circuit under the condition that the strength of the electrical signal at the load interface circuit does not exceed a first strength threshold. The power supply circuit according to claim 3, wherein the first detection circuit comprises an optical coupler, one end of the light source of the optical coupler is connected to the positive output end of the load interface circuit, and the other end is grounded, one end of the light receiver of the optical coupler is connected to the main control circuit and a preset voltage-stabilized power supply, and the other end is grounded, wherein the light source is used to emit an optical signal to the light receiver under the condition that the positive output end of the load interface circuit is connected to the negative electrode of the load, so as to turn on the light receiver; Or, the first detection circuit includes a comparator, an input end of the comparator is connected to the load interface circuit, and an output end of the comparator is connected to the main control circuit; Or, the first detection circuit includes a transistor, a first end of the transistor is connected to the positive output end of the load interface circuit, a second end of the transistor is connected to the negative output end of the load interface circuit, and a third end of the transistor is connected to the main control circuit. The power supply circuit according to claim 1, wherein the main control circuit is used to control the power supply switch circuit to conduct the power supply path between the energy storage component and the load under the condition that it is detected that the load performs a preset operation. The power supply circuit according to claim 5, wherein the main control circuit is used to determine that the load performs a preset operation when it is detected that the decrease amplitude of the electrical signal strength at the load interface circuit exceeds a preset amplitude threshold within a first preset time period. The power supply circuit according to claim 1, wherein the main control circuit is further configured to not control the power supply switch circuit to conduct the power supply path between the energy storage component and the load when the voltage of the energy storage component does not exceed a first preset voltage threshold; and/or, The main control circuit is also used to control the power supply switch circuit to conduct the power supply path between the energy storage component and the load when the voltage of the energy storage component exceeds a first preset voltage threshold. The power supply circuit according to claim 1, wherein the main control circuit is further used for not controlling the air pump switch circuit to conduct the power supply path between the energy storage component and the air pump body when the voltage of the energy storage component does not exceed the second preset voltage threshold; and/or, The main control circuit is also used to allow the air pump switch circuit to be controlled to conduct the power supply path between the energy storage component and the air pump when the voltage of the energy storage component exceeds a second preset voltage threshold. The power supply circuit according to claim 7 or 8, wherein the power supply circuit further comprises a second detection circuit, and the second detection circuit is used to connect the energy storage component and the main control circuit to detect the voltage of the energy storage component and output the detection result to the main control circuit. The power supply circuit according to any one of claims 1 to 8, wherein the main control circuit is used to control the power supply switch circuit to conduct the power supply path between the energy storage component and the load in response to the first start signal; and/or The main control circuit is provided with a first trigger module, and the main control circuit is used to control the power supply switch circuit to conduct the power supply path between the energy storage component and the load when the first trigger module is triggered by external operation; and/or, The main control circuit is used to control the power switch circuit to conduct the power supply path between the energy storage component and the load in response to the first shutdown signal; and/or, The main control circuit is provided with a second trigger module, and the main control circuit is used to control the power supply switch circuit to cut off the power supply path between the energy storage component and the load when the second trigger module is triggered by external operation. The power supply circuit according to any one of claims 1 to 8, wherein the main control circuit is used to control the air pump switch circuit to conduct the power supply path between the energy storage component and the air pump body in response to the second start signal; and/or The main control circuit is provided with a third trigger module, and the main control circuit is used to control the air pump switch circuit to conduct the power supply path between the energy storage component and the air pump body when the third trigger module is triggered by external operation; and/or, The main control circuit is used to control the air pump switch circuit to disconnect the power supply path between the energy storage component and the air pump body in response to the second shutdown signal; and/or, The main control circuit is provided with a fourth trigger module, and the main control circuit is used to control the air pump switch circuit to disconnect the power supply path between the energy storage component and the air pump body when the fourth trigger module is triggered by external operation. The power supply circuit according to any one of claims 1 to 8, wherein the main control circuit is further used to control the power supply switch circuit to cut off the power supply path between the energy storage component and the load after the power supply switch circuit is turned on for a second preset time period. The power supply circuit according to any one of claims 1 to 8, wherein the power supply circuit further comprises an alarm circuit, the alarm circuit is connected to the main control circuit, and the main control circuit is further used to control the alarm circuit to output an alarm signal when it is detected that the energy storage component is not correctly connected to the power supply switch circuit, or that the voltage of the energy storage component connected to the power supply switch circuit does not exceed a preset voltage threshold, or that the load is reversely connected to the load interface circuit. The power supply circuit according to any one of claims 1 to 8, wherein the air pump body is integrated into the power supply circuit; When the air pump switch circuit switches on the power supply path between the energy storage component and the air pump body, the air pump body works under the power supply of the energy storage component. The power supply circuit according to claim 14, wherein the air pump switch circuit comprises a switch tube, one end of the air pump body is connected to the first end of the switch tube, the other end of the air pump body is used to connect to the energy storage component, the second end of the switch tube is grounded, and the controlled end of the switch tube is connected to the main control circuit; When the controlled end of the switch tube receives the second signal, the energy storage component, the air pump body and the switch tube form a power supply path. The power supply circuit according to any one of claims 1 to 8, wherein the power supply circuit further comprises a conversion circuit; The conversion circuit is used to connect the energy storage component and the main control circuit, convert the supply voltage output by the energy storage component into an operating voltage, and output the operating voltage to the main control circuit. An emergency device, wherein the emergency device comprises a shell, an energy storage component and a power supply circuit as described in any one of claims 1-16, and at least part of the structure of the energy storage component and the power supply circuit is arranged in the shell.