Emergency external output device

Abstract

The utility model discloses an emergency external output device, which relates to the field of power supply conversion, and comprises an output switch circuit used for receiving the control of a main control circuit and converting input voltage and current into output voltage and current with adjustable magnitude; the input detection circuit is used for detecting input voltage and current and outputting the input voltage and current to the main control circuit; the output detection circuit is used for detecting output voltage and current and outputting the voltage and current to the main control circuit; the main control circuit is used for assisting in adjusting the output switch circuit based on the input and output voltage and current to obtain the required output voltage and current; the beneficial effects of the utility model are that when voltage and current are introduced through the input interface, the main control circuit controls the conduction state of an electronic switch (specifically an MOS tube) in the output switch circuit so as to adjust the magnitude of the output voltage and current of the output interface, so that high-power DC output can be provided when the power supply is used outdoors; and the electricity demand of a user is met.

Description

Technical Field

[0001] This utility model relates to the field of power conversion, specifically an emergency external output device. Background Technology

[0002] Most car jump starters currently on the market are equipped with only 1-2 USB-A ports, and their maximum output power is mostly below 18W. This design cannot meet the diverse power supply needs of modern in-vehicle devices. For example, when simultaneously powering high-power devices such as car refrigerators (requiring 45W or more) and drones (requiring 100W PD protocol), the existing power specifications are incompatible.

[0003] Therefore, the current car jump starters on the market have low output power and need improvement. Utility Model Content

[0004] The purpose of this invention is to provide an emergency external output device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An emergency external output device includes:

[0007] The output switching circuit is used to receive control from the main control circuit and convert the input voltage and current into an adjustable output voltage and current.

[0008] The input detection circuit is used to detect the input voltage and current and output them to the main control circuit.

[0009] The output detection circuit is used to detect the output voltage and current and output them to the main control circuit.

[0010] The main control circuit is used to assist in adjusting the output switching circuit based on the input and output voltage and current to obtain the required output voltage and current.

[0011] The input detection circuit is connected to the main control module, the output detection circuit is connected to the main control circuit, and the main control circuit is connected to the output switch circuit.

[0012] As a further embodiment of this utility model: the output switching circuit includes MOSFETs M1, M2, M3, M4, and M5, and inductor L1. One end of MOSFET L1 is connected to the source (S) of MOSFET M3 and the drain (D) of MOSFET M5. The source (S) of MOSFET M5 is grounded. The gate (G) of MOSFET M5 is connected to the main control circuit through resistor R8. The gate (G) of MOSFET M3 is connected to the main control circuit through resistor R4. The drain (D) of MOSFET M3 is connected to one end of resistor R2. The other end of resistor R2 is connected to the positive terminal of the output of the input board. The negative terminal of the output of the input board is grounded.

[0013] The other end of inductor L1 is connected to the source (S) of MOSFET M2 and the drain (D) of MOSFET M4. The source (S) of MOSFET M4 is grounded. The gate (G) of MOSFET M4 is connected to the main control circuit through resistor R5. The gate (G) of MOSFET M2 is connected to the main control circuit through resistor R3. The drain (D) of MOSFET M2 is connected to one end of resistor R1. The other end of resistor R1 is connected to the drain (D) of MOSFET M1. The gate (G) of MOSFET M1 is connected to the main control circuit. The source (S) of MOSFET M1 is connected to the positive input terminal of the output board. The negative input terminal of the output board is grounded.

[0014] As a further embodiment of this utility model: the input detection circuit includes resistors R17, R18, R19, R20, and R21, capacitors C14 and C15. One end of resistor R17 is connected to one end of resistor R19 and the input interface. The other end of resistor R17 is connected to one end of resistor R18, one end of resistor R20, and the positive terminal of the input board. The negative terminal of the input board is grounded. The other end of resistor R18 is connected to one end of capacitor C14 and the main control circuit. The other end of resistor R19 is connected to the other end of capacitor C14 and the main control circuit. The other end of resistor R20 is connected to one end of resistor R21, one end of capacitor C15, and the main control circuit. The other end of resistor R21 is grounded, and the other end of capacitor C15 is grounded.

[0015] As a further embodiment of this utility model: the output detection circuit includes resistors R9, R11, R12, R15, and R16, capacitors C11 and C13. One end of resistor R9 is connected to one end of resistor R12 and the output interface. The other end of resistor R9 is connected to one end of resistor R11, one end of resistor R15, and the positive terminal of the output board. The negative terminal of the output board is grounded. The other end of resistor R11 is connected to one end of capacitor C11 and the main control circuit. The other end of resistor R12 is connected to the other end of capacitor C11 and the main control circuit. The other end of resistor R15 is connected to one end of resistor R16, one end of capacitor C13, and the main control circuit. The other end of resistor R16 is grounded, and the other end of capacitor C13 is grounded.

[0016] As a further improvement of this utility model, the emergency external output device also includes a display module for receiving signals from the main control circuit and displaying input and output voltage and current. The display module is connected to the main control circuit.

[0017] As a further improvement of this utility model, the emergency external output device also includes a button module for adjusting the working state of the main control circuit via buttons, and the button module is connected to the main control circuit.

[0018] Compared with the prior art, the beneficial effects of this utility model are: when voltage and current are introduced through the input interface, the main control circuit controls the conduction state of the electronic switch (specifically, a MOSFET) in the output switching circuit to adjust the output voltage and current of the output interface, so that it can provide high-power DC output when used outdoors to meet the user's power needs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an emergency external output device.

[0020] Figure 2 This is the circuit diagram for the output switch circuit.

[0021] Figure 3 This is the circuit diagram for the input detection circuit.

[0022] Figure 4 This is the circuit diagram for the output detection circuit. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 An emergency external output device, comprising:

[0025] The output switching circuit is used to receive control from the main control circuit and convert the input voltage and current into an adjustable output voltage and current.

[0026] The input detection circuit is used to detect the input voltage and current and output them to the main control circuit.

[0027] The output detection circuit is used to detect the output voltage and current and output them to the main control circuit; by detecting the magnitude of the voltage and current, it can also further determine whether there is a short circuit.

[0028] The main control circuit is used to assist in adjusting the output switching circuit based on the input and output voltage and current to obtain the required output voltage and current.

[0029] The input detection circuit is connected to the main control module, the output detection circuit is connected to the main control circuit, and the main control circuit is connected to the output switch circuit.

[0030] In this embodiment: Please refer to Figure 2The output switching circuit includes MOSFETs M1, M2, M3, M4, and M5, and inductor L1. One end of MOSFET L1 is connected to the source (S) of MOSFET M3 and the drain (D) of MOSFET M5. The source (S) of MOSFET M5 is grounded. The gate (G) of MOSFET M5 is connected to the main control circuit through resistor R8. The gate (G) of MOSFET M3 is connected to the main control circuit through resistor R4. The drain (D) of MOSFET M3 is connected to one end of resistor R2. The other end of resistor R2 is connected to the positive terminal of the input board's output. The negative terminal of the input board's output is grounded.

[0031] The other end of inductor L1 is connected to the source (S) of MOSFET M2 and the drain (D) of MOSFET M4. The source (S) of MOSFET M4 is grounded. The gate (G) of MOSFET M4 is connected to the main control circuit through resistor R5. The gate (G) of MOSFET M2 is connected to the main control circuit through resistor R3. The drain (D) of MOSFET M2 is connected to one end of resistor R1. The other end of resistor R1 is connected to the drain (D) of MOSFET M1. The gate (G) of MOSFET M1 is connected to the main control circuit. The source (S) of MOSFET M1 is connected to the positive input terminal of the output board. The negative input terminal of the output board is grounded.

[0032] The main control circuit adjusts the conduction status of each MOSFET based on the input and output voltage and current, so that the final output voltage and current are the required voltage and current.

[0033] In buck mode, MOSFET M2 is normally closed, MOSFET M4 is normally open, and MOSFETs M3 and M5 alternately turn on and off, forming a buck circuit to reduce voltage. The main control circuit controls the on and off times of MOSFETs M3 and M5 to control the voltage reduction.

[0034] In boost mode, MOSFET M3 is normally closed, MOSFET M5 is normally open, and MOSFETs M2 and M4 alternately turn on and off, forming a BOOST boost circuit for voltage boosting. The main control circuit controls the on and off times of MOSFETs M2 and M4 to control the boost amplitude.

[0035] The attached diagram shows multiple capacitors used for filtering to ensure stable voltage and current. The main control circuit adjusts the conduction status of the MOSFET based on the voltage and current magnitude, which is a common technique and does not involve any innovative method.

[0036] In another embodiment, the MOSFET can be replaced by an IGBT, a relay, or other electronic switch.

[0037] In this embodiment: Please refer to Figure 3The input detection circuit includes resistors R17, R18, R19, R20, and R21, and capacitors C14 and C15. One end of resistor R17 is connected to one end of resistor R19 and the input interface. The other end of resistor R17 is connected to one end of resistor R18, one end of resistor R20, and the positive terminal of the input board. The negative terminal of the input board is grounded. The other end of resistor R18 is connected to one end of capacitor C14 and the main control circuit. The other end of resistor R19 is connected to the other end of capacitor C14 and the main control circuit. The other end of resistor R20 is connected to one end of resistor R21, one end of capacitor C15, and the main control circuit. The other end of resistor R21 and capacitor C15 are grounded.

[0038] Input interface types include EC5, EC8, DC, and cigarette lighter interfaces, but other types are also possible; no restrictions are placed on the input interface. Resistor R17 has a fixed resistance. The current magnitude is determined by detecting the voltage difference across resistor R17. This voltage difference is output to the main control circuit through resistors R18 and R19, allowing the main control circuit to obtain the input current magnitude. The input voltage is the sum of the voltages across resistors R20 and R21. Resistor R21 acts as a sampling resistor, and its voltage is fed back to the main control circuit, which then obtains the input voltage magnitude.

[0039] In this embodiment: Please refer to Figure 4 The output detection circuit includes resistors R9, R11, R12, R15, and R16, and capacitors C11 and C13. One end of resistor R9 is connected to one end of resistor R12 and the output interface. The other end of resistor R9 is connected to one end of resistor R11, one end of resistor R15, and the positive terminal of the output board. The negative terminal of the output board is grounded. The other end of resistor R11 is connected to one end of capacitor C11 and the main control circuit. The other end of resistor R12 is connected to the other end of capacitor C11 and the main control circuit. The other end of resistor R15 is connected to one end of resistor R16, one end of capacitor C13, and the main control circuit. The other end of resistor R16 and capacitor C13 are grounded.

[0040] Output interface types include USB-A, USB-C, DC, and cigarette lighter interfaces, as well as other types of interfaces. Output interfaces can be standalone (e.g., USB-A) or combinations of different types (e.g., USB-A + USB-C). No restrictions are placed on the output interface. The working principle of the output detection circuit is similar to that of the input detection circuit and will not be elaborated further here.

[0041] In this embodiment: Please refer to Figure 1The emergency external output device also includes a display module for receiving signals from the main control circuit and displaying input and output voltage and current. The display module is connected to the main control circuit.

[0042] In this embodiment: Please refer to Figure 1 The emergency external output device also includes a button module, which is used to adjust the working state of the main control circuit by pressing the buttons. The button module is connected to the main control circuit.

[0043] Control signals are provided to the main control circuit via buttons. The main control circuit then controls the conduction status of the MOSFET, changing the output voltage and current to meet the user's needs.

[0044] The working principle of this utility model is as follows: the output switch circuit is used to receive the control of the main control circuit and convert the input voltage and current into an adjustable output voltage and current; the input detection circuit is used to detect the input voltage and current and output them to the main control circuit; the output detection circuit is used to detect the output voltage and current and output them to the main control circuit; the main control circuit is used to adjust the output switch circuit based on the input and output voltage and current to obtain the required output voltage and current.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An emergency external output device, characterized in that, The emergency external output device includes: The output switching circuit is used to receive control from the main control circuit and convert the input voltage and current into an adjustable output voltage and current. The input detection circuit is used to detect the input voltage and current and output them to the main control circuit. The output detection circuit is used to detect the output voltage and current and output them to the main control circuit. The main control circuit is used to assist in adjusting the output switching circuit based on the input and output voltage and current to obtain the required output voltage and current. The input detection circuit is connected to the main control module, the output detection circuit is connected to the main control circuit, and the main control circuit is connected to the output switch circuit. The output switching circuit includes MOSFETs M1, M2, M3, M4, and M5, and inductor L1. One end of MOSFET L1 is connected to the source (S) of MOSFET M3 and the drain (D) of MOSFET M5. The source (S) of MOSFET M5 is grounded. The gate (G) of MOSFET M5 is connected to the main control circuit through resistor R8. The gate (G) of MOSFET M3 is connected to the main control circuit through resistor R4. The drain (D) of MOSFET M3 is connected to one end of resistor R2. The other end of resistor R2 is connected to the positive terminal of the input board's output. The negative terminal of the input board's output is grounded. The other end of inductor L1 is connected to the source (S) of MOSFET M2 and the drain (D) of MOSFET M4. The source (S) of MOSFET M4 is grounded. The gate (G) of MOSFET M4 is connected to the main control circuit through resistor R5. The gate (G) of MOSFET M2 is connected to the main control circuit through resistor R3. The drain (D) of MOSFET M2 is connected to one end of resistor R1. The other end of resistor R1 is connected to the drain (D) of MOSFET M1. The gate (G) of MOSFET M1 is connected to the main control circuit. The source (S) of MOSFET M1 is connected to the positive input terminal of the output board. The negative input terminal of the output board is grounded. The input detection circuit includes resistors R17, R18, R19, R20, and R21, and capacitors C14 and C15. One end of resistor R17 is connected to one end of resistor R19 and the input interface. The other end of resistor R17 is connected to one end of resistor R18, one end of resistor R20, and the positive terminal of the input board. The negative terminal of the input board is grounded. The other end of resistor R18 is connected to one end of capacitor C14 and the main control circuit. The other end of resistor R19 is connected to the other end of capacitor C14 and the main control circuit. The other end of resistor R20 is connected to one end of resistor R21, one end of capacitor C15, and the main control circuit. The other end of resistor R21 and capacitor C15 are grounded.

2. The emergency external output device according to claim 1, characterized in that, The output detection circuit includes resistors R9, R11, R12, R15, and R16, and capacitors C11 and C13. One end of resistor R9 is connected to one end of resistor R12 and the output interface. The other end of resistor R9 is connected to one end of resistor R11, one end of resistor R15, and the positive terminal of the output board. The negative terminal of the output board is grounded. The other end of resistor R11 is connected to one end of capacitor C11 and the main control circuit. The other end of resistor R12 is connected to the other end of capacitor C11 and the main control circuit. The other end of resistor R15 is connected to one end of resistor R16, one end of capacitor C13, and the main control circuit. The other end of resistor R16 and capacitor C13 are grounded.

3. The emergency external output device according to claim 1 or 2, characterized in that, The emergency external output device also includes a display module, which is used to receive signals from the main control circuit and display the input and output voltage and current. The display module is connected to the main control circuit.

4. The emergency external output device according to claim 1 or 2, characterized in that, The emergency external output device also includes a button module, which is used to adjust the working state of the main control circuit by pressing the buttons. The button module is connected to the main control circuit.

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