Power management method and device for portable first aid equipment, and portable first aid equipment

Abstract

The present invention relates to a power management method for portable first aid equipment, comprising: a main control chip sending a power control signal to a power switching circuit, and the power switching circuit switching the power supply according to the power control signal; the main control chip sending a charging control signal to a charging management circuit, and the charging management circuit switching the charging path according to the charging control signal. The present application realizes that when the power source is replaced, the equipment does not interrupt the work, thereby ensuring the life safety of the patient. The present invention also relates to a power management device for portable first aid equipment and portable first aid equipment.

Description

Technical Field

[0001] The present invention relates to the field of computer technology, and in particular to a power management method and device for portable first aid equipment, and portable first aid equipment. Background Art

[0002] Portable emergency equipment is a device that can provide basic life support to patients in emergency situations. It is often used in emergency, rescue, and field expeditions. The system usually includes the following functions: The ventilator provides artificial ventilation to keep the patient breathing normally. The ECG monitor monitors the electrocardiogram and provides necessary cardiac support. The oxygen cylinder provides oxygen to ensure that the patient's oxygen level is normal. The infusion pump is used to deliver drugs or fluids to maintain the patient's fluid balance. The monitoring instrument is used to monitor the patient's vital signs, such as blood pressure, pulse, and respiratory rate. These devices are usually integrated into a small, lightweight device for easy carrying. When the emergency equipment is running, none of the above devices can stop running due to power problems, which will threaten the patient's life. How to ensure the uninterrupted operation of the whole machine and ensure the safety of the patient's life is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a power management method and device for portable first aid equipment and portable first aid equipment in view of the deficiencies in the prior art.

[0004] The technical solution of the present invention to solve the above technical problems is as follows:

[0005] In a first aspect, the present application provides a power management method for a portable first aid device, which is applied to the portable first aid device, wherein the portable first aid device includes a main control chip, a built-in battery, an external battery, an external power supply circuit, a power switching circuit, a breathing load circuit, a liquid infusion load circuit, a monitoring load circuit, and a human-computer interaction load circuit, wherein the power switching circuit includes a load detection circuit, a power supply switching circuit, and a charging management circuit, and the method includes:

[0006] The load detection circuit is respectively connected to the main control chip, the breathing load circuit, the liquid infusion load circuit, the monitoring load circuit and the human-computer interaction load circuit, generates a first interrupt signal according to the voltage at the output end of the breathing load circuit and feeds it back to the main control chip, generates a second interrupt signal according to the voltage at the output end of the liquid infusion load circuit and feeds it back to the main control chip, and generates a third interrupt signal according to the voltage at the output end of the monitoring load circuit and feeds it back to the main control chip;

[0007] The power supply switching circuit is connected to the main control chip, the built-in battery, the external battery and the external power supply circuit, generates a first trigger signal according to the voltage at the output end of the built-in battery and feeds it back to the main control chip, generates a second trigger signal according to the voltage at the output end of the external battery and feeds it back to the main control chip, and generates a third trigger signal according to the voltage at the output end of the external power supply circuit and feeds it back to the main control chip;

[0008] The main control chip sends a power supply control signal to the power supply switching circuit according to the first interrupt signal, the second interrupt signal, the third interrupt signal, the first trigger signal, the second trigger signal and the third trigger signal, and the power supply switching circuit switches the power supply source according to the power supply control signal;

[0009] The main control chip sends a charging control signal to the charging management circuit according to the first trigger signal, the second trigger signal and the third trigger signal, and the charging management circuit switches the charging path according to the charging control signal.

[0010] In a second aspect, the present application provides a power management device for a portable first aid device, the power management device comprising a main control chip, a load detection circuit, a power supply switching circuit and a charging management circuit;

[0011] The load detection circuit is respectively connected to the main control chip, the breathing load circuit, the liquid infusion load circuit, the monitoring load circuit and the human-computer interaction load circuit, and is used to generate a first interrupt signal according to the voltage at the output end of the breathing load circuit and feed it back to the main control chip, generate a second interrupt signal according to the voltage at the output end of the liquid infusion load circuit and feed it back to the main control chip, and generate a third interrupt signal according to the voltage at the output end of the monitoring load circuit and feed it back to the main control chip;

[0012] The power supply switching circuit is connected to the main control chip, the built-in battery, the external battery and the external power supply circuit, and is used to generate a first trigger signal according to the voltage at the output end of the built-in battery and feed it back to the main control chip, generate a second trigger signal according to the voltage at the output end of the external battery and feed it back to the main control chip, and generate a third trigger signal according to the voltage at the output end of the external power supply circuit and feed it back to the main control chip;

[0013] The main control chip is used to send a power supply control signal to the power supply switching circuit according to the first interrupt signal, the second interrupt signal, the third interrupt signal, the first trigger signal, the second trigger signal and the third trigger signal, and the power supply switching circuit switches the power supply according to the power supply control signal;

[0014] The main control chip is also used to send a charging control signal to the charging management circuit according to the first trigger signal, the second trigger signal and the third trigger signal, and the charging management circuit switches the charging path according to the charging control signal.

[0015] In a third aspect, the present application further provides a portable first aid device, wherein the portable first aid device is configured to store computer instructions, and when the computer instructions are executed by a processor, the power management method for the portable first aid device as described in the first aspect is implemented.

[0016] The beneficial effects of the present invention are as follows: a power management method for a portable emergency device is proposed, including the load detection circuit generating a first interrupt signal according to the voltage at the output end of the respiratory load circuit and feeding it back to the main control chip, generating a second interrupt signal according to the voltage at the output end of the liquid infusion load circuit and feeding it back to the main control chip, and generating a third interrupt signal according to the voltage at the output end of the monitoring load circuit and feeding it back to the main control chip; the power supply switching circuit generates a first trigger signal according to the voltage at the output end of the built-in battery and feeds it back to the main control chip, generates a second trigger signal according to the voltage at the output end of the external battery and feeds it back to the main control chip, and generates a third trigger signal according to the voltage at the output end of the external power supply circuit and feeds it back to the main control chip; the main control chip sends a power supply control signal to the power supply switching circuit, and the power supply switching circuit switches the power supply according to the power supply control signal; the main control chip sends a charging control signal to the charging management circuit, and the charging management circuit switches the charging path according to the charging control signal. The present application realizes that when the power source is replaced, the device does not interrupt the work, thereby ensuring the life safety of the patient.

[0017] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of a flow chart of a power management method for a portable emergency device according to an embodiment of the present invention;

[0020] Figure 2 This is a module diagram of a power management device for portable emergency equipment according to another embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0022] like Figure 1 The power management method of a portable first aid device described in an embodiment of the present invention is applied to a portable first aid device, wherein the portable first aid device includes a main control chip, a built-in battery, an external battery, an external power supply circuit, a power switching circuit, a breathing load circuit, a liquid infusion load circuit, a monitoring load circuit, and a human-computer interaction load circuit, wherein the power switching circuit includes a load detection circuit, a power supply switching circuit, and a charging management circuit, and includes the following steps:

[0023] 110. The load detection circuit is connected to the main control chip, the breathing load circuit, the liquid infusion load circuit, the monitoring load circuit and the human-computer interaction load circuit respectively, generates a first interrupt signal according to the voltage at the output end of the breathing load circuit and feeds it back to the main control chip, generates a second interrupt signal according to the voltage at the output end of the liquid infusion load circuit and feeds it back to the main control chip, and generates a third interrupt signal according to the voltage at the output end of the monitoring load circuit and feeds it back to the main control chip;

[0024] 120. The power supply switching circuit is connected to the main control chip, the built-in battery, the external battery and the external power supply circuit, generates a first trigger signal according to the voltage at the output end of the built-in battery and feeds it back to the main control chip, generates a second trigger signal according to the voltage at the output end of the external battery and feeds it back to the main control chip, and generates a third trigger signal according to the voltage at the output end of the external power supply circuit and feeds it back to the main control chip;

[0025] 130. The main control chip sends a power supply control signal to the power supply switching circuit according to the first interrupt signal, the second interrupt signal, the third interrupt signal, the first trigger signal, the second trigger signal and the third trigger signal, and the power supply switching circuit switches the power supply source according to the power supply control signal;

[0026] 140. The main control chip sends a charging control signal to the charging management circuit according to the first trigger signal, the second trigger signal and the third trigger signal, and the charging management circuit switches the charging path according to the charging control signal.

[0027] Based on the above embodiment, further, the load detection circuit includes a first resistor, a second resistor, a third resistor, a first transistor, a second transistor and a third transistor;

[0028] The collector of the first transistor is connected to the breathing load circuit, the breathing load circuit is connected to the first end of the first resistor, the second end of the first resistor is connected to the emitter of the first transistor, the base of the first transistor is connected to the base of the second transistor, the emitter of the second transistor is connected to the second end of the second resistor, the first end of the second resistor is connected to the liquid infusion load circuit, the liquid infusion load circuit is connected to the collector of the second transistor, the collector of the third transistor is connected to the monitoring load circuit, the monitoring load circuit is connected to the first end of the third resistor, and the second end of the third resistor is connected to the emitter of the third transistor;

[0029] The first interrupt signal is generated according to the voltage at the output end of the breathing load circuit and fed back to the main control chip, the second interrupt signal is generated according to the voltage at the output end of the liquid infusion load circuit and fed back to the main control chip, and the third interrupt signal is generated according to the voltage at the output end of the monitoring load circuit and fed back to the main control chip, specifically including:

[0030] When the breathing load circuit is turned on, the first transistor is turned off, and it is detected that the connection end between the breathing load circuit and the first resistor is at a high level, and the first interrupt signal is generated and sent to the main control chip;

[0031] When the liquid infusion load circuit is turned on, the second transistor is turned off, and it is detected that the connection end between the liquid infusion load circuit and the second resistor is at a high level, and the second interrupt signal is generated and sent to the main control chip;

[0032] When the monitoring load circuit is turned on, the third transistor is turned off, and it is detected that the connection end between the monitoring load circuit and the third resistor is at a high level, and the third interrupt signal is generated and sent to the main control chip.

[0033] Based on the above embodiment, further, the power supply switching circuit includes a first switch, a second switch and a third switch, the first switch is connected to the output end of the built-in battery, the second switch is connected to the output end of the external battery, and the third switch is connected to the external power supply circuit;

[0034] The first switch includes a fourth transistor and a fifth transistor, the emitter of the fourth transistor is connected to the output end of the first boost circuit, the collector of the fourth transistor is connected to the gate of the first transistor, the base of the fourth transistor is connected to the collector of the fifth transistor, the base of the fifth transistor is connected to the output end of the built-in battery, and the emitter of the fifth transistor is grounded;

[0035] The second switch includes a sixth transistor and a seventh transistor, the emitter of the sixth transistor is connected to the output end of the second boost circuit, the collector of the sixth transistor is connected to the gate of the second transistor, the base of the sixth transistor is connected to the collector of the seventh transistor, and the base of the seventh transistor is connected to the output end of the external battery;

[0036] The third switch includes an eighth transistor and a ninth transistor, the emitter of the eighth transistor is connected to the output end of the third boost circuit, the collector of the eighth transistor is connected to the gate of the third transistor, the base of the eighth transistor is connected to the collector of the ninth transistor, and the base of the ninth transistor is connected to the output end of the external power supply circuit.

[0037] Based on the above embodiment, further, the main control chip sends a power supply control signal to the power supply switching circuit according to the first interrupt signal, the second interrupt signal, the third interrupt signal, the first trigger signal, the second trigger signal and the third trigger signal, and the power supply switching circuit switches the power supply according to the power supply control signal, specifically including:

[0038] If the main control chip receives the first trigger signal, the first switch is controlled to be closed, the second switch is controlled to be closed, and the third switch is controlled to be closed, and it is determined whether one of the first interrupt signal, the second interrupt signal or the third interrupt signal is received, and the load circuit that has been turned on is obtained according to the received interrupt signal, and the power of the load circuit that has been turned on is obtained according to the load circuit that has been turned on, and the continuous working time of the built-in battery is obtained according to the total capacity of the built-in battery and the power of the load circuit that has been turned on;

[0039] If the main control chip receives the second trigger signal, the second switch is controlled to be closed, the first switch is opened, and the third switch is opened, and it is determined whether one of the first interrupt signal, the second interrupt signal, or the third interrupt signal is received, and the load circuit that has been turned on is obtained according to the received interrupt signal, and the power of the load circuit that has been turned on is obtained according to the load circuit that has been turned on, and the continuous working time of the external battery is obtained according to the total capacity of the external battery and the power of the load circuit that has been turned on;

[0040] If the main control chip receives the third trigger signal, it controls the third switch to be closed, the second switch to be opened, and the first switch to be opened.

[0041] Based on the above embodiment, further, the main control chip sends a charging control signal to the charging management circuit according to the first trigger signal, the second trigger signal and the third trigger signal, and the charging management circuit switches the charging path according to the charging control signal, specifically including:

[0042] If the main control chip receives the third trigger signal, the main control chip sends the charging control signal to the charging management circuit, and the charging management circuit closes the first charging switch connected to the built-in battery and closes the second charging switch connected to the external battery.

[0043] A power management method for a portable emergency device proposed based on the above embodiment includes the load detection circuit generating a first interrupt signal according to the voltage at the output end of the breathing load circuit and feeding it back to the main control chip, generating a second interrupt signal according to the voltage at the output end of the liquid infusion load circuit and feeding it back to the main control chip, and generating a third interrupt signal according to the voltage at the output end of the monitoring load circuit and feeding it back to the main control chip; the power supply switching circuit generates a first trigger signal according to the voltage at the output end of the built-in battery and feeds it back to the main control chip, generates a second trigger signal according to the voltage at the output end of the external battery and feeds it back to the main control chip, and generates a third trigger signal according to the voltage at the output end of the external power supply circuit and feeds it back to the main control chip; the main control chip sends a power supply control signal to the power supply switching circuit, and the power supply switching circuit switches the power supply according to the power supply control signal; the main control chip sends a charging control signal to the charging management circuit, and the charging management circuit switches the charging path according to the charging control signal. This application realizes that when the power source is replaced, the device does not interrupt work, thereby ensuring the life safety of the patient.

[0044] like Figure 2 According to another embodiment of the present invention, a power management device for a portable emergency equipment comprises a main control chip, a load detection circuit, a power supply switching circuit and a charging management circuit;

[0045] The load detection circuit is respectively connected to the main control chip, the breathing load circuit, the liquid infusion load circuit, the monitoring load circuit and the human-computer interaction load circuit, and is used to generate a first interrupt signal according to the voltage at the output end of the breathing load circuit and feed it back to the main control chip, generate a second interrupt signal according to the voltage at the output end of the liquid infusion load circuit and feed it back to the main control chip, and generate a third interrupt signal according to the voltage at the output end of the monitoring load circuit and feed it back to the main control chip;

[0046] The power supply switching circuit is connected to the main control chip, the built-in battery, the external battery and the external power supply circuit, and is used to generate a first trigger signal according to the voltage at the output end of the built-in battery and feed it back to the main control chip, generate a second trigger signal according to the voltage at the output end of the external battery and feed it back to the main control chip, and generate a third trigger signal according to the voltage at the output end of the external power supply circuit and feed it back to the main control chip;

[0047] The main control chip is used to send a power supply control signal to the power supply switching circuit according to the first interrupt signal, the second interrupt signal, the third interrupt signal, the first trigger signal, the second trigger signal and the third trigger signal, and the power supply switching circuit switches the power supply according to the power supply control signal;

[0048] The main control chip is also used to send a charging control signal to the charging management circuit according to the first trigger signal, the second trigger signal and the third trigger signal, and the charging management circuit switches the charging path according to the charging control signal.

[0049] Based on the above embodiment, further, the load detection circuit includes a first resistor, a second resistor, a third resistor, a first transistor, a second transistor and a third transistor;

[0050] The collector of the first transistor is connected to the breathing load circuit, the breathing load circuit is connected to the first end of the first resistor, the second end of the first resistor is connected to the emitter of the first transistor, the base of the first transistor is connected to the base of the second transistor, the emitter of the second transistor is connected to the second end of the second resistor, the first end of the second resistor is connected to the liquid infusion load circuit, the liquid infusion load circuit is connected to the collector of the second transistor, the collector of the third transistor is connected to the monitoring load circuit, the monitoring load circuit is connected to the first end of the third resistor, and the second end of the third resistor is connected to the emitter of the third transistor;

[0051] The first interrupt signal is generated according to the voltage at the output end of the breathing load circuit and fed back to the main control chip, the second interrupt signal is generated according to the voltage at the output end of the liquid infusion load circuit and fed back to the main control chip, and the third interrupt signal is generated according to the voltage at the output end of the monitoring load circuit and fed back to the main control chip, specifically including:

[0052] When the breathing load circuit is turned on, the first transistor is turned off, and it is detected that the connection end between the breathing load circuit and the first resistor is at a high level, and the first interrupt signal is generated and sent to the main control chip;

[0053] When the liquid infusion load circuit is turned on, the second transistor is turned off, and it is detected that the connection end between the liquid infusion load circuit and the second resistor is at a high level, and the second interrupt signal is generated and sent to the main control chip;

[0054] When the monitoring load circuit is turned on, the third transistor is turned off, and it is detected that the connection end between the monitoring load circuit and the third resistor is at a high level, and the third interrupt signal is generated and sent to the main control chip.

[0055] Based on the above embodiment, further, the power supply switching circuit includes a first switch, a second switch and a third switch, the first switch is connected to the output end of the built-in battery, the second switch is connected to the output end of the external battery, and the third switch is connected to the external power supply circuit;

[0056] The first switch includes a fourth transistor and a fifth transistor, the emitter of the fourth transistor is connected to the output end of the first boost circuit, the collector of the fourth transistor is connected to the gate of the first transistor, the base of the fourth transistor is connected to the collector of the fifth transistor, the base of the fifth transistor is connected to the output end of the built-in battery, and the emitter of the fifth transistor is grounded;

[0057] The second switch includes a sixth transistor and a seventh transistor, the emitter of the sixth transistor is connected to the output end of the second boost circuit, the collector of the sixth transistor is connected to the gate of the second transistor, the base of the sixth transistor is connected to the collector of the seventh transistor, and the base of the seventh transistor is connected to the output end of the external battery;

[0058] The third switch includes an eighth transistor and a ninth transistor, the emitter of the eighth transistor is connected to the output end of the third boost circuit, the collector of the eighth transistor is connected to the gate of the third transistor, the base of the eighth transistor is connected to the collector of the ninth transistor, and the base of the ninth transistor is connected to the output end of the external power supply circuit.

[0059] Based on the above embodiment, further, the main control chip is also used to control the first switch to be closed, the second switch to be closed, and the third switch to be closed if the first trigger signal is received, and to determine whether one of the first interrupt signal, the second interrupt signal, or the third interrupt signal is received, and to obtain the turned-on load circuit according to the received interrupt signal, and to obtain the power of the turned-on load circuit according to the turned-on load circuit, and to obtain the continuous working time of the built-in battery according to the total capacity of the built-in battery and the power of the turned-on load circuit;

[0060] If the main control chip receives the second trigger signal, the second switch is controlled to be closed, the first switch is opened, and the third switch is opened, and it is determined whether one of the first interrupt signal, the second interrupt signal, or the third interrupt signal is received, and the load circuit that has been turned on is obtained according to the received interrupt signal, and the power of the load circuit that has been turned on is obtained according to the load circuit that has been turned on, and the continuous working time of the external battery is obtained according to the total capacity of the external battery and the power of the load circuit that has been turned on;

[0061] If the main control chip receives the third trigger signal, it controls the third switch to be closed, the second switch to be opened, and the first switch to be opened.

[0062] The present invention also provides a portable first aid device, which is configured to store computer instructions, and when the computer instructions are executed by a processor, the power management method for the portable first aid device as described in the above technical solution is implemented.

[0063] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

[0064] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A power management method for a portable emergency device, applied to the portable emergency device, characterized in that: The portable first aid device includes a main control chip, a built-in battery, an external battery, an external power supply circuit, a power switching circuit, a breathing load circuit, a liquid infusion load circuit, a monitoring load circuit and a human-computer interaction load circuit, wherein the power switching circuit includes a load detection circuit, a power supply switching circuit and a charging management circuit, and the method includes: The load detection circuit is respectively connected to the main control chip, the breathing load circuit, the liquid infusion load circuit, the monitoring load circuit and the human-computer interaction load circuit, generates a first interrupt signal according to the voltage at the output end of the breathing load circuit and feeds it back to the main control chip, generates a second interrupt signal according to the voltage at the output end of the liquid infusion load circuit and feeds it back to the main control chip, and generates a third interrupt signal according to the voltage at the output end of the monitoring load circuit and feeds it back to the main control chip; The power supply switching circuit is connected to the main control chip, the built-in battery, the external battery and the external power supply circuit, generates a first trigger signal according to the voltage at the output end of the built-in battery and feeds it back to the main control chip, generates a second trigger signal according to the voltage at the output end of the external battery and feeds it back to the main control chip, and generates a third trigger signal according to the voltage at the output end of the external power supply circuit and feeds it back to the main control chip; The main control chip sends a power supply control signal to the power supply switching circuit according to the first interrupt signal, the second interrupt signal, the third interrupt signal, the first trigger signal, the second trigger signal and the third trigger signal, and the power supply switching circuit switches the power supply source according to the power supply control signal; The main control chip sends a charging control signal to the charging management circuit according to the first trigger signal, the second trigger signal and the third trigger signal, and the charging management circuit switches the charging path according to the charging control signal; The load detection circuit comprises a first resistor, a second resistor, a third resistor, a first triode, a second triode and a third triode; The collector of the first transistor is connected to the breathing load circuit, the breathing load circuit is connected to the first end of the first resistor, the second end of the first resistor is connected to the emitter of the first transistor, the base of the first transistor is connected to the base of the second transistor, the emitter of the second transistor is connected to the second end of the second resistor, the first end of the second resistor is connected to the liquid infusion load circuit, the liquid infusion load circuit is connected to the collector of the second transistor, the collector of the third transistor is connected to the monitoring load circuit, the monitoring load circuit is connected to the first end of the third resistor, and the second end of the third resistor is connected to the emitter of the third transistor; The first interrupt signal is generated according to the voltage at the output end of the breathing load circuit and fed back to the main control chip, the second interrupt signal is generated according to the voltage at the output end of the liquid infusion load circuit and fed back to the main control chip, and the third interrupt signal is generated according to the voltage at the output end of the monitoring load circuit and fed back to the main control chip, specifically including: When the breathing load circuit is turned on, the first transistor is turned off, and it is detected that the connection end between the breathing load circuit and the first resistor is at a high level, and the first interrupt signal is generated and sent to the main control chip; When the liquid infusion load circuit is turned on, the second transistor is turned off, and it is detected that the connection end between the liquid infusion load circuit and the second resistor is at a high level, and the second interrupt signal is generated and sent to the main control chip; When the monitoring load circuit is turned on, the third transistor is turned off, and it is detected that the connection end between the monitoring load circuit and the third resistor is at a high level, and the third interrupt signal is generated and sent to the main control chip; The power supply switching circuit includes a first switch, a second switch and a third switch, the first switch is connected to the output end of the built-in battery, the second switch is connected to the output end of the external battery, and the third switch is connected to the external power supply circuit; The first switch includes a fourth transistor and a fifth transistor, the emitter of the fourth transistor is connected to the output end of the first boost circuit, the collector of the fourth transistor is connected to the gate of the first transistor, the base of the fourth transistor is connected to the collector of the fifth transistor, the base of the fifth transistor is connected to the output end of the built-in battery, and the emitter of the fifth transistor is grounded; The second switch includes a sixth transistor and a seventh transistor, the emitter of the sixth transistor is connected to the output end of the second boost circuit, the collector of the sixth transistor is connected to the gate of the second transistor, the base of the sixth transistor is connected to the collector of the seventh transistor, and the base of the seventh transistor is connected to the output end of the external battery; The third switch comprises an eighth triode and a ninth triode, the emitter of the eighth triode is connected to the output end of the third boost circuit, the collector of the eighth triode is connected to the gate of the third transistor, the base of the eighth triode is connected to the collector of the ninth triode, and the base of the ninth triode is connected to the output end of the external power supply circuit; The main control chip sends a power supply control signal to the power supply switching circuit according to the first interrupt signal, the second interrupt signal, the third interrupt signal, the first trigger signal, the second trigger signal and the third trigger signal, and the power supply switching circuit switches the power supply according to the power supply control signal, specifically including: If the main control chip receives the first trigger signal, the first switch is controlled to be closed, the second switch is controlled to be closed, and the third switch is controlled to be closed, and it is determined whether one of the first interrupt signal, the second interrupt signal or the third interrupt signal is received, and the load circuit that has been turned on is obtained according to the received interrupt signal, and the power of the load circuit that has been turned on is obtained according to the load circuit that has been turned on, and the continuous working time of the built-in battery is obtained according to the total capacity of the built-in battery and the power of the load circuit that has been turned on; If the main control chip receives the second trigger signal, the second switch is controlled to be closed, the first switch is opened, and the third switch is opened, and it is determined whether one of the first interrupt signal, the second interrupt signal, or the third interrupt signal is received, and the load circuit that has been turned on is obtained according to the received interrupt signal, and the power of the load circuit that has been turned on is obtained according to the load circuit that has been turned on, and the continuous working time of the external battery is obtained according to the total capacity of the external battery and the power of the load circuit that has been turned on; If the main control chip receives the third trigger signal, the third switch is controlled to be closed, the second switch is opened, and the first switch is opened; The main control chip sends a charging control signal to the charging management circuit according to the first trigger signal, the second trigger signal and the third trigger signal, and the charging management circuit switches the charging path according to the charging control signal, specifically including: If the main control chip receives the third trigger signal, the main control chip sends the charging control signal to the charging management circuit, and the charging management circuit closes the first charging switch connected to the built-in battery and closes the second charging switch connected to the external battery.

2. A portable first aid device, wherein the portable first aid device is provided with computer instructions stored therein, characterized in that: When the computer instructions are executed by a processor, the power management method of the portable emergency device as claimed in claim 1 is implemented.

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