A power supply circuit and an emergency device

Abstract

The present invention provides a power supply circuit and an emergency device. The power supply circuit comprises a load interface for connecting a load; a power supply switch for connecting or disconnecting a circuit between an energy storage unit and the load interface; a main control circuit, configured to control the power supply switch to be in a state of connecting or disconnecting, so as to connect or disconnect a power supply path between the energy storage unit and the load. By utilizing the main control circuit, the control to the switch of power supply to load can be optimized.

Description

Power supply circuits and emergency equipment Technical Field

[0001] The present application relates to the field of power supply technology, and in particular to a power supply circuit and emergency equipment. Background Art

[0002] In the use scenario of motor vehicles, when starting the vehicle engine, the battery is required to provide starting current for ignition starting. However, when the battery is insufficient in power, it cannot provide starting current for the vehicle. On the other hand, when the tire pressure of the vehicle is insufficient, the driving of the vehicle will be greatly affected.

[0003] 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 using the air pump to inflate the tires also requires power support.

[0004] Current starting power supplies on the market also have certain issues. For example, existing starting power supplies require manual operation to start outputting power, which is inconvenient and inefficient. Another example is that if the starting power supply is connected to the battery in reverse, starting the vehicle can easily damage the battery or cause a fire.

[0005] Summary of the Invention

[0006] The primary purpose of this application is to provide a power supply circuit and emergency device designed to optimize control of the load power switch through a master control circuit. Furthermore, the same emergency device can be used to provide both emergency ignition and tire inflation, centrally and flexibly controlling both functions. This reduces the size of the emergency device, making it more portable, and improves the safety of the emergency ignition.

[0007] In a first aspect, the present application provides a power supply circuit, comprising:

[0008] Load interface, used to connect the load;

[0009] A power switch, used to connect or disconnect the circuit between the energy storage component and the load interface;

[0010] A main control circuit is configured to control the power switch to be turned on or off, thereby turning on or off the power supply path between the energy storage component and the load.

[0011] In a second aspect, the present application provides a power supply circuit, the power supply circuit comprising:

[0012] A load interface circuit, used for connecting a load;

[0013] A power supply switch circuit, used to connect the energy storage component and the load interface circuit;

[0014] An air pump switch circuit is provided in a power supply path formed by the energy storage component and the air pump body;

[0015] The main control circuit is connected to the power supply switch circuit and the air pump body;

[0016] The main control circuit is used to control the power supply switch circuit to conduct or disconnect the power supply path between the energy storage component and the load, and is also used to control the air pump switch circuit to conduct or disconnect the power supply path between the energy storage component and the air pump body;

[0017] The load includes at least one of a starter and a vehicle battery.

[0018] In a third aspect, the present application further provides an emergency device, comprising a housing, an energy storage component, and any power supply circuit provided in the embodiments of the application. The energy storage component and the power supply circuit are at least partially disposed within the housing.

[0019] In summary, the present application provides a power supply circuit and emergency equipment, which have a main control circuit, thereby optimizing the control of the load power supply switch.

[0020] For example, the present invention can save energy consumption during the ignition start function.

[0021] For example, the present invention can detect reverse connection of a load and avoid supplying power to the load when the connection is reversed.

[0022] For example, the present invention can detect the status of the energy storage component to avoid external power supply when the power / voltage is too low.

[0023] For example, the present invention can conveniently switch between multiple functions and multiple modes through the design of trigger modules and trigger actions.

[0024] In addition, the present invention can serve as both an emergency ignition device and a tire inflator, and can flexibly control the operation of the circuits corresponding to the two different functions, while reducing the size of the emergency device to make it easy to carry.

[0025] In addition, the present invention can improve the safety of emergency ignition. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. 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 any creative work.

[0027] FIG1a is a schematic diagram of a module of an embodiment of a power supply circuit according to an embodiment of the present application;

[0028] FIG1b is a module schematic diagram of an embodiment of a power supply circuit provided in an embodiment of the present application;

[0029] FIG1c is a module schematic diagram of an embodiment of a power supply circuit provided in an embodiment of the present application;

[0030] 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;

[0031] FIG3a is a schematic diagram of the circuit structure of a power supply circuit provided in an embodiment of the present application;

[0032] FIG3 b is a schematic diagram of the circuit structure of a power supply circuit provided in an embodiment of the present application;

[0033] FIG4 is a schematic diagram of a circuit structure of an embodiment of a first detection circuit in a power supply circuit provided in an embodiment of the present application;

[0034] FIG5 is a circuit structure diagram of another embodiment of the first detection circuit in the power supply circuit provided in an embodiment of the present application;

[0035] FIG6 is a schematic diagram of a circuit structure of an embodiment of a second detection circuit in a power supply circuit provided in an embodiment of the present application;

[0036] FIG7 is a schematic diagram of a module structure of another embodiment of a power supply circuit provided in an embodiment of the present application;

[0037] 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;

[0038] FIG9 is a schematic diagram of a module of an embodiment of an emergency device provided in an embodiment of the present application;

[0039] FIG10 is a module diagram of another embodiment of the emergency equipment provided in an embodiment of the present application.

[0040] Description of reference numerals: 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. Voltage-stabilized power supply; D1. Light source; D2. Light receiver; K1. First switch. DETAILED DESCRIPTION

[0041] The present invention provides a power supply circuit, comprising:

[0042] Load interface, used to connect the load;

[0043] A power switch, used to connect or disconnect the circuit between the energy storage component and the load interface;

[0044] A main control circuit is configured to control the power switch to be turned on or off, thereby turning on or off the power supply path between the energy storage component and the load.

[0045] The power supply circuit is configured such that when certain preset conditions are met, the main control circuit controls the power switch circuit to be turned on or off, thereby starting or stopping the energy storage component from supplying power to the load.

[0046] The load includes at least one of a starter and a vehicle battery.

[0047] In use, the load may be a vehicle battery. When the energy storage assembly of the present invention is connected to the vehicle battery, common uses may be to start the vehicle in an emergency or to charge the vehicle battery.

[0048] In the prior art, generally only one power supply switch is provided. When the button controlling the switch is pressed, the energy storage component outputs electrical energy to the vehicle battery (actually charging the vehicle battery). Then, when the vehicle ignition is started, power is also supplied to the ignition start to complete the ignition start.

[0049] The inventors of this case recognized that this existing technology presents several problems. First, current energy supply and charging circuits increasingly strive for rapid charging, and charging the vehicle battery with an energy storage component can lead to a rapid decrease in the stored energy within the energy storage component. Second, ignition itself does not require a significant amount of energy. Once a gasoline vehicle is successfully started, the gasoline engine automatically charges the vehicle battery.

[0050] This invention distinguishes between the vehicle battery charging and ignition start scenarios, preventing the energy storage component from overcharging the vehicle battery during the ignition start function. This reduces the consumption of stored energy in the energy storage component. As an additional emergency power source in a vehicle, if the stored energy is consumed too quickly, frequent recharging is required, making it more susceptible to power shortages in emergencies.

[0051] The embodiment provided by the present invention is:

[0052] The present invention has a main control circuit, so that the control of the load power supply switch can be optimized through the main control circuit.

[0053] For example, the power supply circuit of the present invention includes a first detection circuit. For example, the first detection circuit is located near the load interface. For example, there is an electrical connection between the first detection circuit and the load interface (e.g., the interface connected to the positive pole of the load). When the load interface is connected to the vehicle, the power supply circuit of the present invention can detect the occurrence of the "ignition start" action through the first detection circuit. When the power supply circuit of the present invention detects the occurrence of the "ignition start" action through the first detection circuit, the main control circuit controls the power supply switch to be turned on, and the energy storage component supplies power to the load.

[0054] In certain embodiments, when the power supply circuit of the present invention detects the occurrence of an "ignition start" action via the first detection circuit, the main control circuit controls the power switch to conduct, and remains on for a certain period of time T1 (T1 is generally 1-10 seconds, for example, 3 seconds, 5 seconds, or 7 seconds), and then automatically disconnects. After the certain period of continuous conduction, the ignition start is often complete. Automatic disconnection can prevent the energy storage component from overcharging the vehicle battery, thereby reducing the consumption of the energy stored in the energy storage component.

[0055] When the vehicle is ignited and started, the vehicle battery voltage will drop in a short period of time.

[0056] Therefore, in certain embodiments, the first detection circuit is configured to detect the electrical signal strength at a load interface (connected to a vehicle battery), such as the voltage at the load interface (i.e., the positive voltage of the connected vehicle battery). When it is detected that the electrical signal strength (e.g., voltage) at the load interface decreases by more than a preset threshold within a preset duration T0 (e.g., 2 MS), the main control circuit controls the power switch to conduct, causing the energy storage assembly to supply power to the load, thereby completing ignition startup.

[0057] The "automatic disconnection" of the present invention can be an unconditional automatic disconnection after a predetermined time T1 has expired, or it can be conditional automatic disconnection. An example of conditional automatic disconnection is: after a first predetermined time T1 has expired, a test is automatically initiated, and when the test results meet a certain condition, the connection is automatically disconnected. If the test results do not meet the set condition, the connection remains on without disconnection. Then, after a second predetermined time T2 has passed, the test is initiated again. Automatic disconnection occurs only when the test results meet the set condition.

[0058] For example, after the power supply is turned on for a certain period of time T1, the load current is detected, and when the load current is lower than a threshold, the power supply is turned off.

[0059] In one embodiment, the power supply circuit of the present invention may further include a current detection circuit for detecting the current magnitude of the energy storage component supplying power to the load. The current detection circuit may be disposed near the load interface, for example, electrically connected to the load interface (e.g., the negative electrode).

[0060] During the period when the energy storage component supplies power to the load to execute vehicle ignition start, the load supply current will be relatively large, and when the vehicle ignition start is completed, the load supply current will be relatively small.

[0061] Therefore, the main control circuit of the present invention can also be configured so that when the "ignition start" action occurs, the main control circuit controls the power switch to be turned on and remain on for a certain period of time (a certain preset time, such as 3 seconds or 5 seconds). The load supply current detected by the current detection circuit is then compared with a threshold. When the load supply current falls below the threshold, the main control circuit controls the power switch to be turned off. In other words, when it is detected that the load supply current is significantly lower than the vehicle ignition start operating current, the ignition start operation is considered complete, and the energy storage module stops supplying power to the load.

[0062] In order to distinguish the two scenario requirements of "vehicle battery charging" and "ignition starting", the present invention sets different switch operations for these two scenarios.

[0063] For example, the main control circuit of the present invention may be provided with several (one or more) trigger modules. The trigger module may include a push button switch, but is not limited thereto. Any device that can accept user interaction to achieve triggering can be used as the trigger module of the present invention. For example, a push button switch, a knob-type (or linear) mode selector, a touch screen selection, etc.

[0064] In one embodiment, in the "ignition start" mode, the user does not need to perform any switch operation (no need to operate the trigger module). In the "charging" mode, the user needs to manually perform switch operation (operate the trigger module).

[0065] For example, when the load interface is connected to the vehicle battery, and the power supply circuit of the present invention detects the occurrence of an "ignition start" action through the first detection circuit (for example, it is detected that the electrical signal strength (for example, voltage) at the load interface circuit decreases by more than a preset amplitude threshold within a first preset time period), the energy storage component automatically supplies power to the load (for example, continuously conducts for a time T1) without the user having to perform any triggering operation (without the need for the user to operate the trigger module). However, the user needs to trigger a trigger module (for example, press a corresponding button S1) to enter the "vehicle battery charging" mode. At this time, the energy storage component continues to supply power to the load until the user cuts off the power supply through the trigger module (for example, presses the button S1 again).

[0066] In another embodiment, the "ignition start" and "charging" modes correspond to different triggering actions under the trigger module. For example, when the trigger module is a plurality of buttons, they correspond to different button presses. For example, when the trigger module is a single button, one mode may be a single click, and the other mode may be a rapid double click. For example, when the trigger module is a mode selector, the two modes correspond to different gear selections. For example, the mode selector may be a knob-type (or linear) mode selector, such as one that allows the mode to be selected via a touch screen.

[0067] For example, in "charging" mode, when the load interface is connected to the vehicle battery, the energy storage component directly supplies power to the load. In "ignition start" mode, when the load interface is connected to the vehicle battery, the energy storage component does not directly supply power to the load. Instead, the energy storage component waits until the power supply circuit of the present invention detects the occurrence of an "ignition start" action through the first detection circuit (e.g., when the electrical signal strength (e.g., voltage) at the load interface circuit is detected to have decreased by more than a preset amplitude threshold within a first preset time period). Only then does the energy storage component supply power to the load (e.g., continuously conducting for a time T1).

[0068] In the present invention, an emergency device can also be provided, which not only has the function of emergency starting of the car, but also has the function of inflating the tires.

[0069] Therefore, the power supply circuit of the present invention may further include an air pump switch, and the main control circuit of the present invention is configured to be able to control the on or off of the air pump switch.

[0070] When the air pump switch is turned on, the energy storage component can supply power to the air pump. When the air pump switch is turned off, the energy storage component stops supplying power to the air pump.

[0071] Similarly, the present invention can be set to multiple modes, which can include at least two of the three modes of "charging", "ignition start", and "air pump". In addition, the present invention sets different switch operations for different modes.

[0072] In one embodiment, in the "ignition start" mode, the user does not need to perform any switch operation (no need to operate the trigger module). In the "charging" and / or "air pump" modes, the user needs to manually operate the switch (operate the trigger module).

[0073] When both "Charging" and "Air Pump" modes exist, they can correspond to different triggering actions under the trigger module. For example, when the user triggers the first trigger module (e.g., pressing button S1), the "Charging Mode" is entered, at which point the energy storage component supplies power to the air pump. When the user triggers the other trigger module (e.g., pressing button S2), the "Air Pump" mode is entered, at which point the energy storage component supplies power to the air pump.

[0074] In one embodiment, in the "ignition start", "air pump" and / or "charging" modes, different modes correspond to different triggering actions under the trigger module.

[0075] Regarding how different triggering actions trigger different modes, it is similar to the previous article. You can refer to the previous article and will not repeat it here.

[0076] In particular, the power supply circuit of the present invention may not include an energy storage component (ie, the energy storage component is externally connected to the outside of the power supply circuit), or it may include an energy storage component.

[0077] When the power supply circuit of the present invention contains both a power supply switch (for supplying power to the load) and an air pump switch (for supplying power to the air pump), the power supply circuit of the present invention can be designed so that the load and the air pump are connected to the same energy storage component (shared energy storage component), or it can be designed so that the load and the air pump are respectively connected to different energy storage components (different energy storage components).

[0078] The present invention is preferably designed so that the load and the air pump share the same energy storage component, which can minimize the volume and weight of the emergency equipment.

[0079] When the energy storage component of the present invention is used for both "ignition start" and "air pump", the implementation of the present invention in the "ignition start" mode can save the consumption of electric energy stored in the energy storage component during "ignition start", thereby alleviating the problem of insufficient electric energy in the "air pump" mode when the energy storage component is shared.

[0080] In order to optimize the power supply circuit of the present invention, the first detection circuit of the present invention may further include a reverse connection detection circuit. The reverse connection detection circuit is connected to the load interface. When the reverse connection detection circuit detects that the positive and negative poles of the load are reversed, the power switch in the power supply circuit of the present invention is disconnected (for example, the power switch is disconnected by controlling the main control circuit). At this time, even if the user performs a trigger action through the trigger mode (for example, pressing button S1), the energy storage component does not supply power to the load (the power switch is disconnected).

[0081] In order to optimize the power supply circuit of the present invention, the present invention may further include a second detection circuit. The second detection circuit is connected to the energy storage component. The second detection circuit is used to detect the status of the energy storage component, such as the remaining power, such as the output voltage. When the detection result of the second detection circuit meets certain preset conditions (for example, the power / voltage is lower than a certain value), the main control circuit controls all or part of the output switches (such as the power switch, the air pump switch) to be disconnected. Optionally, an alarm warning is issued at the same time (for example, a warning light is on, or a warning is displayed on the display).

[0082] Those skilled in the art will appreciate that the control function of the main control circuit of the present application may be achieved through electrical signal control or through control implemented by the circuit itself.

[0083] The electrical signal may include a digital signal and / or an analog signal, and may also have mutual conversion between digital signals and analog signals. For example, the main control circuit of the present application may include a microcontroller MCU. For example, the main control circuit may include a programmable controller. The main control circuit receives the detection signal from the first detection circuit and / or the second detection circuit through the electrical signal connection, and sends a control instruction to the power switch and / or the air pump switch.

[0084] In addition, the main control circuit of the present application can also be controlled by the circuit itself. For example, the main control circuit of the present application can be designed to receive electrical feedback (voltage or current, etc.) from the first detection circuit and / or the second detection circuit, and can turn on / off the power switch (power switch branch) and / or the air pump switch (air pump switch branch) under the scenarios / conditions described in the context.

[0085] It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, nor to the specific implementations given in the following figures. The various components of the present invention may use various implementations known to those skilled in the art, as long as they can achieve the functions of the present invention.

[0086] In one embodiment, the present invention provides a power supply circuit, comprising:

[0087] A load interface circuit, used for connecting a load;

[0088] A power supply switch circuit, used to connect the energy storage component and the load interface circuit;

[0089] An air pump switch circuit, the air pump switch circuit being provided in a power supply path formed by the energy storage component and the air pump body;

[0090] A main control circuit connected to the power switch circuit and the air pump body;

[0091] 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;

[0092] The load includes at least one of a starter and a vehicle battery.

[0093] In some embodiments, the main control circuit is configured to control the power switch circuit to disconnect the power supply path between the energy storage component and the load when it is detected that the load is reversely connected to the load interface circuit.

[0094] In some embodiments, the power supply circuit includes a first detection circuit, which 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.

[0095] In some embodiments, the first detection circuit includes an optocoupler, wherein one end of a light source of the optocoupler is connected to the positive output end of the load interface circuit, and the other end is grounded; one end of a light receiver of the optocoupler is connected to the main control circuit and a preset regulated power supply, and the other end is grounded; wherein the light source is configured to emit an optical signal to the light receiver when 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;

[0096] And / 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;

[0097] And / 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.

[0098] In some embodiments, 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.

[0099] In some embodiments, the main control circuit is configured to determine that the load performs a preset operation when it is detected that the decrease in the electrical signal strength at the load interface circuit exceeds a preset amplitude threshold within a first preset time period.

[0100] In some embodiments, 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,

[0101] The main control circuit is further configured to control the power supply switch 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.

[0102] In some embodiments, the main control circuit is further configured to not control 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 a second preset voltage threshold; and / or,

[0103] The main control circuit is further configured to control the air pump switch circuit to conduct a 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.

[0104] In some embodiments, the power supply circuit further includes a second detection circuit, which 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.

[0105] In some embodiments, the main control circuit is configured to control the power switch circuit to conduct a power supply path between the energy storage component and the load in response to a first start signal; and / or,

[0106] The main control circuit is provided with a first trigger module, and 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 when the first trigger module is triggered by an external operation; and / or,

[0107] 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,

[0108] 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.

[0109] In some embodiments, 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,

[0110] 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,

[0111] 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,

[0112] 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.

[0113] In some embodiments, the main control circuit is further configured to control the power switch circuit to cut off the power supply path between the energy storage component and the load after the power switch circuit is turned on for a second preset time period.

[0114] In some embodiments, the power supply circuit also includes an alarm circuit, which is connected to the main control circuit. The main control circuit is also 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.

[0115] In some embodiments, the air pump body is integrated into the power supply circuit; wherein, when the air pump switch circuit conducts the power supply path between the energy storage component and the air pump body, the air pump body operates under the power supply of the energy storage component.

[0116] In some embodiments, the air pump switching circuit includes a switching tube, one end of the air pump body is connected to a first end of the switching tube, the other end of the air pump body is used to connect to the energy storage component, the second end of the switching tube is grounded, and the controlled end of the switching tube is connected to the main control circuit;

[0117] 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.

[0118] In some embodiments, the power supply circuit further includes a conversion circuit;

[0119] 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.

[0120] The present invention may further provide an emergency device comprising an air blowing device.

[0121] Therefore, the power supply circuit of the present invention may further include a blower switch, and the main control circuit of the present invention is configured to control the on or off of the blower switch.

[0122] When the blower switch is turned on, the energy storage component can supply power to the blower device. When the air pump switch is turned off, the energy storage component stops supplying power to the blower device.

[0123] The present invention further comprises an air blowing device, said air blowing device comprising:

[0124] a blower switch, the blower switch being connected to the main control circuit, the main control circuit being used to control the blower switch;

[0125] a motor connected to the air blowing device and the air pump to drive the air blowing device and / or the air pump to operate;

[0126] During inflation and / or blowing, the air pump and the blower can be driven by the same motor. This reduces the space occupied by an additional motor compared to conventional systems, thereby reducing the size and weight of the integrated air pump and blower, making it easier to carry and use. In other examples, the air pump and the blower can be driven by different motors.

[0127] The air pump and the blowing device can be driven to operate simultaneously, or can be driven to operate separately.

[0128] The main control circuit may be provided with at least one trigger module, thereby allowing the user to select at least two different mode states.

[0129] Similarly, the present invention can be set to multiple modes, and the multiple modes can include at least one of the four modes of "charging", "ignition start", "air pump" and "blowing". The present invention sets different switch operations for different modes.

[0130] Of course, different modes can be set with different switches, or the same switch can be set. The corresponding mode can also be triggered by different triggering methods.

[0131] For example, triggering the trigger module different times within a preset time can enable different trigger modes. For example, triggering the trigger module once within a preset time will enable the "charging" mode; triggering the trigger module twice within a preset time will enable the "ignition start" mode; triggering the trigger module three times within a preset time will enable the "air pump" mode; triggering the trigger module four times within a preset time will enable the "blowing" mode.

[0132] The power supply circuit further includes: when the trigger module is not triggered, it enters the ignition start mode by default; when the trigger module is triggered, it enters the charging mode or the air pump mode or the blowing mode.

[0133] For example, compared with an air pump, the air blower has a higher air pressure and a smaller air volume, while the air pump has a lower air pressure and a larger air volume. Preferably, the air blower is used to inflate air mattresses, swimming rings, and inflatable toys, while the air pump is used to inflate tires.

[0134] The present invention also provides an emergency device comprising a housing, an energy storage assembly, and a power supply circuit as described herein. Exemplarily, the energy storage assembly and the power supply circuit are at least partially disposed within the same housing. Exemplarily, the energy storage assembly and the power supply circuit are at least partially disposed within different housings. In a preferred embodiment, the emergency device further comprises an air pump body.

[0135] The present invention also provides an emergency device, which includes a shell, an energy storage component and a power supply circuit as described in the present invention. Exemplarily, the energy storage component and the power supply circuit are at least partially arranged in the same shell. Exemplarily, the energy storage component and the power supply circuit are at least partially arranged in different shells. In a preferred embodiment, the emergency device also includes a blowing device. The air pump, the blowing device and the motor are all arranged in the shell, and the shell is provided with a first interface, and the first interface is used to receive the blowing device externally, wherein the first interface includes an air outlet, and the air outlet is connected to the blowing device for the blowing device to discharge air.

[0136] The present invention also provides an emergency device, which includes a shell, an energy storage component and a power supply circuit as described in the present invention, and at least part of the structure of the energy storage component and the power supply circuit is arranged in the shell. In a preferred embodiment, the emergency device also includes an air pump body and a blowing device. For example, at least one of the air pump, the blowing device and the motor is also arranged in the shell, and the shell is provided with a first interface and a second interface, the first interface is used to receive the blowing device externally, and the second interface is used to receive the inflatable device externally, wherein the first interface includes an air outlet, and the second interface includes an air outlet, the air outlet is connected to the blowing device for the blowing device to discharge air, and the air outlet is connected to the air pump for the air pump to discharge air.

[0137] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0138] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, combined, or partially merged, so the actual execution order may vary depending on the actual situation.

[0139] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0140] Please refer to FIG. 1 a , which is a module diagram of an implementation of a power supply circuit provided in an embodiment of the present application.

[0141] As shown in FIG1 a , the power supply circuit 1 includes at least 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.

[0142] Specifically, the load interface circuit 10 is used to connect to the load 3, the power switch circuit 20 is used to connect the energy storage assembly 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 assembly 2 and the air pump body 4. Therefore, 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 assembly 2 is connected to the power supply circuit 1, the energy storage assembly 2 is connected to the load 3 via the power switch circuit 20 and the load interface circuit 10, and the energy storage assembly 2, the air pump body 4, and the air pump switch circuit 30 form a power supply path.

[0143] The load 3 includes at least one of a starter and a vehicle battery.

[0144] The air pump body 4 is used to perform an inflating operation under the condition of power input, for example, to inflate the tires of a vehicle.

[0145] 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.

[0146] 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.

[0147] When the main control circuit 40 outputs a first signal to the power switch circuit 20, the power switch circuit 20 switches to an on state in response to the first signal, thereby connecting 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. The energy storage component 2 can then supply power to the load 3. On the other hand, when the main control circuit 40 outputs a second signal to the power switch circuit 20, the power switch circuit 20 switches to an 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 disconnected, and the energy storage component 2 stops supplying power to the load 3.

[0148] Taking load 3 as at least one of a starter and a vehicle battery as an example, when the vehicle cannot start normally due to insufficient battery power, the energy storage component 2 supplies power to load 3 to assist the vehicle in emergency ignition.

[0149] 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.

[0150] When the main control circuit 40 outputs a third signal to the air pump switch circuit 30, the air pump switch circuit 30 switches to an on state in response to the third signal, so that the energy storage assembly 2, the air pump body 4, and the air pump switch circuit 30 form a conductive power supply circuit 1. The energy storage assembly 2 supplies power to the air pump body 4 to support the air pump body 4's pumping operation. On the other hand, when the main control circuit 40 outputs a third signal to the air pump switch circuit 30, the air pump switch circuit 30 switches to an off state, and the energy storage assembly 2 is unable to supply power to the air pump body 4.

[0151] 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 shutdown 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 volume.

[0152] FIG1b is a module schematic diagram of an embodiment of a power supply circuit provided in an embodiment of the present application. In this embodiment, the air pump 4 and the load 3 share the same energy storage assembly 2. The power supply circuit 1 has an air pump switch branch (with an air pump switch 30) and also has a power supply switch branch (with a power supply switch 20). The main control circuit 40 is located at the intersection of the air pump switch branch and the power supply switch branch, so as to be able to control the on / off of the air pump switch branch and the on / off of the power supply switch branch. As shown in FIG1b, the first port of the main control circuit 40 is used to be electrically connected to the energy storage assembly 2, the second port is electrically connected to the air pump switch 30, and the third port is electrically connected to the power supply switch 20.

[0153] FIG1c is a schematic diagram of a module of an embodiment of a power supply circuit according to an embodiment of the present application. Compared with FIG1b , a first detection circuit 50 and / or a second detection circuit 60 are added and electrically connected to the main control circuit 40 .

[0154] The first detection circuit 50 is electrically connected to the load interface 10 and is therefore capable of detecting the electrical state (e.g., voltage) of the load interface 10. For example, the first detection circuit can detect the occurrence of "ignition start" on the load and / or "reverse connection" of the positive and negative poles of the load.

[0155] The second detection circuit 60 is electrically connected to the energy storage component 2 , and thus can detect the electrical state of the energy storage component 2 (eg, remaining power, output voltage, etc.).

[0156] Those skilled in the art will appreciate that, in the present embodiment, the control function of the main control circuit can be implemented by circuit design. For example, the main control circuit of the present application can be designed to receive electrical feedback (voltage or current, etc.) from the first detection circuit / the second detection circuit, thereby turning on / off the power supply switch branch or the air pump switch branch. In the present invention, under certain scenarios / conditions, the results of the on / off control brought about by the detection circuit and the main control circuit are as described in the context. Those skilled in the art will appreciate that the present invention is not limited to a specific circuit design, as long as those skilled in the art know that the control function described in the present invention can be implemented.

[0157] Please refer to FIG. 2 , which is a schematic diagram of a module structure of another embodiment of a power supply circuit provided in an embodiment of the present application.

[0158] As shown in FIG2 , in some embodiments, the power supply circuit 1 further includes an energy storage component 2 , which is connected to the power supply switch circuit 20 , that is, the energy storage component 2 is an integral part of the power supply circuit 1 .

[0159] As shown in Figure 2, in some embodiments, the power supply circuit 1 also includes an air pump body 4, and the energy storage component 2, the air pump body 4 and the air pump switching circuit 30 form a power supply path, that is, the air pump body 4 is an integral part of the power supply circuit 1.

[0160] It should be noted that the above two embodiments 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.

[0161] 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 .

[0162] Specifically, when the main control circuit 40 detects that the load 3 is reversely connected to the load interface circuit 10 , it outputs a second signal to the power switch circuit 20 to disconnect the power supply path between the energy storage component 2 and the load 3 .

[0163] 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 supply switch circuit 20 to turn on, the main control circuit 40 continues to output a second signal to the power supply switch circuit 20, so that the power supply switch circuit 20 remains in the off state, thereby improving power supply safety.

[0164] 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.

[0165] 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 switching circuit 30 under the condition of receiving the air pump trigger signal, so as 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.

[0166] 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 user operation, for example, it is generated when a preset button in the power supply circuit 1 is triggered by operation.

[0167] Please refer to Figures 3 and 4. Figure 3a or Figure 3b is a circuit structure diagram of the power supply circuit of an embodiment of the present application, and Figure 4 is a circuit structure diagram of an implementation method of the first detection circuit in the power supply circuit provided in an embodiment of the present application.

[0168] As shown in FIG3 a , the main control circuit 40 obtains detection information from the first detection circuit 50 and / or the second detection circuit 60 , and controls the on / off of the power supply switch circuit 20 through signals (eg, first / second / third / fourth signals).

[0169] As shown in Figure 3b, the energy storage assembly 2 (optionally via the conversion circuit 80) supplies power to the main control circuit. The main control circuit 40 is connected to the first detection circuit 50 / second detection circuit 60 / power switch K1 / air pump switch K2 via electrical signals. The main control circuit 40 receives detection signals from the first detection circuit 50 and / or the second detection circuit 60 and issues control instructions to the power switch K1 and / or the air pump switch K2 to turn them on or off.

[0170] In the embodiment shown in FIG3b, an energy storage component is connected to three branches, an air pump branch, a main control circuit branch, and a load branch, and these three branches are connected in parallel. However, the present application is not limited to this embodiment. For example, the main control circuit can be powered by an independent power supply instead of sharing the power supply with the air pump branch / load branch. As shown in FIG1 to FIG4, in some embodiments, the power supply circuit 1 may include 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 electrical signal strength at the load interface circuit 10 and output the detection result to the main control circuit 40;

[0171] The main control circuit 40 is configured 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.

[0172] Illustratively, 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.

[0173] In some embodiments, the load interface circuit 10 is provided with a positive output terminal P1 and a negative output terminal P2 , 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 .

[0174] Specifically, the positive output terminal P1 and the negative output terminal P2 in the load interface circuit 10 are used to be connected one-to-one with the positive and negative poles of the load 3. 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.

[0175] Accordingly, the first detection circuit 50 is specifically configured to detect the voltage at 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 connection of the load 3 to avoid emergency power supply to the abnormally connected load 3, thereby improving power supply safety.

[0176] 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 input of a light signal.

[0177] 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 regulated power supply V1, and the other end is grounded. The light source D1 is used to emit a light 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 that the light receiver D2 is turned on.

[0178] 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.

[0179] 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.

[0180] 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. 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 is reversely connected to the load interface circuit 10.

[0181] 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, 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 light receiver 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 light receiver D2 is stable.

[0182] 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.

[0183] Therefore, when the main control circuit 40 detects that the voltage at the connection between 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 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 light receiver 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 an abnormality in the connection of the load 3 to avoid emergency power supply to the abnormally connected load 3, thereby improving power supply safety.

[0184] In 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 .

[0185] 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.

[0186] 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.

[0187] 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, and the negative electrode 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.

[0188] 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.

[0189] 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.

[0190] Specifically, if the signal strength at the third terminal of the transistor matches the difference between the signal strengths at the first terminal and the second terminal, the main control circuit 40 can detect the signal at the third terminal 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.

[0191] Please refer to FIG5 , which is a circuit structure diagram of an implementation of a first detection circuit in a power supply circuit provided in an embodiment of the present application.

[0192] The first detection circuit 50 in this embodiment can detect the occurrence of the vehicle ignition start action.

[0193] For example, the first detection circuit 50 has at least two resistors R4 and R5 connected in series, one end of which is connected to the load interface P1 and the positive electrode of the load, and the other end is grounded. The divided voltage of one resistor R5 is input to the main control circuit 40 as an input signal.

[0194] Preferably, the first detection circuit 50 further includes a capacitor C1 connected in parallel with R5 to prevent excessive transient current and protect electrical components.

[0195] Specifically, 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 output end P1, the second end of the fourth resistor R4 is connected to the first end of the fifth resistor R5, and the second end of the fifth resistor R5 is grounded.

[0196] 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 .

[0197] A first end of the first capacitor C1 is connected to a first end of the fifth resistor R5 , and a second end of the first capacitor C1 is connected to a second end of the fifth resistor R5 .

[0198] The working principle of the above-mentioned first detection circuit 50 is explained as follows: 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, and is grounded in sequence through the positive output terminal P1, the fourth resistor R4 and the fifth resistor R5. The fourth resistor R4 and the fifth resistor R5 cooperate to divide the voltage at the positive output terminal P1 to obtain a corresponding voltage division, and the voltage division is used as an output to the detection result main control circuit 40, so that the main control circuit 40 obtains the electrical signal strength at the load interface circuit 10 according to the detection result.

[0199] The first capacitor C2 and the fifth resistor R5 are designed to be connected in parallel to absorb voltage fluctuations that may occur at the load interface circuit 10, thereby buffering the voltage division and protecting electronic devices.

[0200] In some embodiments, the main control circuit 40 is configured 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.

[0201] Specifically, when the main control circuit 40 detects that the load 3 performs a preset operation, it outputs a first signal to the power supply switch circuit 20 to enable the power supply switch circuit 20 to conduct the power supply path between the energy storage component 2 and the load 3.

[0202] Illustratively, in this embodiment, the preset operation includes but is not limited to: the load 3 performs an ignition operation.

[0203] 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 significantly 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.

[0204] Furthermore, when the load 3 is reversely connected to the load interface circuit 10, even if the load 3 performs the 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.

[0205] 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 detects 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.

[0206] In some embodiments, the main control circuit is configured to determine that the load performs a preset operation when it is detected that the decrease in the electrical signal strength at the load interface circuit exceeds a preset amplitude threshold within a first preset time period.

[0207] 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 is ignited, the electrical signal strength at the connection between load 3 and load interface circuit 10 will drop within a short period of time.

[0208] 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 indicate that the vehicle is undergoing an ignition operation, and the main control circuit 40 can determine that the load 3 is performing a preset operation.

[0209] For example, the electrical signal strength at the load interface circuit 10 can be a voltage or current value at the connection point of the load interface circuit 10. For example, the first preset duration is 2ms, and the second electrical signal strength is 1V. That is, if 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 undergoing an ignition operation, and the main control circuit 40 can determine that the load 3 is executing a preset operation.

[0210] Thus, 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.

[0211] 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.

[0212] Specifically, when the main control circuit 40 outputs the third signal to the power supply switch circuit 20, the power supply switch circuit 20 controls the first switch to switch to the off state, so that the power supply circuit between the energy storage component 2, the power supply switch circuit 20, the load interface circuit 10 and the load 3 is disconnected.

[0213] It should be understood that when the car battery is low on power, the load 3 needs power supply support from the energy storage component 2 for ignition, and after the load 3 completes ignition, the connection between the energy storage component 2 and the load 3 can be disconnected. 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 turns 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 is required by the user.

[0214] 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,

[0215] The main control circuit is further configured 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.

[0216] It should be noted that the above two implementation modes can be implemented separately or in combination.

[0217] The specific method of combining the above two implementation modes is described below with examples:

[0218] 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 external input operation, 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, it is allowed to control the power supply switch circuit 20 to turn on the power supply path between the energy storage component 2 and the load 3.

[0219] 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,

[0220] The main control circuit is also used to allow the air pump switch circuit 30 to control the power supply path between the energy storage component 2 and the air pump when the voltage of the energy storage component 2 exceeds a second preset voltage threshold.

[0221] It should be noted that the above two implementation modes can be implemented separately or in combination.

[0222] The specific method of combining the above two implementation modes is described below with examples:

[0223] 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 external input operation, 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.

[0224] 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 to different values, which is not specifically limited here.

[0225] 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 has occurred, such as insufficient power 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 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 off, so as to avoid invalid conduction of the power supply switch circuit 20 and / or the air pump switch circuit 30, and further avoid 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.

[0226] 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 replace the energy storage component 2 in time, reconnect the energy storage component 2 correctly, 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.

[0227] 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.

[0228] 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.

[0229] Specifically, the power supply switch circuit 20 is provided with a positive input terminal B1 and a negative input terminal B2, which are used to be connected one-to-one with the positive and negative poles 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.

[0230] 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 .

[0231] For example, the second detection circuit 60 has at least two resistors R6 and R7 connected in series, one end of which is connected to the positive electrode B1 of the energy storage component 2 and the other end is grounded. The divided voltage of one resistor R7 is input to the main control circuit 40 as an input signal.

[0232] Preferably, the second detection circuit 60 further includes a capacitor C2 connected in parallel with R7 to prevent excessive transient current and protect electrical components.

[0233] 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, and 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.

[0234] The working principle of the above-mentioned second detection circuit 60 is explained as follows: 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.

[0235] 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 divided voltage, thereby buffering the divided voltage and protecting electronic devices.

[0236] Please refer to FIG. 7 , which is a schematic diagram of a module structure of another embodiment of a power supply circuit provided in an embodiment of the present application.

[0237] As shown in FIG7 , in some embodiments, the power supply circuit 1 provided in the embodiments of the present application further includes at least one trigger module. For example, the trigger module may specifically include 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 manually triggered, 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.

[0238] The first trigger module, the second trigger module, the third trigger module and the fourth trigger module are, for example, buttons.

[0239] 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.

[0240] 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.

[0241] In some embodiments, the main control circuit is configured to control the power switch circuit 20 to conduct a power supply path between the energy storage component 2 and the load 3 in response to the first shutdown signal; and / or,

[0242] 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.

[0243] Specifically, when the power switch circuit 20 is turned on, the user can trigger the second trigger module or manually input a first shutdown signal to the main control circuit 40 to shut off the power supply path between the energy storage assembly 2 and the load 3, thereby manually shutting off the emergency power supply from the energy storage assembly 2 to the load 3. This allows the user to conveniently interrupt the power supply from the power supply circuit 1 to the energy storage assembly 2, further improving the operational safety of the power supply circuit 1.

[0244] 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.

[0245] 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,

[0246] 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.

[0247] 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 turning on the energy storage component 2 to supply power to the air pump body 4.

[0248] 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,

[0249] 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.

[0250] Specifically, when the air pump switch circuit 30 is turned on, the user can trigger the fourth trigger module or manually input a second shutdown signal to the main control circuit to cause the main control circuit 40 to shut off the power supply path between the energy storage assembly 2 and the air pump body 4, thereby manually shutting off the power supply from the energy storage assembly 2 to the air pump body 4. This allows the user to conveniently interrupt the power supply from the power supply circuit 1 to the air pump body 4, further improving the operational safety of the power supply circuit 1.

[0251] 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.

[0252] 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 that the voltage of the energy storage component 2 connected to the power supply switch circuit 20 does not exceed the preset voltage threshold, or that the load 3 is reversely connected to the load interface circuit 10.

[0253] It should be noted that the preset voltage threshold may be a first preset voltage threshold or a second preset voltage threshold.

[0254] 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.

[0255] 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 has 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.

[0256] As shown in FIG2 and FIG7 , in some embodiments, the air pump body 4 is integrated into the power supply circuit 1;

[0257] 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 .

[0258] Please refer to FIG8 , which is a schematic diagram of the circuit structure of the air pump switch circuit in one embodiment of the power supply circuit provided in the embodiment of the present application.

[0259] As shown in FIG8 , in some embodiments, the air pump switching circuit 30 includes a switch tube Q1, one end of the air pump body 4 is connected to a first end of the switch tube Q1, the other end of the air pump body 4 is used to connect to the energy storage assembly 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;

[0260] 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.

[0261] 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.

[0262] 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.

[0263] 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.

[0264] Exemplarily, the switch tube Q1 is one of an N-channel MOS tube, a P-channel MOS tube, a PNP transistor and an NPN transistor.

[0265] In some embodiments, the air pump switching circuit 30 further 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. The eighth resistor R8 and the ninth resistor R9 are used to protect the switch tube Q1.

[0266] In some embodiments, the power supply circuit 1 further includes a conversion circuit 80;

[0267] The conversion circuit 80 is used to connect the energy storage component 2 and the main control circuit 40 , convert the supply voltage output by the energy storage component 2 into an operating voltage, and output the operating voltage to the main control circuit 40 .

[0268] Specifically, the power supply voltage output by the energy storage component 2 is greater than the operating voltage corresponding to the main control circuit 40. For example, the power supply voltage output by the energy storage component 2 is greater than 5V, while the operating voltage corresponding to the main control circuit 40 is 5V.

[0269] Therefore, the supply voltage output by the energy storage assembly 2 cannot be directly supplied to the main control circuit 40 to operate the main control circuit 40, 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 assembly 2 and the main control circuit 40 to convert the supply voltage output by the energy storage assembly 2 into an operating voltage, and then output the operating voltage to the main control circuit 40 to ensure the normal operation of the main control circuit 40 and protect the main control circuit 40.

[0270] Please refer to FIG. 9 , which is a module diagram of an embodiment of an emergency device 6 provided in an embodiment of the present application.

[0271] 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.

[0272] Exemplarily, the emergency device 6 includes a vehicle emergency starting power supply and / or a battery clamp.

[0273] Specifically, in the emergency equipment 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 equipment 6 so that the energy storage component 2 provides emergency power supply 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.

[0274] 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.

[0275] Please refer to FIG. 10 , which is a module diagram of another embodiment of the emergency device 6 provided in an embodiment of the present application.

[0276] As shown in FIG10 , 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 support to the air pump body 4 through the power supply circuit 1. The emergency device 6 is also used to inflate the vehicle tires.

[0277] 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 this 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, or 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.

[0278] It should also be understood that the term "and / or" used in this specification 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 variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements that are 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 that includes the element.

[0279] The serial numbers of the embodiments of the present application are for descriptive purposes only and do not represent the merits of the embodiments. The above description is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any easily conceivable equivalent modifications or replacements should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A power supply circuit, comprising: Load interface, used to connect the load; A power switch, used to connect or disconnect the circuit between the energy storage component and the load interface; A main control circuit is configured to control the power switch to be turned on or off, thereby turning on or off a power supply path between the energy storage component and the load.

2. The power supply circuit as described in right 1 further comprises a first detection circuit; when the load interface is connected to the vehicle, the power supply circuit can detect the occurrence of the vehicle ignition start action through the first detection circuit.

3. As described in claim 2, the power supply circuit is configured so that when the first detection circuit detects that the ignition start action occurs, the main control circuit controls the power supply switch to be turned on; preferably, after being turned on for a certain period of time, the main control circuit automatically controls the power supply switch to be turned off.

4. The power supply circuit as described in any one of claims 1 to 3 comprises a first detection circuit, which is configured to detect the strength of the electrical signal at the load interface, such as the voltage.

5. In the power supply circuit as described in any one of claims 1 to 4, when it is detected that the electrical signal strength, such as voltage, at the load interface decreases by more than a preset amplitude threshold within a preset time period, the main control circuit controls the power supply switch to be turned on; preferably, after being turned on for a certain period of time, the main control circuit automatically controls the power supply switch to be turned off.

6. The power supply circuit as described in any one of claims 1 to 5 further includes an air pump switch, and the main control circuit is configured to control the on or off of the air pump switch.

7. In the power supply circuit as described in any one of claims 1 to 6, the main control circuit is provided with at least one trigger module, so that the user can select at least two different mode states.

8. As described in claim 7, the power supply circuit can be configured to: when the trigger module is not triggered, enter the ignition start mode by default; when the trigger module is triggered, enter the charging or air pump mode.

9. The power supply circuit as described in claim 7, wherein the power supply circuit can be configured to enter different modes according to different trigger modules and / or different trigger actions.

10. The power supply circuit as described in any one of claims 1 to 9 comprises a first detection circuit, and the first detection circuit is capable of detecting whether the load is reversely connected.

11. A power supply circuit as described in any one of claims 1 to 10, comprising a second detection circuit, the second detection circuit is used to detect the state of the energy storage component, such as the remaining power and / or the output voltage.

12. A power supply circuit as described in any one of claims 1 to 11, which includes a first detection circuit, and the first detection circuit has at least two resistors connected in series, one end of which is connected to the load interface for connecting to the positive electrode of the load, and the other end is grounded; preferably, the first detection circuit also contains a capacitor.

13. The power supply circuit according to any one of claims 1 to 12, further comprising a blower switch, wherein the main control circuit is configured to control the on or off of the blower switch.

14. A power supply circuit as described in any one of claims 1 to 13, comprising an energy storage component.

15. An emergency device, comprising a housing, an energy storage assembly, and a power supply circuit as described in any one of claims 1 to 12.

16. The emergency equipment as described in claim 14 further comprises an air pump body and / or a blowing device.