Emergency device

Abstract

The utility model provides an emergency device, which relates to the technical field of hand-cranking charging and comprises a battery, a hand-cranking charging module, a voltage regulation module and emergency equipment, and the hand-cranking charging module supplies power to the battery through the voltage regulation module. The voltage regulation module comprises a step-down circuit, a booster circuit and a charging circuit, the input end of the step-down circuit is connected with the voltage output end of the hand-cranking charging module, the booster circuit is connected with the voltage output end of the hand-cranking charging module through a first switching circuit, and the charging circuit is connected with the voltage output end of the hand-cranking charging module through a second switching circuit; the output ends of the step-down circuit and the step-up circuit are connected with the input end of the charging circuit; the output end of the charging circuit is connected with the battery; the switching circuit is controlled by the MCU control module, and on-off is achieved through a transistor. Through the above structure, the output voltage of the hand-cranking charging module is stabilized in a certain range, the charging efficiency is significantly improved, and the damage of voltage fluctuation to a battery and equipment is avoided at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of hand-cranked charging, in particular to an emergency device. Background Art

[0002] Portable products currently available on the market usually require charging before use. When the battery is exhausted, they cannot be used. Especially in emergency scenarios, such as disaster relief, inspection work, field operations, etc., when there is a lack of power supply, the power problem of the equipment becomes a serious constraint. To solve this problem, hand-cranked power generation technology came into being, providing a charging method that does not rely on external power supply. It can provide power for equipment anywhere and is widely used in emergency devices such as flashlights, power banks, and ultraviolet disinfection lamps.

[0003] However, during the use of a hand-cranked generator, its output voltage varies with the hand-cranking speed. Often, the hand-cranking speed is faster at the beginning, producing an output higher than the required voltage. Later, due to fatigue, the hand-cranking speed slows down and the output voltage decreases. The unstable output voltage not only affects the charging efficiency, but may also cause long-term damage to the batteries of electronic devices. Utility Model Content

[0004] In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to propose an emergency device, which adopts the following technical solutions:

[0005] The utility model provides an emergency device, which is characterized by comprising a battery, a hand-cranked charging module and a voltage regulating module, wherein the hand-cranked charging module supplies power to the battery through the voltage regulating module;

[0006] The voltage regulating module comprises a step-down circuit, a step-up circuit and a charging circuit. The input end of the step-down circuit is connected to the voltage output end of the hand-cranked charging module, and the output end is connected to the input end of the charging circuit; the input end of the step-up circuit is connected to the voltage output end of the hand-cranked charging module through a first switch circuit, and the output end is connected to the input end of the charging circuit; the input end of the charging circuit is connected to the voltage output end of the hand-cranked charging module through a second switch circuit, and the output end of the charging circuit is connected to the battery;

[0007] The above-mentioned first switching circuit includes a first electrically controlled switch and a second electrically controlled switch. The above-mentioned first electrically controlled switch receives a control signal and controls the on-off of the above-mentioned second electrically controlled switch; the above-mentioned second electrically controlled switch is used to control the on-off of the boost circuit; the above-mentioned second switching circuit structure is consistent with the above-mentioned first switching circuit structure, and controls the on-off of the above-mentioned charging circuit.

[0008] As a further improvement, the first electronically controlled switch is an NPN transistor, the second electronically controlled switch is a PMOS transistor, the base of the NPN transistor is connected to the control signal, the emitter is grounded, and the collector is connected to the gate of the PMOS transistor; the source of the PMOS transistor is connected to the voltage output end of the hand-cranked charging module, and the drain is connected to the boost circuit;

[0009] The base of the NPN transistor is connected in series with a protection resistor and a pull-down resistor;

[0010] A capacitor is connected between the source and gate of the PMOS transistor, a voltage divider resistor is connected between the source and the collector of the NPN transistor, and a second voltage divider resistor is connected between the collector of the NPN transistor and the gate of the PMOS transistor.

[0011] As a further improvement, the step-down circuit includes a chip EA9206 and its peripheral circuits, and an anti-reverse current diode D1 is arranged between the step-down circuit and the charging circuit.

[0012] As a further improvement, the boost circuit includes a chip MT3540 and its peripheral circuits, and an anti-reverse current diode D2 is arranged between the boost circuit and the charging circuit.

[0013] As a further improvement, the charging circuit includes a chip TP4056-MS and its peripheral circuits, and an anti-reverse current diode D3 is arranged between the charging circuit and the second switch circuit.

[0014] As a further improvement, it also includes an MCU control module, which is electrically connected to the hand-cranked charging module and sends the control signal to the boost circuit or the charging circuit according to the output voltage of the hand-cranked charging module.

[0015] As a further improvement, it also includes a power bank and an emergency equipment component, the power bank is pluggably electrically connected to the battery, and the battery supplies power to the emergency equipment component.

[0016] As a further improvement, the power bank is provided with a TYPE-C interface for charging and discharging.

[0017] As a further improvement, the above-mentioned emergency equipment components include but are not limited to any one or more combinations of flashlight modules, radio modules, and ultraviolet disinfection lamp modules.

[0018] As a further improvement, an LDO constant voltage output module is provided between the battery and the radio module.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] First, the utility model sets a step-down circuit, a boost circuit and a charging circuit at the voltage output end of the hand-cranked charging module. When the output voltage of the hand-cranked charging module is higher than the preset voltage, the battery is charged through the step-down circuit. When the output voltage is lower than the preset voltage, the battery is charged through the boost circuit. When the output voltage is equal to the preset voltage or the voltage difference between the output voltage and the preset voltage is not enough to respond to the step-down circuit and the boost circuit, the battery is charged through the charging circuit. This structure stabilizes the output voltage of the hand-cranked charging module within a certain range, effectively improves the charging efficiency, and at the same time enhances the safety of the charging process, avoiding damage to the battery or equipment caused by voltage fluctuations.

[0021] Secondly, the utility model adds a switch circuit connected to the MCU at the input end of the boost circuit and the charging circuit, including an NPN transistor and a PMOS transistor. When the output voltage of the hand-cranked charging module is greater than the preset voltage, the battery is charged through the buck circuit. When the output voltage is less than the preset voltage, the MCU sends a control signal to turn on the PMOS transistor of the switch circuit at the input end of the boost circuit, thereby turning on the NPN transistor, so that the hand-cranked charging module supplies power to the battery through the boost circuit; when the output voltage is within a certain range of the preset voltage, the MCU sends a control signal to switch to the charging circuit for power supply in the same manner as described above. The MCU automatically selects the best charging path according to the real-time voltage. Whether it is boosting, bucking or direct charging, it can ensure that the device is charged efficiently and safely, which not only improves the user experience and reduces the user's operating burden, but also improves the safety and reliability of the battery charging process, making the hand-cranked charging device more convenient and practical.

[0022] Thirdly, the utility model also includes a power bank and an emergency equipment component. The power bank is detachably connected to the battery and can supply power to the battery or be charged by the battery. The emergency equipment component includes one or more of a flashlight module, a radio module, and an ultraviolet disinfection lamp module. Through the integration of multiple emergency equipment components, the emergency response capability is significantly improved. For example, in emergency scenarios such as natural disasters, power outages, and field operations, the flashlight module provides instant lighting, the radio module allows users to obtain the latest disaster information and distress signals, and the ultraviolet disinfection lamp module is used for disinfection and sterilization. It can be flexibly configured and used in different emergency situations, further enhancing its practicality and adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the following is a brief introduction to the drawings required for use in the implementation mode. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0025] Figure 2 It is a structural diagram of the switch circuit in the utility model;

[0026] Figure 3 This is a circuit diagram of the hand-cranked power generation module in the utility model;

[0027] Figure 4 It is a structural diagram of the step-down circuit in the utility model;

[0028] Figure 5 It is a connection diagram of the switch circuit and the boost circuit of the utility model;

[0029] Figure 6 This is a schematic diagram of the connection between the switch circuit and the charging circuit of the utility model;

[0030] Figure 7 This is a circuit diagram of the MCU module of the utility model;

[0031] Figure 8 This is a circuit diagram of the power bank of the utility model;

[0032] Fig. 9 This is a circuit diagram of the radio module of the utility model;

[0033] Fig.10 This is a circuit diagram of the ultraviolet disinfection lamp module of the utility model;

[0034] Fig.11 This is a circuit diagram of the flashlight module of the utility model;

[0035] Fig.12 This is a circuit diagram of the LDO constant voltage output module of the utility model.

[0036] Reference numerals:

[0037] 10-battery; 20-hand crank charging module; 30-voltage regulation module; 40-MCU control module; 50-power bank; 70-LDO constant voltage output module;

[0038] 31- step-down circuit; 32- step-up circuit; 33- charging circuit; 34a- first switch circuit; 34b- second switch circuit;

[0039] 61- flashlight module; 62- radio module; 63- ultraviolet disinfection lamp module;

[0040] Q1-NPN transistor; Q2-PMOS transistor;

[0041] R3-protection resistor; R4-pull-down resistor; C1-capacitor; R1-voltage divider resistor 1; R2-voltage divider resistor 2. DETAILED DESCRIPTION

[0042] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the accompanying drawings:

[0043] In the description of the present invention, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. The orientation or position relationship indicated by the terms "portion", "side", "end", etc. is based on the orientation or position relationship shown in the drawings and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0044] like Figure 1 As shown, the present application provides an emergency device, including a battery 10 , a hand-crank charging module 20 and a voltage regulating module 30 , and the hand-crank charging module 20 supplies power to the battery 10 through the voltage regulating module 30 .

[0045] like Figure 3-Figure 6 As shown, the voltage regulating module 30 includes a step-down circuit 31, a step-up circuit 32 and a charging circuit 33. The input end of the step-down circuit 31 is connected to the voltage output end of the hand-crank charging module 20, and the output end is connected to the input end of the charging circuit 33; the input end of the step-up circuit 32 is connected to the voltage output end of the hand-crank charging module 20 through a first switch circuit 34a, and the output end is connected to the input end of the charging circuit 33; the input end of the charging circuit 33 is connected to the voltage output end of the hand-crank charging module 20 through a second switch circuit 34b, and the output end of the charging circuit 33 is connected to the battery 10.

[0046] In a specific embodiment, the hand-crank charging module 20 includes a miniature three-phase permanent magnet brushless hand-crank generator, the output end of which is connected to a three-phase bridge rectifier circuit to convert the three-phase AC voltage into a single-phase DC voltage, which is then filtered by an electrolytic capacitor EC1 and connected to a voltage regulating module 30. During use, the output voltage of the hand-crank generator changes with the hand-cranking speed. The preset standard voltage in this embodiment is 5V. If the output voltage of the hand-crank generator is greater than 5V, the battery 10 is powered by a step-down circuit 31 and a charging circuit 33. If the output voltage of the hand-crank generator is less than 5V, the battery 10 is powered by a step-up circuit 32 and a charging circuit 33. If the output voltage of the hand-crank generator is equal to 5V, the battery 10 is directly powered by a charging circuit 33. Furthermore, an anti-reverse current diode D1 is arranged between the step-down circuit 31 and the charging circuit 33, an anti-reverse current diode D2 is arranged between the step-up circuit 32 and the charging circuit 33, and an anti-reverse current diode D3 is arranged between the charging circuit 33 and the second switching circuit 34b. Isolation is achieved by the anti-reverse current diodes D1, D2 and D3, which can effectively prevent mutual interference between the step-down circuit 31 and the step-up circuit 32, and avoid mutual interference between the three charging paths.

[0047] like Figure 2 As shown, the first switch circuit 34a includes a first electrically controlled switch and a second electrically controlled switch. The first electrically controlled switch receives a control signal and controls the on-off of the second electrically controlled switch. The second electrically controlled switch is used to control the on-off of the boost circuit 32.

[0048] In a specific embodiment, the first electronically controlled switch is an NPN transistor Q1, and the second electronically controlled switch is an NMOS transistor. The base of the NPN transistor Q1 is connected to the control signal, the emitter is grounded, and the collector is connected to the gate of the PMOS transistor Q2; the source of the PMOS transistor Q2 is connected to the voltage output end of the hand-cranked charging module 20, and the drain is connected to the boost circuit 32; the base of the NPN transistor Q1 is connected in series with a protection resistor R3 to protect the base of the NPN transistor Q1 from being damaged by a large current, and a pull-down resistor R4 is connected between the base and the ground to keep the NPN transistor Q1 turned off when CONTROL1 does not send a high-level signal; a capacitor C1 is connected between the source and the gate of the PMOS transistor Q2 to filter high-frequency noise; a voltage divider resistor R1 is connected between the source and the collector of the NPN transistor Q1; a voltage divider resistor R2 is connected between the collector of the NPN transistor Q1 and the gate of the PMOS transistor Q2.

[0049] like Figure 3 and Figure 7 As shown, it also includes an MCU control module 40, which is electrically connected to the hand-cranked charging module 20 and sends a control signal to the boost circuit 32 or the charging circuit 33 according to the output voltage of the hand-cranked charging module 20.

[0050] like Figure 6 As shown, the structure of the second switch circuit 34 b is consistent with that of the first switch circuit 34 a , and controls the on and off of the charging circuit 33 .

[0051] In a specific embodiment, the output end of the hand-cranked generator is connected to a three-phase bridge rectifier circuit, and after being filtered by the electrolytic capacitor EC1, it is also connected to the VCC-ADC pin of the MCU control module 40 through a resistor network composed of R31, R32, and R33, which is used to detect the voltage output generated by the hand-cranked generator. When the detected voltage output is greater than 5V, no operation is performed, and the output voltage is supplied to the battery 10 through the step-down circuit 31 and the charging circuit 33; when the detected voltage output is less than 5V, the MCU control module 40 sends a high-level signal through CONTROL1 to turn on the NPN transistor Q1 of the first switch circuit 34a, and the current flows from VCC through the voltage-dividing resistor R1 and the collector-emitter of the NPN transistor Q1 are connected to the ground, pulling down the gate voltage of the PMOS transistor Q2. When the gate-source voltage of the PMOS transistor Q2 drops to a sufficiently low level, the PMOS transistor Q2 is turned on, so that the output end of the first switch circuit 34a is connected to VCC, that is, the boost circuit 32 is connected; when the detection voltage output is equal to 5V, the MCU control module 40 sends a high-level signal through CONTROL2, similar to the above-mentioned first switch circuit 34a, the NPN transistor Q3 is turned on, and then the PMOS transistor Q4 is turned on, so that the output end of the second switch circuit 34b is connected to VCC, that is, directly connected to the charging circuit 33.

[0052] More specifically, Figure 4 and Figure 6 As shown, the step-down circuit 31 includes a chip EA9206 and its peripheral circuits; Figure 5 and Figure 6 As shown, the boost circuit 32 includes a chip MT3540 and its peripheral circuits; Figure 6 As shown, the charging circuit 33 includes a chip TP4056-MS and its peripheral circuits.

[0053] like Figure 8 As shown, it also includes a power bank 50 and an emergency device assembly. The power bank 50 is pluggably electrically connected to the battery 10, and the battery 10 supplies power to the emergency device assembly.

[0054] In a specific embodiment, the power bank 50 is provided with a TYPE-C interface for charging and discharging. When the battery 10 is low on power, the power bank 50 can charge the battery 10 . When the power bank 50 is low on power, the battery 10 can charge the power bank 50 . The power bank 50 can also be disassembled and carried for use.

[0055] like Figure 1 , Figure 9-11 As shown, the emergency equipment components include but are not limited to any one or more combinations of a flashlight module 61 , a radio module 62 , and an ultraviolet disinfection lamp module 63 .

[0056] In a specific embodiment, the flashlight module 61 can adjust the brightness through a potentiometer and has three modes: strong light, weak light, and flashing; the radio supports global FM / AM frequency bands, has left and right channel amplifier modules, and an LDO constant voltage output module 70 is arranged between the battery 10 and the radio module 62 to provide a stable voltage for the radio module 62 and reduce noise and fluctuations; the ultraviolet disinfection lamp module 63 is electrically connected to the MCU control module 40, and is started or shut down by button control. The MCU control module 40 is also used to control the timing of the ultraviolet disinfection lamp module 63 to prevent burns caused by long-term use.

[0057] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An emergency device, characterized in that: It comprises a battery (10), a hand-cranked charging module (20) and a voltage regulating module (30), wherein the hand-cranked charging module (20) supplies power to the battery (10) via the voltage regulating module (30); The voltage regulating module (30) comprises a step-down circuit (31), a step-up circuit (32) and a charging circuit (33); the input end of the step-down circuit (31) is connected to the voltage output end of the hand-cranked charging module (20), and the output end is connected to the input end of the charging circuit (33); the input end of the step-up circuit (32) is connected to the voltage output end of the hand-cranked charging module (20) through a first switch circuit (34a), and the output end is connected to the input end of the charging circuit (33); the input end of the charging circuit (33) is connected to the voltage output end of the hand-cranked charging module (20) through a second switch circuit (34b), and the output end of the charging circuit (33) is connected to the battery (10); The first switch circuit (34a) comprises a first electrically controlled switch and a second electrically controlled switch, the first electrically controlled switch receives a control signal and controls the on and off of the second electrically controlled switch; the second electrically controlled switch is used to control the on and off of the boost circuit (32); the second switch circuit (34b) has the same structure as the first switch circuit (34a) and controls the on and off of the charging circuit (33).

2. An emergency device according to claim 1, characterized in that: The first electrically controlled switch is an NPN transistor (Q1), and the second electrically controlled switch is a PMOS transistor (Q2); the base of the NPN transistor (Q1) is connected to the control signal, the emitter is grounded, and the collector is connected to the gate of the PMOS transistor (Q2); the source of the PMOS transistor (Q2) is connected to the voltage output end of the hand-cranked charging module (20), and the drain is connected to the boost circuit (32); The base of the NPN transistor (Q1) is serially connected to a protection resistor (R3) and is also connected to a pull-down resistor (R4); A capacitor (C1) is connected between the source and the gate of the PMOS transistor (Q2), a voltage divider resistor (R1) is connected between the source and the collector of the NPN transistor (Q1); and a second voltage divider resistor (R2) is connected between the collector of the NPN transistor (Q1) and the gate of the PMOS transistor (Q2).

3. An emergency device as claimed in claim 1, characterized in that: The step-down circuit (31) comprises a chip EA9206 and its peripheral circuits, and an anti-backflow diode (D1) is provided between the step-down circuit (31) and the charging circuit (33).

4. An emergency device as claimed in claim 1, characterized in that: The boost circuit (32) comprises a chip MT3540 and its peripheral circuits, and an anti-reverse current diode (D2) is provided between the boost circuit (32) and the charging circuit (33).

5. An emergency device as claimed in claim 1, characterized in that: The charging circuit (33) comprises a chip TP4056-MS and its peripheral circuits, and an anti-reverse current diode (D3) is provided between the charging circuit (33) and the second switch circuit (34b).

6. An emergency device according to claim 1 or 2, characterized in that: It also includes an MCU control module (40), which is electrically connected to the hand-cranked charging module (20) and sends the control signal to the boost circuit (32) or the charging circuit (33) according to the output voltage of the hand-cranked charging module (20).

7. An emergency device as claimed in claim 1, characterized in that: It also includes a power bank (50) and an emergency equipment component, wherein the power bank (50) is pluggably electrically connected to the battery (10), and the battery (10) supplies power to the emergency equipment component.

8. An emergency device according to claim 7, characterized in that: The power bank (50) is provided with a TYPE-C interface for charging and discharging.

9. An emergency device as claimed in claim 7, characterized in that: The emergency equipment assembly includes any one or more combinations of a flashlight module (61), a radio module (62), and an ultraviolet disinfection lamp module (63).

10. An emergency device as claimed in claim 9, characterized in that: An LDO constant voltage output module (70) is provided between the battery (10) and the radio module (62).

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