Uninterrupted power supply (UPS) circuit compatible with different voltage inputs and power supply device

Abstract

The utility model relates to a UPS circuit compatible with different voltage inputs and a power supply device. The UPS circuit comprises an input port, an output port, a first switch assembly, a battery module, a control module and a voltage conversion module. The input port of the UPS circuit is connected with the output port of the UPS circuit through the first switch assembly. The input end of the voltage conversion module is connected with the input port and the battery module, and the output end of the voltage conversion module is connected with the output port; the control module is connected with the input port, the first switch assembly and the voltage conversion module. According to the UPS circuit, the input power supply is used for outputting the output power supply with the first voltage value, the input power supply is subjected to voltage conversion and then outputting the required output power supply, or the battery input of the battery module is subjected to voltage conversion and then outputting the required output power supply, so that the UPS circuit can be compatible with different voltage inputs and can also provide continuous output power supplies; and the reliability of equipment operation is ensured.

Description

Technical Field

[0001] The utility model relates to the field of uninterruptible power supply, in particular to a UPS circuit and a power supply device compatible with different voltage inputs. Background Art

[0002] A UPS (uninterruptible power supply) provides power to the load when the main power supply is normal. In the event of a main power outage or power outage, it provides emergency power to the load through a backup power source. A power adapter converts AC power to provide the required main power supply. Different power adapters on the market can provide different voltages, such as 12V or 20V. However, current DC UPS power supplies have a single input and output voltage, and can only accommodate a single main power supply voltage (e.g., 12V). They are incompatible with different voltages, impacting the user experience. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a UPS circuit and a power supply device that are compatible with different voltage inputs.

[0004] The technical solution adopted by the utility model to solve the technical problem is: to provide a UPS circuit compatible with different voltage inputs, including an input port, an output port, a first switch component, a battery module, a control module and a voltage conversion module;

[0005] The input port of the UPS circuit is connected to the output port of the UPS circuit through the first switch component; the input power connected to the input port passes through the first switch component to reach the output port, forming a first power loop;

[0006] The input end of the voltage conversion module is connected to the input port and the battery module, and the output end of the voltage conversion module is connected to the output port;

[0007] The voltage conversion module is connected to the input port or the battery module, respectively, converts the input power source or the battery input of the battery module into a first voltage value and transmits it to the output port, forming a second power circuit or a third power circuit respectively;

[0008] The control module is respectively connected to the input port, the first switch component and the voltage conversion module, and is used to detect the input voltage value of the input power supply, and control the first power circuit to provide the output port with an output power supply with a voltage value of the first voltage value when the input voltage value is equal to a first voltage value, and control the voltage conversion module to provide the output port with the output power supply when the input voltage value is not equal to the first voltage value.

[0009] Preferably, the UPS circuit further comprises: a second switch component, a third switch component and a fourth switch component;

[0010] The input port is connected to the input end of the voltage conversion module through the second switch component, the battery module is connected to the input end of the voltage conversion module through the fourth switch component, and the output end of the voltage conversion module is connected to the output port through the third switch component.

[0011] Preferably, the second switch component includes a diode D3, the anode of the diode D3 is connected to the input port, and the cathode of the diode D3 is connected to the voltage conversion module;

[0012] The third switch component includes a diode D4, the anode of the diode D4 is connected to the voltage conversion module, and the cathode of the diode D4 is connected to the output port;

[0013] The fourth switch component includes a diode D5, the anode of the diode D5 is connected to the battery module, and the cathode of the diode D5 is connected to the voltage conversion module.

[0014] Preferably, the second switch component includes an NMOS transistor Q3 and a first control unit for turning off the NMOS transistor Q3, wherein the source of the NMOS transistor Q3 is connected to the input port, the drain is connected to the voltage conversion module, and the gate is connected to the first control unit;

[0015] The third switch component includes a PMOS transistor Q4 and a second control unit for turning off the PMOS transistor Q4, wherein the drain of the PMOS transistor Q4 is connected to the voltage conversion module, the source is connected to the output port, and the gate is connected to the second control unit;

[0016] The fourth switch component includes an NMOS transistor Q5 and a third control unit for turning off the NMOS transistor Q5. The source of the NMOS transistor Q5 is connected to the battery module, the drain is connected to the voltage conversion module, and the gate is connected to the third control unit.

[0017] Preferably, the first switch component includes a PMOS transistor Q1 and a PMOS transistor Q2;

[0018] The drain of the PMOS transistor Q1 is connected to the input port, the gate is connected to the control module, and the source is connected to the source of the PMOS transistor Q2. The gate of the PMOS transistor Q2 is connected to the control module, and the drain is connected to the output port.

[0019] Preferably, the voltage conversion module includes a conversion chip, an input switch unit, a feedback unit and an energy storage unit; the input switch unit connects the conversion chip and the energy storage unit, the energy storage unit is connected to the conversion chip, and the feedback unit connects the conversion chip and the energy storage unit.

[0020] Preferably, the input switch unit includes an NMOS transistor Q7; the feedback unit includes an NMOS transistor Q6, a resistor R1, a resistor R2, and a resistor R3; the energy storage unit includes an NMOS transistor Q8, an inductor L1, and a capacitor C1;

[0021] The drain of the NMOS transistor Q7 is the input end of the voltage conversion module, the gate is connected to the conversion chip, and the source is connected to the output end of the voltage conversion module through the inductor L1;

[0022] The gate of the NMOS transistor Q8 is connected to the conversion chip, the drain is connected between the NMOS transistor Q7 and the inductor L1, and the source is grounded and connected between the inductor L1 and the output end of the voltage conversion module through the capacitor C1;

[0023] The gate of the NMOS transistor Q6 is connected to the conversion chip, the source is grounded through the resistor R3, the drain is connected to the conversion chip, grounded through the resistor R2, and connected between the inductor L1 and the output end of the voltage conversion module through the resistor R1.

[0024] Preferably, the battery input voltage of the battery module is between the first voltage value and a second voltage value, and the second voltage value is greater than the first voltage value.

[0025] Preferably, the input power source, the battery input and the output power source are direct current, and the voltage conversion module is a direct current-to-direct current voltage conversion module.

[0026] A power supply device is also provided, comprising a UPS circuit compatible with different voltage inputs as described above and an adapter connected to the input port of the UPS circuit, wherein the adapter converts the external power supply and provides input power to the UPS circuit.

[0027] The implementation of the UPS circuit and power supply device compatible with different voltage inputs of the utility model has the following beneficial effects: the UPS circuit can be compatible with different voltage inputs and can also provide continuous output power by using the input power supply to output an output power supply of a first voltage value, converting the input power supply to output the required output power, or converting the battery input of the battery module to output the required output power, thereby ensuring the reliability of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0029] Figure 1 This is a structural block diagram of an embodiment of a UPS circuit compatible with different voltage inputs of the present utility model;

[0030] Figure 2 This is a structural block diagram of another embodiment of a UPS circuit compatible with different voltage inputs of the present invention;

[0031] Figure 3 This is a structural block diagram of another embodiment of a UPS circuit compatible with different voltage inputs of the present invention;

[0032] Figure 4 This is a structural block diagram of another embodiment of a UPS circuit compatible with different voltage inputs of the present invention;

[0033] Figure 5 This is a circuit diagram of a voltage conversion module according to an embodiment of the present invention;

[0034] Figure 6 This is a circuit diagram of a first switch assembly according to an embodiment of the present invention;

[0035] Figure 7 It is a structural block diagram of an embodiment of a power supply device of the present utility model. DETAILED DESCRIPTION

[0036] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.

[0037] like Figure 1 As shown, in one embodiment of the UPS circuit of the present invention that is compatible with different voltage inputs, it includes an input port 11 , an output port 12 , a first switch component 13 , a battery module 16 , a control module 14 and a voltage conversion module 15 .

[0038] The input port 11 of the UPS circuit is connected to the output port 12 of the UPS circuit via a first switch assembly 13. Input power connected to the input port 11 passes through the first switch assembly 13 and reaches the output port 12, forming a first power circuit. The input end of the voltage conversion module 15 is connected to the input port 11 and the battery module 16, while the output end of the voltage conversion module 15 is connected to the output port 12. The voltage conversion module 15 is connected to the input port 11, converting the input power to a first voltage value before transmitting it to the output port 12, forming a second power circuit. The voltage conversion module 15 is connected to the battery module 16, converting the battery input from the battery module 16 to a first voltage value before transmitting it to the output port 12, forming a third power circuit. The control module 14 is connected to the input port 11, the first switch assembly 13, and the voltage conversion module 15, respectively. It is configured to detect the input voltage of the input power and, when the input voltage is equal to the first voltage value, control the first power circuit to provide output power at the first voltage value to the output port 12. It also controls the voltage conversion module 15 to provide output power at the output port 12 when the input voltage is not equal to the first voltage value.

[0039] The UPS circuit of this embodiment is a DC UPS circuit, which is used to continuously output a DC output power supply of a first voltage value. The input power supply, battery input and output power supply are all DC power. The voltage conversion module is a DC-DC step-down module, which is used to perform voltage conversion. The input port of the UPS circuit is connected to an external DC input power supply. The input power supply can be obtained after conversion by a power adapter or directly provided by an external DC power supply. This embodiment does not limit this, as long as a DC input can be provided. Preferably, the battery module serves as a backup power supply, and its battery input voltage is between a first voltage value and a second voltage value, and the second voltage value is greater than the first voltage value. Preferably, the second voltage value is slightly less than the maximum value of the external input power supply of different voltage levels when normally input.

[0040] The control module 14 collects input power from the input port 11 for detection to obtain its input voltage value. When the input voltage value of the input power is equal to the required first voltage value, the control module 14 turns on the first power circuit by turning on the first switch component 13, and disconnects the second power circuit and the third power circuit, and directly uses the input power to provide the required output power without the need for voltage value conversion. When the input voltage value is not equal to the first voltage value, the control module 14 disconnects the first switch component 13 to disconnect the first power circuit. At this time, the higher voltage of the input power supply and the battery input is stepped down by the voltage conversion module 15 to provide the required output power, thereby providing output power through the second power circuit or the third power circuit. The external load is connected to the output port 12 to obtain the output power. Among them, the control module 14 can adopt an MCU microcontroller with model GD32F303RCT6.

[0041] While existing technologies only support a single input voltage, the UPS circuit of this embodiment uses input power to provide output power through either the first or second power circuit, achieving compatibility with different input voltages while providing a single output voltage. Furthermore, the battery module ensures continuous output power even when the input power fails, ensuring reliable operation.

[0042] Furthermore, in other embodiments, the battery input provided by the battery module may also be AC power. In this case, the voltage conversion module includes a DC-DC step-down module and an AC-DC step-down module. The DC-DC step-down module is used when the second power circuit is on, and the AC-DC step-down module is used when the third power circuit is on.

[0043] Further, if Figure 2As shown, the UPS circuit further includes: a second switch assembly 17, a third switch assembly 19, and a fourth switch assembly 18; the input port 11 is connected to the input end of the voltage conversion module 15 via the second switch assembly 17, the battery module 16 is connected to the input end of the voltage conversion module 15 via the fourth switch assembly 18, and the output end of the voltage conversion module 15 is connected to the output port 12 via the third switch assembly 19. Specifically, the input port 11 is connected to the input end of the voltage conversion module 15 via the second switch assembly 17, and the battery module 16 is connected between the voltage conversion module 15 and the second switch assembly 17 via the fourth switch assembly 18. The second switch assembly 17 and the fourth switch assembly 18 form a circuit switching module that can implement switching between the second power circuit and the third power circuit.

[0044] In an alternative embodiment, if Figure 3 As shown, the second switch assembly 17 includes a diode D3, with the anode of diode D3 connected to the input port 11 and the cathode of diode D3 connected to the voltage conversion module 15. The third switch assembly 19 includes a diode D4, with the anode of diode D4 connected to the voltage conversion module 15 and the cathode of diode D4 connected to the output port 12. The fourth switch assembly 18 includes a diode D5, with the anode of diode D5 connected to the battery module 16 and the cathode of diode D5 connected to the voltage conversion module 15.

[0045] The existing technology generally switches to a backup power source within 10ms when the input power fails. The UPS circuit of this embodiment can also achieve a backup power source switch within 1ms or less when the input power fails, reducing the risk of load power outage. The following example uses a first voltage value of 12V and an input port that can be connected to a 12V adapter and a 20V input adapter as an example to illustrate the working principle of the UPS circuit of this embodiment that is compatible with different voltage inputs:

[0046] When using a 12V adapter, if the 12V DC input is normal, the control module controls the first switch component to conduct, providing 12V DC to the output port, and adjusts the output voltage of the voltage conversion module to below 12V, causing diode D4 to reversely block, thereby disconnecting the second and third power circuits. If the 12V adapter input loses power, the control module controls the first switch component to disconnect, thereby disconnecting the first power circuit, and simultaneously adjusts the output voltage of the voltage conversion module to stabilize at 12V, causing diode D4 to conduct. The input power flows to diode D3, and the battery input flows to diode D5. Because the input power is lower than the battery input, diode D3 is reversely blocked, disconnecting the second power circuit, and the third power circuit is turned on to provide 12V output power to the output port, preventing external loads from losing power.

[0047] When using a 20V adapter and receiving a normal 20V DC input, the control module controls the first switch assembly to open, thereby disconnecting the first power circuit. Simultaneously, the output voltage of the voltage conversion module is stabilized at 12V, causing diode D4 to conduct. Input power flows to diode D3, and the battery input flows to diode D5. Because the input power is higher than the battery input, diode D5 is reverse-blocked, disconnecting the third power circuit and enabling the second power circuit to provide 12V output power to the output port. If the 20V adapter input loses power, the diode corresponding to the higher voltage between the input power and the battery input conducts, while the other diode reverse-blocks, allowing the corresponding power circuit to conduct and supply power.

[0048] In another alternative embodiment, if Figure 4 As shown, the second switch assembly 17 includes an NMOS transistor Q3 and a first control unit N1 for turning off NMOS transistor Q3. The source of NMOS transistor Q3 is connected to the input port 11, the drain is connected to the voltage conversion module 15, and the gate is connected to the first control unit N1. The third switch assembly 19 includes a PMOS transistor Q4 and a second control unit N2 for turning off PMOS transistor Q4. The drain of PMOS transistor Q4 is connected to the voltage conversion module 15, the source is connected to the output port 12, and the gate is connected to the second control unit N2. The fourth switch assembly 18 includes an NMOS transistor Q5 and a third control unit N3 for turning off NMOS transistor Q5. The source of NMOS transistor Q5 is connected to the battery module 16, the drain is connected to the voltage conversion module 15, and the gate is connected to the third control unit N3. Specifically, the first and third control units can use reverse polarity protection diode controllers, such as the reverse polarity protection intelligent diode controller model LM74610-Q1. The second control unit includes an NMOS transistor with its source connected to ground, its gate connected to the control module, and its drain connected to the gate of PMOS transistor Q4.

[0049] It can be understood that due to the presence of body diodes in the NMOS and PMOS transistors, the cut-off NMOS transistors Q3, NMOS transistors Q5, and PMOS transistors Q4 are each equivalent to a diode. The working principle of the UPS circuit compatible with different voltage inputs in this embodiment can refer to the working principle of each switch component directly using a diode, which is not elaborated here.

[0050] In other optional embodiments, the second switch component 17, the third switch component 19 and the fourth switch component 18 may also be implemented in other ways.

[0051] Further, if Figure 6As shown, the first switch component 13 includes a PMOS transistor Q1 and a PMOS transistor Q2. The drain of the PMOS transistor Q1 is connected to the input port 11, the gate is connected to the control module 14, and the source is connected to the source of the PMOS transistor Q2. The gate of the PMOS transistor Q2 is connected to the control module 14, and the drain is connected to the output port 12. This embodiment uses a common-source PMOS transistor reverse series structure as the first switch component 13, which can achieve bidirectional current blocking, low conduction loss, fast switching speed and small volume. Specifically, the first switch component 13 also includes a bypass control unit, and the specific structure of the bypass control unit can refer to the prior art. The control module 14 is connected to the bypass control unit, and the bypass control unit turns off the PMOS transistor Q1 and turns on the PMOS transistor Q2 to achieve the conduction of the first switch component 13, and the bypass control unit turns off the PMOS transistor Q1 and turns off the PMOS transistor Q2 to achieve the disconnection of the first switch component 13.

[0052] In other embodiments, the first switch component 13 may also be a transistor.

[0053] Furthermore, the voltage conversion module 15 includes a conversion chip, an input switch unit, a feedback unit, and an energy storage unit. The input switch unit connects the conversion chip and the energy storage unit, and also connects the input port 11 and the battery module 16. The energy storage unit connects the conversion chip; and the feedback unit connects the conversion chip and the energy storage unit. The input switch unit is used to connect and disconnect the input port 11 and the battery module 16. The energy storage unit is used to store and release electrical energy. The feedback unit is used to implement feedback control of the output voltage.

[0054] Specifically, if Figure 5 As shown, the input switch unit includes an NMOS transistor Q7; the feedback unit includes an NMOS transistor Q6, resistors R1, R2, and R3; and the energy storage unit includes an NMOS transistor Q8, an inductor L1, and a capacitor C1. The conversion chip can be an SC8002QDKR power switch chip. The gate of NMOS transistor Q7 is connected to the HD terminal of the conversion chip, the source is connected to the output terminal of the voltage conversion module 15 through the inductor L1, and the drain serves as the input terminal of the voltage conversion module 15 and is also connected to the input port 11 and the battery module 16. The gate of NMOS transistor Q8 is connected to the LD terminal of the conversion chip, the drain is connected between NMOS transistor Q7 and the inductor L1, the source is grounded, and connected between the inductor L1 and the output terminal of the voltage conversion module 15 through the capacitor C1. The gate of NMOS transistor Q6 is connected to the control module 14, the source is grounded through the resistor R3, and the drain is connected to the FB terminal of the conversion chip, grounded through the resistor R2, and connected between the inductor L1 and the output terminal of the voltage conversion module 15 through the resistor R1. The EN terminal of the conversion chip is connected to the control module 14.

[0055] The control module 14 can adjust the voltage amplitude output by the voltage conversion module 15 by switching the NMOS transistor Q6. Specifically, the control module 14 controls the NMOS transistor Q6 to be turned off, causing the voltage output by the voltage conversion module to be slightly lower than the first voltage value; the control module 14 controls the NMOS transistor Q6 to be turned on, causing the voltage output by the voltage conversion module to increase and stabilize at the first voltage value. Therefore, the switching of the NMOS transistor Q6 can open or close the second and third power loops.

[0056] It is understandable that the voltage conversion module 15 may also adopt other circuit structures. Please refer to the prior art for details.

[0057] like Figure 7 As shown, in one embodiment of the power supply device provided by the present invention, it includes a UPS circuit compatible with different voltage inputs according to any of the above embodiments and an adapter connected to the input port of the UPS circuit. The adapter is fixedly connected or detachably connected to the UPS circuit. The adapter converts the external power supply into direct current and provides input power to the UPS circuit. The UPS circuit is connected to the load to provide uninterrupted power to the load. Preferably, the input power that the adapter can provide under normal circumstances should not be lower than the output power required by the UPS circuit. When the output voltage required by the UPS circuit is 12V, the normal output voltage of the adapter can be 12V, 20V or other voltage values higher than 12V.

[0058] The utility model can achieve compatibility with inputs of different voltage levels and outputs of a single voltage level. The specific voltage level value can be determined according to actual needs. Furthermore, the utility model can also achieve rapid switching of power circuits when the adapter loses power to ensure power supply stability.

[0059] It can be understood that the above embodiments only express a part of the implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the utility model. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of coverage of the claims of the utility model.

Claims

1. A UPS circuit compatible with different voltage inputs, characterized in that: It includes an input port, an output port, a first switch component, a battery module, a control module and a voltage conversion module; The input port of the UPS circuit is connected to the output port of the UPS circuit through the first switch component; the input power connected to the input port passes through the first switch component to reach the output port, forming a first power loop; The input end of the voltage conversion module is connected to the input port and the battery module, and the output end of the voltage conversion module is connected to the output port; The voltage conversion module is connected to the input port or the battery module, respectively, converts the input power source or the battery input of the battery module into a first voltage value and transmits it to the output port, forming a second power circuit or a third power circuit respectively; The control module is respectively connected to the input port, the first switch component and the voltage conversion module, and is used to detect the input voltage value of the input power supply, and control the first power circuit to provide the output port with an output power supply with a voltage value of the first voltage value when the input voltage value is equal to a first voltage value, and control the voltage conversion module to provide the output port with the output power supply when the input voltage value is not equal to the first voltage value.

2. The UPS circuit compatible with different voltage inputs according to claim 1, characterized in that: The UPS circuit further includes: a second switch assembly, a third switch assembly, and a fourth switch assembly; The input port is connected to the input end of the voltage conversion module through the second switch component, the battery module is connected to the input end of the voltage conversion module through the fourth switch component, and the output end of the voltage conversion module is connected to the output port through the third switch component.

3. The UPS circuit compatible with different voltage inputs according to claim 2, characterized in that: The second switch component includes a diode D3, the anode of the diode D3 is connected to the input port, and the cathode of the diode D3 is connected to the voltage conversion module; The third switch component includes a diode D4, the anode of the diode D4 is connected to the voltage conversion module, and the cathode of the diode D4 is connected to the output port; The fourth switch component includes a diode D5, the anode of the diode D5 is connected to the battery module, and the cathode of the diode D5 is connected to the voltage conversion module.

4. The UPS circuit compatible with different voltage inputs according to claim 2, characterized in that: The second switch component includes an NMOS transistor Q3 and a first control unit for turning off the NMOS transistor Q3, wherein the source of the NMOS transistor Q3 is connected to the input port, the drain is connected to the voltage conversion module, and the gate is connected to the first control unit; The third switch component includes a PMOS transistor Q4 and a second control unit for turning off the PMOS transistor Q4, wherein the drain of the PMOS transistor Q4 is connected to the voltage conversion module, the source is connected to the output port, and the gate is connected to the second control unit; The fourth switch component includes an NMOS transistor Q5 and a third control unit for turning off the NMOS transistor Q5. The source of the NMOS transistor Q5 is connected to the battery module, the drain is connected to the voltage conversion module, and the gate is connected to the third control unit.

5. The UPS circuit compatible with different voltage inputs according to claim 1, characterized in that: The first switch component includes a PMOS transistor Q1 and a PMOS transistor Q2; The drain of the PMOS transistor Q1 is connected to the input port, the gate is connected to the control module, and the source is connected to the source of the PMOS transistor Q2. The gate of the PMOS transistor Q2 is connected to the control module, and the drain is connected to the output port.

6. The UPS circuit compatible with different voltage inputs according to claim 1, characterized in that: The voltage conversion module includes a conversion chip, an input switch unit, a feedback unit and an energy storage unit; the input switch unit is connected to the conversion chip and the energy storage unit, the energy storage unit is connected to the conversion chip, and the feedback unit is connected to the conversion chip and the energy storage unit.

7. The UPS circuit compatible with different voltage inputs according to claim 6, characterized in that: The input switch unit includes an NMOS transistor Q7; the feedback unit includes an NMOS transistor Q6, a resistor R1, a resistor R2, and a resistor R3; the energy storage unit includes an NMOS transistor Q8, an inductor L1, and a capacitor C1; The drain of the NMOS transistor Q7 is the input end of the voltage conversion module, the gate is connected to the conversion chip, and the source is connected to the output end of the voltage conversion module through the inductor L1; The gate of the NMOS transistor Q8 is connected to the conversion chip, the drain is connected between the NMOS transistor Q7 and the inductor L1, and the source is grounded and connected between the inductor L1 and the output end of the voltage conversion module through the capacitor C1; The gate of the NMOS transistor Q6 is connected to the conversion chip, the source is grounded through the resistor R3, the drain is connected to the conversion chip, grounded through the resistor R2, and connected between the inductor L1 and the output end of the voltage conversion module through the resistor R1.

8. The UPS circuit compatible with different voltage inputs according to claim 1, characterized in that: The battery input voltage of the battery module is between the first voltage value and a second voltage value, and the second voltage value is greater than the first voltage value.

9. The UPS circuit compatible with different voltage inputs according to claim 1, characterized in that: The input power supply, the battery input and the output power supply are direct current, and the voltage conversion module is a direct current-to-direct current voltage conversion module.

10. A power supply device, characterized in that: It comprises a UPS circuit compatible with different voltage inputs as described in any one of claims 1-9 and an adapter connected to the input port of the UPS circuit, wherein the adapter converts external power to provide input power for the UPS circuit.

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