CN220979733U - Power supply circuit and emergency equipment - Google Patents

Abstract

The application provides a power supply circuit and emergency equipment, the power supply circuit includes: a load interface circuit for connecting a load; the power supply switch circuit is used for connecting the energy storage component and the load interface circuit; the air pump switch circuit is arranged in a power supply passage formed by the energy storage component and the air pump body; and a master control circuit. The main control circuit is used for disconnecting a power supply path between the energy storage component and the load when the load is detected to be reversely connected with the load interface circuit; the emergency power supply device is further used for conducting a power supply channel between the energy storage component and the air pump body when the condition of receiving the air pump triggering signal is met, so that the air pump body works, the load comprises at least one of a starter and a vehicle battery, whether the access of the load is abnormal or not is sensitively detected, emergency power supply to the load which is accessed abnormally is avoided, the power supply safety is improved, the same emergency equipment is used for realizing the functions of emergency ignition of an automobile and inflation of a tire, the two functions are controlled to work in a concentrated and flexible mode, and the size of the emergency equipment is reduced, so that the emergency equipment is convenient to carry.

Description

Power supply circuit and emergency equipment

Technical Field

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

Background

In the use of motor vehicles, when starting the vehicle engine, the battery is required to provide a starting current for ignition starting, but the battery cannot provide the starting current for the vehicle when the power is insufficient, and in addition, when the tire pressure of the vehicle is insufficient, the running of the vehicle can be greatly influenced. In order to ensure good running of the vehicle, the vehicle owners often need to stock a starting power supply or a battery clamp for emergency power supply of the storage battery and an air pump for inflating the tire.

However, when the starting power supply is reversely connected with the storage battery, the storage battery is easily damaged or ignited when the vehicle is started by igniting. On the other hand, carrying the starting power supply and the air pump at the same time also occupies a large space, and the process of inflating by using the air pump also needs power supply support.

Disclosure of Invention

The application mainly aims to provide a power supply circuit and emergency equipment, which aim to sensitively detect whether the access of a load is abnormal or not so as to avoid emergency power supply to the load which is accessed abnormally, improve the power supply safety, realize the functions of emergency ignition of an automobile and inflation of a tire in the same emergency equipment, intensively and flexibly control the work of the two functions, reduce the volume of the emergency equipment and ensure that a product is convenient to carry.

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

The load interface circuit is used for connecting a load;

the power supply switch circuit is used for connecting the energy storage component and the load interface circuit;

the air pump switch circuit is arranged in a power supply passage formed by the energy storage component and the air pump body;

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

The main control circuit is used for outputting a first signal to the power supply switch circuit under the condition that the load is detected to be reversely connected with the load interface circuit, so that a power supply path between the energy storage component and the load is disconnected;

the main control circuit is also used for outputting a second signal to the air pump body under the condition of receiving the air pump trigger signal so as to conduct a power supply channel between the energy storage component and the air pump body and enable the air pump body to work;

Wherein 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, where the emergency device includes a housing, an energy storage component, and any one of the power supply circuits provided in the embodiments of the present application, and at least a part of structures of the energy storage component and the power supply circuit are disposed in the housing.

In summary, the present application provides a power supply circuit and an emergency device, the power supply circuit includes: the load interface circuit is used for connecting a load; the power supply switch circuit is used for connecting the energy storage component and the load interface circuit; the air pump switch circuit is arranged in a power supply passage formed by the energy storage component and the air pump body; the main control circuit is connected with the power supply switch circuit and the air pump body; the main control circuit is used for outputting a first signal to the power supply switch circuit under the condition that the load is detected to be reversely connected with the load interface circuit, so that a power supply path between the energy storage component and the load is disconnected; the main control circuit is also used for outputting a second signal to the air pump body under the condition of receiving the air pump trigger signal so as to conduct a power supply channel between the energy storage component and the air pump body and enable the air pump body to work; wherein the load comprises at least one of a starter or a vehicle battery. The power supply circuit and the emergency equipment provided by the embodiment of the application can sensitively detect whether the access of the load is abnormal or not so as to avoid emergency power supply to the load which is accessed abnormally, so that the power supply safety is improved, the functions of emergency ignition of an automobile and inflation of a tire can be realized in the same emergency equipment, the two functions are controlled to work flexibly, the size of the emergency equipment is reduced, and the product is convenient to carry.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic block diagram of an embodiment of a power supply circuit according to an embodiment of the present application;

Fig. 2 is a schematic block diagram of another implementation of a power supply circuit according to an embodiment of the present application;

fig. 3 is a schematic circuit diagram of a power supply circuit according to an embodiment of the present application;

Fig. 4 is a schematic circuit diagram of a first detection circuit in a power supply circuit according to an embodiment of the present application;

fig. 5 is a schematic circuit diagram of a second detection circuit in the power supply circuit according to an embodiment of the present application;

Fig. 6 is a schematic circuit diagram of an air pump switch circuit in an embodiment of a power supply circuit according to an embodiment of the present application;

FIG. 7 is a schematic block diagram of an embodiment of an emergency device according to an embodiment of the present application;

Fig. 8 is a schematic block diagram of another implementation of an emergency device according to an embodiment of the present application.

Reference numerals illustrate:

1. A power supply circuit; 2. an energy storage assembly; 3. a load; 4. an air pump body; 5. a housing; 6. an emergency device; 10. a load interface circuit; 20. a power supply switching circuit; 30. an air pump switching circuit; 40. a main control circuit; 50. a first detection circuit; 60. a second detection circuit; 70. an alarm circuit; 80. a conversion circuit; b1, a positive input end; b2, a negative input end; p1, positive output end; p2, negative output end; k1, a third switch; q1, a switching tube; r1, a first resistor; r2, a second resistor; r3, a third resistor; r4, a fourth resistor; r5, a fifth resistor; r6, a sixth resistor; r7, a seventh resistor; c1, a first capacitor; c2, a second capacitor; v1, a stabilized voltage power supply; d1, a luminous source; d2, a light receiver.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.

Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1, fig. 1 is a schematic block diagram of an embodiment of a power supply circuit according to the present application.

As shown in fig. 1, the power supply circuit 1 at least comprises the following circuit components: the load interface circuit 10, the power supply switch circuit 20, the air pump switch circuit 30, and the main control circuit 40 are specifically described below.

Specifically, the load interface circuit 10 is used for connecting the load 3, the power supply switch circuit 20 is used for connecting the energy storage component 2 and the load interface circuit 10, and the air pump switch circuit 30 is arranged in a 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 supply 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.

Wherein the load 3 comprises at least one of a starter and a vehicle battery.

The air pump body 4 is used for performing an air pumping operation under the condition of power supply input, for example, pumping the tire of a vehicle.

Specifically, the main control circuit 40 is connected to the power supply switch circuit 20 and the air pump switch circuit 30, and the main control circuit 40 is firstly configured to output a first signal to the power supply switch circuit 20 to disconnect a power supply path between the energy storage component 2 and the load 3 when detecting that the load 3 is connected to the load interface circuit 10; the main control circuit 40 is further configured to output a second signal to the air pump body 4 to conduct a power supply path between the energy storage component 2 and the air pump body 4 under the condition of receiving the air pump trigger signal, so that the air pump body 4 works.

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

Further, when the load 3 is connected to the load interface circuit 10, even if the user instructs the main control circuit 40 to control the power supply switch circuit 20 to be turned on, the main control circuit 40 maintains the output of the first signal to the power supply switch circuit 20, so that the power supply switch circuit 20 is kept in the off state, thereby improving the power supply safety.

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

It should be noted that, the air pump switch circuit 30 also has a switchable on state and an off state, and under the condition that the main control circuit 40 outputs the second signal to the air pump switch circuit 30, the air pump switch circuit 30 is switched to the on state in response to the second signal, so that the energy storage component 2, the air pump body 4 and the air pump switch circuit 30 form the on 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 air pumping operation. On the other hand, when the air pump switch circuit 30 is switched to the off state, the energy storage assembly 2 cannot supply power to the air pump body 4.

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

According to the power supply circuit 1 provided by the embodiment of the application, when the load 3 is detected to be reversely connected with the load interface circuit 10, the power supply channel between the energy storage component 2 and the load 3 is controlled to be disconnected, so that whether the load 3 is connected abnormally or not can be sensitively detected, emergency power supply to the abnormally connected load 3 is avoided, the power supply safety is improved, the functions of emergency ignition and tire inflation of an automobile can be realized through one power supply circuit 1, the two functions are controlled to work flexibly, the size of the emergency equipment 6 is reduced, and the product is convenient to carry.

Referring to fig. 2, fig. 2 is a schematic block diagram of another embodiment of a power supply circuit according to an embodiment of the application.

As shown in fig. 2, in some embodiments, the power supply circuit 1 further comprises an energy storage assembly 2, the energy storage assembly 2 being connected to the power supply switching circuit 20, i.e. the energy storage assembly 2 is an integral part 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 assembly 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 two embodiments described above may be implemented in combination, that is, the energy storage assembly 2 and the air pump body 4 are simultaneously provided in the power supply circuit 1.

In some embodiments, the master circuit 40 is further configured to output a first signal to the power supply switching circuit 20 to disconnect 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.

Specifically, the main control circuit 40 obtains the voltage of the energy storage component 2, and if the voltage of the energy storage component 2 does not exceed the first preset voltage threshold, the main control circuit 40 outputs a first signal to the power supply switch circuit 20, so that the power supply switch circuit 20 is switched to an off state, and the power supply path between the energy storage component 2 and the load 3 is disconnected.

In some embodiments, the main control circuit 40 is further configured to not output the second signal to the air pump switch circuit 30 when the voltage of the energy storage component 2 does not exceed the second preset voltage threshold.

Specifically, the main control circuit 40 obtains the voltage of the energy storage component 2, and when the voltage of the energy storage component 2 does not exceed the second preset voltage threshold, even if the main control circuit 40 receives the air pump trigger signal, the main control circuit 40 does not output the second signal to the air pump switch circuit 30, so that the air pump switch circuit 30 is kept turned off.

The two embodiments described above may be implemented individually or in combination. It should be understood that the first preset voltage threshold and the second preset voltage threshold may be set to the same value, or may be set to different values, which are not particularly limited herein.

It should be understood that the voltage of the energy storage component 2 does not exceed the first preset voltage threshold/the second preset voltage threshold, which may be an abnormal state such as insufficient electric quantity of the energy storage component 2, the energy storage component 2 is not correctly connected to the power supply circuit 1, or the positive and negative poles of the energy storage component 2 are shorted, where the master control circuit 40 outputs a first signal to the power supply switch circuit 20 to control the power supply switch circuit 20 to keep turned off; the second signal is not output to the air pump switch circuit 30 to control the air pump switch circuit 30 to be kept off, so that the power supply switch circuit 20 and/or the air pump switch circuit 30 are prevented from being turned on in an invalid manner, and at least one of the energy storage component 2, the power supply circuit 1 and the load 3 is prevented from being damaged due to an abnormal state of the energy storage component 2.

Further, 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 70 to output an alarm signal, so as to inform the user that the electric quantity of the energy storage component 2 is insufficient, remind the user to replace the energy storage component 2 in time, connect the energy storage component 2 again correctly or charge the energy storage component 2, and play a role in protecting the energy storage component 2, the power supply circuit 1 and the load 3.

In some embodiments, the main control circuit 40 is further configured to output a third signal to the power supply switch circuit 20 to conduct a power supply path between the energy storage component 2 and the load 3 when the voltage of the energy storage component 2 exceeds the first preset voltage threshold, and it is detected that the load 3 is correctly connected to the load interface circuit 10, and the power supply trigger signal is received.

It should be understood that when the voltage of the energy storage component 2 exceeds the first preset voltage threshold, the energy storage voltage is sufficiently charged, and the power supply trigger signal is specifically a trigger signal output by the user operation to the main control circuit 40, so as to instruct the main control circuit 40 to control the power supply switch circuit 20 to be turned on. And under the condition that the voltage of the energy storage component 2 exceeds a first preset voltage threshold value and the load 3 is detected to be correctly connected to the load interface circuit 10, the main control circuit 40 is allowed to respond to the power supply trigger signal to output a third signal to the power supply switch circuit 20 so as to control the power supply switch circuit 20 to be conducted.

In some embodiments, the master circuit 40 is further configured to allow the output of the first signal to the air pump switch circuit 30 when the voltage of the energy storage assembly 2 exceeds the second preset voltage threshold.

Similarly, when the voltage of the energy storage component 2 exceeds the second preset voltage threshold, the energy storage voltage is characterized by sufficient electric quantity, so that the main control circuit 40 is allowed to output a second signal to the air pump switch circuit 30 to control the air pump switch circuit 30 to be turned on when receiving the air pump trigger signal.

Referring to fig. 3 and 4, fig. 3 is a schematic circuit diagram of a power supply circuit according to an embodiment of the present application, and fig. 4 is a schematic circuit diagram of a first detection circuit in the power supply circuit according to an embodiment of the present application.

As shown in fig. 2, 3 and 4, in some embodiments, the power supply circuit 1 further includes a first detection circuit 50, where the first detection circuit 50 is connected to the energy storage component 2 and the main control circuit 40, and is configured to detect a voltage of the energy storage component 2, and output a detection result to the main control circuit 40, so that the main control circuit 40 obtains the voltage of the energy storage component 2 according to the detection result.

Specifically, the power supply switch circuit 20 is provided with a positive input end B1 and a negative input end B2, and the positive input end B1 and the negative input end B2 are used for being connected with the positive electrode and the negative electrode of the energy storage component 2 one by one, wherein when the energy storage component 2 is correctly connected into the power supply switch circuit 20, the positive electrode of the energy storage component 2 is connected with the positive input end B1, and the negative electrode of the energy storage component 2 is connected with the negative input end B2.

Accordingly, the first detection circuit 50 is specifically configured to detect the voltage of the positive input terminal B1, so as to obtain the voltage of the energy storage component 2.

Specifically, the first detection circuit 50 includes a first resistor R1, a second resistor R2, and a first capacitor C1, where a first end of the first resistor R1 is connected to the positive input end B1, a second end of the first resistor R1 is connected to a first end of the second resistor R2, a second end of the second resistor R2 is grounded, and the master control circuit 40 is connected to the second end of the first resistor R1 and the first end of the second resistor R2; and the first end of the first capacitor C1 is connected to the first end of the second resistor R2, and the second end of the first capacitor C1 is connected to the second end of the second resistor R2.

The operation principle of the first detection circuit 50 will be described: 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 sequentially connected to the ground through the positive input terminal B1, the first resistor R1 and the second resistor R2 cooperate to perform voltage division processing on the voltage of the positive electrode of the energy storage component 2 to obtain a voltage division of the energy storage component 2, and the voltage division is used as an output to the detection result master control circuit 40, so that the master control circuit 40 obtains the voltage of the energy storage component 2 according to the detection result.

The first capacitor C1 and the second resistor R2 are designed in parallel, so as to absorb voltage fluctuation possibly occurring in the voltage and the partial voltage of the energy storage component 2, buffer the voltage partial voltage and protect electronic devices.

Referring to fig. 5, fig. 5 is a schematic circuit diagram of a second detection circuit in a power supply circuit according to an embodiment of the application.

In some embodiments, the power supply circuit 1 further includes a second detection circuit 60, where the second detection circuit 60 is connected to the load interface circuit 10 and the master circuit 40, and is configured to detect a second electrical signal at the load interface circuit 10 and output a detection result to the master circuit 40;

the master circuit 40 is configured to determine that the load 3 is connected to the load interface circuit 10 in reverse if the second electrical signal does not exceed the second intensity threshold.

The second electrical signal strength may be, for example, a voltage strength or a current strength at a connection of the load 3 and the load interface circuit 10, and the detection result may be a specific electrical signal value or a high-low level.

Preferably, the second electrical signal strength is the voltage strength at the connection of the load 3 with the load interface circuit 10.

In some embodiments, the second electrical signal strength comprises a voltage value at the load interface circuit 10.

Specifically, the load interface circuit 10 is provided with a positive output end P1 and a negative output end P2, which are used for being connected with the positive electrode and the negative electrode of the load 3 one by one, wherein when the load 3 is correctly connected to the load interface circuit 10, the positive electrode of the load 3 is connected with the positive output end P1, and the negative electrode of the load 3 is connected with the negative output end P2.

Accordingly, the second detection circuit 60 is specifically configured to detect the voltage level of the positive output terminal P1 as the second electrical signal strength. Therefore, the control circuit can sensitively detect whether the access of the load 3 is abnormal or not so as to avoid emergency power supply to the load 3 which is accessed abnormally, and the power supply safety is improved.

As shown in fig. 5, in some embodiments, the second detection circuit 60 includes an optocoupler, which includes a light emitting source D1 for outputting an optical signal under the driving of an input voltage, and a light receiver D2 having an on state and an off state, wherein the light receiver D2 is switched to the on state under the condition of the optical signal input.

Specifically, one end of the light emitting source D1 is connected to the positive output end P1 of the load interface circuit 10, the other end of the light emitting source D1 is grounded, one end of the light receiver D2 of the optocoupler is connected to the main control circuit 40 and the preset regulated power supply V1, and the other end of the light receiving source D2 is grounded, where the light emitting source D1 is configured to emit an optical signal to the light receiver D2 under the condition that the positive output end P1 of the load interface circuit 10 is connected to the negative electrode of the load 3, so that the light receiver D2 is turned on.

Specifically, the anode of the light emitting source D1 is grounded, the cathode of the light emitting source D1 is connected to the positive output terminal P1 of the load interface circuit 10, and when the anode voltage of the light emitting source D1 exceeds the cathode voltage by a preset difference, the light emitting source D1 emits an optical signal to the light receiver D2, so that the light receiver D2 is turned on.

Further, the second detection circuit 60 further includes a third resistor R3, a fourth resistor R4, and a seventh resistor R7, wherein a first end of the third resistor R3 is connected to the positive output end P1 of the load interface circuit 10, a second end of the third resistor R3 is connected to the light emitting source D1 of the optocoupler, a first end of the fourth resistor R4 is connected to the second end of the third resistor R3, a second end of the fourth resistor R4 is grounded, a first end of the seventh resistor R7 is connected to the regulated power supply V1, and a second end of the seventh resistor R7 is connected to the light receiver D2 of the optocoupler and the master control circuit 40.

The operation principle of the second detection circuit 60 will be described: when the load 3 is reversely connected with the load interface circuit 10, the negative electrode of the load 3 is connected with the positive output end P1 of the load interface circuit 10, the cathode voltage of the light emitting source D1 is smaller than 0, the anode voltage of the light emitting source D1 exceeds the cathode voltage by a preset difference value, an optical signal is emitted to the light receiver D2 so as to enable the light receiver D2 to be conducted, the main control circuit 40 detects that the voltage at the connection part of the main control circuit 40 and the light receiver D2 is pulled down, and the load 3 is reversely connected with the load interface circuit 10.

Conversely, when the load 3 is correctly connected to the load interface circuit 10, the positive electrode 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, the anode voltage of the light emitting source D1 is smaller than the cathode voltage, the light emitting source D1 does not emit a light signal, the light receiver D2 is kept in an off state, and the main control circuit 40 detects that the voltage at the junction of the main control circuit 40 and the light receiver 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 emitting source D1 does not emit the light signal, the light receiver D2 remains in the off state, and the main control circuit 40 detects that the voltage at the junction of the main control circuit 40 and the light receiver D2 is stable.

Therefore, when the main control circuit 40 detects that the voltage at the connection position of the main control circuit 40 and the light receiver 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 the voltage at the connection position of the main control circuit 40 and the light receiver D2 is detected to be pulled down, it is determined that the load 3 is reversely connected with the load interface circuit 10, so that whether the connection of the load 3 is abnormal or not is sensitively detected to avoid emergency power supply to the load 3 which is abnormally connected, and the power supply safety is improved.

In other embodiments, the second detection circuit 60 includes a comparator, an input terminal of the comparator is connected to the load interface circuit 10, and an output terminal of the comparator is connected to the master circuit 40.

Specifically, the comparator has a positive input end, a negative input end and an output end, wherein the comparator is used for comparing the signal intensity of the signal input to the positive input end of the comparator with the signal input to the negative input end of the comparator, and outputting a signal matched with the comparison result from the output end of the comparator as a detection result.

Illustratively, the positive input of the comparator is connected to the positive output P1 of the load interface circuit 10 to obtain the second electrical signal, and the negative input 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 electrode of the load 3 is connected to the positive output terminal P1 of the load interface circuit 10, the negative electrode of the load 3 is connected to the negative output terminal P2 of the load interface circuit 10, the signal intensity at the positive input terminal of the comparator is greater than the signal intensity at the negative input terminal of the comparator, and the comparator outputs a corresponding high-level signal from the output terminal, so that the master control circuit 40 determines that the load 3 is correctly connected to the load interface circuit 10.

Conversely, when the load 3 is reversely connected to the load interface circuit 10, the positive electrode of the load 3 is connected to the negative output terminal P2 of the load interface circuit 10, the negative electrode of the load 3 is connected to the positive output terminal P1 of the load interface circuit 10, the signal intensity at the positive input terminal of the comparator is smaller than the signal intensity 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 still other embodiments, the second detection circuit 60 includes a transistor, a first terminal of the transistor is connected to the positive output terminal P1 of the load interface circuit 10 to obtain the second electrical signal, a second terminal of the transistor is connected to the negative output terminal P2 of the load interface circuit 10, and a third terminal of the transistor is connected to the master control circuit 40.

Specifically, if the signal strength of the third terminal of the triode is matched to the signal strength difference between the first terminal and the second terminal, the master control circuit 40 may detect the signal of the third terminal of the triode to determine whether the second electric signal exceeds the second strength threshold and whether the load 3 is reversely connected to the load interface circuit 10.

As shown in fig. 2, in some embodiments, the power supply circuit 1 further includes an alarm circuit 70, where the alarm circuit 70 is connected to the master control circuit 40, and the master control circuit 40 is further configured to control the alarm circuit 70 to output an alarm signal when it is detected that the energy storage component 2 is not properly connected to the power supply switch circuit 20, or that the voltage of the energy storage component 2 connected to the power supply switch circuit 20 does not exceed a preset voltage threshold, or that 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 be understood that, when the energy storage component 2 is not properly 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 that the voltage of the energy storage component 2 is less than or equal to the preset voltage threshold through the first detection circuit 50, and then the alarm circuit 70 is controlled 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, to connect the energy storage component 2 again correctly, or to charge the energy storage component 2.

On the other hand, when the load 3 is reversely connected with the load interface circuit 10, the main control circuit 40 detects that the voltage of the energy storage component 2 is less than or equal to the preset voltage threshold value through the second detection circuit 60, and also controls the alarm circuit 70 to output an alarm signal.

As shown in fig. 3, in some embodiments, the power supply switch circuit 20 includes a first switch disposed between the positive input terminal B1 and the positive output terminal P1, the first switch has a switchable on state and a switchable off state, and when the main control circuit 40 outputs a first signal to the power supply switch circuit 20, the power supply switch circuit 20 controls the first switch to be turned on, so that the energy storage component 2, the power supply switch circuit 20, the load interface circuit 10 and the load 3 form a power supply loop.

In some embodiments, the main control circuit 40 is provided with a first trigger module, and the main control circuit 40 is further configured to output a third signal to the power supply switch circuit 20 when the first trigger module is triggered by an external operation, so that the power supply switch circuit 20 conducts a power supply path between the energy storage component 2 and the load 3.

In some embodiments, the main control circuit 40 is provided with a second trigger module, and the main control circuit 40 is configured to generate the air pump trigger signal when the second trigger module is triggered by an external operation.

Specifically, the user may operate to trigger the first triggering module to enable the main control circuit 40 to output the third signal to the power supply switch circuit 20, so as to control the power supply switch circuit 20 to conduct the power supply path between the energy storage component 2 and the load 3; the user can also operate and trigger the second trigger module to enable the main control circuit 40 to generate an air pump trigger signal, and further output a second signal to the power supply switch circuit 20 according to the air pump trigger signal, so as to control the air pump switch circuit 30 to conduct the energy storage component 2, the air pump body 4 and a power supply path formed by the air pump switch circuit 30.

The first trigger module and the second trigger module may be two key modules disposed in the main control circuit 40, and when the main control circuit 40 detects that the key module is triggered by pressing, a corresponding first signal or an air pump trigger signal is output.

In some embodiments, when the power supply switch circuit 20 is turned on, the main control circuit 40 is further configured to output a first signal to the power supply switch circuit 20 under a condition that the first trigger module is triggered by an external operation.

In some embodiments, when the air pump body 4 is in operation, the main control circuit 40 is further configured to output a fourth signal to the air pump body 4 under the condition that the second trigger module is triggered by an external operation, so that the air pump body 4 stops operating.

Specifically, when the power supply switch circuit 20 is turned on, the user can trigger the first trigger module to realize the function of manually turning off the power supply switch circuit 20 through operation; when the air pump switch circuit 30 is turned on, the user can trigger the second trigger module to realize the function of manually turning off the air pump switch circuit 30. Therefore, a user can conveniently interrupt the power supply process of the power supply circuit 1 to the load 3 or the air pump body 4, and the work safety of the power supply circuit 1 is further improved.

As shown in fig. 2, in some embodiments, the power supply circuit 1 further includes a conversion circuit 80; the conversion circuit 80 is used for connecting the energy storage component 2 and the main control circuit 40, converting the power supply voltage output by the energy storage component 2 into a working voltage, and outputting the working voltage to the main control circuit 40.

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, and the power supply voltage output by the energy storage component 2 is greater than 5v, and 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 the main control circuit 40 may be damaged due to overvoltage. Based on this, a conversion circuit 80 is provided to connect the energy storage component 2 and the main control circuit 40, so as to convert the power supply voltage output by the energy storage component 2 into an operating voltage, and then output the operating voltage to the main control circuit 40, so that the main control circuit 40 operates normally and protects the main control circuit 40.

As shown in fig. 1 and 2, in some embodiments, the air pump switch circuit 30 includes a switch tube Q1, the switch tube Q1 is disposed in a power supply path formed by the energy storage assembly 2 and the air pump body 4, and a controlled end of the switch tube Q1 is connected with the main control circuit 40; when the controlled end of the switching tube Q1 receives the second signal, the energy storage component 2, the air pump body 4 and the switching tube Q1 form a power supply path.

Specifically, the switching tube Q1 has a switchable on state and an off state, and the master control circuit 40 can control the switching tube Q1 to switch the on state or the off state by outputting a control signal to the controlled end of the switching tube Q1. Illustratively, when the controlled end of the switching tube Q1 receives the second signal, the switching tube Q1 is switched to a conductive state, and the energy storage component 2, the air pump body 4 and the switching tube Q1 form a power supply path; when the controlled end of the switching tube Q1 receives the fourth signal, the switching tube Q1 is switched to the off state, and the power supply path formed by the energy storage assembly 2, the air pump body 4 and the switching tube Q1 is disconnected.

Referring to fig. 5, fig. 5 is a schematic circuit diagram of an air pump switch circuit 30 in an embodiment of a power supply circuit 1 according to the present application.

As shown in fig. 5, in some embodiments, when both 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 switching tube Q1, the other end of the air pump body 4 is used for being connected to the energy storage component 2, the second end of the switching tube Q1 is grounded, and the controlled end of the switching tube Q1 is connected to the main control circuit 40.

Specifically, the switching tube Q1 has a first end, a second end and a controlled end, and when the controlled end of the switching tube Q1 receives the second signal, the first end and the second end of the switching tube Q1 are mutually turned on, so that the energy storage component 2 supplies power to the air pump body 4 to support the air pump body 4 to perform the air pumping operation. Further, under the condition that the second trigger module is triggered by external operation, the main control circuit 40 outputs a fourth signal to the air pump switch circuit 30, the first end and the second end of the switch tube Q1 are turned off, so that the power supply path formed by the energy storage component 2, the air pump body 4 and the switch tube Q1 is disconnected.

The switching transistor Q1 is one of an N-channel MOS transistor, a P-channel MOS transistor, a PNP-type transistor, and an NPN-type transistor, for example. Taking the switch tube Q1 as an N-channel MOS tube as an example, the drain electrode of the N-channel MOS tube is connected to the air pump body 4, the source electrode of the N-channel MOS tube is grounded, and the gate electrode of the N-channel MOS tube is connected to the main control circuit 40 as the controlled end, the second signal is a high-level signal, and the fourth signal is a low-level signal.

In some embodiments, the air pump switch circuit 30 further includes a fifth resistor R5 and a sixth resistor R6, wherein one end of the fifth resistor R5 is connected to the controlled end of the switching tube Q1, the other end is grounded, and the sixth resistor R6 is connected between the main control circuit 40 and the controlled end of the switching tube Q1, and the fifth resistor R5 and the sixth resistor R6 are used for protecting the switching tube Q1.

In other embodiments, when the energy storage component 2 and the air pump body 4 are both correctly connected to the power supply circuit 1, one end of the switching tube Q1 is connected to the energy storage component 2, the other end of the switching tube Q1 is connected to the air pump body 4, and the controlled end of the switching tube Q1 is connected to the main control circuit 40.

Specifically, the main control circuit 40 inputs a second signal to the controlled end of the switching tube Q1 to control the switching tube Q1 to be switched to a conducting state, so that the energy storage component 2, the air pump body 4 and the switching tube Q1 form a power supply path; similarly, the master control circuit 40 inputs a fourth signal to the controlled end of the switching tube Q1 to control the switching tube Q1 to switch to an off state, so that the power supply path formed by the energy storage component 2, the air pump body 4 and the switching tube Q1 is turned off.

Referring to fig. 6, fig. 6 is a schematic block diagram of an embodiment of an emergency device 6 according to the present application.

As shown in fig. 6, the present application further provides an emergency device 6, where the emergency device 6 includes a housing 5, an energy storage component 2, and any one of the power supply circuits 1 provided in the embodiments of the present application, and at least part of the energy storage component 2 and the power supply circuit 1 are structurally disposed in the housing 5.

The emergency device 6 illustratively includes a vehicle emergency start power source and/or a battery clamp.

Specifically, in the emergency device 6, the energy storage assembly 2 is connected to the power supply circuit 1 or directly disposed in the power supply circuit 1, and the power supply circuit 1 is used to connect to the load 3 outside the emergency device 6, so that the energy storage assembly 2 performs emergency power supply to the load 3 through the power supply circuit 1, and the load 3 includes at least one of a starter and a vehicle battery, for example.

The power supply circuit 1 is further used for being connected with the air pump body 4, so that the energy storage component 2 provides power supply support for the air pump body 4 through the power supply circuit 1, and the air pump body 4 can pump the vehicle tire.

Referring to fig. 7, fig. 7 is a schematic block diagram of another embodiment of an emergency device 6 according to an embodiment of the present application.

As shown in fig. 7, the emergency device 6 further includes an air pump body 4, that is, the air pump body 4 is disposed inside the emergency device 6, and the energy storage assembly 2 provides power supply support for the air pump body 4 through the power supply circuit 1. The emergency device 6 is also used for inflating the vehicle tyre.

It is to be understood that the terminology used in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood by those skilled in the art in specific cases.

It should also be understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations. It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments. While the application has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the application is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and alternatives falling within the spirit and scope of the application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (13)

1. A power supply circuit, comprising:

The load interface circuit is used for connecting a load;

The power supply switch circuit is used for connecting the energy storage component with the load interface circuit;

The air pump switch circuit is arranged in a power supply passage formed by the energy storage component and the air pump body;

The main control circuit is connected with the power supply switch circuit and the air pump body;

The main control circuit is used for outputting a first signal to the power supply switch circuit under the condition that the load is detected to be reversely connected with the load interface circuit, so that a power supply path between the energy storage component and the load is disconnected;

The main control circuit is also used for outputting a second signal to the air pump body under the condition of receiving an air pump trigger signal so as to conduct a power supply passage between the energy storage component and the air pump body, so that the air pump body works;

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

2. The power supply circuit of claim 1, wherein the master circuit is further configured to output a first signal to the power switching circuit to disconnect a power supply path between the energy storage assembly and the load when the voltage of the energy storage assembly does not exceed a first preset voltage threshold;

And/or the number of the groups of groups,

The main control circuit is also used for not outputting a second signal to the air pump body when the voltage of the energy storage component does not exceed a second preset voltage threshold.

3. The power supply circuit of claim 2, further comprising a first detection circuit for connecting the energy storage component with the master control circuit to detect a voltage of the energy storage component and output a detection result to the master control circuit.

4. The power supply circuit of claim 1, wherein the master circuit is further configured to output a third signal to the power supply switching circuit to conduct a 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 load is detected to be properly connected to the load interface circuit, and a power supply trigger signal is received.

5. The power supply circuit according to claim 1, further comprising a second detection circuit connected to the load interface circuit and the main control circuit for detecting a second electrical signal at the load interface circuit and outputting a detection result to the main control circuit;

The main control circuit is used for determining that the load is reversely connected with the load interface circuit under the condition that the second electric signal does not exceed a second intensity threshold value.

6. The power supply circuit according to claim 5, wherein the second detection circuit comprises an optocoupler, one end of a light emitting source of the optocoupler is connected with the positive output end of the load interface circuit, the other end of the light emitting source of the optocoupler is grounded, one end of a light receiver of the optocoupler is connected with the main control circuit and a preset regulated power supply, and the other end of the light receiving source of the optocoupler is grounded, wherein the light emitting source is used for emitting light signals to the light receiver under the condition that the positive output end of the load interface circuit is connected with the negative load electrode so as to conduct the light receiver;

Or, the second detection circuit comprises a comparator, wherein the input end of the comparator is connected with the load interface circuit, and the output end of the comparator is connected with the main control circuit;

or, the second detection circuit comprises a triode, the first end of the triode is connected with the positive output end of the load interface circuit, the second end of the triode is connected with the negative output end of the load interface circuit, and the third end of the triode is connected with the main control circuit.

7. The power supply circuit of claim 1, further comprising an alarm circuit connected to the master circuit, the master circuit further configured to control the alarm circuit to output an alarm signal if it is detected that the energy storage component is not properly 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 connected in reverse to the load interface circuit.

8. The power supply circuit according to any one of claims 1 to 7, further comprising the air pump body;

The air pump switch circuit is used for responding to the second signal output by the main control circuit to conduct a power supply passage between the energy storage component and the air pump body so that the energy storage component supplies power to the air pump body.

9. The power supply circuit according to claim 8, wherein the air pump switching circuit comprises a switching tube, one end of the air pump body is connected with a first end of the switching tube, the other end of the air pump body is used for being connected with the energy storage component, a second end of the switching tube is grounded, and a controlled end of the switching tube is connected with 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 passage.

10. The power supply circuit according to any one of claims 1 to 7, wherein the main control circuit is provided with a first trigger module, and is further configured to output a third signal to the power supply switch circuit when the first trigger module is triggered by an external operation, so that the power supply switch circuit turns on a power supply path between the energy storage component and the load; and/or the number of the groups of groups,

The main control circuit is provided with a second trigger module, and the main control circuit is used for generating the air pump trigger signal when the second trigger module is triggered by external operation.

11. The power supply circuit according to claim 10, wherein when the power supply switch circuit is turned on, the main control circuit is further configured to output the first signal to the power supply switch circuit under a condition that the first trigger module is triggered by an external operation; and/or the number of the groups of groups,

When the air pump body works, the main control circuit is further used for outputting a fourth signal to the air pump body under the condition that the second trigger module is triggered by external operation, so that the air pump body stops working.

12. The power supply circuit according to any one of claims 1 to 7, wherein the power supply circuit further comprises a conversion circuit;

The switching circuit is used for connecting the energy storage component and the main control circuit, converting the power supply voltage output by the energy storage component into working voltage, and outputting the working voltage to the main control circuit.

13. An emergency device comprising a housing, an energy storage assembly, and a power supply circuit as claimed in any one of claims 1 to 12, the energy storage assembly and the power supply circuit being at least partially structurally disposed within the housing.