Power conversion circuit and portable power supply device

Abstract

The utility model discloses a power supply conversion circuit and a portable power supply device, comprising an input unit comprising a 220V commercial power, a storage battery and a solar cell; the processing unit comprises an input power supply switching circuit, a charging management circuit and a power supply switching circuit which are connected with the output end of the input power supply switching circuit, and a voltage conversion circuit connected with the output end of the power supply switching circuit; the output unit comprises a direct current 24V output end, a direct current 12V output end and a direct current 3.3 V output end of a direct current 5V output end which are connected with the output end of the voltage conversion circuit; the processing unit receives various input power supplies from the input unit, converts and reduces the voltage, and transmits the power supplies to the output end of the output unit. The beneficial effects of the utility model are that three different power supplies can be accessed at the same time, and the priority of the power supplies can be automatically selected through the processing unit, so that the optimal power supply can be preferentially used under different conditions, and high-efficiency, high-safety and high-availability power supply is realized.

Description

Technical Field

[0001] This utility model relates to the field of power supply technology, and in particular to a power conversion circuit and a portable power supply device. Background Technology

[0002] Hydropower projects are often located in remote areas. If monitoring is carried out on parts of the project during the construction and operation and maintenance periods, the continuous monitoring time is usually calculated in days or months. Therefore, it is necessary to provide a continuous and stable power supply for the monitoring equipment.

[0003] Traditional power adapters mostly rely on a single 220V AC mains power supply, limiting their use in areas without mains power. For example, the patent "A Portable Power Adapter" [Authorization Announcement No. CN216774602U] uses 220V AC mains power as its input power, making it only suitable for environments with AC mains power. The patent "A Portable Power Adapter" [Authorization Announcement No. CN216774602U] uses a built-in rechargeable lithium battery as its input power, and the device is powered by a rechargeable battery, but it cannot work after the battery is depleted. The patent "A Portable Power Device" [Authorization Announcement No. CN218586926U] proposes using multiple power supply methods, including new energy sources (solar energy, wind energy), AC mains power, high-frequency AC power, and rechargeable batteries, as input power, but it is mainly used in fixed environments. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems existing in the above or prior art, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a power conversion circuit and a portable power supply device, which supports a single 220V AC mains power, solar cell or battery, and can use all three in combination. It has the function of intelligently switching power supply and outputs low-voltage DC power of 24V, 12V and 5V. It is easy to carry and can provide a continuous and stable power supply for commonly used low-voltage electrical equipment.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a power conversion circuit, comprising an input unit including a 220V AC mains power, a storage battery, and a solar cell; a processing unit including an input power switching circuit, a charging management circuit and a power supply switching circuit connected to the output terminal of the input power switching circuit, and a voltage conversion circuit connected to the output terminal of the power supply switching circuit; an output unit including a DC 24V output terminal, a DC 12V output terminal, a DC 5V output terminal, and a DC 3.3V output terminal connected to the output terminal of the voltage conversion circuit; the processing unit receives multiple input power sources from the input unit, converts and steps down the voltage, and then transmits them to the output terminals of the output unit respectively.

[0008] In a preferred embodiment of the power conversion circuit described in this utility model, the processing unit further includes a controller connected to the input terminal of the input power switching circuit; the controller input terminal is also provided with a first knob, and the controller output terminal is also provided with a first display screen.

[0009] In a preferred embodiment of the power conversion circuit described in this utility model, the processing unit further includes a voltage regulator circuit and an AC / DC rectifier and filter circuit; the input terminal of the voltage regulator circuit is connected to the 220V mains power, the output terminal of the voltage regulator circuit is connected to the input terminal of the AC / DC rectifier and filter circuit, and the output terminal of the AC / DC rectifier and filter circuit is connected to the input power switching circuit.

[0010] In a preferred embodiment of the power conversion circuit described in this utility model, the processing unit further includes a surge suppressor and a DC / DC conversion circuit; the input terminal of the surge suppressor is connected to the output terminal of the solar cell, the output terminal of the surge suppressor is connected to the input terminal of the DC / DC conversion circuit, and the output terminal of the DC / DC conversion circuit is connected to the input power switching circuit.

[0011] In a preferred embodiment of the power conversion circuit described in this utility model, the processing unit further includes a battery detection circuit connected to the battery input terminal; the battery output terminal is also connected to the controller.

[0012] In a preferred embodiment of the power conversion circuit described in this utility model, the processing unit further includes a voltage and current monitoring circuit; the input terminal of the voltage and current monitoring circuit is connected to the output terminal of the 220V mains power and the output terminal of the surge suppressor, respectively; the output terminal of the voltage and current monitoring circuit is connected to the controller.

[0013] In a preferred embodiment of the power conversion circuit described in this utility model, the input terminal of the power supply switching circuit is connected to the output terminal of the controller, the output terminal of the charging management circuit, and the output terminal of the battery, respectively.

[0014] In a preferred embodiment of the power conversion circuit described in this utility model, the following configuration is provided: a first load protection circuit is connected to the DC 24V output terminal, the first load protection circuit is also connected to a first switch, and the first switch is also connected to a first load; a second load protection circuit is connected to the DC 12V output terminal, the second load protection circuit is also connected to a second switch, and the second switch is also connected to a second load; a third load protection circuit is connected to the DC 5V output terminal, the third load protection circuit is also connected to a third switch, and the third switch is also connected to a third load; and the input terminals of the first switch, the second switch, and the third switch are also simultaneously connected to the output terminal of the controller.

[0015] In a preferred embodiment of the power conversion circuit described in this utility model, when multiple input power sources are mixed and connected to the input unit, the controller automatically selects the priority order of the power supply as: 220V AC mains power > solar cell > storage battery.

[0016] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a portable power supply device, comprising a power conversion circuit; and,

[0017] The portable power supply has a power input interface, an output interface, a switch, and a grounding interface on one side, and a second display screen and a second knob on the other side. A handle is located on the top of the portable power supply, and four sets of rubber feet are located on the bottom. Two sets of ventilation holes are symmetrically arranged on each side of the portable power supply. The power input interfaces include a 220V AC mains input interface, a battery input interface, and a solar panel input interface. The output interfaces include a 24V DC output interface, a 12V DC output interface, and a 5V DC output interface.

[0018] The beneficial effects of this utility model are as follows: This utility model simultaneously connects to three different power sources—220V AC mains, a storage battery, and a solar cell—and achieves switching between these different power sources through an input power switching circuit, enabling diversified power selection. The inclusion of a charging management circuit and a power supply switching circuit ensures stable power supply and rational allocation. A voltage regulator circuit ensures stable input of the 220V AC mains power, while a surge suppressor and DC / DC converter circuit convert the solar cell's output voltage to the voltage required by the circuit, improving circuit safety and adaptability. A battery detection circuit for the storage battery input power source enhances the intelligence and safety of the power management system. The entire power switching process automatically selects the priority order of the power supply through the controller, improving energy utilization efficiency and ensuring the optimal power source is used under different power conditions. The overall circuit and device, through its diversified input power selection, achieves high-efficiency, high-safety, and high-availability power supply, meeting the power needs of different users and in different environments. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0020] Figure 1 This is a power conversion circuit module diagram for a power conversion circuit and a portable power supply device.

[0021] Figure 2 This is a structural diagram of a power conversion circuit and a portable power supply device.

[0022] Figure 3 This is a structural diagram of a power conversion circuit and a portable power supply device. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0026] Example 1

[0027] Reference Figure 1 This is the first embodiment of the present invention. This embodiment provides a power conversion circuit, which includes an input unit 100 that inputs power into the power input section of the power conversion circuit; a processing unit 200 that is responsible for power conversion, management and distribution; and an output unit 300 that outputs the power converted by the processing unit 200 to loads of different voltage levels.

[0028] Furthermore, the input unit 100 includes a 220V AC mains power 101, a storage battery 102, and a solar cell 103; the processing unit 200 includes an input power switching circuit 201, a charging management circuit 202 and a power supply switching circuit 203 connected to the output terminal of the input power switching circuit 201, and a voltage conversion circuit 204 connected to the output terminal of the power supply switching circuit 203; the output unit 300 includes a DC 24V output terminal 301, a DC 12V output terminal 302, a DC 5V output terminal 303, and a DC 3.3V output terminal 304 connected to the output terminal of the voltage conversion circuit 204; the processing unit 200 receives various input power sources from the input unit 100, converts and steps down the voltage, and then transmits them to the output terminals of the output unit 300 respectively.

[0029] Furthermore, when multiple input power sources are connected to the input unit 100, the controller 205 automatically selects the priority order of the power supply as follows: 220V AC mains power > 101 solar cell 103 > battery 102.

[0030] This invention allows for simultaneous access to three different power sources: 220V AC mains, a battery, and a solar cell. An input power switching circuit enables switching between these power sources, providing diverse power options. A charging management circuit and a power supply switching circuit ensure stable power supply and efficient allocation. A voltage regulator circuit ensures a stable 220V AC mains input. A surge suppressor and a DC / DC converter convert the solar cell's output voltage to the required circuit voltage, improving circuit safety and adaptability. A battery detection circuit enhances the intelligence and safety of the power management system. The entire power switching process automatically selects the priority of power sources through the controller, improving energy efficiency and ensuring the optimal power source is used under different conditions. The overall circuit and device, through its diverse input power selection, achieve high-efficiency, high-safety, and high-availability power supply, meeting the power needs of different users and in different environments.

[0031] In summary, the beneficial effects of a power conversion circuit and portable power supply device are as follows: the input unit enables diverse power access, improving power availability and flexibility; the processing unit enables intelligent power management and efficient conversion, improving energy utilization efficiency and circuit adaptability; and the controller automatically selects the priority order of power supplies, optimizing the power usage sequence and improving energy utilization efficiency. The overall device achieves the beneficial effect of prioritizing the use of the optimal power supply under different power conditions.

[0032] Example 2

[0033] Reference Figure 1This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a power conversion circuit, which includes a processing unit 200 that ensures stable power supply and reasonable distribution through an input power switching circuit, a charging management circuit and a power supply switching circuit, and converts the input power to the required voltage level through a voltage conversion circuit.

[0034] Furthermore, the processing unit 200 also includes a controller 205 connected to the input terminal of the input power switching circuit 201; the input terminal of the controller 205 is also provided with a first knob 205a, and the output terminal of the controller 205 is also provided with a first display screen 205b.

[0035] Furthermore, the processing unit 200 also includes a voltage regulator circuit 206 and an AC / DC rectifier and filter circuit 207; the input terminal of the voltage regulator circuit 206 is connected to the 220V mains power 101, the output terminal of the voltage regulator circuit 206 is connected to the input terminal of the AC / DC rectifier and filter circuit 207, and the output terminal of the AC / DC rectifier and filter circuit 207 is connected to the input power switching circuit 201.

[0036] Furthermore, the processing unit 200 also includes a surge suppressor 208 and a DC / DC conversion circuit 209; the input terminal of the surge suppressor 208 is connected to the output terminal of the solar cell 103, the output terminal of the surge suppressor 208 is connected to the input terminal of the DC / DC conversion circuit 209, and the output terminal of the DC / DC conversion circuit 209 is connected to the input power switching circuit 201.

[0037] Furthermore, the processing unit 200 also includes a battery detection circuit 210 connected to the input terminal of the battery 102; the output terminal of the battery 102 is also connected to the controller 205.

[0038] Furthermore, the processing unit 200 also includes a voltage and current monitoring circuit 211; the input terminal of the voltage and current monitoring circuit 211 is connected to the output terminal of the 220V mains power 101 and the output terminal of the surge suppressor 208, respectively; the output terminal of the voltage and current monitoring circuit 211 is connected to the controller 205.

[0039] Furthermore, the input terminal of the power supply switching circuit 203 is connected to the output terminal of the controller 205, the output terminal of the charging management circuit 202, and the output terminal of the battery 102, respectively.

[0040] Furthermore, the DC 24V output terminal 301 is connected to a first load protection circuit 301a, which is also connected to a first switch 301b, and the first switch 301b is also connected to a first load 301c; the DC 12V output terminal 302 is connected to a second load protection circuit 302a, which is also connected to a second switch 302b, and the second switch 302b is also connected to a second load 302c; the DC 5V output terminal 303 is connected to a third load protection circuit 303a, which is also connected to a third switch 303b, and the third switch 303b is also connected to a third load 303c; and the input terminals of the first switch 301b, the second switch 302b, and the third switch 303b are also simultaneously connected to the output terminal of the controller 205.

[0041] In use, the input power switching circuit 201 can select the input power from the 220V AC mains power 101 and the solar cell 103, and can also provide power for charging the battery 102.

[0042] When in use, the charging management circuit 202 can automatically start charging the battery 102 when the battery 102 is low on power, and automatically stop charging the battery 102 when the battery 102 is fully charged to prevent overcharging.

[0043] In use, the power supply switching circuit 203 can select the input power supply from the output power supply of the input power switching circuit 201 and provide power to the power supply voltage conversion circuit 203.

[0044] During use, the controller 205 selects a suitable power supply for the power supply device by controlling the input power switching circuit 201 and the power supply switching circuit 203 based on the monitoring data.

[0045] During use, the voltage regulator circuit 206 and the AC / DC rectifier and filter circuit 207 work together to ensure a stable input of 220V AC mains power. The AC / DC rectifier and filter circuit 207 converts AC power into DC power, providing a clean power supply for subsequent circuits.

[0046] In use, the surge suppressor 208 and the DC / DC conversion circuit 209 together ensure a stable input to the solar cell 103. The surge suppressor 208 protects the circuit from possible surge current damage at the output of the solar cell, and the DC / DC conversion circuit 209 converts the output voltage of the solar cell into the voltage required by the circuit.

[0047] During use, the battery detection circuit 210 monitors the status of the battery to ensure that it operates in a safe and effective condition.

[0048] In use, the voltage and current monitoring circuit 211 can collect the voltage and current information input from the 220V mains power 101 and the solar cell 103, and transmit it to the controller 205 for processing, in order to monitor the power supply status of the 220V mains power 101 and the solar cell 103.

[0049] In summary, the beneficial effects of this power conversion circuit and portable power supply device are as follows: The input power switching circuit enables switching between different input power sources; the charging management circuit and the power supply switching circuit ensure stable power supply and reasonable distribution; and the voltage conversion circuit converts the input power to the required voltage level and transmits it to the output unit. The overall circuit achieves intelligent power management and efficient conversion, improves energy utilization efficiency and circuit adaptability, and can stably output the required voltage under different input power conditions.

[0050] Example 3

[0051] Reference Figures 2-3 This is the third embodiment of the present invention. This embodiment provides a portable power supply device, which includes a power input interface 401, an output interface 402, a switch 403, and a grounding interface 404 on one side of the portable power supply device 400. A second display screen 405 and a second knob 406 are also provided on the other side of the portable power supply device 400. A handle 407 is provided on the top of the portable power supply device 400, and four sets of rubber feet 408 are provided on the bottom of the portable power supply device 400.

[0052] Furthermore, two sets of heat dissipation holes 409 are symmetrically arranged on both sides of the portable power supply device 400. Furthermore, the power input interface 401 includes a 220V AC mains input interface 401a, a battery input interface 401b, and a solar cell input interface 401c.

[0053] Furthermore, the output interface 402 includes a DC 24V output interface 402a, a DC 12V output interface 402b, and a DC 5V output interface 402c.

[0054] It should be noted that the portable power supply unit 400 also contains a circuit board and a cooling fan, and each module is connected to the circuit board via a cable.

[0055] It should be noted that the main structure of the portable power supply 400 is made of lightweight and durable materials, such as aluminum alloy or high-strength plastic, to ensure portability and durability.

[0056] When in use, connect the power supply through the power input interface 401 and the load through the output interface 402. Turn on the switch 403 of the portable power device 400. After the power supply is connected, select the input power type through the second knob 406 and view it through the second display screen 405. The output power can be adjusted by the second knob 406 to adjust the output voltage and current and view it through the second display screen 405.

[0057] In summary, this portable power supply device is simple in design and easy to carry. It can power small devices that require short-term or long-term power, providing a multifunctional, efficient, and safe power solution suitable for outdoor work, emergencies, and daily power needs.

[0058] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0059] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0060] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A power conversion circuit, characterized in that: include, The input unit (100) includes a 220V AC mains power supply (101), a storage battery (102), and a solar cell (103); The processing unit (200) includes an input power switching circuit (201), a charging management circuit (202) and a power supply switching circuit (203) connected to the output terminal of the input power switching circuit (201), and a voltage conversion circuit (204) connected to the output terminal of the power supply switching circuit (203). The output unit (300) includes a DC 24V output terminal (301), a DC 12V output terminal (302), a DC 5V output terminal (303), and a DC 3.3V output terminal (304) connected to the output terminal of the voltage conversion circuit (204); The processing unit (200) receives multiple input power supplies from the input unit (100), converts and steps down the voltage, and then transmits them to the output terminal of the output unit (300).

2. The power conversion circuit as described in claim 1, characterized in that: The processing unit (200) also includes a controller (205) connected to the input terminal of the input power switching circuit (201); The controller (205) is further provided with a first knob (205a) at its input end and a first display screen (205b) at its output end.

3. The power conversion circuit as described in claim 2, characterized in that: The processing unit (200) also includes a voltage regulator circuit (206) and an AC / DC rectifier filter circuit (207); The input terminal of the voltage regulator circuit (206) is connected to the 220V mains power (101), the output terminal of the voltage regulator circuit (206) is connected to the input terminal of the AC / DC rectifier and filter circuit (207), and the output terminal of the AC / DC rectifier and filter circuit (207) is connected to the input power switching circuit (201).

4. The power conversion circuit as described in claim 3, characterized in that: The processing unit (200) also includes a surge suppressor (208) and a DC / DC conversion circuit (209); The input terminal of the surge suppressor (208) is connected to the output terminal of the solar cell (103), the output terminal of the surge suppressor (208) is connected to the input terminal of the DC / DC conversion circuit (209), and the output terminal of the DC / DC conversion circuit (209) is connected to the input power switching circuit (201).

5. The power conversion circuit as described in claim 4, characterized in that: The processing unit (200) also includes a battery detection circuit (210) connected to the input terminal of the battery (102); The output terminal of the battery (102) is also connected to the controller (205).

6. The power conversion circuit as described in claim 5, characterized in that: The processing unit (200) also includes a voltage and current monitoring circuit (211); The input terminal of the voltage and current monitoring circuit (211) is connected to the output terminal of the 220V mains power (101) and the output terminal of the surge suppressor (208), respectively. The output of the voltage and current monitoring circuit (211) is connected to the controller (205).

7. The power conversion circuit as described in claim 6, characterized in that: The input terminal of the power supply switching circuit (203) is connected to the output terminal of the controller (205), the output terminal of the charging management circuit (202), and the output terminal of the battery (102), respectively.

8. The power conversion circuit as described in claim 7, characterized in that: The DC 24V output terminal (301) is connected to a first load protection circuit (301a), the first load protection circuit (301a) is also connected to a first switch (301b), and the first switch (301b) is also connected to a first load (301c). The DC 12V output terminal (302) is connected to a second load protection circuit (302a), the second load protection circuit (302a) is also connected to a second switch (302b), and the second switch (302b) is also connected to a second load (302c); The DC 5V output terminal (303) is connected to a third load protection circuit (303a), the third load protection circuit (303a) is also connected to a third switch (303b), and the third switch (303b) is also connected to a third load (303c). Furthermore, the input terminals of the first switch (301b), the second switch (302b), and the third switch (303b) are also connected to the output terminal of the controller (205).

9. The power conversion circuit as described in claim 8, characterized in that: When multiple input power sources are mixed and connected to the input unit (100), the controller (205) automatically selects the priority order of the power supply as follows: 220V AC mains power (101) > battery (102) > solar cell (103).

10. A portable power supply device (400), characterized in that: The power conversion circuit as described in any one of claims 1 to 9; and, The portable power supply device (400) is provided with a power input interface (401), an output interface (402), a switch (403), and a grounding interface (404) on one side. The portable power supply device (400) is also provided with a second display screen (405) and a second knob (406) on the other side. The portable power supply device (400) is provided with a handle (407) on the top and four sets of rubber feet (408) on the bottom. The portable power supply device (400) is also provided with two sets of heat dissipation holes (409) symmetrically on both sides; The power input interface (401) includes a 220V AC mains input interface (401a), a battery input interface (401b), and a solar cell input interface (401c); The output interface (402) includes a DC 24V output interface (402a), a DC 12V output interface (402b), and a DC 5V output interface (402c).

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