CN217159369U - Emergency power utilization device with battery replacement function - Google Patents

Emergency power utilization device with battery replacement function Download PDF

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Publication number
CN217159369U
CN217159369U CN202221772991.1U CN202221772991U CN217159369U CN 217159369 U CN217159369 U CN 217159369U CN 202221772991 U CN202221772991 U CN 202221772991U CN 217159369 U CN217159369 U CN 217159369U
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resistor
field effect
effect transistor
channel
npn
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李航伟
解同喜
王向波
于宏博
张泽
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Hebei Landmark Electric Power Technology Co ltd
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Hebei Landmark Electric Power Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

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Abstract

The utility model relates to the technical field of portable power supplies, and provides an emergency power utilization device with a power conversion function, which comprises a power conversion box, wherein a storage battery placing area and a power conversion module are arranged in the power conversion box, the power conversion module comprises a storage battery interface, an alternating current power supply interface, a direct current power supply interface, a switch tube QS, a DC/AC conversion circuit, a DC/DC conversion circuit and a protection circuit, the storage battery interface is arranged in the battery placing area, the input end of the protection circuit is connected with the storage battery interface, the output end of the protection circuit is connected with the drain electrode of a grid N-channel switch tube QS of the switch tube QS and is connected with the anode of the storage battery interface, the source electrode of the switch tube QS is connected with the input end of the DC/AC conversion circuit and the input end of the DC/DC conversion circuit, the output end of the DC/AC conversion circuit is connected with the alternating current power supply interface, the output end of the DC/DC conversion circuit is connected with the direct current power supply interface, through above-mentioned technical scheme, the problem of outdoor power supply product weight among the prior art is big, carries inconvenience and charge in succession inconvenient has been solved.

Description

Emergency power utilization device with battery replacement function
Technical Field
The utility model relates to a portable power source technical field, it is specific, relate to an emergency power consumption device of electricity function is traded in area.
Background
Along with the improvement of people's quality of life, the quantity of outdoor tourism, camping increases rapidly, and people also improve thereupon to the quality requirement of outdoor activities, and the electrical equipment quantity that carries when outdoor trip increases, and the power consumption problem is difficult to solve for a moment. At present, the conventional outdoor power supply adopts a mode of DC/AC + storage battery interface to provide an emergency power supply, so that the problems of heavy weight and inconvenience in carrying exist, and the capacity of the storage battery interface is generally very small and cannot be used for a long time; in addition, the outdoor electric tube can be used only once, and can be used again only after being charged after the electric quantity is used up.
At present, along with take-out, the express delivery service industry's is the rapid rise, and the sales volume of electric motor car promotes in a large number, and the roadside has set up a lot of sharing battery cabinets, the trouble of the little brother of solution take-out and express delivery that can be very convenient for the brother. However, the existing shared battery cabinet has single use, is only used for an electric vehicle, cannot meet other outdoor requirements of people, and makes the resource utilization insufficient.
SUMMERY OF THE UTILITY MODEL
The utility model provides a take emergency power consumption device of electricity function of trading has solved among the prior art outdoor power supply product weight big, carries inconvenience and the inconvenient problem of charging in succession.
The technical scheme of the utility model as follows:
an emergency power utilization device with a power conversion function comprises a power conversion box, wherein a storage battery placing area and a power conversion module are arranged in the power conversion box, the power conversion module comprises a storage battery interface, an alternating current power supply interface, a direct current power supply interface, an N-channel switch tube QS, a DC/AC conversion circuit, a DC/DC conversion circuit and a protection circuit, the storage battery interface is arranged in the battery placing area, the input end of the protection circuit is connected with the storage battery interface, the output end of the protection circuit is connected with a grid electrode of the N-channel switch tube QS, the drain electrode of the N-channel switch tube QS is connected with the anode of the storage battery interface, the source electrode of the N-channel switch tube QS is connected with the input end of the DC/AC conversion circuit and the input end of the DC/DC conversion circuit, and the output end of the DC/AC conversion circuit is connected with the alternating current power supply interface, and the output end of the DC/DC conversion circuit is connected with the DC power supply interface.
Further, in the utility model discloses in U7 is put including resistance R37, resistance R38, rheostat RP2 and fortune to protection circuit, U7 is put to fortune homophase input end passes through the positive pole of battery interface is connected to resistance R38, U7 is put to fortune's inverting input end passes through VCC1 power is connected to rheostat RP2, U7 is put to fortune's inverting input end passes through resistance R37 ground connection, U7 is put to fortune output connection the grid of N channel switch tube QS.
Further, in the utility model the protection circuit still includes resistance R35, resistance R36, not gate U6, emitting diode LED5 and emitting diode LED6, the output that U7 was put to fortune is connected emitting diode LED 6's positive pole, emitting diode LED 6's negative pole passes through resistance R36 ground connection, the output that U7 was put to fortune is connected not gate U6's input, not gate U6's output is connected emitting diode LED 5's positive pole, emitting diode LED 5's negative pole passes through resistance R35 ground connection.
Further, the DC/AC converting circuit of the present invention includes a resistor R1, a capacitor C1, a resistor R2, a resistor R3, a capacitor C2, a resistor R4, an NPN transistor Q1, an NPN transistor Q2, an NPN transistor Q3, an NPN transistor Q4, a resistor R5, and a transformer T1, wherein a base of the NPN transistor Q1 is connected to the first end of the resistor R3, a collector of the NPN transistor Q1 is connected to the second end of the resistor R1 through the resistor R1, a collector of the NPN transistor Q1 is connected to the base of the NPN transistor Q1, an emitter of the NPN transistor Q1 is connected to the emitter of the NPN transistor Q1, a first end of the capacitor C1 is connected to the collector of the NPN transistor Q1, a second end of the capacitor C1 is connected to the base of the NPN transistor Q1 through the resistor R1, a base of the NPN transistor Q1 is connected to the second end of the resistor R1, a collector of the NPN transistor Q2 is connected to the second end of the resistor R3 through the resistor R4, a collector of the NPN transistor Q2 is connected to a base of the NPN transistor Q3, an emitter of the NPN transistor Q2 is grounded, a first end of the capacitor C2 is connected to a base of the NPN transistor Q1, a second end of the capacitor C2 is connected to a collector of the NPN transistor Q2, a collector of the NPN transistor Q3 is connected to the first input terminal of the transformer T1, an emitter of the NPN transistor Q3 is connected to an emitter of the NPN transistor Q4, a first end of the resistor R5 is connected to an emitter of the NPN transistor Q3, a second end of the resistor R5 is connected to a cathode of the battery interface, a cathode of the battery interface is grounded, an anode of the battery interface is connected to the second input terminal of the transformer T1, a collector of the NPN transistor Q4 is connected to the third input terminal of the transformer T1, the output end of the transformer T1 is connected with the AC power supply interface.
Further, in the present invention, the DC/DC conversion circuit includes a pre-step down circuit, a reference voltage circuit and a linear voltage stabilizing circuit, an input end of the pre-step down circuit is connected to the battery interface, an output end of the pre-step down circuit is connected to an input end of the reference voltage circuit, an output end of the reference voltage circuit is connected to an input end of the linear voltage stabilizing circuit, an output end of the linear voltage stabilizing circuit is used to connect to the DC power supply interface, the pre-step down circuit includes a resistor R6, a resistor R7, an N-channel fet Q5, an N-channel fet Q6, an N-channel fet Q7, an N-channel fet Q8, a P-channel fet Q9, an NPN-type triode Q10, an NPN-type triode Q11, an NPN-type triode Q12, an NPN-type triode Q13, a resistor R8, an N-channel fet Q14, an N-channel fet Q15, a P-channel fet Q19 and a capacitor C3, the negative electrode of the battery interface is grounded, the positive electrode of the battery interface is connected with the first end of the resistor R6, the second end of the resistor R6 is connected with the collector of the NPN-type triode Q10 through the resistor R7, the collector of the NPN-type triode Q10 is connected with the base of the NPN-type triode Q10, the collector of the NPN-type triode Q10 is connected with the gate of the P-channel fet Q9, the base of the NPN-type triode Q10 is connected with the base of the NPN-type triode Q11, the emitter of the NPN-type triode Q10 is connected with the collector of the NPN-type triode Q12, the emitter of the NPN-type triode Q10 is connected with the base of the NPN-type triode Q13, the base of the NPN-type triode Q12 is connected with the emitter of the NPN-type triode Q11, the emitter of the NPN-type triode Q12 is connected with ground, and the source of the N-channel fet Q5 is connected with the positive electrode of the battery interface, the gate of the N-channel fet Q5 is connected to the gate of the N-channel fet Q6, the drain of the N-channel fet Q5 is connected to the source of the N-channel fet Q7, the gate of the N-channel fet Q7 is connected to the gate of the N-channel fet Q8, the drain of the N-channel fet Q7 is connected to the drain of the P-channel fet Q9, the source of the P-channel fet Q9 is connected to the collector of the NPN-type triode Q11, the emitter of the NPN-type triode Q11 is connected to the collector of the NPN-type triode Q13, the emitter of the triode Q13 is connected to ground via the resistor R8, the source of the N-channel fet Q6 is connected to the positive electrode of the battery interface, the drain of the N-channel fet Q6 is connected to the source of the N-channel fet Q8, the drain of the N-channel fet Q8 is connected to the source of the N-channel fet Q14, the grid connection of N channel field effect transistor Q14 the drain electrode of N channel field effect transistor Q14, the drain electrode of N channel field effect transistor Q14 is connected the source electrode of N channel field effect transistor Q15, the drain electrode of N channel field effect transistor Q15 is connected the drain electrode of N channel field effect transistor Q15, the drain electrode of N channel field effect transistor Q15 is ground connection, the gate connection of P channel field effect transistor Q19 the source electrode of N channel field effect transistor Q14, the positive pole of battery interface is connected to the drain electrode of P channel field effect transistor Q19, the source electrode of P channel field effect transistor Q19 passes through electric capacity C3 connects ground connection, the source electrode of P channel field effect transistor Q19 is connected the input of reference voltage circuit.
Further, the reference voltage circuit of the present invention comprises an N-channel fet Q20, an N-channel fet Q21, an N-channel fet Q22, an N-channel fet Q23, an N-channel fet Q24, an N-channel fet Q25, a P-channel fet Q26, a P-channel fet Q27, a P-channel fet Q28, a P-channel fet Q29, a P-channel fet Q30, a PNP triode Q31, a PNP triode Q32, a PNP triode Q33, a capacitor C4, a resistor R9, and a resistor R10, wherein a source of the N-channel fet Q20 is connected to the output terminal of the pre-step-down circuit, a gate of the N-channel fet Q20 is connected to a gate of the N-channel fet Q22, a gate of the N-channel fet Q20 is connected to a source of the N-channel fet Q21, a gate of the N-channel fet Q20 is connected to a gate of the N-channel fet Q25, the drain of the N-channel fet Q20 is connected to the source of the N-channel fet Q21, the gate of the N-channel fet Q21 is connected to the gate of the N-channel fet Q23, the gate of the N-channel fet Q21 is connected to the gate of the N-channel fet Q24, the gate of the N-channel fet Q21 is connected to the drain of the P-channel fet Q27, the drain of the N-channel fet Q21 is connected to the drain of the P-channel fet Q27, the drain of the N-channel fet Q21 is connected to the drain of the P-channel fet Q26, the gate of the P-channel fet Q26 is connected to the output of the pre-step-down circuit, the source of the P-channel fet Q26 is grounded via the capacitor C4, the gate of the P-channel fet Q27 is connected to the gate of the P-channel fet Q30, the source of the P-channel fet Q27 is connected to the drain of the P-channel fet Q28, the gate of the P-channel fet Q28 is connected to the gate of the P-channel fet Q29, the source of the P-channel fet Q28 is connected to the emitter of the PNP-type triode Q31, the collector of the PNP-type triode Q31 is grounded, the base of the PNP-type triode Q31 is grounded, the source of the N-channel fet Q22 is connected to the source of the N-channel fet Q20, the drain of the N-channel fet Q22 is connected to the source of the N-channel fet Q23, the drain of the N-channel fet Q23 is connected to the drain of the P-channel fet Q30, the source of the P-channel fet Q30 is connected to the drain of the P-channel fet Q29, the source of the P-channel fet Q29 is connected to the emitter of the PNP-type triode Q32 via the resistor R9, the base of the PNP-type triode Q32 is grounded, and the collector of the PNP-type triode Q32 is grounded, the source electrode of the N-channel field effect transistor Q25 is connected with the source electrode of the N-channel field effect transistor Q20, the drain electrode of the N-channel field effect transistor Q25 is connected with the source electrode of the N-channel field effect transistor Q24, the drain electrode of the N-channel field effect transistor Q24 is connected with the input end of the linear voltage stabilizing circuit, the drain electrode of the N-channel field effect transistor Q24 is connected with the emitting electrode of the PNP type triode Q33 through the resistor R10, the base electrode of the PNP type triode Q33 is grounded, and the collector electrode of the PNP type triode Q33 is grounded.
Further, the linear voltage stabilizing circuit of the present invention comprises an operational amplifier U1, an N channel fet Q34, an N channel fet Q35, a P channel fet Q36, a resistor R11, a resistor R12, and a resistor R13, wherein the non-inverting input terminal of the operational amplifier U1 is connected to the output terminal of the reference voltage circuit, the output terminal of the operational amplifier U1 is connected to the gate of the P channel fet Q36, the source of the P channel fet Q36 is grounded, the drain of the P channel fet Q36 is connected to the drain of the N channel fet Q34, the source of the N channel fet Q34 is connected to the positive electrode of the battery interface, the gate of the N channel fet Q34 is connected to the gate of the N channel fet Q35, the gate of the N channel fet Q34 is connected to the drain of the P channel fet Q36, the source of the N channel fet Q35 is connected to the source of the N channel fet Q34, the drain electrode of N channel field effect transistor Q35 is used for connecting the direct current power supply interface, the drain electrode of N channel field effect transistor Q35 passes through resistance R11 connects the first end of resistance R12, the second end ground connection of resistance R12, the first end of resistance R12 is connected the inverting input end of fortune amplifier U1, the first end of resistance R13 is connected the drain electrode of N channel field effect transistor Q35, the second end ground connection of resistance R13.
Furthermore, the present invention further includes a remaining power display circuit, the remaining power display circuit includes a resistor R18, a resistor R19, a resistor R24, a resistor R29, a first power display branch, a second power display branch, a third power display branch and a fourth power display branch, the first end of the resistor R18 is connected to the Vref reference voltage, the second end of the resistor R18 is connected to the input end of the first power display branch, the second end of the resistor R18 is connected to the first end of the resistor R19, the second end of the resistor R19 is connected to the input end of the second power display branch, the second end of the resistor R19 is connected to the first end of the resistor R24, the second end of the resistor R24 is connected to the input end of the third power display branch, the second end of the resistor R24 is connected to the first end of the resistor R29, the second end of the resistor R29 is connected to the input end of the fourth power display branch, the second end of the resistor R29 is connected to ground.
Further, in the utility model discloses in the second electric quantity display branch road the circuit structure of third electric quantity display branch road with the fourth electric quantity display branch road with first electric quantity display branch road is the same, first electric quantity display branch road includes that the fortune is put U2, resistance R14, resistance R15, resistance R16, resistance R17 and electric quantity pilot lamp LED1, the non inverting input end of fortune is put U2 and is passed through the positive pole that battery interface is connected to resistance R14, the non inverting input end of fortune is put U2 passes through resistance R15 ground connection, the inverting input end of fortune is put U2 is connected the second end of resistance R18, the output of fortune is put U2 passes through resistance R16 connects the non inverting input end of fortune is put U2, the output of fortune is put U2 passes through resistance R17 connects the positive pole of electric quantity pilot lamp LED1, the negative pole ground connection of electric quantity pilot lamp LED 1.
The utility model discloses a theory of operation and beneficial effect do:
the utility model discloses in, trade the inside battery of battery box and place the district and be used for installing shared battery, shared battery and battery interface connection, through DC AC converting circuit with the DC power supply of battery change alternating current power supply into, outwards transmit electricity from the alternating current power supply interface, through DC AC converting circuit with the DC power supply of battery change the little voltage DC power supply that can supply electronic equipment to use into, outwards transmit electricity from the direct current power supply interface. The utility model provides an emergency power consumption device is unset and sets up the battery, has reduced the volume weight of equipment to a certain extent to when battery power runs out, just can realize the continuation of the journey function of outdoor power consumption through changing the shared battery, solved the problem that current emergency power supply can not continuous use, satisfy the needs of people's trip, camping.
The utility model discloses a power state of protection circuit real-time supervision battery kneck, when the power of sharing battery output is unusual, protection circuit drive N channel switch pipe QS ends, stops outwards transmitting electricity, has protected sharing battery and power conversion module's safety in utilization.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic block diagram of the present invention;
fig. 2 is a circuit diagram of the protection circuit of the present invention;
FIG. 3 is a circuit diagram of the DC/AC conversion circuit of the present invention;
FIG. 4 is a circuit diagram of the pre-step-down circuit of the present invention;
fig. 5 is a circuit diagram of the reference voltage circuit of the present invention;
FIG. 6 is a circuit diagram of the linear voltage regulator circuit of the present invention;
fig. 7 is a circuit diagram of the remaining power display circuit of the present invention;
fig. 8 is a schematic view of the present invention.
In the drawings: 1. the power conversion box 2, the power conversion module 3, the storage battery placing area 4, the storage battery 5, the alternating current power supply interface 6 and the direct current power supply interface.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive work, are related to the scope of the present invention.
Example 1
As shown in fig. 1, the embodiment provides an emergency electric device with a power conversion function, which includes a power conversion box, a storage battery placement area and a power conversion module are disposed in the power conversion box, the power conversion module includes a storage battery interface, an ac power supply interface, and a dc power supply interface, the battery protection circuit comprises an N-channel switching tube QS, a DC/AC conversion circuit, a DC/DC conversion circuit and a protection circuit, wherein a storage battery interface is arranged in a battery placement area, the input end of the protection circuit is connected with the storage battery interface, the output end of the protection circuit is connected with the grid electrode of the N-channel switching tube QS, the drain electrode of the N-channel switching tube QS is connected with the anode of the storage battery interface, the source electrode of the N-channel switching tube QS is connected with the input end of the DC/AC conversion circuit and the input end of the DC/DC conversion circuit, the output end of the DC/AC conversion circuit is connected with an alternating current power supply interface, and the output end of the DC/DC conversion circuit is connected with a direct current power supply interface.
In this embodiment, the storage battery may be a shared storage battery in a shared charging cabinet, the storage battery is connected to a storage battery interface inside the battery changing box, the DC/AC conversion circuit is used for converting a storage battery voltage into a 220V alternating current voltage, the DC/DC conversion circuit is used for converting a storage battery voltage into a direct current voltage for charging the electronic device, when people need to charge the electronic device outdoors through the direct current power supply interface, and when people need to cook an induction cooker, an electric cooker or other emergency appliances outdoors, an emergency can be performed through the alternating current power supply interface;
when the storage battery is discharged normally, the protection circuit controls the N-channel switch tube QS to be connected with the DC/AC conversion circuit and the connection between the DC/DC conversion circuit and the storage battery, when the storage battery is over-discharged, the protection circuit controls the N-channel switch tube QS to be disconnected with the DC/AC conversion circuit and the connection between the DC/DC conversion circuit and the storage battery, and the protection circuit plays a role in protecting the storage battery.
As shown in fig. 2, the protection circuit in this embodiment includes a resistor R37, a resistor R38, a varistor RP2, and an operational amplifier U7, a non-inverting input terminal of the operational amplifier U7 is connected to an anode of the battery interface through a resistor R38, an inverting input terminal of the operational amplifier U7 is connected to a VCC1 power supply through a varistor RP2, an inverting input terminal of the operational amplifier U7 is grounded through a resistor R37, and an output terminal of the operational amplifier U7 is connected to a gate of an N-channel switching transistor QS.
In this embodiment, the operational amplifier U7 is used to detect the real-time voltage of the battery during the discharging process, and compare the real-time voltage with the set voltage, and under the normal operating condition, the operational amplifier U7 outputs a high level.
When the voltage of the storage battery is reduced to a certain value, the capacity of the storage battery is completely discharged, and at the moment, if the lithium ion battery is continuously discharged to the load, the storage battery is permanently damaged. Therefore, in the discharging process of the storage battery, when the voltage of the storage battery is lower than a set value, the operational amplifier U7 is overturned, the output is converted from high level to low level, the QS (on/off) of the N-channel switch tube is switched from on to off, and a discharging loop is cut off, so that the storage battery can not discharge the load any more, and the over-discharging protection effect is achieved.
As shown in fig. 2, the protection circuit in this embodiment further includes a resistor R35, a resistor R36, a not gate U6, a light emitting diode LED5, and a light emitting diode LED6, an output terminal of the operational amplifier U7 is connected to an anode of the light emitting diode LED6, a cathode of the light emitting diode LED6 is grounded through the resistor R36, an output terminal of the operational amplifier U7 is connected to an input terminal of the not gate U6, an output terminal of the not gate U6 is connected to an anode of the light emitting diode LED5, and a cathode of the light emitting diode LED5 is grounded through the resistor R35.
Under the normal working state, the operational amplifier U7 outputs high level, the NOT gate U6 outputs low level, so the light emitting diode LED6 emits green light, the light emitting diode LED5 is not bright, the N-channel switch tube QS is conducted, and the storage battery can freely discharge at the moment; when the voltage of the storage battery is discharged, the operational amplifier U7 is turned over, the output is converted from high level to low level, and the NOT gate U6 outputs high level, so that the light-emitting diode LED6 is not bright, and the light-emitting diode LED5 emits red light; whether the storage battery has faults in the discharging process can be judged by judging the colors of light emitted by the light emitting diodes LED5 and LED 6.
As shown in fig. 3, in this embodiment, the DC/AC converting circuit includes a resistor R1, a capacitor C1, a resistor R2, a resistor R3, a capacitor C2, a resistor R4, an NPN transistor Q1, a resistor R1 and a transformer T1, wherein a base of NPN transistor Q1 is connected to a first end of resistor R1, a collector of NPN transistor Q1 is connected to a second end of resistor R1 through resistor R1, a collector of NPN transistor Q1 is connected to a base of NPN transistor Q1, an emitter of NPN transistor Q1 is connected to an emitter of NPN transistor Q1, a first end of capacitor C1 is connected to a collector of NPN transistor Q1, a second end of capacitor C1 is connected to a base of NPN transistor Q1, a base of NPN transistor Q1 is connected to a second end of resistor R1 through resistor R1, a collector of transistor Q1 is connected to a second end of NPN transistor 1 through resistor 1, a collector of the NPN transistor Q2 is connected to a base of the NPN transistor Q3, an emitter of the NPN transistor Q2 is grounded, a first end of the capacitor C2 is connected to a base of the NPN transistor Q1, a second end of the capacitor C2 is connected to a collector of the NPN transistor Q2, a collector of the NPN transistor Q3 is connected to a first input terminal of the transformer T1, an emitter of the NPN transistor Q3 is connected to an emitter of the NPN transistor Q4, a first end of the resistor R5 is connected to an emitter of the NPN transistor Q3, a second end of the resistor R5 is connected to a negative terminal of the battery interface, a negative terminal of the battery interface is grounded, an anode of the battery interface is connected to a second input terminal of the transformer T1, a collector of the NPN transistor Q4 is connected to a third input terminal of the transformer T1, and an output terminal of the transformer T1 is connected to the ac power supply interface.
In this embodiment, a multivibrator is composed of an NPN transistor Q1, an NPN transistor Q2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, and a capacitor C2, and generates a 50Hz oscillation signal, the oscillation frequency of the multivibrator is changed by changing the resistance values of the resistor R2 and the resistor R3 or changing the capacitance values of the capacitor C1 and the capacitor C2, so as to change the frequency of the alternating current, the oscillation signal output by the multivibrator respectively turns on and off the NPN transistor Q3 and the NPN transistor Q4, and due to the switching action of the NPN transistor Q3 and the NPN transistor Q4, a rectangular alternating current voltage with a frequency of about 50Hz is formed at the primary side of the transformer T1, and an alternating current voltage of about 220V is obtained at the secondary side of the transformer T1, so that the alternating current can be used for outdoor emergency.
As shown in fig. 4, in this embodiment, the DC/DC conversion circuit includes a pre-step-down circuit, a reference voltage circuit, and a linear voltage regulator circuit, an input end of the pre-step-down circuit is connected to the battery interface, an output end of the pre-step-down circuit is connected to an input end of the reference voltage circuit, an output end of the reference voltage circuit is connected to an input end of the linear voltage regulator circuit, an output end of the linear voltage regulator circuit is used for connecting to the DC power supply interface, the pre-step-down circuit includes a resistor R6, a resistor R7, an N-channel fet Q5, an N-channel fet Q6, an N-channel fet Q7, an N-channel fet Q8, a P-channel fet Q9, an NPN-type triode Q10, an NPN-type triode Q11, an NPN-type triode Q12, an NPN-type triode Q13, a resistor R8, an N-channel fet Q14, an N-channel fet Q15, a P-channel fet Q19, and a capacitor C3, a negative electrode of the battery interface is grounded, the positive electrode of the storage battery interface is connected with a first end of a resistor R6, a second end of the resistor R6 is connected with a collector electrode of an NPN type triode Q10 through a resistor R7, a collector electrode of the NPN type triode Q10 is connected with a base electrode of an NPN type triode Q10, a collector electrode of the NPN type triode Q10 is connected with a grid electrode of a P channel field effect transistor Q9, a base electrode of the NPN type triode Q10 is connected with a base electrode of an NPN type triode Q11, an emitter electrode of the NPN type triode Q10 is connected with a collector electrode of an NPN type triode Q12, an emitter electrode of the NPN type triode Q10 is connected with a base electrode of an NPN type triode Q13, a base electrode of an NPN type triode Q12 is connected with an emitter electrode of the NPN type triode Q11, an emitter electrode of the NPN type triode Q12 is connected with the ground, a source electrode of the N channel field effect transistor Q5 is connected with the positive electrode of the storage battery interface, a grid electrode of an N channel field effect transistor Q5 is connected with a grid electrode of an N channel field effect transistor Q6, a drain electrode of an N channel field effect transistor Q5 is connected with a source electrode of an N channel field effect transistor Q7, the grid of the N-channel field effect transistor Q7 is connected with the grid of the N-channel field effect transistor Q8, the drain of the N-channel field effect transistor Q7 is connected with the drain of the P-channel field effect transistor Q9, the source of the P-channel field effect transistor Q9 is connected with the collector of the NPN type triode Q11, the emitter of the NPN type triode Q11 is connected with the collector of the NPN type triode Q13, the emitter of the triode Q13 is connected with the ground through a resistor R8, the source of the N-channel field effect transistor Q6 is connected with the anode of the storage battery interface, the drain of the N-channel field effect transistor Q6 is connected with the source of the N-channel field effect transistor Q8, the drain of the N-channel field effect transistor Q8 is connected with the source of the N-channel field effect transistor Q14, the grid of the N-channel field effect transistor Q14 is connected with the drain of the N-channel field effect transistor Q14, the drain of the N-channel field effect transistor Q14 is connected with the source of the N-channel field effect transistor Q15, the grid of the N-channel field effect transistor Q15 is connected with the drain of the N-channel field effect transistor Q15, the drain electrode of the N-channel field effect transistor Q15 is connected with the ground, the grid electrode of the P-channel field effect transistor Q19 is connected with the source electrode of the N-channel field effect transistor Q14, the drain electrode of the P-channel field effect transistor Q19 is connected with the anode of the storage battery interface, the source electrode of the P-channel field effect transistor Q19 is connected with the ground through a capacitor C3, and the source electrode of the P-channel field effect transistor Q19 is connected with the input end of the reference voltage circuit.
When the electronic equipment is charged outdoors, the electronic equipment cannot be directly charged due to overhigh voltage from the storage battery, and the voltage of the storage battery is required to be processed by using the voltage reduction and voltage stabilization circuit, so that the voltage of the storage battery is changed into lower direct current voltage;
the pre-reduction circuit is required to reduce the voltage of the storage battery to a range where the reference voltage circuit and the linear voltage stabilizing circuit can normally work by using the pre-reduction circuit, so that the stable work of the circuit is guaranteed, the NPN type triode Q10, the NPN type triode Q11, the NPN type triode Q12, the NPN type triode Q13, the resistor R6, the resistor R7 and the resistor R8 form a bias circuit, the resistor R6 and the resistor R7 and the P-channel field effect transistor Q9 form a source following structure, so that the collector of the NPN type triode Q2 is prevented from being broken down due to the rise of the voltage, and the collector voltage of the NPN type triode Q2 can be guaranteed to be still lower than the breakdown voltage of the NPN type triode Q12 when the voltage of the storage battery is higher by reasonably setting the resistance values of the resistor R6 and the resistor R7. The N-channel field effect transistor Q5, the N-channel field effect transistor Q6, the N-channel field effect transistor Q7 and the N-channel field effect transistor Q8 form a cascode current mirror, and the bias circuit current is mirrored and flows through the N-channel field effect transistor Q14 and the N-channel field effect transistor Q15. The N-channel field effect transistor Q14, the N-channel field effect transistor Q15 and the P-channel field effect transistor Q19 form a source follower circuit, and pre-reduction voltage V1 is generated at the source electrode of the P-channel field effect transistor Q19.
As shown in fig. 5, the reference voltage circuit in this embodiment includes an N-channel fet Q20, an N-channel fet Q21, an N-channel fet Q22, an N-channel fet Q23, an N-channel fet Q24, an N-channel fet Q25, a P-channel fet Q26, a P-channel fet Q27, a P-channel fet Q28, a P-channel fet Q29, a P-channel fet Q30, a PNP transistor Q31, a PNP transistor Q32, a PNP transistor Q33, a capacitor C4, a resistor R9, and a resistor R10, a source of the N-channel fet Q20 is connected to the output terminal of the pre-step-down circuit, a gate of the N-channel fet Q20 is connected to the gate of the N-channel fet Q22, a gate of the N-channel fet Q20 is connected to the source of the N-channel fet Q21, a gate of the N-channel fet Q21 is connected to the source of the N-channel fet Q21, a drain of the N-channel fet Q21 is connected to the source of the N-channel fet 21, the grid of an N-channel field effect transistor Q21 is connected with the grid of an N-channel field effect transistor Q23, the grid of the N-channel field effect transistor Q21 is connected with the grid of an N-channel field effect transistor Q24, the grid of the N-channel field effect transistor Q21 is connected with the drain of a P-channel field effect transistor Q27, the drain of the N-channel field effect transistor Q21 is connected with the drain of a P-channel field effect transistor Q27, the drain of the N-channel field effect transistor Q21 is connected with the drain of a P-channel field effect transistor Q26, the grid of the P-channel field effect transistor Q26 is connected with the output end of the pre-step-down circuit, the source of the P-channel field effect transistor Q26 is grounded through a capacitor C4, the grid of the P-channel field effect transistor Q27 is connected with the grid of a P-channel field effect transistor Q30, the source of the P-channel field effect transistor Q27 is connected with the drain of a P-channel field effect transistor Q28, the grid of the P-channel field effect transistor Q28 is connected with the grid of a P-channel field effect transistor Q29, the source of a P-channel field effect transistor Q28 is connected with the emitter of a PNP-type triode Q31, the collector of PNP triode Q31 is grounded, the base of PNP triode Q31 is grounded, the source of N channel FET Q22 is connected to the source of N channel FET Q20, the drain of N channel FET Q22 is connected to the source of N channel FET Q23, the drain of N channel FET Q23 is connected to the drain of P channel FET Q30, the source of P channel FET Q30 is connected to the drain of P channel FET Q29, the source of P channel FET Q29 is connected to the emitter of PNP triode Q32 through resistor R9, the base of PNP triode Q32 is grounded, the collector of PNP triode Q32 is grounded, the source of N channel FET Q25 is connected to the source of N channel FET Q20, the drain of N channel FET Q25 is connected to the source of N channel FET Q24, the drain of N channel FET Q24 is connected to the input of linear voltage regulator, the emitter of N channel FET Q24 is connected to the PNP FET Q33 through resistor R10, the base of the PNP transistor Q33 is grounded, and the collector of the PNP transistor Q33 is grounded.
Most mobile devices today are charged at 5V, and in order to generate a 5V regulated output power, a reference voltage that varies precisely and with little variation with temperature and external input voltage is required. The P-channel field effect transistor Q26 and the capacitor C4 form a starting circuit, and the circuit can work normally after being powered on. The current mirror of the cascode structure formed by the N-channel field effect transistors Q20-Q25 enables currents of all branches flowing through the PNP type triode Q31, the PNP type triode Q32 and the PNP type triode Q33 to be equal, and the P-channel field effect transistors Q27-Q30 are voltage clamping circuits formed by the cascode structure. The cascode structure has a good shielding effect, the source electrodes of the P-channel field effect transistor Q28 and the P-channel field effect transistor Q29 can be well guaranteed to be equal, the PNP type triode Q31, the PNP type triode Q32 and the resistor R9 form a reference current source which is in direct proportion to absolute temperature, a proper zero temperature coefficient can be obtained, a cascode structure is selected by a current mirror in the circuit, high output impedance can be achieved by selecting proper channel length, the change of the voltage change of the storage battery to the output of a reference voltage circuit can be well shielded, the power supply rejection ratio of the circuit can be effectively improved, and the stability of output voltage is improved.
As shown in fig. 6, the linear voltage stabilizing circuit in this embodiment includes an operational amplifier U1, an N-channel fet Q34, an N-channel fet Q35, a P-channel fet Q36, a resistor R11, a resistor R12, and a resistor R13, a non-inverting input terminal of the operational amplifier U1 is connected to an output terminal of the reference voltage circuit, an output terminal of the operational amplifier U1 is connected to a gate of the P-channel fet Q36, a source of the P-channel fet Q36 is grounded, a drain of the P-channel fet Q36 is connected to a drain of the N-channel fet Q34, a source of the N-channel fet Q34 is connected to an anode of the battery interface, a gate of the N-channel fet Q34 is connected to a gate of the N-channel fet Q35, a gate of the N-channel fet Q34 is connected to a drain of the P-channel fet Q36, a source of the N-channel fet Q35 is connected to a source of the N-channel fet Q34, a drain of the N-channel fet Q35 is connected to the dc power supply interface, the drain electrode of the N-channel field effect transistor Q35 is connected with the first end of the resistor R12 through the resistor R11, the second end of the resistor R12 is grounded, the first end of the resistor R12 is connected with the inverting input end of the operational amplifier U1, the first end of the resistor R13 is connected with the drain electrode of the N-channel field effect transistor Q35, and the second end of the resistor R13 is grounded.
The linear voltage regulating circuit is used for generating stable 5V output voltage when different load currents are supplied. The circuit is a negative feedback circuit generated by an operational amplifier U1, the output of a reference voltage circuit is used as the voltage of the non-inverting input end of an operational amplifier U1, the voltage divided by a resistor R2 is used as the voltage of the inverting input end of an operational amplifier U1, the voltage of the non-inverting input end of the operational amplifier U1 is the same as the voltage of the inverting input end of an operational amplifier U1 by the clamping action of the operational amplifier, stable output voltage can be generated at the output end by adjusting the ratio of R11 to a resistor R12, an N-channel field effect transistor Q34 and a P-channel field effect transistor Q36 form a second-stage amplifying circuit, an N-channel field effect transistor Q35, a resistor R11, a resistor R12 and a capacitor C5 form an output branch, and the capacitor C5 can filter the alternating voltage at the output voltage end, so that the ripple interference of the ripple voltage on the charging of the electronic equipment is reduced.
As shown in fig. 7, the present embodiment further includes a remaining power display circuit, where the remaining power display circuit includes a resistor R18, a resistor R19, a resistor R24, a resistor R29, a first power display branch, a second power display branch, a third power display branch, and a fourth power display branch, a first end of the resistor R18 is connected to the Vref reference voltage, a second end of the resistor R18 is connected to the input end of the first power display branch, a second end of the resistor R18 is connected to the first end of the resistor R19, a second end of the resistor R19 is connected to the input end of the second power display branch, a second end of the resistor R19 is connected to the first end of the resistor R24, a second end of the resistor R24 is connected to the input end of the third power display branch, a second end of the resistor R24 is connected to the first end of the resistor R29, a second end of the resistor R29 is connected to the input end of the fourth power display branch, and a second end of the resistor R29 is grounded.
Resistance R18, resistance R19, resistance R24 and resistance R29 are first electric quantity display branch road, second electric quantity display branch road, third electric quantity display branch road and fourth electric quantity display branch road respectively and provide reference voltage, and actual circuit can adopt a plurality of fortune to put and form multistage indicating circuit as required, and the reference voltage value that every fortune was put sets up according to the performance of battery.
As shown in fig. 7, the circuit structures of the second power display branch, the third power display branch and the fourth power display branch in this embodiment are the same as those of the first power display branch, the first power display branch includes an operational amplifier U2, a resistor R14, a resistor R15, a resistor R16, a resistor R17 and a power indicator LED1, a non-inverting input terminal of the operational amplifier U2 is connected to the positive electrode of the battery interface through the resistor R14, a non-inverting input terminal of the operational amplifier U2 is grounded through the resistor R15, an inverting input terminal of the operational amplifier U2 is connected to the second end of the resistor R18, an output terminal of the operational amplifier U2 is connected to a non-inverting input terminal of the operational amplifier U2 through the resistor R16, an output terminal of the operational amplifier U2 is connected to the anode of the power indicator LED1 through the resistor R17, and a cathode of the power indicator LED1 is grounded.
The circuit consists of an operational amplifier, a voltage division circuit and a comparison circuit. The non-inverting input end of the operational amplifier U2 is connected with a storage battery voltage, the inverting input end is a reference voltage, the storage battery voltage is divided by a resistor R14 and a resistor R15 and then sent to the non-inverting input end of the operational amplifier U2, when the storage battery capacity is sufficient, the non-inverting input end voltage of the operational amplifier U2 is higher than or equal to the inverting input end voltage, the output voltage of the operational amplifier U2 is high level, the electric quantity indicator light LED1 emits light, when the battery capacity is insufficient, the non-inverting input end voltage of the operational amplifier U2 is lower than the inverting input end voltage, the output voltage of the operational amplifier U2 is low level, and the electric quantity indicator light LED1 is turned off.
In this embodiment, 4 sections of the remaining electric quantity display circuit are provided, and the circuit adopts 4 paths of remaining electric quantity display circuits. The operational amplifiers U2-U5 form 4 comparator circuits with different reference voltages, and respectively indicate different residual electric quantity values. The circuit parameters are designed according to the performance of the storage battery. The electric quantity indicating lamps LED 1-LED 4 are used for indicating different electric quantity intervals, the assumed full range of discharging is 100%, when the electric quantity indicating lamps LED 1-LED 4 are fully turned on to indicate that the electric quantity of the storage battery is between 75% and 100%, when the electric quantity indicating lamps LED 2-LED 4 are turned on and the electric quantity indicating lamps LED1 are turned off to indicate that the electric quantity of the storage battery is between 50% and 75%, when the electric quantity indicating lamps LED 3-LED 4 are turned on and the electric quantity indicating lamps LED 1-LED 2 are turned off to indicate that the electric quantity of the storage battery is between 25% and 50%, when the electric quantity indicating lamps LED4 are turned on and the electric quantity indicating lamps LED 1-LED 3 are turned off to indicate that the electric quantity of the storage battery is between 0% and 25%, the electric quantity indicating lamps LED 1-LED 3 are set to be green, the electric quantity indicating lamps LED4 are set to be red, and when only the electric quantity indicating lamps LED4 are left, the electric quantity of the storage battery is too low, and the storage battery needs to be replaced.
As shown in fig. 8, the utility model discloses when specifically using, integrated one trades electronic box 1, trades electronic box inside can set up a plurality of batteries and place district 3, and every battery is placed and all is equipped with the battery interface in the district 3, and when sharing battery 4 put into the battery and place the district, the power output end and the battery interface connection of sharing battery exported direct current and alternating current through power conversion module 2.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The emergency electric device with the battery replacement function is characterized by comprising an electric replacement box, wherein a storage battery placement area and a power supply conversion module are arranged in the electric replacement box, the power supply conversion module comprises a storage battery interface, an alternating current power supply interface, a direct current power supply interface, an N-channel switching tube QS, a DC/AC conversion circuit, a DC/DC conversion circuit and a protection circuit, the storage battery interface is arranged in the battery placement area, the input end of the protection circuit is connected with the storage battery interface, the output end of the protection circuit is connected with the grid electrode of the N-channel switching tube QS, the drain electrode of the N-channel switching tube QS is connected with the anode of the storage battery interface, the source electrode of the N-channel switching tube QS is connected with the input end of the DC/AC conversion circuit and the input end of the DC/DC conversion circuit, and the output end of the DC/AC conversion circuit is connected with the alternating current power supply interface, and the output end of the DC/DC conversion circuit is connected with the DC power supply interface.
2. The emergency electric device with the battery swapping function of claim 1, wherein the protection circuit comprises a resistor R37, a resistor R38, a varistor RP2 and an operational amplifier U7, a non-inverting input terminal of the operational amplifier U7 is connected to the positive electrode of the battery interface through the resistor R38, an inverting input terminal of the operational amplifier U7 is connected to the VCC1 power supply through the varistor RP2, an inverting input terminal of the operational amplifier U7 is connected to the ground through the resistor R37, and an output terminal of the operational amplifier U7 is connected to the gate of the N-channel switching transistor QS.
3. The emergency power utilization apparatus with a power conversion function of claim 2, wherein the protection circuit further comprises a resistor R35, a resistor R36, a not gate U6, a light emitting diode LED5 and a light emitting diode LED6, an output terminal of the operational amplifier U7 is connected to an anode of the light emitting diode LED6, a cathode of the light emitting diode LED6 is grounded via the resistor R36, an output terminal of the operational amplifier U7 is connected to an input terminal of the not gate U6, an output terminal of the not gate U6 is connected to an anode of the light emitting diode LED5, and a cathode of the light emitting diode LED5 is grounded via the resistor R35.
4. An emergency electric device with a switching function according to claim 1, wherein the DC/AC conversion circuit comprises a resistor R1, a capacitor C1, a resistor R2, a resistor R3, a capacitor C2, a resistor R4, an NPN transistor Q1, an NPN transistor Q2, an NPN transistor Q3, an NPN transistor Q4, a resistor R5 and a transformer T1, wherein a base of the NPN transistor Q1 is connected to a first end of the resistor R3, a collector of the NPN transistor Q1 is connected to a second end of the resistor R3 through the resistor R1, a collector of the NPN transistor Q1 is connected to a base of the NPN transistor Q4, an emitter of the NPN transistor Q1 is connected to an emitter of the NPN transistor Q2, a first end of the capacitor C1 is connected to a collector of the NPN transistor Q1, a second end of the capacitor C1 is connected to a base of the NPN transistor Q2, a base of the NPN transistor Q2 is connected to the second end of the resistor R3 through the resistor R2, a collector of the NPN transistor Q2 is connected to the second end of the resistor R3 through the resistor R4, a collector of the NPN transistor Q2 is connected to the base of the NPN transistor Q3, an emitter of the NPN transistor Q2 is grounded, a first end of the capacitor C2 is connected to the base of the NPN transistor Q1, a second end of the capacitor C2 is connected to the collector of the NPN transistor Q2, a collector of the NPN transistor Q3 is connected to the first input end of the transformer T1, an emitter of the NPN transistor Q3 is connected to the emitter of the NPN transistor Q4, a first end of the resistor R5 is connected to the emitter of the NPN transistor Q3, a second end of the resistor R5 is connected to the negative electrode of the battery interface, and a negative electrode of the battery interface is grounded, the positive electrode of the storage battery interface is connected with the second input end of the transformer T1, the collector of the NPN type triode Q4 is connected with the third input end of the transformer T1, and the output end of the transformer T1 is connected with the alternating current power supply interface.
5. An emergency electric device with a battery replacement function according to claim 1, wherein the DC/DC conversion circuit comprises a pre-step-down circuit, a reference voltage circuit and a linear voltage stabilizing circuit, an input terminal of the pre-step-down circuit is connected to the battery interface, an output terminal of the pre-step-down circuit is connected to an input terminal of the reference voltage circuit, an output terminal of the reference voltage circuit is connected to an input terminal of the linear voltage stabilizing circuit, an output terminal of the linear voltage stabilizing circuit is used for connecting to the DC power supply interface, and the pre-step-down circuit comprises a resistor R6, a resistor R7, an N-channel fet Q5, an N-channel fet Q6, an N-channel fet Q7, an N-channel fet Q8, a P-channel fet Q9, an NPN-type triode Q10, an NPN-type triode Q11, an NPN-type triode Q12, an NPN-type triode Q13, a resistor R8, an N-channel fet Q14, an NPN-channel fet Q14, a voltage stabilizing circuit, An N-channel fet Q15, a P-channel fet Q19, a capacitor C3, a ground connection is provided for a negative electrode of a battery interface, a positive electrode of the battery interface is connected to a first end of the resistor R6, a second end of the resistor R6 is connected to a collector of the NPN-type triode Q10 via the resistor R7, a collector of the NPN-type triode Q10 is connected to a base of the NPN-type triode Q10, a collector of the NPN-type triode Q10 is connected to a gate of the P-channel fet Q9, a base of the NPN-type triode Q10 is connected to a base of the NPN-type triode Q11, an emitter of the NPN-type triode Q10 is connected to a collector of the NPN-type triode Q12, an emitter of the NPN-type triode Q10 is connected to a base of the NPN-type triode Q13, a base of the NPN-type triode Q12 is connected to an emitter of the NPN-type triode Q11, and an emitter of the NPN-type triode Q12 is connected to a ground connection, the source of the N-channel fet Q5 is connected to the positive electrode of the battery interface, the gate of the N-channel fet Q5 is connected to the gate of the N-channel fet Q6, the drain of the N-channel fet Q5 is connected to the source of the N-channel fet Q7, the gate of the N-channel fet Q7 is connected to the gate of the N-channel fet Q8, the drain of the N-channel fet Q7 is connected to the drain of the P-channel fet Q9, the source of the P-channel fet Q9 is connected to the collector of the NPN-type triode Q11, the emitter of the NPN-type triode Q11 is connected to the collector of the NPN-type triode Q13, the emitter of the triode Q13 is connected to ground via the resistor R8, the source of the N-channel fet Q6 is connected to the positive electrode of the battery interface, the drain of the N-channel fet Q6 is connected to the source of the N-channel fet Q8, the drain electrode of N channel field effect transistor Q8 is connected the source electrode of N channel field effect transistor Q14, the drain electrode of N channel field effect transistor Q14 is connected the drain electrode of N channel field effect transistor Q14, the drain electrode of N channel field effect transistor Q14 is connected the source electrode of N channel field effect transistor Q15, the gate electrode of N channel field effect transistor Q15 is connected the drain electrode of N channel field effect transistor Q15, the drain electrode of N channel field effect transistor Q15 is connected ground, the gate electrode of P channel field effect transistor Q19 is connected the source electrode of N channel field effect transistor Q14, the drain electrode of P channel field effect transistor Q19 is connected the positive pole of battery interface, the source electrode of P channel field effect transistor Q19 passes through electric capacity C3 and connects ground, the source electrode of P channel field effect transistor Q19 is connected the input of reference voltage circuit.
6. An emergency electric device with a power switching function according to claim 5, wherein the reference voltage circuit comprises an N-channel FET Q20, an N-channel FET Q21, an N-channel FET Q22, an N-channel FET Q23, an N-channel FET Q24, an N-channel FET Q25, a P-channel FET Q26, a P-channel FET Q27, a P-channel FET Q28, a P-channel FET Q29, a P-channel FET Q30, a PNP-channel FET Q31, a PNP-type triode Q32, a PNP-type triode Q33, a capacitor C4, a resistor R9 and a resistor R10, wherein the source of the N-channel FET Q20 is connected to the output terminal of the pre-step-down circuit, the gate of the N-channel FET Q20 is connected to the gate of the N-channel FET Q22, the gate of the N-channel FET Q20 is connected to the source of the N-channel FET Q21, the grid of the N-channel field effect transistor Q20 is connected with the grid of the N-channel field effect transistor Q25, the drain of the N-channel field effect transistor Q20 is connected with the source of the N-channel field effect transistor Q21, the grid of the N-channel field effect transistor Q21 is connected with the grid of the N-channel field effect transistor Q23, the grid of the N-channel field effect transistor Q21 is connected with the grid of the N-channel field effect transistor Q24, the grid of the N-channel field effect transistor Q21 is connected with the drain of the P-channel field effect transistor Q27, the drain of the N-channel field effect transistor Q21 is connected with the drain of the P-channel field effect transistor Q27, the drain of the N-channel field effect transistor Q21 is connected with the drain of the P-channel field effect transistor Q26, the grid of the P-channel field effect transistor Q26 is connected with the output end of the pre-step-down circuit, the source of the P-channel field effect transistor Q26 is grounded through the capacitor C4, the grid of the P-channel field effect transistor Q27 is connected with the grid of the P-channel field effect transistor Q30, the source electrode of the P-channel field effect transistor Q27 is connected with the drain electrode of the P-channel field effect transistor Q28, the gate electrode of the P-channel field effect transistor Q28 is connected with the gate electrode of the P-channel field effect transistor Q29, the source electrode of the P-channel field effect transistor Q28 is connected with the emitter electrode of the PNP triode Q31, the collector electrode of the PNP triode Q31 is grounded, the base electrode of the PNP triode Q31 is grounded, the source electrode of the N-channel field effect transistor Q22 is connected with the source electrode of the N-channel field effect transistor Q20, the drain electrode of the N-channel field effect transistor Q22 is connected with the source electrode of the N-channel field effect transistor Q23, the drain electrode of the N-channel field effect transistor Q23 is connected with the drain electrode of the P-channel field effect transistor Q30, the source electrode of the P-channel field effect transistor Q30 is connected with the drain electrode of the P-channel field effect transistor Q29, the source electrode of the P-channel field effect transistor Q29 is connected with the emitter electrode of the PNP triode Q32 through the resistor R9, the base of the PNP type triode Q32 is grounded, the collector of the PNP type triode Q32 is grounded, the source of the N-channel field effect transistor Q25 is connected with the source of the N-channel field effect transistor Q20, the drain of the N-channel field effect transistor Q25 is connected with the source of the N-channel field effect transistor Q24, the drain of the N-channel field effect transistor Q24 is connected with the input end of the linear voltage stabilizing circuit, the drain of the N-channel field effect transistor Q24 is connected with the emitter of the PNP type triode Q33 through the resistor R10, the base of the PNP type triode Q33 is grounded, and the collector of the PNP type triode Q33 is grounded.
7. An emergency electric device with a battery swapping function according to claim 5, wherein the linear voltage stabilizing circuit comprises an operational amplifier U1, an N-channel FET Q34, an N-channel FET Q35, a P-channel FET Q36, a resistor R11, a resistor R12 and a resistor R13, the non-inverting input terminal of the operational amplifier U1 is connected to the output terminal of the reference voltage circuit, the output terminal of the operational amplifier U1 is connected to the gate of the P-channel FET Q36, the source of the P-channel FET Q36 is grounded, the drain of the P-channel FET Q36 is connected to the drain of the N-channel FET Q34, the source of the N-channel FET Q34 is connected to the positive electrode of the battery interface, the gate of the N-channel FET Q34 is connected to the gate of the N-channel FET Q35, the gate of the N-channel FET Q34 is connected to the drain of the P-channel FET Q36, the source electrode of N channel field effect transistor Q35 is connected the source electrode of N channel field effect transistor Q34, the drain electrode of N channel field effect transistor Q35 is used for connecting the direct current power supply interface, the drain electrode of N channel field effect transistor Q35 passes through resistance R11 connects the first end of resistance R12, the second end ground connection of resistance R12, the first end of resistance R12 is connected the inverting input end of U1 is put to the fortune, the first end of resistance R13 is connected the drain electrode of N channel field effect transistor Q35, the second end ground connection of resistance R13.
8. The emergency power utilization apparatus with a power conversion function according to claim 1, further comprising a power remaining display circuit, wherein the power remaining display circuit comprises a resistor R18, a resistor R19, a resistor R24, a resistor R29, a first power display branch, a second power display branch, a third power display branch and a fourth power display branch, a first end of the resistor R18 is connected to a Vref reference voltage, a second end of the resistor R18 is connected to an input end of the first power display branch, a second end of the resistor R18 is connected to a first end of the resistor R19, a second end of the resistor R19 is connected to an input end of the second power display branch, a second end of the resistor R19 is connected to a first end of the resistor R24, a second end of the resistor R24 is connected to an input end of the third power display branch, a second end of the resistor R24 is connected to a first end of the resistor R29, the second end of the resistor R29 is connected to the input end of the fourth electricity quantity display branch, and the second end of the resistor R29 is grounded.
9. The emergency electric device with an electric changing function according to claim 8, the circuit structures of the second electric quantity display branch circuit, the third electric quantity display branch circuit and the fourth electric quantity display branch circuit are the same as those of the first electric quantity display branch circuit, the first power display branch comprises an operational amplifier U2, a resistor R14, a resistor R15, a resistor R16, a resistor R17 and a power indicator LED1, the non-inverting input end of the operational amplifier U2 is connected with the anode of the battery interface through the resistor R14, the non-inverting input terminal of the operational amplifier U2 is grounded through the resistor R15, the inverting input terminal of the operational amplifier U2 is connected to the second terminal of the resistor R18, the output end of the operational amplifier U2 is connected with the non-inverting input end of the operational amplifier U2 through the resistor R16, the output end of the operational amplifier U2 is connected with the anode of the power indicator LED1 through the resistor R17, and the cathode of the power indicator LED1 is grounded.
CN202221772991.1U 2022-07-11 2022-07-11 Emergency power utilization device with battery replacement function Active CN217159369U (en)

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