Uninterruptible power supply with intelligent control for DC output

Abstract

The present invention discloses an uninterruptible power supply with intelligent control of DC output, which includes a power conversion and integration circuit, a first switch, a first controller, a DC / DC converter, a second controller and a battery pack. The first controller generates a first control signal and a second control signal, the second control signal is connected to the power conversion and integration circuit, and the first control signal is connected to the second controller provided in the DC / DC converter. The battery pack is connected to the DC / DC converter to form a first power path, the DC / DC converter is connected to the power conversion and integration circuit to form a second power path, and the battery pack is connected to the power conversion and integration circuit to form a third power path. The present invention can effectively control the switching between different power paths in different power supply states under the condition of providing different power supplies from different power sources, and stably and uninterruptedly provide the DC power required by DC electrical loads.

Description

Technical Field

[0001] The present invention relates to an uninterruptible power supply device with intelligent DC output control, especially an uninterruptible power supply device with multiple DC output socket interfaces that can directly supply the DC power source required by DC electrical appliances. Background Art

[0002] In the prior art, for general uninterruptible power supply devices, most of them only provide AC output power supply types, mainly to meet the usage needs of AC power supply forms that generally use the mains power provided by power companies. For commonly used electrical appliances today, such as electrical energy-consuming products using DC power, such as network cameras using CCTV, wireless network sharing devices, WiFi sharing devices, digital telephones or surveillance cameras, etc., if they want to use a general uninterruptible power supply device, they often have to connect an adapter at the input end to convert DC to AC first, and then plug the input end into the uninterruptible power supply device. Moreover, there is currently a lack of uninterruptible power supply devices with multiple DC power outputs. In terms of existing products on the market, there is no uninterruptible power supply device that directly provides multiple DC output power sockets. Therefore, the inventor has improved the above-mentioned deficiencies. Summary of the Invention

[0003] The present invention discloses an uninterruptible power supply device with intelligent DC output control. In addition to having an output terminal for general AC power, it also has a DC output power supply required by DC loads. The DC output power supply, for example, can actually include DC output power supplies with different voltage values such as DC3V, DC5V, DC12V, DC15V or DC24V, etc., to provide for different DC electrical appliance loads. For example, the present invention can provide the DC power required by the camera lens of a network monitor, and can also provide the DC power supply required by DC loads such as wireless network routers, WiFi sharing devices, wireless network servers and digital telephones. Through the uninterruptible power supply device of the present invention, it is possible to effectively control the switching between different power paths in different power supply states when different power sources provide different power supplies, and stably and uninterruptedly provide the DC power required by DC electrical appliance loads. Avoid the risk of loss of camera data, sudden interruption of network connection or interruption of digital phone operation for DC electrical appliance loads that require continuous DC power supply, and effectively improve the security of related digital data processing.

[0004] The uninterruptible power supply with intelligent control of DC output of the present invention is provided with a mains power supply input terminal, an AC power supply output terminal and a set of DC power supply output terminals. The uninterruptible power supply with intelligent control of DC output includes: a power conversion and integration circuit, the input terminal of the power conversion and integration circuit is connected to the mains power supply input terminal, and the power conversion and integration circuit has an AC output terminal; a first switch, the first terminal group of the first switch is connected to the mains power supply input terminal; the second terminal group of the first switch is connected to the AC output terminal of the power conversion and integration circuit; the third terminal group of the first switch is connected to the AC power supply output terminal; a first controller, the first controller generates a second control signal, and the second control signal is connected to the power conversion and integration circuit; a DC / DC converter, the DC / DC converter has a second power path; the second power path is the path formed by connecting the input terminal of the DC / DC converter to the power conversion and integration circuit; the output terminal of the DC / DC converter is connected to the set of DC power supply output terminals; a second controller, which is arranged inside the DC / DC converter, one end of the second controller is connected to a first control signal in the first controller; the other end of the second controller is connected to a second switch; and a battery pack, the battery pack is connected to the DC / DC converter to form a first power path; the battery pack is connected to the power conversion and integration circuit to form a third power path.

[0005] To enable a further understanding of the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the provided drawings are only for reference and illustration, and are not used to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the circuit block connection of an embodiment of the present invention;

[0007] Figure 2 It is a schematic diagram of the power path supplied by the mains power supply in an embodiment of the present invention;

[0008] Figure 3 It is a schematic diagram of the power path supplied by the battery pack and the mains power supply not working in an embodiment of the present invention;

[0009] Figure 4 It is a schematic diagram of the power path supplied by the mains power supply and the battery pack not working in an embodiment of the present invention;

[0010] Figure 5 It is a schematic diagram of the circuit block connection of another embodiment of the present invention;

[0011] Figure 6 It is a schematic diagram of the power path supplied by the mains power supply and solar power supply in another embodiment of the present invention;

[0012] Figure 7Schematic diagram of the power path for battery pack power supply and solar power supply without mains power in another embodiment of the present invention;

[0013] Figure 8 Schematic diagram of the power path for mains power supply and solar power supply without the battery pack in an embodiment of the present invention;

[0014] Figure 9 Schematic diagram of the internal circuit connection of the DC / DC converter in an embodiment of the present invention. Detailed implementation manners

[0015] The present invention discloses an uninterruptible power supply with intelligent control of DC output. The uninterruptible power supply of the present invention can effectively control the switching between different power paths in different power supply states when different power sources provide different power supplies, and stably provide the DC power required by DC electrical loads. It avoids the risk that the DC electrical loads that need to continuously supply DC power lose camera data, suddenly interrupt the network connection, or the digital phone stops operating due to the interruption of the DC power supply.

[0016] Hereinafter, reference will be made to the accompanying drawings to more fully describe various exemplary embodiments, and some exemplary embodiments will be shown in the accompanying drawings. However, the concept of the present invention may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that the present invention will be exhaustive and complete, and will fully convey the scope of the concept of the present invention to those skilled in the art. In the drawings, a certain part, object or the size of an image and the relative dimensional sizes and the relationship between connections or couplings may be exaggerated for clear expression of the structure of the elements; in addition, similar numbers always indicate similar elements.

[0017] It should be understood that although terms such as front (side), rear (side), above or below, left or right, etc. may be used herein, these terms are used to clearly distinguish the position of one element from the relative position relationship of the element, or to distinguish the difference in position between one element and another element, or the different relative position relationships between different elements. They are not used to limit the order or absolute position relationship presented by the text, serial number or its own meaning. Therefore, the element on the left (or front side) described below may be called the element on the right (or rear side) without departing from the teachings of the concept of the present invention; and there is not necessarily a continuous or sequential relationship in terms of text or numbers; moreover, the term "multiple" or "plural" may be used herein to describe the setting of multiple elements, but these multiple elements are not limited to the number of two, three, four or more than four elements implemented to represent the implemented technology. Above, it is stated first for clarification.

[0018] Please refer to Figure 1As shown, the uninterruptible power supply device 1 with intelligent control of DC output of the present invention has a mains power input terminal, an AC power output terminal (AC O / P) and a set of DC power output terminals (DC O / P). The uninterruptible power supply device 1 with intelligent control of DC output includes a power conversion and integration circuit 10, a first switch S1, a first controller 12, a DC / DC converter 20, a second controller 22 and a battery pack 14. Among them, in actual application, the mains power input terminal is a mains power source in AC form (utility power source). The input terminal of the power conversion and integration circuit 10 is connected to the mains power input terminal, and the power conversion and integration circuit 10 has an AC output terminal connected to the first switch S1. At the same time, the mains power is also directly connected to the first switch S1. In actual production, the power conversion and integration circuit 10 is composed of a converter 10a, an inverter 10b and a charger 10c. The converter 10a is used to convert AC power into DC power, the inverter 10b is used to invert DC power into AC power, and the charger 10c is used to charge the battery pack 14. In the present invention, the switching functions of the three circuits, namely the converter 10a, the inverter 10b and the charger 10c, are integrated into a power conversion and integration circuit 10, as shown in Figure 1 shown.

[0019] The set of DC power output terminals (DC O / P) actually refers to including multiple different DC output patterns, including but not limited to having multiple different DC voltage values output, or including DC power output interfaces with different connector socket patterns. That is, the set of DC power output terminals (DC O / P) is not a single DC power output, but has multiple DC power outputs.

[0020] Figure 1 As shown, the first terminal group of the first switch S1 (such as Figure 1 the upper left endpoint of the first switch S1 in Figure 1 is connected to the mains power input terminal, and the second terminal group of the first switch S1 (such as Figure 1The lower left endpoint of the first switch S1 (in the figure) is connected to the aforementioned AC power output terminal. The first controller 12 of the present invention generates a first control signal a and a second control signal b; the first control signal a is connected to the second controller 22 in the DC / DC converter 20, and the second control signal b is connected to the power conversion integration circuit 10. The first control signal a and the second control signal b are used to control different power paths of the AC power output terminal and the DC power output terminal of the uninterruptible power supply device 1 for intelligent control of DC output of the present invention under different input power sources or supply power conditions, thereby achieving the purpose of providing stable AC power and DC power outputs.

[0021] Figure 1 A first power path X and a second power path Y are connected to the input terminal of the DC / DC converter 20; the first power path X is formed by connecting the battery pack 14 to the input terminal of the DC / DC converter 20, and the second power path Y is the power path formed by connecting the input terminal of the DC / DC converter 20 to the power conversion integration circuit 10. As for the output terminal of the DC / DC converter, it is connected to the DC power output terminal group. In an embodiment, that is, the output terminal of the DC / DC converter 20 can be the DC power output terminal (DC O / P) in the uninterruptible power supply device 1 of the present invention. The battery pack 14 is connected to the DC / DC converter 20 and forms the first power path X. At the same time, the battery pack 14 is connected to the power conversion integration circuit 10 to form a third power path P. It includes a battery pack connection end 14a as the input / output interface for the connection between the battery pack 14 and the outside.

[0022] The second controller 22 is disposed inside the DC / DC converter 20. One end of the second controller 22 is connected to a first control signal a in the first controller 12, and the other end of the second controller 22 is connected to a second switch S2. The function of the second switch S2 is to provide a changeover switch capable of directly controlling the opening or closing of the DC power output terminal. In actual control applications, the second switch S2 can be a physical key or push-button switch, or a single-pole switch, which allows an operator to directly select to turn on the DC power supply of the DC power output terminal or stop the DC power supply of the DC power output terminal. On the other hand, the second switch S2 can also be directly controlled by the second controller 22 to turn on (ON) or off (OFF); of course, the second switch S2 can also be indirectly controlled by the first controller 12 to turn on (ON) or off (OFF) by controlling the second controller 22. As for the function of the first switch S1, it is to provide a stable AC output power supply to the AC power output terminal, and under different power source conditions, it executes and controls the switching to a power source that can supply power continuously and efficiently, thereby preventing the AC power output terminal from experiencing a power outage.

[0023] In actual production, the first controller 12 described in the present invention can be a micro-control chip or a microcontroller of a single chip; or the control function of the first controller 12 can be integrated together with a central processing unit (CPU) (not shown in the figure) of the uninterruptible power supply device 1; or, the first controller 12 described in the present invention itself is a microcontroller chip of the uninterruptible power supply device 1. That is, the present invention does not limit the production form of the first controller 12, and the first controller 12 can further control the power conversion integration circuit 10, the battery pack 14, and the DC / DC converter 20 to execute switching operations of different power path transmissions under the condition of mains power supply or no mains power supply. Similarly, the second controller 22 can also be a single micro-control chip or a microcontroller, or can be integrated into a switching circuit controller (not shown in the figure) of the DC / DC converter 20.

[0024] Refer to Figure 2As shown in the figure, it further explains the power path direction of the power supply when the main power supply is normally supplying power. When the main power supply is normally supplying AC power, the AC output power supply of the uninterruptible power supply 1 is directly supplied by the main power supply, that is, the first switch S1 is switched to the first terminal group to supply the AC power required by the AC power output terminal (ACO / P) of the uninterruptible power supply 1. At the same time, the first controller 12 controls the converter 10a in the power conversion and integration circuit 10 to convert the main power AC power into DC power through the second control signal b, and transmits it to the DC / DC converter 20 via the second power path Y, and then controls the second controller 22 through the first control signal a to enable the DC output terminal of the DC / DC converter 20 to output the DC power supply type required by the user, such as DC output: DC output power supplies with different voltage values such as DC3V, DC5V, DC12V, DC15V or DC24V, etc., to meet the needs of the user. At the same time, the second switch S2 is in the ON state, so that it can provide DC power required by terminal DC electrical appliances such as network sharing devices, digital telephones, digital speakers, digital 3C products, network cameras, network monitors, and servers. On the other hand, in Figure 2 In addition to the first controller 12 controlling the converter 10a in the power conversion and integration circuit 10 to convert the main power AC power into DC power through the second control signal b, it also controls the charger 10c at the same time. Through the connection of the third power path P, the charger 10c continuously charges the battery pack 14.

[0025] Refer to Figure 3 As shown in the figure, when the main power supply fails to supply AC power, the intelligent control DC output uninterruptible power supply 1 of the present invention uses the battery pack 14 as the main power supply source of the uninterruptible power supply 1. Among them, the second control signal b of the first controller 12 controls the inverter 10b in the power conversion and integration circuit 10 to invert the DC power provided by the battery pack 14 into AC power, and the DC power of the battery pack 14 is transmitted to the power conversion and integration circuit 10 through the third power path P, and then inverted into AC power by the inverter 10b and output to the AC power output terminal (AC O / P); at the same time, the first switch S1 will switch the output terminal to the aforementioned second terminal group through the control of the first controller 12 (such as Figure 1 The lower left endpoint of the left side of the first switch S1 in the figure) to supply AC power, thereby continuously supplying AC power output for some household appliances that require AC power type.

[0026] At the same time in Figure 3In this case, the first control signal a of the first controller 12 controls the second controller 22 in the DC / DC converter 20, thereby transmitting the DC power supply of the battery pack 14 to the DC / DC converter 20 via the first power path X, and the second controller 22 further controls the type of DC power supply output at the output end of the DC / DC converter 20. For example, it can control the output DC voltage value to be different DC output power supplies with voltage values such as DC3V, DC5V, DC12V, DC15V, or DC24V. At this time, the second switch S2 is controlled to be in the ON state.

[0027] Refer to Figure 4 As shown, when the mains power supply is normally supplying power and the battery pack 14 fails to operate, the uninterruptible power supply device 1 for intelligent control of DC output of the present invention mainly uses the AC power supply of the mains as the main power supply source of the uninterruptible power supply device 1. The difference from Figure 2 the embodiment is that although the battery is abnormal, the second control signal b of the first controller 12 can still transfer the charging energy to the DC / DC converter 20 through the power conversion integration circuit 10 to output DC power to the DC power output terminal (DC O / P); even in a system without a battery at all, the second control signal b of the present invention can still transfer the charging energy to the DC / DC converter 20 through the power conversion integration circuit 10 to output DC power to the DC power output terminal (DC O / P).

[0028] Figure 5 As shown, another embodiment of the present invention is the application embodiment of using the solar photovoltaic energy as one of the power supply sources for the uninterruptible power supply device 1 in Figure 1 . That is, [[ID= the disclosed embodiment can be a solar inverter 2 with an uninterruptible function in actual application. At this time, in terms of the name used in the present invention, the name of the uninterruptible power supply device 1 can also be directly renamed as the solar inverter 2. Because the main circuit therein does not change, in addition to supplying AC power from the mains, it can also provide a DC power supply input in DC form through a solar photovoltaic device. In view of having two different input power supplies, the intelligent control function of the present invention is more needed at this time to effectively use different power inputs and provide DC power output and AC power output with uninterruptible characteristics. ​ In the solar inverter 2 embodiment of ​ , there are also a mains power supply input terminal, an AC power output terminal, and a set of DC power output terminals. The difference is that the solar inverter 2 also has a DC power supply input terminal, which is used to connect the DC power supply generated by a solar photovoltaic panel; and the

[0029] ​ Inside the solar inverter 2 of the embodiment also includes: a power conversion and integration circuit 10, a first switch S1, a first controller 12, a DC / DC converter 20, a second controller 22, a battery pack connection terminal 14a, and a solar charge controller 30; wherein the battery pack connection terminal 14a is externally connected to the battery pack 14 in an external form. The difference between the solar inverter 2 and the uninterruptible power supply 1 is that a solar charge controller 30 is provided, and the solar charge controller 30 is simultaneously connected to the first controller 12, the power conversion and integration circuit 10, the DC / DC converter 20, and the battery pack connection terminal 14a. Furthermore, a third control signal c is connected between the solar charge controller 30 and the first controller; and a fourth power path Q is connected between the solar charge controller 30 and the power conversion and integration circuit 10, a sixth power path Z is connected between the solar charge controller 30 and the DC / DC converter 20, and a fifth power path R is connected between the solar charge controller 30 and the aforementioned battery pack connection terminal 14a. As for the interconnection relationship between the components such as the power conversion and integration circuit 10, the first switch S1, the first controller 12, the DC / DC converter 2, the second controller 22, and the battery pack connection terminal 14a in the solar inverter 2, it is basically the same as ​ that in the uninterruptible power supply 1, and will not be repeated here.

[0030] ​ The solar charge controller 30 in

[0031] Refer to ​As shown, when all the different power sources used are in normal power supply, that is, when the mains power supply normally supplies AC power and the solar photovoltaic power normally supplies DC power, the AC output power of the solar inverter 2 is directly supplied by the mains power supply. That is, the first switch S1 is switched to the first terminal group to supply the AC power required by the AC power output terminal (AC O / P) of the solar inverter 2. At the same time, the first controller 12 controls the converter 10a in the power conversion and integration circuit 10 to convert the mains AC power into DC power through the second control signal b, and then transmits it to the DC / DC converter 20 through the second power path Y. After that, the first control signal a is used to control the second controller 22 to enable the DC output terminal of the DC / DC converter 20 to output the DC power output type required by the user, such as DC outputs: DC power outputs with different voltage values such as DC3V, DC5V, DC12V, DC15V or DC24V, etc., to meet the needs of the user. At the same time, the second switch S2 is in the ON state, so as to provide the DC power required by terminal DC electrical appliances such as network sharing devices, digital telephones, digital speakers, digital 3C products, network cameras, network monitors and servers, etc. In addition, in ​ in addition to the first controller 12 controlling the converter 10a in the power conversion and integration circuit 10 to convert the mains AC power into DC power through the second control signal b, it also controls the charger 10c at the same time, and further transmits the electric power through the connection of the third power path P, so that the charger 10c continuously charges the battery pack 14.

[0032] Importantly, in ​ the first controller 12 controls the solar charge controller 30 to adjust the DC input power (DC I / P) generated by the solar photovoltaic device into the DC power type required by the DC / DC converter 20 through the aforementioned third control signal c, and then further controls the second controller 22 through the first control signal a. Through the transmission of the sixth power path Z, the DC / DC converter 20 can continuously output DC power. Of course, at this time, the second switch S2 is in the ON state. In this way, it can stably provide DC output power for electrical products with the required DC load type.

[0033] ​When the mains power supply fails and stops supplying AC power, the intelligent solar inverter 2 that controls DC output in the present invention uses the DC input power supply (DC I / P) provided by the battery pack 14 and the solar photovoltaic device as the main power supply source for the solar inverter 2. Among them, the second control signal b of the first controller 12 controls the inverter 10b in the power conversion integration circuit 10 to invert the DC power supply provided by the battery pack 14 into AC power. The DC power supply of the battery pack 14 is transmitted to the power conversion integration circuit 10 through the third power path P, and after being inverted into AC power by the inverter 10b, it is output to the AC power output terminal (AC O / P); at the same time, the first switch S1 will switch the output terminal to the aforementioned second terminal group (such as ​ the lower left endpoint of the first switch S1 in ​ ), and then supply AC power, thereby continuously supplying AC power output for some household appliances that require AC power type. In

[0034] Importantly, in ​ , the first control signal a of the first controller 12 controls the second controller 22 in the DC / DC converter 20, thereby transmitting the DC power supply of the battery pack 14 to the DC / DC converter 20 through the first power path X. The second controller 22 further controls the DC power supply type output by the output terminal of the DC / DC converter 20. For example, it can control the output DC voltage value to be: DC3V, DC5V, DC12V, DC15V, or DC24V, etc. different voltage value DC output power supplies. At this time, the second switch S2 is controlled to be in the on state.

[0035] ​ As shown, when the mains power supply is normally powered and the solar photovoltaic device is also normally powered, but the battery pack 14 fails and cannot operate, the intelligent solar inverter 2 that controls DC output in the present invention uses the AC power of the mains and the DC power of the solar photovoltaic device as the main power supply source for the solar inverter 2. The difference from ​An embodiment of this invention is that even if the battery is abnormal, the second control signal b of the first controller 12 can still transfer the charging energy to the DC / DC converter 20 through the power conversion integration circuit 10 to output a DC power supply to the DC power supply output terminal (DC O / P); even in a system without a battery at all, the second control signal b of this invention can still transfer the charging energy to the DC / DC converter 20 through the power conversion integration circuit 10 to output a DC power supply to the DC power supply output terminal (DC O / P).

[0036] Importantly, ​ in this, the first controller 12 further controls the solar charge controller 30 through the aforementioned third control signal c to modulate the DC input power supply (DC I / P) generated by the solar photovoltaic device into the DC power supply form required by the DC / DC converter 20, and then further controls the second controller 22 through the first control signal a, so that the DC / DC converter 20 can continuously output a DC power supply, and the second switch S2 is in the ON state, so that a DC output power supply can be stably provided for electrical products of the required DC load type for use.

[0037] The above-mentioned ​ In the description of the embodiment of this invention, the DC input power supply (DC I / P) of the solar photovoltaic energy is controlled and used as an auxiliary for the DC power supply output terminal (DC O / P). Therefore, the fourth power path Q, the fifth power path R and other paths are not described. However, if in an application embodiment of a solar photovoltaic device with a high-power DC output power supply, such as a solar photovoltaic power plant, through the function of the fourth power path Q, the DC power supply of the solar photovoltaic device can also continuously supply an AC power supply to the AC power supply output terminal (AC O / P) through the inversion function of the power conversion integration circuit 10; or the DC power supply of the solar photovoltaic device can directly charge the battery pack 14 through the fifth power path R, or continuously charge the battery pack 14 through the charging function of the power conversion integration circuit 10. That is, when the electrical energy or electrical power of the solar photovoltaic device of this invention is large enough to supply the AC power supply output (AC O / P) and charge the battery pack 14, in addition to supplying the DC power supply required by the DC load electrical appliances, it can also supply the AC power supply output and perform the charging operation of the battery pack at the same time.

[0038] ​As shown, a schematic diagram of the internal circuit connection of the DC / DC converter 20 of the present invention is further disclosed. A buck power conversion circuit 26, an auxiliary power supply 24, a serial communication interface 23, and at least two DC output interfaces OP1 and OP2 are provided in the DC / DC converter 20. The buck power conversion circuit 26 is connected to the second controller 22; the input end of the buck power conversion circuit 26 is connected to the first power path X and the second power path Y, and further connected to the aforementioned sixth power path Z, that is, ​ the position of the DC input marked in, mainly receiving the power transmission effects of the first power path X, the second power path Y, and the sixth power path Z. Moreover, the output end of the buck power conversion circuit 26 can be the output end of the DC / DC converter 20, and this output end actually has multiple DC outputs, and then is further connected to sockets of different DC output types. In actual application and production, the buck power conversion circuit 26 is in the circuit topology form of a Buck Converter, which is a buck-type power converter, but the present invention is not limited thereto. The auxiliary power supply 24 (Auxiliary Power Supply) is connected to the second controller 22; the input end of the auxiliary power supply 24 is connected to the input end of the buck power conversion circuit 26, that is, connected to ​ the DC input shown in, and this DC input is connected to the first power path X and the second power path Y. The serial communication interface 23 is connected to the second controller 22 and is connected to the auxiliary power supply 24. In ​ , four groups of DC output interfaces are disclosed, namely the first DC output interface OP1, the second DC output interface OP2, the third DC output interface OP3, and the fourth DC output interface OP4. In actual application, the present invention has at least two DC output interfaces (also referring to any two of OP1 to OP4), and the input ends of the at least two DC output interfaces are connected to the output end of the buck power conversion circuit 26; further, the output end of the aforementioned DC / DC converter 20 is connected to the DC power output end of the uninterruptible power supply 1 or the solar inverter 2, and actually the output end of the buck power conversion circuit 26 is connected to the DC power output ends of the first to fourth DC output interfaces OP1 - OP4.

[0039] In actual production, the first to fourth DC output interfaces OP1-OP4 are DC-type sockets, or are socket types with circular jacks that supply DC 12V, 15V, or 5V by a general adapter, so as to be used by different DC electrical loads. In one embodiment, between the first to fourth DC output interfaces OP1-OP4 and the output end of the buck-type power conversion circuit 26, first to fourth fuses F1-F4 are individually connected in series, serving as protection against overcurrent or overload of the circuit output of the DC / DC converter 20. In another embodiment, first to fourth LED lights L1-L4 are individually connected in parallel to the first to fourth DC output interfaces OP1-OP4, serving as a display for indicating whether the DC outputs of the first to fourth DC output interfaces OP1-OP4 are working or not. Further, first to fourth resistors R1-R4 are respectively connected in series to the first to fourth LED lights L1-L4, as shown in ​ shown.

[0040] In summary, the uninterruptible power supply device with intelligent control of DC output in the present invention can achieve switching between different power paths of different power supply states under different power sources providing different power supplies. Whether there is only mains power, or there are mains and solar power, or only solar power, or even only the power supply of the battery pack remains, the present invention can effectively control the switching. In addition to continuously providing AC power, it can still stably and uninterruptedly provide the DC power required by DC electrical loads. It avoids risks such as loss of camera data, sudden interruption of network connection, or interruption of digital phone operation for DC electrical loads that need to continuously supply DC power, such as network cameras or WiFi wireless access points. Obviously, the technical content of the present invention has strong patent application requirements.

[0041] The content disclosed above is only the preferred and feasible embodiment of the present invention, and does not limit the scope of patent application of the present invention. Therefore, all equivalent technical changes made by using the content of the specification and drawings of the present invention are included in the claims of the present invention.

Claims

1. An uninterruptible power supply device for intelligently controlling DC output, characterized in that: The intelligently controlled DC output uninterruptible power supply device is provided with a mains power input terminal, an AC power output terminal and a set of DC power output terminals. The intelligently controlled DC output uninterruptible power supply device includes: a power conversion integration circuit, wherein the input terminal of the power conversion integration circuit is connected to the mains power input terminal, and the power conversion integration circuit has an AC output terminal; a first switch, wherein a first terminal of the first switch is connected to the mains power input terminal; a second terminal of the first switch is connected to the AC output terminal of the power conversion integration circuit; and a third terminal of the first switch is connected to the AC power output terminal; a first controller, the first controller generating a second control signal, the second control signal being connected to the power conversion integration circuit; a DC / DC converter having a second power path; the second power path is formed by connecting the input end of the DC / DC converter to the power conversion integration circuit; and the output end of the DC / DC converter is connected to the set of DC power output ends; a second controller disposed inside the DC / DC converter, wherein one end of the second controller is connected to a first control signal in the first controller; and the other end of the second controller is connected to a second switch; and a battery pack connected to the DC / DC converter to form a first power path; and connected to the power conversion integration circuit to form a third power path; The first controller generates the corresponding first and second control signals based on the power supply conditions of the mains power input terminal and the battery pack, and controls the second controller of the DC / DC converter via the first control signal so that the DC power output terminal of the DC / DC converter outputs multiple sets of DC output power with different voltage values. The second control signal is used to control the operation of a converter, an inverter, and a charger in the power conversion integration circuit so that the charger charges the battery pack or the inverter converts the DC power of the battery pack into AC current and outputs it to the AC output terminal. When the AC power input terminal and the battery pack are normal, the first switch is switched to the first terminal group, the first controller controls the converter to convert the AC power of the AC power into DC power and transmits the DC power to the DC / DC converter via the second power path through the second power path, and controls the charger to charge the battery pack via the third power path through the second control signal; When the AC power supply at the AC power input end fails, the first switch switches to the second end group, and the first controller controls the inverter through the second control signal to convert the DC power provided by the battery pack via the third power path into AC power, and then outputs it to the AC power output end. The first controller controls the second controller through the first control signal so that the DC power of the battery pack is transmitted to the DC / DC converter via the first power path.

2. The uninterruptible power supply device for intelligently controlling DC output according to claim 1, characterized in that: The DC / DC converter is equipped with: a step-down power conversion circuit connected to the second controller; an input end of the step-down power conversion circuit connected to the first power path and the second power path; an output end of the step-down power conversion circuit serving as an output end of the DC / DC converter; and An auxiliary power supply is connected to the second controller; an input end of the auxiliary power supply is connected to the first power path and the second power path.

3. The uninterruptible power supply device for intelligently controlling DC output according to claim 2, characterized in that: The DC / DC converter also includes: A serial communication interface is connected to the second controller and is also connected to the auxiliary power supply.

4. The uninterruptible power supply device for intelligently controlling DC output according to claim 2, characterized in that: The output terminal of the DC / DC converter includes: At least two DC output interfaces, input ends of the at least two DC output interfaces being connected to the output end of the step-down power conversion circuit; The output end of the DC / DC converter is connected to the set of DC power output ends, and the output end of the step-down power conversion circuit is connected to the DC power output of the at least two DC output interfaces.

5. An uninterruptible power supply device for intelligently controlling DC output, characterized in that: The intelligently controlled DC output UPS has a mains power input, an AC power output, and a set of DC power outputs. It also has a DC power input for connecting to a DC power source generated by a solar photovoltaic panel. The battery pack is also configured as an external connection. The intelligently controlled DC output UPS includes: a power conversion integration circuit, wherein the input terminal of the power conversion integration circuit is connected to the mains power input terminal, and the power conversion integration circuit has an AC output terminal; a first switch, wherein a first terminal of the first switch is connected to the mains power input terminal; a second terminal of the first switch is connected to the AC output terminal of the power conversion integration circuit; and a third terminal of the first switch is connected to the AC power output terminal; a first controller, the first controller generating a second control signal, the second control signal being connected to the power conversion integration circuit; a DC / DC converter having a second power path; the second power path is formed by connecting the input end of the DC / DC converter to the power conversion integration circuit; and the output end of the DC / DC converter is connected to the set of DC power output ends; a second controller disposed inside the DC / DC converter, wherein one end of the second controller is connected to a first control signal in the first controller; and the other end of the second controller is connected to a second switch; a battery pack connection terminal, the battery pack connection terminal being connected to the DC / DC converter to form a first power path; the battery pack connection terminal being connected to the power conversion integration circuit to form a third power path; and a solar charge controller connected to the first controller, the power conversion integration circuit, the DC / DC converter, and the battery pack connection terminal; a third control signal connected between the solar charge controller and the first controller; The first controller generates the corresponding first and second control signals based on the power supply conditions of the mains power input terminal and the battery pack, and controls the second controller of the DC / DC converter via the first control signal so that the DC power output terminal of the DC / DC converter outputs multiple sets of DC output power with different voltage values. The second control signal is used to control the operation of a converter, an inverter, and a charger in the power conversion integration circuit so that the charger charges the battery pack or the inverter converts the DC power of the battery pack into AC current and outputs it to the AC output terminal. When the AC power input terminal and the battery pack are normal, the first switch is switched to the first terminal group, the first controller controls the converter to convert the AC power of the AC power into DC power and transmits the DC power to the DC / DC converter via the second power path through the second power path, and controls the charger to charge the battery pack via the third power path through the second control signal; When the AC power supply at the AC power input end fails, the first switch switches to the second end group, and the first controller controls the inverter through the second control signal to convert the DC power provided by the battery pack via the third power path into AC power, and then outputs it to the AC power output end. The first controller controls the second controller through the first control signal so that the DC power of the battery pack is transmitted to the DC / DC converter via the first power path.

6. The uninterruptible power supply device for intelligently controlling DC output according to claim 5, characterized in that: The solar charge controller is equipped with: a maximum power point tracker for performing a solar photovoltaic maximum power point tracking operation of the solar charge controller; and a pulse width modulation controller for performing pulse width modulation operation of the power switch circuit of the solar charge controller; Among them, a fourth power path is connected between the solar charge controller and the power conversion integration circuit; a fifth power path is connected between the solar charge controller and the DC / DC converter; and a sixth power path is connected between the solar charge controller and the battery pack connection terminal.

7. The uninterruptible power supply device for intelligently controlling DC output according to claim 5, characterized in that: The DC / DC converter is equipped with: a step-down power conversion circuit connected to the second controller; an input end of the step-down power conversion circuit connected to the first power path and the second power path; an output end of the step-down power conversion circuit serving as an output end of the DC / DC converter; an auxiliary power supply connected to the second controller; an input end of the auxiliary power supply is connected to the first power path and the second power path; and A serial communication interface is connected to the second controller and is also connected to the auxiliary power supply.

8. The uninterruptible power supply device for intelligently controlling DC output according to claim 7, characterized in that: The output end of the DC / DC converter includes: At least two DC output interfaces, input ends of the at least two DC output interfaces being connected to the output end of the step-down power conversion circuit; The output end of the DC / DC converter is connected to the set of DC power output ends, and the output end of the step-down power conversion circuit is connected to the DC power output of the at least two DC output interfaces.

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